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/mathematics.h"
36 #include "libavutil/pixdesc.h"
37 #include "libavutil/imgutils.h"
38 #include "libavutil/samplefmt.h"
39 #include "libavutil/dict.h"
42 #include "libavutil/opt.h"
45 #include "bytestream.h"
52 static int volatile entangled_thread_counter = 0;
53 static int (*lockmgr_cb)(void **mutex, enum AVLockOp op);
54 static void *codec_mutex;
55 static void *avformat_mutex;
57 void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
62 min_size = FFMAX(17 * min_size / 16 + 32, min_size);
64 ptr = av_realloc(ptr, min_size);
65 /* we could set this to the unmodified min_size but this is safer
66 * if the user lost the ptr and uses NULL now
76 void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
81 min_size = FFMAX(17 * min_size / 16 + 32, min_size);
83 *p = av_malloc(min_size);
89 void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
92 if (min_size > SIZE_MAX - FF_INPUT_BUFFER_PADDING_SIZE) {
97 av_fast_malloc(p, size, min_size + FF_INPUT_BUFFER_PADDING_SIZE);
99 memset((uint8_t *)*p + min_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
102 /* encoder management */
103 static AVCodec *first_avcodec = NULL;
105 AVCodec *av_codec_next(const AVCodec *c)
110 return first_avcodec;
113 static av_cold void avcodec_init(void)
115 static int initialized = 0;
117 if (initialized != 0)
122 ff_dsputil_static_init();
125 int av_codec_is_encoder(const AVCodec *codec)
127 return codec && (codec->encode_sub || codec->encode2);
130 int av_codec_is_decoder(const AVCodec *codec)
132 return codec && codec->decode;
135 av_cold void avcodec_register(AVCodec *codec)
145 if (codec->init_static_data)
146 codec->init_static_data(codec);
149 unsigned avcodec_get_edge_width(void)
154 void avcodec_set_dimensions(AVCodecContext *s, int width, int height)
156 s->coded_width = width;
157 s->coded_height = height;
162 #if (ARCH_ARM && HAVE_NEON) || ARCH_PPC || HAVE_MMX
163 # define STRIDE_ALIGN 16
165 # define STRIDE_ALIGN 8
168 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
169 int linesize_align[AV_NUM_DATA_POINTERS])
175 switch (s->pix_fmt) {
176 case AV_PIX_FMT_YUV420P:
177 case AV_PIX_FMT_YUYV422:
178 case AV_PIX_FMT_UYVY422:
179 case AV_PIX_FMT_YUV422P:
180 case AV_PIX_FMT_YUV440P:
181 case AV_PIX_FMT_YUV444P:
182 case AV_PIX_FMT_GBRP:
183 case AV_PIX_FMT_GRAY8:
184 case AV_PIX_FMT_GRAY16BE:
185 case AV_PIX_FMT_GRAY16LE:
186 case AV_PIX_FMT_YUVJ420P:
187 case AV_PIX_FMT_YUVJ422P:
188 case AV_PIX_FMT_YUVJ440P:
189 case AV_PIX_FMT_YUVJ444P:
190 case AV_PIX_FMT_YUVA420P:
191 case AV_PIX_FMT_YUVA422P:
192 case AV_PIX_FMT_YUVA444P:
193 case AV_PIX_FMT_YUV420P9LE:
194 case AV_PIX_FMT_YUV420P9BE:
195 case AV_PIX_FMT_YUV420P10LE:
196 case AV_PIX_FMT_YUV420P10BE:
197 case AV_PIX_FMT_YUV422P9LE:
198 case AV_PIX_FMT_YUV422P9BE:
199 case AV_PIX_FMT_YUV422P10LE:
200 case AV_PIX_FMT_YUV422P10BE:
201 case AV_PIX_FMT_YUV444P9LE:
202 case AV_PIX_FMT_YUV444P9BE:
203 case AV_PIX_FMT_YUV444P10LE:
204 case AV_PIX_FMT_YUV444P10BE:
205 case AV_PIX_FMT_GBRP9LE:
206 case AV_PIX_FMT_GBRP9BE:
207 case AV_PIX_FMT_GBRP10LE:
208 case AV_PIX_FMT_GBRP10BE:
209 w_align = 16; //FIXME assume 16 pixel per macroblock
210 h_align = 16 * 2; // interlaced needs 2 macroblocks height
212 case AV_PIX_FMT_YUV411P:
213 case AV_PIX_FMT_UYYVYY411:
217 case AV_PIX_FMT_YUV410P:
218 if (s->codec_id == AV_CODEC_ID_SVQ1) {
222 case AV_PIX_FMT_RGB555:
223 if (s->codec_id == AV_CODEC_ID_RPZA) {
227 case AV_PIX_FMT_PAL8:
228 case AV_PIX_FMT_BGR8:
229 case AV_PIX_FMT_RGB8:
230 if (s->codec_id == AV_CODEC_ID_SMC) {
235 case AV_PIX_FMT_BGR24:
236 if ((s->codec_id == AV_CODEC_ID_MSZH) ||
237 (s->codec_id == AV_CODEC_ID_ZLIB)) {
248 *width = FFALIGN(*width, w_align);
249 *height = FFALIGN(*height, h_align);
250 if (s->codec_id == AV_CODEC_ID_H264)
251 // some of the optimized chroma MC reads one line too much
254 for (i = 0; i < 4; i++)
255 linesize_align[i] = STRIDE_ALIGN;
258 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height)
260 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(s->pix_fmt);
261 int chroma_shift = desc->log2_chroma_w;
262 int linesize_align[AV_NUM_DATA_POINTERS];
265 avcodec_align_dimensions2(s, width, height, linesize_align);
266 align = FFMAX(linesize_align[0], linesize_align[3]);
267 linesize_align[1] <<= chroma_shift;
268 linesize_align[2] <<= chroma_shift;
269 align = FFMAX3(align, linesize_align[1], linesize_align[2]);
270 *width = FFALIGN(*width, align);
273 int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
274 enum AVSampleFormat sample_fmt, const uint8_t *buf,
275 int buf_size, int align)
277 int ch, planar, needed_size, ret = 0;
279 needed_size = av_samples_get_buffer_size(NULL, nb_channels,
280 frame->nb_samples, sample_fmt,
282 if (buf_size < needed_size)
283 return AVERROR(EINVAL);
285 planar = av_sample_fmt_is_planar(sample_fmt);
286 if (planar && nb_channels > AV_NUM_DATA_POINTERS) {
287 if (!(frame->extended_data = av_mallocz(nb_channels *
288 sizeof(*frame->extended_data))))
289 return AVERROR(ENOMEM);
291 frame->extended_data = frame->data;
294 if ((ret = av_samples_fill_arrays(frame->extended_data, &frame->linesize[0],
295 buf, nb_channels, frame->nb_samples,
296 sample_fmt, align)) < 0) {
297 if (frame->extended_data != frame->data)
298 av_free(frame->extended_data);
301 if (frame->extended_data != frame->data) {
302 for (ch = 0; ch < AV_NUM_DATA_POINTERS; ch++)
303 frame->data[ch] = frame->extended_data[ch];
309 static int update_frame_pool(AVCodecContext *avctx, AVFrame *frame)
311 FramePool *pool = avctx->internal->pool;
314 switch (avctx->codec_type) {
315 case AVMEDIA_TYPE_VIDEO: {
318 int w = frame->width;
319 int h = frame->height;
320 int tmpsize, unaligned;
322 if (pool->format == frame->format &&
323 pool->width == frame->width && pool->height == frame->height)
326 avcodec_align_dimensions2(avctx, &w, &h, pool->stride_align);
328 if (!(avctx->flags & CODEC_FLAG_EMU_EDGE)) {
334 // NOTE: do not align linesizes individually, this breaks e.g. assumptions
335 // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
336 av_image_fill_linesizes(picture.linesize, avctx->pix_fmt, w);
337 // increase alignment of w for next try (rhs gives the lowest bit set in w)
341 for (i = 0; i < 4; i++)
342 unaligned |= picture.linesize[i] % pool->stride_align[i];
345 tmpsize = av_image_fill_pointers(picture.data, avctx->pix_fmt, h,
346 NULL, picture.linesize);
350 for (i = 0; i < 3 && picture.data[i + 1]; i++)
351 size[i] = picture.data[i + 1] - picture.data[i];
352 size[i] = tmpsize - (picture.data[i] - picture.data[0]);
354 for (i = 0; i < 4; i++) {
355 av_buffer_pool_uninit(&pool->pools[i]);
356 pool->linesize[i] = picture.linesize[i];
358 pool->pools[i] = av_buffer_pool_init(size[i] + 16, NULL);
359 if (!pool->pools[i]) {
360 ret = AVERROR(ENOMEM);
365 pool->format = frame->format;
366 pool->width = frame->width;
367 pool->height = frame->height;
371 case AVMEDIA_TYPE_AUDIO: {
372 int ch = av_get_channel_layout_nb_channels(frame->channel_layout);
373 int planar = av_sample_fmt_is_planar(frame->format);
374 int planes = planar ? ch : 1;
376 if (pool->format == frame->format && pool->planes == planes &&
377 pool->channels == ch && frame->nb_samples == pool->samples)
380 av_buffer_pool_uninit(&pool->pools[0]);
381 ret = av_samples_get_buffer_size(&pool->linesize[0], ch,
382 frame->nb_samples, frame->format, 0);
386 pool->pools[0] = av_buffer_pool_init(pool->linesize[0], NULL);
387 if (!pool->pools[0]) {
388 ret = AVERROR(ENOMEM);
392 pool->format = frame->format;
393 pool->planes = planes;
395 pool->samples = frame->nb_samples;
398 default: av_assert0(0);
402 for (i = 0; i < 4; i++)
403 av_buffer_pool_uninit(&pool->pools[i]);
405 pool->planes = pool->channels = pool->samples = 0;
406 pool->width = pool->height = 0;
410 static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
412 FramePool *pool = avctx->internal->pool;
413 int planes = pool->planes;
416 frame->linesize[0] = pool->linesize[0];
418 if (planes > AV_NUM_DATA_POINTERS) {
419 frame->extended_data = av_mallocz(planes * sizeof(*frame->extended_data));
420 frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS;
421 frame->extended_buf = av_mallocz(frame->nb_extended_buf *
422 sizeof(*frame->extended_buf));
423 if (!frame->extended_data || !frame->extended_buf) {
424 av_freep(&frame->extended_data);
425 av_freep(&frame->extended_buf);
426 return AVERROR(ENOMEM);
429 frame->extended_data = frame->data;
431 for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) {
432 frame->buf[i] = av_buffer_pool_get(pool->pools[0]);
435 frame->extended_data[i] = frame->data[i] = frame->buf[i]->data;
437 for (i = 0; i < frame->nb_extended_buf; i++) {
438 frame->extended_buf[i] = av_buffer_pool_get(pool->pools[0]);
439 if (!frame->extended_buf[i])
441 frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data;
444 if (avctx->debug & FF_DEBUG_BUFFERS)
445 av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p", frame);
449 av_frame_unref(frame);
450 return AVERROR(ENOMEM);
453 static int video_get_buffer(AVCodecContext *s, AVFrame *pic)
455 FramePool *pool = s->internal->pool;
456 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pic->format);
457 int pixel_size = desc->comp[0].step_minus1 + 1;
458 int h_chroma_shift, v_chroma_shift;
461 if (pic->data[0] != NULL) {
462 av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
466 memset(pic->data, 0, sizeof(pic->data));
467 pic->extended_data = pic->data;
469 av_pix_fmt_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
471 for (i = 0; i < 4 && pool->pools[i]; i++) {
472 const int h_shift = i == 0 ? 0 : h_chroma_shift;
473 const int v_shift = i == 0 ? 0 : v_chroma_shift;
475 pic->linesize[i] = pool->linesize[i];
477 pic->buf[i] = av_buffer_pool_get(pool->pools[i]);
481 // no edge if EDGE EMU or not planar YUV
482 if ((s->flags & CODEC_FLAG_EMU_EDGE) || !pool->pools[2])
483 pic->data[i] = pic->buf[i]->data;
485 pic->data[i] = pic->buf[i]->data +
486 FFALIGN((pic->linesize[i] * EDGE_WIDTH >> v_shift) +
487 (pixel_size * EDGE_WIDTH >> h_shift), pool->stride_align[i]);
490 for (; i < AV_NUM_DATA_POINTERS; i++) {
492 pic->linesize[i] = 0;
494 if (pic->data[1] && !pic->data[2])
495 avpriv_set_systematic_pal2((uint32_t *)pic->data[1], s->pix_fmt);
497 if (s->debug & FF_DEBUG_BUFFERS)
498 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p\n", pic);
503 return AVERROR(ENOMEM);
506 int avcodec_default_get_buffer2(AVCodecContext *avctx, AVFrame *frame, int flags)
510 if ((ret = update_frame_pool(avctx, frame)) < 0)
513 #if FF_API_GET_BUFFER
514 frame->type = FF_BUFFER_TYPE_INTERNAL;
517 switch (avctx->codec_type) {
518 case AVMEDIA_TYPE_VIDEO:
519 return video_get_buffer(avctx, frame);
520 case AVMEDIA_TYPE_AUDIO:
521 return audio_get_buffer(avctx, frame);
527 #if FF_API_GET_BUFFER
528 int avcodec_default_get_buffer(AVCodecContext *avctx, AVFrame *frame)
530 return avcodec_default_get_buffer2(avctx, frame, 0);
533 typedef struct CompatReleaseBufPriv {
534 AVCodecContext avctx;
536 } CompatReleaseBufPriv;
538 static void compat_free_buffer(void *opaque, uint8_t *data)
540 CompatReleaseBufPriv *priv = opaque;
541 if (priv->avctx.release_buffer)
542 priv->avctx.release_buffer(&priv->avctx, &priv->frame);
546 static void compat_release_buffer(void *opaque, uint8_t *data)
548 AVBufferRef *buf = opaque;
549 av_buffer_unref(&buf);
553 int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
557 switch (avctx->codec_type) {
558 case AVMEDIA_TYPE_VIDEO:
559 frame->width = FFMAX(avctx->width, avctx->coded_width);
560 frame->height = FFMAX(avctx->height, avctx->coded_height);
561 if (frame->format < 0)
562 frame->format = avctx->pix_fmt;
563 if (!frame->sample_aspect_ratio.num)
564 frame->sample_aspect_ratio = avctx->sample_aspect_ratio;
566 if ((ret = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
569 case AVMEDIA_TYPE_AUDIO:
570 if (!frame->sample_rate)
571 frame->sample_rate = avctx->sample_rate;
572 if (frame->format < 0)
573 frame->format = avctx->sample_fmt;
574 if (!frame->channel_layout) {
575 if (avctx->channel_layout) {
576 if (av_get_channel_layout_nb_channels(avctx->channel_layout) !=
578 av_log(avctx, AV_LOG_ERROR, "Inconsistent channel "
580 return AVERROR(EINVAL);
583 frame->channel_layout = avctx->channel_layout;
585 if (avctx->channels > FF_SANE_NB_CHANNELS) {
586 av_log(avctx, AV_LOG_ERROR, "Too many channels: %d.\n",
588 return AVERROR(ENOSYS);
591 frame->channel_layout = av_get_default_channel_layout(avctx->channels);
592 if (!frame->channel_layout)
593 frame->channel_layout = (1ULL << avctx->channels) - 1;
597 default: return AVERROR(EINVAL);
600 frame->pkt_pts = avctx->pkt ? avctx->pkt->pts : AV_NOPTS_VALUE;
601 frame->reordered_opaque = avctx->reordered_opaque;
603 #if FF_API_GET_BUFFER
605 * Wrap an old get_buffer()-allocated buffer in an bunch of AVBuffers.
606 * We wrap each plane in its own AVBuffer. Each of those has a reference to
607 * a dummy AVBuffer as its private data, unreffing it on free.
608 * When all the planes are freed, the dummy buffer's free callback calls
611 if (avctx->get_buffer) {
612 CompatReleaseBufPriv *priv = NULL;
613 AVBufferRef *dummy_buf = NULL;
616 if (flags & AV_GET_BUFFER_FLAG_REF)
617 frame->reference = 1;
619 ret = avctx->get_buffer(avctx, frame);
623 /* return if the buffers are already set up
624 * this would happen e.g. when a custom get_buffer() calls
625 * avcodec_default_get_buffer
630 priv = av_mallocz(sizeof(*priv));
632 ret = AVERROR(ENOMEM);
635 priv->avctx = *avctx;
636 priv->frame = *frame;
638 dummy_buf = av_buffer_create(NULL, 0, compat_free_buffer, priv, 0);
640 ret = AVERROR(ENOMEM);
644 #define WRAP_PLANE(ref_out, data, data_size) \
646 AVBufferRef *dummy_ref = av_buffer_ref(dummy_buf); \
648 ret = AVERROR(ENOMEM); \
651 ref_out = av_buffer_create(data, data_size, compat_release_buffer, \
654 av_frame_unref(frame); \
655 ret = AVERROR(ENOMEM); \
660 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
661 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
663 planes = av_pix_fmt_count_planes(frame->format);
664 /* workaround for AVHWAccel plane count of 0, buf[0] is used as
665 check for allocated buffers: make libavcodec happy */
666 if (desc && desc->flags & PIX_FMT_HWACCEL)
668 if (!desc || planes <= 0) {
669 ret = AVERROR(EINVAL);
673 for (i = 0; i < planes; i++) {
674 int v_shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
675 int plane_size = (frame->height >> v_shift) * frame->linesize[i];
677 WRAP_PLANE(frame->buf[i], frame->data[i], plane_size);
680 int planar = av_sample_fmt_is_planar(frame->format);
681 planes = planar ? avctx->channels : 1;
683 if (planes > FF_ARRAY_ELEMS(frame->buf)) {
684 frame->nb_extended_buf = planes - FF_ARRAY_ELEMS(frame->buf);
685 frame->extended_buf = av_malloc(sizeof(*frame->extended_buf) *
686 frame->nb_extended_buf);
687 if (!frame->extended_buf) {
688 ret = AVERROR(ENOMEM);
693 for (i = 0; i < FFMIN(planes, FF_ARRAY_ELEMS(frame->buf)); i++)
694 WRAP_PLANE(frame->buf[i], frame->extended_data[i], frame->linesize[0]);
696 for (i = 0; i < frame->nb_extended_buf; i++)
697 WRAP_PLANE(frame->extended_buf[i],
698 frame->extended_data[i + FF_ARRAY_ELEMS(frame->buf)],
702 av_buffer_unref(&dummy_buf);
704 frame->width = avctx->width;
705 frame->height = avctx->height;
710 avctx->release_buffer(avctx, frame);
712 av_buffer_unref(&dummy_buf);
717 ret = avctx->get_buffer2(avctx, frame, flags);
719 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
720 frame->width = avctx->width;
721 frame->height = avctx->height;
727 int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame)
732 av_assert0(avctx->codec_type == AVMEDIA_TYPE_VIDEO);
735 return ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
737 if (av_frame_is_writable(frame))
740 av_frame_move_ref(&tmp, frame);
742 ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
744 av_frame_unref(&tmp);
748 av_image_copy(frame->data, frame->linesize, tmp.data, tmp.linesize,
749 frame->format, frame->width, frame->height);
751 av_frame_unref(&tmp);
756 #if FF_API_GET_BUFFER
757 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic)
762 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic)
768 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size)
772 for (i = 0; i < count; i++) {
773 int r = func(c, (char *)arg + i * size);
780 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr), void *arg, int *ret, int count)
784 for (i = 0; i < count; i++) {
785 int r = func(c, arg, i, 0);
792 static int is_hwaccel_pix_fmt(enum AVPixelFormat pix_fmt)
794 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
795 return desc->flags & PIX_FMT_HWACCEL;
798 enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
800 while (*fmt != AV_PIX_FMT_NONE && is_hwaccel_pix_fmt(*fmt))
805 void avcodec_get_frame_defaults(AVFrame *frame)
807 if (frame->extended_data != frame->data)
808 av_freep(&frame->extended_data);
810 memset(frame, 0, sizeof(AVFrame));
812 frame->pts = AV_NOPTS_VALUE;
813 frame->key_frame = 1;
814 frame->sample_aspect_ratio = (AVRational) {0, 1 };
815 frame->format = -1; /* unknown */
816 frame->extended_data = frame->data;
819 AVFrame *avcodec_alloc_frame(void)
821 AVFrame *frame = av_mallocz(sizeof(AVFrame));
826 avcodec_get_frame_defaults(frame);
831 void avcodec_free_frame(AVFrame **frame)
835 if (!frame || !*frame)
840 if (f->extended_data != f->data)
841 av_freep(&f->extended_data);
846 int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
849 AVDictionary *tmp = NULL;
851 if (avcodec_is_open(avctx))
854 if ((!codec && !avctx->codec)) {
855 av_log(avctx, AV_LOG_ERROR, "No codec provided to avcodec_open2().\n");
856 return AVERROR(EINVAL);
858 if ((codec && avctx->codec && codec != avctx->codec)) {
859 av_log(avctx, AV_LOG_ERROR, "This AVCodecContext was allocated for %s, "
860 "but %s passed to avcodec_open2().\n", avctx->codec->name, codec->name);
861 return AVERROR(EINVAL);
864 codec = avctx->codec;
866 if (avctx->extradata_size < 0 || avctx->extradata_size >= FF_MAX_EXTRADATA_SIZE)
867 return AVERROR(EINVAL);
870 av_dict_copy(&tmp, *options, 0);
872 /* If there is a user-supplied mutex locking routine, call it. */
874 if ((*lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
878 entangled_thread_counter++;
879 if (entangled_thread_counter != 1) {
880 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
885 avctx->internal = av_mallocz(sizeof(AVCodecInternal));
886 if (!avctx->internal) {
887 ret = AVERROR(ENOMEM);
891 avctx->internal->pool = av_mallocz(sizeof(*avctx->internal->pool));
892 if (!avctx->internal->pool) {
893 ret = AVERROR(ENOMEM);
897 if (codec->priv_data_size > 0) {
898 if (!avctx->priv_data) {
899 avctx->priv_data = av_mallocz(codec->priv_data_size);
900 if (!avctx->priv_data) {
901 ret = AVERROR(ENOMEM);
904 if (codec->priv_class) {
905 *(const AVClass **)avctx->priv_data = codec->priv_class;
906 av_opt_set_defaults(avctx->priv_data);
909 if (codec->priv_class && (ret = av_opt_set_dict(avctx->priv_data, &tmp)) < 0)
912 avctx->priv_data = NULL;
914 if ((ret = av_opt_set_dict(avctx, &tmp)) < 0)
917 if (avctx->coded_width && avctx->coded_height && !avctx->width && !avctx->height)
918 avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
919 else if (avctx->width && avctx->height)
920 avcodec_set_dimensions(avctx, avctx->width, avctx->height);
922 if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
923 && ( av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0
924 || av_image_check_size(avctx->width, avctx->height, 0, avctx) < 0)) {
925 av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n");
926 avcodec_set_dimensions(avctx, 0, 0);
929 /* if the decoder init function was already called previously,
930 * free the already allocated subtitle_header before overwriting it */
931 if (av_codec_is_decoder(codec))
932 av_freep(&avctx->subtitle_header);
934 if (avctx->channels > FF_SANE_NB_CHANNELS) {
935 ret = AVERROR(EINVAL);
939 avctx->codec = codec;
940 if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
941 avctx->codec_id == AV_CODEC_ID_NONE) {
942 avctx->codec_type = codec->type;
943 avctx->codec_id = codec->id;
945 if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type
946 && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
947 av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
948 ret = AVERROR(EINVAL);
951 avctx->frame_number = 0;
953 if (avctx->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
954 avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
955 ret = AVERROR_EXPERIMENTAL;
959 if (avctx->codec_type == AVMEDIA_TYPE_AUDIO &&
960 (!avctx->time_base.num || !avctx->time_base.den)) {
961 avctx->time_base.num = 1;
962 avctx->time_base.den = avctx->sample_rate;
965 if (HAVE_THREADS && !avctx->thread_opaque) {
966 ret = ff_thread_init(avctx);
971 if (!HAVE_THREADS && !(codec->capabilities & CODEC_CAP_AUTO_THREADS))
972 avctx->thread_count = 1;
974 if (av_codec_is_encoder(avctx->codec)) {
976 if (avctx->codec->sample_fmts) {
977 for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++) {
978 if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
980 if (avctx->channels == 1 &&
981 av_get_planar_sample_fmt(avctx->sample_fmt) ==
982 av_get_planar_sample_fmt(avctx->codec->sample_fmts[i])) {
983 avctx->sample_fmt = avctx->codec->sample_fmts[i];
987 if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
988 av_log(avctx, AV_LOG_ERROR, "Specified sample_fmt is not supported.\n");
989 ret = AVERROR(EINVAL);
993 if (avctx->codec->pix_fmts) {
994 for (i = 0; avctx->codec->pix_fmts[i] != AV_PIX_FMT_NONE; i++)
995 if (avctx->pix_fmt == avctx->codec->pix_fmts[i])
997 if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_NONE) {
998 av_log(avctx, AV_LOG_ERROR, "Specified pix_fmt is not supported\n");
999 ret = AVERROR(EINVAL);
1003 if (avctx->codec->supported_samplerates) {
1004 for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)
1005 if (avctx->sample_rate == avctx->codec->supported_samplerates[i])
1007 if (avctx->codec->supported_samplerates[i] == 0) {
1008 av_log(avctx, AV_LOG_ERROR, "Specified sample_rate is not supported\n");
1009 ret = AVERROR(EINVAL);
1013 if (avctx->codec->channel_layouts) {
1014 if (!avctx->channel_layout) {
1015 av_log(avctx, AV_LOG_WARNING, "channel_layout not specified\n");
1017 for (i = 0; avctx->codec->channel_layouts[i] != 0; i++)
1018 if (avctx->channel_layout == avctx->codec->channel_layouts[i])
1020 if (avctx->codec->channel_layouts[i] == 0) {
1021 av_log(avctx, AV_LOG_ERROR, "Specified channel_layout is not supported\n");
1022 ret = AVERROR(EINVAL);
1027 if (avctx->channel_layout && avctx->channels) {
1028 if (av_get_channel_layout_nb_channels(avctx->channel_layout) != avctx->channels) {
1029 av_log(avctx, AV_LOG_ERROR, "channel layout does not match number of channels\n");
1030 ret = AVERROR(EINVAL);
1033 } else if (avctx->channel_layout) {
1034 avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
1037 if (!avctx->rc_initial_buffer_occupancy)
1038 avctx->rc_initial_buffer_occupancy = avctx->rc_buffer_size * 3 / 4;
1041 if (avctx->codec->init && !(avctx->active_thread_type & FF_THREAD_FRAME)) {
1042 ret = avctx->codec->init(avctx);
1048 if (av_codec_is_decoder(avctx->codec)) {
1049 /* validate channel layout from the decoder */
1050 if (avctx->channel_layout) {
1051 int channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
1052 if (!avctx->channels)
1053 avctx->channels = channels;
1054 else if (channels != avctx->channels) {
1055 av_log(avctx, AV_LOG_WARNING,
1056 "channel layout does not match number of channels\n");
1057 avctx->channel_layout = 0;
1060 if (avctx->channels && avctx->channels < 0 ||
1061 avctx->channels > FF_SANE_NB_CHANNELS) {
1062 ret = AVERROR(EINVAL);
1067 entangled_thread_counter--;
1069 /* Release any user-supplied mutex. */
1071 (*lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
1074 av_dict_free(options);
1081 av_freep(&avctx->priv_data);
1082 if (avctx->internal)
1083 av_freep(&avctx->internal->pool);
1084 av_freep(&avctx->internal);
1085 avctx->codec = NULL;
1089 int ff_alloc_packet(AVPacket *avpkt, int size)
1091 if (size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE)
1092 return AVERROR(EINVAL);
1095 AVBufferRef *buf = avpkt->buf;
1096 #if FF_API_DESTRUCT_PACKET
1097 void *destruct = avpkt->destruct;
1100 if (avpkt->size < size)
1101 return AVERROR(EINVAL);
1103 av_init_packet(avpkt);
1104 #if FF_API_DESTRUCT_PACKET
1105 avpkt->destruct = destruct;
1111 return av_new_packet(avpkt, size);
1116 * Pad last frame with silence.
1118 static int pad_last_frame(AVCodecContext *s, AVFrame **dst, const AVFrame *src)
1120 AVFrame *frame = NULL;
1121 uint8_t *buf = NULL;
1124 if (!(frame = avcodec_alloc_frame()))
1125 return AVERROR(ENOMEM);
1128 if ((ret = av_samples_get_buffer_size(&frame->linesize[0], s->channels,
1129 s->frame_size, s->sample_fmt, 0)) < 0)
1132 if (!(buf = av_malloc(ret))) {
1133 ret = AVERROR(ENOMEM);
1137 frame->nb_samples = s->frame_size;
1138 if ((ret = avcodec_fill_audio_frame(frame, s->channels, s->sample_fmt,
1141 if ((ret = av_samples_copy(frame->extended_data, src->extended_data, 0, 0,
1142 src->nb_samples, s->channels, s->sample_fmt)) < 0)
1144 if ((ret = av_samples_set_silence(frame->extended_data, src->nb_samples,
1145 frame->nb_samples - src->nb_samples,
1146 s->channels, s->sample_fmt)) < 0)
1154 if (frame->extended_data != frame->data)
1155 av_freep(&frame->extended_data);
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;
1255 av_freep(&padded_frame->data[0]);
1256 if (padded_frame->extended_data != padded_frame->data)
1257 av_freep(&padded_frame->extended_data);
1258 av_freep(&padded_frame);
1264 int attribute_align_arg avcodec_encode_video2(AVCodecContext *avctx,
1266 const AVFrame *frame,
1267 int *got_packet_ptr)
1270 int user_packet = !!avpkt->data;
1272 *got_packet_ptr = 0;
1274 if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) {
1275 av_free_packet(avpkt);
1276 av_init_packet(avpkt);
1281 if (av_image_check_size(avctx->width, avctx->height, 0, avctx))
1282 return AVERROR(EINVAL);
1284 av_assert0(avctx->codec->encode2);
1286 ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
1288 if (!*got_packet_ptr)
1290 else if (!(avctx->codec->capabilities & CODEC_CAP_DELAY))
1291 avpkt->pts = avpkt->dts = frame->pts;
1293 if (!user_packet && avpkt->size) {
1294 ret = av_buffer_realloc(&avpkt->buf, avpkt->size);
1296 avpkt->data = avpkt->buf->data;
1299 avctx->frame_number++;
1302 if (ret < 0 || !*got_packet_ptr)
1303 av_free_packet(avpkt);
1309 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1310 const AVSubtitle *sub)
1313 if (sub->start_display_time) {
1314 av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
1317 if (sub->num_rects == 0 || !sub->rects)
1319 ret = avctx->codec->encode_sub(avctx, buf, buf_size, sub);
1320 avctx->frame_number++;
1324 static void apply_param_change(AVCodecContext *avctx, AVPacket *avpkt)
1327 const uint8_t *data;
1330 if (!(avctx->codec->capabilities & CODEC_CAP_PARAM_CHANGE))
1333 data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size);
1334 if (!data || size < 4)
1336 flags = bytestream_get_le32(&data);
1338 if (size < 4) /* Required for any of the changes */
1340 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) {
1341 avctx->channels = bytestream_get_le32(&data);
1344 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) {
1347 avctx->channel_layout = bytestream_get_le64(&data);
1352 if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) {
1353 avctx->sample_rate = bytestream_get_le32(&data);
1356 if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) {
1359 avctx->width = bytestream_get_le32(&data);
1360 avctx->height = bytestream_get_le32(&data);
1361 avcodec_set_dimensions(avctx, avctx->width, avctx->height);
1366 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
1367 int *got_picture_ptr,
1370 AVCodecInternal *avci = avctx->internal;
1373 *got_picture_ptr = 0;
1374 if ((avctx->coded_width || avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
1378 apply_param_change(avctx, avpkt);
1380 avcodec_get_frame_defaults(picture);
1382 if (!avctx->refcounted_frames)
1383 av_frame_unref(&avci->to_free);
1385 if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type & FF_THREAD_FRAME)) {
1386 if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
1387 ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr,
1390 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
1392 picture->pkt_dts = avpkt->dts;
1393 /* get_buffer is supposed to set frame parameters */
1394 if (!(avctx->codec->capabilities & CODEC_CAP_DR1)) {
1395 picture->sample_aspect_ratio = avctx->sample_aspect_ratio;
1396 picture->width = avctx->width;
1397 picture->height = avctx->height;
1398 picture->format = avctx->pix_fmt;
1402 emms_c(); //needed to avoid an emms_c() call before every return;
1404 if (ret < 0 && picture->data[0])
1405 av_frame_unref(picture);
1407 if (*got_picture_ptr) {
1408 if (!avctx->refcounted_frames) {
1409 avci->to_free = *picture;
1410 avci->to_free.extended_data = avci->to_free.data;
1411 memset(picture->buf, 0, sizeof(picture->buf));
1414 avctx->frame_number++;
1419 /* many decoders assign whole AVFrames, thus overwriting extended_data;
1420 * make sure it's set correctly */
1421 picture->extended_data = picture->data;
1426 int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
1431 AVCodecInternal *avci = avctx->internal;
1432 int planar, channels;
1439 if (!avpkt->data && avpkt->size) {
1440 av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n");
1441 return AVERROR(EINVAL);
1444 apply_param_change(avctx, avpkt);
1446 avcodec_get_frame_defaults(frame);
1448 if (!avctx->refcounted_frames)
1449 av_frame_unref(&avci->to_free);
1451 if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size) {
1452 ret = avctx->codec->decode(avctx, frame, got_frame_ptr, avpkt);
1453 if (ret >= 0 && *got_frame_ptr) {
1454 avctx->frame_number++;
1455 frame->pkt_dts = avpkt->dts;
1456 if (frame->format == AV_SAMPLE_FMT_NONE)
1457 frame->format = avctx->sample_fmt;
1459 if (!avctx->refcounted_frames) {
1460 avci->to_free = *frame;
1461 avci->to_free.extended_data = avci->to_free.data;
1462 memset(frame->buf, 0, sizeof(frame->buf));
1463 frame->extended_buf = NULL;
1464 frame->nb_extended_buf = 0;
1466 } else if (frame->data[0])
1467 av_frame_unref(frame);
1470 /* many decoders assign whole AVFrames, thus overwriting extended_data;
1471 * make sure it's set correctly; assume decoders that actually use
1472 * extended_data are doing it correctly */
1473 planar = av_sample_fmt_is_planar(frame->format);
1474 channels = av_get_channel_layout_nb_channels(frame->channel_layout);
1475 if (!(planar && channels > AV_NUM_DATA_POINTERS))
1476 frame->extended_data = frame->data;
1481 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
1489 ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
1491 avctx->frame_number++;
1495 void avsubtitle_free(AVSubtitle *sub)
1499 for (i = 0; i < sub->num_rects; i++) {
1500 av_freep(&sub->rects[i]->pict.data[0]);
1501 av_freep(&sub->rects[i]->pict.data[1]);
1502 av_freep(&sub->rects[i]->pict.data[2]);
1503 av_freep(&sub->rects[i]->pict.data[3]);
1504 av_freep(&sub->rects[i]->text);
1505 av_freep(&sub->rects[i]->ass);
1506 av_freep(&sub->rects[i]);
1509 av_freep(&sub->rects);
1511 memset(sub, 0, sizeof(AVSubtitle));
1514 av_cold int avcodec_close(AVCodecContext *avctx)
1516 /* If there is a user-supplied mutex locking routine, call it. */
1518 if ((*lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
1522 entangled_thread_counter++;
1523 if (entangled_thread_counter != 1) {
1524 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
1525 entangled_thread_counter--;
1529 if (avcodec_is_open(avctx)) {
1530 FramePool *pool = avctx->internal->pool;
1532 if (HAVE_THREADS && avctx->thread_opaque)
1533 ff_thread_free(avctx);
1534 if (avctx->codec && avctx->codec->close)
1535 avctx->codec->close(avctx);
1536 avctx->coded_frame = NULL;
1537 if (!avctx->refcounted_frames)
1538 av_frame_unref(&avctx->internal->to_free);
1539 for (i = 0; i < FF_ARRAY_ELEMS(pool->pools); i++)
1540 av_buffer_pool_uninit(&pool->pools[i]);
1541 av_freep(&avctx->internal->pool);
1542 av_freep(&avctx->internal);
1545 if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)
1546 av_opt_free(avctx->priv_data);
1548 av_freep(&avctx->priv_data);
1549 if (av_codec_is_encoder(avctx->codec))
1550 av_freep(&avctx->extradata);
1551 avctx->codec = NULL;
1552 avctx->active_thread_type = 0;
1553 entangled_thread_counter--;
1555 /* Release any user-supplied mutex. */
1557 (*lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
1562 static AVCodec *find_encdec(enum AVCodecID id, int encoder)
1564 AVCodec *p, *experimental = NULL;
1567 if ((encoder ? av_codec_is_encoder(p) : av_codec_is_decoder(p)) &&
1569 if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
1576 return experimental;
1579 AVCodec *avcodec_find_encoder(enum AVCodecID id)
1581 return find_encdec(id, 1);
1584 AVCodec *avcodec_find_encoder_by_name(const char *name)
1591 if (av_codec_is_encoder(p) && strcmp(name, p->name) == 0)
1598 AVCodec *avcodec_find_decoder(enum AVCodecID id)
1600 return find_encdec(id, 0);
1603 AVCodec *avcodec_find_decoder_by_name(const char *name)
1610 if (av_codec_is_decoder(p) && strcmp(name, p->name) == 0)
1617 static int get_bit_rate(AVCodecContext *ctx)
1620 int bits_per_sample;
1622 switch (ctx->codec_type) {
1623 case AVMEDIA_TYPE_VIDEO:
1624 case AVMEDIA_TYPE_DATA:
1625 case AVMEDIA_TYPE_SUBTITLE:
1626 case AVMEDIA_TYPE_ATTACHMENT:
1627 bit_rate = ctx->bit_rate;
1629 case AVMEDIA_TYPE_AUDIO:
1630 bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
1631 bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
1640 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
1642 int i, len, ret = 0;
1644 #define TAG_PRINT(x) \
1645 (((x) >= '0' && (x) <= '9') || \
1646 ((x) >= 'a' && (x) <= 'z') || ((x) >= 'A' && (x) <= 'Z') || \
1647 ((x) == '.' || (x) == ' '))
1649 for (i = 0; i < 4; i++) {
1650 len = snprintf(buf, buf_size,
1651 TAG_PRINT(codec_tag & 0xFF) ? "%c" : "[%d]", codec_tag & 0xFF);
1653 buf_size = buf_size > len ? buf_size - len : 0;
1660 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
1662 const char *codec_name;
1663 const char *profile = NULL;
1667 AVRational display_aspect_ratio;
1672 p = avcodec_find_encoder(enc->codec_id);
1674 p = avcodec_find_decoder(enc->codec_id);
1677 codec_name = p->name;
1678 profile = av_get_profile_name(p, enc->profile);
1679 } else if (enc->codec_id == AV_CODEC_ID_MPEG2TS) {
1680 /* fake mpeg2 transport stream codec (currently not
1682 codec_name = "mpeg2ts";
1683 } else if (enc->codec_name[0] != '\0') {
1684 codec_name = enc->codec_name;
1686 /* output avi tags */
1688 av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
1689 snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
1693 switch (enc->codec_type) {
1694 case AVMEDIA_TYPE_VIDEO:
1695 snprintf(buf, buf_size,
1697 codec_name, enc->mb_decision ? " (hq)" : "");
1699 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1701 if (enc->pix_fmt != AV_PIX_FMT_NONE) {
1702 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1704 av_get_pix_fmt_name(enc->pix_fmt));
1707 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1709 enc->width, enc->height);
1710 if (enc->sample_aspect_ratio.num) {
1711 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1712 enc->width * enc->sample_aspect_ratio.num,
1713 enc->height * enc->sample_aspect_ratio.den,
1715 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1716 " [PAR %d:%d DAR %d:%d]",
1717 enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
1718 display_aspect_ratio.num, display_aspect_ratio.den);
1720 if (av_log_get_level() >= AV_LOG_DEBUG) {
1721 int g = av_gcd(enc->time_base.num, enc->time_base.den);
1722 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1724 enc->time_base.num / g, enc->time_base.den / g);
1728 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1729 ", q=%d-%d", enc->qmin, enc->qmax);
1732 case AVMEDIA_TYPE_AUDIO:
1733 snprintf(buf, buf_size,
1737 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1739 if (enc->sample_rate) {
1740 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1741 ", %d Hz", enc->sample_rate);
1743 av_strlcat(buf, ", ", buf_size);
1744 av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
1745 if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {
1746 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1747 ", %s", av_get_sample_fmt_name(enc->sample_fmt));
1750 case AVMEDIA_TYPE_DATA:
1751 snprintf(buf, buf_size, "Data: %s", codec_name);
1753 case AVMEDIA_TYPE_SUBTITLE:
1754 snprintf(buf, buf_size, "Subtitle: %s", codec_name);
1756 case AVMEDIA_TYPE_ATTACHMENT:
1757 snprintf(buf, buf_size, "Attachment: %s", codec_name);
1760 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
1764 if (enc->flags & CODEC_FLAG_PASS1)
1765 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1767 if (enc->flags & CODEC_FLAG_PASS2)
1768 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1771 bitrate = get_bit_rate(enc);
1773 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1774 ", %d kb/s", bitrate / 1000);
1778 const char *av_get_profile_name(const AVCodec *codec, int profile)
1781 if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)
1784 for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
1785 if (p->profile == profile)
1791 unsigned avcodec_version(void)
1793 return LIBAVCODEC_VERSION_INT;
1796 const char *avcodec_configuration(void)
1798 return LIBAV_CONFIGURATION;
1801 const char *avcodec_license(void)
1803 #define LICENSE_PREFIX "libavcodec license: "
1804 return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
1807 void avcodec_flush_buffers(AVCodecContext *avctx)
1809 if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
1810 ff_thread_flush(avctx);
1811 else if (avctx->codec->flush)
1812 avctx->codec->flush(avctx);
1815 int av_get_exact_bits_per_sample(enum AVCodecID 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:
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:
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:
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:
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:
1850 case AV_CODEC_ID_PCM_F64BE:
1851 case AV_CODEC_ID_PCM_F64LE:
1858 int av_get_bits_per_sample(enum AVCodecID codec_id)
1861 case AV_CODEC_ID_ADPCM_SBPRO_2:
1863 case AV_CODEC_ID_ADPCM_SBPRO_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:
1872 return av_get_exact_bits_per_sample(codec_id);
1876 int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
1878 int id, sr, ch, ba, tag, bps;
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);
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;
1892 /* codecs with a fixed packet duration */
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;
1914 /* calc from sample rate */
1915 if (id == AV_CODEC_ID_TTA)
1916 return 256 * sr / 245;
1919 /* calc from sample rate and channels */
1920 if (id == AV_CODEC_ID_BINKAUDIO_DCT)
1921 return (480 << (sr / 22050)) / ch;
1926 /* calc from block_align */
1927 if (id == AV_CODEC_ID_SIPR) {
1929 case 20: return 160;
1930 case 19: return 144;
1931 case 29: return 288;
1932 case 37: return 480;
1934 } else if (id == AV_CODEC_ID_ILBC) {
1936 case 38: return 160;
1937 case 50: return 240;
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);
1950 /* calc from frame_bytes and bits_per_coded_sample */
1951 if (id == AV_CODEC_ID_ADPCM_G726)
1952 return frame_bytes * 8 / bps;
1956 /* calc from frame_bytes and channels */
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));
1982 /* calc from frame_bytes, channels, and codec_tag */
1983 if (id == AV_CODEC_ID_SOL_DPCM) {
1985 return frame_bytes / ch;
1987 return frame_bytes * 2 / ch;
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);
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;
2024 int ff_thread_init(AVCodecContext *s)
2031 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
2045 int ff_match_2uint16(const uint16_t(*tab)[2], int size, int a, int b)
2048 for (i = 0; i < size && !(tab[i][0] == a && tab[i][1] == b); i++) ;
2052 #if FF_API_MISSING_SAMPLE
2053 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
2055 av_log(avc, AV_LOG_WARNING, "%s is not implemented. Update your Libav "
2056 "version to the newest one from Git. If the problem still "
2057 "occurs, it means that your file has a feature which has not "
2058 "been implemented.\n", feature);
2060 av_log_ask_for_sample(avc, NULL);
2063 void av_log_ask_for_sample(void *avc, const char *msg, ...)
2065 va_list argument_list;
2067 va_start(argument_list, msg);
2070 av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
2071 av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
2072 "of this file to ftp://upload.libav.org/incoming/ "
2073 "and contact the libav-devel mailing list.\n");
2075 va_end(argument_list);
2077 #endif /* FF_API_MISSING_SAMPLE */
2079 static AVHWAccel *first_hwaccel = NULL;
2081 void av_register_hwaccel(AVHWAccel *hwaccel)
2083 AVHWAccel **p = &first_hwaccel;
2087 hwaccel->next = NULL;
2090 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
2092 return hwaccel ? hwaccel->next : first_hwaccel;
2095 AVHWAccel *ff_find_hwaccel(enum AVCodecID codec_id, enum AVPixelFormat pix_fmt)
2097 AVHWAccel *hwaccel = NULL;
2099 while ((hwaccel = av_hwaccel_next(hwaccel)))
2100 if (hwaccel->id == codec_id
2101 && hwaccel->pix_fmt == pix_fmt)
2106 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
2109 if (lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
2111 if (lockmgr_cb(&avformat_mutex, AV_LOCK_DESTROY))
2118 if (lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
2120 if (lockmgr_cb(&avformat_mutex, AV_LOCK_CREATE))
2126 int avpriv_lock_avformat(void)
2129 if ((*lockmgr_cb)(&avformat_mutex, AV_LOCK_OBTAIN))
2135 int avpriv_unlock_avformat(void)
2138 if ((*lockmgr_cb)(&avformat_mutex, AV_LOCK_RELEASE))
2144 unsigned int avpriv_toupper4(unsigned int x)
2146 return av_toupper(x & 0xFF) +
2147 (av_toupper((x >> 8) & 0xFF) << 8) +
2148 (av_toupper((x >> 16) & 0xFF) << 16) +
2149 (av_toupper((x >> 24) & 0xFF) << 24);
2152 int ff_thread_ref_frame(ThreadFrame *dst, ThreadFrame *src)
2156 dst->owner = src->owner;
2158 ret = av_frame_ref(dst->f, src->f);
2162 if (src->progress &&
2163 !(dst->progress = av_buffer_ref(src->progress))) {
2164 ff_thread_release_buffer(dst->owner, dst);
2165 return AVERROR(ENOMEM);
2173 int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
2176 return ff_get_buffer(avctx, f->f, flags);
2179 void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
2181 av_frame_unref(f->f);
2184 void ff_thread_finish_setup(AVCodecContext *avctx)
2188 void ff_thread_report_progress(ThreadFrame *f, int progress, int field)
2192 void ff_thread_await_progress(ThreadFrame *f, int progress, int field)
2198 enum AVMediaType avcodec_get_type(enum AVCodecID codec_id)
2200 if (codec_id <= AV_CODEC_ID_NONE)
2201 return AVMEDIA_TYPE_UNKNOWN;
2202 else if (codec_id < AV_CODEC_ID_FIRST_AUDIO)
2203 return AVMEDIA_TYPE_VIDEO;
2204 else if (codec_id < AV_CODEC_ID_FIRST_SUBTITLE)
2205 return AVMEDIA_TYPE_AUDIO;
2206 else if (codec_id < AV_CODEC_ID_FIRST_UNKNOWN)
2207 return AVMEDIA_TYPE_SUBTITLE;
2209 return AVMEDIA_TYPE_UNKNOWN;
2212 int avcodec_is_open(AVCodecContext *s)
2214 return !!s->internal;
2217 const uint8_t *avpriv_find_start_code(const uint8_t *restrict p,
2219 uint32_t * restrict state)
2227 for (i = 0; i < 3; i++) {
2228 uint32_t tmp = *state << 8;
2229 *state = tmp + *(p++);
2230 if (tmp == 0x100 || p == end)
2235 if (p[-1] > 1 ) p += 3;
2236 else if (p[-2] ) p += 2;
2237 else if (p[-3]|(p[-1]-1)) p++;
2244 p = FFMIN(p, end) - 4;
2245 *state = AV_RB32(p);