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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <shaderc/shaderc.h>
#include "libavutil/mem.h"
#include "vulkan_spirv.h"
static int shdc_shader_compile(FFVkSPIRVCompiler *ctx, void *avctx,
FFVkSPIRVShader *shd, uint8_t **data,
size_t *size, const char *entrypoint,
void **opaque)
{
int loglevel, err, warn, ret;
const char *status, *message;
shaderc_compilation_result_t res;
static const char *shdc_result[] = {
[shaderc_compilation_status_success] = "success",
[shaderc_compilation_status_invalid_stage] = "invalid stage",
[shaderc_compilation_status_compilation_error] = "error",
[shaderc_compilation_status_internal_error] = "internal error",
[shaderc_compilation_status_null_result_object] = "no result",
[shaderc_compilation_status_invalid_assembly] = "invalid assembly",
};
static const shaderc_shader_kind shdc_kind[] = {
[VK_SHADER_STAGE_VERTEX_BIT] = shaderc_glsl_vertex_shader,
[VK_SHADER_STAGE_FRAGMENT_BIT] = shaderc_glsl_fragment_shader,
[VK_SHADER_STAGE_COMPUTE_BIT] = shaderc_glsl_compute_shader,
};
shaderc_compile_options_t opts = shaderc_compile_options_initialize();
*opaque = NULL;
if (!opts)
return AVERROR(ENOMEM);
shaderc_compile_options_set_target_env(opts, shaderc_target_env_vulkan,
shaderc_env_version_vulkan_1_2);
shaderc_compile_options_set_target_spirv(opts, shaderc_spirv_version_1_5);
shaderc_compile_options_set_optimization_level(opts,
shaderc_optimization_level_performance);
res = shaderc_compile_into_spv((shaderc_compiler_t)ctx->priv,
shd->src.str, strlen(shd->src.str),
shdc_kind[shd->shader.stage],
shd->name, entrypoint, opts);
shaderc_compile_options_release(opts);
ret = shaderc_result_get_compilation_status(res);
err = shaderc_result_get_num_errors(res);
warn = shaderc_result_get_num_warnings(res);
message = shaderc_result_get_error_message(res);
loglevel = err ? AV_LOG_ERROR : warn ? AV_LOG_WARNING : AV_LOG_VERBOSE;
ff_vk_shader_print(avctx, shd, loglevel);
if (message && (err || warn))
av_log(avctx, loglevel, "%s\n", message);
status = ret < FF_ARRAY_ELEMS(shdc_result) ? shdc_result[ret] : "unknown";
av_log(avctx, loglevel, "shaderc compile status '%s' (%d errors, %d warnings)\n",
status, err, warn);
if (err > 0)
return AVERROR(EINVAL);
*data = (uint8_t *)shaderc_result_get_bytes(res);
*size = shaderc_result_get_length(res);
*opaque = res;
return 0;
}
static void shdc_shader_free(FFVkSPIRVCompiler *ctx, void **opaque)
{
if (!opaque || !*opaque)
return;
shaderc_result_release((shaderc_compilation_result_t)*opaque);
*opaque = NULL;
}
static void shdc_uninit(FFVkSPIRVCompiler **ctx)
{
FFVkSPIRVCompiler *s;
if (!ctx || !*ctx)
return;
s = *ctx;
shaderc_compiler_release((shaderc_compiler_t)s->priv);
av_freep(ctx);
}
FFVkSPIRVCompiler *ff_vk_shaderc_init(void)
{
FFVkSPIRVCompiler *ret = av_mallocz(sizeof(*ret));
if (!ret)
return NULL;
ret->compile_shader = shdc_shader_compile;
ret->free_shader = shdc_shader_free;
ret->uninit = shdc_uninit;
ret->priv = (void *)shaderc_compiler_initialize();
if (!ret->priv)
av_freep(&ret);
return ret;
}
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