GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/mpc.c Lines: 37 37 100.0 %
Date: 2019-11-18 18:00:01 Branches: 20 20 100.0 %

Line Branch Exec Source
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/*
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 * Musepack decoder core
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 * Copyright (c) 2006 Konstantin Shishkov
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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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/**
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 * @file
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 * Musepack decoder core
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 * MPEG Audio Layer 1/2 -like codec with frames of 1152 samples
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 * divided into 32 subbands.
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 */
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#include "libavutil/attributes.h"
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#include "avcodec.h"
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#include "mpegaudiodsp.h"
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#include "mpegaudio.h"
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#include "mpc.h"
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#include "mpcdata.h"
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4
av_cold void ff_mpc_init(void)
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{
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4
    ff_mpa_synth_init_fixed(ff_mpa_synth_window_fixed);
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}
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/**
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 * Process decoded Musepack data and produce PCM
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 */
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static void mpc_synth(MPCContext *c, int16_t **out, int channels)
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{
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456
    int dither_state = 0;
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    int i, ch;
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    for(ch = 0;  ch < channels; ch++){
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33744
        for(i = 0; i < SAMPLES_PER_BAND; i++) {
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32832
            ff_mpa_synth_filter_fixed(&c->mpadsp,
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32832
                                c->synth_buf[ch], &(c->synth_buf_offset[ch]),
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                                ff_mpa_synth_window_fixed, &dither_state,
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32832
                                out[ch] + 32 * i, 1,
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32832
                                c->sb_samples[ch][i]);
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        }
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    }
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456
}
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void ff_mpc_dequantize_and_synth(MPCContext * c, int maxband, int16_t **out,
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                                 int channels)
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{
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    int i, j, ch;
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456
    Band *bands = c->bands;
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    int off;
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    float mul;
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    /* dequantize */
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456
    memset(c->sb_samples, 0, sizeof(c->sb_samples));
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456
    off = 0;
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10870
    for(i = 0; i <= maxband; i++, off += SAMPLES_PER_BAND){
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31242
        for(ch = 0; ch < 2; ch++){
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            if(bands[i].res[ch]){
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18282
                j = 0;
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18282
                mul = (mpc_CC+1)[bands[i].res[ch]] * mpc_SCF[bands[i].scf_idx[ch][0] & 0xFF];
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237666
                for(; j < 12; j++)
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219384
                    c->sb_samples[ch][j][i] = mul * c->Q[ch][j + off];
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18282
                mul = (mpc_CC+1)[bands[i].res[ch]] * mpc_SCF[bands[i].scf_idx[ch][1] & 0xFF];
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237666
                for(; j < 24; j++)
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219384
                    c->sb_samples[ch][j][i] = mul * c->Q[ch][j + off];
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18282
                mul = (mpc_CC+1)[bands[i].res[ch]] * mpc_SCF[bands[i].scf_idx[ch][2] & 0xFF];
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237666
                for(; j < 36; j++)
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219384
                    c->sb_samples[ch][j][i] = mul * c->Q[ch][j + off];
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            }
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        }
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        if(bands[i].msf){
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            int t1, t2;
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226625
            for(j = 0; j < SAMPLES_PER_BAND; j++){
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220500
                t1 = c->sb_samples[0][j][i];
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220500
                t2 = c->sb_samples[1][j][i];
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220500
                c->sb_samples[0][j][i] = t1 + t2;
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220500
                c->sb_samples[1][j][i] = t1 - t2;
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            }
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        }
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    }
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456
    mpc_synth(c, out, channels);
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456
}