libcamera/common_v2/Sec/SecCameraPreviewFrameScheduler.cpp - LeafOS-Devices/android_hardware_samsung_slsi-linaro_exynos - Gitiles

 /*
  * Copyright (C) 2014 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.
  */

 //#define LOG_NDEBUG 0
 #define LOG_TAG "SecCameraPreviewFrameScheduler"
 #include <utils/Log.h>
 #include <utils/Trace.h>

 #include <sys/time.h>

 #include <binder/IServiceManager.h>
 #include <gui/ISurfaceComposer.h>
 #include <ui/DisplayStatInfo.h>

 #include "SecCameraPreviewFrameScheduler.h"

 namespace android {

 SecCameraPreviewFrameScheduler::SecCameraPreviewFrameScheduler()
     : m_vsyncTime(0),
       m_vsyncPeriod(0),
       m_frameCount(0),
       m_frameDropCount(0),
       m_frameScheduleMode(FRAME_SCHEDULE_MODE_OFF),
       m_enableSkip(false),
       m_scpBufferMgr(NULL),
       m_previewWindow(NULL),
       m_frameMgr(NULL)
 {
     ALOGV("(%s[%d])", __FUNCTION__, __LINE__);
 }

 void SecCameraPreviewFrameScheduler::m_init()
 {
     ALOGD("(%s[%d]", __FUNCTION__, __LINE__);

     m_reset(FRAME_SCHEDULE_MODE_OFF, 30, true);
     m_previewFrameQ.setWaitTime(2000000000);

     m_scheduler = new m_schedulerThread(this,
         &SecCameraPreviewFrameScheduler::m_schedulerThreadFunc,
         "PreviewFrameScheduler", PRIORITY_DISPLAY);
 }

 void SecCameraPreviewFrameScheduler::m_setHandles(ExynosCameraBufferManager *scpBufferMgr,
     preview_stream_ops *previewWindow, ExynosCameraFrameManager *frameMgr)
 {
     ALOGD("(%s[%d]", __FUNCTION__, __LINE__);

     m_scpBufferMgr = scpBufferMgr;
     m_previewWindow = previewWindow;
     m_frameMgr = frameMgr;
 }

 void SecCameraPreviewFrameScheduler::m_reset(frame_schedule_mode_t mode, float targetFps, bool skip)
 {
     if(m_frameCount > 240) {
         ALOGD("(%s[%d]) m_frameCount=%lld, m_frameDropCount=%lld", __FUNCTION__, __LINE__, m_frameCount, m_frameDropCount);
     }

     m_vsyncTime = 0;
     m_frameCount = 0;
     m_frameDropCount = 0;

     m_videoSyncPeriod = (nsecs_t)(1e9 / targetFps + 0.5);
     m_frameScheduleMode = mode;
     m_enableSkip = skip;
     m_frameDurationUs = m_videoSyncPeriod / 1000;

     if (m_frameDurationUs > FRAME_DURATION_OFFSET_US) {
         m_frameDurationUs -= FRAME_DURATION_OFFSET_US;
     }

     if(mode == FRAME_SCHEDULE_MODE_SCHEDULE) {
         m_updateVsync();
         ALOGD("(%s[%d] m_vsyncPeriod=%lld", __FUNCTION__, __LINE__, m_vsyncPeriod);
     }

     ALOGD("(%s[%d] targetFps=%f, videoSyncPeriod=%lld, frameScheduleMode=%d, enableSkip=%d, frameDurationUs=%lld)",
          __FUNCTION__, __LINE__, targetFps, m_videoSyncPeriod, m_frameScheduleMode, m_enableSkip, m_frameDurationUs);
 }

 void SecCameraPreviewFrameScheduler::m_updateVsync()
 {
     Mutex::Autolock lock(m_updateVsyncLock);
     m_vsyncPeriod = 0;
     m_vsyncTimeOld = m_vsyncTime;
     m_vsyncTime = 0;

     // For now, surface flinger only schedules frames on the primary display
     if (m_composer == NULL) {
         String16 name("SurfaceFlinger");
         sp<IServiceManager> sm = defaultServiceManager();
         m_composer = interface_cast<ISurfaceComposer>(sm->checkService(name));
     }

     if (m_composer != NULL) {
         DisplayStatInfo stats;
         status_t res = m_composer->getDisplayStats(NULL /* display */, &stats);
         if (res == OK) {
             ALOGV("vsync time:%lld period:%lld",
                     (long long)stats.vsyncTime, (long long)stats.vsyncPeriod);
             m_vsyncTime = stats.vsyncTime;
             m_vsyncPeriod = stats.vsyncPeriod;
         } else {
             ALOGW("getDisplayStats returned %d", res);
         }
     } else {
         ALOGW("could not get surface m_composer service");
     }
 }

 nsecs_t SecCameraPreviewFrameScheduler::m_schedule()
 {
     nsecs_t curTime = systemTime(SYSTEM_TIME_MONOTONIC);
     nsecs_t delayTime = 0;

     m_updateVsync();

     // without VSYNC info, there is nothing to do
     if (m_vsyncPeriod == 0) {
         ALOGE("no vsync: render=%lld", (long long)curTime);
         goto func_exit;
     }

     if (m_vsyncTime < m_vsyncTimeOld) {
         ALOGE("Invalid vsync time m_vsyncTime(%lld) < m_vsyncTimeOld(%lld)", m_vsyncTime, m_vsyncTimeOld);
         goto func_exit;
     }

     if (m_vsyncTime < curTime) {
         ALOGE("Vsync is older than now : m_vsyncTime(%lld), curTime(%lld)", m_vsyncTime, curTime);
         goto func_exit;
     }

     if (m_vsyncTime - m_vsyncTimeOld > m_videoSyncPeriod*3/2 + MULTIPLE_VSYNC_DETECT_OFFSET_NS) {
         ALOGV("Multiple vsyncs have been triggered: %lld, %lld", m_vsyncTimeOld, m_vsyncTime);
         goto func_exit;
     }

     if (m_videoSyncPeriod > m_vsyncPeriod) {
         delayTime = (m_vsyncTime - curTime + (m_videoSyncPeriod - m_vsyncPeriod) + FRAME_SCHEDULE_OFFSET_NS) % m_videoSyncPeriod;
     } else {
         delayTime = (m_vsyncTime - curTime + FRAME_SCHEDULE_OFFSET_NS) % m_videoSyncPeriod;
     }

 func_exit:

     ALOGV("schedule() VsyncOld(%lld), Vsync(%lld), cur(%lld), VsyncPeriod(%lld), VideoPeriod(%lld), Delay(%lld), target(%lld)",
             m_vsyncTimeOld, m_vsyncTime, curTime, m_vsyncPeriod, m_videoSyncPeriod, delayTime, curTime+delayTime);

     return delayTime;
 }

 void SecCameraPreviewFrameScheduler::m_run()
 {
     ALOGD("(%s[%d])", __FUNCTION__, __LINE__);

     m_flagThreadStop = false;
     m_scheduler->run();
 }

 void SecCameraPreviewFrameScheduler::m_stop()
 {
     ALOGD("(%s[%d])", __FUNCTION__, __LINE__);

     m_flagThreadStop = true;
     m_scheduler->stop();
     m_previewFrameQ.sendCmd(WAKE_UP);
     m_scheduler->requestExitAndWait();
     m_clearList(&m_previewFrameQ);
 }

 void SecCameraPreviewFrameScheduler::m_release()
 {
     ALOGD("(%s[%d])", __FUNCTION__, __LINE__);

     m_composer.clear();
     m_previewFrameQ.release();
 }

 status_t SecCameraPreviewFrameScheduler::m_pushProcessQ(ExynosCameraFrame ** frame)
 {
     status_t ret = NO_ERROR;
     m_previewFrameQ.pushProcessQ(frame);

     return ret;
 }

 status_t SecCameraPreviewFrameScheduler::m_clearList(frame_queue_t *queue)
 {
     ExynosCameraFrame *curFrame = NULL;

     if(queue->getSizeOfProcessQ() == 0) {
         return NO_ERROR;
     }

     ALOGD("DEBUG(%s):remaining frame(%d), we remove them all", __FUNCTION__, queue->getSizeOfProcessQ());

     while (0 < queue->getSizeOfProcessQ()) {
         queue->popProcessQ(&curFrame);
         if (curFrame != NULL) {
             ALOGV("DEBUG(%s):remove frame count %d", __FUNCTION__, curFrame->getFrameCount() );
             curFrame->decRef();
             m_frameMgr->deleteFrame(curFrame);
             curFrame = NULL;
         }
     }
     ALOGD("DEBUG(%s):EXIT ", __FUNCTION__);

     return NO_ERROR;
 }

 bool SecCameraPreviewFrameScheduler::m_schedulerThreadFunc(void)
 {
     int ret = 0;
     ExynosCameraBuffer buffer;
     uint64_t delayUs = 0;
     int qnum = 0;
     uint32_t offset = FRAME_DURATION_OFFSET_US;
     ExynosCameraFrame* frame = NULL;

     /* Wait and pop preview frame */
     ret = m_previewFrameQ.waitAndPopProcessQ(&frame);
     if (m_flagThreadStop == true) {
         ALOGD("INFO(%s[%d]):m_flagThreadStop(%d)", __FUNCTION__, __LINE__, m_flagThreadStop);
         goto func_exit;
     }
     if (ret < 0) {
         ALOGW("WARN(%s[%d]):wait and pop fail, ret(%d)", __FUNCTION__, __LINE__, ret);
         goto func_exit;
     }

     /* Get destBuffer form frame */
     ret = frame->getDstBuffer(PIPE_SCP, &buffer);
     if (ret < 0) {
         ALOGE("ERR(%s[%d]):getDstBuffer fail, ret(%d)", __FUNCTION__, __LINE__, ret);
         goto func_exit;
     }

     ALOGV("(%s[%d])index:%d", __FUNCTION__, __LINE__, buffer.index);

     qnum = m_previewFrameQ.getSizeOfProcessQ();

     /* Do skip frame by stacked qnum  */
     if ((m_enableSkip == true) && (qnum >= 1)) {
         m_frameDropCount++;
         ALOGD("(%s[%d])skip frame Qnum=%d", __FUNCTION__, __LINE__, qnum);
         frame->setFrameState(FRAME_STATE_SKIPPED);
         if (m_scpBufferMgr != NULL) {
             ret = m_scpBufferMgr->cancelBuffer(buffer.index, true);
             if (ret < 0) {
                 ALOGE("ERR(%s[%d]):cancelBuffer fail, ret(%d)", __FUNCTION__, __LINE__, ret);

             }
         }
         goto func_exit;
     }

     m_frameCount++;

     /* Do frame scheduling */
     if (m_frameScheduleMode == FRAME_SCHEDULE_MODE_SCHEDULE) {
         if ((m_enableSkip == false) && (qnum >= 1)) {
             m_frameDropCount++;
             ALOGD("(%s[%d])overwrite frame Qnum=%d", __FUNCTION__, __LINE__, qnum);
         } else {
             delayUs = m_schedule() / 1000;
         }
     } else if (m_frameScheduleMode == FRAME_SCHEDULE_MODE_DURATION) {
         m_previewDurationTimer.stop();
         m_previewDurationTime = m_previewDurationTimer.durationUsecs();
         if (qnum == 1) {
             if (m_frameDurationUs > offset) {
                 m_frameDurationUs -= offset;
             }
         } else if (qnum >= 2) {
             if (m_frameDurationUs > offset*2) {
                 m_frameDurationUs -= offset*2;
             }
         }
         if (m_frameDurationUs > m_previewDurationTime) {
             delayUs = m_frameDurationUs - m_previewDurationTime;
         }
     }

     /* Delay frame using delayUs value */
     if (delayUs > 0) {
         ALOGV("(%s[%d])m_frameScheduleMode=%d delayUs=%lld", __FUNCTION__, __LINE__,
             m_frameScheduleMode, delayUs);
         usleep(delayUs);
     }

     if(m_frameScheduleMode == FRAME_SCHEDULE_MODE_DURATION) {
         m_previewDurationTimer.start();
     }

     /* Set time stamp */
     if (m_previewWindow != NULL) {
         int64_t timeStamp = (int64_t)frame->getTimeStamp();

         if (timeStamp > 0L) {
             m_previewWindow->set_timestamp(m_previewWindow, timeStamp);
         } else {
             uint32_t fcount = 0;
             int frameCount = frame->getFrameCount();
             getStreamFrameCount((struct camera2_stream *)buffer.addr[2], &fcount);
             ALOGW("WRN(%s[%d]): frameCount(%d)(%d), Invalid timeStamp(%lld)",
                 __FUNCTION__, __LINE__,
                 frameCount,
                 fcount,
                 timeStamp);
         }
     }

 #ifdef PREVIEW_DURATION_DEBUG
     m_previewDurationDebugTimer.stop();
     ALOGW("(%s):PreviewDelay Time(%lld), Qnum(%d)", __FUNCTION__,
         m_previewDurationDebugTimer.durationUsecs(), m_previewFrameQ.getSizeOfProcessQ());
     m_previewDurationDebugTimer.start();
 #endif

     /* putBuffer to surface */
     if (m_scpBufferMgr != NULL) {
         m_scpBufferMgr->putBuffer(buffer.index, EXYNOS_CAMERA_BUFFER_POSITION_NONE);
     }

 func_exit:

     if (frame != NULL) {
         frame->decRef();
         m_frameMgr->deleteFrame(frame);
         frame = NULL;
     }

     return true;
 }

 SecCameraPreviewFrameScheduler::~SecCameraPreviewFrameScheduler()
 {
     m_release();
 }

 } // namespace android
	/*
	* Copyright (C) 2014 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.
	*/

	//#define LOG_NDEBUG 0
	#define LOG_TAG "SecCameraPreviewFrameScheduler"
	#include <utils/Log.h>
	#include <utils/Trace.h>

	#include <sys/time.h>

	#include <binder/IServiceManager.h>
	#include <gui/ISurfaceComposer.h>
	#include <ui/DisplayStatInfo.h>

	#include "SecCameraPreviewFrameScheduler.h"

	namespace android {

	SecCameraPreviewFrameScheduler::SecCameraPreviewFrameScheduler()
	: m_vsyncTime(0),
	m_vsyncPeriod(0),
	m_frameCount(0),
	m_frameDropCount(0),
	m_frameScheduleMode(FRAME_SCHEDULE_MODE_OFF),
	m_enableSkip(false),
	m_scpBufferMgr(NULL),
	m_previewWindow(NULL),
	m_frameMgr(NULL)
	{
	ALOGV("(%s[%d])", __FUNCTION__, __LINE__);
	}

	void SecCameraPreviewFrameScheduler::m_init()
	{
	ALOGD("(%s[%d]", __FUNCTION__, __LINE__);

	m_reset(FRAME_SCHEDULE_MODE_OFF, 30, true);
	m_previewFrameQ.setWaitTime(2000000000);

	m_scheduler = new m_schedulerThread(this,
	&SecCameraPreviewFrameScheduler::m_schedulerThreadFunc,
	"PreviewFrameScheduler", PRIORITY_DISPLAY);
	}

	void SecCameraPreviewFrameScheduler::m_setHandles(ExynosCameraBufferManager *scpBufferMgr,
	preview_stream_ops previewWindow, ExynosCameraFrameManager frameMgr)
	{
	ALOGD("(%s[%d]", __FUNCTION__, __LINE__);

	m_scpBufferMgr = scpBufferMgr;
	m_previewWindow = previewWindow;
	m_frameMgr = frameMgr;
	}

	void SecCameraPreviewFrameScheduler::m_reset(frame_schedule_mode_t mode, float targetFps, bool skip)
	{
	if(m_frameCount > 240) {
	ALOGD("(%s[%d]) m_frameCount=%lld, m_frameDropCount=%lld", __FUNCTION__, __LINE__, m_frameCount, m_frameDropCount);
	}

	m_vsyncTime = 0;
	m_frameCount = 0;
	m_frameDropCount = 0;

	m_videoSyncPeriod = (nsecs_t)(1e9 / targetFps + 0.5);
	m_frameScheduleMode = mode;
	m_enableSkip = skip;
	m_frameDurationUs = m_videoSyncPeriod / 1000;

	if (m_frameDurationUs > FRAME_DURATION_OFFSET_US) {
	m_frameDurationUs -= FRAME_DURATION_OFFSET_US;
	}

	if(mode == FRAME_SCHEDULE_MODE_SCHEDULE) {
	m_updateVsync();
	ALOGD("(%s[%d] m_vsyncPeriod=%lld", __FUNCTION__, __LINE__, m_vsyncPeriod);
	}

	ALOGD("(%s[%d] targetFps=%f, videoSyncPeriod=%lld, frameScheduleMode=%d, enableSkip=%d, frameDurationUs=%lld)",
	__FUNCTION__, __LINE__, targetFps, m_videoSyncPeriod, m_frameScheduleMode, m_enableSkip, m_frameDurationUs);
	}

	void SecCameraPreviewFrameScheduler::m_updateVsync()
	{
	Mutex::Autolock lock(m_updateVsyncLock);
	m_vsyncPeriod = 0;
	m_vsyncTimeOld = m_vsyncTime;
	m_vsyncTime = 0;

	// For now, surface flinger only schedules frames on the primary display
	if (m_composer == NULL) {
	String16 name("SurfaceFlinger");
	sp<IServiceManager> sm = defaultServiceManager();
	m_composer = interface_cast<ISurfaceComposer>(sm->checkService(name));
	}

	if (m_composer != NULL) {
	DisplayStatInfo stats;
	status_t res = m_composer->getDisplayStats(NULL /* display */, &stats);
	if (res == OK) {
	ALOGV("vsync time:%lld period:%lld",
	(long long)stats.vsyncTime, (long long)stats.vsyncPeriod);
	m_vsyncTime = stats.vsyncTime;
	m_vsyncPeriod = stats.vsyncPeriod;
	} else {
	ALOGW("getDisplayStats returned %d", res);
	}
	} else {
	ALOGW("could not get surface m_composer service");
	}
	}

	nsecs_t SecCameraPreviewFrameScheduler::m_schedule()
	{
	nsecs_t curTime = systemTime(SYSTEM_TIME_MONOTONIC);
	nsecs_t delayTime = 0;

	m_updateVsync();

	// without VSYNC info, there is nothing to do
	if (m_vsyncPeriod == 0) {
	ALOGE("no vsync: render=%lld", (long long)curTime);
	goto func_exit;
	}

	if (m_vsyncTime < m_vsyncTimeOld) {
	ALOGE("Invalid vsync time m_vsyncTime(%lld) < m_vsyncTimeOld(%lld)", m_vsyncTime, m_vsyncTimeOld);
	goto func_exit;
	}

	if (m_vsyncTime < curTime) {
	ALOGE("Vsync is older than now : m_vsyncTime(%lld), curTime(%lld)", m_vsyncTime, curTime);
	goto func_exit;
	}

	if (m_vsyncTime - m_vsyncTimeOld > m_videoSyncPeriod*3/2 + MULTIPLE_VSYNC_DETECT_OFFSET_NS) {
	ALOGV("Multiple vsyncs have been triggered: %lld, %lld", m_vsyncTimeOld, m_vsyncTime);
	goto func_exit;
	}

	if (m_videoSyncPeriod > m_vsyncPeriod) {
	delayTime = (m_vsyncTime - curTime + (m_videoSyncPeriod - m_vsyncPeriod) + FRAME_SCHEDULE_OFFSET_NS) % m_videoSyncPeriod;
	} else {
	delayTime = (m_vsyncTime - curTime + FRAME_SCHEDULE_OFFSET_NS) % m_videoSyncPeriod;
	}

	func_exit:

	ALOGV("schedule() VsyncOld(%lld), Vsync(%lld), cur(%lld), VsyncPeriod(%lld), VideoPeriod(%lld), Delay(%lld), target(%lld)",
	m_vsyncTimeOld, m_vsyncTime, curTime, m_vsyncPeriod, m_videoSyncPeriod, delayTime, curTime+delayTime);

	return delayTime;
	}

	void SecCameraPreviewFrameScheduler::m_run()
	{
	ALOGD("(%s[%d])", __FUNCTION__, __LINE__);

	m_flagThreadStop = false;
	m_scheduler->run();
	}

	void SecCameraPreviewFrameScheduler::m_stop()
	{
	ALOGD("(%s[%d])", __FUNCTION__, __LINE__);

	m_flagThreadStop = true;
	m_scheduler->stop();
	m_previewFrameQ.sendCmd(WAKE_UP);
	m_scheduler->requestExitAndWait();
	m_clearList(&m_previewFrameQ);
	}

	void SecCameraPreviewFrameScheduler::m_release()
	{
	ALOGD("(%s[%d])", __FUNCTION__, __LINE__);

	m_composer.clear();
	m_previewFrameQ.release();
	}

	status_t SecCameraPreviewFrameScheduler::m_pushProcessQ(ExynosCameraFrame ** frame)
	{
	status_t ret = NO_ERROR;
	m_previewFrameQ.pushProcessQ(frame);

	return ret;
	}

	status_t SecCameraPreviewFrameScheduler::m_clearList(frame_queue_t *queue)
	{
	ExynosCameraFrame *curFrame = NULL;

	if(queue->getSizeOfProcessQ() == 0) {
	return NO_ERROR;
	}

	ALOGD("DEBUG(%s):remaining frame(%d), we remove them all", __FUNCTION__, queue->getSizeOfProcessQ());

	while (0 < queue->getSizeOfProcessQ()) {
	queue->popProcessQ(&curFrame);
	if (curFrame != NULL) {
	ALOGV("DEBUG(%s):remove frame count %d", __FUNCTION__, curFrame->getFrameCount() );
	curFrame->decRef();
	m_frameMgr->deleteFrame(curFrame);
	curFrame = NULL;
	}
	}
	ALOGD("DEBUG(%s):EXIT ", __FUNCTION__);

	return NO_ERROR;
	}

	bool SecCameraPreviewFrameScheduler::m_schedulerThreadFunc(void)
	{
	int ret = 0;
	ExynosCameraBuffer buffer;
	uint64_t delayUs = 0;
	int qnum = 0;
	uint32_t offset = FRAME_DURATION_OFFSET_US;
	ExynosCameraFrame* frame = NULL;

	/* Wait and pop preview frame */
	ret = m_previewFrameQ.waitAndPopProcessQ(&frame);
	if (m_flagThreadStop == true) {
	ALOGD("INFO(%s[%d]):m_flagThreadStop(%d)", __FUNCTION__, __LINE__, m_flagThreadStop);
	goto func_exit;
	}
	if (ret < 0) {
	ALOGW("WARN(%s[%d]):wait and pop fail, ret(%d)", __FUNCTION__, __LINE__, ret);
	goto func_exit;
	}

	/* Get destBuffer form frame */
	ret = frame->getDstBuffer(PIPE_SCP, &buffer);
	if (ret < 0) {
	ALOGE("ERR(%s[%d]):getDstBuffer fail, ret(%d)", __FUNCTION__, __LINE__, ret);
	goto func_exit;
	}

	ALOGV("(%s[%d])index:%d", __FUNCTION__, __LINE__, buffer.index);

	qnum = m_previewFrameQ.getSizeOfProcessQ();

	/* Do skip frame by stacked qnum */
	if ((m_enableSkip == true) && (qnum >= 1)) {
	m_frameDropCount++;
	ALOGD("(%s[%d])skip frame Qnum=%d", __FUNCTION__, __LINE__, qnum);
	frame->setFrameState(FRAME_STATE_SKIPPED);
	if (m_scpBufferMgr != NULL) {
	ret = m_scpBufferMgr->cancelBuffer(buffer.index, true);
	if (ret < 0) {
	ALOGE("ERR(%s[%d]):cancelBuffer fail, ret(%d)", __FUNCTION__, __LINE__, ret);

	}
	}
	goto func_exit;
	}

	m_frameCount++;

	/* Do frame scheduling */
	if (m_frameScheduleMode == FRAME_SCHEDULE_MODE_SCHEDULE) {
	if ((m_enableSkip == false) && (qnum >= 1)) {
	m_frameDropCount++;
	ALOGD("(%s[%d])overwrite frame Qnum=%d", __FUNCTION__, __LINE__, qnum);
	} else {
	delayUs = m_schedule() / 1000;
	}
	} else if (m_frameScheduleMode == FRAME_SCHEDULE_MODE_DURATION) {
	m_previewDurationTimer.stop();
	m_previewDurationTime = m_previewDurationTimer.durationUsecs();
	if (qnum == 1) {
	if (m_frameDurationUs > offset) {
	m_frameDurationUs -= offset;
	}
	} else if (qnum >= 2) {
	if (m_frameDurationUs > offset*2) {
	m_frameDurationUs -= offset*2;
	}
	}
	if (m_frameDurationUs > m_previewDurationTime) {
	delayUs = m_frameDurationUs - m_previewDurationTime;
	}
	}

	/* Delay frame using delayUs value */
	if (delayUs > 0) {
	ALOGV("(%s[%d])m_frameScheduleMode=%d delayUs=%lld", __FUNCTION__, __LINE__,
	m_frameScheduleMode, delayUs);
	usleep(delayUs);
	}

	if(m_frameScheduleMode == FRAME_SCHEDULE_MODE_DURATION) {
	m_previewDurationTimer.start();
	}

	/* Set time stamp */
	if (m_previewWindow != NULL) {
	int64_t timeStamp = (int64_t)frame->getTimeStamp();

	if (timeStamp > 0L) {
	m_previewWindow->set_timestamp(m_previewWindow, timeStamp);
	} else {
	uint32_t fcount = 0;
	int frameCount = frame->getFrameCount();
	getStreamFrameCount((struct camera2_stream *)buffer.addr[2], &fcount);
	ALOGW("WRN(%s[%d]): frameCount(%d)(%d), Invalid timeStamp(%lld)",
	__FUNCTION__, __LINE__,
	frameCount,
	fcount,
	timeStamp);
	}
	}

	#ifdef PREVIEW_DURATION_DEBUG
	m_previewDurationDebugTimer.stop();
	ALOGW("(%s):PreviewDelay Time(%lld), Qnum(%d)", __FUNCTION__,
	m_previewDurationDebugTimer.durationUsecs(), m_previewFrameQ.getSizeOfProcessQ());
	m_previewDurationDebugTimer.start();
	#endif

	/* putBuffer to surface */
	if (m_scpBufferMgr != NULL) {
	m_scpBufferMgr->putBuffer(buffer.index, EXYNOS_CAMERA_BUFFER_POSITION_NONE);
	}

	func_exit:

	if (frame != NULL) {
	frame->decRef();
	m_frameMgr->deleteFrame(frame);
	frame = NULL;
	}

	return true;
	}

	SecCameraPreviewFrameScheduler::~SecCameraPreviewFrameScheduler()
	{
	m_release();
	}

	} // namespace android