| /* |
| * 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 Range { |
| double in_min, in_max; |
| double out_min, out_max; |
| } Range; |
| |
| typedef struct ColorLevelsContext { |
| 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|AV_OPT_FLAG_RUNTIME_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; |
| } |
| |
| struct thread_data { |
| const uint8_t *srcrow; |
| uint8_t *dstrow; |
| int dst_linesize; |
| int src_linesize; |
| |
| double coeff; |
| uint8_t offset; |
| |
| int h; |
| |
| int imin; |
| int omin; |
| }; |
| |
| #define LOAD_COMMON\ |
| ColorLevelsContext *s = ctx->priv;\ |
| const struct thread_data *td = arg;\ |
| \ |
| int process_h = td->h;\ |
| const int slice_start = (process_h * jobnr ) / nb_jobs;\ |
| const int slice_end = (process_h * (jobnr+1)) / nb_jobs;\ |
| int x, y;\ |
| const uint8_t *srcrow = td->srcrow;\ |
| uint8_t *dstrow = td->dstrow;\ |
| const int step = s->step;\ |
| const uint8_t offset = td->offset;\ |
| \ |
| int imin = td->imin;\ |
| int omin = td->omin;\ |
| double coeff = td->coeff;\ |
| |
| static int colorlevel_slice_8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
| { |
| LOAD_COMMON |
| |
| for (y = slice_start; y < slice_end; y++) { |
| const uint8_t *src = srcrow + y * td->src_linesize; |
| uint8_t *dst = dstrow + y * td->dst_linesize; |
| |
| for (x = 0; x < s->linesize; x += step) |
| dst[x + offset] = av_clip_uint8((src[x + offset] - imin) * coeff + omin); |
| } |
| |
| return 0; |
| } |
| |
| static int colorlevel_slice_16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
| { |
| LOAD_COMMON |
| |
| for (y = slice_start; y < slice_end; y++) { |
| const uint16_t *src = (const uint16_t *)(srcrow + y * td->src_linesize); |
| uint16_t *dst = (uint16_t *)(dstrow + y * td->dst_linesize); |
| |
| for (x = 0; x < s->linesize; x += step) |
| dst[x + offset] = av_clip_uint16((src[x + offset] - imin) * coeff + omin); |
| } |
| |
| 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; |
| struct thread_data td; |
| |
| 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); |
| |
| td.srcrow = srcrow; |
| td.dstrow = dstrow; |
| td.dst_linesize = out->linesize[0]; |
| td.src_linesize = in->linesize[0]; |
| td.coeff = coeff; |
| td.offset = offset; |
| td.h = inlink->h; |
| td.imin = imin; |
| td.omin = omin; |
| |
| ctx->internal->execute(ctx, colorlevel_slice_8, &td, NULL, |
| FFMIN(inlink->h, ff_filter_get_nb_threads(ctx))); |
| } |
| 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; |
| struct thread_data td; |
| |
| 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); |
| |
| td.srcrow = srcrow; |
| td.dstrow = dstrow; |
| td.dst_linesize = out->linesize[0]; |
| td.src_linesize = in->linesize[0]; |
| td.coeff = coeff; |
| td.offset = offset; |
| td.h = inlink->h; |
| td.imin = imin; |
| td.omin = omin; |
| |
| ctx->internal->execute(ctx, colorlevel_slice_16, &td, NULL, |
| FFMIN(inlink->h, ff_filter_get_nb_threads(ctx))); |
| } |
| } |
| |
| 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 | AVFILTER_FLAG_SLICE_THREADS, |
| .process_command = ff_filter_process_command, |
| }; |