dnn: extract common functions used by different filters

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

1 files changed, 106 insertions, 0 deletions

diff --git a/libavfilter/dnn_filter_common.c b/libavfilter/dnn_filter_common.c
new file mode 100644
index 0000000000..5d0d7d3b90
--- /dev/null
+++ b/libavfilter/dnn_filter_common.c
@@ -0,0 +1,106 @@
+/*
+ * 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 "dnn_filter_common.h"
+
+int ff_dnn_init(DnnContext *ctx, AVFilterContext *filter_ctx)
+{
+    if (!ctx->model_filename) {
+        av_log(filter_ctx, AV_LOG_ERROR, "model file for network is not specified\n");
+        return AVERROR(EINVAL);
+    }
+    if (!ctx->model_inputname) {
+        av_log(filter_ctx, AV_LOG_ERROR, "input name of the model network is not specified\n");
+        return AVERROR(EINVAL);
+    }
+    if (!ctx->model_outputname) {
+        av_log(filter_ctx, AV_LOG_ERROR, "output name of the model network is not specified\n");
+        return AVERROR(EINVAL);
+    }
+
+    ctx->dnn_module = ff_get_dnn_module(ctx->backend_type);
+    if (!ctx->dnn_module) {
+        av_log(filter_ctx, AV_LOG_ERROR, "could not create DNN module for requested backend\n");
+        return AVERROR(ENOMEM);
+    }
+    if (!ctx->dnn_module->load_model) {
+        av_log(filter_ctx, AV_LOG_ERROR, "load_model for network is not specified\n");
+        return AVERROR(EINVAL);
+    }
+
+    ctx->model = (ctx->dnn_module->load_model)(ctx->model_filename, ctx->backend_options, filter_ctx);
+    if (!ctx->model) {
+        av_log(filter_ctx, AV_LOG_ERROR, "could not load DNN model\n");
+        return AVERROR(EINVAL);
+    }
+
+    if (!ctx->dnn_module->execute_model_async && ctx->async) {
+        ctx->async = 0;
+        av_log(filter_ctx, AV_LOG_WARNING, "this backend does not support async execution, roll back to sync.\n");
+    }
+
+#if !HAVE_PTHREAD_CANCEL
+    if (ctx->async) {
+        ctx->async = 0;
+        av_log(filter_ctx, AV_LOG_WARNING, "pthread is not supported, roll back to sync.\n");
+    }
+#endif
+
+    return 0;
+}
+
+DNNReturnType ff_dnn_get_input(DnnContext *ctx, DNNData *input)
+{
+    return ctx->model->get_input(ctx->model->model, input, ctx->model_inputname);
+}
+
+DNNReturnType ff_dnn_get_output(DnnContext *ctx, int input_width, int input_height, int *output_width, int *output_height)
+{
+    return ctx->model->get_output(ctx->model->model, ctx->model_inputname, input_width, input_height,
+                                    ctx->model_outputname, output_width, output_height);
+}
+
+DNNReturnType ff_dnn_execute_model(DnnContext *ctx, AVFrame *in_frame, AVFrame *out_frame)
+{
+    return (ctx->dnn_module->execute_model)(ctx->model, ctx->model_inputname, in_frame,
+                                            (const char **)&ctx->model_outputname, 1, out_frame);
+}
+
+DNNReturnType ff_dnn_execute_model_async(DnnContext *ctx, AVFrame *in_frame, AVFrame *out_frame)
+{
+    return (ctx->dnn_module->execute_model_async)(ctx->model, ctx->model_inputname, in_frame,
+                                                  (const char **)&ctx->model_outputname, 1, out_frame);
+}
+
+DNNAsyncStatusType ff_dnn_get_async_result(DnnContext *ctx, AVFrame **in_frame, AVFrame **out_frame)
+{
+    return (ctx->dnn_module->get_async_result)(ctx->model, in_frame, out_frame);
+}
+
+DNNReturnType ff_dnn_flush(DnnContext *ctx)
+{
+    return (ctx->dnn_module->flush)(ctx->model);
+}
+
+void ff_dnn_uninit(DnnContext *ctx)
+{
+    if (ctx->dnn_module) {
+        (ctx->dnn_module->free_model)(&ctx->model);
+        av_freep(&ctx->dnn_module);
+    }
+}