53 lines
2 KiB
C
53 lines
2 KiB
C
/* Copyright (C)2012 Xiph.Org Foundation
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File: opus_header.h
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef OPUS_HEADER_H
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#define OPUS_HEADER_H
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#include "ogg/ogg.h"
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#define OPUS_DEMIXING_MATRIX_SIZE_MAX (18 * 18 * 2)
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typedef struct {
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int version;
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int channels; /* Number of channels: 1..255 */
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int preskip;
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ogg_uint32_t input_sample_rate;
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int gain; /* in dB S7.8 should be zero whenever possible */
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int channel_mapping;
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/* The rest is only used if channel_mapping != 0 */
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int nb_streams;
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int nb_coupled;
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unsigned char stream_map[255];
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unsigned char dmatrix[OPUS_DEMIXING_MATRIX_SIZE_MAX];
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} OpusHeader;
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int opus_header_parse(const unsigned char *header, int len, OpusHeader *h);
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extern const int wav_permute_matrix[8][8];
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#endif
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