X-Git-Url: http://research.m1stereo.tv/gitweb?a=blobdiff_plain;f=src%2Fframework%2Fmlt_frame.c;h=dcd5ec7557960b8aebb51597a0929f9cd50176b7;hb=c95736fd9ee742f5e6db06bbe579f23895f55eba;hp=53472dbfb6537ecdc839033ac9aa3f6e49d5a25b;hpb=cab7cd53c3a4d9c4355751088fec61860dcabbce;p=melted

diff --git a/src/framework/mlt_frame.c b/src/framework/mlt_frame.c
index 53472db..dcd5ec7 100644
--- a/src/framework/mlt_frame.c
+++ b/src/framework/mlt_frame.c
@@ -221,7 +221,7 @@ mlt_deque mlt_frame_service_stack( mlt_frame this )
 	return this->stack_service;
 }
 
-/** [EXPERIMENTAL] Replace image stack with the information provided.
+/** Replace image stack with the information provided.
 
   	This might prove to be unreliable and restrictive - the idea is that a transition
 	which normally uses two images may decide to only use the b frame (ie: in the case
@@ -242,8 +242,7 @@ mlt_deque mlt_frame_service_stack( mlt_frame this )
 
 void mlt_frame_replace_image( mlt_frame this, uint8_t *image, mlt_image_format format, int width, int height )
 {
-	// Herein lies the potential problem for this function - it makes a potentially 
-	// dangerous assumption that all content on the image stack can be removed without a destructor
+	// Remove all items from the stack
 	while( mlt_deque_pop_back( this->stack_image ) ) ;
 
 	// Update the information 
@@ -313,7 +312,7 @@ int mlt_frame_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *for
 
 		mlt_properties_set_int( properties, "width", *width );
 		mlt_properties_set_int( properties, "height", *height );
-		mlt_properties_set_int( properties, "aspect_ratio", 1 );
+		mlt_properties_set_int( properties, "aspect_ratio", 0 );
 
 		switch( *format )
 		{
@@ -359,14 +358,30 @@ int mlt_frame_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *for
 		mlt_properties_set_int( properties, "test_image", 1 );
 	}
 
+	mlt_properties_set_int( properties, "scaled_width", *width );
+	mlt_properties_set_int( properties, "scaled_height", *height );
+
 	return error;
 }
 
 uint8_t *mlt_frame_get_alpha_mask( mlt_frame this )
 {
-	if ( this != NULL && this->get_alpha_mask != NULL )
-		return this->get_alpha_mask( this );
-	return this == NULL ? NULL : mlt_properties_get_data( &this->parent, "alpha", NULL );
+	uint8_t *alpha = NULL;
+	if ( this != NULL )
+	{
+		if ( this->get_alpha_mask != NULL )
+			alpha = this->get_alpha_mask( this );
+		if ( alpha == NULL )
+			alpha = mlt_properties_get_data( &this->parent, "alpha", NULL );
+		if ( alpha == NULL )
+		{
+			int size = mlt_properties_get_int( &this->parent, "scaled_width" ) * mlt_properties_get_int( &this->parent, "scaled_height" );
+			alpha = mlt_pool_alloc( size );
+			memset( alpha, 255, size );
+			mlt_properties_set_data( &this->parent, "alpha", alpha, size, mlt_pool_release, NULL );
+		}
+	}
+	return alpha;
 }
 
 int mlt_frame_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
@@ -956,8 +971,8 @@ int mlt_frame_mix_audio( mlt_frame this, mlt_frame that, float weight_start, flo
 	int i, j;
 	double d = 0, s = 0;
 
-	mlt_frame_get_audio( this, &dest, format, &frequency_dest, &channels_dest, &samples_dest );
 	mlt_frame_get_audio( that, &src, format, &frequency_src, &channels_src, &samples_src );
+	mlt_frame_get_audio( this, &dest, format, &frequency_dest, &channels_dest, &samples_dest );
 
 	int silent = mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "silent_audio" );
 	mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "silent_audio", 0 );
@@ -1050,3 +1065,32 @@ int mlt_sample_calculator( float fps, int frequency, int64_t position )
 
 	return samples;
 }
+
+int64_t mlt_sample_calculator_to_now( float fps, int frequency, int64_t frame )
+{
+	int64_t samples = 0;
+
+	// TODO: Correct rules for NTSC and drop the * 100 hack
+	if ( ( int )( fps * 100 ) == 2997 )
+	{
+		samples = ( ( double )( frame * frequency ) / 30 );
+		switch( frequency )
+		{
+			case 48000:
+				samples += 2 * ( frame / 5 );
+				break;
+			case 44100:
+				samples += frame + ( frame / 2 ) - ( frame / 30 ) + ( frame / 300 );
+				break;
+			case 32000:
+				samples += ( 2 * frame ) - ( frame / 4 ) - ( frame / 29 );
+				break;
+		}
+	}
+	else if ( fps != 0 )
+	{
+		samples = ( ( frame * frequency ) / ( int )fps );
+	}
+
+	return samples;
+}