mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-04 23:46:43 +00:00
94ba019397
Ensure all access to v4l2object->pool imply taking a lock and a hard ref on the pool Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3481>
1244 lines
39 KiB
C
1244 lines
39 KiB
C
/*
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* Copyright (C) 2014 Collabora Ltd.
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* Author: Nicolas Dufresne <nicolas.dufresne@collabora.co.uk>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <unistd.h>
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#include <string.h>
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#include "gstv4l2object.h"
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#include "gstv4l2transform.h"
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#include <string.h>
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#include <glib/gi18n-lib.h>
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#define DEFAULT_PROP_DEVICE "/dev/video10"
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#define V4L2_TRANSFORM_QUARK \
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g_quark_from_static_string("gst-v4l2-transform-info")
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GST_DEBUG_CATEGORY_STATIC (gst_v4l2_transform_debug);
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#define GST_CAT_DEFAULT gst_v4l2_transform_debug
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enum
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{
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PROP_0,
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V4L2_STD_OBJECT_PROPS,
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PROP_DISABLE_PASSTHROUGH
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};
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typedef struct
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{
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gchar *device;
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GstCaps *sink_caps;
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GstCaps *src_caps;
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} GstV4l2TransformCData;
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#define gst_v4l2_transform_parent_class parent_class
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G_DEFINE_ABSTRACT_TYPE (GstV4l2Transform, gst_v4l2_transform,
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GST_TYPE_BASE_TRANSFORM);
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static void
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gst_v4l2_transform_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec)
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{
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GstV4l2Transform *self = GST_V4L2_TRANSFORM (object);
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switch (prop_id) {
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case PROP_CAPTURE_IO_MODE:
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gst_v4l2_object_set_property_helper (self->v4l2capture, prop_id, value,
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pspec);
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break;
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case PROP_DISABLE_PASSTHROUGH:
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self->disable_passthrough = g_value_get_boolean (value);
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break;
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/* By default, only set on output */
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default:
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if (!gst_v4l2_object_set_property_helper (self->v4l2output,
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prop_id, value, pspec)) {
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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}
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break;
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}
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}
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static void
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gst_v4l2_transform_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec)
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{
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GstV4l2Transform *self = GST_V4L2_TRANSFORM (object);
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switch (prop_id) {
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case PROP_CAPTURE_IO_MODE:
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gst_v4l2_object_get_property_helper (self->v4l2capture, prop_id, value,
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pspec);
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break;
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case PROP_DISABLE_PASSTHROUGH:
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g_value_set_boolean (value, self->disable_passthrough);
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break;
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/* By default read from output */
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default:
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if (!gst_v4l2_object_get_property_helper (self->v4l2output,
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prop_id, value, pspec)) {
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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}
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break;
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}
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}
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static gboolean
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gst_v4l2_transform_open (GstV4l2Transform * self)
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{
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GstV4l2Error error = GST_V4L2_ERROR_INIT;
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GST_DEBUG_OBJECT (self, "Opening");
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if (!gst_v4l2_object_open (self->v4l2output, &error))
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goto failure;
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if (!gst_v4l2_object_open_shared (self->v4l2capture, self->v4l2output))
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goto failure;
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self->probed_sinkcaps = gst_v4l2_object_get_caps (self->v4l2output,
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gst_v4l2_object_get_raw_caps ());
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if (gst_caps_is_empty (self->probed_sinkcaps))
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goto no_input_format;
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self->probed_srccaps = gst_v4l2_object_get_caps (self->v4l2capture,
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gst_v4l2_object_get_raw_caps ());
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if (gst_caps_is_empty (self->probed_srccaps))
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goto no_output_format;
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return TRUE;
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no_input_format:
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GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
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(_("Converter on device %s has no supported input format"),
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self->v4l2output->videodev), (NULL));
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goto failure;
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no_output_format:
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GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
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(_("Converter on device %s has no supported output format"),
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self->v4l2output->videodev), (NULL));
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goto failure;
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failure:
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if (GST_V4L2_IS_OPEN (self->v4l2output))
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gst_v4l2_object_close (self->v4l2output);
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if (GST_V4L2_IS_OPEN (self->v4l2capture))
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gst_v4l2_object_close (self->v4l2capture);
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gst_caps_replace (&self->probed_srccaps, NULL);
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gst_caps_replace (&self->probed_sinkcaps, NULL);
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gst_v4l2_error (self, &error);
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return FALSE;
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}
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static void
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gst_v4l2_transform_close (GstV4l2Transform * self)
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{
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GST_DEBUG_OBJECT (self, "Closing");
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gst_v4l2_object_close (self->v4l2output);
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gst_v4l2_object_close (self->v4l2capture);
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gst_caps_replace (&self->probed_srccaps, NULL);
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gst_caps_replace (&self->probed_sinkcaps, NULL);
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}
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static gboolean
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gst_v4l2_transform_stop (GstBaseTransform * trans)
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{
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GstV4l2Transform *self = GST_V4L2_TRANSFORM (trans);
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GST_DEBUG_OBJECT (self, "Stop");
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gst_v4l2_object_stop (self->v4l2output);
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gst_v4l2_object_stop (self->v4l2capture);
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gst_caps_replace (&self->incaps, NULL);
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gst_caps_replace (&self->outcaps, NULL);
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return TRUE;
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}
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static gboolean
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gst_v4l2_transform_set_caps (GstBaseTransform * trans, GstCaps * incaps,
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GstCaps * outcaps)
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{
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GstV4l2Error error = GST_V4L2_ERROR_INIT;
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GstV4l2Transform *self = GST_V4L2_TRANSFORM (trans);
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if (self->disable_passthrough)
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gst_base_transform_set_passthrough (trans, FALSE);
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if (self->incaps && self->outcaps) {
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if (gst_caps_is_equal (incaps, self->incaps) &&
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gst_caps_is_equal (outcaps, self->outcaps)) {
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GST_DEBUG_OBJECT (trans, "Caps did not changed");
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return TRUE;
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}
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}
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gst_v4l2_object_stop (self->v4l2output);
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gst_v4l2_object_stop (self->v4l2capture);
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if (!gst_v4l2_object_set_format (self->v4l2output, incaps, &error))
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goto incaps_failed;
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if (!gst_v4l2_object_set_format (self->v4l2capture, outcaps, &error))
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goto outcaps_failed;
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gst_caps_replace (&self->incaps, incaps);
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gst_caps_replace (&self->outcaps, outcaps);
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/* FIXME implement fallback if crop not supported */
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if (!gst_v4l2_object_setup_padding (self->v4l2output))
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goto failed;
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if (!gst_v4l2_object_setup_padding (self->v4l2capture))
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goto failed;
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return TRUE;
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incaps_failed:
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{
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GST_ERROR_OBJECT (self, "failed to set input caps: %" GST_PTR_FORMAT,
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incaps);
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gst_v4l2_error (self, &error);
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goto failed;
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}
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outcaps_failed:
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{
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gst_v4l2_object_stop (self->v4l2output);
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GST_ERROR_OBJECT (self, "failed to set output caps: %" GST_PTR_FORMAT,
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outcaps);
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gst_v4l2_error (self, &error);
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goto failed;
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}
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failed:
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return FALSE;
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}
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static gboolean
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gst_v4l2_transform_query (GstBaseTransform * trans, GstPadDirection direction,
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GstQuery * query)
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{
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GstV4l2Transform *self = GST_V4L2_TRANSFORM (trans);
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gboolean ret = TRUE;
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_CAPS:{
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GstCaps *filter, *caps = NULL, *result = NULL;
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GstPad *pad, *otherpad;
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gst_query_parse_caps (query, &filter);
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if (direction == GST_PAD_SRC) {
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pad = GST_BASE_TRANSFORM_SRC_PAD (trans);
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otherpad = GST_BASE_TRANSFORM_SINK_PAD (trans);
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if (self->probed_srccaps)
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caps = gst_caps_ref (self->probed_srccaps);
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} else {
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pad = GST_BASE_TRANSFORM_SINK_PAD (trans);
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otherpad = GST_BASE_TRANSFORM_SRC_PAD (trans);
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if (self->probed_sinkcaps)
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caps = gst_caps_ref (self->probed_sinkcaps);
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}
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if (!caps)
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caps = gst_pad_get_pad_template_caps (pad);
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if (filter) {
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GstCaps *tmp = caps;
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caps = gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST);
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gst_caps_unref (tmp);
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}
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result = gst_pad_peer_query_caps (otherpad, caps);
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result = gst_caps_make_writable (result);
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gst_caps_append (result, caps);
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GST_DEBUG_OBJECT (self, "Returning %s caps %" GST_PTR_FORMAT,
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GST_PAD_NAME (pad), result);
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gst_query_set_caps_result (query, result);
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gst_caps_unref (result);
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break;
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}
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default:
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ret = GST_BASE_TRANSFORM_CLASS (parent_class)->query (trans, direction,
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query);
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break;
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}
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return ret;
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}
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static gboolean
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gst_v4l2_transform_decide_allocation (GstBaseTransform * trans,
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GstQuery * query)
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{
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GstV4l2Transform *self = GST_V4L2_TRANSFORM (trans);
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gboolean ret = FALSE;
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GST_DEBUG_OBJECT (self, "called");
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if (gst_v4l2_object_decide_allocation (self->v4l2capture, query)) {
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gboolean pool_active;
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GstBufferPool *pool = gst_v4l2_object_get_buffer_pool (self->v4l2capture);
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ret = GST_BASE_TRANSFORM_CLASS (parent_class)->decide_allocation (trans,
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query);
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pool_active = gst_buffer_pool_set_active (pool, TRUE);
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if (pool)
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gst_object_unref (pool);
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if (!pool_active)
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goto activate_failed;
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}
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return ret;
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activate_failed:
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GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
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("failed to activate bufferpool"), ("failed to activate bufferpool"));
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return TRUE;
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}
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static gboolean
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gst_v4l2_transform_propose_allocation (GstBaseTransform * trans,
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GstQuery * decide_query, GstQuery * query)
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{
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GstV4l2Transform *self = GST_V4L2_TRANSFORM (trans);
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gboolean ret = FALSE;
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GST_DEBUG_OBJECT (self, "called");
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if (decide_query == NULL)
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ret = TRUE;
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else
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ret = gst_v4l2_object_propose_allocation (self->v4l2output, query);
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if (ret)
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ret = GST_BASE_TRANSFORM_CLASS (parent_class)->propose_allocation (trans,
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decide_query, query);
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return ret;
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}
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/* copies the given caps */
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static GstCaps *
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gst_v4l2_transform_caps_remove_format_info (GstCaps * caps)
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{
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GstStructure *st;
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GstCapsFeatures *f;
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gint i, n;
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GstCaps *res;
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res = gst_caps_new_empty ();
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n = gst_caps_get_size (caps);
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for (i = 0; i < n; i++) {
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st = gst_caps_get_structure (caps, i);
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f = gst_caps_get_features (caps, i);
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/* If this is already expressed by the existing caps
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* skip this structure */
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if (i > 0 && gst_caps_is_subset_structure_full (res, st, f))
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continue;
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st = gst_structure_copy (st);
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/* Only remove format info for the cases when we can actually convert */
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if (!gst_caps_features_is_any (f)
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&& gst_caps_features_is_equal (f,
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GST_CAPS_FEATURES_MEMORY_SYSTEM_MEMORY))
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gst_structure_remove_fields (st, "format", "colorimetry", "chroma-site",
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"width", "height", "pixel-aspect-ratio", NULL);
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gst_caps_append_structure_full (res, st, gst_caps_features_copy (f));
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}
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return res;
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}
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|
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/* The caps can be transformed into any other caps with format info removed.
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* However, we should prefer passthrough, so if passthrough is possible,
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* put it first in the list. */
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static GstCaps *
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gst_v4l2_transform_transform_caps (GstBaseTransform * btrans,
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GstPadDirection direction, GstCaps * caps, GstCaps * filter)
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{
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GstCaps *tmp, *tmp2;
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GstCaps *result;
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/* Get all possible caps that we can transform to */
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tmp = gst_v4l2_transform_caps_remove_format_info (caps);
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|
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if (filter) {
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tmp2 = gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST);
|
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gst_caps_unref (tmp);
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tmp = tmp2;
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}
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result = tmp;
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|
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GST_DEBUG_OBJECT (btrans, "transformed %" GST_PTR_FORMAT " into %"
|
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GST_PTR_FORMAT, caps, result);
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|
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return result;
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}
|
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|
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static GstCaps *
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gst_v4l2_transform_fixate_caps (GstBaseTransform * trans,
|
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GstPadDirection direction, GstCaps * caps, GstCaps * othercaps)
|
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{
|
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GstStructure *ins, *outs;
|
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const GValue *from_par, *to_par;
|
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GValue fpar = { 0, }, tpar = {
|
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0,};
|
|
|
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othercaps = gst_caps_truncate (othercaps);
|
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othercaps = gst_caps_make_writable (othercaps);
|
|
|
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GST_DEBUG_OBJECT (trans, "trying to fixate othercaps %" GST_PTR_FORMAT
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" based on caps %" GST_PTR_FORMAT, othercaps, caps);
|
|
|
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ins = gst_caps_get_structure (caps, 0);
|
|
outs = gst_caps_get_structure (othercaps, 0);
|
|
|
|
{
|
|
const gchar *in_format;
|
|
|
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in_format = gst_structure_get_string (ins, "format");
|
|
if (in_format) {
|
|
/* Try to set output format for pass through */
|
|
gst_structure_fixate_field_string (outs, "format", in_format);
|
|
}
|
|
|
|
}
|
|
|
|
from_par = gst_structure_get_value (ins, "pixel-aspect-ratio");
|
|
to_par = gst_structure_get_value (outs, "pixel-aspect-ratio");
|
|
|
|
/* If we're fixating from the sinkpad we always set the PAR and
|
|
* assume that missing PAR on the sinkpad means 1/1 and
|
|
* missing PAR on the srcpad means undefined
|
|
*/
|
|
if (direction == GST_PAD_SINK) {
|
|
if (!from_par) {
|
|
g_value_init (&fpar, GST_TYPE_FRACTION);
|
|
gst_value_set_fraction (&fpar, 1, 1);
|
|
from_par = &fpar;
|
|
}
|
|
if (!to_par) {
|
|
g_value_init (&tpar, GST_TYPE_FRACTION_RANGE);
|
|
gst_value_set_fraction_range_full (&tpar, 1, G_MAXINT, G_MAXINT, 1);
|
|
to_par = &tpar;
|
|
}
|
|
} else {
|
|
if (!to_par) {
|
|
g_value_init (&tpar, GST_TYPE_FRACTION);
|
|
gst_value_set_fraction (&tpar, 1, 1);
|
|
to_par = &tpar;
|
|
|
|
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, 1, 1,
|
|
NULL);
|
|
}
|
|
if (!from_par) {
|
|
g_value_init (&fpar, GST_TYPE_FRACTION);
|
|
gst_value_set_fraction (&fpar, 1, 1);
|
|
from_par = &fpar;
|
|
}
|
|
}
|
|
|
|
/* we have both PAR but they might not be fixated */
|
|
{
|
|
gint from_w, from_h, from_par_n, from_par_d, to_par_n, to_par_d;
|
|
gint w = 0, h = 0;
|
|
gint from_dar_n, from_dar_d;
|
|
gint num, den;
|
|
|
|
/* from_par should be fixed */
|
|
g_return_val_if_fail (gst_value_is_fixed (from_par), othercaps);
|
|
|
|
from_par_n = gst_value_get_fraction_numerator (from_par);
|
|
from_par_d = gst_value_get_fraction_denominator (from_par);
|
|
|
|
gst_structure_get_int (ins, "width", &from_w);
|
|
gst_structure_get_int (ins, "height", &from_h);
|
|
|
|
gst_structure_get_int (outs, "width", &w);
|
|
gst_structure_get_int (outs, "height", &h);
|
|
|
|
/* if both width and height are already fixed, we can't do anything
|
|
* about it anymore */
|
|
if (w && h) {
|
|
guint n, d;
|
|
|
|
GST_DEBUG_OBJECT (trans, "dimensions already set to %dx%d, not fixating",
|
|
w, h);
|
|
if (!gst_value_is_fixed (to_par)) {
|
|
if (gst_video_calculate_display_ratio (&n, &d, from_w, from_h,
|
|
from_par_n, from_par_d, w, h)) {
|
|
GST_DEBUG_OBJECT (trans, "fixating to_par to %dx%d", n, d);
|
|
if (gst_structure_has_field (outs, "pixel-aspect-ratio"))
|
|
gst_structure_fixate_field_nearest_fraction (outs,
|
|
"pixel-aspect-ratio", n, d);
|
|
else if (n != d)
|
|
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
|
|
n, d, NULL);
|
|
}
|
|
}
|
|
goto done;
|
|
}
|
|
|
|
/* Calculate input DAR */
|
|
if (!gst_util_fraction_multiply (from_w, from_h, from_par_n, from_par_d,
|
|
&from_dar_n, &from_dar_d)) {
|
|
GST_ELEMENT_ERROR (trans, CORE, NEGOTIATION, (NULL),
|
|
("Error calculating the output scaled size - integer overflow"));
|
|
goto done;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (trans, "Input DAR is %d/%d", from_dar_n, from_dar_d);
|
|
|
|
/* If either width or height are fixed there's not much we
|
|
* can do either except choosing a height or width and PAR
|
|
* that matches the DAR as good as possible
|
|
*/
|
|
if (h) {
|
|
GstStructure *tmp;
|
|
gint set_w, set_par_n, set_par_d;
|
|
|
|
GST_DEBUG_OBJECT (trans, "height is fixed (%d)", h);
|
|
|
|
/* If the PAR is fixed too, there's not much to do
|
|
* except choosing the width that is nearest to the
|
|
* width with the same DAR */
|
|
if (gst_value_is_fixed (to_par)) {
|
|
to_par_n = gst_value_get_fraction_numerator (to_par);
|
|
to_par_d = gst_value_get_fraction_denominator (to_par);
|
|
|
|
GST_DEBUG_OBJECT (trans, "PAR is fixed %d/%d", to_par_n, to_par_d);
|
|
|
|
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, to_par_d,
|
|
to_par_n, &num, &den)) {
|
|
GST_ELEMENT_ERROR (trans, CORE, NEGOTIATION, (NULL),
|
|
("Error calculating the output scaled size - integer overflow"));
|
|
goto done;
|
|
}
|
|
|
|
w = (guint) gst_util_uint64_scale_int (h, num, den);
|
|
gst_structure_fixate_field_nearest_int (outs, "width", w);
|
|
|
|
goto done;
|
|
}
|
|
|
|
/* The PAR is not fixed and it's quite likely that we can set
|
|
* an arbitrary PAR. */
|
|
|
|
/* Check if we can keep the input width */
|
|
tmp = gst_structure_copy (outs);
|
|
gst_structure_fixate_field_nearest_int (tmp, "width", from_w);
|
|
gst_structure_get_int (tmp, "width", &set_w);
|
|
|
|
/* Might have failed but try to keep the DAR nonetheless by
|
|
* adjusting the PAR */
|
|
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, h, set_w,
|
|
&to_par_n, &to_par_d)) {
|
|
GST_ELEMENT_ERROR (trans, CORE, NEGOTIATION, (NULL),
|
|
("Error calculating the output scaled size - integer overflow"));
|
|
gst_structure_free (tmp);
|
|
goto done;
|
|
}
|
|
|
|
if (!gst_structure_has_field (tmp, "pixel-aspect-ratio"))
|
|
gst_structure_set_value (tmp, "pixel-aspect-ratio", to_par);
|
|
gst_structure_fixate_field_nearest_fraction (tmp, "pixel-aspect-ratio",
|
|
to_par_n, to_par_d);
|
|
gst_structure_get_fraction (tmp, "pixel-aspect-ratio", &set_par_n,
|
|
&set_par_d);
|
|
gst_structure_free (tmp);
|
|
|
|
/* Check if the adjusted PAR is accepted */
|
|
if (set_par_n == to_par_n && set_par_d == to_par_d) {
|
|
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
|
|
set_par_n != set_par_d)
|
|
gst_structure_set (outs, "width", G_TYPE_INT, set_w,
|
|
"pixel-aspect-ratio", GST_TYPE_FRACTION, set_par_n, set_par_d,
|
|
NULL);
|
|
goto done;
|
|
}
|
|
|
|
/* Otherwise scale the width to the new PAR and check if the
|
|
* adjusted with is accepted. If all that fails we can't keep
|
|
* the DAR */
|
|
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_par_d,
|
|
set_par_n, &num, &den)) {
|
|
GST_ELEMENT_ERROR (trans, CORE, NEGOTIATION, (NULL),
|
|
("Error calculating the output scaled size - integer overflow"));
|
|
goto done;
|
|
}
|
|
|
|
w = (guint) gst_util_uint64_scale_int (h, num, den);
|
|
gst_structure_fixate_field_nearest_int (outs, "width", w);
|
|
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
|
|
set_par_n != set_par_d)
|
|
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
|
|
set_par_n, set_par_d, NULL);
|
|
|
|
goto done;
|
|
} else if (w) {
|
|
GstStructure *tmp;
|
|
gint set_h, set_par_n, set_par_d;
|
|
|
|
GST_DEBUG_OBJECT (trans, "width is fixed (%d)", w);
|
|
|
|
/* If the PAR is fixed too, there's not much to do
|
|
* except choosing the height that is nearest to the
|
|
* height with the same DAR */
|
|
if (gst_value_is_fixed (to_par)) {
|
|
to_par_n = gst_value_get_fraction_numerator (to_par);
|
|
to_par_d = gst_value_get_fraction_denominator (to_par);
|
|
|
|
GST_DEBUG_OBJECT (trans, "PAR is fixed %d/%d", to_par_n, to_par_d);
|
|
|
|
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, to_par_d,
|
|
to_par_n, &num, &den)) {
|
|
GST_ELEMENT_ERROR (trans, CORE, NEGOTIATION, (NULL),
|
|
("Error calculating the output scaled size - integer overflow"));
|
|
goto done;
|
|
}
|
|
|
|
h = (guint) gst_util_uint64_scale_int (w, den, num);
|
|
gst_structure_fixate_field_nearest_int (outs, "height", h);
|
|
|
|
goto done;
|
|
}
|
|
|
|
/* The PAR is not fixed and it's quite likely that we can set
|
|
* an arbitrary PAR. */
|
|
|
|
/* Check if we can keep the input height */
|
|
tmp = gst_structure_copy (outs);
|
|
gst_structure_fixate_field_nearest_int (tmp, "height", from_h);
|
|
gst_structure_get_int (tmp, "height", &set_h);
|
|
|
|
/* Might have failed but try to keep the DAR nonetheless by
|
|
* adjusting the PAR */
|
|
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_h, w,
|
|
&to_par_n, &to_par_d)) {
|
|
GST_ELEMENT_ERROR (trans, CORE, NEGOTIATION, (NULL),
|
|
("Error calculating the output scaled size - integer overflow"));
|
|
gst_structure_free (tmp);
|
|
goto done;
|
|
}
|
|
if (!gst_structure_has_field (tmp, "pixel-aspect-ratio"))
|
|
gst_structure_set_value (tmp, "pixel-aspect-ratio", to_par);
|
|
gst_structure_fixate_field_nearest_fraction (tmp, "pixel-aspect-ratio",
|
|
to_par_n, to_par_d);
|
|
gst_structure_get_fraction (tmp, "pixel-aspect-ratio", &set_par_n,
|
|
&set_par_d);
|
|
gst_structure_free (tmp);
|
|
|
|
/* Check if the adjusted PAR is accepted */
|
|
if (set_par_n == to_par_n && set_par_d == to_par_d) {
|
|
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
|
|
set_par_n != set_par_d)
|
|
gst_structure_set (outs, "height", G_TYPE_INT, set_h,
|
|
"pixel-aspect-ratio", GST_TYPE_FRACTION, set_par_n, set_par_d,
|
|
NULL);
|
|
goto done;
|
|
}
|
|
|
|
/* Otherwise scale the height to the new PAR and check if the
|
|
* adjusted with is accepted. If all that fails we can't keep
|
|
* the DAR */
|
|
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_par_d,
|
|
set_par_n, &num, &den)) {
|
|
GST_ELEMENT_ERROR (trans, CORE, NEGOTIATION, (NULL),
|
|
("Error calculating the output scaled size - integer overflow"));
|
|
goto done;
|
|
}
|
|
|
|
h = (guint) gst_util_uint64_scale_int (w, den, num);
|
|
gst_structure_fixate_field_nearest_int (outs, "height", h);
|
|
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
|
|
set_par_n != set_par_d)
|
|
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
|
|
set_par_n, set_par_d, NULL);
|
|
|
|
goto done;
|
|
} else if (gst_value_is_fixed (to_par)) {
|
|
GstStructure *tmp;
|
|
gint set_h, set_w, f_h, f_w;
|
|
|
|
to_par_n = gst_value_get_fraction_numerator (to_par);
|
|
to_par_d = gst_value_get_fraction_denominator (to_par);
|
|
|
|
GST_DEBUG_OBJECT (trans, "PAR is fixed %d/%d", to_par_n, to_par_d);
|
|
|
|
/* Calculate scale factor for the PAR change */
|
|
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, to_par_d,
|
|
to_par_n, &num, &den)) {
|
|
GST_ELEMENT_ERROR (trans, CORE, NEGOTIATION, (NULL),
|
|
("Error calculating the output scaled size - integer overflow"));
|
|
goto done;
|
|
}
|
|
|
|
/* Try to keep the input height (because of interlacing) */
|
|
tmp = gst_structure_copy (outs);
|
|
gst_structure_fixate_field_nearest_int (tmp, "height", from_h);
|
|
gst_structure_get_int (tmp, "height", &set_h);
|
|
|
|
/* This might have failed but try to scale the width
|
|
* to keep the DAR nonetheless */
|
|
w = (guint) gst_util_uint64_scale_int (set_h, num, den);
|
|
gst_structure_fixate_field_nearest_int (tmp, "width", w);
|
|
gst_structure_get_int (tmp, "width", &set_w);
|
|
gst_structure_free (tmp);
|
|
|
|
/* We kept the DAR and the height is nearest to the original height */
|
|
if (set_w == w) {
|
|
gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height",
|
|
G_TYPE_INT, set_h, NULL);
|
|
goto done;
|
|
}
|
|
|
|
f_h = set_h;
|
|
f_w = set_w;
|
|
|
|
/* If the former failed, try to keep the input width at least */
|
|
tmp = gst_structure_copy (outs);
|
|
gst_structure_fixate_field_nearest_int (tmp, "width", from_w);
|
|
gst_structure_get_int (tmp, "width", &set_w);
|
|
|
|
/* This might have failed but try to scale the width
|
|
* to keep the DAR nonetheless */
|
|
h = (guint) gst_util_uint64_scale_int (set_w, den, num);
|
|
gst_structure_fixate_field_nearest_int (tmp, "height", h);
|
|
gst_structure_get_int (tmp, "height", &set_h);
|
|
gst_structure_free (tmp);
|
|
|
|
/* We kept the DAR and the width is nearest to the original width */
|
|
if (set_h == h) {
|
|
gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height",
|
|
G_TYPE_INT, set_h, NULL);
|
|
goto done;
|
|
}
|
|
|
|
/* If all this failed, keep the height that was nearest to the original
|
|
* height and the nearest possible width. This changes the DAR but
|
|
* there's not much else to do here.
|
|
*/
|
|
gst_structure_set (outs, "width", G_TYPE_INT, f_w, "height", G_TYPE_INT,
|
|
f_h, NULL);
|
|
goto done;
|
|
} else {
|
|
GstStructure *tmp;
|
|
gint set_h, set_w, set_par_n, set_par_d, tmp2;
|
|
|
|
/* width, height and PAR are not fixed but passthrough is not possible */
|
|
|
|
/* First try to keep the height and width as good as possible
|
|
* and scale PAR */
|
|
tmp = gst_structure_copy (outs);
|
|
gst_structure_fixate_field_nearest_int (tmp, "height", from_h);
|
|
gst_structure_get_int (tmp, "height", &set_h);
|
|
gst_structure_fixate_field_nearest_int (tmp, "width", from_w);
|
|
gst_structure_get_int (tmp, "width", &set_w);
|
|
|
|
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_h, set_w,
|
|
&to_par_n, &to_par_d)) {
|
|
GST_ELEMENT_ERROR (trans, CORE, NEGOTIATION, (NULL),
|
|
("Error calculating the output scaled size - integer overflow"));
|
|
gst_structure_free (tmp);
|
|
goto done;
|
|
}
|
|
|
|
if (!gst_structure_has_field (tmp, "pixel-aspect-ratio"))
|
|
gst_structure_set_value (tmp, "pixel-aspect-ratio", to_par);
|
|
gst_structure_fixate_field_nearest_fraction (tmp, "pixel-aspect-ratio",
|
|
to_par_n, to_par_d);
|
|
gst_structure_get_fraction (tmp, "pixel-aspect-ratio", &set_par_n,
|
|
&set_par_d);
|
|
gst_structure_free (tmp);
|
|
|
|
if (set_par_n == to_par_n && set_par_d == to_par_d) {
|
|
gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height",
|
|
G_TYPE_INT, set_h, NULL);
|
|
|
|
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
|
|
set_par_n != set_par_d)
|
|
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
|
|
set_par_n, set_par_d, NULL);
|
|
goto done;
|
|
}
|
|
|
|
/* Otherwise try to scale width to keep the DAR with the set
|
|
* PAR and height */
|
|
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_par_d,
|
|
set_par_n, &num, &den)) {
|
|
GST_ELEMENT_ERROR (trans, CORE, NEGOTIATION, (NULL),
|
|
("Error calculating the output scaled size - integer overflow"));
|
|
goto done;
|
|
}
|
|
|
|
w = (guint) gst_util_uint64_scale_int (set_h, num, den);
|
|
tmp = gst_structure_copy (outs);
|
|
gst_structure_fixate_field_nearest_int (tmp, "width", w);
|
|
gst_structure_get_int (tmp, "width", &tmp2);
|
|
gst_structure_free (tmp);
|
|
|
|
if (tmp2 == w) {
|
|
gst_structure_set (outs, "width", G_TYPE_INT, tmp2, "height",
|
|
G_TYPE_INT, set_h, NULL);
|
|
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
|
|
set_par_n != set_par_d)
|
|
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
|
|
set_par_n, set_par_d, NULL);
|
|
goto done;
|
|
}
|
|
|
|
/* ... or try the same with the height */
|
|
h = (guint) gst_util_uint64_scale_int (set_w, den, num);
|
|
tmp = gst_structure_copy (outs);
|
|
gst_structure_fixate_field_nearest_int (tmp, "height", h);
|
|
gst_structure_get_int (tmp, "height", &tmp2);
|
|
gst_structure_free (tmp);
|
|
|
|
if (tmp2 == h) {
|
|
gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height",
|
|
G_TYPE_INT, tmp2, NULL);
|
|
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
|
|
set_par_n != set_par_d)
|
|
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
|
|
set_par_n, set_par_d, NULL);
|
|
goto done;
|
|
}
|
|
|
|
/* If all fails we can't keep the DAR and take the nearest values
|
|
* for everything from the first try */
|
|
gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height",
|
|
G_TYPE_INT, set_h, NULL);
|
|
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
|
|
set_par_n != set_par_d)
|
|
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
|
|
set_par_n, set_par_d, NULL);
|
|
}
|
|
}
|
|
|
|
done:
|
|
GST_DEBUG_OBJECT (trans, "fixated othercaps to %" GST_PTR_FORMAT, othercaps);
|
|
|
|
if (from_par == &fpar)
|
|
g_value_unset (&fpar);
|
|
if (to_par == &tpar)
|
|
g_value_unset (&tpar);
|
|
|
|
/* fixate remaining fields */
|
|
othercaps = gst_caps_fixate (othercaps);
|
|
|
|
if (direction == GST_PAD_SINK) {
|
|
if (gst_caps_is_subset (caps, othercaps)) {
|
|
gst_caps_replace (&othercaps, caps);
|
|
}
|
|
}
|
|
|
|
return othercaps;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_v4l2_transform_prepare_output_buffer (GstBaseTransform * trans,
|
|
GstBuffer * inbuf, GstBuffer ** outbuf)
|
|
{
|
|
GstV4l2Transform *self = GST_V4L2_TRANSFORM (trans);
|
|
GstBufferPool *pool = gst_v4l2_object_get_buffer_pool (self->v4l2output);
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GstBaseTransformClass *bclass = GST_BASE_TRANSFORM_CLASS (parent_class);
|
|
|
|
if (gst_base_transform_is_passthrough (trans)) {
|
|
GST_DEBUG_OBJECT (self, "Passthrough, no need to do anything");
|
|
*outbuf = inbuf;
|
|
goto beach;
|
|
}
|
|
|
|
/* Ensure input internal pool is active */
|
|
if (!gst_buffer_pool_is_active (pool)) {
|
|
GstStructure *config = gst_buffer_pool_get_config (pool);
|
|
gint min = MAX (GST_V4L2_MIN_BUFFERS (self->v4l2output),
|
|
self->v4l2output->min_buffers);
|
|
|
|
if (self->v4l2output->mode == GST_V4L2_IO_USERPTR ||
|
|
self->v4l2output->mode == GST_V4L2_IO_DMABUF_IMPORT) {
|
|
if (!gst_v4l2_object_try_import (self->v4l2output, inbuf)) {
|
|
GST_ERROR_OBJECT (self, "cannot import buffers from upstream");
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
if (self->v4l2output->need_video_meta) {
|
|
/* We may need video meta if imported buffer is using non-standard
|
|
* stride/padding */
|
|
gst_buffer_pool_config_add_option (config,
|
|
GST_BUFFER_POOL_OPTION_VIDEO_META);
|
|
}
|
|
}
|
|
|
|
gst_buffer_pool_config_set_params (config, self->incaps,
|
|
self->v4l2output->info.size, min, min);
|
|
|
|
/* There is no reason to refuse this config */
|
|
if (!gst_buffer_pool_set_config (pool, config))
|
|
goto activate_failed;
|
|
|
|
if (!gst_buffer_pool_set_active (pool, TRUE))
|
|
goto activate_failed;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (self, "Queue input buffer");
|
|
ret =
|
|
gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL (pool), &inbuf, NULL);
|
|
if (G_UNLIKELY (ret != GST_FLOW_OK))
|
|
goto beach;
|
|
|
|
do {
|
|
if (pool)
|
|
g_object_unref (pool);
|
|
pool = gst_base_transform_get_buffer_pool (trans);
|
|
|
|
if (!gst_buffer_pool_set_active (pool, TRUE))
|
|
goto activate_failed;
|
|
|
|
GST_DEBUG_OBJECT (self, "Dequeue output buffer");
|
|
ret = gst_buffer_pool_acquire_buffer (pool, outbuf, NULL);
|
|
g_object_unref (pool);
|
|
|
|
if (ret != GST_FLOW_OK)
|
|
goto alloc_failed;
|
|
|
|
pool = gst_v4l2_object_get_buffer_pool (self->v4l2capture);
|
|
ret =
|
|
gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL (pool), outbuf,
|
|
NULL);
|
|
|
|
} while (ret == GST_V4L2_FLOW_CORRUPTED_BUFFER);
|
|
|
|
if (ret != GST_FLOW_OK) {
|
|
gst_buffer_unref (*outbuf);
|
|
*outbuf = NULL;
|
|
}
|
|
|
|
if (bclass->copy_metadata)
|
|
if (!bclass->copy_metadata (trans, inbuf, *outbuf)) {
|
|
/* something failed, post a warning */
|
|
GST_ELEMENT_WARNING (self, STREAM, NOT_IMPLEMENTED,
|
|
("could not copy metadata"), (NULL));
|
|
}
|
|
|
|
beach:
|
|
if (pool)
|
|
g_object_unref (pool);
|
|
return ret;
|
|
|
|
activate_failed:
|
|
GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
|
|
("failed to activate bufferpool"), ("failed to activate bufferpool"));
|
|
g_object_unref (pool);
|
|
return GST_FLOW_ERROR;
|
|
|
|
alloc_failed:
|
|
GST_DEBUG_OBJECT (self, "could not allocate buffer from pool");
|
|
return ret;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_v4l2_transform_transform (GstBaseTransform * trans, GstBuffer * inbuf,
|
|
GstBuffer * outbuf)
|
|
{
|
|
/* Nothing to do */
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static gboolean
|
|
gst_v4l2_transform_sink_event (GstBaseTransform * trans, GstEvent * event)
|
|
{
|
|
GstV4l2Transform *self = GST_V4L2_TRANSFORM (trans);
|
|
gboolean ret;
|
|
GstEventType type = GST_EVENT_TYPE (event);
|
|
|
|
/* Nothing to flush in passthrough */
|
|
if (gst_base_transform_is_passthrough (trans))
|
|
return GST_BASE_TRANSFORM_CLASS (parent_class)->sink_event (trans, event);
|
|
|
|
switch (type) {
|
|
case GST_EVENT_FLUSH_START:
|
|
GST_DEBUG_OBJECT (self, "flush start");
|
|
gst_v4l2_object_unlock (self->v4l2output);
|
|
gst_v4l2_object_unlock (self->v4l2capture);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = GST_BASE_TRANSFORM_CLASS (parent_class)->sink_event (trans, event);
|
|
|
|
switch (type) {
|
|
case GST_EVENT_FLUSH_STOP:
|
|
/* Buffer should be back now */
|
|
GST_DEBUG_OBJECT (self, "flush stop");
|
|
gst_v4l2_object_unlock_stop (self->v4l2capture);
|
|
gst_v4l2_object_unlock_stop (self->v4l2output);
|
|
gst_v4l2_buffer_pool_flush (self->v4l2output);
|
|
gst_v4l2_buffer_pool_flush (self->v4l2capture);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_v4l2_transform_change_state (GstElement * element,
|
|
GstStateChange transition)
|
|
{
|
|
GstV4l2Transform *self = GST_V4L2_TRANSFORM (element);
|
|
GstStateChangeReturn ret;
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_NULL_TO_READY:
|
|
if (!gst_v4l2_transform_open (self))
|
|
return GST_STATE_CHANGE_FAILURE;
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
gst_v4l2_object_unlock (self->v4l2output);
|
|
gst_v4l2_object_unlock (self->v4l2capture);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
gst_v4l2_transform_close (self);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_transform_dispose (GObject * object)
|
|
{
|
|
GstV4l2Transform *self = GST_V4L2_TRANSFORM (object);
|
|
|
|
gst_caps_replace (&self->probed_sinkcaps, NULL);
|
|
gst_caps_replace (&self->probed_srccaps, NULL);
|
|
|
|
G_OBJECT_CLASS (parent_class)->dispose (object);
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_transform_finalize (GObject * object)
|
|
{
|
|
GstV4l2Transform *self = GST_V4L2_TRANSFORM (object);
|
|
|
|
gst_v4l2_object_destroy (self->v4l2capture);
|
|
gst_v4l2_object_destroy (self->v4l2output);
|
|
|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_transform_init (GstV4l2Transform * self)
|
|
{
|
|
/* V4L2 object are created in subinstance_init */
|
|
/* enable QoS */
|
|
gst_base_transform_set_qos_enabled (GST_BASE_TRANSFORM (self), TRUE);
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_transform_subinstance_init (GTypeInstance * instance, gpointer g_class)
|
|
{
|
|
GstV4l2TransformClass *klass = GST_V4L2_TRANSFORM_CLASS (g_class);
|
|
GstV4l2Transform *self = GST_V4L2_TRANSFORM (instance);
|
|
|
|
self->v4l2output = gst_v4l2_object_new (GST_ELEMENT (self),
|
|
GST_OBJECT (GST_BASE_TRANSFORM_SINK_PAD (self)),
|
|
V4L2_BUF_TYPE_VIDEO_OUTPUT, klass->default_device,
|
|
gst_v4l2_get_output, gst_v4l2_set_output, NULL);
|
|
self->v4l2output->no_initial_format = TRUE;
|
|
self->v4l2output->keep_aspect = FALSE;
|
|
|
|
self->v4l2capture = gst_v4l2_object_new (GST_ELEMENT (self),
|
|
GST_OBJECT (GST_BASE_TRANSFORM_SRC_PAD (self)),
|
|
V4L2_BUF_TYPE_VIDEO_CAPTURE, klass->default_device,
|
|
gst_v4l2_get_input, gst_v4l2_set_input, NULL);
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_transform_class_init (GstV4l2TransformClass * klass)
|
|
{
|
|
GstElementClass *element_class;
|
|
GObjectClass *gobject_class;
|
|
GstBaseTransformClass *base_transform_class;
|
|
|
|
element_class = (GstElementClass *) klass;
|
|
gobject_class = (GObjectClass *) klass;
|
|
base_transform_class = (GstBaseTransformClass *) klass;
|
|
|
|
GST_DEBUG_CATEGORY_INIT (gst_v4l2_transform_debug, "v4l2transform", 0,
|
|
"V4L2 Converter");
|
|
|
|
gst_element_class_set_static_metadata (element_class,
|
|
"V4L2 Video Converter",
|
|
"Filter/Converter/Video/Scaler",
|
|
"Transform streams via V4L2 API",
|
|
"Nicolas Dufresne <nicolas.dufresne@collabora.com>");
|
|
|
|
gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_v4l2_transform_dispose);
|
|
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_v4l2_transform_finalize);
|
|
gobject_class->set_property =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_transform_set_property);
|
|
gobject_class->get_property =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_transform_get_property);
|
|
|
|
base_transform_class->stop = GST_DEBUG_FUNCPTR (gst_v4l2_transform_stop);
|
|
base_transform_class->set_caps =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_transform_set_caps);
|
|
base_transform_class->query = GST_DEBUG_FUNCPTR (gst_v4l2_transform_query);
|
|
base_transform_class->sink_event =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_transform_sink_event);
|
|
base_transform_class->decide_allocation =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_transform_decide_allocation);
|
|
base_transform_class->propose_allocation =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_transform_propose_allocation);
|
|
base_transform_class->transform_caps =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_transform_transform_caps);
|
|
base_transform_class->fixate_caps =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_transform_fixate_caps);
|
|
base_transform_class->prepare_output_buffer =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_transform_prepare_output_buffer);
|
|
base_transform_class->transform =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_transform_transform);
|
|
|
|
base_transform_class->passthrough_on_same_caps = TRUE;
|
|
|
|
element_class->change_state =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_transform_change_state);
|
|
|
|
gst_v4l2_object_install_m2m_properties_helper (gobject_class);
|
|
|
|
g_object_class_install_property (gobject_class, PROP_DISABLE_PASSTHROUGH,
|
|
g_param_spec_boolean ("disable-passthrough", "Disable Passthrough",
|
|
"Forces passing buffers through the converter", FALSE,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_transform_subclass_init (gpointer g_class, gpointer data)
|
|
{
|
|
GstV4l2TransformClass *klass = GST_V4L2_TRANSFORM_CLASS (g_class);
|
|
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
|
|
GstV4l2TransformCData *cdata = data;
|
|
|
|
klass->default_device = cdata->device;
|
|
|
|
gst_element_class_add_pad_template (element_class,
|
|
gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
|
|
cdata->sink_caps));
|
|
gst_element_class_add_pad_template (element_class,
|
|
gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
|
|
cdata->src_caps));
|
|
|
|
gst_caps_unref (cdata->sink_caps);
|
|
gst_caps_unref (cdata->src_caps);
|
|
g_free (cdata);
|
|
}
|
|
|
|
/* Probing functions */
|
|
gboolean
|
|
gst_v4l2_is_transform (GstCaps * sink_caps, GstCaps * src_caps)
|
|
{
|
|
gboolean ret = FALSE;
|
|
|
|
if (gst_caps_is_subset (sink_caps, gst_v4l2_object_get_raw_caps ())
|
|
&& gst_caps_is_subset (src_caps, gst_v4l2_object_get_raw_caps ()))
|
|
ret = TRUE;
|
|
|
|
return ret;
|
|
}
|
|
|
|
void
|
|
gst_v4l2_transform_register (GstPlugin * plugin, const gchar * basename,
|
|
const gchar * device_path, GstCaps * sink_caps, GstCaps * src_caps)
|
|
{
|
|
GTypeQuery type_query;
|
|
GTypeInfo type_info = { 0, };
|
|
GType type, subtype;
|
|
gchar *type_name;
|
|
GstV4l2TransformCData *cdata;
|
|
|
|
cdata = g_new0 (GstV4l2TransformCData, 1);
|
|
cdata->device = g_strdup (device_path);
|
|
cdata->sink_caps = gst_caps_ref (sink_caps);
|
|
cdata->src_caps = gst_caps_ref (src_caps);
|
|
|
|
type = gst_v4l2_transform_get_type ();
|
|
g_type_query (type, &type_query);
|
|
memset (&type_info, 0, sizeof (type_info));
|
|
type_info.class_size = type_query.class_size;
|
|
type_info.instance_size = type_query.instance_size;
|
|
type_info.class_init = gst_v4l2_transform_subclass_init;
|
|
type_info.class_data = cdata;
|
|
type_info.instance_init = gst_v4l2_transform_subinstance_init;
|
|
|
|
if (g_type_from_name ("v4l2convert") != 0)
|
|
type_name = g_strdup_printf ("v4l2%sconvert", basename);
|
|
else
|
|
type_name = g_strdup ("v4l2convert");
|
|
subtype = g_type_register_static (type, type_name, &type_info, 0);
|
|
|
|
if (!gst_element_register (plugin, type_name, GST_RANK_NONE, subtype))
|
|
GST_WARNING ("Failed to register plugin '%s'", type_name);
|
|
|
|
g_free (type_name);
|
|
}
|