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lamemp3enc: implement latency query
The encoder's latency is deduced from the framesize. Fixes #618896.
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1 changed files with 57 additions and 0 deletions
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@ -386,6 +386,57 @@ setup_failed:
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}
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}
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static gint64
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gst_lamemp3enc_get_latency (GstLameMP3Enc * lame)
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{
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return gst_util_uint64_scale_int (lame_get_framesize (lame->lgf),
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GST_SECOND, lame->samplerate);
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}
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static gboolean
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gst_lamemp3enc_src_query (GstPad * pad, GstQuery * query)
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{
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gboolean res = TRUE;
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GstLameMP3Enc *lame;
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GstPad *peerpad;
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lame = GST_LAMEMP3ENC (gst_pad_get_parent (pad));
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peerpad = gst_pad_get_peer (GST_PAD (lame->sinkpad));
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_LATENCY:
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{
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if ((res = gst_pad_query (peerpad, query))) {
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gboolean live;
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GstClockTime min_latency, max_latency;
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gint64 latency;
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if (lame->lgf == NULL)
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break;
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gst_query_parse_latency (query, &live, &min_latency, &max_latency);
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latency = gst_lamemp3enc_get_latency (lame);
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/* add our latency */
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min_latency += latency;
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if (max_latency != -1)
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max_latency += latency;
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gst_query_set_latency (query, live, min_latency, max_latency);
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}
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break;
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}
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default:
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res = gst_pad_query (peerpad, query);
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break;
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}
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gst_object_unref (peerpad);
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gst_object_unref (lame);
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return res;
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}
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static void
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gst_lamemp3enc_init (GstLameMP3Enc * lame)
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{
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@ -403,6 +454,8 @@ gst_lamemp3enc_init (GstLameMP3Enc * lame)
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lame->srcpad =
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gst_pad_new_from_static_template (&gst_lamemp3enc_src_template, "src");
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gst_pad_set_query_function (lame->srcpad,
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GST_DEBUG_FUNCPTR (gst_lamemp3enc_src_query));
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gst_pad_set_setcaps_function (lame->srcpad,
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GST_DEBUG_FUNCPTR (gst_lamemp3enc_src_setcaps));
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gst_element_add_pad (GST_ELEMENT (lame), lame->srcpad);
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@ -746,6 +799,10 @@ gst_lamemp3enc_setup (GstLameMP3Enc * lame)
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if (lame->lgf == NULL)
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return FALSE;
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/* post latency message on the bus */
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gst_element_post_message (GST_ELEMENT (lame),
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gst_message_new_latency (GST_OBJECT (lame)));
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/* copy the parameters over */
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lame_set_in_samplerate (lame->lgf, lame->samplerate);
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