-/**
- * @file ac3tab.h
- * tables taken directly from AC3 spec.
+/*
+ * AC-3 tables
+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
+ *
+ * This file is part of Libav.
+ *
+ * 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.
+ *
+ * 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-/* possible frequencies */
-static const uint16_t ac3_freqs[3] = { 48000, 44100, 32000 };
-
-/* possible bitrates */
-static const uint16_t ac3_bitratetab[19] = {
- 32, 40, 48, 56, 64, 80, 96, 112, 128,
- 160, 192, 224, 256, 320, 384, 448, 512, 576, 640
-};
-
-static uint8_t masktab[253];
-
-static const uint8_t latab[260]= {
-0x0040,0x003f,0x003e,0x003d,0x003c,0x003b,0x003a,0x0039,0x0038,0x0037,
-0x0036,0x0035,0x0034,0x0034,0x0033,0x0032,0x0031,0x0030,0x002f,0x002f,
-0x002e,0x002d,0x002c,0x002c,0x002b,0x002a,0x0029,0x0029,0x0028,0x0027,
-0x0026,0x0026,0x0025,0x0024,0x0024,0x0023,0x0023,0x0022,0x0021,0x0021,
-0x0020,0x0020,0x001f,0x001e,0x001e,0x001d,0x001d,0x001c,0x001c,0x001b,
-0x001b,0x001a,0x001a,0x0019,0x0019,0x0018,0x0018,0x0017,0x0017,0x0016,
-0x0016,0x0015,0x0015,0x0015,0x0014,0x0014,0x0013,0x0013,0x0013,0x0012,
-0x0012,0x0012,0x0011,0x0011,0x0011,0x0010,0x0010,0x0010,0x000f,0x000f,
-0x000f,0x000e,0x000e,0x000e,0x000d,0x000d,0x000d,0x000d,0x000c,0x000c,
-0x000c,0x000c,0x000b,0x000b,0x000b,0x000b,0x000a,0x000a,0x000a,0x000a,
-0x000a,0x0009,0x0009,0x0009,0x0009,0x0009,0x0008,0x0008,0x0008,0x0008,
-0x0008,0x0008,0x0007,0x0007,0x0007,0x0007,0x0007,0x0007,0x0006,0x0006,
-0x0006,0x0006,0x0006,0x0006,0x0006,0x0006,0x0005,0x0005,0x0005,0x0005,
-0x0005,0x0005,0x0005,0x0005,0x0004,0x0004,0x0004,0x0004,0x0004,0x0004,
-0x0004,0x0004,0x0004,0x0004,0x0004,0x0003,0x0003,0x0003,0x0003,0x0003,
-0x0003,0x0003,0x0003,0x0003,0x0003,0x0003,0x0003,0x0003,0x0003,0x0002,
-0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,
-0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0001,0x0001,
-0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,
-0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,
-0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,
-0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
-0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
-0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
-0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
-0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
-};
-
-static const uint16_t hth[50][3]= {
-{ 0x04d0,0x04f0,0x0580 },
-{ 0x04d0,0x04f0,0x0580 },
-{ 0x0440,0x0460,0x04b0 },
-{ 0x0400,0x0410,0x0450 },
-{ 0x03e0,0x03e0,0x0420 },
-{ 0x03c0,0x03d0,0x03f0 },
-{ 0x03b0,0x03c0,0x03e0 },
-{ 0x03b0,0x03b0,0x03d0 },
-{ 0x03a0,0x03b0,0x03c0 },
-{ 0x03a0,0x03a0,0x03b0 },
-{ 0x03a0,0x03a0,0x03b0 },
-{ 0x03a0,0x03a0,0x03b0 },
-{ 0x03a0,0x03a0,0x03a0 },
-{ 0x0390,0x03a0,0x03a0 },
-{ 0x0390,0x0390,0x03a0 },
-{ 0x0390,0x0390,0x03a0 },
-{ 0x0380,0x0390,0x03a0 },
-{ 0x0380,0x0380,0x03a0 },
-{ 0x0370,0x0380,0x03a0 },
-{ 0x0370,0x0380,0x03a0 },
-{ 0x0360,0x0370,0x0390 },
-{ 0x0360,0x0370,0x0390 },
-{ 0x0350,0x0360,0x0390 },
-{ 0x0350,0x0360,0x0390 },
-{ 0x0340,0x0350,0x0380 },
-{ 0x0340,0x0350,0x0380 },
-{ 0x0330,0x0340,0x0380 },
-{ 0x0320,0x0340,0x0370 },
-{ 0x0310,0x0320,0x0360 },
-{ 0x0300,0x0310,0x0350 },
-{ 0x02f0,0x0300,0x0340 },
-{ 0x02f0,0x02f0,0x0330 },
-{ 0x02f0,0x02f0,0x0320 },
-{ 0x02f0,0x02f0,0x0310 },
-{ 0x0300,0x02f0,0x0300 },
-{ 0x0310,0x0300,0x02f0 },
-{ 0x0340,0x0320,0x02f0 },
-{ 0x0390,0x0350,0x02f0 },
-{ 0x03e0,0x0390,0x0300 },
-{ 0x0420,0x03e0,0x0310 },
-{ 0x0460,0x0420,0x0330 },
-{ 0x0490,0x0450,0x0350 },
-{ 0x04a0,0x04a0,0x03c0 },
-{ 0x0460,0x0490,0x0410 },
-{ 0x0440,0x0460,0x0470 },
-{ 0x0440,0x0440,0x04a0 },
-{ 0x0520,0x0480,0x0460 },
-{ 0x0800,0x0630,0x0440 },
-{ 0x0840,0x0840,0x0450 },
-{ 0x0840,0x0840,0x04e0 },
-};
-
-static const uint8_t baptab[64]= {
- 0, 1, 1, 1, 1, 1, 2, 2, 3, 3,
- 3, 4, 4, 5, 5, 6, 6, 6, 6, 7,
- 7, 7, 7, 8, 8, 8, 8, 9, 9, 9,
- 9, 10, 10, 10, 10, 11, 11, 11, 11, 12,
- 12, 12, 12, 13, 13, 13, 13, 14, 14, 14,
- 14, 14, 14, 14, 14, 15, 15, 15, 15, 15,
- 15, 15, 15, 15,
-};
-
-static const uint8_t sdecaytab[4]={
- 0x0f, 0x11, 0x13, 0x15,
-};
-
-static const uint8_t fdecaytab[4]={
- 0x3f, 0x53, 0x67, 0x7b,
-};
-
-static const uint16_t sgaintab[4]= {
- 0x540, 0x4d8, 0x478, 0x410,
-};
-
-static const uint16_t dbkneetab[4]= {
- 0x000, 0x700, 0x900, 0xb00,
-};
-
-static const uint16_t floortab[8]= {
- 0x2f0, 0x2b0, 0x270, 0x230, 0x1f0, 0x170, 0x0f0, 0xf800,
-};
-
-static const uint16_t fgaintab[8]= {
- 0x080, 0x100, 0x180, 0x200, 0x280, 0x300, 0x380, 0x400,
-};
-
-static const uint8_t bndsz[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
+#ifndef AVCODEC_AC3TAB_H
+#define AVCODEC_AC3TAB_H
+
+#include <stdint.h>
+
+#include "libavutil/internal.h"
+#include "ac3.h"
+
+#if CONFIG_HARDCODED_TABLES
+# define HCONST const
+#else
+# define HCONST
+#endif
+
+extern const uint16_t ff_ac3_frame_size_tab[38][3];
+extern const uint8_t ff_ac3_channels_tab[8];
+extern av_export const uint16_t avpriv_ac3_channel_layout_tab[8];
+extern const uint8_t ff_ac3_enc_channel_map[8][2][6];
+extern const uint8_t ff_ac3_dec_channel_map[8][2][6];
+extern const uint16_t ff_ac3_sample_rate_tab[3];
+extern const uint16_t ff_ac3_bitrate_tab[19];
+extern const uint8_t ff_ac3_rematrix_band_tab[5];
+extern const uint8_t ff_eac3_default_cpl_band_struct[18];
+extern const int16_t ff_ac3_window[AC3_WINDOW_SIZE/2];
+extern const uint8_t ff_ac3_log_add_tab[260];
+extern const uint16_t ff_ac3_hearing_threshold_tab[AC3_CRITICAL_BANDS][3];
+extern const uint8_t ff_ac3_bap_tab[64];
+extern const uint8_t ff_ac3_slow_decay_tab[4];
+extern const uint8_t ff_ac3_fast_decay_tab[4];
+extern const uint16_t ff_ac3_slow_gain_tab[4];
+extern const uint16_t ff_ac3_db_per_bit_tab[4];
+extern const int16_t ff_ac3_floor_tab[8];
+extern const uint16_t ff_ac3_fast_gain_tab[8];
+extern const uint16_t ff_eac3_default_chmap[8];
+extern const uint8_t ff_ac3_band_start_tab[AC3_CRITICAL_BANDS+1];
+extern HCONST uint8_t ff_ac3_bin_to_band_tab[253];
+
+/** Custom channel map locations bitmask
+ * Other channels described in documentation:
+ * Lc/Rc pair, Lrs/Rrs pair, Ts, Lsd/Rsd pair,
+ * Lw/Rw pair, Lvh/Rvh pair, Cvh, Reserved, LFE2
+ */
+enum CustomChannelMapLocation{
+ AC3_CHMAP_L= 1<<(15-0),
+ AC3_CHMAP_C= 1<<(15-1),
+ AC3_CHMAP_R= 1<<(15-2),
+ AC3_CHMAP_L_SUR= 1<<(15-3),
+ AC3_CHMAP_R_SUR = 1<<(15-4),
+ AC3_CHMAP_C_SUR= 1<<(15-7),
+ AC3_CHMAP_LFE = 1<<(15-15)
};
-static uint8_t bndtab[51];
-
-/* AC3 MDCT window */
-static int16_t ac3_window[256];
-
-/* fft & mdct sin cos tables */
-static int16_t costab[64];
-static int16_t sintab[64];
-static int16_t fft_rev[512];
-static int16_t xcos1[128];
-static int16_t xsin1[128];
+#endif /* AVCODEC_AC3TAB_H */
projects / ffmpeg / blobdiff