| // 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 MKVMUXERUTIL_HPP |
| #define MKVMUXERUTIL_HPP |
| |
| #include "mkvmuxertypes.hpp" |
| |
| namespace mkvmuxer { |
| |
| class IMkvWriter; |
| |
| const uint64 kEbmlUnknownValue = 0x01FFFFFFFFFFFFFFULL; |
| |
| // Writes out |value| in Big Endian order. Returns 0 on success. |
| int32 SerializeInt(IMkvWriter* writer, int64 value, int32 size); |
| |
| // Returns the size in bytes of the element. |
| uint64 EbmlMasterElementSize(uint64 type, uint64 value); |
| uint64 EbmlElementSize(uint64 type, uint64 value); |
| uint64 EbmlElementSize(uint64 type, float value); |
| uint64 EbmlElementSize(uint64 type, const char* value); |
| uint64 EbmlElementSize(uint64 type, const uint8* value, uint64 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 WriteUInt(IMkvWriter* writer, uint64 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 WriteUIntSize(IMkvWriter* writer, uint64 value, int32 size); |
| |
| // Output an Mkv master element. Returns true if the element was written. |
| bool WriteEbmlMasterElement(IMkvWriter* writer, uint64 value, uint64 size); |
| |
| // Outputs an Mkv ID, calls |IMkvWriter::ElementStartNotify|, and passes the |
| // ID to |SerializeInt|. Returns 0 on success. |
| int32 WriteID(IMkvWriter* writer, uint64 type); |
| |
| // Output an Mkv non-master element. Returns true if the element was written. |
| bool WriteEbmlElement(IMkvWriter* writer, uint64 type, uint64 value); |
| bool WriteEbmlElement(IMkvWriter* writer, uint64 type, float value); |
| bool WriteEbmlElement(IMkvWriter* writer, uint64 type, const char* value); |
| bool WriteEbmlElement(IMkvWriter* writer, |
| uint64 type, |
| const uint8* value, |
| uint64 size); |
| |
| // Output an Mkv Simple Block. |
| // Inputs: |
| // data: Pointer to the data. |
| // length: Length of the data. |
| // track_number: Track to add the data to. Value returned by Add track |
| // functions. Only values in the range [1, 126] are |
| // permitted. |
| // timecode: Relative timecode of the Block. Only values in the |
| // range [0, 2^15) are permitted. |
| // is_key: Non-zero value specifies that frame is a key frame. |
| uint64 WriteSimpleBlock(IMkvWriter* writer, |
| const uint8* data, |
| uint64 length, |
| uint64 track_number, |
| int64 timecode, |
| uint64 is_key); |
| |
| // Output a metadata keyframe, using a Block Group element. |
| // Inputs: |
| // data: Pointer to the (meta)data. |
| // length: Length of the (meta)data. |
| // track_number: Track to add the data to. Value returned by Add track |
| // functions. Only values in the range [1, 126] are |
| // permitted. |
| // timecode Timecode of frame, relative to cluster timecode. Only |
| // values in the range [0, 2^15) are permitted. |
| // duration_timecode Duration of frame, using timecode units. |
| uint64 WriteMetadataBlock(IMkvWriter* writer, |
| const uint8* data, |
| uint64 length, |
| uint64 track_number, |
| int64 timecode, |
| uint64 duration_timecode); |
| |
| // 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 WriteVoidElement(IMkvWriter* writer, uint64 size); |
| |
| // Returns the version number of the muxer in |major|, |minor|, |build|, |
| // and |revision|. |
| void GetVersion(int32* major, int32* minor, int32* build, int32* 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 MakeUID(unsigned int* seed); |
| |
| } //end namespace mkvmuxer |
| |
| #endif // MKVMUXERUTIL_HPP |