Codec*
Codec::guessEncodingCodec(MuxerFormat* pFmt, const char* shortName,
const char* url, const char* mimeType, MediaDescriptor::Type type) {
Global::init();
Codec* retval = 0;
RefPointer<MuxerFormat> fmt = 0;
AVOutputFormat * oFmt = 0;
// We acquire here because the RefPointer always
// releases.
fmt.reset(dynamic_cast<MuxerFormat*>(pFmt), true);
if (!fmt) {
fmt = MuxerFormat::guessFormat(shortName, url, mimeType);
}
if (fmt) oFmt = fmt->getCtx();
// Make sure at least one in put is specified.
// The av_guess_codec function REQUIRES a
// non null AVOutputFormat
// It also examines url with a strcmp(), so let's
// give it a zero-length string.
// In reality, it ignores the other params.
if (!url) url = "";
if (oFmt) {
enum AVCodecID id = av_guess_codec(oFmt, shortName, url, mimeType,
(enum AVMediaType) type);
retval = Codec::findEncodingCodecByIntID((int) id);
}
return retval;
}
void
Coder::open(KeyValueBag* inputOptions, KeyValueBag* aUnsetOptions) {
int32_t retval = -1;
AVDictionary* tmp=0;
try {
// Time to set options
if (inputOptions) {
KeyValueBagImpl* options = dynamic_cast<KeyValueBagImpl*>(inputOptions);
// make a copy of the data returned.
av_dict_copy(&tmp, options->getDictionary(), 0);
}
// first we're going to set options (and we'll set them again later)
retval = av_opt_set_dict(mCtx, &tmp);
FfmpegException::check(retval, "could not set options on coder");
// we check that the options passed in our valid
checkOptionsBeforeOpen();
RefPointer<Codec> codec = getCodec();
// we pass in the options again because codec-specific options can be set.
retval = avcodec_open2(mCtx, codec->getCtx(), &tmp);
FfmpegException::check(retval, "could not open codec");
setState(STATE_OPENED);
if (aUnsetOptions)
{
KeyValueBagImpl* unsetOptions = dynamic_cast<KeyValueBagImpl*>(aUnsetOptions);
unsetOptions->copy(tmp);
}
if (tmp)
av_dict_free(&tmp);
} catch (...) {
setState(STATE_ERROR);
if (tmp)
av_dict_free(&tmp);
throw;
}
}