06f4fc94e4e3479f601c2eb5b9479337886dfc46
[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 "libavutil/avassert.h"
29 #include "libavutil/avstring.h"
30 #include "libavutil/channel_layout.h"
31 #include "libavutil/crc.h"
32 #include "libavutil/mathematics.h"
33 #include "libavutil/pixdesc.h"
34 #include "libavutil/imgutils.h"
35 #include "libavutil/samplefmt.h"
36 #include "libavutil/dict.h"
37 #include "avcodec.h"
38 #include "dsputil.h"
39 #include "libavutil/opt.h"
40 #include "thread.h"
41 #include "internal.h"
42 #include "bytestream.h"
43 #include <stdlib.h>
44 #include <stdarg.h>
45 #include <limits.h>
46 #include <float.h>
47
48 static int volatile entangled_thread_counter = 0;
49 static int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
50 static void *codec_mutex;
51 static void *avformat_mutex;
52
53 void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
54 {
55 if (min_size < *size)
56 return ptr;
57
58 min_size = FFMAX(17 * min_size / 16 + 32, min_size);
59
60 ptr = av_realloc(ptr, min_size);
61 /* we could set this to the unmodified min_size but this is safer
62 * if the user lost the ptr and uses NULL now
63 */
64 if (!ptr)
65 min_size = 0;
66
67 *size = min_size;
68
69 return ptr;
70 }
71
72 void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
73 {
74 void **p = ptr;
75 if (min_size < *size)
76 return;
77 min_size = FFMAX(17 * min_size / 16 + 32, min_size);
78 av_free(*p);
79 *p = av_malloc(min_size);
80 if (!*p)
81 min_size = 0;
82 *size = min_size;
83 }
84
85 void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
86 {
87 void **p = ptr;
88 if (min_size > SIZE_MAX - FF_INPUT_BUFFER_PADDING_SIZE) {
89 av_freep(p);
90 *size = 0;
91 return;
92 }
93 av_fast_malloc(p, size, min_size + FF_INPUT_BUFFER_PADDING_SIZE);
94 if (*size)
95 memset((uint8_t *)*p + min_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
96 }
97
98 /* encoder management */
99 static AVCodec *first_avcodec = NULL;
100
101 AVCodec *av_codec_next(const AVCodec *c)
102 {
103 if (c)
104 return c->next;
105 else
106 return first_avcodec;
107 }
108
109 static void avcodec_init(void)
110 {
111 static int initialized = 0;
112
113 if (initialized != 0)
114 return;
115 initialized = 1;
116
117 ff_dsputil_static_init();
118 }
119
120 int av_codec_is_encoder(const AVCodec *codec)
121 {
122 return codec && (codec->encode_sub || codec->encode2);
123 }
124
125 int av_codec_is_decoder(const AVCodec *codec)
126 {
127 return codec && codec->decode;
128 }
129
130 void avcodec_register(AVCodec *codec)
131 {
132 AVCodec **p;
133 avcodec_init();
134 p = &first_avcodec;
135 while (*p != NULL)
136 p = &(*p)->next;
137 *p = codec;
138 codec->next = NULL;
139
140 if (codec->init_static_data)
141 codec->init_static_data(codec);
142 }
143
144 unsigned avcodec_get_edge_width(void)
145 {
146 return EDGE_WIDTH;
147 }
148
149 void avcodec_set_dimensions(AVCodecContext *s, int width, int height)
150 {
151 s->coded_width = width;
152 s->coded_height = height;
153 s->width = width;
154 s->height = height;
155 }
156
157 #define INTERNAL_BUFFER_SIZE (32 + 1)
158
159 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
160 int linesize_align[AV_NUM_DATA_POINTERS])
161 {
162 int i;
163 int w_align = 1;
164 int h_align = 1;
165
166 switch (s->pix_fmt) {
167 case AV_PIX_FMT_YUV420P:
168 case AV_PIX_FMT_YUYV422:
169 case AV_PIX_FMT_UYVY422:
170 case AV_PIX_FMT_YUV422P:
171 case AV_PIX_FMT_YUV440P:
172 case AV_PIX_FMT_YUV444P:
173 case AV_PIX_FMT_GBRP:
174 case AV_PIX_FMT_GRAY8:
175 case AV_PIX_FMT_GRAY16BE:
176 case AV_PIX_FMT_GRAY16LE:
177 case AV_PIX_FMT_YUVJ420P:
178 case AV_PIX_FMT_YUVJ422P:
179 case AV_PIX_FMT_YUVJ440P:
180 case AV_PIX_FMT_YUVJ444P:
181 case AV_PIX_FMT_YUVA420P:
182 case AV_PIX_FMT_YUVA422P:
183 case AV_PIX_FMT_YUVA444P:
184 case AV_PIX_FMT_YUV420P9LE:
185 case AV_PIX_FMT_YUV420P9BE:
186 case AV_PIX_FMT_YUV420P10LE:
187 case AV_PIX_FMT_YUV420P10BE:
188 case AV_PIX_FMT_YUV422P9LE:
189 case AV_PIX_FMT_YUV422P9BE:
190 case AV_PIX_FMT_YUV422P10LE:
191 case AV_PIX_FMT_YUV422P10BE:
192 case AV_PIX_FMT_YUV444P9LE:
193 case AV_PIX_FMT_YUV444P9BE:
194 case AV_PIX_FMT_YUV444P10LE:
195 case AV_PIX_FMT_YUV444P10BE:
196 case AV_PIX_FMT_GBRP9LE:
197 case AV_PIX_FMT_GBRP9BE:
198 case AV_PIX_FMT_GBRP10LE:
199 case AV_PIX_FMT_GBRP10BE:
200 w_align = 16; //FIXME assume 16 pixel per macroblock
201 h_align = 16 * 2; // interlaced needs 2 macroblocks height
202 break;
203 case AV_PIX_FMT_YUV411P:
204 case AV_PIX_FMT_UYYVYY411:
205 w_align = 32;
206 h_align = 8;
207 break;
208 case AV_PIX_FMT_YUV410P:
209 if (s->codec_id == AV_CODEC_ID_SVQ1) {
210 w_align = 64;
211 h_align = 64;
212 }
213 case AV_PIX_FMT_RGB555:
214 if (s->codec_id == AV_CODEC_ID_RPZA) {
215 w_align = 4;
216 h_align = 4;
217 }
218 case AV_PIX_FMT_PAL8:
219 case AV_PIX_FMT_BGR8:
220 case AV_PIX_FMT_RGB8:
221 if (s->codec_id == AV_CODEC_ID_SMC) {
222 w_align = 4;
223 h_align = 4;
224 }
225 break;
226 case AV_PIX_FMT_BGR24:
227 if ((s->codec_id == AV_CODEC_ID_MSZH) ||
228 (s->codec_id == AV_CODEC_ID_ZLIB)) {
229 w_align = 4;
230 h_align = 4;
231 }
232 break;
233 default:
234 w_align = 1;
235 h_align = 1;
236 break;
237 }
238
239 *width = FFALIGN(*width, w_align);
240 *height = FFALIGN(*height, h_align);
241 if (s->codec_id == AV_CODEC_ID_H264)
242 // some of the optimized chroma MC reads one line too much
243 *height += 2;
244
245 for (i = 0; i < 4; i++)
246 linesize_align[i] = STRIDE_ALIGN;
247 }
248
249 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height)
250 {
251 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(s->pix_fmt);
252 int chroma_shift = desc->log2_chroma_w;
253 int linesize_align[AV_NUM_DATA_POINTERS];
254 int align;
255
256 avcodec_align_dimensions2(s, width, height, linesize_align);
257 align = FFMAX(linesize_align[0], linesize_align[3]);
258 linesize_align[1] <<= chroma_shift;
259 linesize_align[2] <<= chroma_shift;
260 align = FFMAX3(align, linesize_align[1], linesize_align[2]);
261 *width = FFALIGN(*width, align);
262 }
263
264 int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
265 enum AVSampleFormat sample_fmt, const uint8_t *buf,
266 int buf_size, int align)
267 {
268 int ch, planar, needed_size, ret = 0;
269
270 needed_size = av_samples_get_buffer_size(NULL, nb_channels,
271 frame->nb_samples, sample_fmt,
272 align);
273 if (buf_size < needed_size)
274 return AVERROR(EINVAL);
275
276 planar = av_sample_fmt_is_planar(sample_fmt);
277 if (planar && nb_channels > AV_NUM_DATA_POINTERS) {
278 if (!(frame->extended_data = av_mallocz(nb_channels *
279 sizeof(*frame->extended_data))))
280 return AVERROR(ENOMEM);
281 } else {
282 frame->extended_data = frame->data;
283 }
284
285 if ((ret = av_samples_fill_arrays(frame->extended_data, &frame->linesize[0],
286 buf, nb_channels, frame->nb_samples,
287 sample_fmt, align)) < 0) {
288 if (frame->extended_data != frame->data)
289 av_free(frame->extended_data);
290 return ret;
291 }
292 if (frame->extended_data != frame->data) {
293 for (ch = 0; ch < AV_NUM_DATA_POINTERS; ch++)
294 frame->data[ch] = frame->extended_data[ch];
295 }
296
297 return ret;
298 }
299
300 static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
301 {
302 AVCodecInternal *avci = avctx->internal;
303 InternalBuffer *buf;
304 int buf_size, ret;
305
306 buf_size = av_samples_get_buffer_size(NULL, avctx->channels,
307 frame->nb_samples, avctx->sample_fmt,
308 0);
309 if (buf_size < 0)
310 return AVERROR(EINVAL);
311
312 /* allocate InternalBuffer if needed */
313 if (!avci->buffer) {
314 avci->buffer = av_mallocz(sizeof(InternalBuffer));
315 if (!avci->buffer)
316 return AVERROR(ENOMEM);
317 }
318 buf = avci->buffer;
319
320 /* if there is a previously-used internal buffer, check its size and
321 * channel count to see if we can reuse it */
322 if (buf->extended_data) {
323 /* if current buffer is too small, free it */
324 if (buf->extended_data[0] && buf_size > buf->audio_data_size) {
325 av_free(buf->extended_data[0]);
326 if (buf->extended_data != buf->data)
327 av_free(buf->extended_data);
328 buf->extended_data = NULL;
329 buf->data[0] = NULL;
330 }
331 /* if number of channels has changed, reset and/or free extended data
332 * pointers but leave data buffer in buf->data[0] for reuse */
333 if (buf->nb_channels != avctx->channels) {
334 if (buf->extended_data != buf->data)
335 av_free(buf->extended_data);
336 buf->extended_data = NULL;
337 }
338 }
339
340 /* if there is no previous buffer or the previous buffer cannot be used
341 * as-is, allocate a new buffer and/or rearrange the channel pointers */
342 if (!buf->extended_data) {
343 if (!buf->data[0]) {
344 if (!(buf->data[0] = av_mallocz(buf_size)))
345 return AVERROR(ENOMEM);
346 buf->audio_data_size = buf_size;
347 }
348 if ((ret = avcodec_fill_audio_frame(frame, avctx->channels,
349 avctx->sample_fmt, buf->data[0],
350 buf->audio_data_size, 0)))
351 return ret;
352
353 if (frame->extended_data == frame->data)
354 buf->extended_data = buf->data;
355 else
356 buf->extended_data = frame->extended_data;
357 memcpy(buf->data, frame->data, sizeof(frame->data));
358 buf->linesize[0] = frame->linesize[0];
359 buf->nb_channels = avctx->channels;
360 } else {
361 /* copy InternalBuffer info to the AVFrame */
362 frame->extended_data = buf->extended_data;
363 frame->linesize[0] = buf->linesize[0];
364 memcpy(frame->data, buf->data, sizeof(frame->data));
365 }
366
367 frame->type = FF_BUFFER_TYPE_INTERNAL;
368
369 if (avctx->pkt)
370 frame->pkt_pts = avctx->pkt->pts;
371 else
372 frame->pkt_pts = AV_NOPTS_VALUE;
373 frame->reordered_opaque = avctx->reordered_opaque;
374
375 frame->sample_rate = avctx->sample_rate;
376 frame->format = avctx->sample_fmt;
377 frame->channel_layout = avctx->channel_layout;
378
379 if (avctx->debug & FF_DEBUG_BUFFERS)
380 av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p, "
381 "internal audio buffer used\n", frame);
382
383 return 0;
384 }
385
386 static int video_get_buffer(AVCodecContext *s, AVFrame *pic)
387 {
388 int i;
389 int w = s->width;
390 int h = s->height;
391 InternalBuffer *buf;
392 AVCodecInternal *avci = s->internal;
393
394 if (pic->data[0] != NULL) {
395 av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
396 return -1;
397 }
398 if (avci->buffer_count >= INTERNAL_BUFFER_SIZE) {
399 av_log(s, AV_LOG_ERROR, "buffer_count overflow (missing release_buffer?)\n");
400 return -1;
401 }
402
403 if (av_image_check_size(w, h, 0, s))
404 return -1;
405
406 if (!avci->buffer) {
407 avci->buffer = av_mallocz((INTERNAL_BUFFER_SIZE + 1) *
408 sizeof(InternalBuffer));
409 }
410
411 buf = &avci->buffer[avci->buffer_count];
412
413 if (buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)) {
414 for (i = 0; i < AV_NUM_DATA_POINTERS; i++) {
415 av_freep(&buf->base[i]);
416 buf->data[i] = NULL;
417 }
418 }
419
420 if (!buf->base[0]) {
421 int h_chroma_shift, v_chroma_shift;
422 int size[4] = { 0 };
423 int tmpsize;
424 int unaligned;
425 AVPicture picture;
426 int stride_align[AV_NUM_DATA_POINTERS];
427 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(s->pix_fmt);
428 const int pixel_size = desc->comp[0].step_minus1 + 1;
429
430 av_pix_fmt_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift,
431 &v_chroma_shift);
432
433 avcodec_align_dimensions2(s, &w, &h, stride_align);
434
435 if (!(s->flags & CODEC_FLAG_EMU_EDGE)) {
436 w += EDGE_WIDTH * 2;
437 h += EDGE_WIDTH * 2;
438 }
439
440 do {
441 // NOTE: do not align linesizes individually, this breaks e.g. assumptions
442 // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
443 av_image_fill_linesizes(picture.linesize, s->pix_fmt, w);
444 // increase alignment of w for next try (rhs gives the lowest bit set in w)
445 w += w & ~(w - 1);
446
447 unaligned = 0;
448 for (i = 0; i < 4; i++)
449 unaligned |= picture.linesize[i] % stride_align[i];
450 } while (unaligned);
451
452 tmpsize = av_image_fill_pointers(picture.data, s->pix_fmt, h, NULL, picture.linesize);
453 if (tmpsize < 0)
454 return -1;
455
456 for (i = 0; i < 3 && picture.data[i + 1]; i++)
457 size[i] = picture.data[i + 1] - picture.data[i];
458 size[i] = tmpsize - (picture.data[i] - picture.data[0]);
459
460 memset(buf->base, 0, sizeof(buf->base));
461 memset(buf->data, 0, sizeof(buf->data));
462
463 for (i = 0; i < 4 && size[i]; i++) {
464 const int h_shift = i == 0 ? 0 : h_chroma_shift;
465 const int v_shift = i == 0 ? 0 : v_chroma_shift;
466
467 buf->linesize[i] = picture.linesize[i];
468
469 buf->base[i] = av_malloc(size[i] + 16); //FIXME 16
470 if (buf->base[i] == NULL)
471 return -1;
472 memset(buf->base[i], 128, size[i]);
473
474 // no edge if EDGE EMU or not planar YUV
475 if ((s->flags & CODEC_FLAG_EMU_EDGE) || !size[2])
476 buf->data[i] = buf->base[i];
477 else
478 buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i] * EDGE_WIDTH >> v_shift) + (pixel_size * EDGE_WIDTH >> h_shift), stride_align[i]);
479 }
480 for (; i < AV_NUM_DATA_POINTERS; i++) {
481 buf->base[i] = buf->data[i] = NULL;
482 buf->linesize[i] = 0;
483 }
484 if (size[1] && !size[2])
485 avpriv_set_systematic_pal2((uint32_t *)buf->data[1], s->pix_fmt);
486 buf->width = s->width;
487 buf->height = s->height;
488 buf->pix_fmt = s->pix_fmt;
489 }
490 pic->type = FF_BUFFER_TYPE_INTERNAL;
491
492 for (i = 0; i < AV_NUM_DATA_POINTERS; i++) {
493 pic->base[i] = buf->base[i];
494 pic->data[i] = buf->data[i];
495 pic->linesize[i] = buf->linesize[i];
496 }
497 pic->extended_data = pic->data;
498 avci->buffer_count++;
499 pic->width = buf->width;
500 pic->height = buf->height;
501 pic->format = buf->pix_fmt;
502 pic->sample_aspect_ratio = s->sample_aspect_ratio;
503
504 if (s->pkt)
505 pic->pkt_pts = s->pkt->pts;
506 else
507 pic->pkt_pts = AV_NOPTS_VALUE;
508 pic->reordered_opaque = s->reordered_opaque;
509
510 if (s->debug & FF_DEBUG_BUFFERS)
511 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d "
512 "buffers used\n", pic, avci->buffer_count);
513
514 return 0;
515 }
516
517 int avcodec_default_get_buffer(AVCodecContext *avctx, AVFrame *frame)
518 {
519 switch (avctx->codec_type) {
520 case AVMEDIA_TYPE_VIDEO:
521 return video_get_buffer(avctx, frame);
522 case AVMEDIA_TYPE_AUDIO:
523 return audio_get_buffer(avctx, frame);
524 default:
525 return -1;
526 }
527 }
528
529 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic)
530 {
531 int i;
532 InternalBuffer *buf, *last;
533 AVCodecInternal *avci = s->internal;
534
535 assert(s->codec_type == AVMEDIA_TYPE_VIDEO);
536
537 assert(pic->type == FF_BUFFER_TYPE_INTERNAL);
538 assert(avci->buffer_count);
539
540 if (avci->buffer) {
541 buf = NULL; /* avoids warning */
542 for (i = 0; i < avci->buffer_count; i++) { //just 3-5 checks so is not worth to optimize
543 buf = &avci->buffer[i];
544 if (buf->data[0] == pic->data[0])
545 break;
546 }
547 assert(i < avci->buffer_count);
548 avci->buffer_count--;
549 last = &avci->buffer[avci->buffer_count];
550
551 if (buf != last)
552 FFSWAP(InternalBuffer, *buf, *last);
553 }
554
555 for (i = 0; i < AV_NUM_DATA_POINTERS; i++)
556 pic->data[i] = NULL;
557 // pic->base[i]=NULL;
558
559 if (s->debug & FF_DEBUG_BUFFERS)
560 av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d "
561 "buffers used\n", pic, avci->buffer_count);
562 }
563
564 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic)
565 {
566 AVFrame temp_pic;
567 int i;
568
569 assert(s->codec_type == AVMEDIA_TYPE_VIDEO);
570
571 /* If no picture return a new buffer */
572 if (pic->data[0] == NULL) {
573 /* We will copy from buffer, so must be readable */
574 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
575 return s->get_buffer(s, pic);
576 }
577
578 assert(s->pix_fmt == pic->format);
579
580 /* If internal buffer type return the same buffer */
581 if (pic->type == FF_BUFFER_TYPE_INTERNAL) {
582 if (s->pkt)
583 pic->pkt_pts = s->pkt->pts;
584 else
585 pic->pkt_pts = AV_NOPTS_VALUE;
586 pic->reordered_opaque = s->reordered_opaque;
587 return 0;
588 }
589
590 /*
591 * Not internal type and reget_buffer not overridden, emulate cr buffer
592 */
593 temp_pic = *pic;
594 for (i = 0; i < AV_NUM_DATA_POINTERS; i++)
595 pic->data[i] = pic->base[i] = NULL;
596 pic->opaque = NULL;
597 /* Allocate new frame */
598 if (s->get_buffer(s, pic))
599 return -1;
600 /* Copy image data from old buffer to new buffer */
601 av_picture_copy((AVPicture *)pic, (AVPicture *)&temp_pic, s->pix_fmt, s->width,
602 s->height);
603 s->release_buffer(s, &temp_pic); // Release old frame
604 return 0;
605 }
606
607 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size)
608 {
609 int i;
610
611 for (i = 0; i < count; i++) {
612 int r = func(c, (char *)arg + i * size);
613 if (ret)
614 ret[i] = r;
615 }
616 return 0;
617 }
618
619 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr), void *arg, int *ret, int count)
620 {
621 int i;
622
623 for (i = 0; i < count; i++) {
624 int r = func(c, arg, i, 0);
625 if (ret)
626 ret[i] = r;
627 }
628 return 0;
629 }
630
631 static int is_hwaccel_pix_fmt(enum AVPixelFormat pix_fmt)
632 {
633 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
634 return desc->flags & PIX_FMT_HWACCEL;
635 }
636
637 enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
638 {
639 while (*fmt != AV_PIX_FMT_NONE && is_hwaccel_pix_fmt(*fmt))
640 ++fmt;
641 return fmt[0];
642 }
643
644 void avcodec_get_frame_defaults(AVFrame *frame)
645 {
646 if (frame->extended_data != frame->data)
647 av_freep(&frame->extended_data);
648
649 memset(frame, 0, sizeof(AVFrame));
650
651 frame->pts = AV_NOPTS_VALUE;
652 frame->key_frame = 1;
653 frame->sample_aspect_ratio = (AVRational) {0, 1 };
654 frame->format = -1; /* unknown */
655 frame->extended_data = frame->data;
656 }
657
658 AVFrame *avcodec_alloc_frame(void)
659 {
660 AVFrame *frame = av_mallocz(sizeof(AVFrame));
661
662 if (frame == NULL)
663 return NULL;
664
665 avcodec_get_frame_defaults(frame);
666
667 return frame;
668 }
669
670 void avcodec_free_frame(AVFrame **frame)
671 {
672 AVFrame *f;
673
674 if (!frame || !*frame)
675 return;
676
677 f = *frame;
678
679 if (f->extended_data != f->data)
680 av_freep(&f->extended_data);
681
682 av_freep(frame);
683 }
684
685 int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
686 {
687 int ret = 0;
688 AVDictionary *tmp = NULL;
689
690 if (avcodec_is_open(avctx))
691 return 0;
692
693 if ((!codec && !avctx->codec)) {
694 av_log(avctx, AV_LOG_ERROR, "No codec provided to avcodec_open2().\n");
695 return AVERROR(EINVAL);
696 }
697 if ((codec && avctx->codec && codec != avctx->codec)) {
698 av_log(avctx, AV_LOG_ERROR, "This AVCodecContext was allocated for %s, "
699 "but %s passed to avcodec_open2().\n", avctx->codec->name, codec->name);
700 return AVERROR(EINVAL);
701 }
702 if (!codec)
703 codec = avctx->codec;
704
705 if (avctx->extradata_size < 0 || avctx->extradata_size >= FF_MAX_EXTRADATA_SIZE)
706 return AVERROR(EINVAL);
707
708 if (options)
709 av_dict_copy(&tmp, *options, 0);
710
711 /* If there is a user-supplied mutex locking routine, call it. */
712 if (ff_lockmgr_cb) {
713 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
714 return -1;
715 }
716
717 entangled_thread_counter++;
718 if (entangled_thread_counter != 1) {
719 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
720 ret = -1;
721 goto end;
722 }
723
724 avctx->internal = av_mallocz(sizeof(AVCodecInternal));
725 if (!avctx->internal) {
726 ret = AVERROR(ENOMEM);
727 goto end;
728 }
729
730 if (codec->priv_data_size > 0) {
731 if (!avctx->priv_data) {
732 avctx->priv_data = av_mallocz(codec->priv_data_size);
733 if (!avctx->priv_data) {
734 ret = AVERROR(ENOMEM);
735 goto end;
736 }
737 if (codec->priv_class) {
738 *(const AVClass **)avctx->priv_data = codec->priv_class;
739 av_opt_set_defaults(avctx->priv_data);
740 }
741 }
742 if (codec->priv_class && (ret = av_opt_set_dict(avctx->priv_data, &tmp)) < 0)
743 goto free_and_end;
744 } else {
745 avctx->priv_data = NULL;
746 }
747 if ((ret = av_opt_set_dict(avctx, &tmp)) < 0)
748 goto free_and_end;
749
750 if (avctx->coded_width && avctx->coded_height)
751 avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
752 else if (avctx->width && avctx->height)
753 avcodec_set_dimensions(avctx, avctx->width, avctx->height);
754
755 if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
756 && ( av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0
757 || av_image_check_size(avctx->width, avctx->height, 0, avctx) < 0)) {
758 av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n");
759 avcodec_set_dimensions(avctx, 0, 0);
760 }
761
762 /* if the decoder init function was already called previously,
763 * free the already allocated subtitle_header before overwriting it */
764 if (av_codec_is_decoder(codec))
765 av_freep(&avctx->subtitle_header);
766
767 if (avctx->channels > FF_SANE_NB_CHANNELS) {
768 ret = AVERROR(EINVAL);
769 goto free_and_end;
770 }
771
772 avctx->codec = codec;
773 if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
774 avctx->codec_id == AV_CODEC_ID_NONE) {
775 avctx->codec_type = codec->type;
776 avctx->codec_id = codec->id;
777 }
778 if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type
779 && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
780 av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
781 ret = AVERROR(EINVAL);
782 goto free_and_end;
783 }
784 avctx->frame_number = 0;
785
786 if (avctx->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
787 avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
788 ret = AVERROR_EXPERIMENTAL;
789 goto free_and_end;
790 }
791
792 if (avctx->codec_type == AVMEDIA_TYPE_AUDIO &&
793 (!avctx->time_base.num || !avctx->time_base.den)) {
794 avctx->time_base.num = 1;
795 avctx->time_base.den = avctx->sample_rate;
796 }
797
798 if (HAVE_THREADS && !avctx->thread_opaque) {
799 ret = ff_thread_init(avctx);
800 if (ret < 0) {
801 goto free_and_end;
802 }
803 }
804 if (!HAVE_THREADS && !(codec->capabilities & CODEC_CAP_AUTO_THREADS))
805 avctx->thread_count = 1;
806
807 if (av_codec_is_encoder(avctx->codec)) {
808 int i;
809 if (avctx->codec->sample_fmts) {
810 for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++) {
811 if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
812 break;
813 if (avctx->channels == 1 &&
814 av_get_planar_sample_fmt(avctx->sample_fmt) ==
815 av_get_planar_sample_fmt(avctx->codec->sample_fmts[i])) {
816 avctx->sample_fmt = avctx->codec->sample_fmts[i];
817 break;
818 }
819 }
820 if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
821 av_log(avctx, AV_LOG_ERROR, "Specified sample_fmt is not supported.\n");
822 ret = AVERROR(EINVAL);
823 goto free_and_end;
824 }
825 }
826 if (avctx->codec->pix_fmts) {
827 for (i = 0; avctx->codec->pix_fmts[i] != AV_PIX_FMT_NONE; i++)
828 if (avctx->pix_fmt == avctx->codec->pix_fmts[i])
829 break;
830 if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_NONE) {
831 av_log(avctx, AV_LOG_ERROR, "Specified pix_fmt is not supported\n");
832 ret = AVERROR(EINVAL);
833 goto free_and_end;
834 }
835 }
836 if (avctx->codec->supported_samplerates) {
837 for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)
838 if (avctx->sample_rate == avctx->codec->supported_samplerates[i])
839 break;
840 if (avctx->codec->supported_samplerates[i] == 0) {
841 av_log(avctx, AV_LOG_ERROR, "Specified sample_rate is not supported\n");
842 ret = AVERROR(EINVAL);
843 goto free_and_end;
844 }
845 }
846 if (avctx->codec->channel_layouts) {
847 if (!avctx->channel_layout) {
848 av_log(avctx, AV_LOG_WARNING, "channel_layout not specified\n");
849 } else {
850 for (i = 0; avctx->codec->channel_layouts[i] != 0; i++)
851 if (avctx->channel_layout == avctx->codec->channel_layouts[i])
852 break;
853 if (avctx->codec->channel_layouts[i] == 0) {
854 av_log(avctx, AV_LOG_ERROR, "Specified channel_layout is not supported\n");
855 ret = AVERROR(EINVAL);
856 goto free_and_end;
857 }
858 }
859 }
860 if (avctx->channel_layout && avctx->channels) {
861 if (av_get_channel_layout_nb_channels(avctx->channel_layout) != avctx->channels) {
862 av_log(avctx, AV_LOG_ERROR, "channel layout does not match number of channels\n");
863 ret = AVERROR(EINVAL);
864 goto free_and_end;
865 }
866 } else if (avctx->channel_layout) {
867 avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
868 }
869 }
870
871 if (avctx->codec->init && !(avctx->active_thread_type & FF_THREAD_FRAME)) {
872 ret = avctx->codec->init(avctx);
873 if (ret < 0) {
874 goto free_and_end;
875 }
876 }
877
878 if (av_codec_is_decoder(avctx->codec)) {
879 /* validate channel layout from the decoder */
880 if (avctx->channel_layout) {
881 int channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
882 if (!avctx->channels)
883 avctx->channels = channels;
884 else if (channels != avctx->channels) {
885 av_log(avctx, AV_LOG_WARNING,
886 "channel layout does not match number of channels\n");
887 avctx->channel_layout = 0;
888 }
889 }
890 if (avctx->channels && avctx->channels < 0 ||
891 avctx->channels > FF_SANE_NB_CHANNELS) {
892 ret = AVERROR(EINVAL);
893 goto free_and_end;
894 }
895 }
896 end:
897 entangled_thread_counter--;
898
899 /* Release any user-supplied mutex. */
900 if (ff_lockmgr_cb) {
901 (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
902 }
903 if (options) {
904 av_dict_free(options);
905 *options = tmp;
906 }
907
908 return ret;
909 free_and_end:
910 av_dict_free(&tmp);
911 av_freep(&avctx->priv_data);
912 av_freep(&avctx->internal);
913 avctx->codec = NULL;
914 goto end;
915 }
916
917 int ff_alloc_packet(AVPacket *avpkt, int size)
918 {
919 if (size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE)
920 return AVERROR(EINVAL);
921
922 if (avpkt->data) {
923 void *destruct = avpkt->destruct;
924
925 if (avpkt->size < size)
926 return AVERROR(EINVAL);
927
928 av_init_packet(avpkt);
929 avpkt->destruct = destruct;
930 avpkt->size = size;
931 return 0;
932 } else {
933 return av_new_packet(avpkt, size);
934 }
935 }
936
937 /**
938 * Pad last frame with silence.
939 */
940 static int pad_last_frame(AVCodecContext *s, AVFrame **dst, const AVFrame *src)
941 {
942 AVFrame *frame = NULL;
943 uint8_t *buf = NULL;
944 int ret;
945
946 if (!(frame = avcodec_alloc_frame()))
947 return AVERROR(ENOMEM);
948 *frame = *src;
949
950 if ((ret = av_samples_get_buffer_size(&frame->linesize[0], s->channels,
951 s->frame_size, s->sample_fmt, 0)) < 0)
952 goto fail;
953
954 if (!(buf = av_malloc(ret))) {
955 ret = AVERROR(ENOMEM);
956 goto fail;
957 }
958
959 frame->nb_samples = s->frame_size;
960 if ((ret = avcodec_fill_audio_frame(frame, s->channels, s->sample_fmt,
961 buf, ret, 0)) < 0)
962 goto fail;
963 if ((ret = av_samples_copy(frame->extended_data, src->extended_data, 0, 0,
964 src->nb_samples, s->channels, s->sample_fmt)) < 0)
965 goto fail;
966 if ((ret = av_samples_set_silence(frame->extended_data, src->nb_samples,
967 frame->nb_samples - src->nb_samples,
968 s->channels, s->sample_fmt)) < 0)
969 goto fail;
970
971 *dst = frame;
972
973 return 0;
974
975 fail:
976 if (frame->extended_data != frame->data)
977 av_freep(&frame->extended_data);
978 av_freep(&buf);
979 av_freep(&frame);
980 return ret;
981 }
982
983 int attribute_align_arg avcodec_encode_audio2(AVCodecContext *avctx,
984 AVPacket *avpkt,
985 const AVFrame *frame,
986 int *got_packet_ptr)
987 {
988 AVFrame tmp;
989 AVFrame *padded_frame = NULL;
990 int ret;
991 int user_packet = !!avpkt->data;
992
993 *got_packet_ptr = 0;
994
995 if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) {
996 av_free_packet(avpkt);
997 av_init_packet(avpkt);
998 return 0;
999 }
1000
1001 /* ensure that extended_data is properly set */
1002 if (frame && !frame->extended_data) {
1003 if (av_sample_fmt_is_planar(avctx->sample_fmt) &&
1004 avctx->channels > AV_NUM_DATA_POINTERS) {
1005 av_log(avctx, AV_LOG_ERROR, "Encoding to a planar sample format, "
1006 "with more than %d channels, but extended_data is not set.\n",
1007 AV_NUM_DATA_POINTERS);
1008 return AVERROR(EINVAL);
1009 }
1010 av_log(avctx, AV_LOG_WARNING, "extended_data is not set.\n");
1011
1012 tmp = *frame;
1013 tmp.extended_data = tmp.data;
1014 frame = &tmp;
1015 }
1016
1017 /* check for valid frame size */
1018 if (frame) {
1019 if (avctx->codec->capabilities & CODEC_CAP_SMALL_LAST_FRAME) {
1020 if (frame->nb_samples > avctx->frame_size)
1021 return AVERROR(EINVAL);
1022 } else if (!(avctx->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)) {
1023 if (frame->nb_samples < avctx->frame_size &&
1024 !avctx->internal->last_audio_frame) {
1025 ret = pad_last_frame(avctx, &padded_frame, frame);
1026 if (ret < 0)
1027 return ret;
1028
1029 frame = padded_frame;
1030 avctx->internal->last_audio_frame = 1;
1031 }
1032
1033 if (frame->nb_samples != avctx->frame_size) {
1034 ret = AVERROR(EINVAL);
1035 goto end;
1036 }
1037 }
1038 }
1039
1040 ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
1041 if (!ret) {
1042 if (*got_packet_ptr) {
1043 if (!(avctx->codec->capabilities & CODEC_CAP_DELAY)) {
1044 if (avpkt->pts == AV_NOPTS_VALUE)
1045 avpkt->pts = frame->pts;
1046 if (!avpkt->duration)
1047 avpkt->duration = ff_samples_to_time_base(avctx,
1048 frame->nb_samples);
1049 }
1050 avpkt->dts = avpkt->pts;
1051 } else {
1052 avpkt->size = 0;
1053 }
1054
1055 if (!user_packet && avpkt->size) {
1056 uint8_t *new_data = av_realloc(avpkt->data, avpkt->size);
1057 if (new_data)
1058 avpkt->data = new_data;
1059 }
1060
1061 avctx->frame_number++;
1062 }
1063
1064 if (ret < 0 || !*got_packet_ptr) {
1065 av_free_packet(avpkt);
1066 av_init_packet(avpkt);
1067 goto end;
1068 }
1069
1070 /* NOTE: if we add any audio encoders which output non-keyframe packets,
1071 * this needs to be moved to the encoders, but for now we can do it
1072 * here to simplify things */
1073 avpkt->flags |= AV_PKT_FLAG_KEY;
1074
1075 end:
1076 if (padded_frame) {
1077 av_freep(&padded_frame->data[0]);
1078 if (padded_frame->extended_data != padded_frame->data)
1079 av_freep(&padded_frame->extended_data);
1080 av_freep(&padded_frame);
1081 }
1082
1083 return ret;
1084 }
1085
1086 #if FF_API_OLD_ENCODE_AUDIO
1087 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx,
1088 uint8_t *buf, int buf_size,
1089 const short *samples)
1090 {
1091 AVPacket pkt;
1092 AVFrame frame0 = { 0 };
1093 AVFrame *frame;
1094 int ret, samples_size, got_packet;
1095
1096 av_init_packet(&pkt);
1097 pkt.data = buf;
1098 pkt.size = buf_size;
1099
1100 if (samples) {
1101 frame = &frame0;
1102 avcodec_get_frame_defaults(frame);
1103
1104 if (avctx->frame_size) {
1105 frame->nb_samples = avctx->frame_size;
1106 } else {
1107 /* if frame_size is not set, the number of samples must be
1108 * calculated from the buffer size */
1109 int64_t nb_samples;
1110 if (!av_get_bits_per_sample(avctx->codec_id)) {
1111 av_log(avctx, AV_LOG_ERROR, "avcodec_encode_audio() does not "
1112 "support this codec\n");
1113 return AVERROR(EINVAL);
1114 }
1115 nb_samples = (int64_t)buf_size * 8 /
1116 (av_get_bits_per_sample(avctx->codec_id) *
1117 avctx->channels);
1118 if (nb_samples >= INT_MAX)
1119 return AVERROR(EINVAL);
1120 frame->nb_samples = nb_samples;
1121 }
1122
1123 /* it is assumed that the samples buffer is large enough based on the
1124 * relevant parameters */
1125 samples_size = av_samples_get_buffer_size(NULL, avctx->channels,
1126 frame->nb_samples,
1127 avctx->sample_fmt, 1);
1128 if ((ret = avcodec_fill_audio_frame(frame, avctx->channels,
1129 avctx->sample_fmt,
1130 (const uint8_t *)samples,
1131 samples_size, 1)))
1132 return ret;
1133
1134 /* fabricate frame pts from sample count.
1135 * this is needed because the avcodec_encode_audio() API does not have
1136 * a way for the user to provide pts */
1137 frame->pts = ff_samples_to_time_base(avctx,
1138 avctx->internal->sample_count);
1139 avctx->internal->sample_count += frame->nb_samples;
1140 } else {
1141 frame = NULL;
1142 }
1143
1144 got_packet = 0;
1145 ret = avcodec_encode_audio2(avctx, &pkt, frame, &got_packet);
1146 if (!ret && got_packet && avctx->coded_frame) {
1147 avctx->coded_frame->pts = pkt.pts;
1148 avctx->coded_frame->key_frame = !!(pkt.flags & AV_PKT_FLAG_KEY);
1149 }
1150 /* free any side data since we cannot return it */
1151 if (pkt.side_data_elems > 0) {
1152 int i;
1153 for (i = 0; i < pkt.side_data_elems; i++)
1154 av_free(pkt.side_data[i].data);
1155 av_freep(&pkt.side_data);
1156 pkt.side_data_elems = 0;
1157 }
1158
1159 if (frame && frame->extended_data != frame->data)
1160 av_free(frame->extended_data);
1161
1162 return ret ? ret : pkt.size;
1163 }
1164
1165 #endif
1166
1167 #if FF_API_OLD_ENCODE_VIDEO
1168 int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1169 const AVFrame *pict)
1170 {
1171 AVPacket pkt;
1172 int ret, got_packet = 0;
1173
1174 if (buf_size < FF_MIN_BUFFER_SIZE) {
1175 av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
1176 return -1;
1177 }
1178
1179 av_init_packet(&pkt);
1180 pkt.data = buf;
1181 pkt.size = buf_size;
1182
1183 ret = avcodec_encode_video2(avctx, &pkt, pict, &got_packet);
1184 if (!ret && got_packet && avctx->coded_frame) {
1185 avctx->coded_frame->pts = pkt.pts;
1186 avctx->coded_frame->key_frame = !!(pkt.flags & AV_PKT_FLAG_KEY);
1187 }
1188
1189 /* free any side data since we cannot return it */
1190 if (pkt.side_data_elems > 0) {
1191 int i;
1192 for (i = 0; i < pkt.side_data_elems; i++)
1193 av_free(pkt.side_data[i].data);
1194 av_freep(&pkt.side_data);
1195 pkt.side_data_elems = 0;
1196 }
1197
1198 return ret ? ret : pkt.size;
1199 }
1200
1201 #endif
1202
1203 int attribute_align_arg avcodec_encode_video2(AVCodecContext *avctx,
1204 AVPacket *avpkt,
1205 const AVFrame *frame,
1206 int *got_packet_ptr)
1207 {
1208 int ret;
1209 int user_packet = !!avpkt->data;
1210
1211 *got_packet_ptr = 0;
1212
1213 if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) {
1214 av_free_packet(avpkt);
1215 av_init_packet(avpkt);
1216 avpkt->size = 0;
1217 return 0;
1218 }
1219
1220 if (av_image_check_size(avctx->width, avctx->height, 0, avctx))
1221 return AVERROR(EINVAL);
1222
1223 av_assert0(avctx->codec->encode2);
1224
1225 ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
1226 if (!ret) {
1227 if (!*got_packet_ptr)
1228 avpkt->size = 0;
1229 else if (!(avctx->codec->capabilities & CODEC_CAP_DELAY))
1230 avpkt->pts = avpkt->dts = frame->pts;
1231
1232 if (!user_packet && avpkt->size) {
1233 uint8_t *new_data = av_realloc(avpkt->data, avpkt->size);
1234 if (new_data)
1235 avpkt->data = new_data;
1236 }
1237
1238 avctx->frame_number++;
1239 }
1240
1241 if (ret < 0 || !*got_packet_ptr)
1242 av_free_packet(avpkt);
1243
1244 emms_c();
1245 return ret;
1246 }
1247
1248 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1249 const AVSubtitle *sub)
1250 {
1251 int ret;
1252 if (sub->start_display_time) {
1253 av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
1254 return -1;
1255 }
1256 if (sub->num_rects == 0 || !sub->rects)
1257 return -1;
1258 ret = avctx->codec->encode_sub(avctx, buf, buf_size, sub);
1259 avctx->frame_number++;
1260 return ret;
1261 }
1262
1263 static void apply_param_change(AVCodecContext *avctx, AVPacket *avpkt)
1264 {
1265 int size = 0;
1266 const uint8_t *data;
1267 uint32_t flags;
1268
1269 if (!(avctx->codec->capabilities & CODEC_CAP_PARAM_CHANGE))
1270 return;
1271
1272 data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size);
1273 if (!data || size < 4)
1274 return;
1275 flags = bytestream_get_le32(&data);
1276 size -= 4;
1277 if (size < 4) /* Required for any of the changes */
1278 return;
1279 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) {
1280 avctx->channels = bytestream_get_le32(&data);
1281 size -= 4;
1282 }
1283 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) {
1284 if (size < 8)
1285 return;
1286 avctx->channel_layout = bytestream_get_le64(&data);
1287 size -= 8;
1288 }
1289 if (size < 4)
1290 return;
1291 if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) {
1292 avctx->sample_rate = bytestream_get_le32(&data);
1293 size -= 4;
1294 }
1295 if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) {
1296 if (size < 8)
1297 return;
1298 avctx->width = bytestream_get_le32(&data);
1299 avctx->height = bytestream_get_le32(&data);
1300 avcodec_set_dimensions(avctx, avctx->width, avctx->height);
1301 size -= 8;
1302 }
1303 }
1304
1305 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
1306 int *got_picture_ptr,
1307 AVPacket *avpkt)
1308 {
1309 int ret;
1310
1311 *got_picture_ptr = 0;
1312 if ((avctx->coded_width || avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
1313 return -1;
1314
1315 avctx->pkt = avpkt;
1316 apply_param_change(avctx, avpkt);
1317
1318 avcodec_get_frame_defaults(picture);
1319
1320 if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type & FF_THREAD_FRAME)) {
1321 if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
1322 ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr,
1323 avpkt);
1324 else {
1325 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
1326 avpkt);
1327 picture->pkt_dts = avpkt->dts;
1328 picture->sample_aspect_ratio = avctx->sample_aspect_ratio;
1329 picture->width = avctx->width;
1330 picture->height = avctx->height;
1331 picture->format = avctx->pix_fmt;
1332 }
1333
1334 emms_c(); //needed to avoid an emms_c() call before every return;
1335
1336 if (*got_picture_ptr)
1337 avctx->frame_number++;
1338 } else
1339 ret = 0;
1340
1341 /* many decoders assign whole AVFrames, thus overwriting extended_data;
1342 * make sure it's set correctly */
1343 picture->extended_data = picture->data;
1344
1345 return ret;
1346 }
1347
1348 #if FF_API_OLD_DECODE_AUDIO
1349 int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
1350 int *frame_size_ptr,
1351 AVPacket *avpkt)
1352 {
1353 AVFrame frame = {0};
1354 int ret, got_frame = 0;
1355
1356 if (avctx->get_buffer != avcodec_default_get_buffer) {
1357 av_log(avctx, AV_LOG_ERROR, "Custom get_buffer() for use with"
1358 "avcodec_decode_audio3() detected. Overriding with avcodec_default_get_buffer\n");
1359 av_log(avctx, AV_LOG_ERROR, "Please port your application to "
1360 "avcodec_decode_audio4()\n");
1361 avctx->get_buffer = avcodec_default_get_buffer;
1362 }
1363
1364 ret = avcodec_decode_audio4(avctx, &frame, &got_frame, avpkt);
1365
1366 if (ret >= 0 && got_frame) {
1367 int ch, plane_size;
1368 int planar = av_sample_fmt_is_planar(avctx->sample_fmt);
1369 int data_size = av_samples_get_buffer_size(&plane_size, avctx->channels,
1370 frame.nb_samples,
1371 avctx->sample_fmt, 1);
1372 if (*frame_size_ptr < data_size) {
1373 av_log(avctx, AV_LOG_ERROR, "output buffer size is too small for "
1374 "the current frame (%d < %d)\n", *frame_size_ptr, data_size);
1375 return AVERROR(EINVAL);
1376 }
1377
1378 memcpy(samples, frame.extended_data[0], plane_size);
1379
1380 if (planar && avctx->channels > 1) {
1381 uint8_t *out = ((uint8_t *)samples) + plane_size;
1382 for (ch = 1; ch < avctx->channels; ch++) {
1383 memcpy(out, frame.extended_data[ch], plane_size);
1384 out += plane_size;
1385 }
1386 }
1387 *frame_size_ptr = data_size;
1388 } else {
1389 *frame_size_ptr = 0;
1390 }
1391 return ret;
1392 }
1393
1394 #endif
1395
1396 int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
1397 AVFrame *frame,
1398 int *got_frame_ptr,
1399 AVPacket *avpkt)
1400 {
1401 int planar, channels;
1402 int ret = 0;
1403
1404 *got_frame_ptr = 0;
1405
1406 avctx->pkt = avpkt;
1407
1408 if (!avpkt->data && avpkt->size) {
1409 av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n");
1410 return AVERROR(EINVAL);
1411 }
1412
1413 apply_param_change(avctx, avpkt);
1414
1415 avcodec_get_frame_defaults(frame);
1416
1417 if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size) {
1418 ret = avctx->codec->decode(avctx, frame, got_frame_ptr, avpkt);
1419 if (ret >= 0 && *got_frame_ptr) {
1420 avctx->frame_number++;
1421 frame->pkt_dts = avpkt->dts;
1422 if (frame->format == AV_SAMPLE_FMT_NONE)
1423 frame->format = avctx->sample_fmt;
1424 }
1425 }
1426
1427 /* many decoders assign whole AVFrames, thus overwriting extended_data;
1428 * make sure it's set correctly; assume decoders that actually use
1429 * extended_data are doing it correctly */
1430 planar = av_sample_fmt_is_planar(frame->format);
1431 channels = av_get_channel_layout_nb_channels(frame->channel_layout);
1432 if (!(planar && channels > AV_NUM_DATA_POINTERS))
1433 frame->extended_data = frame->data;
1434
1435 return ret;
1436 }
1437
1438 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
1439 int *got_sub_ptr,
1440 AVPacket *avpkt)
1441 {
1442 int ret;
1443
1444 avctx->pkt = avpkt;
1445 *got_sub_ptr = 0;
1446 ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
1447 if (*got_sub_ptr)
1448 avctx->frame_number++;
1449 return ret;
1450 }
1451
1452 void avsubtitle_free(AVSubtitle *sub)
1453 {
1454 int i;
1455
1456 for (i = 0; i < sub->num_rects; i++) {
1457 av_freep(&sub->rects[i]->pict.data[0]);
1458 av_freep(&sub->rects[i]->pict.data[1]);
1459 av_freep(&sub->rects[i]->pict.data[2]);
1460 av_freep(&sub->rects[i]->pict.data[3]);
1461 av_freep(&sub->rects[i]->text);
1462 av_freep(&sub->rects[i]->ass);
1463 av_freep(&sub->rects[i]);
1464 }
1465
1466 av_freep(&sub->rects);
1467
1468 memset(sub, 0, sizeof(AVSubtitle));
1469 }
1470
1471 av_cold int avcodec_close(AVCodecContext *avctx)
1472 {
1473 /* If there is a user-supplied mutex locking routine, call it. */
1474 if (ff_lockmgr_cb) {
1475 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
1476 return -1;
1477 }
1478
1479 entangled_thread_counter++;
1480 if (entangled_thread_counter != 1) {
1481 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
1482 entangled_thread_counter--;
1483 return -1;
1484 }
1485
1486 if (avcodec_is_open(avctx)) {
1487 if (HAVE_THREADS && avctx->thread_opaque)
1488 ff_thread_free(avctx);
1489 if (avctx->codec && avctx->codec->close)
1490 avctx->codec->close(avctx);
1491 avcodec_default_free_buffers(avctx);
1492 avctx->coded_frame = NULL;
1493 av_freep(&avctx->internal);
1494 }
1495
1496 if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)
1497 av_opt_free(avctx->priv_data);
1498 av_opt_free(avctx);
1499 av_freep(&avctx->priv_data);
1500 if (av_codec_is_encoder(avctx->codec))
1501 av_freep(&avctx->extradata);
1502 avctx->codec = NULL;
1503 avctx->active_thread_type = 0;
1504 entangled_thread_counter--;
1505
1506 /* Release any user-supplied mutex. */
1507 if (ff_lockmgr_cb) {
1508 (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
1509 }
1510 return 0;
1511 }
1512
1513 static AVCodec *find_encdec(enum AVCodecID id, int encoder)
1514 {
1515 AVCodec *p, *experimental = NULL;
1516 p = first_avcodec;
1517 while (p) {
1518 if ((encoder ? av_codec_is_encoder(p) : av_codec_is_decoder(p)) &&
1519 p->id == id) {
1520 if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
1521 experimental = p;
1522 } else
1523 return p;
1524 }
1525 p = p->next;
1526 }
1527 return experimental;
1528 }
1529
1530 AVCodec *avcodec_find_encoder(enum AVCodecID id)
1531 {
1532 return find_encdec(id, 1);
1533 }
1534
1535 AVCodec *avcodec_find_encoder_by_name(const char *name)
1536 {
1537 AVCodec *p;
1538 if (!name)
1539 return NULL;
1540 p = first_avcodec;
1541 while (p) {
1542 if (av_codec_is_encoder(p) && strcmp(name, p->name) == 0)
1543 return p;
1544 p = p->next;
1545 }
1546 return NULL;
1547 }
1548
1549 AVCodec *avcodec_find_decoder(enum AVCodecID id)
1550 {
1551 return find_encdec(id, 0);
1552 }
1553
1554 AVCodec *avcodec_find_decoder_by_name(const char *name)
1555 {
1556 AVCodec *p;
1557 if (!name)
1558 return NULL;
1559 p = first_avcodec;
1560 while (p) {
1561 if (av_codec_is_decoder(p) && strcmp(name, p->name) == 0)
1562 return p;
1563 p = p->next;
1564 }
1565 return NULL;
1566 }
1567
1568 static int get_bit_rate(AVCodecContext *ctx)
1569 {
1570 int bit_rate;
1571 int bits_per_sample;
1572
1573 switch (ctx->codec_type) {
1574 case AVMEDIA_TYPE_VIDEO:
1575 case AVMEDIA_TYPE_DATA:
1576 case AVMEDIA_TYPE_SUBTITLE:
1577 case AVMEDIA_TYPE_ATTACHMENT:
1578 bit_rate = ctx->bit_rate;
1579 break;
1580 case AVMEDIA_TYPE_AUDIO:
1581 bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
1582 bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
1583 break;
1584 default:
1585 bit_rate = 0;
1586 break;
1587 }
1588 return bit_rate;
1589 }
1590
1591 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
1592 {
1593 int i, len, ret = 0;
1594
1595 for (i = 0; i < 4; i++) {
1596 len = snprintf(buf, buf_size,
1597 isprint(codec_tag & 0xFF) ? "%c" : "[%d]", codec_tag & 0xFF);
1598 buf += len;
1599 buf_size = buf_size > len ? buf_size - len : 0;
1600 ret += len;
1601 codec_tag >>= 8;
1602 }
1603 return ret;
1604 }
1605
1606 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
1607 {
1608 const char *codec_name;
1609 const char *profile = NULL;
1610 const AVCodec *p;
1611 char buf1[32];
1612 int bitrate;
1613 AVRational display_aspect_ratio;
1614
1615 if (enc->codec)
1616 p = enc->codec;
1617 else if (encode)
1618 p = avcodec_find_encoder(enc->codec_id);
1619 else
1620 p = avcodec_find_decoder(enc->codec_id);
1621
1622 if (p) {
1623 codec_name = p->name;
1624 profile = av_get_profile_name(p, enc->profile);
1625 } else if (enc->codec_id == AV_CODEC_ID_MPEG2TS) {
1626 /* fake mpeg2 transport stream codec (currently not
1627 * registered) */
1628 codec_name = "mpeg2ts";
1629 } else if (enc->codec_name[0] != '\0') {
1630 codec_name = enc->codec_name;
1631 } else {
1632 /* output avi tags */
1633 char tag_buf[32];
1634 av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
1635 snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
1636 codec_name = buf1;
1637 }
1638
1639 switch (enc->codec_type) {
1640 case AVMEDIA_TYPE_VIDEO:
1641 snprintf(buf, buf_size,
1642 "Video: %s%s",
1643 codec_name, enc->mb_decision ? " (hq)" : "");
1644 if (profile)
1645 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1646 " (%s)", profile);
1647 if (enc->pix_fmt != AV_PIX_FMT_NONE) {
1648 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1649 ", %s",
1650 av_get_pix_fmt_name(enc->pix_fmt));
1651 }
1652 if (enc->width) {
1653 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1654 ", %dx%d",
1655 enc->width, enc->height);
1656 if (enc->sample_aspect_ratio.num) {
1657 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1658 enc->width * enc->sample_aspect_ratio.num,
1659 enc->height * enc->sample_aspect_ratio.den,
1660 1024 * 1024);
1661 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1662 " [PAR %d:%d DAR %d:%d]",
1663 enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
1664 display_aspect_ratio.num, display_aspect_ratio.den);
1665 }
1666 if (av_log_get_level() >= AV_LOG_DEBUG) {
1667 int g = av_gcd(enc->time_base.num, enc->time_base.den);
1668 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1669 ", %d/%d",
1670 enc->time_base.num / g, enc->time_base.den / g);
1671 }
1672 }
1673 if (encode) {
1674 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1675 ", q=%d-%d", enc->qmin, enc->qmax);
1676 }
1677 break;
1678 case AVMEDIA_TYPE_AUDIO:
1679 snprintf(buf, buf_size,
1680 "Audio: %s",
1681 codec_name);
1682 if (profile)
1683 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1684 " (%s)", profile);
1685 if (enc->sample_rate) {
1686 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1687 ", %d Hz", enc->sample_rate);
1688 }
1689 av_strlcat(buf, ", ", buf_size);
1690 av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
1691 if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {
1692 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1693 ", %s", av_get_sample_fmt_name(enc->sample_fmt));
1694 }
1695 break;
1696 case AVMEDIA_TYPE_DATA:
1697 snprintf(buf, buf_size, "Data: %s", codec_name);
1698 break;
1699 case AVMEDIA_TYPE_SUBTITLE:
1700 snprintf(buf, buf_size, "Subtitle: %s", codec_name);
1701 break;
1702 case AVMEDIA_TYPE_ATTACHMENT:
1703 snprintf(buf, buf_size, "Attachment: %s", codec_name);
1704 break;
1705 default:
1706 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
1707 return;
1708 }
1709 if (encode) {
1710 if (enc->flags & CODEC_FLAG_PASS1)
1711 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1712 ", pass 1");
1713 if (enc->flags & CODEC_FLAG_PASS2)
1714 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1715 ", pass 2");
1716 }
1717 bitrate = get_bit_rate(enc);
1718 if (bitrate != 0) {
1719 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1720 ", %d kb/s", bitrate / 1000);
1721 }
1722 }
1723
1724 const char *av_get_profile_name(const AVCodec *codec, int profile)
1725 {
1726 const AVProfile *p;
1727 if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)
1728 return NULL;
1729
1730 for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
1731 if (p->profile == profile)
1732 return p->name;
1733
1734 return NULL;
1735 }
1736
1737 unsigned avcodec_version(void)
1738 {
1739 return LIBAVCODEC_VERSION_INT;
1740 }
1741
1742 const char *avcodec_configuration(void)
1743 {
1744 return LIBAV_CONFIGURATION;
1745 }
1746
1747 const char *avcodec_license(void)
1748 {
1749 #define LICENSE_PREFIX "libavcodec license: "
1750 return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
1751 }
1752
1753 void avcodec_flush_buffers(AVCodecContext *avctx)
1754 {
1755 if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
1756 ff_thread_flush(avctx);
1757 else if (avctx->codec->flush)
1758 avctx->codec->flush(avctx);
1759 }
1760
1761 static void video_free_buffers(AVCodecContext *s)
1762 {
1763 AVCodecInternal *avci = s->internal;
1764 int i, j;
1765
1766 if (!avci->buffer)
1767 return;
1768
1769 if (avci->buffer_count)
1770 av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n",
1771 avci->buffer_count);
1772 for (i = 0; i < INTERNAL_BUFFER_SIZE; i++) {
1773 InternalBuffer *buf = &avci->buffer[i];
1774 for (j = 0; j < 4; j++) {
1775 av_freep(&buf->base[j]);
1776 buf->data[j] = NULL;
1777 }
1778 }
1779 av_freep(&avci->buffer);
1780
1781 avci->buffer_count = 0;
1782 }
1783
1784 static void audio_free_buffers(AVCodecContext *avctx)
1785 {
1786 AVCodecInternal *avci = avctx->internal;
1787 InternalBuffer *buf;
1788
1789 if (!avci->buffer)
1790 return;
1791 buf = avci->buffer;
1792
1793 if (buf->extended_data) {
1794 av_free(buf->extended_data[0]);
1795 if (buf->extended_data != buf->data)
1796 av_free(buf->extended_data);
1797 }
1798 av_freep(&avci->buffer);
1799 }
1800
1801 void avcodec_default_free_buffers(AVCodecContext *avctx)
1802 {
1803 switch (avctx->codec_type) {
1804 case AVMEDIA_TYPE_VIDEO:
1805 video_free_buffers(avctx);
1806 break;
1807 case AVMEDIA_TYPE_AUDIO:
1808 audio_free_buffers(avctx);
1809 break;
1810 default:
1811 break;
1812 }
1813 }
1814
1815 int av_get_exact_bits_per_sample(enum AVCodecID codec_id)
1816 {
1817 switch (codec_id) {
1818 case AV_CODEC_ID_ADPCM_CT:
1819 case AV_CODEC_ID_ADPCM_IMA_APC:
1820 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
1821 case AV_CODEC_ID_ADPCM_IMA_WS:
1822 case AV_CODEC_ID_ADPCM_G722:
1823 case AV_CODEC_ID_ADPCM_YAMAHA:
1824 return 4;
1825 case AV_CODEC_ID_PCM_ALAW:
1826 case AV_CODEC_ID_PCM_MULAW:
1827 case AV_CODEC_ID_PCM_S8:
1828 case AV_CODEC_ID_PCM_U8:
1829 case AV_CODEC_ID_PCM_ZORK:
1830 return 8;
1831 case AV_CODEC_ID_PCM_S16BE:
1832 case AV_CODEC_ID_PCM_S16LE:
1833 case AV_CODEC_ID_PCM_S16LE_PLANAR:
1834 case AV_CODEC_ID_PCM_U16BE:
1835 case AV_CODEC_ID_PCM_U16LE:
1836 return 16;
1837 case AV_CODEC_ID_PCM_S24DAUD:
1838 case AV_CODEC_ID_PCM_S24BE:
1839 case AV_CODEC_ID_PCM_S24LE:
1840 case AV_CODEC_ID_PCM_U24BE:
1841 case AV_CODEC_ID_PCM_U24LE:
1842 return 24;
1843 case AV_CODEC_ID_PCM_S32BE:
1844 case AV_CODEC_ID_PCM_S32LE:
1845 case AV_CODEC_ID_PCM_U32BE:
1846 case AV_CODEC_ID_PCM_U32LE:
1847 case AV_CODEC_ID_PCM_F32BE:
1848 case AV_CODEC_ID_PCM_F32LE:
1849 return 32;
1850 case AV_CODEC_ID_PCM_F64BE:
1851 case AV_CODEC_ID_PCM_F64LE:
1852 return 64;
1853 default:
1854 return 0;
1855 }
1856 }
1857
1858 int av_get_bits_per_sample(enum AVCodecID codec_id)
1859 {
1860 switch (codec_id) {
1861 case AV_CODEC_ID_ADPCM_SBPRO_2:
1862 return 2;
1863 case AV_CODEC_ID_ADPCM_SBPRO_3:
1864 return 3;
1865 case AV_CODEC_ID_ADPCM_SBPRO_4:
1866 case AV_CODEC_ID_ADPCM_IMA_WAV:
1867 case AV_CODEC_ID_ADPCM_IMA_QT:
1868 case AV_CODEC_ID_ADPCM_SWF:
1869 case AV_CODEC_ID_ADPCM_MS:
1870 return 4;
1871 default:
1872 return av_get_exact_bits_per_sample(codec_id);
1873 }
1874 }
1875
1876 int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
1877 {
1878 int id, sr, ch, ba, tag, bps;
1879
1880 id = avctx->codec_id;
1881 sr = avctx->sample_rate;
1882 ch = avctx->channels;
1883 ba = avctx->block_align;
1884 tag = avctx->codec_tag;
1885 bps = av_get_exact_bits_per_sample(avctx->codec_id);
1886
1887 /* codecs with an exact constant bits per sample */
1888 if (bps > 0 && ch > 0 && frame_bytes > 0)
1889 return (frame_bytes * 8) / (bps * ch);
1890 bps = avctx->bits_per_coded_sample;
1891
1892 /* codecs with a fixed packet duration */
1893 switch (id) {
1894 case AV_CODEC_ID_ADPCM_ADX: return 32;
1895 case AV_CODEC_ID_ADPCM_IMA_QT: return 64;
1896 case AV_CODEC_ID_ADPCM_EA_XAS: return 128;
1897 case AV_CODEC_ID_AMR_NB:
1898 case AV_CODEC_ID_GSM:
1899 case AV_CODEC_ID_QCELP:
1900 case AV_CODEC_ID_RA_144:
1901 case AV_CODEC_ID_RA_288: return 160;
1902 case AV_CODEC_ID_IMC: return 256;
1903 case AV_CODEC_ID_AMR_WB:
1904 case AV_CODEC_ID_GSM_MS: return 320;
1905 case AV_CODEC_ID_MP1: return 384;
1906 case AV_CODEC_ID_ATRAC1: return 512;
1907 case AV_CODEC_ID_ATRAC3: return 1024;
1908 case AV_CODEC_ID_MP2:
1909 case AV_CODEC_ID_MUSEPACK7: return 1152;
1910 case AV_CODEC_ID_AC3: return 1536;
1911 }
1912
1913 if (sr > 0) {
1914 /* calc from sample rate */
1915 if (id == AV_CODEC_ID_TTA)
1916 return 256 * sr / 245;
1917
1918 if (ch > 0) {
1919 /* calc from sample rate and channels */
1920 if (id == AV_CODEC_ID_BINKAUDIO_DCT)
1921 return (480 << (sr / 22050)) / ch;
1922 }
1923 }
1924
1925 if (ba > 0) {
1926 /* calc from block_align */
1927 if (id == AV_CODEC_ID_SIPR) {
1928 switch (ba) {
1929 case 20: return 160;
1930 case 19: return 144;
1931 case 29: return 288;
1932 case 37: return 480;
1933 }
1934 } else if (id == AV_CODEC_ID_ILBC) {
1935 switch (ba) {
1936 case 38: return 160;
1937 case 50: return 240;
1938 }
1939 }
1940 }
1941
1942 if (frame_bytes > 0) {
1943 /* calc from frame_bytes only */
1944 if (id == AV_CODEC_ID_TRUESPEECH)
1945 return 240 * (frame_bytes / 32);
1946 if (id == AV_CODEC_ID_NELLYMOSER)
1947 return 256 * (frame_bytes / 64);
1948
1949 if (bps > 0) {
1950 /* calc from frame_bytes and bits_per_coded_sample */
1951 if (id == AV_CODEC_ID_ADPCM_G726)
1952 return frame_bytes * 8 / bps;
1953 }
1954
1955 if (ch > 0) {
1956 /* calc from frame_bytes and channels */
1957 switch (id) {
1958 case AV_CODEC_ID_ADPCM_4XM:
1959 case AV_CODEC_ID_ADPCM_IMA_ISS:
1960 return (frame_bytes - 4 * ch) * 2 / ch;
1961 case AV_CODEC_ID_ADPCM_IMA_SMJPEG:
1962 return (frame_bytes - 4) * 2 / ch;
1963 case AV_CODEC_ID_ADPCM_IMA_AMV:
1964 return (frame_bytes - 8) * 2 / ch;
1965 case AV_CODEC_ID_ADPCM_XA:
1966 return (frame_bytes / 128) * 224 / ch;
1967 case AV_CODEC_ID_INTERPLAY_DPCM:
1968 return (frame_bytes - 6 - ch) / ch;
1969 case AV_CODEC_ID_ROQ_DPCM:
1970 return (frame_bytes - 8) / ch;
1971 case AV_CODEC_ID_XAN_DPCM:
1972 return (frame_bytes - 2 * ch) / ch;
1973 case AV_CODEC_ID_MACE3:
1974 return 3 * frame_bytes / ch;
1975 case AV_CODEC_ID_MACE6:
1976 return 6 * frame_bytes / ch;
1977 case AV_CODEC_ID_PCM_LXF:
1978 return 2 * (frame_bytes / (5 * ch));
1979 }
1980
1981 if (tag) {
1982 /* calc from frame_bytes, channels, and codec_tag */
1983 if (id == AV_CODEC_ID_SOL_DPCM) {
1984 if (tag == 3)
1985 return frame_bytes / ch;
1986 else
1987 return frame_bytes * 2 / ch;
1988 }
1989 }
1990
1991 if (ba > 0) {
1992 /* calc from frame_bytes, channels, and block_align */
1993 int blocks = frame_bytes / ba;
1994 switch (avctx->codec_id) {
1995 case AV_CODEC_ID_ADPCM_IMA_WAV:
1996 return blocks * (1 + (ba - 4 * ch) / (4 * ch) * 8);
1997 case AV_CODEC_ID_ADPCM_IMA_DK3:
1998 return blocks * (((ba - 16) * 2 / 3 * 4) / ch);
1999 case AV_CODEC_ID_ADPCM_IMA_DK4:
2000 return blocks * (1 + (ba - 4 * ch) * 2 / ch);
2001 case AV_CODEC_ID_ADPCM_MS:
2002 return blocks * (2 + (ba - 7 * ch) * 2 / ch);
2003 }
2004 }
2005
2006 if (bps > 0) {
2007 /* calc from frame_bytes, channels, and bits_per_coded_sample */
2008 switch (avctx->codec_id) {
2009 case AV_CODEC_ID_PCM_DVD:
2010 return 2 * (frame_bytes / ((bps * 2 / 8) * ch));
2011 case AV_CODEC_ID_PCM_BLURAY:
2012 return frame_bytes / ((FFALIGN(ch, 2) * bps) / 8);
2013 case AV_CODEC_ID_S302M:
2014 return 2 * (frame_bytes / ((bps + 4) / 4)) / ch;
2015 }
2016 }
2017 }
2018 }
2019
2020 return 0;
2021 }
2022
2023 #if !HAVE_THREADS
2024 int ff_thread_init(AVCodecContext *s)
2025 {
2026 return -1;
2027 }
2028
2029 #endif
2030
2031 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
2032 {
2033 unsigned int n = 0;
2034
2035 while (v >= 0xff) {
2036 *s++ = 0xff;
2037 v -= 0xff;
2038 n++;
2039 }
2040 *s = v;
2041 n++;
2042 return n;
2043 }
2044
2045 int ff_match_2uint16(const uint16_t(*tab)[2], int size, int a, int b)
2046 {
2047 int i;
2048 for (i = 0; i < size && !(tab[i][0] == a && tab[i][1] == b); i++) ;
2049 return i;
2050 }
2051
2052 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
2053 {
2054 av_log(avc, AV_LOG_WARNING, "%s is not implemented. Update your Libav "
2055 "version to the newest one from Git. If the problem still "
2056 "occurs, it means that your file has a feature which has not "
2057 "been implemented.\n", feature);
2058 if(want_sample)
2059 av_log_ask_for_sample(avc, NULL);
2060 }
2061
2062 void av_log_ask_for_sample(void *avc, const char *msg, ...)
2063 {
2064 va_list argument_list;
2065
2066 va_start(argument_list, msg);
2067
2068 if (msg)
2069 av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
2070 av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
2071 "of this file to ftp://upload.libav.org/incoming/ "
2072 "and contact the libav-devel mailing list.\n");
2073
2074 va_end(argument_list);
2075 }
2076
2077 static AVHWAccel *first_hwaccel = NULL;
2078
2079 void av_register_hwaccel(AVHWAccel *hwaccel)
2080 {
2081 AVHWAccel **p = &first_hwaccel;
2082 while (*p)
2083 p = &(*p)->next;
2084 *p = hwaccel;
2085 hwaccel->next = NULL;
2086 }
2087
2088 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
2089 {
2090 return hwaccel ? hwaccel->next : first_hwaccel;
2091 }
2092
2093 AVHWAccel *ff_find_hwaccel(enum AVCodecID codec_id, enum AVPixelFormat pix_fmt)
2094 {
2095 AVHWAccel *hwaccel = NULL;
2096
2097 while ((hwaccel = av_hwaccel_next(hwaccel)))
2098 if (hwaccel->id == codec_id
2099 && hwaccel->pix_fmt == pix_fmt)
2100 return hwaccel;
2101 return NULL;
2102 }
2103
2104 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
2105 {
2106 if (ff_lockmgr_cb) {
2107 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
2108 return -1;
2109 if (ff_lockmgr_cb(&avformat_mutex, AV_LOCK_DESTROY))
2110 return -1;
2111 }
2112
2113 ff_lockmgr_cb = cb;
2114
2115 if (ff_lockmgr_cb) {
2116 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
2117 return -1;
2118 if (ff_lockmgr_cb(&avformat_mutex, AV_LOCK_CREATE))
2119 return -1;
2120 }
2121 return 0;
2122 }
2123
2124 int avpriv_lock_avformat(void)
2125 {
2126 if (ff_lockmgr_cb) {
2127 if ((*ff_lockmgr_cb)(&avformat_mutex, AV_LOCK_OBTAIN))
2128 return -1;
2129 }
2130 return 0;
2131 }
2132
2133 int avpriv_unlock_avformat(void)
2134 {
2135 if (ff_lockmgr_cb) {
2136 if ((*ff_lockmgr_cb)(&avformat_mutex, AV_LOCK_RELEASE))
2137 return -1;
2138 }
2139 return 0;
2140 }
2141
2142 unsigned int avpriv_toupper4(unsigned int x)
2143 {
2144 return toupper(x & 0xFF)
2145 + (toupper((x >> 8) & 0xFF) << 8)
2146 + (toupper((x >> 16) & 0xFF) << 16)
2147 + (toupper((x >> 24) & 0xFF) << 24);
2148 }
2149
2150 #if !HAVE_THREADS
2151
2152 int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f)
2153 {
2154 f->owner = avctx;
2155 return avctx->get_buffer(avctx, f);
2156 }
2157
2158 void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f)
2159 {
2160 f->owner->release_buffer(f->owner, f);
2161 }
2162
2163 void ff_thread_finish_setup(AVCodecContext *avctx)
2164 {
2165 }
2166
2167 void ff_thread_report_progress(AVFrame *f, int progress, int field)
2168 {
2169 }
2170
2171 void ff_thread_await_progress(AVFrame *f, int progress, int field)
2172 {
2173 }
2174
2175 #endif
2176
2177 enum AVMediaType avcodec_get_type(enum AVCodecID codec_id)
2178 {
2179 if (codec_id <= AV_CODEC_ID_NONE)
2180 return AVMEDIA_TYPE_UNKNOWN;
2181 else if (codec_id < AV_CODEC_ID_FIRST_AUDIO)
2182 return AVMEDIA_TYPE_VIDEO;
2183 else if (codec_id < AV_CODEC_ID_FIRST_SUBTITLE)
2184 return AVMEDIA_TYPE_AUDIO;
2185 else if (codec_id < AV_CODEC_ID_FIRST_UNKNOWN)
2186 return AVMEDIA_TYPE_SUBTITLE;
2187
2188 return AVMEDIA_TYPE_UNKNOWN;
2189 }
2190
2191 int avcodec_is_open(AVCodecContext *s)
2192 {
2193 return !!s->internal;
2194 }