From 52f8c8b7c4f0b6fba3bce9c495073100546f8d9a Mon Sep 17 00:00:00 2001
From: Paul Adenot <paul@paul.cx>
Date: Mon, 16 Sep 2013 03:26:04 -0400
Subject: [PATCH] Bug 904617: Part 2 - Expose Audio Stream Latency
 r=padenot,jesup

---
 content/media/AudioStream.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/content/media/AudioStream.cpp b/content/media/AudioStream.cpp
index 3a3c6e73549..67a16d8a97f 100644
--- a/content/media/AudioStream.cpp
+++ b/content/media/AudioStream.cpp
@@ -322,6 +322,7 @@ class BufferedAudioStream : public AudioStream
   int64_t GetPosition();
   int64_t GetPositionInFrames();
   int64_t GetPositionInFramesInternal();
+  int64_t GetLatencyInFrames();
   bool IsPaused();
   // This method acquires the monitor and forward the call to the base
   // class, to prevent a race on |mTimeStretcher|, in
@@ -775,6 +776,17 @@ BufferedAudioStream::GetPositionInFramesUnlocked()
   return std::min<uint64_t>(adjustedPosition, INT64_MAX);
 }
 
+int64_t
+BufferedAudioStream::GetLatencyInFrames()
+{
+  uint32_t latency;
+  if(cubeb_stream_get_latency(mCubebStream, &latency)) {
+    NS_WARNING("Could not get cubeb latency.");
+    return 0;
+  }
+  return static_cast<int64_t>(latency);
+}
+
 bool
 BufferedAudioStream::IsPaused()
 {