61 lines
1.4 KiB
C++
61 lines
1.4 KiB
C++
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#include "main.h"
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#include "AudioLayer.h"
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unsigned long AudioFormat::AudioSamplesToMilliseconds(unsigned long samples)
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{
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return MulDiv(samples, 1000, SampleRate());
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}
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unsigned long AudioFormat::AudioBytesToMilliseconds(unsigned long bytes)
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{
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return MulDiv(AudioBytesToSamples(bytes), 1000, SampleRate());
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}
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unsigned long AudioFormat::AudioMillisecondsToBytes(DWORD milliseconds)
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{
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return AudioSamplesToBytes(MulDiv(milliseconds, SampleRate(), 1000));
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}
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unsigned long AudioFormat::AudioDurationToBytes(QWORD duration)
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{
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// TODO: potential integer overflow
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return AudioSamplesToBytes(MulDiv((int)duration, SampleRate(), 1000*10000));
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}
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unsigned long AudioFormat::AudioBytesToSamples(unsigned long bytes)
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{
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return bytes / waveFormat->Format.nBlockAlign;
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}
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unsigned long AudioFormat::AudioSamplesToBytes(unsigned long samples)
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{
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return samples * waveFormat->Format.nBlockAlign;
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}
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long AudioFormat::Channels()
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{
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return waveFormat->Format.nChannels;
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}
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long AudioFormat::ValidBits()
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{
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if (waveFormat->Format.wFormatTag == WAVE_FORMAT_PCM)
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{
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return waveFormat->Format.wBitsPerSample;
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}
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if (waveFormat->Format.wFormatTag == WAVE_FORMAT_EXTENSIBLE)
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{
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return waveFormat->Samples.wValidBitsPerSample;
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}
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return 0;
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}
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long AudioFormat::BitSize()
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{
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return waveFormat->Format.wBitsPerSample;
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}
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long AudioFormat::SampleRate()
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{
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return waveFormat->Format.nSamplesPerSec;
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}
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