GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/mlp_parse.h Lines: 14 14 100.0 %
Date: 2019-11-18 18:00:01 Branches: 8 8 100.0 %

Line Branch Exec Source
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/*
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 * Copyright (c) 2007 Ian Caulfield
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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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#ifndef AVCODEC_MLP_PARSE_H
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#define AVCODEC_MLP_PARSE_H
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#include "get_bits.h"
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typedef struct MLPHeaderInfo
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{
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    int stream_type;                        ///< 0xBB for MLP, 0xBA for TrueHD
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    int header_size;                        ///< Size of the major sync header, in bytes
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    int group1_bits;                        ///< The bit depth of the first substream
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    int group2_bits;                        ///< Bit depth of the second substream (MLP only)
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    int group1_samplerate;                  ///< Sample rate of first substream
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    int group2_samplerate;                  ///< Sample rate of second substream (MLP only)
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    int channel_arrangement;
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    int channel_modifier_thd_stream0;       ///< Channel modifier for substream 0 of TrueHD streams ("2-channel presentation")
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    int channel_modifier_thd_stream1;       ///< Channel modifier for substream 1 of TrueHD streams ("6-channel presentation")
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    int channel_modifier_thd_stream2;       ///< Channel modifier for substream 2 of TrueHD streams ("8-channel presentation")
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    int channels_mlp;                       ///< Channel count for MLP streams
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    int channels_thd_stream1;               ///< Channel count for substream 1 of TrueHD streams ("6-channel presentation")
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    int channels_thd_stream2;               ///< Channel count for substream 2 of TrueHD streams ("8-channel presentation")
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    uint64_t channel_layout_mlp;            ///< Channel layout for MLP streams
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    uint64_t channel_layout_thd_stream1;    ///< Channel layout for substream 1 of TrueHD streams ("6-channel presentation")
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    uint64_t channel_layout_thd_stream2;    ///< Channel layout for substream 2 of TrueHD streams ("8-channel presentation")
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    int access_unit_size;                   ///< Number of samples per coded frame
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    int access_unit_size_pow2;              ///< Next power of two above number of samples per frame
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    int is_vbr;                             ///< Stream is VBR instead of CBR
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    int peak_bitrate;                       ///< Peak bitrate for VBR, actual bitrate (==peak) for CBR
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    int num_substreams;                     ///< Number of substreams within stream
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} MLPHeaderInfo;
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static const uint8_t thd_chancount[13] = {
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//  LR    C   LFE  LRs LRvh  LRc LRrs  Cs   Ts  LRsd  LRw  Cvh  LFE2
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     2,   1,   1,   2,   2,   2,   2,   1,   1,   2,   2,   1,   1
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};
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static const uint64_t thd_layout[13] = {
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    AV_CH_FRONT_LEFT|AV_CH_FRONT_RIGHT,                     // LR
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    AV_CH_FRONT_CENTER,                                     // C
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    AV_CH_LOW_FREQUENCY,                                    // LFE
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    AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT,                       // LRs
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    AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT,             // LRvh
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    AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER, // LRc
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    AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT,                       // LRrs
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    AV_CH_BACK_CENTER,                                      // Cs
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    AV_CH_TOP_CENTER,                                       // Ts
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    AV_CH_SURROUND_DIRECT_LEFT|AV_CH_SURROUND_DIRECT_RIGHT, // LRsd
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    AV_CH_WIDE_LEFT|AV_CH_WIDE_RIGHT,                       // LRw
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    AV_CH_TOP_FRONT_CENTER,                                 // Cvh
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    AV_CH_LOW_FREQUENCY_2,                                  // LFE2
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};
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static inline int mlp_samplerate(int in)
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{
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    if (in == 0xF)
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        return 0;
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    return (in & 8 ? 44100 : 48000) << (in & 7) ;
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}
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static inline int truehd_channels(int chanmap)
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{
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    int channels = 0, i;
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    for (i = 0; i < 13; i++)
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        channels += thd_chancount[i] * ((chanmap >> i) & 1);
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    return channels;
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}
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static inline uint64_t truehd_layout(int chanmap)
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{
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    int i;
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    uint64_t layout = 0;
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    for (i = 0; i < 13; i++)
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        layout |= thd_layout[i] * ((chanmap >> i) & 1);
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    return layout;
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}
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int ff_mlp_read_major_sync(void *log, MLPHeaderInfo *mh, GetBitContext *gb);
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#endif /* AVCODEC_MLP_PARSE_H */