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389 lines
13 KiB
C
389 lines
13 KiB
C
/*
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* ColorMatrix v2.2 for Avisynth 2.5.x
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*
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* Copyright (C) 2006-2007 Kevin Stone
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*
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* ColorMatrix 1.x is Copyright (C) Wilbert Dijkhof
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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* License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/**
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* @file
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* ColorMatrix 2.0 is based on the original ColorMatrix filter by Wilbert
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* Dijkhof. It adds the ability to convert between any of: Rec.709, FCC,
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* Rec.601, and SMPTE 240M. It also makes pre and post clipping optional,
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* adds an option to use scaled or non-scaled coefficients, and more...
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*/
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#include <float.h>
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#include "avfilter.h"
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#include "formats.h"
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#include "internal.h"
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#include "video.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/avstring.h"
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#define NS(n) n < 0 ? (int)(n*65536.0-0.5+DBL_EPSILON) : (int)(n*65536.0+0.5)
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#define CB(n) av_clip_uint8(n)
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static const double yuv_coeff[4][3][3] = {
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{ { +0.7152, +0.0722, +0.2126 }, // Rec.709 (0)
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{ -0.3850, +0.5000, -0.1150 },
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{ -0.4540, -0.0460, +0.5000 } },
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{ { +0.5900, +0.1100, +0.3000 }, // FCC (1)
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{ -0.3310, +0.5000, -0.1690 },
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{ -0.4210, -0.0790, +0.5000 } },
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{ { +0.5870, +0.1140, +0.2990 }, // Rec.601 (ITU-R BT.470-2/SMPTE 170M) (2)
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{ -0.3313, +0.5000, -0.1687 },
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{ -0.4187, -0.0813, +0.5000 } },
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{ { +0.7010, +0.0870, +0.2120 }, // SMPTE 240M (3)
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{ -0.3840, +0.5000, -0.1160 },
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{ -0.4450, -0.0550, +0.5000 } },
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};
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typedef struct {
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int yuv_convert[16][3][3];
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int interlaced;
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int source, dest, mode;
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char src[256];
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char dst[256];
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int hsub, vsub;
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} ColorMatrixContext;
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#define ma m[0][0]
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#define mb m[0][1]
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#define mc m[0][2]
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#define md m[1][0]
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#define me m[1][1]
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#define mf m[1][2]
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#define mg m[2][0]
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#define mh m[2][1]
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#define mi m[2][2]
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#define ima im[0][0]
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#define imb im[0][1]
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#define imc im[0][2]
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#define imd im[1][0]
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#define ime im[1][1]
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#define imf im[1][2]
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#define img im[2][0]
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#define imh im[2][1]
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#define imi im[2][2]
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static void inverse3x3(double im[3][3], const double m[3][3])
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{
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double det = ma * (me * mi - mf * mh) - mb * (md * mi - mf * mg) + mc * (md * mh - me * mg);
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det = 1.0 / det;
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ima = det * (me * mi - mf * mh);
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imb = det * (mc * mh - mb * mi);
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imc = det * (mb * mf - mc * me);
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imd = det * (mf * mg - md * mi);
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ime = det * (ma * mi - mc * mg);
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imf = det * (mc * md - ma * mf);
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img = det * (md * mh - me * mg);
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imh = det * (mb * mg - ma * mh);
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imi = det * (ma * me - mb * md);
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}
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static void solve_coefficients(double cm[3][3], double rgb[3][3], const double yuv[3][3])
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{
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int i, j;
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for (i = 0; i < 3; i++)
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for (j = 0; j < 3; j++)
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cm[i][j] = yuv[i][0] * rgb[0][j] + yuv[i][1] * rgb[1][j] + yuv[i][2] * rgb[2][j];
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}
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static void calc_coefficients(AVFilterContext *ctx)
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{
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ColorMatrixContext *color = ctx->priv;
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double rgb_coeffd[4][3][3];
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double yuv_convertd[16][3][3];
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int v = 0;
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int i, j, k;
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for (i = 0; i < 4; i++)
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inverse3x3(rgb_coeffd[i], yuv_coeff[i]);
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for (i = 0; i < 4; i++) {
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for (j = 0; j < 4; j++) {
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solve_coefficients(yuv_convertd[v], rgb_coeffd[i], yuv_coeff[j]);
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for (k = 0; k < 3; k++) {
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color->yuv_convert[v][k][0] = NS(yuv_convertd[v][k][0]);
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color->yuv_convert[v][k][1] = NS(yuv_convertd[v][k][1]);
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color->yuv_convert[v][k][2] = NS(yuv_convertd[v][k][2]);
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}
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if (color->yuv_convert[v][0][0] != 65536 || color->yuv_convert[v][1][0] != 0 ||
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color->yuv_convert[v][2][0] != 0) {
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av_log(ctx, AV_LOG_ERROR, "error calculating conversion coefficients\n");
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}
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v++;
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}
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}
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}
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static const char *color_modes[] = {"bt709", "FCC", "bt601", "smpte240m"};
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static int get_color_mode_index(const char *name)
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{
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int i;
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for (i = 0; i < FF_ARRAY_ELEMS(color_modes); i++)
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if (!av_strcasecmp(color_modes[i], name))
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return i;
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return -1;
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}
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static av_cold int init(AVFilterContext *ctx, const char *args)
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{
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ColorMatrixContext *color = ctx->priv;
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if (!args)
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goto usage;
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if (sscanf(args, "%255[^:]:%255[^:]", color->src, color->dst) != 2) {
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usage:
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av_log(ctx, AV_LOG_ERROR, "usage: <src>:<dst>\n");
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av_log(ctx, AV_LOG_ERROR, "possible options: bt709,bt601,smpte240m,fcc\n");
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return -1;
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}
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color->source = get_color_mode_index(color->src);
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if (color->source < 0) {
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av_log(ctx, AV_LOG_ERROR, "unknown color space %s\n", color->src);
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return AVERROR(EINVAL);
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}
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color->dest = get_color_mode_index(color->dst);
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if (color->dest < 0) {
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av_log(ctx, AV_LOG_ERROR, "unknown color space %s\n", color->dst);
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return AVERROR(EINVAL);
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}
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if (color->source == color->dest) {
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av_log(ctx, AV_LOG_ERROR, "source and destination color space are identical\n");
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return AVERROR(EINVAL);
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}
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color->mode = color->source * 4 + color->dest;
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calc_coefficients(ctx);
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return 0;
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}
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static void process_frame_uyvy422(ColorMatrixContext *color,
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AVFilterBufferRef *dst, AVFilterBufferRef *src)
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{
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const unsigned char *srcp = src->data[0];
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const int src_pitch = src->linesize[0];
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const int height = src->video->h;
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const int width = src->video->w*2;
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unsigned char *dstp = dst->data[0];
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const int dst_pitch = dst->linesize[0];
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const int c2 = color->yuv_convert[color->mode][0][1];
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const int c3 = color->yuv_convert[color->mode][0][2];
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const int c4 = color->yuv_convert[color->mode][1][1];
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const int c5 = color->yuv_convert[color->mode][1][2];
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const int c6 = color->yuv_convert[color->mode][2][1];
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const int c7 = color->yuv_convert[color->mode][2][2];
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int x, y;
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for (y = 0; y < height; y++) {
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for (x = 0; x < width; x += 4) {
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const int u = srcp[x + 0] - 128;
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const int v = srcp[x + 2] - 128;
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const int uvval = c2 * u + c3 * v + 1081344;
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dstp[x + 0] = CB((c4 * u + c5 * v + 8421376) >> 16);
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dstp[x + 1] = CB((65536 * (srcp[x + 1] - 16) + uvval) >> 16);
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dstp[x + 2] = CB((c6 * u + c7 * v + 8421376) >> 16);
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dstp[x + 3] = CB((65536 * (srcp[x + 3] - 16) + uvval) >> 16);
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}
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srcp += src_pitch;
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dstp += dst_pitch;
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}
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}
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static void process_frame_yuv422p(ColorMatrixContext *color,
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AVFilterBufferRef *dst, AVFilterBufferRef *src)
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{
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const unsigned char *srcpU = src->data[1];
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const unsigned char *srcpV = src->data[2];
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const unsigned char *srcpY = src->data[0];
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const int src_pitchY = src->linesize[0];
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const int src_pitchUV = src->linesize[1];
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const int height = src->video->h;
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const int width = src->video->w;
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unsigned char *dstpU = dst->data[1];
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unsigned char *dstpV = dst->data[2];
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unsigned char *dstpY = dst->data[0];
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const int dst_pitchY = dst->linesize[0];
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const int dst_pitchUV = dst->linesize[1];
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const int c2 = color->yuv_convert[color->mode][0][1];
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const int c3 = color->yuv_convert[color->mode][0][2];
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const int c4 = color->yuv_convert[color->mode][1][1];
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const int c5 = color->yuv_convert[color->mode][1][2];
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const int c6 = color->yuv_convert[color->mode][2][1];
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const int c7 = color->yuv_convert[color->mode][2][2];
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int x, y;
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for (y = 0; y < height; y++) {
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for (x = 0; x < width; x += 2) {
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const int u = srcpU[x >> 1] - 128;
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const int v = srcpV[x >> 1] - 128;
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const int uvval = c2 * u + c3 * v + 1081344;
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dstpY[x + 0] = CB((65536 * (srcpY[x + 0] - 16) + uvval) >> 16);
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dstpY[x + 1] = CB((65536 * (srcpY[x + 1] - 16) + uvval) >> 16);
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dstpU[x >> 1] = CB((c4 * u + c5 * v + 8421376) >> 16);
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dstpV[x >> 1] = CB((c6 * u + c7 * v + 8421376) >> 16);
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}
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srcpY += src_pitchY;
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dstpY += dst_pitchY;
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srcpU += src_pitchUV;
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srcpV += src_pitchUV;
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dstpU += dst_pitchUV;
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dstpV += dst_pitchUV;
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}
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}
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static void process_frame_yuv420p(ColorMatrixContext *color,
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AVFilterBufferRef *dst, AVFilterBufferRef *src)
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{
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const unsigned char *srcpU = src->data[1];
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const unsigned char *srcpV = src->data[2];
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const unsigned char *srcpY = src->data[0];
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const unsigned char *srcpN = src->data[0] + src->linesize[0];
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const int src_pitchY = src->linesize[0];
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const int src_pitchUV = src->linesize[1];
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const int height = src->video->h;
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const int width = src->video->w;
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unsigned char *dstpU = dst->data[1];
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unsigned char *dstpV = dst->data[2];
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unsigned char *dstpY = dst->data[0];
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unsigned char *dstpN = dst->data[0] + dst->linesize[0];
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const int dst_pitchY = dst->linesize[0];
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const int dst_pitchUV = dst->linesize[1];
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const int c2 = color->yuv_convert[color->mode][0][1];
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const int c3 = color->yuv_convert[color->mode][0][2];
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const int c4 = color->yuv_convert[color->mode][1][1];
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const int c5 = color->yuv_convert[color->mode][1][2];
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const int c6 = color->yuv_convert[color->mode][2][1];
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const int c7 = color->yuv_convert[color->mode][2][2];
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int x, y;
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for (y = 0; y < height; y += 2) {
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for (x = 0; x < width; x += 2) {
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const int u = srcpU[x >> 1] - 128;
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const int v = srcpV[x >> 1] - 128;
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const int uvval = c2 * u + c3 * v + 1081344;
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dstpY[x + 0] = CB((65536 * (srcpY[x + 0] - 16) + uvval) >> 16);
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dstpY[x + 1] = CB((65536 * (srcpY[x + 1] - 16) + uvval) >> 16);
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dstpN[x + 0] = CB((65536 * (srcpN[x + 0] - 16) + uvval) >> 16);
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dstpN[x + 1] = CB((65536 * (srcpN[x + 1] - 16) + uvval) >> 16);
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dstpU[x >> 1] = CB((c4 * u + c5 * v + 8421376) >> 16);
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dstpV[x >> 1] = CB((c6 * u + c7 * v + 8421376) >> 16);
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}
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srcpY += src_pitchY << 1;
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dstpY += dst_pitchY << 1;
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srcpN += src_pitchY << 1;
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dstpN += dst_pitchY << 1;
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srcpU += src_pitchUV;
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srcpV += src_pitchUV;
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dstpU += dst_pitchUV;
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dstpV += dst_pitchUV;
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}
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}
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static int config_input(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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ColorMatrixContext *color = ctx->priv;
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const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
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color->hsub = pix_desc->log2_chroma_w;
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color->vsub = pix_desc->log2_chroma_h;
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av_log(ctx, AV_LOG_VERBOSE, "%s -> %s\n", color->src, color->dst);
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return 0;
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}
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static int query_formats(AVFilterContext *ctx)
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{
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static const enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_YUV422P,
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AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_UYVY422,
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AV_PIX_FMT_NONE
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};
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ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
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return 0;
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}
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static int filter_frame(AVFilterLink *link, AVFilterBufferRef *in)
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{
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AVFilterContext *ctx = link->dst;
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ColorMatrixContext *color = ctx->priv;
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AVFilterLink *outlink = ctx->outputs[0];
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AVFilterBufferRef *out;
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out = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
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if (!out) {
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avfilter_unref_bufferp(&in);
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return AVERROR(ENOMEM);
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}
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avfilter_copy_buffer_ref_props(out, in);
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if (in->format == AV_PIX_FMT_YUV422P)
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process_frame_yuv422p(color, out, in);
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else if (in->format == AV_PIX_FMT_YUV420P)
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process_frame_yuv420p(color, out, in);
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else
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process_frame_uyvy422(color, out, in);
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avfilter_unref_bufferp(&in);
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return ff_filter_frame(outlink, out);
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}
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static const AVFilterPad colormatrix_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = config_input,
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.min_perms = AV_PERM_READ,
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.filter_frame = filter_frame,
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},
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{ NULL }
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};
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static const AVFilterPad colormatrix_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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},
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{ NULL }
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};
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AVFilter avfilter_vf_colormatrix = {
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.name = "colormatrix",
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.description = NULL_IF_CONFIG_SMALL("Color matrix conversion"),
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.priv_size = sizeof(ColorMatrixContext),
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.init = init,
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.query_formats = query_formats,
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.inputs = colormatrix_inputs,
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.outputs = colormatrix_outputs,
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};
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