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Move allocation and init to defaults of the private codec contexts to avcodec_get_context_defaults3().

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That way the user app can set codec specific parameters in the private context
before opening it.

Originally committed as revision 25257 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2010-09-29 15:05:47 +00:00
parent cd17285e6c
commit dc51a72ba4
3 changed files with 44 additions and 0 deletions
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8
libavcodec/avcodec.h
View File

@ -3330,6 +3330,10 @@ void avcodec_get_context_defaults(AVCodecContext *s);
* we WILL change its arguments and name a few times! */
void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType);
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
* we WILL change its arguments and name a few times! */
int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec);
/**
* Allocate an AVCodecContext and set its fields to default values. The
* resulting struct can be deallocated by simply calling av_free().
@ -3343,6 +3347,10 @@ AVCodecContext *avcodec_alloc_context(void);
* we WILL change its arguments and name a few times! */
AVCodecContext *avcodec_alloc_context2(enum AVMediaType);
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
* we WILL change its arguments and name a few times! */
AVCodecContext *avcodec_alloc_context3(AVCodec *codec);
/**
* Copy the settings of the source AVCodecContext into the destination
* AVCodecContext. The resulting destination codec context will be

30
libavcodec/options.c
View File

@ -467,6 +467,36 @@ void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType codec_typ
s->reordered_opaque= AV_NOPTS_VALUE;
}
int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec){
avcodec_get_context_defaults2(s, codec ? codec->type : AVMEDIA_TYPE_UNKNOWN);
if(codec && codec->priv_data_size){
if(!s->priv_data){
s->priv_data= av_mallocz(codec->priv_data_size);
if (!s->priv_data) {
return AVERROR(ENOMEM);
}
}
if(codec->priv_class){
*(AVClass**)s->priv_data= codec->priv_class;
av_opt_set_defaults(s->priv_data);
}
}
return 0;
}
AVCodecContext *avcodec_alloc_context3(AVCodec *codec){
AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
if(avctx==NULL) return NULL;
if(avcodec_get_context_defaults3(avctx, codec) < 0){
av_free(avctx);
return NULL;
}
return avctx;
}
AVCodecContext *avcodec_alloc_context2(enum AVMediaType codec_type){
AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));

6
libavcodec/utils.c
View File

@ -471,11 +471,17 @@ int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
goto end;
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);
goto end;
}
if(codec->priv_class){ //this can be droped once all user apps use avcodec_get_context_defaults3()
*(AVClass**)avctx->priv_data= codec->priv_class;
av_opt_set_defaults(avctx->priv_data);
}
}
} else {
avctx->priv_data = NULL;
}