1 /* 2 * libjingle 3 * Copyright 2014 Google Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #import <Foundation/Foundation.h> 29 #if TARGET_OS_IPHONE 30 #import <GLKit/GLKit.h> 31 #else 32 #import <AppKit/NSOpenGL.h> 33 #endif 34 35 @class RTCI420Frame; 36 37 // RTCOpenGLVideoRenderer issues appropriate OpenGL commands to draw a frame to 38 // the currently bound framebuffer. Supports OpenGL 3.2 and OpenGLES 2.0. OpenGL 39 // framebuffer creation and management should be handled elsewhere using the 40 // same context used to initialize this class. 41 @interface RTCOpenGLVideoRenderer : NSObject 42 43 // The last successfully drawn frame. Used to avoid drawing frames unnecessarily 44 // hence saving battery life by reducing load. 45 @property(nonatomic, readonly) RTCI420Frame* lastDrawnFrame; 46 47 #if TARGET_OS_IPHONE 48 - (instancetype)initWithContext:(EAGLContext*)context; 49 #else 50 - (instancetype)initWithContext:(NSOpenGLContext*)context; 51 #endif 52 53 // Draws |frame| onto the currently bound OpenGL framebuffer. |setupGL| must be 54 // called before this function will succeed. 55 - (BOOL)drawFrame:(RTCI420Frame*)frame; 56 57 // The following methods are used to manage OpenGL resources. On iOS 58 // applications should release resources when placed in background for use in 59 // the foreground application. In fact, attempting to call OpenGLES commands 60 // while in background will result in application termination. 61 62 // Sets up the OpenGL state needed for rendering. 63 - (void)setupGL; 64 // Tears down the OpenGL state created by |setupGL|. 65 - (void)teardownGL; 66 67 #ifndef DOXYGEN_SHOULD_SKIP_THIS 68 // Disallow init and don't add to documentation 69 - (id)init __attribute__(( 70 unavailable("init is not a supported initializer for this class."))); 71 #endif /* DOXYGEN_SHOULD_SKIP_THIS */ 72 73 @end 74
