Signed-off-by: Paul B Mahol <one...@gmail.com>
---
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_pseudocolor.c | 199 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 201 insertions(+)
create mode 100644 libavfilter/vf_pseudocolor.c
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index ee16361..6b24745 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -258,6 +258,7 @@ OBJS-$(CONFIG_PP_FILTER) += vf_pp.o
OBJS-$(CONFIG_PP7_FILTER) += vf_pp7.o
OBJS-$(CONFIG_PREMULTIPLY_FILTER) += vf_premultiply.o framesync.o
OBJS-$(CONFIG_PREWITT_FILTER) += vf_convolution.o
+OBJS-$(CONFIG_PSEUDOCOLOR_FILTER) += vf_pseudocolor.o
OBJS-$(CONFIG_PSNR_FILTER) += vf_psnr.o dualinput.o
framesync.o
OBJS-$(CONFIG_PULLUP_FILTER) += vf_pullup.o
OBJS-$(CONFIG_QP_FILTER) += vf_qp.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index b1c2d11..da570b2 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -269,6 +269,7 @@ static void register_all(void)
REGISTER_FILTER(PP7, pp7, vf);
REGISTER_FILTER(PREMULTIPLY, premultiply, vf);
REGISTER_FILTER(PREWITT, prewitt, vf);
+ REGISTER_FILTER(PSEUDOCOLOR, pseudocolor, vf);
REGISTER_FILTER(PSNR, psnr, vf);
REGISTER_FILTER(PULLUP, pullup, vf);
REGISTER_FILTER(QP, qp, vf);
diff --git a/libavfilter/vf_pseudocolor.c b/libavfilter/vf_pseudocolor.c
new file mode 100644
index 0000000..413b6e2
--- /dev/null
+++ b/libavfilter/vf_pseudocolor.c
@@ -0,0 +1,199 @@
+/*
+ * Copyright (c) 2017 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/attributes.h"
+#include "libavutil/common.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+
+typedef struct PseudoColorContext {
+ const AVClass *class;
+ int is_16bit;
+ int nb_planes;
+ int color;
+ int linesize[4];
+ int width[4], height[4];
+ uint16_t lut[3][256*256];
+} PseudoColorContext;
+
+#define OFFSET(x) offsetof(PseudoColorContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+
+static const AVOption pseudocolor_options[] = {
+ { "color", "set a color", OFFSET(color), AV_OPT_TYPE_INT, {.i64=0}, 0, 10,
.flags=FLAGS },
+ { NULL }
+};
+
+static const enum AVPixelFormat yuv_pix_fmts[] = { AV_PIX_FMT_YUV444P,
AV_PIX_FMT_NONE };
+
+static int query_formats(AVFilterContext *ctx)
+{
+ const enum AVPixelFormat *pix_fmts = yuv_pix_fmts;
+ 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;
+ PseudoColorContext *s = ctx->priv;
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+ int ret, hsub, vsub;
+
+ s->is_16bit = desc->comp[0].depth > 8;
+ s->nb_planes = av_pix_fmt_count_planes(inlink->format);
+
+ if ((ret = av_image_fill_linesizes(s->linesize, inlink->format,
inlink->w)) < 0)
+ return ret;
+
+ hsub = desc->log2_chroma_w;
+ vsub = desc->log2_chroma_h;
+ s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
+ s->height[0] = s->height[3] = inlink->h;
+ s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
+ s->width[0] = s->width[3] = inlink->w;
+
+ return 0;
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *in)
+{
+ AVFilterContext *ctx = inlink->dst;
+ PseudoColorContext *s = ctx->priv;
+ AVFilterLink *outlink = ctx->outputs[0];
+ AVFrame *out;
+ int x, y, plane;
+
+ 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);
+ }
+
+ for (plane = 0; plane < s->nb_planes; plane++) {
+ const uint8_t *src = in->data[0];
+ uint8_t *dst = out->data[plane];
+
+ for (y = 0; y < s->height[plane]; y++) {
+ for (x = 0; x < s->width[plane]; x++) {
+ dst[x] = s->lut[plane][src[x]];
+ }
+ src += in->linesize[plane];
+ dst += out->linesize[plane];
+ }
+ }
+
+ if (out != in)
+ av_frame_free(&in);
+
+ return ff_filter_frame(outlink, out);
+}
+
+static const AVFilterPad inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = filter_frame,
+ .config_props = config_input,
+ },
+ { NULL }
+};
+
+static const AVFilterPad outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+static av_cold int init(AVFilterContext *ctx)
+{
+ PseudoColorContext *s = ctx->priv;
+ int i;
+
+ for (i = 0; i < 256; i++) {
+ float div = i / 256. * 6;
+ float idiv;
+ int asc = modff(div, &idiv) * 255;
+ int desc = 255 - asc;;
+
+ switch ((int)idiv) {
+ case 0:
+ s->lut[0][i] = i;
+ s->lut[1][i] = desc;
+ s->lut[2][i] = 0;
+ break;
+ case 1:
+ s->lut[0][i] = i;
+ s->lut[1][i] = 0;
+ s->lut[2][i] = asc;
+ break;
+ case 2:
+ s->lut[0][i] = i;
+ s->lut[1][i] = asc;
+ s->lut[2][i] = desc;
+ break;
+ case 3:
+ s->lut[0][i] = i;
+ s->lut[1][i] = desc;
+ s->lut[2][i] = asc;
+ break;
+ case 4:
+ s->lut[0][i] = i;
+ s->lut[1][i] = 0;
+ s->lut[2][i] = desc;
+ break;
+ case 5:
+ s->lut[0][i] = i;
+ s->lut[1][i] = asc;
+ s->lut[2][i] = 0;
+ break;
+ };
+ }
+
+ return 0;
+}
+
+AVFILTER_DEFINE_CLASS(pseudocolor);
+
+AVFilter ff_vf_pseudocolor = {
+ .name = "pseudocolor",
+ .description = NULL_IF_CONFIG_SMALL("Generate a pseudocolored video
frames"),
+ .priv_size = sizeof(PseudoColorContext),
+ .priv_class = &pseudocolor_class,
+ .init = init,
+ .query_formats = query_formats,
+ .inputs = inputs,
+ .outputs = outputs,
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
+};
--
2.9.3
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
