392 lines
14 KiB
C
392 lines
14 KiB
C
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/*
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==============================================================================
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This file is part of the JUCE examples.
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Copyright (c) 2020 - Raw Material Software Limited
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The code included in this file is provided under the terms of the ISC license
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http://www.isc.org/downloads/software-support-policy/isc-license. Permission
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To use, copy, modify, and/or distribute this software for any purpose with or
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without fee is hereby granted provided that the above copyright notice and
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this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES,
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WHETHER EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR
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PURPOSE, ARE DISCLAIMED.
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==============================================================================
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*/
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/*******************************************************************************
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The block below describes the properties of this PIP. A PIP is a short snippet
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of code that can be read by the Projucer and used to generate a JUCE project.
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BEGIN_JUCE_PIP_METADATA
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name: CameraDemo
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version: 1.0.0
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vendor: JUCE
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website: http://juce.com
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description: Showcases camera features.
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dependencies: juce_audio_basics, juce_audio_devices, juce_core, juce_cryptography,
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juce_data_structures, juce_events, juce_graphics, juce_gui_basics,
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juce_gui_extra, juce_video
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exporters: xcode_mac, vs2019, androidstudio, xcode_iphone
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moduleFlags: JUCE_USE_CAMERA=1, JUCE_STRICT_REFCOUNTEDPOINTER=1
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type: Component
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mainClass: CameraDemo
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useLocalCopy: 1
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END_JUCE_PIP_METADATA
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*******************************************************************************/
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#pragma once
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#include "../Assets/DemoUtilities.h"
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//==============================================================================
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class CameraDemo : public Component
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{
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public:
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CameraDemo()
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{
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setOpaque (true);
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#if JUCE_ANDROID
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// Android requires exclusive access to the audio device when recording videos.
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audioDeviceManager.closeAudioDevice();
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#endif
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addAndMakeVisible (cameraSelectorComboBox);
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updateCameraList();
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cameraSelectorComboBox.setSelectedId (1);
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cameraSelectorComboBox.onChange = [this] { cameraChanged(); };
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addAndMakeVisible (snapshotButton);
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snapshotButton.onClick = [this] { takeSnapshot(); };
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snapshotButton.setEnabled (false);
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addAndMakeVisible (recordMovieButton);
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recordMovieButton.onClick = [this] { startRecording(); };
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recordMovieButton.setEnabled (false);
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addAndMakeVisible (lastSnapshot);
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cameraSelectorComboBox.setSelectedId (2);
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setSize (500, 500);
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#if JUCE_IOS || JUCE_ANDROID
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setPortraitOrientationEnabled (true);
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#endif
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}
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~CameraDemo() override
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{
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#if JUCE_IOS || JUCE_ANDROID
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setPortraitOrientationEnabled (false);
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#endif
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#if JUCE_ANDROID
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audioDeviceManager.restartLastAudioDevice();
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#endif
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}
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//==============================================================================
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void paint (Graphics& g) override
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{
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g.fillAll (Colours::black);
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}
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void resized() override
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{
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auto r = getLocalBounds().reduced (5);
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auto top = r.removeFromTop (25);
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cameraSelectorComboBox.setBounds (top.removeFromLeft (250));
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r.removeFromTop (4);
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top = r.removeFromTop (25);
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snapshotButton.changeWidthToFitText (24);
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snapshotButton.setBounds (top.removeFromLeft (snapshotButton.getWidth()));
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top.removeFromLeft (4);
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recordMovieButton.changeWidthToFitText (24);
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recordMovieButton.setBounds (top.removeFromLeft (recordMovieButton.getWidth()));
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r.removeFromTop (4);
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auto previewArea = shouldUseLandscapeLayout() ? r.removeFromLeft (r.getWidth() / 2)
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: r.removeFromTop (r.getHeight() / 2);
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if (cameraPreviewComp.get() != nullptr)
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cameraPreviewComp->setBounds (previewArea);
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if (shouldUseLandscapeLayout())
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r.removeFromLeft (4);
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else
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r.removeFromTop (4);
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lastSnapshot.setBounds (r);
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}
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private:
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//==============================================================================
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// if this PIP is running inside the demo runner, we'll use the shared device manager instead
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#ifndef JUCE_DEMO_RUNNER
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AudioDeviceManager audioDeviceManager;
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#else
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AudioDeviceManager& audioDeviceManager { getSharedAudioDeviceManager (0, 2) };
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#endif
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std::unique_ptr<CameraDevice> cameraDevice;
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std::unique_ptr<Component> cameraPreviewComp;
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ImageComponent lastSnapshot;
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ComboBox cameraSelectorComboBox { "Camera" };
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TextButton snapshotButton { "Take a snapshot" };
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#if ! JUCE_ANDROID && ! JUCE_IOS
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TextButton recordMovieButton { "Record a movie (to your desktop)..." };
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#else
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TextButton recordMovieButton { "Record a movie" };
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#endif
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bool recordingMovie = false;
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File recordingFile;
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bool contentSharingPending = false;
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void setPortraitOrientationEnabled (bool shouldBeEnabled)
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{
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auto allowedOrientations = Desktop::getInstance().getOrientationsEnabled();
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if (shouldBeEnabled)
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allowedOrientations |= Desktop::upright;
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else
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allowedOrientations &= ~Desktop::upright;
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Desktop::getInstance().setOrientationsEnabled (allowedOrientations);
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}
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bool shouldUseLandscapeLayout() const noexcept
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{
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#if JUCE_ANDROID || JUCE_IOS
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auto orientation = Desktop::getInstance().getCurrentOrientation();
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return orientation == Desktop::rotatedClockwise || orientation == Desktop::rotatedAntiClockwise;
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#else
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return false;
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#endif
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}
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void updateCameraList()
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{
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cameraSelectorComboBox.clear();
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cameraSelectorComboBox.addItem ("No camera", 1);
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cameraSelectorComboBox.addSeparator();
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auto cameras = CameraDevice::getAvailableDevices();
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for (int i = 0; i < cameras.size(); ++i)
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cameraSelectorComboBox.addItem (cameras[i], i + 2);
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}
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void cameraChanged()
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{
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// This is called when the user chooses a camera from the drop-down list.
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#if JUCE_IOS
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// On iOS, when switching camera, open the new camera first, so that it can
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// share the underlying camera session with the old camera. Otherwise, the
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// session would have to be closed first, which can take several seconds.
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if (cameraSelectorComboBox.getSelectedId() == 1)
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cameraDevice.reset();
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#else
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cameraDevice.reset();
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#endif
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cameraPreviewComp.reset();
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recordingMovie = false;
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if (cameraSelectorComboBox.getSelectedId() > 1)
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{
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#if JUCE_ANDROID || JUCE_IOS
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openCameraAsync();
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#else
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cameraDeviceOpenResult (CameraDevice::openDevice (cameraSelectorComboBox.getSelectedId() - 2), {});
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#endif
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}
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else
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{
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snapshotButton .setEnabled (cameraDevice != nullptr && ! contentSharingPending);
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recordMovieButton.setEnabled (cameraDevice != nullptr && ! contentSharingPending);
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resized();
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}
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}
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void openCameraAsync()
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{
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SafePointer<CameraDemo> safeThis (this);
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CameraDevice::openDeviceAsync (cameraSelectorComboBox.getSelectedId() - 2,
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[safeThis] (CameraDevice* device, const String& error) mutable
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{
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if (safeThis)
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safeThis->cameraDeviceOpenResult (device, error);
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});
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}
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void cameraDeviceOpenResult (CameraDevice* device, const String& error)
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{
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// If camera opening worked, create a preview component for it..
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cameraDevice.reset (device);
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if (cameraDevice.get() != nullptr)
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{
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#if JUCE_ANDROID
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SafePointer<CameraDemo> safeThis (this);
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cameraDevice->onErrorOccurred = [safeThis] (const String& cameraError) mutable { if (safeThis) safeThis->errorOccurred (cameraError); };
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#endif
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cameraPreviewComp.reset (cameraDevice->createViewerComponent());
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addAndMakeVisible (cameraPreviewComp.get());
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}
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else
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{
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AlertWindow::showMessageBoxAsync (MessageBoxIconType::WarningIcon, "Camera open failed",
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"Camera open failed, reason: " + error);
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}
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snapshotButton .setEnabled (cameraDevice.get() != nullptr && ! contentSharingPending);
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recordMovieButton.setEnabled (cameraDevice.get() != nullptr && ! contentSharingPending);
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resized();
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}
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void startRecording()
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{
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if (cameraDevice.get() != nullptr)
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{
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// The user has clicked the record movie button..
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if (! recordingMovie)
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{
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// Start recording to a file on the user's desktop..
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recordingMovie = true;
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#if JUCE_ANDROID || JUCE_IOS
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recordingFile = File::getSpecialLocation (File::tempDirectory)
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#else
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recordingFile = File::getSpecialLocation (File::userDesktopDirectory)
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#endif
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.getNonexistentChildFile ("JuceCameraVideoDemo", CameraDevice::getFileExtension());
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#if JUCE_ANDROID
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// Android does not support taking pictures while recording video.
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snapshotButton.setEnabled (false);
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#endif
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cameraSelectorComboBox.setEnabled (false);
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cameraDevice->startRecordingToFile (recordingFile);
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recordMovieButton.setButtonText ("Stop Recording");
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}
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else
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{
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// Already recording, so stop...
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recordingMovie = false;
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cameraDevice->stopRecording();
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#if ! JUCE_ANDROID && ! JUCE_IOS
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recordMovieButton.setButtonText ("Start recording (to a file on your desktop)");
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#else
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recordMovieButton.setButtonText ("Record a movie");
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#endif
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cameraSelectorComboBox.setEnabled (true);
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#if JUCE_ANDROID
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snapshotButton.setEnabled (true);
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#endif
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#if JUCE_CONTENT_SHARING
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URL url (recordingFile);
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snapshotButton .setEnabled (false);
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recordMovieButton.setEnabled (false);
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contentSharingPending = true;
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SafePointer<CameraDemo> safeThis (this);
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juce::ContentSharer::getInstance()->shareFiles ({url},
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[safeThis] (bool success, const String&) mutable
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{
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if (safeThis)
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safeThis->sharingFinished (success, false);
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});
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#endif
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}
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}
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}
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void takeSnapshot()
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{
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SafePointer<CameraDemo> safeThis (this);
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cameraDevice->takeStillPicture ([safeThis] (const Image& image) mutable { safeThis->imageReceived (image); });
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}
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// This is called by the camera device when a new image arrives
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void imageReceived (const Image& image)
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{
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if (! image.isValid())
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return;
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lastSnapshot.setImage (image);
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#if JUCE_CONTENT_SHARING
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auto imageFile = File::getSpecialLocation (File::tempDirectory).getNonexistentChildFile ("JuceCameraPhotoDemo", ".jpg");
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FileOutputStream stream (imageFile);
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if (stream.openedOk()
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&& JPEGImageFormat().writeImageToStream (image, stream))
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{
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URL url (imageFile);
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snapshotButton .setEnabled (false);
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recordMovieButton.setEnabled (false);
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contentSharingPending = true;
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SafePointer<CameraDemo> safeThis (this);
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juce::ContentSharer::getInstance()->shareFiles ({url},
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[safeThis] (bool success, const String&) mutable
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{
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if (safeThis)
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safeThis->sharingFinished (success, true);
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});
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}
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#endif
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}
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void errorOccurred (const String& error)
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{
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AlertWindow::showMessageBoxAsync (MessageBoxIconType::InfoIcon,
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"Camera Device Error",
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"An error has occurred: " + error + " Camera will be closed.");
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cameraDevice.reset();
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cameraSelectorComboBox.setSelectedId (1);
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snapshotButton .setEnabled (false);
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recordMovieButton.setEnabled (false);
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}
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void sharingFinished (bool success, bool isCapture)
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{
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AlertWindow::showMessageBoxAsync (MessageBoxIconType::InfoIcon,
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isCapture ? "Image sharing result" : "Video sharing result",
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success ? "Success!" : "Failed!");
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contentSharingPending = false;
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snapshotButton .setEnabled (true);
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recordMovieButton.setEnabled (true);
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}
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (CameraDemo)
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};
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