Imported Debian version 2.5.0~trusty1.1
[deb_ffmpeg.git] / ffmpeg / libavutil / frame.c
1 /*
2 *
3 * This file is part of FFmpeg.
4 *
5 * FFmpeg is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * FFmpeg is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with FFmpeg; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20 #include "channel_layout.h"
21 #include "avassert.h"
22 #include "buffer.h"
23 #include "common.h"
24 #include "dict.h"
25 #include "frame.h"
26 #include "imgutils.h"
27 #include "mem.h"
28 #include "samplefmt.h"
29
30 MAKE_ACCESSORS(AVFrame, frame, int64_t, best_effort_timestamp)
31 MAKE_ACCESSORS(AVFrame, frame, int64_t, pkt_duration)
32 MAKE_ACCESSORS(AVFrame, frame, int64_t, pkt_pos)
33 MAKE_ACCESSORS(AVFrame, frame, int64_t, channel_layout)
34 MAKE_ACCESSORS(AVFrame, frame, int, channels)
35 MAKE_ACCESSORS(AVFrame, frame, int, sample_rate)
36 MAKE_ACCESSORS(AVFrame, frame, AVDictionary *, metadata)
37 MAKE_ACCESSORS(AVFrame, frame, int, decode_error_flags)
38 MAKE_ACCESSORS(AVFrame, frame, int, pkt_size)
39 MAKE_ACCESSORS(AVFrame, frame, enum AVColorSpace, colorspace)
40 MAKE_ACCESSORS(AVFrame, frame, enum AVColorRange, color_range)
41
42 #define CHECK_CHANNELS_CONSISTENCY(frame) \
43 av_assert2(!(frame)->channel_layout || \
44 (frame)->channels == \
45 av_get_channel_layout_nb_channels((frame)->channel_layout))
46
47 AVDictionary **avpriv_frame_get_metadatap(AVFrame *frame) {return &frame->metadata;};
48
49 int av_frame_set_qp_table(AVFrame *f, AVBufferRef *buf, int stride, int qp_type)
50 {
51 av_buffer_unref(&f->qp_table_buf);
52
53 f->qp_table_buf = buf;
54
55 f->qscale_table = buf->data;
56 f->qstride = stride;
57 f->qscale_type = qp_type;
58
59 return 0;
60 }
61
62 int8_t *av_frame_get_qp_table(AVFrame *f, int *stride, int *type)
63 {
64 *stride = f->qstride;
65 *type = f->qscale_type;
66
67 if (!f->qp_table_buf)
68 return NULL;
69
70 return f->qp_table_buf->data;
71 }
72
73 const char *av_get_colorspace_name(enum AVColorSpace val)
74 {
75 static const char * const name[] = {
76 [AVCOL_SPC_RGB] = "GBR",
77 [AVCOL_SPC_BT709] = "bt709",
78 [AVCOL_SPC_FCC] = "fcc",
79 [AVCOL_SPC_BT470BG] = "bt470bg",
80 [AVCOL_SPC_SMPTE170M] = "smpte170m",
81 [AVCOL_SPC_SMPTE240M] = "smpte240m",
82 [AVCOL_SPC_YCOCG] = "YCgCo",
83 };
84 if ((unsigned)val >= FF_ARRAY_ELEMS(name))
85 return NULL;
86 return name[val];
87 }
88
89 static void get_frame_defaults(AVFrame *frame)
90 {
91 if (frame->extended_data != frame->data)
92 av_freep(&frame->extended_data);
93
94 memset(frame, 0, sizeof(*frame));
95
96 frame->pts =
97 frame->pkt_dts =
98 frame->pkt_pts = AV_NOPTS_VALUE;
99 av_frame_set_best_effort_timestamp(frame, AV_NOPTS_VALUE);
100 av_frame_set_pkt_duration (frame, 0);
101 av_frame_set_pkt_pos (frame, -1);
102 av_frame_set_pkt_size (frame, -1);
103 frame->key_frame = 1;
104 frame->sample_aspect_ratio = (AVRational){ 0, 1 };
105 frame->format = -1; /* unknown */
106 frame->extended_data = frame->data;
107 frame->color_primaries = AVCOL_PRI_UNSPECIFIED;
108 frame->color_trc = AVCOL_TRC_UNSPECIFIED;
109 frame->colorspace = AVCOL_SPC_UNSPECIFIED;
110 frame->color_range = AVCOL_RANGE_UNSPECIFIED;
111 frame->chroma_location = AVCHROMA_LOC_UNSPECIFIED;
112 }
113
114 static void free_side_data(AVFrameSideData **ptr_sd)
115 {
116 AVFrameSideData *sd = *ptr_sd;
117
118 av_freep(&sd->data);
119 av_dict_free(&sd->metadata);
120 av_freep(ptr_sd);
121 }
122
123 AVFrame *av_frame_alloc(void)
124 {
125 AVFrame *frame = av_mallocz(sizeof(*frame));
126
127 if (!frame)
128 return NULL;
129
130 frame->extended_data = NULL;
131 get_frame_defaults(frame);
132
133 return frame;
134 }
135
136 void av_frame_free(AVFrame **frame)
137 {
138 if (!frame || !*frame)
139 return;
140
141 av_frame_unref(*frame);
142 av_freep(frame);
143 }
144
145 static int get_video_buffer(AVFrame *frame, int align)
146 {
147 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
148 int ret, i;
149
150 if (!desc)
151 return AVERROR(EINVAL);
152
153 if ((ret = av_image_check_size(frame->width, frame->height, 0, NULL)) < 0)
154 return ret;
155
156 if (!frame->linesize[0]) {
157 for(i=1; i<=align; i+=i) {
158 ret = av_image_fill_linesizes(frame->linesize, frame->format,
159 FFALIGN(frame->width, i));
160 if (ret < 0)
161 return ret;
162 if (!(frame->linesize[0] & (align-1)))
163 break;
164 }
165
166 for (i = 0; i < 4 && frame->linesize[i]; i++)
167 frame->linesize[i] = FFALIGN(frame->linesize[i], align);
168 }
169
170 for (i = 0; i < 4 && frame->linesize[i]; i++) {
171 int h = FFALIGN(frame->height, 32);
172 if (i == 1 || i == 2)
173 h = FF_CEIL_RSHIFT(h, desc->log2_chroma_h);
174
175 frame->buf[i] = av_buffer_alloc(frame->linesize[i] * h + 16 + 16/*STRIDE_ALIGN*/ - 1);
176 if (!frame->buf[i])
177 goto fail;
178
179 frame->data[i] = frame->buf[i]->data;
180 }
181 if (desc->flags & AV_PIX_FMT_FLAG_PAL || desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) {
182 av_buffer_unref(&frame->buf[1]);
183 frame->buf[1] = av_buffer_alloc(1024);
184 if (!frame->buf[1])
185 goto fail;
186 frame->data[1] = frame->buf[1]->data;
187 }
188
189 frame->extended_data = frame->data;
190
191 return 0;
192 fail:
193 av_frame_unref(frame);
194 return AVERROR(ENOMEM);
195 }
196
197 static int get_audio_buffer(AVFrame *frame, int align)
198 {
199 int channels;
200 int planar = av_sample_fmt_is_planar(frame->format);
201 int planes;
202 int ret, i;
203
204 if (!frame->channels)
205 frame->channels = av_get_channel_layout_nb_channels(frame->channel_layout);
206
207 channels = frame->channels;
208 planes = planar ? channels : 1;
209
210 CHECK_CHANNELS_CONSISTENCY(frame);
211 if (!frame->linesize[0]) {
212 ret = av_samples_get_buffer_size(&frame->linesize[0], channels,
213 frame->nb_samples, frame->format,
214 align);
215 if (ret < 0)
216 return ret;
217 }
218
219 if (planes > AV_NUM_DATA_POINTERS) {
220 frame->extended_data = av_mallocz_array(planes,
221 sizeof(*frame->extended_data));
222 frame->extended_buf = av_mallocz_array((planes - AV_NUM_DATA_POINTERS),
223 sizeof(*frame->extended_buf));
224 if (!frame->extended_data || !frame->extended_buf) {
225 av_freep(&frame->extended_data);
226 av_freep(&frame->extended_buf);
227 return AVERROR(ENOMEM);
228 }
229 frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS;
230 } else
231 frame->extended_data = frame->data;
232
233 for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) {
234 frame->buf[i] = av_buffer_alloc(frame->linesize[0]);
235 if (!frame->buf[i]) {
236 av_frame_unref(frame);
237 return AVERROR(ENOMEM);
238 }
239 frame->extended_data[i] = frame->data[i] = frame->buf[i]->data;
240 }
241 for (i = 0; i < planes - AV_NUM_DATA_POINTERS; i++) {
242 frame->extended_buf[i] = av_buffer_alloc(frame->linesize[0]);
243 if (!frame->extended_buf[i]) {
244 av_frame_unref(frame);
245 return AVERROR(ENOMEM);
246 }
247 frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data;
248 }
249 return 0;
250
251 }
252
253 int av_frame_get_buffer(AVFrame *frame, int align)
254 {
255 if (frame->format < 0)
256 return AVERROR(EINVAL);
257
258 if (frame->width > 0 && frame->height > 0)
259 return get_video_buffer(frame, align);
260 else if (frame->nb_samples > 0 && (frame->channel_layout || frame->channels > 0))
261 return get_audio_buffer(frame, align);
262
263 return AVERROR(EINVAL);
264 }
265
266 int av_frame_ref(AVFrame *dst, const AVFrame *src)
267 {
268 int i, ret = 0;
269
270 dst->format = src->format;
271 dst->width = src->width;
272 dst->height = src->height;
273 dst->channels = src->channels;
274 dst->channel_layout = src->channel_layout;
275 dst->nb_samples = src->nb_samples;
276
277 ret = av_frame_copy_props(dst, src);
278 if (ret < 0)
279 return ret;
280
281 /* duplicate the frame data if it's not refcounted */
282 if (!src->buf[0]) {
283 ret = av_frame_get_buffer(dst, 32);
284 if (ret < 0)
285 return ret;
286
287 ret = av_frame_copy(dst, src);
288 if (ret < 0)
289 av_frame_unref(dst);
290
291 return ret;
292 }
293
294 /* ref the buffers */
295 for (i = 0; i < FF_ARRAY_ELEMS(src->buf); i++) {
296 if (!src->buf[i])
297 continue;
298 dst->buf[i] = av_buffer_ref(src->buf[i]);
299 if (!dst->buf[i]) {
300 ret = AVERROR(ENOMEM);
301 goto fail;
302 }
303 }
304
305 if (src->extended_buf) {
306 dst->extended_buf = av_mallocz_array(sizeof(*dst->extended_buf),
307 src->nb_extended_buf);
308 if (!dst->extended_buf) {
309 ret = AVERROR(ENOMEM);
310 goto fail;
311 }
312 dst->nb_extended_buf = src->nb_extended_buf;
313
314 for (i = 0; i < src->nb_extended_buf; i++) {
315 dst->extended_buf[i] = av_buffer_ref(src->extended_buf[i]);
316 if (!dst->extended_buf[i]) {
317 ret = AVERROR(ENOMEM);
318 goto fail;
319 }
320 }
321 }
322
323 /* duplicate extended data */
324 if (src->extended_data != src->data) {
325 int ch = src->channels;
326
327 if (!ch) {
328 ret = AVERROR(EINVAL);
329 goto fail;
330 }
331 CHECK_CHANNELS_CONSISTENCY(src);
332
333 dst->extended_data = av_malloc_array(sizeof(*dst->extended_data), ch);
334 if (!dst->extended_data) {
335 ret = AVERROR(ENOMEM);
336 goto fail;
337 }
338 memcpy(dst->extended_data, src->extended_data, sizeof(*src->extended_data) * ch);
339 } else
340 dst->extended_data = dst->data;
341
342 memcpy(dst->data, src->data, sizeof(src->data));
343 memcpy(dst->linesize, src->linesize, sizeof(src->linesize));
344
345 return 0;
346
347 fail:
348 av_frame_unref(dst);
349 return ret;
350 }
351
352 AVFrame *av_frame_clone(const AVFrame *src)
353 {
354 AVFrame *ret = av_frame_alloc();
355
356 if (!ret)
357 return NULL;
358
359 if (av_frame_ref(ret, src) < 0)
360 av_frame_free(&ret);
361
362 return ret;
363 }
364
365 void av_frame_unref(AVFrame *frame)
366 {
367 int i;
368
369 for (i = 0; i < frame->nb_side_data; i++) {
370 free_side_data(&frame->side_data[i]);
371 }
372 av_freep(&frame->side_data);
373
374 for (i = 0; i < FF_ARRAY_ELEMS(frame->buf); i++)
375 av_buffer_unref(&frame->buf[i]);
376 for (i = 0; i < frame->nb_extended_buf; i++)
377 av_buffer_unref(&frame->extended_buf[i]);
378 av_freep(&frame->extended_buf);
379 av_dict_free(&frame->metadata);
380 av_buffer_unref(&frame->qp_table_buf);
381
382 get_frame_defaults(frame);
383 }
384
385 void av_frame_move_ref(AVFrame *dst, AVFrame *src)
386 {
387 *dst = *src;
388 if (src->extended_data == src->data)
389 dst->extended_data = dst->data;
390 memset(src, 0, sizeof(*src));
391 get_frame_defaults(src);
392 }
393
394 int av_frame_is_writable(AVFrame *frame)
395 {
396 int i, ret = 1;
397
398 /* assume non-refcounted frames are not writable */
399 if (!frame->buf[0])
400 return 0;
401
402 for (i = 0; i < FF_ARRAY_ELEMS(frame->buf); i++)
403 if (frame->buf[i])
404 ret &= !!av_buffer_is_writable(frame->buf[i]);
405 for (i = 0; i < frame->nb_extended_buf; i++)
406 ret &= !!av_buffer_is_writable(frame->extended_buf[i]);
407
408 return ret;
409 }
410
411 int av_frame_make_writable(AVFrame *frame)
412 {
413 AVFrame tmp;
414 int ret;
415
416 if (!frame->buf[0])
417 return AVERROR(EINVAL);
418
419 if (av_frame_is_writable(frame))
420 return 0;
421
422 memset(&tmp, 0, sizeof(tmp));
423 tmp.format = frame->format;
424 tmp.width = frame->width;
425 tmp.height = frame->height;
426 tmp.channels = frame->channels;
427 tmp.channel_layout = frame->channel_layout;
428 tmp.nb_samples = frame->nb_samples;
429 ret = av_frame_get_buffer(&tmp, 32);
430 if (ret < 0)
431 return ret;
432
433 ret = av_frame_copy(&tmp, frame);
434 if (ret < 0) {
435 av_frame_unref(&tmp);
436 return ret;
437 }
438
439 ret = av_frame_copy_props(&tmp, frame);
440 if (ret < 0) {
441 av_frame_unref(&tmp);
442 return ret;
443 }
444
445 av_frame_unref(frame);
446
447 *frame = tmp;
448 if (tmp.data == tmp.extended_data)
449 frame->extended_data = frame->data;
450
451 return 0;
452 }
453
454 int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
455 {
456 int i;
457
458 dst->key_frame = src->key_frame;
459 dst->pict_type = src->pict_type;
460 dst->sample_aspect_ratio = src->sample_aspect_ratio;
461 dst->pts = src->pts;
462 dst->repeat_pict = src->repeat_pict;
463 dst->interlaced_frame = src->interlaced_frame;
464 dst->top_field_first = src->top_field_first;
465 dst->palette_has_changed = src->palette_has_changed;
466 dst->sample_rate = src->sample_rate;
467 dst->opaque = src->opaque;
468 #if FF_API_AVFRAME_LAVC
469 dst->type = src->type;
470 #endif
471 dst->pkt_pts = src->pkt_pts;
472 dst->pkt_dts = src->pkt_dts;
473 dst->pkt_pos = src->pkt_pos;
474 dst->pkt_size = src->pkt_size;
475 dst->pkt_duration = src->pkt_duration;
476 dst->reordered_opaque = src->reordered_opaque;
477 dst->quality = src->quality;
478 dst->best_effort_timestamp = src->best_effort_timestamp;
479 dst->coded_picture_number = src->coded_picture_number;
480 dst->display_picture_number = src->display_picture_number;
481 dst->flags = src->flags;
482 dst->decode_error_flags = src->decode_error_flags;
483 dst->color_primaries = src->color_primaries;
484 dst->color_trc = src->color_trc;
485 dst->colorspace = src->colorspace;
486 dst->color_range = src->color_range;
487 dst->chroma_location = src->chroma_location;
488
489 av_dict_copy(&dst->metadata, src->metadata, 0);
490
491 memcpy(dst->error, src->error, sizeof(dst->error));
492
493 for (i = 0; i < src->nb_side_data; i++) {
494 const AVFrameSideData *sd_src = src->side_data[i];
495 AVFrameSideData *sd_dst;
496 if ( sd_src->type == AV_FRAME_DATA_PANSCAN
497 && (src->width != dst->width || src->height != dst->height))
498 continue;
499 sd_dst = av_frame_new_side_data(dst, sd_src->type,
500 sd_src->size);
501 if (!sd_dst) {
502 for (i = 0; i < dst->nb_side_data; i++) {
503 free_side_data(&dst->side_data[i]);
504 }
505 av_freep(&dst->side_data);
506 return AVERROR(ENOMEM);
507 }
508 memcpy(sd_dst->data, sd_src->data, sd_src->size);
509 av_dict_copy(&sd_dst->metadata, sd_src->metadata, 0);
510 }
511
512 dst->qscale_table = NULL;
513 dst->qstride = 0;
514 dst->qscale_type = 0;
515 if (src->qp_table_buf) {
516 dst->qp_table_buf = av_buffer_ref(src->qp_table_buf);
517 if (dst->qp_table_buf) {
518 dst->qscale_table = dst->qp_table_buf->data;
519 dst->qstride = src->qstride;
520 dst->qscale_type = src->qscale_type;
521 }
522 }
523
524 return 0;
525 }
526
527 AVBufferRef *av_frame_get_plane_buffer(AVFrame *frame, int plane)
528 {
529 uint8_t *data;
530 int planes, i;
531
532 if (frame->nb_samples) {
533 int channels = frame->channels;
534 if (!channels)
535 return NULL;
536 CHECK_CHANNELS_CONSISTENCY(frame);
537 planes = av_sample_fmt_is_planar(frame->format) ? channels : 1;
538 } else
539 planes = 4;
540
541 if (plane < 0 || plane >= planes || !frame->extended_data[plane])
542 return NULL;
543 data = frame->extended_data[plane];
544
545 for (i = 0; i < FF_ARRAY_ELEMS(frame->buf) && frame->buf[i]; i++) {
546 AVBufferRef *buf = frame->buf[i];
547 if (data >= buf->data && data < buf->data + buf->size)
548 return buf;
549 }
550 for (i = 0; i < frame->nb_extended_buf; i++) {
551 AVBufferRef *buf = frame->extended_buf[i];
552 if (data >= buf->data && data < buf->data + buf->size)
553 return buf;
554 }
555 return NULL;
556 }
557
558 AVFrameSideData *av_frame_new_side_data(AVFrame *frame,
559 enum AVFrameSideDataType type,
560 int size)
561 {
562 AVFrameSideData *ret, **tmp;
563
564 if (frame->nb_side_data > INT_MAX / sizeof(*frame->side_data) - 1)
565 return NULL;
566
567 tmp = av_realloc(frame->side_data,
568 (frame->nb_side_data + 1) * sizeof(*frame->side_data));
569 if (!tmp)
570 return NULL;
571 frame->side_data = tmp;
572
573 ret = av_mallocz(sizeof(*ret));
574 if (!ret)
575 return NULL;
576
577 ret->data = av_malloc(size);
578 if (!ret->data) {
579 av_freep(&ret);
580 return NULL;
581 }
582
583 ret->size = size;
584 ret->type = type;
585
586 frame->side_data[frame->nb_side_data++] = ret;
587
588 return ret;
589 }
590
591 AVFrameSideData *av_frame_get_side_data(const AVFrame *frame,
592 enum AVFrameSideDataType type)
593 {
594 int i;
595
596 for (i = 0; i < frame->nb_side_data; i++) {
597 if (frame->side_data[i]->type == type)
598 return frame->side_data[i];
599 }
600 return NULL;
601 }
602
603 static int frame_copy_video(AVFrame *dst, const AVFrame *src)
604 {
605 const uint8_t *src_data[4];
606 int i, planes;
607
608 if (dst->width < src->width ||
609 dst->height < src->height)
610 return AVERROR(EINVAL);
611
612 planes = av_pix_fmt_count_planes(dst->format);
613 for (i = 0; i < planes; i++)
614 if (!dst->data[i] || !src->data[i])
615 return AVERROR(EINVAL);
616
617 memcpy(src_data, src->data, sizeof(src_data));
618 av_image_copy(dst->data, dst->linesize,
619 src_data, src->linesize,
620 dst->format, src->width, src->height);
621
622 return 0;
623 }
624
625 static int frame_copy_audio(AVFrame *dst, const AVFrame *src)
626 {
627 int planar = av_sample_fmt_is_planar(dst->format);
628 int channels = dst->channels;
629 int planes = planar ? channels : 1;
630 int i;
631
632 if (dst->nb_samples != src->nb_samples ||
633 dst->channels != src->channels ||
634 dst->channel_layout != src->channel_layout)
635 return AVERROR(EINVAL);
636
637 CHECK_CHANNELS_CONSISTENCY(src);
638
639 for (i = 0; i < planes; i++)
640 if (!dst->extended_data[i] || !src->extended_data[i])
641 return AVERROR(EINVAL);
642
643 av_samples_copy(dst->extended_data, src->extended_data, 0, 0,
644 dst->nb_samples, channels, dst->format);
645
646 return 0;
647 }
648
649 int av_frame_copy(AVFrame *dst, const AVFrame *src)
650 {
651 if (dst->format != src->format || dst->format < 0)
652 return AVERROR(EINVAL);
653
654 if (dst->width > 0 && dst->height > 0)
655 return frame_copy_video(dst, src);
656 else if (dst->nb_samples > 0 && dst->channel_layout)
657 return frame_copy_audio(dst, src);
658
659 return AVERROR(EINVAL);
660 }
661
662 void av_frame_remove_side_data(AVFrame *frame, enum AVFrameSideDataType type)
663 {
664 int i;
665
666 for (i = 0; i < frame->nb_side_data; i++) {
667 AVFrameSideData *sd = frame->side_data[i];
668 if (sd->type == type) {
669 free_side_data(&frame->side_data[i]);
670 frame->side_data[i] = frame->side_data[frame->nb_side_data - 1];
671 frame->nb_side_data--;
672 }
673 }
674 }
675
676 const char *av_frame_side_data_name(enum AVFrameSideDataType type)
677 {
678 switch(type) {
679 case AV_FRAME_DATA_PANSCAN: return "AVPanScan";
680 case AV_FRAME_DATA_A53_CC: return "ATSC A53 Part 4 Closed Captions";
681 case AV_FRAME_DATA_STEREO3D: return "Stereoscopic 3d metadata";
682 case AV_FRAME_DATA_MATRIXENCODING: return "AVMatrixEncoding";
683 case AV_FRAME_DATA_DOWNMIX_INFO: return "Metadata relevant to a downmix procedure";
684 case AV_FRAME_DATA_REPLAYGAIN: return "AVReplayGain";
685 case AV_FRAME_DATA_DISPLAYMATRIX: return "3x3 displaymatrix";
686 case AV_FRAME_DATA_MOTION_VECTORS: return "Motion vectors";
687 }
688 return NULL;
689 }