2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2005 Wim Taymans <wim@fluendo.com>
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
23 /* a base class for audio sources.
26 #ifndef __GST_BASE_AUDIO_SRC_H__
27 #define __GST_BASE_AUDIO_SRC_H__
30 #include <gst/base/gstpushsrc.h>
31 #include "gstringbuffer.h"
32 #include "gstaudioclock.h"
36 #define GST_TYPE_BASE_AUDIO_SRC (gst_base_audio_src_get_type())
37 #define GST_BASE_AUDIO_SRC(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BASE_AUDIO_SRC,GstBaseAudioSrc))
38 #define GST_BASE_AUDIO_SRC_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BASE_AUDIO_SRC,GstBaseAudioSrcClass))
39 #define GST_BASE_AUDIO_SRC_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_BASE_AUDIO_SRC, GstBaseAudioSrcClass))
40 #define GST_IS_BASE_AUDIO_SRC(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BASE_AUDIO_SRC))
41 #define GST_IS_BASE_AUDIO_SRC_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BASE_AUDIO_SRC))
44 * GST_BASE_AUDIO_SRC_CLOCK:
45 * @obj: a #GstBaseAudioSrc
47 * Get the #GstClock of @obj.
49 #define GST_BASE_AUDIO_SRC_CLOCK(obj) (GST_BASE_AUDIO_SRC (obj)->clock)
51 * GST_BASE_AUDIO_SRC_PAD:
52 * @obj: a #GstBaseAudioSrc
54 * Get the source #GstPad of @obj.
56 #define GST_BASE_AUDIO_SRC_PAD(obj) (GST_BASE_SRC (obj)->srcpad)
58 typedef struct _GstBaseAudioSrc GstBaseAudioSrc;
59 typedef struct _GstBaseAudioSrcClass GstBaseAudioSrcClass;
60 typedef struct _GstBaseAudioSrcPrivate GstBaseAudioSrcPrivate;
63 * GstBaseAudioSrcSlaveMethod:
64 * @GST_BASE_AUDIO_SRC_SLAVE_RESAMPLE: Resample to match the master clock.
65 * @GST_BASE_AUDIO_SRC_SLAVE_RETIMESTAMP: Retimestamp output buffers with master
67 * @GST_BASE_AUDIO_SRC_SLAVE_SKEW: Adjust capture pointer when master clock
69 * @GST_BASE_AUDIO_SRC_SLAVE_NONE: No adjustment is done.
71 * Different possible clock slaving algorithms when the internal audio clock was
72 * not selected as the pipeline clock.
76 GST_BASE_AUDIO_SRC_SLAVE_RESAMPLE,
77 GST_BASE_AUDIO_SRC_SLAVE_RETIMESTAMP,
78 GST_BASE_AUDIO_SRC_SLAVE_SKEW,
79 GST_BASE_AUDIO_SRC_SLAVE_NONE
80 } GstBaseAudioSrcSlaveMethod;
82 #define GST_TYPE_BASE_AUDIO_SRC_SLAVE_METHOD (gst_base_audio_src_slave_method_get_type ())
87 * Opaque #GstBaseAudioSrc.
89 struct _GstBaseAudioSrc {
92 /*< protected >*/ /* with LOCK */
94 GstRingBuffer *ringbuffer;
96 /* required buffer and latency */
97 GstClockTime buffer_time;
98 GstClockTime latency_time;
100 /* the next sample to write */
107 GstBaseAudioSrcPrivate *priv;
109 gpointer _gst_reserved[GST_PADDING - 1];
113 * GstBaseAudioSrcClass:
114 * @parent_class: the parent class.
115 * @create_ringbuffer: create and return a #GstRingBuffer to read from.
117 * #GstBaseAudioSrc class. Override the vmethod to implement
120 struct _GstBaseAudioSrcClass {
121 GstPushSrcClass parent_class;
123 /* subclass ringbuffer allocation */
124 GstRingBuffer* (*create_ringbuffer) (GstBaseAudioSrc *src);
127 gpointer _gst_reserved[GST_PADDING];
130 GType gst_base_audio_src_get_type(void);
131 GType gst_base_audio_src_slave_method_get_type (void);
133 GstRingBuffer *gst_base_audio_src_create_ringbuffer (GstBaseAudioSrc *src);
135 void gst_base_audio_src_set_provide_clock (GstBaseAudioSrc *src, gboolean provide);
136 gboolean gst_base_audio_src_get_provide_clock (GstBaseAudioSrc *src);
138 void gst_base_audio_src_set_slave_method (GstBaseAudioSrc *src,
139 GstBaseAudioSrcSlaveMethod method);
140 GstBaseAudioSrcSlaveMethod
141 gst_base_audio_src_get_slave_method (GstBaseAudioSrc *src);
146 #endif /* __GST_BASE_AUDIO_SRC_H__ */