| /* |
| * Copyright (c) 2021 Paul B Mahol |
| * |
| * 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 "libavutil/imgutils.h" |
| #include "libavutil/pixdesc.h" |
| #include "libavutil/opt.h" |
| #include "avfilter.h" |
| #include "internal.h" |
| #include "video.h" |
| #include "framesync.h" |
| |
| typedef struct ThreadData { |
| AVFrame *filtered, *source, *reference, *dst; |
| } ThreadData; |
| |
| typedef struct LimitDiffContext { |
| const AVClass *class; |
| |
| float threshold; |
| float elasticity; |
| int reference; |
| int planes; |
| |
| int thr1, thr2; |
| |
| int linesize[4]; |
| int planewidth[4], planeheight[4]; |
| int nb_planes; |
| int depth; |
| FFFrameSync fs; |
| |
| void (*limitdiff)(const uint8_t *filtered, uint8_t *dst, |
| const uint8_t *source, const uint8_t *reference, |
| int thr1, int thr2, int w, int depth); |
| } LimitDiffContext; |
| |
| #define OFFSET(x) offsetof(LimitDiffContext, x) |
| #define TFLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM |
| #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
| |
| static const AVOption limitdiff_options[] = { |
| { "threshold", "set the threshold", OFFSET(threshold), AV_OPT_TYPE_FLOAT, {.dbl=1/255.f}, 0, 1, TFLAGS }, |
| { "elasticity", "set the elasticity", OFFSET(elasticity), AV_OPT_TYPE_FLOAT, {.dbl=2.f}, 0, 10, TFLAGS }, |
| { "reference", "enable reference stream", OFFSET(reference), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS }, |
| { "planes", "set the planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, TFLAGS }, |
| { NULL } |
| }; |
| |
| static const enum AVPixelFormat pix_fmts[] = { |
| AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, |
| AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, |
| AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P, |
| AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P, |
| AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, |
| AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9, |
| AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, |
| AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12, |
| AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14, |
| AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, |
| AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, |
| AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10, |
| AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12, |
| AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16, |
| AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, |
| AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16, |
| AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16, |
| AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16, |
| AV_PIX_FMT_NONE |
| }; |
| |
| static void limitdiff8(const uint8_t *filtered, uint8_t *dst, |
| const uint8_t *source, const uint8_t *reference, |
| int thr1, int thr2, int w, int depth) |
| { |
| for (int x = 0; x < w; x++) { |
| const int diff = filtered[x] - source[x]; |
| const int diff_ref = FFABS(filtered[x] - reference[x]); |
| |
| if (diff_ref <= thr1) |
| dst[x] = filtered[x]; |
| else if (diff_ref >= thr2) |
| dst[x] = source[x]; |
| else |
| dst[x] = av_clip_uint8(source[x] + diff * (thr2 - diff_ref) / (thr2 - thr1)); |
| } |
| } |
| |
| static void limitdiff16(const uint8_t *ffiltered, uint8_t *ddst, |
| const uint8_t *ssource, const uint8_t *rreference, |
| int thr1, int thr2, int w, int depth) |
| { |
| const uint16_t *source = (const uint16_t *)ssource; |
| const uint16_t *filtered = (const uint16_t *)ffiltered; |
| const uint16_t *reference = (const uint16_t *)rreference; |
| uint16_t *dst = (uint16_t *)ddst; |
| |
| for (int x = 0; x < w; x++) { |
| const int diff = filtered[x] - source[x]; |
| const int diff_ref = FFABS(filtered[x] - reference[x]); |
| |
| if (diff_ref <= thr1) |
| dst[x] = filtered[x]; |
| else if (diff_ref >= thr2) |
| dst[x] = source[x]; |
| else |
| dst[x] = av_clip_uintp2_c(source[x] + diff * (thr2 - diff_ref) / (thr2 - thr1), depth); |
| } |
| } |
| |
| static int config_input(AVFilterLink *inlink) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| LimitDiffContext *s = ctx->priv; |
| const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
| int vsub, hsub, ret; |
| |
| s->nb_planes = av_pix_fmt_count_planes(inlink->format); |
| |
| if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0) |
| return ret; |
| |
| hsub = desc->log2_chroma_w; |
| vsub = desc->log2_chroma_h; |
| s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, vsub); |
| s->planeheight[0] = s->planeheight[3] = inlink->h; |
| s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, hsub); |
| s->planewidth[0] = s->planewidth[3] = inlink->w; |
| |
| s->depth = desc->comp[0].depth; |
| s->thr1 = s->threshold * ((1 << s->depth) - 1); |
| s->thr2 = s->thr1 * s->elasticity; |
| |
| if (desc->comp[0].depth == 8) |
| s->limitdiff = limitdiff8; |
| else |
| s->limitdiff = limitdiff16; |
| |
| return 0; |
| } |
| |
| static int limitdiff_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
| { |
| LimitDiffContext *s = ctx->priv; |
| const int depth = s->depth; |
| ThreadData *td = arg; |
| |
| for (int p = 0; p < s->nb_planes; p++) { |
| const ptrdiff_t filtered_linesize = td->filtered->linesize[p]; |
| const ptrdiff_t source_linesize = td->source->linesize[p]; |
| const ptrdiff_t reference_linesize = td->reference->linesize[p]; |
| const ptrdiff_t dst_linesize = td->dst->linesize[p]; |
| const int thr1 = s->thr1; |
| const int thr2 = s->thr2; |
| const int w = s->planewidth[p]; |
| const int h = s->planeheight[p]; |
| const int slice_start = (h * jobnr) / nb_jobs; |
| const int slice_end = (h * (jobnr+1)) / nb_jobs; |
| const uint8_t *filtered = td->filtered->data[p] + slice_start * filtered_linesize; |
| const uint8_t *source = td->source->data[p] + slice_start * source_linesize; |
| const uint8_t *reference = td->reference->data[p] + slice_start * reference_linesize; |
| uint8_t *dst = td->dst->data[p] + slice_start * dst_linesize; |
| |
| if (!((1 << p) & s->planes)) { |
| av_image_copy_plane(dst, dst_linesize, filtered, filtered_linesize, |
| s->linesize[p], slice_end - slice_start); |
| continue; |
| } |
| |
| for (int y = slice_start; y < slice_end; y++) { |
| s->limitdiff(filtered, dst, source, reference, thr1, thr2, w, depth); |
| |
| dst += dst_linesize; |
| filtered += filtered_linesize; |
| source += source_linesize; |
| reference += reference_linesize; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int process_frame(FFFrameSync *fs) |
| { |
| AVFilterContext *ctx = fs->parent; |
| LimitDiffContext *s = fs->opaque; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| AVFrame *out, *filtered, *source, *reference = NULL; |
| int ret; |
| |
| if ((ret = ff_framesync_get_frame(&s->fs, 0, &filtered, 0)) < 0 || |
| (ret = ff_framesync_get_frame(&s->fs, 1, &source, 0)) < 0) |
| return ret; |
| if (s->reference) { |
| if ((ret = ff_framesync_get_frame(&s->fs, 2, &reference, 0)) < 0) |
| return ret; |
| } |
| |
| if (ctx->is_disabled) { |
| out = av_frame_clone(filtered); |
| if (!out) |
| return AVERROR(ENOMEM); |
| } else { |
| ThreadData td; |
| |
| out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
| if (!out) |
| return AVERROR(ENOMEM); |
| av_frame_copy_props(out, filtered); |
| |
| td.filtered = filtered; |
| td.source = source; |
| td.reference = reference ? reference : source; |
| td.dst = out; |
| |
| ff_filter_execute(ctx, limitdiff_slice, &td, NULL, |
| FFMIN(s->planeheight[0], ff_filter_get_nb_threads(ctx))); |
| } |
| out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base); |
| |
| return ff_filter_frame(outlink, out); |
| } |
| |
| static int config_output(AVFilterLink *outlink) |
| { |
| AVFilterContext *ctx = outlink->src; |
| LimitDiffContext *s = ctx->priv; |
| AVFilterLink *filtered = ctx->inputs[0]; |
| AVFilterLink *source = ctx->inputs[1]; |
| FFFrameSyncIn *in; |
| int ret; |
| |
| if (filtered->w != source->w || filtered->h != source->h) { |
| av_log(ctx, AV_LOG_ERROR, "First input link %s parameters " |
| "(size %dx%d) do not match the corresponding " |
| "second input link %s parameters (%dx%d)\n", |
| ctx->input_pads[0].name, filtered->w, filtered->h, |
| ctx->input_pads[1].name, source->w, source->h); |
| return AVERROR(EINVAL); |
| } |
| |
| if (s->reference) { |
| AVFilterLink *reference = ctx->inputs[2]; |
| |
| if (filtered->w != reference->w || filtered->h != reference->h) { |
| av_log(ctx, AV_LOG_ERROR, "First input link %s parameters " |
| "(size %dx%d) do not match the corresponding " |
| "third input link %s parameters (%dx%d)\n", |
| ctx->input_pads[0].name, filtered->w, filtered->h, |
| ctx->input_pads[1].name, reference->w, reference->h); |
| return AVERROR(EINVAL); |
| } |
| } |
| |
| outlink->w = filtered->w; |
| outlink->h = filtered->h; |
| outlink->sample_aspect_ratio = filtered->sample_aspect_ratio; |
| outlink->frame_rate = filtered->frame_rate; |
| |
| if ((ret = ff_framesync_init(&s->fs, ctx, 2 + !!s->reference)) < 0) |
| return ret; |
| |
| in = s->fs.in; |
| in[0].time_base = filtered->time_base; |
| in[1].time_base = source->time_base; |
| if (s->reference) |
| in[2].time_base = ctx->inputs[2]->time_base; |
| in[0].sync = 1; |
| in[0].before = EXT_STOP; |
| in[0].after = EXT_INFINITY; |
| in[1].sync = 1; |
| in[1].before = EXT_STOP; |
| in[1].after = EXT_INFINITY; |
| if (s->reference) { |
| in[2].sync = 1; |
| in[2].before = EXT_STOP; |
| in[2].after = EXT_INFINITY; |
| } |
| s->fs.opaque = s; |
| s->fs.on_event = process_frame; |
| |
| ret = ff_framesync_configure(&s->fs); |
| outlink->time_base = s->fs.time_base; |
| |
| return ret; |
| } |
| |
| static int activate(AVFilterContext *ctx) |
| { |
| LimitDiffContext *s = ctx->priv; |
| return ff_framesync_activate(&s->fs); |
| } |
| |
| static av_cold int init(AVFilterContext *ctx) |
| { |
| const LimitDiffContext *s = ctx->priv; |
| AVFilterPad pad = { |
| .name = "filtered", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .config_props = config_input, |
| }; |
| int ret; |
| |
| if ((ret = ff_append_inpad(ctx, &pad)) < 0) |
| return ret; |
| |
| pad.name = "source"; |
| pad.config_props = NULL; |
| if ((ret = ff_append_inpad(ctx, &pad)) < 0) |
| return ret; |
| |
| if (s->reference) { |
| pad.name = "reference"; |
| pad.config_props = NULL; |
| if ((ret = ff_append_inpad(ctx, &pad)) < 0) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static av_cold void uninit(AVFilterContext *ctx) |
| { |
| LimitDiffContext *s = ctx->priv; |
| |
| ff_framesync_uninit(&s->fs); |
| } |
| |
| static const AVFilterPad limitdiff_outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .config_props = config_output, |
| }, |
| }; |
| |
| AVFILTER_DEFINE_CLASS(limitdiff); |
| |
| const AVFilter ff_vf_limitdiff = { |
| .name = "limitdiff", |
| .description = NULL_IF_CONFIG_SMALL("Apply filtering with limiting difference."), |
| .priv_class = &limitdiff_class, |
| .priv_size = sizeof(LimitDiffContext), |
| .init = init, |
| .uninit = uninit, |
| .activate = activate, |
| FILTER_OUTPUTS(limitdiff_outputs), |
| FILTER_PIXFMTS_ARRAY(pix_fmts), |
| .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | |
| AVFILTER_FLAG_SLICE_THREADS | |
| AVFILTER_FLAG_DYNAMIC_INPUTS, |
| .process_command = ff_filter_process_command, |
| }; |