/// <summary>
/// Reads a WAV file.
/// </summary>
/// <param name="stream">
/// The stream to be read.
/// </param>
/// <param name="format">
/// The format of the WAV file.
/// </param>
/// <param name="data">
/// The WAV file data.
/// </param>
/// <param name="size">
/// The size of the WAV file data.
/// </param>
/// <param name="frequency">
/// The frequency of the WAV file.
/// </param>
/// <param name="loop">
/// Does the WAV file loop?
/// </param>
private static void ReadWavFile(Stream stream, out int format, out byte[] data, out int size, out int frequency, out int loop)
{
bool success = true;
format = Al.AL_FORMAT_MONO16;
data = null;
size = 0;
frequency = 22050;
loop = Al.AL_FALSE;
BinaryReader reader = new BinaryReader(stream, System.Text.Encoding.ASCII);
try {
WavFileHeader fileHeader = new WavFileHeader();
WavChunkHeader chunkHeader = new WavChunkHeader();
WavFormatChunk formatChunk = new WavFormatChunk();
// Read WAV file header
fileHeader.Id = reader.ReadChars(4);
fileHeader.Length = reader.ReadInt32();
fileHeader.Type = reader.ReadChars(4);
if (new string(fileHeader.Id) != "RIFF" && fileHeader.Length <= 0 && new string(fileHeader.Type) != "WAVE")
{
success = false;
}
else
{
while (fileHeader.Length > 8)
{
// Read WAV chunk header
chunkHeader.Id = reader.ReadChars(4);
chunkHeader.Length = reader.ReadInt32();
// Determine chunk action
if (new string(chunkHeader.Id) == "fmt ")
{
// Read WAV format header
formatChunk.Format = reader.ReadInt16();
formatChunk.Channels = reader.ReadInt16();
formatChunk.SamplesPerSecond = reader.ReadInt32();
formatChunk.BytesPerSecond = reader.ReadInt32();
formatChunk.BytesPerSample = reader.ReadInt16();
formatChunk.BitsPerSample = reader.ReadInt16();
if (chunkHeader.Length > 16)
{
formatChunk.ExtraBytesLength = reader.ReadInt16();
formatChunk.ExtraBytes = reader.ReadBytes(formatChunk.ExtraBytesLength);
}
else
{
formatChunk.ExtraBytesLength = 0;
formatChunk.ExtraBytes = null;
}
if (formatChunk.Format == 0x0001)
{
if (formatChunk.Channels == 1)
{
if (formatChunk.BitsPerSample == 8)
{
format = Al.AL_FORMAT_MONO8;
}
else
{
format = Al.AL_FORMAT_MONO16;
}
}
else
{
if (formatChunk.BitsPerSample == 8)
{
format = Al.AL_FORMAT_STEREO8;
}
else
{
format = Al.AL_FORMAT_STEREO16;
}
}
}
frequency = formatChunk.SamplesPerSecond;
}
else if (new string(chunkHeader.Id) == "data")
{
if (formatChunk.Format == 0x0001)
{
size = chunkHeader.Length - 8;
data = reader.ReadBytes(size);
}
}
else
{
if (chunkHeader.Length <= fileHeader.Length && chunkHeader.Length > 0)
{
reader.ReadBytes(chunkHeader.Length);
}
}
if (chunkHeader.Length <= fileHeader.Length && chunkHeader.Length > 0)
{
fileHeader.Length -= chunkHeader.Length;
}
else
{
fileHeader.Length = 0;
}
}
}
success = true;
}
catch {
success = false;
}
finally {
reader.Close();
}
if (!success)
{
format = -1;
data = null;
size = -1;
frequency = -1;
loop = -1;
}
}
/// <summary>
/// Reads a WAV file.
/// </summary>
/// <param name="stream">
/// The stream to be read.
/// </param>
/// <param name="format">
/// The format of the WAV file.
/// </param>
/// <param name="data">
/// The WAV file data.
/// </param>
/// <param name="size">
/// The size of the WAV file data.
/// </param>
/// <param name="frequency">
/// The frequency of the WAV file.
/// </param>
/// <param name="loop">
/// Does the WAV file loop?
/// </param>
private static void ReadWavFile(Stream stream, out int format, out byte[] data, out int size, out int frequency, out int loop)
{
bool success = true;
format = Al.AL_FORMAT_MONO16;
data = null;
size = 0;
frequency = 22050;
loop = Al.AL_FALSE;
BinaryReader reader = new BinaryReader(stream, System.Text.Encoding.ASCII);
try {
WavFileHeader fileHeader = new WavFileHeader();
WavChunkHeader chunkHeader = new WavChunkHeader();
WavFormatChunk formatChunk = new WavFormatChunk();
// Read WAV file header
fileHeader.Id = reader.ReadChars(4);
fileHeader.Length = reader.ReadInt32();
fileHeader.Type = reader.ReadChars(4);
if(new string(fileHeader.Id) != "RIFF" && fileHeader.Length <= 0 && new string(fileHeader.Type) != "WAVE") {
success = false;
}
else {
while(fileHeader.Length > 8) {
// Read WAV chunk header
chunkHeader.Id = reader.ReadChars(4);
chunkHeader.Length = reader.ReadInt32();
// Determine chunk action
if(new string(chunkHeader.Id) == "fmt ") {
// Read WAV format header
formatChunk.Format = reader.ReadInt16();
formatChunk.Channels = reader.ReadInt16();
formatChunk.SamplesPerSecond = reader.ReadInt32();
formatChunk.BytesPerSecond = reader.ReadInt32();
formatChunk.BytesPerSample = reader.ReadInt16();
formatChunk.BitsPerSample = reader.ReadInt16();
if(chunkHeader.Length > 16) {
formatChunk.ExtraBytesLength = reader.ReadInt16();
formatChunk.ExtraBytes = reader.ReadBytes(formatChunk.ExtraBytesLength);
}
else {
formatChunk.ExtraBytesLength = 0;
formatChunk.ExtraBytes = null;
}
if(formatChunk.Format == 0x0001) {
if(formatChunk.Channels == 1) {
if(formatChunk.BitsPerSample == 8) {
format = Al.AL_FORMAT_MONO8;
}
else {
format = Al.AL_FORMAT_MONO16;
}
}
else {
if(formatChunk.BitsPerSample == 8) {
format = Al.AL_FORMAT_STEREO8;
}
else {
format = Al.AL_FORMAT_STEREO16;
}
}
}
frequency = formatChunk.SamplesPerSecond;
}
else if(new string(chunkHeader.Id) == "data") {
if(formatChunk.Format == 0x0001) {
size = chunkHeader.Length - 8;
data = reader.ReadBytes(size);
}
}
else {
if(chunkHeader.Length <= fileHeader.Length && chunkHeader.Length > 0) {
reader.ReadBytes(chunkHeader.Length);
}
}
if(chunkHeader.Length <= fileHeader.Length && chunkHeader.Length > 0) {
fileHeader.Length -= chunkHeader.Length;
}
else {
fileHeader.Length = 0;
}
}
}
success = true;
}
catch {
success = false;
}
finally {
reader.Close();
}
if(!success) {
format = -1;
data = null;
size = -1;
frequency = -1;
loop = -1;
}
}
