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-rw-r--r--libavfilter/vf_deband.c312
1 files changed, 312 insertions, 0 deletions
diff --git a/libavfilter/vf_deband.c b/libavfilter/vf_deband.c
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+/*
+ * Copyright (c) 2015 Niklas Haas
+ * Copyright (c) 2015 Paul B Mahol
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+#include "avfilter.h"
+#include "internal.h"
+#include "video.h"
+
+typedef struct DebandContext {
+ const AVClass *class;
+
+ float threshold[4];
+ int range;
+ int blur;
+ float direction;
+
+ int nb_components;
+ int planewidth[4];
+ int planeheight[4];
+ int thr[4];
+
+ int *x_pos;
+ int *y_pos;
+
+ int (*deband)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
+} DebandContext;
+
+#define OFFSET(x) offsetof(DebandContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+
+static const AVOption deband_options[] = {
+ { "1thr", "set 1st plane threshold", OFFSET(threshold[0]), AV_OPT_TYPE_FLOAT, {.dbl=0.02}, 0.00003, 0.5, FLAGS },
+ { "2thr", "set 2nd plane threshold", OFFSET(threshold[1]), AV_OPT_TYPE_FLOAT, {.dbl=0.02}, 0.00003, 0.5, FLAGS },
+ { "3thr", "set 3rd plane threshold", OFFSET(threshold[2]), AV_OPT_TYPE_FLOAT, {.dbl=0.02}, 0.00003, 0.5, FLAGS },
+ { "4thr", "set 4th plane threshold", OFFSET(threshold[3]), AV_OPT_TYPE_FLOAT, {.dbl=0.02}, 0.00003, 0.5, FLAGS },
+ { "range", "set range", OFFSET(range), AV_OPT_TYPE_INT, {.i64=16}, INT_MIN, INT_MAX, FLAGS },
+ { "r", "set range", OFFSET(range), AV_OPT_TYPE_INT, {.i64=16}, INT_MIN, INT_MAX, FLAGS },
+ { "direction", "set direction", OFFSET(direction), AV_OPT_TYPE_FLOAT, {.dbl=2*M_PI},-2*M_PI, 2*M_PI, FLAGS },
+ { "d", "set direction", OFFSET(direction), AV_OPT_TYPE_FLOAT, {.dbl=2*M_PI},-2*M_PI, 2*M_PI, FLAGS },
+ { "blur", "set blur", OFFSET(blur), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(deband);
+
+static int query_formats(AVFilterContext *ctx)
+{
+ static const enum AVPixelFormat pix_fmts[] = {
+ AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16,
+ AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
+ AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P,
+ AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
+ AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ440P,
+ AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
+ AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
+ 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_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12,
+ AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
+ AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
+ AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
+ AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14,
+ AV_PIX_FMT_GBRP16, AV_PIX_FMT_GBRAP16,
+ AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
+ AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
+ AV_PIX_FMT_NONE
+ };
+ AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
+ if (!fmts_list)
+ return AVERROR(ENOMEM);
+
+ return ff_set_common_formats(ctx, fmts_list);
+}
+
+static float frand(int x, int y)
+{
+ const float r = sinf(x * 12.9898 + y * 78.233) * 43758.545;
+
+ return r - floorf(r);
+}
+
+static int inline get_avg(int ref0, int ref1, int ref2, int ref3)
+{
+ return (ref0 + ref1 + ref2 + ref3) / 4;
+}
+
+typedef struct ThreadData {
+ AVFrame *in, *out;
+} ThreadData;
+
+static int deband_8_c(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
+{
+ DebandContext *s = ctx->priv;
+ ThreadData *td = arg;
+ AVFrame *in = td->in;
+ AVFrame *out = td->out;
+ int x, y, p;
+
+ for (p = 0; p < s->nb_components; p++) {
+ const uint8_t *src_ptr = (const uint8_t *)in->data[p];
+ uint8_t *dst_ptr = (uint8_t *)out->data[p];
+ const int dst_linesize = out->linesize[p];
+ const int src_linesize = in->linesize[p];
+ const int thr = s->thr[p];
+ const int start = (s->planeheight[p] * jobnr ) / nb_jobs;
+ const int end = (s->planeheight[p] * (jobnr+1)) / nb_jobs;
+ const int w = s->planewidth[p] - 1;
+ const int h = s->planeheight[p] - 1;
+
+ for (y = start; y < end; y++) {
+ const int pos = y * s->planeheight[0];
+
+ for (x = 0; x < s->planewidth[p]; x++) {
+ const int x_pos = s->x_pos[pos + x];
+ const int y_pos = s->y_pos[pos + x];
+ const int ref0 = src_ptr[av_clip(y + y_pos, 0, h) * src_linesize + av_clip(x + x_pos, 0, w)];
+ const int ref1 = src_ptr[av_clip(y + -y_pos, 0, h) * src_linesize + av_clip(x + x_pos, 0, w)];
+ const int ref2 = src_ptr[av_clip(y + -y_pos, 0, h) * src_linesize + av_clip(x + -x_pos, 0, w)];
+ const int ref3 = src_ptr[av_clip(y + y_pos, 0, h) * src_linesize + av_clip(x + -x_pos, 0, w)];
+ const int src0 = src_ptr[y * src_linesize + x];
+
+ if (s->blur) {
+ const int avg = get_avg(ref0, ref1, ref2, ref3);
+ const int diff = FFABS(src0 - avg);
+
+ dst_ptr[y * dst_linesize + x] = diff < thr ? avg : src0;
+ } else {
+ dst_ptr[y * dst_linesize + x] = (FFABS(src0 - ref0) < thr) &&
+ (FFABS(src0 - ref1) < thr) &&
+ (FFABS(src0 - ref2) < thr) &&
+ (FFABS(src0 - ref3) < thr) ? get_avg(ref0, ref1, ref2, ref3) : src0;
+ }
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int deband_16_c(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
+{
+ DebandContext *s = ctx->priv;
+ ThreadData *td = arg;
+ AVFrame *in = td->in;
+ AVFrame *out = td->out;
+ int x, y, p;
+
+ for (p = 0; p < s->nb_components; p++) {
+ const uint16_t *src_ptr = (const uint16_t *)in->data[p];
+ uint16_t *dst_ptr = (uint16_t *)out->data[p];
+ const int dst_linesize = out->linesize[p] / 2;
+ const int src_linesize = in->linesize[p] / 2;
+ const int thr = s->thr[p];
+ const int start = (s->planeheight[p] * jobnr ) / nb_jobs;
+ const int end = (s->planeheight[p] * (jobnr+1)) / nb_jobs;
+ const int w = s->planewidth[p] - 1;
+ const int h = s->planeheight[p] - 1;
+
+ for (y = start; y < end; y++) {
+ const int pos = y * s->planeheight[0];
+
+ for (x = 0; x < s->planewidth[p]; x++) {
+ const int x_pos = s->x_pos[pos + x];
+ const int y_pos = s->y_pos[pos + x];
+ const int ref0 = src_ptr[av_clip(y + y_pos, 0, h) * src_linesize + av_clip(x + x_pos, 0, w)];
+ const int ref1 = src_ptr[av_clip(y + -y_pos, 0, h) * src_linesize + av_clip(x + x_pos, 0, w)];
+ const int ref2 = src_ptr[av_clip(y + -y_pos, 0, h) * src_linesize + av_clip(x + -x_pos, 0, w)];
+ const int ref3 = src_ptr[av_clip(y + y_pos, 0, h) * src_linesize + av_clip(x + -x_pos, 0, w)];
+ const int src0 = src_ptr[y * src_linesize + x];
+
+ if (s->blur) {
+ const int avg = get_avg(ref0, ref1, ref2, ref3);
+ const int diff = FFABS(src0 - avg);
+
+ dst_ptr[y * dst_linesize + x] = diff < thr ? avg : src0;
+ } else {
+ dst_ptr[y * dst_linesize + x] = (FFABS(src0 - ref0) < thr) &&
+ (FFABS(src0 - ref1) < thr) &&
+ (FFABS(src0 - ref2) < thr) &&
+ (FFABS(src0 - ref3) < thr) ? get_avg(ref0, ref1, ref2, ref3) : src0;
+ }
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int config_input(AVFilterLink *inlink)
+{
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+ AVFilterContext *ctx = inlink->dst;
+ DebandContext *s = ctx->priv;
+ const float direction = s->direction;
+ const int range = s->range;
+ int x, y;
+
+ s->nb_components = desc->nb_components;
+
+ s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
+ s->planeheight[0] = s->planeheight[3] = inlink->h;
+ s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
+ s->planewidth[0] = s->planewidth[3] = inlink->w;
+
+ s->deband = desc->comp[0].depth > 8 ? deband_16_c : deband_8_c;
+
+ s->thr[0] = ((1 << desc->comp[0].depth) - 1) * s->threshold[0];
+ s->thr[1] = ((1 << desc->comp[1].depth) - 1) * s->threshold[1];
+ s->thr[2] = ((1 << desc->comp[2].depth) - 1) * s->threshold[2];
+ s->thr[3] = ((1 << desc->comp[3].depth) - 1) * s->threshold[3];
+
+ s->x_pos = av_malloc(s->planewidth[0] * s->planeheight[0] * sizeof(*s->x_pos));
+ s->y_pos = av_malloc(s->planewidth[0] * s->planeheight[0] * sizeof(*s->y_pos));
+ if (!s->x_pos || !s->y_pos)
+ return AVERROR(ENOMEM);
+
+ for (y = 0; y < s->planeheight[0]; y++) {
+ for (x = 0; x < s->planewidth[0]; x++) {
+ const float r = frand(x, y);
+ const float dir = direction < 0 ? -direction : r * direction;
+ const int dist = range < 0 ? -range : r * range;
+
+ s->x_pos[y * s->planeheight[0] + x] = cosf(dir) * dist;
+ s->y_pos[y * s->planeheight[0] + x] = sinf(dir) * dist;
+ }
+ }
+
+ return 0;
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *in)
+{
+ AVFilterContext *ctx = inlink->dst;
+ AVFilterLink *outlink = ctx->outputs[0];
+ DebandContext *s = ctx->priv;
+ AVFrame *out;
+ ThreadData td;
+
+ out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!out) {
+ av_frame_free(&in);
+ return AVERROR(ENOMEM);
+ }
+ av_frame_copy_props(out, in);
+
+ td.in = in; td.out = out;
+ ctx->internal->execute(ctx, s->deband, &td, NULL, FFMIN3(s->planeheight[1],
+ s->planeheight[2],
+ ctx->graph->nb_threads));
+
+ av_frame_free(&in);
+ return ff_filter_frame(outlink, out);
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ DebandContext *s = ctx->priv;
+
+ av_freep(&s->x_pos);
+ av_freep(&s->y_pos);
+}
+
+static const AVFilterPad avfilter_vf_deband_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_input,
+ .filter_frame = filter_frame,
+ },
+ { NULL }
+};
+
+static const AVFilterPad avfilter_vf_deband_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_deband = {
+ .name = "deband",
+ .description = NULL_IF_CONFIG_SMALL("Debands video."),
+ .priv_size = sizeof(DebandContext),
+ .priv_class = &deband_class,
+ .uninit = uninit,
+ .query_formats = query_formats,
+ .inputs = avfilter_vf_deband_inputs,
+ .outputs = avfilter_vf_deband_outputs,
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
+};
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