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/*
* Copyright (c) 2018 Sergey Lavrushkin
*
* 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
*/
/**
* @file
* Implements DNN module initialization with specified backend.
*/
#include "../dnn_interface.h"
#include "libavutil/avassert.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavfilter/filters.h"
extern const DNNModule ff_dnn_backend_openvino;
extern const DNNModule ff_dnn_backend_tf;
extern const DNNModule ff_dnn_backend_torch;
#define OFFSET(x) offsetof(DnnContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM
static const AVOption dnn_base_options[] = {
{"model", "path to model file",
OFFSET(model_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS},
{"input", "input name of the model",
OFFSET(model_inputname), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS},
{"output", "output name of the model",
OFFSET(model_outputnames_string), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS},
{"backend_configs", "backend configs (deprecated)",
OFFSET(backend_options), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS | AV_OPT_FLAG_DEPRECATED},
{"options", "backend configs (deprecated)",
OFFSET(backend_options), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS | AV_OPT_FLAG_DEPRECATED},
{"nireq", "number of request",
OFFSET(nireq), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS},
{"async", "use DNN async inference",
OFFSET(async), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS},
{"device", "device to run model",
OFFSET(device), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS},
{NULL}
};
AVFILTER_DEFINE_CLASS(dnn_base);
typedef struct DnnBackendInfo {
const size_t offset;
union {
const AVClass *class;
const DNNModule *module;
};
} DnnBackendInfo;
static const DnnBackendInfo dnn_backend_info_list[] = {
{0, .class = &dnn_base_class},
// Must keep the same order as in DNNOptions, so offset value in incremental order
#if CONFIG_LIBTENSORFLOW
{offsetof(DnnContext, tf_option), .module = &ff_dnn_backend_tf},
#endif
#if CONFIG_LIBOPENVINO
{offsetof(DnnContext, ov_option), .module = &ff_dnn_backend_openvino},
#endif
#if CONFIG_LIBTORCH
{offsetof(DnnContext, torch_option), .module = &ff_dnn_backend_torch},
#endif
};
const DNNModule *ff_get_dnn_module(DNNBackendType backend_type, void *log_ctx)
{
for (int i = 1; i < FF_ARRAY_ELEMS(dnn_backend_info_list); i++) {
if (dnn_backend_info_list[i].module->type == backend_type)
return dnn_backend_info_list[i].module;
}
av_log(log_ctx, AV_LOG_ERROR,
"Module backend_type %d is not supported or enabled.\n",
backend_type);
return NULL;
}
void ff_dnn_init_child_class(DnnContext *ctx)
{
for (int i = 0; i < FF_ARRAY_ELEMS(dnn_backend_info_list); i++) {
const AVClass **ptr = (const AVClass **) ((char *) ctx + dnn_backend_info_list[i].offset);
*ptr = dnn_backend_info_list[i].class;
// Set default values after the class pointer is set
av_opt_set_defaults(ptr);
}
}
void *ff_dnn_child_next(DnnContext *obj, void *prev) {
size_t pre_offset;
if (!prev) {
av_assert0(obj->clazz);
return obj;
}
pre_offset = (char *)prev - (char *)obj;
for (int i = 0; i < FF_ARRAY_ELEMS(dnn_backend_info_list) - 1; i++) {
if (dnn_backend_info_list[i].offset == pre_offset) {
const AVClass **ptr = (const AVClass **) ((char *) obj + dnn_backend_info_list[i + 1].offset);
av_assert0(*ptr);
return ptr;
}
}
return NULL;
}
const AVClass *ff_dnn_child_class_iterate_with_mask(void **iter, uint32_t backend_mask)
{
for (uintptr_t i = (uintptr_t)*iter; i < FF_ARRAY_ELEMS(dnn_backend_info_list); i++) {
if (i > 0) {
const DNNModule *module = dnn_backend_info_list[i].module;
if (!(module->type & backend_mask))
continue;
}
*iter = (void *)(i + 1);
return dnn_backend_info_list[i].class;
}
return NULL;
}
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