mlt_properties_set_int( properties, "height", 576 );
mlt_properties_set_int( properties, "normalised_width", 720 );
mlt_properties_set_int( properties, "normalised_height", 576 );
+ mlt_properties_set_double( properties, "aspect_ratio", 59.0/54.0 );
}
else
{
mlt_properties_set_int( properties, "height", 480 );
mlt_properties_set_int( properties, "normalised_width", 720 );
mlt_properties_set_int( properties, "normalised_height", 480 );
+ mlt_properties_set_double( properties, "aspect_ratio", 10.0/11.0 );
}
- mlt_properties_set_double( properties, "aspect_ratio", 4.0 / 3.0 );
mlt_properties_set_data( properties, "audio", NULL, 0, NULL, NULL );
mlt_properties_set_data( properties, "alpha", NULL, 0, NULL, NULL );
// Construct stacks for frames and methods
- this->stack_get_image = mlt_deque_init( );
- this->stack_frame = mlt_deque_init( );
+ this->stack_image = mlt_deque_init( );
+ this->stack_audio = mlt_deque_init( );
this->stack_service = mlt_deque_init( );
}
mlt_properties mlt_frame_properties( mlt_frame this )
{
- return &this->parent;
+ return this != NULL ? &this->parent : NULL;
}
/** Check if we have a way to derive something other than a test card.
int mlt_frame_is_test_card( mlt_frame this )
{
- return mlt_properties_get_int( mlt_frame_properties( this ), "test_image" );
+ return mlt_deque_count( this->stack_image ) == 0 || mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "test_image" );
}
-/** Check if we have a way to derive something than test audio.
+/** Check if we have a way to derive something other than test audio.
*/
int mlt_frame_is_test_audio( mlt_frame this )
{
- return this->get_audio == NULL || mlt_properties_get_int( mlt_frame_properties( this ), "test_audio" );
+ return mlt_deque_count( this->stack_audio ) == 0 || mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "test_audio" );
}
/** Get the aspect ratio of the frame.
double mlt_frame_get_aspect_ratio( mlt_frame this )
{
- return mlt_properties_get_double( mlt_frame_properties( this ), "aspect_ratio" );
+ return mlt_properties_get_double( MLT_FRAME_PROPERTIES( this ), "aspect_ratio" );
}
/** Set the aspect ratio of the frame.
int mlt_frame_set_aspect_ratio( mlt_frame this, double value )
{
- return mlt_properties_set_double( mlt_frame_properties( this ), "aspect_ratio", value );
+ return mlt_properties_set_double( MLT_FRAME_PROPERTIES( this ), "aspect_ratio", value );
}
/** Get the position of this frame.
mlt_position mlt_frame_get_position( mlt_frame this )
{
- return mlt_properties_get_position( mlt_frame_properties( this ), "_position" );
+ int pos = mlt_properties_get_position( MLT_FRAME_PROPERTIES( this ), "_position" );
+ return pos < 0 ? 0 : pos;
}
/** Set the position of this frame.
int mlt_frame_set_position( mlt_frame this, mlt_position value )
{
- return mlt_properties_set_position( mlt_frame_properties( this ), "_position", value );
+ return mlt_properties_set_position( MLT_FRAME_PROPERTIES( this ), "_position", value );
}
/** Stack a get_image callback.
int mlt_frame_push_get_image( mlt_frame this, mlt_get_image get_image )
{
- return mlt_deque_push_back( this->stack_get_image, get_image );
+ return mlt_deque_push_back( this->stack_image, get_image );
}
/** Pop a get_image callback.
mlt_get_image mlt_frame_pop_get_image( mlt_frame this )
{
- return mlt_deque_pop_back( this->stack_get_image );
+ return mlt_deque_pop_back( this->stack_image );
}
/** Push a frame.
int mlt_frame_push_frame( mlt_frame this, mlt_frame that )
{
- return mlt_deque_push_back( this->stack_frame, that );
+ return mlt_deque_push_back( this->stack_image, that );
}
/** Pop a frame.
mlt_frame mlt_frame_pop_frame( mlt_frame this )
{
- return mlt_deque_pop_back( this->stack_frame );
+ return mlt_deque_pop_back( this->stack_image );
}
/** Push a service.
int mlt_frame_push_service( mlt_frame this, void *that )
{
- return mlt_deque_push_back( this->stack_service, that );
+ return mlt_deque_push_back( this->stack_image, that );
}
/** Pop a service.
void *mlt_frame_pop_service( mlt_frame this )
{
- return mlt_deque_pop_back( this->stack_service );
+ return mlt_deque_pop_back( this->stack_image );
}
+/** Push a service.
+*/
+
+int mlt_frame_push_service_int( mlt_frame this, int that )
+{
+ return mlt_deque_push_back_int( this->stack_image, that );
+}
+
+/** Pop a service.
+*/
+
+int mlt_frame_pop_service_int( mlt_frame this )
+{
+ return mlt_deque_pop_back_int( this->stack_image );
+}
+
+/** Push an audio item on the stack.
+*/
+
+int mlt_frame_push_audio( mlt_frame this, void *that )
+{
+ return mlt_deque_push_back( this->stack_audio, that );
+}
+
+/** Pop an audio item from the stack
+*/
+
+void *mlt_frame_pop_audio( mlt_frame this )
+{
+ return mlt_deque_pop_back( this->stack_audio );
+}
+
+/** Return the service stack
+*/
+
+mlt_deque mlt_frame_service_stack( mlt_frame this )
+{
+ return this->stack_service;
+}
+
+/** 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
+ of a composite where the b frame completely obscures the a frame).
+
+ The image must be writable and the destructor for the image itself must be taken
+ care of on another frame and that frame cannot have a replace applied to it...
+ Further it assumes that no alpha mask is in use.
+
+ For these reasons, it can only be used in a specific situation - when you have
+ multiple tracks each with their own transition and these transitions are applied
+ in a strictly reversed order (ie: highest numbered [lowest track] is processed
+ first).
+
+ More reliable approach - the cases should be detected during the process phase
+ and the upper tracks should simply not be invited to stack...
+*/
+
+void mlt_frame_replace_image( mlt_frame this, uint8_t *image, mlt_image_format format, int width, int height )
+{
+ // Remove all items from the stack
+ while( mlt_deque_pop_back( this->stack_image ) ) ;
+
+ // Update the information
+ mlt_properties_set_data( MLT_FRAME_PROPERTIES( this ), "image", image, 0, NULL, NULL );
+ mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "width", width );
+ mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "height", height );
+ mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "format", format );
+ this->get_alpha_mask = NULL;
+}
+
+/** Get the image associated to the frame.
+*/
+
int mlt_frame_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
{
- mlt_properties properties = mlt_frame_properties( this );
+ mlt_properties properties = MLT_FRAME_PROPERTIES( this );
mlt_get_image get_image = mlt_frame_pop_get_image( this );
mlt_producer producer = mlt_properties_get_data( properties, "test_card_producer", NULL );
+ int error = 0;
+
+ *width = *width >> 1 << 1;
if ( get_image != NULL )
{
- return get_image( this, buffer, format, width, height, writable );
+ mlt_properties_set_int( properties, "image_count", mlt_properties_get_int( properties, "image_count" ) - 1 );
+ mlt_position position = mlt_frame_get_position( this );
+ error = get_image( this, buffer, format, width, height, writable );
+ mlt_frame_set_position( this, position );
}
else if ( mlt_properties_get_data( properties, "image", NULL ) != NULL )
{
else if ( producer != NULL )
{
mlt_frame test_frame = NULL;
- mlt_service_get_frame( mlt_producer_service( producer ), &test_frame, 0 );
+ mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer ), &test_frame, 0 );
if ( test_frame != NULL )
{
- mlt_properties test_properties = mlt_frame_properties( test_frame );
+ mlt_properties test_properties = MLT_FRAME_PROPERTIES( test_frame );
mlt_properties_set_double( test_properties, "consumer_aspect_ratio", mlt_properties_get_double( properties, "consumer_aspect_ratio" ) );
- mlt_properties_set_double( test_properties, "consumer_scale", mlt_properties_get_double( properties, "consumer_scale" ) );
- mlt_properties_set( test_properties, "rescale.interp", "nearest" );
+ mlt_properties_set( test_properties, "rescale.interp", mlt_properties_get( properties, "rescale.interp" ) );
mlt_frame_get_image( test_frame, buffer, format, width, height, writable );
mlt_properties_set_data( properties, "test_card_frame", test_frame, 0, ( mlt_destructor )mlt_frame_close, NULL );
mlt_properties_set_data( properties, "image", *buffer, *width * *height * 2, NULL, NULL );
mlt_properties_set_int( properties, "width", *width );
mlt_properties_set_int( properties, "height", *height );
+ mlt_properties_set_double( properties, "aspect_ratio", mlt_frame_get_aspect_ratio( test_frame ) );
}
else
{
}
else
{
- uint8_t *p;
- uint8_t *q;
+ register uint8_t *p;
+ register uint8_t *q;
int size = 0;
*width = *width == 0 ? 720 : *width;
mlt_properties_set_int( properties, "width", *width );
mlt_properties_set_int( properties, "height", *height );
+ mlt_properties_set_int( properties, "aspect_ratio", 0 );
switch( *format )
{
mlt_properties_set_int( properties, "test_image", 1 );
}
- return 0;
+ 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->get_alpha_mask != NULL )
- return this->get_alpha_mask( this );
- return 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 )
{
- mlt_properties properties = mlt_frame_properties( this );
+ mlt_get_audio get_audio = mlt_frame_pop_audio( this );
+ mlt_properties properties = MLT_FRAME_PROPERTIES( this );
+ int hide = mlt_properties_get_int( properties, "test_audio" );
- if ( this->get_audio != NULL )
+ if ( hide == 0 && get_audio != NULL )
{
- return this->get_audio( this, buffer, format, frequency, channels, samples );
+ mlt_position position = mlt_frame_get_position( this );
+ get_audio( this, buffer, format, frequency, channels, samples );
+ mlt_frame_set_position( this, position );
+ }
+ else if ( mlt_properties_get_data( properties, "audio", NULL ) )
+ {
+ *buffer = mlt_properties_get_data( properties, "audio", NULL );
+ *frequency = mlt_properties_get_int( properties, "audio_frequency" );
+ *channels = mlt_properties_get_int( properties, "audio_channels" );
+ *samples = mlt_properties_get_int( properties, "audio_samples" );
}
else
{
mlt_properties_set_data( properties, "audio", *buffer, size, ( mlt_destructor )mlt_pool_release, NULL );
mlt_properties_set_int( properties, "test_audio", 1 );
}
+
+ mlt_properties_set_int( properties, "audio_frequency", *frequency );
+ mlt_properties_set_int( properties, "audio_channels", *channels );
+ mlt_properties_set_int( properties, "audio_samples", *samples );
+
+ if ( mlt_properties_get( properties, "meta.volume" ) )
+ {
+ double value = mlt_properties_get_double( properties, "meta.volume" );
+ if ( value == 0.0 )
+ {
+ memset( *buffer, 0, *samples * *channels * 2 );
+ mlt_properties_set_double( properties, "meta.volume", 1.0 );
+ }
+ else if ( value != 1.0 )
+ {
+ int total = *samples * *channels;
+ int16_t *p = *buffer;
+ while ( total -- )
+ {
+ *p = *p * value;
+ p ++;
+ }
+ mlt_properties_set_double( properties, "meta.volume", 1.0 );
+ }
+ }
+
return 0;
}
-void mlt_frame_close( mlt_frame this )
+unsigned char *mlt_frame_get_waveform( mlt_frame this, int w, int h )
+{
+ int16_t *pcm = NULL;
+ mlt_properties properties = MLT_FRAME_PROPERTIES( this );
+ mlt_audio_format format = mlt_audio_pcm;
+ int frequency = 32000; // lower frequency available?
+ int channels = 2;
+ double fps = mlt_properties_get_double( properties, "fps" );
+ int samples = mlt_sample_calculator( fps, frequency, mlt_frame_get_position( this ) );
+
+ // Get the pcm data
+ mlt_frame_get_audio( this, &pcm, &format, &frequency, &channels, &samples );
+
+ // Make an 8-bit buffer large enough to hold rendering
+ int size = w * h;
+ unsigned char *bitmap = ( unsigned char* )mlt_pool_alloc( size );
+ if ( bitmap != NULL )
+ memset( bitmap, 0, size );
+ mlt_properties_set_data( properties, "waveform", bitmap, size, ( mlt_destructor )mlt_pool_release, NULL );
+
+ // Render vertical lines
+ int16_t *ubound = pcm + samples * channels;
+ int skip = samples / w - 1;
+ int i, j, k;
+
+ // Iterate sample stream and along x coordinate
+ for ( i = 0; i < w && pcm < ubound; i++ )
+ {
+ // pcm data has channels interleaved
+ for ( j = 0; j < channels; j++ )
+ {
+ // Determine sample's magnitude from 2s complement;
+ int pcm_magnitude = *pcm < 0 ? ~(*pcm) + 1 : *pcm;
+ // The height of a line is the ratio of the magnitude multiplied by
+ // half the vertical resolution
+ int height = ( int )( ( double )( pcm_magnitude ) / 32768 * h / 2 );
+ // Determine the starting y coordinate - left channel above center,
+ // right channel below - currently assumes 2 channels
+ int displacement = ( h / 2 ) - ( 1 - j ) * height;
+ // Position buffer pointer using y coordinate, stride, and x coordinate
+ unsigned char *p = &bitmap[ i + displacement * w ];
+
+ // Draw vertical line
+ for ( k = 0; k < height; k++ )
+ p[ w * k ] = 0xFF;
+
+ pcm++;
+ }
+ pcm += skip * channels;
+ }
+
+ return bitmap;
+}
+
+mlt_producer mlt_frame_get_original_producer( mlt_frame this )
{
if ( this != NULL )
+ return mlt_properties_get_data( MLT_FRAME_PROPERTIES( this ), "_producer", NULL );
+ return NULL;
+}
+
+void mlt_frame_close( mlt_frame this )
+{
+ if ( this != NULL && mlt_properties_dec_ref( MLT_FRAME_PROPERTIES( this ) ) <= 0 )
{
- mlt_deque_close( this->stack_get_image );
- mlt_deque_close( this->stack_frame );
+ mlt_deque_close( this->stack_image );
+ mlt_deque_close( this->stack_audio );
+ while( mlt_deque_peek_back( this->stack_service ) )
+ mlt_service_close( mlt_deque_pop_back( this->stack_service ) );
mlt_deque_close( this->stack_service );
mlt_properties_close( &this->parent );
free( this );
/***** convenience functions *****/
-/* this macro scales rgb into the yuv gamut, y is scaled by 219/255 and uv by 224/255 */
-#define RGB2YUV(r, g, b, y, u, v)\
- y = ((257*r + 504*g + 98*b) >> 10) + 16;\
- u = ((-148*r - 291*g + 439*b) >> 10) + 128;\
- v = ((439*r - 368*g - 71*b) >> 10) + 128;\
- y = y < 16 ? 16 : y;\
- u = u < 16 ? 16 : u;\
- v = v < 16 ? 16 : v;\
- y = y > 235 ? 235 : y;\
- u = u > 240 ? 240 : u;\
- v = v > 240 ? 240 : v
-
-/* this macro assumes the user has already scaled their rgb down into the broadcast limits */
-#define RGB2YUV_UNSCALED(r, g, b, y, u, v)\
- y = (299*r + 587*g + 114*b) >> 10;\
- u = ((-169*r - 331*g + 500*b) >> 10) + 128;\
- v = ((500*r - 419*g - 81*b) >> 10) + 128;\
- y = y < 16 ? 16 : y;\
- u = u < 16 ? 16 : u;\
- v = v < 16 ? 16 : v;\
- y = y > 235 ? 235 : y;\
- u = u > 240 ? 240 : u;\
- v = v > 240 ? 240 : v
-
int mlt_convert_rgb24a_to_yuv422( uint8_t *rgba, int width, int height, int stride, uint8_t *yuv, uint8_t *alpha )
{
int ret = 0;
return ret;
}
+uint8_t *mlt_resize_alpha( uint8_t *input, int owidth, int oheight, int iwidth, int iheight )
+{
+ uint8_t *output = NULL;
+
+ if ( input != NULL && ( iwidth != owidth || iheight != oheight ) && ( owidth > 6 && oheight > 6 ) )
+ {
+ iwidth = iwidth - ( iwidth % 2 );
+ owidth = owidth - ( owidth % 2 );
+
+ output = mlt_pool_alloc( owidth * oheight );
+
+ // Coordinates (0,0 is middle of output)
+ int y;
+
+ // Calculate ranges
+ int out_x_range = owidth / 2;
+ int out_y_range = oheight / 2;
+ int in_x_range = iwidth / 2 < out_x_range ? iwidth / 2 : out_x_range;
+ int in_y_range = iheight / 2 < out_y_range ? iheight / 2 : out_y_range;
+
+ // Output pointers
+ uint8_t *out_line = output;
+ uint8_t *out_ptr = out_line;
+
+ // Calculate a middle and possibly invalid pointer in the input
+ uint8_t *in_middle = input + iwidth * ( iheight / 2 ) + ( iwidth / 2 );
+ int in_line = - in_y_range * iwidth - in_x_range;
+
+ int elements;
+
+ // Fill whole section with black
+ y = out_y_range - ( iheight / 2 );
+ int blank_elements = owidth * y;
+ elements = blank_elements;
+ while ( elements -- )
+ *out_line ++ = 0;
+
+ int active_width = iwidth;
+ int inactive_width = out_x_range - in_x_range;
+ uint8_t *p = NULL;
+ uint8_t *end = NULL;
+
+ // Loop for the entirety of our output height.
+ while ( iheight -- )
+ {
+ // Start at the beginning of the line
+ out_ptr = out_line;
+
+ // Fill the outer part with black
+ elements = inactive_width;
+ while ( elements -- )
+ *out_ptr ++ = 0;
+
+ // We're in the input range for this row.
+ p = in_middle + in_line;
+ end = out_ptr + active_width;
+ while ( out_ptr != end )
+ *out_ptr ++ = *p ++;
+
+ // Fill the outer part with black
+ elements = inactive_width;
+ while ( elements -- )
+ *out_ptr ++ = 0;
+
+ // Move to next input line
+ in_line += iwidth;
+
+ // Move to next output line
+ out_line += owidth;
+ }
+
+ // Fill whole section with black
+ elements = blank_elements;
+ while ( elements -- )
+ *out_line ++ = 0;
+ }
+
+ return output;
+}
+
void mlt_resize_yuv422( uint8_t *output, int owidth, int oheight, uint8_t *input, int iwidth, int iheight )
{
// Calculate strides
int istride = iwidth * 2;
int ostride = owidth * 2;
- iwidth = iwidth - ( iwidth % 4 );
- owidth = owidth - ( owidth % 4 );
- iheight = iheight - ( iheight % 2 );
- oheight = oheight - ( oheight % 2 );
-
+ iwidth = iwidth - ( iwidth % 2 );
+ owidth = owidth - ( owidth % 2 );
+ //iheight = iheight - ( iheight % 2 );
+ //oheight = oheight - ( oheight % 2 );
+
// Optimisation point
- if ( iwidth == owidth && iheight == oheight )
+ if ( output == NULL || input == NULL || ( owidth <= 6 || oheight <= 6 || iwidth <= 6 || oheight <= 6 ) )
+ {
+ return;
+ }
+ else if ( iwidth == owidth && iheight == oheight )
+ {
memcpy( output, input, iheight * istride );
+ return;
+ }
// Coordinates (0,0 is middle of output)
int y;
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;
+ uint8_t *in_middle = input + istride * ( iheight / 2 ) + iwidth;
int in_line = - in_y_range * istride - in_x_range * 2;
int elements;
}
int active_width = 2 * iwidth;
- int inactive_width = out_x_range - in_x_range;
+ int left_inactive_width = out_x_range - in_x_range;
+ int right_inactive_width = left_inactive_width;
+ uint8_t *p = NULL;
+ uint8_t *end = NULL;
+
+ if ( in_line % 4 )
+ {
+ active_width -= 2;
+ in_middle += 2;
+ right_inactive_width += 2;
+ }
// Loop for the entirety of our output height.
while ( iheight -- )
out_ptr = out_line;
// Fill the outer part with black
- elements = inactive_width;
+ elements = left_inactive_width;
while ( elements -- )
{
*out_ptr ++ = 16;
}
// We're in the input range for this row.
- memcpy( out_ptr, in_middle + in_line, active_width );
- out_ptr += active_width;
+ p = in_middle + in_line;
+ end = out_ptr + active_width;
+ while ( out_ptr != end )
+ {
+ *out_ptr ++ = *p ++;
+ *out_ptr ++ = *p ++;
+ }
// Fill the outer part with black
- elements = inactive_width;
+ elements = right_inactive_width;
while ( elements -- )
{
*out_ptr ++ = 16;
uint8_t *mlt_frame_resize_yuv422( mlt_frame this, int owidth, int oheight )
{
// Get properties
- mlt_properties properties = mlt_frame_properties( this );
+ mlt_properties properties = MLT_FRAME_PROPERTIES( this );
// Get the input image, width and height
uint8_t *input = mlt_properties_get_data( properties, "image", NULL );
+ uint8_t *alpha = mlt_frame_get_alpha_mask( this );
+
int iwidth = mlt_properties_get_int( properties, "width" );
int iheight = mlt_properties_get_int( properties, "height" );
mlt_properties_set_int( properties, "width", owidth );
mlt_properties_set_int( properties, "height", oheight );
+ // We should resize the alpha too
+ alpha = mlt_resize_alpha( alpha, owidth, oheight, iwidth, iheight );
+ if ( alpha != NULL )
+ {
+ mlt_properties_set_data( properties, "alpha", alpha, owidth * ( oheight + 1 ), ( mlt_destructor )mlt_pool_release, NULL );
+ this->get_alpha_mask = NULL;
+ }
+
// Return the output
return output;
}
uint8_t *mlt_frame_rescale_yuv422( mlt_frame this, int owidth, int oheight )
{
// Get properties
- mlt_properties properties = mlt_frame_properties( this );
+ mlt_properties properties = MLT_FRAME_PROPERTIES( this );
// Get the input image, width and height
uint8_t *input = mlt_properties_get_data( properties, "image", NULL );
int i, j;
double d = 0, s = 0;
- mlt_frame_get_audio( this, &dest, format, &frequency_dest, &channels_dest, &samples_dest );
- //fprintf( stderr, "mix: frame dest samples %d channels %d position %lld\n", samples_dest, channels_dest, mlt_properties_get_position( mlt_frame_properties( this ), "_position" ) );
mlt_frame_get_audio( that, &src, format, &frequency_src, &channels_src, &samples_src );
- //fprintf( stderr, "mix: frame src samples %d channels %d\n", samples_src, channels_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 );
+ if ( silent )
+ memset( dest, 0, samples_dest * channels_dest * sizeof( int16_t ) );
+
+ silent = mlt_properties_get_int( MLT_FRAME_PROPERTIES( that ), "silent_audio" );
+ mlt_properties_set_int( MLT_FRAME_PROPERTIES( that ), "silent_audio", 0 );
+ if ( silent )
+ memset( src, 0, samples_src * channels_src * sizeof( int16_t ) );
+
if ( channels_src > 6 )
channels_src = 0;
if ( channels_dest > 6 )
return ret;
}
+/* Will this break when mlt_position is converted to double? -Zach */
int mlt_sample_calculator( float fps, int frequency, int64_t position )
{
int samples = 0;
- if ( fps > 29 && fps <= 30 )
+ if ( ( int )( fps * 100 ) == 2997 )
{
samples = frequency / 30;
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;
+}