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| <a href="#gst-plugins-base-libs-gstrtppayloads.synopsis" class="shortcut">Top</a> |
| | |
| <a href="#gst-plugins-base-libs-gstrtppayloads.description" class="shortcut">Description</a> |
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| <div class="refentry"> |
| <a name="gst-plugins-base-libs-gstrtppayloads"></a><div class="titlepage"></div> |
| <div class="refnamediv"><table width="100%"><tr> |
| <td valign="top"> |
| <h2><span class="refentrytitle"><a name="gst-plugins-base-libs-gstrtppayloads.top_of_page"></a>gstrtppayloads</span></h2> |
| <p>gstrtppayloads — Helper methods for dealing with RTP payloads</p> |
| </td> |
| <td valign="top" align="right"></td> |
| </tr></table></div> |
| <div class="refsynopsisdiv"> |
| <a name="gst-plugins-base-libs-gstrtppayloads.synopsis"></a><h2>Synopsis</h2> |
| <pre class="synopsis"> |
| #include <gst/rtp/gstrtppayload.h> |
| |
| enum <a class="link" href="gst-plugins-base-libs-gstrtppayloads.html#GstRTPPayload" title="enum GstRTPPayload">GstRTPPayload</a>; |
| #define <a class="link" href="gst-plugins-base-libs-gstrtppayloads.html#GST-RTP-PAYLOAD-IS-DYNAMIC:CAPS" title="GST_RTP_PAYLOAD_IS_DYNAMIC()">GST_RTP_PAYLOAD_IS_DYNAMIC</a> (pt) |
| struct <a class="link" href="gst-plugins-base-libs-gstrtppayloads.html#GstRTPPayloadInfo" title="struct GstRTPPayloadInfo">GstRTPPayloadInfo</a>; |
| const <a class="link" href="gst-plugins-base-libs-gstrtppayloads.html#GstRTPPayloadInfo" title="struct GstRTPPayloadInfo"><span class="returnvalue">GstRTPPayloadInfo</span></a> * <a class="link" href="gst-plugins-base-libs-gstrtppayloads.html#gst-rtp-payload-info-for-name" title="gst_rtp_payload_info_for_name ()">gst_rtp_payload_info_for_name</a> (<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *media</code></em>, |
| <em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *encoding_name</code></em>); |
| const <a class="link" href="gst-plugins-base-libs-gstrtppayloads.html#GstRTPPayloadInfo" title="struct GstRTPPayloadInfo"><span class="returnvalue">GstRTPPayloadInfo</span></a> * <a class="link" href="gst-plugins-base-libs-gstrtppayloads.html#gst-rtp-payload-info-for-pt" title="gst_rtp_payload_info_for_pt ()">gst_rtp_payload_info_for_pt</a> (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="type">guint8</span></a> payload_type</code></em>); |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstrtppayloads.description"></a><h2>Description</h2> |
| <p> |
| </p> |
| <div class="refsect2"> |
| <a name="id420172"></a><p> |
| The GstRTPPayloads helper functions makes it easy to deal with static and dynamic |
| payloads. Its main purpose is to retrieve properties such as the default clock-rate |
| and get session bandwidth information. |
| </p> |
| </div> |
| <p> |
| </p> |
| <p> |
| Last reviewed on 2007-10-01 (0.10.15) |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstrtppayloads.details"></a><h2>Details</h2> |
| <div class="refsect2"> |
| <a name="GstRTPPayload"></a><h3>enum GstRTPPayload</h3> |
| <pre class="programlisting">typedef enum { |
| /* Audio: */ |
| GST_RTP_PAYLOAD_PCMU = 0, |
| GST_RTP_PAYLOAD_1016 = 1, /* RFC 3551 says reserved */ |
| GST_RTP_PAYLOAD_G721 = 2, /* RFC 3551 says reserved */ |
| GST_RTP_PAYLOAD_GSM = 3, |
| GST_RTP_PAYLOAD_G723 = 4, |
| GST_RTP_PAYLOAD_DVI4_8000 = 5, |
| GST_RTP_PAYLOAD_DVI4_16000 = 6, |
| GST_RTP_PAYLOAD_LPC = 7, |
| GST_RTP_PAYLOAD_PCMA = 8, |
| GST_RTP_PAYLOAD_G722 = 9, |
| GST_RTP_PAYLOAD_L16_STEREO = 10, |
| GST_RTP_PAYLOAD_L16_MONO = 11, |
| GST_RTP_PAYLOAD_QCELP = 12, |
| GST_RTP_PAYLOAD_CN = 13, |
| GST_RTP_PAYLOAD_MPA = 14, |
| GST_RTP_PAYLOAD_G728 = 15, |
| GST_RTP_PAYLOAD_DVI4_11025 = 16, |
| GST_RTP_PAYLOAD_DVI4_22050 = 17, |
| GST_RTP_PAYLOAD_G729 = 18, |
| |
| /* Video: */ |
| |
| GST_RTP_PAYLOAD_CELLB = 25, |
| GST_RTP_PAYLOAD_JPEG = 26, |
| GST_RTP_PAYLOAD_NV = 28, |
| GST_RTP_PAYLOAD_H261 = 31, |
| GST_RTP_PAYLOAD_MPV = 32, |
| GST_RTP_PAYLOAD_MP2T = 33, |
| GST_RTP_PAYLOAD_H263 = 34, |
| |
| /* BOTH */ |
| } GstRTPPayload; |
| </pre> |
| <p> |
| Standard predefined fixed payload types. |
| </p> |
| <p> |
| The official list is at: |
| http://www.iana.org/assignments/rtp-parameters |
| </p> |
| <p> |
| Audio: |
| reserved: 19 |
| unassigned: 20-23, |
| </p> |
| <p> |
| Video: |
| unassigned: 24, 27, 29, 30, 35-71, 77-95 |
| Reserved for RTCP conflict avoidance: 72-76 |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-PCMU:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_PCMU</code></span></p></td> |
| <td>ITU-T G.711. mu-law audio (RFC 3551) |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-1016:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_1016</code></span></p></td> |
| <td>RFC 3551 says reserved |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-G721:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_G721</code></span></p></td> |
| <td>RFC 3551 says reserved |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-GSM:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_GSM</code></span></p></td> |
| <td>GSM audio |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-G723:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_G723</code></span></p></td> |
| <td>ITU G.723.1 audio |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-DVI4-8000:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_DVI4_8000</code></span></p></td> |
| <td>IMA ADPCM wave type (RFC 3551) |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-DVI4-16000:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_DVI4_16000</code></span></p></td> |
| <td>IMA ADPCM wave type (RFC 3551) |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-LPC:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_LPC</code></span></p></td> |
| <td>experimental linear predictive encoding |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-PCMA:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_PCMA</code></span></p></td> |
| <td>ITU-T G.711 A-law audio (RFC 3551) |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-G722:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_G722</code></span></p></td> |
| <td>ITU-T G.722 (RFC 3551) |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-L16-STEREO:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_L16_STEREO</code></span></p></td> |
| <td>stereo PCM |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-L16-MONO:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_L16_MONO</code></span></p></td> |
| <td>mono PCM |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-QCELP:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_QCELP</code></span></p></td> |
| <td>EIA & TIA standard IS-733 |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-CN:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_CN</code></span></p></td> |
| <td>Comfort Noise (RFC 3389) |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-MPA:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_MPA</code></span></p></td> |
| <td>Audio MPEG 1-3. |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-G728:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_G728</code></span></p></td> |
| <td>ITU-T G.728 Speech coder (RFC 3551) |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-DVI4-11025:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_DVI4_11025</code></span></p></td> |
| <td>IMA ADPCM wave type (RFC 3551) |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-DVI4-22050:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_DVI4_22050</code></span></p></td> |
| <td>IMA ADPCM wave type (RFC 3551) |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-G729:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_G729</code></span></p></td> |
| <td>ITU-T G.729 Speech coder (RFC 3551) |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-CELLB:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_CELLB</code></span></p></td> |
| <td>See RFC 2029 |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-JPEG:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_JPEG</code></span></p></td> |
| <td>ISO Standards 10918-1 and 10918-2 (RFC 2435) |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-NV:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_NV</code></span></p></td> |
| <td>nv encoding by Ron Frederick |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-H261:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_H261</code></span></p></td> |
| <td>ITU-T Recommendation H.261 (RFC 2032) |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-MPV:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_MPV</code></span></p></td> |
| <td>Video MPEG 1 & 2 (RFC 2250) |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-MP2T:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_MP2T</code></span></p></td> |
| <td>MPEG-2 transport stream (RFC 2250) |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-RTP-PAYLOAD-H263:CAPS"></a><span class="term"><code class="literal">GST_RTP_PAYLOAD_H263</code></span></p></td> |
| <td>Video H263 (RFC 2190) |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-RTP-PAYLOAD-IS-DYNAMIC:CAPS"></a><h3>GST_RTP_PAYLOAD_IS_DYNAMIC()</h3> |
| <pre class="programlisting">#define GST_RTP_PAYLOAD_IS_DYNAMIC(pt) ((pt) >= 96 && (pt) <= 127) |
| </pre> |
| <p> |
| Check if <em class="parameter"><code>pt</code></em> is a dynamic payload type. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody><tr> |
| <td><p><span class="term"><em class="parameter"><code>pt</code></em> :</span></p></td> |
| <td>a payload type</td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstRTPPayloadInfo"></a><h3>struct GstRTPPayloadInfo</h3> |
| <pre class="programlisting">struct GstRTPPayloadInfo { |
| guint8 payload_type; |
| const gchar *media; |
| const gchar *encoding_name; |
| guint clock_rate; |
| const gchar *encoding_parameters; |
| guint bitrate; |
| }; |
| </pre> |
| <p> |
| Structure holding default payload type information. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="type">guint8</span></a> <em class="structfield"><code><a name="GstRTPPayloadInfo.payload-type"></a>payload_type</code></em>;</span></p></td> |
| <td>payload type, -1 means dynamic</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *<em class="structfield"><code><a name="GstRTPPayloadInfo.media"></a>media</code></em>;</span></p></td> |
| <td>the media type(s), usually "audio", "video", "application", "text", |
| "message".</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *<em class="structfield"><code><a name="GstRTPPayloadInfo.encoding-name"></a>encoding_name</code></em>;</span></p></td> |
| <td>the encoding name of <em class="parameter"><code>pt</code></em> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> <em class="structfield"><code><a name="GstRTPPayloadInfo.clock-rate"></a>clock_rate</code></em>;</span></p></td> |
| <td>default clock rate, 0 = unknown/variable</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *<em class="structfield"><code><a name="GstRTPPayloadInfo.encoding-parameters"></a>encoding_parameters</code></em>;</span></p></td> |
| <td>encoding parameters. For audio this is the number of |
| channels. NULL = not applicable.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> <em class="structfield"><code><a name="GstRTPPayloadInfo.bitrate"></a>bitrate</code></em>;</span></p></td> |
| <td>the bitrate of the media. 0 = unknown/variable.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-rtp-payload-info-for-name"></a><h3>gst_rtp_payload_info_for_name ()</h3> |
| <pre class="programlisting">const <a class="link" href="gst-plugins-base-libs-gstrtppayloads.html#GstRTPPayloadInfo" title="struct GstRTPPayloadInfo"><span class="returnvalue">GstRTPPayloadInfo</span></a> * gst_rtp_payload_info_for_name (<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *media</code></em>, |
| <em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *encoding_name</code></em>);</pre> |
| <p> |
| Get the <a class="link" href="gst-plugins-base-libs-gstrtppayloads.html#GstRTPPayloadInfo" title="struct GstRTPPayloadInfo"><span class="type">GstRTPPayloadInfo</span></a> for <em class="parameter"><code>media</code></em> and <em class="parameter"><code>encoding_name</code></em>. This function is |
| mostly used to get the default clock-rate and bandwidth for dynamic payload |
| types specified with <em class="parameter"><code>media</code></em> and <em class="parameter"><code>encoding</code></em> name. |
| </p> |
| <p> |
| The search for <em class="parameter"><code>encoding_name</code></em> will be performed in a case insensitve way. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>media</code></em> :</span></p></td> |
| <td>the media to find</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>encoding_name</code></em> :</span></p></td> |
| <td>the encoding name to find</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>a <a class="link" href="gst-plugins-base-libs-gstrtppayloads.html#GstRTPPayloadInfo" title="struct GstRTPPayloadInfo"><span class="type">GstRTPPayloadInfo</span></a> or NULL when no info could be found.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-rtp-payload-info-for-pt"></a><h3>gst_rtp_payload_info_for_pt ()</h3> |
| <pre class="programlisting">const <a class="link" href="gst-plugins-base-libs-gstrtppayloads.html#GstRTPPayloadInfo" title="struct GstRTPPayloadInfo"><span class="returnvalue">GstRTPPayloadInfo</span></a> * gst_rtp_payload_info_for_pt (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="type">guint8</span></a> payload_type</code></em>);</pre> |
| <p> |
| Get the <a class="link" href="gst-plugins-base-libs-gstrtppayloads.html#GstRTPPayloadInfo" title="struct GstRTPPayloadInfo"><span class="type">GstRTPPayloadInfo</span></a> for <em class="parameter"><code>payload_type</code></em>. This function is |
| mostly used to get the default clock-rate and bandwidth for static payload |
| types specified with <em class="parameter"><code>payload_type</code></em>. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>payload_type</code></em> :</span></p></td> |
| <td>the payload_type to find</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>a <a class="link" href="gst-plugins-base-libs-gstrtppayloads.html#GstRTPPayloadInfo" title="struct GstRTPPayloadInfo"><span class="type">GstRTPPayloadInfo</span></a> or NULL when no info could be found.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstrtppayloads.see-also"></a><h2>See Also</h2> |
| gstrtpbuffer |
| </div> |
| </div> |
| <div class="footer"> |
| <hr> |
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| </body> |
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