sys/v4l2/gstv4l2tuner.c

   1 /* GStreamer
   2  *
   3  * Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
   4  *               2006 Edgard Lima <edgard.lima@indt.org.br>
   5  *
   6  * gstv4l2tuner.c: tuner interface implementation for V4L2
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Library General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Library General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Library General Public
  19  * License along with this library; if not, write to the
  20  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  21  * Boston, MA 02111-1307, USA.
  22  */
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include "config.h"
  26 #endif
  27
  28 #include <gst/gst.h>
  29
  30 #include "gstv4l2tuner.h"
  31 #include "gstv4l2object.h"
  32 #include "v4l2_calls.h"
  33 #include "v4l2src_calls.h"
  34
  35 static void gst_v4l2_tuner_channel_class_init (GstV4l2TunerChannelClass *
  36     klass);
  37 static void gst_v4l2_tuner_channel_init (GstV4l2TunerChannel * channel);
  38
  39 static void gst_v4l2_tuner_norm_class_init (GstV4l2TunerNormClass * klass);
  40 static void gst_v4l2_tuner_norm_init (GstV4l2TunerNorm * norm);
  41
  42 static GstTunerNormClass *norm_parent_class = NULL;
  43 static GstTunerChannelClass *channel_parent_class = NULL;
  44
  45 GType
  46 gst_v4l2_tuner_channel_get_type (void)
  47 {
  48   static GType gst_v4l2_tuner_channel_type = 0;
  49
  50   if (!gst_v4l2_tuner_channel_type) {
  51     static const GTypeInfo v4l2_tuner_channel_info = {
  52       sizeof (GstV4l2TunerChannelClass),
  53       NULL,
  54       NULL,
  55       (GClassInitFunc) gst_v4l2_tuner_channel_class_init,
  56       NULL,
  57       NULL,
  58       sizeof (GstV4l2TunerChannel),
  59       0,
  60       (GInstanceInitFunc) gst_v4l2_tuner_channel_init,
  61       NULL
  62     };
  63
  64     gst_v4l2_tuner_channel_type =
  65         g_type_register_static (GST_TYPE_TUNER_CHANNEL,
  66         "GstV4l2TunerChannel", &v4l2_tuner_channel_info, 0);
  67   }
  68
  69   return gst_v4l2_tuner_channel_type;
  70 }
  71
  72 static void
  73 gst_v4l2_tuner_channel_class_init (GstV4l2TunerChannelClass * klass)
  74 {
  75   channel_parent_class = g_type_class_peek_parent (klass);
  76 }
  77
  78 static void
  79 gst_v4l2_tuner_channel_init (GstV4l2TunerChannel * channel)
  80 {
  81   channel->index = (guint32) - 1;
  82   channel->tuner = (guint32) - 1;
  83   channel->audio = (guint32) - 1;
  84 }
  85
  86 GType
  87 gst_v4l2_tuner_norm_get_type (void)
  88 {
  89   static GType gst_v4l2_tuner_norm_type = 0;
  90
  91   if (!gst_v4l2_tuner_norm_type) {
  92     static const GTypeInfo v4l2_tuner_norm_info = {
  93       sizeof (GstV4l2TunerNormClass),
  94       NULL,
  95       NULL,
  96       (GClassInitFunc) gst_v4l2_tuner_norm_class_init,
  97       NULL,
  98       NULL,
  99       sizeof (GstV4l2TunerNorm),
 100       0,
 101       (GInstanceInitFunc) gst_v4l2_tuner_norm_init,
 102       NULL
 103     };
 104
 105     gst_v4l2_tuner_norm_type =
 106         g_type_register_static (GST_TYPE_TUNER_NORM,
 107         "GstV4l2TunerNorm", &v4l2_tuner_norm_info, 0);
 108   }
 109
 110   return gst_v4l2_tuner_norm_type;
 111 }
 112
 113 static void
 114 gst_v4l2_tuner_norm_class_init (GstV4l2TunerNormClass * klass)
 115 {
 116   norm_parent_class = g_type_class_peek_parent (klass);
 117 }
 118
 119 static void
 120 gst_v4l2_tuner_norm_init (GstV4l2TunerNorm * norm)
 121 {
 122   norm->index = 0;
 123 }
 124
 125 static G_GNUC_UNUSED gboolean
 126 gst_v4l2_tuner_contains_channel (GstV4l2Object * v4l2object,
 127     GstV4l2TunerChannel * v4l2channel)
 128 {
 129   const GList *item;
 130
 131   for (item = v4l2object->channels; item != NULL; item = item->next)
 132     if (item->data == v4l2channel)
 133       return TRUE;
 134
 135   return FALSE;
 136 }
 137
 138 const GList *
 139 gst_v4l2_tuner_list_channels (GstV4l2Object * v4l2object)
 140 {
 141   return v4l2object->channels;
 142 }
 143
 144 gboolean
 145 gst_v4l2_tuner_set_channel (GstV4l2Object * v4l2object,
 146     GstTunerChannel * channel)
 147 {
 148   GstV4l2TunerChannel *v4l2channel = GST_V4L2_TUNER_CHANNEL (channel);
 149
 150   /* assert that we're opened and that we're using a known item */
 151   g_return_val_if_fail (GST_V4L2_IS_OPEN (v4l2object), FALSE);
 152   g_return_val_if_fail (gst_v4l2_tuner_contains_channel (v4l2object,
 153           v4l2channel), FALSE);
 154
 155   if (v4l2object->set_in_out_func (v4l2object, v4l2channel->index)) {
 156     gst_tuner_channel_changed (GST_TUNER (v4l2object->element), channel);
 157     /* can FPS change here? */
 158     return TRUE;
 159   }
 160
 161   return FALSE;
 162
 163 }
 164
 165 GstTunerChannel *
 166 gst_v4l2_tuner_get_channel (GstV4l2Object * v4l2object)
 167 {
 168   GList *item;
 169   gint channel;
 170
 171   /* assert that we're opened and that we're using a known item */
 172   g_return_val_if_fail (GST_V4L2_IS_OPEN (v4l2object), NULL);
 173
 174   if (v4l2object->get_in_out_func (v4l2object, &channel)) {
 175
 176     for (item = v4l2object->channels; item != NULL; item = item->next) {
 177       if (channel == GST_V4L2_TUNER_CHANNEL (item->data)->index)
 178         return (GstTunerChannel *) item->data;
 179     }
 180
 181   }
 182
 183   return NULL;
 184 }
 185
 186 static G_GNUC_UNUSED gboolean
 187 gst_v4l2_tuner_contains_norm (GstV4l2Object * v4l2object,
 188     GstV4l2TunerNorm * v4l2norm)
 189 {
 190   const GList *item;
 191
 192   for (item = v4l2object->norms; item != NULL; item = item->next)
 193     if (item->data == v4l2norm)
 194       return TRUE;
 195
 196   return FALSE;
 197 }
 198
 199 const GList *
 200 gst_v4l2_tuner_list_norms (GstV4l2Object * v4l2object)
 201 {
 202   return v4l2object->norms;
 203 }
 204
 205 void
 206 gst_v4l2_tuner_set_norm_and_notify (GstV4l2Object * v4l2object,
 207     GstTunerNorm * norm)
 208 {
 209   if (gst_v4l2_tuner_set_norm (v4l2object, norm)) {
 210 #if 0
 211     g_object_notify (G_OBJECT (v4l2object->element), "norm");
 212 #endif
 213   }
 214 }
 215
 216 gboolean
 217 gst_v4l2_tuner_set_norm (GstV4l2Object * v4l2object, GstTunerNorm * norm)
 218 {
 219   GstV4l2TunerNorm *v4l2norm = GST_V4L2_TUNER_NORM (norm);
 220
 221   /* assert that we're opened and that we're using a known item */
 222   g_return_val_if_fail (GST_V4L2_IS_OPEN (v4l2object), FALSE);
 223   g_return_val_if_fail (gst_v4l2_tuner_contains_norm (v4l2object, v4l2norm),
 224       FALSE);
 225
 226   if (gst_v4l2_set_norm (v4l2object, v4l2norm->index)) {
 227     gst_tuner_norm_changed (GST_TUNER (v4l2object->element), norm);
 228     if (v4l2object->update_fps_func)
 229       v4l2object->update_fps_func (v4l2object);
 230     return TRUE;
 231   }
 232
 233   return FALSE;
 234
 235 }
 236
 237 GstTunerNorm *
 238 gst_v4l2_tuner_get_norm (GstV4l2Object * v4l2object)
 239 {
 240   GList *item;
 241   v4l2_std_id norm;
 242
 243   /* assert that we're opened and that we're using a known item */
 244   g_return_val_if_fail (GST_V4L2_IS_OPEN (v4l2object), NULL);
 245
 246   gst_v4l2_get_norm (v4l2object, &norm);
 247
 248   for (item = v4l2object->norms; item != NULL; item = item->next) {
 249     if (norm & GST_V4L2_TUNER_NORM (item->data)->index)
 250       return (GstTunerNorm *) item->data;
 251   }
 252
 253   return NULL;
 254 }
 255
 256 void
 257 gst_v4l2_tuner_set_frequency_and_notify (GstV4l2Object * v4l2object,
 258     GstTunerChannel * channel, gulong frequency)
 259 {
 260   if (gst_v4l2_tuner_set_frequency (v4l2object, channel, frequency)) {
 261 #if 0
 262     g_object_notify (G_OBJECT (v4l2object->element), "frequency");
 263 #endif
 264   }
 265 }
 266
 267 gboolean
 268 gst_v4l2_tuner_set_frequency (GstV4l2Object * v4l2object,
 269     GstTunerChannel * channel, gulong frequency)
 270 {
 271   GstV4l2TunerChannel *v4l2channel = GST_V4L2_TUNER_CHANNEL (channel);
 272   gint chan;
 273
 274   /* assert that we're opened and that we're using a known item */
 275   g_return_val_if_fail (GST_V4L2_IS_OPEN (v4l2object), FALSE);
 276   g_return_val_if_fail (GST_TUNER_CHANNEL_HAS_FLAG (channel,
 277           GST_TUNER_CHANNEL_FREQUENCY), FALSE);
 278   g_return_val_if_fail (gst_v4l2_tuner_contains_channel (v4l2object,
 279           v4l2channel), FALSE);
 280
 281   if (v4l2object->get_in_out_func (v4l2object, &chan)) {
 282     if (chan == GST_V4L2_TUNER_CHANNEL (channel)->index &&
 283         GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {
 284       if (gst_v4l2_set_frequency (v4l2object, v4l2channel->tuner, frequency)) {
 285         gst_tuner_frequency_changed (GST_TUNER (v4l2object->element), channel,
 286             frequency);
 287         return TRUE;
 288       }
 289     }
 290   }
 291
 292   return FALSE;
 293 }
 294
 295 gulong
 296 gst_v4l2_tuner_get_frequency (GstV4l2Object * v4l2object,
 297     GstTunerChannel * channel)
 298 {
 299   GstV4l2TunerChannel *v4l2channel = GST_V4L2_TUNER_CHANNEL (channel);
 300   gint chan;
 301   gulong frequency = 0;
 302
 303   /* assert that we're opened and that we're using a known item */
 304   g_return_val_if_fail (GST_V4L2_IS_OPEN (v4l2object), 0);
 305   g_return_val_if_fail (GST_TUNER_CHANNEL_HAS_FLAG (channel,
 306           GST_TUNER_CHANNEL_FREQUENCY), 0);
 307   g_return_val_if_fail (gst_v4l2_tuner_contains_channel (v4l2object,
 308           v4l2channel), 0);
 309
 310   if (v4l2object->get_in_out_func (v4l2object, &chan)) {
 311     if (chan == GST_V4L2_TUNER_CHANNEL (channel)->index &&
 312         GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {
 313       gst_v4l2_get_frequency (v4l2object, v4l2channel->tuner, &frequency);
 314     }
 315   }
 316
 317   return frequency;
 318 }
 319
 320 gint
 321 gst_v4l2_tuner_signal_strength (GstV4l2Object * v4l2object,
 322     GstTunerChannel * channel)
 323 {
 324   GstV4l2TunerChannel *v4l2channel = GST_V4L2_TUNER_CHANNEL (channel);
 325   gint chan;
 326   gulong signal = 0;
 327
 328   /* assert that we're opened and that we're using a known item */
 329   g_return_val_if_fail (GST_V4L2_IS_OPEN (v4l2object), 0);
 330   g_return_val_if_fail (GST_TUNER_CHANNEL_HAS_FLAG (channel,
 331           GST_TUNER_CHANNEL_FREQUENCY), 0);
 332   g_return_val_if_fail (gst_v4l2_tuner_contains_channel (v4l2object,
 333           v4l2channel), 0);
 334
 335   if (v4l2object->get_in_out_func (v4l2object, &chan)) {
 336     if (chan == GST_V4L2_TUNER_CHANNEL (channel)->index &&
 337         GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {
 338       gst_v4l2_signal_strength (v4l2object, v4l2channel->tuner, &signal);
 339     }
 340   }
 341
 342   return signal;
 343 }