[deb_ffmpeg.git] / ffmpeg / libavfilter / vf_colorbalance.c

/*
 * 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 "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 shadows;
    double midtones;
    double highlights;
} Range;

typedef struct {
    const AVClass *class;
    Range cyan_red;
    Range magenta_green;
    Range yellow_blue;

    uint8_t lut[3][256];

    uint8_t rgba_map[4];
    int step;
} ColorBalanceContext;

#define OFFSET(x) offsetof(ColorBalanceContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption colorbalance_options[] = {
    { "rs", "set red shadows",      OFFSET(cyan_red.shadows),         AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
    { "gs", "set green shadows",    OFFSET(magenta_green.shadows),    AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
    { "bs", "set blue shadows",     OFFSET(yellow_blue.shadows),      AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
    { "rm", "set red midtones",     OFFSET(cyan_red.midtones),        AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
    { "gm", "set green midtones",   OFFSET(magenta_green.midtones),   AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
    { "bm", "set blue midtones",    OFFSET(yellow_blue.midtones),     AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
    { "rh", "set red highlights",   OFFSET(cyan_red.highlights),      AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
    { "gh", "set green highlights", OFFSET(magenta_green.highlights), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
    { "bh", "set blue highlights",  OFFSET(yellow_blue.highlights),   AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
    { NULL }
};

AVFILTER_DEFINE_CLASS(colorbalance);

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_ABGR,  AV_PIX_FMT_ARGB,
        AV_PIX_FMT_0BGR,  AV_PIX_FMT_0RGB,
        AV_PIX_FMT_RGB0,  AV_PIX_FMT_BGR0,
        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;
    ColorBalanceContext *cb = ctx->priv;
    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format);
    double *shadows, *midtones, *highlights, *buffer;
    int i, r, g, b;

    buffer = av_malloc(256 * 3 * sizeof(*buffer));
    if (!buffer)
        return AVERROR(ENOMEM);

    shadows    = buffer + 256 * 0;
    midtones   = buffer + 256 * 1;
    highlights = buffer + 256 * 2;

    for (i = 0; i < 256; i++) {
        double low = av_clipd((i - 85.0) / -64.0 + 0.5, 0, 1) * 178.5;
        double mid = av_clipd((i - 85.0) /  64.0 + 0.5, 0, 1) *
                     av_clipd((i + 85.0 - 255.0) / -64.0 + 0.5, 0, 1) * 178.5;

        shadows[i] = low;
        midtones[i] = mid;
        highlights[255 - i] = low;
    }

    for (i = 0; i < 256; i++) {
        r = g = b = i;

        r = av_clip_uint8(r + cb->cyan_red.shadows         * shadows[r]);
        r = av_clip_uint8(r + cb->cyan_red.midtones        * midtones[r]);
        r = av_clip_uint8(r + cb->cyan_red.highlights      * highlights[r]);

        g = av_clip_uint8(g + cb->magenta_green.shadows    * shadows[g]);
        g = av_clip_uint8(g + cb->magenta_green.midtones   * midtones[g]);
        g = av_clip_uint8(g + cb->magenta_green.highlights * highlights[g]);

        b = av_clip_uint8(b + cb->yellow_blue.shadows      * shadows[b]);
        b = av_clip_uint8(b + cb->yellow_blue.midtones     * midtones[b]);
        b = av_clip_uint8(b + cb->yellow_blue.highlights   * highlights[b]);

        cb->lut[R][i] = r;
        cb->lut[G][i] = g;
        cb->lut[B][i] = b;
    }

    av_free(buffer);

    ff_fill_rgba_map(cb->rgba_map, outlink->format);
    cb->step = av_get_padded_bits_per_pixel(desc) >> 3;

    return 0;
}

static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
    AVFilterContext *ctx = inlink->dst;
    ColorBalanceContext *cb = ctx->priv;
    AVFilterLink *outlink = ctx->outputs[0];
    const uint8_t roffset = cb->rgba_map[R];
    const uint8_t goffset = cb->rgba_map[G];
    const uint8_t boffset = cb->rgba_map[B];
    const uint8_t aoffset = cb->rgba_map[A];
    const int step = cb->step;
    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];
    for (i = 0; i < outlink->h; i++) {
        const uint8_t *src = srcrow;
        uint8_t *dst = dstrow;

        for (j = 0; j < outlink->w * step; j += step) {
            dst[j + roffset] = cb->lut[R][src[j + roffset]];
            dst[j + goffset] = cb->lut[G][src[j + goffset]];
            dst[j + boffset] = cb->lut[B][src[j + boffset]];
            if (in != out && step == 4)
                dst[j + aoffset] = src[j + aoffset];
        }

        srcrow += in->linesize[0];
        dstrow += out->linesize[0];
    }

    if (in != out)
        av_frame_free(&in);
    return ff_filter_frame(ctx->outputs[0], out);
}

static const AVFilterPad colorbalance_inputs[] = {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .filter_frame = filter_frame,
    },
    { NULL }
};

static const AVFilterPad colorbalance_outputs[] = {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .config_props = config_output,
    },
    { NULL }
};

AVFilter ff_vf_colorbalance = {
    .name          = "colorbalance",
    .description   = NULL_IF_CONFIG_SMALL("Adjust the color balance."),
    .priv_size     = sizeof(ColorBalanceContext),
    .priv_class    = &colorbalance_class,
    .query_formats = query_formats,
    .inputs        = colorbalance_inputs,
    .outputs       = colorbalance_outputs,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
};
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* Copyright (c) 2013 Paul B Mahol
	3	*
	4	* This file is part of FFmpeg.
	5	*
	6	* FFmpeg is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU Lesser General Public
	8	* License as published by the Free Software Foundation; either
	9	* version 2.1 of the License, or (at your option) any later version.
	10	*
	11	* FFmpeg is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* Lesser General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU Lesser General Public
	17	* License along with FFmpeg; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
	21	#include "libavutil/opt.h"
	22	#include "libavutil/pixdesc.h"
	23	#include "avfilter.h"
	24	#include "drawutils.h"
	25	#include "formats.h"
	26	#include "internal.h"
	27	#include "video.h"
	28
	29	#define R 0
	30	#define G 1
	31	#define B 2
	32	#define A 3
	33
	34	typedef struct {
	35	double shadows;
	36	double midtones;
	37	double highlights;
	38	} Range;
	39
	40	typedef struct {
	41	const AVClass *class;
	42	Range cyan_red;
	43	Range magenta_green;
	44	Range yellow_blue;
	45
	46	uint8_t lut[3][256];
	47
	48	uint8_t rgba_map[4];
	49	int step;
	50	} ColorBalanceContext;
	51
	52	#define OFFSET(x) offsetof(ColorBalanceContext, x)
	53	#define FLAGS AV_OPT_FLAG_FILTERING_PARAM\|AV_OPT_FLAG_VIDEO_PARAM
	54	static const AVOption colorbalance_options[] = {
	55	{ "rs", "set red shadows", OFFSET(cyan_red.shadows), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
	56	{ "gs", "set green shadows", OFFSET(magenta_green.shadows), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
	57	{ "bs", "set blue shadows", OFFSET(yellow_blue.shadows), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
	58	{ "rm", "set red midtones", OFFSET(cyan_red.midtones), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
	59	{ "gm", "set green midtones", OFFSET(magenta_green.midtones), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
	60	{ "bm", "set blue midtones", OFFSET(yellow_blue.midtones), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
	61	{ "rh", "set red highlights", OFFSET(cyan_red.highlights), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
	62	{ "gh", "set green highlights", OFFSET(magenta_green.highlights), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
	63	{ "bh", "set blue highlights", OFFSET(yellow_blue.highlights), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
	64	{ NULL }
65	};
66
67	AVFILTER_DEFINE_CLASS(colorbalance);
68
69	static int query_formats(AVFilterContext *ctx)
70	{
71	static const enum AVPixelFormat pix_fmts[] = {
72	AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
73	AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
74	AV_PIX_FMT_ABGR, AV_PIX_FMT_ARGB,
75	AV_PIX_FMT_0BGR, AV_PIX_FMT_0RGB,
76	AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0,
77	AV_PIX_FMT_NONE
78	};
79
80	ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
81	return 0;
82	}
83
84	static int config_output(AVFilterLink *outlink)
85	{
86	AVFilterContext *ctx = outlink->src;
87	ColorBalanceContext *cb = ctx->priv;
88	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format);
89	double shadows, midtones, highlights, buffer;
90	int i, r, g, b;
91
92	buffer = av_malloc(256 * 3 * sizeof(*buffer));
93	if (!buffer)
94	return AVERROR(ENOMEM);
95
96	shadows = buffer + 256 * 0;
97	midtones = buffer + 256 * 1;
98	highlights = buffer + 256 * 2;
99
100	for (i = 0; i < 256; i++) {
101	double low = av_clipd((i - 85.0) / -64.0 + 0.5, 0, 1) * 178.5;
102	double mid = av_clipd((i - 85.0) / 64.0 + 0.5, 0, 1) *
103	av_clipd((i + 85.0 - 255.0) / -64.0 + 0.5, 0, 1) * 178.5;
104
105	shadows[i] = low;
106	midtones[i] = mid;
107	highlights[255 - i] = low;
108	}
109
110	for (i = 0; i < 256; i++) {
111	r = g = b = i;
112
113	r = av_clip_uint8(r + cb->cyan_red.shadows * shadows[r]);
114	r = av_clip_uint8(r + cb->cyan_red.midtones * midtones[r]);
115	r = av_clip_uint8(r + cb->cyan_red.highlights * highlights[r]);
116
117	g = av_clip_uint8(g + cb->magenta_green.shadows * shadows[g]);
118	g = av_clip_uint8(g + cb->magenta_green.midtones * midtones[g]);
119	g = av_clip_uint8(g + cb->magenta_green.highlights * highlights[g]);
120
121	b = av_clip_uint8(b + cb->yellow_blue.shadows * shadows[b]);
122	b = av_clip_uint8(b + cb->yellow_blue.midtones * midtones[b]);
123	b = av_clip_uint8(b + cb->yellow_blue.highlights * highlights[b]);
124
125	cb->lut[R][i] = r;
126	cb->lut[G][i] = g;
127	cb->lut[B][i] = b;
128	}
129
130	av_free(buffer);
131
132	ff_fill_rgba_map(cb->rgba_map, outlink->format);
133	cb->step = av_get_padded_bits_per_pixel(desc) >> 3;
134
135	return 0;
136	}
137
138	static int filter_frame(AVFilterLink inlink, AVFrame in)
139	{
140	AVFilterContext *ctx = inlink->dst;
141	ColorBalanceContext *cb = ctx->priv;
142	AVFilterLink *outlink = ctx->outputs[0];
143	const uint8_t roffset = cb->rgba_map[R];
144	const uint8_t goffset = cb->rgba_map[G];
145	const uint8_t boffset = cb->rgba_map[B];
146	const uint8_t aoffset = cb->rgba_map[A];
147	const int step = cb->step;
148	const uint8_t *srcrow = in->data[0];
149	uint8_t *dstrow;
150	AVFrame *out;
151	int i, j;
152
153	if (av_frame_is_writable(in)) {
154	out = in;
155	} else {
156	out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
157	if (!out) {
158	av_frame_free(&in);
159	return AVERROR(ENOMEM);
160	}
161	av_frame_copy_props(out, in);
162	}
163
164	dstrow = out->data[0];
165	for (i = 0; i < outlink->h; i++) {
166	const uint8_t *src = srcrow;
167	uint8_t *dst = dstrow;
168
169	for (j = 0; j < outlink->w * step; j += step) {
170	dst[j + roffset] = cb->lut[R][src[j + roffset]];
171	dst[j + goffset] = cb->lut[G][src[j + goffset]];
172	dst[j + boffset] = cb->lut[B][src[j + boffset]];
173	if (in != out && step == 4)
174	dst[j + aoffset] = src[j + aoffset];
175	}
176
177	srcrow += in->linesize[0];
178	dstrow += out->linesize[0];
179	}
180
181	if (in != out)
182	av_frame_free(&in);
183	return ff_filter_frame(ctx->outputs[0], out);
184	}
185
186	static const AVFilterPad colorbalance_inputs[] = {
187	{
188	.name = "default",
189	.type = AVMEDIA_TYPE_VIDEO,
190	.filter_frame = filter_frame,
191	},
192	{ NULL }
193	};
194
195	static const AVFilterPad colorbalance_outputs[] = {
196	{
197	.name = "default",
198	.type = AVMEDIA_TYPE_VIDEO,
199	.config_props = config_output,
200	},
201	{ NULL }
202	};
203
204	AVFilter ff_vf_colorbalance = {
205	.name = "colorbalance",
206	.description = NULL_IF_CONFIG_SMALL("Adjust the color balance."),
207	.priv_size = sizeof(ColorBalanceContext),
208	.priv_class = &colorbalance_class,
209	.query_formats = query_formats,
210	.inputs = colorbalance_inputs,
211	.outputs = colorbalance_outputs,
212	.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
213	};