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/*
* 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,
};