1 /* GStreamer |
|
2 * |
|
3 * gstv4ltuner.c: tuner interface implementation for V4L |
|
4 * |
|
5 * Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net> |
|
6 * |
|
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. |
|
11 * |
|
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. |
|
16 * |
|
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. |
|
21 */ |
|
22 |
|
23 #ifdef HAVE_CONFIG_H |
|
24 #include "config.h" |
|
25 #endif |
|
26 |
|
27 #include <gst/gst.h> |
|
28 |
|
29 #include "gstv4ltuner.h" |
|
30 #include "gstv4lelement.h" |
|
31 #include "v4l_calls.h" |
|
32 |
|
33 static void gst_v4l_tuner_channel_class_init (GstV4lTunerChannelClass * klass); |
|
34 static void gst_v4l_tuner_channel_init (GstV4lTunerChannel * channel); |
|
35 |
|
36 static void gst_v4l_tuner_norm_class_init (GstV4lTunerNormClass * klass); |
|
37 static void gst_v4l_tuner_norm_init (GstV4lTunerNorm * norm); |
|
38 |
|
39 static const GList *gst_v4l_tuner_list_channels (GstTuner * tuner); |
|
40 static void gst_v4l_tuner_set_channel (GstTuner * tuner, |
|
41 GstTunerChannel * channel); |
|
42 static GstTunerChannel *gst_v4l_tuner_get_channel (GstTuner * tuner); |
|
43 |
|
44 static const GList *gst_v4l_tuner_list_norms (GstTuner * tuner); |
|
45 static void gst_v4l_tuner_set_norm (GstTuner * tuner, GstTunerNorm * norm); |
|
46 static GstTunerNorm *gst_v4l_tuner_get_norm (GstTuner * tuner); |
|
47 |
|
48 static void gst_v4l_tuner_set_frequency (GstTuner * tuner, |
|
49 GstTunerChannel * channel, gulong frequency); |
|
50 static gulong gst_v4l_tuner_get_frequency (GstTuner * tuner, |
|
51 GstTunerChannel * channel); |
|
52 static gint gst_v4l_tuner_signal_strength (GstTuner * tuner, |
|
53 GstTunerChannel * channel); |
|
54 |
|
55 static GstTunerNormClass *norm_parent_class = NULL; |
|
56 static GstTunerChannelClass *channel_parent_class = NULL; |
|
57 |
|
58 GType |
|
59 gst_v4l_tuner_channel_get_type (void) |
|
60 { |
|
61 static GType gst_v4l_tuner_channel_type = 0; |
|
62 |
|
63 if (!gst_v4l_tuner_channel_type) { |
|
64 static const GTypeInfo v4l_tuner_channel_info = { |
|
65 sizeof (GstV4lTunerChannelClass), |
|
66 NULL, |
|
67 NULL, |
|
68 (GClassInitFunc) gst_v4l_tuner_channel_class_init, |
|
69 NULL, |
|
70 NULL, |
|
71 sizeof (GstV4lTunerChannel), |
|
72 0, |
|
73 (GInstanceInitFunc) gst_v4l_tuner_channel_init, |
|
74 NULL |
|
75 }; |
|
76 |
|
77 gst_v4l_tuner_channel_type = |
|
78 g_type_register_static (GST_TYPE_TUNER_CHANNEL, |
|
79 "GstV4lTunerChannel", &v4l_tuner_channel_info, 0); |
|
80 } |
|
81 |
|
82 return gst_v4l_tuner_channel_type; |
|
83 } |
|
84 |
|
85 static void |
|
86 gst_v4l_tuner_channel_class_init (GstV4lTunerChannelClass * klass) |
|
87 { |
|
88 channel_parent_class = g_type_class_peek_parent (klass); |
|
89 } |
|
90 |
|
91 static void |
|
92 gst_v4l_tuner_channel_init (GstV4lTunerChannel * channel) |
|
93 { |
|
94 channel->index = 0; |
|
95 channel->audio = 0; |
|
96 channel->tuner = 0; |
|
97 } |
|
98 |
|
99 GType |
|
100 gst_v4l_tuner_norm_get_type (void) |
|
101 { |
|
102 static GType gst_v4l_tuner_norm_type = 0; |
|
103 |
|
104 if (!gst_v4l_tuner_norm_type) { |
|
105 static const GTypeInfo v4l_tuner_norm_info = { |
|
106 sizeof (GstV4lTunerNormClass), |
|
107 NULL, |
|
108 NULL, |
|
109 (GClassInitFunc) gst_v4l_tuner_norm_class_init, |
|
110 NULL, |
|
111 NULL, |
|
112 sizeof (GstV4lTunerNorm), |
|
113 0, |
|
114 (GInstanceInitFunc) gst_v4l_tuner_norm_init, |
|
115 NULL |
|
116 }; |
|
117 |
|
118 gst_v4l_tuner_norm_type = |
|
119 g_type_register_static (GST_TYPE_TUNER_NORM, |
|
120 "GstV4lTunerNorm", &v4l_tuner_norm_info, 0); |
|
121 } |
|
122 |
|
123 return gst_v4l_tuner_norm_type; |
|
124 } |
|
125 |
|
126 static void |
|
127 gst_v4l_tuner_norm_class_init (GstV4lTunerNormClass * klass) |
|
128 { |
|
129 norm_parent_class = g_type_class_peek_parent (klass); |
|
130 } |
|
131 |
|
132 static void |
|
133 gst_v4l_tuner_norm_init (GstV4lTunerNorm * norm) |
|
134 { |
|
135 norm->index = 0; |
|
136 } |
|
137 |
|
138 void |
|
139 gst_v4l_tuner_interface_init (GstTunerClass * klass) |
|
140 { |
|
141 /* default virtual functions */ |
|
142 klass->list_channels = gst_v4l_tuner_list_channels; |
|
143 klass->set_channel = gst_v4l_tuner_set_channel; |
|
144 klass->get_channel = gst_v4l_tuner_get_channel; |
|
145 |
|
146 klass->list_norms = gst_v4l_tuner_list_norms; |
|
147 klass->set_norm = gst_v4l_tuner_set_norm; |
|
148 klass->get_norm = gst_v4l_tuner_get_norm; |
|
149 |
|
150 klass->set_frequency = gst_v4l_tuner_set_frequency; |
|
151 klass->get_frequency = gst_v4l_tuner_get_frequency; |
|
152 klass->signal_strength = gst_v4l_tuner_signal_strength; |
|
153 } |
|
154 |
|
155 static G_GNUC_UNUSED gboolean |
|
156 gst_v4l_tuner_contains_channel (GstV4lElement * v4lelement, |
|
157 GstV4lTunerChannel * v4lchannel) |
|
158 { |
|
159 const GList *item; |
|
160 |
|
161 for (item = v4lelement->channels; item != NULL; item = item->next) |
|
162 if (item->data == v4lchannel) |
|
163 return TRUE; |
|
164 |
|
165 return FALSE; |
|
166 } |
|
167 |
|
168 static const GList * |
|
169 gst_v4l_tuner_list_channels (GstTuner * tuner) |
|
170 { |
|
171 return GST_V4LELEMENT (tuner)->channels; |
|
172 } |
|
173 |
|
174 static void |
|
175 gst_v4l_tuner_set_channel (GstTuner * tuner, GstTunerChannel * channel) |
|
176 { |
|
177 GstV4lElement *v4lelement = GST_V4LELEMENT (tuner); |
|
178 GstV4lTunerChannel *v4lchannel = GST_V4L_TUNER_CHANNEL (channel); |
|
179 gint norm; |
|
180 |
|
181 /* assert that we're opened and that we're using a known item */ |
|
182 g_return_if_fail (GST_V4L_IS_OPEN (v4lelement)); |
|
183 g_return_if_fail (gst_v4l_tuner_contains_channel (v4lelement, v4lchannel)); |
|
184 |
|
185 gst_v4l_get_chan_norm (v4lelement, NULL, &norm); |
|
186 gst_v4l_set_chan_norm (v4lelement, v4lchannel->index, norm); |
|
187 } |
|
188 |
|
189 static GstTunerChannel * |
|
190 gst_v4l_tuner_get_channel (GstTuner * tuner) |
|
191 { |
|
192 GstV4lElement *v4lelement = GST_V4LELEMENT (tuner); |
|
193 GList *item; |
|
194 gint channel; |
|
195 |
|
196 /* assert that we're opened */ |
|
197 g_return_val_if_fail (GST_V4L_IS_OPEN (v4lelement), NULL); |
|
198 |
|
199 gst_v4l_get_chan_norm (v4lelement, &channel, NULL); |
|
200 |
|
201 for (item = v4lelement->channels; item != NULL; item = item->next) { |
|
202 if (channel == GST_V4L_TUNER_CHANNEL (item->data)->index) |
|
203 return GST_TUNER_CHANNEL (item->data); |
|
204 } |
|
205 |
|
206 return NULL; |
|
207 } |
|
208 |
|
209 static G_GNUC_UNUSED gboolean |
|
210 gst_v4l_tuner_contains_norm (GstV4lElement * v4lelement, |
|
211 GstV4lTunerNorm * v4lnorm) |
|
212 { |
|
213 const GList *item; |
|
214 |
|
215 for (item = v4lelement->norms; item != NULL; item = item->next) |
|
216 if (item->data == v4lnorm) |
|
217 return TRUE; |
|
218 |
|
219 return FALSE; |
|
220 } |
|
221 |
|
222 static const GList * |
|
223 gst_v4l_tuner_list_norms (GstTuner * tuner) |
|
224 { |
|
225 return GST_V4LELEMENT (tuner)->norms; |
|
226 } |
|
227 |
|
228 static void |
|
229 gst_v4l_tuner_set_norm (GstTuner * tuner, GstTunerNorm * norm) |
|
230 { |
|
231 GstV4lElement *v4lelement = GST_V4LELEMENT (tuner); |
|
232 GstV4lTunerNorm *v4lnorm = GST_V4L_TUNER_NORM (norm); |
|
233 gint channel; |
|
234 |
|
235 /* assert that we're opened and that we're using a known item */ |
|
236 g_return_if_fail (GST_V4L_IS_OPEN (v4lelement)); |
|
237 g_return_if_fail (gst_v4l_tuner_contains_norm (v4lelement, v4lnorm)); |
|
238 |
|
239 gst_v4l_get_chan_norm (v4lelement, &channel, NULL); |
|
240 gst_v4l_set_chan_norm (v4lelement, channel, v4lnorm->index); |
|
241 } |
|
242 |
|
243 static GstTunerNorm * |
|
244 gst_v4l_tuner_get_norm (GstTuner * tuner) |
|
245 { |
|
246 GstV4lElement *v4lelement = GST_V4LELEMENT (tuner); |
|
247 GList *item; |
|
248 gint norm; |
|
249 |
|
250 /* assert that we're opened */ |
|
251 g_return_val_if_fail (GST_V4L_IS_OPEN (v4lelement), NULL); |
|
252 |
|
253 gst_v4l_get_chan_norm (v4lelement, NULL, &norm); |
|
254 |
|
255 for (item = v4lelement->norms; item != NULL; item = item->next) { |
|
256 if (norm == GST_V4L_TUNER_NORM (item->data)->index) |
|
257 return GST_TUNER_NORM (item->data); |
|
258 } |
|
259 |
|
260 return NULL; |
|
261 } |
|
262 |
|
263 static void |
|
264 gst_v4l_tuner_set_frequency (GstTuner * tuner, |
|
265 GstTunerChannel * channel, gulong frequency) |
|
266 { |
|
267 GstV4lElement *v4lelement = GST_V4LELEMENT (tuner); |
|
268 GstV4lTunerChannel *v4lchannel = GST_V4L_TUNER_CHANNEL (channel); |
|
269 gint chan; |
|
270 |
|
271 /* assert that we're opened and that we're using a known item */ |
|
272 g_return_if_fail (GST_V4L_IS_OPEN (v4lelement)); |
|
273 g_return_if_fail (GST_TUNER_CHANNEL_HAS_FLAG (channel, |
|
274 GST_TUNER_CHANNEL_FREQUENCY)); |
|
275 g_return_if_fail (gst_v4l_tuner_contains_channel (v4lelement, v4lchannel)); |
|
276 |
|
277 gst_v4l_get_chan_norm (v4lelement, &chan, NULL); |
|
278 if (chan == GST_V4L_TUNER_CHANNEL (channel)->index) { |
|
279 gst_v4l_set_frequency (v4lelement, v4lchannel->tuner, frequency); |
|
280 } |
|
281 } |
|
282 |
|
283 static gulong |
|
284 gst_v4l_tuner_get_frequency (GstTuner * tuner, GstTunerChannel * channel) |
|
285 { |
|
286 GstV4lElement *v4lelement = GST_V4LELEMENT (tuner); |
|
287 GstV4lTunerChannel *v4lchannel = GST_V4L_TUNER_CHANNEL (channel); |
|
288 gint chan; |
|
289 gulong frequency = 0; |
|
290 |
|
291 /* assert that we're opened and that we're using a known item */ |
|
292 g_return_val_if_fail (GST_V4L_IS_OPEN (v4lelement), 0); |
|
293 g_return_val_if_fail (GST_TUNER_CHANNEL_HAS_FLAG (channel, |
|
294 GST_TUNER_CHANNEL_FREQUENCY), 0); |
|
295 g_return_val_if_fail (gst_v4l_tuner_contains_channel (v4lelement, |
|
296 v4lchannel), 0); |
|
297 |
|
298 gst_v4l_get_chan_norm (v4lelement, &chan, NULL); |
|
299 if (chan == GST_V4L_TUNER_CHANNEL (channel)->index) { |
|
300 gst_v4l_get_frequency (v4lelement, v4lchannel->tuner, &frequency); |
|
301 } |
|
302 |
|
303 return frequency; |
|
304 } |
|
305 |
|
306 static gint |
|
307 gst_v4l_tuner_signal_strength (GstTuner * tuner, GstTunerChannel * channel) |
|
308 { |
|
309 GstV4lElement *v4lelement = GST_V4LELEMENT (tuner); |
|
310 GstV4lTunerChannel *v4lchannel = GST_V4L_TUNER_CHANNEL (channel); |
|
311 gint chan; |
|
312 guint signal = 0; |
|
313 |
|
314 /* assert that we're opened and that we're using a known item */ |
|
315 g_return_val_if_fail (GST_V4L_IS_OPEN (v4lelement), 0); |
|
316 g_return_val_if_fail (GST_TUNER_CHANNEL_HAS_FLAG (channel, |
|
317 GST_TUNER_CHANNEL_FREQUENCY), 0); |
|
318 g_return_val_if_fail (gst_v4l_tuner_contains_channel (v4lelement, |
|
319 v4lchannel), 0); |
|
320 |
|
321 gst_v4l_get_chan_norm (v4lelement, &chan, NULL); |
|
322 if (chan == GST_V4L_TUNER_CHANNEL (channel)->index && |
|
323 GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) { |
|
324 gst_v4l_get_signal (v4lelement, v4lchannel->tuner, &signal); |
|
325 } |
|
326 |
|
327 return (gint) signal; |
|
328 } |
|