WebSVN – Kolibri OS – Blame – /contrib/sdk/sources/ffmpeg/ffmpeg-2.8/libavfilter/vf_colorlevels.c

Rev	Author	Line No.	Line
6147	serge	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/imgutils.h"
		22	#include "libavutil/opt.h"
		23	#include "libavutil/pixdesc.h"
		24	#include "avfilter.h"
		25	#include "drawutils.h"
		26	#include "formats.h"
		27	#include "internal.h"
		28	#include "video.h"
		29
		30	#define R 0
		31	#define G 1
		32	#define B 2
		33	#define A 3
		34
		35	typedef struct {
		36	double in_min, in_max;
		37	double out_min, out_max;
		38	} Range;
		39
		40	typedef struct {
		41	const AVClass *class;
		42	Range range[4];
		43	int nb_comp;
		44	int bpp;
		45	int step;
		46	uint8_t rgba_map[4];
		47	int linesize;
		48	} ColorLevelsContext;
		49
		50	#define OFFSET(x) offsetof(ColorLevelsContext, x)
		51	#define FLAGS AV_OPT_FLAG_FILTERING_PARAM\|AV_OPT_FLAG_VIDEO_PARAM
		52	static const AVOption colorlevels_options[] = {
		53	{ "rimin", "set input red black point", OFFSET(range[R].in_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
		54	{ "gimin", "set input green black point", OFFSET(range[G].in_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
		55	{ "bimin", "set input blue black point", OFFSET(range[B].in_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
		56	{ "aimin", "set input alpha black point", OFFSET(range[A].in_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
		57	{ "rimax", "set input red white point", OFFSET(range[R].in_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -1, 1, FLAGS },
		58	{ "gimax", "set input green white point", OFFSET(range[G].in_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -1, 1, FLAGS },
		59	{ "bimax", "set input blue white point", OFFSET(range[B].in_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -1, 1, FLAGS },
		60	{ "aimax", "set input alpha white point", OFFSET(range[A].in_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -1, 1, FLAGS },
		61	{ "romin", "set output red black point", OFFSET(range[R].out_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS },
		62	{ "gomin", "set output green black point", OFFSET(range[G].out_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS },
		63	{ "bomin", "set output blue black point", OFFSET(range[B].out_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS },
		64	{ "aomin", "set output alpha black point", OFFSET(range[A].out_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS },
		65	{ "romax", "set output red white point", OFFSET(range[R].out_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
		66	{ "gomax", "set output green white point", OFFSET(range[G].out_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
		67	{ "bomax", "set output blue white point", OFFSET(range[B].out_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
		68	{ "aomax", "set output alpha white point", OFFSET(range[A].out_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
		69	{ NULL }
		70	};
		71
		72	AVFILTER_DEFINE_CLASS(colorlevels);
		73
		74	static int query_formats(AVFilterContext *ctx)
		75	{
		76	static const enum AVPixelFormat pix_fmts[] = {
		77	AV_PIX_FMT_0RGB, AV_PIX_FMT_0BGR,
		78	AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
		79	AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0,
		80	AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
		81	AV_PIX_FMT_RGB48, AV_PIX_FMT_BGR48,
		82	AV_PIX_FMT_RGBA64, AV_PIX_FMT_BGRA64,
		83	AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
		84	AV_PIX_FMT_NONE
		85	};
		86
		87	AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
		88	if (!fmts_list)
		89	return AVERROR(ENOMEM);
		90	return ff_set_common_formats(ctx, fmts_list);
		91	}
		92
		93	static int config_input(AVFilterLink *inlink)
		94	{
		95	AVFilterContext *ctx = inlink->dst;
		96	ColorLevelsContext *s = ctx->priv;
		97	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
		98
		99	s->nb_comp = desc->nb_components;
		100	s->bpp = (desc->comp[0].depth_minus1 + 1) >> 3;
		101	s->step = (av_get_padded_bits_per_pixel(desc) >> 3) / s->bpp;
		102	s->linesize = inlink->w * s->step;
		103	ff_fill_rgba_map(s->rgba_map, inlink->format);
		104
		105	return 0;
		106	}
		107
		108	static int filter_frame(AVFilterLink inlink, AVFrame in)
		109	{
		110	AVFilterContext *ctx = inlink->dst;
		111	ColorLevelsContext *s = ctx->priv;
		112	AVFilterLink *outlink = ctx->outputs[0];
		113	const int step = s->step;
		114	AVFrame *out;
		115	int x, y, i;
		116
		117	if (av_frame_is_writable(in)) {
		118	out = in;
		119	} else {
		120	out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
		121	if (!out) {
		122	av_frame_free(&in);
		123	return AVERROR(ENOMEM);
		124	}
		125	av_frame_copy_props(out, in);
		126	}
		127
		128	switch (s->bpp) {
		129	case 1:
		130	for (i = 0; i < s->nb_comp; i++) {
		131	Range *r = &s->range[i];
		132	const uint8_t offset = s->rgba_map[i];
		133	const uint8_t *srcrow = in->data[0];
		134	uint8_t *dstrow = out->data[0];
		135	int imin = round(r->in_min * UINT8_MAX);
		136	int imax = round(r->in_max * UINT8_MAX);
		137	int omin = round(r->out_min * UINT8_MAX);
		138	int omax = round(r->out_max * UINT8_MAX);
		139	double coeff;
		140
		141	if (imin < 0) {
		142	imin = UINT8_MAX;
		143	for (y = 0; y < inlink->h; y++) {
		144	const uint8_t *src = srcrow;
		145
		146	for (x = 0; x < s->linesize; x += step)
		147	imin = FFMIN(imin, src[x + offset]);
		148	srcrow += in->linesize[0];
		149	}
		150	}
		151	if (imax < 0) {
		152	srcrow = in->data[0];
		153	imax = 0;
		154	for (y = 0; y < inlink->h; y++) {
		155	const uint8_t *src = srcrow;
		156
		157	for (x = 0; x < s->linesize; x += step)
		158	imax = FFMAX(imax, src[x + offset]);
		159	srcrow += in->linesize[0];
		160	}
		161	}
		162
		163	srcrow = in->data[0];
		164	coeff = (omax - omin) / (double)(imax - imin);
		165	for (y = 0; y < inlink->h; y++) {
		166	const uint8_t *src = srcrow;
		167	uint8_t *dst = dstrow;
		168
		169	for (x = 0; x < s->linesize; x += step)
		170	dst[x + offset] = av_clip_uint8((src[x + offset] - imin) * coeff + omin);
		171	dstrow += out->linesize[0];
		172	srcrow += in->linesize[0];
		173	}
		174	}
		175	break;
		176	case 2:
		177	for (i = 0; i < s->nb_comp; i++) {
		178	Range *r = &s->range[i];
		179	const uint8_t offset = s->rgba_map[i];
		180	const uint8_t *srcrow = in->data[0];
		181	uint8_t *dstrow = out->data[0];
		182	int imin = round(r->in_min * UINT16_MAX);
		183	int imax = round(r->in_max * UINT16_MAX);
		184	int omin = round(r->out_min * UINT16_MAX);
		185	int omax = round(r->out_max * UINT16_MAX);
		186	double coeff;
		187
		188	if (imin < 0) {
		189	imin = UINT16_MAX;
		190	for (y = 0; y < inlink->h; y++) {
		191	const uint16_t src = (const uint16_t )srcrow;
		192
		193	for (x = 0; x < s->linesize; x += step)
		194	imin = FFMIN(imin, src[x + offset]);
		195	srcrow += in->linesize[0];
		196	}
		197	}
		198	if (imax < 0) {
		199	srcrow = in->data[0];
		200	imax = 0;
		201	for (y = 0; y < inlink->h; y++) {
		202	const uint16_t src = (const uint16_t )srcrow;
		203
		204	for (x = 0; x < s->linesize; x += step)
		205	imax = FFMAX(imax, src[x + offset]);
		206	srcrow += in->linesize[0];
		207	}
		208	}
		209
		210	srcrow = in->data[0];
		211	coeff = (omax - omin) / (double)(imax - imin);
		212	for (y = 0; y < inlink->h; y++) {
		213	const uint16_t src = (const uint16_t)srcrow;
		214	uint16_t dst = (uint16_t )dstrow;
		215
		216	for (x = 0; x < s->linesize; x += step)
		217	dst[x + offset] = av_clip_uint16((src[x + offset] - imin) * coeff + omin);
		218	dstrow += out->linesize[0];
		219	srcrow += in->linesize[0];
		220	}
		221	}
		222	}
		223
		224	if (in != out)
		225	av_frame_free(&in);
		226	return ff_filter_frame(outlink, out);
		227	}
		228
		229	static const AVFilterPad colorlevels_inputs[] = {
		230	{
		231	.name = "default",
		232	.type = AVMEDIA_TYPE_VIDEO,
		233	.filter_frame = filter_frame,
		234	.config_props = config_input,
		235	},
		236	{ NULL }
		237	};
		238
		239	static const AVFilterPad colorlevels_outputs[] = {
		240	{
		241	.name = "default",
		242	.type = AVMEDIA_TYPE_VIDEO,
		243	},
		244	{ NULL }
		245	};
		246
		247	AVFilter ff_vf_colorlevels = {
		248	.name = "colorlevels",
		249	.description = NULL_IF_CONFIG_SMALL("Adjust the color levels."),
		250	.priv_size = sizeof(ColorLevelsContext),
		251	.priv_class = &colorlevels_class,
		252	.query_formats = query_formats,
		253	.inputs = colorlevels_inputs,
		254	.outputs = colorlevels_outputs,
		255	.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
		256	};

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(root)/contrib/sdk/sources/ffmpeg/ffmpeg-2.8/libavfilter/vf_colorlevels.c @ 6605 – Rev 6147