133 lines
3.3 KiB
C
133 lines
3.3 KiB
C
/*
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* Copyright (C) 2013 Glyptodon LLC
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef __GUAC_WAV_ENCODER_H
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#define __GUAC_WAV_ENCODER_H
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#include "config.h"
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#include "audio.h"
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typedef struct wav_encoder_riff_header {
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/**
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* The RIFF chunk header, normally the string "RIFF".
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*/
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unsigned char chunk_id[4];
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/**
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* Size of the entire file, not including chunk_id or chunk_size.
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*/
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unsigned char chunk_size[4];
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/**
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* The format of this file, normally the string "WAVE".
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*/
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unsigned char chunk_format[4];
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} wav_encoder_riff_header;
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typedef struct wav_encoder_fmt_header {
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/**
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* ID of this subchunk. For the fmt subchunk, this should be "fmt ".
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*/
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unsigned char subchunk_id[4];
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/**
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* The size of the rest of this subchunk. For PCM, this will be 16.
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*/
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unsigned char subchunk_size[4];
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/**
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* Format of this subchunk. For PCM, this will be 1.
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*/
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unsigned char subchunk_format[2];
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/**
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* The number of channels in the PCM data.
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*/
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unsigned char subchunk_channels[2];
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/**
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* The sample rate of the PCM data.
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*/
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unsigned char subchunk_sample_rate[4];
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/**
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* The sample rate of the PCM data in bytes per second.
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*/
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unsigned char subchunk_byte_rate[4];
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/**
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* The number of bytes per sample.
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*/
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unsigned char subchunk_block_align[2];
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/**
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* The number of bits per sample.
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*/
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unsigned char subchunk_bps[2];
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} wav_encoder_fmt_header;
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typedef struct wav_encoder_state {
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/**
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* Arbitrary PCM data available for writing when the overall WAV is
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* flushed.
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*/
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unsigned char* data_buffer;
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/**
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* The number of bytes currently present in the data buffer.
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*/
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int used;
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/**
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* The total number of bytes that can be written into the data buffer
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* without requiring resizing.
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*/
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int length;
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} wav_encoder_state;
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typedef struct wav_encoder_data_header {
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/**
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* ID of this subchunk. For the data subchunk, this should be "data".
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*/
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unsigned char subchunk_id[4];
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/**
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* The number of bytes in the PCM data.
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*/
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unsigned char subchunk_size[4];
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} wav_encoder_data_header;
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extern guac_audio_encoder* wav_encoder;
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#endif
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