v4l2: add norm property

Based on a patch by Guennadi Liakhovetski.

v2: updates because I forgot to add GstTuner interface to v4l2sink
v3: update to add all possible values to norm enum

sys/v4l2/gstv4l2object.c

@@ -56,7 +56,7 @@ GST_DEBUG_CATEGORY_EXTERN (v4l2_debug);
 #define DEFAULT_PROP_DEVICE_NAME 	NULL
 #define DEFAULT_PROP_DEVICE_FD          -1
 #define DEFAULT_PROP_FLAGS              0
-#define DEFAULT_PROP_NORM               NULL
+#define DEFAULT_PROP_TV_NORM            0
 #define DEFAULT_PROP_CHANNEL            NULL
 #define DEFAULT_PROP_FREQUENCY          0
 
@@ -316,6 +316,58 @@ gst_v4l2_device_get_type (void)
   return v4l2_device_type;
 }
 
+#define GST_TYPE_V4L2_TV_NORM (gst_v4l2_tv_norm_get_type ())
+static GType
+gst_v4l2_tv_norm_get_type (void)
+{
+  static GType v4l2_tv_norm = 0;
+
+  if (!v4l2_tv_norm) {
+    static const GEnumValue tv_norms[] = {
+      {0, "none", "none"},
+
+      {V4L2_STD_NTSC, "NTSC", "NTSC"},
+      {V4L2_STD_NTSC_M, "NTSC-M", "NTSC-M"},
+      {V4L2_STD_NTSC_M_JP, "NTSC-M-JP", "NTSC-M-JP"},
+      {V4L2_STD_NTSC_M_KR, "NTSC-M-KR", "NTSC-M-KR"},
+      {V4L2_STD_NTSC_443, "NTSC-443", "NTSC-443"},
+
+      {V4L2_STD_PAL, "PAL", "PAL"},
+      {V4L2_STD_PAL_BG, "PAL-BG", "PAL-BG"},
+      {V4L2_STD_PAL_B, "PAL-B", "PAL-B"},
+      {V4L2_STD_PAL_B1, "PAL-B1", "PAL-B1"},
+      {V4L2_STD_PAL_G, "PAL-G", "PAL-G"},
+      {V4L2_STD_PAL_H, "PAL-H", "PAL-H"},
+      {V4L2_STD_PAL_I, "PAL-I", "PAL-I"},
+      {V4L2_STD_PAL_DK, "PAL-DK", "PAL-DK"},
+      {V4L2_STD_PAL_D, "PAL-D", "PAL-D"},
+      {V4L2_STD_PAL_D1, "PAL-D1", "PAL-D1"},
+      {V4L2_STD_PAL_K, "PAL-K", "PAL-K"},
+      {V4L2_STD_PAL_M, "PAL-M", "PAL-M"},
+      {V4L2_STD_PAL_N, "PAL-N", "PAL-N"},
+      {V4L2_STD_PAL_Nc, "PAL-Nc", "PAL-Nc"},
+      {V4L2_STD_PAL_60, "PAL-60", "PAL-60"},
+
+      {V4L2_STD_SECAM, "SECAM", "SECAM"},
+      {V4L2_STD_SECAM_B, "SECAM-B", "SECAM-B"},
+      {V4L2_STD_SECAM_G, "SECAM-G", "SECAM-G"},
+      {V4L2_STD_SECAM_H, "SECAM-H", "SECAM-H"},
+      {V4L2_STD_SECAM_DK, "SECAM-DK", "SECAM-DK"},
+      {V4L2_STD_SECAM_D, "SECAM-D", "SECAM-D"},
+      {V4L2_STD_SECAM_K, "SECAM-K", "SECAM-K"},
+      {V4L2_STD_SECAM_K1, "SECAM-K1", "SECAM-K1"},
+      {V4L2_STD_SECAM_L, "SECAM-L", "SECAM-L"},
+      {V4L2_STD_SECAM_LC, "SECAM-Lc", "SECAM-Lc"},
+
+      {0, NULL, NULL}
+    };
+
+    v4l2_tv_norm = g_enum_register_static ("V4L2_TV_norms", tv_norms);
+  }
+
+  return v4l2_tv_norm;
+}
+
 void
 gst_v4l2_object_install_properties_helper (GObjectClass * gobject_class,
     const char *default_device)
@@ -384,6 +436,19 @@ gst_v4l2_object_install_properties_helper (GObjectClass * gobject_class,
           "Hue or color balance", G_MININT,
           G_MAXINT, 0,
           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
+
+  /**
+   * GstV4l2Src:norm
+   *
+   * TV norm
+   *
+   * Since: 0.10.30
+   */
+  g_object_class_install_property (gobject_class, PROP_TV_NORM,
+      g_param_spec_enum ("norm", "TV norm",
+          "video standard",
+          GST_TYPE_V4L2_TV_NORM, DEFAULT_PROP_TV_NORM,
+          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
 }
 
 GstV4l2Object *
@@ -440,9 +505,6 @@ gst_v4l2_object_destroy (GstV4l2Object * v4l2object)
   if (v4l2object->channel)
     g_free (v4l2object->channel);
 
-  if (v4l2object->norm)
-    g_free (v4l2object->norm);
-
   if (v4l2object->formats) {
     gst_v4l2_object_clear_format_list (v4l2object);
   }
@@ -510,23 +572,10 @@ gst_v4l2_object_set_property_helper (GstV4l2Object * v4l2object,
       return TRUE;
     }
       break;
-#if 0
+    case PROP_TV_NORM:
-    case PROP_NORM:
+      v4l2object->tv_norm = g_value_get_enum (value);
-      if (GST_V4L2_IS_OPEN (v4l2object)) {
-        GstTuner *tuner = GST_TUNER (v4l2object->element);
-        GstTunerNorm *norm = gst_tuner_find_norm_by_name (tuner,
-            (gchar *) g_value_get_string (value));
-
-        if (norm) {
-          /* like gst_tuner_set_norm (tuner, norm)
-             without g_object_notify */
-          gst_v4l2_tuner_set_norm (v4l2object, norm);
-        }
-      } else {
-        g_free (v4l2object->norm);
-        v4l2object->norm = g_value_dup_string (value);
-      }
       break;
+#if 0
     case PROP_CHANNEL:
       if (GST_V4L2_IS_OPEN (v4l2object)) {
         GstTuner *tuner = GST_TUNER (v4l2object->element);
@@ -631,6 +680,9 @@ gst_v4l2_object_get_property_helper (GstV4l2Object * v4l2object,
       return TRUE;
     }
       break;
+    case PROP_TV_NORM:
+      g_value_set_enum (value, v4l2object->tv_norm);
+      break;
     default:
       return FALSE;
       break;
@@ -650,16 +702,18 @@ gst_v4l2_set_defaults (GstV4l2Object * v4l2object)
 
   tuner = GST_TUNER (v4l2object->element);
 
-  if (v4l2object->norm)
+  if (v4l2object->tv_norm)
-    norm = gst_tuner_find_norm_by_name (tuner, v4l2object->norm);
+    norm = gst_v4l2_tuner_get_norm_by_std_id (v4l2object, v4l2object->tv_norm);
+  GST_DEBUG_OBJECT (v4l2object->element, "tv_norm=%d, norm=%p",
+      v4l2object->tv_norm, norm);
   if (norm) {
     gst_tuner_set_norm (tuner, norm);
   } else {
     norm =
         GST_TUNER_NORM (gst_tuner_get_norm (GST_TUNER (v4l2object->element)));
     if (norm) {
-      g_free (v4l2object->norm);
+      v4l2object->tv_norm =
-      v4l2object->norm = g_strdup (norm->label);
+          gst_v4l2_tuner_get_std_id_by_norm (v4l2object, norm);
       gst_tuner_norm_changed (tuner, norm);
     }
   }
@@ -1887,13 +1941,15 @@ default_frame_sizes:
     }
 
     /* Since we can't get framerate directly, try to use the current norm */
-    if (v4l2object->norm && v4l2object->norms) {
+    if (v4l2object->tv_norm && v4l2object->norms) {
       GList *norms;
       GstTunerNorm *norm = NULL;
+      GstTunerNorm *current =
+          gst_v4l2_tuner_get_norm_by_std_id (v4l2object, v4l2object->tv_norm);
 
       for (norms = v4l2object->norms; norms != NULL; norms = norms->next) {
         norm = (GstTunerNorm *) norms->data;
-        if (!strcmp (norm->label, v4l2object->norm))
+        if (!strcmp (norm->label, current->label))
           break;
       }
       /* If it's possible, set framerate to that (discrete) value */

sys/v4l2/gstv4l2object.h

@@ -108,7 +108,7 @@ struct _GstV4l2Object {
   GList *channels;
 
   /* properties */
-  gchar *norm;
+  v4l2_std_id tv_norm;
   gchar *channel;
   gulong frequency;
 
@@ -133,11 +133,12 @@ GType gst_v4l2_object_get_type (void);
     PROP_DEVICE,			\
     PROP_DEVICE_NAME,			\
     PROP_DEVICE_FD,			\
-    PROP_FLAGS,			\
+    PROP_FLAGS,                         \
     PROP_BRIGHTNESS,			\
     PROP_CONTRAST,			\
     PROP_SATURATION,			\
-    PROP_HUE
+    PROP_HUE,                           \
+    PROP_TV_NORM
 
 /* create/destroy */
 GstV4l2Object *	gst_v4l2_object_new 		 (GstElement * element,

sys/v4l2/gstv4l2sink.c

@@ -55,6 +55,7 @@
 
 
 #include "gstv4l2colorbalance.h"
+#include "gstv4l2tuner.h"
 #ifdef HAVE_XVIDEO
 #include "gstv4l2xoverlay.h"
 #endif
@@ -91,6 +92,7 @@ enum
 
 GST_IMPLEMENT_V4L2_PROBE_METHODS (GstV4l2SinkClass, gst_v4l2sink);
 GST_IMPLEMENT_V4L2_COLOR_BALANCE_METHODS (GstV4l2Sink, gst_v4l2sink);
+GST_IMPLEMENT_V4L2_TUNER_METHODS (GstV4l2Sink, gst_v4l2sink);
 #ifdef HAVE_XVIDEO
 GST_IMPLEMENT_V4L2_XOVERLAY_METHODS (GstV4l2Sink, gst_v4l2sink);
 #endif
@@ -105,10 +107,12 @@ gst_v4l2sink_iface_supported (GstImplementsInterface * iface, GType iface_type)
   g_assert (iface_type == GST_TYPE_X_OVERLAY ||
       iface_type == GST_TYPE_NAVIGATION ||
       iface_type == GST_TYPE_COLOR_BALANCE ||
-      iface_type == GST_TYPE_VIDEO_ORIENTATION);
+      iface_type == GST_TYPE_VIDEO_ORIENTATION ||
+      iface_type == GST_TYPE_TUNER);
 #else
   g_assert (iface_type == GST_TYPE_COLOR_BALANCE ||
-      iface_type == GST_TYPE_VIDEO_ORIENTATION);
+      iface_type == GST_TYPE_VIDEO_ORIENTATION ||
+      iface_type == GST_TYPE_TUNER);
 #endif
 
   if (v4l2object->video_fd == -1)
@@ -151,6 +155,11 @@ gst_v4l2sink_init_interfaces (GType type)
     NULL,
     NULL,
   };
+  static const GInterfaceInfo v4l2_tuner_info = {
+    (GInterfaceInitFunc) gst_v4l2sink_tuner_interface_init,
+    NULL,
+    NULL,
+  };
 #ifdef HAVE_XVIDEO
   static const GInterfaceInfo v4l2_xoverlay_info = {
     (GInterfaceInitFunc) gst_v4l2sink_xoverlay_interface_init,
@@ -181,6 +190,7 @@ gst_v4l2sink_init_interfaces (GType type)
 
   g_type_add_interface_static (type,
       GST_TYPE_IMPLEMENTS_INTERFACE, &v4l2iface_info);
+  g_type_add_interface_static (type, GST_TYPE_TUNER, &v4l2_tuner_info);
 #ifdef HAVE_XVIDEO
   g_type_add_interface_static (type, GST_TYPE_X_OVERLAY, &v4l2_xoverlay_info);
   g_type_add_interface_static (type,

sys/v4l2/gstv4l2tuner.c

@@ -237,7 +237,6 @@ gst_v4l2_tuner_set_norm (GstV4l2Object * v4l2object, GstTunerNorm * norm)
 GstTunerNorm *
 gst_v4l2_tuner_get_norm (GstV4l2Object * v4l2object)
 {
-  GList *item;
   v4l2_std_id norm;
 
   /* assert that we're opened and that we're using a known item */
@@ -245,6 +244,14 @@ gst_v4l2_tuner_get_norm (GstV4l2Object * v4l2object)
 
   gst_v4l2_get_norm (v4l2object, &norm);
 
+  return gst_v4l2_tuner_get_norm_by_std_id (v4l2object, norm);
+}
+
+GstTunerNorm *
+gst_v4l2_tuner_get_norm_by_std_id (GstV4l2Object * v4l2object, v4l2_std_id norm)
+{
+  GList *item;
+
   for (item = v4l2object->norms; item != NULL; item = item->next) {
     if (norm & GST_V4L2_TUNER_NORM (item->data)->index)
       return (GstTunerNorm *) item->data;
@@ -253,6 +260,20 @@ gst_v4l2_tuner_get_norm (GstV4l2Object * v4l2object)
   return NULL;
 }
 
+v4l2_std_id
+gst_v4l2_tuner_get_std_id_by_norm (GstV4l2Object * v4l2object,
+    GstTunerNorm * norm)
+{
+  GList *item;
+
+  for (item = v4l2object->norms; item != NULL; item = item->next) {
+    if (norm == GST_TUNER_NORM (item->data))
+      return GST_V4L2_TUNER_NORM (item->data)->index;
+  }
+
+  return 0;
+}
+
 void
 gst_v4l2_tuner_set_frequency_and_notify (GstV4l2Object * v4l2object,
     GstTunerChannel * channel, gulong frequency)

sys/v4l2/gstv4l2tuner.h

@@ -94,6 +94,11 @@ void              gst_v4l2_tuner_set_norm_and_notify      (GstV4l2Object * v4l2o
 GstTunerNorm*     gst_v4l2_tuner_get_norm                 (GstV4l2Object * v4l2object);
 gboolean          gst_v4l2_tuner_set_norm                 (GstV4l2Object * v4l2object,
 		                                           GstTunerNorm * norm);
+GstTunerNorm*     gst_v4l2_tuner_get_norm_by_std_id       (GstV4l2Object * v4l2object,
+                                               v4l2_std_id norm);
+v4l2_std_id       gst_v4l2_tuner_get_std_id_by_norm       (GstV4l2Object * v4l2object,
+                                               GstTunerNorm * norm);
+
 /* frequency */
 void              gst_v4l2_tuner_set_frequency_and_notify (GstV4l2Object * v4l2object,
                                                            GstTunerChannel * channel, 

sys/v4l2/v4l2_calls.c

@@ -229,6 +229,9 @@ gst_v4l2_fill_lists (GstV4l2Object * v4l2object)
         standard.frameperiod.denominator, standard.frameperiod.numerator);
     v4l2norm->index = standard.id;
 
+    GST_DEBUG_OBJECT (v4l2object->element, "index=%08x, label=%s",
+        (unsigned int) v4l2norm->index, norm->label);
+
     v4l2object->norms = g_list_prepend (v4l2object->norms, (gpointer) norm);
   }
   v4l2object->norms = g_list_reverse (v4l2object->norms);