From 22e28216336da876e1fd17f380ce42eaf1446769 Mon Sep 17 00:00:00 2001 From: Tim Redfern Date: Mon, 17 Feb 2014 13:36:38 +0000 Subject: chasing indexing error --- ffmpeg/libavcodec/acelp_pitch_delay.c | 189 ---------------------------------- 1 file changed, 189 deletions(-) delete mode 100644 ffmpeg/libavcodec/acelp_pitch_delay.c (limited to 'ffmpeg/libavcodec/acelp_pitch_delay.c') diff --git a/ffmpeg/libavcodec/acelp_pitch_delay.c b/ffmpeg/libavcodec/acelp_pitch_delay.c deleted file mode 100644 index c005c4b..0000000 --- a/ffmpeg/libavcodec/acelp_pitch_delay.c +++ /dev/null @@ -1,189 +0,0 @@ -/* - * gain code, gain pitch and pitch delay decoding - * - * Copyright (c) 2008 Vladimir Voroshilov - * - * This file is part of FFmpeg. - * - * 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. - * - * 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 FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "libavutil/common.h" -#include "libavutil/float_dsp.h" -#include "libavutil/libm.h" -#include "libavutil/mathematics.h" -#include "avcodec.h" -#include "acelp_pitch_delay.h" -#include "celp_math.h" - -int ff_acelp_decode_8bit_to_1st_delay3(int ac_index) -{ - ac_index += 58; - if(ac_index > 254) - ac_index = 3 * ac_index - 510; - return ac_index; -} - -int ff_acelp_decode_4bit_to_2nd_delay3( - int ac_index, - int pitch_delay_min) -{ - if(ac_index < 4) - return 3 * (ac_index + pitch_delay_min); - else if(ac_index < 12) - return 3 * pitch_delay_min + ac_index + 6; - else - return 3 * (ac_index + pitch_delay_min) - 18; -} - -int ff_acelp_decode_5_6_bit_to_2nd_delay3( - int ac_index, - int pitch_delay_min) -{ - return 3 * pitch_delay_min + ac_index - 2; -} - -int ff_acelp_decode_9bit_to_1st_delay6(int ac_index) -{ - if(ac_index < 463) - return ac_index + 105; - else - return 6 * (ac_index - 368); -} -int ff_acelp_decode_6bit_to_2nd_delay6( - int ac_index, - int pitch_delay_min) -{ - return 6 * pitch_delay_min + ac_index - 3; -} - -void ff_acelp_update_past_gain( - int16_t* quant_energy, - int gain_corr_factor, - int log2_ma_pred_order, - int erasure) -{ - int i; - int avg_gain=quant_energy[(1 << log2_ma_pred_order) - 1]; // (5.10) - - for(i=(1 << log2_ma_pred_order) - 1; i>0; i--) - { - avg_gain += quant_energy[i-1]; - quant_energy[i] = quant_energy[i-1]; - } - - if(erasure) - quant_energy[0] = FFMAX(avg_gain >> log2_ma_pred_order, -10240) - 4096; // -10 and -4 in (5.10) - else - quant_energy[0] = (6165 * ((ff_log2_q15(gain_corr_factor) >> 2) - (13 << 13))) >> 13; -} - -int16_t ff_acelp_decode_gain_code( - DSPContext *dsp, - int gain_corr_factor, - const int16_t* fc_v, - int mr_energy, - const int16_t* quant_energy, - const int16_t* ma_prediction_coeff, - int subframe_size, - int ma_pred_order) -{ - int i; - - mr_energy <<= 10; - - for(i=0; iscalarproduct_int16(fc_v, fc_v, subframe_size, 0))) >> 3) & ~0x3ff); - - mr_energy = (5439 * (mr_energy >> 15)) >> 8; // (0.15) = (0.15) * (7.23) - - return bidir_sal( - ((ff_exp2(mr_energy & 0x7fff) + 16) >> 5) * (gain_corr_factor >> 1), - (mr_energy >> 15) - 25 - ); -#else - mr_energy = gain_corr_factor * exp(M_LN10 / (20 << 23) * mr_energy) / - sqrt(dsp->scalarproduct_int16(fc_v, fc_v, subframe_size)); - return mr_energy >> 12; -#endif -} - -float ff_amr_set_fixed_gain(float fixed_gain_factor, float fixed_mean_energy, - float *prediction_error, float energy_mean, - const float *pred_table) -{ - // Equations 66-69: - // ^g_c = ^gamma_gc * 100.05 (predicted dB + mean dB - dB of fixed vector) - // Note 10^(0.05 * -10log(average x2)) = 1/sqrt((average x2)). - float val = fixed_gain_factor * - exp2f(M_LOG2_10 * 0.05 * - (avpriv_scalarproduct_float_c(pred_table, prediction_error, 4) + - energy_mean)) / - sqrtf(fixed_mean_energy); - - // update quantified prediction error energy history - memmove(&prediction_error[0], &prediction_error[1], - 3 * sizeof(prediction_error[0])); - prediction_error[3] = 20.0 * log10f(fixed_gain_factor); - - return val; -} - -void ff_decode_pitch_lag(int *lag_int, int *lag_frac, int pitch_index, - const int prev_lag_int, const int subframe, - int third_as_first, int resolution) -{ - /* Note n * 10923 >> 15 is floor(x/3) for 0 <= n <= 32767 */ - if (subframe == 0 || (subframe == 2 && third_as_first)) { - - if (pitch_index < 197) - pitch_index += 59; - else - pitch_index = 3 * pitch_index - 335; - - } else { - if (resolution == 4) { - int search_range_min = av_clip(prev_lag_int - 5, PITCH_DELAY_MIN, - PITCH_DELAY_MAX - 9); - - // decoding with 4-bit resolution - if (pitch_index < 4) { - // integer only precision for [search_range_min, search_range_min+3] - pitch_index = 3 * (pitch_index + search_range_min) + 1; - } else if (pitch_index < 12) { - // 1/3 fractional precision for [search_range_min+3 1/3, search_range_min+5 2/3] - pitch_index += 3 * search_range_min + 7; - } else { - // integer only precision for [search_range_min+6, search_range_min+9] - pitch_index = 3 * (pitch_index + search_range_min - 6) + 1; - } - } else { - // decoding with 5 or 6 bit resolution, 1/3 fractional precision - pitch_index--; - - if (resolution == 5) { - pitch_index += 3 * av_clip(prev_lag_int - 10, PITCH_DELAY_MIN, - PITCH_DELAY_MAX - 19); - } else - pitch_index += 3 * av_clip(prev_lag_int - 5, PITCH_DELAY_MIN, - PITCH_DELAY_MAX - 9); - } - } - *lag_int = pitch_index * 10923 >> 15; - *lag_frac = pitch_index - 3 * *lag_int - 1; -} -- cgit v1.2.3