gstreamer/ext/vulkan/vkimageidentity.c

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/*
* GStreamer
* Copyright (C) 2019 Matthew Waters <matthew@centricular.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.
*/
/**
* SECTION:element-vulkanimageidentity
* @title: vulkanimgeidentity
*
* vulkanimageidentity produces a vulkan image that is a copy of the input image.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "vkimageidentity.h"
#include "shaders/identity.vert.h"
#include "shaders/identity.frag.h"
GST_DEBUG_CATEGORY (gst_debug_vulkan_image_identity);
#define GST_CAT_DEFAULT gst_debug_vulkan_image_identity
static gboolean gst_vulkan_image_identity_start (GstBaseTransform * bt);
static gboolean gst_vulkan_image_identity_stop (GstBaseTransform * bt);
static GstFlowReturn gst_vulkan_image_identity_transform (GstBaseTransform * bt,
GstBuffer * inbuf, GstBuffer * outbuf);
static gboolean gst_vulkan_image_identity_set_caps (GstBaseTransform * bt,
GstCaps * in_caps, GstCaps * out_caps);
#define IMAGE_FORMATS " { BGRA }"
static GstStaticPadTemplate gst_vulkan_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_VULKAN_IMAGE,
IMAGE_FORMATS)));
static GstStaticPadTemplate gst_vulkan_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_VULKAN_IMAGE,
IMAGE_FORMATS)));
enum
{
PROP_0,
};
enum
{
SIGNAL_0,
LAST_SIGNAL
};
/* static guint gst_vulkan_image_identity_signals[LAST_SIGNAL] = { 0 }; */
#define gst_vulkan_image_identity_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstVulkanImageIdentity, gst_vulkan_image_identity,
GST_TYPE_VULKAN_VIDEO_FILTER,
GST_DEBUG_CATEGORY_INIT (gst_debug_vulkan_image_identity,
"vulkanimageidentity", 0, "Vulkan Image identity"));
static void
gst_vulkan_image_identity_class_init (GstVulkanImageIdentityClass * klass)
{
GstElementClass *gstelement_class;
GstBaseTransformClass *gstbasetransform_class;
gstelement_class = (GstElementClass *) klass;
gstbasetransform_class = (GstBaseTransformClass *) klass;
gst_element_class_set_metadata (gstelement_class, "Vulkan Image Identity",
"Filter/Video", "A Vulkan image copier",
"Matthew Waters <matthew@centricular.com>");
gst_element_class_add_static_pad_template (gstelement_class,
&gst_vulkan_sink_template);
gst_element_class_add_static_pad_template (gstelement_class,
&gst_vulkan_src_template);
gstbasetransform_class->start =
GST_DEBUG_FUNCPTR (gst_vulkan_image_identity_start);
gstbasetransform_class->stop =
GST_DEBUG_FUNCPTR (gst_vulkan_image_identity_stop);
gstbasetransform_class->set_caps = gst_vulkan_image_identity_set_caps;
gstbasetransform_class->transform = gst_vulkan_image_identity_transform;
}
static void
gst_vulkan_image_identity_init (GstVulkanImageIdentity * vk_identity)
{
}
static gboolean
gst_vulkan_image_identity_set_caps (GstBaseTransform * bt, GstCaps * in_caps,
GstCaps * out_caps)
{
GstVulkanVideoFilter *vfilter = GST_VULKAN_VIDEO_FILTER (bt);
GstVulkanImageIdentity *vk_identity = GST_VULKAN_IMAGE_IDENTITY (bt);
if (!GST_BASE_TRANSFORM_CLASS (parent_class)->set_caps (bt, in_caps,
out_caps))
return FALSE;
if (!gst_vulkan_full_screen_quad_set_info (vk_identity->quad,
&vfilter->in_info, &vfilter->out_info))
return FALSE;
return TRUE;
}
static gboolean
gst_vulkan_image_identity_start (GstBaseTransform * bt)
{
GstVulkanImageIdentity *vk_identity = GST_VULKAN_IMAGE_IDENTITY (bt);
GstVulkanVideoFilter *vfilter = GST_VULKAN_VIDEO_FILTER (vk_identity);
GstVulkanHandle *vert, *frag;
GError *error = NULL;
if (!GST_BASE_TRANSFORM_CLASS (parent_class)->start (bt))
return FALSE;
vk_identity->quad = gst_vulkan_full_screen_quad_new (vfilter->queue);
if (!(vert = gst_vulkan_create_shader (vfilter->device, identity_vert,
identity_vert_size, &error)))
goto error;
if (!(frag = gst_vulkan_create_shader (vfilter->device, identity_frag,
identity_frag_size, &error))) {
gst_vulkan_handle_unref (vert);
goto error;
}
gst_vulkan_full_screen_quad_set_shaders (vk_identity->quad, vert, frag);
gst_vulkan_handle_unref (vert);
gst_vulkan_handle_unref (frag);
return TRUE;
error:
GST_ELEMENT_ERROR (bt, RESOURCE, NOT_FOUND, ("%s", error->message), (NULL));
return FALSE;
}
static gboolean
gst_vulkan_image_identity_stop (GstBaseTransform * bt)
{
GstVulkanImageIdentity *vk_identity = GST_VULKAN_IMAGE_IDENTITY (bt);
gst_clear_object (&vk_identity->quad);
return GST_BASE_TRANSFORM_CLASS (parent_class)->stop (bt);
}
static GstFlowReturn
gst_vulkan_image_identity_transform (GstBaseTransform * bt, GstBuffer * inbuf,
GstBuffer * outbuf)
{
GstVulkanImageIdentity *vk_identity = GST_VULKAN_IMAGE_IDENTITY (bt);
GError *error = NULL;
if (!gst_vulkan_full_screen_quad_set_input_buffer (vk_identity->quad, inbuf,
&error))
goto error;
if (!gst_vulkan_full_screen_quad_set_output_buffer (vk_identity->quad, outbuf,
&error))
goto error;
if (!gst_vulkan_full_screen_quad_draw (vk_identity->quad, &error))
goto error;
return GST_FLOW_OK;
error:
GST_ELEMENT_ERROR (bt, LIBRARY, FAILED, ("%s", error->message), (NULL));
g_clear_error (&error);
return GST_FLOW_ERROR;
}