From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 19:32:43 +0200 Subject: Adding upstream version 1:115.7.0. Signed-off-by: Daniel Baumann --- dom/media/flac/FlacFrameParser.h | 72 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 dom/media/flac/FlacFrameParser.h (limited to 'dom/media/flac/FlacFrameParser.h') diff --git a/dom/media/flac/FlacFrameParser.h b/dom/media/flac/FlacFrameParser.h new file mode 100644 index 0000000000..2bd457ea03 --- /dev/null +++ b/dom/media/flac/FlacFrameParser.h @@ -0,0 +1,72 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* 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/. */ + +#ifndef FLAC_FRAME_PARSER_H_ +#define FLAC_FRAME_PARSER_H_ + +#include "mozilla/Maybe.h" +#include "mozilla/Result.h" +#include "MediaDecoder.h" // For MetadataTags +#include "MediaInfo.h" +#include "MediaResource.h" + +namespace mozilla { + +#define FLAC_MAX_CHANNELS 8 +#define FLAC_MIN_BLOCKSIZE 16 +#define FLAC_MAX_BLOCKSIZE 65535 +#define FLAC_MIN_FRAME_SIZE 11 +#define FLAC_MAX_FRAME_HEADER_SIZE 16 +#define FLAC_MAX_FRAME_SIZE \ + (FLAC_MAX_FRAME_HEADER_SIZE + FLAC_MAX_BLOCKSIZE * FLAC_MAX_CHANNELS * 3) + +class OpusParser; + +// Decode a Flac Metadata block contained in either a ogg packet +// (https://xiph.org/flac/ogg_mapping.html) or in flac container +// (https://xiph.org/flac/format.html#frame_header) + +class FlacFrameParser { + public: + FlacFrameParser(); + ~FlacFrameParser(); + + Result IsHeaderBlock(const uint8_t* aPacket, + size_t aLength) const; + // Return the length of the block header (METADATA_BLOCK_HEADER+ + // METADATA_BLOCK_DATA), aPacket must point to at least 4 + // bytes and to a valid block header start (as determined by IsHeaderBlock). + uint32_t HeaderBlockLength(const uint8_t* aPacket) const; + Result DecodeHeaderBlock(const uint8_t* aPacket, + size_t aLength); + bool HasFullMetadata() const { return mFullMetadata; } + // Return the duration in frames found in the block. -1 if error + // such as invalid packet. + int64_t BlockDuration(const uint8_t* aPacket, size_t aLength) const; + + // Return a hash table with tag metadata. + UniquePtr GetTags() const; + + AudioInfo mInfo; + + private: + bool ReconstructFlacGranulepos(void); + Maybe mNumHeaders; + uint32_t mMinBlockSize; + uint32_t mMaxBlockSize; + uint32_t mMinFrameSize; + uint32_t mMaxFrameSize; + uint64_t mNumFrames; + bool mFullMetadata; + uint32_t mPacketCount; + + // Used to decode the vorbis comment metadata. + UniquePtr mParser; +}; + +} // namespace mozilla + +#endif // FLAC_FRAME_PARSER_H_ -- cgit v1.2.3