gstreamer/gst-libs/gst/audio/gstaudiosink.h

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An attempt at a set of audio base classes together with some design docs. Original commit message from CVS: * docs/design-audiosinks.txt: * gst-libs/gst/audio/Makefile.am: * gst-libs/gst/audio/TODO: * gst-libs/gst/audio/gstaudiosink.c: (gst_audioringbuffer_get_type), (gst_audioringbuffer_class_init), (audioringbuffer_thread_func), (gst_audioringbuffer_init), (gst_audioringbuffer_dispose), (gst_audioringbuffer_finalize), (gst_audioringbuffer_acquire), (gst_audioringbuffer_release), (gst_audioringbuffer_play), (gst_audioringbuffer_stop), (gst_audioringbuffer_delay), (gst_audiosink_base_init), (gst_audiosink_class_init), (gst_audiosink_init), (gst_audiosink_create_ringbuffer): * gst-libs/gst/audio/gstaudiosink.h: * gst-libs/gst/audio/gstbaseaudiosink.c: (gst_baseaudiosink_base_init), (gst_baseaudiosink_class_init), (gst_baseaudiosink_init), (gst_baseaudiosink_set_property), (gst_baseaudiosink_get_property), (gst_baseaudiosink_setcaps), (gst_baseaudiosink_get_times), (gst_baseaudiosink_event), (gst_baseaudiosink_preroll), (gst_baseaudiosink_render), (gst_baseaudiosink_create_ringbuffer), (gst_baseaudiosink_callback), (gst_baseaudiosink_change_state): * gst-libs/gst/audio/gstbaseaudiosink.h: * gst-libs/gst/audio/gstringbuffer.c: (gst_ringbuffer_get_type), (gst_ringbuffer_class_init), (gst_ringbuffer_init), (gst_ringbuffer_dispose), (gst_ringbuffer_finalize), (gst_ringbuffer_set_callback), (gst_ringbuffer_acquire), (gst_ringbuffer_release), (gst_ringbuffer_play_unlocked), (gst_ringbuffer_play), (gst_ringbuffer_pause), (gst_ringbuffer_resume), (gst_ringbuffer_stop), (gst_ringbuffer_callback), (gst_ringbuffer_delay), (gst_ringbuffer_played_samples), (gst_ringbuffer_commit), (gst_ringbuffer_prepare_read), (gst_ringbuffer_clear): * gst-libs/gst/audio/gstringbuffer.h: An attempt at a set of audio base classes together with some design docs.
2005-04-20 10:19:54 +00:00
/* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* a base class for simple audio sinks.
*
* This base class only requires subclasses to implement a set
* of simple functions.
*
* - open: open the device with the specified caps
* - write: write the samples to the audio device
* - close: close the device
* - delay: the number of samples queued in the device
* - reset: unblock a write to the device and reset.
*
* All scheduling of samples and timestamps is done in this
* base class together with the GstBaseAudioSink using a
* default implementation of a ringbuffer that uses threads.
*/
#ifndef __GST_AUDIOSINK_H__
#define __GST_AUDIOSINK_H__
#include <gst/gst.h>
#include "gstbaseaudiosink.h"
G_BEGIN_DECLS
#define GST_TYPE_AUDIOSINK (gst_audiosink_get_type())
#define GST_AUDIOSINK(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIOSINK,GstAudioSink))
#define GST_AUDIOSINK_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AUDIOSINK,GstAudioSinkClass))
#define GST_AUDIOSINK_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_AUDIOSINK,GstAudioSinkClass))
#define GST_IS_AUDIOSINK(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIOSINK))
#define GST_IS_AUDIOSINK_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AUDIOSINK))
typedef struct _GstAudioSink GstAudioSink;
typedef struct _GstAudioSinkClass GstAudioSinkClass;
struct _GstAudioSink {
GstBaseAudioSink element;
/*< private >*/ /* with LOCK */
GThread *thread;
};
struct _GstAudioSinkClass {
GstBaseAudioSinkClass parent_class;
/* vtable */
/* open the device with given specs */
gboolean (*open) (GstAudioSink *sink, GstRingBufferSpec *spec);
/* close the device */
gboolean (*close) (GstAudioSink *sink);
/* write samples to the device */
guint (*write) (GstAudioSink *sink, gpointer data, guint length);
/* get number of samples queued in the device */
guint (*delay) (GstAudioSink *sink);
/* reset the audio device, unblock from a write */
void (*reset) (GstAudioSink *sink);
};
GType gst_audiosink_get_type(void);
G_END_DECLS
#endif /* __GST_AUDIOSINK_H__ */