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/* |
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* SIPR / ACELP.NET decoder |
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* |
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* Copyright (c) 2008 Vladimir Voroshilov |
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* Copyright (c) 2009 Vitor Sessak |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <math.h> |
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#include <stdint.h> |
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#include <string.h> |
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#include "libavutil/channel_layout.h" |
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#include "libavutil/float_dsp.h" |
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#include "libavutil/mathematics.h" |
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#define BITSTREAM_READER_LE |
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#include "avcodec.h" |
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#include "get_bits.h" |
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#include "internal.h" |
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#include "lsp.h" |
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#include "acelp_vectors.h" |
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#include "acelp_pitch_delay.h" |
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#include "acelp_filters.h" |
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#include "celp_filters.h" |
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#define MAX_SUBFRAME_COUNT 5 |
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#include "sipr.h" |
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#include "siprdata.h" |
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typedef struct SiprModeParam { |
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const char *mode_name; |
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uint16_t bits_per_frame; |
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uint8_t subframe_count; |
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uint8_t frames_per_packet; |
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float pitch_sharp_factor; |
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/* bitstream parameters */ |
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uint8_t number_of_fc_indexes; |
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uint8_t ma_predictor_bits; ///< size in bits of the switched MA predictor |
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/** size in bits of the i-th stage vector of quantizer */ |
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uint8_t vq_indexes_bits[5]; |
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/** size in bits of the adaptive-codebook index for every subframe */ |
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uint8_t pitch_delay_bits[5]; |
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uint8_t gp_index_bits; |
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uint8_t fc_index_bits[10]; ///< size in bits of the fixed codebook indexes |
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uint8_t gc_index_bits; ///< size in bits of the gain codebook indexes |
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} SiprModeParam; |
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static const SiprModeParam modes[MODE_COUNT] = { |
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[MODE_16k] = { |
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.mode_name = "16k", |
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.bits_per_frame = 160, |
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.subframe_count = SUBFRAME_COUNT_16k, |
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.frames_per_packet = 1, |
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.pitch_sharp_factor = 0.00, |
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.number_of_fc_indexes = 10, |
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.ma_predictor_bits = 1, |
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.vq_indexes_bits = {7, 8, 7, 7, 7}, |
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.pitch_delay_bits = {9, 6}, |
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.gp_index_bits = 4, |
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.fc_index_bits = {4, 5, 4, 5, 4, 5, 4, 5, 4, 5}, |
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.gc_index_bits = 5 |
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}, |
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[MODE_8k5] = { |
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.mode_name = "8k5", |
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.bits_per_frame = 152, |
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.subframe_count = 3, |
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.frames_per_packet = 1, |
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.pitch_sharp_factor = 0.8, |
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.number_of_fc_indexes = 3, |
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.ma_predictor_bits = 0, |
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.vq_indexes_bits = {6, 7, 7, 7, 5}, |
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.pitch_delay_bits = {8, 5, 5}, |
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.gp_index_bits = 0, |
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.fc_index_bits = {9, 9, 9}, |
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.gc_index_bits = 7 |
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}, |
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[MODE_6k5] = { |
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.mode_name = "6k5", |
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.bits_per_frame = 232, |
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.subframe_count = 3, |
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.frames_per_packet = 2, |
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.pitch_sharp_factor = 0.8, |
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.number_of_fc_indexes = 3, |
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.ma_predictor_bits = 0, |
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.vq_indexes_bits = {6, 7, 7, 7, 5}, |
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.pitch_delay_bits = {8, 5, 5}, |
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.gp_index_bits = 0, |
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.fc_index_bits = {5, 5, 5}, |
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.gc_index_bits = 7 |
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}, |
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[MODE_5k0] = { |
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.mode_name = "5k0", |
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.bits_per_frame = 296, |
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.subframe_count = 5, |
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.frames_per_packet = 2, |
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.pitch_sharp_factor = 0.85, |
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.number_of_fc_indexes = 1, |
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.ma_predictor_bits = 0, |
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.vq_indexes_bits = {6, 7, 7, 7, 5}, |
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.pitch_delay_bits = {8, 5, 8, 5, 5}, |
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.gp_index_bits = 0, |
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.fc_index_bits = {10}, |
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.gc_index_bits = 7 |
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} |
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}; |
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const float ff_pow_0_5[] = { |
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1.0/(1 << 1), 1.0/(1 << 2), 1.0/(1 << 3), 1.0/(1 << 4), |
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1.0/(1 << 5), 1.0/(1 << 6), 1.0/(1 << 7), 1.0/(1 << 8), |
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1.0/(1 << 9), 1.0/(1 << 10), 1.0/(1 << 11), 1.0/(1 << 12), |
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1.0/(1 << 13), 1.0/(1 << 14), 1.0/(1 << 15), 1.0/(1 << 16) |
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}; |
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static void dequant(float *out, const int *idx, const float * const cbs[]) |
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{ |
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int i; |
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5190 |
int stride = 2; |
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int num_vec = 5; |
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✓✓ |
31140 |
for (i = 0; i < num_vec; i++) |
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25950 |
memcpy(out + stride*i, cbs[i] + stride*idx[i], stride*sizeof(float)); |
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5190 |
} |
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static void lsf_decode_fp(float *lsfnew, float *lsf_history, |
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const SiprParameters *parm) |
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{ |
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int i; |
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float lsf_tmp[LP_FILTER_ORDER]; |
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dequant(lsf_tmp, parm->vq_indexes, lsf_codebooks); |
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✓✓ |
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for (i = 0; i < LP_FILTER_ORDER; i++) |
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lsfnew[i] = lsf_history[i] * 0.33 + lsf_tmp[i] + mean_lsf[i]; |
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ff_sort_nearly_sorted_floats(lsfnew, LP_FILTER_ORDER - 1); |
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/* Note that a minimum distance is not enforced between the last value and |
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the previous one, contrary to what is done in ff_acelp_reorder_lsf() */ |
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ff_set_min_dist_lsf(lsfnew, LSFQ_DIFF_MIN, LP_FILTER_ORDER - 1); |
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✗✓ |
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lsfnew[9] = FFMIN(lsfnew[LP_FILTER_ORDER - 1], 1.3 * M_PI); |
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memcpy(lsf_history, lsf_tmp, LP_FILTER_ORDER * sizeof(*lsf_history)); |
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✓✓ |
51900 |
for (i = 0; i < LP_FILTER_ORDER - 1; i++) |
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46710 |
lsfnew[i] = cos(lsfnew[i]); |
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5190 |
lsfnew[LP_FILTER_ORDER - 1] *= 6.153848 / M_PI; |
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} |
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/** Apply pitch lag to the fixed vector (AMR section 6.1.2). */ |
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static void pitch_sharpening(int pitch_lag_int, float beta, |
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float *fixed_vector) |
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{ |
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int i; |
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✓✓ |
88197 |
for (i = pitch_lag_int; i < SUBFR_SIZE; i++) |
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71279 |
fixed_vector[i] += beta * fixed_vector[i - pitch_lag_int]; |
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16918 |
} |
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/** |
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* Extract decoding parameters from the input bitstream. |
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* @param parms parameters structure |
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* @param pgb pointer to initialized GetBitContext structure |
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*/ |
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8441 |
static void decode_parameters(SiprParameters* parms, GetBitContext *pgb, |
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const SiprModeParam *p) |
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{ |
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int i, j; |
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✓✓ |
8441 |
if (p->ma_predictor_bits) |
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3251 |
parms->ma_pred_switch = get_bits(pgb, p->ma_predictor_bits); |
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✓✓ |
50646 |
for (i = 0; i < 5; i++) |
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42205 |
parms->vq_indexes[i] = get_bits(pgb, p->vq_indexes_bits[i]); |
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✓✓ |
31861 |
for (i = 0; i < p->subframe_count; i++) { |
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23420 |
parms->pitch_delay[i] = get_bits(pgb, p->pitch_delay_bits[i]); |
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✓✓ |
23420 |
if (p->gp_index_bits) |
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6502 |
parms->gp_index[i] = get_bits(pgb, p->gp_index_bits); |
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✓✓ |
132454 |
for (j = 0; j < p->number_of_fc_indexes; j++) |
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109034 |
parms->fc_indexes[i][j] = get_bits(pgb, p->fc_index_bits[j]); |
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23420 |
parms->gc_index[i] = get_bits(pgb, p->gc_index_bits); |
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} |
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8441 |
} |
215 |
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216 |
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5190 |
static void sipr_decode_lp(float *lsfnew, const float *lsfold, float *Az, |
217 |
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int num_subfr) |
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{ |
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double lsfint[LP_FILTER_ORDER]; |
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int i,j; |
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5190 |
float t, t0 = 1.0 / num_subfr; |
222 |
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223 |
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5190 |
t = t0 * 0.5; |
224 |
✓✓ |
22108 |
for (i = 0; i < num_subfr; i++) { |
225 |
✓✓ |
186098 |
for (j = 0; j < LP_FILTER_ORDER; j++) |
226 |
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169180 |
lsfint[j] = lsfold[j] * (1 - t) + t * lsfnew[j]; |
227 |
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228 |
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16918 |
ff_amrwb_lsp2lpc(lsfint, Az, LP_FILTER_ORDER); |
229 |
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16918 |
Az += LP_FILTER_ORDER; |
230 |
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16918 |
t += t0; |
231 |
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} |
232 |
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5190 |
} |
233 |
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234 |
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/** |
235 |
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* Evaluate the adaptive impulse response. |
236 |
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*/ |
237 |
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16918 |
static void eval_ir(const float *Az, int pitch_lag, float *freq, |
238 |
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float pitch_sharp_factor) |
239 |
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{ |
240 |
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float tmp1[SUBFR_SIZE+1], tmp2[LP_FILTER_ORDER+1]; |
241 |
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int i; |
242 |
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243 |
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16918 |
tmp1[0] = 1.0; |
244 |
✓✓ |
186098 |
for (i = 0; i < LP_FILTER_ORDER; i++) { |
245 |
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169180 |
tmp1[i+1] = Az[i] * ff_pow_0_55[i]; |
246 |
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169180 |
tmp2[i ] = Az[i] * ff_pow_0_7 [i]; |
247 |
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} |
248 |
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16918 |
memset(tmp1 + 11, 0, 37 * sizeof(float)); |
249 |
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250 |
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16918 |
ff_celp_lp_synthesis_filterf(freq, tmp2, tmp1, SUBFR_SIZE, |
251 |
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LP_FILTER_ORDER); |
252 |
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253 |
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16918 |
pitch_sharpening(pitch_lag, pitch_sharp_factor, freq); |
254 |
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16918 |
} |
255 |
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256 |
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/** |
257 |
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* Evaluate the convolution of a vector with a sparse vector. |
258 |
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*/ |
259 |
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16918 |
static void convolute_with_sparse(float *out, const AMRFixed *pulses, |
260 |
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const float *shape, int length) |
261 |
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{ |
262 |
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int i, j; |
263 |
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264 |
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16918 |
memset(out, 0, length*sizeof(float)); |
265 |
✓✓ |
76642 |
for (i = 0; i < pulses->n; i++) |
266 |
✓✓ |
1639132 |
for (j = pulses->x[i]; j < length; j++) |
267 |
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1579408 |
out[j] += pulses->y[i] * shape[j - pulses->x[i]]; |
268 |
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16918 |
} |
269 |
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270 |
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/** |
271 |
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* Apply postfilter, very similar to AMR one. |
272 |
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*/ |
273 |
|
3370 |
static void postfilter_5k0(SiprContext *ctx, const float *lpc, float *samples) |
274 |
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{ |
275 |
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float buf[SUBFR_SIZE + LP_FILTER_ORDER]; |
276 |
|
3370 |
float *pole_out = buf + LP_FILTER_ORDER; |
277 |
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float lpc_n[LP_FILTER_ORDER]; |
278 |
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float lpc_d[LP_FILTER_ORDER]; |
279 |
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int i; |
280 |
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|
281 |
✓✓ |
37070 |
for (i = 0; i < LP_FILTER_ORDER; i++) { |
282 |
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33700 |
lpc_d[i] = lpc[i] * ff_pow_0_75[i]; |
283 |
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33700 |
lpc_n[i] = lpc[i] * ff_pow_0_5 [i]; |
284 |
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}; |
285 |
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|
286 |
|
3370 |
memcpy(pole_out - LP_FILTER_ORDER, ctx->postfilter_mem, |
287 |
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LP_FILTER_ORDER*sizeof(float)); |
288 |
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289 |
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3370 |
ff_celp_lp_synthesis_filterf(pole_out, lpc_d, samples, SUBFR_SIZE, |
290 |
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LP_FILTER_ORDER); |
291 |
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292 |
|
3370 |
memcpy(ctx->postfilter_mem, pole_out + SUBFR_SIZE - LP_FILTER_ORDER, |
293 |
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LP_FILTER_ORDER*sizeof(float)); |
294 |
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295 |
|
3370 |
ff_tilt_compensation(&ctx->tilt_mem, 0.4, pole_out, SUBFR_SIZE); |
296 |
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297 |
|
3370 |
memcpy(pole_out - LP_FILTER_ORDER, ctx->postfilter_mem5k0, |
298 |
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LP_FILTER_ORDER*sizeof(*pole_out)); |
299 |
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|
300 |
|
3370 |
memcpy(ctx->postfilter_mem5k0, pole_out + SUBFR_SIZE - LP_FILTER_ORDER, |
301 |
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LP_FILTER_ORDER*sizeof(*pole_out)); |
302 |
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303 |
|
3370 |
ff_celp_lp_zero_synthesis_filterf(samples, lpc_n, pole_out, SUBFR_SIZE, |
304 |
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LP_FILTER_ORDER); |
305 |
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306 |
|
3370 |
} |
307 |
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308 |
|
16918 |
static void decode_fixed_sparse(AMRFixed *fixed_sparse, const int16_t *pulses, |
309 |
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SiprMode mode, int low_gain) |
310 |
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{ |
311 |
|
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int i; |
312 |
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|
313 |
✓✓✓ |
16918 |
switch (mode) { |
314 |
|
10086 |
case MODE_6k5: |
315 |
✓✓ |
40344 |
for (i = 0; i < 3; i++) { |
316 |
|
30258 |
fixed_sparse->x[i] = 3 * (pulses[i] & 0xf) + i; |
317 |
✓✓ |
30258 |
fixed_sparse->y[i] = pulses[i] & 0x10 ? -1 : 1; |
318 |
|
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} |
319 |
|
10086 |
fixed_sparse->n = 3; |
320 |
|
10086 |
break; |
321 |
|
3462 |
case MODE_8k5: |
322 |
✓✓ |
13848 |
for (i = 0; i < 3; i++) { |
323 |
|
10386 |
fixed_sparse->x[2*i ] = 3 * ((pulses[i] >> 4) & 0xf) + i; |
324 |
|
10386 |
fixed_sparse->x[2*i + 1] = 3 * ( pulses[i] & 0xf) + i; |
325 |
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|
326 |
✓✓ |
10386 |
fixed_sparse->y[2*i ] = (pulses[i] & 0x100) ? -1.0: 1.0; |
327 |
|
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|
328 |
|
10386 |
fixed_sparse->y[2*i + 1] = |
329 |
|
10386 |
(fixed_sparse->x[2*i + 1] < fixed_sparse->x[2*i]) ? |
330 |
✓✓ |
10386 |
-fixed_sparse->y[2*i ] : fixed_sparse->y[2*i]; |
331 |
|
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} |
332 |
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|
333 |
|
3462 |
fixed_sparse->n = 6; |
334 |
|
3462 |
break; |
335 |
|
3370 |
case MODE_5k0: |
336 |
|
|
default: |
337 |
✓✓ |
3370 |
if (low_gain) { |
338 |
|
1954 |
int offset = (pulses[0] & 0x200) ? 2 : 0; |
339 |
|
1954 |
int val = pulses[0]; |
340 |
|
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|
341 |
✓✓ |
7816 |
for (i = 0; i < 3; i++) { |
342 |
|
5862 |
int index = (val & 0x7) * 6 + 4 - i*2; |
343 |
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|
344 |
✓✓ |
5862 |
fixed_sparse->y[i] = (offset + index) & 0x3 ? -1 : 1; |
345 |
|
5862 |
fixed_sparse->x[i] = index; |
346 |
|
|
|
347 |
|
5862 |
val >>= 3; |
348 |
|
|
} |
349 |
|
1954 |
fixed_sparse->n = 3; |
350 |
|
|
} else { |
351 |
|
1416 |
int pulse_subset = (pulses[0] >> 8) & 1; |
352 |
|
|
|
353 |
|
1416 |
fixed_sparse->x[0] = ((pulses[0] >> 4) & 15) * 3 + pulse_subset; |
354 |
|
1416 |
fixed_sparse->x[1] = ( pulses[0] & 15) * 3 + pulse_subset + 1; |
355 |
|
|
|
356 |
✓✓ |
1416 |
fixed_sparse->y[0] = pulses[0] & 0x200 ? -1 : 1; |
357 |
|
1416 |
fixed_sparse->y[1] = -fixed_sparse->y[0]; |
358 |
|
1416 |
fixed_sparse->n = 2; |
359 |
|
|
} |
360 |
|
3370 |
break; |
361 |
|
|
} |
362 |
|
16918 |
} |
363 |
|
|
|
364 |
|
5190 |
static void decode_frame(SiprContext *ctx, SiprParameters *params, |
365 |
|
|
float *out_data) |
366 |
|
|
{ |
367 |
|
|
int i, j; |
368 |
|
5190 |
int subframe_count = modes[ctx->mode].subframe_count; |
369 |
|
5190 |
int frame_size = subframe_count * SUBFR_SIZE; |
370 |
|
|
float Az[LP_FILTER_ORDER * MAX_SUBFRAME_COUNT]; |
371 |
|
|
float *excitation; |
372 |
|
|
float ir_buf[SUBFR_SIZE + LP_FILTER_ORDER]; |
373 |
|
|
float lsf_new[LP_FILTER_ORDER]; |
374 |
|
5190 |
float *impulse_response = ir_buf + LP_FILTER_ORDER; |
375 |
|
5190 |
float *synth = ctx->synth_buf + 16; // 16 instead of LP_FILTER_ORDER for |
376 |
|
|
// memory alignment |
377 |
|
5190 |
int t0_first = 0; |
378 |
|
|
AMRFixed fixed_cb; |
379 |
|
|
|
380 |
|
5190 |
memset(ir_buf, 0, LP_FILTER_ORDER * sizeof(float)); |
381 |
|
5190 |
lsf_decode_fp(lsf_new, ctx->lsf_history, params); |
382 |
|
|
|
383 |
|
5190 |
sipr_decode_lp(lsf_new, ctx->lsp_history, Az, subframe_count); |
384 |
|
|
|
385 |
|
5190 |
memcpy(ctx->lsp_history, lsf_new, LP_FILTER_ORDER * sizeof(float)); |
386 |
|
|
|
387 |
|
5190 |
excitation = ctx->excitation + PITCH_DELAY_MAX + L_INTERPOL; |
388 |
|
|
|
389 |
✓✓ |
22108 |
for (i = 0; i < subframe_count; i++) { |
390 |
|
16918 |
float *pAz = Az + i*LP_FILTER_ORDER; |
391 |
|
|
float fixed_vector[SUBFR_SIZE]; |
392 |
|
|
int T0,T0_frac; |
393 |
|
|
float pitch_gain, gain_code, avg_energy; |
394 |
|
|
|
395 |
|
16918 |
ff_decode_pitch_lag(&T0, &T0_frac, params->pitch_delay[i], t0_first, i, |
396 |
|
16918 |
ctx->mode == MODE_5k0, 6); |
397 |
|
|
|
398 |
✓✓✓✓ ✓✓ |
16918 |
if (i == 0 || (i == 2 && ctx->mode == MODE_5k0)) |
399 |
|
5864 |
t0_first = T0; |
400 |
|
|
|
401 |
|
16918 |
ff_acelp_interpolatef(excitation, excitation - T0 + (T0_frac <= 0), |
402 |
|
|
ff_b60_sinc, 6, |
403 |
✓✓ |
16918 |
2 * ((2 + T0_frac)%3 + 1), LP_FILTER_ORDER, |
404 |
|
|
SUBFR_SIZE); |
405 |
|
|
|
406 |
|
16918 |
decode_fixed_sparse(&fixed_cb, params->fc_indexes[i], ctx->mode, |
407 |
|
16918 |
ctx->past_pitch_gain < 0.8); |
408 |
|
|
|
409 |
|
16918 |
eval_ir(pAz, T0, impulse_response, modes[ctx->mode].pitch_sharp_factor); |
410 |
|
|
|
411 |
|
16918 |
convolute_with_sparse(fixed_vector, &fixed_cb, impulse_response, |
412 |
|
|
SUBFR_SIZE); |
413 |
|
|
|
414 |
|
16918 |
avg_energy = (0.01 + avpriv_scalarproduct_float_c(fixed_vector, |
415 |
|
|
fixed_vector, |
416 |
|
16918 |
SUBFR_SIZE)) / |
417 |
|
|
SUBFR_SIZE; |
418 |
|
|
|
419 |
|
16918 |
ctx->past_pitch_gain = pitch_gain = gain_cb[params->gc_index[i]][0]; |
420 |
|
|
|
421 |
|
16918 |
gain_code = ff_amr_set_fixed_gain(gain_cb[params->gc_index[i]][1], |
422 |
|
16918 |
avg_energy, ctx->energy_history, |
423 |
|
|
34 - 15.0/(0.05*M_LN10/M_LN2), |
424 |
|
|
pred); |
425 |
|
|
|
426 |
|
16918 |
ff_weighted_vector_sumf(excitation, excitation, fixed_vector, |
427 |
|
|
pitch_gain, gain_code, SUBFR_SIZE); |
428 |
|
|
|
429 |
|
16918 |
pitch_gain *= 0.5 * pitch_gain; |
430 |
✓✓ |
16918 |
pitch_gain = FFMIN(pitch_gain, 0.4); |
431 |
|
|
|
432 |
|
16918 |
ctx->gain_mem = 0.7 * ctx->gain_mem + 0.3 * pitch_gain; |
433 |
✓✓ |
16918 |
ctx->gain_mem = FFMIN(ctx->gain_mem, pitch_gain); |
434 |
|
16918 |
gain_code *= ctx->gain_mem; |
435 |
|
|
|
436 |
✓✓ |
828982 |
for (j = 0; j < SUBFR_SIZE; j++) |
437 |
|
812064 |
fixed_vector[j] = excitation[j] - gain_code * fixed_vector[j]; |
438 |
|
|
|
439 |
✓✓ |
16918 |
if (ctx->mode == MODE_5k0) { |
440 |
|
3370 |
postfilter_5k0(ctx, pAz, fixed_vector); |
441 |
|
|
|
442 |
|
3370 |
ff_celp_lp_synthesis_filterf(ctx->postfilter_syn5k0 + LP_FILTER_ORDER + i*SUBFR_SIZE, |
443 |
|
|
pAz, excitation, SUBFR_SIZE, |
444 |
|
|
LP_FILTER_ORDER); |
445 |
|
|
} |
446 |
|
|
|
447 |
|
16918 |
ff_celp_lp_synthesis_filterf(synth + i*SUBFR_SIZE, pAz, fixed_vector, |
448 |
|
|
SUBFR_SIZE, LP_FILTER_ORDER); |
449 |
|
|
|
450 |
|
16918 |
excitation += SUBFR_SIZE; |
451 |
|
|
} |
452 |
|
|
|
453 |
|
5190 |
memcpy(synth - LP_FILTER_ORDER, synth + frame_size - LP_FILTER_ORDER, |
454 |
|
|
LP_FILTER_ORDER * sizeof(float)); |
455 |
|
|
|
456 |
✓✓ |
5190 |
if (ctx->mode == MODE_5k0) { |
457 |
✓✓ |
4044 |
for (i = 0; i < subframe_count; i++) { |
458 |
|
3370 |
float energy = avpriv_scalarproduct_float_c(ctx->postfilter_syn5k0 + LP_FILTER_ORDER + i * SUBFR_SIZE, |
459 |
|
3370 |
ctx->postfilter_syn5k0 + LP_FILTER_ORDER + i * SUBFR_SIZE, |
460 |
|
|
SUBFR_SIZE); |
461 |
|
3370 |
ff_adaptive_gain_control(&synth[i * SUBFR_SIZE], |
462 |
|
3370 |
&synth[i * SUBFR_SIZE], energy, |
463 |
|
|
SUBFR_SIZE, 0.9, &ctx->postfilter_agc); |
464 |
|
|
} |
465 |
|
|
|
466 |
|
674 |
memcpy(ctx->postfilter_syn5k0, ctx->postfilter_syn5k0 + frame_size, |
467 |
|
|
LP_FILTER_ORDER*sizeof(float)); |
468 |
|
|
} |
469 |
|
5190 |
memmove(ctx->excitation, excitation - PITCH_DELAY_MAX - L_INTERPOL, |
470 |
|
|
(PITCH_DELAY_MAX + L_INTERPOL) * sizeof(float)); |
471 |
|
|
|
472 |
|
5190 |
ff_acelp_apply_order_2_transfer_function(out_data, synth, |
473 |
|
5190 |
(const float[2]) {-1.99997 , 1.000000000}, |
474 |
|
5190 |
(const float[2]) {-1.93307352, 0.935891986}, |
475 |
|
|
0.939805806, |
476 |
|
5190 |
ctx->highpass_filt_mem, |
477 |
|
|
frame_size); |
478 |
|
5190 |
} |
479 |
|
|
|
480 |
|
9 |
static av_cold int sipr_decoder_init(AVCodecContext * avctx) |
481 |
|
|
{ |
482 |
|
9 |
SiprContext *ctx = avctx->priv_data; |
483 |
|
|
int i; |
484 |
|
|
|
485 |
✓✓✓✓ ✗ |
9 |
switch (avctx->block_align) { |
486 |
|
2 |
case 20: ctx->mode = MODE_16k; break; |
487 |
|
3 |
case 19: ctx->mode = MODE_8k5; break; |
488 |
|
2 |
case 29: ctx->mode = MODE_6k5; break; |
489 |
|
2 |
case 37: ctx->mode = MODE_5k0; break; |
490 |
|
|
default: |
491 |
|
|
if (avctx->bit_rate > 12200) ctx->mode = MODE_16k; |
492 |
|
|
else if (avctx->bit_rate > 7500 ) ctx->mode = MODE_8k5; |
493 |
|
|
else if (avctx->bit_rate > 5750 ) ctx->mode = MODE_6k5; |
494 |
|
|
else ctx->mode = MODE_5k0; |
495 |
|
|
av_log(avctx, AV_LOG_WARNING, |
496 |
|
|
"Invalid block_align: %d. Mode %s guessed based on bitrate: %"PRId64"\n", |
497 |
|
|
avctx->block_align, modes[ctx->mode].mode_name, avctx->bit_rate); |
498 |
|
|
} |
499 |
|
|
|
500 |
|
9 |
av_log(avctx, AV_LOG_DEBUG, "Mode: %s\n", modes[ctx->mode].mode_name); |
501 |
|
|
|
502 |
✓✓ |
9 |
if (ctx->mode == MODE_16k) { |
503 |
|
2 |
ff_sipr_init_16k(ctx); |
504 |
|
2 |
ctx->decode_frame = ff_sipr_decode_frame_16k; |
505 |
|
|
} else { |
506 |
|
7 |
ctx->decode_frame = decode_frame; |
507 |
|
|
} |
508 |
|
|
|
509 |
✓✓ |
99 |
for (i = 0; i < LP_FILTER_ORDER; i++) |
510 |
|
90 |
ctx->lsp_history[i] = cos((i+1) * M_PI / (LP_FILTER_ORDER + 1)); |
511 |
|
|
|
512 |
✓✓ |
45 |
for (i = 0; i < 4; i++) |
513 |
|
36 |
ctx->energy_history[i] = -14; |
514 |
|
|
|
515 |
|
9 |
avctx->channels = 1; |
516 |
|
9 |
avctx->channel_layout = AV_CH_LAYOUT_MONO; |
517 |
|
9 |
avctx->sample_fmt = AV_SAMPLE_FMT_FLT; |
518 |
|
|
|
519 |
|
9 |
return 0; |
520 |
|
|
} |
521 |
|
|
|
522 |
|
6423 |
static int sipr_decode_frame(AVCodecContext *avctx, void *data, |
523 |
|
|
int *got_frame_ptr, AVPacket *avpkt) |
524 |
|
|
{ |
525 |
|
6423 |
SiprContext *ctx = avctx->priv_data; |
526 |
|
6423 |
AVFrame *frame = data; |
527 |
|
6423 |
const uint8_t *buf=avpkt->data; |
528 |
|
|
SiprParameters parm; |
529 |
|
6423 |
const SiprModeParam *mode_par = &modes[ctx->mode]; |
530 |
|
|
GetBitContext gb; |
531 |
|
|
float *samples; |
532 |
✓✓ |
6423 |
int subframe_size = ctx->mode == MODE_16k ? L_SUBFR_16k : SUBFR_SIZE; |
533 |
|
|
int i, ret; |
534 |
|
|
|
535 |
|
6423 |
ctx->avctx = avctx; |
536 |
✗✓ |
6423 |
if (avpkt->size < (mode_par->bits_per_frame >> 3)) { |
537 |
|
|
av_log(avctx, AV_LOG_ERROR, |
538 |
|
|
"Error processing packet: packet size (%d) too small\n", |
539 |
|
|
avpkt->size); |
540 |
|
|
return AVERROR_INVALIDDATA; |
541 |
|
|
} |
542 |
|
|
|
543 |
|
|
/* get output buffer */ |
544 |
|
6423 |
frame->nb_samples = mode_par->frames_per_packet * subframe_size * |
545 |
|
6423 |
mode_par->subframe_count; |
546 |
✗✓ |
6423 |
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
547 |
|
|
return ret; |
548 |
|
6423 |
samples = (float *)frame->data[0]; |
549 |
|
|
|
550 |
|
6423 |
init_get_bits(&gb, buf, mode_par->bits_per_frame); |
551 |
|
|
|
552 |
✓✓ |
14864 |
for (i = 0; i < mode_par->frames_per_packet; i++) { |
553 |
|
8441 |
decode_parameters(&parm, &gb, mode_par); |
554 |
|
|
|
555 |
|
8441 |
ctx->decode_frame(ctx, &parm, samples); |
556 |
|
|
|
557 |
|
8441 |
samples += subframe_size * mode_par->subframe_count; |
558 |
|
|
} |
559 |
|
|
|
560 |
|
6423 |
*got_frame_ptr = 1; |
561 |
|
|
|
562 |
|
6423 |
return mode_par->bits_per_frame >> 3; |
563 |
|
|
} |
564 |
|
|
|
565 |
|
|
AVCodec ff_sipr_decoder = { |
566 |
|
|
.name = "sipr", |
567 |
|
|
.long_name = NULL_IF_CONFIG_SMALL("RealAudio SIPR / ACELP.NET"), |
568 |
|
|
.type = AVMEDIA_TYPE_AUDIO, |
569 |
|
|
.id = AV_CODEC_ID_SIPR, |
570 |
|
|
.priv_data_size = sizeof(SiprContext), |
571 |
|
|
.init = sipr_decoder_init, |
572 |
|
|
.decode = sipr_decode_frame, |
573 |
|
|
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF, |
574 |
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, |
575 |
|
|
}; |