summaryrefslogtreecommitdiff
path: root/radio.c
blob: 80706713b6ccc9d344f0ece427de5f989c0fb14d (plain)
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
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
/*
 * GPL 2
 */

#include <stdio.h>
#include <string.h>

#include <sys/types.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <fcntl.h>

#include <alsa/asoundlib.h>
#include <linux/videodev2.h>
#include <dbus/dbus-glib.h>
#include <pulse/glib-mainloop.h>
#include <pulse/error.h>
#include <pulse/context.h>
#include <pulse/stream.h>
#include <pulse/xmalloc.h>

#include "radio.h"
#include "radio_routing.h"
#include "types.h"
#include "n900-fmrx-enabler.h"
#include "rds.h"

G_DEFINE_TYPE(CFmRadio, cfm_radio, G_TYPE_OBJECT);

#define CFM_RADIO_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), CFM_TYPE_RADIO, CFmRadioPrivate))

#define ABS_RANGE_LOW 60000000
#define ABS_RANGE_HIGH 140000000
#define MIN_BUFFER_SIZE (4096*4)

#define FMRX_SERVICE_NAME "de.pycage.FMRXEnabler"
#define FMRX_OBJECT_PATH  "/de/pycage/FMRXEnabler"
#define FMRX_INTERFACE    "de.pycage.FMRXEnabler"
#define FMRX_KEEPALIVE_INTERVAL 20

#define SYSFS_NODE_PATH	"/sys/class/i2c-adapter/i2c-3/3-0022"

#define MIXER_NAME			"hw:0"

static void cfm_radio_turn_on(CFmRadio *self);
static void cfm_radio_turn_off(CFmRadio *self);

struct _CFmRadioPrivate {
	int fd;

	CFmRadioOutput output;

	gboolean precise_tuner;
	gulong range_low, range_high;

	DBusGProxy *enabler;
	guint enabler_timer;

	pa_glib_mainloop *pa_loop;
	pa_context *pa_ctx;
	pa_stream *so, *si;

	snd_hctl_t *mixer;
};

enum {
	PROP_0,
	PROP_OUTPUT,
	PROP_FREQUENCY,
	PROP_RANGE_LOW,
	PROP_RANGE_HIGH,
	PROP_SIGNAL,
	PROP_RDS_PI,
	PROP_RDS_PS,
	PROP_RDS_RT,
	PROP_LAST
};

static GParamSpec *properties[PROP_LAST];

static void cfm_radio_tuner_power(CFmRadio *self, gboolean enable)
{
	CFmRadioPrivate *priv = self->priv;
	struct v4l2_control vctrl;
	int res;

	if (priv->fd == -1) return;

	vctrl.id = V4L2_CID_AUDIO_MUTE;
	vctrl.value = enable ? 0 : 1;
	res = ioctl(priv->fd, VIDIOC_S_CTRL, &vctrl);

	if (res < 0) {
		perror("VIDIOC_S_CTRL");
	}
}

static void cfm_radio_tuner_hw_seek(CFmRadio *self, gboolean upward)
{
	CFmRadioPrivate *priv = self->priv;
	struct v4l2_hw_freq_seek t_freq_seek = { 0 };
	g_return_if_fail(priv->fd != -1);
	t_freq_seek.tuner = 0;
	t_freq_seek.type = V4L2_TUNER_RADIO;
	t_freq_seek.seek_upward = upward;
	int res = ioctl(priv->fd, VIDIOC_S_HW_FREQ_SEEK, &t_freq_seek);
	g_warn_if_fail(res == 0);
}

static void cfm_radio_mixer_set_enum_value(CFmRadio *self, const char * name, const char * value)
{
	CFmRadioPrivate *priv = self->priv;
	int err;

	snd_ctl_elem_id_t *id;
	snd_ctl_elem_id_alloca(&id);
	snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER);
	snd_ctl_elem_id_set_name(id, name);

	snd_hctl_elem_t *elem = snd_hctl_find_elem(priv->mixer, id);
	g_return_if_fail(elem != NULL);

	snd_ctl_elem_info_t *info;
	snd_ctl_elem_info_alloca(&info);
	snd_ctl_elem_info_set_id(info, id);
	err = snd_hctl_elem_info(elem, info);
	g_return_if_fail(err == 0);	

	long value_idx = -1;
	int i, items = snd_ctl_elem_info_get_items(info);
	for (i = 0; i < items; i++) {
		snd_ctl_elem_info_set_item(info, i);
		err = snd_hctl_elem_info(elem, info);
		g_return_if_fail(err == 0);
		if (strcmp(snd_ctl_elem_info_get_item_name(info), value) == 0) {
			value_idx = i;
			break;
		}
	}
	g_return_if_fail(value_idx >= 0);

	snd_ctl_elem_value_t *control;
	snd_ctl_elem_value_alloca(&control);
	snd_ctl_elem_value_set_id(control, id);

	items = snd_ctl_elem_info_get_count(info);
	for (i = 0; i < items; i++) {
		snd_ctl_elem_value_set_enumerated(control, i, value_idx);
	}

	err = snd_hctl_elem_write(elem, control);
	g_return_if_fail(err == 0);
}

static void cfm_radio_mixer_set_bool_value(CFmRadio *self, const char * name, gboolean value)
{
	CFmRadioPrivate *priv = self->priv;
	int err;

	snd_ctl_elem_id_t *id;
	snd_ctl_elem_id_alloca(&id);
	snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER);
	snd_ctl_elem_id_set_name(id, name);

	snd_hctl_elem_t *elem = snd_hctl_find_elem(priv->mixer, id);
	g_return_if_fail(elem != NULL);

	snd_ctl_elem_info_t *info;
	snd_ctl_elem_info_alloca(&info);
	snd_ctl_elem_info_set_id(info, id);
	err = snd_hctl_elem_info(elem, info);
	g_return_if_fail(err == 0);	

	snd_ctl_elem_value_t *control;
	snd_ctl_elem_value_alloca(&control);
	snd_ctl_elem_value_set_id(control, id);

	int i, items = snd_ctl_elem_info_get_count(info);
	for (i = 0; i < items; i++) {
		snd_ctl_elem_value_set_boolean(control, i, value);
	}

	err = snd_hctl_elem_write(elem, control);
	g_return_if_fail(err == 0);
}

static void cfm_radio_mixer_enable(CFmRadio *self, gboolean enable)
{
	if (enable) {
		cfm_radio_mixer_set_enum_value(self, "Input Select", "ADC");
		cfm_radio_mixer_set_bool_value(self, "PGA Capture Switch", TRUE);
		cfm_radio_mixer_set_bool_value(self, "Left PGA Mixer Line2L Switch", TRUE);
		cfm_radio_mixer_set_bool_value(self, "Right PGA Mixer Line2R Switch", TRUE);
	} else {
		cfm_radio_mixer_set_enum_value(self, "Input Select", "Digital Mic");
		cfm_radio_mixer_set_bool_value(self, "PGA Capture Switch", FALSE);
		cfm_radio_mixer_set_bool_value(self, "Left PGA Mixer Line2L Switch", FALSE);
		cfm_radio_mixer_set_bool_value(self, "Right PGA Mixer Line2R Switch", FALSE);
	}
}

static void cfm_radio_init_tuner(CFmRadio *self, const gchar * device)
{
	CFmRadioPrivate *priv = self->priv;
	struct v4l2_tuner tuner = { 0 };
	int res;

	priv->fd = open(device, O_RDONLY);
	if (priv->fd == -1) {
		perror("Open radio tuner");
	}

	tuner.index = 0;
	res = ioctl(priv->fd, VIDIOC_G_TUNER, &tuner);
	if (res < 0) {
		perror("VIDIOC_G_TUNER");
		return;
	}

	if (tuner.type != V4L2_TUNER_RADIO) {
		g_warning("Not a radio tuner\n");
		return;
	}

	priv->precise_tuner = (tuner.capability & V4L2_TUNER_CAP_LOW) ?
	                        TRUE : FALSE;

	if (priv->precise_tuner) {
		priv->range_low = tuner.rangelow * 62.5;
		priv->range_high = tuner.rangehigh * 62.5;
	} else {
		priv->range_low = tuner.rangelow * 62500;
		priv->range_high = tuner.rangehigh * 62500;
	}

	g_debug("Tuner detected (from %lu to %lu)\n", priv->range_low, priv->range_high);

	cfm_radio_tuner_power(self, TRUE);

	g_debug("Tuner powered!\n");

	g_object_notify(G_OBJECT(self), "range-low");
	g_object_notify(G_OBJECT(self), "range-high");
	g_object_notify(G_OBJECT(self), "frequency");
}

static void cfm_radio_fmrx_request_cb(DBusGProxy *proxy, gint result, char * device, GError *error, gpointer userdata)
{
	CFmRadio *self = CFM_RADIO(userdata);
	CFmRadioPrivate *priv = self->priv;

	if (error) {
		g_warning("D-Bus error while contacting fmrx enabler: %s\n",
			error->message);
		g_error_free(error);
	} else if (result != 0) {
		g_warning("Ungranted acess to fmrx device (%d)\n", result);
	} else if (priv->fd != -1) {
		g_debug("Renewed access to device\n");
	} else {
		g_debug("Granted access to device: %s\n", device);
		cfm_radio_init_tuner(self, device);
		/* TODO: Possibly initialize more stuff. */
	}
	
	if (device) {
		g_free(device);
	}
}

static void cfm_radio_fmrx_request(CFmRadio *self)
{
	CFmRadioPrivate *priv = self->priv;
	g_return_if_fail(priv->enabler);

	de_pycage_FMRXEnabler_request_async(priv->enabler,
		cfm_radio_fmrx_request_cb, self);
}

static gboolean cfm_radio_fmrx_keepalive(gpointer data)
{
	CFmRadio *self = CFM_RADIO(data);
	CFmRadioPrivate *priv = self->priv;

	if (!priv->enabler) {
		priv->enabler_timer = 0;
		return FALSE;
	}

	cfm_radio_fmrx_request(self);

	return TRUE;
}

static void cfm_radio_ctx_state_change(pa_context *c, void *userdata)
{
	CFmRadio *self = CFM_RADIO(userdata);
	CFmRadioPrivate *priv = self->priv;
	switch (pa_context_get_state(c)) {
	case PA_CONTEXT_READY:
		if (priv->output != CFM_RADIO_OUTPUT_MUTE && (!priv->so || !priv->si)) {
			cfm_radio_turn_on(self);
		}
	break;
	case PA_CONTEXT_FAILED:
		cfm_radio_turn_off(self);
		g_warning("Pulseaudio connection failed\n");
	break;
	default:
	break;
	}
}

static void cfm_radio_si_request(pa_stream *p, size_t nbytes, void *userdata)
{
	CFmRadio *self = CFM_RADIO(userdata);
	CFmRadioPrivate *priv = self->priv;

	g_return_if_fail(priv->si || priv->so);

	if (nbytes < MIN_BUFFER_SIZE) 
		return;

	void * in;
	size_t in_nbytes;
	int res = pa_stream_peek(priv->si, (const void **) &in, &in_nbytes);
	if (res != 0) {
		g_warning("Failed to read from input stream: %s\n", pa_strerror(res));
		return;
	}
	g_warn_if_fail(in);

	res = pa_stream_write(priv->so, in, in_nbytes, NULL, 0, PA_SEEK_RELATIVE);
	if (res != 0) {
		g_warning("Failed to write to output stream: %s\n", pa_strerror(res));
		return;
	}
	
	pa_stream_drop(priv->si);
}

static void cfm_radio_turn_on(CFmRadio *self)
{
	CFmRadioPrivate *priv = self->priv;
	/* A good default for the N900. */
	pa_sample_spec spec = {
		.format = PA_SAMPLE_S16LE,
		.rate = 48000,
		.channels = 2
	};
	int res;
	g_warn_if_fail(priv->pa_ctx);

	priv->si = pa_stream_new(priv->pa_ctx, "FMRadio input", &spec, NULL);
	priv->so = pa_stream_new(priv->pa_ctx, "FMRadio output", &spec, NULL);

	pa_stream_set_read_callback(priv->si, cfm_radio_si_request, self);

	res = pa_stream_connect_playback(priv->so, NULL, NULL, 0, NULL, NULL);
	if (res != 0) {
		g_warning("Failed to connect output stream: %s\n", pa_strerror(res));
	}
	res = pa_stream_connect_record(priv->si, NULL, NULL, 0);
	if (res != 0) {
		g_warning("Failed to connect input stream: %s\n", pa_strerror(res));
	}

	cfm_radio_mixer_enable(self, TRUE);

	g_debug("Turned on\n");
}

static void cfm_radio_turn_off(CFmRadio *self)
{
	CFmRadioPrivate *priv = self->priv;
	if (priv->so) {
		pa_stream_disconnect(priv->so);
		pa_stream_unref(priv->so);
		priv->so = NULL;
	}
	if (priv->si) {
		pa_stream_disconnect(priv->si);
		pa_stream_unref(priv->si);
		priv->si = NULL;
	}
	cfm_radio_mixer_enable(self, FALSE);
	g_debug("Turned off\n");
}

static void cfm_radio_init(CFmRadio *self)
{
	CFmRadioPrivate *priv;
	GError *error = NULL;
	int res;

	self->priv = priv = CFM_RADIO_GET_PRIVATE(self);
	priv->fd = -1;

	DBusGConnection *conn = dbus_g_bus_get(DBUS_BUS_SYSTEM, &error);
	if (!conn) {
		g_warning("Failed to get system bus: %s\n", error->message);
		g_error_free(error);
	}

	priv->enabler = dbus_g_proxy_new_for_name_owner(conn, FMRX_SERVICE_NAME,
		FMRX_OBJECT_PATH, FMRX_INTERFACE, &error);
	if (!priv->enabler) {
		g_warning("Failed to connect to fmrx enabler service: %s\n",
			error->message);
		g_error_free(error);
	}

	cfm_radio_fmrx_request(self);

	priv->pa_loop = pa_glib_mainloop_new(NULL);
	priv->pa_ctx = pa_context_new(pa_glib_mainloop_get_api(priv->pa_loop),
		"FMRadio"); /* Note that the name is very important on Maemo. */
	pa_context_set_state_callback(priv->pa_ctx, cfm_radio_ctx_state_change, self);
	res = pa_context_connect(priv->pa_ctx, NULL, 0, NULL);
	g_warn_if_fail(res == 0);

	priv->enabler_timer = g_timeout_add_seconds(FMRX_KEEPALIVE_INTERVAL,
		cfm_radio_fmrx_keepalive, self);

	res = snd_hctl_open(&priv->mixer, MIXER_NAME, 0);
	if (res < 0) {
		g_warning("Failed to open ALSA mixer res=%d\n", res);
	}
	res = snd_hctl_load(priv->mixer);
	if (res < 0) {
		g_warning("Failed to load ALSA hmixer elements res=%d\n", res);
	}
}

static void cfm_radio_set_output(CFmRadio *self, CFmRadioOutput mode)
{
	CFmRadioPrivate *priv = self->priv;
	//CFmRadioOutput old_output = priv->output;
	priv->output = mode;
	if (mode == CFM_RADIO_OUTPUT_MUTE) {
		cfm_radio_turn_off(self);
	} else if (pa_context_get_state(priv->pa_ctx) == PA_CONTEXT_READY) {
		cfm_radio_turn_on(self);
	}
}

static CFmRadioOutput cfm_radio_get_output(CFmRadio *self)
{
	CFmRadioPrivate *priv = self->priv;
	return priv->output;
}

static void cfm_radio_set_frequency(CFmRadio *self, gulong freq)
{
	CFmRadioPrivate *priv = self->priv;
	struct v4l2_frequency t_freq = { 0 };
	g_return_if_fail(priv->fd != -1);
	t_freq.tuner = 0;
	t_freq.type = V4L2_TUNER_RADIO;
	t_freq.frequency = priv->precise_tuner ? freq / 62.5 : freq / 62500;
	int res = ioctl(priv->fd, VIDIOC_S_FREQUENCY, &t_freq);
	g_warn_if_fail(res == 0);
}

static gulong cfm_radio_get_frequency(CFmRadio *self)
{
	CFmRadioPrivate *priv = self->priv;
	struct v4l2_frequency t_freq = { 0 };
	g_return_val_if_fail(priv->fd != -1, 0);
	t_freq.tuner = 0;
	int res = ioctl(priv->fd, VIDIOC_G_FREQUENCY, &t_freq);
	g_return_val_if_fail(res == 0, 0);
	return priv->precise_tuner ? t_freq.frequency * 62.5 : t_freq.frequency * 62500;
}

static guint cfm_radio_get_signal(CFmRadio *self)
{
	CFmRadioPrivate *priv = self->priv;
	struct v4l2_tuner tuner = { 0 };
	g_return_val_if_fail(priv->fd != -1, 0);
	tuner.index = 0;
	int res = ioctl(priv->fd, VIDIOC_G_TUNER, &tuner);
	g_return_val_if_fail(res == 0, 0);
	return tuner.signal;
}

static gchar* cfm_radio_get_sysfs_key(CFmRadio *self, const gchar *key)
{
	GError *error = NULL;
	gchar *file = g_strdup_printf("%s/%s", SYSFS_NODE_PATH, key);
	gchar *r = NULL;

	if (!g_file_get_contents(file, &r, NULL, &error)) {
		g_warning("Unable to read sysfs key %s: %s\n", key, error->message);
	}

	g_free(file);

	return r;
}

static gchar* cfm_radio_get_rds(CFmRadio *self, const gchar *key)
{
	gchar *v = cfm_radio_get_sysfs_key(self, key);
	if (v) {
		gchar * r = rds_decode(v);
		g_free(v);
		return r;
	} else {
		return NULL;
	}
}

static void cfm_radio_set_property(GObject *object, guint property_id,
	const GValue *value, GParamSpec *pspec)
{
	CFmRadio *self = CFM_RADIO(object);
	switch (property_id) {
	case PROP_OUTPUT:
		cfm_radio_set_output(self, g_value_get_enum(value));
		break;
	case PROP_FREQUENCY:
		cfm_radio_set_frequency(self, g_value_get_ulong(value));
		break;
	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID(object, property_id, pspec);
		break;
	}
}

static void cfm_radio_get_property(GObject *object, guint property_id,
	GValue *value, GParamSpec *pspec)
{
	CFmRadio *self = CFM_RADIO(object);
	switch (property_id) {
	case PROP_OUTPUT:
		g_value_set_enum(value, cfm_radio_get_output(self));
		break;
	case PROP_FREQUENCY:
		g_value_set_ulong(value, cfm_radio_get_frequency(self));
		break;
	case PROP_RANGE_LOW:
		g_value_set_ulong(value, self->priv->range_low);
		break;
	case PROP_RANGE_HIGH:
		g_value_set_ulong(value, self->priv->range_high);
		break;
	case PROP_SIGNAL:
		g_value_set_uint(value, cfm_radio_get_signal(self));
		break;
	case PROP_RDS_PI:
		g_value_take_string(value, cfm_radio_get_rds(self, "rds_pi"));
		break;
	case PROP_RDS_PS:
		g_value_take_string(value, cfm_radio_get_rds(self, "rds_ps"));
		break;
	case PROP_RDS_RT:
		g_value_take_string(value, cfm_radio_get_rds(self, "rds_rt"));
		break;
	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID(object, property_id, pspec);
		break;
	}
}

static void cfm_radio_dispose(GObject *object)
{
	CFmRadio *self = CFM_RADIO(object);
	CFmRadioPrivate *priv = self->priv;
	if (priv->enabler_timer) {
		g_source_remove(priv->enabler_timer);
		priv->enabler_timer = 0;
	}
	cfm_radio_tuner_power(self, FALSE);
	cfm_radio_turn_off(self);
	if (priv->enabler) {
		g_object_unref(priv->enabler);
		priv->enabler = NULL;
	}
	if (priv->pa_ctx) {
		pa_context_disconnect(priv->pa_ctx);
		pa_context_unref(priv->pa_ctx);
		priv->pa_ctx = NULL;
	}
	if (priv->pa_loop) {
		pa_glib_mainloop_free(priv->pa_loop);
		priv->pa_loop = NULL;
	}
}

static void cfm_radio_finalize(GObject *object)
{
	CFmRadio *self = CFM_RADIO(object);
	CFmRadioPrivate *priv = self->priv;
	if (priv->mixer) {
		snd_hctl_close(priv->mixer);
		priv->mixer = NULL;
	}
	if (priv->fd != -1) {
		close(priv->fd);
		priv->fd = -1;
	}
}

static void cfm_radio_class_init(CFmRadioClass *klass)
{
	GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
	GParamSpec *param_spec;

	gobject_class->set_property = cfm_radio_set_property;
	gobject_class->get_property = cfm_radio_get_property;
	gobject_class->dispose = cfm_radio_dispose;
	gobject_class->finalize = cfm_radio_finalize;

	g_type_class_add_private (klass, sizeof(CFmRadioPrivate));

	param_spec = g_param_spec_enum("output", "Output device",
	                               "Audio output device",
                                    CFM_TYPE_RADIO_OUTPUT,
									CFM_RADIO_OUTPUT_MUTE,
	                                G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
	properties[PROP_OUTPUT] = param_spec;
	g_object_class_install_property(gobject_class, PROP_OUTPUT, param_spec);

	param_spec = g_param_spec_ulong("frequency",
	                                "Frequency to tune (Hz)",
	                                "This is the frequency to tune, in Hz",
	                                ABS_RANGE_LOW, ABS_RANGE_HIGH, ABS_RANGE_LOW,
	                                G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
	properties[PROP_FREQUENCY] = param_spec;
	g_object_class_install_property(gobject_class, PROP_FREQUENCY, param_spec);

	param_spec = g_param_spec_ulong("range-low",
	                                "Min frequency range (Hz)",
	                                "This is the lowest frequency that can be tuned, in Hz",
	                                ABS_RANGE_LOW, ABS_RANGE_HIGH, ABS_RANGE_LOW,
	                                G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);

	g_object_class_install_property(gobject_class, PROP_RANGE_LOW, param_spec);
	properties[PROP_RANGE_LOW] = param_spec;
	param_spec = g_param_spec_ulong("range-high",
	                                "Max frequency range (Hz)",
	                                "This is the highest frequency that can be tuned, in Hz",
	                                ABS_RANGE_LOW, ABS_RANGE_HIGH, ABS_RANGE_HIGH,
	                                G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
	properties[PROP_RANGE_HIGH] = param_spec;
	g_object_class_install_property(gobject_class, PROP_RANGE_HIGH, param_spec);
	param_spec = g_param_spec_uint("signal",
	                               "Signal strength",
	                               "The signal strength if known, ranging from 0 (worse) to 65536 (best)",
	                                0, 65536, 0,
	                                G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
	properties[PROP_SIGNAL] = param_spec;
	g_object_class_install_property(gobject_class, PROP_SIGNAL, param_spec);
	param_spec = g_param_spec_string("rds-pi",
	                                 "RDS Program Identification",
	                                 "Current station's code",
	                                 "",
	                                 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
	properties[PROP_RDS_PI] = param_spec;
	g_object_class_install_property(gobject_class, PROP_RDS_PI, param_spec);
	param_spec = g_param_spec_string("rds-ps",
	                                 "RDS Program Server",
	                                 "Current station's name",
	                                 "",
	                                 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
	properties[PROP_RDS_PS] = param_spec;
	g_object_class_install_property(gobject_class, PROP_RDS_PS, param_spec);
	param_spec = g_param_spec_string("rds-rt",
	                                 "RDS Radio Text",
	                                 "Current station's radio text",
	                                 "",
	                                 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
	properties[PROP_RDS_RT] = param_spec;
	g_object_class_install_property(gobject_class, PROP_RDS_RT, param_spec);
}

CFmRadio* cfm_radio_new()
{
	return g_object_new(CFM_TYPE_RADIO, NULL);
}

void cfm_radio_seek_up(CFmRadio* radio)
{
	cfm_radio_tuner_hw_seek(radio, TRUE);
}

void cfm_radio_seek_down(CFmRadio* radio)
{
	cfm_radio_tuner_hw_seek(radio, FALSE);
}