Hi,
Em seg, 1 de jul de 2019 às 05:10, Guo, Yejun <yejun....@intel.com> escreveu:
>
> the reason to add this layer first is that vf_sr uses it in its
> tensorflow model, and the next plan is to update the python script
> to convert tf.pad into native model.
>
> Signed-off-by: Guo, Yejun <yejun....@intel.com>
> ---
> libavfilter/dnn/Makefile | 1 +
> libavfilter/dnn/dnn_backend_native_layer_pad.c | 211
> +++++++++++++++++++++++++
> libavfilter/dnn/dnn_backend_native_layer_pad.h | 40 +++++
> 3 files changed, 252 insertions(+)
> create mode 100644 libavfilter/dnn/dnn_backend_native_layer_pad.c
> create mode 100644 libavfilter/dnn/dnn_backend_native_layer_pad.h
>
> diff --git a/libavfilter/dnn/Makefile b/libavfilter/dnn/Makefile
> index 1d12ade..83938e5 100644
> --- a/libavfilter/dnn/Makefile
> +++ b/libavfilter/dnn/Makefile
> @@ -1,5 +1,6 @@
> OBJS-$(CONFIG_DNN) += dnn/dnn_interface.o
> OBJS-$(CONFIG_DNN) += dnn/dnn_backend_native.o
> +OBJS-$(CONFIG_DNN) +=
> dnn/dnn_backend_native_layer_pad.o
>
> DNN-OBJS-$(CONFIG_LIBTENSORFLOW) += dnn/dnn_backend_tf.o
>
> diff --git a/libavfilter/dnn/dnn_backend_native_layer_pad.c
> b/libavfilter/dnn/dnn_backend_native_layer_pad.c
> new file mode 100644
> index 0000000..aa12f7f
> --- /dev/null
> +++ b/libavfilter/dnn/dnn_backend_native_layer_pad.c
> @@ -0,0 +1,211 @@
> +/*
> + * Copyright (c) 2019 Guo Yejun
> + *
> + * 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 <string.h>
> +#include "libavutil/avassert.h"
> +#include "dnn_backend_native_layer_pad.h"
> +
> +static int before_get_buddy(int given, int paddings, LayerPadModeParam mode)
> +{
> + if (mode == LPMP_SYMMETRIC) {
> + return (2 * paddings - 1 - given);
> + } else if (mode == LPMP_REFLECT) {
> + return (2 * paddings - given);
> + } else {
> + av_assert0(!"should not reach here");
> + return 0;
> + }
> +}
> +
> +static int after_get_buddy(int given, int border, LayerPadModeParam mode)
> +{
> + if (mode == LPMP_SYMMETRIC) {
> + int offset = given - border;
> + return (border - 1 - offset);
> + } else if (mode == LPMP_REFLECT) {
> + int offset = given - border;
> + return (border - 2 - offset);
> + } else {
> + av_assert0(!"should not reach here");
> + return 0;
> + }
> +}
> +
> +void dnn_execute_layer_pad(const float *input, float *output, const
> LayerPadParams *params, int number, int height, int width, int channel)
> +{
> + int32_t before_paddings;
> + int32_t after_paddings;
> +
> + // suppose format is <N, H, W, C>
> + int new_number = number + params->paddings[0][0] +
> params->paddings[0][1];
> + int new_height = height + params->paddings[1][0] +
> params->paddings[1][1];
> + int new_width = width + params->paddings[2][0] + params->paddings[2][1];
> + int new_channel = channel + params->paddings[3][0] +
> params->paddings[3][1];
> +
> + int c_stride = channel;
> + int wc_stride = c_stride * width;
> + int hwc_stride = wc_stride * height;
> +
> + int new_c_stride = new_channel;
> + int new_wc_stride = new_c_stride * new_width;
> + int new_hwc_stride = new_wc_stride * new_height;
> +
> + // copy the original data
> + for (int n = 0; n < number; n++) {
> + for (int h = 0; h < height; h++) {
> + for (int w = 0; w < width; w++) {
> + const float *src = input + n * hwc_stride + h * wc_stride +
> w * c_stride;
> + float *dst = output + (n + params->paddings[0][0]) *
> new_hwc_stride
> + + (h + params->paddings[1][0]) *
> new_wc_stride
> + + (w + params->paddings[2][0]) *
> new_c_stride
> + + params->paddings[3][0];
> + memcpy(dst, src, channel * sizeof(float));
> + }
> + }
> + }
> +
> + // handle the first dimension
> + before_paddings = params->paddings[0][0];
> + after_paddings = params->paddings[0][1];
> + for (int n = 0; n < before_paddings; n++) {
> + float *dst = output + n * new_hwc_stride;
> + if (params->mode == LPMP_CONSTANT) {
> + for (int i = 0; i < new_hwc_stride; i++) {
> + *dst = params->constant_values;
I suppose it is missing a pointer increase in dst ptr?
I found this same pattern in all loops below.
> + }
> + }
> + else {
> + int buddy = before_get_buddy(n, before_paddings, params->mode);
> + float *src = output + buddy * new_hwc_stride;
> + memcpy(dst, src, new_hwc_stride * sizeof(float));
> + }
> + }
> + for (int n = 0; n < after_paddings; n++) {
> + int given = number + before_paddings + n;
> + float *dst = output + given * new_hwc_stride;
> + if (params->mode == LPMP_CONSTANT) {
> + for (int i = 0; i < new_hwc_stride; i++) {
> + *dst = params->constant_values;
there
> + }
> + } else {
> + int buddy = after_get_buddy(given, number + before_paddings,
> params->mode);
> + float *src = output + buddy * new_hwc_stride;
> + memcpy(dst, src, new_hwc_stride * sizeof(float));
> + }
> + }
> +
> + // handle the second dimension
> + before_paddings = params->paddings[1][0];
> + after_paddings = params->paddings[1][1];
> + for (int n = 0; n < new_number; n++) {
> + float *start = output + n * new_hwc_stride;
> + for (int h = 0; h < before_paddings; h++) {
> + float *dst = start + h * new_wc_stride;
> + if (params->mode == LPMP_CONSTANT) {
> + for (int i = 0; i < new_wc_stride; i++) {
> + *dst = params->constant_values;
there
> + }
> + } else {
> + int buddy = before_get_buddy(h, before_paddings,
> params->mode);
> + float *src = start + buddy * new_wc_stride;
> + memcpy(dst, src, new_wc_stride * sizeof(float));
> + }
> + }
> + for (int h = 0; h < after_paddings; h++) {
> + int given = height + before_paddings + h;
> + float *dst = start + given * new_wc_stride;
> + if (params->mode == LPMP_CONSTANT) {
> + for (int i = 0; i < new_wc_stride; i++) {
> + *dst = params->constant_values;
there
> + }
> + } else {
> + int buddy = after_get_buddy(given, height + before_paddings,
> params->mode);
> + float *src = start + buddy * new_wc_stride;
> + memcpy(dst, src, new_wc_stride * sizeof(float));
> + }
> + }
> + }
> +
> + // handle the third dimension
> + before_paddings = params->paddings[2][0];
> + after_paddings = params->paddings[2][1];
> + for (int n = 0; n < new_number; n++) {
> + for (int h = 0; h < new_height; h++) {
> + float *start = output + n * new_hwc_stride + h * new_wc_stride;
> + for (int w = 0; w < before_paddings; w++) {
> + float *dst = start + w * new_c_stride;
> + if (params->mode == LPMP_CONSTANT) {
> + for (int i = 0; i < new_c_stride; i++) {
> + *dst = params->constant_values;
there
> + }
> + } else {
> + int buddy = before_get_buddy(w, before_paddings,
> params->mode);
> + float *src = start + buddy * new_c_stride;
> + memcpy(dst, src, new_c_stride * sizeof(float));
> + }
> + }
> + for (int w = 0; w < after_paddings; w++) {
> + int given = width + before_paddings + w;
> + float *dst = start + given * new_c_stride;
> + if (params->mode == LPMP_CONSTANT) {
> + for (int i = 0; i < new_c_stride; i++) {
> + *dst = params->constant_values;
there
> + }
> + } else {
> + int buddy = after_get_buddy(given, width +
> before_paddings, params->mode);
> + float *src = start + buddy * new_c_stride;
> + memcpy(dst, src, new_c_stride * sizeof(float));
> + }
> + }
> + }
> + }
> +
> + // handle the fourth dimension
> + before_paddings = params->paddings[3][0];
> + after_paddings = params->paddings[3][1];
> + for (int n = 0; n < new_number; n++) {
> + for (int h = 0; h < new_height; h++) {
> + for (int w = 0; w < new_width; w++) {
> + float *start = output + n * new_hwc_stride + h *
> new_wc_stride + w * new_c_stride;
> + for (int c = 0; c < before_paddings; c++) {
> + float *dst = start + c;
> + if (params->mode == LPMP_CONSTANT) {
> + *dst = params->constant_values;
> + } else {
> + int buddy = before_get_buddy(c, before_paddings,
> params->mode);
> + float *src = start + buddy;
> + *dst = *src;
> + }
> + }
> + for (int c = 0; c < after_paddings; c++) {
> + int given = channel + before_paddings + c;
> + float *dst = start + given;
> + if (params->mode == LPMP_CONSTANT) {
> + *dst = params->constant_values;
> + } else {
> + int buddy = after_get_buddy(given, channel +
> before_paddings, params->mode);
> + float *src = start + buddy;
> + *dst = *src;
> + }
> + }
> + }
> + }
> + }
> +}
> diff --git a/libavfilter/dnn/dnn_backend_native_layer_pad.h
> b/libavfilter/dnn/dnn_backend_native_layer_pad.h
> new file mode 100644
> index 0000000..465e96a
> --- /dev/null
> +++ b/libavfilter/dnn/dnn_backend_native_layer_pad.h
> @@ -0,0 +1,40 @@
> +/*
> + * Copyright (c) 2019 Guo Yejun
> + *
> + * 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
> + * layer pad (equivalent to tf.pad) for native backend.
> + */
> +#include <stdint.h>
> +
> +#ifndef AVFILTER_DNN_BACKEND_NATIVE_LAYER_PAD_H
> +#define AVFILTER_DNN_BACKEND_NATIVE_LAYER_PAD_H
> +
> +typedef enum {LPMP_CONSTANT, LPMP_REFLECT, LPMP_SYMMETRIC} LayerPadModeParam;
> +
> +typedef struct LayerPadParams{
> + int32_t paddings[4][2];
> + LayerPadModeParam mode;
> + float constant_values;
> +} LayerPadParams;
> +
> +void dnn_execute_layer_pad(const float *input, float *output, const
> LayerPadParams *params, int number, int height, int width, int channel);
> +
> +#endif
> --
> 2.7.4
>
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