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,
19 * 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"
37 #include "libavutil/opt.h"
42 #include "jpeglsdec.h"
45 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
46 const uint8_t *val_table, int nb_codes,
47 int use_static, int is_ac)
49 uint8_t huff_size[256];
50 uint16_t huff_code[256];
51 uint16_t huff_sym[256];
54 assert(nb_codes <= 256);
56 memset(huff_size, 0, sizeof(huff_size));
57 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
59 for (i = 0; i < 256; i++)
60 huff_sym[i] = i + 16 * is_ac;
63 huff_sym[0] = 16 * 256;
65 return init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
66 huff_code, 2, 2, huff_sym, 2, 2, use_static);
69 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
71 build_vlc(&s->vlcs[0][0], ff_mjpeg_bits_dc_luminance,
72 ff_mjpeg_val_dc, 12, 0, 0);
73 build_vlc(&s->vlcs[0][1], ff_mjpeg_bits_dc_chrominance,
74 ff_mjpeg_val_dc, 12, 0, 0);
75 build_vlc(&s->vlcs[1][0], ff_mjpeg_bits_ac_luminance,
76 ff_mjpeg_val_ac_luminance, 251, 0, 1);
77 build_vlc(&s->vlcs[1][1], ff_mjpeg_bits_ac_chrominance,
78 ff_mjpeg_val_ac_chrominance, 251, 0, 1);
79 build_vlc(&s->vlcs[2][0], ff_mjpeg_bits_ac_luminance,
80 ff_mjpeg_val_ac_luminance, 251, 0, 0);
81 build_vlc(&s->vlcs[2][1], ff_mjpeg_bits_ac_chrominance,
82 ff_mjpeg_val_ac_chrominance, 251, 0, 0);
85 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
87 MJpegDecodeContext *s = avctx->priv_data;
90 s->picture_ptr = &s->picture;
93 dsputil_init(&s->dsp, avctx);
94 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
99 s->org_height = avctx->coded_height;
100 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
102 build_basic_mjpeg_vlc(s);
104 #if FF_API_MJPEG_GLOBAL_OPTS
105 if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
108 if (s->extern_huff) {
109 av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
110 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
111 if (ff_mjpeg_decode_dht(s)) {
112 av_log(avctx, AV_LOG_ERROR,
113 "mjpeg: error using external huffman table\n");
114 return AVERROR_INVALIDDATA;
117 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
118 s->interlace_polarity = 1; /* bottom field first */
119 av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
121 if (avctx->codec->id == CODEC_ID_AMV)
128 /* quantize tables */
129 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
131 int len, index, i, j;
133 len = get_bits(&s->gb, 16) - 2;
136 /* only 8 bit precision handled */
137 if (get_bits(&s->gb, 4) != 0) {
138 av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
141 index = get_bits(&s->gb, 4);
144 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
145 /* read quant table */
146 for (i = 0; i < 64; i++) {
147 j = s->scantable.permutated[i];
148 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
151 // XXX FIXME finetune, and perhaps add dc too
152 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
153 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
154 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
155 index, s->qscale[index]);
161 /* decode huffman tables and build VLC decoders */
162 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
164 int len, index, i, class, n, v, code_max;
165 uint8_t bits_table[17];
166 uint8_t val_table[256];
168 len = get_bits(&s->gb, 16) - 2;
173 class = get_bits(&s->gb, 4);
176 index = get_bits(&s->gb, 4);
180 for (i = 1; i <= 16; i++) {
181 bits_table[i] = get_bits(&s->gb, 8);
185 if (len < n || n > 256)
189 for (i = 0; i < n; i++) {
190 v = get_bits(&s->gb, 8);
197 /* build VLC and flush previous vlc if present */
198 free_vlc(&s->vlcs[class][index]);
199 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
200 class, index, code_max + 1);
201 if (build_vlc(&s->vlcs[class][index], bits_table, val_table,
202 code_max + 1, 0, class > 0) < 0)
206 free_vlc(&s->vlcs[2][index]);
207 if (build_vlc(&s->vlcs[2][index], bits_table, val_table,
208 code_max + 1, 0, 0) < 0)
215 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
217 int len, nb_components, i, width, height, pix_fmt_id;
219 /* XXX: verify len field validity */
220 len = get_bits(&s->gb, 16);
221 s->bits = get_bits(&s->gb, 8);
225 if (s->bits == 9 && !s->pegasus_rct)
226 s->rct = 1; // FIXME ugly
228 if (s->bits != 8 && !s->lossless) {
229 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
233 height = get_bits(&s->gb, 16);
234 width = get_bits(&s->gb, 16);
236 // HACK for odd_height.mov
237 if (s->interlaced && s->width == width && s->height == height + 1)
240 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
241 if (av_image_check_size(width, height, 0, s->avctx))
244 nb_components = get_bits(&s->gb, 8);
245 if (nb_components <= 0 ||
246 nb_components > MAX_COMPONENTS)
248 if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
249 av_log(s->avctx, AV_LOG_ERROR,
250 "only <= 8 bits/component or 16-bit gray accepted for JPEG-LS\n");
253 s->nb_components = nb_components;
256 for (i = 0; i < nb_components; i++) {
258 s->component_id[i] = get_bits(&s->gb, 8) - 1;
259 s->h_count[i] = get_bits(&s->gb, 4);
260 s->v_count[i] = get_bits(&s->gb, 4);
261 /* compute hmax and vmax (only used in interleaved case) */
262 if (s->h_count[i] > s->h_max)
263 s->h_max = s->h_count[i];
264 if (s->v_count[i] > s->v_max)
265 s->v_max = s->v_count[i];
266 s->quant_index[i] = get_bits(&s->gb, 8);
267 if (s->quant_index[i] >= 4)
269 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
270 i, s->h_count[i], s->v_count[i],
271 s->component_id[i], s->quant_index[i]);
274 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
275 av_log(s->avctx, AV_LOG_ERROR,
276 "Subsampling in JPEG-LS is not supported.\n");
280 if (s->v_max == 1 && s->h_max == 1 && s->lossless == 1)
283 /* if different size, realloc/alloc picture */
284 /* XXX: also check h_count and v_count */
285 if (width != s->width || height != s->height) {
286 av_freep(&s->qscale_table);
292 /* test interlaced mode */
293 if (s->first_picture &&
294 s->org_height != 0 &&
295 s->height < ((s->org_height * 3) / 4)) {
297 s->bottom_field = s->interlace_polarity;
298 s->picture_ptr->interlaced_frame = 1;
299 s->picture_ptr->top_field_first = !s->interlace_polarity;
303 avcodec_set_dimensions(s->avctx, width, height);
305 s->qscale_table = av_mallocz((s->width + 15) / 16);
306 s->first_picture = 0;
309 if (s->interlaced && (s->bottom_field == !s->interlace_polarity))
312 /* XXX: not complete test ! */
313 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
314 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
315 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
316 (s->h_count[3] << 4) | s->v_count[3];
317 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
318 /* NOTE we do not allocate pictures large enough for the possible
319 * padding of h/v_count being 4 */
320 if (!(pix_fmt_id & 0xD0D0D0D0))
321 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
322 if (!(pix_fmt_id & 0x0D0D0D0D))
323 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
325 switch (pix_fmt_id) {
328 s->avctx->pix_fmt = PIX_FMT_BGRA;
330 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
331 assert(s->nb_components == 3);
334 s->avctx->pix_fmt = PIX_FMT_GRAY8;
337 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV440P : PIX_FMT_YUVJ440P;
340 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
343 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P;
346 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
350 if (s->nb_components > 1)
351 s->avctx->pix_fmt = PIX_FMT_RGB24;
352 else if (s->bits <= 8)
353 s->avctx->pix_fmt = PIX_FMT_GRAY8;
355 s->avctx->pix_fmt = PIX_FMT_GRAY16;
358 if (s->picture_ptr->data[0])
359 s->avctx->release_buffer(s->avctx, s->picture_ptr);
361 if (s->avctx->get_buffer(s->avctx, s->picture_ptr) < 0) {
362 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
365 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
366 s->picture_ptr->key_frame = 1;
369 for (i = 0; i < 3; i++)
370 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
372 // printf("%d %d %d %d %d %d\n",
373 // s->width, s->height, s->linesize[0], s->linesize[1],
374 // s->interlaced, s->avctx->height);
376 if (len != (8 + (3 * nb_components)))
377 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
379 /* totally blank picture as progressive JPEG will only add details to it */
380 if (s->progressive) {
381 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
382 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
383 for (i = 0; i < s->nb_components; i++) {
384 int size = bw * bh * s->h_count[i] * s->v_count[i];
385 av_freep(&s->blocks[i]);
386 av_freep(&s->last_nnz[i]);
387 s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
388 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
389 s->block_stride[i] = bw * s->h_count[i];
391 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
396 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
399 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
401 av_log(s->avctx, AV_LOG_WARNING,
402 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
403 0, dc_index, &s->vlcs[0][dc_index]);
408 return get_xbits(&s->gb, code);
413 /* decode block and dequantize */
414 static int decode_block(MJpegDecodeContext *s, DCTELEM *block, int component,
415 int dc_index, int ac_index, int16_t *quant_matrix)
417 int code, i, j, level, val;
420 val = mjpeg_decode_dc(s, dc_index);
422 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
425 val = val * quant_matrix[0] + s->last_dc[component];
426 s->last_dc[component] = val;
430 {OPEN_READER(re, &s->gb);
432 UPDATE_CACHE(re, &s->gb);
433 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
435 i += ((unsigned)code) >> 4;
438 if (code > MIN_CACHE_BITS - 16)
439 UPDATE_CACHE(re, &s->gb);
442 int cache = GET_CACHE(re, &s->gb);
443 int sign = (~cache) >> 31;
444 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
447 LAST_SKIP_BITS(re, &s->gb, code);
450 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
453 j = s->scantable.permutated[i];
454 block[j] = level * quant_matrix[j];
457 CLOSE_READER(re, &s->gb);}
462 static int decode_dc_progressive(MJpegDecodeContext *s, DCTELEM *block,
463 int component, int dc_index,
464 int16_t *quant_matrix, int Al)
467 s->dsp.clear_block(block);
468 val = mjpeg_decode_dc(s, dc_index);
470 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
473 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
474 s->last_dc[component] = val;
479 /* decode block and dequantize - progressive JPEG version */
480 static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block,
481 uint8_t *last_nnz, int ac_index,
482 int16_t *quant_matrix,
483 int ss, int se, int Al, int *EOBRUN)
485 int code, i, j, level, val, run;
493 OPEN_READER(re, &s->gb);
494 for (i = ss; ; i++) {
495 UPDATE_CACHE(re, &s->gb);
496 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
498 run = ((unsigned) code) >> 4;
502 if (code > MIN_CACHE_BITS - 16)
503 UPDATE_CACHE(re, &s->gb);
506 int cache = GET_CACHE(re, &s->gb);
507 int sign = (~cache) >> 31;
508 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
511 LAST_SKIP_BITS(re, &s->gb, code);
515 j = s->scantable.permutated[se];
516 block[j] = level * quant_matrix[j] << Al;
519 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
522 j = s->scantable.permutated[i];
523 block[j] = level * quant_matrix[j] << Al;
525 if (run == 0xF) {// ZRL - skip 15 coefficients
528 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
534 UPDATE_CACHE(re, &s->gb);
535 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
536 LAST_SKIP_BITS(re, &s->gb, run);
543 CLOSE_READER(re, &s->gb);
552 #define REFINE_BIT(j) { \
553 UPDATE_CACHE(re, &s->gb); \
554 sign = block[j] >> 15; \
555 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
556 ((quant_matrix[j] ^ sign) - sign) << Al; \
557 LAST_SKIP_BITS(re, &s->gb, 1); \
565 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
570 j = s->scantable.permutated[i]; \
573 else if (run-- == 0) \
577 /* decode block and dequantize - progressive JPEG refinement pass */
578 static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block,
580 int ac_index, int16_t *quant_matrix,
581 int ss, int se, int Al, int *EOBRUN)
583 int code, i = ss, j, sign, val, run;
584 int last = FFMIN(se, *last_nnz);
586 OPEN_READER(re, &s->gb);
591 UPDATE_CACHE(re, &s->gb);
592 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
595 run = ((unsigned) code) >> 4;
596 UPDATE_CACHE(re, &s->gb);
597 val = SHOW_UBITS(re, &s->gb, 1);
598 LAST_SKIP_BITS(re, &s->gb, 1);
600 j = s->scantable.permutated[i];
602 block[j] = ((quant_matrix[j]^val) - val) << Al;
606 CLOSE_READER(re, &s->gb);
610 run = ((unsigned) code) >> 4;
617 UPDATE_CACHE(re, &s->gb);
618 run += SHOW_UBITS(re, &s->gb, val);
619 LAST_SKIP_BITS(re, &s->gb, val);
631 for (; i <= last; i++) {
632 j = s->scantable.permutated[i];
636 CLOSE_READER(re, &s->gb);
643 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor,
647 uint16_t (*buffer)[4];
648 int left[3], top[3], topleft[3];
649 const int linesize = s->linesize[0];
650 const int mask = (1 << s->bits) - 1;
652 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
653 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
654 buffer = s->ljpeg_buffer;
656 for (i = 0; i < 3; i++)
657 buffer[0][i] = 1 << (s->bits + point_transform - 1);
659 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
660 const int modified_predictor = mb_y ? predictor : 1;
661 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
663 if (s->interlaced && s->bottom_field)
664 ptr += linesize >> 1;
666 for (i = 0; i < 3; i++)
667 top[i] = left[i] = topleft[i] = buffer[0][i];
669 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
670 if (s->restart_interval && !s->restart_count)
671 s->restart_count = s->restart_interval;
673 for (i = 0; i < 3; i++) {
677 top[i] = buffer[mb_x][i];
679 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
681 left[i] = buffer[mb_x][i] =
682 mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
685 if (s->restart_interval && !--s->restart_count) {
686 align_get_bits(&s->gb);
687 skip_bits(&s->gb, 16); /* skip RSTn */
692 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
693 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
694 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
695 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
697 } else if (s->pegasus_rct) {
698 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
699 ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
700 ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
701 ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
704 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
705 ptr[4 * mb_x + 0] = buffer[mb_x][2];
706 ptr[4 * mb_x + 1] = buffer[mb_x][1];
707 ptr[4 * mb_x + 2] = buffer[mb_x][0];
714 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
718 const int nb_components = 3;
720 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
721 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
722 if (s->restart_interval && !s->restart_count)
723 s->restart_count = s->restart_interval;
725 if (mb_x == 0 || mb_y == 0 || s->interlaced) {
726 for (i = 0; i < nb_components; i++) {
728 int n, h, v, x, y, c, j, linesize;
730 c = s->comp_index[i];
735 linesize = s->linesize[c];
737 for (j = 0; j < n; j++) {
739 // FIXME optimize this crap
740 ptr = s->picture_ptr->data[c] +
741 (linesize * (v * mb_y + y)) +
743 if (y == 0 && mb_y == 0) {
744 if (x == 0 && mb_x == 0)
745 pred = 128 << point_transform;
749 if (x == 0 && mb_x == 0)
750 pred = ptr[-linesize];
752 PREDICT(pred, ptr[-linesize - 1],
753 ptr[-linesize], ptr[-1], predictor);
756 if (s->interlaced && s->bottom_field)
757 ptr += linesize >> 1;
758 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
767 for (i = 0; i < nb_components; i++) {
769 int n, h, v, x, y, c, j, linesize;
771 c = s->comp_index[i];
776 linesize = s->linesize[c];
778 for (j = 0; j < n; j++) {
781 // FIXME optimize this crap
782 ptr = s->picture_ptr->data[c] +
783 (linesize * (v * mb_y + y)) +
785 PREDICT(pred, ptr[-linesize - 1],
786 ptr[-linesize], ptr[-1], predictor);
787 *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
795 if (s->restart_interval && !--s->restart_count) {
796 align_get_bits(&s->gb);
797 skip_bits(&s->gb, 16); /* skip RSTn */
804 static av_always_inline void mjpeg_copy_block(uint8_t *dst, const uint8_t *src,
805 int linesize, int lowres)
808 case 0: copy_block8(dst, src, linesize, linesize, 8);
810 case 1: copy_block4(dst, src, linesize, linesize, 4);
812 case 2: copy_block2(dst, src, linesize, linesize, 2);
819 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
820 int Al, const uint8_t *mb_bitmask,
821 const AVFrame *reference)
824 uint8_t *data[MAX_COMPONENTS];
825 const uint8_t *reference_data[MAX_COMPONENTS];
826 int linesize[MAX_COMPONENTS];
827 GetBitContext mb_bitmask_gb;
830 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
832 if (s->flipped && s->avctx->flags & CODEC_FLAG_EMU_EDGE) {
833 av_log(s->avctx, AV_LOG_ERROR,
834 "Can not flip image with CODEC_FLAG_EMU_EDGE set!\n");
838 for (i = 0; i < nb_components; i++) {
839 int c = s->comp_index[i];
840 data[c] = s->picture_ptr->data[c];
841 reference_data[c] = reference ? reference->data[c] : NULL;
842 linesize[c] = s->linesize[c];
843 s->coefs_finished[c] |= 1;
845 // picture should be flipped upside-down for this codec
846 int offset = (linesize[c] * (s->v_scount[i] *
847 (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
849 reference_data[c] += offset;
854 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
855 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
856 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
858 if (s->restart_interval && !s->restart_count)
859 s->restart_count = s->restart_interval;
861 if (get_bits_count(&s->gb)>s->gb.size_in_bits) {
862 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
863 get_bits_count(&s->gb) - s->gb.size_in_bits);
866 for (i = 0; i < nb_components; i++) {
868 int n, h, v, x, y, c, j;
871 c = s->comp_index[i];
876 for (j = 0; j < n; j++) {
877 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
878 (h * mb_x + x) * 8) >> s->avctx->lowres);
880 if (s->interlaced && s->bottom_field)
881 block_offset += linesize[c] >> 1;
882 ptr = data[c] + block_offset;
883 if (!s->progressive) {
885 mjpeg_copy_block(ptr, reference_data[c] + block_offset,
886 linesize[c], s->avctx->lowres);
888 s->dsp.clear_block(s->block);
889 if (decode_block(s, s->block, i,
890 s->dc_index[i], s->ac_index[i],
891 s->quant_matrixes[s->quant_index[c]]) < 0) {
892 av_log(s->avctx, AV_LOG_ERROR,
893 "error y=%d x=%d\n", mb_y, mb_x);
896 s->dsp.idct_put(ptr, linesize[c], s->block);
899 int block_idx = s->block_stride[c] * (v * mb_y + y) +
901 DCTELEM *block = s->blocks[c][block_idx];
903 block[0] += get_bits1(&s->gb) *
904 s->quant_matrixes[s->quant_index[c]][0] << Al;
905 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
906 s->quant_matrixes[s->quant_index[c]],
908 av_log(s->avctx, AV_LOG_ERROR,
909 "error y=%d x=%d\n", mb_y, mb_x);
913 // av_log(s->avctx, AV_LOG_DEBUG, "mb: %d %d processed\n",
915 // av_log(NULL, AV_LOG_DEBUG, "%d %d %d %d %d %d %d %d \n",
916 // mb_x, mb_y, x, y, c, s->bottom_field,
917 // (v * mb_y + y) * 8, (h * mb_x + x) * 8);
925 if (s->restart_interval) {
927 i = 8 + ((-get_bits_count(&s->gb)) & 7);
929 if (show_bits(&s->gb, i) == (1 << i) - 1) {
930 int pos = get_bits_count(&s->gb);
931 align_get_bits(&s->gb);
932 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
933 skip_bits(&s->gb, 8);
934 if ((get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
935 for (i = 0; i < nb_components; i++) /* reset dc */
936 s->last_dc[i] = 1024;
938 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
946 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
947 int se, int Ah, int Al,
948 const uint8_t *mb_bitmask,
949 const AVFrame *reference)
953 int c = s->comp_index[0];
954 uint8_t *data = s->picture_ptr->data[c];
955 const uint8_t *reference_data = reference ? reference->data[c] : NULL;
956 int linesize = s->linesize[c];
958 int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
959 GetBitContext mb_bitmask_gb;
962 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
965 s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
966 last_scan = !~s->coefs_finished[c];
969 if (s->interlaced && s->bottom_field) {
970 int offset = linesize >> 1;
972 reference_data += offset;
975 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
976 int block_offset = (mb_y * linesize * 8 >> s->avctx->lowres);
977 uint8_t *ptr = data + block_offset;
978 int block_idx = mb_y * s->block_stride[c];
979 DCTELEM (*block)[64] = &s->blocks[c][block_idx];
980 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
981 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
982 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
987 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
988 quant_matrix, ss, se, Al, &EOBRUN);
990 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
991 quant_matrix, ss, se, Al, &EOBRUN);
993 av_log(s->avctx, AV_LOG_ERROR,
994 "error y=%d x=%d\n", mb_y, mb_x);
1001 mjpeg_copy_block(ptr, reference_data + block_offset,
1002 linesize, s->avctx->lowres);
1004 s->dsp.idct_put(ptr, linesize, *block);
1005 ptr += 8 >> s->avctx->lowres;
1013 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1014 const AVFrame *reference)
1016 int len, nb_components, i, h, v, predictor, point_transform;
1018 const int block_size = s->lossless ? 1 : 8;
1019 int ilv, prev_shift;
1021 /* XXX: verify len field validity */
1022 len = get_bits(&s->gb, 16);
1023 nb_components = get_bits(&s->gb, 8);
1024 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1025 av_log(s->avctx, AV_LOG_ERROR,
1026 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1029 if (len != 6 + 2 * nb_components) {
1030 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1033 for (i = 0; i < nb_components; i++) {
1034 id = get_bits(&s->gb, 8) - 1;
1035 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1036 /* find component index */
1037 for (index = 0; index < s->nb_components; index++)
1038 if (id == s->component_id[index])
1040 if (index == s->nb_components) {
1041 av_log(s->avctx, AV_LOG_ERROR,
1042 "decode_sos: index(%d) out of components\n", index);
1045 /* Metasoft MJPEG codec has Cb and Cr swapped */
1046 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1047 && nb_components == 3 && s->nb_components == 3 && i)
1050 s->comp_index[i] = index;
1052 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1053 s->h_scount[i] = s->h_count[index];
1054 s->v_scount[i] = s->v_count[index];
1056 s->dc_index[i] = get_bits(&s->gb, 4);
1057 s->ac_index[i] = get_bits(&s->gb, 4);
1059 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1060 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1062 if (!s->vlcs[0][s->dc_index[i]].table ||
1063 !s->vlcs[1][s->ac_index[i]].table)
1067 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1068 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1069 prev_shift = get_bits(&s->gb, 4); /* Ah */
1070 point_transform = get_bits(&s->gb, 4); /* Al */
1072 for (i = 0; i < nb_components; i++)
1073 s->last_dc[i] = 1024;
1075 if (nb_components > 1) {
1076 /* interleaved stream */
1077 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1078 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1079 } else if (!s->ls) { /* skip this for JPEG-LS */
1080 h = s->h_max / s->h_scount[0];
1081 v = s->v_max / s->v_scount[0];
1082 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1083 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1084 s->nb_blocks[0] = 1;
1089 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1090 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n",
1091 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1092 predictor, point_transform, ilv, s->bits,
1093 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
1096 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1097 for (i = s->mjpb_skiptosod; i > 0; i--)
1098 skip_bits(&s->gb, 8);
1101 if (CONFIG_JPEGLS_DECODER && s->ls) {
1103 // reset_ls_coding_parameters(s, 0);
1105 if (ff_jpegls_decode_picture(s, predictor, point_transform, ilv) < 0)
1109 if (ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)
1112 if (ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0)
1117 if (s->progressive && predictor) {
1118 if (mjpeg_decode_scan_progressive_ac(s, predictor, ilv, prev_shift,
1120 mb_bitmask, reference) < 0)
1123 if (mjpeg_decode_scan(s, nb_components, prev_shift, point_transform,
1124 mb_bitmask, reference) < 0)
1131 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1135 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1137 if (get_bits(&s->gb, 16) != 4)
1139 s->restart_interval = get_bits(&s->gb, 16);
1140 s->restart_count = 0;
1141 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1142 s->restart_interval);
1147 static int mjpeg_decode_app(MJpegDecodeContext *s)
1151 len = get_bits(&s->gb, 16);
1154 if (8 * len + get_bits_count(&s->gb) > s->gb.size_in_bits)
1157 id = get_bits_long(&s->gb, 32);
1158 id = av_be2ne32(id);
1161 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1162 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1164 /* Buggy AVID, it puts EOI only at every 10th frame. */
1165 /* Also, this fourcc is used by non-avid files too, it holds some
1166 information, but it's always present in AVID-created files. */
1167 if (id == AV_RL32("AVI1")) {
1173 4bytes field_size_less_padding
1176 // if (s->first_picture)
1177 // printf("mjpeg: workarounding buggy AVID\n");
1178 i = get_bits(&s->gb, 8);
1180 s->bottom_field = 1;
1182 s->bottom_field = 0;
1184 skip_bits(&s->gb, 8);
1185 skip_bits(&s->gb, 32);
1186 skip_bits(&s->gb, 32);
1189 // if (s->interlace_polarity)
1190 // printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
1196 if (id == AV_RL32("JFIF")) {
1197 int t_w, t_h, v1, v2;
1198 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1199 v1 = get_bits(&s->gb, 8);
1200 v2 = get_bits(&s->gb, 8);
1201 skip_bits(&s->gb, 8);
1203 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1204 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1206 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1207 av_log(s->avctx, AV_LOG_INFO,
1208 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1210 s->avctx->sample_aspect_ratio.num,
1211 s->avctx->sample_aspect_ratio.den);
1213 t_w = get_bits(&s->gb, 8);
1214 t_h = get_bits(&s->gb, 8);
1216 /* skip thumbnail */
1217 if (len -10 - (t_w * t_h * 3) > 0)
1218 len -= t_w * t_h * 3;
1224 if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1225 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1226 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1227 skip_bits(&s->gb, 16); /* version */
1228 skip_bits(&s->gb, 16); /* flags0 */
1229 skip_bits(&s->gb, 16); /* flags1 */
1230 skip_bits(&s->gb, 8); /* transform */
1235 if (id == AV_RL32("LJIF")) {
1236 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1237 av_log(s->avctx, AV_LOG_INFO,
1238 "Pegasus lossless jpeg header found\n");
1239 skip_bits(&s->gb, 16); /* version ? */
1240 skip_bits(&s->gb, 16); /* unknwon always 0? */
1241 skip_bits(&s->gb, 16); /* unknwon always 0? */
1242 skip_bits(&s->gb, 16); /* unknwon always 0? */
1243 switch (get_bits(&s->gb, 8)) {
1253 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1260 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1261 id = get_bits_long(&s->gb, 32);
1262 id = av_be2ne32(id);
1265 if (id == AV_RL32("mjpg")) {
1267 skip_bits(&s->gb, 32); /* field size */
1268 skip_bits(&s->gb, 32); /* pad field size */
1269 skip_bits(&s->gb, 32); /* next off */
1270 skip_bits(&s->gb, 32); /* quant off */
1271 skip_bits(&s->gb, 32); /* huff off */
1272 skip_bits(&s->gb, 32); /* image off */
1273 skip_bits(&s->gb, 32); /* scan off */
1274 skip_bits(&s->gb, 32); /* data off */
1276 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1277 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1282 /* slow but needed for extreme adobe jpegs */
1284 av_log(s->avctx, AV_LOG_ERROR,
1285 "mjpeg: error, decode_app parser read over the end\n");
1287 skip_bits(&s->gb, 8);
1292 static int mjpeg_decode_com(MJpegDecodeContext *s)
1294 int len = get_bits(&s->gb, 16);
1296 8 * len - 16 + get_bits_count(&s->gb) <= s->gb.size_in_bits) {
1297 char *cbuf = av_malloc(len - 1);
1300 for (i = 0; i < len - 2; i++)
1301 cbuf[i] = get_bits(&s->gb, 8);
1302 if (i > 0 && cbuf[i - 1] == '\n')
1307 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1308 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1310 /* buggy avid, it puts EOI only at every 10th frame */
1311 if (!strcmp(cbuf, "AVID")) {
1313 // if (s->first_picture)
1314 // printf("mjpeg: workarounding buggy AVID\n");
1315 } else if (!strcmp(cbuf, "CS=ITU601"))
1317 else if ((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
1318 (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1328 /* return the 8 bit start code value and update the search
1329 state. Return -1 if no start code found */
1330 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1332 const uint8_t *buf_ptr;
1339 buf_ptr = *pbuf_ptr;
1340 while (buf_ptr < buf_end) {
1343 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1353 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1354 *pbuf_ptr = buf_ptr;
1358 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1359 const uint8_t **buf_ptr, const uint8_t *buf_end,
1360 const uint8_t **unescaped_buf_ptr,
1361 int *unescaped_buf_size)
1364 start_code = find_marker(buf_ptr, buf_end);
1366 if ((buf_end - *buf_ptr) > s->buffer_size) {
1368 s->buffer_size = buf_end - *buf_ptr;
1369 s->buffer = av_malloc(s->buffer_size + FF_INPUT_BUFFER_PADDING_SIZE);
1370 av_log(s->avctx, AV_LOG_DEBUG,
1371 "buffer too small, expanding to %d bytes\n", s->buffer_size);
1374 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1375 if (start_code == SOS && !s->ls) {
1376 const uint8_t *src = *buf_ptr;
1377 uint8_t *dst = s->buffer;
1379 while (src < buf_end) {
1380 uint8_t x = *(src++);
1383 if (s->avctx->codec_id != CODEC_ID_THP) {
1385 while (src < buf_end && x == 0xff)
1388 if (x >= 0xd0 && x <= 0xd7)
1395 *unescaped_buf_ptr = s->buffer;
1396 *unescaped_buf_size = dst - s->buffer;
1398 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1399 (buf_end - *buf_ptr) - (dst - s->buffer));
1400 } else if (start_code == SOS && s->ls) {
1401 const uint8_t *src = *buf_ptr;
1402 uint8_t *dst = s->buffer;
1410 while (src + t < buf_end) {
1411 uint8_t x = src[t++];
1413 while ((src + t < buf_end) && x == 0xff)
1422 init_put_bits(&pb, dst, t);
1424 /* unescape bitstream */
1426 uint8_t x = src[b++];
1427 put_bits(&pb, 8, x);
1430 put_bits(&pb, 7, x);
1434 flush_put_bits(&pb);
1436 *unescaped_buf_ptr = dst;
1437 *unescaped_buf_size = (bit_count + 7) >> 3;
1439 *unescaped_buf_ptr = *buf_ptr;
1440 *unescaped_buf_size = buf_end - *buf_ptr;
1446 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
1449 const uint8_t *buf = avpkt->data;
1450 int buf_size = avpkt->size;
1451 MJpegDecodeContext *s = avctx->priv_data;
1452 const uint8_t *buf_end, *buf_ptr;
1453 const uint8_t *unescaped_buf_ptr;
1454 int unescaped_buf_size;
1456 AVFrame *picture = data;
1458 s->got_picture = 0; // picture from previous image can not be reused
1460 buf_end = buf + buf_size;
1461 while (buf_ptr < buf_end) {
1462 /* find start next marker */
1463 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1465 &unescaped_buf_size);
1467 if (start_code < 0) {
1470 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1471 start_code, buf_end - buf_ptr);
1473 init_get_bits(&s->gb, unescaped_buf_ptr, unescaped_buf_size * 8);
1475 s->start_code = start_code;
1476 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1477 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1479 /* process markers */
1480 if (start_code >= 0xd0 && start_code <= 0xd7)
1481 av_log(avctx, AV_LOG_DEBUG,
1482 "restart marker: %d\n", start_code & 0x0f);
1484 else if (start_code >= APP0 && start_code <= APP15)
1485 mjpeg_decode_app(s);
1487 else if (start_code == COM)
1488 mjpeg_decode_com(s);
1490 switch (start_code) {
1492 s->restart_interval = 0;
1493 s->restart_count = 0;
1494 /* nothing to do on SOI */
1497 ff_mjpeg_decode_dqt(s);
1500 if (ff_mjpeg_decode_dht(s) < 0) {
1501 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1510 if (ff_mjpeg_decode_sof(s) < 0)
1517 if (ff_mjpeg_decode_sof(s) < 0)
1524 if (ff_mjpeg_decode_sof(s) < 0)
1531 if (ff_mjpeg_decode_sof(s) < 0)
1535 if (!CONFIG_JPEGLS_DECODER || ff_jpegls_decode_lse(s) < 0)
1540 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1543 if (!s->got_picture) {
1544 av_log(avctx, AV_LOG_WARNING,
1545 "Found EOI before any SOF, ignoring\n");
1548 if (s->interlaced) {
1549 s->bottom_field ^= 1;
1550 /* if not bottom field, do not output image yet */
1551 if (s->bottom_field == !s->interlace_polarity)
1554 *picture = *s->picture_ptr;
1555 *data_size = sizeof(AVFrame);
1558 picture->quality = FFMAX3(s->qscale[0],
1561 picture->qstride = 0;
1562 picture->qscale_table = s->qscale_table;
1563 memset(picture->qscale_table, picture->quality,
1564 (s->width + 15) / 16);
1565 if (avctx->debug & FF_DEBUG_QP)
1566 av_log(avctx, AV_LOG_DEBUG,
1567 "QP: %d\n", picture->quality);
1568 picture->quality *= FF_QP2LAMBDA;
1573 if (!s->got_picture) {
1574 av_log(avctx, AV_LOG_WARNING,
1575 "Can not process SOS before SOF, skipping\n");
1578 if (ff_mjpeg_decode_sos(s, NULL, NULL) < 0 &&
1579 (avctx->err_recognition & AV_EF_EXPLODE))
1580 return AVERROR_INVALIDDATA;
1581 /* buggy avid puts EOI every 10-20th frame */
1582 /* if restart period is over process EOI */
1583 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
1587 mjpeg_decode_dri(s);
1599 av_log(avctx, AV_LOG_ERROR,
1600 "mjpeg: unsupported coding type (%x)\n", start_code);
1603 // printf("mjpeg: unsupported marker (%x)\n", start_code);
1608 /* eof process start code */
1609 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1610 av_log(avctx, AV_LOG_DEBUG,
1611 "marker parser used %d bytes (%d bits)\n",
1612 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1615 if (s->got_picture) {
1616 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1619 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1622 av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n",
1624 // return buf_end - buf_ptr;
1625 return buf_ptr - buf;
1628 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
1630 MJpegDecodeContext *s = avctx->priv_data;
1633 if (s->picture_ptr && s->picture_ptr->data[0])
1634 avctx->release_buffer(avctx, s->picture_ptr);
1637 av_free(s->qscale_table);
1638 av_freep(&s->ljpeg_buffer);
1639 s->ljpeg_buffer_size = 0;
1641 for (i = 0; i < 3; i++) {
1642 for (j = 0; j < 4; j++)
1643 free_vlc(&s->vlcs[i][j]);
1645 for (i = 0; i < MAX_COMPONENTS; i++) {
1646 av_freep(&s->blocks[i]);
1647 av_freep(&s->last_nnz[i]);
1652 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1653 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1654 static const AVOption options[] = {
1655 { "extern_huff", "Use external huffman table.",
1656 OFFSET(extern_huff), AV_OPT_TYPE_INT, { 0 }, 0, 1, VD },
1660 static const AVClass mjpegdec_class = {
1661 .class_name = "MJPEG decoder",
1662 .item_name = av_default_item_name,
1664 .version = LIBAVUTIL_VERSION_INT,
1667 AVCodec ff_mjpeg_decoder = {
1669 .type = AVMEDIA_TYPE_VIDEO,
1670 .id = CODEC_ID_MJPEG,
1671 .priv_data_size = sizeof(MJpegDecodeContext),
1672 .init = ff_mjpeg_decode_init,
1673 .close = ff_mjpeg_decode_end,
1674 .decode = ff_mjpeg_decode_frame,
1675 .capabilities = CODEC_CAP_DR1,
1677 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1678 .priv_class = &mjpegdec_class,
1681 AVCodec ff_thp_decoder = {
1683 .type = AVMEDIA_TYPE_VIDEO,
1685 .priv_data_size = sizeof(MJpegDecodeContext),
1686 .init = ff_mjpeg_decode_init,
1687 .close = ff_mjpeg_decode_end,
1688 .decode = ff_mjpeg_decode_frame,
1689 .capabilities = CODEC_CAP_DR1,
1691 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),