/ sometest
项目语言:C
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* utils for libavcodec
* Copyright (c) 2001 Fabrice Bellard
* Copyright (c)
Michael Niedermayer &michaelni@gmx.at&
* This file is part of FFmpeg.
* FFm you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software F either
* version 2.1 of the License, or (at your option) any later version.
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with FF if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
#include &libavutil/avassert.h&
#include &libavutil/avstring.h&
#include &libavutil/crc.h&
#include &libavutil/mathematics.h&
#include &libavutil/pixdesc.h&
#include &libavutil/audioconvert.h&
#include &libavutil/imgutils.h&
#include &libavutil/samplefmt.h&
#include &libavutil/dict.h&
#include &libavutil/avassert.h&
#include &avcodec.h&
#include &dsputil.h&
#include &libavutil/opt.h&
#include &imgconvert.h&
#include &thread.h&
#include &audioconvert.h&
#include &internal.h&
#include &bytestream.h&
#include &stdlib.h&
#include &stdarg.h&
#include &limits.h&
#include &float.h&
static int volatile entangled_thread_counter=0;
static int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
static void *codec_
static void *avformat_
void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
if(min_size & *size)
min_size= FFMAX(17*min_size/16 + 32, min_size);
ptr= av_realloc(ptr, min_size);
if(!ptr) //we could set this to the unmodified min_size but this is safer if the user lost the ptr and uses NULL now
min_size= 0;
*size= min_
static inline int ff_fast_malloc(void *ptr, unsigned int *size, size_t min_size, int zero_realloc)
void **p =
if (min_size & *size)
min_size= FFMAX(17*min_size/16 + 32, min_size);
av_free(*p);
*p = zero_realloc ? av_mallocz(min_size) : av_malloc(min_size);
if (!*p) min_size = 0;
*size= min_
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
ff_fast_malloc(ptr, size, min_size, 0);
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
uint8_t **p =
if (min_size & SIZE_MAX - FF_INPUT_BUFFER_PADDING_SIZE) {
av_freep(p);
*size = 0;
if (!ff_fast_malloc(p, size, min_size + FF_INPUT_BUFFER_PADDING_SIZE, 1))
memset(*p + min_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
/* encoder management */
static AVCodec *first_avcodec = NULL;
AVCodec *av_codec_next(AVCodec *c){
if(c) return c-&
return first_
static void avcodec_init(void)
static int initialized = 0;
if (initialized != 0)
initialized = 1;
ff_dsputil_static_init();
int av_codec_is_encoder(AVCodec *codec)
return codec && (codec-&encode || codec-&encode2);
int av_codec_is_decoder(AVCodec *codec)
return codec && codec-&
void avcodec_register(AVCodec *codec)
AVCodec **p;
avcodec_init();
p = &first_
while (*p != NULL) p = &(*p)-&
codec-&next = NULL;
if (codec-&init_static_data)
codec-&init_static_data(codec);
unsigned avcodec_get_edge_width(void)
return EDGE_WIDTH;
void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
s-&coded_width =
s-&coded_height=
s-&width = -((-width )&&s-&lowres);
s-&height= -((-height)&&s-&lowres);
#define INTERNAL_BUFFER_SIZE (32+1)
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
int linesize_align[AV_NUM_DATA_POINTERS])
int w_align= 1;
int h_align= 1;
switch(s-&pix_fmt){
case PIX_FMT_YUV420P:
case PIX_FMT_YUYV422:
case PIX_FMT_UYVY422:
case PIX_FMT_YUV422P:
case PIX_FMT_YUV440P:
case PIX_FMT_YUV444P:
case PIX_FMT_GBRP:
case PIX_FMT_GRAY8:
case PIX_FMT_GRAY16BE:
case PIX_FMT_GRAY16LE:
case PIX_FMT_YUVJ420P:
case PIX_FMT_YUVJ422P:
case PIX_FMT_YUVJ440P:
case PIX_FMT_YUVJ444P:
case PIX_FMT_YUVA420P:
case PIX_FMT_YUVA422P:
case PIX_FMT_YUVA444P:
case PIX_FMT_YUV420P9LE:
case PIX_FMT_YUV420P9BE:
case PIX_FMT_YUV420P10LE:
case PIX_FMT_YUV420P10BE:
case PIX_FMT_YUV422P9LE:
case PIX_FMT_YUV422P9BE:
case PIX_FMT_YUV422P10LE:
case PIX_FMT_YUV422P10BE:
case PIX_FMT_YUV444P9LE:
case PIX_FMT_YUV444P9BE:
case PIX_FMT_YUV444P10LE:
case PIX_FMT_YUV444P10BE:
case PIX_FMT_GBRP9LE:
case PIX_FMT_GBRP9BE:
case PIX_FMT_GBRP10LE:
case PIX_FMT_GBRP10BE:
w_align = 16; //FIXME assume 16 pixel per macroblock
h_align = 16 * 2; // interlaced needs 2 macroblocks height
case PIX_FMT_YUV411P:
case PIX_FMT_UYYVYY411:
w_align=32;
h_align=8;
case PIX_FMT_YUV410P:
if(s-&codec_id == CODEC_ID_SVQ1){
w_align=64;
h_align=64;
case PIX_FMT_RGB555:
if(s-&codec_id == CODEC_ID_RPZA){
w_align=4;
h_align=4;
case PIX_FMT_PAL8:
case PIX_FMT_BGR8:
case PIX_FMT_RGB8:
if(s-&codec_id == CODEC_ID_SMC){
w_align=4;
h_align=4;
case PIX_FMT_BGR24:
if((s-&codec_id == CODEC_ID_MSZH) || (s-&codec_id == CODEC_ID_ZLIB)){
w_align=4;
h_align=4;
w_align= 1;
h_align= 1;
if(s-&codec_id == CODEC_ID_IFF_ILBM || s-&codec_id == CODEC_ID_IFF_BYTERUN1){
w_align= FFMAX(w_align, 8);
*width = FFALIGN(*width , w_align);
*height= FFALIGN(*height, h_align);
if(s-&codec_id == CODEC_ID_H264 || s-&lowres)
*height+=2; // some of the optimized chroma MC reads one line too much
// which is also done in mpeg decoders with lowres & 0
for (i = 0; i & 4; i++)
linesize_align[i] = STRIDE_ALIGN;
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
int chroma_shift = av_pix_fmt_descriptors[s-&pix_fmt].log2_chroma_w;
int linesize_align[AV_NUM_DATA_POINTERS];
avcodec_align_dimensions2(s, width, height, linesize_align);
align = FFMAX(linesize_align[0], linesize_align[3]);
linesize_align[1] &&= chroma_
linesize_align[2] &&= chroma_
align = FFMAX3(align, linesize_align[1], linesize_align[2]);
*width=FFALIGN(*width, align);
void ff_init_buffer_info(AVCodecContext *s, AVFrame *pic)
if (s-&pkt) {
pic-&pkt_pts = s-&pkt-&
pic-&pkt_pos = s-&pkt-&
pic-&pkt_pts = AV_NOPTS_VALUE;
pic-&pkt_pos = -1;
pic-&reordered_opaque= s-&reordered_
pic-&sample_aspect_ratio = s-&sample_aspect_
pic-&width
pic-&height
pic-&format
int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
enum AVSampleFormat sample_fmt, const uint8_t *buf,
int buf_size, int align)
int ch, planar, needed_size, ret = 0;
needed_size = av_samples_get_buffer_size(NULL, nb_channels,
frame-&nb_samples, sample_fmt,
if (buf_size & needed_size)
return AVERROR(EINVAL);
planar = av_sample_fmt_is_planar(sample_fmt);
if (planar && nb_channels & AV_NUM_DATA_POINTERS) {
if (!(frame-&extended_data = av_mallocz(nb_channels *
sizeof(*frame-&extended_data))))
return AVERROR(ENOMEM);
frame-&extended_data = frame-&
if ((ret = av_samples_fill_arrays(frame-&extended_data, &frame-&linesize[0],
(uint8_t *)(intptr_t)buf, nb_channels, frame-&nb_samples,
sample_fmt, align)) & 0) {
if (frame-&extended_data != frame-&data)
av_freep(&frame-&extended_data);
if (frame-&extended_data != frame-&data) {
for (ch = 0; ch & AV_NUM_DATA_POINTERS; ch++)
frame-&data[ch] = frame-&extended_data[ch];
static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
AVCodecInternal *avci = avctx-&
InternalBuffer *
int buf_size,
buf_size = av_samples_get_buffer_size(NULL, avctx-&channels,
frame-&nb_samples, avctx-&sample_fmt,
if (buf_size & 0)
return AVERROR(EINVAL);
/* allocate InternalBuffer if needed */
if (!avci-&buffer) {
avci-&buffer = av_mallocz(sizeof(InternalBuffer));
if (!avci-&buffer)
return AVERROR(ENOMEM);
buf = avci-&
/* if there is a previously-used internal buffer, check its size and
channel count to see if we can reuse it */
if (buf-&extended_data) {
/* if current buffer is too small, free it */
if (buf-&extended_data[0] && buf_size & buf-&audio_data_size) {
av_free(buf-&extended_data[0]);
if (buf-&extended_data != buf-&data)
av_freep(&buf-&extended_data);
buf-&extended_data = NULL;
buf-&data[0] = NULL;
/* if number of channels has changed, reset and/or free extended data
pointers but leave data buffer in buf-&data[0] for reuse */
if (buf-&nb_channels != avctx-&channels) {
if (buf-&extended_data != buf-&data)
av_free(buf-&extended_data);
buf-&extended_data = NULL;
/* if there is no previous buffer or the previous buffer cannot be used
as-is, allocate a new buffer and/or rearrange the channel pointers */
if (!buf-&extended_data) {
if (!buf-&data[0]) {
if (!(buf-&data[0] = av_mallocz(buf_size)))
return AVERROR(ENOMEM);
buf-&audio_data_size = buf_
if ((ret = avcodec_fill_audio_frame(frame, avctx-&channels,
avctx-&sample_fmt, buf-&data[0],
buf-&audio_data_size, 0)))
if (frame-&extended_data == frame-&data)
buf-&extended_data = buf-&
buf-&extended_data = frame-&extended_
memcpy(buf-&data, frame-&data, sizeof(frame-&data));
buf-&linesize[0] = frame-&linesize[0];
buf-&nb_channels = avctx-&
/* copy InternalBuffer info to the AVFrame */
frame-&extended_data = buf-&extended_
frame-&linesize[0]
= buf-&linesize[0];
memcpy(frame-&data, buf-&data, sizeof(frame-&data));
frame-&type
= FF_BUFFER_TYPE_INTERNAL;
if (avctx-&pkt) {
frame-&pkt_pts = avctx-&pkt-&
frame-&pkt_pos = avctx-&pkt-&
frame-&pkt_pts = AV_NOPTS_VALUE;
frame-&pkt_pos = -1;
frame-&reordered_opaque = avctx-&reordered_
frame-&sample_rate
= avctx-&sample_
frame-&format
= avctx-&sample_
frame-&channel_layout = avctx-&channel_
if (avctx-&debug & FF_DEBUG_BUFFERS)
av_log(avctx, AV_LOG_DEBUG, &default_get_buffer called on frame %p, &
&internal audio buffer used\n&, frame);
static int video_get_buffer(AVCodecContext *s, AVFrame *pic)
int w= s-&
int h= s-&
InternalBuffer *
AVCodecInternal *avci = s-&
if(pic-&data[0]!=NULL) {
av_log(s, AV_LOG_ERROR, &pic-&data[0]!=NULL in avcodec_default_get_buffer\n&);
return -1;
if(avci-&buffer_count &= INTERNAL_BUFFER_SIZE) {
av_log(s, AV_LOG_ERROR, &buffer_count overflow (missing release_buffer?)\n&);
return -1;
if(av_image_check_size(w, h, 0, s) || s-&pix_fmt&0)
return -1;
if (!avci-&buffer) {
avci-&buffer = av_mallocz((INTERNAL_BUFFER_SIZE+1) *
sizeof(InternalBuffer));
buf = &avci-&buffer[avci-&buffer_count];
if(buf-&base[0] && (buf-&width != w || buf-&height != h || buf-&pix_fmt != s-&pix_fmt)){
for (i = 0; i & AV_NUM_DATA_POINTERS; i++) {
av_freep(&buf-&base[i]);
buf-&data[i]= NULL;
if (!buf-&base[0]) {
int h_chroma_shift, v_chroma_
int size[4] = {0};
int stride_align[AV_NUM_DATA_POINTERS];
const int pixel_size = av_pix_fmt_descriptors[s-&pix_fmt].comp[0].step_minus1+1;
avcodec_get_chroma_sub_sample(s-&pix_fmt, &h_chroma_shift, &v_chroma_shift);
avcodec_align_dimensions2(s, &w, &h, stride_align);
if(!(s-&flags&CODEC_FLAG_EMU_EDGE)){
w+= EDGE_WIDTH*2;
h+= EDGE_WIDTH*2;
// NOTE: do not align linesizes individually, this breaks e.g. assumptions
// that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
av_image_fill_linesizes(picture.linesize, s-&pix_fmt, w);
// increase alignment of w for next try (rhs gives the lowest bit set in w)
w += w & ~(w-1);
unaligned = 0;
for (i=0; i&4; i++){
unaligned |= picture.linesize[i] % stride_align[i];
} while (unaligned);
tmpsize = av_image_fill_pointers(picture.data, s-&pix_fmt, h, NULL, picture.linesize);
if (tmpsize & 0)
return -1;
for (i=0; i&3 && picture.data[i+1]; i++)
size[i] = picture.data[i+1] - picture.data[i];
size[i] = tmpsize - (picture.data[i] - picture.data[0]);
memset(buf-&base, 0, sizeof(buf-&base));
memset(buf-&data, 0, sizeof(buf-&data));
for(i=0; i&4 && size[i]; i++){
const int h_shift= i==0 ? 0 : h_chroma_
const int v_shift= i==0 ? 0 : v_chroma_
buf-&linesize[i]= picture.linesize[i];
buf-&base[i]= av_malloc(size[i]+16); //FIXME 16
if(buf-&base[i]==NULL) return -1;
memset(buf-&base[i], 128, size[i]);
// no edge if EDGE EMU or not planar YUV
if((s-&flags&CODEC_FLAG_EMU_EDGE) || !size[2])
buf-&data[i] = buf-&base[i];
buf-&data[i] = buf-&base[i] + FFALIGN((buf-&linesize[i]*EDGE_WIDTH&&v_shift) + (pixel_size*EDGE_WIDTH&&h_shift), stride_align[i]);
for (; i & AV_NUM_DATA_POINTERS; i++) {
buf-&base[i] = buf-&data[i] = NULL;
buf-&linesize[i] = 0;
if(size[1] && !size[2])
ff_set_systematic_pal2((uint32_t*)buf-&data[1], s-&pix_fmt);
buf-&width
buf-&height = s-&
buf-&pix_fmt= s-&pix_
pic-&type= FF_BUFFER_TYPE_INTERNAL;
for (i = 0; i & AV_NUM_DATA_POINTERS; i++) {
pic-&base[i]= buf-&base[i];
pic-&data[i]= buf-&data[i];
pic-&linesize[i]= buf-&linesize[i];
pic-&extended_data = pic-&
avci-&buffer_count++;
pic-&width
pic-&height = buf-&
pic-&format = buf-&pix_
pic-&sample_aspect_ratio = s-&sample_aspect_
if (s-&pkt) {
pic-&pkt_pts = s-&pkt-&
pic-&pkt_pos = s-&pkt-&
pic-&pkt_pts = AV_NOPTS_VALUE;
pic-&pkt_pos = -1;
pic-&reordered_opaque= s-&reordered_
pic-&sample_aspect_ratio = s-&sample_aspect_
pic-&width
pic-&height
pic-&format
if(s-&debug&FF_DEBUG_BUFFERS)
av_log(s, AV_LOG_DEBUG, &default_get_buffer called on pic %p, %d &
&buffers used\n&, pic, avci-&buffer_count);
int avcodec_default_get_buffer(AVCodecContext *avctx, AVFrame *frame)
switch (avctx-&codec_type) {
case AVMEDIA_TYPE_VIDEO:
return video_get_buffer(avctx, frame);
case AVMEDIA_TYPE_AUDIO:
return audio_get_buffer(avctx, frame);
return -1;
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
InternalBuffer *buf, *
AVCodecInternal *avci = s-&
av_assert0(s-&codec_type == AVMEDIA_TYPE_VIDEO);
assert(pic-&type==FF_BUFFER_TYPE_INTERNAL);
assert(avci-&buffer_count);
if (avci-&buffer) {
buf = NULL; /* avoids warning */
for (i = 0; i & avci-&buffer_ i++) { //just 3-5 checks so is not worth to optimize
buf = &avci-&buffer[i];
if (buf-&data[0] == pic-&data[0])
av_assert0(i & avci-&buffer_count);
avci-&buffer_count--;
last = &avci-&buffer[avci-&buffer_count];
if (buf != last)
FFSWAP(InternalBuffer, *buf, *last);
for (i = 0; i & AV_NUM_DATA_POINTERS; i++) {
pic-&data[i]=NULL;
pic-&base[i]=NULL;
//printf(&R%X\n&, pic-&opaque);
if(s-&debug&FF_DEBUG_BUFFERS)
av_log(s, AV_LOG_DEBUG, &default_release_buffer called on pic %p, %d &
&buffers used\n&, pic, avci-&buffer_count);
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
AVFrame temp_
av_assert0(s-&codec_type == AVMEDIA_TYPE_VIDEO);
if (pic-&data[0] && (pic-&width != s-&width || pic-&height != s-&height || pic-&format != s-&pix_fmt)) {
av_log(s, AV_LOG_WARNING, &Picture changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s in reget buffer()\n&,
pic-&width, pic-&height, av_get_pix_fmt_name(pic-&format), s-&width, s-&height, av_get_pix_fmt_name(s-&pix_fmt));
s-&release_buffer(s, pic);
ff_init_buffer_info(s, pic);
/* If no picture return a new buffer */
if(pic-&data[0] == NULL) {
/* We will copy from buffer, so must be readable */
pic-&buffer_hints |= FF_BUFFER_HINTS_READABLE;
return s-&get_buffer(s, pic);
assert(s-&pix_fmt == pic-&format);
/* If internal buffer type return the same buffer */
if(pic-&type == FF_BUFFER_TYPE_INTERNAL) {
* Not internal type and reget_buffer not overridden, emulate cr buffer
temp_pic = *
for(i = 0; i & AV_NUM_DATA_POINTERS; i++)
pic-&data[i] = pic-&base[i] = NULL;
pic-&opaque = NULL;
/* Allocate new frame */
if (s-&get_buffer(s, pic))
return -1;
/* Copy image data from old buffer to new buffer */
av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s-&pix_fmt, s-&width,
s-&height);
s-&release_buffer(s, &temp_pic); // Release old frame
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
for(i=0; i& i++){
int r= func(c, (char*)arg + i*size);
if(ret) ret[i]=
int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){
for(i=0; i& i++){
int r= func(c, arg, i, 0);
if(ret) ret[i]=
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
return fmt[0];
void avcodec_get_frame_defaults(AVFrame *pic){
memset(pic, 0, sizeof(AVFrame));
pic-&pts = pic-&pkt_dts = pic-&pkt_pts = pic-&best_effort_timestamp = AV_NOPTS_VALUE;
pic-&pkt_pos = -1;
pic-&key_frame= 1;
pic-&sample_aspect_ratio = (AVRational){0, 1};
pic-&format = -1;
/* unknown */
AVFrame *avcodec_alloc_frame(void){
AVFrame *pic= av_malloc(sizeof(AVFrame));
if(pic==NULL) return NULL;
avcodec_get_frame_defaults(pic);
#define MAKE_ACCESSORS(str, name, type, field) \
type av_##name##_get_##field(const str *s) { return s-& } \
void av_##name##_set_##field(str *s, type v) { s-&field = }
MAKE_ACCESSORS(AVFrame, frame, int64_t, best_effort_timestamp)
MAKE_ACCESSORS(AVFrame, frame, int64_t, pkt_pos)
MAKE_ACCESSORS(AVFrame, frame, int64_t, channel_layout)
MAKE_ACCESSORS(AVFrame, frame, int,
sample_rate)
static void avcodec_get_subtitle_defaults(AVSubtitle *sub)
memset(sub, 0, sizeof(*sub));
sub-&pts = AV_NOPTS_VALUE;
static int get_bit_rate(AVCodecContext *ctx)
int bits_per_
switch(ctx-&codec_type) {
case AVMEDIA_TYPE_VIDEO:
case AVMEDIA_TYPE_DATA:
case AVMEDIA_TYPE_SUBTITLE:
case AVMEDIA_TYPE_ATTACHMENT:
bit_rate = ctx-&bit_
case AVMEDIA_TYPE_AUDIO:
bits_per_sample = av_get_bits_per_sample(ctx-&codec_id);
bit_rate = bits_per_sample ? ctx-&sample_rate * ctx-&channels * bits_per_sample : ctx-&bit_
bit_rate = 0;
return bit_
#if FF_API_AVCODEC_OPEN
int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
return avcodec_open2(avctx, codec, NULL);
int attribute_align_arg avcodec_open2(AVCodecContext *avctx, AVCodec *codec, AVDictionary **options)
int ret = 0;
AVDictionary *tmp = NULL;
if (avcodec_is_open(avctx))
if ((!codec && !avctx-&codec)) {
av_log(avctx, AV_LOG_ERROR, &No codec provided to avcodec_open2().\n&);
return AVERROR(EINVAL);
if ((codec && avctx-&codec && codec != avctx-&codec)) {
av_log(avctx, AV_LOG_ERROR, &This AVCodecContext was allocated for %s, &
&but %s passed to avcodec_open2().\n&, avctx-&codec-&name, codec-&name);
return AVERROR(EINVAL);
if (!codec)
codec = avctx-&
if (avctx-&extradata_size & 0 || avctx-&extradata_size &= FF_MAX_EXTRADATA_SIZE)
return AVERROR(EINVAL);
if (options)
av_dict_copy(&tmp, *options, 0);
/* If there is a user-supplied mutex locking routine, call it. */
if (ff_lockmgr_cb) {
if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
return -1;
entangled_thread_counter++;
if(entangled_thread_counter != 1){
av_log(avctx, AV_LOG_ERROR, &insufficient thread locking around avcodec_open/close()\n&);
avctx-&internal = av_mallocz(sizeof(AVCodecInternal));
if (!avctx-&internal) {
ret = AVERROR(ENOMEM);
if (codec-&priv_data_size & 0) {
if(!avctx-&priv_data){
avctx-&priv_data = av_mallocz(codec-&priv_data_size);
if (!avctx-&priv_data) {
ret = AVERROR(ENOMEM);
if (codec-&priv_class) {
*(const AVClass**)avctx-&priv_data= codec-&priv_
av_opt_set_defaults(avctx-&priv_data);
if (codec-&priv_class && (ret = av_opt_set_dict(avctx-&priv_data, &tmp)) & 0)
goto free_and_
avctx-&priv_data = NULL;
if ((ret = av_opt_set_dict(avctx, &tmp)) & 0)
goto free_and_
if (codec-&capabilities & CODEC_CAP_EXPERIMENTAL)
if (avctx-&strict_std_compliance & FF_COMPLIANCE_EXPERIMENTAL) {
av_log(avctx, AV_LOG_ERROR, &Codec is experimental but experimental codecs are not enabled, try -strict -2\n&);
goto free_and_
//We only call avcodec_set_dimensions() for non h264 codecs so as not to overwrite previously setup dimensions
if(!( avctx-&coded_width && avctx-&coded_height && avctx-&width && avctx-&height && avctx-&codec_id == CODEC_ID_H264)){
if(avctx-&coded_width && avctx-&coded_height)
avcodec_set_dimensions(avctx, avctx-&coded_width, avctx-&coded_height);
else if(avctx-&width && avctx-&height)
avcodec_set_dimensions(avctx, avctx-&width, avctx-&height);
if ((avctx-&coded_width || avctx-&coded_height || avctx-&width || avctx-&height)
av_image_check_size(avctx-&coded_width, avctx-&coded_height, 0, avctx) & 0
|| av_image_check_size(avctx-&width,
avctx-&height,
0, avctx) & 0)) {
av_log(avctx, AV_LOG_WARNING, &ignoring invalid width/height values\n&);
avcodec_set_dimensions(avctx, 0, 0);
/* if the decoder init function was already called previously,
free the already allocated subtitle_header before overwriting it */
if (av_codec_is_decoder(codec))
av_freep(&avctx-&subtitle_header);
#define SANE_NB_CHANNELS 128U
if (avctx-&channels & SANE_NB_CHANNELS) {
ret = AVERROR(EINVAL);
goto free_and_
avctx-&codec =
if ((avctx-&codec_type == AVMEDIA_TYPE_UNKNOWN || avctx-&codec_type == codec-&type) &&
avctx-&codec_id == CODEC_ID_NONE) {
avctx-&codec_type = codec-&
avctx-&codec_id
if (avctx-&codec_id != codec-&id || (avctx-&codec_type != codec-&type
&& avctx-&codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
av_log(avctx, AV_LOG_ERROR, &codec type or id mismatches\n&);
ret = AVERROR(EINVAL);
goto free_and_
avctx-&frame_number = 0;
if (avctx-&codec_type == AVMEDIA_TYPE_AUDIO &&
(!avctx-&time_base.num || !avctx-&time_base.den)) {
avctx-&time_base.num = 1;
avctx-&time_base.den = avctx-&sample_
if (!HAVE_THREADS)
av_log(avctx, AV_LOG_WARNING, &Warning: not compiled with thread support, using thread emulation\n&);
if (HAVE_THREADS && !avctx-&thread_opaque) {
ret = ff_thread_init(avctx);
if (ret & 0) {
goto free_and_
if (!HAVE_THREADS && !(codec-&capabilities & CODEC_CAP_AUTO_THREADS))
avctx-&thread_count = 1;
if (avctx-&codec-&max_lowres & avctx-&lowres || avctx-&lowres & 0) {
av_log(avctx, AV_LOG_ERROR, &The maximum value for lowres supported by the decoder is %d\n&,
avctx-&codec-&max_lowres);
ret = AVERROR(EINVAL);
goto free_and_
if (av_codec_is_encoder(avctx-&codec)) {
if (avctx-&codec-&sample_fmts) {
for (i = 0; avctx-&codec-&sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++)
if (avctx-&sample_fmt == avctx-&codec-&sample_fmts[i])
if (avctx-&codec-&sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
av_log(avctx, AV_LOG_ERROR, &Specified sample_fmt is not supported.\n&);
ret = AVERROR(EINVAL);
goto free_and_
if (avctx-&codec-&pix_fmts) {
for (i = 0; avctx-&codec-&pix_fmts[i] != PIX_FMT_NONE; i++)
if (avctx-&pix_fmt == avctx-&codec-&pix_fmts[i])
if (avctx-&codec-&pix_fmts[i] == PIX_FMT_NONE) {
av_log(avctx, AV_LOG_ERROR, &Specified pix_fmt is not supported\n&);
ret = AVERROR(EINVAL);
goto free_and_
if (avctx-&codec-&supported_samplerates) {
for (i = 0; avctx-&codec-&supported_samplerates[i] != 0; i++)
if (avctx-&sample_rate == avctx-&codec-&supported_samplerates[i])
if (avctx-&codec-&supported_samplerates[i] == 0) {
av_log(avctx, AV_LOG_ERROR, &Specified sample_rate is not supported\n&);
ret = AVERROR(EINVAL);
goto free_and_
if (avctx-&codec-&channel_layouts) {
if (!avctx-&channel_layout) {
av_log(avctx, AV_LOG_WARNING, &channel_layout not specified\n&);
for (i = 0; avctx-&codec-&channel_layouts[i] != 0; i++)
if (avctx-&channel_layout == avctx-&codec-&channel_layouts[i])
if (avctx-&codec-&channel_layouts[i] == 0) {
av_log(avctx, AV_LOG_ERROR, &Specified channel_layout is not supported\n&);
ret = AVERROR(EINVAL);
goto free_and_
if (avctx-&channel_layout && avctx-&channels) {
if (av_get_channel_layout_nb_channels(avctx-&channel_layout) != avctx-&channels) {
av_log(avctx, AV_LOG_ERROR, &channel layout does not match number of channels\n&);
ret = AVERROR(EINVAL);
goto free_and_
} else if (avctx-&channel_layout) {
avctx-&channels = av_get_channel_layout_nb_channels(avctx-&channel_layout);
avctx-&pts_correction_num_faulty_pts =
avctx-&pts_correction_num_faulty_dts = 0;
avctx-&pts_correction_last_pts =
avctx-&pts_correction_last_dts = INT64_MIN;
if(avctx-&codec-&init && !(avctx-&active_thread_type&FF_THREAD_FRAME)){
ret = avctx-&codec-&init(avctx);
if (ret & 0) {
goto free_and_
if (av_codec_is_decoder(avctx-&codec)) {
if (!avctx-&bit_rate)
avctx-&bit_rate = get_bit_rate(avctx);
/* validate channel layout from the decoder */
if (avctx-&channel_layout &&
av_get_channel_layout_nb_channels(avctx-&channel_layout) != avctx-&channels) {
av_log(avctx, AV_LOG_WARNING, &channel layout does not match number of channels\n&);
avctx-&channel_layout = 0;
entangled_thread_counter--;
/* Release any user-supplied mutex. */
if (ff_lockmgr_cb) {
(*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
if (options) {
av_dict_free(options);
*options =
free_and_end:
av_dict_free(&tmp);
av_freep(&avctx-&priv_data);
av_freep(&avctx-&internal);
avctx-&codec= NULL;
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int size)
if (size & 0 || avpkt-&size & 0 || size & INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE) {
av_log(avctx, AV_LOG_ERROR, &Size %d invalid\n&, size);
return AVERROR(EINVAL);
av_assert0(!avpkt-&data || avpkt-&data != avctx-&internal-&byte_buffer);
if (!avpkt-&data || avpkt-&size & size) {
av_fast_padded_malloc(&avctx-&internal-&byte_buffer, &avctx-&internal-&byte_buffer_size, size);
avpkt-&data = avctx-&internal-&byte_
avpkt-&size = avctx-&internal-&byte_buffer_
avpkt-&destruct = NULL;
if (avpkt-&data) {
void *destruct = avpkt-&
if (avpkt-&size & size) {
av_log(avctx, AV_LOG_ERROR, &User packet is too small (%d & %d)\n&, avpkt-&size, size);
return AVERROR(EINVAL);
av_init_packet(avpkt);
avpkt-&destruct =
avpkt-&size =
int ret = av_new_packet(avpkt, size);
if (ret & 0)
av_log(avctx, AV_LOG_ERROR, &Failed to allocate packet of size %d\n&, size);
int ff_alloc_packet(AVPacket *avpkt, int size)
return ff_alloc_packet2(NULL, avpkt, size);
* Pad last frame with silence.
static int pad_last_frame(AVCodecContext *s, AVFrame **dst, const AVFrame *src)
AVFrame *frame = NULL;
uint8_t *buf
if (!(frame = avcodec_alloc_frame()))
return AVERROR(ENOMEM);
*frame = *
if ((ret = av_samples_get_buffer_size(&frame-&linesize[0], s-&channels,
s-&frame_size, s-&sample_fmt, 0)) & 0)
if (!(buf = av_malloc(ret))) {
ret = AVERROR(ENOMEM);
frame-&nb_samples = s-&frame_
if ((ret = avcodec_fill_audio_frame(frame, s-&channels, s-&sample_fmt,
buf, ret, 0)) & 0)
if ((ret = av_samples_copy(frame-&extended_data, src-&extended_data, 0, 0,
src-&nb_samples, s-&channels, s-&sample_fmt)) & 0)
if ((ret = av_samples_set_silence(frame-&extended_data, src-&nb_samples,
frame-&nb_samples - src-&nb_samples,
s-&channels, s-&sample_fmt)) & 0)
if (frame-&extended_data != frame-&data)
av_freep(&frame-&extended_data);
av_freep(&buf);
av_freep(&frame);
int attribute_align_arg avcodec_encode_audio2(AVCodecContext *avctx,
AVPacket *avpkt,
const AVFrame *frame,
int *got_packet_ptr)
AVFrame *padded_frame = NULL;
AVPacket user_pkt = *
int needs_realloc = !user_pkt.
*got_packet_ptr = 0;
if (!(avctx-&codec-&capabilities & CODEC_CAP_DELAY) && !frame) {
av_free_packet(avpkt);
av_init_packet(avpkt);
/* ensure that extended_data is properly set */
if (frame && !frame-&extended_data) {
if (av_sample_fmt_is_planar(avctx-&sample_fmt) &&
avctx-&channels & AV_NUM_DATA_POINTERS) {
av_log(avctx, AV_LOG_ERROR, &Encoding to a planar sample format, &
&with more than %d channels, but extended_data is not set.\n&,
AV_NUM_DATA_POINTERS);
return AVERROR(EINVAL);
av_log(avctx, AV_LOG_WARNING, &extended_data is not set.\n&);
tmp.extended_data = tmp.
/* check for valid frame size */
if (frame) {
if (avctx-&codec-&capabilities & CODEC_CAP_SMALL_LAST_FRAME) {
if (frame-&nb_samples & avctx-&frame_size)
return AVERROR(EINVAL);
} else if (!(avctx-&codec-&capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)) {
if (frame-&nb_samples & avctx-&frame_size &&
!avctx-&internal-&last_audio_frame) {
ret = pad_last_frame(avctx, &padded_frame, frame);
if (ret & 0)
frame = padded_
avctx-&internal-&last_audio_frame = 1;
if (frame-&nb_samples != avctx-&frame_size)
return AVERROR(EINVAL);
ret = avctx-&codec-&encode2(avctx, avpkt, frame, got_packet_ptr);
if (!ret) {
if (*got_packet_ptr) {
if (!(avctx-&codec-&capabilities & CODEC_CAP_DELAY)) {
if (avpkt-&pts == AV_NOPTS_VALUE)
avpkt-&pts = frame-&
if (!avpkt-&duration)
avpkt-&duration = ff_samples_to_time_base(avctx,
frame-&nb_samples);
avpkt-&dts = avpkt-&
avpkt-&size = 0;
if (avpkt-&data && avpkt-&data == avctx-&internal-&byte_buffer) {
needs_realloc = 0;
if (user_pkt.data) {
if (user_pkt.size &= avpkt-&size) {
memcpy(user_pkt.data, avpkt-&data, avpkt-&size);
av_log(avctx, AV_LOG_ERROR, &Provided packet is too small, needs to be %d\n&, avpkt-&size);
avpkt-&size = user_pkt.
avpkt-&data
= user_pkt.
avpkt-&destruct = user_pkt.
if (av_dup_packet(avpkt) & 0) {
ret = AVERROR(ENOMEM);
if (!ret) {
if (needs_realloc && avpkt-&data) {
uint8_t *new_data = av_realloc(avpkt-&data, avpkt-&size + FF_INPUT_BUFFER_PADDING_SIZE);
if (new_data)
avpkt-&data = new_
avctx-&frame_number++;
if (ret & 0 || !*got_packet_ptr) {
av_free_packet(avpkt);
av_init_packet(avpkt);
/* NOTE: if we add any audio encoders which output non-keyframe packets,
this needs to be moved to the encoders, but for now we can do it
here to simplify things */
avpkt-&flags |= AV_PKT_FLAG_KEY;
if (padded_frame) {
av_freep(&padded_frame-&data[0]);
if (padded_frame-&extended_data != padded_frame-&data)
av_freep(&padded_frame-&extended_data);
av_freep(&padded_frame);
#if FF_API_OLD_DECODE_AUDIO
int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx,
uint8_t *buf, int buf_size,
const short *samples)
AVFrame frame0;
int ret, samples_size, got_
av_init_packet(&pkt);
pkt.data =
pkt.size = buf_
if (samples) {
frame = &frame0;
avcodec_get_frame_defaults(frame);
if (avctx-&frame_size) {
frame-&nb_samples = avctx-&frame_
/* if frame_size is not set, the number of samples must be
calculated from the buffer size */
int64_t nb_
if (!av_get_bits_per_sample(avctx-&codec_id)) {
av_log(avctx, AV_LOG_ERROR, &avcodec_encode_audio() does not &
&support this codec\n&);
return AVERROR(EINVAL);
nb_samples = (int64_t)buf_size * 8 /
(av_get_bits_per_sample(avctx-&codec_id) *
avctx-&channels);
if (nb_samples &= INT_MAX)
return AVERROR(EINVAL);
frame-&nb_samples = nb_
/* it is assumed that the samples buffer is large enough based on the
relevant parameters */
samples_size = av_samples_get_buffer_size(NULL, avctx-&channels,
frame-&nb_samples,
avctx-&sample_fmt, 1);
if ((ret = avcodec_fill_audio_frame(frame, avctx-&channels,
avctx-&sample_fmt,
(const uint8_t *) samples,
samples_size, 1)))
/* fabricate frame pts from sample count.
this is needed because the avcodec_encode_audio() API does not have
a way for the user to provide pts */
if(avctx-&sample_rate && avctx-&time_base.num)
frame-&pts = ff_samples_to_time_base(avctx,
avctx-&internal-&sample_count);
frame-&pts = AV_NOPTS_VALUE;
avctx-&internal-&sample_count += frame-&nb_
frame = NULL;
got_packet = 0;
ret = avcodec_encode_audio2(avctx, &pkt, frame, &got_packet);
if (!ret && got_packet && avctx-&coded_frame) {
avctx-&coded_frame-&pts
avctx-&coded_frame-&key_frame = !!(pkt.flags & AV_PKT_FLAG_KEY);
/* free any side data since we cannot return it */
ff_packet_free_side_data(&pkt);
if (frame && frame-&extended_data != frame-&data)
av_freep(&frame-&extended_data);
return ret ? ret : pkt.
#if FF_API_OLD_ENCODE_VIDEO
int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
const AVFrame *pict)
int ret, got_packet = 0;
if(buf_size & FF_MIN_BUFFER_SIZE){
av_log(avctx, AV_LOG_ERROR, &buffer smaller than minimum size\n&);
return -1;
av_init_packet(&pkt);
pkt.data =
pkt.size = buf_
ret = avcodec_encode_video2(avctx, &pkt, pict, &got_packet);
if (!ret && got_packet && avctx-&coded_frame) {
avctx-&coded_frame-&pts
avctx-&coded_frame-&key_frame = !!(pkt.flags & AV_PKT_FLAG_KEY);
/* free any side data since we cannot return it */
if (pkt.side_data_elems & 0) {
for (i = 0; i & pkt.side_data_ i++)
av_free(pkt.side_data[i].data);
av_freep(&pkt.side_data);
pkt.side_data_elems = 0;
return ret ? ret : pkt.
int attribute_align_arg avcodec_encode_video2(AVCodecContext *avctx,
AVPacket *avpkt,
const AVFrame *frame,
int *got_packet_ptr)
AVPacket user_pkt = *
int needs_realloc = !user_pkt.
*got_packet_ptr = 0;
if (!(avctx-&codec-&capabilities & CODEC_CAP_DELAY) && !frame) {
av_free_packet(avpkt);
av_init_packet(avpkt);
avpkt-&size
if (av_image_check_size(avctx-&width, avctx-&height, 0, avctx))
return AVERROR(EINVAL);
av_assert0(avctx-&codec-&encode2);
ret = avctx-&codec-&encode2(avctx, avpkt, frame, got_packet_ptr);
av_assert0(ret &= 0);
if (avpkt-&data && avpkt-&data == avctx-&internal-&byte_buffer) {
needs_realloc = 0;
if (user_pkt.data) {
if (user_pkt.size &= avpkt-&size) {
memcpy(user_pkt.data, avpkt-&data, avpkt-&size);
av_log(avctx, AV_LOG_ERROR, &Provided packet is too small, needs to be %d\n&, avpkt-&size);
avpkt-&size = user_pkt.
avpkt-&data
= user_pkt.
avpkt-&destruct = user_pkt.
if (av_dup_packet(avpkt) & 0) {
ret = AVERROR(ENOMEM);
if (!ret) {
if (!*got_packet_ptr)
avpkt-&size = 0;
else if (!(avctx-&codec-&capabilities & CODEC_CAP_DELAY))
avpkt-&pts = avpkt-&dts = frame-&
if (needs_realloc && avpkt-&data &&
avpkt-&destruct == av_destruct_packet) {
uint8_t *new_data = av_realloc(avpkt-&data, avpkt-&size + FF_INPUT_BUFFER_PADDING_SIZE);
if (new_data)
avpkt-&data = new_
avctx-&frame_number++;
if (ret & 0 || !*got_packet_ptr)
av_free_packet(avpkt);
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
const AVSubtitle *sub)
if(sub-&start_display_time) {
av_log(avctx, AV_LOG_ERROR, &start_display_time must be 0.\n&);
return -1;
ret = avctx-&codec-&encode(avctx, buf, buf_size, (void *)(intptr_t)sub);
avctx-&frame_number++;
* Attempt to guess proper monotonic timestamps for decoded video frames
* which might have incorrect times. Input timestamps may wrap around, in
* which case the output will as well.
* @param pts the pts field of the decoded AVPacket, as passed through
* AVFrame.pkt_pts
* @param dts the dts field of the decoded AVPacket
* @return one of the input values, may be AV_NOPTS_VALUE
static int64_t guess_correct_pts(AVCodecContext *ctx,
int64_t reordered_pts, int64_t dts)
int64_t pts = AV_NOPTS_VALUE;
if (dts != AV_NOPTS_VALUE) {
ctx-&pts_correction_num_faulty_dts += dts &= ctx-&pts_correction_last_
ctx-&pts_correction_last_dts =
if (reordered_pts != AV_NOPTS_VALUE) {
ctx-&pts_correction_num_faulty_pts += reordered_pts &= ctx-&pts_correction_last_
ctx-&pts_correction_last_pts = reordered_
if ((ctx-&pts_correction_num_faulty_pts&=ctx-&pts_correction_num_faulty_dts || dts == AV_NOPTS_VALUE)
&& reordered_pts != AV_NOPTS_VALUE)
pts = reordered_
static void apply_param_change(AVCodecContext *avctx, AVPacket *avpkt)
int size = 0;
const uint8_t *
if (!(avctx-&codec-&capabilities & CODEC_CAP_PARAM_CHANGE))
data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size);
if (!data || size & 4)
flags = bytestream_get_le32(&data);
size -= 4;
if (size & 4) /* Required for any of the changes */
if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) {
avctx-&channels = bytestream_get_le32(&data);
size -= 4;
if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) {
if (size & 8)
avctx-&channel_layout = bytestream_get_le64(&data);
size -= 8;
if (size & 4)
if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) {
avctx-&sample_rate = bytestream_get_le32(&data);
size -= 4;
if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) {
if (size & 8)
avctx-&width
= bytestream_get_le32(&data);
avctx-&height = bytestream_get_le32(&data);
avcodec_set_dimensions(avctx, avctx-&width, avctx-&height);
size -= 8;
int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
int *got_picture_ptr,
const AVPacket *avpkt)
// copy to ensure we do not change avpkt
AVPacket tmp = *
if (avctx-&codec-&type != AVMEDIA_TYPE_VIDEO) {
av_log(avctx, AV_LOG_ERROR, &Invalid media type for video\n&);
return AVERROR(EINVAL);
*got_picture_ptr= 0;
if((avctx-&coded_width||avctx-&coded_height) && av_image_check_size(avctx-&coded_width, avctx-&coded_height, 0, avctx))
return -1;
if((avctx-&codec-&capabilities & CODEC_CAP_DELAY) || avpkt-&size || (avctx-&active_thread_type&FF_THREAD_FRAME)){
int did_split = av_packet_split_side_data(&tmp);
apply_param_change(avctx, &tmp);
avctx-&pkt = &
if (HAVE_THREADS && avctx-&active_thread_type&FF_THREAD_FRAME)
ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr,
ret = avctx-&codec-&decode(avctx, picture, got_picture_ptr,
picture-&pkt_dts= avpkt-&
if(!avctx-&has_b_frames){
picture-&pkt_pos= avpkt-&
//FIXME these should be under if(!avctx-&has_b_frames)
if (!picture-&sample_aspect_ratio.num)
picture-&sample_aspect_ratio = avctx-&sample_aspect_
if (!picture-&width)
picture-&width = avctx-&
if (!picture-&height)
picture-&height = avctx-&
if (picture-&format == PIX_FMT_NONE)
picture-&format = avctx-&pix_
emms_c(); //needed to avoid an emms_c() call
avctx-&pkt = NULL;
if (did_split) {
ff_packet_free_side_data(&tmp);
if(ret == tmp.size)
ret = avpkt-&
if (*got_picture_ptr){
avctx-&frame_number++;
picture-&best_effort_timestamp = guess_correct_pts(avctx,
picture-&pkt_pts,
picture-&pkt_dts);
#if FF_API_OLD_DECODE_AUDIO
int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
int *frame_size_ptr,
AVPacket *avpkt)
int ret, got_frame = 0;
if (avctx-&get_buffer != avcodec_default_get_buffer) {
av_log(avctx, AV_LOG_ERROR, &Custom get_buffer() for use with&
&avcodec_decode_audio3() detected. Overriding with avcodec_default_get_buffer\n&);
av_log(avctx, AV_LOG_ERROR, &Please port your application to &
&avcodec_decode_audio4()\n&);
avctx-&get_buffer = avcodec_default_get_
avctx-&release_buffer = avcodec_default_release_
ret = avcodec_decode_audio4(avctx, &frame, &got_frame, avpkt);
if (ret &= 0 && got_frame) {
int ch, plane_
int planar = av_sample_fmt_is_planar(avctx-&sample_fmt);
int data_size = av_samples_get_buffer_size(&plane_size, avctx-&channels,
frame.nb_samples,
avctx-&sample_fmt, 1);
if (*frame_size_ptr & data_size) {
av_log(avctx, AV_LOG_ERROR, &output buffer size is too small for &
&the current frame (%d & %d)\n&, *frame_size_ptr, data_size);
return AVERROR(EINVAL);
memcpy(samples, frame.extended_data[0], plane_size);
if (planar && avctx-&channels & 1) {
uint8_t *out = ((uint8_t *)samples) + plane_
for (ch = 1; ch & avctx-& ch++) {
memcpy(out, frame.extended_data[ch], plane_size);
out += plane_
*frame_size_ptr = data_
*frame_size_ptr = 0;
int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
AVFrame *frame,
int *got_frame_ptr,
const AVPacket *avpkt)
int ret = 0;
*got_frame_ptr = 0;
if (!avpkt-&data && avpkt-&size) {
av_log(avctx, AV_LOG_ERROR, &invalid packet: NULL data, size != 0\n&);
return AVERROR(EINVAL);
if (avctx-&codec-&type != AVMEDIA_TYPE_AUDIO) {
av_log(avctx, AV_LOG_ERROR, &Invalid media type for audio\n&);
return AVERROR(EINVAL);
if ((avctx-&codec-&capabilities & CODEC_CAP_DELAY) || avpkt-&size) {
// copy to ensure we do not change avpkt
AVPacket tmp = *
int did_split = av_packet_split_side_data(&tmp);
apply_param_change(avctx, &tmp);
avctx-&pkt = &
ret = avctx-&codec-&decode(avctx, frame, got_frame_ptr, &tmp);
if (ret &= 0 && *got_frame_ptr) {
avctx-&frame_number++;
frame-&pkt_dts = avpkt-&
if (frame-&format == AV_SAMPLE_FMT_NONE)
frame-&format = avctx-&sample_
if (!frame-&channel_layout)
frame-&channel_layout = avctx-&channel_
if (!frame-&sample_rate)
frame-&sample_rate = avctx-&sample_
avctx-&pkt = NULL;
if (did_split) {
ff_packet_free_side_data(&tmp);
if(ret == tmp.size)
ret = avpkt-&
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
int *got_sub_ptr,
AVPacket *avpkt)
if (avctx-&codec-&type != AVMEDIA_TYPE_SUBTITLE) {
av_log(avctx, AV_LOG_ERROR, &Invalid media type for subtitles\n&);
return AVERROR(EINVAL);
avctx-&pkt =
*got_sub_ptr = 0;
avcodec_get_subtitle_defaults(sub);
ret = avctx-&codec-&decode(avctx, sub, got_sub_ptr, avpkt);
if (*got_sub_ptr)
avctx-&frame_number++;
void avsubtitle_free(AVSubtitle *sub)
for (i = 0; i & sub-&num_ i++)
av_freep(&sub-&rects[i]-&pict.data[0]);
av_freep(&sub-&rects[i]-&pict.data[1]);
av_freep(&sub-&rects[i]-&pict.data[2]);
av_freep(&sub-&rects[i]-&pict.data[3]);
av_freep(&sub-&rects[i]-&text);
av_freep(&sub-&rects[i]-&ass);
av_freep(&sub-&rects[i]);
av_freep(&sub-&rects);
memset(sub, 0, sizeof(AVSubtitle));
av_cold int avcodec_close(AVCodecContext *avctx)
/* If there is a user-supplied mutex locking routine, call it. */
if (ff_lockmgr_cb) {
if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
return -1;
entangled_thread_counter++;
if(entangled_thread_counter != 1){
av_log(avctx, AV_LOG_ERROR, &insufficient thread locking around avcodec_open/close()\n&);
entangled_thread_counter--;
return -1;
if (avcodec_is_open(avctx)) {
if (HAVE_THREADS && avctx-&thread_opaque)
ff_thread_free(avctx);
if (avctx-&codec && avctx-&codec-&close)
avctx-&codec-&close(avctx);
avcodec_default_free_buffers(avctx);
avctx-&coded_frame = NULL;
avctx-&internal-&byte_buffer_size = 0;
av_freep(&avctx-&internal-&byte_buffer);
av_freep(&avctx-&internal);
if (avctx-&priv_data && avctx-&codec && avctx-&codec-&priv_class)
av_opt_free(avctx-&priv_data);
av_opt_free(avctx);
av_freep(&avctx-&priv_data);
if (av_codec_is_encoder(avctx-&codec))
av_freep(&avctx-&extradata);
avctx-&codec = NULL;
avctx-&active_thread_type = 0;
entangled_thread_counter--;
/* Release any user-supplied mutex. */
if (ff_lockmgr_cb) {
(*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
static enum CodecID remap_deprecated_codec_id(enum CodecID id)
switch(id){
//This is for future deprecatec codec ids, its empty since
//last major bump but will fill up again over time, please dont remove it
case CODEC_ID_UTVIDEO_DEPRECATED: return CODEC_ID_UTVIDEO;
AVCodec *avcodec_find_encoder(enum CodecID id)
AVCodec *p, *experimental=NULL;
p = first_
id= remap_deprecated_codec_id(id);
while (p) {
if (av_codec_is_encoder(p) && p-&id == id) {
if (p-&capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
experimental =
AVCodec *avcodec_find_encoder_by_name(const char *name)
AVCodec *p;
if (!name)
return NULL;
p = first_
while (p) {
if (av_codec_is_encoder(p) && strcmp(name,p-&name) == 0)
return NULL;
AVCodec *avcodec_find_decoder(enum CodecID id)
AVCodec *p, *experimental=NULL;
p = first_
id= remap_deprecated_codec_id(id);
while (p) {
if (av_codec_is_decoder(p) && p-&id == id) {
if (p-&capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
experimental =
AVCodec *avcodec_find_decoder_by_name(const char *name)
AVCodec *p;
if (!name)
return NULL;
p = first_
while (p) {
if (av_codec_is_decoder(p) && strcmp(name,p-&name) == 0)
return NULL;
const char *avcodec_get_name(enum CodecID id)
#if !CONFIG_SMALL
switch (id) {
#include &libavcodec/codec_names.h&
av_log(NULL, AV_LOG_WARNING, &Codec 0x%x is not in the full list.\n&, id);
codec = avcodec_find_decoder(id);
if (codec)
return codec-&
codec = avcodec_find_encoder(id);
if (codec)
return codec-&
return &unknown_codec&;
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
int i, len, ret = 0;
for (i = 0; i & 4; i++) {
len = snprintf(buf, buf_size,
isprint(codec_tag&0xFF) ? &%c& : &[%d]&, codec_tag&0xFF);
= buf_size & len ? buf_size - len : 0;
codec_tag&&=8;
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
const char *codec_
const char *codec_
const char *profile = NULL;
AVCodec *p;
AVRational display_aspect_
if (!buf || buf_size &= 0)
codec_type = av_get_media_type_string(enc-&codec_type);
codec_name = avcodec_get_name(enc-&codec_id);
if (enc-&profile != FF_PROFILE_UNKNOWN) {
if (enc-&codec)
p = encode ? avcodec_find_encoder(enc-&codec_id) :
avcodec_find_decoder(enc-&codec_id);
profile = av_get_profile_name(p, enc-&profile);
snprintf(buf, buf_size, &%s: %s%s&, codec_type ? codec_type : &unknown&,
codec_name, enc-&mb_decision ? & (hq)& : &&);
buf[0] ^= 'a' ^ 'A'; /* first letter in uppercase */
if (profile)
snprintf(buf + strlen(buf), buf_size - strlen(buf), & (%s)&, profile);
if (enc-&codec_tag) {
char tag_buf[32];
av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc-&codec_tag);
snprintf(buf + strlen(buf), buf_size - strlen(buf),
& (%s / 0x%04X)&, tag_buf, enc-&codec_tag);
switch(enc-&codec_type) {
case AVMEDIA_TYPE_VIDEO:
if (enc-&pix_fmt != PIX_FMT_NONE) {
snprintf(buf + strlen(buf), buf_size - strlen(buf),
av_get_pix_fmt_name(enc-&pix_fmt));
if (enc-&width) {
snprintf(buf + strlen(buf), buf_size - strlen(buf),
&, %dx%d&,
enc-&width, enc-&height);
if (enc-&sample_aspect_ratio.num) {
av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
enc-&width*enc-&sample_aspect_ratio.num,
enc-&height*enc-&sample_aspect_ratio.den,
snprintf(buf + strlen(buf), buf_size - strlen(buf),
& [SAR %d:%d DAR %d:%d]&,
enc-&sample_aspect_ratio.num, enc-&sample_aspect_ratio.den,
display_aspect_ratio.num, display_aspect_ratio.den);
if(av_log_get_level() &= AV_LOG_DEBUG){
int g= av_gcd(enc-&time_base.num, enc-&time_base.den);
snprintf(buf + strlen(buf), buf_size - strlen(buf),
&, %d/%d&,
enc-&time_base.num/g, enc-&time_base.den/g);
if (encode) {
snprintf(buf + strlen(buf), buf_size - strlen(buf),
&, q=%d-%d&, enc-&qmin, enc-&qmax);
case AVMEDIA_TYPE_AUDIO:
if (enc-&sample_rate) {
snprintf(buf + strlen(buf), buf_size - strlen(buf),
&, %d Hz&, enc-&sample_rate);
av_strlcat(buf, &, &, buf_size);
av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc-&channels, enc-&channel_layout);
if (enc-&sample_fmt != AV_SAMPLE_FMT_NONE) {
snprintf(buf + strlen(buf), buf_size - strlen(buf),
&, %s&, av_get_sample_fmt_name(enc-&sample_fmt));
if (encode) {
if (enc-&flags & CODEC_FLAG_PASS1)
snprintf(buf + strlen(buf), buf_size - strlen(buf),
&, pass 1&);
if (enc-&flags & CODEC_FLAG_PASS2)
snprintf(buf + strlen(buf), buf_size - strlen(buf),
&, pass 2&);
bitrate = get_bit_rate(enc);
if (bitrate != 0) {
snprintf(buf + strlen(buf), buf_size - strlen(buf),
&, %d kb/s&, bitrate / 1000);
const char *av_get_profile_name(const AVCodec *codec, int profile)
const AVProfile *p;
if (profile == FF_PROFILE_UNKNOWN || !codec-&profiles)
return NULL;
for (p = codec-& p-&profile != FF_PROFILE_UNKNOWN; p++)
if (p-&profile == profile)
return p-&
return NULL;
unsigned avcodec_version( void )
av_assert0(CODEC_ID_V410==164);
av_assert0(CODEC_ID_PCM_S8_PLANAR==65563);
av_assert0(CODEC_ID_ADPCM_G722==69660);
av_assert0(CODEC_ID_BMV_AUDIO==86071);
av_assert0(CODEC_ID_SRT==94216);
av_assert0(LIBAVCODEC_VERSION_MICRO &= 100);
return LIBAVCODEC_VERSION_INT;
const char *avcodec_configuration(void)
return FFMPEG_CONFIGURATION;
const char *avcodec_license(void)
#define LICENSE_PREFIX &libavcodec license: &
return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
void avcodec_flush_buffers(AVCodecContext *avctx)
if(HAVE_THREADS && avctx-&active_thread_type&FF_THREAD_FRAME)
ff_thread_flush(avctx);
else if(avctx-&codec-&flush)
avctx-&codec-&flush(avctx);
avctx-&pts_correction_last_pts =
avctx-&pts_correction_last_dts = INT64_MIN;
static void video_free_buffers(AVCodecContext *s)
AVCodecInternal *avci = s-&
if (!avci-&buffer)
if (avci-&buffer_count)
av_log(s, AV_LOG_WARNING, &Found %i unreleased buffers!\n&,
avci-&buffer_count);
for(i=0; i&INTERNAL_BUFFER_SIZE; i++){
InternalBuffer *buf = &avci-&buffer[i];
for(j=0; j&4; j++){
av_freep(&buf-&base[j]);
buf-&data[j]= NULL;
av_freep(&avci-&buffer);
avci-&buffer_count=0;
static void audio_free_buffers(AVCodecContext *avctx)
AVCodecInternal *avci = avctx-&
InternalBuffer *
if (!avci-&buffer)
buf = avci-&
if (buf-&extended_data) {
av_free(buf-&extended_data[0]);
if (buf-&extended_data != buf-&data)
av_freep(&buf-&extended_data);
av_freep(&avci-&buffer);
void avcodec_default_free_buffers(AVCodecContext *avctx)
switch (avctx-&codec_type) {
case AVMEDIA_TYPE_VIDEO:
video_free_buffers(avctx);
case AVMEDIA_TYPE_AUDIO:
audio_free_buffers(avctx);
int av_get_exact_bits_per_sample(enum CodecID codec_id)
switch(codec_id){
case CODEC_ID_ADPCM_CT:
case CODEC_ID_ADPCM_IMA_APC:
case CODEC_ID_ADPCM_IMA_EA_SEAD:
case CODEC_ID_ADPCM_IMA_WS:
case CODEC_ID_ADPCM_G722:
case CODEC_ID_ADPCM_YAMAHA:
case CODEC_ID_PCM_ALAW:
case CODEC_ID_PCM_MULAW:
case CODEC_ID_PCM_S8:
case CODEC_ID_PCM_U8:
case CODEC_ID_PCM_ZORK:
case CODEC_ID_PCM_S16BE:
case CODEC_ID_PCM_S16LE:
case CODEC_ID_PCM_S16LE_PLANAR:
case CODEC_ID_PCM_U16BE:
case CODEC_ID_PCM_U16LE:
return 16;
case CODEC_ID_PCM_S24DAUD:
case CODEC_ID_PCM_S24BE:
case CODEC_ID_PCM_S24LE:
case CODEC_ID_PCM_U24BE:
case CODEC_ID_PCM_U24LE:
return 24;
case CODEC_ID_PCM_S32BE:
case CODEC_ID_PCM_S32LE:
case CODEC_ID_PCM_U32BE:
case CODEC_ID_PCM_U32LE:
case CODEC_ID_PCM_F32BE:
case CODEC_ID_PCM_F32LE:
return 32;
case CODEC_ID_PCM_F64BE:
case CODEC_ID_PCM_F64LE:
return 64;
enum CodecID av_get_pcm_codec(enum AVSampleFormat fmt, int be)
static const enum CodecID map[AV_SAMPLE_FMT_NB][2] = {
[AV_SAMPLE_FMT_U8
] = { CODEC_ID_PCM_U8,
CODEC_ID_PCM_U8
[AV_SAMPLE_FMT_S16 ] = { CODEC_ID_PCM_S16LE, CODEC_ID_PCM_S16BE },
[AV_SAMPLE_FMT_S32 ] = { CODEC_ID_PCM_S32LE, CODEC_ID_PCM_S32BE },
[AV_SAMPLE_FMT_FLT ] = { CODEC_ID_PCM_F32LE, CODEC_ID_PCM_F32BE },
[AV_SAMPLE_FMT_DBL ] = { CODEC_ID_PCM_F64LE, CODEC_ID_PCM_F64BE },
[AV_SAMPLE_FMT_U8P ] = { CODEC_ID_PCM_U8,
CODEC_ID_PCM_U8
[AV_SAMPLE_FMT_S16P] = { CODEC_ID_PCM_S16LE, CODEC_ID_PCM_S16BE },
[AV_SAMPLE_FMT_S32P] = { CODEC_ID_PCM_S32LE, CODEC_ID_PCM_S32BE },
[AV_SAMPLE_FMT_FLTP] = { CODEC_ID_PCM_F32LE, CODEC_ID_PCM_F32BE },
[AV_SAMPLE_FMT_DBLP] = { CODEC_ID_PCM_F64LE, CODEC_ID_PCM_F64BE },
if (fmt & 0 || fmt &= AV_SAMPLE_FMT_NB)
return CODEC_ID_NONE;
if (be & 0 || be & 1)
be = AV_NE(1, 0);
return map[fmt][be];
int av_get_bits_per_sample(enum CodecID codec_id)
switch (codec_id) {
case CODEC_ID_ADPCM_SBPRO_2:
case CODEC_ID_ADPCM_SBPRO_3:
case CODEC_ID_ADPCM_SBPRO_4:
case CODEC_ID_ADPCM_IMA_WAV:
case CODEC_ID_ADPCM_IMA_QT:
case CODEC_ID_ADPCM_SWF:
case CODEC_ID_ADPCM_MS:
return av_get_exact_bits_per_sample(codec_id);
int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
int id, sr, ch, ba, tag,
= avctx-&codec_
= avctx-&sample_
= avctx-&block_
tag = avctx-&codec_
bps = av_get_exact_bits_per_sample(avctx-&codec_id);
/* codecs with an exact constant bits per sample */
if (bps & 0 && ch & 0 && frame_bytes & 0 && ch & 32768 && bps & 32768)
return (frame_bytes * 8LL) / (bps * ch);
bps = avctx-&bits_per_coded_
/* codecs with a fixed packet duration */
switch (id) {
case CODEC_ID_ADPCM_ADX:
case CODEC_ID_ADPCM_IMA_QT: return
case CODEC_ID_ADPCM_EA_XAS: return
case CODEC_ID_AMR_NB:
case CODEC_ID_GSM:
case CODEC_ID_QCELP:
case CODEC_ID_RA_144:
case CODEC_ID_RA_288:
case CODEC_ID_IMC:
case CODEC_ID_AMR_WB:
case CODEC_ID_GSM_MS:
case CODEC_ID_MP1:
case CODEC_ID_ATRAC1:
case CODEC_ID_ATRAC3:
return 1024;
case CODEC_ID_MP2:
case CODEC_ID_MUSEPACK7:
return 1152;
case CODEC_ID_AC3:
return 1536;
if (sr & 0) {
/* calc from sample rate */
if (id == CODEC_ID_TTA)
return 256 * sr / 245;
if (ch & 0) {
/* calc from sample rate and channels */
if (id == CODEC_ID_BINKAUDIO_DCT)
return (480 && (sr / 22050)) /
if (ba & 0) {
/* calc from block_align */
if (id == CODEC_ID_SIPR) {
switch (ba) {
case 20: return 160;
case 19: return 144;
case 29: return 288;
case 37: return 480;
if (frame_bytes & 0) {
/* calc from frame_bytes only */
if (id == CODEC_ID_TRUESPEECH)
return 240 * (frame_bytes / 32);
if (id == CODEC_ID_NELLYMOSER)
return 256 * (frame_bytes / 64);
if (bps & 0) {
/* calc from frame_bytes and bits_per_coded_sample */
if (id == CODEC_ID_ADPCM_G726)
return frame_bytes * 8 /
if (ch & 0) {
/* calc from frame_bytes and channels */
switch (id) {
case CODEC_ID_ADPCM_4XM:
case CODEC_ID_ADPCM_IMA_ISS:
return (frame_bytes - 4 * ch) * 2 /
case CODEC_ID_ADPCM_IMA_SMJPEG:
return (frame_bytes - 4) * 2 /
case CODEC_ID_ADPCM_IMA_AMV:
return (frame_bytes - 8) * 2 /
case CODEC_ID_ADPCM_XA:
return (frame_bytes / 128) * 224 /
case CODEC_ID_INTERPLAY_DPCM:
return (frame_bytes - 6 - ch) /
case CODEC_ID_ROQ_DPCM:
return (frame_bytes - 8) /
case CODEC_ID_XAN_DPCM:
return (frame_bytes - 2 * ch) /
case CODEC_ID_MACE3:
return 3 * frame_bytes /
case CODEC_ID_MACE6:
return 6 * frame_bytes /
case CODEC_ID_PCM_LXF:
return 2 * (frame_bytes / (5 * ch));
if (tag) {
/* calc from frame_bytes, channels, and codec_tag */
if (id == CODEC_ID_SOL_DPCM) {
if (tag == 3)
return frame_bytes /
return frame_bytes * 2 /
if (ba & 0) {
/* calc from frame_bytes, channels, and block_align */
int blocks = frame_bytes /
switch (avctx-&codec_id) {
case CODEC_ID_ADPCM_IMA_WAV:
return blocks * (1 + (ba - 4 * ch) / (4 * ch) * 8);
case CODEC_ID_ADPCM_IMA_DK3:
return blocks * (((ba - 16) * 2 / 3 * 4) / ch);
case CODEC_ID_ADPCM_IMA_DK4:
return blocks * (1 + (ba - 4 * ch) * 2 / ch);
case CODEC_ID_ADPCM_MS:
return blocks * (2 + (ba - 7 * ch) * 2 / ch);
if (bps & 0) {
/* calc from frame_bytes, channels, and bits_per_coded_sample */
switch (avctx-&codec_id) {
case CODEC_ID_PCM_DVD:
return 2 * (frame_bytes / ((bps * 2 / 8) * ch));
case CODEC_ID_PCM_BLURAY:
return frame_bytes / ((FFALIGN(ch, 2) * bps) / 8);
case CODEC_ID_S302M:
return 2 * (frame_bytes / ((bps + 4) / 4)) /
#if !HAVE_THREADS
int ff_thread_init(AVCodecContext *s){
return -1;
unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
unsigned int n = 0;
while(v &= 0xff) {
int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
for(i=0; i&size && !(tab[i][0]==a && tab[i][1]==b); i++);
void av_log_missing_feature(void *avc, const char *feature, int want_sample)
av_log(avc, AV_LOG_WARNING, &%s not implemented. Update your FFmpeg &
&version to the newest one from Git. If the problem still &
&occurs, it means that your file has a feature which has not &
&been implemented.\n&, feature);
if(want_sample)
av_log_ask_for_sample(avc, NULL);
void av_log_ask_for_sample(void *avc, const char *msg, ...)
va_list argument_
va_start(argument_list, msg);
av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
av_log(avc, AV_LOG_WARNING, &If you want to help, upload a sample &
&of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ &
&and contact the ffmpeg-devel mailing list.\n&);
va_end(argument_list);
static AVHWAccel *first_hwaccel = NULL;
void av_register_hwaccel(AVHWAccel *hwaccel)
AVHWAccel **p = &first_
while (*p)
p = &(*p)-&
hwaccel-&next = NULL;
AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
return hwaccel ? hwaccel-&next : first_
AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
AVHWAccel *hwaccel=NULL;
while((hwaccel= av_hwaccel_next(hwaccel))){
hwaccel-&id
== codec_id
&& hwaccel-&pix_fmt == pix_fmt)
return NULL;
int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
if (ff_lockmgr_cb) {
if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
return -1;
if (ff_lockmgr_cb(&avformat_mutex, AV_LOCK_DESTROY))
return -1;
ff_lockmgr_cb =
if (ff_lockmgr_cb) {
if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
return -1;
if (ff_lockmgr_cb(&avformat_mutex, AV_LOCK_CREATE))
return -1;
int avpriv_lock_avformat(void)
if (ff_lockmgr_cb) {
if ((*ff_lockmgr_cb)(&avformat_mutex, AV_LOCK_OBTAIN))
return -1;
int avpriv_unlock_avformat(void)
if (ff_lockmgr_cb) {
if ((*ff_lockmgr_cb)(&avformat_mutex, AV_LOCK_RELEASE))
return -1;
unsigned int avpriv_toupper4(unsigned int x)
toupper( x
+ (toupper((x&&8 )&0xFF)&&8 )
+ (toupper((x&&16)&0xFF)&&16)
+ (toupper((x&&24)&0xFF)&&24);
#if !HAVE_THREADS
int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f)
f-&owner =
ff_init_buffer_info(avctx, f);
return avctx-&get_buffer(avctx, f);
void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f)
f-&owner-&release_buffer(f-&owner, f);
void ff_thread_finish_setup(AVCodecContext *avctx)
void ff_thread_report_progress(AVFrame *f, int progress, int field)
void ff_thread_await_progress(AVFrame *f, int progress, int field)
int ff_thread_can_start_frame(AVCodecContext *avctx)
enum AVMediaType avcodec_get_type(enum CodecID codec_id)
AVCodec *c= avcodec_find_decoder(codec_id);
c= avcodec_find_encoder(codec_id);
return c-&
if (codec_id &= CODEC_ID_NONE)
return AVMEDIA_TYPE_UNKNOWN;
else if (codec_id & CODEC_ID_FIRST_AUDIO)
return AVMEDIA_TYPE_VIDEO;
else if (codec_id & CODEC_ID_FIRST_SUBTITLE)
return AVMEDIA_TYPE_AUDIO;
else if (codec_id & CODEC_ID_FIRST_UNKNOWN)
return AVMEDIA_TYPE_SUBTITLE;
return AVMEDIA_TYPE_UNKNOWN;
int avcodec_is_open(AVCodecContext *s)
return !!s-&
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