mirror of
https://github.com/Ryujinx/Opentk.git
synced 2024-12-25 04:06:08 +00:00
da9497928e
Moved SoundData and SoundFormat to OpenTK.Compatibility. Moved AL and Alc classes to OpenTK.Audio.OpenAL and added the previous namespace to OpenTK.Compatibility. Removed SoundData wrappers from AL class. Updated samples to use the new API.
413 lines
15 KiB
C#
413 lines
15 KiB
C#
#region License
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//
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// The Open Toolkit Library License
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//
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// Copyright (c) 2006 - 2009 the Open Toolkit library.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do
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// so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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//
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#endregion
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Runtime.InteropServices;
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using OpenTK.Audio.OpenAL;
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namespace OpenTK.Audio
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{
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/// <summary>
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/// Provides methods to instantiate, use and destroy an audio device for recording.
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/// Static methods are provided to list available devices known by the driver.
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/// </summary>
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public sealed class AudioCapture : IDisposable
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{
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#region Fields
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// This must stay private info so the end-user cannot call any Alc commands for the recording device.
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IntPtr Handle;
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// Alc.CaptureStop should be called prior to device shutdown, this keeps track of Alc.CaptureStart/Stop calls.
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bool _isrecording = false;
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ALFormat sample_format;
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int sample_frequency;
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#endregion
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#region Constructors
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static AudioCapture()
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{
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if (AudioDeviceEnumerator.IsOpenALSupported) // forces enumeration
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{
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}
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}
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/// <summary>
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/// Opens the default device for audio recording.
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/// Implicitly set parameters are: 22050Hz, 16Bit Mono, 4096 samples ringbuffer.
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/// </summary>
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public AudioCapture()
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: this(AudioCapture.DefaultDevice, 22050, ALFormat.Mono16, 4096)
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{
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}
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/// <summary>Opens a device for audio recording.</summary>
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/// <param name="deviceName">The device name.</param>
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/// <param name="frequency">The frequency that the data should be captured at.</param>
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/// <param name="sampleFormat">The requested capture buffer format.</param>
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/// <param name="bufferSize">The size of OpenAL's capture internal ring-buffer. This value expects number of samples, not bytes.</param>
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public AudioCapture(string deviceName, int frequency, ALFormat sampleFormat, int bufferSize)
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{
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if (!AudioDeviceEnumerator.IsOpenALSupported)
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throw new DllNotFoundException("openal32.dll");
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if (frequency <= 0)
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throw new ArgumentOutOfRangeException("frequency");
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if (bufferSize <= 0)
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throw new ArgumentOutOfRangeException("bufferSize");
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// Try to open specified device. If it fails, try to open default device.
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device_name = deviceName;
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Handle = Alc.CaptureOpenDevice(deviceName, frequency, sampleFormat, bufferSize);
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if (Handle == IntPtr.Zero)
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{
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Debug.WriteLine(ErrorMessage(deviceName, frequency, sampleFormat, bufferSize));
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device_name = "IntPtr.Zero";
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Handle = Alc.CaptureOpenDevice(null, frequency, sampleFormat, bufferSize);
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}
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if (Handle == IntPtr.Zero)
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{
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Debug.WriteLine(ErrorMessage("IntPtr.Zero", frequency, sampleFormat, bufferSize));
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device_name = AudioDeviceEnumerator.DefaultRecordingDevice;
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Handle = Alc.CaptureOpenDevice(AudioDeviceEnumerator.DefaultRecordingDevice, frequency, sampleFormat, bufferSize);
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}
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if (Handle == IntPtr.Zero)
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{
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// Everything we tried failed. Capture may not be supported, bail out.
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Debug.WriteLine(ErrorMessage(AudioDeviceEnumerator.DefaultRecordingDevice, frequency, sampleFormat, bufferSize));
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device_name = "None";
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throw new AudioDeviceException("All attempts to open capture devices returned IntPtr.Zero. See debug log for verbose list.");
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}
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// handle is not null, check for some Alc Error
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CheckErrors();
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SampleFormat = sampleFormat;
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SampleFrequency = frequency;
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}
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#endregion Constructor
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#region Public Members
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#region CurrentDevice
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private string device_name;
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/// <summary>
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/// The name of the device associated with this instance.
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/// </summary>
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public string CurrentDevice
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{
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get
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{
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return device_name;
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}
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}
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#endregion
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#region AvailableDevices
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/// <summary>
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/// Returns a list of strings containing all known recording devices.
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/// </summary>
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public static IList<string> AvailableDevices
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{
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get
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{
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return AudioDeviceEnumerator.AvailableRecordingDevices;
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}
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}
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#endregion
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#region DefaultDevice
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/// <summary>
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/// Returns the name of the device that will be used as recording default.
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/// </summary>
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public static string DefaultDevice
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{
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get
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{
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return AudioDeviceEnumerator.DefaultRecordingDevice;
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}
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}
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#endregion
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#region CheckErrors
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/// <summary>
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/// Checks for ALC error conditions.
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/// </summary>
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/// <exception cref="OutOfMemoryException">Raised when an out of memory error is detected.</exception>
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/// <exception cref="AudioValueException">Raised when an invalid value is detected.</exception>
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/// <exception cref="AudioDeviceException">Raised when an invalid device is detected.</exception>
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/// <exception cref="AudioContextException">Raised when an invalid context is detected.</exception>
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public void CheckErrors()
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{
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new AudioDeviceErrorChecker(Handle).Dispose();
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}
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#endregion
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#region CurrentError
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/// <summary>Returns the ALC error code for this device.</summary>
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public AlcError CurrentError
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{
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get
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{
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return Alc.GetError(Handle);
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}
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}
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#endregion
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#region Start & Stop
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/// <summary>
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/// Start recording samples.
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/// The number of available samples can be obtained through the <see cref="AvailableSamples"/> property.
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/// The data can be queried with any <see cref="ReadSamples"/> method.
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/// </summary>
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public void Start()
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{
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Alc.CaptureStart(Handle);
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_isrecording = true;
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}
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/// <summary>Stop recording samples. This will not clear previously recorded samples.</summary>
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public void Stop()
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{
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Alc.CaptureStop(Handle);
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_isrecording = false;
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}
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#endregion Start & Stop Capture
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#region AvailableSamples
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/// <summary>Returns the number of available samples for capture.</summary>
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public int AvailableSamples
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{
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get
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{
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// TODO: Investigate inconsistency between documentation and actual usage.
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// Doc claims the 3rd param is Number-of-Bytes, but it appears to be Number-of-Int32s
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int result;
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Alc.GetInteger(Handle, AlcGetInteger.CaptureSamples, 1, out result);
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return result;
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}
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}
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#endregion Available samples property
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#region ReadSamples
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/// <summary>Fills the specified buffer with samples from the internal capture ring-buffer. This method does not block: it is an error to specify a sampleCount larger than AvailableSamples.</summary>
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/// <param name="buffer">A pointer to a previously initialized and pinned array.</param>
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/// <param name="sampleCount">The number of samples to be written to the buffer.</param>
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public void ReadSamples(IntPtr buffer, int sampleCount)
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{
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Alc.CaptureSamples(Handle, buffer, sampleCount);
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}
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/// <summary>Fills the specified buffer with samples from the internal capture ring-buffer. This method does not block: it is an error to specify a sampleCount larger than AvailableSamples.</summary>
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/// <param name="buffer">The buffer to fill.</param>
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/// <param name="sampleCount">The number of samples to be written to the buffer.</param>
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/// <exception cref="System.ArgumentNullException">Raised when buffer is null.</exception>
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/// <exception cref="System.ArgumentOutOfRangeException">Raised when sampleCount is larger than the buffer.</exception>
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public void ReadSamples<TBuffer>(TBuffer[] buffer, int sampleCount)
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where TBuffer : struct
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{
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if (buffer == null)
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throw new ArgumentNullException("buffer");
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int buffer_size = BlittableValueType<TBuffer>.Stride * buffer.Length;
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// This is more of a heuristic than a 100% valid check. However, it will work
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// correctly for 99.9% of all use cases.
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// This should never produce a false positive, but a false negative might
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// be produced with compressed sample formats (which are very rare).
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// Still, this is better than no check at all.
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if (sampleCount * GetSampleSize(SampleFormat) > buffer_size)
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throw new ArgumentOutOfRangeException("sampleCount");
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GCHandle buffer_ptr = GCHandle.Alloc(buffer, GCHandleType.Pinned);
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try { ReadSamples(buffer_ptr.AddrOfPinnedObject(), sampleCount); }
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finally { buffer_ptr.Free(); }
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}
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#endregion
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#region SampleFormat & SampleFrequency
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/// <summary>
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/// Gets the OpenTK.Audio.ALFormat for this instance.
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/// </summary>
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public ALFormat SampleFormat
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{
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get { return sample_format; }
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private set { sample_format = value; }
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}
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/// <summary>
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/// Gets the sampling rate for this instance.
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/// </summary>
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public int SampleFrequency
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{
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get { return sample_frequency; }
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private set { sample_frequency = value; }
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}
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#endregion
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#region IsRunning
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/// <summary>
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/// Gets a value indicating whether this instance is currently capturing samples.
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/// </summary>
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public bool IsRunning
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{
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get { return _isrecording; }
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}
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#endregion
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#endregion
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#region Private Members
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// Retrieves the sample size in bytes for various ALFormats.
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// Compressed formats always return 1.
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static int GetSampleSize(ALFormat format)
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{
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switch (format)
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{
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case ALFormat.Mono8: return 1;
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case ALFormat.Mono16: return 2;
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case ALFormat.Stereo8: return 2;
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case ALFormat.Stereo16: return 4;
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case ALFormat.MonoFloat32Ext: return 4;
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case ALFormat.MonoDoubleExt: return 8;
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case ALFormat.StereoFloat32Ext: return 8;
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case ALFormat.StereoDoubleExt: return 16;
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case ALFormat.MultiQuad8Ext: return 4;
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case ALFormat.MultiQuad16Ext: return 8;
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case ALFormat.MultiQuad32Ext: return 16;
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case ALFormat.Multi51Chn8Ext: return 6;
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case ALFormat.Multi51Chn16Ext: return 12;
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case ALFormat.Multi51Chn32Ext: return 24;
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case ALFormat.Multi61Chn8Ext: return 7;
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case ALFormat.Multi71Chn16Ext: return 14;
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case ALFormat.Multi71Chn32Ext: return 28;
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case ALFormat.MultiRear8Ext: return 1;
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case ALFormat.MultiRear16Ext: return 2;
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case ALFormat.MultiRear32Ext: return 4;
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default: return 1; // Unknown sample size.
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}
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}
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// Converts an error code to an error string with additional information.
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string ErrorMessage(string devicename, int frequency, ALFormat bufferformat, int buffersize)
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{
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string alcerrmsg;
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AlcError alcerrcode = CurrentError;
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switch (alcerrcode)
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{
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case AlcError.OutOfMemory:
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alcerrmsg = alcerrcode.ToString() + ": The specified device is invalid, or can not capture audio.";
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break;
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case AlcError.InvalidValue:
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alcerrmsg = alcerrcode.ToString() + ": One of the parameters has an invalid value.";
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break;
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default:
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alcerrmsg = alcerrcode.ToString();
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break;
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}
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return "The handle returned by Alc.CaptureOpenDevice is null." +
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"\nAlc Error: " + alcerrmsg +
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"\nDevice Name: " + devicename +
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"\nCapture frequency: " + frequency +
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"\nBuffer format: " + bufferformat +
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"\nBuffer Size: " + buffersize;
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}
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#endregion
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#region IDisposable Members
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~AudioCapture()
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{
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Dispose();
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}
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private bool IsDisposed;
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/// <summary>Closes the device and disposes the instance.</summary>
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public void Dispose()
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{
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this.Dispose(true);
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GC.SuppressFinalize(this);
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}
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private void Dispose(bool manual)
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{
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if (!this.IsDisposed)
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{
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if (this.Handle != IntPtr.Zero)
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{
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if (this._isrecording)
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this.Stop();
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Alc.CaptureCloseDevice(this.Handle);
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}
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this.IsDisposed = true;
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}
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}
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#endregion Destructor
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}
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}
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