mirror of
https://github.com/FFmpeg/FFmpeg.git
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6060234d43
Avoids len from becoming negative and causing assertion failure Fixes: signal_sigabrt_7ffff7126425_5140_fd44dc63fa7bdd12ee34fc602231ef02.jpg Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2111 lines
73 KiB
C
2111 lines
73 KiB
C
/*
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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
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* Copyright (c) 2003-2004 Michael Niedermayer
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*
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* Support for external huffman table, various fixes (AVID workaround),
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* aspecting, new decode_frame mechanism and apple mjpeg-b support
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* by Alex Beregszaszi
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* MJPEG decoder.
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*/
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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 "copy_block.h"
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#include "internal.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 "tiff.h"
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#include "exif.h"
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#include "bytestream.h"
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static int build_vlc(VLC *vlc, const uint8_t *bits_table,
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const uint8_t *val_table, int nb_codes,
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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];
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uint16_t huff_sym[256];
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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++)
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huff_sym[i] = i + 16 * is_ac;
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if (is_ac)
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huff_sym[0] = 16 * 256;
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return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
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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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{
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build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
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avpriv_mjpeg_val_dc, 12, 0, 0);
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build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
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avpriv_mjpeg_val_dc, 12, 0, 0);
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build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
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avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
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build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
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avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
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build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
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avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
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build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
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avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
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}
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av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
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{
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MJpegDecodeContext *s = avctx->priv_data;
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if (!s->picture_ptr)
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s->picture_ptr = &s->picture;
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avcodec_get_frame_defaults(&s->picture);
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s->avctx = avctx;
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ff_hpeldsp_init(&s->hdsp, avctx->flags);
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ff_dsputil_init(&s->dsp, avctx);
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ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
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s->buffer_size = 0;
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s->buffer = NULL;
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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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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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}
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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;
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}
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/* quantize tables */
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int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
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{
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int len, index, i, j;
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len = get_bits(&s->gb, 16) - 2;
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while (len >= 65) {
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int pr = get_bits(&s->gb, 4);
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if (pr > 1) {
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av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
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return AVERROR_INVALIDDATA;
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}
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index = get_bits(&s->gb, 4);
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if (index >= 4)
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return -1;
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av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
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/* 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
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s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
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s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
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av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
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index, s->qscale[index]);
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len -= 65;
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}
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return 0;
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}
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/* decode huffman tables and build VLC decoders */
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int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
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{
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int len, index, i, class, n, v, code_max;
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uint8_t bits_table[17];
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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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while (len > 0) {
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if (len < 17)
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return AVERROR_INVALIDDATA;
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class = get_bits(&s->gb, 4);
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if (class >= 2)
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return AVERROR_INVALIDDATA;
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index = get_bits(&s->gb, 4);
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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);
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n += bits_table[i];
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}
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len -= 17;
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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);
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if (v > code_max)
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code_max = v;
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val_table[i] = v;
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}
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len -= n;
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/* 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",
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class, index, code_max + 1);
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if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
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code_max + 1, 0, class > 0)) < 0)
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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,
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code_max + 1, 0, 0)) < 0)
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return ret;
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}
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}
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return 0;
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}
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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, pix_fmt_id, ret;
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int h_count[MAX_COMPONENTS];
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int v_count[MAX_COMPONENTS];
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s->cur_scan = 0;
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s->upscale_h = s->upscale_v = 0;
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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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s->bits = get_bits(&s->gb, 8);
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if (s->pegasus_rct)
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s->bits = 9;
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if (s->bits == 9 && !s->pegasus_rct)
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s->rct = 1; // FIXME ugly
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if(s->lossless && s->avctx->lowres){
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av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
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return -1;
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}
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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
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if (s->interlaced && s->width == width && s->height == height + 1)
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height= s->height;
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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);
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if (nb_components <= 0 ||
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nb_components > MAX_COMPONENTS)
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return -1;
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if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
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if (nb_components != s->nb_components) {
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av_log(s->avctx, AV_LOG_ERROR,
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"nb_components changing in interlaced picture\n");
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return AVERROR_INVALIDDATA;
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}
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}
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if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
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avpriv_report_missing_feature(s->avctx,
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"JPEG-LS that is not <= 8 "
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"bits/component or 16-bit gray");
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return AVERROR_PATCHWELCOME;
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}
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s->nb_components = nb_components;
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s->h_max = 1;
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s->v_max = 1;
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memset(h_count, 0, sizeof(h_count));
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memset(v_count, 0, sizeof(v_count));
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for (i = 0; i < nb_components; i++) {
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/* component id */
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s->component_id[i] = get_bits(&s->gb, 8) - 1;
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h_count[i] = get_bits(&s->gb, 4);
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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)
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s->h_max = h_count[i];
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if (v_count[i] > s->v_max)
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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) {
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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,
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"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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}
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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 (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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}
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/* if different size, realloc/alloc picture */
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if ( width != s->width || height != s->height
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|| memcmp(s->h_count, h_count, sizeof(h_count))
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|| memcmp(s->v_count, v_count, sizeof(v_count))) {
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s->width = width;
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s->height = height;
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memcpy(s->h_count, h_count, sizeof(h_count));
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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->org_height != 0 &&
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s->height < ((s->org_height * 3) / 4)) {
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s->interlaced = 1;
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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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}
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ret = ff_set_dimensions(s->avctx, width, height);
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if (ret < 0)
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return ret;
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s->first_picture = 0;
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}
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if (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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}
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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;
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else if (!s->lossless)
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s->rgb = 0;
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/* XXX: not complete test ! */
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pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
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(s->h_count[1] << 20) | (s->v_count[1] << 16) |
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(s->h_count[2] << 12) | (s->v_count[2] << 8) |
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(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
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* padding of h/v_count being 4 */
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if (!(pix_fmt_id & 0xD0D0D0D0))
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pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
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if (!(pix_fmt_id & 0x0D0D0D0D))
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pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
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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 {
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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;
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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:
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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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s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
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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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av_assert0(s->nb_components == 4);
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break;
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case 0x12121100:
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case 0x22122100:
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if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
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else
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goto unk_pixfmt;
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s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
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s->upscale_v = 2;
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s->upscale_h = (pix_fmt_id == 0x22122100);
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s->chroma_height = s->height;
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break;
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case 0x21211100:
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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;
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else
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goto unk_pixfmt;
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s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
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s->upscale_v = (pix_fmt_id == 0x22211200);
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s->upscale_h = 2;
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s->chroma_height = s->height;
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break;
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case 0x22221100:
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if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
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else
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goto unk_pixfmt;
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s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
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s->upscale_v = 2;
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s->upscale_h = 2;
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s->chroma_height = s->height / 2;
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break;
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case 0x11000000:
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case 0x13000000:
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case 0x14000000:
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case 0x31000000:
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case 0x33000000:
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case 0x34000000:
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case 0x41000000:
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case 0x43000000:
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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
|
|
s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
|
|
break;
|
|
case 0x12111100:
|
|
case 0x22211100:
|
|
case 0x22112100:
|
|
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;
|
|
s->upscale_h = (pix_fmt_id == 0x22211100) * 2 + (pix_fmt_id == 0x22112100);
|
|
s->chroma_height = s->height / 2;
|
|
break;
|
|
case 0x21111100:
|
|
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;
|
|
break;
|
|
case 0x22121100:
|
|
case 0x22111200:
|
|
if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
|
|
else
|
|
goto unk_pixfmt;
|
|
s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
|
|
s->upscale_v = (pix_fmt_id == 0x22121100) + 1;
|
|
break;
|
|
case 0x22111100:
|
|
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;
|
|
s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
|
|
break;
|
|
case 0x41111100:
|
|
if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
|
|
else
|
|
goto unk_pixfmt;
|
|
s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
|
|
break;
|
|
default:
|
|
unk_pixfmt:
|
|
av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
if (s->ls) {
|
|
s->upscale_h = s->upscale_v = 0;
|
|
if (s->nb_components > 1)
|
|
s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
|
|
else if (s->bits <= 8)
|
|
s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
|
|
else
|
|
s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
|
|
}
|
|
|
|
av_frame_unref(s->picture_ptr);
|
|
if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
|
|
return -1;
|
|
s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
|
|
s->picture_ptr->key_frame = 1;
|
|
s->got_picture = 1;
|
|
|
|
for (i = 0; i < 3; i++)
|
|
s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
|
|
|
|
av_dlog(s->avctx, "%d %d %d %d %d %d\n",
|
|
s->width, s->height, s->linesize[0], s->linesize[1],
|
|
s->interlaced, s->avctx->height);
|
|
|
|
if (len != (8 + (3 * nb_components)))
|
|
av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
|
|
}
|
|
|
|
if (s->rgb && !s->lossless && !s->ls) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
/* totally blank picture as progressive JPEG will only add details to it */
|
|
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++) {
|
|
int size = bw * bh * s->h_count[i] * s->v_count[i];
|
|
av_freep(&s->blocks[i]);
|
|
av_freep(&s->last_nnz[i]);
|
|
s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
|
|
s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
|
|
if (!s->blocks[i] || !s->last_nnz[i])
|
|
return AVERROR(ENOMEM);
|
|
s->block_stride[i] = bw * s->h_count[i];
|
|
}
|
|
memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
|
|
}
|
|
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);
|
|
if (code < 0 || code > 16) {
|
|
av_log(s->avctx, AV_LOG_WARNING,
|
|
"mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
|
|
0, dc_index, &s->vlcs[0][dc_index]);
|
|
return 0xfffff;
|
|
}
|
|
|
|
if (code)
|
|
return get_xbits(&s->gb, code);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/* decode block and dequantize */
|
|
static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
|
|
int dc_index, int ac_index, int16_t *quant_matrix)
|
|
{
|
|
int code, i, j, level, val;
|
|
|
|
/* DC coef */
|
|
val = mjpeg_decode_dc(s, dc_index);
|
|
if (val == 0xfffff) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
val = val * quant_matrix[0] + s->last_dc[component];
|
|
s->last_dc[component] = val;
|
|
block[0] = val;
|
|
/* AC coefs */
|
|
i = 0;
|
|
{OPEN_READER(re, &s->gb);
|
|
do {
|
|
UPDATE_CACHE(re, &s->gb);
|
|
GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
|
|
|
|
i += ((unsigned)code) >> 4;
|
|
code &= 0xf;
|
|
if (code) {
|
|
if (code > MIN_CACHE_BITS - 16)
|
|
UPDATE_CACHE(re, &s->gb);
|
|
|
|
{
|
|
int cache = GET_CACHE(re, &s->gb);
|
|
int sign = (~cache) >> 31;
|
|
level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
|
|
}
|
|
|
|
LAST_SKIP_BITS(re, &s->gb, code);
|
|
|
|
if (i > 63) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
j = s->scantable.permutated[i];
|
|
block[j] = level * quant_matrix[j];
|
|
}
|
|
} while (i < 63);
|
|
CLOSE_READER(re, &s->gb);}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
|
|
int component, int dc_index,
|
|
int16_t *quant_matrix, int Al)
|
|
{
|
|
int val;
|
|
s->dsp.clear_block(block);
|
|
val = mjpeg_decode_dc(s, dc_index);
|
|
if (val == 0xfffff) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
val = (val * quant_matrix[0] << Al) + s->last_dc[component];
|
|
s->last_dc[component] = val;
|
|
block[0] = val;
|
|
return 0;
|
|
}
|
|
|
|
/* decode block and dequantize - progressive JPEG version */
|
|
static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
|
|
uint8_t *last_nnz, int ac_index,
|
|
int16_t *quant_matrix,
|
|
int ss, int se, int Al, int *EOBRUN)
|
|
{
|
|
int code, i, j, level, val, run;
|
|
|
|
if (*EOBRUN) {
|
|
(*EOBRUN)--;
|
|
return 0;
|
|
}
|
|
|
|
{
|
|
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);
|
|
|
|
run = ((unsigned) code) >> 4;
|
|
code &= 0xF;
|
|
if (code) {
|
|
i += run;
|
|
if (code > MIN_CACHE_BITS - 16)
|
|
UPDATE_CACHE(re, &s->gb);
|
|
|
|
{
|
|
int cache = GET_CACHE(re, &s->gb);
|
|
int sign = (~cache) >> 31;
|
|
level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
|
|
}
|
|
|
|
LAST_SKIP_BITS(re, &s->gb, code);
|
|
|
|
if (i >= se) {
|
|
if (i == se) {
|
|
j = s->scantable.permutated[se];
|
|
block[j] = level * quant_matrix[j] << Al;
|
|
break;
|
|
}
|
|
av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
j = s->scantable.permutated[i];
|
|
block[j] = level * quant_matrix[j] << Al;
|
|
} 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);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
} 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;
|
|
}
|
|
}
|
|
}
|
|
CLOSE_READER(re, &s->gb);
|
|
}
|
|
|
|
if (i > *last_nnz)
|
|
*last_nnz = i;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#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); \
|
|
}
|
|
|
|
#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; \
|
|
}
|
|
|
|
/* decode block and dequantize - progressive JPEG refinement pass */
|
|
static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
|
|
uint8_t *last_nnz,
|
|
int ac_index, int16_t *quant_matrix,
|
|
int ss, int se, int Al, int *EOBRUN)
|
|
{
|
|
int code, i = ss, j, sign, val, run;
|
|
int last = FFMIN(se, *last_nnz);
|
|
|
|
OPEN_READER(re, &s->gb);
|
|
if (*EOBRUN) {
|
|
(*EOBRUN)--;
|
|
} else {
|
|
for (; ; i++) {
|
|
UPDATE_CACHE(re, &s->gb);
|
|
GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
|
|
|
|
if (code & 0xF) {
|
|
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--;
|
|
block[j] = ((quant_matrix[j]^val) - val) << Al;
|
|
if (i == se) {
|
|
if (i > *last_nnz)
|
|
*last_nnz = i;
|
|
CLOSE_READER(re, &s->gb);
|
|
return 0;
|
|
}
|
|
} else {
|
|
run = ((unsigned) code) >> 4;
|
|
if (run == 0xF) {
|
|
ZERO_RUN;
|
|
} else {
|
|
val = run;
|
|
run = (1 << run);
|
|
if (val) {
|
|
UPDATE_CACHE(re, &s->gb);
|
|
run += SHOW_UBITS(re, &s->gb, val);
|
|
LAST_SKIP_BITS(re, &s->gb, val);
|
|
}
|
|
*EOBRUN = run - 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (i > *last_nnz)
|
|
*last_nnz = i;
|
|
}
|
|
|
|
for (; i <= last; i++) {
|
|
j = s->scantable.permutated[i];
|
|
if (block[j])
|
|
REFINE_BIT(j)
|
|
}
|
|
CLOSE_READER(re, &s->gb);
|
|
|
|
return 0;
|
|
}
|
|
#undef REFINE_BIT
|
|
#undef ZERO_RUN
|
|
|
|
static int handle_rstn(MJpegDecodeContext *s, int nb_components)
|
|
{
|
|
int i;
|
|
int reset = 0;
|
|
|
|
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 */
|
|
s->last_dc[i] = (4 << s->bits);
|
|
}
|
|
|
|
i = 8 + ((-get_bits_count(&s->gb)) & 7);
|
|
/* skip RSTn */
|
|
if (s->restart_count == 0) {
|
|
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 */
|
|
s->last_dc[i] = (4 << s->bits);
|
|
reset = 1;
|
|
} else
|
|
skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
|
|
}
|
|
}
|
|
}
|
|
return reset;
|
|
}
|
|
|
|
static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
|
|
{
|
|
int i, mb_x, mb_y;
|
|
uint16_t (*buffer)[4];
|
|
int left[4], top[4], topleft[4];
|
|
const int linesize = s->linesize[0];
|
|
const int mask = ((1 << s->bits) - 1) << point_transform;
|
|
int resync_mb_y = 0;
|
|
int resync_mb_x = 0;
|
|
|
|
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;
|
|
|
|
|
|
s->restart_count = s->restart_interval;
|
|
|
|
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;
|
|
|
|
for (i = 0; i < 4; i++)
|
|
buffer[0][i] = 1 << (s->bits - 1);
|
|
|
|
for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
|
|
uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
|
|
|
|
if (s->interlaced && s->bottom_field)
|
|
ptr += linesize >> 1;
|
|
|
|
for (i = 0; i < 4; i++)
|
|
top[i] = left[i] = topleft[i] = buffer[0][i];
|
|
|
|
for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
|
|
int modified_predictor = predictor;
|
|
|
|
if (s->restart_interval && !s->restart_count){
|
|
s->restart_count = s->restart_interval;
|
|
resync_mb_x = mb_x;
|
|
resync_mb_y = mb_y;
|
|
for(i=0; i<4; i++)
|
|
top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
|
|
}
|
|
if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
|
|
modified_predictor = 1;
|
|
|
|
for (i=0;i<nb_components;i++) {
|
|
int pred, dc;
|
|
|
|
topleft[i] = top[i];
|
|
top[i] = buffer[mb_x][i];
|
|
|
|
PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
|
|
|
|
dc = mjpeg_decode_dc(s, s->dc_index[i]);
|
|
if(dc == 0xFFFFF)
|
|
return -1;
|
|
|
|
left[i] = buffer[mb_x][i] =
|
|
mask & (pred + (dc << point_transform));
|
|
}
|
|
|
|
if (s->restart_interval && !--s->restart_count) {
|
|
align_get_bits(&s->gb);
|
|
skip_bits(&s->gb, 16); /* skip RSTn */
|
|
}
|
|
}
|
|
if (s->nb_components == 4) {
|
|
for(i=0; i<nb_components; i++) {
|
|
int c= s->comp_index[i];
|
|
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];
|
|
}
|
|
} else if(s->bits == 9) {
|
|
return AVERROR_PATCHWELCOME;
|
|
} else {
|
|
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
|
|
((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
|
|
}
|
|
}
|
|
}
|
|
} else if (s->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] - 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];
|
|
}
|
|
} 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];
|
|
}
|
|
} else {
|
|
for(i=0; i<nb_components; i++) {
|
|
int c= s->comp_index[i];
|
|
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];
|
|
}
|
|
} else if(s->bits == 9) {
|
|
return AVERROR_PATCHWELCOME;
|
|
} else {
|
|
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
|
|
((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
|
|
int point_transform, int nb_components)
|
|
{
|
|
int i, mb_x, mb_y, mask;
|
|
int bits= (s->bits+7)&~7;
|
|
int resync_mb_y = 0;
|
|
int resync_mb_x = 0;
|
|
|
|
point_transform += bits - s->bits;
|
|
mask = ((1 << s->bits) - 1) << point_transform;
|
|
|
|
av_assert0(nb_components>=1 && nb_components<=4);
|
|
|
|
for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
|
|
for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
|
|
if (s->restart_interval && !s->restart_count){
|
|
s->restart_count = s->restart_interval;
|
|
resync_mb_x = mb_x;
|
|
resync_mb_y = mb_y;
|
|
}
|
|
|
|
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;
|
|
for (i = 0; i < nb_components; i++) {
|
|
uint8_t *ptr;
|
|
uint16_t *ptr16;
|
|
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];
|
|
|
|
if(bits>8) linesize /= 2;
|
|
|
|
for(j=0; j<n; j++) {
|
|
int pred, dc;
|
|
|
|
dc = mjpeg_decode_dc(s, s->dc_index[i]);
|
|
if(dc == 0xFFFFF)
|
|
return -1;
|
|
if(bits<=8){
|
|
ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
|
|
if(y==0 && toprow){
|
|
if(x==0 && leftcol){
|
|
pred= 1 << (bits - 1);
|
|
}else{
|
|
pred= ptr[-1];
|
|
}
|
|
}else{
|
|
if(x==0 && leftcol){
|
|
pred= ptr[-linesize];
|
|
}else{
|
|
PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
|
|
}
|
|
}
|
|
|
|
if (s->interlaced && s->bottom_field)
|
|
ptr += linesize >> 1;
|
|
pred &= mask;
|
|
*ptr= pred + (dc << point_transform);
|
|
}else{
|
|
ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
|
|
if(y==0 && toprow){
|
|
if(x==0 && leftcol){
|
|
pred= 1 << (bits - 1);
|
|
}else{
|
|
pred= ptr16[-1];
|
|
}
|
|
}else{
|
|
if(x==0 && leftcol){
|
|
pred= ptr16[-linesize];
|
|
}else{
|
|
PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
|
|
}
|
|
}
|
|
|
|
if (s->interlaced && s->bottom_field)
|
|
ptr16 += linesize >> 1;
|
|
pred &= mask;
|
|
*ptr16= pred + (dc << point_transform);
|
|
}
|
|
if (++x == h) {
|
|
x = 0;
|
|
y++;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
for (i = 0; i < nb_components; i++) {
|
|
uint8_t *ptr;
|
|
uint16_t *ptr16;
|
|
int n, h, v, x, y, c, j, linesize, dc;
|
|
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];
|
|
|
|
if(bits>8) linesize /= 2;
|
|
|
|
for (j = 0; j < n; j++) {
|
|
int pred;
|
|
|
|
dc = mjpeg_decode_dc(s, s->dc_index[i]);
|
|
if(dc == 0xFFFFF)
|
|
return -1;
|
|
if(bits<=8){
|
|
ptr = s->picture.data[c] +
|
|
(linesize * (v * mb_y + y)) +
|
|
(h * mb_x + x); //FIXME optimize this crap
|
|
PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
|
|
|
|
pred &= mask;
|
|
*ptr = pred + (dc << point_transform);
|
|
}else{
|
|
ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
|
|
PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
|
|
|
|
pred &= mask;
|
|
*ptr16= pred + (dc << point_transform);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
|
|
uint8_t *dst, const uint8_t *src,
|
|
int linesize, int lowres)
|
|
{
|
|
switch (lowres) {
|
|
case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
|
|
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;
|
|
}
|
|
}
|
|
|
|
static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
|
|
{
|
|
int block_x, block_y;
|
|
int size = 8 >> s->avctx->lowres;
|
|
if (s->bits > 8) {
|
|
for (block_y=0; block_y<size; block_y++)
|
|
for (block_x=0; block_x<size; block_x++)
|
|
*(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
|
|
} else {
|
|
for (block_y=0; block_y<size; block_y++)
|
|
for (block_x=0; block_x<size; block_x++)
|
|
*(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
|
|
}
|
|
}
|
|
|
|
static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
|
|
int Al, const uint8_t *mb_bitmask,
|
|
const AVFrame *reference)
|
|
{
|
|
int i, mb_x, mb_y;
|
|
uint8_t *data[MAX_COMPONENTS];
|
|
const uint8_t *reference_data[MAX_COMPONENTS];
|
|
int linesize[MAX_COMPONENTS];
|
|
GetBitContext mb_bitmask_gb;
|
|
int bytes_per_pixel = 1 + (s->bits > 8);
|
|
|
|
if (mb_bitmask)
|
|
init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
|
|
|
|
if (s->flipped && s->avctx->lowres) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with lowres\n");
|
|
s->flipped = 0;
|
|
}
|
|
s->restart_count = 0;
|
|
for (i = 0; i < nb_components; i++) {
|
|
int c = s->comp_index[i];
|
|
data[c] = s->picture_ptr->data[c];
|
|
reference_data[c] = reference ? reference->data[c] : NULL;
|
|
linesize[c] = s->linesize[c];
|
|
s->coefs_finished[c] |= 1;
|
|
if (s->flipped && !(s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
|
|
// picture should be flipped upside-down for this codec
|
|
int offset = (linesize[c] * (s->v_scount[i] *
|
|
(8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
|
|
data[c] += offset;
|
|
reference_data[c] += offset;
|
|
linesize[c] *= -1;
|
|
}
|
|
}
|
|
|
|
for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
|
|
for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
|
|
const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
|
|
|
|
if (s->restart_interval && !s->restart_count)
|
|
s->restart_count = s->restart_interval;
|
|
|
|
if (get_bits_left(&s->gb) < 0) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
|
|
-get_bits_left(&s->gb));
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
for (i = 0; i < nb_components; i++) {
|
|
uint8_t *ptr;
|
|
int n, h, v, x, y, c, j;
|
|
int block_offset;
|
|
n = s->nb_blocks[i];
|
|
c = s->comp_index[i];
|
|
h = s->h_scount[i];
|
|
v = s->v_scount[i];
|
|
x = 0;
|
|
y = 0;
|
|
for (j = 0; j < n; j++) {
|
|
block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
|
|
(h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
|
|
|
|
if (s->interlaced && s->bottom_field)
|
|
block_offset += linesize[c] >> 1;
|
|
ptr = data[c] + block_offset;
|
|
if (!s->progressive) {
|
|
if (copy_mb)
|
|
mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
|
|
linesize[c], s->avctx->lowres);
|
|
|
|
else {
|
|
s->dsp.clear_block(s->block);
|
|
if (decode_block(s, s->block, i,
|
|
s->dc_index[i], s->ac_index[i],
|
|
s->quant_matrixes[s->quant_sindex[i]]) < 0) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"error y=%d x=%d\n", mb_y, mb_x);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
s->dsp.idct_put(ptr, linesize[c], s->block);
|
|
if (s->bits & 7)
|
|
shift_output(s, ptr, linesize[c]);
|
|
}
|
|
} else {
|
|
int block_idx = s->block_stride[c] * (v * mb_y + y) +
|
|
(h * mb_x + x);
|
|
int16_t *block = s->blocks[c][block_idx];
|
|
if (Ah)
|
|
block[0] += get_bits1(&s->gb) *
|
|
s->quant_matrixes[s->quant_sindex[i]][0] << Al;
|
|
else if (decode_dc_progressive(s, block, i, s->dc_index[i],
|
|
s->quant_matrixes[s->quant_sindex[i]],
|
|
Al) < 0) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"error y=%d x=%d\n", mb_y, mb_x);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
}
|
|
av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
|
|
av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
|
|
mb_x, mb_y, x, y, c, s->bottom_field,
|
|
(v * mb_y + y) * 8, (h * mb_x + x) * 8);
|
|
if (++x == h) {
|
|
x = 0;
|
|
y++;
|
|
}
|
|
}
|
|
}
|
|
|
|
handle_rstn(s, nb_components);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
|
|
int se, int Ah, int Al)
|
|
{
|
|
int mb_x, mb_y;
|
|
int EOBRUN = 0;
|
|
int c = s->comp_index[0];
|
|
uint8_t *data = s->picture.data[c];
|
|
int linesize = s->linesize[c];
|
|
int last_scan = 0;
|
|
int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
|
|
int bytes_per_pixel = 1 + (s->bits > 8);
|
|
|
|
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);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (!Al) {
|
|
s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
|
|
last_scan = !~s->coefs_finished[c];
|
|
}
|
|
|
|
if (s->interlaced && s->bottom_field)
|
|
data += linesize >> 1;
|
|
|
|
s->restart_count = 0;
|
|
|
|
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];
|
|
int16_t (*block)[64] = &s->blocks[c][block_idx];
|
|
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;
|
|
if (s->restart_interval && !s->restart_count)
|
|
s->restart_count = s->restart_interval;
|
|
|
|
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);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (last_scan) {
|
|
s->dsp.idct_put(ptr, linesize, *block);
|
|
if (s->bits & 7)
|
|
shift_output(s, ptr, linesize);
|
|
ptr += bytes_per_pixel*8 >> s->avctx->lowres;
|
|
}
|
|
if (handle_rstn(s, 0))
|
|
EOBRUN = 0;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
|
|
const AVFrame *reference)
|
|
{
|
|
int len, nb_components, i, h, v, predictor, point_transform;
|
|
int index, id, ret;
|
|
const int block_size = s->lossless ? 1 : 8;
|
|
int ilv, prev_shift;
|
|
|
|
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]);
|
|
/* XXX: verify len field validity */
|
|
len = get_bits(&s->gb, 16);
|
|
nb_components = get_bits(&s->gb, 8);
|
|
if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"decode_sos: nb_components (%d) unsupported\n", nb_components);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
if (len != 6 + 2 * nb_components) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
for (i = 0; i < nb_components; i++) {
|
|
id = get_bits(&s->gb, 8) - 1;
|
|
av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
|
|
/* find component index */
|
|
for (index = 0; index < s->nb_components; index++)
|
|
if (id == s->component_id[index])
|
|
break;
|
|
if (index == s->nb_components) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"decode_sos: index(%d) out of components\n", index);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
/* 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;
|
|
|
|
s->quant_sindex[i] = s->quant_index[index];
|
|
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];
|
|
|
|
if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
|
|
index = (i+2)%3;
|
|
if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
|
|
index = (index+2)%3;
|
|
|
|
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;
|
|
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))
|
|
goto out_of_range;
|
|
}
|
|
|
|
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 */
|
|
if(s->avctx->codec_tag != AV_RL32("CJPG")){
|
|
prev_shift = get_bits(&s->gb, 4); /* Ah */
|
|
point_transform = get_bits(&s->gb, 4); /* Al */
|
|
}else
|
|
prev_shift = point_transform = 0;
|
|
|
|
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);
|
|
} else if (!s->ls) { /* skip this for JPEG-LS */
|
|
h = s->h_max / s->h_scount[0];
|
|
v = s->v_max / s->v_scount[0];
|
|
s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
|
|
s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
|
|
s->nb_blocks[0] = 1;
|
|
s->h_scount[0] = 1;
|
|
s->v_scount[0] = 1;
|
|
}
|
|
|
|
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" : "",
|
|
predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
|
|
s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
|
|
|
|
|
|
/* 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);
|
|
|
|
next_field:
|
|
for (i = 0; i < nb_components; i++)
|
|
s->last_dc[i] = (4 << s->bits);
|
|
|
|
if (s->lossless) {
|
|
av_assert0(s->picture_ptr == &s->picture);
|
|
if (CONFIG_JPEGLS_DECODER && s->ls) {
|
|
// for () {
|
|
// reset_ls_coding_parameters(s, 0);
|
|
|
|
if ((ret = ff_jpegls_decode_picture(s, predictor,
|
|
point_transform, ilv)) < 0)
|
|
return ret;
|
|
} else {
|
|
if (s->rgb) {
|
|
if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
|
|
return ret;
|
|
} else {
|
|
if ((ret = ljpeg_decode_yuv_scan(s, predictor,
|
|
point_transform,
|
|
nb_components)) < 0)
|
|
return ret;
|
|
}
|
|
}
|
|
} else {
|
|
if (s->progressive && predictor) {
|
|
av_assert0(s->picture_ptr == &s->picture);
|
|
if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
|
|
ilv, prev_shift,
|
|
point_transform)) < 0)
|
|
return ret;
|
|
} else {
|
|
if ((ret = mjpeg_decode_scan(s, nb_components,
|
|
prev_shift, point_transform,
|
|
mb_bitmask, reference)) < 0)
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (s->interlaced &&
|
|
get_bits_left(&s->gb) > 32 &&
|
|
show_bits(&s->gb, 8) == 0xFF) {
|
|
GetBitContext bak = s->gb;
|
|
align_get_bits(&bak);
|
|
if (show_bits(&bak, 16) == 0xFFD1) {
|
|
av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
|
|
s->gb = bak;
|
|
skip_bits(&s->gb, 16);
|
|
s->bottom_field ^= 1;
|
|
|
|
goto next_field;
|
|
}
|
|
}
|
|
|
|
emms_c();
|
|
return 0;
|
|
out_of_range:
|
|
av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
static int mjpeg_decode_dri(MJpegDecodeContext *s)
|
|
{
|
|
if (get_bits(&s->gb, 16) != 4)
|
|
return AVERROR_INVALIDDATA;
|
|
s->restart_interval = get_bits(&s->gb, 16);
|
|
s->restart_count = 0;
|
|
av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
|
|
s->restart_interval);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mjpeg_decode_app(MJpegDecodeContext *s)
|
|
{
|
|
int len, id, i;
|
|
|
|
len = get_bits(&s->gb, 16);
|
|
if (len < 6)
|
|
return AVERROR_INVALIDDATA;
|
|
if (8 * len > get_bits_left(&s->gb))
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
id = get_bits_long(&s->gb, 32);
|
|
len -= 6;
|
|
|
|
if (s->avctx->debug & FF_DEBUG_STARTCODE)
|
|
av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X len=%d\n", id, len);
|
|
|
|
/* 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. */
|
|
if (id == AV_RB32("AVI1")) {
|
|
/* structure:
|
|
4bytes AVI1
|
|
1bytes polarity
|
|
1bytes always zero
|
|
4bytes field_size
|
|
4bytes field_size_less_padding
|
|
*/
|
|
s->buggy_avid = 1;
|
|
i = get_bits(&s->gb, 8); len--;
|
|
av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
|
|
#if 0
|
|
skip_bits(&s->gb, 8);
|
|
skip_bits(&s->gb, 32);
|
|
skip_bits(&s->gb, 32);
|
|
len -= 10;
|
|
#endif
|
|
goto out;
|
|
}
|
|
|
|
// len -= 2;
|
|
|
|
if (id == AV_RB32("JFIF")) {
|
|
int t_w, t_h, v1, v2;
|
|
skip_bits(&s->gb, 8); /* the trailing zero-byte */
|
|
v1 = get_bits(&s->gb, 8);
|
|
v2 = get_bits(&s->gb, 8);
|
|
skip_bits(&s->gb, 8);
|
|
|
|
s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
|
|
s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
|
|
|
|
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
|
|
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);
|
|
|
|
t_w = get_bits(&s->gb, 8);
|
|
t_h = get_bits(&s->gb, 8);
|
|
if (t_w && t_h) {
|
|
/* skip thumbnail */
|
|
if (len -10 - (t_w * t_h * 3) > 0)
|
|
len -= t_w * t_h * 3;
|
|
}
|
|
len -= 10;
|
|
goto out;
|
|
}
|
|
|
|
if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
|
|
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
|
|
av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
|
|
skip_bits(&s->gb, 16); /* version */
|
|
skip_bits(&s->gb, 16); /* flags0 */
|
|
skip_bits(&s->gb, 16); /* flags1 */
|
|
skip_bits(&s->gb, 8); /* transform */
|
|
len -= 7;
|
|
goto out;
|
|
}
|
|
|
|
if (id == AV_RB32("LJIF")) {
|
|
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
|
|
av_log(s->avctx, AV_LOG_INFO,
|
|
"Pegasus lossless jpeg header found\n");
|
|
skip_bits(&s->gb, 16); /* version ? */
|
|
skip_bits(&s->gb, 16); /* unknown always 0? */
|
|
skip_bits(&s->gb, 16); /* unknown always 0? */
|
|
skip_bits(&s->gb, 16); /* unknown always 0? */
|
|
switch (i=get_bits(&s->gb, 8)) {
|
|
case 1:
|
|
s->rgb = 1;
|
|
s->pegasus_rct = 0;
|
|
break;
|
|
case 2:
|
|
s->rgb = 1;
|
|
s->pegasus_rct = 1;
|
|
break;
|
|
default:
|
|
av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
|
|
}
|
|
len -= 9;
|
|
goto out;
|
|
}
|
|
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;
|
|
}
|
|
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;
|
|
}
|
|
|
|
/* EXIF metadata */
|
|
if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
|
|
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");
|
|
return ret;
|
|
}
|
|
|
|
bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
|
|
|
|
// read 0th IFD and store the metadata
|
|
// (return values > 0 indicate the presence of subimage metadata)
|
|
ret = ff_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");
|
|
return ret;
|
|
}
|
|
|
|
bytes_read = bytestream2_tell(&gbytes);
|
|
skip_bits(&s->gb, bytes_read << 3);
|
|
len -= bytes_read;
|
|
|
|
goto out;
|
|
}
|
|
|
|
/* Apple MJPEG-A */
|
|
if ((s->start_code == APP1) && (len > (0x28 - 8))) {
|
|
id = get_bits_long(&s->gb, 32);
|
|
len -= 4;
|
|
/* Apple MJPEG-A */
|
|
if (id == AV_RB32("mjpg")) {
|
|
#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)
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"mjpeg: error, decode_app parser read over the end\n");
|
|
while (--len > 0)
|
|
skip_bits(&s->gb, 8);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mjpeg_decode_com(MJpegDecodeContext *s)
|
|
{
|
|
int len = get_bits(&s->gb, 16);
|
|
if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
|
|
char *cbuf = av_malloc(len - 1);
|
|
if (cbuf) {
|
|
int i;
|
|
for (i = 0; i < len - 2; i++)
|
|
cbuf[i] = get_bits(&s->gb, 8);
|
|
if (i > 0 && cbuf[i - 1] == '\n')
|
|
cbuf[i - 1] = 0;
|
|
else
|
|
cbuf[i] = 0;
|
|
|
|
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
|
|
av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
|
|
|
|
/* buggy avid, it puts EOI only at every 10th frame */
|
|
if (!strncmp(cbuf, "AVID", 4)) {
|
|
s->buggy_avid = 1;
|
|
if (len > 14 && cbuf[12] == 1) /* 1 - NTSC, 2 - PAL */
|
|
s->interlace_polarity = 1;
|
|
} else if (!strcmp(cbuf, "CS=ITU601"))
|
|
s->cs_itu601 = 1;
|
|
else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32)) ||
|
|
(!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
|
|
s->flipped = 1;
|
|
|
|
av_free(cbuf);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* return the 8 bit start code value and update the search
|
|
state. Return -1 if no start code found */
|
|
static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
|
|
{
|
|
const uint8_t *buf_ptr;
|
|
unsigned int v, v2;
|
|
int val;
|
|
int skipped = 0;
|
|
|
|
buf_ptr = *pbuf_ptr;
|
|
while (buf_end - buf_ptr > 1) {
|
|
v = *buf_ptr++;
|
|
v2 = *buf_ptr;
|
|
if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
|
|
val = *buf_ptr++;
|
|
goto found;
|
|
}
|
|
skipped++;
|
|
}
|
|
buf_ptr = buf_end;
|
|
val = -1;
|
|
found:
|
|
av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
|
|
*pbuf_ptr = buf_ptr;
|
|
return val;
|
|
}
|
|
|
|
int ff_mjpeg_find_marker(MJpegDecodeContext *s,
|
|
const uint8_t **buf_ptr, const uint8_t *buf_end,
|
|
const uint8_t **unescaped_buf_ptr,
|
|
int *unescaped_buf_size)
|
|
{
|
|
int start_code;
|
|
start_code = find_marker(buf_ptr, buf_end);
|
|
|
|
av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
|
|
if (!s->buffer)
|
|
return AVERROR(ENOMEM);
|
|
|
|
/* 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;
|
|
|
|
while (src < buf_end) {
|
|
uint8_t x = *(src++);
|
|
|
|
*(dst++) = x;
|
|
if (s->avctx->codec_id != AV_CODEC_ID_THP) {
|
|
if (x == 0xff) {
|
|
while (src < buf_end && x == 0xff)
|
|
x = *(src++);
|
|
|
|
if (x >= 0xd0 && x <= 0xd7)
|
|
*(dst++) = x;
|
|
else if (x)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
*unescaped_buf_ptr = s->buffer;
|
|
*unescaped_buf_size = dst - s->buffer;
|
|
memset(s->buffer + *unescaped_buf_size, 0,
|
|
FF_INPUT_BUFFER_PADDING_SIZE);
|
|
|
|
av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
|
|
(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;
|
|
|
|
s->cur_scan++;
|
|
|
|
/* 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) {
|
|
t -= FFMIN(2, t);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
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++];
|
|
put_bits(&pb, 7, x);
|
|
bit_count--;
|
|
}
|
|
}
|
|
flush_put_bits(&pb);
|
|
|
|
*unescaped_buf_ptr = dst;
|
|
*unescaped_buf_size = (bit_count + 7) >> 3;
|
|
memset(s->buffer + *unescaped_buf_size, 0,
|
|
FF_INPUT_BUFFER_PADDING_SIZE);
|
|
} else {
|
|
*unescaped_buf_ptr = *buf_ptr;
|
|
*unescaped_buf_size = buf_end - *buf_ptr;
|
|
}
|
|
|
|
return start_code;
|
|
}
|
|
|
|
int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
|
|
AVPacket *avpkt)
|
|
{
|
|
const uint8_t *buf = avpkt->data;
|
|
int buf_size = avpkt->size;
|
|
MJpegDecodeContext *s = avctx->priv_data;
|
|
const uint8_t *buf_end, *buf_ptr;
|
|
const uint8_t *unescaped_buf_ptr;
|
|
int hshift, vshift;
|
|
int unescaped_buf_size;
|
|
int start_code;
|
|
int i, index;
|
|
int ret = 0;
|
|
|
|
av_dict_free(&s->exif_metadata);
|
|
|
|
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,
|
|
&unescaped_buf_ptr,
|
|
&unescaped_buf_size);
|
|
/* EOF */
|
|
if (start_code < 0) {
|
|
goto the_end;
|
|
} 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",
|
|
start_code, unescaped_buf_size, buf_size);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
|
|
start_code, buf_end - buf_ptr);
|
|
|
|
ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
|
|
|
|
if (ret < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
|
|
goto fail;
|
|
}
|
|
|
|
s->start_code = start_code;
|
|
if (s->avctx->debug & FF_DEBUG_STARTCODE)
|
|
av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
|
|
|
|
/* 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);
|
|
|
|
ret = -1;
|
|
|
|
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);
|
|
}
|
|
|
|
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");
|
|
goto fail;
|
|
}
|
|
break;
|
|
case SOF0:
|
|
case SOF1:
|
|
s->lossless = 0;
|
|
s->ls = 0;
|
|
s->progressive = 0;
|
|
if ((ret = ff_mjpeg_decode_sof(s)) < 0)
|
|
goto fail;
|
|
break;
|
|
case SOF2:
|
|
s->lossless = 0;
|
|
s->ls = 0;
|
|
s->progressive = 1;
|
|
if ((ret = ff_mjpeg_decode_sof(s)) < 0)
|
|
goto fail;
|
|
break;
|
|
case SOF3:
|
|
s->lossless = 1;
|
|
s->ls = 0;
|
|
s->progressive = 0;
|
|
if ((ret = ff_mjpeg_decode_sof(s)) < 0)
|
|
goto fail;
|
|
break;
|
|
case SOF48:
|
|
s->lossless = 1;
|
|
s->ls = 1;
|
|
s->progressive = 0;
|
|
if ((ret = ff_mjpeg_decode_sof(s)) < 0)
|
|
goto fail;
|
|
break;
|
|
case LSE:
|
|
if (!CONFIG_JPEGLS_DECODER ||
|
|
(ret = ff_jpegls_decode_lse(s)) < 0)
|
|
goto fail;
|
|
break;
|
|
case EOI:
|
|
eoi_parser:
|
|
s->cur_scan = 0;
|
|
if (!s->got_picture) {
|
|
av_log(avctx, AV_LOG_WARNING,
|
|
"Found EOI before any SOF, ignoring\n");
|
|
break;
|
|
}
|
|
if (s->interlaced) {
|
|
s->bottom_field ^= 1;
|
|
/* if not bottom field, do not output image yet */
|
|
if (s->bottom_field == !s->interlace_polarity)
|
|
break;
|
|
}
|
|
if ((ret = av_frame_ref(data, s->picture_ptr)) < 0)
|
|
return ret;
|
|
*got_frame = 1;
|
|
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);
|
|
}
|
|
|
|
if(avctx->debug & FF_DEBUG_QP)
|
|
av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
|
|
}
|
|
|
|
goto the_end;
|
|
case SOS:
|
|
if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
|
|
(avctx->err_recognition & AV_EF_EXPLODE))
|
|
goto fail;
|
|
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;
|
|
}
|
|
|
|
/* 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));
|
|
}
|
|
if (s->got_picture) {
|
|
av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
|
|
goto eoi_parser;
|
|
}
|
|
av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
|
|
return AVERROR_INVALIDDATA;
|
|
fail:
|
|
s->got_picture = 0;
|
|
return ret;
|
|
the_end:
|
|
if (s->upscale_h) {
|
|
uint8_t *line = s->picture_ptr->data[s->upscale_h];
|
|
av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
|
|
avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
|
|
avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
|
|
avctx->pix_fmt == AV_PIX_FMT_YUV440P);
|
|
for (i = 0; i < s->chroma_height; i++) {
|
|
for (index = s->width - 1; index; index--)
|
|
line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
|
|
line += s->linesize[s->upscale_h];
|
|
}
|
|
}
|
|
if (s->upscale_v) {
|
|
uint8_t *dst = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(s->height - 1) * s->linesize[s->upscale_v]];
|
|
int w;
|
|
avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
|
|
w = s->width >> hshift;
|
|
av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
|
|
avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
|
|
avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
|
|
avctx->pix_fmt == AV_PIX_FMT_YUV422P);
|
|
for (i = s->height - 1; i; i--) {
|
|
uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[i / 2 * s->linesize[s->upscale_v]];
|
|
uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(i + 1) / 2 * s->linesize[s->upscale_v]];
|
|
if (src1 == src2) {
|
|
memcpy(dst, src1, w);
|
|
} else {
|
|
for (index = 0; index < w; index++)
|
|
dst[index] = (src1[index] + src2[index]) >> 1;
|
|
}
|
|
dst -= s->linesize[s->upscale_v];
|
|
}
|
|
}
|
|
if (s->flipped && (s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
|
|
int j;
|
|
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];
|
|
int w = s->width;
|
|
int h = s->height;
|
|
if(index && index<3){
|
|
w = FF_CEIL_RSHIFT(w, hshift);
|
|
h = FF_CEIL_RSHIFT(h, vshift);
|
|
}
|
|
if(dst){
|
|
uint8_t *dst2 = dst + s->linesize[index]*(h-1);
|
|
for (i=0; i<h/2; i++) {
|
|
for (j=0; j<w; j++)
|
|
FFSWAP(int, dst[j], dst2[j]);
|
|
dst += s->linesize[index];
|
|
dst2 -= s->linesize[index];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
|
|
av_dict_free(&s->exif_metadata);
|
|
|
|
av_log(avctx, AV_LOG_DEBUG, "decode frame unused %td bytes\n",
|
|
buf_end - buf_ptr);
|
|
// return buf_end - buf_ptr;
|
|
return buf_ptr - buf;
|
|
}
|
|
|
|
av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
|
|
{
|
|
MJpegDecodeContext *s = avctx->priv_data;
|
|
int i, j;
|
|
|
|
if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
|
|
av_log(avctx, AV_LOG_INFO, "Single field\n");
|
|
}
|
|
|
|
if (s->picture_ptr)
|
|
av_frame_unref(s->picture_ptr);
|
|
|
|
av_free(s->buffer);
|
|
av_freep(&s->ljpeg_buffer);
|
|
s->ljpeg_buffer_size = 0;
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
for (j = 0; j < 4; j++)
|
|
ff_free_vlc(&s->vlcs[i][j]);
|
|
}
|
|
for (i = 0; i < MAX_COMPONENTS; i++) {
|
|
av_freep(&s->blocks[i]);
|
|
av_freep(&s->last_nnz[i]);
|
|
}
|
|
av_dict_free(&s->exif_metadata);
|
|
return 0;
|
|
}
|
|
|
|
static void decode_flush(AVCodecContext *avctx)
|
|
{
|
|
MJpegDecodeContext *s = avctx->priv_data;
|
|
s->got_picture = 0;
|
|
}
|
|
|
|
#if CONFIG_MJPEG_DECODER
|
|
#define OFFSET(x) offsetof(MJpegDecodeContext, x)
|
|
#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
|
|
static const AVOption options[] = {
|
|
{ "extern_huff", "Use external huffman table.",
|
|
OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
|
|
{ NULL },
|
|
};
|
|
|
|
static const AVClass mjpegdec_class = {
|
|
.class_name = "MJPEG decoder",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
AVCodec ff_mjpeg_decoder = {
|
|
.name = "mjpeg",
|
|
.long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_MJPEG,
|
|
.priv_data_size = sizeof(MJpegDecodeContext),
|
|
.init = ff_mjpeg_decode_init,
|
|
.close = ff_mjpeg_decode_end,
|
|
.decode = ff_mjpeg_decode_frame,
|
|
.flush = decode_flush,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
.max_lowres = 3,
|
|
.priv_class = &mjpegdec_class,
|
|
};
|
|
#endif
|
|
#if CONFIG_THP_DECODER
|
|
AVCodec ff_thp_decoder = {
|
|
.name = "thp",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_THP,
|
|
.priv_data_size = sizeof(MJpegDecodeContext),
|
|
.init = ff_mjpeg_decode_init,
|
|
.close = ff_mjpeg_decode_end,
|
|
.decode = ff_mjpeg_decode_frame,
|
|
.flush = decode_flush,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
.max_lowres = 3,
|
|
};
|
|
#endif
|