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89 lines
2.5 KiB
C
89 lines
2.5 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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "vkshader.h"
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#define SPIRV_MAGIC_NUMBER_NE 0x07230203
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#define SPIRV_MAGIC_NUMBER_OE 0x03022307
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VkShaderModule
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_vk_create_shader (GstVulkanDevice * device, gchar * code, gsize size,
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GError ** error)
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{
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VkShaderModule ret;
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VkResult res;
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/* *INDENT-OFF* */
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VkShaderModuleCreateInfo info = {
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.sType = VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO,
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.pNext = NULL,
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.flags = 0,
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.codeSize = size,
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.pCode = (guint32 *) code
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};
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/* *INDENT-ON* */
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guint32 first_word;
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guint32 *new_code = NULL;
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g_return_val_if_fail (size >= 4, NULL);
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g_return_val_if_fail (size % 4 == 0, NULL);
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first_word = ((guint32 *) code)[0];
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g_return_val_if_fail (first_word == SPIRV_MAGIC_NUMBER_NE
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|| first_word == SPIRV_MAGIC_NUMBER_OE, NULL);
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if (first_word == SPIRV_MAGIC_NUMBER_OE) {
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/* endianness swap... */
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guint32 *old_code = (guint32 *) code;
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gsize i;
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GST_DEBUG ("performaing endianness conversion on spirv shader of size %"
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G_GSIZE_FORMAT, size);
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new_code = g_new0 (guint32, size / 4);
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for (i = 0; i < size / 4; i++) {
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guint32 old = old_code[i];
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guint32 new = 0;
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new |= (old & 0xff) << 24;
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new |= (old & 0xff00) << 8;
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new |= (old & 0xff0000) >> 8;
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new |= (old & 0xff000000) >> 24;
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new_code[i] = new;
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}
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first_word = ((guint32 *) new_code)[0];
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g_assert (first_word == SPIRV_MAGIC_NUMBER_NE);
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info.pCode = new_code;
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}
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res = vkCreateShaderModule (device->device, &info, NULL, &ret);
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g_free (new_code);
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if (gst_vulkan_error_to_g_error (res, error, "VkCreateShaderModule") < 0)
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return NULL;
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g_free (new_code);
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return ret;
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}
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