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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_c6ada2450b25ab5438a4dba6c9b890af.html" > base< / a > < / li > < / ul >
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< div class = "title" > buffer_reader.cc< / div > < / div >
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< div class = "fragment" > < div class = "line" > < a name = "l00001" > < / a > < span class = "lineno" > 1< / span >   < span class = "comment" > // Copyright 2014 Google Inc. All rights reserved.< / span > < / div >
< div class = "line" > < a name = "l00002" > < / a > < span class = "lineno" > 2< / span >   < span class = "comment" > //< / span > < / div >
< div class = "line" > < a name = "l00003" > < / a > < span class = "lineno" > 3< / span >   < span class = "comment" > // Use of this source code is governed by a BSD-style< / span > < / div >
< div class = "line" > < a name = "l00004" > < / a > < span class = "lineno" > 4< / span >   < span class = "comment" > // license that can be found in the LICENSE file or at< / span > < / div >
< div class = "line" > < a name = "l00005" > < / a > < span class = "lineno" > 5< / span >   < span class = "comment" > // https://developers.google.com/open-source/licenses/bsd< / 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/media/base/buffer_reader.h" < / span > < / div >
< div class = "line" > < a name = "l00008" > < / a > < span class = "lineno" > 8< / span >   < / div >
< div class = "line" > < a name = "l00009" > < / a > < span class = "lineno" > 9< / span >   < span class = "preprocessor" > #include " packager/base/logging.h" < / span > < / div >
< div class = "line" > < a name = "l00010" > < / a > < span class = "lineno" > 10< / span >   < / div >
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< div class = "line" > < a name = "l00011" > < / a > < span class = "lineno" > 11< / span >   < span class = "keyword" > namespace < / span > shaka {< / div >
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< div class = "line" > < a name = "l00012" > < / a > < span class = "lineno" > 12< / span >   < span class = "keyword" > namespace < / span > media {< / div >
< div class = "line" > < a name = "l00013" > < / a > < span class = "lineno" > 13< / span >   < / div >
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< div class = "line" > < a name = "l00014" > < / a > < span class = "lineno" > < a class = "line" href = "../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a65b65ad5a5ebc9d66182c38ec9876c05" > 14< / a > < / span >   < span class = "keywordtype" > bool< / span > < a class = "code" href = "../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a65b65ad5a5ebc9d66182c38ec9876c05" > BufferReader::Read1< / a > (uint8_t* v) {< / div >
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< div class = "line" > < a name = "l00015" > < / a > < span class = "lineno" > 15< / span >   DCHECK(v != NULL);< / div >
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< div class = "line" > < a name = "l00016" > < / a > < span class = "lineno" > 16< / span >   < span class = "keywordflow" > if< / span > (!< a class = "code" href = "../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a208f2fda9ea3e79583284c951642c356" > HasBytes< / a > (1))< / div >
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< div class = "line" > < a name = "l00017" > < / a > < span class = "lineno" > 17< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00018" > < / a > < span class = "lineno" > 18< / span >   *v = buf_[pos_++];< / div >
< div class = "line" > < a name = "l00019" > < / a > < span class = "lineno" > 19< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / 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 >   < / div >
< div class = "line" > < a name = "l00022" > < / a > < span class = "lineno" > 22< / span >   < span class = "keywordtype" > bool< / span > BufferReader::Read2(uint16_t* v) {< / div >
< div class = "line" > < a name = "l00023" > < / a > < span class = "lineno" > 23< / span >   < span class = "keywordflow" > return< / span > Read(v);< / 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 >   < span class = "keywordtype" > bool< / span > BufferReader::Read2s(int16_t* v) {< / div >
< div class = "line" > < a name = "l00026" > < / a > < span class = "lineno" > 26< / span >   < span class = "keywordflow" > return< / span > Read(v);< / div >
< div class = "line" > < a name = "l00027" > < / a > < span class = "lineno" > 27< / span >   }< / div >
< div class = "line" > < a name = "l00028" > < / a > < span class = "lineno" > 28< / span >   < span class = "keywordtype" > bool< / span > BufferReader::Read4(uint32_t* v) {< / div >
< div class = "line" > < a name = "l00029" > < / a > < span class = "lineno" > 29< / span >   < span class = "keywordflow" > return< / span > Read(v);< / div >
< div class = "line" > < a name = "l00030" > < / a > < span class = "lineno" > 30< / span >   }< / div >
< div class = "line" > < a name = "l00031" > < / a > < span class = "lineno" > 31< / span >   < span class = "keywordtype" > bool< / span > BufferReader::Read4s(int32_t* v) {< / div >
< div class = "line" > < a name = "l00032" > < / a > < span class = "lineno" > 32< / span >   < span class = "keywordflow" > return< / span > Read(v);< / div >
< div class = "line" > < a name = "l00033" > < / a > < span class = "lineno" > 33< / span >   }< / div >
< div class = "line" > < a name = "l00034" > < / a > < span class = "lineno" > 34< / span >   < span class = "keywordtype" > bool< / span > BufferReader::Read8(uint64_t* v) {< / div >
< div class = "line" > < a name = "l00035" > < / a > < span class = "lineno" > 35< / span >   < span class = "keywordflow" > return< / span > Read(v);< / div >
< div class = "line" > < a name = "l00036" > < / a > < span class = "lineno" > 36< / span >   }< / div >
< div class = "line" > < a name = "l00037" > < / a > < span class = "lineno" > 37< / span >   < span class = "keywordtype" > bool< / span > BufferReader::Read8s(int64_t* v) {< / div >
< div class = "line" > < a name = "l00038" > < / a > < span class = "lineno" > 38< / span >   < span class = "keywordflow" > return< / span > Read(v);< / div >
< div class = "line" > < a name = "l00039" > < / a > < span class = "lineno" > 39< / span >   }< / div >
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< div class = "line" > < a name = "l00040" > < / a > < span class = "lineno" > < a class = "line" href = "../../d9/d13/classshaka_1_1media_1_1BufferReader.html#ac98c6631c07300a6b78ec58bfd4ced30" > 40< / a > < / span >   < span class = "keywordtype" > bool< / span > < a class = "code" href = "../../d9/d13/classshaka_1_1media_1_1BufferReader.html#ac98c6631c07300a6b78ec58bfd4ced30" > BufferReader::ReadNBytesInto8< / a > (uint64_t* v, < span class = "keywordtype" > size_t< / span > num_bytes) {< / div >
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< div class = "line" > < a name = "l00041" > < / a > < span class = "lineno" > 41< / span >   < span class = "keywordflow" > return< / span > ReadNBytes(v, num_bytes);< / div >
< div class = "line" > < a name = "l00042" > < / a > < span class = "lineno" > 42< / span >   }< / div >
< div class = "line" > < a name = "l00043" > < / a > < span class = "lineno" > 43< / span >   < span class = "keywordtype" > bool< / span > BufferReader::ReadNBytesInto8s(int64_t* v, < span class = "keywordtype" > size_t< / span > num_bytes) {< / div >
< div class = "line" > < a name = "l00044" > < / a > < span class = "lineno" > 44< / span >   < span class = "keywordflow" > return< / span > ReadNBytes(v, num_bytes);< / div >
< div class = "line" > < a name = "l00045" > < / a > < span class = "lineno" > 45< / 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 >   < span class = "keywordtype" > bool< / span > BufferReader::ReadToVector(std::vector< uint8_t> * vec, < span class = "keywordtype" > size_t< / span > count) {< / div >
< div class = "line" > < a name = "l00048" > < / a > < span class = "lineno" > 48< / span >   DCHECK(vec != NULL);< / div >
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< div class = "line" > < a name = "l00049" > < / a > < span class = "lineno" > 49< / span >   < span class = "keywordflow" > if< / span > (!< a class = "code" href = "../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a208f2fda9ea3e79583284c951642c356" > HasBytes< / a > (count))< / div >
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< div class = "line" > < a name = "l00050" > < / a > < span class = "lineno" > 50< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00051" > < / a > < span class = "lineno" > 51< / span >   vec-> assign(buf_ + pos_, buf_ + pos_ + count);< / div >
< div class = "line" > < a name = "l00052" > < / a > < span class = "lineno" > 52< / span >   pos_ += count;< / div >
< div class = "line" > < a name = "l00053" > < / a > < span class = "lineno" > 53< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00054" > < / a > < span class = "lineno" > 54< / span >   }< / div >
< div class = "line" > < a name = "l00055" > < / a > < span class = "lineno" > 55< / span >   < / div >
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< div class = "line" > < a name = "l00056" > < / a > < span class = "lineno" > 56< / span >   < span class = "keywordtype" > bool< / span > BufferReader::ReadToString(std::string* str, < span class = "keywordtype" > size_t< / span > size) {< / div >
< div class = "line" > < a name = "l00057" > < / a > < span class = "lineno" > 57< / span >   DCHECK(str);< / div >
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< div class = "line" > < a name = "l00058" > < / a > < span class = "lineno" > 58< / span >   < span class = "keywordflow" > if< / span > (!< a class = "code" href = "../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a208f2fda9ea3e79583284c951642c356" > HasBytes< / a > (size))< / div >
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< div class = "line" > < a name = "l00059" > < / a > < span class = "lineno" > 59< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00060" > < / a > < span class = "lineno" > 60< / span >   str-> assign(buf_ + pos_, buf_ + pos_ + size);< / div >
< div class = "line" > < a name = "l00061" > < / a > < span class = "lineno" > 61< / span >   pos_ += size;< / div >
< div class = "line" > < a name = "l00062" > < / a > < span class = "lineno" > 62< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00063" > < / a > < span class = "lineno" > 63< / span >   }< / div >
< div class = "line" > < a name = "l00064" > < / a > < span class = "lineno" > 64< / span >   < / div >
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< div class = "line" > < a name = "l00065" > < / a > < span class = "lineno" > < a class = "line" href = "../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a2b15dfcd6ff891a9cb7b76f48d91d15d" > 65< / a > < / span >   < span class = "keywordtype" > bool< / span > < a class = "code" href = "../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a2b15dfcd6ff891a9cb7b76f48d91d15d" > BufferReader::SkipBytes< / a > (< span class = "keywordtype" > size_t< / span > num_bytes) {< / div >
< div class = "line" > < a name = "l00066" > < / a > < span class = "lineno" > 66< / span >   < span class = "keywordflow" > if< / span > (!< a class = "code" href = "../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a208f2fda9ea3e79583284c951642c356" > HasBytes< / a > (num_bytes))< / div >
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< div class = "line" > < a name = "l00067" > < / a > < span class = "lineno" > 67< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00068" > < / a > < span class = "lineno" > 68< / span >   pos_ += num_bytes;< / div >
< div class = "line" > < a name = "l00069" > < / a > < span class = "lineno" > 69< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00070" > < / a > < span class = "lineno" > 70< / span >   }< / 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 >   < span class = "keyword" > template< / span > < < span class = "keyword" > typename< / span > T> < / div >
< div class = "line" > < a name = "l00073" > < / a > < span class = "lineno" > 73< / span >   < span class = "keywordtype" > bool< / span > BufferReader::Read(T* v) {< / div >
< div class = "line" > < a name = "l00074" > < / a > < span class = "lineno" > 74< / span >   < span class = "keywordflow" > return< / span > ReadNBytes(v, < span class = "keyword" > sizeof< / span > (*v));< / div >
< div class = "line" > < a name = "l00075" > < / a > < span class = "lineno" > 75< / span >   }< / div >
< div class = "line" > < a name = "l00076" > < / a > < span class = "lineno" > 76< / span >   < / div >
< div class = "line" > < a name = "l00077" > < / a > < span class = "lineno" > 77< / span >   < span class = "keyword" > template< / span > < < span class = "keyword" > typename< / span > T> < / div >
< div class = "line" > < a name = "l00078" > < / a > < span class = "lineno" > 78< / span >   < span class = "keywordtype" > bool< / span > BufferReader::ReadNBytes(T* v, < span class = "keywordtype" > size_t< / span > num_bytes) {< / div >
< div class = "line" > < a name = "l00079" > < / a > < span class = "lineno" > 79< / span >   DCHECK(v != NULL);< / div >
< div class = "line" > < a name = "l00080" > < / a > < span class = "lineno" > 80< / span >   DCHECK_LE(num_bytes, < span class = "keyword" > sizeof< / span > (*v));< / div >
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< div class = "line" > < a name = "l00081" > < / a > < span class = "lineno" > 81< / span >   < span class = "keywordflow" > if< / span > (!< a class = "code" href = "../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a208f2fda9ea3e79583284c951642c356" > HasBytes< / a > (num_bytes))< / div >
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< div class = "line" > < a name = "l00082" > < / a > < span class = "lineno" > 82< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00083" > < / a > < span class = "lineno" > 83< / span >   < / div >
< div class = "line" > < a name = "l00084" > < / a > < span class = "lineno" > 84< / span >   < span class = "comment" > // Sign extension is required only if< / span > < / div >
< div class = "line" > < a name = "l00085" > < / a > < span class = "lineno" > 85< / span >   < span class = "comment" > // |num_bytes| is less than size of T, and< / span > < / div >
< div class = "line" > < a name = "l00086" > < / a > < span class = "lineno" > 86< / span >   < span class = "comment" > // T is a signed type.< / span > < / div >
< div class = "line" > < a name = "l00087" > < / a > < span class = "lineno" > 87< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > bool< / span > sign_extension_required =< / div >
< div class = "line" > < a name = "l00088" > < / a > < span class = "lineno" > 88< / span >   num_bytes < sizeof(*v) & & static_cast< T> (-1) < 0;< / div >
< div class = "line" > < a name = "l00089" > < / a > < span class = "lineno" > 89< / span >   < span class = "comment" > // Perform sign extension by casting the byte value to int8_t, which will be< / span > < / div >
< div class = "line" > < a name = "l00090" > < / a > < span class = "lineno" > 90< / span >   < span class = "comment" > // sign extended automatically when it is implicitly converted to T.< / span > < / div >
< div class = "line" > < a name = "l00091" > < / a > < span class = "lineno" > 91< / span >   T tmp = sign_extension_required ? < span class = "keyword" > static_cast< < / span > int8_t< span class = "keyword" > > < / span > (buf_[pos_++])< / div >
< div class = "line" > < a name = "l00092" > < / a > < span class = "lineno" > 92< / span >   : buf_[pos_++];< / div >
< div class = "line" > < a name = "l00093" > < / a > < span class = "lineno" > 93< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 1; i < num_bytes; ++i) {< / div >
< div class = "line" > < a name = "l00094" > < / a > < span class = "lineno" > 94< / span >   tmp < < = 8;< / div >
< div class = "line" > < a name = "l00095" > < / a > < span class = "lineno" > 95< / span >   tmp |= buf_[pos_++];< / div >
< div class = "line" > < a name = "l00096" > < / a > < span class = "lineno" > 96< / span >   }< / div >
< div class = "line" > < a name = "l00097" > < / a > < span class = "lineno" > 97< / span >   *v = tmp;< / div >
< div class = "line" > < a name = "l00098" > < / a > < span class = "lineno" > 98< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / 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 >   < / div >
< div class = "line" > < a name = "l00101" > < / a > < span class = "lineno" > 101< / span >   } < span class = "comment" > // namespace media< / span > < / div >
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< div class = "line" > < a name = "l00102" > < / a > < span class = "lineno" > 102< / span >   } < span class = "comment" > // namespace shaka< / span > < / div >
< div class = "ttc" id = "classshaka_1_1media_1_1BufferReader_html_ac98c6631c07300a6b78ec58bfd4ced30" > < div class = "ttname" > < a href = "../../d9/d13/classshaka_1_1media_1_1BufferReader.html#ac98c6631c07300a6b78ec58bfd4ced30" > shaka::media::BufferReader::ReadNBytesInto8< / a > < / div > < div class = "ttdeci" > bool ReadNBytesInto8(uint64_t *v, size_t num_bytes) WARN_UNUSED_RESULT< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../dd/dbc/buffer__reader_8cc_source.html#l00040" > buffer_reader.cc:40< / a > < / div > < / div >
< div class = "ttc" id = "classshaka_1_1media_1_1BufferReader_html_a208f2fda9ea3e79583284c951642c356" > < div class = "ttname" > < a href = "../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a208f2fda9ea3e79583284c951642c356" > shaka::media::BufferReader::HasBytes< / a > < / div > < div class = "ttdeci" > bool HasBytes(size_t count)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../de/d3e/buffer__reader_8h_source.html#l00032" > buffer_reader.h:32< / a > < / div > < / div >
< div class = "ttc" id = "classshaka_1_1media_1_1BufferReader_html_a65b65ad5a5ebc9d66182c38ec9876c05" > < div class = "ttname" > < a href = "../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a65b65ad5a5ebc9d66182c38ec9876c05" > shaka::media::BufferReader::Read1< / a > < / div > < div class = "ttdeci" > bool Read1(uint8_t *v) WARN_UNUSED_RESULT< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../dd/dbc/buffer__reader_8cc_source.html#l00014" > buffer_reader.cc:14< / a > < / div > < / div >
< div class = "ttc" id = "classshaka_1_1media_1_1BufferReader_html_a2b15dfcd6ff891a9cb7b76f48d91d15d" > < div class = "ttname" > < a href = "../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a2b15dfcd6ff891a9cb7b76f48d91d15d" > shaka::media::BufferReader::SkipBytes< / a > < / div > < div class = "ttdeci" > bool SkipBytes(size_t num_bytes) WARN_UNUSED_RESULT< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../dd/dbc/buffer__reader_8cc_source.html#l00065" > buffer_reader.cc:65< / a > < / div > < / div >
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