Expose default devices

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>

diff --git a/src/mediactl-priv.h b/src/mediactl-priv.h
index 37e60aa..4644165 100644 (file)
--- a/src/mediactl-priv.h
+++ b/src/mediactl-priv.h
@@ -49,6 +49,13 @@ struct media_device {
 
        void (*debug_handler)(void *, ...);
        void *debug_priv;
+
+       struct {
+               struct media_entity *v4l;
+               struct media_entity *fb;
+               struct media_entity *alsa;
+               struct media_entity *dvb;
+       } def;
 };
 
 #define media_dbg(media, ...) \

diff --git a/src/mediactl.c b/src/mediactl.c
index dd5bd57..4da334a 100644 (file)
--- a/src/mediactl.c
+++ b/src/mediactl.c
@@ -145,6 +145,21 @@ const char *media_entity_get_devname(struct media_entity *entity)
        return entity->devname[0] ? entity->devname : NULL;
 }
 
+struct media_entity *media_get_default_entity(struct media_device *media,
+                                             unsigned int type)
+{
+       switch (type) {
+       case MEDIA_ENT_T_DEVNODE_V4L:
+               return media->def.v4l;
+       case MEDIA_ENT_T_DEVNODE_FB:
+               return media->def.fb;
+       case MEDIA_ENT_T_DEVNODE_ALSA:
+               return media->def.alsa;
+       case MEDIA_ENT_T_DEVNODE_DVB:
+               return media->def.dvb;
+       }
+}
+
 const struct media_device_info *media_get_info(struct media_device *media)
 {
        return &media->info;
@@ -519,6 +534,23 @@ static int media_enum_entities(struct media_device *media)
 
                media->entities_count++;
 
+               if (entity->info.flags & MEDIA_ENT_FL_DEFAULT) {
+                       switch (entity->info.type) {
+                       case MEDIA_ENT_T_DEVNODE_V4L:
+                               media->def.v4l = entity;
+                               break;
+                       case MEDIA_ENT_T_DEVNODE_FB:
+                               media->def.fb = entity;
+                               break;
+                       case MEDIA_ENT_T_DEVNODE_ALSA:
+                               media->def.alsa = entity;
+                               break;
+                       case MEDIA_ENT_T_DEVNODE_DVB:
+                               media->def.dvb = entity;
+                               break;
+                       }
+               }
+
                /* Find the corresponding device name. */
                if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE &&
                    media_entity_type(entity) != MEDIA_ENT_T_V4L2_SUBDEV)

diff --git a/src/mediactl.h b/src/mediactl.h
index e2c93b8..b74be0b 100644 (file)
--- a/src/mediactl.h
+++ b/src/mediactl.h
@@ -243,6 +243,25 @@ unsigned int media_get_entities_count(struct media_device *media);
  */
 struct media_entity *media_get_entity(struct media_device *media, unsigned int index);
 
+/**
+ * @brief Get the default entity for a given type
+ * @param media - media device.
+ * @param type - entity type.
+ *
+ * This function returns the default entity of the requested type. @a type must
+ * be one of
+ *
+ *     MEDIA_ENT_T_DEVNODE_V4L
+ *     MEDIA_ENT_T_DEVNODE_FB
+ *     MEDIA_ENT_T_DEVNODE_ALSA
+ *     MEDIA_ENT_T_DEVNODE_DVB
+ *
+ * @return A pointer to the default entity for the type if it exists, or NULL
+ * otherwise.
+ */
+struct media_entity *media_get_default_entity(struct media_device *media,
+                                             unsigned int type);
+
 /**
  * @brief Get the media device information
  * @param media - media device.