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, bits, 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 bits = get_bits(&s->gb, 8);
259 if (bits > 16 || bits < 1) {
260 av_log(s->avctx, AV_LOG_ERROR, "bits %d is invalid\n", bits);
261 return AVERROR_INVALIDDATA;
266 if (bits == 9 && !s->pegasus_rct)
267 s->rct = 1; // FIXME ugly
269 if(s->lossless && s->avctx->lowres){
270 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
274 height = get_bits(&s->gb, 16);
275 width = get_bits(&s->gb, 16);
277 if (s->avctx->codec_id == AV_CODEC_ID_AMV && (height&15))
278 avpriv_request_sample(s->avctx, "non mod 16 height AMV\n");
280 // HACK for odd_height.mov
281 if (s->interlaced && s->width == width && s->height == height + 1)
284 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
285 if (av_image_check_size(width, height, 0, s->avctx))
286 return AVERROR_INVALIDDATA;
288 nb_components = get_bits(&s->gb, 8);
289 if (nb_components <= 0 ||
290 nb_components > MAX_COMPONENTS)
292 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
293 if (nb_components != s->nb_components) {
294 av_log(s->avctx, AV_LOG_ERROR,
295 "nb_components changing in interlaced picture\n");
296 return AVERROR_INVALIDDATA;
299 if (s->ls && !(bits <= 8 || nb_components == 1)) {
300 avpriv_report_missing_feature(s->avctx,
301 "JPEG-LS that is not <= 8 "
302 "bits/component or 16-bit gray");
303 return AVERROR_PATCHWELCOME;
305 s->nb_components = nb_components;
308 memset(h_count, 0, sizeof(h_count));
309 memset(v_count, 0, sizeof(v_count));
310 for (i = 0; i < nb_components; i++) {
312 s->component_id[i] = get_bits(&s->gb, 8) - 1;
313 h_count[i] = get_bits(&s->gb, 4);
314 v_count[i] = get_bits(&s->gb, 4);
315 /* compute hmax and vmax (only used in interleaved case) */
316 if (h_count[i] > s->h_max)
317 s->h_max = h_count[i];
318 if (v_count[i] > s->v_max)
319 s->v_max = v_count[i];
320 s->quant_index[i] = get_bits(&s->gb, 8);
321 if (s->quant_index[i] >= 4) {
322 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
323 return AVERROR_INVALIDDATA;
325 if (!h_count[i] || !v_count[i]) {
326 av_log(s->avctx, AV_LOG_ERROR,
327 "Invalid sampling factor in component %d %d:%d\n",
328 i, h_count[i], v_count[i]);
329 return AVERROR_INVALIDDATA;
332 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
333 i, h_count[i], v_count[i],
334 s->component_id[i], s->quant_index[i]);
337 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
338 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
339 return AVERROR_PATCHWELCOME;
343 /* if different size, realloc/alloc picture */
344 if ( width != s->width || height != s->height
346 || memcmp(s->h_count, h_count, sizeof(h_count))
347 || memcmp(s->v_count, v_count, sizeof(v_count))) {
352 memcpy(s->h_count, h_count, sizeof(h_count));
353 memcpy(s->v_count, v_count, sizeof(v_count));
357 /* test interlaced mode */
358 if (s->first_picture &&
359 s->org_height != 0 &&
360 s->height < ((s->org_height * 3) / 4)) {
362 s->bottom_field = s->interlace_polarity;
363 s->picture_ptr->interlaced_frame = 1;
364 s->picture_ptr->top_field_first = !s->interlace_polarity;
368 ret = ff_set_dimensions(s->avctx, width, height);
372 s->first_picture = 0;
375 if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
376 if (s->progressive) {
377 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
378 return AVERROR_INVALIDDATA;
381 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
383 else if (!s->lossless)
385 /* XXX: not complete test ! */
386 pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
387 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
388 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
389 (s->h_count[3] << 4) | s->v_count[3];
390 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
391 /* NOTE we do not allocate pictures large enough for the possible
392 * padding of h/v_count being 4 */
393 if (!(pix_fmt_id & 0xD0D0D0D0))
394 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
395 if (!(pix_fmt_id & 0x0D0D0D0D))
396 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
398 for (i = 0; i < 8; i++) {
399 int j = 6 + (i&1) - (i&6);
400 int is = (pix_fmt_id >> (4*i)) & 0xF;
401 int js = (pix_fmt_id >> (4*j)) & 0xF;
403 if (is == 1 && js != 2 && (i < 2 || i > 5))
404 js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
405 if (is == 1 && js != 2 && (i < 2 || i > 5))
406 js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
408 if (is == 1 && js == 2) {
409 if (i & 1) s->upscale_h |= 1 << (j/2);
410 else s->upscale_v |= 1 << (j/2);
414 switch (pix_fmt_id) {
417 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
419 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
420 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
422 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
423 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
424 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
427 av_assert0(s->nb_components == 3);
431 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
433 if (s->adobe_transform == 0 && s->bits <= 8) {
434 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
436 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
437 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
440 av_assert0(s->nb_components == 4);
444 if (s->adobe_transform == 0 && s->bits <= 8) {
445 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
448 } else if (s->adobe_transform == 2 && s->bits <= 8) {
449 s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
452 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
454 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
455 else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
456 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
458 av_assert0(s->nb_components == 4);
464 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
467 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
472 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
475 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
487 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
489 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
496 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
497 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
502 if (pix_fmt_id == 0x14111100)
504 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
507 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
511 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
512 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
517 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
518 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
519 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
524 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
527 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
532 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
533 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
534 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
535 if (pix_fmt_id == 0x42111100) {
539 } else if (pix_fmt_id == 0x24111100) {
546 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
549 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
553 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x bits:%d\n", pix_fmt_id, s->bits);
554 s->upscale_h = s->upscale_v = 0;
555 return AVERROR_PATCHWELCOME;
557 if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
558 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
559 return AVERROR_PATCHWELCOME;
562 s->upscale_h = s->upscale_v = 0;
563 if (s->nb_components > 1)
564 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
565 else if (s->palette_index && s->bits <= 8)
566 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
567 else if (s->bits <= 8)
568 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
570 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
573 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
575 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
579 av_frame_unref(s->picture_ptr);
580 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
582 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
583 s->picture_ptr->key_frame = 1;
586 for (i = 0; i < 4; i++)
587 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
589 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
590 s->width, s->height, s->linesize[0], s->linesize[1],
591 s->interlaced, s->avctx->height);
593 if (len != (8 + (3 * nb_components)))
594 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
597 if (s->rgb && !s->lossless && !s->ls) {
598 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
599 return AVERROR_PATCHWELCOME;
602 /* totally blank picture as progressive JPEG will only add details to it */
603 if (s->progressive) {
604 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
605 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
606 for (i = 0; i < s->nb_components; i++) {
607 int size = bw * bh * s->h_count[i] * s->v_count[i];
608 av_freep(&s->blocks[i]);
609 av_freep(&s->last_nnz[i]);
610 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
611 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
612 if (!s->blocks[i] || !s->last_nnz[i])
613 return AVERROR(ENOMEM);
614 s->block_stride[i] = bw * s->h_count[i];
616 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
621 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
624 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
625 if (code < 0 || code > 16) {
626 av_log(s->avctx, AV_LOG_WARNING,
627 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
628 0, dc_index, &s->vlcs[0][dc_index]);
633 return get_xbits(&s->gb, code);
638 /* decode block and dequantize */
639 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
640 int dc_index, int ac_index, int16_t *quant_matrix)
642 int code, i, j, level, val;
645 val = mjpeg_decode_dc(s, dc_index);
646 if (val == 0xfffff) {
647 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
648 return AVERROR_INVALIDDATA;
650 val = val * quant_matrix[0] + s->last_dc[component];
651 s->last_dc[component] = val;
655 {OPEN_READER(re, &s->gb);
657 UPDATE_CACHE(re, &s->gb);
658 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
660 i += ((unsigned)code) >> 4;
663 if (code > MIN_CACHE_BITS - 16)
664 UPDATE_CACHE(re, &s->gb);
667 int cache = GET_CACHE(re, &s->gb);
668 int sign = (~cache) >> 31;
669 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
672 LAST_SKIP_BITS(re, &s->gb, code);
675 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
676 return AVERROR_INVALIDDATA;
678 j = s->scantable.permutated[i];
679 block[j] = level * quant_matrix[j];
682 CLOSE_READER(re, &s->gb);}
687 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
688 int component, int dc_index,
689 int16_t *quant_matrix, int Al)
692 s->bdsp.clear_block(block);
693 val = mjpeg_decode_dc(s, dc_index);
694 if (val == 0xfffff) {
695 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
696 return AVERROR_INVALIDDATA;
698 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
699 s->last_dc[component] = val;
704 /* decode block and dequantize - progressive JPEG version */
705 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
706 uint8_t *last_nnz, int ac_index,
707 int16_t *quant_matrix,
708 int ss, int se, int Al, int *EOBRUN)
710 int code, i, j, level, val, run;
718 OPEN_READER(re, &s->gb);
719 for (i = ss; ; i++) {
720 UPDATE_CACHE(re, &s->gb);
721 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
723 run = ((unsigned) code) >> 4;
727 if (code > MIN_CACHE_BITS - 16)
728 UPDATE_CACHE(re, &s->gb);
731 int cache = GET_CACHE(re, &s->gb);
732 int sign = (~cache) >> 31;
733 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
736 LAST_SKIP_BITS(re, &s->gb, code);
740 j = s->scantable.permutated[se];
741 block[j] = level * quant_matrix[j] << Al;
744 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
745 return AVERROR_INVALIDDATA;
747 j = s->scantable.permutated[i];
748 block[j] = level * quant_matrix[j] << Al;
750 if (run == 0xF) {// ZRL - skip 15 coefficients
753 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
754 return AVERROR_INVALIDDATA;
759 UPDATE_CACHE(re, &s->gb);
760 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
761 LAST_SKIP_BITS(re, &s->gb, run);
768 CLOSE_READER(re, &s->gb);
777 #define REFINE_BIT(j) { \
778 UPDATE_CACHE(re, &s->gb); \
779 sign = block[j] >> 15; \
780 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
781 ((quant_matrix[j] ^ sign) - sign) << Al; \
782 LAST_SKIP_BITS(re, &s->gb, 1); \
790 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
795 j = s->scantable.permutated[i]; \
798 else if (run-- == 0) \
802 /* decode block and dequantize - progressive JPEG refinement pass */
803 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
805 int ac_index, int16_t *quant_matrix,
806 int ss, int se, int Al, int *EOBRUN)
808 int code, i = ss, j, sign, val, run;
809 int last = FFMIN(se, *last_nnz);
811 OPEN_READER(re, &s->gb);
816 UPDATE_CACHE(re, &s->gb);
817 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
820 run = ((unsigned) code) >> 4;
821 UPDATE_CACHE(re, &s->gb);
822 val = SHOW_UBITS(re, &s->gb, 1);
823 LAST_SKIP_BITS(re, &s->gb, 1);
825 j = s->scantable.permutated[i];
827 block[j] = ((quant_matrix[j]^val) - val) << Al;
831 CLOSE_READER(re, &s->gb);
835 run = ((unsigned) code) >> 4;
842 UPDATE_CACHE(re, &s->gb);
843 run += SHOW_UBITS(re, &s->gb, val);
844 LAST_SKIP_BITS(re, &s->gb, val);
856 for (; i <= last; i++) {
857 j = s->scantable.permutated[i];
861 CLOSE_READER(re, &s->gb);
868 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
873 if (s->restart_interval) {
875 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
876 align_get_bits(&s->gb);
877 for (i = 0; i < nb_components; i++) /* reset dc */
878 s->last_dc[i] = (4 << s->bits);
881 i = 8 + ((-get_bits_count(&s->gb)) & 7);
883 if (s->restart_count == 0) {
884 if( show_bits(&s->gb, i) == (1 << i) - 1
885 || show_bits(&s->gb, i) == 0xFF) {
886 int pos = get_bits_count(&s->gb);
887 align_get_bits(&s->gb);
888 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
889 skip_bits(&s->gb, 8);
890 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
891 for (i = 0; i < nb_components; i++) /* reset dc */
892 s->last_dc[i] = (4 << s->bits);
895 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
902 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
905 uint16_t (*buffer)[4];
906 int left[4], top[4], topleft[4];
907 const int linesize = s->linesize[0];
908 const int mask = ((1 << s->bits) - 1) << point_transform;
912 if (s->nb_components != 3 && s->nb_components != 4)
913 return AVERROR_INVALIDDATA;
914 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
915 return AVERROR_INVALIDDATA;
918 s->restart_count = s->restart_interval;
920 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
921 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
922 buffer = s->ljpeg_buffer;
924 for (i = 0; i < 4; i++)
925 buffer[0][i] = 1 << (s->bits - 1);
927 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
928 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
930 if (s->interlaced && s->bottom_field)
931 ptr += linesize >> 1;
933 for (i = 0; i < 4; i++)
934 top[i] = left[i] = topleft[i] = buffer[0][i];
936 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
937 int modified_predictor = predictor;
939 if (s->restart_interval && !s->restart_count){
940 s->restart_count = s->restart_interval;
944 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
946 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
947 modified_predictor = 1;
949 for (i=0;i<nb_components;i++) {
953 top[i] = buffer[mb_x][i];
955 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
957 dc = mjpeg_decode_dc(s, s->dc_index[i]);
961 left[i] = buffer[mb_x][i] =
962 mask & (pred + (dc << point_transform));
965 if (s->restart_interval && !--s->restart_count) {
966 align_get_bits(&s->gb);
967 skip_bits(&s->gb, 16); /* skip RSTn */
970 if (s->nb_components == 4) {
971 for(i=0; i<nb_components; i++) {
972 int c= s->comp_index[i];
974 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
975 ptr[4*mb_x+3-c] = buffer[mb_x][i];
977 } else if(s->bits == 9) {
978 return AVERROR_PATCHWELCOME;
980 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
981 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
986 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
987 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
988 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
989 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
991 } else if (s->pegasus_rct) {
992 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
993 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
994 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
995 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
998 for(i=0; i<nb_components; i++) {
999 int c= s->comp_index[i];
1001 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1002 ptr[3*mb_x+2-c] = buffer[mb_x][i];
1004 } else if(s->bits == 9) {
1005 return AVERROR_PATCHWELCOME;
1007 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1008 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
1017 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1018 int point_transform, int nb_components)
1020 int i, mb_x, mb_y, mask;
1021 int bits= (s->bits+7)&~7;
1022 int resync_mb_y = 0;
1023 int resync_mb_x = 0;
1025 point_transform += bits - s->bits;
1026 mask = ((1 << s->bits) - 1) << point_transform;
1028 av_assert0(nb_components>=1 && nb_components<=4);
1030 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1031 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1032 if (s->restart_interval && !s->restart_count){
1033 s->restart_count = s->restart_interval;
1038 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1039 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1040 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1041 for (i = 0; i < nb_components; i++) {
1044 int n, h, v, x, y, c, j, linesize;
1045 n = s->nb_blocks[i];
1046 c = s->comp_index[i];
1051 linesize= s->linesize[c];
1053 if(bits>8) linesize /= 2;
1055 for(j=0; j<n; j++) {
1058 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1062 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1064 if(x==0 && leftcol){
1065 pred= 1 << (bits - 1);
1070 if(x==0 && leftcol){
1071 pred= ptr[-linesize];
1073 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1077 if (s->interlaced && s->bottom_field)
1078 ptr += linesize >> 1;
1080 *ptr= pred + (dc << point_transform);
1082 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1084 if(x==0 && leftcol){
1085 pred= 1 << (bits - 1);
1090 if(x==0 && leftcol){
1091 pred= ptr16[-linesize];
1093 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1097 if (s->interlaced && s->bottom_field)
1098 ptr16 += linesize >> 1;
1100 *ptr16= pred + (dc << point_transform);
1109 for (i = 0; i < nb_components; i++) {
1112 int n, h, v, x, y, c, j, linesize, dc;
1113 n = s->nb_blocks[i];
1114 c = s->comp_index[i];
1119 linesize = s->linesize[c];
1121 if(bits>8) linesize /= 2;
1123 for (j = 0; j < n; j++) {
1126 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1130 ptr = s->picture_ptr->data[c] +
1131 (linesize * (v * mb_y + y)) +
1132 (h * mb_x + x); //FIXME optimize this crap
1133 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1136 *ptr = pred + (dc << point_transform);
1138 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1139 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1142 *ptr16= pred + (dc << point_transform);
1152 if (s->restart_interval && !--s->restart_count) {
1153 align_get_bits(&s->gb);
1154 skip_bits(&s->gb, 16); /* skip RSTn */
1161 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1162 uint8_t *dst, const uint8_t *src,
1163 int linesize, int lowres)
1166 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1168 case 1: copy_block4(dst, src, linesize, linesize, 4);
1170 case 2: copy_block2(dst, src, linesize, linesize, 2);
1172 case 3: *dst = *src;
1177 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1179 int block_x, block_y;
1180 int size = 8 >> s->avctx->lowres;
1182 for (block_y=0; block_y<size; block_y++)
1183 for (block_x=0; block_x<size; block_x++)
1184 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1186 for (block_y=0; block_y<size; block_y++)
1187 for (block_x=0; block_x<size; block_x++)
1188 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1192 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1193 int Al, const uint8_t *mb_bitmask,
1194 int mb_bitmask_size,
1195 const AVFrame *reference)
1198 uint8_t *data[MAX_COMPONENTS];
1199 const uint8_t *reference_data[MAX_COMPONENTS];
1200 int linesize[MAX_COMPONENTS];
1201 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1202 int bytes_per_pixel = 1 + (s->bits > 8);
1205 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1206 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1207 return AVERROR_INVALIDDATA;
1209 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1212 s->restart_count = 0;
1214 for (i = 0; i < nb_components; i++) {
1215 int c = s->comp_index[i];
1216 data[c] = s->picture_ptr->data[c];
1217 reference_data[c] = reference ? reference->data[c] : NULL;
1218 linesize[c] = s->linesize[c];
1219 s->coefs_finished[c] |= 1;
1222 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1223 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1224 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1226 if (s->restart_interval && !s->restart_count)
1227 s->restart_count = s->restart_interval;
1229 if (get_bits_left(&s->gb) < 0) {
1230 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1231 -get_bits_left(&s->gb));
1232 return AVERROR_INVALIDDATA;
1234 for (i = 0; i < nb_components; i++) {
1236 int n, h, v, x, y, c, j;
1238 n = s->nb_blocks[i];
1239 c = s->comp_index[i];
1244 for (j = 0; j < n; j++) {
1245 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1246 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1248 if (s->interlaced && s->bottom_field)
1249 block_offset += linesize[c] >> 1;
1250 ptr = data[c] + block_offset;
1251 if (!s->progressive) {
1253 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1254 linesize[c], s->avctx->lowres);
1257 s->bdsp.clear_block(s->block);
1258 if (decode_block(s, s->block, i,
1259 s->dc_index[i], s->ac_index[i],
1260 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1261 av_log(s->avctx, AV_LOG_ERROR,
1262 "error y=%d x=%d\n", mb_y, mb_x);
1263 return AVERROR_INVALIDDATA;
1265 s->idsp.idct_put(ptr, linesize[c], s->block);
1267 shift_output(s, ptr, linesize[c]);
1270 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1272 int16_t *block = s->blocks[c][block_idx];
1274 block[0] += get_bits1(&s->gb) *
1275 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1276 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1277 s->quant_matrixes[s->quant_sindex[i]],
1279 av_log(s->avctx, AV_LOG_ERROR,
1280 "error y=%d x=%d\n", mb_y, mb_x);
1281 return AVERROR_INVALIDDATA;
1284 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1285 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1286 mb_x, mb_y, x, y, c, s->bottom_field,
1287 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1295 handle_rstn(s, nb_components);
1301 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1302 int se, int Ah, int Al)
1306 int c = s->comp_index[0];
1307 uint8_t *data = s->picture_ptr->data[c];
1308 int linesize = s->linesize[c];
1310 int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1311 int bytes_per_pixel = 1 + (s->bits > 8);
1313 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1314 if (se < ss || se > 63) {
1315 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1316 return AVERROR_INVALIDDATA;
1320 // s->coefs_finished is a bitmask for coefficients coded
1321 // ss and se are parameters telling start and end coefficients
1322 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1323 last_scan = !~s->coefs_finished[c];
1326 if (s->interlaced && s->bottom_field)
1327 data += linesize >> 1;
1329 s->restart_count = 0;
1331 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1332 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1333 int block_idx = mb_y * s->block_stride[c];
1334 int16_t (*block)[64] = &s->blocks[c][block_idx];
1335 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1336 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1338 if (s->restart_interval && !s->restart_count)
1339 s->restart_count = s->restart_interval;
1342 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1343 quant_matrix, ss, se, Al, &EOBRUN);
1345 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1346 quant_matrix, ss, se, Al, &EOBRUN);
1348 av_log(s->avctx, AV_LOG_ERROR,
1349 "error y=%d x=%d\n", mb_y, mb_x);
1350 return AVERROR_INVALIDDATA;
1354 s->idsp.idct_put(ptr, linesize, *block);
1356 shift_output(s, ptr, linesize);
1357 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1359 if (handle_rstn(s, 0))
1366 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1367 int mb_bitmask_size, const AVFrame *reference)
1369 int len, nb_components, i, h, v, predictor, point_transform;
1371 const int block_size = s->lossless ? 1 : 8;
1372 int ilv, prev_shift;
1374 if (!s->got_picture) {
1375 av_log(s->avctx, AV_LOG_WARNING,
1376 "Can not process SOS before SOF, skipping\n");
1380 av_assert0(s->picture_ptr->data[0]);
1381 /* XXX: verify len field validity */
1382 len = get_bits(&s->gb, 16);
1383 nb_components = get_bits(&s->gb, 8);
1384 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1385 av_log(s->avctx, AV_LOG_ERROR,
1386 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1387 return AVERROR_PATCHWELCOME;
1389 if (len != 6 + 2 * nb_components) {
1390 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1391 return AVERROR_INVALIDDATA;
1393 for (i = 0; i < nb_components; i++) {
1394 id = get_bits(&s->gb, 8) - 1;
1395 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1396 /* find component index */
1397 for (index = 0; index < s->nb_components; index++)
1398 if (id == s->component_id[index])
1400 if (index == s->nb_components) {
1401 av_log(s->avctx, AV_LOG_ERROR,
1402 "decode_sos: index(%d) out of components\n", index);
1403 return AVERROR_INVALIDDATA;
1405 /* Metasoft MJPEG codec has Cb and Cr swapped */
1406 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1407 && nb_components == 3 && s->nb_components == 3 && i)
1410 s->quant_sindex[i] = s->quant_index[index];
1411 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1412 s->h_scount[i] = s->h_count[index];
1413 s->v_scount[i] = s->v_count[index];
1415 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1417 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1418 index = (index+2)%3;
1420 s->comp_index[i] = index;
1422 s->dc_index[i] = get_bits(&s->gb, 4);
1423 s->ac_index[i] = get_bits(&s->gb, 4);
1425 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1426 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1428 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))
1432 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1433 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1434 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1435 prev_shift = get_bits(&s->gb, 4); /* Ah */
1436 point_transform = get_bits(&s->gb, 4); /* Al */
1438 prev_shift = point_transform = 0;
1440 if (nb_components > 1) {
1441 /* interleaved stream */
1442 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1443 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1444 } else if (!s->ls) { /* skip this for JPEG-LS */
1445 h = s->h_max / s->h_scount[0];
1446 v = s->v_max / s->v_scount[0];
1447 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1448 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1449 s->nb_blocks[0] = 1;
1454 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1455 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1456 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1457 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1458 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1461 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1462 for (i = s->mjpb_skiptosod; i > 0; i--)
1463 skip_bits(&s->gb, 8);
1466 for (i = 0; i < nb_components; i++)
1467 s->last_dc[i] = (4 << s->bits);
1470 av_assert0(s->picture_ptr == s->picture);
1471 if (CONFIG_JPEGLS_DECODER && s->ls) {
1473 // reset_ls_coding_parameters(s, 0);
1475 if ((ret = ff_jpegls_decode_picture(s, predictor,
1476 point_transform, ilv)) < 0)
1480 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1483 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1485 nb_components)) < 0)
1490 if (s->progressive && predictor) {
1491 av_assert0(s->picture_ptr == s->picture);
1492 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1494 point_transform)) < 0)
1497 if ((ret = mjpeg_decode_scan(s, nb_components,
1498 prev_shift, point_transform,
1499 mb_bitmask, mb_bitmask_size, reference)) < 0)
1504 if (s->interlaced &&
1505 get_bits_left(&s->gb) > 32 &&
1506 show_bits(&s->gb, 8) == 0xFF) {
1507 GetBitContext bak = s->gb;
1508 align_get_bits(&bak);
1509 if (show_bits(&bak, 16) == 0xFFD1) {
1510 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1512 skip_bits(&s->gb, 16);
1513 s->bottom_field ^= 1;
1522 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1523 return AVERROR_INVALIDDATA;
1526 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1528 if (get_bits(&s->gb, 16) != 4)
1529 return AVERROR_INVALIDDATA;
1530 s->restart_interval = get_bits(&s->gb, 16);
1531 s->restart_count = 0;
1532 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1533 s->restart_interval);
1538 static int mjpeg_decode_app(MJpegDecodeContext *s)
1542 len = get_bits(&s->gb, 16);
1544 return AVERROR_INVALIDDATA;
1545 if (8 * len > get_bits_left(&s->gb))
1546 return AVERROR_INVALIDDATA;
1548 id = get_bits_long(&s->gb, 32);
1551 if (s->avctx->debug & FF_DEBUG_STARTCODE) {
1553 av_get_codec_tag_string(id_str, sizeof(id_str), av_bswap32(id));
1554 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n", id_str, id, len);
1557 /* Buggy AVID, it puts EOI only at every 10th frame. */
1558 /* Also, this fourcc is used by non-avid files too, it holds some
1559 information, but it's always present in AVID-created files. */
1560 if (id == AV_RB32("AVI1")) {
1566 4bytes field_size_less_padding
1569 i = get_bits(&s->gb, 8); len--;
1570 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1572 skip_bits(&s->gb, 8);
1573 skip_bits(&s->gb, 32);
1574 skip_bits(&s->gb, 32);
1582 if (id == AV_RB32("JFIF")) {
1583 int t_w, t_h, v1, v2;
1584 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1585 v1 = get_bits(&s->gb, 8);
1586 v2 = get_bits(&s->gb, 8);
1587 skip_bits(&s->gb, 8);
1589 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1590 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1591 ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
1593 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1594 av_log(s->avctx, AV_LOG_INFO,
1595 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1597 s->avctx->sample_aspect_ratio.num,
1598 s->avctx->sample_aspect_ratio.den);
1600 t_w = get_bits(&s->gb, 8);
1601 t_h = get_bits(&s->gb, 8);
1603 /* skip thumbnail */
1604 if (len -10 - (t_w * t_h * 3) > 0)
1605 len -= t_w * t_h * 3;
1611 if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1612 skip_bits(&s->gb, 16); /* version */
1613 skip_bits(&s->gb, 16); /* flags0 */
1614 skip_bits(&s->gb, 16); /* flags1 */
1615 s->adobe_transform = get_bits(&s->gb, 8);
1616 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1617 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1622 if (id == AV_RB32("LJIF")) {
1623 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1624 av_log(s->avctx, AV_LOG_INFO,
1625 "Pegasus lossless jpeg header found\n");
1626 skip_bits(&s->gb, 16); /* version ? */
1627 skip_bits(&s->gb, 16); /* unknown always 0? */
1628 skip_bits(&s->gb, 16); /* unknown always 0? */
1629 skip_bits(&s->gb, 16); /* unknown always 0? */
1630 switch (i=get_bits(&s->gb, 8)) {
1640 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1645 if (id == AV_RL32("colr") && len > 0) {
1646 s->colr = get_bits(&s->gb, 8);
1647 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1648 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1652 if (id == AV_RL32("xfrm") && len > 0) {
1653 s->xfrm = get_bits(&s->gb, 8);
1654 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1655 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1660 /* JPS extension by VRex */
1661 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1662 int flags, layout, type;
1663 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1664 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1666 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1667 skip_bits(&s->gb, 16); len -= 2; /* block length */
1668 skip_bits(&s->gb, 8); /* reserved */
1669 flags = get_bits(&s->gb, 8);
1670 layout = get_bits(&s->gb, 8);
1671 type = get_bits(&s->gb, 8);
1674 s->stereo3d = av_stereo3d_alloc();
1679 s->stereo3d->type = AV_STEREO3D_2D;
1680 } else if (type == 1) {
1683 s->stereo3d->type = AV_STEREO3D_LINES;
1686 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1689 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1692 if (!(flags & 0x04)) {
1693 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1700 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1701 GetByteContext gbytes;
1702 int ret, le, ifd_offset, bytes_read;
1703 const uint8_t *aligned;
1705 skip_bits(&s->gb, 16); // skip padding
1708 // init byte wise reading
1709 aligned = align_get_bits(&s->gb);
1710 bytestream2_init(&gbytes, aligned, len);
1713 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1715 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1717 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1719 // read 0th IFD and store the metadata
1720 // (return values > 0 indicate the presence of subimage metadata)
1721 ret = avpriv_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1723 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1727 bytes_read = bytestream2_tell(&gbytes);
1728 skip_bits(&s->gb, bytes_read << 3);
1735 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1736 id = get_bits_long(&s->gb, 32);
1739 if (id == AV_RB32("mjpg")) {
1741 skip_bits(&s->gb, 32); /* field size */
1742 skip_bits(&s->gb, 32); /* pad field size */
1743 skip_bits(&s->gb, 32); /* next off */
1744 skip_bits(&s->gb, 32); /* quant off */
1745 skip_bits(&s->gb, 32); /* huff off */
1746 skip_bits(&s->gb, 32); /* image off */
1747 skip_bits(&s->gb, 32); /* scan off */
1748 skip_bits(&s->gb, 32); /* data off */
1750 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1751 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1756 /* slow but needed for extreme adobe jpegs */
1758 av_log(s->avctx, AV_LOG_ERROR,
1759 "mjpeg: error, decode_app parser read over the end\n");
1761 skip_bits(&s->gb, 8);
1766 static int mjpeg_decode_com(MJpegDecodeContext *s)
1768 int len = get_bits(&s->gb, 16);
1769 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1770 char *cbuf = av_malloc(len - 1);
1773 for (i = 0; i < len - 2; i++)
1774 cbuf[i] = get_bits(&s->gb, 8);
1775 if (i > 0 && cbuf[i - 1] == '\n')
1780 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1781 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1783 /* buggy avid, it puts EOI only at every 10th frame */
1784 if (!strncmp(cbuf, "AVID", 4)) {
1785 parse_avid(s, cbuf, len);
1786 } else if (!strcmp(cbuf, "CS=ITU601"))
1788 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
1789 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1799 /* return the 8 bit start code value and update the search
1800 state. Return -1 if no start code found */
1801 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1803 const uint8_t *buf_ptr;
1808 buf_ptr = *pbuf_ptr;
1809 while (buf_end - buf_ptr > 1) {
1812 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1821 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1822 *pbuf_ptr = buf_ptr;
1826 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1827 const uint8_t **buf_ptr, const uint8_t *buf_end,
1828 const uint8_t **unescaped_buf_ptr,
1829 int *unescaped_buf_size)
1832 start_code = find_marker(buf_ptr, buf_end);
1834 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1836 return AVERROR(ENOMEM);
1838 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1839 if (start_code == SOS && !s->ls) {
1840 const uint8_t *src = *buf_ptr;
1841 uint8_t *dst = s->buffer;
1843 while (src < buf_end) {
1844 uint8_t x = *(src++);
1847 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1849 while (src < buf_end && x == 0xff)
1852 if (x >= 0xd0 && x <= 0xd7)
1859 *unescaped_buf_ptr = s->buffer;
1860 *unescaped_buf_size = dst - s->buffer;
1861 memset(s->buffer + *unescaped_buf_size, 0,
1862 FF_INPUT_BUFFER_PADDING_SIZE);
1864 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
1865 (buf_end - *buf_ptr) - (dst - s->buffer));
1866 } else if (start_code == SOS && s->ls) {
1867 const uint8_t *src = *buf_ptr;
1868 uint8_t *dst = s->buffer;
1874 while (src + t < buf_end) {
1875 uint8_t x = src[t++];
1877 while ((src + t < buf_end) && x == 0xff)
1886 init_put_bits(&pb, dst, t);
1888 /* unescape bitstream */
1890 uint8_t x = src[b++];
1891 put_bits(&pb, 8, x);
1894 put_bits(&pb, 7, x);
1898 flush_put_bits(&pb);
1900 *unescaped_buf_ptr = dst;
1901 *unescaped_buf_size = (bit_count + 7) >> 3;
1902 memset(s->buffer + *unescaped_buf_size, 0,
1903 FF_INPUT_BUFFER_PADDING_SIZE);
1905 *unescaped_buf_ptr = *buf_ptr;
1906 *unescaped_buf_size = buf_end - *buf_ptr;
1912 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1915 AVFrame *frame = data;
1916 const uint8_t *buf = avpkt->data;
1917 int buf_size = avpkt->size;
1918 MJpegDecodeContext *s = avctx->priv_data;
1919 const uint8_t *buf_end, *buf_ptr;
1920 const uint8_t *unescaped_buf_ptr;
1922 int unescaped_buf_size;
1928 av_dict_free(&s->exif_metadata);
1929 av_freep(&s->stereo3d);
1930 s->adobe_transform = -1;
1933 buf_end = buf + buf_size;
1934 while (buf_ptr < buf_end) {
1935 /* find start next marker */
1936 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1938 &unescaped_buf_size);
1940 if (start_code < 0) {
1942 } else if (unescaped_buf_size > INT_MAX / 8) {
1943 av_log(avctx, AV_LOG_ERROR,
1944 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1945 start_code, unescaped_buf_size, buf_size);
1946 return AVERROR_INVALIDDATA;
1948 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
1949 start_code, buf_end - buf_ptr);
1951 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
1954 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
1958 s->start_code = start_code;
1959 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1960 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1962 /* process markers */
1963 if (start_code >= 0xd0 && start_code <= 0xd7)
1964 av_log(avctx, AV_LOG_DEBUG,
1965 "restart marker: %d\n", start_code & 0x0f);
1967 else if (start_code >= APP0 && start_code <= APP15)
1968 mjpeg_decode_app(s);
1970 else if (start_code == COM)
1971 mjpeg_decode_com(s);
1975 if (!CONFIG_JPEGLS_DECODER &&
1976 (start_code == SOF48 || start_code == LSE)) {
1977 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
1978 return AVERROR(ENOSYS);
1981 switch (start_code) {
1983 s->restart_interval = 0;
1984 s->restart_count = 0;
1985 /* nothing to do on SOI */
1988 ff_mjpeg_decode_dqt(s);
1991 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1992 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
2001 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2008 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2015 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2022 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2026 if (!CONFIG_JPEGLS_DECODER ||
2027 (ret = ff_jpegls_decode_lse(s)) < 0)
2033 if (!s->got_picture) {
2034 av_log(avctx, AV_LOG_WARNING,
2035 "Found EOI before any SOF, ignoring\n");
2038 if (s->interlaced) {
2039 s->bottom_field ^= 1;
2040 /* if not bottom field, do not output image yet */
2041 if (s->bottom_field == !s->interlace_polarity)
2044 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2050 int qp = FFMAX3(s->qscale[0],
2053 int qpw = (s->width + 15) / 16;
2054 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2056 memset(qp_table_buf->data, qp, qpw);
2057 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2060 if(avctx->debug & FF_DEBUG_QP)
2061 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2067 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2068 (avctx->err_recognition & AV_EF_EXPLODE))
2072 mjpeg_decode_dri(s);
2084 av_log(avctx, AV_LOG_ERROR,
2085 "mjpeg: unsupported coding type (%x)\n", start_code);
2089 /* eof process start code */
2090 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2091 av_log(avctx, AV_LOG_DEBUG,
2092 "marker parser used %d bytes (%d bits)\n",
2093 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2095 if (s->got_picture && s->cur_scan) {
2096 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2099 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2100 return AVERROR_INVALIDDATA;
2106 is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step_minus1;
2110 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2111 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2112 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2113 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2114 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2115 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2116 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2117 avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2118 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2119 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2121 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2122 for (p = 0; p<4; p++) {
2123 uint8_t *line = s->picture_ptr->data[p];
2126 if (!(s->upscale_h & (1<<p)))
2129 w = FF_CEIL_RSHIFT(w, hshift);
2130 h = FF_CEIL_RSHIFT(h, vshift);
2132 if (s->upscale_v & (1<<p))
2135 for (i = 0; i < h; i++) {
2136 if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2137 else line[w - 1] = line[(w - 1) / 2];
2138 for (index = w - 2; index > 0; index--) {
2140 ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2142 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2144 line += s->linesize[p];
2150 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2151 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2152 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2153 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2154 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2155 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2156 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2157 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2158 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2159 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2160 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2162 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2163 for (p = 0; p < 4; p++) {
2167 if (!(s->upscale_v & (1<<p)))
2170 w = FF_CEIL_RSHIFT(w, hshift);
2171 h = FF_CEIL_RSHIFT(h, vshift);
2173 dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2174 for (i = h - 1; i; i--) {
2175 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2176 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2177 if (src1 == src2 || i == h - 1) {
2178 memcpy(dst, src1, w);
2180 for (index = 0; index < w; index++)
2181 dst[index] = (src1[index] + src2[index]) >> 1;
2183 dst -= s->linesize[p];
2189 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2190 for (index=0; index<4; index++) {
2191 uint8_t *dst = s->picture_ptr->data[index];
2192 int w = s->picture_ptr->width;
2193 int h = s->picture_ptr->height;
2194 if(index && index<3){
2195 w = FF_CEIL_RSHIFT(w, hshift);
2196 h = FF_CEIL_RSHIFT(h, vshift);
2199 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2200 for (i=0; i<h/2; i++) {
2202 FFSWAP(int, dst[j], dst2[j]);
2203 dst += s->picture_ptr->linesize[index];
2204 dst2 -= s->picture_ptr->linesize[index];
2209 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2210 int w = s->picture_ptr->width;
2211 int h = s->picture_ptr->height;
2212 for (i=0; i<h; i++) {
2215 for (index=0; index<4; index++) {
2216 dst[index] = s->picture_ptr->data[index]
2217 + s->picture_ptr->linesize[index]*i;
2219 for (j=0; j<w; j++) {
2221 int r = dst[0][j] * k;
2222 int g = dst[1][j] * k;
2223 int b = dst[2][j] * k;
2224 dst[0][j] = g*257 >> 16;
2225 dst[1][j] = b*257 >> 16;
2226 dst[2][j] = r*257 >> 16;
2231 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2232 int w = s->picture_ptr->width;
2233 int h = s->picture_ptr->height;
2234 for (i=0; i<h; i++) {
2237 for (index=0; index<4; index++) {
2238 dst[index] = s->picture_ptr->data[index]
2239 + s->picture_ptr->linesize[index]*i;
2241 for (j=0; j<w; j++) {
2243 int r = (255 - dst[0][j]) * k;
2244 int g = (128 - dst[1][j]) * k;
2245 int b = (128 - dst[2][j]) * k;
2246 dst[0][j] = r*257 >> 16;
2247 dst[1][j] = (g*257 >> 16) + 128;
2248 dst[2][j] = (b*257 >> 16) + 128;
2255 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2257 stereo->type = s->stereo3d->type;
2258 stereo->flags = s->stereo3d->flags;
2260 av_freep(&s->stereo3d);
2263 av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
2264 av_dict_free(&s->exif_metadata);
2266 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2268 // return buf_end - buf_ptr;
2269 return buf_ptr - buf;
2272 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2274 MJpegDecodeContext *s = avctx->priv_data;
2277 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2278 av_log(avctx, AV_LOG_INFO, "Single field\n");
2282 av_frame_free(&s->picture);
2283 s->picture_ptr = NULL;
2284 } else if (s->picture_ptr)
2285 av_frame_unref(s->picture_ptr);
2287 av_freep(&s->buffer);
2288 av_freep(&s->stereo3d);
2289 av_freep(&s->ljpeg_buffer);
2290 s->ljpeg_buffer_size = 0;
2292 for (i = 0; i < 3; i++) {
2293 for (j = 0; j < 4; j++)
2294 ff_free_vlc(&s->vlcs[i][j]);
2296 for (i = 0; i < MAX_COMPONENTS; i++) {
2297 av_freep(&s->blocks[i]);
2298 av_freep(&s->last_nnz[i]);
2300 av_dict_free(&s->exif_metadata);
2304 static void decode_flush(AVCodecContext *avctx)
2306 MJpegDecodeContext *s = avctx->priv_data;
2310 #if CONFIG_MJPEG_DECODER
2311 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2312 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2313 static const AVOption options[] = {
2314 { "extern_huff", "Use external huffman table.",
2315 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
2319 static const AVClass mjpegdec_class = {
2320 .class_name = "MJPEG decoder",
2321 .item_name = av_default_item_name,
2323 .version = LIBAVUTIL_VERSION_INT,
2326 AVCodec ff_mjpeg_decoder = {
2328 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2329 .type = AVMEDIA_TYPE_VIDEO,
2330 .id = AV_CODEC_ID_MJPEG,
2331 .priv_data_size = sizeof(MJpegDecodeContext),
2332 .init = ff_mjpeg_decode_init,
2333 .close = ff_mjpeg_decode_end,
2334 .decode = ff_mjpeg_decode_frame,
2335 .flush = decode_flush,
2336 .capabilities = CODEC_CAP_DR1,
2338 .priv_class = &mjpegdec_class,
2341 #if CONFIG_THP_DECODER
2342 AVCodec ff_thp_decoder = {
2344 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2345 .type = AVMEDIA_TYPE_VIDEO,
2346 .id = AV_CODEC_ID_THP,
2347 .priv_data_size = sizeof(MJpegDecodeContext),
2348 .init = ff_mjpeg_decode_init,
2349 .close = ff_mjpeg_decode_end,
2350 .decode = ff_mjpeg_decode_frame,
2351 .flush = decode_flush,
2352 .capabilities = CODEC_CAP_DR1,