From: Mashiat Sarker Shakkhar <shahriman_ams@yahoo.com>
Date: Fri, 23 Dec 2011 07:21:33 +0000 (+0600)
Subject: Perform dequantization of channel coefficients
X-Git-Tag: android-x86-4.4-r1~13333^2~15
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=70dd5a603cb9d1e7ba00640afa2da52ce5fabf3e;p=android-x86%2Fexternal-ffmpeg.git

Perform dequantization of channel coefficients
---

diff --git a/libavcodec/wmalosslessdec.c b/libavcodec/wmalosslessdec.c
index 67aa655d82..e520ad3f58 100644
--- a/libavcodec/wmalosslessdec.c
+++ b/libavcodec/wmalosslessdec.c
@@ -1052,10 +1052,11 @@ static int decode_subframe(WmallDecodeCtx *s)
 {
     int offset = s->samples_per_frame;
     int subframe_len = s->samples_per_frame;
-    int i;
+    int i, j;
     int total_samples   = s->samples_per_frame * s->num_channels;
     int rawpcm_tile;
     int padding_zeroes;
+    int quant_stepsize = s->quant_stepsize;
 
     s->subframe_offset = get_bits_count(&s->gb);
 
@@ -1155,7 +1156,6 @@ static int decode_subframe(WmallDecodeCtx *s)
     if(rawpcm_tile) {
 	
 	int bits = s->bits_per_sample - padding_zeroes;
-	int j;
 	dprintf(s->avctx, "RAWPCM %d bits per sample. total %d bits, remain=%d\n", bits,
 		bits * s->num_channels * subframe_len, get_bits_count(&s->gb));
 	for(i = 0; i < s->num_channels; i++) {
@@ -1182,6 +1182,11 @@ static int decode_subframe(WmallDecodeCtx *s)
     if(s->do_ac_filter)
         revert_acfilter(s, subframe_len);
 
+    /* Dequantize */
+    for (i = 0; i < s->num_channels; i++)
+        for (j = 0; j < subframe_len; j++)
+            s->channel_residues[i][j] *= quant_stepsize;
+
     /** handled one subframe */
 
     for (i = 0; i < s->channels_for_cur_subframe; i++) {