1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/ogg/OpusParser.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,54 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim:set ts=2 sw=2 sts=2 et cindent: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +#if !defined(OpusParser_h_)
1.10 +#define OpusParser_h_
1.11 +
1.12 +#include <stdint.h>
1.13 +
1.14 +#include <opus/opus.h>
1.15 +#include "opus/opus_multistream.h"
1.16 +
1.17 +#include "nsTArray.h"
1.18 +#include "nsString.h"
1.19 +
1.20 +namespace mozilla {
1.21 +
1.22 +class OpusParser
1.23 +{
1.24 +public:
1.25 + OpusParser();
1.26 +
1.27 + bool DecodeHeader(unsigned char* aData, size_t aLength);
1.28 + bool DecodeTags(unsigned char* aData, size_t aLength);
1.29 +
1.30 + // Various fields from the Ogg Opus header.
1.31 + int mRate; // Sample rate the decoder uses (always 48 kHz).
1.32 + uint32_t mNominalRate; // Original sample rate of the data (informational).
1.33 + int mChannels; // Number of channels the stream encodes.
1.34 + uint16_t mPreSkip; // Number of samples to strip after decoder reset.
1.35 +#ifdef MOZ_SAMPLE_TYPE_FLOAT32
1.36 + float mGain; // Gain to apply to decoder output.
1.37 +#else
1.38 + int32_t mGain_Q16; // Gain to apply to the decoder output.
1.39 +#endif
1.40 + int mChannelMapping; // Channel mapping family.
1.41 + int mStreams; // Number of packed streams in each packet.
1.42 + int mCoupledStreams; // Number of packed coupled streams in each packet.
1.43 + unsigned char mMappingTable[255]; // Channel mapping table.
1.44 +
1.45 + // Granule position (end sample) of the last decoded Opus packet. This is
1.46 + // used to calculate the amount we should trim from the last packet.
1.47 + int64_t mPrevPacketGranulepos;
1.48 +
1.49 + nsTArray<nsCString> mTags; // Unparsed comment strings from the header.
1.50 +
1.51 + nsCString mVendorString; // Encoder vendor string from the header.
1.52 +
1.53 +};
1.54 +
1.55 +} // namespace mozilla
1.56 +
1.57 +#endif
