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/* |
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* Copyright (c) 2018 Paul B Mahol |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/imgutils.h" |
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#include "libavutil/intreadwrite.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/pixdesc.h" |
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#include "avfilter.h" |
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#include "formats.h" |
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#include "internal.h" |
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#include "video.h" |
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typedef struct AmplifyContext { |
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const AVClass *class; |
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const AVPixFmtDescriptor *desc; |
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int radius; |
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float factor; |
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float threshold; |
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float tolerance; |
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int planes; |
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int llimit; |
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int hlimit; |
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int nb_inputs; |
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int nb_frames; |
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int depth; |
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int nb_planes; |
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int linesize[4]; |
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int height[4]; |
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AVFrame **frames; |
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} AmplifyContext; |
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static int query_formats(AVFilterContext *ctx) |
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{ |
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static const enum AVPixelFormat pixel_fmts[] = { |
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AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, |
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AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, |
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AV_PIX_FMT_GRAY16, |
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AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P, |
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, |
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AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P, |
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AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, |
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AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P, |
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AV_PIX_FMT_YUVJ411P, |
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AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9, |
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AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, |
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AV_PIX_FMT_YUV440P10, |
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AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12, |
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AV_PIX_FMT_YUV440P12, |
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AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14, |
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AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, |
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AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, |
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AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16, |
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AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P, |
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AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16, |
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AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16, |
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AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16, |
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AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16, |
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AV_PIX_FMT_NONE |
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}; |
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AVFilterFormats *formats = ff_make_format_list(pixel_fmts); |
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if (!formats) |
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return AVERROR(ENOMEM); |
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return ff_set_common_formats(ctx, formats); |
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} |
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static av_cold int init(AVFilterContext *ctx) |
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{ |
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AmplifyContext *s = ctx->priv; |
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s->nb_inputs = s->radius * 2 + 1; |
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s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames)); |
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if (!s->frames) |
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return AVERROR(ENOMEM); |
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return 0; |
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} |
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typedef struct ThreadData { |
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AVFrame **in, *out; |
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} ThreadData; |
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static int amplify_frame(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
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{ |
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AmplifyContext *s = ctx->priv; |
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ThreadData *td = arg; |
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AVFrame **in = td->in; |
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AVFrame *out = td->out; |
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const int radius = s->radius; |
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const int nb_inputs = s->nb_inputs; |
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const float threshold = s->threshold; |
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const float tolerance = s->tolerance; |
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const float factor = s->factor; |
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const int llimit = s->llimit; |
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const int hlimit = s->hlimit; |
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const int depth = s->depth; |
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int i, p, x, y; |
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if (s->depth <= 8) { |
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for (p = 0; p < s->nb_planes; p++) { |
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const int slice_start = (s->height[p] * jobnr) / nb_jobs; |
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const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs; |
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uint8_t *dst = out->data[p] + slice_start * out->linesize[p]; |
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if (!((1 << p) & s->planes)) { |
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av_image_copy_plane(dst, out->linesize[p], |
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in[radius]->data[p] + slice_start * in[radius]->linesize[p], |
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in[radius]->linesize[p], |
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s->linesize[p], slice_end - slice_start); |
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continue; |
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} |
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for (y = slice_start; y < slice_end; y++) { |
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for (x = 0; x < s->linesize[p]; x++) { |
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int src = in[radius]->data[p][y * in[radius]->linesize[p] + x]; |
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float diff, avg; |
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int sum = 0; |
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for (i = 0; i < nb_inputs; i++) { |
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sum += in[i]->data[p][y * in[i]->linesize[p] + x]; |
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} |
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avg = sum / (float)nb_inputs; |
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diff = src - avg; |
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if (fabsf(diff) < threshold && fabsf(diff) > tolerance) { |
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int amp; |
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if (diff < 0) { |
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amp = -FFMIN(FFABS(diff * factor), llimit); |
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} else { |
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amp = FFMIN(FFABS(diff * factor), hlimit); |
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} |
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dst[x] = av_clip_uint8(src + amp); |
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} else { |
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dst[x] = src; |
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} |
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} |
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dst += out->linesize[p]; |
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} |
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} |
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} else { |
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for (p = 0; p < s->nb_planes; p++) { |
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const int slice_start = (s->height[p] * jobnr) / nb_jobs; |
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const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs; |
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uint16_t *dst = (uint16_t *)(out->data[p] + slice_start * out->linesize[p]); |
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if (!((1 << p) & s->planes)) { |
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av_image_copy_plane((uint8_t *)dst, out->linesize[p], |
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in[radius]->data[p] + slice_start * in[radius]->linesize[p], |
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in[radius]->linesize[p], |
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s->linesize[p], slice_end - slice_start); |
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continue; |
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} |
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for (y = slice_start; y < slice_end; y++) { |
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for (x = 0; x < s->linesize[p] / 2; x++) { |
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int src = AV_RN16(in[radius]->data[p] + y * in[radius]->linesize[p] + x * 2); |
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float diff, avg; |
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int sum = 0; |
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for (i = 0; i < nb_inputs; i++) { |
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sum += AV_RN16(in[i]->data[p] + y * in[i]->linesize[p] + x * 2); |
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} |
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avg = sum / (float)nb_inputs; |
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diff = src - avg; |
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if (fabsf(diff) < threshold && fabsf(diff) > tolerance) { |
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int amp; |
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if (diff < 0) { |
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amp = -FFMIN(FFABS(diff * factor), llimit); |
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} else { |
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amp = FFMIN(FFABS(diff * factor), hlimit); |
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} |
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dst[x] = av_clip_uintp2_c(src + amp, depth); |
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} else { |
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dst[x] = src; |
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} |
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} |
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dst += out->linesize[p] / 2; |
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} |
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} |
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} |
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return 0; |
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} |
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static int config_output(AVFilterLink *outlink) |
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{ |
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AVFilterContext *ctx = outlink->src; |
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AmplifyContext *s = ctx->priv; |
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AVFilterLink *inlink = ctx->inputs[0]; |
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int ret; |
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s->desc = av_pix_fmt_desc_get(outlink->format); |
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if (!s->desc) |
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return AVERROR_BUG; |
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s->nb_planes = av_pix_fmt_count_planes(outlink->format); |
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s->depth = s->desc->comp[0].depth; |
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if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0) |
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return ret; |
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s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h); |
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s->height[0] = s->height[3] = inlink->h; |
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return 0; |
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} |
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static av_cold void uninit(AVFilterContext *ctx) |
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{ |
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AmplifyContext *s = ctx->priv; |
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int i; |
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if (s->frames) { |
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for (i = 0; i < s->nb_frames; i++) |
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av_frame_free(&s->frames[i]); |
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} |
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av_freep(&s->frames); |
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} |
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static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
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{ |
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AVFilterContext *ctx = inlink->dst; |
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AVFilterLink *outlink = ctx->outputs[0]; |
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AmplifyContext *s = ctx->priv; |
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ThreadData td; |
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AVFrame *out; |
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if (s->nb_frames < s->nb_inputs) { |
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s->frames[s->nb_frames] = in; |
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s->nb_frames++; |
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return 0; |
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} else { |
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av_frame_free(&s->frames[0]); |
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memmove(&s->frames[0], &s->frames[1], sizeof(*s->frames) * (s->nb_inputs - 1)); |
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s->frames[s->nb_inputs - 1] = in; |
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} |
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if (!ctx->is_disabled) { |
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out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
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if (!out) |
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return AVERROR(ENOMEM); |
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av_frame_copy_props(out, s->frames[0]); |
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td.out = out; |
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td.in = s->frames; |
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ctx->internal->execute(ctx, amplify_frame, &td, NULL, FFMIN(s->height[1], ff_filter_get_nb_threads(ctx))); |
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} else { |
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out = av_frame_clone(s->frames[s->radius]); |
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if (!out) |
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return AVERROR(ENOMEM); |
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out->pts = s->frames[0]->pts; |
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} |
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return ff_filter_frame(outlink, out); |
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} |
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#define OFFSET(x) offsetof(AmplifyContext, x) |
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM |
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#define VFT AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM |
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static const AVOption amplify_options[] = { |
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{ "radius", "set radius", OFFSET(radius), AV_OPT_TYPE_INT, {.i64=2}, 1, 63, .flags = FLAGS }, |
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{ "factor", "set factor", OFFSET(factor), AV_OPT_TYPE_FLOAT, {.dbl=2}, 0, UINT16_MAX, .flags = VFT }, |
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{ "threshold", "set threshold", OFFSET(threshold), AV_OPT_TYPE_FLOAT, {.dbl=10}, 0, UINT16_MAX, .flags = VFT }, |
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{ "tolerance", "set tolerance", OFFSET(tolerance), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, UINT16_MAX, .flags = VFT }, |
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{ "low", "set low limit for amplification", OFFSET(llimit), AV_OPT_TYPE_INT, {.i64=UINT16_MAX}, 0, UINT16_MAX, .flags = VFT }, |
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{ "high", "set high limit for amplification", OFFSET(hlimit), AV_OPT_TYPE_INT, {.i64=UINT16_MAX}, 0, UINT16_MAX, .flags = VFT }, |
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{ "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=7}, 0, 15, VFT }, |
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{ NULL }, |
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}; |
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static const AVFilterPad inputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.filter_frame = filter_frame, |
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}, |
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{ NULL } |
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}; |
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static const AVFilterPad outputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.config_props = config_output, |
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}, |
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{ NULL } |
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}; |
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AVFILTER_DEFINE_CLASS(amplify); |
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AVFilter ff_vf_amplify = { |
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.name = "amplify", |
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.description = NULL_IF_CONFIG_SMALL("Amplify changes between successive video frames."), |
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.priv_size = sizeof(AmplifyContext), |
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.priv_class = &lify_class, |
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.query_formats = query_formats, |
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.outputs = outputs, |
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.inputs = inputs, |
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.init = init, |
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.uninit = uninit, |
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS, |
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.process_command = ff_filter_process_command, |
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}; |