72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
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/*
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Audio File Library
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Copyright (C) 2010, Michael Pruett <michael@68k.org>
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This library 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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This library 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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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301 USA
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*/
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#ifndef AUDIOFORMAT_H
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#define AUDIOFORMAT_H
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#include "aupvlist.h"
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#include <sys/types.h>
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#include <string>
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struct PCMInfo
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{
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double slope, intercept, minClip, maxClip;
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};
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struct AudioFormat
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{
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double sampleRate; /* sampling rate in Hz */
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int sampleFormat; /* AF_SAMPFMT_... */
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int sampleWidth; /* sample width in bits */
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int byteOrder; /* AF_BYTEORDER_... */
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PCMInfo pcm; /* parameters of PCM data */
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int channelCount; /* number of channels */
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int compressionType; /* AF_COMPRESSION_... */
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AUpvlist compressionParams; /* NULL if no compression */
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bool packed : 1;
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size_t framesPerPacket;
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size_t bytesPerPacket;
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size_t bytesPerSample(bool stretch3to4) const;
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size_t bytesPerFrame(bool stretch3to4) const;
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size_t bytesPerSample() const;
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size_t bytesPerFrame() const;
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bool isInteger() const;
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bool isSigned() const;
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bool isUnsigned() const;
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bool isFloat() const;
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bool isCompressed() const;
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bool isUncompressed() const;
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bool isPacked() const { return packed; }
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bool isByteOrderSignificant() const { return sampleWidth > 8; }
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void computeBytesPerPacketPCM();
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std::string description() const;
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};
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#endif
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