Opentk/Source/Examples/OpenAL/1.1/Parrot.cs
the_fiddler c1f41d1eb9 Moved Alut to OpenTK.Compatibility.
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.
2009-08-17 10:32:20 +00:00

239 lines
7.6 KiB
C#

#region License
//
// The Open Toolkit Library License
//
// Copyright (c) 2006 - 2009 the Open Toolkit library.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do
// so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
//
#endregion
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Threading;
using OpenTK;
using OpenTK.Audio;
using OpenTK.Audio.OpenAL;
namespace Examples
{
[Example("Parrot Audio Capture", ExampleCategory.OpenAL, "1.1", Documentation = "Parrot")]
public partial class Parrot : Form
{
#region Fields
AudioContext audio_context;
AudioCapture audio_capture;
int src;
short[] buffer = new short[512];
const byte SampleToByte = 2;
#endregion
#region Constructors
public Parrot()
{
InitializeComponent();
this.Text = "OpenAL Parrot (" + (IntPtr.Size == 4 ? "x86" : "x64") + ")";
// Add available capture devices to the combo box.
IList<string> recorders = AudioCapture.AvailableDevices;
for (int i = 0; i < recorders.Count; i++)
{
if (!String.IsNullOrEmpty(recorders[i]))
comboBox_RecorderSelection.Items.Add(recorders[i]);
}
if (comboBox_RecorderSelection.Items.Count > 0)
comboBox_RecorderSelection.SelectedIndex = 0;
}
#endregion
#region Events
private void button_Start_Click(object sender, EventArgs e)
{
if (audio_capture == null || !audio_capture.IsRunning)
{
button_Start.Text = "Stop Recording";
groupBox_RecorderParameters.Enabled = false;
this.StartRecording();
}
else
{
button_Start.Text = "Start Recording";
groupBox_RecorderParameters.Enabled = true;
this.StopRecording();
}
}
private void timer_UpdateSamples_Tick(object sender, EventArgs e)
{
this.UpdateSamples();
}
private void Parrot_FormClosing(object sender, FormClosingEventArgs e)
{
this.StopRecording();
}
#endregion
#region Private Members
void StartRecording()
{
try
{
audio_context = new AudioContext();
}
catch (AudioException ae)
{
MessageBox.Show("Fatal: Cannot continue without a playback device.\nException caught when opening playback device.\n" + ae.Message);
Application.Exit();
}
AL.Listener(ALListenerf.Gain, (float)numericUpDown_PlaybackGain.Value);
src = AL.GenSource();
int sampling_rate = (int)numericUpDown_Frequency.Value;
double buffer_length_ms = (double)numericUpDown_BufferLength.Value;
int buffer_length_samples = (int)((double)numericUpDown_BufferLength.Value * sampling_rate * 0.001 / BlittableValueType.StrideOf(buffer));
try
{
audio_capture = new AudioCapture((string)comboBox_RecorderSelection.SelectedItem,
sampling_rate, ALFormat.Mono16, buffer_length_samples);
}
catch (AudioDeviceException ade)
{
MessageBox.Show("Exception caught when opening recording device.\n" + ade.Message);
audio_capture = null;
}
if (audio_capture == null)
return;
audio_capture.Start();
timer_GetSamples.Start();
timer_GetSamples.Interval = (int)(buffer_length_ms / 2 + 0.5); // Tick when half the buffer is full.
}
void StopRecording()
{
timer_GetSamples.Stop();
if (audio_capture != null)
{
audio_capture.Stop();
audio_capture.Dispose();
audio_capture = null;
}
if (audio_context != null)
{
int r;
AL.GetSource(src, ALGetSourcei.BuffersQueued, out r);
ClearBuffers(r);
AL.DeleteSource(src);
audio_context.Dispose();
audio_context = null;
}
}
void UpdateSamples()
{
if (audio_capture == null)
return;
int available_samples = audio_capture.AvailableSamples;
if (available_samples * SampleToByte > buffer.Length * BlittableValueType.StrideOf(buffer))
{
buffer = new short[MathHelper.NextPowerOfTwo(
(int)(available_samples * SampleToByte / (double)BlittableValueType.StrideOf(buffer) + 0.5))];
}
if (available_samples > 0)
{
audio_capture.ReadSamples(buffer, available_samples);
int buf = AL.GenBuffer();
AL.BufferData(buf, ALFormat.Mono16, buffer, (int)(available_samples * BlittableValueType.StrideOf(buffer)), audio_capture.SampleFrequency);
AL.SourceQueueBuffer(src, buf);
label_SamplesConsumed.Text = "Samples consumed: " + available_samples;
if (AL.GetSourceState(src) != ALSourceState.Playing)
AL.SourcePlay(src);
}
ClearBuffers(0);
}
void ClearBuffers(int input)
{
if (audio_context == null || audio_context == null)
return;
int[] freedbuffers;
if (input == 0)
{
int BuffersProcessed;
AL.GetSource(src, ALGetSourcei.BuffersProcessed, out BuffersProcessed);
if (BuffersProcessed == 0)
return;
freedbuffers = AL.SourceUnqueueBuffers(src, BuffersProcessed);
}
else
{
freedbuffers = AL.SourceUnqueueBuffers(src, input);
}
AL.DeleteBuffers(freedbuffers);
}
#endregion
#region Main
[STAThread]
static void Main()
{
using (Parrot parrot = new Parrot())
{
parrot.ShowDialog();
}
}
#endregion
}
}