void PrepareExtAudioFile()
{
extAudioFile = ExtAudioFile.OpenUrl(url);
CheckValue(extAudioFile, "ExtAudioFile.OpenUrl failed");
srcFormat = extAudioFile.FileDataFormat;
// This is how you say,“When you convert the data, this is the format I’d like to receive.”
// The client data format must be PCM. In other words, you can’t use a single ExtAudioFile to convert between two compressed formats.
extAudioFile.ClientDataFormat = dstFormat;
// getting total frame
TotalFrames = extAudioFile.FileLengthFrames;
// Allocating AudioBufferList
buffer = new AudioBuffers(srcFormat.ChannelsPerFrame);
for (int i = 0; i < buffer.Count; ++i)
{
int size = (int)(sizeof(int) * TotalFrames);
buffer.SetData(i, Marshal.AllocHGlobal(size), size);
}
numberOfChannels = srcFormat.ChannelsPerFrame;
// Reading all frame into the buffer
ExtAudioFileError status;
extAudioFile.Read((uint)TotalFrames, buffer, out status);
if (status != ExtAudioFileError.OK)
{
throw new ApplicationException();
}
}
public static ExtAudioFile GetExtAudioFile(NSUrl url, out AudioStreamBasicDescription audioDescription)
{
// Notice the following line that we can not pass a NSUrl to a CFUrl
//ExtAudioFile ext = ExtAudioFile.OpenUrl(url);
// Basic Descriptions
AudioStreamBasicDescription fileFormat;
AudioStreamBasicDescription outputFormat;
// So now we create a CFUrl
CFUrl curl = CFUrl.FromFile(url.Path);
// Open the file
ExtAudioFile ext = ExtAudioFile.OpenUrl(curl);
// Get the audio format
fileFormat = ext.FileDataFormat;
// Don't know how to handle sounds with more than 2 channels (i.e. stereo)
// Remember that OpenAL sound effects must be mono to be spatialized anyway.
if (fileFormat.ChannelsPerFrame > 2)
{
#if DEBUG
Console.WriteLine("Unsupported Format: Channel count [0] is greater than stereo.", fileFormat.ChannelsPerFrame);
#endif
audioDescription = new AudioStreamBasicDescription();
return(null);
}
// The output format must be linear PCM because that's the only type OpenAL knows how to deal with.
// Set the client format to 16 bit signed integer (native-endian) data because that is the most
// optimal format on iPhone/iPod Touch hardware.
// Maintain the channel count and sample rate of the original source format.
outputFormat = new AudioStreamBasicDescription(); // Create our output format description to be converted to
outputFormat.SampleRate = fileFormat.SampleRate; // Preserve the original sample rate
outputFormat.ChannelsPerFrame = fileFormat.ChannelsPerFrame; // Preserve the orignal number of channels
outputFormat.Format = AudioFormatType.LinearPCM; // We want Linear PCM
// IsBigEndian is causing some problems with distorted sounds on MacOSX
// outputFormat.FormatFlags = AudioFormatFlags.IsBigEndian
// | AudioFormatFlags.IsPacked
// | AudioFormatFlags.IsSignedInteger;
outputFormat.FormatFlags = AudioFormatFlags.IsPacked
| AudioFormatFlags.IsSignedInteger;
outputFormat.FramesPerPacket = 1; // We know for linear PCM, the definition is 1 frame per packet
outputFormat.BitsPerChannel = 16; // We know we want 16-bit
outputFormat.BytesPerPacket = 2 * outputFormat.ChannelsPerFrame; // We know we are using 16-bit, so 2-bytes per channel per frame
outputFormat.BytesPerFrame = 2 * outputFormat.ChannelsPerFrame; // For PCM, since 1 frame is 1 packet, it is the same as mBytesPerPacket
// Set the desired client (output) data format
ext.ClientDataFormat = outputFormat;
// Copy the output format to the audio description that was passed in so the
// info will be returned to the user.
audioDescription = outputFormat;
return(ext);
}
public void ClientDataFormat()
{
var path = Path.GetFullPath(Path.Combine("AudioToolbox", "1.caf"));
using (var file = ExtAudioFile.OpenUrl(CFUrl.FromFile(path))) {
var fmt = file.ClientDataFormat;
}
}
public void ClientDataFormat()
{
var path = NSBundle.MainBundle.PathForResource("1", "caf", "AudioToolbox");
using (var file = ExtAudioFile.OpenUrl(CFUrl.FromFile(path))) {
var fmt = file.ClientDataFormat;
}
}
protected void LoadAudioFile(StreamInfoProvider info)
{
// get the path to the file
string path;
if (info.IsInternal)
{
path = NSBundle.MainBundle.PathForSoundResource(info.Uri);
}
else
{
// file path is the Uri for user sources
path = info.Uri;
}
using (var url = CFUrl.FromFile(path))
{
using (var file = ExtAudioFile.OpenUrl(url))
{
var clientFormat = file.FileDataFormat;
clientFormat.FormatFlags = AudioStreamBasicDescription.AudioFormatFlagsNativeFloat;
clientFormat.ChannelsPerFrame = 1;
clientFormat.FramesPerPacket = 1;
clientFormat.BitsPerChannel = 8 * sizeof(float);
clientFormat.BytesPerPacket =
clientFormat.BytesPerFrame = clientFormat.ChannelsPerFrame * sizeof(float);
file.ClientDataFormat = clientFormat;
double rateRatio = Metronome.SampleRate / clientFormat.SampleRate;
var numFrames = file.FileLengthFrames;
numFrames = (uint)(numFrames * rateRatio);
TotalFrames = numFrames;
UInt32 samples = (uint)(numFrames * clientFormat.ChannelsPerFrame);
var dataSize = (int)(sizeof(uint) * samples);
Data = Marshal.AllocHGlobal(dataSize);
// set up a AudioBufferList to read data into
var bufList = new AudioBuffers(1);
bufList[0] = new AudioBuffer
{
NumberChannels = 1,
Data = Data,
DataByteSize = dataSize
};
ExtAudioFileError error;
file.Read((uint)numFrames, bufList, out error);
if (error != ExtAudioFileError.OK)
{
throw new ApplicationException();
}
}
}
}
public void OpenCFUrlTest()
{
var path = Path.GetFullPath(Path.Combine("AudioToolbox", "1.caf"));
ExtAudioFileError err;
using (var file = ExtAudioFile.OpenUrl(CFUrl.FromFile(path), out err)) {
Assert.IsTrue(err == ExtAudioFileError.OK, "OpenCFUrlTest");
Assert.IsNotNull(file.AudioFile, "OpenCFUrlTest");
}
}
public void OpenCFUrlTest()
{
var path = NSBundle.MainBundle.PathForResource("1", "caf", "AudioToolbox");
ExtAudioFileError err;
using (var file = ExtAudioFile.OpenUrl(CFUrl.FromFile(path), out err)) {
Assert.IsTrue(err == ExtAudioFileError.OK, "OpenCFUrlTest");
Assert.IsNotNull(file.AudioFile, "OpenCFUrlTest");
}
}
public void WrapAudioFileID()
{
var path = Path.GetFullPath(Path.Combine("AudioToolbox", "1.caf"));
using (var file = ExtAudioFile.OpenUrl(CFUrl.FromFile(path))) {
Assert.IsNotNull(file.AudioFile, "#1");
ExtAudioFile f2;
Assert.AreEqual(ExtAudioFileError.OK, ExtAudioFile.WrapAudioFileID(file.AudioFile.Value, true, out f2));
}
}
public void WrapAudioFileID()
{
var path = NSBundle.MainBundle.PathForResource("1", "caf", "AudioToolbox");
using (var file = ExtAudioFile.OpenUrl(CFUrl.FromFile(path))) {
Assert.IsNotNull(file.AudioFile, "#1");
ExtAudioFile f2;
Assert.AreEqual(ExtAudioFileError.OK, ExtAudioFile.WrapAudioFileID(file.AudioFile.Value, true, out f2));
}
}
public void ClientDataFormat()
{
#if MONOMAC
var path = NSBundle.MainBundle.PathForResource("1", "caf", "AudioToolbox");
#else
var path = Path.GetFullPath(Path.Combine("AudioToolbox", "1.caf"));
#endif
using (var file = ExtAudioFile.OpenUrl(CFUrl.FromFile(path))) {
var fmt = file.ClientDataFormat;
}
}
public void OpenCFUrlTest()
{
#if MONOMAC
var path = NSBundle.MainBundle.PathForResource("1", "caf", "AudioToolbox");
#else
var path = Path.GetFullPath(Path.Combine("AudioToolbox", "1.caf"));
#endif
ExtAudioFileError err;
using (var file = ExtAudioFile.OpenUrl(CFUrl.FromFile(path), out err)) {
Assert.IsTrue(err == ExtAudioFileError.OK, "OpenCFUrlTest");
Assert.IsNotNull(file.AudioFile, "OpenCFUrlTest");
}
}
// load up audio data from the demo files into mSoundBuffer.data used in the render proc
void LoadFiles()
{
const int FilesCount = 2;
for (int i = 0; i < FilesCount; i++)
{
Debug.Print("Loading file #{0}", i);
using (var file = ExtAudioFile.OpenUrl(sourceURL [i])) {
var clientFormat = file.FileDataFormat;
clientFormat.FormatFlags = AudioStreamBasicDescription.AudioFormatFlagsNativeFloat;
clientFormat.ChannelsPerFrame = 1;
clientFormat.FramesPerPacket = 1;
clientFormat.BitsPerChannel = 8 * sizeof(int);
clientFormat.BytesPerPacket =
clientFormat.BytesPerFrame = clientFormat.ChannelsPerFrame * sizeof(int);
file.ClientDataFormat = clientFormat;
// set the client format to be what we want back
double rateRatio = GraphSampleRate / clientFormat.SampleRate;
var numFrames = file.FileLengthFrames;
numFrames = (uint)(numFrames * rateRatio); // account for any sample rate conversion
Debug.Print("Number of Sample Frames after rate conversion (if any): {0}", numFrames);
// set up our buffer
soundBuffer[i].TotalFrames = numFrames;
UInt32 samples = (uint)(numFrames * clientFormat.ChannelsPerFrame);
var data_size = (int)(sizeof(uint) * samples);
soundBuffer[i].Data = Marshal.AllocHGlobal(data_size);
// set up a AudioBufferList to read data into
var bufList = new AudioBuffers(1);
bufList [0] = new AudioBuffer {
NumberChannels = 1,
Data = soundBuffer [i].Data,
DataByteSize = data_size
};
ExtAudioFileError error;
file.Read((uint)numFrames, bufList, out error);
if (error != ExtAudioFileError.OK)
{
throw new ApplicationException();
}
}
}
}
public void WrapAudioFileID()
{
#if MONOMAC
var path = NSBundle.MainBundle.PathForResource("1", "caf", "AudioToolbox");
#else
var path = Path.GetFullPath(Path.Combine("AudioToolbox", "1.caf"));
#endif
using (var file = ExtAudioFile.OpenUrl(CFUrl.FromFile(path))) {
Assert.IsNotNull(file.AudioFile, "#1");
ExtAudioFile f2;
Assert.AreEqual(ExtAudioFileError.OK, ExtAudioFile.WrapAudioFileID(file.AudioFile.Value, true, out f2));
}
}
void prepareExtAudioFile()
{
// Opening Audio File
_extAudioFile = ExtAudioFile.OpenUrl(_url);
// Getting file data format
_srcFormat = _extAudioFile.FileDataFormat;
// Setting the channel number of the output format same to the input format
_dstFormat = AudioStreamBasicDescription.CreateLinearPCM(channelsPerFrame: (uint)_srcFormat.ChannelsPerFrame, bitsPerChannel: 32);
_dstFormat.FormatFlags |= AudioFormatFlags.IsNonInterleaved;
// setting reading format as audio unit cannonical format
_extAudioFile.ClientDataFormat = _dstFormat;
// getting total frame
_totalFrames = _extAudioFile.FileLengthFrames;
// Allocating AudioBufferList
_buffer = new AudioBuffers(_srcFormat.ChannelsPerFrame);
for (int i = 0; i < _buffer.Count; ++i)
{
int size = (int)(sizeof(uint) * _totalFrames);
_buffer.SetData(i, Marshal.AllocHGlobal(size), size);
}
_numberOfChannels = _srcFormat.ChannelsPerFrame;
// Reading all frame into the buffer
ExtAudioFileError status;
_extAudioFile.Read((uint)_totalFrames, _buffer, out status);
if (status != ExtAudioFileError.OK)
{
throw new ApplicationException();
}
}
