154 lines
5.6 KiB
Java
154 lines
5.6 KiB
Java
/*
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* Copyright (c) 2002-2011 LWJGL Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of 'LWJGL' nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.lwjgl.opengl;
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import org.lwjgl.BufferChecks;
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import org.lwjgl.LWJGLUtil;
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import java.nio.ByteBuffer;
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import java.nio.IntBuffer;
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import java.nio.LongBuffer;
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/**
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* This class exposes the platform specific functionality present in the
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* NV_video_capture extension.
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*
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* @author Spasi
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* @since 20/5/2011
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*/
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public final class NVVideoCaptureUtil {
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private NVVideoCaptureUtil() {}
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private static void checkExtension() {
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if ( LWJGLUtil.CHECKS && !GLContext.getCapabilities().GL_NV_video_capture )
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throw new IllegalStateException("NV_video_capture is not supported");
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}
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private static ByteBuffer getPeerInfo() {
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return ContextGL.getCurrentContext().getPeerInfo().getHandle();
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}
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/**
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* After successfully locking a video capture device, use this method to bind it
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* to the capture slot specified in the current context. This method is the cross-
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* platform equivalent of glXBindVideoCaptureDeviceNV and wglBindVideoCaptureDeviceNV.
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*
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* @param video_slot the video slot
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* @param device the video capture device
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*
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* @return true if the binding was successful
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*/
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public static boolean glBindVideoCaptureDeviceNV(int video_slot, long device) {
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checkExtension();
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return nglBindVideoCaptureDeviceNV(getPeerInfo(), video_slot, device);
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}
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private static native boolean nglBindVideoCaptureDeviceNV(ByteBuffer peer_info, int video_slot, long device);
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/**
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* Enumerate the available video capture devices. This method is the cross-platform
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* equivalent of glXEnumerateVideoCaptureDevicesNV and wglEnumerateVideoCaptureDevicesNV.
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* Since they are not really compatible, this method works like the WGL version. That is,
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* you first call it with a null devices buffer, get the number of devices, then call it
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* again with an appropriately sized buffer.
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*
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* @param devices the buffer to store devices in
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*
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* @return the number of available video capture devices
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*/
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public static int glEnumerateVideoCaptureDevicesNV(LongBuffer devices) {
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checkExtension();
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if ( devices != null )
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BufferChecks.checkBuffer(devices, 1);
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return nglEnumerateVideoCaptureDevicesNV(getPeerInfo(), devices, devices == null ? 0 : devices.position());
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}
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private static native int nglEnumerateVideoCaptureDevicesNV(ByteBuffer peer_info, LongBuffer devices, int devices_position);
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/**
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* To lock a video capture device to a display connection, use this method.
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* Before using a video capture device, it must be locked. Once a
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* video capture device is locked by a process, no other process can
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* lock a video capture device with the same unique ID until the lock
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* is released or the process ends.
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*
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* @param device the device to lock
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*
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* @return true if the lock was successful
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*/
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public static boolean glLockVideoCaptureDeviceNV(long device) {
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checkExtension();
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return nglLockVideoCaptureDeviceNV(getPeerInfo(), device);
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}
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private static native boolean nglLockVideoCaptureDeviceNV(ByteBuffer peer_info, long device);
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/**
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* Use this method to query the unique ID of the physical device backing a
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* video capture device handle.
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*
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* @param device the device
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* @param attribute the attribute to query
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* @param value the buffer to store the value in
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*
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* @return true if the query was successful
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*/
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public static boolean glQueryVideoCaptureDeviceNV(long device, int attribute, IntBuffer value) {
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checkExtension();
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BufferChecks.checkBuffer(value, 1);
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return nglQueryVideoCaptureDeviceNV(getPeerInfo(), device, attribute, value, value.position());
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}
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private static native boolean nglQueryVideoCaptureDeviceNV(ByteBuffer peer_info, long device, int attribute, IntBuffer value, int value_position);
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/**
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* Use this method when finished capturing data on a locked video capture device
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* to unlock it.
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*
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* @param device the device
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*
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* @return true if the device was unlocked successfully
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*/
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public static boolean glReleaseVideoCaptureDeviceNV(long device) {
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checkExtension();
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return nglReleaseVideoCaptureDeviceNV(getPeerInfo(), device);
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}
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private static native boolean nglReleaseVideoCaptureDeviceNV(ByteBuffer peer_info, long device);
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}
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