public static SDL_AudioFormat FirstAudioFormat(this SDL_AudioFormat format)
{
for (_formatIdx = 0; _formatIdx < _formatList.Length; ++_formatIdx)
{
if (_formatList[_formatIdx][0] == format)
{
break;
}
}
_formatIdxSub = 0;
return(NextAudioFormat());
}
public WaveFormatEx(SDL_AudioFormat format, int channels, int sampleRate)
: base(sampleRate, format.AUDIO_BITSIZE(), channels)
{
SDL_AudioFormat test_format = format.FirstAudioFormat();
bool valid_format = false;
while (!valid_format && test_format != 0)
{
switch (test_format)
{
case SDL_AudioFormat.U8:
case SDL_AudioFormat.S16:
case SDL_AudioFormat.S32:
case SDL_AudioFormat.F32:
format = test_format;
valid_format = true;
break;
}
test_format = format.NextAudioFormat();
}
if (!valid_format)
{
throw new NotSupportedException("XAudio2: Unsupported audio format");
}
switch (format)
{
case SDL_AudioFormat.U8:
Silence = 0x80;
break;
default:
Silence = 0x00;
break;
}
waveFormatTag = format.AUDIO_ISFLOAT() ? WaveFormatEncoding.IeeeFloat : WaveFormatEncoding.Pcm;
//bitsPerSample = (short)format.AUDIO_BITSIZE();
//this.channels = (short)channels;
//this.sampleRate = sampleRate;
//blockAlign = (short)(channels * (bitsPerSample / 8));
//averageBytesPerSecond = sampleRate * blockAlign;
extraSize = (short)Marshal.SizeOf <WAVEFORMATEX>();
}
public static SDL_AudioFormat NextAudioFormat(this SDL_AudioFormat useless) => NextAudioFormat();
public static bool AUDIO_ISUNSIGNED(this SDL_AudioFormat x) => !x.AUDIO_ISSIGNED();
public static bool AUDIO_ISLITTLEENDIAN(this SDL_AudioFormat x) => !x.AUDIO_ISBIGENDIAN();
public static bool AUDIO_ISINT(this SDL_AudioFormat x) => !x.AUDIO_ISFLOAT();
public static bool AUDIO_ISSIGNED(this SDL_AudioFormat x) => x.AND(AUDIO_MASK_SIGNED) != 0;
public static bool AUDIO_ISBIGENDIAN(this SDL_AudioFormat x) => x.AND(AUDIO_MASK_ENDIAN) != 0;
public static bool AUDIO_ISFLOAT(this SDL_AudioFormat x) => x.AND(AUDIO_MASK_DATATYPE) != 0;
public static int AUDIO_BITSIZE(this SDL_AudioFormat x) => x.AND(AUDIO_MASK_BITSIZE);
static int AND(this SDL_AudioFormat x, int y) => (int)x & y;
