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avfilter/vF_colorbalance: rewrite, fixes filtering

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This commit is contained in:
Paul B Mahol 2019-11-13 00:22:13 +01:00
parent 20c5f4d835
commit 08c46e40fb
1 changed files with 71 additions and 69 deletions
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140
libavfilter/vf_colorbalance.c
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@ -47,12 +47,11 @@ typedef struct ColorBalanceContext {
Range magenta_green;
Range yellow_blue;
uint16_t lut[3][65536];
uint8_t rgba_map[4];
int depth;
int step;
int (*apply_lut)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
int (*color_balance)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
} ColorBalanceContext;
#define OFFSET(x) offsetof(ColorBalanceContext, x)
@ -96,7 +95,29 @@ static int query_formats(AVFilterContext *ctx)
return ff_set_common_formats(ctx, fmts_list);
}
static int apply_lut8_p(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int get_component(int c, int depth, double l,
double s, double m, double h)
{
const double a = 4, b = 0.333, scale = 0.7;
const double max = (1 << depth) - 1;
double v = c / max;
l /= max;
s *= av_clipd((b - l) * a + 0.5, 0, 1) * scale;
m *= av_clipd((l - b) * a + 0.5, 0, 1) * av_clipd((1.0 - l - b) * a + 0.5, 0, 1) * scale;
h *= av_clipd((l + b - 1) * a + 0.5, 0, 1) * scale;
v += s;
v += m;
v += h;
v = av_clipd(v, 0, 1);
c = v * max;
return av_clip_uintp2_c(c, depth);
}
static int color_balance8_p(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
ColorBalanceContext *s = ctx->priv;
ThreadData *td = arg;
@ -112,13 +133,19 @@ static int apply_lut8_p(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
uint8_t *dstb = out->data[1] + slice_start * out->linesize[1];
uint8_t *dstr = out->data[2] + slice_start * out->linesize[2];
uint8_t *dsta = out->data[3] + slice_start * out->linesize[3];
const int depth = s->depth;
int i, j;
for (i = slice_start; i < slice_end; i++) {
for (j = 0; j < out->width; j++) {
dstg[j] = s->lut[G][srcg[j]];
dstb[j] = s->lut[B][srcb[j]];
dstr[j] = s->lut[R][srcr[j]];
const int r = srcr[j];
const int g = srcg[j];
const int b = srcb[j];
const int l = FFMAX3(r, g, b) + FFMIN3(r, g, b);
dstr[j] = get_component(r, depth, l, s->cyan_red.shadows, s->cyan_red.midtones, s->cyan_red.highlights);
dstg[j] = get_component(g, depth, l, s->magenta_green.shadows, s->magenta_green.midtones, s->magenta_green.highlights);
dstb[j] = get_component(b, depth, l, s->yellow_blue.shadows, s->yellow_blue.midtones, s->yellow_blue.highlights);
if (in != out && out->linesize[3])
dsta[j] = srca[j];
}
@ -136,7 +163,7 @@ static int apply_lut8_p(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
return 0;
}
static int apply_lut16_p(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int color_balance16_p(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
ColorBalanceContext *s = ctx->priv;
ThreadData *td = arg;
@ -152,13 +179,19 @@ static int apply_lut16_p(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs
uint16_t *dstb = (uint16_t *)out->data[1] + slice_start * out->linesize[1] / 2;
uint16_t *dstr = (uint16_t *)out->data[2] + slice_start * out->linesize[2] / 2;
uint16_t *dsta = (uint16_t *)out->data[3] + slice_start * out->linesize[3] / 2;
const int depth = s->depth;
int i, j;
for (i = slice_start; i < slice_end; i++) {
for (j = 0; j < out->width; j++) {
dstg[j] = s->lut[G][srcg[j]];
dstb[j] = s->lut[B][srcb[j]];
dstr[j] = s->lut[R][srcr[j]];
const int r = srcr[j];
const int g = srcg[j];
const int b = srcb[j];
const int l = FFMAX3(r, g, b) + FFMIN3(r, g, b);
dstr[j] = get_component(r, depth, l, s->cyan_red.shadows, s->cyan_red.midtones, s->cyan_red.highlights);
dstg[j] = get_component(g, depth, l, s->magenta_green.shadows, s->magenta_green.midtones, s->magenta_green.highlights);
dstb[j] = get_component(b, depth, l, s->yellow_blue.shadows, s->yellow_blue.midtones, s->yellow_blue.highlights);
if (in != out && out->linesize[3])
dsta[j] = srca[j];
}
@ -176,7 +209,7 @@ static int apply_lut16_p(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs
return 0;
}
static int apply_lut8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int color_balance8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
ColorBalanceContext *s = ctx->priv;
ThreadData *td = arg;
@ -190,6 +223,7 @@ static int apply_lut8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
const uint8_t goffset = s->rgba_map[G];
const uint8_t boffset = s->rgba_map[B];
const uint8_t aoffset = s->rgba_map[A];
const int depth = s->depth;
const int step = s->step;
uint8_t *dstrow;
int i, j;
@ -200,9 +234,14 @@ static int apply_lut8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
uint8_t *dst = dstrow;
for (j = 0; j < outlink->w * step; j += step) {
dst[j + roffset] = s->lut[R][src[j + roffset]];
dst[j + goffset] = s->lut[G][src[j + goffset]];
dst[j + boffset] = s->lut[B][src[j + boffset]];
const int r = src[j + roffset];
const int g = src[j + goffset];
const int b = src[j + boffset];
const int l = FFMAX3(r, g, b) + FFMIN3(r, g, b);
dst[j + roffset] = get_component(r, depth, l, s->cyan_red.shadows, s->cyan_red.midtones, s->cyan_red.highlights);
dst[j + goffset] = get_component(g, depth, l, s->magenta_green.shadows, s->magenta_green.midtones, s->magenta_green.highlights);
dst[j + boffset] = get_component(b, depth, l, s->yellow_blue.shadows, s->yellow_blue.midtones, s->yellow_blue.highlights);
if (in != out && step == 4)
dst[j + aoffset] = src[j + aoffset];
}
@ -214,7 +253,7 @@ static int apply_lut8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
return 0;
}
static int apply_lut16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int color_balance16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
ColorBalanceContext *s = ctx->priv;
ThreadData *td = arg;
@ -229,6 +268,7 @@ static int apply_lut16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
const uint8_t boffset = s->rgba_map[B];
const uint8_t aoffset = s->rgba_map[A];
const int step = s->step / 2;
const int depth = s->depth;
uint16_t *dstrow;
int i, j;
@ -238,9 +278,14 @@ static int apply_lut16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
uint16_t *dst = dstrow;
for (j = 0; j < outlink->w * step; j += step) {
dst[j + roffset] = s->lut[R][src[j + roffset]];
dst[j + goffset] = s->lut[G][src[j + goffset]];
dst[j + boffset] = s->lut[B][src[j + boffset]];
const int r = src[j + roffset];
const int g = src[j + goffset];
const int b = src[j + boffset];
const int l = FFMAX3(r, g, b) + FFMIN3(r, g, b);
dst[j + roffset] = get_component(r, depth, l, s->cyan_red.shadows, s->cyan_red.midtones, s->cyan_red.highlights);
dst[j + goffset] = get_component(g, depth, l, s->magenta_green.shadows, s->magenta_green.midtones, s->magenta_green.highlights);
dst[j + boffset] = get_component(b, depth, l, s->yellow_blue.shadows, s->yellow_blue.midtones, s->yellow_blue.highlights);
if (in != out && step == 4)
dst[j + aoffset] = src[j + aoffset];
}
@ -260,62 +305,19 @@ static int config_output(AVFilterLink *outlink)
const int depth = desc->comp[0].depth;
const int max = 1 << depth;
const int planar = av_pix_fmt_count_planes(outlink->format) > 1;
double *shadows, *midtones, *highlights, *buffer;
int i, r, g, b;
s->depth = depth;
if (max == 256 && planar) {
s->apply_lut = apply_lut8_p;
s->color_balance = color_balance8_p;
} else if (planar) {
s->apply_lut = apply_lut16_p;
s->color_balance = color_balance16_p;
} else if (max == 256) {
s->apply_lut = apply_lut8;
s->color_balance = color_balance8;
} else {
s->apply_lut = apply_lut16;
s->color_balance = color_balance16;
}
buffer = av_malloc(max * 3 * sizeof(*buffer));
if (!buffer)
return AVERROR(ENOMEM);
shadows = buffer + max * 0;
midtones = buffer + max * 1;
highlights = buffer + max * 2;
for (i = 0; i < max; i++) {
const double L = 0.333 * (max - 1);
const double M = 0.7 * (max - 1);
const double H = 1 * (max - 1);
double low = av_clipd((i - L) / (-max * 0.25) + 0.5, 0, 1) * M;
double mid = av_clipd((i - L) / ( max * 0.25) + 0.5, 0, 1) *
av_clipd((i + L - H) / (-max * 0.25) + 0.5, 0, 1) * M;
shadows[i] = low;
midtones[i] = mid;
highlights[max - i - 1] = low;
}
for (i = 0; i < max; i++) {
r = g = b = i;
r = av_clip_uintp2_c(r + s->cyan_red.shadows * shadows[r], depth);
r = av_clip_uintp2_c(r + s->cyan_red.midtones * midtones[r], depth);
r = av_clip_uintp2_c(r + s->cyan_red.highlights * highlights[r], depth);
g = av_clip_uintp2_c(g + s->magenta_green.shadows * shadows[g], depth);
g = av_clip_uintp2_c(g + s->magenta_green.midtones * midtones[g], depth);
g = av_clip_uintp2_c(g + s->magenta_green.highlights * highlights[g], depth);
b = av_clip_uintp2_c(b + s->yellow_blue.shadows * shadows[b], depth);
b = av_clip_uintp2_c(b + s->yellow_blue.midtones * midtones[b], depth);
b = av_clip_uintp2_c(b + s->yellow_blue.highlights * highlights[b], depth);
s->lut[R][i] = r;
s->lut[G][i] = g;
s->lut[B][i] = b;
}
av_free(buffer);
ff_fill_rgba_map(s->rgba_map, outlink->format);
s->step = av_get_padded_bits_per_pixel(desc) >> 3;
@ -343,7 +345,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
td.in = in;
td.out = out;
ctx->internal->execute(ctx, s->apply_lut, &td, NULL, FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));
ctx->internal->execute(ctx, s->color_balance, &td, NULL, FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));
if (in != out)
av_frame_free(&in);