/*
* Copyright (c) 2002-2008 LWJGL Project
* All rights reserved.
*
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* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
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*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of 'LWJGL' nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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package org.lwjgl.openal;
import java.nio.ByteBuffer;
import java.nio.IntBuffer;
import org.lwjgl.BufferUtils;
import org.lwjgl.LWJGLException;
import org.lwjgl.LWJGLUtil;
/**
* <p>
* The ALC11 class implements features in OpenAL 1.1, specifically
* ALC methods and properties.
* </p>
*
* @author Brian Matzon <brian@matzon.dk>
* @see ALC10
* @version $Revision: 2286 $
* $Id: ALC.java 2286 2006-03-23 19:32:21 +0000 (to, 23 mar 2006) matzon $
*/
public final class ALC11 {
public static final int ALC_DEFAULT_ALL_DEVICES_SPECIFIER = 0x1012;
public static final int ALC_ALL_DEVICES_SPECIFIER = 0x1013;
public static final int ALC_CAPTURE_DEVICE_SPECIFIER = 0x310;
public static final int ALC_CAPTURE_DEFAULT_DEVICE_SPECIFIER = 0x311;
public static final int ALC_CAPTURE_SAMPLES = 0x312;
public static final int ALC_MONO_SOURCES = 0x1010;
public static final int ALC_STEREO_SOURCES = 0x1011;
/**
* The alcCaptureOpenDevice function allows the application to connect to a capture
* device. To obtain a list of all available capture devices, use getCaptureDevices a list of all
* capture devices will be returned. Retrieving ALC_CAPTURE_DEVICE_SPECIFIER with a valid capture device specified will result
* in the name of that device being returned as a single string.
*
* If the function returns null, then no sound driver/device has been found, or the
* requested format could not be fulfilled.
* The "deviceName" argument is a string that requests a certain device or
* device configuration. If null is specified, the implementation will provide an
* implementation specific default. The "frequency" and "format" arguments specify the format that
* audio data will be presented to the application, and match the values that can be passed to
* alBufferData. The implementation is expected to convert and resample to this format on
* behalf of the application. The "buffersize" argument specifies the number of sample frames
* to buffer in the AL, for example, requesting a format of AL_FORMAT_STEREO16 and
* a buffer size of 1024 would require the AL to store up to 1024 * 4 bytes of audio data.
* Note that the implementation may use a larger buffer than requested if it needs to, but the
* implementation will set up a buffer of at least the requested size.
* Specifying a compressed or extension-supplied format may result in failure, even if the
* extension is supplied for rendering.
*
* <i>LWJGL SPECIFIC: the actual created device is managed internally in lwjgl</i>
*
* @param devicename Name of device to open for capture
* @param frequency Frequency of samples to capture
* @param format Format of samples to capture
* @param buffersize Size of buffer to capture to
* @return ALCdevice if it was possible to open a device
*/
public static ALCdevice alcCaptureOpenDevice(String devicename, int frequency, int format, int buffersize) {
long device_address = nalcCaptureOpenDevice(devicename, frequency, format, buffersize);
if(device_address != 0) {
ALCdevice device = new ALCdevice(device_address);
synchronized (ALC10.devices) {
ALC10.devices.put(new Long(device_address), device);
}
return device;
}
return null;
}
static native long nalcCaptureOpenDevice( String devicename, int frequency, int format, int buffersize);
/**
* The alcCaptureCloseDevice function allows the application to disconnect from a capture
* device.
*
* The return code will be true or false, indicating success or failure. If
* the device is null or invalid, an ALC_INVALID_DEVICE error will be generated.
* Once closed, a capture device is invalid.
* @return true if device was successfully closed
*/
public static boolean alcCaptureCloseDevice(ALCdevice device) {
boolean result = nalcCaptureCloseDevice(ALC10.getDevice(device));
synchronized (ALC10.devices) {
device.setInvalid();
ALC10.devices.remove(new Long(device.device));
}
return result;
}
static native boolean nalcCaptureCloseDevice(long device);
/**
* Once a capture device has been opened via alcCaptureOpenDevice, it is made to start
* recording audio via the alcCaptureStart entry point:
*
* Once started, the device will record audio to an internal ring buffer, the size of which was
* specified when opening the device.
* The application may query the capture device to discover how much data is currently
* available via the alcGetInteger with the ALC_CAPTURE_SAMPLES token. This will
* report the number of sample frames currently available.
*/
public static void alcCaptureStart(ALCdevice device) {
nalcCaptureStart(ALC10.getDevice(device));
}
static native void nalcCaptureStart(long device);
/**
* If the application doesn't need to capture more audio for an amount of time, they can halt
* the device without closing it via the alcCaptureStop entry point.
* The implementation is encouraged to optimize for this case. The amount of audio
* samples available after restarting a stopped capture device is reset to zero. The
* application does not need to stop the capture device to read from it.
*/
public static void alcCaptureStop(ALCdevice device) {
nalcCaptureStop(ALC10.getDevice(device));
}
static native void nalcCaptureStop(long device);
/**
* When the application feels there are enough samples available to process, it can obtain
* them from the AL via the alcCaptureSamples entry point.
*
* The "buffer" argument specifies an application-allocated buffer that can contain at least
* "samples" sample frames. The implementation may defer conversion and resampling until
* this point. Requesting more sample frames than are currently available is an error.
*
* @param buffer Buffer to store samples in
* @param samples Number of samples to request
*/
public static void alcCaptureSamples(ALCdevice device, ByteBuffer buffer, int samples ) {
nalcCaptureSamples(ALC10.getDevice(device), buffer, buffer.position(), samples);
}
static native void nalcCaptureSamples(long device, ByteBuffer buffer, int position, int samples );
static native void initNativeStubs() throws LWJGLException;
/**
* Initializes ALC11, including any extensions
* @return true if initialization was successfull
*/
static boolean initialize() {
try {
IntBuffer ib = BufferUtils.createIntBuffer(2);
ALC10.alcGetInteger(AL.getDevice(), ALC10.ALC_MAJOR_VERSION, ib);
ib.position(1);
ALC10.alcGetInteger(AL.getDevice(), ALC10.ALC_MINOR_VERSION, ib);
int major = ib.get(0);
int minor = ib.get(1);
// checking for version 1.x+
if(major >= 1) {
// checking for version 1.1+
if(major > 1 || minor >= 1) {
ALC11.initNativeStubs();
AL11.initNativeStubs();
}
}
} catch (LWJGLException le) {
LWJGLUtil.log("failed to initialize ALC11: " + le);
return false;
}
return true;
}
}