dnn: add backend options when load the model

different backend might need different options for a better performance,
so, add the parameter into dnn interface, as a preparation.

Signed-off-by: Guo, Yejun <yejun.guo@intel.com>

libavfilter/dnn/dnn_backend_native.c

@@ -115,7 +115,7 @@ static DNNReturnType set_input_output_native(void *model, DNNData *input, const
 // layers_num,layer_type,layer_parameterss,layer_type,layer_parameters...
 // For CONV layer: activation_function, input_num, output_num, kernel_size, kernel, biases
 // For DEPTH_TO_SPACE layer: block_size
-DNNModel *ff_dnn_load_model_native(const char *model_filename)
+DNNModel *ff_dnn_load_model_native(const char *model_filename, const char *options)
 {
     DNNModel *model = NULL;
     char header_expected[] = "FFMPEGDNNNATIVE";
@@ -245,6 +245,7 @@ DNNModel *ff_dnn_load_model_native(const char *model_filename)
 
     model->set_input_output = &set_input_output_native;
     model->get_input = &get_input_native;
+    model->options = options;
 
     return model;
 

libavfilter/dnn/dnn_backend_native.h

@@ -116,7 +116,7 @@ typedef struct ConvolutionalNetwork{
     uint32_t nb_output;
 } ConvolutionalNetwork;
 
-DNNModel *ff_dnn_load_model_native(const char *model_filename);
+DNNModel *ff_dnn_load_model_native(const char *model_filename, const char *options);
 
 DNNReturnType ff_dnn_execute_model_native(const DNNModel *model, DNNData *outputs, uint32_t nb_output);
 

libavfilter/dnn/dnn_backend_openvino.c

@@ -155,7 +155,7 @@ err:
     return DNN_ERROR;
 }
 
-DNNModel *ff_dnn_load_model_ov(const char *model_filename)
+DNNModel *ff_dnn_load_model_ov(const char *model_filename, const char *options)
 {
     DNNModel *model = NULL;
     OVModel *ov_model = NULL;
@@ -186,6 +186,7 @@ DNNModel *ff_dnn_load_model_ov(const char *model_filename)
     model->model = (void *)ov_model;
     model->set_input_output = &set_input_output_ov;
     model->get_input = &get_input_ov;
+    model->options = options;
 
     return model;
 

libavfilter/dnn/dnn_backend_openvino.h

@@ -29,7 +29,7 @@
 
 #include "../dnn_interface.h"
 
-DNNModel *ff_dnn_load_model_ov(const char *model_filename);
+DNNModel *ff_dnn_load_model_ov(const char *model_filename, const char *options);
 
 DNNReturnType ff_dnn_execute_model_ov(const DNNModel *model, DNNData *outputs, uint32_t nb_output);
 

libavfilter/dnn/dnn_backend_tf.c

@@ -572,7 +572,7 @@ static DNNReturnType load_native_model(TFModel *tf_model, const char *model_file
     return DNN_SUCCESS;
 }
 
-DNNModel *ff_dnn_load_model_tf(const char *model_filename)
+DNNModel *ff_dnn_load_model_tf(const char *model_filename, const char *options)
 {
     DNNModel *model = NULL;
     TFModel *tf_model = NULL;
@@ -600,6 +600,7 @@ DNNModel *ff_dnn_load_model_tf(const char *model_filename)
     model->model = (void *)tf_model;
     model->set_input_output = &set_input_output_tf;
     model->get_input = &get_input_tf;
+    model->options = options;
 
     return model;
 }

libavfilter/dnn/dnn_backend_tf.h

@@ -29,7 +29,7 @@
 
 #include "../dnn_interface.h"
 
-DNNModel *ff_dnn_load_model_tf(const char *model_filename);
+DNNModel *ff_dnn_load_model_tf(const char *model_filename, const char *options);
 
 DNNReturnType ff_dnn_execute_model_tf(const DNNModel *model, DNNData *outputs, uint32_t nb_output);
 

libavfilter/dnn_interface.h

@@ -43,6 +43,8 @@ typedef struct DNNData{
 typedef struct DNNModel{
     // Stores model that can be different for different backends.
     void *model;
+    // Stores options when the model is executed by the backend
+    const char *options;
     // Gets model input information
     // Just reuse struct DNNData here, actually the DNNData.data field is not needed.
     DNNReturnType (*get_input)(void *model, DNNData *input, const char *input_name);
@@ -54,7 +56,7 @@ typedef struct DNNModel{
 // Stores pointers to functions for loading, executing, freeing DNN models for one of the backends.
 typedef struct DNNModule{
     // Loads model and parameters from given file. Returns NULL if it is not possible.
-    DNNModel *(*load_model)(const char *model_filename);
+    DNNModel *(*load_model)(const char *model_filename, const char *options);
     // Executes model with specified input and output. Returns DNN_ERROR otherwise.
     DNNReturnType (*execute_model)(const DNNModel *model, DNNData *outputs, uint32_t nb_output);
     // Frees memory allocated for model.

libavfilter/vf_derain.c

@@ -161,7 +161,7 @@ static av_cold int init(AVFilterContext *ctx)
         return AVERROR(EINVAL);
     }
 
-    dr_context->model = (dr_context->dnn_module->load_model)(dr_context->model_filename);
+    dr_context->model = (dr_context->dnn_module->load_model)(dr_context->model_filename, NULL);
     if (!dr_context->model) {
         av_log(ctx, AV_LOG_ERROR, "could not load DNN model\n");
         return AVERROR(EINVAL);

libavfilter/vf_dnn_processing.c

@@ -41,6 +41,7 @@ typedef struct DnnProcessingContext {
     DNNBackendType backend_type;
     char *model_inputname;
     char *model_outputname;
+    char *backend_options;
 
     DNNModule *dnn_module;
     DNNModel *model;
@@ -69,6 +70,7 @@ static const AVOption dnn_processing_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_outputname), AV_OPT_TYPE_STRING,    { .str = NULL }, 0, 0, FLAGS },
+    { "options",     "backend options",            OFFSET(backend_options),  AV_OPT_TYPE_STRING,    { .str = NULL }, 0, 0, FLAGS },
     { NULL }
 };
 
@@ -101,7 +103,7 @@ static av_cold int init(AVFilterContext *context)
         return AVERROR(EINVAL);
     }
 
-    ctx->model = (ctx->dnn_module->load_model)(ctx->model_filename);
+    ctx->model = (ctx->dnn_module->load_model)(ctx->model_filename, ctx->backend_options);
     if (!ctx->model) {
         av_log(ctx, AV_LOG_ERROR, "could not load DNN model\n");
         return AVERROR(EINVAL);

libavfilter/vf_sr.c

@@ -81,7 +81,7 @@ static av_cold int init(AVFilterContext *context)
         av_log(context, AV_LOG_ERROR, "load_model for network was not specified\n");
         return AVERROR(EIO);
     }
-    sr_context->model = (sr_context->dnn_module->load_model)(sr_context->model_filename);
+    sr_context->model = (sr_context->dnn_module->load_model)(sr_context->model_filename, NULL);
     if (!sr_context->model){
         av_log(context, AV_LOG_ERROR, "could not load DNN model\n");
         return AVERROR(EIO);