talk/app/webrtc/java/android/org/webrtc/EglBase.java - platform/external/webrtc - Git at Google

 /*
  * libjingle
  * Copyright 2015 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. 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.
  *  3. The name of the author may not be used to endorse or promote products
  *     derived from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 package org.webrtc;

 import android.opengl.EGL14;
 import android.opengl.EGLConfig;
 import android.opengl.EGLContext;
 import android.opengl.EGLDisplay;
 import android.opengl.EGLSurface;
 import android.util.Log;
 import android.view.Surface;

 /**
  * Holds EGL state and utility methods for handling an EGLContext, an EGLDisplay, and an EGLSurface.
  */
 public final class EglBase {
   private static final String TAG = "EglBase";
   private static final int EGL14_SDK_VERSION = android.os.Build.VERSION_CODES.JELLY_BEAN_MR1;
   private static final int CURRENT_SDK_VERSION = android.os.Build.VERSION.SDK_INT;
   // Android-specific extension.
   private static final int EGL_RECORDABLE_ANDROID = 0x3142;

   private EGLContext eglContext;
   private ConfigType configType;
   private EGLConfig eglConfig;
   private EGLDisplay eglDisplay;
   private EGLSurface eglSurface = EGL14.EGL_NO_SURFACE;

   public static boolean isEGL14Supported() {
     Log.d(TAG, "SDK version: " + CURRENT_SDK_VERSION);
     return (CURRENT_SDK_VERSION >= EGL14_SDK_VERSION);
   }

   // EGLConfig constructor type. Influences eglChooseConfig arguments.
   public static enum ConfigType {
     // No special parameters.
     PLAIN,
     // Configures with EGL_SURFACE_TYPE = EGL_PBUFFER_BIT.
     PIXEL_BUFFER,
     // Configures with EGL_RECORDABLE_ANDROID = 1.
     // Discourages EGL from using pixel formats that cannot efficiently be
     // converted to something usable by the video encoder.
     RECORDABLE
   }

   // Create root context without any EGLSurface or parent EGLContext. This can be used for branching
   // new contexts that share data.
   public EglBase() {
     this(EGL14.EGL_NO_CONTEXT, ConfigType.PLAIN);
   }

   // Create a new context with the specified config type, sharing data with sharedContext.
   public EglBase(EGLContext sharedContext, ConfigType configType) {
     this.configType = configType;
     eglDisplay = getEglDisplay();
     eglConfig = getEglConfig(eglDisplay, configType);
     eglContext = createEglContext(sharedContext, eglDisplay, eglConfig);
   }

   // Create EGLSurface from the Android Surface.
   public void createSurface(Surface surface) {
     checkIsNotReleased();
     if (configType == ConfigType.PIXEL_BUFFER) {
       Log.w(TAG, "This EGL context is configured for PIXEL_BUFFER, but uses regular Surface");
     }
     if (eglSurface != EGL14.EGL_NO_SURFACE) {
       throw new RuntimeException("Already has an EGLSurface");
     }
     int[] surfaceAttribs = {EGL14.EGL_NONE};
     eglSurface = EGL14.eglCreateWindowSurface(eglDisplay, eglConfig, surface, surfaceAttribs, 0);
     if (eglSurface == EGL14.EGL_NO_SURFACE) {
       throw new RuntimeException("Failed to create window surface");
     }
   }

   // Create dummy 1x1 pixel buffer surface so the context can be made current.
   public void createDummyPbufferSurface() {
     checkIsNotReleased();
     if (configType != ConfigType.PIXEL_BUFFER) {
       throw new RuntimeException(
           "This EGL context is not configured to use a pixel buffer: " + configType);
     }
     if (eglSurface != EGL14.EGL_NO_SURFACE) {
       throw new RuntimeException("Already has an EGLSurface");
     }
     int[] surfaceAttribs = {EGL14.EGL_WIDTH, 1, EGL14.EGL_HEIGHT, 1, EGL14.EGL_NONE};
     eglSurface = EGL14.eglCreatePbufferSurface(eglDisplay, eglConfig, surfaceAttribs, 0);
     if (eglSurface == EGL14.EGL_NO_SURFACE) {
       throw new RuntimeException("Failed to create pixel buffer surface");
     }
   }

   public EGLContext getContext() {
     return eglContext;
   }

   public boolean hasSurface() {
     return eglSurface != EGL14.EGL_NO_SURFACE;
   }

   public void releaseSurface() {
     if (eglSurface != EGL14.EGL_NO_SURFACE) {
       EGL14.eglDestroySurface(eglDisplay, eglSurface);
       eglSurface = EGL14.EGL_NO_SURFACE;
     }
   }

   private void checkIsNotReleased() {
     if (eglDisplay == EGL14.EGL_NO_DISPLAY || eglContext == EGL14.EGL_NO_CONTEXT
         || eglConfig == null) {
       throw new RuntimeException("This object has been released");
     }
   }

   public void release() {
     checkIsNotReleased();
     releaseSurface();
     // Release our context.
     EGL14.eglMakeCurrent(
         eglDisplay, EGL14.EGL_NO_SURFACE, EGL14.EGL_NO_SURFACE, EGL14.EGL_NO_CONTEXT);
     EGL14.eglDestroyContext(eglDisplay, eglContext);
     EGL14.eglReleaseThread();
     EGL14.eglTerminate(eglDisplay);
     eglContext = EGL14.EGL_NO_CONTEXT;
     eglDisplay = EGL14.EGL_NO_DISPLAY;
     eglConfig = null;
   }

   public void makeCurrent() {
     checkIsNotReleased();
     if (eglSurface == EGL14.EGL_NO_SURFACE) {
       throw new RuntimeException("No EGLSurface - can't make current");
     }
     if (!EGL14.eglMakeCurrent(eglDisplay, eglSurface, eglSurface, eglContext)) {
       throw new RuntimeException("eglMakeCurrent failed");
     }
   }

   public void swapBuffers() {
     checkIsNotReleased();
     if (eglSurface == EGL14.EGL_NO_SURFACE) {
       throw new RuntimeException("No EGLSurface - can't swap buffers");
     }
     EGL14.eglSwapBuffers(eglDisplay, eglSurface);
   }

   // Return an EGLDisplay, or die trying.
   private static EGLDisplay getEglDisplay() {
     EGLDisplay eglDisplay = EGL14.eglGetDisplay(EGL14.EGL_DEFAULT_DISPLAY);
     if (eglDisplay == EGL14.EGL_NO_DISPLAY) {
       throw new RuntimeException("Unable to get EGL14 display");
     }
     int[] version = new int[2];
     if (!EGL14.eglInitialize(eglDisplay, version, 0, version, 1)) {
       throw new RuntimeException("Unable to initialize EGL14");
     }
     return eglDisplay;
   }

   // Return an EGLConfig, or die trying.
   private static EGLConfig getEglConfig(EGLDisplay eglDisplay, ConfigType configType) {
     // Always RGB888, GLES2.
     int[] configAttributes = {
       EGL14.EGL_RED_SIZE, 8,
       EGL14.EGL_GREEN_SIZE, 8,
       EGL14.EGL_BLUE_SIZE, 8,
       EGL14.EGL_RENDERABLE_TYPE, EGL14.EGL_OPENGL_ES2_BIT,
       EGL14.EGL_NONE, 0,  // Allocate dummy fields for specific options.
       EGL14.EGL_NONE
     };

     // Fill in dummy fields based on configType.
     switch (configType) {
       case PLAIN:
         break;
       case PIXEL_BUFFER:
         configAttributes[configAttributes.length - 3] = EGL14.EGL_SURFACE_TYPE;
         configAttributes[configAttributes.length - 2] = EGL14.EGL_PBUFFER_BIT;
         break;
       case RECORDABLE:
         configAttributes[configAttributes.length - 3] = EGL_RECORDABLE_ANDROID;
         configAttributes[configAttributes.length - 2] = 1;
         break;
       default:
         throw new IllegalArgumentException();
     }

     EGLConfig[] configs = new EGLConfig[1];
     int[] numConfigs = new int[1];
     if (!EGL14.eglChooseConfig(
         eglDisplay, configAttributes, 0, configs, 0, configs.length, numConfigs, 0)) {
       throw new RuntimeException("Unable to find RGB888 " + configType + " EGL config");
     }
     return configs[0];
   }

   // Return an EGLConfig, or die trying.
   private static EGLContext createEglContext(
       EGLContext sharedContext, EGLDisplay eglDisplay, EGLConfig eglConfig) {
     int[] contextAttributes = {EGL14.EGL_CONTEXT_CLIENT_VERSION, 2, EGL14.EGL_NONE};
     EGLContext eglContext =
         EGL14.eglCreateContext(eglDisplay, eglConfig, sharedContext, contextAttributes, 0);
     if (eglContext == EGL14.EGL_NO_CONTEXT) {
       throw new RuntimeException("Failed to create EGL context");
     }
     return eglContext;
   }
 }
	/*
	* libjingle
	* Copyright 2015 Google Inc.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are met:
	*
	* 1. Redistributions of source code must retain the above copyright notice,
	* this list of conditions and the following disclaimer.
	* 2. 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.
	* 3. The name of the author may not be used to endorse or promote products
	* derived from this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
	* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
	* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	package org.webrtc;

	import android.opengl.EGL14;
	import android.opengl.EGLConfig;
	import android.opengl.EGLContext;
	import android.opengl.EGLDisplay;
	import android.opengl.EGLSurface;
	import android.util.Log;
	import android.view.Surface;

	/**
	* Holds EGL state and utility methods for handling an EGLContext, an EGLDisplay, and an EGLSurface.
	*/
	public final class EglBase {
	private static final String TAG = "EglBase";
	private static final int EGL14_SDK_VERSION = android.os.Build.VERSION_CODES.JELLY_BEAN_MR1;
	private static final int CURRENT_SDK_VERSION = android.os.Build.VERSION.SDK_INT;
	// Android-specific extension.
	private static final int EGL_RECORDABLE_ANDROID = 0x3142;

	private EGLContext eglContext;
	private ConfigType configType;
	private EGLConfig eglConfig;
	private EGLDisplay eglDisplay;
	private EGLSurface eglSurface = EGL14.EGL_NO_SURFACE;

	public static boolean isEGL14Supported() {
	Log.d(TAG, "SDK version: " + CURRENT_SDK_VERSION);
	return (CURRENT_SDK_VERSION >= EGL14_SDK_VERSION);
	}

	// EGLConfig constructor type. Influences eglChooseConfig arguments.
	public static enum ConfigType {
	// No special parameters.
	PLAIN,
	// Configures with EGL_SURFACE_TYPE = EGL_PBUFFER_BIT.
	PIXEL_BUFFER,
	// Configures with EGL_RECORDABLE_ANDROID = 1.
	// Discourages EGL from using pixel formats that cannot efficiently be
	// converted to something usable by the video encoder.
	RECORDABLE
	}

	// Create root context without any EGLSurface or parent EGLContext. This can be used for branching
	// new contexts that share data.
	public EglBase() {
	this(EGL14.EGL_NO_CONTEXT, ConfigType.PLAIN);
	}

	// Create a new context with the specified config type, sharing data with sharedContext.
	public EglBase(EGLContext sharedContext, ConfigType configType) {
	this.configType = configType;
	eglDisplay = getEglDisplay();
	eglConfig = getEglConfig(eglDisplay, configType);
	eglContext = createEglContext(sharedContext, eglDisplay, eglConfig);
	}

	// Create EGLSurface from the Android Surface.
	public void createSurface(Surface surface) {
	checkIsNotReleased();
	if (configType == ConfigType.PIXEL_BUFFER) {
	Log.w(TAG, "This EGL context is configured for PIXEL_BUFFER, but uses regular Surface");
	}
	if (eglSurface != EGL14.EGL_NO_SURFACE) {
	throw new RuntimeException("Already has an EGLSurface");
	}
	int[] surfaceAttribs = {EGL14.EGL_NONE};
	eglSurface = EGL14.eglCreateWindowSurface(eglDisplay, eglConfig, surface, surfaceAttribs, 0);
	if (eglSurface == EGL14.EGL_NO_SURFACE) {
	throw new RuntimeException("Failed to create window surface");
	}
	}

	// Create dummy 1x1 pixel buffer surface so the context can be made current.
	public void createDummyPbufferSurface() {
	checkIsNotReleased();
	if (configType != ConfigType.PIXEL_BUFFER) {
	throw new RuntimeException(
	"This EGL context is not configured to use a pixel buffer: " + configType);
	}
	if (eglSurface != EGL14.EGL_NO_SURFACE) {
	throw new RuntimeException("Already has an EGLSurface");
	}
	int[] surfaceAttribs = {EGL14.EGL_WIDTH, 1, EGL14.EGL_HEIGHT, 1, EGL14.EGL_NONE};
	eglSurface = EGL14.eglCreatePbufferSurface(eglDisplay, eglConfig, surfaceAttribs, 0);
	if (eglSurface == EGL14.EGL_NO_SURFACE) {
	throw new RuntimeException("Failed to create pixel buffer surface");
	}
	}

	public EGLContext getContext() {
	return eglContext;
	}

	public boolean hasSurface() {
	return eglSurface != EGL14.EGL_NO_SURFACE;
	}

	public void releaseSurface() {
	if (eglSurface != EGL14.EGL_NO_SURFACE) {
	EGL14.eglDestroySurface(eglDisplay, eglSurface);
	eglSurface = EGL14.EGL_NO_SURFACE;
	}
	}

	private void checkIsNotReleased() {
	if (eglDisplay == EGL14.EGL_NO_DISPLAY \|\| eglContext == EGL14.EGL_NO_CONTEXT
	\|\| eglConfig == null) {
	throw new RuntimeException("This object has been released");
	}
	}

	public void release() {
	checkIsNotReleased();
	releaseSurface();
	// Release our context.
	EGL14.eglMakeCurrent(
	eglDisplay, EGL14.EGL_NO_SURFACE, EGL14.EGL_NO_SURFACE, EGL14.EGL_NO_CONTEXT);
	EGL14.eglDestroyContext(eglDisplay, eglContext);
	EGL14.eglReleaseThread();
	EGL14.eglTerminate(eglDisplay);
	eglContext = EGL14.EGL_NO_CONTEXT;
	eglDisplay = EGL14.EGL_NO_DISPLAY;
	eglConfig = null;
	}

	public void makeCurrent() {
	checkIsNotReleased();
	if (eglSurface == EGL14.EGL_NO_SURFACE) {
	throw new RuntimeException("No EGLSurface - can't make current");
	}
	if (!EGL14.eglMakeCurrent(eglDisplay, eglSurface, eglSurface, eglContext)) {
	throw new RuntimeException("eglMakeCurrent failed");
	}
	}

	public void swapBuffers() {
	checkIsNotReleased();
	if (eglSurface == EGL14.EGL_NO_SURFACE) {
	throw new RuntimeException("No EGLSurface - can't swap buffers");
	}
	EGL14.eglSwapBuffers(eglDisplay, eglSurface);
	}

	// Return an EGLDisplay, or die trying.
	private static EGLDisplay getEglDisplay() {
	EGLDisplay eglDisplay = EGL14.eglGetDisplay(EGL14.EGL_DEFAULT_DISPLAY);
	if (eglDisplay == EGL14.EGL_NO_DISPLAY) {
	throw new RuntimeException("Unable to get EGL14 display");
	}
	int[] version = new int[2];
	if (!EGL14.eglInitialize(eglDisplay, version, 0, version, 1)) {
	throw new RuntimeException("Unable to initialize EGL14");
	}
	return eglDisplay;
	}

	// Return an EGLConfig, or die trying.
	private static EGLConfig getEglConfig(EGLDisplay eglDisplay, ConfigType configType) {
	// Always RGB888, GLES2.
	int[] configAttributes = {
	EGL14.EGL_RED_SIZE, 8,
	EGL14.EGL_GREEN_SIZE, 8,
	EGL14.EGL_BLUE_SIZE, 8,
	EGL14.EGL_RENDERABLE_TYPE, EGL14.EGL_OPENGL_ES2_BIT,
	EGL14.EGL_NONE, 0, // Allocate dummy fields for specific options.
	EGL14.EGL_NONE
	};

	// Fill in dummy fields based on configType.
	switch (configType) {
	case PLAIN:
	break;
	case PIXEL_BUFFER:
	configAttributes[configAttributes.length - 3] = EGL14.EGL_SURFACE_TYPE;
	configAttributes[configAttributes.length - 2] = EGL14.EGL_PBUFFER_BIT;
	break;
	case RECORDABLE:
	configAttributes[configAttributes.length - 3] = EGL_RECORDABLE_ANDROID;
	configAttributes[configAttributes.length - 2] = 1;
	break;
	default:
	throw new IllegalArgumentException();
	}

	EGLConfig[] configs = new EGLConfig[1];
	int[] numConfigs = new int[1];
	if (!EGL14.eglChooseConfig(
	eglDisplay, configAttributes, 0, configs, 0, configs.length, numConfigs, 0)) {
	throw new RuntimeException("Unable to find RGB888 " + configType + " EGL config");
	}
	return configs[0];
	}

	// Return an EGLConfig, or die trying.
	private static EGLContext createEglContext(
	EGLContext sharedContext, EGLDisplay eglDisplay, EGLConfig eglConfig) {
	int[] contextAttributes = {EGL14.EGL_CONTEXT_CLIENT_VERSION, 2, EGL14.EGL_NONE};
	EGLContext eglContext =
	EGL14.eglCreateContext(eglDisplay, eglConfig, sharedContext, contextAttributes, 0);
	if (eglContext == EGL14.EGL_NO_CONTEXT) {
	throw new RuntimeException("Failed to create EGL context");
	}
	return eglContext;
	}
	}