0ebe0199ac
To properly test the functionality, following changes were needed - Make RTCMTLVideoView compiliable for all cpu architectures not just arm64. This is needed so that the test can run on any device and on simulator as well. - Refactor RTCMTLVideoView to have mockable class methods. The unittest class, RTCMTLVideoViewTests was designed to provide easy transition to XCTest when the time comes for that. To transition to XCTest it would suffice to inherit from XCTestCase and remove the gtest methods. BUG=webrtc:7079 Review-Url: https://codereview.webrtc.org/2723903003 Cr-Commit-Position: refs/heads/master@{#17014}
135 lines
3.6 KiB
Objective-C
135 lines
3.6 KiB
Objective-C
/*
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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 "WebRTC/RTCMTLVideoView.h"
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#import <Metal/Metal.h>
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#import <MetalKit/MetalKit.h>
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#import "WebRTC/RTCLogging.h"
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#import "WebRTC/RTCVideoFrame.h"
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#import "RTCMTLNV12Renderer.h"
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// To avoid unreconized symbol linker errors, we're taking advantage of the objc runtime.
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// Linking errors occur when compiling for architectures that don't support Metal.
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#define MTKViewClass NSClassFromString(@"MTKView")
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#define RTCMTLNV12RendererClass NSClassFromString(@"RTCMTLNV12Renderer")
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@interface RTCMTLVideoView () <MTKViewDelegate>
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@property(nonatomic, strong) RTCMTLNV12Renderer *renderer;
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@property(nonatomic, strong) MTKView *metalView;
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@property(atomic, strong) RTCVideoFrame *videoFrame;
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@end
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@implementation RTCMTLVideoView
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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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#if defined(RTC_SUPPORTS_METAL)
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return YES;
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#else
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return NO;
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#endif
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}
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+ (MTKView *)createMetalView:(CGRect)frame {
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MTKView *view = [[MTKViewClass alloc] initWithFrame:frame];
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return view;
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}
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+ (RTCMTLNV12Renderer *)createMetalRenderer {
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RTCMTLNV12Renderer *renderer = [[RTCMTLNV12RendererClass alloc] init];
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return renderer;
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}
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- (void)configure {
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if (![RTCMTLVideoView isMetalAvailable]) {
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RTCLog("Metal unavailable");
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return;
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}
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_metalView = [RTCMTLVideoView createMetalView:self.bounds];
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_renderer = [RTCMTLVideoView createMetalRenderer];
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if ([self configureMetalRenderer]) {
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[self configureMetalView];
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} else {
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_renderer = nil;
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RTCLogError("Metal configuration falied.");
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}
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}
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- (BOOL)configureMetalRenderer {
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return [_renderer addRenderingDestination:_metalView];
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}
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- (void)configureMetalView {
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if (_metalView) {
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_metalView.delegate = self;
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[self addSubview:_metalView];
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_metalView.contentMode = UIViewContentModeScaleAspectFit;
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_metalView.translatesAutoresizingMaskIntoConstraints = NO;
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UILayoutGuide *margins = self.layoutMarginsGuide;
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[_metalView.topAnchor constraintEqualToAnchor:margins.topAnchor].active = YES;
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[_metalView.bottomAnchor constraintEqualToAnchor:margins.bottomAnchor].active = YES;
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[_metalView.leftAnchor constraintEqualToAnchor:margins.leftAnchor].active = YES;
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[_metalView.rightAnchor constraintEqualToAnchor:margins.rightAnchor].active = YES;
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}
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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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NSAssert(view == self.metalView, @"Receiving draw callbacks from foreign instance.");
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[self.renderer drawFrame:self.videoFrame];
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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 - RTCVideoRenderer
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- (void)setSize:(CGSize)size {
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self.metalView.drawableSize = size;
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[self.metalView draw];
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}
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- (void)renderFrame:(nullable RTCVideoFrame *)frame {
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if (frame == nil) {
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RTCLogInfo(@"Incoming frame is nil. Exiting render callback.");
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return;
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}
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self.videoFrame = frame;
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}
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@end
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