protected override bool LoadAudioFile(string audioFile, DirectSound directSound)
{
try
{
// Open the wave file in binary.
var reader = new BinaryReader(File.OpenRead(SystemConfiguration.DataFilePath + audioFile));
// Read in the wave file header.
chunkId = new string(reader.ReadChars(4));
chunkSize = reader.ReadInt32();
format = new string(reader.ReadChars(4));
subChunkId = new string(reader.ReadChars(4));
subChunkSize = reader.ReadInt32();
audioFormat = (WaveFormatEncoding )reader.ReadInt16();
numChannels = reader.ReadInt16();
sampleRate = reader.ReadInt32();
bytesPerSecond = reader.ReadInt32();
blockAlign = reader.ReadInt16();
bitsPerSample = reader.ReadInt16();
dataChunkId = new string(reader.ReadChars(4));
dataSize = reader.ReadInt32();
// Check that the chunk ID is the RIFF format
// and the file format is the WAVE format
// and sub chunk ID is the fmt format
// and the audio format is PCM
// and the wave file was recorded in stereo format
// and at a sample rate of 44.1 KHz
// and at 16 bit format
// and there is the data chunk header.
// Otherwise return false.
if (chunkId != "RIFF" || format != "WAVE" || subChunkId.Trim() != "fmt" || audioFormat != WaveFormatEncoding.Pcm || numChannels != 2 || sampleRate != 44100 || bitsPerSample != 16 || dataChunkId != "data")
return false;
// Set the buffer description of the secondary sound buffer that the wave file will be loaded onto and the wave format.
var buffer = new SoundBufferDescription();
buffer.Flags = BufferFlags.ControlVolume;
buffer.BufferBytes = dataSize;
buffer.Format = new WaveFormat(44100, 16, 2);
buffer.AlgorithmFor3D = Guid.Empty;
// Create a temporary sound buffer with the specific buffer settings.
_SecondaryBuffer = new SecondarySoundBuffer(directSound, buffer);
// Read in the wave file data into the temporary buffer.
var waveData = reader.ReadBytes(dataSize);
// Close the reader
reader.Close();
// Lock the secondary buffer to write wave data into it.
DataStream waveBufferData2;
var waveBufferData1 = _SecondaryBuffer.Lock(0, dataSize, LockFlags.None, out waveBufferData2);
// Copy the wave data into the buffer.
waveBufferData1.Write(waveData, 0, dataSize);
// Unlock the secondary buffer after the data has been written to it.
var result = _SecondaryBuffer.Unlock(waveBufferData1, waveBufferData2);
if (result != Result.Ok)
return false;
}
catch
{
return false;
}
return true;
}
static void Main(string[] args)
{
DirectSound directSound = new DirectSound();
var form = new Form();
form.Text = "SharpDX - DirectSound Demo";
// Set Cooperative Level to PRIORITY (priority level can call the SetFormat and Compact methods)
//
directSound.SetCooperativeLevel(form.Handle, CooperativeLevel.Priority);
// Create PrimarySoundBuffer
var primaryBufferDesc = new SoundBufferDescription();
primaryBufferDesc.Flags = BufferFlags.PrimaryBuffer;
primaryBufferDesc.AlgorithmFor3D = Guid.Empty;
var primarySoundBuffer = new PrimarySoundBuffer(directSound, primaryBufferDesc);
// Play the PrimarySound Buffer
primarySoundBuffer.Play(0, PlayFlags.Looping);
// Default WaveFormat Stereo 44100 16 bit
WaveFormat waveFormat = new WaveFormat();
// Create SecondarySoundBuffer
var secondaryBufferDesc = new SoundBufferDescription();
secondaryBufferDesc.BufferBytes = waveFormat.ConvertLatencyToByteSize(60000);
secondaryBufferDesc.Format = waveFormat;
secondaryBufferDesc.Flags = BufferFlags.GetCurrentPosition2 | BufferFlags.ControlPositionNotify | BufferFlags.GlobalFocus |
BufferFlags.ControlVolume | BufferFlags.StickyFocus;
secondaryBufferDesc.AlgorithmFor3D = Guid.Empty;
var secondarySoundBuffer = new SecondarySoundBuffer(directSound, secondaryBufferDesc);
// Get Capabilties from secondary sound buffer
var capabilities = secondarySoundBuffer.Capabilities;
// Lock the buffer
DataStream dataPart2;
var dataPart1 =secondarySoundBuffer.Lock(0, capabilities.BufferBytes, LockFlags.EntireBuffer, out dataPart2);
// Fill the buffer with some sound
int numberOfSamples = capabilities.BufferBytes/waveFormat.BlockAlign;
for (int i = 0; i < numberOfSamples; i++)
{
double vibrato = Math.Cos(2 * Math.PI * 10.0 * i /waveFormat.SampleRate);
short value = (short) (Math.Cos(2*Math.PI*(220.0 + 4.0 * vibrato)*i/waveFormat.SampleRate)*16384); // Not too loud
dataPart1.Write(value);
dataPart1.Write(value);
}
// Unlock the buffer
secondarySoundBuffer.Unlock(dataPart1, dataPart2);
// Play the song
secondarySoundBuffer.Play(0, PlayFlags.Looping);
Application.Run(form);
}