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c6722c06a0
The _pull_sample() and _pull_preroll() functions block until a sample is available, EOS happens or the pipeline is shut down (returning NULL in the last two cases). This adds _try_pull_sample() and _try_pull_preroll() functions with a timeout argument to specify the maximum amount of time to wait for a new sample. To avoid code duplication, wait forever if the timeout is GST_CLOCK_TIME_NONE and use that to implement _pull_sample/_pull_preroll with the original behavior. Add also corresponding action signals "try-pull-sample" and "try-pull-preroll". https://bugzilla.gnome.org/show_bug.cgi?id=768852
140 lines
5 KiB
C
140 lines
5 KiB
C
/* GStreamer
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* Copyright (C) 2007 David Schleef <ds@schleef.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef _GST_APP_SINK_H_
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#define _GST_APP_SINK_H_
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#include <gst/gst.h>
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#include <gst/base/gstbasesink.h>
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G_BEGIN_DECLS
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#define GST_TYPE_APP_SINK \
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(gst_app_sink_get_type())
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#define GST_APP_SINK(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_APP_SINK,GstAppSink))
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#define GST_APP_SINK_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_APP_SINK,GstAppSinkClass))
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#define GST_IS_APP_SINK(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_APP_SINK))
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#define GST_IS_APP_SINK_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_APP_SINK))
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#define GST_APP_SINK_CAST(obj) \
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((GstAppSink*)(obj))
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typedef struct _GstAppSink GstAppSink;
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typedef struct _GstAppSinkClass GstAppSinkClass;
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typedef struct _GstAppSinkPrivate GstAppSinkPrivate;
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/* FIXME 2.0: Make the instance/class struct private */
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/**
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* GstAppSinkCallbacks: (skip)
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* @eos: Called when the end-of-stream has been reached. This callback
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* is called from the streaming thread.
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* @new_preroll: Called when a new preroll sample is available.
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* This callback is called from the streaming thread.
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* The new preroll sample can be retrieved with
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* gst_app_sink_pull_preroll() either from this callback
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* or from any other thread.
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* @new_sample: Called when a new sample is available.
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* This callback is called from the streaming thread.
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* The new sample can be retrieved with
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* gst_app_sink_pull_sample() either from this callback
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* or from any other thread.
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*
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* A set of callbacks that can be installed on the appsink with
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* gst_app_sink_set_callbacks().
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*/
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typedef struct {
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void (*eos) (GstAppSink *appsink, gpointer user_data);
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GstFlowReturn (*new_preroll) (GstAppSink *appsink, gpointer user_data);
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GstFlowReturn (*new_sample) (GstAppSink *appsink, gpointer user_data);
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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} GstAppSinkCallbacks;
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struct _GstAppSink
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{
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GstBaseSink basesink;
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/*< private >*/
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GstAppSinkPrivate *priv;
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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struct _GstAppSinkClass
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{
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GstBaseSinkClass basesink_class;
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/* signals */
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void (*eos) (GstAppSink *appsink);
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GstFlowReturn (*new_preroll) (GstAppSink *appsink);
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GstFlowReturn (*new_sample) (GstAppSink *appsink);
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/* actions */
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GstSample * (*pull_preroll) (GstAppSink *appsink);
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GstSample * (*pull_sample) (GstAppSink *appsink);
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GstSample * (*try_pull_preroll) (GstAppSink *appsink, GstClockTime timeout);
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GstSample * (*try_pull_sample) (GstAppSink *appsink, GstClockTime timeout);
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING - 2];
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};
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GType gst_app_sink_get_type(void);
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void gst_app_sink_set_caps (GstAppSink *appsink, const GstCaps *caps);
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GstCaps * gst_app_sink_get_caps (GstAppSink *appsink);
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gboolean gst_app_sink_is_eos (GstAppSink *appsink);
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void gst_app_sink_set_emit_signals (GstAppSink *appsink, gboolean emit);
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gboolean gst_app_sink_get_emit_signals (GstAppSink *appsink);
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void gst_app_sink_set_max_buffers (GstAppSink *appsink, guint max);
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guint gst_app_sink_get_max_buffers (GstAppSink *appsink);
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void gst_app_sink_set_drop (GstAppSink *appsink, gboolean drop);
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gboolean gst_app_sink_get_drop (GstAppSink *appsink);
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void gst_app_sink_set_wait_on_eos (GstAppSink *appsink, gboolean wait);
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gboolean gst_app_sink_get_wait_on_eos (GstAppSink *appsink);
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GstSample * gst_app_sink_pull_preroll (GstAppSink *appsink);
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GstSample * gst_app_sink_pull_sample (GstAppSink *appsink);
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GstSample * gst_app_sink_try_pull_preroll (GstAppSink *appsink, GstClockTime timeout);
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GstSample * gst_app_sink_try_pull_sample (GstAppSink *appsink, GstClockTime timeout);
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void gst_app_sink_set_callbacks (GstAppSink * appsink,
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GstAppSinkCallbacks *callbacks,
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gpointer user_data,
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GDestroyNotify notify);
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#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstAppSink, gst_object_unref)
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#endif
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G_END_DECLS
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#endif
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