1 files changed, 70 insertions, 0 deletions
diff --git a/dom/media/platforms/agnostic/OpusDecoder.h b/dom/media/platforms/agnostic/OpusDecoder.h
new file mode 100644
index 0000000000..3df3471292
--- /dev/null
+++ b/dom/media/platforms/agnostic/OpusDecoder.h
@@ -0,0 +1,70 @@
+/* -*- 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 "nsTArray.h"
+
+struct OpusMSDecoder;
+
+namespace mozilla {
+
+class OpusParser;
+
+DDLoggedTypeDeclNameAndBase(OpusDataDecoder, MediaDataDecoder);
+
+class OpusDataDecoder final : public MediaDataDecoder,
+                              public DecoderDoctorLifeLogger<OpusDataDecoder> {
+ public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(OpusDataDecoder, final);
+
+  explicit OpusDataDecoder(const CreateDecoderParams& aParams);
+
+  RefPtr<InitPromise> Init() override;
+  RefPtr<DecodePromise> Decode(MediaRawData* aSample) override;
+  RefPtr<DecodePromise> Drain() override;
+  RefPtr<FlushPromise> Flush() override;
+  RefPtr<ShutdownPromise> Shutdown() override;
+  nsCString GetDescriptionName() const override {
+    return "opus audio decoder"_ns;
+  }
+  nsCString GetCodecName() const override { return "opus"_ns; }
+
+  // Return true if mimetype is Opus
+  static bool IsOpus(const nsACString& aMimeType);
+
+ private:
+  ~OpusDataDecoder();
+
+  nsresult DecodeHeader(const unsigned char* aData, size_t aLength);
+
+  const AudioInfo mInfo;
+  nsCOMPtr<nsISerialEventTarget> mThread;
+
+  // Opus decoder state
+  UniquePtr<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;
+  int64_t mTotalFrames = 0;
+  Maybe<int64_t> mLastFrameTime;
+  AutoTArray<uint8_t, 8> mMappingTable;
+  AudioConfig::ChannelLayout::ChannelMap mChannelMap;
+  bool mDefaultPlaybackDeviceMono;
+};
+
+}  // namespace mozilla
+#endif