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