2 * Copyright (c) 2014 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"
21 #include <dali/integration-api/core.h>
22 #include <dali/integration-api/platform-abstraction.h>
25 #include <base/interfaces/adaptor-internal-services.h>
26 #include <base/update-render-synchronization.h>
27 #include <base/environment-options.h>
41 const unsigned int MICROSECONDS_PER_SECOND( 1000000u );
42 const unsigned int TIME_PER_FRAME_IN_MICROSECONDS( 16667u );
44 #if defined(DEBUG_ENABLED)
45 Integration::Log::Filter* gSyncLogFilter = Integration::Log::Filter::New(Debug::NoLogging, false, "LOG_VSYNC_NOTIFIER");
48 } // unnamed namespace
50 VSyncNotifier::VSyncNotifier( UpdateRenderSynchronization& sync,
51 AdaptorInternalServices& adaptorInterfaces,
52 const EnvironmentOptions& environmentOptions )
53 : mUpdateRenderSync( sync ),
54 mCore( adaptorInterfaces.GetCore() ),
55 mPlatformAbstraction( adaptorInterfaces.GetPlatformAbstractionInterface() ),
56 mVSyncMonitor( adaptorInterfaces.GetVSyncMonitorInterface() ),
58 mEnvironmentOptions( environmentOptions ),
59 mNumberOfVSyncsPerRender(1)
63 VSyncNotifier::~VSyncNotifier()
65 DALI_LOG_INFO( gSyncLogFilter, Debug::General, "%s\n", __func__ );
70 void VSyncNotifier::Start()
72 DALI_LOG_INFO( gSyncLogFilter, Debug::General, "%s\n", __func__ );
76 mVSyncMonitor->Initialize();
78 mThread = new pthread_t();
79 int error = pthread_create( mThread, NULL, InternalThreadEntryFunc, this );
80 DALI_ASSERT_ALWAYS( !error && "Return code from pthread_create() in VSyncNotifier" );
84 void VSyncNotifier::Stop()
86 DALI_LOG_INFO( gSyncLogFilter, Debug::General, "%s\n", __func__ );
90 // wait for the thread to finish
91 pthread_join(*mThread, NULL);
97 mVSyncMonitor->Terminate();
100 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
101 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
102 // The following is executed inside the notifier thread !!!
103 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
104 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
106 void VSyncNotifier::Run()
108 // install a function for logging
109 mEnvironmentOptions.InstallLogFunction();
111 unsigned int frameNumber( 0u ); // frameCount, updated when the thread is paused
112 unsigned int currentSequenceNumber( 0u ); // platform specific vsync sequence number (increments with each vsync)
113 unsigned int currentSeconds( 0u ); // timestamp at latest sync
114 unsigned int currentMicroseconds( 0u ); // timestamp at latest sync
115 unsigned int seconds( 0u );
116 unsigned int microseconds( 0u );
118 bool running( true );
121 DALI_LOG_INFO( gSyncLogFilter, Debug::General, "VSyncNotifier::Run. 1 Start loop \n");
123 bool validSync( true );
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 );
166 DALI_LOG_INFO( gSyncLogFilter, Debug::General, "VSyncNotifier::Run. 3 SyncWithUpdateAndRender(frame#:%d, current Sec:%u current uSec:%u)\n", frameNumber+1, currentSeconds, currentMicroseconds);
168 running = mUpdateRenderSync.VSyncNotifierSyncWithUpdateAndRender( validSync, ++frameNumber, currentSeconds, currentMicroseconds, mNumberOfVSyncsPerRender );
169 // The number of vsyncs per render may have been modified by this call.
172 // uninstall a function for logging
173 mEnvironmentOptions.UnInstallLogFunction();
177 } // namespace Adaptor
179 } // namespace Internal