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 )
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 );
+
+ // Duplicate channels as necessary
+ if ( channels_avail < *channels )
+ {
+ int size = *channels * *samples * 2;
+ int16_t *new_buffer = mlt_pool_alloc( size );
+
+ mlt_properties_set_data( properties, "audio", new_buffer, size, ( mlt_destructor )mlt_pool_release, NULL );
+
+ // 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;
+ }
+ }
+
+ *buffer = new_buffer;
+ }
- //fprintf( stderr, "resample_get_audio: output_rate %d\n", output_rate );
-
// Return now if now work to do
if ( output_rate == *frequency )
return 0;
+ //fprintf( stderr, "resample_get_audio: input_rate %d output_rate %d\n", *frequency, output_rate );
+
// Convert to floating point
for ( i = 0; i < *samples * *channels; ++i )
input_buffer[ i ] = ( float )( (*buffer)[ i ] ) / 32768;
{
if ( data.output_frames_gen > *samples )
{
- void *release = NULL;
- *buffer = mlt_pool_allocate( data.output_frames_gen * *channels * sizeof( int16_t ), &release );
- mlt_properties_set_data( properties, "audio_release", release, 0, ( mlt_destructor )mlt_pool_release, NULL );
- mlt_properties_set_data( properties, "audio", *buffer, *channels * data.output_frames_gen * 2, NULL, NULL );
+ *buffer = mlt_pool_alloc( data.output_frames_gen * *channels * sizeof( int16_t ) );
+ mlt_properties_set_data( properties, "audio", *buffer, *channels * data.output_frames_gen * 2, mlt_pool_release, NULL );
}
*samples = data.output_frames_gen;
*frequency = output_rate;
mlt_filter filter_resample_init( char *arg )
{
- mlt_filter this = calloc( sizeof( struct mlt_filter_s ), 1 );
- if ( this != NULL && mlt_filter_init( this, NULL ) == 0 )
+ mlt_filter this = mlt_filter_new( );
+ if ( this != NULL )
{
int error;
SRC_STATE *state = src_new( RESAMPLE_TYPE, 2 /* channels */, &error );
if ( error == 0 )
{
- void *input_release = NULL;
- void *input_buffer = mlt_pool_allocate( BUFFER_LEN, &input_release );
- void *output_release = NULL;
- void *output_buffer = mlt_pool_allocate( BUFFER_LEN, &output_release );
+ void *input_buffer = mlt_pool_alloc( BUFFER_LEN );
+ void *output_buffer = mlt_pool_alloc( BUFFER_LEN );
this->process = filter_process;
if ( arg != NULL )
mlt_properties_set_int( mlt_filter_properties( this ), "frequency", atoi( arg ) );
mlt_properties_set_int( mlt_filter_properties( this ), "channels", 2 );
mlt_properties_set_data( mlt_filter_properties( this ), "state", state, 0, (mlt_destructor)src_delete, NULL );
- mlt_properties_set_data( mlt_filter_properties( this ), "input_release", input_release, 0, ( mlt_destructor )mlt_pool_release, NULL );
- mlt_properties_set_data( mlt_filter_properties( this ), "input_buffer", input_buffer, BUFFER_LEN, NULL, NULL );
- mlt_properties_set_data( mlt_filter_properties( this ), "output_release", output_release, 0, ( mlt_destructor )mlt_pool_release, NULL );
- mlt_properties_set_data( mlt_filter_properties( this ), "output_buffer", output_buffer, BUFFER_LEN, NULL, NULL );
+ mlt_properties_set_data( mlt_filter_properties( this ), "input_buffer", input_buffer, BUFFER_LEN, mlt_pool_release, NULL );
+ mlt_properties_set_data( mlt_filter_properties( this ), "output_buffer", output_buffer, BUFFER_LEN, mlt_pool_release, NULL );
}
else
{
}
return this;
}
-