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Add buffering, eos, clock_lost and duration message handling. Add a couple of wrong hardcoded URLs to debug error reporting facilities.

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This commit is contained in:
Xavi Artigas 2013-05-17 12:19:33 +02:00
parent 76f7e541ec
commit ef7e968b81
2 changed files with 55 additions and 2 deletions
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53
gst-sdk/tutorials/xcode iOS/Tutorial 4/GStreamerBackend.m
View file

@ -26,9 +26,11 @@ GST_DEBUG_CATEGORY_STATIC (debug_category);
gboolean initialized; /* To avoid informing the UI multiple times about the initialization */
UIView *ui_video_view; /* UIView that holds the video */
GstState state; /* Current pipeline state */
GstState target_state; /* Desired pipeline state, to be set once buffering is complete */
gint64 duration; /* Cached clip duration */
gint64 desired_position; /* Position to seek to, once the pipeline is running */
GstClockTime last_seek_time; /* For seeking overflow prevention (throttling) */
gboolean is_live; /* Live streams do not use buffering */
}
/*
@ -64,12 +66,14 @@ GST_DEBUG_CATEGORY_STATIC (debug_category);
-(void) play
{
gst_element_set_state(pipeline, GST_STATE_PLAYING);
target_state = GST_STATE_PLAYING;
is_live = (gst_element_set_state (pipeline, GST_STATE_PLAYING) == GST_STATE_CHANGE_NO_PREROLL);
}
-(void) pause
{
gst_element_set_state(pipeline, GST_STATE_PAUSED);
target_state = GST_STATE_PAUSED;
is_live = (gst_element_set_state (pipeline, GST_STATE_PAUSED) == GST_STATE_CHANGE_NO_PREROLL);
}
-(void) setUri:(NSString*)uri
@ -231,6 +235,47 @@ static void error_cb (GstBus *bus, GstMessage *msg, GStreamerBackend *self)
gst_element_set_state (self->pipeline, GST_STATE_NULL);
}
/* Called when the End Of the Stream is reached. Just move to the beginning of the media and pause. */
static void eos_cb (GstBus *bus, GstMessage *msg, GStreamerBackend *self) {
self->target_state = GST_STATE_PAUSED;
self->is_live = (gst_element_set_state (self->pipeline, GST_STATE_PAUSED) == GST_STATE_CHANGE_NO_PREROLL);
execute_seek (0, self);
}
/* Called when the duration of the media changes. Just mark it as unknown, so we re-query it in the next UI refresh. */
static void duration_cb (GstBus *bus, GstMessage *msg, GStreamerBackend *self) {
self->duration = GST_CLOCK_TIME_NONE;
}
/* Called when buffering messages are received. We inform the UI about the current buffering level and
* keep the pipeline paused until 100% buffering is reached. At that point, set the desired state. */
static void buffering_cb (GstBus *bus, GstMessage *msg, GStreamerBackend *self) {
gint percent;
if (self->is_live)
return;
gst_message_parse_buffering (msg, &percent);
if (percent < 100 && self->target_state >= GST_STATE_PAUSED) {
gchar * message_string = g_strdup_printf ("Buffering %d%%", percent);
gst_element_set_state (self->pipeline, GST_STATE_PAUSED);
[self setUIMessage:message_string];
g_free (message_string);
} else if (self->target_state >= GST_STATE_PLAYING) {
gst_element_set_state (self->pipeline, GST_STATE_PLAYING);
} else if (self->target_state >= GST_STATE_PAUSED) {
[self setUIMessage:"Buffering complete"];
}
}
/* Called when the clock is lost */
static void clock_lost_cb (GstBus *bus, GstMessage *msg, GStreamerBackend *self) {
if (self->target_state >= GST_STATE_PLAYING) {
gst_element_set_state (self->pipeline, GST_STATE_PAUSED);
gst_element_set_state (self->pipeline, GST_STATE_PLAYING);
}
}
/* Notify UI about pipeline state changes */
static void state_changed_cb (GstBus *bus, GstMessage *msg, GStreamerBackend *self)
{
@ -309,7 +354,11 @@ static void state_changed_cb (GstBus *bus, GstMessage *msg, GStreamerBackend *se
g_source_attach (bus_source, context);
g_source_unref (bus_source);
g_signal_connect (G_OBJECT (bus), "message::error", (GCallback)error_cb, (__bridge void *)self);
g_signal_connect (G_OBJECT (bus), "message::eos", (GCallback)eos_cb, (__bridge void *)self);
g_signal_connect (G_OBJECT (bus), "message::state-changed", (GCallback)state_changed_cb, (__bridge void *)self);
g_signal_connect (G_OBJECT (bus), "message::duration", (GCallback)duration_cb, (__bridge void *)self);
g_signal_connect (G_OBJECT (bus), "message::buffering", (GCallback)buffering_cb, (__bridge void *)self);
g_signal_connect (G_OBJECT (bus), "message::clock-lost", (GCallback)clock_lost_cb, (__bridge void *)self);
gst_object_unref (bus);
/* Register a function that GLib will call 4 times per second */

4
gst-sdk/tutorials/xcode iOS/Tutorial 4/LibraryViewController.m
View file

@ -121,6 +121,10 @@ static NSString *CellIdentifier = @"CellIdentifier";
[entries addObject:@"http://radio.hbr1.com:19800/trance.ogg"];
[entries addObject:@"http://radio.hbr1.com:19800/tronic.aac"];
// Non-existing entries (to debug error reporting facilities)
[entries addObject:@"http://non-existing.org/Non_Existing_Server"];
[entries addObject:@"http://docs.gstreamer.com/Non_Existing_File"];
self->onlineEntries = entries;
}