mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-08 13:18:52 +00:00
406 lines
13 KiB
C
406 lines
13 KiB
C
/* GStreamer
|
|
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
|
|
* 2000 Wim Taymans <wtay@chello.be>
|
|
* 2005 Wim Taymans <wim@fluendo.com>
|
|
* 2005 David Schleef <ds@schleef.org>
|
|
*
|
|
* 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.
|
|
*/
|
|
/**
|
|
* SECTION:element-capsfilter
|
|
*
|
|
* The element does not modify data as such, but can enforce limitations on the
|
|
* data format.
|
|
*
|
|
* <refsect2>
|
|
* <title>Example launch line</title>
|
|
* |[
|
|
* gst-launch videotestsrc ! video/x-raw,format=GRAY8 ! videoconvert ! autovideosink
|
|
* ]| Limits acceptable video from videotestsrc to be grayscale.
|
|
* </refsect2>
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "../../gst/gst-i18n-lib.h"
|
|
#include "gstcapsfilter.h"
|
|
|
|
enum
|
|
{
|
|
PROP_0,
|
|
PROP_FILTER_CAPS
|
|
};
|
|
|
|
|
|
static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
|
|
GST_PAD_SINK,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS_ANY);
|
|
|
|
static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
|
|
GST_PAD_SRC,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS_ANY);
|
|
|
|
|
|
GST_DEBUG_CATEGORY_STATIC (gst_capsfilter_debug);
|
|
#define GST_CAT_DEFAULT gst_capsfilter_debug
|
|
|
|
#define _do_init \
|
|
GST_DEBUG_CATEGORY_INIT (gst_capsfilter_debug, "capsfilter", 0, \
|
|
"capsfilter element");
|
|
#define gst_capsfilter_parent_class parent_class
|
|
G_DEFINE_TYPE_WITH_CODE (GstCapsFilter, gst_capsfilter, GST_TYPE_BASE_TRANSFORM,
|
|
_do_init);
|
|
|
|
|
|
static void gst_capsfilter_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec);
|
|
static void gst_capsfilter_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec);
|
|
static void gst_capsfilter_dispose (GObject * object);
|
|
|
|
static GstCaps *gst_capsfilter_transform_caps (GstBaseTransform * base,
|
|
GstPadDirection direction, GstCaps * caps, GstCaps * filter);
|
|
static gboolean gst_capsfilter_accept_caps (GstBaseTransform * base,
|
|
GstPadDirection direction, GstCaps * caps);
|
|
static GstFlowReturn gst_capsfilter_transform_ip (GstBaseTransform * base,
|
|
GstBuffer * buf);
|
|
static GstFlowReturn gst_capsfilter_prepare_buf (GstBaseTransform * trans,
|
|
GstBuffer * input, GstBuffer ** buf);
|
|
static gboolean gst_capsfilter_sink_event (GstBaseTransform * trans,
|
|
GstEvent * event);
|
|
static gboolean gst_capsfilter_stop (GstBaseTransform * trans);
|
|
|
|
static void
|
|
gst_capsfilter_class_init (GstCapsFilterClass * klass)
|
|
{
|
|
GObjectClass *gobject_class;
|
|
GstElementClass *gstelement_class;
|
|
GstBaseTransformClass *trans_class;
|
|
|
|
gobject_class = G_OBJECT_CLASS (klass);
|
|
gobject_class->set_property = gst_capsfilter_set_property;
|
|
gobject_class->get_property = gst_capsfilter_get_property;
|
|
gobject_class->dispose = gst_capsfilter_dispose;
|
|
|
|
g_object_class_install_property (gobject_class, PROP_FILTER_CAPS,
|
|
g_param_spec_boxed ("caps", _("Filter caps"),
|
|
_("Restrict the possible allowed capabilities (NULL means ANY). "
|
|
"Setting this property takes a reference to the supplied GstCaps "
|
|
"object."), GST_TYPE_CAPS,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
gstelement_class = GST_ELEMENT_CLASS (klass);
|
|
gst_element_class_set_static_metadata (gstelement_class,
|
|
"CapsFilter",
|
|
"Generic",
|
|
"Pass data without modification, limiting formats",
|
|
"David Schleef <ds@schleef.org>");
|
|
gst_element_class_add_pad_template (gstelement_class,
|
|
gst_static_pad_template_get (&srctemplate));
|
|
gst_element_class_add_pad_template (gstelement_class,
|
|
gst_static_pad_template_get (&sinktemplate));
|
|
|
|
trans_class = GST_BASE_TRANSFORM_CLASS (klass);
|
|
trans_class->transform_caps =
|
|
GST_DEBUG_FUNCPTR (gst_capsfilter_transform_caps);
|
|
trans_class->transform_ip = GST_DEBUG_FUNCPTR (gst_capsfilter_transform_ip);
|
|
trans_class->accept_caps = GST_DEBUG_FUNCPTR (gst_capsfilter_accept_caps);
|
|
trans_class->prepare_output_buffer =
|
|
GST_DEBUG_FUNCPTR (gst_capsfilter_prepare_buf);
|
|
trans_class->sink_event = GST_DEBUG_FUNCPTR (gst_capsfilter_sink_event);
|
|
trans_class->stop = GST_DEBUG_FUNCPTR (gst_capsfilter_stop);
|
|
}
|
|
|
|
static void
|
|
gst_capsfilter_init (GstCapsFilter * filter)
|
|
{
|
|
GstBaseTransform *trans = GST_BASE_TRANSFORM (filter);
|
|
gst_base_transform_set_gap_aware (trans, TRUE);
|
|
gst_base_transform_set_prefer_passthrough (trans, FALSE);
|
|
filter->filter_caps = gst_caps_new_any ();
|
|
}
|
|
|
|
static void
|
|
gst_capsfilter_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstCapsFilter *capsfilter = GST_CAPSFILTER (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_FILTER_CAPS:{
|
|
GstCaps *new_caps;
|
|
GstCaps *old_caps;
|
|
const GstCaps *new_caps_val = gst_value_get_caps (value);
|
|
|
|
if (new_caps_val == NULL) {
|
|
new_caps = gst_caps_new_any ();
|
|
} else {
|
|
new_caps = (GstCaps *) new_caps_val;
|
|
gst_caps_ref (new_caps);
|
|
}
|
|
|
|
GST_OBJECT_LOCK (capsfilter);
|
|
old_caps = capsfilter->filter_caps;
|
|
capsfilter->filter_caps = new_caps;
|
|
GST_OBJECT_UNLOCK (capsfilter);
|
|
|
|
gst_caps_unref (old_caps);
|
|
|
|
GST_DEBUG_OBJECT (capsfilter, "set new caps %" GST_PTR_FORMAT, new_caps);
|
|
|
|
gst_base_transform_reconfigure_sink (GST_BASE_TRANSFORM (object));
|
|
break;
|
|
}
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_capsfilter_get_property (GObject * object, guint prop_id, GValue * value,
|
|
GParamSpec * pspec)
|
|
{
|
|
GstCapsFilter *capsfilter = GST_CAPSFILTER (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_FILTER_CAPS:
|
|
GST_OBJECT_LOCK (capsfilter);
|
|
gst_value_set_caps (value, capsfilter->filter_caps);
|
|
GST_OBJECT_UNLOCK (capsfilter);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_capsfilter_dispose (GObject * object)
|
|
{
|
|
GstCapsFilter *filter = GST_CAPSFILTER (object);
|
|
|
|
gst_caps_replace (&filter->filter_caps, NULL);
|
|
g_list_free_full (filter->pending_events, (GDestroyNotify) gst_event_unref);
|
|
filter->pending_events = NULL;
|
|
|
|
G_OBJECT_CLASS (parent_class)->dispose (object);
|
|
}
|
|
|
|
static GstCaps *
|
|
gst_capsfilter_transform_caps (GstBaseTransform * base,
|
|
GstPadDirection direction, GstCaps * caps, GstCaps * filter)
|
|
{
|
|
GstCapsFilter *capsfilter = GST_CAPSFILTER (base);
|
|
GstCaps *ret, *filter_caps, *tmp;
|
|
|
|
GST_OBJECT_LOCK (capsfilter);
|
|
filter_caps = gst_caps_ref (capsfilter->filter_caps);
|
|
GST_OBJECT_UNLOCK (capsfilter);
|
|
|
|
if (filter) {
|
|
tmp =
|
|
gst_caps_intersect_full (filter, filter_caps, GST_CAPS_INTERSECT_FIRST);
|
|
gst_caps_unref (filter_caps);
|
|
filter_caps = tmp;
|
|
}
|
|
|
|
ret = gst_caps_intersect_full (filter_caps, caps, GST_CAPS_INTERSECT_FIRST);
|
|
|
|
GST_DEBUG_OBJECT (capsfilter, "input: %" GST_PTR_FORMAT, caps);
|
|
GST_DEBUG_OBJECT (capsfilter, "filter: %" GST_PTR_FORMAT, filter);
|
|
GST_DEBUG_OBJECT (capsfilter, "caps filter: %" GST_PTR_FORMAT,
|
|
filter_caps);
|
|
GST_DEBUG_OBJECT (capsfilter, "intersect: %" GST_PTR_FORMAT, ret);
|
|
|
|
gst_caps_unref (filter_caps);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_capsfilter_accept_caps (GstBaseTransform * base,
|
|
GstPadDirection direction, GstCaps * caps)
|
|
{
|
|
GstCapsFilter *capsfilter = GST_CAPSFILTER (base);
|
|
GstCaps *filter_caps;
|
|
gboolean ret;
|
|
|
|
GST_OBJECT_LOCK (capsfilter);
|
|
filter_caps = gst_caps_ref (capsfilter->filter_caps);
|
|
GST_OBJECT_UNLOCK (capsfilter);
|
|
|
|
ret = gst_caps_can_intersect (caps, filter_caps);
|
|
GST_DEBUG_OBJECT (capsfilter, "can intersect: %d", ret);
|
|
if (ret) {
|
|
/* if we can intersect, see if the other end also accepts */
|
|
if (direction == GST_PAD_SRC)
|
|
ret =
|
|
gst_pad_peer_query_accept_caps (GST_BASE_TRANSFORM_SINK_PAD (base),
|
|
caps);
|
|
else
|
|
ret =
|
|
gst_pad_peer_query_accept_caps (GST_BASE_TRANSFORM_SRC_PAD (base),
|
|
caps);
|
|
GST_DEBUG_OBJECT (capsfilter, "peer accept: %d", ret);
|
|
}
|
|
|
|
gst_caps_unref (filter_caps);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_capsfilter_transform_ip (GstBaseTransform * base, GstBuffer * buf)
|
|
{
|
|
/* No actual work here. It's all done in the prepare output buffer
|
|
* func. */
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
/* Ouput buffer preparation ... if the buffer has no caps, and our allowed
|
|
* output caps is fixed, then send the caps downstream, making sure caps are
|
|
* sent before segment event.
|
|
*
|
|
* This ensures that caps event is sent if we can, so that pipelines like:
|
|
* gst-launch filesrc location=rawsamples.raw !
|
|
* audio/x-raw,format=S16LE,rate=48000,channels=2 ! alsasink
|
|
* will work.
|
|
*/
|
|
static GstFlowReturn
|
|
gst_capsfilter_prepare_buf (GstBaseTransform * trans, GstBuffer * input,
|
|
GstBuffer ** buf)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
|
|
/* always return the input as output buffer */
|
|
*buf = input;
|
|
|
|
if (!gst_pad_has_current_caps (trans->sinkpad)) {
|
|
/* No caps. See if the output pad only supports fixed caps */
|
|
GstCapsFilter *filter = GST_CAPSFILTER (trans);
|
|
GstCaps *out_caps;
|
|
GList *pending_events = filter->pending_events;
|
|
|
|
GST_LOG_OBJECT (trans, "Input pad does not have caps");
|
|
|
|
filter->pending_events = NULL;
|
|
|
|
out_caps = gst_pad_get_current_caps (trans->srcpad);
|
|
if (out_caps == NULL) {
|
|
out_caps = gst_pad_get_allowed_caps (trans->srcpad);
|
|
g_return_val_if_fail (out_caps != NULL, GST_FLOW_ERROR);
|
|
}
|
|
|
|
out_caps = gst_caps_simplify (out_caps);
|
|
|
|
if (gst_caps_is_fixed (out_caps) && !gst_caps_is_empty (out_caps)) {
|
|
GST_DEBUG_OBJECT (trans, "Have fixed output caps %"
|
|
GST_PTR_FORMAT " to apply to srcpad", out_caps);
|
|
|
|
if (!gst_pad_has_current_caps (trans->srcpad))
|
|
if (!gst_pad_set_caps (trans->srcpad, out_caps))
|
|
ret = GST_FLOW_NOT_NEGOTIATED;
|
|
|
|
if (pending_events) {
|
|
GList *l;
|
|
|
|
for (l = g_list_last (pending_events); l; l = l->prev) {
|
|
GST_BASE_TRANSFORM_CLASS (parent_class)->sink_event (trans, l->data);
|
|
}
|
|
g_list_free (pending_events);
|
|
}
|
|
|
|
gst_caps_unref (out_caps);
|
|
} else {
|
|
gchar *caps_str = gst_caps_to_string (out_caps);
|
|
|
|
GST_DEBUG_OBJECT (trans, "Cannot choose caps. Have unfixed output caps %"
|
|
GST_PTR_FORMAT, out_caps);
|
|
gst_caps_unref (out_caps);
|
|
|
|
GST_ELEMENT_ERROR (trans, STREAM, FORMAT,
|
|
("Filter caps do not completely specify the output format"),
|
|
("Output caps are unfixed: %s", caps_str));
|
|
|
|
g_free (caps_str);
|
|
g_list_free_full (pending_events, (GDestroyNotify) pending_events);
|
|
|
|
ret = GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Queue the segment event if there was no caps event */
|
|
static gboolean
|
|
gst_capsfilter_sink_event (GstBaseTransform * trans, GstEvent * event)
|
|
{
|
|
GstCapsFilter *filter = GST_CAPSFILTER (trans);
|
|
|
|
if (GST_EVENT_TYPE (event) == GST_EVENT_FLUSH_STOP) {
|
|
GList *l;
|
|
|
|
for (l = filter->pending_events; l;) {
|
|
if (GST_EVENT_TYPE (l->data) == GST_EVENT_SEGMENT) {
|
|
gst_event_unref (l->data);
|
|
l = g_list_delete_link (l, l);
|
|
} else {
|
|
l = l->next;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!GST_EVENT_IS_STICKY (event) || GST_EVENT_TYPE (event) < GST_EVENT_CAPS)
|
|
goto done;
|
|
|
|
/* If we get EOS before any buffers, just push all pending events */
|
|
if (GST_EVENT_TYPE (event) == GST_EVENT_EOS) {
|
|
GList *l;
|
|
|
|
for (l = g_list_last (filter->pending_events); l; l = l->prev) {
|
|
GST_BASE_TRANSFORM_CLASS (parent_class)->sink_event (trans, l->data);
|
|
}
|
|
g_list_free (filter->pending_events);
|
|
filter->pending_events = NULL;
|
|
} else if (!gst_pad_has_current_caps (trans->sinkpad)) {
|
|
GST_LOG_OBJECT (trans, "Got %s event before caps, queueing",
|
|
GST_EVENT_TYPE_NAME (event));
|
|
|
|
filter->pending_events = g_list_prepend (filter->pending_events, event);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
done:
|
|
return GST_BASE_TRANSFORM_CLASS (parent_class)->sink_event (trans, event);
|
|
}
|
|
|
|
static gboolean
|
|
gst_capsfilter_stop (GstBaseTransform * trans)
|
|
{
|
|
GstCapsFilter *filter = GST_CAPSFILTER (trans);
|
|
|
|
g_list_free_full (filter->pending_events, (GDestroyNotify) gst_event_unref);
|
|
filter->pending_events = NULL;
|
|
|
|
return TRUE;
|
|
}
|