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| <a href="#gst-plugins-base-libs-gstaudiochannels.synopsis" class="shortcut">Top</a> |
| | |
| <a href="#gst-plugins-base-libs-gstaudiochannels.description" class="shortcut">Description</a> |
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| <div class="refentry"> |
| <a name="gst-plugins-base-libs-gstaudiochannels"></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-gstaudiochannels.top_of_page"></a>gstaudiochannels</span></h2> |
| <p>gstaudiochannels</p> |
| </td> |
| <td valign="top" align="right"></td> |
| </tr></table></div> |
| <div class="refsynopsisdiv"> |
| <a name="gst-plugins-base-libs-gstaudiochannels.synopsis"></a><h2>Synopsis</h2> |
| <pre class="synopsis"> |
| #include <gst/audio/audio-channels.h> |
| |
| enum <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition">GstAudioChannelPosition</a>; |
| #define <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GST-AUDIO-CHANNEL-POSITION-MASK:CAPS" title="GST_AUDIO_CHANNEL_POSITION_MASK()">GST_AUDIO_CHANNEL_POSITION_MASK</a> (pos) |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#gst-audio-channel-positions-to-mask" title="gst_audio_channel_positions_to_mask ()">gst_audio_channel_positions_to_mask</a> (<em class="parameter"><code>const <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition"><span class="type">GstAudioChannelPosition</span></a> *position</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> channels</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> force_order</code></em>, |
| <em class="parameter"><code><span class="type">guint64</span> *channel_mask</code></em>); |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#gst-audio-channel-positions-from-mask" title="gst_audio_channel_positions_from_mask ()">gst_audio_channel_positions_from_mask</a> |
| (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> channels</code></em>, |
| <em class="parameter"><code><span class="type">guint64</span> channel_mask</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition"><span class="type">GstAudioChannelPosition</span></a> *position</code></em>); |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#gst-audio-channel-positions-to-valid-order" title="gst_audio_channel_positions_to_valid_order ()">gst_audio_channel_positions_to_valid_order</a> |
| (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition"><span class="type">GstAudioChannelPosition</span></a> *position</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> channels</code></em>); |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#gst-audio-check-valid-channel-positions" title="gst_audio_check_valid_channel_positions ()">gst_audio_check_valid_channel_positions</a> |
| (<em class="parameter"><code>const <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition"><span class="type">GstAudioChannelPosition</span></a> *position</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> channels</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> force_order</code></em>); |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#gst-audio-buffer-reorder-channels" title="gst_audio_buffer_reorder_channels ()">gst_audio_buffer_reorder_channels</a> (<em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *buffer</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstaudio.html#GstAudioFormat" title="enum GstAudioFormat"><span class="type">GstAudioFormat</span></a> format</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> channels</code></em>, |
| <em class="parameter"><code>const <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition"><span class="type">GstAudioChannelPosition</span></a> *from</code></em>, |
| <em class="parameter"><code>const <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition"><span class="type">GstAudioChannelPosition</span></a> *to</code></em>); |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#gst-audio-reorder-channels" title="gst_audio_reorder_channels ()">gst_audio_reorder_channels</a> (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>, |
| <em class="parameter"><code><span class="type">gsize</span> size</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstaudio.html#GstAudioFormat" title="enum GstAudioFormat"><span class="type">GstAudioFormat</span></a> format</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> channels</code></em>, |
| <em class="parameter"><code>const <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition"><span class="type">GstAudioChannelPosition</span></a> *from</code></em>, |
| <em class="parameter"><code>const <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition"><span class="type">GstAudioChannelPosition</span></a> *to</code></em>); |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#gst-audio-get-channel-reorder-map" title="gst_audio_get_channel_reorder_map ()">gst_audio_get_channel_reorder_map</a> (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> channels</code></em>, |
| <em class="parameter"><code>const <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition"><span class="type">GstAudioChannelPosition</span></a> *from</code></em>, |
| <em class="parameter"><code>const <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition"><span class="type">GstAudioChannelPosition</span></a> *to</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *reorder_map</code></em>); |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstaudiochannels.description"></a><h2>Description</h2> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstaudiochannels.details"></a><h2>Details</h2> |
| <div class="refsect2"> |
| <a name="GstAudioChannelPosition"></a><h3>enum GstAudioChannelPosition</h3> |
| <pre class="programlisting">typedef enum { |
| /* These get negative indices to allow to use |
| * the enum values of the normal cases for the |
| * bit-mask position */ |
| GST_AUDIO_CHANNEL_POSITION_NONE = -3, |
| GST_AUDIO_CHANNEL_POSITION_MONO = -2, |
| GST_AUDIO_CHANNEL_POSITION_INVALID = -1, |
| |
| /* Normal cases */ |
| GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT = 0, |
| GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, |
| GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, |
| GST_AUDIO_CHANNEL_POSITION_LFE1, |
| GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, |
| GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, |
| GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER, |
| GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER, |
| GST_AUDIO_CHANNEL_POSITION_REAR_CENTER, |
| GST_AUDIO_CHANNEL_POSITION_LFE2, |
| GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT, |
| GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT, |
| GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_LEFT, |
| GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_RIGHT, |
| GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_CENTER, |
| GST_AUDIO_CHANNEL_POSITION_TOP_CENTER, |
| GST_AUDIO_CHANNEL_POSITION_TOP_REAR_LEFT, |
| GST_AUDIO_CHANNEL_POSITION_TOP_REAR_RIGHT, |
| GST_AUDIO_CHANNEL_POSITION_TOP_SIDE_LEFT, |
| GST_AUDIO_CHANNEL_POSITION_TOP_SIDE_RIGHT, |
| GST_AUDIO_CHANNEL_POSITION_TOP_REAR_CENTER, |
| GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_CENTER, |
| GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_LEFT, |
| GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_RIGHT, |
| GST_AUDIO_CHANNEL_POSITION_WIDE_LEFT, |
| GST_AUDIO_CHANNEL_POSITION_WIDE_RIGHT, |
| GST_AUDIO_CHANNEL_POSITION_SURROUND_LEFT, |
| GST_AUDIO_CHANNEL_POSITION_SURROUND_RIGHT |
| } GstAudioChannelPosition; |
| </pre> |
| <p> |
| Audio channel positions. |
| </p> |
| <p> |
| These are the channels defined in SMPTE 2036-2-2008 |
| Table 1 for 22.2 audio systems with the Surround and Wide channels from |
| DTS Coherent Acoustics (v.1.3.1) and 10.2 and 7.1 layouts. In the caps the |
| actual channel layout is expressed with a channel count and a channel mask, |
| which describes the existing channels. The positions in the bit mask correspond |
| to the enum values. |
| For negotiation it is allowed to have more bits set in the channel mask than |
| the number of channels to specify the allowed channel positions but this is |
| not allowed in negotiated caps. It is not allowed in any situation other |
| than the one mentioned below to have less bits set in the channel mask than |
| the number of channels. |
| </p> |
| <p> |
| <em class="parameter"><code>GST_AUDIO_CHANNEL_POSITION_MONO</code></em> can only be used with a single mono channel that |
| has no direction information and would be mixed into all directional channels. |
| This is expressed in caps by having a single channel and no channel mask. |
| </p> |
| <p> |
| <em class="parameter"><code>GST_AUDIO_CHANNEL_POSITION_NONE</code></em> can only be used if all channels have this position. |
| This is expressed in caps by having a channel mask with no bits set. |
| </p> |
| <p> |
| As another special case it is allowed to have two channels without a channel mask. |
| This implicitely means that this is a stereo stream with a front left and front right |
| channel. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-NONE:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_NONE</code></span></p></td> |
| <td>used for position-less channels, e.g. |
| from a sound card that records 1024 channels; mutually exclusive with |
| any other channel position |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-MONO:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_MONO</code></span></p></td> |
| <td>Mono without direction; |
| can only be used with 1 channel |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-INVALID:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_INVALID</code></span></p></td> |
| <td>invalid position |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-FRONT-LEFT:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT</code></span></p></td> |
| <td>Front left |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-FRONT-RIGHT:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT</code></span></p></td> |
| <td>Front right |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-FRONT-CENTER:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER</code></span></p></td> |
| <td>Front center |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-LFE1:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_LFE1</code></span></p></td> |
| <td>Low-frequency effects 1 (subwoofer) |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-REAR-LEFT:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_REAR_LEFT</code></span></p></td> |
| <td>Rear left |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-REAR-RIGHT:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT</code></span></p></td> |
| <td>Rear right |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-FRONT-LEFT-OF-CENTER:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER</code></span></p></td> |
| <td>Front left of center |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-FRONT-RIGHT-OF-CENTER:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER</code></span></p></td> |
| <td>Front right of center |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-REAR-CENTER:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_REAR_CENTER</code></span></p></td> |
| <td>Rear center |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-LFE2:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_LFE2</code></span></p></td> |
| <td>Low-frequency effects 2 (subwoofer) |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-SIDE-LEFT:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT</code></span></p></td> |
| <td>Side left |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-SIDE-RIGHT:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT</code></span></p></td> |
| <td>Side right |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-TOP-FRONT-LEFT:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_LEFT</code></span></p></td> |
| <td>Top front left |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-TOP-FRONT-RIGHT:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_RIGHT</code></span></p></td> |
| <td>Top front right |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-TOP-FRONT-CENTER:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_CENTER</code></span></p></td> |
| <td>Top front center |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-TOP-CENTER:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_TOP_CENTER</code></span></p></td> |
| <td>Top center |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-TOP-REAR-LEFT:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_TOP_REAR_LEFT</code></span></p></td> |
| <td>Top rear left |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-TOP-REAR-RIGHT:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_TOP_REAR_RIGHT</code></span></p></td> |
| <td>Top rear right |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-TOP-SIDE-LEFT:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_TOP_SIDE_LEFT</code></span></p></td> |
| <td>Top side right |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-TOP-SIDE-RIGHT:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_TOP_SIDE_RIGHT</code></span></p></td> |
| <td>Top rear right |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-TOP-REAR-CENTER:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_TOP_REAR_CENTER</code></span></p></td> |
| <td>Top rear center |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-BOTTOM-FRONT-CENTER:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_CENTER</code></span></p></td> |
| <td>Bottom front center |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-BOTTOM-FRONT-LEFT:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_LEFT</code></span></p></td> |
| <td>Bottom front left |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-BOTTOM-FRONT-RIGHT:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_RIGHT</code></span></p></td> |
| <td>Bottom front right |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-WIDE-LEFT:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_WIDE_LEFT</code></span></p></td> |
| <td>Wide left (between front left and side left) |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-WIDE-RIGHT:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_WIDE_RIGHT</code></span></p></td> |
| <td>Wide right (between front right and side right) |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-SURROUND-LEFT:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_SURROUND_LEFT</code></span></p></td> |
| <td>Surround left (between rear left and side left) |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-AUDIO-CHANNEL-POSITION-SURROUND-RIGHT:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_CHANNEL_POSITION_SURROUND_RIGHT</code></span></p></td> |
| <td>Surround right (between rear right and side right) |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-AUDIO-CHANNEL-POSITION-MASK:CAPS"></a><h3>GST_AUDIO_CHANNEL_POSITION_MASK()</h3> |
| <pre class="programlisting">#define GST_AUDIO_CHANNEL_POSITION_MASK(pos) (G_GUINT64_CONSTANT(1)<< GST_AUDIO_CHANNEL_POSITION_ ## pos) |
| </pre> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-audio-channel-positions-to-mask"></a><h3>gst_audio_channel_positions_to_mask ()</h3> |
| <pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_audio_channel_positions_to_mask (<em class="parameter"><code>const <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition"><span class="type">GstAudioChannelPosition</span></a> *position</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> channels</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> force_order</code></em>, |
| <em class="parameter"><code><span class="type">guint64</span> *channel_mask</code></em>);</pre> |
| <p> |
| Convert the <em class="parameter"><code>position</code></em> array of <em class="parameter"><code>channels</code></em> channels to a bitmask. |
| </p> |
| <p> |
| If <em class="parameter"><code>force_order</code></em> is <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> it additionally checks if the channels are |
| in the order required by GStreamer. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>position</code></em> :</span></p></td> |
| <td>The <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-base-libs/html/gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition"><code class="literal">GstAudioChannelPositions</code></a>. <span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=channels]</span> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>channels</code></em> :</span></p></td> |
| <td>The number of channels.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>force_order</code></em> :</span></p></td> |
| <td>Only consider the GStreamer channel order.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>channel_mask</code></em> :</span></p></td> |
| <td>the output channel mask. <span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym>]</span> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td> |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the channel positions are valid and could be converted.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-audio-channel-positions-from-mask"></a><h3>gst_audio_channel_positions_from_mask ()</h3> |
| <pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_audio_channel_positions_from_mask |
| (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> channels</code></em>, |
| <em class="parameter"><code><span class="type">guint64</span> channel_mask</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition"><span class="type">GstAudioChannelPosition</span></a> *position</code></em>);</pre> |
| <p> |
| Convert the <em class="parameter"><code>channels</code></em> present in <em class="parameter"><code>channel_mask</code></em> to a <em class="parameter"><code>position</code></em> array |
| (which should have at least <em class="parameter"><code>channels</code></em> entries ensured by caller). |
| If <em class="parameter"><code>channel_mask</code></em> is set to 0, it is considered as 'not present' for purpose |
| of conversion. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>channels</code></em> :</span></p></td> |
| <td>The number of channels</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>channel_mask</code></em> :</span></p></td> |
| <td>The input channel_mask</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>position</code></em> :</span></p></td> |
| <td>The |
| <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition"><code class="literal">GstAudioChannelPosition</code></a>s. <span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=channels]</span> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td> |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if channel and channel mask are valid and could be converted</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-audio-channel-positions-to-valid-order"></a><h3>gst_audio_channel_positions_to_valid_order ()</h3> |
| <pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_audio_channel_positions_to_valid_order |
| (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition"><span class="type">GstAudioChannelPosition</span></a> *position</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> channels</code></em>);</pre> |
| <p> |
| Reorders the channel positions in <em class="parameter"><code>position</code></em> from any order to |
| the GStreamer channel order. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>position</code></em> :</span></p></td> |
| <td>The channel positions to |
| reorder to. <span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=channels]</span> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>channels</code></em> :</span></p></td> |
| <td>The number of channels.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td> |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the channel positions are valid and reordering |
| was successful.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-audio-check-valid-channel-positions"></a><h3>gst_audio_check_valid_channel_positions ()</h3> |
| <pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_audio_check_valid_channel_positions |
| (<em class="parameter"><code>const <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition"><span class="type">GstAudioChannelPosition</span></a> *position</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> channels</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> force_order</code></em>);</pre> |
| <p> |
| Checks if <em class="parameter"><code>position</code></em> contains valid channel positions for |
| <em class="parameter"><code>channels</code></em> channels. If <em class="parameter"><code>force_order</code></em> is <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> it additionally |
| checks if the channels are in the order required by GStreamer. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>position</code></em> :</span></p></td> |
| <td>The <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-base-libs/html/gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition"><code class="literal">GstAudioChannelPositions</code></a> |
| to check. <span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=channels]</span> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>channels</code></em> :</span></p></td> |
| <td>The number of channels.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>force_order</code></em> :</span></p></td> |
| <td>Only consider the GStreamer channel order.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td> |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the channel positions are valid.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-audio-buffer-reorder-channels"></a><h3>gst_audio_buffer_reorder_channels ()</h3> |
| <pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_audio_buffer_reorder_channels (<em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *buffer</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstaudio.html#GstAudioFormat" title="enum GstAudioFormat"><span class="type">GstAudioFormat</span></a> format</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> channels</code></em>, |
| <em class="parameter"><code>const <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition"><span class="type">GstAudioChannelPosition</span></a> *from</code></em>, |
| <em class="parameter"><code>const <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition"><span class="type">GstAudioChannelPosition</span></a> *to</code></em>);</pre> |
| <p> |
| Reorders <em class="parameter"><code>buffer</code></em> from the channel positions <em class="parameter"><code>from</code></em> to the channel |
| positions <em class="parameter"><code>to</code></em>. <em class="parameter"><code>from</code></em> and <em class="parameter"><code>to</code></em> must contain the same number of |
| positions and the same positions, only in a different order. |
| <em class="parameter"><code>buffer</code></em> must be writable. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>buffer</code></em> :</span></p></td> |
| <td>The buffer to reorder.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>format</code></em> :</span></p></td> |
| <td>The <a class="link" href="gst-plugins-base-libs-gstaudio.html#GstAudioFormat" title="enum GstAudioFormat"><code class="literal">GstAudioFormat</code></a> of the buffer.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>channels</code></em> :</span></p></td> |
| <td>The number of channels.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>from</code></em> :</span></p></td> |
| <td>The channel positions in the buffer. <span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym>]</span> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>to</code></em> :</span></p></td> |
| <td>The channel positions to convert to. <span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym>]</span> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td> |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the reordering was possible.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-audio-reorder-channels"></a><h3>gst_audio_reorder_channels ()</h3> |
| <pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_audio_reorder_channels (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>, |
| <em class="parameter"><code><span class="type">gsize</span> size</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstaudio.html#GstAudioFormat" title="enum GstAudioFormat"><span class="type">GstAudioFormat</span></a> format</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> channels</code></em>, |
| <em class="parameter"><code>const <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition"><span class="type">GstAudioChannelPosition</span></a> *from</code></em>, |
| <em class="parameter"><code>const <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition"><span class="type">GstAudioChannelPosition</span></a> *to</code></em>);</pre> |
| <p> |
| Reorders <em class="parameter"><code>data</code></em> from the channel positions <em class="parameter"><code>from</code></em> to the channel |
| positions <em class="parameter"><code>to</code></em>. <em class="parameter"><code>from</code></em> and <em class="parameter"><code>to</code></em> must contain the same number of |
| positions and the same positions, only in a different order. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td> |
| <td>The pointer to |
| the memory. <span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=size][<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> guint8]</span> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>size</code></em> :</span></p></td> |
| <td>The size of the memory.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>format</code></em> :</span></p></td> |
| <td>The <a class="link" href="gst-plugins-base-libs-gstaudio.html#GstAudioFormat" title="enum GstAudioFormat"><code class="literal">GstAudioFormat</code></a> of the buffer.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>channels</code></em> :</span></p></td> |
| <td>The number of channels.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>from</code></em> :</span></p></td> |
| <td>The channel positions in the buffer. <span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym>]</span> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>to</code></em> :</span></p></td> |
| <td>The channel positions to convert to. <span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym>]</span> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td> |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the reordering was possible.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-audio-get-channel-reorder-map"></a><h3>gst_audio_get_channel_reorder_map ()</h3> |
| <pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_audio_get_channel_reorder_map (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> channels</code></em>, |
| <em class="parameter"><code>const <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition"><span class="type">GstAudioChannelPosition</span></a> *from</code></em>, |
| <em class="parameter"><code>const <a class="link" href="gst-plugins-base-libs-gstaudiochannels.html#GstAudioChannelPosition" title="enum GstAudioChannelPosition"><span class="type">GstAudioChannelPosition</span></a> *to</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *reorder_map</code></em>);</pre> |
| <p> |
| Returns a reorder map for <em class="parameter"><code>from</code></em> to <em class="parameter"><code>to</code></em> that can be used in |
| custom channel reordering code, e.g. to convert from or to the |
| GStreamer channel order. <em class="parameter"><code>from</code></em> and <em class="parameter"><code>to</code></em> must contain the same |
| number of positions and the same positions, only in a |
| different order. |
| </p> |
| <p> |
| The resulting <em class="parameter"><code>reorder_map</code></em> can be used for reordering by assigning |
| channel i of the input to channel reorder_map[i] of the output. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>channels</code></em> :</span></p></td> |
| <td>The number of channels.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>from</code></em> :</span></p></td> |
| <td>The channel positions to reorder from. <span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym>]</span> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>to</code></em> :</span></p></td> |
| <td>The channel positions to reorder to. <span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym>]</span> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>reorder_map</code></em> :</span></p></td> |
| <td>Pointer to the reorder map. <span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym>]</span> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td> |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the channel positions are valid and reordering |
| is possible.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| </div> |
| <div class="footer"> |
| <hr> |
| Generated by GTK-Doc V1.19</div> |
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