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<a name="gst-plugins-base-libs-gstvideoutils"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
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<h2><span class="refentrytitle"><a name="gst-plugins-base-libs-gstvideoutils.top_of_page"></a>gstvideoutils</span></h2>
<p>gstvideoutils</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="gst-plugins-base-libs-gstvideoutils.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">struct <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame">GstVideoCodecFrame</a>;
enum <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrameFlags" title="enum GstVideoCodecFrameFlags">GstVideoCodecFrameFlags</a>;
#define <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GST-VIDEO-CODEC-FRAME-FLAGS:CAPS" title="GST_VIDEO_CODEC_FRAME_FLAGS()">GST_VIDEO_CODEC_FRAME_FLAGS</a> (frame)
#define <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GST-VIDEO-CODEC-FRAME-FLAG-IS-SET:CAPS" title="GST_VIDEO_CODEC_FRAME_FLAG_IS_SET()">GST_VIDEO_CODEC_FRAME_FLAG_IS_SET</a> (frame,
flag)
#define <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GST-VIDEO-CODEC-FRAME-FLAG-SET:CAPS" title="GST_VIDEO_CODEC_FRAME_FLAG_SET()">GST_VIDEO_CODEC_FRAME_FLAG_SET</a> (frame,
flag)
#define <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GST-VIDEO-CODEC-FRAME-FLAG-UNSET:CAPS" title="GST_VIDEO_CODEC_FRAME_FLAG_UNSET()">GST_VIDEO_CODEC_FRAME_FLAG_UNSET</a> (frame,
flag)
#define <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GST-VIDEO-CODEC-FRAME-IS-DECODE-ONLY:CAPS" title="GST_VIDEO_CODEC_FRAME_IS_DECODE_ONLY()">GST_VIDEO_CODEC_FRAME_IS_DECODE_ONLY</a>(frame)
#define <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GST-VIDEO-CODEC-FRAME-IS-FORCE-KEYFRAME:CAPS" title="GST_VIDEO_CODEC_FRAME_IS_FORCE_KEYFRAME()">GST_VIDEO_CODEC_FRAME_IS_FORCE_KEYFRAME</a>(frame)
#define <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GST-VIDEO-CODEC-FRAME-IS-FORCE-KEYFRAME-HEADERS:CAPS" title="GST_VIDEO_CODEC_FRAME_IS_FORCE_KEYFRAME_HEADERS()">GST_VIDEO_CODEC_FRAME_IS_FORCE_KEYFRAME_HEADERS</a>(frame)
#define <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GST-VIDEO-CODEC-FRAME-IS-SYNC-POINT:CAPS" title="GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT()">GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT</a> (frame)
#define <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GST-VIDEO-CODEC-FRAME-SET-DECODE-ONLY:CAPS" title="GST_VIDEO_CODEC_FRAME_SET_DECODE_ONLY()">GST_VIDEO_CODEC_FRAME_SET_DECODE_ONLY</a>(frame)
#define <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GST-VIDEO-CODEC-FRAME-SET-FORCE-KEYFRAME:CAPS" title="GST_VIDEO_CODEC_FRAME_SET_FORCE_KEYFRAME()">GST_VIDEO_CODEC_FRAME_SET_FORCE_KEYFRAME</a>(frame)
#define <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GST-VIDEO-CODEC-FRAME-SET-FORCE-KEYFRAME-HEADERS:CAPS" title="GST_VIDEO_CODEC_FRAME_SET_FORCE_KEYFRAME_HEADERS()">GST_VIDEO_CODEC_FRAME_SET_FORCE_KEYFRAME_HEADERS</a>(frame)
#define <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GST-VIDEO-CODEC-FRAME-SET-SYNC-POINT:CAPS" title="GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT()">GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT</a>(frame)
#define <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GST-VIDEO-CODEC-FRAME-UNSET-FORCE-KEYFRAME:CAPS" title="GST_VIDEO_CODEC_FRAME_UNSET_FORCE_KEYFRAME()">GST_VIDEO_CODEC_FRAME_UNSET_FORCE_KEYFRAME</a>(frame)
#define <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GST-VIDEO-CODEC-FRAME-UNSET-FORCE-KEYFRAME-HEADERS:CAPS" title="GST_VIDEO_CODEC_FRAME_UNSET_FORCE_KEYFRAME_HEADERS()">GST_VIDEO_CODEC_FRAME_UNSET_FORCE_KEYFRAME_HEADERS</a>(frame)
#define <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GST-VIDEO-CODEC-FRAME-UNSET-SYNC-POINT:CAPS" title="GST_VIDEO_CODEC_FRAME_UNSET_SYNC_POINT()">GST_VIDEO_CODEC_FRAME_UNSET_SYNC_POINT</a>(frame)
<a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="returnvalue">GstVideoCodecFrame</span></a> * <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#gst-video-codec-frame-ref" title="gst_video_codec_frame_ref ()">gst_video_codec_frame_ref</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a> *frame</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#gst-video-codec-frame-unref" title="gst_video_codec_frame_unref ()">gst_video_codec_frame_unref</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a> *frame</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#gst-video-codec-frame-set-user-data" title="gst_video_codec_frame_set_user_data ()">gst_video_codec_frame_set_user_data</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a> *frame</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> notify</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="returnvalue">gpointer</span></a> <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#gst-video-codec-frame-get-user-data" title="gst_video_codec_frame_get_user_data ()">gst_video_codec_frame_get_user_data</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a> *frame</code></em>);
struct <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecState" title="struct GstVideoCodecState">GstVideoCodecState</a>;
<a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecState" title="struct GstVideoCodecState"><span class="returnvalue">GstVideoCodecState</span></a> * <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#gst-video-codec-state-ref" title="gst_video_codec_state_ref ()">gst_video_codec_state_ref</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecState" title="struct GstVideoCodecState"><span class="type">GstVideoCodecState</span></a> *state</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#gst-video-codec-state-unref" title="gst_video_codec_state_unref ()">gst_video_codec_state_unref</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecState" title="struct GstVideoCodecState"><span class="type">GstVideoCodecState</span></a> *state</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstvideoutils.description"></a><h2>Description</h2>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstvideoutils.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GstVideoCodecFrame"></a><h3>struct GstVideoCodecFrame</h3>
<pre class="programlisting">struct GstVideoCodecFrame {
guint32 system_frame_number; /* ED */
guint32 decode_frame_number; /* ED */
guint32 presentation_frame_number; /* ED */
GstClockTime dts; /* ED */
GstClockTime pts; /* ED */
GstClockTime duration; /* ED */
int distance_from_sync; /* ED */
GstBuffer *input_buffer; /* ED */
GstBuffer *output_buffer; /* ED */
GstClockTime deadline; /* D */
};
</pre>
<p>
A <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a> represents a video frame both in raw and
encoded form.
</p>
<div class="variablelist"><table border="0" class="variablelist">
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</colgroup>
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<td><p><span class="term"><span class="type">guint32</span> <em class="structfield"><code><a name="GstVideoCodecFrame.system-frame-number"></a>system_frame_number</code></em>;</span></p></td>
<td>Unique identifier for the frame. Use this if you need
to get hold of the frame later (like when data is being decoded).
Typical usage in decoders is to set this on the opaque value provided
to the library and get back the frame using <a class="link" href="gst-plugins-base-libs-GstVideoDecoder.html#gst-video-decoder-get-frame" title="gst_video_decoder_get_frame ()"><code class="function">gst_video_decoder_get_frame()</code></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">guint32</span> <em class="structfield"><code><a name="GstVideoCodecFrame.decode-frame-number"></a>decode_frame_number</code></em>;</span></p></td>
<td></td>
</tr>
<tr>
<td><p><span class="term"><span class="type">guint32</span> <em class="structfield"><code><a name="GstVideoCodecFrame.presentation-frame-number"></a>presentation_frame_number</code></em>;</span></p></td>
<td></td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> <em class="structfield"><code><a name="GstVideoCodecFrame.dts"></a>dts</code></em>;</span></p></td>
<td>Decoding timestamp</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> <em class="structfield"><code><a name="GstVideoCodecFrame.pts"></a>pts</code></em>;</span></p></td>
<td>Presentation timestamp</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> <em class="structfield"><code><a name="GstVideoCodecFrame.duration"></a>duration</code></em>;</span></p></td>
<td>Duration of the frame</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">int</span> <em class="structfield"><code><a name="GstVideoCodecFrame.distance-from-sync"></a>distance_from_sync</code></em>;</span></p></td>
<td>Distance in frames from the last synchronization point.</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *<em class="structfield"><code><a name="GstVideoCodecFrame.input-buffer"></a>input_buffer</code></em>;</span></p></td>
<td>the input <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> that created this frame. The buffer is owned
by the frame and references to the frame instead of the buffer should</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *<em class="structfield"><code><a name="GstVideoCodecFrame.output-buffer"></a>output_buffer</code></em>;</span></p></td>
<td>the output <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a>. Implementations should set this either
directly, or by using the <em class="parameter"><code><code class="function">gst_video_decoder_alloc_output_frame()</code></code></em> or
<em class="parameter"><code><code class="function">gst_video_decoder_alloc_output_buffer()</code></code></em> methods. The buffer is owned
by the frame and references to the frame instead of the buffer should
be kept.</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> <em class="structfield"><code><a name="GstVideoCodecFrame.deadline"></a>deadline</code></em>;</span></p></td>
<td>Running time when the frame will be used.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GstVideoCodecFrameFlags"></a><h3>enum GstVideoCodecFrameFlags</h3>
<pre class="programlisting">typedef enum {
GST_VIDEO_CODEC_FRAME_FLAG_DECODE_ONLY = (1<<0),
GST_VIDEO_CODEC_FRAME_FLAG_SYNC_POINT = (1<<1),
GST_VIDEO_CODEC_FRAME_FLAG_FORCE_KEYFRAME = (1<<2),
GST_VIDEO_CODEC_FRAME_FLAG_FORCE_KEYFRAME_HEADERS = (1<<3)
} GstVideoCodecFrameFlags;
</pre>
<p>
Flags for <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a>
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><a name="GST-VIDEO-CODEC-FRAME-FLAG-DECODE-ONLY:CAPS"></a><span class="term"><code class="literal">GST_VIDEO_CODEC_FRAME_FLAG_DECODE_ONLY</code></span></p></td>
<td>is the frame only meant to be decoded
</td>
</tr>
<tr>
<td><p><a name="GST-VIDEO-CODEC-FRAME-FLAG-SYNC-POINT:CAPS"></a><span class="term"><code class="literal">GST_VIDEO_CODEC_FRAME_FLAG_SYNC_POINT</code></span></p></td>
<td>is the frame a synchronization point (keyframe)
</td>
</tr>
<tr>
<td><p><a name="GST-VIDEO-CODEC-FRAME-FLAG-FORCE-KEYFRAME:CAPS"></a><span class="term"><code class="literal">GST_VIDEO_CODEC_FRAME_FLAG_FORCE_KEYFRAME</code></span></p></td>
<td>should the output frame be made a keyframe
</td>
</tr>
<tr>
<td><p><a name="GST-VIDEO-CODEC-FRAME-FLAG-FORCE-KEYFRAME-HEADERS:CAPS"></a><span class="term"><code class="literal">GST_VIDEO_CODEC_FRAME_FLAG_FORCE_KEYFRAME_HEADERS</code></span></p></td>
<td>should the encoder output stream headers
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-VIDEO-CODEC-FRAME-FLAGS:CAPS"></a><h3>GST_VIDEO_CODEC_FRAME_FLAGS()</h3>
<pre class="programlisting">#define GST_VIDEO_CODEC_FRAME_FLAGS(frame) ((frame)->flags)
</pre>
<p>
The entire set of flags for the <em class="parameter"><code>frame</code></em>
</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>frame</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-VIDEO-CODEC-FRAME-FLAG-IS-SET:CAPS"></a><h3>GST_VIDEO_CODEC_FRAME_FLAG_IS_SET()</h3>
<pre class="programlisting">#define GST_VIDEO_CODEC_FRAME_FLAG_IS_SET(frame,flag) !!(GST_VIDEO_CODEC_FRAME_FLAGS(frame) & (flag))
</pre>
<p>
Checks whether the given <em class="parameter"><code>flag</code></em> is set
</p>
<div class="variablelist"><table border="0" class="variablelist">
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<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>frame</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>flag</code></em> :</span></p></td>
<td>a flag to check for</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-VIDEO-CODEC-FRAME-FLAG-SET:CAPS"></a><h3>GST_VIDEO_CODEC_FRAME_FLAG_SET()</h3>
<pre class="programlisting">#define GST_VIDEO_CODEC_FRAME_FLAG_SET(frame,flag) (GST_VIDEO_CODEC_FRAME_FLAGS(frame) |= (flag))
</pre>
<p>
This macro sets the given bits
</p>
<div class="variablelist"><table border="0" class="variablelist">
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<td><p><span class="term"><em class="parameter"><code>frame</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>flag</code></em> :</span></p></td>
<td>Flag to set, can be any number of bits in guint32.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-VIDEO-CODEC-FRAME-FLAG-UNSET:CAPS"></a><h3>GST_VIDEO_CODEC_FRAME_FLAG_UNSET()</h3>
<pre class="programlisting">#define GST_VIDEO_CODEC_FRAME_FLAG_UNSET(frame,flag) (GST_VIDEO_CODEC_FRAME_FLAGS(frame) &= ~(flag))
</pre>
<p>
This macro usets the given bits.
</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>frame</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>flag</code></em> :</span></p></td>
<td>Flag to unset</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-VIDEO-CODEC-FRAME-IS-DECODE-ONLY:CAPS"></a><h3>GST_VIDEO_CODEC_FRAME_IS_DECODE_ONLY()</h3>
<pre class="programlisting">#define GST_VIDEO_CODEC_FRAME_IS_DECODE_ONLY(frame) (GST_VIDEO_CODEC_FRAME_FLAG_IS_SET(frame, GST_VIDEO_CODEC_FRAME_FLAG_DECODE_ONLY))
</pre>
<p>
Tests if the buffer should only be decoded but not sent downstream.
</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>frame</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-VIDEO-CODEC-FRAME-IS-FORCE-KEYFRAME:CAPS"></a><h3>GST_VIDEO_CODEC_FRAME_IS_FORCE_KEYFRAME()</h3>
<pre class="programlisting">#define GST_VIDEO_CODEC_FRAME_IS_FORCE_KEYFRAME(frame) (GST_VIDEO_CODEC_FRAME_FLAG_IS_SET(frame, GST_VIDEO_CODEC_FRAME_FLAG_FORCE_KEYFRAME))
</pre>
<p>
Tests if the frame must be encoded as a keyframe. Applies only to
frames provided to encoders. Decoders can safely ignore this field.
</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>frame</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-VIDEO-CODEC-FRAME-IS-FORCE-KEYFRAME-HEADERS:CAPS"></a><h3>GST_VIDEO_CODEC_FRAME_IS_FORCE_KEYFRAME_HEADERS()</h3>
<pre class="programlisting">#define GST_VIDEO_CODEC_FRAME_IS_FORCE_KEYFRAME_HEADERS(frame) (GST_VIDEO_CODEC_FRAME_FLAG_IS_SET(frame, GST_VIDEO_CODEC_FRAME_FLAG_FORCE_KEYFRAME_HEADERS))
</pre>
<p>
Tests if encoder should output stream headers before outputting the
resulting encoded buffer for the given frame.
</p>
<p>
Applies only to frames provided to encoders. Decoders can safely
ignore this field.
</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>frame</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-VIDEO-CODEC-FRAME-IS-SYNC-POINT:CAPS"></a><h3>GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT()</h3>
<pre class="programlisting">#define GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT(frame) (GST_VIDEO_CODEC_FRAME_FLAG_IS_SET(frame, GST_VIDEO_CODEC_FRAME_FLAG_SYNC_POINT))
</pre>
<p>
Tests if the frame is a synchronization point (like a keyframe).
</p>
<p>
Decoder implementations can use this to detect keyframes.
</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>frame</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-VIDEO-CODEC-FRAME-SET-DECODE-ONLY:CAPS"></a><h3>GST_VIDEO_CODEC_FRAME_SET_DECODE_ONLY()</h3>
<pre class="programlisting">#define GST_VIDEO_CODEC_FRAME_SET_DECODE_ONLY(frame) (GST_VIDEO_CODEC_FRAME_FLAG_SET(frame, GST_VIDEO_CODEC_FRAME_FLAG_DECODE_ONLY))
</pre>
<p>
Sets the buffer to not be sent downstream.
</p>
<p>
Decoder implementation can use this if they have frames that
are not meant to be displayed.
</p>
<p>
Encoder implementation can safely ignore this field.
</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>frame</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-VIDEO-CODEC-FRAME-SET-FORCE-KEYFRAME:CAPS"></a><h3>GST_VIDEO_CODEC_FRAME_SET_FORCE_KEYFRAME()</h3>
<pre class="programlisting">#define GST_VIDEO_CODEC_FRAME_SET_FORCE_KEYFRAME(frame) (GST_VIDEO_CODEC_FRAME_FLAG_SET(frame, GST_VIDEO_CODEC_FRAME_FLAG_FORCE_KEYFRAME))
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GST-VIDEO-CODEC-FRAME-SET-FORCE-KEYFRAME-HEADERS:CAPS"></a><h3>GST_VIDEO_CODEC_FRAME_SET_FORCE_KEYFRAME_HEADERS()</h3>
<pre class="programlisting">#define GST_VIDEO_CODEC_FRAME_SET_FORCE_KEYFRAME_HEADERS(frame) (GST_VIDEO_CODEC_FRAME_FLAG_SET(frame, GST_VIDEO_CODEC_FRAME_FLAG_FORCE_KEYFRAME_HEADERS))
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GST-VIDEO-CODEC-FRAME-SET-SYNC-POINT:CAPS"></a><h3>GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT()</h3>
<pre class="programlisting">#define GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT(frame) (GST_VIDEO_CODEC_FRAME_FLAG_SET(frame, GST_VIDEO_CODEC_FRAME_FLAG_SYNC_POINT))
</pre>
<p>
Sets the frame to be a synchronization point (like a keyframe).
</p>
<p>
Encoder implementations should set this accordingly.
</p>
<p>
Decoder implementing parsing features should set this when they
detect such a synchronization point.
</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>frame</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-VIDEO-CODEC-FRAME-UNSET-FORCE-KEYFRAME:CAPS"></a><h3>GST_VIDEO_CODEC_FRAME_UNSET_FORCE_KEYFRAME()</h3>
<pre class="programlisting">#define GST_VIDEO_CODEC_FRAME_UNSET_FORCE_KEYFRAME(frame) (GST_VIDEO_CODEC_FRAME_FLAG_UNSET(frame, GST_VIDEO_CODEC_FRAME_FLAG_FORCE_KEYFRAME))
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GST-VIDEO-CODEC-FRAME-UNSET-FORCE-KEYFRAME-HEADERS:CAPS"></a><h3>GST_VIDEO_CODEC_FRAME_UNSET_FORCE_KEYFRAME_HEADERS()</h3>
<pre class="programlisting">#define GST_VIDEO_CODEC_FRAME_UNSET_FORCE_KEYFRAME_HEADERS(frame) (GST_VIDEO_CODEC_FRAME_FLAG_UNSET(frame, GST_VIDEO_CODEC_FRAME_FLAG_FORCE_KEYFRAME_HEADERS))
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GST-VIDEO-CODEC-FRAME-UNSET-SYNC-POINT:CAPS"></a><h3>GST_VIDEO_CODEC_FRAME_UNSET_SYNC_POINT()</h3>
<pre class="programlisting">#define GST_VIDEO_CODEC_FRAME_UNSET_SYNC_POINT(frame) (GST_VIDEO_CODEC_FRAME_FLAG_UNSET(frame, GST_VIDEO_CODEC_FRAME_FLAG_SYNC_POINT))
</pre>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-codec-frame-ref"></a><h3>gst_video_codec_frame_ref ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="returnvalue">GstVideoCodecFrame</span></a> * gst_video_codec_frame_ref (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a> *frame</code></em>);</pre>
<p>
Increases the refcount of the given frame by one.
</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>frame</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td><em class="parameter"><code>buf</code></em></td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-codec-frame-unref"></a><h3>gst_video_codec_frame_unref ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_video_codec_frame_unref (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a> *frame</code></em>);</pre>
<p>
Decreases the refcount of the frame. If the refcount reaches 0, the frame
will be freed.
</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>frame</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-codec-frame-set-user-data"></a><h3>gst_video_codec_frame_set_user_data ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_video_codec_frame_set_user_data (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a> *frame</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> notify</code></em>);</pre>
<p>
Sets <em class="parameter"><code>user_data</code></em> on the frame and the <a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> that will be called when
the frame is freed. Allows to attach private data by the subclass to frames.
</p>
<p>
If a <em class="parameter"><code>user_data</code></em> was previously set, then the previous set <em class="parameter"><code>notify</code></em> will be called
before the <em class="parameter"><code>user_data</code></em> is replaced.
</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>frame</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>private data</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>notify</code></em> :</span></p></td>
<td>a <a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a>. <span class="annotation">[<acronym title="This parameter is a 'user_data', for callbacks; many bindings can pass NULL here."><span class="acronym">closure</span></acronym> user_data]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-codec-frame-get-user-data"></a><h3>gst_video_codec_frame_get_user_data ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="returnvalue">gpointer</span></a> gst_video_codec_frame_get_user_data (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a> *frame</code></em>);</pre>
<p>
Gets private data set on the frame by the subclass via
<a class="link" href="gst-plugins-base-libs-gstvideoutils.html#gst-video-codec-frame-set-user-data" title="gst_video_codec_frame_set_user_data ()"><code class="function">gst_video_codec_frame_set_user_data()</code></a> previously.
</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>frame</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecFrame" title="struct GstVideoCodecFrame"><span class="type">GstVideoCodecFrame</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The previously set user_data. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GstVideoCodecState"></a><h3>struct GstVideoCodecState</h3>
<pre class="programlisting">struct GstVideoCodecState {
GstVideoInfo info;
GstCaps *caps;
GstBuffer *codec_data;
};
</pre>
<p>
Structure representing the state of an incoming or outgoing video
stream for encoders and decoders.
</p>
<p>
Decoders and encoders will receive such a state through their
respective <em class="parameter"><code>set_format</code></em> vmethods.
</p>
<p>
Decoders and encoders can set the downstream state, by using the
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstVideoDecoder.html#gst-video-decoder-set-output-state" title="gst_video_decoder_set_output_state ()"><code class="function">gst_video_decoder_set_output_state()</code></a></code></em> or
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstVideoEncoder.html#gst-video-encoder-set-output-state" title="gst_video_encoder_set_output_state ()"><code class="function">gst_video_encoder_set_output_state()</code></a></code></em> methods.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><a class="link" href="gst-plugins-base-libs-gstvideo.html#GstVideoInfo" title="struct GstVideoInfo"><span class="type">GstVideoInfo</span></a> <em class="structfield"><code><a name="GstVideoCodecState.info"></a>info</code></em>;</span></p></td>
<td>The <a class="link" href="gst-plugins-base-libs-gstvideo.html#GstVideoInfo" title="struct GstVideoInfo"><span class="type">GstVideoInfo</span></a> describing the stream</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstCaps.html#GstCaps"><span class="type">GstCaps</span></a> *<em class="structfield"><code><a name="GstVideoCodecState.caps"></a>caps</code></em>;</span></p></td>
<td>The <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstCaps.html#GstCaps"><span class="type">GstCaps</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *<em class="structfield"><code><a name="GstVideoCodecState.codec-data"></a>codec_data</code></em>;</span></p></td>
<td>(optional) a <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> corresponding to the
'codec_data' field of a stream.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-codec-state-ref"></a><h3>gst_video_codec_state_ref ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecState" title="struct GstVideoCodecState"><span class="returnvalue">GstVideoCodecState</span></a> * gst_video_codec_state_ref (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecState" title="struct GstVideoCodecState"><span class="type">GstVideoCodecState</span></a> *state</code></em>);</pre>
<p>
Increases the refcount of the given state by one.
</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>state</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecState" title="struct GstVideoCodecState"><span class="type">GstVideoCodecState</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td><em class="parameter"><code>buf</code></em></td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-codec-state-unref"></a><h3>gst_video_codec_state_unref ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_video_codec_state_unref (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecState" title="struct GstVideoCodecState"><span class="type">GstVideoCodecState</span></a> *state</code></em>);</pre>
<p>
Decreases the refcount of the state. If the refcount reaches 0, the state
will be freed.
</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>state</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideoutils.html#GstVideoCodecState" title="struct GstVideoCodecState"><span class="type">GstVideoCodecState</span></a>
</td>
</tr></tbody>
</table></div>
</div>
</div>
</div>
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