gst/gsttask.*: More docs.

Original commit message from CVS:
* gst/gsttask.c:
* gst/gsttask.h:
More docs.

ChangeLog

@@ -1,3 +1,9 @@
+2005-10-20  Wim Taymans  <wim@fluendo.com>
+
+	* gst/gsttask.c:
+	* gst/gsttask.h:
+	More docs.
+
 2005-10-20  Wim Taymans  <wim@fluendo.com>
 
 	* gst/gstbin.c: (message_check), (bin_replace_message),

gst/gsttask.c

@@ -20,6 +20,42 @@
  * Boston, MA 02111-1307, USA.
  */
 
+/**
+ * SECTION:gsttask
+ * @short_description: Abstraction of GStreamer streaming threads.
+ * @see_also: #GstElement, #GstPad
+ *
+ * GstTasks are used by GstElements and GstPads to provide the data passing
+ * threads in a pipeline.
+ *
+ * A GstPad will typically start a GstTask to push or pull data to/from the
+ * peer pads. Most source elements start a GstTask to push data. In some cases
+ * a demuxer element can start a GstTask to pull data from a peer element. This
+ * is typically done when the demuxer can perform random access on the upstream
+ * peer element for improved performance.
+ *
+ * Although convenience functions exist on GstPad to start/pause/stop tasks, it 
+ * might sometimes be needed to create a GstTask manually if it is not related to
+ * a GstPad.
+ *
+ * Before the GstTask can be run, it needs a GStaticRecMutex that can be set with
+ * gst_task_set_lock().
+ *
+ * The task can be started, paused and stopped with gst_task_start(), gst_task_pause()
+ * and gst_task_stop() respectively.
+ *
+ * A GstTask will repeadedly call the GstTaskFunction with the user provided data
+ * that was provided when creating the task with gst_task_create(). Before calling
+ * the function it will acquire the provided lock.
+ *
+ * Stopping a task with gst_task_stop() will not immediatly make sure the task is
+ * not running anymnore. Use gst_task_join() to  make sure the task is completely
+ * stopped and the thread is stopped.
+ *
+ * After creating a GstTask, use gst_object_unref() to free its resources. this can
+ * only be done it the task is not running anymore.
+ */
+
 #include "gst_private.h"
 
 #include "gstinfo.h"

gst/gsttask.h

@@ -41,12 +41,26 @@ typedef void         (*GstTaskFunction)          (void *data);
 typedef struct _GstTask GstTask;
 typedef struct _GstTaskClass GstTaskClass;
 
+/**
+ * GstTaskState:
+ * @GST_TASK_STARTED: the task is started and running
+ * @GST_TASK_STOPPED:  the task is stopped
+ * @GST_TASK_PAUSED: the task is paused
+ *
+ * The different states a task can be in
+ */
 typedef enum {
   GST_TASK_STARTED,
   GST_TASK_STOPPED,
   GST_TASK_PAUSED,
 } GstTaskState;
 
+/**
+ * GST_TASK_STATE:
+ * @task: Task to get the state of
+ *
+ * Get access to the state of the task.
+ */
 #define GST_TASK_STATE(task)		(GST_TASK_CAST(task)->state)
 
 #define GST_TASK_GET_COND(task)		(GST_TASK_CAST(task)->cond)
@@ -56,6 +70,17 @@ typedef enum {
 
 #define GST_TASK_GET_LOCK(task)		(GST_TASK_CAST(task)->lock)
 
+/**
+ * GstTask:
+ * @state: the state of the task
+ * @cond: used to pause/resume the task
+ * @lock: The lock taken when iterating the taskfunction
+ * @func: the function executed by this task
+ * @data: data passed to the task function
+ * @running: a flag indicating that the task is running.
+ *
+ * The GstTask object.
+ */
 struct _GstTask {
   GstObject      object;