/*----------------------------------------------------------------------
| Mp4Parser_SetupAudioOutput
+---------------------------------------------------------------------*/
static BLT_Result
Mp4Parser_SetupAudioOutput(Mp4Parser* self, AP4_Movie* movie)
{
ATX_Properties* properties = NULL;
// select the audio track
if (BLT_SUCCEEDED(BLT_Stream_GetProperties(ATX_BASE(self, BLT_BaseMediaNode).context, &properties))) {
ATX_PropertyValue value;
bool selector_is_strict = false;
if (ATX_SUCCEEDED(ATX_Properties_GetProperty(properties,
BLT_STREAM_AUDIO_TRACK_SELECTOR_STRICT_PROPERTY,
&value))) {
if (value.type == ATX_PROPERTY_VALUE_TYPE_BOOLEAN) {
selector_is_strict = value.data.boolean == ATX_TRUE;
}
}
if (ATX_SUCCEEDED(ATX_Properties_GetProperty(properties,
BLT_STREAM_AUDIO_TRACK_SELECTOR_INDEX_PROPERTY,
&value))) {
if (value.type == ATX_PROPERTY_VALUE_TYPE_INTEGER) {
ATX_LOG_INFO_1("selecting audio track by index (%d)", value.data.integer);
self->audio_output.track = movie->GetTrack(AP4_Track::TYPE_AUDIO, value.data.integer);
if (self->audio_output.track == NULL) {
ATX_LOG_INFO("track not found");
if (selector_is_strict) return BLT_SUCCESS;
}
}
} else if (ATX_SUCCEEDED(ATX_Properties_GetProperty(properties,
BLT_STREAM_AUDIO_TRACK_SELECTOR_ID_PROPERTY,
&value))) {
if (value.type == ATX_PROPERTY_VALUE_TYPE_INTEGER) {
ATX_LOG_INFO_1("selecting audio track by ID (%d)", value.data.integer);
self->audio_output.track = movie->GetTrack((AP4_UI32)value.data.integer);
if (self->audio_output.track == NULL) {
ATX_LOG_INFO("track not found");
if (selector_is_strict) return BLT_SUCCESS;
} else if (self->audio_output.track->GetType() != AP4_Track::TYPE_AUDIO) {
ATX_LOG_INFO("track is not audio");
if (selector_is_strict) return BLT_SUCCESS;
}
}
}
}
// select the first audio track if no specific track was selected
if (self->audio_output.track == NULL) {
ATX_LOG_INFO("selecting first audio track");
self->audio_output.track = movie->GetTrack(AP4_Track::TYPE_AUDIO);
}
// exit now if the track does not exist
if (self->audio_output.track == NULL) return BLT_SUCCESS;
ATX_LOG_INFO_1("found audio track (id=%d)", self->audio_output.track->GetId());
// use the first sample description by default
return Mp4ParserOutput_SetSampleDescription(&self->audio_output, 0);
}
/*----------------------------------------------------------------------
| BLT_Decoder_GetStreamProperties
+---------------------------------------------------------------------*/
BLT_Result
BLT_Decoder_GetStreamProperties(BLT_Decoder* decoder,
ATX_Properties** properties)
{
return BLT_Stream_GetProperties(decoder->stream, properties);
}
