1 /* GStreamer
2  * Copyright (C)  2005 Wim Taymans <wim@fluendo.com>
3  *
4  * gstalsasrc.h:
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Library General Public
8  * License as published by the Free Software Foundation; either
9  * version 2 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Library General Public License for more details.
15  *
16  * You should have received a copy of the GNU Library General Public
17  * License along with this library; if not, write to the
18  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
19  * Boston, MA 02110-1301, USA.
20  */
21 
22 
23 #ifndef __GST_ALSASRC_H__
24 #define __GST_ALSASRC_H__
25 
26 #include <gst/audio/audio.h>
27 #include "gstalsa.h"
28 
29 G_BEGIN_DECLS
30 
31 #define GST_TYPE_ALSA_SRC            (gst_alsasrc_get_type())
32 #define GST_ALSA_SRC(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ALSA_SRC,GstAlsaSrc))
33 #define GST_ALSA_SRC_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ALSA_SRC,GstAlsaSrcClass))
34 #define GST_IS_ALSA_SRC(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ALSA_SRC))
35 #define GST_IS_ALSA_SRC_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ALSA_SRC))
36 #define GST_ALSA_SRC_CAST(obj)       ((GstAlsaSrc *)(obj))
37 
38 #define GST_ALSA_SRC_GET_LOCK(obj)  (&GST_ALSA_SRC_CAST (obj)->alsa_lock)
39 #define GST_ALSA_SRC_LOCK(obj)      (g_mutex_lock (GST_ALSA_SRC_GET_LOCK (obj)))
40 #define GST_ALSA_SRC_UNLOCK(obj)    (g_mutex_unlock (GST_ALSA_SRC_GET_LOCK (obj)))
41 
42 typedef struct _GstAlsaSrc GstAlsaSrc;
43 typedef struct _GstAlsaSrcClass GstAlsaSrcClass;
44 
45 /**
46  * GstAlsaSrc:
47  *
48  * Opaque data structure
49  */
50 struct _GstAlsaSrc {
51   GstAudioSrc           src;
52 
53   gchar                 *device;
54 
55   snd_pcm_t             *handle;
56   snd_pcm_hw_params_t   *hwparams;
57   snd_pcm_sw_params_t   *swparams;
58 
59   GstCaps               *cached_caps;
60 
61   snd_pcm_access_t      access;
62   snd_pcm_format_t      format;
63   guint                 rate;
64   guint                 channels;
65   gint                  bpf;
66   gboolean              driver_timestamps;
67 
68   guint                 buffer_time;
69   guint                 period_time;
70   snd_pcm_uframes_t     buffer_size;
71   snd_pcm_uframes_t     period_size;
72 
73   GMutex                alsa_lock;
74 };
75 
76 struct _GstAlsaSrcClass {
77   GstAudioSrcClass parent_class;
78 };
79 
80 GType gst_alsasrc_get_type(void);
81 
82 G_END_DECLS
83 
84 #endif /* __GST_ALSASRC_H__ */
85