On 29/04/13 10:19, Steffen wrote:
I want to provide a list of codesc that is supported by a file format. I try
to iterate over the codec_tag element in avoutputformat . But this is
impossible because it's private. What can I do?
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From some I code I borrowed from ffmpeg.
static void ffmpeg_codecs(fltk::Browser& browser, int type)
{
using namespace std;
AVCodec *p, *p2;
const char* last_name;
std::ostringstream o;
last_name= "000";
for(;;){
int decode=0;
int encode=0;
int cap=0;
const char *type_str;
p2=NULL;
for(p = av_codec_next(NULL); p; p = av_codec_next(p) ) {
if((p2==NULL || strcmp(p->name, p2->name)<0) &&
strcmp(p->name, last_name)>0){
p2= p;
decode= encode= cap=0;
}
if(p2 && strcmp(p->name, p2->name)==0){
if(p->decode) decode=1;
if(p->encode2) encode=1;
cap |= p->capabilities;
}
}
if(p2==NULL)
break;
last_name= p2->name;
if ( p2->type != type )
continue;
switch(p2->type) {
case AVMEDIA_TYPE_VIDEO:
type_str = "V";
break;
case AVMEDIA_TYPE_AUDIO:
type_str = "A";
break;
case AVMEDIA_TYPE_SUBTITLE:
type_str = "S";
break;
default:
type_str = "?";
break;
}
std::ostringstream o;
o << ( decode ? "D\t" : " \t" )
<< ( encode ? "E\t" : " \t" )
<< "\t"
<< ( cap & CODEC_CAP_DRAW_HORIZ_BAND ? "S\t":" \t" )
<< ( cap & CODEC_CAP_DR1 ? "D\t":" \t" )
<< ( cap & CODEC_CAP_TRUNCATED ? "T\t":" \t" )
<< p2->name;
browser.add( o.str().c_str() );
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