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vf_stereo3d.c
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1 /*
2  * Copyright (c) 2010 Gordon Schmidt <gordon.schmidt <at> s2000.tu-chemnitz.de>
3  * Copyright (c) 2013 Paul B Mahol
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public
9  * License as published by the Free Software Foundation; either
10  * version 2 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License along
18  * with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/avassert.h"
23 #include "libavutil/imgutils.h"
24 #include "libavutil/opt.h"
25 #include "libavutil/parseutils.h"
26 #include "libavutil/pixdesc.h"
27 #include "avfilter.h"
28 #include "formats.h"
29 #include "internal.h"
30 #include "video.h"
31 
32 enum StereoCode {
33  ANAGLYPH_RC_GRAY, // anaglyph red/cyan gray
34  ANAGLYPH_RC_HALF, // anaglyph red/cyan half colored
35  ANAGLYPH_RC_COLOR, // anaglyph red/cyan colored
36  ANAGLYPH_RC_DUBOIS, // anaglyph red/cyan dubois
37  ANAGLYPH_GM_GRAY, // anaglyph green/magenta gray
38  ANAGLYPH_GM_HALF, // anaglyph green/magenta half colored
39  ANAGLYPH_GM_COLOR, // anaglyph green/magenta colored
40  ANAGLYPH_GM_DUBOIS, // anaglyph green/magenta dubois
41  ANAGLYPH_YB_GRAY, // anaglyph yellow/blue gray
42  ANAGLYPH_YB_HALF, // anaglyph yellow/blue half colored
43  ANAGLYPH_YB_COLOR, // anaglyph yellow/blue colored
44  ANAGLYPH_YB_DUBOIS, // anaglyph yellow/blue dubois
45  ANAGLYPH_RB_GRAY, // anaglyph red/blue gray
46  ANAGLYPH_RG_GRAY, // anaglyph red/green gray
47  MONO_L, // mono output for debugging (left eye only)
48  MONO_R, // mono output for debugging (right eye only)
49  INTERLEAVE_ROWS_LR, // row-interleave (left eye has top row)
50  INTERLEAVE_ROWS_RL, // row-interleave (right eye has top row)
51  SIDE_BY_SIDE_LR, // side by side parallel (left eye left, right eye right)
52  SIDE_BY_SIDE_RL, // side by side crosseye (right eye left, left eye right)
53  SIDE_BY_SIDE_2_LR, // side by side parallel with half width resolution
54  SIDE_BY_SIDE_2_RL, // side by side crosseye with half width resolution
55  ABOVE_BELOW_LR, // above-below (left eye above, right eye below)
56  ABOVE_BELOW_RL, // above-below (right eye above, left eye below)
57  ABOVE_BELOW_2_LR, // above-below with half height resolution
58  ABOVE_BELOW_2_RL, // above-below with half height resolution
59  ALTERNATING_LR, // alternating frames (left eye first, right eye second)
60  ALTERNATING_RL, // alternating frames (right eye first, left eye second)
61  STEREO_CODE_COUNT // TODO: needs autodetection
62 };
63 
64 typedef struct StereoComponent {
65  enum StereoCode format;
66  int width, height;
67  int off_left, off_right;
68  int off_lstep, off_rstep;
69  int row_left, row_right;
70 } StereoComponent;
71 
72 static const int ana_coeff[][3][6] = {
73  [ANAGLYPH_RB_GRAY] =
74  {{19595, 38470, 7471, 0, 0, 0},
75  { 0, 0, 0, 0, 0, 0},
76  { 0, 0, 0, 19595, 38470, 7471}},
77  [ANAGLYPH_RG_GRAY] =
78  {{19595, 38470, 7471, 0, 0, 0},
79  { 0, 0, 0, 19595, 38470, 7471},
80  { 0, 0, 0, 0, 0, 0}},
81  [ANAGLYPH_RC_GRAY] =
82  {{19595, 38470, 7471, 0, 0, 0},
83  { 0, 0, 0, 19595, 38470, 7471},
84  { 0, 0, 0, 19595, 38470, 7471}},
85  [ANAGLYPH_RC_HALF] =
86  {{19595, 38470, 7471, 0, 0, 0},
87  { 0, 0, 0, 0, 65536, 0},
88  { 0, 0, 0, 0, 0, 65536}},
89  [ANAGLYPH_RC_COLOR] =
90  {{65536, 0, 0, 0, 0, 0},
91  { 0, 0, 0, 0, 65536, 0},
92  { 0, 0, 0, 0, 0, 65536}},
93  [ANAGLYPH_RC_DUBOIS] =
94  {{29891, 32800, 11559, -2849, -5763, -102},
95  {-2627, -2479, -1033, 24804, 48080, -1209},
96  { -997, -1350, -358, -4729, -7403, 80373}},
97  [ANAGLYPH_GM_GRAY] =
98  {{ 0, 0, 0, 19595, 38470, 7471},
99  {19595, 38470, 7471, 0, 0, 0},
100  { 0, 0, 0, 19595, 38470, 7471}},
101  [ANAGLYPH_GM_HALF] =
102  {{ 0, 0, 0, 65536, 0, 0},
103  {19595, 38470, 7471, 0, 0, 0},
104  { 0, 0, 0, 0, 0, 65536}},
105  [ANAGLYPH_GM_COLOR] =
106  {{ 0, 0, 0, 65536, 0, 0},
107  { 0, 65536, 0, 0, 0, 0},
108  { 0, 0, 0, 0, 0, 65536}},
109  [ANAGLYPH_GM_DUBOIS] =
110  {{-4063,-10354, -2556, 34669, 46203, 1573},
111  {18612, 43778, 9372, -1049, -983, -4260},
112  { -983, -1769, 1376, 590, 4915, 61407}},
113  [ANAGLYPH_YB_GRAY] =
114  {{ 0, 0, 0, 19595, 38470, 7471},
115  { 0, 0, 0, 19595, 38470, 7471},
116  {19595, 38470, 7471, 0, 0, 0}},
117  [ANAGLYPH_YB_HALF] =
118  {{ 0, 0, 0, 65536, 0, 0},
119  { 0, 0, 0, 0, 65536, 0},
120  {19595, 38470, 7471, 0, 0, 0}},
121  [ANAGLYPH_YB_COLOR] =
122  {{ 0, 0, 0, 65536, 0, 0},
123  { 0, 0, 0, 0, 65536, 0},
124  { 0, 0, 65536, 0, 0, 0}},
125  [ANAGLYPH_YB_DUBOIS] =
126  {{65535,-12650,18451, -987, -7590, -1049},
127  {-1604, 56032, 4196, 370, 3826, -1049},
128  {-2345,-10676, 1358, 5801, 11416, 56217}},
129 };
130 
131 typedef struct Stereo3DContext {
132  const AVClass *class;
133  StereoComponent in, out;
134  int width, height;
135  int row_step;
136  int ana_matrix[3][6];
137  int nb_planes;
138  int linesize[4];
139  int pixstep[4];
140  AVFrame *prev;
141  double ts_unit;
142 } Stereo3DContext;
143 
144 #define OFFSET(x) offsetof(Stereo3DContext, x)
145 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
146 
147 static const AVOption stereo3d_options[] = {
148  { "in", "set input format", OFFSET(in.format), AV_OPT_TYPE_INT, {.i64=SIDE_BY_SIDE_LR}, SIDE_BY_SIDE_LR, STEREO_CODE_COUNT-1, FLAGS, "in"},
149  { "ab2l", "above below half height left first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_2_LR}, 0, 0, FLAGS, "in" },
150  { "ab2r", "above below half height right first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_2_RL}, 0, 0, FLAGS, "in" },
151  { "abl", "above below left first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_LR}, 0, 0, FLAGS, "in" },
152  { "abr", "above below right first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_RL}, 0, 0, FLAGS, "in" },
153  { "al", "alternating frames left first", 0, AV_OPT_TYPE_CONST, {.i64=ALTERNATING_LR}, 0, 0, FLAGS, "in" },
154  { "ar", "alternating frames right first", 0, AV_OPT_TYPE_CONST, {.i64=ALTERNATING_RL}, 0, 0, FLAGS, "in" },
155  { "sbs2l", "side by side half width left first", 0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_2_LR}, 0, 0, FLAGS, "in" },
156  { "sbs2r", "side by side half width right first", 0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_2_RL}, 0, 0, FLAGS, "in" },
157  { "sbsl", "side by side left first", 0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_LR}, 0, 0, FLAGS, "in" },
158  { "sbsr", "side by side right first", 0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_RL}, 0, 0, FLAGS, "in" },
159  { "out", "set output format", OFFSET(out.format), AV_OPT_TYPE_INT, {.i64=ANAGLYPH_RC_DUBOIS}, 0, STEREO_CODE_COUNT-1, FLAGS, "out"},
160  { "ab2l", "above below half height left first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_2_LR}, 0, 0, FLAGS, "out" },
161  { "ab2r", "above below half height right first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_2_RL}, 0, 0, FLAGS, "out" },
162  { "abl", "above below left first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_LR}, 0, 0, FLAGS, "out" },
163  { "abr", "above below right first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_RL}, 0, 0, FLAGS, "out" },
164  { "agmc", "anaglyph green magenta color", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_GM_COLOR}, 0, 0, FLAGS, "out" },
165  { "agmd", "anaglyph green magenta dubois", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_GM_DUBOIS}, 0, 0, FLAGS, "out" },
166  { "agmg", "anaglyph green magenta gray", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_GM_GRAY}, 0, 0, FLAGS, "out" },
167  { "agmh", "anaglyph green magenta half color", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_GM_HALF}, 0, 0, FLAGS, "out" },
168  { "al", "alternating frames left first", 0, AV_OPT_TYPE_CONST, {.i64=ALTERNATING_LR}, 0, 0, FLAGS, "out" },
169  { "ar", "alternating frames right first", 0, AV_OPT_TYPE_CONST, {.i64=ALTERNATING_RL}, 0, 0, FLAGS, "out" },
170  { "arbg", "anaglyph red blue gray", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_RB_GRAY}, 0, 0, FLAGS, "out" },
171  { "arcc", "anaglyph red cyan color", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_RC_COLOR}, 0, 0, FLAGS, "out" },
172  { "arcd", "anaglyph red cyan dubois", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_RC_DUBOIS}, 0, 0, FLAGS, "out" },
173  { "arcg", "anaglyph red cyan gray", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_RC_GRAY}, 0, 0, FLAGS, "out" },
174  { "arch", "anaglyph red cyan half color", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_RC_HALF}, 0, 0, FLAGS, "out" },
175  { "argg", "anaglyph red green gray", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_RG_GRAY}, 0, 0, FLAGS, "out" },
176  { "aybc", "anaglyph yellow blue color", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_YB_COLOR}, 0, 0, FLAGS, "out" },
177  { "aybd", "anaglyph yellow blue dubois", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_YB_DUBOIS}, 0, 0, FLAGS, "out" },
178  { "aybg", "anaglyph yellow blue gray", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_YB_GRAY}, 0, 0, FLAGS, "out" },
179  { "aybh", "anaglyph yellow blue half color", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_YB_HALF}, 0, 0, FLAGS, "out" },
180  { "irl", "interleave rows left first", 0, AV_OPT_TYPE_CONST, {.i64=INTERLEAVE_ROWS_LR}, 0, 0, FLAGS, "out" },
181  { "irr", "interleave rows right first", 0, AV_OPT_TYPE_CONST, {.i64=INTERLEAVE_ROWS_RL}, 0, 0, FLAGS, "out" },
182  { "ml", "mono left", 0, AV_OPT_TYPE_CONST, {.i64=MONO_L}, 0, 0, FLAGS, "out" },
183  { "mr", "mono right", 0, AV_OPT_TYPE_CONST, {.i64=MONO_R}, 0, 0, FLAGS, "out" },
184  { "sbs2l", "side by side half width left first", 0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_2_LR}, 0, 0, FLAGS, "out" },
185  { "sbs2r", "side by side half width right first", 0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_2_RL}, 0, 0, FLAGS, "out" },
186  { "sbsl", "side by side left first", 0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_LR}, 0, 0, FLAGS, "out" },
187  { "sbsr", "side by side right first", 0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_RL}, 0, 0, FLAGS, "out" },
188  {NULL},
189 };
190 
191 AVFILTER_DEFINE_CLASS(stereo3d);
192 
193 static const enum AVPixelFormat anaglyph_pix_fmts[] = { AV_PIX_FMT_RGB24, AV_PIX_FMT_NONE };
194 static const enum AVPixelFormat other_pix_fmts[] = {
195  AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
196  AV_PIX_FMT_RGB48BE, AV_PIX_FMT_BGR48BE,
197  AV_PIX_FMT_RGB48LE, AV_PIX_FMT_BGR48LE,
198  AV_PIX_FMT_RGBA64BE, AV_PIX_FMT_BGRA64BE,
199  AV_PIX_FMT_RGBA64LE, AV_PIX_FMT_BGRA64LE,
200  AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
201  AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
202  AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0,
203  AV_PIX_FMT_0RGB, AV_PIX_FMT_0BGR,
204  AV_PIX_FMT_GBRP,
205  AV_PIX_FMT_GBRP9BE, AV_PIX_FMT_GBRP9LE,
206  AV_PIX_FMT_GBRP10BE, AV_PIX_FMT_GBRP10LE,
207  AV_PIX_FMT_GBRP12BE, AV_PIX_FMT_GBRP12LE,
208  AV_PIX_FMT_GBRP14BE, AV_PIX_FMT_GBRP14LE,
209  AV_PIX_FMT_GBRP16BE, AV_PIX_FMT_GBRP16LE,
210  AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P,
211  AV_PIX_FMT_YUVJ444P,
212  AV_PIX_FMT_YUV444P9LE, AV_PIX_FMT_YUVA444P9LE,
213  AV_PIX_FMT_YUV444P9BE, AV_PIX_FMT_YUVA444P9BE,
214  AV_PIX_FMT_YUV444P10LE, AV_PIX_FMT_YUVA444P10LE,
215  AV_PIX_FMT_YUV444P10BE, AV_PIX_FMT_YUVA444P10BE,
216  AV_PIX_FMT_YUV444P12BE, AV_PIX_FMT_YUV444P12LE,
217  AV_PIX_FMT_YUV444P14BE, AV_PIX_FMT_YUV444P14LE,
218  AV_PIX_FMT_YUV444P16LE, AV_PIX_FMT_YUVA444P16LE,
219  AV_PIX_FMT_YUV444P16BE, AV_PIX_FMT_YUVA444P16BE,
220  AV_PIX_FMT_NONE
221 };
222 
223 static int query_formats(AVFilterContext *ctx)
224 {
225  Stereo3DContext *s = ctx->priv;
226  const enum AVPixelFormat *pix_fmts;
227 
228  switch (s->out.format) {
229  case ANAGLYPH_GM_COLOR:
230  case ANAGLYPH_GM_DUBOIS:
231  case ANAGLYPH_GM_GRAY:
232  case ANAGLYPH_GM_HALF:
233  case ANAGLYPH_RB_GRAY:
234  case ANAGLYPH_RC_COLOR:
235  case ANAGLYPH_RC_DUBOIS:
236  case ANAGLYPH_RC_GRAY:
237  case ANAGLYPH_RC_HALF:
238  case ANAGLYPH_RG_GRAY:
239  case ANAGLYPH_YB_COLOR:
240  case ANAGLYPH_YB_DUBOIS:
241  case ANAGLYPH_YB_GRAY:
242  case ANAGLYPH_YB_HALF:
243  pix_fmts = anaglyph_pix_fmts;
244  break;
245  default:
246  pix_fmts = other_pix_fmts;
247  }
248 
249  ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
250 
251  return 0;
252 }
253 
254 static int config_output(AVFilterLink *outlink)
255 {
256  AVFilterContext *ctx = outlink->src;
257  AVFilterLink *inlink = ctx->inputs[0];
258  Stereo3DContext *s = ctx->priv;
259  AVRational aspect = inlink->sample_aspect_ratio;
260  AVRational fps = inlink->frame_rate;
261  AVRational tb = inlink->time_base;
262  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format);
263  int ret;
264 
265  switch (s->in.format) {
266  case SIDE_BY_SIDE_2_LR:
267  case SIDE_BY_SIDE_LR:
268  case SIDE_BY_SIDE_2_RL:
269  case SIDE_BY_SIDE_RL:
270  if (inlink->w & 1) {
271  av_log(ctx, AV_LOG_ERROR, "width must be even\n");
272  return AVERROR_INVALIDDATA;
273  }
274  break;
275  case ABOVE_BELOW_2_LR:
276  case ABOVE_BELOW_LR:
277  case ABOVE_BELOW_2_RL:
278  case ABOVE_BELOW_RL:
279  if (s->out.format == INTERLEAVE_ROWS_LR ||
280  s->out.format == INTERLEAVE_ROWS_RL) {
281  if (inlink->h & 3) {
282  av_log(ctx, AV_LOG_ERROR, "height must be multiple of 4\n");
283  return AVERROR_INVALIDDATA;
284  }
285  }
286  if (inlink->h & 1) {
287  av_log(ctx, AV_LOG_ERROR, "height must be even\n");
288  return AVERROR_INVALIDDATA;
289  }
290  break;
291  }
292 
293  s->in.width =
294  s->width = inlink->w;
295  s->in.height =
296  s->height = inlink->h;
297  s->row_step = 1;
298  s->in.off_lstep =
299  s->in.off_rstep =
300  s->in.off_left =
301  s->in.off_right =
302  s->in.row_left =
303  s->in.row_right = 0;
304 
305  switch (s->in.format) {
306  case SIDE_BY_SIDE_2_LR:
307  aspect.num *= 2;
308  case SIDE_BY_SIDE_LR:
309  s->width = inlink->w / 2;
310  s->in.off_right = s->width;
311  break;
312  case SIDE_BY_SIDE_2_RL:
313  aspect.num *= 2;
314  case SIDE_BY_SIDE_RL:
315  s->width = inlink->w / 2;
316  s->in.off_left = s->width;
317  break;
318  case ABOVE_BELOW_2_LR:
319  aspect.den *= 2;
320  case ABOVE_BELOW_LR:
321  s->in.row_right =
322  s->height = inlink->h / 2;
323  break;
324  case ABOVE_BELOW_2_RL:
325  aspect.den *= 2;
326  case ABOVE_BELOW_RL:
327  s->in.row_left =
328  s->height = inlink->h / 2;
329  break;
330  case ALTERNATING_RL:
331  case ALTERNATING_LR:
332  outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
333  fps.den *= 2;
334  tb.num *= 2;
335  break;
336  default:
337  av_log(ctx, AV_LOG_ERROR, "input format %d is not supported\n", s->in.format);
338  return AVERROR(EINVAL);
339  }
340 
341  s->out.width = s->width;
342  s->out.height = s->height;
343  s->out.off_lstep =
344  s->out.off_rstep =
345  s->out.off_left =
346  s->out.off_right =
347  s->out.row_left =
348  s->out.row_right = 0;
349 
350  switch (s->out.format) {
351  case ANAGLYPH_RB_GRAY:
352  case ANAGLYPH_RG_GRAY:
353  case ANAGLYPH_RC_GRAY:
354  case ANAGLYPH_RC_HALF:
355  case ANAGLYPH_RC_COLOR:
356  case ANAGLYPH_RC_DUBOIS:
357  case ANAGLYPH_GM_GRAY:
358  case ANAGLYPH_GM_HALF:
359  case ANAGLYPH_GM_COLOR:
360  case ANAGLYPH_GM_DUBOIS:
361  case ANAGLYPH_YB_GRAY:
362  case ANAGLYPH_YB_HALF:
363  case ANAGLYPH_YB_COLOR:
364  case ANAGLYPH_YB_DUBOIS:
365  memcpy(s->ana_matrix, ana_coeff[s->out.format], sizeof(s->ana_matrix));
366  break;
367  case SIDE_BY_SIDE_2_LR:
368  aspect.den *= 2;
369  case SIDE_BY_SIDE_LR:
370  s->out.width = s->width * 2;
371  s->out.off_right = s->width;
372  break;
373  case SIDE_BY_SIDE_2_RL:
374  aspect.den *= 2;
375  case SIDE_BY_SIDE_RL:
376  s->out.width = s->width * 2;
377  s->out.off_left = s->width;
378  break;
379  case ABOVE_BELOW_2_LR:
380  aspect.num *= 2;
381  case ABOVE_BELOW_LR:
382  s->out.height = s->height * 2;
383  s->out.row_right = s->height;
384  break;
385  case ABOVE_BELOW_2_RL:
386  aspect.num *= 2;
387  case ABOVE_BELOW_RL:
388  s->out.height = s->height * 2;
389  s->out.row_left = s->height;
390  break;
391  case INTERLEAVE_ROWS_LR:
392  s->row_step = 2;
393  s->height = s->height / 2;
394  s->out.off_rstep =
395  s->in.off_rstep = 1;
396  break;
397  case INTERLEAVE_ROWS_RL:
398  s->row_step = 2;
399  s->height = s->height / 2;
400  s->out.off_lstep =
401  s->in.off_lstep = 1;
402  break;
403  case MONO_R:
404  s->in.off_left = s->in.off_right;
405  s->in.row_left = s->in.row_right;
406  case MONO_L:
407  break;
408  case ALTERNATING_RL:
409  case ALTERNATING_LR:
410  fps.num *= 2;
411  tb.den *= 2;
412  break;
413  default:
414  av_log(ctx, AV_LOG_ERROR, "output format %d is not supported\n", s->out.format);
415  return AVERROR(EINVAL);
416  }
417 
418  outlink->w = s->out.width;
419  outlink->h = s->out.height;
420  outlink->frame_rate = fps;
421  outlink->time_base = tb;
422  outlink->sample_aspect_ratio = aspect;
423 
424  if ((ret = av_image_fill_linesizes(s->linesize, outlink->format, s->width)) < 0)
425  return ret;
426  s->nb_planes = av_pix_fmt_count_planes(outlink->format);
427  av_image_fill_max_pixsteps(s->pixstep, NULL, desc);
428  s->ts_unit = av_q2d(av_inv_q(av_mul_q(outlink->frame_rate, outlink->time_base)));
429 
430  return 0;
431 }
432 
433 static inline uint8_t ana_convert(const int *coeff, uint8_t *left, uint8_t *right)
434 {
435  int sum;
436 
437  sum = coeff[0] * left[0] + coeff[3] * right[0]; //red in
438  sum += coeff[1] * left[1] + coeff[4] * right[1]; //green in
439  sum += coeff[2] * left[2] + coeff[5] * right[2]; //blue in
440 
441  return av_clip_uint8(sum >> 16);
442 }
443 
444 static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
445 {
446  AVFilterContext *ctx = inlink->dst;
447  Stereo3DContext *s = ctx->priv;
448  AVFilterLink *outlink = ctx->outputs[0];
449  AVFrame *out, *oleft, *oright, *ileft, *iright;
450  int out_off_left[4], out_off_right[4];
451  int in_off_left[4], in_off_right[4];
452  int i;
453 
454  switch (s->in.format) {
455  case ALTERNATING_LR:
456  case ALTERNATING_RL:
457  if (!s->prev) {
458  s->prev = inpicref;
459  return 0;
460  }
461  ileft = s->prev;
462  iright = inpicref;
463  if (s->in.format == ALTERNATING_RL)
464  FFSWAP(AVFrame *, ileft, iright);
465  break;
466  default:
467  ileft = iright = inpicref;
468  };
469 
470  out = oleft = oright = ff_get_video_buffer(outlink, outlink->w, outlink->h);
471  if (!out) {
472  av_frame_free(&s->prev);
473  av_frame_free(&inpicref);
474  return AVERROR(ENOMEM);
475  }
476  av_frame_copy_props(out, inpicref);
477 
478  if (s->out.format == ALTERNATING_LR ||
479  s->out.format == ALTERNATING_RL) {
480  oright = ff_get_video_buffer(outlink, outlink->w, outlink->h);
481  if (!oright) {
482  av_frame_free(&oleft);
483  av_frame_free(&s->prev);
484  av_frame_free(&inpicref);
485  return AVERROR(ENOMEM);
486  }
487  av_frame_copy_props(oright, inpicref);
488  }
489 
490  for (i = 0; i < 4; i++) {
491  in_off_left[i] = (s->in.row_left + s->in.off_lstep) * ileft->linesize[i] + s->in.off_left * s->pixstep[i];
492  in_off_right[i] = (s->in.row_right + s->in.off_rstep) * iright->linesize[i] + s->in.off_right * s->pixstep[i];
493  out_off_left[i] = (s->out.row_left + s->out.off_lstep) * oleft->linesize[i] + s->out.off_left * s->pixstep[i];
494  out_off_right[i] = (s->out.row_right + s->out.off_rstep) * oright->linesize[i] + s->out.off_right * s->pixstep[i];
495  }
496 
497  switch (s->out.format) {
498  case ALTERNATING_LR:
499  case ALTERNATING_RL:
500  case SIDE_BY_SIDE_LR:
501  case SIDE_BY_SIDE_RL:
502  case SIDE_BY_SIDE_2_LR:
503  case SIDE_BY_SIDE_2_RL:
504  case ABOVE_BELOW_LR:
505  case ABOVE_BELOW_RL:
506  case ABOVE_BELOW_2_LR:
507  case ABOVE_BELOW_2_RL:
508  case INTERLEAVE_ROWS_LR:
509  case INTERLEAVE_ROWS_RL:
510  for (i = 0; i < s->nb_planes; i++) {
511  av_image_copy_plane(oleft->data[i] + out_off_left[i],
512  oleft->linesize[i] * s->row_step,
513  ileft->data[i] + in_off_left[i],
514  ileft->linesize[i] * s->row_step,
515  s->linesize[i], s->height);
516  av_image_copy_plane(oright->data[i] + out_off_right[i],
517  oright->linesize[i] * s->row_step,
518  iright->data[i] + in_off_right[i],
519  iright->linesize[i] * s->row_step,
520  s->linesize[i], s->height);
521  }
522  break;
523  case MONO_L:
524  iright = ileft;
525  case MONO_R:
526  for (i = 0; i < s->nb_planes; i++) {
527  av_image_copy_plane(out->data[i], out->linesize[i],
528  iright->data[i] + in_off_left[i],
529  iright->linesize[i],
530  s->linesize[i], s->height);
531  }
532  break;
533  case ANAGLYPH_RB_GRAY:
534  case ANAGLYPH_RG_GRAY:
535  case ANAGLYPH_RC_GRAY:
536  case ANAGLYPH_RC_HALF:
537  case ANAGLYPH_RC_COLOR:
538  case ANAGLYPH_RC_DUBOIS:
539  case ANAGLYPH_GM_GRAY:
540  case ANAGLYPH_GM_HALF:
541  case ANAGLYPH_GM_COLOR:
542  case ANAGLYPH_GM_DUBOIS:
543  case ANAGLYPH_YB_GRAY:
544  case ANAGLYPH_YB_HALF:
545  case ANAGLYPH_YB_COLOR:
546  case ANAGLYPH_YB_DUBOIS: {
547  int i, x, y, il, ir, o;
548  uint8_t *lsrc = ileft->data[0];
549  uint8_t *rsrc = iright->data[0];
550  uint8_t *dst = out->data[0];
551  int out_width = s->out.width;
552  int *ana_matrix[3];
553 
554  for (i = 0; i < 3; i++)
555  ana_matrix[i] = s->ana_matrix[i];
556 
557  for (y = 0; y < s->out.height; y++) {
558  o = out->linesize[0] * y;
559  il = in_off_left[0] + y * ileft->linesize[0];
560  ir = in_off_right[0] + y * iright->linesize[0];
561  for (x = 0; x < out_width; x++, il += 3, ir += 3, o+= 3) {
562  dst[o ] = ana_convert(ana_matrix[0], lsrc + il, rsrc + ir);
563  dst[o + 1] = ana_convert(ana_matrix[1], lsrc + il, rsrc + ir);
564  dst[o + 2] = ana_convert(ana_matrix[2], lsrc + il, rsrc + ir);
565  }
566  }
567  break;
568  }
569  default:
570  av_assert0(0);
571  }
572 
573  av_frame_free(&inpicref);
574  av_frame_free(&s->prev);
575  if (oright != oleft) {
576  if (s->out.format == ALTERNATING_LR)
577  FFSWAP(AVFrame *, oleft, oright);
578  oright->pts = outlink->frame_count * s->ts_unit;
579  ff_filter_frame(outlink, oright);
580  out = oleft;
581  oleft->pts = outlink->frame_count * s->ts_unit;
582  } else if (s->in.format == ALTERNATING_LR ||
583  s->in.format == ALTERNATING_RL) {
584  out->pts = outlink->frame_count * s->ts_unit;
585  }
586  return ff_filter_frame(outlink, out);
587 }
588 
589 static av_cold void uninit(AVFilterContext *ctx)
590 {
591  Stereo3DContext *s = ctx->priv;
592 
593  av_frame_free(&s->prev);
594 }
595 
596 static const AVFilterPad stereo3d_inputs[] = {
597  {
598  .name = "default",
599  .type = AVMEDIA_TYPE_VIDEO,
600  .filter_frame = filter_frame,
601  },
602  { NULL }
603 };
604 
605 static const AVFilterPad stereo3d_outputs[] = {
606  {
607  .name = "default",
608  .type = AVMEDIA_TYPE_VIDEO,
609  .config_props = config_output,
610  },
611  { NULL }
612 };
613 
614 AVFilter avfilter_vf_stereo3d = {
615  .name = "stereo3d",
616  .description = NULL_IF_CONFIG_SMALL("Convert video stereoscopic 3D view."),
617  .priv_size = sizeof(Stereo3DContext),
618  .uninit = uninit,
619  .query_formats = query_formats,
620  .inputs = stereo3d_inputs,
621  .outputs = stereo3d_outputs,
622  .priv_class = &stereo3d_class,
623 };
Generated on Wed Jul 10 2013 23:48:11 for FFmpeg by   doxygen 1.8.2