72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
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// Copyright (C) 2002-2018 Nikolaus Gebhardt
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// This file is part of the "irrKlang" library.
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// For conditions of distribution and use, see copyright notice in irrKlang.h
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#ifndef __S_IRRKLANG_AUDIO_STREAM_FORMAT_H_INCLUDED__
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#define __S_IRRKLANG_AUDIO_STREAM_FORMAT_H_INCLUDED__
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#include "ik_IRefCounted.h"
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namespace irrklang
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{
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//! audio sample data format enumeration for supported formats
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enum ESampleFormat
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{
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//! one unsigned byte (0;255)
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ESF_U8,
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//! 16 bit, signed (-32k;32k)
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ESF_S16
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};
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//! structure describing an audio stream format with helper functions
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struct SAudioStreamFormat
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{
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//! channels, 1 for mono, 2 for stereo
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ik_s32 ChannelCount;
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//! amount of frames in the sample data or stream.
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/** If the stream has an unknown lenght, this is -1 */
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ik_s32 FrameCount;
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//! samples per second
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ik_s32 SampleRate;
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//! format of the sample data
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ESampleFormat SampleFormat;
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//! returns the size of a sample of the data described by the stream data in bytes
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inline ik_s32 getSampleSize() const
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{
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return (SampleFormat == ESF_U8) ? 1 : 2;
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}
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//! returns the frame size of the stream data in bytes
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inline ik_s32 getFrameSize() const
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{
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return ChannelCount * getSampleSize();
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}
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//! returns the size of the sample data in bytes
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/* Returns an invalid negative value when the stream has an unknown lenght */
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inline ik_s32 getSampleDataSize() const
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{
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return getFrameSize() * FrameCount;
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}
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//! returns amount of bytes per second
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inline ik_s32 getBytesPerSecond() const
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{
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return getFrameSize() * SampleRate;
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}
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};
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} // end namespace irrklang
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#endif
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