64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef FLAC_FRAME_PARSER_H_
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#define FLAC_FRAME_PARSER_H_
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#include "mozilla/Maybe.h"
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#include "nsAutoPtr.h"
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#include "MediaDecoder.h" // For MetadataTags
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#include "MediaInfo.h"
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#include "MediaResource.h"
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namespace mozilla
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{
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class OpusParser;
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// Decode a Flac Metadata block contained in either a ogg packet
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// (https://xiph.org/flac/ogg_mapping.html) or in flac container
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// (https://xiph.org/flac/format.html#frame_header)
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class FlacFrameParser
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{
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public:
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FlacFrameParser();
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~FlacFrameParser();
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bool IsHeaderBlock(const uint8_t* aPacket, size_t aLength) const;
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// Return the length of the block header (METADATA_BLOCK_HEADER+
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// METADATA_BLOCK_DATA), aPacket must point to at least 4
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// bytes and to a valid block header start (as determined by IsHeaderBlock).
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uint32_t HeaderBlockLength(const uint8_t* aPacket) const;
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bool DecodeHeaderBlock(const uint8_t* aPacket, size_t aLength);
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bool HasFullMetadata() const { return mFullMetadata; }
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// Return the duration in frames found in the block. -1 if error
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// such as invalid packet.
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int64_t BlockDuration(const uint8_t* aPacket, size_t aLength) const;
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// Return a hash table with tag metadata.
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MetadataTags* GetTags() const;
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AudioInfo mInfo;
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private:
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bool ReconstructFlacGranulepos(void);
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Maybe<uint32_t> mNumHeaders;
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uint32_t mMinBlockSize;
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uint32_t mMaxBlockSize;
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uint32_t mMinFrameSize;
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uint32_t mMaxFrameSize;
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uint64_t mNumFrames;
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bool mFullMetadata;
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uint32_t mPacketCount;
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// Used to decode the vorbis comment metadata.
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nsAutoPtr<OpusParser> mParser;
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};
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}
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#endif // FLAC_FRAME_PARSER_H_
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