X-Git-Url: http://research.m1stereo.tv/gitweb?a=blobdiff_plain;f=src%2Fframework%2Fmlt_frame.c;h=1c36cf0d66f3df84d3a810e88d6bb54494eff10c;hb=6336039a203c6496691784682f9ad56eb13abcc3;hp=69c717bf2c740e07d9b73a7b47e025d9b3f6d8aa;hpb=7da5daf600f8b97781d85a137c3aa81effb7e610;p=melted

diff --git a/src/framework/mlt_frame.c b/src/framework/mlt_frame.c
index 69c717b..1c36cf0 100644
--- a/src/framework/mlt_frame.c
+++ b/src/framework/mlt_frame.c
@@ -53,7 +53,7 @@ mlt_frame mlt_frame_init( )
 		mlt_properties_init( properties, this );
 
 		// Set default properties on the frame
-		mlt_properties_set_timecode( properties, "timecode", 0.0 );
+		mlt_properties_set_position( properties, "position", 0.0 );
 		mlt_properties_set_data( properties, "image", NULL, 0, NULL, NULL );
 		mlt_properties_set_int( properties, "width", 720 );
 		mlt_properties_set_int( properties, "height", 576 );
@@ -77,7 +77,15 @@ mlt_properties mlt_frame_properties( mlt_frame this )
 
 int mlt_frame_is_test_card( mlt_frame this )
 {
-	return this->stack_get_image_size == 0;
+	return ( this->stack_get_image_size == 0 && mlt_properties_get_data( mlt_frame_properties( this ), "image", NULL ) == NULL );
+}
+
+/** Check if we have a way to derive something than test audio.
+*/
+
+int mlt_frame_is_test_audio( mlt_frame this )
+{
+	return this->get_audio == NULL;
 }
 
 /** Get the aspect ratio of the frame.
@@ -98,22 +106,22 @@ int mlt_frame_set_aspect_ratio( mlt_frame this, double value )
 	return mlt_properties_set_double( properties, "aspect_ratio", value );
 }
 
-/** Get the timecode of this frame.
+/** Get the position of this frame.
 */
 
-mlt_timecode mlt_frame_get_timecode( mlt_frame this )
+mlt_position mlt_frame_get_position( mlt_frame this )
 {
 	mlt_properties properties = mlt_frame_properties( this );
-	return mlt_properties_get_timecode( properties, "timecode" );
+	return mlt_properties_get_position( properties, "position" );
 }
 
-/** Set the timecode of this frame.
+/** Set the position of this frame.
 */
 
-int mlt_frame_set_timecode( mlt_frame this, mlt_timecode value )
+int mlt_frame_set_position( mlt_frame this, mlt_position value )
 {
 	mlt_properties properties = mlt_frame_properties( this );
-	return mlt_properties_set_timecode( properties, "timecode", value );
+	return mlt_properties_set_position( properties, "position", value );
 }
 
 /** Stack a get_image callback.
@@ -239,17 +247,20 @@ int mlt_frame_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *for
 	}
 	else
 	{
-		if ( test_card.afmt != *format )
+		if ( *samples <= 0 )
+			*samples = 1920;
+		if ( *channels <= 0 )
+			*channels = 2;
+		if ( *frequency <= 0 )
+			*frequency = 48000;
+		if ( test_card.audio == NULL || test_card.afmt != *format )
 		{
 			test_card.afmt = *format;
-			test_card.audio = realloc( test_card.audio, 1920 * 2 * sizeof( int16_t ) );
-			memset( test_card.audio, 0, 1920 * 2 * sizeof( int16_t ) );
+			test_card.audio = realloc( test_card.audio, *samples * *channels * sizeof( int16_t ) );
+			memset( test_card.audio, 0, *samples * *channels * sizeof( int16_t ) );
 		}
 		
 		*buffer = test_card.audio;
-		*frequency = 48000;
-		*channels = 2;
-		*samples = 1920;
 	}
 	return 0;
 }
@@ -394,68 +405,92 @@ int mlt_convert_yuv420p_to_yuv422( uint8_t *yuv420p, int width, int height, int
 int mlt_frame_composite_yuv( mlt_frame this, mlt_frame that, int x, int y, float weight )
 {
 	int ret = 0;
-	int x_start = 0;
-	int width_src, height_src;
-	int width_dest, height_dest;
-	mlt_image_format format_src, format_dest;
+	int width_src = 0, height_src = 0;
+	int width_dest = 0, height_dest = 0;
+	mlt_image_format format_src = mlt_image_yuv422, format_dest = mlt_image_yuv422;
 	uint8_t *p_src, *p_dest;
-	int x_end;
 	int i, j;
 	int stride_src;
 	int stride_dest;
+	int x_src = 0, y_src = 0;
+
+	// optimization point - no work to do
+	if ( ( x < 0 && -x >= width_src ) || ( y < 0 && -y >= height_src ) )
+		return ret;
 
 	format_src = mlt_image_yuv422;
 	format_dest = mlt_image_yuv422;
-	
+
+	//fprintf( stderr, "call get_image on frame a\n"), fflush( stderr );
 	mlt_frame_get_image( this, &p_dest, &format_dest, &width_dest, &height_dest, 1 /* writable */ );
+	//fprintf( stderr, "call get_image on frame b\n"), fflush( stderr );
 	mlt_frame_get_image( that, &p_src, &format_src, &width_src, &height_src, 0 /* writable */ );
-	
-	x_end = width_src;
-	
+
+	//fprintf( stderr, "mlt_frame_composite_yuv %dx%d -> %dx%d\n", width_src, height_src, width_dest, height_dest );
+	//fflush(stderr);
+	//return ret;
 	stride_src = width_src * 2;
 	stride_dest = width_dest * 2;
-	uint8_t *lower = p_dest;
-	uint8_t *upper = p_dest + height_dest * stride_dest;
-
-	p_dest += ( y * stride_dest ) + ( x * 2 );
-
+	
+	// crop overlay off the left edge of frame
 	if ( x < 0 )
 	{
-		x_start = -x;
-		x_end += x_start;
+		x_src = -x;
+		width_src -= x_src;
+		x = 0;
 	}
+	
+	// crop overlay beyond right edge of frame
+	else if ( x + width_src > width_dest )
+		width_src = width_dest - x;
+
+	// crop overlay off the top edge of the frame
+	if ( y < 0 )
+	{
+		y_src = -y;
+		height_src -= y_src;
+	}
+	// crop overlay below bottom edge of frame
+	else if ( y + height_src > height_dest )
+		height_src = height_dest - y;
+
+	// offset pointer into overlay buffer based on cropping
+	p_src += x_src * 2 + y_src * stride_src;
 
-	uint8_t *z = mlt_frame_get_alpha_mask( that );
+	// offset pointer into frame buffer based upon positive, even coordinates only!
+//	if ( interlaced && y % 2 )
+//		++y;
+	p_dest += ( x < 0 ? 0 : x ) * 2 + ( y < 0 ? 0 : y ) * stride_dest;
 
+	// Get the alpha channel of the overlay
+	uint8_t *p_alpha = mlt_frame_get_alpha_mask( that );
+
+	// offset pointer into alpha channel based upon cropping
+	if ( p_alpha )
+		p_alpha += x_src + y_src * stride_src / 2;
+
+	// now do the compositing only to cropped extents
 	for ( i = 0; i < height_src; i++ )
 	{
 		uint8_t *p = p_src;
 		uint8_t *q = p_dest;
 		uint8_t *o = p_dest;
+		uint8_t *z = p_alpha;
 
 		for ( j = 0; j < width_src; j ++ )
 		{
-			if ( q >= lower && q < upper && j >= x_start && j < x_end )
-			{
 				uint8_t y = *p ++;
 				uint8_t uv = *p ++;
 				uint8_t a = ( z == NULL ) ? 255 : *z ++;
 				float value = ( weight * ( float ) a / 255.0 );
 				*o ++ = (uint8_t)( y * value + *q++ * ( 1 - value ) );
 				*o ++ = (uint8_t)( uv * value + *q++ * ( 1 - value ) );
-			}
-			else
-			{
-				p += 2;
-				o += 2;
-				q += 2;
-				if ( z != NULL )
-					z += 1;
-			}
 		}
 
 		p_src += stride_src;
 		p_dest += stride_dest;
+		if ( p_alpha )
+			p_alpha += stride_src / 2;
 	}
 
 	return ret;
@@ -464,8 +499,23 @@ int mlt_frame_composite_yuv( mlt_frame this, mlt_frame that, int x, int y, float
 void *memfill( void *dst, void *src, int l, int elements )
 {
 	int i = 0;
-	for ( i = 0; i < elements; i ++ )
-		dst = memcpy( dst, src, l ) + l;
+	if ( l == 2 )
+	{
+		uint8_t *p = dst;
+		uint8_t *src1 = src;
+		uint8_t *src2 = src + 1;
+		for ( i = 0; i < elements; i ++ )
+		{
+			*p ++ = *src1;
+			*p ++ = *src2;
+		}
+		dst = p;
+	}
+	else
+	{
+		for ( i = 0; i < elements; i ++ )
+			dst = memcpy( dst, src, l ) + l;
+	}
 	return dst;
 }
 
@@ -475,6 +525,11 @@ void mlt_resize_yuv422( uint8_t *output, int owidth, int oheight, uint8_t *input
 	int istride = iwidth * 2;
 	int ostride = owidth * 2;
 
+	iwidth = iwidth - ( iwidth % 4 );
+	owidth = owidth - ( owidth % 4 );
+	iheight = iheight - ( iheight % 2 );
+	oheight = oheight - ( oheight % 2 );
+
    	// Coordinates (0,0 is middle of output)
    	int y;
 
@@ -486,7 +541,7 @@ void mlt_resize_yuv422( uint8_t *output, int owidth, int oheight, uint8_t *input
 
    	// Output pointers
    	uint8_t *out_line = output;
-   	uint8_t *out_ptr;
+   	uint8_t *out_ptr = out_line;
 
    	// Calculate a middle and possibly invalid pointer in the input
    	uint8_t *in_middle = input + istride * ( iheight / 2 ) + ( iwidth / 2 ) * 2;
@@ -506,8 +561,8 @@ void mlt_resize_yuv422( uint8_t *output, int owidth, int oheight, uint8_t *input
 			out_ptr = memfill( out_ptr, black, 2, out_x_range - in_x_range );
 
        		// We're in the input range for this row.
-			memcpy( out_ptr, in_middle + in_line, 4 * in_x_range );
-			out_ptr += 4 * in_x_range;
+			memcpy( out_ptr, in_middle + in_line, 2 * iwidth );
+			out_ptr += 2 * iwidth;
 
 			// Fill the outer part with black
 			out_ptr = memfill( out_ptr, black, 2, out_x_range - in_x_range );
@@ -586,6 +641,8 @@ uint8_t *mlt_frame_rescale_yuv422( mlt_frame this, int owidth, int oheight )
 		int istride = iwidth * 2;
 		int ostride = owidth * 2;
 
+		iwidth = iwidth - ( iwidth % 4 );
+
     	// Coordinates (0,0 is middle of output)
     	int y, x;
 
@@ -633,7 +690,7 @@ uint8_t *mlt_frame_rescale_yuv422( mlt_frame this, int owidth, int oheight )
             	if ( abs( dx ) < in_x_range && abs( dy ) < in_y_range  )
             	{
                 	// We're in the input range for this row.
-					in_ptr = in_line + ( dx >> 1 ) * 4 - 2 * ( x & 1 );
+					in_ptr = in_line + ( dx >> 1 ) * 4 + 2 * ( x & 1 );
                 	*out_ptr ++ = *in_ptr ++;
                 	*out_ptr ++ = *in_ptr ++;
             	}
@@ -662,3 +719,154 @@ uint8_t *mlt_frame_rescale_yuv422( mlt_frame this, int owidth, int oheight )
 	return input;
 }
 
+int mlt_frame_mix_audio( mlt_frame this, mlt_frame that, float weight, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
+{
+	int ret = 0;
+	int16_t *p_src, *p_dest;
+	int16_t *src, *dest;
+	//static int16_t *extra_src = NULL, *extra_dest = NULL;
+	static int extra_src_samples = 0, extra_dest_samples = 0;
+	int frequency_src = 0, frequency_dest = 0;
+	int channels_src = 0, channels_dest = 0;
+	int samples_src = 0, samples_dest = 0;
+	int i, j;
+
+	mlt_frame_get_audio( this, &p_dest, format, &frequency_dest, &channels_dest, &samples_dest );
+	//fprintf( stderr, "frame dest samples %d channels %d position %f\n", samples_dest, channels_dest, mlt_properties_get_position( mlt_frame_properties( this ), "position" ) );
+	mlt_frame_get_audio( that, &p_src, format, &frequency_src, &channels_src, &samples_src );
+	//fprintf( stderr, "frame src  samples %d channels %d\n", samples_src, channels_src );
+	if ( channels_src > 6 )
+		channels_src = 0;
+	if ( channels_dest > 6 )
+		channels_dest = 0;
+	if ( samples_src > 4000 )
+		samples_src = 0;
+	if ( samples_dest > 4000 )
+		samples_dest = 0;
+
+#if 0
+	// Append new samples to leftovers
+	if ( extra_dest_samples > 0 )
+	{
+		fprintf( stderr, "prepending %d samples to dest\n", extra_dest_samples );
+		dest = realloc( extra_dest, ( samples_dest + extra_dest_samples ) * 2 * channels_dest );
+		memcpy( &extra_dest[ extra_dest_samples * channels_dest ], p_dest, samples_dest * 2 * channels_dest );
+	}
+	else
+		dest = p_dest;
+	if ( extra_src_samples > 0 )
+	{
+		fprintf( stderr, "prepending %d samples to src\n", extra_src_samples );
+		src = realloc( extra_src, ( samples_src + extra_src_samples ) * 2 * channels_src );
+		memcpy( &extra_src[ extra_src_samples * channels_src ], p_src, samples_src * 2 * channels_src );
+	}
+	else
+		src = p_src;
+#else
+	src = p_src;
+	dest = p_dest;
+#endif
+
+	// determine number of samples to process	
+	if ( samples_src + extra_src_samples < samples_dest + extra_dest_samples )
+		*samples = samples_src + extra_src_samples;
+	else if ( samples_dest + extra_dest_samples < samples_src + extra_src_samples )
+		*samples = samples_dest + extra_dest_samples;
+	
+	*channels = channels_src < channels_dest ? channels_src : channels_dest;
+	*buffer = p_dest;
+
+	// Mixdown
+	for ( i = 0; i < *samples; i++ )
+	{
+		for ( j = 0; j < *channels; j++ )
+		{
+			double d = (double) dest[ i * channels_dest + j ];
+			double s = (double) src[ i * channels_src + j ];
+			dest[ i * channels_dest + j ] = s * weight + d * ( 1.0 - weight );
+		}
+	}
+
+	// We have to copy --sigh
+	if ( dest != p_dest )
+		memcpy( p_dest, dest, *samples * 2 * *channels );
+
+#if 0
+	// Store the leftovers
+	if ( samples_src + extra_src_samples < samples_dest + extra_dest_samples )
+	{
+		extra_dest_samples = ( samples_dest + extra_dest_samples ) - ( samples_src + extra_src_samples );
+		size_t size = extra_dest_samples * 2 * channels_dest;
+		fprintf( stderr, "storing %d samples from dest\n", extra_dest_samples );
+		if ( extra_dest )
+			free( extra_dest );
+		extra_dest = malloc( size );
+		if ( extra_dest )
+			memcpy( extra_dest, &p_dest[ ( samples_dest - extra_dest_samples - 1 ) * channels_dest ], size );
+		else
+			extra_dest_samples = 0;
+	}
+	else if ( samples_dest + extra_dest_samples < samples_src + extra_src_samples )
+	{
+		extra_src_samples = ( samples_src + extra_src_samples ) - ( samples_dest + extra_dest_samples );
+		size_t size = extra_src_samples * 2 * channels_src;
+		fprintf( stderr, "storing %d samples from src\n", extra_dest_samples );
+		if ( extra_src )
+			free( extra_src );
+		extra_src = malloc( size );
+		if ( extra_src )
+			memcpy( extra_src, &p_src[ ( samples_src - extra_src_samples - 1 ) * channels_src ], size );
+		else
+			extra_src_samples = 0;
+	}
+#endif
+	
+	return ret;
+}
+
+int mlt_sample_calculator( float fps, int frequency, int64_t position )
+{
+	int samples = 0;
+
+	if ( fps > 29 && fps <= 30 )
+	{
+		samples = frequency / 30;
+
+		switch ( frequency )
+		{
+			case 48000:
+				if ( position % 5 != 0 )
+					samples += 2;
+				break;
+			case 44100:
+				if ( position % 300 == 0 )
+					samples = 1471;
+				else if ( position % 30 == 0 )
+					samples = 1470;
+				else if ( position % 2 == 0 )
+					samples = 1472;
+				else
+					samples = 1471;
+				break;
+			case 32000:
+				if ( position % 30 == 0 )
+					samples = 1068;
+				else if ( position % 29 == 0 )
+					samples = 1067;
+				else if ( position % 4 == 2 )
+					samples = 1067;
+				else
+					samples = 1068;
+				break;
+			default:
+				samples = 0;
+		}
+	}
+	else if ( fps != 0 )
+	{
+		samples = frequency / fps;
+	}
+
+	return samples;
+}
+