25d26028c1
Remove webm_parser/clang-format-style. Run clang-format -style=file -i for each source file. Change-Id: Ieaf44bd323375cbcfec67014e94b7742d6bda14a
66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
// Copyright (c) 2016 The WebM project authors. All Rights Reserved.
|
|
//
|
|
// Use of this source code is governed by a BSD-style license
|
|
// that can be found in the LICENSE file in the root of the source
|
|
// tree. An additional intellectual property rights grant can be found
|
|
// in the file PATENTS. All contributing project authors may
|
|
// be found in the AUTHORS file in the root of the source tree.
|
|
#ifndef SRC_BLOCK_HEADER_PARSER_H_
|
|
#define SRC_BLOCK_HEADER_PARSER_H_
|
|
|
|
#include <cassert>
|
|
#include <cstdint>
|
|
|
|
#include "src/parser.h"
|
|
#include "src/var_int_parser.h"
|
|
#include "webm/callback.h"
|
|
#include "webm/reader.h"
|
|
#include "webm/status.h"
|
|
|
|
namespace webm {
|
|
|
|
struct BlockHeader {
|
|
std::uint64_t track_number;
|
|
std::int16_t timecode;
|
|
std::uint8_t flags;
|
|
|
|
bool operator==(const BlockHeader& other) const {
|
|
return track_number == other.track_number && timecode == other.timecode &&
|
|
flags == other.flags;
|
|
}
|
|
};
|
|
|
|
class BlockHeaderParser : public Parser {
|
|
public:
|
|
Status Feed(Callback* callback, Reader* reader,
|
|
std::uint64_t* num_bytes_read) override;
|
|
|
|
// Gets the parsed block header information. This must not be called until the
|
|
// parse has been successfully completed.
|
|
const BlockHeader& value() const {
|
|
assert(state_ == State::kDone);
|
|
return value_;
|
|
}
|
|
|
|
private:
|
|
BlockHeader value_;
|
|
|
|
VarIntParser uint_parser_;
|
|
|
|
int timecode_bytes_remaining_ = 2;
|
|
|
|
enum class State {
|
|
/* clang-format off */
|
|
// State Transitions to state When
|
|
kReadingTrackNumber, // kReadingTimecode track parsed
|
|
kReadingTimecode, // kReadingFlags timecode parsed
|
|
kReadingFlags, // kDone flags parsed
|
|
kDone, // No transitions from here (must call Init)
|
|
/* clang-format on */
|
|
} state_ = State::kReadingTrackNumber;
|
|
};
|
|
|
|
} // namespace webm
|
|
|
|
#endif // SRC_BLOCK_HEADER_PARSER_H_
|