diff options
Diffstat (limited to 'media')
| -rw-r--r-- | media/audio/linux/alsa_output.cc | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/media/audio/linux/alsa_output.cc b/media/audio/linux/alsa_output.cc index 96a2e4b..9f3498e 100644 --- a/media/audio/linux/alsa_output.cc +++ b/media/audio/linux/alsa_output.cc @@ -88,6 +88,11 @@ // busy looping. static const int kNoDataSleepMilliseconds = 10; +// According to the linux nanosleep manpage, nanosleep on linux can miss the +// deadline by up to 10ms because the kernel timeslice is 10ms. Give a 2x +// buffer to compensate for the timeslice, and any additional slowdowns. +static const int kSleepErrorMilliseconds = 20; + // Set to 0 during debugging if you want error messages due to underrun // events or other recoverable errors. #if defined(NDEBUG) @@ -500,6 +505,11 @@ void AlsaPcmOutputStream::ScheduleNextWrite(Packet* current_packet) { int next_fill_time_ms = FramesToMillis(frames_until_empty_enough, sample_rate_); + // Adjust for timer resolution issues. + if (next_fill_time_ms > kSleepErrorMilliseconds) { + next_fill_time_ms -= kSleepErrorMilliseconds; + } + // Avoid busy looping if the data source is exhausted. if (current_packet->size == 0) { next_fill_time_ms = std::max(next_fill_time_ms, kNoDataSleepMilliseconds); |