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scaletempo: Implement LATENCY query

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This commit is contained in:
Sebastian Dröge 2012-10-23 14:06:37 +02:00 committed by Tim-Philipp Müller
parent c7589817cb
commit 502eb8d1b7
1 changed files with 66 additions and 0 deletions
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66
gst/audiofx/gstscaletempo.c
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@ -151,6 +151,7 @@ struct _GstScaletempoPrivate
guint (*best_overlap_offset) (GstScaletempo * scaletempo);
/* gstreamer */
gint64 segment_start;
GstClockTime latency;
/* threads */
gboolean reinit_buffers;
};
@ -314,6 +315,7 @@ reinit_buffers (GstScaletempo * scaletempo)
gint i, j;
guint frames_overlap;
guint new_size;
GstClockTime latency;
guint frames_stride = p->ms_stride * p->sample_rate / 1000.0;
p->bytes_stride = frames_stride * p->bytes_per_frame;
@ -411,9 +413,19 @@ reinit_buffers (GstScaletempo * scaletempo)
p->bytes_queued = new_queued;
}
}
p->bytes_queue_max = new_size;
p->buf_queue = g_realloc (p->buf_queue, p->bytes_queue_max);
latency =
gst_util_uint64_scale (p->bytes_queue_max, GST_SECOND,
p->bytes_per_frame * p->sample_rate);
if (p->latency != latency) {
p->latency = latency;
gst_element_post_message (GST_ELEMENT (scaletempo),
gst_message_new_latency (GST_OBJECT (scaletempo)));
}
p->bytes_stride_scaled = p->bytes_stride * p->scale;
p->frames_stride_scaled = p->bytes_stride_scaled / p->bytes_per_frame;
@ -598,6 +610,59 @@ gst_scaletempo_set_caps (GstBaseTransform * trans,
return TRUE;
}
static gboolean
gst_scaletempo_query (GstBaseTransform * trans, GstPadDirection direction,
GstQuery * query)
{
GstScaletempo *scaletempo = GST_SCALETEMPO (trans);
GstScaletempoPrivate *p = scaletempo->priv;
if (direction == GST_PAD_SRC) {
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:{
GstPad *peer;
gboolean res;
if ((peer = gst_pad_get_peer (GST_BASE_TRANSFORM_SINK_PAD (trans)))) {
if ((res = gst_pad_query (peer, query))) {
GstClockTime min, max;
gboolean live;
gst_query_parse_latency (query, &live, &min, &max);
GST_DEBUG_OBJECT (scaletempo, "Peer latency: min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min), GST_TIME_ARGS (max));
/* add our own latency */
GST_DEBUG_OBJECT (scaletempo, "Our latency: %" GST_TIME_FORMAT,
GST_TIME_ARGS (p->latency));
min += p->latency;
if (max != GST_CLOCK_TIME_NONE)
max += p->latency;
GST_DEBUG_OBJECT (scaletempo, "Calculated total latency : min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min), GST_TIME_ARGS (max));
gst_query_set_latency (query, live, min, max);
}
gst_object_unref (peer);
}
return TRUE;
break;
}
default:{
return GST_BASE_TRANSFORM_CLASS (parent_class)->query (trans, direction,
query);
break;
}
}
} else {
return GST_BASE_TRANSFORM_CLASS (parent_class)->query (trans, direction,
query);
}
}
/* GObject vmethod implementations */
static void
@ -710,6 +775,7 @@ gst_scaletempo_class_init (GstScaletempoClass * klass)
basetransform_class->transform_size =
GST_DEBUG_FUNCPTR (gst_scaletempo_transform_size);
basetransform_class->transform = GST_DEBUG_FUNCPTR (gst_scaletempo_transform);
basetransform_class->query = GST_DEBUG_FUNCPTR (gst_scaletempo_query);
}
static void