mirror of https://github.com/FFmpeg/FFmpeg.git
Paul B Mahol
8 years ago
parent
e477f09d0b
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6 changed files with 406 additions and 1 deletions
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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 "avfilter.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, |
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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_GBRAP10, AV_PIX_FMT_GBRAP12, |
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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(in0->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->time_base = in0->time_base; |
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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; |
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return ff_framesync_configure(&s->fs); |
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} |
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static int filter_frame(AVFilterLink *inlink, AVFrame *buf) |
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{ |
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MidEqualizerContext *s = inlink->dst->priv; |
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return ff_framesync_filter_frame(&s->fs, inlink, buf); |
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} |
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static int request_frame(AVFilterLink *outlink) |
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{ |
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MidEqualizerContext *s = outlink->src->priv; |
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return ff_framesync_request_frame(&s->fs, outlink); |
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} |
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static av_cold void uninit(AVFilterContext *ctx) |
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{ |
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MidEqualizerContext *s = ctx->priv; |
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ff_framesync_uninit(&s->fs); |
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av_freep(&s->histogram[0]); |
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av_freep(&s->histogram[1]); |
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av_freep(&s->cchange); |
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} |
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static const AVFilterPad midequalizer_inputs[] = { |
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{ |
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.name = "in0", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.filter_frame = filter_frame, |
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.config_props = config_input0, |
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}, |
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{ |
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.name = "in1", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.filter_frame = filter_frame, |
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.config_props = config_input1, |
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}, |
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{ NULL } |
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}; |
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static const AVFilterPad midequalizer_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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.request_frame = request_frame, |
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}, |
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{ NULL } |
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}; |
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AVFilter ff_vf_midequalizer = { |
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.name = "midequalizer", |
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.description = NULL_IF_CONFIG_SMALL("Apply Midway Equalization."), |
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.priv_size = sizeof(MidEqualizerContext), |
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.uninit = uninit, |
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.query_formats = query_formats, |
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.inputs = midequalizer_inputs, |
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.outputs = midequalizer_outputs, |
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.priv_class = &midequalizer_class, |
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL, |
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}; |
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