#include "config.h"
#include "mlt_multitrack.h"
+#include "mlt_playlist.h"
#include "mlt_frame.h"
#include <stdio.h>
mlt_producer producer = &this->parent;
if ( mlt_producer_init( producer, this ) == 0 )
{
+ mlt_properties properties = mlt_multitrack_properties( this );
producer->get_frame = producer_get_frame;
+ mlt_properties_set_data( properties, "multitrack", this, 0, NULL, NULL );
+ mlt_properties_set( properties, "log_id", "multitrack" );
+ mlt_properties_set( properties, "resource", "<multitrack>" );
}
else
{
return mlt_service_properties( mlt_multitrack_service( this ) );
}
-/** Initialise timecode related information.
+/** Initialise position related information.
*/
-static void mlt_multitrack_refresh( mlt_multitrack this )
+void mlt_multitrack_refresh( mlt_multitrack this )
{
int i = 0;
mlt_properties properties = mlt_multitrack_properties( this );
// We need to ensure that the multitrack reports the longest track as its length
- mlt_timecode length = 0;
+ mlt_position length = 0;
// We need to ensure that fps are the same on all services
double fps = 0;
// If it's allocated then, update our stats
if ( producer != NULL )
{
+ // If we have more than 1 track, we must be in continue mode
+ if ( this->count > 1 )
+ mlt_properties_set( mlt_producer_properties( producer ), "eof", "continue" );
+
// Determine the longest length
- length = mlt_producer_get_length( producer ) > length ? mlt_producer_get_length( producer ) : length;
+ length = mlt_producer_get_playtime( producer ) > length ? mlt_producer_get_playtime( producer ) : length;
// Handle fps
if ( fps == 0 )
}
// Update multitrack properties now - we'll not destroy the in point here
- mlt_properties_set_timecode( properties, "length", length );
- mlt_properties_set_timecode( properties, "out", length );
- mlt_properties_set_timecode( properties, "playtime", length - mlt_properties_get_timecode( properties, "in" ) );
+ mlt_properties_set_position( properties, "length", length );
+ mlt_properties_set_position( properties, "out", length - 1 );
+ mlt_properties_set_double( properties, "fps", fps );
}
/** Connect a producer to a given track.
+
+ Note that any producer can be connected here, but see special case treatment
+ of playlist in clip point determination below.
*/
int mlt_multitrack_connect( mlt_multitrack this, mlt_producer producer, int track )
return result;
}
+/** Get the number of tracks.
+*/
+
+int mlt_multitrack_count( mlt_multitrack this )
+{
+ return this->count;
+}
+
+/** Get an individual track as a producer.
+*/
+
+mlt_producer mlt_multitrack_track( mlt_multitrack this, int track )
+{
+ mlt_producer producer = NULL;
+
+ if ( this->list != NULL && track < this->count )
+ producer = this->list[ track ];
+
+ return producer;
+}
+
+static int position_compare( const void *p1, const void *p2 )
+{
+ return *( int64_t * )p1 - *( int64_t * )p2;
+}
+
+static int add_unique( mlt_position *array, int size, mlt_position position )
+{
+ int i = 0;
+ for ( i = 0; i < size; i ++ )
+ if ( array[ i ] == position )
+ break;
+ if ( i == size )
+ array[ size ++ ] = position;
+ return size;
+}
+
+/** Determine the clip point.
+
+ Special case here: a 'producer' has no concept of multiple clips - only the
+ playlist and multitrack producers have clip functionality. Further to that a
+ multitrack determines clip information from any connected tracks that happen
+ to be playlists.
+
+ Additionally, it must locate clips in the correct order, for example, consider
+ the following track arrangement:
+
+ playlist1 |0.0 |b0.0 |0.1 |0.1 |0.2 |
+ playlist2 |b1.0 |1.0 |b1.1 |1.1 |
+
+ Note - b clips represent blanks. They are also reported as clip positions.
+
+ When extracting clip positions from these playlists, we should get a sequence of:
+
+ 0.0, 1.0, b0.0, 0.1, b1.1, 1.1, 0.1, 0.2, [out of playlist2], [out of playlist1]
+*/
+
+mlt_position mlt_multitrack_clip( mlt_multitrack this, mlt_whence whence, int index )
+{
+ mlt_position position = 0;
+ int i = 0;
+ int j = 0;
+ int64_t *map = malloc( 1000 * sizeof( mlt_position ) );
+ int count = 0;
+
+ for ( i = 0; i < this->count; i ++ )
+ {
+ // Get the producer for this track
+ mlt_producer producer = this->list[ i ];
+
+ // If it's assigned...
+ if ( producer != NULL )
+ {
+ // Get the properties of this producer
+ mlt_properties properties = mlt_producer_properties( producer );
+
+ // Determine if it's a playlist
+ mlt_playlist playlist = mlt_properties_get_data( properties, "playlist", NULL );
+
+ // Special case consideration of playlists
+ if ( playlist != NULL )
+ {
+ for ( j = 0; j < mlt_playlist_count( playlist ); j ++ )
+ count = add_unique( map, count, mlt_playlist_clip( playlist, mlt_whence_relative_start, j ) );
+ count = add_unique( map, count, mlt_producer_get_out( producer ) + 1 );
+ }
+ else
+ {
+ count = add_unique( map, count, 0 );
+ count = add_unique( map, count, mlt_producer_get_out( producer ) + 1 );
+ }
+ }
+ }
+
+ // Now sort the map
+ qsort( map, count, sizeof( int64_t ), position_compare );
+
+ // Now locate the requested index
+ switch( whence )
+ {
+ case mlt_whence_relative_start:
+ if ( index < count )
+ position = map[ index ];
+ else
+ position = map[ count - 1 ];
+ break;
+
+ case mlt_whence_relative_current:
+ position = mlt_producer_position( mlt_multitrack_producer( this ) );
+ for ( i = 0; i < count - 2; i ++ )
+ if ( position >= map[ i ] && position < map[ i + 1 ] )
+ break;
+ index += i;
+ if ( index >= 0 && index < count )
+ position = map[ index ];
+ else if ( index < 0 )
+ position = map[ 0 ];
+ else
+ position = map[ count - 1 ];
+ break;
+
+ case mlt_whence_relative_end:
+ if ( index < count )
+ position = map[ count - index - 1 ];
+ else
+ position = map[ 0 ];
+ break;
+ }
+
+ // Free the map
+ free( map );
+
+ return position;
+}
+
/** Get frame method.
Special case here: The multitrack must be used in a conjunction with a downstream
// Get the producer for this track
mlt_producer producer = this->list[ index ];
- // Obtain the current timecode
- uint64_t position = mlt_producer_frame( parent );
+ // Obtain the current position
+ mlt_position position = mlt_producer_frame( parent );
// Make sure we're at the same point
- mlt_producer_seek_frame( producer, position );
+ mlt_producer_seek( producer, position );
// Get the frame from the producer
mlt_service_get_frame( mlt_producer_service( producer ), frame, 0 );
+
+ // Indicate speed of this producer
+ mlt_properties producer_properties = mlt_producer_properties( parent );
+ double speed = mlt_properties_get_double( producer_properties, "_speed" );
+ mlt_properties properties = mlt_frame_properties( *frame );
+ mlt_properties_set_double( properties, "_speed", speed );
}
else
{
// Generate a test frame
*frame = mlt_frame_init( );
- // Let tractor know if we've reached the end
- mlt_properties_set_int( mlt_frame_properties( *frame ), "last_track", index >= this->count );
-
- // Update timecode on the frame we're creating
- mlt_frame_set_timecode( *frame, mlt_producer_position( parent ) );
+ // Update position on the frame we're creating
+ mlt_frame_set_position( *frame, mlt_producer_position( parent ) );
// Move on to the next frame
if ( index >= this->count )
+ {
+ // Let tractor know if we've reached the end
+ mlt_properties_set_int( mlt_frame_properties( *frame ), "last_track", 1 );
+
+ // Move to the next frame
mlt_producer_prepare_next( parent );
+ }
+
+ // Refresh our stats
+ mlt_multitrack_refresh( this );
}
return 0;
projects / melted / blobdiff