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Diffstat (limited to 'libavfilter/vf_deband.c')
-rw-r--r-- | libavfilter/vf_deband.c | 312 |
1 files changed, 312 insertions, 0 deletions
diff --git a/libavfilter/vf_deband.c b/libavfilter/vf_deband.c new file mode 100644 index 0000000..01728b1 --- /dev/null +++ b/libavfilter/vf_deband.c @@ -0,0 +1,312 @@ +/* + * 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, +}; |