[FFmpeg-cvslog] r26172 - trunk/libavcodec/ac3enc.c

[jbr]

Author: jbr
Date: Thu Dec 30 23:13:37 2010
New Revision: 26172

Log:
Add a window field to AC3MDCTContext and use it as an input to apply_window()
instead of using the ff_ac3_window[] table directly.

Modified:
   trunk/libavcodec/ac3enc.c

Modified: trunk/libavcodec/ac3enc.c
==============================================================================
--- trunk/libavcodec/ac3enc.c	Thu Dec 30 23:13:34 2010	(r26171)
+++ trunk/libavcodec/ac3enc.c	Thu Dec 30 23:13:37 2010	(r26172)
@@ -56,6 +56,7 @@ typedef struct IComplex {
 } IComplex;
 
 typedef struct AC3MDCTContext {
+    const int16_t *window;                  ///< MDCT window function
     int nbits;                              ///< log2(transform size)
     int16_t *costab;                        ///< FFT cos table
     int16_t *sintab;                        ///< FFT sin table
@@ -262,6 +263,8 @@ static av_cold int mdct_init(AVCodecCont
     if (ret)
         return ret;
 
+    mdct->window = ff_ac3_window;
+
     FF_ALLOC_OR_GOTO(avctx, mdct->xcos1,    n4 * sizeof(*mdct->xcos1),    mdct_alloc_fail);
     FF_ALLOC_OR_GOTO(avctx, mdct->xsin1,    n4 * sizeof(*mdct->xsin1),    mdct_alloc_fail);
     FF_ALLOC_OR_GOTO(avctx, mdct->rot_tmp,  n  * sizeof(*mdct->rot_tmp),  mdct_alloc_fail);
@@ -498,7 +501,7 @@ static void apply_mdct(AC3EncodeContext 
             AC3Block *block = &s->blocks[blk];
             const int16_t *input_samples = &s->planar_samples[ch][blk * AC3_BLOCK_SIZE];
 
-            apply_window(s->windowed_samples, input_samples, ff_ac3_window, AC3_WINDOW_SIZE);
+            apply_window(s->windowed_samples, input_samples, s->mdct.window, AC3_WINDOW_SIZE);
 
             block->exp_shift[ch] = normalize_samples(s);