1 files changed, 29 insertions, 15 deletions
diff --git a/src/liblame_wrapper.cc b/src/liblame_wrapper.cc
index b29acf9..5603d6f 100644
--- a/src/liblame_wrapper.cc
+++ b/src/liblame_wrapper.cc
@@ -118,27 +118,41 @@ Frame *LibLAMEWrapper::close(Frame *oldframe)
   return frame;
 }
 
+#include <math.h>
+static unsigned int sin_cnt = 0;
 Frame *LibLAMEWrapper::encode(Frame *dvframe)
 {
+  if(dvframe->mute) {
+    // Overwrite audiobuffer with dummy data
+    double volume = 1000; // Min:= 0 - Max := 32000
+    double frequency = 440; // in Hz
+
+    for(int cnt = 0; cnt < SAMPLES; cnt++) {
+      sin_cnt++;
+      double sin_val = (((double)sin_cnt / (double)OUTPUT_SAMPLE_RATE) * (double)M_PI) * frequency;
+      audio_buffer[0][cnt] = audio_buffer[1][cnt] = (short int)(sin(sin_val) * volume);
+    }
 
-  if(!decoder) {
-    decoder = dv_decoder_new(FALSE/*this value is unused*/, FALSE, FALSE);
-    decoder->quality = DV_QUALITY_BEST;
-    
-    dv_parse_header(decoder, dvframe->data);
-  
-    decoder->system = e_dv_system_625_50;  // PAL lines, PAL framerate
-    decoder->sampling = e_dv_sample_422;  // 4 bytes y, 2 bytes u, 2 bytes v
-    decoder->std = e_dv_std_iec_61834;
-    decoder->num_dif_seqs = 12;
+    //    memset(audio_buffer[0], 0, sizeof(audio_buffer[0]));
+    //    memset(audio_buffer[1], 0, sizeof(audio_buffer[1]));
+  } else {
+    // Decode audio from dv frame
+    if(!decoder) {
+      decoder = dv_decoder_new(FALSE/*this value is unused*/, FALSE, FALSE);
+      decoder->quality = DV_QUALITY_BEST;
+      
+      dv_parse_header(decoder, dvframe->data);
+      
+      decoder->system = e_dv_system_625_50;  // PAL lines, PAL framerate
+      decoder->sampling = e_dv_sample_422;  // 4 bytes y, 2 bytes u, 2 bytes v
+      decoder->std = e_dv_std_iec_61834;
+      decoder->num_dif_seqs = 12;
+    }
+    // Decode audio using libdv
+    dv_decode_full_audio( decoder, dvframe->data, audio_buffer );
   }
 
   /**
-   * Decode audio using libdv
-   */
-  dv_decode_full_audio( decoder, dvframe->data, audio_buffer );
-
-  /**
    * input pcm data, output (maybe) mp3 frames.
    * This routine handles all buffering, resampling and filtering for you.
    *