avcodec: Do not lock during open for codecs marked as having threadsafe init
[libav.git] / libavcodec / utils.c
1 /*
2 * utils for libavcodec
3 * Copyright (c) 2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5 *
6 * This file is part of Libav.
7 *
8 * Libav is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * Libav is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with Libav; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 /**
24 * @file
25 * utils.
26 */
27
28 #include "config.h"
29 #include "libavutil/attributes.h"
30 #include "libavutil/avassert.h"
31 #include "libavutil/avstring.h"
32 #include "libavutil/channel_layout.h"
33 #include "libavutil/crc.h"
34 #include "libavutil/frame.h"
35 #include "libavutil/internal.h"
36 #include "libavutil/mathematics.h"
37 #include "libavutil/pixdesc.h"
38 #include "libavutil/imgutils.h"
39 #include "libavutil/samplefmt.h"
40 #include "libavutil/dict.h"
41 #include "avcodec.h"
42 #include "libavutil/opt.h"
43 #include "me_cmp.h"
44 #include "mpegvideo.h"
45 #include "thread.h"
46 #include "internal.h"
47 #include "bytestream.h"
48 #include "version.h"
49 #include <stdlib.h>
50 #include <stdarg.h>
51 #include <limits.h>
52 #include <float.h>
53
54 static int volatile entangled_thread_counter = 0;
55 static int (*lockmgr_cb)(void **mutex, enum AVLockOp op);
56 static void *codec_mutex;
57 static void *avformat_mutex;
58
59 void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
60 {
61 void **p = ptr;
62 if (min_size > SIZE_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {
63 av_freep(p);
64 *size = 0;
65 return;
66 }
67 av_fast_malloc(p, size, min_size + AV_INPUT_BUFFER_PADDING_SIZE);
68 if (*size)
69 memset((uint8_t *)*p + min_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
70 }
71
72 /* encoder management */
73 static AVCodec *first_avcodec = NULL;
74
75 AVCodec *av_codec_next(const AVCodec *c)
76 {
77 if (c)
78 return c->next;
79 else
80 return first_avcodec;
81 }
82
83 static av_cold void avcodec_init(void)
84 {
85 static int initialized = 0;
86
87 if (initialized != 0)
88 return;
89 initialized = 1;
90
91 if (CONFIG_ME_CMP)
92 ff_me_cmp_init_static();
93 }
94
95 int av_codec_is_encoder(const AVCodec *codec)
96 {
97 return codec && (codec->encode_sub || codec->encode2);
98 }
99
100 int av_codec_is_decoder(const AVCodec *codec)
101 {
102 return codec && codec->decode;
103 }
104
105 av_cold void avcodec_register(AVCodec *codec)
106 {
107 AVCodec **p;
108 avcodec_init();
109 p = &first_avcodec;
110 while (*p)
111 p = &(*p)->next;
112 *p = codec;
113 codec->next = NULL;
114
115 if (codec->init_static_data)
116 codec->init_static_data(codec);
117 }
118
119 #if FF_API_EMU_EDGE
120 unsigned avcodec_get_edge_width(void)
121 {
122 return EDGE_WIDTH;
123 }
124 #endif
125
126 #if FF_API_SET_DIMENSIONS
127 void avcodec_set_dimensions(AVCodecContext *s, int width, int height)
128 {
129 ff_set_dimensions(s, width, height);
130 }
131 #endif
132
133 int ff_set_dimensions(AVCodecContext *s, int width, int height)
134 {
135 int ret = av_image_check_size(width, height, 0, s);
136
137 if (ret < 0)
138 width = height = 0;
139 s->width = s->coded_width = width;
140 s->height = s->coded_height = height;
141
142 return ret;
143 }
144
145 int ff_set_sar(AVCodecContext *avctx, AVRational sar)
146 {
147 int ret = av_image_check_sar(avctx->width, avctx->height, sar);
148
149 if (ret < 0) {
150 av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %d/%d\n",
151 sar.num, sar.den);
152 avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
153 return ret;
154 } else {
155 avctx->sample_aspect_ratio = sar;
156 }
157 return 0;
158 }
159
160 int ff_side_data_update_matrix_encoding(AVFrame *frame,
161 enum AVMatrixEncoding matrix_encoding)
162 {
163 AVFrameSideData *side_data;
164 enum AVMatrixEncoding *data;
165
166 side_data = av_frame_get_side_data(frame, AV_FRAME_DATA_MATRIXENCODING);
167 if (!side_data)
168 side_data = av_frame_new_side_data(frame, AV_FRAME_DATA_MATRIXENCODING,
169 sizeof(enum AVMatrixEncoding));
170
171 if (!side_data)
172 return AVERROR(ENOMEM);
173
174 data = (enum AVMatrixEncoding*)side_data->data;
175 *data = matrix_encoding;
176
177 return 0;
178 }
179
180 #if HAVE_SIMD_ALIGN_16
181 # define STRIDE_ALIGN 16
182 #else
183 # define STRIDE_ALIGN 8
184 #endif
185
186 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
187 int linesize_align[AV_NUM_DATA_POINTERS])
188 {
189 int i;
190 int w_align = 1;
191 int h_align = 1;
192
193 switch (s->pix_fmt) {
194 case AV_PIX_FMT_YUV420P:
195 case AV_PIX_FMT_YUYV422:
196 case AV_PIX_FMT_YVYU422:
197 case AV_PIX_FMT_UYVY422:
198 case AV_PIX_FMT_YUV422P:
199 case AV_PIX_FMT_YUV440P:
200 case AV_PIX_FMT_YUV444P:
201 case AV_PIX_FMT_GBRP:
202 case AV_PIX_FMT_GBRAP:
203 case AV_PIX_FMT_GRAY8:
204 case AV_PIX_FMT_GRAY16BE:
205 case AV_PIX_FMT_GRAY16LE:
206 case AV_PIX_FMT_YUVJ420P:
207 case AV_PIX_FMT_YUVJ422P:
208 case AV_PIX_FMT_YUVJ440P:
209 case AV_PIX_FMT_YUVJ444P:
210 case AV_PIX_FMT_YUVA420P:
211 case AV_PIX_FMT_YUVA422P:
212 case AV_PIX_FMT_YUVA444P:
213 case AV_PIX_FMT_YUV420P9LE:
214 case AV_PIX_FMT_YUV420P9BE:
215 case AV_PIX_FMT_YUV420P10LE:
216 case AV_PIX_FMT_YUV420P10BE:
217 case AV_PIX_FMT_YUV422P9LE:
218 case AV_PIX_FMT_YUV422P9BE:
219 case AV_PIX_FMT_YUV422P10LE:
220 case AV_PIX_FMT_YUV422P10BE:
221 case AV_PIX_FMT_YUVA422P10LE:
222 case AV_PIX_FMT_YUVA422P10BE:
223 case AV_PIX_FMT_YUV444P9LE:
224 case AV_PIX_FMT_YUV444P9BE:
225 case AV_PIX_FMT_YUV444P10LE:
226 case AV_PIX_FMT_YUV444P10BE:
227 case AV_PIX_FMT_YUVA444P10LE:
228 case AV_PIX_FMT_YUVA444P10BE:
229 case AV_PIX_FMT_GBRP9LE:
230 case AV_PIX_FMT_GBRP9BE:
231 case AV_PIX_FMT_GBRP10LE:
232 case AV_PIX_FMT_GBRP10BE:
233 w_align = 16; //FIXME assume 16 pixel per macroblock
234 h_align = 16 * 2; // interlaced needs 2 macroblocks height
235 break;
236 case AV_PIX_FMT_YUV411P:
237 case AV_PIX_FMT_UYYVYY411:
238 w_align = 32;
239 h_align = 8;
240 break;
241 case AV_PIX_FMT_YUV410P:
242 if (s->codec_id == AV_CODEC_ID_SVQ1) {
243 w_align = 64;
244 h_align = 64;
245 }
246 case AV_PIX_FMT_RGB555:
247 if (s->codec_id == AV_CODEC_ID_RPZA) {
248 w_align = 4;
249 h_align = 4;
250 }
251 case AV_PIX_FMT_PAL8:
252 case AV_PIX_FMT_BGR8:
253 case AV_PIX_FMT_RGB8:
254 if (s->codec_id == AV_CODEC_ID_SMC) {
255 w_align = 4;
256 h_align = 4;
257 }
258 break;
259 case AV_PIX_FMT_BGR24:
260 if ((s->codec_id == AV_CODEC_ID_MSZH) ||
261 (s->codec_id == AV_CODEC_ID_ZLIB)) {
262 w_align = 4;
263 h_align = 4;
264 }
265 break;
266 default:
267 w_align = 1;
268 h_align = 1;
269 break;
270 }
271
272 *width = FFALIGN(*width, w_align);
273 *height = FFALIGN(*height, h_align);
274 if (s->codec_id == AV_CODEC_ID_H264)
275 // some of the optimized chroma MC reads one line too much
276 *height += 2;
277
278 for (i = 0; i < 4; i++)
279 linesize_align[i] = STRIDE_ALIGN;
280 }
281
282 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height)
283 {
284 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(s->pix_fmt);
285 int chroma_shift = desc->log2_chroma_w;
286 int linesize_align[AV_NUM_DATA_POINTERS];
287 int align;
288
289 avcodec_align_dimensions2(s, width, height, linesize_align);
290 align = FFMAX(linesize_align[0], linesize_align[3]);
291 linesize_align[1] <<= chroma_shift;
292 linesize_align[2] <<= chroma_shift;
293 align = FFMAX3(align, linesize_align[1], linesize_align[2]);
294 *width = FFALIGN(*width, align);
295 }
296
297 int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
298 enum AVSampleFormat sample_fmt, const uint8_t *buf,
299 int buf_size, int align)
300 {
301 int ch, planar, needed_size, ret = 0;
302
303 needed_size = av_samples_get_buffer_size(NULL, nb_channels,
304 frame->nb_samples, sample_fmt,
305 align);
306 if (buf_size < needed_size)
307 return AVERROR(EINVAL);
308
309 planar = av_sample_fmt_is_planar(sample_fmt);
310 if (planar && nb_channels > AV_NUM_DATA_POINTERS) {
311 if (!(frame->extended_data = av_mallocz(nb_channels *
312 sizeof(*frame->extended_data))))
313 return AVERROR(ENOMEM);
314 } else {
315 frame->extended_data = frame->data;
316 }
317
318 if ((ret = av_samples_fill_arrays(frame->extended_data, &frame->linesize[0],
319 buf, nb_channels, frame->nb_samples,
320 sample_fmt, align)) < 0) {
321 if (frame->extended_data != frame->data)
322 av_free(frame->extended_data);
323 return ret;
324 }
325 if (frame->extended_data != frame->data) {
326 for (ch = 0; ch < AV_NUM_DATA_POINTERS; ch++)
327 frame->data[ch] = frame->extended_data[ch];
328 }
329
330 return ret;
331 }
332
333 static int update_frame_pool(AVCodecContext *avctx, AVFrame *frame)
334 {
335 FramePool *pool = avctx->internal->pool;
336 int i, ret;
337
338 switch (avctx->codec_type) {
339 case AVMEDIA_TYPE_VIDEO: {
340 AVPicture picture;
341 int size[4] = { 0 };
342 int w = frame->width;
343 int h = frame->height;
344 int tmpsize, unaligned;
345
346 if (pool->format == frame->format &&
347 pool->width == frame->width && pool->height == frame->height)
348 return 0;
349
350 avcodec_align_dimensions2(avctx, &w, &h, pool->stride_align);
351
352 do {
353 // NOTE: do not align linesizes individually, this breaks e.g. assumptions
354 // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
355 av_image_fill_linesizes(picture.linesize, avctx->pix_fmt, w);
356 // increase alignment of w for next try (rhs gives the lowest bit set in w)
357 w += w & ~(w - 1);
358
359 unaligned = 0;
360 for (i = 0; i < 4; i++)
361 unaligned |= picture.linesize[i] % pool->stride_align[i];
362 } while (unaligned);
363
364 tmpsize = av_image_fill_pointers(picture.data, avctx->pix_fmt, h,
365 NULL, picture.linesize);
366 if (tmpsize < 0)
367 return -1;
368
369 for (i = 0; i < 3 && picture.data[i + 1]; i++)
370 size[i] = picture.data[i + 1] - picture.data[i];
371 size[i] = tmpsize - (picture.data[i] - picture.data[0]);
372
373 for (i = 0; i < 4; i++) {
374 av_buffer_pool_uninit(&pool->pools[i]);
375 pool->linesize[i] = picture.linesize[i];
376 if (size[i]) {
377 pool->pools[i] = av_buffer_pool_init(size[i] + 16, NULL);
378 if (!pool->pools[i]) {
379 ret = AVERROR(ENOMEM);
380 goto fail;
381 }
382 }
383 }
384 pool->format = frame->format;
385 pool->width = frame->width;
386 pool->height = frame->height;
387
388 break;
389 }
390 case AVMEDIA_TYPE_AUDIO: {
391 int ch = av_get_channel_layout_nb_channels(frame->channel_layout);
392 int planar = av_sample_fmt_is_planar(frame->format);
393 int planes = planar ? ch : 1;
394
395 if (pool->format == frame->format && pool->planes == planes &&
396 pool->channels == ch && frame->nb_samples == pool->samples)
397 return 0;
398
399 av_buffer_pool_uninit(&pool->pools[0]);
400 ret = av_samples_get_buffer_size(&pool->linesize[0], ch,
401 frame->nb_samples, frame->format, 0);
402 if (ret < 0)
403 goto fail;
404
405 pool->pools[0] = av_buffer_pool_init(pool->linesize[0], NULL);
406 if (!pool->pools[0]) {
407 ret = AVERROR(ENOMEM);
408 goto fail;
409 }
410
411 pool->format = frame->format;
412 pool->planes = planes;
413 pool->channels = ch;
414 pool->samples = frame->nb_samples;
415 break;
416 }
417 default: av_assert0(0);
418 }
419 return 0;
420 fail:
421 for (i = 0; i < 4; i++)
422 av_buffer_pool_uninit(&pool->pools[i]);
423 pool->format = -1;
424 pool->planes = pool->channels = pool->samples = 0;
425 pool->width = pool->height = 0;
426 return ret;
427 }
428
429 static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
430 {
431 FramePool *pool = avctx->internal->pool;
432 int planes = pool->planes;
433 int i;
434
435 frame->linesize[0] = pool->linesize[0];
436
437 if (planes > AV_NUM_DATA_POINTERS) {
438 frame->extended_data = av_mallocz(planes * sizeof(*frame->extended_data));
439 frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS;
440 frame->extended_buf = av_mallocz(frame->nb_extended_buf *
441 sizeof(*frame->extended_buf));
442 if (!frame->extended_data || !frame->extended_buf) {
443 av_freep(&frame->extended_data);
444 av_freep(&frame->extended_buf);
445 return AVERROR(ENOMEM);
446 }
447 } else
448 frame->extended_data = frame->data;
449
450 for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) {
451 frame->buf[i] = av_buffer_pool_get(pool->pools[0]);
452 if (!frame->buf[i])
453 goto fail;
454 frame->extended_data[i] = frame->data[i] = frame->buf[i]->data;
455 }
456 for (i = 0; i < frame->nb_extended_buf; i++) {
457 frame->extended_buf[i] = av_buffer_pool_get(pool->pools[0]);
458 if (!frame->extended_buf[i])
459 goto fail;
460 frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data;
461 }
462
463 if (avctx->debug & FF_DEBUG_BUFFERS)
464 av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p", frame);
465
466 return 0;
467 fail:
468 av_frame_unref(frame);
469 return AVERROR(ENOMEM);
470 }
471
472 static int video_get_buffer(AVCodecContext *s, AVFrame *pic)
473 {
474 FramePool *pool = s->internal->pool;
475 int i;
476
477 if (pic->data[0]) {
478 av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
479 return -1;
480 }
481
482 memset(pic->data, 0, sizeof(pic->data));
483 pic->extended_data = pic->data;
484
485 for (i = 0; i < 4 && pool->pools[i]; i++) {
486 pic->linesize[i] = pool->linesize[i];
487
488 pic->buf[i] = av_buffer_pool_get(pool->pools[i]);
489 if (!pic->buf[i])
490 goto fail;
491
492 pic->data[i] = pic->buf[i]->data;
493 }
494 for (; i < AV_NUM_DATA_POINTERS; i++) {
495 pic->data[i] = NULL;
496 pic->linesize[i] = 0;
497 }
498 if (pic->data[1] && !pic->data[2])
499 avpriv_set_systematic_pal2((uint32_t *)pic->data[1], s->pix_fmt);
500
501 if (s->debug & FF_DEBUG_BUFFERS)
502 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p\n", pic);
503
504 return 0;
505 fail:
506 av_frame_unref(pic);
507 return AVERROR(ENOMEM);
508 }
509
510 int avcodec_default_get_buffer2(AVCodecContext *avctx, AVFrame *frame, int flags)
511 {
512 int ret;
513
514 if ((ret = update_frame_pool(avctx, frame)) < 0)
515 return ret;
516
517 switch (avctx->codec_type) {
518 case AVMEDIA_TYPE_VIDEO:
519 return video_get_buffer(avctx, frame);
520 case AVMEDIA_TYPE_AUDIO:
521 return audio_get_buffer(avctx, frame);
522 default:
523 return -1;
524 }
525 }
526
527 int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame)
528 {
529 AVPacket *pkt = avctx->internal->pkt;
530 int i;
531 struct {
532 enum AVPacketSideDataType packet;
533 enum AVFrameSideDataType frame;
534 } sd[] = {
535 { AV_PKT_DATA_REPLAYGAIN , AV_FRAME_DATA_REPLAYGAIN },
536 { AV_PKT_DATA_DISPLAYMATRIX, AV_FRAME_DATA_DISPLAYMATRIX },
537 { AV_PKT_DATA_STEREO3D, AV_FRAME_DATA_STEREO3D },
538 { AV_PKT_DATA_AUDIO_SERVICE_TYPE, AV_FRAME_DATA_AUDIO_SERVICE_TYPE },
539 };
540
541 frame->color_primaries = avctx->color_primaries;
542 frame->color_trc = avctx->color_trc;
543 frame->colorspace = avctx->colorspace;
544 frame->color_range = avctx->color_range;
545 frame->chroma_location = avctx->chroma_sample_location;
546
547 frame->reordered_opaque = avctx->reordered_opaque;
548 if (!pkt) {
549 frame->pkt_pts = AV_NOPTS_VALUE;
550 return 0;
551 }
552
553 frame->pkt_pts = pkt->pts;
554
555 for (i = 0; i < FF_ARRAY_ELEMS(sd); i++) {
556 int size;
557 uint8_t *packet_sd = av_packet_get_side_data(pkt, sd[i].packet, &size);
558 if (packet_sd) {
559 AVFrameSideData *frame_sd = av_frame_new_side_data(frame,
560 sd[i].frame,
561 size);
562 if (!frame_sd)
563 return AVERROR(ENOMEM);
564
565 memcpy(frame_sd->data, packet_sd, size);
566 }
567 }
568
569 return 0;
570 }
571
572 int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
573 {
574 const AVHWAccel *hwaccel = avctx->hwaccel;
575 int override_dimensions = 1;
576 int ret;
577
578 switch (avctx->codec_type) {
579 case AVMEDIA_TYPE_VIDEO:
580 if (frame->width <= 0 || frame->height <= 0) {
581 frame->width = FFMAX(avctx->width, avctx->coded_width);
582 frame->height = FFMAX(avctx->height, avctx->coded_height);
583 override_dimensions = 0;
584 }
585 if (frame->format < 0)
586 frame->format = avctx->pix_fmt;
587 if (!frame->sample_aspect_ratio.num)
588 frame->sample_aspect_ratio = avctx->sample_aspect_ratio;
589
590 if (av_image_check_sar(frame->width, frame->height,
591 frame->sample_aspect_ratio) < 0) {
592 av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
593 frame->sample_aspect_ratio.num,
594 frame->sample_aspect_ratio.den);
595 frame->sample_aspect_ratio = (AVRational){ 0, 1 };
596 }
597
598 if ((ret = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
599 return ret;
600 break;
601 case AVMEDIA_TYPE_AUDIO:
602 if (!frame->sample_rate)
603 frame->sample_rate = avctx->sample_rate;
604 if (frame->format < 0)
605 frame->format = avctx->sample_fmt;
606 if (!frame->channel_layout) {
607 if (avctx->channel_layout) {
608 if (av_get_channel_layout_nb_channels(avctx->channel_layout) !=
609 avctx->channels) {
610 av_log(avctx, AV_LOG_ERROR, "Inconsistent channel "
611 "configuration.\n");
612 return AVERROR(EINVAL);
613 }
614
615 frame->channel_layout = avctx->channel_layout;
616 } else {
617 if (avctx->channels > FF_SANE_NB_CHANNELS) {
618 av_log(avctx, AV_LOG_ERROR, "Too many channels: %d.\n",
619 avctx->channels);
620 return AVERROR(ENOSYS);
621 }
622
623 frame->channel_layout = av_get_default_channel_layout(avctx->channels);
624 if (!frame->channel_layout)
625 frame->channel_layout = (1ULL << avctx->channels) - 1;
626 }
627 }
628 break;
629 default: return AVERROR(EINVAL);
630 }
631
632 ret = ff_decode_frame_props(avctx, frame);
633 if (ret < 0)
634 return ret;
635
636 if (hwaccel) {
637 if (hwaccel->alloc_frame) {
638 ret = hwaccel->alloc_frame(avctx, frame);
639 goto end;
640 }
641 } else
642 avctx->sw_pix_fmt = avctx->pix_fmt;
643
644 ret = avctx->get_buffer2(avctx, frame, flags);
645
646 end:
647 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO && !override_dimensions) {
648 frame->width = avctx->width;
649 frame->height = avctx->height;
650 }
651
652 return ret;
653 }
654
655 int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame)
656 {
657 AVFrame *tmp;
658 int ret;
659
660 av_assert0(avctx->codec_type == AVMEDIA_TYPE_VIDEO);
661
662 if (!frame->data[0])
663 return ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
664
665 if (av_frame_is_writable(frame))
666 return ff_decode_frame_props(avctx, frame);
667
668 tmp = av_frame_alloc();
669 if (!tmp)
670 return AVERROR(ENOMEM);
671
672 av_frame_move_ref(tmp, frame);
673
674 ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
675 if (ret < 0) {
676 av_frame_free(&tmp);
677 return ret;
678 }
679
680 av_frame_copy(frame, tmp);
681 av_frame_free(&tmp);
682
683 return 0;
684 }
685
686 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size)
687 {
688 int i;
689
690 for (i = 0; i < count; i++) {
691 int r = func(c, (char *)arg + i * size);
692 if (ret)
693 ret[i] = r;
694 }
695 return 0;
696 }
697
698 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr), void *arg, int *ret, int count)
699 {
700 int i;
701
702 for (i = 0; i < count; i++) {
703 int r = func(c, arg, i, 0);
704 if (ret)
705 ret[i] = r;
706 }
707 return 0;
708 }
709
710 static int is_hwaccel_pix_fmt(enum AVPixelFormat pix_fmt)
711 {
712 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
713 return desc->flags & AV_PIX_FMT_FLAG_HWACCEL;
714 }
715
716 enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
717 {
718 while (*fmt != AV_PIX_FMT_NONE && is_hwaccel_pix_fmt(*fmt))
719 ++fmt;
720 return fmt[0];
721 }
722
723 static AVHWAccel *find_hwaccel(enum AVCodecID codec_id,
724 enum AVPixelFormat pix_fmt)
725 {
726 AVHWAccel *hwaccel = NULL;
727
728 while ((hwaccel = av_hwaccel_next(hwaccel)))
729 if (hwaccel->id == codec_id
730 && hwaccel->pix_fmt == pix_fmt)
731 return hwaccel;
732 return NULL;
733 }
734
735 static int setup_hwaccel(AVCodecContext *avctx,
736 const enum AVPixelFormat fmt,
737 const char *name)
738 {
739 AVHWAccel *hwa = find_hwaccel(avctx->codec_id, fmt);
740 int ret = 0;
741
742 if (!hwa) {
743 av_log(avctx, AV_LOG_ERROR,
744 "Could not find an AVHWAccel for the pixel format: %s",
745 name);
746 return AVERROR(ENOENT);
747 }
748
749 if (hwa->priv_data_size) {
750 avctx->internal->hwaccel_priv_data = av_mallocz(hwa->priv_data_size);
751 if (!avctx->internal->hwaccel_priv_data)
752 return AVERROR(ENOMEM);
753 }
754
755 if (hwa->init) {
756 ret = hwa->init(avctx);
757 if (ret < 0) {
758 av_freep(&avctx->internal->hwaccel_priv_data);
759 return ret;
760 }
761 }
762
763 avctx->hwaccel = hwa;
764
765 return 0;
766 }
767
768 int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
769 {
770 const AVPixFmtDescriptor *desc;
771 enum AVPixelFormat *choices;
772 enum AVPixelFormat ret;
773 unsigned n = 0;
774
775 while (fmt[n] != AV_PIX_FMT_NONE)
776 ++n;
777
778 av_assert0(n >= 1);
779 avctx->sw_pix_fmt = fmt[n - 1];
780 av_assert2(!is_hwaccel_pix_fmt(avctx->sw_pix_fmt));
781
782 choices = av_malloc_array(n + 1, sizeof(*choices));
783 if (!choices)
784 return AV_PIX_FMT_NONE;
785
786 memcpy(choices, fmt, (n + 1) * sizeof(*choices));
787
788 for (;;) {
789 if (avctx->hwaccel && avctx->hwaccel->uninit)
790 avctx->hwaccel->uninit(avctx);
791 av_freep(&avctx->internal->hwaccel_priv_data);
792 avctx->hwaccel = NULL;
793
794 ret = avctx->get_format(avctx, choices);
795
796 desc = av_pix_fmt_desc_get(ret);
797 if (!desc) {
798 ret = AV_PIX_FMT_NONE;
799 break;
800 }
801
802 if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
803 break;
804
805 if (!setup_hwaccel(avctx, ret, desc->name))
806 break;
807
808 /* Remove failed hwaccel from choices */
809 for (n = 0; choices[n] != ret; n++)
810 av_assert0(choices[n] != AV_PIX_FMT_NONE);
811
812 do
813 choices[n] = choices[n + 1];
814 while (choices[n++] != AV_PIX_FMT_NONE);
815 }
816
817 av_freep(&choices);
818 return ret;
819 }
820
821 int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
822 {
823 int ret = 0;
824 AVDictionary *tmp = NULL;
825
826 if (avcodec_is_open(avctx))
827 return 0;
828
829 if ((!codec && !avctx->codec)) {
830 av_log(avctx, AV_LOG_ERROR, "No codec provided to avcodec_open2().\n");
831 return AVERROR(EINVAL);
832 }
833 if ((codec && avctx->codec && codec != avctx->codec)) {
834 av_log(avctx, AV_LOG_ERROR, "This AVCodecContext was allocated for %s, "
835 "but %s passed to avcodec_open2().\n", avctx->codec->name, codec->name);
836 return AVERROR(EINVAL);
837 }
838 if (!codec)
839 codec = avctx->codec;
840
841 if (avctx->extradata_size < 0 || avctx->extradata_size >= FF_MAX_EXTRADATA_SIZE)
842 return AVERROR(EINVAL);
843
844 if (options)
845 av_dict_copy(&tmp, *options, 0);
846
847 /* If there is a user-supplied mutex locking routine, call it. */
848 if (!(codec->caps_internal & FF_CODEC_CAP_INIT_THREADSAFE)) {
849 if (lockmgr_cb) {
850 if ((*lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
851 return -1;
852 }
853
854 entangled_thread_counter++;
855 if (entangled_thread_counter != 1) {
856 av_log(avctx, AV_LOG_ERROR,
857 "Insufficient thread locking. At least %d threads are "
858 "calling avcodec_open2() at the same time right now.\n",
859 entangled_thread_counter);
860 ret = -1;
861 goto end;
862 }
863 }
864
865 avctx->internal = av_mallocz(sizeof(AVCodecInternal));
866 if (!avctx->internal) {
867 ret = AVERROR(ENOMEM);
868 goto end;
869 }
870
871 avctx->internal->pool = av_mallocz(sizeof(*avctx->internal->pool));
872 if (!avctx->internal->pool) {
873 ret = AVERROR(ENOMEM);
874 goto free_and_end;
875 }
876
877 avctx->internal->to_free = av_frame_alloc();
878 if (!avctx->internal->to_free) {
879 ret = AVERROR(ENOMEM);
880 goto free_and_end;
881 }
882
883 if (codec->priv_data_size > 0) {
884 if (!avctx->priv_data) {
885 avctx->priv_data = av_mallocz(codec->priv_data_size);
886 if (!avctx->priv_data) {
887 ret = AVERROR(ENOMEM);
888 goto end;
889 }
890 if (codec->priv_class) {
891 *(const AVClass **)avctx->priv_data = codec->priv_class;
892 av_opt_set_defaults(avctx->priv_data);
893 }
894 }
895 if (codec->priv_class && (ret = av_opt_set_dict(avctx->priv_data, &tmp)) < 0)
896 goto free_and_end;
897 } else {
898 avctx->priv_data = NULL;
899 }
900 if ((ret = av_opt_set_dict(avctx, &tmp)) < 0)
901 goto free_and_end;
902
903 if (avctx->coded_width && avctx->coded_height && !avctx->width && !avctx->height)
904 ret = ff_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
905 else if (avctx->width && avctx->height)
906 ret = ff_set_dimensions(avctx, avctx->width, avctx->height);
907 if (ret < 0)
908 goto free_and_end;
909
910 if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
911 && ( av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0
912 || av_image_check_size(avctx->width, avctx->height, 0, avctx) < 0)) {
913 av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n");
914 ff_set_dimensions(avctx, 0, 0);
915 }
916
917 if (avctx->width > 0 && avctx->height > 0) {
918 if (av_image_check_sar(avctx->width, avctx->height,
919 avctx->sample_aspect_ratio) < 0) {
920 av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
921 avctx->sample_aspect_ratio.num,
922 avctx->sample_aspect_ratio.den);
923 avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
924 }
925 }
926
927 /* if the decoder init function was already called previously,
928 * free the already allocated subtitle_header before overwriting it */
929 if (av_codec_is_decoder(codec))
930 av_freep(&avctx->subtitle_header);
931
932 if (avctx->channels > FF_SANE_NB_CHANNELS) {
933 ret = AVERROR(EINVAL);
934 goto free_and_end;
935 }
936
937 avctx->codec = codec;
938 if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
939 avctx->codec_id == AV_CODEC_ID_NONE) {
940 avctx->codec_type = codec->type;
941 avctx->codec_id = codec->id;
942 }
943 if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type
944 && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
945 av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
946 ret = AVERROR(EINVAL);
947 goto free_and_end;
948 }
949 avctx->frame_number = 0;
950
951 if ((avctx->codec->capabilities & AV_CODEC_CAP_EXPERIMENTAL) &&
952 avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
953 ret = AVERROR_EXPERIMENTAL;
954 goto free_and_end;
955 }
956
957 if (avctx->codec_type == AVMEDIA_TYPE_AUDIO &&
958 (!avctx->time_base.num || !avctx->time_base.den)) {
959 avctx->time_base.num = 1;
960 avctx->time_base.den = avctx->sample_rate;
961 }
962
963 if (HAVE_THREADS) {
964 ret = ff_thread_init(avctx);
965 if (ret < 0) {
966 goto free_and_end;
967 }
968 }
969 if (!HAVE_THREADS && !(codec->capabilities & AV_CODEC_CAP_AUTO_THREADS))
970 avctx->thread_count = 1;
971
972 if (av_codec_is_encoder(avctx->codec)) {
973 int i;
974 #if FF_API_CODED_FRAME
975 FF_DISABLE_DEPRECATION_WARNINGS
976 avctx->coded_frame = av_frame_alloc();
977 if (!avctx->coded_frame) {
978 ret = AVERROR(ENOMEM);
979 goto free_and_end;
980 }
981 FF_ENABLE_DEPRECATION_WARNINGS
982 #endif
983 if (avctx->codec->sample_fmts) {
984 for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++) {
985 if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
986 break;
987 if (avctx->channels == 1 &&
988 av_get_planar_sample_fmt(avctx->sample_fmt) ==
989 av_get_planar_sample_fmt(avctx->codec->sample_fmts[i])) {
990 avctx->sample_fmt = avctx->codec->sample_fmts[i];
991 break;
992 }
993 }
994 if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
995 av_log(avctx, AV_LOG_ERROR, "Specified sample_fmt is not supported.\n");
996 ret = AVERROR(EINVAL);
997 goto free_and_end;
998 }
999 }
1000 if (avctx->codec->pix_fmts) {
1001 for (i = 0; avctx->codec->pix_fmts[i] != AV_PIX_FMT_NONE; i++)
1002 if (avctx->pix_fmt == avctx->codec->pix_fmts[i])
1003 break;
1004 if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_NONE) {
1005 av_log(avctx, AV_LOG_ERROR, "Specified pix_fmt is not supported\n");
1006 ret = AVERROR(EINVAL);
1007 goto free_and_end;
1008 }
1009 if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ420P ||
1010 avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ422P ||
1011 avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ440P ||
1012 avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ444P)
1013 avctx->color_range = AVCOL_RANGE_JPEG;
1014 }
1015 if (avctx->codec->supported_samplerates) {
1016 for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)
1017 if (avctx->sample_rate == avctx->codec->supported_samplerates[i])
1018 break;
1019 if (avctx->codec->supported_samplerates[i] == 0) {
1020 av_log(avctx, AV_LOG_ERROR, "Specified sample_rate is not supported\n");
1021 ret = AVERROR(EINVAL);
1022 goto free_and_end;
1023 }
1024 }
1025 if (avctx->codec->channel_layouts) {
1026 if (!avctx->channel_layout) {
1027 av_log(avctx, AV_LOG_WARNING, "channel_layout not specified\n");
1028 } else {
1029 for (i = 0; avctx->codec->channel_layouts[i] != 0; i++)
1030 if (avctx->channel_layout == avctx->codec->channel_layouts[i])
1031 break;
1032 if (avctx->codec->channel_layouts[i] == 0) {
1033 av_log(avctx, AV_LOG_ERROR, "Specified channel_layout is not supported\n");
1034 ret = AVERROR(EINVAL);
1035 goto free_and_end;
1036 }
1037 }
1038 }
1039 if (avctx->channel_layout && avctx->channels) {
1040 if (av_get_channel_layout_nb_channels(avctx->channel_layout) != avctx->channels) {
1041 av_log(avctx, AV_LOG_ERROR, "channel layout does not match number of channels\n");
1042 ret = AVERROR(EINVAL);
1043 goto free_and_end;
1044 }
1045 } else if (avctx->channel_layout) {
1046 avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
1047 }
1048
1049 if (!avctx->rc_initial_buffer_occupancy)
1050 avctx->rc_initial_buffer_occupancy = avctx->rc_buffer_size * 3 / 4;
1051 }
1052
1053 if (avctx->codec->init && !(avctx->active_thread_type & FF_THREAD_FRAME)) {
1054 ret = avctx->codec->init(avctx);
1055 if (ret < 0) {
1056 goto free_and_end;
1057 }
1058 }
1059
1060 #if FF_API_AUDIOENC_DELAY
1061 if (av_codec_is_encoder(avctx->codec))
1062 avctx->delay = avctx->initial_padding;
1063 #endif
1064
1065 if (av_codec_is_decoder(avctx->codec)) {
1066 /* validate channel layout from the decoder */
1067 if (avctx->channel_layout) {
1068 int channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
1069 if (!avctx->channels)
1070 avctx->channels = channels;
1071 else if (channels != avctx->channels) {
1072 av_log(avctx, AV_LOG_WARNING,
1073 "channel layout does not match number of channels\n");
1074 avctx->channel_layout = 0;
1075 }
1076 }
1077 if (avctx->channels && avctx->channels < 0 ||
1078 avctx->channels > FF_SANE_NB_CHANNELS) {
1079 ret = AVERROR(EINVAL);
1080 goto free_and_end;
1081 }
1082
1083 #if FF_API_AVCTX_TIMEBASE
1084 if (avctx->framerate.num > 0 && avctx->framerate.den > 0)
1085 avctx->time_base = av_inv_q(avctx->framerate);
1086 #endif
1087 }
1088 end:
1089 if (!(codec->caps_internal & FF_CODEC_CAP_INIT_THREADSAFE)) {
1090 entangled_thread_counter--;
1091
1092 /* Release any user-supplied mutex. */
1093 if (lockmgr_cb) {
1094 (*lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
1095 }
1096 }
1097
1098 if (options) {
1099 av_dict_free(options);
1100 *options = tmp;
1101 }
1102
1103 return ret;
1104 free_and_end:
1105 if (avctx->codec &&
1106 (avctx->codec->caps_internal & FF_CODEC_CAP_INIT_CLEANUP))
1107 avctx->codec->close(avctx);
1108
1109 if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)
1110 av_opt_free(avctx->priv_data);
1111 av_opt_free(avctx);
1112
1113 #if FF_API_CODED_FRAME
1114 FF_DISABLE_DEPRECATION_WARNINGS
1115 av_frame_free(&avctx->coded_frame);
1116 FF_ENABLE_DEPRECATION_WARNINGS
1117 #endif
1118
1119 av_dict_free(&tmp);
1120 av_freep(&avctx->priv_data);
1121 if (avctx->internal) {
1122 av_frame_free(&avctx->internal->to_free);
1123 av_freep(&avctx->internal->pool);
1124 }
1125 av_freep(&avctx->internal);
1126 avctx->codec = NULL;
1127 goto end;
1128 }
1129
1130 int ff_alloc_packet(AVPacket *avpkt, int size)
1131 {
1132 if (size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
1133 return AVERROR(EINVAL);
1134
1135 if (avpkt->data) {
1136 AVBufferRef *buf = avpkt->buf;
1137
1138 if (avpkt->size < size)
1139 return AVERROR(EINVAL);
1140
1141 av_init_packet(avpkt);
1142 avpkt->buf = buf;
1143 avpkt->size = size;
1144 return 0;
1145 } else {
1146 return av_new_packet(avpkt, size);
1147 }
1148 }
1149
1150 /**
1151 * Pad last frame with silence.
1152 */
1153 static int pad_last_frame(AVCodecContext *s, AVFrame **dst, const AVFrame *src)
1154 {
1155 AVFrame *frame = NULL;
1156 int ret;
1157
1158 if (!(frame = av_frame_alloc()))
1159 return AVERROR(ENOMEM);
1160
1161 frame->format = src->format;
1162 frame->channel_layout = src->channel_layout;
1163 frame->nb_samples = s->frame_size;
1164 ret = av_frame_get_buffer(frame, 32);
1165 if (ret < 0)
1166 goto fail;
1167
1168 ret = av_frame_copy_props(frame, src);
1169 if (ret < 0)
1170 goto fail;
1171
1172 if ((ret = av_samples_copy(frame->extended_data, src->extended_data, 0, 0,
1173 src->nb_samples, s->channels, s->sample_fmt)) < 0)
1174 goto fail;
1175 if ((ret = av_samples_set_silence(frame->extended_data, src->nb_samples,
1176 frame->nb_samples - src->nb_samples,
1177 s->channels, s->sample_fmt)) < 0)
1178 goto fail;
1179
1180 *dst = frame;
1181
1182 return 0;
1183
1184 fail:
1185 av_frame_free(&frame);
1186 return ret;
1187 }
1188
1189 int attribute_align_arg avcodec_encode_audio2(AVCodecContext *avctx,
1190 AVPacket *avpkt,
1191 const AVFrame *frame,
1192 int *got_packet_ptr)
1193 {
1194 AVFrame tmp;
1195 AVFrame *padded_frame = NULL;
1196 int ret;
1197 int user_packet = !!avpkt->data;
1198
1199 *got_packet_ptr = 0;
1200
1201 if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY) && !frame) {
1202 av_free_packet(avpkt);
1203 av_init_packet(avpkt);
1204 return 0;
1205 }
1206
1207 /* ensure that extended_data is properly set */
1208 if (frame && !frame->extended_data) {
1209 if (av_sample_fmt_is_planar(avctx->sample_fmt) &&
1210 avctx->channels > AV_NUM_DATA_POINTERS) {
1211 av_log(avctx, AV_LOG_ERROR, "Encoding to a planar sample format, "
1212 "with more than %d channels, but extended_data is not set.\n",
1213 AV_NUM_DATA_POINTERS);
1214 return AVERROR(EINVAL);
1215 }
1216 av_log(avctx, AV_LOG_WARNING, "extended_data is not set.\n");
1217
1218 tmp = *frame;
1219 tmp.extended_data = tmp.data;
1220 frame = &tmp;
1221 }
1222
1223 /* extract audio service type metadata */
1224 if (frame) {
1225 AVFrameSideData *sd = av_frame_get_side_data(frame, AV_FRAME_DATA_AUDIO_SERVICE_TYPE);
1226 if (sd && sd->size >= sizeof(enum AVAudioServiceType))
1227 avctx->audio_service_type = *(enum AVAudioServiceType*)sd->data;
1228 }
1229
1230 /* check for valid frame size */
1231 if (frame) {
1232 if (avctx->codec->capabilities & AV_CODEC_CAP_SMALL_LAST_FRAME) {
1233 if (frame->nb_samples > avctx->frame_size)
1234 return AVERROR(EINVAL);
1235 } else if (!(avctx->codec->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE)) {
1236 if (frame->nb_samples < avctx->frame_size &&
1237 !avctx->internal->last_audio_frame) {
1238 ret = pad_last_frame(avctx, &padded_frame, frame);
1239 if (ret < 0)
1240 return ret;
1241
1242 frame = padded_frame;
1243 avctx->internal->last_audio_frame = 1;
1244 }
1245
1246 if (frame->nb_samples != avctx->frame_size) {
1247 ret = AVERROR(EINVAL);
1248 goto end;
1249 }
1250 }
1251 }
1252
1253 ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
1254 if (!ret) {
1255 if (*got_packet_ptr) {
1256 if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY)) {
1257 if (avpkt->pts == AV_NOPTS_VALUE)
1258 avpkt->pts = frame->pts;
1259 if (!avpkt->duration)
1260 avpkt->duration = ff_samples_to_time_base(avctx,
1261 frame->nb_samples);
1262 }
1263 avpkt->dts = avpkt->pts;
1264 } else {
1265 avpkt->size = 0;
1266 }
1267
1268 if (!user_packet && avpkt->size) {
1269 ret = av_buffer_realloc(&avpkt->buf, avpkt->size);
1270 if (ret >= 0)
1271 avpkt->data = avpkt->buf->data;
1272 }
1273
1274 avctx->frame_number++;
1275 }
1276
1277 if (ret < 0 || !*got_packet_ptr) {
1278 av_free_packet(avpkt);
1279 av_init_packet(avpkt);
1280 goto end;
1281 }
1282
1283 /* NOTE: if we add any audio encoders which output non-keyframe packets,
1284 * this needs to be moved to the encoders, but for now we can do it
1285 * here to simplify things */
1286 avpkt->flags |= AV_PKT_FLAG_KEY;
1287
1288 end:
1289 av_frame_free(&padded_frame);
1290
1291 #if FF_API_AUDIOENC_DELAY
1292 avctx->delay = avctx->initial_padding;
1293 #endif
1294
1295 return ret;
1296 }
1297
1298 int attribute_align_arg avcodec_encode_video2(AVCodecContext *avctx,
1299 AVPacket *avpkt,
1300 const AVFrame *frame,
1301 int *got_packet_ptr)
1302 {
1303 int ret;
1304 int user_packet = !!avpkt->data;
1305
1306 *got_packet_ptr = 0;
1307
1308 if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY) && !frame) {
1309 av_free_packet(avpkt);
1310 av_init_packet(avpkt);
1311 avpkt->size = 0;
1312 return 0;
1313 }
1314
1315 if (av_image_check_size(avctx->width, avctx->height, 0, avctx))
1316 return AVERROR(EINVAL);
1317
1318 av_assert0(avctx->codec->encode2);
1319
1320 ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
1321 if (!ret) {
1322 if (!*got_packet_ptr)
1323 avpkt->size = 0;
1324 else if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY))
1325 avpkt->pts = avpkt->dts = frame->pts;
1326
1327 if (!user_packet && avpkt->size) {
1328 ret = av_buffer_realloc(&avpkt->buf, avpkt->size);
1329 if (ret >= 0)
1330 avpkt->data = avpkt->buf->data;
1331 }
1332
1333 avctx->frame_number++;
1334 }
1335
1336 if (ret < 0 || !*got_packet_ptr)
1337 av_free_packet(avpkt);
1338
1339 emms_c();
1340 return ret;
1341 }
1342
1343 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1344 const AVSubtitle *sub)
1345 {
1346 int ret;
1347 if (sub->start_display_time) {
1348 av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
1349 return -1;
1350 }
1351 if (sub->num_rects == 0 || !sub->rects)
1352 return -1;
1353 ret = avctx->codec->encode_sub(avctx, buf, buf_size, sub);
1354 avctx->frame_number++;
1355 return ret;
1356 }
1357
1358 static int apply_param_change(AVCodecContext *avctx, AVPacket *avpkt)
1359 {
1360 int size = 0, ret;
1361 const uint8_t *data;
1362 uint32_t flags;
1363
1364 data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size);
1365 if (!data)
1366 return 0;
1367
1368 if (!(avctx->codec->capabilities & AV_CODEC_CAP_PARAM_CHANGE)) {
1369 av_log(avctx, AV_LOG_ERROR, "This decoder does not support parameter "
1370 "changes, but PARAM_CHANGE side data was sent to it.\n");
1371 return AVERROR(EINVAL);
1372 }
1373
1374 if (size < 4)
1375 goto fail;
1376
1377 flags = bytestream_get_le32(&data);
1378 size -= 4;
1379
1380 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) {
1381 if (size < 4)
1382 goto fail;
1383 avctx->channels = bytestream_get_le32(&data);
1384 size -= 4;
1385 }
1386 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) {
1387 if (size < 8)
1388 goto fail;
1389 avctx->channel_layout = bytestream_get_le64(&data);
1390 size -= 8;
1391 }
1392 if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) {
1393 if (size < 4)
1394 goto fail;
1395 avctx->sample_rate = bytestream_get_le32(&data);
1396 size -= 4;
1397 }
1398 if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) {
1399 if (size < 8)
1400 goto fail;
1401 avctx->width = bytestream_get_le32(&data);
1402 avctx->height = bytestream_get_le32(&data);
1403 size -= 8;
1404 ret = ff_set_dimensions(avctx, avctx->width, avctx->height);
1405 if (ret < 0)
1406 return ret;
1407 }
1408
1409 return 0;
1410 fail:
1411 av_log(avctx, AV_LOG_ERROR, "PARAM_CHANGE side data too small.\n");
1412 return AVERROR_INVALIDDATA;
1413 }
1414
1415 static int unrefcount_frame(AVCodecInternal *avci, AVFrame *frame)
1416 {
1417 int ret;
1418
1419 /* move the original frame to our backup */
1420 av_frame_unref(avci->to_free);
1421 av_frame_move_ref(avci->to_free, frame);
1422
1423 /* now copy everything except the AVBufferRefs back
1424 * note that we make a COPY of the side data, so calling av_frame_free() on
1425 * the caller's frame will work properly */
1426 ret = av_frame_copy_props(frame, avci->to_free);
1427 if (ret < 0)
1428 return ret;
1429
1430 memcpy(frame->data, avci->to_free->data, sizeof(frame->data));
1431 memcpy(frame->linesize, avci->to_free->linesize, sizeof(frame->linesize));
1432 if (avci->to_free->extended_data != avci->to_free->data) {
1433 int planes = av_get_channel_layout_nb_channels(avci->to_free->channel_layout);
1434 int size = planes * sizeof(*frame->extended_data);
1435
1436 if (!size) {
1437 av_frame_unref(frame);
1438 return AVERROR_BUG;
1439 }
1440
1441 frame->extended_data = av_malloc(size);
1442 if (!frame->extended_data) {
1443 av_frame_unref(frame);
1444 return AVERROR(ENOMEM);
1445 }
1446 memcpy(frame->extended_data, avci->to_free->extended_data,
1447 size);
1448 } else
1449 frame->extended_data = frame->data;
1450
1451 frame->format = avci->to_free->format;
1452 frame->width = avci->to_free->width;
1453 frame->height = avci->to_free->height;
1454 frame->channel_layout = avci->to_free->channel_layout;
1455 frame->nb_samples = avci->to_free->nb_samples;
1456
1457 return 0;
1458 }
1459
1460 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
1461 int *got_picture_ptr,
1462 AVPacket *avpkt)
1463 {
1464 AVCodecInternal *avci = avctx->internal;
1465 int ret;
1466
1467 *got_picture_ptr = 0;
1468 if ((avctx->coded_width || avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
1469 return -1;
1470
1471 avctx->internal->pkt = avpkt;
1472 ret = apply_param_change(avctx, avpkt);
1473 if (ret < 0) {
1474 av_log(avctx, AV_LOG_ERROR, "Error applying parameter changes.\n");
1475 if (avctx->err_recognition & AV_EF_EXPLODE)
1476 return ret;
1477 }
1478
1479 av_frame_unref(picture);
1480
1481 if ((avctx->codec->capabilities & AV_CODEC_CAP_DELAY) || avpkt->size ||
1482 (avctx->active_thread_type & FF_THREAD_FRAME)) {
1483 if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
1484 ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr,
1485 avpkt);
1486 else {
1487 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
1488 avpkt);
1489 if (!(avctx->codec->caps_internal & FF_CODEC_CAP_SETS_PKT_DTS))
1490 picture->pkt_dts = avpkt->dts;
1491 /* get_buffer is supposed to set frame parameters */
1492 if (!(avctx->codec->capabilities & AV_CODEC_CAP_DR1)) {
1493 picture->sample_aspect_ratio = avctx->sample_aspect_ratio;
1494 picture->width = avctx->width;
1495 picture->height = avctx->height;
1496 picture->format = avctx->pix_fmt;
1497 }
1498 }
1499
1500 emms_c(); //needed to avoid an emms_c() call before every return;
1501
1502 if (*got_picture_ptr) {
1503 if (!avctx->refcounted_frames) {
1504 int err = unrefcount_frame(avci, picture);
1505 if (err < 0)
1506 return err;
1507 }
1508
1509 avctx->frame_number++;
1510 } else
1511 av_frame_unref(picture);
1512 } else
1513 ret = 0;
1514
1515 #if FF_API_AVCTX_TIMEBASE
1516 if (avctx->framerate.num > 0 && avctx->framerate.den > 0)
1517 avctx->time_base = av_inv_q(avctx->framerate);
1518 #endif
1519
1520 return ret;
1521 }
1522
1523 int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
1524 AVFrame *frame,
1525 int *got_frame_ptr,
1526 AVPacket *avpkt)
1527 {
1528 AVCodecInternal *avci = avctx->internal;
1529 int ret = 0;
1530
1531 *got_frame_ptr = 0;
1532
1533 avctx->internal->pkt = avpkt;
1534
1535 if (!avpkt->data && avpkt->size) {
1536 av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n");
1537 return AVERROR(EINVAL);
1538 }
1539
1540 ret = apply_param_change(avctx, avpkt);
1541 if (ret < 0) {
1542 av_log(avctx, AV_LOG_ERROR, "Error applying parameter changes.\n");
1543 if (avctx->err_recognition & AV_EF_EXPLODE)
1544 return ret;
1545 }
1546
1547 av_frame_unref(frame);
1548
1549 if ((avctx->codec->capabilities & AV_CODEC_CAP_DELAY) || avpkt->size) {
1550 ret = avctx->codec->decode(avctx, frame, got_frame_ptr, avpkt);
1551 if (ret >= 0 && *got_frame_ptr) {
1552 avctx->frame_number++;
1553 frame->pkt_dts = avpkt->dts;
1554 if (frame->format == AV_SAMPLE_FMT_NONE)
1555 frame->format = avctx->sample_fmt;
1556
1557 if (!avctx->refcounted_frames) {
1558 int err = unrefcount_frame(avci, frame);
1559 if (err < 0)
1560 return err;
1561 }
1562 } else
1563 av_frame_unref(frame);
1564 }
1565
1566
1567 return ret;
1568 }
1569
1570 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
1571 int *got_sub_ptr,
1572 AVPacket *avpkt)
1573 {
1574 int ret;
1575
1576 avctx->internal->pkt = avpkt;
1577 *got_sub_ptr = 0;
1578 ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
1579 if (*got_sub_ptr)
1580 avctx->frame_number++;
1581 return ret;
1582 }
1583
1584 void avsubtitle_free(AVSubtitle *sub)
1585 {
1586 int i;
1587
1588 for (i = 0; i < sub->num_rects; i++) {
1589 av_freep(&sub->rects[i]->pict.data[0]);
1590 av_freep(&sub->rects[i]->pict.data[1]);
1591 av_freep(&sub->rects[i]->pict.data[2]);
1592 av_freep(&sub->rects[i]->pict.data[3]);
1593 av_freep(&sub->rects[i]->text);
1594 av_freep(&sub->rects[i]->ass);
1595 av_freep(&sub->rects[i]);
1596 }
1597
1598 av_freep(&sub->rects);
1599
1600 memset(sub, 0, sizeof(AVSubtitle));
1601 }
1602
1603 av_cold int avcodec_close(AVCodecContext *avctx)
1604 {
1605 if (avcodec_is_open(avctx)) {
1606 FramePool *pool = avctx->internal->pool;
1607 int i;
1608 if (HAVE_THREADS && avctx->internal->thread_ctx)
1609 ff_thread_free(avctx);
1610 if (avctx->codec && avctx->codec->close)
1611 avctx->codec->close(avctx);
1612 av_frame_free(&avctx->internal->to_free);
1613 for (i = 0; i < FF_ARRAY_ELEMS(pool->pools); i++)
1614 av_buffer_pool_uninit(&pool->pools[i]);
1615 av_freep(&avctx->internal->pool);
1616
1617 if (avctx->hwaccel && avctx->hwaccel->uninit)
1618 avctx->hwaccel->uninit(avctx);
1619 av_freep(&avctx->internal->hwaccel_priv_data);
1620
1621 av_freep(&avctx->internal);
1622 }
1623
1624 if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)
1625 av_opt_free(avctx->priv_data);
1626 av_opt_free(avctx);
1627 av_freep(&avctx->priv_data);
1628 if (av_codec_is_encoder(avctx->codec)) {
1629 av_freep(&avctx->extradata);
1630 #if FF_API_CODED_FRAME
1631 FF_DISABLE_DEPRECATION_WARNINGS
1632 av_frame_free(&avctx->coded_frame);
1633 FF_ENABLE_DEPRECATION_WARNINGS
1634 #endif
1635 }
1636 avctx->codec = NULL;
1637 avctx->active_thread_type = 0;
1638
1639 return 0;
1640 }
1641
1642 static AVCodec *find_encdec(enum AVCodecID id, int encoder)
1643 {
1644 AVCodec *p, *experimental = NULL;
1645 p = first_avcodec;
1646 while (p) {
1647 if ((encoder ? av_codec_is_encoder(p) : av_codec_is_decoder(p)) &&
1648 p->id == id) {
1649 if (p->capabilities & AV_CODEC_CAP_EXPERIMENTAL && !experimental) {
1650 experimental = p;
1651 } else
1652 return p;
1653 }
1654 p = p->next;
1655 }
1656 return experimental;
1657 }
1658
1659 AVCodec *avcodec_find_encoder(enum AVCodecID id)
1660 {
1661 return find_encdec(id, 1);
1662 }
1663
1664 AVCodec *avcodec_find_encoder_by_name(const char *name)
1665 {
1666 AVCodec *p;
1667 if (!name)
1668 return NULL;
1669 p = first_avcodec;
1670 while (p) {
1671 if (av_codec_is_encoder(p) && strcmp(name, p->name) == 0)
1672 return p;
1673 p = p->next;
1674 }
1675 return NULL;
1676 }
1677
1678 AVCodec *avcodec_find_decoder(enum AVCodecID id)
1679 {
1680 return find_encdec(id, 0);
1681 }
1682
1683 AVCodec *avcodec_find_decoder_by_name(const char *name)
1684 {
1685 AVCodec *p;
1686 if (!name)
1687 return NULL;
1688 p = first_avcodec;
1689 while (p) {
1690 if (av_codec_is_decoder(p) && strcmp(name, p->name) == 0)
1691 return p;
1692 p = p->next;
1693 }
1694 return NULL;
1695 }
1696
1697 static int get_bit_rate(AVCodecContext *ctx)
1698 {
1699 int bit_rate;
1700 int bits_per_sample;
1701
1702 switch (ctx->codec_type) {
1703 case AVMEDIA_TYPE_VIDEO:
1704 case AVMEDIA_TYPE_DATA:
1705 case AVMEDIA_TYPE_SUBTITLE:
1706 case AVMEDIA_TYPE_ATTACHMENT:
1707 bit_rate = ctx->bit_rate;
1708 break;
1709 case AVMEDIA_TYPE_AUDIO:
1710 bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
1711 bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
1712 break;
1713 default:
1714 bit_rate = 0;
1715 break;
1716 }
1717 return bit_rate;
1718 }
1719
1720 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
1721 {
1722 int i, len, ret = 0;
1723
1724 #define TAG_PRINT(x) \
1725 (((x) >= '0' && (x) <= '9') || \
1726 ((x) >= 'a' && (x) <= 'z') || ((x) >= 'A' && (x) <= 'Z') || \
1727 ((x) == '.' || (x) == ' '))
1728
1729 for (i = 0; i < 4; i++) {
1730 len = snprintf(buf, buf_size,
1731 TAG_PRINT(codec_tag & 0xFF) ? "%c" : "[%d]", codec_tag & 0xFF);
1732 buf += len;
1733 buf_size = buf_size > len ? buf_size - len : 0;
1734 ret += len;
1735 codec_tag >>= 8;
1736 }
1737 return ret;
1738 }
1739
1740 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
1741 {
1742 const char *codec_name;
1743 const char *profile = NULL;
1744 const AVCodec *p;
1745 char buf1[32];
1746 int bitrate;
1747 int new_line = 0;
1748 AVRational display_aspect_ratio;
1749
1750 if (enc->codec)
1751 p = enc->codec;
1752 else if (encode)
1753 p = avcodec_find_encoder(enc->codec_id);
1754 else
1755 p = avcodec_find_decoder(enc->codec_id);
1756
1757 if (p) {
1758 codec_name = p->name;
1759 profile = av_get_profile_name(p, enc->profile);
1760 } else if (enc->codec_id == AV_CODEC_ID_MPEG2TS) {
1761 /* fake mpeg2 transport stream codec (currently not
1762 * registered) */
1763 codec_name = "mpeg2ts";
1764 } else {
1765 /* output avi tags */
1766 char tag_buf[32];
1767 av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
1768 snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
1769 codec_name = buf1;
1770 }
1771
1772 switch (enc->codec_type) {
1773 case AVMEDIA_TYPE_VIDEO:
1774 snprintf(buf, buf_size,
1775 "Video: %s%s",
1776 codec_name, enc->mb_decision ? " (hq)" : "");
1777 if (profile)
1778 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1779 " (%s)", profile);
1780 if (enc->codec_tag) {
1781 char tag_buf[32];
1782 av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
1783 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1784 " [%s / 0x%04X]", tag_buf, enc->codec_tag);
1785 }
1786
1787 av_strlcat(buf, "\n ", buf_size);
1788 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1789 "%s", enc->pix_fmt == AV_PIX_FMT_NONE ? "none" :
1790 av_get_pix_fmt_name(enc->pix_fmt));
1791
1792 if (enc->color_range != AVCOL_RANGE_UNSPECIFIED)
1793 snprintf(buf + strlen(buf), buf_size - strlen(buf), ", %s",
1794 av_color_range_name(enc->color_range));
1795 if (enc->colorspace != AVCOL_SPC_UNSPECIFIED ||
1796 enc->color_primaries != AVCOL_PRI_UNSPECIFIED ||
1797 enc->color_trc != AVCOL_TRC_UNSPECIFIED) {
1798 new_line = 1;
1799 snprintf(buf + strlen(buf), buf_size - strlen(buf), ", %s/%s/%s",
1800 av_color_space_name(enc->colorspace),
1801 av_color_primaries_name(enc->color_primaries),
1802 av_color_transfer_name(enc->color_trc));
1803 }
1804 if (av_log_get_level() >= AV_LOG_DEBUG &&
1805 enc->chroma_sample_location != AVCHROMA_LOC_UNSPECIFIED)
1806 snprintf(buf + strlen(buf), buf_size - strlen(buf), ", %s",
1807 av_chroma_location_name(enc->chroma_sample_location));
1808
1809 if (enc->width) {
1810 av_strlcat(buf, new_line ? "\n " : ", ", buf_size);
1811
1812 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1813 "%dx%d",
1814 enc->width, enc->height);
1815
1816 if (av_log_get_level() >= AV_LOG_VERBOSE &&
1817 (enc->width != enc->coded_width ||
1818 enc->height != enc->coded_height))
1819 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1820 " (%dx%d)", enc->coded_width, enc->coded_height);
1821
1822 if (enc->sample_aspect_ratio.num) {
1823 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1824 enc->width * enc->sample_aspect_ratio.num,
1825 enc->height * enc->sample_aspect_ratio.den,
1826 1024 * 1024);
1827 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1828 " [PAR %d:%d DAR %d:%d]",
1829 enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
1830 display_aspect_ratio.num, display_aspect_ratio.den);
1831 }
1832 if (av_log_get_level() >= AV_LOG_DEBUG) {
1833 int g = av_gcd(enc->time_base.num, enc->time_base.den);
1834 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1835 ", %d/%d",
1836 enc->time_base.num / g, enc->time_base.den / g);
1837 }
1838 }
1839 if (encode) {
1840 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1841 ", q=%d-%d", enc->qmin, enc->qmax);
1842 }
1843 break;
1844 case AVMEDIA_TYPE_AUDIO:
1845 snprintf(buf, buf_size,
1846 "Audio: %s",
1847 codec_name);
1848 if (profile)
1849 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1850 " (%s)", profile);
1851 if (enc->codec_tag) {
1852 char tag_buf[32];
1853 av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
1854 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1855 " [%s / 0x%04X]", tag_buf, enc->codec_tag);
1856 }
1857
1858 av_strlcat(buf, "\n ", buf_size);
1859 if (enc->sample_rate) {
1860 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1861 "%d Hz, ", enc->sample_rate);
1862 }
1863 av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
1864 if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {
1865 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1866 ", %s", av_get_sample_fmt_name(enc->sample_fmt));
1867 }
1868 break;
1869 case AVMEDIA_TYPE_DATA:
1870 snprintf(buf, buf_size, "Data: %s", codec_name);
1871 break;
1872 case AVMEDIA_TYPE_SUBTITLE:
1873 snprintf(buf, buf_size, "Subtitle: %s", codec_name);
1874 break;
1875 case AVMEDIA_TYPE_ATTACHMENT:
1876 snprintf(buf, buf_size, "Attachment: %s", codec_name);
1877 break;
1878 default:
1879 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
1880 return;
1881 }
1882 if (encode) {
1883 if (enc->flags & AV_CODEC_FLAG_PASS1)
1884 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1885 ", pass 1");
1886 if (enc->flags & AV_CODEC_FLAG_PASS2)
1887 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1888 ", pass 2");
1889 }
1890 bitrate = get_bit_rate(enc);
1891 if (bitrate != 0) {
1892 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1893 ", %d kb/s", bitrate / 1000);
1894 }
1895 }
1896
1897 const char *av_get_profile_name(const AVCodec *codec, int profile)
1898 {
1899 const AVProfile *p;
1900 if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)
1901 return NULL;
1902
1903 for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
1904 if (p->profile == profile)
1905 return p->name;
1906
1907 return NULL;
1908 }
1909
1910 unsigned avcodec_version(void)
1911 {
1912 return LIBAVCODEC_VERSION_INT;
1913 }
1914
1915 const char *avcodec_configuration(void)
1916 {
1917 return LIBAV_CONFIGURATION;
1918 }
1919
1920 const char *avcodec_license(void)
1921 {
1922 #define LICENSE_PREFIX "libavcodec license: "
1923 return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
1924 }
1925
1926 void avcodec_flush_buffers(AVCodecContext *avctx)
1927 {
1928 if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
1929 ff_thread_flush(avctx);
1930 else if (avctx->codec->flush)
1931 avctx->codec->flush(avctx);
1932
1933 if (!avctx->refcounted_frames)
1934 av_frame_unref(avctx->internal->to_free);
1935 }
1936
1937 int av_get_exact_bits_per_sample(enum AVCodecID codec_id)
1938 {
1939 switch (codec_id) {
1940 case AV_CODEC_ID_ADPCM_CT:
1941 case AV_CODEC_ID_ADPCM_IMA_APC:
1942 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
1943 case AV_CODEC_ID_ADPCM_IMA_WS:
1944 case AV_CODEC_ID_ADPCM_G722:
1945 case AV_CODEC_ID_ADPCM_YAMAHA:
1946 return 4;
1947 case AV_CODEC_ID_PCM_ALAW:
1948 case AV_CODEC_ID_PCM_MULAW:
1949 case AV_CODEC_ID_PCM_S8:
1950 case AV_CODEC_ID_PCM_U8:
1951 case AV_CODEC_ID_PCM_ZORK:
1952 return 8;
1953 case AV_CODEC_ID_PCM_S16BE:
1954 case AV_CODEC_ID_PCM_S16BE_PLANAR:
1955 case AV_CODEC_ID_PCM_S16LE:
1956 case AV_CODEC_ID_PCM_S16LE_PLANAR:
1957 case AV_CODEC_ID_PCM_U16BE:
1958 case AV_CODEC_ID_PCM_U16LE:
1959 return 16;
1960 case AV_CODEC_ID_PCM_S24DAUD:
1961 case AV_CODEC_ID_PCM_S24BE:
1962 case AV_CODEC_ID_PCM_S24LE:
1963 case AV_CODEC_ID_PCM_S24LE_PLANAR:
1964 case AV_CODEC_ID_PCM_U24BE:
1965 case AV_CODEC_ID_PCM_U24LE:
1966 return 24;
1967 case AV_CODEC_ID_PCM_S32BE:
1968 case AV_CODEC_ID_PCM_S32LE:
1969 case AV_CODEC_ID_PCM_S32LE_PLANAR:
1970 case AV_CODEC_ID_PCM_U32BE:
1971 case AV_CODEC_ID_PCM_U32LE:
1972 case AV_CODEC_ID_PCM_F32BE:
1973 case AV_CODEC_ID_PCM_F32LE:
1974 return 32;
1975 case AV_CODEC_ID_PCM_F64BE:
1976 case AV_CODEC_ID_PCM_F64LE:
1977 return 64;
1978 default:
1979 return 0;
1980 }
1981 }
1982
1983 int av_get_bits_per_sample(enum AVCodecID codec_id)
1984 {
1985 switch (codec_id) {
1986 case AV_CODEC_ID_ADPCM_SBPRO_2:
1987 return 2;
1988 case AV_CODEC_ID_ADPCM_SBPRO_3:
1989 return 3;
1990 case AV_CODEC_ID_ADPCM_SBPRO_4:
1991 case AV_CODEC_ID_ADPCM_IMA_WAV:
1992 case AV_CODEC_ID_ADPCM_IMA_QT:
1993 case AV_CODEC_ID_ADPCM_SWF:
1994 case AV_CODEC_ID_ADPCM_MS:
1995 return 4;
1996 default:
1997 return av_get_exact_bits_per_sample(codec_id);
1998 }
1999 }
2000
2001 int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
2002 {
2003 int id, sr, ch, ba, tag, bps;
2004
2005 id = avctx->codec_id;
2006 sr = avctx->sample_rate;
2007 ch = avctx->channels;
2008 ba = avctx->block_align;
2009 tag = avctx->codec_tag;
2010 bps = av_get_exact_bits_per_sample(avctx->codec_id);
2011
2012 /* codecs with an exact constant bits per sample */
2013 if (bps > 0 && ch > 0 && frame_bytes > 0)
2014 return (frame_bytes * 8) / (bps * ch);
2015 bps = avctx->bits_per_coded_sample;
2016
2017 /* codecs with a fixed packet duration */
2018 switch (id) {
2019 case AV_CODEC_ID_ADPCM_ADX: return 32;
2020 case AV_CODEC_ID_ADPCM_IMA_QT: return 64;
2021 case AV_CODEC_ID_ADPCM_EA_XAS: return 128;
2022 case AV_CODEC_ID_AMR_NB:
2023 case AV_CODEC_ID_GSM:
2024 case AV_CODEC_ID_QCELP:
2025 case AV_CODEC_ID_RA_144:
2026 case AV_CODEC_ID_RA_288: return 160;
2027 case AV_CODEC_ID_IMC: return 256;
2028 case AV_CODEC_ID_AMR_WB:
2029 case AV_CODEC_ID_GSM_MS: return 320;
2030 case AV_CODEC_ID_MP1: return 384;
2031 case AV_CODEC_ID_ATRAC1: return 512;
2032 case AV_CODEC_ID_ATRAC3: return 1024;
2033 case AV_CODEC_ID_MP2:
2034 case AV_CODEC_ID_MUSEPACK7: return 1152;
2035 case AV_CODEC_ID_AC3: return 1536;
2036 }
2037
2038 if (sr > 0) {
2039 /* calc from sample rate */
2040 if (id == AV_CODEC_ID_TTA)
2041 return 256 * sr / 245;
2042
2043 if (ch > 0) {
2044 /* calc from sample rate and channels */
2045 if (id == AV_CODEC_ID_BINKAUDIO_DCT)
2046 return (480 << (sr / 22050)) / ch;
2047 }
2048 }
2049
2050 if (ba > 0) {
2051 /* calc from block_align */
2052 if (id == AV_CODEC_ID_SIPR) {
2053 switch (ba) {
2054 case 20: return 160;
2055 case 19: return 144;
2056 case 29: return 288;
2057 case 37: return 480;
2058 }
2059 } else if (id == AV_CODEC_ID_ILBC) {
2060 switch (ba) {
2061 case 38: return 160;
2062 case 50: return 240;
2063 }
2064 }
2065 }
2066
2067 if (frame_bytes > 0) {
2068 /* calc from frame_bytes only */
2069 if (id == AV_CODEC_ID_TRUESPEECH)
2070 return 240 * (frame_bytes / 32);
2071 if (id == AV_CODEC_ID_NELLYMOSER)
2072 return 256 * (frame_bytes / 64);
2073
2074 if (bps > 0) {
2075 /* calc from frame_bytes and bits_per_coded_sample */
2076 if (id == AV_CODEC_ID_ADPCM_G726)
2077 return frame_bytes * 8 / bps;
2078 }
2079
2080 if (ch > 0) {
2081 /* calc from frame_bytes and channels */
2082 switch (id) {
2083 case AV_CODEC_ID_ADPCM_4XM:
2084 case AV_CODEC_ID_ADPCM_IMA_ISS:
2085 return (frame_bytes - 4 * ch) * 2 / ch;
2086 case AV_CODEC_ID_ADPCM_IMA_SMJPEG:
2087 return (frame_bytes - 4) * 2 / ch;
2088 case AV_CODEC_ID_ADPCM_IMA_AMV:
2089 return (frame_bytes - 8) * 2 / ch;
2090 case AV_CODEC_ID_ADPCM_XA:
2091 return (frame_bytes / 128) * 224 / ch;
2092 case AV_CODEC_ID_INTERPLAY_DPCM:
2093 return (frame_bytes - 6 - ch) / ch;
2094 case AV_CODEC_ID_ROQ_DPCM:
2095 return (frame_bytes - 8) / ch;
2096 case AV_CODEC_ID_XAN_DPCM:
2097 return (frame_bytes - 2 * ch) / ch;
2098 case AV_CODEC_ID_MACE3:
2099 return 3 * frame_bytes / ch;
2100 case AV_CODEC_ID_MACE6:
2101 return 6 * frame_bytes / ch;
2102 case AV_CODEC_ID_PCM_LXF:
2103 return 2 * (frame_bytes / (5 * ch));
2104 }
2105
2106 if (tag) {
2107 /* calc from frame_bytes, channels, and codec_tag */
2108 if (id == AV_CODEC_ID_SOL_DPCM) {
2109 if (tag == 3)
2110 return frame_bytes / ch;
2111 else
2112 return frame_bytes * 2 / ch;
2113 }
2114 }
2115
2116 if (ba > 0) {
2117 /* calc from frame_bytes, channels, and block_align */
2118 int blocks = frame_bytes / ba;
2119 switch (avctx->codec_id) {
2120 case AV_CODEC_ID_ADPCM_IMA_WAV:
2121 return blocks * (1 + (ba - 4 * ch) / (4 * ch) * 8);
2122 case AV_CODEC_ID_ADPCM_IMA_DK3:
2123 return blocks * (((ba - 16) * 2 / 3 * 4) / ch);
2124 case AV_CODEC_ID_ADPCM_IMA_DK4:
2125 return blocks * (1 + (ba - 4 * ch) * 2 / ch);
2126 case AV_CODEC_ID_ADPCM_MS:
2127 return blocks * (2 + (ba - 7 * ch) * 2 / ch);
2128 }
2129 }
2130
2131 if (bps > 0) {
2132 /* calc from frame_bytes, channels, and bits_per_coded_sample */
2133 switch (avctx->codec_id) {
2134 case AV_CODEC_ID_PCM_DVD:
2135 return 2 * (frame_bytes / ((bps * 2 / 8) * ch));
2136 case AV_CODEC_ID_PCM_BLURAY:
2137 return frame_bytes / ((FFALIGN(ch, 2) * bps) / 8);
2138 case AV_CODEC_ID_S302M:
2139 return 2 * (frame_bytes / ((bps + 4) / 4)) / ch;
2140 }
2141 }
2142 }
2143 }
2144
2145 return 0;
2146 }
2147
2148 #if !HAVE_THREADS
2149 int ff_thread_init(AVCodecContext *s)
2150 {
2151 return -1;
2152 }
2153
2154 #endif
2155
2156 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
2157 {
2158 unsigned int n = 0;
2159
2160 while (v >= 0xff) {
2161 *s++ = 0xff;
2162 v -= 0xff;
2163 n++;
2164 }
2165 *s = v;
2166 n++;
2167 return n;
2168 }
2169
2170 int ff_match_2uint16(const uint16_t(*tab)[2], int size, int a, int b)
2171 {
2172 int i;
2173 for (i = 0; i < size && !(tab[i][0] == a && tab[i][1] == b); i++) ;
2174 return i;
2175 }
2176
2177 #if FF_API_MISSING_SAMPLE
2178 FF_DISABLE_DEPRECATION_WARNINGS
2179 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
2180 {
2181 av_log(avc, AV_LOG_WARNING, "%s is not implemented. Update your Libav "
2182 "version to the newest one from Git. If the problem still "
2183 "occurs, it means that your file has a feature which has not "
2184 "been implemented.\n", feature);
2185 if(want_sample)
2186 av_log_ask_for_sample(avc, NULL);
2187 }
2188
2189 void av_log_ask_for_sample(void *avc, const char *msg, ...)
2190 {
2191 va_list argument_list;
2192
2193 va_start(argument_list, msg);
2194
2195 if (msg)
2196 av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
2197 av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
2198 "of this file to ftp://upload.libav.org/incoming/ "
2199 "and contact the libav-devel mailing list.\n");
2200
2201 va_end(argument_list);
2202 }
2203 FF_ENABLE_DEPRECATION_WARNINGS
2204 #endif /* FF_API_MISSING_SAMPLE */
2205
2206 static AVHWAccel *first_hwaccel = NULL;
2207
2208 void av_register_hwaccel(AVHWAccel *hwaccel)
2209 {
2210 AVHWAccel **p = &first_hwaccel;
2211 while (*p)
2212 p = &(*p)->next;
2213 *p = hwaccel;
2214 hwaccel->next = NULL;
2215 }
2216
2217 AVHWAccel *av_hwaccel_next(const AVHWAccel *hwaccel)
2218 {
2219 return hwaccel ? hwaccel->next : first_hwaccel;
2220 }
2221
2222 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
2223 {
2224 if (lockmgr_cb) {
2225 // There is no good way to rollback a failure to destroy the
2226 // mutex, so we ignore failures.
2227 lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY);
2228 lockmgr_cb(&avformat_mutex, AV_LOCK_DESTROY);
2229 lockmgr_cb = NULL;
2230 codec_mutex = NULL;
2231 avformat_mutex = NULL;
2232 }
2233
2234 if (cb) {
2235 void *new_codec_mutex = NULL;
2236 void *new_avformat_mutex = NULL;
2237 int err;
2238 if (err = cb(&new_codec_mutex, AV_LOCK_CREATE)) {
2239 return err > 0 ? AVERROR_UNKNOWN : err;
2240 }
2241 if (err = cb(&new_avformat_mutex, AV_LOCK_CREATE)) {
2242 // Ignore failures to destroy the newly created mutex.
2243 cb(&new_codec_mutex, AV_LOCK_DESTROY);
2244 return err > 0 ? AVERROR_UNKNOWN : err;
2245 }
2246 lockmgr_cb = cb;
2247 codec_mutex = new_codec_mutex;
2248 avformat_mutex = new_avformat_mutex;
2249 }
2250
2251 return 0;
2252 }
2253
2254 int avpriv_lock_avformat(void)
2255 {
2256 if (lockmgr_cb) {
2257 if ((*lockmgr_cb)(&avformat_mutex, AV_LOCK_OBTAIN))
2258 return -1;
2259 }
2260 return 0;
2261 }
2262
2263 int avpriv_unlock_avformat(void)
2264 {
2265 if (lockmgr_cb) {
2266 if ((*lockmgr_cb)(&avformat_mutex, AV_LOCK_RELEASE))
2267 return -1;
2268 }
2269 return 0;
2270 }
2271
2272 unsigned int avpriv_toupper4(unsigned int x)
2273 {
2274 return av_toupper(x & 0xFF) +
2275 (av_toupper((x >> 8) & 0xFF) << 8) +
2276 (av_toupper((x >> 16) & 0xFF) << 16) +
2277 (av_toupper((x >> 24) & 0xFF) << 24);
2278 }
2279
2280 int ff_thread_ref_frame(ThreadFrame *dst, ThreadFrame *src)
2281 {
2282 int ret;
2283
2284 dst->owner = src->owner;
2285
2286 ret = av_frame_ref(dst->f, src->f);
2287 if (ret < 0)
2288 return ret;
2289
2290 if (src->progress &&
2291 !(dst->progress = av_buffer_ref(src->progress))) {
2292 ff_thread_release_buffer(dst->owner, dst);
2293 return AVERROR(ENOMEM);
2294 }
2295
2296 return 0;
2297 }
2298
2299 #if !HAVE_THREADS
2300
2301 int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
2302 {
2303 f->owner = avctx;
2304 return ff_get_buffer(avctx, f->f, flags);
2305 }
2306
2307 void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
2308 {
2309 if (f->f)
2310 av_frame_unref(f->f);
2311 }
2312
2313 void ff_thread_finish_setup(AVCodecContext *avctx)
2314 {
2315 }
2316
2317 void ff_thread_report_progress(ThreadFrame *f, int progress, int field)
2318 {
2319 }
2320
2321 void ff_thread_await_progress(ThreadFrame *f, int progress, int field)
2322 {
2323 }
2324
2325 #endif
2326
2327 int avcodec_is_open(AVCodecContext *s)
2328 {
2329 return !!s->internal;
2330 }
2331
2332 const uint8_t *avpriv_find_start_code(const uint8_t *restrict p,
2333 const uint8_t *end,
2334 uint32_t * restrict state)
2335 {
2336 int i;
2337
2338 assert(p <= end);
2339 if (p >= end)
2340 return end;
2341
2342 for (i = 0; i < 3; i++) {
2343 uint32_t tmp = *state << 8;
2344 *state = tmp + *(p++);
2345 if (tmp == 0x100 || p == end)
2346 return p;
2347 }
2348
2349 while (p < end) {
2350 if (p[-1] > 1 ) p += 3;
2351 else if (p[-2] ) p += 2;
2352 else if (p[-3]|(p[-1]-1)) p++;
2353 else {
2354 p++;
2355 break;
2356 }
2357 }
2358
2359 p = FFMIN(p, end) - 4;
2360 *state = AV_RB32(p);
2361
2362 return p + 4;
2363 }