ref: f664d3f6d53a20319fbd4ececc64c5fd190c8215
dir: /third_party/libwebm/mkvmuxer/mkvmuxerutil.h/
// Copyright (c) 2012 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 MKVMUXER_MKVMUXERUTIL_H_ #define MKVMUXER_MKVMUXERUTIL_H_ #include <stdint.h> namespace mkvmuxer { class Cluster; class Frame; class IMkvWriter; const uint64_t kEbmlUnknownValue = 0x01FFFFFFFFFFFFFFULL; const int64_t kMaxBlockTimecode = 0x07FFFLL; // Writes out |value| in Big Endian order. Returns 0 on success. int32_t SerializeInt(IMkvWriter* writer, int64_t value, int32_t size); // Returns the size in bytes of the element. int32_t GetUIntSize(uint64_t value); int32_t GetIntSize(int64_t value); int32_t GetCodedUIntSize(uint64_t value); uint64_t EbmlMasterElementSize(uint64_t type, uint64_t value); uint64_t EbmlElementSize(uint64_t type, int64_t value); uint64_t EbmlElementSize(uint64_t type, uint64_t value); uint64_t EbmlElementSize(uint64_t type, float value); uint64_t EbmlElementSize(uint64_t type, const char* value); uint64_t EbmlElementSize(uint64_t type, const uint8_t* value, uint64_t size); uint64_t EbmlDateElementSize(uint64_t type); // Returns the size in bytes of the element assuming that the element was // written using |fixed_size| bytes. If |fixed_size| is set to zero, then it // computes the necessary number of bytes based on |value|. uint64_t EbmlElementSize(uint64_t type, uint64_t value, uint64_t fixed_size); // Creates an EBML coded number from |value| and writes it out. The size of // the coded number is determined by the value of |value|. |value| must not // be in a coded form. Returns 0 on success. int32_t WriteUInt(IMkvWriter* writer, uint64_t value); // Creates an EBML coded number from |value| and writes it out. The size of // the coded number is determined by the value of |size|. |value| must not // be in a coded form. Returns 0 on success. int32_t WriteUIntSize(IMkvWriter* writer, uint64_t value, int32_t size); // Output an Mkv master element. Returns true if the element was written. bool WriteEbmlMasterElement(IMkvWriter* writer, uint64_t value, uint64_t size); // Outputs an Mkv ID, calls |IMkvWriter::ElementStartNotify|, and passes the // ID to |SerializeInt|. Returns 0 on success. int32_t WriteID(IMkvWriter* writer, uint64_t type); // Output an Mkv non-master element. Returns true if the element was written. bool WriteEbmlElement(IMkvWriter* writer, uint64_t type, uint64_t value); bool WriteEbmlElement(IMkvWriter* writer, uint64_t type, int64_t value); bool WriteEbmlElement(IMkvWriter* writer, uint64_t type, float value); bool WriteEbmlElement(IMkvWriter* writer, uint64_t type, const char* value); bool WriteEbmlElement(IMkvWriter* writer, uint64_t type, const uint8_t* value, uint64_t size); bool WriteEbmlDateElement(IMkvWriter* writer, uint64_t type, int64_t value); // Output an Mkv non-master element using fixed size. The element will be // written out using exactly |fixed_size| bytes. If |fixed_size| is set to zero // then it computes the necessary number of bytes based on |value|. Returns true // if the element was written. bool WriteEbmlElement(IMkvWriter* writer, uint64_t type, uint64_t value, uint64_t fixed_size); // Output a Mkv Frame. It decides the correct element to write (Block vs // SimpleBlock) based on the parameters of the Frame. uint64_t WriteFrame(IMkvWriter* writer, const Frame* const frame, Cluster* cluster); // Output a void element. |size| must be the entire size in bytes that will be // void. The function will calculate the size of the void header and subtract // it from |size|. uint64_t WriteVoidElement(IMkvWriter* writer, uint64_t size); // Returns the version number of the muxer in |major|, |minor|, |build|, // and |revision|. void GetVersion(int32_t* major, int32_t* minor, int32_t* build, int32_t* revision); // Returns a random number to be used for UID, using |seed| to seed // the random-number generator (see POSIX rand_r() for semantics). uint64_t MakeUID(unsigned int* seed); } // namespace mkvmuxer #endif // MKVMUXER_MKVMUXERUTIL_H_