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https://github.com/mollyim/webrtc.git
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c4a14324e2
Using layoutSubviews is a simpler solution to achieveing the desired effect. Plus this will get rid of warrnings on iOS 11 Bug: webrtc:8467 Change-Id: Idaa041b7a0ed889905d97f645408fb3437154e73 Reviewed-on: https://webrtc-review.googlesource.com/17380 Reviewed-by: Anders Carlsson <andersc@webrtc.org> Reviewed-by: Peter Hanspers <peterhanspers@webrtc.org> Commit-Queue: Daniela Jovanoska Petrenko <denicija@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20523}
153 lines
4 KiB
Objective-C
153 lines
4 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 "WebRTC/RTCVideoFrameBuffer.h"
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#import "RTCMTLI420Renderer.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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#define RTCMTLI420RendererClass NSClassFromString(@"RTCMTLI420Renderer")
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@interface RTCMTLVideoView () <MTKViewDelegate>
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@property(nonatomic, strong) RTCMTLI420Renderer *rendererI420;
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@property(nonatomic, strong) RTCMTLNV12Renderer *rendererNV12;
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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 rendererI420 = _rendererI420;
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@synthesize rendererNV12 = _rendererNV12;
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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 *)createNV12Renderer {
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return [[RTCMTLNV12RendererClass alloc] init];
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}
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+ (RTCMTLI420Renderer *)createI420Renderer {
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return [[RTCMTLI420RendererClass alloc] init];
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}
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- (void)configure {
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NSAssert([RTCMTLVideoView isMetalAvailable], @"Metal not availiable on this device");
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_metalView = [RTCMTLVideoView createMetalView:self.bounds];
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[self configureMetalView];
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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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}
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}
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#pragma mark - Private
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- (void)layoutSubviews {
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[super layoutSubviews];
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_metalView.frame = self.bounds;
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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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if (!self.videoFrame) {
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return;
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}
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id<RTCMTLRenderer> renderer = nil;
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if ([self.videoFrame.buffer isKindOfClass:[RTCCVPixelBuffer class]]) {
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if (!self.rendererNV12) {
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self.rendererNV12 = [RTCMTLVideoView createNV12Renderer];
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if (![self.rendererNV12 addRenderingDestination:self.metalView]) {
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self.rendererNV12 = nil;
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RTCLogError(@"Failed to create NV12 renderer");
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}
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}
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renderer = self.rendererNV12;
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} else {
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if (!self.rendererI420) {
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self.rendererI420 = [RTCMTLVideoView createI420Renderer];
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if (![self.rendererI420 addRenderingDestination:self.metalView]) {
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self.rendererI420 = nil;
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RTCLogError(@"Failed to create I420 renderer");
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}
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}
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renderer = self.rendererI420;
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}
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[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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}
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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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