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< li class = "navelem" > < a class = "el" href = "../../dir_39dc0668bd5a501998f94e8b4e546c71.html" > media< / a > < / li > < li class = "navelem" > < a class = "el" href = "../../dir_65f7acfa8cf3a5f1edc11faa2428b914.html" > formats< / a > < / li > < li class = "navelem" > < a class = "el" href = "../../dir_5039d854a18988ed1f1dbebc120ffbf7.html" > webm< / a > < / li > < / ul >
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< div class = "fragment" > < div class = "line" > < a name = "l00001" > < / a > < span class = "lineno" > 1< / span >   < span class = "comment" > // Copyright 2014 The Chromium Authors. All rights reserved.< / span > < / div >
< div class = "line" > < a name = "l00002" > < / a > < span class = "lineno" > 2< / span >   < span class = "comment" > // Use of this source code is governed by a BSD-style license that can be< / span > < / div >
< div class = "line" > < a name = "l00003" > < / a > < span class = "lineno" > 3< / span >   < span class = "comment" > // found in the LICENSE file.< / span > < / div >
< div class = "line" > < a name = "l00004" > < / a > < span class = "lineno" > 4< / span >   < / div >
< div class = "line" > < a name = "l00005" > < / a > < span class = "lineno" > 5< / span >   < span class = "preprocessor" > #include " packager/media/formats/webm/cluster_builder.h" < / span > < / div >
< div class = "line" > < a name = "l00006" > < / a > < span class = "lineno" > 6< / span >   < / div >
< div class = "line" > < a name = "l00007" > < / a > < span class = "lineno" > 7< / span >   < span class = "preprocessor" > #include " packager/base/logging.h" < / span > < / div >
< div class = "line" > < a name = "l00008" > < / a > < span class = "lineno" > 8< / span >   < span class = "preprocessor" > #include " packager/media/formats/webm/webm_constants.h" < / span > < / div >
< div class = "line" > < a name = "l00009" > < / a > < span class = "lineno" > 9< / span >   < / div >
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< div class = "line" > < a name = "l00010" > < / a > < span class = "lineno" > 10< / span >   < span class = "keyword" > namespace < / span > shaka {< / div >
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< div class = "line" > < a name = "l00011" > < / a > < span class = "lineno" > 11< / span >   < span class = "keyword" > namespace < / span > media {< / div >
< div class = "line" > < a name = "l00012" > < / a > < span class = "lineno" > 12< / span >   < / div >
< div class = "line" > < a name = "l00013" > < / a > < span class = "lineno" > 13< / span >   < span class = "keyword" > static< / span > < span class = "keyword" > const< / span > uint8_t kClusterHeader[] = {< / div >
< div class = "line" > < a name = "l00014" > < / a > < span class = "lineno" > 14< / span >   0x1F, 0x43, 0xB6, 0x75, < span class = "comment" > // CLUSTER ID< / span > < / div >
< div class = "line" > < a name = "l00015" > < / a > < span class = "lineno" > 15< / span >   0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, < span class = "comment" > // cluster(size = 0)< / span > < / div >
< div class = "line" > < a name = "l00016" > < / a > < span class = "lineno" > 16< / span >   0xE7, < span class = "comment" > // Timecode ID< / span > < / div >
< div class = "line" > < a name = "l00017" > < / a > < span class = "lineno" > 17< / span >   0x88, < span class = "comment" > // timecode(size=8)< / span > < / div >
< div class = "line" > < a name = "l00018" > < / a > < span class = "lineno" > 18< / span >   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, < span class = "comment" > // timecode value< / span > < / div >
< div class = "line" > < a name = "l00019" > < / a > < span class = "lineno" > 19< / span >   };< / div >
< div class = "line" > < a name = "l00020" > < / a > < span class = "lineno" > 20< / span >   < / div >
< div class = "line" > < a name = "l00021" > < / a > < span class = "lineno" > 21< / span >   < span class = "keyword" > static< / span > < span class = "keyword" > const< / span > uint8_t kSimpleBlockHeader[] = {< / div >
< div class = "line" > < a name = "l00022" > < / a > < span class = "lineno" > 22< / span >   0xA3, < span class = "comment" > // SimpleBlock ID< / span > < / div >
< div class = "line" > < a name = "l00023" > < / a > < span class = "lineno" > 23< / span >   0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, < span class = "comment" > // SimpleBlock(size = 0)< / span > < / div >
< div class = "line" > < a name = "l00024" > < / a > < span class = "lineno" > 24< / span >   };< / div >
< div class = "line" > < a name = "l00025" > < / a > < span class = "lineno" > 25< / span >   < / div >
< div class = "line" > < a name = "l00026" > < / a > < span class = "lineno" > 26< / span >   < span class = "keyword" > static< / span > < span class = "keyword" > const< / span > uint8_t kBlockGroupHeader[] = {< / div >
< div class = "line" > < a name = "l00027" > < / a > < span class = "lineno" > 27< / span >   0xA0, < span class = "comment" > // BlockGroup ID< / span > < / div >
< div class = "line" > < a name = "l00028" > < / a > < span class = "lineno" > 28< / span >   0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, < span class = "comment" > // BlockGroup(size = 0)< / span > < / div >
< div class = "line" > < a name = "l00029" > < / a > < span class = "lineno" > 29< / span >   0x9B, < span class = "comment" > // BlockDuration ID< / span > < / div >
< div class = "line" > < a name = "l00030" > < / a > < span class = "lineno" > 30< / span >   0x88, < span class = "comment" > // BlockDuration(size = 8)< / span > < / div >
< div class = "line" > < a name = "l00031" > < / a > < span class = "lineno" > 31< / span >   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, < span class = "comment" > // duration< / span > < / div >
< div class = "line" > < a name = "l00032" > < / a > < span class = "lineno" > 32< / span >   0xA1, < span class = "comment" > // Block ID< / span > < / div >
< div class = "line" > < a name = "l00033" > < / a > < span class = "lineno" > 33< / span >   0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, < span class = "comment" > // Block(size = 0)< / span > < / div >
< div class = "line" > < a name = "l00034" > < / a > < span class = "lineno" > 34< / span >   };< / div >
< div class = "line" > < a name = "l00035" > < / a > < span class = "lineno" > 35< / span >   < / div >
< div class = "line" > < a name = "l00036" > < / a > < span class = "lineno" > 36< / span >   < span class = "keyword" > static< / span > < span class = "keyword" > const< / span > uint8_t kBlockGroupHeaderWithoutBlockDuration[] = {< / div >
< div class = "line" > < a name = "l00037" > < / a > < span class = "lineno" > 37< / span >   0xA0, < span class = "comment" > // BlockGroup ID< / span > < / div >
< div class = "line" > < a name = "l00038" > < / a > < span class = "lineno" > 38< / span >   0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, < span class = "comment" > // BlockGroup(size = 0)< / span > < / div >
< div class = "line" > < a name = "l00039" > < / a > < span class = "lineno" > 39< / span >   0xA1, < span class = "comment" > // Block ID< / span > < / div >
< div class = "line" > < a name = "l00040" > < / a > < span class = "lineno" > 40< / span >   0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, < span class = "comment" > // Block(size = 0)< / span > < / div >
< div class = "line" > < a name = "l00041" > < / a > < span class = "lineno" > 41< / span >   };< / div >
< div class = "line" > < a name = "l00042" > < / a > < span class = "lineno" > 42< / span >   < / div >
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< div class = "line" > < a name = "l00043" > < / a > < span class = "lineno" > 43< / span >   < span class = "keyword" > static< / span > < span class = "keyword" > const< / span > uint8_t kBlockGroupReferenceBlock[] = {< / div >
< div class = "line" > < a name = "l00044" > < / a > < span class = "lineno" > 44< / span >   0xFB, < span class = "comment" > // ReferenceBlock ID< / span > < / div >
< div class = "line" > < a name = "l00045" > < / a > < span class = "lineno" > 45< / span >   0x81, 0x00, < span class = "comment" > // ReferenceBlock (size=1, value=0)< / span > < / div >
< div class = "line" > < a name = "l00046" > < / a > < span class = "lineno" > 46< / span >   };< / div >
< div class = "line" > < a name = "l00047" > < / a > < span class = "lineno" > 47< / span >   < / div >
< div class = "line" > < a name = "l00048" > < / a > < span class = "lineno" > 48< / span >   < span class = "keyword" > enum< / span > {< / div >
< div class = "line" > < a name = "l00049" > < / a > < span class = "lineno" > 49< / span >   kClusterSizeOffset = 4,< / div >
< div class = "line" > < a name = "l00050" > < / a > < span class = "lineno" > 50< / span >   kClusterTimecodeOffset = 14,< / div >
< div class = "line" > < a name = "l00051" > < / a > < span class = "lineno" > 51< / span >   < / div >
< div class = "line" > < a name = "l00052" > < / a > < span class = "lineno" > 52< / span >   kSimpleBlockSizeOffset = 1,< / div >
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< div class = "line" > < a name = "l00053" > < / a > < span class = "lineno" > 53< / span >   < / div >
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< div class = "line" > < a name = "l00054" > < / a > < span class = "lineno" > 54< / span >   kBlockGroupSizeOffset = 1,< / div >
< div class = "line" > < a name = "l00055" > < / a > < span class = "lineno" > 55< / span >   kBlockGroupWithoutBlockDurationBlockSizeOffset = 10,< / div >
< div class = "line" > < a name = "l00056" > < / a > < span class = "lineno" > 56< / span >   kBlockGroupDurationOffset = 11,< / div >
< div class = "line" > < a name = "l00057" > < / a > < span class = "lineno" > 57< / span >   kBlockGroupBlockSizeOffset = 20,< / div >
< div class = "line" > < a name = "l00058" > < / a > < span class = "lineno" > 58< / span >   < / div >
< div class = "line" > < a name = "l00059" > < / a > < span class = "lineno" > 59< / span >   kInitialBufferSize = 32768,< / div >
< div class = "line" > < a name = "l00060" > < / a > < span class = "lineno" > 60< / span >   };< / div >
< div class = "line" > < a name = "l00061" > < / a > < span class = "lineno" > 61< / span >   < / div >
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< div class = "line" > < a name = "l00062" > < / a > < span class = "lineno" > 62< / span >   Cluster::Cluster(std::unique_ptr< uint8_t[]> data, < span class = "keywordtype" > int< / span > size)< / div >
< div class = "line" > < a name = "l00063" > < / a > < span class = "lineno" > 63< / span >   : data_(std::move(data)), size_(size) {}< / div >
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< div class = "line" > < a name = "l00064" > < / a > < span class = "lineno" > 64< / span >   Cluster::~Cluster() {}< / div >
< div class = "line" > < a name = "l00065" > < / a > < span class = "lineno" > 65< / span >   < / div >
< div class = "line" > < a name = "l00066" > < / a > < span class = "lineno" > 66< / span >   ClusterBuilder::ClusterBuilder() { Reset(); }< / div >
< div class = "line" > < a name = "l00067" > < / a > < span class = "lineno" > 67< / span >   ClusterBuilder::~ClusterBuilder() {}< / div >
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< div class = "line" > < a name = "l00068" > < / a > < span class = "lineno" > 68< / span >   < / div >
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< div class = "line" > < a name = "l00069" > < / a > < span class = "lineno" > 69< / span >   < span class = "keywordtype" > void< / span > ClusterBuilder::SetClusterTimecode(int64_t cluster_timecode) {< / div >
< div class = "line" > < a name = "l00070" > < / a > < span class = "lineno" > 70< / span >   DCHECK_EQ(cluster_timecode_, -1);< / div >
< div class = "line" > < a name = "l00071" > < / a > < span class = "lineno" > 71< / span >   < / div >
< div class = "line" > < a name = "l00072" > < / a > < span class = "lineno" > 72< / span >   cluster_timecode_ = cluster_timecode;< / div >
< div class = "line" > < a name = "l00073" > < / a > < span class = "lineno" > 73< / span >   < / div >
< div class = "line" > < a name = "l00074" > < / a > < span class = "lineno" > 74< / span >   < span class = "comment" > // Write the timecode into the header.< / span > < / div >
< div class = "line" > < a name = "l00075" > < / a > < span class = "lineno" > 75< / span >   uint8_t* buf = buffer_.get() + kClusterTimecodeOffset;< / div >
< div class = "line" > < a name = "l00076" > < / a > < span class = "lineno" > 76< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 7; i > = 0; --i) {< / div >
< div class = "line" > < a name = "l00077" > < / a > < span class = "lineno" > 77< / span >   buf[i] = cluster_timecode & 0xff;< / div >
< div class = "line" > < a name = "l00078" > < / a > < span class = "lineno" > 78< / span >   cluster_timecode > > = 8;< / div >
< div class = "line" > < a name = "l00079" > < / a > < span class = "lineno" > 79< / span >   }< / div >
< div class = "line" > < a name = "l00080" > < / a > < span class = "lineno" > 80< / span >   }< / div >
< div class = "line" > < a name = "l00081" > < / a > < span class = "lineno" > 81< / span >   < / div >
< div class = "line" > < a name = "l00082" > < / a > < span class = "lineno" > 82< / span >   < span class = "keywordtype" > void< / span > ClusterBuilder::AddSimpleBlock(< span class = "keywordtype" > int< / span > track_num,< / div >
< div class = "line" > < a name = "l00083" > < / a > < span class = "lineno" > 83< / span >   int64_t timecode,< / div >
< div class = "line" > < a name = "l00084" > < / a > < span class = "lineno" > 84< / span >   < span class = "keywordtype" > int< / span > flags,< / div >
< div class = "line" > < a name = "l00085" > < / a > < span class = "lineno" > 85< / span >   < span class = "keyword" > const< / span > uint8_t* data,< / div >
< div class = "line" > < a name = "l00086" > < / a > < span class = "lineno" > 86< / span >   < span class = "keywordtype" > int< / span > size) {< / div >
< div class = "line" > < a name = "l00087" > < / a > < span class = "lineno" > 87< / span >   < span class = "keywordtype" > int< / span > block_size = size + 4;< / div >
< div class = "line" > < a name = "l00088" > < / a > < span class = "lineno" > 88< / span >   < span class = "keywordtype" > int< / span > bytes_needed = < span class = "keyword" > sizeof< / span > (kSimpleBlockHeader) + block_size;< / div >
< div class = "line" > < a name = "l00089" > < / a > < span class = "lineno" > 89< / span >   < span class = "keywordflow" > if< / span > (bytes_needed > (buffer_size_ - bytes_used_))< / div >
< div class = "line" > < a name = "l00090" > < / a > < span class = "lineno" > 90< / span >   ExtendBuffer(bytes_needed);< / div >
< div class = "line" > < a name = "l00091" > < / a > < span class = "lineno" > 91< / span >   < / div >
< div class = "line" > < a name = "l00092" > < / a > < span class = "lineno" > 92< / span >   uint8_t* buf = buffer_.get() + bytes_used_;< / div >
< div class = "line" > < a name = "l00093" > < / a > < span class = "lineno" > 93< / span >   < span class = "keywordtype" > int< / span > block_offset = bytes_used_;< / div >
< div class = "line" > < a name = "l00094" > < / a > < span class = "lineno" > 94< / span >   memcpy(buf, kSimpleBlockHeader, < span class = "keyword" > sizeof< / span > (kSimpleBlockHeader));< / div >
< div class = "line" > < a name = "l00095" > < / a > < span class = "lineno" > 95< / span >   UpdateUInt64(block_offset + kSimpleBlockSizeOffset, block_size);< / div >
< div class = "line" > < a name = "l00096" > < / a > < span class = "lineno" > 96< / span >   buf += < span class = "keyword" > sizeof< / span > (kSimpleBlockHeader);< / div >
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< div class = "line" > < a name = "l00097" > < / a > < span class = "lineno" > 97< / span >   < / div >
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< div class = "line" > < a name = "l00098" > < / a > < span class = "lineno" > 98< / span >   WriteBlock(buf, track_num, timecode, flags, data, size);< / div >
< div class = "line" > < a name = "l00099" > < / a > < span class = "lineno" > 99< / span >   < / div >
< div class = "line" > < a name = "l00100" > < / a > < span class = "lineno" > 100< / span >   bytes_used_ += bytes_needed;< / div >
< div class = "line" > < a name = "l00101" > < / a > < span class = "lineno" > 101< / span >   }< / div >
< div class = "line" > < a name = "l00102" > < / a > < span class = "lineno" > 102< / span >   < / div >
< div class = "line" > < a name = "l00103" > < / a > < span class = "lineno" > 103< / span >   < span class = "keywordtype" > void< / span > ClusterBuilder::AddBlockGroup(< span class = "keywordtype" > int< / span > track_num,< / div >
< div class = "line" > < a name = "l00104" > < / a > < span class = "lineno" > 104< / span >   int64_t timecode,< / div >
< div class = "line" > < a name = "l00105" > < / a > < span class = "lineno" > 105< / span >   < span class = "keywordtype" > int< / span > duration,< / div >
< div class = "line" > < a name = "l00106" > < / a > < span class = "lineno" > 106< / span >   < span class = "keywordtype" > int< / span > flags,< / div >
< div class = "line" > < a name = "l00107" > < / a > < span class = "lineno" > 107< / span >   < span class = "keywordtype" > bool< / span > is_key_frame,< / div >
< div class = "line" > < a name = "l00108" > < / a > < span class = "lineno" > 108< / span >   < span class = "keyword" > const< / span > uint8_t* data,< / div >
< div class = "line" > < a name = "l00109" > < / a > < span class = "lineno" > 109< / span >   < span class = "keywordtype" > int< / span > size) {< / div >
< div class = "line" > < a name = "l00110" > < / a > < span class = "lineno" > 110< / span >   AddBlockGroupInternal(track_num, timecode, < span class = "keyword" > true< / span > , duration, flags,< / div >
< div class = "line" > < a name = "l00111" > < / a > < span class = "lineno" > 111< / span >   is_key_frame, data, size);< / div >
< div class = "line" > < a name = "l00112" > < / a > < span class = "lineno" > 112< / span >   }< / div >
< div class = "line" > < a name = "l00113" > < / a > < span class = "lineno" > 113< / span >   < / div >
< div class = "line" > < a name = "l00114" > < / a > < span class = "lineno" > 114< / span >   < span class = "keywordtype" > void< / span > ClusterBuilder::AddBlockGroupWithoutBlockDuration(< span class = "keywordtype" > int< / span > track_num,< / div >
< div class = "line" > < a name = "l00115" > < / a > < span class = "lineno" > 115< / span >   int64_t timecode,< / div >
< div class = "line" > < a name = "l00116" > < / a > < span class = "lineno" > 116< / span >   < span class = "keywordtype" > int< / span > flags,< / div >
< div class = "line" > < a name = "l00117" > < / a > < span class = "lineno" > 117< / span >   < span class = "keywordtype" > bool< / span > is_key_frame,< / div >
< div class = "line" > < a name = "l00118" > < / a > < span class = "lineno" > 118< / span >   < span class = "keyword" > const< / span > uint8_t* data,< / div >
< div class = "line" > < a name = "l00119" > < / a > < span class = "lineno" > 119< / span >   < span class = "keywordtype" > int< / span > size) {< / div >
< div class = "line" > < a name = "l00120" > < / a > < span class = "lineno" > 120< / span >   AddBlockGroupInternal(track_num, timecode, < span class = "keyword" > false< / span > , 0, flags, is_key_frame,< / div >
< div class = "line" > < a name = "l00121" > < / a > < span class = "lineno" > 121< / span >   data, size);< / div >
< div class = "line" > < a name = "l00122" > < / a > < span class = "lineno" > 122< / span >   }< / div >
< div class = "line" > < a name = "l00123" > < / a > < span class = "lineno" > 123< / span >   < / div >
< div class = "line" > < a name = "l00124" > < / a > < span class = "lineno" > 124< / span >   < span class = "keywordtype" > void< / span > ClusterBuilder::AddBlockGroupInternal(< span class = "keywordtype" > int< / span > track_num,< / div >
< div class = "line" > < a name = "l00125" > < / a > < span class = "lineno" > 125< / span >   int64_t timecode,< / div >
< div class = "line" > < a name = "l00126" > < / a > < span class = "lineno" > 126< / span >   < span class = "keywordtype" > bool< / span > include_block_duration,< / div >
< div class = "line" > < a name = "l00127" > < / a > < span class = "lineno" > 127< / span >   < span class = "keywordtype" > int< / span > duration,< / div >
< div class = "line" > < a name = "l00128" > < / a > < span class = "lineno" > 128< / span >   < span class = "keywordtype" > int< / span > flags,< / div >
< div class = "line" > < a name = "l00129" > < / a > < span class = "lineno" > 129< / span >   < span class = "keywordtype" > bool< / span > is_key_frame,< / div >
< div class = "line" > < a name = "l00130" > < / a > < span class = "lineno" > 130< / span >   < span class = "keyword" > const< / span > uint8_t* data,< / div >
< div class = "line" > < a name = "l00131" > < / a > < span class = "lineno" > 131< / span >   < span class = "keywordtype" > int< / span > size) {< / div >
< div class = "line" > < a name = "l00132" > < / a > < span class = "lineno" > 132< / span >   < span class = "keywordtype" > int< / span > block_size = size + 4;< / div >
< div class = "line" > < a name = "l00133" > < / a > < span class = "lineno" > 133< / span >   < span class = "keywordtype" > int< / span > bytes_needed = block_size;< / div >
< div class = "line" > < a name = "l00134" > < / a > < span class = "lineno" > 134< / span >   < span class = "keywordflow" > if< / span > (include_block_duration) {< / div >
< div class = "line" > < a name = "l00135" > < / a > < span class = "lineno" > 135< / span >   bytes_needed += < span class = "keyword" > sizeof< / span > (kBlockGroupHeader);< / div >
< div class = "line" > < a name = "l00136" > < / a > < span class = "lineno" > 136< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00137" > < / a > < span class = "lineno" > 137< / span >   bytes_needed += < span class = "keyword" > sizeof< / span > (kBlockGroupHeaderWithoutBlockDuration);< / div >
< div class = "line" > < a name = "l00138" > < / a > < span class = "lineno" > 138< / span >   }< / div >
< div class = "line" > < a name = "l00139" > < / a > < span class = "lineno" > 139< / span >   < span class = "keywordflow" > if< / span > (!is_key_frame) {< / div >
< div class = "line" > < a name = "l00140" > < / a > < span class = "lineno" > 140< / span >   bytes_needed += < span class = "keyword" > sizeof< / span > (kBlockGroupReferenceBlock);< / div >
< div class = "line" > < a name = "l00141" > < / a > < span class = "lineno" > 141< / span >   }< / div >
< div class = "line" > < a name = "l00142" > < / a > < span class = "lineno" > 142< / span >   < / div >
< div class = "line" > < a name = "l00143" > < / a > < span class = "lineno" > 143< / span >   < span class = "keywordtype" > int< / span > block_group_size = bytes_needed - 9;< / div >
< div class = "line" > < a name = "l00144" > < / a > < span class = "lineno" > 144< / span >   < / div >
< div class = "line" > < a name = "l00145" > < / a > < span class = "lineno" > 145< / span >   < span class = "keywordflow" > if< / span > (bytes_needed > (buffer_size_ - bytes_used_))< / div >
< div class = "line" > < a name = "l00146" > < / a > < span class = "lineno" > 146< / span >   ExtendBuffer(bytes_needed);< / div >
< div class = "line" > < a name = "l00147" > < / a > < span class = "lineno" > 147< / span >   < / div >
< div class = "line" > < a name = "l00148" > < / a > < span class = "lineno" > 148< / span >   uint8_t* buf = buffer_.get() + bytes_used_;< / div >
< div class = "line" > < a name = "l00149" > < / a > < span class = "lineno" > 149< / span >   < span class = "keywordtype" > int< / span > block_group_offset = bytes_used_;< / div >
< div class = "line" > < a name = "l00150" > < / a > < span class = "lineno" > 150< / span >   < span class = "keywordflow" > if< / span > (include_block_duration) {< / div >
< div class = "line" > < a name = "l00151" > < / a > < span class = "lineno" > 151< / span >   memcpy(buf, kBlockGroupHeader, < span class = "keyword" > sizeof< / span > (kBlockGroupHeader));< / div >
< div class = "line" > < a name = "l00152" > < / a > < span class = "lineno" > 152< / span >   UpdateUInt64(block_group_offset + kBlockGroupDurationOffset, duration);< / div >
< div class = "line" > < a name = "l00153" > < / a > < span class = "lineno" > 153< / span >   UpdateUInt64(block_group_offset + kBlockGroupBlockSizeOffset, block_size);< / div >
< div class = "line" > < a name = "l00154" > < / a > < span class = "lineno" > 154< / span >   buf += < span class = "keyword" > sizeof< / span > (kBlockGroupHeader);< / div >
< div class = "line" > < a name = "l00155" > < / a > < span class = "lineno" > 155< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00156" > < / a > < span class = "lineno" > 156< / span >   memcpy(buf, kBlockGroupHeaderWithoutBlockDuration,< / div >
< div class = "line" > < a name = "l00157" > < / a > < span class = "lineno" > 157< / span >   < span class = "keyword" > sizeof< / span > (kBlockGroupHeaderWithoutBlockDuration));< / div >
< div class = "line" > < a name = "l00158" > < / a > < span class = "lineno" > 158< / span >   UpdateUInt64(< / div >
< div class = "line" > < a name = "l00159" > < / a > < span class = "lineno" > 159< / span >   block_group_offset + kBlockGroupWithoutBlockDurationBlockSizeOffset,< / div >
< div class = "line" > < a name = "l00160" > < / a > < span class = "lineno" > 160< / span >   block_size);< / div >
< div class = "line" > < a name = "l00161" > < / a > < span class = "lineno" > 161< / span >   buf += < span class = "keyword" > sizeof< / span > (kBlockGroupHeaderWithoutBlockDuration);< / div >
< div class = "line" > < a name = "l00162" > < / a > < span class = "lineno" > 162< / span >   }< / div >
< div class = "line" > < a name = "l00163" > < / a > < span class = "lineno" > 163< / span >   < / div >
< div class = "line" > < a name = "l00164" > < / a > < span class = "lineno" > 164< / span >   UpdateUInt64(block_group_offset + kBlockGroupSizeOffset, block_group_size);< / div >
< div class = "line" > < a name = "l00165" > < / a > < span class = "lineno" > 165< / span >   < / div >
< div class = "line" > < a name = "l00166" > < / a > < span class = "lineno" > 166< / span >   < span class = "comment" > // Make sure the 4 most-significant bits are 0.< / span > < / div >
< div class = "line" > < a name = "l00167" > < / a > < span class = "lineno" > 167< / span >   < span class = "comment" > // http://www.matroska.org/technical/specs/index.html#block_structure< / span > < / div >
< div class = "line" > < a name = "l00168" > < / a > < span class = "lineno" > 168< / span >   flags & = 0x0f;< / div >
< div class = "line" > < a name = "l00169" > < / a > < span class = "lineno" > 169< / span >   < / div >
< div class = "line" > < a name = "l00170" > < / a > < span class = "lineno" > 170< / span >   WriteBlock(buf, track_num, timecode, flags, data, size);< / div >
< div class = "line" > < a name = "l00171" > < / a > < span class = "lineno" > 171< / span >   buf += size + 4;< / div >
< div class = "line" > < a name = "l00172" > < / a > < span class = "lineno" > 172< / span >   < / div >
< div class = "line" > < a name = "l00173" > < / a > < span class = "lineno" > 173< / span >   < span class = "keywordflow" > if< / span > (!is_key_frame)< / div >
< div class = "line" > < a name = "l00174" > < / a > < span class = "lineno" > 174< / span >   memcpy(buf, kBlockGroupReferenceBlock, < span class = "keyword" > sizeof< / span > (kBlockGroupReferenceBlock));< / div >
< div class = "line" > < a name = "l00175" > < / a > < span class = "lineno" > 175< / span >   bytes_used_ += bytes_needed;< / div >
< div class = "line" > < a name = "l00176" > < / a > < span class = "lineno" > 176< / span >   }< / div >
< div class = "line" > < a name = "l00177" > < / a > < span class = "lineno" > 177< / span >   < / div >
< div class = "line" > < a name = "l00178" > < / a > < span class = "lineno" > 178< / span >   < span class = "keywordtype" > void< / span > ClusterBuilder::WriteBlock(uint8_t* buf,< / div >
< div class = "line" > < a name = "l00179" > < / a > < span class = "lineno" > 179< / span >   < span class = "keywordtype" > int< / span > track_num,< / div >
< div class = "line" > < a name = "l00180" > < / a > < span class = "lineno" > 180< / span >   int64_t timecode,< / div >
< div class = "line" > < a name = "l00181" > < / a > < span class = "lineno" > 181< / span >   < span class = "keywordtype" > int< / span > flags,< / div >
< div class = "line" > < a name = "l00182" > < / a > < span class = "lineno" > 182< / span >   < span class = "keyword" > const< / span > uint8_t* data,< / div >
< div class = "line" > < a name = "l00183" > < / a > < span class = "lineno" > 183< / span >   < span class = "keywordtype" > int< / span > size) {< / div >
< div class = "line" > < a name = "l00184" > < / a > < span class = "lineno" > 184< / span >   DCHECK_GE(track_num, 0);< / div >
< div class = "line" > < a name = "l00185" > < / a > < span class = "lineno" > 185< / span >   DCHECK_LE(track_num, 126);< / div >
< div class = "line" > < a name = "l00186" > < / a > < span class = "lineno" > 186< / span >   DCHECK_GE(flags, 0);< / div >
< div class = "line" > < a name = "l00187" > < / a > < span class = "lineno" > 187< / span >   DCHECK_LE(flags, 0xff);< / div >
< div class = "line" > < a name = "l00188" > < / a > < span class = "lineno" > 188< / span >   DCHECK(data);< / div >
< div class = "line" > < a name = "l00189" > < / a > < span class = "lineno" > 189< / span >   DCHECK_GT(size, 0);< / div >
< div class = "line" > < a name = "l00190" > < / a > < span class = "lineno" > 190< / span >   DCHECK_NE(cluster_timecode_, -1);< / div >
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< div class = "line" > < a name = "l00191" > < / a > < span class = "lineno" > 191< / span >   < / div >
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< div class = "line" > < a name = "l00192" > < / a > < span class = "lineno" > 192< / span >   int64_t timecode_delta = timecode - cluster_timecode_;< / div >
< div class = "line" > < a name = "l00193" > < / a > < span class = "lineno" > 193< / span >   DCHECK_GE(timecode_delta, -32768);< / div >
< div class = "line" > < a name = "l00194" > < / a > < span class = "lineno" > 194< / span >   DCHECK_LE(timecode_delta, 32767);< / div >
< div class = "line" > < a name = "l00195" > < / a > < span class = "lineno" > 195< / span >   < / div >
< div class = "line" > < a name = "l00196" > < / a > < span class = "lineno" > 196< / span >   buf[0] = 0x80 | (track_num & 0x7F);< / div >
< div class = "line" > < a name = "l00197" > < / a > < span class = "lineno" > 197< / span >   buf[1] = (timecode_delta > > 8) & 0xff;< / div >
< div class = "line" > < a name = "l00198" > < / a > < span class = "lineno" > 198< / span >   buf[2] = timecode_delta & 0xff;< / div >
< div class = "line" > < a name = "l00199" > < / a > < span class = "lineno" > 199< / span >   buf[3] = flags & 0xff;< / div >
< div class = "line" > < a name = "l00200" > < / a > < span class = "lineno" > 200< / span >   memcpy(buf + 4, data, size);< / div >
< div class = "line" > < a name = "l00201" > < / a > < span class = "lineno" > 201< / span >   }< / div >
< div class = "line" > < a name = "l00202" > < / a > < span class = "lineno" > 202< / span >   < / div >
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< div class = "line" > < a name = "l00203" > < / a > < span class = "lineno" > 203< / span >   std::unique_ptr< Cluster> ClusterBuilder::Finish() {< / div >
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< div class = "line" > < a name = "l00204" > < / a > < span class = "lineno" > 204< / span >   DCHECK_NE(cluster_timecode_, -1);< / div >
< div class = "line" > < a name = "l00205" > < / a > < span class = "lineno" > 205< / span >   < / div >
< div class = "line" > < a name = "l00206" > < / a > < span class = "lineno" > 206< / span >   UpdateUInt64(kClusterSizeOffset, bytes_used_ - (kClusterSizeOffset + 8));< / div >
< div class = "line" > < a name = "l00207" > < / a > < span class = "lineno" > 207< / span >   < / div >
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< div class = "line" > < a name = "l00208" > < / a > < span class = "lineno" > 208< / span >   std::unique_ptr< Cluster> ret(< span class = "keyword" > new< / span > Cluster(std::move(buffer_), bytes_used_));< / div >
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< div class = "line" > < a name = "l00209" > < / a > < span class = "lineno" > 209< / span >   Reset();< / div >
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< div class = "line" > < a name = "l00210" > < / a > < span class = "lineno" > 210< / span >   < span class = "keywordflow" > return< / span > ret;< / div >
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< div class = "line" > < a name = "l00211" > < / a > < span class = "lineno" > 211< / span >   }< / div >
< div class = "line" > < a name = "l00212" > < / a > < span class = "lineno" > 212< / span >   < / div >
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< div class = "line" > < a name = "l00213" > < / a > < span class = "lineno" > 213< / span >   std::unique_ptr< Cluster> ClusterBuilder::FinishWithUnknownSize() {< / div >
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< div class = "line" > < a name = "l00214" > < / a > < span class = "lineno" > 214< / span >   DCHECK_NE(cluster_timecode_, -1);< / div >
< div class = "line" > < a name = "l00215" > < / a > < span class = "lineno" > 215< / span >   < / div >
< div class = "line" > < a name = "l00216" > < / a > < span class = "lineno" > 216< / span >   UpdateUInt64(kClusterSizeOffset, kWebMUnknownSize);< / div >
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< div class = "line" > < a name = "l00217" > < / a > < span class = "lineno" > 217< / span >   < / div >
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< div class = "line" > < a name = "l00218" > < / a > < span class = "lineno" > 218< / span >   std::unique_ptr< Cluster> ret(< span class = "keyword" > new< / span > Cluster(std::move(buffer_), bytes_used_));< / div >
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< div class = "line" > < a name = "l00219" > < / a > < span class = "lineno" > 219< / span >   Reset();< / div >
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< div class = "line" > < a name = "l00220" > < / a > < span class = "lineno" > 220< / span >   < span class = "keywordflow" > return< / span > ret;< / div >
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< div class = "line" > < a name = "l00221" > < / a > < span class = "lineno" > 221< / span >   }< / div >
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< div class = "line" > < a name = "l00222" > < / a > < span class = "lineno" > 222< / span >   < / div >
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< div class = "line" > < a name = "l00223" > < / a > < span class = "lineno" > 223< / span >   < span class = "keywordtype" > void< / span > ClusterBuilder::Reset() {< / div >
< div class = "line" > < a name = "l00224" > < / a > < span class = "lineno" > 224< / span >   buffer_size_ = kInitialBufferSize;< / div >
< div class = "line" > < a name = "l00225" > < / a > < span class = "lineno" > 225< / span >   buffer_.reset(< span class = "keyword" > new< / span > uint8_t[buffer_size_]);< / div >
< div class = "line" > < a name = "l00226" > < / a > < span class = "lineno" > 226< / span >   memcpy(buffer_.get(), kClusterHeader, < span class = "keyword" > sizeof< / span > (kClusterHeader));< / div >
< div class = "line" > < a name = "l00227" > < / a > < span class = "lineno" > 227< / span >   bytes_used_ = < span class = "keyword" > sizeof< / span > (kClusterHeader);< / div >
< div class = "line" > < a name = "l00228" > < / a > < span class = "lineno" > 228< / span >   cluster_timecode_ = -1;< / div >
< div class = "line" > < a name = "l00229" > < / a > < span class = "lineno" > 229< / span >   }< / div >
< div class = "line" > < a name = "l00230" > < / a > < span class = "lineno" > 230< / span >   < / div >
< div class = "line" > < a name = "l00231" > < / a > < span class = "lineno" > 231< / span >   < span class = "keywordtype" > void< / span > ClusterBuilder::ExtendBuffer(< span class = "keywordtype" > int< / span > bytes_needed) {< / div >
< div class = "line" > < a name = "l00232" > < / a > < span class = "lineno" > 232< / span >   < span class = "keywordtype" > int< / span > new_buffer_size = 2 * buffer_size_;< / div >
< div class = "line" > < a name = "l00233" > < / a > < span class = "lineno" > 233< / span >   < / div >
< div class = "line" > < a name = "l00234" > < / a > < span class = "lineno" > 234< / span >   < span class = "keywordflow" > while< / span > ((new_buffer_size - bytes_used_) < bytes_needed)< / div >
< div class = "line" > < a name = "l00235" > < / a > < span class = "lineno" > 235< / span >   new_buffer_size *= 2;< / div >
< div class = "line" > < a name = "l00236" > < / a > < span class = "lineno" > 236< / span >   < / div >
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< div class = "line" > < a name = "l00237" > < / a > < span class = "lineno" > 237< / span >   std::unique_ptr< uint8_t[]> new_buffer(< span class = "keyword" > new< / span > uint8_t[new_buffer_size]);< / div >
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< div class = "line" > < a name = "l00238" > < / a > < span class = "lineno" > 238< / span >   < / div >
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< div class = "line" > < a name = "l00239" > < / a > < span class = "lineno" > 239< / span >   memcpy(new_buffer.get(), buffer_.get(), bytes_used_);< / div >
< div class = "line" > < a name = "l00240" > < / a > < span class = "lineno" > 240< / span >   buffer_.reset(new_buffer.release());< / div >
< div class = "line" > < a name = "l00241" > < / a > < span class = "lineno" > 241< / span >   buffer_size_ = new_buffer_size;< / div >
< div class = "line" > < a name = "l00242" > < / a > < span class = "lineno" > 242< / span >   }< / div >
< div class = "line" > < a name = "l00243" > < / a > < span class = "lineno" > 243< / span >   < / div >
< div class = "line" > < a name = "l00244" > < / a > < span class = "lineno" > 244< / span >   < span class = "keywordtype" > void< / span > ClusterBuilder::UpdateUInt64(< span class = "keywordtype" > int< / span > offset, int64_t value) {< / div >
< div class = "line" > < a name = "l00245" > < / a > < span class = "lineno" > 245< / span >   DCHECK_LE(offset + 7, buffer_size_);< / div >
< div class = "line" > < a name = "l00246" > < / a > < span class = "lineno" > 246< / span >   uint8_t* buf = buffer_.get() + offset;< / div >
< div class = "line" > < a name = "l00247" > < / a > < span class = "lineno" > 247< / span >   < / div >
< div class = "line" > < a name = "l00248" > < / a > < span class = "lineno" > 248< / span >   < span class = "comment" > // Fill the last 7 bytes of size field in big-endian order.< / span > < / div >
< div class = "line" > < a name = "l00249" > < / a > < span class = "lineno" > 249< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 7; i > 0; i--) {< / div >
< div class = "line" > < a name = "l00250" > < / a > < span class = "lineno" > 250< / span >   buf[i] = value & 0xff;< / div >
< div class = "line" > < a name = "l00251" > < / a > < span class = "lineno" > 251< / span >   value > > = 8;< / div >
< div class = "line" > < a name = "l00252" > < / a > < span class = "lineno" > 252< / span >   }< / div >
< div class = "line" > < a name = "l00253" > < / a > < span class = "lineno" > 253< / span >   }< / div >
< div class = "line" > < a name = "l00254" > < / a > < span class = "lineno" > 254< / span >   < / div >
< div class = "line" > < a name = "l00255" > < / a > < span class = "lineno" > 255< / span >   } < span class = "comment" > // namespace media< / span > < / div >
< div class = "line" > < a name = "l00256" > < / a > < span class = "lineno" > 256< / span >   } < span class = "comment" > // namespace shaka< / span > < / div >
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< / div > <!-- fragment --> < / div > <!-- contents -->
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< img class = "footer" src = "../../doxygen.png" alt = "doxygen" / >
< / a > 1.8.6
< / small > < / address >
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