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-rw-r--r--libavfilter/vf_colorlevels.c254
1 files changed, 254 insertions, 0 deletions
diff --git a/libavfilter/vf_colorlevels.c b/libavfilter/vf_colorlevels.c
new file mode 100644
index 0000000000..4ceea664e0
--- /dev/null
+++ b/libavfilter/vf_colorlevels.c
@@ -0,0 +1,254 @@
+/*
+ * 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
+ };
+
+ ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
+ return 0;
+}
+
+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_minus1 + 1) >> 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 = round(r->in_min * UINT8_MAX);
+ int imax = round(r->in_max * UINT8_MAX);
+ int omin = round(r->out_min * UINT8_MAX);
+ int omax = round(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 = round(r->in_min * UINT16_MAX);
+ int imax = round(r->in_max * UINT16_MAX);
+ int omin = round(r->out_min * UINT16_MAX);
+ int omax = round(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,
+};
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