390 lines
12 KiB
C
390 lines
12 KiB
C
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/*
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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/pixdesc.h"
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#include "libavutil/opt.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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#include "framesync.h"
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typedef struct MidEqualizerContext {
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const AVClass *class;
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int width[2][4], height[2][4];
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int nb_planes;
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int planes;
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int histogram_size;
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float *histogram[2];
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unsigned *cchange;
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FFFrameSync fs;
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void (*midequalizer)(const uint8_t *in0, const uint8_t *in1,
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uint8_t *dst,
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ptrdiff_t linesize1, ptrdiff_t linesize2,
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ptrdiff_t dlinesize,
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int w0, int h0,
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int w1, int h1,
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float *histogram1, float *histogram2,
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unsigned *cchange, size_t hsize);
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} MidEqualizerContext;
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#define OFFSET(x) offsetof(MidEqualizerContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption midequalizer_options[] = {
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{ "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(midequalizer);
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static int query_formats(AVFilterContext *ctx)
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{
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static const enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
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AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
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AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
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AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
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AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
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AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14,
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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_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12,
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AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
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AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14,
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AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
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AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
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AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
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AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12,
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AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
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AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
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AV_PIX_FMT_GBRP16, AV_PIX_FMT_GBRAP16,
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AV_PIX_FMT_GRAY16,
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AV_PIX_FMT_NONE
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};
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return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
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}
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static int process_frame(FFFrameSync *fs)
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{
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AVFilterContext *ctx = fs->parent;
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MidEqualizerContext *s = fs->opaque;
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AVFilterLink *outlink = ctx->outputs[0];
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AVFrame *out, *in0, *in1;
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int ret;
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if ((ret = ff_framesync_get_frame(&s->fs, 0, &in0, 0)) < 0 ||
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(ret = ff_framesync_get_frame(&s->fs, 1, &in1, 0)) < 0)
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return ret;
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if (ctx->is_disabled) {
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out = av_frame_clone(in0);
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if (!out)
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return AVERROR(ENOMEM);
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} else {
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int p;
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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, in0);
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for (p = 0; p < s->nb_planes; p++) {
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if (!((1 << p) & s->planes)) {
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av_image_copy_plane(out->data[p], out->linesize[p], in0->data[p], in0->linesize[p],
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s->width[0][p] * (1 + (s->histogram_size > 256)), s->height[0][p]);
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continue;
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}
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s->midequalizer(in0->data[p], in1->data[p],
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out->data[p],
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in0->linesize[p], in1->linesize[p],
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out->linesize[p],
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s->width[0][p], s->height[0][p],
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s->width[1][p], s->height[1][p],
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s->histogram[0], s->histogram[1],
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s->cchange, s->histogram_size);
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}
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}
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out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
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return ff_filter_frame(outlink, out);
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}
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static void compute_histogram8(const uint8_t *src, ptrdiff_t linesize,
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int w, int h, float *histogram, size_t hsize)
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{
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int y, x;
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memset(histogram, 0, hsize * sizeof(*histogram));
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for (y = 0; y < h; y++) {
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for (x = 0; x < w; x++) {
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histogram[src[x]] += 1;
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}
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src += linesize;
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}
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for (x = 0; x < hsize - 1; x++) {
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histogram[x + 1] += histogram[x];
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histogram[x] /= hsize;
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}
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histogram[x] /= hsize;
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}
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static void compute_histogram16(const uint16_t *src, ptrdiff_t linesize,
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int w, int h, float *histogram, size_t hsize)
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{
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int y, x;
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memset(histogram, 0, hsize * sizeof(*histogram));
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for (y = 0; y < h; y++) {
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for (x = 0; x < w; x++) {
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histogram[src[x]] += 1;
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}
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src += linesize;
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}
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for (x = 0; x < hsize - 1; x++) {
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histogram[x + 1] += histogram[x];
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histogram[x] /= hsize;
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}
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histogram[x] /= hsize;
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}
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static void compute_contrast_change(float *histogram1, float *histogram2,
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unsigned *cchange, size_t hsize)
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{
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int i;
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for (i = 0; i < hsize; i++) {
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int j;
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for (j = 0; j < hsize && histogram2[j] < histogram1[i]; j++);
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cchange[i] = (i + j) / 2;
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}
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}
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static void midequalizer8(const uint8_t *in0, const uint8_t *in1,
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uint8_t *dst,
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ptrdiff_t linesize1, ptrdiff_t linesize2,
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ptrdiff_t dlinesize,
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int w0, int h0,
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int w1, int h1,
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float *histogram1, float *histogram2,
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unsigned *cchange,
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size_t hsize)
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{
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int x, y;
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compute_histogram8(in0, linesize1, w0, h0, histogram1, hsize);
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compute_histogram8(in1, linesize2, w1, h1, histogram2, hsize);
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compute_contrast_change(histogram1, histogram2, cchange, hsize);
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for (y = 0; y < h0; y++) {
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for (x = 0; x < w0; x++) {
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dst[x] = av_clip_uint8(cchange[in0[x]]);
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}
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dst += dlinesize;
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in0 += linesize1;
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}
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}
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static void midequalizer16(const uint8_t *in0, const uint8_t *in1,
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uint8_t *dst,
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ptrdiff_t linesize1, ptrdiff_t linesize2,
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ptrdiff_t dlinesize,
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int w0, int h0,
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int w1, int h1,
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float *histogram1, float *histogram2,
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unsigned *cchange,
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size_t hsize)
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{
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const uint16_t *i = (const uint16_t *)in0;
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uint16_t *d = (uint16_t *)dst;
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int x, y;
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compute_histogram16(i, linesize1 / 2, w0, h0, histogram1, hsize);
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compute_histogram16((const uint16_t *)in1, linesize2 / 2, w1, h1, histogram2, hsize);
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compute_contrast_change(histogram1, histogram2, cchange, hsize);
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for (y = 0; y < h0; y++) {
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for (x = 0; x < w0; x++) {
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d[x] = cchange[i[x]];
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}
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d += dlinesize / 2;
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i += linesize1 / 2;
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}
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}
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static int config_input0(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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MidEqualizerContext *s = ctx->priv;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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int vsub, hsub;
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s->nb_planes = av_pix_fmt_count_planes(inlink->format);
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hsub = desc->log2_chroma_w;
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vsub = desc->log2_chroma_h;
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s->height[0][0] = s->height[0][3] = inlink->h;
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s->width[0][0] = s->width[0][3] = inlink->w;
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s->height[0][1] = s->height[0][2] = AV_CEIL_RSHIFT(inlink->h, vsub);
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s->width[0][1] = s->width[0][2] = AV_CEIL_RSHIFT(inlink->w, hsub);
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s->histogram_size = 1 << desc->comp[0].depth;
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s->histogram[0] = av_calloc(s->histogram_size, sizeof(float));
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s->histogram[1] = av_calloc(s->histogram_size, sizeof(float));
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s->cchange = av_calloc(s->histogram_size, sizeof(unsigned));
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if (!s->histogram[0] || !s->histogram[1] || !s->cchange)
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return AVERROR(ENOMEM);
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if (s->histogram_size == 256) {
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s->midequalizer = midequalizer8;
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} else {
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s->midequalizer = midequalizer16;
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}
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return 0;
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}
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static int config_input1(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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MidEqualizerContext *s = ctx->priv;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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int vsub, hsub;
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s->nb_planes = av_pix_fmt_count_planes(inlink->format);
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hsub = desc->log2_chroma_w;
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vsub = desc->log2_chroma_h;
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s->height[1][0] = s->height[1][3] = inlink->h;
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s->width[1][0] = s->width[1][3] = inlink->w;
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s->height[1][1] = s->height[1][2] = AV_CEIL_RSHIFT(inlink->h, vsub);
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s->width[1][1] = s->width[1][2] = AV_CEIL_RSHIFT(inlink->w, hsub);
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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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MidEqualizerContext *s = ctx->priv;
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AVFilterLink *in0 = ctx->inputs[0];
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AVFilterLink *in1 = ctx->inputs[1];
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FFFrameSyncIn *in;
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int ret;
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if (in0->format != in1->format) {
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av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
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return AVERROR(EINVAL);
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}
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outlink->w = in0->w;
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outlink->h = in0->h;
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outlink->sample_aspect_ratio = in0->sample_aspect_ratio;
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outlink->frame_rate = in0->frame_rate;
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if ((ret = ff_framesync_init(&s->fs, ctx, 2)) < 0)
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return ret;
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in = s->fs.in;
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in[0].time_base = in0->time_base;
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in[1].time_base = in1->time_base;
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in[0].sync = 1;
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in[0].before = EXT_STOP;
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in[0].after = EXT_INFINITY;
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in[1].sync = 1;
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in[1].before = EXT_STOP;
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in[1].after = EXT_INFINITY;
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s->fs.opaque = s;
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s->fs.on_event = process_frame;
|
||
|
|
|
||
|
|
ret = ff_framesync_configure(&s->fs);
|
||
|
|
outlink->time_base = s->fs.time_base;
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int activate(AVFilterContext *ctx)
|
||
|
|
{
|
||
|
|
MidEqualizerContext *s = ctx->priv;
|
||
|
|
return ff_framesync_activate(&s->fs);
|
||
|
|
}
|
||
|
|
|
||
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
||
|
|
{
|
||
|
|
MidEqualizerContext *s = ctx->priv;
|
||
|
|
|
||
|
|
ff_framesync_uninit(&s->fs);
|
||
|
|
av_freep(&s->histogram[0]);
|
||
|
|
av_freep(&s->histogram[1]);
|
||
|
|
av_freep(&s->cchange);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const AVFilterPad midequalizer_inputs[] = {
|
||
|
|
{
|
||
|
|
.name = "in0",
|
||
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
||
|
|
.config_props = config_input0,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "in1",
|
||
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
||
|
|
.config_props = config_input1,
|
||
|
|
},
|
||
|
|
{ NULL }
|
||
|
|
};
|
||
|
|
|
||
|
|
static const AVFilterPad midequalizer_outputs[] = {
|
||
|
|
{
|
||
|
|
.name = "default",
|
||
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
||
|
|
.config_props = config_output,
|
||
|
|
},
|
||
|
|
{ NULL }
|
||
|
|
};
|
||
|
|
|
||
|
|
AVFilter ff_vf_midequalizer = {
|
||
|
|
.name = "midequalizer",
|
||
|
|
.description = NULL_IF_CONFIG_SMALL("Apply Midway Equalization."),
|
||
|
|
.priv_size = sizeof(MidEqualizerContext),
|
||
|
|
.uninit = uninit,
|
||
|
|
.query_formats = query_formats,
|
||
|
|
.activate = activate,
|
||
|
|
.inputs = midequalizer_inputs,
|
||
|
|
.outputs = midequalizer_outputs,
|
||
|
|
.priv_class = &midequalizer_class,
|
||
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
|
||
|
|
};
|