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- /*
- * 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
- };
- 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_output(AVFilterLink *outlink)
- {
- AVFilterContext *ctx = outlink->src;
- ColorChannelMixerContext *s = ctx->priv;
- int i, j, size, *buffer;
- ff_fill_rgba_map(s->rgba_map, outlink->format);
- switch (outlink->format) {
- case AV_PIX_FMT_RGB48:
- case AV_PIX_FMT_BGR48:
- case AV_PIX_FMT_RGBA64:
- case AV_PIX_FMT_BGRA64:
- size = 65536;
- break;
- default:
- size = 256;
- }
- s->buffer = buffer = av_malloc(16 * size * sizeof(*s->buffer));
- if (!s->buffer)
- return AVERROR(ENOMEM);
- for (i = 0; i < 4; i++)
- for (j = 0; j < 4; j++, buffer += size)
- s->lut[i][j] = buffer;
- for (i = 0; i < size; i++) {
- s->lut[R][R][i] = lrint(i * s->rr);
- s->lut[R][G][i] = lrint(i * s->rg);
- s->lut[R][B][i] = lrint(i * s->rb);
- s->lut[R][A][i] = lrint(i * s->ra);
- s->lut[G][R][i] = lrint(i * s->gr);
- s->lut[G][G][i] = lrint(i * s->gg);
- s->lut[G][B][i] = lrint(i * s->gb);
- s->lut[G][A][i] = lrint(i * s->ga);
- s->lut[B][R][i] = lrint(i * s->br);
- s->lut[B][G][i] = lrint(i * s->bg);
- s->lut[B][B][i] = lrint(i * s->bb);
- s->lut[B][A][i] = lrint(i * s->ba);
- s->lut[A][R][i] = lrint(i * s->ar);
- s->lut[A][G][i] = lrint(i * s->ag);
- s->lut[A][B][i] = lrint(i * s->ab);
- s->lut[A][A][i] = lrint(i * s->aa);
- }
- return 0;
- }
- static int filter_frame(AVFilterLink *inlink, AVFrame *in)
- {
- AVFilterContext *ctx = inlink->dst;
- ColorChannelMixerContext *s = ctx->priv;
- AVFilterLink *outlink = ctx->outputs[0];
- const uint8_t roffset = s->rgba_map[R];
- 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 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(s->lut[R][R][rin] +
- s->lut[R][G][gin] +
- s->lut[R][B][bin]);
- dst[j + goffset] = av_clip_uint8(s->lut[G][R][rin] +
- s->lut[G][G][gin] +
- s->lut[G][B][bin]);
- dst[j + boffset] = av_clip_uint8(s->lut[B][R][rin] +
- s->lut[B][G][gin] +
- s->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(s->lut[R][R][rin] +
- s->lut[R][G][gin] +
- s->lut[R][B][bin]);
- dst[j + goffset] = av_clip_uint8(s->lut[G][R][rin] +
- s->lut[G][G][gin] +
- s->lut[G][B][bin]);
- dst[j + boffset] = av_clip_uint8(s->lut[B][R][rin] +
- s->lut[B][G][gin] +
- s->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(s->lut[R][R][rin] +
- s->lut[R][G][gin] +
- s->lut[R][B][bin] +
- s->lut[R][A][ain]);
- dst[j + goffset] = av_clip_uint8(s->lut[G][R][rin] +
- s->lut[G][G][gin] +
- s->lut[G][B][bin] +
- s->lut[G][A][ain]);
- dst[j + boffset] = av_clip_uint8(s->lut[B][R][rin] +
- s->lut[B][G][gin] +
- s->lut[B][B][bin] +
- s->lut[B][A][ain]);
- dst[j + aoffset] = av_clip_uint8(s->lut[A][R][rin] +
- s->lut[A][G][gin] +
- s->lut[A][B][bin] +
- s->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(s->lut[R][R][rin] +
- s->lut[R][G][gin] +
- s->lut[R][B][bin]);
- dst[j + goffset] = av_clip_uint16(s->lut[G][R][rin] +
- s->lut[G][G][gin] +
- s->lut[G][B][bin]);
- dst[j + boffset] = av_clip_uint16(s->lut[B][R][rin] +
- s->lut[B][G][gin] +
- s->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(s->lut[R][R][rin] +
- s->lut[R][G][gin] +
- s->lut[R][B][bin] +
- s->lut[R][A][ain]);
- dst[j + goffset] = av_clip_uint16(s->lut[G][R][rin] +
- s->lut[G][G][gin] +
- s->lut[G][B][bin] +
- s->lut[G][A][ain]);
- dst[j + boffset] = av_clip_uint16(s->lut[B][R][rin] +
- s->lut[B][G][gin] +
- s->lut[B][B][bin] +
- s->lut[B][A][ain]);
- dst[j + aoffset] = av_clip_uint16(s->lut[A][R][rin] +
- s->lut[A][G][gin] +
- s->lut[A][B][bin] +
- s->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 *s = ctx->priv;
- av_freep(&s->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 ff_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,
- .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
- };
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