[FFmpeg-cvslog] colorchannelmixer filter
Paul B Mahol
git at videolan.org
Thu Apr 18 17:37:38 CEST 2013
ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Mon Apr 15 16:56:29 2013 +0000| [212960eea4c009e63eecc9386ea3af36c9f57780] | committer: Paul B Mahol
colorchannelmixer filter
Signed-off-by: Paul B Mahol <onemda at gmail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=212960eea4c009e63eecc9386ea3af36c9f57780
---
Changelog | 1 +
doc/filters.texi | 55 ++++++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/version.h | 2 +-
libavfilter/vf_colorchannelmixer.c | 370 ++++++++++++++++++++++++++++++++++++
6 files changed, 429 insertions(+), 1 deletion(-)
diff --git a/Changelog b/Changelog
index eceed90..9ebbc9b 100644
--- a/Changelog
+++ b/Changelog
@@ -24,6 +24,7 @@ version <next>:
- smptehdbars source
- inverse telecine filters (fieldmatch and decimate)
- colorbalance filter
+- colorchannelmixer filter
version 1.2:
diff --git a/doc/filters.texi b/doc/filters.texi
index 56c722d..43d7368 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -2091,6 +2091,61 @@ colorbalance=rs=.3
@end example
@end itemize
+ at section colorchannelmixer
+
+Adjust video input frames by re-mixing color channels.
+
+This filter modifies a color channel by adding the values associated to
+the other channels of the same pixels. For example if the value to
+modify is red, the output value will be:
+ at example
+ at var{red}=@var{red}*@var{rr} + @var{blue}*@var{rb} + @var{green}*@var{rg} + @var{alpha}*@var{ra}
+ at end example
+
+The filter accepts the following options:
+
+ at table @option
+ at item rr
+ at item rg
+ at item rb
+ at item ra
+Adjust contribution of input red, green, blue and alpha channels for output red channel.
+Default is @code{1} for @var{rr}, and @code{0} for @var{rg}, @var{rb} and @var{ra}.
+
+ at item gr
+ at item gg
+ at item gb
+ at item ga
+Adjust contribution of input red, green, blue and alpha channels for output green channel.
+Default is @code{1} for @var{gg}, and @code{0} for @var{gr}, @var{gb} and @var{ga}.
+
+ at item br
+ at item bg
+ at item bb
+ at item ba
+Adjust contribution of input red, green, blue and alpha channels for output blue channel.
+Default is @code{1} for @var{bb}, and @code{0} for @var{br}, @var{bg} and @var{ba}.
+
+ at item ar
+ at item ag
+ at item ab
+ at item aa
+Adjust contribution of input red, green, blue and alpha channels for output alpha channel.
+Default is @code{1} for @var{aa}, and @code{0} for @var{ar}, @var{ag} and @var{ab}.
+
+Allowed ranges for options are @code{[-2.0, 2.0]}.
+ at end table
+
+ at subsection Examples
+
+ at itemize
+ at item
+Convert source to grayscale:
+ at example
+colorchannelmixer=.3:.4:.3:0:.3:.4:.3:0:.3:.4:.3
+ at end example
+ at end itemize
+
@section colormatrix
Convert color matrix.
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 3d42626..33b3f5b 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -105,6 +105,7 @@ OBJS-$(CONFIG_BLACKFRAME_FILTER) += vf_blackframe.o
OBJS-$(CONFIG_BLEND_FILTER) += vf_blend.o
OBJS-$(CONFIG_BOXBLUR_FILTER) += vf_boxblur.o
OBJS-$(CONFIG_COLORBALANCE_FILTER) += vf_colorbalance.o
+OBJS-$(CONFIG_COLORCHANNELMIXER_FILTER) += vf_colorchannelmixer.o
OBJS-$(CONFIG_COLORMATRIX_FILTER) += vf_colormatrix.o
OBJS-$(CONFIG_COPY_FILTER) += vf_copy.o
OBJS-$(CONFIG_CROP_FILTER) += vf_crop.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index bebbf2b..a6c8597 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -103,6 +103,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(BLEND, blend, vf);
REGISTER_FILTER(BOXBLUR, boxblur, vf);
REGISTER_FILTER(COLORBALANCE, colorbalance, vf);
+ REGISTER_FILTER(COLORCHANNELMIXER, colorchannelmixer, vf);
REGISTER_FILTER(COLORMATRIX, colormatrix, vf);
REGISTER_FILTER(COPY, copy, vf);
REGISTER_FILTER(CROP, crop, vf);
diff --git a/libavfilter/version.h b/libavfilter/version.h
index c751674..b0bd3bb 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -29,7 +29,7 @@
#include "libavutil/avutil.h"
#define LIBAVFILTER_VERSION_MAJOR 3
-#define LIBAVFILTER_VERSION_MINOR 57
+#define LIBAVFILTER_VERSION_MINOR 58
#define LIBAVFILTER_VERSION_MICRO 100
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
diff --git a/libavfilter/vf_colorchannelmixer.c b/libavfilter/vf_colorchannelmixer.c
new file mode 100644
index 0000000..963d415
--- /dev/null
+++ b/libavfilter/vf_colorchannelmixer.c
@@ -0,0 +1,370 @@
+/*
+ * 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/opt.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 {
+ const AVClass *class;
+ double rr, rg, rb, ra;
+ double gr, gg, gb, ga;
+ double br, bg, bb, ba;
+ double ar, ag, ab, aa;
+
+ int *lut[4][4];
+
+ int *buffer;
+
+ uint8_t rgba_map[4];
+} ColorChannelMixerContext;
+
+#define OFFSET(x) offsetof(ColorChannelMixerContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+static const AVOption colorchannelmixer_options[] = {
+ { "rr", "set the red gain for the red channel", OFFSET(rr), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -2, 2, FLAGS },
+ { "rg", "set the green gain for the red channel", OFFSET(rg), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
+ { "rb", "set the blue gain for the red channel", OFFSET(rb), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
+ { "ra", "set the alpha gain for the red channel", OFFSET(ra), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
+ { "gr", "set the red gain for the green channel", OFFSET(gr), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
+ { "gg", "set the green gain for the green channel", OFFSET(gg), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -2, 2, FLAGS },
+ { "gb", "set the blue gain for the green channel", OFFSET(gb), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
+ { "ga", "set the alpha gain for the green channel", OFFSET(ga), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
+ { "br", "set the red gain for the blue channel", OFFSET(br), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
+ { "bg", "set the green gain for the blue channel", OFFSET(bg), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
+ { "bb", "set the blue gain for the blue channel", OFFSET(bb), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -2, 2, FLAGS },
+ { "ba", "set the alpha gain for the blue channel", OFFSET(ba), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
+ { "ar", "set the red gain for the alpha channel", OFFSET(ar), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
+ { "ag", "set the green gain for the alpha channel", OFFSET(ag), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
+ { "ab", "set the blue gain for the alpha channel", OFFSET(ab), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
+ { "aa", "set the alpha gain for the alpha channel", OFFSET(aa), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -2, 2, FLAGS },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(colorchannelmixer);
+
+static int query_formats(AVFilterContext *ctx)
+{
+ static const enum AVPixelFormat pix_fmts[] = {
+ AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
+ AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
+ AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
+ AV_PIX_FMT_0RGB, AV_PIX_FMT_0BGR,
+ AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0,
+ AV_PIX_FMT_RGB48, AV_PIX_FMT_BGR48,
+ AV_PIX_FMT_RGBA64, AV_PIX_FMT_BGRA64,
+ AV_PIX_FMT_NONE
+ };
+
+ ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
+ return 0;
+}
+
+static int config_output(AVFilterLink *outlink)
+{
+ AVFilterContext *ctx = outlink->src;
+ ColorChannelMixerContext *cm = ctx->priv;
+ int i, j, size, *buffer;
+
+ switch (outlink->format) {
+ case AV_PIX_FMT_RGB48:
+ case AV_PIX_FMT_BGR48:
+ case AV_PIX_FMT_RGBA64:
+ case AV_PIX_FMT_BGRA64:
+ if (outlink->format == AV_PIX_FMT_RGB48 ||
+ outlink->format == AV_PIX_FMT_RGBA64) {
+ cm->rgba_map[R] = 0;
+ cm->rgba_map[G] = 1;
+ cm->rgba_map[B] = 2;
+ cm->rgba_map[A] = 3;
+ } else {
+ cm->rgba_map[R] = 2;
+ cm->rgba_map[G] = 1;
+ cm->rgba_map[B] = 0;
+ cm->rgba_map[A] = 3;
+ }
+ size = 65536;
+ break;
+ default:
+ ff_fill_rgba_map(cm->rgba_map, outlink->format);
+ size = 256;
+ }
+
+ cm->buffer = buffer = av_malloc(16 * size * sizeof(*cm->buffer));
+ if (!cm->buffer)
+ return AVERROR(ENOMEM);
+
+ for (i = 0; i < 4; i++)
+ for (j = 0; j < 4; j++, buffer += size)
+ cm->lut[i][j] = buffer;
+
+ for (i = 0; i < size; i++) {
+ cm->lut[R][R][i] = i * cm->rr;
+ cm->lut[R][G][i] = i * cm->rg;
+ cm->lut[R][B][i] = i * cm->rb;
+ cm->lut[R][A][i] = i * cm->ra;
+
+ cm->lut[G][R][i] = i * cm->gr;
+ cm->lut[G][G][i] = i * cm->gg;
+ cm->lut[G][B][i] = i * cm->gb;
+ cm->lut[G][A][i] = i * cm->ga;
+
+ cm->lut[B][R][i] = i * cm->br;
+ cm->lut[B][G][i] = i * cm->bg;
+ cm->lut[B][B][i] = i * cm->bb;
+ cm->lut[B][A][i] = i * cm->ba;
+
+ cm->lut[A][R][i] = i * cm->ar;
+ cm->lut[A][G][i] = i * cm->ag;
+ cm->lut[A][B][i] = i * cm->ab;
+ cm->lut[A][A][i] = i * cm->aa;
+ }
+
+ return 0;
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *in)
+{
+ AVFilterContext *ctx = inlink->dst;
+ ColorChannelMixerContext *cm = ctx->priv;
+ AVFilterLink *outlink = ctx->outputs[0];
+ const uint8_t roffset = cm->rgba_map[R];
+ const uint8_t goffset = cm->rgba_map[G];
+ const uint8_t boffset = cm->rgba_map[B];
+ const uint8_t aoffset = cm->rgba_map[A];
+ const uint8_t *srcrow = in->data[0];
+ uint8_t *dstrow;
+ AVFrame *out;
+ int i, j;
+
+ 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);
+ }
+
+ dstrow = out->data[0];
+ switch (outlink->format) {
+ case AV_PIX_FMT_BGR24:
+ case AV_PIX_FMT_RGB24:
+ for (i = 0; i < outlink->h; i++) {
+ const uint8_t *src = srcrow;
+ uint8_t *dst = dstrow;
+
+ for (j = 0; j < outlink->w * 3; j += 3) {
+ const uint8_t rin = src[j + roffset];
+ const uint8_t gin = src[j + goffset];
+ const uint8_t bin = src[j + boffset];
+
+ dst[j + roffset] = av_clip_uint8(cm->lut[R][R][rin] +
+ cm->lut[R][G][gin] +
+ cm->lut[R][B][bin]);
+ dst[j + goffset] = av_clip_uint8(cm->lut[G][R][rin] +
+ cm->lut[G][G][gin] +
+ cm->lut[G][B][bin]);
+ dst[j + boffset] = av_clip_uint8(cm->lut[B][R][rin] +
+ cm->lut[B][G][gin] +
+ cm->lut[B][B][bin]);
+ }
+
+ srcrow += in->linesize[0];
+ dstrow += out->linesize[0];
+ }
+ break;
+ case AV_PIX_FMT_0BGR:
+ case AV_PIX_FMT_0RGB:
+ case AV_PIX_FMT_BGR0:
+ case AV_PIX_FMT_RGB0:
+ for (i = 0; i < outlink->h; i++) {
+ const uint8_t *src = srcrow;
+ uint8_t *dst = dstrow;
+
+ for (j = 0; j < outlink->w * 4; j += 4) {
+ const uint8_t rin = src[j + roffset];
+ const uint8_t gin = src[j + goffset];
+ const uint8_t bin = src[j + boffset];
+
+ dst[j + roffset] = av_clip_uint8(cm->lut[R][R][rin] +
+ cm->lut[R][G][gin] +
+ cm->lut[R][B][bin]);
+ dst[j + goffset] = av_clip_uint8(cm->lut[G][R][rin] +
+ cm->lut[G][G][gin] +
+ cm->lut[G][B][bin]);
+ dst[j + boffset] = av_clip_uint8(cm->lut[B][R][rin] +
+ cm->lut[B][G][gin] +
+ cm->lut[B][B][bin]);
+ if (in != out)
+ dst[j + aoffset] = 0;
+ }
+
+ srcrow += in->linesize[0];
+ dstrow += out->linesize[0];
+ }
+ break;
+ case AV_PIX_FMT_ABGR:
+ case AV_PIX_FMT_ARGB:
+ case AV_PIX_FMT_BGRA:
+ case AV_PIX_FMT_RGBA:
+ for (i = 0; i < outlink->h; i++) {
+ const uint8_t *src = srcrow;
+ uint8_t *dst = dstrow;
+
+ for (j = 0; j < outlink->w * 4; j += 4) {
+ const uint8_t rin = src[j + roffset];
+ const uint8_t gin = src[j + goffset];
+ const uint8_t bin = src[j + boffset];
+ const uint8_t ain = src[j + aoffset];
+
+ dst[j + roffset] = av_clip_uint8(cm->lut[R][R][rin] +
+ cm->lut[R][G][gin] +
+ cm->lut[R][B][bin] +
+ cm->lut[R][A][ain]);
+ dst[j + goffset] = av_clip_uint8(cm->lut[G][R][rin] +
+ cm->lut[G][G][gin] +
+ cm->lut[G][B][bin] +
+ cm->lut[G][A][ain]);
+ dst[j + boffset] = av_clip_uint8(cm->lut[B][R][rin] +
+ cm->lut[B][G][gin] +
+ cm->lut[B][B][bin] +
+ cm->lut[B][A][ain]);
+ dst[j + aoffset] = av_clip_uint8(cm->lut[A][R][rin] +
+ cm->lut[A][G][gin] +
+ cm->lut[A][B][bin] +
+ cm->lut[A][A][ain]);
+ }
+
+ srcrow += in->linesize[0];
+ dstrow += out->linesize[0];
+ }
+ break;
+ case AV_PIX_FMT_BGR48:
+ case AV_PIX_FMT_RGB48:
+ for (i = 0; i < outlink->h; i++) {
+ const uint16_t *src = (const uint16_t *)srcrow;
+ uint16_t *dst = (uint16_t *)dstrow;
+
+ for (j = 0; j < outlink->w * 3; j += 3) {
+ const uint16_t rin = src[j + roffset];
+ const uint16_t gin = src[j + goffset];
+ const uint16_t bin = src[j + boffset];
+
+ dst[j + roffset] = av_clip_uint16(cm->lut[R][R][rin] +
+ cm->lut[R][G][gin] +
+ cm->lut[R][B][bin]);
+ dst[j + goffset] = av_clip_uint16(cm->lut[G][R][rin] +
+ cm->lut[G][G][gin] +
+ cm->lut[G][B][bin]);
+ dst[j + boffset] = av_clip_uint16(cm->lut[B][R][rin] +
+ cm->lut[B][G][gin] +
+ cm->lut[B][B][bin]);
+ }
+
+ srcrow += in->linesize[0];
+ dstrow += out->linesize[0];
+ }
+ break;
+ case AV_PIX_FMT_BGRA64:
+ case AV_PIX_FMT_RGBA64:
+ for (i = 0; i < outlink->h; i++) {
+ const uint16_t *src = (const uint16_t *)srcrow;
+ uint16_t *dst = (uint16_t *)dstrow;
+
+ for (j = 0; j < outlink->w * 4; j += 4) {
+ const uint16_t rin = src[j + roffset];
+ const uint16_t gin = src[j + goffset];
+ const uint16_t bin = src[j + boffset];
+ const uint16_t ain = src[j + aoffset];
+
+ dst[j + roffset] = av_clip_uint16(cm->lut[R][R][rin] +
+ cm->lut[R][G][gin] +
+ cm->lut[R][B][bin] +
+ cm->lut[R][A][ain]);
+ dst[j + goffset] = av_clip_uint16(cm->lut[G][R][rin] +
+ cm->lut[G][G][gin] +
+ cm->lut[G][B][bin] +
+ cm->lut[G][A][ain]);
+ dst[j + boffset] = av_clip_uint16(cm->lut[B][R][rin] +
+ cm->lut[B][G][gin] +
+ cm->lut[B][B][bin] +
+ cm->lut[B][A][ain]);
+ dst[j + aoffset] = av_clip_uint16(cm->lut[A][R][rin] +
+ cm->lut[A][G][gin] +
+ cm->lut[A][B][bin] +
+ cm->lut[A][A][ain]);
+ }
+
+ srcrow += in->linesize[0];
+ dstrow += out->linesize[0];
+ }
+ }
+
+ if (in != out)
+ av_frame_free(&in);
+ return ff_filter_frame(ctx->outputs[0], out);
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ ColorChannelMixerContext *cm = ctx->priv;
+
+ av_freep(&cm->buffer);
+}
+
+static const AVFilterPad colorchannelmixer_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = filter_frame,
+ },
+ { NULL }
+};
+
+static const AVFilterPad colorchannelmixer_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_output,
+ },
+ { NULL }
+};
+
+AVFilter avfilter_vf_colorchannelmixer = {
+ .name = "colorchannelmixer",
+ .description = NULL_IF_CONFIG_SMALL("Adjust colors by mixing color channels."),
+ .priv_size = sizeof(ColorChannelMixerContext),
+ .priv_class = &colorchannelmixer_class,
+ .uninit = uninit,
+ .query_formats = query_formats,
+ .inputs = colorchannelmixer_inputs,
+ .outputs = colorchannelmixer_outputs,
+};
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