[FFmpeg-devel] [PATCH] avfilter: add setrange filter
Paul B Mahol
onemda at gmail.com
Sun Dec 3 13:19:03 EET 2017
Signed-off-by: Paul B Mahol <onemda at gmail.com>
---
doc/filters.texi | 31 ++++++++++++++++++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_setparams.c | 82 ++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 115 insertions(+)
create mode 100644 libavfilter/vf_setparams.c
diff --git a/doc/filters.texi b/doc/filters.texi
index f7c371592f..718263a608 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -18496,6 +18496,37 @@ asetpts=N/SR/TB
@end itemize
+ at section setrange
+
+Force color range for the output video frame.
+
+The @code{setrange} filter marks the color range property for the
+output frames. It does not change the input frame, but only sets the
+corresponding property, which affects how the frame is treated by
+following filters.
+
+The filter accepts the following options:
+
+ at table @option
+
+ at item range
+Available values are:
+
+ at table @samp
+ at item auto
+Keep the same color range property.
+
+ at item unspecified, unknown
+Set the color range as unspecified.
+
+ at item limited, tv, mpeg
+Set the color range as limited.
+
+ at item full, pc, jpeg
+Set the color range as full.
+ at end table
+ at end table
+
@section settb, asettb
Set the timebase to use for the output frames timestamps.
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 1c0cc1da80..6b06d57234 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -300,6 +300,7 @@ OBJS-$(CONFIG_SEPARATEFIELDS_FILTER) += vf_separatefields.o
OBJS-$(CONFIG_SETDAR_FILTER) += vf_aspect.o
OBJS-$(CONFIG_SETFIELD_FILTER) += vf_setfield.o
OBJS-$(CONFIG_SETPTS_FILTER) += setpts.o
+OBJS-$(CONFIG_SETRANGE_FILTER) += vf_setparams.o
OBJS-$(CONFIG_SETSAR_FILTER) += vf_aspect.o
OBJS-$(CONFIG_SETTB_FILTER) += settb.o
OBJS-$(CONFIG_SHOWINFO_FILTER) += vf_showinfo.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index fc212e58db..707faad777 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -309,6 +309,7 @@ static void register_all(void)
REGISTER_FILTER(SETDAR, setdar, vf);
REGISTER_FILTER(SETFIELD, setfield, vf);
REGISTER_FILTER(SETPTS, setpts, vf);
+ REGISTER_FILTER(SETRANGE, setrange, vf);
REGISTER_FILTER(SETSAR, setsar, vf);
REGISTER_FILTER(SETTB, settb, vf);
REGISTER_FILTER(SHOWINFO, showinfo, vf);
diff --git a/libavfilter/vf_setparams.c b/libavfilter/vf_setparams.c
new file mode 100644
index 0000000000..7668bd4cdf
--- /dev/null
+++ b/libavfilter/vf_setparams.c
@@ -0,0 +1,82 @@
+/*
+ * 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/pixfmt.h"
+#include "libavutil/opt.h"
+#include "avfilter.h"
+#include "internal.h"
+#include "video.h"
+
+typedef struct SetParamsContext {
+ const AVClass *class;
+ int color_range;
+} SetParamsContext;
+
+#define OFFSET(x) offsetof(SetParamsContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+
+static const AVOption setrange_options[] = {
+ {"range", "select color range", OFFSET(color_range), AV_OPT_TYPE_INT, {.i64=-1},-1, AVCOL_RANGE_NB-1, FLAGS, "range"},
+ {"auto", "keep the same color range", 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, FLAGS, "range"},
+ {"unspecified", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_UNSPECIFIED}, 0, 0, FLAGS, "range"},
+ {"unknown", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_UNSPECIFIED}, 0, 0, FLAGS, "range"},
+ {"limited", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range"},
+ {"tv", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range"},
+ {"mpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range"},
+ {"full", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range"},
+ {"pc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range"},
+ {"jpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range"},
+ {NULL}
+};
+
+AVFILTER_DEFINE_CLASS(setrange);
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
+{
+ SetParamsContext *s = inlink->dst->priv;
+
+ if (s->color_range >= 0)
+ frame->color_range = s->color_range;
+ return ff_filter_frame(inlink->dst->outputs[0], frame);
+}
+
+static const AVFilterPad inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = filter_frame,
+ },
+ { NULL }
+};
+
+static const AVFilterPad outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_setrange = {
+ .name = "setrange",
+ .description = NULL_IF_CONFIG_SMALL("Force color range for the output video frame."),
+ .priv_size = sizeof(SetParamsContext),
+ .priv_class = &setrange_class,
+ .inputs = inputs,
+ .outputs = outputs,
+};
--
2.11.0
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