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/* -*- 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 : public MediaDataDecoder,
public DecoderDoctorLifeLogger<OpusDataDecoder> {
public:
explicit OpusDataDecoder(const CreateDecoderParams& aParams);
~OpusDataDecoder();
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;
}
// 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);
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;
Maybe<int64_t> mLastFrameTime;
AutoTArray<uint8_t, 8> mMappingTable;
AudioConfig::ChannelLayout::ChannelMap mChannelMap;
bool mDefaultPlaybackDeviceMono;
};
} // namespace mozilla
#endif
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