Compensate phase

1 files changed, 9 insertions, 2 deletions

diff --git a/PCM.cpp b/PCM.cpp
index 218ba59..8c0e01f 100644
--- a/PCM.cpp
+++ b/PCM.cpp
@@ -59,13 +59,20 @@ PCM::~PCM()
   free(pfd);
 }
 
-void PCM::click(int64_t offset_us)
+// offset > 0: play earlier
+// offset < 0: play later
+void PCM::click(std::chrono::duration<double> offset)
 {
   snd_pcm_sframes_t delay;
   if (0 > snd_pcm_delay(handle, &delay)) {
   }
 
-  m_phase = - click_latency_frames + delay + offset_us;
+  int64_t offset_frames{static_cast<int64_t>(offset.count() * f_sample)};
+  m_phase = - click_latency_frames + delay + offset_frames;
+
+  if (m_phase > 0) {
+    log_cout << fmt::format("phase = {}", m_phase) << std::endl;
+  }
 }
 
 // generate 1 buffer size