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basertppayload: Make instance init faster by not reading /dev/urandom 3 times

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... which is the default seed when creating a new GRand. Because
GLib in older versions used buffered IO this would take a lot of time.

Instead use the global GRand for getting random numbers and keep the
three instance GRand for backward compatibility with a simple seed.

Fixes bug #593284.
This commit is contained in:
Jonas Holmberg 2009-09-01 10:39:52 +02:00 committed by Sebastian Dröge
parent e7368354d5
commit ec91d508af
2 changed files with 7 additions and 7 deletions
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13
gst-libs/gst/rtp/gstbasertppayload.c
View file

@ -241,9 +241,9 @@ gst_basertppayload_init (GstBaseRTPPayload * basertppayload, gpointer g_class)
gst_basertppayload_chain);
gst_element_add_pad (GST_ELEMENT (basertppayload), basertppayload->sinkpad);
basertppayload->seq_rand = g_rand_new ();
basertppayload->ssrc_rand = g_rand_new ();
basertppayload->ts_rand = g_rand_new ();
basertppayload->seq_rand = g_rand_new_with_seed (g_random_int ());
basertppayload->ssrc_rand = g_rand_new_with_seed (g_random_int ());
basertppayload->ts_rand = g_rand_new_with_seed (g_random_int ());
basertppayload->mtu = DEFAULT_MTU;
basertppayload->pt = DEFAULT_PT;
@ -902,20 +902,19 @@ gst_basertppayload_change_state (GstElement * element,
gst_segment_init (&basertppayload->segment, GST_FORMAT_UNDEFINED);
if (priv->seqnum_offset_random)
basertppayload->seqnum_base =
g_rand_int_range (basertppayload->seq_rand, 0, G_MAXUINT16);
basertppayload->seqnum_base = g_random_int_range (0, G_MAXUINT16);
else
basertppayload->seqnum_base = basertppayload->seqnum_offset;
priv->next_seqnum = basertppayload->seqnum_base;
basertppayload->seqnum = basertppayload->seqnum_base;
if (priv->ssrc_random)
basertppayload->current_ssrc = g_rand_int (basertppayload->ssrc_rand);
basertppayload->current_ssrc = g_random_int ();
else
basertppayload->current_ssrc = basertppayload->ssrc;
if (priv->ts_offset_random)
basertppayload->ts_base = g_rand_int (basertppayload->ts_rand);
basertppayload->ts_base = g_random_int ();
else
basertppayload->ts_base = basertppayload->ts_offset;
basertppayload->timestamp = basertppayload->ts_base;

1
gst-libs/gst/rtp/gstbasertppayload.h
View file

@ -79,6 +79,7 @@ struct _GstBaseRTPPayload
GstPad *sinkpad;
GstPad *srcpad;
/* FIXME 0.11: none of these GRands are used anymore, remove them */
GRand *seq_rand;
GRand *ssrc_rand;
GRand *ts_rand;