/*----------------------------------------------------------------------
| BLT_Decoder_GetVolume
+---------------------------------------------------------------------*/
BLT_Result
BLT_Decoder_GetVolume(BLT_Decoder* decoder, float* volume)
{
BLT_MediaNode* output_node;
BLT_Result result;
/* check parameters */
if (volume == NULL) return BLT_ERROR_INVALID_PARAMETERS;
/* default value */
*volume = 0.0f;
/* get the volume from the output node */
result = BLT_Stream_GetOutputNode(decoder->stream, &output_node);
if (BLT_SUCCEEDED(result) && output_node) {
BLT_VolumeControl* volume_control = ATX_CAST(output_node, BLT_VolumeControl);
if (volume_control) {
result = BLT_VolumeControl_GetVolume(volume_control, volume);
} else {
result = BLT_ERROR_NOT_SUPPORTED;
}
ATX_RELEASE_OBJECT(output_node);
} else {
result = BLT_ERROR_INVALID_STATE;
}
return result;
}
/*----------------------------------------------------------------------
| BLT_Decoder_OutputChanged
+---------------------------------------------------------------------*/
static void
BLT_Decoder_OutputChanged(BLT_Decoder* decoder, BLT_MediaNode* node)
{
ATX_RELEASE_OBJECT(decoder->output);
if (node) {
decoder->output = ATX_CAST(node, BLT_OutputNode);
if (decoder->output) {
ATX_REFERENCE_OBJECT(decoder->output);
}
} else {
decoder->output = NULL;
}
}
/*----------------------------------------------------------------------
| BLT_Decoder_Drain
+---------------------------------------------------------------------*/
BLT_Result
BLT_Decoder_Drain(BLT_Decoder* decoder)
{
BLT_MediaNode* output_node;
BLT_Result result;
/* drain the output node */
result = BLT_Stream_GetOutputNode(decoder->stream, &output_node);
if (BLT_SUCCEEDED(result) && output_node) {
BLT_OutputNode* output_node_interface = ATX_CAST(output_node, BLT_OutputNode);
if (output_node_interface) {
result = BLT_OutputNode_Drain(output_node_interface);
} else {
result = BLT_SUCCESS;
}
ATX_RELEASE_OBJECT(output_node);
} else {
result = BLT_ERROR_INVALID_STATE;
}
return result;
}
/*----------------------------------------------------------------------
| BLT_Decoder_SetVolume
+---------------------------------------------------------------------*/
BLT_Result
BLT_Decoder_SetVolume(BLT_Decoder* decoder, float volume)
{
BLT_MediaNode* output_node;
BLT_Result result;
/* get the volume from the output node */
result = BLT_Stream_GetOutputNode(decoder->stream, &output_node);
if (BLT_SUCCEEDED(result) && output_node) {
BLT_VolumeControl* volume_control = ATX_CAST(output_node, BLT_VolumeControl);
if (volume_control) {
result = BLT_VolumeControl_SetVolume(volume_control, volume);
} else {
result = BLT_ERROR_NOT_SUPPORTED;
}
ATX_RELEASE_OBJECT(output_node);
} else {
result = BLT_ERROR_INVALID_STATE;
}
return result;
}
/*----------------------------------------------------------------------
| Mp4ParserInput_SetStream
+---------------------------------------------------------------------*/
BLT_METHOD
Mp4ParserInput_SetStream(BLT_InputStreamUser* _self,
ATX_InputStream* stream,
const BLT_MediaType* stream_media_type)
{
Mp4Parser* self = ATX_SELF_M(input, Mp4Parser, BLT_InputStreamUser);
BLT_Result result = BLT_ERROR_INVALID_MEDIA_FORMAT;
/* check media type */
if (stream_media_type == NULL ||
(stream_media_type->id != self->input.audio_media_type.id &&
stream_media_type->id != self->input.video_media_type.id)) {
return BLT_ERROR_INVALID_MEDIA_TYPE;
}
/* if we had a file before, release it now */
delete self->input.mp4_file;
self->input.mp4_file = NULL;
self->input.slow_seek = false;
/* create an adapter for the stream */
AP4_ByteStream* stream_adapter = new ATX_InputStream_To_AP4_ByteStream_Adapter(stream);
/* check if the source can seek quickly or not */
{
ATX_Properties* stream_properties = ATX_CAST(stream, ATX_Properties);
if (stream_properties) {
ATX_PropertyValue property_value;
result = ATX_Properties_GetProperty(stream_properties,
ATX_INPUT_STREAM_PROPERTY_SEEK_SPEED,
&property_value);
if (ATX_SUCCEEDED(result) &&
property_value.type == ATX_PROPERTY_VALUE_TYPE_INTEGER &&
property_value.data.integer <= ATX_INPUT_STREAM_SEEK_SPEED_SLOW) {
AP4_ByteStream* buffered = new AP4_BufferedInputStream(*stream_adapter);
ATX_LOG_FINE("using no-seek mode, source is slow");
stream_adapter->Release();
stream_adapter = buffered;
self->input.slow_seek = true;
}
}
}
/* parse the MP4 file */
ATX_LOG_FINE("parsing MP4 file");
self->input.mp4_file = new AP4_File(*stream_adapter,
AP4_DefaultAtomFactory::Instance,
true); /* parse until moov only */
stream_adapter->Release();
// get the global file info
AP4_Movie* movie = self->input.mp4_file->GetMovie();
if (movie == NULL) {
ATX_LOG_FINE("no movie in file");
goto fail;
}
// update the stream info
BLT_StreamInfo stream_info;
stream_info.type = BLT_STREAM_TYPE_MULTIPLEXED;
stream_info.id = 0;
stream_info.duration = movie->GetDurationMs();
stream_info.mask = BLT_STREAM_INFO_MASK_TYPE |
BLT_STREAM_INFO_MASK_ID |
BLT_STREAM_INFO_MASK_DURATION;
BLT_Stream_SetInfo(ATX_BASE(self, BLT_BaseMediaNode).context, &stream_info);
// create a linear reader if the source is slow-seeking
if (self->input.slow_seek) {
self->input.reader = new AP4_LinearReader(*movie);
}
// setup the tracks
result = Mp4Parser_SetupAudioOutput(self, movie);
if (BLT_FAILED(result)) goto fail;
result = Mp4Parser_SetupVideoOutput(self, movie);
if (BLT_FAILED(result)) goto fail;
// check that we have at least one media track
if (self->audio_output.track == NULL &&
self->video_output.track == NULL) {
ATX_LOG_FINE("no media track found");
goto fail;
}
return BLT_SUCCESS;
fail:
delete self->input.mp4_file;
self->input.mp4_file = NULL;
self->audio_output.track = NULL;
self->video_output.track = NULL;
return result;
}