michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim:set ts=2 sw=2 sts=2 et cindent: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: #if !defined(OpusParser_h_)
michael@0: #define OpusParser_h_
michael@0: 
michael@0: #include <stdint.h>
michael@0: 
michael@0: #include <opus/opus.h>
michael@0: #include "opus/opus_multistream.h"
michael@0: 
michael@0: #include "nsTArray.h"
michael@0: #include "nsString.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: 
michael@0: class OpusParser
michael@0: {
michael@0: public:
michael@0:   OpusParser();
michael@0: 
michael@0:   bool DecodeHeader(unsigned char* aData, size_t aLength);
michael@0:   bool DecodeTags(unsigned char* aData, size_t aLength);
michael@0: 
michael@0:   // Various fields from the Ogg Opus header.
michael@0:   int mRate;        // Sample rate the decoder uses (always 48 kHz).
michael@0:   uint32_t mNominalRate; // Original sample rate of the data (informational).
michael@0:   int mChannels;    // Number of channels the stream encodes.
michael@0:   uint16_t mPreSkip; // Number of samples to strip after decoder reset.
michael@0: #ifdef MOZ_SAMPLE_TYPE_FLOAT32
michael@0:   float mGain;      // Gain to apply to decoder output.
michael@0: #else
michael@0:   int32_t mGain_Q16; // Gain to apply to the decoder output.
michael@0: #endif
michael@0:   int mChannelMapping; // Channel mapping family.
michael@0:   int mStreams;     // Number of packed streams in each packet.
michael@0:   int mCoupledStreams; // Number of packed coupled streams in each packet.
michael@0:   unsigned char mMappingTable[255]; // Channel mapping table.
michael@0: 
michael@0:   // Granule position (end sample) of the last decoded Opus packet. This is
michael@0:   // used to calculate the amount we should trim from the last packet.
michael@0:   int64_t mPrevPacketGranulepos;
michael@0: 
michael@0:   nsTArray<nsCString> mTags; // Unparsed comment strings from the header.
michael@0: 
michael@0:   nsCString mVendorString;   // Encoder vendor string from the header.
michael@0: 
michael@0: };
michael@0: 
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif