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![Rémi Verschelde](/assets/img/avatar_default.png)
As many open source projects have started doing it, we're removing the current year from the copyright notice, so that we don't need to bump it every year. It seems like only the first year of publication is technically relevant for copyright notices, and even that seems to be something that many companies stopped listing altogether (in a version controlled codebase, the commits are a much better source of date of publication than a hardcoded copyright statement). We also now list Godot Engine contributors first as we're collectively the current maintainers of the project, and we clarify that the "exclusive" copyright of the co-founders covers the timespan before opensourcing (their further contributions are included as part of Godot Engine contributors). Also fixed "cf." Frenchism - it's meant as "refer to / see".
356 lines
12 KiB
Plaintext
356 lines
12 KiB
Plaintext
/**************************************************************************/
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/* camera_macos.mm */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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///@TODO this is a near duplicate of CameraIOS, we should find a way to combine those to minimize code duplication!!!!
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// If you fix something here, make sure you fix it there as well!
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#include "camera_macos.h"
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#include "servers/camera/camera_feed.h"
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#import <AVFoundation/AVFoundation.h>
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//////////////////////////////////////////////////////////////////////////
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// MyCaptureSession - This is a little helper class so we can capture our frames
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@interface MyCaptureSession : AVCaptureSession <AVCaptureVideoDataOutputSampleBufferDelegate> {
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Ref<CameraFeed> feed;
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size_t width[2];
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size_t height[2];
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Vector<uint8_t> img_data[2];
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AVCaptureDeviceInput *input;
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AVCaptureVideoDataOutput *output;
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}
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@end
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@implementation MyCaptureSession
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- (id)initForFeed:(Ref<CameraFeed>)p_feed andDevice:(AVCaptureDevice *)p_device {
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if (self = [super init]) {
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NSError *error;
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feed = p_feed;
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width[0] = 0;
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height[0] = 0;
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width[1] = 0;
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height[1] = 0;
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[self beginConfiguration];
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input = [AVCaptureDeviceInput deviceInputWithDevice:p_device error:&error];
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if (!input) {
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print_line("Couldn't get input device for camera");
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} else {
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[self addInput:input];
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}
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output = [AVCaptureVideoDataOutput new];
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if (!output) {
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print_line("Couldn't get output device for camera");
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} else {
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NSDictionary *settings = @{ (NSString *)kCVPixelBufferPixelFormatTypeKey : @(kCVPixelFormatType_420YpCbCr8BiPlanarFullRange) };
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output.videoSettings = settings;
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// discard if the data output queue is blocked (as we process the still image)
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[output setAlwaysDiscardsLateVideoFrames:YES];
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// now set ourselves as the delegate to receive new frames.
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[output setSampleBufferDelegate:self queue:dispatch_get_main_queue()];
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// this takes ownership
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[self addOutput:output];
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}
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[self commitConfiguration];
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// kick off our session..
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[self startRunning];
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};
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return self;
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}
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- (void)cleanup {
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// stop running
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[self stopRunning];
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// cleanup
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[self beginConfiguration];
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// remove input
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if (input) {
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[self removeInput:input];
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// don't release this
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input = nullptr;
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}
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// free up our output
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if (output) {
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[self removeOutput:output];
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[output setSampleBufferDelegate:nil queue:nullptr];
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output = nullptr;
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}
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[self commitConfiguration];
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}
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- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection {
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// This gets called every time our camera has a new image for us to process.
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// May need to investigate in a way to throttle this if we get more images then we're rendering frames..
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// For now, version 1, we're just doing the bare minimum to make this work...
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CVImageBufferRef pixelBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
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// int _width = CVPixelBufferGetWidth(pixelBuffer);
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// int _height = CVPixelBufferGetHeight(pixelBuffer);
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// It says that we need to lock this on the documentation pages but it's not in the samples
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// need to lock our base address so we can access our pixel buffers, better safe then sorry?
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CVPixelBufferLockBaseAddress(pixelBuffer, kCVPixelBufferLock_ReadOnly);
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// get our buffers
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unsigned char *dataY = (unsigned char *)CVPixelBufferGetBaseAddressOfPlane(pixelBuffer, 0);
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unsigned char *dataCbCr = (unsigned char *)CVPixelBufferGetBaseAddressOfPlane(pixelBuffer, 1);
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if (dataY == nullptr) {
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print_line("Couldn't access Y pixel buffer data");
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} else if (dataCbCr == nullptr) {
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print_line("Couldn't access CbCr pixel buffer data");
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} else {
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Ref<Image> img[2];
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{
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// do Y
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size_t new_width = CVPixelBufferGetWidthOfPlane(pixelBuffer, 0);
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size_t new_height = CVPixelBufferGetHeightOfPlane(pixelBuffer, 0);
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if ((width[0] != new_width) || (height[0] != new_height)) {
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width[0] = new_width;
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height[0] = new_height;
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img_data[0].resize(new_width * new_height);
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}
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uint8_t *w = img_data[0].ptrw();
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memcpy(w, dataY, new_width * new_height);
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img[0].instantiate();
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img[0]->set_data(new_width, new_height, 0, Image::FORMAT_R8, img_data[0]);
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}
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{
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// do CbCr
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size_t new_width = CVPixelBufferGetWidthOfPlane(pixelBuffer, 1);
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size_t new_height = CVPixelBufferGetHeightOfPlane(pixelBuffer, 1);
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if ((width[1] != new_width) || (height[1] != new_height)) {
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width[1] = new_width;
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height[1] = new_height;
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img_data[1].resize(2 * new_width * new_height);
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}
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uint8_t *w = img_data[1].ptrw();
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memcpy(w, dataCbCr, 2 * new_width * new_height);
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///TODO OpenGL doesn't support FORMAT_RG8, need to do some form of conversion
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img[1].instantiate();
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img[1]->set_data(new_width, new_height, 0, Image::FORMAT_RG8, img_data[1]);
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}
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// set our texture...
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feed->set_YCbCr_imgs(img[0], img[1]);
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}
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// and unlock
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CVPixelBufferUnlockBaseAddress(pixelBuffer, kCVPixelBufferLock_ReadOnly);
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}
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@end
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//////////////////////////////////////////////////////////////////////////
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// CameraFeedMacOS - Subclass for camera feeds in macOS
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class CameraFeedMacOS : public CameraFeed {
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private:
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AVCaptureDevice *device;
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MyCaptureSession *capture_session;
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public:
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AVCaptureDevice *get_device() const;
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CameraFeedMacOS();
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void set_device(AVCaptureDevice *p_device);
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bool activate_feed();
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void deactivate_feed();
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};
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AVCaptureDevice *CameraFeedMacOS::get_device() const {
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return device;
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};
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CameraFeedMacOS::CameraFeedMacOS() {
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device = nullptr;
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capture_session = nullptr;
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};
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void CameraFeedMacOS::set_device(AVCaptureDevice *p_device) {
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device = p_device;
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// get some info
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NSString *device_name = p_device.localizedName;
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name = String::utf8(device_name.UTF8String);
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position = CameraFeed::FEED_UNSPECIFIED;
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if ([p_device position] == AVCaptureDevicePositionBack) {
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position = CameraFeed::FEED_BACK;
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} else if ([p_device position] == AVCaptureDevicePositionFront) {
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position = CameraFeed::FEED_FRONT;
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};
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};
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bool CameraFeedMacOS::activate_feed() {
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if (capture_session) {
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// Already recording!
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} else {
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// Start camera capture, check permission.
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if (@available(macOS 10.14, *)) {
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AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
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if (status == AVAuthorizationStatusAuthorized) {
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capture_session = [[MyCaptureSession alloc] initForFeed:this andDevice:device];
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} else if (status == AVAuthorizationStatusNotDetermined) {
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// Request permission.
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[AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo
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completionHandler:^(BOOL granted) {
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if (granted) {
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capture_session = [[MyCaptureSession alloc] initForFeed:this andDevice:device];
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}
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}];
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}
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} else {
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capture_session = [[MyCaptureSession alloc] initForFeed:this andDevice:device];
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}
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};
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return true;
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};
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void CameraFeedMacOS::deactivate_feed() {
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// end camera capture if we have one
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if (capture_session) {
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[capture_session cleanup];
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capture_session = nullptr;
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};
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};
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//////////////////////////////////////////////////////////////////////////
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// MyDeviceNotifications - This is a little helper class gets notifications
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// when devices are connected/disconnected
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@interface MyDeviceNotifications : NSObject {
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CameraMacOS *camera_server;
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}
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@end
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@implementation MyDeviceNotifications
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- (void)devices_changed:(NSNotification *)notification {
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camera_server->update_feeds();
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}
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- (id)initForServer:(CameraMacOS *)p_server {
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if (self = [super init]) {
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camera_server = p_server;
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[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(devices_changed:) name:AVCaptureDeviceWasConnectedNotification object:nil];
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[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(devices_changed:) name:AVCaptureDeviceWasDisconnectedNotification object:nil];
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};
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return self;
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}
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- (void)dealloc {
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// remove notifications
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[[NSNotificationCenter defaultCenter] removeObserver:self name:AVCaptureDeviceWasConnectedNotification object:nil];
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[[NSNotificationCenter defaultCenter] removeObserver:self name:AVCaptureDeviceWasDisconnectedNotification object:nil];
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}
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@end
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MyDeviceNotifications *device_notifications = nil;
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//////////////////////////////////////////////////////////////////////////
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// CameraMacOS - Subclass for our camera server on macOS
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void CameraMacOS::update_feeds() {
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#if MAC_OS_X_VERSION_MIN_REQUIRED >= 101500
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AVCaptureDeviceDiscoverySession *session = [AVCaptureDeviceDiscoverySession discoverySessionWithDeviceTypes:[NSArray arrayWithObjects:AVCaptureDeviceTypeExternalUnknown, AVCaptureDeviceTypeBuiltInWideAngleCamera, nil] mediaType:AVMediaTypeVideo position:AVCaptureDevicePositionUnspecified];
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NSArray *devices = session.devices;
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#else
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NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
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#endif
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// remove devices that are gone..
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for (int i = feeds.size() - 1; i >= 0; i--) {
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Ref<CameraFeedMacOS> feed = (Ref<CameraFeedMacOS>)feeds[i];
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if (![devices containsObject:feed->get_device()]) {
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// remove it from our array, this will also destroy it ;)
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remove_feed(feed);
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};
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};
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for (AVCaptureDevice *device in devices) {
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bool found = false;
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for (int i = 0; i < feeds.size() && !found; i++) {
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Ref<CameraFeedMacOS> feed = (Ref<CameraFeedMacOS>)feeds[i];
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if (feed->get_device() == device) {
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found = true;
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};
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};
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if (!found) {
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Ref<CameraFeedMacOS> newfeed;
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newfeed.instantiate();
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newfeed->set_device(device);
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// assume display camera so inverse
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Transform2D transform = Transform2D(-1.0, 0.0, 0.0, -1.0, 1.0, 1.0);
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newfeed->set_transform(transform);
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add_feed(newfeed);
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};
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};
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};
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CameraMacOS::CameraMacOS() {
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// Find available cameras we have at this time
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update_feeds();
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// should only have one of these....
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device_notifications = [[MyDeviceNotifications alloc] initForServer:this];
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};
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