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;
495 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
498 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
501 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
502 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
503 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
507 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
510 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
515 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
516 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
517 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
518 if (pix_fmt_id == 0x42111100) {
520 } else if (pix_fmt_id == 0x24111100) {
525 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
528 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
532 av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
533 s->upscale_h = s->upscale_v = 0;
534 return AVERROR_PATCHWELCOME;
536 if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
537 av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
538 return AVERROR_PATCHWELCOME;
541 s->upscale_h = s->upscale_v = 0;
542 if (s->nb_components > 1)
543 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
544 else if (s->palette_index && s->bits <= 8)
545 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
546 else if (s->bits <= 8)
547 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
549 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
552 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
554 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
558 av_frame_unref(s->picture_ptr);
559 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
561 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
562 s->picture_ptr->key_frame = 1;
565 for (i = 0; i < 4; i++)
566 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
568 av_dlog(s->avctx, "%d %d %d %d %d %d\n",
569 s->width, s->height, s->linesize[0], s->linesize[1],
570 s->interlaced, s->avctx->height);
572 if (len != (8 + (3 * nb_components)))
573 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
576 if (s->rgb && !s->lossless && !s->ls) {
577 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
578 return AVERROR_PATCHWELCOME;
581 /* totally blank picture as progressive JPEG will only add details to it */
582 if (s->progressive) {
583 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
584 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
585 for (i = 0; i < s->nb_components; i++) {
586 int size = bw * bh * s->h_count[i] * s->v_count[i];
587 av_freep(&s->blocks[i]);
588 av_freep(&s->last_nnz[i]);
589 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
590 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
591 if (!s->blocks[i] || !s->last_nnz[i])
592 return AVERROR(ENOMEM);
593 s->block_stride[i] = bw * s->h_count[i];
595 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
600 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
603 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
604 if (code < 0 || code > 16) {
605 av_log(s->avctx, AV_LOG_WARNING,
606 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
607 0, dc_index, &s->vlcs[0][dc_index]);
612 return get_xbits(&s->gb, code);
617 /* decode block and dequantize */
618 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
619 int dc_index, int ac_index, int16_t *quant_matrix)
621 int code, i, j, level, val;
624 val = mjpeg_decode_dc(s, dc_index);
625 if (val == 0xfffff) {
626 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
627 return AVERROR_INVALIDDATA;
629 val = val * quant_matrix[0] + s->last_dc[component];
630 s->last_dc[component] = val;
634 {OPEN_READER(re, &s->gb);
636 UPDATE_CACHE(re, &s->gb);
637 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
639 i += ((unsigned)code) >> 4;
642 if (code > MIN_CACHE_BITS - 16)
643 UPDATE_CACHE(re, &s->gb);
646 int cache = GET_CACHE(re, &s->gb);
647 int sign = (~cache) >> 31;
648 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
651 LAST_SKIP_BITS(re, &s->gb, code);
654 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
655 return AVERROR_INVALIDDATA;
657 j = s->scantable.permutated[i];
658 block[j] = level * quant_matrix[j];
661 CLOSE_READER(re, &s->gb);}
666 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
667 int component, int dc_index,
668 int16_t *quant_matrix, int Al)
671 s->bdsp.clear_block(block);
672 val = mjpeg_decode_dc(s, dc_index);
673 if (val == 0xfffff) {
674 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
675 return AVERROR_INVALIDDATA;
677 val = (val * quant_matrix[0] << Al) + s->last_dc[component];
678 s->last_dc[component] = val;
683 /* decode block and dequantize - progressive JPEG version */
684 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
685 uint8_t *last_nnz, int ac_index,
686 int16_t *quant_matrix,
687 int ss, int se, int Al, int *EOBRUN)
689 int code, i, j, level, val, run;
697 OPEN_READER(re, &s->gb);
698 for (i = ss; ; i++) {
699 UPDATE_CACHE(re, &s->gb);
700 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
702 run = ((unsigned) code) >> 4;
706 if (code > MIN_CACHE_BITS - 16)
707 UPDATE_CACHE(re, &s->gb);
710 int cache = GET_CACHE(re, &s->gb);
711 int sign = (~cache) >> 31;
712 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
715 LAST_SKIP_BITS(re, &s->gb, code);
719 j = s->scantable.permutated[se];
720 block[j] = level * quant_matrix[j] << Al;
723 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
724 return AVERROR_INVALIDDATA;
726 j = s->scantable.permutated[i];
727 block[j] = level * quant_matrix[j] << Al;
729 if (run == 0xF) {// ZRL - skip 15 coefficients
732 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
733 return AVERROR_INVALIDDATA;
738 UPDATE_CACHE(re, &s->gb);
739 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
740 LAST_SKIP_BITS(re, &s->gb, run);
747 CLOSE_READER(re, &s->gb);
756 #define REFINE_BIT(j) { \
757 UPDATE_CACHE(re, &s->gb); \
758 sign = block[j] >> 15; \
759 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
760 ((quant_matrix[j] ^ sign) - sign) << Al; \
761 LAST_SKIP_BITS(re, &s->gb, 1); \
769 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
774 j = s->scantable.permutated[i]; \
777 else if (run-- == 0) \
781 /* decode block and dequantize - progressive JPEG refinement pass */
782 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
784 int ac_index, int16_t *quant_matrix,
785 int ss, int se, int Al, int *EOBRUN)
787 int code, i = ss, j, sign, val, run;
788 int last = FFMIN(se, *last_nnz);
790 OPEN_READER(re, &s->gb);
795 UPDATE_CACHE(re, &s->gb);
796 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
799 run = ((unsigned) code) >> 4;
800 UPDATE_CACHE(re, &s->gb);
801 val = SHOW_UBITS(re, &s->gb, 1);
802 LAST_SKIP_BITS(re, &s->gb, 1);
804 j = s->scantable.permutated[i];
806 block[j] = ((quant_matrix[j]^val) - val) << Al;
810 CLOSE_READER(re, &s->gb);
814 run = ((unsigned) code) >> 4;
821 UPDATE_CACHE(re, &s->gb);
822 run += SHOW_UBITS(re, &s->gb, val);
823 LAST_SKIP_BITS(re, &s->gb, val);
835 for (; i <= last; i++) {
836 j = s->scantable.permutated[i];
840 CLOSE_READER(re, &s->gb);
847 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
852 if (s->restart_interval) {
854 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
855 align_get_bits(&s->gb);
856 for (i = 0; i < nb_components; i++) /* reset dc */
857 s->last_dc[i] = (4 << s->bits);
860 i = 8 + ((-get_bits_count(&s->gb)) & 7);
862 if (s->restart_count == 0) {
863 if( show_bits(&s->gb, i) == (1 << i) - 1
864 || show_bits(&s->gb, i) == 0xFF) {
865 int pos = get_bits_count(&s->gb);
866 align_get_bits(&s->gb);
867 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
868 skip_bits(&s->gb, 8);
869 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
870 for (i = 0; i < nb_components; i++) /* reset dc */
871 s->last_dc[i] = (4 << s->bits);
874 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
881 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
884 uint16_t (*buffer)[4];
885 int left[4], top[4], topleft[4];
886 const int linesize = s->linesize[0];
887 const int mask = ((1 << s->bits) - 1) << point_transform;
891 if (s->nb_components != 3 && s->nb_components != 4)
892 return AVERROR_INVALIDDATA;
893 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
894 return AVERROR_INVALIDDATA;
897 s->restart_count = s->restart_interval;
899 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
900 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
901 buffer = s->ljpeg_buffer;
903 for (i = 0; i < 4; i++)
904 buffer[0][i] = 1 << (s->bits - 1);
906 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
907 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
909 if (s->interlaced && s->bottom_field)
910 ptr += linesize >> 1;
912 for (i = 0; i < 4; i++)
913 top[i] = left[i] = topleft[i] = buffer[0][i];
915 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
916 int modified_predictor = predictor;
918 if (s->restart_interval && !s->restart_count){
919 s->restart_count = s->restart_interval;
923 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
925 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
926 modified_predictor = 1;
928 for (i=0;i<nb_components;i++) {
932 top[i] = buffer[mb_x][i];
934 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
936 dc = mjpeg_decode_dc(s, s->dc_index[i]);
940 left[i] = buffer[mb_x][i] =
941 mask & (pred + (dc << point_transform));
944 if (s->restart_interval && !--s->restart_count) {
945 align_get_bits(&s->gb);
946 skip_bits(&s->gb, 16); /* skip RSTn */
949 if (s->nb_components == 4) {
950 for(i=0; i<nb_components; i++) {
951 int c= s->comp_index[i];
953 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
954 ptr[4*mb_x+3-c] = buffer[mb_x][i];
956 } else if(s->bits == 9) {
957 return AVERROR_PATCHWELCOME;
959 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
960 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
965 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
966 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
967 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
968 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
970 } else if (s->pegasus_rct) {
971 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
972 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
973 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
974 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
977 for(i=0; i<nb_components; i++) {
978 int c= s->comp_index[i];
980 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
981 ptr[3*mb_x+2-c] = buffer[mb_x][i];
983 } else if(s->bits == 9) {
984 return AVERROR_PATCHWELCOME;
986 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
987 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
996 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
997 int point_transform, int nb_components)
999 int i, mb_x, mb_y, mask;
1000 int bits= (s->bits+7)&~7;
1001 int resync_mb_y = 0;
1002 int resync_mb_x = 0;
1004 point_transform += bits - s->bits;
1005 mask = ((1 << s->bits) - 1) << point_transform;
1007 av_assert0(nb_components>=1 && nb_components<=4);
1009 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1010 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1011 if (s->restart_interval && !s->restart_count){
1012 s->restart_count = s->restart_interval;
1017 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1018 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1019 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1020 for (i = 0; i < nb_components; i++) {
1023 int n, h, v, x, y, c, j, linesize;
1024 n = s->nb_blocks[i];
1025 c = s->comp_index[i];
1030 linesize= s->linesize[c];
1032 if(bits>8) linesize /= 2;
1034 for(j=0; j<n; j++) {
1037 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1041 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1043 if(x==0 && leftcol){
1044 pred= 1 << (bits - 1);
1049 if(x==0 && leftcol){
1050 pred= ptr[-linesize];
1052 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1056 if (s->interlaced && s->bottom_field)
1057 ptr += linesize >> 1;
1059 *ptr= pred + (dc << point_transform);
1061 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1063 if(x==0 && leftcol){
1064 pred= 1 << (bits - 1);
1069 if(x==0 && leftcol){
1070 pred= ptr16[-linesize];
1072 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1076 if (s->interlaced && s->bottom_field)
1077 ptr16 += linesize >> 1;
1079 *ptr16= pred + (dc << point_transform);
1088 for (i = 0; i < nb_components; i++) {
1091 int n, h, v, x, y, c, j, linesize, dc;
1092 n = s->nb_blocks[i];
1093 c = s->comp_index[i];
1098 linesize = s->linesize[c];
1100 if(bits>8) linesize /= 2;
1102 for (j = 0; j < n; j++) {
1105 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1109 ptr = s->picture_ptr->data[c] +
1110 (linesize * (v * mb_y + y)) +
1111 (h * mb_x + x); //FIXME optimize this crap
1112 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1115 *ptr = pred + (dc << point_transform);
1117 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1118 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1121 *ptr16= pred + (dc << point_transform);
1131 if (s->restart_interval && !--s->restart_count) {
1132 align_get_bits(&s->gb);
1133 skip_bits(&s->gb, 16); /* skip RSTn */
1140 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1141 uint8_t *dst, const uint8_t *src,
1142 int linesize, int lowres)
1145 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1147 case 1: copy_block4(dst, src, linesize, linesize, 4);
1149 case 2: copy_block2(dst, src, linesize, linesize, 2);
1151 case 3: *dst = *src;
1156 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1158 int block_x, block_y;
1159 int size = 8 >> s->avctx->lowres;
1161 for (block_y=0; block_y<size; block_y++)
1162 for (block_x=0; block_x<size; block_x++)
1163 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1165 for (block_y=0; block_y<size; block_y++)
1166 for (block_x=0; block_x<size; block_x++)
1167 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1171 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1172 int Al, const uint8_t *mb_bitmask,
1173 int mb_bitmask_size,
1174 const AVFrame *reference)
1177 uint8_t *data[MAX_COMPONENTS];
1178 const uint8_t *reference_data[MAX_COMPONENTS];
1179 int linesize[MAX_COMPONENTS];
1180 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1181 int bytes_per_pixel = 1 + (s->bits > 8);
1184 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1185 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1186 return AVERROR_INVALIDDATA;
1188 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1191 s->restart_count = 0;
1193 for (i = 0; i < nb_components; i++) {
1194 int c = s->comp_index[i];
1195 data[c] = s->picture_ptr->data[c];
1196 reference_data[c] = reference ? reference->data[c] : NULL;
1197 linesize[c] = s->linesize[c];
1198 s->coefs_finished[c] |= 1;
1201 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1202 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1203 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1205 if (s->restart_interval && !s->restart_count)
1206 s->restart_count = s->restart_interval;
1208 if (get_bits_left(&s->gb) < 0) {
1209 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1210 -get_bits_left(&s->gb));
1211 return AVERROR_INVALIDDATA;
1213 for (i = 0; i < nb_components; i++) {
1215 int n, h, v, x, y, c, j;
1217 n = s->nb_blocks[i];
1218 c = s->comp_index[i];
1223 for (j = 0; j < n; j++) {
1224 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1225 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1227 if (s->interlaced && s->bottom_field)
1228 block_offset += linesize[c] >> 1;
1229 ptr = data[c] + block_offset;
1230 if (!s->progressive) {
1232 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1233 linesize[c], s->avctx->lowres);
1236 s->bdsp.clear_block(s->block);
1237 if (decode_block(s, s->block, i,
1238 s->dc_index[i], s->ac_index[i],
1239 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1240 av_log(s->avctx, AV_LOG_ERROR,
1241 "error y=%d x=%d\n", mb_y, mb_x);
1242 return AVERROR_INVALIDDATA;
1244 s->idsp.idct_put(ptr, linesize[c], s->block);
1246 shift_output(s, ptr, linesize[c]);
1249 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1251 int16_t *block = s->blocks[c][block_idx];
1253 block[0] += get_bits1(&s->gb) *
1254 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1255 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1256 s->quant_matrixes[s->quant_sindex[i]],
1258 av_log(s->avctx, AV_LOG_ERROR,
1259 "error y=%d x=%d\n", mb_y, mb_x);
1260 return AVERROR_INVALIDDATA;
1263 av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1264 av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1265 mb_x, mb_y, x, y, c, s->bottom_field,
1266 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1274 handle_rstn(s, nb_components);
1280 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1281 int se, int Ah, int Al)
1285 int c = s->comp_index[0];
1286 uint8_t *data = s->picture_ptr->data[c];
1287 int linesize = s->linesize[c];
1289 int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1290 int bytes_per_pixel = 1 + (s->bits > 8);
1292 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1293 if (se < ss || se > 63) {
1294 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1295 return AVERROR_INVALIDDATA;
1299 // s->coefs_finished is a bitmask for coefficients coded
1300 // ss and se are parameters telling start and end coefficients
1301 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1302 last_scan = !~s->coefs_finished[c];
1305 if (s->interlaced && s->bottom_field)
1306 data += linesize >> 1;
1308 s->restart_count = 0;
1310 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1311 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1312 int block_idx = mb_y * s->block_stride[c];
1313 int16_t (*block)[64] = &s->blocks[c][block_idx];
1314 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1315 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1317 if (s->restart_interval && !s->restart_count)
1318 s->restart_count = s->restart_interval;
1321 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1322 quant_matrix, ss, se, Al, &EOBRUN);
1324 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1325 quant_matrix, ss, se, Al, &EOBRUN);
1327 av_log(s->avctx, AV_LOG_ERROR,
1328 "error y=%d x=%d\n", mb_y, mb_x);
1329 return AVERROR_INVALIDDATA;
1333 s->idsp.idct_put(ptr, linesize, *block);
1335 shift_output(s, ptr, linesize);
1336 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1338 if (handle_rstn(s, 0))
1345 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1346 int mb_bitmask_size, const AVFrame *reference)
1348 int len, nb_components, i, h, v, predictor, point_transform;
1350 const int block_size = s->lossless ? 1 : 8;
1351 int ilv, prev_shift;
1353 if (!s->got_picture) {
1354 av_log(s->avctx, AV_LOG_WARNING,
1355 "Can not process SOS before SOF, skipping\n");
1359 av_assert0(s->picture_ptr->data[0]);
1360 /* XXX: verify len field validity */
1361 len = get_bits(&s->gb, 16);
1362 nb_components = get_bits(&s->gb, 8);
1363 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1364 av_log(s->avctx, AV_LOG_ERROR,
1365 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1366 return AVERROR_PATCHWELCOME;
1368 if (len != 6 + 2 * nb_components) {
1369 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1370 return AVERROR_INVALIDDATA;
1372 for (i = 0; i < nb_components; i++) {
1373 id = get_bits(&s->gb, 8) - 1;
1374 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1375 /* find component index */
1376 for (index = 0; index < s->nb_components; index++)
1377 if (id == s->component_id[index])
1379 if (index == s->nb_components) {
1380 av_log(s->avctx, AV_LOG_ERROR,
1381 "decode_sos: index(%d) out of components\n", index);
1382 return AVERROR_INVALIDDATA;
1384 /* Metasoft MJPEG codec has Cb and Cr swapped */
1385 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1386 && nb_components == 3 && s->nb_components == 3 && i)
1389 s->quant_sindex[i] = s->quant_index[index];
1390 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1391 s->h_scount[i] = s->h_count[index];
1392 s->v_scount[i] = s->v_count[index];
1394 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1396 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1397 index = (index+2)%3;
1399 s->comp_index[i] = index;
1401 s->dc_index[i] = get_bits(&s->gb, 4);
1402 s->ac_index[i] = get_bits(&s->gb, 4);
1404 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1405 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1407 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))
1411 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1412 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1413 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1414 prev_shift = get_bits(&s->gb, 4); /* Ah */
1415 point_transform = get_bits(&s->gb, 4); /* Al */
1417 prev_shift = point_transform = 0;
1419 if (nb_components > 1) {
1420 /* interleaved stream */
1421 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1422 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1423 } else if (!s->ls) { /* skip this for JPEG-LS */
1424 h = s->h_max / s->h_scount[0];
1425 v = s->v_max / s->v_scount[0];
1426 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1427 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1428 s->nb_blocks[0] = 1;
1433 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1434 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1435 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1436 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1437 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1440 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1441 for (i = s->mjpb_skiptosod; i > 0; i--)
1442 skip_bits(&s->gb, 8);
1445 for (i = 0; i < nb_components; i++)
1446 s->last_dc[i] = (4 << s->bits);
1449 av_assert0(s->picture_ptr == s->picture);
1450 if (CONFIG_JPEGLS_DECODER && s->ls) {
1452 // reset_ls_coding_parameters(s, 0);
1454 if ((ret = ff_jpegls_decode_picture(s, predictor,
1455 point_transform, ilv)) < 0)
1459 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1462 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1464 nb_components)) < 0)
1469 if (s->progressive && predictor) {
1470 av_assert0(s->picture_ptr == s->picture);
1471 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1473 point_transform)) < 0)
1476 if ((ret = mjpeg_decode_scan(s, nb_components,
1477 prev_shift, point_transform,
1478 mb_bitmask, mb_bitmask_size, reference)) < 0)
1483 if (s->interlaced &&
1484 get_bits_left(&s->gb) > 32 &&
1485 show_bits(&s->gb, 8) == 0xFF) {
1486 GetBitContext bak = s->gb;
1487 align_get_bits(&bak);
1488 if (show_bits(&bak, 16) == 0xFFD1) {
1489 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1491 skip_bits(&s->gb, 16);
1492 s->bottom_field ^= 1;
1501 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1502 return AVERROR_INVALIDDATA;
1505 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1507 if (get_bits(&s->gb, 16) != 4)
1508 return AVERROR_INVALIDDATA;
1509 s->restart_interval = get_bits(&s->gb, 16);
1510 s->restart_count = 0;
1511 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1512 s->restart_interval);
1517 static int mjpeg_decode_app(MJpegDecodeContext *s)
1521 len = get_bits(&s->gb, 16);
1523 return AVERROR_INVALIDDATA;
1524 if (8 * len > get_bits_left(&s->gb))
1525 return AVERROR_INVALIDDATA;
1527 id = get_bits_long(&s->gb, 32);
1530 if (s->avctx->debug & FF_DEBUG_STARTCODE) {
1532 av_get_codec_tag_string(id_str, sizeof(id_str), av_bswap32(id));
1533 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n", id_str, id, len);
1536 /* Buggy AVID, it puts EOI only at every 10th frame. */
1537 /* Also, this fourcc is used by non-avid files too, it holds some
1538 information, but it's always present in AVID-created files. */
1539 if (id == AV_RB32("AVI1")) {
1545 4bytes field_size_less_padding
1548 i = get_bits(&s->gb, 8); len--;
1549 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1551 skip_bits(&s->gb, 8);
1552 skip_bits(&s->gb, 32);
1553 skip_bits(&s->gb, 32);
1561 if (id == AV_RB32("JFIF")) {
1562 int t_w, t_h, v1, v2;
1563 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1564 v1 = get_bits(&s->gb, 8);
1565 v2 = get_bits(&s->gb, 8);
1566 skip_bits(&s->gb, 8);
1568 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1569 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1570 ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
1572 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1573 av_log(s->avctx, AV_LOG_INFO,
1574 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1576 s->avctx->sample_aspect_ratio.num,
1577 s->avctx->sample_aspect_ratio.den);
1579 t_w = get_bits(&s->gb, 8);
1580 t_h = get_bits(&s->gb, 8);
1582 /* skip thumbnail */
1583 if (len -10 - (t_w * t_h * 3) > 0)
1584 len -= t_w * t_h * 3;
1590 if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1591 skip_bits(&s->gb, 16); /* version */
1592 skip_bits(&s->gb, 16); /* flags0 */
1593 skip_bits(&s->gb, 16); /* flags1 */
1594 s->adobe_transform = get_bits(&s->gb, 8);
1595 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1596 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1601 if (id == AV_RB32("LJIF")) {
1602 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1603 av_log(s->avctx, AV_LOG_INFO,
1604 "Pegasus lossless jpeg header found\n");
1605 skip_bits(&s->gb, 16); /* version ? */
1606 skip_bits(&s->gb, 16); /* unknown always 0? */
1607 skip_bits(&s->gb, 16); /* unknown always 0? */
1608 skip_bits(&s->gb, 16); /* unknown always 0? */
1609 switch (i=get_bits(&s->gb, 8)) {
1619 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1624 if (id == AV_RL32("colr") && len > 0) {
1625 s->colr = get_bits(&s->gb, 8);
1626 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1627 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1631 if (id == AV_RL32("xfrm") && len > 0) {
1632 s->xfrm = get_bits(&s->gb, 8);
1633 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1634 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1639 /* JPS extension by VRex */
1640 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1641 int flags, layout, type;
1642 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1643 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1645 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1646 skip_bits(&s->gb, 16); len -= 2; /* block length */
1647 skip_bits(&s->gb, 8); /* reserved */
1648 flags = get_bits(&s->gb, 8);
1649 layout = get_bits(&s->gb, 8);
1650 type = get_bits(&s->gb, 8);
1653 s->stereo3d = av_stereo3d_alloc();
1658 s->stereo3d->type = AV_STEREO3D_2D;
1659 } else if (type == 1) {
1662 s->stereo3d->type = AV_STEREO3D_LINES;
1665 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1668 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1671 if (!(flags & 0x04)) {
1672 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1679 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1680 GetByteContext gbytes;
1681 int ret, le, ifd_offset, bytes_read;
1682 const uint8_t *aligned;
1684 skip_bits(&s->gb, 16); // skip padding
1687 // init byte wise reading
1688 aligned = align_get_bits(&s->gb);
1689 bytestream2_init(&gbytes, aligned, len);
1692 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1694 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1696 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1698 // read 0th IFD and store the metadata
1699 // (return values > 0 indicate the presence of subimage metadata)
1700 ret = avpriv_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1702 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1706 bytes_read = bytestream2_tell(&gbytes);
1707 skip_bits(&s->gb, bytes_read << 3);
1714 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1715 id = get_bits_long(&s->gb, 32);
1718 if (id == AV_RB32("mjpg")) {
1720 skip_bits(&s->gb, 32); /* field size */
1721 skip_bits(&s->gb, 32); /* pad field size */
1722 skip_bits(&s->gb, 32); /* next off */
1723 skip_bits(&s->gb, 32); /* quant off */
1724 skip_bits(&s->gb, 32); /* huff off */
1725 skip_bits(&s->gb, 32); /* image off */
1726 skip_bits(&s->gb, 32); /* scan off */
1727 skip_bits(&s->gb, 32); /* data off */
1729 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1730 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1735 /* slow but needed for extreme adobe jpegs */
1737 av_log(s->avctx, AV_LOG_ERROR,
1738 "mjpeg: error, decode_app parser read over the end\n");
1740 skip_bits(&s->gb, 8);
1745 static int mjpeg_decode_com(MJpegDecodeContext *s)
1747 int len = get_bits(&s->gb, 16);
1748 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1749 char *cbuf = av_malloc(len - 1);
1752 for (i = 0; i < len - 2; i++)
1753 cbuf[i] = get_bits(&s->gb, 8);
1754 if (i > 0 && cbuf[i - 1] == '\n')
1759 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1760 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1762 /* buggy avid, it puts EOI only at every 10th frame */
1763 if (!strncmp(cbuf, "AVID", 4)) {
1764 parse_avid(s, cbuf, len);
1765 } else if (!strcmp(cbuf, "CS=ITU601"))
1767 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
1768 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1778 /* return the 8 bit start code value and update the search
1779 state. Return -1 if no start code found */
1780 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1782 const uint8_t *buf_ptr;
1787 buf_ptr = *pbuf_ptr;
1788 while (buf_end - buf_ptr > 1) {
1791 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1800 av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1801 *pbuf_ptr = buf_ptr;
1805 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1806 const uint8_t **buf_ptr, const uint8_t *buf_end,
1807 const uint8_t **unescaped_buf_ptr,
1808 int *unescaped_buf_size)
1811 start_code = find_marker(buf_ptr, buf_end);
1813 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1815 return AVERROR(ENOMEM);
1817 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1818 if (start_code == SOS && !s->ls) {
1819 const uint8_t *src = *buf_ptr;
1820 uint8_t *dst = s->buffer;
1822 while (src < buf_end) {
1823 uint8_t x = *(src++);
1826 if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1828 while (src < buf_end && x == 0xff)
1831 if (x >= 0xd0 && x <= 0xd7)
1838 *unescaped_buf_ptr = s->buffer;
1839 *unescaped_buf_size = dst - s->buffer;
1840 memset(s->buffer + *unescaped_buf_size, 0,
1841 FF_INPUT_BUFFER_PADDING_SIZE);
1843 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
1844 (buf_end - *buf_ptr) - (dst - s->buffer));
1845 } else if (start_code == SOS && s->ls) {
1846 const uint8_t *src = *buf_ptr;
1847 uint8_t *dst = s->buffer;
1853 while (src + t < buf_end) {
1854 uint8_t x = src[t++];
1856 while ((src + t < buf_end) && x == 0xff)
1865 init_put_bits(&pb, dst, t);
1867 /* unescape bitstream */
1869 uint8_t x = src[b++];
1870 put_bits(&pb, 8, x);
1873 put_bits(&pb, 7, x);
1877 flush_put_bits(&pb);
1879 *unescaped_buf_ptr = dst;
1880 *unescaped_buf_size = (bit_count + 7) >> 3;
1881 memset(s->buffer + *unescaped_buf_size, 0,
1882 FF_INPUT_BUFFER_PADDING_SIZE);
1884 *unescaped_buf_ptr = *buf_ptr;
1885 *unescaped_buf_size = buf_end - *buf_ptr;
1891 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1894 AVFrame *frame = data;
1895 const uint8_t *buf = avpkt->data;
1896 int buf_size = avpkt->size;
1897 MJpegDecodeContext *s = avctx->priv_data;
1898 const uint8_t *buf_end, *buf_ptr;
1899 const uint8_t *unescaped_buf_ptr;
1901 int unescaped_buf_size;
1907 av_dict_free(&s->exif_metadata);
1908 av_freep(&s->stereo3d);
1909 s->adobe_transform = -1;
1912 buf_end = buf + buf_size;
1913 while (buf_ptr < buf_end) {
1914 /* find start next marker */
1915 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1917 &unescaped_buf_size);
1919 if (start_code < 0) {
1921 } else if (unescaped_buf_size > INT_MAX / 8) {
1922 av_log(avctx, AV_LOG_ERROR,
1923 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
1924 start_code, unescaped_buf_size, buf_size);
1925 return AVERROR_INVALIDDATA;
1927 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
1928 start_code, buf_end - buf_ptr);
1930 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
1933 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
1937 s->start_code = start_code;
1938 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1939 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1941 /* process markers */
1942 if (start_code >= 0xd0 && start_code <= 0xd7)
1943 av_log(avctx, AV_LOG_DEBUG,
1944 "restart marker: %d\n", start_code & 0x0f);
1946 else if (start_code >= APP0 && start_code <= APP15)
1947 mjpeg_decode_app(s);
1949 else if (start_code == COM)
1950 mjpeg_decode_com(s);
1954 if (!CONFIG_JPEGLS_DECODER &&
1955 (start_code == SOF48 || start_code == LSE)) {
1956 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
1957 return AVERROR(ENOSYS);
1960 switch (start_code) {
1962 s->restart_interval = 0;
1963 s->restart_count = 0;
1964 /* nothing to do on SOI */
1967 ff_mjpeg_decode_dqt(s);
1970 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1971 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1980 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1987 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1994 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2001 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2005 if (!CONFIG_JPEGLS_DECODER ||
2006 (ret = ff_jpegls_decode_lse(s)) < 0)
2012 if (!s->got_picture) {
2013 av_log(avctx, AV_LOG_WARNING,
2014 "Found EOI before any SOF, ignoring\n");
2017 if (s->interlaced) {
2018 s->bottom_field ^= 1;
2019 /* if not bottom field, do not output image yet */
2020 if (s->bottom_field == !s->interlace_polarity)
2023 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2029 int qp = FFMAX3(s->qscale[0],
2032 int qpw = (s->width + 15) / 16;
2033 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2035 memset(qp_table_buf->data, qp, qpw);
2036 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2039 if(avctx->debug & FF_DEBUG_QP)
2040 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2046 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2047 (avctx->err_recognition & AV_EF_EXPLODE))
2051 mjpeg_decode_dri(s);
2063 av_log(avctx, AV_LOG_ERROR,
2064 "mjpeg: unsupported coding type (%x)\n", start_code);
2068 /* eof process start code */
2069 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2070 av_log(avctx, AV_LOG_DEBUG,
2071 "marker parser used %d bytes (%d bits)\n",
2072 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2074 if (s->got_picture && s->cur_scan) {
2075 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2078 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2079 return AVERROR_INVALIDDATA;
2085 is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step_minus1;
2089 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2090 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2091 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2092 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2093 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2094 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2095 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2096 avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2097 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2099 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2100 for (p = 0; p<4; p++) {
2101 uint8_t *line = s->picture_ptr->data[p];
2104 if (!(s->upscale_h & (1<<p)))
2107 w = FF_CEIL_RSHIFT(w, hshift);
2108 h = FF_CEIL_RSHIFT(h, vshift);
2110 if (s->upscale_v & (1<<p))
2113 for (i = 0; i < h; i++) {
2114 if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2115 else line[w - 1] = line[(w - 1) / 2];
2116 for (index = w - 2; index > 0; index--) {
2118 ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2120 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2122 line += s->linesize[p];
2128 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2129 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2130 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2131 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2132 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2133 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2134 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2135 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2137 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2138 for (p = 0; p < 4; p++) {
2142 if (!(s->upscale_v & (1<<p)))
2145 w = FF_CEIL_RSHIFT(w, hshift);
2146 h = FF_CEIL_RSHIFT(h, vshift);
2148 dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2149 for (i = h - 1; i; i--) {
2150 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2151 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2152 if (src1 == src2 || i == h - 1) {
2153 memcpy(dst, src1, w);
2155 for (index = 0; index < w; index++)
2156 dst[index] = (src1[index] + src2[index]) >> 1;
2158 dst -= s->linesize[p];
2164 avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2165 for (index=0; index<4; index++) {
2166 uint8_t *dst = s->picture_ptr->data[index];
2167 int w = s->picture_ptr->width;
2168 int h = s->picture_ptr->height;
2169 if(index && index<3){
2170 w = FF_CEIL_RSHIFT(w, hshift);
2171 h = FF_CEIL_RSHIFT(h, vshift);
2174 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2175 for (i=0; i<h/2; i++) {
2177 FFSWAP(int, dst[j], dst2[j]);
2178 dst += s->picture_ptr->linesize[index];
2179 dst2 -= s->picture_ptr->linesize[index];
2184 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2185 int w = s->picture_ptr->width;
2186 int h = s->picture_ptr->height;
2187 for (i=0; i<h; i++) {
2190 for (index=0; index<4; index++) {
2191 dst[index] = s->picture_ptr->data[index]
2192 + s->picture_ptr->linesize[index]*i;
2194 for (j=0; j<w; j++) {
2196 int r = dst[0][j] * k;
2197 int g = dst[1][j] * k;
2198 int b = dst[2][j] * k;
2199 dst[0][j] = g*257 >> 16;
2200 dst[1][j] = b*257 >> 16;
2201 dst[2][j] = r*257 >> 16;
2206 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2207 int w = s->picture_ptr->width;
2208 int h = s->picture_ptr->height;
2209 for (i=0; i<h; i++) {
2212 for (index=0; index<4; index++) {
2213 dst[index] = s->picture_ptr->data[index]
2214 + s->picture_ptr->linesize[index]*i;
2216 for (j=0; j<w; j++) {
2218 int r = (255 - dst[0][j]) * k;
2219 int g = (128 - dst[1][j]) * k;
2220 int b = (128 - dst[2][j]) * k;
2221 dst[0][j] = r*257 >> 16;
2222 dst[1][j] = (g*257 >> 16) + 128;
2223 dst[2][j] = (b*257 >> 16) + 128;
2230 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2232 stereo->type = s->stereo3d->type;
2233 stereo->flags = s->stereo3d->flags;
2235 av_freep(&s->stereo3d);
2238 av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
2239 av_dict_free(&s->exif_metadata);
2241 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2243 // return buf_end - buf_ptr;
2244 return buf_ptr - buf;
2247 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2249 MJpegDecodeContext *s = avctx->priv_data;
2252 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2253 av_log(avctx, AV_LOG_INFO, "Single field\n");
2257 av_frame_free(&s->picture);
2258 s->picture_ptr = NULL;
2259 } else if (s->picture_ptr)
2260 av_frame_unref(s->picture_ptr);
2262 av_freep(&s->buffer);
2263 av_freep(&s->stereo3d);
2264 av_freep(&s->ljpeg_buffer);
2265 s->ljpeg_buffer_size = 0;
2267 for (i = 0; i < 3; i++) {
2268 for (j = 0; j < 4; j++)
2269 ff_free_vlc(&s->vlcs[i][j]);
2271 for (i = 0; i < MAX_COMPONENTS; i++) {
2272 av_freep(&s->blocks[i]);
2273 av_freep(&s->last_nnz[i]);
2275 av_dict_free(&s->exif_metadata);
2279 static void decode_flush(AVCodecContext *avctx)
2281 MJpegDecodeContext *s = avctx->priv_data;
2285 #if CONFIG_MJPEG_DECODER
2286 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2287 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2288 static const AVOption options[] = {
2289 { "extern_huff", "Use external huffman table.",
2290 OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
2294 static const AVClass mjpegdec_class = {
2295 .class_name = "MJPEG decoder",
2296 .item_name = av_default_item_name,
2298 .version = LIBAVUTIL_VERSION_INT,
2301 AVCodec ff_mjpeg_decoder = {
2303 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2304 .type = AVMEDIA_TYPE_VIDEO,
2305 .id = AV_CODEC_ID_MJPEG,
2306 .priv_data_size = sizeof(MJpegDecodeContext),
2307 .init = ff_mjpeg_decode_init,
2308 .close = ff_mjpeg_decode_end,
2309 .decode = ff_mjpeg_decode_frame,
2310 .flush = decode_flush,
2311 .capabilities = CODEC_CAP_DR1,
2313 .priv_class = &mjpegdec_class,
2316 #if CONFIG_THP_DECODER
2317 AVCodec ff_thp_decoder = {
2319 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2320 .type = AVMEDIA_TYPE_VIDEO,
2321 .id = AV_CODEC_ID_THP,
2322 .priv_data_size = sizeof(MJpegDecodeContext),
2323 .init = ff_mjpeg_decode_init,
2324 .close = ff_mjpeg_decode_end,
2325 .decode = ff_mjpeg_decode_frame,
2326 .flush = decode_flush,
2327 .capabilities = CODEC_CAP_DR1,