mirror of
https://github.com/FFmpeg/FFmpeg.git
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472 lines
13 KiB
C
472 lines
13 KiB
C
/*
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* Copyright (c) 2017 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/opt.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/qsort.h"
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#include "avfilter.h"
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#define FF_BUFQUEUE_SIZE 129
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#include "bufferqueue.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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#define SIZE FF_BUFQUEUE_SIZE
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enum smooth_mode {
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ARITHMETIC_MEAN,
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GEOMETRIC_MEAN,
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HARMONIC_MEAN,
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QUADRATIC_MEAN,
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CUBIC_MEAN,
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POWER_MEAN,
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MEDIAN,
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NB_SMOOTH_MODE,
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};
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typedef struct DeflickerContext {
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const AVClass *class;
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int size;
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int mode;
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int bypass;
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int eof;
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int depth;
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int nb_planes;
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int planewidth[4];
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int planeheight[4];
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uint64_t *histogram;
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float luminance[SIZE];
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float sorted[SIZE];
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struct FFBufQueue q;
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int available;
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void (*get_factor)(AVFilterContext *ctx, float *f);
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float (*calc_avgy)(AVFilterContext *ctx, AVFrame *in);
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int (*deflicker)(AVFilterContext *ctx, const uint8_t *src, ptrdiff_t src_linesize,
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uint8_t *dst, ptrdiff_t dst_linesize, int w, int h, float f);
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} DeflickerContext;
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#define OFFSET(x) offsetof(DeflickerContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
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static const AVOption deflicker_options[] = {
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{ "size", "set how many frames to use", OFFSET(size), AV_OPT_TYPE_INT, {.i64=5}, 2, SIZE, FLAGS },
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{ "s", "set how many frames to use", OFFSET(size), AV_OPT_TYPE_INT, {.i64=5}, 2, SIZE, FLAGS },
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{ "mode", "set how to smooth luminance", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, NB_SMOOTH_MODE-1, FLAGS, "mode" },
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{ "m", "set how to smooth luminance", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, NB_SMOOTH_MODE-1, FLAGS, "mode" },
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{ "am", "arithmetic mean", 0, AV_OPT_TYPE_CONST, {.i64=ARITHMETIC_MEAN}, 0, 0, FLAGS, "mode" },
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{ "gm", "geometric mean", 0, AV_OPT_TYPE_CONST, {.i64=GEOMETRIC_MEAN}, 0, 0, FLAGS, "mode" },
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{ "hm", "harmonic mean", 0, AV_OPT_TYPE_CONST, {.i64=HARMONIC_MEAN}, 0, 0, FLAGS, "mode" },
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{ "qm", "quadratic mean", 0, AV_OPT_TYPE_CONST, {.i64=QUADRATIC_MEAN}, 0, 0, FLAGS, "mode" },
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{ "cm", "cubic mean", 0, AV_OPT_TYPE_CONST, {.i64=CUBIC_MEAN}, 0, 0, FLAGS, "mode" },
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{ "pm", "power mean", 0, AV_OPT_TYPE_CONST, {.i64=POWER_MEAN}, 0, 0, FLAGS, "mode" },
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{ "median", "median", 0, AV_OPT_TYPE_CONST, {.i64=MEDIAN}, 0, 0, FLAGS, "mode" },
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{ "bypass", "leave frames unchanged", OFFSET(bypass), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(deflicker);
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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, AV_PIX_FMT_GRAY10,
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AV_PIX_FMT_GRAY12, 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_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 int deflicker8(AVFilterContext *ctx,
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const uint8_t *src, ptrdiff_t src_linesize,
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uint8_t *dst, ptrdiff_t dst_linesize,
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int w, int h, float f)
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{
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int x, y;
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for (y = 0; y < h; y++) {
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for (x = 0; x < w; x++) {
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dst[x] = av_clip_uint8(src[x] * f);
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}
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dst += dst_linesize;
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src += src_linesize;
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}
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return 0;
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}
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static int deflicker16(AVFilterContext *ctx,
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const uint8_t *ssrc, ptrdiff_t src_linesize,
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uint8_t *ddst, ptrdiff_t dst_linesize,
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int w, int h, float f)
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{
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DeflickerContext *s = ctx->priv;
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const uint16_t *src = (const uint16_t *)ssrc;
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uint16_t *dst = (uint16_t *)ddst;
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const int max = (1 << s->depth) - 1;
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int x, y;
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for (y = 0; y < h; y++) {
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for (x = 0; x < w; x++) {
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dst[x] = av_clip(src[x] * f, 0, max);
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}
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dst += dst_linesize / 2;
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src += src_linesize / 2;
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}
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return 0;
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}
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static float calc_avgy8(AVFilterContext *ctx, AVFrame *in)
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{
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DeflickerContext *s = ctx->priv;
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const uint8_t *src = in->data[0];
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int64_t sum = 0;
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int y, x;
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memset(s->histogram, 0, (1 << s->depth) * sizeof(*s->histogram));
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for (y = 0; y < s->planeheight[0]; y++) {
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for (x = 0; x < s->planewidth[0]; x++) {
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s->histogram[src[x]]++;
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}
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src += in->linesize[0];
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}
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for (y = 0; y < 1 << s->depth; y++) {
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sum += s->histogram[y] * y;
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}
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return 1.0f * sum / (s->planeheight[0] * s->planewidth[0]);
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}
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static float calc_avgy16(AVFilterContext *ctx, AVFrame *in)
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{
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DeflickerContext *s = ctx->priv;
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const uint16_t *src = (const uint16_t *)in->data[0];
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int64_t sum = 0;
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int y, x;
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memset(s->histogram, 0, (1 << s->depth) * sizeof(*s->histogram));
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for (y = 0; y < s->planeheight[0]; y++) {
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for (x = 0; x < s->planewidth[0]; x++) {
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s->histogram[src[x]]++;
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}
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src += in->linesize[0] / 2;
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}
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for (y = 0; y < 1 << s->depth; y++) {
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sum += s->histogram[y] * y;
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}
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return 1.0f * sum / (s->planeheight[0] * s->planewidth[0]);
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}
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static void get_am_factor(AVFilterContext *ctx, float *f)
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{
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DeflickerContext *s = ctx->priv;
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int y;
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*f = 0.0f;
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for (y = 0; y < s->size; y++) {
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*f += s->luminance[y];
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}
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*f /= s->size;
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*f /= s->luminance[0];
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}
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static void get_gm_factor(AVFilterContext *ctx, float *f)
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{
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DeflickerContext *s = ctx->priv;
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int y;
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*f = 1;
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for (y = 0; y < s->size; y++) {
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*f *= s->luminance[y];
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}
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*f = pow(*f, 1.0f / s->size);
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*f /= s->luminance[0];
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}
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static void get_hm_factor(AVFilterContext *ctx, float *f)
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{
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DeflickerContext *s = ctx->priv;
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int y;
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*f = 0.0f;
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for (y = 0; y < s->size; y++) {
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*f += 1.0f / s->luminance[y];
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}
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*f = s->size / *f;
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*f /= s->luminance[0];
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}
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static void get_qm_factor(AVFilterContext *ctx, float *f)
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{
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DeflickerContext *s = ctx->priv;
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int y;
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*f = 0.0f;
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for (y = 0; y < s->size; y++) {
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*f += s->luminance[y] * s->luminance[y];
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}
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*f /= s->size;
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*f = sqrtf(*f);
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*f /= s->luminance[0];
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}
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static void get_cm_factor(AVFilterContext *ctx, float *f)
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{
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DeflickerContext *s = ctx->priv;
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int y;
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*f = 0.0f;
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for (y = 0; y < s->size; y++) {
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*f += s->luminance[y] * s->luminance[y] * s->luminance[y];
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}
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*f /= s->size;
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*f = cbrtf(*f);
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*f /= s->luminance[0];
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}
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static void get_pm_factor(AVFilterContext *ctx, float *f)
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{
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DeflickerContext *s = ctx->priv;
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int y;
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*f = 0.0f;
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for (y = 0; y < s->size; y++) {
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*f += powf(s->luminance[y], s->size);
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}
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*f /= s->size;
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*f = powf(*f, 1.0f / s->size);
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*f /= s->luminance[0];
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}
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static int comparef(const void *a, const void *b)
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{
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const float *aa = a, *bb = b;
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return round(aa - bb);
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}
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static void get_median_factor(AVFilterContext *ctx, float *f)
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{
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DeflickerContext *s = ctx->priv;
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memcpy(s->sorted, s->luminance, sizeof(s->sorted));
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AV_QSORT(s->sorted, s->size, float, comparef);
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*f = s->sorted[s->size >> 1] / s->luminance[0];
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}
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static int config_input(AVFilterLink *inlink)
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{
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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AVFilterContext *ctx = inlink->dst;
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DeflickerContext *s = ctx->priv;
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s->nb_planes = desc->nb_components;
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s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
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s->planeheight[0] = s->planeheight[3] = inlink->h;
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s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
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s->planewidth[0] = s->planewidth[3] = inlink->w;
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s->depth = desc->comp[0].depth;
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if (s->depth == 8) {
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s->deflicker = deflicker8;
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s->calc_avgy = calc_avgy8;
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} else {
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s->deflicker = deflicker16;
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s->calc_avgy = calc_avgy16;
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}
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s->histogram = av_calloc(1 << s->depth, sizeof(*s->histogram));
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if (!s->histogram)
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return AVERROR(ENOMEM);
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switch (s->mode) {
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case MEDIAN: s->get_factor = get_median_factor; break;
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case ARITHMETIC_MEAN: s->get_factor = get_am_factor; break;
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case GEOMETRIC_MEAN: s->get_factor = get_gm_factor; break;
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case HARMONIC_MEAN: s->get_factor = get_hm_factor; break;
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case QUADRATIC_MEAN: s->get_factor = get_qm_factor; break;
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case CUBIC_MEAN: s->get_factor = get_cm_factor; break;
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case POWER_MEAN: s->get_factor = get_pm_factor; break;
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}
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return 0;
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
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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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DeflickerContext *s = ctx->priv;
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AVDictionary **metadata;
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AVFrame *out, *in;
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float f;
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int y;
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if (s->q.available < s->size && !s->eof) {
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s->luminance[s->available] = s->calc_avgy(ctx, buf);
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ff_bufqueue_add(ctx, &s->q, buf);
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s->available++;
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return 0;
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}
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in = ff_bufqueue_peek(&s->q, 0);
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out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!out) {
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av_frame_free(&buf);
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return AVERROR(ENOMEM);
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}
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s->get_factor(ctx, &f);
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if (!s->bypass)
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s->deflicker(ctx, in->data[0], in->linesize[0], out->data[0], out->linesize[0],
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outlink->w, outlink->h, f);
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for (y = 1 - s->bypass; y < s->nb_planes; y++) {
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av_image_copy_plane(out->data[y], out->linesize[y],
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in->data[y], in->linesize[y],
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s->planewidth[y] * (1 + (s->depth > 8)), s->planeheight[y]);
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}
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av_frame_copy_props(out, in);
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metadata = &out->metadata;
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if (metadata) {
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uint8_t value[128];
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snprintf(value, sizeof(value), "%f", s->luminance[0]);
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av_dict_set(metadata, "lavfi.deflicker.luminance", value, 0);
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snprintf(value, sizeof(value), "%f", s->luminance[0] * f);
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av_dict_set(metadata, "lavfi.deflicker.new_luminance", value, 0);
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snprintf(value, sizeof(value), "%f", f - 1.0f);
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av_dict_set(metadata, "lavfi.deflicker.relative_change", value, 0);
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}
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in = ff_bufqueue_get(&s->q);
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av_frame_free(&in);
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memmove(&s->luminance[0], &s->luminance[1], sizeof(*s->luminance) * (s->size - 1));
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s->luminance[s->available - 1] = s->calc_avgy(ctx, buf);
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ff_bufqueue_add(ctx, &s->q, buf);
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return ff_filter_frame(outlink, out);
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}
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static int request_frame(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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DeflickerContext *s = ctx->priv;
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int ret;
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ret = ff_request_frame(ctx->inputs[0]);
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if (ret == AVERROR_EOF && s->available > 0) {
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AVFrame *buf = av_frame_clone(ff_bufqueue_peek(&s->q, s->size - 1));
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if (!buf)
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return AVERROR(ENOMEM);
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s->eof = 1;
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ret = filter_frame(ctx->inputs[0], buf);
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s->available--;
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}
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return ret;
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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DeflickerContext *s = ctx->priv;
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ff_bufqueue_discard_all(&s->q);
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av_freep(&s->histogram);
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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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.config_props = config_input,
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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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.request_frame = request_frame,
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},
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{ NULL }
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};
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AVFilter ff_vf_deflicker = {
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.name = "deflicker",
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.description = NULL_IF_CONFIG_SMALL("Remove temporal frame luminance variations."),
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.priv_size = sizeof(DeflickerContext),
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.priv_class = &deflicker_class,
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.uninit = uninit,
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.query_formats = query_formats,
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.inputs = inputs,
|
|
.outputs = outputs,
|
|
};
|