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 FFmpeg.
13 * FFmpeg 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 * FFmpeg 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 FFmpeg; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
33 #include "libavutil/imgutils.h"
34 #include "libavutil/avassert.h"
35 #include "libavutil/opt.h"
37 #include "copy_block.h"
41 #include "jpeglsdec.h"
44 #include "bytestream.h"
47 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
48 const uint8_t *val_table, int nb_codes,
49 int use_static, int is_ac)
51 uint8_t huff_size[256] = { 0 };
52 uint16_t huff_code[256];
53 uint16_t huff_sym[256];
56 av_assert0(nb_codes <= 256);
58 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
60 for (i = 0; i < 256; i++)
61 huff_sym[i] = i + 16 * is_ac;
64 huff_sym[0] = 16 * 256;
66 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
67 huff_code, 2, 2, huff_sym, 2, 2, use_static);
70 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
72 build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
73 avpriv_mjpeg_val_dc, 12, 0, 0);
74 build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
75 avpriv_mjpeg_val_dc, 12, 0, 0);
76 build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
77 avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
78 build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
79 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
80 build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
81 avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
82 build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
83 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
86 static void parse_avid(MJpegDecodeContext *s, uint8_t *buf, int len)
89 if (len > 14 && buf[12] == 1) /* 1 - NTSC */
90 s->interlace_polarity = 1;
91 if (len > 14 && buf[12] == 2) /* 2 - PAL */
92 s->interlace_polarity = 0;
93 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
94 av_log(s->avctx, AV_LOG_INFO, "AVID: len:%d %d\n", len, len > 14 ? buf[12] : -1);
97 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
99 MJpegDecodeContext *s = avctx->priv_data;
101 if (!s->picture_ptr) {
102 s->picture = av_frame_alloc();
104 return AVERROR(ENOMEM);
105 s->picture_ptr = s->picture;
109 ff_hpeldsp_init(&s->hdsp, avctx->flags);
110 ff_dsputil_init(&s->dsp, avctx);
111 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
115 s->first_picture = 1;
117 s->org_height = avctx->coded_height;
118 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
120 build_basic_mjpeg_vlc(s);
122 if (s->extern_huff) {
123 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
124 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
125 if (ff_mjpeg_decode_dht(s)) {
126 av_log(avctx, AV_LOG_ERROR,
127 "error using external huffman table, switching back to internal\n");
128 build_basic_mjpeg_vlc(s);
131 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
132 s->interlace_polarity = 1; /* bottom field first */
133 av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
134 } else if (avctx->field_order == AV_FIELD_UNKNOWN) {
135 if (avctx->codec_tag == AV_RL32("MJPG"))
136 s->interlace_polarity = 1;
139 if ( avctx->extradata_size > 8
140 && AV_RL32(avctx->extradata) == 0x2C
141 && AV_RL32(avctx->extradata+4) == 0x18) {
142 parse_avid(s, avctx->extradata, avctx->extradata_size);
145 if (avctx->codec->id == AV_CODEC_ID_AMV)
152 /* quantize tables */
153 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
155 int len, index, i, j;
157 len = get_bits(&s->gb, 16) - 2;
160 int pr = get_bits(&s->gb, 4);
162 av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
163 return AVERROR_INVALIDDATA;
165 index = get_bits(&s->gb, 4);
168 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
169 /* read quant table */
170 for (i = 0; i < 64; i++) {
171 j = s->scantable.permutated[i];
172 s->quant_matrixes[index][j] = get_bits(&s->gb, pr ? 16 : 8);
175 // XXX FIXME finetune, and perhaps add dc too
176 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
177 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
178 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
179 index, s->qscale[index]);
185 /* decode huffman tables and build VLC decoders */
186 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
188 int len, index, i, class, n, v, code_max;
189 uint8_t bits_table[17];
190 uint8_t val_table[256];
193 len = get_bits(&s->gb, 16) - 2;
197 return AVERROR_INVALIDDATA;
198 class = get_bits(&s->gb, 4);
200 return AVERROR_INVALIDDATA;
201 index = get_bits(&s->gb, 4);
203 return AVERROR_INVALIDDATA;
205 for (i = 1; i <= 16; i++) {
206 bits_table[i] = get_bits(&s->gb, 8);
210 if (len < n || n > 256)
211 return AVERROR_INVALIDDATA;
214 for (i = 0; i < n; i++) {
215 v = get_bits(&s->gb, 8);
222 /* build VLC and flush previous vlc if present */
223 ff_free_vlc(&s->vlcs[class][index]);
224 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
225 class, index, code_max + 1);
226 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
227 code_max + 1, 0, class > 0)) < 0)
231 ff_free_vlc(&s->vlcs[2][index]);
232 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
233 code_max + 1, 0, 0)) < 0)
240 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
242 int len, nb_components, i, width, height, pix_fmt_id, ret;
243 int h_count[MAX_COMPONENTS];
244 int v_count[MAX_COMPONENTS];
247 s->upscale_h = s->upscale_v = 0;
249 /* XXX: verify len field validity */
250 len = get_bits(&s->gb, 16);
251 s->avctx->bits_per_raw_sample =
252 s->bits = get_bits(&s->gb, 8);
256 if (s->bits == 9 && !s->pegasus_rct)
257 s->rct = 1; // FIXME ugly
259 if(s->lossless && s->avctx->lowres){
260 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
264 height = get_bits(&s->gb, 16);
265 width = get_bits(&s->gb, 16);
267 // HACK for odd_height.mov
268 if (s->interlaced && s->width == width && s->height == height + 1)
271 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
272 if (av_image_check_size(width, height, 0, s->avctx))
273 return AVERROR_INVALIDDATA;
275 nb_components = get_bits(&s->gb, 8);
276 if (nb_components <= 0 ||
277 nb_components > MAX_COMPONENTS)
279 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
280 if (nb_components != s->nb_components) {
281 av_log(s->avctx, AV_LOG_ERROR,
282 "nb_components changing in interlaced picture\n");
283 return AVERROR_INVALIDDATA;
286 if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
287 avpriv_report_missing_feature(s->avctx,
288 "JPEG-LS that is not <= 8 "
289 "bits/component or 16-bit gray");
290 return AVERROR_PATCHWELCOME;
292 s->nb_components = nb_components;
295 memset(h_count, 0, sizeof(h_count));
296 memset(v_count, 0, sizeof(v_count));
297 for (i = 0; i < nb_components; i++) {
299 s->component_id[i] = get_bits(&s->gb, 8) - 1;
300 h_count[i] = get_bits(&s->gb, 4);
301 v_count[i] = get_bits(&s->gb, 4);
302 /* compute hmax and vmax (only used in interleaved case) */
303 if (h_count[i] > s->h_max)
304 s->h_max = h_count[i];
305 if (v_count[i] > s->v_max)
306 s->v_max = v_count[i];
307 s->quant_index[i] = get_bits(&s->gb, 8);
308 if (s->quant_index[i] >= 4) {
309 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
310 return AVERROR_INVALIDDATA;
312 if (!h_count[i] || !v_count[i]) {
313 av_log(s->avctx, AV_LOG_ERROR,
314 "Invalid sampling factor in component %d %d:%d\n",
315 i, h_count[i], v_count[i]);
316 return AVERROR_INVALIDDATA;
319 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
320 i, h_count[i], v_count[i],
321 s->component_id[i], s->quant_index[i]);
324 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
325 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
326 return AVERROR_PATCHWELCOME;
330 /* if different size, realloc/alloc picture */
331 if ( width != s->width || height != s->height
332 || memcmp(s->h_count, h_count, sizeof(h_count))
333 || memcmp(s->v_count, v_count, sizeof(v_count))) {
337 memcpy(s->h_count, h_count, sizeof(h_count));
338 memcpy(s->v_count, v_count, sizeof(v_count));
342 /* test interlaced mode */
343 if (s->first_picture &&
344 s->org_height != 0 &&
345 s->height < ((s->org_height * 3) / 4)) {
347 s->bottom_field = s->interlace_polarity;
348 s->picture_ptr->interlaced_frame = 1;
349 s->picture_ptr->top_field_first = !s->interlace_polarity;
353 ret = ff_set_dimensions(s->avctx, width, height);
357 s->first_picture = 0;
360 if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
361 if (s->progressive) {
362 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
363 return AVERROR_INVALIDDATA;
366 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
368 else if (!s->lossless)
370 /* XXX: not complete test ! */
371 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
372 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
373 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
374 (s->h_count[3] << 4) | s->v_count[3];
375 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
376 /* NOTE we do not allocate pictures large enough for the possible
377 * padding of h/v_count being 4 */
378 if (!(pix_fmt_id & 0xD0D0D0D0))
379 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
380 if (!(pix_fmt_id & 0x0D0D0D0D))
381 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
383 switch (pix_fmt_id) {
386 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
388 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
389 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
391 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
392 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
393 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
396 av_assert0(s->nb_components == 3);
400 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
402 if (s->adobe_transform == 0 && s->bits <= 8) {
403 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
405 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
406 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
409 av_assert0(s->nb_components == 4);
412 if (s->adobe_transform == 0 && s->bits <= 8) {
413 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
416 s->chroma_height = s->height;
417 } else if (s->adobe_transform == 2 && s->bits <= 8) {
418 s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
421 s->chroma_height = s->height;
422 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
424 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
425 else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
426 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
428 av_assert0(s->nb_components == 4);
432 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
435 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
437 s->upscale_h = 2*(pix_fmt_id == 0x22122100);
438 s->chroma_height = s->height;
442 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
445 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
446 s->upscale_v = 2*(pix_fmt_id == 0x22211200);
448 s->chroma_height = s->height;
451 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
454 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
457 s->chroma_height = s->height / 2;
469 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
471 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
476 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
479 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
480 s->upscale_h = 4 * (pix_fmt_id == 0x22211100) + 2 * (pix_fmt_id == 0x22112100);
481 s->chroma_height = s->height / 2;
484 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
485 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
486 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
490 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
493 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
494 s->upscale_v = 2 << (pix_fmt_id == 0x22121100);
497 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
498 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
499 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
502 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
505 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
509 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
510 return AVERROR_PATCHWELCOME;
512 if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
513 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
514 return AVERROR_PATCHWELCOME;
517 s->upscale_h = s->upscale_v = 0;
518 if (s->nb_components > 1)
519 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
520 else if (s->palette_index && s->bits <= 8)
521 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
522 else if (s->bits <= 8)
523 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
525 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
528 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
530 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
534 av_frame_unref(s->picture_ptr);
535 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
537 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
538 s->picture_ptr->key_frame = 1;
541 for (i = 0; i < 4; i++)
542 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
544 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
545 s->width, s->height, s->linesize[0], s->linesize[1],
546 s->interlaced, s->avctx->height);
548 if (len != (8 + (3 * nb_components)))
549 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
552 if (s->rgb && !s->lossless && !s->ls) {
553 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
554 return AVERROR_PATCHWELCOME;
557 /* totally blank picture as progressive JPEG will only add details to it */
558 if (s->progressive) {
559 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
560 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
561 for (i = 0; i < s->nb_components; i++) {
562 int size = bw * bh * s->h_count[i] * s->v_count[i];
563 av_freep(&s->blocks[i]);
564 av_freep(&s->last_nnz[i]);
565 s->blocks[i] = av_mallocz(size * sizeof(**s->blocks));
566 s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
567 if (!s->blocks[i] || !s->last_nnz[i])
568 return AVERROR(ENOMEM);
569 s->block_stride[i] = bw * s->h_count[i];
571 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
576 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
579 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
580 if (code < 0 || code > 16) {
581 av_log(s->avctx, AV_LOG_WARNING,
582 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
583 0, dc_index, &s->vlcs[0][dc_index]);
588 return get_xbits(&s->gb, code);
593 /* decode block and dequantize */
594 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
595 int dc_index, int ac_index, int16_t *quant_matrix)
597 int code, i, j, level, val;
600 val = mjpeg_decode_dc(s, dc_index);
601 if (val == 0xfffff) {
602 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
603 return AVERROR_INVALIDDATA;
605 val = val * quant_matrix[0] + s->last_dc[component];
606 s->last_dc[component] = val;
610 {OPEN_READER(re, &s->gb);
612 UPDATE_CACHE(re, &s->gb);
613 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
615 i += ((unsigned)code) >> 4;
618 if (code > MIN_CACHE_BITS - 16)
619 UPDATE_CACHE(re, &s->gb);
622 int cache = GET_CACHE(re, &s->gb);
623 int sign = (~cache) >> 31;
624 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
627 LAST_SKIP_BITS(re, &s->gb, code);
630 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
631 return AVERROR_INVALIDDATA;
633 j = s->scantable.permutated[i];
634 block[j] = level * quant_matrix[j];
637 CLOSE_READER(re, &s->gb);}
642 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
643 int component, int dc_index,
644 int16_t *quant_matrix, int Al)
647 s->dsp.clear_block(block);
648 val = mjpeg_decode_dc(s, dc_index);
649 if (val == 0xfffff) {
650 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
651 return AVERROR_INVALIDDATA;
653 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
654 s->last_dc[component] = val;
659 /* decode block and dequantize - progressive JPEG version */
660 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
661 uint8_t *last_nnz, int ac_index,
662 int16_t *quant_matrix,
663 int ss, int se, int Al, int *EOBRUN)
665 int code, i, j, level, val, run;
673 OPEN_READER(re, &s->gb);
674 for (i = ss; ; i++) {
675 UPDATE_CACHE(re, &s->gb);
676 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
678 run = ((unsigned) code) >> 4;
682 if (code > MIN_CACHE_BITS - 16)
683 UPDATE_CACHE(re, &s->gb);
686 int cache = GET_CACHE(re, &s->gb);
687 int sign = (~cache) >> 31;
688 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
691 LAST_SKIP_BITS(re, &s->gb, code);
695 j = s->scantable.permutated[se];
696 block[j] = level * quant_matrix[j] << Al;
699 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
700 return AVERROR_INVALIDDATA;
702 j = s->scantable.permutated[i];
703 block[j] = level * quant_matrix[j] << Al;
705 if (run == 0xF) {// ZRL - skip 15 coefficients
708 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
709 return AVERROR_INVALIDDATA;
714 UPDATE_CACHE(re, &s->gb);
715 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
716 LAST_SKIP_BITS(re, &s->gb, run);
723 CLOSE_READER(re, &s->gb);
732 #define REFINE_BIT(j) { \
733 UPDATE_CACHE(re, &s->gb); \
734 sign = block[j] >> 15; \
735 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
736 ((quant_matrix[j] ^ sign) - sign) << Al; \
737 LAST_SKIP_BITS(re, &s->gb, 1); \
745 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
750 j = s->scantable.permutated[i]; \
753 else if (run-- == 0) \
757 /* decode block and dequantize - progressive JPEG refinement pass */
758 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
760 int ac_index, int16_t *quant_matrix,
761 int ss, int se, int Al, int *EOBRUN)
763 int code, i = ss, j, sign, val, run;
764 int last = FFMIN(se, *last_nnz);
766 OPEN_READER(re, &s->gb);
771 UPDATE_CACHE(re, &s->gb);
772 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
775 run = ((unsigned) code) >> 4;
776 UPDATE_CACHE(re, &s->gb);
777 val = SHOW_UBITS(re, &s->gb, 1);
778 LAST_SKIP_BITS(re, &s->gb, 1);
780 j = s->scantable.permutated[i];
782 block[j] = ((quant_matrix[j]^val) - val) << Al;
786 CLOSE_READER(re, &s->gb);
790 run = ((unsigned) code) >> 4;
797 UPDATE_CACHE(re, &s->gb);
798 run += SHOW_UBITS(re, &s->gb, val);
799 LAST_SKIP_BITS(re, &s->gb, val);
811 for (; i <= last; i++) {
812 j = s->scantable.permutated[i];
816 CLOSE_READER(re, &s->gb);
823 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
828 if (s->restart_interval) {
830 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
831 align_get_bits(&s->gb);
832 for (i = 0; i < nb_components; i++) /* reset dc */
833 s->last_dc[i] = (4 << s->bits);
836 i = 8 + ((-get_bits_count(&s->gb)) & 7);
838 if (s->restart_count == 0) {
839 if( show_bits(&s->gb, i) == (1 << i) - 1
840 || show_bits(&s->gb, i) == 0xFF) {
841 int pos = get_bits_count(&s->gb);
842 align_get_bits(&s->gb);
843 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
844 skip_bits(&s->gb, 8);
845 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
846 for (i = 0; i < nb_components; i++) /* reset dc */
847 s->last_dc[i] = (4 << s->bits);
850 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
857 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
860 uint16_t (*buffer)[4];
861 int left[4], top[4], topleft[4];
862 const int linesize = s->linesize[0];
863 const int mask = ((1 << s->bits) - 1) << point_transform;
867 if (s->nb_components != 3 && s->nb_components != 4)
868 return AVERROR_INVALIDDATA;
869 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
870 return AVERROR_INVALIDDATA;
873 s->restart_count = s->restart_interval;
875 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
876 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
877 buffer = s->ljpeg_buffer;
879 for (i = 0; i < 4; i++)
880 buffer[0][i] = 1 << (s->bits - 1);
882 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
883 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
885 if (s->interlaced && s->bottom_field)
886 ptr += linesize >> 1;
888 for (i = 0; i < 4; i++)
889 top[i] = left[i] = topleft[i] = buffer[0][i];
891 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
892 int modified_predictor = predictor;
894 if (s->restart_interval && !s->restart_count){
895 s->restart_count = s->restart_interval;
899 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
901 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
902 modified_predictor = 1;
904 for (i=0;i<nb_components;i++) {
908 top[i] = buffer[mb_x][i];
910 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
912 dc = mjpeg_decode_dc(s, s->dc_index[i]);
916 left[i] = buffer[mb_x][i] =
917 mask & (pred + (dc << point_transform));
920 if (s->restart_interval && !--s->restart_count) {
921 align_get_bits(&s->gb);
922 skip_bits(&s->gb, 16); /* skip RSTn */
925 if (s->nb_components == 4) {
926 for(i=0; i<nb_components; i++) {
927 int c= s->comp_index[i];
929 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
930 ptr[4*mb_x+3-c] = buffer[mb_x][i];
932 } else if(s->bits == 9) {
933 return AVERROR_PATCHWELCOME;
935 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
936 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
941 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
942 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
943 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
944 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
946 } else if (s->pegasus_rct) {
947 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
948 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
949 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
950 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
953 for(i=0; i<nb_components; i++) {
954 int c= s->comp_index[i];
956 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
957 ptr[3*mb_x+2-c] = buffer[mb_x][i];
959 } else if(s->bits == 9) {
960 return AVERROR_PATCHWELCOME;
962 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
963 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
972 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
973 int point_transform, int nb_components)
975 int i, mb_x, mb_y, mask;
976 int bits= (s->bits+7)&~7;
980 point_transform += bits - s->bits;
981 mask = ((1 << s->bits) - 1) << point_transform;
983 av_assert0(nb_components>=1 && nb_components<=4);
985 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
986 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
987 if (s->restart_interval && !s->restart_count){
988 s->restart_count = s->restart_interval;
993 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
994 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
995 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
996 for (i = 0; i < nb_components; i++) {
999 int n, h, v, x, y, c, j, linesize;
1000 n = s->nb_blocks[i];
1001 c = s->comp_index[i];
1006 linesize= s->linesize[c];
1008 if(bits>8) linesize /= 2;
1010 for(j=0; j<n; j++) {
1013 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1017 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1019 if(x==0 && leftcol){
1020 pred= 1 << (bits - 1);
1025 if(x==0 && leftcol){
1026 pred= ptr[-linesize];
1028 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1032 if (s->interlaced && s->bottom_field)
1033 ptr += linesize >> 1;
1035 *ptr= pred + (dc << point_transform);
1037 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1039 if(x==0 && leftcol){
1040 pred= 1 << (bits - 1);
1045 if(x==0 && leftcol){
1046 pred= ptr16[-linesize];
1048 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1052 if (s->interlaced && s->bottom_field)
1053 ptr16 += linesize >> 1;
1055 *ptr16= pred + (dc << point_transform);
1064 for (i = 0; i < nb_components; i++) {
1067 int n, h, v, x, y, c, j, linesize, dc;
1068 n = s->nb_blocks[i];
1069 c = s->comp_index[i];
1074 linesize = s->linesize[c];
1076 if(bits>8) linesize /= 2;
1078 for (j = 0; j < n; j++) {
1081 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1085 ptr = s->picture_ptr->data[c] +
1086 (linesize * (v * mb_y + y)) +
1087 (h * mb_x + x); //FIXME optimize this crap
1088 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1091 *ptr = pred + (dc << point_transform);
1093 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1094 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1097 *ptr16= pred + (dc << point_transform);
1107 if (s->restart_interval && !--s->restart_count) {
1108 align_get_bits(&s->gb);
1109 skip_bits(&s->gb, 16); /* skip RSTn */
1116 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1117 uint8_t *dst, const uint8_t *src,
1118 int linesize, int lowres)
1121 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1123 case 1: copy_block4(dst, src, linesize, linesize, 4);
1125 case 2: copy_block2(dst, src, linesize, linesize, 2);
1127 case 3: *dst = *src;
1132 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1134 int block_x, block_y;
1135 int size = 8 >> s->avctx->lowres;
1137 for (block_y=0; block_y<size; block_y++)
1138 for (block_x=0; block_x<size; block_x++)
1139 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1141 for (block_y=0; block_y<size; block_y++)
1142 for (block_x=0; block_x<size; block_x++)
1143 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1147 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1148 int Al, const uint8_t *mb_bitmask,
1149 int mb_bitmask_size,
1150 const AVFrame *reference)
1153 uint8_t *data[MAX_COMPONENTS];
1154 const uint8_t *reference_data[MAX_COMPONENTS];
1155 int linesize[MAX_COMPONENTS];
1156 GetBitContext mb_bitmask_gb;
1157 int bytes_per_pixel = 1 + (s->bits > 8);
1160 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1161 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1162 return AVERROR_INVALIDDATA;
1164 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1167 s->restart_count = 0;
1169 for (i = 0; i < nb_components; i++) {
1170 int c = s->comp_index[i];
1171 data[c] = s->picture_ptr->data[c];
1172 reference_data[c] = reference ? reference->data[c] : NULL;
1173 linesize[c] = s->linesize[c];
1174 s->coefs_finished[c] |= 1;
1177 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1178 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1179 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1181 if (s->restart_interval && !s->restart_count)
1182 s->restart_count = s->restart_interval;
1184 if (get_bits_left(&s->gb) < 0) {
1185 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1186 -get_bits_left(&s->gb));
1187 return AVERROR_INVALIDDATA;
1189 for (i = 0; i < nb_components; i++) {
1191 int n, h, v, x, y, c, j;
1193 n = s->nb_blocks[i];
1194 c = s->comp_index[i];
1199 for (j = 0; j < n; j++) {
1200 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1201 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1203 if (s->interlaced && s->bottom_field)
1204 block_offset += linesize[c] >> 1;
1205 ptr = data[c] + block_offset;
1206 if (!s->progressive) {
1208 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1209 linesize[c], s->avctx->lowres);
1212 s->dsp.clear_block(s->block);
1213 if (decode_block(s, s->block, i,
1214 s->dc_index[i], s->ac_index[i],
1215 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1216 av_log(s->avctx, AV_LOG_ERROR,
1217 "error y=%d x=%d\n", mb_y, mb_x);
1218 return AVERROR_INVALIDDATA;
1220 s->dsp.idct_put(ptr, linesize[c], s->block);
1222 shift_output(s, ptr, linesize[c]);
1225 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1227 int16_t *block = s->blocks[c][block_idx];
1229 block[0] += get_bits1(&s->gb) *
1230 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1231 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1232 s->quant_matrixes[s->quant_sindex[i]],
1234 av_log(s->avctx, AV_LOG_ERROR,
1235 "error y=%d x=%d\n", mb_y, mb_x);
1236 return AVERROR_INVALIDDATA;
1239 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1240 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1241 mb_x, mb_y, x, y, c, s->bottom_field,
1242 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1250 handle_rstn(s, nb_components);
1256 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1257 int se, int Ah, int Al)
1261 int c = s->comp_index[0];
1262 uint8_t *data = s->picture_ptr->data[c];
1263 int linesize = s->linesize[c];
1265 int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1266 int bytes_per_pixel = 1 + (s->bits > 8);
1268 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1269 if (se < ss || se > 63) {
1270 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1271 return AVERROR_INVALIDDATA;
1275 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1276 last_scan = !~s->coefs_finished[c];
1279 if (s->interlaced && s->bottom_field)
1280 data += linesize >> 1;
1282 s->restart_count = 0;
1284 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1285 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1286 int block_idx = mb_y * s->block_stride[c];
1287 int16_t (*block)[64] = &s->blocks[c][block_idx];
1288 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1289 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1291 if (s->restart_interval && !s->restart_count)
1292 s->restart_count = s->restart_interval;
1295 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1296 quant_matrix, ss, se, Al, &EOBRUN);
1298 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1299 quant_matrix, ss, se, Al, &EOBRUN);
1301 av_log(s->avctx, AV_LOG_ERROR,
1302 "error y=%d x=%d\n", mb_y, mb_x);
1303 return AVERROR_INVALIDDATA;
1307 s->dsp.idct_put(ptr, linesize, *block);
1309 shift_output(s, ptr, linesize);
1310 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1312 if (handle_rstn(s, 0))
1319 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1320 int mb_bitmask_size, const AVFrame *reference)
1322 int len, nb_components, i, h, v, predictor, point_transform;
1324 const int block_size = s->lossless ? 1 : 8;
1325 int ilv, prev_shift;
1327 if (!s->got_picture) {
1328 av_log(s->avctx, AV_LOG_WARNING,
1329 "Can not process SOS before SOF, skipping\n");
1333 av_assert0(s->picture_ptr->data[0]);
1334 /* XXX: verify len field validity */
1335 len = get_bits(&s->gb, 16);
1336 nb_components = get_bits(&s->gb, 8);
1337 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1338 av_log(s->avctx, AV_LOG_ERROR,
1339 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1340 return AVERROR_PATCHWELCOME;
1342 if (len != 6 + 2 * nb_components) {
1343 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1344 return AVERROR_INVALIDDATA;
1346 for (i = 0; i < nb_components; i++) {
1347 id = get_bits(&s->gb, 8) - 1;
1348 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1349 /* find component index */
1350 for (index = 0; index < s->nb_components; index++)
1351 if (id == s->component_id[index])
1353 if (index == s->nb_components) {
1354 av_log(s->avctx, AV_LOG_ERROR,
1355 "decode_sos: index(%d) out of components\n", index);
1356 return AVERROR_INVALIDDATA;
1358 /* Metasoft MJPEG codec has Cb and Cr swapped */
1359 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1360 && nb_components == 3 && s->nb_components == 3 && i)
1363 s->quant_sindex[i] = s->quant_index[index];
1364 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1365 s->h_scount[i] = s->h_count[index];
1366 s->v_scount[i] = s->v_count[index];
1368 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1370 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1371 index = (index+2)%3;
1373 s->comp_index[i] = index;
1375 s->dc_index[i] = get_bits(&s->gb, 4);
1376 s->ac_index[i] = get_bits(&s->gb, 4);
1378 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1379 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1381 if (!s->vlcs[0][s->dc_index[i]].table || !(s->progressive ? s->vlcs[2][s->ac_index[0]].table : s->vlcs[1][s->ac_index[i]].table))
1385 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1386 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1387 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1388 prev_shift = get_bits(&s->gb, 4); /* Ah */
1389 point_transform = get_bits(&s->gb, 4); /* Al */
1391 prev_shift = point_transform = 0;
1393 if (nb_components > 1) {
1394 /* interleaved stream */
1395 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1396 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1397 } else if (!s->ls) { /* skip this for JPEG-LS */
1398 h = s->h_max / s->h_scount[0];
1399 v = s->v_max / s->v_scount[0];
1400 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1401 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1402 s->nb_blocks[0] = 1;
1407 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1408 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1409 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1410 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1411 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1414 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1415 for (i = s->mjpb_skiptosod; i > 0; i--)
1416 skip_bits(&s->gb, 8);
1419 for (i = 0; i < nb_components; i++)
1420 s->last_dc[i] = (4 << s->bits);
1423 av_assert0(s->picture_ptr == s->picture);
1424 if (CONFIG_JPEGLS_DECODER && s->ls) {
1426 // reset_ls_coding_parameters(s, 0);
1428 if ((ret = ff_jpegls_decode_picture(s, predictor,
1429 point_transform, ilv)) < 0)
1433 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1436 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1438 nb_components)) < 0)
1443 if (s->progressive && predictor) {
1444 av_assert0(s->picture_ptr == s->picture);
1445 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1447 point_transform)) < 0)
1450 if ((ret = mjpeg_decode_scan(s, nb_components,
1451 prev_shift, point_transform,
1452 mb_bitmask, mb_bitmask_size, reference)) < 0)
1457 if (s->interlaced &&
1458 get_bits_left(&s->gb) > 32 &&
1459 show_bits(&s->gb, 8) == 0xFF) {
1460 GetBitContext bak = s->gb;
1461 align_get_bits(&bak);
1462 if (show_bits(&bak, 16) == 0xFFD1) {
1463 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1465 skip_bits(&s->gb, 16);
1466 s->bottom_field ^= 1;
1475 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1476 return AVERROR_INVALIDDATA;
1479 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1481 if (get_bits(&s->gb, 16) != 4)
1482 return AVERROR_INVALIDDATA;
1483 s->restart_interval = get_bits(&s->gb, 16);
1484 s->restart_count = 0;
1485 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1486 s->restart_interval);
1491 static int mjpeg_decode_app(MJpegDecodeContext *s)
1495 len = get_bits(&s->gb, 16);
1497 return AVERROR_INVALIDDATA;
1498 if (8 * len > get_bits_left(&s->gb))
1499 return AVERROR_INVALIDDATA;
1501 id = get_bits_long(&s->gb, 32);
1504 if (s->avctx->debug & FF_DEBUG_STARTCODE) {
1506 av_get_codec_tag_string(id_str, sizeof(id_str), av_bswap32(id));
1507 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n", id_str, id, len);
1510 /* Buggy AVID, it puts EOI only at every 10th frame. */
1511 /* Also, this fourcc is used by non-avid files too, it holds some
1512 information, but it's always present in AVID-created files. */
1513 if (id == AV_RB32("AVI1")) {
1519 4bytes field_size_less_padding
1522 i = get_bits(&s->gb, 8); len--;
1523 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1525 skip_bits(&s->gb, 8);
1526 skip_bits(&s->gb, 32);
1527 skip_bits(&s->gb, 32);
1535 if (id == AV_RB32("JFIF")) {
1536 int t_w, t_h, v1, v2;
1537 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1538 v1 = get_bits(&s->gb, 8);
1539 v2 = get_bits(&s->gb, 8);
1540 skip_bits(&s->gb, 8);
1542 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1543 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1545 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1546 av_log(s->avctx, AV_LOG_INFO,
1547 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1549 s->avctx->sample_aspect_ratio.num,
1550 s->avctx->sample_aspect_ratio.den);
1552 t_w = get_bits(&s->gb, 8);
1553 t_h = get_bits(&s->gb, 8);
1555 /* skip thumbnail */
1556 if (len -10 - (t_w * t_h * 3) > 0)
1557 len -= t_w * t_h * 3;
1563 if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1564 skip_bits(&s->gb, 16); /* version */
1565 skip_bits(&s->gb, 16); /* flags0 */
1566 skip_bits(&s->gb, 16); /* flags1 */
1567 s->adobe_transform = get_bits(&s->gb, 8);
1568 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1569 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1574 if (id == AV_RB32("LJIF")) {
1575 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1576 av_log(s->avctx, AV_LOG_INFO,
1577 "Pegasus lossless jpeg header found\n");
1578 skip_bits(&s->gb, 16); /* version ? */
1579 skip_bits(&s->gb, 16); /* unknown always 0? */
1580 skip_bits(&s->gb, 16); /* unknown always 0? */
1581 skip_bits(&s->gb, 16); /* unknown always 0? */
1582 switch (i=get_bits(&s->gb, 8)) {
1592 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1597 if (id == AV_RL32("colr") && len > 0) {
1598 s->colr = get_bits(&s->gb, 8);
1599 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1600 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1604 if (id == AV_RL32("xfrm") && len > 0) {
1605 s->xfrm = get_bits(&s->gb, 8);
1606 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1607 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1612 /* JPS extension by VRex */
1613 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1614 int flags, layout, type;
1615 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1616 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1618 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1619 skip_bits(&s->gb, 16); len -= 2; /* block length */
1620 skip_bits(&s->gb, 8); /* reserved */
1621 flags = get_bits(&s->gb, 8);
1622 layout = get_bits(&s->gb, 8);
1623 type = get_bits(&s->gb, 8);
1626 s->stereo3d = av_stereo3d_alloc();
1631 s->stereo3d->type = AV_STEREO3D_2D;
1632 } else if (type == 1) {
1635 s->stereo3d->type = AV_STEREO3D_LINES;
1638 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1641 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1644 if (!(flags & 0x04)) {
1645 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1652 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1653 GetByteContext gbytes;
1654 int ret, le, ifd_offset, bytes_read;
1655 const uint8_t *aligned;
1657 skip_bits(&s->gb, 16); // skip padding
1660 // init byte wise reading
1661 aligned = align_get_bits(&s->gb);
1662 bytestream2_init(&gbytes, aligned, len);
1665 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1667 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1669 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1671 // read 0th IFD and store the metadata
1672 // (return values > 0 indicate the presence of subimage metadata)
1673 ret = avpriv_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1675 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1679 bytes_read = bytestream2_tell(&gbytes);
1680 skip_bits(&s->gb, bytes_read << 3);
1687 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1688 id = get_bits_long(&s->gb, 32);
1691 if (id == AV_RB32("mjpg")) {
1693 skip_bits(&s->gb, 32); /* field size */
1694 skip_bits(&s->gb, 32); /* pad field size */
1695 skip_bits(&s->gb, 32); /* next off */
1696 skip_bits(&s->gb, 32); /* quant off */
1697 skip_bits(&s->gb, 32); /* huff off */
1698 skip_bits(&s->gb, 32); /* image off */
1699 skip_bits(&s->gb, 32); /* scan off */
1700 skip_bits(&s->gb, 32); /* data off */
1702 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1703 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1708 /* slow but needed for extreme adobe jpegs */
1710 av_log(s->avctx, AV_LOG_ERROR,
1711 "mjpeg: error, decode_app parser read over the end\n");
1713 skip_bits(&s->gb, 8);
1718 static int mjpeg_decode_com(MJpegDecodeContext *s)
1720 int len = get_bits(&s->gb, 16);
1721 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1722 char *cbuf = av_malloc(len - 1);
1725 for (i = 0; i < len - 2; i++)
1726 cbuf[i] = get_bits(&s->gb, 8);
1727 if (i > 0 && cbuf[i - 1] == '\n')
1732 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1733 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1735 /* buggy avid, it puts EOI only at every 10th frame */
1736 if (!strncmp(cbuf, "AVID", 4)) {
1737 parse_avid(s, cbuf, len);
1738 } else if (!strcmp(cbuf, "CS=ITU601"))
1740 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32)) ||
1741 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1751 /* return the 8 bit start code value and update the search
1752 state. Return -1 if no start code found */
1753 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1755 const uint8_t *buf_ptr;
1760 buf_ptr = *pbuf_ptr;
1761 while (buf_end - buf_ptr > 1) {
1764 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1773 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1774 *pbuf_ptr = buf_ptr;
1778 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1779 const uint8_t **buf_ptr, const uint8_t *buf_end,
1780 const uint8_t **unescaped_buf_ptr,
1781 int *unescaped_buf_size)
1784 start_code = find_marker(buf_ptr, buf_end);
1786 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1788 return AVERROR(ENOMEM);
1790 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1791 if (start_code == SOS && !s->ls) {
1792 const uint8_t *src = *buf_ptr;
1793 uint8_t *dst = s->buffer;
1795 while (src < buf_end) {
1796 uint8_t x = *(src++);
1799 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1801 while (src < buf_end && x == 0xff)
1804 if (x >= 0xd0 && x <= 0xd7)
1811 *unescaped_buf_ptr = s->buffer;
1812 *unescaped_buf_size = dst - s->buffer;
1813 memset(s->buffer + *unescaped_buf_size, 0,
1814 FF_INPUT_BUFFER_PADDING_SIZE);
1816 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
1817 (buf_end - *buf_ptr) - (dst - s->buffer));
1818 } else if (start_code == SOS && s->ls) {
1819 const uint8_t *src = *buf_ptr;
1820 uint8_t *dst = s->buffer;
1826 while (src + t < buf_end) {
1827 uint8_t x = src[t++];
1829 while ((src + t < buf_end) && x == 0xff)
1838 init_put_bits(&pb, dst, t);
1840 /* unescape bitstream */
1842 uint8_t x = src[b++];
1843 put_bits(&pb, 8, x);
1846 put_bits(&pb, 7, x);
1850 flush_put_bits(&pb);
1852 *unescaped_buf_ptr = dst;
1853 *unescaped_buf_size = (bit_count + 7) >> 3;
1854 memset(s->buffer + *unescaped_buf_size, 0,
1855 FF_INPUT_BUFFER_PADDING_SIZE);
1857 *unescaped_buf_ptr = *buf_ptr;
1858 *unescaped_buf_size = buf_end - *buf_ptr;
1864 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1867 AVFrame *frame = data;
1868 const uint8_t *buf = avpkt->data;
1869 int buf_size = avpkt->size;
1870 MJpegDecodeContext *s = avctx->priv_data;
1871 const uint8_t *buf_end, *buf_ptr;
1872 const uint8_t *unescaped_buf_ptr;
1874 int unescaped_buf_size;
1879 av_dict_free(&s->exif_metadata);
1880 av_freep(&s->stereo3d);
1881 s->adobe_transform = -1;
1884 buf_end = buf + buf_size;
1885 while (buf_ptr < buf_end) {
1886 /* find start next marker */
1887 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1889 &unescaped_buf_size);
1891 if (start_code < 0) {
1893 } else if (unescaped_buf_size > INT_MAX / 8) {
1894 av_log(avctx, AV_LOG_ERROR,
1895 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1896 start_code, unescaped_buf_size, buf_size);
1897 return AVERROR_INVALIDDATA;
1899 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
1900 start_code, buf_end - buf_ptr);
1902 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
1905 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
1909 s->start_code = start_code;
1910 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1911 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1913 /* process markers */
1914 if (start_code >= 0xd0 && start_code <= 0xd7)
1915 av_log(avctx, AV_LOG_DEBUG,
1916 "restart marker: %d\n", start_code & 0x0f);
1918 else if (start_code >= APP0 && start_code <= APP15)
1919 mjpeg_decode_app(s);
1921 else if (start_code == COM)
1922 mjpeg_decode_com(s);
1926 if (!CONFIG_JPEGLS_DECODER &&
1927 (start_code == SOF48 || start_code == LSE)) {
1928 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
1929 return AVERROR(ENOSYS);
1932 switch (start_code) {
1934 s->restart_interval = 0;
1935 s->restart_count = 0;
1936 /* nothing to do on SOI */
1939 ff_mjpeg_decode_dqt(s);
1942 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1943 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1952 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1959 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1966 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1973 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1977 if (!CONFIG_JPEGLS_DECODER ||
1978 (ret = ff_jpegls_decode_lse(s)) < 0)
1984 if (!s->got_picture) {
1985 av_log(avctx, AV_LOG_WARNING,
1986 "Found EOI before any SOF, ignoring\n");
1989 if (s->interlaced) {
1990 s->bottom_field ^= 1;
1991 /* if not bottom field, do not output image yet */
1992 if (s->bottom_field == !s->interlace_polarity)
1995 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2001 int qp = FFMAX3(s->qscale[0],
2004 int qpw = (s->width + 15) / 16;
2005 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2007 memset(qp_table_buf->data, qp, qpw);
2008 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2011 if(avctx->debug & FF_DEBUG_QP)
2012 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2018 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2019 (avctx->err_recognition & AV_EF_EXPLODE))
2023 mjpeg_decode_dri(s);
2035 av_log(avctx, AV_LOG_ERROR,
2036 "mjpeg: unsupported coding type (%x)\n", start_code);
2040 /* eof process start code */
2041 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2042 av_log(avctx, AV_LOG_DEBUG,
2043 "marker parser used %d bytes (%d bits)\n",
2044 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2046 if (s->got_picture && s->cur_scan) {
2047 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2050 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2051 return AVERROR_INVALIDDATA;
2058 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2059 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2060 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2061 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2062 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2063 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2065 for (p = 1; p<4; p++) {
2066 uint8_t *line = s->picture_ptr->data[p];
2067 if (!(s->upscale_h & (1<<p)))
2069 for (i = 0; i < s->chroma_height; i++) {
2070 for (index = s->width - 1; index; index--)
2071 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2072 line += s->linesize[p];
2078 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2079 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2080 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2081 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2082 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2083 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2085 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2086 for (p = 1; p < 4; p++) {
2087 uint8_t *dst = &((uint8_t *)s->picture_ptr->data[p])[(s->height - 1) * s->linesize[p]];
2089 if (!(s->upscale_v & (1<<p)))
2091 w = s->width >> hshift;
2092 for (i = s->height - 1; i; i--) {
2093 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2094 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2096 memcpy(dst, src1, w);
2098 for (index = 0; index < w; index++)
2099 dst[index] = (src1[index] + src2[index]) >> 1;
2101 dst -= s->linesize[p];
2107 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2108 for (index=0; index<4; index++) {
2109 uint8_t *dst = s->picture_ptr->data[index];
2110 int w = s->picture_ptr->width;
2111 int h = s->picture_ptr->height;
2112 if(index && index<3){
2113 w = FF_CEIL_RSHIFT(w, hshift);
2114 h = FF_CEIL_RSHIFT(h, vshift);
2117 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2118 for (i=0; i<h/2; i++) {
2120 FFSWAP(int, dst[j], dst2[j]);
2121 dst += s->picture_ptr->linesize[index];
2122 dst2 -= s->picture_ptr->linesize[index];
2127 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2128 int w = s->picture_ptr->width;
2129 int h = s->picture_ptr->height;
2130 for (i=0; i<h; i++) {
2133 for (index=0; index<4; index++) {
2134 dst[index] = s->picture_ptr->data[index]
2135 + s->picture_ptr->linesize[index]*i;
2137 for (j=0; j<w; j++) {
2139 int r = dst[0][j] * k;
2140 int g = dst[1][j] * k;
2141 int b = dst[2][j] * k;
2142 dst[0][j] = g*257 >> 16;
2143 dst[1][j] = b*257 >> 16;
2144 dst[2][j] = r*257 >> 16;
2149 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2150 int w = s->picture_ptr->width;
2151 int h = s->picture_ptr->height;
2152 for (i=0; i<h; i++) {
2155 for (index=0; index<4; index++) {
2156 dst[index] = s->picture_ptr->data[index]
2157 + s->picture_ptr->linesize[index]*i;
2159 for (j=0; j<w; j++) {
2161 int r = (255 - dst[0][j]) * k;
2162 int g = (128 - dst[1][j]) * k;
2163 int b = (128 - dst[2][j]) * k;
2164 dst[0][j] = r*257 >> 16;
2165 dst[1][j] = (g*257 >> 16) + 128;
2166 dst[2][j] = (b*257 >> 16) + 128;
2173 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2175 stereo->type = s->stereo3d->type;
2176 stereo->flags = s->stereo3d->flags;
2178 av_freep(&s->stereo3d);
2181 av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
2182 av_dict_free(&s->exif_metadata);
2184 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2186 // return buf_end - buf_ptr;
2187 return buf_ptr - buf;
2190 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2192 MJpegDecodeContext *s = avctx->priv_data;
2195 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2196 av_log(avctx, AV_LOG_INFO, "Single field\n");
2200 av_frame_free(&s->picture);
2201 s->picture_ptr = NULL;
2202 } else if (s->picture_ptr)
2203 av_frame_unref(s->picture_ptr);
2205 av_freep(&s->buffer);
2206 av_freep(&s->stereo3d);
2207 av_freep(&s->ljpeg_buffer);
2208 s->ljpeg_buffer_size = 0;
2210 for (i = 0; i < 3; i++) {
2211 for (j = 0; j < 4; j++)
2212 ff_free_vlc(&s->vlcs[i][j]);
2214 for (i = 0; i < MAX_COMPONENTS; i++) {
2215 av_freep(&s->blocks[i]);
2216 av_freep(&s->last_nnz[i]);
2218 av_dict_free(&s->exif_metadata);
2222 static void decode_flush(AVCodecContext *avctx)
2224 MJpegDecodeContext *s = avctx->priv_data;
2228 #if CONFIG_MJPEG_DECODER
2229 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2230 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2231 static const AVOption options[] = {
2232 { "extern_huff", "Use external huffman table.",
2233 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
2237 static const AVClass mjpegdec_class = {
2238 .class_name = "MJPEG decoder",
2239 .item_name = av_default_item_name,
2241 .version = LIBAVUTIL_VERSION_INT,
2244 AVCodec ff_mjpeg_decoder = {
2246 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2247 .type = AVMEDIA_TYPE_VIDEO,
2248 .id = AV_CODEC_ID_MJPEG,
2249 .priv_data_size = sizeof(MJpegDecodeContext),
2250 .init = ff_mjpeg_decode_init,
2251 .close = ff_mjpeg_decode_end,
2252 .decode = ff_mjpeg_decode_frame,
2253 .flush = decode_flush,
2254 .capabilities = CODEC_CAP_DR1,
2256 .priv_class = &mjpegdec_class,
2259 #if CONFIG_THP_DECODER
2260 AVCodec ff_thp_decoder = {
2262 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2263 .type = AVMEDIA_TYPE_VIDEO,
2264 .id = AV_CODEC_ID_THP,
2265 .priv_data_size = sizeof(MJpegDecodeContext),
2266 .init = ff_mjpeg_decode_init,
2267 .close = ff_mjpeg_decode_end,
2268 .decode = ff_mjpeg_decode_frame,
2269 .flush = decode_flush,
2270 .capabilities = CODEC_CAP_DR1,