* tables taken directly from the AC-3 spec.
*/
+#include "libavutil/audioconvert.h"
#include "avcodec.h"
#include "ac3tab.h"
* 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 \
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,
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 },
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
*/