Adding libwebm sources to third_party/libwebm.

Hash and license details are found in README.webm

Change-Id: I52192abe8eba8ec413f6bccd479e8e2256a8f617
This commit is contained in:
Vignesh Venkatasubramanian 2014-03-17 13:30:55 -07:00
parent bf4e4e36a3
commit 5bdecc4864
17 changed files with 16790 additions and 0 deletions

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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)
"This implementation" means the copyrightable works 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 this
implementation of VP8, 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 this
implementation of VP8. This grant does not include claims that would be
infringed only as a consequence of further modification of this
implementation. If you or your agent or exclusive licensee institute or
order or agree to the institution of patent litigation against any
entity (including a cross-claim or counterclaim in a lawsuit) alleging
that this implementation of VP8 or any code incorporated within this
implementation of VP8 constitutes direct or contributory patent
infringement, or inducement of patent infringement, then any patent
rights granted to you under this License for this implementation of VP8
shall terminate as of the date such litigation is filed.

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URL: https://chromium.googlesource.com/webm/libwebm
Version: 630a0e3c338e1b32bddf513a2dad807908d2976a
License: BSD
License File: LICENSE.txt
Description:
libwebm is used to handle WebM container I/O.

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1.0.0.5
* Handled case when no duration
* Handled empty clusters
* Handled empty clusters when seeking
* Implemented check lacing bits
1.0.0.4
* Made Cues member variables mutables
* Defined against badly-formatted cue points
* Segment::GetCluster returns CuePoint too
* Separated cue-based searches
1.0.0.3
* Added Block::GetOffset() to get a frame's offset in a block
* Changed cluster count type from size_t to long
* Parsed SeekHead to find cues
* Allowed seeking beyond end of cluster cache
* Added not to attempt to reparse cues element
* Restructured Segment::LoadCluster
* Marked position of cues without parsing cues element
* Allowed cue points to be loaded incrementally
* Implemented to load lazily cue points as they're searched
* Merged Cues::LoadCuePoint into Cues::Find
* Lazy init cues
* Loaded cue point during find
1.0.0.2
* added support for Cues element
* seeking was improved
1.0.0.1
* fixed item 141
* added item 142
* added this file, RELEASE.TXT, to repository

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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 MKVMUXERTYPES_HPP
#define MKVMUXERTYPES_HPP
// Copied from Chromium basictypes.h
// A macro to disallow the copy constructor and operator= functions
// This should be used in the private: declarations for a class
#define LIBWEBM_DISALLOW_COPY_AND_ASSIGN(TypeName) \
TypeName(const TypeName&); \
void operator=(const TypeName&)
namespace mkvmuxer {
typedef unsigned char uint8;
typedef short int16;
typedef int int32;
typedef unsigned int uint32;
typedef long long int64;
typedef unsigned long long uint64;
} //end namespace mkvmuxer
#endif // MKVMUXERTYPES_HPP

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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.
#include "mkvmuxerutil.hpp"
#ifdef __ANDROID__
#include <fcntl.h>
#endif
#include <cassert>
#include <cmath>
#include <cstdio>
#ifdef _MSC_VER
#define _CRT_RAND_S
#endif
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <new>
#include "mkvwriter.hpp"
#include "webmids.hpp"
namespace mkvmuxer {
int32 GetCodedUIntSize(uint64 value) {
if (value < 0x000000000000007FULL)
return 1;
else if (value < 0x0000000000003FFFULL)
return 2;
else if (value < 0x00000000001FFFFFULL)
return 3;
else if (value < 0x000000000FFFFFFFULL)
return 4;
else if (value < 0x00000007FFFFFFFFULL)
return 5;
else if (value < 0x000003FFFFFFFFFFULL)
return 6;
else if (value < 0x0001FFFFFFFFFFFFULL)
return 7;
return 8;
}
int32 GetUIntSize(uint64 value) {
if (value < 0x0000000000000100ULL)
return 1;
else if (value < 0x0000000000010000ULL)
return 2;
else if (value < 0x0000000001000000ULL)
return 3;
else if (value < 0x0000000100000000ULL)
return 4;
else if (value < 0x0000010000000000ULL)
return 5;
else if (value < 0x0001000000000000ULL)
return 6;
else if (value < 0x0100000000000000ULL)
return 7;
return 8;
}
uint64 EbmlMasterElementSize(uint64 type, uint64 value) {
// Size of EBML ID
int32 ebml_size = GetUIntSize(type);
// Datasize
ebml_size += GetCodedUIntSize(value);
return ebml_size;
}
uint64 EbmlElementSize(uint64 type, int64 value) {
return EbmlElementSize(type, static_cast<uint64>(value));
}
uint64 EbmlElementSize(uint64 type, uint64 value) {
// Size of EBML ID
int32 ebml_size = GetUIntSize(type);
// Datasize
ebml_size += GetUIntSize(value);
// Size of Datasize
ebml_size++;
return ebml_size;
}
uint64 EbmlElementSize(uint64 type, float /* value */ ) {
// Size of EBML ID
uint64 ebml_size = GetUIntSize(type);
// Datasize
ebml_size += sizeof(float);
// Size of Datasize
ebml_size++;
return ebml_size;
}
uint64 EbmlElementSize(uint64 type, const char* value) {
if (!value)
return 0;
// Size of EBML ID
uint64 ebml_size = GetUIntSize(type);
// Datasize
ebml_size += strlen(value);
// Size of Datasize
ebml_size++;
return ebml_size;
}
uint64 EbmlElementSize(uint64 type, const uint8* value, uint64 size) {
if (!value)
return 0;
// Size of EBML ID
uint64 ebml_size = GetUIntSize(type);
// Datasize
ebml_size += size;
// Size of Datasize
ebml_size += GetCodedUIntSize(size);
return ebml_size;
}
int32 SerializeInt(IMkvWriter* writer, int64 value, int32 size) {
if (!writer || size < 1 || size > 8)
return -1;
for (int32 i = 1; i <= size; ++i) {
const int32 byte_count = size - i;
const int32 bit_count = byte_count * 8;
const int64 bb = value >> bit_count;
const uint8 b = static_cast<uint8>(bb);
const int32 status = writer->Write(&b, 1);
if (status < 0)
return status;
}
return 0;
}
int32 SerializeFloat(IMkvWriter* writer, float f) {
if (!writer)
return -1;
assert(sizeof(uint32) == sizeof(float));
// This union is merely used to avoid a reinterpret_cast from float& to
// uint32& which will result in violation of strict aliasing.
union U32 {
uint32 u32;
float f;
} value;
value.f = f;
for (int32 i = 1; i <= 4; ++i) {
const int32 byte_count = 4 - i;
const int32 bit_count = byte_count * 8;
const uint8 byte = static_cast<uint8>(value.u32 >> bit_count);
const int32 status = writer->Write(&byte, 1);
if (status < 0)
return status;
}
return 0;
}
int32 WriteUInt(IMkvWriter* writer, uint64 value) {
if (!writer)
return -1;
int32 size = GetCodedUIntSize(value);
return WriteUIntSize(writer, value, size);
}
int32 WriteUIntSize(IMkvWriter* writer, uint64 value, int32 size) {
if (!writer || size < 0 || size > 8)
return -1;
if (size > 0) {
const uint64 bit = 1LL << (size * 7);
if (value > (bit - 2))
return -1;
value |= bit;
} else {
size = 1;
int64 bit;
for (;;) {
bit = 1LL << (size * 7);
const uint64 max = bit - 2;
if (value <= max)
break;
++size;
}
if (size > 8)
return false;
value |= bit;
}
return SerializeInt(writer, value, size);
}
int32 WriteID(IMkvWriter* writer, uint64 type) {
if (!writer)
return -1;
writer->ElementStartNotify(type, writer->Position());
const int32 size = GetUIntSize(type);
return SerializeInt(writer, type, size);
}
bool WriteEbmlMasterElement(IMkvWriter* writer, uint64 type, uint64 size) {
if (!writer)
return false;
if (WriteID(writer, type))
return false;
if (WriteUInt(writer, size))
return false;
return true;
}
bool WriteEbmlElement(IMkvWriter* writer, uint64 type, uint64 value) {
if (!writer)
return false;
if (WriteID(writer, type))
return false;
const uint64 size = GetUIntSize(value);
if (WriteUInt(writer, size))
return false;
if (SerializeInt(writer, value, static_cast<int32>(size)))
return false;
return true;
}
bool WriteEbmlElement(IMkvWriter* writer, uint64 type, float value) {
if (!writer)
return false;
if (WriteID(writer, type))
return false;
if (WriteUInt(writer, 4))
return false;
if (SerializeFloat(writer, value))
return false;
return true;
}
bool WriteEbmlElement(IMkvWriter* writer, uint64 type, const char* value) {
if (!writer || !value)
return false;
if (WriteID(writer, type))
return false;
const int32 length = strlen(value);
if (WriteUInt(writer, length))
return false;
if (writer->Write(value, length))
return false;
return true;
}
bool WriteEbmlElement(IMkvWriter* writer,
uint64 type,
const uint8* value,
uint64 size) {
if (!writer || !value || size < 1)
return false;
if (WriteID(writer, type))
return false;
if (WriteUInt(writer, size))
return false;
if (writer->Write(value, static_cast<uint32>(size)))
return false;
return true;
}
uint64 WriteSimpleBlock(IMkvWriter* writer,
const uint8* data,
uint64 length,
uint64 track_number,
int64 timecode,
uint64 is_key) {
if (!writer)
return false;
if (!data || length < 1)
return false;
// Here we only permit track number values to be no greater than
// 126, which the largest value we can store having a Matroska
// integer representation of only 1 byte.
if (track_number < 1 || track_number > 126)
return false;
// Technically the timestamp for a block can be less than the
// timestamp for the cluster itself (remember that block timestamp
// is a signed, 16-bit integer). However, as a simplification we
// only permit non-negative cluster-relative timestamps for blocks.
if (timecode < 0 || timecode > kMaxBlockTimecode)
return false;
if (WriteID(writer, kMkvSimpleBlock))
return 0;
const int32 size = static_cast<int32>(length) + 4;
if (WriteUInt(writer, size))
return 0;
if (WriteUInt(writer, static_cast<uint64>(track_number)))
return 0;
if (SerializeInt(writer, timecode, 2))
return 0;
uint64 flags = 0;
if (is_key)
flags |= 0x80;
if (SerializeInt(writer, flags, 1))
return 0;
if (writer->Write(data, static_cast<uint32>(length)))
return 0;
const uint64 element_size =
GetUIntSize(kMkvSimpleBlock) + GetCodedUIntSize(size) + 4 + length;
return element_size;
}
// We must write the metadata (key)frame as a BlockGroup element,
// because we need to specify a duration for the frame. The
// BlockGroup element comprises the frame itself and its duration,
// and is laid out as follows:
//
// BlockGroup tag
// BlockGroup size
// Block tag
// Block size
// (the frame is the block payload)
// Duration tag
// Duration size
// (duration payload)
//
uint64 WriteMetadataBlock(IMkvWriter* writer,
const uint8* data,
uint64 length,
uint64 track_number,
int64 timecode,
uint64 duration) {
// We don't backtrack when writing to the stream, so we must
// pre-compute the BlockGroup size, by summing the sizes of each
// sub-element (the block and the duration).
// We use a single byte for the track number of the block, which
// means the block header is exactly 4 bytes.
// TODO(matthewjheaney): use EbmlMasterElementSize and WriteEbmlMasterElement
const uint64 block_payload_size = 4 + length;
const int32 block_size = GetCodedUIntSize(block_payload_size);
const uint64 block_elem_size = 1 + block_size + block_payload_size;
const int32 duration_payload_size = GetUIntSize(duration);
const int32 duration_size = GetCodedUIntSize(duration_payload_size);
const uint64 duration_elem_size = 1 + duration_size + duration_payload_size;
const uint64 blockg_payload_size = block_elem_size + duration_elem_size;
const int32 blockg_size = GetCodedUIntSize(blockg_payload_size);
const uint64 blockg_elem_size = 1 + blockg_size + blockg_payload_size;
if (WriteID(writer, kMkvBlockGroup)) // 1-byte ID size
return 0;
if (WriteUInt(writer, blockg_payload_size))
return 0;
// Write Block element
if (WriteID(writer, kMkvBlock)) // 1-byte ID size
return 0;
if (WriteUInt(writer, block_payload_size))
return 0;
// Byte 1 of 4
if (WriteUInt(writer, track_number))
return 0;
// Bytes 2 & 3 of 4
if (SerializeInt(writer, timecode, 2))
return 0;
// Byte 4 of 4
const uint64 flags = 0;
if (SerializeInt(writer, flags, 1))
return 0;
// Now write the actual frame (of metadata)
if (writer->Write(data, static_cast<uint32>(length)))
return 0;
// Write Duration element
if (WriteID(writer, kMkvBlockDuration)) // 1-byte ID size
return 0;
if (WriteUInt(writer, duration_payload_size))
return 0;
if (SerializeInt(writer, duration, duration_payload_size))
return 0;
// Note that we don't write a reference time as part of the block
// group; no reference time(s) indicates that this block is a
// keyframe. (Unlike the case for a SimpleBlock element, the header
// bits of the Block sub-element of a BlockGroup element do not
// indicate keyframe status. The keyframe status is inferred from
// the absence of reference time sub-elements.)
return blockg_elem_size;
}
// Writes a WebM BlockGroup with BlockAdditional data. The structure is as
// follows:
// Indentation shows sub-levels
// BlockGroup
// Block
// Data
// BlockAdditions
// BlockMore
// BlockAddID
// 1 (Denotes Alpha)
// BlockAdditional
// Data
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) {
if (!data || !additional || length < 1 || additional_length < 1)
return 0;
const uint64 block_payload_size = 4 + length;
const uint64 block_elem_size = EbmlMasterElementSize(kMkvBlock,
block_payload_size) +
block_payload_size;
const uint64 block_additional_elem_size = EbmlElementSize(kMkvBlockAdditional,
additional,
additional_length);
const uint64 block_addid_elem_size = EbmlElementSize(kMkvBlockAddID, add_id);
const uint64 block_more_payload_size = block_addid_elem_size +
block_additional_elem_size;
const uint64 block_more_elem_size = EbmlMasterElementSize(
kMkvBlockMore,
block_more_payload_size) +
block_more_payload_size;
const uint64 block_additions_payload_size = block_more_elem_size;
const uint64 block_additions_elem_size = EbmlMasterElementSize(
kMkvBlockAdditions,
block_additions_payload_size) +
block_additions_payload_size;
const uint64 block_group_payload_size = block_elem_size +
block_additions_elem_size;
const uint64 block_group_elem_size = EbmlMasterElementSize(
kMkvBlockGroup,
block_group_payload_size) +
block_group_payload_size;
if (!WriteEbmlMasterElement(writer, kMkvBlockGroup,
block_group_payload_size))
return 0;
if (!WriteEbmlMasterElement(writer, kMkvBlock, block_payload_size))
return 0;
if (WriteUInt(writer, track_number))
return 0;
if (SerializeInt(writer, timecode, 2))
return 0;
uint64 flags = 0;
if (is_key)
flags |= 0x80;
if (SerializeInt(writer, flags, 1))
return 0;
if (writer->Write(data, static_cast<uint32>(length)))
return 0;
if (!WriteEbmlMasterElement(writer, kMkvBlockAdditions,
block_additions_payload_size))
return 0;
if (!WriteEbmlMasterElement(writer, kMkvBlockMore, block_more_payload_size))
return 0;
if (!WriteEbmlElement(writer, kMkvBlockAddID, add_id))
return 0;
if (!WriteEbmlElement(writer, kMkvBlockAdditional,
additional, additional_length))
return 0;
return block_group_elem_size;
}
// Writes a WebM BlockGroup with DiscardPadding. The structure is as follows:
// Indentation shows sub-levels
// BlockGroup
// Block
// Data
// DiscardPadding
uint64 WriteBlockWithDiscardPadding(IMkvWriter* writer,
const uint8* data,
uint64 length,
int64 discard_padding,
uint64 track_number,
int64 timecode,
uint64 is_key) {
if (!data || length < 1 || discard_padding <= 0)
return 0;
const uint64 block_payload_size = 4 + length;
const uint64 block_elem_size = EbmlMasterElementSize(kMkvBlock,
block_payload_size) +
block_payload_size;
const uint64 discard_padding_elem_size = EbmlElementSize(kMkvDiscardPadding,
discard_padding);
const uint64 block_group_payload_size = block_elem_size +
discard_padding_elem_size;
const uint64 block_group_elem_size = EbmlMasterElementSize(
kMkvBlockGroup,
block_group_payload_size) +
block_group_payload_size;
if (!WriteEbmlMasterElement(writer, kMkvBlockGroup,
block_group_payload_size))
return 0;
if (!WriteEbmlMasterElement(writer, kMkvBlock, block_payload_size))
return 0;
if (WriteUInt(writer, track_number))
return 0;
if (SerializeInt(writer, timecode, 2))
return 0;
uint64 flags = 0;
if (is_key)
flags |= 0x80;
if (SerializeInt(writer, flags, 1))
return 0;
if (writer->Write(data, static_cast<uint32>(length)))
return 0;
if (WriteID(writer, kMkvDiscardPadding))
return 0;
const uint64 size = GetUIntSize(discard_padding);
if (WriteUInt(writer, size))
return false;
if (SerializeInt(writer, discard_padding, static_cast<int32>(size)))
return false;
return block_group_elem_size;
}
uint64 WriteVoidElement(IMkvWriter* writer, uint64 size) {
if (!writer)
return false;
// Subtract one for the void ID and the coded size.
uint64 void_entry_size = size - 1 - GetCodedUIntSize(size-1);
uint64 void_size = EbmlMasterElementSize(kMkvVoid, void_entry_size) +
void_entry_size;
if (void_size != size)
return 0;
const int64 payload_position = writer->Position();
if (payload_position < 0)
return 0;
if (WriteID(writer, kMkvVoid))
return 0;
if (WriteUInt(writer, void_entry_size))
return 0;
const uint8 value = 0;
for (int32 i = 0; i < static_cast<int32>(void_entry_size); ++i) {
if (writer->Write(&value, 1))
return 0;
}
const int64 stop_position = writer->Position();
if (stop_position < 0 ||
stop_position - payload_position != static_cast<int64>(void_size))
return 0;
return void_size;
}
void GetVersion(int32* major, int32* minor, int32* build, int32* revision) {
*major = 0;
*minor = 2;
*build = 1;
*revision = 0;
}
} // namespace mkvmuxer
mkvmuxer::uint64 mkvmuxer::MakeUID(unsigned int* seed) {
uint64 uid = 0;
#ifdef __MINGW32__
srand(*seed);
#endif
for (int i = 0; i < 7; ++i) { // avoid problems with 8-byte values
uid <<= 8;
// TODO(fgalligan): Move random number generation to platform specific code.
#ifdef _MSC_VER
(void)seed;
unsigned int random_value;
const errno_t e = rand_s(&random_value);
(void)e;
const int32 nn = random_value;
#elif __ANDROID__
int32 temp_num = 1;
int fd = open("/dev/urandom", O_RDONLY);
if (fd != -1) {
read(fd, &temp_num, sizeof(int32));
close(fd);
}
const int32 nn = temp_num;
#elif defined __MINGW32__
const int32 nn = rand();
#else
const int32 nn = rand_r(seed);
#endif
const int32 n = 0xFF & (nn >> 4); // throw away low-order bits
uid |= n;
}
return uid;
}

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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 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);
// 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 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

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// Copyright (c) 2010 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.
#include "mkvreader.hpp"
#include <cassert>
namespace mkvparser
{
MkvReader::MkvReader() :
m_file(NULL)
{
}
MkvReader::~MkvReader()
{
Close();
}
int MkvReader::Open(const char* fileName)
{
if (fileName == NULL)
return -1;
if (m_file)
return -1;
#ifdef _MSC_VER
const errno_t e = fopen_s(&m_file, fileName, "rb");
if (e)
return -1; //error
#else
m_file = fopen(fileName, "rb");
if (m_file == NULL)
return -1;
#endif
#ifdef _MSC_VER
int status = _fseeki64(m_file, 0L, SEEK_END);
if (status)
return -1; //error
m_length = _ftelli64(m_file);
#else
fseek(m_file, 0L, SEEK_END);
m_length = ftell(m_file);
#endif
assert(m_length >= 0);
#ifdef _MSC_VER
status = _fseeki64(m_file, 0L, SEEK_SET);
if (status)
return -1; //error
#else
fseek(m_file, 0L, SEEK_SET);
#endif
return 0;
}
void MkvReader::Close()
{
if (m_file != NULL)
{
fclose(m_file);
m_file = NULL;
}
}
int MkvReader::Length(long long* total, long long* available)
{
if (m_file == NULL)
return -1;
if (total)
*total = m_length;
if (available)
*available = m_length;
return 0;
}
int MkvReader::Read(long long offset, long len, unsigned char* buffer)
{
if (m_file == NULL)
return -1;
if (offset < 0)
return -1;
if (len < 0)
return -1;
if (len == 0)
return 0;
if (offset >= m_length)
return -1;
#ifdef _MSC_VER
const int status = _fseeki64(m_file, offset, SEEK_SET);
if (status)
return -1; //error
#else
fseek(m_file, offset, SEEK_SET);
#endif
const size_t size = fread(buffer, 1, len, m_file);
if (size < size_t(len))
return -1; //error
return 0; //success
}
} //end namespace mkvparser

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// Copyright (c) 2010 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 MKVREADER_HPP
#define MKVREADER_HPP
#include "mkvparser.hpp"
#include <cstdio>
namespace mkvparser
{
class MkvReader : public IMkvReader
{
MkvReader(const MkvReader&);
MkvReader& operator=(const MkvReader&);
public:
MkvReader();
virtual ~MkvReader();
int Open(const char*);
void Close();
virtual int Read(long long position, long length, unsigned char* buffer);
virtual int Length(long long* total, long long* available);
private:
long long m_length;
FILE* m_file;
};
} //end namespace mkvparser
#endif //MKVREADER_HPP

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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.
#include "mkvwriter.hpp"
#ifdef _MSC_VER
#include <share.h> // for _SH_DENYWR
#endif
#include <new>
namespace mkvmuxer {
MkvWriter::MkvWriter() : file_(NULL), writer_owns_file_(true) {
}
MkvWriter::MkvWriter(FILE* fp): file_(fp), writer_owns_file_(false) {
}
MkvWriter::~MkvWriter() {
Close();
}
int32 MkvWriter::Write(const void* buffer, uint32 length) {
if (!file_)
return -1;
if (length == 0)
return 0;
if (buffer == NULL)
return -1;
const size_t bytes_written = fwrite(buffer, 1, length, file_);
return (bytes_written == length) ? 0 : -1;
}
bool MkvWriter::Open(const char* filename) {
if (filename == NULL)
return false;
if (file_)
return false;
#ifdef _MSC_VER
file_ = _fsopen(filename, "wb", _SH_DENYWR);
#else
file_ = fopen(filename, "wb");
#endif
if (file_ == NULL)
return false;
return true;
}
void MkvWriter::Close() {
if (file_ && writer_owns_file_) {
fclose(file_);
}
file_ = NULL;
}
int64 MkvWriter::Position() const {
if (!file_)
return 0;
#ifdef _MSC_VER
return _ftelli64(file_);
#else
return ftell(file_);
#endif
}
int32 MkvWriter::Position(int64 position) {
if (!file_)
return -1;
#ifdef _MSC_VER
return _fseeki64(file_, position, SEEK_SET);
#else
return fseek(file_, position, SEEK_SET);
#endif
}
bool MkvWriter::Seekable() const {
return true;
}
void MkvWriter::ElementStartNotify(uint64, int64) {
}
} // namespace mkvmuxer

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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 MKVWRITER_HPP
#define MKVWRITER_HPP
#include <stdio.h>
#include "mkvmuxer.hpp"
#include "mkvmuxertypes.hpp"
namespace mkvmuxer {
// Default implementation of the IMkvWriter interface on Windows.
class MkvWriter : public IMkvWriter {
public:
MkvWriter();
MkvWriter(FILE* fp);
virtual ~MkvWriter();
// IMkvWriter interface
virtual int64 Position() const;
virtual int32 Position(int64 position);
virtual bool Seekable() const;
virtual int32 Write(const void* buffer, uint32 length);
virtual void ElementStartNotify(uint64 element_id, int64 position);
// Creates and opens a file for writing. |filename| is the name of the file
// to open. This function will overwrite the contents of |filename|. Returns
// true on success.
bool Open(const char* filename);
// Closes an opened file.
void Close();
private:
// File handle to output file.
FILE* file_;
bool writer_owns_file_;
LIBWEBM_DISALLOW_COPY_AND_ASSIGN(MkvWriter);
};
} //end namespace mkvmuxer
#endif // MKVWRITER_HPP

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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 WEBMIDS_HPP
#define WEBMIDS_HPP
namespace mkvmuxer {
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,
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,
kMkvFrameRate = 0x2383E3,
//end video
//audio
kMkvAudio = 0xE1,
kMkvSamplingFrequency = 0xB5,
kMkvOutputSamplingFrequency = 0x78B5,
kMkvChannels = 0x9F,
kMkvBitDepth = 0x6264,
//end audio
//ContentEncodings
kMkvContentEncodings = 0x6D80,
kMkvContentEncoding = 0x6240,
kMkvContentEncodingOrder = 0x5031,
kMkvContentEncodingScope = 0x5032,
kMkvContentEncodingType = 0x5033,
kMkvContentEncryption = 0x5035,
kMkvContentEncAlgo = 0x47E1,
kMkvContentEncKeyID = 0x47E2,
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
};
} // end namespace mkvmuxer
#endif // WEBMIDS_HPP