GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/opusdsp.c Lines: 27 27 100.0 %
Date: 2019-11-22 03:34:36 Branches: 4 4 100.0 %

Line Branch Exec Source
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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 "opusdsp.h"
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static void postfilter_c(float *data, int period, float *gains, int len)
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{
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    const float g0 = gains[0];
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    const float g1 = gains[1];
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    const float g2 = gains[2];
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    float x4 = data[-period - 2];
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    float x3 = data[-period - 1];
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    float x2 = data[-period + 0];
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    float x1 = data[-period + 1];
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    for (int i = 0; i < len; i++) {
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        float x0 = data[i - period + 2];
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        data[i] += g0 * x2        +
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                   g1 * (x1 + x3) +
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                   g2 * (x0 + x4);
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        x4 = x3;
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        x3 = x2;
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        x2 = x1;
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        x1 = x0;
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    }
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}
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static float deemphasis_c(float *y, float *x, float coeff, int len)
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{
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    for (int i = 0; i < len; i++)
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        coeff = y[i] = x[i] + coeff*CELT_EMPH_COEFF;
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    return coeff;
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}
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av_cold void ff_opus_dsp_init(OpusDSP *ctx)
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{
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    ctx->postfilter = postfilter_c;
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    ctx->deemphasis = deemphasis_c;
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    if (ARCH_X86)
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        ff_opus_dsp_init_x86(ctx);
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    if (ARCH_AARCH64)
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        ff_opus_dsp_init_aarch64(ctx);
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}