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1 <html>
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3 <head>
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4 <title>libogg - function - ogg_stream_packetout</title>
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5 <link rel=stylesheet href="style.css" type="text/css">
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6 </head>
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7
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8 <body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff">
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9 <table border=0 width=100%>
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10 <tr>
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11 <td><p class=tiny>libogg documentation</p></td>
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12 <td align=right><p class=tiny>libogg release 1.3.0 - 20110804</p></td>
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13 </tr>
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14 </table>
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15
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16 <h1>ogg_stream_packetout</h1>
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17
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18 <p><i>declared in "ogg/ogg.h";</i></p>
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19
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20 <p>This function assembles a data packet for output to the codec
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21 decoding engine. The data has already been submitted to the
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22 <a href="ogg_stream_state.html">ogg_stream_state</a> and broken
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23 into segments. Each successive call returns the next complete packet
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24 built from those segments.</p>
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25
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26 <p>In a typical decoding situation, this should be used after calling
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27 <a href="ogg_stream_pagein.html">ogg_stream_pagein()</a> to submit a
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28 page of data to the bitstream. If the function returns 0, more data is
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29 needed and another page should be submitted. A non-zero return value
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30 indicates successful return of a packet.</p>
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31
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32 <p>The <i>op</i> is filled in with pointers to memory managed by
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33 the stream state and is only valid until the next call. The client
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34 must copy the packet data if a longer lifetime is required.</p>
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35
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36 <br><br>
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37 <table border=0 color=black cellspacing=0 cellpadding=7>
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38 <tr bgcolor=#cccccc>
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39 <td>
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40 <pre><b>
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41 int ogg_stream_packetout(ogg_stream_state *os,ogg_packet *op);
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42 </b></pre>
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43 </td>
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44 </tr>
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45 </table>
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46
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47 <h3>Parameters</h3>
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48 <dl>
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49 <dt><i>os</i></dt>
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50 <dd>Pointer to a previously declared <a
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51 href="ogg_stream_state.html">ogg_stream_state</a> struct. Before this function is called, an <a href="ogg_page.html">ogg_page</a> should be submitted to the stream using <a href="ogg_stream_pagein.html">ogg_stream_pagein()</a>.</dd>
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52 <dt><i>op</i></dt>
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53 <dd>Pointer to the packet to be filled in with pointers to the new data.
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54 This will typically be submitted to a codec for decode after this
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55 function is called. The pointers are only valid until the next call
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56 on this stream state.</dd>
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57 </dl>
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58
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59
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60 <h3>Return Values</h3>
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61 <blockquote>
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62 <ul>
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63 <li>-1 if we are out of sync and there is a gap in the data. This is usually a recoverable error and subsequent calls to ogg_stream_packetout are likely to succeed. <i>op</i> has not been updated.</li>
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64 <li>0 if there is insufficient data available to complete a packet, or on unrecoverable internal error occurred. <i>op</i> has not been updated.
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65 <li>1 if a packet was assembled normally. <i>op</i> contains the next packet from the stream.</li>
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66 </ul>
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67 </blockquote>
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68
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69 <br><br>
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70
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71 <hr noshade>
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72
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73 <table border=0 width=100%>
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74 <tr valign=top>
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75 <td><p class=tiny>copyright © 2000-2010 xiph.org</p></td>
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76 <td align=right><p class=tiny><a href="http://www.xiph.org/ogg/">Ogg Container Format</a></p></td>
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77 </tr><tr>
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78 <td><p class=tiny>libogg documentation</p></td>
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79 <td align=right><p class=tiny>libogg release 1.3.0 - 20110804</p></td>
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80 </tr>
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81 </table>
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82
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83 </body>
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84
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85 </html>
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