1 files changed, 76 insertions, 0 deletions
diff --git a/dom/media/directshow/AudioSinkInputPin.h b/dom/media/directshow/AudioSinkInputPin.h
new file mode 100644
index 000000000..80503c641
--- /dev/null
+++ b/dom/media/directshow/AudioSinkInputPin.h
@@ -0,0 +1,76 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#if !defined(AudioSinkInputPin_h_)
+#define AudioSinkInputPin_h_
+
+#include "BaseInputPin.h"
+#include "DirectShowUtils.h"
+#include "mozilla/RefPtr.h"
+#include "nsAutoPtr.h"
+
+namespace mozilla {
+
+namespace media {
+  class MediaType;
+}
+
+class AudioSinkFilter;
+class SampleSink;
+
+
+// Input pin for capturing audio output of a DirectShow filter graph.
+// This is the input pin for the AudioSinkFilter.
+class AudioSinkInputPin: public mozilla::media::BaseInputPin
+{
+public:
+  AudioSinkInputPin(wchar_t* aObjectName,
+                    AudioSinkFilter* aFilter,
+                    mozilla::CriticalSection* aLock,
+                    HRESULT* aOutResult);
+  virtual ~AudioSinkInputPin();
+
+  HRESULT GetMediaType (IN int iPos, OUT mozilla::media::MediaType * pmt);
+  HRESULT CheckMediaType (IN const mozilla::media::MediaType * pmt);
+  STDMETHODIMP Receive (IN IMediaSample *);
+  STDMETHODIMP BeginFlush() override;
+  STDMETHODIMP EndFlush() override;
+
+  // Called when we start decoding a new segment, that happens directly after
+  // a seek. This captures the segment's start time. Samples decoded by the
+  // MP3 decoder have their timestamps offset from the segment start time.
+  // Storing the segment start time enables us to set each sample's MediaTime
+  // as an offset in the stream relative to the start of the stream, rather
+  // than the start of the segment, i.e. its absolute time in the stream.
+  STDMETHODIMP NewSegment(REFERENCE_TIME tStart,
+                          REFERENCE_TIME tStop,
+                          double dRate) override;
+
+  STDMETHODIMP EndOfStream() override;
+
+  // Returns the IMediaSeeking interface of the connected output pin.
+  // We forward seeking requests upstream from the sink to the source
+  // filters.
+  already_AddRefed<IMediaSeeking> GetConnectedPinSeeking();
+
+  SampleSink* GetSampleSink();
+
+private:
+  AudioSinkFilter* GetAudioSinkFilter();
+
+  // Sets the media time on the media sample, relative to the segment
+  // start time.
+  HRESULT SetAbsoluteMediaTime(IMediaSample* aSample);
+
+  nsAutoPtr<SampleSink> mSampleSink;
+
+  // Synchronized by the filter lock; BaseInputPin::mLock.
+  REFERENCE_TIME mSegmentStartTime;
+};
+
+} // namespace mozilla
+
+#endif // AudioSinkInputPin_h_