X-Git-Url: http://research.m1stereo.tv/gitweb?a=blobdiff_plain;f=src%2Fframework%2Fmlt_producer.c;h=278d9026957b9455183024663a65c405bbfc11b3;hb=cc8b6005abe30b5f0816b5aa6b87aa6867275228;hp=751e19a9e3066309fd03efd267743c15325a6e97;hpb=9390e8b584f3f717f0a326893c0e37cf187a0a51;p=melted

diff --git a/src/framework/mlt_producer.c b/src/framework/mlt_producer.c
index 751e19a..278d902 100644
--- a/src/framework/mlt_producer.c
+++ b/src/framework/mlt_producer.c
@@ -87,6 +87,28 @@ mlt_properties mlt_producer_properties( mlt_producer this )
 	return mlt_service_properties( &this->parent );
 }
 
+/** Convert frame position to timecode.
+*/
+
+mlt_timecode mlt_producer_time( mlt_producer this, int64_t frame )
+{
+	if ( frame < 0 )
+		return -1;
+	else
+		return ( mlt_timecode )frame / mlt_producer_get_fps( this );
+}
+
+/** Convert timecode to frame position.
+*/
+
+int64_t mlt_producer_frame_position( mlt_producer this, mlt_timecode position )
+{
+	if ( position < 0 )
+		return -1;
+	else
+		return ( int64_t )( floor( position * mlt_producer_get_fps( this ) + 0.5 ) );
+}
+
 /** Seek to a specified time code.
 */
 
@@ -111,13 +133,13 @@ int mlt_producer_seek( mlt_producer this, mlt_timecode timecode )
 /** Seek to a specified absolute frame.
 */
 
-int mlt_producer_seek_frame( mlt_producer this, uint64_t frame )
+int mlt_producer_seek_frame( mlt_producer this, int64_t frame )
 {
 	// Calculate the time code
 	double timecode = ( frame / mlt_producer_get_fps( this ) ) - mlt_producer_get_in( this );
 
 	// If timecode is invalid, then seek on time
-	if ( timecode < 0 )
+	if ( frame < 0 || timecode < 0 )
 	{
 		// Seek to the in point
 		mlt_producer_seek( this, 0 );