diff options
Diffstat (limited to 'libavfilter/vf_colorlevels.c')
-rw-r--r-- | libavfilter/vf_colorlevels.c | 256 |
1 files changed, 256 insertions, 0 deletions
diff --git a/libavfilter/vf_colorlevels.c b/libavfilter/vf_colorlevels.c new file mode 100644 index 0000000000..dedbe30d19 --- /dev/null +++ b/libavfilter/vf_colorlevels.c @@ -0,0 +1,256 @@ +/* + * 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/imgutils.h" +#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 in_min, in_max; + double out_min, out_max; +} Range; + +typedef struct { + const AVClass *class; + Range range[4]; + int nb_comp; + int bpp; + int step; + uint8_t rgba_map[4]; + int linesize; +} ColorLevelsContext; + +#define OFFSET(x) offsetof(ColorLevelsContext, x) +#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM +static const AVOption colorlevels_options[] = { + { "rimin", "set input red black point", OFFSET(range[R].in_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, + { "gimin", "set input green black point", OFFSET(range[G].in_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, + { "bimin", "set input blue black point", OFFSET(range[B].in_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, + { "aimin", "set input alpha black point", OFFSET(range[A].in_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS }, + { "rimax", "set input red white point", OFFSET(range[R].in_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -1, 1, FLAGS }, + { "gimax", "set input green white point", OFFSET(range[G].in_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -1, 1, FLAGS }, + { "bimax", "set input blue white point", OFFSET(range[B].in_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -1, 1, FLAGS }, + { "aimax", "set input alpha white point", OFFSET(range[A].in_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -1, 1, FLAGS }, + { "romin", "set output red black point", OFFSET(range[R].out_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS }, + { "gomin", "set output green black point", OFFSET(range[G].out_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS }, + { "bomin", "set output blue black point", OFFSET(range[B].out_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS }, + { "aomin", "set output alpha black point", OFFSET(range[A].out_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS }, + { "romax", "set output red white point", OFFSET(range[R].out_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS }, + { "gomax", "set output green white point", OFFSET(range[G].out_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS }, + { "bomax", "set output blue white point", OFFSET(range[B].out_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS }, + { "aomax", "set output alpha white point", OFFSET(range[A].out_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS }, + { NULL } +}; + +AVFILTER_DEFINE_CLASS(colorlevels); + +static int query_formats(AVFilterContext *ctx) +{ + static const enum AVPixelFormat pix_fmts[] = { + AV_PIX_FMT_0RGB, AV_PIX_FMT_0BGR, + AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR, + AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0, + AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24, + AV_PIX_FMT_RGB48, AV_PIX_FMT_BGR48, + AV_PIX_FMT_RGBA64, AV_PIX_FMT_BGRA64, + AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA, + AV_PIX_FMT_NONE + }; + + AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts); + if (!fmts_list) + return AVERROR(ENOMEM); + return ff_set_common_formats(ctx, fmts_list); +} + +static int config_input(AVFilterLink *inlink) +{ + AVFilterContext *ctx = inlink->dst; + ColorLevelsContext *s = ctx->priv; + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); + + s->nb_comp = desc->nb_components; + s->bpp = desc->comp[0].depth >> 3; + s->step = (av_get_padded_bits_per_pixel(desc) >> 3) / s->bpp; + s->linesize = inlink->w * s->step; + ff_fill_rgba_map(s->rgba_map, inlink->format); + + return 0; +} + +static int filter_frame(AVFilterLink *inlink, AVFrame *in) +{ + AVFilterContext *ctx = inlink->dst; + ColorLevelsContext *s = ctx->priv; + AVFilterLink *outlink = ctx->outputs[0]; + const int step = s->step; + AVFrame *out; + int x, y, i; + + 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); + } + + switch (s->bpp) { + case 1: + for (i = 0; i < s->nb_comp; i++) { + Range *r = &s->range[i]; + const uint8_t offset = s->rgba_map[i]; + const uint8_t *srcrow = in->data[0]; + uint8_t *dstrow = out->data[0]; + int imin = lrint(r->in_min * UINT8_MAX); + int imax = lrint(r->in_max * UINT8_MAX); + int omin = lrint(r->out_min * UINT8_MAX); + int omax = lrint(r->out_max * UINT8_MAX); + double coeff; + + if (imin < 0) { + imin = UINT8_MAX; + for (y = 0; y < inlink->h; y++) { + const uint8_t *src = srcrow; + + for (x = 0; x < s->linesize; x += step) + imin = FFMIN(imin, src[x + offset]); + srcrow += in->linesize[0]; + } + } + if (imax < 0) { + srcrow = in->data[0]; + imax = 0; + for (y = 0; y < inlink->h; y++) { + const uint8_t *src = srcrow; + + for (x = 0; x < s->linesize; x += step) + imax = FFMAX(imax, src[x + offset]); + srcrow += in->linesize[0]; + } + } + + srcrow = in->data[0]; + coeff = (omax - omin) / (double)(imax - imin); + for (y = 0; y < inlink->h; y++) { + const uint8_t *src = srcrow; + uint8_t *dst = dstrow; + + for (x = 0; x < s->linesize; x += step) + dst[x + offset] = av_clip_uint8((src[x + offset] - imin) * coeff + omin); + dstrow += out->linesize[0]; + srcrow += in->linesize[0]; + } + } + break; + case 2: + for (i = 0; i < s->nb_comp; i++) { + Range *r = &s->range[i]; + const uint8_t offset = s->rgba_map[i]; + const uint8_t *srcrow = in->data[0]; + uint8_t *dstrow = out->data[0]; + int imin = lrint(r->in_min * UINT16_MAX); + int imax = lrint(r->in_max * UINT16_MAX); + int omin = lrint(r->out_min * UINT16_MAX); + int omax = lrint(r->out_max * UINT16_MAX); + double coeff; + + if (imin < 0) { + imin = UINT16_MAX; + for (y = 0; y < inlink->h; y++) { + const uint16_t *src = (const uint16_t *)srcrow; + + for (x = 0; x < s->linesize; x += step) + imin = FFMIN(imin, src[x + offset]); + srcrow += in->linesize[0]; + } + } + if (imax < 0) { + srcrow = in->data[0]; + imax = 0; + for (y = 0; y < inlink->h; y++) { + const uint16_t *src = (const uint16_t *)srcrow; + + for (x = 0; x < s->linesize; x += step) + imax = FFMAX(imax, src[x + offset]); + srcrow += in->linesize[0]; + } + } + + srcrow = in->data[0]; + coeff = (omax - omin) / (double)(imax - imin); + for (y = 0; y < inlink->h; y++) { + const uint16_t *src = (const uint16_t*)srcrow; + uint16_t *dst = (uint16_t *)dstrow; + + for (x = 0; x < s->linesize; x += step) + dst[x + offset] = av_clip_uint16((src[x + offset] - imin) * coeff + omin); + dstrow += out->linesize[0]; + srcrow += in->linesize[0]; + } + } + } + + if (in != out) + av_frame_free(&in); + return ff_filter_frame(outlink, out); +} + +static const AVFilterPad colorlevels_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .filter_frame = filter_frame, + .config_props = config_input, + }, + { NULL } +}; + +static const AVFilterPad colorlevels_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + }, + { NULL } +}; + +AVFilter ff_vf_colorlevels = { + .name = "colorlevels", + .description = NULL_IF_CONFIG_SMALL("Adjust the color levels."), + .priv_size = sizeof(ColorLevelsContext), + .priv_class = &colorlevels_class, + .query_formats = query_formats, + .inputs = colorlevels_inputs, + .outputs = colorlevels_outputs, + .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, +}; |