mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-24 03:39:45 +00:00
1387 lines
46 KiB
C
1387 lines
46 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, 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, 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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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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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] << 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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if(!(pix_fmt_id & 0x10101010))
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pix_fmt_id-= (pix_fmt_id & 0xF0F0F0F0)>>1;
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if(!(pix_fmt_id & 0x01010101))
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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 = PIX_FMT_RGB32;
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}else
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s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
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assert(s->nb_components==3);
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break;
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case 0x11000000:
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s->avctx->pix_fmt = PIX_FMT_GRAY8;
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break;
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case 0x12111100:
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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 0x21111100:
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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 0x22111100:
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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= FF_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);
|
|
|
|
if(ff_jpegls_decode_picture(s, predictor, point_transform, ilv) < 0)
|
|
return -1;
|
|
}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(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
|
|
{
|
|
const 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,
|
|
const uint8_t *buf, int buf_size)
|
|
{
|
|
MJpegDecodeContext *s = avctx->priv_data;
|
|
const 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)
|
|
{
|
|
const 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){
|
|
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 -= 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= FFMAX3(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;
|
|
}
|
|
|
|
av_cold 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,
|
|
.long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
|
|
};
|
|
|
|
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,
|
|
.long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
|
|
};
|