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output/alsa: CopyRingToPeriodBuffer() returns bool

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This commit is contained in:
Max Kellermann 2018-04-26 10:32:03 +02:00
parent 98d76627a5
commit d301a79dcf
1 changed files with 8 additions and 3 deletions
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11
src/output/plugins/AlsaOutputPlugin.cxx
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@ -276,14 +276,17 @@ private:
*/ */
void CancelInternal() noexcept; void CancelInternal() noexcept;
void CopyRingToPeriodBuffer() noexcept { /**
* @return false if no data was moved
*/
bool CopyRingToPeriodBuffer() noexcept {
if (period_buffer.IsFull()) if (period_buffer.IsFull())
return; return false;
size_t nbytes = ring_buffer->pop(period_buffer.GetTail(), size_t nbytes = ring_buffer->pop(period_buffer.GetTail(),
period_buffer.GetSpaceBytes()); period_buffer.GetSpaceBytes());
if (nbytes == 0) if (nbytes == 0)
return; return false;
period_buffer.AppendBytes(nbytes); period_buffer.AppendBytes(nbytes);
@ -291,6 +294,8 @@ private:
/* notify the OutputThread that there is now /* notify the OutputThread that there is now
room in ring_buffer */ room in ring_buffer */
cond.signal(); cond.signal();
return true;
} }
snd_pcm_sframes_t WriteFromPeriodBuffer() noexcept { snd_pcm_sframes_t WriteFromPeriodBuffer() noexcept {