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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2005 Wim Taymans <wim@fluendo.com>
*
* gstaudiosrc.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_SRC_H__
#define __GST_AUDIO_SRC_H__
#include <gst/gst.h>
#include <gst/audio/gstaudiobasesrc.h>
G_BEGIN_DECLS
#define GST_TYPE_AUDIO_SRC (gst_audio_src_get_type())
#define GST_AUDIO_SRC(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_SRC,GstAudioSrc))
#define GST_AUDIO_SRC_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AUDIO_SRC,GstAudioSrcClass))
#define GST_AUDIO_SRC_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_AUDIO_SRC,GstAudioSrcClass))
#define GST_IS_AUDIO_SRC(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_SRC))
#define GST_IS_AUDIO_SRC_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AUDIO_SRC))
typedef struct _GstAudioSrc GstAudioSrc;
typedef struct _GstAudioSrcClass GstAudioSrcClass;
/**
* GstAudioSrc:
*
* Base class for simple audio sources.
*/
struct _GstAudioSrc {
GstAudioBaseSrc element;
/*< private >*/ /* with LOCK */
GThread *thread;
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
/**
* GstAudioSrcClass:
* @parent_class: the parent class.
* @open: open the device with the specified caps
* @prepare: configure device with format
* @unprepare: undo the configuration
* @close: close the device
* @read: read samples from the audio device
* @delay: the number of frames queued in the device
* @reset: unblock a read to the device and reset.
*
* #GstAudioSrc class. Override the vmethod to implement
* functionality.
*/
struct _GstAudioSrcClass {
GstAudioBaseSrcClass parent_class;
/* vtable */
/* open the device with given specs */
gboolean (*open) (GstAudioSrc *src);
/* prepare resources and state to operate with the given specs */
gboolean (*prepare) (GstAudioSrc *src, GstAudioRingBufferSpec *spec);
/* undo anything that was done in prepare() */
gboolean (*unprepare) (GstAudioSrc *src);
/* close the device */
gboolean (*close) (GstAudioSrc *src);
/* read samples from the device */
guint (*read) (GstAudioSrc *src, gpointer data, guint length,
GstClockTime *timestamp);
/* get number of frames queued in the device */
guint (*delay) (GstAudioSrc *src);
/* reset the audio device, unblock from a write */
void (*reset) (GstAudioSrc *src);
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
GST_EXPORT
GType gst_audio_src_get_type(void);
#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstAudioSrc, gst_object_unref)
#endif
G_END_DECLS
#endif /* __GST_AUDIO_SRC_H__ */
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