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| 1 /* | |
| 2 * Copyright 2017 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 "WebRTC/RTCMTLVideoView.h" | |
| 12 | |
| 13 #import <Metal/Metal.h> | |
| 14 #import <MetalKit/MetalKit.h> | |
| 15 | |
| 16 #import "WebRTC/RTCLogging.h" | |
| 17 #import "WebRTC/RTCVideoFrame.h" | |
| 18 | |
| 19 #import "RTCMTLNV12Renderer.h" | |
| 20 | |
| 21 @interface RTCMTLVideoView () <MTKViewDelegate> | |
| 22 @property(nonatomic, strong) id<RTCMTLRenderer> renderer; | |
| 23 @property(nonatomic, strong) MTKView *metalView; | |
| 24 @property(atomic, strong) RTCVideoFrame *videoFrame; | |
| 25 @end | |
| 26 | |
| 27 @implementation RTCMTLVideoView { | |
| 28 id<RTCMTLRenderer> _renderer; | |
| 29 } | |
| 30 | |
| 31 @synthesize renderer = _renderer; | |
| 32 @synthesize metalView = _metalView; | |
| 33 @synthesize videoFrame = _videoFrame; | |
| 34 | |
| 35 - (instancetype)initWithFrame:(CGRect)frameRect { | |
| 36 self = [super initWithFrame:frameRect]; | |
| 37 if (self) { | |
| 38 [self configure]; | |
| 39 } | |
| 40 return self; | |
| 41 } | |
| 42 | |
| 43 - (instancetype)initWithCoder:(NSCoder *)aCoder { | |
| 44 self = [super initWithCoder:aCoder]; | |
| 45 if (self) { | |
| 46 [self configure]; | |
| 47 } | |
| 48 return self; | |
| 49 } | |
| 50 | |
| 51 #pragma mark - Private | |
| 52 | |
| 53 + (BOOL)isMetalAvailable { | |
| 54 #if defined(__OBJC__) && COREVIDEO_SUPPORTS_METAL | |
| 55 return YES; | |
| 56 #elif | |
| 57 return NO; | |
| 58 #endif | |
| 59 } | |
| 60 | |
| 61 - (void)configure { | |
| 62 if ([RTCMTLVideoView isMetalAvailable]) { | |
| 63 _metalView = [[MTKView alloc] initWithFrame:self.bounds]; | |
| 64 [self addSubview:_metalView]; | |
| 65 _metalView.delegate = self; | |
| 66 _metalView.contentMode = UIViewContentModeScaleAspectFit; | |
| 67 _metalView.translatesAutoresizingMaskIntoConstraints = NO; | |
| 68 UILayoutGuide *margins = self.layoutMarginsGuide; | |
| 69 [_metalView.topAnchor constraintEqualToAnchor:margins.topAnchor].active = YE
S; | |
| 70 [_metalView.bottomAnchor constraintEqualToAnchor:margins.bottomAnchor].activ
e = YES; | |
| 71 [_metalView.leftAnchor constraintEqualToAnchor:margins.leftAnchor].active =
YES; | |
| 72 [_metalView.rightAnchor constraintEqualToAnchor:margins.rightAnchor].active
= YES; | |
| 73 | |
| 74 _renderer = [[RTCMTLNV12Renderer alloc] init]; | |
| 75 if (![(RTCMTLNV12Renderer *)_renderer addRenderingDestination:_metalView]) { | |
| 76 _renderer = nil; | |
| 77 }; | |
| 78 } else { | |
| 79 RTCLogError("Metal configuration falied."); | |
| 80 } | |
| 81 } | |
| 82 #pragma mark - MTKViewDelegate methods | |
| 83 | |
| 84 - (void)drawInMTKView:(nonnull MTKView *)view { | |
| 85 NSAssert(view == self.metalView, @"Receiving draw callbacks from foreign insta
nce."); | |
| 86 [_renderer drawFrame:self.videoFrame]; | |
| 87 } | |
| 88 | |
| 89 - (void)mtkView:(MTKView *)view drawableSizeWillChange:(CGSize)size { | |
| 90 } | |
| 91 | |
| 92 #pragma mark - RTCVideoRenderer | |
| 93 | |
| 94 - (void)setSize:(CGSize)size { | |
| 95 _metalView.drawableSize = size; | |
| 96 [_metalView draw]; | |
| 97 } | |
| 98 | |
| 99 - (void)renderFrame:(nullable RTCVideoFrame *)frame { | |
| 100 if (frame == nil) { | |
| 101 RTCLogInfo(@"Incoming frame is nil. Exiting render callback."); | |
| 102 return; | |
| 103 } | |
| 104 self.videoFrame = frame; | |
| 105 } | |
| 106 | |
| 107 @end | |
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Chromium Code Reviews
Issue 2711003004:
Revert of Add metal view, shaders and renderer. (Closed)
