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<div class="title">limits.h</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 (c) 2011 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="comment">// Contains limit definition constants for the media subsystem.</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">#ifndef MEDIA_BASE_LIMITS_H_</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor"></span><span class="preprocessor">#define MEDIA_BASE_LIMITS_H_</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor"></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>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> </div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="keyword">namespace </span>limits {</div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="keyword">enum</span> {</div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  <span class="comment">// Maximum possible dimension (width or height) for any video.</span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  kMaxDimension = (1 << 15) - 1, <span class="comment">// 32767</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  <span class="comment">// Maximum possible canvas size (width multiplied by height) for any video.</span></div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  kMaxCanvas = (1 << (14 * 2)), <span class="comment">// 16384 x 16384</span></div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> </div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  <span class="comment">// Total number of video frames which are populating in the pipeline.</span></div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  kMaxVideoFrames = 4,</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  <span class="comment">// The following limits are used by AudioParameters::IsValid().</span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="comment">//</span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  <span class="comment">// A few notes on sample rates of common formats:</span></div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <span class="comment">// - AAC files are limited to 96 kHz.</span></div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="comment">// - MP3 files are limited to 48 kHz.</span></div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="comment">// - Vorbis used to be limited to 96 KHz, but no longer has that</span></div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="comment">// restriction.</span></div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="comment">// - Most PC audio hardware is limited to 192 KHz.</span></div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  kMaxSampleRate = 192000,</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  kMinSampleRate = 3000,</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  kMaxChannels = 32,</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  kMaxBytesPerSample = 4,</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  kMaxBitsPerSample = kMaxBytesPerSample * 8,</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  kMaxSamplesPerPacket = kMaxSampleRate,</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  kMaxPacketSizeInBytes =</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  kMaxBytesPerSample * kMaxChannels * kMaxSamplesPerPacket,</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="comment">// This limit is used by ParamTraits<VideoCaptureParams>.</span></div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  kMaxFramesPerSecond = 1000,</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> };</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> </div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> } <span class="comment">// namespace limits</span></div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> </div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> } <span class="comment">// namespace media</span></div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> } <span class="comment">// namespace shaka</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"> 51</span> <span class="preprocessor">#endif // MEDIA_BASE_LIMITS_H_</span></div>
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