[FFmpeg-devel] libavfilter/dnn_native: Add support of dilated convolution in dnn_native.

Add dilation parameter in dnn native to support dilated convolution.

Signed-off-by: Xuewei Meng <xwmeng96@gmail.com>
---
 libavfilter/dnn_backend_native.c | 17 +++++++++--------
 libavfilter/dnn_backend_native.h |  1 +
 2 files changed, 10 insertions(+), 8 deletions(-)

Xuewei Meng <xwmeng96@gmail.com> 于2019年5月22日周三 下午9:09写道：
>
> Add dilation parameter in dnn native to support dilated convolution.
>
> Signed-off-by: Xuewei Meng <xwmeng96@gmail.com>
> ---
>  libavfilter/dnn_backend_native.c | 17 +++++++++--------
>  libavfilter/dnn_backend_native.h |  1 +
>  2 files changed, 10 insertions(+), 8 deletions(-)
>
> diff --git a/libavfilter/dnn_backend_native.c b/libavfilter/dnn_backend_native.c
> index 3c8465a283..82e900bd8c 100644
> --- a/libavfilter/dnn_backend_native.c
> +++ b/libavfilter/dnn_backend_native.c
> @@ -63,7 +63,7 @@ static DNNReturnType set_input_output_native(void *model, DNNInputData *input, c
>              cur_channels = conv_params->output_num;
>
>              if (conv_params->padding_method == VALID) {
> -                int pad_size = conv_params->kernel_size - 1;
> +                int pad_size = (conv_params->kernel_size - 1) * conv_params->dilation;
>                  cur_height -= pad_size;
>                  cur_width -= pad_size;
>              }
> @@ -164,6 +164,7 @@ DNNModel *ff_dnn_load_model_native(const char *model_filename)
>                  ff_dnn_free_model_native(&model);
>                  return NULL;
>              }
> +            conv_params->dilation = (int32_t)avio_rl32(model_file_context);
>              conv_params->padding_method = (int32_t)avio_rl32(model_file_context);
>              conv_params->activation = (int32_t)avio_rl32(model_file_context);
>              conv_params->input_num = (int32_t)avio_rl32(model_file_context);
> @@ -171,7 +172,7 @@ DNNModel *ff_dnn_load_model_native(const char *model_filename)
>              conv_params->kernel_size = (int32_t)avio_rl32(model_file_context);
>              kernel_size = conv_params->input_num * conv_params->output_num *
>                            conv_params->kernel_size * conv_params->kernel_size;
> -            dnn_size += 20 + (kernel_size + conv_params->output_num << 2);
> +            dnn_size += 24 + (kernel_size + conv_params->output_num << 2);
>              if (dnn_size > file_size || conv_params->input_num <= 0 ||
>                  conv_params->output_num <= 0 || conv_params->kernel_size <= 0){
>                  avio_closep(&model_file_context);
> @@ -233,7 +234,7 @@ static void convolve(const float *input, float *output, const ConvolutionalParam
>      int src_linesize = width * conv_params->input_num;
>      int filter_linesize = conv_params->kernel_size * conv_params->input_num;
>      int filter_size = conv_params->kernel_size * filter_linesize;
> -    int pad_size = (conv_params->padding_method == VALID) ? (conv_params->kernel_size - 1) / 2 : 0;
> +    int pad_size = (conv_params->padding_method == VALID) ? (conv_params->kernel_size - 1) / 2 * conv_params->dilation : 0;
>
>      for (int y = pad_size; y < height - pad_size; ++y) {
>          for (int x = pad_size; x < width - pad_size; ++x) {
> @@ -245,12 +246,12 @@ static void convolve(const float *input, float *output, const ConvolutionalParam
>                          for (int kernel_x = 0; kernel_x < conv_params->kernel_size; ++kernel_x) {
>                              float input_pel;
>                              if (conv_params->padding_method == SAME_CLAMP_TO_EDGE) {
> -                                int y_pos = CLAMP_TO_EDGE(y + kernel_y - radius, height);
> -                                int x_pos = CLAMP_TO_EDGE(x + kernel_x - radius, width);
> +                                int y_pos = CLAMP_TO_EDGE(y + (kernel_y - radius) * conv_params->dilation, height);
> +                                int x_pos = CLAMP_TO_EDGE(x + (kernel_x - radius) * conv_params->dilation, width);
>                                  input_pel = input[y_pos * src_linesize + x_pos * conv_params->input_num + ch];
>                              } else {
> -                                int y_pos = y + kernel_y - radius;
> -                                int x_pos = x + kernel_x - radius;
> +                                int y_pos = y + (kernel_y - radius) * conv_params->dilation;
> +                                int x_pos = x + (kernel_x - radius) * conv_params->dilation;
>                                  input_pel = (x_pos < 0 || x_pos >= width || y_pos < 0 || y_pos >= height) ? 0.0 :
>                                                     input[y_pos * src_linesize + x_pos * conv_params->input_num + ch];
>                              }
> @@ -334,7 +335,7 @@ DNNReturnType ff_dnn_execute_model_native(const DNNModel *model, DNNData *output
>              convolve(network->layers[layer - 1].output, network->layers[layer].output, conv_params, cur_width, cur_height);
>              cur_channels = conv_params->output_num;
>              if (conv_params->padding_method == VALID) {
> -                int pad_size = conv_params->kernel_size - 1;
> +                int pad_size = (conv_params->kernel_size - 1) * conv_params->dilation;
>                  cur_height -= pad_size;
>                  cur_width -= pad_size;
>              }
> diff --git a/libavfilter/dnn_backend_native.h b/libavfilter/dnn_backend_native.h
> index 7e4e943137..5917955733 100644
> --- a/libavfilter/dnn_backend_native.h
> +++ b/libavfilter/dnn_backend_native.h
> @@ -46,6 +46,7 @@ typedef struct ConvolutionalParams{
>      int32_t input_num, output_num, kernel_size;
>      DNNActivationFunc activation;
>      DNNConvPaddingParam padding_method;
> +    int32_t dilation;
>      float *kernel;
>      float *biases;
>  } ConvolutionalParams;
> --
> 2.17.1
>
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Applied


Thanks