X-Git-Url: http://research.m1stereo.tv/gitweb?a=blobdiff_plain;f=src%2Fmodules%2Fresample%2Ffilter_resample.c;h=2c848a8520b1273244399ca5ee2025c03d4ab038;hb=4d699147e17dc4edbc002ca26ba62c409cecb4b6;hp=b8da7605d04672ffa1e639bb2e8f140a6c503bbd;hpb=6e4f3aabfeae526318998c1078213de269ea2e65;p=melted

diff --git a/src/modules/resample/filter_resample.c b/src/modules/resample/filter_resample.c
index b8da760..2c848a8 100644
--- a/src/modules/resample/filter_resample.c
+++ b/src/modules/resample/filter_resample.c
@@ -43,6 +43,7 @@ static int resample_get_audio( mlt_frame frame, int16_t **buffer, mlt_audio_form
 	SRC_DATA data;
 	float *input_buffer = mlt_properties_get_data( properties, "resample.input_buffer", NULL );
 	float *output_buffer = mlt_properties_get_data( properties, "resample.output_buffer", NULL );
+	int channels_avail = *channels;
 	int i;
 
 	if ( output_rate == 0 )
@@ -52,9 +53,50 @@ static int resample_get_audio( mlt_frame frame, int16_t **buffer, mlt_audio_form
 	frame->get_audio = mlt_properties_get_data( properties, "resample.get_audio", NULL );
 
 	// Get the producer's audio
-	mlt_frame_get_audio( frame, buffer, format, frequency, channels, samples );
+	mlt_frame_get_audio( frame, buffer, format, frequency, &channels_avail, samples );
 
-	// Return now if now work to do
+	// Duplicate channels as necessary
+	if ( channels_avail < *channels )
+	{
+		int size = *channels * *samples * sizeof( int16_t );
+		int16_t *new_buffer = mlt_pool_alloc( size );
+		
+		// Duplicate the existing channels
+		for ( i = 0; i < *samples; i++ )
+		{
+			int j, k = 0;
+			for ( j = 0; j < *channels; j++ )
+			{
+				new_buffer[ ( i * *channels ) + j ] = (*buffer)[ ( i * channels_avail ) + k ];
+				k = ( k + 1 ) % channels_avail;
+			}
+		}
+		
+		// Update the audio buffer now - destroys the old
+		mlt_properties_set_data( properties, "audio", new_buffer, size, ( mlt_destructor )mlt_pool_release, NULL );
+		
+		*buffer = new_buffer;
+	}
+	else if ( channels_avail > *channels )
+	{
+		// Nasty hack for ac3 5.1 audio - may be a cause of failure?
+		int size = *channels * *samples * sizeof( int16_t );
+		int16_t *new_buffer = mlt_pool_alloc( size );
+		
+		// Drop all but the first *channels
+		for ( i = 0; i < *samples; i++ )
+		{
+			new_buffer[ ( i * *channels ) + 0 ] = (*buffer)[ ( i * channels_avail ) + 2 ];
+			new_buffer[ ( i * *channels ) + 1 ] = (*buffer)[ ( i * channels_avail ) + 3 ];
+		}
+
+		// Update the audio buffer now - destroys the old
+		mlt_properties_set_data( properties, "audio", new_buffer, size, ( mlt_destructor )mlt_pool_release, NULL );
+		
+		*buffer = new_buffer;
+	}
+
+	// Return now if no work to do
 	if ( output_rate == *frequency )
 		return 0;
 
@@ -107,24 +149,27 @@ static int resample_get_audio( mlt_frame frame, int16_t **buffer, mlt_audio_form
 
 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
 {
-	mlt_properties properties = mlt_filter_properties( this );
-	mlt_properties frame_props = mlt_frame_properties( frame );
-
-	// Propogate the frequency property if supplied
-	if ( mlt_properties_get( properties, "frequency" ) != NULL )
-		mlt_properties_set_int( frame_props, "resample.frequency", mlt_properties_get_int( properties, "frequency" ) );
-
-	// Propogate the other properties
-	mlt_properties_set_int( frame_props, "resample.channels", mlt_properties_get_int( properties, "channels" ) );
-	mlt_properties_set_data( frame_props, "resample.state", mlt_properties_get_data( properties, "state", NULL ), 0, NULL, NULL );
-	mlt_properties_set_data( frame_props, "resample.input_buffer", mlt_properties_get_data( properties, "input_buffer", NULL ), 0, NULL, NULL );
-	mlt_properties_set_data( frame_props, "resample.output_buffer", mlt_properties_get_data( properties, "output_buffer", NULL ), 0, NULL, NULL );
+	if ( frame->get_audio != NULL )
+	{
+		mlt_properties properties = mlt_filter_properties( this );
+		mlt_properties frame_props = mlt_frame_properties( frame );
+
+		// Propogate the frequency property if supplied
+		if ( mlt_properties_get( properties, "frequency" ) != NULL )
+			mlt_properties_set_int( frame_props, "resample.frequency", mlt_properties_get_int( properties, "frequency" ) );
+
+		// Propogate the other properties
+		mlt_properties_set_int( frame_props, "resample.channels", mlt_properties_get_int( properties, "channels" ) );
+		mlt_properties_set_data( frame_props, "resample.state", mlt_properties_get_data( properties, "state", NULL ), 0, NULL, NULL );
+		mlt_properties_set_data( frame_props, "resample.input_buffer", mlt_properties_get_data( properties, "input_buffer", NULL ), 0, NULL, NULL );
+		mlt_properties_set_data( frame_props, "resample.output_buffer", mlt_properties_get_data( properties, "output_buffer", NULL ), 0, NULL, NULL );
 	
-	// Backup the original get_audio (it's still needed)
-	mlt_properties_set_data( frame_props, "resample.get_audio", frame->get_audio, 0, NULL, NULL );
+		// Backup the original get_audio (it's still needed)
+		mlt_properties_set_data( frame_props, "resample.get_audio", frame->get_audio, 0, NULL, NULL );
 
-	// Override the get_audio method
-	frame->get_audio = resample_get_audio;
+		// Override the get_audio method
+		frame->get_audio = resample_get_audio;
+	}
 
 	return frame;
 }
@@ -158,4 +203,3 @@ mlt_filter filter_resample_init( char *arg )
 	}
 	return this;
 }
-