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Diffstat (limited to 'chromium/third_party/libwebm/source/mkvmuxerutil.hpp')
| -rw-r--r-- | chromium/third_party/libwebm/source/mkvmuxerutil.hpp | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/chromium/third_party/libwebm/source/mkvmuxerutil.hpp b/chromium/third_party/libwebm/source/mkvmuxerutil.hpp new file mode 100644 index 00000000000..a092abe7a3a --- /dev/null +++ b/chromium/third_party/libwebm/source/mkvmuxerutil.hpp @@ -0,0 +1,137 @@ +// 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; +const int64 kMaxBlockTimecode = 0x07FFFLL; + +// 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. +int32 GetUIntSize(uint64 value); +int32 GetCodedUIntSize(uint64 value); +uint64 EbmlMasterElementSize(uint64 type, uint64 value); +uint64 EbmlElementSize(uint64 type, int64 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); +uint64 EbmlDateElementSize(uint64 type, int64 value); + +// 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); +bool WriteEbmlDateElement(IMkvWriter* writer, uint64 type, int64 value); + +// 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 an Mkv Block with BlockAdditional data. +// Inputs: +// data: Pointer to the data. +// length: Length of the data. +// additional: Pointer to the additional data +// additional_length: Length of the additional data. +// add_id: Value of BlockAddID element. +// 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 WriteBlockWithAdditional(IMkvWriter* writer, const uint8* data, + uint64 length, const uint8* additional, + uint64 additional_length, uint64 add_id, + uint64 track_number, int64 timecode, + uint64 is_key); + +// Output an Mkv Block with a DiscardPadding element. +// Inputs: +// data: Pointer to the data. +// length: Length of the data. +// discard_padding: DiscardPadding value. +// 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 WriteBlockWithDiscardPadding(IMkvWriter* writer, const uint8* data, + uint64 length, int64 discard_padding, + uint64 track_number, int64 timecode, + uint64 is_key); + +// 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 |