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cogl-gst: emit ready signal on sink only after the first frame is uploaded

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Developers listening to the 'ready' signal on CoglGstVideoSink might
call process the current frame once the signal is triggered. We need
to ensure the first frame has been uploaded before letting people know
that the sink is ready.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 53882aa0728c5540d8452045006a763e29d4306d)
This commit is contained in:
Lionel Landwerlin 2013-08-09 22:44:51 +01:00 committed by Robert Bragg
parent 71f6023e8a
commit 69247c10f3
1 changed files with 10 additions and 6 deletions
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16
cogl-gst/cogl-gst-video-sink.c
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@ -1027,6 +1027,7 @@ cogl_gst_source_dispatch (GSource *source,
CoglGstSource *gst_source= (CoglGstSource*) source;
CoglGstVideoSinkPrivate *priv = gst_source->sink->priv;
GstBuffer *buffer;
gboolean pipeline_ready = FALSE;
g_mutex_lock (&gst_source->buffer_lock);
@ -1048,9 +1049,7 @@ cogl_gst_source_dispatch (GSource *source,
* the application requests it so we can emit the signal.
* However we'll actually generate the pipeline lazily only if
* the application actually asks for it. */
g_signal_emit (gst_source->sink,
video_sink_signals[PIPELINE_READY_SIGNAL],
0 /* detail */);
pipeline_ready = TRUE;
}
buffer = gst_source->buffer;
@ -1063,14 +1062,19 @@ cogl_gst_source_dispatch (GSource *source,
if (!priv->renderer->upload (gst_source->sink, buffer))
goto fail_upload;
g_signal_emit (gst_source->sink,
video_sink_signals[NEW_FRAME_SIGNAL], 0,
NULL);
gst_buffer_unref (buffer);
}
else
GST_WARNING_OBJECT (gst_source->sink, "No buffers available for display");
if (G_UNLIKELY (pipeline_ready))
g_signal_emit (gst_source->sink,
video_sink_signals[PIPELINE_READY_SIGNAL],
0 /* detail */);
g_signal_emit (gst_source->sink,
video_sink_signals[NEW_FRAME_SIGNAL], 0,
NULL);
return TRUE;