--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gst_plugins_base/sys/v4l/gstv4ltuner.c	Wed Sep 01 12:16:41 2010 +0100
@@ -0,0 +1,328 @@
+/* GStreamer
+ *
+ * gstv4ltuner.c: tuner interface implementation for V4L
+ *
+ * Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
+ *
+ * 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 <gst/gst.h>
+
+#include "gstv4ltuner.h"
+#include "gstv4lelement.h"
+#include "v4l_calls.h"
+
+static void gst_v4l_tuner_channel_class_init (GstV4lTunerChannelClass * klass);
+static void gst_v4l_tuner_channel_init (GstV4lTunerChannel * channel);
+
+static void gst_v4l_tuner_norm_class_init (GstV4lTunerNormClass * klass);
+static void gst_v4l_tuner_norm_init (GstV4lTunerNorm * norm);
+
+static const GList *gst_v4l_tuner_list_channels (GstTuner * tuner);
+static void gst_v4l_tuner_set_channel (GstTuner * tuner,
+    GstTunerChannel * channel);
+static GstTunerChannel *gst_v4l_tuner_get_channel (GstTuner * tuner);
+
+static const GList *gst_v4l_tuner_list_norms (GstTuner * tuner);
+static void gst_v4l_tuner_set_norm (GstTuner * tuner, GstTunerNorm * norm);
+static GstTunerNorm *gst_v4l_tuner_get_norm (GstTuner * tuner);
+
+static void gst_v4l_tuner_set_frequency (GstTuner * tuner,
+    GstTunerChannel * channel, gulong frequency);
+static gulong gst_v4l_tuner_get_frequency (GstTuner * tuner,
+    GstTunerChannel * channel);
+static gint gst_v4l_tuner_signal_strength (GstTuner * tuner,
+    GstTunerChannel * channel);
+
+static GstTunerNormClass *norm_parent_class = NULL;
+static GstTunerChannelClass *channel_parent_class = NULL;
+
+GType
+gst_v4l_tuner_channel_get_type (void)
+{
+  static GType gst_v4l_tuner_channel_type = 0;
+
+  if (!gst_v4l_tuner_channel_type) {
+    static const GTypeInfo v4l_tuner_channel_info = {
+      sizeof (GstV4lTunerChannelClass),
+      NULL,
+      NULL,
+      (GClassInitFunc) gst_v4l_tuner_channel_class_init,
+      NULL,
+      NULL,
+      sizeof (GstV4lTunerChannel),
+      0,
+      (GInstanceInitFunc) gst_v4l_tuner_channel_init,
+      NULL
+    };
+
+    gst_v4l_tuner_channel_type =
+        g_type_register_static (GST_TYPE_TUNER_CHANNEL,
+        "GstV4lTunerChannel", &v4l_tuner_channel_info, 0);
+  }
+
+  return gst_v4l_tuner_channel_type;
+}
+
+static void
+gst_v4l_tuner_channel_class_init (GstV4lTunerChannelClass * klass)
+{
+  channel_parent_class = g_type_class_peek_parent (klass);
+}
+
+static void
+gst_v4l_tuner_channel_init (GstV4lTunerChannel * channel)
+{
+  channel->index = 0;
+  channel->audio = 0;
+  channel->tuner = 0;
+}
+
+GType
+gst_v4l_tuner_norm_get_type (void)
+{
+  static GType gst_v4l_tuner_norm_type = 0;
+
+  if (!gst_v4l_tuner_norm_type) {
+    static const GTypeInfo v4l_tuner_norm_info = {
+      sizeof (GstV4lTunerNormClass),
+      NULL,
+      NULL,
+      (GClassInitFunc) gst_v4l_tuner_norm_class_init,
+      NULL,
+      NULL,
+      sizeof (GstV4lTunerNorm),
+      0,
+      (GInstanceInitFunc) gst_v4l_tuner_norm_init,
+      NULL
+    };
+
+    gst_v4l_tuner_norm_type =
+        g_type_register_static (GST_TYPE_TUNER_NORM,
+        "GstV4lTunerNorm", &v4l_tuner_norm_info, 0);
+  }
+
+  return gst_v4l_tuner_norm_type;
+}
+
+static void
+gst_v4l_tuner_norm_class_init (GstV4lTunerNormClass * klass)
+{
+  norm_parent_class = g_type_class_peek_parent (klass);
+}
+
+static void
+gst_v4l_tuner_norm_init (GstV4lTunerNorm * norm)
+{
+  norm->index = 0;
+}
+
+void
+gst_v4l_tuner_interface_init (GstTunerClass * klass)
+{
+  /* default virtual functions */
+  klass->list_channels = gst_v4l_tuner_list_channels;
+  klass->set_channel = gst_v4l_tuner_set_channel;
+  klass->get_channel = gst_v4l_tuner_get_channel;
+
+  klass->list_norms = gst_v4l_tuner_list_norms;
+  klass->set_norm = gst_v4l_tuner_set_norm;
+  klass->get_norm = gst_v4l_tuner_get_norm;
+
+  klass->set_frequency = gst_v4l_tuner_set_frequency;
+  klass->get_frequency = gst_v4l_tuner_get_frequency;
+  klass->signal_strength = gst_v4l_tuner_signal_strength;
+}
+
+static G_GNUC_UNUSED gboolean
+gst_v4l_tuner_contains_channel (GstV4lElement * v4lelement,
+    GstV4lTunerChannel * v4lchannel)
+{
+  const GList *item;
+
+  for (item = v4lelement->channels; item != NULL; item = item->next)
+    if (item->data == v4lchannel)
+      return TRUE;
+
+  return FALSE;
+}
+
+static const GList *
+gst_v4l_tuner_list_channels (GstTuner * tuner)
+{
+  return GST_V4LELEMENT (tuner)->channels;
+}
+
+static void
+gst_v4l_tuner_set_channel (GstTuner * tuner, GstTunerChannel * channel)
+{
+  GstV4lElement *v4lelement = GST_V4LELEMENT (tuner);
+  GstV4lTunerChannel *v4lchannel = GST_V4L_TUNER_CHANNEL (channel);
+  gint norm;
+
+  /* assert that we're opened and that we're using a known item */
+  g_return_if_fail (GST_V4L_IS_OPEN (v4lelement));
+  g_return_if_fail (gst_v4l_tuner_contains_channel (v4lelement, v4lchannel));
+
+  gst_v4l_get_chan_norm (v4lelement, NULL, &norm);
+  gst_v4l_set_chan_norm (v4lelement, v4lchannel->index, norm);
+}
+
+static GstTunerChannel *
+gst_v4l_tuner_get_channel (GstTuner * tuner)
+{
+  GstV4lElement *v4lelement = GST_V4LELEMENT (tuner);
+  GList *item;
+  gint channel;
+
+  /* assert that we're opened */
+  g_return_val_if_fail (GST_V4L_IS_OPEN (v4lelement), NULL);
+
+  gst_v4l_get_chan_norm (v4lelement, &channel, NULL);
+
+  for (item = v4lelement->channels; item != NULL; item = item->next) {
+    if (channel == GST_V4L_TUNER_CHANNEL (item->data)->index)
+      return GST_TUNER_CHANNEL (item->data);
+  }
+
+  return NULL;
+}
+
+static G_GNUC_UNUSED gboolean
+gst_v4l_tuner_contains_norm (GstV4lElement * v4lelement,
+    GstV4lTunerNorm * v4lnorm)
+{
+  const GList *item;
+
+  for (item = v4lelement->norms; item != NULL; item = item->next)
+    if (item->data == v4lnorm)
+      return TRUE;
+
+  return FALSE;
+}
+
+static const GList *
+gst_v4l_tuner_list_norms (GstTuner * tuner)
+{
+  return GST_V4LELEMENT (tuner)->norms;
+}
+
+static void
+gst_v4l_tuner_set_norm (GstTuner * tuner, GstTunerNorm * norm)
+{
+  GstV4lElement *v4lelement = GST_V4LELEMENT (tuner);
+  GstV4lTunerNorm *v4lnorm = GST_V4L_TUNER_NORM (norm);
+  gint channel;
+
+  /* assert that we're opened and that we're using a known item */
+  g_return_if_fail (GST_V4L_IS_OPEN (v4lelement));
+  g_return_if_fail (gst_v4l_tuner_contains_norm (v4lelement, v4lnorm));
+
+  gst_v4l_get_chan_norm (v4lelement, &channel, NULL);
+  gst_v4l_set_chan_norm (v4lelement, channel, v4lnorm->index);
+}
+
+static GstTunerNorm *
+gst_v4l_tuner_get_norm (GstTuner * tuner)
+{
+  GstV4lElement *v4lelement = GST_V4LELEMENT (tuner);
+  GList *item;
+  gint norm;
+
+  /* assert that we're opened */
+  g_return_val_if_fail (GST_V4L_IS_OPEN (v4lelement), NULL);
+
+  gst_v4l_get_chan_norm (v4lelement, NULL, &norm);
+
+  for (item = v4lelement->norms; item != NULL; item = item->next) {
+    if (norm == GST_V4L_TUNER_NORM (item->data)->index)
+      return GST_TUNER_NORM (item->data);
+  }
+
+  return NULL;
+}
+
+static void
+gst_v4l_tuner_set_frequency (GstTuner * tuner,
+    GstTunerChannel * channel, gulong frequency)
+{
+  GstV4lElement *v4lelement = GST_V4LELEMENT (tuner);
+  GstV4lTunerChannel *v4lchannel = GST_V4L_TUNER_CHANNEL (channel);
+  gint chan;
+
+  /* assert that we're opened and that we're using a known item */
+  g_return_if_fail (GST_V4L_IS_OPEN (v4lelement));
+  g_return_if_fail (GST_TUNER_CHANNEL_HAS_FLAG (channel,
+          GST_TUNER_CHANNEL_FREQUENCY));
+  g_return_if_fail (gst_v4l_tuner_contains_channel (v4lelement, v4lchannel));
+
+  gst_v4l_get_chan_norm (v4lelement, &chan, NULL);
+  if (chan == GST_V4L_TUNER_CHANNEL (channel)->index) {
+    gst_v4l_set_frequency (v4lelement, v4lchannel->tuner, frequency);
+  }
+}
+
+static gulong
+gst_v4l_tuner_get_frequency (GstTuner * tuner, GstTunerChannel * channel)
+{
+  GstV4lElement *v4lelement = GST_V4LELEMENT (tuner);
+  GstV4lTunerChannel *v4lchannel = GST_V4L_TUNER_CHANNEL (channel);
+  gint chan;
+  gulong frequency = 0;
+
+  /* assert that we're opened and that we're using a known item */
+  g_return_val_if_fail (GST_V4L_IS_OPEN (v4lelement), 0);
+  g_return_val_if_fail (GST_TUNER_CHANNEL_HAS_FLAG (channel,
+          GST_TUNER_CHANNEL_FREQUENCY), 0);
+  g_return_val_if_fail (gst_v4l_tuner_contains_channel (v4lelement,
+          v4lchannel), 0);
+
+  gst_v4l_get_chan_norm (v4lelement, &chan, NULL);
+  if (chan == GST_V4L_TUNER_CHANNEL (channel)->index) {
+    gst_v4l_get_frequency (v4lelement, v4lchannel->tuner, &frequency);
+  }
+
+  return frequency;
+}
+
+static gint
+gst_v4l_tuner_signal_strength (GstTuner * tuner, GstTunerChannel * channel)
+{
+  GstV4lElement *v4lelement = GST_V4LELEMENT (tuner);
+  GstV4lTunerChannel *v4lchannel = GST_V4L_TUNER_CHANNEL (channel);
+  gint chan;
+  guint signal = 0;
+
+  /* assert that we're opened and that we're using a known item */
+  g_return_val_if_fail (GST_V4L_IS_OPEN (v4lelement), 0);
+  g_return_val_if_fail (GST_TUNER_CHANNEL_HAS_FLAG (channel,
+          GST_TUNER_CHANNEL_FREQUENCY), 0);
+  g_return_val_if_fail (gst_v4l_tuner_contains_channel (v4lelement,
+          v4lchannel), 0);
+
+  gst_v4l_get_chan_norm (v4lelement, &chan, NULL);
+  if (chan == GST_V4L_TUNER_CHANNEL (channel)->index &&
+      GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {
+    gst_v4l_get_signal (v4lelement, v4lchannel->tuner, &signal);
+  }
+
+  return (gint) signal;
+}