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Diffstat (limited to 'contrib/ffmpeg/libavcodec/mjpegdec.c')
-rw-r--r--contrib/ffmpeg/libavcodec/mjpegdec.c1380
1 files changed, 0 insertions, 1380 deletions
diff --git a/contrib/ffmpeg/libavcodec/mjpegdec.c b/contrib/ffmpeg/libavcodec/mjpegdec.c
deleted file mode 100644
index e4184d54b..000000000
--- a/contrib/ffmpeg/libavcodec/mjpegdec.c
+++ /dev/null
@@ -1,1380 +0,0 @@
-/*
- * MJPEG decoder
- * Copyright (c) 2000, 2001 Fabrice Bellard.
- * Copyright (c) 2003 Alex Beregszaszi
- * Copyright (c) 2003-2004 Michael Niedermayer
- *
- * Support for external huffman table, various fixes (AVID workaround),
- * aspecting, new decode_frame mechanism and apple mjpeg-b support
- * by Alex Beregszaszi
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file mjpegdec.c
- * MJPEG decoder.
- */
-
-//#define DEBUG
-#include <assert.h>
-
-#include "avcodec.h"
-#include "dsputil.h"
-#include "mjpeg.h"
-#include "mjpegdec.h"
-#include "jpeglsdec.h"
-
-
-static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table,
- int nb_codes, int use_static, int is_ac)
-{
- uint8_t huff_size[256+16];
- uint16_t huff_code[256+16];
-
- assert(nb_codes <= 256);
-
- memset(huff_size, 0, sizeof(huff_size));
- ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
-
- if(is_ac){
- memmove(huff_size+16, huff_size, sizeof(uint8_t)*nb_codes);
- memmove(huff_code+16, huff_code, sizeof(uint16_t)*nb_codes);
- memset(huff_size, 0, sizeof(uint8_t)*16);
- memset(huff_code, 0, sizeof(uint16_t)*16);
- nb_codes += 16;
- }
-
- return init_vlc(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2, use_static);
-}
-
-static void build_basic_mjpeg_vlc(MJpegDecodeContext * s) {
- build_vlc(&s->vlcs[0][0], ff_mjpeg_bits_dc_luminance,
- ff_mjpeg_val_dc_luminance, 12, 0, 0);
- build_vlc(&s->vlcs[0][1], ff_mjpeg_bits_dc_chrominance,
- ff_mjpeg_val_dc_chrominance, 12, 0, 0);
- build_vlc(&s->vlcs[1][0], ff_mjpeg_bits_ac_luminance,
- ff_mjpeg_val_ac_luminance, 251, 0, 1);
- build_vlc(&s->vlcs[1][1], ff_mjpeg_bits_ac_chrominance,
- ff_mjpeg_val_ac_chrominance, 251, 0, 1);
-}
-
-int ff_mjpeg_decode_init(AVCodecContext *avctx)
-{
- MJpegDecodeContext *s = avctx->priv_data;
-
- s->avctx = avctx;
- dsputil_init(&s->dsp, avctx);
- ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
- s->buffer_size = 0;
- s->buffer = NULL;
- s->start_code = -1;
- s->first_picture = 1;
- s->org_height = avctx->coded_height;
-
- build_basic_mjpeg_vlc(s);
-
- if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
- {
- av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
- init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size*8);
- if (ff_mjpeg_decode_dht(s)) {
- av_log(avctx, AV_LOG_ERROR, "mjpeg: error using external huffman table, switching back to internal\n");
- build_basic_mjpeg_vlc(s);
- }
- }
- if (avctx->extradata_size > 9 &&
- AV_RL32(avctx->extradata + 4) == MKTAG('f','i','e','l')) {
- if (avctx->extradata[9] == 6) { /* quicktime icefloe 019 */
- s->interlace_polarity = 1; /* bottom field first */
- av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
- }
- }
-
- return 0;
-}
-
-
-/* quantize tables */
-int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
-{
- int len, index, i, j;
-
- len = get_bits(&s->gb, 16) - 2;
-
- while (len >= 65) {
- /* only 8 bit precision handled */
- if (get_bits(&s->gb, 4) != 0)
- {
- av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
- return -1;
- }
- index = get_bits(&s->gb, 4);
- if (index >= 4)
- return -1;
- av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
- /* read quant table */
- for(i=0;i<64;i++) {
- j = s->scantable.permutated[i];
- s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
- }
-
- //XXX FIXME finetune, and perhaps add dc too
- s->qscale[index]= FFMAX(
- s->quant_matrixes[index][s->scantable.permutated[1]],
- s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
- av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n", index, s->qscale[index]);
- len -= 65;
- }
-
- return 0;
-}
-
-/* decode huffman tables and build VLC decoders */
-int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
-{
- int len, index, i, class, n, v, code_max;
- uint8_t bits_table[17];
- uint8_t val_table[256];
-
- len = get_bits(&s->gb, 16) - 2;
-
- while (len > 0) {
- if (len < 17)
- return -1;
- class = get_bits(&s->gb, 4);
- if (class >= 2)
- return -1;
- index = get_bits(&s->gb, 4);
- if (index >= 4)
- return -1;
- n = 0;
- for(i=1;i<=16;i++) {
- bits_table[i] = get_bits(&s->gb, 8);
- n += bits_table[i];
- }
- len -= 17;
- if (len < n || n > 256)
- return -1;
-
- code_max = 0;
- for(i=0;i<n;i++) {
- v = get_bits(&s->gb, 8);
- if (v > code_max)
- code_max = v;
- val_table[i] = v;
- }
- len -= n;
-
- /* build VLC and flush previous vlc if present */
- free_vlc(&s->vlcs[class][index]);
- av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
- class, index, code_max + 1);
- if(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1, 0, class > 0) < 0){
- return -1;
- }
- }
- return 0;
-}
-
-int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
-{
- int len, nb_components, i, width, height, pix_fmt_id;
-
- /* XXX: verify len field validity */
- len = get_bits(&s->gb, 16);
- s->bits= get_bits(&s->gb, 8);
-
- if(s->pegasus_rct) s->bits=9;
- if(s->bits==9 && !s->pegasus_rct) s->rct=1; //FIXME ugly
-
- if (s->bits != 8 && !s->lossless){
- av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
- return -1;
- }
-
- height = get_bits(&s->gb, 16);
- width = get_bits(&s->gb, 16);
-
- //HACK for odd_height.mov
- if(s->interlaced && s->width == width && s->height == height + 1)
- height= s->height;
-
- av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
- if(avcodec_check_dimensions(s->avctx, width, height))
- return -1;
-
- nb_components = get_bits(&s->gb, 8);
- if (nb_components <= 0 ||
- nb_components > MAX_COMPONENTS)
- return -1;
- if (s->ls && !(s->bits <= 8 || nb_components == 1)){
- av_log(s->avctx, AV_LOG_ERROR, "only <= 8 bits/component or 16-bit gray accepted for JPEG-LS\n");
- return -1;
- }
- s->nb_components = nb_components;
- s->h_max = 1;
- s->v_max = 1;
- for(i=0;i<nb_components;i++) {
- /* component id */
- s->component_id[i] = get_bits(&s->gb, 8) - 1;
- s->h_count[i] = get_bits(&s->gb, 4);
- s->v_count[i] = get_bits(&s->gb, 4);
- /* compute hmax and vmax (only used in interleaved case) */
- if (s->h_count[i] > s->h_max)
- s->h_max = s->h_count[i];
- if (s->v_count[i] > s->v_max)
- s->v_max = s->v_count[i];
- s->quant_index[i] = get_bits(&s->gb, 8);
- if (s->quant_index[i] >= 4)
- return -1;
- av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n", i, s->h_count[i],
- s->v_count[i], s->component_id[i], s->quant_index[i]);
- }
-
- if(s->ls && (s->h_max > 1 || s->v_max > 1)) {
- av_log(s->avctx, AV_LOG_ERROR, "Subsampling in JPEG-LS is not supported.\n");
- return -1;
- }
-
- if(s->v_max==1 && s->h_max==1 && s->lossless==1) s->rgb=1;
-
- /* if different size, realloc/alloc picture */
- /* XXX: also check h_count and v_count */
- if (width != s->width || height != s->height) {
- av_freep(&s->qscale_table);
-
- s->width = width;
- s->height = height;
- s->interlaced = 0;
-
- /* test interlaced mode */
- if (s->first_picture &&
- s->org_height != 0 &&
- s->height < ((s->org_height * 3) / 4)) {
- s->interlaced = 1;
- s->bottom_field = s->interlace_polarity;
- s->picture.interlaced_frame = 1;
- s->picture.top_field_first = !s->interlace_polarity;
- height *= 2;
- }
-
- avcodec_set_dimensions(s->avctx, width, height);
-
- s->qscale_table= av_mallocz((s->width+15)/16);
-
- s->first_picture = 0;
- }
-
- if(s->interlaced && (s->bottom_field == !s->interlace_polarity))
- return 0;
-
- /* XXX: not complete test ! */
- pix_fmt_id = (s->h_count[0] << 20) | (s->v_count[0] << 16) |
- (s->h_count[1] << 12) | (s->v_count[1] << 8) |
- (s->h_count[2] << 4) | s->v_count[2];
- av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
- switch(pix_fmt_id){
- case 0x222222:
- case 0x111111:
- if(s->rgb){
- s->avctx->pix_fmt = PIX_FMT_RGB32;
- }else if(s->nb_components==3)
- s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
- else
- s->avctx->pix_fmt = PIX_FMT_GRAY8;
- break;
- case 0x110000:
- s->avctx->pix_fmt = PIX_FMT_GRAY8;
- break;
- case 0x121111:
- s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV440P : PIX_FMT_YUVJ440P;
- break;
- case 0x211111:
- case 0x221212:
- s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
- break;
- case 0x221111:
- s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P;
- break;
- default:
- av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
- return -1;
- }
- if(s->ls){
- if(s->nb_components > 1)
- s->avctx->pix_fmt = PIX_FMT_RGB24;
- else if(s->bits <= 8)
- s->avctx->pix_fmt = PIX_FMT_GRAY8;
- else
- s->avctx->pix_fmt = PIX_FMT_GRAY16;
- }
-
- if(s->picture.data[0])
- s->avctx->release_buffer(s->avctx, &s->picture);
-
- s->picture.reference= 0;
- if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
- av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
- }
- s->picture.pict_type= I_TYPE;
- s->picture.key_frame= 1;
-
- for(i=0; i<3; i++){
- s->linesize[i]= s->picture.linesize[i] << s->interlaced;
- }
-
-// printf("%d %d %d %d %d %d\n", s->width, s->height, s->linesize[0], s->linesize[1], s->interlaced, s->avctx->height);
-
- if (len != (8+(3*nb_components)))
- {
- av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
- }
-
- /* totally blank picture as progressive JPEG will only add details to it */
- if(s->progressive){
- memset(s->picture.data[0], 0, s->picture.linesize[0] * s->height);
- memset(s->picture.data[1], 0, s->picture.linesize[1] * s->height >> (s->v_max - s->v_count[1]));
- memset(s->picture.data[2], 0, s->picture.linesize[2] * s->height >> (s->v_max - s->v_count[2]));
- }
- return 0;
-}
-
-static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
-{
- int code;
- code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
- if (code < 0)
- {
- av_log(s->avctx, AV_LOG_WARNING, "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n", 0, dc_index,
- &s->vlcs[0][dc_index]);
- return 0xffff;
- }
-
- if(code)
- return get_xbits(&s->gb, code);
- else
- return 0;
-}
-
-/* decode block and dequantize */
-static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
- int component, int dc_index, int ac_index, int16_t *quant_matrix)
-{
- int code, i, j, level, val;
-
- /* DC coef */
- val = mjpeg_decode_dc(s, dc_index);
- if (val == 0xffff) {
- av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
- return -1;
- }
- val = val * quant_matrix[0] + s->last_dc[component];
- s->last_dc[component] = val;
- block[0] = val;
- /* AC coefs */
- i = 0;
- {OPEN_READER(re, &s->gb)
- for(;;) {
- UPDATE_CACHE(re, &s->gb);
- GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
-
- /* EOB */
- if (code == 0x10)
- break;
- i += ((unsigned)code) >> 4;
- if(code != 0x100){
- 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 >= 63) {
- if(i == 63){
- j = s->scantable.permutated[63];
- block[j] = level * quant_matrix[j];
- 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];
- }
- }
- CLOSE_READER(re, &s->gb)}
-
- return 0;
-}
-
-/* decode block and dequantize - progressive JPEG version */
-static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block,
- int component, int dc_index, int ac_index, int16_t *quant_matrix,
- int ss, int se, int Ah, int Al, int *EOBRUN)
-{
- int code, i, j, level, val, run;
-
- /* DC coef */
- if(!ss){
- val = mjpeg_decode_dc(s, dc_index);
- if (val == 0xffff) {
- av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
- return -1;
- }
- 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(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= 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
-};
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-02 03:23:35 +0000