437 lines
14 KiB
Plaintext
437 lines
14 KiB
Plaintext
/*************************************************************************/
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/* camera_ios.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) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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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 CameraOSX, 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 wel!
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#include "camera_ios.h"
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#include "servers/camera/camera_feed.h"
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#import <AVFoundation/AVFoundation.h>
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#import <UIKit/UIKit.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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PoolVector<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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// prepare our device
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[p_device lockForConfiguration:&error];
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[p_device setFocusMode:AVCaptureFocusModeLocked];
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[p_device setExposureMode:AVCaptureExposureModeLocked];
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[p_device setWhiteBalanceMode:AVCaptureWhiteBalanceModeLocked];
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[p_device unlockForConfiguration];
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[self beginConfiguration];
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// setup our capture
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self.sessionPreset = AVCaptureSessionPreset1280x720;
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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. Note that we're doing this on the main thread at the moment, we may need to change this..
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[output setSampleBufferDelegate:self queue:dispatch_get_main_queue()];
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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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if (input) {
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[self removeInput:input];
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// don't release this
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input = nil;
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}
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if (output) {
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[self removeOutput:output];
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[output setSampleBufferDelegate:nil queue:NULL];
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[output release];
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output = nil;
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}
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[self commitConfiguration];
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}
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- (void)dealloc {
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// bye bye
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[super dealloc];
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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 == NULL) {
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print_line("Couldn't access Y pixel buffer data");
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} else if (dataCbCr == NULL) {
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print_line("Couldn't access CbCr pixel buffer data");
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} else {
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UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
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Ref<Image> img[2];
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{
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// do Y
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int new_width = CVPixelBufferGetWidthOfPlane(pixelBuffer, 0);
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int new_height = CVPixelBufferGetHeightOfPlane(pixelBuffer, 0);
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int _bytes_per_row = CVPixelBufferGetBytesPerRowOfPlane(pixelBuffer, 0);
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if ((width[0] != new_width) || (height[0] != new_height)) {
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// printf("Camera Y plane %i, %i - %i\n", new_width, new_height, bytes_per_row);
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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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PoolVector<uint8_t>::Write w = img_data[0].write();
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memcpy(w.ptr(), dataY, new_width * new_height);
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img[0].instance();
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img[0]->create(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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int new_width = CVPixelBufferGetWidthOfPlane(pixelBuffer, 1);
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int new_height = CVPixelBufferGetHeightOfPlane(pixelBuffer, 1);
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int bytes_per_row = CVPixelBufferGetBytesPerRowOfPlane(pixelBuffer, 1);
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if ((width[1] != new_width) || (height[1] != new_height)) {
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// printf("Camera CbCr plane %i, %i - %i\n", new_width, new_height, bytes_per_row);
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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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PoolVector<uint8_t>::Write w = img_data[1].write();
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memcpy(w.ptr(), dataCbCr, 2 * new_width * new_height);
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///TODO GLES2 doesn't support FORMAT_RG8, need to do some form of conversion
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img[1].instance();
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img[1]->create(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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// update our matrix to match the orientation, note, before changing anything
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// here, be aware that the project orientation settings must match your xcode
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// settings or this will go wrong!
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Transform2D display_transform;
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switch (orientation) {
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case UIInterfaceOrientationPortrait: {
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display_transform = Transform2D(0.0, -1.0, -1.0, 0.0, 1.0, 1.0);
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} break;
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case UIInterfaceOrientationLandscapeRight: {
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display_transform = Transform2D(1.0, 0.0, 0.0, -1.0, 0.0, 1.0);
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} break;
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case UIInterfaceOrientationLandscapeLeft: {
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display_transform = Transform2D(-1.0, 0.0, 0.0, 1.0, 1.0, 0.0);
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} break;
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default: {
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display_transform = Transform2D(0.0, 1.0, 1.0, 0.0, 0.0, 0.0);
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} break;
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}
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//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!
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feed->set_transform(display_transform);
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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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// CameraFeedIOS - Subclass for camera feeds in iOS
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class CameraFeedIOS : 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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bool get_is_arkit() const;
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AVCaptureDevice *get_device() const;
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CameraFeedIOS();
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~CameraFeedIOS();
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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 *CameraFeedIOS::get_device() const {
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return device;
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};
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CameraFeedIOS::CameraFeedIOS() {
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capture_session = NULL;
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device = NULL;
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transform = Transform2D(1.0, 0.0, 0.0, 1.0, 0.0, 0.0); /* should re-orientate this based on device orientation */
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};
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void CameraFeedIOS::set_device(AVCaptureDevice *p_device) {
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device = p_device;
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[device retain];
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// get some info
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NSString *device_name = p_device.localizedName;
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name = 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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CameraFeedIOS::~CameraFeedIOS() {
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if (capture_session != NULL) {
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[capture_session release];
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capture_session = NULL;
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};
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if (device != NULL) {
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[device release];
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device = NULL;
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};
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};
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bool CameraFeedIOS::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
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capture_session = [[MyCaptureSession alloc] initForFeed:this andDevice:device];
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};
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return true;
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};
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void CameraFeedIOS::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 release];
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capture_session = NULL;
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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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CameraIOS *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:(CameraIOS *)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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[super dealloc];
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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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// CameraIOS - Subclass for our camera server on iPhone
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void CameraIOS::update_feeds() {
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// this way of doing things is deprecated but still works,
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// rewrite to using AVCaptureDeviceDiscoverySession
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AVCaptureDeviceDiscoverySession *session = [AVCaptureDeviceDiscoverySession discoverySessionWithDeviceTypes:[NSArray arrayWithObjects:AVCaptureDeviceTypeBuiltInTelephotoCamera, AVCaptureDeviceTypeBuiltInDualCamera, AVCaptureDeviceTypeBuiltInTrueDepthCamera, AVCaptureDeviceTypeBuiltInWideAngleCamera, nil] mediaType:AVMediaTypeVideo position:AVCaptureDevicePositionUnspecified];
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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<CameraFeedIOS> feed(feeds[i]);
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if (feed.is_null()) {
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// feed not managed by us
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} else if (![session.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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// add new devices..
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for (AVCaptureDevice *device in session.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<CameraFeedIOS> feed(feeds[i]);
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if (feed.is_null()) {
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// feed not managed by us
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} else 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<CameraFeedIOS> newfeed;
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newfeed.instance();
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newfeed->set_device(device);
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add_feed(newfeed);
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};
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};
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};
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CameraIOS::CameraIOS() {
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// check if we have our usage description
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NSString *usage_desc = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"NSCameraUsageDescription"];
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if (usage_desc == NULL) {
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// don't initialise if we don't get anything
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print_line("No NSCameraUsageDescription key in pList, no access to cameras.");
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return;
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} else if (usage_desc.length == 0) {
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// don't initialise if we don't get anything
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print_line("Empty NSCameraUsageDescription key in pList, no access to cameras.");
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return;
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}
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// now we'll request access.
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// If this is the first time the user will be prompted with the string (iOS will read it).
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// Once a decision is made it is returned. If the user wants to change it later on they
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// need to go into setting.
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print_line("Requesting Camera permissions");
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[AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo
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completionHandler:^(BOOL granted) {
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if (granted) {
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print_line("Access to cameras granted!");
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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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} else {
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print_line("No access to cameras!");
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}
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}];
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};
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CameraIOS::~CameraIOS() {
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[device_notifications release];
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};
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