2 * Copyright (c) 2015 Samsung Electronics Co., Ltd.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 #include "vsync-notifier.h"
23 #include <dali/integration-api/core.h>
24 #include <dali/integration-api/platform-abstraction.h>
27 #include <base/interfaces/adaptor-internal-services.h>
28 #include <base/thread-synchronization.h>
29 #include <base/environment-options.h>
43 const unsigned int MICROSECONDS_PER_SECOND( 1000000u );
44 const unsigned int TIME_PER_FRAME_IN_MICROSECONDS( 16667u );
46 #if defined(DEBUG_ENABLED)
47 Integration::Log::Filter* gSyncLogFilter = Integration::Log::Filter::New(Debug::NoLogging, false, "LOG_VSYNC_NOTIFIER");
50 } // unnamed namespace
52 VSyncNotifier::VSyncNotifier( ThreadSynchronization& sync,
53 AdaptorInternalServices& adaptorInterfaces,
54 const EnvironmentOptions& environmentOptions )
55 : mThreadSynchronization( sync ),
56 mCore( adaptorInterfaces.GetCore() ),
57 mPlatformAbstraction( adaptorInterfaces.GetPlatformAbstractionInterface() ),
58 mVSyncMonitor( adaptorInterfaces.GetVSyncMonitorInterface() ),
60 mEnvironmentOptions( environmentOptions ),
61 mNumberOfVSyncsPerRender(1)
65 VSyncNotifier::~VSyncNotifier()
67 DALI_LOG_INFO( gSyncLogFilter, Debug::General, "%s\n", __func__ );
72 void VSyncNotifier::Start()
74 DALI_LOG_INFO( gSyncLogFilter, Debug::General, "%s\n", __func__ );
78 mVSyncMonitor->Initialize();
80 mThread = new pthread_t();
81 int error = pthread_create( mThread, NULL, InternalThreadEntryFunc, this );
82 DALI_ASSERT_ALWAYS( !error && "Return code from pthread_create() in VSyncNotifier" );
86 void VSyncNotifier::Stop()
88 DALI_LOG_INFO( gSyncLogFilter, Debug::General, "%s\n", __func__ );
92 // wait for the thread to finish
93 pthread_join(*mThread, NULL);
99 mVSyncMonitor->Terminate();
102 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
103 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
104 // The following is executed inside the notifier thread !!!
105 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
106 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
108 void VSyncNotifier::Run()
110 // install a function for logging
111 mEnvironmentOptions.InstallLogFunction();
113 unsigned int frameNumber( 0u ); // frameCount, updated when the thread is paused
114 unsigned int currentSequenceNumber( 0u ); // platform specific vsync sequence number (increments with each vsync)
115 unsigned int currentSeconds( 0u ); // timestamp at latest sync
116 unsigned int currentMicroseconds( 0u ); // timestamp at latest sync
117 unsigned int seconds( 0u );
118 unsigned int microseconds( 0u );
120 bool validSync( true );
121 while( mThreadSynchronization.VSyncReady( validSync, frameNumber++, currentSeconds, currentMicroseconds, mNumberOfVSyncsPerRender ) )
123 DALI_LOG_INFO( gSyncLogFilter, Debug::General, "VSyncNotifier::Run. 1 SyncWithUpdateAndRender(frame#:%d, current Sec:%u current uSec:%u)\n", frameNumber-1, currentSeconds, currentMicroseconds);
125 // Hardware VSyncs available?
126 if( mVSyncMonitor->UseHardware() )
128 DALI_LOG_INFO( gSyncLogFilter, Debug::General, "VSyncNotifier::Run. 2 Start hardware sync (%d frames) \n", mNumberOfVSyncsPerRender);
130 for( unsigned int i=0; i<mNumberOfVSyncsPerRender; ++i )
132 // Yes..wait for N hardware VSync ticks
133 validSync = mVSyncMonitor->DoSync( currentSequenceNumber, currentSeconds, currentMicroseconds );
138 // No..use software timer
139 mPlatformAbstraction.GetTimeMicroseconds( seconds, microseconds );
141 unsigned int timeDelta( MICROSECONDS_PER_SECOND * (seconds - currentSeconds) );
142 if( microseconds < currentMicroseconds)
144 timeDelta += (microseconds + MICROSECONDS_PER_SECOND) - currentMicroseconds;
148 timeDelta += microseconds - currentMicroseconds;
151 currentSeconds = seconds;
152 currentMicroseconds = microseconds;
154 unsigned int sleepTimeInMicroseconds = 0;
156 if( timeDelta < TIME_PER_FRAME_IN_MICROSECONDS )
158 sleepTimeInMicroseconds = TIME_PER_FRAME_IN_MICROSECONDS - timeDelta;
160 sleepTimeInMicroseconds += mNumberOfVSyncsPerRender * TIME_PER_FRAME_IN_MICROSECONDS;
162 DALI_LOG_INFO( gSyncLogFilter, Debug::General, "VSyncNotifier::Run. 2 Start software sync (%d frames, %u microseconds) \n", mNumberOfVSyncsPerRender, sleepTimeInMicroseconds);
163 usleep( sleepTimeInMicroseconds );
165 mThreadSynchronization.AddPerformanceMarker( PerformanceInterface::VSYNC );
168 // uninstall a function for logging
169 mEnvironmentOptions.UnInstallLogFunction();
173 } // namespace Adaptor
175 } // namespace Internal