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Bug 978239 - Synchronize WindowsRealTimeClock to unmess RTCP timestamps. r=jesup

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Jan-Ivar Bruaroey 2014-02-28 15:42:24 -05:00
parent 66f56aca38
commit 3e1fbd44bc
1 changed files with 16 additions and 2 deletions
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16
media/webrtc/trunk/webrtc/system_wrappers/source/clock.cc
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@ -233,12 +233,26 @@ class UnixRealTimeClock : public RealTimeClock {
// Keeps the global state for the Windows implementation of RtpRtcpClock.
// Note that this is a POD. Only PODs are allowed to have static storage
// duration according to the Google Style guide.
//
// Note that on Windows, GetSystemTimeAsFileTime has poorer (up to 15 ms)
// resolution than the media timers, hence the WindowsHelpTimer context
// object and Synchronize API.
//
// We only sync up once, which means that on Windows, our realtime clock
// wont respond to system time/date changes without a program restart.
// TODO: We could attempt to detect 1+ minute jumps and resync for parity
// with other platforms.
static WindowsHelpTimer *SyncGlobalHelpTimer() {
static WindowsHelpTimer global_help_timer = {0, 0, {{ 0, 0}, 0}, 0};
Synchronize(&global_help_timer);
return &global_help_timer;
}
#endif
Clock* Clock::GetRealTimeClock() {
#if defined(_WIN32)
static WindowsRealTimeClock clock(&global_help_timer);
static WindowsRealTimeClock clock(SyncGlobalHelpTimer());
return &clock;
#elif ((defined WEBRTC_LINUX) || (defined WEBRTC_BSD) || (defined WEBRTC_MAC))
static UnixRealTimeClock clock;