rtspconnection: add flush method

Add a method to set/unset the flushing state that makes _wait_backlog()
unlock.

See https://bugzilla.gnome.org/show_bug.cgi?id=725898
This commit is contained in:
Wim Taymans 2014-03-28 09:32:20 +01:00
parent f270b267c5
commit 8d439edd7a
2 changed files with 67 additions and 9 deletions

View file

@ -3008,6 +3008,7 @@ struct _GstRTSPWatch
gsize max_bytes;
guint max_messages;
GCond queue_not_full;
gboolean flushing;
GstRTSPWatchFuncs funcs;
@ -3423,6 +3424,7 @@ gst_rtsp_watch_new (GstRTSPConnection * conn,
gst_rtsp_watch_reset (result);
result->keep_running = TRUE;
result->flushing = FALSE;
result->funcs = *funcs;
result->user_data = user_data;
@ -3594,7 +3596,7 @@ gst_rtsp_watch_get_send_backlog (GstRTSPWatch * watch,
* #GST_RTSP_ENOMEM.
*
* Returns: #GST_RTSP_OK on success. #GST_RTSP_ENOMEM when the backlog limits
* are reached.
* are reached. #GST_RTSP_EINTR when @watch was flushing.
*/
GstRTSPResult
gst_rtsp_watch_write_data (GstRTSPWatch * watch, const guint8 * data,
@ -3610,6 +3612,8 @@ gst_rtsp_watch_write_data (GstRTSPWatch * watch, const guint8 * data,
g_return_val_if_fail (size != 0, GST_RTSP_EINVAL);
g_mutex_lock (&watch->mutex);
if (watch->flushing)
goto flushing;
/* try to send the message synchronously first */
if (watch->messages->length == 0 && watch->write_data == NULL) {
@ -3681,6 +3685,13 @@ done:
return res;
/* ERRORS */
flushing:
{
GST_DEBUG ("we are flushing");
g_mutex_unlock (&watch->mutex);
g_free ((gpointer) data);
return GST_RTSP_EINTR;
}
too_much_backlog:
{
GST_WARNING ("too much backlog: max_bytes %" G_GSIZE_FORMAT ", current %"
@ -3729,7 +3740,8 @@ gst_rtsp_watch_send_message (GstRTSPWatch * watch, GstRTSPMessage * message,
* @watch: a #GstRTSPWatch
* @timeout: a #GTimeVal timeout
*
* Wait until there is place in the backlog queue or @timeout is reached.
* Wait until there is place in the backlog queue, @timeout is reached
* or @watch is set to flushing.
*
* If @timeout is #NULL this function can block forever. If @timeout
* contains a valid timeout, this function will return #GST_RTSP_ETIMEOUT
@ -3741,6 +3753,7 @@ gst_rtsp_watch_send_message (GstRTSPWatch * watch, GstRTSPMessage * message,
*
* Returns: #GST_RTSP_OK when if there is room in queue.
* #GST_RTSP_ETIMEOUT when @timeout was reached.
* #GST_RTSP_EINTR when @watch is flushing
* #GST_RTSP_EINVAL when called with invalid parameters.
*
* Since: 1.4
@ -3757,13 +3770,56 @@ gst_rtsp_watch_wait_backlog (GstRTSPWatch * watch, GTimeVal * timeout)
end_time = g_get_monotonic_time () + GST_TIME_AS_USECONDS (to);
g_mutex_lock (&watch->mutex);
if (watch->flushing)
goto flushing;
while (IS_BACKLOG_FULL (watch)) {
if (!g_cond_wait_until (&watch->queue_not_full, &watch->mutex, end_time)) {
g_mutex_unlock (&watch->mutex);
return GST_RTSP_ETIMEOUT;
}
gboolean res;
res = g_cond_wait_until (&watch->queue_not_full, &watch->mutex, end_time);
if (watch->flushing)
goto flushing;
if (!res)
goto timeout;
}
g_mutex_unlock (&watch->mutex);
return GST_RTSP_OK;
/* ERRORS */
flushing:
{
GST_DEBUG ("we are flushing");
g_mutex_unlock (&watch->mutex);
return GST_RTSP_EINTR;
}
timeout:
{
GST_DEBUG ("we timed out");
g_mutex_unlock (&watch->mutex);
return GST_RTSP_ETIMEOUT;
}
}
/**
* gst_rtsp_watch_set_flushing:
* @watch: a #GstRTSPWatch
* @flushing: new flushing state
*
* When @flushing is %TRUE, abort a call to gst_rtsp_watch_wait_backlog()
* and make sure gst_rtsp_watch_write_data() returns immediately with
* #GST_RTSP_EINTR.
*
* Since: 1.4
*/
void
gst_rtsp_watch_set_flushing (GstRTSPWatch * watch, gboolean flushing)
{
g_return_if_fail (watch != NULL);
g_mutex_lock (&watch->mutex);
watch->flushing = flushing;
g_cond_signal (&watch->queue_not_full);
g_mutex_unlock (&watch->mutex);
}

View file

@ -217,6 +217,8 @@ GstRTSPResult gst_rtsp_watch_send_message (GstRTSPWatch *watch,
GstRTSPResult gst_rtsp_watch_wait_backlog (GstRTSPWatch * watch,
GTimeVal *timeout);
void gst_rtsp_watch_set_flushing (GstRTSPWatch * watch,
gboolean flush);
G_END_DECLS
#endif /* __GST_RTSP_CONNECTION_H__ */