framework/mlt_frame.c

[melted] / src / framework / mlt_frame.c

diff --git a/src/framework/mlt_frame.c b/src/framework/mlt_frame.c
index 2c67e76..dcd5ec7 100644 (file)
--- a/src/framework/mlt_frame.c
+++ b/src/framework/mlt_frame.c
@@ -1065,3 +1065,32 @@ int mlt_sample_calculator( float fps, int frequency, int64_t position )
 
        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;
+}