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);
498 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
499 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
500 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
501 if (pix_fmt_id == 0x42111100) {
503 s->chroma_height = s->height / 2;
507 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
510 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
514 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
515 return AVERROR_PATCHWELCOME;
517 if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
518 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
519 return AVERROR_PATCHWELCOME;
522 s->upscale_h = s->upscale_v = 0;
523 if (s->nb_components > 1)
524 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
525 else if (s->palette_index && s->bits <= 8)
526 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
527 else if (s->bits <= 8)
528 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
530 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
533 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
535 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
539 av_frame_unref(s->picture_ptr);
540 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
542 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
543 s->picture_ptr->key_frame = 1;
546 for (i = 0; i < 4; i++)
547 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
549 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
550 s->width, s->height, s->linesize[0], s->linesize[1],
551 s->interlaced, s->avctx->height);
553 if (len != (8 + (3 * nb_components)))
554 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
557 if (s->rgb && !s->lossless && !s->ls) {
558 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
559 return AVERROR_PATCHWELCOME;
562 /* totally blank picture as progressive JPEG will only add details to it */
563 if (s->progressive) {
564 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
565 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
566 for (i = 0; i < s->nb_components; i++) {
567 int size = bw * bh * s->h_count[i] * s->v_count[i];
568 av_freep(&s->blocks[i]);
569 av_freep(&s->last_nnz[i]);
570 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
571 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
572 if (!s->blocks[i] || !s->last_nnz[i])
573 return AVERROR(ENOMEM);
574 s->block_stride[i] = bw * s->h_count[i];
576 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
581 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
584 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
585 if (code < 0 || code > 16) {
586 av_log(s->avctx, AV_LOG_WARNING,
587 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
588 0, dc_index, &s->vlcs[0][dc_index]);
593 return get_xbits(&s->gb, code);
598 /* decode block and dequantize */
599 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
600 int dc_index, int ac_index, int16_t *quant_matrix)
602 int code, i, j, level, val;
605 val = mjpeg_decode_dc(s, dc_index);
606 if (val == 0xfffff) {
607 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
608 return AVERROR_INVALIDDATA;
610 val = val * quant_matrix[0] + s->last_dc[component];
611 s->last_dc[component] = val;
615 {OPEN_READER(re, &s->gb);
617 UPDATE_CACHE(re, &s->gb);
618 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
620 i += ((unsigned)code) >> 4;
623 if (code > MIN_CACHE_BITS - 16)
624 UPDATE_CACHE(re, &s->gb);
627 int cache = GET_CACHE(re, &s->gb);
628 int sign = (~cache) >> 31;
629 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
632 LAST_SKIP_BITS(re, &s->gb, code);
635 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
636 return AVERROR_INVALIDDATA;
638 j = s->scantable.permutated[i];
639 block[j] = level * quant_matrix[j];
642 CLOSE_READER(re, &s->gb);}
647 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
648 int component, int dc_index,
649 int16_t *quant_matrix, int Al)
652 s->dsp.clear_block(block);
653 val = mjpeg_decode_dc(s, dc_index);
654 if (val == 0xfffff) {
655 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
656 return AVERROR_INVALIDDATA;
658 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
659 s->last_dc[component] = val;
664 /* decode block and dequantize - progressive JPEG version */
665 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
666 uint8_t *last_nnz, int ac_index,
667 int16_t *quant_matrix,
668 int ss, int se, int Al, int *EOBRUN)
670 int code, i, j, level, val, run;
678 OPEN_READER(re, &s->gb);
679 for (i = ss; ; i++) {
680 UPDATE_CACHE(re, &s->gb);
681 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
683 run = ((unsigned) code) >> 4;
687 if (code > MIN_CACHE_BITS - 16)
688 UPDATE_CACHE(re, &s->gb);
691 int cache = GET_CACHE(re, &s->gb);
692 int sign = (~cache) >> 31;
693 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
696 LAST_SKIP_BITS(re, &s->gb, code);
700 j = s->scantable.permutated[se];
701 block[j] = level * quant_matrix[j] << Al;
704 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
705 return AVERROR_INVALIDDATA;
707 j = s->scantable.permutated[i];
708 block[j] = level * quant_matrix[j] << Al;
710 if (run == 0xF) {// ZRL - skip 15 coefficients
713 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
714 return AVERROR_INVALIDDATA;
719 UPDATE_CACHE(re, &s->gb);
720 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
721 LAST_SKIP_BITS(re, &s->gb, run);
728 CLOSE_READER(re, &s->gb);
737 #define REFINE_BIT(j) { \
738 UPDATE_CACHE(re, &s->gb); \
739 sign = block[j] >> 15; \
740 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
741 ((quant_matrix[j] ^ sign) - sign) << Al; \
742 LAST_SKIP_BITS(re, &s->gb, 1); \
750 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
755 j = s->scantable.permutated[i]; \
758 else if (run-- == 0) \
762 /* decode block and dequantize - progressive JPEG refinement pass */
763 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
765 int ac_index, int16_t *quant_matrix,
766 int ss, int se, int Al, int *EOBRUN)
768 int code, i = ss, j, sign, val, run;
769 int last = FFMIN(se, *last_nnz);
771 OPEN_READER(re, &s->gb);
776 UPDATE_CACHE(re, &s->gb);
777 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
780 run = ((unsigned) code) >> 4;
781 UPDATE_CACHE(re, &s->gb);
782 val = SHOW_UBITS(re, &s->gb, 1);
783 LAST_SKIP_BITS(re, &s->gb, 1);
785 j = s->scantable.permutated[i];
787 block[j] = ((quant_matrix[j]^val) - val) << Al;
791 CLOSE_READER(re, &s->gb);
795 run = ((unsigned) code) >> 4;
802 UPDATE_CACHE(re, &s->gb);
803 run += SHOW_UBITS(re, &s->gb, val);
804 LAST_SKIP_BITS(re, &s->gb, val);
816 for (; i <= last; i++) {
817 j = s->scantable.permutated[i];
821 CLOSE_READER(re, &s->gb);
828 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
833 if (s->restart_interval) {
835 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
836 align_get_bits(&s->gb);
837 for (i = 0; i < nb_components; i++) /* reset dc */
838 s->last_dc[i] = (4 << s->bits);
841 i = 8 + ((-get_bits_count(&s->gb)) & 7);
843 if (s->restart_count == 0) {
844 if( show_bits(&s->gb, i) == (1 << i) - 1
845 || show_bits(&s->gb, i) == 0xFF) {
846 int pos = get_bits_count(&s->gb);
847 align_get_bits(&s->gb);
848 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
849 skip_bits(&s->gb, 8);
850 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
851 for (i = 0; i < nb_components; i++) /* reset dc */
852 s->last_dc[i] = (4 << s->bits);
855 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
862 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
865 uint16_t (*buffer)[4];
866 int left[4], top[4], topleft[4];
867 const int linesize = s->linesize[0];
868 const int mask = ((1 << s->bits) - 1) << point_transform;
872 if (s->nb_components != 3 && s->nb_components != 4)
873 return AVERROR_INVALIDDATA;
874 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
875 return AVERROR_INVALIDDATA;
878 s->restart_count = s->restart_interval;
880 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
881 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
882 buffer = s->ljpeg_buffer;
884 for (i = 0; i < 4; i++)
885 buffer[0][i] = 1 << (s->bits - 1);
887 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
888 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
890 if (s->interlaced && s->bottom_field)
891 ptr += linesize >> 1;
893 for (i = 0; i < 4; i++)
894 top[i] = left[i] = topleft[i] = buffer[0][i];
896 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
897 int modified_predictor = predictor;
899 if (s->restart_interval && !s->restart_count){
900 s->restart_count = s->restart_interval;
904 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
906 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
907 modified_predictor = 1;
909 for (i=0;i<nb_components;i++) {
913 top[i] = buffer[mb_x][i];
915 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
917 dc = mjpeg_decode_dc(s, s->dc_index[i]);
921 left[i] = buffer[mb_x][i] =
922 mask & (pred + (dc << point_transform));
925 if (s->restart_interval && !--s->restart_count) {
926 align_get_bits(&s->gb);
927 skip_bits(&s->gb, 16); /* skip RSTn */
930 if (s->nb_components == 4) {
931 for(i=0; i<nb_components; i++) {
932 int c= s->comp_index[i];
934 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
935 ptr[4*mb_x+3-c] = buffer[mb_x][i];
937 } else if(s->bits == 9) {
938 return AVERROR_PATCHWELCOME;
940 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
941 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
946 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
947 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
948 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
949 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
951 } else if (s->pegasus_rct) {
952 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
953 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
954 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
955 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
958 for(i=0; i<nb_components; i++) {
959 int c= s->comp_index[i];
961 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
962 ptr[3*mb_x+2-c] = buffer[mb_x][i];
964 } else if(s->bits == 9) {
965 return AVERROR_PATCHWELCOME;
967 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
968 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
977 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
978 int point_transform, int nb_components)
980 int i, mb_x, mb_y, mask;
981 int bits= (s->bits+7)&~7;
985 point_transform += bits - s->bits;
986 mask = ((1 << s->bits) - 1) << point_transform;
988 av_assert0(nb_components>=1 && nb_components<=4);
990 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
991 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
992 if (s->restart_interval && !s->restart_count){
993 s->restart_count = s->restart_interval;
998 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
999 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1000 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1001 for (i = 0; i < nb_components; i++) {
1004 int n, h, v, x, y, c, j, linesize;
1005 n = s->nb_blocks[i];
1006 c = s->comp_index[i];
1011 linesize= s->linesize[c];
1013 if(bits>8) linesize /= 2;
1015 for(j=0; j<n; j++) {
1018 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1022 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1024 if(x==0 && leftcol){
1025 pred= 1 << (bits - 1);
1030 if(x==0 && leftcol){
1031 pred= ptr[-linesize];
1033 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1037 if (s->interlaced && s->bottom_field)
1038 ptr += linesize >> 1;
1040 *ptr= pred + (dc << point_transform);
1042 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1044 if(x==0 && leftcol){
1045 pred= 1 << (bits - 1);
1050 if(x==0 && leftcol){
1051 pred= ptr16[-linesize];
1053 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1057 if (s->interlaced && s->bottom_field)
1058 ptr16 += linesize >> 1;
1060 *ptr16= pred + (dc << point_transform);
1069 for (i = 0; i < nb_components; i++) {
1072 int n, h, v, x, y, c, j, linesize, dc;
1073 n = s->nb_blocks[i];
1074 c = s->comp_index[i];
1079 linesize = s->linesize[c];
1081 if(bits>8) linesize /= 2;
1083 for (j = 0; j < n; j++) {
1086 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1090 ptr = s->picture_ptr->data[c] +
1091 (linesize * (v * mb_y + y)) +
1092 (h * mb_x + x); //FIXME optimize this crap
1093 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1096 *ptr = pred + (dc << point_transform);
1098 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1099 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1102 *ptr16= pred + (dc << point_transform);
1112 if (s->restart_interval && !--s->restart_count) {
1113 align_get_bits(&s->gb);
1114 skip_bits(&s->gb, 16); /* skip RSTn */
1121 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1122 uint8_t *dst, const uint8_t *src,
1123 int linesize, int lowres)
1126 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1128 case 1: copy_block4(dst, src, linesize, linesize, 4);
1130 case 2: copy_block2(dst, src, linesize, linesize, 2);
1132 case 3: *dst = *src;
1137 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1139 int block_x, block_y;
1140 int size = 8 >> s->avctx->lowres;
1142 for (block_y=0; block_y<size; block_y++)
1143 for (block_x=0; block_x<size; block_x++)
1144 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1146 for (block_y=0; block_y<size; block_y++)
1147 for (block_x=0; block_x<size; block_x++)
1148 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1152 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1153 int Al, const uint8_t *mb_bitmask,
1154 int mb_bitmask_size,
1155 const AVFrame *reference)
1158 uint8_t *data[MAX_COMPONENTS];
1159 const uint8_t *reference_data[MAX_COMPONENTS];
1160 int linesize[MAX_COMPONENTS];
1161 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1162 int bytes_per_pixel = 1 + (s->bits > 8);
1165 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1166 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1167 return AVERROR_INVALIDDATA;
1169 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1172 s->restart_count = 0;
1174 for (i = 0; i < nb_components; i++) {
1175 int c = s->comp_index[i];
1176 data[c] = s->picture_ptr->data[c];
1177 reference_data[c] = reference ? reference->data[c] : NULL;
1178 linesize[c] = s->linesize[c];
1179 s->coefs_finished[c] |= 1;
1182 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1183 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1184 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1186 if (s->restart_interval && !s->restart_count)
1187 s->restart_count = s->restart_interval;
1189 if (get_bits_left(&s->gb) < 0) {
1190 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1191 -get_bits_left(&s->gb));
1192 return AVERROR_INVALIDDATA;
1194 for (i = 0; i < nb_components; i++) {
1196 int n, h, v, x, y, c, j;
1198 n = s->nb_blocks[i];
1199 c = s->comp_index[i];
1204 for (j = 0; j < n; j++) {
1205 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1206 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1208 if (s->interlaced && s->bottom_field)
1209 block_offset += linesize[c] >> 1;
1210 ptr = data[c] + block_offset;
1211 if (!s->progressive) {
1213 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1214 linesize[c], s->avctx->lowres);
1217 s->dsp.clear_block(s->block);
1218 if (decode_block(s, s->block, i,
1219 s->dc_index[i], s->ac_index[i],
1220 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1221 av_log(s->avctx, AV_LOG_ERROR,
1222 "error y=%d x=%d\n", mb_y, mb_x);
1223 return AVERROR_INVALIDDATA;
1225 s->dsp.idct_put(ptr, linesize[c], s->block);
1227 shift_output(s, ptr, linesize[c]);
1230 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1232 int16_t *block = s->blocks[c][block_idx];
1234 block[0] += get_bits1(&s->gb) *
1235 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1236 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1237 s->quant_matrixes[s->quant_sindex[i]],
1239 av_log(s->avctx, AV_LOG_ERROR,
1240 "error y=%d x=%d\n", mb_y, mb_x);
1241 return AVERROR_INVALIDDATA;
1244 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1245 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1246 mb_x, mb_y, x, y, c, s->bottom_field,
1247 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1255 handle_rstn(s, nb_components);
1261 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1262 int se, int Ah, int Al)
1266 int c = s->comp_index[0];
1267 uint8_t *data = s->picture_ptr->data[c];
1268 int linesize = s->linesize[c];
1270 int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1271 int bytes_per_pixel = 1 + (s->bits > 8);
1273 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1274 if (se < ss || se > 63) {
1275 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1276 return AVERROR_INVALIDDATA;
1280 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1281 last_scan = !~s->coefs_finished[c];
1284 if (s->interlaced && s->bottom_field)
1285 data += linesize >> 1;
1287 s->restart_count = 0;
1289 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1290 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1291 int block_idx = mb_y * s->block_stride[c];
1292 int16_t (*block)[64] = &s->blocks[c][block_idx];
1293 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1294 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1296 if (s->restart_interval && !s->restart_count)
1297 s->restart_count = s->restart_interval;
1300 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1301 quant_matrix, ss, se, Al, &EOBRUN);
1303 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1304 quant_matrix, ss, se, Al, &EOBRUN);
1306 av_log(s->avctx, AV_LOG_ERROR,
1307 "error y=%d x=%d\n", mb_y, mb_x);
1308 return AVERROR_INVALIDDATA;
1312 s->dsp.idct_put(ptr, linesize, *block);
1314 shift_output(s, ptr, linesize);
1315 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1317 if (handle_rstn(s, 0))
1324 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1325 int mb_bitmask_size, const AVFrame *reference)
1327 int len, nb_components, i, h, v, predictor, point_transform;
1329 const int block_size = s->lossless ? 1 : 8;
1330 int ilv, prev_shift;
1332 if (!s->got_picture) {
1333 av_log(s->avctx, AV_LOG_WARNING,
1334 "Can not process SOS before SOF, skipping\n");
1338 av_assert0(s->picture_ptr->data[0]);
1339 /* XXX: verify len field validity */
1340 len = get_bits(&s->gb, 16);
1341 nb_components = get_bits(&s->gb, 8);
1342 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1343 av_log(s->avctx, AV_LOG_ERROR,
1344 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1345 return AVERROR_PATCHWELCOME;
1347 if (len != 6 + 2 * nb_components) {
1348 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1349 return AVERROR_INVALIDDATA;
1351 for (i = 0; i < nb_components; i++) {
1352 id = get_bits(&s->gb, 8) - 1;
1353 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1354 /* find component index */
1355 for (index = 0; index < s->nb_components; index++)
1356 if (id == s->component_id[index])
1358 if (index == s->nb_components) {
1359 av_log(s->avctx, AV_LOG_ERROR,
1360 "decode_sos: index(%d) out of components\n", index);
1361 return AVERROR_INVALIDDATA;
1363 /* Metasoft MJPEG codec has Cb and Cr swapped */
1364 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1365 && nb_components == 3 && s->nb_components == 3 && i)
1368 s->quant_sindex[i] = s->quant_index[index];
1369 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1370 s->h_scount[i] = s->h_count[index];
1371 s->v_scount[i] = s->v_count[index];
1373 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1375 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1376 index = (index+2)%3;
1378 s->comp_index[i] = index;
1380 s->dc_index[i] = get_bits(&s->gb, 4);
1381 s->ac_index[i] = get_bits(&s->gb, 4);
1383 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1384 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1386 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))
1390 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1391 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1392 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1393 prev_shift = get_bits(&s->gb, 4); /* Ah */
1394 point_transform = get_bits(&s->gb, 4); /* Al */
1396 prev_shift = point_transform = 0;
1398 if (nb_components > 1) {
1399 /* interleaved stream */
1400 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1401 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1402 } else if (!s->ls) { /* skip this for JPEG-LS */
1403 h = s->h_max / s->h_scount[0];
1404 v = s->v_max / s->v_scount[0];
1405 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1406 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1407 s->nb_blocks[0] = 1;
1412 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1413 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1414 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1415 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1416 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1419 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1420 for (i = s->mjpb_skiptosod; i > 0; i--)
1421 skip_bits(&s->gb, 8);
1424 for (i = 0; i < nb_components; i++)
1425 s->last_dc[i] = (4 << s->bits);
1428 av_assert0(s->picture_ptr == s->picture);
1429 if (CONFIG_JPEGLS_DECODER && s->ls) {
1431 // reset_ls_coding_parameters(s, 0);
1433 if ((ret = ff_jpegls_decode_picture(s, predictor,
1434 point_transform, ilv)) < 0)
1438 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1441 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1443 nb_components)) < 0)
1448 if (s->progressive && predictor) {
1449 av_assert0(s->picture_ptr == s->picture);
1450 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1452 point_transform)) < 0)
1455 if ((ret = mjpeg_decode_scan(s, nb_components,
1456 prev_shift, point_transform,
1457 mb_bitmask, mb_bitmask_size, reference)) < 0)
1462 if (s->interlaced &&
1463 get_bits_left(&s->gb) > 32 &&
1464 show_bits(&s->gb, 8) == 0xFF) {
1465 GetBitContext bak = s->gb;
1466 align_get_bits(&bak);
1467 if (show_bits(&bak, 16) == 0xFFD1) {
1468 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1470 skip_bits(&s->gb, 16);
1471 s->bottom_field ^= 1;
1480 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1481 return AVERROR_INVALIDDATA;
1484 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1486 if (get_bits(&s->gb, 16) != 4)
1487 return AVERROR_INVALIDDATA;
1488 s->restart_interval = get_bits(&s->gb, 16);
1489 s->restart_count = 0;
1490 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1491 s->restart_interval);
1496 static int mjpeg_decode_app(MJpegDecodeContext *s)
1500 len = get_bits(&s->gb, 16);
1502 return AVERROR_INVALIDDATA;
1503 if (8 * len > get_bits_left(&s->gb))
1504 return AVERROR_INVALIDDATA;
1506 id = get_bits_long(&s->gb, 32);
1509 if (s->avctx->debug & FF_DEBUG_STARTCODE) {
1511 av_get_codec_tag_string(id_str, sizeof(id_str), av_bswap32(id));
1512 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n", id_str, id, len);
1515 /* Buggy AVID, it puts EOI only at every 10th frame. */
1516 /* Also, this fourcc is used by non-avid files too, it holds some
1517 information, but it's always present in AVID-created files. */
1518 if (id == AV_RB32("AVI1")) {
1524 4bytes field_size_less_padding
1527 i = get_bits(&s->gb, 8); len--;
1528 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1530 skip_bits(&s->gb, 8);
1531 skip_bits(&s->gb, 32);
1532 skip_bits(&s->gb, 32);
1540 if (id == AV_RB32("JFIF")) {
1541 int t_w, t_h, v1, v2;
1542 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1543 v1 = get_bits(&s->gb, 8);
1544 v2 = get_bits(&s->gb, 8);
1545 skip_bits(&s->gb, 8);
1547 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1548 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1550 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1551 av_log(s->avctx, AV_LOG_INFO,
1552 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1554 s->avctx->sample_aspect_ratio.num,
1555 s->avctx->sample_aspect_ratio.den);
1557 t_w = get_bits(&s->gb, 8);
1558 t_h = get_bits(&s->gb, 8);
1560 /* skip thumbnail */
1561 if (len -10 - (t_w * t_h * 3) > 0)
1562 len -= t_w * t_h * 3;
1568 if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1569 skip_bits(&s->gb, 16); /* version */
1570 skip_bits(&s->gb, 16); /* flags0 */
1571 skip_bits(&s->gb, 16); /* flags1 */
1572 s->adobe_transform = get_bits(&s->gb, 8);
1573 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1574 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1579 if (id == AV_RB32("LJIF")) {
1580 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1581 av_log(s->avctx, AV_LOG_INFO,
1582 "Pegasus lossless jpeg header found\n");
1583 skip_bits(&s->gb, 16); /* version ? */
1584 skip_bits(&s->gb, 16); /* unknown always 0? */
1585 skip_bits(&s->gb, 16); /* unknown always 0? */
1586 skip_bits(&s->gb, 16); /* unknown always 0? */
1587 switch (i=get_bits(&s->gb, 8)) {
1597 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1602 if (id == AV_RL32("colr") && len > 0) {
1603 s->colr = get_bits(&s->gb, 8);
1604 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1605 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1609 if (id == AV_RL32("xfrm") && len > 0) {
1610 s->xfrm = get_bits(&s->gb, 8);
1611 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1612 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1617 /* JPS extension by VRex */
1618 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1619 int flags, layout, type;
1620 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1621 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1623 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1624 skip_bits(&s->gb, 16); len -= 2; /* block length */
1625 skip_bits(&s->gb, 8); /* reserved */
1626 flags = get_bits(&s->gb, 8);
1627 layout = get_bits(&s->gb, 8);
1628 type = get_bits(&s->gb, 8);
1631 s->stereo3d = av_stereo3d_alloc();
1636 s->stereo3d->type = AV_STEREO3D_2D;
1637 } else if (type == 1) {
1640 s->stereo3d->type = AV_STEREO3D_LINES;
1643 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1646 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1649 if (!(flags & 0x04)) {
1650 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1657 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1658 GetByteContext gbytes;
1659 int ret, le, ifd_offset, bytes_read;
1660 const uint8_t *aligned;
1662 skip_bits(&s->gb, 16); // skip padding
1665 // init byte wise reading
1666 aligned = align_get_bits(&s->gb);
1667 bytestream2_init(&gbytes, aligned, len);
1670 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1672 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1674 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1676 // read 0th IFD and store the metadata
1677 // (return values > 0 indicate the presence of subimage metadata)
1678 ret = avpriv_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1680 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1684 bytes_read = bytestream2_tell(&gbytes);
1685 skip_bits(&s->gb, bytes_read << 3);
1692 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1693 id = get_bits_long(&s->gb, 32);
1696 if (id == AV_RB32("mjpg")) {
1698 skip_bits(&s->gb, 32); /* field size */
1699 skip_bits(&s->gb, 32); /* pad field size */
1700 skip_bits(&s->gb, 32); /* next off */
1701 skip_bits(&s->gb, 32); /* quant off */
1702 skip_bits(&s->gb, 32); /* huff off */
1703 skip_bits(&s->gb, 32); /* image off */
1704 skip_bits(&s->gb, 32); /* scan off */
1705 skip_bits(&s->gb, 32); /* data off */
1707 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1708 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1713 /* slow but needed for extreme adobe jpegs */
1715 av_log(s->avctx, AV_LOG_ERROR,
1716 "mjpeg: error, decode_app parser read over the end\n");
1718 skip_bits(&s->gb, 8);
1723 static int mjpeg_decode_com(MJpegDecodeContext *s)
1725 int len = get_bits(&s->gb, 16);
1726 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1727 char *cbuf = av_malloc(len - 1);
1730 for (i = 0; i < len - 2; i++)
1731 cbuf[i] = get_bits(&s->gb, 8);
1732 if (i > 0 && cbuf[i - 1] == '\n')
1737 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1738 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1740 /* buggy avid, it puts EOI only at every 10th frame */
1741 if (!strncmp(cbuf, "AVID", 4)) {
1742 parse_avid(s, cbuf, len);
1743 } else if (!strcmp(cbuf, "CS=ITU601"))
1745 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32)) ||
1746 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1756 /* return the 8 bit start code value and update the search
1757 state. Return -1 if no start code found */
1758 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1760 const uint8_t *buf_ptr;
1765 buf_ptr = *pbuf_ptr;
1766 while (buf_end - buf_ptr > 1) {
1769 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1778 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1779 *pbuf_ptr = buf_ptr;
1783 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1784 const uint8_t **buf_ptr, const uint8_t *buf_end,
1785 const uint8_t **unescaped_buf_ptr,
1786 int *unescaped_buf_size)
1789 start_code = find_marker(buf_ptr, buf_end);
1791 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1793 return AVERROR(ENOMEM);
1795 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1796 if (start_code == SOS && !s->ls) {
1797 const uint8_t *src = *buf_ptr;
1798 uint8_t *dst = s->buffer;
1800 while (src < buf_end) {
1801 uint8_t x = *(src++);
1804 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1806 while (src < buf_end && x == 0xff)
1809 if (x >= 0xd0 && x <= 0xd7)
1816 *unescaped_buf_ptr = s->buffer;
1817 *unescaped_buf_size = dst - s->buffer;
1818 memset(s->buffer + *unescaped_buf_size, 0,
1819 FF_INPUT_BUFFER_PADDING_SIZE);
1821 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
1822 (buf_end - *buf_ptr) - (dst - s->buffer));
1823 } else if (start_code == SOS && s->ls) {
1824 const uint8_t *src = *buf_ptr;
1825 uint8_t *dst = s->buffer;
1831 while (src + t < buf_end) {
1832 uint8_t x = src[t++];
1834 while ((src + t < buf_end) && x == 0xff)
1843 init_put_bits(&pb, dst, t);
1845 /* unescape bitstream */
1847 uint8_t x = src[b++];
1848 put_bits(&pb, 8, x);
1851 put_bits(&pb, 7, x);
1855 flush_put_bits(&pb);
1857 *unescaped_buf_ptr = dst;
1858 *unescaped_buf_size = (bit_count + 7) >> 3;
1859 memset(s->buffer + *unescaped_buf_size, 0,
1860 FF_INPUT_BUFFER_PADDING_SIZE);
1862 *unescaped_buf_ptr = *buf_ptr;
1863 *unescaped_buf_size = buf_end - *buf_ptr;
1869 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1872 AVFrame *frame = data;
1873 const uint8_t *buf = avpkt->data;
1874 int buf_size = avpkt->size;
1875 MJpegDecodeContext *s = avctx->priv_data;
1876 const uint8_t *buf_end, *buf_ptr;
1877 const uint8_t *unescaped_buf_ptr;
1879 int unescaped_buf_size;
1884 av_dict_free(&s->exif_metadata);
1885 av_freep(&s->stereo3d);
1886 s->adobe_transform = -1;
1889 buf_end = buf + buf_size;
1890 while (buf_ptr < buf_end) {
1891 /* find start next marker */
1892 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1894 &unescaped_buf_size);
1896 if (start_code < 0) {
1898 } else if (unescaped_buf_size > INT_MAX / 8) {
1899 av_log(avctx, AV_LOG_ERROR,
1900 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1901 start_code, unescaped_buf_size, buf_size);
1902 return AVERROR_INVALIDDATA;
1904 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
1905 start_code, buf_end - buf_ptr);
1907 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
1910 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
1914 s->start_code = start_code;
1915 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1916 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1918 /* process markers */
1919 if (start_code >= 0xd0 && start_code <= 0xd7)
1920 av_log(avctx, AV_LOG_DEBUG,
1921 "restart marker: %d\n", start_code & 0x0f);
1923 else if (start_code >= APP0 && start_code <= APP15)
1924 mjpeg_decode_app(s);
1926 else if (start_code == COM)
1927 mjpeg_decode_com(s);
1931 if (!CONFIG_JPEGLS_DECODER &&
1932 (start_code == SOF48 || start_code == LSE)) {
1933 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
1934 return AVERROR(ENOSYS);
1937 switch (start_code) {
1939 s->restart_interval = 0;
1940 s->restart_count = 0;
1941 /* nothing to do on SOI */
1944 ff_mjpeg_decode_dqt(s);
1947 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1948 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1957 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1964 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1971 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1978 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1982 if (!CONFIG_JPEGLS_DECODER ||
1983 (ret = ff_jpegls_decode_lse(s)) < 0)
1989 if (!s->got_picture) {
1990 av_log(avctx, AV_LOG_WARNING,
1991 "Found EOI before any SOF, ignoring\n");
1994 if (s->interlaced) {
1995 s->bottom_field ^= 1;
1996 /* if not bottom field, do not output image yet */
1997 if (s->bottom_field == !s->interlace_polarity)
2000 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2006 int qp = FFMAX3(s->qscale[0],
2009 int qpw = (s->width + 15) / 16;
2010 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2012 memset(qp_table_buf->data, qp, qpw);
2013 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2016 if(avctx->debug & FF_DEBUG_QP)
2017 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2023 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2024 (avctx->err_recognition & AV_EF_EXPLODE))
2028 mjpeg_decode_dri(s);
2040 av_log(avctx, AV_LOG_ERROR,
2041 "mjpeg: unsupported coding type (%x)\n", start_code);
2045 /* eof process start code */
2046 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2047 av_log(avctx, AV_LOG_DEBUG,
2048 "marker parser used %d bytes (%d bits)\n",
2049 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2051 if (s->got_picture && s->cur_scan) {
2052 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2055 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2056 return AVERROR_INVALIDDATA;
2063 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2064 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2065 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2066 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2067 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2068 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2069 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2070 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2072 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2073 for (p = 1; p<4; p++) {
2074 uint8_t *line = s->picture_ptr->data[p];
2076 if (!(s->upscale_h & (1<<p)))
2078 w = s->width >> hshift;
2079 for (i = 0; i < s->chroma_height; i++) {
2080 for (index = w - 1; index; index--)
2081 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2082 line += s->linesize[p];
2088 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2089 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2090 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2091 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2092 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2093 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2095 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2096 for (p = 1; p < 4; p++) {
2097 uint8_t *dst = &((uint8_t *)s->picture_ptr->data[p])[(s->height - 1) * s->linesize[p]];
2099 if (!(s->upscale_v & (1<<p)))
2101 w = s->width >> hshift;
2102 for (i = s->height - 1; i; i--) {
2103 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2104 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2106 memcpy(dst, src1, w);
2108 for (index = 0; index < w; index++)
2109 dst[index] = (src1[index] + src2[index]) >> 1;
2111 dst -= s->linesize[p];
2117 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2118 for (index=0; index<4; index++) {
2119 uint8_t *dst = s->picture_ptr->data[index];
2120 int w = s->picture_ptr->width;
2121 int h = s->picture_ptr->height;
2122 if(index && index<3){
2123 w = FF_CEIL_RSHIFT(w, hshift);
2124 h = FF_CEIL_RSHIFT(h, vshift);
2127 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2128 for (i=0; i<h/2; i++) {
2130 FFSWAP(int, dst[j], dst2[j]);
2131 dst += s->picture_ptr->linesize[index];
2132 dst2 -= s->picture_ptr->linesize[index];
2137 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2138 int w = s->picture_ptr->width;
2139 int h = s->picture_ptr->height;
2140 for (i=0; i<h; i++) {
2143 for (index=0; index<4; index++) {
2144 dst[index] = s->picture_ptr->data[index]
2145 + s->picture_ptr->linesize[index]*i;
2147 for (j=0; j<w; j++) {
2149 int r = dst[0][j] * k;
2150 int g = dst[1][j] * k;
2151 int b = dst[2][j] * k;
2152 dst[0][j] = g*257 >> 16;
2153 dst[1][j] = b*257 >> 16;
2154 dst[2][j] = r*257 >> 16;
2159 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2160 int w = s->picture_ptr->width;
2161 int h = s->picture_ptr->height;
2162 for (i=0; i<h; i++) {
2165 for (index=0; index<4; index++) {
2166 dst[index] = s->picture_ptr->data[index]
2167 + s->picture_ptr->linesize[index]*i;
2169 for (j=0; j<w; j++) {
2171 int r = (255 - dst[0][j]) * k;
2172 int g = (128 - dst[1][j]) * k;
2173 int b = (128 - dst[2][j]) * k;
2174 dst[0][j] = r*257 >> 16;
2175 dst[1][j] = (g*257 >> 16) + 128;
2176 dst[2][j] = (b*257 >> 16) + 128;
2183 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2185 stereo->type = s->stereo3d->type;
2186 stereo->flags = s->stereo3d->flags;
2188 av_freep(&s->stereo3d);
2191 av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
2192 av_dict_free(&s->exif_metadata);
2194 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2196 // return buf_end - buf_ptr;
2197 return buf_ptr - buf;
2200 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2202 MJpegDecodeContext *s = avctx->priv_data;
2205 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2206 av_log(avctx, AV_LOG_INFO, "Single field\n");
2210 av_frame_free(&s->picture);
2211 s->picture_ptr = NULL;
2212 } else if (s->picture_ptr)
2213 av_frame_unref(s->picture_ptr);
2215 av_freep(&s->buffer);
2216 av_freep(&s->stereo3d);
2217 av_freep(&s->ljpeg_buffer);
2218 s->ljpeg_buffer_size = 0;
2220 for (i = 0; i < 3; i++) {
2221 for (j = 0; j < 4; j++)
2222 ff_free_vlc(&s->vlcs[i][j]);
2224 for (i = 0; i < MAX_COMPONENTS; i++) {
2225 av_freep(&s->blocks[i]);
2226 av_freep(&s->last_nnz[i]);
2228 av_dict_free(&s->exif_metadata);
2232 static void decode_flush(AVCodecContext *avctx)
2234 MJpegDecodeContext *s = avctx->priv_data;
2238 #if CONFIG_MJPEG_DECODER
2239 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2240 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2241 static const AVOption options[] = {
2242 { "extern_huff", "Use external huffman table.",
2243 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
2247 static const AVClass mjpegdec_class = {
2248 .class_name = "MJPEG decoder",
2249 .item_name = av_default_item_name,
2251 .version = LIBAVUTIL_VERSION_INT,
2254 AVCodec ff_mjpeg_decoder = {
2256 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2257 .type = AVMEDIA_TYPE_VIDEO,
2258 .id = AV_CODEC_ID_MJPEG,
2259 .priv_data_size = sizeof(MJpegDecodeContext),
2260 .init = ff_mjpeg_decode_init,
2261 .close = ff_mjpeg_decode_end,
2262 .decode = ff_mjpeg_decode_frame,
2263 .flush = decode_flush,
2264 .capabilities = CODEC_CAP_DR1,
2266 .priv_class = &mjpegdec_class,
2269 #if CONFIG_THP_DECODER
2270 AVCodec ff_thp_decoder = {
2272 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2273 .type = AVMEDIA_TYPE_VIDEO,
2274 .id = AV_CODEC_ID_THP,
2275 .priv_data_size = sizeof(MJpegDecodeContext),
2276 .init = ff_mjpeg_decode_init,
2277 .close = ff_mjpeg_decode_end,
2278 .decode = ff_mjpeg_decode_frame,
2279 .flush = decode_flush,
2280 .capabilities = CODEC_CAP_DR1,