internal static unsafe void SetVolume(AudioStream *pThis, float volume)
{
OSStatus status = API.AudioQueueSetParameter(pThis->Queue, AudioQueueParameter.Volume, volume);
API.CheckStatus(status);
}
static unsafe void ReadBufferInternal(void *pUserData, AudioQueue *pQueue, AudioQueueBuffer *pBuffer)
{
AudioStream *pThis = (AudioStream *)pUserData;
if (pThis == null)
{
Console.WriteLine("ReadBufferProc: pThis is null");
}
if (!pThis->IsRunning)
{
return;
}
if (pQueue == null)
{
Console.WriteLine("ReadBufferProc: pQueue is null");
}
if (pBuffer == null)
{
Console.WriteLine("ReadBufferProc: pBuffer is null");
}
if (pBuffer->AudioData == null)
{
Console.WriteLine("ReadBufferProc: pBuffer->AudioData is null");
}
if (pBuffer->PacketDescriptors == null)
{
Console.WriteLine("ReadBufferProc: pBuffer->PacketDescriptors is null");
}
if (pThis->AudioFile == null)
{
Console.WriteLine("ReadBufferProc: pThis->AudioFile is null");
}
int numPacketsReadFromFile = pThis->NumPacketsToRead;
int numBytesReadFromFile = 0;
OSStatus status = API.AudioFileReadPackets(pThis->AudioFile, 0, &numBytesReadFromFile, pBuffer->PacketDescriptors, pThis->CurrentPacket, &numPacketsReadFromFile, pBuffer->AudioData);
API.CheckStatus(status);
if (status == 0 &&
numPacketsReadFromFile == 0 &&
pThis->Looping)
{
// we ran out of packets and they are
// asking to loop, so try and reset
pThis->CurrentPacket = 0;
numPacketsReadFromFile = pThis->NumPacketsToRead;
numBytesReadFromFile = 0;
status = API.AudioFileReadPackets(pThis->AudioFile, 0, &numBytesReadFromFile, pBuffer->PacketDescriptors, pThis->CurrentPacket, &numPacketsReadFromFile, pBuffer->AudioData);
API.CheckStatus(status);
}
if (numPacketsReadFromFile > 0)
{
pBuffer->AudioDataByteSize = numBytesReadFromFile;
pBuffer->PacketDescriptorCount = numPacketsReadFromFile;
status = API.AudioQueueEnqueueBuffer(pThis->Queue, pBuffer, (pBuffer->PacketDescriptors != null ? pBuffer->PacketDescriptorCount : 0), pBuffer->PacketDescriptors);
API.CheckStatus(status);
pThis->CurrentPacket += numPacketsReadFromFile;
}
else
{
status = API.AudioQueueStop(pThis->Queue, 0);
API.CheckStatus(status);
}
}
