Pass delay and timestamp to AudioSourceCallback::OnMoreData.

media/audio/audio_output_stream_sink.cc

Index: media/audio/audio_output_stream_sink.cc
diff --git a/media/audio/audio_output_stream_sink.cc b/media/audio/audio_output_stream_sink.cc
index b94e2d265847d33f2a93cab9dc3e8a90a7cbd140..0a107e94bd3314325e266044619441ef9cd0ea29 100644
--- a/media/audio/audio_output_stream_sink.cc
+++ b/media/audio/audio_output_stream_sink.cc
@@ -4,6 +4,7 @@
 
 #include "media/audio/audio_output_stream_sink.h"
 
+#include <algorithm>
 #include <cmath>
 
 #include "base/bind.h"
@@ -82,18 +83,20 @@ bool AudioOutputStreamSink::CurrentThreadIsRenderingThread() {
   return false;
 }
 
-int AudioOutputStreamSink::OnMoreData(AudioBus* dest,
-                                      uint32_t total_bytes_delay,
-                                      uint32_t frames_skipped) {
+int AudioOutputStreamSink::OnMoreData(base::TimeTicks target_playout_time,
+                                      int prior_frames_skipped,
+                                      AudioBus* dest) {
   // Note: Runs on the audio thread created by the OS.
   base::AutoLock al(callback_lock_);
   if (!active_render_callback_)
     return 0;
 
-  uint32_t frames_delayed = std::round(static_cast<double>(total_bytes_delay) /
-                                       active_params_.GetBytesPerFrame());
+  base::TimeDelta delay =
+      std::max(target_playout_time - base::TimeTicks::Now(), base::TimeDelta());
+  uint32_t frames_delayed = delay.InSeconds() * active_params_.sample_rate();

[miu, 2016/08/31 23:26:54]

s/InSeconds/InSecondsF/ to prevent serious loss of precision!

[James West, 2016/09/13 07:40:50]

Done.

 
-  return active_render_callback_->Render(dest, frames_delayed, frames_skipped);
+  return active_render_callback_->Render(dest, frames_delayed,
+                                         prior_frames_skipped);
 }
 
 void AudioOutputStreamSink::OnError(AudioOutputStream* stream) {
@@ -154,4 +157,4 @@ void AudioOutputStreamSink::ClearCallback() {
   active_render_callback_ = NULL;
 }
 
-}  // namepace media
+}  // namespace media