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lamemp3enc: implement latency query

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The encoder's latency is deduced from the framesize. Fixes #618896.
This commit is contained in:
Tristan Matthews 2010-05-20 11:28:47 -04:00 committed by Sebastian Dröge
parent 9a08857c1f
commit ec7c300853
1 changed files with 57 additions and 0 deletions
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57
ext/lame/gstlamemp3enc.c
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@ -386,6 +386,57 @@ setup_failed:
}
}
static gint64
gst_lamemp3enc_get_latency (GstLameMP3Enc * lame)
{
return gst_util_uint64_scale_int (lame_get_framesize (lame->lgf),
GST_SECOND, lame->samplerate);
}
static gboolean
gst_lamemp3enc_src_query (GstPad * pad, GstQuery * query)
{
gboolean res = TRUE;
GstLameMP3Enc *lame;
GstPad *peerpad;
lame = GST_LAMEMP3ENC (gst_pad_get_parent (pad));
peerpad = gst_pad_get_peer (GST_PAD (lame->sinkpad));
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
if ((res = gst_pad_query (peerpad, query))) {
gboolean live;
GstClockTime min_latency, max_latency;
gint64 latency;
if (lame->lgf == NULL)
break;
gst_query_parse_latency (query, &live, &min_latency, &max_latency);
latency = gst_lamemp3enc_get_latency (lame);
/* add our latency */
min_latency += latency;
if (max_latency != -1)
max_latency += latency;
gst_query_set_latency (query, live, min_latency, max_latency);
}
break;
}
default:
res = gst_pad_query (peerpad, query);
break;
}
gst_object_unref (peerpad);
gst_object_unref (lame);
return res;
}
static void
gst_lamemp3enc_init (GstLameMP3Enc * lame)
{
@ -403,6 +454,8 @@ gst_lamemp3enc_init (GstLameMP3Enc * lame)
lame->srcpad =
gst_pad_new_from_static_template (&gst_lamemp3enc_src_template, "src");
gst_pad_set_query_function (lame->srcpad,
GST_DEBUG_FUNCPTR (gst_lamemp3enc_src_query));
gst_pad_set_setcaps_function (lame->srcpad,
GST_DEBUG_FUNCPTR (gst_lamemp3enc_src_setcaps));
gst_element_add_pad (GST_ELEMENT (lame), lame->srcpad);
@ -746,6 +799,10 @@ gst_lamemp3enc_setup (GstLameMP3Enc * lame)
if (lame->lgf == NULL)
return FALSE;
/* post latency message on the bus */
gst_element_post_message (GST_ELEMENT (lame),
gst_message_new_latency (GST_OBJECT (lame)));
/* copy the parameters over */
lame_set_in_samplerate (lame->lgf, lame->samplerate);