/* -*- 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(OpusParser_h_) #define OpusParser_h_ #include "nsTArray.h" #include "nsString.h" namespace mozilla { class OpusParser { public: OpusParser(); bool DecodeHeader(unsigned char* aData, size_t aLength); bool DecodeTags(unsigned char* aData, size_t aLength); // Various fields from the Ogg Opus header. int mRate; // Sample rate the decoder uses (always 48 kHz). uint32_t mNominalRate; // Original sample rate of the data (informational). int mChannels; // Number of channels the stream encodes. uint16_t mPreSkip; // Number of samples to strip after decoder reset. #ifdef MOZ_SAMPLE_TYPE_FLOAT32 float mGain; // Gain to apply to decoder output. #else int32_t mGain_Q16; // Gain to apply to the decoder output. #endif int mChannelMapping; // Channel mapping family. int mStreams; // Number of packed streams in each packet. int mCoupledStreams; // Number of packed coupled streams in each packet. unsigned char mMappingTable[255]; // Channel mapping table. // Granule position (end sample) of the last decoded Opus packet. This is // used to calculate the amount we should trim from the last packet. int64_t mPrevPacketGranulepos; nsTArray<nsCString> mTags; // Unparsed comment strings from the header. nsCString mVendorString; // Encoder vendor string from the header. }; } // namespace mozilla #endif