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libavfilter: Add dehaze-filter option in existing derain.

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Add the support of dehaze filter in existing derain filter source
code. As the processing procedure in FFmpeg is the same for current
derain and dehaze, we reuse the derain filter source code. The
model training and generation scripts are in repo
https://github.com/XueweiMeng/derain_filter.git

Reviewed-by: Steven Liu <lq@onvideo.cn>
Signed-off-by: Xuewei Meng <xwmeng96@gmail.com>
This commit is contained in:
Xuewei Meng 2019-08-22 18:28:44 +08:00 committed by Steven Liu
parent 434588596f
commit f0c97d613e
2 changed files with 16 additions and 0 deletions
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12
doc/filters.texi
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@ -8449,6 +8449,18 @@ files (.pb) by using tools/python/convert.py
The filter accepts the following options:
@table @option
@item filter_type
Specify which filter to use. This option accepts the following values:
@table @samp
@item derain
Derain filter. To conduct derain filter, you need to use a derain model.
@item dehaze
Dehaze filter. To conduct dehaze filter, you need to use a dehaze model.
@end table
Default value is @samp{derain}.
@item dnn_backend
Specify which DNN backend to use for model loading and execution. This option accepts
the following values:

4
libavfilter/vf_derain.c
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@ -34,6 +34,7 @@
typedef struct DRContext {
const AVClass *class;
int filter_type;
char *model_filename;
DNNBackendType backend_type;
DNNModule *dnn_module;
@ -46,6 +47,9 @@ typedef struct DRContext {
#define OFFSET(x) offsetof(DRContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
static const AVOption derain_options[] = {
{ "filter_type", "filter type(derain/dehaze)", OFFSET(filter_type), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS, "type" },
{ "derain", "derain filter flag", 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, 0, 0, FLAGS, "type" },
{ "dehaze", "dehaze filter flag", 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, 0, 0, FLAGS, "type" },
{ "dnn_backend", "DNN backend", OFFSET(backend_type), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS, "backend" },
{ "native", "native backend flag", 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, 0, 0, FLAGS, "backend" },
#if (CONFIG_LIBTENSORFLOW == 1)