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"
42 #include "jpegtables.h"
45 #include "jpeglsdec.h"
49 #include "bytestream.h"
52 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
53 const uint8_t *val_table, int nb_codes,
54 int use_static, int is_ac)
56 uint8_t huff_size[256] = { 0 };
57 uint16_t huff_code[256];
58 uint16_t huff_sym[256];
61 av_assert0(nb_codes <= 256);
63 ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
65 for (i = 0; i < 256; i++)
66 huff_sym[i] = i + 16 * is_ac;
69 huff_sym[0] = 16 * 256;
71 return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
72 huff_code, 2, 2, huff_sym, 2, 2, use_static);
75 static int build_basic_mjpeg_vlc(MJpegDecodeContext *s)
79 if ((ret = build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
80 avpriv_mjpeg_val_dc, 12, 0, 0)) < 0)
83 if ((ret = build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
84 avpriv_mjpeg_val_dc, 12, 0, 0)) < 0)
87 if ((ret = build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
88 avpriv_mjpeg_val_ac_luminance, 251, 0, 1)) < 0)
91 if ((ret = build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
92 avpriv_mjpeg_val_ac_chrominance, 251, 0, 1)) < 0)
95 if ((ret = build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
96 avpriv_mjpeg_val_ac_luminance, 251, 0, 0)) < 0)
99 if ((ret = build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
100 avpriv_mjpeg_val_ac_chrominance, 251, 0, 0)) < 0)
107 static void parse_avid(MJpegDecodeContext *s, uint8_t *buf, int len)
110 if (len > 14 && buf[12] == 1) /* 1 - NTSC */
111 s->interlace_polarity = 1;
112 if (len > 14 && buf[12] == 2) /* 2 - PAL */
113 s->interlace_polarity = 0;
114 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
115 av_log(s->avctx, AV_LOG_INFO, "AVID: len:%d %d\n", len, len > 14 ? buf[12] : -1);
118 static void init_idct(AVCodecContext *avctx)
120 MJpegDecodeContext *s = avctx->priv_data;
122 ff_idctdsp_init(&s->idsp, avctx);
123 ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
127 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
129 MJpegDecodeContext *s = avctx->priv_data;
132 if (!s->picture_ptr) {
133 s->picture = av_frame_alloc();
135 return AVERROR(ENOMEM);
136 s->picture_ptr = s->picture;
140 ff_blockdsp_init(&s->bdsp, avctx);
141 ff_hpeldsp_init(&s->hdsp, avctx->flags);
146 s->first_picture = 1;
148 s->org_height = avctx->coded_height;
149 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
150 avctx->colorspace = AVCOL_SPC_BT470BG;
151 s->hwaccel_pix_fmt = s->hwaccel_sw_pix_fmt = AV_PIX_FMT_NONE;
153 if ((ret = build_basic_mjpeg_vlc(s)) < 0)
156 if (s->extern_huff) {
157 av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
158 if ((ret = init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8)) < 0)
160 if (ff_mjpeg_decode_dht(s)) {
161 av_log(avctx, AV_LOG_ERROR,
162 "error using external huffman table, switching back to internal\n");
163 build_basic_mjpeg_vlc(s);
166 if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
167 s->interlace_polarity = 1; /* bottom field first */
168 av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
169 } else if (avctx->field_order == AV_FIELD_UNKNOWN) {
170 if (avctx->codec_tag == AV_RL32("MJPG"))
171 s->interlace_polarity = 1;
174 if ( avctx->extradata_size > 8
175 && AV_RL32(avctx->extradata) == 0x2C
176 && AV_RL32(avctx->extradata+4) == 0x18) {
177 parse_avid(s, avctx->extradata, avctx->extradata_size);
180 if (avctx->codec->id == AV_CODEC_ID_AMV)
187 /* quantize tables */
188 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
192 len = get_bits(&s->gb, 16) - 2;
194 if (8*len > get_bits_left(&s->gb)) {
195 av_log(s->avctx, AV_LOG_ERROR, "dqt: len %d is too large\n", len);
196 return AVERROR_INVALIDDATA;
200 int pr = get_bits(&s->gb, 4);
202 av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
203 return AVERROR_INVALIDDATA;
205 index = get_bits(&s->gb, 4);
208 av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
209 /* read quant table */
210 for (i = 0; i < 64; i++) {
211 s->quant_matrixes[index][i] = get_bits(&s->gb, pr ? 16 : 8);
212 if (s->quant_matrixes[index][i] == 0) {
213 av_log(s->avctx, AV_LOG_ERROR, "dqt: 0 quant value\n");
214 return AVERROR_INVALIDDATA;
218 // XXX FIXME fine-tune, and perhaps add dc too
219 s->qscale[index] = FFMAX(s->quant_matrixes[index][1],
220 s->quant_matrixes[index][8]) >> 1;
221 av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
222 index, s->qscale[index]);
223 len -= 1 + 64 * (1+pr);
228 /* decode huffman tables and build VLC decoders */
229 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
231 int len, index, i, class, n, v, code_max;
232 uint8_t bits_table[17];
233 uint8_t val_table[256];
236 len = get_bits(&s->gb, 16) - 2;
238 if (8*len > get_bits_left(&s->gb)) {
239 av_log(s->avctx, AV_LOG_ERROR, "dht: len %d is too large\n", len);
240 return AVERROR_INVALIDDATA;
245 return AVERROR_INVALIDDATA;
246 class = get_bits(&s->gb, 4);
248 return AVERROR_INVALIDDATA;
249 index = get_bits(&s->gb, 4);
251 return AVERROR_INVALIDDATA;
253 for (i = 1; i <= 16; i++) {
254 bits_table[i] = get_bits(&s->gb, 8);
258 if (len < n || n > 256)
259 return AVERROR_INVALIDDATA;
262 for (i = 0; i < n; i++) {
263 v = get_bits(&s->gb, 8);
270 /* build VLC and flush previous vlc if present */
271 ff_free_vlc(&s->vlcs[class][index]);
272 av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
273 class, index, code_max + 1);
274 if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
275 code_max + 1, 0, class > 0)) < 0)
279 ff_free_vlc(&s->vlcs[2][index]);
280 if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
281 code_max + 1, 0, 0)) < 0)
285 for (i = 0; i < 16; i++)
286 s->raw_huffman_lengths[class][index][i] = bits_table[i + 1];
287 for (i = 0; i < 256; i++)
288 s->raw_huffman_values[class][index][i] = val_table[i];
293 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
295 int len, nb_components, i, width, height, bits, ret, size_change;
297 int h_count[MAX_COMPONENTS] = { 0 };
298 int v_count[MAX_COMPONENTS] = { 0 };
301 memset(s->upscale_h, 0, sizeof(s->upscale_h));
302 memset(s->upscale_v, 0, sizeof(s->upscale_v));
304 /* XXX: verify len field validity */
305 len = get_bits(&s->gb, 16);
306 bits = get_bits(&s->gb, 8);
308 if (bits > 16 || bits < 1) {
309 av_log(s->avctx, AV_LOG_ERROR, "bits %d is invalid\n", bits);
310 return AVERROR_INVALIDDATA;
313 if (s->avctx->bits_per_raw_sample != bits) {
314 av_log(s->avctx, s->avctx->bits_per_raw_sample > 0 ? AV_LOG_INFO : AV_LOG_DEBUG, "Changing bps from %d to %d\n", s->avctx->bits_per_raw_sample, bits);
315 s->avctx->bits_per_raw_sample = bits;
320 if (bits == 9 && !s->pegasus_rct)
321 s->rct = 1; // FIXME ugly
323 if(s->lossless && s->avctx->lowres){
324 av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
328 height = get_bits(&s->gb, 16);
329 width = get_bits(&s->gb, 16);
331 // HACK for odd_height.mov
332 if (s->interlaced && s->width == width && s->height == height + 1)
335 av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
336 if (av_image_check_size(width, height, 0, s->avctx) < 0)
337 return AVERROR_INVALIDDATA;
339 nb_components = get_bits(&s->gb, 8);
340 if (nb_components <= 0 ||
341 nb_components > MAX_COMPONENTS)
343 if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
344 if (nb_components != s->nb_components) {
345 av_log(s->avctx, AV_LOG_ERROR,
346 "nb_components changing in interlaced picture\n");
347 return AVERROR_INVALIDDATA;
350 if (s->ls && !(bits <= 8 || nb_components == 1)) {
351 avpriv_report_missing_feature(s->avctx,
352 "JPEG-LS that is not <= 8 "
353 "bits/component or 16-bit gray");
354 return AVERROR_PATCHWELCOME;
356 s->nb_components = nb_components;
359 for (i = 0; i < nb_components; i++) {
361 s->component_id[i] = get_bits(&s->gb, 8) - 1;
362 h_count[i] = get_bits(&s->gb, 4);
363 v_count[i] = get_bits(&s->gb, 4);
364 /* compute hmax and vmax (only used in interleaved case) */
365 if (h_count[i] > s->h_max)
366 s->h_max = h_count[i];
367 if (v_count[i] > s->v_max)
368 s->v_max = v_count[i];
369 s->quant_index[i] = get_bits(&s->gb, 8);
370 if (s->quant_index[i] >= 4) {
371 av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
372 return AVERROR_INVALIDDATA;
374 if (!h_count[i] || !v_count[i]) {
375 av_log(s->avctx, AV_LOG_ERROR,
376 "Invalid sampling factor in component %d %d:%d\n",
377 i, h_count[i], v_count[i]);
378 return AVERROR_INVALIDDATA;
381 av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
382 i, h_count[i], v_count[i],
383 s->component_id[i], s->quant_index[i]);
385 if ( nb_components == 4
386 && s->component_id[0] == 'C' - 1
387 && s->component_id[1] == 'M' - 1
388 && s->component_id[2] == 'Y' - 1
389 && s->component_id[3] == 'K' - 1)
390 s->adobe_transform = 0;
392 if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
393 avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
394 return AVERROR_PATCHWELCOME;
398 /* if different size, realloc/alloc picture */
399 if (width != s->width || height != s->height || bits != s->bits ||
400 memcmp(s->h_count, h_count, sizeof(h_count)) ||
401 memcmp(s->v_count, v_count, sizeof(v_count))) {
407 memcpy(s->h_count, h_count, sizeof(h_count));
408 memcpy(s->v_count, v_count, sizeof(v_count));
412 /* test interlaced mode */
413 if (s->first_picture &&
414 (s->multiscope != 2 || s->avctx->time_base.den >= 25 * s->avctx->time_base.num) &&
415 s->org_height != 0 &&
416 s->height < ((s->org_height * 3) / 4)) {
418 s->bottom_field = s->interlace_polarity;
419 s->picture_ptr->interlaced_frame = 1;
420 s->picture_ptr->top_field_first = !s->interlace_polarity;
424 ret = ff_set_dimensions(s->avctx, width, height);
428 s->first_picture = 0;
433 if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
434 if (s->progressive) {
435 avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
436 return AVERROR_INVALIDDATA;
439 if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
441 else if (!s->lossless)
443 /* XXX: not complete test ! */
444 pix_fmt_id = ((unsigned)s->h_count[0] << 28) | (s->v_count[0] << 24) |
445 (s->h_count[1] << 20) | (s->v_count[1] << 16) |
446 (s->h_count[2] << 12) | (s->v_count[2] << 8) |
447 (s->h_count[3] << 4) | s->v_count[3];
448 av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
449 /* NOTE we do not allocate pictures large enough for the possible
450 * padding of h/v_count being 4 */
451 if (!(pix_fmt_id & 0xD0D0D0D0))
452 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
453 if (!(pix_fmt_id & 0x0D0D0D0D))
454 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
456 for (i = 0; i < 8; i++) {
457 int j = 6 + (i&1) - (i&6);
458 int is = (pix_fmt_id >> (4*i)) & 0xF;
459 int js = (pix_fmt_id >> (4*j)) & 0xF;
461 if (is == 1 && js != 2 && (i < 2 || i > 5))
462 js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
463 if (is == 1 && js != 2 && (i < 2 || i > 5))
464 js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
466 if (is == 1 && js == 2) {
467 if (i & 1) s->upscale_h[j/2] = 1;
468 else s->upscale_v[j/2] = 1;
472 switch (pix_fmt_id) {
475 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
477 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
478 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
480 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
481 else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
482 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
485 av_assert0(s->nb_components == 3);
489 s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
491 if (s->adobe_transform == 0 && s->bits <= 8) {
492 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
494 s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
495 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
498 av_assert0(s->nb_components == 4);
502 if (s->adobe_transform == 0 && s->bits <= 8) {
503 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
504 s->upscale_v[1] = s->upscale_v[2] = 1;
505 s->upscale_h[1] = s->upscale_h[2] = 1;
506 } else if (s->adobe_transform == 2 && s->bits <= 8) {
507 s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
508 s->upscale_v[1] = s->upscale_v[2] = 1;
509 s->upscale_h[1] = s->upscale_h[2] = 1;
510 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
512 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
513 else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
514 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
516 av_assert0(s->nb_components == 4);
522 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
525 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
530 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
533 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
545 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
547 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
554 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
555 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
558 s->upscale_v[0] = s->upscale_v[1] = 1;
560 if (pix_fmt_id == 0x14111100)
561 s->upscale_v[1] = s->upscale_v[2] = 1;
562 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
565 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
569 if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
570 if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
573 s->upscale_h[0] = s->upscale_h[1] = 1;
575 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
576 else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
577 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
583 s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
584 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
585 s->upscale_h[1] = s->upscale_h[2] = 2;
589 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
592 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
597 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
598 else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
599 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
600 if (pix_fmt_id == 0x42111100) {
603 s->upscale_h[1] = s->upscale_h[2] = 1;
604 } else if (pix_fmt_id == 0x24111100) {
607 s->upscale_v[1] = s->upscale_v[2] = 1;
611 if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
614 s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
618 avpriv_report_missing_feature(s->avctx, "Pixel format 0x%x bits:%d", pix_fmt_id, s->bits);
619 memset(s->upscale_h, 0, sizeof(s->upscale_h));
620 memset(s->upscale_v, 0, sizeof(s->upscale_v));
621 return AVERROR_PATCHWELCOME;
623 if ((AV_RB32(s->upscale_h) || AV_RB32(s->upscale_v)) && s->avctx->lowres) {
624 avpriv_report_missing_feature(s->avctx, "Lowres for weird subsampling");
625 return AVERROR_PATCHWELCOME;
628 memset(s->upscale_h, 0, sizeof(s->upscale_h));
629 memset(s->upscale_v, 0, sizeof(s->upscale_v));
630 if (s->nb_components == 3) {
631 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
632 } else if (s->nb_components != 1) {
633 av_log(s->avctx, AV_LOG_ERROR, "Unsupported number of components %d\n", s->nb_components);
634 return AVERROR_PATCHWELCOME;
635 } else if (s->palette_index && s->bits <= 8)
636 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
637 else if (s->bits <= 8)
638 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
640 s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
643 s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
645 av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
649 if (s->avctx->pix_fmt == s->hwaccel_sw_pix_fmt && !size_change) {
650 s->avctx->pix_fmt = s->hwaccel_pix_fmt;
652 enum AVPixelFormat pix_fmts[] = {
656 s->hwaccel_pix_fmt = ff_get_format(s->avctx, pix_fmts);
657 if (s->hwaccel_pix_fmt < 0)
658 return AVERROR(EINVAL);
660 s->hwaccel_sw_pix_fmt = s->avctx->pix_fmt;
661 s->avctx->pix_fmt = s->hwaccel_pix_fmt;
664 if (s->avctx->skip_frame == AVDISCARD_ALL) {
665 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
666 s->picture_ptr->key_frame = 1;
671 av_frame_unref(s->picture_ptr);
672 if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
674 s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
675 s->picture_ptr->key_frame = 1;
678 for (i = 0; i < 4; i++)
679 s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
681 ff_dlog(s->avctx, "%d %d %d %d %d %d\n",
682 s->width, s->height, s->linesize[0], s->linesize[1],
683 s->interlaced, s->avctx->height);
685 if (len != (8 + (3 * nb_components)))
686 av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
689 if ((s->rgb && !s->lossless && !s->ls) ||
690 (!s->rgb && s->ls && s->nb_components > 1)) {
691 av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
692 return AVERROR_PATCHWELCOME;
695 /* totally blank picture as progressive JPEG will only add details to it */
696 if (s->progressive) {
697 int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
698 int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
699 for (i = 0; i < s->nb_components; i++) {
700 int size = bw * bh * s->h_count[i] * s->v_count[i];
701 av_freep(&s->blocks[i]);
702 av_freep(&s->last_nnz[i]);
703 s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
704 s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
705 if (!s->blocks[i] || !s->last_nnz[i])
706 return AVERROR(ENOMEM);
707 s->block_stride[i] = bw * s->h_count[i];
709 memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
712 if (s->avctx->hwaccel) {
713 s->hwaccel_picture_private =
714 av_mallocz(s->avctx->hwaccel->frame_priv_data_size);
715 if (!s->hwaccel_picture_private)
716 return AVERROR(ENOMEM);
718 ret = s->avctx->hwaccel->start_frame(s->avctx, s->raw_image_buffer,
719 s->raw_image_buffer_size);
727 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
730 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
731 if (code < 0 || code > 16) {
732 av_log(s->avctx, AV_LOG_WARNING,
733 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
734 0, dc_index, &s->vlcs[0][dc_index]);
739 return get_xbits(&s->gb, code);
744 /* decode block and dequantize */
745 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
746 int dc_index, int ac_index, uint16_t *quant_matrix)
748 int code, i, j, level, val;
751 val = mjpeg_decode_dc(s, dc_index);
752 if (val == 0xfffff) {
753 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
754 return AVERROR_INVALIDDATA;
756 val = val * (unsigned)quant_matrix[0] + s->last_dc[component];
757 val = av_clip_int16(val);
758 s->last_dc[component] = val;
762 {OPEN_READER(re, &s->gb);
764 UPDATE_CACHE(re, &s->gb);
765 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
767 i += ((unsigned)code) >> 4;
770 if (code > MIN_CACHE_BITS - 16)
771 UPDATE_CACHE(re, &s->gb);
774 int cache = GET_CACHE(re, &s->gb);
775 int sign = (~cache) >> 31;
776 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
779 LAST_SKIP_BITS(re, &s->gb, code);
782 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
783 return AVERROR_INVALIDDATA;
785 j = s->scantable.permutated[i];
786 block[j] = level * quant_matrix[i];
789 CLOSE_READER(re, &s->gb);}
794 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
795 int component, int dc_index,
796 uint16_t *quant_matrix, int Al)
799 s->bdsp.clear_block(block);
800 val = mjpeg_decode_dc(s, dc_index);
801 if (val == 0xfffff) {
802 av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
803 return AVERROR_INVALIDDATA;
805 val = (val * (quant_matrix[0] << Al)) + s->last_dc[component];
806 s->last_dc[component] = val;
811 /* decode block and dequantize - progressive JPEG version */
812 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
813 uint8_t *last_nnz, int ac_index,
814 uint16_t *quant_matrix,
815 int ss, int se, int Al, int *EOBRUN)
817 int code, i, j, val, run;
826 OPEN_READER(re, &s->gb);
827 for (i = ss; ; i++) {
828 UPDATE_CACHE(re, &s->gb);
829 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
831 run = ((unsigned) code) >> 4;
835 if (code > MIN_CACHE_BITS - 16)
836 UPDATE_CACHE(re, &s->gb);
839 int cache = GET_CACHE(re, &s->gb);
840 int sign = (~cache) >> 31;
841 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
844 LAST_SKIP_BITS(re, &s->gb, code);
848 j = s->scantable.permutated[se];
849 block[j] = level * (quant_matrix[se] << Al);
852 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
853 return AVERROR_INVALIDDATA;
855 j = s->scantable.permutated[i];
856 block[j] = level * (quant_matrix[i] << Al);
858 if (run == 0xF) {// ZRL - skip 15 coefficients
861 av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
862 return AVERROR_INVALIDDATA;
867 UPDATE_CACHE(re, &s->gb);
868 val += NEG_USR32(GET_CACHE(re, &s->gb), run);
869 LAST_SKIP_BITS(re, &s->gb, run);
876 CLOSE_READER(re, &s->gb);
885 #define REFINE_BIT(j) { \
886 UPDATE_CACHE(re, &s->gb); \
887 sign = block[j] >> 15; \
888 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
889 ((quant_matrix[i] ^ sign) - sign) << Al; \
890 LAST_SKIP_BITS(re, &s->gb, 1); \
898 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
903 j = s->scantable.permutated[i]; \
906 else if (run-- == 0) \
910 /* decode block and dequantize - progressive JPEG refinement pass */
911 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
913 int ac_index, uint16_t *quant_matrix,
914 int ss, int se, int Al, int *EOBRUN)
916 int code, i = ss, j, sign, val, run;
917 int last = FFMIN(se, *last_nnz);
919 OPEN_READER(re, &s->gb);
924 UPDATE_CACHE(re, &s->gb);
925 GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
928 run = ((unsigned) code) >> 4;
929 UPDATE_CACHE(re, &s->gb);
930 val = SHOW_UBITS(re, &s->gb, 1);
931 LAST_SKIP_BITS(re, &s->gb, 1);
933 j = s->scantable.permutated[i];
935 block[j] = ((quant_matrix[i] << Al) ^ val) - val;
939 CLOSE_READER(re, &s->gb);
943 run = ((unsigned) code) >> 4;
950 UPDATE_CACHE(re, &s->gb);
951 run += SHOW_UBITS(re, &s->gb, val);
952 LAST_SKIP_BITS(re, &s->gb, val);
964 for (; i <= last; i++) {
965 j = s->scantable.permutated[i];
969 CLOSE_READER(re, &s->gb);
976 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
981 if (s->restart_interval) {
983 if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
984 align_get_bits(&s->gb);
985 for (i = 0; i < nb_components; i++) /* reset dc */
986 s->last_dc[i] = (4 << s->bits);
989 i = 8 + ((-get_bits_count(&s->gb)) & 7);
991 if (s->restart_count == 0) {
992 if( show_bits(&s->gb, i) == (1 << i) - 1
993 || show_bits(&s->gb, i) == 0xFF) {
994 int pos = get_bits_count(&s->gb);
995 align_get_bits(&s->gb);
996 while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
997 skip_bits(&s->gb, 8);
998 if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
999 for (i = 0; i < nb_components; i++) /* reset dc */
1000 s->last_dc[i] = (4 << s->bits);
1003 skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
1010 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
1013 uint16_t (*buffer)[4];
1014 int left[4], top[4], topleft[4];
1015 const int linesize = s->linesize[0];
1016 const int mask = ((1 << s->bits) - 1) << point_transform;
1017 int resync_mb_y = 0;
1018 int resync_mb_x = 0;
1020 if (s->nb_components != 3 && s->nb_components != 4)
1021 return AVERROR_INVALIDDATA;
1022 if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
1023 return AVERROR_INVALIDDATA;
1026 s->restart_count = s->restart_interval;
1028 av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
1029 (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
1030 if (!s->ljpeg_buffer)
1031 return AVERROR(ENOMEM);
1033 buffer = s->ljpeg_buffer;
1035 for (i = 0; i < 4; i++)
1036 buffer[0][i] = 1 << (s->bits - 1);
1038 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1039 uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
1041 if (s->interlaced && s->bottom_field)
1042 ptr += linesize >> 1;
1044 for (i = 0; i < 4; i++)
1045 top[i] = left[i] = topleft[i] = buffer[0][i];
1047 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1048 int modified_predictor = predictor;
1050 if (s->restart_interval && !s->restart_count){
1051 s->restart_count = s->restart_interval;
1055 top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
1057 if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
1058 modified_predictor = 1;
1060 for (i=0;i<nb_components;i++) {
1063 topleft[i] = top[i];
1064 top[i] = buffer[mb_x][i];
1066 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
1068 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1072 left[i] = buffer[mb_x][i] =
1073 mask & (pred + (dc * (1 << point_transform)));
1076 if (s->restart_interval && !--s->restart_count) {
1077 align_get_bits(&s->gb);
1078 skip_bits(&s->gb, 16); /* skip RSTn */
1081 if (s->rct && s->nb_components == 4) {
1082 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1083 ptr[4*mb_x + 2] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1084 ptr[4*mb_x + 1] = buffer[mb_x][1] + ptr[4*mb_x + 2];
1085 ptr[4*mb_x + 3] = buffer[mb_x][2] + ptr[4*mb_x + 2];
1086 ptr[4*mb_x + 0] = buffer[mb_x][3];
1088 } else if (s->nb_components == 4) {
1089 for(i=0; i<nb_components; i++) {
1090 int c= s->comp_index[i];
1092 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1093 ptr[4*mb_x+3-c] = buffer[mb_x][i];
1095 } else if(s->bits == 9) {
1096 return AVERROR_PATCHWELCOME;
1098 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1099 ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
1103 } else if (s->rct) {
1104 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1105 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1106 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1107 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1109 } else if (s->pegasus_rct) {
1110 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1111 ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
1112 ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1113 ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1116 for(i=0; i<nb_components; i++) {
1117 int c= s->comp_index[i];
1119 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1120 ptr[3*mb_x+2-c] = buffer[mb_x][i];
1122 } else if(s->bits == 9) {
1123 return AVERROR_PATCHWELCOME;
1125 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1126 ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
1135 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1136 int point_transform, int nb_components)
1138 int i, mb_x, mb_y, mask;
1139 int bits= (s->bits+7)&~7;
1140 int resync_mb_y = 0;
1141 int resync_mb_x = 0;
1143 point_transform += bits - s->bits;
1144 mask = ((1 << s->bits) - 1) << point_transform;
1146 av_assert0(nb_components>=1 && nb_components<=4);
1148 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1149 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1150 if (get_bits_left(&s->gb) < 1) {
1151 av_log(s->avctx, AV_LOG_ERROR, "bitstream end in yuv_scan\n");
1152 return AVERROR_INVALIDDATA;
1154 if (s->restart_interval && !s->restart_count){
1155 s->restart_count = s->restart_interval;
1160 if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1161 int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1162 int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1163 for (i = 0; i < nb_components; i++) {
1166 int n, h, v, x, y, c, j, linesize;
1167 n = s->nb_blocks[i];
1168 c = s->comp_index[i];
1173 linesize= s->linesize[c];
1175 if(bits>8) linesize /= 2;
1177 for(j=0; j<n; j++) {
1180 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1183 if ( h * mb_x + x >= s->width
1184 || v * mb_y + y >= s->height) {
1186 } else if (bits<=8) {
1187 ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1189 if(x==0 && leftcol){
1190 pred= 1 << (bits - 1);
1195 if(x==0 && leftcol){
1196 pred= ptr[-linesize];
1198 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1202 if (s->interlaced && s->bottom_field)
1203 ptr += linesize >> 1;
1205 *ptr= pred + ((unsigned)dc << point_transform);
1207 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1209 if(x==0 && leftcol){
1210 pred= 1 << (bits - 1);
1215 if(x==0 && leftcol){
1216 pred= ptr16[-linesize];
1218 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1222 if (s->interlaced && s->bottom_field)
1223 ptr16 += linesize >> 1;
1225 *ptr16= pred + ((unsigned)dc << point_transform);
1234 for (i = 0; i < nb_components; i++) {
1237 int n, h, v, x, y, c, j, linesize, dc;
1238 n = s->nb_blocks[i];
1239 c = s->comp_index[i];
1244 linesize = s->linesize[c];
1246 if(bits>8) linesize /= 2;
1248 for (j = 0; j < n; j++) {
1251 dc = mjpeg_decode_dc(s, s->dc_index[i]);
1254 if ( h * mb_x + x >= s->width
1255 || v * mb_y + y >= s->height) {
1257 } else if (bits<=8) {
1258 ptr = s->picture_ptr->data[c] +
1259 (linesize * (v * mb_y + y)) +
1260 (h * mb_x + x); //FIXME optimize this crap
1261 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1264 *ptr = pred + ((unsigned)dc << point_transform);
1266 ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1267 PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1270 *ptr16= pred + ((unsigned)dc << point_transform);
1280 if (s->restart_interval && !--s->restart_count) {
1281 align_get_bits(&s->gb);
1282 skip_bits(&s->gb, 16); /* skip RSTn */
1289 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1290 uint8_t *dst, const uint8_t *src,
1291 int linesize, int lowres)
1294 case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1296 case 1: copy_block4(dst, src, linesize, linesize, 4);
1298 case 2: copy_block2(dst, src, linesize, linesize, 2);
1300 case 3: *dst = *src;
1305 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1307 int block_x, block_y;
1308 int size = 8 >> s->avctx->lowres;
1310 for (block_y=0; block_y<size; block_y++)
1311 for (block_x=0; block_x<size; block_x++)
1312 *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1314 for (block_y=0; block_y<size; block_y++)
1315 for (block_x=0; block_x<size; block_x++)
1316 *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1320 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1321 int Al, const uint8_t *mb_bitmask,
1322 int mb_bitmask_size,
1323 const AVFrame *reference)
1325 int i, mb_x, mb_y, chroma_h_shift, chroma_v_shift, chroma_width, chroma_height;
1326 uint8_t *data[MAX_COMPONENTS];
1327 const uint8_t *reference_data[MAX_COMPONENTS];
1328 int linesize[MAX_COMPONENTS];
1329 GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1330 int bytes_per_pixel = 1 + (s->bits > 8);
1333 if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1334 av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1335 return AVERROR_INVALIDDATA;
1337 init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1340 s->restart_count = 0;
1342 av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &chroma_h_shift,
1344 chroma_width = AV_CEIL_RSHIFT(s->width, chroma_h_shift);
1345 chroma_height = AV_CEIL_RSHIFT(s->height, chroma_v_shift);
1347 for (i = 0; i < nb_components; i++) {
1348 int c = s->comp_index[i];
1349 data[c] = s->picture_ptr->data[c];
1350 reference_data[c] = reference ? reference->data[c] : NULL;
1351 linesize[c] = s->linesize[c];
1352 s->coefs_finished[c] |= 1;
1355 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1356 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1357 const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1359 if (s->restart_interval && !s->restart_count)
1360 s->restart_count = s->restart_interval;
1362 if (get_bits_left(&s->gb) < 0) {
1363 av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1364 -get_bits_left(&s->gb));
1365 return AVERROR_INVALIDDATA;
1367 for (i = 0; i < nb_components; i++) {
1369 int n, h, v, x, y, c, j;
1371 n = s->nb_blocks[i];
1372 c = s->comp_index[i];
1377 for (j = 0; j < n; j++) {
1378 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1379 (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1381 if (s->interlaced && s->bottom_field)
1382 block_offset += linesize[c] >> 1;
1383 if ( 8*(h * mb_x + x) < ((c == 1) || (c == 2) ? chroma_width : s->width)
1384 && 8*(v * mb_y + y) < ((c == 1) || (c == 2) ? chroma_height : s->height)) {
1385 ptr = data[c] + block_offset;
1388 if (!s->progressive) {
1391 mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1392 linesize[c], s->avctx->lowres);
1395 s->bdsp.clear_block(s->block);
1396 if (decode_block(s, s->block, i,
1397 s->dc_index[i], s->ac_index[i],
1398 s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1399 av_log(s->avctx, AV_LOG_ERROR,
1400 "error y=%d x=%d\n", mb_y, mb_x);
1401 return AVERROR_INVALIDDATA;
1404 s->idsp.idct_put(ptr, linesize[c], s->block);
1406 shift_output(s, ptr, linesize[c]);
1410 int block_idx = s->block_stride[c] * (v * mb_y + y) +
1412 int16_t *block = s->blocks[c][block_idx];
1414 block[0] += get_bits1(&s->gb) *
1415 s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1416 else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1417 s->quant_matrixes[s->quant_sindex[i]],
1419 av_log(s->avctx, AV_LOG_ERROR,
1420 "error y=%d x=%d\n", mb_y, mb_x);
1421 return AVERROR_INVALIDDATA;
1424 ff_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1425 ff_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1426 mb_x, mb_y, x, y, c, s->bottom_field,
1427 (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1435 handle_rstn(s, nb_components);
1441 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1442 int se, int Ah, int Al)
1446 int c = s->comp_index[0];
1447 uint16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1449 av_assert0(ss>=0 && Ah>=0 && Al>=0);
1450 if (se < ss || se > 63) {
1451 av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1452 return AVERROR_INVALIDDATA;
1455 // s->coefs_finished is a bitmask for coefficients coded
1456 // ss and se are parameters telling start and end coefficients
1457 s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1459 s->restart_count = 0;
1461 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1462 int block_idx = mb_y * s->block_stride[c];
1463 int16_t (*block)[64] = &s->blocks[c][block_idx];
1464 uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1465 if (get_bits_left(&s->gb) <= 0) {
1466 av_log(s->avctx, AV_LOG_ERROR, "bitstream truncated in mjpeg_decode_scan_progressive_ac\n");
1467 return AVERROR_INVALIDDATA;
1469 for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1471 if (s->restart_interval && !s->restart_count)
1472 s->restart_count = s->restart_interval;
1475 ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1476 quant_matrix, ss, se, Al, &EOBRUN);
1478 ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1479 quant_matrix, ss, se, Al, &EOBRUN);
1481 av_log(s->avctx, AV_LOG_ERROR,
1482 "error y=%d x=%d\n", mb_y, mb_x);
1483 return AVERROR_INVALIDDATA;
1486 if (handle_rstn(s, 0))
1493 static void mjpeg_idct_scan_progressive_ac(MJpegDecodeContext *s)
1497 const int bytes_per_pixel = 1 + (s->bits > 8);
1498 const int block_size = s->lossless ? 1 : 8;
1500 for (c = 0; c < s->nb_components; c++) {
1501 uint8_t *data = s->picture_ptr->data[c];
1502 int linesize = s->linesize[c];
1503 int h = s->h_max / s->h_count[c];
1504 int v = s->v_max / s->v_count[c];
1505 int mb_width = (s->width + h * block_size - 1) / (h * block_size);
1506 int mb_height = (s->height + v * block_size - 1) / (v * block_size);
1508 if (~s->coefs_finished[c])
1509 av_log(s->avctx, AV_LOG_WARNING, "component %d is incomplete\n", c);
1511 if (s->interlaced && s->bottom_field)
1512 data += linesize >> 1;
1514 for (mb_y = 0; mb_y < mb_height; mb_y++) {
1515 uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1516 int block_idx = mb_y * s->block_stride[c];
1517 int16_t (*block)[64] = &s->blocks[c][block_idx];
1518 for (mb_x = 0; mb_x < mb_width; mb_x++, block++) {
1519 s->idsp.idct_put(ptr, linesize, *block);
1521 shift_output(s, ptr, linesize);
1522 ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1528 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1529 int mb_bitmask_size, const AVFrame *reference)
1531 int len, nb_components, i, h, v, predictor, point_transform;
1533 const int block_size = s->lossless ? 1 : 8;
1534 int ilv, prev_shift;
1536 if (!s->got_picture) {
1537 av_log(s->avctx, AV_LOG_WARNING,
1538 "Can not process SOS before SOF, skipping\n");
1543 if (reference->width != s->picture_ptr->width ||
1544 reference->height != s->picture_ptr->height ||
1545 reference->format != s->picture_ptr->format) {
1546 av_log(s->avctx, AV_LOG_ERROR, "Reference mismatching\n");
1547 return AVERROR_INVALIDDATA;
1551 /* XXX: verify len field validity */
1552 len = get_bits(&s->gb, 16);
1553 nb_components = get_bits(&s->gb, 8);
1554 if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1555 avpriv_report_missing_feature(s->avctx,
1556 "decode_sos: nb_components (%d)",
1558 return AVERROR_PATCHWELCOME;
1560 if (len != 6 + 2 * nb_components) {
1561 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1562 return AVERROR_INVALIDDATA;
1564 for (i = 0; i < nb_components; i++) {
1565 id = get_bits(&s->gb, 8) - 1;
1566 av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1567 /* find component index */
1568 for (index = 0; index < s->nb_components; index++)
1569 if (id == s->component_id[index])
1571 if (index == s->nb_components) {
1572 av_log(s->avctx, AV_LOG_ERROR,
1573 "decode_sos: index(%d) out of components\n", index);
1574 return AVERROR_INVALIDDATA;
1576 /* Metasoft MJPEG codec has Cb and Cr swapped */
1577 if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1578 && nb_components == 3 && s->nb_components == 3 && i)
1581 s->quant_sindex[i] = s->quant_index[index];
1582 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1583 s->h_scount[i] = s->h_count[index];
1584 s->v_scount[i] = s->v_count[index];
1586 if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1588 if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1589 index = (index+2)%3;
1591 s->comp_index[i] = index;
1593 s->dc_index[i] = get_bits(&s->gb, 4);
1594 s->ac_index[i] = get_bits(&s->gb, 4);
1596 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1597 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1599 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))
1603 predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1604 ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1605 if(s->avctx->codec_tag != AV_RL32("CJPG")){
1606 prev_shift = get_bits(&s->gb, 4); /* Ah */
1607 point_transform = get_bits(&s->gb, 4); /* Al */
1609 prev_shift = point_transform = 0;
1611 if (nb_components > 1) {
1612 /* interleaved stream */
1613 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1614 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1615 } else if (!s->ls) { /* skip this for JPEG-LS */
1616 h = s->h_max / s->h_scount[0];
1617 v = s->v_max / s->v_scount[0];
1618 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1619 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1620 s->nb_blocks[0] = 1;
1625 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1626 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1627 s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1628 predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1629 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1632 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1633 for (i = s->mjpb_skiptosod; i > 0; i--)
1634 skip_bits(&s->gb, 8);
1637 for (i = 0; i < nb_components; i++)
1638 s->last_dc[i] = (4 << s->bits);
1640 if (s->avctx->hwaccel) {
1641 int bytes_to_start = get_bits_count(&s->gb) / 8;
1642 av_assert0(bytes_to_start >= 0 &&
1643 s->raw_scan_buffer_size >= bytes_to_start);
1645 ret = s->avctx->hwaccel->decode_slice(s->avctx,
1646 s->raw_scan_buffer + bytes_to_start,
1647 s->raw_scan_buffer_size - bytes_to_start);
1651 } else if (s->lossless) {
1652 av_assert0(s->picture_ptr == s->picture);
1653 if (CONFIG_JPEGLS_DECODER && s->ls) {
1655 // reset_ls_coding_parameters(s, 0);
1657 if ((ret = ff_jpegls_decode_picture(s, predictor,
1658 point_transform, ilv)) < 0)
1662 if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1665 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1667 nb_components)) < 0)
1672 if (s->progressive && predictor) {
1673 av_assert0(s->picture_ptr == s->picture);
1674 if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1676 point_transform)) < 0)
1679 if ((ret = mjpeg_decode_scan(s, nb_components,
1680 prev_shift, point_transform,
1681 mb_bitmask, mb_bitmask_size, reference)) < 0)
1686 if (s->interlaced &&
1687 get_bits_left(&s->gb) > 32 &&
1688 show_bits(&s->gb, 8) == 0xFF) {
1689 GetBitContext bak = s->gb;
1690 align_get_bits(&bak);
1691 if (show_bits(&bak, 16) == 0xFFD1) {
1692 av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1694 skip_bits(&s->gb, 16);
1695 s->bottom_field ^= 1;
1704 av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1705 return AVERROR_INVALIDDATA;
1708 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1710 if (get_bits(&s->gb, 16) != 4)
1711 return AVERROR_INVALIDDATA;
1712 s->restart_interval = get_bits(&s->gb, 16);
1713 s->restart_count = 0;
1714 av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1715 s->restart_interval);
1720 static int mjpeg_decode_app(MJpegDecodeContext *s)
1724 len = get_bits(&s->gb, 16);
1726 return AVERROR_INVALIDDATA;
1727 if (8 * len > get_bits_left(&s->gb))
1728 return AVERROR_INVALIDDATA;
1730 id = get_bits_long(&s->gb, 32);
1733 if (s->avctx->debug & FF_DEBUG_STARTCODE)
1734 av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n",
1735 av_fourcc2str(av_bswap32(id)), id, len);
1737 /* Buggy AVID, it puts EOI only at every 10th frame. */
1738 /* Also, this fourcc is used by non-avid files too, it holds some
1739 information, but it's always present in AVID-created files. */
1740 if (id == AV_RB32("AVI1")) {
1746 4bytes field_size_less_padding
1749 i = get_bits(&s->gb, 8); len--;
1750 av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1754 if (id == AV_RB32("JFIF")) {
1755 int t_w, t_h, v1, v2;
1758 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1759 v1 = get_bits(&s->gb, 8);
1760 v2 = get_bits(&s->gb, 8);
1761 skip_bits(&s->gb, 8);
1763 s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1764 s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1765 if ( s->avctx->sample_aspect_ratio.num <= 0
1766 || s->avctx->sample_aspect_ratio.den <= 0) {
1767 s->avctx->sample_aspect_ratio.num = 0;
1768 s->avctx->sample_aspect_ratio.den = 1;
1771 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1772 av_log(s->avctx, AV_LOG_INFO,
1773 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1775 s->avctx->sample_aspect_ratio.num,
1776 s->avctx->sample_aspect_ratio.den);
1780 t_w = get_bits(&s->gb, 8);
1781 t_h = get_bits(&s->gb, 8);
1783 /* skip thumbnail */
1784 if (len -10 - (t_w * t_h * 3) > 0)
1785 len -= t_w * t_h * 3;
1792 if ( id == AV_RB32("Adob")
1794 && show_bits(&s->gb, 8) == 'e'
1795 && show_bits_long(&s->gb, 32) != AV_RB32("e_CM")) {
1796 skip_bits(&s->gb, 8); /* 'e' */
1797 skip_bits(&s->gb, 16); /* version */
1798 skip_bits(&s->gb, 16); /* flags0 */
1799 skip_bits(&s->gb, 16); /* flags1 */
1800 s->adobe_transform = get_bits(&s->gb, 8);
1801 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1802 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1807 if (id == AV_RB32("LJIF")) {
1809 int pegasus_rct = s->pegasus_rct;
1810 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1811 av_log(s->avctx, AV_LOG_INFO,
1812 "Pegasus lossless jpeg header found\n");
1813 skip_bits(&s->gb, 16); /* version ? */
1814 skip_bits(&s->gb, 16); /* unknown always 0? */
1815 skip_bits(&s->gb, 16); /* unknown always 0? */
1816 skip_bits(&s->gb, 16); /* unknown always 0? */
1817 switch (i=get_bits(&s->gb, 8)) {
1827 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1832 if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
1833 av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
1838 s->pegasus_rct = pegasus_rct;
1842 if (id == AV_RL32("colr") && len > 0) {
1843 s->colr = get_bits(&s->gb, 8);
1844 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1845 av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1849 if (id == AV_RL32("xfrm") && len > 0) {
1850 s->xfrm = get_bits(&s->gb, 8);
1851 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1852 av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1857 /* JPS extension by VRex */
1858 if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1859 int flags, layout, type;
1860 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1861 av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1863 skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1864 skip_bits(&s->gb, 16); len -= 2; /* block length */
1865 skip_bits(&s->gb, 8); /* reserved */
1866 flags = get_bits(&s->gb, 8);
1867 layout = get_bits(&s->gb, 8);
1868 type = get_bits(&s->gb, 8);
1871 s->stereo3d = av_stereo3d_alloc();
1876 s->stereo3d->type = AV_STEREO3D_2D;
1877 } else if (type == 1) {
1880 s->stereo3d->type = AV_STEREO3D_LINES;
1883 s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1886 s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1889 if (!(flags & 0x04)) {
1890 s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1897 if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1898 GetByteContext gbytes;
1899 int ret, le, ifd_offset, bytes_read;
1900 const uint8_t *aligned;
1902 skip_bits(&s->gb, 16); // skip padding
1905 // init byte wise reading
1906 aligned = align_get_bits(&s->gb);
1907 bytestream2_init(&gbytes, aligned, len);
1910 ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1912 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1914 bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1916 // read 0th IFD and store the metadata
1917 // (return values > 0 indicate the presence of subimage metadata)
1918 ret = ff_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1920 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1924 bytes_read = bytestream2_tell(&gbytes);
1925 skip_bits(&s->gb, bytes_read << 3);
1932 if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1933 id = get_bits_long(&s->gb, 32);
1936 if (id == AV_RB32("mjpg")) {
1939 4bytes pad field size
1947 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1948 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1952 if (s->start_code == APP2 && id == AV_RB32("ICC_") && len >= 10) {
1955 unsigned nummarkers;
1957 id = get_bits_long(&s->gb, 32);
1958 id2 = get_bits_long(&s->gb, 24);
1960 if (id != AV_RB32("PROF") || id2 != AV_RB24("ILE")) {
1961 av_log(s->avctx, AV_LOG_WARNING, "Invalid ICC_PROFILE header in APP2\n");
1965 skip_bits(&s->gb, 8);
1966 seqno = get_bits(&s->gb, 8);
1969 av_log(s->avctx, AV_LOG_WARNING, "Invalid sequence number in APP2\n");
1973 nummarkers = get_bits(&s->gb, 8);
1975 if (nummarkers == 0) {
1976 av_log(s->avctx, AV_LOG_WARNING, "Invalid number of markers coded in APP2\n");
1978 } else if (s->iccnum != 0 && nummarkers != s->iccnum) {
1979 av_log(s->avctx, AV_LOG_WARNING, "Mistmatch in coded number of ICC markers between markers\n");
1981 } else if (seqno > nummarkers) {
1982 av_log(s->avctx, AV_LOG_WARNING, "Mismatching sequence number and coded number of ICC markers\n");
1986 /* Allocate if this is the first APP2 we've seen. */
1987 if (s->iccnum == 0) {
1988 s->iccdata = av_mallocz(nummarkers * sizeof(*(s->iccdata)));
1989 s->iccdatalens = av_mallocz(nummarkers * sizeof(*(s->iccdatalens)));
1990 if (!s->iccdata || !s->iccdatalens) {
1991 av_log(s->avctx, AV_LOG_ERROR, "Could not allocate ICC data arrays\n");
1992 return AVERROR(ENOMEM);
1994 s->iccnum = nummarkers;
1997 if (s->iccdata[seqno - 1]) {
1998 av_log(s->avctx, AV_LOG_WARNING, "Duplicate ICC sequence number\n");
2002 s->iccdatalens[seqno - 1] = len;
2003 s->iccdata[seqno - 1] = av_malloc(len);
2004 if (!s->iccdata[seqno - 1]) {
2005 av_log(s->avctx, AV_LOG_ERROR, "Could not allocate ICC data buffer\n");
2006 return AVERROR(ENOMEM);
2009 memcpy(s->iccdata[seqno - 1], align_get_bits(&s->gb), len);
2010 skip_bits(&s->gb, len << 3);
2014 if (s->iccread > s->iccnum)
2015 av_log(s->avctx, AV_LOG_WARNING, "Read more ICC markers than are supposed to be coded\n");
2019 /* slow but needed for extreme adobe jpegs */
2021 av_log(s->avctx, AV_LOG_ERROR,
2022 "mjpeg: error, decode_app parser read over the end\n");
2024 skip_bits(&s->gb, 8);
2029 static int mjpeg_decode_com(MJpegDecodeContext *s)
2031 int len = get_bits(&s->gb, 16);
2032 if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
2034 char *cbuf = av_malloc(len - 1);
2036 return AVERROR(ENOMEM);
2038 for (i = 0; i < len - 2; i++)
2039 cbuf[i] = get_bits(&s->gb, 8);
2040 if (i > 0 && cbuf[i - 1] == '\n')
2045 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2046 av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
2048 /* buggy avid, it puts EOI only at every 10th frame */
2049 if (!strncmp(cbuf, "AVID", 4)) {
2050 parse_avid(s, cbuf, len);
2051 } else if (!strcmp(cbuf, "CS=ITU601"))
2053 else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
2054 (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
2056 else if (!strcmp(cbuf, "MULTISCOPE II")) {
2057 s->avctx->sample_aspect_ratio = (AVRational) { 1, 2 };
2067 /* return the 8 bit start code value and update the search
2068 state. Return -1 if no start code found */
2069 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
2071 const uint8_t *buf_ptr;
2076 buf_ptr = *pbuf_ptr;
2077 while (buf_end - buf_ptr > 1) {
2080 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
2089 ff_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
2090 *pbuf_ptr = buf_ptr;
2094 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
2095 const uint8_t **buf_ptr, const uint8_t *buf_end,
2096 const uint8_t **unescaped_buf_ptr,
2097 int *unescaped_buf_size)
2100 start_code = find_marker(buf_ptr, buf_end);
2102 av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
2104 return AVERROR(ENOMEM);
2106 /* unescape buffer of SOS, use special treatment for JPEG-LS */
2107 if (start_code == SOS && !s->ls) {
2108 const uint8_t *src = *buf_ptr;
2109 const uint8_t *ptr = src;
2110 uint8_t *dst = s->buffer;
2112 #define copy_data_segment(skip) do { \
2113 ptrdiff_t length = (ptr - src) - (skip); \
2115 memcpy(dst, src, length); \
2121 if (s->avctx->codec_id == AV_CODEC_ID_THP) {
2123 copy_data_segment(0);
2125 while (ptr < buf_end) {
2126 uint8_t x = *(ptr++);
2130 while (ptr < buf_end && x == 0xff) {
2135 /* 0xFF, 0xFF, ... */
2137 copy_data_segment(skip);
2139 /* decrement src as it is equal to ptr after the
2140 * copy_data_segment macro and we might want to
2141 * copy the current value of x later on */
2145 if (x < 0xd0 || x > 0xd7) {
2146 copy_data_segment(1);
2153 copy_data_segment(0);
2155 #undef copy_data_segment
2157 *unescaped_buf_ptr = s->buffer;
2158 *unescaped_buf_size = dst - s->buffer;
2159 memset(s->buffer + *unescaped_buf_size, 0,
2160 AV_INPUT_BUFFER_PADDING_SIZE);
2162 av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
2163 (buf_end - *buf_ptr) - (dst - s->buffer));
2164 } else if (start_code == SOS && s->ls) {
2165 const uint8_t *src = *buf_ptr;
2166 uint8_t *dst = s->buffer;
2172 while (src + t < buf_end) {
2173 uint8_t x = src[t++];
2175 while ((src + t < buf_end) && x == 0xff)
2184 init_put_bits(&pb, dst, t);
2186 /* unescape bitstream */
2188 uint8_t x = src[b++];
2189 put_bits(&pb, 8, x);
2190 if (x == 0xFF && b < t) {
2193 av_log(s->avctx, AV_LOG_WARNING, "Invalid escape sequence\n");
2196 put_bits(&pb, 7, x);
2200 flush_put_bits(&pb);
2202 *unescaped_buf_ptr = dst;
2203 *unescaped_buf_size = (bit_count + 7) >> 3;
2204 memset(s->buffer + *unescaped_buf_size, 0,
2205 AV_INPUT_BUFFER_PADDING_SIZE);
2207 *unescaped_buf_ptr = *buf_ptr;
2208 *unescaped_buf_size = buf_end - *buf_ptr;
2214 static void reset_icc_profile(MJpegDecodeContext *s)
2219 for (i = 0; i < s->iccnum; i++)
2220 av_freep(&s->iccdata[i]);
2221 av_freep(&s->iccdata);
2222 av_freep(&s->iccdatalens);
2228 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
2231 AVFrame *frame = data;
2232 const uint8_t *buf = avpkt->data;
2233 int buf_size = avpkt->size;
2234 MJpegDecodeContext *s = avctx->priv_data;
2235 const uint8_t *buf_end, *buf_ptr;
2236 const uint8_t *unescaped_buf_ptr;
2238 int unescaped_buf_size;
2244 av_dict_free(&s->exif_metadata);
2245 av_freep(&s->stereo3d);
2246 s->adobe_transform = -1;
2249 reset_icc_profile(s);
2252 buf_end = buf + buf_size;
2253 while (buf_ptr < buf_end) {
2254 /* find start next marker */
2255 start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
2257 &unescaped_buf_size);
2259 if (start_code < 0) {
2261 } else if (unescaped_buf_size > INT_MAX / 8) {
2262 av_log(avctx, AV_LOG_ERROR,
2263 "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
2264 start_code, unescaped_buf_size, buf_size);
2265 return AVERROR_INVALIDDATA;
2267 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
2268 start_code, buf_end - buf_ptr);
2270 ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
2273 av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
2277 s->start_code = start_code;
2278 if (s->avctx->debug & FF_DEBUG_STARTCODE)
2279 av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
2281 /* process markers */
2282 if (start_code >= 0xd0 && start_code <= 0xd7) {
2283 av_log(avctx, AV_LOG_DEBUG,
2284 "restart marker: %d\n", start_code & 0x0f);
2286 } else if (start_code >= APP0 && start_code <= APP15) {
2287 if ((ret = mjpeg_decode_app(s)) < 0)
2288 av_log(avctx, AV_LOG_ERROR, "unable to decode APP fields: %s\n",
2291 } else if (start_code == COM) {
2292 ret = mjpeg_decode_com(s);
2295 } else if (start_code == DQT) {
2296 ret = ff_mjpeg_decode_dqt(s);
2303 if (!CONFIG_JPEGLS_DECODER &&
2304 (start_code == SOF48 || start_code == LSE)) {
2305 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
2306 return AVERROR(ENOSYS);
2309 if (avctx->skip_frame == AVDISCARD_ALL) {
2310 switch(start_code) {
2325 switch (start_code) {
2327 s->restart_interval = 0;
2328 s->restart_count = 0;
2329 s->raw_image_buffer = buf_ptr;
2330 s->raw_image_buffer_size = buf_end - buf_ptr;
2331 /* nothing to do on SOI */
2334 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
2335 av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
2341 if (start_code == SOF0)
2342 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_BASELINE_DCT;
2344 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_EXTENDED_SEQUENTIAL_DCT;
2348 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2352 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_PROGRESSIVE_DCT;
2356 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2360 s->avctx->profile = FF_PROFILE_MJPEG_HUFFMAN_LOSSLESS;
2361 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2365 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2369 s->avctx->profile = FF_PROFILE_MJPEG_JPEG_LS;
2370 s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2374 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2378 if (!CONFIG_JPEGLS_DECODER ||
2379 (ret = ff_jpegls_decode_lse(s)) < 0)
2384 if (!avctx->hwaccel && avctx->skip_frame != AVDISCARD_ALL &&
2385 s->progressive && s->cur_scan && s->got_picture)
2386 mjpeg_idct_scan_progressive_ac(s);
2388 if (!s->got_picture) {
2389 av_log(avctx, AV_LOG_WARNING,
2390 "Found EOI before any SOF, ignoring\n");
2393 if (s->interlaced) {
2394 s->bottom_field ^= 1;
2395 /* if not bottom field, do not output image yet */
2396 if (s->bottom_field == !s->interlace_polarity)
2399 if (avctx->skip_frame == AVDISCARD_ALL) {
2401 goto the_end_no_picture;
2403 if (s->avctx->hwaccel) {
2404 ret = s->avctx->hwaccel->end_frame(s->avctx);
2408 av_freep(&s->hwaccel_picture_private);
2410 if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2416 int qp = FFMAX3(s->qscale[0],
2419 int qpw = (s->width + 15) / 16;
2420 AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2422 memset(qp_table_buf->data, qp, qpw);
2423 av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2426 if(avctx->debug & FF_DEBUG_QP)
2427 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2432 s->raw_scan_buffer = buf_ptr;
2433 s->raw_scan_buffer_size = buf_end - buf_ptr;
2436 if (avctx->skip_frame == AVDISCARD_ALL) {
2437 skip_bits(&s->gb, get_bits_left(&s->gb));
2441 if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2442 (avctx->err_recognition & AV_EF_EXPLODE))
2446 if ((ret = mjpeg_decode_dri(s)) < 0)
2459 av_log(avctx, AV_LOG_ERROR,
2460 "mjpeg: unsupported coding type (%x)\n", start_code);
2465 /* eof process start code */
2466 buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2467 av_log(avctx, AV_LOG_DEBUG,
2468 "marker parser used %d bytes (%d bits)\n",
2469 (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2471 if (s->got_picture && s->cur_scan) {
2472 av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2475 av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2476 return AVERROR_INVALIDDATA;
2482 is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step > 1;
2484 if (AV_RB32(s->upscale_h)) {
2486 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2487 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2488 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2489 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2490 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2491 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2492 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2493 avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2494 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2495 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2496 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2497 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2499 ret = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2503 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2504 for (p = 0; p<s->nb_components; p++) {
2505 uint8_t *line = s->picture_ptr->data[p];
2508 if (!s->upscale_h[p])
2511 w = AV_CEIL_RSHIFT(w, hshift);
2512 h = AV_CEIL_RSHIFT(h, vshift);
2514 if (s->upscale_v[p])
2517 for (i = 0; i < h; i++) {
2518 if (s->upscale_h[p] == 1) {
2519 if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2520 else line[w - 1] = line[(w - 1) / 2];
2521 for (index = w - 2; index > 0; index--) {
2523 ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2525 line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2527 } else if (s->upscale_h[p] == 2) {
2529 ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 3];
2531 ((uint16_t*)line)[w - 2] = ((uint16_t*)line)[w - 1];
2533 line[w - 1] = line[(w - 1) / 3];
2535 line[w - 2] = line[w - 1];
2537 for (index = w - 3; index > 0; index--) {
2538 line[index] = (line[index / 3] + line[(index + 1) / 3] + line[(index + 2) / 3] + 1) / 3;
2541 line += s->linesize[p];
2545 if (AV_RB32(s->upscale_v)) {
2547 av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2548 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2549 avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2550 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2551 avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2552 avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2553 avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2554 avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2555 avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2556 avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2557 avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2558 avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2559 avctx->pix_fmt == AV_PIX_FMT_GBRAP
2561 ret = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2565 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2566 for (p = 0; p < s->nb_components; p++) {
2570 if (!s->upscale_v[p])
2573 w = AV_CEIL_RSHIFT(w, hshift);
2574 h = AV_CEIL_RSHIFT(h, vshift);
2576 dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2577 for (i = h - 1; i; i--) {
2578 uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2579 uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2580 if (src1 == src2 || i == h - 1) {
2581 memcpy(dst, src1, w);
2583 for (index = 0; index < w; index++)
2584 dst[index] = (src1[index] + src2[index]) >> 1;
2586 dst -= s->linesize[p];
2590 if (s->flipped && !s->rgb) {
2592 ret = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2596 av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
2597 for (index=0; index<s->nb_components; index++) {
2598 uint8_t *dst = s->picture_ptr->data[index];
2599 int w = s->picture_ptr->width;
2600 int h = s->picture_ptr->height;
2601 if(index && index<3){
2602 w = AV_CEIL_RSHIFT(w, hshift);
2603 h = AV_CEIL_RSHIFT(h, vshift);
2606 uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2607 for (i=0; i<h/2; i++) {
2609 FFSWAP(int, dst[j], dst2[j]);
2610 dst += s->picture_ptr->linesize[index];
2611 dst2 -= s->picture_ptr->linesize[index];
2616 if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2617 int w = s->picture_ptr->width;
2618 int h = s->picture_ptr->height;
2619 av_assert0(s->nb_components == 4);
2620 for (i=0; i<h; i++) {
2623 for (index=0; index<4; index++) {
2624 dst[index] = s->picture_ptr->data[index]
2625 + s->picture_ptr->linesize[index]*i;
2627 for (j=0; j<w; j++) {
2629 int r = dst[0][j] * k;
2630 int g = dst[1][j] * k;
2631 int b = dst[2][j] * k;
2632 dst[0][j] = g*257 >> 16;
2633 dst[1][j] = b*257 >> 16;
2634 dst[2][j] = r*257 >> 16;
2639 if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2640 int w = s->picture_ptr->width;
2641 int h = s->picture_ptr->height;
2642 av_assert0(s->nb_components == 4);
2643 for (i=0; i<h; i++) {
2646 for (index=0; index<4; index++) {
2647 dst[index] = s->picture_ptr->data[index]
2648 + s->picture_ptr->linesize[index]*i;
2650 for (j=0; j<w; j++) {
2652 int r = (255 - dst[0][j]) * k;
2653 int g = (128 - dst[1][j]) * k;
2654 int b = (128 - dst[2][j]) * k;
2655 dst[0][j] = r*257 >> 16;
2656 dst[1][j] = (g*257 >> 16) + 128;
2657 dst[2][j] = (b*257 >> 16) + 128;
2664 AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2666 stereo->type = s->stereo3d->type;
2667 stereo->flags = s->stereo3d->flags;
2669 av_freep(&s->stereo3d);
2672 if (s->iccnum != 0 && s->iccnum == s->iccread) {
2673 AVFrameSideData *sd;
2678 /* Sum size of all parts. */
2679 for (i = 0; i < s->iccnum; i++)
2680 total_size += s->iccdatalens[i];
2682 sd = av_frame_new_side_data(data, AV_FRAME_DATA_ICC_PROFILE, total_size);
2684 av_log(s->avctx, AV_LOG_ERROR, "Could not allocate frame side data\n");
2685 return AVERROR(ENOMEM);
2688 /* Reassemble the parts, which are now in-order. */
2689 for (i = 0; i < s->iccnum; i++) {
2690 memcpy(sd->data + offset, s->iccdata[i], s->iccdatalens[i]);
2691 offset += s->iccdatalens[i];
2695 av_dict_copy(&((AVFrame *) data)->metadata, s->exif_metadata, 0);
2696 av_dict_free(&s->exif_metadata);
2699 av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2701 // return buf_end - buf_ptr;
2702 return buf_ptr - buf;
2705 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2707 MJpegDecodeContext *s = avctx->priv_data;
2710 if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2711 av_log(avctx, AV_LOG_INFO, "Single field\n");
2715 av_frame_free(&s->picture);
2716 s->picture_ptr = NULL;
2717 } else if (s->picture_ptr)
2718 av_frame_unref(s->picture_ptr);
2720 av_freep(&s->buffer);
2721 av_freep(&s->stereo3d);
2722 av_freep(&s->ljpeg_buffer);
2723 s->ljpeg_buffer_size = 0;
2725 for (i = 0; i < 3; i++) {
2726 for (j = 0; j < 4; j++)
2727 ff_free_vlc(&s->vlcs[i][j]);
2729 for (i = 0; i < MAX_COMPONENTS; i++) {
2730 av_freep(&s->blocks[i]);
2731 av_freep(&s->last_nnz[i]);
2733 av_dict_free(&s->exif_metadata);
2735 reset_icc_profile(s);
2737 av_freep(&s->hwaccel_picture_private);
2742 static void decode_flush(AVCodecContext *avctx)
2744 MJpegDecodeContext *s = avctx->priv_data;
2748 #if CONFIG_MJPEG_DECODER
2749 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2750 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2751 static const AVOption options[] = {
2752 { "extern_huff", "Use external huffman table.",
2753 OFFSET(extern_huff), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
2757 static const AVClass mjpegdec_class = {
2758 .class_name = "MJPEG decoder",
2759 .item_name = av_default_item_name,
2761 .version = LIBAVUTIL_VERSION_INT,
2764 AVCodec ff_mjpeg_decoder = {
2766 .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2767 .type = AVMEDIA_TYPE_VIDEO,
2768 .id = AV_CODEC_ID_MJPEG,
2769 .priv_data_size = sizeof(MJpegDecodeContext),
2770 .init = ff_mjpeg_decode_init,
2771 .close = ff_mjpeg_decode_end,
2772 .decode = ff_mjpeg_decode_frame,
2773 .flush = decode_flush,
2774 .capabilities = AV_CODEC_CAP_DR1,
2776 .priv_class = &mjpegdec_class,
2777 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
2778 FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2779 .hw_configs = (const AVCodecHWConfigInternal*[]) {
2784 #if CONFIG_THP_DECODER
2785 AVCodec ff_thp_decoder = {
2787 .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2788 .type = AVMEDIA_TYPE_VIDEO,
2789 .id = AV_CODEC_ID_THP,
2790 .priv_data_size = sizeof(MJpegDecodeContext),
2791 .init = ff_mjpeg_decode_init,
2792 .close = ff_mjpeg_decode_end,
2793 .decode = ff_mjpeg_decode_frame,
2794 .flush = decode_flush,
2795 .capabilities = AV_CODEC_CAP_DR1,
2797 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,