1 // Copyright (c) 2016 The WebM project authors. All Rights Reserved. 2 // 3 // Use of this source code is governed by a BSD-style license 4 // that can be found in the LICENSE file in the root of the source 5 // tree. An additional intellectual property rights grant can be found 6 // in the file PATENTS. All contributing project authors may 7 // be found in the AUTHORS file in the root of the source tree. 8 #ifndef SRC_ID_ELEMENT_PARSER_H_ 9 #define SRC_ID_ELEMENT_PARSER_H_ 10 11 #include <cstdint> 12 13 #include "src/element_parser.h" 14 #include "webm/callback.h" 15 #include "webm/reader.h" 16 #include "webm/status.h" 17 18 namespace webm { 19 20 class IdElementParser : public ElementParser { 21 public: 22 IdElementParser() = default; 23 24 IdElementParser(IdElementParser&&) = default; 25 IdElementParser& operator=(IdElementParser&&) = default; 26 27 IdElementParser(const IdElementParser&) = delete; 28 IdElementParser& operator=(const IdElementParser&) = delete; 29 30 Status Init(const ElementMetadata& metadata, std::uint64_t max_size) override; 31 32 Status Feed(Callback* callback, Reader* reader, 33 std::uint64_t* num_bytes_read) override; 34 35 // Gets the parsed Id. This must not be called until the parse had been 36 // successfully completed. value()37 Id value() const { 38 assert(num_bytes_remaining_ == 0); 39 return value_; 40 } 41 42 // Gets the parsed Id. This must not be called until the parse had been 43 // successfully completed. mutable_value()44 Id* mutable_value() { 45 assert(num_bytes_remaining_ == 0); 46 return &value_; 47 } 48 49 private: 50 Id value_; 51 int num_bytes_remaining_ = -1; 52 }; 53 54 } // namespace webm 55 56 #endif // SRC_ID_ELEMENT_PARSER_H_ 57