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<li class="navelem"><a class="el" href="dir_ce0ab26228883e873492c15423e35021.html">vpx</a></li> </ul>
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<div class="title">vpx_frame_buffer.h File Reference</div> </div>
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<p>Describes the decoder external frame buffer interface.
<a href="#details">More...</a></p>
<div class="textblock"><code>#include "./vpx_integer.h"</code><br />
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<p><a href="vpx__frame__buffer_8h_source.html">Go to the source code of this file.</a></p>
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<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structvpx__codec__frame__buffer.html">vpx_codec_frame_buffer</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">External frame buffer. <a href="structvpx__codec__frame__buffer.html#details">More...</a><br /></td></tr>
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#define </td><td class="memItemRight" valign="bottom"><a class="el" href="vpx__frame__buffer_8h.html#a92d4c1a691bffa03789df35386788295">VPX_MAXIMUM_WORK_BUFFERS</a>   8</td></tr>
<tr class="memdesc:a92d4c1a691bffa03789df35386788295"><td class="mdescLeft"> </td><td class="mdescRight">The maximum number of work buffers used by libvpx. Support maximum 4 threads to decode video in parallel. Each thread will use one work buffer. TODO(hkuang): Add support to set number of worker threads dynamically. <br /></td></tr>
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#define </td><td class="memItemRight" valign="bottom"><a class="el" href="vpx__frame__buffer_8h.html#abf69f005955646519b1379d5ed67b002">VP9_MAXIMUM_REF_BUFFERS</a>   8</td></tr>
<tr class="memdesc:abf69f005955646519b1379d5ed67b002"><td class="mdescLeft"> </td><td class="mdescRight">The maximum number of reference buffers that a VP9 encoder may use. <br /></td></tr>
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<tr class="memitem:a4de4803ac50d034a9119fde97ef7520b"><td class="memItemLeft" align="right" valign="top">typedef struct <a class="el" href="structvpx__codec__frame__buffer.html">vpx_codec_frame_buffer</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="vpx__frame__buffer_8h.html#a4de4803ac50d034a9119fde97ef7520b">vpx_codec_frame_buffer_t</a></td></tr>
<tr class="memdesc:a4de4803ac50d034a9119fde97ef7520b"><td class="mdescLeft"> </td><td class="mdescRight">External frame buffer. <a href="#a4de4803ac50d034a9119fde97ef7520b">More...</a><br /></td></tr>
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<tr class="memitem:a178a7aeb9acedc2d9e5227cea1301169"><td class="memItemLeft" align="right" valign="top">typedef int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="vpx__frame__buffer_8h.html#a178a7aeb9acedc2d9e5227cea1301169">vpx_get_frame_buffer_cb_fn_t</a>) (void *priv, size_t min_size, <a class="el" href="vpx__frame__buffer_8h.html#a4de4803ac50d034a9119fde97ef7520b">vpx_codec_frame_buffer_t</a> *fb)</td></tr>
<tr class="memdesc:a178a7aeb9acedc2d9e5227cea1301169"><td class="mdescLeft"> </td><td class="mdescRight">get frame buffer callback prototype <a href="#a178a7aeb9acedc2d9e5227cea1301169">More...</a><br /></td></tr>
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<tr class="memitem:a79d9a6a92e4eb753fc2d27f50d996de1"><td class="memItemLeft" align="right" valign="top">typedef int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="vpx__frame__buffer_8h.html#a79d9a6a92e4eb753fc2d27f50d996de1">vpx_release_frame_buffer_cb_fn_t</a>) (void *priv, <a class="el" href="vpx__frame__buffer_8h.html#a4de4803ac50d034a9119fde97ef7520b">vpx_codec_frame_buffer_t</a> *fb)</td></tr>
<tr class="memdesc:a79d9a6a92e4eb753fc2d27f50d996de1"><td class="mdescLeft"> </td><td class="mdescRight">release frame buffer callback prototype <a href="#a79d9a6a92e4eb753fc2d27f50d996de1">More...</a><br /></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Describes the decoder external frame buffer interface. </p>
</div><h2 class="groupheader">Typedef Documentation</h2>
<a id="a4de4803ac50d034a9119fde97ef7520b"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a4de4803ac50d034a9119fde97ef7520b">◆ </a></span>vpx_codec_frame_buffer_t</h2>
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<td class="memname">typedef struct <a class="el" href="structvpx__codec__frame__buffer.html">vpx_codec_frame_buffer</a> <a class="el" href="vpx__frame__buffer_8h.html#a4de4803ac50d034a9119fde97ef7520b">vpx_codec_frame_buffer_t</a></td>
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<p>External frame buffer. </p>
<p>This structure holds allocated frame buffers used by the decoder. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a178a7aeb9acedc2d9e5227cea1301169">◆ </a></span>vpx_get_frame_buffer_cb_fn_t</h2>
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<td class="memname">typedef int(* vpx_get_frame_buffer_cb_fn_t) (void *priv, size_t min_size, <a class="el" href="vpx__frame__buffer_8h.html#a4de4803ac50d034a9119fde97ef7520b">vpx_codec_frame_buffer_t</a> *fb)</td>
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<p>get frame buffer callback prototype </p>
<p>This callback is invoked by the decoder to retrieve data for the frame buffer in order for the decode call to complete. The callback must allocate at least min_size in bytes and assign it to fb->data. The callback must zero out all the data allocated. Then the callback must set fb->size to the allocated size. The application does not need to align the allocated data. The callback is triggered when the decoder needs a frame buffer to decode a compressed image into. This function may be called more than once for every call to vpx_codec_decode. The application may set fb->priv to some data which will be passed back in the ximage and the release function call. |fb| is guaranteed to not be NULL. On success the callback must return 0. Any failure the callback must return a value less than 0.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">priv</td><td>Callback's private data </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">new_size</td><td>Size in bytes needed by the buffer </td></tr>
<tr><td class="paramdir">[in,out]</td><td class="paramname">fb</td><td>Pointer to vpx_codec_frame_buffer_t </td></tr>
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<h2 class="memtitle"><span class="permalink"><a href="#a79d9a6a92e4eb753fc2d27f50d996de1">◆ </a></span>vpx_release_frame_buffer_cb_fn_t</h2>
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<td class="memname">typedef int(* vpx_release_frame_buffer_cb_fn_t) (void *priv, <a class="el" href="vpx__frame__buffer_8h.html#a4de4803ac50d034a9119fde97ef7520b">vpx_codec_frame_buffer_t</a> *fb)</td>
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<p>release frame buffer callback prototype </p>
<p>This callback is invoked by the decoder when the frame buffer is not referenced by any other buffers. |fb| is guaranteed to not be NULL. On success the callback must return 0. Any failure the callback must return a value less than 0.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">priv</td><td>Callback's private data </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">fb</td><td>Pointer to vpx_codec_frame_buffer_t </td></tr>
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