diff options
Diffstat (limited to 'chromium/media/webm/tracks_builder.cc')
| -rw-r--r-- | chromium/media/webm/tracks_builder.cc | 216 |
1 files changed, 0 insertions, 216 deletions
diff --git a/chromium/media/webm/tracks_builder.cc b/chromium/media/webm/tracks_builder.cc deleted file mode 100644 index 3ad59530514..00000000000 --- a/chromium/media/webm/tracks_builder.cc +++ /dev/null @@ -1,216 +0,0 @@ -// Copyright (c) 2013 The Chromium Authors. All rights reserved. -// Use of this source code is governed by a BSD-style license that can be -// found in the LICENSE file. - -#include "media/webm/tracks_builder.h" - -#include "media/webm/webm_constants.h" - -namespace media { - -// Returns size of an integer, formatted using Matroska serialization. -static int GetUIntMkvSize(uint64 value) { - if (value < 0x07FULL) - return 1; - if (value < 0x03FFFULL) - return 2; - if (value < 0x01FFFFFULL) - return 3; - if (value < 0x0FFFFFFFULL) - return 4; - if (value < 0x07FFFFFFFFULL) - return 5; - if (value < 0x03FFFFFFFFFFULL) - return 6; - if (value < 0x01FFFFFFFFFFFFULL) - return 7; - return 8; -} - -// Returns the minimium size required to serialize an integer value. -static int GetUIntSize(uint64 value) { - if (value < 0x0100ULL) - return 1; - if (value < 0x010000ULL) - return 2; - if (value < 0x01000000ULL) - return 3; - if (value < 0x0100000000ULL) - return 4; - if (value < 0x010000000000ULL) - return 5; - if (value < 0x01000000000000ULL) - return 6; - if (value < 0x0100000000000000ULL) - return 7; - return 8; -} - -static int MasterElementSize(int element_id, int payload_size) { - return GetUIntSize(element_id) + GetUIntMkvSize(payload_size) + payload_size; -} - -static int IntElementSize(int element_id, int value) { - return GetUIntSize(element_id) + 1 + GetUIntSize(value); -} - -static int StringElementSize(int element_id, const std::string& value) { - return GetUIntSize(element_id) + - GetUIntMkvSize(value.length()) + - value.length(); -} - -static void SerializeInt(uint8** buf_ptr, int* buf_size_ptr, - int64 value, int size) { - uint8*& buf = *buf_ptr; - int& buf_size = *buf_size_ptr; - - for (int idx = 1; idx <= size; ++idx) { - *buf++ = static_cast<uint8>(value >> ((size - idx) * 8)); - --buf_size; - } -} - -static void WriteElementId(uint8** buf, int* buf_size, int element_id) { - SerializeInt(buf, buf_size, element_id, GetUIntSize(element_id)); -} - -static void WriteUInt(uint8** buf, int* buf_size, uint64 value) { - const int size = GetUIntMkvSize(value); - value |= (1ULL << (size * 7)); // Matroska formatting - SerializeInt(buf, buf_size, value, size); -} - -static void WriteMasterElement(uint8** buf, int* buf_size, - int element_id, int payload_size) { - WriteElementId(buf, buf_size, element_id); - WriteUInt(buf, buf_size, payload_size); -} - -static void WriteIntElement(uint8** buf, int* buf_size, - int element_id, int value) { - WriteElementId(buf, buf_size, element_id); - - const int size = GetUIntSize(value); - WriteUInt(buf, buf_size, size); - - SerializeInt(buf, buf_size, value, size); -} - -static void WriteStringElement(uint8** buf_ptr, int* buf_size_ptr, - int element_id, const std::string& value) { - uint8*& buf = *buf_ptr; - int& buf_size = *buf_size_ptr; - - WriteElementId(&buf, &buf_size, element_id); - - const uint64 size = value.length(); - WriteUInt(&buf, &buf_size, size); - - memcpy(buf, value.data(), size); - buf += size; - buf_size -= size; -} - -TracksBuilder::TracksBuilder() {} -TracksBuilder::~TracksBuilder() {} - -void TracksBuilder::AddTrack( - int track_num, - int track_type, - int track_uid, - const std::string& codec_id, - const std::string& name, - const std::string& language) { - tracks_.push_back(Track(track_num, track_type, track_uid, codec_id, name, - language)); -} - -std::vector<uint8> TracksBuilder::Finish() { - // Allocate the storage - std::vector<uint8> buffer; - buffer.resize(GetTracksSize()); - - // Populate the storage with a tracks header - WriteTracks(&buffer[0], buffer.size()); - - return buffer; -} - -int TracksBuilder::GetTracksSize() const { - return MasterElementSize(kWebMIdTracks, GetTracksPayloadSize()); -} - -int TracksBuilder::GetTracksPayloadSize() const { - int payload_size = 0; - - for (TrackList::const_iterator itr = tracks_.begin(); - itr != tracks_.end(); ++itr) { - payload_size += itr->GetSize(); - } - - return payload_size; -} - -void TracksBuilder::WriteTracks(uint8* buf, int buf_size) const { - WriteMasterElement(&buf, &buf_size, kWebMIdTracks, GetTracksPayloadSize()); - - for (TrackList::const_iterator itr = tracks_.begin(); - itr != tracks_.end(); ++itr) { - itr->Write(&buf, &buf_size); - } -} - -TracksBuilder::Track::Track(int track_num, int track_type, int track_uid, - const std::string& codec_id, - const std::string& name, - const std::string& language) - : track_num_(track_num), - track_type_(track_type), - track_uid_(track_uid), - codec_id_(codec_id), - name_(name), - language_(language) { -} - -int TracksBuilder::Track::GetSize() const { - return MasterElementSize(kWebMIdTrackEntry, GetPayloadSize()); -} - -int TracksBuilder::Track::GetPayloadSize() const { - int size = 0; - - size += IntElementSize(kWebMIdTrackNumber, track_num_); - size += IntElementSize(kWebMIdTrackType, track_type_); - size += IntElementSize(kWebMIdTrackUID, track_uid_); - - if (!codec_id_.empty()) - size += StringElementSize(kWebMIdCodecID, codec_id_); - - if (!name_.empty()) - size += StringElementSize(kWebMIdName, name_); - - if (!language_.empty()) - size += StringElementSize(kWebMIdLanguage, language_); - - return size; -} - -void TracksBuilder::Track::Write(uint8** buf, int* buf_size) const { - WriteMasterElement(buf, buf_size, kWebMIdTrackEntry, GetPayloadSize()); - - WriteIntElement(buf, buf_size, kWebMIdTrackNumber, track_num_); - WriteIntElement(buf, buf_size, kWebMIdTrackType, track_type_); - WriteIntElement(buf, buf_size, kWebMIdTrackUID, track_uid_); - - if (!codec_id_.empty()) - WriteStringElement(buf, buf_size, kWebMIdCodecID, codec_id_); - - if (!name_.empty()) - WriteStringElement(buf, buf_size, kWebMIdName, name_); - - if (!language_.empty()) - WriteStringElement(buf, buf_size, kWebMIdLanguage, language_); -} - -} // namespace media |