denicija | 124a6fc | 2017-03-31 02:47:29 -0700 | [diff] [blame] | 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/RTCMTLNSVideoView.h" |
| 12 | |
| 13 | #import <Metal/Metal.h> |
| 14 | #import <MetalKit/MetalKit.h> |
| 15 | |
| 16 | #import "WebRTC/RTCVideoFrame.h" |
| 17 | |
| 18 | #import "RTCMTLI420Renderer.h" |
| 19 | |
denicija | d208815 | 2017-04-28 02:14:54 -0700 | [diff] [blame] | 20 | @interface RTCMTLNSVideoView ()<MTKViewDelegate> |
denicija | 124a6fc | 2017-03-31 02:47:29 -0700 | [diff] [blame] | 21 | @property(nonatomic) id<RTCMTLRenderer> renderer; |
| 22 | @property(nonatomic, strong) MTKView *metalView; |
| 23 | @property(atomic, strong) RTCVideoFrame *videoFrame; |
| 24 | @end |
| 25 | |
| 26 | @implementation RTCMTLNSVideoView { |
| 27 | id<RTCMTLRenderer> _renderer; |
| 28 | } |
| 29 | |
| 30 | @synthesize renderer = _renderer; |
| 31 | @synthesize metalView = _metalView; |
| 32 | @synthesize videoFrame = _videoFrame; |
| 33 | |
| 34 | - (instancetype)initWithFrame:(CGRect)frameRect { |
| 35 | self = [super initWithFrame:frameRect]; |
| 36 | if (self) { |
| 37 | [self configure]; |
| 38 | } |
| 39 | return self; |
| 40 | } |
| 41 | |
| 42 | - (instancetype)initWithCoder:(NSCoder *)aCoder { |
| 43 | self = [super initWithCoder:aCoder]; |
| 44 | if (self) { |
| 45 | [self configure]; |
| 46 | } |
| 47 | return self; |
| 48 | } |
| 49 | |
| 50 | #pragma mark - Private |
| 51 | |
| 52 | + (BOOL)isMetalAvailable { |
adam.fedor | 42742a5 | 2017-06-12 07:32:02 -0700 | [diff] [blame] | 53 | return [MTLCopyAllDevices() count] > 0; |
denicija | 124a6fc | 2017-03-31 02:47:29 -0700 | [diff] [blame] | 54 | } |
| 55 | |
| 56 | - (void)configure { |
| 57 | if ([[self class] isMetalAvailable]) { |
| 58 | _metalView = [[MTKView alloc] initWithFrame:self.bounds]; |
| 59 | [self addSubview:_metalView]; |
| 60 | _metalView.layerContentsPlacement = NSViewLayerContentsPlacementScaleProportionallyToFit; |
| 61 | _metalView.translatesAutoresizingMaskIntoConstraints = NO; |
| 62 | _metalView.framebufferOnly = YES; |
| 63 | _metalView.delegate = self; |
| 64 | |
| 65 | _renderer = [[RTCMTLI420Renderer alloc] init]; |
| 66 | if (![(RTCMTLI420Renderer *)_renderer addRenderingDestination:_metalView]) { |
| 67 | _renderer = nil; |
| 68 | }; |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | - (void)updateConstraints { |
| 73 | NSDictionary *views = NSDictionaryOfVariableBindings(_metalView); |
| 74 | |
| 75 | NSArray *constraintsHorizontal = |
| 76 | [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-0-[_metalView]-0-|" |
| 77 | options:0 |
| 78 | metrics:nil |
| 79 | views:views]; |
| 80 | [self addConstraints:constraintsHorizontal]; |
| 81 | |
| 82 | NSArray *constraintsVertical = |
| 83 | [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-0-[_metalView]-0-|" |
| 84 | options:0 |
| 85 | metrics:nil |
| 86 | views:views]; |
| 87 | [self addConstraints:constraintsVertical]; |
| 88 | [super updateConstraints]; |
| 89 | } |
| 90 | |
| 91 | #pragma mark - MTKViewDelegate methods |
| 92 | - (void)drawInMTKView:(nonnull MTKView *)view { |
denicija | d208815 | 2017-04-28 02:14:54 -0700 | [diff] [blame] | 93 | if (self.videoFrame == nil) { |
| 94 | return; |
| 95 | } |
denicija | 124a6fc | 2017-03-31 02:47:29 -0700 | [diff] [blame] | 96 | if (view == self.metalView) { |
| 97 | [_renderer drawFrame:self.videoFrame]; |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | - (void)mtkView:(MTKView *)view drawableSizeWillChange:(CGSize)size { |
| 102 | } |
| 103 | |
| 104 | #pragma mark - RTCVideoRenderer |
| 105 | |
| 106 | - (void)setSize:(CGSize)size { |
| 107 | _metalView.drawableSize = size; |
| 108 | [_metalView draw]; |
| 109 | } |
| 110 | |
| 111 | - (void)renderFrame:(nullable RTCVideoFrame *)frame { |
| 112 | if (frame == nil) { |
| 113 | return; |
| 114 | } |
| 115 | self.videoFrame = [frame newI420VideoFrame]; |
| 116 | } |
| 117 | |
| 118 | @end |