3 * Copyright (c) 2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of Libav.
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.
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.
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
29 #include "libavutil/attributes.h"
30 #include "libavutil/avassert.h"
31 #include "libavutil/avstring.h"
32 #include "libavutil/channel_layout.h"
33 #include "libavutil/crc.h"
34 #include "libavutil/frame.h"
35 #include "libavutil/internal.h"
36 #include "libavutil/mathematics.h"
37 #include "libavutil/pixdesc.h"
38 #include "libavutil/imgutils.h"
39 #include "libavutil/samplefmt.h"
40 #include "libavutil/dict.h"
43 #include "libavutil/opt.h"
46 #include "bytestream.h"
53 static int volatile entangled_thread_counter = 0;
54 static int (*lockmgr_cb)(void **mutex, enum AVLockOp op);
55 static void *codec_mutex;
56 static void *avformat_mutex;
58 #if FF_API_FAST_MALLOC && CONFIG_SHARED && HAVE_SYMVER
59 FF_SYMVER(void*, av_fast_realloc, (void *ptr, unsigned int *size, size_t min_size), "LIBAVCODEC_55")
61 return av_fast_realloc(ptr, size, min_size);
64 FF_SYMVER(void, av_fast_malloc, (void *ptr, unsigned int *size, size_t min_size), "LIBAVCODEC_55")
66 av_fast_malloc(ptr, size, min_size);
70 void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
73 if (min_size > SIZE_MAX - FF_INPUT_BUFFER_PADDING_SIZE) {
78 av_fast_malloc(p, size, min_size + FF_INPUT_BUFFER_PADDING_SIZE);
80 memset((uint8_t *)*p + min_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
83 /* encoder management */
84 static AVCodec *first_avcodec = NULL;
86 AVCodec *av_codec_next(const AVCodec *c)
94 static av_cold void avcodec_init(void)
96 static int initialized = 0;
103 ff_dsputil_static_init();
106 int av_codec_is_encoder(const AVCodec *codec)
108 return codec && (codec->encode_sub || codec->encode2);
111 int av_codec_is_decoder(const AVCodec *codec)
113 return codec && codec->decode;
116 av_cold void avcodec_register(AVCodec *codec)
126 if (codec->init_static_data)
127 codec->init_static_data(codec);
130 unsigned avcodec_get_edge_width(void)
135 #if FF_API_SET_DIMENSIONS
136 void avcodec_set_dimensions(AVCodecContext *s, int width, int height)
138 ff_set_dimensions(s, width, height);
142 int ff_set_dimensions(AVCodecContext *s, int width, int height)
144 int ret = av_image_check_size(width, height, 0, s);
148 s->width = s->coded_width = width;
149 s->height = s->coded_height = height;
154 #if HAVE_NEON || ARCH_PPC || HAVE_MMX
155 # define STRIDE_ALIGN 16
157 # define STRIDE_ALIGN 8
160 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
161 int linesize_align[AV_NUM_DATA_POINTERS])
167 switch (s->pix_fmt) {
168 case AV_PIX_FMT_YUV420P:
169 case AV_PIX_FMT_YUYV422:
170 case AV_PIX_FMT_UYVY422:
171 case AV_PIX_FMT_YUV422P:
172 case AV_PIX_FMT_YUV440P:
173 case AV_PIX_FMT_YUV444P:
174 case AV_PIX_FMT_GBRP:
175 case AV_PIX_FMT_GRAY8:
176 case AV_PIX_FMT_GRAY16BE:
177 case AV_PIX_FMT_GRAY16LE:
178 case AV_PIX_FMT_YUVJ420P:
179 case AV_PIX_FMT_YUVJ422P:
180 case AV_PIX_FMT_YUVJ440P:
181 case AV_PIX_FMT_YUVJ444P:
182 case AV_PIX_FMT_YUVA420P:
183 case AV_PIX_FMT_YUVA422P:
184 case AV_PIX_FMT_YUVA444P:
185 case AV_PIX_FMT_YUV420P9LE:
186 case AV_PIX_FMT_YUV420P9BE:
187 case AV_PIX_FMT_YUV420P10LE:
188 case AV_PIX_FMT_YUV420P10BE:
189 case AV_PIX_FMT_YUV422P9LE:
190 case AV_PIX_FMT_YUV422P9BE:
191 case AV_PIX_FMT_YUV422P10LE:
192 case AV_PIX_FMT_YUV422P10BE:
193 case AV_PIX_FMT_YUV444P9LE:
194 case AV_PIX_FMT_YUV444P9BE:
195 case AV_PIX_FMT_YUV444P10LE:
196 case AV_PIX_FMT_YUV444P10BE:
197 case AV_PIX_FMT_GBRP9LE:
198 case AV_PIX_FMT_GBRP9BE:
199 case AV_PIX_FMT_GBRP10LE:
200 case AV_PIX_FMT_GBRP10BE:
201 w_align = 16; //FIXME assume 16 pixel per macroblock
202 h_align = 16 * 2; // interlaced needs 2 macroblocks height
204 case AV_PIX_FMT_YUV411P:
205 case AV_PIX_FMT_UYYVYY411:
209 case AV_PIX_FMT_YUV410P:
210 if (s->codec_id == AV_CODEC_ID_SVQ1) {
214 case AV_PIX_FMT_RGB555:
215 if (s->codec_id == AV_CODEC_ID_RPZA) {
219 case AV_PIX_FMT_PAL8:
220 case AV_PIX_FMT_BGR8:
221 case AV_PIX_FMT_RGB8:
222 if (s->codec_id == AV_CODEC_ID_SMC) {
227 case AV_PIX_FMT_BGR24:
228 if ((s->codec_id == AV_CODEC_ID_MSZH) ||
229 (s->codec_id == AV_CODEC_ID_ZLIB)) {
240 *width = FFALIGN(*width, w_align);
241 *height = FFALIGN(*height, h_align);
242 if (s->codec_id == AV_CODEC_ID_H264)
243 // some of the optimized chroma MC reads one line too much
246 for (i = 0; i < 4; i++)
247 linesize_align[i] = STRIDE_ALIGN;
250 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height)
252 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(s->pix_fmt);
253 int chroma_shift = desc->log2_chroma_w;
254 int linesize_align[AV_NUM_DATA_POINTERS];
257 avcodec_align_dimensions2(s, width, height, linesize_align);
258 align = FFMAX(linesize_align[0], linesize_align[3]);
259 linesize_align[1] <<= chroma_shift;
260 linesize_align[2] <<= chroma_shift;
261 align = FFMAX3(align, linesize_align[1], linesize_align[2]);
262 *width = FFALIGN(*width, align);
265 int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
266 enum AVSampleFormat sample_fmt, const uint8_t *buf,
267 int buf_size, int align)
269 int ch, planar, needed_size, ret = 0;
271 needed_size = av_samples_get_buffer_size(NULL, nb_channels,
272 frame->nb_samples, sample_fmt,
274 if (buf_size < needed_size)
275 return AVERROR(EINVAL);
277 planar = av_sample_fmt_is_planar(sample_fmt);
278 if (planar && nb_channels > AV_NUM_DATA_POINTERS) {
279 if (!(frame->extended_data = av_mallocz(nb_channels *
280 sizeof(*frame->extended_data))))
281 return AVERROR(ENOMEM);
283 frame->extended_data = frame->data;
286 if ((ret = av_samples_fill_arrays(frame->extended_data, &frame->linesize[0],
287 buf, nb_channels, frame->nb_samples,
288 sample_fmt, align)) < 0) {
289 if (frame->extended_data != frame->data)
290 av_free(frame->extended_data);
293 if (frame->extended_data != frame->data) {
294 for (ch = 0; ch < AV_NUM_DATA_POINTERS; ch++)
295 frame->data[ch] = frame->extended_data[ch];
301 static int update_frame_pool(AVCodecContext *avctx, AVFrame *frame)
303 FramePool *pool = avctx->internal->pool;
306 switch (avctx->codec_type) {
307 case AVMEDIA_TYPE_VIDEO: {
310 int w = frame->width;
311 int h = frame->height;
312 int tmpsize, unaligned;
314 if (pool->format == frame->format &&
315 pool->width == frame->width && pool->height == frame->height)
318 avcodec_align_dimensions2(avctx, &w, &h, pool->stride_align);
320 if (!(avctx->flags & CODEC_FLAG_EMU_EDGE)) {
326 // NOTE: do not align linesizes individually, this breaks e.g. assumptions
327 // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
328 av_image_fill_linesizes(picture.linesize, avctx->pix_fmt, w);
329 // increase alignment of w for next try (rhs gives the lowest bit set in w)
333 for (i = 0; i < 4; i++)
334 unaligned |= picture.linesize[i] % pool->stride_align[i];
337 tmpsize = av_image_fill_pointers(picture.data, avctx->pix_fmt, h,
338 NULL, picture.linesize);
342 for (i = 0; i < 3 && picture.data[i + 1]; i++)
343 size[i] = picture.data[i + 1] - picture.data[i];
344 size[i] = tmpsize - (picture.data[i] - picture.data[0]);
346 for (i = 0; i < 4; i++) {
347 av_buffer_pool_uninit(&pool->pools[i]);
348 pool->linesize[i] = picture.linesize[i];
350 pool->pools[i] = av_buffer_pool_init(size[i] + 16, NULL);
351 if (!pool->pools[i]) {
352 ret = AVERROR(ENOMEM);
357 pool->format = frame->format;
358 pool->width = frame->width;
359 pool->height = frame->height;
363 case AVMEDIA_TYPE_AUDIO: {
364 int ch = av_get_channel_layout_nb_channels(frame->channel_layout);
365 int planar = av_sample_fmt_is_planar(frame->format);
366 int planes = planar ? ch : 1;
368 if (pool->format == frame->format && pool->planes == planes &&
369 pool->channels == ch && frame->nb_samples == pool->samples)
372 av_buffer_pool_uninit(&pool->pools[0]);
373 ret = av_samples_get_buffer_size(&pool->linesize[0], ch,
374 frame->nb_samples, frame->format, 0);
378 pool->pools[0] = av_buffer_pool_init(pool->linesize[0], NULL);
379 if (!pool->pools[0]) {
380 ret = AVERROR(ENOMEM);
384 pool->format = frame->format;
385 pool->planes = planes;
387 pool->samples = frame->nb_samples;
390 default: av_assert0(0);
394 for (i = 0; i < 4; i++)
395 av_buffer_pool_uninit(&pool->pools[i]);
397 pool->planes = pool->channels = pool->samples = 0;
398 pool->width = pool->height = 0;
402 static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
404 FramePool *pool = avctx->internal->pool;
405 int planes = pool->planes;
408 frame->linesize[0] = pool->linesize[0];
410 if (planes > AV_NUM_DATA_POINTERS) {
411 frame->extended_data = av_mallocz(planes * sizeof(*frame->extended_data));
412 frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS;
413 frame->extended_buf = av_mallocz(frame->nb_extended_buf *
414 sizeof(*frame->extended_buf));
415 if (!frame->extended_data || !frame->extended_buf) {
416 av_freep(&frame->extended_data);
417 av_freep(&frame->extended_buf);
418 return AVERROR(ENOMEM);
421 frame->extended_data = frame->data;
423 for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) {
424 frame->buf[i] = av_buffer_pool_get(pool->pools[0]);
427 frame->extended_data[i] = frame->data[i] = frame->buf[i]->data;
429 for (i = 0; i < frame->nb_extended_buf; i++) {
430 frame->extended_buf[i] = av_buffer_pool_get(pool->pools[0]);
431 if (!frame->extended_buf[i])
433 frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data;
436 if (avctx->debug & FF_DEBUG_BUFFERS)
437 av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p", frame);
441 av_frame_unref(frame);
442 return AVERROR(ENOMEM);
445 static int video_get_buffer(AVCodecContext *s, AVFrame *pic)
447 FramePool *pool = s->internal->pool;
448 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pic->format);
449 int pixel_size = desc->comp[0].step_minus1 + 1;
450 int h_chroma_shift, v_chroma_shift;
453 if (pic->data[0] != NULL) {
454 av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
458 memset(pic->data, 0, sizeof(pic->data));
459 pic->extended_data = pic->data;
461 av_pix_fmt_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
463 for (i = 0; i < 4 && pool->pools[i]; i++) {
464 const int h_shift = i == 0 ? 0 : h_chroma_shift;
465 const int v_shift = i == 0 ? 0 : v_chroma_shift;
467 pic->linesize[i] = pool->linesize[i];
469 pic->buf[i] = av_buffer_pool_get(pool->pools[i]);
473 // no edge if EDGE EMU or not planar YUV
474 if ((s->flags & CODEC_FLAG_EMU_EDGE) || !pool->pools[2])
475 pic->data[i] = pic->buf[i]->data;
477 pic->data[i] = pic->buf[i]->data +
478 FFALIGN((pic->linesize[i] * EDGE_WIDTH >> v_shift) +
479 (pixel_size * EDGE_WIDTH >> h_shift), pool->stride_align[i]);
482 for (; i < AV_NUM_DATA_POINTERS; i++) {
484 pic->linesize[i] = 0;
486 if (pic->data[1] && !pic->data[2])
487 avpriv_set_systematic_pal2((uint32_t *)pic->data[1], s->pix_fmt);
489 if (s->debug & FF_DEBUG_BUFFERS)
490 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p\n", pic);
495 return AVERROR(ENOMEM);
498 int avcodec_default_get_buffer2(AVCodecContext *avctx, AVFrame *frame, int flags)
502 if ((ret = update_frame_pool(avctx, frame)) < 0)
505 #if FF_API_GET_BUFFER
506 FF_DISABLE_DEPRECATION_WARNINGS
507 frame->type = FF_BUFFER_TYPE_INTERNAL;
508 FF_ENABLE_DEPRECATION_WARNINGS
511 switch (avctx->codec_type) {
512 case AVMEDIA_TYPE_VIDEO:
513 return video_get_buffer(avctx, frame);
514 case AVMEDIA_TYPE_AUDIO:
515 return audio_get_buffer(avctx, frame);
521 #if FF_API_GET_BUFFER
522 FF_DISABLE_DEPRECATION_WARNINGS
523 int avcodec_default_get_buffer(AVCodecContext *avctx, AVFrame *frame)
525 return avcodec_default_get_buffer2(avctx, frame, 0);
528 typedef struct CompatReleaseBufPriv {
529 AVCodecContext avctx;
531 } CompatReleaseBufPriv;
533 static void compat_free_buffer(void *opaque, uint8_t *data)
535 CompatReleaseBufPriv *priv = opaque;
536 if (priv->avctx.release_buffer)
537 priv->avctx.release_buffer(&priv->avctx, &priv->frame);
541 static void compat_release_buffer(void *opaque, uint8_t *data)
543 AVBufferRef *buf = opaque;
544 av_buffer_unref(&buf);
546 FF_ENABLE_DEPRECATION_WARNINGS
549 int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
553 switch (avctx->codec_type) {
554 case AVMEDIA_TYPE_VIDEO:
555 frame->width = FFMAX(avctx->width, avctx->coded_width);
556 frame->height = FFMAX(avctx->height, avctx->coded_height);
557 if (frame->format < 0)
558 frame->format = avctx->pix_fmt;
559 if (!frame->sample_aspect_ratio.num)
560 frame->sample_aspect_ratio = avctx->sample_aspect_ratio;
562 if ((ret = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
565 case AVMEDIA_TYPE_AUDIO:
566 if (!frame->sample_rate)
567 frame->sample_rate = avctx->sample_rate;
568 if (frame->format < 0)
569 frame->format = avctx->sample_fmt;
570 if (!frame->channel_layout) {
571 if (avctx->channel_layout) {
572 if (av_get_channel_layout_nb_channels(avctx->channel_layout) !=
574 av_log(avctx, AV_LOG_ERROR, "Inconsistent channel "
576 return AVERROR(EINVAL);
579 frame->channel_layout = avctx->channel_layout;
581 if (avctx->channels > FF_SANE_NB_CHANNELS) {
582 av_log(avctx, AV_LOG_ERROR, "Too many channels: %d.\n",
584 return AVERROR(ENOSYS);
587 frame->channel_layout = av_get_default_channel_layout(avctx->channels);
588 if (!frame->channel_layout)
589 frame->channel_layout = (1ULL << avctx->channels) - 1;
593 default: return AVERROR(EINVAL);
596 frame->pkt_pts = avctx->internal->pkt ? avctx->internal->pkt->pts : AV_NOPTS_VALUE;
597 frame->reordered_opaque = avctx->reordered_opaque;
599 #if FF_API_GET_BUFFER
600 FF_DISABLE_DEPRECATION_WARNINGS
602 * Wrap an old get_buffer()-allocated buffer in an bunch of AVBuffers.
603 * We wrap each plane in its own AVBuffer. Each of those has a reference to
604 * a dummy AVBuffer as its private data, unreffing it on free.
605 * When all the planes are freed, the dummy buffer's free callback calls
608 if (avctx->get_buffer) {
609 CompatReleaseBufPriv *priv = NULL;
610 AVBufferRef *dummy_buf = NULL;
613 if (flags & AV_GET_BUFFER_FLAG_REF)
614 frame->reference = 1;
616 ret = avctx->get_buffer(avctx, frame);
620 /* return if the buffers are already set up
621 * this would happen e.g. when a custom get_buffer() calls
622 * avcodec_default_get_buffer
627 priv = av_mallocz(sizeof(*priv));
629 ret = AVERROR(ENOMEM);
632 priv->avctx = *avctx;
633 priv->frame = *frame;
635 dummy_buf = av_buffer_create(NULL, 0, compat_free_buffer, priv, 0);
637 ret = AVERROR(ENOMEM);
641 #define WRAP_PLANE(ref_out, data, data_size) \
643 AVBufferRef *dummy_ref = av_buffer_ref(dummy_buf); \
645 ret = AVERROR(ENOMEM); \
648 ref_out = av_buffer_create(data, data_size, compat_release_buffer, \
651 av_frame_unref(frame); \
652 ret = AVERROR(ENOMEM); \
657 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
658 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
660 planes = av_pix_fmt_count_planes(frame->format);
661 /* workaround for AVHWAccel plane count of 0, buf[0] is used as
662 check for allocated buffers: make libavcodec happy */
663 if (desc && desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
665 if (!desc || planes <= 0) {
666 ret = AVERROR(EINVAL);
670 for (i = 0; i < planes; i++) {
671 int v_shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
672 int plane_size = (frame->height >> v_shift) * frame->linesize[i];
674 WRAP_PLANE(frame->buf[i], frame->data[i], plane_size);
677 int planar = av_sample_fmt_is_planar(frame->format);
678 planes = planar ? avctx->channels : 1;
680 if (planes > FF_ARRAY_ELEMS(frame->buf)) {
681 frame->nb_extended_buf = planes - FF_ARRAY_ELEMS(frame->buf);
682 frame->extended_buf = av_malloc(sizeof(*frame->extended_buf) *
683 frame->nb_extended_buf);
684 if (!frame->extended_buf) {
685 ret = AVERROR(ENOMEM);
690 for (i = 0; i < FFMIN(planes, FF_ARRAY_ELEMS(frame->buf)); i++)
691 WRAP_PLANE(frame->buf[i], frame->extended_data[i], frame->linesize[0]);
693 for (i = 0; i < frame->nb_extended_buf; i++)
694 WRAP_PLANE(frame->extended_buf[i],
695 frame->extended_data[i + FF_ARRAY_ELEMS(frame->buf)],
699 av_buffer_unref(&dummy_buf);
701 frame->width = avctx->width;
702 frame->height = avctx->height;
707 avctx->release_buffer(avctx, frame);
709 av_buffer_unref(&dummy_buf);
712 FF_ENABLE_DEPRECATION_WARNINGS
715 ret = avctx->get_buffer2(avctx, frame, flags);
717 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
718 frame->width = avctx->width;
719 frame->height = avctx->height;
725 int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame)
730 av_assert0(avctx->codec_type == AVMEDIA_TYPE_VIDEO);
733 return ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
735 if (av_frame_is_writable(frame))
738 av_frame_move_ref(&tmp, frame);
740 ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
742 av_frame_unref(&tmp);
746 av_image_copy(frame->data, frame->linesize, tmp.data, tmp.linesize,
747 frame->format, frame->width, frame->height);
749 av_frame_unref(&tmp);
754 #if FF_API_GET_BUFFER
755 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic)
760 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic)
767 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size)
771 for (i = 0; i < count; i++) {
772 int r = func(c, (char *)arg + i * size);
779 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr), void *arg, int *ret, int count)
783 for (i = 0; i < count; i++) {
784 int r = func(c, arg, i, 0);
791 static int is_hwaccel_pix_fmt(enum AVPixelFormat pix_fmt)
793 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
794 return desc->flags & AV_PIX_FMT_FLAG_HWACCEL;
797 enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
799 while (*fmt != AV_PIX_FMT_NONE && is_hwaccel_pix_fmt(*fmt))
804 void avcodec_get_frame_defaults(AVFrame *frame)
806 if (frame->extended_data != frame->data)
807 av_freep(&frame->extended_data);
809 memset(frame, 0, sizeof(AVFrame));
811 frame->pts = AV_NOPTS_VALUE;
812 frame->key_frame = 1;
813 frame->sample_aspect_ratio = (AVRational) {0, 1 };
814 frame->format = -1; /* unknown */
815 frame->extended_data = frame->data;
818 #if FF_API_AVFRAME_LAVC
819 AVFrame *avcodec_alloc_frame(void)
821 AVFrame *frame = av_mallocz(sizeof(AVFrame));
826 avcodec_get_frame_defaults(frame);
832 void avcodec_free_frame(AVFrame **frame)
836 if (!frame || !*frame)
841 if (f->extended_data != f->data)
842 av_freep(&f->extended_data);
847 int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
850 AVDictionary *tmp = NULL;
852 if (avcodec_is_open(avctx))
855 if ((!codec && !avctx->codec)) {
856 av_log(avctx, AV_LOG_ERROR, "No codec provided to avcodec_open2().\n");
857 return AVERROR(EINVAL);
859 if ((codec && avctx->codec && codec != avctx->codec)) {
860 av_log(avctx, AV_LOG_ERROR, "This AVCodecContext was allocated for %s, "
861 "but %s passed to avcodec_open2().\n", avctx->codec->name, codec->name);
862 return AVERROR(EINVAL);
865 codec = avctx->codec;
867 if (avctx->extradata_size < 0 || avctx->extradata_size >= FF_MAX_EXTRADATA_SIZE)
868 return AVERROR(EINVAL);
871 av_dict_copy(&tmp, *options, 0);
873 /* If there is a user-supplied mutex locking routine, call it. */
875 if ((*lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
879 entangled_thread_counter++;
880 if (entangled_thread_counter != 1) {
881 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
886 avctx->internal = av_mallocz(sizeof(AVCodecInternal));
887 if (!avctx->internal) {
888 ret = AVERROR(ENOMEM);
892 avctx->internal->pool = av_mallocz(sizeof(*avctx->internal->pool));
893 if (!avctx->internal->pool) {
894 ret = AVERROR(ENOMEM);
898 if (codec->priv_data_size > 0) {
899 if (!avctx->priv_data) {
900 avctx->priv_data = av_mallocz(codec->priv_data_size);
901 if (!avctx->priv_data) {
902 ret = AVERROR(ENOMEM);
905 if (codec->priv_class) {
906 *(const AVClass **)avctx->priv_data = codec->priv_class;
907 av_opt_set_defaults(avctx->priv_data);
910 if (codec->priv_class && (ret = av_opt_set_dict(avctx->priv_data, &tmp)) < 0)
913 avctx->priv_data = NULL;
915 if ((ret = av_opt_set_dict(avctx, &tmp)) < 0)
918 if (avctx->coded_width && avctx->coded_height && !avctx->width && !avctx->height)
919 ret = ff_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
920 else if (avctx->width && avctx->height)
921 ret = ff_set_dimensions(avctx, avctx->width, avctx->height);
925 if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
926 && ( av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0
927 || av_image_check_size(avctx->width, avctx->height, 0, avctx) < 0)) {
928 av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n");
929 ff_set_dimensions(avctx, 0, 0);
932 /* if the decoder init function was already called previously,
933 * free the already allocated subtitle_header before overwriting it */
934 if (av_codec_is_decoder(codec))
935 av_freep(&avctx->subtitle_header);
937 if (avctx->channels > FF_SANE_NB_CHANNELS) {
938 ret = AVERROR(EINVAL);
942 avctx->codec = codec;
943 if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
944 avctx->codec_id == AV_CODEC_ID_NONE) {
945 avctx->codec_type = codec->type;
946 avctx->codec_id = codec->id;
948 if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type
949 && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
950 av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
951 ret = AVERROR(EINVAL);
954 avctx->frame_number = 0;
956 if (avctx->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
957 avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
958 ret = AVERROR_EXPERIMENTAL;
962 if (avctx->codec_type == AVMEDIA_TYPE_AUDIO &&
963 (!avctx->time_base.num || !avctx->time_base.den)) {
964 avctx->time_base.num = 1;
965 avctx->time_base.den = avctx->sample_rate;
969 ret = ff_thread_init(avctx);
974 if (!HAVE_THREADS && !(codec->capabilities & CODEC_CAP_AUTO_THREADS))
975 avctx->thread_count = 1;
977 if (av_codec_is_encoder(avctx->codec)) {
979 if (avctx->codec->sample_fmts) {
980 for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++) {
981 if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
983 if (avctx->channels == 1 &&
984 av_get_planar_sample_fmt(avctx->sample_fmt) ==
985 av_get_planar_sample_fmt(avctx->codec->sample_fmts[i])) {
986 avctx->sample_fmt = avctx->codec->sample_fmts[i];
990 if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
991 av_log(avctx, AV_LOG_ERROR, "Specified sample_fmt is not supported.\n");
992 ret = AVERROR(EINVAL);
996 if (avctx->codec->pix_fmts) {
997 for (i = 0; avctx->codec->pix_fmts[i] != AV_PIX_FMT_NONE; i++)
998 if (avctx->pix_fmt == avctx->codec->pix_fmts[i])
1000 if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_NONE) {
1001 av_log(avctx, AV_LOG_ERROR, "Specified pix_fmt is not supported\n");
1002 ret = AVERROR(EINVAL);
1006 if (avctx->codec->supported_samplerates) {
1007 for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)
1008 if (avctx->sample_rate == avctx->codec->supported_samplerates[i])
1010 if (avctx->codec->supported_samplerates[i] == 0) {
1011 av_log(avctx, AV_LOG_ERROR, "Specified sample_rate is not supported\n");
1012 ret = AVERROR(EINVAL);
1016 if (avctx->codec->channel_layouts) {
1017 if (!avctx->channel_layout) {
1018 av_log(avctx, AV_LOG_WARNING, "channel_layout not specified\n");
1020 for (i = 0; avctx->codec->channel_layouts[i] != 0; i++)
1021 if (avctx->channel_layout == avctx->codec->channel_layouts[i])
1023 if (avctx->codec->channel_layouts[i] == 0) {
1024 av_log(avctx, AV_LOG_ERROR, "Specified channel_layout is not supported\n");
1025 ret = AVERROR(EINVAL);
1030 if (avctx->channel_layout && avctx->channels) {
1031 if (av_get_channel_layout_nb_channels(avctx->channel_layout) != avctx->channels) {
1032 av_log(avctx, AV_LOG_ERROR, "channel layout does not match number of channels\n");
1033 ret = AVERROR(EINVAL);
1036 } else if (avctx->channel_layout) {
1037 avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
1040 if (!avctx->rc_initial_buffer_occupancy)
1041 avctx->rc_initial_buffer_occupancy = avctx->rc_buffer_size * 3 / 4;
1044 if (avctx->codec->init && !(avctx->active_thread_type & FF_THREAD_FRAME)) {
1045 ret = avctx->codec->init(avctx);
1051 if (av_codec_is_decoder(avctx->codec)) {
1052 /* validate channel layout from the decoder */
1053 if (avctx->channel_layout) {
1054 int channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
1055 if (!avctx->channels)
1056 avctx->channels = channels;
1057 else if (channels != avctx->channels) {
1058 av_log(avctx, AV_LOG_WARNING,
1059 "channel layout does not match number of channels\n");
1060 avctx->channel_layout = 0;
1063 if (avctx->channels && avctx->channels < 0 ||
1064 avctx->channels > FF_SANE_NB_CHANNELS) {
1065 ret = AVERROR(EINVAL);
1070 entangled_thread_counter--;
1072 /* Release any user-supplied mutex. */
1074 (*lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
1077 av_dict_free(options);
1084 av_freep(&avctx->priv_data);
1085 if (avctx->internal)
1086 av_freep(&avctx->internal->pool);
1087 av_freep(&avctx->internal);
1088 avctx->codec = NULL;
1092 int ff_alloc_packet(AVPacket *avpkt, int size)
1094 if (size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE)
1095 return AVERROR(EINVAL);
1098 AVBufferRef *buf = avpkt->buf;
1099 #if FF_API_DESTRUCT_PACKET
1100 FF_DISABLE_DEPRECATION_WARNINGS
1101 void *destruct = avpkt->destruct;
1102 FF_ENABLE_DEPRECATION_WARNINGS
1105 if (avpkt->size < size)
1106 return AVERROR(EINVAL);
1108 av_init_packet(avpkt);
1109 #if FF_API_DESTRUCT_PACKET
1110 FF_DISABLE_DEPRECATION_WARNINGS
1111 avpkt->destruct = destruct;
1112 FF_ENABLE_DEPRECATION_WARNINGS
1118 return av_new_packet(avpkt, size);
1123 * Pad last frame with silence.
1125 static int pad_last_frame(AVCodecContext *s, AVFrame **dst, const AVFrame *src)
1127 AVFrame *frame = NULL;
1130 if (!(frame = av_frame_alloc()))
1131 return AVERROR(ENOMEM);
1133 frame->format = src->format;
1134 frame->channel_layout = src->channel_layout;
1135 frame->nb_samples = s->frame_size;
1136 ret = av_frame_get_buffer(frame, 32);
1140 ret = av_frame_copy_props(frame, src);
1144 if ((ret = av_samples_copy(frame->extended_data, src->extended_data, 0, 0,
1145 src->nb_samples, s->channels, s->sample_fmt)) < 0)
1147 if ((ret = av_samples_set_silence(frame->extended_data, src->nb_samples,
1148 frame->nb_samples - src->nb_samples,
1149 s->channels, s->sample_fmt)) < 0)
1157 av_frame_free(&frame);
1161 int attribute_align_arg avcodec_encode_audio2(AVCodecContext *avctx,
1163 const AVFrame *frame,
1164 int *got_packet_ptr)
1167 AVFrame *padded_frame = NULL;
1169 int user_packet = !!avpkt->data;
1171 *got_packet_ptr = 0;
1173 if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) {
1174 av_free_packet(avpkt);
1175 av_init_packet(avpkt);
1179 /* ensure that extended_data is properly set */
1180 if (frame && !frame->extended_data) {
1181 if (av_sample_fmt_is_planar(avctx->sample_fmt) &&
1182 avctx->channels > AV_NUM_DATA_POINTERS) {
1183 av_log(avctx, AV_LOG_ERROR, "Encoding to a planar sample format, "
1184 "with more than %d channels, but extended_data is not set.\n",
1185 AV_NUM_DATA_POINTERS);
1186 return AVERROR(EINVAL);
1188 av_log(avctx, AV_LOG_WARNING, "extended_data is not set.\n");
1191 tmp.extended_data = tmp.data;
1195 /* check for valid frame size */
1197 if (avctx->codec->capabilities & CODEC_CAP_SMALL_LAST_FRAME) {
1198 if (frame->nb_samples > avctx->frame_size)
1199 return AVERROR(EINVAL);
1200 } else if (!(avctx->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)) {
1201 if (frame->nb_samples < avctx->frame_size &&
1202 !avctx->internal->last_audio_frame) {
1203 ret = pad_last_frame(avctx, &padded_frame, frame);
1207 frame = padded_frame;
1208 avctx->internal->last_audio_frame = 1;
1211 if (frame->nb_samples != avctx->frame_size) {
1212 ret = AVERROR(EINVAL);
1218 ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
1220 if (*got_packet_ptr) {
1221 if (!(avctx->codec->capabilities & CODEC_CAP_DELAY)) {
1222 if (avpkt->pts == AV_NOPTS_VALUE)
1223 avpkt->pts = frame->pts;
1224 if (!avpkt->duration)
1225 avpkt->duration = ff_samples_to_time_base(avctx,
1228 avpkt->dts = avpkt->pts;
1233 if (!user_packet && avpkt->size) {
1234 ret = av_buffer_realloc(&avpkt->buf, avpkt->size);
1236 avpkt->data = avpkt->buf->data;
1239 avctx->frame_number++;
1242 if (ret < 0 || !*got_packet_ptr) {
1243 av_free_packet(avpkt);
1244 av_init_packet(avpkt);
1248 /* NOTE: if we add any audio encoders which output non-keyframe packets,
1249 * this needs to be moved to the encoders, but for now we can do it
1250 * here to simplify things */
1251 avpkt->flags |= AV_PKT_FLAG_KEY;
1254 av_frame_free(&padded_frame);
1259 int attribute_align_arg avcodec_encode_video2(AVCodecContext *avctx,
1261 const AVFrame *frame,
1262 int *got_packet_ptr)
1265 int user_packet = !!avpkt->data;
1267 *got_packet_ptr = 0;
1269 if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) {
1270 av_free_packet(avpkt);
1271 av_init_packet(avpkt);
1276 if (av_image_check_size(avctx->width, avctx->height, 0, avctx))
1277 return AVERROR(EINVAL);
1279 av_assert0(avctx->codec->encode2);
1281 ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
1283 if (!*got_packet_ptr)
1285 else if (!(avctx->codec->capabilities & CODEC_CAP_DELAY))
1286 avpkt->pts = avpkt->dts = frame->pts;
1288 if (!user_packet && avpkt->size) {
1289 ret = av_buffer_realloc(&avpkt->buf, avpkt->size);
1291 avpkt->data = avpkt->buf->data;
1294 avctx->frame_number++;
1297 if (ret < 0 || !*got_packet_ptr)
1298 av_free_packet(avpkt);
1304 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1305 const AVSubtitle *sub)
1308 if (sub->start_display_time) {
1309 av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
1312 if (sub->num_rects == 0 || !sub->rects)
1314 ret = avctx->codec->encode_sub(avctx, buf, buf_size, sub);
1315 avctx->frame_number++;
1319 static int apply_param_change(AVCodecContext *avctx, AVPacket *avpkt)
1322 const uint8_t *data;
1325 data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size);
1329 if (!(avctx->codec->capabilities & CODEC_CAP_PARAM_CHANGE)) {
1330 av_log(avctx, AV_LOG_ERROR, "This decoder does not support parameter "
1331 "changes, but PARAM_CHANGE side data was sent to it.\n");
1332 return AVERROR(EINVAL);
1338 flags = bytestream_get_le32(&data);
1341 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) {
1344 avctx->channels = bytestream_get_le32(&data);
1347 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) {
1350 avctx->channel_layout = bytestream_get_le64(&data);
1353 if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) {
1356 avctx->sample_rate = bytestream_get_le32(&data);
1359 if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) {
1362 avctx->width = bytestream_get_le32(&data);
1363 avctx->height = bytestream_get_le32(&data);
1365 ret = ff_set_dimensions(avctx, avctx->width, avctx->height);
1372 av_log(avctx, AV_LOG_ERROR, "PARAM_CHANGE side data too small.\n");
1373 return AVERROR_INVALIDDATA;
1376 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
1377 int *got_picture_ptr,
1380 AVCodecInternal *avci = avctx->internal;
1383 *got_picture_ptr = 0;
1384 if ((avctx->coded_width || avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
1387 avctx->internal->pkt = avpkt;
1388 ret = apply_param_change(avctx, avpkt);
1390 av_log(avctx, AV_LOG_ERROR, "Error applying parameter changes.\n");
1391 if (avctx->err_recognition & AV_EF_EXPLODE)
1395 avcodec_get_frame_defaults(picture);
1397 if (!avctx->refcounted_frames)
1398 av_frame_unref(&avci->to_free);
1400 if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type & FF_THREAD_FRAME)) {
1401 if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
1402 ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr,
1405 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
1407 picture->pkt_dts = avpkt->dts;
1408 /* get_buffer is supposed to set frame parameters */
1409 if (!(avctx->codec->capabilities & CODEC_CAP_DR1)) {
1410 picture->sample_aspect_ratio = avctx->sample_aspect_ratio;
1411 picture->width = avctx->width;
1412 picture->height = avctx->height;
1413 picture->format = avctx->pix_fmt;
1417 emms_c(); //needed to avoid an emms_c() call before every return;
1419 if (ret < 0 && picture->buf[0])
1420 av_frame_unref(picture);
1422 if (*got_picture_ptr) {
1423 if (!avctx->refcounted_frames) {
1424 avci->to_free = *picture;
1425 avci->to_free.extended_data = avci->to_free.data;
1426 memset(picture->buf, 0, sizeof(picture->buf));
1429 avctx->frame_number++;
1437 int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
1442 AVCodecInternal *avci = avctx->internal;
1447 avctx->internal->pkt = avpkt;
1449 if (!avpkt->data && avpkt->size) {
1450 av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n");
1451 return AVERROR(EINVAL);
1454 ret = apply_param_change(avctx, avpkt);
1456 av_log(avctx, AV_LOG_ERROR, "Error applying parameter changes.\n");
1457 if (avctx->err_recognition & AV_EF_EXPLODE)
1461 avcodec_get_frame_defaults(frame);
1463 if (!avctx->refcounted_frames)
1464 av_frame_unref(&avci->to_free);
1466 if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size) {
1467 ret = avctx->codec->decode(avctx, frame, got_frame_ptr, avpkt);
1468 if (ret >= 0 && *got_frame_ptr) {
1469 avctx->frame_number++;
1470 frame->pkt_dts = avpkt->dts;
1471 if (frame->format == AV_SAMPLE_FMT_NONE)
1472 frame->format = avctx->sample_fmt;
1474 if (!avctx->refcounted_frames) {
1475 avci->to_free = *frame;
1476 avci->to_free.extended_data = avci->to_free.data;
1477 memset(frame->buf, 0, sizeof(frame->buf));
1478 frame->extended_buf = NULL;
1479 frame->nb_extended_buf = 0;
1481 } else if (frame->data[0])
1482 av_frame_unref(frame);
1489 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
1495 avctx->internal->pkt = avpkt;
1497 ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
1499 avctx->frame_number++;
1503 void avsubtitle_free(AVSubtitle *sub)
1507 for (i = 0; i < sub->num_rects; i++) {
1508 av_freep(&sub->rects[i]->pict.data[0]);
1509 av_freep(&sub->rects[i]->pict.data[1]);
1510 av_freep(&sub->rects[i]->pict.data[2]);
1511 av_freep(&sub->rects[i]->pict.data[3]);
1512 av_freep(&sub->rects[i]->text);
1513 av_freep(&sub->rects[i]->ass);
1514 av_freep(&sub->rects[i]);
1517 av_freep(&sub->rects);
1519 memset(sub, 0, sizeof(AVSubtitle));
1522 av_cold int avcodec_close(AVCodecContext *avctx)
1524 /* If there is a user-supplied mutex locking routine, call it. */
1526 if ((*lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
1530 entangled_thread_counter++;
1531 if (entangled_thread_counter != 1) {
1532 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
1533 entangled_thread_counter--;
1537 if (avcodec_is_open(avctx)) {
1538 FramePool *pool = avctx->internal->pool;
1540 if (HAVE_THREADS && avctx->internal->thread_ctx)
1541 ff_thread_free(avctx);
1542 if (avctx->codec && avctx->codec->close)
1543 avctx->codec->close(avctx);
1544 avctx->coded_frame = NULL;
1545 if (!avctx->refcounted_frames)
1546 av_frame_unref(&avctx->internal->to_free);
1547 for (i = 0; i < FF_ARRAY_ELEMS(pool->pools); i++)
1548 av_buffer_pool_uninit(&pool->pools[i]);
1549 av_freep(&avctx->internal->pool);
1550 av_freep(&avctx->internal);
1553 if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)
1554 av_opt_free(avctx->priv_data);
1556 av_freep(&avctx->priv_data);
1557 if (av_codec_is_encoder(avctx->codec))
1558 av_freep(&avctx->extradata);
1559 avctx->codec = NULL;
1560 avctx->active_thread_type = 0;
1561 entangled_thread_counter--;
1563 /* Release any user-supplied mutex. */
1565 (*lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
1570 static AVCodec *find_encdec(enum AVCodecID id, int encoder)
1572 AVCodec *p, *experimental = NULL;
1575 if ((encoder ? av_codec_is_encoder(p) : av_codec_is_decoder(p)) &&
1577 if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
1584 return experimental;
1587 AVCodec *avcodec_find_encoder(enum AVCodecID id)
1589 return find_encdec(id, 1);
1592 AVCodec *avcodec_find_encoder_by_name(const char *name)
1599 if (av_codec_is_encoder(p) && strcmp(name, p->name) == 0)
1606 AVCodec *avcodec_find_decoder(enum AVCodecID id)
1608 return find_encdec(id, 0);
1611 AVCodec *avcodec_find_decoder_by_name(const char *name)
1618 if (av_codec_is_decoder(p) && strcmp(name, p->name) == 0)
1625 static int get_bit_rate(AVCodecContext *ctx)
1628 int bits_per_sample;
1630 switch (ctx->codec_type) {
1631 case AVMEDIA_TYPE_VIDEO:
1632 case AVMEDIA_TYPE_DATA:
1633 case AVMEDIA_TYPE_SUBTITLE:
1634 case AVMEDIA_TYPE_ATTACHMENT:
1635 bit_rate = ctx->bit_rate;
1637 case AVMEDIA_TYPE_AUDIO:
1638 bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
1639 bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
1648 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
1650 int i, len, ret = 0;
1652 #define TAG_PRINT(x) \
1653 (((x) >= '0' && (x) <= '9') || \
1654 ((x) >= 'a' && (x) <= 'z') || ((x) >= 'A' && (x) <= 'Z') || \
1655 ((x) == '.' || (x) == ' '))
1657 for (i = 0; i < 4; i++) {
1658 len = snprintf(buf, buf_size,
1659 TAG_PRINT(codec_tag & 0xFF) ? "%c" : "[%d]", codec_tag & 0xFF);
1661 buf_size = buf_size > len ? buf_size - len : 0;
1668 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
1670 const char *codec_name;
1671 const char *profile = NULL;
1675 AVRational display_aspect_ratio;
1680 p = avcodec_find_encoder(enc->codec_id);
1682 p = avcodec_find_decoder(enc->codec_id);
1685 codec_name = p->name;
1686 profile = av_get_profile_name(p, enc->profile);
1687 } else if (enc->codec_id == AV_CODEC_ID_MPEG2TS) {
1688 /* fake mpeg2 transport stream codec (currently not
1690 codec_name = "mpeg2ts";
1691 } else if (enc->codec_name[0] != '\0') {
1692 codec_name = enc->codec_name;
1694 /* output avi tags */
1696 av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
1697 snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
1701 switch (enc->codec_type) {
1702 case AVMEDIA_TYPE_VIDEO:
1703 snprintf(buf, buf_size,
1705 codec_name, enc->mb_decision ? " (hq)" : "");
1707 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1709 if (enc->pix_fmt != AV_PIX_FMT_NONE) {
1710 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1712 av_get_pix_fmt_name(enc->pix_fmt));
1715 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1717 enc->width, enc->height);
1718 if (enc->sample_aspect_ratio.num) {
1719 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1720 enc->width * enc->sample_aspect_ratio.num,
1721 enc->height * enc->sample_aspect_ratio.den,
1723 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1724 " [PAR %d:%d DAR %d:%d]",
1725 enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
1726 display_aspect_ratio.num, display_aspect_ratio.den);
1728 if (av_log_get_level() >= AV_LOG_DEBUG) {
1729 int g = av_gcd(enc->time_base.num, enc->time_base.den);
1730 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1732 enc->time_base.num / g, enc->time_base.den / g);
1736 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1737 ", q=%d-%d", enc->qmin, enc->qmax);
1740 case AVMEDIA_TYPE_AUDIO:
1741 snprintf(buf, buf_size,
1745 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1747 if (enc->sample_rate) {
1748 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1749 ", %d Hz", enc->sample_rate);
1751 av_strlcat(buf, ", ", buf_size);
1752 av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
1753 if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {
1754 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1755 ", %s", av_get_sample_fmt_name(enc->sample_fmt));
1758 case AVMEDIA_TYPE_DATA:
1759 snprintf(buf, buf_size, "Data: %s", codec_name);
1761 case AVMEDIA_TYPE_SUBTITLE:
1762 snprintf(buf, buf_size, "Subtitle: %s", codec_name);
1764 case AVMEDIA_TYPE_ATTACHMENT:
1765 snprintf(buf, buf_size, "Attachment: %s", codec_name);
1768 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
1772 if (enc->flags & CODEC_FLAG_PASS1)
1773 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1775 if (enc->flags & CODEC_FLAG_PASS2)
1776 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1779 bitrate = get_bit_rate(enc);
1781 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1782 ", %d kb/s", bitrate / 1000);
1786 const char *av_get_profile_name(const AVCodec *codec, int profile)
1789 if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)
1792 for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
1793 if (p->profile == profile)
1799 unsigned avcodec_version(void)
1801 return LIBAVCODEC_VERSION_INT;
1804 const char *avcodec_configuration(void)
1806 return LIBAV_CONFIGURATION;
1809 const char *avcodec_license(void)
1811 #define LICENSE_PREFIX "libavcodec license: "
1812 return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
1815 void avcodec_flush_buffers(AVCodecContext *avctx)
1817 if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
1818 ff_thread_flush(avctx);
1819 else if (avctx->codec->flush)
1820 avctx->codec->flush(avctx);
1822 if (!avctx->refcounted_frames)
1823 av_frame_unref(&avctx->internal->to_free);
1826 int av_get_exact_bits_per_sample(enum AVCodecID codec_id)
1829 case AV_CODEC_ID_ADPCM_CT:
1830 case AV_CODEC_ID_ADPCM_IMA_APC:
1831 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
1832 case AV_CODEC_ID_ADPCM_IMA_WS:
1833 case AV_CODEC_ID_ADPCM_G722:
1834 case AV_CODEC_ID_ADPCM_YAMAHA:
1836 case AV_CODEC_ID_PCM_ALAW:
1837 case AV_CODEC_ID_PCM_MULAW:
1838 case AV_CODEC_ID_PCM_S8:
1839 case AV_CODEC_ID_PCM_U8:
1840 case AV_CODEC_ID_PCM_ZORK:
1842 case AV_CODEC_ID_PCM_S16BE:
1843 case AV_CODEC_ID_PCM_S16LE:
1844 case AV_CODEC_ID_PCM_S16LE_PLANAR:
1845 case AV_CODEC_ID_PCM_U16BE:
1846 case AV_CODEC_ID_PCM_U16LE:
1848 case AV_CODEC_ID_PCM_S24DAUD:
1849 case AV_CODEC_ID_PCM_S24BE:
1850 case AV_CODEC_ID_PCM_S24LE:
1851 case AV_CODEC_ID_PCM_S24LE_PLANAR:
1852 case AV_CODEC_ID_PCM_U24BE:
1853 case AV_CODEC_ID_PCM_U24LE:
1855 case AV_CODEC_ID_PCM_S32BE:
1856 case AV_CODEC_ID_PCM_S32LE:
1857 case AV_CODEC_ID_PCM_S32LE_PLANAR:
1858 case AV_CODEC_ID_PCM_U32BE:
1859 case AV_CODEC_ID_PCM_U32LE:
1860 case AV_CODEC_ID_PCM_F32BE:
1861 case AV_CODEC_ID_PCM_F32LE:
1863 case AV_CODEC_ID_PCM_F64BE:
1864 case AV_CODEC_ID_PCM_F64LE:
1871 int av_get_bits_per_sample(enum AVCodecID codec_id)
1874 case AV_CODEC_ID_ADPCM_SBPRO_2:
1876 case AV_CODEC_ID_ADPCM_SBPRO_3:
1878 case AV_CODEC_ID_ADPCM_SBPRO_4:
1879 case AV_CODEC_ID_ADPCM_IMA_WAV:
1880 case AV_CODEC_ID_ADPCM_IMA_QT:
1881 case AV_CODEC_ID_ADPCM_SWF:
1882 case AV_CODEC_ID_ADPCM_MS:
1885 return av_get_exact_bits_per_sample(codec_id);
1889 int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
1891 int id, sr, ch, ba, tag, bps;
1893 id = avctx->codec_id;
1894 sr = avctx->sample_rate;
1895 ch = avctx->channels;
1896 ba = avctx->block_align;
1897 tag = avctx->codec_tag;
1898 bps = av_get_exact_bits_per_sample(avctx->codec_id);
1900 /* codecs with an exact constant bits per sample */
1901 if (bps > 0 && ch > 0 && frame_bytes > 0)
1902 return (frame_bytes * 8) / (bps * ch);
1903 bps = avctx->bits_per_coded_sample;
1905 /* codecs with a fixed packet duration */
1907 case AV_CODEC_ID_ADPCM_ADX: return 32;
1908 case AV_CODEC_ID_ADPCM_IMA_QT: return 64;
1909 case AV_CODEC_ID_ADPCM_EA_XAS: return 128;
1910 case AV_CODEC_ID_AMR_NB:
1911 case AV_CODEC_ID_GSM:
1912 case AV_CODEC_ID_QCELP:
1913 case AV_CODEC_ID_RA_144:
1914 case AV_CODEC_ID_RA_288: return 160;
1915 case AV_CODEC_ID_IMC: return 256;
1916 case AV_CODEC_ID_AMR_WB:
1917 case AV_CODEC_ID_GSM_MS: return 320;
1918 case AV_CODEC_ID_MP1: return 384;
1919 case AV_CODEC_ID_ATRAC1: return 512;
1920 case AV_CODEC_ID_ATRAC3: return 1024;
1921 case AV_CODEC_ID_MP2:
1922 case AV_CODEC_ID_MUSEPACK7: return 1152;
1923 case AV_CODEC_ID_AC3: return 1536;
1927 /* calc from sample rate */
1928 if (id == AV_CODEC_ID_TTA)
1929 return 256 * sr / 245;
1932 /* calc from sample rate and channels */
1933 if (id == AV_CODEC_ID_BINKAUDIO_DCT)
1934 return (480 << (sr / 22050)) / ch;
1939 /* calc from block_align */
1940 if (id == AV_CODEC_ID_SIPR) {
1942 case 20: return 160;
1943 case 19: return 144;
1944 case 29: return 288;
1945 case 37: return 480;
1947 } else if (id == AV_CODEC_ID_ILBC) {
1949 case 38: return 160;
1950 case 50: return 240;
1955 if (frame_bytes > 0) {
1956 /* calc from frame_bytes only */
1957 if (id == AV_CODEC_ID_TRUESPEECH)
1958 return 240 * (frame_bytes / 32);
1959 if (id == AV_CODEC_ID_NELLYMOSER)
1960 return 256 * (frame_bytes / 64);
1963 /* calc from frame_bytes and bits_per_coded_sample */
1964 if (id == AV_CODEC_ID_ADPCM_G726)
1965 return frame_bytes * 8 / bps;
1969 /* calc from frame_bytes and channels */
1971 case AV_CODEC_ID_ADPCM_4XM:
1972 case AV_CODEC_ID_ADPCM_IMA_ISS:
1973 return (frame_bytes - 4 * ch) * 2 / ch;
1974 case AV_CODEC_ID_ADPCM_IMA_SMJPEG:
1975 return (frame_bytes - 4) * 2 / ch;
1976 case AV_CODEC_ID_ADPCM_IMA_AMV:
1977 return (frame_bytes - 8) * 2 / ch;
1978 case AV_CODEC_ID_ADPCM_XA:
1979 return (frame_bytes / 128) * 224 / ch;
1980 case AV_CODEC_ID_INTERPLAY_DPCM:
1981 return (frame_bytes - 6 - ch) / ch;
1982 case AV_CODEC_ID_ROQ_DPCM:
1983 return (frame_bytes - 8) / ch;
1984 case AV_CODEC_ID_XAN_DPCM:
1985 return (frame_bytes - 2 * ch) / ch;
1986 case AV_CODEC_ID_MACE3:
1987 return 3 * frame_bytes / ch;
1988 case AV_CODEC_ID_MACE6:
1989 return 6 * frame_bytes / ch;
1990 case AV_CODEC_ID_PCM_LXF:
1991 return 2 * (frame_bytes / (5 * ch));
1995 /* calc from frame_bytes, channels, and codec_tag */
1996 if (id == AV_CODEC_ID_SOL_DPCM) {
1998 return frame_bytes / ch;
2000 return frame_bytes * 2 / ch;
2005 /* calc from frame_bytes, channels, and block_align */
2006 int blocks = frame_bytes / ba;
2007 switch (avctx->codec_id) {
2008 case AV_CODEC_ID_ADPCM_IMA_WAV:
2009 return blocks * (1 + (ba - 4 * ch) / (4 * ch) * 8);
2010 case AV_CODEC_ID_ADPCM_IMA_DK3:
2011 return blocks * (((ba - 16) * 2 / 3 * 4) / ch);
2012 case AV_CODEC_ID_ADPCM_IMA_DK4:
2013 return blocks * (1 + (ba - 4 * ch) * 2 / ch);
2014 case AV_CODEC_ID_ADPCM_MS:
2015 return blocks * (2 + (ba - 7 * ch) * 2 / ch);
2020 /* calc from frame_bytes, channels, and bits_per_coded_sample */
2021 switch (avctx->codec_id) {
2022 case AV_CODEC_ID_PCM_DVD:
2023 return 2 * (frame_bytes / ((bps * 2 / 8) * ch));
2024 case AV_CODEC_ID_PCM_BLURAY:
2025 return frame_bytes / ((FFALIGN(ch, 2) * bps) / 8);
2026 case AV_CODEC_ID_S302M:
2027 return 2 * (frame_bytes / ((bps + 4) / 4)) / ch;
2037 int ff_thread_init(AVCodecContext *s)
2044 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
2058 int ff_match_2uint16(const uint16_t(*tab)[2], int size, int a, int b)
2061 for (i = 0; i < size && !(tab[i][0] == a && tab[i][1] == b); i++) ;
2065 #if FF_API_MISSING_SAMPLE
2066 FF_DISABLE_DEPRECATION_WARNINGS
2067 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
2069 av_log(avc, AV_LOG_WARNING, "%s is not implemented. Update your Libav "
2070 "version to the newest one from Git. If the problem still "
2071 "occurs, it means that your file has a feature which has not "
2072 "been implemented.\n", feature);
2074 av_log_ask_for_sample(avc, NULL);
2077 void av_log_ask_for_sample(void *avc, const char *msg, ...)
2079 va_list argument_list;
2081 va_start(argument_list, msg);
2084 av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
2085 av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
2086 "of this file to ftp://upload.libav.org/incoming/ "
2087 "and contact the libav-devel mailing list.\n");
2089 va_end(argument_list);
2091 FF_ENABLE_DEPRECATION_WARNINGS
2092 #endif /* FF_API_MISSING_SAMPLE */
2094 static AVHWAccel *first_hwaccel = NULL;
2096 void av_register_hwaccel(AVHWAccel *hwaccel)
2098 AVHWAccel **p = &first_hwaccel;
2102 hwaccel->next = NULL;
2105 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
2107 return hwaccel ? hwaccel->next : first_hwaccel;
2110 AVHWAccel *ff_find_hwaccel(AVCodecContext *avctx)
2112 enum AVCodecID codec_id = avctx->codec->id;
2113 enum AVPixelFormat pix_fmt = avctx->pix_fmt;
2115 AVHWAccel *hwaccel = NULL;
2117 while ((hwaccel = av_hwaccel_next(hwaccel)))
2118 if (hwaccel->id == codec_id
2119 && hwaccel->pix_fmt == pix_fmt)
2124 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
2127 if (lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
2129 if (lockmgr_cb(&avformat_mutex, AV_LOCK_DESTROY))
2136 if (lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
2138 if (lockmgr_cb(&avformat_mutex, AV_LOCK_CREATE))
2144 int avpriv_lock_avformat(void)
2147 if ((*lockmgr_cb)(&avformat_mutex, AV_LOCK_OBTAIN))
2153 int avpriv_unlock_avformat(void)
2156 if ((*lockmgr_cb)(&avformat_mutex, AV_LOCK_RELEASE))
2162 unsigned int avpriv_toupper4(unsigned int x)
2164 return av_toupper(x & 0xFF) +
2165 (av_toupper((x >> 8) & 0xFF) << 8) +
2166 (av_toupper((x >> 16) & 0xFF) << 16) +
2167 (av_toupper((x >> 24) & 0xFF) << 24);
2170 int ff_thread_ref_frame(ThreadFrame *dst, ThreadFrame *src)
2174 dst->owner = src->owner;
2176 ret = av_frame_ref(dst->f, src->f);
2180 if (src->progress &&
2181 !(dst->progress = av_buffer_ref(src->progress))) {
2182 ff_thread_release_buffer(dst->owner, dst);
2183 return AVERROR(ENOMEM);
2191 int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
2194 return ff_get_buffer(avctx, f->f, flags);
2197 void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
2199 av_frame_unref(f->f);
2202 void ff_thread_finish_setup(AVCodecContext *avctx)
2206 void ff_thread_report_progress(ThreadFrame *f, int progress, int field)
2210 void ff_thread_await_progress(ThreadFrame *f, int progress, int field)
2216 enum AVMediaType avcodec_get_type(enum AVCodecID codec_id)
2218 if (codec_id <= AV_CODEC_ID_NONE)
2219 return AVMEDIA_TYPE_UNKNOWN;
2220 else if (codec_id < AV_CODEC_ID_FIRST_AUDIO)
2221 return AVMEDIA_TYPE_VIDEO;
2222 else if (codec_id < AV_CODEC_ID_FIRST_SUBTITLE)
2223 return AVMEDIA_TYPE_AUDIO;
2224 else if (codec_id < AV_CODEC_ID_FIRST_UNKNOWN)
2225 return AVMEDIA_TYPE_SUBTITLE;
2227 return AVMEDIA_TYPE_UNKNOWN;
2230 int avcodec_is_open(AVCodecContext *s)
2232 return !!s->internal;
2235 const uint8_t *avpriv_find_start_code(const uint8_t *restrict p,
2237 uint32_t * restrict state)
2245 for (i = 0; i < 3; i++) {
2246 uint32_t tmp = *state << 8;
2247 *state = tmp + *(p++);
2248 if (tmp == 0x100 || p == end)
2253 if (p[-1] > 1 ) p += 3;
2254 else if (p[-2] ) p += 2;
2255 else if (p[-3]|(p[-1]-1)) p++;
2262 p = FFMIN(p, end) - 4;
2263 *state = AV_RB32(p);