public static AudioStreamBasicDescription[] GetAvailableStreamDescriptions(AudioFileType fileType, AudioFormatType formatType)
{
AudioFileTypeAndFormatID input;
input.FileType = fileType;
input.FormatType = formatType;
uint size;
if (AudioFileGetGlobalInfoSize(AudioFileGlobalProperty.AvailableStreamDescriptionsForFormat, (uint)sizeof(AudioFileTypeAndFormatID), ref input, out size) != 0)
{
return(null);
}
var data = new AudioStreamBasicDescription[size / sizeof(AudioStreamBasicDescription)];
fixed(AudioStreamBasicDescription *ptr = data)
{
var res = AudioFileGetGlobalInfo(AudioFileGlobalProperty.AvailableStreamDescriptionsForFormat, (uint)sizeof(AudioFileTypeAndFormatID), ref input, ref size, ptr);
if (res != 0)
{
return(null);
}
return(data);
}
}
public static AudioFormatError GetFormatInfo(ref AudioStreamBasicDescription format)
{
unsafe {
var size = sizeof(AudioStreamBasicDescription);
return(AudioFormatPropertyNative.AudioFormatGetProperty(AudioFormatProperty.FormatInfo, 0, IntPtr.Zero, ref size, ref format));
}
}
protected override void init(DisposableI parent, Stream stream, int instanceCount, bool looped, Loader.LoadedCallbackMethod loadedCallback)
{
base.init(parent, stream, instanceCount, looped, loadedCallback);
try
{
audio = parent.FindParentOrSelfWithException<Audio>();
audio.UpdateCallback += Update;
this.data = base.data;
this.channels = base.channels;
this.bitDepth = base.bitDepth;
desc = AudioUnitUtils.AUCanonicalASBD(sampleRate, channels);
desc.FormatFlags = (AudioFormatFlags)((int)AudioFormatFlags.IsSignedInteger | (int)AudioFormatFlags.IsPacked | (int)AudioFormatFlags.IsNonInterleaved);
for (int i = 0; i != instanceCount; ++i)
{
inactiveInstances.AddLast(new SoundWAVInstance(this, looped));
}
}
catch (Exception e)
{
FailedToLoad = true;
Loader.AddLoadableException(e);
Dispose();
if (loadedCallback != null) loadedCallback(this, false);
return;
}
Loaded = true;
if (loadedCallback != null) loadedCallback(this, true);
}
extern static OSStatus AudioQueueNewInput(
ref AudioStreamBasicDescription format,
AudioQueueInputCallback callback,
IntPtr inUserData,
IntPtr cfrunLoop_inCallbackRunLoop,
IntPtr cfstringref_inCallbackRunLoopMode,
UInt32 inFlags,
out IntPtr audioQueue);
public void SetOfflineRenderFormat(AudioStreamBasicDescription desc, AudioChannelLayout layout)
{
int size;
var h = AudioFile.AudioChannelLayoutToBlock(layout, out size);
AudioQueueSetOfflineRenderFormat(handle, ref resc, h);
Marshal.FreeHGlobal(h);
}
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 static AudioFile Create(string url, AudioFileType fileType, AudioStreamBasicDescription format, AudioFileFlags inFlags)
{
if (url == null)
{
throw new ArgumentNullException("url");
}
using (CFUrl cfurl = CFUrl.FromUrlString(url, null))
return(Create(cfurl, fileType, format, inFlags));
}
public AudioQueueStatus SetOfflineRenderFormat(AudioStreamBasicDescription desc, AudioChannelLayout layout)
{
int size;
var h = layout == null ? IntPtr.Zero : AudioChannelLayout.ToBlock(layout, out size);
try {
return(AudioQueueSetOfflineRenderFormat(handle, ref desc, h));
} finally {
Marshal.FreeHGlobal(h);
}
}
public static AudioConverter Create(AudioStreamBasicDescription sourceFormat, AudioStreamBasicDescription destinationFormat, out AudioConverterError error)
{
IntPtr ptr = new IntPtr();
error = AudioConverterNew(ref sourceFormat, ref destinationFormat, ref ptr);
if (error != AudioConverterError.None)
{
return(null);
}
return(new AudioConverter(ptr, true));
}
public static AudioStreamBasicDescription CreateLinearPCM(double sampleRate = 441000, uint channelsPerFrame = 2, uint bitsPerChannel = 16)
{
var desc = new AudioStreamBasicDescription(AudioFormatType.LinearPCM);
desc.SampleRate = sampleRate;
desc.ChannelsPerFrame = (int)channelsPerFrame;
desc.BitsPerChannel = (int)bitsPerChannel;
desc.BytesPerPacket = desc.BytesPerFrame = (int)channelsPerFrame * sizeof(Int16);
desc.FramesPerPacket = 1;
desc.FormatFlags = AudioFormatFlags.IsBigEndian | AudioFormatFlags.IsSignedInteger | AudioFormatFlags.IsPacked;
return(desc);
}
protected void Initialize(AudioFileType inFileType, AudioStreamBasicDescription format)
{
IntPtr h;
gch = GCHandle.Alloc(this);
var code = AudioFileInitializeWithCallbacks(GCHandle.ToIntPtr(gch), dRead, dWrite, dGetSize, dSetSize, inFileType, ref format, 0, out h);
if (code == 0)
{
handle = h;
return;
}
throw new Exception(String.Format("Unable to create AudioSource, code: 0x{0:x}", code));
}
public void SetAudioFormat(MonoMac.AudioToolbox.AudioStreamBasicDescription audioFormat, AudioUnitScopeType scope, uint audioUnitElement = 0)
{
int err = AudioUnitSetProperty(handle,
AudioUnitPropertyIDType.StreamFormat,
scope,
audioUnitElement,
ref audioFormat,
(uint)Marshal.SizeOf(audioFormat));
if (err != 0)
{
throw new AudioUnitException(err);
}
}
public static AudioFile Create(NSUrl url, AudioFileType fileType, AudioStreamBasicDescription format, AudioFileFlags inFlags)
{
if (url == null)
{
throw new ArgumentNullException("url");
}
IntPtr h;
if (AudioFileCreateWithURL(url.Handle, fileType, ref format, inFlags, out h) == 0)
{
return(new AudioFile(h));
}
return(null);
}
public static AudioConverter Create(AudioStreamBasicDescription sourceFormat, AudioStreamBasicDescription destinationFormat, AudioClassDescription[] descriptions)
{
if (descriptions == null)
{
throw new ArgumentNullException("descriptions");
}
IntPtr ptr = new IntPtr();
var res = AudioConverterNewSpecific(ref sourceFormat, ref destinationFormat, descriptions.Length, ref descriptions, ref ptr);
if (res != AudioConverterError.None)
{
return(null);
}
return(new AudioConverter(ptr, true));
}
public OutputAudioQueue(AudioStreamBasicDescription desc, CFRunLoop runLoop, CFString runMode)
{
IntPtr h;
GCHandle gch = GCHandle.Alloc(this);
var code = AudioQueueNewOutput(ref desc, dOutputCallback, GCHandle.ToIntPtr(gch),
runLoop == null ? IntPtr.Zero : runLoop.Handle,
runMode == null ? IntPtr.Zero : runMode.Handle, 0, out h);
if (code != 0)
{
gch.Free();
throw new AudioQueueException(code);
}
this.gch = gch;
handle = h;
}
public unsafe static int[] GetAvailableEncodeNumberChannels(AudioStreamBasicDescription format)
{
uint size;
if (AudioFormatPropertyNative.AudioFormatGetPropertyInfo(AudioFormatProperty.AvailableEncodeNumberChannels, sizeof(AudioStreamBasicDescription), ref format, out size) != 0)
{
return(null);
}
var data = new int[size / sizeof(int)];
fixed(int *ptr = data)
{
var res = AudioFormatPropertyNative.AudioFormatGetProperty(AudioFormatProperty.AvailableEncodeNumberChannels, sizeof(AudioStreamBasicDescription), ref format, ref size, ptr);
if (res != 0)
{
return(null);
}
return(data);
}
}
public InputAudioQueue(AudioStreamBasicDescription desc, CFRunLoop runLoop, string runMode)
{
IntPtr h;
GCHandle mygch = GCHandle.Alloc(this);
CFString s = runMode == null ? null : new CFString(runMode);
var code = AudioQueueNewInput(ref desc, dInputCallback, GCHandle.ToIntPtr(mygch),
runLoop == null ? IntPtr.Zero : runLoop.Handle,
s == null ? IntPtr.Zero : s.Handle, 0, out h);
if (s != null)
{
s.Dispose();
}
if (code == 0)
{
handle = h;
gch = mygch;
return;
}
gch.Free();
throw new AudioQueueException(code);
}
public static AudioStreamBasicDescription AUCanonicalASBD(double sampleRate, int channel)
{
// setting AudioStreamBasicDescription
int AudioUnitSampleTypeSize =
#if !MONOMAC
(MonoMac.ObjCRuntime.Runtime.Arch == MonoTouch.ObjCRuntime.Arch.SIMULATOR) ? sizeof(float) : sizeof(int);
#else
sizeof (float);
#endif
AudioStreamBasicDescription audioFormat = new AudioStreamBasicDescription()
{
SampleRate = sampleRate,
Format = AudioFormatType.LinearPCM,
//kAudioFormatFlagsAudioUnitCanonical = kAudioFormatFlagIsSignedInteger | kAudioFormatFlagsNativeEndian | kAudioFormatFlagIsPacked | kAudioFormatFlagIsNonInterleaved | (SampleFractionBits << kLinearPCMFormatFlagsSampleFractionShift),
FormatFlags = (AudioFormatFlags)((int)AudioFormatFlags.IsSignedInteger | (int)AudioFormatFlags.IsPacked | (int)AudioFormatFlags.IsNonInterleaved | (int)(SampleFractionBits << (int)AudioFormatFlags.LinearPCMSampleFractionShift)),
ChannelsPerFrame = channel,
BytesPerPacket = AudioUnitSampleTypeSize,
BytesPerFrame = AudioUnitSampleTypeSize,
FramesPerPacket = 1,
BitsPerChannel = 8 * AudioUnitSampleTypeSize,
Reserved = 0
};
return audioFormat;
}
public AudioSource(AudioFileType inFileType, AudioStreamBasicDescription format) : base(true)
{
Initialize(inFileType, format);
}
extern static OSStatus AudioFileInitializeWithCallbacks(
IntPtr inClientData, ReadProc inReadFunc, WriteProc inWriteFunc, GetSizeProc inGetSizeFunc, SetSizeProc inSetSizeFunc,
AudioFileType inFileType, ref AudioStreamBasicDescription format, uint flags, out IntPtr id);
public static AudioStreamBasicDescription[] GetAvailableStreamDescriptions (AudioFileType fileType, AudioFormatType formatType)
{
AudioFileTypeAndFormatID input;
input.FileType = fileType;
input.FormatType = formatType;
uint size;
if (AudioFileGetGlobalInfoSize (AudioFileGlobalProperty.AvailableStreamDescriptionsForFormat, (uint)sizeof (AudioFileTypeAndFormatID), ref input, out size) != 0)
return null;
var data = new AudioStreamBasicDescription[size / sizeof (AudioStreamBasicDescription)];
fixed (AudioStreamBasicDescription* ptr = data) {
var res = AudioFileGetGlobalInfo (AudioFileGlobalProperty.AvailableStreamDescriptionsForFormat, (uint)sizeof (AudioFileTypeAndFormatID), ref input, ref size, ptr);
if (res != 0)
return null;
return data;
}
}
extern static int AudioFileGetGlobalInfo (AudioFileGlobalProperty propertyID, uint size, ref AudioFileTypeAndFormatID inSpecifier, ref uint ioDataSize, AudioStreamBasicDescription* outPropertyData);
public static AudioFormatError GetFormatInfo (ref AudioStreamBasicDescription format)
{
unsafe {
var size = sizeof (AudioStreamBasicDescription);
return AudioFormatPropertyNative.AudioFormatGetProperty (AudioFormatProperty.FormatInfo, 0, IntPtr.Zero, ref size, ref format);
}
}
public static AudioConverter Create(AudioStreamBasicDescription sourceFormat, AudioStreamBasicDescription destinationFormat)
{
AudioConverterError res;
return(Create(sourceFormat, destinationFormat, out res));
}
public static AudioStreamBasicDescription CreateLinearPCM (double sampleRate = 44100, uint channelsPerFrame = 2, uint bitsPerChannel = 16, bool bigEndian = false)
{
var desc = new AudioStreamBasicDescription (AudioFormatType.LinearPCM);
desc.SampleRate = sampleRate;
desc.ChannelsPerFrame = (int) channelsPerFrame;
desc.BitsPerChannel = (int) bitsPerChannel;
desc.BytesPerPacket = desc.BytesPerFrame = (int) channelsPerFrame * sizeof (Int16);
desc.FramesPerPacket = 1;
desc.FormatFlags = AudioFormatFlags.IsSignedInteger | AudioFormatFlags.IsPacked;
if (bigEndian)
desc.FormatFlags |= AudioFormatFlags.IsBigEndian;
return desc;
}
public static bool GetDataFromExtAudioFile (ExtAudioFile ext, AudioStreamBasicDescription outputFormat, int maxBufferSize,
byte[] dataBuffer, out int dataBufferSize, out ALFormat format, out double sampleRate)
{
int errorStatus = 0;
int bufferSizeInFrames = 0;
dataBufferSize = 0;
format = ALFormat.Mono16;
sampleRate = 0;
/* Compute how many frames will fit into our max buffer size */
bufferSizeInFrames = maxBufferSize / outputFormat.BytesPerFrame;
if (dataBuffer != null) {
MutableAudioBufferList audioBufferList = new MutableAudioBufferList (1, maxBufferSize);
audioBufferList.Buffers [0].DataByteSize = maxBufferSize;
audioBufferList.Buffers [0].NumberChannels = outputFormat.ChannelsPerFrame;
// This a hack so if there is a problem speak to kjpou1 -Kenneth
// the cleanest way is to copy the buffer to the pointer already allocated
// but what we are going to do is replace the pointer with our own and restore it later
//
GCHandle meBePinned = GCHandle.Alloc (dataBuffer, GCHandleType.Pinned);
IntPtr meBePointer = meBePinned.AddrOfPinnedObject ();
// Let's not use copy for right now while we test this. For very large files this
// might show some stutter in the sound loading
//Marshal.Copy(dataBuffer, 0, audioBufferList.Buffers[0].Data, maxBufferSize);
IntPtr savedDataPtr = audioBufferList.Buffers [0].Data;
audioBufferList.Buffers [0].Data = meBePointer;
try {
// Read the data into an AudioBufferList
// errorStatus here returns back the amount of information read
errorStatus = ext.Read (bufferSizeInFrames, audioBufferList);
if (errorStatus >= 0) {
/* Success */
/* Note: 0 == bufferSizeInFrames is a legitimate value meaning we are EOF. */
/* ExtAudioFile.Read returns the number of frames actually read.
* Need to convert back to bytes.
*/
dataBufferSize = bufferSizeInFrames * outputFormat.BytesPerFrame;
// Now we set our format
format = outputFormat.ChannelsPerFrame > 1 ? ALFormat.Stereo16 : ALFormat.Mono16;
sampleRate = outputFormat.SampleRate;
} else {
#if DEBUG
Console.WriteLine ("ExtAudioFile.Read failed, Error = " + errorStatus);
#endif
return false;
}
} catch (Exception exc) {
#if DEBUG
Console.WriteLine ("ExtAudioFile.Read failed: " + exc.Message);
#endif
return false;
} finally {
// Don't forget to free our dataBuffer memory pointer that was pinned above
meBePinned.Free ();
// and restore what was allocated to beginwith
audioBufferList.Buffers[0].Data = savedDataPtr;
}
}
return true;
}
static extern AudioConverterError AudioConverterNewSpecific(ref AudioStreamBasicDescription inSourceFormat, ref AudioStreamBasicDescription inDestinationFormat,
int inNumberClassDescriptions, ref AudioClassDescription[] inClassDescriptions, ref IntPtr outAudioConverter);
static extern AudioConverterError AudioConverterNew(ref AudioStreamBasicDescription inSourceFormat, ref AudioStreamBasicDescription inDestinationFormat, ref IntPtr outAudioConverter);
static extern int AudioUnitGetProperty(IntPtr inUnit,
[MarshalAs(UnmanagedType.U4)] AudioUnitPropertyIDType inID,
[MarshalAs(UnmanagedType.U4)] AudioUnitScopeType inScope,
[MarshalAs(UnmanagedType.U4)] uint inElement,
ref MonoMac.AudioToolbox.AudioStreamBasicDescription outData,
ref uint ioDataSize);
public OutputAudioQueue(AudioStreamBasicDescription desc, CFRunLoop runLoop, string runMode)
: this(desc, runLoop, runMode == null ? null : new CFString(runMode))
{
}
extern static OSStatus AudioFileCreateWithURL(IntPtr cfurlref_infile, AudioFileType inFileType, ref AudioStreamBasicDescription inFormat, AudioFileFlags inFlags, out AudioFileID file_id);
extern static AudioQueueStatus AudioQueueSetOfflineRenderFormat(IntPtr aq, ref AudioStreamBasicDescription format, IntPtr layout);
public MonoMac.AudioToolbox.AudioStreamBasicDescription GetAudioFormat(AudioUnitScopeType scope, uint audioUnitElement)
{
MonoMac.AudioToolbox.AudioStreamBasicDescription audioFormat = new AudioStreamBasicDescription();
uint size = (uint)Marshal.SizeOf(audioFormat);
int err = AudioUnitGetProperty(handle,
AudioUnitPropertyIDType.StreamFormat,
scope,
audioUnitElement,
ref audioFormat,
ref size);
if (err != 0)
throw new AudioUnitException (err);
return audioFormat;
}
public unsafe static AudioChannelLayoutTag[] GetAvailableEncodeChannelLayoutTags (AudioStreamBasicDescription format)
{
var type_size = sizeof (AudioStreamBasicDescription);
uint size;
if (AudioFormatPropertyNative.AudioFormatGetPropertyInfo (AudioFormatProperty.AvailableEncodeChannelLayoutTags, type_size, ref format, out size) != 0)
return null;
var data = new AudioChannelLayoutTag[size / sizeof (AudioChannelLayoutTag)];
fixed (AudioChannelLayoutTag* ptr = data) {
var res = AudioFormatPropertyNative.AudioFormatGetProperty (AudioFormatProperty.AvailableEncodeChannelLayoutTags, type_size, ref format, ref size, (int*)ptr);
if (res != 0)
return null;
return data;
}
}
public OutputAudioQueue(AudioStreamBasicDescription desc) : this(desc, null, (CFString)null)
{
}
public unsafe static AudioChannelLayoutTag[] GetAvailableEncodeChannelLayoutTags(AudioStreamBasicDescription format)
{
var type_size = sizeof(AudioStreamBasicDescription);
uint size;
if (AudioFormatPropertyNative.AudioFormatGetPropertyInfo(AudioFormatProperty.AvailableEncodeChannelLayoutTags, type_size, ref format, out size) != 0)
{
return(null);
}
var data = new AudioChannelLayoutTag[size / sizeof(AudioChannelLayoutTag)];
fixed(AudioChannelLayoutTag *ptr = data)
{
var res = AudioFormatPropertyNative.AudioFormatGetProperty(AudioFormatProperty.AvailableEncodeChannelLayoutTags, type_size, ref format, ref size, (int *)ptr);
if (res != 0)
{
return(null);
}
return(data);
}
}
static extern int AudioConverterNew(
ref MonoMac.AudioToolbox.AudioStreamBasicDescription inSourceFormat,
ref MonoMac.AudioToolbox.AudioStreamBasicDescription inDestinationFormat,
IntPtr outAudioConverter);
public static AudioFormatError GetFormatInfo(ref AudioStreamBasicDescription format)
{
var size = Marshal.SizeOf(format);
return(AudioFormatPropertyNative.AudioFormatGetProperty(AudioFormatProperty.FormatInfo, 0, IntPtr.Zero, ref size, ref format));
}
public static bool GetDataFromExtAudioFile (ExtAudioFile ext, AudioStreamBasicDescription outputFormat, int maxBufferSize,
byte[] dataBuffer, out int dataBufferSize, out ALFormat format, out double sampleRate)
{
uint errorStatus = 0;
uint bufferSizeInFrames = 0;
dataBufferSize = 0;
format = ALFormat.Mono16;
sampleRate = 0;
/* Compute how many frames will fit into our max buffer size */
bufferSizeInFrames = (uint)(maxBufferSize / outputFormat.BytesPerFrame);
if (dataBuffer != null) {
var audioBufferList = new AudioBuffers(maxBufferSize);
// This a hack so if there is a problem speak to kjpou1 -Kenneth
// the cleanest way is to copy the buffer to the pointer already allocated
// but what we are going to do is replace the pointer with our own and restore it later
//
GCHandle meBePinned = GCHandle.Alloc (dataBuffer, GCHandleType.Pinned);
IntPtr meBePointer = meBePinned.AddrOfPinnedObject ();
audioBufferList.SetData (0, meBePointer);
try {
// Read the data into an AudioBufferList
// errorStatus here returns back the amount of information read
ExtAudioFileError extAudioFileError = ExtAudioFileError.OK;
errorStatus = ext.Read (bufferSizeInFrames, audioBufferList, out extAudioFileError);
if (errorStatus >= 0) {
/* Success */
/* Note: 0 == bufferSizeInFrames is a legitimate value meaning we are EOF. */
/* ExtAudioFile.Read returns the number of frames actually read.
* Need to convert back to bytes.
*/
dataBufferSize = (int)bufferSizeInFrames * outputFormat.BytesPerFrame;
// Now we set our format
format = outputFormat.ChannelsPerFrame > 1 ? ALFormat.Stereo16 : ALFormat.Mono16;
sampleRate = outputFormat.SampleRate;
} else {
#if DEBUG
Console.WriteLine ("ExtAudioFile.Read failed, Error = " + errorStatus);
#endif
return false;
}
} catch (Exception exc) {
#if DEBUG
Console.WriteLine ("ExtAudioFile.Read failed: " + exc.Message);
#endif
return false;
} finally {
// Don't forget to free our dataBuffer memory pointer that was pinned above
meBePinned.Free ();
// and restore what was allocated to beginwith
audioBufferList.SetData (0, IntPtr.Zero);
}
}
return true;
}
public unsafe static int[] GetAvailableEncodeNumberChannels (AudioStreamBasicDescription format)
{
uint size;
if (AudioFormatPropertyNative.AudioFormatGetPropertyInfo (AudioFormatProperty.AvailableEncodeNumberChannels, sizeof (AudioStreamBasicDescription), ref format, out size) != 0)
return null;
var data = new int[size / sizeof (int)];
fixed (int* ptr = data) {
var res = AudioFormatPropertyNative.AudioFormatGetProperty (AudioFormatProperty.AvailableEncodeNumberChannels, sizeof (AudioStreamBasicDescription), ref format, ref size, ptr);
if (res != 0)
return null;
return data;
}
}
public InputAudioQueue(AudioStreamBasicDescription desc) : this(desc, null, null)
{
}
static extern int ExtAudioFileCreateWithUrl(IntPtr inURL,
[MarshalAs(UnmanagedType.U4)] AudioFileType inFileType,
ref AudioStreamBasicDescription inStreamDesc,
IntPtr inChannelLayout, //AudioChannelLayout inChannelLayout, AudioChannelLayout results in compilation error (error code 134.)
UInt32 flags,
IntPtr outExtAudioFile);
extern static OSStatus AudioQueueNewOutput(ref AudioStreamBasicDescription format, AudioQueueOutputCallback callback,
IntPtr userData, IntPtr cfrunLoop_callbackRunloop, IntPtr cfstr_runMode,
uint flags, out IntPtr audioQueue);
public static _AudioConverter CreateInstance(AudioStreamBasicDescription srcFormat, AudioStreamBasicDescription destFormat)
{
_AudioConverter inst = new _AudioConverter();
int err_code;
unsafe{
IntPtr ptr = inst._audioConverter;
IntPtr pptr =(IntPtr)(&ptr);
err_code = AudioConverterNew(ref srcFormat, ref destFormat, pptr);
}
if (err_code != 0)
{
throw new ArgumentException(String.Format("Error code:{0}", err_code));
}
return inst;
}
public static unsafe extern AudioFormatError AudioFormatGetProperty(AudioFormatProperty propertyID, int inSpecifierSize, ref AudioStreamBasicDescription inSpecifier, ref uint ioDataSize, int* outPropertyData);
public static extern AudioFormatError AudioFormatGetProperty(AudioFormatProperty inPropertyID, int inSpecifierSize, IntPtr inSpecifier, ref int ioPropertyDataSize, ref AudioStreamBasicDescription outPropertyData);
public static ExtAudioFile CreateWithUrl(MonoMac.CoreFoundation.CFUrl url,
AudioFileType fileType,
AudioStreamBasicDescription inStreamDesc,
//AudioChannelLayout channelLayout,
AudioFileFlags flag)
{
int err;
IntPtr ptr = new IntPtr();
unsafe {
err = ExtAudioFileCreateWithUrl(url.Handle, fileType, ref inStreamDesc, IntPtr.Zero, (uint)flag,
(IntPtr)(&ptr));
}
if (err != 0)
{
throw new ArgumentException(String.Format("Error code:{0}", err));
}
if (ptr == IntPtr.Zero)
{
throw new InvalidOperationException("Can not get object instance");
}
return new ExtAudioFile(ptr);
}
public static extern AudioFormatError AudioFormatGetPropertyInfo(AudioFormatProperty propertyID, int inSpecifierSize, ref AudioStreamBasicDescription inSpecifier, out uint outPropertyDataSize);
static extern int ExtAudioFileSetProperty(
IntPtr inExtAudioFile,
ExtAudioFilePropertyIDType inPropertyID,
uint ioPropertyDataSize,
ref AudioStreamBasicDescription outPropertyData);
public static bool Convert(string input, string output, AudioFormatType targetFormat, AudioFileType containerType, Microsoft.Xna.Framework.Content.Pipeline.Audio.ConversionQuality quality) {
CFUrl source = CFUrl.FromFile (input);
CFUrl dest = CFUrl.FromFile (output);
var dstFormat = new AudioStreamBasicDescription ();
var sourceFile = AudioFile.Open (source, AudioFilePermission.Read);
AudioFormatType outputFormat = targetFormat;
// get the source data format
var srcFormat = (AudioStreamBasicDescription)sourceFile.DataFormat;
var outputSampleRate = 0;
switch (quality)
{
case Microsoft.Xna.Framework.Content.Pipeline.Audio.ConversionQuality.Low:
outputSampleRate = (int)Math.Max (8000, srcFormat.SampleRate / 2);
break;
default:
outputSampleRate = (int)Math.Max (8000, srcFormat.SampleRate);
break;
}
dstFormat.SampleRate = (outputSampleRate == 0 ? srcFormat.SampleRate : outputSampleRate); // set sample rate
if (outputFormat == AudioFormatType.LinearPCM) {
// if the output format is PC create a 16-bit int PCM file format description as an example
dstFormat.Format = outputFormat;
dstFormat.ChannelsPerFrame = srcFormat.ChannelsPerFrame;
dstFormat.BitsPerChannel = 16;
dstFormat.BytesPerPacket = dstFormat.BytesPerFrame = 2 * dstFormat.ChannelsPerFrame;
dstFormat.FramesPerPacket = 1;
dstFormat.FormatFlags = AudioFormatFlags.LinearPCMIsPacked | AudioFormatFlags.LinearPCMIsSignedInteger;
} else {
// compressed format - need to set at least format, sample rate and channel fields for kAudioFormatProperty_FormatInfo
dstFormat.Format = outputFormat;
dstFormat.ChannelsPerFrame = (outputFormat == AudioFormatType.iLBC ? 1 : srcFormat.ChannelsPerFrame); // for iLBC num channels must be 1
// use AudioFormat API to fill out the rest of the description
var fie = AudioStreamBasicDescription.GetFormatInfo (ref dstFormat);
if (fie != AudioFormatError.None) {
return false;
}
}
var converter = AudioConverter.Create (srcFormat, dstFormat);
converter.InputData += HandleInputData;
// if the source has a cookie, get it and set it on the Audio Converter
ReadCookie (sourceFile, converter);
// get the actual formats back from the Audio Converter
srcFormat = converter.CurrentInputStreamDescription;
dstFormat = converter.CurrentOutputStreamDescription;
// if encoding to AAC set the bitrate to 192k which is a nice value for this demo
// kAudioConverterEncodeBitRate is a UInt32 value containing the number of bits per second to aim for when encoding data
if (dstFormat.Format == AudioFormatType.MPEG4AAC) {
uint outputBitRate = 192000; // 192k
// ignore errors as setting may be invalid depending on format specifics such as samplerate
try {
converter.EncodeBitRate = outputBitRate;
} catch {
}
// get it back and print it out
outputBitRate = converter.EncodeBitRate;
}
// create the destination file
var destinationFile = AudioFile.Create (dest, containerType, dstFormat, AudioFileFlags.EraseFlags);
// set up source buffers and data proc info struct
afio = new AudioFileIO (32768);
afio.SourceFile = sourceFile;
afio.SrcFormat = srcFormat;
if (srcFormat.BytesPerPacket == 0) {
// if the source format is VBR, we need to get the maximum packet size
// use kAudioFilePropertyPacketSizeUpperBound which returns the theoretical maximum packet size
// in the file (without actually scanning the whole file to find the largest packet,
// as may happen with kAudioFilePropertyMaximumPacketSize)
afio.SrcSizePerPacket = sourceFile.PacketSizeUpperBound;
// how many packets can we read for our buffer size?
afio.NumPacketsPerRead = afio.SrcBufferSize / afio.SrcSizePerPacket;
// allocate memory for the PacketDescription structures describing the layout of each packet
afio.PacketDescriptions = new AudioStreamPacketDescription [afio.NumPacketsPerRead];
} else {
// CBR source format
afio.SrcSizePerPacket = srcFormat.BytesPerPacket;
afio.NumPacketsPerRead = afio.SrcBufferSize / afio.SrcSizePerPacket;
// allocate memory for the PacketDescription structures describing the layout of each packet
afio.PacketDescriptions = new AudioStreamPacketDescription [afio.NumPacketsPerRead];
}
// set up output buffers
int outputSizePerPacket = dstFormat.BytesPerPacket; // this will be non-zero if the format is CBR
const int theOutputBufSize = 32768;
var outputBuffer = Marshal.AllocHGlobal (theOutputBufSize);
AudioStreamPacketDescription[] outputPacketDescriptions = null;
if (outputSizePerPacket == 0) {
// if the destination format is VBR, we need to get max size per packet from the converter
outputSizePerPacket = (int)converter.MaximumOutputPacketSize;
}
// allocate memory for the PacketDescription structures describing the layout of each packet
outputPacketDescriptions = new AudioStreamPacketDescription [theOutputBufSize / outputSizePerPacket];
int numOutputPackets = theOutputBufSize / outputSizePerPacket;
// if the destination format has a cookie, get it and set it on the output file
WriteCookie (converter, destinationFile);
// write destination channel layout
if (srcFormat.ChannelsPerFrame > 2) {
WriteDestinationChannelLayout (converter, sourceFile, destinationFile);
}
long totalOutputFrames = 0; // used for debugging
long outputFilePos = 0;
AudioBuffers fillBufList = new AudioBuffers (1);
bool error = false;
// loop to convert data
while (true) {
// set up output buffer list
fillBufList [0] = new AudioBuffer () {
NumberChannels = dstFormat.ChannelsPerFrame,
DataByteSize = theOutputBufSize,
Data = outputBuffer
};
// convert data
int ioOutputDataPackets = numOutputPackets;
var fe = converter.FillComplexBuffer (ref ioOutputDataPackets, fillBufList, outputPacketDescriptions);
// if interrupted in the process of the conversion call, we must handle the error appropriately
if (fe != AudioConverterError.None) {
error = true;
break;
}
if (ioOutputDataPackets == 0) {
// this is the EOF conditon
break;
}
// write to output file
var inNumBytes = fillBufList [0].DataByteSize;
var we = destinationFile.WritePackets (false, inNumBytes, outputPacketDescriptions, outputFilePos, ref ioOutputDataPackets, outputBuffer);
if (we != 0) {
error = true;
break;
}
// advance output file packet position
outputFilePos += ioOutputDataPackets;
if (dstFormat.FramesPerPacket != 0) {
// the format has constant frames per packet
totalOutputFrames += (ioOutputDataPackets * dstFormat.FramesPerPacket);
} else {
// variable frames per packet require doing this for each packet (adding up the number of sample frames of data in each packet)
for (var i = 0; i < ioOutputDataPackets; ++i)
totalOutputFrames += outputPacketDescriptions [i].VariableFramesInPacket;
}
}
Marshal.FreeHGlobal (outputBuffer);
if (!error) {
// write out any of the leading and trailing frames for compressed formats only
if (dstFormat.BitsPerChannel == 0) {
// our output frame count should jive with
WritePacketTableInfo (converter, destinationFile);
}
// write the cookie again - sometimes codecs will update cookies at the end of a conversion
WriteCookie (converter, destinationFile);
}
converter.Dispose ();
destinationFile.Dispose ();
sourceFile.Dispose ();
return true;
}
