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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2005 Wim Taymans <wim@fluendo.com>
*
* gstaudiosink.h:
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_AUDIO_AUDIO_H__
#include <gst/audio/audio.h>
#endif
#ifndef __GST_AUDIO_SINK_H__
#define __GST_AUDIO_SINK_H__
#include <gst/gst.h>
#include <gst/audio/gstaudiobasesink.h>
G_BEGIN_DECLS
#define GST_TYPE_AUDIO_SINK (gst_audio_sink_get_type())
#define GST_AUDIO_SINK(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_SINK,GstAudioSink))
#define GST_AUDIO_SINK_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AUDIO_SINK,GstAudioSinkClass))
#define GST_AUDIO_SINK_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_AUDIO_SINK,GstAudioSinkClass))
#define GST_IS_AUDIO_SINK(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_SINK))
#define GST_IS_AUDIO_SINK_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AUDIO_SINK))
typedef struct _GstAudioSink GstAudioSink;
typedef struct _GstAudioSinkClass GstAudioSinkClass;
typedef struct _GstAudioSinkClassExtension GstAudioSinkClassExtension;
/**
* GstAudioSink:
*
* Opaque #GstAudioSink.
*/
struct _GstAudioSink {
GstAudioBaseSink element;
/*< private >*/ /* with LOCK */
GThread *thread;
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
/**
* GstAudioSinkClass:
* @parent_class: the parent class structure.
* @open: Open the device. No configuration needs to be done at this point.
* This function is also used to check if the device is available.
* @prepare: Prepare the device to operate with the specified parameters.
* @unprepare: Undo operations done in prepare.
* @close: Close the device.
* @write: Write data to the device.
* This vmethod is allowed to block until all the data is written.
* If such is the case then it is expected that pause, stop and
* reset will unblock the write when called.
* @delay: Return how many frames are still in the device. Participates in
* computing the time for audio clocks and drives the synchronisation.
* @reset: Returns as quickly as possible from a write and flush any pending
* samples from the device.
* This vmethod is deprecated. Please provide pause and stop instead.
* @pause: Pause the device and unblock write as fast as possible.
* For retro compatibility, the audio sink will fallback
* to calling reset if this vmethod is not provided. Since: 1.18
* @resume: Resume the device. Since: 1.18
* @stop: Stop the device and unblock write as fast as possible.
* Pending samples are flushed from the device.
* For retro compatibility, the audio sink will fallback
* to calling reset if this vmethod is not provided. Since: 1.18
* @extension: class extension structure. Since: 1.18
*/
struct _GstAudioSinkClass {
GstAudioBaseSinkClass parent_class;
/* vtable */
/* open the device with given specs */
gboolean (*open) (GstAudioSink *sink);
/* prepare resources and state to operate with the given specs */
gboolean (*prepare) (GstAudioSink *sink, GstAudioRingBufferSpec *spec);
/* undo anything that was done in prepare() */
gboolean (*unprepare) (GstAudioSink *sink);
/* close the device */
gboolean (*close) (GstAudioSink *sink);
/* write samples to the device */
gint (*write) (GstAudioSink *sink, gpointer data, guint length);
/* get number of frames queued in the device */
guint (*delay) (GstAudioSink *sink);
/* deprecated: reset the audio device, unblock from a write */
void (*reset) (GstAudioSink *sink);
/* pause the audio device, unblock from a write */
void (*pause) (GstAudioSink *sink);
/* resume the audio device */
void (*resume) (GstAudioSink *sink);
/* stop the audio device, unblock from a write */
void (*stop) (GstAudioSink *sink);
GstAudioSinkClassExtension *extension;
};
/**
* GstAudioSinkClassExtension:
* @clear-all: Clear the device. Since: 1.18
*/
struct _GstAudioSinkClassExtension
{
/* clear the audio device */
void (*clear_all) (GstAudioSink *sink);
/* no padding needed */
};
GST_AUDIO_API
GType gst_audio_sink_get_type(void);
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstAudioSink, gst_object_unref)
G_END_DECLS
#endif /* __GST_AUDIO_SINK_H__ */
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