| 0,0 → 1,213 |
|---|
| /* |
| * Copyright (c) 2013 Paul B Mahol |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavutil/opt.h" |
| #include "libavutil/pixdesc.h" |
| #include "avfilter.h" |
| #include "drawutils.h" |
| #include "formats.h" |
| #include "internal.h" |
| #include "video.h" |
| |
| #define R 0 |
| #define G 1 |
| #define B 2 |
| #define A 3 |
| |
| typedef struct { |
| double shadows; |
| double midtones; |
| double highlights; |
| } Range; |
| |
| typedef struct { |
| const AVClass *class; |
| Range cyan_red; |
| Range magenta_green; |
| Range yellow_blue; |
| |
| uint8_t lut[3][256]; |
| |
| uint8_t rgba_map[4]; |
| int step; |
| } ColorBalanceContext; |
| |
| #define OFFSET(x) offsetof(ColorBalanceContext, x) |
| #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
| static const AVOption colorbalance_options[] = { |
| { "rs", "set red shadows", OFFSET(cyan_red.shadows), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, |
| { "gs", "set green shadows", OFFSET(magenta_green.shadows), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, |
| { "bs", "set blue shadows", OFFSET(yellow_blue.shadows), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, |
| { "rm", "set red midtones", OFFSET(cyan_red.midtones), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, |
| { "gm", "set green midtones", OFFSET(magenta_green.midtones), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, |
| { "bm", "set blue midtones", OFFSET(yellow_blue.midtones), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, |
| { "rh", "set red highlights", OFFSET(cyan_red.highlights), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, |
| { "gh", "set green highlights", OFFSET(magenta_green.highlights), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, |
| { "bh", "set blue highlights", OFFSET(yellow_blue.highlights), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, |
| { NULL } |
| }; |
| |
| AVFILTER_DEFINE_CLASS(colorbalance); |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| static const enum AVPixelFormat pix_fmts[] = { |
| AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24, |
| AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA, |
| AV_PIX_FMT_ABGR, AV_PIX_FMT_ARGB, |
| AV_PIX_FMT_0BGR, AV_PIX_FMT_0RGB, |
| AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0, |
| AV_PIX_FMT_NONE |
| }; |
| |
| ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); |
| return 0; |
| } |
| |
| static int config_output(AVFilterLink *outlink) |
| { |
| AVFilterContext *ctx = outlink->src; |
| ColorBalanceContext *cb = ctx->priv; |
| const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format); |
| double *shadows, *midtones, *highlights, *buffer; |
| int i, r, g, b; |
| |
| buffer = av_malloc(256 * 3 * sizeof(*buffer)); |
| if (!buffer) |
| return AVERROR(ENOMEM); |
| |
| shadows = buffer + 256 * 0; |
| midtones = buffer + 256 * 1; |
| highlights = buffer + 256 * 2; |
| |
| for (i = 0; i < 256; i++) { |
| double low = av_clipd((i - 85.0) / -64.0 + 0.5, 0, 1) * 178.5; |
| double mid = av_clipd((i - 85.0) / 64.0 + 0.5, 0, 1) * |
| av_clipd((i + 85.0 - 255.0) / -64.0 + 0.5, 0, 1) * 178.5; |
| |
| shadows[i] = low; |
| midtones[i] = mid; |
| highlights[255 - i] = low; |
| } |
| |
| for (i = 0; i < 256; i++) { |
| r = g = b = i; |
| |
| r = av_clip_uint8(r + cb->cyan_red.shadows * shadows[r]); |
| r = av_clip_uint8(r + cb->cyan_red.midtones * midtones[r]); |
| r = av_clip_uint8(r + cb->cyan_red.highlights * highlights[r]); |
| |
| g = av_clip_uint8(g + cb->magenta_green.shadows * shadows[g]); |
| g = av_clip_uint8(g + cb->magenta_green.midtones * midtones[g]); |
| g = av_clip_uint8(g + cb->magenta_green.highlights * highlights[g]); |
| |
| b = av_clip_uint8(b + cb->yellow_blue.shadows * shadows[b]); |
| b = av_clip_uint8(b + cb->yellow_blue.midtones * midtones[b]); |
| b = av_clip_uint8(b + cb->yellow_blue.highlights * highlights[b]); |
| |
| cb->lut[R][i] = r; |
| cb->lut[G][i] = g; |
| cb->lut[B][i] = b; |
| } |
| |
| av_free(buffer); |
| |
| ff_fill_rgba_map(cb->rgba_map, outlink->format); |
| cb->step = av_get_padded_bits_per_pixel(desc) >> 3; |
| |
| return 0; |
| } |
| |
| static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| ColorBalanceContext *cb = ctx->priv; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| const uint8_t roffset = cb->rgba_map[R]; |
| const uint8_t goffset = cb->rgba_map[G]; |
| const uint8_t boffset = cb->rgba_map[B]; |
| const uint8_t aoffset = cb->rgba_map[A]; |
| const int step = cb->step; |
| const uint8_t *srcrow = in->data[0]; |
| uint8_t *dstrow; |
| AVFrame *out; |
| int i, j; |
| |
| if (av_frame_is_writable(in)) { |
| out = in; |
| } else { |
| out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
| if (!out) { |
| av_frame_free(&in); |
| return AVERROR(ENOMEM); |
| } |
| av_frame_copy_props(out, in); |
| } |
| |
| dstrow = out->data[0]; |
| for (i = 0; i < outlink->h; i++) { |
| const uint8_t *src = srcrow; |
| uint8_t *dst = dstrow; |
| |
| for (j = 0; j < outlink->w * step; j += step) { |
| dst[j + roffset] = cb->lut[R][src[j + roffset]]; |
| dst[j + goffset] = cb->lut[G][src[j + goffset]]; |
| dst[j + boffset] = cb->lut[B][src[j + boffset]]; |
| if (in != out && step == 4) |
| dst[j + aoffset] = src[j + aoffset]; |
| } |
| |
| srcrow += in->linesize[0]; |
| dstrow += out->linesize[0]; |
| } |
| |
| if (in != out) |
| av_frame_free(&in); |
| return ff_filter_frame(ctx->outputs[0], out); |
| } |
| |
| static const AVFilterPad colorbalance_inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .filter_frame = filter_frame, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad colorbalance_outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .config_props = config_output, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter avfilter_vf_colorbalance = { |
| .name = "colorbalance", |
| .description = NULL_IF_CONFIG_SMALL("Adjust the color balance."), |
| .priv_size = sizeof(ColorBalanceContext), |
| .priv_class = &colorbalance_class, |
| .query_formats = query_formats, |
| .inputs = colorbalance_inputs, |
| .outputs = colorbalance_outputs, |
| .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
| }; |