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//
// SDLCarWindow.m
// Projection
//
// Originally created by Muller, Alexander (A.) on 10/6/16.
// Copyright © 2016 Ford Motor Company. All rights reserved.
//
// Updated by Joel Fischer, Livio Inc., on 11/27/17.
#import <CommonCrypto/CommonDigest.h>
#import <ImageIO/ImageIO.h>
#import <MobileCoreServices/MobileCoreServices.h>
#import "SDLCarWindow.h"
#import "SDLGlobals.h"
#import "SDLImageResolution.h"
#import "SDLLogMacros.h"
#import "SDLNotificationConstants.h"
#import "SDLError.h"
#import "SDLStateMachine.h"
#import "SDLStreamingMediaConfiguration.h"
#import "SDLStreamingVideoLifecycleManager.h"
#import "SDLStreamingVideoScaleManager.h"
#import "SDLStreamingMediaManagerConstants.h"
#import "SDLVideoStreamingCapability.h"
NS_ASSUME_NONNULL_BEGIN
@interface SDLCarWindow ()
@property (weak, nonatomic, nullable) SDLStreamingVideoLifecycleManager *streamManager;
@property (assign, nonatomic) SDLCarWindowRenderingType renderingType;
@property (assign, nonatomic) BOOL allowMultipleOrientations;
@property (assign, nonatomic, getter=isLockScreenPresenting) BOOL lockScreenPresenting;
@property (assign, nonatomic, getter=isLockScreenDismissing) BOOL lockScreenBeingDismissed;
@property (assign, nonatomic, getter=isVideoStreamStarted) BOOL videoStreamStarted;
@end
@implementation SDLCarWindow
- (instancetype)initWithStreamManager:(SDLStreamingVideoLifecycleManager *)streamManager configuration:(SDLStreamingMediaConfiguration *)configuration {
self = [super init];
if (!self) { return nil; }
_streamManager = streamManager;
_renderingType = configuration.carWindowRenderingType;
_allowMultipleOrientations = configuration.allowMultipleViewControllerOrientations;
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(sdl_didReceiveVideoStreamStarted:) name:SDLVideoStreamDidStartNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(sdl_didReceiveVideoStreamStopped:) name:SDLVideoStreamDidStopNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(sdl_willPresentLockScreenViewController:) name:SDLLockScreenManagerWillPresentLockScreenViewController object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(sdl_willDismissLockScreenViewController:) name:SDLLockScreenManagerWillDismissLockScreenViewController object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(sdl_didPresentLockScreenViewController:) name:SDLLockScreenManagerDidPresentLockScreenViewController object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(sdl_didDismissLockScreenViewController:) name:SDLLockScreenManagerDidDismissLockScreenViewController object:nil];
return self;
}
- (void)syncFrame {
if (!self.streamManager.isVideoConnected || self.streamManager.isVideoStreamingPaused) {
return;
}
if (self.isLockScreenPresenting || self.isLockScreenDismissing) {
SDLLogD(@"Paused CarWindow, lock screen moving");
return;
}
const CGRect bounds = self.streamManager.videoScaleManager.appViewportFrame;
if (bounds.size.width < 1) {
SDLLogD(@"CarWindow: Invalid viewport frame");
return;
}
UIGraphicsBeginImageContextWithOptions(bounds.size, YES, 1.0f);
switch (self.renderingType) {
case SDLCarWindowRenderingTypeLayer: {
[self.rootViewController.view.layer renderInContext:UIGraphicsGetCurrentContext()];
} break;
case SDLCarWindowRenderingTypeViewAfterScreenUpdates: {
[self.rootViewController.view drawViewHierarchyInRect:bounds afterScreenUpdates:YES];
} break;
case SDLCarWindowRenderingTypeViewBeforeScreenUpdates: {
[self.rootViewController.view drawViewHierarchyInRect:bounds afterScreenUpdates:NO];
} break;
}
UIImage *screenshot = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
CGImageRef imageRef = screenshot.CGImage;
CVPixelBufferRef pixelBuffer = [self.class sdl_createPixelBufferForImageRef:imageRef usingPool:self.streamManager.pixelBufferPool];
if (pixelBuffer != nil) {
BOOL success = [self.streamManager sendVideoData:pixelBuffer];
if (!success) {
SDLLogE(@"Video frame will not be sent because the video frame encoding failed");
return;
}
CVPixelBufferRelease(pixelBuffer);
} else {
SDLLogE(@"Video frame will not be sent because the pixelBuffer is nil");
}
}
#pragma mark - SDLNavigationLockScreenManager Notifications
- (void)sdl_willPresentLockScreenViewController:(NSNotification *)notification {
self.lockScreenPresenting = YES;
}
- (void)sdl_didPresentLockScreenViewController:(NSNotification *)notification {
self.lockScreenPresenting = NO;
}
- (void)sdl_willDismissLockScreenViewController:(NSNotification *)notification {
self.lockScreenBeingDismissed = YES;
}
- (void)sdl_didDismissLockScreenViewController:(NSNotification *)notification {
self.lockScreenBeingDismissed = NO;
}
#pragma mark - SDLNavigationLifecycleManager Notifications
- (void)sdl_didReceiveVideoStreamStarted:(NSNotification *)notification {
self.videoStreamStarted = true;
SDLLogD(@"Video stream started");
dispatch_async(dispatch_get_main_queue(), ^{
[self sdl_applyDisplayDimensionsToRootViewController:self.rootViewController];
});
}
- (void)sdl_didReceiveVideoStreamStopped:(NSNotification *)notification {
self.videoStreamStarted = false;
dispatch_async(dispatch_get_main_queue(), ^{
// And also reset the streamingViewController's frame, because we are about to show it.
self.rootViewController.view.frame = [UIScreen mainScreen].bounds;
SDLLogD(@"Video stream ended, setting view controller frame back: %@", NSStringFromCGRect(self.rootViewController.view.frame));
});
}
#pragma mark - Custom Accessors
- (void)setRootViewController:(nullable UIViewController *)rootViewController {
dispatch_async(dispatch_get_main_queue(), ^{
if (rootViewController == nil || !self.isVideoStreamStarted) {
self->_rootViewController = rootViewController;
return;
}
if (!self.allowMultipleOrientations
&& !(rootViewController.supportedInterfaceOrientations == UIInterfaceOrientationMaskPortrait ||
rootViewController.supportedInterfaceOrientations == UIInterfaceOrientationMaskLandscapeLeft ||
rootViewController.supportedInterfaceOrientations == UIInterfaceOrientationMaskLandscapeRight)) {
@throw [NSException sdl_carWindowOrientationException];
}
[self sdl_applyDisplayDimensionsToRootViewController:rootViewController];
self->_rootViewController = rootViewController;
});
}
#pragma mark - Private Helpers
+ (nullable CVPixelBufferRef)sdl_createPixelBufferForImageRef:(CGImageRef)imageRef usingPool:(CVPixelBufferPoolRef)pool {
size_t imageWidth = CGImageGetWidth(imageRef);
size_t imageHeight = CGImageGetHeight(imageRef);
CVPixelBufferRef pixelBuffer;
CVReturn result = CVPixelBufferPoolCreatePixelBuffer(kCFAllocatorDefault, pool, &pixelBuffer);
if (result != kCVReturnSuccess) {
return nil;
}
CVPixelBufferLockBaseAddress(pixelBuffer, 0);
void *data = CVPixelBufferGetBaseAddress(pixelBuffer);
CGColorSpaceRef rgbColorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef context = CGBitmapContextCreate(data, imageWidth, imageHeight, 8, CVPixelBufferGetBytesPerRow(pixelBuffer), rgbColorSpace, kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst);
CGContextDrawImage(context, CGRectMake(0, 0, imageWidth, imageHeight), imageRef);
CGColorSpaceRelease(rgbColorSpace);
CGContextRelease(context);
CVPixelBufferUnlockBaseAddress(pixelBuffer, 0);
return pixelBuffer;
}
/**
Sets the rootViewController's frame to the display's viewport dimensions.
@param rootViewController The view controller to resize
*/
- (void)sdl_applyDisplayDimensionsToRootViewController:(UIViewController *)rootViewController {
const CGSize displaySize = self.streamManager.videoScaleManager.displayViewportResolution;
if (displaySize.width < 1) {
// The dimensions of the display screen is unknown because the connected head unit did not provide a screen resolution in the `RegisterAppInterfaceResponse` or in the video start service ACK.
SDLLogW(@"The display screen dimensions are unknown. The CarWindow will not resize.");
return;
}
const CGRect appFrame = self.streamManager.videoScaleManager.appViewportFrame;
rootViewController.view.frame = appFrame;
rootViewController.view.bounds = appFrame;
SDLLogD(@"Setting CarWindow frame to: %@ (display size: %@)", NSStringFromCGSize(appFrame.size), NSStringFromCGSize(displaySize));
}
@end
NS_ASSUME_NONNULL_END
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