media/libstagefright/CameraSourceTimeLapse.cpp - platform/frameworks/av - Git at Google

 /*
  * Copyright (C) 2010 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.
  */

 #include <inttypes.h>

 //#define LOG_NDEBUG 0
 #define LOG_TAG "CameraSourceTimeLapse"

 #include <media/hardware/HardwareAPI.h>
 #include <binder/IPCThreadState.h>
 #include <binder/MemoryBase.h>
 #include <binder/MemoryHeapBase.h>
 #include <media/stagefright/foundation/ADebug.h>
 #include <media/stagefright/CameraSource.h>
 #include <media/stagefright/CameraSourceTimeLapse.h>
 #include <media/stagefright/MetaData.h>
 #include <camera/Camera.h>
 #include <camera/CameraParameters.h>
 #include <utils/String8.h>
 #include <utils/Vector.h>

 namespace android {

 // static
 CameraSourceTimeLapse *CameraSourceTimeLapse::CreateFromCamera(
         const sp<hardware::ICamera> &camera,
         const sp<ICameraRecordingProxy> &proxy,
         int32_t cameraId,
         const String16& clientName,
         uid_t clientUid,
         pid_t clientPid,
         Size videoSize,
         int32_t videoFrameRate,
         const sp<IGraphicBufferProducer>& surface,
         int64_t timeBetweenFrameCaptureUs) {

     CameraSourceTimeLapse *source = new
             CameraSourceTimeLapse(camera, proxy, cameraId,
                 clientName, clientUid, clientPid,
                 videoSize, videoFrameRate, surface,
                 timeBetweenFrameCaptureUs);

     if (source != NULL) {
         if (source->initCheck() != OK) {
             delete source;
             return NULL;
         }
     }
     return source;
 }

 CameraSourceTimeLapse::CameraSourceTimeLapse(
         const sp<hardware::ICamera>& camera,
         const sp<ICameraRecordingProxy>& proxy,
         int32_t cameraId,
         const String16& clientName,
         uid_t clientUid,
         pid_t clientPid,
         Size videoSize,
         int32_t videoFrameRate,
         const sp<IGraphicBufferProducer>& surface,
         int64_t timeBetweenFrameCaptureUs)
       : CameraSource(camera, proxy, cameraId, clientName, clientUid, clientPid,
                 videoSize, videoFrameRate, surface),
       mTimeBetweenTimeLapseVideoFramesUs(1E6/videoFrameRate),
       mLastTimeLapseFrameRealTimestampUs(0),
       mSkipCurrentFrame(false) {

     mTimeBetweenFrameCaptureUs = timeBetweenFrameCaptureUs;
     ALOGD("starting time lapse mode: %" PRId64 " us",
         mTimeBetweenFrameCaptureUs);

     mVideoWidth = videoSize.width;
     mVideoHeight = videoSize.height;

     if (OK == mInitCheck && !trySettingVideoSize(videoSize.width, videoSize.height)) {
         releaseCamera();
         mInitCheck = NO_INIT;
     }

     // Initialize quick stop variables.
     mQuickStop = false;
     mForceRead = false;
     mLastReadBufferCopy = NULL;
     mStopWaitingForIdleCamera = false;
 }

 CameraSourceTimeLapse::~CameraSourceTimeLapse() {
     if (mLastReadBufferCopy) {
         mLastReadBufferCopy->release();
         mLastReadBufferCopy = NULL;
     }
 }

 void CameraSourceTimeLapse::startQuickReadReturns() {
     ALOGV("startQuickReadReturns");
     Mutex::Autolock autoLock(mQuickStopLock);

     // Enable quick stop mode.
     mQuickStop = true;

     // Force dataCallbackTimestamp() coming from the video camera to
     // not skip the next frame as we want read() to get a get a frame
     // right away.
     mForceRead = true;
 }

 bool CameraSourceTimeLapse::trySettingVideoSize(
         int32_t width, int32_t height) {

     ALOGV("trySettingVideoSize");
     int64_t token = IPCThreadState::self()->clearCallingIdentity();
     String8 s = mCamera->getParameters();

     CameraParameters params(s);
     Vector<Size> supportedSizes;
     params.getSupportedVideoSizes(supportedSizes);
     bool videoOutputSupported = false;
     if (supportedSizes.size() == 0) {
         params.getSupportedPreviewSizes(supportedSizes);
     } else {
         videoOutputSupported = true;
     }

     bool videoSizeSupported = false;
     for (size_t i = 0; i < supportedSizes.size(); ++i) {
         int32_t pictureWidth = supportedSizes[i].width;
         int32_t pictureHeight = supportedSizes[i].height;

         if ((pictureWidth == width) && (pictureHeight == height)) {
             videoSizeSupported = true;
         }
     }

     bool isSuccessful = false;
     if (videoSizeSupported) {
         ALOGV("Video size (%d, %d) is supported", width, height);
         if (videoOutputSupported) {
             params.setVideoSize(width, height);
         } else {
             params.setPreviewSize(width, height);
         }
         if (mCamera->setParameters(params.flatten()) == OK) {
             isSuccessful = true;
         } else {
             ALOGE("Failed to set preview size to %dx%d", width, height);
             isSuccessful = false;
         }
     }

     IPCThreadState::self()->restoreCallingIdentity(token);
     return isSuccessful;
 }

 void CameraSourceTimeLapse::signalBufferReturned(MediaBufferBase* buffer) {
     ALOGV("signalBufferReturned");
     Mutex::Autolock autoLock(mQuickStopLock);
     if (mQuickStop && (buffer == mLastReadBufferCopy)) {
         buffer->setObserver(NULL);
         buffer->release();
         mLastReadBufferCopy = NULL;
         mForceRead = true;
     } else {
         return CameraSource::signalBufferReturned(buffer);
     }
 }

 void createMediaBufferCopy(
         const MediaBufferBase& sourceBuffer,
         int64_t frameTime,
         MediaBufferBase **newBuffer) {

     ALOGV("createMediaBufferCopy");
     size_t sourceSize = sourceBuffer.size();
     void* sourcePointer = sourceBuffer.data();

     (*newBuffer) = new MediaBuffer(sourceSize);
     memcpy((*newBuffer)->data(), sourcePointer, sourceSize);

     (*newBuffer)->meta_data().setInt64(kKeyTime, frameTime);

 }

 void CameraSourceTimeLapse::fillLastReadBufferCopy(MediaBufferBase& sourceBuffer) {
     ALOGV("fillLastReadBufferCopy");
     int64_t frameTime;
     CHECK(sourceBuffer.meta_data().findInt64(kKeyTime, &frameTime));
     createMediaBufferCopy(sourceBuffer, frameTime, &mLastReadBufferCopy);
     mLastReadBufferCopy->add_ref();
     mLastReadBufferCopy->setObserver(this);
 }

 status_t CameraSourceTimeLapse::read(
         MediaBufferBase **buffer, const ReadOptions *options) {
     ALOGV("read");
     if (mLastReadBufferCopy == NULL) {
         mLastReadStatus = CameraSource::read(buffer, options);

         // mQuickStop may have turned to true while read was blocked.
         // Make a copy of the buffer in that case.
         Mutex::Autolock autoLock(mQuickStopLock);
         if (mQuickStop && *buffer) {
             fillLastReadBufferCopy(**buffer);
         }
         return mLastReadStatus;
     } else {
         (*buffer) = mLastReadBufferCopy;
         (*buffer)->add_ref();
         return mLastReadStatus;
     }
 }

 bool CameraSourceTimeLapse::skipCurrentFrame(int64_t /* timestampUs */) {
     ALOGV("skipCurrentFrame");
     if (mSkipCurrentFrame) {
         mSkipCurrentFrame = false;
         return true;
     } else {
         return false;
     }
 }

 bool CameraSourceTimeLapse::skipFrameAndModifyTimeStamp(int64_t *timestampUs) {
     ALOGV("skipFrameAndModifyTimeStamp");
     if (mLastTimeLapseFrameRealTimestampUs == 0) {
         // First time lapse frame. Initialize mLastTimeLapseFrameRealTimestampUs
         // to current time (timestampUs) and save frame data.
         ALOGV("dataCallbackTimestamp timelapse: initial frame");

         mLastTimeLapseFrameRealTimestampUs = *timestampUs;
         return false;
     }

     {
         Mutex::Autolock autoLock(mQuickStopLock);

         // mForceRead may be set to true by startQuickReadReturns(). In that
         // case don't skip this frame.
         if (mForceRead) {
             ALOGV("dataCallbackTimestamp timelapse: forced read");
             mForceRead = false;
             *timestampUs =
                 mLastFrameTimestampUs + mTimeBetweenTimeLapseVideoFramesUs;

             // Really make sure that this video recording frame will not be dropped.
             if (*timestampUs < mStartTimeUs) {
                 ALOGI("set timestampUs to start time stamp %" PRId64 " us", mStartTimeUs);
                 *timestampUs = mStartTimeUs;
             }
             return false;
         }
     }

     // Workaround to bypass the first 2 input frames for skipping.
     // The first 2 output frames from the encoder are: decoder specific info and
     // the compressed video frame data for the first input video frame.
     if (mNumFramesEncoded >= 1 && *timestampUs <
         (mLastTimeLapseFrameRealTimestampUs + mTimeBetweenFrameCaptureUs)) {
         // Skip all frames from last encoded frame until
         // sufficient time (mTimeBetweenFrameCaptureUs) has passed.
         // Tell the camera to release its recording frame and return.
         ALOGV("dataCallbackTimestamp timelapse: skipping intermediate frame");
         return true;
     } else {
         // Desired frame has arrived after mTimeBetweenFrameCaptureUs time:
         // - Reset mLastTimeLapseFrameRealTimestampUs to current time.
         // - Artificially modify timestampUs to be one frame time (1/framerate) ahead
         // of the last encoded frame's time stamp.
         ALOGV("dataCallbackTimestamp timelapse: got timelapse frame");

         mLastTimeLapseFrameRealTimestampUs = *timestampUs;
         *timestampUs = mLastFrameTimestampUs + mTimeBetweenTimeLapseVideoFramesUs;
         return false;
     }
     return false;
 }

 void CameraSourceTimeLapse::processBufferQueueFrame(BufferItem& buffer) {
     ALOGV("processBufferQueueFrame");
     int64_t timestampUs = buffer.mTimestamp / 1000;
     mSkipCurrentFrame = skipFrameAndModifyTimeStamp(&timestampUs);
     buffer.mTimestamp = timestampUs * 1000;
     CameraSource::processBufferQueueFrame(buffer);
 }

 }  // namespace android
	/*
	* Copyright (C) 2010 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.
	*/

	#include <inttypes.h>

	//#define LOG_NDEBUG 0
	#define LOG_TAG "CameraSourceTimeLapse"

	#include <media/hardware/HardwareAPI.h>
	#include <binder/IPCThreadState.h>
	#include <binder/MemoryBase.h>
	#include <binder/MemoryHeapBase.h>
	#include <media/stagefright/foundation/ADebug.h>
	#include <media/stagefright/CameraSource.h>
	#include <media/stagefright/CameraSourceTimeLapse.h>
	#include <media/stagefright/MetaData.h>
	#include <camera/Camera.h>
	#include <camera/CameraParameters.h>
	#include <utils/String8.h>
	#include <utils/Vector.h>

	namespace android {

	// static
	CameraSourceTimeLapse *CameraSourceTimeLapse::CreateFromCamera(
	const sp<hardware::ICamera> &camera,
	const sp<ICameraRecordingProxy> &proxy,
	int32_t cameraId,
	const String16& clientName,
	uid_t clientUid,
	pid_t clientPid,
	Size videoSize,
	int32_t videoFrameRate,
	const sp<IGraphicBufferProducer>& surface,
	int64_t timeBetweenFrameCaptureUs) {

	CameraSourceTimeLapse *source = new
	CameraSourceTimeLapse(camera, proxy, cameraId,
	clientName, clientUid, clientPid,
	videoSize, videoFrameRate, surface,
	timeBetweenFrameCaptureUs);

	if (source != NULL) {
	if (source->initCheck() != OK) {
	delete source;
	return NULL;
	}
	}
	return source;
	}

	CameraSourceTimeLapse::CameraSourceTimeLapse(
	const sp<hardware::ICamera>& camera,
	const sp<ICameraRecordingProxy>& proxy,
	int32_t cameraId,
	const String16& clientName,
	uid_t clientUid,
	pid_t clientPid,
	Size videoSize,
	int32_t videoFrameRate,
	const sp<IGraphicBufferProducer>& surface,
	int64_t timeBetweenFrameCaptureUs)
	: CameraSource(camera, proxy, cameraId, clientName, clientUid, clientPid,
	videoSize, videoFrameRate, surface),
	mTimeBetweenTimeLapseVideoFramesUs(1E6/videoFrameRate),
	mLastTimeLapseFrameRealTimestampUs(0),
	mSkipCurrentFrame(false) {

	mTimeBetweenFrameCaptureUs = timeBetweenFrameCaptureUs;
	ALOGD("starting time lapse mode: %" PRId64 " us",
	mTimeBetweenFrameCaptureUs);

	mVideoWidth = videoSize.width;
	mVideoHeight = videoSize.height;

	if (OK == mInitCheck && !trySettingVideoSize(videoSize.width, videoSize.height)) {
	releaseCamera();
	mInitCheck = NO_INIT;
	}

	// Initialize quick stop variables.
	mQuickStop = false;
	mForceRead = false;
	mLastReadBufferCopy = NULL;
	mStopWaitingForIdleCamera = false;
	}

	CameraSourceTimeLapse::~CameraSourceTimeLapse() {
	if (mLastReadBufferCopy) {
	mLastReadBufferCopy->release();
	mLastReadBufferCopy = NULL;
	}
	}

	void CameraSourceTimeLapse::startQuickReadReturns() {
	ALOGV("startQuickReadReturns");
	Mutex::Autolock autoLock(mQuickStopLock);

	// Enable quick stop mode.
	mQuickStop = true;

	// Force dataCallbackTimestamp() coming from the video camera to
	// not skip the next frame as we want read() to get a get a frame
	// right away.
	mForceRead = true;
	}

	bool CameraSourceTimeLapse::trySettingVideoSize(
	int32_t width, int32_t height) {

	ALOGV("trySettingVideoSize");
	int64_t token = IPCThreadState::self()->clearCallingIdentity();
	String8 s = mCamera->getParameters();

	CameraParameters params(s);
	Vector<Size> supportedSizes;
	params.getSupportedVideoSizes(supportedSizes);
	bool videoOutputSupported = false;
	if (supportedSizes.size() == 0) {
	params.getSupportedPreviewSizes(supportedSizes);
	} else {
	videoOutputSupported = true;
	}

	bool videoSizeSupported = false;
	for (size_t i = 0; i < supportedSizes.size(); ++i) {
	int32_t pictureWidth = supportedSizes[i].width;
	int32_t pictureHeight = supportedSizes[i].height;

	if ((pictureWidth == width) && (pictureHeight == height)) {
	videoSizeSupported = true;
	}
	}

	bool isSuccessful = false;
	if (videoSizeSupported) {
	ALOGV("Video size (%d, %d) is supported", width, height);
	if (videoOutputSupported) {
	params.setVideoSize(width, height);
	} else {
	params.setPreviewSize(width, height);
	}
	if (mCamera->setParameters(params.flatten()) == OK) {
	isSuccessful = true;
	} else {
	ALOGE("Failed to set preview size to %dx%d", width, height);
	isSuccessful = false;
	}
	}

	IPCThreadState::self()->restoreCallingIdentity(token);
	return isSuccessful;
	}

	void CameraSourceTimeLapse::signalBufferReturned(MediaBufferBase* buffer) {
	ALOGV("signalBufferReturned");
	Mutex::Autolock autoLock(mQuickStopLock);
	if (mQuickStop && (buffer == mLastReadBufferCopy)) {
	buffer->setObserver(NULL);
	buffer->release();
	mLastReadBufferCopy = NULL;
	mForceRead = true;
	} else {
	return CameraSource::signalBufferReturned(buffer);
	}
	}

	void createMediaBufferCopy(
	const MediaBufferBase& sourceBuffer,
	int64_t frameTime,
	MediaBufferBase **newBuffer) {

	ALOGV("createMediaBufferCopy");
	size_t sourceSize = sourceBuffer.size();
	void* sourcePointer = sourceBuffer.data();

	(*newBuffer) = new MediaBuffer(sourceSize);
	memcpy((*newBuffer)->data(), sourcePointer, sourceSize);

	(*newBuffer)->meta_data().setInt64(kKeyTime, frameTime);

	}

	void CameraSourceTimeLapse::fillLastReadBufferCopy(MediaBufferBase& sourceBuffer) {
	ALOGV("fillLastReadBufferCopy");
	int64_t frameTime;
	CHECK(sourceBuffer.meta_data().findInt64(kKeyTime, &frameTime));
	createMediaBufferCopy(sourceBuffer, frameTime, &mLastReadBufferCopy);
	mLastReadBufferCopy->add_ref();
	mLastReadBufferCopy->setObserver(this);
	}

	status_t CameraSourceTimeLapse::read(
	MediaBufferBase *buffer, const ReadOptions options) {
	ALOGV("read");
	if (mLastReadBufferCopy == NULL) {
	mLastReadStatus = CameraSource::read(buffer, options);

	// mQuickStop may have turned to true while read was blocked.
	// Make a copy of the buffer in that case.
	Mutex::Autolock autoLock(mQuickStopLock);
	if (mQuickStop && *buffer) {
	fillLastReadBufferCopy(**buffer);
	}
	return mLastReadStatus;
	} else {
	(*buffer) = mLastReadBufferCopy;
	(*buffer)->add_ref();
	return mLastReadStatus;
	}
	}

	bool CameraSourceTimeLapse::skipCurrentFrame(int64_t /* timestampUs */) {
	ALOGV("skipCurrentFrame");
	if (mSkipCurrentFrame) {
	mSkipCurrentFrame = false;
	return true;
	} else {
	return false;
	}
	}

	bool CameraSourceTimeLapse::skipFrameAndModifyTimeStamp(int64_t *timestampUs) {
	ALOGV("skipFrameAndModifyTimeStamp");
	if (mLastTimeLapseFrameRealTimestampUs == 0) {
	// First time lapse frame. Initialize mLastTimeLapseFrameRealTimestampUs
	// to current time (timestampUs) and save frame data.
	ALOGV("dataCallbackTimestamp timelapse: initial frame");

	mLastTimeLapseFrameRealTimestampUs = *timestampUs;
	return false;
	}

	{
	Mutex::Autolock autoLock(mQuickStopLock);

	// mForceRead may be set to true by startQuickReadReturns(). In that
	// case don't skip this frame.
	if (mForceRead) {
	ALOGV("dataCallbackTimestamp timelapse: forced read");
	mForceRead = false;
	*timestampUs =
	mLastFrameTimestampUs + mTimeBetweenTimeLapseVideoFramesUs;

	// Really make sure that this video recording frame will not be dropped.
	if (*timestampUs < mStartTimeUs) {
	ALOGI("set timestampUs to start time stamp %" PRId64 " us", mStartTimeUs);
	*timestampUs = mStartTimeUs;
	}
	return false;
	}
	}

	// Workaround to bypass the first 2 input frames for skipping.
	// The first 2 output frames from the encoder are: decoder specific info and
	// the compressed video frame data for the first input video frame.
	if (mNumFramesEncoded >= 1 && *timestampUs <
	(mLastTimeLapseFrameRealTimestampUs + mTimeBetweenFrameCaptureUs)) {
	// Skip all frames from last encoded frame until
	// sufficient time (mTimeBetweenFrameCaptureUs) has passed.
	// Tell the camera to release its recording frame and return.
	ALOGV("dataCallbackTimestamp timelapse: skipping intermediate frame");
	return true;
	} else {
	// Desired frame has arrived after mTimeBetweenFrameCaptureUs time:
	// - Reset mLastTimeLapseFrameRealTimestampUs to current time.
	// - Artificially modify timestampUs to be one frame time (1/framerate) ahead
	// of the last encoded frame's time stamp.
	ALOGV("dataCallbackTimestamp timelapse: got timelapse frame");

	mLastTimeLapseFrameRealTimestampUs = *timestampUs;
	*timestampUs = mLastFrameTimestampUs + mTimeBetweenTimeLapseVideoFramesUs;
	return false;
	}
	return false;
	}

	void CameraSourceTimeLapse::processBufferQueueFrame(BufferItem& buffer) {
	ALOGV("processBufferQueueFrame");
	int64_t timestampUs = buffer.mTimestamp / 1000;
	mSkipCurrentFrame = skipFrameAndModifyTimeStamp(&timestampUs);
	buffer.mTimestamp = timestampUs * 1000;
	CameraSource::processBufferQueueFrame(buffer);
	}

	} // namespace android