/**************************************************************************/
/* camera_macos.mm */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
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/* The above copyright notice and this permission notice shall be */
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/**************************************************************************/
///@TODO this is a near duplicate of CameraIOS, we should find a way to combine those to minimize code duplication!!!!
// If you fix something here, make sure you fix it there as well!
#include "camera_macos.h"
#include "servers/camera/camera_feed.h"
#import <AVFoundation/AVFoundation.h>
//////////////////////////////////////////////////////////////////////////
// MyCaptureSession - This is a little helper class so we can capture our frames
@interface MyCaptureSession : AVCaptureSession <AVCaptureVideoDataOutputSampleBufferDelegate> {
Ref<CameraFeed> feed;
size_t width[2];
size_t height[2];
Vector<uint8_t> img_data[2];
AVCaptureDeviceInput *input;
AVCaptureVideoDataOutput *output;
}
@end
@implementation MyCaptureSession
- (id)initForFeed:(Ref<CameraFeed>)p_feed andDevice:(AVCaptureDevice *)p_device {
if (self = [super init]) {
NSError *error;
feed = p_feed;
width[0] = 0;
height[0] = 0;
width[1] = 0;
height[1] = 0;
[self beginConfiguration];
input = [AVCaptureDeviceInput deviceInputWithDevice:p_device error:&error];
if (!input) {
print_line("Couldn't get input device for camera");
} else {
[self addInput:input];
}
output = [AVCaptureVideoDataOutput new];
if (!output) {
print_line("Couldn't get output device for camera");
} else {
NSDictionary *settings = @{ (NSString *)kCVPixelBufferPixelFormatTypeKey : @(kCVPixelFormatType_420YpCbCr8BiPlanarFullRange) };
output.videoSettings = settings;
// discard if the data output queue is blocked (as we process the still image)
[output setAlwaysDiscardsLateVideoFrames:YES];
// now set ourselves as the delegate to receive new frames.
[output setSampleBufferDelegate:self queue:dispatch_get_main_queue()];
// this takes ownership
[self addOutput:output];
}
[self commitConfiguration];
// kick off our session..
[self startRunning];
};
return self;
}
- (void)cleanup {
// stop running
[self stopRunning];
// cleanup
[self beginConfiguration];
// remove input
if (input) {
[self removeInput:input];
// don't release this
input = nullptr;
}
// free up our output
if (output) {
[self removeOutput:output];
[output setSampleBufferDelegate:nil queue:nullptr];
output = nullptr;
}
[self commitConfiguration];
}
- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection {
// This gets called every time our camera has a new image for us to process.
// May need to investigate in a way to throttle this if we get more images then we're rendering frames..
// For now, version 1, we're just doing the bare minimum to make this work...
CVImageBufferRef pixelBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
// int _width = CVPixelBufferGetWidth(pixelBuffer);
// int _height = CVPixelBufferGetHeight(pixelBuffer);
// It says that we need to lock this on the documentation pages but it's not in the samples
// need to lock our base address so we can access our pixel buffers, better safe then sorry?
CVPixelBufferLockBaseAddress(pixelBuffer, kCVPixelBufferLock_ReadOnly);
// get our buffers
unsigned char *dataY = (unsigned char *)CVPixelBufferGetBaseAddressOfPlane(pixelBuffer, 0);
unsigned char *dataCbCr = (unsigned char *)CVPixelBufferGetBaseAddressOfPlane(pixelBuffer, 1);
if (dataY == nullptr) {
print_line("Couldn't access Y pixel buffer data");
} else if (dataCbCr == nullptr) {
print_line("Couldn't access CbCr pixel buffer data");
} else {
Ref<Image> img[2];
{
// do Y
size_t new_width = CVPixelBufferGetWidthOfPlane(pixelBuffer, 0);
size_t new_height = CVPixelBufferGetHeightOfPlane(pixelBuffer, 0);
if ((width[0] != new_width) || (height[0] != new_height)) {
width[0] = new_width;
height[0] = new_height;
img_data[0].resize(new_width * new_height);
}
uint8_t *w = img_data[0].ptrw();
memcpy(w, dataY, new_width * new_height);
img[0].instantiate();
img[0]->set_data(new_width, new_height, 0, Image::FORMAT_R8, img_data[0]);
}
{
// do CbCr
size_t new_width = CVPixelBufferGetWidthOfPlane(pixelBuffer, 1);
size_t new_height = CVPixelBufferGetHeightOfPlane(pixelBuffer, 1);
if ((width[1] != new_width) || (height[1] != new_height)) {
width[1] = new_width;
height[1] = new_height;
img_data[1].resize(2 * new_width * new_height);
}
uint8_t *w = img_data[1].ptrw();
memcpy(w, dataCbCr, 2 * new_width * new_height);
///TODO OpenGL doesn't support FORMAT_RG8, need to do some form of conversion
img[1].instantiate();
img[1]->set_data(new_width, new_height, 0, Image::FORMAT_RG8, img_data[1]);
}
// set our texture...
feed->set_ycbcr_images(img[0], img[1]);
}
// and unlock
CVPixelBufferUnlockBaseAddress(pixelBuffer, kCVPixelBufferLock_ReadOnly);
}
@end
//////////////////////////////////////////////////////////////////////////
// CameraFeedMacOS - Subclass for camera feeds in macOS
class CameraFeedMacOS : public CameraFeed {
private:
AVCaptureDevice *device;
MyCaptureSession *capture_session;
public:
AVCaptureDevice *get_device() const;
CameraFeedMacOS();
void set_device(AVCaptureDevice *p_device);
bool activate_feed();
void deactivate_feed();
};
AVCaptureDevice *CameraFeedMacOS::get_device() const {
return device;
}
CameraFeedMacOS::CameraFeedMacOS() {
device = nullptr;
capture_session = nullptr;
}
void CameraFeedMacOS::set_device(AVCaptureDevice *p_device) {
device = p_device;
// get some info
NSString *device_name = p_device.localizedName;
name = String::utf8(device_name.UTF8String);
position = CameraFeed::FEED_UNSPECIFIED;
if ([p_device position] == AVCaptureDevicePositionBack) {
position = CameraFeed::FEED_BACK;
} else if ([p_device position] == AVCaptureDevicePositionFront) {
position = CameraFeed::FEED_FRONT;
};
}
bool CameraFeedMacOS::activate_feed() {
if (capture_session) {
// Already recording!
} else {
// Start camera capture, check permission.
if (@available(macOS 10.14, *)) {
AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
if (status == AVAuthorizationStatusAuthorized) {
capture_session = [[MyCaptureSession alloc] initForFeed:this andDevice:device];
} else if (status == AVAuthorizationStatusNotDetermined) {
// Request permission.
[AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo
completionHandler:^(BOOL granted) {
if (granted) {
capture_session = [[MyCaptureSession alloc] initForFeed:this andDevice:device];
}
}];
}
} else {
capture_session = [[MyCaptureSession alloc] initForFeed:this andDevice:device];
}
};
return true;
}
void CameraFeedMacOS::deactivate_feed() {
// end camera capture if we have one
if (capture_session) {
[capture_session cleanup];
capture_session = nullptr;
};
}
//////////////////////////////////////////////////////////////////////////
// MyDeviceNotifications - This is a little helper class gets notifications
// when devices are connected/disconnected
@interface MyDeviceNotifications : NSObject {
CameraMacOS *camera_server;
}
@end
@implementation MyDeviceNotifications
- (void)devices_changed:(NSNotification *)notification {
camera_server->update_feeds();
}
- (id)initForServer:(CameraMacOS *)p_server {
if (self = [super init]) {
camera_server = p_server;
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(devices_changed:) name:AVCaptureDeviceWasConnectedNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(devices_changed:) name:AVCaptureDeviceWasDisconnectedNotification object:nil];
};
return self;
}
- (void)dealloc {
// remove notifications
[[NSNotificationCenter defaultCenter] removeObserver:self name:AVCaptureDeviceWasConnectedNotification object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self name:AVCaptureDeviceWasDisconnectedNotification object:nil];
}
@end
MyDeviceNotifications *device_notifications = nil;
//////////////////////////////////////////////////////////////////////////
// CameraMacOS - Subclass for our camera server on macOS
void CameraMacOS::update_feeds() {
#if __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500
AVCaptureDeviceDiscoverySession *session;
#if __MAC_OS_X_VERSION_MIN_REQUIRED >= 140000
// Avoid deprecated warning if the minimum SDK is 14.0.
session = [AVCaptureDeviceDiscoverySession discoverySessionWithDeviceTypes:[NSArray arrayWithObjects:AVCaptureDeviceTypeExternal, AVCaptureDeviceTypeBuiltInWideAngleCamera, nil] mediaType:AVMediaTypeVideo position:AVCaptureDevicePositionUnspecified];
#else
session = [AVCaptureDeviceDiscoverySession discoverySessionWithDeviceTypes:[NSArray arrayWithObjects:AVCaptureDeviceTypeExternalUnknown, AVCaptureDeviceTypeBuiltInWideAngleCamera, nil] mediaType:AVMediaTypeVideo position:AVCaptureDevicePositionUnspecified];
#endif
NSArray<AVCaptureDevice *> *devices = session.devices;
#else
NSArray<AVCaptureDevice *> *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
#endif
// remove devices that are gone..
for (int i = feeds.size() - 1; i >= 0; i--) {
Ref<CameraFeedMacOS> feed = (Ref<CameraFeedMacOS>)feeds[i];
if (![devices containsObject:feed->get_device()]) {
// remove it from our array, this will also destroy it ;)
remove_feed(feed);
};
};
for (AVCaptureDevice *device in devices) {
bool found = false;
for (int i = 0; i < feeds.size() && !found; i++) {
Ref<CameraFeedMacOS> feed = (Ref<CameraFeedMacOS>)feeds[i];
if (feed->get_device() == device) {
found = true;
};
};
if (!found) {
Ref<CameraFeedMacOS> newfeed;
newfeed.instantiate();
newfeed->set_device(device);
// assume display camera so inverse
Transform2D transform = Transform2D(-1.0, 0.0, 0.0, -1.0, 1.0, 1.0);
newfeed->set_transform(transform);
add_feed(newfeed);
};
};
}
CameraMacOS::CameraMacOS() {
// Find available cameras we have at this time
update_feeds();
// should only have one of these....
device_notifications = [[MyDeviceNotifications alloc] initForServer:this];
}
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