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# Names should be added to this file like so:
# Name or Organization <email address>
Google Inc.

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Copyright (c) 2010, Google Inc. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name of Google nor the names of its contributors may
be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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Additional IP Rights Grant (Patents)
------------------------------------
"These implementations" means the copyrightable works that implement the WebM
codecs distributed by Google as part of the WebM Project.
Google hereby grants to you a perpetual, worldwide, non-exclusive, no-charge,
royalty-free, irrevocable (except as stated in this section) patent license to
make, have made, use, offer to sell, sell, import, transfer, and otherwise
run, modify and propagate the contents of these implementations of WebM, where
such license applies only to those patent claims, both currently owned by
Google and acquired in the future, licensable by Google that are necessarily
infringed by these implementations of WebM. This grant does not include claims
that would be infringed only as a consequence of further modification of these
implementations. If you or your agent or exclusive licensee institute or order
or agree to the institution of patent litigation or any other patent
enforcement activity against any entity (including a cross-claim or
counterclaim in a lawsuit) alleging that any of these implementations of WebM
or any code incorporated within any of these implementations of WebM
constitute direct or contributory patent infringement, or inducement of
patent infringement, then any patent rights granted to you under this License
for these implementations of WebM shall terminate as of the date such
litigation is filed.

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Building Libwebm
To build libwebm you must first create project files. To do this run cmake
and pass it the path to your libwebm repo.
Makefile.unix can be used as a fallback on systems that cmake does not
support.
CMake Basics
To generate project/make files for the default toolchain on your system simply
run cmake with the path to the libwebm repo:
$ cmake path/to/libwebm
On Windows the above command will produce Visual Studio project files for the
newest Visual Studio detected on the system. On Mac OS X and Linux systems, the
above command will produce a makefile.
To control what types of projects are generated the -G parameter is added to
the cmake command line. This argument must be followed by the name of a
generator. Running cmake with the --help argument will list the available
generators for your system.
On Mac OS X you would run the following command to generate Xcode projects:
$ cmake path/to/libwebm -G Xcode
On a Windows box you would run the following command to generate Visual Studio
2013 projects:
$ cmake path/to/libwebm -G "Visual Studio 12"
To generate 64-bit Windows Visual Studio 2013 projects:
$ cmake path/to/libwebm "Visual Studio 12 Win64"
CMake Makefiles: Debugging and Optimization
Unlike Visual Studio and Xcode projects, the build configuration for make builds
is controlled when you run cmake. The following examples demonstrate various
build configurations.
Omitting the build type produces makefiles that use build flags containing
neither optimization nor debug flags:
$ cmake path/to/libwebm
A makefile using release (optimized) flags is produced like this:
$ cmake path/to/libwebm -DCMAKE_BUILD_TYPE=release
A release build with debug info can be produced as well:
$ cmake path/to/libwebm -DCMAKE_BUILD_TYPE=relwithdebinfo
And your standard debug build will be produced using:
$ cmake path/to/libwebm -DCMAKE_BUILD_TYPE=debug
Tests
To enable libwebm tests add -DENABLE_TESTS=ON CMake generation command line. For
example:
$ cmake path/to/libwebm -G Xcode -DENABLE_TESTS=ON
Libwebm tests depend on googletest. By default googletest is expected to be a
sibling directory of the Libwebm repository. To change that, update your CMake
command to be similar to the following:
$ cmake path/to/libwebm -G Xcode -DENABLE_TESTS=ON \
-DGTEST_SRC_DIR=/path/to/googletest
The tests rely upon the LIBWEBM_TEST_DATA_PATH environment variable to locate
test input. The following example demonstrates running the muxer tests from the
build directory:
$ LIBWEBM_TEST_DATA_PATH=path/to/libwebm/testing/testdata ./mkvmuxer_tests
Note: Libwebm Googletest integration was built with googletest from
https://github.com/google/googletest.git at git revision
ddb8012eb48bc203aa93dcc2b22c1db516302b29.
CMake Include-what-you-use integration
Include-what-you-use is an analysis tool that helps ensure libwebm includes the
C/C++ header files actually in use. To enable the integration support
ENABLE_IWYU must be turned on at cmake run time:
$ cmake path/to/libwebm -G "Unix Makefiles" -DENABLE_IWYU=ON
This adds the iwyu target to the build. To run include-what-you-use:
$ make iwyu
The following requirements must be met for ENABLE_IWYU to enable the iwyu
target:
1. include-what-you-use and iwyu_tool.py must be in your PATH.
2. A python interpreter must be on the system and available to CMake.
The values of the following variables are used to determine if the requirements
have been met. Values to the right of the equals sign are what a successful run
might look like:
iwyu_path=/path/to/iwyu_tool.py
iwyu_tool_path=/path/to/include-what-you-use
PYTHONINTERP_FOUND=TRUE
An empty PYTHONINTERP_FOUND, or iwyu_path/iwyu_tool_path suffixed with NOTFOUND
are failures.
For Include-what-you-use setup instructions, see:
https://github.com/include-what-you-use/include-what-you-use/blob/master/docs/InstructionsForUsers.md
If, when building the iwyu target, compile errors reporting failures loading
standard include files occur, one solution can be found here:
https://github.com/include-what-you-use/include-what-you-use/issues/100
CMake cross compile
To cross compile libwebm for Windows using mingw-w64 run cmake with the
following arguments:
$ cmake -DCMAKE_TOOLCHAIN_FILE=path/to/libwebm/build/mingw-w64_toolchain.cmake \
path/to/libwebm
Note1: As of this writing googletest will not build via mingw-w64 without
disabling pthreads.
googletest hash: d225acc90bc3a8c420a9bcd1f033033c1ccd7fe0
To build with tests when using mingw-w64 use the following arguments when
running CMake:
$ cmake -DCMAKE_TOOLCHAIN_FILE=path/to/libwebm/build/mingw-w64_toolchain.cmake \
-DENABLE_TESTS=ON -Dgtest_disable_pthreads=ON path/to/libwebm
Note2: i686-w64-mingw32 is the default compiler. This can be controlled using
the MINGW_PREFIX variable:
$ cmake -DCMAKE_TOOLCHAIN_FILE=path/to/libwebm/build/mingw-w64_toolchain.cmake \
-DMINGW_PREFIX=x86_64-w64-mingw32 path/to/libwebm

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// 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 COMMON_WEBMIDS_H_
#define COMMON_WEBMIDS_H_
namespace libwebm {
enum MkvId {
kMkvEBML = 0x1A45DFA3,
kMkvEBMLVersion = 0x4286,
kMkvEBMLReadVersion = 0x42F7,
kMkvEBMLMaxIDLength = 0x42F2,
kMkvEBMLMaxSizeLength = 0x42F3,
kMkvDocType = 0x4282,
kMkvDocTypeVersion = 0x4287,
kMkvDocTypeReadVersion = 0x4285,
kMkvVoid = 0xEC,
kMkvSignatureSlot = 0x1B538667,
kMkvSignatureAlgo = 0x7E8A,
kMkvSignatureHash = 0x7E9A,
kMkvSignaturePublicKey = 0x7EA5,
kMkvSignature = 0x7EB5,
kMkvSignatureElements = 0x7E5B,
kMkvSignatureElementList = 0x7E7B,
kMkvSignedElement = 0x6532,
// segment
kMkvSegment = 0x18538067,
// Meta Seek Information
kMkvSeekHead = 0x114D9B74,
kMkvSeek = 0x4DBB,
kMkvSeekID = 0x53AB,
kMkvSeekPosition = 0x53AC,
// Segment Information
kMkvInfo = 0x1549A966,
kMkvTimecodeScale = 0x2AD7B1,
kMkvDuration = 0x4489,
kMkvDateUTC = 0x4461,
kMkvTitle = 0x7BA9,
kMkvMuxingApp = 0x4D80,
kMkvWritingApp = 0x5741,
// Cluster
kMkvCluster = 0x1F43B675,
kMkvTimecode = 0xE7,
kMkvPrevSize = 0xAB,
kMkvBlockGroup = 0xA0,
kMkvBlock = 0xA1,
kMkvBlockDuration = 0x9B,
kMkvReferenceBlock = 0xFB,
kMkvLaceNumber = 0xCC,
kMkvSimpleBlock = 0xA3,
kMkvBlockAdditions = 0x75A1,
kMkvBlockMore = 0xA6,
kMkvBlockAddID = 0xEE,
kMkvBlockAdditional = 0xA5,
kMkvDiscardPadding = 0x75A2,
// Track
kMkvTracks = 0x1654AE6B,
kMkvTrackEntry = 0xAE,
kMkvTrackNumber = 0xD7,
kMkvTrackUID = 0x73C5,
kMkvTrackType = 0x83,
kMkvFlagEnabled = 0xB9,
kMkvFlagDefault = 0x88,
kMkvFlagForced = 0x55AA,
kMkvFlagLacing = 0x9C,
kMkvDefaultDuration = 0x23E383,
kMkvMaxBlockAdditionID = 0x55EE,
kMkvName = 0x536E,
kMkvLanguage = 0x22B59C,
kMkvCodecID = 0x86,
kMkvCodecPrivate = 0x63A2,
kMkvCodecName = 0x258688,
kMkvCodecDelay = 0x56AA,
kMkvSeekPreRoll = 0x56BB,
// video
kMkvVideo = 0xE0,
kMkvFlagInterlaced = 0x9A,
kMkvStereoMode = 0x53B8,
kMkvAlphaMode = 0x53C0,
kMkvPixelWidth = 0xB0,
kMkvPixelHeight = 0xBA,
kMkvPixelCropBottom = 0x54AA,
kMkvPixelCropTop = 0x54BB,
kMkvPixelCropLeft = 0x54CC,
kMkvPixelCropRight = 0x54DD,
kMkvDisplayWidth = 0x54B0,
kMkvDisplayHeight = 0x54BA,
kMkvDisplayUnit = 0x54B2,
kMkvAspectRatioType = 0x54B3,
kMkvColourSpace = 0x2EB524,
kMkvFrameRate = 0x2383E3,
// end video
// colour
kMkvColour = 0x55B0,
kMkvMatrixCoefficients = 0x55B1,
kMkvBitsPerChannel = 0x55B2,
kMkvChromaSubsamplingHorz = 0x55B3,
kMkvChromaSubsamplingVert = 0x55B4,
kMkvCbSubsamplingHorz = 0x55B5,
kMkvCbSubsamplingVert = 0x55B6,
kMkvChromaSitingHorz = 0x55B7,
kMkvChromaSitingVert = 0x55B8,
kMkvRange = 0x55B9,
kMkvTransferCharacteristics = 0x55BA,
kMkvPrimaries = 0x55BB,
kMkvMaxCLL = 0x55BC,
kMkvMaxFALL = 0x55BD,
// mastering metadata
kMkvMasteringMetadata = 0x55D0,
kMkvPrimaryRChromaticityX = 0x55D1,
kMkvPrimaryRChromaticityY = 0x55D2,
kMkvPrimaryGChromaticityX = 0x55D3,
kMkvPrimaryGChromaticityY = 0x55D4,
kMkvPrimaryBChromaticityX = 0x55D5,
kMkvPrimaryBChromaticityY = 0x55D6,
kMkvWhitePointChromaticityX = 0x55D7,
kMkvWhitePointChromaticityY = 0x55D8,
kMkvLuminanceMax = 0x55D9,
kMkvLuminanceMin = 0x55DA,
// end mastering metadata
// end colour
// projection
kMkvProjection = 0x7670,
kMkvProjectionType = 0x7671,
kMkvProjectionPrivate = 0x7672,
kMkvProjectionPoseYaw = 0x7673,
kMkvProjectionPosePitch = 0x7674,
kMkvProjectionPoseRoll = 0x7675,
// end projection
// audio
kMkvAudio = 0xE1,
kMkvSamplingFrequency = 0xB5,
kMkvOutputSamplingFrequency = 0x78B5,
kMkvChannels = 0x9F,
kMkvBitDepth = 0x6264,
// end audio
// ContentEncodings
kMkvContentEncodings = 0x6D80,
kMkvContentEncoding = 0x6240,
kMkvContentEncodingOrder = 0x5031,
kMkvContentEncodingScope = 0x5032,
kMkvContentEncodingType = 0x5033,
kMkvContentCompression = 0x5034,
kMkvContentCompAlgo = 0x4254,
kMkvContentCompSettings = 0x4255,
kMkvContentEncryption = 0x5035,
kMkvContentEncAlgo = 0x47E1,
kMkvContentEncKeyID = 0x47E2,
kMkvContentSignature = 0x47E3,
kMkvContentSigKeyID = 0x47E4,
kMkvContentSigAlgo = 0x47E5,
kMkvContentSigHashAlgo = 0x47E6,
kMkvContentEncAESSettings = 0x47E7,
kMkvAESSettingsCipherMode = 0x47E8,
kMkvAESSettingsCipherInitData = 0x47E9,
// end ContentEncodings
// Cueing Data
kMkvCues = 0x1C53BB6B,
kMkvCuePoint = 0xBB,
kMkvCueTime = 0xB3,
kMkvCueTrackPositions = 0xB7,
kMkvCueTrack = 0xF7,
kMkvCueClusterPosition = 0xF1,
kMkvCueBlockNumber = 0x5378,
// Chapters
kMkvChapters = 0x1043A770,
kMkvEditionEntry = 0x45B9,
kMkvChapterAtom = 0xB6,
kMkvChapterUID = 0x73C4,
kMkvChapterStringUID = 0x5654,
kMkvChapterTimeStart = 0x91,
kMkvChapterTimeEnd = 0x92,
kMkvChapterDisplay = 0x80,
kMkvChapString = 0x85,
kMkvChapLanguage = 0x437C,
kMkvChapCountry = 0x437E,
// Tags
kMkvTags = 0x1254C367,
kMkvTag = 0x7373,
kMkvSimpleTag = 0x67C8,
kMkvTagName = 0x45A3,
kMkvTagString = 0x4487
};
} // namespace libwebm
#endif // COMMON_WEBMIDS_H_