3
* Copyright (c) 2000, 2001 Fabrice Bellard
4
* Copyright (c) 2003 Alex Beregszaszi
5
* Copyright (c) 2003-2004 Michael Niedermayer
7
* Support for external huffman table, various fixes (AVID workaround),
8
* aspecting, new decode_frame mechanism and apple mjpeg-b support
11
* This file is part of Libav.
13
* Libav is free software; you can redistribute it and/or
14
* modify it under the terms of the GNU Lesser General Public
15
* License as published by the Free Software Foundation; either
16
* version 2.1 of the License, or (at your option) any later version.
18
* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
20
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21
* Lesser General Public License for more details.
23
* You should have received a copy of the GNU Lesser General Public
24
* License along with Libav; if not, write to the Free Software
25
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
36
#include "libavutil/imgutils.h"
41
#include "jpeglsdec.h"
44
static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table,
45
int nb_codes, int use_static, int is_ac)
47
uint8_t huff_size[256];
48
uint16_t huff_code[256];
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uint16_t huff_sym[256];
52
assert(nb_codes <= 256);
54
memset(huff_size, 0, sizeof(huff_size));
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ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
58
huff_sym[i]= i + 16*is_ac;
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if(is_ac) huff_sym[0]= 16*256;
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return init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2, huff_sym, 2, 2, use_static);
65
static void build_basic_mjpeg_vlc(MJpegDecodeContext * s) {
66
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);
72
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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build_vlc(&s->vlcs[2][0], ff_mjpeg_bits_ac_luminance,
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ff_mjpeg_val_ac_luminance, 251, 0, 0);
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build_vlc(&s->vlcs[2][1], ff_mjpeg_bits_ac_chrominance,
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ff_mjpeg_val_ac_chrominance, 251, 0, 0);
80
av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
82
MJpegDecodeContext *s = avctx->priv_data;
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s->picture_ptr = &s->picture;
88
dsputil_init(&s->dsp, avctx);
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ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
94
s->org_height = avctx->coded_height;
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avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
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build_basic_mjpeg_vlc(s);
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if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
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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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if (avctx->extradata_size > 9 &&
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AV_RL32(avctx->extradata + 4) == MKTAG('f','i','e','l')) {
110
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");
115
if (avctx->codec->id == CODEC_ID_AMV)
122
/* quantize tables */
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int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
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int len, index, i, j;
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len = get_bits(&s->gb, 16) - 2;
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/* only 8 bit precision handled */
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if (get_bits(&s->gb, 4) != 0)
133
av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
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index = get_bits(&s->gb, 4);
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av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
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/* read quant table */
142
j = s->scantable.permutated[i];
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s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
146
//XXX FIXME finetune, and perhaps add dc too
147
s->qscale[index]= FFMAX(
148
s->quant_matrixes[index][s->scantable.permutated[1]],
149
s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
150
av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n", index, s->qscale[index]);
157
/* decode huffman tables and build VLC decoders */
158
int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
160
int len, index, i, class, n, v, code_max;
161
uint8_t bits_table[17];
162
uint8_t val_table[256];
164
len = get_bits(&s->gb, 16) - 2;
169
class = get_bits(&s->gb, 4);
172
index = get_bits(&s->gb, 4);
177
bits_table[i] = get_bits(&s->gb, 8);
181
if (len < n || n > 256)
186
v = get_bits(&s->gb, 8);
193
/* build VLC and flush previous vlc if present */
194
free_vlc(&s->vlcs[class][index]);
195
av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
196
class, index, code_max + 1);
197
if(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1, 0, class > 0) < 0){
202
free_vlc(&s->vlcs[2][index]);
203
if(build_vlc(&s->vlcs[2][index], bits_table, val_table, code_max + 1, 0, 0) < 0){
211
int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
213
int len, nb_components, i, width, height, pix_fmt_id;
215
/* XXX: verify len field validity */
216
len = get_bits(&s->gb, 16);
217
s->bits= get_bits(&s->gb, 8);
219
if(s->pegasus_rct) s->bits=9;
220
if(s->bits==9 && !s->pegasus_rct) s->rct=1; //FIXME ugly
222
if (s->bits != 8 && !s->lossless){
223
av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
227
height = get_bits(&s->gb, 16);
228
width = get_bits(&s->gb, 16);
230
//HACK for odd_height.mov
231
if(s->interlaced && s->width == width && s->height == height + 1)
234
av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
235
if(av_image_check_size(width, height, 0, s->avctx))
238
nb_components = get_bits(&s->gb, 8);
239
if (nb_components <= 0 ||
240
nb_components > MAX_COMPONENTS)
242
if (s->ls && !(s->bits <= 8 || nb_components == 1)){
243
av_log(s->avctx, AV_LOG_ERROR, "only <= 8 bits/component or 16-bit gray accepted for JPEG-LS\n");
246
s->nb_components = nb_components;
249
for(i=0;i<nb_components;i++) {
251
s->component_id[i] = get_bits(&s->gb, 8) - 1;
252
s->h_count[i] = get_bits(&s->gb, 4);
253
s->v_count[i] = get_bits(&s->gb, 4);
254
/* compute hmax and vmax (only used in interleaved case) */
255
if (s->h_count[i] > s->h_max)
256
s->h_max = s->h_count[i];
257
if (s->v_count[i] > s->v_max)
258
s->v_max = s->v_count[i];
259
s->quant_index[i] = get_bits(&s->gb, 8);
260
if (s->quant_index[i] >= 4)
262
av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n", i, s->h_count[i],
263
s->v_count[i], s->component_id[i], s->quant_index[i]);
266
if(s->ls && (s->h_max > 1 || s->v_max > 1)) {
267
av_log(s->avctx, AV_LOG_ERROR, "Subsampling in JPEG-LS is not supported.\n");
271
if(s->v_max==1 && s->h_max==1 && s->lossless==1) s->rgb=1;
273
/* if different size, realloc/alloc picture */
274
/* XXX: also check h_count and v_count */
275
if (width != s->width || height != s->height) {
276
av_freep(&s->qscale_table);
282
/* test interlaced mode */
283
if (s->first_picture &&
284
s->org_height != 0 &&
285
s->height < ((s->org_height * 3) / 4)) {
287
s->bottom_field = s->interlace_polarity;
288
s->picture_ptr->interlaced_frame = 1;
289
s->picture_ptr->top_field_first = !s->interlace_polarity;
293
avcodec_set_dimensions(s->avctx, width, height);
295
s->qscale_table= av_mallocz((s->width+15)/16);
297
s->first_picture = 0;
300
if(s->interlaced && (s->bottom_field == !s->interlace_polarity))
303
/* XXX: not complete test ! */
304
pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
305
(s->h_count[1] << 20) | (s->v_count[1] << 16) |
306
(s->h_count[2] << 12) | (s->v_count[2] << 8) |
307
(s->h_count[3] << 4) | s->v_count[3];
308
av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
309
//NOTE we do not allocate pictures large enough for the possible padding of h/v_count being 4
310
if(!(pix_fmt_id & 0xD0D0D0D0))
311
pix_fmt_id-= (pix_fmt_id & 0xF0F0F0F0)>>1;
312
if(!(pix_fmt_id & 0x0D0D0D0D))
313
pix_fmt_id-= (pix_fmt_id & 0x0F0F0F0F)>>1;
318
s->avctx->pix_fmt = PIX_FMT_BGRA;
320
s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
321
assert(s->nb_components==3);
324
s->avctx->pix_fmt = PIX_FMT_GRAY8;
327
s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV440P : PIX_FMT_YUVJ440P;
330
s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
333
s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P;
336
av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
340
if(s->nb_components > 1)
341
s->avctx->pix_fmt = PIX_FMT_RGB24;
342
else if(s->bits <= 8)
343
s->avctx->pix_fmt = PIX_FMT_GRAY8;
345
s->avctx->pix_fmt = PIX_FMT_GRAY16;
348
if(s->picture_ptr->data[0])
349
s->avctx->release_buffer(s->avctx, s->picture_ptr);
351
if(s->avctx->get_buffer(s->avctx, s->picture_ptr) < 0){
352
av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
355
s->picture_ptr->pict_type= AV_PICTURE_TYPE_I;
356
s->picture_ptr->key_frame= 1;
360
s->linesize[i]= s->picture_ptr->linesize[i] << s->interlaced;
363
// printf("%d %d %d %d %d %d\n", s->width, s->height, s->linesize[0], s->linesize[1], s->interlaced, s->avctx->height);
365
if (len != (8+(3*nb_components)))
367
av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
370
/* totally blank picture as progressive JPEG will only add details to it */
372
int bw = (width + s->h_max*8-1) / (s->h_max*8);
373
int bh = (height + s->v_max*8-1) / (s->v_max*8);
374
for(i=0; i<s->nb_components; i++) {
375
int size = bw * bh * s->h_count[i] * s->v_count[i];
376
av_freep(&s->blocks[i]);
377
av_freep(&s->last_nnz[i]);
378
s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
379
s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
380
s->block_stride[i] = bw * s->h_count[i];
382
memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
387
static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
390
code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
393
av_log(s->avctx, AV_LOG_WARNING, "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n", 0, dc_index,
394
&s->vlcs[0][dc_index]);
399
return get_xbits(&s->gb, code);
404
/* decode block and dequantize */
405
static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
406
int component, int dc_index, int ac_index, int16_t *quant_matrix)
408
int code, i, j, level, val;
411
val = mjpeg_decode_dc(s, dc_index);
413
av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
416
val = val * quant_matrix[0] + s->last_dc[component];
417
s->last_dc[component] = val;
421
{OPEN_READER(re, &s->gb);
423
UPDATE_CACHE(re, &s->gb);
424
GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
426
i += ((unsigned)code) >> 4;
429
if(code > MIN_CACHE_BITS - 16){
430
UPDATE_CACHE(re, &s->gb);
433
int cache=GET_CACHE(re,&s->gb);
434
int sign=(~cache)>>31;
435
level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
438
LAST_SKIP_BITS(re, &s->gb, code);
441
av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
444
j = s->scantable.permutated[i];
445
block[j] = level * quant_matrix[j];
448
CLOSE_READER(re, &s->gb);}
453
static int decode_dc_progressive(MJpegDecodeContext *s, DCTELEM *block, int component,
454
int dc_index, int16_t *quant_matrix, int Al)
457
s->dsp.clear_block(block);
458
val = mjpeg_decode_dc(s, dc_index);
460
av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
463
val = (val * quant_matrix[0] << Al) + s->last_dc[component];
464
s->last_dc[component] = val;
469
/* decode block and dequantize - progressive JPEG version */
470
static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz,
471
int ac_index, int16_t *quant_matrix,
472
int ss, int se, int Al, int *EOBRUN)
474
int code, i, j, level, val, run;
480
{OPEN_READER(re, &s->gb);
482
UPDATE_CACHE(re, &s->gb);
483
GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
485
run = ((unsigned) code) >> 4;
489
if(code > MIN_CACHE_BITS - 16){
490
UPDATE_CACHE(re, &s->gb);
493
int cache=GET_CACHE(re,&s->gb);
494
int sign=(~cache)>>31;
495
level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
498
LAST_SKIP_BITS(re, &s->gb, code);
502
j = s->scantable.permutated[se];
503
block[j] = level * quant_matrix[j] << Al;
506
av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
509
j = s->scantable.permutated[i];
510
block[j] = level * quant_matrix[j] << Al;
512
if(run == 0xF){// ZRL - skip 15 coefficients
515
av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
521
UPDATE_CACHE(re, &s->gb);
522
val += NEG_USR32(GET_CACHE(re, &s->gb), run);
523
LAST_SKIP_BITS(re, &s->gb, run);
530
CLOSE_READER(re, &s->gb);}
536
#define REFINE_BIT(j) {\
537
UPDATE_CACHE(re, &s->gb);\
538
sign = block[j]>>15;\
539
block[j] += SHOW_UBITS(re, &s->gb, 1) * ((quant_matrix[j]^sign)-sign) << Al;\
540
LAST_SKIP_BITS(re, &s->gb, 1);\
548
av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);\
553
j = s->scantable.permutated[i];\
560
/* decode block and dequantize - progressive JPEG refinement pass */
561
static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz,
562
int ac_index, int16_t *quant_matrix,
563
int ss, int se, int Al, int *EOBRUN)
565
int code, i=ss, j, sign, val, run;
566
int last = FFMIN(se, *last_nnz);
568
OPEN_READER(re, &s->gb);
573
UPDATE_CACHE(re, &s->gb);
574
GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
577
run = ((unsigned) code) >> 4;
578
UPDATE_CACHE(re, &s->gb);
579
val = SHOW_UBITS(re, &s->gb, 1);
580
LAST_SKIP_BITS(re, &s->gb, 1);
582
j = s->scantable.permutated[i];
584
block[j] = ((quant_matrix[j]^val)-val) << Al;
588
CLOSE_READER(re, &s->gb);
592
run = ((unsigned) code) >> 4;
599
UPDATE_CACHE(re, &s->gb);
600
run += SHOW_UBITS(re, &s->gb, val);
601
LAST_SKIP_BITS(re, &s->gb, val);
614
j = s->scantable.permutated[i];
618
CLOSE_READER(re, &s->gb);
625
static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){
627
uint16_t (*buffer)[4];
628
int left[3], top[3], topleft[3];
629
const int linesize= s->linesize[0];
630
const int mask= (1<<s->bits)-1;
632
av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size, (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
633
buffer= s->ljpeg_buffer;
636
buffer[0][i]= 1 << (s->bits + point_transform - 1);
638
for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
639
const int modified_predictor= mb_y ? predictor : 1;
640
uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
642
if (s->interlaced && s->bottom_field)
643
ptr += linesize >> 1;
646
top[i]= left[i]= topleft[i]= buffer[0][i];
648
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
649
if (s->restart_interval && !s->restart_count)
650
s->restart_count = s->restart_interval;
656
top[i]= buffer[mb_x][i];
658
PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
661
buffer[mb_x][i]= mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
664
if (s->restart_interval && !--s->restart_count) {
665
align_get_bits(&s->gb);
666
skip_bits(&s->gb, 16); /* skip RSTn */
671
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
672
ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200)>>2);
673
ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
674
ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
676
}else if(s->pegasus_rct){
677
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
678
ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2])>>2);
679
ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
680
ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
683
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
684
ptr[4*mb_x+0] = buffer[mb_x][2];
685
ptr[4*mb_x+1] = buffer[mb_x][1];
686
ptr[4*mb_x+2] = buffer[mb_x][0];
693
static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point_transform){
695
const int nb_components=3;
697
for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
698
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
699
if (s->restart_interval && !s->restart_count)
700
s->restart_count = s->restart_interval;
702
if(mb_x==0 || mb_y==0 || s->interlaced){
703
for(i=0;i<nb_components;i++) {
705
int n, h, v, x, y, c, j, linesize;
707
c = s->comp_index[i];
712
linesize= s->linesize[c];
717
ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
720
pred= 128 << point_transform;
726
pred= ptr[-linesize];
728
PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
732
if (s->interlaced && s->bottom_field)
733
ptr += linesize >> 1;
734
*ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
743
for(i=0;i<nb_components;i++) {
745
int n, h, v, x, y, c, j, linesize;
747
c = s->comp_index[i];
752
linesize= s->linesize[c];
757
ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
758
PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
759
*ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
767
if (s->restart_interval && !--s->restart_count) {
768
align_get_bits(&s->gb);
769
skip_bits(&s->gb, 16); /* skip RSTn */
776
static av_always_inline void mjpeg_copy_block(uint8_t *dst, const uint8_t *src,
777
int linesize, int lowres)
780
case 0: copy_block8(dst, src, linesize, linesize, 8);
782
case 1: copy_block4(dst, src, linesize, linesize, 4);
784
case 2: copy_block2(dst, src, linesize, linesize, 2);
791
static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah, int Al,
792
const uint8_t *mb_bitmask, const AVFrame *reference){
794
uint8_t* data[MAX_COMPONENTS];
795
const uint8_t *reference_data[MAX_COMPONENTS];
796
int linesize[MAX_COMPONENTS];
797
GetBitContext mb_bitmask_gb;
800
init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width*s->mb_height);
803
if(s->flipped && s->avctx->flags & CODEC_FLAG_EMU_EDGE) {
804
av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with CODEC_FLAG_EMU_EDGE set!\n");
807
for(i=0; i < nb_components; i++) {
808
int c = s->comp_index[i];
809
data[c] = s->picture_ptr->data[c];
810
reference_data[c] = reference ? reference->data[c] : NULL;
811
linesize[c]=s->linesize[c];
812
s->coefs_finished[c] |= 1;
814
//picture should be flipped upside-down for this codec
815
int offset = (linesize[c] * (s->v_scount[i] * (8 * s->mb_height -((s->height/s->v_max)&7)) - 1 ));
817
reference_data[c] += offset;
822
for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
823
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
824
const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
826
if (s->restart_interval && !s->restart_count)
827
s->restart_count = s->restart_interval;
829
if(get_bits_count(&s->gb)>s->gb.size_in_bits){
830
av_log(s->avctx, AV_LOG_ERROR, "overread %d\n", get_bits_count(&s->gb) - s->gb.size_in_bits);
833
for(i=0;i<nb_components;i++) {
835
int n, h, v, x, y, c, j;
838
c = s->comp_index[i];
844
block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
845
(h * mb_x + x) * 8) >> s->avctx->lowres);
847
if(s->interlaced && s->bottom_field)
848
block_offset += linesize[c] >> 1;
849
ptr = data[c] + block_offset;
850
if(!s->progressive) {
852
mjpeg_copy_block(ptr, reference_data[c] + block_offset, linesize[c], s->avctx->lowres);
854
s->dsp.clear_block(s->block);
855
if(decode_block(s, s->block, i,
856
s->dc_index[i], s->ac_index[i],
857
s->quant_matrixes[ s->quant_index[c] ]) < 0) {
858
av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
861
s->dsp.idct_put(ptr, linesize[c], s->block);
864
int block_idx = s->block_stride[c] * (v * mb_y + y) + (h * mb_x + x);
865
DCTELEM *block = s->blocks[c][block_idx];
867
block[0] += get_bits1(&s->gb) * s->quant_matrixes[ s->quant_index[c] ][0] << Al;
868
else if(decode_dc_progressive(s, block, i, s->dc_index[i], s->quant_matrixes[ s->quant_index[c] ], Al) < 0) {
869
av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
873
// av_log(s->avctx, AV_LOG_DEBUG, "mb: %d %d processed\n", mb_y, mb_x);
874
//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);
882
if (s->restart_interval && !--s->restart_count) {
883
align_get_bits(&s->gb);
884
skip_bits(&s->gb, 16); /* skip RSTn */
885
for (i=0; i<nb_components; i++) /* reset dc */
886
s->last_dc[i] = 1024;
893
static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss, int se, int Ah, int Al,
894
const uint8_t *mb_bitmask, const AVFrame *reference){
897
int c = s->comp_index[0];
898
uint8_t* data = s->picture_ptr->data[c];
899
const uint8_t *reference_data = reference ? reference->data[c] : NULL;
900
int linesize = s->linesize[c];
902
int16_t *quant_matrix = s->quant_matrixes[ s->quant_index[c] ];
903
GetBitContext mb_bitmask_gb;
906
init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width*s->mb_height);
910
s->coefs_finished[c] |= (1LL<<(se+1))-(1LL<<ss);
911
last_scan = !~s->coefs_finished[c];
914
if(s->interlaced && s->bottom_field) {
915
int offset = linesize >> 1;
917
reference_data += offset;
920
for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
921
int block_offset = (mb_y*linesize*8 >> s->avctx->lowres);
922
uint8_t *ptr = data + block_offset;
923
int block_idx = mb_y * s->block_stride[c];
924
DCTELEM (*block)[64] = &s->blocks[c][block_idx];
925
uint8_t *last_nnz = &s->last_nnz[c][block_idx];
926
for(mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
927
const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
932
ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
933
quant_matrix, ss, se, Al, &EOBRUN);
935
ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
936
quant_matrix, ss, se, Al, &EOBRUN);
938
av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
945
mjpeg_copy_block(ptr, reference_data + block_offset, linesize, s->avctx->lowres);
947
s->dsp.idct_put(ptr, linesize, *block);
948
ptr += 8 >> s->avctx->lowres;
956
int ff_mjpeg_decode_sos(MJpegDecodeContext *s,
957
const uint8_t *mb_bitmask, const AVFrame *reference)
959
int len, nb_components, i, h, v, predictor, point_transform;
961
const int block_size= s->lossless ? 1 : 8;
964
/* XXX: verify len field validity */
965
len = get_bits(&s->gb, 16);
966
nb_components = get_bits(&s->gb, 8);
967
if (nb_components == 0 || nb_components > MAX_COMPONENTS){
968
av_log(s->avctx, AV_LOG_ERROR, "decode_sos: nb_components (%d) unsupported\n", nb_components);
971
if (len != 6+2*nb_components)
973
av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
976
for(i=0;i<nb_components;i++) {
977
id = get_bits(&s->gb, 8) - 1;
978
av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
979
/* find component index */
980
for(index=0;index<s->nb_components;index++)
981
if (id == s->component_id[index])
983
if (index == s->nb_components)
985
av_log(s->avctx, AV_LOG_ERROR, "decode_sos: index(%d) out of components\n", index);
988
/* Metasoft MJPEG codec has Cb and Cr swapped */
989
if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
990
&& nb_components == 3 && s->nb_components == 3 && i)
993
s->comp_index[i] = index;
995
s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
996
s->h_scount[i] = s->h_count[index];
997
s->v_scount[i] = s->v_count[index];
999
s->dc_index[i] = get_bits(&s->gb, 4);
1000
s->ac_index[i] = get_bits(&s->gb, 4);
1002
if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1003
s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1005
if (!s->vlcs[0][s->dc_index[i]].table || !s->vlcs[1][s->ac_index[i]].table)
1009
predictor= get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1010
ilv= get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1011
prev_shift = get_bits(&s->gb, 4); /* Ah */
1012
point_transform= get_bits(&s->gb, 4); /* Al */
1014
for(i=0;i<nb_components;i++)
1015
s->last_dc[i] = 1024;
1017
if (nb_components > 1) {
1018
/* interleaved stream */
1019
s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1020
s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1021
} else if(!s->ls) { /* skip this for JPEG-LS */
1022
h = s->h_max / s->h_scount[0];
1023
v = s->v_max / s->v_scount[0];
1024
s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1025
s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1026
s->nb_blocks[0] = 1;
1031
if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1032
av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n", s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1033
predictor, point_transform, ilv, s->bits,
1034
s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
1037
/* mjpeg-b can have padding bytes between sos and image data, skip them */
1038
for (i = s->mjpb_skiptosod; i > 0; i--)
1039
skip_bits(&s->gb, 8);
1042
if(CONFIG_JPEGLS_DECODER && s->ls){
1044
// reset_ls_coding_parameters(s, 0);
1046
if(ff_jpegls_decode_picture(s, predictor, point_transform, ilv) < 0)
1050
if(ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)
1053
if(ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0)
1058
if(s->progressive && predictor) {
1059
if(mjpeg_decode_scan_progressive_ac(s, predictor, ilv, prev_shift, point_transform,
1060
mb_bitmask, reference) < 0)
1063
if(mjpeg_decode_scan(s, nb_components, prev_shift, point_transform,
1064
mb_bitmask, reference) < 0)
1071
av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1075
static int mjpeg_decode_dri(MJpegDecodeContext *s)
1077
if (get_bits(&s->gb, 16) != 4)
1079
s->restart_interval = get_bits(&s->gb, 16);
1080
s->restart_count = 0;
1081
av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n", s->restart_interval);
1086
static int mjpeg_decode_app(MJpegDecodeContext *s)
1090
len = get_bits(&s->gb, 16);
1093
if(8*len + get_bits_count(&s->gb) > s->gb.size_in_bits)
1096
id = get_bits_long(&s->gb, 32);
1097
id = av_be2ne32(id);
1100
if(s->avctx->debug & FF_DEBUG_STARTCODE){
1101
av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1104
/* buggy AVID, it puts EOI only at every 10th frame */
1105
/* also this fourcc is used by non-avid files too, it holds some
1106
informations, but it's always present in AVID creates files */
1107
if (id == AV_RL32("AVI1"))
1114
4bytes field_size_less_padding
1117
// if (s->first_picture)
1118
// printf("mjpeg: workarounding buggy AVID\n");
1119
i = get_bits(&s->gb, 8);
1120
if (i==2) s->bottom_field= 1;
1121
else if(i==1) s->bottom_field= 0;
1123
skip_bits(&s->gb, 8);
1124
skip_bits(&s->gb, 32);
1125
skip_bits(&s->gb, 32);
1128
// if (s->interlace_polarity)
1129
// printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
1135
if (id == AV_RL32("JFIF"))
1137
int t_w, t_h, v1, v2;
1138
skip_bits(&s->gb, 8); /* the trailing zero-byte */
1139
v1= get_bits(&s->gb, 8);
1140
v2= get_bits(&s->gb, 8);
1141
skip_bits(&s->gb, 8);
1143
s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 16);
1144
s->avctx->sample_aspect_ratio.den= get_bits(&s->gb, 16);
1146
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1147
av_log(s->avctx, AV_LOG_INFO, "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1149
s->avctx->sample_aspect_ratio.num,
1150
s->avctx->sample_aspect_ratio.den
1153
t_w = get_bits(&s->gb, 8);
1154
t_h = get_bits(&s->gb, 8);
1157
/* skip thumbnail */
1158
if (len-10-(t_w*t_h*3) > 0)
1165
if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e'))
1167
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1168
av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1169
skip_bits(&s->gb, 16); /* version */
1170
skip_bits(&s->gb, 16); /* flags0 */
1171
skip_bits(&s->gb, 16); /* flags1 */
1172
skip_bits(&s->gb, 8); /* transform */
1177
if (id == AV_RL32("LJIF")){
1178
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1179
av_log(s->avctx, AV_LOG_INFO, "Pegasus lossless jpeg header found\n");
1180
skip_bits(&s->gb, 16); /* version ? */
1181
skip_bits(&s->gb, 16); /* unknwon always 0? */
1182
skip_bits(&s->gb, 16); /* unknwon always 0? */
1183
skip_bits(&s->gb, 16); /* unknwon always 0? */
1184
switch( get_bits(&s->gb, 8)){
1194
av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1201
if ((s->start_code == APP1) && (len > (0x28 - 8)))
1203
id = get_bits_long(&s->gb, 32);
1204
id = av_be2ne32(id);
1206
if (id == AV_RL32("mjpg")) /* Apple MJPEG-A */
1209
skip_bits(&s->gb, 32); /* field size */
1210
skip_bits(&s->gb, 32); /* pad field size */
1211
skip_bits(&s->gb, 32); /* next off */
1212
skip_bits(&s->gb, 32); /* quant off */
1213
skip_bits(&s->gb, 32); /* huff off */
1214
skip_bits(&s->gb, 32); /* image off */
1215
skip_bits(&s->gb, 32); /* scan off */
1216
skip_bits(&s->gb, 32); /* data off */
1218
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1219
av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1224
/* slow but needed for extreme adobe jpegs */
1226
av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error, decode_app parser read over the end\n");
1228
skip_bits(&s->gb, 8);
1233
static int mjpeg_decode_com(MJpegDecodeContext *s)
1235
int len = get_bits(&s->gb, 16);
1236
if (len >= 2 && 8*len - 16 + get_bits_count(&s->gb) <= s->gb.size_in_bits) {
1237
char *cbuf = av_malloc(len - 1);
1240
for (i = 0; i < len - 2; i++)
1241
cbuf[i] = get_bits(&s->gb, 8);
1242
if (i > 0 && cbuf[i-1] == '\n')
1247
if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1248
av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1250
/* buggy avid, it puts EOI only at every 10th frame */
1251
if (!strcmp(cbuf, "AVID"))
1254
// if (s->first_picture)
1255
// printf("mjpeg: workarounding buggy AVID\n");
1257
else if(!strcmp(cbuf, "CS=ITU601")){
1260
else if((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
1261
(len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20))){
1273
static int valid_marker_list[] =
1275
/* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f */
1276
/* 0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1277
/* 1 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1278
/* 2 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1279
/* 3 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1280
/* 4 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1281
/* 5 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1282
/* 6 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1283
/* 7 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1284
/* 8 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1285
/* 9 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1286
/* a */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1287
/* b */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1288
/* c */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1289
/* d */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1290
/* e */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1291
/* f */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
1295
/* return the 8 bit start code value and update the search
1296
state. Return -1 if no start code found */
1297
static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1299
const uint8_t *buf_ptr;
1306
buf_ptr = *pbuf_ptr;
1307
while (buf_ptr < buf_end) {
1310
if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1320
av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1321
*pbuf_ptr = buf_ptr;
1325
int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1326
const uint8_t **buf_ptr, const uint8_t *buf_end,
1327
const uint8_t **unescaped_buf_ptr, int *unescaped_buf_size)
1330
start_code = find_marker(buf_ptr, buf_end);
1332
if ((buf_end - *buf_ptr) > s->buffer_size)
1335
s->buffer_size = buf_end - *buf_ptr;
1336
s->buffer = av_malloc(s->buffer_size + FF_INPUT_BUFFER_PADDING_SIZE);
1337
av_log(s->avctx, AV_LOG_DEBUG, "buffer too small, expanding to %d bytes\n",
1341
/* unescape buffer of SOS, use special treatment for JPEG-LS */
1342
if (start_code == SOS && !s->ls)
1344
const uint8_t *src = *buf_ptr;
1345
uint8_t *dst = s->buffer;
1349
uint8_t x = *(src++);
1352
if (s->avctx->codec_id != CODEC_ID_THP)
1355
while (src < buf_end && x == 0xff)
1358
if (x >= 0xd0 && x <= 0xd7)
1365
*unescaped_buf_ptr = s->buffer;
1366
*unescaped_buf_size = dst - s->buffer;
1368
av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1369
(buf_end - *buf_ptr) - (dst - s->buffer));
1371
else if(start_code == SOS && s->ls){
1372
const uint8_t *src = *buf_ptr;
1373
uint8_t *dst = s->buffer;
1381
while (src + t < buf_end){
1382
uint8_t x = src[t++];
1384
while((src + t < buf_end) && x == 0xff)
1394
init_put_bits(&pb, dst, t);
1396
/* unescape bitstream */
1398
uint8_t x = src[b++];
1399
put_bits(&pb, 8, x);
1402
put_bits(&pb, 7, x);
1406
flush_put_bits(&pb);
1408
*unescaped_buf_ptr = dst;
1409
*unescaped_buf_size = (bit_count + 7) >> 3;
1413
*unescaped_buf_ptr = *buf_ptr;
1414
*unescaped_buf_size = buf_end - *buf_ptr;
1420
int ff_mjpeg_decode_frame(AVCodecContext *avctx,
1421
void *data, int *data_size,
1424
const uint8_t *buf = avpkt->data;
1425
int buf_size = avpkt->size;
1426
MJpegDecodeContext *s = avctx->priv_data;
1427
const uint8_t *buf_end, *buf_ptr;
1428
const uint8_t *unescaped_buf_ptr;
1429
int unescaped_buf_size;
1431
AVFrame *picture = data;
1433
s->got_picture = 0; // picture from previous image can not be reused
1435
buf_end = buf + buf_size;
1436
while (buf_ptr < buf_end) {
1437
/* find start next marker */
1438
start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1439
&unescaped_buf_ptr, &unescaped_buf_size);
1442
if (start_code < 0) {
1445
av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n", start_code, buf_end - buf_ptr);
1447
init_get_bits(&s->gb, unescaped_buf_ptr, unescaped_buf_size*8);
1449
s->start_code = start_code;
1450
if(s->avctx->debug & FF_DEBUG_STARTCODE){
1451
av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1454
/* process markers */
1455
if (start_code >= 0xd0 && start_code <= 0xd7) {
1456
av_log(avctx, AV_LOG_DEBUG, "restart marker: %d\n", start_code&0x0f);
1458
} else if (start_code >= APP0 && start_code <= APP15) {
1459
mjpeg_decode_app(s);
1461
} else if (start_code == COM){
1462
mjpeg_decode_com(s);
1465
switch(start_code) {
1467
s->restart_interval = 0;
1469
s->restart_count = 0;
1470
/* nothing to do on SOI */
1473
ff_mjpeg_decode_dqt(s);
1476
if(ff_mjpeg_decode_dht(s) < 0){
1477
av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1486
if (ff_mjpeg_decode_sof(s) < 0)
1493
if (ff_mjpeg_decode_sof(s) < 0)
1500
if (ff_mjpeg_decode_sof(s) < 0)
1507
if (ff_mjpeg_decode_sof(s) < 0)
1511
if (!CONFIG_JPEGLS_DECODER || ff_jpegls_decode_lse(s) < 0)
1516
if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1519
if (!s->got_picture) {
1520
av_log(avctx, AV_LOG_WARNING, "Found EOI before any SOF, ignoring\n");
1524
if (s->interlaced) {
1525
s->bottom_field ^= 1;
1526
/* if not bottom field, do not output image yet */
1527
if (s->bottom_field == !s->interlace_polarity)
1530
*picture = *s->picture_ptr;
1531
*data_size = sizeof(AVFrame);
1534
picture->quality= FFMAX3(s->qscale[0], s->qscale[1], s->qscale[2]);
1535
picture->qstride= 0;
1536
picture->qscale_table= s->qscale_table;
1537
memset(picture->qscale_table, picture->quality, (s->width+15)/16);
1538
if(avctx->debug & FF_DEBUG_QP)
1539
av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
1540
picture->quality*= FF_QP2LAMBDA;
1547
if (!s->got_picture) {
1548
av_log(avctx, AV_LOG_WARNING, "Can not process SOS before SOF, skipping\n");
1551
ff_mjpeg_decode_sos(s, NULL, NULL);
1552
/* buggy avid puts EOI every 10-20th frame */
1553
/* if restart period is over process EOI */
1554
if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1558
mjpeg_decode_dri(s);
1570
av_log(avctx, AV_LOG_ERROR, "mjpeg: unsupported coding type (%x)\n", start_code);
1573
// printf("mjpeg: unsupported marker (%x)\n", start_code);
1578
/* eof process start code */
1579
buf_ptr += (get_bits_count(&s->gb)+7)/8;
1580
av_log(avctx, AV_LOG_DEBUG, "marker parser used %d bytes (%d bits)\n",
1581
(get_bits_count(&s->gb)+7)/8, get_bits_count(&s->gb));
1585
if (s->got_picture) {
1586
av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1589
av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1592
av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n", buf_end - buf_ptr);
1593
// return buf_end - buf_ptr;
1594
return buf_ptr - buf;
1597
av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1599
MJpegDecodeContext *s = avctx->priv_data;
1602
if (s->picture_ptr && s->picture_ptr->data[0])
1603
avctx->release_buffer(avctx, s->picture_ptr);
1606
av_free(s->qscale_table);
1607
av_freep(&s->ljpeg_buffer);
1608
s->ljpeg_buffer_size=0;
1612
free_vlc(&s->vlcs[i][j]);
1614
for(i=0; i<MAX_COMPONENTS; i++) {
1615
av_freep(&s->blocks[i]);
1616
av_freep(&s->last_nnz[i]);
1621
AVCodec ff_mjpeg_decoder = {
1625
sizeof(MJpegDecodeContext),
1626
ff_mjpeg_decode_init,
1628
ff_mjpeg_decode_end,
1629
ff_mjpeg_decode_frame,
1633
.long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1636
AVCodec ff_thp_decoder = {
1640
sizeof(MJpegDecodeContext),
1641
ff_mjpeg_decode_init,
1643
ff_mjpeg_decode_end,
1644
ff_mjpeg_decode_frame,
1648
.long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
added
removed
.pc/post-0.7.1/0002-jpegdec-actually-search-for-and-parse-RSTn.patch/libavcodec/mjpegdec.c
