From 74931b8db091d94e0caa4cb2d33ceb918f38c933 Mon Sep 17 00:00:00 2001
From: David Schleef <ds@schleef.org>
Date: Fri, 20 Dec 2002 20:12:28 +0000
Subject: [PATCH] Fix to allow parameters to be set by gst-launch

Original commit message from CVS:
Fix to allow parameters to be set by gst-launch
---
 sys/v4l/gstv4lelement.c | 18 +++++++++++++-----
 sys/v4l/v4l_calls.c     | 42 ++++++++++++++++++++++++++++++++++++------
 sys/v4l/v4l_calls.h     |  1 +
 3 files changed, 50 insertions(+), 11 deletions(-)

diff --git a/sys/v4l/gstv4lelement.c b/sys/v4l/gstv4lelement.c
index bc7bd6d..b29a60b 100644
--- a/sys/v4l/gstv4lelement.c
+++ b/sys/v4l/gstv4lelement.c
@@ -65,6 +65,7 @@ enum {
   ARG_DISPLAY,
   ARG_VIDEOWINDOW,
   ARG_DO_OVERLAY,
+  ARG_SIGNAL,
 };
 
 
@@ -142,6 +143,9 @@ gst_v4lelement_class_init (GstV4lElementClass *klass)
   g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FREQUENCY,
     g_param_spec_ulong("frequency","frequency","frequency",
     0,G_MAXULONG,0,G_PARAM_READWRITE));
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_SIGNAL,
+    g_param_spec_uint("signal","signal","signal",
+    0,65535,0,G_PARAM_READABLE));
 
   g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_HAS_AUDIO,
     g_param_spec_boolean("has_audio","has_audio","has_audio",
@@ -289,11 +293,9 @@ gst_v4lelement_set_property (GObject      *object,
       break;
     case ARG_FREQUENCY:
       v4lelement->frequency = g_value_get_ulong(value);
-      if (GST_V4L_IS_OPEN(v4lelement) && !GST_V4L_IS_ACTIVE(v4lelement))
-      {
-        if (gst_v4l_has_tuner(v4lelement))
-          if (!gst_v4l_set_frequency(v4lelement, v4lelement->frequency))
-            return;
+      if (gst_v4l_has_tuner(v4lelement))
+        if (!gst_v4l_set_frequency(v4lelement, v4lelement->frequency))
+          return;
       }
       break;
     case ARG_MUTE:
@@ -432,6 +434,12 @@ gst_v4lelement_get_property (GObject    *object,
           gst_v4l_get_frequency(v4lelement, &temp_ul);
       g_value_set_ulong(value, temp_ul);
       break;
+    case ARG_SIGNAL:
+      if (GST_V4L_IS_OPEN(v4lelement))
+        if (gst_v4l_has_tuner(v4lelement))
+          gst_v4l_get_signal(v4lelement, &temp_i);
+      g_value_set_uint(value, temp_i);
+      break;
     case ARG_HAS_AUDIO:
       g_value_set_boolean(value, FALSE);
       if (GST_V4L_IS_OPEN(v4lelement))
diff --git a/sys/v4l/v4l_calls.c b/sys/v4l/v4l_calls.c
index 2cee265..26cbc54 100644
--- a/sys/v4l/v4l_calls.c
+++ b/sys/v4l/v4l_calls.c
@@ -243,8 +243,40 @@ gst_v4l_has_tuner (GstV4lElement *v4lelement)
   DEBUG("checking whether device has a tuner");
   GST_V4L_CHECK_OPEN(v4lelement);
 
-  return (v4lelement->vcap.type & VID_TYPE_TUNER &&
-          v4lelement->vchan.flags & VIDEO_VC_TUNER);
+  return v4lelement->vcap.type & VID_TYPE_TUNER;
+}
+
+
+/******************************************************
+ * gst_v4l_get_signal():
+ *   get the current signal
+ * return value: TRUE on success, FALSE on error
+ ******************************************************/
+
+gboolean
+gst_v4l_get_signal (GstV4lElement *v4lelement,
+                       guint        *signal)
+{
+	struct video_tuner tuner;
+
+  DEBUG("getting tuner signal");
+  GST_V4L_CHECK_OPEN(v4lelement);
+
+  if (!gst_v4l_has_tuner(v4lelement))
+    return FALSE;
+
+  tuner.tuner = 0;
+  if (ioctl(v4lelement->video_fd, VIDIOCGTUNER, &tuner) < 0)
+  {
+    gst_element_error(GST_ELEMENT(v4lelement),
+      "Error getting tuner signal: %s",
+      sys_errlist[errno]);
+    return FALSE;
+  }
+
+  *signal = tuner.signal;
+
+  return TRUE;
 }
 
 
@@ -288,8 +320,7 @@ gst_v4l_set_frequency (GstV4lElement *v4lelement,
 {
   DEBUG("setting tuner frequency to %lu", frequency);
   GST_V4L_CHECK_OPEN(v4lelement);
-  GST_V4L_CHECK_NOT_ACTIVE(v4lelement);
-
+  
   if (!gst_v4l_has_tuner(v4lelement))
     return FALSE;
 
@@ -424,8 +455,7 @@ gst_v4l_has_audio (GstV4lElement *v4lelement)
   DEBUG("checking whether device has audio");
   GST_V4L_CHECK_OPEN(v4lelement);
 
-  return (v4lelement->vcap.audios > 0 &&
-          v4lelement->vchan.flags & VIDEO_VC_AUDIO);
+  return v4lelement->vcap.audios > 0;
 }
 
 
diff --git a/sys/v4l/v4l_calls.h b/sys/v4l/v4l_calls.h
index c6cc9f6..18e2e0b 100644
--- a/sys/v4l/v4l_calls.h
+++ b/sys/v4l/v4l_calls.h
@@ -116,6 +116,7 @@ GList   *gst_v4l_get_chan_names (GstV4lElement *v4lelement);
 
 /* frequency control */
 gboolean gst_v4l_has_tuner      (GstV4lElement *v4lelement);
+gboolean gst_v4l_get_signal     (GstV4lElement *v4lelement, guint  *signal);
 gboolean gst_v4l_get_frequency  (GstV4lElement *v4lelement, gulong *frequency);
 gboolean gst_v4l_set_frequency  (GstV4lElement *v4lelement, gulong  frequency);
 
-- 
2.7.4