import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/media/platforms/wmf/WMFAudioMFTManager.h

@@ -0,0 +1,78 @@
+/* -*- 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(WMFAudioOutputSource_h_)
+#define WMFAudioOutputSource_h_
+
+#include "WMF.h"
+#include "MFTDecoder.h"
+#include "mozilla/RefPtr.h"
+#include "WMFMediaDataDecoder.h"
+
+extern const GUID CLSID_WebmMfVpxDec;
+
+namespace mozilla {
+
+class WMFAudioMFTManager : public MFTManager {
+public:
+  WMFAudioMFTManager(const AudioInfo& aConfig);
+  ~WMFAudioMFTManager();
+
+  bool Init();
+
+  HRESULT Input(MediaRawData* aSample) override;
+
+  // Note WMF's AAC decoder sometimes output negatively timestamped samples,
+  // presumably they're the preroll samples, and we strip them. We may return
+  // a null aOutput in this case.
+  HRESULT Output(int64_t aStreamOffset,
+                         RefPtr<MediaData>& aOutput) override;
+
+  void Shutdown() override;
+
+  TrackInfo::TrackType GetType() override {
+    return TrackInfo::kAudioTrack;
+  }
+
+  const char* GetDescriptionName() const override
+  {
+    return "wmf audio decoder";
+  }
+
+private:
+
+  HRESULT UpdateOutputType();
+
+  uint32_t mAudioChannels;
+  uint32_t mAudioRate;
+  nsTArray<BYTE> mUserData;
+
+  // The offset, at which playback started since the
+  // last discontinuity.
+  media::TimeUnit mAudioTimeOffset;
+  // The number of audio frames that we've played since the last
+  // discontinuity.
+  int64_t mAudioFrameSum;
+
+  enum StreamType {
+    Unknown,
+    AAC,
+    MP3
+  };
+  StreamType mStreamType;
+
+  const GUID& GetMFTGUID();
+  const GUID& GetMediaSubtypeGUID();
+
+  // True if we need to re-initialize mAudioTimeOffset and mAudioFrameSum
+  // from the next audio packet we decode. This happens after a seek, since
+  // WMF doesn't mark a stream as having a discontinuity after a seek(0).
+  bool mMustRecaptureAudioPosition;
+};
+
+} // namespace mozilla
+
+#endif // WMFAudioOutputSource_h_