mjpegdec.c 85.7 KB
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/*
 * MJPEG decoder
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 * Copyright (c) 2000, 2001 Fabrice Bellard
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 * Copyright (c) 2003 Alex Beregszaszi
 * Copyright (c) 2003-2004 Michael Niedermayer
 *
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 * Support for external huffman table, various fixes (AVID workaround),
 * aspecting, new decode_frame mechanism and apple mjpeg-b support
 *                                  by Alex Beregszaszi
 *
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 * This file is part of FFmpeg.
 *
 * FFmpeg 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.
 *
 * FFmpeg 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 FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
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 * @file
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 * MJPEG decoder.
 */

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#include "libavutil/imgutils.h"
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#include "libavutil/avassert.h"
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#include "libavutil/opt.h"
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#include "avcodec.h"
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#include "blockdsp.h"
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#include "copy_block.h"
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#include "idctdsp.h"
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#include "internal.h"
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#include "jpegtables.h"
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#include "mjpeg.h"
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#include "mjpegdec.h"
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#include "jpeglsdec.h"
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#include "put_bits.h"
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#include "tiff.h"
#include "exif.h"
#include "bytestream.h"
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static int build_vlc(VLC *vlc, const uint8_t *bits_table,
                     const uint8_t *val_table, int nb_codes,
                     int use_static, int is_ac)
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{
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    uint8_t huff_size[256] = { 0 };
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    uint16_t huff_code[256];
    uint16_t huff_sym[256];
    int i;
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    av_assert0(nb_codes <= 256);
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    ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
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    for (i = 0; i < 256; i++)
        huff_sym[i] = i + 16 * is_ac;
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    if (is_ac)
        huff_sym[0] = 16 * 256;
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    return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
                              huff_code, 2, 2, huff_sym, 2, 2, use_static);
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}

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static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
{
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    build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
              avpriv_mjpeg_val_dc, 12, 0, 0);
    build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
              avpriv_mjpeg_val_dc, 12, 0, 0);
    build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
              avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
    build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
              avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
    build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
              avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
    build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
              avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
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}

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static void parse_avid(MJpegDecodeContext *s, uint8_t *buf, int len)
{
    s->buggy_avid = 1;
    if (len > 14 && buf[12] == 1) /* 1 - NTSC */
        s->interlace_polarity = 1;
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    if (len > 14 && buf[12] == 2) /* 2 - PAL */
        s->interlace_polarity = 0;
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    if (s->avctx->debug & FF_DEBUG_PICT_INFO)
        av_log(s->avctx, AV_LOG_INFO, "AVID: len:%d %d\n", len, len > 14 ? buf[12] : -1);
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}

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av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
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{
    MJpegDecodeContext *s = avctx->priv_data;

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    if (!s->picture_ptr) {
        s->picture = av_frame_alloc();
        if (!s->picture)
            return AVERROR(ENOMEM);
        s->picture_ptr = s->picture;
    }
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    s->avctx = avctx;
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    ff_blockdsp_init(&s->bdsp, avctx);
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    ff_hpeldsp_init(&s->hdsp, avctx->flags);
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    ff_idctdsp_init(&s->idsp, avctx);
    ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
                      ff_zigzag_direct);
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    s->buffer_size   = 0;
    s->buffer        = NULL;
    s->start_code    = -1;
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    s->first_picture = 1;
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    s->got_picture   = 0;
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    s->org_height    = avctx->coded_height;
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    avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
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    avctx->colorspace = AVCOL_SPC_BT470BG;
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    build_basic_mjpeg_vlc(s);
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    if (s->extern_huff) {
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        av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
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        init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
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        if (ff_mjpeg_decode_dht(s)) {
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            av_log(avctx, AV_LOG_ERROR,
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                   "error using external huffman table, switching back to internal\n");
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            build_basic_mjpeg_vlc(s);
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        }
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    }
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    if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
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        s->interlace_polarity = 1;           /* bottom field first */
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        av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
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    } else if (avctx->field_order == AV_FIELD_UNKNOWN) {
        if (avctx->codec_tag == AV_RL32("MJPG"))
            s->interlace_polarity = 1;
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    }
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    if (   avctx->extradata_size > 8
        && AV_RL32(avctx->extradata) == 0x2C
        && AV_RL32(avctx->extradata+4) == 0x18) {
        parse_avid(s, avctx->extradata, avctx->extradata_size);
    }

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    if (avctx->codec->id == AV_CODEC_ID_AMV)
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        s->flipped = 1;
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    return 0;
}


/* quantize tables */
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int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
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{
    int len, index, i, j;

    len = get_bits(&s->gb, 16) - 2;

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    if (8*len > get_bits_left(&s->gb)) {
        av_log(s->avctx, AV_LOG_ERROR, "dqt: len %d is too large\n", len);
        return AVERROR_INVALIDDATA;
    }

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    while (len >= 65) {
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        int pr = get_bits(&s->gb, 4);
        if (pr > 1) {
            av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
            return AVERROR_INVALIDDATA;
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        }
        index = get_bits(&s->gb, 4);
        if (index >= 4)
            return -1;
        av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
        /* read quant table */
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        for (i = 0; i < 64; i++) {
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            j = s->scantable.permutated[i];
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            s->quant_matrixes[index][j] = get_bits(&s->gb, pr ? 16 : 8);
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        }

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        // XXX FIXME finetune, and perhaps add dc too
        s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
                                 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
        av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
               index, s->qscale[index]);
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        len -= 1 + 64 * (1+pr);
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    }
    return 0;
}

/* decode huffman tables and build VLC decoders */
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int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
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{
    int len, index, i, class, n, v, code_max;
    uint8_t bits_table[17];
    uint8_t val_table[256];
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    int ret = 0;
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    len = get_bits(&s->gb, 16) - 2;

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    if (8*len > get_bits_left(&s->gb)) {
        av_log(s->avctx, AV_LOG_ERROR, "dht: len %d is too large\n", len);
        return AVERROR_INVALIDDATA;
    }

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    while (len > 0) {
        if (len < 17)
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            return AVERROR_INVALIDDATA;
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        class = get_bits(&s->gb, 4);
        if (class >= 2)
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            return AVERROR_INVALIDDATA;
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        index = get_bits(&s->gb, 4);
        if (index >= 4)
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            return AVERROR_INVALIDDATA;
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        n = 0;
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        for (i = 1; i <= 16; i++) {
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            bits_table[i] = get_bits(&s->gb, 8);
            n += bits_table[i];
        }
        len -= 17;
        if (len < n || n > 256)
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            return AVERROR_INVALIDDATA;
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        code_max = 0;
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        for (i = 0; i < n; i++) {
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            v = get_bits(&s->gb, 8);
            if (v > code_max)
                code_max = v;
            val_table[i] = v;
        }
        len -= n;

        /* build VLC and flush previous vlc if present */
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        ff_free_vlc(&s->vlcs[class][index]);
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        av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
               class, index, code_max + 1);
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        if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
                             code_max + 1, 0, class > 0)) < 0)
            return ret;
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        if (class > 0) {
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            ff_free_vlc(&s->vlcs[2][index]);
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            if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
                                 code_max + 1, 0, 0)) < 0)
                return ret;
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        }
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    }
    return 0;
}

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int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
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{
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    int len, nb_components, i, width, height, bits, ret;
    unsigned pix_fmt_id;
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    int h_count[MAX_COMPONENTS] = { 0 };
    int v_count[MAX_COMPONENTS] = { 0 };
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    s->cur_scan = 0;
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    memset(s->upscale_h, 0, sizeof(s->upscale_h));
    memset(s->upscale_v, 0, sizeof(s->upscale_v));
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    /* XXX: verify len field validity */
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    len     = get_bits(&s->gb, 16);
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    s->avctx->bits_per_raw_sample =
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    bits    = get_bits(&s->gb, 8);
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    if (bits > 16 || bits < 1) {
        av_log(s->avctx, AV_LOG_ERROR, "bits %d is invalid\n", bits);
        return AVERROR_INVALIDDATA;
    }

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    if (s->pegasus_rct)
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        bits = 9;
    if (bits == 9 && !s->pegasus_rct)
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        s->rct  = 1;    // FIXME ugly
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    if(s->lossless && s->avctx->lowres){
        av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
        return -1;
    }

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    height = get_bits(&s->gb, 16);
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    width  = get_bits(&s->gb, 16);
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    // HACK for odd_height.mov
    if (s->interlaced && s->width == width && s->height == height + 1)
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        height= s->height;

    av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
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    if (av_image_check_size(width, height, 0, s->avctx))
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        return AVERROR_INVALIDDATA;
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    nb_components = get_bits(&s->gb, 8);
    if (nb_components <= 0 ||
        nb_components > MAX_COMPONENTS)
        return -1;
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    if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
        if (nb_components != s->nb_components) {
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            av_log(s->avctx, AV_LOG_ERROR,
                   "nb_components changing in interlaced picture\n");
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            return AVERROR_INVALIDDATA;
        }
    }
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    if (s->ls && !(bits <= 8 || nb_components == 1)) {
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        avpriv_report_missing_feature(s->avctx,
                                      "JPEG-LS that is not <= 8 "
                                      "bits/component or 16-bit gray");
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        return AVERROR_PATCHWELCOME;
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    }
    s->nb_components = nb_components;
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    s->h_max         = 1;
    s->v_max         = 1;
    for (i = 0; i < nb_components; i++) {
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        /* component id */
        s->component_id[i] = get_bits(&s->gb, 8) - 1;
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        h_count[i]         = get_bits(&s->gb, 4);
        v_count[i]         = get_bits(&s->gb, 4);
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        /* compute hmax and vmax (only used in interleaved case) */
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        if (h_count[i] > s->h_max)
            s->h_max = h_count[i];
        if (v_count[i] > s->v_max)
            s->v_max = v_count[i];
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        s->quant_index[i] = get_bits(&s->gb, 8);
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        if (s->quant_index[i] >= 4) {
            av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
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            return AVERROR_INVALIDDATA;
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        }
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        if (!h_count[i] || !v_count[i]) {
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            av_log(s->avctx, AV_LOG_ERROR,
                   "Invalid sampling factor in component %d %d:%d\n",
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                   i, h_count[i], v_count[i]);
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            return AVERROR_INVALIDDATA;
        }

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        av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
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               i, h_count[i], v_count[i],
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               s->component_id[i], s->quant_index[i]);
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    }
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    if (   nb_components == 4
        && s->component_id[0] == 'C' - 1
        && s->component_id[1] == 'M' - 1
        && s->component_id[2] == 'Y' - 1
        && s->component_id[3] == 'K' - 1)
        s->adobe_transform = 0;
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    if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
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        avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
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        return AVERROR_PATCHWELCOME;
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    }


    /* if different size, realloc/alloc picture */
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    if (width != s->width || height != s->height || bits != s->bits ||
        memcmp(s->h_count, h_count, sizeof(h_count))                ||
        memcmp(s->v_count, v_count, sizeof(v_count))) {
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        s->width      = width;
        s->height     = height;
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        s->bits       = bits;
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        memcpy(s->h_count, h_count, sizeof(h_count));
        memcpy(s->v_count, v_count, sizeof(v_count));
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        s->interlaced = 0;
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        s->got_picture = 0;
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        /* test interlaced mode */
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        if (s->first_picture   &&
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            (s->multiscope != 2 || s->avctx->time_base.den >= 25 * s->avctx->time_base.num) &&
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            s->org_height != 0 &&
            s->height < ((s->org_height * 3) / 4)) {
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            s->interlaced                    = 1;
            s->bottom_field                  = s->interlace_polarity;
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            s->picture_ptr->interlaced_frame = 1;
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            s->picture_ptr->top_field_first  = !s->interlace_polarity;
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            height *= 2;
        }

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        ret = ff_set_dimensions(s->avctx, width, height);
        if (ret < 0)
            return ret;
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        s->first_picture = 0;
    }

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    if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
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        if (s->progressive) {
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            avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
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            return AVERROR_INVALIDDATA;
        }
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    } else{
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        if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
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            s->rgb = 1;
        else if (!s->lossless)
            s->rgb = 0;
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    /* XXX: not complete test ! */
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    pix_fmt_id = ((unsigned)s->h_count[0] << 28) | (s->v_count[0] << 24) |
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                 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
                 (s->h_count[2] << 12) | (s->v_count[2] <<  8) |
                 (s->h_count[3] <<  4) |  s->v_count[3];
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    av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
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    /* NOTE we do not allocate pictures large enough for the possible
     * padding of h/v_count being 4 */
    if (!(pix_fmt_id & 0xD0D0D0D0))
        pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
    if (!(pix_fmt_id & 0x0D0D0D0D))
        pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;

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    for (i = 0; i < 8; i++) {
        int j = 6 + (i&1) - (i&6);
        int is = (pix_fmt_id >> (4*i)) & 0xF;
        int js = (pix_fmt_id >> (4*j)) & 0xF;
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        if (is == 1 && js != 2 && (i < 2 || i > 5))
            js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
        if (is == 1 && js != 2 && (i < 2 || i > 5))
            js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;

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        if (is == 1 && js == 2) {
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            if (i & 1) s->upscale_h[j/2] = 1;
            else       s->upscale_v[j/2] = 1;
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        }
    }

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    switch (pix_fmt_id) {
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    case 0x11111100:
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        if (s->rgb)
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            s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
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        else {
            if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
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                s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
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            } else {
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                if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
                else              s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
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            s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
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            }
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        }
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        av_assert0(s->nb_components == 3);
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        break;
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    case 0x11111111:
        if (s->rgb)
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            s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
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        else {
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            if (s->adobe_transform == 0 && s->bits <= 8) {
                s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
            } else {
                s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
                s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
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            }
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        }
        av_assert0(s->nb_components == 4);
        break;
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    case 0x22111122:
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    case 0x22111111:
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        if (s->adobe_transform == 0 && s->bits <= 8) {
            s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
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            s->upscale_v[1] = s->upscale_v[2] = 1;
            s->upscale_h[1] = s->upscale_h[2] = 1;
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        } else if (s->adobe_transform == 2 && s->bits <= 8) {
            s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
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            s->upscale_v[1] = s->upscale_v[2] = 1;
            s->upscale_h[1] = s->upscale_h[2] = 1;
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            s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
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        } else {
            if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
            else              s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
            s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
        }
        av_assert0(s->nb_components == 4);
        break;
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    case 0x12121100:
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    case 0x22122100:
    case 0x21211100:
    case 0x22211200:
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        if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
        else
            goto unk_pixfmt;
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        s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
        break;
    case 0x22221100:
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    case 0x22112200:
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    case 0x11222200:
        if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
        else
            goto unk_pixfmt;
        s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
        break;
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    case 0x11000000:
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    case 0x13000000:
    case 0x14000000:
    case 0x31000000:
    case 0x33000000:
    case 0x34000000:
    case 0x41000000:
    case 0x43000000:
    case 0x44000000:
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        if(s->bits <= 8)
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            s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
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        else
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            s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
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        break;
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    case 0x12111100:
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    case 0x14121200:
508
    case 0x14111100:
509
    case 0x22211100:
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    case 0x22112100:
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        if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
            if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
            else
                goto unk_pixfmt;
515
            s->upscale_v[0] = s->upscale_v[1] = 1;
516
        } else {
517
            if (pix_fmt_id == 0x14111100)
518
                s->upscale_v[1] = s->upscale_v[2] = 1;
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            if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
            else
                goto unk_pixfmt;
            s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
        }
524
        break;
525
    case 0x21111100:
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        if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
            if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
            else
                goto unk_pixfmt;
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            s->upscale_h[0] = s->upscale_h[1] = 1;
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        } else {
            if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
            else              s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
            s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
        }
536
        break;
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    case 0x31111100:
        if (s->bits > 8)
            goto unk_pixfmt;
        s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
        s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
        s->upscale_h[1] = s->upscale_h[2] = 2;
        break;
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    case 0x22121100:
    case 0x22111200:
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        if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
        else
            goto unk_pixfmt;
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        s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
        break;
551
    case 0x22111100:
552
    case 0x42111100:
553
    case 0x24111100:
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        if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
        else              s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
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        s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
557
        if (pix_fmt_id == 0x42111100) {
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            if (s->bits > 8)
                goto unk_pixfmt;
560
            s->upscale_h[1] = s->upscale_h[2] = 1;
561
        } else if (pix_fmt_id == 0x24111100) {
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            if (s->bits > 8)
                goto unk_pixfmt;
564
            s->upscale_v[1] = s->upscale_v[2] = 1;
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        }
566
        break;
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    case 0x41111100:
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        if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
        else
            goto unk_pixfmt;
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        s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
        break;
573
    default:
574
unk_pixfmt:
575
        av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x bits:%d\n", pix_fmt_id, s->bits);
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        memset(s->upscale_h, 0, sizeof(s->upscale_h));
        memset(s->upscale_v, 0, sizeof(s->upscale_v));
578
        return AVERROR_PATCHWELCOME;
579
    }
580
    if ((AV_RB32(s->upscale_h) || AV_RB32(s->upscale_v)) && s->avctx->lowres) {
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        av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
        return AVERROR_PATCHWELCOME;
    }
584
    if (s->ls) {
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        memset(s->upscale_h, 0, sizeof(s->upscale_h));
        memset(s->upscale_v, 0, sizeof(s->upscale_v));
587
        if (s->nb_components == 3) {
588
            s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
589 590 591 592
        } else if (s->nb_components != 1) {
            av_log(s->avctx, AV_LOG_ERROR, "Unsupported number of components %d\n", s->nb_components);
            return AVERROR_PATCHWELCOME;
        } else if (s->palette_index && s->bits <= 8)
593
            s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
594
        else if (s->bits <= 8)
595
            s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
596
        else
597
            s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
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    }

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    s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
    if (!s->pix_desc) {
        av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
        return AVERROR_BUG;
    }

606
    av_frame_unref(s->picture_ptr);
607
    if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
608
        return -1;
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    s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
    s->picture_ptr->key_frame = 1;
    s->got_picture            = 1;
612

613
    for (i = 0; i < 4; i++)
614
        s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
615

616
    ff_dlog(s->avctx, "%d %d %d %d %d %d\n",
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            s->width, s->height, s->linesize[0], s->linesize[1],
            s->interlaced, s->avctx->height);
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620
    if (len != (8 + (3 * nb_components)))
621
        av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
622
    }
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    if (s->rgb && !s->lossless && !s->ls) {
        av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
        return AVERROR_PATCHWELCOME;
    }

629
    /* totally blank picture as progressive JPEG will only add details to it */
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    if (s->progressive) {
        int bw = (width  + s->h_max * 8 - 1) / (s->h_max * 8);
        int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
        for (i = 0; i < s->nb_components; i++) {
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            int size = bw * bh * s->h_count[i] * s->v_count[i];
            av_freep(&s->blocks[i]);
            av_freep(&s->last_nnz[i]);
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            s->blocks[i]       = av_mallocz_array(size, sizeof(**s->blocks));
            s->last_nnz[i]     = av_mallocz_array(size, sizeof(**s->last_nnz));
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            if (!s->blocks[i] || !s->last_nnz[i])
                return AVERROR(ENOMEM);
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            s->block_stride[i] = bw * s->h_count[i];
        }
        memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
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    }
    return 0;
}

static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
{
    int code;
    code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
652
    if (code < 0 || code > 16) {
653 654 655
        av_log(s->avctx, AV_LOG_WARNING,
               "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
               0, dc_index, &s->vlcs[0][dc_index]);
656
        return 0xfffff;
657 658
    }

659
    if (code)
660 661 662 663 664 665
        return get_xbits(&s->gb, code);
    else
        return 0;
}

/* decode block and dequantize */
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static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
667
                        int dc_index, int ac_index, int16_t *quant_matrix)
668 669 670 671 672
{
    int code, i, j, level, val;

    /* DC coef */
    val = mjpeg_decode_dc(s, dc_index);
673
    if (val == 0xfffff) {
674
        av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
675
        return AVERROR_INVALIDDATA;
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    }
    val = val * quant_matrix[0] + s->last_dc[component];
678
    val = FFMIN(val, 32767);
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    s->last_dc[component] = val;
    block[0] = val;
    /* AC coefs */
    i = 0;
683
    {OPEN_READER(re, &s->gb);
684
    do {
685
        UPDATE_CACHE(re, &s->gb);
686
        GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
687 688 689

        i += ((unsigned)code) >> 4;
            code &= 0xf;
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        if (code) {
            if (code > MIN_CACHE_BITS - 16)
692
                UPDATE_CACHE(re, &s->gb);
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694
            {
695 696 697
                int cache = GET_CACHE(re, &s->gb);
                int sign  = (~cache) >> 31;
                level     = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
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            }

700
            LAST_SKIP_BITS(re, &s->gb, code);
701

702
            if (i > 63) {
703
                av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
704
                return AVERROR_INVALIDDATA;
705
            }
706
            j        = s->scantable.permutated[i];
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            block[j] = level * quant_matrix[j];
        }
709
    } while (i < 63);
710
    CLOSE_READER(re, &s->gb);}
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    return 0;
}

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static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
716 717
                                 int component, int dc_index,
                                 int16_t *quant_matrix, int Al)
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{
    int val;
720
    s->bdsp.clear_block(block);
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    val = mjpeg_decode_dc(s, dc_index);
722
    if (val == 0xfffff) {
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        av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
724
        return AVERROR_INVALIDDATA;
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    }
726
    val = (val * (quant_matrix[0] << Al)) + s->last_dc[component];
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    s->last_dc[component] = val;
    block[0] = val;
    return 0;
}

732
/* decode block and dequantize - progressive JPEG version */
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static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
734 735
                                    uint8_t *last_nnz, int ac_index,
                                    int16_t *quant_matrix,
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                                    int ss, int se, int Al, int *EOBRUN)
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{
    int code, i, j, level, val, run;

740
    if (*EOBRUN) {
741 742 743
        (*EOBRUN)--;
        return 0;
    }
744

745 746 747 748 749
    {
        OPEN_READER(re, &s->gb);
        for (i = ss; ; i++) {
            UPDATE_CACHE(re, &s->gb);
            GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
750

751 752 753 754 755 756
            run = ((unsigned) code) >> 4;
            code &= 0xF;
            if (code) {
                i += run;
                if (code > MIN_CACHE_BITS - 16)
                    UPDATE_CACHE(re, &s->gb);
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758 759 760 761
                {
                    int cache = GET_CACHE(re, &s->gb);
                    int sign  = (~cache) >> 31;
                    level     = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
762
                }
763 764 765

                LAST_SKIP_BITS(re, &s->gb, code);

766
                if (i >= se) {
767 768
                    if (i == se) {
                        j = s->scantable.permutated[se];
769
                        block[j] = level * (quant_matrix[j] << Al);
770 771 772
                        break;
                    }
                    av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
773
                    return AVERROR_INVALIDDATA;
774
                }
775
                j = s->scantable.permutated[i];
776
                block[j] = level * (quant_matrix[j] << Al);
777 778 779 780 781
            } else {
                if (run == 0xF) {// ZRL - skip 15 coefficients
                    i += 15;
                    if (i >= se) {
                        av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
782
                        return AVERROR_INVALIDDATA;
783 784 785 786 787 788 789 790 791 792
                    }
                } else {
                    val = (1 << run);
                    if (run) {
                        UPDATE_CACHE(re, &s->gb);
                        val += NEG_USR32(GET_CACHE(re, &s->gb), run);
                        LAST_SKIP_BITS(re, &s->gb, run);
                    }
                    *EOBRUN = val - 1;
                    break;
793
                }
794 795
            }
        }
796
        CLOSE_READER(re, &s->gb);
797
    }
798 799

    if (i > *last_nnz)
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        *last_nnz = i;
801

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    return 0;
}

805 806 807 808 809 810
#define REFINE_BIT(j) {                                             \
    UPDATE_CACHE(re, &s->gb);                                       \
    sign = block[j] >> 15;                                          \
    block[j] += SHOW_UBITS(re, &s->gb, 1) *                         \
                ((quant_matrix[j] ^ sign) - sign) << Al;            \
    LAST_SKIP_BITS(re, &s->gb, 1);                                  \
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}

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#define ZERO_RUN                                                    \
for (; ; i++) {                                                     \
    if (i > last) {                                                 \
        i += run;                                                   \
        if (i > se) {                                               \
            av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
            return -1;                                              \
        }                                                           \
        break;                                                      \
    }                                                               \
    j = s->scantable.permutated[i];                                 \
    if (block[j])                                                   \
        REFINE_BIT(j)                                               \
    else if (run-- == 0)                                            \
        break;                                                      \
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}

/* decode block and dequantize - progressive JPEG refinement pass */
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static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
832 833 834
                                   uint8_t *last_nnz,
                                   int ac_index, int16_t *quant_matrix,
                                   int ss, int se, int Al, int *EOBRUN)
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{
836 837
    int code, i = ss, j, sign, val, run;
    int last    = FFMIN(se, *last_nnz);
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    OPEN_READER(re, &s->gb);
840
    if (*EOBRUN) {
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        (*EOBRUN)--;
842 843
    } else {
        for (; ; i++) {
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            UPDATE_CACHE(re, &s->gb);
845
            GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
846

847
            if (code & 0xF) {
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                run = ((unsigned) code) >> 4;
                UPDATE_CACHE(re, &s->gb);
                val = SHOW_UBITS(re, &s->gb, 1);
                LAST_SKIP_BITS(re, &s->gb, 1);
                ZERO_RUN;
                j = s->scantable.permutated[i];
                val--;
855
                block[j] = ((quant_matrix[j] << Al) ^ val) - val;
856 857
                if (i == se) {
                    if (i > *last_nnz)
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                        *last_nnz = i;
859
                    CLOSE_READER(re, &s->gb);
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                    return 0;
                }
862
            } else {
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                run = ((unsigned) code) >> 4;
864
                if (run == 0xF) {
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                    ZERO_RUN;
866
                } else {
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                    val = run;
                    run = (1 << run);
869
                    if (val) {
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                        UPDATE_CACHE(re, &s->gb);
                        run += SHOW_UBITS(re, &s->gb, val);
                        LAST_SKIP_BITS(re, &s->gb, val);
                    }
                    *EOBRUN = run - 1;
                    break;
                }
            }
        }

880
        if (i > *last_nnz)
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            *last_nnz = i;
    }

884
    for (; i <= last; i++) {
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        j = s->scantable.permutated[i];
886
        if (block[j])
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            REFINE_BIT(j)
    }
    CLOSE_READER(re, &s->gb);
890 891 892

    return 0;
}
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#undef REFINE_BIT
#undef ZERO_RUN
895

896
static int handle_rstn(MJpegDecodeContext *s, int nb_components)
897 898
{
    int i;
899 900
    int reset = 0;

901 902 903 904 905
    if (s->restart_interval) {
        s->restart_count--;
        if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
            align_get_bits(&s->gb);
            for (i = 0; i < nb_components; i++) /* reset dc */
906
                s->last_dc[i] = (4 << s->bits);
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        }

        i = 8 + ((-get_bits_count(&s->gb)) & 7);
        /* skip RSTn */
911
        if (s->restart_count == 0) {
912 913 914 915 916 917 918 919
            if(   show_bits(&s->gb, i) == (1 << i) - 1
               || show_bits(&s->gb, i) == 0xFF) {
                int pos = get_bits_count(&s->gb);
                align_get_bits(&s->gb);
                while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
                    skip_bits(&s->gb, 8);
                if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
                    for (i = 0; i < nb_components; i++) /* reset dc */
920
                        s->last_dc[i] = (4 << s->bits);
921
                    reset = 1;
922 923 924
                } else
                    skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
            }
925 926
        }
    }
927
    return reset;
928 929
}

930 931
static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
{
932
    int i, mb_x, mb_y;
933
    uint16_t (*buffer)[4];
934
    int left[4], top[4], topleft[4];
935
    const int linesize = s->linesize[0];
936
    const int mask     = ((1 << s->bits) - 1) << point_transform;
937 938
    int resync_mb_y = 0;
    int resync_mb_x = 0;
939

940 941 942 943 944 945
    if (s->nb_components != 3 && s->nb_components != 4)
        return AVERROR_INVALIDDATA;
    if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
        return AVERROR_INVALIDDATA;


946 947
    s->restart_count = s->restart_interval;

948 949 950
    av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
                   (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
    buffer = s->ljpeg_buffer;
951

952
    for (i = 0; i < 4; i++)
953 954 955
        buffer[0][i] = 1 << (s->bits - 1);

    for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
956
        uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
957 958 959 960

        if (s->interlaced && s->bottom_field)
            ptr += linesize >> 1;

961
        for (i = 0; i < 4; i++)
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            top[i] = left[i] = topleft[i] = buffer[0][i];

        for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
965 966 967
            int modified_predictor = predictor;

            if (s->restart_interval && !s->restart_count){
968
                s->restart_count = s->restart_interval;
969 970
                resync_mb_x = mb_x;
                resync_mb_y = mb_y;
971
                for(i=0; i<4; i++)
972
                    top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
973
            }
974
            if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
975
                modified_predictor = 1;
976

977
            for (i=0;i<nb_components;i++) {
978
                int pred, dc;
979

980 981
                topleft[i] = top[i];
                top[i]     = buffer[mb_x][i];
982 983 984

                PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);

985
                dc = mjpeg_decode_dc(s, s->dc_index[i]);
986
                if(dc == 0xFFFFF)
987 988
                    return -1;

989 990
                left[i] = buffer[mb_x][i] =
                    mask & (pred + (dc << point_transform));
991 992 993 994 995 996 997
            }

            if (s->restart_interval && !--s->restart_count) {
                align_get_bits(&s->gb);
                skip_bits(&s->gb, 16); /* skip RSTn */
            }
        }
998 999 1000
        if (s->nb_components == 4) {
            for(i=0; i<nb_components; i++) {
                int c= s->comp_index[i];
1001 1002 1003 1004
                if (s->bits <= 8) {
                    for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
                        ptr[4*mb_x+3-c] = buffer[mb_x][i];
                    }
1005 1006
                } else if(s->bits == 9) {
                    return AVERROR_PATCHWELCOME;
1007 1008 1009 1010
                } else {
                    for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
                        ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
                    }
1011 1012 1013
                }
            }
        } else if (s->rct) {
1014 1015 1016 1017
            for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
                ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
                ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
                ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1018
            }
1019 1020 1021 1022 1023
        } else if (s->pegasus_rct) {
            for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
                ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
                ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
                ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1024
            }
1025 1026
        } else {
            for(i=0; i<nb_components; i++) {
1027
                int c= s->comp_index[i];
1028 1029 1030 1031
                if (s->bits <= 8) {
                    for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
                        ptr[3*mb_x+2-c] = buffer[mb_x][i];
                    }
1032 1033
                } else if(s->bits == 9) {
                    return AVERROR_PATCHWELCOME;
1034 1035 1036 1037
                } else {
                    for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
                        ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
                    }
1038
                }
1039 1040 1041 1042 1043 1044
            }
        }
    }
    return 0;
}

1045
static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1046
                                 int point_transform, int nb_components)
1047
{
1048
    int i, mb_x, mb_y, mask;
1049
    int bits= (s->bits+7)&~7;
1050 1051
    int resync_mb_y = 0;
    int resync_mb_x = 0;
1052 1053

    point_transform += bits - s->bits;
1054
    mask = ((1 << s->bits) - 1) << point_transform;
1055

1056
    av_assert0(nb_components>=1 && nb_components<=4);
1057

1058 1059
    for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
        for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1060
            if (s->restart_interval && !s->restart_count){
1061
                s->restart_count = s->restart_interval;
1062 1063 1064
                resync_mb_x = mb_x;
                resync_mb_y = mb_y;
            }
1065

1066 1067 1068
            if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
                int toprow  = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
                int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1069
                for (i = 0; i < nb_components; i++) {
1070
                    uint8_t *ptr;
1071
                    uint16_t *ptr16;
1072 1073 1074 1075 1076 1077 1078 1079 1080
                    int n, h, v, x, y, c, j, linesize;
                    n = s->nb_blocks[i];
                    c = s->comp_index[i];
                    h = s->h_scount[i];
                    v = s->v_scount[i];
                    x = 0;
                    y = 0;
                    linesize= s->linesize[c];

1081 1082
                    if(bits>8) linesize /= 2;

1083
                    for(j=0; j<n; j++) {
1084
                        int pred, dc;
1085

1086
                        dc = mjpeg_decode_dc(s, s->dc_index[i]);
1087
                        if(dc == 0xFFFFF)
1088 1089
                            return -1;
                        if(bits<=8){
1090
                        ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1091 1092
                        if(y==0 && toprow){
                            if(x==0 && leftcol){
1093
                                pred= 1 << (bits - 1);
1094 1095 1096 1097
                            }else{
                                pred= ptr[-1];
                            }
                        }else{
1098
                            if(x==0 && leftcol){
1099 1100 1101 1102 1103 1104 1105 1106
                                pred= ptr[-linesize];
                            }else{
                                PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
                            }
                        }

                        if (s->interlaced && s->bottom_field)
                            ptr += linesize >> 1;
1107
                        pred &= mask;
1108
                        *ptr= pred + (dc << point_transform);
1109
                        }else{
1110
                            ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1111 1112
                            if(y==0 && toprow){
                                if(x==0 && leftcol){
1113 1114 1115 1116 1117
                                    pred= 1 << (bits - 1);
                                }else{
                                    pred= ptr16[-1];
                                }
                            }else{
1118
                                if(x==0 && leftcol){
1119 1120 1121 1122 1123
                                    pred= ptr16[-linesize];
                                }else{
                                    PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
                                }
                            }
1124

1125 1126
                            if (s->interlaced && s->bottom_field)
                                ptr16 += linesize >> 1;
1127
                            pred &= mask;
1128 1129
                            *ptr16= pred + (dc << point_transform);
                        }
1130 1131 1132 1133 1134 1135
                        if (++x == h) {
                            x = 0;
                            y++;
                        }
                    }
                }
1136 1137
            } else {
                for (i = 0; i < nb_components; i++) {
1138
                    uint8_t *ptr;
1139
                    uint16_t *ptr16;
1140
                    int n, h, v, x, y, c, j, linesize, dc;
1141 1142 1143 1144 1145 1146 1147
                    n        = s->nb_blocks[i];
                    c        = s->comp_index[i];
                    h        = s->h_scount[i];
                    v        = s->v_scount[i];
                    x        = 0;
                    y        = 0;
                    linesize = s->linesize[c];
1148

1149 1150
                    if(bits>8) linesize /= 2;

1151
                    for (j = 0; j < n; j++) {
1152 1153
                        int pred;

1154
                        dc = mjpeg_decode_dc(s, s->dc_index[i]);
1155
                        if(dc == 0xFFFFF)
1156
                            return -1;
1157
                        if(bits<=8){
1158
                            ptr = s->picture_ptr->data[c] +
1159 1160 1161
                              (linesize * (v * mb_y + y)) +
                              (h * mb_x + x); //FIXME optimize this crap
                            PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1162

1163
                            pred &= mask;
1164
                            *ptr = pred + (dc << point_transform);
1165
                        }else{
1166
                            ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1167 1168
                            PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);

1169
                            pred &= mask;
1170 1171
                            *ptr16= pred + (dc << point_transform);
                        }
1172

1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188
                        if (++x == h) {
                            x = 0;
                            y++;
                        }
                    }
                }
            }
            if (s->restart_interval && !--s->restart_count) {
                align_get_bits(&s->gb);
                skip_bits(&s->gb, 16); /* skip RSTn */
            }
        }
    }
    return 0;
}

1189 1190
static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
                                              uint8_t *dst, const uint8_t *src,
1191 1192 1193
                                              int linesize, int lowres)
{
    switch (lowres) {
1194
    case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1195 1196 1197 1198 1199 1200 1201 1202 1203 1204
        break;
    case 1: copy_block4(dst, src, linesize, linesize, 4);
        break;
    case 2: copy_block2(dst, src, linesize, linesize, 2);
        break;
    case 3: *dst = *src;
        break;
    }
}

1205 1206 1207
static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
{
    int block_x, block_y;
1208
    int size = 8 >> s->avctx->lowres;
1209
    if (s->bits > 8) {
1210 1211
        for (block_y=0; block_y<size; block_y++)
            for (block_x=0; block_x<size; block_x++)
1212 1213
                *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
    } else {
1214 1215
        for (block_y=0; block_y<size; block_y++)
            for (block_x=0; block_x<size; block_x++)
1216 1217 1218 1219
                *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
    }
}

1220 1221
static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
                             int Al, const uint8_t *mb_bitmask,
1222
                             int mb_bitmask_size,
1223 1224
                             const AVFrame *reference)
{
1225
    int i, mb_x, mb_y;
1226
    uint8_t *data[MAX_COMPONENTS];
1227
    const uint8_t *reference_data[MAX_COMPONENTS];
1228
    int linesize[MAX_COMPONENTS];
1229
    GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1230
    int bytes_per_pixel = 1 + (s->bits > 8);
1231

1232 1233 1234 1235 1236
    if (mb_bitmask) {
        if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
            av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
            return AVERROR_INVALIDDATA;
        }
1237
        init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1238
    }
1239

1240
    s->restart_count = 0;
1241

1242 1243
    for (i = 0; i < nb_components; i++) {
        int c   = s->comp_index[i];
1244
        data[c] = s->picture_ptr->data[c];
1245
        reference_data[c] = reference ? reference->data[c] : NULL;
1246
        linesize[c] = s->linesize[c];
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1247
        s->coefs_finished[c] |= 1;
1248 1249
    }

1250 1251
    for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
        for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1252 1253
            const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);

1254 1255 1256
            if (s->restart_interval && !s->restart_count)
                s->restart_count = s->restart_interval;

1257
            if (get_bits_left(&s->gb) < 0) {
1258
                av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1259
                       -get_bits_left(&s->gb));
1260
                return AVERROR_INVALIDDATA;
1261
            }
1262
            for (i = 0; i < nb_components; i++) {
1263 1264
                uint8_t *ptr;
                int n, h, v, x, y, c, j;
1265
                int block_offset;
1266 1267 1268 1269 1270 1271
                n = s->nb_blocks[i];
                c = s->comp_index[i];
                h = s->h_scount[i];
                v = s->v_scount[i];
                x = 0;
                y = 0;
1272
                for (j = 0; j < n; j++) {
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1273
                    block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1274
                                     (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1275

1276
                    if (s->interlaced && s->bottom_field)
1277
                        block_offset += linesize[c] >> 1;
1278 1279 1280 1281 1282
                    if (   8*(h * mb_x + x) < s->width
                        && 8*(v * mb_y + y) < s->height) {
                        ptr = data[c] + block_offset;
                    } else
                        ptr = NULL;
1283
                    if (!s->progressive) {
1284 1285 1286 1287
                        if (copy_mb) {
                            if (ptr)
                                mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
                                                linesize[c], s->avctx->lowres);
1288

1289
                        } else {
1290
                            s->bdsp.clear_block(s->block);
1291 1292
                            if (decode_block(s, s->block, i,
                                             s->dc_index[i], s->ac_index[i],
1293
                                             s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1294 1295
                                av_log(s->avctx, AV_LOG_ERROR,
                                       "error y=%d x=%d\n", mb_y, mb_x);
1296
                                return AVERROR_INVALIDDATA;
1297
                            }
1298 1299 1300 1301 1302
                            if (ptr) {
                                s->idsp.idct_put(ptr, linesize[c], s->block);
                                if (s->bits & 7)
                                    shift_output(s, ptr, linesize[c]);
                            }
1303
                        }
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1304
                    } else {
1305 1306
                        int block_idx  = s->block_stride[c] * (v * mb_y + y) +
                                         (h * mb_x + x);
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1307
                        int16_t *block = s->blocks[c][block_idx];
1308 1309
                        if (Ah)
                            block[0] += get_bits1(&s->gb) *
1310
                                        s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1311
                        else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1312
                                                       s->quant_matrixes[s->quant_sindex[i]],
1313 1314 1315
                                                       Al) < 0) {
                            av_log(s->avctx, AV_LOG_ERROR,
                                   "error y=%d x=%d\n", mb_y, mb_x);
1316
                            return AVERROR_INVALIDDATA;
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1317 1318
                        }
                    }
1319 1320
                    ff_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
                    ff_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1321 1322
                            mb_x, mb_y, x, y, c, s->bottom_field,
                            (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1323 1324 1325 1326 1327 1328
                    if (++x == h) {
                        x = 0;
                        y++;
                    }
                }
            }
1329

1330
            handle_rstn(s, nb_components);
1331 1332 1333 1334 1335
        }
    }
    return 0;
}

1336 1337 1338
static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
                                            int se, int Ah, int Al)
{
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1339 1340 1341
    int mb_x, mb_y;
    int EOBRUN = 0;
    int c = s->comp_index[0];
1342
    uint8_t *data = s->picture_ptr->data[c];
1343
    int linesize  = s->linesize[c];
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1344
    int last_scan = 0;
1345
    int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1346
    int bytes_per_pixel = 1 + (s->bits > 8);
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1347

1348 1349 1350
    av_assert0(ss>=0 && Ah>=0 && Al>=0);
    if (se < ss || se > 63) {
        av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1351 1352 1353
        return AVERROR_INVALIDDATA;
    }

1354
    if (!Al) {
1355 1356
        // s->coefs_finished is a bitmask for coefficients coded
        // ss and se are parameters telling start and end coefficients
1357
        s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
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1358 1359 1360
        last_scan = !~s->coefs_finished[c];
    }

1361
    if (s->interlaced && s->bottom_field)
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1362 1363
        data += linesize >> 1;

1364 1365
    s->restart_count = 0;

1366 1367 1368
    for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
        uint8_t *ptr     = data + (mb_y * linesize * 8 >> s->avctx->lowres);
        int block_idx    = mb_y * s->block_stride[c];
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        int16_t (*block)[64] = &s->blocks[c][block_idx];
1370 1371 1372
        uint8_t *last_nnz    = &s->last_nnz[c][block_idx];
        for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
                int ret;
1373 1374 1375
                if (s->restart_interval && !s->restart_count)
                    s->restart_count = s->restart_interval;

1376 1377 1378 1379 1380 1381 1382 1383 1384
                if (Ah)
                    ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
                                                  quant_matrix, ss, se, Al, &EOBRUN);
                else
                    ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
                                                   quant_matrix, ss, se, Al, &EOBRUN);
                if (ret < 0) {
                    av_log(s->avctx, AV_LOG_ERROR,
                           "error y=%d x=%d\n", mb_y, mb_x);
1385
                    return AVERROR_INVALIDDATA;
1386 1387 1388
                }

            if (last_scan) {
1389
                    s->idsp.idct_put(ptr, linesize, *block);
1390 1391 1392
                    if (s->bits & 7)
                        shift_output(s, ptr, linesize);
                    ptr += bytes_per_pixel*8 >> s->avctx->lowres;
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1393
            }
1394 1395
            if (handle_rstn(s, 0))
                EOBRUN = 0;
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1396 1397 1398 1399 1400
        }
    }
    return 0;
}

1401
int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1402
                        int mb_bitmask_size, const AVFrame *reference)
1403 1404
{
    int len, nb_components, i, h, v, predictor, point_transform;
1405
    int index, id, ret;
1406
    const int block_size = s->lossless ? 1 : 8;
1407 1408
    int ilv, prev_shift;

1409 1410 1411 1412 1413 1414 1415
    if (!s->got_picture) {
        av_log(s->avctx, AV_LOG_WARNING,
                "Can not process SOS before SOF, skipping\n");
        return -1;
    }

    av_assert0(s->picture_ptr->data[0]);
1416 1417 1418
    /* XXX: verify len field validity */
    len = get_bits(&s->gb, 16);
    nb_components = get_bits(&s->gb, 8);
1419 1420 1421
    if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
        av_log(s->avctx, AV_LOG_ERROR,
               "decode_sos: nb_components (%d) unsupported\n", nb_components);
1422
        return AVERROR_PATCHWELCOME;
1423
    }
1424
    if (len != 6 + 2 * nb_components) {
1425
        av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1426
        return AVERROR_INVALIDDATA;
1427
    }
1428
    for (i = 0; i < nb_components; i++) {
1429 1430 1431
        id = get_bits(&s->gb, 8) - 1;
        av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
        /* find component index */
1432
        for (index = 0; index < s->nb_components; index++)
1433 1434
            if (id == s->component_id[index])
                break;
1435 1436 1437
        if (index == s->nb_components) {
            av_log(s->avctx, AV_LOG_ERROR,
                   "decode_sos: index(%d) out of components\n", index);
1438
            return AVERROR_INVALIDDATA;
1439
        }
1440 1441 1442 1443
        /* Metasoft MJPEG codec has Cb and Cr swapped */
        if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
            && nb_components == 3 && s->nb_components == 3 && i)
            index = 3 - i;
1444

1445
        s->quant_sindex[i] = s->quant_index[index];
1446 1447 1448 1449
        s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
        s->h_scount[i]  = s->h_count[index];
        s->v_scount[i]  = s->v_count[index];

1450
        if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
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1451
            index = (i+2)%3;
1452
        if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1453
            index = (index+2)%3;
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1454

1455 1456 1457 1458 1459 1460 1461 1462
        s->comp_index[i] = index;

        s->dc_index[i] = get_bits(&s->gb, 4);
        s->ac_index[i] = get_bits(&s->gb, 4);

        if (s->dc_index[i] <  0 || s->ac_index[i] < 0 ||
            s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
            goto out_of_range;
1463
        if (!s->vlcs[0][s->dc_index[i]].table || !(s->progressive ? s->vlcs[2][s->ac_index[0]].table : s->vlcs[1][s->ac_index[i]].table))
1464
            goto out_of_range;
1465 1466
    }

1467 1468
    predictor = get_bits(&s->gb, 8);       /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
    ilv = get_bits(&s->gb, 8);             /* JPEG Se / JPEG-LS ILV */
1469
    if(s->avctx->codec_tag != AV_RL32("CJPG")){
1470 1471
        prev_shift      = get_bits(&s->gb, 4); /* Ah */
        point_transform = get_bits(&s->gb, 4); /* Al */
1472
    }else
1473
        prev_shift = point_transform = 0;
1474 1475 1476 1477 1478

    if (nb_components > 1) {
        /* interleaved stream */
        s->mb_width  = (s->width  + s->h_max * block_size - 1) / (s->h_max * block_size);
        s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1479
    } else if (!s->ls) { /* skip this for JPEG-LS */
1480 1481
        h = s->h_max / s->h_scount[0];
        v = s->v_max / s->v_scount[0];
1482 1483
        s->mb_width     = (s->width  + h * block_size - 1) / (h * block_size);
        s->mb_height    = (s->height + v * block_size - 1) / (v * block_size);
1484
        s->nb_blocks[0] = 1;
1485 1486
        s->h_scount[0]  = 1;
        s->v_scount[0]  = 1;
1487 1488
    }

1489 1490 1491
    if (s->avctx->debug & FF_DEBUG_PICT_INFO)
        av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
               s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1492
               predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1493
               s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1494 1495 1496 1497 1498 1499


    /* mjpeg-b can have padding bytes between sos and image data, skip them */
    for (i = s->mjpb_skiptosod; i > 0; i--)
        skip_bits(&s->gb, 8);

1500 1501
next_field:
    for (i = 0; i < nb_components; i++)
1502
        s->last_dc[i] = (4 << s->bits);
1503

1504
    if (s->lossless) {
1505
        av_assert0(s->picture_ptr == s->picture);
1506 1507
        if (CONFIG_JPEGLS_DECODER && s->ls) {
//            for () {
1508 1509
//            reset_ls_coding_parameters(s, 0);

1510 1511 1512
            if ((ret = ff_jpegls_decode_picture(s, predictor,
                                                point_transform, ilv)) < 0)
                return ret;
1513 1514
        } else {
            if (s->rgb) {
1515
                if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1516
                    return ret;
1517
            } else {
1518
                if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1519 1520
                                                 point_transform,
                                                 nb_components)) < 0)
1521
                    return ret;
1522 1523
            }
        }
1524 1525
    } else {
        if (s->progressive && predictor) {
1526
            av_assert0(s->picture_ptr == s->picture);
1527 1528
            if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
                                                        ilv, prev_shift,
1529
                                                        point_transform)) < 0)
1530
                return ret;
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Loren Merritt committed
1531
        } else {
1532 1533
            if ((ret = mjpeg_decode_scan(s, nb_components,
                                         prev_shift, point_transform,
1534
                                         mb_bitmask, mb_bitmask_size, reference)) < 0)
1535
                return ret;
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Loren Merritt committed
1536
        }
1537
    }
1538 1539 1540 1541 1542

    if (s->interlaced &&
        get_bits_left(&s->gb) > 32 &&
        show_bits(&s->gb, 8) == 0xFF) {
        GetBitContext bak = s->gb;
1543
        align_get_bits(&bak);
1544
        if (show_bits(&bak, 16) == 0xFFD1) {
1545
            av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1546 1547 1548 1549 1550 1551 1552 1553
            s->gb = bak;
            skip_bits(&s->gb, 16);
            s->bottom_field ^= 1;

            goto next_field;
        }
    }

1554 1555 1556 1557
    emms_c();
    return 0;
 out_of_range:
    av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1558
    return AVERROR_INVALIDDATA;
1559 1560 1561 1562 1563
}

static int mjpeg_decode_dri(MJpegDecodeContext *s)
{
    if (get_bits(&s->gb, 16) != 4)
1564
        return AVERROR_INVALIDDATA;
1565
    s->restart_interval = get_bits(&s->gb, 16);
1566 1567 1568
    s->restart_count    = 0;
    av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
           s->restart_interval);
1569 1570 1571 1572 1573 1574 1575 1576 1577

    return 0;
}

static int mjpeg_decode_app(MJpegDecodeContext *s)
{
    int len, id, i;

    len = get_bits(&s->gb, 16);
1578
    if (len < 6)
1579
        return AVERROR_INVALIDDATA;
1580
    if (8 * len > get_bits_left(&s->gb))
1581
        return AVERROR_INVALIDDATA;
1582

1583
    id   = get_bits_long(&s->gb, 32);
1584 1585
    len -= 6;

1586 1587 1588 1589 1590
    if (s->avctx->debug & FF_DEBUG_STARTCODE) {
        char id_str[32];
        av_get_codec_tag_string(id_str, sizeof(id_str), av_bswap32(id));
        av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n", id_str, id, len);
    }
1591

1592 1593 1594
    /* Buggy AVID, it puts EOI only at every 10th frame. */
    /* Also, this fourcc is used by non-avid files too, it holds some
       information, but it's always present in AVID-created files. */
1595
    if (id == AV_RB32("AVI1")) {
1596 1597 1598 1599 1600 1601 1602 1603
        /* structure:
            4bytes      AVI1
            1bytes      polarity
            1bytes      always zero
            4bytes      field_size
            4bytes      field_size_less_padding
        */
            s->buggy_avid = 1;
1604
        i = get_bits(&s->gb, 8); len--;
1605
        av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616
#if 0
        skip_bits(&s->gb, 8);
        skip_bits(&s->gb, 32);
        skip_bits(&s->gb, 32);
        len -= 10;
#endif
        goto out;
    }

//    len -= 2;

1617
    if (id == AV_RB32("JFIF")) {
1618 1619
        int t_w, t_h, v1, v2;
        skip_bits(&s->gb, 8); /* the trailing zero-byte */
1620 1621
        v1 = get_bits(&s->gb, 8);
        v2 = get_bits(&s->gb, 8);
1622 1623
        skip_bits(&s->gb, 8);

1624 1625
        s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
        s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1626
        ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
1627 1628

        if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1629 1630 1631 1632 1633
            av_log(s->avctx, AV_LOG_INFO,
                   "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
                   v1, v2,
                   s->avctx->sample_aspect_ratio.num,
                   s->avctx->sample_aspect_ratio.den);
1634 1635 1636

        t_w = get_bits(&s->gb, 8);
        t_h = get_bits(&s->gb, 8);
1637
        if (t_w && t_h) {
1638
            /* skip thumbnail */
1639 1640
            if (len -10 - (t_w * t_h * 3) > 0)
                len -= t_w * t_h * 3;
1641 1642 1643 1644 1645
        }
        len -= 10;
        goto out;
    }

1646
    if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1647 1648 1649
        skip_bits(&s->gb, 16); /* version */
        skip_bits(&s->gb, 16); /* flags0 */
        skip_bits(&s->gb, 16); /* flags1 */
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        s->adobe_transform = get_bits(&s->gb,  8);
        if (s->avctx->debug & FF_DEBUG_PICT_INFO)
            av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1653 1654 1655 1656
        len -= 7;
        goto out;
    }

1657
    if (id == AV_RB32("LJIF")) {
1658 1659
        int rgb = s->rgb;
        int pegasus_rct = s->pegasus_rct;
1660
        if (s->avctx->debug & FF_DEBUG_PICT_INFO)
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            av_log(s->avctx, AV_LOG_INFO,
                   "Pegasus lossless jpeg header found\n");
1663
        skip_bits(&s->gb, 16); /* version ? */
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        skip_bits(&s->gb, 16); /* unknown always 0? */
        skip_bits(&s->gb, 16); /* unknown always 0? */
        skip_bits(&s->gb, 16); /* unknown always 0? */
1667
        switch (i=get_bits(&s->gb, 8)) {
1668
        case 1:
1669 1670
            rgb         = 1;
            pegasus_rct = 0;
1671 1672
            break;
        case 2:
1673 1674
            rgb         = 1;
            pegasus_rct = 1;
1675 1676
            break;
        default:
1677
            av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1678
        }
1679

1680
        len -= 9;
1681 1682 1683 1684 1685 1686 1687 1688 1689
        if (s->got_picture)
            if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
                av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
                goto out;
            }

        s->rgb = rgb;
        s->pegasus_rct = pegasus_rct;

1690 1691
        goto out;
    }
1692 1693 1694 1695 1696 1697 1698
    if (id == AV_RL32("colr") && len > 0) {
        s->colr = get_bits(&s->gb, 8);
        if (s->avctx->debug & FF_DEBUG_PICT_INFO)
            av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
        len --;
        goto out;
    }
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    if (id == AV_RL32("xfrm") && len > 0) {
        s->xfrm = get_bits(&s->gb, 8);
        if (s->avctx->debug & FF_DEBUG_PICT_INFO)
            av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
        len --;
        goto out;
    }
1706

1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745
    /* JPS extension by VRex */
    if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
        int flags, layout, type;
        if (s->avctx->debug & FF_DEBUG_PICT_INFO)
            av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");

        skip_bits(&s->gb, 32); len -= 4;  /* JPS_ */
        skip_bits(&s->gb, 16); len -= 2;  /* block length */
        skip_bits(&s->gb, 8);             /* reserved */
        flags  = get_bits(&s->gb, 8);
        layout = get_bits(&s->gb, 8);
        type   = get_bits(&s->gb, 8);
        len -= 4;

        s->stereo3d = av_stereo3d_alloc();
        if (!s->stereo3d) {
            goto out;
        }
        if (type == 0) {
            s->stereo3d->type = AV_STEREO3D_2D;
        } else if (type == 1) {
            switch (layout) {
            case 0x01:
                s->stereo3d->type = AV_STEREO3D_LINES;
                break;
            case 0x02:
                s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
                break;
            case 0x03:
                s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
                break;
            }
            if (!(flags & 0x04)) {
                s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
            }
        }
        goto out;
    }

1746
    /* EXIF metadata */
1747
    if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762
        GetByteContext gbytes;
        int ret, le, ifd_offset, bytes_read;
        const uint8_t *aligned;

        skip_bits(&s->gb, 16); // skip padding
        len -= 2;

        // init byte wise reading
        aligned = align_get_bits(&s->gb);
        bytestream2_init(&gbytes, aligned, len);

        // read TIFF header
        ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
        if (ret) {
            av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1763
        } else {
1764
            bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1765

1766 1767 1768 1769 1770 1771
            // read 0th IFD and store the metadata
            // (return values > 0 indicate the presence of subimage metadata)
            ret = avpriv_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
            if (ret < 0) {
                av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
            }
1772 1773 1774 1775 1776 1777 1778 1779 1780
        }

        bytes_read = bytestream2_tell(&gbytes);
        skip_bits(&s->gb, bytes_read << 3);
        len -= bytes_read;

        goto out;
    }

1781
    /* Apple MJPEG-A */
1782 1783
    if ((s->start_code == APP1) && (len > (0x28 - 8))) {
        id   = get_bits_long(&s->gb, 32);
1784
        len -= 4;
1785
        /* Apple MJPEG-A */
1786
        if (id == AV_RB32("mjpg")) {
1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804
#if 0
            skip_bits(&s->gb, 32); /* field size */
            skip_bits(&s->gb, 32); /* pad field size */
            skip_bits(&s->gb, 32); /* next off */
            skip_bits(&s->gb, 32); /* quant off */
            skip_bits(&s->gb, 32); /* huff off */
            skip_bits(&s->gb, 32); /* image off */
            skip_bits(&s->gb, 32); /* scan off */
            skip_bits(&s->gb, 32); /* data off */
#endif
            if (s->avctx->debug & FF_DEBUG_PICT_INFO)
                av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
        }
    }

out:
    /* slow but needed for extreme adobe jpegs */
    if (len < 0)
1805 1806 1807
        av_log(s->avctx, AV_LOG_ERROR,
               "mjpeg: error, decode_app parser read over the end\n");
    while (--len > 0)
1808 1809 1810 1811 1812 1813 1814 1815
        skip_bits(&s->gb, 8);

    return 0;
}

static int mjpeg_decode_com(MJpegDecodeContext *s)
{
    int len = get_bits(&s->gb, 16);
1816
    if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1817 1818 1819 1820 1821
        char *cbuf = av_malloc(len - 1);
        if (cbuf) {
            int i;
            for (i = 0; i < len - 2; i++)
                cbuf[i] = get_bits(&s->gb, 8);
1822 1823
            if (i > 0 && cbuf[i - 1] == '\n')
                cbuf[i - 1] = 0;
1824 1825 1826
            else
                cbuf[i] = 0;

1827
            if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1828
                av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1829 1830

            /* buggy avid, it puts EOI only at every 10th frame */
1831
            if (!strncmp(cbuf, "AVID", 4)) {
1832
                parse_avid(s, cbuf, len);
1833 1834
            } else if (!strcmp(cbuf, "CS=ITU601"))
                s->cs_itu601 = 1;
1835
            else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
1836
                     (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1837
                s->flipped = 1;
1838 1839
            else if (!strcmp(cbuf, "MULTISCOPE II"))
                s->multiscope = 2;
1840 1841 1842 1843 1844 1845 1846 1847 1848 1849

            av_free(cbuf);
        }
    }

    return 0;
}

/* return the 8 bit start code value and update the search
   state. Return -1 if no start code found */
Michael Niedermayer's avatar
Michael Niedermayer committed
1850
static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1851
{
Michael Niedermayer's avatar
Michael Niedermayer committed
1852
    const uint8_t *buf_ptr;
1853 1854
    unsigned int v, v2;
    int val;
1855
    int skipped = 0;
1856 1857

    buf_ptr = *pbuf_ptr;
1858
    while (buf_end - buf_ptr > 1) {
1859
        v  = *buf_ptr++;
1860 1861 1862 1863 1864 1865 1866
        v2 = *buf_ptr;
        if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
            val = *buf_ptr++;
            goto found;
        }
        skipped++;
    }
1867
    buf_ptr = buf_end;
1868 1869
    val = -1;
found:
1870
    ff_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1871 1872 1873 1874
    *pbuf_ptr = buf_ptr;
    return val;
}

1875 1876
int ff_mjpeg_find_marker(MJpegDecodeContext *s,
                         const uint8_t **buf_ptr, const uint8_t *buf_end,
1877 1878
                         const uint8_t **unescaped_buf_ptr,
                         int *unescaped_buf_size)
1879 1880
{
    int start_code;
1881
    start_code = find_marker(buf_ptr, buf_end);
1882

1883 1884 1885
    av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
    if (!s->buffer)
        return AVERROR(ENOMEM);
1886

1887 1888 1889 1890
    /* unescape buffer of SOS, use special treatment for JPEG-LS */
    if (start_code == SOS && !s->ls) {
        const uint8_t *src = *buf_ptr;
        uint8_t *dst = s->buffer;
1891

1892 1893
        while (src < buf_end) {
            uint8_t x = *(src++);
1894

1895
            *(dst++) = x;
1896
            if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1897 1898 1899
                if (x == 0xff) {
                    while (src < buf_end && x == 0xff)
                        x = *(src++);
1900

1901 1902 1903 1904
                    if (x >= 0xd0 && x <= 0xd7)
                        *(dst++) = x;
                    else if (x)
                        break;
1905
                }
1906 1907 1908 1909
            }
        }
        *unescaped_buf_ptr  = s->buffer;
        *unescaped_buf_size = dst - s->buffer;
1910
        memset(s->buffer + *unescaped_buf_size, 0,
1911
               AV_INPUT_BUFFER_PADDING_SIZE);
1912

1913
        av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928
               (buf_end - *buf_ptr) - (dst - s->buffer));
    } else if (start_code == SOS && s->ls) {
        const uint8_t *src = *buf_ptr;
        uint8_t *dst  = s->buffer;
        int bit_count = 0;
        int t = 0, b = 0;
        PutBitContext pb;

        /* find marker */
        while (src + t < buf_end) {
            uint8_t x = src[t++];
            if (x == 0xff) {
                while ((src + t < buf_end) && x == 0xff)
                    x = src[t++];
                if (x & 0x80) {
1929
                    t -= FFMIN(2, t);
1930
                    break;
1931
                }
1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942
            }
        }
        bit_count = t * 8;
        init_put_bits(&pb, dst, t);

        /* unescape bitstream */
        while (b < t) {
            uint8_t x = src[b++];
            put_bits(&pb, 8, x);
            if (x == 0xFF) {
                x = src[b++];
1943 1944 1945 1946
                if (x & 0x80) {
                    av_log(s->avctx, AV_LOG_WARNING, "Invalid escape sequence\n");
                    x &= 0x7f;
                }
1947 1948 1949 1950 1951 1952 1953 1954
                put_bits(&pb, 7, x);
                bit_count--;
            }
        }
        flush_put_bits(&pb);

        *unescaped_buf_ptr  = dst;
        *unescaped_buf_size = (bit_count + 7) >> 3;
1955
        memset(s->buffer + *unescaped_buf_size, 0,
1956
               AV_INPUT_BUFFER_PADDING_SIZE);
1957 1958 1959 1960
    } else {
        *unescaped_buf_ptr  = *buf_ptr;
        *unescaped_buf_size = buf_end - *buf_ptr;
    }
1961 1962 1963 1964

    return start_code;
}

1965
int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1966
                          AVPacket *avpkt)
1967
{
1968
    AVFrame     *frame = data;
1969
    const uint8_t *buf = avpkt->data;
1970
    int buf_size       = avpkt->size;
1971 1972 1973
    MJpegDecodeContext *s = avctx->priv_data;
    const uint8_t *buf_end, *buf_ptr;
    const uint8_t *unescaped_buf_ptr;
1974
    int hshift, vshift;
1975 1976
    int unescaped_buf_size;
    int start_code;
1977
    int i, index;
1978
    int ret = 0;
1979
    int is16bit;
1980

1981
    av_dict_free(&s->exif_metadata);
1982
    av_freep(&s->stereo3d);
1983
    s->adobe_transform = -1;
1984

1985 1986 1987 1988 1989
    buf_ptr = buf;
    buf_end = buf + buf_size;
    while (buf_ptr < buf_end) {
        /* find start next marker */
        start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1990 1991 1992 1993
                                          &unescaped_buf_ptr,
                                          &unescaped_buf_size);
        /* EOF */
        if (start_code < 0) {
1994
            break;
1995 1996 1997
        } else if (unescaped_buf_size > INT_MAX / 8) {
            av_log(avctx, AV_LOG_ERROR,
                   "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1998
                   start_code, unescaped_buf_size, buf_size);
1999
            return AVERROR_INVALIDDATA;
2000
        }
2001
        av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
2002
               start_code, buf_end - buf_ptr);
2003

2004 2005 2006
        ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);

        if (ret < 0) {
2007 2008 2009
            av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
            goto fail;
        }
2010

2011 2012 2013
        s->start_code = start_code;
        if (s->avctx->debug & FF_DEBUG_STARTCODE)
            av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
2014

2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
        /* process markers */
        if (start_code >= 0xd0 && start_code <= 0xd7)
            av_log(avctx, AV_LOG_DEBUG,
                   "restart marker: %d\n", start_code & 0x0f);
            /* APP fields */
        else if (start_code >= APP0 && start_code <= APP15)
            mjpeg_decode_app(s);
            /* Comment */
        else if (start_code == COM)
            mjpeg_decode_com(s);

2026 2027
        ret = -1;

2028 2029 2030 2031 2032
        if (!CONFIG_JPEGLS_DECODER &&
            (start_code == SOF48 || start_code == LSE)) {
            av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
            return AVERROR(ENOSYS);
        }
2033

2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045
        switch (start_code) {
        case SOI:
            s->restart_interval = 0;
            s->restart_count    = 0;
            /* nothing to do on SOI */
            break;
        case DQT:
            ff_mjpeg_decode_dqt(s);
            break;
        case DHT:
            if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
                av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
2046
                goto fail;
2047 2048 2049 2050 2051 2052 2053 2054
            }
            break;
        case SOF0:
        case SOF1:
            s->lossless    = 0;
            s->ls          = 0;
            s->progressive = 0;
            if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2055
                goto fail;
2056 2057 2058 2059 2060 2061
            break;
        case SOF2:
            s->lossless    = 0;
            s->ls          = 0;
            s->progressive = 1;
            if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2062
                goto fail;
2063 2064
            break;
        case SOF3:
2065
            s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2066 2067 2068 2069
            s->lossless    = 1;
            s->ls          = 0;
            s->progressive = 0;
            if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2070
                goto fail;
2071 2072
            break;
        case SOF48:
2073
            s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2074 2075 2076 2077
            s->lossless    = 1;
            s->ls          = 1;
            s->progressive = 0;
            if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2078
                goto fail;
2079 2080 2081 2082
            break;
        case LSE:
            if (!CONFIG_JPEGLS_DECODER ||
                (ret = ff_jpegls_decode_lse(s)) < 0)
2083
                goto fail;
2084 2085
            break;
        case EOI:
2086
eoi_parser:
2087
            s->cur_scan = 0;
2088 2089 2090
            if (!s->got_picture) {
                av_log(avctx, AV_LOG_WARNING,
                       "Found EOI before any SOF, ignoring\n");
2091 2092
                break;
            }
2093 2094 2095 2096
            if (s->interlaced) {
                s->bottom_field ^= 1;
                /* if not bottom field, do not output image yet */
                if (s->bottom_field == !s->interlace_polarity)
2097
                    break;
2098
            }
2099
            if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2100 2101
                return ret;
            *got_frame = 1;
2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112
            s->got_picture = 0;

            if (!s->lossless) {
                int qp = FFMAX3(s->qscale[0],
                                s->qscale[1],
                                s->qscale[2]);
                int qpw = (s->width + 15) / 16;
                AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
                if (qp_table_buf) {
                    memset(qp_table_buf->data, qp, qpw);
                    av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2113
                }
2114

2115 2116
                if(avctx->debug & FF_DEBUG_QP)
                    av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2117
            }
2118

2119 2120
            goto the_end;
        case SOS:
2121
            s->cur_scan++;
2122
            if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2123
                (avctx->err_recognition & AV_EF_EXPLODE))
2124
                goto fail;
2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141
            break;
        case DRI:
            mjpeg_decode_dri(s);
            break;
        case SOF5:
        case SOF6:
        case SOF7:
        case SOF9:
        case SOF10:
        case SOF11:
        case SOF13:
        case SOF14:
        case SOF15:
        case JPG:
            av_log(avctx, AV_LOG_ERROR,
                   "mjpeg: unsupported coding type (%x)\n", start_code);
            break;
2142
        }
2143 2144 2145 2146 2147 2148

        /* eof process start code */
        buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
        av_log(avctx, AV_LOG_DEBUG,
               "marker parser used %d bytes (%d bits)\n",
               (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2149
    }
2150
    if (s->got_picture && s->cur_scan) {
2151 2152 2153
        av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
        goto eoi_parser;
    }
2154
    av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2155
    return AVERROR_INVALIDDATA;
2156
fail:
2157
    s->got_picture = 0;
2158
    return ret;
2159
the_end:
2160 2161 2162

    is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step_minus1;

2163
    if (AV_RB32(s->upscale_h)) {
2164
        int p;
2165 2166 2167
        av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
                   avctx->pix_fmt == AV_PIX_FMT_YUV444P  ||
                   avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2168
                   avctx->pix_fmt == AV_PIX_FMT_YUV440P  ||
2169
                   avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2170 2171
                   avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
                   avctx->pix_fmt == AV_PIX_FMT_YUV420P  ||
2172
                   avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2173 2174
                   avctx->pix_fmt == AV_PIX_FMT_YUVA420P  ||
                   avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2175
                   avctx->pix_fmt == AV_PIX_FMT_GBRP     ||
2176 2177
                   avctx->pix_fmt == AV_PIX_FMT_GBRAP
                  );
2178
        avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2179
        for (p = 0; p<4; p++) {
2180
            uint8_t *line = s->picture_ptr->data[p];
2181
            int w = s->width;
2182
            int h = s->height;
2183
            if (!s->upscale_h[p])
2184
                continue;
2185
            if (p==1 || p==2) {
2186
                w = FF_CEIL_RSHIFT(w, hshift);
2187 2188
                h = FF_CEIL_RSHIFT(h, vshift);
            }
2189
            if (s->upscale_v[p])
2190
                h = (h+1)>>1;
2191
            av_assert0(w > 0);
2192
            for (i = 0; i < h; i++) {
2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203
                if (s->upscale_h[p] == 1) {
                    if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
                    else                      line[w - 1] = line[(w - 1) / 2];
                    for (index = w - 2; index > 0; index--) {
                        if (is16bit)
                            ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
                        else
                            line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
                    }
                } else if (s->upscale_h[p] == 2) {
                    if (is16bit) {
2204 2205 2206
                        ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 3];
                        if (w > 1)
                            ((uint16_t*)line)[w - 2] = ((uint16_t*)line)[w - 1];
2207
                    } else {
2208 2209 2210
                        line[w - 1] = line[(w - 1) / 3];
                        if (w > 1)
                            line[w - 2] = line[w - 1];
2211 2212 2213 2214
                    }
                    for (index = w - 3; index > 0; index--) {
                        line[index] = (line[index / 3] + line[(index + 1) / 3] + line[(index + 2) / 3] + 1) / 3;
                    }
2215
                }
2216 2217
                line += s->linesize[p];
            }
2218 2219
        }
    }
2220
    if (AV_RB32(s->upscale_v)) {
2221
        int p;
2222 2223 2224
        av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
                   avctx->pix_fmt == AV_PIX_FMT_YUV444P  ||
                   avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2225
                   avctx->pix_fmt == AV_PIX_FMT_YUV422P  ||
2226 2227
                   avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
                   avctx->pix_fmt == AV_PIX_FMT_YUV420P  ||
2228 2229
                   avctx->pix_fmt == AV_PIX_FMT_YUV440P  ||
                   avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2230
                   avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2231 2232
                   avctx->pix_fmt == AV_PIX_FMT_YUVA420P  ||
                   avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2233
                   avctx->pix_fmt == AV_PIX_FMT_GBRP     ||
2234 2235
                   avctx->pix_fmt == AV_PIX_FMT_GBRAP
                   );
2236
        avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2237
        for (p = 0; p < 4; p++) {
2238
            uint8_t *dst;
2239
            int w = s->width;
2240
            int h = s->height;
2241
            if (!s->upscale_v[p])
2242
                continue;
2243
            if (p==1 || p==2) {
2244
                w = FF_CEIL_RSHIFT(w, hshift);
2245 2246 2247 2248
                h = FF_CEIL_RSHIFT(h, vshift);
            }
            dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
            for (i = h - 1; i; i--) {
2249 2250
                uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
                uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2251
                if (src1 == src2 || i == h - 1) {
2252 2253 2254 2255 2256 2257
                    memcpy(dst, src1, w);
                } else {
                    for (index = 0; index < w; index++)
                        dst[index] = (src1[index] + src2[index]) >> 1;
                }
                dst -= s->linesize[p];
2258 2259 2260
            }
        }
    }
2261
    if (s->flipped) {
2262
        int j;
2263 2264 2265
        avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
        for (index=0; index<4; index++) {
            uint8_t *dst = s->picture_ptr->data[index];
2266 2267
            int w = s->picture_ptr->width;
            int h = s->picture_ptr->height;
2268
            if(index && index<3){
2269 2270
                w = FF_CEIL_RSHIFT(w, hshift);
                h = FF_CEIL_RSHIFT(h, vshift);
2271 2272
            }
            if(dst){
2273
                uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2274 2275 2276
                for (i=0; i<h/2; i++) {
                    for (j=0; j<w; j++)
                        FFSWAP(int, dst[j], dst2[j]);
2277 2278
                    dst  += s->picture_ptr->linesize[index];
                    dst2 -= s->picture_ptr->linesize[index];
2279 2280 2281
                }
            }
        }
2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303
    }
    if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
        int w = s->picture_ptr->width;
        int h = s->picture_ptr->height;
        for (i=0; i<h; i++) {
            int j;
            uint8_t *dst[4];
            for (index=0; index<4; index++) {
                dst[index] =   s->picture_ptr->data[index]
                             + s->picture_ptr->linesize[index]*i;
            }
            for (j=0; j<w; j++) {
                int k = dst[3][j];
                int r = dst[0][j] * k;
                int g = dst[1][j] * k;
                int b = dst[2][j] * k;
                dst[0][j] = g*257 >> 16;
                dst[1][j] = b*257 >> 16;
                dst[2][j] = r*257 >> 16;
                dst[3][j] = 255;
            }
        }
2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325
    }
    if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
        int w = s->picture_ptr->width;
        int h = s->picture_ptr->height;
        for (i=0; i<h; i++) {
            int j;
            uint8_t *dst[4];
            for (index=0; index<4; index++) {
                dst[index] =   s->picture_ptr->data[index]
                             + s->picture_ptr->linesize[index]*i;
            }
            for (j=0; j<w; j++) {
                int k = dst[3][j];
                int r = (255 - dst[0][j]) * k;
                int g = (128 - dst[1][j]) * k;
                int b = (128 - dst[2][j]) * k;
                dst[0][j] = r*257 >> 16;
                dst[1][j] = (g*257 >> 16) + 128;
                dst[2][j] = (b*257 >> 16) + 128;
                dst[3][j] = 255;
            }
        }
2326 2327
    }

2328 2329 2330 2331 2332 2333 2334 2335 2336
    if (s->stereo3d) {
        AVStereo3D *stereo = av_stereo3d_create_side_data(data);
        if (stereo) {
            stereo->type  = s->stereo3d->type;
            stereo->flags = s->stereo3d->flags;
        }
        av_freep(&s->stereo3d);
    }

2337 2338 2339
    av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
    av_dict_free(&s->exif_metadata);

2340
    av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2341 2342
           buf_end - buf_ptr);
//  return buf_end - buf_ptr;
2343 2344 2345
    return buf_ptr - buf;
}

2346
av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2347 2348 2349 2350
{
    MJpegDecodeContext *s = avctx->priv_data;
    int i, j;

2351 2352 2353 2354
    if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
        av_log(avctx, AV_LOG_INFO, "Single field\n");
    }

2355 2356 2357 2358
    if (s->picture) {
        av_frame_free(&s->picture);
        s->picture_ptr = NULL;
    } else if (s->picture_ptr)
2359
        av_frame_unref(s->picture_ptr);
2360

2361
    av_freep(&s->buffer);
2362
    av_freep(&s->stereo3d);
2363
    av_freep(&s->ljpeg_buffer);
2364
    s->ljpeg_buffer_size = 0;
2365

2366 2367
    for (i = 0; i < 3; i++) {
        for (j = 0; j < 4; j++)
2368
            ff_free_vlc(&s->vlcs[i][j]);
2369
    }
2370
    for (i = 0; i < MAX_COMPONENTS; i++) {
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Loren Merritt committed
2371 2372 2373
        av_freep(&s->blocks[i]);
        av_freep(&s->last_nnz[i]);
    }
2374
    av_dict_free(&s->exif_metadata);
2375 2376 2377
    return 0;
}

2378 2379 2380 2381 2382 2383
static void decode_flush(AVCodecContext *avctx)
{
    MJpegDecodeContext *s = avctx->priv_data;
    s->got_picture = 0;
}

2384
#if CONFIG_MJPEG_DECODER
2385 2386 2387
#define OFFSET(x) offsetof(MJpegDecodeContext, x)
#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
static const AVOption options[] = {
2388
    { "extern_huff", "Use external huffman table.",
2389
      OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
2390 2391 2392 2393 2394 2395 2396 2397 2398 2399
    { NULL },
};

static const AVClass mjpegdec_class = {
    .class_name = "MJPEG decoder",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
};

2400
AVCodec ff_mjpeg_decoder = {
2401
    .name           = "mjpeg",
2402
    .long_name      = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2403
    .type           = AVMEDIA_TYPE_VIDEO,
2404
    .id             = AV_CODEC_ID_MJPEG,
2405 2406 2407 2408
    .priv_data_size = sizeof(MJpegDecodeContext),
    .init           = ff_mjpeg_decode_init,
    .close          = ff_mjpeg_decode_end,
    .decode         = ff_mjpeg_decode_frame,
2409
    .flush          = decode_flush,
2410
    .capabilities   = AV_CODEC_CAP_DR1,
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Michael Niedermayer committed
2411
    .max_lowres     = 3,
2412
    .priv_class     = &mjpegdec_class,
2413
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
2414
};
2415 2416
#endif
#if CONFIG_THP_DECODER
2417
AVCodec ff_thp_decoder = {
2418
    .name           = "thp",
2419
    .long_name      = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2420
    .type           = AVMEDIA_TYPE_VIDEO,
2421
    .id             = AV_CODEC_ID_THP,
2422 2423 2424 2425
    .priv_data_size = sizeof(MJpegDecodeContext),
    .init           = ff_mjpeg_decode_init,
    .close          = ff_mjpeg_decode_end,
    .decode         = ff_mjpeg_decode_frame,
2426
    .flush          = decode_flush,
2427
    .capabilities   = AV_CODEC_CAP_DR1,
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2428
    .max_lowres     = 3,
2429
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
2430
};
2431
#endif