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123 lines
3.4 KiB
123 lines
3.4 KiB
4 months ago
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/*
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* Copyright 2017 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#import "RTCMTLNSVideoView.h"
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#import <Metal/Metal.h>
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#import <MetalKit/MetalKit.h>
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#import "base/RTCVideoFrame.h"
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#import "RTCMTLI420Renderer.h"
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@interface RTC_OBJC_TYPE (RTCMTLNSVideoView)
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()<MTKViewDelegate> @property(nonatomic) id<RTCMTLRenderer> renderer;
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@property(nonatomic, strong) MTKView *metalView;
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@property(atomic, strong) RTC_OBJC_TYPE(RTCVideoFrame) * videoFrame;
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@end
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@implementation RTC_OBJC_TYPE (RTCMTLNSVideoView) {
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id<RTCMTLRenderer> _renderer;
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}
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@synthesize delegate = _delegate;
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@synthesize renderer = _renderer;
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@synthesize metalView = _metalView;
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@synthesize videoFrame = _videoFrame;
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- (instancetype)initWithFrame:(CGRect)frameRect {
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self = [super initWithFrame:frameRect];
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if (self) {
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[self configure];
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}
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return self;
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}
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- (instancetype)initWithCoder:(NSCoder *)aCoder {
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self = [super initWithCoder:aCoder];
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if (self) {
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[self configure];
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}
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return self;
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}
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#pragma mark - Private
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+ (BOOL)isMetalAvailable {
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return [MTLCopyAllDevices() count] > 0;
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}
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- (void)configure {
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if ([[self class] isMetalAvailable]) {
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_metalView = [[MTKView alloc] initWithFrame:self.bounds];
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[self addSubview:_metalView];
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_metalView.layerContentsPlacement = NSViewLayerContentsPlacementScaleProportionallyToFit;
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_metalView.translatesAutoresizingMaskIntoConstraints = NO;
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_metalView.framebufferOnly = YES;
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_metalView.delegate = self;
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_renderer = [[RTCMTLI420Renderer alloc] init];
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if (![(RTCMTLI420Renderer *)_renderer addRenderingDestination:_metalView]) {
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_renderer = nil;
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};
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}
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}
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- (void)updateConstraints {
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NSDictionary *views = NSDictionaryOfVariableBindings(_metalView);
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NSArray *constraintsHorizontal =
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[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-0-[_metalView]-0-|"
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options:0
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metrics:nil
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views:views];
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[self addConstraints:constraintsHorizontal];
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NSArray *constraintsVertical =
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[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-0-[_metalView]-0-|"
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options:0
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metrics:nil
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views:views];
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[self addConstraints:constraintsVertical];
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[super updateConstraints];
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}
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#pragma mark - MTKViewDelegate methods
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- (void)drawInMTKView:(nonnull MTKView *)view {
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if (self.videoFrame == nil) {
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return;
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}
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if (view == self.metalView) {
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[_renderer drawFrame:self.videoFrame];
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}
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}
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- (void)mtkView:(MTKView *)view drawableSizeWillChange:(CGSize)size {
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}
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#pragma mark - RTC_OBJC_TYPE(RTCVideoRenderer)
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- (void)setSize:(CGSize)size {
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_metalView.drawableSize = size;
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dispatch_async(dispatch_get_main_queue(), ^{
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[self.delegate videoView:self didChangeVideoSize:size];
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});
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[_metalView draw];
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}
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- (void)renderFrame:(nullable RTC_OBJC_TYPE(RTCVideoFrame) *)frame {
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if (frame == nil) {
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return;
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}
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self.videoFrame = [frame newI420VideoFrame];
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}
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@end
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