[FFmpeg-devel] [PATCH] lavfi/dnn_processing: refine code to use function av_image_copy_plane for data copy

[Pedro Arthur]

Em seg., 13 de jan. de 2020 às 08:46, Guo, Yejun <yejun.guo at intel.com> escreveu:
>
> Signed-off-by: Guo, Yejun <yejun.guo at intel.com>
> ---
>  libavfilter/vf_dnn_processing.c | 85 ++++++++++++-----------------------------
>  1 file changed, 24 insertions(+), 61 deletions(-)
>
> diff --git a/libavfilter/vf_dnn_processing.c b/libavfilter/vf_dnn_processing.c
> index 13273f2..492df93 100644
> --- a/libavfilter/vf_dnn_processing.c
> +++ b/libavfilter/vf_dnn_processing.c
> @@ -27,6 +27,7 @@
>  #include "libavutil/opt.h"
>  #include "libavutil/pixdesc.h"
>  #include "libavutil/avassert.h"
> +#include "libavutil/imgutils.h"
>  #include "avfilter.h"
>  #include "dnn_interface.h"
>  #include "formats.h"
> @@ -231,6 +232,8 @@ static int config_output(AVFilterLink *outlink)
>
>  static int copy_from_frame_to_dnn(DNNData *dnn_input, const AVFrame *frame)
>  {
> +    int bytewidth = av_image_get_linesize(frame->format, frame->width, 0);
> +
>      switch (frame->format) {
>      case AV_PIX_FMT_RGB24:
>      case AV_PIX_FMT_BGR24:
> @@ -244,42 +247,17 @@ static int copy_from_frame_to_dnn(DNNData *dnn_input, const AVFrame *frame)
>                  }
>              }
>          } else {
> -            uint8_t *dnn_input_data = dnn_input->data;
>              av_assert0(dnn_input->dt == DNN_UINT8);
> -            for (int i = 0; i < frame->height; i++) {
> -                for(int j = 0; j < frame->width * 3; j++) {
> -                    int k = i * frame->linesize[0] + j;
> -                    int t = i * frame->width * 3 + j;
> -                    dnn_input_data[t] = frame->data[0][k];
> -                }
> -            }
> +            av_image_copy_plane(dnn_input->data, bytewidth,
> +                                frame->data[0], frame->linesize[0],
> +                                bytewidth, frame->height);
>          }
>          return 0;
>      case AV_PIX_FMT_GRAY8:
> -        {
> -            uint8_t *dnn_input_data = dnn_input->data;
> -            av_assert0(dnn_input->dt == DNN_UINT8);
> -            for (int i = 0; i < frame->height; i++) {
> -                for(int j = 0; j < frame->width; j++) {
> -                    int k = i * frame->linesize[0] + j;
> -                    int t = i * frame->width + j;
> -                    dnn_input_data[t] = frame->data[0][k];
> -                }
> -            }
> -        }
> -        return 0;
>      case AV_PIX_FMT_GRAYF32:
> -        {
> -            float *dnn_input_data = dnn_input->data;
> -            av_assert0(dnn_input->dt == DNN_FLOAT);
> -            for (int i = 0; i < frame->height; i++) {
> -                for(int j = 0; j < frame->width; j++) {
> -                    int k = i * frame->linesize[0] + j * sizeof(float);
> -                    int t = i * frame->width + j;
> -                    dnn_input_data[t] = *(float*)(frame->data[0] + k);
> -                }
> -            }
> -        }
> +        av_image_copy_plane(dnn_input->data, bytewidth,
> +                            frame->data[0], frame->linesize[0],
> +                            bytewidth, frame->height);
>          return 0;
>      default:
>          return AVERROR(EIO);
> @@ -290,6 +268,8 @@ static int copy_from_frame_to_dnn(DNNData *dnn_input, const AVFrame *frame)
>
>  static int copy_from_dnn_to_frame(AVFrame *frame, const DNNData *dnn_output)
>  {
> +    int bytewidth = av_image_get_linesize(frame->format, frame->width, 0);
> +
>      switch (frame->format) {
>      case AV_PIX_FMT_RGB24:
>      case AV_PIX_FMT_BGR24:
> @@ -303,42 +283,25 @@ static int copy_from_dnn_to_frame(AVFrame *frame, const DNNData *dnn_output)
>                  }
>              }
>          } else {
> -            uint8_t *dnn_output_data = dnn_output->data;
>              av_assert0(dnn_output->dt == DNN_UINT8);
> -            for (int i = 0; i < frame->height; i++) {
> -                for(int j = 0; j < frame->width * 3; j++) {
> -                    int k = i * frame->linesize[0] + j;
> -                    int t = i * frame->width * 3 + j;
> -                    frame->data[0][k] = dnn_output_data[t];
> -                }
> -            }
> +            av_image_copy_plane(frame->data[0], frame->linesize[0],
> +                                dnn_output->data, bytewidth,
> +                                bytewidth, frame->height);
>          }
>          return 0;
>      case AV_PIX_FMT_GRAY8:
> -        {
> -            uint8_t *dnn_output_data = dnn_output->data;
> -            av_assert0(dnn_output->dt == DNN_UINT8);
> -            for (int i = 0; i < frame->height; i++) {
> -                for(int j = 0; j < frame->width; j++) {
> -                    int k = i * frame->linesize[0] + j;
> -                    int t = i * frame->width + j;
> -                    frame->data[0][k] = dnn_output_data[t];
> -                }
> -            }
> -        }
> +        // it is possible that data type of dnn output is float32,
> +        // need to add support for such case when needed.
> +        av_assert0(dnn_output->dt == DNN_UINT8);
> +        av_image_copy_plane(frame->data[0], frame->linesize[0],
> +                            dnn_output->data, bytewidth,
> +                            bytewidth, frame->height);
>          return 0;
>      case AV_PIX_FMT_GRAYF32:
> -        {
> -            float *dnn_output_data = dnn_output->data;
> -            av_assert0(dnn_output->dt == DNN_FLOAT);
> -            for (int i = 0; i < frame->height; i++) {
> -                for(int j = 0; j < frame->width; j++) {
> -                    int k = i * frame->linesize[0] + j * sizeof(float);
> -                    int t = i * frame->width + j;
> -                    *(float*)(frame->data[0] + k) = dnn_output_data[t];
> -                }
> -            }
> -        }
> +        av_assert0(dnn_output->dt == DNN_FLOAT);
> +        av_image_copy_plane(frame->data[0], frame->linesize[0],
> +                            dnn_output->data, bytewidth,
> +                            bytewidth, frame->height);
>          return 0;
>      default:
>          return AVERROR(EIO);
> --
> 2.7.4
>
LGTM
Pushed, thanks.

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