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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">offset_byte_queue.cc</div> </div>
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<div class="contents">
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright (c) 2012 The Chromium Authors. All rights reserved.</span></div>
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<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>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// found in the LICENSE file.</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> </div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#include "packager/media/base/offset_byte_queue.h"</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> </div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include <stdint.h></span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> </div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include "packager/base/logging.h"</span></div>
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<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>edash_packager {</div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="keyword">namespace </span>media {</div>
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<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"> 14</span> OffsetByteQueue::OffsetByteQueue() : buf_(NULL), size_(0), head_(0) {}</div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> OffsetByteQueue::~OffsetByteQueue() {}</div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="keywordtype">void</span> OffsetByteQueue::Reset() {</div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  queue_.<a class="code" href="../../d8/d2e/classedash__packager_1_1media_1_1ByteQueue.html#a452485879d303d5c8654e1b184bc1235">Reset</a>();</div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  buf_ = NULL;</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  size_ = 0;</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  head_ = 0;</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> }</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="keywordtype">void</span> OffsetByteQueue::Push(<span class="keyword">const</span> uint8_t* buf, <span class="keywordtype">int</span> size) {</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  queue_.<a class="code" href="../../d8/d2e/classedash__packager_1_1media_1_1ByteQueue.html#afa47d3dc54862cee101d4be8746de6eb">Push</a>(buf, size);</div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  Sync();</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  DVLOG(4) << <span class="stringliteral">"Buffer pushed. head="</span> << <a class="code" href="../../d1/d92/classedash__packager_1_1media_1_1OffsetByteQueue.html#aa9d018636705cab1759978cd7c6d17da">head</a>() << <span class="stringliteral">" tail="</span> << <a class="code" href="../../d1/d92/classedash__packager_1_1media_1_1OffsetByteQueue.html#add7aef56ce4f162c047ad7fcf64cf603">tail</a>();</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> }</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="keywordtype">void</span> OffsetByteQueue::Peek(<span class="keyword">const</span> uint8_t** buf, <span class="keywordtype">int</span>* size) {</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  *buf = size_ > 0 ? buf_ : NULL;</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  *size = size_;</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> }</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="keywordtype">void</span> OffsetByteQueue::Pop(<span class="keywordtype">int</span> count) {</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  queue_.<a class="code" href="../../d8/d2e/classedash__packager_1_1media_1_1ByteQueue.html#acac5c7874703c86ba77a50d3be0671d2">Pop</a>(count);</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  head_ += count;</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  Sync();</div>
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<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"> 40</span> </div>
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<div class="line"><a name="l00041"></a><span class="lineno"><a class="line" href="../../d1/d92/classedash__packager_1_1media_1_1OffsetByteQueue.html#a32b06f514ebfd5aef820a9b91228a854"> 41</a></span> <span class="keywordtype">void</span> <a class="code" href="../../d1/d92/classedash__packager_1_1media_1_1OffsetByteQueue.html#a32b06f514ebfd5aef820a9b91228a854">OffsetByteQueue::PeekAt</a>(int64_t offset, <span class="keyword">const</span> uint8_t** buf, <span class="keywordtype">int</span>* size) {</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keywordflow">if</span> (offset < <a class="code" href="../../d1/d92/classedash__packager_1_1media_1_1OffsetByteQueue.html#aa9d018636705cab1759978cd7c6d17da">head</a>() || offset >= <a class="code" href="../../d1/d92/classedash__packager_1_1media_1_1OffsetByteQueue.html#add7aef56ce4f162c047ad7fcf64cf603">tail</a>()) {</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  *buf = NULL;</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  *size = 0;</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keywordflow">return</span>;</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  }</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  *buf = &buf_[offset - <a class="code" href="../../d1/d92/classedash__packager_1_1media_1_1OffsetByteQueue.html#aa9d018636705cab1759978cd7c6d17da">head</a>()];</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  *size = <a class="code" href="../../d1/d92/classedash__packager_1_1media_1_1OffsetByteQueue.html#add7aef56ce4f162c047ad7fcf64cf603">tail</a>() - offset;</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> }</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div>
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<div class="line"><a name="l00051"></a><span class="lineno"><a class="line" href="../../d1/d92/classedash__packager_1_1media_1_1OffsetByteQueue.html#af2a41afe5b213be301b7b9f7ca555fae"> 51</a></span> <span class="keywordtype">bool</span> <a class="code" href="../../d1/d92/classedash__packager_1_1media_1_1OffsetByteQueue.html#af2a41afe5b213be301b7b9f7ca555fae">OffsetByteQueue::Trim</a>(int64_t max_offset) {</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordflow">if</span> (max_offset < head_) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">if</span> (max_offset > <a class="code" href="../../d1/d92/classedash__packager_1_1media_1_1OffsetByteQueue.html#add7aef56ce4f162c047ad7fcf64cf603">tail</a>()) {</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  Pop(size_);</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  }</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  Pop(max_offset - head_);</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> }</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="keywordtype">void</span> OffsetByteQueue::Sync() {</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  queue_.<a class="code" href="../../d8/d2e/classedash__packager_1_1media_1_1ByteQueue.html#a8253df160751462f3b75290a7c525e56">Peek</a>(&buf_, &size_);</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> }</div>
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<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"> 65</span> } <span class="comment">// namespace media</span></div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> } <span class="comment">// namespace edash_packager</span></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1OffsetByteQueue_html_af2a41afe5b213be301b7b9f7ca555fae"><div class="ttname"><a href="../../d1/d92/classedash__packager_1_1media_1_1OffsetByteQueue.html#af2a41afe5b213be301b7b9f7ca555fae">edash_packager::media::OffsetByteQueue::Trim</a></div><div class="ttdeci">bool Trim(int64_t max_offset)</div><div class="ttdef"><b>Definition:</b> <a href="../../df/d1a/offset__byte__queue_8cc_source.html#l00051">offset_byte_queue.cc:51</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1ByteQueue_html_afa47d3dc54862cee101d4be8746de6eb"><div class="ttname"><a href="../../d8/d2e/classedash__packager_1_1media_1_1ByteQueue.html#afa47d3dc54862cee101d4be8746de6eb">edash_packager::media::ByteQueue::Push</a></div><div class="ttdeci">void Push(const uint8_t *data, int size)</div><div class="ttdoc">Append new bytes to the end of the queue. </div><div class="ttdef"><b>Definition:</b> <a href="../../d7/df9/byte__queue_8cc_source.html#l00029">byte_queue.cc:29</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1ByteQueue_html_acac5c7874703c86ba77a50d3be0671d2"><div class="ttname"><a href="../../d8/d2e/classedash__packager_1_1media_1_1ByteQueue.html#acac5c7874703c86ba77a50d3be0671d2">edash_packager::media::ByteQueue::Pop</a></div><div class="ttdeci">void Pop(int count)</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/df9/byte__queue_8cc_source.html#l00070">byte_queue.cc:70</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1OffsetByteQueue_html_a32b06f514ebfd5aef820a9b91228a854"><div class="ttname"><a href="../../d1/d92/classedash__packager_1_1media_1_1OffsetByteQueue.html#a32b06f514ebfd5aef820a9b91228a854">edash_packager::media::OffsetByteQueue::PeekAt</a></div><div class="ttdeci">void PeekAt(int64_t offset, const uint8_t **buf, int *size)</div><div class="ttdef"><b>Definition:</b> <a href="../../df/d1a/offset__byte__queue_8cc_source.html#l00041">offset_byte_queue.cc:41</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1OffsetByteQueue_html_aa9d018636705cab1759978cd7c6d17da"><div class="ttname"><a href="../../d1/d92/classedash__packager_1_1media_1_1OffsetByteQueue.html#aa9d018636705cab1759978cd7c6d17da">edash_packager::media::OffsetByteQueue::head</a></div><div class="ttdeci">int64_t head()</div><div class="ttdef"><b>Definition:</b> <a href="../../de/d34/offset__byte__queue_8h_source.html#l00052">offset_byte_queue.h:52</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1OffsetByteQueue_html_add7aef56ce4f162c047ad7fcf64cf603"><div class="ttname"><a href="../../d1/d92/classedash__packager_1_1media_1_1OffsetByteQueue.html#add7aef56ce4f162c047ad7fcf64cf603">edash_packager::media::OffsetByteQueue::tail</a></div><div class="ttdeci">int64_t tail()</div><div class="ttdef"><b>Definition:</b> <a href="../../de/d34/offset__byte__queue_8h_source.html#l00055">offset_byte_queue.h:55</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1ByteQueue_html_a452485879d303d5c8654e1b184bc1235"><div class="ttname"><a href="../../d8/d2e/classedash__packager_1_1media_1_1ByteQueue.html#a452485879d303d5c8654e1b184bc1235">edash_packager::media::ByteQueue::Reset</a></div><div class="ttdeci">void Reset()</div><div class="ttdoc">Reset the queue to the empty state. </div><div class="ttdef"><b>Definition:</b> <a href="../../d7/df9/byte__queue_8cc_source.html#l00024">byte_queue.cc:24</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1ByteQueue_html_a8253df160751462f3b75290a7c525e56"><div class="ttname"><a href="../../d8/d2e/classedash__packager_1_1media_1_1ByteQueue.html#a8253df160751462f3b75290a7c525e56">edash_packager::media::ByteQueue::Peek</a></div><div class="ttdeci">void Peek(const uint8_t **data, int *size) const </div><div class="ttdef"><b>Definition:</b> <a href="../../d7/df9/byte__queue_8cc_source.html#l00063">byte_queue.cc:63</a></div></div>
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