diff options
Diffstat (limited to 'libavcodec/g723_1_data.h')
| -rw-r--r-- | libavcodec/g723_1_data.h | 171 |
1 files changed, 150 insertions, 21 deletions
diff --git a/libavcodec/g723_1_data.h b/libavcodec/g723_1_data.h index 04f8a06..db7f6e4 100644 --- a/libavcodec/g723_1_data.h +++ b/libavcodec/g723_1_data.h @@ -1,28 +1,28 @@ /* - * G.723.1 compatible decoder data tables. + * G723.1 compatible decoder data tables. * Copyright (c) 2006 Benjamin Larsson * Copyright (c) 2010 Mohamed Naufal Basheer * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * FFmpeg 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, + * FFmpeg 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 + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file - * G.723.1 compatible decoder data tables + * G723.1 compatible decoder data tables */ #ifndef AVCODEC_G723_1_DATA_H @@ -33,6 +33,8 @@ #define SUBFRAMES 4 #define SUBFRAME_LEN 60 #define FRAME_LEN (SUBFRAME_LEN << 2) +#define HALF_FRAME_LEN (FRAME_LEN / 2) +#define LPC_FRAME (HALF_FRAME_LEN + SUBFRAME_LEN) #define LPC_ORDER 10 #define LSP_BANDS 3 #define LSP_CB_SIZE 256 @@ -44,19 +46,89 @@ #define GAIN_LEVELS 24 #define COS_TBL_SIZE 512 +/** + * G723.1 frame types + */ +typedef enum FrameType { + ACTIVE_FRAME, ///< Active speech + SID_FRAME, ///< Silence Insertion Descriptor frame + UNTRANSMITTED_FRAME +} FrameType; + static const uint8_t frame_size[4] = { 24, 20, 4, 1 }; -/* Postfilter gain weighting factors scaled by 2^15 */ -static const int16_t ppf_gain_weight[2] = { 0x1800, 0x2000 }; +typedef enum Rate { + RATE_6300, + RATE_5300 +} Rate; + +/** + * G723.1 unpacked data subframe + */ +typedef struct G723_1_Subframe { + int ad_cb_lag; ///< adaptive codebook lag + int ad_cb_gain; + int dirac_train; + int pulse_sign; + int grid_index; + int amp_index; + int pulse_pos; +} G723_1_Subframe; + +/** + * Pitch postfilter parameters + */ +typedef struct PPFParam { + int index; ///< postfilter backward/forward lag + int16_t opt_gain; ///< optimal gain + int16_t sc_gain; ///< scaling gain +} PPFParam; + +/** + * Harmonic filter parameters + */ +typedef struct HFParam { + int index; + int gain; +} HFParam; + +/** + * Optimized fixed codebook excitation parameters + */ +typedef struct FCBParam { + int min_err; + int amp_index; + int grid_index; + int dirac_train; + int pulse_pos[PULSE_MAX]; + int pulse_sign[PULSE_MAX]; +} FCBParam; + +/** + * Postfilter gain weighting factors scaled by 2^15 + */ +static const int16_t ppf_gain_weight[2] = {0x1800, 0x2000}; -/* LSP DC component */ +/** + * LSP DC component + */ static const int16_t dc_lsp[LPC_ORDER] = { - 0x0c3b, 0x1271, 0x1e0a, 0x2a36, 0x3630, - 0x406f, 0x4d28, 0x56f4, 0x638c, 0x6c46 + 0x0c3b, + 0x1271, + 0x1e0a, + 0x2a36, + 0x3630, + 0x406f, + 0x4d28, + 0x56f4, + 0x638c, + 0x6c46 }; -/* Cosine table scaled by 2^14 */ -static const int16_t cos_tab[COS_TBL_SIZE] = { +/** + * Cosine table scaled by 2^14 + */ +static const int16_t cos_tab[COS_TBL_SIZE+1] = { 16384, 16383, 16379, 16373, 16364, 16353, 16340, 16324, 16305, 16284, 16261, 16235, 16207, 16176, 16143, 16107, 16069, 16029, 15986, 15941, 15893, 15843, 15791, 15736, @@ -121,9 +193,12 @@ static const int16_t cos_tab[COS_TBL_SIZE] = { 15679, 15736, 15791, 15843, 15893, 15941, 15986, 16029, 16069, 16107, 16143, 16176, 16207, 16235, 16261, 16284, 16305, 16324, 16340, 16353, 16364, 16373, 16379, 16383, + 16384 }; -/* LSP VQ tables */ +/** + * LSP VQ tables + */ static const int16_t lsp_band0[LSP_CB_SIZE][3] = { { 0, 0, 0}, { -270, -1372, -1032}, { -541, -1650, -1382}, { -723, -2011, -2213}, { -941, -1122, -1942}, { -780, -1145, -2454}, @@ -433,12 +508,12 @@ static const int16_t lsp_band2[LSP_CB_SIZE][4] = { { 3633, 2336, 2408, 1453}, { 2923, 3517, 2567, 1318}, }; -/* +/** * Used for the coding/decoding of the pulses positions * for the MP-MLQ codebook */ static const int32_t combinatorial_table[PULSE_MAX][SUBFRAME_LEN/GRID_SIZE] = { - {118755, 98280, 80730, 65780L, 53130, + {118755, 98280, 80730, 65780, 53130, 42504, 33649, 26334, 20349, 15504, 11628, 8568, 6188, 4368, 3003, 2002, 1287, 792, 462, 252, @@ -527,10 +602,14 @@ static const int16_t pitch_contrib[340] = { -2, 25144, 0, 17998 }; -/* Number of non-zero pulses in the MP-MLQ excitation */ +/** + * Number of non-zero pulses in the MP-MLQ excitation + */ static const int8_t pulses[4] = {6, 5, 6, 5}; -/* Size of the MP-MLQ fixed excitation codebooks */ +/** + * Size of the MP-MLQ fixed excitation codebooks + */ static const int32_t max_pos[4] = {593775, 142506, 593775, 142506}; static const int16_t fixed_cb_gain[GAIN_LEVELS] = { @@ -1183,12 +1262,62 @@ static const int16_t adaptive_cb_gain170[170 * 20] = { -4534, -2487, -3932, -4166, -2113, -3341, -3540, -3070 }; -/* 0.65^i (Zero part) and 0.75^i (Pole part) scaled by 2^15 */ +/** + * 0.65^i (Zero part) and 0.75^i (Pole part) scaled by 2^15 + */ static const int16_t postfilter_tbl[2][LPC_ORDER] = { /* Zero */ - { 21299, 13844, 8999, 5849, 3802, 2471, 1606, 1044, 679, 441 }, + {21299, 13844, 8999, 5849, 3802, 2471, 1606, 1044, 679, 441}, /* Pole */ - { 24576, 18432, 13824, 10368, 7776, 5832, 4374, 3281, 2460, 1845 } + {24576, 18432, 13824, 10368, 7776, 5832, 4374, 3281, 2460, 1845} +}; + +/** + * Hamming window coefficients scaled by 2^15 + */ +static const int16_t hamming_window[LPC_FRAME] = { + 2621, 2631, 2659, 2705, 2770, 2853, 2955, 3074, 3212, 3367, + 3541, 3731, 3939, 4164, 4405, 4663, 4937, 5226, 5531, 5851, + 6186, 6534, 6897, 7273, 7661, 8062, 8475, 8899, 9334, 9780, + 10235, 10699, 11172, 11653, 12141, 12636, 13138, 13645, 14157, 14673, + 15193, 15716, 16242, 16769, 17298, 17827, 18356, 18884, 19411, 19935, + 20457, 20975, 21489, 21999, 22503, 23002, 23494, 23978, 24455, 24924, + 25384, 25834, 26274, 26704, 27122, 27529, 27924, 28306, 28675, 29031, + 29373, 29700, 30012, 30310, 30592, 30857, 31107, 31340, 31557, 31756, + 31938, 32102, 32249, 32377, 32488, 32580, 32654, 32710, 32747, 32766, + 32766, 32747, 32710, 32654, 32580, 32488, 32377, 32249, 32102, 31938, + 31756, 31557, 31340, 31107, 30857, 30592, 30310, 30012, 29700, 29373, + 29031, 28675, 28306, 27924, 27529, 27122, 26704, 26274, 25834, 25384, + 24924, 24455, 23978, 23494, 23002, 22503, 21999, 21489, 20975, 20457, + 19935, 19411, 18884, 18356, 17827, 17298, 16769, 16242, 15716, 15193, + 14673, 14157, 13645, 13138, 12636, 12141, 11653, 11172, 10699, 10235, + 9780, 9334, 8899, 8475, 8062, 7661, 7273, 6897, 6534, 6186, + 5851, 5531, 5226, 4937, 4663, 4405, 4164, 3939, 3731, 3541, + 3367, 3212, 3074, 2955, 2853, 2770, 2705, 2659, 2631, 2621 +}; + +/** + * Binomial window coefficients scaled by 2^15 + */ +static const int16_t binomial_window[LPC_ORDER] = { + 32749, 32695, 32604, 32477, 32315, 32118, 31887, 31622, 31324, 30995 +}; + +/** + * 0.994^i scaled by 2^15 + */ +static const int16_t bandwidth_expand[LPC_ORDER] = { + 32571, 32376, 32182, 31989, 31797, 31606, 31416, 31228, 31040, 30854 +}; + +/** + * 0.5^i scaled by 2^15 + */ +static const int16_t percept_flt_tbl[2][LPC_ORDER] = { + /* Zero part */ + {29491, 26542, 23888, 21499, 19349, 17414, 15673, 14106, 12695, 11425}, + /* Pole part */ + {16384, 8192, 4096, 2048, 1024, 512, 256, 128, 64, 32} }; static const int cng_adaptive_cb_lag[4] = { 1, 0, 1, 3 }; |
