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From 0758363d982b0b3e6cf021c164715a028a345b9e Mon Sep 17 00:00:00 2001
From: "Byron Campen [:bwc]" <docfaraday@gmail.com>
Date: Wed, 21 Jan 2015 08:56:36 -0800
Subject: [PATCH] Bug 1123882 - Fix case where offset != 0. r=derf, a=bkerensa

---
 content/media/MediaDecoderStateMachine.cpp | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/content/media/MediaDecoderStateMachine.cpp b/content/media/MediaDecoderStateMachine.cpp
index ce5870f..4ed496c 100644
--- a/content/media/MediaDecoderStateMachine.cpp
+++ b/content/media/MediaDecoderStateMachine.cpp
@@ -328,6 +328,8 @@ void MediaDecoderStateMachine::SendStreamAudio(AudioData* aAudio,
   if (offset >= aAudio->mFrames)
     return;
 
+  size_t framesToWrite = aAudio->mFrames - offset;
+
   aAudio->EnsureAudioBuffer();
   nsRefPtr<SharedBuffer> buffer = aAudio->mAudioBuffer;
   AudioDataValue* bufferData = static_cast<AudioDataValue*>(buffer->Data());
@@ -335,10 +337,11 @@ void MediaDecoderStateMachine::SendStreamAudio(AudioData* aAudio,
   for (uint32_t i = 0; i < aAudio->mChannels; ++i) {
     channels.AppendElement(bufferData + i*aAudio->mFrames + offset);
   }
-  aOutput->AppendFrames(buffer.forget(), channels, aAudio->mFrames);
-  VERBOSE_LOG("writing %d frames of data to MediaStream for AudioData at %lld",
-              aAudio->mFrames - int32_t(offset), aAudio->mTime);
-  aStream->mAudioFramesWritten += aAudio->mFrames - int32_t(offset);
+  aOutput->AppendFrames(buffer.forget(), channels, framesToWrite);
+  VERBOSE_LOG("writing %u frames of data to MediaStream for AudioData at %lld",
+              static_cast<unsigned>(framesToWrite),
+              aAudio->mTime);
+  aStream->mAudioFramesWritten += framesToWrite;
 }
 
 static void WriteVideoToMediaStream(layers::Image* aImage,
-- 
2.2.1