GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/wma_common.c Lines: 12 19 63.2 %
Date: 2020-10-23 17:01:47 Branches: 10 22 45.5 %

Line Branch Exec Source
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/*
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 * common code shared by all WMA variants
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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 "libavutil/attributes.h"
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#include "wma_common.h"
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/**
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 *@brief Get the samples per frame for this stream.
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 *@param sample_rate output sample_rate
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 *@param version wma version
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 *@param decode_flags codec compression features
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 *@return log2 of the number of output samples per frame
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 */
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av_cold int ff_wma_get_frame_len_bits(int sample_rate, int version,
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                                      unsigned int decode_flags)
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{
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    int frame_len_bits;
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    if (sample_rate <= 16000)
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        frame_len_bits = 9;
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    else if (sample_rate <= 22050 || (sample_rate <= 32000 && version == 1))
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        frame_len_bits = 10;
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    else if (sample_rate <= 48000 || version < 3)
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        frame_len_bits = 11;
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    else if (sample_rate <= 96000)
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        frame_len_bits = 12;
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    else
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        frame_len_bits = 13;
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    if (version == 3) {
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        int tmp = decode_flags & 0x6;
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        if (tmp == 0x2)
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            ++frame_len_bits;
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        else if (tmp == 0x4)
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            --frame_len_bits;
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        else if (tmp == 0x6)
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            frame_len_bits -= 2;
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    }
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    return frame_len_bits;
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}