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Implement GstElement::query/get_query_types vfuncs

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This commit is contained in:
Sebastian Dröge 2009-01-30 15:50:16 +01:00
parent 061a96fa94
commit f638caef57
1 changed files with 114 additions and 8 deletions
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122
gst/mxf/mxfdemux.c
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@ -632,11 +632,11 @@ gst_mxf_demux_choose_package (GstMXFDemux * demux)
for (i = 0; i < demux->preface->content_storage->n_packages; i++) {
if (demux->preface->content_storage->packages[i] &&
MXF_IS_METADATA_MATERIAL_PACKAGE (demux->preface->content_storage->
packages[i])) {
MXF_IS_METADATA_MATERIAL_PACKAGE (demux->preface->
content_storage->packages[i])) {
ret =
MXF_METADATA_GENERIC_PACKAGE (demux->preface->content_storage->
packages[i]);
MXF_METADATA_GENERIC_PACKAGE (demux->preface->
content_storage->packages[i]);
break;
}
}
@ -1280,8 +1280,8 @@ gst_mxf_demux_pad_next_component (GstMXFDemux * demux, GstMXFDemuxPad * pad)
pad->current_component_index);
pad->current_component =
MXF_METADATA_SOURCE_CLIP (sequence->structural_components[pad->
current_component_index]);
MXF_METADATA_SOURCE_CLIP (sequence->
structural_components[pad->current_component_index]);
if (pad->current_component == NULL) {
GST_ERROR_OBJECT (demux, "No such structural component");
return GST_FLOW_ERROR;
@ -1289,8 +1289,8 @@ gst_mxf_demux_pad_next_component (GstMXFDemux * demux, GstMXFDemuxPad * pad)
if (!pad->current_component->source_package
|| !pad->current_component->source_package->top_level
|| !MXF_METADATA_GENERIC_PACKAGE (pad->current_component->
source_package)->tracks) {
|| !MXF_METADATA_GENERIC_PACKAGE (pad->
current_component->source_package)->tracks) {
GST_ERROR_OBJECT (demux, "Invalid component");
return GST_FLOW_ERROR;
}
@ -2890,6 +2890,109 @@ gst_mxf_demux_sink_event (GstPad * pad, GstEvent * event)
return ret;
}
static const GstQueryType *
gst_mxf_demux_get_query_types (GstElement * element)
{
static const GstQueryType types[] = {
GST_QUERY_POSITION,
GST_QUERY_DURATION,
0
};
return types;
}
static gboolean
gst_mxf_demux_query (GstElement * element, GstQuery * query)
{
GstMXFDemux *demux = GST_MXF_DEMUX (element);
gboolean ret = FALSE;
GST_DEBUG_OBJECT (demux, "handling query %s",
gst_query_type_get_name (GST_QUERY_TYPE (query)));
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:
{
GstFormat format;
gint64 pos;
gst_query_parse_position (query, &format, NULL);
if (format != GST_FORMAT_TIME)
goto error;
pos = demux->segment.last_stop;
GST_DEBUG_OBJECT (demux,
"Returning position %" G_GINT64_FORMAT " in format %s", pos,
gst_format_get_name (format));
gst_query_set_position (query, format, pos);
ret = TRUE;
break;
}
case GST_QUERY_DURATION:{
gint64 duration = -1;
GstFormat format;
guint i;
gst_query_parse_duration (query, &format, NULL);
if (format != GST_FORMAT_TIME)
goto error;
if (!demux->src)
goto done;
for (i = 0; i < demux->src->len; i++) {
GstMXFDemuxPad *pad = g_ptr_array_index (demux->src, i);
gint64 pdur = -1;
if (!pad->material_track || !pad->material_track->parent.sequence)
continue;
pdur = pad->material_track->parent.sequence->duration;
if (pad->material_track->edit_rate.n == 0 ||
pad->material_track->edit_rate.d == 0)
continue;
pdur =
gst_util_uint64_scale (pdur,
GST_SECOND * pad->material_track->edit_rate.d,
pad->material_track->edit_rate.n);
duration = MAX (duration, pdur);
}
if (duration == -1) {
GST_DEBUG_OBJECT (demux, "No duration known (yet)");
goto done;
}
GST_DEBUG_OBJECT (demux,
"Returning duration %" G_GINT64_FORMAT " in format %s", duration,
gst_format_get_name (format));
gst_query_set_duration (query, format, duration);
ret = TRUE;
break;
}
default:
/* else forward upstream */
ret = gst_pad_peer_query (demux->sinkpad, query);
break;
}
done:
return ret;
/* ERRORS */
error:
{
GST_DEBUG_OBJECT (demux, "query failed");
goto done;
}
}
static GstStateChangeReturn
gst_mxf_demux_change_state (GstElement * element, GstStateChange transition)
{
@ -3014,6 +3117,9 @@ gst_mxf_demux_class_init (GstMXFDemuxClass * klass)
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_mxf_demux_change_state);
gstelement_class->query = GST_DEBUG_FUNCPTR (gst_mxf_demux_query);
gstelement_class->get_query_types =
GST_DEBUG_FUNCPTR (gst_mxf_demux_get_query_types);
}
static void