[FFmpeg-soc] [soc]: r5021 - als/alsdec.c

[thilo.borgmann]

Author: thilo.borgmann
Date: Mon Aug 10 02:41:26 2009
New Revision: 5021

Log:
Added reconstruction of normal signal after joint-stereo prediction.

Modified:
   als/alsdec.c

Modified: als/alsdec.c
==============================================================================
--- als/alsdec.c	Mon Aug 10 02:12:50 2009	(r5020)
+++ als/alsdec.c	Mon Aug 10 02:41:26 2009	(r5021)
@@ -631,6 +631,20 @@ static int read_block_data(ALSDecContext
 
                 raw_samples[smp] = res[smp] - (y >> 20);
             }
+
+            // reconstruct normal signal (joint-stereo)
+            if (*js_blocks & 1 && raw_other) {
+                int i;
+                if (raw_other > raw_samples) {          // L = R - D
+                    for (i = -1; i >= -sconf->max_order; i--) {
+                        raw_samples[i] = raw_other[i] - raw_samples[i];
+                    }
+                } else {                                // R = D + L
+                    for (i = -1; i >= -sconf->max_order; i--) {
+                        raw_samples[i] = raw_samples[i] + raw_other[i];
+                    }
+                }
+            }
         }
     }