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"
38 #include "copy_block.h"
43 #include "jpeglsdec.h"
46 #include "bytestream.h"
49 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
50 const uint8_t *val_table, int nb_codes,
51 int use_static, int is_ac)
53 uint8_t huff_size[256] = { 0 };
54 uint16_t huff_code[256];
55 uint16_t huff_sym[256];
58 av_assert0(nb_codes <= 256);
60 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
62 for (i = 0; i < 256; i++)
63 huff_sym[i] = i + 16 * is_ac;
66 huff_sym[0] = 16 * 256;
68 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
69 huff_code, 2, 2, huff_sym, 2, 2, use_static);
72 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
74 build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
75 avpriv_mjpeg_val_dc, 12, 0, 0);
76 build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
77 avpriv_mjpeg_val_dc, 12, 0, 0);
78 build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
79 avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
80 build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
81 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
82 build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
83 avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
84 build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
85 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
88 static void parse_avid(MJpegDecodeContext *s, uint8_t *buf, int len)
91 if (len > 14 && buf[12] == 1) /* 1 - NTSC */
92 s->interlace_polarity = 1;
93 if (len > 14 && buf[12] == 2) /* 2 - PAL */
94 s->interlace_polarity = 0;
95 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
96 av_log(s->avctx, AV_LOG_INFO, "AVID: len:%d %d\n", len, len > 14 ? buf[12] : -1);
99 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
101 MJpegDecodeContext *s = avctx->priv_data;
103 if (!s->picture_ptr) {
104 s->picture = av_frame_alloc();
106 return AVERROR(ENOMEM);
107 s->picture_ptr = s->picture;
111 ff_blockdsp_init(&s->bdsp, avctx);
112 ff_hpeldsp_init(&s->hdsp, avctx->flags);
113 ff_idctdsp_init(&s->idsp, avctx);
114 ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
119 s->first_picture = 1;
121 s->org_height = avctx->coded_height;
122 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
123 avctx->colorspace = AVCOL_SPC_BT470BG;
125 build_basic_mjpeg_vlc(s);
127 if (s->extern_huff) {
128 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
129 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
130 if (ff_mjpeg_decode_dht(s)) {
131 av_log(avctx, AV_LOG_ERROR,
132 "error using external huffman table, switching back to internal\n");
133 build_basic_mjpeg_vlc(s);
136 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
137 s->interlace_polarity = 1; /* bottom field first */
138 av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
139 } else if (avctx->field_order == AV_FIELD_UNKNOWN) {
140 if (avctx->codec_tag == AV_RL32("MJPG"))
141 s->interlace_polarity = 1;
144 if ( avctx->extradata_size > 8
145 && AV_RL32(avctx->extradata) == 0x2C
146 && AV_RL32(avctx->extradata+4) == 0x18) {
147 parse_avid(s, avctx->extradata, avctx->extradata_size);
150 if (avctx->codec->id == AV_CODEC_ID_AMV)
157 /* quantize tables */
158 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
160 int len, index, i, j;
162 len = get_bits(&s->gb, 16) - 2;
165 int pr = get_bits(&s->gb, 4);
167 av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
168 return AVERROR_INVALIDDATA;
170 index = get_bits(&s->gb, 4);
173 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
174 /* read quant table */
175 for (i = 0; i < 64; i++) {
176 j = s->scantable.permutated[i];
177 s->quant_matrixes[index][j] = get_bits(&s->gb, pr ? 16 : 8);
180 // XXX FIXME finetune, and perhaps add dc too
181 s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
182 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
183 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
184 index, s->qscale[index]);
190 /* decode huffman tables and build VLC decoders */
191 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
193 int len, index, i, class, n, v, code_max;
194 uint8_t bits_table[17];
195 uint8_t val_table[256];
198 len = get_bits(&s->gb, 16) - 2;
202 return AVERROR_INVALIDDATA;
203 class = get_bits(&s->gb, 4);
205 return AVERROR_INVALIDDATA;
206 index = get_bits(&s->gb, 4);
208 return AVERROR_INVALIDDATA;
210 for (i = 1; i <= 16; i++) {
211 bits_table[i] = get_bits(&s->gb, 8);
215 if (len < n || n > 256)
216 return AVERROR_INVALIDDATA;
219 for (i = 0; i < n; i++) {
220 v = get_bits(&s->gb, 8);
227 /* build VLC and flush previous vlc if present */
228 ff_free_vlc(&s->vlcs[class][index]);
229 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
230 class, index, code_max + 1);
231 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
232 code_max + 1, 0, class > 0)) < 0)
236 ff_free_vlc(&s->vlcs[2][index]);
237 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
238 code_max + 1, 0, 0)) < 0)
245 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
247 int len, nb_components, i, width, height, pix_fmt_id, ret;
248 int h_count[MAX_COMPONENTS];
249 int v_count[MAX_COMPONENTS];
252 s->upscale_h = s->upscale_v = 0;
254 /* XXX: verify len field validity */
255 len = get_bits(&s->gb, 16);
256 s->avctx->bits_per_raw_sample =
257 s->bits = get_bits(&s->gb, 8);
261 if (s->bits == 9 && !s->pegasus_rct)
262 s->rct = 1; // FIXME ugly
264 if(s->lossless && s->avctx->lowres){
265 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
269 height = get_bits(&s->gb, 16);
270 width = get_bits(&s->gb, 16);
272 if (s->avctx->codec_id == AV_CODEC_ID_AMV && (height&15))
273 avpriv_request_sample(s->avctx, "non mod 16 height AMV\n");
275 // HACK for odd_height.mov
276 if (s->interlaced && s->width == width && s->height == height + 1)
279 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
280 if (av_image_check_size(width, height, 0, s->avctx))
281 return AVERROR_INVALIDDATA;
283 nb_components = get_bits(&s->gb, 8);
284 if (nb_components <= 0 ||
285 nb_components > MAX_COMPONENTS)
287 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
288 if (nb_components != s->nb_components) {
289 av_log(s->avctx, AV_LOG_ERROR,
290 "nb_components changing in interlaced picture\n");
291 return AVERROR_INVALIDDATA;
294 if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
295 avpriv_report_missing_feature(s->avctx,
296 "JPEG-LS that is not <= 8 "
297 "bits/component or 16-bit gray");
298 return AVERROR_PATCHWELCOME;
300 s->nb_components = nb_components;
303 memset(h_count, 0, sizeof(h_count));
304 memset(v_count, 0, sizeof(v_count));
305 for (i = 0; i < nb_components; i++) {
307 s->component_id[i] = get_bits(&s->gb, 8) - 1;
308 h_count[i] = get_bits(&s->gb, 4);
309 v_count[i] = get_bits(&s->gb, 4);
310 /* compute hmax and vmax (only used in interleaved case) */
311 if (h_count[i] > s->h_max)
312 s->h_max = h_count[i];
313 if (v_count[i] > s->v_max)
314 s->v_max = v_count[i];
315 s->quant_index[i] = get_bits(&s->gb, 8);
316 if (s->quant_index[i] >= 4) {
317 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
318 return AVERROR_INVALIDDATA;
320 if (!h_count[i] || !v_count[i]) {
321 av_log(s->avctx, AV_LOG_ERROR,
322 "Invalid sampling factor in component %d %d:%d\n",
323 i, h_count[i], v_count[i]);
324 return AVERROR_INVALIDDATA;
327 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
328 i, h_count[i], v_count[i],
329 s->component_id[i], s->quant_index[i]);
332 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
333 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
334 return AVERROR_PATCHWELCOME;
338 /* if different size, realloc/alloc picture */
339 if ( width != s->width || height != s->height
340 || memcmp(s->h_count, h_count, sizeof(h_count))
341 || memcmp(s->v_count, v_count, sizeof(v_count))) {
345 memcpy(s->h_count, h_count, sizeof(h_count));
346 memcpy(s->v_count, v_count, sizeof(v_count));
350 /* test interlaced mode */
351 if (s->first_picture &&
352 s->org_height != 0 &&
353 s->height < ((s->org_height * 3) / 4)) {
355 s->bottom_field = s->interlace_polarity;
356 s->picture_ptr->interlaced_frame = 1;
357 s->picture_ptr->top_field_first = !s->interlace_polarity;
361 ret = ff_set_dimensions(s->avctx, width, height);
365 s->first_picture = 0;
368 if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
369 if (s->progressive) {
370 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
371 return AVERROR_INVALIDDATA;
374 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
376 else if (!s->lossless)
378 /* XXX: not complete test ! */
379 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
380 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
381 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
382 (s->h_count[3] << 4) | s->v_count[3];
383 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
384 /* NOTE we do not allocate pictures large enough for the possible
385 * padding of h/v_count being 4 */
386 if (!(pix_fmt_id & 0xD0D0D0D0))
387 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
388 if (!(pix_fmt_id & 0x0D0D0D0D))
389 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
391 for (i = 0; i < 8; i++) {
392 int j = 6 + (i&1) - (i&6);
393 int is = (pix_fmt_id >> (4*i)) & 0xF;
394 int js = (pix_fmt_id >> (4*j)) & 0xF;
396 if (is == 1 && js != 2 && (i < 2 || i > 5))
397 js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
398 if (is == 1 && js != 2 && (i < 2 || i > 5))
399 js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
401 if (is == 1 && js == 2) {
402 if (i & 1) s->upscale_h |= 1 << (j/2);
403 else s->upscale_v |= 1 << (j/2);
407 switch (pix_fmt_id) {
410 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
412 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
413 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
415 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
416 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
417 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
420 av_assert0(s->nb_components == 3);
424 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
426 if (s->adobe_transform == 0 && s->bits <= 8) {
427 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
429 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
430 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
433 av_assert0(s->nb_components == 4);
436 if (s->adobe_transform == 0 && s->bits <= 8) {
437 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
440 s->chroma_height = s->height;
441 } else if (s->adobe_transform == 2 && s->bits <= 8) {
442 s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
445 s->chroma_height = s->height;
446 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
448 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
449 else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
450 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
452 av_assert0(s->nb_components == 4);
458 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
461 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
462 s->chroma_height = s->height;
467 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
470 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
471 s->chroma_height = s->height / 2;
483 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
485 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
491 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
494 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
495 s->chroma_height = s->height / 2;
498 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
499 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
500 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
504 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
507 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
511 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
512 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
513 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
514 if (pix_fmt_id == 0x42111100) {
516 s->chroma_height = s->height / 2;
520 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
523 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
527 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
528 s->upscale_h = s->upscale_v = 0;
529 return AVERROR_PATCHWELCOME;
531 if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
532 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
533 return AVERROR_PATCHWELCOME;
536 s->upscale_h = s->upscale_v = 0;
537 if (s->nb_components > 1)
538 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
539 else if (s->palette_index && s->bits <= 8)
540 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
541 else if (s->bits <= 8)
542 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
544 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
547 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
549 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
553 av_frame_unref(s->picture_ptr);
554 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
556 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
557 s->picture_ptr->key_frame = 1;
560 for (i = 0; i < 4; i++)
561 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
563 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
564 s->width, s->height, s->linesize[0], s->linesize[1],
565 s->interlaced, s->avctx->height);
567 if (len != (8 + (3 * nb_components)))
568 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
571 if (s->rgb && !s->lossless && !s->ls) {
572 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
573 return AVERROR_PATCHWELCOME;
576 /* totally blank picture as progressive JPEG will only add details to it */
577 if (s->progressive) {
578 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
579 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
580 for (i = 0; i < s->nb_components; i++) {
581 int size = bw * bh * s->h_count[i] * s->v_count[i];
582 av_freep(&s->blocks[i]);
583 av_freep(&s->last_nnz[i]);
584 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
585 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
586 if (!s->blocks[i] || !s->last_nnz[i])
587 return AVERROR(ENOMEM);
588 s->block_stride[i] = bw * s->h_count[i];
590 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
595 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
598 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
599 if (code < 0 || code > 16) {
600 av_log(s->avctx, AV_LOG_WARNING,
601 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
602 0, dc_index, &s->vlcs[0][dc_index]);
607 return get_xbits(&s->gb, code);
612 /* decode block and dequantize */
613 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
614 int dc_index, int ac_index, int16_t *quant_matrix)
616 int code, i, j, level, val;
619 val = mjpeg_decode_dc(s, dc_index);
620 if (val == 0xfffff) {
621 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
622 return AVERROR_INVALIDDATA;
624 val = val * quant_matrix[0] + s->last_dc[component];
625 s->last_dc[component] = val;
629 {OPEN_READER(re, &s->gb);
631 UPDATE_CACHE(re, &s->gb);
632 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
634 i += ((unsigned)code) >> 4;
637 if (code > MIN_CACHE_BITS - 16)
638 UPDATE_CACHE(re, &s->gb);
641 int cache = GET_CACHE(re, &s->gb);
642 int sign = (~cache) >> 31;
643 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
646 LAST_SKIP_BITS(re, &s->gb, code);
649 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
650 return AVERROR_INVALIDDATA;
652 j = s->scantable.permutated[i];
653 block[j] = level * quant_matrix[j];
656 CLOSE_READER(re, &s->gb);}
661 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
662 int component, int dc_index,
663 int16_t *quant_matrix, int Al)
666 s->bdsp.clear_block(block);
667 val = mjpeg_decode_dc(s, dc_index);
668 if (val == 0xfffff) {
669 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
670 return AVERROR_INVALIDDATA;
672 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
673 s->last_dc[component] = val;
678 /* decode block and dequantize - progressive JPEG version */
679 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
680 uint8_t *last_nnz, int ac_index,
681 int16_t *quant_matrix,
682 int ss, int se, int Al, int *EOBRUN)
684 int code, i, j, level, val, run;
692 OPEN_READER(re, &s->gb);
693 for (i = ss; ; i++) {
694 UPDATE_CACHE(re, &s->gb);
695 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
697 run = ((unsigned) code) >> 4;
701 if (code > MIN_CACHE_BITS - 16)
702 UPDATE_CACHE(re, &s->gb);
705 int cache = GET_CACHE(re, &s->gb);
706 int sign = (~cache) >> 31;
707 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
710 LAST_SKIP_BITS(re, &s->gb, code);
714 j = s->scantable.permutated[se];
715 block[j] = level * quant_matrix[j] << Al;
718 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
719 return AVERROR_INVALIDDATA;
721 j = s->scantable.permutated[i];
722 block[j] = level * quant_matrix[j] << Al;
724 if (run == 0xF) {// ZRL - skip 15 coefficients
727 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
728 return AVERROR_INVALIDDATA;
733 UPDATE_CACHE(re, &s->gb);
734 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
735 LAST_SKIP_BITS(re, &s->gb, run);
742 CLOSE_READER(re, &s->gb);
751 #define REFINE_BIT(j) { \
752 UPDATE_CACHE(re, &s->gb); \
753 sign = block[j] >> 15; \
754 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
755 ((quant_matrix[j] ^ sign) - sign) << Al; \
756 LAST_SKIP_BITS(re, &s->gb, 1); \
764 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
769 j = s->scantable.permutated[i]; \
772 else if (run-- == 0) \
776 /* decode block and dequantize - progressive JPEG refinement pass */
777 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
779 int ac_index, int16_t *quant_matrix,
780 int ss, int se, int Al, int *EOBRUN)
782 int code, i = ss, j, sign, val, run;
783 int last = FFMIN(se, *last_nnz);
785 OPEN_READER(re, &s->gb);
790 UPDATE_CACHE(re, &s->gb);
791 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
794 run = ((unsigned) code) >> 4;
795 UPDATE_CACHE(re, &s->gb);
796 val = SHOW_UBITS(re, &s->gb, 1);
797 LAST_SKIP_BITS(re, &s->gb, 1);
799 j = s->scantable.permutated[i];
801 block[j] = ((quant_matrix[j]^val) - val) << Al;
805 CLOSE_READER(re, &s->gb);
809 run = ((unsigned) code) >> 4;
816 UPDATE_CACHE(re, &s->gb);
817 run += SHOW_UBITS(re, &s->gb, val);
818 LAST_SKIP_BITS(re, &s->gb, val);
830 for (; i <= last; i++) {
831 j = s->scantable.permutated[i];
835 CLOSE_READER(re, &s->gb);
842 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
847 if (s->restart_interval) {
849 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
850 align_get_bits(&s->gb);
851 for (i = 0; i < nb_components; i++) /* reset dc */
852 s->last_dc[i] = (4 << s->bits);
855 i = 8 + ((-get_bits_count(&s->gb)) & 7);
857 if (s->restart_count == 0) {
858 if( show_bits(&s->gb, i) == (1 << i) - 1
859 || show_bits(&s->gb, i) == 0xFF) {
860 int pos = get_bits_count(&s->gb);
861 align_get_bits(&s->gb);
862 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
863 skip_bits(&s->gb, 8);
864 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
865 for (i = 0; i < nb_components; i++) /* reset dc */
866 s->last_dc[i] = (4 << s->bits);
869 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
876 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
879 uint16_t (*buffer)[4];
880 int left[4], top[4], topleft[4];
881 const int linesize = s->linesize[0];
882 const int mask = ((1 << s->bits) - 1) << point_transform;
886 if (s->nb_components != 3 && s->nb_components != 4)
887 return AVERROR_INVALIDDATA;
888 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
889 return AVERROR_INVALIDDATA;
892 s->restart_count = s->restart_interval;
894 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
895 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
896 buffer = s->ljpeg_buffer;
898 for (i = 0; i < 4; i++)
899 buffer[0][i] = 1 << (s->bits - 1);
901 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
902 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
904 if (s->interlaced && s->bottom_field)
905 ptr += linesize >> 1;
907 for (i = 0; i < 4; i++)
908 top[i] = left[i] = topleft[i] = buffer[0][i];
910 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
911 int modified_predictor = predictor;
913 if (s->restart_interval && !s->restart_count){
914 s->restart_count = s->restart_interval;
918 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
920 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
921 modified_predictor = 1;
923 for (i=0;i<nb_components;i++) {
927 top[i] = buffer[mb_x][i];
929 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
931 dc = mjpeg_decode_dc(s, s->dc_index[i]);
935 left[i] = buffer[mb_x][i] =
936 mask & (pred + (dc << point_transform));
939 if (s->restart_interval && !--s->restart_count) {
940 align_get_bits(&s->gb);
941 skip_bits(&s->gb, 16); /* skip RSTn */
944 if (s->nb_components == 4) {
945 for(i=0; i<nb_components; i++) {
946 int c= s->comp_index[i];
948 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
949 ptr[4*mb_x+3-c] = buffer[mb_x][i];
951 } else if(s->bits == 9) {
952 return AVERROR_PATCHWELCOME;
954 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
955 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
960 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
961 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
962 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
963 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
965 } else if (s->pegasus_rct) {
966 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
967 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
968 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
969 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
972 for(i=0; i<nb_components; i++) {
973 int c= s->comp_index[i];
975 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
976 ptr[3*mb_x+2-c] = buffer[mb_x][i];
978 } else if(s->bits == 9) {
979 return AVERROR_PATCHWELCOME;
981 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
982 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
991 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
992 int point_transform, int nb_components)
994 int i, mb_x, mb_y, mask;
995 int bits= (s->bits+7)&~7;
999 point_transform += bits - s->bits;
1000 mask = ((1 << s->bits) - 1) << point_transform;
1002 av_assert0(nb_components>=1 && nb_components<=4);
1004 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1005 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1006 if (s->restart_interval && !s->restart_count){
1007 s->restart_count = s->restart_interval;
1012 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1013 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1014 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1015 for (i = 0; i < nb_components; i++) {
1018 int n, h, v, x, y, c, j, linesize;
1019 n = s->nb_blocks[i];
1020 c = s->comp_index[i];
1025 linesize= s->linesize[c];
1027 if(bits>8) linesize /= 2;
1029 for(j=0; j<n; j++) {
1032 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1036 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1038 if(x==0 && leftcol){
1039 pred= 1 << (bits - 1);
1044 if(x==0 && leftcol){
1045 pred= ptr[-linesize];
1047 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1051 if (s->interlaced && s->bottom_field)
1052 ptr += linesize >> 1;
1054 *ptr= pred + (dc << point_transform);
1056 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1058 if(x==0 && leftcol){
1059 pred= 1 << (bits - 1);
1064 if(x==0 && leftcol){
1065 pred= ptr16[-linesize];
1067 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1071 if (s->interlaced && s->bottom_field)
1072 ptr16 += linesize >> 1;
1074 *ptr16= pred + (dc << point_transform);
1083 for (i = 0; i < nb_components; i++) {
1086 int n, h, v, x, y, c, j, linesize, dc;
1087 n = s->nb_blocks[i];
1088 c = s->comp_index[i];
1093 linesize = s->linesize[c];
1095 if(bits>8) linesize /= 2;
1097 for (j = 0; j < n; j++) {
1100 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1104 ptr = s->picture_ptr->data[c] +
1105 (linesize * (v * mb_y + y)) +
1106 (h * mb_x + x); //FIXME optimize this crap
1107 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1110 *ptr = pred + (dc << point_transform);
1112 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1113 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1116 *ptr16= pred + (dc << point_transform);
1126 if (s->restart_interval && !--s->restart_count) {
1127 align_get_bits(&s->gb);
1128 skip_bits(&s->gb, 16); /* skip RSTn */
1135 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1136 uint8_t *dst, const uint8_t *src,
1137 int linesize, int lowres)
1140 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1142 case 1: copy_block4(dst, src, linesize, linesize, 4);
1144 case 2: copy_block2(dst, src, linesize, linesize, 2);
1146 case 3: *dst = *src;
1151 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1153 int block_x, block_y;
1154 int size = 8 >> s->avctx->lowres;
1156 for (block_y=0; block_y<size; block_y++)
1157 for (block_x=0; block_x<size; block_x++)
1158 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1160 for (block_y=0; block_y<size; block_y++)
1161 for (block_x=0; block_x<size; block_x++)
1162 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1166 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1167 int Al, const uint8_t *mb_bitmask,
1168 int mb_bitmask_size,
1169 const AVFrame *reference)
1172 uint8_t *data[MAX_COMPONENTS];
1173 const uint8_t *reference_data[MAX_COMPONENTS];
1174 int linesize[MAX_COMPONENTS];
1175 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1176 int bytes_per_pixel = 1 + (s->bits > 8);
1179 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1180 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1181 return AVERROR_INVALIDDATA;
1183 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1186 s->restart_count = 0;
1188 for (i = 0; i < nb_components; i++) {
1189 int c = s->comp_index[i];
1190 data[c] = s->picture_ptr->data[c];
1191 reference_data[c] = reference ? reference->data[c] : NULL;
1192 linesize[c] = s->linesize[c];
1193 s->coefs_finished[c] |= 1;
1196 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1197 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1198 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1200 if (s->restart_interval && !s->restart_count)
1201 s->restart_count = s->restart_interval;
1203 if (get_bits_left(&s->gb) < 0) {
1204 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1205 -get_bits_left(&s->gb));
1206 return AVERROR_INVALIDDATA;
1208 for (i = 0; i < nb_components; i++) {
1210 int n, h, v, x, y, c, j;
1212 n = s->nb_blocks[i];
1213 c = s->comp_index[i];
1218 for (j = 0; j < n; j++) {
1219 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1220 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1222 if (s->interlaced && s->bottom_field)
1223 block_offset += linesize[c] >> 1;
1224 ptr = data[c] + block_offset;
1225 if (!s->progressive) {
1227 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1228 linesize[c], s->avctx->lowres);
1231 s->bdsp.clear_block(s->block);
1232 if (decode_block(s, s->block, i,
1233 s->dc_index[i], s->ac_index[i],
1234 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1235 av_log(s->avctx, AV_LOG_ERROR,
1236 "error y=%d x=%d\n", mb_y, mb_x);
1237 return AVERROR_INVALIDDATA;
1239 s->idsp.idct_put(ptr, linesize[c], s->block);
1241 shift_output(s, ptr, linesize[c]);
1244 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1246 int16_t *block = s->blocks[c][block_idx];
1248 block[0] += get_bits1(&s->gb) *
1249 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1250 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1251 s->quant_matrixes[s->quant_sindex[i]],
1253 av_log(s->avctx, AV_LOG_ERROR,
1254 "error y=%d x=%d\n", mb_y, mb_x);
1255 return AVERROR_INVALIDDATA;
1258 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1259 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1260 mb_x, mb_y, x, y, c, s->bottom_field,
1261 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1269 handle_rstn(s, nb_components);
1275 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1276 int se, int Ah, int Al)
1280 int c = s->comp_index[0];
1281 uint8_t *data = s->picture_ptr->data[c];
1282 int linesize = s->linesize[c];
1284 int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1285 int bytes_per_pixel = 1 + (s->bits > 8);
1287 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1288 if (se < ss || se > 63) {
1289 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1290 return AVERROR_INVALIDDATA;
1294 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1295 last_scan = !~s->coefs_finished[c];
1298 if (s->interlaced && s->bottom_field)
1299 data += linesize >> 1;
1301 s->restart_count = 0;
1303 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1304 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1305 int block_idx = mb_y * s->block_stride[c];
1306 int16_t (*block)[64] = &s->blocks[c][block_idx];
1307 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1308 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1310 if (s->restart_interval && !s->restart_count)
1311 s->restart_count = s->restart_interval;
1314 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1315 quant_matrix, ss, se, Al, &EOBRUN);
1317 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1318 quant_matrix, ss, se, Al, &EOBRUN);
1320 av_log(s->avctx, AV_LOG_ERROR,
1321 "error y=%d x=%d\n", mb_y, mb_x);
1322 return AVERROR_INVALIDDATA;
1326 s->idsp.idct_put(ptr, linesize, *block);
1328 shift_output(s, ptr, linesize);
1329 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1331 if (handle_rstn(s, 0))
1338 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1339 int mb_bitmask_size, const AVFrame *reference)
1341 int len, nb_components, i, h, v, predictor, point_transform;
1343 const int block_size = s->lossless ? 1 : 8;
1344 int ilv, prev_shift;
1346 if (!s->got_picture) {
1347 av_log(s->avctx, AV_LOG_WARNING,
1348 "Can not process SOS before SOF, skipping\n");
1352 av_assert0(s->picture_ptr->data[0]);
1353 /* XXX: verify len field validity */
1354 len = get_bits(&s->gb, 16);
1355 nb_components = get_bits(&s->gb, 8);
1356 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1357 av_log(s->avctx, AV_LOG_ERROR,
1358 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1359 return AVERROR_PATCHWELCOME;
1361 if (len != 6 + 2 * nb_components) {
1362 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1363 return AVERROR_INVALIDDATA;
1365 for (i = 0; i < nb_components; i++) {
1366 id = get_bits(&s->gb, 8) - 1;
1367 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1368 /* find component index */
1369 for (index = 0; index < s->nb_components; index++)
1370 if (id == s->component_id[index])
1372 if (index == s->nb_components) {
1373 av_log(s->avctx, AV_LOG_ERROR,
1374 "decode_sos: index(%d) out of components\n", index);
1375 return AVERROR_INVALIDDATA;
1377 /* Metasoft MJPEG codec has Cb and Cr swapped */
1378 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1379 && nb_components == 3 && s->nb_components == 3 && i)
1382 s->quant_sindex[i] = s->quant_index[index];
1383 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1384 s->h_scount[i] = s->h_count[index];
1385 s->v_scount[i] = s->v_count[index];
1387 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1389 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1390 index = (index+2)%3;
1392 s->comp_index[i] = index;
1394 s->dc_index[i] = get_bits(&s->gb, 4);
1395 s->ac_index[i] = get_bits(&s->gb, 4);
1397 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1398 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1400 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))
1404 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1405 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1406 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1407 prev_shift = get_bits(&s->gb, 4); /* Ah */
1408 point_transform = get_bits(&s->gb, 4); /* Al */
1410 prev_shift = point_transform = 0;
1412 if (nb_components > 1) {
1413 /* interleaved stream */
1414 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1415 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1416 } else if (!s->ls) { /* skip this for JPEG-LS */
1417 h = s->h_max / s->h_scount[0];
1418 v = s->v_max / s->v_scount[0];
1419 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1420 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1421 s->nb_blocks[0] = 1;
1426 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1427 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1428 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1429 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1430 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1433 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1434 for (i = s->mjpb_skiptosod; i > 0; i--)
1435 skip_bits(&s->gb, 8);
1438 for (i = 0; i < nb_components; i++)
1439 s->last_dc[i] = (4 << s->bits);
1442 av_assert0(s->picture_ptr == s->picture);
1443 if (CONFIG_JPEGLS_DECODER && s->ls) {
1445 // reset_ls_coding_parameters(s, 0);
1447 if ((ret = ff_jpegls_decode_picture(s, predictor,
1448 point_transform, ilv)) < 0)
1452 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1455 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1457 nb_components)) < 0)
1462 if (s->progressive && predictor) {
1463 av_assert0(s->picture_ptr == s->picture);
1464 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1466 point_transform)) < 0)
1469 if ((ret = mjpeg_decode_scan(s, nb_components,
1470 prev_shift, point_transform,
1471 mb_bitmask, mb_bitmask_size, reference)) < 0)
1476 if (s->interlaced &&
1477 get_bits_left(&s->gb) > 32 &&
1478 show_bits(&s->gb, 8) == 0xFF) {
1479 GetBitContext bak = s->gb;
1480 align_get_bits(&bak);
1481 if (show_bits(&bak, 16) == 0xFFD1) {
1482 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1484 skip_bits(&s->gb, 16);
1485 s->bottom_field ^= 1;
1494 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1495 return AVERROR_INVALIDDATA;
1498 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1500 if (get_bits(&s->gb, 16) != 4)
1501 return AVERROR_INVALIDDATA;
1502 s->restart_interval = get_bits(&s->gb, 16);
1503 s->restart_count = 0;
1504 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1505 s->restart_interval);
1510 static int mjpeg_decode_app(MJpegDecodeContext *s)
1514 len = get_bits(&s->gb, 16);
1516 return AVERROR_INVALIDDATA;
1517 if (8 * len > get_bits_left(&s->gb))
1518 return AVERROR_INVALIDDATA;
1520 id = get_bits_long(&s->gb, 32);
1523 if (s->avctx->debug & FF_DEBUG_STARTCODE) {
1525 av_get_codec_tag_string(id_str, sizeof(id_str), av_bswap32(id));
1526 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n", id_str, id, len);
1529 /* Buggy AVID, it puts EOI only at every 10th frame. */
1530 /* Also, this fourcc is used by non-avid files too, it holds some
1531 information, but it's always present in AVID-created files. */
1532 if (id == AV_RB32("AVI1")) {
1538 4bytes field_size_less_padding
1541 i = get_bits(&s->gb, 8); len--;
1542 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1544 skip_bits(&s->gb, 8);
1545 skip_bits(&s->gb, 32);
1546 skip_bits(&s->gb, 32);
1554 if (id == AV_RB32("JFIF")) {
1555 int t_w, t_h, v1, v2;
1556 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1557 v1 = get_bits(&s->gb, 8);
1558 v2 = get_bits(&s->gb, 8);
1559 skip_bits(&s->gb, 8);
1561 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1562 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1563 ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
1565 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1566 av_log(s->avctx, AV_LOG_INFO,
1567 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1569 s->avctx->sample_aspect_ratio.num,
1570 s->avctx->sample_aspect_ratio.den);
1572 t_w = get_bits(&s->gb, 8);
1573 t_h = get_bits(&s->gb, 8);
1575 /* skip thumbnail */
1576 if (len -10 - (t_w * t_h * 3) > 0)
1577 len -= t_w * t_h * 3;
1583 if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1584 skip_bits(&s->gb, 16); /* version */
1585 skip_bits(&s->gb, 16); /* flags0 */
1586 skip_bits(&s->gb, 16); /* flags1 */
1587 s->adobe_transform = get_bits(&s->gb, 8);
1588 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1589 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1594 if (id == AV_RB32("LJIF")) {
1595 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1596 av_log(s->avctx, AV_LOG_INFO,
1597 "Pegasus lossless jpeg header found\n");
1598 skip_bits(&s->gb, 16); /* version ? */
1599 skip_bits(&s->gb, 16); /* unknown always 0? */
1600 skip_bits(&s->gb, 16); /* unknown always 0? */
1601 skip_bits(&s->gb, 16); /* unknown always 0? */
1602 switch (i=get_bits(&s->gb, 8)) {
1612 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1617 if (id == AV_RL32("colr") && len > 0) {
1618 s->colr = get_bits(&s->gb, 8);
1619 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1620 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1624 if (id == AV_RL32("xfrm") && len > 0) {
1625 s->xfrm = get_bits(&s->gb, 8);
1626 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1627 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1632 /* JPS extension by VRex */
1633 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1634 int flags, layout, type;
1635 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1636 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1638 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1639 skip_bits(&s->gb, 16); len -= 2; /* block length */
1640 skip_bits(&s->gb, 8); /* reserved */
1641 flags = get_bits(&s->gb, 8);
1642 layout = get_bits(&s->gb, 8);
1643 type = get_bits(&s->gb, 8);
1646 s->stereo3d = av_stereo3d_alloc();
1651 s->stereo3d->type = AV_STEREO3D_2D;
1652 } else if (type == 1) {
1655 s->stereo3d->type = AV_STEREO3D_LINES;
1658 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1661 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1664 if (!(flags & 0x04)) {
1665 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1672 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1673 GetByteContext gbytes;
1674 int ret, le, ifd_offset, bytes_read;
1675 const uint8_t *aligned;
1677 skip_bits(&s->gb, 16); // skip padding
1680 // init byte wise reading
1681 aligned = align_get_bits(&s->gb);
1682 bytestream2_init(&gbytes, aligned, len);
1685 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1687 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1689 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1691 // read 0th IFD and store the metadata
1692 // (return values > 0 indicate the presence of subimage metadata)
1693 ret = avpriv_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1695 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1699 bytes_read = bytestream2_tell(&gbytes);
1700 skip_bits(&s->gb, bytes_read << 3);
1707 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1708 id = get_bits_long(&s->gb, 32);
1711 if (id == AV_RB32("mjpg")) {
1713 skip_bits(&s->gb, 32); /* field size */
1714 skip_bits(&s->gb, 32); /* pad field size */
1715 skip_bits(&s->gb, 32); /* next off */
1716 skip_bits(&s->gb, 32); /* quant off */
1717 skip_bits(&s->gb, 32); /* huff off */
1718 skip_bits(&s->gb, 32); /* image off */
1719 skip_bits(&s->gb, 32); /* scan off */
1720 skip_bits(&s->gb, 32); /* data off */
1722 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1723 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1728 /* slow but needed for extreme adobe jpegs */
1730 av_log(s->avctx, AV_LOG_ERROR,
1731 "mjpeg: error, decode_app parser read over the end\n");
1733 skip_bits(&s->gb, 8);
1738 static int mjpeg_decode_com(MJpegDecodeContext *s)
1740 int len = get_bits(&s->gb, 16);
1741 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1742 char *cbuf = av_malloc(len - 1);
1745 for (i = 0; i < len - 2; i++)
1746 cbuf[i] = get_bits(&s->gb, 8);
1747 if (i > 0 && cbuf[i - 1] == '\n')
1752 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1753 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1755 /* buggy avid, it puts EOI only at every 10th frame */
1756 if (!strncmp(cbuf, "AVID", 4)) {
1757 parse_avid(s, cbuf, len);
1758 } else if (!strcmp(cbuf, "CS=ITU601"))
1760 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
1761 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1771 /* return the 8 bit start code value and update the search
1772 state. Return -1 if no start code found */
1773 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1775 const uint8_t *buf_ptr;
1780 buf_ptr = *pbuf_ptr;
1781 while (buf_end - buf_ptr > 1) {
1784 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1793 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1794 *pbuf_ptr = buf_ptr;
1798 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1799 const uint8_t **buf_ptr, const uint8_t *buf_end,
1800 const uint8_t **unescaped_buf_ptr,
1801 int *unescaped_buf_size)
1804 start_code = find_marker(buf_ptr, buf_end);
1806 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1808 return AVERROR(ENOMEM);
1810 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1811 if (start_code == SOS && !s->ls) {
1812 const uint8_t *src = *buf_ptr;
1813 uint8_t *dst = s->buffer;
1815 while (src < buf_end) {
1816 uint8_t x = *(src++);
1819 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1821 while (src < buf_end && x == 0xff)
1824 if (x >= 0xd0 && x <= 0xd7)
1831 *unescaped_buf_ptr = s->buffer;
1832 *unescaped_buf_size = dst - s->buffer;
1833 memset(s->buffer + *unescaped_buf_size, 0,
1834 FF_INPUT_BUFFER_PADDING_SIZE);
1836 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
1837 (buf_end - *buf_ptr) - (dst - s->buffer));
1838 } else if (start_code == SOS && s->ls) {
1839 const uint8_t *src = *buf_ptr;
1840 uint8_t *dst = s->buffer;
1846 while (src + t < buf_end) {
1847 uint8_t x = src[t++];
1849 while ((src + t < buf_end) && x == 0xff)
1858 init_put_bits(&pb, dst, t);
1860 /* unescape bitstream */
1862 uint8_t x = src[b++];
1863 put_bits(&pb, 8, x);
1866 put_bits(&pb, 7, x);
1870 flush_put_bits(&pb);
1872 *unescaped_buf_ptr = dst;
1873 *unescaped_buf_size = (bit_count + 7) >> 3;
1874 memset(s->buffer + *unescaped_buf_size, 0,
1875 FF_INPUT_BUFFER_PADDING_SIZE);
1877 *unescaped_buf_ptr = *buf_ptr;
1878 *unescaped_buf_size = buf_end - *buf_ptr;
1884 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1887 AVFrame *frame = data;
1888 const uint8_t *buf = avpkt->data;
1889 int buf_size = avpkt->size;
1890 MJpegDecodeContext *s = avctx->priv_data;
1891 const uint8_t *buf_end, *buf_ptr;
1892 const uint8_t *unescaped_buf_ptr;
1894 int unescaped_buf_size;
1899 av_dict_free(&s->exif_metadata);
1900 av_freep(&s->stereo3d);
1901 s->adobe_transform = -1;
1904 buf_end = buf + buf_size;
1905 while (buf_ptr < buf_end) {
1906 /* find start next marker */
1907 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1909 &unescaped_buf_size);
1911 if (start_code < 0) {
1913 } else if (unescaped_buf_size > INT_MAX / 8) {
1914 av_log(avctx, AV_LOG_ERROR,
1915 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1916 start_code, unescaped_buf_size, buf_size);
1917 return AVERROR_INVALIDDATA;
1919 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
1920 start_code, buf_end - buf_ptr);
1922 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
1925 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
1929 s->start_code = start_code;
1930 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1931 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1933 /* process markers */
1934 if (start_code >= 0xd0 && start_code <= 0xd7)
1935 av_log(avctx, AV_LOG_DEBUG,
1936 "restart marker: %d\n", start_code & 0x0f);
1938 else if (start_code >= APP0 && start_code <= APP15)
1939 mjpeg_decode_app(s);
1941 else if (start_code == COM)
1942 mjpeg_decode_com(s);
1946 if (!CONFIG_JPEGLS_DECODER &&
1947 (start_code == SOF48 || start_code == LSE)) {
1948 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
1949 return AVERROR(ENOSYS);
1952 switch (start_code) {
1954 s->restart_interval = 0;
1955 s->restart_count = 0;
1956 /* nothing to do on SOI */
1959 ff_mjpeg_decode_dqt(s);
1962 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1963 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1972 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1979 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1986 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1993 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1997 if (!CONFIG_JPEGLS_DECODER ||
1998 (ret = ff_jpegls_decode_lse(s)) < 0)
2004 if (!s->got_picture) {
2005 av_log(avctx, AV_LOG_WARNING,
2006 "Found EOI before any SOF, ignoring\n");
2009 if (s->interlaced) {
2010 s->bottom_field ^= 1;
2011 /* if not bottom field, do not output image yet */
2012 if (s->bottom_field == !s->interlace_polarity)
2015 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2021 int qp = FFMAX3(s->qscale[0],
2024 int qpw = (s->width + 15) / 16;
2025 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2027 memset(qp_table_buf->data, qp, qpw);
2028 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2031 if(avctx->debug & FF_DEBUG_QP)
2032 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2038 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2039 (avctx->err_recognition & AV_EF_EXPLODE))
2043 mjpeg_decode_dri(s);
2055 av_log(avctx, AV_LOG_ERROR,
2056 "mjpeg: unsupported coding type (%x)\n", start_code);
2060 /* eof process start code */
2061 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2062 av_log(avctx, AV_LOG_DEBUG,
2063 "marker parser used %d bytes (%d bits)\n",
2064 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2066 if (s->got_picture && s->cur_scan) {
2067 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2070 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2071 return AVERROR_INVALIDDATA;
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_YUVJ440P ||
2081 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2082 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2083 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2084 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2085 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2087 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2088 for (p = 0; p<4; p++) {
2089 uint8_t *line = s->picture_ptr->data[p];
2091 if (!(s->upscale_h & (1<<p)))
2095 for (i = 0; i < s->chroma_height; i++) {
2096 for (index = w - 1; index; index--)
2097 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2098 line += s->linesize[p];
2104 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2105 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2106 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2107 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2108 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2109 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2111 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2112 for (p = 0; p < 4; p++) {
2113 uint8_t *dst = &((uint8_t *)s->picture_ptr->data[p])[(s->height - 1) * s->linesize[p]];
2115 if (!(s->upscale_v & (1<<p)))
2119 for (i = s->height - 1; i; i--) {
2120 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2121 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2123 memcpy(dst, src1, w);
2125 for (index = 0; index < w; index++)
2126 dst[index] = (src1[index] + src2[index]) >> 1;
2128 dst -= s->linesize[p];
2134 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2135 for (index=0; index<4; index++) {
2136 uint8_t *dst = s->picture_ptr->data[index];
2137 int w = s->picture_ptr->width;
2138 int h = s->picture_ptr->height;
2139 if(index && index<3){
2140 w = FF_CEIL_RSHIFT(w, hshift);
2141 h = FF_CEIL_RSHIFT(h, vshift);
2144 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2145 for (i=0; i<h/2; i++) {
2147 FFSWAP(int, dst[j], dst2[j]);
2148 dst += s->picture_ptr->linesize[index];
2149 dst2 -= s->picture_ptr->linesize[index];
2154 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2155 int w = s->picture_ptr->width;
2156 int h = s->picture_ptr->height;
2157 for (i=0; i<h; i++) {
2160 for (index=0; index<4; index++) {
2161 dst[index] = s->picture_ptr->data[index]
2162 + s->picture_ptr->linesize[index]*i;
2164 for (j=0; j<w; j++) {
2166 int r = dst[0][j] * k;
2167 int g = dst[1][j] * k;
2168 int b = dst[2][j] * k;
2169 dst[0][j] = g*257 >> 16;
2170 dst[1][j] = b*257 >> 16;
2171 dst[2][j] = r*257 >> 16;
2176 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2177 int w = s->picture_ptr->width;
2178 int h = s->picture_ptr->height;
2179 for (i=0; i<h; i++) {
2182 for (index=0; index<4; index++) {
2183 dst[index] = s->picture_ptr->data[index]
2184 + s->picture_ptr->linesize[index]*i;
2186 for (j=0; j<w; j++) {
2188 int r = (255 - dst[0][j]) * k;
2189 int g = (128 - dst[1][j]) * k;
2190 int b = (128 - dst[2][j]) * k;
2191 dst[0][j] = r*257 >> 16;
2192 dst[1][j] = (g*257 >> 16) + 128;
2193 dst[2][j] = (b*257 >> 16) + 128;
2200 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2202 stereo->type = s->stereo3d->type;
2203 stereo->flags = s->stereo3d->flags;
2205 av_freep(&s->stereo3d);
2208 av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
2209 av_dict_free(&s->exif_metadata);
2211 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2213 // return buf_end - buf_ptr;
2214 return buf_ptr - buf;
2217 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2219 MJpegDecodeContext *s = avctx->priv_data;
2222 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2223 av_log(avctx, AV_LOG_INFO, "Single field\n");
2227 av_frame_free(&s->picture);
2228 s->picture_ptr = NULL;
2229 } else if (s->picture_ptr)
2230 av_frame_unref(s->picture_ptr);
2232 av_freep(&s->buffer);
2233 av_freep(&s->stereo3d);
2234 av_freep(&s->ljpeg_buffer);
2235 s->ljpeg_buffer_size = 0;
2237 for (i = 0; i < 3; i++) {
2238 for (j = 0; j < 4; j++)
2239 ff_free_vlc(&s->vlcs[i][j]);
2241 for (i = 0; i < MAX_COMPONENTS; i++) {
2242 av_freep(&s->blocks[i]);
2243 av_freep(&s->last_nnz[i]);
2245 av_dict_free(&s->exif_metadata);
2249 static void decode_flush(AVCodecContext *avctx)
2251 MJpegDecodeContext *s = avctx->priv_data;
2255 #if CONFIG_MJPEG_DECODER
2256 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2257 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2258 static const AVOption options[] = {
2259 { "extern_huff", "Use external huffman table.",
2260 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
2264 static const AVClass mjpegdec_class = {
2265 .class_name = "MJPEG decoder",
2266 .item_name = av_default_item_name,
2268 .version = LIBAVUTIL_VERSION_INT,
2271 AVCodec ff_mjpeg_decoder = {
2273 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2274 .type = AVMEDIA_TYPE_VIDEO,
2275 .id = AV_CODEC_ID_MJPEG,
2276 .priv_data_size = sizeof(MJpegDecodeContext),
2277 .init = ff_mjpeg_decode_init,
2278 .close = ff_mjpeg_decode_end,
2279 .decode = ff_mjpeg_decode_frame,
2280 .flush = decode_flush,
2281 .capabilities = CODEC_CAP_DR1,
2283 .priv_class = &mjpegdec_class,
2286 #if CONFIG_THP_DECODER
2287 AVCodec ff_thp_decoder = {
2289 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2290 .type = AVMEDIA_TYPE_VIDEO,
2291 .id = AV_CODEC_ID_THP,
2292 .priv_data_size = sizeof(MJpegDecodeContext),
2293 .init = ff_mjpeg_decode_init,
2294 .close = ff_mjpeg_decode_end,
2295 .decode = ff_mjpeg_decode_frame,
2296 .flush = decode_flush,
2297 .capabilities = CODEC_CAP_DR1,