diff options
Diffstat (limited to 'src/plugins/android/jar/src/org/qtproject/qt/android/multimedia/QtCameraListener.java')
| -rw-r--r-- | src/plugins/android/jar/src/org/qtproject/qt/android/multimedia/QtCameraListener.java | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/src/plugins/android/jar/src/org/qtproject/qt/android/multimedia/QtCameraListener.java b/src/plugins/android/jar/src/org/qtproject/qt/android/multimedia/QtCameraListener.java new file mode 100644 index 000000000..ff26d90c3 --- /dev/null +++ b/src/plugins/android/jar/src/org/qtproject/qt/android/multimedia/QtCameraListener.java @@ -0,0 +1,216 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtMultimedia of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +package org.qtproject.qt.android.multimedia; + +import android.hardware.Camera; +import android.graphics.ImageFormat; +import android.graphics.SurfaceTexture; +import android.util.Log; +import java.lang.Math; + +public class QtCameraListener implements Camera.ShutterCallback, + Camera.PictureCallback, + Camera.AutoFocusCallback, + Camera.PreviewCallback +{ + private static final String TAG = "Qt Camera"; + + private static final int BUFFER_POOL_SIZE = 2; + + private int m_cameraId = -1; + + private boolean m_notifyNewFrames = false; + private boolean m_notifyWhenFrameAvailable = false; + private byte[][] m_previewBuffers = null; + private byte[] m_lastPreviewBuffer = null; + private Camera.Size m_previewSize = null; + private int m_previewFormat = ImageFormat.NV21; // Default preview format on all devices + private int m_previewBytesPerLine = -1; + + private QtCameraListener(int id) + { + m_cameraId = id; + } + + public void notifyNewFrames(boolean notify) + { + m_notifyNewFrames = notify; + } + + public void notifyWhenFrameAvailable(boolean notify) + { + m_notifyWhenFrameAvailable = notify; + } + + public byte[] lastPreviewBuffer() + { + return m_lastPreviewBuffer; + } + + public int previewWidth() + { + if (m_previewSize == null) + return -1; + + return m_previewSize.width; + } + + public int previewHeight() + { + if (m_previewSize == null) + return -1; + + return m_previewSize.height; + } + + public int previewFormat() + { + return m_previewFormat; + } + + public int previewBytesPerLine() + { + return m_previewBytesPerLine; + } + + public void clearPreviewCallback(Camera camera) + { + camera.setPreviewCallbackWithBuffer(null); + } + + public void setupPreviewCallback(Camera camera) + { + // Clear previous callback (also clears added buffers) + clearPreviewCallback(camera); + m_lastPreviewBuffer = null; + + final Camera.Parameters params = camera.getParameters(); + m_previewSize = params.getPreviewSize(); + m_previewFormat = params.getPreviewFormat(); + + int bufferSizeNeeded = 0; + if (m_previewFormat == ImageFormat.YV12) { + // For YV12, bytes per line must be a multiple of 16 + final int yStride = (int) Math.ceil(m_previewSize.width / 16.0) * 16; + final int uvStride = (int) Math.ceil((yStride / 2) / 16.0) * 16; + final int ySize = yStride * m_previewSize.height; + final int uvSize = uvStride * m_previewSize.height / 2; + bufferSizeNeeded = ySize + uvSize * 2; + + m_previewBytesPerLine = yStride; + + } else { + double bytesPerPixel = ImageFormat.getBitsPerPixel(m_previewFormat) / 8.0; + bufferSizeNeeded = (int) Math.ceil(bytesPerPixel * m_previewSize.width * m_previewSize.height); + + // bytes per line are calculated only for the first plane + switch (m_previewFormat) { + case ImageFormat.NV21: + m_previewBytesPerLine = m_previewSize.width; // 1 byte per sample and tightly packed + break; + case ImageFormat.RGB_565: + case ImageFormat.YUY2: + m_previewBytesPerLine = m_previewSize.width * 2; // 2 bytes per pixel + break; + default: + m_previewBytesPerLine = -1; + break; + } + } + + // We could keep the same buffers when they are already bigger than the required size + // but the Android doc says the size must match, so in doubt just replace them. + if (m_previewBuffers == null || m_previewBuffers[0].length != bufferSizeNeeded) + m_previewBuffers = new byte[BUFFER_POOL_SIZE][bufferSizeNeeded]; + + // Add callback and queue all buffers + camera.setPreviewCallbackWithBuffer(this); + for (byte[] buffer : m_previewBuffers) + camera.addCallbackBuffer(buffer); + } + + @Override + public void onPreviewFrame(byte[] data, Camera camera) + { + // Re-enqueue the last buffer + if (m_lastPreviewBuffer != null) + camera.addCallbackBuffer(m_lastPreviewBuffer); + + m_lastPreviewBuffer = data; + + if (data != null) { + if (m_notifyWhenFrameAvailable) { + m_notifyWhenFrameAvailable = false; + notifyFrameAvailable(m_cameraId); + } + if (m_notifyNewFrames) { + notifyNewPreviewFrame(m_cameraId, data, + m_previewSize.width, m_previewSize.height, + m_previewFormat, + m_previewBytesPerLine); + } + } + } + + @Override + public void onShutter() + { + notifyPictureExposed(m_cameraId); + } + + @Override + public void onPictureTaken(byte[] data, Camera camera) + { + notifyPictureCaptured(m_cameraId, data); + } + + @Override + public void onAutoFocus(boolean success, Camera camera) + { + notifyAutoFocusComplete(m_cameraId, success); + } + + private static native void notifyAutoFocusComplete(int id, boolean success); + private static native void notifyPictureExposed(int id); + private static native void notifyPictureCaptured(int id, byte[] data); + private static native void notifyNewPreviewFrame(int id, byte[] data, int width, int height, + int pixelFormat, int bytesPerLine); + private static native void notifyFrameAvailable(int id); +} |