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lavc decoders: work with refcounted frames.
[FFMpeg-mirror/mplayer-patches.git] / libavcodec / utils.c
blob7e451bfa0b578f8ef66df82527860bd906dd1f57
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/avassert.h"
30 #include "libavutil/avstring.h"
31 #include "libavutil/channel_layout.h"
32 #include "libavutil/crc.h"
33 #include "libavutil/frame.h"
34 #include "libavutil/mathematics.h"
35 #include "libavutil/pixdesc.h"
36 #include "libavutil/imgutils.h"
37 #include "libavutil/samplefmt.h"
38 #include "libavutil/dict.h"
39 #include "avcodec.h"
40 #include "dsputil.h"
41 #include "libavutil/opt.h"
42 #include "thread.h"
43 #include "internal.h"
44 #include "bytestream.h"
45 #include <stdlib.h>
46 #include <stdarg.h>
47 #include <limits.h>
48 #include <float.h>
49
50 static int volatile entangled_thread_counter = 0;
51 static int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
52 static void *codec_mutex;
53 static void *avformat_mutex;
54
55 void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
56 {
57 if (min_size < *size)
58 return ptr;
59
60 min_size = FFMAX(17 * min_size / 16 + 32, min_size);
61
62 ptr = av_realloc(ptr, min_size);
63 /* we could set this to the unmodified min_size but this is safer
64 * if the user lost the ptr and uses NULL now
65 */
66 if (!ptr)
67 min_size = 0;
68
69 *size = min_size;
70
71 return ptr;
72 }
73
74 void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
75 {
76 void **p = ptr;
77 if (min_size < *size)
78 return;
79 min_size = FFMAX(17 * min_size / 16 + 32, min_size);
80 av_free(*p);
81 *p = av_malloc(min_size);
82 if (!*p)
83 min_size = 0;
84 *size = min_size;
85 }
86
87 void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
88 {
89 void **p = ptr;
90 if (min_size > SIZE_MAX - FF_INPUT_BUFFER_PADDING_SIZE) {
91 av_freep(p);
92 *size = 0;
93 return;
94 }
95 av_fast_malloc(p, size, min_size + FF_INPUT_BUFFER_PADDING_SIZE);
96 if (*size)
97 memset((uint8_t *)*p + min_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
98 }
99
100 /* encoder management */
101 static AVCodec *first_avcodec = NULL;
102
103 AVCodec *av_codec_next(const AVCodec *c)
104 {
105 if (c)
106 return c->next;
107 else
108 return first_avcodec;
109 }
110
111 static void avcodec_init(void)
112 {
113 static int initialized = 0;
114
115 if (initialized != 0)
116 return;
117 initialized = 1;
118
119 ff_dsputil_static_init();
120 }
121
122 int av_codec_is_encoder(const AVCodec *codec)
123 {
124 return codec && (codec->encode_sub || codec->encode2);
125 }
126
127 int av_codec_is_decoder(const AVCodec *codec)
128 {
129 return codec && codec->decode;
130 }
131
132 void avcodec_register(AVCodec *codec)
133 {
134 AVCodec **p;
135 avcodec_init();
136 p = &first_avcodec;
137 while (*p != NULL)
138 p = &(*p)->next;
139 *p = codec;
140 codec->next = NULL;
141
142 if (codec->init_static_data)
143 codec->init_static_data(codec);
144 }
145
146 unsigned avcodec_get_edge_width(void)
147 {
148 return EDGE_WIDTH;
149 }
150
151 void avcodec_set_dimensions(AVCodecContext *s, int width, int height)
152 {
153 s->coded_width = width;
154 s->coded_height = height;
155 s->width = width;
156 s->height = height;
157 }
158
159 #if (ARCH_ARM && HAVE_NEON) || ARCH_PPC || HAVE_MMX
160 # define STRIDE_ALIGN 16
161 #else
162 # define STRIDE_ALIGN 8
163 #endif
164
165 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
166 int linesize_align[AV_NUM_DATA_POINTERS])
167 {
168 int i;
169 int w_align = 1;
170 int h_align = 1;
171
172 switch (s->pix_fmt) {
173 case AV_PIX_FMT_YUV420P:
174 case AV_PIX_FMT_YUYV422:
175 case AV_PIX_FMT_UYVY422:
176 case AV_PIX_FMT_YUV422P:
177 case AV_PIX_FMT_YUV440P:
178 case AV_PIX_FMT_YUV444P:
179 case AV_PIX_FMT_GBRP:
180 case AV_PIX_FMT_GRAY8:
181 case AV_PIX_FMT_GRAY16BE:
182 case AV_PIX_FMT_GRAY16LE:
183 case AV_PIX_FMT_YUVJ420P:
184 case AV_PIX_FMT_YUVJ422P:
185 case AV_PIX_FMT_YUVJ440P:
186 case AV_PIX_FMT_YUVJ444P:
187 case AV_PIX_FMT_YUVA420P:
188 case AV_PIX_FMT_YUVA422P:
189 case AV_PIX_FMT_YUVA444P:
190 case AV_PIX_FMT_YUV420P9LE:
191 case AV_PIX_FMT_YUV420P9BE:
192 case AV_PIX_FMT_YUV420P10LE:
193 case AV_PIX_FMT_YUV420P10BE:
194 case AV_PIX_FMT_YUV422P9LE:
195 case AV_PIX_FMT_YUV422P9BE:
196 case AV_PIX_FMT_YUV422P10LE:
197 case AV_PIX_FMT_YUV422P10BE:
198 case AV_PIX_FMT_YUV444P9LE:
199 case AV_PIX_FMT_YUV444P9BE:
200 case AV_PIX_FMT_YUV444P10LE:
201 case AV_PIX_FMT_YUV444P10BE:
202 case AV_PIX_FMT_GBRP9LE:
203 case AV_PIX_FMT_GBRP9BE:
204 case AV_PIX_FMT_GBRP10LE:
205 case AV_PIX_FMT_GBRP10BE:
206 w_align = 16; //FIXME assume 16 pixel per macroblock
207 h_align = 16 * 2; // interlaced needs 2 macroblocks height
208 break;
209 case AV_PIX_FMT_YUV411P:
210 case AV_PIX_FMT_UYYVYY411:
211 w_align = 32;
212 h_align = 8;
213 break;
214 case AV_PIX_FMT_YUV410P:
215 if (s->codec_id == AV_CODEC_ID_SVQ1) {
216 w_align = 64;
217 h_align = 64;
218 }
219 case AV_PIX_FMT_RGB555:
220 if (s->codec_id == AV_CODEC_ID_RPZA) {
221 w_align = 4;
222 h_align = 4;
223 }
224 case AV_PIX_FMT_PAL8:
225 case AV_PIX_FMT_BGR8:
226 case AV_PIX_FMT_RGB8:
227 if (s->codec_id == AV_CODEC_ID_SMC) {
228 w_align = 4;
229 h_align = 4;
230 }
231 break;
232 case AV_PIX_FMT_BGR24:
233 if ((s->codec_id == AV_CODEC_ID_MSZH) ||
234 (s->codec_id == AV_CODEC_ID_ZLIB)) {
235 w_align = 4;
236 h_align = 4;
237 }
238 break;
239 default:
240 w_align = 1;
241 h_align = 1;
242 break;
243 }
244
245 *width = FFALIGN(*width, w_align);
246 *height = FFALIGN(*height, h_align);
247 if (s->codec_id == AV_CODEC_ID_H264)
248 // some of the optimized chroma MC reads one line too much
249 *height += 2;
250
251 for (i = 0; i < 4; i++)
252 linesize_align[i] = STRIDE_ALIGN;
253 }
254
255 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height)
256 {
257 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(s->pix_fmt);
258 int chroma_shift = desc->log2_chroma_w;
259 int linesize_align[AV_NUM_DATA_POINTERS];
260 int align;
261
262 avcodec_align_dimensions2(s, width, height, linesize_align);
263 align = FFMAX(linesize_align[0], linesize_align[3]);
264 linesize_align[1] <<= chroma_shift;
265 linesize_align[2] <<= chroma_shift;
266 align = FFMAX3(align, linesize_align[1], linesize_align[2]);
267 *width = FFALIGN(*width, align);
268 }
269
270 int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
271 enum AVSampleFormat sample_fmt, const uint8_t *buf,
272 int buf_size, int align)
273 {
274 int ch, planar, needed_size, ret = 0;
275
276 needed_size = av_samples_get_buffer_size(NULL, nb_channels,
277 frame->nb_samples, sample_fmt,
278 align);
279 if (buf_size < needed_size)
280 return AVERROR(EINVAL);
281
282 planar = av_sample_fmt_is_planar(sample_fmt);
283 if (planar && nb_channels > AV_NUM_DATA_POINTERS) {
284 if (!(frame->extended_data = av_mallocz(nb_channels *
285 sizeof(*frame->extended_data))))
286 return AVERROR(ENOMEM);
287 } else {
288 frame->extended_data = frame->data;
289 }
290
291 if ((ret = av_samples_fill_arrays(frame->extended_data, &frame->linesize[0],
292 buf, nb_channels, frame->nb_samples,
293 sample_fmt, align)) < 0) {
294 if (frame->extended_data != frame->data)
295 av_free(frame->extended_data);
296 return ret;
297 }
298 if (frame->extended_data != frame->data) {
299 for (ch = 0; ch < AV_NUM_DATA_POINTERS; ch++)
300 frame->data[ch] = frame->extended_data[ch];
301 }
302
303 return ret;
304 }
305
306 static int update_frame_pool(AVCodecContext *avctx, AVFrame *frame)
307 {
308 FramePool *pool = avctx->internal->pool;
309 int i, ret;
310
311 switch (avctx->codec_type) {
312 case AVMEDIA_TYPE_VIDEO: {
313 AVPicture picture;
314 int size[4] = { 0 };
315 int w = frame->width;
316 int h = frame->height;
317 int tmpsize, unaligned;
318
319 if (pool->format == frame->format &&
320 pool->width == frame->width && pool->height == frame->height)
321 return 0;
322
323 avcodec_align_dimensions2(avctx, &w, &h, pool->stride_align);
324
325 if (!(avctx->flags & CODEC_FLAG_EMU_EDGE)) {
326 w += EDGE_WIDTH * 2;
327 h += EDGE_WIDTH * 2;
328 }
329
330 do {
331 // NOTE: do not align linesizes individually, this breaks e.g. assumptions
332 // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
333 av_image_fill_linesizes(picture.linesize, avctx->pix_fmt, w);
334 // increase alignment of w for next try (rhs gives the lowest bit set in w)
335 w += w & ~(w - 1);
336
337 unaligned = 0;
338 for (i = 0; i < 4; i++)
339 unaligned |= picture.linesize[i] % pool->stride_align[i];
340 } while (unaligned);
341
342 tmpsize = av_image_fill_pointers(picture.data, avctx->pix_fmt, h,
343 NULL, picture.linesize);
344 if (tmpsize < 0)
345 return -1;
346
347 for (i = 0; i < 3 && picture.data[i + 1]; i++)
348 size[i] = picture.data[i + 1] - picture.data[i];
349 size[i] = tmpsize - (picture.data[i] - picture.data[0]);
350
351 for (i = 0; i < 4; i++) {
352 av_buffer_pool_uninit(&pool->pools[i]);
353 pool->linesize[i] = picture.linesize[i];
354 if (size[i]) {
355 pool->pools[i] = av_buffer_pool_init(size[i] + 16, NULL);
356 if (!pool->pools[i]) {
357 ret = AVERROR(ENOMEM);
358 goto fail;
359 }
360 }
361 }
362 pool->format = frame->format;
363 pool->width = frame->width;
364 pool->height = frame->height;
365
366 break;
367 }
368 case AVMEDIA_TYPE_AUDIO: {
369 int ch = av_get_channel_layout_nb_channels(frame->channel_layout);
370 int planar = av_sample_fmt_is_planar(frame->format);
371 int planes = planar ? ch : 1;
372
373 if (pool->format == frame->format && pool->planes == planes &&
374 pool->channels == ch && frame->nb_samples == pool->samples)
375 return 0;
376
377 av_buffer_pool_uninit(&pool->pools[0]);
378 ret = av_samples_get_buffer_size(&pool->linesize[0], ch,
379 frame->nb_samples, frame->format, 0);
380 if (ret < 0)
381 goto fail;
382
383 pool->pools[0] = av_buffer_pool_init(pool->linesize[0], NULL);
384 if (!pool->pools[0]) {
385 ret = AVERROR(ENOMEM);
386 goto fail;
387 }
388
389 pool->format = frame->format;
390 pool->planes = planes;
391 pool->channels = ch;
392 pool->samples = frame->nb_samples;
393 break;
394 }
395 default: av_assert0(0);
396 }
397 return 0;
398 fail:
399 for (i = 0; i < 4; i++)
400 av_buffer_pool_uninit(&pool->pools[i]);
401 pool->format = -1;
402 pool->planes = pool->channels = pool->samples = 0;
403 pool->width = pool->height = 0;
404 return ret;
405 }
406
407 static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
408 {
409 FramePool *pool = avctx->internal->pool;
410 int planes = pool->planes;
411 int i;
412
413 frame->linesize[0] = pool->linesize[0];
414
415 if (planes > AV_NUM_DATA_POINTERS) {
416 frame->extended_data = av_mallocz(planes * sizeof(*frame->extended_data));
417 frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS;
418 frame->extended_buf = av_mallocz(frame->nb_extended_buf *
419 sizeof(*frame->extended_buf));
420 if (!frame->extended_data || !frame->extended_buf) {
421 av_freep(&frame->extended_data);
422 av_freep(&frame->extended_buf);
423 return AVERROR(ENOMEM);
424 }
425 } else
426 frame->extended_data = frame->data;
427
428 for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) {
429 frame->buf[i] = av_buffer_pool_get(pool->pools[0]);
430 if (!frame->buf[i])
431 goto fail;
432 frame->extended_data[i] = frame->data[i] = frame->buf[i]->data;
433 }
434 for (i = 0; i < frame->nb_extended_buf; i++) {
435 frame->extended_buf[i] = av_buffer_pool_get(pool->pools[0]);
436 if (!frame->extended_buf[i])
437 goto fail;
438 frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data;
439 }
440
441 if (avctx->debug & FF_DEBUG_BUFFERS)
442 av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p", frame);
443
444 return 0;
445 fail:
446 av_frame_unref(frame);
447 return AVERROR(ENOMEM);
448 }
449
450 static int video_get_buffer(AVCodecContext *s, AVFrame *pic)
451 {
452 FramePool *pool = s->internal->pool;
453 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pic->format);
454 int pixel_size = desc->comp[0].step_minus1 + 1;
455 int h_chroma_shift, v_chroma_shift;
456 int i;
457
458 if (pic->data[0] != NULL) {
459 av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
460 return -1;
461 }
462
463 memset(pic->data, 0, sizeof(pic->data));
464 pic->extended_data = pic->data;
465
466 av_pix_fmt_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
467
468 for (i = 0; i < 4 && pool->pools[i]; i++) {
469 const int h_shift = i == 0 ? 0 : h_chroma_shift;
470 const int v_shift = i == 0 ? 0 : v_chroma_shift;
471
472 pic->linesize[i] = pool->linesize[i];
473
474 pic->buf[i] = av_buffer_pool_get(pool->pools[i]);
475 if (!pic->buf[i])
476 goto fail;
477
478 // no edge if EDGE EMU or not planar YUV
479 if ((s->flags & CODEC_FLAG_EMU_EDGE) || !pool->pools[2])
480 pic->data[i] = pic->buf[i]->data;
481 else {
482 pic->data[i] = pic->buf[i]->data +
483 FFALIGN((pic->linesize[i] * EDGE_WIDTH >> v_shift) +
484 (pixel_size * EDGE_WIDTH >> h_shift), pool->stride_align[i]);
485 }
486 }
487 for (; i < AV_NUM_DATA_POINTERS; i++) {
488 pic->data[i] = NULL;
489 pic->linesize[i] = 0;
490 }
491 if (pic->data[1] && !pic->data[2])
492 avpriv_set_systematic_pal2((uint32_t *)pic->data[1], s->pix_fmt);
493
494 if (s->debug & FF_DEBUG_BUFFERS)
495 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p\n", pic);
496
497 return 0;
498 fail:
499 av_frame_unref(pic);
500 return AVERROR(ENOMEM);
501 }
502
503 int avcodec_default_get_buffer2(AVCodecContext *avctx, AVFrame *frame, int flags)
504 {
505 int ret;
506
507 if ((ret = update_frame_pool(avctx, frame)) < 0)
508 return ret;
509
510 #if FF_API_GET_BUFFER
511 frame->type = FF_BUFFER_TYPE_INTERNAL;
512 #endif
513
514 switch (avctx->codec_type) {
515 case AVMEDIA_TYPE_VIDEO:
516 return video_get_buffer(avctx, frame);
517 case AVMEDIA_TYPE_AUDIO:
518 return audio_get_buffer(avctx, frame);
519 default:
520 return -1;
521 }
522 }
523
524 #if FF_API_GET_BUFFER
525 int avcodec_default_get_buffer(AVCodecContext *avctx, AVFrame *frame)
526 {
527 return avcodec_default_get_buffer2(avctx, frame, 0);
528 }
529
530 typedef struct CompatReleaseBufPriv {
531 AVCodecContext avctx;
532 AVFrame frame;
533 } CompatReleaseBufPriv;
534
535 static void compat_free_buffer(void *opaque, uint8_t *data)
536 {
537 CompatReleaseBufPriv *priv = opaque;
538 priv->avctx.release_buffer(&priv->avctx, &priv->frame);
539 av_freep(&priv);
540 }
541
542 static void compat_release_buffer(void *opaque, uint8_t *data)
543 {
544 AVBufferRef *buf = opaque;
545 av_buffer_unref(&buf);
546 }
547 #endif
548
549 int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
550 {
551 int ret;
552
553 switch (avctx->codec_type) {
554 case AVMEDIA_TYPE_VIDEO:
555 frame->width = avctx->width;
556 frame->height = avctx->height;
557 frame->format = avctx->pix_fmt;
558 frame->sample_aspect_ratio = avctx->sample_aspect_ratio;
559
560 if ((ret = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
561 return ret;
562 break;
563 case AVMEDIA_TYPE_AUDIO:
564 frame->sample_rate = avctx->sample_rate;
565 frame->format = avctx->sample_fmt;
566 frame->channel_layout = avctx->channel_layout;
567 break;
568 default: return AVERROR(EINVAL);
569 }
570
571 frame->pkt_pts = avctx->pkt ? avctx->pkt->pts : AV_NOPTS_VALUE;
572 frame->reordered_opaque = avctx->reordered_opaque;
573
574 #if FF_API_GET_BUFFER
575 /*
576 * Wrap an old get_buffer()-allocated buffer in an bunch of AVBuffers.
577 * We wrap each plane in its own AVBuffer. Each of those has a reference to
578 * a dummy AVBuffer as its private data, unreffing it on free.
579 * When all the planes are freed, the dummy buffer's free callback calls
580 * release_buffer().
581 */
582 if (avctx->get_buffer) {
583 CompatReleaseBufPriv *priv = NULL;
584 AVBufferRef *dummy_buf = NULL;
585 int planes, i, ret;
586
587 if (flags & AV_GET_BUFFER_FLAG_REF)
588 frame->reference = 1;
589
590 ret = avctx->get_buffer(avctx, frame);
591 if (ret < 0)
592 return ret;
593
594 /* return if the buffers are already set up
595 * this would happen e.g. when a custom get_buffer() calls
596 * avcodec_default_get_buffer
597 */
598 if (frame->buf[0])
599 return 0;
600
601 priv = av_mallocz(sizeof(*priv));
602 if (!priv) {
603 ret = AVERROR(ENOMEM);
604 goto fail;
605 }
606 priv->avctx = *avctx;
607 priv->frame = *frame;
608
609 dummy_buf = av_buffer_create(NULL, 0, compat_free_buffer, priv, 0);
610 if (!dummy_buf) {
611 ret = AVERROR(ENOMEM);
612 goto fail;
613 }
614
615 #define WRAP_PLANE(ref_out, data, data_size) \
616 do { \
617 AVBufferRef *dummy_ref = av_buffer_ref(dummy_buf); \
618 if (!dummy_ref) { \
619 ret = AVERROR(ENOMEM); \
620 goto fail; \
621 } \
622 ref_out = av_buffer_create(data, data_size, compat_release_buffer, \
623 dummy_ref, 0); \
624 if (!ref_out) { \
625 av_frame_unref(frame); \
626 ret = AVERROR(ENOMEM); \
627 goto fail; \
628 } \
629 } while (0)
630
631 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
632 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
633
634 if (!desc) {
635 ret = AVERROR(EINVAL);
636 goto fail;
637 }
638 planes = (desc->flags & PIX_FMT_PLANAR) ? desc->nb_components : 1;
639
640 for (i = 0; i < planes; i++) {
641 int h_shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
642 int plane_size = (frame->width >> h_shift) * frame->linesize[i];
643
644 WRAP_PLANE(frame->buf[i], frame->data[i], plane_size);
645 }
646 } else {
647 int planar = av_sample_fmt_is_planar(frame->format);
648 planes = planar ? avctx->channels : 1;
649
650 if (planes > FF_ARRAY_ELEMS(frame->buf)) {
651 frame->nb_extended_buf = planes - FF_ARRAY_ELEMS(frame->buf);
652 frame->extended_buf = av_malloc(sizeof(*frame->extended_buf) *
653 frame->nb_extended_buf);
654 if (!frame->extended_buf) {
655 ret = AVERROR(ENOMEM);
656 goto fail;
657 }
658 }
659
660 for (i = 0; i < FFMIN(planes, FF_ARRAY_ELEMS(frame->buf)); i++)
661 WRAP_PLANE(frame->buf[i], frame->extended_data[i], frame->linesize[0]);
662
663 for (i = 0; i < planes - FF_ARRAY_ELEMS(frame->buf); i++)
664 WRAP_PLANE(frame->extended_buf[i],
665 frame->extended_data[i + FF_ARRAY_ELEMS(frame->buf)],
666 frame->linesize[0]);
667 }
668
669 av_buffer_unref(&dummy_buf);
670
671 return 0;
672
673 fail:
674 avctx->release_buffer(avctx, frame);
675 av_freep(&priv);
676 av_buffer_unref(&dummy_buf);
677 return ret;
678 }
679 #endif
680
681 return avctx->get_buffer2(avctx, frame, flags);
682 }
683
684 int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame)
685 {
686 AVFrame tmp;
687 int ret;
688
689 av_assert0(avctx->codec_type == AVMEDIA_TYPE_VIDEO);
690
691 if (!frame->data[0])
692 return ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
693
694 if (av_frame_is_writable(frame))
695 return 0;
696
697 av_frame_move_ref(&tmp, frame);
698
699 ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
700 if (ret < 0) {
701 av_frame_unref(&tmp);
702 return ret;
703 }
704
705 av_image_copy(frame->data, frame->linesize, tmp.data, tmp.linesize,
706 frame->format, frame->width, frame->height);
707
708 av_frame_unref(&tmp);
709
710 return 0;
711 }
712
713 #if FF_API_GET_BUFFER
714 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic)
715 {
716 av_frame_unref(pic);
717 }
718
719 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic)
720 {
721 av_assert0(0);
722 }
723 #endif
724
725 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size)
726 {
727 int i;
728
729 for (i = 0; i < count; i++) {
730 int r = func(c, (char *)arg + i * size);
731 if (ret)
732 ret[i] = r;
733 }
734 return 0;
735 }
736
737 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr), void *arg, int *ret, int count)
738 {
739 int i;
740
741 for (i = 0; i < count; i++) {
742 int r = func(c, arg, i, 0);
743 if (ret)
744 ret[i] = r;
745 }
746 return 0;
747 }
748
749 static int is_hwaccel_pix_fmt(enum AVPixelFormat pix_fmt)
750 {
751 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
752 return desc->flags & PIX_FMT_HWACCEL;
753 }
754
755 enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
756 {
757 while (*fmt != AV_PIX_FMT_NONE && is_hwaccel_pix_fmt(*fmt))
758 ++fmt;
759 return fmt[0];
760 }
761
762 void avcodec_get_frame_defaults(AVFrame *frame)
763 {
764 if (frame->extended_data != frame->data)
765 av_freep(&frame->extended_data);
766
767 memset(frame, 0, sizeof(AVFrame));
768
769 frame->pts = AV_NOPTS_VALUE;
770 frame->key_frame = 1;
771 frame->sample_aspect_ratio = (AVRational) {0, 1 };
772 frame->format = -1; /* unknown */
773 frame->extended_data = frame->data;
774 }
775
776 AVFrame *avcodec_alloc_frame(void)
777 {
778 AVFrame *frame = av_mallocz(sizeof(AVFrame));
779
780 if (frame == NULL)
781 return NULL;
782
783 avcodec_get_frame_defaults(frame);
784
785 return frame;
786 }
787
788 void avcodec_free_frame(AVFrame **frame)
789 {
790 AVFrame *f;
791
792 if (!frame || !*frame)
793 return;
794
795 f = *frame;
796
797 if (f->extended_data != f->data)
798 av_freep(&f->extended_data);
799
800 av_freep(frame);
801 }
802
803 int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
804 {
805 int ret = 0;
806 AVDictionary *tmp = NULL;
807
808 if (avcodec_is_open(avctx))
809 return 0;
810
811 if ((!codec && !avctx->codec)) {
812 av_log(avctx, AV_LOG_ERROR, "No codec provided to avcodec_open2().\n");
813 return AVERROR(EINVAL);
814 }
815 if ((codec && avctx->codec && codec != avctx->codec)) {
816 av_log(avctx, AV_LOG_ERROR, "This AVCodecContext was allocated for %s, "
817 "but %s passed to avcodec_open2().\n", avctx->codec->name, codec->name);
818 return AVERROR(EINVAL);
819 }
820 if (!codec)
821 codec = avctx->codec;
822
823 if (avctx->extradata_size < 0 || avctx->extradata_size >= FF_MAX_EXTRADATA_SIZE)
824 return AVERROR(EINVAL);
825
826 if (options)
827 av_dict_copy(&tmp, *options, 0);
828
829 /* If there is a user-supplied mutex locking routine, call it. */
830 if (ff_lockmgr_cb) {
831 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
832 return -1;
833 }
834
835 entangled_thread_counter++;
836 if (entangled_thread_counter != 1) {
837 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
838 ret = -1;
839 goto end;
840 }
841
842 avctx->internal = av_mallocz(sizeof(AVCodecInternal));
843 if (!avctx->internal) {
844 ret = AVERROR(ENOMEM);
845 goto end;
846 }
847
848 avctx->internal->pool = av_mallocz(sizeof(*avctx->internal->pool));
849 if (!avctx->internal->pool) {
850 ret = AVERROR(ENOMEM);
851 goto free_and_end;
852 }
853
854 if (codec->priv_data_size > 0) {
855 if (!avctx->priv_data) {
856 avctx->priv_data = av_mallocz(codec->priv_data_size);
857 if (!avctx->priv_data) {
858 ret = AVERROR(ENOMEM);
859 goto end;
860 }
861 if (codec->priv_class) {
862 *(const AVClass **)avctx->priv_data = codec->priv_class;
863 av_opt_set_defaults(avctx->priv_data);
864 }
865 }
866 if (codec->priv_class && (ret = av_opt_set_dict(avctx->priv_data, &tmp)) < 0)
867 goto free_and_end;
868 } else {
869 avctx->priv_data = NULL;
870 }
871 if ((ret = av_opt_set_dict(avctx, &tmp)) < 0)
872 goto free_and_end;
873
874 if (avctx->coded_width && avctx->coded_height)
875 avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
876 else if (avctx->width && avctx->height)
877 avcodec_set_dimensions(avctx, avctx->width, avctx->height);
878
879 if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
880 && ( av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0
881 || av_image_check_size(avctx->width, avctx->height, 0, avctx) < 0)) {
882 av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n");
883 avcodec_set_dimensions(avctx, 0, 0);
884 }
885
886 /* if the decoder init function was already called previously,
887 * free the already allocated subtitle_header before overwriting it */
888 if (av_codec_is_decoder(codec))
889 av_freep(&avctx->subtitle_header);
890
891 if (avctx->channels > FF_SANE_NB_CHANNELS) {
892 ret = AVERROR(EINVAL);
893 goto free_and_end;
894 }
895
896 avctx->codec = codec;
897 if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
898 avctx->codec_id == AV_CODEC_ID_NONE) {
899 avctx->codec_type = codec->type;
900 avctx->codec_id = codec->id;
901 }
902 if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type
903 && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
904 av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
905 ret = AVERROR(EINVAL);
906 goto free_and_end;
907 }
908 avctx->frame_number = 0;
909
910 if (avctx->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
911 avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
912 ret = AVERROR_EXPERIMENTAL;
913 goto free_and_end;
914 }
915
916 if (avctx->codec_type == AVMEDIA_TYPE_AUDIO &&
917 (!avctx->time_base.num || !avctx->time_base.den)) {
918 avctx->time_base.num = 1;
919 avctx->time_base.den = avctx->sample_rate;
920 }
921
922 if (HAVE_THREADS && !avctx->thread_opaque) {
923 ret = ff_thread_init(avctx);
924 if (ret < 0) {
925 goto free_and_end;
926 }
927 }
928 if (!HAVE_THREADS && !(codec->capabilities & CODEC_CAP_AUTO_THREADS))
929 avctx->thread_count = 1;
930
931 if (av_codec_is_encoder(avctx->codec)) {
932 int i;
933 if (avctx->codec->sample_fmts) {
934 for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++) {
935 if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
936 break;
937 if (avctx->channels == 1 &&
938 av_get_planar_sample_fmt(avctx->sample_fmt) ==
939 av_get_planar_sample_fmt(avctx->codec->sample_fmts[i])) {
940 avctx->sample_fmt = avctx->codec->sample_fmts[i];
941 break;
942 }
943 }
944 if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
945 av_log(avctx, AV_LOG_ERROR, "Specified sample_fmt is not supported.\n");
946 ret = AVERROR(EINVAL);
947 goto free_and_end;
948 }
949 }
950 if (avctx->codec->pix_fmts) {
951 for (i = 0; avctx->codec->pix_fmts[i] != AV_PIX_FMT_NONE; i++)
952 if (avctx->pix_fmt == avctx->codec->pix_fmts[i])
953 break;
954 if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_NONE) {
955 av_log(avctx, AV_LOG_ERROR, "Specified pix_fmt is not supported\n");
956 ret = AVERROR(EINVAL);
957 goto free_and_end;
958 }
959 }
960 if (avctx->codec->supported_samplerates) {
961 for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)
962 if (avctx->sample_rate == avctx->codec->supported_samplerates[i])
963 break;
964 if (avctx->codec->supported_samplerates[i] == 0) {
965 av_log(avctx, AV_LOG_ERROR, "Specified sample_rate is not supported\n");
966 ret = AVERROR(EINVAL);
967 goto free_and_end;
968 }
969 }
970 if (avctx->codec->channel_layouts) {
971 if (!avctx->channel_layout) {
972 av_log(avctx, AV_LOG_WARNING, "channel_layout not specified\n");
973 } else {
974 for (i = 0; avctx->codec->channel_layouts[i] != 0; i++)
975 if (avctx->channel_layout == avctx->codec->channel_layouts[i])
976 break;
977 if (avctx->codec->channel_layouts[i] == 0) {
978 av_log(avctx, AV_LOG_ERROR, "Specified channel_layout is not supported\n");
979 ret = AVERROR(EINVAL);
980 goto free_and_end;
981 }
982 }
983 }
984 if (avctx->channel_layout && avctx->channels) {
985 if (av_get_channel_layout_nb_channels(avctx->channel_layout) != avctx->channels) {
986 av_log(avctx, AV_LOG_ERROR, "channel layout does not match number of channels\n");
987 ret = AVERROR(EINVAL);
988 goto free_and_end;
989 }
990 } else if (avctx->channel_layout) {
991 avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
992 }
993
994 if (!avctx->rc_initial_buffer_occupancy)
995 avctx->rc_initial_buffer_occupancy = avctx->rc_buffer_size * 3 / 4;
996 }
997
998 if (avctx->codec->init && !(avctx->active_thread_type & FF_THREAD_FRAME)) {
999 ret = avctx->codec->init(avctx);
1000 if (ret < 0) {
1001 goto free_and_end;
1002 }
1003 }
1004
1005 if (av_codec_is_decoder(avctx->codec)) {
1006 /* validate channel layout from the decoder */
1007 if (avctx->channel_layout) {
1008 int channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
1009 if (!avctx->channels)
1010 avctx->channels = channels;
1011 else if (channels != avctx->channels) {
1012 av_log(avctx, AV_LOG_WARNING,
1013 "channel layout does not match number of channels\n");
1014 avctx->channel_layout = 0;
1015 }
1016 }
1017 if (avctx->channels && avctx->channels < 0 ||
1018 avctx->channels > FF_SANE_NB_CHANNELS) {
1019 ret = AVERROR(EINVAL);
1020 goto free_and_end;
1021 }
1022 }
1023 end:
1024 entangled_thread_counter--;
1025
1026 /* Release any user-supplied mutex. */
1027 if (ff_lockmgr_cb) {
1028 (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
1029 }
1030 if (options) {
1031 av_dict_free(options);
1032 *options = tmp;
1033 }
1034
1035 return ret;
1036 free_and_end:
1037 av_dict_free(&tmp);
1038 av_freep(&avctx->priv_data);
1039 if (avctx->internal)
1040 av_freep(&avctx->internal->pool);
1041 av_freep(&avctx->internal);
1042 avctx->codec = NULL;
1043 goto end;
1044 }
1045
1046 int ff_alloc_packet(AVPacket *avpkt, int size)
1047 {
1048 if (size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE)
1049 return AVERROR(EINVAL);
1050
1051 if (avpkt->data) {
1052 AVBufferRef *buf = avpkt->buf;
1053 #if FF_API_DESTRUCT_PACKET
1054 void *destruct = avpkt->destruct;
1055 #endif
1056
1057 if (avpkt->size < size)
1058 return AVERROR(EINVAL);
1059
1060 av_init_packet(avpkt);
1061 #if FF_API_DESTRUCT_PACKET
1062 avpkt->destruct = destruct;
1063 #endif
1064 avpkt->buf = buf;
1065 avpkt->size = size;
1066 return 0;
1067 } else {
1068 return av_new_packet(avpkt, size);
1069 }
1070 }
1071
1072 /**
1073 * Pad last frame with silence.
1074 */
1075 static int pad_last_frame(AVCodecContext *s, AVFrame **dst, const AVFrame *src)
1076 {
1077 AVFrame *frame = NULL;
1078 uint8_t *buf = NULL;
1079 int ret;
1080
1081 if (!(frame = avcodec_alloc_frame()))
1082 return AVERROR(ENOMEM);
1083 *frame = *src;
1084
1085 if ((ret = av_samples_get_buffer_size(&frame->linesize[0], s->channels,
1086 s->frame_size, s->sample_fmt, 0)) < 0)
1087 goto fail;
1088
1089 if (!(buf = av_malloc(ret))) {
1090 ret = AVERROR(ENOMEM);
1091 goto fail;
1092 }
1093
1094 frame->nb_samples = s->frame_size;
1095 if ((ret = avcodec_fill_audio_frame(frame, s->channels, s->sample_fmt,
1096 buf, ret, 0)) < 0)
1097 goto fail;
1098 if ((ret = av_samples_copy(frame->extended_data, src->extended_data, 0, 0,
1099 src->nb_samples, s->channels, s->sample_fmt)) < 0)
1100 goto fail;
1101 if ((ret = av_samples_set_silence(frame->extended_data, src->nb_samples,
1102 frame->nb_samples - src->nb_samples,
1103 s->channels, s->sample_fmt)) < 0)
1104 goto fail;
1105
1106 *dst = frame;
1107
1108 return 0;
1109
1110 fail:
1111 if (frame->extended_data != frame->data)
1112 av_freep(&frame->extended_data);
1113 av_freep(&buf);
1114 av_freep(&frame);
1115 return ret;
1116 }
1117
1118 int attribute_align_arg avcodec_encode_audio2(AVCodecContext *avctx,
1119 AVPacket *avpkt,
1120 const AVFrame *frame,
1121 int *got_packet_ptr)
1122 {
1123 AVFrame tmp;
1124 AVFrame *padded_frame = NULL;
1125 int ret;
1126 int user_packet = !!avpkt->data;
1127
1128 *got_packet_ptr = 0;
1129
1130 if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) {
1131 av_free_packet(avpkt);
1132 av_init_packet(avpkt);
1133 return 0;
1134 }
1135
1136 /* ensure that extended_data is properly set */
1137 if (frame && !frame->extended_data) {
1138 if (av_sample_fmt_is_planar(avctx->sample_fmt) &&
1139 avctx->channels > AV_NUM_DATA_POINTERS) {
1140 av_log(avctx, AV_LOG_ERROR, "Encoding to a planar sample format, "
1141 "with more than %d channels, but extended_data is not set.\n",
1142 AV_NUM_DATA_POINTERS);
1143 return AVERROR(EINVAL);
1144 }
1145 av_log(avctx, AV_LOG_WARNING, "extended_data is not set.\n");
1146
1147 tmp = *frame;
1148 tmp.extended_data = tmp.data;
1149 frame = &tmp;
1150 }
1151
1152 /* check for valid frame size */
1153 if (frame) {
1154 if (avctx->codec->capabilities & CODEC_CAP_SMALL_LAST_FRAME) {
1155 if (frame->nb_samples > avctx->frame_size)
1156 return AVERROR(EINVAL);
1157 } else if (!(avctx->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)) {
1158 if (frame->nb_samples < avctx->frame_size &&
1159 !avctx->internal->last_audio_frame) {
1160 ret = pad_last_frame(avctx, &padded_frame, frame);
1161 if (ret < 0)
1162 return ret;
1163
1164 frame = padded_frame;
1165 avctx->internal->last_audio_frame = 1;
1166 }
1167
1168 if (frame->nb_samples != avctx->frame_size) {
1169 ret = AVERROR(EINVAL);
1170 goto end;
1171 }
1172 }
1173 }
1174
1175 ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
1176 if (!ret) {
1177 if (*got_packet_ptr) {
1178 if (!(avctx->codec->capabilities & CODEC_CAP_DELAY)) {
1179 if (avpkt->pts == AV_NOPTS_VALUE)
1180 avpkt->pts = frame->pts;
1181 if (!avpkt->duration)
1182 avpkt->duration = ff_samples_to_time_base(avctx,
1183 frame->nb_samples);
1184 }
1185 avpkt->dts = avpkt->pts;
1186 } else {
1187 avpkt->size = 0;
1188 }
1189
1190 if (!user_packet && avpkt->size) {
1191 ret = av_buffer_realloc(&avpkt->buf, avpkt->size);
1192 if (ret >= 0)
1193 avpkt->data = avpkt->buf->data;
1194 }
1195
1196 avctx->frame_number++;
1197 }
1198
1199 if (ret < 0 || !*got_packet_ptr) {
1200 av_free_packet(avpkt);
1201 av_init_packet(avpkt);
1202 goto end;
1203 }
1204
1205 /* NOTE: if we add any audio encoders which output non-keyframe packets,
1206 * this needs to be moved to the encoders, but for now we can do it
1207 * here to simplify things */
1208 avpkt->flags |= AV_PKT_FLAG_KEY;
1209
1210 end:
1211 if (padded_frame) {
1212 av_freep(&padded_frame->data[0]);
1213 if (padded_frame->extended_data != padded_frame->data)
1214 av_freep(&padded_frame->extended_data);
1215 av_freep(&padded_frame);
1216 }
1217
1218 return ret;
1219 }
1220
1221 #if FF_API_OLD_ENCODE_AUDIO
1222 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx,
1223 uint8_t *buf, int buf_size,
1224 const short *samples)
1225 {
1226 AVPacket pkt;
1227 AVFrame frame0 = { { 0 } };
1228 AVFrame *frame;
1229 int ret, samples_size, got_packet;
1230
1231 av_init_packet(&pkt);
1232 pkt.data = buf;
1233 pkt.size = buf_size;
1234
1235 if (samples) {
1236 frame = &frame0;
1237 avcodec_get_frame_defaults(frame);
1238
1239 if (avctx->frame_size) {
1240 frame->nb_samples = avctx->frame_size;
1241 } else {
1242 /* if frame_size is not set, the number of samples must be
1243 * calculated from the buffer size */
1244 int64_t nb_samples;
1245 if (!av_get_bits_per_sample(avctx->codec_id)) {
1246 av_log(avctx, AV_LOG_ERROR, "avcodec_encode_audio() does not "
1247 "support this codec\n");
1248 return AVERROR(EINVAL);
1249 }
1250 nb_samples = (int64_t)buf_size * 8 /
1251 (av_get_bits_per_sample(avctx->codec_id) *
1252 avctx->channels);
1253 if (nb_samples >= INT_MAX)
1254 return AVERROR(EINVAL);
1255 frame->nb_samples = nb_samples;
1256 }
1257
1258 /* it is assumed that the samples buffer is large enough based on the
1259 * relevant parameters */
1260 samples_size = av_samples_get_buffer_size(NULL, avctx->channels,
1261 frame->nb_samples,
1262 avctx->sample_fmt, 1);
1263 if ((ret = avcodec_fill_audio_frame(frame, avctx->channels,
1264 avctx->sample_fmt,
1265 (const uint8_t *)samples,
1266 samples_size, 1)))
1267 return ret;
1268
1269 /* fabricate frame pts from sample count.
1270 * this is needed because the avcodec_encode_audio() API does not have
1271 * a way for the user to provide pts */
1272 frame->pts = ff_samples_to_time_base(avctx,
1273 avctx->internal->sample_count);
1274 avctx->internal->sample_count += frame->nb_samples;
1275 } else {
1276 frame = NULL;
1277 }
1278
1279 got_packet = 0;
1280 ret = avcodec_encode_audio2(avctx, &pkt, frame, &got_packet);
1281 if (!ret && got_packet && avctx->coded_frame) {
1282 avctx->coded_frame->pts = pkt.pts;
1283 avctx->coded_frame->key_frame = !!(pkt.flags & AV_PKT_FLAG_KEY);
1284 }
1285 /* free any side data since we cannot return it */
1286 if (pkt.side_data_elems > 0) {
1287 int i;
1288 for (i = 0; i < pkt.side_data_elems; i++)
1289 av_free(pkt.side_data[i].data);
1290 av_freep(&pkt.side_data);
1291 pkt.side_data_elems = 0;
1292 }
1293
1294 if (frame && frame->extended_data != frame->data)
1295 av_free(frame->extended_data);
1296
1297 return ret ? ret : pkt.size;
1298 }
1299
1300 #endif
1301
1302 #if FF_API_OLD_ENCODE_VIDEO
1303 int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1304 const AVFrame *pict)
1305 {
1306 AVPacket pkt;
1307 int ret, got_packet = 0;
1308
1309 if (buf_size < FF_MIN_BUFFER_SIZE) {
1310 av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
1311 return -1;
1312 }
1313
1314 av_init_packet(&pkt);
1315 pkt.data = buf;
1316 pkt.size = buf_size;
1317
1318 ret = avcodec_encode_video2(avctx, &pkt, pict, &got_packet);
1319 if (!ret && got_packet && avctx->coded_frame) {
1320 avctx->coded_frame->pts = pkt.pts;
1321 avctx->coded_frame->key_frame = !!(pkt.flags & AV_PKT_FLAG_KEY);
1322 }
1323
1324 /* free any side data since we cannot return it */
1325 if (pkt.side_data_elems > 0) {
1326 int i;
1327 for (i = 0; i < pkt.side_data_elems; i++)
1328 av_free(pkt.side_data[i].data);
1329 av_freep(&pkt.side_data);
1330 pkt.side_data_elems = 0;
1331 }
1332
1333 return ret ? ret : pkt.size;
1334 }
1335
1336 #endif
1337
1338 int attribute_align_arg avcodec_encode_video2(AVCodecContext *avctx,
1339 AVPacket *avpkt,
1340 const AVFrame *frame,
1341 int *got_packet_ptr)
1342 {
1343 int ret;
1344 int user_packet = !!avpkt->data;
1345
1346 *got_packet_ptr = 0;
1347
1348 if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) {
1349 av_free_packet(avpkt);
1350 av_init_packet(avpkt);
1351 avpkt->size = 0;
1352 return 0;
1353 }
1354
1355 if (av_image_check_size(avctx->width, avctx->height, 0, avctx))
1356 return AVERROR(EINVAL);
1357
1358 av_assert0(avctx->codec->encode2);
1359
1360 ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
1361 if (!ret) {
1362 if (!*got_packet_ptr)
1363 avpkt->size = 0;
1364 else if (!(avctx->codec->capabilities & CODEC_CAP_DELAY))
1365 avpkt->pts = avpkt->dts = frame->pts;
1366
1367 if (!user_packet && avpkt->size) {
1368 ret = av_buffer_realloc(&avpkt->buf, avpkt->size);
1369 if (ret >= 0)
1370 avpkt->data = avpkt->buf->data;
1371 }
1372
1373 avctx->frame_number++;
1374 }
1375
1376 if (ret < 0 || !*got_packet_ptr)
1377 av_free_packet(avpkt);
1378
1379 emms_c();
1380 return ret;
1381 }
1382
1383 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1384 const AVSubtitle *sub)
1385 {
1386 int ret;
1387 if (sub->start_display_time) {
1388 av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
1389 return -1;
1390 }
1391 if (sub->num_rects == 0 || !sub->rects)
1392 return -1;
1393 ret = avctx->codec->encode_sub(avctx, buf, buf_size, sub);
1394 avctx->frame_number++;
1395 return ret;
1396 }
1397
1398 static void apply_param_change(AVCodecContext *avctx, AVPacket *avpkt)
1399 {
1400 int size = 0;
1401 const uint8_t *data;
1402 uint32_t flags;
1403
1404 if (!(avctx->codec->capabilities & CODEC_CAP_PARAM_CHANGE))
1405 return;
1406
1407 data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size);
1408 if (!data || size < 4)
1409 return;
1410 flags = bytestream_get_le32(&data);
1411 size -= 4;
1412 if (size < 4) /* Required for any of the changes */
1413 return;
1414 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) {
1415 avctx->channels = bytestream_get_le32(&data);
1416 size -= 4;
1417 }
1418 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) {
1419 if (size < 8)
1420 return;
1421 avctx->channel_layout = bytestream_get_le64(&data);
1422 size -= 8;
1423 }
1424 if (size < 4)
1425 return;
1426 if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) {
1427 avctx->sample_rate = bytestream_get_le32(&data);
1428 size -= 4;
1429 }
1430 if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) {
1431 if (size < 8)
1432 return;
1433 avctx->width = bytestream_get_le32(&data);
1434 avctx->height = bytestream_get_le32(&data);
1435 avcodec_set_dimensions(avctx, avctx->width, avctx->height);
1436 size -= 8;
1437 }
1438 }
1439
1440 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
1441 int *got_picture_ptr,
1442 AVPacket *avpkt)
1443 {
1444 AVCodecInternal *avci = avctx->internal;
1445 int ret;
1446
1447 *got_picture_ptr = 0;
1448 if ((avctx->coded_width || avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
1449 return -1;
1450
1451 avctx->pkt = avpkt;
1452 apply_param_change(avctx, avpkt);
1453
1454 avcodec_get_frame_defaults(picture);
1455
1456 if (!avctx->refcounted_frames)
1457 av_frame_unref(&avci->to_free);
1458
1459 if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type & FF_THREAD_FRAME)) {
1460 if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
1461 ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr,
1462 avpkt);
1463 else {
1464 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
1465 avpkt);
1466 picture->pkt_dts = avpkt->dts;
1467 /* get_buffer is supposed to set frame parameters */
1468 if (!(avctx->codec->capabilities & CODEC_CAP_DR1)) {
1469 picture->sample_aspect_ratio = avctx->sample_aspect_ratio;
1470 picture->width = avctx->width;
1471 picture->height = avctx->height;
1472 picture->format = avctx->pix_fmt;
1473 }
1474 }
1475
1476 emms_c(); //needed to avoid an emms_c() call before every return;
1477
1478 if (ret < 0 && picture->data[0])
1479 av_frame_unref(picture);
1480
1481 if (*got_picture_ptr) {
1482 if (!avctx->refcounted_frames) {
1483 avci->to_free = *picture;
1484 avci->to_free.extended_data = avci->to_free.data;
1485 }
1486
1487 avctx->frame_number++;
1488 }
1489 } else
1490 ret = 0;
1491
1492 /* many decoders assign whole AVFrames, thus overwriting extended_data;
1493 * make sure it's set correctly */
1494 picture->extended_data = picture->data;
1495
1496 return ret;
1497 }
1498
1499 #if FF_API_OLD_DECODE_AUDIO
1500 int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
1501 int *frame_size_ptr,
1502 AVPacket *avpkt)
1503 {
1504 AVFrame frame = { { 0 } };
1505 int ret, got_frame = 0;
1506
1507 if (avctx->get_buffer != avcodec_default_get_buffer) {
1508 av_log(avctx, AV_LOG_ERROR, "Custom get_buffer() for use with"
1509 "avcodec_decode_audio3() detected. Overriding with avcodec_default_get_buffer\n");
1510 av_log(avctx, AV_LOG_ERROR, "Please port your application to "
1511 "avcodec_decode_audio4()\n");
1512 avctx->get_buffer = avcodec_default_get_buffer;
1513 }
1514
1515 ret = avcodec_decode_audio4(avctx, &frame, &got_frame, avpkt);
1516
1517 if (ret >= 0 && got_frame) {
1518 int ch, plane_size;
1519 int planar = av_sample_fmt_is_planar(avctx->sample_fmt);
1520 int data_size = av_samples_get_buffer_size(&plane_size, avctx->channels,
1521 frame.nb_samples,
1522 avctx->sample_fmt, 1);
1523 if (*frame_size_ptr < data_size) {
1524 av_log(avctx, AV_LOG_ERROR, "output buffer size is too small for "
1525 "the current frame (%d < %d)\n", *frame_size_ptr, data_size);
1526 return AVERROR(EINVAL);
1527 }
1528
1529 memcpy(samples, frame.extended_data[0], plane_size);
1530
1531 if (planar && avctx->channels > 1) {
1532 uint8_t *out = ((uint8_t *)samples) + plane_size;
1533 for (ch = 1; ch < avctx->channels; ch++) {
1534 memcpy(out, frame.extended_data[ch], plane_size);
1535 out += plane_size;
1536 }
1537 }
1538 *frame_size_ptr = data_size;
1539 } else {
1540 *frame_size_ptr = 0;
1541 }
1542 return ret;
1543 }
1544
1545 #endif
1546
1547 int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
1548 AVFrame *frame,
1549 int *got_frame_ptr,
1550 AVPacket *avpkt)
1551 {
1552 AVCodecInternal *avci = avctx->internal;
1553 int planar, channels;
1554 int ret = 0;
1555
1556 *got_frame_ptr = 0;
1557
1558 avctx->pkt = avpkt;
1559
1560 if (!avpkt->data && avpkt->size) {
1561 av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n");
1562 return AVERROR(EINVAL);
1563 }
1564
1565 apply_param_change(avctx, avpkt);
1566
1567 avcodec_get_frame_defaults(frame);
1568
1569 if (!avctx->refcounted_frames)
1570 av_frame_unref(&avci->to_free);
1571
1572 if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size) {
1573 ret = avctx->codec->decode(avctx, frame, got_frame_ptr, avpkt);
1574 if (ret >= 0 && *got_frame_ptr) {
1575 avctx->frame_number++;
1576 frame->pkt_dts = avpkt->dts;
1577 if (frame->format == AV_SAMPLE_FMT_NONE)
1578 frame->format = avctx->sample_fmt;
1579
1580 if (!avctx->refcounted_frames) {
1581 avci->to_free = *frame;
1582 avci->to_free.extended_data = avci->to_free.data;
1583 }
1584 }
1585
1586 if (ret < 0 && frame->data[0])
1587 av_frame_unref(frame);
1588 }
1589
1590 /* many decoders assign whole AVFrames, thus overwriting extended_data;
1591 * make sure it's set correctly; assume decoders that actually use
1592 * extended_data are doing it correctly */
1593 planar = av_sample_fmt_is_planar(frame->format);
1594 channels = av_get_channel_layout_nb_channels(frame->channel_layout);
1595 if (!(planar && channels > AV_NUM_DATA_POINTERS))
1596 frame->extended_data = frame->data;
1597
1598 return ret;
1599 }
1600
1601 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
1602 int *got_sub_ptr,
1603 AVPacket *avpkt)
1604 {
1605 int ret;
1606
1607 avctx->pkt = avpkt;
1608 *got_sub_ptr = 0;
1609 ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
1610 if (*got_sub_ptr)
1611 avctx->frame_number++;
1612 return ret;
1613 }
1614
1615 void avsubtitle_free(AVSubtitle *sub)
1616 {
1617 int i;
1618
1619 for (i = 0; i < sub->num_rects; i++) {
1620 av_freep(&sub->rects[i]->pict.data[0]);
1621 av_freep(&sub->rects[i]->pict.data[1]);
1622 av_freep(&sub->rects[i]->pict.data[2]);
1623 av_freep(&sub->rects[i]->pict.data[3]);
1624 av_freep(&sub->rects[i]->text);
1625 av_freep(&sub->rects[i]->ass);
1626 av_freep(&sub->rects[i]);
1627 }
1628
1629 av_freep(&sub->rects);
1630
1631 memset(sub, 0, sizeof(AVSubtitle));
1632 }
1633
1634 av_cold int avcodec_close(AVCodecContext *avctx)
1635 {
1636 /* If there is a user-supplied mutex locking routine, call it. */
1637 if (ff_lockmgr_cb) {
1638 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
1639 return -1;
1640 }
1641
1642 entangled_thread_counter++;
1643 if (entangled_thread_counter != 1) {
1644 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
1645 entangled_thread_counter--;
1646 return -1;
1647 }
1648
1649 if (avcodec_is_open(avctx)) {
1650 FramePool *pool = avctx->internal->pool;
1651 int i;
1652 if (HAVE_THREADS && avctx->thread_opaque)
1653 ff_thread_free(avctx);
1654 if (avctx->codec && avctx->codec->close)
1655 avctx->codec->close(avctx);
1656 avctx->coded_frame = NULL;
1657 if (!avctx->refcounted_frames)
1658 av_frame_unref(&avctx->internal->to_free);
1659 for (i = 0; i < FF_ARRAY_ELEMS(pool->pools); i++)
1660 av_buffer_pool_uninit(&pool->pools[i]);
1661 av_freep(&avctx->internal->pool);
1662 av_freep(&avctx->internal);
1663 }
1664
1665 if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)
1666 av_opt_free(avctx->priv_data);
1667 av_opt_free(avctx);
1668 av_freep(&avctx->priv_data);
1669 if (av_codec_is_encoder(avctx->codec))
1670 av_freep(&avctx->extradata);
1671 avctx->codec = NULL;
1672 avctx->active_thread_type = 0;
1673 entangled_thread_counter--;
1674
1675 /* Release any user-supplied mutex. */
1676 if (ff_lockmgr_cb) {
1677 (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
1678 }
1679 return 0;
1680 }
1681
1682 static AVCodec *find_encdec(enum AVCodecID id, int encoder)
1683 {
1684 AVCodec *p, *experimental = NULL;
1685 p = first_avcodec;
1686 while (p) {
1687 if ((encoder ? av_codec_is_encoder(p) : av_codec_is_decoder(p)) &&
1688 p->id == id) {
1689 if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
1690 experimental = p;
1691 } else
1692 return p;
1693 }
1694 p = p->next;
1695 }
1696 return experimental;
1697 }
1698
1699 AVCodec *avcodec_find_encoder(enum AVCodecID id)
1700 {
1701 return find_encdec(id, 1);
1702 }
1703
1704 AVCodec *avcodec_find_encoder_by_name(const char *name)
1705 {
1706 AVCodec *p;
1707 if (!name)
1708 return NULL;
1709 p = first_avcodec;
1710 while (p) {
1711 if (av_codec_is_encoder(p) && strcmp(name, p->name) == 0)
1712 return p;
1713 p = p->next;
1714 }
1715 return NULL;
1716 }
1717
1718 AVCodec *avcodec_find_decoder(enum AVCodecID id)
1719 {
1720 return find_encdec(id, 0);
1721 }
1722
1723 AVCodec *avcodec_find_decoder_by_name(const char *name)
1724 {
1725 AVCodec *p;
1726 if (!name)
1727 return NULL;
1728 p = first_avcodec;
1729 while (p) {
1730 if (av_codec_is_decoder(p) && strcmp(name, p->name) == 0)
1731 return p;
1732 p = p->next;
1733 }
1734 return NULL;
1735 }
1736
1737 static int get_bit_rate(AVCodecContext *ctx)
1738 {
1739 int bit_rate;
1740 int bits_per_sample;
1741
1742 switch (ctx->codec_type) {
1743 case AVMEDIA_TYPE_VIDEO:
1744 case AVMEDIA_TYPE_DATA:
1745 case AVMEDIA_TYPE_SUBTITLE:
1746 case AVMEDIA_TYPE_ATTACHMENT:
1747 bit_rate = ctx->bit_rate;
1748 break;
1749 case AVMEDIA_TYPE_AUDIO:
1750 bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
1751 bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
1752 break;
1753 default:
1754 bit_rate = 0;
1755 break;
1756 }
1757 return bit_rate;
1758 }
1759
1760 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
1761 {
1762 int i, len, ret = 0;
1763
1764 #define TAG_PRINT(x) \
1765 (((x) >= '0' && (x) <= '9') || \
1766 ((x) >= 'a' && (x) <= 'z') || ((x) >= 'A' && (x) <= 'Z') || \
1767 ((x) == '.' || (x) == ' '))
1768
1769 for (i = 0; i < 4; i++) {
1770 len = snprintf(buf, buf_size,
1771 TAG_PRINT(codec_tag & 0xFF) ? "%c" : "[%d]", codec_tag & 0xFF);
1772 buf += len;
1773 buf_size = buf_size > len ? buf_size - len : 0;
1774 ret += len;
1775 codec_tag >>= 8;
1776 }
1777 return ret;
1778 }
1779
1780 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
1781 {
1782 const char *codec_name;
1783 const char *profile = NULL;
1784 const AVCodec *p;
1785 char buf1[32];
1786 int bitrate;
1787 AVRational display_aspect_ratio;
1788
1789 if (enc->codec)
1790 p = enc->codec;
1791 else if (encode)
1792 p = avcodec_find_encoder(enc->codec_id);
1793 else
1794 p = avcodec_find_decoder(enc->codec_id);
1795
1796 if (p) {
1797 codec_name = p->name;
1798 profile = av_get_profile_name(p, enc->profile);
1799 } else if (enc->codec_id == AV_CODEC_ID_MPEG2TS) {
1800 /* fake mpeg2 transport stream codec (currently not
1801 * registered) */
1802 codec_name = "mpeg2ts";
1803 } else if (enc->codec_name[0] != '\0') {
1804 codec_name = enc->codec_name;
1805 } else {
1806 /* output avi tags */
1807 char tag_buf[32];
1808 av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
1809 snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
1810 codec_name = buf1;
1811 }
1812
1813 switch (enc->codec_type) {
1814 case AVMEDIA_TYPE_VIDEO:
1815 snprintf(buf, buf_size,
1816 "Video: %s%s",
1817 codec_name, enc->mb_decision ? " (hq)" : "");
1818 if (profile)
1819 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1820 " (%s)", profile);
1821 if (enc->pix_fmt != AV_PIX_FMT_NONE) {
1822 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1823 ", %s",
1824 av_get_pix_fmt_name(enc->pix_fmt));
1825 }
1826 if (enc->width) {
1827 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1828 ", %dx%d",
1829 enc->width, enc->height);
1830 if (enc->sample_aspect_ratio.num) {
1831 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1832 enc->width * enc->sample_aspect_ratio.num,
1833 enc->height * enc->sample_aspect_ratio.den,
1834 1024 * 1024);
1835 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1836 " [PAR %d:%d DAR %d:%d]",
1837 enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
1838 display_aspect_ratio.num, display_aspect_ratio.den);
1839 }
1840 if (av_log_get_level() >= AV_LOG_DEBUG) {
1841 int g = av_gcd(enc->time_base.num, enc->time_base.den);
1842 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1843 ", %d/%d",
1844 enc->time_base.num / g, enc->time_base.den / g);
1845 }
1846 }
1847 if (encode) {
1848 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1849 ", q=%d-%d", enc->qmin, enc->qmax);
1850 }
1851 break;
1852 case AVMEDIA_TYPE_AUDIO:
1853 snprintf(buf, buf_size,
1854 "Audio: %s",
1855 codec_name);
1856 if (profile)
1857 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1858 " (%s)", profile);
1859 if (enc->sample_rate) {
1860 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1861 ", %d Hz", enc->sample_rate);
1862 }
1863 av_strlcat(buf, ", ", buf_size);
1864 av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
1865 if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {
1866 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1867 ", %s", av_get_sample_fmt_name(enc->sample_fmt));
1868 }
1869 break;
1870 case AVMEDIA_TYPE_DATA:
1871 snprintf(buf, buf_size, "Data: %s", codec_name);
1872 break;
1873 case AVMEDIA_TYPE_SUBTITLE:
1874 snprintf(buf, buf_size, "Subtitle: %s", codec_name);
1875 break;
1876 case AVMEDIA_TYPE_ATTACHMENT:
1877 snprintf(buf, buf_size, "Attachment: %s", codec_name);
1878 break;
1879 default:
1880 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
1881 return;
1882 }
1883 if (encode) {
1884 if (enc->flags & CODEC_FLAG_PASS1)
1885 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1886 ", pass 1");
1887 if (enc->flags & CODEC_FLAG_PASS2)
1888 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1889 ", pass 2");
1890 }
1891 bitrate = get_bit_rate(enc);
1892 if (bitrate != 0) {
1893 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1894 ", %d kb/s", bitrate / 1000);
1895 }
1896 }
1897
1898 const char *av_get_profile_name(const AVCodec *codec, int profile)
1899 {
1900 const AVProfile *p;
1901 if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)
1902 return NULL;
1903
1904 for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
1905 if (p->profile == profile)
1906 return p->name;
1907
1908 return NULL;
1909 }
1910
1911 unsigned avcodec_version(void)
1912 {
1913 return LIBAVCODEC_VERSION_INT;
1914 }
1915
1916 const char *avcodec_configuration(void)
1917 {
1918 return LIBAV_CONFIGURATION;
1919 }
1920
1921 const char *avcodec_license(void)
1922 {
1923 #define LICENSE_PREFIX "libavcodec license: "
1924 return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
1925 }
1926
1927 void avcodec_flush_buffers(AVCodecContext *avctx)
1928 {
1929 if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
1930 ff_thread_flush(avctx);
1931 else if (avctx->codec->flush)
1932 avctx->codec->flush(avctx);
1933 }
1934
1935 int av_get_exact_bits_per_sample(enum AVCodecID codec_id)
1936 {
1937 switch (codec_id) {
1938 case AV_CODEC_ID_ADPCM_CT:
1939 case AV_CODEC_ID_ADPCM_IMA_APC:
1940 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
1941 case AV_CODEC_ID_ADPCM_IMA_WS:
1942 case AV_CODEC_ID_ADPCM_G722:
1943 case AV_CODEC_ID_ADPCM_YAMAHA:
1944 return 4;
1945 case AV_CODEC_ID_PCM_ALAW:
1946 case AV_CODEC_ID_PCM_MULAW:
1947 case AV_CODEC_ID_PCM_S8:
1948 case AV_CODEC_ID_PCM_U8:
1949 case AV_CODEC_ID_PCM_ZORK:
1950 return 8;
1951 case AV_CODEC_ID_PCM_S16BE:
1952 case AV_CODEC_ID_PCM_S16LE:
1953 case AV_CODEC_ID_PCM_S16LE_PLANAR:
1954 case AV_CODEC_ID_PCM_U16BE:
1955 case AV_CODEC_ID_PCM_U16LE:
1956 return 16;
1957 case AV_CODEC_ID_PCM_S24DAUD:
1958 case AV_CODEC_ID_PCM_S24BE:
1959 case AV_CODEC_ID_PCM_S24LE:
1960 case AV_CODEC_ID_PCM_U24BE:
1961 case AV_CODEC_ID_PCM_U24LE:
1962 return 24;
1963 case AV_CODEC_ID_PCM_S32BE:
1964 case AV_CODEC_ID_PCM_S32LE:
1965 case AV_CODEC_ID_PCM_U32BE:
1966 case AV_CODEC_ID_PCM_U32LE:
1967 case AV_CODEC_ID_PCM_F32BE:
1968 case AV_CODEC_ID_PCM_F32LE:
1969 return 32;
1970 case AV_CODEC_ID_PCM_F64BE:
1971 case AV_CODEC_ID_PCM_F64LE:
1972 return 64;
1973 default:
1974 return 0;
1975 }
1976 }
1977
1978 int av_get_bits_per_sample(enum AVCodecID codec_id)
1979 {
1980 switch (codec_id) {
1981 case AV_CODEC_ID_ADPCM_SBPRO_2:
1982 return 2;
1983 case AV_CODEC_ID_ADPCM_SBPRO_3:
1984 return 3;
1985 case AV_CODEC_ID_ADPCM_SBPRO_4:
1986 case AV_CODEC_ID_ADPCM_IMA_WAV:
1987 case AV_CODEC_ID_ADPCM_IMA_QT:
1988 case AV_CODEC_ID_ADPCM_SWF:
1989 case AV_CODEC_ID_ADPCM_MS:
1990 return 4;
1991 default:
1992 return av_get_exact_bits_per_sample(codec_id);
1993 }
1994 }
1995
1996 int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
1997 {
1998 int id, sr, ch, ba, tag, bps;
1999
2000 id = avctx->codec_id;
2001 sr = avctx->sample_rate;
2002 ch = avctx->channels;
2003 ba = avctx->block_align;
2004 tag = avctx->codec_tag;
2005 bps = av_get_exact_bits_per_sample(avctx->codec_id);
2006
2007 /* codecs with an exact constant bits per sample */
2008 if (bps > 0 && ch > 0 && frame_bytes > 0)
2009 return (frame_bytes * 8) / (bps * ch);
2010 bps = avctx->bits_per_coded_sample;
2011
2012 /* codecs with a fixed packet duration */
2013 switch (id) {
2014 case AV_CODEC_ID_ADPCM_ADX: return 32;
2015 case AV_CODEC_ID_ADPCM_IMA_QT: return 64;
2016 case AV_CODEC_ID_ADPCM_EA_XAS: return 128;
2017 case AV_CODEC_ID_AMR_NB:
2018 case AV_CODEC_ID_GSM:
2019 case AV_CODEC_ID_QCELP:
2020 case AV_CODEC_ID_RA_144:
2021 case AV_CODEC_ID_RA_288: return 160;
2022 case AV_CODEC_ID_IMC: return 256;
2023 case AV_CODEC_ID_AMR_WB:
2024 case AV_CODEC_ID_GSM_MS: return 320;
2025 case AV_CODEC_ID_MP1: return 384;
2026 case AV_CODEC_ID_ATRAC1: return 512;
2027 case AV_CODEC_ID_ATRAC3: return 1024;
2028 case AV_CODEC_ID_MP2:
2029 case AV_CODEC_ID_MUSEPACK7: return 1152;
2030 case AV_CODEC_ID_AC3: return 1536;
2031 }
2032
2033 if (sr > 0) {
2034 /* calc from sample rate */
2035 if (id == AV_CODEC_ID_TTA)
2036 return 256 * sr / 245;
2037
2038 if (ch > 0) {
2039 /* calc from sample rate and channels */
2040 if (id == AV_CODEC_ID_BINKAUDIO_DCT)
2041 return (480 << (sr / 22050)) / ch;
2042 }
2043 }
2044
2045 if (ba > 0) {
2046 /* calc from block_align */
2047 if (id == AV_CODEC_ID_SIPR) {
2048 switch (ba) {
2049 case 20: return 160;
2050 case 19: return 144;
2051 case 29: return 288;
2052 case 37: return 480;
2053 }
2054 } else if (id == AV_CODEC_ID_ILBC) {
2055 switch (ba) {
2056 case 38: return 160;
2057 case 50: return 240;
2058 }
2059 }
2060 }
2061
2062 if (frame_bytes > 0) {
2063 /* calc from frame_bytes only */
2064 if (id == AV_CODEC_ID_TRUESPEECH)
2065 return 240 * (frame_bytes / 32);
2066 if (id == AV_CODEC_ID_NELLYMOSER)
2067 return 256 * (frame_bytes / 64);
2068
2069 if (bps > 0) {
2070 /* calc from frame_bytes and bits_per_coded_sample */
2071 if (id == AV_CODEC_ID_ADPCM_G726)
2072 return frame_bytes * 8 / bps;
2073 }
2074
2075 if (ch > 0) {
2076 /* calc from frame_bytes and channels */
2077 switch (id) {
2078 case AV_CODEC_ID_ADPCM_4XM:
2079 case AV_CODEC_ID_ADPCM_IMA_ISS:
2080 return (frame_bytes - 4 * ch) * 2 / ch;
2081 case AV_CODEC_ID_ADPCM_IMA_SMJPEG:
2082 return (frame_bytes - 4) * 2 / ch;
2083 case AV_CODEC_ID_ADPCM_IMA_AMV:
2084 return (frame_bytes - 8) * 2 / ch;
2085 case AV_CODEC_ID_ADPCM_XA:
2086 return (frame_bytes / 128) * 224 / ch;
2087 case AV_CODEC_ID_INTERPLAY_DPCM:
2088 return (frame_bytes - 6 - ch) / ch;
2089 case AV_CODEC_ID_ROQ_DPCM:
2090 return (frame_bytes - 8) / ch;
2091 case AV_CODEC_ID_XAN_DPCM:
2092 return (frame_bytes - 2 * ch) / ch;
2093 case AV_CODEC_ID_MACE3:
2094 return 3 * frame_bytes / ch;
2095 case AV_CODEC_ID_MACE6:
2096 return 6 * frame_bytes / ch;
2097 case AV_CODEC_ID_PCM_LXF:
2098 return 2 * (frame_bytes / (5 * ch));
2099 }
2100
2101 if (tag) {
2102 /* calc from frame_bytes, channels, and codec_tag */
2103 if (id == AV_CODEC_ID_SOL_DPCM) {
2104 if (tag == 3)
2105 return frame_bytes / ch;
2106 else
2107 return frame_bytes * 2 / ch;
2108 }
2109 }
2110
2111 if (ba > 0) {
2112 /* calc from frame_bytes, channels, and block_align */
2113 int blocks = frame_bytes / ba;
2114 switch (avctx->codec_id) {
2115 case AV_CODEC_ID_ADPCM_IMA_WAV:
2116 return blocks * (1 + (ba - 4 * ch) / (4 * ch) * 8);
2117 case AV_CODEC_ID_ADPCM_IMA_DK3:
2118 return blocks * (((ba - 16) * 2 / 3 * 4) / ch);
2119 case AV_CODEC_ID_ADPCM_IMA_DK4:
2120 return blocks * (1 + (ba - 4 * ch) * 2 / ch);
2121 case AV_CODEC_ID_ADPCM_MS:
2122 return blocks * (2 + (ba - 7 * ch) * 2 / ch);
2123 }
2124 }
2125
2126 if (bps > 0) {
2127 /* calc from frame_bytes, channels, and bits_per_coded_sample */
2128 switch (avctx->codec_id) {
2129 case AV_CODEC_ID_PCM_DVD:
2130 return 2 * (frame_bytes / ((bps * 2 / 8) * ch));
2131 case AV_CODEC_ID_PCM_BLURAY:
2132 return frame_bytes / ((FFALIGN(ch, 2) * bps) / 8);
2133 case AV_CODEC_ID_S302M:
2134 return 2 * (frame_bytes / ((bps + 4) / 4)) / ch;
2135 }
2136 }
2137 }
2138 }
2139
2140 return 0;
2141 }
2142
2143 #if !HAVE_THREADS
2144 int ff_thread_init(AVCodecContext *s)
2145 {
2146 return -1;
2147 }
2148
2149 #endif
2150
2151 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
2152 {
2153 unsigned int n = 0;
2154
2155 while (v >= 0xff) {
2156 *s++ = 0xff;
2157 v -= 0xff;
2158 n++;
2159 }
2160 *s = v;
2161 n++;
2162 return n;
2163 }
2164
2165 int ff_match_2uint16(const uint16_t(*tab)[2], int size, int a, int b)
2166 {
2167 int i;
2168 for (i = 0; i < size && !(tab[i][0] == a && tab[i][1] == b); i++) ;
2169 return i;
2170 }
2171
2172 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
2173 {
2174 av_log(avc, AV_LOG_WARNING, "%s is not implemented. Update your Libav "
2175 "version to the newest one from Git. If the problem still "
2176 "occurs, it means that your file has a feature which has not "
2177 "been implemented.\n", feature);
2178 if(want_sample)
2179 av_log_ask_for_sample(avc, NULL);
2180 }
2181
2182 void av_log_ask_for_sample(void *avc, const char *msg, ...)
2183 {
2184 va_list argument_list;
2185
2186 va_start(argument_list, msg);
2187
2188 if (msg)
2189 av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
2190 av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
2191 "of this file to ftp://upload.libav.org/incoming/ "
2192 "and contact the libav-devel mailing list.\n");
2193
2194 va_end(argument_list);
2195 }
2196
2197 static AVHWAccel *first_hwaccel = NULL;
2198
2199 void av_register_hwaccel(AVHWAccel *hwaccel)
2200 {
2201 AVHWAccel **p = &first_hwaccel;
2202 while (*p)
2203 p = &(*p)->next;
2204 *p = hwaccel;
2205 hwaccel->next = NULL;
2206 }
2207
2208 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
2209 {
2210 return hwaccel ? hwaccel->next : first_hwaccel;
2211 }
2212
2213 AVHWAccel *ff_find_hwaccel(enum AVCodecID codec_id, enum AVPixelFormat pix_fmt)
2214 {
2215 AVHWAccel *hwaccel = NULL;
2216
2217 while ((hwaccel = av_hwaccel_next(hwaccel)))
2218 if (hwaccel->id == codec_id
2219 && hwaccel->pix_fmt == pix_fmt)
2220 return hwaccel;
2221 return NULL;
2222 }
2223
2224 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
2225 {
2226 if (ff_lockmgr_cb) {
2227 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
2228 return -1;
2229 if (ff_lockmgr_cb(&avformat_mutex, AV_LOCK_DESTROY))
2230 return -1;
2231 }
2232
2233 ff_lockmgr_cb = cb;
2234
2235 if (ff_lockmgr_cb) {
2236 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
2237 return -1;
2238 if (ff_lockmgr_cb(&avformat_mutex, AV_LOCK_CREATE))
2239 return -1;
2240 }
2241 return 0;
2242 }
2243
2244 int avpriv_lock_avformat(void)
2245 {
2246 if (ff_lockmgr_cb) {
2247 if ((*ff_lockmgr_cb)(&avformat_mutex, AV_LOCK_OBTAIN))
2248 return -1;
2249 }
2250 return 0;
2251 }
2252
2253 int avpriv_unlock_avformat(void)
2254 {
2255 if (ff_lockmgr_cb) {
2256 if ((*ff_lockmgr_cb)(&avformat_mutex, AV_LOCK_RELEASE))
2257 return -1;
2258 }
2259 return 0;
2260 }
2261
2262 unsigned int avpriv_toupper4(unsigned int x)
2263 {
2264 return av_toupper(x & 0xFF) +
2265 (av_toupper((x >> 8) & 0xFF) << 8) +
2266 (av_toupper((x >> 16) & 0xFF) << 16) +
2267 (av_toupper((x >> 24) & 0xFF) << 24);
2268 }
2269
2270 int ff_thread_ref_frame(ThreadFrame *dst, ThreadFrame *src)
2271 {
2272 int ret;
2273
2274 dst->owner = src->owner;
2275
2276 ret = av_frame_ref(dst->f, src->f);
2277 if (ret < 0)
2278 return ret;
2279
2280 if (src->progress &&
2281 !(dst->progress = av_buffer_ref(src->progress))) {
2282 ff_thread_release_buffer(dst->owner, dst);
2283 return AVERROR(ENOMEM);
2284 }
2285
2286 return 0;
2287 }
2288
2289 #if !HAVE_THREADS
2290
2291 int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f, int flags)
2292 {
2293 f->owner = avctx;
2294 return ff_get_buffer(avctx, f, flags);
2295 }
2296
2297 void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f)
2298 {
2299 av_frame_unref(f);
2300 }
2301
2302 void ff_thread_finish_setup(AVCodecContext *avctx)
2303 {
2304 }
2305
2306 void ff_thread_report_progress(AVFrame *f, int progress, int field)
2307 {
2308 }
2309
2310 void ff_thread_await_progress(AVFrame *f, int progress, int field)
2311 {
2312 }
2313
2314 #endif
2315
2316 enum AVMediaType avcodec_get_type(enum AVCodecID codec_id)
2317 {
2318 if (codec_id <= AV_CODEC_ID_NONE)
2319 return AVMEDIA_TYPE_UNKNOWN;
2320 else if (codec_id < AV_CODEC_ID_FIRST_AUDIO)
2321 return AVMEDIA_TYPE_VIDEO;
2322 else if (codec_id < AV_CODEC_ID_FIRST_SUBTITLE)
2323 return AVMEDIA_TYPE_AUDIO;
2324 else if (codec_id < AV_CODEC_ID_FIRST_UNKNOWN)
2325 return AVMEDIA_TYPE_SUBTITLE;
2326
2327 return AVMEDIA_TYPE_UNKNOWN;
2328 }
2329
2330 int avcodec_is_open(AVCodecContext *s)
2331 {
2332 return !!s->internal;
2333 }
A couple of patches to make building with MPlayer easier