158 lines
4.4 KiB
C++
158 lines
4.4 KiB
C++
/*
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* Copyright (C) Texas Instruments - http://www.ti.com/
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef V4L_CAMERA_ADAPTER_H
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#define V4L_CAMERA_ADAPTER_H
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#include "CameraHal.h"
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#include "BaseCameraAdapter.h"
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#include "DebugUtils.h"
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namespace android {
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#define DEFAULT_PIXEL_FORMAT V4L2_PIX_FMT_YUYV
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#define NB_BUFFER 10
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#define DEVICE "/dev/video4"
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struct VideoInfo {
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struct v4l2_capability cap;
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struct v4l2_format format;
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struct v4l2_buffer buf;
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struct v4l2_requestbuffers rb;
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void *mem[NB_BUFFER];
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bool isStreaming;
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int width;
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int height;
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int formatIn;
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int framesizeIn;
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};
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/**
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* Class which completely abstracts the camera hardware interaction from camera hal
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* TODO: Need to list down here, all the message types that will be supported by this class
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Need to implement BufferProvider interface to use AllocateBuffer of OMX if needed
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*/
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class V4LCameraAdapter : public BaseCameraAdapter
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{
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public:
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/*--------------------Constant declarations----------------------------------------*/
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static const int32_t MAX_NO_BUFFERS = 20;
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///@remarks OMX Camera has six ports - buffer input, time input, preview, image, video, and meta data
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static const int MAX_NO_PORTS = 6;
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///Five second timeout
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static const int CAMERA_ADAPTER_TIMEOUT = 5000*1000;
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public:
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V4LCameraAdapter();
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~V4LCameraAdapter();
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///Initialzes the camera adapter creates any resources required
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virtual status_t initialize(CameraProperties::Properties*, int sensor_index=0);
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//APIs to configure Camera adapter and get the current parameter set
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virtual status_t setParameters(const CameraParameters& params);
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virtual void getParameters(CameraParameters& params);
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// API
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virtual status_t UseBuffersPreview(void* bufArr, int num);
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//API to flush the buffers for preview
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status_t flushBuffers();
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protected:
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//----------Parent class method implementation------------------------------------
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virtual status_t startPreview();
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virtual status_t stopPreview();
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virtual status_t useBuffers(CameraMode mode, void* bufArr, int num, size_t length, unsigned int queueable);
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virtual status_t fillThisBuffer(void* frameBuf, CameraFrame::FrameType frameType);
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virtual status_t getFrameSize(size_t &width, size_t &height);
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virtual status_t getPictureBufferSize(size_t &length, size_t bufferCount);
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virtual status_t getFrameDataSize(size_t &dataFrameSize, size_t bufferCount);
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virtual void onOrientationEvent(uint32_t orientation, uint32_t tilt);
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//-----------------------------------------------------------------------------
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private:
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class PreviewThread : public Thread {
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V4LCameraAdapter* mAdapter;
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public:
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PreviewThread(V4LCameraAdapter* hw) :
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Thread(false), mAdapter(hw) { }
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virtual void onFirstRef() {
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run("CameraPreviewThread", PRIORITY_URGENT_DISPLAY);
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}
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virtual bool threadLoop() {
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mAdapter->previewThread();
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// loop until we need to quit
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return true;
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}
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};
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//Used for calculation of the average frame rate during preview
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status_t recalculateFPS();
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char * GetFrame(int &index);
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int previewThread();
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public:
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private:
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int mPreviewBufferCount;
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KeyedVector<int, int> mPreviewBufs;
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mutable Mutex mPreviewBufsLock;
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CameraParameters mParams;
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bool mPreviewing;
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bool mCapturing;
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Mutex mLock;
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int mFrameCount;
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int mLastFrameCount;
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unsigned int mIter;
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nsecs_t mLastFPSTime;
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//variables holding the estimated framerate
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float mFPS, mLastFPS;
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int mSensorIndex;
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// protected by mLock
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sp<PreviewThread> mPreviewThread;
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struct VideoInfo *mVideoInfo;
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int mCameraHandle;
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int nQueued;
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int nDequeued;
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};
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}; //// namespace
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#endif //V4L_CAMERA_ADAPTER_H
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