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| 1 /* | |
| 2 * Copyright 2015 The WebRTC project authors. All Rights Reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 #import "RTCOpenGLVideoRenderer.h" | |
| 12 | |
| 13 #import "RTCShader+Private.h" | |
| 14 #import "WebRTC/RTCVideoFrame.h" | |
| 15 | |
| 16 @implementation RTCOpenGLVideoRenderer { | |
| 17 GlContextType *_context; | |
| 18 BOOL _isInitialized; | |
| 19 id<RTCShader> _i420Shader; | |
| 20 id<RTCShader> _nv12Shader; | |
| 21 } | |
| 22 | |
| 23 @synthesize lastDrawnFrame = _lastDrawnFrame; | |
| 24 | |
| 25 + (void)initialize { | |
| 26 // Disable dithering for performance. | |
| 27 glDisable(GL_DITHER); | |
| 28 } | |
| 29 | |
| 30 - (instancetype)initWithContext:(GlContextType *)context { | |
| 31 NSAssert(context != nil, @"context cannot be nil"); | |
| 32 if (self = [super init]) { | |
| 33 _context = context; | |
| 34 } | |
| 35 return self; | |
| 36 } | |
| 37 | |
| 38 - (BOOL)drawFrame:(RTCVideoFrame *)frame { | |
| 39 if (!_isInitialized || !frame || frame == _lastDrawnFrame) { | |
| 40 return NO; | |
| 41 } | |
| 42 [self ensureGLContext]; | |
| 43 glClear(GL_COLOR_BUFFER_BIT); | |
| 44 id<RTCShader> shader = nil; | |
| 45 #if TARGET_OS_IPHONE | |
| 46 if (frame.nativeHandle) { | |
| 47 if (!_nv12Shader) { | |
| 48 _nv12Shader = [[RTCNativeNV12Shader alloc] initWithContext:_context]; | |
| 49 } | |
| 50 shader = _nv12Shader; | |
| 51 } else { | |
| 52 if (!_i420Shader) { | |
| 53 _i420Shader = [[RTCI420Shader alloc] initWithContext:_context]; | |
| 54 } | |
| 55 shader = _i420Shader; | |
| 56 } | |
| 57 #else | |
| 58 // Rendering native CVPixelBuffer is not supported on OS X. | |
| 59 frame = [frame newI420VideoFrame]; | |
| 60 if (!_i420Shader) { | |
| 61 _i420Shader = [[RTCI420Shader alloc] initWithContext:_context]; | |
| 62 } | |
| 63 shader = _i420Shader; | |
| 64 #endif | |
| 65 if (!shader || ![shader drawFrame:frame]) { | |
| 66 return NO; | |
| 67 } | |
| 68 | |
| 69 #if !TARGET_OS_IPHONE | |
| 70 [_context flushBuffer]; | |
| 71 #endif | |
| 72 _lastDrawnFrame = frame; | |
| 73 | |
| 74 return YES; | |
| 75 } | |
| 76 | |
| 77 - (void)setupGL { | |
| 78 if (_isInitialized) { | |
| 79 return; | |
| 80 } | |
| 81 [self ensureGLContext]; | |
| 82 _isInitialized = YES; | |
| 83 } | |
| 84 | |
| 85 - (void)teardownGL { | |
| 86 if (!_isInitialized) { | |
| 87 return; | |
| 88 } | |
| 89 [self ensureGLContext]; | |
| 90 _i420Shader = nil; | |
| 91 _nv12Shader = nil; | |
| 92 _isInitialized = NO; | |
| 93 } | |
| 94 | |
| 95 #pragma mark - Private | |
| 96 | |
| 97 - (void)ensureGLContext { | |
| 98 NSAssert(_context, @"context shouldn't be nil"); | |
| 99 #if TARGET_OS_IPHONE | |
| 100 if ([EAGLContext currentContext] != _context) { | |
| 101 [EAGLContext setCurrentContext:_context]; | |
| 102 } | |
| 103 #else | |
| 104 if ([NSOpenGLContext currentContext] != _context) { | |
| 105 [_context makeCurrentContext]; | |
| 106 } | |
| 107 #endif | |
| 108 } | |
| 109 | |
| 110 @end | |
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Chromium Code Reviews
Issue 2812613003:
ObjC: Remove RTCOpenGLVideoRenderer (Closed)
