/* * Copyright (c) 2016 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/opt.h" #include "libavutil/imgutils.h" #include "avfilter.h" #include "formats.h" #include "internal.h" #include "video.h" typedef struct BPNContext { const AVClass *class; int bitplane; int filter; int nb_planes; int planeheight[4]; int planewidth[4]; int depth; } BPNContext; #define OFFSET(x) offsetof(BPNContext, x) #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM static const AVOption bitplanenoise_options[] = { { "bitplane", "set bit plane to use for measuring noise", OFFSET(bitplane), AV_OPT_TYPE_INT, {.i64=1}, 1, 16, FLAGS}, { "filter", "show noisy pixels", OFFSET(filter), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS}, { NULL } }; AVFILTER_DEFINE_CLASS(bitplanenoise); static int query_formats(AVFilterContext *ctx) { static const enum AVPixelFormat pixfmts[] = { AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV440P10, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV440P12, AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV444P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV420P16, 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_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 }; AVFilterFormats *formats = ff_make_format_list(pixfmts); if (!formats) return AVERROR(ENOMEM); return ff_set_common_formats(ctx, formats); } static int config_input(AVFilterLink *inlink) { const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); AVFilterContext *ctx = inlink->dst; BPNContext *s = ctx->priv; s->nb_planes = 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->depth = desc->comp[0].depth; return 0; } #define CHECK_BIT(x, a, b, c) { \ bit = (((val[(x)] & mask) == (val[(x) + (a)] & mask)) + \ ((val[(x)] & mask) == (val[(x) + (b)] & mask)) + \ ((val[(x)] & mask) == (val[(x) + (c)] & mask))) > 1; \ if (dst) \ dst[(x)] = factor * bit; \ stats[plane] += bit; } static int filter_frame(AVFilterLink *inlink, AVFrame *in) { AVFilterContext *ctx = inlink->dst; AVFilterLink *outlink = ctx->outputs[0]; BPNContext *s = ctx->priv; const int mask = (1 << (s->bitplane - 1)); const int factor = (1 << s->depth) - 1; float stats[4] = { 0 }; char metabuf[128]; int plane, y, x, bit; AVFrame *out = s->filter ? NULL : in; if (!out) { 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); } if (s->depth <= 8) { for (plane = 0; plane < s->nb_planes; plane++) { const int linesize = s->planeheight[plane] > 1 ? in->linesize[plane] : 0; const int dlinesize = out->linesize[plane]; uint8_t *val = in->data[plane]; uint8_t *dst = s->filter ? out->data[plane]: NULL; for (y = 0; y < s->planeheight[plane] - 1; y++) { CHECK_BIT(0, 1, 1 + linesize, linesize) for (x = 1; x < s->planewidth[plane] - 1; x++) { CHECK_BIT(x, -1, 1, linesize) } CHECK_BIT(x, -1, -1 + linesize, linesize) val += linesize; if (dst) dst += dlinesize; } CHECK_BIT(0, 1, 1 - linesize, -linesize) for (x = 1; x < s->planewidth[plane] - 1; x++) { CHECK_BIT(x, -1, 1, -linesize) } CHECK_BIT(x, -1, -1 - linesize, -linesize) } } else { for (plane = 0; plane < s->nb_planes; plane++) { const int linesize = s->planeheight[plane] > 1 ? in->linesize[plane] / 2 : 0; const int dlinesize = out->linesize[plane] / 2; uint16_t *val = (uint16_t *)in->data[plane]; uint16_t *dst = s->filter ? (uint16_t *)out->data[plane] : NULL; val = (uint16_t *)in->data[plane]; for (y = 0; y < s->planeheight[plane] - 1; y++) { CHECK_BIT(0, 1, 1 + linesize, linesize) for (x = 1; x < s->planewidth[plane] - 1; x++) { CHECK_BIT(x, -1, 1, linesize) } CHECK_BIT(x, -1, -1 + linesize, linesize) val += linesize; if (dst) dst += dlinesize; } CHECK_BIT(0, 1, 1 - linesize, -linesize) for (x = 1; x < s->planewidth[plane] - 1; x++) { CHECK_BIT(x, -1, 1, -linesize) } CHECK_BIT(x, -1, -1 -linesize, -linesize) } } for (plane = 0; plane < s->nb_planes; plane++) { char key[32]; stats[plane] /= s->planewidth[plane] * s->planeheight[plane]; snprintf(key, sizeof(key), "lavfi.bitplanenoise.%d.%d", plane, s->bitplane); snprintf(metabuf, sizeof(metabuf), "%f", 1. - 2.* fabs((stats[plane] - 0.5))); av_dict_set(&out->metadata, key, metabuf, 0); } if (out != in) av_frame_free(&in); return ff_filter_frame(outlink, out); } static const AVFilterPad inputs[] = { { .name = "default", .type = AVMEDIA_TYPE_VIDEO, .filter_frame = filter_frame, .config_props = config_input, }, { NULL } }; static const AVFilterPad outputs[] = { { .name = "default", .type = AVMEDIA_TYPE_VIDEO, }, { NULL } }; AVFilter ff_vf_bitplanenoise = { .name = "bitplanenoise", .description = NULL_IF_CONFIG_SMALL("Measure bit plane noise."), .priv_size = sizeof(BPNContext), .query_formats = query_formats, .inputs = inputs, .outputs = outputs, .priv_class = &bitplanenoise_class, .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, };