1 files changed, 76 insertions, 0 deletions
diff --git a/dom/media/platforms/agnostic/OpusDecoder.h b/dom/media/platforms/agnostic/OpusDecoder.h
new file mode 100644
index 000000000..6d82ae502
--- /dev/null
+++ b/dom/media/platforms/agnostic/OpusDecoder.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(OpusDecoder_h_)
+#define OpusDecoder_h_
+
+#include "PlatformDecoderModule.h"
+
+#include "mozilla/Maybe.h"
+#include "nsAutoPtr.h"
+
+struct OpusMSDecoder;
+
+namespace mozilla {
+
+class OpusParser;
+
+class OpusDataDecoder : public MediaDataDecoder
+{
+public:
+  explicit OpusDataDecoder(const CreateDecoderParams& aParams);
+  ~OpusDataDecoder();
+
+  RefPtr<InitPromise> Init() override;
+  void Input(MediaRawData* aSample) override;
+  void Flush() override;
+  void Drain() override;
+  void Shutdown() override;
+  const char* GetDescriptionName() const override
+  {
+    return "opus audio decoder";
+  }
+
+  // Return true if mimetype is Opus
+  static bool IsOpus(const nsACString& aMimeType);
+
+  // Pack pre-skip/CodecDelay, given in microseconds, into a
+  // MediaByteBuffer. The decoder expects this value to come
+  // from the container (if any) and to precede the OpusHead
+  // block in the CodecSpecificConfig buffer to verify the
+  // values match.
+  static void AppendCodecDelay(MediaByteBuffer* config, uint64_t codecDelayUS);
+
+private:
+  nsresult DecodeHeader(const unsigned char* aData, size_t aLength);
+
+  void ProcessDecode(MediaRawData* aSample);
+  MediaResult DoDecode(MediaRawData* aSample);
+  void ProcessDrain();
+
+  const AudioInfo& mInfo;
+  const RefPtr<TaskQueue> mTaskQueue;
+  MediaDataDecoderCallback* mCallback;
+
+  // Opus decoder state
+  nsAutoPtr<OpusParser> mOpusParser;
+  OpusMSDecoder* mOpusDecoder;
+
+  uint16_t mSkip;        // Samples left to trim before playback.
+  bool mDecodedHeader;
+
+  // Opus padding should only be discarded on the final packet.  Once this
+  // is set to true, if the reader attempts to decode any further packets it
+  // will raise an error so we can indicate that the file is invalid.
+  bool mPaddingDiscarded;
+  int64_t mFrames;
+  Maybe<int64_t> mLastFrameTime;
+  uint8_t mMappingTable[MAX_AUDIO_CHANNELS]; // Channel mapping table.
+
+  Atomic<bool> mIsFlushing;
+};
+
+} // namespace mozilla
+#endif