[Ffmpeg-cvslog] r7761 - trunk/ffplay.c

[michael]

Author: michael
Date: Mon Jan 29 23:06:55 2007
New Revision: 7761

Modified:
   trunk/ffplay.c

Log:
trigger for the audio scope vissualization


Modified: trunk/ffplay.c
==============================================================================
--- trunk/ffplay.c	(original)
+++ trunk/ffplay.c	Mon Jan 29 23:06:55 2007
@@ -782,7 +782,23 @@
         delay -= s->width / 2;
         if (delay < s->width)
             delay = s->width;
-        i_start = compute_mod(s->sample_array_index - delay * channels, SAMPLE_ARRAY_SIZE);
+
+        i_start= x = compute_mod(s->sample_array_index - delay * channels, SAMPLE_ARRAY_SIZE);
+
+        h= INT_MIN;
+        for(i=0; i<1000; i+=channels){
+            int idx= (SAMPLE_ARRAY_SIZE + x - i) % SAMPLE_ARRAY_SIZE;
+            int a= s->sample_array[idx];
+            int b= s->sample_array[(idx + 4*channels)%SAMPLE_ARRAY_SIZE];
+            int c= s->sample_array[(idx + 5*channels)%SAMPLE_ARRAY_SIZE];
+            int d= s->sample_array[(idx + 9*channels)%SAMPLE_ARRAY_SIZE];
+            int score= a-d;
+            if(h<score && (b^c)<0){
+                h= score;
+                i_start= idx;
+            }
+        }
+
         s->last_i_start = i_start;
     } else {
         i_start = s->last_i_start;