2792329531
Resolve CLANG compilation errors CRs-Fixed: 981949 Change-Id: Ibeaac796b5e5f0defae76a8ab9bd88d3d1e4c164
282 lines
12 KiB
C++
282 lines
12 KiB
C++
/* Copyright (c) 2015-2016, The Linux Foundation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of The Linux Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#define LOG_TAG "QCameraDisplay"
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// To remove
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#include <cutils/properties.h>
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// Camera dependencies
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#include "QCamera2HWI.h"
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#include "QCameraDisplay.h"
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extern "C" {
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#include "mm_camera_dbg.h"
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}
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#define CAMERA_VSYNC_WAIT_MS 33 // Used by vsync thread to wait for vsync timeout.
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#define DISPLAY_EVENT_RECEIVER_ARRAY_SIZE 1
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#define DISPLAY_DEFAULT_FPS 60
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namespace qcamera {
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/*===========================================================================
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* FUNCTION : vsyncEventReceiverCamera
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*
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* DESCRIPTION: Computes average vsync interval. Called by display
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* event handler for every vsync event.
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*
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* PARAMETERS :
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* @fd : file descriptor
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* @events : events
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* @data : pointer to user data provided during call back registration.
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*
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* RETURN : always returns 1
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*==========================================================================*/
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int QCameraDisplay::vsyncEventReceiverCamera(__unused int fd,
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__unused int events, void* data) {
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android::DisplayEventReceiver::Event buffer[DISPLAY_EVENT_RECEIVER_ARRAY_SIZE];
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QCameraDisplay* pQCameraDisplay = (QCameraDisplay *) data;
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ssize_t n;
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while ((n = pQCameraDisplay->mDisplayEventReceiver.getEvents(buffer,
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DISPLAY_EVENT_RECEIVER_ARRAY_SIZE)) > 0) {
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for (int i = 0 ; i < n ; i++) {
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if (buffer[i].header.type == DisplayEventReceiver::DISPLAY_EVENT_VSYNC) {
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pQCameraDisplay->computeAverageVsyncInterval(buffer[i].header.timestamp);
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}
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}
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}
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return 1;
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}
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/*===========================================================================
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* FUNCTION : vsyncThreadCamera
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*
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* DESCRIPTION: Thread registers a call back function for every vsync event
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* waits on the looper for the next vsync.
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*
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* PARAMETERS :
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* @data : receives vsync_info_t structure.
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*
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* RETURN : NULL.Just to fullfill the type requirement of thread function.
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*==========================================================================*/
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void* QCameraDisplay::vsyncThreadCamera(void * data)
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{
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QCameraDisplay* pQCameraDisplay = (QCameraDisplay *) data;
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android::sp<Looper> looper;
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looper = new android::Looper(false);
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status_t status = pQCameraDisplay->mDisplayEventReceiver.initCheck();
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if (status != NO_ERROR) {
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ALOGE("Initialization of DisplayEventReceiver failed with status: %d", status);
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return NULL;
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}
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looper->addFd(pQCameraDisplay->mDisplayEventReceiver.getFd(), 0, ALOOPER_EVENT_INPUT,
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QCameraDisplay::vsyncEventReceiverCamera, pQCameraDisplay);
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pQCameraDisplay->mDisplayEventReceiver.setVsyncRate(1);
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while(pQCameraDisplay->mThreadExit == 0)
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{
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looper->pollOnce(CAMERA_VSYNC_WAIT_MS);
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}
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return NULL;
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}
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/*===========================================================================
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* FUNCTION : ~QCameraDisplay
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*
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* DESCRIPTION: constructor of QCameraDisplay
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*
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* PARAMETERS : none
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*
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* RETURN : none
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*==========================================================================*/
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QCameraDisplay::QCameraDisplay()
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: mVsyncTimeStamp(0),
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mAvgVsyncInterval(0),
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mOldTimeStamp(0),
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mVsyncHistoryIndex(0),
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mAdditionalVsyncOffsetForWiggle(0),
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mThreadExit(0),
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mNum_vsync_from_vfe_isr_to_presentation_timestamp(0),
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mSet_timestamp_num_ms_prior_to_vsync(0),
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mVfe_and_mdp_freq_wiggle_filter_max_ms(0),
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mVfe_and_mdp_freq_wiggle_filter_min_ms(0)
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{
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int rc = NO_ERROR;
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memset(&mVsyncIntervalHistory, 0, sizeof(mVsyncIntervalHistory));
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rc = pthread_create(&mVsyncThreadCameraHandle, NULL, vsyncThreadCamera, (void *)this);
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if (rc == NO_ERROR) {
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char value[PROPERTY_VALUE_MAX];
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nsecs_t default_vsync_interval;
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pthread_setname_np(mVsyncThreadCameraHandle, "CAM_Vsync_Thread");
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// Read a list of properties used for tuning
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property_get("persist.camera.disp.num_vsync", value, "4");
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mNum_vsync_from_vfe_isr_to_presentation_timestamp = atoi(value);
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property_get("persist.camera.disp.ms_to_vsync", value, "2");
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mSet_timestamp_num_ms_prior_to_vsync = atoi(value);
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property_get("persist.camera.disp.filter_max", value, "2");
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mVfe_and_mdp_freq_wiggle_filter_max_ms = atoi(value);
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property_get("persist.camera.disp.filter_min", value, "4");
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mVfe_and_mdp_freq_wiggle_filter_min_ms = atoi(value);
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property_get("persist.camera.disp.fps", value, "60");
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if (atoi(value) > 0) {
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default_vsync_interval= s2ns(1) / atoi(value);
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} else {
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default_vsync_interval= s2ns(1) / DISPLAY_DEFAULT_FPS;
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}
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for (int i=0; i < CAMERA_NUM_VSYNC_INTERVAL_HISTORY; i++) {
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mVsyncIntervalHistory[i] = default_vsync_interval;
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}
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LOGD("display jitter num_vsync_from_vfe_isr_to_presentation_timestamp %u \
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set_timestamp_num_ms_prior_to_vsync %u",
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mNum_vsync_from_vfe_isr_to_presentation_timestamp,
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mSet_timestamp_num_ms_prior_to_vsync);
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LOGD("display jitter vfe_and_mdp_freq_wiggle_filter_max_ms %u \
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vfe_and_mdp_freq_wiggle_filter_min_ms %u",
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mVfe_and_mdp_freq_wiggle_filter_max_ms,
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mVfe_and_mdp_freq_wiggle_filter_min_ms);
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} else {
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mVsyncThreadCameraHandle = 0;
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}
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}
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/*===========================================================================
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* FUNCTION : ~QCameraDisplay
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*
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* DESCRIPTION: destructor of QCameraDisplay
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*
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* PARAMETERS : none
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*
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* RETURN : none
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*==========================================================================*/
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QCameraDisplay::~QCameraDisplay()
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{
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mThreadExit = 1;
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if (mVsyncThreadCameraHandle != 0) {
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pthread_join(mVsyncThreadCameraHandle, NULL);
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}
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}
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/*===========================================================================
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* FUNCTION : computeAverageVsyncInterval
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*
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* DESCRIPTION: Computes average vsync interval using current and previously
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* stored vsync data.
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*
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* PARAMETERS : current vsync time stamp
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*
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* RETURN : none
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*==========================================================================*/
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void QCameraDisplay::computeAverageVsyncInterval(nsecs_t currentVsyncTimeStamp)
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{
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nsecs_t sum;
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nsecs_t vsyncMaxOutlier;
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nsecs_t vsyncMinOutlier;
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mVsyncTimeStamp = currentVsyncTimeStamp;
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if (mOldTimeStamp) {
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// Compute average vsync interval using current and previously stored vsync data.
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// Leave the max and min vsync interval from history in computing the average.
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mVsyncIntervalHistory[mVsyncHistoryIndex] = currentVsyncTimeStamp - mOldTimeStamp;
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mVsyncHistoryIndex++;
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mVsyncHistoryIndex = mVsyncHistoryIndex % CAMERA_NUM_VSYNC_INTERVAL_HISTORY;
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sum = mVsyncIntervalHistory[0];
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vsyncMaxOutlier = mVsyncIntervalHistory[0];
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vsyncMinOutlier = mVsyncIntervalHistory[0];
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for (int j=1; j<CAMERA_NUM_VSYNC_INTERVAL_HISTORY; j++) {
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sum += mVsyncIntervalHistory[j];
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if (vsyncMaxOutlier < mVsyncIntervalHistory[j]) {
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vsyncMaxOutlier = mVsyncIntervalHistory[j];
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} else if (vsyncMinOutlier > mVsyncIntervalHistory[j]) {
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vsyncMinOutlier = mVsyncIntervalHistory[j];
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}
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}
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sum = sum - vsyncMaxOutlier - vsyncMinOutlier;
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mAvgVsyncInterval = sum / (CAMERA_NUM_VSYNC_INTERVAL_HISTORY - 2);
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}
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mOldTimeStamp = currentVsyncTimeStamp;
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}
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/*===========================================================================
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* FUNCTION : computePresentationTimeStamp
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*
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* DESCRIPTION: Computes presentation time stamp using vsync interval
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* and last vsync time stamp and few other tunable variables
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* to place the time stamp at the expected future vsync
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*
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* PARAMETERS : current frame time stamp set by VFE when buffer copy done.
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*
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* RETURN : time stamp in future or 0 in case of failure.
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*==========================================================================*/
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nsecs_t QCameraDisplay::computePresentationTimeStamp(nsecs_t frameTimeStamp)
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{
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nsecs_t moveToNextVsync;
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nsecs_t keepInCurrentVsync;
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nsecs_t timeDifference = 0;
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nsecs_t presentationTimeStamp = 0;
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int expectedVsyncOffset = 0;
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int vsyncOffset;
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if ( (mAvgVsyncInterval != 0) && (mVsyncTimeStamp != 0) ) {
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// Compute presentation time stamp in future as per the following formula
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// future time stamp = vfe time stamp + N * average vsync interval
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// Adjust the time stamp so that it is placed few milliseconds before
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// the expected vsync.
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// Adjust the time stamp for the period where vsync time stamp and VFE
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// timstamp cross over due difference in fps.
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presentationTimeStamp = frameTimeStamp +
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(mNum_vsync_from_vfe_isr_to_presentation_timestamp * mAvgVsyncInterval);
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if (presentationTimeStamp > mVsyncTimeStamp) {
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timeDifference = presentationTimeStamp - mVsyncTimeStamp;
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moveToNextVsync = mAvgVsyncInterval - mVfe_and_mdp_freq_wiggle_filter_min_ms;
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keepInCurrentVsync = mAvgVsyncInterval - mVfe_and_mdp_freq_wiggle_filter_max_ms;
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vsyncOffset = timeDifference % mAvgVsyncInterval;
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expectedVsyncOffset = mAvgVsyncInterval -
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mSet_timestamp_num_ms_prior_to_vsync - vsyncOffset;
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if (vsyncOffset > moveToNextVsync) {
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mAdditionalVsyncOffsetForWiggle = mAvgVsyncInterval;
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} else if (vsyncOffset < keepInCurrentVsync) {
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mAdditionalVsyncOffsetForWiggle = 0;
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}
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LOGD("vsyncTimeStamp: %llu presentationTimeStamp: %llu expectedVsyncOffset: %d \
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timeDifference: %llu vsyncffset: %d avgvsync: %llu \
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additionalvsyncOffsetForWiggle: %llu",
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mVsyncTimeStamp, presentationTimeStamp, expectedVsyncOffset,
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timeDifference, vsyncOffset, mAvgVsyncInterval,
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mAdditionalVsyncOffsetForWiggle);
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}
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presentationTimeStamp = presentationTimeStamp + expectedVsyncOffset +
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mAdditionalVsyncOffsetForWiggle;
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}
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return presentationTimeStamp;
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}
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}; // namespace qcamera
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