mirror of
https://github.com/FFmpeg/FFmpeg.git
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3c3704d281
Since decoding is doing from the end and aligned by 16 previous code worked correctly only when picture height was dividable by 16, otherwise it provides garbage in top lines and truncates bottom. New code adjusts data[] pointers taking in account alignment issue. Originally committed as revision 10727 to svn://svn.ffmpeg.org/ffmpeg/trunk
1381 lines
45 KiB
C
1381 lines
45 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 mjpegdec.c
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* MJPEG decoder.
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*/
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//#define DEBUG
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#include <assert.h>
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#include "avcodec.h"
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#include "dsputil.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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static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table,
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int nb_codes, int use_static, int is_ac)
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{
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uint8_t huff_size[256+16];
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uint16_t huff_code[256+16];
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assert(nb_codes <= 256);
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memset(huff_size, 0, sizeof(huff_size));
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ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
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if(is_ac){
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memmove(huff_size+16, huff_size, sizeof(uint8_t)*nb_codes);
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memmove(huff_code+16, huff_code, sizeof(uint16_t)*nb_codes);
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memset(huff_size, 0, sizeof(uint8_t)*16);
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memset(huff_code, 0, sizeof(uint16_t)*16);
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nb_codes += 16;
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}
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return init_vlc(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 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], ff_mjpeg_bits_dc_luminance,
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ff_mjpeg_val_dc_luminance, 12, 0, 0);
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build_vlc(&s->vlcs[0][1], ff_mjpeg_bits_dc_chrominance,
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ff_mjpeg_val_dc_chrominance, 12, 0, 0);
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build_vlc(&s->vlcs[1][0], ff_mjpeg_bits_ac_luminance,
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ff_mjpeg_val_ac_luminance, 251, 0, 1);
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build_vlc(&s->vlcs[1][1], ff_mjpeg_bits_ac_chrominance,
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ff_mjpeg_val_ac_chrominance, 251, 0, 1);
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}
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int ff_mjpeg_decode_init(AVCodecContext *avctx)
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{
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MJpegDecodeContext *s = avctx->priv_data;
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s->avctx = avctx;
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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->org_height = avctx->coded_height;
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build_basic_mjpeg_vlc(s);
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if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
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{
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av_log(avctx, AV_LOG_INFO, "mjpeg: 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, "mjpeg: 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->extradata_size > 9 &&
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AV_RL32(avctx->extradata + 4) == MKTAG('f','i','e','l')) {
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if (avctx->extradata[9] == 6) { /* quicktime icefloe 019 */
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s->interlace_polarity = 1; /* bottom field first */
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av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
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}
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}
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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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/* only 8 bit precision handled */
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if (get_bits(&s->gb, 4) != 0)
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{
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av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
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return -1;
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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, 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(
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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", 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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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 -1;
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class = get_bits(&s->gb, 4);
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if (class >= 2)
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return -1;
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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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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 -1;
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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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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(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1, 0, class > 0) < 0){
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return -1;
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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;
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/* XXX: verify len field validity */
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len = get_bits(&s->gb, 16);
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s->bits= get_bits(&s->gb, 8);
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if(s->pegasus_rct) s->bits=9;
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if(s->bits==9 && !s->pegasus_rct) s->rct=1; //FIXME ugly
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if (s->bits != 8 && !s->lossless){
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av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\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(avcodec_check_dimensions(s->avctx, width, height))
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return -1;
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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->ls && !(s->bits <= 8 || nb_components == 1)){
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av_log(s->avctx, AV_LOG_ERROR, "only <= 8 bits/component or 16-bit gray accepted for JPEG-LS\n");
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return -1;
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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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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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s->h_count[i] = get_bits(&s->gb, 4);
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s->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 (s->h_count[i] > s->h_max)
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s->h_max = s->h_count[i];
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if (s->v_count[i] > s->v_max)
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s->v_max = s->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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return -1;
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av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n", i, s->h_count[i],
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s->v_count[i], 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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av_log(s->avctx, AV_LOG_ERROR, "Subsampling in JPEG-LS is not supported.\n");
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return -1;
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}
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if(s->v_max==1 && s->h_max==1 && s->lossless==1) s->rgb=1;
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/* if different size, realloc/alloc picture */
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/* XXX: also check h_count and v_count */
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if (width != s->width || height != s->height) {
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av_freep(&s->qscale_table);
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s->width = width;
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s->height = height;
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s->interlaced = 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.interlaced_frame = 1;
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s->picture.top_field_first = !s->interlace_polarity;
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height *= 2;
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}
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avcodec_set_dimensions(s->avctx, width, height);
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s->qscale_table= av_mallocz((s->width+15)/16);
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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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return 0;
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/* XXX: not complete test ! */
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pix_fmt_id = (s->h_count[0] << 20) | (s->v_count[0] << 16) |
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(s->h_count[1] << 12) | (s->v_count[1] << 8) |
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(s->h_count[2] << 4) | s->v_count[2];
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av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
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switch(pix_fmt_id){
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case 0x222222:
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case 0x111111:
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if(s->rgb){
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s->avctx->pix_fmt = PIX_FMT_RGB32;
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}else if(s->nb_components==3)
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s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
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else
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s->avctx->pix_fmt = PIX_FMT_GRAY8;
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break;
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case 0x110000:
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s->avctx->pix_fmt = PIX_FMT_GRAY8;
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break;
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case 0x121111:
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s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV440P : PIX_FMT_YUVJ440P;
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break;
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case 0x211111:
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case 0x221212:
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s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
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break;
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case 0x221111:
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s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P;
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break;
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default:
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av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
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return -1;
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}
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if(s->ls){
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if(s->nb_components > 1)
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s->avctx->pix_fmt = PIX_FMT_RGB24;
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else if(s->bits <= 8)
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s->avctx->pix_fmt = PIX_FMT_GRAY8;
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else
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s->avctx->pix_fmt = PIX_FMT_GRAY16;
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}
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if(s->picture.data[0])
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s->avctx->release_buffer(s->avctx, &s->picture);
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s->picture.reference= 0;
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if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
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av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
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return -1;
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}
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s->picture.pict_type= I_TYPE;
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s->picture.key_frame= 1;
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for(i=0; i<3; i++){
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s->linesize[i]= s->picture.linesize[i] << s->interlaced;
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}
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// printf("%d %d %d %d %d %d\n", s->width, s->height, s->linesize[0], s->linesize[1], s->interlaced, s->avctx->height);
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if (len != (8+(3*nb_components)))
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{
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av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
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}
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/* totally blank picture as progressive JPEG will only add details to it */
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if(s->progressive){
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memset(s->picture.data[0], 0, s->picture.linesize[0] * s->height);
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memset(s->picture.data[1], 0, s->picture.linesize[1] * s->height >> (s->v_max - s->v_count[1]));
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memset(s->picture.data[2], 0, s->picture.linesize[2] * s->height >> (s->v_max - s->v_count[2]));
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}
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return 0;
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}
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static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
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{
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int code;
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code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
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if (code < 0)
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{
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av_log(s->avctx, AV_LOG_WARNING, "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n", 0, dc_index,
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&s->vlcs[0][dc_index]);
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return 0xffff;
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}
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if(code)
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return get_xbits(&s->gb, code);
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else
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return 0;
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}
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/* decode block and dequantize */
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static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
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int component, int dc_index, int ac_index, int16_t *quant_matrix)
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{
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int code, i, j, level, val;
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/* DC coef */
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val = mjpeg_decode_dc(s, dc_index);
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if (val == 0xffff) {
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av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
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return -1;
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}
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val = val * quant_matrix[0] + s->last_dc[component];
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s->last_dc[component] = val;
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block[0] = val;
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/* AC coefs */
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i = 0;
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{OPEN_READER(re, &s->gb)
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for(;;) {
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UPDATE_CACHE(re, &s->gb);
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GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
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/* EOB */
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if (code == 0x10)
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break;
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i += ((unsigned)code) >> 4;
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if(code != 0x100){
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code &= 0xf;
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if(code > MIN_CACHE_BITS - 16){
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UPDATE_CACHE(re, &s->gb)
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}
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{
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int cache=GET_CACHE(re,&s->gb);
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int sign=(~cache)>>31;
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level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
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}
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LAST_SKIP_BITS(re, &s->gb, code)
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if (i >= 63) {
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if(i == 63){
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j = s->scantable.permutated[63];
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block[j] = level * quant_matrix[j];
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break;
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}
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av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
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return -1;
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}
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j = s->scantable.permutated[i];
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block[j] = level * quant_matrix[j];
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}
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}
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CLOSE_READER(re, &s->gb)}
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return 0;
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}
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/* decode block and dequantize - progressive JPEG version */
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static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block,
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int component, int dc_index, int ac_index, int16_t *quant_matrix,
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int ss, int se, int Ah, int Al, int *EOBRUN)
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{
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int code, i, j, level, val, run;
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/* DC coef */
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if(!ss){
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val = mjpeg_decode_dc(s, dc_index);
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if (val == 0xffff) {
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av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
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return -1;
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}
|
|
val = (val * quant_matrix[0] << Al) + s->last_dc[component];
|
|
}else
|
|
val = 0;
|
|
s->last_dc[component] = val;
|
|
block[0] = val;
|
|
if(!se) return 0;
|
|
/* AC coefs */
|
|
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[1][ac_index].table, 9, 2)
|
|
/* Progressive JPEG use AC coeffs from zero and this decoder sets offset 16 by default */
|
|
code -= 16;
|
|
if(code & 0xF) {
|
|
i += ((unsigned) code) >> 4;
|
|
code &= 0xf;
|
|
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 -1;
|
|
}
|
|
j = s->scantable.permutated[i];
|
|
block[j] = level * quant_matrix[j] << Al;
|
|
}else{
|
|
run = ((unsigned) code) >> 4;
|
|
if(run == 0xF){// ZRL - skip 15 coefficients
|
|
i += 15;
|
|
}else{
|
|
val = run;
|
|
run = (1 << run);
|
|
UPDATE_CACHE(re, &s->gb);
|
|
run += (GET_CACHE(re, &s->gb) >> (32 - val)) & (run - 1);
|
|
if(val)
|
|
LAST_SKIP_BITS(re, &s->gb, val);
|
|
*EOBRUN = run - 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
CLOSE_READER(re, &s->gb)}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){
|
|
int i, mb_x, mb_y;
|
|
uint16_t buffer[32768][4];
|
|
int left[3], top[3], topleft[3];
|
|
const int linesize= s->linesize[0];
|
|
const int mask= (1<<s->bits)-1;
|
|
|
|
if((unsigned)s->mb_width > 32768) //dynamic alloc
|
|
return -1;
|
|
|
|
for(i=0; i<3; i++){
|
|
buffer[0][i]= 1 << (s->bits + point_transform - 1);
|
|
}
|
|
for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
|
|
const int modified_predictor= mb_y ? predictor : 1;
|
|
uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
|
|
|
|
if (s->interlaced && s->bottom_field)
|
|
ptr += linesize >> 1;
|
|
|
|
for(i=0; i<3; i++){
|
|
top[i]= left[i]= topleft[i]= buffer[0][i];
|
|
}
|
|
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
|
|
if (s->restart_interval && !s->restart_count)
|
|
s->restart_count = s->restart_interval;
|
|
|
|
for(i=0;i<3;i++) {
|
|
int pred;
|
|
|
|
topleft[i]= top[i];
|
|
top[i]= buffer[mb_x][i];
|
|
|
|
PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
|
|
|
|
left[i]=
|
|
buffer[mb_x][i]= mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
|
|
}
|
|
|
|
if (s->restart_interval && !--s->restart_count) {
|
|
align_get_bits(&s->gb);
|
|
skip_bits(&s->gb, 16); /* skip RSTn */
|
|
}
|
|
}
|
|
|
|
if(s->rct){
|
|
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
|
|
ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200)>>2);
|
|
ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
|
|
ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
|
|
}
|
|
}else if(s->pegasus_rct){
|
|
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
|
|
ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2])>>2);
|
|
ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
|
|
ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
|
|
}
|
|
}else{
|
|
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
|
|
ptr[4*mb_x+0] = buffer[mb_x][0];
|
|
ptr[4*mb_x+1] = buffer[mb_x][1];
|
|
ptr[4*mb_x+2] = buffer[mb_x][2];
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point_transform){
|
|
int i, mb_x, mb_y;
|
|
const int nb_components=3;
|
|
|
|
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;
|
|
|
|
if(mb_x==0 || mb_y==0 || s->interlaced){
|
|
for(i=0;i<nb_components;i++) {
|
|
uint8_t *ptr;
|
|
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];
|
|
|
|
for(j=0; j<n; j++) {
|
|
int pred;
|
|
|
|
ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
|
|
if(y==0 && mb_y==0){
|
|
if(x==0 && mb_x==0){
|
|
pred= 128 << point_transform;
|
|
}else{
|
|
pred= ptr[-1];
|
|
}
|
|
}else{
|
|
if(x==0 && mb_x==0){
|
|
pred= ptr[-linesize];
|
|
}else{
|
|
PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
|
|
}
|
|
}
|
|
|
|
if (s->interlaced && s->bottom_field)
|
|
ptr += linesize >> 1;
|
|
*ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
|
|
|
|
if (++x == h) {
|
|
x = 0;
|
|
y++;
|
|
}
|
|
}
|
|
}
|
|
}else{
|
|
for(i=0;i<nb_components;i++) {
|
|
uint8_t *ptr;
|
|
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];
|
|
|
|
for(j=0; j<n; j++) {
|
|
int pred;
|
|
|
|
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);
|
|
*ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << 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 int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int ss, int se, int Ah, int Al){
|
|
int i, mb_x, mb_y;
|
|
int EOBRUN = 0;
|
|
uint8_t* data[MAX_COMPONENTS];
|
|
int linesize[MAX_COMPONENTS];
|
|
|
|
if(Ah) return 0; /* TODO decode refinement planes too */
|
|
|
|
for(i=0; i < nb_components; i++) {
|
|
int c = s->comp_index[i];
|
|
data[c] = s->picture.data[c];
|
|
linesize[c]=s->linesize[c];
|
|
if(s->avctx->codec->id==CODEC_ID_AMV) {
|
|
//picture should be flipped upside-down for this codec
|
|
assert(!(s->avctx->flags & CODEC_FLAG_EMU_EDGE));
|
|
data[c] += (linesize[c] * (s->v_scount[i] * (8 * s->mb_height -((s->height/s->v_max)&7)) - 1 ));
|
|
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++) {
|
|
if (s->restart_interval && !s->restart_count)
|
|
s->restart_count = s->restart_interval;
|
|
|
|
for(i=0;i<nb_components;i++) {
|
|
uint8_t *ptr;
|
|
int n, h, v, x, y, c, j;
|
|
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++) {
|
|
memset(s->block, 0, sizeof(s->block));
|
|
if (!s->progressive && decode_block(s, s->block, i,
|
|
s->dc_index[i], s->ac_index[i],
|
|
s->quant_matrixes[ s->quant_index[c] ]) < 0) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
|
|
return -1;
|
|
}
|
|
if (s->progressive && decode_block_progressive(s, s->block, i,
|
|
s->dc_index[i], s->ac_index[i],
|
|
s->quant_matrixes[ s->quant_index[c] ], ss, se, Ah, Al, &EOBRUN) < 0) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
|
|
return -1;
|
|
}
|
|
// av_log(s->avctx, AV_LOG_DEBUG, "mb: %d %d processed\n", mb_y, mb_x);
|
|
ptr = data[c] +
|
|
(((linesize[c] * (v * mb_y + y) * 8) +
|
|
(h * mb_x + x) * 8) >> s->avctx->lowres);
|
|
if (s->interlaced && s->bottom_field)
|
|
ptr += linesize[c] >> 1;
|
|
//av_log(NULL, AV_LOG_DEBUG, "%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(!s->progressive)
|
|
s->dsp.idct_put(ptr, linesize[c], s->block);
|
|
else
|
|
s->dsp.idct_add(ptr, linesize[c], s->block);
|
|
if (++x == h) {
|
|
x = 0;
|
|
y++;
|
|
}
|
|
}
|
|
}
|
|
/* (< 1350) buggy workaround for Spectralfan.mov, should be fixed */
|
|
if (s->restart_interval && (s->restart_interval < 1350) &&
|
|
!--s->restart_count) {
|
|
align_get_bits(&s->gb);
|
|
skip_bits(&s->gb, 16); /* skip RSTn */
|
|
for (i=0; i<nb_components; i++) /* reset dc */
|
|
s->last_dc[i] = 1024;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int ff_mjpeg_decode_sos(MJpegDecodeContext *s)
|
|
{
|
|
int len, nb_components, i, h, v, predictor, point_transform;
|
|
int vmax, hmax, index, id;
|
|
const int block_size= s->lossless ? 1 : 8;
|
|
int ilv, prev_shift;
|
|
|
|
/* XXX: verify len field validity */
|
|
len = get_bits(&s->gb, 16);
|
|
nb_components = get_bits(&s->gb, 8);
|
|
if (len != 6+2*nb_components)
|
|
{
|
|
av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
|
|
return -1;
|
|
}
|
|
vmax = 0;
|
|
hmax = 0;
|
|
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 -1;
|
|
}
|
|
|
|
s->comp_index[i] = 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];
|
|
|
|
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 0 //buggy
|
|
switch(s->start_code)
|
|
{
|
|
case SOF0:
|
|
if (dc_index[i] > 1 || ac_index[i] > 1)
|
|
goto out_of_range;
|
|
break;
|
|
case SOF1:
|
|
case SOF2:
|
|
if (dc_index[i] > 3 || ac_index[i] > 3)
|
|
goto out_of_range;
|
|
break;
|
|
case SOF3:
|
|
if (dc_index[i] > 3 || ac_index[i] != 0)
|
|
goto out_of_range;
|
|
break;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
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 */
|
|
prev_shift = get_bits(&s->gb, 4); /* Ah */
|
|
point_transform= get_bits(&s->gb, 4); /* Al */
|
|
|
|
for(i=0;i<nb_components;i++)
|
|
s->last_dc[i] = 1024;
|
|
|
|
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 %s\n", s->lossless ? "lossless" : "sequencial DCT", s->rgb ? "RGB" : "",
|
|
predictor, point_transform, ilv, s->bits,
|
|
s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
|
|
|
|
|
|
/* 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);
|
|
|
|
if(s->lossless){
|
|
if(ENABLE_JPEGLS_DECODER && s->ls){
|
|
// for(){
|
|
// reset_ls_coding_parameters(s, 0);
|
|
|
|
ff_jpegls_decode_picture(s, predictor, point_transform, ilv);
|
|
}else{
|
|
if(s->rgb){
|
|
if(ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)
|
|
return -1;
|
|
}else{
|
|
if(ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0)
|
|
return -1;
|
|
}
|
|
}
|
|
}else{
|
|
if(mjpeg_decode_scan(s, nb_components, predictor, ilv, prev_shift, point_transform) < 0)
|
|
return -1;
|
|
}
|
|
emms_c();
|
|
return 0;
|
|
out_of_range:
|
|
av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
|
|
return -1;
|
|
}
|
|
|
|
static int mjpeg_decode_dri(MJpegDecodeContext *s)
|
|
{
|
|
if (get_bits(&s->gb, 16) != 4)
|
|
return -1;
|
|
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 < 5)
|
|
return -1;
|
|
if(8*len + get_bits_count(&s->gb) > s->gb.size_in_bits)
|
|
return -1;
|
|
|
|
id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
|
|
id = be2me_32(id);
|
|
len -= 6;
|
|
|
|
if(s->avctx->debug & FF_DEBUG_STARTCODE){
|
|
av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
|
|
}
|
|
|
|
/* buggy AVID, it puts EOI only at every 10th frame */
|
|
/* also this fourcc is used by non-avid files too, it holds some
|
|
informations, but it's always present in AVID creates files */
|
|
if (id == ff_get_fourcc("AVI1"))
|
|
{
|
|
/* structure:
|
|
4bytes AVI1
|
|
1bytes polarity
|
|
1bytes always zero
|
|
4bytes field_size
|
|
4bytes field_size_less_padding
|
|
*/
|
|
s->buggy_avid = 1;
|
|
// if (s->first_picture)
|
|
// printf("mjpeg: workarounding buggy AVID\n");
|
|
i = get_bits(&s->gb, 8);
|
|
if (i==2) s->bottom_field= 1;
|
|
else if(i==1) s->bottom_field= 0;
|
|
#if 0
|
|
skip_bits(&s->gb, 8);
|
|
skip_bits(&s->gb, 32);
|
|
skip_bits(&s->gb, 32);
|
|
len -= 10;
|
|
#endif
|
|
// if (s->interlace_polarity)
|
|
// printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
|
|
goto out;
|
|
}
|
|
|
|
// len -= 2;
|
|
|
|
if (id == ff_get_fourcc("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 == ff_get_fourcc("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 == ff_get_fourcc("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); /* unknwon always 0? */
|
|
skip_bits(&s->gb, 16); /* unknwon always 0? */
|
|
skip_bits(&s->gb, 16); /* unknwon always 0? */
|
|
switch( 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\n");
|
|
}
|
|
len -= 9;
|
|
goto out;
|
|
}
|
|
|
|
/* Apple MJPEG-A */
|
|
if ((s->start_code == APP1) && (len > (0x28 - 8)))
|
|
{
|
|
id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
|
|
id = be2me_32(id);
|
|
len -= 4;
|
|
if (id == ff_get_fourcc("mjpg")) /* Apple MJPEG-A */
|
|
{
|
|
#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_count(&s->gb) <= s->gb.size_in_bits) {
|
|
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, "mjpeg comment: '%s'\n", cbuf);
|
|
|
|
/* buggy avid, it puts EOI only at every 10th frame */
|
|
if (!strcmp(cbuf, "AVID"))
|
|
{
|
|
s->buggy_avid = 1;
|
|
// if (s->first_picture)
|
|
// printf("mjpeg: workarounding buggy AVID\n");
|
|
}
|
|
else if(!strcmp(cbuf, "CS=ITU601")){
|
|
s->cs_itu601= 1;
|
|
}
|
|
|
|
av_free(cbuf);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if 0
|
|
static int valid_marker_list[] =
|
|
{
|
|
/* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f */
|
|
/* 0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* 1 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* 2 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* 3 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* 4 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* 5 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* 6 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* 7 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* 8 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* 9 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* a */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* b */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* c */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
|
/* d */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
|
/* e */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
|
/* f */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
|
|
}
|
|
#endif
|
|
|
|
/* return the 8 bit start code value and update the search
|
|
state. Return -1 if no start code found */
|
|
static int find_marker(uint8_t **pbuf_ptr, uint8_t *buf_end)
|
|
{
|
|
uint8_t *buf_ptr;
|
|
unsigned int v, v2;
|
|
int val;
|
|
#ifdef DEBUG
|
|
int skipped=0;
|
|
#endif
|
|
|
|
buf_ptr = *pbuf_ptr;
|
|
while (buf_ptr < buf_end) {
|
|
v = *buf_ptr++;
|
|
v2 = *buf_ptr;
|
|
if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
|
|
val = *buf_ptr++;
|
|
goto found;
|
|
}
|
|
#ifdef DEBUG
|
|
skipped++;
|
|
#endif
|
|
}
|
|
val = -1;
|
|
found:
|
|
#ifdef DEBUG
|
|
av_log(NULL, AV_LOG_VERBOSE, "find_marker skipped %d bytes\n", skipped);
|
|
#endif
|
|
*pbuf_ptr = buf_ptr;
|
|
return val;
|
|
}
|
|
|
|
int ff_mjpeg_decode_frame(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
uint8_t *buf, int buf_size)
|
|
{
|
|
MJpegDecodeContext *s = avctx->priv_data;
|
|
uint8_t *buf_end, *buf_ptr;
|
|
int start_code;
|
|
AVFrame *picture = data;
|
|
|
|
buf_ptr = buf;
|
|
buf_end = buf + buf_size;
|
|
while (buf_ptr < buf_end) {
|
|
/* find start next marker */
|
|
start_code = find_marker(&buf_ptr, buf_end);
|
|
{
|
|
/* EOF */
|
|
if (start_code < 0) {
|
|
goto the_end;
|
|
} else {
|
|
av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n", start_code, buf_end - buf_ptr);
|
|
|
|
if ((buf_end - buf_ptr) > s->buffer_size)
|
|
{
|
|
av_free(s->buffer);
|
|
s->buffer_size = buf_end-buf_ptr;
|
|
s->buffer = av_malloc(s->buffer_size + FF_INPUT_BUFFER_PADDING_SIZE);
|
|
av_log(avctx, AV_LOG_DEBUG, "buffer too small, expanding to %d bytes\n",
|
|
s->buffer_size);
|
|
}
|
|
|
|
/* unescape buffer of SOS, use special treatment for JPEG-LS */
|
|
if (start_code == SOS && !s->ls)
|
|
{
|
|
uint8_t *src = buf_ptr;
|
|
uint8_t *dst = s->buffer;
|
|
|
|
while (src<buf_end)
|
|
{
|
|
uint8_t x = *(src++);
|
|
|
|
*(dst++) = x;
|
|
if (avctx->codec_id != 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;
|
|
}
|
|
}
|
|
}
|
|
init_get_bits(&s->gb, s->buffer, (dst - s->buffer)*8);
|
|
|
|
av_log(avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
|
|
(buf_end - buf_ptr) - (dst - s->buffer));
|
|
}
|
|
else if(start_code == SOS && s->ls){
|
|
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 -= 2;
|
|
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);
|
|
|
|
init_get_bits(&s->gb, dst, bit_count);
|
|
}
|
|
else
|
|
init_get_bits(&s->gb, buf_ptr, (buf_end - buf_ptr)*8);
|
|
|
|
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);
|
|
}
|
|
|
|
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(ff_mjpeg_decode_dht(s) < 0){
|
|
av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
|
|
return -1;
|
|
}
|
|
break;
|
|
case SOF0:
|
|
s->lossless=0;
|
|
s->ls=0;
|
|
s->progressive=0;
|
|
if (ff_mjpeg_decode_sof(s) < 0)
|
|
return -1;
|
|
break;
|
|
case SOF2:
|
|
s->lossless=0;
|
|
s->ls=0;
|
|
s->progressive=1;
|
|
if (ff_mjpeg_decode_sof(s) < 0)
|
|
return -1;
|
|
break;
|
|
case SOF3:
|
|
s->lossless=1;
|
|
s->ls=0;
|
|
s->progressive=0;
|
|
if (ff_mjpeg_decode_sof(s) < 0)
|
|
return -1;
|
|
break;
|
|
case SOF48:
|
|
s->lossless=1;
|
|
s->ls=1;
|
|
s->progressive=0;
|
|
if (ff_mjpeg_decode_sof(s) < 0)
|
|
return -1;
|
|
break;
|
|
case LSE:
|
|
if (!ENABLE_JPEGLS_DECODER || ff_jpegls_decode_lse(s) < 0)
|
|
return -1;
|
|
break;
|
|
case EOI:
|
|
s->cur_scan = 0;
|
|
if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
|
|
break;
|
|
eoi_parser:
|
|
{
|
|
if (s->interlaced) {
|
|
s->bottom_field ^= 1;
|
|
/* if not bottom field, do not output image yet */
|
|
if (s->bottom_field == !s->interlace_polarity)
|
|
goto not_the_end;
|
|
}
|
|
*picture = s->picture;
|
|
*data_size = sizeof(AVFrame);
|
|
|
|
if(!s->lossless){
|
|
picture->quality= FFMAX(FFMAX(s->qscale[0], s->qscale[1]), s->qscale[2]);
|
|
picture->qstride= 0;
|
|
picture->qscale_table= s->qscale_table;
|
|
memset(picture->qscale_table, picture->quality, (s->width+15)/16);
|
|
if(avctx->debug & FF_DEBUG_QP)
|
|
av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
|
|
picture->quality*= FF_QP2LAMBDA;
|
|
}
|
|
|
|
goto the_end;
|
|
}
|
|
break;
|
|
case SOS:
|
|
ff_mjpeg_decode_sos(s);
|
|
/* buggy avid puts EOI every 10-20th frame */
|
|
/* if restart period is over process EOI */
|
|
if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
|
|
goto eoi_parser;
|
|
break;
|
|
case DRI:
|
|
mjpeg_decode_dri(s);
|
|
break;
|
|
case SOF1:
|
|
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;
|
|
// default:
|
|
// printf("mjpeg: unsupported marker (%x)\n", start_code);
|
|
// break;
|
|
}
|
|
|
|
not_the_end:
|
|
/* 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));
|
|
}
|
|
}
|
|
}
|
|
the_end:
|
|
av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n", buf_end - buf_ptr);
|
|
// return buf_end - buf_ptr;
|
|
return buf_ptr - buf;
|
|
}
|
|
|
|
int ff_mjpeg_decode_end(AVCodecContext *avctx)
|
|
{
|
|
MJpegDecodeContext *s = avctx->priv_data;
|
|
int i, j;
|
|
|
|
av_free(s->buffer);
|
|
av_free(s->qscale_table);
|
|
|
|
for(i=0;i<2;i++) {
|
|
for(j=0;j<4;j++)
|
|
free_vlc(&s->vlcs[i][j]);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
AVCodec mjpeg_decoder = {
|
|
"mjpeg",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_MJPEG,
|
|
sizeof(MJpegDecodeContext),
|
|
ff_mjpeg_decode_init,
|
|
NULL,
|
|
ff_mjpeg_decode_end,
|
|
ff_mjpeg_decode_frame,
|
|
CODEC_CAP_DR1,
|
|
NULL
|
|
};
|
|
|
|
AVCodec thp_decoder = {
|
|
"thp",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_THP,
|
|
sizeof(MJpegDecodeContext),
|
|
ff_mjpeg_decode_init,
|
|
NULL,
|
|
ff_mjpeg_decode_end,
|
|
ff_mjpeg_decode_frame,
|
|
CODEC_CAP_DR1,
|
|
NULL
|
|
};
|