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FFmpeg/libavfilter/vf_stereo3d.c

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  1. /*

  2.  * Copyright (c) 2010 Gordon Schmidt <gordon.schmidt <at> s2000.tu-chemnitz.de>

  3.  * Copyright (c) 2013-2015 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/intreadwrite.h"

  25. #include "libavutil/opt.h"

  26. #include "libavutil/parseutils.h"

  27. #include "libavutil/pixdesc.h"

  28. #include "avfilter.h"

  29. #include "drawutils.h"

  30. #include "formats.h"

  31. #include "internal.h"

  32. #include "video.h"

  33. 

  34. enum StereoCode {

  35.     ANAGLYPH_RC_GRAY,   // anaglyph red/cyan gray

  36.     ANAGLYPH_RC_HALF,   // anaglyph red/cyan half colored

  37.     ANAGLYPH_RC_COLOR,  // anaglyph red/cyan colored

  38.     ANAGLYPH_RC_DUBOIS, // anaglyph red/cyan dubois

  39.     ANAGLYPH_GM_GRAY,   // anaglyph green/magenta gray

  40.     ANAGLYPH_GM_HALF,   // anaglyph green/magenta half colored

  41.     ANAGLYPH_GM_COLOR,  // anaglyph green/magenta colored

  42.     ANAGLYPH_GM_DUBOIS, // anaglyph green/magenta dubois

  43.     ANAGLYPH_YB_GRAY,   // anaglyph yellow/blue gray

  44.     ANAGLYPH_YB_HALF,   // anaglyph yellow/blue half colored

  45.     ANAGLYPH_YB_COLOR,  // anaglyph yellow/blue colored

  46.     ANAGLYPH_YB_DUBOIS, // anaglyph yellow/blue dubois

  47.     ANAGLYPH_RB_GRAY,   // anaglyph red/blue gray

  48.     ANAGLYPH_RG_GRAY,   // anaglyph red/green gray

  49.     MONO_L,             // mono output for debugging (left eye only)

  50.     MONO_R,             // mono output for debugging (right eye only)

  51.     INTERLEAVE_ROWS_LR, // row-interleave (left eye has top row)

  52.     INTERLEAVE_ROWS_RL, // row-interleave (right eye has top row)

  53.     SIDE_BY_SIDE_LR,    // side by side parallel (left eye left, right eye right)

  54.     SIDE_BY_SIDE_RL,    // side by side crosseye (right eye left, left eye right)

  55.     SIDE_BY_SIDE_2_LR,  // side by side parallel with half width resolution

  56.     SIDE_BY_SIDE_2_RL,  // side by side crosseye with half width resolution

  57.     ABOVE_BELOW_LR,     // above-below (left eye above, right eye below)

  58.     ABOVE_BELOW_RL,     // above-below (right eye above, left eye below)

  59.     ABOVE_BELOW_2_LR,   // above-below with half height resolution

  60.     ABOVE_BELOW_2_RL,   // above-below with half height resolution

  61.     ALTERNATING_LR,     // alternating frames (left eye first, right eye second)

  62.     ALTERNATING_RL,     // alternating frames (right eye first, left eye second)

  63.     CHECKERBOARD_LR,    // checkerboard pattern (left eye first, right eye second)

  64.     CHECKERBOARD_RL,    // checkerboard pattern (right eye first, left eye second)

  65.     INTERLEAVE_COLS_LR, // column-interleave (left eye first, right eye second)

  66.     INTERLEAVE_COLS_RL, // column-interleave (right eye first, left eye second)

  67.     HDMI,               // HDMI frame pack (left eye first, right eye second)

  68.     STEREO_CODE_COUNT   // TODO: needs autodetection

  69. };

  70. 

  71. typedef struct StereoComponent {

  72.     int format;                 ///< StereoCode

  73.     int width, height;

  74.     int off_left, off_right;

  75.     int off_lstep, off_rstep;

  76.     int row_left, row_right;

  77.     int row_step;

  78. } StereoComponent;

  79. 

  80. static const int ana_coeff[][3][6] = {

  81.   [ANAGLYPH_RB_GRAY]   =

  82.     {{19595, 38470,  7471,     0,     0,     0},

  83.      {    0,     0,     0,     0,     0,     0},

  84.      {    0,     0,     0, 19595, 38470,  7471}},

  85.   [ANAGLYPH_RG_GRAY]   =

  86.     {{19595, 38470,  7471,     0,     0,     0},

  87.      {    0,     0,     0, 19595, 38470,  7471},

  88.      {    0,     0,     0,     0,     0,     0}},

  89.   [ANAGLYPH_RC_GRAY]   =

  90.     {{19595, 38470,  7471,     0,     0,     0},

  91.      {    0,     0,     0, 19595, 38470,  7471},

  92.      {    0,     0,     0, 19595, 38470,  7471}},

  93.   [ANAGLYPH_RC_HALF]   =

  94.     {{19595, 38470,  7471,     0,     0,     0},

  95.      {    0,     0,     0,     0, 65536,     0},

  96.      {    0,     0,     0,     0,     0, 65536}},

  97.   [ANAGLYPH_RC_COLOR]  =

  98.     {{65536,     0,     0,     0,     0,     0},

  99.      {    0,     0,     0,     0, 65536,     0},

  100.      {    0,     0,     0,     0,     0, 65536}},

  101.   [ANAGLYPH_RC_DUBOIS] =

  102.     {{29891, 32800, 11559, -2849, -5763,  -102},

  103.      {-2627, -2479, -1033, 24804, 48080, -1209},

  104.      { -997, -1350,  -358, -4729, -7403, 80373}},

  105.   [ANAGLYPH_GM_GRAY]   =

  106.     {{    0,     0,     0, 19595, 38470,  7471},

  107.      {19595, 38470,  7471,     0,     0,     0},

  108.      {    0,     0,     0, 19595, 38470,  7471}},

  109.   [ANAGLYPH_GM_HALF]   =

  110.     {{    0,     0,     0, 65536,     0,     0},

  111.      {19595, 38470,  7471,     0,     0,     0},

  112.      {    0,     0,     0,     0,     0, 65536}},

  113.   [ANAGLYPH_GM_COLOR]  =

  114.     {{    0,     0,     0, 65536,     0,     0},

  115.      {    0, 65536,     0,     0,     0,     0},

  116.      {    0,     0,     0,     0,     0, 65536}},

  117.   [ANAGLYPH_GM_DUBOIS]  =

  118.     {{-4063,-10354, -2556, 34669, 46203,  1573},

  119.      {18612, 43778,  9372, -1049,  -983, -4260},

  120.      { -983, -1769,  1376,   590,  4915, 61407}},

  121.   [ANAGLYPH_YB_GRAY]   =

  122.     {{    0,     0,     0, 19595, 38470,  7471},

  123.      {    0,     0,     0, 19595, 38470,  7471},

  124.      {19595, 38470,  7471,     0,     0,     0}},

  125.   [ANAGLYPH_YB_HALF]   =

  126.     {{    0,     0,     0, 65536,     0,     0},

  127.      {    0,     0,     0,     0, 65536,     0},

  128.      {19595, 38470,  7471,     0,     0,     0}},

  129.   [ANAGLYPH_YB_COLOR]  =

  130.     {{    0,     0,     0, 65536,     0,     0},

  131.      {    0,     0,     0,     0, 65536,     0},

  132.      {    0,     0, 65536,     0,     0,     0}},

  133.   [ANAGLYPH_YB_DUBOIS] =

  134.     {{65535,-12650,18451,   -987, -7590, -1049},

  135.      {-1604, 56032, 4196,    370,  3826, -1049},

  136.      {-2345,-10676, 1358,   5801, 11416, 56217}},

  137. };

  138. 

  139. typedef struct Stereo3DContext {

  140.     const AVClass *class;

  141.     StereoComponent in, out;

  142.     int width, height;

  143.     const int *ana_matrix[3];

  144.     int nb_planes;

  145.     int linesize[4];

  146.     int pheight[4];

  147.     int hsub, vsub;

  148.     int pixstep[4];

  149.     AVFrame *prev;

  150.     double ts_unit;

  151.     int blanks;

  152.     int in_off_left[4], in_off_right[4];

  153. } Stereo3DContext;

  154. 

  155. #define OFFSET(x) offsetof(Stereo3DContext, x)

  156. #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

  157. 

  158. static const AVOption stereo3d_options[] = {

  159.     { "in",    "set input format",  OFFSET(in.format),   AV_OPT_TYPE_INT,   {.i64=SIDE_BY_SIDE_LR}, INTERLEAVE_ROWS_LR, STEREO_CODE_COUNT-1, FLAGS, "in"},

  160.     { "ab2l",  "above below half height left first",  0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_2_LR},   0, 0, FLAGS, "in" },

  161.     { "ab2r",  "above below half height right first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_2_RL},   0, 0, FLAGS, "in" },

  162.     { "abl",   "above below left first",              0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_LR},     0, 0, FLAGS, "in" },

  163.     { "abr",   "above below right first",             0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_RL},     0, 0, FLAGS, "in" },

  164.     { "al",    "alternating frames left first",       0, AV_OPT_TYPE_CONST, {.i64=ALTERNATING_LR},     0, 0, FLAGS, "in" },

  165.     { "ar",    "alternating frames right first",      0, AV_OPT_TYPE_CONST, {.i64=ALTERNATING_RL},     0, 0, FLAGS, "in" },

  166.     { "sbs2l", "side by side half width left first",  0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_2_LR},  0, 0, FLAGS, "in" },

  167.     { "sbs2r", "side by side half width right first", 0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_2_RL},  0, 0, FLAGS, "in" },

  168.     { "sbsl",  "side by side left first",             0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_LR},    0, 0, FLAGS, "in" },

  169.     { "sbsr",  "side by side right first",            0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_RL},    0, 0, FLAGS, "in" },

  170.     { "irl",   "interleave rows left first",          0, AV_OPT_TYPE_CONST, {.i64=INTERLEAVE_ROWS_LR}, 0, 0, FLAGS, "in" },

  171.     { "irr",   "interleave rows right first",         0, AV_OPT_TYPE_CONST, {.i64=INTERLEAVE_ROWS_RL}, 0, 0, FLAGS, "in" },

  172.     { "out",   "set output format", OFFSET(out.format),  AV_OPT_TYPE_INT,   {.i64=ANAGLYPH_RC_DUBOIS}, 0, STEREO_CODE_COUNT-1, FLAGS, "out"},

  173.     { "ab2l",  "above below half height left first",  0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_2_LR},   0, 0, FLAGS, "out" },

  174.     { "ab2r",  "above below half height right first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_2_RL},   0, 0, FLAGS, "out" },

  175.     { "abl",   "above below left first",              0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_LR},     0, 0, FLAGS, "out" },

  176.     { "abr",   "above below right first",             0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_RL},     0, 0, FLAGS, "out" },

  177.     { "agmc",  "anaglyph green magenta color",        0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_GM_COLOR},  0, 0, FLAGS, "out" },

  178.     { "agmd",  "anaglyph green magenta dubois",       0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_GM_DUBOIS}, 0, 0, FLAGS, "out" },

  179.     { "agmg",  "anaglyph green magenta gray",         0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_GM_GRAY},   0, 0, FLAGS, "out" },

  180.     { "agmh",  "anaglyph green magenta half color",   0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_GM_HALF},   0, 0, FLAGS, "out" },

  181.     { "al",    "alternating frames left first",       0, AV_OPT_TYPE_CONST, {.i64=ALTERNATING_LR},     0, 0, FLAGS, "out" },

  182.     { "ar",    "alternating frames right first",      0, AV_OPT_TYPE_CONST, {.i64=ALTERNATING_RL},     0, 0, FLAGS, "out" },

  183.     { "arbg",  "anaglyph red blue gray",              0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_RB_GRAY},   0, 0, FLAGS, "out" },

  184.     { "arcc",  "anaglyph red cyan color",             0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_RC_COLOR},  0, 0, FLAGS, "out" },

  185.     { "arcd",  "anaglyph red cyan dubois",            0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_RC_DUBOIS}, 0, 0, FLAGS, "out" },

  186.     { "arcg",  "anaglyph red cyan gray",              0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_RC_GRAY},   0, 0, FLAGS, "out" },

  187.     { "arch",  "anaglyph red cyan half color",        0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_RC_HALF},   0, 0, FLAGS, "out" },

  188.     { "argg",  "anaglyph red green gray",             0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_RG_GRAY},   0, 0, FLAGS, "out" },

  189.     { "aybc",  "anaglyph yellow blue color",          0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_YB_COLOR},  0, 0, FLAGS, "out" },

  190.     { "aybd",  "anaglyph yellow blue dubois",         0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_YB_DUBOIS}, 0, 0, FLAGS, "out" },

  191.     { "aybg",  "anaglyph yellow blue gray",           0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_YB_GRAY},   0, 0, FLAGS, "out" },

  192.     { "aybh",  "anaglyph yellow blue half color",     0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_YB_HALF},   0, 0, FLAGS, "out" },

  193.     { "irl",   "interleave rows left first",          0, AV_OPT_TYPE_CONST, {.i64=INTERLEAVE_ROWS_LR}, 0, 0, FLAGS, "out" },

  194.     { "irr",   "interleave rows right first",         0, AV_OPT_TYPE_CONST, {.i64=INTERLEAVE_ROWS_RL}, 0, 0, FLAGS, "out" },

  195.     { "ml",    "mono left",                           0, AV_OPT_TYPE_CONST, {.i64=MONO_L},             0, 0, FLAGS, "out" },

  196.     { "mr",    "mono right",                          0, AV_OPT_TYPE_CONST, {.i64=MONO_R},             0, 0, FLAGS, "out" },

  197.     { "sbs2l", "side by side half width left first",  0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_2_LR},  0, 0, FLAGS, "out" },

  198.     { "sbs2r", "side by side half width right first", 0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_2_RL},  0, 0, FLAGS, "out" },

  199.     { "sbsl",  "side by side left first",             0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_LR},    0, 0, FLAGS, "out" },

  200.     { "sbsr",  "side by side right first",            0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_RL},    0, 0, FLAGS, "out" },

  201.     { "chl",   "checkerboard left first",             0, AV_OPT_TYPE_CONST, {.i64=CHECKERBOARD_LR},    0, 0, FLAGS, "out" },

  202.     { "chr",   "checkerboard right first",            0, AV_OPT_TYPE_CONST, {.i64=CHECKERBOARD_RL},    0, 0, FLAGS, "out" },

  203.     { "icl",   "interleave columns left first",       0, AV_OPT_TYPE_CONST, {.i64=INTERLEAVE_COLS_LR}, 0, 0, FLAGS, "out" },

  204.     { "icr",   "interleave columns right first",      0, AV_OPT_TYPE_CONST, {.i64=INTERLEAVE_COLS_RL}, 0, 0, FLAGS, "out" },

  205.     { "hdmi",  "HDMI frame pack",                     0, AV_OPT_TYPE_CONST, {.i64=HDMI},               0, 0, FLAGS, "out" },

  206.     { NULL }

  207. };

  208. 

  209. AVFILTER_DEFINE_CLASS(stereo3d);

  210. 

  211. static const enum AVPixelFormat anaglyph_pix_fmts[] = {

  212.     AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,

  213.     AV_PIX_FMT_NONE

  214. };

  215. 

  216. static const enum AVPixelFormat other_pix_fmts[] = {

  217.     AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,

  218.     AV_PIX_FMT_RGB48BE, AV_PIX_FMT_BGR48BE,

  219.     AV_PIX_FMT_RGB48LE, AV_PIX_FMT_BGR48LE,

  220.     AV_PIX_FMT_RGBA64BE, AV_PIX_FMT_BGRA64BE,

  221.     AV_PIX_FMT_RGBA64LE, AV_PIX_FMT_BGRA64LE,

  222.     AV_PIX_FMT_RGBA,  AV_PIX_FMT_BGRA,

  223.     AV_PIX_FMT_ARGB,  AV_PIX_FMT_ABGR,

  224.     AV_PIX_FMT_RGB0,  AV_PIX_FMT_BGR0,

  225.     AV_PIX_FMT_0RGB,  AV_PIX_FMT_0BGR,

  226.     AV_PIX_FMT_GBRP,

  227.     AV_PIX_FMT_GBRP9BE,  AV_PIX_FMT_GBRP9LE,

  228.     AV_PIX_FMT_GBRP10BE, AV_PIX_FMT_GBRP10LE,

  229.     AV_PIX_FMT_GBRP12BE, AV_PIX_FMT_GBRP12LE,

  230.     AV_PIX_FMT_GBRP14BE, AV_PIX_FMT_GBRP14LE,

  231.     AV_PIX_FMT_GBRP16BE, AV_PIX_FMT_GBRP16LE,

  232.     AV_PIX_FMT_YUV410P,

  233.     AV_PIX_FMT_YUV411P,

  234.     AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVA420P,

  235.     AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA422P,

  236.     AV_PIX_FMT_YUV440P,

  237.     AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P,

  238.     AV_PIX_FMT_YUVJ411P,

  239.     AV_PIX_FMT_YUVJ420P,

  240.     AV_PIX_FMT_YUVJ422P,

  241.     AV_PIX_FMT_YUVJ440P,

  242.     AV_PIX_FMT_YUVJ444P,

  243.     AV_PIX_FMT_YUV420P9LE,  AV_PIX_FMT_YUVA420P9LE,

  244.     AV_PIX_FMT_YUV420P9BE,  AV_PIX_FMT_YUVA420P9BE,

  245.     AV_PIX_FMT_YUV422P9LE,  AV_PIX_FMT_YUVA422P9LE,

  246.     AV_PIX_FMT_YUV422P9BE,  AV_PIX_FMT_YUVA422P9BE,

  247.     AV_PIX_FMT_YUV444P9LE,  AV_PIX_FMT_YUVA444P9LE,

  248.     AV_PIX_FMT_YUV444P9BE,  AV_PIX_FMT_YUVA444P9BE,

  249.     AV_PIX_FMT_YUV420P10LE, AV_PIX_FMT_YUVA420P10LE,

  250.     AV_PIX_FMT_YUV420P10BE, AV_PIX_FMT_YUVA420P10BE,

  251.     AV_PIX_FMT_YUV422P10LE, AV_PIX_FMT_YUVA422P10LE,

  252.     AV_PIX_FMT_YUV422P10BE, AV_PIX_FMT_YUVA422P10BE,

  253.     AV_PIX_FMT_YUV444P10LE, AV_PIX_FMT_YUVA444P10LE,

  254.     AV_PIX_FMT_YUV444P10BE, AV_PIX_FMT_YUVA444P10BE,

  255.     AV_PIX_FMT_YUV420P12BE,  AV_PIX_FMT_YUV420P12LE,

  256.     AV_PIX_FMT_YUV422P12BE,  AV_PIX_FMT_YUV422P12LE,

  257.     AV_PIX_FMT_YUV444P12BE,  AV_PIX_FMT_YUV444P12LE,

  258.     AV_PIX_FMT_YUV420P14BE,  AV_PIX_FMT_YUV420P14LE,

  259.     AV_PIX_FMT_YUV422P14BE,  AV_PIX_FMT_YUV422P14LE,

  260.     AV_PIX_FMT_YUV444P14BE,  AV_PIX_FMT_YUV444P14LE,

  261.     AV_PIX_FMT_YUV420P16LE, AV_PIX_FMT_YUVA420P16LE,

  262.     AV_PIX_FMT_YUV420P16BE, AV_PIX_FMT_YUVA420P16BE,

  263.     AV_PIX_FMT_YUV422P16LE, AV_PIX_FMT_YUVA422P16LE,

  264.     AV_PIX_FMT_YUV422P16BE, AV_PIX_FMT_YUVA422P16BE,

  265.     AV_PIX_FMT_YUV444P16LE, AV_PIX_FMT_YUVA444P16LE,

  266.     AV_PIX_FMT_YUV444P16BE, AV_PIX_FMT_YUVA444P16BE,

  267.     AV_PIX_FMT_NONE

  268. };

  269. 

  270. static int query_formats(AVFilterContext *ctx)

  271. {

  272.     Stereo3DContext *s = ctx->priv;

  273.     const enum AVPixelFormat *pix_fmts;

  274.     AVFilterFormats *fmts_list;

  275. 

  276.     switch (s->out.format) {

  277.     case ANAGLYPH_GM_COLOR:

  278.     case ANAGLYPH_GM_DUBOIS:

  279.     case ANAGLYPH_GM_GRAY:

  280.     case ANAGLYPH_GM_HALF:

  281.     case ANAGLYPH_RB_GRAY:

  282.     case ANAGLYPH_RC_COLOR:

  283.     case ANAGLYPH_RC_DUBOIS:

  284.     case ANAGLYPH_RC_GRAY:

  285.     case ANAGLYPH_RC_HALF:

  286.     case ANAGLYPH_RG_GRAY:

  287.     case ANAGLYPH_YB_COLOR:

  288.     case ANAGLYPH_YB_DUBOIS:

  289.     case ANAGLYPH_YB_GRAY:

  290.     case ANAGLYPH_YB_HALF:

  291.         pix_fmts = anaglyph_pix_fmts;

  292.         break;

  293.     default:

  294.         pix_fmts = other_pix_fmts;

  295.     }

  296. 

  297.     fmts_list = ff_make_format_list(pix_fmts);

  298.     if (!fmts_list)

  299.         return AVERROR(ENOMEM);

  300.     return ff_set_common_formats(ctx, fmts_list);

  301. }

  302. 

  303. static int config_output(AVFilterLink *outlink)

  304. {

  305.     AVFilterContext *ctx = outlink->src;

  306.     AVFilterLink *inlink = ctx->inputs[0];

  307.     Stereo3DContext *s = ctx->priv;

  308.     AVRational aspect = inlink->sample_aspect_ratio;

  309.     AVRational fps = inlink->frame_rate;

  310.     AVRational tb = inlink->time_base;

  311.     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format);

  312.     int ret;

  313. 

  314.     switch (s->in.format) {

  315.     case SIDE_BY_SIDE_2_LR:

  316.     case SIDE_BY_SIDE_LR:

  317.     case SIDE_BY_SIDE_2_RL:

  318.     case SIDE_BY_SIDE_RL:

  319.         if (inlink->w & 1) {

  320.             av_log(ctx, AV_LOG_ERROR, "width must be even\n");

  321.             return AVERROR_INVALIDDATA;

  322.         }

  323.         break;

  324.     case INTERLEAVE_ROWS_LR:

  325.     case INTERLEAVE_ROWS_RL:

  326.     case ABOVE_BELOW_2_LR:

  327.     case ABOVE_BELOW_LR:

  328.     case ABOVE_BELOW_2_RL:

  329.     case ABOVE_BELOW_RL:

  330.         if (inlink->h & 1) {

  331.             av_log(ctx, AV_LOG_ERROR, "height must be even\n");

  332.             return AVERROR_INVALIDDATA;

  333.         }

  334.         break;

  335.     }

  336. 

  337.     s->in.width     =

  338.     s->width        = inlink->w;

  339.     s->in.height    =

  340.     s->height       = inlink->h;

  341.     s->in.off_lstep =

  342.     s->in.off_rstep =

  343.     s->in.off_left  =

  344.     s->in.off_right =

  345.     s->in.row_left  =

  346.     s->in.row_right = 0;

  347.     s->in.row_step  = 1;

  348. 

  349.     switch (s->in.format) {

  350.     case SIDE_BY_SIDE_2_LR:

  351.         aspect.num     *= 2;

  352.     case SIDE_BY_SIDE_LR:

  353.         s->width        = inlink->w / 2;

  354.         s->in.off_right = s->width;

  355.         break;

  356.     case SIDE_BY_SIDE_2_RL:

  357.         aspect.num     *= 2;

  358.     case SIDE_BY_SIDE_RL:

  359.         s->width        = inlink->w / 2;

  360.         s->in.off_left  = s->width;

  361.         break;

  362.     case ABOVE_BELOW_2_LR:

  363.         aspect.den     *= 2;

  364.     case ABOVE_BELOW_LR:

  365.         s->in.row_right =

  366.         s->height       = inlink->h / 2;

  367.         break;

  368.     case ABOVE_BELOW_2_RL:

  369.         aspect.den     *= 2;

  370.     case ABOVE_BELOW_RL:

  371.         s->in.row_left  =

  372.         s->height       = inlink->h / 2;

  373.         break;

  374.     case ALTERNATING_RL:

  375.     case ALTERNATING_LR:

  376.         fps.den        *= 2;

  377.         tb.num         *= 2;

  378.         break;

  379.     case INTERLEAVE_ROWS_LR:

  380.     case INTERLEAVE_ROWS_RL:

  381.         s->in.row_step  = 2;

  382.         if (s->in.format == INTERLEAVE_ROWS_RL)

  383.             s->in.off_lstep = 1;

  384.         else

  385.             s->in.off_rstep = 1;

  386.         if (s->out.format != CHECKERBOARD_LR &&

  387.             s->out.format != CHECKERBOARD_RL)

  388.             s->height   = inlink->h / 2;

  389.         break;

  390.     default:

  391.         av_log(ctx, AV_LOG_ERROR, "input format %d is not supported\n", s->in.format);

  392.         return AVERROR(EINVAL);

  393.     }

  394. 

  395.     s->out.width     = s->width;

  396.     s->out.height    = s->height;

  397.     s->out.off_lstep =

  398.     s->out.off_rstep =

  399.     s->out.off_left  =

  400.     s->out.off_right =

  401.     s->out.row_left  =

  402.     s->out.row_right = 0;

  403.     s->out.row_step  = 1;

  404. 

  405.     switch (s->out.format) {

  406.     case ANAGLYPH_RB_GRAY:

  407.     case ANAGLYPH_RG_GRAY:

  408.     case ANAGLYPH_RC_GRAY:

  409.     case ANAGLYPH_RC_HALF:

  410.     case ANAGLYPH_RC_COLOR:

  411.     case ANAGLYPH_RC_DUBOIS:

  412.     case ANAGLYPH_GM_GRAY:

  413.     case ANAGLYPH_GM_HALF:

  414.     case ANAGLYPH_GM_COLOR:

  415.     case ANAGLYPH_GM_DUBOIS:

  416.     case ANAGLYPH_YB_GRAY:

  417.     case ANAGLYPH_YB_HALF:

  418.     case ANAGLYPH_YB_COLOR:

  419.     case ANAGLYPH_YB_DUBOIS: {

  420.         uint8_t rgba_map[4];

  421. 

  422.         ff_fill_rgba_map(rgba_map, outlink->format);

  423.         s->ana_matrix[rgba_map[0]] = &ana_coeff[s->out.format][0][0];

  424.         s->ana_matrix[rgba_map[1]] = &ana_coeff[s->out.format][1][0];

  425.         s->ana_matrix[rgba_map[2]] = &ana_coeff[s->out.format][2][0];

  426.         break;

  427.     }

  428.     case SIDE_BY_SIDE_2_LR:

  429.         aspect.den      *= 2;

  430.     case SIDE_BY_SIDE_LR:

  431.         s->out.width     = s->width * 2;

  432.         s->out.off_right = s->width;

  433.         break;

  434.     case SIDE_BY_SIDE_2_RL:

  435.         aspect.den      *= 2;

  436.     case SIDE_BY_SIDE_RL:

  437.         s->out.width     = s->width * 2;

  438.         s->out.off_left  = s->width;

  439.         break;

  440.     case ABOVE_BELOW_2_LR:

  441.         aspect.num      *= 2;

  442.     case ABOVE_BELOW_LR:

  443.         s->out.height    = s->height * 2;

  444.         s->out.row_right = s->height;

  445.         break;

  446.     case HDMI:

  447.         if (s->height != 720 && s->height != 1080) {

  448.             av_log(ctx, AV_LOG_ERROR, "Only 720 and 1080 height supported\n");

  449.             return AVERROR(EINVAL);

  450.         }

  451. 

  452.         s->blanks = s->height / 24;

  453.         s->out.height    = s->height * 2 + s->blanks;

  454.         s->out.row_right = s->height + s->blanks;

  455.         break;

  456.     case ABOVE_BELOW_2_RL:

  457.         aspect.num      *= 2;

  458.     case ABOVE_BELOW_RL:

  459.         s->out.height    = s->height * 2;

  460.         s->out.row_left  = s->height;

  461.         break;

  462.     case INTERLEAVE_ROWS_LR:

  463.         s->in.row_step   = 1 + (s->in.format == INTERLEAVE_ROWS_RL);

  464.         s->out.row_step  = 2;

  465.         s->out.height    = s->height * 2;

  466.         s->out.off_rstep = 1;

  467.         s->in.off_rstep  = s->in.format != INTERLEAVE_ROWS_RL;

  468.         break;

  469.     case INTERLEAVE_ROWS_RL:

  470.         s->in.row_step   = 1 + (s->in.format == INTERLEAVE_ROWS_LR);

  471.         s->out.row_step  = 2;

  472.         s->out.height    = s->height * 2;

  473.         s->out.off_lstep = 1;

  474.         s->in.off_lstep  = s->in.format != INTERLEAVE_ROWS_LR;

  475.         break;

  476.     case MONO_R:

  477.         s->in.off_left   = s->in.off_right;

  478.         s->in.row_left   = s->in.row_right;

  479.         if (s->in.format == INTERLEAVE_ROWS_LR)

  480.             FFSWAP(int, s->in.off_lstep, s->in.off_rstep);

  481.         break;

  482.     case MONO_L:

  483.         if (s->in.format == INTERLEAVE_ROWS_RL)

  484.             FFSWAP(int, s->in.off_lstep, s->in.off_rstep);

  485.         break;

  486.     case ALTERNATING_RL:

  487.     case ALTERNATING_LR:

  488.         fps.num         *= 2;

  489.         tb.den          *= 2;

  490.         break;

  491.     case CHECKERBOARD_LR:

  492.     case CHECKERBOARD_RL:

  493.         s->out.width     = s->width * 2;

  494.         break;

  495.     case INTERLEAVE_COLS_LR:

  496.     case INTERLEAVE_COLS_RL:

  497.         s->out.width     = s->width * 2;

  498.         break;

  499.     default:

  500.         av_log(ctx, AV_LOG_ERROR, "output format %d is not supported\n", s->out.format);

  501.         return AVERROR(EINVAL);

  502.     }

  503. 

  504.     outlink->w = s->out.width;

  505.     outlink->h = s->out.height;

  506.     outlink->frame_rate = fps;

  507.     outlink->time_base = tb;

  508.     outlink->sample_aspect_ratio = aspect;

  509. 

  510.     if ((ret = av_image_fill_linesizes(s->linesize, outlink->format, s->width)) < 0)

  511.         return ret;

  512.     s->nb_planes = av_pix_fmt_count_planes(outlink->format);

  513.     av_image_fill_max_pixsteps(s->pixstep, NULL, desc);

  514.     s->ts_unit = av_q2d(av_inv_q(av_mul_q(outlink->frame_rate, outlink->time_base)));

  515.     s->pheight[1] = s->pheight[2] = FF_CEIL_RSHIFT(s->height, desc->log2_chroma_h);

  516.     s->pheight[0] = s->pheight[3] = s->height;

  517.     s->hsub = desc->log2_chroma_w;

  518.     s->vsub = desc->log2_chroma_h;

  519. 

  520.     return 0;

  521. }

  522. 

  523. static inline uint8_t ana_convert(const int *coeff, const uint8_t *left, const uint8_t *right)

  524. {

  525.     int sum;

  526. 

  527.     sum  = coeff[0] * left[0] + coeff[3] * right[0]; //red in

  528.     sum += coeff[1] * left[1] + coeff[4] * right[1]; //green in

  529.     sum += coeff[2] * left[2] + coeff[5] * right[2]; //blue in

  530. 

  531.     return av_clip_uint8(sum >> 16);

  532. }

  533. 

  534. static void anaglyph(uint8_t *dst, uint8_t *lsrc, uint8_t *rsrc,

  535.                      ptrdiff_t dst_linesize, ptrdiff_t l_linesize, ptrdiff_t r_linesize,

  536.                      int width, int height,

  537.                      const int *ana_matrix_r, const int *ana_matrix_g, const int *ana_matrix_b)

  538. {

  539.     int x, y, o;

  540. 

  541.     for (y = 0; y < height; y++) {

  542.         for (o = 0, x = 0; x < width; x++, o+= 3) {

  543.             dst[o    ] = ana_convert(ana_matrix_r, lsrc + o, rsrc + o);

  544.             dst[o + 1] = ana_convert(ana_matrix_g, lsrc + o, rsrc + o);

  545.             dst[o + 2] = ana_convert(ana_matrix_b, lsrc + o, rsrc + o);

  546.         }

  547. 

  548.         dst  += dst_linesize;

  549.         lsrc += l_linesize;

  550.         rsrc += r_linesize;

  551.     }

  552. }

  553. 

  554. typedef struct ThreadData {

  555.     AVFrame *ileft, *iright;

  556.     AVFrame *out;

  557. } ThreadData;

  558. 

  559. static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)

  560. {

  561.     Stereo3DContext *s = ctx->priv;

  562.     ThreadData *td = arg;

  563.     AVFrame *ileft = td->ileft;

  564.     AVFrame *iright = td->iright;

  565.     AVFrame *out = td->out;

  566.     int height = s->out.height;

  567.     int start = (height *  jobnr   ) / nb_jobs;

  568.     int end   = (height * (jobnr+1)) / nb_jobs;

  569.     const int **ana_matrix = s->ana_matrix;

  570. 

  571.     anaglyph(out->data[0] + out->linesize[0] * start,

  572.              ileft ->data[0] + s->in_off_left [0]  + ileft->linesize[0] * start * s->in.row_step,

  573.              iright->data[0] + s->in_off_right[0] + iright->linesize[0] * start * s->in.row_step,

  574.              out->linesize[0],

  575.              ileft->linesize[0] * s->in.row_step,

  576.              iright->linesize[0] * s->in.row_step,

  577.              s->out.width, end - start,

  578.              ana_matrix[0], ana_matrix[1], ana_matrix[2]);

  579. 

  580.     return 0;

  581. }

  582. 

  583. static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)

  584. {

  585.     AVFilterContext *ctx  = inlink->dst;

  586.     Stereo3DContext *s = ctx->priv;

  587.     AVFilterLink *outlink = ctx->outputs[0];

  588.     AVFrame *out, *oleft, *oright, *ileft, *iright;

  589.     int out_off_left[4], out_off_right[4];

  590.     int i;

  591. 

  592.     if (s->in.format == s->out.format)

  593.         return ff_filter_frame(outlink, inpicref);

  594. 

  595.     switch (s->in.format) {

  596.     case ALTERNATING_LR:

  597.     case ALTERNATING_RL:

  598.         if (!s->prev) {

  599.             s->prev = inpicref;

  600.             return 0;

  601.         }

  602.         ileft  = s->prev;

  603.         iright = inpicref;

  604.         if (s->in.format == ALTERNATING_RL)

  605.             FFSWAP(AVFrame *, ileft, iright);

  606.         break;

  607.     default:

  608.         ileft = iright = inpicref;

  609.     };

  610. 

  611.     out = oleft = oright = ff_get_video_buffer(outlink, outlink->w, outlink->h);

  612.     if (!out) {

  613.         av_frame_free(&s->prev);

  614.         av_frame_free(&inpicref);

  615.         return AVERROR(ENOMEM);

  616.     }

  617.     av_frame_copy_props(out, inpicref);

  618. 

  619.     if (s->out.format == ALTERNATING_LR ||

  620.         s->out.format == ALTERNATING_RL) {

  621.         oright = ff_get_video_buffer(outlink, outlink->w, outlink->h);

  622.         if (!oright) {

  623.             av_frame_free(&oleft);

  624.             av_frame_free(&s->prev);

  625.             av_frame_free(&inpicref);

  626.             return AVERROR(ENOMEM);

  627.         }

  628.         av_frame_copy_props(oright, inpicref);

  629.     }

  630. 

  631.     for (i = 0; i < 4; i++) {

  632.         int hsub = i == 1 || i == 2 ? s->hsub : 0;

  633.         int vsub = i == 1 || i == 2 ? s->vsub : 0;

  634.         s->in_off_left[i]   = (FF_CEIL_RSHIFT(s->in.row_left,   vsub) + s->in.off_lstep)  * ileft->linesize[i]  + FF_CEIL_RSHIFT(s->in.off_left   * s->pixstep[i], hsub);

  635.         s->in_off_right[i]  = (FF_CEIL_RSHIFT(s->in.row_right,  vsub) + s->in.off_rstep)  * iright->linesize[i] + FF_CEIL_RSHIFT(s->in.off_right  * s->pixstep[i], hsub);

  636.         out_off_left[i]  = (FF_CEIL_RSHIFT(s->out.row_left,  vsub) + s->out.off_lstep) * oleft->linesize[i]  + FF_CEIL_RSHIFT(s->out.off_left  * s->pixstep[i], hsub);

  637.         out_off_right[i] = (FF_CEIL_RSHIFT(s->out.row_right, vsub) + s->out.off_rstep) * oright->linesize[i] + FF_CEIL_RSHIFT(s->out.off_right * s->pixstep[i], hsub);

  638.     }

  639. 

  640.     switch (s->out.format) {

  641.     case HDMI:

  642.         for (i = 0; i < s->nb_planes; i++) {

  643.             int j, h = s->height >> ((i == 1 || i == 2) ? s->vsub : 0);

  644.             int b = (s->blanks) >> ((i == 1 || i == 2) ? s->vsub : 0);

  645. 

  646.             for (j = h; j < h + b; j++)

  647.                 memset(oleft->data[i] + j * s->linesize[i], 0, s->linesize[i]);

  648.         }

  649.     case ALTERNATING_LR:

  650.     case ALTERNATING_RL:

  651.     case SIDE_BY_SIDE_LR:

  652.     case SIDE_BY_SIDE_RL:

  653.     case SIDE_BY_SIDE_2_LR:

  654.     case SIDE_BY_SIDE_2_RL:

  655.     case ABOVE_BELOW_LR:

  656.     case ABOVE_BELOW_RL:

  657.     case ABOVE_BELOW_2_LR:

  658.     case ABOVE_BELOW_2_RL:

  659.     case INTERLEAVE_ROWS_LR:

  660.     case INTERLEAVE_ROWS_RL:

  661.         for (i = 0; i < s->nb_planes; i++) {

  662.             av_image_copy_plane(oleft->data[i] + out_off_left[i],

  663.                                 oleft->linesize[i] * s->out.row_step,

  664.                                 ileft->data[i] + s->in_off_left[i],

  665.                                 ileft->linesize[i] * s->in.row_step,

  666.                                 s->linesize[i], s->pheight[i]);

  667.             av_image_copy_plane(oright->data[i] + out_off_right[i],

  668.                                 oright->linesize[i] * s->out.row_step,

  669.                                 iright->data[i] + s->in_off_right[i],

  670.                                 iright->linesize[i] * s->in.row_step,

  671.                                 s->linesize[i], s->pheight[i]);

  672.         }

  673.         break;

  674.     case MONO_L:

  675.         iright = ileft;

  676.     case MONO_R:

  677.         for (i = 0; i < s->nb_planes; i++) {

  678.             av_image_copy_plane(out->data[i], out->linesize[i],

  679.                                 iright->data[i] + s->in_off_left[i],

  680.                                 iright->linesize[i] * s->in.row_step,

  681.                                 s->linesize[i], s->pheight[i]);

  682.         }

  683.         break;

  684.     case ANAGLYPH_RB_GRAY:

  685.     case ANAGLYPH_RG_GRAY:

  686.     case ANAGLYPH_RC_GRAY:

  687.     case ANAGLYPH_RC_HALF:

  688.     case ANAGLYPH_RC_COLOR:

  689.     case ANAGLYPH_RC_DUBOIS:

  690.     case ANAGLYPH_GM_GRAY:

  691.     case ANAGLYPH_GM_HALF:

  692.     case ANAGLYPH_GM_COLOR:

  693.     case ANAGLYPH_GM_DUBOIS:

  694.     case ANAGLYPH_YB_GRAY:

  695.     case ANAGLYPH_YB_HALF:

  696.     case ANAGLYPH_YB_COLOR:

  697.     case ANAGLYPH_YB_DUBOIS: {

  698.         ThreadData td;

  699. 

  700.         td.ileft = ileft; td.iright = iright; td.out = out;

  701.         ctx->internal->execute(ctx, filter_slice, &td, NULL,

  702.                                FFMIN(s->out.height, ctx->graph->nb_threads));

  703.         break;

  704.     }

  705.     case CHECKERBOARD_RL:

  706.     case CHECKERBOARD_LR:

  707.         for (i = 0; i < s->nb_planes; i++) {

  708.             int x, y;

  709. 

  710.             for (y = 0; y < s->pheight[i]; y++) {

  711.                 uint8_t *dst = out->data[i] + out->linesize[i] * y;

  712.                 uint8_t *left = ileft->data[i] + ileft->linesize[i] * y + s->in_off_left[i];

  713.                 uint8_t *right = iright->data[i] + iright->linesize[i] * y + s->in_off_right[i];

  714.                 int p, b;

  715. 

  716.                 if (s->out.format == CHECKERBOARD_RL)

  717.                     FFSWAP(uint8_t*, left, right);

  718.                 switch (s->pixstep[i]) {

  719.                 case 1:

  720.                     for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=2, p++, b++) {

  721.                         dst[x  ] = (b&1) == (y&1) ? left[p] : right[p];

  722.                         dst[x+1] = (b&1) != (y&1) ? left[p] : right[p];

  723.                     }

  724.                     break;

  725.                 case 2:

  726.                     for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=4, p+=2, b++) {

  727.                         AV_WN16(&dst[x  ], (b&1) == (y&1) ? AV_RN16(&left[p]) : AV_RN16(&right[p]));

  728.                         AV_WN16(&dst[x+2], (b&1) != (y&1) ? AV_RN16(&left[p]) : AV_RN16(&right[p]));

  729.                     }

  730.                     break;

  731.                 case 3:

  732.                     for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=6, p+=3, b++) {

  733.                         AV_WB24(&dst[x  ], (b&1) == (y&1) ? AV_RB24(&left[p]) : AV_RB24(&right[p]));

  734.                         AV_WB24(&dst[x+3], (b&1) != (y&1) ? AV_RB24(&left[p]) : AV_RB24(&right[p]));

  735.                     }

  736.                     break;

  737.                 case 4:

  738.                     for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=8, p+=4, b++) {

  739.                         AV_WN32(&dst[x  ], (b&1) == (y&1) ? AV_RN32(&left[p]) : AV_RN32(&right[p]));

  740.                         AV_WN32(&dst[x+4], (b&1) != (y&1) ? AV_RN32(&left[p]) : AV_RN32(&right[p]));

  741.                     }

  742.                     break;

  743.                 case 6:

  744.                     for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=12, p+=6, b++) {

  745.                         AV_WB48(&dst[x  ], (b&1) == (y&1) ? AV_RB48(&left[p]) : AV_RB48(&right[p]));

  746.                         AV_WB48(&dst[x+6], (b&1) != (y&1) ? AV_RB48(&left[p]) : AV_RB48(&right[p]));

  747.                     }

  748.                     break;

  749.                 case 8:

  750.                     for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=16, p+=8, b++) {

  751.                         AV_WN64(&dst[x  ], (b&1) == (y&1) ? AV_RN64(&left[p]) : AV_RN64(&right[p]));

  752.                         AV_WN64(&dst[x+8], (b&1) != (y&1) ? AV_RN64(&left[p]) : AV_RN64(&right[p]));

  753.                     }

  754.                     break;

  755.                 }

  756.             }

  757.         }

  758.         break;

  759.     case INTERLEAVE_COLS_LR:

  760.     case INTERLEAVE_COLS_RL:

  761.         for (i = 0; i < s->nb_planes; i++) {

  762.             int x, y;

  763. 

  764.             for (y = 0; y < s->pheight[i]; y++) {

  765.                 uint8_t *dst = out->data[i] + out->linesize[i] * y;

  766.                 uint8_t *left = ileft->data[i] + ileft->linesize[i] * y * s->in.row_step + s->in_off_left[i];

  767.                 uint8_t *right = iright->data[i] + iright->linesize[i] * y * s->in.row_step + s->in_off_right[i];

  768.                 int p, b;

  769. 

  770.                 if (s->out.format == INTERLEAVE_COLS_LR)

  771.                     FFSWAP(uint8_t*, left, right);

  772. 

  773.                 switch (s->pixstep[i]) {

  774.                 case 1:

  775.                     for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=2, p++, b++) {

  776.                         dst[x  ] =   b&1  ? left[p] : right[p];

  777.                         dst[x+1] = !(b&1) ? left[p] : right[p];

  778.                     }

  779.                     break;

  780.                 case 2:

  781.                     for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=4, p+=2, b++) {

  782.                         AV_WN16(&dst[x  ],   b&1  ? AV_RN16(&left[p]) : AV_RN16(&right[p]));

  783.                         AV_WN16(&dst[x+2], !(b&1) ? AV_RN16(&left[p]) : AV_RN16(&right[p]));

  784.                     }

  785.                     break;

  786.                 case 3:

  787.                     for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=6, p+=3, b++) {

  788.                         AV_WB24(&dst[x  ],   b&1  ? AV_RB24(&left[p]) : AV_RB24(&right[p]));

  789.                         AV_WB24(&dst[x+3], !(b&1) ? AV_RB24(&left[p]) : AV_RB24(&right[p]));

  790.                     }

  791.                     break;

  792.                 case 4:

  793.                     for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=8, p+=4, b++) {

  794.                         AV_WN32(&dst[x  ],   b&1  ? AV_RN32(&left[p]) : AV_RN32(&right[p]));

  795.                         AV_WN32(&dst[x+4], !(b&1) ? AV_RN32(&left[p]) : AV_RN32(&right[p]));

  796.                     }

  797.                     break;

  798.                 case 6:

  799.                     for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=12, p+=6, b++) {

  800.                         AV_WB48(&dst[x  ],   b&1  ? AV_RB48(&left[p]) : AV_RB48(&right[p]));

  801.                         AV_WB48(&dst[x+6], !(b&1) ? AV_RB48(&left[p]) : AV_RB48(&right[p]));

  802.                     }

  803.                     break;

  804.                 case 8:

  805.                     for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=16, p+=8, b++) {

  806.                         AV_WN64(&dst[x  ],   b&1 ?  AV_RN64(&left[p]) : AV_RN64(&right[p]));

  807.                         AV_WN64(&dst[x+8], !(b&1) ? AV_RN64(&left[p]) : AV_RN64(&right[p]));

  808.                     }

  809.                     break;

  810.                 }

  811.             }

  812.         }

  813.         break;

  814.     default:

  815.         av_assert0(0);

  816.     }

  817. 

  818.     av_frame_free(&inpicref);

  819.     av_frame_free(&s->prev);

  820.     if (oright != oleft) {

  821.         if (s->out.format == ALTERNATING_LR)

  822.             FFSWAP(AVFrame *, oleft, oright);

  823.         oright->pts = outlink->frame_count * s->ts_unit;

  824.         ff_filter_frame(outlink, oright);

  825.         out = oleft;

  826.         oleft->pts = outlink->frame_count * s->ts_unit;

  827.     } else if (s->in.format == ALTERNATING_LR ||

  828.                s->in.format == ALTERNATING_RL) {

  829.         out->pts = outlink->frame_count * s->ts_unit;

  830.     }

  831.     return ff_filter_frame(outlink, out);

  832. }

  833. 

  834. static av_cold void uninit(AVFilterContext *ctx)

  835. {

  836.     Stereo3DContext *s = ctx->priv;

  837. 

  838.     av_frame_free(&s->prev);

  839. }

  840. 

  841. static const AVFilterPad stereo3d_inputs[] = {

  842.     {

  843.         .name         = "default",

  844.         .type         = AVMEDIA_TYPE_VIDEO,

  845.         .filter_frame = filter_frame,

  846.     },

  847.     { NULL }

  848. };

  849. 

  850. static const AVFilterPad stereo3d_outputs[] = {

  851.     {

  852.         .name         = "default",

  853.         .type         = AVMEDIA_TYPE_VIDEO,

  854.         .config_props = config_output,

  855.     },

  856.     { NULL }

  857. };

  858. 

  859. AVFilter ff_vf_stereo3d = {

  860.     .name          = "stereo3d",

  861.     .description   = NULL_IF_CONFIG_SMALL("Convert video stereoscopic 3D view."),

  862.     .priv_size     = sizeof(Stereo3DContext),

  863.     .uninit        = uninit,

  864.     .query_formats = query_formats,

  865.     .inputs        = stereo3d_inputs,

  866.     .outputs       = stereo3d_outputs,

  867.     .priv_class    = &stereo3d_class,

  868.     .flags         = AVFILTER_FLAG_SLICE_THREADS,

  869. };