gecko-dev/dom/camera/GonkCameraSource.h

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/*
* Copyright (C) 2009 The Android Open Source Project
*
* 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 GONK_CAMERA_SOURCE_H_
#define GONK_CAMERA_SOURCE_H_
#include <media/stagefright/MediaBuffer.h>
#include <media/stagefright/MediaSource.h>
#include <camera/CameraParameters.h>
#include <utils/List.h>
#include <utils/RefBase.h>
#include <utils/String16.h>
#include "GonkCameraHwMgr.h"
namespace mozilla {
class ICameraControl;
}
namespace android {
class IMemory;
class GonkCameraSource : public MediaSource, public MediaBufferObserver {
public:
static GonkCameraSource *Create(const sp<GonkCameraHardware>& aCameraHw,
Size videoSize,
int32_t frameRate,
bool storeMetaDataInVideoBuffers = false);
static GonkCameraSource *Create(mozilla::ICameraControl* aControl,
Size videoSize,
int32_t frameRate);
virtual ~GonkCameraSource();
virtual status_t start(MetaData *params = NULL);
virtual status_t stop() { return reset(); }
virtual status_t read(
MediaBuffer **buffer, const ReadOptions *options = NULL);
/**
* Check whether a GonkCameraSource object is properly initialized.
* Must call this method before stop().
* @return OK if initialization has successfully completed.
*/
virtual status_t initCheck() const;
/**
* Returns the MetaData associated with the GonkCameraSource,
* including:
* kKeyColorFormat: YUV color format of the video frames
* kKeyWidth, kKeyHeight: dimension (in pixels) of the video frames
* kKeySampleRate: frame rate in frames per second
* kKeyMIMEType: always fixed to be MEDIA_MIMETYPE_VIDEO_RAW
*/
virtual sp<MetaData> getFormat();
/**
* Tell whether this camera source stores meta data or real YUV
* frame data in video buffers.
*
* @return true if meta data is stored in the video
* buffers; false if real YUV data is stored in
* the video buffers.
*/
bool isMetaDataStoredInVideoBuffers() const;
virtual void signalBufferReturned(MediaBuffer* buffer);
/**
* It sends recording frames to listener directly in the same thread.
* Because recording frame is critical resource and it should not be
* propagated to other thread as much as possible or there could be frame
* rate jitter due to camera HAL waiting for resource.
*/
class DirectBufferListener : public RefBase {
public:
DirectBufferListener() {};
virtual status_t BufferAvailable(MediaBuffer* aBuffer) = 0;
protected:
virtual ~DirectBufferListener() {}
};
status_t AddDirectBufferListener(DirectBufferListener* aListener);
protected:
enum CameraFlags {
FLAGS_SET_CAMERA = 1L << 0,
FLAGS_HOT_CAMERA = 1L << 1,
};
int32_t mCameraFlags;
Size mVideoSize;
int32_t mNumInputBuffers;
int32_t mVideoFrameRate;
int32_t mColorFormat;
status_t mInitCheck;
sp<MetaData> mMeta;
int64_t mStartTimeUs;
int32_t mNumFramesReceived;
int64_t mLastFrameTimestampUs;
bool mStarted;
int32_t mNumFramesEncoded;
// Time between capture of two frames.
int64_t mTimeBetweenFrameCaptureUs;
GonkCameraSource(const sp<GonkCameraHardware>& aCameraHw,
Size videoSize, int32_t frameRate,
bool storeMetaDataInVideoBuffers = false);
virtual int startCameraRecording();
virtual void stopCameraRecording();
virtual void releaseRecordingFrame(const sp<IMemory>& frame);
// Returns true if need to skip the current frame.
// Called from dataCallbackTimestamp.
virtual bool skipCurrentFrame(int64_t timestampUs) {return false;}
friend class GonkCameraSourceListener;
// Callback called when still camera raw data is available.
virtual void dataCallback(int32_t msgType, const sp<IMemory> &data) {}
virtual void dataCallbackTimestamp(int64_t timestampUs, int32_t msgType,
const sp<IMemory> &data);
private:
Mutex mLock;
Condition mFrameAvailableCondition;
Condition mFrameCompleteCondition;
List<sp<IMemory> > mFramesReceived;
List<sp<IMemory> > mFramesBeingEncoded;
List<int64_t> mFrameTimes;
bool mRateLimit;
int64_t mFirstFrameTimeUs;
int32_t mNumFramesDropped;
int32_t mNumGlitches;
int64_t mGlitchDurationThresholdUs;
bool mCollectStats;
bool mIsMetaDataStoredInVideoBuffers;
sp<GonkCameraHardware> mCameraHw;
sp<DirectBufferListener> mDirectBufferListener;
void releaseQueuedFrames();
void releaseOneRecordingFrame(const sp<IMemory>& frame);
status_t init(Size videoSize, int32_t frameRate,
bool storeMetaDataInVideoBuffers);
status_t isCameraColorFormatSupported(const CameraParameters& params);
status_t configureCamera(CameraParameters* params,
int32_t width, int32_t height,
int32_t frameRate);
status_t checkVideoSize(const CameraParameters& params,
int32_t width, int32_t height);
status_t checkFrameRate(const CameraParameters& params,
int32_t frameRate);
void releaseCamera();
status_t reset();
GonkCameraSource(const GonkCameraSource &);
GonkCameraSource &operator=(const GonkCameraSource &);
};
} // namespace android
#endif // GONK_CAMERA_SOURCE_H_