From 4a69cd4e4eba490b7e1ce33b45662e26d87a6a18 Mon Sep 17 00:00:00 2001 From: Paul B Mahol Date: Wed, 3 Mar 2021 15:21:04 +0100 Subject: avfilter: add identity video filter --- libavfilter/vf_identity.c | 372 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 372 insertions(+) create mode 100644 libavfilter/vf_identity.c (limited to 'libavfilter/vf_identity.c') diff --git a/libavfilter/vf_identity.c b/libavfilter/vf_identity.c new file mode 100644 index 0000000000..02dda392b3 --- /dev/null +++ b/libavfilter/vf_identity.c @@ -0,0 +1,372 @@ +/* + * 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 + */ + +/** + * @file + * Caculate the Identity between two input videos. + */ + +#include "libavutil/avstring.h" +#include "libavutil/opt.h" +#include "libavutil/pixdesc.h" +#include "avfilter.h" +#include "drawutils.h" +#include "formats.h" +#include "framesync.h" +#include "internal.h" +#include "video.h" + +typedef struct IdentityContext { + const AVClass *class; + FFFrameSync fs; + double score, min_score, max_score, score_comp[4]; + uint64_t nb_frames; + int is_rgb; + uint8_t rgba_map[4]; + char comps[4]; + int nb_components; + int nb_threads; + int planewidth[4]; + int planeheight[4]; + uint64_t **scores; + unsigned (*filter_line)(const uint8_t *buf, const uint8_t *ref, int w); +} IdentityContext; + +#define OFFSET(x) offsetof(IdentityContext, x) +#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM + +static const AVOption identity_options[] = { + { NULL } +}; + +FRAMESYNC_DEFINE_CLASS(identity, IdentityContext, fs); + +static unsigned identity_line_8bit(const uint8_t *main_line, const uint8_t *ref_line, int outw) +{ + unsigned score = 0; + + for (int j = 0; j < outw; j++) + score += main_line[j] == ref_line[j]; + + return score; +} + +static unsigned identity_line_16bit(const uint8_t *mmain_line, const uint8_t *rref_line, int outw) +{ + const uint16_t *main_line = (const uint16_t *)mmain_line; + const uint16_t *ref_line = (const uint16_t *)rref_line; + unsigned score = 0; + + for (int j = 0; j < outw; j++) + score += main_line[j] == ref_line[j]; + + return score; +} + +typedef struct ThreadData { + const uint8_t *main_data[4]; + const uint8_t *ref_data[4]; + int main_linesize[4]; + int ref_linesize[4]; + int planewidth[4]; + int planeheight[4]; + uint64_t **score; + int nb_components; +} ThreadData; + +static +int compute_images_identity(AVFilterContext *ctx, void *arg, + int jobnr, int nb_jobs) +{ + IdentityContext *s = ctx->priv; + ThreadData *td = arg; + uint64_t *score = td->score[jobnr]; + + for (int c = 0; c < td->nb_components; c++) { + const int outw = td->planewidth[c]; + const int outh = td->planeheight[c]; + const int slice_start = (outh * jobnr) / nb_jobs; + const int slice_end = (outh * (jobnr+1)) / nb_jobs; + const int ref_linesize = td->ref_linesize[c]; + const int main_linesize = td->main_linesize[c]; + const uint8_t *main_line = td->main_data[c] + main_linesize * slice_start; + const uint8_t *ref_line = td->ref_data[c] + ref_linesize * slice_start; + uint64_t m = 0; + + for (int i = slice_start; i < slice_end; i++) { + m += s->filter_line(main_line, ref_line, outw); + ref_line += ref_linesize; + main_line += main_linesize; + } + score[c] = m; + } + + return 0; +} + +static void set_meta(AVDictionary **metadata, const char *key, char comp, float d) +{ + char value[128]; + snprintf(value, sizeof(value), "%f", d); + if (comp) { + char key2[128]; + snprintf(key2, sizeof(key2), "%s%c", key, comp); + av_dict_set(metadata, key2, value, 0); + } else { + av_dict_set(metadata, key, value, 0); + } +} + +static int do_identity(FFFrameSync *fs) +{ + AVFilterContext *ctx = fs->parent; + IdentityContext *s = ctx->priv; + AVFrame *master, *ref; + double comp_identity[4], score = 0.; + uint64_t comp_sum[4] = { 0 }; + AVDictionary **metadata; + ThreadData td; + int ret; + + ret = ff_framesync_dualinput_get(fs, &master, &ref); + if (ret < 0) + return ret; + if (ctx->is_disabled || !ref) + return ff_filter_frame(ctx->outputs[0], master); + metadata = &master->metadata; + + td.nb_components = s->nb_components; + td.score = s->scores; + for (int c = 0; c < s->nb_components; c++) { + td.main_data[c] = master->data[c]; + td.ref_data[c] = ref->data[c]; + td.main_linesize[c] = master->linesize[c]; + td.ref_linesize[c] = ref->linesize[c]; + td.planewidth[c] = s->planewidth[c]; + td.planeheight[c] = s->planeheight[c]; + } + + ctx->internal->execute(ctx, compute_images_identity, &td, NULL, FFMIN(s->planeheight[1], s->nb_threads)); + + for (int j = 0; j < s->nb_threads; j++) { + for (int c = 0; c < s->nb_components; c++) + comp_sum[c] += s->scores[j][c]; + } + + for (int c = 0; c < s->nb_components; c++) + comp_identity[c] = comp_sum[c] / ((double)s->planewidth[c] * s->planeheight[c]); + + for (int c = 0; c < s->nb_components; c++) + score += comp_identity[c]; + score /= s->nb_components; + + s->min_score = FFMIN(s->min_score, score); + s->max_score = FFMAX(s->max_score, score); + + s->score += score; + + for (int j = 0; j < s->nb_components; j++) + s->score_comp[j] += comp_identity[j]; + s->nb_frames++; + + for (int j = 0; j < s->nb_components; j++) { + int c = s->is_rgb ? s->rgba_map[j] : j; + set_meta(metadata, "lavfi.identity.identity.", s->comps[j], comp_identity[c]); + } + set_meta(metadata, "lavfi.identity.identity_avg", 0, score); + + return ff_filter_frame(ctx->outputs[0], master); +} + +static av_cold int init(AVFilterContext *ctx) +{ + IdentityContext *s = ctx->priv; + + s->fs.on_event = do_identity; + + return 0; +} + +static int query_formats(AVFilterContext *ctx) +{ + static const enum AVPixelFormat pix_fmts[] = { + AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16, +#define PF_NOALPHA(suf) AV_PIX_FMT_YUV420##suf, AV_PIX_FMT_YUV422##suf, AV_PIX_FMT_YUV444##suf +#define PF_ALPHA(suf) AV_PIX_FMT_YUVA420##suf, AV_PIX_FMT_YUVA422##suf, AV_PIX_FMT_YUVA444##suf +#define PF(suf) PF_NOALPHA(suf), PF_ALPHA(suf) + PF(P), PF(P9), PF(P10), PF_NOALPHA(P12), PF_NOALPHA(P14), PF(P16), + AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, + AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, + AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P, + 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_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 int config_input_ref(AVFilterLink *inlink) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); + AVFilterContext *ctx = inlink->dst; + IdentityContext *s = ctx->priv; + + s->nb_threads = ff_filter_get_nb_threads(ctx); + s->nb_components = desc->nb_components; + if (ctx->inputs[0]->w != ctx->inputs[1]->w || + ctx->inputs[0]->h != ctx->inputs[1]->h) { + av_log(ctx, AV_LOG_ERROR, "Width and height of input videos must be same.\n"); + return AVERROR(EINVAL); + } + if (ctx->inputs[0]->format != ctx->inputs[1]->format) { + av_log(ctx, AV_LOG_ERROR, "Inputs must be of same pixel format.\n"); + return AVERROR(EINVAL); + } + + s->is_rgb = ff_fill_rgba_map(s->rgba_map, inlink->format) >= 0; + s->comps[0] = s->is_rgb ? 'R' : 'Y' ; + s->comps[1] = s->is_rgb ? 'G' : 'U' ; + s->comps[2] = s->is_rgb ? 'B' : 'V' ; + s->comps[3] = 'A'; + + 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->scores = av_calloc(s->nb_threads, sizeof(*s->scores)); + if (!s->scores) + return AVERROR(ENOMEM); + + for (int t = 0; t < s->nb_threads && s->scores; t++) { + s->scores[t] = av_calloc(s->nb_components, sizeof(*s->scores[0])); + if (!s->scores[t]) + return AVERROR(ENOMEM); + } + + s->min_score = +INFINITY; + s->max_score = -INFINITY; + + s->filter_line = desc->comp[0].depth > 8 ? identity_line_16bit : identity_line_8bit; + + return 0; +} + +static int config_output(AVFilterLink *outlink) +{ + AVFilterContext *ctx = outlink->src; + IdentityContext *s = ctx->priv; + AVFilterLink *mainlink = ctx->inputs[0]; + int ret; + + ret = ff_framesync_init_dualinput(&s->fs, ctx); + if (ret < 0) + return ret; + outlink->w = mainlink->w; + outlink->h = mainlink->h; + outlink->time_base = mainlink->time_base; + outlink->sample_aspect_ratio = mainlink->sample_aspect_ratio; + outlink->frame_rate = mainlink->frame_rate; + if ((ret = ff_framesync_configure(&s->fs)) < 0) + return ret; + + outlink->time_base = s->fs.time_base; + + if (av_cmp_q(mainlink->time_base, outlink->time_base) || + av_cmp_q(ctx->inputs[1]->time_base, outlink->time_base)) + av_log(ctx, AV_LOG_WARNING, "not matching timebases found between first input: %d/%d and second input %d/%d, results may be incorrect!\n", + mainlink->time_base.num, mainlink->time_base.den, + ctx->inputs[1]->time_base.num, ctx->inputs[1]->time_base.den); + + return 0; +} + +static int activate(AVFilterContext *ctx) +{ + IdentityContext *s = ctx->priv; + return ff_framesync_activate(&s->fs); +} + +static av_cold void uninit(AVFilterContext *ctx) +{ + IdentityContext *s = ctx->priv; + + if (s->nb_frames > 0) { + char buf[256]; + + buf[0] = 0; + for (int j = 0; j < s->nb_components; j++) { + int c = s->is_rgb ? s->rgba_map[j] : j; + av_strlcatf(buf, sizeof(buf), " %c:%f", s->comps[j], s->score_comp[c] / s->nb_frames); + } + + av_log(ctx, AV_LOG_INFO, "Identity%s average:%f min:%f max:%f\n", + buf, + s->score / s->nb_frames, + s->min_score, + s->max_score); + } + + ff_framesync_uninit(&s->fs); + for (int t = 0; t < s->nb_threads && s->scores; t++) + av_freep(&s->scores[t]); + av_freep(&s->scores); +} + +static const AVFilterPad identity_inputs[] = { + { + .name = "main", + .type = AVMEDIA_TYPE_VIDEO, + },{ + .name = "reference", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_input_ref, + }, + { NULL } +}; + +static const AVFilterPad identity_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_output, + }, + { NULL } +}; + +AVFilter ff_vf_identity = { + .name = "identity", + .description = NULL_IF_CONFIG_SMALL("Calculate the Identity between two video streams."), + .preinit = identity_framesync_preinit, + .init = init, + .uninit = uninit, + .query_formats = query_formats, + .activate = activate, + .priv_size = sizeof(IdentityContext), + .priv_class = &identity_class, + .inputs = identity_inputs, + .outputs = identity_outputs, + .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS, +}; -- cgit v1.2.3