mirror of https://github.com/FFmpeg/FFmpeg.git
Paul B Mahol
12 years ago
parent
3e9c0217fd
commit
449cdd547b
6 changed files with 257 additions and 2 deletions
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/*
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* Copyright (c) 2013 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/opt.h" |
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#include "libavutil/pixdesc.h" |
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#include "avfilter.h" |
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#include "drawutils.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 R 0 |
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#define G 1 |
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#define B 2 |
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#define A 3 |
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typedef struct { |
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double shadows; |
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double midtones; |
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double highlights; |
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} Range; |
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typedef struct { |
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const AVClass *class; |
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Range cyan_red; |
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Range magenta_green; |
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Range yellow_blue; |
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uint8_t lut[3][256]; |
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uint8_t rgba_map[4]; |
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int step; |
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} ColorBalanceContext; |
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#define OFFSET(x) offsetof(ColorBalanceContext, x) |
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
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static const AVOption colorbalance_options[] = { |
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{ "rs", "set red shadows", OFFSET(cyan_red.shadows), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, |
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{ "gs", "set green shadows", OFFSET(magenta_green.shadows), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, |
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{ "bs", "set blue shadows", OFFSET(yellow_blue.shadows), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, |
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{ "rm", "set red midtones", OFFSET(cyan_red.midtones), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, |
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{ "gm", "set green midtones", OFFSET(magenta_green.midtones), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, |
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{ "bm", "set blue midtones", OFFSET(yellow_blue.midtones), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, |
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{ "rh", "set red highlights", OFFSET(cyan_red.highlights), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, |
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{ "gh", "set green highlights", OFFSET(magenta_green.highlights), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, |
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{ "bh", "set blue highlights", OFFSET(yellow_blue.highlights), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, |
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{ NULL } |
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}; |
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AVFILTER_DEFINE_CLASS(colorbalance); |
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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_RGB24, AV_PIX_FMT_BGR24, |
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AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA, |
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AV_PIX_FMT_ABGR, AV_PIX_FMT_ARGB, |
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AV_PIX_FMT_0BGR, AV_PIX_FMT_0RGB, |
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AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0, |
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AV_PIX_FMT_NONE |
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}; |
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ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); |
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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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ColorBalanceContext *cb = ctx->priv; |
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format); |
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double *shadows, *midtones, *highlights, *buffer; |
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int i, r, g, b; |
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buffer = av_malloc(256 * 3 * sizeof(*buffer)); |
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if (!buffer) |
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return AVERROR(ENOMEM); |
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shadows = buffer + 256 * 0; |
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midtones = buffer + 256 * 1; |
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highlights = buffer + 256 * 2; |
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for (i = 0; i < 256; i++) { |
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double low = av_clipd((i - 85.0) / -64.0 + 0.5, 0, 1) * 178.5; |
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double mid = av_clipd((i - 85.0) / 64.0 + 0.5, 0, 1) * |
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av_clipd((i + 85.0 - 255.0) / -64.0 + 0.5, 0, 1) * 178.5; |
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shadows[i] = low; |
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midtones[i] = mid; |
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highlights[255 - i] = low; |
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} |
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for (i = 0; i < 256; i++) { |
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r = g = b = i; |
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r = av_clip_uint8(r + cb->cyan_red.shadows * shadows[r]); |
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r = av_clip_uint8(r + cb->cyan_red.midtones * midtones[r]); |
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r = av_clip_uint8(r + cb->cyan_red.highlights * highlights[r]); |
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g = av_clip_uint8(g + cb->magenta_green.shadows * shadows[g]); |
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g = av_clip_uint8(g + cb->magenta_green.midtones * midtones[g]); |
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g = av_clip_uint8(g + cb->magenta_green.highlights * highlights[g]); |
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b = av_clip_uint8(b + cb->yellow_blue.shadows * shadows[b]); |
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b = av_clip_uint8(b + cb->yellow_blue.midtones * midtones[b]); |
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b = av_clip_uint8(b + cb->yellow_blue.highlights * highlights[b]); |
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cb->lut[R][i] = r; |
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cb->lut[G][i] = g; |
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cb->lut[B][i] = b; |
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} |
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av_free(buffer); |
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ff_fill_rgba_map(cb->rgba_map, outlink->format); |
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cb->step = av_get_padded_bits_per_pixel(desc) >> 3; |
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return 0; |
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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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ColorBalanceContext *cb = ctx->priv; |
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AVFilterLink *outlink = ctx->outputs[0]; |
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const uint8_t roffset = cb->rgba_map[R]; |
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const uint8_t goffset = cb->rgba_map[G]; |
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const uint8_t boffset = cb->rgba_map[B]; |
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const uint8_t aoffset = cb->rgba_map[A]; |
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const int step = cb->step; |
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const uint8_t *srcrow = in->data[0]; |
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uint8_t *dstrow; |
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AVFrame *out; |
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int i, j; |
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if (av_frame_is_writable(in)) { |
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out = in; |
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} else { |
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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(&in); |
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return AVERROR(ENOMEM); |
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} |
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av_frame_copy_props(out, in); |
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} |
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dstrow = out->data[0]; |
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for (i = 0; i < outlink->h; i++) { |
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const uint8_t *src = srcrow; |
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uint8_t *dst = dstrow; |
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for (j = 0; j < outlink->w * step; j += step) { |
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dst[j + roffset] = cb->lut[R][src[j + roffset]]; |
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dst[j + goffset] = cb->lut[G][src[j + goffset]]; |
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dst[j + boffset] = cb->lut[B][src[j + boffset]]; |
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if (in != out && step == 4) |
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dst[j + aoffset] = src[j + aoffset]; |
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} |
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srcrow += in->linesize[0]; |
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dstrow += out->linesize[0]; |
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} |
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if (in != out) |
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av_frame_free(&in); |
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return ff_filter_frame(ctx->outputs[0], out); |
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} |
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static const AVFilterPad colorbalance_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 colorbalance_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 avfilter_vf_colorbalance = { |
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.name = "colorbalance", |
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.description = NULL_IF_CONFIG_SMALL("Adjust the color balance."), |
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.priv_size = sizeof(ColorBalanceContext), |
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.priv_class = &colorbalance_class, |
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.query_formats = query_formats, |
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.inputs = colorbalance_inputs, |
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.outputs = colorbalance_outputs, |
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}; |
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