/*
* Copyright (C) Texas Instruments - http://www.ti.com/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef V4L_CAMERA_ADAPTER_H
#define V4L_CAMERA_ADAPTER_H
#include <linux/videodev2.h>
#include "CameraHal.h"
#include "BaseCameraAdapter.h"
#include "DebugUtils.h"
namespace Ti {
namespace Camera {
#define DEFAULT_PIXEL_FORMAT V4L2_PIX_FMT_YUYV
#define NB_BUFFER 10
#define DEVICE "/dev/videoxx"
#define DEVICE_PATH "/dev/"
#define DEVICE_NAME "videoxx"
typedef int V4L_HANDLETYPE;
struct CapPixelformat {
uint32_t pixelformat;
const char *param;
};
struct CapResolution {
size_t width, height;
char param[10];
};
struct CapU32 {
uint32_t num;
const char *param;
};
typedef CapU32 CapFramerate;
struct VideoInfo {
struct v4l2_capability cap;
struct v4l2_format format;
struct v4l2_buffer buf;
struct v4l2_requestbuffers rb;
void *mem[NB_BUFFER];
void *CaptureBuffers[NB_BUFFER];
bool isStreaming;
int width;
int height;
int formatIn;
int framesizeIn;
};
typedef struct V4L_TI_CAPTYPE {
uint16_t ulPreviewFormatCount; // supported preview pixelformat count
uint32_t ePreviewFormats[32];
uint16_t ulPreviewResCount; // supported preview resolution sizes
CapResolution tPreviewRes[32];
uint16_t ulCaptureResCount; // supported capture resolution sizes
CapResolution tCaptureRes[32];
uint16_t ulFrameRateCount; // supported frame rate
uint16_t ulFrameRates[32];
}V4L_TI_CAPTYPE;
/**
* Class which completely abstracts the camera hardware interaction from camera hal
* TODO: Need to list down here, all the message types that will be supported by this class
Need to implement BufferProvider interface to use AllocateBuffer of OMX if needed
*/
class V4LCameraAdapter : public BaseCameraAdapter
{
public:
/*--------------------Constant declarations----------------------------------------*/
static const int32_t MAX_NO_BUFFERS = 20;
///@remarks OMX Camera has six ports - buffer input, time input, preview, image, video, and meta data
static const int MAX_NO_PORTS = 6;
///Five second timeout
static const int CAMERA_ADAPTER_TIMEOUT = 5000*1000;
public:
V4LCameraAdapter(size_t sensor_index);
~V4LCameraAdapter();
///Initialzes the camera adapter creates any resources required
virtual status_t initialize(CameraProperties::Properties*);
//APIs to configure Camera adapter and get the current parameter set
virtual status_t setParameters(const android::CameraParameters& params);
virtual void getParameters(android::CameraParameters& params);
// API
virtual status_t UseBuffersPreview(CameraBuffer *bufArr, int num);
virtual status_t UseBuffersCapture(CameraBuffer *bufArr, int num);
static status_t getCaps(const int sensorId, CameraProperties::Properties* params, V4L_HANDLETYPE handle);
protected:
//----------Parent class method implementation------------------------------------
virtual status_t startPreview();
virtual status_t stopPreview();
virtual status_t takePicture();
virtual status_t stopImageCapture();
virtual status_t autoFocus();
virtual status_t useBuffers(CameraMode mode, CameraBuffer *bufArr, int num, size_t length, unsigned int queueable);
virtual status_t fillThisBuffer(CameraBuffer *frameBuf, CameraFrame::FrameType frameType);
virtual status_t getFrameSize(size_t &width, size_t &height);
virtual status_t getPictureBufferSize(CameraFrame &frame, size_t bufferCount);
virtual status_t getFrameDataSize(size_t &dataFrameSize, size_t bufferCount);
virtual void onOrientationEvent(uint32_t orientation, uint32_t tilt);
//-----------------------------------------------------------------------------
private:
class PreviewThread : public android::Thread {
V4LCameraAdapter* mAdapter;
public:
PreviewThread(V4LCameraAdapter* hw) :
Thread(false), mAdapter(hw) { }
virtual void onFirstRef() {
run("CameraPreviewThread", android::PRIORITY_URGENT_DISPLAY);
}
virtual bool threadLoop() {
mAdapter->previewThread();
// loop until we need to quit
return true;
}
};
//Used for calculation of the average frame rate during preview
status_t recalculateFPS();
char * GetFrame(int &index);
int previewThread();
public:
private:
//capabilities data
static const CapPixelformat mPixelformats [];
static const CapResolution mPreviewRes [];
static const CapFramerate mFramerates [];
static const CapResolution mImageCapRes [];
//camera defaults
static const char DEFAULT_PREVIEW_FORMAT[];
static const char DEFAULT_PREVIEW_SIZE[];
static const char DEFAULT_FRAMERATE[];
static const char DEFAULT_NUM_PREV_BUFS[];
static const char DEFAULT_PICTURE_FORMAT[];
static const char DEFAULT_PICTURE_SIZE[];
static const char DEFAULT_FOCUS_MODE[];
static const char * DEFAULT_VSTAB;
static const char * DEFAULT_VNF;
static status_t insertDefaults(CameraProperties::Properties*, V4L_TI_CAPTYPE&);
static status_t insertCapabilities(CameraProperties::Properties*, V4L_TI_CAPTYPE&);
static status_t insertPreviewFormats(CameraProperties::Properties* , V4L_TI_CAPTYPE&);
static status_t insertPreviewSizes(CameraProperties::Properties* , V4L_TI_CAPTYPE&);
static status_t insertImageSizes(CameraProperties::Properties* , V4L_TI_CAPTYPE&);
static status_t insertFrameRates(CameraProperties::Properties* , V4L_TI_CAPTYPE&);
static status_t sortAscend(V4L_TI_CAPTYPE&, uint16_t ) ;
status_t v4lIoctl(int, int, void*);
status_t v4lInitMmap(int&);
status_t v4lInitUsrPtr(int&);
status_t v4lStartStreaming();
status_t v4lStopStreaming(int nBufferCount);
status_t v4lSetFormat(int, int, uint32_t);
status_t restartPreview();
int mPreviewBufferCount;
int mPreviewBufferCountQueueable;
int mCaptureBufferCount;
int mCaptureBufferCountQueueable;
android::KeyedVector<CameraBuffer *, int> mPreviewBufs;
android::KeyedVector<CameraBuffer *, int> mCaptureBufs;
mutable android::Mutex mPreviewBufsLock;
mutable android::Mutex mCaptureBufsLock;
mutable android::Mutex mStopPreviewLock;
android::CameraParameters mParams;
bool mPreviewing;
bool mCapturing;
android::Mutex mLock;
int mFrameCount;
int mLastFrameCount;
unsigned int mIter;
nsecs_t mLastFPSTime;
//variables holding the estimated framerate
float mFPS, mLastFPS;
int mSensorIndex;
// protected by mLock
android::sp<PreviewThread> mPreviewThread;
struct VideoInfo *mVideoInfo;
int mCameraHandle;
int nQueued;
int nDequeued;
};
} // namespace Camera
} // namespace Ti
#endif //V4L_CAMERA_ADAPTER_H