1 files changed, 158 insertions, 0 deletions
diff --git a/camera/inc/V4LCameraAdapter/V4LCameraAdapter.h b/camera/inc/V4LCameraAdapter/V4LCameraAdapter.h
new file mode 100644
index 0000000..b9d3952
--- /dev/null
+++ b/camera/inc/V4LCameraAdapter/V4LCameraAdapter.h
@@ -0,0 +1,158 @@
+/*
+ * 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 "CameraHal.h"
+#include "BaseCameraAdapter.h"
+#include "DebugUtils.h"
+
+namespace android {
+
+#define DEFAULT_PIXEL_FORMAT V4L2_PIX_FMT_YUYV
+#define NB_BUFFER 10
+#define DEVICE "/dev/video4"
+
+
+struct VideoInfo {
+    struct v4l2_capability cap;
+    struct v4l2_format format;
+    struct v4l2_buffer buf;
+    struct v4l2_requestbuffers rb;
+    void *mem[NB_BUFFER];
+    bool isStreaming;
+    int width;
+    int height;
+    int formatIn;
+    int framesizeIn;
+};
+
+
+/**
+  * 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();
+    ~V4LCameraAdapter();
+
+
+    ///Initialzes the camera adapter creates any resources required
+    virtual status_t initialize(CameraProperties::Properties*, int sensor_index=0);
+
+    //APIs to configure Camera adapter and get the current parameter set
+    virtual status_t setParameters(const CameraParameters& params);
+    virtual void getParameters(CameraParameters& params);
+
+    // API
+    virtual status_t UseBuffersPreview(void* bufArr, int num);
+
+    //API to flush the buffers for preview
+    status_t flushBuffers();
+
+protected:
+
+//----------Parent class method implementation------------------------------------
+    virtual status_t startPreview();
+    virtual status_t stopPreview();
+    virtual status_t useBuffers(CameraMode mode, void* bufArr, int num, size_t length, unsigned int queueable);
+    virtual status_t fillThisBuffer(void* frameBuf, CameraFrame::FrameType frameType);
+    virtual status_t getFrameSize(size_t &width, size_t &height);
+    virtual status_t getPictureBufferSize(size_t &length, 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 Thread {
+            V4LCameraAdapter* mAdapter;
+        public:
+            PreviewThread(V4LCameraAdapter* hw) :
+                    Thread(false), mAdapter(hw) { }
+            virtual void onFirstRef() {
+                run("CameraPreviewThread", 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:
+    int mPreviewBufferCount;
+    KeyedVector<int, int> mPreviewBufs;
+    mutable Mutex mPreviewBufsLock;
+
+    CameraParameters mParams;
+
+    bool mPreviewing;
+    bool mCapturing;
+    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
+     sp<PreviewThread>   mPreviewThread;
+
+     struct VideoInfo *mVideoInfo;
+     int mCameraHandle;
+
+
+    int nQueued;
+    int nDequeued;
+
+};
+}; //// namespace
+#endif //V4L_CAMERA_ADAPTER_H
+