framework/mlt_frame.c

[mlt] / src / modules / kino / filehandler.cc

diff --git a/src/modules/kino/filehandler.cc b/src/modules/kino/filehandler.cc
index 67412fda8cbdab34deecc949293d6a1200801934..dc57a300bbba4ede385af57746eb3f1a7a317f08 100644 (file)
--- a/src/modules/kino/filehandler.cc
+++ b/src/modules/kino/filehandler.cc
@@ -19,6 +19,10 @@
 
 #include "config.h"
 
+extern "C" {
+#include <framework/mlt_frame.h>
+}
+
 #include <string>
 #include <iostream>
 #include <sstream>
@@ -895,15 +899,22 @@ int QtHandler::GetFrame( uint8_t *data, int frameNum )
                if ( ! isFullyInitialized )
                        AllocateAudioBuffers();
 
+               // Fetch the frequency of the audio track and calc number of samples needed
                int frequency = quicktime_sample_rate( fd, 0 );
-               int samples = ( int )( frequency / quicktime_frame_rate( fd, 0 ) );
-               for ( int i = 0; i < channels; i++ )
-               {
-                       quicktime_set_audio_position( fd, ( int64_t )( frameNum * samples ), 0 );
-                       quicktime_decode_audio( fd, audioChannelBuffer[ i ], NULL, (long) samples, i );
-               }
+               float fps = ( data[ 3 ] & 0x80 ) ? 25.0f : 29.97f;
+               int samples = mlt_sample_calculator( fps, frequency, frameNum );
+               int64_t seek = mlt_sample_calculator_to_now( fps, frequency, frameNum );
+
+               // Obtain a dv encoder and initialise it with minimal info
                dv_encoder_t *encoder = dv_encoder_new( 0, 0, 0 );
+               encoder->isPAL = ( data[ 3 ] & 0x80 );
                encoder->samples_this_frame = samples;
+
+               // Seek to the calculated position and decode
+               quicktime_set_audio_position( fd, seek, 0 );
+               lqt_decode_audio( fd, audioChannelBuffer, NULL, (long) samples );
+
+               // Encode the audio on the frame and done
                dv_encode_full_audio( encoder, audioChannelBuffer, channels, frequency, data );
                dv_encoder_free( encoder );
        }