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/separate-update-render/thread-synchronization.h>
29 #include <base/environment-options.h>
43 const unsigned int NANOSECONDS_PER_MICROSECOND( 1000u );
44 const unsigned int MICROSECONDS_PER_SECOND( 1000000u );
45 const unsigned int TIME_PER_FRAME_IN_MICROSECONDS( 16667u );
47 #if defined(DEBUG_ENABLED)
48 Integration::Log::Filter* gSyncLogFilter = Integration::Log::Filter::New(Debug::NoLogging, false, "LOG_VSYNC_NOTIFIER");
51 } // unnamed namespace
53 VSyncNotifier::VSyncNotifier( ThreadSynchronization& sync,
54 AdaptorInternalServices& adaptorInterfaces,
55 const EnvironmentOptions& environmentOptions )
56 : mThreadSynchronization( sync ),
57 mCore( adaptorInterfaces.GetCore() ),
58 mPlatformAbstraction( adaptorInterfaces.GetPlatformAbstractionInterface() ),
59 mVSyncMonitor( adaptorInterfaces.GetVSyncMonitorInterface() ),
61 mEnvironmentOptions( environmentOptions ),
62 mNumberOfVSyncsPerRender(1)
66 VSyncNotifier::~VSyncNotifier()
68 DALI_LOG_INFO( gSyncLogFilter, Debug::General, "%s\n", __func__ );
73 void VSyncNotifier::Start()
75 DALI_LOG_INFO( gSyncLogFilter, Debug::General, "%s\n", __func__ );
79 mVSyncMonitor->Initialize();
81 mThread = new pthread_t();
82 int error = pthread_create( mThread, NULL, InternalThreadEntryFunc, this );
83 DALI_ASSERT_ALWAYS( !error && "Return code from pthread_create() in VSyncNotifier" );
87 void VSyncNotifier::Stop()
89 DALI_LOG_INFO( gSyncLogFilter, Debug::General, "%s\n", __func__ );
93 // wait for the thread to finish
94 pthread_join(*mThread, NULL);
100 mVSyncMonitor->Terminate();
103 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
104 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
105 // The following is executed inside the notifier thread !!!
106 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
107 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
109 void VSyncNotifier::Run()
111 // install a function for logging
112 mEnvironmentOptions.InstallLogFunction();
114 unsigned int frameNumber( 0u ); // frameCount, updated when the thread is paused
115 unsigned int currentSequenceNumber( 0u ); // platform specific vsync sequence number (increments with each vsync)
116 unsigned int currentSeconds( 0u ); // timestamp at latest sync
117 unsigned int currentMicroseconds( 0u ); // timestamp at latest sync
118 uint64_t seconds( 0u );
119 uint64_t microseconds( 0u );
121 bool validSync( true );
122 while( mThreadSynchronization.VSyncReady( validSync, frameNumber++, currentSeconds, currentMicroseconds, mNumberOfVSyncsPerRender ) )
124 DALI_LOG_INFO( gSyncLogFilter, Debug::General, "VSyncNotifier::Run. 1 SyncWithUpdateAndRender(frame#:%d, current Sec:%u current uSec:%u)\n", frameNumber-1, currentSeconds, currentMicroseconds);
126 // Hardware VSyncs available?
127 if( mVSyncMonitor->UseHardware() )
129 DALI_LOG_INFO( gSyncLogFilter, Debug::General, "VSyncNotifier::Run. 2 Start hardware sync (%d frames) \n", mNumberOfVSyncsPerRender);
131 for( unsigned int i=0; i<mNumberOfVSyncsPerRender; ++i )
133 // Yes..wait for N hardware VSync ticks
134 validSync = mVSyncMonitor->DoSync( currentSequenceNumber, currentSeconds, currentMicroseconds );
139 // No..use software timer
140 mPlatformAbstraction.GetTimeNanoseconds( seconds, microseconds );
141 microseconds /= NANOSECONDS_PER_MICROSECOND; // Convert to microseconds
143 unsigned int timeDelta( MICROSECONDS_PER_SECOND * (seconds - currentSeconds) );
144 if( microseconds < currentMicroseconds)
146 timeDelta += (microseconds + MICROSECONDS_PER_SECOND) - currentMicroseconds;
150 timeDelta += microseconds - currentMicroseconds;
153 currentSeconds = seconds;
154 currentMicroseconds = microseconds;
156 unsigned int sleepTimeInMicroseconds = 0;
158 if( timeDelta < TIME_PER_FRAME_IN_MICROSECONDS )
160 sleepTimeInMicroseconds = TIME_PER_FRAME_IN_MICROSECONDS - timeDelta;
162 sleepTimeInMicroseconds += mNumberOfVSyncsPerRender * TIME_PER_FRAME_IN_MICROSECONDS;
164 DALI_LOG_INFO( gSyncLogFilter, Debug::General, "VSyncNotifier::Run. 2 Start software sync (%d frames, %u microseconds) \n", mNumberOfVSyncsPerRender, sleepTimeInMicroseconds);
167 sleepTime.tv_sec = 0;
168 sleepTime.tv_nsec = sleepTimeInMicroseconds * 1000;
169 nanosleep( &sleepTime, NULL );
171 mThreadSynchronization.AddPerformanceMarker( PerformanceInterface::VSYNC );
174 // uninstall a function for logging
175 mEnvironmentOptions.UnInstallLogFunction();
179 } // namespace Adaptor
181 } // namespace Internal