godot/platform/iphone/camera_ios.mm
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2019-11-22 08:35:03 +01:00

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/*************************************************************************/
/* camera_ios.mm */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
///@TODO this is a near duplicate of CameraOSX, we should find a way to combine those to minimize code duplication!!!!
// If you fix something here, make sure you fix it there as wel!
#include "camera_ios.h"
#include "servers/camera/camera_feed.h"
#import <AVFoundation/AVFoundation.h>
#import <UIKit/UIKit.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];
PoolVector<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;
// prepare our device
[p_device lockForConfiguration:&error];
[p_device setFocusMode:AVCaptureFocusModeLocked];
[p_device setExposureMode:AVCaptureExposureModeLocked];
[p_device setWhiteBalanceMode:AVCaptureWhiteBalanceModeLocked];
[p_device unlockForConfiguration];
[self beginConfiguration];
// setup our capture
self.sessionPreset = AVCaptureSessionPreset1280x720;
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. Note that we're doing this on the main thread at the moment, we may need to change this..
[output setSampleBufferDelegate:self queue:dispatch_get_main_queue()];
[self addOutput:output];
}
[self commitConfiguration];
// kick off our session..
[self startRunning];
};
return self;
}
- (void)cleanup {
// stop running
[self stopRunning];
// cleanup
[self beginConfiguration];
if (input) {
[self removeInput:input];
// don't release this
input = nil;
}
if (output) {
[self removeOutput:output];
[output setSampleBufferDelegate:nil queue:NULL];
[output release];
output = nil;
}
[self commitConfiguration];
}
- (void)dealloc {
// bye bye
[super dealloc];
}
- (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 == NULL) {
print_line("Couldn't access Y pixel buffer data");
} else if (dataCbCr == NULL) {
print_line("Couldn't access CbCr pixel buffer data");
} else {
UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
Ref<Image> img[2];
{
// do Y
int new_width = CVPixelBufferGetWidthOfPlane(pixelBuffer, 0);
int new_height = CVPixelBufferGetHeightOfPlane(pixelBuffer, 0);
int _bytes_per_row = CVPixelBufferGetBytesPerRowOfPlane(pixelBuffer, 0);
if ((width[0] != new_width) || (height[0] != new_height)) {
// printf("Camera Y plane %i, %i - %i\n", new_width, new_height, bytes_per_row);
width[0] = new_width;
height[0] = new_height;
img_data[0].resize(new_width * new_height);
}
PoolVector<uint8_t>::Write w = img_data[0].write();
memcpy(w.ptr(), dataY, new_width * new_height);
img[0].instance();
img[0]->create(new_width, new_height, 0, Image::FORMAT_R8, img_data[0]);
}
{
// do CbCr
int new_width = CVPixelBufferGetWidthOfPlane(pixelBuffer, 1);
int new_height = CVPixelBufferGetHeightOfPlane(pixelBuffer, 1);
int bytes_per_row = CVPixelBufferGetBytesPerRowOfPlane(pixelBuffer, 1);
if ((width[1] != new_width) || (height[1] != new_height)) {
// printf("Camera CbCr plane %i, %i - %i\n", new_width, new_height, bytes_per_row);
width[1] = new_width;
height[1] = new_height;
img_data[1].resize(2 * new_width * new_height);
}
PoolVector<uint8_t>::Write w = img_data[1].write();
memcpy(w.ptr(), dataCbCr, 2 * new_width * new_height);
///TODO GLES2 doesn't support FORMAT_RG8, need to do some form of conversion
img[1].instance();
img[1]->create(new_width, new_height, 0, Image::FORMAT_RG8, img_data[1]);
}
// set our texture...
feed->set_YCbCr_imgs(img[0], img[1]);
// update our matrix to match the orientation, note, before changing anything
// here, be aware that the project orientation settings must match your xcode
// settings or this will go wrong!
Transform2D display_transform;
switch (orientation) {
case UIInterfaceOrientationPortrait: {
display_transform = Transform2D(0.0, -1.0, -1.0, 0.0, 1.0, 1.0);
} break;
case UIInterfaceOrientationLandscapeRight: {
display_transform = Transform2D(1.0, 0.0, 0.0, -1.0, 0.0, 1.0);
} break;
case UIInterfaceOrientationLandscapeLeft: {
display_transform = Transform2D(-1.0, 0.0, 0.0, 1.0, 1.0, 0.0);
} break;
default: {
display_transform = Transform2D(0.0, 1.0, 1.0, 0.0, 0.0, 0.0);
} break;
}
//TODO: this is correct for the camera on the back, I have a feeling this needs to be inversed for the camera on the front!
feed->set_transform(display_transform);
}
// and unlock
CVPixelBufferUnlockBaseAddress(pixelBuffer, kCVPixelBufferLock_ReadOnly);
}
@end
//////////////////////////////////////////////////////////////////////////
// CameraFeedIOS - Subclass for camera feeds in iOS
class CameraFeedIOS : public CameraFeed {
private:
AVCaptureDevice *device;
MyCaptureSession *capture_session;
public:
bool get_is_arkit() const;
AVCaptureDevice *get_device() const;
CameraFeedIOS();
~CameraFeedIOS();
void set_device(AVCaptureDevice *p_device);
bool activate_feed();
void deactivate_feed();
};
AVCaptureDevice *CameraFeedIOS::get_device() const {
return device;
};
CameraFeedIOS::CameraFeedIOS() {
capture_session = NULL;
device = NULL;
transform = Transform2D(1.0, 0.0, 0.0, 1.0, 0.0, 0.0); /* should re-orientate this based on device orientation */
};
void CameraFeedIOS::set_device(AVCaptureDevice *p_device) {
device = p_device;
[device retain];
// get some info
NSString *device_name = p_device.localizedName;
name = 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;
};
};
CameraFeedIOS::~CameraFeedIOS() {
if (capture_session != NULL) {
[capture_session release];
capture_session = NULL;
};
if (device != NULL) {
[device release];
device = NULL;
};
};
bool CameraFeedIOS::activate_feed() {
if (capture_session) {
// already recording!
} else {
// start camera capture
capture_session = [[MyCaptureSession alloc] initForFeed:this andDevice:device];
};
return true;
};
void CameraFeedIOS::deactivate_feed() {
// end camera capture if we have one
if (capture_session) {
[capture_session cleanup];
[capture_session release];
capture_session = NULL;
};
};
//////////////////////////////////////////////////////////////////////////
// MyDeviceNotifications - This is a little helper class gets notifications
// when devices are connected/disconnected
@interface MyDeviceNotifications : NSObject {
CameraIOS *camera_server;
}
@end
@implementation MyDeviceNotifications
- (void)devices_changed:(NSNotification *)notification {
camera_server->update_feeds();
}
- (id)initForServer:(CameraIOS *)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];
[super dealloc];
}
@end
MyDeviceNotifications *device_notifications = nil;
//////////////////////////////////////////////////////////////////////////
// CameraIOS - Subclass for our camera server on iPhone
void CameraIOS::update_feeds() {
// this way of doing things is deprecated but still works,
// rewrite to using AVCaptureDeviceDiscoverySession
AVCaptureDeviceDiscoverySession *session = [AVCaptureDeviceDiscoverySession discoverySessionWithDeviceTypes:[NSArray arrayWithObjects:AVCaptureDeviceTypeBuiltInTelephotoCamera, AVCaptureDeviceTypeBuiltInDualCamera, AVCaptureDeviceTypeBuiltInTrueDepthCamera, AVCaptureDeviceTypeBuiltInWideAngleCamera] mediaType:AVMediaTypeVideo position:AVCaptureDevicePositionUnspecified];
// remove devices that are gone..
for (int i = feeds.size() - 1; i >= 0; i--) {
Ref<CameraFeedIOS> feed(feeds[i]);
if (feed.is_null()) {
// feed not managed by us
} else if (![session.devices containsObject:feed->get_device()]) {
// remove it from our array, this will also destroy it ;)
remove_feed(feed);
};
};
// add new devices..
for (AVCaptureDevice *device in session.devices) {
bool found = false;
for (int i = 0; i < feeds.size() && !found; i++) {
Ref<CameraFeedIOS> feed(feeds[i]);
if (feed.is_null()) {
// feed not managed by us
} else if (feed->get_device() == device) {
found = true;
};
};
if (!found) {
Ref<CameraFeedIOS> newfeed;
newfeed.instance();
newfeed->set_device(device);
add_feed(newfeed);
};
};
};
CameraIOS::CameraIOS() {
// check if we have our usage description
NSString *usage_desc = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"NSCameraUsageDescription"];
if (usage_desc == NULL) {
// don't initialise if we don't get anything
print_line("No NSCameraUsageDescription key in pList, no access to cameras.");
return;
} else if (usage_desc.length == 0) {
// don't initialise if we don't get anything
print_line("Empty NSCameraUsageDescription key in pList, no access to cameras.");
return;
}
// now we'll request access.
// If this is the first time the user will be prompted with the string (iOS will read it).
// Once a decision is made it is returned. If the user wants to change it later on they
// need to go into setting.
print_line("Requesting Camera permissions");
[AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo
completionHandler:^(BOOL granted) {
if (granted) {
print_line("Access to cameras granted!");
// Find available cameras we have at this time
update_feeds();
// should only have one of these....
device_notifications = [[MyDeviceNotifications alloc] initForServer:this];
} else {
print_line("No access to cameras!");
}
}];
};
CameraIOS::~CameraIOS() {
[device_notifications release];
};