| /* |
| * Copyright (c) 2019 Xuewei Meng |
| * |
| * 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 |
| * Filter implementing image derain filter using deep convolutional networks. |
| * http://openaccess.thecvf.com/content_ECCV_2018/html/Xia_Li_Recurrent_Squeeze-and-Excitation_Context_ECCV_2018_paper.html |
| */ |
| |
| #include "libavutil/opt.h" |
| #include "avfilter.h" |
| #include "dnn_filter_common.h" |
| #include "internal.h" |
| #include "video.h" |
| |
| typedef struct DRContext { |
| const AVClass *class; |
| DnnContext dnnctx; |
| int filter_type; |
| } 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, .unit = "type" }, |
| { "derain", "derain filter flag", 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, 0, 0, FLAGS, .unit = "type" }, |
| { "dehaze", "dehaze filter flag", 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, 0, 0, FLAGS, .unit = "type" }, |
| { "dnn_backend", "DNN backend", OFFSET(dnnctx.backend_type), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, FLAGS, .unit = "backend" }, |
| #if (CONFIG_LIBTENSORFLOW == 1) |
| { "tensorflow", "tensorflow backend flag", 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, 0, 0, FLAGS, .unit = "backend" }, |
| #endif |
| { NULL } |
| }; |
| |
| AVFILTER_DNN_DEFINE_CLASS(derain); |
| |
| static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
| { |
| DNNAsyncStatusType async_state = 0; |
| AVFilterContext *ctx = inlink->dst; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| DRContext *dr_context = ctx->priv; |
| int dnn_result; |
| AVFrame *out; |
| |
| out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
| if (!out) { |
| av_log(ctx, AV_LOG_ERROR, "could not allocate memory for output frame\n"); |
| av_frame_free(&in); |
| return AVERROR(ENOMEM); |
| } |
| av_frame_copy_props(out, in); |
| |
| dnn_result = ff_dnn_execute_model(&dr_context->dnnctx, in, out); |
| if (dnn_result != 0){ |
| av_log(ctx, AV_LOG_ERROR, "failed to execute model\n"); |
| av_frame_free(&in); |
| return dnn_result; |
| } |
| do { |
| async_state = ff_dnn_get_result(&dr_context->dnnctx, &in, &out); |
| } while (async_state == DAST_NOT_READY); |
| |
| if (async_state != DAST_SUCCESS) |
| return AVERROR(EINVAL); |
| |
| av_frame_free(&in); |
| |
| return ff_filter_frame(outlink, out); |
| } |
| |
| static av_cold int init(AVFilterContext *ctx) |
| { |
| DRContext *dr_context = ctx->priv; |
| return ff_dnn_init(&dr_context->dnnctx, DFT_PROCESS_FRAME, ctx); |
| } |
| |
| static av_cold void uninit(AVFilterContext *ctx) |
| { |
| DRContext *dr_context = ctx->priv; |
| ff_dnn_uninit(&dr_context->dnnctx); |
| } |
| |
| static const AVFilterPad derain_inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .filter_frame = filter_frame, |
| }, |
| }; |
| |
| const AVFilter ff_vf_derain = { |
| .name = "derain", |
| .description = NULL_IF_CONFIG_SMALL("Apply derain filter to the input."), |
| .priv_size = sizeof(DRContext), |
| .preinit = ff_dnn_filter_init_child_class, |
| .init = init, |
| .uninit = uninit, |
| FILTER_INPUTS(derain_inputs), |
| FILTER_OUTPUTS(ff_video_default_filterpad), |
| FILTER_SINGLE_PIXFMT(AV_PIX_FMT_RGB24), |
| .priv_class = &derain_class, |
| .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
| }; |