h264_slice.c 92.9 KB
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/*
 * H.26L/H.264/AVC/JVT/14496-10/... decoder
 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
 *
 * This file is part of Libav.
 *
 * Libav is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * Libav is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with Libav; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
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 * H.264 / AVC / MPEG-4 part10 codec.
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 * @author Michael Niedermayer <michaelni@gmx.at>
 */

#include "libavutil/avassert.h"
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#include "libavutil/display.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/stereo3d.h"
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#include "libavutil/timer.h"
#include "internal.h"
#include "cabac.h"
#include "cabac_functions.h"
#include "error_resilience.h"
#include "avcodec.h"
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#include "h264.h"
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#include "h264dec.h"
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#include "h264data.h"
#include "h264chroma.h"
#include "h264_mvpred.h"
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#include "h264_ps.h"
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#include "golomb.h"
#include "mathops.h"
#include "mpegutils.h"
#include "rectangle.h"
#include "thread.h"

static const uint8_t field_scan[16] = {
    0 + 0 * 4, 0 + 1 * 4, 1 + 0 * 4, 0 + 2 * 4,
    0 + 3 * 4, 1 + 1 * 4, 1 + 2 * 4, 1 + 3 * 4,
    2 + 0 * 4, 2 + 1 * 4, 2 + 2 * 4, 2 + 3 * 4,
    3 + 0 * 4, 3 + 1 * 4, 3 + 2 * 4, 3 + 3 * 4,
};

static const uint8_t field_scan8x8[64] = {
    0 + 0 * 8, 0 + 1 * 8, 0 + 2 * 8, 1 + 0 * 8,
    1 + 1 * 8, 0 + 3 * 8, 0 + 4 * 8, 1 + 2 * 8,
    2 + 0 * 8, 1 + 3 * 8, 0 + 5 * 8, 0 + 6 * 8,
    0 + 7 * 8, 1 + 4 * 8, 2 + 1 * 8, 3 + 0 * 8,
    2 + 2 * 8, 1 + 5 * 8, 1 + 6 * 8, 1 + 7 * 8,
    2 + 3 * 8, 3 + 1 * 8, 4 + 0 * 8, 3 + 2 * 8,
    2 + 4 * 8, 2 + 5 * 8, 2 + 6 * 8, 2 + 7 * 8,
    3 + 3 * 8, 4 + 1 * 8, 5 + 0 * 8, 4 + 2 * 8,
    3 + 4 * 8, 3 + 5 * 8, 3 + 6 * 8, 3 + 7 * 8,
    4 + 3 * 8, 5 + 1 * 8, 6 + 0 * 8, 5 + 2 * 8,
    4 + 4 * 8, 4 + 5 * 8, 4 + 6 * 8, 4 + 7 * 8,
    5 + 3 * 8, 6 + 1 * 8, 6 + 2 * 8, 5 + 4 * 8,
    5 + 5 * 8, 5 + 6 * 8, 5 + 7 * 8, 6 + 3 * 8,
    7 + 0 * 8, 7 + 1 * 8, 6 + 4 * 8, 6 + 5 * 8,
    6 + 6 * 8, 6 + 7 * 8, 7 + 2 * 8, 7 + 3 * 8,
    7 + 4 * 8, 7 + 5 * 8, 7 + 6 * 8, 7 + 7 * 8,
};

static const uint8_t field_scan8x8_cavlc[64] = {
    0 + 0 * 8, 1 + 1 * 8, 2 + 0 * 8, 0 + 7 * 8,
    2 + 2 * 8, 2 + 3 * 8, 2 + 4 * 8, 3 + 3 * 8,
    3 + 4 * 8, 4 + 3 * 8, 4 + 4 * 8, 5 + 3 * 8,
    5 + 5 * 8, 7 + 0 * 8, 6 + 6 * 8, 7 + 4 * 8,
    0 + 1 * 8, 0 + 3 * 8, 1 + 3 * 8, 1 + 4 * 8,
    1 + 5 * 8, 3 + 1 * 8, 2 + 5 * 8, 4 + 1 * 8,
    3 + 5 * 8, 5 + 1 * 8, 4 + 5 * 8, 6 + 1 * 8,
    5 + 6 * 8, 7 + 1 * 8, 6 + 7 * 8, 7 + 5 * 8,
    0 + 2 * 8, 0 + 4 * 8, 0 + 5 * 8, 2 + 1 * 8,
    1 + 6 * 8, 4 + 0 * 8, 2 + 6 * 8, 5 + 0 * 8,
    3 + 6 * 8, 6 + 0 * 8, 4 + 6 * 8, 6 + 2 * 8,
    5 + 7 * 8, 6 + 4 * 8, 7 + 2 * 8, 7 + 6 * 8,
    1 + 0 * 8, 1 + 2 * 8, 0 + 6 * 8, 3 + 0 * 8,
    1 + 7 * 8, 3 + 2 * 8, 2 + 7 * 8, 4 + 2 * 8,
    3 + 7 * 8, 5 + 2 * 8, 4 + 7 * 8, 5 + 4 * 8,
    6 + 3 * 8, 6 + 5 * 8, 7 + 3 * 8, 7 + 7 * 8,
};

// zigzag_scan8x8_cavlc[i] = zigzag_scan8x8[(i/4) + 16*(i%4)]
static const uint8_t zigzag_scan8x8_cavlc[64] = {
    0 + 0 * 8, 1 + 1 * 8, 1 + 2 * 8, 2 + 2 * 8,
    4 + 1 * 8, 0 + 5 * 8, 3 + 3 * 8, 7 + 0 * 8,
    3 + 4 * 8, 1 + 7 * 8, 5 + 3 * 8, 6 + 3 * 8,
    2 + 7 * 8, 6 + 4 * 8, 5 + 6 * 8, 7 + 5 * 8,
    1 + 0 * 8, 2 + 0 * 8, 0 + 3 * 8, 3 + 1 * 8,
    3 + 2 * 8, 0 + 6 * 8, 4 + 2 * 8, 6 + 1 * 8,
    2 + 5 * 8, 2 + 6 * 8, 6 + 2 * 8, 5 + 4 * 8,
    3 + 7 * 8, 7 + 3 * 8, 4 + 7 * 8, 7 + 6 * 8,
    0 + 1 * 8, 3 + 0 * 8, 0 + 4 * 8, 4 + 0 * 8,
    2 + 3 * 8, 1 + 5 * 8, 5 + 1 * 8, 5 + 2 * 8,
    1 + 6 * 8, 3 + 5 * 8, 7 + 1 * 8, 4 + 5 * 8,
    4 + 6 * 8, 7 + 4 * 8, 5 + 7 * 8, 6 + 7 * 8,
    0 + 2 * 8, 2 + 1 * 8, 1 + 3 * 8, 5 + 0 * 8,
    1 + 4 * 8, 2 + 4 * 8, 6 + 0 * 8, 4 + 3 * 8,
    0 + 7 * 8, 4 + 4 * 8, 7 + 2 * 8, 3 + 6 * 8,
    5 + 5 * 8, 6 + 5 * 8, 6 + 6 * 8, 7 + 7 * 8,
};

static void release_unused_pictures(H264Context *h, int remove_current)
{
    int i;

    /* release non reference frames */
    for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
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        if (h->DPB[i].f->buf[0] && !h->DPB[i].reference &&
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            (remove_current || &h->DPB[i] != h->cur_pic_ptr)) {
            ff_h264_unref_picture(h, &h->DPB[i]);
        }
    }
}

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static int alloc_scratch_buffers(H264SliceContext *sl, int linesize)
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{
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    const H264Context *h = sl->h264;
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    int alloc_size = FFALIGN(FFABS(linesize) + 32, 32);

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    av_fast_malloc(&sl->bipred_scratchpad, &sl->bipred_scratchpad_allocated, 16 * 6 * alloc_size);
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    // edge emu needs blocksize + filter length - 1
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    // (= 21x21 for  H.264)
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    av_fast_malloc(&sl->edge_emu_buffer, &sl->edge_emu_buffer_allocated, alloc_size * 2 * 21);
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    av_fast_malloc(&sl->top_borders[0], &sl->top_borders_allocated[0],
                   h->mb_width * 16 * 3 * sizeof(uint8_t) * 2);
    av_fast_malloc(&sl->top_borders[1], &sl->top_borders_allocated[1],
                   h->mb_width * 16 * 3 * sizeof(uint8_t) * 2);

    if (!sl->bipred_scratchpad || !sl->edge_emu_buffer ||
        !sl->top_borders[0]    || !sl->top_borders[1]) {
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        av_freep(&sl->bipred_scratchpad);
        av_freep(&sl->edge_emu_buffer);
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        av_freep(&sl->top_borders[0]);
        av_freep(&sl->top_borders[1]);

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        sl->bipred_scratchpad_allocated = 0;
        sl->edge_emu_buffer_allocated   = 0;
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        sl->top_borders_allocated[0]    = 0;
        sl->top_borders_allocated[1]    = 0;
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        return AVERROR(ENOMEM);
    }

    return 0;
}

static int init_table_pools(H264Context *h)
{
    const int big_mb_num    = h->mb_stride * (h->mb_height + 1) + 1;
    const int mb_array_size = h->mb_stride * h->mb_height;
    const int b4_stride     = h->mb_width * 4 + 1;
    const int b4_array_size = b4_stride * h->mb_height * 4;

    h->qscale_table_pool = av_buffer_pool_init(big_mb_num + h->mb_stride,
                                               av_buffer_allocz);
    h->mb_type_pool      = av_buffer_pool_init((big_mb_num + h->mb_stride) *
                                               sizeof(uint32_t), av_buffer_allocz);
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    h->motion_val_pool   = av_buffer_pool_init(2 * (b4_array_size + 4) *
                                               sizeof(int16_t), av_buffer_allocz);
    h->ref_index_pool    = av_buffer_pool_init(4 * mb_array_size, av_buffer_allocz);
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    if (!h->qscale_table_pool || !h->mb_type_pool || !h->motion_val_pool ||
        !h->ref_index_pool) {
        av_buffer_pool_uninit(&h->qscale_table_pool);
        av_buffer_pool_uninit(&h->mb_type_pool);
        av_buffer_pool_uninit(&h->motion_val_pool);
        av_buffer_pool_uninit(&h->ref_index_pool);
        return AVERROR(ENOMEM);
    }

    return 0;
}

static int alloc_picture(H264Context *h, H264Picture *pic)
{
    int i, ret = 0;

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    av_assert0(!pic->f->data[0]);
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    pic->tf.f = pic->f;
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    ret = ff_thread_get_buffer(h->avctx, &pic->tf, pic->reference ?
                                                   AV_GET_BUFFER_FLAG_REF : 0);
    if (ret < 0)
        goto fail;

    if (h->avctx->hwaccel) {
        const AVHWAccel *hwaccel = h->avctx->hwaccel;
        av_assert0(!pic->hwaccel_picture_private);
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        if (hwaccel->frame_priv_data_size) {
            pic->hwaccel_priv_buf = av_buffer_allocz(hwaccel->frame_priv_data_size);
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            if (!pic->hwaccel_priv_buf)
                return AVERROR(ENOMEM);
            pic->hwaccel_picture_private = pic->hwaccel_priv_buf->data;
        }
    }

    if (!h->qscale_table_pool) {
        ret = init_table_pools(h);
        if (ret < 0)
            goto fail;
    }

    pic->qscale_table_buf = av_buffer_pool_get(h->qscale_table_pool);
    pic->mb_type_buf      = av_buffer_pool_get(h->mb_type_pool);
    if (!pic->qscale_table_buf || !pic->mb_type_buf)
        goto fail;

    pic->mb_type      = (uint32_t*)pic->mb_type_buf->data + 2 * h->mb_stride + 1;
    pic->qscale_table = pic->qscale_table_buf->data + 2 * h->mb_stride + 1;

    for (i = 0; i < 2; i++) {
        pic->motion_val_buf[i] = av_buffer_pool_get(h->motion_val_pool);
        pic->ref_index_buf[i]  = av_buffer_pool_get(h->ref_index_pool);
        if (!pic->motion_val_buf[i] || !pic->ref_index_buf[i])
            goto fail;

        pic->motion_val[i] = (int16_t (*)[2])pic->motion_val_buf[i]->data + 4;
        pic->ref_index[i]  = pic->ref_index_buf[i]->data;
    }

    return 0;
fail:
    ff_h264_unref_picture(h, pic);
    return (ret < 0) ? ret : AVERROR(ENOMEM);
}

static inline int pic_is_unused(H264Context *h, H264Picture *pic)
{
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    if (!pic->f->buf[0])
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        return 1;
    return 0;
}

static int find_unused_picture(H264Context *h)
{
    int i;

    for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
        if (pic_is_unused(h, &h->DPB[i]))
            break;
    }
    if (i == H264_MAX_PICTURE_COUNT)
        return AVERROR_INVALIDDATA;

    return i;
}

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static int initialize_cur_frame(H264Context *h)
{
    H264Picture *cur;
    int ret;

    release_unused_pictures(h, 1);
    ff_h264_unref_picture(h, &h->cur_pic);
    h->cur_pic_ptr = NULL;

    ret = find_unused_picture(h);
    if (ret < 0) {
        av_log(h->avctx, AV_LOG_ERROR, "no frame buffer available\n");
        return ret;
    }
    cur = &h->DPB[ret];

    ret = alloc_picture(h, cur);
    if (ret < 0)
        return ret;

    ret = ff_h264_ref_picture(h, &h->cur_pic, cur);
    if (ret < 0)
        return ret;
    h->cur_pic_ptr = cur;

    return 0;
}
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#define IN_RANGE(a, b, size) (((a) >= (b)) && ((a) < ((b) + (size))))
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#define REBASE_PICTURE(pic, new_ctx, old_ctx)             \
    ((pic && pic >= old_ctx->DPB &&                       \
      pic < old_ctx->DPB + H264_MAX_PICTURE_COUNT) ?          \
     &new_ctx->DPB[pic - old_ctx->DPB] : NULL)

static void copy_picture_range(H264Picture **to, H264Picture **from, int count,
                               H264Context *new_base,
                               H264Context *old_base)
{
    int i;

    for (i = 0; i < count; i++) {
        assert((IN_RANGE(from[i], old_base, sizeof(*old_base)) ||
                IN_RANGE(from[i], old_base->DPB,
                         sizeof(H264Picture) * H264_MAX_PICTURE_COUNT) ||
                !from[i]));
        to[i] = REBASE_PICTURE(from[i], new_base, old_base);
    }
}

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static int h264_slice_header_init(H264Context *h);
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int ff_h264_update_thread_context(AVCodecContext *dst,
                                  const AVCodecContext *src)
{
    H264Context *h = dst->priv_data, *h1 = src->priv_data;
    int inited = h->context_initialized, err = 0;
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    int need_reinit = 0;
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    int i, ret;

    if (dst == src || !h1->context_initialized)
        return 0;

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    if (!h1->ps.sps)
        return AVERROR_INVALIDDATA;

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    if (inited &&
        (h->width                 != h1->width                 ||
         h->height                != h1->height                ||
         h->mb_width              != h1->mb_width              ||
         h->mb_height             != h1->mb_height             ||
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         !h->ps.sps                                            ||
         h->ps.sps->bit_depth_luma    != h1->ps.sps->bit_depth_luma    ||
         h->ps.sps->chroma_format_idc != h1->ps.sps->chroma_format_idc ||
         h->ps.sps->colorspace        != h1->ps.sps->colorspace)) {
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        need_reinit = 1;
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    }

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    // SPS/PPS
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    for (i = 0; i < FF_ARRAY_ELEMS(h->ps.sps_list); i++) {
        av_buffer_unref(&h->ps.sps_list[i]);
        if (h1->ps.sps_list[i]) {
            h->ps.sps_list[i] = av_buffer_ref(h1->ps.sps_list[i]);
            if (!h->ps.sps_list[i])
                return AVERROR(ENOMEM);
        }
    }
    for (i = 0; i < FF_ARRAY_ELEMS(h->ps.pps_list); i++) {
        av_buffer_unref(&h->ps.pps_list[i]);
        if (h1->ps.pps_list[i]) {
            h->ps.pps_list[i] = av_buffer_ref(h1->ps.pps_list[i]);
            if (!h->ps.pps_list[i])
                return AVERROR(ENOMEM);
        }
    }

    h->ps.sps = h1->ps.sps;
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    if (need_reinit || !inited) {
        h->width     = h1->width;
        h->height    = h1->height;
        h->mb_height = h1->mb_height;
        h->mb_width  = h1->mb_width;
        h->mb_num    = h1->mb_num;
        h->mb_stride = h1->mb_stride;
        h->b_stride  = h1->b_stride;

        if ((err = h264_slice_header_init(h)) < 0) {
            av_log(h->avctx, AV_LOG_ERROR, "h264_slice_header_init() failed");
            return err;
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        }

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        /* copy block_offset since frame_start may not be called */
        memcpy(h->block_offset, h1->block_offset, sizeof(h->block_offset));
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    }

    h->avctx->coded_height  = h1->avctx->coded_height;
    h->avctx->coded_width   = h1->avctx->coded_width;
    h->avctx->width         = h1->avctx->width;
    h->avctx->height        = h1->avctx->height;
    h->coded_picture_number = h1->coded_picture_number;
    h->first_field          = h1->first_field;
    h->picture_structure    = h1->picture_structure;
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    h->mb_aff_frame         = h1->mb_aff_frame;
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    h->droppable            = h1->droppable;

    for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
        ff_h264_unref_picture(h, &h->DPB[i]);
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        if (h1->DPB[i].f->buf[0] &&
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            (ret = ff_h264_ref_picture(h, &h->DPB[i], &h1->DPB[i])) < 0)
            return ret;
    }

    h->cur_pic_ptr = REBASE_PICTURE(h1->cur_pic_ptr, h, h1);
    ff_h264_unref_picture(h, &h->cur_pic);
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    if (h1->cur_pic.f->buf[0]) {
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        ret = ff_h264_ref_picture(h, &h->cur_pic, &h1->cur_pic);
        if (ret < 0)
            return ret;
    }
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    h->enable_er       = h1->enable_er;
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    h->workaround_bugs = h1->workaround_bugs;
    h->droppable       = h1->droppable;

    // extradata/NAL handling
    h->is_avc = h1->is_avc;
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    h->nal_length_size = h1->nal_length_size;
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    memcpy(&h->poc,        &h1->poc,        sizeof(h->poc));

    memcpy(h->short_ref,   h1->short_ref,   sizeof(h->short_ref));
    memcpy(h->long_ref,    h1->long_ref,    sizeof(h->long_ref));
    memcpy(h->delayed_pic, h1->delayed_pic, sizeof(h->delayed_pic));
    memcpy(h->last_pocs,   h1->last_pocs,   sizeof(h->last_pocs));

    h->next_outputed_poc = h1->next_outputed_poc;

    memcpy(h->mmco, h1->mmco, sizeof(h->mmco));
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    h->nb_mmco         = h1->nb_mmco;
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    h->mmco_reset      = h1->mmco_reset;
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    h->explicit_ref_marking = h1->explicit_ref_marking;
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    h->long_ref_count  = h1->long_ref_count;
    h->short_ref_count = h1->short_ref_count;
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    copy_picture_range(h->short_ref, h1->short_ref, 32, h, h1);
    copy_picture_range(h->long_ref, h1->long_ref, 32, h, h1);
    copy_picture_range(h->delayed_pic, h1->delayed_pic,
                       MAX_DELAYED_PIC_COUNT + 2, h, h1);

    if (!h->cur_pic_ptr)
        return 0;

    if (!h->droppable) {
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        err = ff_h264_execute_ref_pic_marking(h);
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        h->poc.prev_poc_msb = h->poc.poc_msb;
        h->poc.prev_poc_lsb = h->poc.poc_lsb;
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    }
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    h->poc.prev_frame_num_offset = h->poc.frame_num_offset;
    h->poc.prev_frame_num        = h->poc.frame_num;
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    h->recovery_frame        = h1->recovery_frame;
    h->frame_recovered       = h1->frame_recovered;

    return err;
}

static int h264_frame_start(H264Context *h)
{
    H264Picture *pic;
    int i, ret;
    const int pixel_shift = h->pixel_shift;

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    ret = initialize_cur_frame(h);
    if (ret < 0)
        return ret;
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    pic = h->cur_pic_ptr;
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    pic->reference              = h->droppable ? 0 : h->picture_structure;
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    pic->f->coded_picture_number = h->coded_picture_number++;
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    pic->field_picture          = h->picture_structure != PICT_FRAME;
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    pic->frame_num               = h->poc.frame_num;
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    /*
     * Zero key_frame here; IDR markings per slice in frame or fields are ORed
     * in later.
     * See decode_nal_units().
     */
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    pic->f->key_frame = 0;
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    pic->mmco_reset  = 0;
    pic->recovered   = 0;

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    pic->f->pict_type = h->slice_ctx[0].slice_type;

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    if (CONFIG_ERROR_RESILIENCE && h->enable_er)
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        ff_er_frame_start(&h->slice_ctx[0].er);
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    for (i = 0; i < 16; i++) {
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        h->block_offset[i]           = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 4 * pic->f->linesize[0] * ((scan8[i] - scan8[0]) >> 3);
        h->block_offset[48 + i]      = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 8 * pic->f->linesize[0] * ((scan8[i] - scan8[0]) >> 3);
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    }
    for (i = 0; i < 16; i++) {
        h->block_offset[16 + i]      =
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        h->block_offset[32 + i]      = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 4 * pic->f->linesize[1] * ((scan8[i] - scan8[0]) >> 3);
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        h->block_offset[48 + 16 + i] =
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        h->block_offset[48 + 32 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 8 * pic->f->linesize[1] * ((scan8[i] - scan8[0]) >> 3);
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    }

    /* Some macroblocks can be accessed before they're available in case
     * of lost slices, MBAFF or threading. */
    memset(h->slice_table, -1,
           (h->mb_height * h->mb_stride - 1) * sizeof(*h->slice_table));

    /* We mark the current picture as non-reference after allocating it, so
     * that if we break out due to an error it can be released automatically
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     * in the next ff_mpv_frame_start().
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     */
    h->cur_pic_ptr->reference = 0;

    h->cur_pic_ptr->field_poc[0] = h->cur_pic_ptr->field_poc[1] = INT_MAX;

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    h->postpone_filter = 0;

503 504
    h->mb_aff_frame = h->ps.sps->mb_aff && (h->picture_structure == PICT_FRAME);

505 506 507 508 509
    assert(h->cur_pic_ptr->long_ref == 0);

    return 0;
}

510
static av_always_inline void backup_mb_border(const H264Context *h, H264SliceContext *sl,
511
                                              uint8_t *src_y,
512 513 514 515 516 517 518 519 520 521 522 523 524 525 526
                                              uint8_t *src_cb, uint8_t *src_cr,
                                              int linesize, int uvlinesize,
                                              int simple)
{
    uint8_t *top_border;
    int top_idx = 1;
    const int pixel_shift = h->pixel_shift;
    int chroma444 = CHROMA444(h);
    int chroma422 = CHROMA422(h);

    src_y  -= linesize;
    src_cb -= uvlinesize;
    src_cr -= uvlinesize;

    if (!simple && FRAME_MBAFF(h)) {
527
        if (sl->mb_y & 1) {
528
            if (!MB_MBAFF(sl)) {
529
                top_border = sl->top_borders[0][sl->mb_x];
530 531 532
                AV_COPY128(top_border, src_y + 15 * linesize);
                if (pixel_shift)
                    AV_COPY128(top_border + 16, src_y + 15 * linesize + 16);
533
                if (simple || !CONFIG_GRAY || !(h->flags & AV_CODEC_FLAG_GRAY)) {
534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562
                    if (chroma444) {
                        if (pixel_shift) {
                            AV_COPY128(top_border + 32, src_cb + 15 * uvlinesize);
                            AV_COPY128(top_border + 48, src_cb + 15 * uvlinesize + 16);
                            AV_COPY128(top_border + 64, src_cr + 15 * uvlinesize);
                            AV_COPY128(top_border + 80, src_cr + 15 * uvlinesize + 16);
                        } else {
                            AV_COPY128(top_border + 16, src_cb + 15 * uvlinesize);
                            AV_COPY128(top_border + 32, src_cr + 15 * uvlinesize);
                        }
                    } else if (chroma422) {
                        if (pixel_shift) {
                            AV_COPY128(top_border + 32, src_cb + 15 * uvlinesize);
                            AV_COPY128(top_border + 48, src_cr + 15 * uvlinesize);
                        } else {
                            AV_COPY64(top_border + 16, src_cb + 15 * uvlinesize);
                            AV_COPY64(top_border + 24, src_cr + 15 * uvlinesize);
                        }
                    } else {
                        if (pixel_shift) {
                            AV_COPY128(top_border + 32, src_cb + 7 * uvlinesize);
                            AV_COPY128(top_border + 48, src_cr + 7 * uvlinesize);
                        } else {
                            AV_COPY64(top_border + 16, src_cb + 7 * uvlinesize);
                            AV_COPY64(top_border + 24, src_cr + 7 * uvlinesize);
                        }
                    }
                }
            }
563
        } else if (MB_MBAFF(sl)) {
564 565 566 567 568
            top_idx = 0;
        } else
            return;
    }

569
    top_border = sl->top_borders[top_idx][sl->mb_x];
570 571 572 573 574 575
    /* There are two lines saved, the line above the top macroblock
     * of a pair, and the line above the bottom macroblock. */
    AV_COPY128(top_border, src_y + 16 * linesize);
    if (pixel_shift)
        AV_COPY128(top_border + 16, src_y + 16 * linesize + 16);

576
    if (simple || !CONFIG_GRAY || !(h->flags & AV_CODEC_FLAG_GRAY)) {
577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611
        if (chroma444) {
            if (pixel_shift) {
                AV_COPY128(top_border + 32, src_cb + 16 * linesize);
                AV_COPY128(top_border + 48, src_cb + 16 * linesize + 16);
                AV_COPY128(top_border + 64, src_cr + 16 * linesize);
                AV_COPY128(top_border + 80, src_cr + 16 * linesize + 16);
            } else {
                AV_COPY128(top_border + 16, src_cb + 16 * linesize);
                AV_COPY128(top_border + 32, src_cr + 16 * linesize);
            }
        } else if (chroma422) {
            if (pixel_shift) {
                AV_COPY128(top_border + 32, src_cb + 16 * uvlinesize);
                AV_COPY128(top_border + 48, src_cr + 16 * uvlinesize);
            } else {
                AV_COPY64(top_border + 16, src_cb + 16 * uvlinesize);
                AV_COPY64(top_border + 24, src_cr + 16 * uvlinesize);
            }
        } else {
            if (pixel_shift) {
                AV_COPY128(top_border + 32, src_cb + 8 * uvlinesize);
                AV_COPY128(top_border + 48, src_cr + 8 * uvlinesize);
            } else {
                AV_COPY64(top_border + 16, src_cb + 8 * uvlinesize);
                AV_COPY64(top_border + 24, src_cr + 8 * uvlinesize);
            }
        }
    }
}

/**
 * Initialize implicit_weight table.
 * @param field  0/1 initialize the weight for interlaced MBAFF
 *                -1 initializes the rest
 */
612
static void implicit_weight_table(const H264Context *h, H264SliceContext *sl, int field)
613 614 615 616
{
    int ref0, ref1, i, cur_poc, ref_start, ref_count0, ref_count1;

    for (i = 0; i < 2; i++) {
617 618
        sl->pwt.luma_weight_flag[i]   = 0;
        sl->pwt.chroma_weight_flag[i] = 0;
619 620 621 622 623 624 625 626
    }

    if (field < 0) {
        if (h->picture_structure == PICT_FRAME) {
            cur_poc = h->cur_pic_ptr->poc;
        } else {
            cur_poc = h->cur_pic_ptr->field_poc[h->picture_structure - 1];
        }
627 628
        if (sl->ref_count[0] == 1 && sl->ref_count[1] == 1 && !FRAME_MBAFF(h) &&
            sl->ref_list[0][0].poc + sl->ref_list[1][0].poc == 2 * cur_poc) {
629 630
            sl->pwt.use_weight        = 0;
            sl->pwt.use_weight_chroma = 0;
631 632 633
            return;
        }
        ref_start  = 0;
634 635
        ref_count0 = sl->ref_count[0];
        ref_count1 = sl->ref_count[1];
636 637 638
    } else {
        cur_poc    = h->cur_pic_ptr->field_poc[field];
        ref_start  = 16;
639 640
        ref_count0 = 16 + 2 * sl->ref_count[0];
        ref_count1 = 16 + 2 * sl->ref_count[1];
641 642
    }

643 644 645 646
    sl->pwt.use_weight               = 2;
    sl->pwt.use_weight_chroma        = 2;
    sl->pwt.luma_log2_weight_denom   = 5;
    sl->pwt.chroma_log2_weight_denom = 5;
647 648

    for (ref0 = ref_start; ref0 < ref_count0; ref0++) {
649
        int poc0 = sl->ref_list[0][ref0].poc;
650 651
        for (ref1 = ref_start; ref1 < ref_count1; ref1++) {
            int w = 32;
652
            if (!sl->ref_list[0][ref0].parent->long_ref && !sl->ref_list[1][ref1].parent->long_ref) {
653
                int poc1 = sl->ref_list[1][ref1].poc;
654
                int td   = av_clip_int8(poc1 - poc0);
655
                if (td) {
656
                    int tb = av_clip_int8(cur_poc - poc0);
657 658 659 660 661 662 663
                    int tx = (16384 + (FFABS(td) >> 1)) / td;
                    int dist_scale_factor = (tb * tx + 32) >> 8;
                    if (dist_scale_factor >= -64 && dist_scale_factor <= 128)
                        w = 64 - dist_scale_factor;
                }
            }
            if (field < 0) {
664 665
                sl->pwt.implicit_weight[ref0][ref1][0] =
                sl->pwt.implicit_weight[ref0][ref1][1] = w;
666
            } else {
667
                sl->pwt.implicit_weight[ref0][ref1][field] = w;
668 669 670 671 672 673 674 675 676 677 678 679 680
            }
        }
    }
}

/**
 * initialize scan tables
 */
static void init_scan_tables(H264Context *h)
{
    int i;
    for (i = 0; i < 16; i++) {
#define TRANSPOSE(x) (x >> 2) | ((x << 2) & 0xF)
681
        h->zigzag_scan[i] = TRANSPOSE(ff_zigzag_scan[i]);
682 683 684 685 686 687 688 689 690 691 692
        h->field_scan[i]  = TRANSPOSE(field_scan[i]);
#undef TRANSPOSE
    }
    for (i = 0; i < 64; i++) {
#define TRANSPOSE(x) (x >> 3) | ((x & 7) << 3)
        h->zigzag_scan8x8[i]       = TRANSPOSE(ff_zigzag_direct[i]);
        h->zigzag_scan8x8_cavlc[i] = TRANSPOSE(zigzag_scan8x8_cavlc[i]);
        h->field_scan8x8[i]        = TRANSPOSE(field_scan8x8[i]);
        h->field_scan8x8_cavlc[i]  = TRANSPOSE(field_scan8x8_cavlc[i]);
#undef TRANSPOSE
    }
693
    if (h->ps.sps->transform_bypass) { // FIXME same ugly
694
        h->zigzag_scan_q0          = ff_zigzag_scan;
695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711
        h->zigzag_scan8x8_q0       = ff_zigzag_direct;
        h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
        h->field_scan_q0           = field_scan;
        h->field_scan8x8_q0        = field_scan8x8;
        h->field_scan8x8_cavlc_q0  = field_scan8x8_cavlc;
    } else {
        h->zigzag_scan_q0          = h->zigzag_scan;
        h->zigzag_scan8x8_q0       = h->zigzag_scan8x8;
        h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
        h->field_scan_q0           = h->field_scan;
        h->field_scan8x8_q0        = h->field_scan8x8;
        h->field_scan8x8_cavlc_q0  = h->field_scan8x8_cavlc;
    }
}

static enum AVPixelFormat get_pixel_format(H264Context *h)
{
712
#define HWACCEL_MAX (CONFIG_H264_DXVA2_HWACCEL + \
713
                     CONFIG_H264_D3D11VA_HWACCEL + \
714 715 716 717
                     CONFIG_H264_VAAPI_HWACCEL + \
                     (CONFIG_H264_VDA_HWACCEL * 2) + \
                     CONFIG_H264_VDPAU_HWACCEL)
    enum AVPixelFormat pix_fmts[HWACCEL_MAX + 2], *fmt = pix_fmts;
718 719
    const enum AVPixelFormat *choices = pix_fmts;

720
    switch (h->ps.sps->bit_depth_luma) {
721 722 723
    case 9:
        if (CHROMA444(h)) {
            if (h->avctx->colorspace == AVCOL_SPC_RGB) {
724
                *fmt++ = AV_PIX_FMT_GBRP9;
725
            } else
726
                *fmt++ = AV_PIX_FMT_YUV444P9;
727
        } else if (CHROMA422(h))
728
            *fmt++ = AV_PIX_FMT_YUV422P9;
729
        else
730
            *fmt++ = AV_PIX_FMT_YUV420P9;
731 732 733 734
        break;
    case 10:
        if (CHROMA444(h)) {
            if (h->avctx->colorspace == AVCOL_SPC_RGB) {
735
                *fmt++ = AV_PIX_FMT_GBRP10;
736
            } else
737
                *fmt++ = AV_PIX_FMT_YUV444P10;
738
        } else if (CHROMA422(h))
739
            *fmt++ = AV_PIX_FMT_YUV422P10;
740
        else
741
            *fmt++ = AV_PIX_FMT_YUV420P10;
742 743
        break;
    case 8:
744 745 746
#if CONFIG_H264_VDPAU_HWACCEL
        *fmt++ = AV_PIX_FMT_VDPAU;
#endif
747
        if (CHROMA444(h)) {
748
            if (h->avctx->colorspace == AVCOL_SPC_RGB)
749
                *fmt++ = AV_PIX_FMT_GBRP;
750
            else if (h->avctx->color_range == AVCOL_RANGE_JPEG)
751
                *fmt++ = AV_PIX_FMT_YUVJ444P;
752
            else
753
                *fmt++ = AV_PIX_FMT_YUV444P;
754
        } else if (CHROMA422(h)) {
755
            if (h->avctx->color_range == AVCOL_RANGE_JPEG)
756
                *fmt++ = AV_PIX_FMT_YUVJ422P;
757
            else
758
                *fmt++ = AV_PIX_FMT_YUV422P;
759
        } else {
760 761 762
#if CONFIG_H264_DXVA2_HWACCEL
            *fmt++ = AV_PIX_FMT_DXVA2_VLD;
#endif
763 764 765
#if CONFIG_H264_D3D11VA_HWACCEL
            *fmt++ = AV_PIX_FMT_D3D11VA_VLD;
#endif
766
#if CONFIG_H264_VAAPI_HWACCEL
767
            *fmt++ = AV_PIX_FMT_VAAPI;
768 769 770 771 772
#endif
#if CONFIG_H264_VDA_HWACCEL
            *fmt++ = AV_PIX_FMT_VDA_VLD;
            *fmt++ = AV_PIX_FMT_VDA;
#endif
773 774 775
            if (h->avctx->codec->pix_fmts)
                choices = h->avctx->codec->pix_fmts;
            else if (h->avctx->color_range == AVCOL_RANGE_JPEG)
776
                *fmt++ = AV_PIX_FMT_YUVJ420P;
777
            else
778
                *fmt++ = AV_PIX_FMT_YUV420P;
779 780 781 782
        }
        break;
    default:
        av_log(h->avctx, AV_LOG_ERROR,
783
               "Unsupported bit depth %d\n", h->ps.sps->bit_depth_luma);
784 785
        return AVERROR_INVALIDDATA;
    }
786

787 788
    *fmt = AV_PIX_FMT_NONE;

789
    return ff_get_format(h->avctx, choices);
790 791 792 793 794
}

/* export coded and cropped frame dimensions to AVCodecContext */
static int init_dimensions(H264Context *h)
{
795 796 797
    SPS *sps = h->ps.sps;
    int width  = h->width  - (sps->crop_right + sps->crop_left);
    int height = h->height - (sps->crop_top   + sps->crop_bottom);
798 799

    /* handle container cropping */
800 801
    if (FFALIGN(h->avctx->width,  16) == FFALIGN(width,  16) &&
        FFALIGN(h->avctx->height, 16) == FFALIGN(height, 16)) {
802 803 804 805 806 807 808 809 810 811 812
        width  = h->avctx->width;
        height = h->avctx->height;
    }

    if (width <= 0 || height <= 0) {
        av_log(h->avctx, AV_LOG_ERROR, "Invalid cropped dimensions: %dx%d.\n",
               width, height);
        if (h->avctx->err_recognition & AV_EF_EXPLODE)
            return AVERROR_INVALIDDATA;

        av_log(h->avctx, AV_LOG_WARNING, "Ignoring cropping information.\n");
813 814 815 816 817
        sps->crop_bottom =
        sps->crop_top    =
        sps->crop_right  =
        sps->crop_left   =
        sps->crop        = 0;
818 819 820 821 822 823 824 825 826 827 828 829 830

        width  = h->width;
        height = h->height;
    }

    h->avctx->coded_width  = h->width;
    h->avctx->coded_height = h->height;
    h->avctx->width        = width;
    h->avctx->height       = height;

    return 0;
}

831
static int h264_slice_header_init(H264Context *h)
832
{
833
    const SPS *sps = h->ps.sps;
834 835
    int i, ret;

836
    ff_set_sar(h->avctx, sps->sar);
837 838 839
    av_pix_fmt_get_chroma_sub_sample(h->avctx->pix_fmt,
                                     &h->chroma_x_shift, &h->chroma_y_shift);

840 841
    if (sps->timing_info_present_flag) {
        int64_t den = sps->time_scale;
842
        if (h->sei.unregistered.x264_build < 44U)
843
            den *= 2;
844
        av_reduce(&h->avctx->framerate.den, &h->avctx->framerate.num,
845
                  sps->num_units_in_tick, den, 1 << 30);
846 847
    }

848 849
    ff_h264_free_tables(h);

850 851 852 853 854 855 856 857 858 859
    h->first_field           = 0;
    h->prev_interlaced_frame = 1;

    init_scan_tables(h);
    ret = ff_h264_alloc_tables(h);
    if (ret < 0) {
        av_log(h->avctx, AV_LOG_ERROR, "Could not allocate memory\n");
        return ret;
    }

860
    if (sps->bit_depth_luma < 8 || sps->bit_depth_luma > 10) {
861
        av_log(h->avctx, AV_LOG_ERROR, "Unsupported bit depth %d\n",
862
               sps->bit_depth_luma);
863 864 865
        return AVERROR_INVALIDDATA;
    }

866 867 868 869
    h->avctx->bits_per_raw_sample = sps->bit_depth_luma;
    h->pixel_shift                = sps->bit_depth_luma > 8;
    h->chroma_format_idc          = sps->chroma_format_idc;
    h->bit_depth_luma             = sps->bit_depth_luma;
870

871 872 873 874 875 876 877
    ff_h264dsp_init(&h->h264dsp, sps->bit_depth_luma,
                    sps->chroma_format_idc);
    ff_h264chroma_init(&h->h264chroma, sps->bit_depth_chroma);
    ff_h264qpel_init(&h->h264qpel, sps->bit_depth_luma);
    ff_h264_pred_init(&h->hpc, h->avctx->codec_id, sps->bit_depth_luma,
                      sps->chroma_format_idc);
    ff_videodsp_init(&h->vdsp, sps->bit_depth_luma);
878

879
    if (!HAVE_THREADS || !(h->avctx->active_thread_type & FF_THREAD_SLICE)) {
880
        ret = ff_h264_slice_context_init(h, &h->slice_ctx[0]);
881 882 883 884 885
        if (ret < 0) {
            av_log(h->avctx, AV_LOG_ERROR, "context_init() failed.\n");
            return ret;
        }
    } else {
886
        for (i = 0; i < h->nb_slice_ctx; i++) {
887
            H264SliceContext *sl = &h->slice_ctx[i];
888

889 890 891 892 893 894
            sl->h264               = h;
            sl->intra4x4_pred_mode = h->intra4x4_pred_mode + i * 8 * 2 * h->mb_stride;
            sl->mvd_table[0]       = h->mvd_table[0]       + i * 8 * 2 * h->mb_stride;
            sl->mvd_table[1]       = h->mvd_table[1]       + i * 8 * 2 * h->mb_stride;

            if ((ret = ff_h264_slice_context_init(h, sl)) < 0) {
895 896 897
                av_log(h->avctx, AV_LOG_ERROR, "context_init() failed.\n");
                return ret;
            }
898
        }
899 900 901 902 903 904 905
    }

    h->context_initialized = 1;

    return 0;
}

906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925
static int h264_init_ps(H264Context *h, const H264SliceContext *sl)
{
    const SPS *sps;
    int needs_reinit = 0, ret;

    h->ps.pps = (const PPS*)h->ps.pps_list[sl->pps_id]->data;
    if (h->ps.sps != (const SPS*)h->ps.sps_list[h->ps.pps->sps_id]->data) {
        h->ps.sps = (SPS*)h->ps.sps_list[h->ps.pps->sps_id]->data;

        if (h->bit_depth_luma    != h->ps.sps->bit_depth_luma ||
            h->chroma_format_idc != h->ps.sps->chroma_format_idc)
            needs_reinit         = 1;
    }
    sps = h->ps.sps;

    h->avctx->profile = ff_h264_get_profile(sps);
    h->avctx->level   = sps->level_idc;
    h->avctx->refs    = sps->ref_frame_count;

    if (h->mb_width  != sps->mb_width ||
926
        h->mb_height != sps->mb_height)
927 928 929
        needs_reinit = 1;

    h->mb_width  = sps->mb_width;
930
    h->mb_height = sps->mb_height;
931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987
    h->mb_num    = h->mb_width * h->mb_height;
    h->mb_stride = h->mb_width + 1;

    h->b_stride = h->mb_width * 4;

    h->chroma_y_shift = sps->chroma_format_idc <= 1; // 400 uses yuv420p

    h->width  = 16 * h->mb_width;
    h->height = 16 * h->mb_height;

    ret = init_dimensions(h);
    if (ret < 0)
        return ret;

    if (sps->video_signal_type_present_flag) {
        h->avctx->color_range = sps->full_range ? AVCOL_RANGE_JPEG
            : AVCOL_RANGE_MPEG;
        if (sps->colour_description_present_flag) {
            if (h->avctx->colorspace != sps->colorspace)
                needs_reinit = 1;
            h->avctx->color_primaries = sps->color_primaries;
            h->avctx->color_trc       = sps->color_trc;
            h->avctx->colorspace      = sps->colorspace;
        }
    }

    if (!h->context_initialized || needs_reinit) {
        h->context_initialized = 0;
        if (sl != h->slice_ctx) {
            av_log(h->avctx, AV_LOG_ERROR,
                   "changing width %d -> %d / height %d -> %d on "
                   "slice %d\n",
                   h->width, h->avctx->coded_width,
                   h->height, h->avctx->coded_height,
                   h->current_slice + 1);
            return AVERROR_INVALIDDATA;
        }

        ff_h264_flush_change(h);

        if ((ret = get_pixel_format(h)) < 0)
            return ret;
        h->avctx->pix_fmt = ret;

        av_log(h->avctx, AV_LOG_VERBOSE, "Reinit context to %dx%d, "
               "pix_fmt: %d\n", h->width, h->height, h->avctx->pix_fmt);

        if ((ret = h264_slice_header_init(h)) < 0) {
            av_log(h->avctx, AV_LOG_ERROR,
                   "h264_slice_header_init() failed\n");
            return ret;
        }
    }

    return 0;
}

988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142
static int h264_export_frame_props(H264Context *h)
{
    const SPS *sps = h->ps.sps;
    H264Picture *cur = h->cur_pic_ptr;

    cur->f->interlaced_frame = 0;
    cur->f->repeat_pict      = 0;

    /* Signal interlacing information externally. */
    /* Prioritize picture timing SEI information over used
     * decoding process if it exists. */

    if (sps->pic_struct_present_flag) {
        H264SEIPictureTiming *pt = &h->sei.picture_timing;
        switch (pt->pic_struct) {
        case SEI_PIC_STRUCT_FRAME:
            break;
        case SEI_PIC_STRUCT_TOP_FIELD:
        case SEI_PIC_STRUCT_BOTTOM_FIELD:
            cur->f->interlaced_frame = 1;
            break;
        case SEI_PIC_STRUCT_TOP_BOTTOM:
        case SEI_PIC_STRUCT_BOTTOM_TOP:
            if (FIELD_OR_MBAFF_PICTURE(h))
                cur->f->interlaced_frame = 1;
            else
                // try to flag soft telecine progressive
                cur->f->interlaced_frame = h->prev_interlaced_frame;
            break;
        case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
        case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
            /* Signal the possibility of telecined film externally
             * (pic_struct 5,6). From these hints, let the applications
             * decide if they apply deinterlacing. */
            cur->f->repeat_pict = 1;
            break;
        case SEI_PIC_STRUCT_FRAME_DOUBLING:
            cur->f->repeat_pict = 2;
            break;
        case SEI_PIC_STRUCT_FRAME_TRIPLING:
            cur->f->repeat_pict = 4;
            break;
        }

        if ((pt->ct_type & 3) &&
            pt->pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
            cur->f->interlaced_frame = (pt->ct_type & (1 << 1)) != 0;
    } else {
        /* Derive interlacing flag from used decoding process. */
        cur->f->interlaced_frame = FIELD_OR_MBAFF_PICTURE(h);
    }
    h->prev_interlaced_frame = cur->f->interlaced_frame;

    if (cur->field_poc[0] != cur->field_poc[1]) {
        /* Derive top_field_first from field pocs. */
        cur->f->top_field_first = cur->field_poc[0] < cur->field_poc[1];
    } else {
        if (cur->f->interlaced_frame || sps->pic_struct_present_flag) {
            /* Use picture timing SEI information. Even if it is a
             * information of a past frame, better than nothing. */
            if (h->sei.picture_timing.pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM ||
                h->sei.picture_timing.pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
                cur->f->top_field_first = 1;
            else
                cur->f->top_field_first = 0;
        } else {
            /* Most likely progressive */
            cur->f->top_field_first = 0;
        }
    }

    if (h->sei.frame_packing.present &&
        h->sei.frame_packing.arrangement_type >= 0 &&
        h->sei.frame_packing.arrangement_type <= 6 &&
        h->sei.frame_packing.content_interpretation_type > 0 &&
        h->sei.frame_packing.content_interpretation_type < 3) {
        H264SEIFramePacking *fp = &h->sei.frame_packing;
        AVStereo3D *stereo = av_stereo3d_create_side_data(cur->f);
        if (!stereo)
            return AVERROR(ENOMEM);

        switch (fp->arrangement_type) {
        case 0:
            stereo->type = AV_STEREO3D_CHECKERBOARD;
            break;
        case 1:
            stereo->type = AV_STEREO3D_COLUMNS;
            break;
        case 2:
            stereo->type = AV_STEREO3D_LINES;
            break;
        case 3:
            if (fp->quincunx_subsampling)
                stereo->type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
            else
                stereo->type = AV_STEREO3D_SIDEBYSIDE;
            break;
        case 4:
            stereo->type = AV_STEREO3D_TOPBOTTOM;
            break;
        case 5:
            stereo->type = AV_STEREO3D_FRAMESEQUENCE;
            break;
        case 6:
            stereo->type = AV_STEREO3D_2D;
            break;
        }

        if (fp->content_interpretation_type == 2)
            stereo->flags = AV_STEREO3D_FLAG_INVERT;
    }

    if (h->sei.display_orientation.present &&
        (h->sei.display_orientation.anticlockwise_rotation ||
         h->sei.display_orientation.hflip ||
         h->sei.display_orientation.vflip)) {
        H264SEIDisplayOrientation *o = &h->sei.display_orientation;
        double angle = o->anticlockwise_rotation * 360 / (double) (1 << 16);
        AVFrameSideData *rotation = av_frame_new_side_data(cur->f,
                                                           AV_FRAME_DATA_DISPLAYMATRIX,
                                                           sizeof(int32_t) * 9);
        if (!rotation)
            return AVERROR(ENOMEM);

        av_display_rotation_set((int32_t *)rotation->data, angle);
        av_display_matrix_flip((int32_t *)rotation->data,
                               o->hflip, o->vflip);
    }

    if (h->sei.afd.present) {
        AVFrameSideData *sd = av_frame_new_side_data(cur->f, AV_FRAME_DATA_AFD,
                                                     sizeof(uint8_t));
        if (!sd)
            return AVERROR(ENOMEM);

        *sd->data = h->sei.afd.active_format_description;
        h->sei.afd.present = 0;
    }

    if (h->sei.a53_caption.a53_caption) {
        H264SEIA53Caption *a53 = &h->sei.a53_caption;
        AVFrameSideData *sd = av_frame_new_side_data(cur->f,
                                                     AV_FRAME_DATA_A53_CC,
                                                     a53->a53_caption_size);
        if (!sd)
            return AVERROR(ENOMEM);

        memcpy(sd->data, a53->a53_caption, a53->a53_caption_size);
        av_freep(&a53->a53_caption);
        a53->a53_caption_size = 0;
    }

    return 0;
}

1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276
static int h264_select_output_frame(H264Context *h)
{
    const SPS *sps = h->ps.sps;
    H264Picture *out = h->cur_pic_ptr;
    H264Picture *cur = h->cur_pic_ptr;
    int i, pics, out_of_order, out_idx;
    int invalid = 0, cnt = 0;
    int ret;

    if (sps->bitstream_restriction_flag ||
        h->avctx->strict_std_compliance >= FF_COMPLIANCE_NORMAL) {
        h->avctx->has_b_frames = FFMAX(h->avctx->has_b_frames, sps->num_reorder_frames);
    }

    pics = 0;
    while (h->delayed_pic[pics])
        pics++;

    assert(pics <= MAX_DELAYED_PIC_COUNT);

    h->delayed_pic[pics++] = cur;
    if (cur->reference == 0)
        cur->reference = DELAYED_PIC_REF;

    /* Frame reordering. This code takes pictures from coding order and sorts
     * them by their incremental POC value into display order. It supports POC
     * gaps, MMCO reset codes and random resets.
     * A "display group" can start either with a IDR frame (f.key_frame = 1),
     * and/or can be closed down with a MMCO reset code. In sequences where
     * there is no delay, we can't detect that (since the frame was already
     * output to the user), so we also set h->mmco_reset to detect the MMCO
     * reset code.
     * FIXME: if we detect insufficient delays (as per h->avctx->has_b_frames),
     * we increase the delay between input and output. All frames affected by
     * the lag (e.g. those that should have been output before another frame
     * that we already returned to the user) will be dropped. This is a bug
     * that we will fix later. */
    for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++) {
        cnt     += out->poc < h->last_pocs[i];
        invalid += out->poc == INT_MIN;
    }
    if (!h->mmco_reset && !cur->f->key_frame &&
        cnt + invalid == MAX_DELAYED_PIC_COUNT && cnt > 0) {
        h->mmco_reset = 2;
        if (pics > 1)
            h->delayed_pic[pics - 2]->mmco_reset = 2;
    }
    if (h->mmco_reset || cur->f->key_frame) {
        for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
            h->last_pocs[i] = INT_MIN;
        cnt     = 0;
        invalid = MAX_DELAYED_PIC_COUNT;
    }
    out     = h->delayed_pic[0];
    out_idx = 0;
    for (i = 1; i < MAX_DELAYED_PIC_COUNT &&
                h->delayed_pic[i] &&
                !h->delayed_pic[i - 1]->mmco_reset &&
                !h->delayed_pic[i]->f->key_frame;
         i++)
        if (h->delayed_pic[i]->poc < out->poc) {
            out     = h->delayed_pic[i];
            out_idx = i;
        }
    if (h->avctx->has_b_frames == 0 &&
        (h->delayed_pic[0]->f->key_frame || h->mmco_reset))
        h->next_outputed_poc = INT_MIN;
    out_of_order = !out->f->key_frame && !h->mmco_reset &&
                   (out->poc < h->next_outputed_poc);

    if (sps->bitstream_restriction_flag &&
        h->avctx->has_b_frames >= sps->num_reorder_frames) {
    } else if (out_of_order && pics - 1 == h->avctx->has_b_frames &&
               h->avctx->has_b_frames < MAX_DELAYED_PIC_COUNT) {
        if (invalid + cnt < MAX_DELAYED_PIC_COUNT) {
            h->avctx->has_b_frames = FFMAX(h->avctx->has_b_frames, cnt);
        }
    } else if (!h->avctx->has_b_frames &&
               ((h->next_outputed_poc != INT_MIN &&
                 out->poc > h->next_outputed_poc + 2) ||
                cur->f->pict_type == AV_PICTURE_TYPE_B)) {
        h->avctx->has_b_frames++;
    }

    if (pics > h->avctx->has_b_frames) {
        out->reference &= ~DELAYED_PIC_REF;
        for (i = out_idx; h->delayed_pic[i]; i++)
            h->delayed_pic[i] = h->delayed_pic[i + 1];
    }
    memmove(h->last_pocs, &h->last_pocs[1],
            sizeof(*h->last_pocs) * (MAX_DELAYED_PIC_COUNT - 1));
    h->last_pocs[MAX_DELAYED_PIC_COUNT - 1] = cur->poc;
    if (!out_of_order && pics > h->avctx->has_b_frames) {
        av_frame_unref(h->output_frame);
        ret = av_frame_ref(h->output_frame, out->f);
        if (ret < 0)
            return ret;

        if (out->recovered) {
            // We have reached an recovery point and all frames after it in
            // display order are "recovered".
            h->frame_recovered |= FRAME_RECOVERED_SEI;
        }
        out->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_SEI);

        if (!out->recovered) {
            if (!(h->avctx->flags & AV_CODEC_FLAG_OUTPUT_CORRUPT))
                av_frame_unref(h->output_frame);
            else
                h->output_frame->flags |= AV_FRAME_FLAG_CORRUPT;
        }

        if (out->mmco_reset) {
            if (out_idx > 0) {
                h->next_outputed_poc                    = out->poc;
                h->delayed_pic[out_idx - 1]->mmco_reset = out->mmco_reset;
            } else {
                h->next_outputed_poc = INT_MIN;
            }
        } else {
            if (out_idx == 0 && pics > 1 && h->delayed_pic[0]->f->key_frame) {
                h->next_outputed_poc = INT_MIN;
            } else {
                h->next_outputed_poc = out->poc;
            }
        }
        h->mmco_reset = 0;
    } else {
        av_log(h->avctx, AV_LOG_DEBUG, "no picture\n");
    }

    return 0;
}

1277 1278 1279 1280
/* This function is called right after decoding the slice header for a first
 * slice in a field (or a frame). It decides whether we are decoding a new frame
 * or a second field in a pair and does the necessary setup.
 */
1281 1282
static int h264_field_start(H264Context *h, const H264SliceContext *sl,
                            const H2645NAL *nal)
1283
{
1284
    const SPS *sps;
1285 1286 1287

    int last_pic_structure, last_pic_droppable, ret;

1288 1289 1290 1291 1292 1293
    ret = h264_init_ps(h, sl);
    if (ret < 0)
        return ret;

    sps = h->ps.sps;

1294 1295
    last_pic_droppable   = h->droppable;
    last_pic_structure   = h->picture_structure;
1296
    h->droppable         = (nal->ref_idc == 0);
1297 1298
    h->picture_structure = sl->picture_structure;

1299 1300 1301 1302 1303 1304
    h->poc.frame_num        = sl->frame_num;
    h->poc.poc_lsb          = sl->poc_lsb;
    h->poc.delta_poc_bottom = sl->delta_poc_bottom;
    h->poc.delta_poc[0]     = sl->delta_poc[0];
    h->poc.delta_poc[1]     = sl->delta_poc[1];

1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459
    /* Shorten frame num gaps so we don't have to allocate reference
     * frames just to throw them away */
    if (h->poc.frame_num != h->poc.prev_frame_num) {
        int unwrap_prev_frame_num = h->poc.prev_frame_num;
        int max_frame_num         = 1 << sps->log2_max_frame_num;

        if (unwrap_prev_frame_num > h->poc.frame_num)
            unwrap_prev_frame_num -= max_frame_num;

        if ((h->poc.frame_num - unwrap_prev_frame_num) > sps->ref_frame_count) {
            unwrap_prev_frame_num = (h->poc.frame_num - sps->ref_frame_count) - 1;
            if (unwrap_prev_frame_num < 0)
                unwrap_prev_frame_num += max_frame_num;

            h->poc.prev_frame_num = unwrap_prev_frame_num;
        }
    }

    /* See if we have a decoded first field looking for a pair...
     * Here, we're using that to see if we should mark previously
     * decode frames as "finished".
     * We have to do that before the "dummy" in-between frame allocation,
     * since that can modify s->current_picture_ptr. */
    if (h->first_field) {
        assert(h->cur_pic_ptr);
        assert(h->cur_pic_ptr->f->buf[0]);
        assert(h->cur_pic_ptr->reference != DELAYED_PIC_REF);

        /* figure out if we have a complementary field pair */
        if (!FIELD_PICTURE(h) || h->picture_structure == last_pic_structure) {
            /* Previous field is unmatched. Don't display it, but let it
             * remain for reference if marked as such. */
            if (!last_pic_droppable && last_pic_structure != PICT_FRAME) {
                ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
                                          last_pic_structure == PICT_TOP_FIELD);
            }
        } else {
            if (h->cur_pic_ptr->frame_num != h->poc.frame_num) {
                /* This and previous field were reference, but had
                 * different frame_nums. Consider this field first in
                 * pair. Throw away previous field except for reference
                 * purposes. */
                if (!last_pic_droppable && last_pic_structure != PICT_FRAME) {
                    ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
                                              last_pic_structure == PICT_TOP_FIELD);
                }
            } else {
                /* Second field in complementary pair */
                if (!((last_pic_structure   == PICT_TOP_FIELD &&
                       h->picture_structure == PICT_BOTTOM_FIELD) ||
                      (last_pic_structure   == PICT_BOTTOM_FIELD &&
                       h->picture_structure == PICT_TOP_FIELD))) {
                    av_log(h->avctx, AV_LOG_ERROR,
                           "Invalid field mode combination %d/%d\n",
                           last_pic_structure, h->picture_structure);
                    h->picture_structure = last_pic_structure;
                    h->droppable         = last_pic_droppable;
                    return AVERROR_INVALIDDATA;
                } else if (last_pic_droppable != h->droppable) {
                    avpriv_request_sample(h->avctx,
                                          "Found reference and non-reference fields in the same frame, which");
                    h->picture_structure = last_pic_structure;
                    h->droppable         = last_pic_droppable;
                    return AVERROR_PATCHWELCOME;
                }
            }
        }
    }

    while (h->poc.frame_num != h->poc.prev_frame_num &&
           h->poc.frame_num != (h->poc.prev_frame_num + 1) % (1 << sps->log2_max_frame_num)) {
        H264Picture *prev = h->short_ref_count ? h->short_ref[0] : NULL;
        av_log(h->avctx, AV_LOG_DEBUG, "Frame num gap %d %d\n",
               h->poc.frame_num, h->poc.prev_frame_num);
        ret = initialize_cur_frame(h);
        if (ret < 0) {
            h->first_field = 0;
            return ret;
        }

        h->poc.prev_frame_num++;
        h->poc.prev_frame_num        %= 1 << sps->log2_max_frame_num;
        h->cur_pic_ptr->frame_num = h->poc.prev_frame_num;
        ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX, 0);
        ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX, 1);

        h->explicit_ref_marking = 0;
        ret = ff_h264_execute_ref_pic_marking(h);
        if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
            return ret;
        /* Error concealment: If a ref is missing, copy the previous ref
         * in its place.
         * FIXME: Avoiding a memcpy would be nice, but ref handling makes
         * many assumptions about there being no actual duplicates.
         * FIXME: This does not copy padding for out-of-frame motion
         * vectors.  Given we are concealing a lost frame, this probably
         * is not noticeable by comparison, but it should be fixed. */
        if (h->short_ref_count) {
            if (prev &&
                h->short_ref[0]->f->width == prev->f->width &&
                h->short_ref[0]->f->height == prev->f->height &&
                h->short_ref[0]->f->format == prev->f->format) {
                av_image_copy(h->short_ref[0]->f->data,
                              h->short_ref[0]->f->linesize,
                              (const uint8_t **)prev->f->data,
                              prev->f->linesize,
                              prev->f->format,
                              h->mb_width  * 16,
                              h->mb_height * 16);
                h->short_ref[0]->poc = prev->poc + 2;
            }
            h->short_ref[0]->frame_num = h->poc.prev_frame_num;
        }
    }

    /* See if we have a decoded first field looking for a pair...
     * We're using that to see whether to continue decoding in that
     * frame, or to allocate a new one. */
    if (h->first_field) {
        assert(h->cur_pic_ptr);
        assert(h->cur_pic_ptr->f->buf[0]);
        assert(h->cur_pic_ptr->reference != DELAYED_PIC_REF);

        /* figure out if we have a complementary field pair */
        if (!FIELD_PICTURE(h) || h->picture_structure == last_pic_structure) {
            /* Previous field is unmatched. Don't display it, but let it
             * remain for reference if marked as such. */
            h->cur_pic_ptr = NULL;
            h->first_field = FIELD_PICTURE(h);
        } else {
            if (h->cur_pic_ptr->frame_num != h->poc.frame_num) {
                /* This and the previous field had different frame_nums.
                 * Consider this field first in pair. Throw away previous
                 * one except for reference purposes. */
                h->first_field = 1;
                h->cur_pic_ptr = NULL;
            } else {
                /* Second field in complementary pair */
                h->first_field = 0;
            }
        }
    } else {
        /* Frame or first field in a potentially complementary pair */
        h->first_field = FIELD_PICTURE(h);
    }

    if (!FIELD_PICTURE(h) || h->first_field) {
        if (h264_frame_start(h) < 0) {
            h->first_field = 0;
            return AVERROR_INVALIDDATA;
        }
    } else {
        release_unused_pictures(h, 0);
    }

1460 1461 1462 1463 1464 1465 1466
    ff_h264_init_poc(h->cur_pic_ptr->field_poc, &h->cur_pic_ptr->poc,
                     h->ps.sps, &h->poc, h->picture_structure, nal->ref_idc);

    memcpy(h->mmco, sl->mmco, sl->nb_mmco * sizeof(*h->mmco));
    h->nb_mmco = sl->nb_mmco;
    h->explicit_ref_marking = sl->explicit_ref_marking;

1467 1468
    h->picture_idr = nal->type == H264_NAL_IDR_SLICE;

1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486
    if (h->sei.recovery_point.recovery_frame_cnt >= 0 && h->recovery_frame < 0) {
        h->recovery_frame = (h->poc.frame_num + h->sei.recovery_point.recovery_frame_cnt) &
                            ((1 << h->ps.sps->log2_max_frame_num) - 1);
    }

    h->cur_pic_ptr->f->key_frame |= (nal->type == H264_NAL_IDR_SLICE) ||
                                    (h->sei.recovery_point.recovery_frame_cnt >= 0);

    if (nal->type == H264_NAL_IDR_SLICE || h->recovery_frame == h->poc.frame_num) {
        h->recovery_frame         = -1;
        h->cur_pic_ptr->recovered = 1;
    }
    // If we have an IDR, all frames after it in decoded order are
    // "recovered".
    if (nal->type == H264_NAL_IDR_SLICE)
        h->frame_recovered |= FRAME_RECOVERED_IDR;
    h->cur_pic_ptr->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_IDR);

1487 1488 1489 1490 1491 1492 1493
    /* Set the frame properties/side data. Only done for the second field in
     * field coded frames, since some SEI information is present for each field
     * and is merged by the SEI parsing code. */
    if (!FIELD_PICTURE(h) || !h->first_field) {
        ret = h264_export_frame_props(h);
        if (ret < 0)
            return ret;
1494 1495 1496 1497

        ret = h264_select_output_frame(h);
        if (ret < 0)
            return ret;
1498 1499
    }

1500 1501 1502 1503 1504 1505
    if (h->avctx->hwaccel) {
        ret = h->avctx->hwaccel->start_frame(h->avctx, NULL, 0);
        if (ret < 0)
            return ret;
    }

1506 1507 1508
    return 0;
}

1509 1510
static int h264_slice_header_parse(H264SliceContext *sl, const H2645NAL *nal,
                                   const H264ParamSets *ps, AVCodecContext *avctx)
1511
{
1512 1513
    const SPS *sps;
    const PPS *pps;
1514
    int ret;
1515
    unsigned int slice_type, tmp, i;
1516
    int field_pic_flag, bottom_field_flag, picture_structure;
1517

1518
    sl->first_mb_addr = get_ue_golomb(&sl->gb);
1519

1520
    slice_type = get_ue_golomb_31(&sl->gb);
1521
    if (slice_type > 9) {
1522
        av_log(avctx, AV_LOG_ERROR,
1523
               "slice type %d too large at %d\n",
1524
               slice_type, sl->first_mb_addr);
1525 1526 1527 1528
        return AVERROR_INVALIDDATA;
    }
    if (slice_type > 4) {
        slice_type -= 5;
1529
        sl->slice_type_fixed = 1;
1530
    } else
1531
        sl->slice_type_fixed = 0;
1532

1533
    slice_type         = ff_h264_golomb_to_pict_type[slice_type];
1534 1535
    sl->slice_type     = slice_type;
    sl->slice_type_nos = slice_type & 3;
1536

1537
    if (nal->type  == H264_NAL_IDR_SLICE &&
1538
        sl->slice_type_nos != AV_PICTURE_TYPE_I) {
1539
        av_log(avctx, AV_LOG_ERROR, "A non-intra slice in an IDR NAL unit.\n");
1540 1541 1542
        return AVERROR_INVALIDDATA;
    }

1543 1544
    sl->pps_id = get_ue_golomb(&sl->gb);
    if (sl->pps_id >= MAX_PPS_COUNT) {
1545
        av_log(avctx, AV_LOG_ERROR, "pps_id %u out of range\n", sl->pps_id);
1546 1547
        return AVERROR_INVALIDDATA;
    }
1548 1549
    if (!ps->pps_list[sl->pps_id]) {
        av_log(avctx, AV_LOG_ERROR,
1550
               "non-existing PPS %u referenced\n",
1551
               sl->pps_id);
1552 1553
        return AVERROR_INVALIDDATA;
    }
1554
    pps = (const PPS*)ps->pps_list[sl->pps_id]->data;
1555

1556 1557
    if (!ps->sps_list[pps->sps_id]) {
        av_log(avctx, AV_LOG_ERROR,
1558
               "non-existing SPS %u referenced\n", pps->sps_id);
1559 1560
        return AVERROR_INVALIDDATA;
    }
1561
    sps = (const SPS*)ps->sps_list[pps->sps_id]->data;
1562

1563
    sl->frame_num = get_bits(&sl->gb, sps->log2_max_frame_num);
1564

1565
    sl->mb_mbaff       = 0;
1566

1567
    if (sps->frame_mbs_only_flag) {
1568
        picture_structure = PICT_FRAME;
1569
    } else {
1570
        field_pic_flag = get_bits1(&sl->gb);
1571
        if (field_pic_flag) {
1572
            bottom_field_flag = get_bits1(&sl->gb);
1573
            picture_structure = PICT_TOP_FIELD + bottom_field_flag;
1574
        } else {
1575
            picture_structure = PICT_FRAME;
1576 1577
        }
    }
1578 1579
    sl->picture_structure      = picture_structure;
    sl->mb_field_decoding_flag = picture_structure != PICT_FRAME;
1580

1581
    if (picture_structure == PICT_FRAME) {
1582 1583
        sl->curr_pic_num = sl->frame_num;
        sl->max_pic_num  = 1 << sps->log2_max_frame_num;
1584
    } else {
1585 1586
        sl->curr_pic_num = 2 * sl->frame_num + 1;
        sl->max_pic_num  = 1 << (sps->log2_max_frame_num + 1);
1587 1588
    }

1589
    if (nal->type == H264_NAL_IDR_SLICE)
1590
        get_ue_golomb(&sl->gb); /* idr_pic_id */
1591

1592
    if (sps->poc_type == 0) {
1593
        sl->poc_lsb = get_bits(&sl->gb, sps->log2_max_poc_lsb);
1594

1595 1596
        if (pps->pic_order_present == 1 && picture_structure == PICT_FRAME)
            sl->delta_poc_bottom = get_se_golomb(&sl->gb);
1597 1598
    }

1599
    if (sps->poc_type == 1 && !sps->delta_pic_order_always_zero_flag) {
1600
        sl->delta_poc[0] = get_se_golomb(&sl->gb);
1601

1602 1603
        if (pps->pic_order_present == 1 && picture_structure == PICT_FRAME)
            sl->delta_poc[1] = get_se_golomb(&sl->gb);
1604 1605
    }

1606
    sl->redundant_pic_count = 0;
1607
    if (pps->redundant_pic_cnt_present)
1608
        sl->redundant_pic_count = get_ue_golomb(&sl->gb);
1609

1610 1611 1612
    if (sl->slice_type_nos == AV_PICTURE_TYPE_B)
        sl->direct_spatial_mv_pred = get_bits1(&sl->gb);

1613
    ret = ff_h264_parse_ref_count(&sl->list_count, sl->ref_count,
1614
                                  &sl->gb, pps, sl->slice_type_nos,
1615
                                  picture_structure);
1616 1617 1618
    if (ret < 0)
        return ret;

1619
    if (sl->slice_type_nos != AV_PICTURE_TYPE_I) {
1620
       ret = ff_h264_decode_ref_pic_list_reordering(sl, avctx);
1621
       if (ret < 0) {
1622
           sl->ref_count[1] = sl->ref_count[0] = 0;
1623 1624 1625 1626
           return ret;
       }
    }

1627 1628 1629 1630 1631
    sl->pwt.use_weight = 0;
    for (i = 0; i < 2; i++) {
        sl->pwt.luma_weight_flag[i]   = 0;
        sl->pwt.chroma_weight_flag[i] = 0;
    }
1632 1633
    if ((pps->weighted_pred && sl->slice_type_nos == AV_PICTURE_TYPE_P) ||
        (pps->weighted_bipred_idc == 1 &&
1634
         sl->slice_type_nos == AV_PICTURE_TYPE_B))
1635
        ff_h264_pred_weight_table(&sl->gb, sps, sl->ref_count,
1636
                                  sl->slice_type_nos, &sl->pwt);
1637

1638
    sl->explicit_ref_marking = 0;
1639
    if (nal->ref_idc) {
1640 1641
        ret = ff_h264_decode_ref_pic_marking(sl, &sl->gb, nal, avctx);
        if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE))
1642 1643 1644
            return AVERROR_INVALIDDATA;
    }

1645
    if (sl->slice_type_nos != AV_PICTURE_TYPE_I && pps->cabac) {
1646
        tmp = get_ue_golomb_31(&sl->gb);
1647
        if (tmp > 2) {
1648
            av_log(avctx, AV_LOG_ERROR, "cabac_init_idc %u overflow\n", tmp);
1649 1650
            return AVERROR_INVALIDDATA;
        }
1651
        sl->cabac_init_idc = tmp;
1652 1653
    }

1654
    sl->last_qscale_diff = 0;
1655 1656
    tmp = pps->init_qp + get_se_golomb(&sl->gb);
    if (tmp > 51 + 6 * (sps->bit_depth_luma - 8)) {
1657
        av_log(avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
1658 1659
        return AVERROR_INVALIDDATA;
    }
1660
    sl->qscale       = tmp;
1661 1662
    sl->chroma_qp[0] = get_chroma_qp(pps, 0, sl->qscale);
    sl->chroma_qp[1] = get_chroma_qp(pps, 1, sl->qscale);
1663
    // FIXME qscale / qp ... stuff
1664
    if (sl->slice_type == AV_PICTURE_TYPE_SP)
1665
        get_bits1(&sl->gb); /* sp_for_switch_flag */
1666 1667
    if (sl->slice_type == AV_PICTURE_TYPE_SP ||
        sl->slice_type == AV_PICTURE_TYPE_SI)
1668
        get_se_golomb(&sl->gb); /* slice_qs_delta */
1669

1670 1671 1672
    sl->deblocking_filter     = 1;
    sl->slice_alpha_c0_offset = 0;
    sl->slice_beta_offset     = 0;
1673
    if (pps->deblocking_filter_parameters_present) {
1674
        tmp = get_ue_golomb_31(&sl->gb);
1675
        if (tmp > 2) {
1676
            av_log(avctx, AV_LOG_ERROR,
1677 1678 1679
                   "deblocking_filter_idc %u out of range\n", tmp);
            return AVERROR_INVALIDDATA;
        }
1680 1681 1682 1683 1684
        sl->deblocking_filter = tmp;
        if (sl->deblocking_filter < 2)
            sl->deblocking_filter ^= 1;  // 1<->0

        if (sl->deblocking_filter) {
1685 1686
            sl->slice_alpha_c0_offset = get_se_golomb(&sl->gb) * 2;
            sl->slice_beta_offset     = get_se_golomb(&sl->gb) * 2;
1687 1688 1689 1690
            if (sl->slice_alpha_c0_offset >  12 ||
                sl->slice_alpha_c0_offset < -12 ||
                sl->slice_beta_offset >  12     ||
                sl->slice_beta_offset < -12) {
1691
                av_log(avctx, AV_LOG_ERROR,
1692
                       "deblocking filter parameters %d %d out of range\n",
1693
                       sl->slice_alpha_c0_offset, sl->slice_beta_offset);
1694 1695 1696 1697 1698
                return AVERROR_INVALIDDATA;
            }
        }
    }

1699 1700 1701
    return 0;
}

1702 1703 1704 1705
/* do all the per-slice initialization needed before we can start decoding the
 * actual MBs */
static int h264_slice_init(H264Context *h, H264SliceContext *sl,
                           const H2645NAL *nal)
1706 1707 1708
{
    int i, j, ret = 0;

1709
    if (h->current_slice > 0) {
1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726
        if (h->ps.pps != (const PPS*)h->ps.pps_list[sl->pps_id]->data) {
            av_log(h->avctx, AV_LOG_ERROR, "PPS changed between slices\n");
            return AVERROR_INVALIDDATA;
        }

        if (h->picture_structure != sl->picture_structure ||
            h->droppable         != (nal->ref_idc == 0)) {
            av_log(h->avctx, AV_LOG_ERROR,
                   "Changing field mode (%d -> %d) between slices is not allowed\n",
                   h->picture_structure, sl->picture_structure);
            return AVERROR_INVALIDDATA;
        } else if (!h->cur_pic_ptr) {
            av_log(h->avctx, AV_LOG_ERROR,
                   "unset cur_pic_ptr on slice %d\n",
                   h->current_slice + 1);
            return AVERROR_INVALIDDATA;
        }
1727 1728
    }

1729 1730 1731 1732 1733
    if (h->picture_idr && nal->type != H264_NAL_IDR_SLICE) {
        av_log(h->avctx, AV_LOG_ERROR, "Invalid mix of IDR and non-IDR slices\n");
        return AVERROR_INVALIDDATA;
    }

1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746
    assert(h->mb_num == h->mb_width * h->mb_height);
    if (sl->first_mb_addr << FIELD_OR_MBAFF_PICTURE(h) >= h->mb_num ||
        sl->first_mb_addr >= h->mb_num) {
        av_log(h->avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
        return AVERROR_INVALIDDATA;
    }
    sl->resync_mb_x = sl->mb_x =  sl->first_mb_addr % h->mb_width;
    sl->resync_mb_y = sl->mb_y = (sl->first_mb_addr / h->mb_width) <<
                                 FIELD_OR_MBAFF_PICTURE(h);
    if (h->picture_structure == PICT_BOTTOM_FIELD)
        sl->resync_mb_y = sl->mb_y = sl->mb_y + 1;
    assert(sl->mb_y < h->mb_height);

1747 1748 1749 1750
    ret = ff_h264_build_ref_list(h, sl);
    if (ret < 0)
        return ret;

1751 1752 1753 1754 1755 1756 1757 1758 1759
    if (h->ps.pps->weighted_bipred_idc == 2 &&
        sl->slice_type_nos == AV_PICTURE_TYPE_B) {
        implicit_weight_table(h, sl, -1);
        if (FRAME_MBAFF(h)) {
            implicit_weight_table(h, sl, 0);
            implicit_weight_table(h, sl, 1);
        }
    }

1760 1761 1762 1763
    if (sl->slice_type_nos == AV_PICTURE_TYPE_B && !sl->direct_spatial_mv_pred)
        ff_h264_direct_dist_scale_factor(h, sl);
    ff_h264_direct_ref_list_init(h, sl);

1764 1765
    if (h->avctx->skip_loop_filter >= AVDISCARD_ALL ||
        (h->avctx->skip_loop_filter >= AVDISCARD_NONKEY &&
1766
         sl->slice_type_nos != AV_PICTURE_TYPE_I) ||
1767
        (h->avctx->skip_loop_filter >= AVDISCARD_BIDIR  &&
1768
         sl->slice_type_nos == AV_PICTURE_TYPE_B) ||
1769
        (h->avctx->skip_loop_filter >= AVDISCARD_NONREF &&
1770
         nal->ref_idc == 0))
1771
        sl->deblocking_filter = 0;
1772

1773
    if (sl->deblocking_filter == 1 && h->nb_slice_ctx > 1) {
1774
        if (h->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1775 1776
            /* Cheat slightly for speed:
             * Do not bother to deblock across slices. */
1777
            sl->deblocking_filter = 2;
1778
        } else {
1779
            h->postpone_filter = 1;
1780 1781
        }
    }
1782
    sl->qp_thresh = 15 -
1783
                   FFMIN(sl->slice_alpha_c0_offset, sl->slice_beta_offset) -
1784
                   FFMAX3(0,
1785 1786 1787
                          h->ps.pps->chroma_qp_index_offset[0],
                          h->ps.pps->chroma_qp_index_offset[1]) +
                   6 * (h->ps.sps->bit_depth_luma - 8);
1788

1789
    sl->slice_num       = ++h->current_slice;
1790
    if (sl->slice_num >= MAX_SLICES) {
1791 1792 1793 1794 1795 1796
        av_log(h->avctx, AV_LOG_ERROR,
               "Too many slices, increase MAX_SLICES and recompile\n");
    }

    for (j = 0; j < 2; j++) {
        int id_list[16];
1797
        int *ref2frm = h->ref2frm[sl->slice_num & (MAX_SLICES - 1)][j];
1798 1799
        for (i = 0; i < 16; i++) {
            id_list[i] = 60;
1800
            if (j < sl->list_count && i < sl->ref_count[j] &&
1801
                sl->ref_list[j][i].parent->f->buf[0]) {
1802
                int k;
1803
                AVBuffer *buf = sl->ref_list[j][i].parent->f->buf[0]->buffer;
1804
                for (k = 0; k < h->short_ref_count; k++)
1805
                    if (h->short_ref[k]->f->buf[0]->buffer == buf) {
1806 1807 1808 1809
                        id_list[i] = k;
                        break;
                    }
                for (k = 0; k < h->long_ref_count; k++)
1810
                    if (h->long_ref[k] && h->long_ref[k]->f->buf[0]->buffer == buf) {
1811 1812 1813 1814 1815 1816 1817 1818 1819
                        id_list[i] = h->short_ref_count + k;
                        break;
                    }
            }
        }

        ref2frm[0] =
        ref2frm[1] = -1;
        for (i = 0; i < 16; i++)
1820
            ref2frm[i + 2] = 4 * id_list[i] + (sl->ref_list[j][i].reference & 3);
1821 1822 1823 1824
        ref2frm[18 + 0] =
        ref2frm[18 + 1] = -1;
        for (i = 16; i < 48; i++)
            ref2frm[i + 4] = 4 * id_list[(i - 16) >> 1] +
1825
                             (sl->ref_list[j][i].reference & 3);
1826 1827 1828 1829
    }

    if (h->avctx->debug & FF_DEBUG_PICT_INFO) {
        av_log(h->avctx, AV_LOG_DEBUG,
1830
               "slice:%d %s mb:%d %c%s%s frame:%d poc:%d/%d ref:%d/%d qp:%d loop:%d:%d:%d weight:%d%s %s\n",
1831
               sl->slice_num,
1832
               (h->picture_structure == PICT_FRAME ? "F" : h->picture_structure == PICT_TOP_FIELD ? "T" : "B"),
1833
               sl->mb_y * h->mb_width + sl->mb_x,
1834 1835
               av_get_picture_type_char(sl->slice_type),
               sl->slice_type_fixed ? " fix" : "",
1836
               nal->type == H264_NAL_IDR_SLICE ? " IDR" : "",
1837
               h->poc.frame_num,
1838 1839
               h->cur_pic_ptr->field_poc[0],
               h->cur_pic_ptr->field_poc[1],
1840
               sl->ref_count[0], sl->ref_count[1],
1841
               sl->qscale,
1842 1843
               sl->deblocking_filter,
               sl->slice_alpha_c0_offset, sl->slice_beta_offset,
1844 1845
               sl->pwt.use_weight,
               sl->pwt.use_weight == 1 && sl->pwt.use_weight_chroma ? "c" : "",
1846
               sl->slice_type == AV_PICTURE_TYPE_B ? (sl->direct_spatial_mv_pred ? "SPAT" : "TEMP") : "");
1847 1848 1849 1850 1851
    }

    return 0;
}

1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 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 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920
int ff_h264_queue_decode_slice(H264Context *h, const H2645NAL *nal)
{
    H264SliceContext *sl = h->slice_ctx + h->nb_slice_ctx_queued;
    int ret;

    sl->gb = nal->gb;

    ret = h264_slice_header_parse(sl, nal, &h->ps, h->avctx);
    if (ret < 0)
        return ret;

    // discard redundant pictures
    if (sl->redundant_pic_count > 0)
        return 0;

    if (!h->setup_finished) {
        if (sl->first_mb_addr == 0) { // FIXME better field boundary detection
            // this slice starts a new field
            // first decode any pending queued slices
            if (h->nb_slice_ctx_queued) {
                H264SliceContext tmp_ctx;

                ret = ff_h264_execute_decode_slices(h);
                if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
                    return ret;

                memcpy(&tmp_ctx, h->slice_ctx, sizeof(tmp_ctx));
                memcpy(h->slice_ctx, sl, sizeof(tmp_ctx));
                memcpy(sl, &tmp_ctx, sizeof(tmp_ctx));
                sl = h->slice_ctx;
            }

            if (h->current_slice && h->cur_pic_ptr && FIELD_PICTURE(h)) {
                ff_h264_field_end(h, sl, 1);
            }

            h->current_slice = 0;
            if (!h->first_field) {
                if (h->cur_pic_ptr && !h->droppable) {
                    ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
                                              h->picture_structure == PICT_BOTTOM_FIELD);
                }
                h->cur_pic_ptr = NULL;
            }
        }

        if (h->current_slice == 0) {
            ret = h264_field_start(h, sl, nal);
            if (ret < 0)
                return ret;
        }
    }

    ret = h264_slice_init(h, sl, nal);
    if (ret < 0)
        return ret;

    if ((h->avctx->skip_frame < AVDISCARD_NONREF || nal->ref_idc) &&
        (h->avctx->skip_frame < AVDISCARD_BIDIR  ||
         sl->slice_type_nos != AV_PICTURE_TYPE_B) &&
        (h->avctx->skip_frame < AVDISCARD_NONKEY ||
         h->cur_pic_ptr->f->key_frame) &&
        h->avctx->skip_frame < AVDISCARD_ALL) {
        h->nb_slice_ctx_queued++;
    }

    return 0;
}

1921
int ff_h264_get_slice_type(const H264SliceContext *sl)
1922
{
1923
    switch (sl->slice_type) {
1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938
    case AV_PICTURE_TYPE_P:
        return 0;
    case AV_PICTURE_TYPE_B:
        return 1;
    case AV_PICTURE_TYPE_I:
        return 2;
    case AV_PICTURE_TYPE_SP:
        return 3;
    case AV_PICTURE_TYPE_SI:
        return 4;
    default:
        return AVERROR_INVALIDDATA;
    }
}

1939
static av_always_inline void fill_filter_caches_inter(const H264Context *h,
1940
                                                      H264SliceContext *sl,
1941 1942 1943 1944 1945 1946 1947
                                                      int mb_type, int top_xy,
                                                      int left_xy[LEFT_MBS],
                                                      int top_type,
                                                      int left_type[LEFT_MBS],
                                                      int mb_xy, int list)
{
    int b_stride = h->b_stride;
1948 1949
    int16_t(*mv_dst)[2] = &sl->mv_cache[list][scan8[0]];
    int8_t *ref_cache   = &sl->ref_cache[list][scan8[0]];
1950 1951 1952 1953
    if (IS_INTER(mb_type) || IS_DIRECT(mb_type)) {
        if (USES_LIST(top_type, list)) {
            const int b_xy  = h->mb2b_xy[top_xy] + 3 * b_stride;
            const int b8_xy = 4 * top_xy + 2;
1954
            const int *ref2frm = &h->ref2frm[h->slice_table[top_xy] & (MAX_SLICES - 1)][list][(MB_MBAFF(sl) ? 20 : 2)];
1955 1956
            AV_COPY128(mv_dst - 1 * 8, h->cur_pic.motion_val[list][b_xy + 0]);
            ref_cache[0 - 1 * 8] =
1957
            ref_cache[1 - 1 * 8] = ref2frm[h->cur_pic.ref_index[list][b8_xy + 0]];
1958
            ref_cache[2 - 1 * 8] =
1959
            ref_cache[3 - 1 * 8] = ref2frm[h->cur_pic.ref_index[list][b8_xy + 1]];
1960 1961 1962 1963 1964 1965 1966 1967 1968
        } else {
            AV_ZERO128(mv_dst - 1 * 8);
            AV_WN32A(&ref_cache[0 - 1 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
        }

        if (!IS_INTERLACED(mb_type ^ left_type[LTOP])) {
            if (USES_LIST(left_type[LTOP], list)) {
                const int b_xy  = h->mb2b_xy[left_xy[LTOP]] + 3;
                const int b8_xy = 4 * left_xy[LTOP] + 1;
1969
                const int *ref2frm = &h->ref2frm[h->slice_table[left_xy[LTOP]] & (MAX_SLICES - 1)][list][(MB_MBAFF(sl) ? 20 : 2)];
1970 1971 1972 1973 1974
                AV_COPY32(mv_dst - 1 +  0, h->cur_pic.motion_val[list][b_xy + b_stride * 0]);
                AV_COPY32(mv_dst - 1 +  8, h->cur_pic.motion_val[list][b_xy + b_stride * 1]);
                AV_COPY32(mv_dst - 1 + 16, h->cur_pic.motion_val[list][b_xy + b_stride * 2]);
                AV_COPY32(mv_dst - 1 + 24, h->cur_pic.motion_val[list][b_xy + b_stride * 3]);
                ref_cache[-1 +  0] =
1975
                ref_cache[-1 +  8] = ref2frm[h->cur_pic.ref_index[list][b8_xy + 2 * 0]];
1976
                ref_cache[-1 + 16] =
1977
                ref_cache[-1 + 24] = ref2frm[h->cur_pic.ref_index[list][b8_xy + 2 * 1]];
1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001
            } else {
                AV_ZERO32(mv_dst - 1 +  0);
                AV_ZERO32(mv_dst - 1 +  8);
                AV_ZERO32(mv_dst - 1 + 16);
                AV_ZERO32(mv_dst - 1 + 24);
                ref_cache[-1 +  0] =
                ref_cache[-1 +  8] =
                ref_cache[-1 + 16] =
                ref_cache[-1 + 24] = LIST_NOT_USED;
            }
        }
    }

    if (!USES_LIST(mb_type, list)) {
        fill_rectangle(mv_dst, 4, 4, 8, pack16to32(0, 0), 4);
        AV_WN32A(&ref_cache[0 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
        AV_WN32A(&ref_cache[1 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
        AV_WN32A(&ref_cache[2 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
        AV_WN32A(&ref_cache[3 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
        return;
    }

    {
        int8_t *ref = &h->cur_pic.ref_index[list][4 * mb_xy];
2002 2003 2004
        const int *ref2frm = &h->ref2frm[sl->slice_num & (MAX_SLICES - 1)][list][(MB_MBAFF(sl) ? 20 : 2)];
        uint32_t ref01 = (pack16to32(ref2frm[ref[0]], ref2frm[ref[1]]) & 0x00FF00FF) * 0x0101;
        uint32_t ref23 = (pack16to32(ref2frm[ref[2]], ref2frm[ref[3]]) & 0x00FF00FF) * 0x0101;
2005 2006 2007 2008 2009 2010 2011
        AV_WN32A(&ref_cache[0 * 8], ref01);
        AV_WN32A(&ref_cache[1 * 8], ref01);
        AV_WN32A(&ref_cache[2 * 8], ref23);
        AV_WN32A(&ref_cache[3 * 8], ref23);
    }

    {
2012
        int16_t(*mv_src)[2] = &h->cur_pic.motion_val[list][4 * sl->mb_x + 4 * sl->mb_y * b_stride];
2013 2014 2015 2016 2017 2018 2019 2020 2021 2022
        AV_COPY128(mv_dst + 8 * 0, mv_src + 0 * b_stride);
        AV_COPY128(mv_dst + 8 * 1, mv_src + 1 * b_stride);
        AV_COPY128(mv_dst + 8 * 2, mv_src + 2 * b_stride);
        AV_COPY128(mv_dst + 8 * 3, mv_src + 3 * b_stride);
    }
}

/**
 * @return non zero if the loop filter can be skipped
 */
2023
static int fill_filter_caches(const H264Context *h, H264SliceContext *sl, int mb_type)
2024
{
2025
    const int mb_xy = sl->mb_xy;
2026 2027 2028 2029 2030
    int top_xy, left_xy[LEFT_MBS];
    int top_type, left_type[LEFT_MBS];
    uint8_t *nnz;
    uint8_t *nnz_cache;

2031
    top_xy = mb_xy - (h->mb_stride << MB_FIELD(sl));
2032 2033 2034 2035 2036

    left_xy[LBOT] = left_xy[LTOP] = mb_xy - 1;
    if (FRAME_MBAFF(h)) {
        const int left_mb_field_flag = IS_INTERLACED(h->cur_pic.mb_type[mb_xy - 1]);
        const int curr_mb_field_flag = IS_INTERLACED(mb_type);
2037
        if (sl->mb_y & 1) {
2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048
            if (left_mb_field_flag != curr_mb_field_flag)
                left_xy[LTOP] -= h->mb_stride;
        } else {
            if (curr_mb_field_flag)
                top_xy += h->mb_stride &
                          (((h->cur_pic.mb_type[top_xy] >> 7) & 1) - 1);
            if (left_mb_field_flag != curr_mb_field_flag)
                left_xy[LBOT] += h->mb_stride;
        }
    }

2049 2050 2051
    sl->top_mb_xy        = top_xy;
    sl->left_mb_xy[LTOP] = left_xy[LTOP];
    sl->left_mb_xy[LBOT] = left_xy[LBOT];
2052 2053 2054 2055
    {
        /* For sufficiently low qp, filtering wouldn't do anything.
         * This is a conservative estimate: could also check beta_offset
         * and more accurate chroma_qp. */
2056
        int qp_thresh = sl->qp_thresh; // FIXME strictly we should store qp_thresh for each mb of a slice
2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075
        int qp        = h->cur_pic.qscale_table[mb_xy];
        if (qp <= qp_thresh &&
            (left_xy[LTOP] < 0 ||
             ((qp + h->cur_pic.qscale_table[left_xy[LTOP]] + 1) >> 1) <= qp_thresh) &&
            (top_xy < 0 ||
             ((qp + h->cur_pic.qscale_table[top_xy] + 1) >> 1) <= qp_thresh)) {
            if (!FRAME_MBAFF(h))
                return 1;
            if ((left_xy[LTOP] < 0 ||
                 ((qp + h->cur_pic.qscale_table[left_xy[LBOT]] + 1) >> 1) <= qp_thresh) &&
                (top_xy < h->mb_stride ||
                 ((qp + h->cur_pic.qscale_table[top_xy - h->mb_stride] + 1) >> 1) <= qp_thresh))
                return 1;
        }
    }

    top_type        = h->cur_pic.mb_type[top_xy];
    left_type[LTOP] = h->cur_pic.mb_type[left_xy[LTOP]];
    left_type[LBOT] = h->cur_pic.mb_type[left_xy[LBOT]];
2076
    if (sl->deblocking_filter == 2) {
2077
        if (h->slice_table[top_xy] != sl->slice_num)
2078
            top_type = 0;
2079
        if (h->slice_table[left_xy[LBOT]] != sl->slice_num)
2080 2081 2082 2083 2084 2085 2086
            left_type[LTOP] = left_type[LBOT] = 0;
    } else {
        if (h->slice_table[top_xy] == 0xFFFF)
            top_type = 0;
        if (h->slice_table[left_xy[LBOT]] == 0xFFFF)
            left_type[LTOP] = left_type[LBOT] = 0;
    }
2087 2088 2089
    sl->top_type        = top_type;
    sl->left_type[LTOP] = left_type[LTOP];
    sl->left_type[LBOT] = left_type[LBOT];
2090 2091 2092 2093

    if (IS_INTRA(mb_type))
        return 0;

2094
    fill_filter_caches_inter(h, sl, mb_type, top_xy, left_xy,
2095
                             top_type, left_type, mb_xy, 0);
2096
    if (sl->list_count == 2)
2097
        fill_filter_caches_inter(h, sl, mb_type, top_xy, left_xy,
2098 2099 2100
                                 top_type, left_type, mb_xy, 1);

    nnz       = h->non_zero_count[mb_xy];
2101
    nnz_cache = sl->non_zero_count_cache;
2102 2103 2104 2105
    AV_COPY32(&nnz_cache[4 + 8 * 1], &nnz[0]);
    AV_COPY32(&nnz_cache[4 + 8 * 2], &nnz[4]);
    AV_COPY32(&nnz_cache[4 + 8 * 3], &nnz[8]);
    AV_COPY32(&nnz_cache[4 + 8 * 4], &nnz[12]);
2106
    sl->cbp = h->cbp_table[mb_xy];
2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122

    if (top_type) {
        nnz = h->non_zero_count[top_xy];
        AV_COPY32(&nnz_cache[4 + 8 * 0], &nnz[3 * 4]);
    }

    if (left_type[LTOP]) {
        nnz = h->non_zero_count[left_xy[LTOP]];
        nnz_cache[3 + 8 * 1] = nnz[3 + 0 * 4];
        nnz_cache[3 + 8 * 2] = nnz[3 + 1 * 4];
        nnz_cache[3 + 8 * 3] = nnz[3 + 2 * 4];
        nnz_cache[3 + 8 * 4] = nnz[3 + 3 * 4];
    }

    /* CAVLC 8x8dct requires NNZ values for residual decoding that differ
     * from what the loop filter needs */
2123
    if (!CABAC(h) && h->ps.pps->transform_8x8_mode) {
2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142
        if (IS_8x8DCT(top_type)) {
            nnz_cache[4 + 8 * 0] =
            nnz_cache[5 + 8 * 0] = (h->cbp_table[top_xy] & 0x4000) >> 12;
            nnz_cache[6 + 8 * 0] =
            nnz_cache[7 + 8 * 0] = (h->cbp_table[top_xy] & 0x8000) >> 12;
        }
        if (IS_8x8DCT(left_type[LTOP])) {
            nnz_cache[3 + 8 * 1] =
            nnz_cache[3 + 8 * 2] = (h->cbp_table[left_xy[LTOP]] & 0x2000) >> 12; // FIXME check MBAFF
        }
        if (IS_8x8DCT(left_type[LBOT])) {
            nnz_cache[3 + 8 * 3] =
            nnz_cache[3 + 8 * 4] = (h->cbp_table[left_xy[LBOT]] & 0x8000) >> 12; // FIXME check MBAFF
        }

        if (IS_8x8DCT(mb_type)) {
            nnz_cache[scan8[0]] =
            nnz_cache[scan8[1]] =
            nnz_cache[scan8[2]] =
2143
            nnz_cache[scan8[3]] = (sl->cbp & 0x1000) >> 12;
2144 2145 2146 2147

            nnz_cache[scan8[0 + 4]] =
            nnz_cache[scan8[1 + 4]] =
            nnz_cache[scan8[2 + 4]] =
2148
            nnz_cache[scan8[3 + 4]] = (sl->cbp & 0x2000) >> 12;
2149 2150 2151 2152

            nnz_cache[scan8[0 + 8]] =
            nnz_cache[scan8[1 + 8]] =
            nnz_cache[scan8[2 + 8]] =
2153
            nnz_cache[scan8[3 + 8]] = (sl->cbp & 0x4000) >> 12;
2154 2155 2156 2157

            nnz_cache[scan8[0 + 12]] =
            nnz_cache[scan8[1 + 12]] =
            nnz_cache[scan8[2 + 12]] =
2158
            nnz_cache[scan8[3 + 12]] = (sl->cbp & 0x8000) >> 12;
2159 2160 2161 2162 2163 2164
        }
    }

    return 0;
}

2165
static void loop_filter(const H264Context *h, H264SliceContext *sl, int start_x, int end_x)
2166 2167 2168
{
    uint8_t *dest_y, *dest_cb, *dest_cr;
    int linesize, uvlinesize, mb_x, mb_y;
2169
    const int end_mb_y       = sl->mb_y + FRAME_MBAFF(h);
2170
    const int old_slice_type = sl->slice_type;
2171 2172 2173
    const int pixel_shift    = h->pixel_shift;
    const int block_h        = 16 >> h->chroma_y_shift;

2174 2175 2176
    if (h->postpone_filter)
        return;

2177
    if (sl->deblocking_filter) {
2178 2179 2180
        for (mb_x = start_x; mb_x < end_x; mb_x++)
            for (mb_y = end_mb_y - FRAME_MBAFF(h); mb_y <= end_mb_y; mb_y++) {
                int mb_xy, mb_type;
2181
                mb_xy         = sl->mb_xy = mb_x + mb_y * h->mb_stride;
2182 2183 2184
                mb_type       = h->cur_pic.mb_type[mb_xy];

                if (FRAME_MBAFF(h))
2185
                    sl->mb_mbaff               =
2186
                    sl->mb_field_decoding_flag = !!IS_INTERLACED(mb_type);
2187

2188 2189
                sl->mb_x = mb_x;
                sl->mb_y = mb_y;
2190
                dest_y  = h->cur_pic.f->data[0] +
2191
                          ((mb_x << pixel_shift) + mb_y * sl->linesize) * 16;
2192
                dest_cb = h->cur_pic.f->data[1] +
2193
                          (mb_x << pixel_shift) * (8 << CHROMA444(h)) +
2194
                          mb_y * sl->uvlinesize * block_h;
2195
                dest_cr = h->cur_pic.f->data[2] +
2196
                          (mb_x << pixel_shift) * (8 << CHROMA444(h)) +
2197
                          mb_y * sl->uvlinesize * block_h;
2198 2199
                // FIXME simplify above

2200
                if (MB_FIELD(sl)) {
2201 2202
                    linesize   = sl->mb_linesize   = sl->linesize   * 2;
                    uvlinesize = sl->mb_uvlinesize = sl->uvlinesize * 2;
2203
                    if (mb_y & 1) { // FIXME move out of this function?
2204 2205 2206
                        dest_y  -= sl->linesize   * 15;
                        dest_cb -= sl->uvlinesize * (block_h - 1);
                        dest_cr -= sl->uvlinesize * (block_h - 1);
2207 2208
                    }
                } else {
2209 2210
                    linesize   = sl->mb_linesize   = sl->linesize;
                    uvlinesize = sl->mb_uvlinesize = sl->uvlinesize;
2211
                }
2212
                backup_mb_border(h, sl, dest_y, dest_cb, dest_cr, linesize,
2213
                                 uvlinesize, 0);
2214
                if (fill_filter_caches(h, sl, mb_type))
2215
                    continue;
2216 2217
                sl->chroma_qp[0] = get_chroma_qp(h->ps.pps, 0, h->cur_pic.qscale_table[mb_xy]);
                sl->chroma_qp[1] = get_chroma_qp(h->ps.pps, 1, h->cur_pic.qscale_table[mb_xy]);
2218 2219

                if (FRAME_MBAFF(h)) {
2220
                    ff_h264_filter_mb(h, sl, mb_x, mb_y, dest_y, dest_cb, dest_cr,
2221 2222
                                      linesize, uvlinesize);
                } else {
2223
                    ff_h264_filter_mb_fast(h, sl, mb_x, mb_y, dest_y, dest_cb,
2224 2225 2226 2227
                                           dest_cr, linesize, uvlinesize);
                }
            }
    }
2228
    sl->slice_type  = old_slice_type;
2229 2230
    sl->mb_x         = end_x;
    sl->mb_y         = end_mb_y - FRAME_MBAFF(h);
2231 2232
    sl->chroma_qp[0] = get_chroma_qp(h->ps.pps, 0, sl->qscale);
    sl->chroma_qp[1] = get_chroma_qp(h->ps.pps, 1, sl->qscale);
2233 2234
}

2235
static void predict_field_decoding_flag(const H264Context *h, H264SliceContext *sl)
2236
{
2237
    const int mb_xy = sl->mb_x + sl->mb_y * h->mb_stride;
2238
    int mb_type     = (h->slice_table[mb_xy - 1] == sl->slice_num) ?
2239
                      h->cur_pic.mb_type[mb_xy - 1] :
2240
                      (h->slice_table[mb_xy - h->mb_stride] == sl->slice_num) ?
2241
                      h->cur_pic.mb_type[mb_xy - h->mb_stride] : 0;
2242
    sl->mb_mbaff    = sl->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
2243 2244 2245 2246 2247
}

/**
 * Draw edges and report progress for the last MB row.
 */
2248
static void decode_finish_row(const H264Context *h, H264SliceContext *sl)
2249
{
2250
    int top            = 16 * (sl->mb_y      >> FIELD_PICTURE(h));
2251 2252 2253 2254
    int pic_height     = 16 *  h->mb_height >> FIELD_PICTURE(h);
    int height         =  16      << FRAME_MBAFF(h);
    int deblock_border = (16 + 4) << FRAME_MBAFF(h);

2255
    if (sl->deblocking_filter) {
2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269
        if ((top + height) >= pic_height)
            height += deblock_border;
        top -= deblock_border;
    }

    if (top >= pic_height || (top + height) < 0)
        return;

    height = FFMIN(height, pic_height - top);
    if (top < 0) {
        height = top + height;
        top    = 0;
    }

2270
    ff_h264_draw_horiz_band(h, sl, top, height);
2271 2272 2273 2274 2275 2276 2277 2278

    if (h->droppable)
        return;

    ff_thread_report_progress(&h->cur_pic_ptr->tf, top + height - 1,
                              h->picture_structure == PICT_BOTTOM_FIELD);
}

2279
static void er_add_slice(H264SliceContext *sl,
2280
                         int startx, int starty,
2281 2282 2283
                         int endx, int endy, int status)
{
#if CONFIG_ERROR_RESILIENCE
2284
    ERContext *er = &sl->er;
2285

2286 2287 2288
    if (!sl->h264->enable_er)
        return;

2289
    er->ref_count = sl->ref_count[0];
2290 2291 2292 2293 2294 2295
    ff_er_add_slice(er, startx, starty, endx, endy, status);
#endif
}

static int decode_slice(struct AVCodecContext *avctx, void *arg)
{
2296
    H264SliceContext *sl = arg;
2297
    const H264Context *h = sl->h264;
2298
    int lf_x_start = sl->mb_x;
2299
    int orig_deblock = sl->deblocking_filter;
2300 2301
    int ret;

2302 2303
    sl->linesize   = h->cur_pic_ptr->f->linesize[0];
    sl->uvlinesize = h->cur_pic_ptr->f->linesize[1];
2304 2305

    ret = alloc_scratch_buffers(sl, sl->linesize);
2306 2307
    if (ret < 0)
        return ret;
2308

2309
    sl->mb_skip_run = -1;
2310

2311 2312 2313
    if (h->postpone_filter)
        sl->deblocking_filter = 0;

2314
    sl->is_complex = FRAME_MBAFF(h) || h->picture_structure != PICT_FRAME ||
2315
                     (CONFIG_GRAY && (h->flags & AV_CODEC_FLAG_GRAY));
2316

2317
    if (h->ps.pps->cabac) {
2318
        /* realign */
2319
        align_get_bits(&sl->gb);
2320 2321

        /* init cabac */
2322
        ff_init_cabac_decoder(&sl->cabac,
2323 2324
                              sl->gb.buffer + get_bits_count(&sl->gb) / 8,
                              (get_bits_left(&sl->gb) + 7) / 8);
2325

2326
        ff_h264_init_cabac_states(h, sl);
2327 2328 2329

        for (;;) {
            // START_TIMER
2330 2331 2332 2333 2334 2335 2336 2337 2338
            int ret, eos;

            if (sl->mb_x + sl->mb_y * h->mb_width >= sl->next_slice_idx) {
                av_log(h->avctx, AV_LOG_ERROR, "Slice overlaps with next at %d\n",
                       sl->next_slice_idx);
                return AVERROR_INVALIDDATA;
            }

            ret = ff_h264_decode_mb_cabac(h, sl);
2339 2340 2341
            // STOP_TIMER("decode_mb_cabac")

            if (ret >= 0)
2342
                ff_h264_hl_decode_mb(h, sl);
2343 2344 2345

            // FIXME optimal? or let mb_decode decode 16x32 ?
            if (ret >= 0 && FRAME_MBAFF(h)) {
2346
                sl->mb_y++;
2347

2348
                ret = ff_h264_decode_mb_cabac(h, sl);
2349 2350

                if (ret >= 0)
2351
                    ff_h264_hl_decode_mb(h, sl);
2352
                sl->mb_y--;
2353
            }
2354
            eos = get_cabac_terminate(&sl->cabac);
2355 2356

            if ((h->workaround_bugs & FF_BUG_TRUNCATED) &&
2357
                sl->cabac.bytestream > sl->cabac.bytestream_end + 2) {
2358
                er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x - 1,
2359 2360 2361
                             sl->mb_y, ER_MB_END);
                if (sl->mb_x >= lf_x_start)
                    loop_filter(h, sl, lf_x_start, sl->mb_x + 1);
2362
                goto finish;
2363
            }
2364
            if (ret < 0 || sl->cabac.bytestream > sl->cabac.bytestream_end + 2) {
2365 2366
                av_log(h->avctx, AV_LOG_ERROR,
                       "error while decoding MB %d %d, bytestream %td\n",
2367
                       sl->mb_x, sl->mb_y,
2368
                       sl->cabac.bytestream_end - sl->cabac.bytestream);
2369
                er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x,
2370
                             sl->mb_y, ER_MB_ERROR);
2371 2372 2373
                return AVERROR_INVALIDDATA;
            }

2374 2375 2376
            if (++sl->mb_x >= h->mb_width) {
                loop_filter(h, sl, lf_x_start, sl->mb_x);
                sl->mb_x = lf_x_start = 0;
2377
                decode_finish_row(h, sl);
2378
                ++sl->mb_y;
2379
                if (FIELD_OR_MBAFF_PICTURE(h)) {
2380 2381
                    ++sl->mb_y;
                    if (FRAME_MBAFF(h) && sl->mb_y < h->mb_height)
2382
                        predict_field_decoding_flag(h, sl);
2383 2384 2385
                }
            }

2386
            if (eos || sl->mb_y >= h->mb_height) {
2387
                ff_tlog(h->avctx, "slice end %d %d\n",
2388
                        get_bits_count(&sl->gb), sl->gb.size_in_bits);
2389
                er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x - 1,
2390 2391 2392
                             sl->mb_y, ER_MB_END);
                if (sl->mb_x > lf_x_start)
                    loop_filter(h, sl, lf_x_start, sl->mb_x);
2393
                goto finish;
2394 2395 2396 2397
            }
        }
    } else {
        for (;;) {
2398 2399 2400 2401 2402 2403 2404 2405 2406
            int ret;

            if (sl->mb_x + sl->mb_y * h->mb_width >= sl->next_slice_idx) {
                av_log(h->avctx, AV_LOG_ERROR, "Slice overlaps with next at %d\n",
                       sl->next_slice_idx);
                return AVERROR_INVALIDDATA;
            }

            ret = ff_h264_decode_mb_cavlc(h, sl);
2407 2408

            if (ret >= 0)
2409
                ff_h264_hl_decode_mb(h, sl);
2410 2411 2412

            // FIXME optimal? or let mb_decode decode 16x32 ?
            if (ret >= 0 && FRAME_MBAFF(h)) {
2413
                sl->mb_y++;
2414
                ret = ff_h264_decode_mb_cavlc(h, sl);
2415 2416

                if (ret >= 0)
2417
                    ff_h264_hl_decode_mb(h, sl);
2418
                sl->mb_y--;
2419 2420 2421 2422
            }

            if (ret < 0) {
                av_log(h->avctx, AV_LOG_ERROR,
2423
                       "error while decoding MB %d %d\n", sl->mb_x, sl->mb_y);
2424
                er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x,
2425
                             sl->mb_y, ER_MB_ERROR);
2426 2427 2428
                return ret;
            }

2429 2430 2431
            if (++sl->mb_x >= h->mb_width) {
                loop_filter(h, sl, lf_x_start, sl->mb_x);
                sl->mb_x = lf_x_start = 0;
2432
                decode_finish_row(h, sl);
2433
                ++sl->mb_y;
2434
                if (FIELD_OR_MBAFF_PICTURE(h)) {
2435 2436
                    ++sl->mb_y;
                    if (FRAME_MBAFF(h) && sl->mb_y < h->mb_height)
2437
                        predict_field_decoding_flag(h, sl);
2438
                }
2439
                if (sl->mb_y >= h->mb_height) {
2440
                    ff_tlog(h->avctx, "slice end %d %d\n",
2441
                            get_bits_count(&sl->gb), sl->gb.size_in_bits);
2442

2443
                    if (get_bits_left(&sl->gb) == 0) {
2444
                        er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y,
2445
                                     sl->mb_x - 1, sl->mb_y, ER_MB_END);
2446

2447
                        goto finish;
2448
                    } else {
2449
                        er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y,
2450
                                     sl->mb_x - 1, sl->mb_y, ER_MB_END);
2451 2452 2453 2454 2455 2456

                        return AVERROR_INVALIDDATA;
                    }
                }
            }

2457
            if (get_bits_left(&sl->gb) <= 0 && sl->mb_skip_run <= 0) {
2458
                ff_tlog(h->avctx, "slice end %d %d\n",
2459
                        get_bits_count(&sl->gb), sl->gb.size_in_bits);
2460

2461
                if (get_bits_left(&sl->gb) == 0) {
2462
                    er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y,
2463 2464 2465
                                 sl->mb_x - 1, sl->mb_y, ER_MB_END);
                    if (sl->mb_x > lf_x_start)
                        loop_filter(h, sl, lf_x_start, sl->mb_x);
2466

2467
                    goto finish;
2468
                } else {
2469
                    er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x,
2470
                                 sl->mb_y, ER_MB_ERROR);
2471 2472 2473 2474 2475 2476

                    return AVERROR_INVALIDDATA;
                }
            }
        }
    }
2477 2478 2479 2480

finish:
    sl->deblocking_filter = orig_deblock;
    return 0;
2481 2482 2483 2484 2485 2486 2487
}

/**
 * Call decode_slice() for each context.
 *
 * @param h h264 master context
 */
2488
int ff_h264_execute_decode_slices(H264Context *h)
2489 2490
{
    AVCodecContext *const avctx = h->avctx;
2491
    H264SliceContext *sl;
2492 2493
    int context_count = h->nb_slice_ctx_queued;
    int ret = 0;
2494
    int i, j;
2495

2496
    if (h->avctx->hwaccel || context_count < 1)
2497 2498
        return 0;
    if (context_count == 1) {
2499 2500

        h->slice_ctx[0].next_slice_idx = h->mb_width * h->mb_height;
2501
        h->postpone_filter = 0;
2502 2503

        ret = decode_slice(avctx, &h->slice_ctx[0]);
2504
        h->mb_y = h->slice_ctx[0].mb_y;
2505 2506
        if (ret < 0)
            goto finish;
2507
    } else {
2508 2509 2510 2511
        for (i = 0; i < context_count; i++) {
            int next_slice_idx = h->mb_width * h->mb_height;
            int slice_idx;

2512 2513
            sl                 = &h->slice_ctx[i];
            sl->er.error_count = 0;
2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525

            /* make sure none of those slices overlap */
            slice_idx = sl->mb_y * h->mb_width + sl->mb_x;
            for (j = 0; j < context_count; j++) {
                H264SliceContext *sl2 = &h->slice_ctx[j];
                int        slice_idx2 = sl2->mb_y * h->mb_width + sl2->mb_x;

                if (i == j || slice_idx2 < slice_idx)
                    continue;
                next_slice_idx = FFMIN(next_slice_idx, slice_idx2);
            }
            sl->next_slice_idx = next_slice_idx;
2526 2527
        }

2528 2529
        avctx->execute(avctx, decode_slice, h->slice_ctx,
                       NULL, context_count, sizeof(h->slice_ctx[0]));
2530 2531

        /* pull back stuff from slices to master context */
2532 2533
        sl                   = &h->slice_ctx[context_count - 1];
        h->mb_y              = sl->mb_y;
2534
        for (i = 1; i < context_count; i++)
2535
            h->slice_ctx[0].er.error_count += h->slice_ctx[i].er.error_count;
2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553

        if (h->postpone_filter) {
            h->postpone_filter = 0;

            for (i = 0; i < context_count; i++) {
                int y_end, x_end;

                sl = &h->slice_ctx[i];
                y_end = FFMIN(sl->mb_y + 1, h->mb_height);
                x_end = (sl->mb_y >= h->mb_height) ? h->mb_width : sl->mb_x;

                for (j = sl->resync_mb_y; j < y_end; j += 1 + FIELD_OR_MBAFF_PICTURE(h)) {
                    sl->mb_y = j;
                    loop_filter(h, sl, j > sl->resync_mb_y ? 0 : sl->resync_mb_x,
                                j == y_end - 1 ? x_end : h->mb_width);
                }
            }
        }
2554 2555
    }

2556 2557 2558
finish:
    h->nb_slice_ctx_queued = 0;
    return ret;
2559
}