diff options
Diffstat (limited to 'libavcodec/g723_1.h')
| -rw-r--r-- | libavcodec/g723_1.h | 59 |
1 files changed, 39 insertions, 20 deletions
diff --git a/libavcodec/g723_1.h b/libavcodec/g723_1.h index 166d897996..40d6e700b1 100644 --- a/libavcodec/g723_1.h +++ b/libavcodec/g723_1.h @@ -3,20 +3,20 @@ * 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 */ @@ -142,7 +142,8 @@ typedef struct g723_1_context { int sid_gain; int cur_gain; int reflection_coef; - int pf_gain; + int pf_gain; ///< formant postfilter + ///< gain scaling unit memory int postfilter; int16_t audio[FRAME_LEN + LPC_ORDER + PITCH_MAX + 4]; @@ -215,16 +216,27 @@ void ff_g723_1_lsp_interpolate(int16_t *lpc, int16_t *cur_lsp, void ff_g723_1_inverse_quant(int16_t *cur_lsp, int16_t *prev_lsp, uint8_t *lsp_index, int bad_frame); - 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 }; +/** + * 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 */ @@ -296,7 +308,9 @@ static const int16_t cos_tab[COS_TBL_SIZE + 1] = { 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}, @@ -606,12 +620,12 @@ 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, @@ -700,10 +714,14 @@ 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] = { @@ -1356,15 +1374,16 @@ 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 */ |