mpegvideo.c 105 KB
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/*
 * The simplest mpeg encoder (well, it was the simplest!)
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 * Copyright (c) 2000,2001 Fabrice Bellard
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 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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 *
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 * 4MV & hq & B-frame encoding stuff by Michael Niedermayer <michaelni@gmx.at>
 *
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 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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/**
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 * @file
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 * The simplest mpeg encoder (well, it was the simplest!).
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 */

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#include "libavutil/attributes.h"
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#include "libavutil/avassert.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/internal.h"
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#include "libavutil/motion_vector.h"
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#include "libavutil/timer.h"
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#include "avcodec.h"
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#include "blockdsp.h"
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#include "h264chroma.h"
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#include "idctdsp.h"
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#include "internal.h"
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#include "mathops.h"
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#include "mpeg_er.h"
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#include "mpegutils.h"
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#include "mpegvideo.h"
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#include "mpegvideodata.h"
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#include "mjpegenc.h"
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#include "msmpeg4.h"
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#include "qpeldsp.h"
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#include "thread.h"
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#include "wmv2.h"
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#include <limits.h>
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static void dct_unquantize_mpeg1_intra_c(MpegEncContext *s,
                                   int16_t *block, int n, int qscale)
{
    int i, level, nCoeffs;
    const uint16_t *quant_matrix;

    nCoeffs= s->block_last_index[n];

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    block[0] *= n < 4 ? s->y_dc_scale : s->c_dc_scale;
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    /* XXX: only MPEG-1 */
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    quant_matrix = s->intra_matrix;
    for(i=1;i<=nCoeffs;i++) {
        int j= s->intra_scantable.permutated[i];
        level = block[j];
        if (level) {
            if (level < 0) {
                level = -level;
                level = (int)(level * qscale * quant_matrix[j]) >> 3;
                level = (level - 1) | 1;
                level = -level;
            } else {
                level = (int)(level * qscale * quant_matrix[j]) >> 3;
                level = (level - 1) | 1;
            }
            block[j] = level;
        }
    }
}

static void dct_unquantize_mpeg1_inter_c(MpegEncContext *s,
                                   int16_t *block, int n, int qscale)
{
    int i, level, nCoeffs;
    const uint16_t *quant_matrix;

    nCoeffs= s->block_last_index[n];

    quant_matrix = s->inter_matrix;
    for(i=0; i<=nCoeffs; i++) {
        int j= s->intra_scantable.permutated[i];
        level = block[j];
        if (level) {
            if (level < 0) {
                level = -level;
                level = (((level << 1) + 1) * qscale *
                         ((int) (quant_matrix[j]))) >> 4;
                level = (level - 1) | 1;
                level = -level;
            } else {
                level = (((level << 1) + 1) * qscale *
                         ((int) (quant_matrix[j]))) >> 4;
                level = (level - 1) | 1;
            }
            block[j] = level;
        }
    }
}

static void dct_unquantize_mpeg2_intra_c(MpegEncContext *s,
                                   int16_t *block, int n, int qscale)
{
    int i, level, nCoeffs;
    const uint16_t *quant_matrix;

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    if (s->q_scale_type) qscale = ff_mpeg2_non_linear_qscale[qscale];
    else                 qscale <<= 1;
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    if(s->alternate_scan) nCoeffs= 63;
    else nCoeffs= s->block_last_index[n];

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    block[0] *= n < 4 ? s->y_dc_scale : s->c_dc_scale;
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    quant_matrix = s->intra_matrix;
    for(i=1;i<=nCoeffs;i++) {
        int j= s->intra_scantable.permutated[i];
        level = block[j];
        if (level) {
            if (level < 0) {
                level = -level;
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                level = (int)(level * qscale * quant_matrix[j]) >> 4;
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                level = -level;
            } else {
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                level = (int)(level * qscale * quant_matrix[j]) >> 4;
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            }
            block[j] = level;
        }
    }
}

static void dct_unquantize_mpeg2_intra_bitexact(MpegEncContext *s,
                                   int16_t *block, int n, int qscale)
{
    int i, level, nCoeffs;
    const uint16_t *quant_matrix;
    int sum=-1;

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    if (s->q_scale_type) qscale = ff_mpeg2_non_linear_qscale[qscale];
    else                 qscale <<= 1;
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    if(s->alternate_scan) nCoeffs= 63;
    else nCoeffs= s->block_last_index[n];

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    block[0] *= n < 4 ? s->y_dc_scale : s->c_dc_scale;
    sum += block[0];
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    quant_matrix = s->intra_matrix;
    for(i=1;i<=nCoeffs;i++) {
        int j= s->intra_scantable.permutated[i];
        level = block[j];
        if (level) {
            if (level < 0) {
                level = -level;
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                level = (int)(level * qscale * quant_matrix[j]) >> 4;
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                level = -level;
            } else {
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                level = (int)(level * qscale * quant_matrix[j]) >> 4;
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            }
            block[j] = level;
            sum+=level;
        }
    }
    block[63]^=sum&1;
}

static void dct_unquantize_mpeg2_inter_c(MpegEncContext *s,
                                   int16_t *block, int n, int qscale)
{
    int i, level, nCoeffs;
    const uint16_t *quant_matrix;
    int sum=-1;

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    if (s->q_scale_type) qscale = ff_mpeg2_non_linear_qscale[qscale];
    else                 qscale <<= 1;
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    if(s->alternate_scan) nCoeffs= 63;
    else nCoeffs= s->block_last_index[n];

    quant_matrix = s->inter_matrix;
    for(i=0; i<=nCoeffs; i++) {
        int j= s->intra_scantable.permutated[i];
        level = block[j];
        if (level) {
            if (level < 0) {
                level = -level;
                level = (((level << 1) + 1) * qscale *
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                         ((int) (quant_matrix[j]))) >> 5;
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                level = -level;
            } else {
                level = (((level << 1) + 1) * qscale *
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                         ((int) (quant_matrix[j]))) >> 5;
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            }
            block[j] = level;
            sum+=level;
        }
    }
    block[63]^=sum&1;
}

static void dct_unquantize_h263_intra_c(MpegEncContext *s,
                                  int16_t *block, int n, int qscale)
{
    int i, level, qmul, qadd;
    int nCoeffs;

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    av_assert2(s->block_last_index[n]>=0 || s->h263_aic);
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    qmul = qscale << 1;

    if (!s->h263_aic) {
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        block[0] *= n < 4 ? s->y_dc_scale : s->c_dc_scale;
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        qadd = (qscale - 1) | 1;
    }else{
        qadd = 0;
    }
    if(s->ac_pred)
        nCoeffs=63;
    else
        nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];

    for(i=1; i<=nCoeffs; i++) {
        level = block[i];
        if (level) {
            if (level < 0) {
                level = level * qmul - qadd;
            } else {
                level = level * qmul + qadd;
            }
            block[i] = level;
        }
    }
}

static void dct_unquantize_h263_inter_c(MpegEncContext *s,
                                  int16_t *block, int n, int qscale)
{
    int i, level, qmul, qadd;
    int nCoeffs;

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    av_assert2(s->block_last_index[n]>=0);
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    qadd = (qscale - 1) | 1;
    qmul = qscale << 1;

    nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];

    for(i=0; i<=nCoeffs; i++) {
        level = block[i];
        if (level) {
            if (level < 0) {
                level = level * qmul - qadd;
            } else {
                level = level * qmul + qadd;
            }
            block[i] = level;
        }
    }
}

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static void gray16(uint8_t *dst, const uint8_t *src, ptrdiff_t linesize, int h)
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{
    while(h--)
        memset(dst + h*linesize, 128, 16);
}

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static void gray8(uint8_t *dst, const uint8_t *src, ptrdiff_t linesize, int h)
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{
    while(h--)
        memset(dst + h*linesize, 128, 8);
}

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/* init common dct for both encoder and decoder */
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static av_cold int dct_init(MpegEncContext *s)
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{
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    ff_blockdsp_init(&s->bdsp, s->avctx);
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    ff_h264chroma_init(&s->h264chroma, 8); //for lowres
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    ff_hpeldsp_init(&s->hdsp, s->avctx->flags);
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    ff_mpegvideodsp_init(&s->mdsp);
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    ff_videodsp_init(&s->vdsp, s->avctx->bits_per_raw_sample);
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    if (s->avctx->debug & FF_DEBUG_NOMC) {
        int i;
        for (i=0; i<4; i++) {
            s->hdsp.avg_pixels_tab[0][i] = gray16;
            s->hdsp.put_pixels_tab[0][i] = gray16;
            s->hdsp.put_no_rnd_pixels_tab[0][i] = gray16;

            s->hdsp.avg_pixels_tab[1][i] = gray8;
            s->hdsp.put_pixels_tab[1][i] = gray8;
            s->hdsp.put_no_rnd_pixels_tab[1][i] = gray8;
        }
    }

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    s->dct_unquantize_h263_intra = dct_unquantize_h263_intra_c;
    s->dct_unquantize_h263_inter = dct_unquantize_h263_inter_c;
    s->dct_unquantize_mpeg1_intra = dct_unquantize_mpeg1_intra_c;
    s->dct_unquantize_mpeg1_inter = dct_unquantize_mpeg1_inter_c;
    s->dct_unquantize_mpeg2_intra = dct_unquantize_mpeg2_intra_c;
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    if (s->avctx->flags & AV_CODEC_FLAG_BITEXACT)
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        s->dct_unquantize_mpeg2_intra = dct_unquantize_mpeg2_intra_bitexact;
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    s->dct_unquantize_mpeg2_inter = dct_unquantize_mpeg2_inter_c;
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    if (HAVE_INTRINSICS_NEON)
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        ff_mpv_common_init_neon(s);
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    if (ARCH_ALPHA)
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        ff_mpv_common_init_axp(s);
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    if (ARCH_ARM)
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        ff_mpv_common_init_arm(s);
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    if (ARCH_PPC)
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        ff_mpv_common_init_ppc(s);
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    if (ARCH_X86)
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        ff_mpv_common_init_x86(s);
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    if (ARCH_MIPS)
        ff_mpv_common_init_mips(s);
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    return 0;
}

av_cold void ff_mpv_idct_init(MpegEncContext *s)
{
    ff_idctdsp_init(&s->idsp, s->avctx);

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    /* load & permutate scantables
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     * note: only wmv uses different ones
     */
    if (s->alternate_scan) {
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        ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
        ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
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    } else {
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        ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
        ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
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    }
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    ff_init_scantable(s->idsp.idct_permutation, &s->intra_h_scantable, ff_alternate_horizontal_scan);
    ff_init_scantable(s->idsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
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}

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static int alloc_picture(MpegEncContext *s, Picture *pic, int shared)
{
    return ff_alloc_picture(s->avctx, pic, &s->me, &s->sc, shared, 0,
                            s->chroma_x_shift, s->chroma_y_shift, s->out_format,
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                            s->mb_stride, s->mb_width, s->mb_height, s->b8_stride,
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                            &s->linesize, &s->uvlinesize);
}

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static int init_duplicate_context(MpegEncContext *s)
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{
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    int y_size = s->b8_stride * (2 * s->mb_height + 1);
    int c_size = s->mb_stride * (s->mb_height + 1);
    int yc_size = y_size + 2 * c_size;
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    int i;

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    if (s->mb_height & 1)
        yc_size += 2*s->b8_stride + 2*s->mb_stride;

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    s->sc.edge_emu_buffer =
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    s->me.scratchpad   =
    s->me.temp         =
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    s->sc.rd_scratchpad   =
    s->sc.b_scratchpad    =
    s->sc.obmc_scratchpad = NULL;
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    if (s->encoding) {
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        FF_ALLOCZ_OR_GOTO(s->avctx, s->me.map,
                          ME_MAP_SIZE * sizeof(uint32_t), fail)
        FF_ALLOCZ_OR_GOTO(s->avctx, s->me.score_map,
                          ME_MAP_SIZE * sizeof(uint32_t), fail)
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        if (s->noise_reduction) {
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            FF_ALLOCZ_OR_GOTO(s->avctx, s->dct_error_sum,
                              2 * 64 * sizeof(int), fail)
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        }
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    }
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    FF_ALLOCZ_OR_GOTO(s->avctx, s->blocks, 64 * 12 * 2 * sizeof(int16_t), fail)
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    s->block = s->blocks[0];
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    for (i = 0; i < 12; i++) {
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        s->pblocks[i] = &s->block[i];
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    }
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    if (s->avctx->codec_tag == AV_RL32("VCR2")) {
        // exchange uv
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        FFSWAP(void *, s->pblocks[4], s->pblocks[5]);
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    }
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    if (s->out_format == FMT_H263) {
        /* ac values */
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        FF_ALLOCZ_OR_GOTO(s->avctx, s->ac_val_base,
                          yc_size * sizeof(int16_t) * 16, fail);
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        s->ac_val[0] = s->ac_val_base + s->b8_stride + 1;
        s->ac_val[1] = s->ac_val_base + y_size + s->mb_stride + 1;
        s->ac_val[2] = s->ac_val[1] + c_size;
    }

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    return 0;
fail:
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    return -1; // free() through ff_mpv_common_end()
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}

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static void free_duplicate_context(MpegEncContext *s)
{
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    if (!s)
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        return;
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    av_freep(&s->sc.edge_emu_buffer);
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    av_freep(&s->me.scratchpad);
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    s->me.temp =
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    s->sc.rd_scratchpad =
    s->sc.b_scratchpad =
    s->sc.obmc_scratchpad = NULL;
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    av_freep(&s->dct_error_sum);
    av_freep(&s->me.map);
    av_freep(&s->me.score_map);
    av_freep(&s->blocks);
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    av_freep(&s->ac_val_base);
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    s->block = NULL;
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}

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static void backup_duplicate_context(MpegEncContext *bak, MpegEncContext *src)
{
#define COPY(a) bak->a = src->a
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    COPY(sc.edge_emu_buffer);
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    COPY(me.scratchpad);
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    COPY(me.temp);
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    COPY(sc.rd_scratchpad);
    COPY(sc.b_scratchpad);
    COPY(sc.obmc_scratchpad);
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    COPY(me.map);
    COPY(me.score_map);
    COPY(blocks);
    COPY(block);
    COPY(start_mb_y);
    COPY(end_mb_y);
    COPY(me.map_generation);
    COPY(pb);
    COPY(dct_error_sum);
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    COPY(dct_count[0]);
    COPY(dct_count[1]);
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    COPY(ac_val_base);
    COPY(ac_val[0]);
    COPY(ac_val[1]);
    COPY(ac_val[2]);
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#undef COPY
}

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int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src)
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{
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    MpegEncContext bak;
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    int i, ret;
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    // FIXME copy only needed parts
    // START_TIMER
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    backup_duplicate_context(&bak, dst);
    memcpy(dst, src, sizeof(MpegEncContext));
    backup_duplicate_context(dst, &bak);
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    for (i = 0; i < 12; i++) {
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        dst->pblocks[i] = &dst->block[i];
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    }
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    if (dst->avctx->codec_tag == AV_RL32("VCR2")) {
        // exchange uv
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        FFSWAP(void *, dst->pblocks[4], dst->pblocks[5]);
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    }
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    if (!dst->sc.edge_emu_buffer &&
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        (ret = ff_mpeg_framesize_alloc(dst->avctx, &dst->me,
                                       &dst->sc, dst->linesize)) < 0) {
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        av_log(dst->avctx, AV_LOG_ERROR, "failed to allocate context "
               "scratch buffers.\n");
        return ret;
    }
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    // STOP_TIMER("update_duplicate_context")
    // about 10k cycles / 0.01 sec for  1000frames on 1ghz with 2 threads
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    return 0;
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}

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int ff_mpeg_update_thread_context(AVCodecContext *dst,
                                  const AVCodecContext *src)
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{
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    int i, ret;
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    MpegEncContext *s = dst->priv_data, *s1 = src->priv_data;

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    if (dst == src)
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        return 0;
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    av_assert0(s != s1);

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    // FIXME can parameters change on I-frames?
    // in that case dst may need a reinit
    if (!s->context_initialized) {
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        int err;
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        memcpy(s, s1, sizeof(MpegEncContext));

        s->avctx                 = dst;
        s->bitstream_buffer      = NULL;
        s->bitstream_buffer_size = s->allocated_bitstream_buffer_size = 0;

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        if (s1->context_initialized){
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//             s->picture_range_start  += MAX_PICTURE_COUNT;
//             s->picture_range_end    += MAX_PICTURE_COUNT;
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            ff_mpv_idct_init(s);
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            if((err = ff_mpv_common_init(s)) < 0){
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                memset(s, 0, sizeof(MpegEncContext));
                s->avctx = dst;
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                return err;
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            }
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        }
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    }

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    if (s->height != s1->height || s->width != s1->width || s->context_reinit) {
        s->context_reinit = 0;
        s->height = s1->height;
        s->width  = s1->width;
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        if ((ret = ff_mpv_common_frame_size_change(s)) < 0)
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            return ret;
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    }

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    s->avctx->coded_height  = s1->avctx->coded_height;
    s->avctx->coded_width   = s1->avctx->coded_width;
    s->avctx->width         = s1->avctx->width;
    s->avctx->height        = s1->avctx->height;

    s->coded_picture_number = s1->coded_picture_number;
    s->picture_number       = s1->picture_number;

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    av_assert0(!s->picture || s->picture != s1->picture);
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    if(s->picture)
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    for (i = 0; i < MAX_PICTURE_COUNT; i++) {
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        ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
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        if (s1->picture && s1->picture[i].f->buf[0] &&
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            (ret = ff_mpeg_ref_picture(s->avctx, &s->picture[i], &s1->picture[i])) < 0)
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            return ret;
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    }
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#define UPDATE_PICTURE(pic)\
do {\
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    ff_mpeg_unref_picture(s->avctx, &s->pic);\
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    if (s1->pic.f && s1->pic.f->buf[0])\
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        ret = ff_mpeg_ref_picture(s->avctx, &s->pic, &s1->pic);\
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    else\
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        ret = ff_update_picture_tables(&s->pic, &s1->pic);\
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    if (ret < 0)\
        return ret;\
} while (0)

    UPDATE_PICTURE(current_picture);
    UPDATE_PICTURE(last_picture);
    UPDATE_PICTURE(next_picture);
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#define REBASE_PICTURE(pic, new_ctx, old_ctx)                                 \
    ((pic && pic >= old_ctx->picture &&                                       \
      pic < old_ctx->picture + MAX_PICTURE_COUNT) ?                           \
        &new_ctx->picture[pic - old_ctx->picture] : NULL)

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    s->last_picture_ptr    = REBASE_PICTURE(s1->last_picture_ptr,    s, s1);
    s->current_picture_ptr = REBASE_PICTURE(s1->current_picture_ptr, s, s1);
    s->next_picture_ptr    = REBASE_PICTURE(s1->next_picture_ptr,    s, s1);
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    // Error/bug resilience
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    s->next_p_frame_damaged = s1->next_p_frame_damaged;
    s->workaround_bugs      = s1->workaround_bugs;
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    s->padding_bug_score    = s1->padding_bug_score;
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    // MPEG-4 timing info
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    memcpy(&s->last_time_base, &s1->last_time_base,
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           (char *) &s1->pb_field_time + sizeof(s1->pb_field_time) -
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           (char *) &s1->last_time_base);
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    // B-frame info
    s->max_b_frames = s1->max_b_frames;
    s->low_delay    = s1->low_delay;
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    s->droppable    = s1->droppable;
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    // DivX handling (doesn't work)
    s->divx_packed  = s1->divx_packed;

    if (s1->bitstream_buffer) {
        if (s1->bitstream_buffer_size +
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            AV_INPUT_BUFFER_PADDING_SIZE > s->allocated_bitstream_buffer_size) {
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            av_fast_malloc(&s->bitstream_buffer,
                           &s->allocated_bitstream_buffer_size,
                           s1->allocated_bitstream_buffer_size);
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            if (!s->bitstream_buffer) {
                s->bitstream_buffer_size = 0;
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                return AVERROR(ENOMEM);
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            }
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        }
        s->bitstream_buffer_size = s1->bitstream_buffer_size;
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        memcpy(s->bitstream_buffer, s1->bitstream_buffer,
               s1->bitstream_buffer_size);
        memset(s->bitstream_buffer + s->bitstream_buffer_size, 0,
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               AV_INPUT_BUFFER_PADDING_SIZE);
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    }

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    // linesize-dependent scratch buffer allocation
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    if (!s->sc.edge_emu_buffer)
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        if (s1->linesize) {
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            if (ff_mpeg_framesize_alloc(s->avctx, &s->me,
                                        &s->sc, s1->linesize) < 0) {
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                av_log(s->avctx, AV_LOG_ERROR, "Failed to allocate context "
                       "scratch buffers.\n");
                return AVERROR(ENOMEM);
            }
        } else {
            av_log(s->avctx, AV_LOG_ERROR, "Context scratch buffers could not "
                   "be allocated due to unknown size.\n");
        }

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    // MPEG-2/interlacing info
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    memcpy(&s->progressive_sequence, &s1->progressive_sequence,
           (char *) &s1->rtp_mode - (char *) &s1->progressive_sequence);
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    if (!s1->first_field) {
        s->last_pict_type = s1->pict_type;
        if (s1->current_picture_ptr)
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            s->last_lambda_for[s1->pict_type] = s1->current_picture_ptr->f->quality;
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    }

    return 0;
}

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/**
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 * Set the given MpegEncContext to common defaults
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 * (same for encoding and decoding).
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 * The changed fields will not depend upon the
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 * prior state of the MpegEncContext.
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 */
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void ff_mpv_common_defaults(MpegEncContext *s)
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{
    s->y_dc_scale_table      =
    s->c_dc_scale_table      = ff_mpeg1_dc_scale_table;
    s->chroma_qscale_table   = ff_default_chroma_qscale_table;
    s->progressive_frame     = 1;
    s->progressive_sequence  = 1;
    s->picture_structure     = PICT_FRAME;

    s->coded_picture_number  = 0;
    s->picture_number        = 0;
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    s->f_code                = 1;
    s->b_code                = 1;
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    s->slice_context_count   = 1;
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}

/**
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 * Set the given MpegEncContext to defaults for decoding.
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 * the changed fields will not depend upon
 * the prior state of the MpegEncContext.
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 */
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void ff_mpv_decode_defaults(MpegEncContext *s)
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{
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    ff_mpv_common_defaults(s);
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}

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void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx)
{
    s->avctx           = avctx;
    s->width           = avctx->coded_width;
    s->height          = avctx->coded_height;
    s->codec_id        = avctx->codec->id;
    s->workaround_bugs = avctx->workaround_bugs;

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    /* convert fourcc to upper case */
    s->codec_tag          = avpriv_toupper4(avctx->codec_tag);
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}

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/**
 * Initialize and allocates MpegEncContext fields dependent on the resolution.
 */
static int init_context_frame(MpegEncContext *s)
{
    int y_size, c_size, yc_size, i, mb_array_size, mv_table_size, x, y;

    s->mb_width   = (s->width + 15) / 16;
    s->mb_stride  = s->mb_width + 1;
    s->b8_stride  = s->mb_width * 2 + 1;
    mb_array_size = s->mb_height * s->mb_stride;
    mv_table_size = (s->mb_height + 2) * s->mb_stride + 1;

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    /* set default edge pos, will be overridden
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     * in decode_header if needed */
    s->h_edge_pos = s->mb_width * 16;
    s->v_edge_pos = s->mb_height * 16;

    s->mb_num     = s->mb_width * s->mb_height;

    s->block_wrap[0] =
    s->block_wrap[1] =
    s->block_wrap[2] =
    s->block_wrap[3] = s->b8_stride;
    s->block_wrap[4] =
    s->block_wrap[5] = s->mb_stride;

    y_size  = s->b8_stride * (2 * s->mb_height + 1);
    c_size  = s->mb_stride * (s->mb_height + 1);
    yc_size = y_size + 2   * c_size;

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    if (s->mb_height & 1)
        yc_size += 2*s->b8_stride + 2*s->mb_stride;

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    FF_ALLOCZ_OR_GOTO(s->avctx, s->mb_index2xy, (s->mb_num + 1) * sizeof(int),
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                      fail); // error resilience code looks cleaner with this
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    for (y = 0; y < s->mb_height; y++)
        for (x = 0; x < s->mb_width; x++)
            s->mb_index2xy[x + y * s->mb_width] = x + y * s->mb_stride;

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    s->mb_index2xy[s->mb_height * s->mb_width] = (s->mb_height - 1) * s->mb_stride + s->mb_width; // FIXME really needed?
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    if (s->encoding) {
        /* Allocate MV tables */
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        FF_ALLOCZ_OR_GOTO(s->avctx, s->p_mv_table_base,                 mv_table_size * 2 * sizeof(int16_t), fail)
        FF_ALLOCZ_OR_GOTO(s->avctx, s->b_forw_mv_table_base,            mv_table_size * 2 * sizeof(int16_t), fail)
        FF_ALLOCZ_OR_GOTO(s->avctx, s->b_back_mv_table_base,            mv_table_size * 2 * sizeof(int16_t), fail)
        FF_ALLOCZ_OR_GOTO(s->avctx, s->b_bidir_forw_mv_table_base,      mv_table_size * 2 * sizeof(int16_t), fail)
        FF_ALLOCZ_OR_GOTO(s->avctx, s->b_bidir_back_mv_table_base,      mv_table_size * 2 * sizeof(int16_t), fail)
        FF_ALLOCZ_OR_GOTO(s->avctx, s->b_direct_mv_table_base,          mv_table_size * 2 * sizeof(int16_t), fail)
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        s->p_mv_table            = s->p_mv_table_base + s->mb_stride + 1;
        s->b_forw_mv_table       = s->b_forw_mv_table_base + s->mb_stride + 1;
        s->b_back_mv_table       = s->b_back_mv_table_base + s->mb_stride + 1;
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        s->b_bidir_forw_mv_table = s->b_bidir_forw_mv_table_base + s->mb_stride + 1;
        s->b_bidir_back_mv_table = s->b_bidir_back_mv_table_base + s->mb_stride + 1;
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        s->b_direct_mv_table     = s->b_direct_mv_table_base + s->mb_stride + 1;

        /* Allocate MB type table */
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        FF_ALLOCZ_OR_GOTO(s->avctx, s->mb_type, mb_array_size * sizeof(uint16_t), fail) // needed for encoding
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        FF_ALLOCZ_OR_GOTO(s->avctx, s->lambda_table, mb_array_size * sizeof(int), fail)
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        FF_ALLOC_OR_GOTO(s->avctx, s->cplx_tab,
                         mb_array_size * sizeof(float), fail);
        FF_ALLOC_OR_GOTO(s->avctx, s->bits_tab,
                         mb_array_size * sizeof(float), fail);

    }

    if (s->codec_id == AV_CODEC_ID_MPEG4 ||
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        (s->avctx->flags & AV_CODEC_FLAG_INTERLACED_ME)) {
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        /* interlaced direct mode decoding tables */
        for (i = 0; i < 2; i++) {
            int j, k;
            for (j = 0; j < 2; j++) {
                for (k = 0; k < 2; k++) {
                    FF_ALLOCZ_OR_GOTO(s->avctx,
                                      s->b_field_mv_table_base[i][j][k],
                                      mv_table_size * 2 * sizeof(int16_t),
                                      fail);
                    s->b_field_mv_table[i][j][k] = s->b_field_mv_table_base[i][j][k] +
                                                   s->mb_stride + 1;
                }
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                FF_ALLOCZ_OR_GOTO(s->avctx, s->b_field_select_table [i][j], mb_array_size * 2 * sizeof(uint8_t), fail)
                FF_ALLOCZ_OR_GOTO(s->avctx, s->p_field_mv_table_base[i][j], mv_table_size * 2 * sizeof(int16_t), fail)
                s->p_field_mv_table[i][j] = s->p_field_mv_table_base[i][j] + s->mb_stride + 1;
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            }
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            FF_ALLOCZ_OR_GOTO(s->avctx, s->p_field_select_table[i], mb_array_size * 2 * sizeof(uint8_t), fail)
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        }
    }
    if (s->out_format == FMT_H263) {
        /* cbp values */
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        FF_ALLOCZ_OR_GOTO(s->avctx, s->coded_block_base, y_size + (s->mb_height&1)*2*s->b8_stride, fail);
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        s->coded_block = s->coded_block_base + s->b8_stride + 1;

        /* cbp, ac_pred, pred_dir */
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        FF_ALLOCZ_OR_GOTO(s->avctx, s->cbp_table     , mb_array_size * sizeof(uint8_t), fail);
        FF_ALLOCZ_OR_GOTO(s->avctx, s->pred_dir_table, mb_array_size * sizeof(uint8_t), fail);
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    }

    if (s->h263_pred || s->h263_plus || !s->encoding) {
        /* dc values */
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        // MN: we need these for error resilience of intra-frames
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        FF_ALLOCZ_OR_GOTO(s->avctx, s->dc_val_base, yc_size * sizeof(int16_t), fail);
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        s->dc_val[0] = s->dc_val_base + s->b8_stride + 1;
        s->dc_val[1] = s->dc_val_base + y_size + s->mb_stride + 1;
        s->dc_val[2] = s->dc_val[1] + c_size;
        for (i = 0; i < yc_size; i++)
            s->dc_val_base[i] = 1024;
    }

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    /* which mb is an intra block */
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    FF_ALLOCZ_OR_GOTO(s->avctx, s->mbintra_table, mb_array_size, fail);
    memset(s->mbintra_table, 1, mb_array_size);

    /* init macroblock skip table */
    FF_ALLOCZ_OR_GOTO(s->avctx, s->mbskip_table, mb_array_size + 2, fail);
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    // Note the + 1 is for a quicker MPEG-4 slice_end detection
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    return ff_mpeg_er_init(s);
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fail:
    return AVERROR(ENOMEM);
}

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static void clear_context(MpegEncContext *s)
{
    int i, j, k;

    memset(&s->next_picture, 0, sizeof(s->next_picture));
    memset(&s->last_picture, 0, sizeof(s->last_picture));
    memset(&s->current_picture, 0, sizeof(s->current_picture));
    memset(&s->new_picture, 0, sizeof(s->new_picture));

    memset(s->thread_context, 0, sizeof(s->thread_context));

    s->me.map = NULL;
    s->me.score_map = NULL;
    s->dct_error_sum = NULL;
    s->block = NULL;
    s->blocks = NULL;
    memset(s->pblocks, 0, sizeof(s->pblocks));
    s->ac_val_base = NULL;
    s->ac_val[0] =
    s->ac_val[1] =
    s->ac_val[2] =NULL;
    s->sc.edge_emu_buffer = NULL;
    s->me.scratchpad = NULL;
    s->me.temp =
    s->sc.rd_scratchpad =
    s->sc.b_scratchpad =
    s->sc.obmc_scratchpad = NULL;

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    s->bitstream_buffer = NULL;
    s->allocated_bitstream_buffer_size = 0;
    s->picture          = NULL;
    s->mb_type          = NULL;
    s->p_mv_table_base  = NULL;
    s->b_forw_mv_table_base = NULL;
    s->b_back_mv_table_base = NULL;
    s->b_bidir_forw_mv_table_base = NULL;
    s->b_bidir_back_mv_table_base = NULL;
    s->b_direct_mv_table_base = NULL;
    s->p_mv_table            = NULL;
    s->b_forw_mv_table       = NULL;
    s->b_back_mv_table       = NULL;
    s->b_bidir_forw_mv_table = NULL;
    s->b_bidir_back_mv_table = NULL;
    s->b_direct_mv_table     = NULL;
    for (i = 0; i < 2; i++) {
        for (j = 0; j < 2; j++) {
            for (k = 0; k < 2; k++) {
                s->b_field_mv_table_base[i][j][k] = NULL;
                s->b_field_mv_table[i][j][k] = NULL;
            }
            s->b_field_select_table[i][j] = NULL;
            s->p_field_mv_table_base[i][j] = NULL;
            s->p_field_mv_table[i][j] = NULL;
        }
        s->p_field_select_table[i] = NULL;
    }

    s->dc_val_base = NULL;
    s->coded_block_base = NULL;
    s->mbintra_table = NULL;
    s->cbp_table = NULL;
    s->pred_dir_table = NULL;

    s->mbskip_table = NULL;

    s->er.error_status_table = NULL;
    s->er.er_temp_buffer = NULL;
    s->mb_index2xy = NULL;
    s->lambda_table = NULL;

    s->cplx_tab = NULL;
    s->bits_tab = NULL;
}

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/**
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 * init common structure for both encoder and decoder.
 * this assumes that some variables like width/height are already set
 */
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av_cold int ff_mpv_common_init(MpegEncContext *s)
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{
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    int i;
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    int nb_slices = (HAVE_THREADS &&
                     s->avctx->active_thread_type & FF_THREAD_SLICE) ?
                    s->avctx->thread_count : 1;

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    clear_context(s);

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    if (s->encoding && s->avctx->slices)
        nb_slices = s->avctx->slices;
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    if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && !s->progressive_sequence)
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        s->mb_height = (s->height + 31) / 32 * 2;
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    else
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        s->mb_height = (s->height + 15) / 16;
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894
    if (s->avctx->pix_fmt == AV_PIX_FMT_NONE) {
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        av_log(s->avctx, AV_LOG_ERROR,
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               "decoding to AV_PIX_FMT_NONE is not supported.\n");
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        return -1;
    }

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    if (nb_slices > MAX_THREADS || (nb_slices > s->mb_height && s->mb_height)) {
        int max_slices;
        if (s->mb_height)
            max_slices = FFMIN(MAX_THREADS, s->mb_height);
        else
            max_slices = MAX_THREADS;
        av_log(s->avctx, AV_LOG_WARNING, "too many threads/slices (%d),"
               " reducing to %d\n", nb_slices, max_slices);
        nb_slices = max_slices;
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    }

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    if ((s->width || s->height) &&
        av_image_check_size(s->width, s->height, 0, s->avctx))
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        return -1;

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    dct_init(s);
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    /* set chroma shifts */
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    avcodec_get_chroma_sub_sample(s->avctx->pix_fmt,
                                  &s->chroma_x_shift,
                                  &s->chroma_y_shift);
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    FF_ALLOCZ_OR_GOTO(s->avctx, s->picture,
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                      MAX_PICTURE_COUNT * sizeof(Picture), fail);
    for (i = 0; i < MAX_PICTURE_COUNT; i++) {
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        s->picture[i].f = av_frame_alloc();
        if (!s->picture[i].f)
            goto fail;
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    }
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    s->next_picture.f = av_frame_alloc();
    if (!s->next_picture.f)
        goto fail;
    s->last_picture.f = av_frame_alloc();
    if (!s->last_picture.f)
        goto fail;
    s->current_picture.f = av_frame_alloc();
    if (!s->current_picture.f)
        goto fail;
    s->new_picture.f = av_frame_alloc();
    if (!s->new_picture.f)
        goto fail;
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    if (init_context_frame(s))
        goto fail;
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    s->parse_context.state = -1;
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    s->context_initialized = 1;
    memset(s->thread_context, 0, sizeof(s->thread_context));
    s->thread_context[0]   = s;
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//     if (s->width && s->height) {
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    if (nb_slices > 1) {
        for (i = 0; i < nb_slices; i++) {
            if (i) {
                s->thread_context[i] = av_memdup(s, sizeof(MpegEncContext));
                if (!s->thread_context[i])
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                    goto fail;
            }
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            if (init_duplicate_context(s->thread_context[i]) < 0)
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                goto fail;
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            s->thread_context[i]->start_mb_y =
                (s->mb_height * (i) + nb_slices / 2) / nb_slices;
            s->thread_context[i]->end_mb_y   =
                (s->mb_height * (i + 1) + nb_slices / 2) / nb_slices;
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        }
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    } else {
        if (init_duplicate_context(s) < 0)
            goto fail;
        s->start_mb_y = 0;
        s->end_mb_y   = s->mb_height;
    }
    s->slice_context_count = nb_slices;
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//     }
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    return 0;
 fail:
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    ff_mpv_common_end(s);
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    return -1;
}

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/**
 * Frees and resets MpegEncContext fields depending on the resolution.
 * Is used during resolution changes to avoid a full reinitialization of the
 * codec.
 */
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static void free_context_frame(MpegEncContext *s)
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{
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    int i, j, k;
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    av_freep(&s->mb_type);
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    av_freep(&s->p_mv_table_base);
    av_freep(&s->b_forw_mv_table_base);
    av_freep(&s->b_back_mv_table_base);
    av_freep(&s->b_bidir_forw_mv_table_base);
    av_freep(&s->b_bidir_back_mv_table_base);
    av_freep(&s->b_direct_mv_table_base);
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    s->p_mv_table            = NULL;
    s->b_forw_mv_table       = NULL;
    s->b_back_mv_table       = NULL;
    s->b_bidir_forw_mv_table = NULL;
    s->b_bidir_back_mv_table = NULL;
    s->b_direct_mv_table     = NULL;
    for (i = 0; i < 2; i++) {
        for (j = 0; j < 2; j++) {
            for (k = 0; k < 2; k++) {
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                av_freep(&s->b_field_mv_table_base[i][j][k]);
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                s->b_field_mv_table[i][j][k] = NULL;
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            }
            av_freep(&s->b_field_select_table[i][j]);
            av_freep(&s->p_field_mv_table_base[i][j]);
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            s->p_field_mv_table[i][j] = NULL;
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        }
        av_freep(&s->p_field_select_table[i]);
    }
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    av_freep(&s->dc_val_base);
    av_freep(&s->coded_block_base);
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    av_freep(&s->mbintra_table);
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    av_freep(&s->cbp_table);
    av_freep(&s->pred_dir_table);
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    av_freep(&s->mbskip_table);
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    av_freep(&s->er.error_status_table);
    av_freep(&s->er.er_temp_buffer);
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    av_freep(&s->mb_index2xy);
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    av_freep(&s->lambda_table);
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    av_freep(&s->cplx_tab);
    av_freep(&s->bits_tab);

    s->linesize = s->uvlinesize = 0;
}

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int ff_mpv_common_frame_size_change(MpegEncContext *s)
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{
    int i, err = 0;

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    if (!s->context_initialized)
        return AVERROR(EINVAL);

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    if (s->slice_context_count > 1) {
        for (i = 0; i < s->slice_context_count; i++) {
            free_duplicate_context(s->thread_context[i]);
        }
        for (i = 1; i < s->slice_context_count; i++) {
            av_freep(&s->thread_context[i]);
        }
    } else
        free_duplicate_context(s);

1053
    free_context_frame(s);
1054 1055

    if (s->picture)
1056
        for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1057 1058 1059 1060 1061 1062 1063 1064 1065 1066
                s->picture[i].needs_realloc = 1;
        }

    s->last_picture_ptr         =
    s->next_picture_ptr         =
    s->current_picture_ptr      = NULL;

    // init
    if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && !s->progressive_sequence)
        s->mb_height = (s->height + 31) / 32 * 2;
1067
    else
1068 1069 1070
        s->mb_height = (s->height + 15) / 16;

    if ((s->width || s->height) &&
1071
        (err = av_image_check_size(s->width, s->height, 0, s->avctx)) < 0)
1072
        goto fail;
1073 1074 1075 1076

    if ((err = init_context_frame(s)))
        goto fail;

1077
    memset(s->thread_context, 0, sizeof(s->thread_context));
1078 1079 1080 1081 1082 1083
    s->thread_context[0]   = s;

    if (s->width && s->height) {
        int nb_slices = s->slice_context_count;
        if (nb_slices > 1) {
            for (i = 0; i < nb_slices; i++) {
1084
                if (i) {
1085 1086 1087 1088 1089
                    s->thread_context[i] = av_memdup(s, sizeof(MpegEncContext));
                    if (!s->thread_context[i]) {
                        err = AVERROR(ENOMEM);
                        goto fail;
                    }
1090
                }
1091
                if ((err = init_duplicate_context(s->thread_context[i])) < 0)
1092
                    goto fail;
1093 1094 1095 1096
                s->thread_context[i]->start_mb_y =
                    (s->mb_height * (i) + nb_slices / 2) / nb_slices;
                s->thread_context[i]->end_mb_y   =
                    (s->mb_height * (i + 1) + nb_slices / 2) / nb_slices;
1097 1098
            }
        } else {
1099 1100
            err = init_duplicate_context(s);
            if (err < 0)
1101 1102 1103 1104 1105 1106 1107 1108 1109
                goto fail;
            s->start_mb_y = 0;
            s->end_mb_y   = s->mb_height;
        }
        s->slice_context_count = nb_slices;
    }

    return 0;
 fail:
1110
    ff_mpv_common_end(s);
1111 1112 1113
    return err;
}

1114
/* init common structure for both encoder and decoder */
1115
void ff_mpv_common_end(MpegEncContext *s)
1116 1117 1118
{
    int i;

1119 1120 1121
    if (!s)
        return ;

1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137
    if (s->slice_context_count > 1) {
        for (i = 0; i < s->slice_context_count; i++) {
            free_duplicate_context(s->thread_context[i]);
        }
        for (i = 1; i < s->slice_context_count; i++) {
            av_freep(&s->thread_context[i]);
        }
        s->slice_context_count = 1;
    } else free_duplicate_context(s);

    av_freep(&s->parse_context.buffer);
    s->parse_context.buffer_size = 0;

    av_freep(&s->bitstream_buffer);
    s->allocated_bitstream_buffer_size = 0;

1138 1139
    if (s->picture) {
        for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1140
            ff_free_picture_tables(&s->picture[i]);
1141
            ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
1142
            av_frame_free(&s->picture[i].f);
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1143
        }
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    }
1145
    av_freep(&s->picture);
1146
    ff_free_picture_tables(&s->last_picture);
1147
    ff_mpeg_unref_picture(s->avctx, &s->last_picture);
1148
    av_frame_free(&s->last_picture.f);
1149
    ff_free_picture_tables(&s->current_picture);
1150
    ff_mpeg_unref_picture(s->avctx, &s->current_picture);
1151
    av_frame_free(&s->current_picture.f);
1152
    ff_free_picture_tables(&s->next_picture);
1153
    ff_mpeg_unref_picture(s->avctx, &s->next_picture);
1154 1155
    av_frame_free(&s->next_picture.f);
    ff_free_picture_tables(&s->new_picture);
1156
    ff_mpeg_unref_picture(s->avctx, &s->new_picture);
1157
    av_frame_free(&s->new_picture.f);
1158 1159 1160

    free_context_frame(s);

1161 1162 1163 1164 1165
    s->context_initialized      = 0;
    s->last_picture_ptr         =
    s->next_picture_ptr         =
    s->current_picture_ptr      = NULL;
    s->linesize = s->uvlinesize = 0;
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}

1168

1169 1170 1171 1172 1173 1174 1175 1176
static void gray_frame(AVFrame *frame)
{
    int i, h_chroma_shift, v_chroma_shift;

    av_pix_fmt_get_chroma_sub_sample(frame->format, &h_chroma_shift, &v_chroma_shift);

    for(i=0; i<frame->height; i++)
        memset(frame->data[0] + frame->linesize[0]*i, 0x80, frame->width);
1177
    for(i=0; i<AV_CEIL_RSHIFT(frame->height, v_chroma_shift); i++) {
1178
        memset(frame->data[1] + frame->linesize[1]*i,
1179
               0x80, AV_CEIL_RSHIFT(frame->width, h_chroma_shift));
1180
        memset(frame->data[2] + frame->linesize[2]*i,
1181
               0x80, AV_CEIL_RSHIFT(frame->width, h_chroma_shift));
1182 1183 1184
    }
}

1185
/**
1186 1187
 * generic function called after decoding
 * the header and before a frame is decoded.
1188
 */
1189
int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx)
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{
1191
    int i, ret;
1192
    Picture *pic;
1193
    s->mb_skipped = 0;
1194

1195 1196 1197 1198 1199
    if (!ff_thread_can_start_frame(avctx)) {
        av_log(avctx, AV_LOG_ERROR, "Attempt to start a frame outside SETUP state\n");
        return -1;
    }

1200
    /* mark & release old frames */
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    if (s->pict_type != AV_PICTURE_TYPE_B && s->last_picture_ptr &&
        s->last_picture_ptr != s->next_picture_ptr &&
1203
        s->last_picture_ptr->f->buf[0]) {
1204
        ff_mpeg_unref_picture(s->avctx, s->last_picture_ptr);
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1205
    }
1206

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1207
    /* release forgotten pictures */
1208
    /* if (MPEG-124 / H.263) */
1209 1210 1211 1212
    for (i = 0; i < MAX_PICTURE_COUNT; i++) {
        if (&s->picture[i] != s->last_picture_ptr &&
            &s->picture[i] != s->next_picture_ptr &&
            s->picture[i].reference && !s->picture[i].needs_realloc) {
1213
            ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
1214
        }
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1215
    }
1216

1217
    ff_mpeg_unref_picture(s->avctx, &s->current_picture);
1218 1219
    ff_mpeg_unref_picture(s->avctx, &s->last_picture);
    ff_mpeg_unref_picture(s->avctx, &s->next_picture);
1220

1221 1222 1223 1224 1225
    /* release non reference frames */
    for (i = 0; i < MAX_PICTURE_COUNT; i++) {
        if (!s->picture[i].reference)
            ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
    }
1226

1227
    if (s->current_picture_ptr && !s->current_picture_ptr->f->buf[0]) {
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1228
        // we already have an unused image
1229 1230 1231
        // (maybe it was set before reading the header)
        pic = s->current_picture_ptr;
    } else {
1232
        i   = ff_find_unused_picture(s->avctx, s->picture, 0);
1233 1234 1235
        if (i < 0) {
            av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n");
            return i;
1236
        }
1237 1238
        pic = &s->picture[i];
    }
1239

1240 1241 1242 1243 1244
    pic->reference = 0;
    if (!s->droppable) {
        if (s->pict_type != AV_PICTURE_TYPE_B)
            pic->reference = 3;
    }
1245

1246
    pic->f->coded_picture_number = s->coded_picture_number++;
1247

1248
    if (alloc_picture(s, pic, 0) < 0)
1249
        return -1;
1250

1251 1252
    s->current_picture_ptr = pic;
    // FIXME use only the vars from current_pic
1253
    s->current_picture_ptr->f->top_field_first = s->top_field_first;
1254 1255 1256
    if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO ||
        s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
        if (s->picture_structure != PICT_FRAME)
1257
            s->current_picture_ptr->f->top_field_first =
1258
                (s->picture_structure == PICT_TOP_FIELD) == s->first_field;
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1259
    }
1260
    s->current_picture_ptr->f->interlaced_frame = !s->progressive_frame &&
1261 1262
                                                 !s->progressive_sequence;
    s->current_picture_ptr->field_picture      =  s->picture_structure != PICT_FRAME;
1263

1264
    s->current_picture_ptr->f->pict_type = s->pict_type;
1265
    // if (s->avctx->flags && AV_CODEC_FLAG_QSCALE)
1266
    //     s->current_picture_ptr->quality = s->new_picture_ptr->quality;
1267
    s->current_picture_ptr->f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1268

1269
    if ((ret = ff_mpeg_ref_picture(s->avctx, &s->current_picture,
1270 1271
                                   s->current_picture_ptr)) < 0)
        return ret;
1272

1273
    if (s->pict_type != AV_PICTURE_TYPE_B) {
1274
        s->last_picture_ptr = s->next_picture_ptr;
1275
        if (!s->droppable)
1276
            s->next_picture_ptr = s->current_picture_ptr;
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    }
1278
    ff_dlog(s->avctx, "L%p N%p C%p L%p N%p C%p type:%d drop:%d\n",
1279
            s->last_picture_ptr, s->next_picture_ptr,s->current_picture_ptr,
1280 1281 1282
            s->last_picture_ptr    ? s->last_picture_ptr->f->data[0]    : NULL,
            s->next_picture_ptr    ? s->next_picture_ptr->f->data[0]    : NULL,
            s->current_picture_ptr ? s->current_picture_ptr->f->data[0] : NULL,
1283
            s->pict_type, s->droppable);
1284

1285
    if ((!s->last_picture_ptr || !s->last_picture_ptr->f->buf[0]) &&
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        (s->pict_type != AV_PICTURE_TYPE_I ||
         s->picture_structure != PICT_FRAME)) {
        int h_chroma_shift, v_chroma_shift;
        av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt,
                                         &h_chroma_shift, &v_chroma_shift);
1291
        if (s->pict_type == AV_PICTURE_TYPE_B && s->next_picture_ptr && s->next_picture_ptr->f->buf[0])
1292
            av_log(avctx, AV_LOG_DEBUG,
1293 1294
                   "allocating dummy last picture for B frame\n");
        else if (s->pict_type != AV_PICTURE_TYPE_I)
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            av_log(avctx, AV_LOG_ERROR,
                   "warning: first frame is no keyframe\n");
        else if (s->picture_structure != PICT_FRAME)
1298
            av_log(avctx, AV_LOG_DEBUG,
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1299 1300 1301
                   "allocate dummy last picture for field based first keyframe\n");

        /* Allocate a dummy frame */
1302
        i = ff_find_unused_picture(s->avctx, s->picture, 0);
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        if (i < 0) {
            av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n");
            return i;
1306
        }
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        s->last_picture_ptr = &s->picture[i];
1308 1309

        s->last_picture_ptr->reference   = 3;
1310 1311
        s->last_picture_ptr->f->key_frame = 0;
        s->last_picture_ptr->f->pict_type = AV_PICTURE_TYPE_P;
1312

1313
        if (alloc_picture(s, s->last_picture_ptr, 0) < 0) {
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            s->last_picture_ptr = NULL;
            return -1;
1316
        }
1317

1318 1319 1320 1321 1322
        if (!avctx->hwaccel
#if FF_API_CAP_VDPAU
            && !(avctx->codec->capabilities&AV_CODEC_CAP_HWACCEL_VDPAU)
#endif
            ) {
1323
            for(i=0; i<avctx->height; i++)
1324
                memset(s->last_picture_ptr->f->data[0] + s->last_picture_ptr->f->linesize[0]*i,
1325
                       0x80, avctx->width);
1326
            if (s->last_picture_ptr->f->data[2]) {
1327
                for(i=0; i<AV_CEIL_RSHIFT(avctx->height, v_chroma_shift); i++) {
1328
                    memset(s->last_picture_ptr->f->data[1] + s->last_picture_ptr->f->linesize[1]*i,
1329
                        0x80, AV_CEIL_RSHIFT(avctx->width, h_chroma_shift));
1330
                    memset(s->last_picture_ptr->f->data[2] + s->last_picture_ptr->f->linesize[2]*i,
1331
                        0x80, AV_CEIL_RSHIFT(avctx->width, h_chroma_shift));
1332
                }
1333 1334 1335 1336
            }

            if(s->codec_id == AV_CODEC_ID_FLV1 || s->codec_id == AV_CODEC_ID_H263){
                for(i=0; i<avctx->height; i++)
1337
                memset(s->last_picture_ptr->f->data[0] + s->last_picture_ptr->f->linesize[0]*i, 16, avctx->width);
1338
            }
1339
        }
1340

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        ff_thread_report_progress(&s->last_picture_ptr->tf, INT_MAX, 0);
        ff_thread_report_progress(&s->last_picture_ptr->tf, INT_MAX, 1);
    }
1344
    if ((!s->next_picture_ptr || !s->next_picture_ptr->f->buf[0]) &&
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        s->pict_type == AV_PICTURE_TYPE_B) {
        /* Allocate a dummy frame */
1347
        i = ff_find_unused_picture(s->avctx, s->picture, 0);
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        if (i < 0) {
            av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n");
            return i;
1351
        }
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1352
        s->next_picture_ptr = &s->picture[i];
1353 1354

        s->next_picture_ptr->reference   = 3;
1355 1356
        s->next_picture_ptr->f->key_frame = 0;
        s->next_picture_ptr->f->pict_type = AV_PICTURE_TYPE_P;
1357

1358
        if (alloc_picture(s, s->next_picture_ptr, 0) < 0) {
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            s->next_picture_ptr = NULL;
            return -1;
1361
        }
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        ff_thread_report_progress(&s->next_picture_ptr->tf, INT_MAX, 0);
        ff_thread_report_progress(&s->next_picture_ptr->tf, INT_MAX, 1);
    }
1365

1366
#if 0 // BUFREF-FIXME
1367 1368
    memset(s->last_picture.f->data, 0, sizeof(s->last_picture.f->data));
    memset(s->next_picture.f->data, 0, sizeof(s->next_picture.f->data));
1369
#endif
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1370
    if (s->last_picture_ptr) {
1371
        if (s->last_picture_ptr->f->buf[0] &&
1372
            (ret = ff_mpeg_ref_picture(s->avctx, &s->last_picture,
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                                       s->last_picture_ptr)) < 0)
            return ret;
    }
    if (s->next_picture_ptr) {
1377
        if (s->next_picture_ptr->f->buf[0] &&
1378
            (ret = ff_mpeg_ref_picture(s->avctx, &s->next_picture,
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1379 1380 1381
                                       s->next_picture_ptr)) < 0)
            return ret;
    }
1382

1383
    av_assert0(s->pict_type == AV_PICTURE_TYPE_I || (s->last_picture_ptr &&
1384
                                                 s->last_picture_ptr->f->buf[0]));
1385

1386
    if (s->picture_structure!= PICT_FRAME) {
1387
        int i;
1388 1389
        for (i = 0; i < 4; i++) {
            if (s->picture_structure == PICT_BOTTOM_FIELD) {
1390 1391
                s->current_picture.f->data[i] +=
                    s->current_picture.f->linesize[i];
1392
            }
1393 1394 1395
            s->current_picture.f->linesize[i] *= 2;
            s->last_picture.f->linesize[i]    *= 2;
            s->next_picture.f->linesize[i]    *= 2;
1396 1397
        }
    }
1398

1399
    /* set dequantizer, we can't do it during init as
1400 1401
     * it might change for MPEG-4 and we can't do it in the header
     * decode as init is not called for MPEG-4 there yet */
1402
    if (s->mpeg_quant || s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1403 1404
        s->dct_unquantize_intra = s->dct_unquantize_mpeg2_intra;
        s->dct_unquantize_inter = s->dct_unquantize_mpeg2_inter;
1405
    } else if (s->out_format == FMT_H263 || s->out_format == FMT_H261) {
1406 1407
        s->dct_unquantize_intra = s->dct_unquantize_h263_intra;
        s->dct_unquantize_inter = s->dct_unquantize_h263_inter;
1408
    } else {
1409 1410 1411
        s->dct_unquantize_intra = s->dct_unquantize_mpeg1_intra;
        s->dct_unquantize_inter = s->dct_unquantize_mpeg1_inter;
    }
1412

1413 1414 1415 1416
    if (s->avctx->debug & FF_DEBUG_NOMC) {
        gray_frame(s->current_picture_ptr->f);
    }

1417
    return 0;
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1418
}
1419

1420
/* called after a frame has been decoded. */
1421
void ff_mpv_frame_end(MpegEncContext *s)
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{
1423
    emms_c();
1424

1425
    if (s->current_picture.reference)
1426
        ff_thread_report_progress(&s->current_picture_ptr->tf, INT_MAX, 0);
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}

1429

1430
#if FF_API_VISMV
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static int clip_line(int *sx, int *sy, int *ex, int *ey, int maxx)
{
    if(*sx > *ex)
        return clip_line(ex, ey, sx, sy, maxx);

    if (*sx < 0) {
        if (*ex < 0)
            return 1;
        *sy = *ey + (*sy - *ey) * (int64_t)*ex / (*ex - *sx);
        *sx = 0;
    }

    if (*ex > maxx) {
        if (*sx > maxx)
            return 1;
        *ey = *sy + (*ey - *sy) * (int64_t)(maxx - *sx) / (*ex - *sx);
        *ex = maxx;
    }
    return 0;
}


1453
/**
1454
 * Draw a line from (ex, ey) -> (sx, sy).
1455 1456 1457 1458 1459
 * @param w width of the image
 * @param h height of the image
 * @param stride stride/linesize of the image
 * @param color color of the arrow
 */
1460 1461 1462
static void draw_line(uint8_t *buf, int sx, int sy, int ex, int ey,
                      int w, int h, int stride, int color)
{
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1463
    int x, y, fr, f;
1464

1465 1466 1467 1468 1469
    if (clip_line(&sx, &sy, &ex, &ey, w - 1))
        return;
    if (clip_line(&sy, &sx, &ey, &ex, h - 1))
        return;

1470 1471 1472 1473
    sx = av_clip(sx, 0, w - 1);
    sy = av_clip(sy, 0, h - 1);
    ex = av_clip(ex, 0, w - 1);
    ey = av_clip(ey, 0, h - 1);
1474

1475
    buf[sy * stride + sx] += color;
1476

1477 1478
    if (FFABS(ex - sx) > FFABS(ey - sy)) {
        if (sx > ex) {
1479 1480
            FFSWAP(int, sx, ex);
            FFSWAP(int, sy, ey);
1481
        }
1482 1483 1484
        buf += sx + sy * stride;
        ex  -= sx;
        f    = ((ey - sy) << 16) / ex;
1485
        for (x = 0; x <= ex; x++) {
1486 1487 1488
            y  = (x * f) >> 16;
            fr = (x * f) & 0xFFFF;
            buf[y * stride + x]       += (color * (0x10000 - fr)) >> 16;
1489
            if(fr) buf[(y + 1) * stride + x] += (color *            fr ) >> 16;
1490
        }
1491 1492
    } else {
        if (sy > ey) {
1493 1494
            FFSWAP(int, sx, ex);
            FFSWAP(int, sy, ey);
1495
        }
1496 1497 1498
        buf += sx + sy * stride;
        ey  -= sy;
        if (ey)
1499
            f = ((ex - sx) << 16) / ey;
1500 1501
        else
            f = 0;
1502
        for(y= 0; y <= ey; y++){
1503 1504
            x  = (y*f) >> 16;
            fr = (y*f) & 0xFFFF;
1505
            buf[y * stride + x]     += (color * (0x10000 - fr)) >> 16;
1506
            if(fr) buf[y * stride + x + 1] += (color *            fr ) >> 16;
1507 1508 1509 1510 1511
        }
    }
}

/**
1512
 * Draw an arrow from (ex, ey) -> (sx, sy).
1513 1514 1515 1516 1517
 * @param w width of the image
 * @param h height of the image
 * @param stride stride/linesize of the image
 * @param color color of the arrow
 */
1518
static void draw_arrow(uint8_t *buf, int sx, int sy, int ex,
1519
                       int ey, int w, int h, int stride, int color, int tail, int direction)
1520
{
1521 1522
    int dx,dy;

1523 1524 1525 1526 1527
    if (direction) {
        FFSWAP(int, sx, ex);
        FFSWAP(int, sy, ey);
    }

1528 1529 1530 1531
    sx = av_clip(sx, -100, w + 100);
    sy = av_clip(sy, -100, h + 100);
    ex = av_clip(ex, -100, w + 100);
    ey = av_clip(ey, -100, h + 100);
1532

1533 1534
    dx = ex - sx;
    dy = ey - sy;
1535

1536 1537 1538 1539
    if (dx * dx + dy * dy > 3 * 3) {
        int rx =  dx + dy;
        int ry = -dx + dy;
        int length = ff_sqrt((rx * rx + ry * ry) << 8);
1540

1541 1542 1543
        // FIXME subpixel accuracy
        rx = ROUNDED_DIV(rx * 3 << 4, length);
        ry = ROUNDED_DIV(ry * 3 << 4, length);
1544

1545 1546 1547 1548 1549
        if (tail) {
            rx = -rx;
            ry = -ry;
        }

1550 1551 1552 1553 1554
        draw_line(buf, sx, sy, sx + rx, sy + ry, w, h, stride, color);
        draw_line(buf, sx, sy, sx - ry, sy + rx, w, h, stride, color);
    }
    draw_line(buf, sx, sy, ex, ey, w, h, stride, color);
}
1555
#endif
1556

1557 1558
static int add_mb(AVMotionVector *mb, uint32_t mb_type,
                  int dst_x, int dst_y,
1559
                  int motion_x, int motion_y, int motion_scale,
1560 1561 1562 1563
                  int direction)
{
    mb->w = IS_8X8(mb_type) || IS_8X16(mb_type) ? 8 : 16;
    mb->h = IS_8X8(mb_type) || IS_16X8(mb_type) ? 8 : 16;
1564 1565 1566
    mb->motion_x = motion_x;
    mb->motion_y = motion_y;
    mb->motion_scale = motion_scale;
1567 1568
    mb->dst_x = dst_x;
    mb->dst_y = dst_y;
1569 1570
    mb->src_x = dst_x + motion_x / motion_scale;
    mb->src_y = dst_y + motion_y / motion_scale;
1571 1572 1573 1574 1575
    mb->source = direction ? 1 : -1;
    mb->flags = 0; // XXX: does mb_type contain extra information that could be exported here?
    return 1;
}

1576
/**
1577
 * Print debugging info for the given picture.
1578
 */
1579 1580
void ff_print_debug_info2(AVCodecContext *avctx, AVFrame *pict, uint8_t *mbskip_table,
                         uint32_t *mbtype_table, int8_t *qscale_table, int16_t (*motion_val[2])[2],
1581
                         int *low_delay,
1582
                         int mb_width, int mb_height, int mb_stride, int quarter_sample)
1583
{
1584
    if ((avctx->flags2 & AV_CODEC_FLAG2_EXPORT_MVS) && mbtype_table && motion_val[0]) {
1585
        const int shift = 1 + quarter_sample;
1586
        const int scale = 1 << shift;
1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609
        const int mv_sample_log2 = avctx->codec_id == AV_CODEC_ID_H264 || avctx->codec_id == AV_CODEC_ID_SVQ3 ? 2 : 1;
        const int mv_stride      = (mb_width << mv_sample_log2) +
                                   (avctx->codec->id == AV_CODEC_ID_H264 ? 0 : 1);
        int mb_x, mb_y, mbcount = 0;

        /* size is width * height * 2 * 4 where 2 is for directions and 4 is
         * for the maximum number of MB (4 MB in case of IS_8x8) */
        AVMotionVector *mvs = av_malloc_array(mb_width * mb_height, 2 * 4 * sizeof(AVMotionVector));
        if (!mvs)
            return;

        for (mb_y = 0; mb_y < mb_height; mb_y++) {
            for (mb_x = 0; mb_x < mb_width; mb_x++) {
                int i, direction, mb_type = mbtype_table[mb_x + mb_y * mb_stride];
                for (direction = 0; direction < 2; direction++) {
                    if (!USES_LIST(mb_type, direction))
                        continue;
                    if (IS_8X8(mb_type)) {
                        for (i = 0; i < 4; i++) {
                            int sx = mb_x * 16 + 4 + 8 * (i & 1);
                            int sy = mb_y * 16 + 4 + 8 * (i >> 1);
                            int xy = (mb_x * 2 + (i & 1) +
                                      (mb_y * 2 + (i >> 1)) * mv_stride) << (mv_sample_log2 - 1);
1610 1611 1612
                            int mx = motion_val[direction][xy][0];
                            int my = motion_val[direction][xy][1];
                            mbcount += add_mb(mvs + mbcount, mb_type, sx, sy, mx, my, scale, direction);
1613 1614 1615 1616 1617 1618
                        }
                    } else if (IS_16X8(mb_type)) {
                        for (i = 0; i < 2; i++) {
                            int sx = mb_x * 16 + 8;
                            int sy = mb_y * 16 + 4 + 8 * i;
                            int xy = (mb_x * 2 + (mb_y * 2 + i) * mv_stride) << (mv_sample_log2 - 1);
1619 1620
                            int mx = motion_val[direction][xy][0];
                            int my = motion_val[direction][xy][1];
1621 1622 1623 1624

                            if (IS_INTERLACED(mb_type))
                                my *= 2;

1625
                            mbcount += add_mb(mvs + mbcount, mb_type, sx, sy, mx, my, scale, direction);
1626 1627 1628 1629 1630 1631
                        }
                    } else if (IS_8X16(mb_type)) {
                        for (i = 0; i < 2; i++) {
                            int sx = mb_x * 16 + 4 + 8 * i;
                            int sy = mb_y * 16 + 8;
                            int xy = (mb_x * 2 + i + mb_y * 2 * mv_stride) << (mv_sample_log2 - 1);
1632 1633
                            int mx = motion_val[direction][xy][0];
                            int my = motion_val[direction][xy][1];
1634 1635 1636 1637

                            if (IS_INTERLACED(mb_type))
                                my *= 2;

1638
                            mbcount += add_mb(mvs + mbcount, mb_type, sx, sy, mx, my, scale, direction);
1639 1640 1641 1642 1643
                        }
                    } else {
                          int sx = mb_x * 16 + 8;
                          int sy = mb_y * 16 + 8;
                          int xy = (mb_x + mb_y * mv_stride) << mv_sample_log2;
1644 1645 1646
                          int mx = motion_val[direction][xy][0];
                          int my = motion_val[direction][xy][1];
                          mbcount += add_mb(mvs + mbcount, mb_type, sx, sy, mx, my, scale, direction);
1647 1648 1649 1650 1651 1652 1653 1654 1655 1656
                    }
                }
            }
        }

        if (mbcount) {
            AVFrameSideData *sd;

            av_log(avctx, AV_LOG_DEBUG, "Adding %d MVs info to frame %d\n", mbcount, avctx->frame_number);
            sd = av_frame_new_side_data(pict, AV_FRAME_DATA_MOTION_VECTORS, mbcount * sizeof(AVMotionVector));
1657 1658
            if (!sd) {
                av_freep(&mvs);
1659
                return;
1660
            }
1661 1662 1663 1664 1665 1666 1667
            memcpy(sd->data, mvs, mbcount * sizeof(AVMotionVector));
        }

        av_freep(&mvs);
    }

    /* TODO: export all the following to make them accessible for users (and filters) */
1668
    if (avctx->hwaccel || !mbtype_table
1669 1670 1671 1672
#if FF_API_CAP_VDPAU
        || (avctx->codec->capabilities&AV_CODEC_CAP_HWACCEL_VDPAU)
#endif
        )
1673
        return;
1674

1675

1676
    if (avctx->debug & (FF_DEBUG_SKIP | FF_DEBUG_QP | FF_DEBUG_MB_TYPE)) {
1677
        int x,y;
1678

1679
        av_log(avctx, AV_LOG_DEBUG, "New frame, type: %c\n",
1680
               av_get_picture_type_char(pict->pict_type));
1681 1682 1683
        for (y = 0; y < mb_height; y++) {
            for (x = 0; x < mb_width; x++) {
                if (avctx->debug & FF_DEBUG_SKIP) {
1684
                    int count = mbskip_table ? mbskip_table[x + y * mb_stride] : 0;
1685 1686
                    if (count > 9)
                        count = 9;
1687
                    av_log(avctx, AV_LOG_DEBUG, "%1d", count);
1688
                }
1689 1690
                if (avctx->debug & FF_DEBUG_QP) {
                    av_log(avctx, AV_LOG_DEBUG, "%2d",
1691
                           qscale_table[x + y * mb_stride]);
1692
                }
1693
                if (avctx->debug & FF_DEBUG_MB_TYPE) {
1694
                    int mb_type = mbtype_table[x + y * mb_stride];
1695 1696
                    // Type & MV direction
                    if (IS_PCM(mb_type))
1697
                        av_log(avctx, AV_LOG_DEBUG, "P");
1698
                    else if (IS_INTRA(mb_type) && IS_ACPRED(mb_type))
1699
                        av_log(avctx, AV_LOG_DEBUG, "A");
1700
                    else if (IS_INTRA4x4(mb_type))
1701
                        av_log(avctx, AV_LOG_DEBUG, "i");
1702
                    else if (IS_INTRA16x16(mb_type))
1703
                        av_log(avctx, AV_LOG_DEBUG, "I");
1704
                    else if (IS_DIRECT(mb_type) && IS_SKIP(mb_type))
1705
                        av_log(avctx, AV_LOG_DEBUG, "d");
1706
                    else if (IS_DIRECT(mb_type))
1707
                        av_log(avctx, AV_LOG_DEBUG, "D");
1708
                    else if (IS_GMC(mb_type) && IS_SKIP(mb_type))
1709
                        av_log(avctx, AV_LOG_DEBUG, "g");
1710
                    else if (IS_GMC(mb_type))
1711
                        av_log(avctx, AV_LOG_DEBUG, "G");
1712
                    else if (IS_SKIP(mb_type))
1713
                        av_log(avctx, AV_LOG_DEBUG, "S");
1714
                    else if (!USES_LIST(mb_type, 1))
1715
                        av_log(avctx, AV_LOG_DEBUG, ">");
1716
                    else if (!USES_LIST(mb_type, 0))
1717
                        av_log(avctx, AV_LOG_DEBUG, "<");
1718
                    else {
1719
                        av_assert2(USES_LIST(mb_type, 0) && USES_LIST(mb_type, 1));
1720
                        av_log(avctx, AV_LOG_DEBUG, "X");
1721
                    }
1722

1723 1724
                    // segmentation
                    if (IS_8X8(mb_type))
1725
                        av_log(avctx, AV_LOG_DEBUG, "+");
1726
                    else if (IS_16X8(mb_type))
1727
                        av_log(avctx, AV_LOG_DEBUG, "-");
1728
                    else if (IS_8X16(mb_type))
1729
                        av_log(avctx, AV_LOG_DEBUG, "|");
1730
                    else if (IS_INTRA(mb_type) || IS_16X16(mb_type))
1731
                        av_log(avctx, AV_LOG_DEBUG, " ");
1732
                    else
1733
                        av_log(avctx, AV_LOG_DEBUG, "?");
1734 1735


1736
                    if (IS_INTERLACED(mb_type))
1737
                        av_log(avctx, AV_LOG_DEBUG, "=");
1738
                    else
1739
                        av_log(avctx, AV_LOG_DEBUG, " ");
1740 1741
                }
            }
1742
            av_log(avctx, AV_LOG_DEBUG, "\n");
1743 1744
        }
    }
1745

1746 1747
    if ((avctx->debug & (FF_DEBUG_VIS_QP | FF_DEBUG_VIS_MB_TYPE)) ||
        (avctx->debug_mv)) {
1748
        int mb_y;
1749
        int i;
1750
        int h_chroma_shift, v_chroma_shift, block_height;
1751 1752 1753
#if FF_API_VISMV
        const int shift = 1 + quarter_sample;
        uint8_t *ptr;
1754 1755
        const int width          = avctx->width;
        const int height         = avctx->height;
1756
#endif
1757
        const int mv_sample_log2 = avctx->codec_id == AV_CODEC_ID_H264 || avctx->codec_id == AV_CODEC_ID_SVQ3 ? 2 : 1;
1758 1759
        const int mv_stride      = (mb_width << mv_sample_log2) +
                                   (avctx->codec->id == AV_CODEC_ID_H264 ? 0 : 1);
1760

1761 1762
        if (low_delay)
            *low_delay = 0; // needed to see the vectors without trashing the buffers
1763

1764
        avcodec_get_chroma_sub_sample(avctx->pix_fmt, &h_chroma_shift, &v_chroma_shift);
1765

1766 1767
        av_frame_make_writable(pict);

1768
        pict->opaque = NULL;
1769
#if FF_API_VISMV
1770
        ptr          = pict->data[0];
1771
#endif
1772
        block_height = 16 >> v_chroma_shift;
1773

1774
        for (mb_y = 0; mb_y < mb_height; mb_y++) {
1775
            int mb_x;
1776 1777
            for (mb_x = 0; mb_x < mb_width; mb_x++) {
                const int mb_index = mb_x + mb_y * mb_stride;
1778
#if FF_API_VISMV
1779
                if ((avctx->debug_mv) && motion_val[0]) {
1780 1781 1782 1783 1784
                    int type;
                    for (type = 0; type < 3; type++) {
                        int direction = 0;
                        switch (type) {
                        case 0:
1785
                            if ((!(avctx->debug_mv & FF_DEBUG_VIS_MV_P_FOR)) ||
1786
                                (pict->pict_type!= AV_PICTURE_TYPE_P))
1787
                                continue;
1788 1789 1790
                            direction = 0;
                            break;
                        case 1:
1791
                            if ((!(avctx->debug_mv & FF_DEBUG_VIS_MV_B_FOR)) ||
1792
                                (pict->pict_type!= AV_PICTURE_TYPE_B))
1793
                                continue;
1794 1795 1796
                            direction = 0;
                            break;
                        case 2:
1797
                            if ((!(avctx->debug_mv & FF_DEBUG_VIS_MV_B_BACK)) ||
1798
                                (pict->pict_type!= AV_PICTURE_TYPE_B))
1799
                                continue;
1800 1801 1802
                            direction = 1;
                            break;
                        }
1803
                        if (!USES_LIST(mbtype_table[mb_index], direction))
1804 1805
                            continue;

1806
                        if (IS_8X8(mbtype_table[mb_index])) {
1807 1808 1809 1810 1811 1812
                            int i;
                            for (i = 0; i < 4; i++) {
                                int sx = mb_x * 16 + 4 + 8 * (i & 1);
                                int sy = mb_y * 16 + 4 + 8 * (i >> 1);
                                int xy = (mb_x * 2 + (i & 1) +
                                          (mb_y * 2 + (i >> 1)) * mv_stride) << (mv_sample_log2 - 1);
1813 1814
                                int mx = (motion_val[direction][xy][0] >> shift) + sx;
                                int my = (motion_val[direction][xy][1] >> shift) + sy;
1815
                                draw_arrow(ptr, sx, sy, mx, my, width,
1816
                                           height, pict->linesize[0], 100, 0, direction);
1817
                            }
1818
                        } else if (IS_16X8(mbtype_table[mb_index])) {
1819 1820 1821 1822 1823
                            int i;
                            for (i = 0; i < 2; i++) {
                                int sx = mb_x * 16 + 8;
                                int sy = mb_y * 16 + 4 + 8 * i;
                                int xy = (mb_x * 2 + (mb_y * 2 + i) * mv_stride) << (mv_sample_log2 - 1);
1824 1825
                                int mx = (motion_val[direction][xy][0] >> shift);
                                int my = (motion_val[direction][xy][1] >> shift);
1826

1827
                                if (IS_INTERLACED(mbtype_table[mb_index]))
1828 1829
                                    my *= 2;

1830
                                draw_arrow(ptr, sx, sy, mx + sx, my + sy, width,
1831
                                           height, pict->linesize[0], 100, 0, direction);
1832
                            }
1833
                        } else if (IS_8X16(mbtype_table[mb_index])) {
1834 1835 1836 1837 1838
                            int i;
                            for (i = 0; i < 2; i++) {
                                int sx = mb_x * 16 + 4 + 8 * i;
                                int sy = mb_y * 16 + 8;
                                int xy = (mb_x * 2 + i + mb_y * 2 * mv_stride) << (mv_sample_log2 - 1);
1839 1840
                                int mx = motion_val[direction][xy][0] >> shift;
                                int my = motion_val[direction][xy][1] >> shift;
1841

1842
                                if (IS_INTERLACED(mbtype_table[mb_index]))
1843 1844 1845
                                    my *= 2;

                                draw_arrow(ptr, sx, sy, mx + sx, my + sy, width,
1846
                                           height, pict->linesize[0], 100, 0, direction);
1847 1848
                            }
                        } else {
1849 1850 1851
                              int sx= mb_x * 16 + 8;
                              int sy= mb_y * 16 + 8;
                              int xy= (mb_x + mb_y * mv_stride) << mv_sample_log2;
1852 1853
                              int mx= (motion_val[direction][xy][0]>>shift) + sx;
                              int my= (motion_val[direction][xy][1]>>shift) + sy;
1854
                              draw_arrow(ptr, sx, sy, mx, my, width, height, pict->linesize[0], 100, 0, direction);
1855
                        }
1856
                    }
1857
                }
1858
#endif
1859
                if ((avctx->debug & FF_DEBUG_VIS_QP)) {
1860
                    uint64_t c = (qscale_table[mb_index] * 128 / 31) *
1861
                                 0x0101010101010101ULL;
1862
                    int y;
1863 1864 1865 1866 1867 1868 1869
                    for (y = 0; y < block_height; y++) {
                        *(uint64_t *)(pict->data[1] + 8 * mb_x +
                                      (block_height * mb_y + y) *
                                      pict->linesize[1]) = c;
                        *(uint64_t *)(pict->data[2] + 8 * mb_x +
                                      (block_height * mb_y + y) *
                                      pict->linesize[2]) = c;
1870 1871
                    }
                }
1872
                if ((avctx->debug & FF_DEBUG_VIS_MB_TYPE) &&
1873 1874
                    motion_val[0]) {
                    int mb_type = mbtype_table[mb_index];
1875 1876
                    uint64_t u,v;
                    int y;
1877
#define COLOR(theta, r) \
1878 1879
    u = (int)(128 + r * cos(theta * M_PI / 180)); \
    v = (int)(128 + r * sin(theta * M_PI / 180));
1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904


                    u = v = 128;
                    if (IS_PCM(mb_type)) {
                        COLOR(120, 48)
                    } else if ((IS_INTRA(mb_type) && IS_ACPRED(mb_type)) ||
                               IS_INTRA16x16(mb_type)) {
                        COLOR(30, 48)
                    } else if (IS_INTRA4x4(mb_type)) {
                        COLOR(90, 48)
                    } else if (IS_DIRECT(mb_type) && IS_SKIP(mb_type)) {
                        // COLOR(120, 48)
                    } else if (IS_DIRECT(mb_type)) {
                        COLOR(150, 48)
                    } else if (IS_GMC(mb_type) && IS_SKIP(mb_type)) {
                        COLOR(170, 48)
                    } else if (IS_GMC(mb_type)) {
                        COLOR(190, 48)
                    } else if (IS_SKIP(mb_type)) {
                        // COLOR(180, 48)
                    } else if (!USES_LIST(mb_type, 1)) {
                        COLOR(240, 48)
                    } else if (!USES_LIST(mb_type, 0)) {
                        COLOR(0, 48)
                    } else {
1905
                        av_assert2(USES_LIST(mb_type, 0) && USES_LIST(mb_type, 1));
1906 1907 1908
                        COLOR(300,48)
                    }

1909 1910 1911 1912 1913 1914 1915
                    u *= 0x0101010101010101ULL;
                    v *= 0x0101010101010101ULL;
                    for (y = 0; y < block_height; y++) {
                        *(uint64_t *)(pict->data[1] + 8 * mb_x +
                                      (block_height * mb_y + y) * pict->linesize[1]) = u;
                        *(uint64_t *)(pict->data[2] + 8 * mb_x +
                                      (block_height * mb_y + y) * pict->linesize[2]) = v;
1916 1917
                    }

1918 1919 1920 1921 1922 1923
                    // segmentation
                    if (IS_8X8(mb_type) || IS_16X8(mb_type)) {
                        *(uint64_t *)(pict->data[0] + 16 * mb_x + 0 +
                                      (16 * mb_y + 8) * pict->linesize[0]) ^= 0x8080808080808080ULL;
                        *(uint64_t *)(pict->data[0] + 16 * mb_x + 8 +
                                      (16 * mb_y + 8) * pict->linesize[0]) ^= 0x8080808080808080ULL;
1924
                    }
1925 1926 1927 1928
                    if (IS_8X8(mb_type) || IS_8X16(mb_type)) {
                        for (y = 0; y < 16; y++)
                            pict->data[0][16 * mb_x + 8 + (16 * mb_y + y) *
                                          pict->linesize[0]] ^= 0x80;
1929
                    }
1930 1931 1932 1933 1934 1935 1936 1937
                    if (IS_8X8(mb_type) && mv_sample_log2 >= 2) {
                        int dm = 1 << (mv_sample_log2 - 2);
                        for (i = 0; i < 4; i++) {
                            int sx = mb_x * 16 + 8 * (i & 1);
                            int sy = mb_y * 16 + 8 * (i >> 1);
                            int xy = (mb_x * 2 + (i & 1) +
                                     (mb_y * 2 + (i >> 1)) * mv_stride) << (mv_sample_log2 - 1);
                            // FIXME bidir
1938
                            int32_t *mv = (int32_t *) &motion_val[0][xy];
1939 1940 1941 1942 1943 1944 1945
                            if (mv[0] != mv[dm] ||
                                mv[dm * mv_stride] != mv[dm * (mv_stride + 1)])
                                for (y = 0; y < 8; y++)
                                    pict->data[0][sx + 4 + (sy + y) * pict->linesize[0]] ^= 0x80;
                            if (mv[0] != mv[dm * mv_stride] || mv[dm] != mv[dm * (mv_stride + 1)])
                                *(uint64_t *)(pict->data[0] + sx + (sy + 4) *
                                              pict->linesize[0]) ^= 0x8080808080808080ULL;
1946 1947
                        }
                    }
1948

1949
                    if (IS_INTERLACED(mb_type) &&
1950
                        avctx->codec->id == AV_CODEC_ID_H264) {
1951 1952
                        // hmm
                    }
1953
                }
1954 1955
                if (mbskip_table)
                    mbskip_table[mb_index] = 0;
1956 1957 1958
            }
        }
    }
1959 1960
}

1961
void ff_print_debug_info(MpegEncContext *s, Picture *p, AVFrame *pict)
1962
{
1963 1964
    ff_print_debug_info2(s->avctx, pict, s->mbskip_table, p->mb_type,
                         p->qscale_table, p->motion_val, &s->low_delay,
1965
                         s->mb_width, s->mb_height, s->mb_stride, s->quarter_sample);
1966 1967
}

1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979
int ff_mpv_export_qp_table(MpegEncContext *s, AVFrame *f, Picture *p, int qp_type)
{
    AVBufferRef *ref = av_buffer_ref(p->qscale_table_buf);
    int offset = 2*s->mb_stride + 1;
    if(!ref)
        return AVERROR(ENOMEM);
    av_assert0(ref->size >= offset + s->mb_stride * ((f->height+15)/16));
    ref->size -= offset;
    ref->data += offset;
    return av_frame_set_qp_table(f, ref, s->mb_stride, qp_type);
}

1980 1981 1982 1983
static inline int hpel_motion_lowres(MpegEncContext *s,
                                     uint8_t *dest, uint8_t *src,
                                     int field_based, int field_select,
                                     int src_x, int src_y,
1984
                                     int width, int height, ptrdiff_t stride,
1985 1986 1987 1988 1989
                                     int h_edge_pos, int v_edge_pos,
                                     int w, int h, h264_chroma_mc_func *pix_op,
                                     int motion_x, int motion_y)
{
    const int lowres   = s->avctx->lowres;
1990
    const int op_index = FFMIN(lowres, 3);
1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008
    const int s_mask   = (2 << lowres) - 1;
    int emu = 0;
    int sx, sy;

    if (s->quarter_sample) {
        motion_x /= 2;
        motion_y /= 2;
    }

    sx = motion_x & s_mask;
    sy = motion_y & s_mask;
    src_x += motion_x >> lowres + 1;
    src_y += motion_y >> lowres + 1;

    src   += src_y * stride + src_x;

    if ((unsigned)src_x > FFMAX( h_edge_pos - (!!sx) - w,                 0) ||
        (unsigned)src_y > FFMAX((v_edge_pos >> field_based) - (!!sy) - h, 0)) {
2009
        s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, src,
2010 2011 2012 2013
                                 s->linesize, s->linesize,
                                 w + 1, (h + 1) << field_based,
                                 src_x, src_y   << field_based,
                                 h_edge_pos, v_edge_pos);
2014
        src = s->sc.edge_emu_buffer;
2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039
        emu = 1;
    }

    sx = (sx << 2) >> lowres;
    sy = (sy << 2) >> lowres;
    if (field_select)
        src += s->linesize;
    pix_op[op_index](dest, src, stride, h, sx, sy);
    return emu;
}

/* apply one mpeg motion vector to the three components */
static av_always_inline void mpeg_motion_lowres(MpegEncContext *s,
                                                uint8_t *dest_y,
                                                uint8_t *dest_cb,
                                                uint8_t *dest_cr,
                                                int field_based,
                                                int bottom_field,
                                                int field_select,
                                                uint8_t **ref_picture,
                                                h264_chroma_mc_func *pix_op,
                                                int motion_x, int motion_y,
                                                int h, int mb_y)
{
    uint8_t *ptr_y, *ptr_cb, *ptr_cr;
2040 2041
    int mx, my, src_x, src_y, uvsrc_x, uvsrc_y, sx, sy, uvsx, uvsy;
    ptrdiff_t uvlinesize, linesize;
2042
    const int lowres     = s->avctx->lowres;
2043
    const int op_index   = FFMIN(lowres-1+s->chroma_x_shift, 3);
2044 2045 2046 2047
    const int block_s    = 8>>lowres;
    const int s_mask     = (2 << lowres) - 1;
    const int h_edge_pos = s->h_edge_pos >> lowres;
    const int v_edge_pos = s->v_edge_pos >> lowres;
2048 2049
    linesize   = s->current_picture.f->linesize[0] << field_based;
    uvlinesize = s->current_picture.f->linesize[1] << field_based;
2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108

    // FIXME obviously not perfect but qpel will not work in lowres anyway
    if (s->quarter_sample) {
        motion_x /= 2;
        motion_y /= 2;
    }

    if(field_based){
        motion_y += (bottom_field - field_select)*((1 << lowres)-1);
    }

    sx = motion_x & s_mask;
    sy = motion_y & s_mask;
    src_x = s->mb_x * 2 * block_s + (motion_x >> lowres + 1);
    src_y = (mb_y * 2 * block_s >> field_based) + (motion_y >> lowres + 1);

    if (s->out_format == FMT_H263) {
        uvsx    = ((motion_x >> 1) & s_mask) | (sx & 1);
        uvsy    = ((motion_y >> 1) & s_mask) | (sy & 1);
        uvsrc_x = src_x >> 1;
        uvsrc_y = src_y >> 1;
    } else if (s->out_format == FMT_H261) {
        // even chroma mv's are full pel in H261
        mx      = motion_x / 4;
        my      = motion_y / 4;
        uvsx    = (2 * mx) & s_mask;
        uvsy    = (2 * my) & s_mask;
        uvsrc_x = s->mb_x * block_s + (mx >> lowres);
        uvsrc_y =    mb_y * block_s + (my >> lowres);
    } else {
        if(s->chroma_y_shift){
            mx      = motion_x / 2;
            my      = motion_y / 2;
            uvsx    = mx & s_mask;
            uvsy    = my & s_mask;
            uvsrc_x = s->mb_x * block_s                 + (mx >> lowres + 1);
            uvsrc_y =   (mb_y * block_s >> field_based) + (my >> lowres + 1);
        } else {
            if(s->chroma_x_shift){
            //Chroma422
                mx = motion_x / 2;
                uvsx = mx & s_mask;
                uvsy = motion_y & s_mask;
                uvsrc_y = src_y;
                uvsrc_x = s->mb_x*block_s               + (mx >> (lowres+1));
            } else {
            //Chroma444
                uvsx = motion_x & s_mask;
                uvsy = motion_y & s_mask;
                uvsrc_x = src_x;
                uvsrc_y = src_y;
            }
        }
    }

    ptr_y  = ref_picture[0] + src_y   * linesize   + src_x;
    ptr_cb = ref_picture[1] + uvsrc_y * uvlinesize + uvsrc_x;
    ptr_cr = ref_picture[2] + uvsrc_y * uvlinesize + uvsrc_x;

2109
    if ((unsigned) src_x > FFMAX( h_edge_pos - (!!sx) - 2 * block_s,       0) || uvsrc_y<0 ||
2110
        (unsigned) src_y > FFMAX((v_edge_pos >> field_based) - (!!sy) - h, 0)) {
2111
        s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr_y,
2112 2113
                                 linesize >> field_based, linesize >> field_based,
                                 17, 17 + field_based,
2114 2115
                                src_x, src_y << field_based, h_edge_pos,
                                v_edge_pos);
2116
        ptr_y = s->sc.edge_emu_buffer;
2117
        if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
2118
            uint8_t *ubuf = s->sc.edge_emu_buffer + 18 * s->linesize;
2119
            uint8_t *vbuf =ubuf + 10 * s->uvlinesize;
2120 2121
            if (s->workaround_bugs & FF_BUG_IEDGE)
                vbuf -= s->uvlinesize;
2122
            s->vdsp.emulated_edge_mc(ubuf,  ptr_cb,
2123 2124
                                     uvlinesize >> field_based, uvlinesize >> field_based,
                                     9, 9 + field_based,
2125 2126
                                    uvsrc_x, uvsrc_y << field_based,
                                    h_edge_pos >> 1, v_edge_pos >> 1);
2127
            s->vdsp.emulated_edge_mc(vbuf,  ptr_cr,
2128 2129
                                     uvlinesize >> field_based,uvlinesize >> field_based,
                                     9, 9 + field_based,
2130 2131
                                    uvsrc_x, uvsrc_y << field_based,
                                    h_edge_pos >> 1, v_edge_pos >> 1);
2132 2133
            ptr_cb = ubuf;
            ptr_cr = vbuf;
2134 2135 2136
        }
    }

2137
    // FIXME use this for field pix too instead of the obnoxious hack which changes picture.f->data
2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153
    if (bottom_field) {
        dest_y  += s->linesize;
        dest_cb += s->uvlinesize;
        dest_cr += s->uvlinesize;
    }

    if (field_select) {
        ptr_y   += s->linesize;
        ptr_cb  += s->uvlinesize;
        ptr_cr  += s->uvlinesize;
    }

    sx = (sx << 2) >> lowres;
    sy = (sy << 2) >> lowres;
    pix_op[lowres - 1](dest_y, ptr_y, linesize, h, sx, sy);

2154
    if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
2155
        int hc = s->chroma_y_shift ? (h+1-bottom_field)>>1 : h;
2156 2157
        uvsx = (uvsx << 2) >> lowres;
        uvsy = (uvsy << 2) >> lowres;
2158 2159 2160
        if (hc) {
            pix_op[op_index](dest_cb, ptr_cb, uvlinesize, hc, uvsx, uvsy);
            pix_op[op_index](dest_cr, ptr_cr, uvlinesize, hc, uvsx, uvsy);
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        }
    }
    // FIXME h261 lowres loop filter
}

static inline void chroma_4mv_motion_lowres(MpegEncContext *s,
                                            uint8_t *dest_cb, uint8_t *dest_cr,
                                            uint8_t **ref_picture,
                                            h264_chroma_mc_func * pix_op,
                                            int mx, int my)
{
    const int lowres     = s->avctx->lowres;
2173
    const int op_index   = FFMIN(lowres, 3);
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    const int block_s    = 8 >> lowres;
    const int s_mask     = (2 << lowres) - 1;
    const int h_edge_pos = s->h_edge_pos >> lowres + 1;
    const int v_edge_pos = s->v_edge_pos >> lowres + 1;
2178 2179
    int emu = 0, src_x, src_y, sx, sy;
    ptrdiff_t offset;
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    uint8_t *ptr;

    if (s->quarter_sample) {
        mx /= 2;
        my /= 2;
    }

    /* In case of 8X8, we construct a single chroma motion vector
       with a special rounding */
    mx = ff_h263_round_chroma(mx);
    my = ff_h263_round_chroma(my);

    sx = mx & s_mask;
    sy = my & s_mask;
    src_x = s->mb_x * block_s + (mx >> lowres + 1);
    src_y = s->mb_y * block_s + (my >> lowres + 1);

    offset = src_y * s->uvlinesize + src_x;
    ptr = ref_picture[1] + offset;
2199 2200
    if ((unsigned) src_x > FFMAX(h_edge_pos - (!!sx) - block_s, 0) ||
        (unsigned) src_y > FFMAX(v_edge_pos - (!!sy) - block_s, 0)) {
2201
        s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
2202 2203 2204
                                 s->uvlinesize, s->uvlinesize,
                                 9, 9,
                                 src_x, src_y, h_edge_pos, v_edge_pos);
2205
        ptr = s->sc.edge_emu_buffer;
2206
        emu = 1;
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    }
    sx = (sx << 2) >> lowres;
    sy = (sy << 2) >> lowres;
    pix_op[op_index](dest_cb, ptr, s->uvlinesize, block_s, sx, sy);

    ptr = ref_picture[2] + offset;
    if (emu) {
2214
        s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
2215 2216 2217
                                 s->uvlinesize, s->uvlinesize,
                                 9, 9,
                                 src_x, src_y, h_edge_pos, v_edge_pos);
2218
        ptr = s->sc.edge_emu_buffer;
2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273
    }
    pix_op[op_index](dest_cr, ptr, s->uvlinesize, block_s, sx, sy);
}

/**
 * motion compensation of a single macroblock
 * @param s context
 * @param dest_y luma destination pointer
 * @param dest_cb chroma cb/u destination pointer
 * @param dest_cr chroma cr/v destination pointer
 * @param dir direction (0->forward, 1->backward)
 * @param ref_picture array[3] of pointers to the 3 planes of the reference picture
 * @param pix_op halfpel motion compensation function (average or put normally)
 * the motion vectors are taken from s->mv and the MV type from s->mv_type
 */
static inline void MPV_motion_lowres(MpegEncContext *s,
                                     uint8_t *dest_y, uint8_t *dest_cb,
                                     uint8_t *dest_cr,
                                     int dir, uint8_t **ref_picture,
                                     h264_chroma_mc_func *pix_op)
{
    int mx, my;
    int mb_x, mb_y, i;
    const int lowres  = s->avctx->lowres;
    const int block_s = 8 >>lowres;

    mb_x = s->mb_x;
    mb_y = s->mb_y;

    switch (s->mv_type) {
    case MV_TYPE_16X16:
        mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
                           0, 0, 0,
                           ref_picture, pix_op,
                           s->mv[dir][0][0], s->mv[dir][0][1],
                           2 * block_s, mb_y);
        break;
    case MV_TYPE_8X8:
        mx = 0;
        my = 0;
        for (i = 0; i < 4; i++) {
            hpel_motion_lowres(s, dest_y + ((i & 1) + (i >> 1) *
                               s->linesize) * block_s,
                               ref_picture[0], 0, 0,
                               (2 * mb_x + (i & 1)) * block_s,
                               (2 * mb_y + (i >> 1)) * block_s,
                               s->width, s->height, s->linesize,
                               s->h_edge_pos >> lowres, s->v_edge_pos >> lowres,
                               block_s, block_s, pix_op,
                               s->mv[dir][i][0], s->mv[dir][i][1]);

            mx += s->mv[dir][i][0];
            my += s->mv[dir][i][1];
        }

2274
        if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY))
2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294
            chroma_4mv_motion_lowres(s, dest_cb, dest_cr, ref_picture,
                                     pix_op, mx, my);
        break;
    case MV_TYPE_FIELD:
        if (s->picture_structure == PICT_FRAME) {
            /* top field */
            mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
                               1, 0, s->field_select[dir][0],
                               ref_picture, pix_op,
                               s->mv[dir][0][0], s->mv[dir][0][1],
                               block_s, mb_y);
            /* bottom field */
            mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
                               1, 1, s->field_select[dir][1],
                               ref_picture, pix_op,
                               s->mv[dir][1][0], s->mv[dir][1][1],
                               block_s, mb_y);
        } else {
            if (s->picture_structure != s->field_select[dir][0] + 1 &&
                s->pict_type != AV_PICTURE_TYPE_B && !s->first_field) {
2295
                ref_picture = s->current_picture_ptr->f->data;
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            }
            mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
                               0, 0, s->field_select[dir][0],
                               ref_picture, pix_op,
                               s->mv[dir][0][0],
                               s->mv[dir][0][1], 2 * block_s, mb_y >> 1);
            }
        break;
    case MV_TYPE_16X8:
        for (i = 0; i < 2; i++) {
            uint8_t **ref2picture;

            if (s->picture_structure == s->field_select[dir][i] + 1 ||
                s->pict_type == AV_PICTURE_TYPE_B || s->first_field) {
                ref2picture = ref_picture;
            } else {
2313
                ref2picture = s->current_picture_ptr->f->data;
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            }

            mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
                               0, 0, s->field_select[dir][i],
                               ref2picture, pix_op,
                               s->mv[dir][i][0], s->mv[dir][i][1] +
                               2 * block_s * i, block_s, mb_y >> 1);

            dest_y  +=  2 * block_s *  s->linesize;
            dest_cb += (2 * block_s >> s->chroma_y_shift) * s->uvlinesize;
            dest_cr += (2 * block_s >> s->chroma_y_shift) * s->uvlinesize;
        }
        break;
    case MV_TYPE_DMV:
        if (s->picture_structure == PICT_FRAME) {
            for (i = 0; i < 2; i++) {
                int j;
                for (j = 0; j < 2; j++) {
                    mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
                                       1, j, j ^ i,
                                       ref_picture, pix_op,
                                       s->mv[dir][2 * i + j][0],
                                       s->mv[dir][2 * i + j][1],
                                       block_s, mb_y);
                }
2339
                pix_op = s->h264chroma.avg_h264_chroma_pixels_tab;
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            }
        } else {
            for (i = 0; i < 2; i++) {
                mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
                                   0, 0, s->picture_structure != i + 1,
                                   ref_picture, pix_op,
                                   s->mv[dir][2 * i][0],s->mv[dir][2 * i][1],
                                   2 * block_s, mb_y >> 1);

                // after put we make avg of the same block
2350
                pix_op = s->h264chroma.avg_h264_chroma_pixels_tab;
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                // opposite parity is always in the same
                // frame if this is second field
                if (!s->first_field) {
2355
                    ref_picture = s->current_picture_ptr->f->data;
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                }
            }
        }
        break;
    default:
2361
        av_assert2(0);
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    }
}

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/**
 * find the lowest MB row referenced in the MVs
 */
2368
static int lowest_referenced_row(MpegEncContext *s, int dir)
2369 2370 2371 2372
{
    int my_max = INT_MIN, my_min = INT_MAX, qpel_shift = !s->quarter_sample;
    int my, off, i, mvs;

2373 2374
    if (s->picture_structure != PICT_FRAME || s->mcsel)
        goto unhandled;
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    switch (s->mv_type) {
        case MV_TYPE_16X16:
            mvs = 1;
            break;
        case MV_TYPE_16X8:
            mvs = 2;
            break;
        case MV_TYPE_8X8:
            mvs = 4;
            break;
        default:
            goto unhandled;
    }

    for (i = 0; i < mvs; i++) {
2391
        my = s->mv[dir][i][1];
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        my_max = FFMAX(my_max, my);
        my_min = FFMIN(my_min, my);
    }

2396
    off = ((FFMAX(-my_min, my_max)<<qpel_shift) + 63) >> 6;
2397

2398
    return av_clip(s->mb_y + off, 0, s->mb_height - 1);
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unhandled:
    return s->mb_height-1;
}

2403 2404
/* put block[] to dest[] */
static inline void put_dct(MpegEncContext *s,
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2405
                           int16_t *block, int i, uint8_t *dest, int line_size, int qscale)
2406
{
2407
    s->dct_unquantize_intra(s, block, i, qscale);
2408
    s->idsp.idct_put(dest, line_size, block);
2409
}
2410

2411 2412
/* add block[] to dest[] */
static inline void add_dct(MpegEncContext *s,
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                           int16_t *block, int i, uint8_t *dest, int line_size)
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{
    if (s->block_last_index[i] >= 0) {
2416
        s->idsp.idct_add(dest, line_size, block);
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    }
}
2419

2420
static inline void add_dequant_dct(MpegEncContext *s,
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                           int16_t *block, int i, uint8_t *dest, int line_size, int qscale)
2422
{
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    if (s->block_last_index[i] >= 0) {
2424
        s->dct_unquantize_inter(s, block, i, qscale);
2425

2426
        s->idsp.idct_add(dest, line_size, block);
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    }
}

2430
/**
2431
 * Clean dc, ac, coded_block for the current non-intra MB.
2432 2433 2434
 */
void ff_clean_intra_table_entries(MpegEncContext *s)
{
2435
    int wrap = s->b8_stride;
2436
    int xy = s->block_index[0];
2437 2438 2439

    s->dc_val[0][xy           ] =
    s->dc_val[0][xy + 1       ] =
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    s->dc_val[0][xy     + wrap] =
    s->dc_val[0][xy + 1 + wrap] = 1024;
    /* ac pred */
2443 2444
    memset(s->ac_val[0][xy       ], 0, 32 * sizeof(int16_t));
    memset(s->ac_val[0][xy + wrap], 0, 32 * sizeof(int16_t));
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    if (s->msmpeg4_version>=3) {
        s->coded_block[xy           ] =
        s->coded_block[xy + 1       ] =
        s->coded_block[xy     + wrap] =
        s->coded_block[xy + 1 + wrap] = 0;
    }
    /* chroma */
2452 2453
    wrap = s->mb_stride;
    xy = s->mb_x + s->mb_y * wrap;
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    s->dc_val[1][xy] =
    s->dc_val[2][xy] = 1024;
    /* ac pred */
2457 2458
    memset(s->ac_val[1][xy], 0, 16 * sizeof(int16_t));
    memset(s->ac_val[2][xy], 0, 16 * sizeof(int16_t));
2459

2460
    s->mbintra_table[xy]= 0;
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}

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/* generic function called after a macroblock has been parsed by the
   decoder or after it has been encoded by the encoder.

   Important variables used:
   s->mb_intra : true if intra macroblock
   s->mv_dir   : motion vector direction
   s->mv_type  : motion vector type
   s->mv       : motion vector
   s->interlaced_dct : true if interlaced dct used (mpeg2)
 */
2473
static av_always_inline
2474
void mpv_decode_mb_internal(MpegEncContext *s, int16_t block[12][64],
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                            int lowres_flag, int is_mpeg12)
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{
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    const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
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    if (CONFIG_XVMC &&
        s->avctx->hwaccel && s->avctx->hwaccel->decode_mb) {
        s->avctx->hwaccel->decode_mb(s);//xvmc uses pblocks
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        return;
    }
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    if(s->avctx->debug&FF_DEBUG_DCT_COEFF) {
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       /* print DCT coefficients */
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       int i,j;
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       av_log(s->avctx, AV_LOG_DEBUG, "DCT coeffs of MB at %dx%d:\n", s->mb_x, s->mb_y);
       for(i=0; i<6; i++){
           for(j=0; j<64; j++){
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               av_log(s->avctx, AV_LOG_DEBUG, "%5d",
                      block[i][s->idsp.idct_permutation[j]]);
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           }
           av_log(s->avctx, AV_LOG_DEBUG, "\n");
       }
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    }

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    s->current_picture.qscale_table[mb_xy] = s->qscale;
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    /* update DC predictors for P macroblocks */
    if (!s->mb_intra) {
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        if (!is_mpeg12 && (s->h263_pred || s->h263_aic)) {
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            if(s->mbintra_table[mb_xy])
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                ff_clean_intra_table_entries(s);
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        } else {
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            s->last_dc[0] =
            s->last_dc[1] =
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            s->last_dc[2] = 128 << s->intra_dc_precision;
        }
    }
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    else if (!is_mpeg12 && (s->h263_pred || s->h263_aic))
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        s->mbintra_table[mb_xy]=1;
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    if ((s->avctx->flags & AV_CODEC_FLAG_PSNR) || s->frame_skip_threshold || s->frame_skip_factor ||
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        !(s->encoding && (s->intra_only || s->pict_type == AV_PICTURE_TYPE_B) &&
          s->avctx->mb_decision != FF_MB_DECISION_RD)) { // FIXME precalc
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        uint8_t *dest_y, *dest_cb, *dest_cr;
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        int dct_linesize, dct_offset;
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        op_pixels_func (*op_pix)[4];
        qpel_mc_func (*op_qpix)[16];
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        const int linesize   = s->current_picture.f->linesize[0]; //not s->linesize as this would be wrong for field pics
        const int uvlinesize = s->current_picture.f->linesize[1];
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        const int readable= s->pict_type != AV_PICTURE_TYPE_B || s->encoding || s->avctx->draw_horiz_band || lowres_flag;
        const int block_size= lowres_flag ? 8>>s->avctx->lowres : 8;
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        /* avoid copy if macroblock skipped in last frame too */
        /* skip only during decoding as we might trash the buffers during encoding a bit */
        if(!s->encoding){
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            uint8_t *mbskip_ptr = &s->mbskip_table[mb_xy];
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            if (s->mb_skipped) {
                s->mb_skipped= 0;
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                av_assert2(s->pict_type!=AV_PICTURE_TYPE_I);
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                *mbskip_ptr = 1;
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            } else if(!s->current_picture.reference) {
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                *mbskip_ptr = 1;
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            } else{
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                *mbskip_ptr = 0; /* not skipped */
            }
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        }
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        dct_linesize = linesize << s->interlaced_dct;
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        dct_offset   = s->interlaced_dct ? linesize : linesize * block_size;
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        if(readable){
            dest_y=  s->dest[0];
            dest_cb= s->dest[1];
            dest_cr= s->dest[2];
        }else{
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            dest_y = s->sc.b_scratchpad;
            dest_cb= s->sc.b_scratchpad+16*linesize;
            dest_cr= s->sc.b_scratchpad+32*linesize;
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        }
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        if (!s->mb_intra) {
            /* motion handling */
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            /* decoding or more than one mb_type (MC was already done otherwise) */
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            if(!s->encoding){
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                if(HAVE_THREADS && s->avctx->active_thread_type&FF_THREAD_FRAME) {
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                    if (s->mv_dir & MV_DIR_FORWARD) {
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                        ff_thread_await_progress(&s->last_picture_ptr->tf,
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                                                 lowest_referenced_row(s, 0),
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                                                 0);
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                    }
                    if (s->mv_dir & MV_DIR_BACKWARD) {
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                        ff_thread_await_progress(&s->next_picture_ptr->tf,
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                                                 lowest_referenced_row(s, 1),
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                                                 0);
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                    }
                }

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                if(lowres_flag){
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                    h264_chroma_mc_func *op_pix = s->h264chroma.put_h264_chroma_pixels_tab;
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                    if (s->mv_dir & MV_DIR_FORWARD) {
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                        MPV_motion_lowres(s, dest_y, dest_cb, dest_cr, 0, s->last_picture.f->data, op_pix);
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                        op_pix = s->h264chroma.avg_h264_chroma_pixels_tab;
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                    }
                    if (s->mv_dir & MV_DIR_BACKWARD) {
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                        MPV_motion_lowres(s, dest_y, dest_cb, dest_cr, 1, s->next_picture.f->data, op_pix);
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                    }
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                }else{
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                    op_qpix = s->me.qpel_put;
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                    if ((!s->no_rounding) || s->pict_type==AV_PICTURE_TYPE_B){
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                        op_pix = s->hdsp.put_pixels_tab;
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                    }else{
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                        op_pix = s->hdsp.put_no_rnd_pixels_tab;
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                    }
                    if (s->mv_dir & MV_DIR_FORWARD) {
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                        ff_mpv_motion(s, dest_y, dest_cb, dest_cr, 0, s->last_picture.f->data, op_pix, op_qpix);
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                        op_pix = s->hdsp.avg_pixels_tab;
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                        op_qpix= s->me.qpel_avg;
                    }
                    if (s->mv_dir & MV_DIR_BACKWARD) {
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                        ff_mpv_motion(s, dest_y, dest_cb, dest_cr, 1, s->next_picture.f->data, op_pix, op_qpix);
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                    }
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                }
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            }

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            /* skip dequant / idct if we are really late ;) */
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            if(s->avctx->skip_idct){
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                if(  (s->avctx->skip_idct >= AVDISCARD_NONREF && s->pict_type == AV_PICTURE_TYPE_B)
                   ||(s->avctx->skip_idct >= AVDISCARD_NONKEY && s->pict_type != AV_PICTURE_TYPE_I)
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                   || s->avctx->skip_idct >= AVDISCARD_ALL)
                    goto skip_idct;
            }
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            /* add dct residue */
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            if(s->encoding || !(   s->msmpeg4_version || s->codec_id==AV_CODEC_ID_MPEG1VIDEO || s->codec_id==AV_CODEC_ID_MPEG2VIDEO
                                || (s->codec_id==AV_CODEC_ID_MPEG4 && !s->mpeg_quant))){
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                add_dequant_dct(s, block[0], 0, dest_y                          , dct_linesize, s->qscale);
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                add_dequant_dct(s, block[1], 1, dest_y              + block_size, dct_linesize, s->qscale);
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                add_dequant_dct(s, block[2], 2, dest_y + dct_offset             , dct_linesize, s->qscale);
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                add_dequant_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize, s->qscale);
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                if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
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                    if (s->chroma_y_shift){
                        add_dequant_dct(s, block[4], 4, dest_cb, uvlinesize, s->chroma_qscale);
                        add_dequant_dct(s, block[5], 5, dest_cr, uvlinesize, s->chroma_qscale);
                    }else{
                        dct_linesize >>= 1;
                        dct_offset >>=1;
                        add_dequant_dct(s, block[4], 4, dest_cb,              dct_linesize, s->chroma_qscale);
                        add_dequant_dct(s, block[5], 5, dest_cr,              dct_linesize, s->chroma_qscale);
                        add_dequant_dct(s, block[6], 6, dest_cb + dct_offset, dct_linesize, s->chroma_qscale);
                        add_dequant_dct(s, block[7], 7, dest_cr + dct_offset, dct_linesize, s->chroma_qscale);
                    }
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                }
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            } else if(is_mpeg12 || (s->codec_id != AV_CODEC_ID_WMV2)){
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                add_dct(s, block[0], 0, dest_y                          , dct_linesize);
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                add_dct(s, block[1], 1, dest_y              + block_size, dct_linesize);
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                add_dct(s, block[2], 2, dest_y + dct_offset             , dct_linesize);
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                add_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize);
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                if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
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                    if(s->chroma_y_shift){//Chroma420
                        add_dct(s, block[4], 4, dest_cb, uvlinesize);
                        add_dct(s, block[5], 5, dest_cr, uvlinesize);
                    }else{
                        //chroma422
                        dct_linesize = uvlinesize << s->interlaced_dct;
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                        dct_offset   = s->interlaced_dct ? uvlinesize : uvlinesize*block_size;
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                        add_dct(s, block[4], 4, dest_cb, dct_linesize);
                        add_dct(s, block[5], 5, dest_cr, dct_linesize);
                        add_dct(s, block[6], 6, dest_cb+dct_offset, dct_linesize);
                        add_dct(s, block[7], 7, dest_cr+dct_offset, dct_linesize);
                        if(!s->chroma_x_shift){//Chroma444
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                            add_dct(s, block[8], 8, dest_cb+block_size, dct_linesize);
                            add_dct(s, block[9], 9, dest_cr+block_size, dct_linesize);
                            add_dct(s, block[10], 10, dest_cb+block_size+dct_offset, dct_linesize);
                            add_dct(s, block[11], 11, dest_cr+block_size+dct_offset, dct_linesize);
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                        }
                    }
                }//fi gray
            }
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            else if (CONFIG_WMV2_DECODER || CONFIG_WMV2_ENCODER) {
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                ff_wmv2_add_mb(s, block, dest_y, dest_cb, dest_cr);
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            }
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        } else {
            /* dct only in intra block */
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            if(s->encoding || !(s->codec_id==AV_CODEC_ID_MPEG1VIDEO || s->codec_id==AV_CODEC_ID_MPEG2VIDEO)){
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                put_dct(s, block[0], 0, dest_y                          , dct_linesize, s->qscale);
                put_dct(s, block[1], 1, dest_y              + block_size, dct_linesize, s->qscale);
                put_dct(s, block[2], 2, dest_y + dct_offset             , dct_linesize, s->qscale);
                put_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize, s->qscale);
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                if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
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                    if(s->chroma_y_shift){
                        put_dct(s, block[4], 4, dest_cb, uvlinesize, s->chroma_qscale);
                        put_dct(s, block[5], 5, dest_cr, uvlinesize, s->chroma_qscale);
                    }else{
                        dct_offset >>=1;
                        dct_linesize >>=1;
                        put_dct(s, block[4], 4, dest_cb,              dct_linesize, s->chroma_qscale);
                        put_dct(s, block[5], 5, dest_cr,              dct_linesize, s->chroma_qscale);
                        put_dct(s, block[6], 6, dest_cb + dct_offset, dct_linesize, s->chroma_qscale);
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                        put_dct(s, block[7], 7, dest_cr + dct_offset, dct_linesize, s->chroma_qscale);
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                    }
                }
            }else{
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                s->idsp.idct_put(dest_y,                           dct_linesize, block[0]);
                s->idsp.idct_put(dest_y              + block_size, dct_linesize, block[1]);
                s->idsp.idct_put(dest_y + dct_offset,              dct_linesize, block[2]);
                s->idsp.idct_put(dest_y + dct_offset + block_size, dct_linesize, block[3]);
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                if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
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                    if(s->chroma_y_shift){
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                        s->idsp.idct_put(dest_cb, uvlinesize, block[4]);
                        s->idsp.idct_put(dest_cr, uvlinesize, block[5]);
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                    }else{
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                        dct_linesize = uvlinesize << s->interlaced_dct;
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                        dct_offset   = s->interlaced_dct ? uvlinesize : uvlinesize*block_size;
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                        s->idsp.idct_put(dest_cb,              dct_linesize, block[4]);
                        s->idsp.idct_put(dest_cr,              dct_linesize, block[5]);
                        s->idsp.idct_put(dest_cb + dct_offset, dct_linesize, block[6]);
                        s->idsp.idct_put(dest_cr + dct_offset, dct_linesize, block[7]);
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                        if(!s->chroma_x_shift){//Chroma444
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                            s->idsp.idct_put(dest_cb + block_size,              dct_linesize, block[8]);
                            s->idsp.idct_put(dest_cr + block_size,              dct_linesize, block[9]);
                            s->idsp.idct_put(dest_cb + block_size + dct_offset, dct_linesize, block[10]);
                            s->idsp.idct_put(dest_cr + block_size + dct_offset, dct_linesize, block[11]);
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                        }
                    }
                }//gray
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            }
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        }
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skip_idct:
        if(!readable){
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            s->hdsp.put_pixels_tab[0][0](s->dest[0], dest_y ,   linesize,16);
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            if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
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                s->hdsp.put_pixels_tab[s->chroma_x_shift][0](s->dest[1], dest_cb, uvlinesize,16 >> s->chroma_y_shift);
                s->hdsp.put_pixels_tab[s->chroma_x_shift][0](s->dest[2], dest_cr, uvlinesize,16 >> s->chroma_y_shift);
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            }
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        }
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    }
}

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void ff_mpv_decode_mb(MpegEncContext *s, int16_t block[12][64])
{
2724
#if !CONFIG_SMALL
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    if(s->out_format == FMT_MPEG1) {
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        if(s->avctx->lowres) mpv_decode_mb_internal(s, block, 1, 1);
        else                 mpv_decode_mb_internal(s, block, 0, 1);
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    } else
#endif
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    if(s->avctx->lowres) mpv_decode_mb_internal(s, block, 1, 0);
    else                  mpv_decode_mb_internal(s, block, 0, 0);
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}

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void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h)
{
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    ff_draw_horiz_band(s->avctx, s->current_picture_ptr->f,
                       s->last_picture_ptr ? s->last_picture_ptr->f : NULL, y, h, s->picture_structure,
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                       s->first_field, s->low_delay);
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}

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void ff_init_block_index(MpegEncContext *s){ //FIXME maybe rename
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    const int linesize   = s->current_picture.f->linesize[0]; //not s->linesize as this would be wrong for field pics
    const int uvlinesize = s->current_picture.f->linesize[1];
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    const int mb_size= 4 - s->avctx->lowres;
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    s->block_index[0]= s->b8_stride*(s->mb_y*2    ) - 2 + s->mb_x*2;
    s->block_index[1]= s->b8_stride*(s->mb_y*2    ) - 1 + s->mb_x*2;
    s->block_index[2]= s->b8_stride*(s->mb_y*2 + 1) - 2 + s->mb_x*2;
    s->block_index[3]= s->b8_stride*(s->mb_y*2 + 1) - 1 + s->mb_x*2;
    s->block_index[4]= s->mb_stride*(s->mb_y + 1)                + s->b8_stride*s->mb_height*2 + s->mb_x - 1;
    s->block_index[5]= s->mb_stride*(s->mb_y + s->mb_height + 2) + s->b8_stride*s->mb_height*2 + s->mb_x - 1;
    //block_index is not used by mpeg2, so it is not affected by chroma_format
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    s->dest[0] = s->current_picture.f->data[0] + (int)((s->mb_x - 1U) <<  mb_size);
    s->dest[1] = s->current_picture.f->data[1] + (int)((s->mb_x - 1U) << (mb_size - s->chroma_x_shift));
    s->dest[2] = s->current_picture.f->data[2] + (int)((s->mb_x - 1U) << (mb_size - s->chroma_x_shift));
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    if(!(s->pict_type==AV_PICTURE_TYPE_B && s->avctx->draw_horiz_band && s->picture_structure==PICT_FRAME))
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    {
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        if(s->picture_structure==PICT_FRAME){
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        s->dest[0] += s->mb_y *   linesize << mb_size;
        s->dest[1] += s->mb_y * uvlinesize << (mb_size - s->chroma_y_shift);
        s->dest[2] += s->mb_y * uvlinesize << (mb_size - s->chroma_y_shift);
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        }else{
            s->dest[0] += (s->mb_y>>1) *   linesize << mb_size;
            s->dest[1] += (s->mb_y>>1) * uvlinesize << (mb_size - s->chroma_y_shift);
            s->dest[2] += (s->mb_y>>1) * uvlinesize << (mb_size - s->chroma_y_shift);
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            av_assert1((s->mb_y&1) == (s->picture_structure == PICT_BOTTOM_FIELD));
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        }
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    }
}
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void ff_mpeg_flush(AVCodecContext *avctx){
    int i;
    MpegEncContext *s = avctx->priv_data;
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2777
    if (!s || !s->picture)
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        return;
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    for (i = 0; i < MAX_PICTURE_COUNT; i++)
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        ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
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    s->current_picture_ptr = s->last_picture_ptr = s->next_picture_ptr = NULL;
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    ff_mpeg_unref_picture(s->avctx, &s->current_picture);
    ff_mpeg_unref_picture(s->avctx, &s->last_picture);
    ff_mpeg_unref_picture(s->avctx, &s->next_picture);
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    s->mb_x= s->mb_y= 0;
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    s->closed_gop= 0;
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    s->parse_context.state= -1;
    s->parse_context.frame_start_found= 0;
    s->parse_context.overread= 0;
    s->parse_context.overread_index= 0;
    s->parse_context.index= 0;
    s->parse_context.last_index= 0;
    s->bitstream_buffer_size=0;
    s->pp_time=0;
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}

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/**
 * set qscale and update qscale dependent variables.
 */
void ff_set_qscale(MpegEncContext * s, int qscale)
{
    if (qscale < 1)
        qscale = 1;
    else if (qscale > 31)
        qscale = 31;

    s->qscale = qscale;
    s->chroma_qscale= s->chroma_qscale_table[qscale];

    s->y_dc_scale= s->y_dc_scale_table[ qscale ];
    s->c_dc_scale= s->c_dc_scale_table[ s->chroma_qscale ];
}
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void ff_mpv_report_decode_progress(MpegEncContext *s)
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{
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    if (s->pict_type != AV_PICTURE_TYPE_B && !s->partitioned_frame && !s->er.error_occurred)
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        ff_thread_report_progress(&s->current_picture_ptr->tf, s->mb_y, 0);
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}