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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>GstAppSrc: GStreamer Base Plugins 1.0 Library Reference Manual</title>
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<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
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<link rel="home" href="index.html" title="GStreamer Base Plugins 1.0 Library Reference Manual">
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<link rel="up" href="gstreamer-app.html" title="App Library">
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<link rel="prev" href="gstreamer-app.html" title="App Library">
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<link rel="next" href="gst-plugins-base-libs-appsink.html" title="GstAppSink">
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<meta name="generator" content="GTK-Doc V1.27 (XML mode)">
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<link rel="stylesheet" href="style.css" type="text/css">
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</head>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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Description
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GstAppSrc
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GstAppSrc — Easy way for applications to inject buffers into a
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pipeline
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Functions
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void
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gst_app_src_set_caps ()
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GstCaps *
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gst_app_src_get_caps ()
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void
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gst_app_src_get_latency ()
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void
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gst_app_src_set_latency ()
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void
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gst_app_src_set_size ()
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gint64
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gst_app_src_get_size ()
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void
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gst_app_src_set_duration ()
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GstClockTime
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gst_app_src_get_duration ()
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void
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gst_app_src_set_stream_type ()
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GstAppStreamType
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gst_app_src_get_stream_type ()
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void
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gst_app_src_set_max_bytes ()
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guint64
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gst_app_src_get_max_bytes ()
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guint64
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gst_app_src_get_current_level_bytes ()
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gboolean
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gst_app_src_get_emit_signals ()
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void
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gst_app_src_set_emit_signals ()
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void
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gst_app_src_set_callbacks ()
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GstFlowReturn
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gst_app_src_push_buffer ()
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GstFlowReturn
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gst_app_src_push_buffer_list ()
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GstFlowReturn
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gst_app_src_push_sample ()
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GstFlowReturn
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gst_app_src_end_of_stream ()
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Types and Values
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enum
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GstAppStreamType
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GstAppSrcCallbacks
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Includes
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#include <gst/app/gstappsrc.h>
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Description
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The appsrc element can be used by applications to insert data into a
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GStreamer pipeline. Unlike most GStreamer elements, appsrc provides
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external API functions.
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appsrc can be used by linking with the libgstapp library to access the
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methods directly or by using the appsrc action signals.
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Before operating appsrc, the caps property must be set to fixed caps
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describing the format of the data that will be pushed with appsrc. An
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exception to this is when pushing buffers with unknown caps, in which case no
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caps should be set. This is typically true of file-like sources that push raw
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byte buffers. If you don't want to explicitly set the caps, you can use
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gst_app_src_push_sample. This method gets the caps associated with the
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sample and sets them on the appsrc replacing any previously set caps (if
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different from sample's caps).
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The main way of handing data to the appsrc element is by calling the
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gst_app_src_push_buffer() method or by emitting the push-buffer action signal.
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This will put the buffer onto a queue from which appsrc will read from in its
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streaming thread. It is important to note that data transport will not happen
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from the thread that performed the push-buffer call.
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The "max-bytes" property controls how much data can be queued in appsrc
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before appsrc considers the queue full. A filled internal queue will always
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signal the "enough-data" signal, which signals the application that it should
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stop pushing data into appsrc. The "block" property will cause appsrc to
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block the push-buffer method until free data becomes available again.
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When the internal queue is running out of data, the "need-data" signal is
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emitted, which signals the application that it should start pushing more data
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into appsrc.
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In addition to the "need-data" and "enough-data" signals, appsrc can emit the
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"seek-data" signal when the "stream-mode" property is set to "seekable" or
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"random-access". The signal argument will contain the new desired position in
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the stream expressed in the unit set with the "format" property. After
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receiving the seek-data signal, the application should push-buffers from the
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new position.
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These signals allow the application to operate the appsrc in two different
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ways:
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The push mode, in which the application repeatedly calls the push-buffer/push-sample
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method with a new buffer/sample. Optionally, the queue size in the appsrc
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can be controlled with the enough-data and need-data signals by respectively
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stopping/starting the push-buffer/push-sample calls. This is a typical
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mode of operation for the stream-type "stream" and "seekable". Use this
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mode when implementing various network protocols or hardware devices.
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The pull mode, in which the need-data signal triggers the next push-buffer call.
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This mode is typically used in the "random-access" stream-type. Use this
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mode for file access or other randomly accessable sources. In this mode, a
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buffer of exactly the amount of bytes given by the need-data signal should be
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pushed into appsrc.
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In all modes, the size property on appsrc should contain the total stream
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size in bytes. Setting this property is mandatory in the random-access mode.
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For the stream and seekable modes, setting this property is optional but
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recommended.
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When the application has finished pushing data into appsrc, it should call
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gst_app_src_end_of_stream() or emit the end-of-stream action signal. After
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this call, no more buffers can be pushed into appsrc until a flushing seek
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occurs or the state of the appsrc has gone through READY.
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Functions
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gst_app_src_set_caps ()
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void
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gst_app_src_set_caps (GstAppSrc *appsrc,
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const GstCaps *caps);
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Set the capabilities on the appsrc element. This function takes
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a copy of the caps structure. After calling this method, the source will
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only produce caps that match caps
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. caps
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must be fixed and the caps on the
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buffers must match the caps or left NULL.
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Parameters
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appsrc
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a GstAppSrc
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caps
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caps to set
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gst_app_src_get_caps ()
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GstCaps *
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gst_app_src_get_caps (GstAppSrc *appsrc);
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Get the configured caps on appsrc
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.
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Parameters
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appsrc
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a GstAppSrc
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Returns
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the GstCaps produced by the source. gst_caps_unref() after usage.
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gst_app_src_get_latency ()
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void
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gst_app_src_get_latency (GstAppSrc *appsrc,
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guint64 *min,
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guint64 *max);
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Retrieve the min and max latencies in min
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and max
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respectively.
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Parameters
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appsrc
|
|
Packit |
971217 |
a GstAppSrc
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
min
|
|
Packit |
971217 |
the min latency.
|
|
Packit |
971217 |
[out]
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
max
|
|
Packit |
971217 |
the max latency.
|
|
Packit |
971217 |
[out]
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_app_src_set_latency ()
|
|
Packit |
971217 |
void
|
|
Packit |
971217 |
gst_app_src_set_latency (GstAppSrc *appsrc,
|
|
Packit |
971217 |
guint64 min,
|
|
Packit |
971217 |
guint64 max);
|
|
Packit |
971217 |
Configure the min
|
|
Packit |
971217 |
and max
|
|
Packit |
971217 |
latency in src
|
|
Packit |
971217 |
. If min
|
|
Packit |
971217 |
is set to -1, the
|
|
Packit |
971217 |
default latency calculations for pseudo-live sources will be used.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
appsrc
|
|
Packit |
971217 |
a GstAppSrc
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
min
|
|
Packit |
971217 |
the min latency
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
max
|
|
Packit |
971217 |
the max latency
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_app_src_set_size ()
|
|
Packit |
971217 |
void
|
|
Packit |
971217 |
gst_app_src_set_size (GstAppSrc *appsrc,
|
|
Packit |
971217 |
gint64 size);
|
|
Packit |
971217 |
Set the size of the stream in bytes. A value of -1 means that the size is
|
|
Packit |
971217 |
not known.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
appsrc
|
|
Packit |
971217 |
a GstAppSrc
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
size
|
|
Packit |
971217 |
the size to set
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_app_src_get_size ()
|
|
Packit |
971217 |
gint64
|
|
Packit |
971217 |
gst_app_src_get_size (GstAppSrc *appsrc);
|
|
Packit |
971217 |
Get the size of the stream in bytes. A value of -1 means that the size is
|
|
Packit |
971217 |
not known.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
appsrc
|
|
Packit |
971217 |
a GstAppSrc
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
the size of the stream previously set with gst_app_src_set_size();
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_app_src_set_duration ()
|
|
Packit |
971217 |
void
|
|
Packit |
971217 |
gst_app_src_set_duration (GstAppSrc *appsrc,
|
|
Packit |
971217 |
GstClockTime duration);
|
|
Packit |
971217 |
Set the duration of the stream in nanoseconds. A value of GST_CLOCK_TIME_NONE means that the duration is
|
|
Packit |
971217 |
not known.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
appsrc
|
|
Packit |
971217 |
a GstAppSrc
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
duration
|
|
Packit |
971217 |
the duration to set
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Since: 1.10
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_app_src_get_duration ()
|
|
Packit |
971217 |
GstClockTime
|
|
Packit |
971217 |
gst_app_src_get_duration (GstAppSrc *appsrc);
|
|
Packit |
971217 |
Get the duration of the stream in nanoseconds. A value of GST_CLOCK_TIME_NONE means that the duration is
|
|
Packit |
971217 |
not known.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
appsrc
|
|
Packit |
971217 |
a GstAppSrc
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
the duration of the stream previously set with gst_app_src_set_duration();
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Since: 1.10
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_app_src_set_stream_type ()
|
|
Packit |
971217 |
void
|
|
Packit |
971217 |
gst_app_src_set_stream_type (GstAppSrc *appsrc,
|
|
Packit |
971217 |
GstAppStreamType type);
|
|
Packit |
971217 |
Set the stream type on appsrc
|
|
Packit |
971217 |
. For seekable streams, the "seek" signal must
|
|
Packit |
971217 |
be connected to.
|
|
Packit |
971217 |
A stream_type stream
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
appsrc
|
|
Packit |
971217 |
a GstAppSrc
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
type
|
|
Packit |
971217 |
the new state
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_app_src_get_stream_type ()
|
|
Packit |
971217 |
GstAppStreamType
|
|
Packit |
971217 |
gst_app_src_get_stream_type (GstAppSrc *appsrc);
|
|
Packit |
971217 |
Get the stream type. Control the stream type of appsrc
|
|
Packit |
971217 |
|
|
Packit |
971217 |
with gst_app_src_set_stream_type().
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
appsrc
|
|
Packit |
971217 |
a GstAppSrc
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
the stream type.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_app_src_set_max_bytes ()
|
|
Packit |
971217 |
void
|
|
Packit |
971217 |
gst_app_src_set_max_bytes (GstAppSrc *appsrc,
|
|
Packit |
971217 |
guint64 max);
|
|
Packit |
971217 |
Set the maximum amount of bytes that can be queued in appsrc
|
|
Packit |
971217 |
.
|
|
Packit |
971217 |
After the maximum amount of bytes are queued, appsrc
|
|
Packit |
971217 |
will emit the
|
|
Packit |
971217 |
"enough-data" signal.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
appsrc
|
|
Packit |
971217 |
a GstAppSrc
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
max
|
|
Packit |
971217 |
the maximum number of bytes to queue
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_app_src_get_max_bytes ()
|
|
Packit |
971217 |
guint64
|
|
Packit |
971217 |
gst_app_src_get_max_bytes (GstAppSrc *appsrc);
|
|
Packit |
971217 |
Get the maximum amount of bytes that can be queued in appsrc
|
|
Packit |
971217 |
.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
appsrc
|
|
Packit |
971217 |
a GstAppSrc
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
The maximum amount of bytes that can be queued.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_app_src_get_current_level_bytes ()
|
|
Packit |
971217 |
guint64
|
|
Packit |
971217 |
gst_app_src_get_current_level_bytes (GstAppSrc *appsrc);
|
|
Packit |
971217 |
Get the number of currently queued bytes inside appsrc
|
|
Packit |
971217 |
.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
appsrc
|
|
Packit |
971217 |
a GstAppSrc
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
The number of currently queued bytes.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Since: 1.2
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_app_src_get_emit_signals ()
|
|
Packit |
971217 |
gboolean
|
|
Packit |
971217 |
gst_app_src_get_emit_signals (GstAppSrc *appsrc);
|
|
Packit |
971217 |
Check if appsrc will emit the "new-preroll" and "new-buffer" signals.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
appsrc
|
|
Packit |
971217 |
a GstAppSrc
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
TRUE if appsrc
|
|
Packit |
971217 |
is emitting the "new-preroll" and "new-buffer"
|
|
Packit |
971217 |
signals.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_app_src_set_emit_signals ()
|
|
Packit |
971217 |
void
|
|
Packit |
971217 |
gst_app_src_set_emit_signals (GstAppSrc *appsrc,
|
|
Packit |
971217 |
gboolean emit);
|
|
Packit |
971217 |
Make appsrc emit the "new-preroll" and "new-buffer" signals. This option is
|
|
Packit |
971217 |
by default disabled because signal emission is expensive and unneeded when
|
|
Packit |
971217 |
the application prefers to operate in pull mode.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
appsrc
|
|
Packit |
971217 |
a GstAppSrc
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
emit
|
|
Packit |
971217 |
the new state
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_app_src_set_callbacks ()
|
|
Packit |
971217 |
void
|
|
Packit |
971217 |
gst_app_src_set_callbacks (GstAppSrc *appsrc,
|
|
Packit |
971217 |
GstAppSrcCallbacks *callbacks,
|
|
Packit |
971217 |
gpointer user_data,
|
|
Packit |
971217 |
GDestroyNotify notify);
|
|
Packit |
971217 |
Set callbacks which will be executed when data is needed, enough data has
|
|
Packit |
971217 |
been collected or when a seek should be performed.
|
|
Packit |
971217 |
This is an alternative to using the signals, it has lower overhead and is thus
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less expensive, but also less flexible.
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If callbacks are installed, no signals will be emitted for performance
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reasons.
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[skip]
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Parameters
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appsrc
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a GstAppSrc
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callbacks
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the callbacks
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user_data
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a user_data argument for the callbacks
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notify
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a destroy notify function
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gst_app_src_push_buffer ()
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GstFlowReturn
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gst_app_src_push_buffer (GstAppSrc *appsrc,
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GstBuffer *buffer);
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|
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971217 |
Adds a buffer to the queue of buffers that the appsrc element will
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|
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971217 |
push to its source pad. This function takes ownership of the buffer.
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971217 |
When the block property is TRUE, this function can block until free
|
|
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971217 |
space becomes available in the queue.
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Parameters
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appsrc
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a GstAppSrc
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buffer
|
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a GstBuffer to push.
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[transfer full]
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Returns
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GST_FLOW_OK when the buffer was successfuly queued.
|
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GST_FLOW_FLUSHING when appsrc
|
|
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is not PAUSED or PLAYING.
|
|
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GST_FLOW_EOS when EOS occured.
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gst_app_src_push_buffer_list ()
|
|
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GstFlowReturn
|
|
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gst_app_src_push_buffer_list (GstAppSrc *appsrc,
|
|
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971217 |
GstBufferList *buffer_list);
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|
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Adds a buffer list to the queue of buffers and buffer lists that the
|
|
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971217 |
appsrc element will push to its source pad. This function takes ownership
|
|
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971217 |
of buffer_list
|
|
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.
|
|
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When the block property is TRUE, this function can block until free
|
|
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space becomes available in the queue.
|
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Parameters
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appsrc
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|
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a GstAppSrc
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|
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|
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buffer_list
|
|
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a GstBufferList to push.
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|
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[transfer full]
|
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|
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Returns
|
|
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GST_FLOW_OK when the buffer list was successfuly queued.
|
|
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GST_FLOW_FLUSHING when appsrc
|
|
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is not PAUSED or PLAYING.
|
|
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GST_FLOW_EOS when EOS occured.
|
|
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|
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Since: 1.14
|
|
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|
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|
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|
|
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gst_app_src_push_sample ()
|
|
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GstFlowReturn
|
|
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gst_app_src_push_sample (GstAppSrc *appsrc,
|
|
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971217 |
GstSample *sample);
|
|
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971217 |
Extract a buffer from the provided sample and adds it to the queue of
|
|
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971217 |
buffers that the appsrc element will push to its source pad. Any
|
|
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971217 |
previous caps that were set on appsrc will be replaced by the caps
|
|
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971217 |
associated with the sample if not equal.
|
|
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971217 |
When the block property is TRUE, this function can block until free
|
|
Packit |
971217 |
space becomes available in the queue.
|
|
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|
|
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Parameters
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|
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appsrc
|
|
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971217 |
a GstAppSrc
|
|
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971217 |
|
|
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971217 |
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|
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|
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sample
|
|
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a GstSample from which buffer and caps may be
|
|
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971217 |
extracted.
|
|
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[transfer none]
|
|
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971217 |
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971217 |
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Returns
|
|
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971217 |
GST_FLOW_OK when the buffer was successfuly queued.
|
|
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971217 |
GST_FLOW_FLUSHING when appsrc
|
|
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971217 |
is not PAUSED or PLAYING.
|
|
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971217 |
GST_FLOW_EOS when EOS occured.
|
|
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971217 |
|
|
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971217 |
Since: 1.6
|
|
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971217 |
|
|
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971217 |
|
|
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971217 |
|
|
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971217 |
gst_app_src_end_of_stream ()
|
|
Packit |
971217 |
GstFlowReturn
|
|
Packit |
971217 |
gst_app_src_end_of_stream (GstAppSrc *appsrc);
|
|
Packit |
971217 |
Indicates to the appsrc element that the last buffer queued in the
|
|
Packit |
971217 |
element is the last buffer of the stream.
|
|
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971217 |
|
|
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971217 |
Parameters
|
|
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971217 |
|
|
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971217 |
|
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|
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971217 |
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|
|
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|
|
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971217 |
appsrc
|
|
Packit |
971217 |
a GstAppSrc
|
|
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971217 |
|
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971217 |
|
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971217 |
|
|
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|
|
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971217 |
Returns
|
|
Packit |
971217 |
GST_FLOW_OK when the EOS was successfuly queued.
|
|
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971217 |
GST_FLOW_FLUSHING when appsrc
|
|
Packit |
971217 |
is not PAUSED or PLAYING.
|
|
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971217 |
|
|
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Types and Values
|
|
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|
|
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971217 |
enum GstAppStreamType
|
|
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The stream type.
|
|
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971217 |
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|
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971217 |
Members
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|
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971217 |
GST_APP_STREAM_TYPE_STREAM
|
|
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971217 |
|
|
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971217 |
No seeking is supported in the stream, such as a
|
|
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971217 |
live stream.
|
|
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971217 |
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971217 |
|
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|
|
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971217 |
GST_APP_STREAM_TYPE_SEEKABLE
|
|
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971217 |
|
|
Packit |
971217 |
The stream is seekable but seeking might not
|
|
Packit |
971217 |
be very fast, such as data from a webserver.
|
|
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971217 |
|
|
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971217 |
|
|
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|
|
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|
|
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GST_APP_STREAM_TYPE_RANDOM_ACCESS
|
|
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971217 |
|
|
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971217 |
The stream is seekable and seeking is fast,
|
|
Packit |
971217 |
such as in a local file.
|
|
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|
|
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971217 |
GstAppSrcCallbacks
|
|
Packit |
971217 |
typedef struct {
|
|
Packit |
971217 |
void (*need_data) (GstAppSrc *src, guint length, gpointer user_data);
|
|
Packit |
971217 |
void (*enough_data) (GstAppSrc *src, gpointer user_data);
|
|
Packit |
971217 |
gboolean (*seek_data) (GstAppSrc *src, guint64 offset, gpointer user_data);
|
|
Packit |
971217 |
} GstAppSrcCallbacks;
|
|
Packit |
971217 |
|
|
Packit |
971217 |
A set of callbacks that can be installed on the appsrc with
|
|
Packit |
971217 |
gst_app_src_set_callbacks().
|
|
Packit |
971217 |
|
|
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971217 |
Members
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
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971217 |
|
|
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971217 |
|
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971217 |
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971217 |
|
|
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971217 |
|
|
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971217 |
|
|
Packit |
971217 |
need_data ()
|
|
Packit |
971217 |
Called when the appsrc needs more data. A buffer or EOS should be
|
|
Packit |
971217 |
pushed to appsrc from this thread or another thread. length
|
|
Packit |
971217 |
is just a hint
|
|
Packit |
971217 |
and when it is set to -1, any number of bytes can be pushed into appsrc
|
|
Packit |
971217 |
.
|
|
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971217 |
|
|
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971217 |
|
|
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971217 |
|
|
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971217 |
enough_data ()
|
|
Packit |
971217 |
Called when appsrc has enough data. It is recommended that the
|
|
Packit |
971217 |
application stops calling push-buffer until the need_data callback is
|
|
Packit |
971217 |
emitted again to avoid excessive buffer queueing.
|
|
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971217 |
|
|
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971217 |
|
|
Packit |
971217 |
|
|
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971217 |
seek_data ()
|
|
Packit |
971217 |
Called when a seek should be performed to the offset.
|
|
Packit |
971217 |
The next push-buffer should produce buffers from the new offset
|
|
Packit |
971217 |
.
|
|
Packit |
971217 |
This callback is only called for seekable stream types.
|
|
Packit |
971217 |
|
|
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971217 |
|
|
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971217 |
|
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971217 |
|
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971217 |
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971217 |
|
|
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971217 |
|
|
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971217 |
|
|
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971217 |
See Also
|
|
Packit |
971217 |
GstBaseSrc, appsink
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
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971217 |
|
|
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971217 |
Generated by GTK-Doc V1.27
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</body>
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</html>
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