X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fac3tab.c;h=7df3d828fbf2f5a1a77aeb3cb50894911841adf3;hb=b9e2226972737ab202ac1f5a6e005af80072bb39;hp=e7835c6748f830b7ad2ed031ed6aecd44bd2fab2;hpb=306a1204fffc6a4118895a7e90da3d66782c1db9;p=ffmpeg

diff --git a/libavcodec/ac3tab.c b/libavcodec/ac3tab.c
index e7835c6748f..7df3d828fbf 100644
--- a/libavcodec/ac3tab.c
+++ b/libavcodec/ac3tab.c
@@ -2,28 +2,29 @@
  * AC-3 tables
  * copyright (c) 2001 Fabrice Bellard
  *
- * This file is part of FFmpeg.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 /**
- * @file libavcodec/ac3tab.c
+ * @file
  * tables taken directly from the AC-3 spec.
  */
 
+#include "libavutil/audioconvert.h"
 #include "avcodec.h"
 #include "ac3tab.h"
 
@@ -73,7 +74,7 @@ const uint16_t ff_ac3_frame_size_tab[38][3] = {
 };
 
 /**
- * Maps audio coding mode (acmod) to number of full-bandwidth channels.
+ * Map audio coding mode (acmod) to number of full-bandwidth channels.
  * from ATSC A/52 Table 5.8 Audio Coding Mode
  */
 const uint8_t ff_ac3_channels_tab[8] = {
@@ -81,17 +82,17 @@ const uint8_t ff_ac3_channels_tab[8] = {
 };
 
 /**
- * Maps audio coding mode (acmod) to channel layout mask.
+ * Map audio coding mode (acmod) to channel layout mask.
  */
 const uint16_t ff_ac3_channel_layout_tab[8] = {
-    CH_LAYOUT_STEREO,
-    CH_LAYOUT_MONO,
-    CH_LAYOUT_STEREO,
-    CH_LAYOUT_SURROUND,
-    CH_LAYOUT_2_1,
-    CH_LAYOUT_4POINT0,
-    CH_LAYOUT_2_2,
-    CH_LAYOUT_5POINT0
+    AV_CH_LAYOUT_STEREO,
+    AV_CH_LAYOUT_MONO,
+    AV_CH_LAYOUT_STEREO,
+    AV_CH_LAYOUT_SURROUND,
+    AV_CH_LAYOUT_2_1,
+    AV_CH_LAYOUT_4POINT0,
+    AV_CH_LAYOUT_2_2,
+    AV_CH_LAYOUT_5POINT0
 };
 
 #define COMMON_CHANNEL_MAP \
@@ -131,10 +132,23 @@ const uint16_t ff_ac3_bitrate_tab[19] = {
     160, 192, 224, 256, 320, 384, 448, 512, 576, 640
 };
 
+/**
+ * Table of bin locations for rematrixing bands
+ * reference: Section 7.5.2 Rematrixing : Frequency Band Definitions
+ */
+const uint8_t ff_ac3_rematrix_band_tab[5] = { 13, 25, 37, 61, 253 };
+
+/**
+ * Table E2.16 Default Coupling Banding Structure
+ */
+const uint8_t ff_eac3_default_cpl_band_struct[18] = {
+    0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1
+};
+
 /* AC-3 MDCT window */
 
 /* MDCT window */
-const int16_t ff_ac3_window[256] = {
+DECLARE_ALIGNED(16, const int16_t, ff_ac3_window)[AC3_WINDOW_SIZE/2] = {
     4,    7,   12,   16,   21,   28,   34,   42,
    51,   61,   72,   84,   97,  111,  127,  145,
   164,  184,  207,  231,  257,  285,  315,  347,
@@ -198,7 +212,7 @@ const uint8_t ff_ac3_log_add_tab[260]= {
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 };
 
-const uint16_t ff_ac3_hearing_threshold_tab[50][3]= {
+const uint16_t ff_ac3_hearing_threshold_tab[AC3_CRITICAL_BANDS][3]= {
 { 0x04d0,0x04f0,0x0580 },
 { 0x04d0,0x04f0,0x0580 },
 { 0x0440,0x0460,0x04b0 },
@@ -285,11 +299,6 @@ const uint16_t ff_ac3_fast_gain_tab[8]= {
     0x080, 0x100, 0x180, 0x200, 0x280, 0x300, 0x380, 0x400,
 };
 
-const uint8_t ff_ac3_critical_band_size_tab[50]={
-    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3,
-    3, 6, 6, 6, 6, 6, 6, 12, 12, 12, 12, 24, 24, 24, 24, 24
-};
 /**
  * Default channel map for a dependent substream defined by acmod
  */