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Typedefs</h2></td></tr>
<tr class="memitem:afe2b529ed869d4b672f1a4547dd160af"><td class="memItemLeft" align="right" valign="top">typedef struct <a class="el" href="threadmessage_8h.html#afe2b529ed869d4b672f1a4547dd160af">AVThreadMessageQueue</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="threadmessage_8h.html#afe2b529ed869d4b672f1a4547dd160af">AVThreadMessageQueue</a></td></tr>
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Enumerations</h2></td></tr>
<tr class="memitem:a7fb8bd4d2b779ab5e2044a1b5a5b22f5"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="threadmessage_8h.html#a7fb8bd4d2b779ab5e2044a1b5a5b22f5">AVThreadMessageFlags</a> { <a class="el" href="threadmessage_8h.html#a7fb8bd4d2b779ab5e2044a1b5a5b22f5adc72c40671a489c761960bafc41b1699">AV_THREAD_MESSAGE_NONBLOCK</a> = 1
}</td></tr>
<tr class="separator:a7fb8bd4d2b779ab5e2044a1b5a5b22f5"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:a1734b65da48a88e7c78e8a29b1eee139"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="threadmessage_8h.html#a1734b65da48a88e7c78e8a29b1eee139">av_thread_message_queue_alloc</a> (<a class="el" href="threadmessage_8h.html#afe2b529ed869d4b672f1a4547dd160af">AVThreadMessageQueue</a> **mq, unsigned nelem, unsigned elsize)</td></tr>
<tr class="memdesc:a1734b65da48a88e7c78e8a29b1eee139"><td class="mdescLeft"> </td><td class="mdescRight">Allocate a new message queue. <a href="#a1734b65da48a88e7c78e8a29b1eee139">More...</a><br/></td></tr>
<tr class="separator:a1734b65da48a88e7c78e8a29b1eee139"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a95727669f1ebba16a6a49ea8b9f2276e"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="threadmessage_8h.html#a95727669f1ebba16a6a49ea8b9f2276e">av_thread_message_queue_free</a> (<a class="el" href="threadmessage_8h.html#afe2b529ed869d4b672f1a4547dd160af">AVThreadMessageQueue</a> **mq)</td></tr>
<tr class="memdesc:a95727669f1ebba16a6a49ea8b9f2276e"><td class="mdescLeft"> </td><td class="mdescRight">Free a message queue. <a href="#a95727669f1ebba16a6a49ea8b9f2276e">More...</a><br/></td></tr>
<tr class="separator:a95727669f1ebba16a6a49ea8b9f2276e"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a873d588ed106d8dde339c4a16411e0b8"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="threadmessage_8h.html#a873d588ed106d8dde339c4a16411e0b8">av_thread_message_queue_send</a> (<a class="el" href="threadmessage_8h.html#afe2b529ed869d4b672f1a4547dd160af">AVThreadMessageQueue</a> *mq, void *msg, unsigned flags)</td></tr>
<tr class="memdesc:a873d588ed106d8dde339c4a16411e0b8"><td class="mdescLeft"> </td><td class="mdescRight">Send a message on the queue. <a href="#a873d588ed106d8dde339c4a16411e0b8">More...</a><br/></td></tr>
<tr class="separator:a873d588ed106d8dde339c4a16411e0b8"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a0fb9f4909ad77c541f8ba4409b253111"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="threadmessage_8h.html#a0fb9f4909ad77c541f8ba4409b253111">av_thread_message_queue_recv</a> (<a class="el" href="threadmessage_8h.html#afe2b529ed869d4b672f1a4547dd160af">AVThreadMessageQueue</a> *mq, void *msg, unsigned flags)</td></tr>
<tr class="memdesc:a0fb9f4909ad77c541f8ba4409b253111"><td class="mdescLeft"> </td><td class="mdescRight">Receive a message from the queue. <a href="#a0fb9f4909ad77c541f8ba4409b253111">More...</a><br/></td></tr>
<tr class="separator:a0fb9f4909ad77c541f8ba4409b253111"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a01981ed85e713e682912ee6e063403ad"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="threadmessage_8h.html#a01981ed85e713e682912ee6e063403ad">av_thread_message_queue_set_err_send</a> (<a class="el" href="threadmessage_8h.html#afe2b529ed869d4b672f1a4547dd160af">AVThreadMessageQueue</a> *mq, int err)</td></tr>
<tr class="memdesc:a01981ed85e713e682912ee6e063403ad"><td class="mdescLeft"> </td><td class="mdescRight">Set the sending error code. <a href="#a01981ed85e713e682912ee6e063403ad">More...</a><br/></td></tr>
<tr class="separator:a01981ed85e713e682912ee6e063403ad"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a6b2b6c47728e7d442b31a49ca8f9f971"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="threadmessage_8h.html#a6b2b6c47728e7d442b31a49ca8f9f971">av_thread_message_queue_set_err_recv</a> (<a class="el" href="threadmessage_8h.html#afe2b529ed869d4b672f1a4547dd160af">AVThreadMessageQueue</a> *mq, int err)</td></tr>
<tr class="memdesc:a6b2b6c47728e7d442b31a49ca8f9f971"><td class="mdescLeft"> </td><td class="mdescRight">Set the receiving error code. <a href="#a6b2b6c47728e7d442b31a49ca8f9f971">More...</a><br/></td></tr>
<tr class="separator:a6b2b6c47728e7d442b31a49ca8f9f971"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a55878238c793830dc7de601042873ee6"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="threadmessage_8h.html#a55878238c793830dc7de601042873ee6">av_thread_message_queue_set_free_func</a> (<a class="el" href="threadmessage_8h.html#afe2b529ed869d4b672f1a4547dd160af">AVThreadMessageQueue</a> *mq, void(*free_func)(void *msg))</td></tr>
<tr class="memdesc:a55878238c793830dc7de601042873ee6"><td class="mdescLeft"> </td><td class="mdescRight">Set the optional free message callback function which will be called if an operation is removing messages from the queue. <a href="#a55878238c793830dc7de601042873ee6">More...</a><br/></td></tr>
<tr class="separator:a55878238c793830dc7de601042873ee6"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a8dc5df5158d3098303cdd48e7e3d4ea4"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="threadmessage_8h.html#a8dc5df5158d3098303cdd48e7e3d4ea4">av_thread_message_flush</a> (<a class="el" href="threadmessage_8h.html#afe2b529ed869d4b672f1a4547dd160af">AVThreadMessageQueue</a> *mq)</td></tr>
<tr class="memdesc:a8dc5df5158d3098303cdd48e7e3d4ea4"><td class="mdescLeft"> </td><td class="mdescRight">Flush the message queue. <a href="#a8dc5df5158d3098303cdd48e7e3d4ea4">More...</a><br/></td></tr>
<tr class="separator:a8dc5df5158d3098303cdd48e7e3d4ea4"><td class="memSeparator" colspan="2"> </td></tr>
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<h2 class="groupheader">Typedef Documentation</h2>
<a class="anchor" id="afe2b529ed869d4b672f1a4547dd160af"></a>
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<td class="memname">typedef struct <a class="el" href="threadmessage_8h.html#afe2b529ed869d4b672f1a4547dd160af">AVThreadMessageQueue</a> <a class="el" href="threadmessage_8h.html#afe2b529ed869d4b672f1a4547dd160af">AVThreadMessageQueue</a></td>
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<p>Definition at line <a class="el" href="threadmessage_8h_source.html#l00022">22</a> of file <a class="el" href="threadmessage_8h_source.html">threadmessage.h</a>.</p>
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<h2 class="groupheader">Enumeration Type Documentation</h2>
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<td class="memname">enum <a class="el" href="threadmessage_8h.html#a7fb8bd4d2b779ab5e2044a1b5a5b22f5">AVThreadMessageFlags</a></td>
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<table class="fieldtable">
<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><em><a class="anchor" id="a7fb8bd4d2b779ab5e2044a1b5a5b22f5adc72c40671a489c761960bafc41b1699"></a>AV_THREAD_MESSAGE_NONBLOCK</em> </td><td class="fielddoc">
<p>Perform non-blocking operation. </p>
<p>If this flag is set, send and recv operations are non-blocking and return <a class="el" href="group__lavu__error.html#gae4bb6f165973d09584e0ec0f335f69ca">AVERROR(EAGAIN)</a> immediately if they can not proceed. </p>
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<p>Definition at line <a class="el" href="threadmessage_8h_source.html#l00024">24</a> of file <a class="el" href="threadmessage_8h_source.html">threadmessage.h</a>.</p>
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<h2 class="groupheader">Function Documentation</h2>
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<td class="memname">int av_thread_message_queue_alloc </td>
<td>(</td>
<td class="paramtype"><a class="el" href="threadmessage_8h.html#afe2b529ed869d4b672f1a4547dd160af">AVThreadMessageQueue</a> ** </td>
<td class="paramname"><em>mq</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">unsigned </td>
<td class="paramname"><em>nelem</em>, </td>
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<td class="paramtype">unsigned </td>
<td class="paramname"><em>elsize</em> </td>
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<td>)</td>
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<p>Allocate a new message queue. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">mq</td><td>pointer to the message queue </td></tr>
<tr><td class="paramname">nelem</td><td>maximum number of elements in the queue </td></tr>
<tr><td class="paramname">elsize</td><td>size of each element in the queue </td></tr>
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</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>>=0 for success; <0 for error, in particular <a class="el" href="group__lavu__error.html#gae4bb6f165973d09584e0ec0f335f69ca">AVERROR(ENOSYS)</a> if lavu was built without thread support </dd></dl>
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<td class="memname">void av_thread_message_queue_free </td>
<td>(</td>
<td class="paramtype"><a class="el" href="threadmessage_8h.html#afe2b529ed869d4b672f1a4547dd160af">AVThreadMessageQueue</a> ** </td>
<td class="paramname"><em>mq</em></td><td>)</td>
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<p>Free a message queue. </p>
<p>The message queue must no longer be in use by another thread. </p>
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<td class="memname">int av_thread_message_queue_send </td>
<td>(</td>
<td class="paramtype"><a class="el" href="threadmessage_8h.html#afe2b529ed869d4b672f1a4547dd160af">AVThreadMessageQueue</a> * </td>
<td class="paramname"><em>mq</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">void * </td>
<td class="paramname"><em>msg</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned </td>
<td class="paramname"><em>flags</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<p>Send a message on the queue. </p>
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<td class="memname">int av_thread_message_queue_recv </td>
<td>(</td>
<td class="paramtype"><a class="el" href="threadmessage_8h.html#afe2b529ed869d4b672f1a4547dd160af">AVThreadMessageQueue</a> * </td>
<td class="paramname"><em>mq</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">void * </td>
<td class="paramname"><em>msg</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned </td>
<td class="paramname"><em>flags</em> </td>
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<td></td>
<td>)</td>
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<p>Receive a message from the queue. </p>
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<td class="memname">void av_thread_message_queue_set_err_send </td>
<td>(</td>
<td class="paramtype"><a class="el" href="threadmessage_8h.html#afe2b529ed869d4b672f1a4547dd160af">AVThreadMessageQueue</a> * </td>
<td class="paramname"><em>mq</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>err</em> </td>
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<td>)</td>
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<p>Set the sending error code. </p>
<p>If the error code is set to non-zero, <a class="el" href="threadmessage_8h.html#a0fb9f4909ad77c541f8ba4409b253111" title="Receive a message from the queue. ">av_thread_message_queue_recv()</a> will return it immediately when there are no longer available messages. Conventional values, such as AVERROR_EOF or <a class="el" href="group__lavu__error.html#gae4bb6f165973d09584e0ec0f335f69ca">AVERROR(EAGAIN)</a>, can be used to cause the receiving thread to stop or suspend its operation. </p>
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<td class="memname">void av_thread_message_queue_set_err_recv </td>
<td>(</td>
<td class="paramtype"><a class="el" href="threadmessage_8h.html#afe2b529ed869d4b672f1a4547dd160af">AVThreadMessageQueue</a> * </td>
<td class="paramname"><em>mq</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>err</em> </td>
</tr>
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<td></td>
<td>)</td>
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<p>Set the receiving error code. </p>
<p>If the error code is set to non-zero, <a class="el" href="threadmessage_8h.html#a873d588ed106d8dde339c4a16411e0b8" title="Send a message on the queue. ">av_thread_message_queue_send()</a> will return it immediately. Conventional values, such as AVERROR_EOF or <a class="el" href="group__lavu__error.html#gae4bb6f165973d09584e0ec0f335f69ca">AVERROR(EAGAIN)</a>, can be used to cause the sending thread to stop or suspend its operation. </p>
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<td class="memname">void av_thread_message_queue_set_free_func </td>
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<td class="paramtype"><a class="el" href="threadmessage_8h.html#afe2b529ed869d4b672f1a4547dd160af">AVThreadMessageQueue</a> * </td>
<td class="paramname"><em>mq</em>, </td>
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<td class="paramtype">void(*)(void *msg) </td>
<td class="paramname"><em>free_func</em> </td>
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<td>)</td>
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<p>Set the optional free message callback function which will be called if an operation is removing messages from the queue. </p>
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<td class="memname">void av_thread_message_flush </td>
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<td class="paramname"><em>mq</em></td><td>)</td>
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<p>Flush the message queue. </p>
<p>This function is mostly equivalent to reading and free-ing every message except that it will be done in a single operation (no lock/unlock between reads). </p>
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