2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wtay@chello.be>
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 #include <sys/types.h>
26 #include <sys/soundcard.h>
27 #include <sys/ioctl.h>
30 #include <gstaudiosrc.h>
33 GstElementDetails gst_audiosrc_details = {
36 "Read from the sound card",
38 "Erik Walthinsen <omega@cse.ogi.edu>",
43 /* AudioSrc signals and args */
59 static void gst_audiosrc_class_init (GstAudioSrcClass *klass);
60 static void gst_audiosrc_init (GstAudioSrc *audiosrc);
62 static void gst_audiosrc_set_arg (GtkObject *object, GtkArg *arg, guint id);
63 static void gst_audiosrc_get_arg (GtkObject *object, GtkArg *arg, guint id);
64 static GstElementStateReturn gst_audiosrc_change_state (GstElement *element);
66 static void gst_audiosrc_close_audio (GstAudioSrc *src);
67 static gboolean gst_audiosrc_open_audio (GstAudioSrc *src);
68 static void gst_audiosrc_sync_parms (GstAudioSrc *audiosrc);
70 static GstBuffer * gst_audiosrc_get (GstPad *pad);
72 static GstElementClass *parent_class = NULL;
73 //static guint gst_audiosrc_signals[LAST_SIGNAL] = { 0 };
76 gst_audiosrc_get_type (void)
78 static GtkType audiosrc_type = 0;
81 static const GtkTypeInfo audiosrc_info = {
84 sizeof(GstAudioSrcClass),
85 (GtkClassInitFunc)gst_audiosrc_class_init,
86 (GtkObjectInitFunc)gst_audiosrc_init,
87 (GtkArgSetFunc)gst_audiosrc_set_arg,
88 (GtkArgGetFunc)gst_audiosrc_get_arg,
89 (GtkClassInitFunc)NULL,
91 audiosrc_type = gtk_type_unique (GST_TYPE_ELEMENT, &audiosrc_info);
97 gst_audiosrc_class_init (GstAudioSrcClass *klass)
99 GtkObjectClass *gtkobject_class;
100 GstElementClass *gstelement_class;
102 gtkobject_class = (GtkObjectClass*)klass;
103 gstelement_class = (GstElementClass*)klass;
105 parent_class = gtk_type_class (GST_TYPE_ELEMENT);
107 gtk_object_add_arg_type ("GstAudioSrc::bytes_per_read", GTK_TYPE_ULONG,
108 GTK_ARG_READWRITE, ARG_BYTESPERREAD);
109 gtk_object_add_arg_type ("GstAudioSrc::curoffset", GTK_TYPE_ULONG,
110 GTK_ARG_READABLE, ARG_CUROFFSET);
111 gtk_object_add_arg_type ("GstAudioSrc::format", GTK_TYPE_INT,
112 GTK_ARG_READWRITE, ARG_FORMAT);
113 gtk_object_add_arg_type ("GstAudioSrc::channels", GTK_TYPE_INT,
114 GTK_ARG_READWRITE, ARG_CHANNELS);
115 gtk_object_add_arg_type ("GstAudioSrc::frequency", GTK_TYPE_INT,
116 GTK_ARG_READWRITE, ARG_FREQUENCY);
118 gtkobject_class->set_arg = gst_audiosrc_set_arg;
119 gtkobject_class->get_arg = gst_audiosrc_get_arg;
121 gstelement_class->change_state = gst_audiosrc_change_state;
125 gst_audiosrc_init (GstAudioSrc *audiosrc)
127 audiosrc->srcpad = gst_pad_new ("src", GST_PAD_SRC);
128 gst_pad_set_get_function(audiosrc->srcpad,gst_audiosrc_get);
129 gst_element_add_pad (GST_ELEMENT (audiosrc), audiosrc->srcpad);
133 // audiosrc->meta = (MetaAudioRaw *)gst_meta_new();
134 // audiosrc->meta->format = AFMT_S16_LE;
135 // audiosrc->meta->channels = 2;
136 // audiosrc->meta->frequency = 44100;
137 // audiosrc->meta->bps = 4;
139 audiosrc->bytes_per_read = 4096;
140 audiosrc->curoffset = 0;
145 gst_audiosrc_get (GstPad *pad)
151 g_return_val_if_fail (pad != NULL, NULL);
152 src = GST_AUDIOSRC(gst_pad_get_parent (pad));
154 // g_print("attempting to read something from soundcard\n");
156 buf = gst_buffer_new ();
157 g_return_val_if_fail (buf, NULL);
159 GST_BUFFER_DATA (buf) = (gpointer)g_malloc (src->bytes_per_read);
161 readbytes = read (src->fd,GST_BUFFER_DATA (buf),
162 src->bytes_per_read);
164 if (readbytes == 0) {
165 gst_element_signal_eos (GST_ELEMENT (src));
169 GST_BUFFER_SIZE (buf) = readbytes;
170 GST_BUFFER_OFFSET (buf) = src->curoffset;
172 src->curoffset += readbytes;
174 // gst_buffer_add_meta(buf,GST_META(newmeta));
176 // g_print("pushed buffer from soundcard of %d bytes\n",readbytes);
181 gst_audiosrc_set_arg (GtkObject *object, GtkArg *arg, guint id)
185 /* it's not null if we got it, but it might not be ours */
186 g_return_if_fail (GST_IS_AUDIOSRC (object));
188 src = GST_AUDIOSRC (object);
191 case ARG_BYTESPERREAD:
192 src->bytes_per_read = GTK_VALUE_INT (*arg);
195 src->format = GTK_VALUE_INT (*arg);
198 src->channels = GTK_VALUE_INT (*arg);
201 src->frequency = GTK_VALUE_INT (*arg);
209 gst_audiosrc_get_arg (GtkObject *object, GtkArg *arg, guint id)
213 /* it's not null if we got it, but it might not be ours */
214 g_return_if_fail (GST_IS_AUDIOSRC (object));
216 src = GST_AUDIOSRC (object);
219 case ARG_BYTESPERREAD:
220 GTK_VALUE_INT (*arg) = src->bytes_per_read;
223 GTK_VALUE_INT (*arg) = src->format;
226 GTK_VALUE_INT (*arg) = src->channels;
229 GTK_VALUE_INT (*arg) = src->frequency;
232 arg->type = GTK_TYPE_INVALID;
237 static GstElementStateReturn
238 gst_audiosrc_change_state (GstElement *element)
240 g_return_val_if_fail (GST_IS_AUDIOSRC (element), FALSE);
242 /* if going down into NULL state, close the file if it's open */
243 if (GST_STATE_PENDING (element) == GST_STATE_NULL) {
244 if (GST_FLAG_IS_SET (element, GST_AUDIOSRC_OPEN))
245 gst_audiosrc_close_audio (GST_AUDIOSRC (element));
246 /* otherwise (READY or higher) we need to open the sound card */
248 if (!GST_FLAG_IS_SET (element, GST_AUDIOSRC_OPEN)) {
249 if (!gst_audiosrc_open_audio (GST_AUDIOSRC (element)))
250 return GST_STATE_FAILURE;
254 if (GST_ELEMENT_CLASS (parent_class)->change_state)
255 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
257 return GST_STATE_SUCCESS;
261 gst_audiosrc_open_audio (GstAudioSrc *src)
263 g_return_val_if_fail (!GST_FLAG_IS_SET (src, GST_AUDIOSRC_OPEN), FALSE);
265 /* first try to open the sound card */
266 src->fd = open("/dev/dsp", O_RDONLY);
268 /* if we have it, set the default parameters and go have fun */
270 int arg = 0x7fff0006;
272 if (ioctl (src->fd, SNDCTL_DSP_SETFRAGMENT, &arg)) perror("uh");
275 gst_audiosrc_sync_parms (src);
276 GST_DEBUG (0,"opened audio\n");
278 GST_FLAG_SET (src, GST_AUDIOSRC_OPEN);
286 gst_audiosrc_close_audio (GstAudioSrc *src)
288 g_return_if_fail (GST_FLAG_IS_SET (src, GST_AUDIOSRC_OPEN));
293 GST_FLAG_UNSET (src, GST_AUDIOSRC_OPEN);
297 gst_audiosrc_sync_parms (GstAudioSrc *audiosrc)
299 audio_buf_info ospace;
301 g_return_if_fail (audiosrc != NULL);
302 g_return_if_fail (GST_IS_AUDIOSRC (audiosrc));
303 g_return_if_fail (audiosrc->fd > 0);
305 ioctl(audiosrc->fd, SNDCTL_DSP_RESET, 0);
307 ioctl(audiosrc->fd, SNDCTL_DSP_SETFMT, &audiosrc->format);
308 ioctl(audiosrc->fd, SNDCTL_DSP_CHANNELS, &audiosrc->channels);
309 ioctl(audiosrc->fd, SNDCTL_DSP_SPEED, &audiosrc->frequency);
311 ioctl(audiosrc->fd, SNDCTL_DSP_GETOSPACE, &ospace);
313 g_print("setting sound card to %dKHz %d bit %s (%d bytes buffer)\n",
314 audiosrc->frequency,audiosrc->format,
315 (audiosrc->channels == 2) ? "stereo" : "mono",ospace.bytes);
317 // audiosrc->meta.format = audiosrc->format;
318 // audiosrc->meta.channels = audiosrc->channels;
319 // audiosrc->meta.frequency = audiosrc->frequency;
320 // audiosrc->sentmeta = FALSE;