1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstosxaudiosrc.c:
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <CoreAudio/CoreAudio.h>
#include <gstosxaudiosrc.h>
#include <gstosxaudioelement.h>
/* elementfactory information */
static GstElementDetails gst_osxaudiosrc_details =
GST_ELEMENT_DETAILS ("Audio Source (Mac OS X)",
"Source/Audio",
"Read from the sound card",
"Zaheer Abbas Merali <zaheerabbas at merali.org>");
/* Osxaudiosrc signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
static GstStaticPadTemplate osxaudiosrc_src_factory =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-float, "
"endianness = (int) BYTE_ORDER, "
"signed = (boolean) TRUE , "
"width = (int) 32, " "rate = (int) 44100, " "channels = (int) 2")
);
static void gst_osxaudiosrc_base_init (gpointer g_class);
static void gst_osxaudiosrc_class_init (GstOsxAudioSrcClass * klass);
static void gst_osxaudiosrc_init (GstOsxAudioSrc * osxaudiosrc);
static void gst_osxaudiosrc_dispose (GObject * object);
static GstElementStateReturn gst_osxaudiosrc_change_state (GstElement *
element);
static GstData *gst_osxaudiosrc_get (GstPad * pad);
static GstElementClass *parent_class = NULL;
/*static guint gst_osxaudiosrc_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_osxaudiosrc_get_type (void)
{
static GType osxaudiosrc_type = 0;
if (!osxaudiosrc_type) {
static const GTypeInfo osxaudiosrc_info = {
sizeof (GstOsxAudioSrcClass),
gst_osxaudiosrc_base_init,
NULL,
(GClassInitFunc) gst_osxaudiosrc_class_init,
NULL,
NULL,
sizeof (GstOsxAudioSrc),
0,
(GInstanceInitFunc) gst_osxaudiosrc_init,
};
osxaudiosrc_type =
g_type_register_static (GST_TYPE_OSXAUDIOELEMENT, "GstOsxAudioSrc",
&osxaudiosrc_info, 0);
}
return osxaudiosrc_type;
}
static void
gst_osxaudiosrc_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &gst_osxaudiosrc_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&osxaudiosrc_src_factory));
}
static void
gst_osxaudiosrc_class_init (GstOsxAudioSrcClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_OSXAUDIOELEMENT);
gobject_class->dispose = gst_osxaudiosrc_dispose;
gstelement_class->change_state = gst_osxaudiosrc_change_state;
}
static void
gst_osxaudiosrc_init (GstOsxAudioSrc * osxaudiosrc)
{
osxaudiosrc->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&osxaudiosrc_src_factory), "src");
gst_pad_set_get_function (osxaudiosrc->srcpad, gst_osxaudiosrc_get);
gst_element_add_pad (GST_ELEMENT (osxaudiosrc), osxaudiosrc->srcpad);
}
static void
gst_osxaudiosrc_dispose (GObject * object)
{
/* GstOsxAudioSrc *osxaudiosrc = (GstOsxAudioSrc *) object; */
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static GstData *
gst_osxaudiosrc_get (GstPad * pad)
{
GstOsxAudioSrc *src;
GstBuffer *buf;
glong readbytes;
src = GST_OSXAUDIOSRC (gst_pad_get_parent (pad));
buf = gst_buffer_new_and_alloc ((GST_OSXAUDIOELEMENT (src))->buffer_len);
readbytes =
read_buffer (GST_OSXAUDIOELEMENT (src), (char *) GST_BUFFER_DATA (buf));
if (readbytes < 0) {
gst_buffer_unref (buf);
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL), GST_ERROR_SYSTEM);
return GST_DATA (gst_event_new (GST_EVENT_INTERRUPT));
}
if (readbytes == 0) {
gst_buffer_unref (buf);
return GST_DATA (gst_event_new (GST_EVENT_INTERRUPT));
}
GST_BUFFER_SIZE (buf) = readbytes;
GST_BUFFER_OFFSET (buf) = src->curoffset;
src->curoffset += readbytes;
GST_DEBUG ("pushed buffer from soundcard of %ld bytes", readbytes);
return GST_DATA (buf);
}
static GstElementStateReturn
gst_osxaudiosrc_change_state (GstElement * element)
{
GstOsxAudioSrc *osxaudiosrc = GST_OSXAUDIOSRC (element);
OSErr status;
GST_DEBUG ("osxaudiosrc: state change");
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_READY_TO_PAUSED:
osxaudiosrc->curoffset = 0;
break;
case GST_STATE_PAUSED_TO_PLAYING:
status =
AudioDeviceStart (GST_OSXAUDIOELEMENT (osxaudiosrc)->device_id,
inputAudioDeviceIOProc);
if (status)
GST_DEBUG ("AudioDeviceStart returned %d\n", (int) status);
break;
case GST_STATE_PLAYING_TO_PAUSED:
status =
AudioDeviceStop (GST_OSXAUDIOELEMENT (osxaudiosrc)->device_id,
inputAudioDeviceIOProc);
if (status)
GST_DEBUG ("AudioDeviceStop returned %d\n", (int) status);
break;
case GST_STATE_PAUSED_TO_READY:
break;
default:
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
|
