FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/sipr.c	Lines:	203	213	95.3 %
Date:	2021-04-18 10:33:33	Branches:	90	100	90.0 %


/*
 * SIPR / ACELP.NET decoder
 *
 * Copyright (c) 2008 Vladimir Voroshilov
 * Copyright (c) 2009 Vitor Sessak
 *
 * 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 <math.h>
#include <stdint.h>
#include <string.h>

#include "libavutil/channel_layout.h"
#include "libavutil/float_dsp.h"
#include "libavutil/mathematics.h"

#define BITSTREAM_READER_LE
#include "avcodec.h"
#include "get_bits.h"
#include "internal.h"
#include "lsp.h"
#include "acelp_vectors.h"
#include "acelp_pitch_delay.h"
#include "acelp_filters.h"
#include "celp_filters.h"

#define MAX_SUBFRAME_COUNT   5

#include "sipr.h"
#include "siprdata.h"

typedef struct SiprModeParam {
    const char *mode_name;
    uint16_t bits_per_frame;
    uint8_t subframe_count;
    uint8_t frames_per_packet;
    float pitch_sharp_factor;

    /* bitstream parameters */
    uint8_t number_of_fc_indexes;
    uint8_t ma_predictor_bits;  ///< size in bits of the switched MA predictor

    /** size in bits of the i-th stage vector of quantizer */
    uint8_t vq_indexes_bits[5];

    /** size in bits of the adaptive-codebook index for every subframe */
    uint8_t pitch_delay_bits[5];

    uint8_t gp_index_bits;
    uint8_t fc_index_bits[10]; ///< size in bits of the fixed codebook indexes
    uint8_t gc_index_bits;     ///< size in bits of the gain  codebook indexes
} SiprModeParam;

static const SiprModeParam modes[MODE_COUNT] = {
    [MODE_16k] = {
        .mode_name          = "16k",
        .bits_per_frame     = 160,
        .subframe_count     = SUBFRAME_COUNT_16k,
        .frames_per_packet  = 1,
        .pitch_sharp_factor = 0.00,

        .number_of_fc_indexes = 10,
        .ma_predictor_bits    = 1,
        .vq_indexes_bits      = {7, 8, 7, 7, 7},
        .pitch_delay_bits     = {9, 6},
        .gp_index_bits        = 4,
        .fc_index_bits        = {4, 5, 4, 5, 4, 5, 4, 5, 4, 5},
        .gc_index_bits        = 5
    },

    [MODE_8k5] = {
        .mode_name          = "8k5",
        .bits_per_frame     = 152,
        .subframe_count     = 3,
        .frames_per_packet  = 1,
        .pitch_sharp_factor = 0.8,

        .number_of_fc_indexes = 3,
        .ma_predictor_bits    = 0,
        .vq_indexes_bits      = {6, 7, 7, 7, 5},
        .pitch_delay_bits     = {8, 5, 5},
        .gp_index_bits        = 0,
        .fc_index_bits        = {9, 9, 9},
        .gc_index_bits        = 7
    },

    [MODE_6k5] = {
        .mode_name          = "6k5",
        .bits_per_frame     = 232,
        .subframe_count     = 3,
        .frames_per_packet  = 2,
        .pitch_sharp_factor = 0.8,

        .number_of_fc_indexes = 3,
        .ma_predictor_bits    = 0,
        .vq_indexes_bits      = {6, 7, 7, 7, 5},
        .pitch_delay_bits     = {8, 5, 5},
        .gp_index_bits        = 0,
        .fc_index_bits        = {5, 5, 5},
        .gc_index_bits        = 7
    },

    [MODE_5k0] = {
        .mode_name          = "5k0",
        .bits_per_frame     = 296,
        .subframe_count     = 5,
        .frames_per_packet  = 2,
        .pitch_sharp_factor = 0.85,

        .number_of_fc_indexes = 1,
        .ma_predictor_bits    = 0,
        .vq_indexes_bits      = {6, 7, 7, 7, 5},
        .pitch_delay_bits     = {8, 5, 8, 5, 5},
        .gp_index_bits        = 0,
        .fc_index_bits        = {10},
        .gc_index_bits        = 7
    }
};

const float ff_pow_0_5[] = {
    1.0/(1 <<  1), 1.0/(1 <<  2), 1.0/(1 <<  3), 1.0/(1 <<  4),
    1.0/(1 <<  5), 1.0/(1 <<  6), 1.0/(1 <<  7), 1.0/(1 <<  8),
    1.0/(1 <<  9), 1.0/(1 << 10), 1.0/(1 << 11), 1.0/(1 << 12),
    1.0/(1 << 13), 1.0/(1 << 14), 1.0/(1 << 15), 1.0/(1 << 16)
};

static void dequant(float *out, const int *idx, const float * const cbs[])
{
    int i;
    int stride  = 2;
    int num_vec = 5;

    for (i = 0; i < num_vec; i++)
        memcpy(out + stride*i, cbs[i] + stride*idx[i], stride*sizeof(float));

}

static void lsf_decode_fp(float *lsfnew, float *lsf_history,
                          const SiprParameters *parm)
{
    int i;
    float lsf_tmp[LP_FILTER_ORDER];

    dequant(lsf_tmp, parm->vq_indexes, lsf_codebooks);

    for (i = 0; i < LP_FILTER_ORDER; i++)
        lsfnew[i] = lsf_history[i] * 0.33 + lsf_tmp[i] + mean_lsf[i];

    ff_sort_nearly_sorted_floats(lsfnew, LP_FILTER_ORDER - 1);

    /* Note that a minimum distance is not enforced between the last value and
       the previous one, contrary to what is done in ff_acelp_reorder_lsf() */
    ff_set_min_dist_lsf(lsfnew, LSFQ_DIFF_MIN, LP_FILTER_ORDER - 1);
    lsfnew[9] = FFMIN(lsfnew[LP_FILTER_ORDER - 1], 1.3 * M_PI);

    memcpy(lsf_history, lsf_tmp, LP_FILTER_ORDER * sizeof(*lsf_history));

    for (i = 0; i < LP_FILTER_ORDER - 1; i++)
        lsfnew[i] = cos(lsfnew[i]);
    lsfnew[LP_FILTER_ORDER - 1] *= 6.153848 / M_PI;
}

/** Apply pitch lag to the fixed vector (AMR section 6.1.2). */
static void pitch_sharpening(int pitch_lag_int, float beta,
                             float *fixed_vector)
{
    int i;

    for (i = pitch_lag_int; i < SUBFR_SIZE; i++)
        fixed_vector[i] += beta * fixed_vector[i - pitch_lag_int];
}

/**
 * Extract decoding parameters from the input bitstream.
 * @param parms          parameters structure
 * @param pgb            pointer to initialized GetBitContext structure
 */
static void decode_parameters(SiprParameters* parms, GetBitContext *pgb,
                              const SiprModeParam *p)
{
    int i, j;

    if (p->ma_predictor_bits)
        parms->ma_pred_switch       = get_bits(pgb, p->ma_predictor_bits);

    for (i = 0; i < 5; i++)
        parms->vq_indexes[i]        = get_bits(pgb, p->vq_indexes_bits[i]);

    for (i = 0; i < p->subframe_count; i++) {
        parms->pitch_delay[i]       = get_bits(pgb, p->pitch_delay_bits[i]);
        if (p->gp_index_bits)
            parms->gp_index[i]      = get_bits(pgb, p->gp_index_bits);

        for (j = 0; j < p->number_of_fc_indexes; j++)
            parms->fc_indexes[i][j] = get_bits(pgb, p->fc_index_bits[j]);

        parms->gc_index[i]          = get_bits(pgb, p->gc_index_bits);
    }
}

static void sipr_decode_lp(float *lsfnew, const float *lsfold, float *Az,
                           int num_subfr)
{
    double lsfint[LP_FILTER_ORDER];
    int i,j;
    float t, t0 = 1.0 / num_subfr;

    t = t0 * 0.5;
    for (i = 0; i < num_subfr; i++) {
        for (j = 0; j < LP_FILTER_ORDER; j++)
            lsfint[j] = lsfold[j] * (1 - t) + t * lsfnew[j];

        ff_amrwb_lsp2lpc(lsfint, Az, LP_FILTER_ORDER);
        Az += LP_FILTER_ORDER;
        t += t0;
    }
}

/**
 * Evaluate the adaptive impulse response.
 */
static void eval_ir(const float *Az, int pitch_lag, float *freq,
                    float pitch_sharp_factor)
{
    float tmp1[SUBFR_SIZE+1], tmp2[LP_FILTER_ORDER+1];
    int i;

    tmp1[0] = 1.0;
    for (i = 0; i < LP_FILTER_ORDER; i++) {
        tmp1[i+1] = Az[i] * ff_pow_0_55[i];
        tmp2[i  ] = Az[i] * ff_pow_0_7 [i];
    }
    memset(tmp1 + 11, 0, 37 * sizeof(float));

    ff_celp_lp_synthesis_filterf(freq, tmp2, tmp1, SUBFR_SIZE,
                                 LP_FILTER_ORDER);

    pitch_sharpening(pitch_lag, pitch_sharp_factor, freq);
}

/**
 * Evaluate the convolution of a vector with a sparse vector.
 */
static void convolute_with_sparse(float *out, const AMRFixed *pulses,
                                  const float *shape, int length)
{
    int i, j;

    memset(out, 0, length*sizeof(float));
    for (i = 0; i < pulses->n; i++)
        for (j = pulses->x[i]; j < length; j++)
            out[j] += pulses->y[i] * shape[j - pulses->x[i]];
}

/**
 * Apply postfilter, very similar to AMR one.
 */
static void postfilter_5k0(SiprContext *ctx, const float *lpc, float *samples)
{
    float buf[SUBFR_SIZE + LP_FILTER_ORDER];
    float *pole_out = buf + LP_FILTER_ORDER;
    float lpc_n[LP_FILTER_ORDER];
    float lpc_d[LP_FILTER_ORDER];
    int i;

    for (i = 0; i < LP_FILTER_ORDER; i++) {
        lpc_d[i] = lpc[i] * ff_pow_0_75[i];
        lpc_n[i] = lpc[i] * ff_pow_0_5 [i];
    };

    memcpy(pole_out - LP_FILTER_ORDER, ctx->postfilter_mem,
           LP_FILTER_ORDER*sizeof(float));

    ff_celp_lp_synthesis_filterf(pole_out, lpc_d, samples, SUBFR_SIZE,
                                 LP_FILTER_ORDER);

    memcpy(ctx->postfilter_mem, pole_out + SUBFR_SIZE - LP_FILTER_ORDER,
           LP_FILTER_ORDER*sizeof(float));

    ff_tilt_compensation(&ctx->tilt_mem, 0.4, pole_out, SUBFR_SIZE);

    memcpy(pole_out - LP_FILTER_ORDER, ctx->postfilter_mem5k0,
           LP_FILTER_ORDER*sizeof(*pole_out));

    memcpy(ctx->postfilter_mem5k0, pole_out + SUBFR_SIZE - LP_FILTER_ORDER,
           LP_FILTER_ORDER*sizeof(*pole_out));

    ff_celp_lp_zero_synthesis_filterf(samples, lpc_n, pole_out, SUBFR_SIZE,
                                      LP_FILTER_ORDER);

}

static void decode_fixed_sparse(AMRFixed *fixed_sparse, const int16_t *pulses,
                                SiprMode mode, int low_gain)
{
    int i;

    switch (mode) {
    case MODE_6k5:
        for (i = 0; i < 3; i++) {
            fixed_sparse->x[i] = 3 * (pulses[i] & 0xf) + i;
            fixed_sparse->y[i] = pulses[i] & 0x10 ? -1 : 1;
        }
        fixed_sparse->n = 3;
        break;
    case MODE_8k5:
        for (i = 0; i < 3; i++) {
            fixed_sparse->x[2*i    ] = 3 * ((pulses[i] >> 4) & 0xf) + i;
            fixed_sparse->x[2*i + 1] = 3 * ( pulses[i]       & 0xf) + i;

            fixed_sparse->y[2*i    ] = (pulses[i] & 0x100) ? -1.0: 1.0;

            fixed_sparse->y[2*i + 1] =
                (fixed_sparse->x[2*i + 1] < fixed_sparse->x[2*i]) ?
                -fixed_sparse->y[2*i    ] : fixed_sparse->y[2*i];
        }

        fixed_sparse->n = 6;
        break;
    case MODE_5k0:
    default:
        if (low_gain) {
            int offset = (pulses[0] & 0x200) ? 2 : 0;
            int val = pulses[0];

            for (i = 0; i < 3; i++) {
                int index = (val & 0x7) * 6 + 4 - i*2;

                fixed_sparse->y[i] = (offset + index) & 0x3 ? -1 : 1;
                fixed_sparse->x[i] = index;

                val >>= 3;
            }
            fixed_sparse->n = 3;
        } else {
            int pulse_subset = (pulses[0] >> 8) & 1;

            fixed_sparse->x[0] = ((pulses[0] >> 4) & 15) * 3 + pulse_subset;
            fixed_sparse->x[1] = ( pulses[0]       & 15) * 3 + pulse_subset + 1;

            fixed_sparse->y[0] = pulses[0] & 0x200 ? -1 : 1;
            fixed_sparse->y[1] = -fixed_sparse->y[0];
            fixed_sparse->n = 2;
        }
        break;
    }
}

static void decode_frame(SiprContext *ctx, SiprParameters *params,
                         float *out_data)
{
    int i, j;
    int subframe_count = modes[ctx->mode].subframe_count;
    int frame_size = subframe_count * SUBFR_SIZE;
    float Az[LP_FILTER_ORDER * MAX_SUBFRAME_COUNT];
    float *excitation;
    float ir_buf[SUBFR_SIZE + LP_FILTER_ORDER];
    float lsf_new[LP_FILTER_ORDER];
    float *impulse_response = ir_buf + LP_FILTER_ORDER;
    float *synth = ctx->synth_buf + 16; // 16 instead of LP_FILTER_ORDER for
                                        // memory alignment
    int t0_first = 0;
    AMRFixed fixed_cb;

    memset(ir_buf, 0, LP_FILTER_ORDER * sizeof(float));
    lsf_decode_fp(lsf_new, ctx->lsf_history, params);

    sipr_decode_lp(lsf_new, ctx->lsp_history, Az, subframe_count);

    memcpy(ctx->lsp_history, lsf_new, LP_FILTER_ORDER * sizeof(float));

    excitation = ctx->excitation + PITCH_DELAY_MAX + L_INTERPOL;

    for (i = 0; i < subframe_count; i++) {
        float *pAz = Az + i*LP_FILTER_ORDER;
        float fixed_vector[SUBFR_SIZE];
        int T0,T0_frac;
        float pitch_gain, gain_code, avg_energy;

        ff_decode_pitch_lag(&T0, &T0_frac, params->pitch_delay[i], t0_first, i,
                            ctx->mode == MODE_5k0, 6);

        if (i == 0 || (i == 2 && ctx->mode == MODE_5k0))
            t0_first = T0;

        ff_acelp_interpolatef(excitation, excitation - T0 + (T0_frac <= 0),
                              ff_b60_sinc, 6,
                              2 * ((2 + T0_frac)%3 + 1), LP_FILTER_ORDER,
                              SUBFR_SIZE);

        decode_fixed_sparse(&fixed_cb, params->fc_indexes[i], ctx->mode,
                            ctx->past_pitch_gain < 0.8);

        eval_ir(pAz, T0, impulse_response, modes[ctx->mode].pitch_sharp_factor);

        convolute_with_sparse(fixed_vector, &fixed_cb, impulse_response,
                              SUBFR_SIZE);

        avg_energy = (0.01 + avpriv_scalarproduct_float_c(fixed_vector,
                                                          fixed_vector,
                                                          SUBFR_SIZE)) /
                     SUBFR_SIZE;

        ctx->past_pitch_gain = pitch_gain = gain_cb[params->gc_index[i]][0];

        gain_code = ff_amr_set_fixed_gain(gain_cb[params->gc_index[i]][1],
                                          avg_energy, ctx->energy_history,
                                          34 - 15.0/(0.05*M_LN10/M_LN2),
                                          pred);

        ff_weighted_vector_sumf(excitation, excitation, fixed_vector,
                                pitch_gain, gain_code, SUBFR_SIZE);

        pitch_gain *= 0.5 * pitch_gain;
        pitch_gain = FFMIN(pitch_gain, 0.4);

        ctx->gain_mem = 0.7 * ctx->gain_mem + 0.3 * pitch_gain;
        ctx->gain_mem = FFMIN(ctx->gain_mem, pitch_gain);
        gain_code *= ctx->gain_mem;

        for (j = 0; j < SUBFR_SIZE; j++)
            fixed_vector[j] = excitation[j] - gain_code * fixed_vector[j];

        if (ctx->mode == MODE_5k0) {
            postfilter_5k0(ctx, pAz, fixed_vector);

            ff_celp_lp_synthesis_filterf(ctx->postfilter_syn5k0 + LP_FILTER_ORDER + i*SUBFR_SIZE,
                                         pAz, excitation, SUBFR_SIZE,
                                         LP_FILTER_ORDER);
        }

        ff_celp_lp_synthesis_filterf(synth + i*SUBFR_SIZE, pAz, fixed_vector,
                                     SUBFR_SIZE, LP_FILTER_ORDER);

        excitation += SUBFR_SIZE;
    }

    memcpy(synth - LP_FILTER_ORDER, synth + frame_size - LP_FILTER_ORDER,
           LP_FILTER_ORDER * sizeof(float));

    if (ctx->mode == MODE_5k0) {
        for (i = 0; i < subframe_count; i++) {
            float energy = avpriv_scalarproduct_float_c(ctx->postfilter_syn5k0 + LP_FILTER_ORDER + i * SUBFR_SIZE,
                                                        ctx->postfilter_syn5k0 + LP_FILTER_ORDER + i * SUBFR_SIZE,
                                                        SUBFR_SIZE);
            ff_adaptive_gain_control(&synth[i * SUBFR_SIZE],
                                     &synth[i * SUBFR_SIZE], energy,
                                     SUBFR_SIZE, 0.9, &ctx->postfilter_agc);
        }

        memcpy(ctx->postfilter_syn5k0, ctx->postfilter_syn5k0 + frame_size,
               LP_FILTER_ORDER*sizeof(float));
    }
    memmove(ctx->excitation, excitation - PITCH_DELAY_MAX - L_INTERPOL,
           (PITCH_DELAY_MAX + L_INTERPOL) * sizeof(float));

    ff_acelp_apply_order_2_transfer_function(out_data, synth,
                                             (const float[2]) {-1.99997   , 1.000000000},
                                             (const float[2]) {-1.93307352, 0.935891986},
                                             0.939805806,
                                             ctx->highpass_filt_mem,
                                             frame_size);
}

static av_cold int sipr_decoder_init(AVCodecContext * avctx)
{
    SiprContext *ctx = avctx->priv_data;
    int i;

    switch (avctx->block_align) {
    case 20: ctx->mode = MODE_16k; break;
    case 19: ctx->mode = MODE_8k5; break;
    case 29: ctx->mode = MODE_6k5; break;
    case 37: ctx->mode = MODE_5k0; break;
    default:
        if      (avctx->bit_rate > 12200) ctx->mode = MODE_16k;
        else if (avctx->bit_rate > 7500 ) ctx->mode = MODE_8k5;
        else if (avctx->bit_rate > 5750 ) ctx->mode = MODE_6k5;
        else                              ctx->mode = MODE_5k0;
        av_log(avctx, AV_LOG_WARNING,
               "Invalid block_align: %d. Mode %s guessed based on bitrate: %"PRId64"\n",
               avctx->block_align, modes[ctx->mode].mode_name, avctx->bit_rate);
    }

    av_log(avctx, AV_LOG_DEBUG, "Mode: %s\n", modes[ctx->mode].mode_name);

    if (ctx->mode == MODE_16k) {
        ff_sipr_init_16k(ctx);
        ctx->decode_frame = ff_sipr_decode_frame_16k;
    } else {
        ctx->decode_frame = decode_frame;
    }

    for (i = 0; i < LP_FILTER_ORDER; i++)
        ctx->lsp_history[i] = cos((i+1) * M_PI / (LP_FILTER_ORDER + 1));

    for (i = 0; i < 4; i++)
        ctx->energy_history[i] = -14;

    avctx->channels       = 1;
    avctx->channel_layout = AV_CH_LAYOUT_MONO;
    avctx->sample_fmt     = AV_SAMPLE_FMT_FLT;

    return 0;
}

static int sipr_decode_frame(AVCodecContext *avctx, void *data,
                             int *got_frame_ptr, AVPacket *avpkt)
{
    SiprContext *ctx = avctx->priv_data;
    AVFrame *frame   = data;
    const uint8_t *buf=avpkt->data;
    SiprParameters parm;
    const SiprModeParam *mode_par = &modes[ctx->mode];
    GetBitContext gb;
    float *samples;
    int subframe_size = ctx->mode == MODE_16k ? L_SUBFR_16k : SUBFR_SIZE;
    int i, ret;

    ctx->avctx = avctx;
    if (avpkt->size < (mode_par->bits_per_frame >> 3)) {
        av_log(avctx, AV_LOG_ERROR,
               "Error processing packet: packet size (%d) too small\n",
               avpkt->size);
        return AVERROR_INVALIDDATA;
    }

    /* get output buffer */
    frame->nb_samples = mode_par->frames_per_packet * subframe_size *
                        mode_par->subframe_count;
    if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
        return ret;
    samples = (float *)frame->data[0];

    init_get_bits(&gb, buf, mode_par->bits_per_frame);

    for (i = 0; i < mode_par->frames_per_packet; i++) {
        decode_parameters(&parm, &gb, mode_par);

        ctx->decode_frame(ctx, &parm, samples);

        samples += subframe_size * mode_par->subframe_count;
    }

    *got_frame_ptr = 1;

    return mode_par->bits_per_frame >> 3;
}

AVCodec ff_sipr_decoder = {
    .name           = "sipr",
    .long_name      = NULL_IF_CONFIG_SMALL("RealAudio SIPR / ACELP.NET"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_SIPR,
    .priv_data_size = sizeof(SiprContext),
    .init           = sipr_decoder_init,
    .decode         = sipr_decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
};


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* SIPR / ACELP.NET decoder
3			*
4			* Copyright (c) 2008 Vladimir Voroshilov
5			* Copyright (c) 2009 Vitor Sessak
6			*
7			* This file is part of FFmpeg.
8			*
9			* FFmpeg is free software; you can redistribute it and/or
10			* modify it under the terms of the GNU Lesser General Public
11			* License as published by the Free Software Foundation; either
12			* version 2.1 of the License, or (at your option) any later version.
13			*
14			* FFmpeg is distributed in the hope that it will be useful,
15			* but WITHOUT ANY WARRANTY; without even the implied warranty of
16			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17			* Lesser General Public License for more details.
18			*
19			* You should have received a copy of the GNU Lesser General Public
20			* License along with FFmpeg; if not, write to the Free Software
21			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22			*/
23
24			#include <math.h>
25			#include <stdint.h>
26			#include <string.h>
27
28			#include "libavutil/channel_layout.h"
29			#include "libavutil/float_dsp.h"
30			#include "libavutil/mathematics.h"
31
32			#define BITSTREAM_READER_LE
33			#include "avcodec.h"
34			#include "get_bits.h"
35			#include "internal.h"
36			#include "lsp.h"
37			#include "acelp_vectors.h"
38			#include "acelp_pitch_delay.h"
39			#include "acelp_filters.h"
40			#include "celp_filters.h"
41
42			#define MAX_SUBFRAME_COUNT 5
43
44			#include "sipr.h"
45			#include "siprdata.h"
46
47			typedef struct SiprModeParam {
48			const char *mode_name;
49			uint16_t bits_per_frame;
50			uint8_t subframe_count;
51			uint8_t frames_per_packet;
52			float pitch_sharp_factor;
53
54			/* bitstream parameters */
55			uint8_t number_of_fc_indexes;
56			uint8_t ma_predictor_bits; ///< size in bits of the switched MA predictor
57
58			/** size in bits of the i-th stage vector of quantizer */
59			uint8_t vq_indexes_bits[5];
60
61			/** size in bits of the adaptive-codebook index for every subframe */
62			uint8_t pitch_delay_bits[5];
63
64			uint8_t gp_index_bits;
65			uint8_t fc_index_bits[10]; ///< size in bits of the fixed codebook indexes
66			uint8_t gc_index_bits; ///< size in bits of the gain codebook indexes
67			} SiprModeParam;
68
69			static const SiprModeParam modes[MODE_COUNT] = {
70			[MODE_16k] = {
71			.mode_name = "16k",
72			.bits_per_frame = 160,
73			.subframe_count = SUBFRAME_COUNT_16k,
74			.frames_per_packet = 1,
75			.pitch_sharp_factor = 0.00,
76
77			.number_of_fc_indexes = 10,
78			.ma_predictor_bits = 1,
79			.vq_indexes_bits = {7, 8, 7, 7, 7},
80			.pitch_delay_bits = {9, 6},
81			.gp_index_bits = 4,
82			.fc_index_bits = {4, 5, 4, 5, 4, 5, 4, 5, 4, 5},
83			.gc_index_bits = 5
84			},
85
86			[MODE_8k5] = {
87			.mode_name = "8k5",
88			.bits_per_frame = 152,
89			.subframe_count = 3,
90			.frames_per_packet = 1,
91			.pitch_sharp_factor = 0.8,
92
93			.number_of_fc_indexes = 3,
94			.ma_predictor_bits = 0,
95			.vq_indexes_bits = {6, 7, 7, 7, 5},
96			.pitch_delay_bits = {8, 5, 5},
97			.gp_index_bits = 0,
98			.fc_index_bits = {9, 9, 9},
99			.gc_index_bits = 7
100			},
101
102			[MODE_6k5] = {
103			.mode_name = "6k5",
104			.bits_per_frame = 232,
105			.subframe_count = 3,
106			.frames_per_packet = 2,
107			.pitch_sharp_factor = 0.8,
108
109			.number_of_fc_indexes = 3,
110			.ma_predictor_bits = 0,
111			.vq_indexes_bits = {6, 7, 7, 7, 5},
112			.pitch_delay_bits = {8, 5, 5},
113			.gp_index_bits = 0,
114			.fc_index_bits = {5, 5, 5},
115			.gc_index_bits = 7
116			},
117
118			[MODE_5k0] = {
119			.mode_name = "5k0",
120			.bits_per_frame = 296,
121			.subframe_count = 5,
122			.frames_per_packet = 2,
123			.pitch_sharp_factor = 0.85,
124
125			.number_of_fc_indexes = 1,
126			.ma_predictor_bits = 0,
127			.vq_indexes_bits = {6, 7, 7, 7, 5},
128			.pitch_delay_bits = {8, 5, 8, 5, 5},
129			.gp_index_bits = 0,
130			.fc_index_bits = {10},
131			.gc_index_bits = 7
132			}
133			};
134
135			const float ff_pow_0_5[] = {
136			1.0/(1 << 1), 1.0/(1 << 2), 1.0/(1 << 3), 1.0/(1 << 4),
137			1.0/(1 << 5), 1.0/(1 << 6), 1.0/(1 << 7), 1.0/(1 << 8),
138			1.0/(1 << 9), 1.0/(1 << 10), 1.0/(1 << 11), 1.0/(1 << 12),
139			1.0/(1 << 13), 1.0/(1 << 14), 1.0/(1 << 15), 1.0/(1 << 16)
140			};
141
142		5190	static void dequant(float out, const int idx, const float * const cbs[])
143			{
144			int i;
145		5190	int stride = 2;
146		5190	int num_vec = 5;
147
148	✓✓	31140	for (i = 0; i < num_vec; i++)
149		25950	memcpy(out + stridei, cbs[i] + strideidx[i], stride*sizeof(float));
150
151		5190	}
152
153		5190	static void lsf_decode_fp(float lsfnew, float lsf_history,
154			const SiprParameters *parm)
155			{
156			int i;
157			float lsf_tmp[LP_FILTER_ORDER];
158
159		5190	dequant(lsf_tmp, parm->vq_indexes, lsf_codebooks);
160
161	✓✓	57090	for (i = 0; i < LP_FILTER_ORDER; i++)
162		51900	lsfnew[i] = lsf_history[i] * 0.33 + lsf_tmp[i] + mean_lsf[i];
163
164		5190	ff_sort_nearly_sorted_floats(lsfnew, LP_FILTER_ORDER - 1);
165
166			/* Note that a minimum distance is not enforced between the last value and
167			the previous one, contrary to what is done in ff_acelp_reorder_lsf() */
168		5190	ff_set_min_dist_lsf(lsfnew, LSFQ_DIFF_MIN, LP_FILTER_ORDER - 1);
169	✗✓	5190	lsfnew[9] = FFMIN(lsfnew[LP_FILTER_ORDER - 1], 1.3 * M_PI);
170
171		5190	memcpy(lsf_history, lsf_tmp, LP_FILTER_ORDER * sizeof(*lsf_history));
172
173	✓✓	51900	for (i = 0; i < LP_FILTER_ORDER - 1; i++)
174		46710	lsfnew[i] = cos(lsfnew[i]);
175		5190	lsfnew[LP_FILTER_ORDER - 1] *= 6.153848 / M_PI;
176		5190	}
177
178			/** Apply pitch lag to the fixed vector (AMR section 6.1.2). */
179		16918	static void pitch_sharpening(int pitch_lag_int, float beta,
180			float *fixed_vector)
181			{
182			int i;
183
184	✓✓	88197	for (i = pitch_lag_int; i < SUBFR_SIZE; i++)
185		71279	fixed_vector[i] += beta * fixed_vector[i - pitch_lag_int];
186		16918	}
187
188			/**
189			* Extract decoding parameters from the input bitstream.
190			* @param parms parameters structure
191			* @param pgb pointer to initialized GetBitContext structure
192			*/
193		8441	static void decode_parameters(SiprParameters* parms, GetBitContext *pgb,
194			const SiprModeParam *p)
195			{
196			int i, j;
197
198	✓✓	8441	if (p->ma_predictor_bits)
199		3251	parms->ma_pred_switch = get_bits(pgb, p->ma_predictor_bits);
200
201	✓✓	50646	for (i = 0; i < 5; i++)
202		42205	parms->vq_indexes[i] = get_bits(pgb, p->vq_indexes_bits[i]);
203
204	✓✓	31861	for (i = 0; i < p->subframe_count; i++) {
205		23420	parms->pitch_delay[i] = get_bits(pgb, p->pitch_delay_bits[i]);
206	✓✓	23420	if (p->gp_index_bits)
207		6502	parms->gp_index[i] = get_bits(pgb, p->gp_index_bits);
208
209	✓✓	132454	for (j = 0; j < p->number_of_fc_indexes; j++)
210		109034	parms->fc_indexes[i][j] = get_bits(pgb, p->fc_index_bits[j]);
211
212		23420	parms->gc_index[i] = get_bits(pgb, p->gc_index_bits);
213			}
214		8441	}
215
216		5190	static void sipr_decode_lp(float lsfnew, const float lsfold, float *Az,
217			int num_subfr)
218			{
219			double lsfint[LP_FILTER_ORDER];
220			int i,j;
221		5190	float t, t0 = 1.0 / num_subfr;
222
223		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		169180	lsfint[j] = lsfold[j] * (1 - t) + t * lsfnew[j];
227
228		16918	ff_amrwb_lsp2lpc(lsfint, Az, LP_FILTER_ORDER);
229		16918	Az += LP_FILTER_ORDER;
230		16918	t += t0;
231			}
232		5190	}
233
234			/**
235			* Evaluate the adaptive impulse response.
236			*/
237		16918	static void eval_ir(const float Az, int pitch_lag, float freq,
238			float pitch_sharp_factor)
239			{
240			float tmp1[SUBFR_SIZE+1], tmp2[LP_FILTER_ORDER+1];
241			int i;
242
243		16918	tmp1[0] = 1.0;
244	✓✓	186098	for (i = 0; i < LP_FILTER_ORDER; i++) {
245		169180	tmp1[i+1] = Az[i] * ff_pow_0_55[i];
246		169180	tmp2[i ] = Az[i] * ff_pow_0_7 [i];
247			}
248		16918	memset(tmp1 + 11, 0, 37 * sizeof(float));
249
250		16918	ff_celp_lp_synthesis_filterf(freq, tmp2, tmp1, SUBFR_SIZE,
251			LP_FILTER_ORDER);
252
253		16918	pitch_sharpening(pitch_lag, pitch_sharp_factor, freq);
254		16918	}
255
256			/**
257			* Evaluate the convolution of a vector with a sparse vector.
258			*/
259		16918	static void convolute_with_sparse(float out, const AMRFixed pulses,
260			const float *shape, int length)
261			{
262			int i, j;
263
264		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		1579408	out[j] += pulses->y[i] * shape[j - pulses->x[i]];
268		16918	}
269
270			/**
271			* Apply postfilter, very similar to AMR one.
272			*/
273		3370	static void postfilter_5k0(SiprContext ctx, const float lpc, float *samples)
274			{
275			float buf[SUBFR_SIZE + LP_FILTER_ORDER];
276		3370	float *pole_out = buf + LP_FILTER_ORDER;
277			float lpc_n[LP_FILTER_ORDER];
278			float lpc_d[LP_FILTER_ORDER];
279			int i;
280
281	✓✓	37070	for (i = 0; i < LP_FILTER_ORDER; i++) {
282		33700	lpc_d[i] = lpc[i] * ff_pow_0_75[i];
283		33700	lpc_n[i] = lpc[i] * ff_pow_0_5 [i];
284			};
285
286		3370	memcpy(pole_out - LP_FILTER_ORDER, ctx->postfilter_mem,
287			LP_FILTER_ORDER*sizeof(float));
288
289		3370	ff_celp_lp_synthesis_filterf(pole_out, lpc_d, samples, SUBFR_SIZE,
290			LP_FILTER_ORDER);
291
292		3370	memcpy(ctx->postfilter_mem, pole_out + SUBFR_SIZE - LP_FILTER_ORDER,
293			LP_FILTER_ORDER*sizeof(float));
294
295		3370	ff_tilt_compensation(&ctx->tilt_mem, 0.4, pole_out, SUBFR_SIZE);
296
297		3370	memcpy(pole_out - LP_FILTER_ORDER, ctx->postfilter_mem5k0,
298			LP_FILTER_ORDERsizeof(pole_out));
299
300		3370	memcpy(ctx->postfilter_mem5k0, pole_out + SUBFR_SIZE - LP_FILTER_ORDER,
301			LP_FILTER_ORDERsizeof(pole_out));
302
303		3370	ff_celp_lp_zero_synthesis_filterf(samples, lpc_n, pole_out, SUBFR_SIZE,
304			LP_FILTER_ORDER);
305
306		3370	}
307
308		16918	static void decode_fixed_sparse(AMRFixed fixed_sparse, const int16_t pulses,
309			SiprMode mode, int low_gain)
310			{
311			int i;
312
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			}
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[2i ] = 3 ((pulses[i] >> 4) & 0xf) + i;
324		10386	fixed_sparse->x[2i + 1] = 3 ( pulses[i] & 0xf) + i;
325
326	✓✓	10386	fixed_sparse->y[2*i ] = (pulses[i] & 0x100) ? -1.0: 1.0;
327
328		10386	fixed_sparse->y[2*i + 1] =
329		10386	(fixed_sparse->x[2i + 1] < fixed_sparse->x[2i]) ?
330	✓✓	10386	-fixed_sparse->y[2i ] : fixed_sparse->y[2i];
331			}
332
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
341	✓✓	7816	for (i = 0; i < 3; i++) {
342		5862	int index = (val & 0x7) * 6 + 4 - i*2;
343
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 + iLP_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			};