mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-20 23:36:38 +00:00
144 lines
4.6 KiB
C
144 lines
4.6 KiB
C
/* GStreamer
|
|
* Copyright (C) 2011 Mark Nauwelaerts <mark.nauwelaerts@collabora.co.uk>.
|
|
* Copyright (C) 2011 Nokia Corporation. All rights reserved.
|
|
* Contact: Stefan Kost <stefan.kost@nokia.com>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <gst/audio/audio.h>
|
|
#include "gstaudioutilsprivate.h"
|
|
|
|
/*
|
|
* Takes caps and copies its audio fields to tmpl_caps
|
|
*/
|
|
static GstCaps *
|
|
__gst_audio_element_proxy_caps (GstElement * element, GstCaps * templ_caps,
|
|
GstCaps * caps)
|
|
{
|
|
GstCaps *result = gst_caps_new_empty ();
|
|
gint i, j;
|
|
gint templ_caps_size = gst_caps_get_size (templ_caps);
|
|
gint caps_size = gst_caps_get_size (caps);
|
|
|
|
for (i = 0; i < templ_caps_size; i++) {
|
|
GQuark q_name =
|
|
gst_structure_get_name_id (gst_caps_get_structure (templ_caps, i));
|
|
GstCapsFeatures *features = gst_caps_get_features (templ_caps, i);
|
|
|
|
for (j = 0; j < caps_size; j++) {
|
|
const GstStructure *caps_s = gst_caps_get_structure (caps, j);
|
|
const GValue *val;
|
|
GstStructure *s;
|
|
GstCaps *tmp = gst_caps_new_empty ();
|
|
|
|
s = gst_structure_new_id_empty (q_name);
|
|
if ((val = gst_structure_get_value (caps_s, "rate")))
|
|
gst_structure_set_value (s, "rate", val);
|
|
if ((val = gst_structure_get_value (caps_s, "channels")))
|
|
gst_structure_set_value (s, "channels", val);
|
|
if ((val = gst_structure_get_value (caps_s, "channels-mask")))
|
|
gst_structure_set_value (s, "channels-mask", val);
|
|
|
|
gst_caps_append_structure_full (tmp, s,
|
|
gst_caps_features_copy (features));
|
|
result = gst_caps_merge (result, tmp);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* __gst_audio_element_proxy_getcaps:
|
|
* @element: a #GstElement
|
|
* @sinkpad: the element's sink #GstPad
|
|
* @srcpad: the element's source #GstPad
|
|
* @initial_caps: initial caps
|
|
* @filter: filter caps
|
|
*
|
|
* Returns caps that express @initial_caps (or sink template caps if
|
|
* @initial_caps == NULL) restricted to rate/channels/...
|
|
* combinations supported by downstream elements (e.g. muxers).
|
|
*
|
|
* Returns: a #GstCaps owned by caller
|
|
*/
|
|
GstCaps *
|
|
__gst_audio_element_proxy_getcaps (GstElement * element, GstPad * sinkpad,
|
|
GstPad * srcpad, GstCaps * initial_caps, GstCaps * filter)
|
|
{
|
|
GstCaps *templ_caps, *src_templ_caps;
|
|
GstCaps *peer_caps;
|
|
GstCaps *allowed;
|
|
GstCaps *fcaps, *filter_caps;
|
|
|
|
/* Allow downstream to specify rate/channels constraints
|
|
* and forward them upstream for audio converters to handle
|
|
*/
|
|
templ_caps = initial_caps ? gst_caps_ref (initial_caps) :
|
|
gst_pad_get_pad_template_caps (sinkpad);
|
|
src_templ_caps = gst_pad_get_pad_template_caps (srcpad);
|
|
if (filter && !gst_caps_is_any (filter)) {
|
|
GstCaps *proxy_filter =
|
|
__gst_audio_element_proxy_caps (element, src_templ_caps, filter);
|
|
|
|
peer_caps = gst_pad_peer_query_caps (srcpad, proxy_filter);
|
|
gst_caps_unref (proxy_filter);
|
|
} else {
|
|
peer_caps = gst_pad_peer_query_caps (srcpad, NULL);
|
|
}
|
|
|
|
allowed = gst_caps_intersect_full (peer_caps, src_templ_caps,
|
|
GST_CAPS_INTERSECT_FIRST);
|
|
|
|
gst_caps_unref (src_templ_caps);
|
|
gst_caps_unref (peer_caps);
|
|
|
|
if (!allowed || gst_caps_is_any (allowed)) {
|
|
fcaps = templ_caps;
|
|
goto done;
|
|
} else if (gst_caps_is_empty (allowed)) {
|
|
fcaps = gst_caps_ref (allowed);
|
|
goto done;
|
|
}
|
|
|
|
GST_LOG_OBJECT (element, "template caps %" GST_PTR_FORMAT, templ_caps);
|
|
GST_LOG_OBJECT (element, "allowed caps %" GST_PTR_FORMAT, allowed);
|
|
|
|
filter_caps = __gst_audio_element_proxy_caps (element, templ_caps, allowed);
|
|
|
|
fcaps = gst_caps_intersect (filter_caps, templ_caps);
|
|
gst_caps_unref (filter_caps);
|
|
gst_caps_unref (templ_caps);
|
|
|
|
if (filter) {
|
|
GST_LOG_OBJECT (element, "intersecting with %" GST_PTR_FORMAT, filter);
|
|
filter_caps = gst_caps_intersect (fcaps, filter);
|
|
gst_caps_unref (fcaps);
|
|
fcaps = filter_caps;
|
|
}
|
|
|
|
done:
|
|
gst_caps_replace (&allowed, NULL);
|
|
|
|
GST_LOG_OBJECT (element, "proxy caps %" GST_PTR_FORMAT, fcaps);
|
|
|
|
return fcaps;
|
|
}
|