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vf_colormatrix.c
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1 /*
2  * ColorMatrix v2.2 for Avisynth 2.5.x
3  *
4  * Copyright (C) 2006-2007 Kevin Stone
5  *
6  * ColorMatrix 1.x is Copyright (C) Wilbert Dijkhof
7  *
8  * This program is free software; you can redistribute it and/or modify it
9  * under the terms of the GNU General Public License as published by the
10  * Free Software Foundation; either version 2 of the License, or (at your
11  * option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful, but
14  * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
16  * License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software Foundation,
20  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * ColorMatrix 2.0 is based on the original ColorMatrix filter by Wilbert
26  * Dijkhof. It adds the ability to convert between any of: Rec.709, FCC,
27  * Rec.601, and SMPTE 240M. It also makes pre and post clipping optional,
28  * adds an option to use scaled or non-scaled coefficients, and more...
29  */
30 
31 #include <float.h>
32 #include "avfilter.h"
33 #include "formats.h"
34 #include "internal.h"
35 #include "video.h"
36 #include "libavutil/opt.h"
37 #include "libavutil/pixdesc.h"
38 #include "libavutil/avstring.h"
39 
40 #define NS(n) ((n) < 0 ? (int)((n)*65536.0-0.5+DBL_EPSILON) : (int)((n)*65536.0+0.5))
41 #define CB(n) av_clip_uint8(n)
42 
43 static const double yuv_coeff[4][3][3] = {
44  { { +0.7152, +0.0722, +0.2126 }, // Rec.709 (0)
45  { -0.3850, +0.5000, -0.1150 },
46  { -0.4540, -0.0460, +0.5000 } },
47  { { +0.5900, +0.1100, +0.3000 }, // FCC (1)
48  { -0.3310, +0.5000, -0.1690 },
49  { -0.4210, -0.0790, +0.5000 } },
50  { { +0.5870, +0.1140, +0.2990 }, // Rec.601 (ITU-R BT.470-2/SMPTE 170M) (2)
51  { -0.3313, +0.5000, -0.1687 },
52  { -0.4187, -0.0813, +0.5000 } },
53  { { +0.7010, +0.0870, +0.2120 }, // SMPTE 240M (3)
54  { -0.3840, +0.5000, -0.1160 },
55  { -0.4450, -0.0550, +0.5000 } },
56 };
57 
58 enum ColorMode {
65 };
66 
67 typedef struct {
68  const AVClass *class;
69  int yuv_convert[16][3][3];
71  enum ColorMode source, dest;
72  int mode;
73  int hsub, vsub;
75 
76 #define OFFSET(x) offsetof(ColorMatrixContext, x)
77 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
78 
79 static const AVOption colormatrix_options[] = {
80  { "src", "set source color matrix", OFFSET(source), AV_OPT_TYPE_INT, {.i64=COLOR_MODE_NONE}, COLOR_MODE_NONE, COLOR_MODE_COUNT-1, .flags=FLAGS, .unit="color_mode" },
81  { "dst", "set destination color matrix", OFFSET(dest), AV_OPT_TYPE_INT, {.i64=COLOR_MODE_NONE}, COLOR_MODE_NONE, COLOR_MODE_COUNT-1, .flags=FLAGS, .unit="color_mode" },
82  { "bt709", "set BT.709 colorspace", 0, AV_OPT_TYPE_CONST, {.i64=COLOR_MODE_BT709}, .flags=FLAGS, .unit="color_mode" },
83  { "fcc", "set FCC colorspace ", 0, AV_OPT_TYPE_CONST, {.i64=COLOR_MODE_FCC}, .flags=FLAGS, .unit="color_mode" },
84  { "bt601", "set BT.601 colorspace", 0, AV_OPT_TYPE_CONST, {.i64=COLOR_MODE_BT601}, .flags=FLAGS, .unit="color_mode" },
85  { "smpte240m", "set SMPTE-240M colorspace", 0, AV_OPT_TYPE_CONST, {.i64=COLOR_MODE_SMPTE240M}, .flags=FLAGS, .unit="color_mode" },
86  { NULL }
87 };
88 
89 AVFILTER_DEFINE_CLASS(colormatrix);
90 
91 #define ma m[0][0]
92 #define mb m[0][1]
93 #define mc m[0][2]
94 #define md m[1][0]
95 #define me m[1][1]
96 #define mf m[1][2]
97 #define mg m[2][0]
98 #define mh m[2][1]
99 #define mi m[2][2]
100 
101 #define ima im[0][0]
102 #define imb im[0][1]
103 #define imc im[0][2]
104 #define imd im[1][0]
105 #define ime im[1][1]
106 #define imf im[1][2]
107 #define img im[2][0]
108 #define imh im[2][1]
109 #define imi im[2][2]
110 
111 static void inverse3x3(double im[3][3], const double m[3][3])
112 {
113  double det = ma * (me * mi - mf * mh) - mb * (md * mi - mf * mg) + mc * (md * mh - me * mg);
114  det = 1.0 / det;
115  ima = det * (me * mi - mf * mh);
116  imb = det * (mc * mh - mb * mi);
117  imc = det * (mb * mf - mc * me);
118  imd = det * (mf * mg - md * mi);
119  ime = det * (ma * mi - mc * mg);
120  imf = det * (mc * md - ma * mf);
121  img = det * (md * mh - me * mg);
122  imh = det * (mb * mg - ma * mh);
123  imi = det * (ma * me - mb * md);
124 }
125 
126 static void solve_coefficients(double cm[3][3], double rgb[3][3], const double yuv[3][3])
127 {
128  int i, j;
129  for (i = 0; i < 3; i++)
130  for (j = 0; j < 3; j++)
131  cm[i][j] = yuv[i][0] * rgb[0][j] + yuv[i][1] * rgb[1][j] + yuv[i][2] * rgb[2][j];
132 }
133 
135 {
136  ColorMatrixContext *color = ctx->priv;
137  double rgb_coeffd[4][3][3];
138  double yuv_convertd[16][3][3];
139  int v = 0;
140  int i, j, k;
141 
142  for (i = 0; i < 4; i++)
143  inverse3x3(rgb_coeffd[i], yuv_coeff[i]);
144  for (i = 0; i < 4; i++) {
145  for (j = 0; j < 4; j++) {
146  solve_coefficients(yuv_convertd[v], rgb_coeffd[i], yuv_coeff[j]);
147  for (k = 0; k < 3; k++) {
148  color->yuv_convert[v][k][0] = NS(yuv_convertd[v][k][0]);
149  color->yuv_convert[v][k][1] = NS(yuv_convertd[v][k][1]);
150  color->yuv_convert[v][k][2] = NS(yuv_convertd[v][k][2]);
151  }
152  if (color->yuv_convert[v][0][0] != 65536 || color->yuv_convert[v][1][0] != 0 ||
153  color->yuv_convert[v][2][0] != 0) {
154  av_log(ctx, AV_LOG_ERROR, "error calculating conversion coefficients\n");
155  }
156  v++;
157  }
158  }
159 }
160 
161 static const char *color_modes[] = {"bt709", "fcc", "bt601", "smpte240m"};
162 
163 static av_cold int init(AVFilterContext *ctx)
164 {
165  ColorMatrixContext *color = ctx->priv;
166 
167  if (color->dest == COLOR_MODE_NONE) {
168  av_log(ctx, AV_LOG_ERROR, "Unspecified destination color space\n");
169  return AVERROR(EINVAL);
170  }
171 
172  if (color->source == color->dest) {
173  av_log(ctx, AV_LOG_ERROR, "Source and destination color space must not be identical\n");
174  return AVERROR(EINVAL);
175  }
176 
177  return 0;
178 }
179 
181  AVFrame *dst, AVFrame *src)
182 {
183  const unsigned char *srcp = src->data[0];
184  const int src_pitch = src->linesize[0];
185  const int height = src->height;
186  const int width = src->width*2;
187  unsigned char *dstp = dst->data[0];
188  const int dst_pitch = dst->linesize[0];
189  const int c2 = color->yuv_convert[color->mode][0][1];
190  const int c3 = color->yuv_convert[color->mode][0][2];
191  const int c4 = color->yuv_convert[color->mode][1][1];
192  const int c5 = color->yuv_convert[color->mode][1][2];
193  const int c6 = color->yuv_convert[color->mode][2][1];
194  const int c7 = color->yuv_convert[color->mode][2][2];
195  int x, y;
196 
197  for (y = 0; y < height; y++) {
198  for (x = 0; x < width; x += 4) {
199  const int u = srcp[x + 0] - 128;
200  const int v = srcp[x + 2] - 128;
201  const int uvval = c2 * u + c3 * v + 1081344;
202  dstp[x + 0] = CB((c4 * u + c5 * v + 8421376) >> 16);
203  dstp[x + 1] = CB((65536 * (srcp[x + 1] - 16) + uvval) >> 16);
204  dstp[x + 2] = CB((c6 * u + c7 * v + 8421376) >> 16);
205  dstp[x + 3] = CB((65536 * (srcp[x + 3] - 16) + uvval) >> 16);
206  }
207  srcp += src_pitch;
208  dstp += dst_pitch;
209  }
210 }
211 
213  AVFrame *dst, AVFrame *src)
214 {
215  const unsigned char *srcpU = src->data[1];
216  const unsigned char *srcpV = src->data[2];
217  const unsigned char *srcpY = src->data[0];
218  const int src_pitchY = src->linesize[0];
219  const int src_pitchUV = src->linesize[1];
220  const int height = src->height;
221  const int width = src->width;
222  unsigned char *dstpU = dst->data[1];
223  unsigned char *dstpV = dst->data[2];
224  unsigned char *dstpY = dst->data[0];
225  const int dst_pitchY = dst->linesize[0];
226  const int dst_pitchUV = dst->linesize[1];
227  const int c2 = color->yuv_convert[color->mode][0][1];
228  const int c3 = color->yuv_convert[color->mode][0][2];
229  const int c4 = color->yuv_convert[color->mode][1][1];
230  const int c5 = color->yuv_convert[color->mode][1][2];
231  const int c6 = color->yuv_convert[color->mode][2][1];
232  const int c7 = color->yuv_convert[color->mode][2][2];
233  int x, y;
234 
235  for (y = 0; y < height; y++) {
236  for (x = 0; x < width; x += 2) {
237  const int u = srcpU[x >> 1] - 128;
238  const int v = srcpV[x >> 1] - 128;
239  const int uvval = c2 * u + c3 * v + 1081344;
240  dstpY[x + 0] = CB((65536 * (srcpY[x + 0] - 16) + uvval) >> 16);
241  dstpY[x + 1] = CB((65536 * (srcpY[x + 1] - 16) + uvval) >> 16);
242  dstpU[x >> 1] = CB((c4 * u + c5 * v + 8421376) >> 16);
243  dstpV[x >> 1] = CB((c6 * u + c7 * v + 8421376) >> 16);
244  }
245  srcpY += src_pitchY;
246  dstpY += dst_pitchY;
247  srcpU += src_pitchUV;
248  srcpV += src_pitchUV;
249  dstpU += dst_pitchUV;
250  dstpV += dst_pitchUV;
251  }
252 }
253 
255  AVFrame *dst, AVFrame *src)
256 {
257  const unsigned char *srcpU = src->data[1];
258  const unsigned char *srcpV = src->data[2];
259  const unsigned char *srcpY = src->data[0];
260  const unsigned char *srcpN = src->data[0] + src->linesize[0];
261  const int src_pitchY = src->linesize[0];
262  const int src_pitchUV = src->linesize[1];
263  const int height = src->height;
264  const int width = src->width;
265  unsigned char *dstpU = dst->data[1];
266  unsigned char *dstpV = dst->data[2];
267  unsigned char *dstpY = dst->data[0];
268  unsigned char *dstpN = dst->data[0] + dst->linesize[0];
269  const int dst_pitchY = dst->linesize[0];
270  const int dst_pitchUV = dst->linesize[1];
271  const int c2 = color->yuv_convert[color->mode][0][1];
272  const int c3 = color->yuv_convert[color->mode][0][2];
273  const int c4 = color->yuv_convert[color->mode][1][1];
274  const int c5 = color->yuv_convert[color->mode][1][2];
275  const int c6 = color->yuv_convert[color->mode][2][1];
276  const int c7 = color->yuv_convert[color->mode][2][2];
277  int x, y;
278 
279  for (y = 0; y < height; y += 2) {
280  for (x = 0; x < width; x += 2) {
281  const int u = srcpU[x >> 1] - 128;
282  const int v = srcpV[x >> 1] - 128;
283  const int uvval = c2 * u + c3 * v + 1081344;
284  dstpY[x + 0] = CB((65536 * (srcpY[x + 0] - 16) + uvval) >> 16);
285  dstpY[x + 1] = CB((65536 * (srcpY[x + 1] - 16) + uvval) >> 16);
286  dstpN[x + 0] = CB((65536 * (srcpN[x + 0] - 16) + uvval) >> 16);
287  dstpN[x + 1] = CB((65536 * (srcpN[x + 1] - 16) + uvval) >> 16);
288  dstpU[x >> 1] = CB((c4 * u + c5 * v + 8421376) >> 16);
289  dstpV[x >> 1] = CB((c6 * u + c7 * v + 8421376) >> 16);
290  }
291  srcpY += src_pitchY << 1;
292  dstpY += dst_pitchY << 1;
293  srcpN += src_pitchY << 1;
294  dstpN += dst_pitchY << 1;
295  srcpU += src_pitchUV;
296  srcpV += src_pitchUV;
297  dstpU += dst_pitchUV;
298  dstpV += dst_pitchUV;
299  }
300 }
301 
302 static int config_input(AVFilterLink *inlink)
303 {
304  AVFilterContext *ctx = inlink->dst;
305  ColorMatrixContext *color = ctx->priv;
306  const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
307 
308  color->hsub = pix_desc->log2_chroma_w;
309  color->vsub = pix_desc->log2_chroma_h;
310 
311  av_log(ctx, AV_LOG_VERBOSE, "%s -> %s\n",
312  color_modes[color->source], color_modes[color->dest]);
313 
314  return 0;
315 }
316 
318 {
319  static const enum AVPixelFormat pix_fmts[] = {
324  };
325 
327 
328  return 0;
329 }
330 
331 static int filter_frame(AVFilterLink *link, AVFrame *in)
332 {
333  AVFilterContext *ctx = link->dst;
334  ColorMatrixContext *color = ctx->priv;
335  AVFilterLink *outlink = ctx->outputs[0];
336  AVFrame *out;
337 
338  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
339  if (!out) {
340  av_frame_free(&in);
341  return AVERROR(ENOMEM);
342  }
343  av_frame_copy_props(out, in);
344 
345  if (color->source == COLOR_MODE_NONE) {
347  enum ColorMode source;
348 
349  switch(cs) {
350  case AVCOL_SPC_BT709 : source = COLOR_MODE_BT709 ; break;
351  case AVCOL_SPC_FCC : source = COLOR_MODE_FCC ; break;
352  case AVCOL_SPC_SMPTE240M : source = COLOR_MODE_SMPTE240M ; break;
353  case AVCOL_SPC_BT470BG : source = COLOR_MODE_BT601 ; break;
354  default :
355  av_log(ctx, AV_LOG_ERROR, "Input frame does not specify a supported colorspace, and none has been specified as source either\n");
356  av_frame_free(&out);
357  return AVERROR(EINVAL);
358  }
359  color->mode = source * 4 + color->dest;
360  } else
361  color->mode = color->source * 4 + color->dest;
362 
363  switch(color->dest) {
368  }
369 
370  calc_coefficients(ctx);
371 
372  if (in->format == AV_PIX_FMT_YUV422P)
373  process_frame_yuv422p(color, out, in);
374  else if (in->format == AV_PIX_FMT_YUV420P)
375  process_frame_yuv420p(color, out, in);
376  else
377  process_frame_uyvy422(color, out, in);
378 
379  av_frame_free(&in);
380  return ff_filter_frame(outlink, out);
381 }
382 
383 static const AVFilterPad colormatrix_inputs[] = {
384  {
385  .name = "default",
386  .type = AVMEDIA_TYPE_VIDEO,
387  .config_props = config_input,
388  .filter_frame = filter_frame,
389  },
390  { NULL }
391 };
392 
394  {
395  .name = "default",
396  .type = AVMEDIA_TYPE_VIDEO,
397  },
398  { NULL }
399 };
400 
402  .name = "colormatrix",
403  .description = NULL_IF_CONFIG_SMALL("Convert color matrix."),
404  .priv_size = sizeof(ColorMatrixContext),
405  .init = init,
407  .inputs = colormatrix_inputs,
408  .outputs = colormatrix_outputs,
409  .priv_class = &colormatrix_class,
411 };