/// <summary>
/// Performs initialization steps by providing the audio stream parameters.
/// </summary>
/// <param name="channelCount">The number of channels of current <see cref="SoundStream"/> object.</param>
/// <param name="sampleRate">The sample rate, in samples per second.</param>
protected virtual void Initialize(int channelCount, int sampleRate)
{
// Reset the current states
_channelCount = channelCount;
_sampleRate = sampleRate;
_processed = 0;
_isStreaming = false;
// Deduce the format from the number of channels
_format = AudioDevice.GetFormat(channelCount);
// Check if the format is valid
if (_format == 0)
{
throw new NotSupportedException("The specified number of channels (" + _channelCount.ToString() + ") is not supported.");
}
}
private void Update(int channelCount, int sampleRate)
{
// Check parameters
if (channelCount <= 0 || sampleRate <= 0)
{
throw new ArgumentException();
}
// Find the best format according to the number of channels
var format = AudioDevice.GetFormat(channelCount);
if (format == 0)
{
throw new Exception("Failed to load sound buffer (unsupported number of channels: " + channelCount.ToString() + ")");
}
// First make a copy of the list of sounds so we can reattach later
var sounds = new List <Sound>(_sounds);
// Detach the buffer from the sounds that use it (to avoid OpenAL errors)
foreach (var sound in sounds)
{
sound.ResetBuffer();
}
// fill the buffer
int size = _samples.Length * sizeof(short);
ALChecker.Check(() => AL.BufferData(_buffer, format, _samples, size, sampleRate));
// Compute the duration
_duration = TimeSpan.FromSeconds((float)_samples.Length / sampleRate / channelCount);
// Now reattach the buffer to the sounds that use it
foreach (var sound in sounds)
{
sound.Buffer = this;
}
}