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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 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.     STEREO_CODE_COUNT   // TODO: needs autodetection

  60. };

  61. 

  62. typedef struct StereoComponent {

  63.     enum StereoCode format;

  64.     int width, height;

  65.     int off_left, off_right;

  66.     int row_left, row_right;

  67. } StereoComponent;

  68. 

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

  70.   [ANAGLYPH_RB_GRAY]   =

  71.     {{19595, 38470,  7471,     0,     0,     0},

  72.      {    0,     0,     0,     0,     0,     0},

  73.      {    0,     0,     0, 19595, 38470,  7471}},

  74.   [ANAGLYPH_RG_GRAY]   =

  75.     {{19595, 38470,  7471,     0,     0,     0},

  76.      {    0,     0,     0, 19595, 38470,  7471},

  77.      {    0,     0,     0,     0,     0,     0}},

  78.   [ANAGLYPH_RC_GRAY]   =

  79.     {{19595, 38470,  7471,     0,     0,     0},

  80.      {    0,     0,     0, 19595, 38470,  7471},

  81.      {    0,     0,     0, 19595, 38470,  7471}},

  82.   [ANAGLYPH_RC_HALF]   =

  83.     {{19595, 38470,  7471,     0,     0,     0},

  84.      {    0,     0,     0,     0, 65536,     0},

  85.      {    0,     0,     0,     0,     0, 65536}},

  86.   [ANAGLYPH_RC_COLOR]  =

  87.     {{65536,     0,     0,     0,     0,     0},

  88.      {    0,     0,     0,     0, 65536,     0},

  89.      {    0,     0,     0,     0,     0, 65536}},

  90.   [ANAGLYPH_RC_DUBOIS] =

  91.     {{29891, 32800, 11559, -2849, -5763,  -102},

  92.      {-2627, -2479, -1033, 24804, 48080, -1209},

  93.      { -997, -1350,  -358, -4729, -7403, 80373}},

  94.   [ANAGLYPH_GM_GRAY]   =

  95.     {{    0,     0,     0, 19595, 38470,  7471},

  96.      {19595, 38470,  7471,     0,     0,     0},

  97.      {    0,     0,     0, 19595, 38470,  7471}},

  98.   [ANAGLYPH_GM_HALF]   =

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

  100.      {19595, 38470,  7471,     0,     0,     0},

  101.      {    0,     0,     0,     0,     0, 65536}},

  102.   [ANAGLYPH_GM_COLOR]  =

  103.     {{    0,     0,     0, 65536,     0,     0},

  104.      {    0, 65536,     0,     0,     0,     0},

  105.      {    0,     0,     0,     0,     0, 65536}},

  106.   [ANAGLYPH_GM_DUBOIS]  =

  107.     {{-4063,-10354, -2556, 34669, 46203,  1573},

  108.      {18612, 43778,  9372, -1049,  -983, -4260},

  109.      { -983, -1769,  1376,   590,  4915, 61407}},

  110.   [ANAGLYPH_YB_GRAY]   =

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

  112.      {    0,     0,     0, 19595, 38470,  7471},

  113.      {19595, 38470,  7471,     0,     0,     0}},

  114.   [ANAGLYPH_YB_HALF]   =

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

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

  117.      {19595, 38470,  7471,     0,     0,     0}},

  118.   [ANAGLYPH_YB_COLOR]  =

  119.     {{    0,     0,     0, 65536,     0,     0},

  120.      {    0,     0,     0,     0, 65536,     0},

  121.      {    0,     0, 65536,     0,     0,     0}},

  122.   [ANAGLYPH_YB_DUBOIS] =

  123.     {{65535,-12650,18451,   -987, -7590, -1049},

  124.      {-1604, 56032, 4196,    370,  3826, -1049},

  125.      {-2345,-10676, 1358,   5801, 11416, 56217}},

  126. };

  127. 

  128. typedef struct Stereo3DContext {

  129.     const AVClass *class;

  130.     StereoComponent in, out;

  131.     int width, height;

  132.     int row_step;

  133.     int ana_matrix[3][6];

  134. } Stereo3DContext;

  135. 

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

  137. #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

  138. 

  139. static const AVOption stereo3d_options[] = {

  140.     { "in",    "set input format",  OFFSET(in.format),  AV_OPT_TYPE_INT, {.i64=SIDE_BY_SIDE_LR}, SIDE_BY_SIDE_LR, ABOVE_BELOW_2_RL, FLAGS, "in"},

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  176.     {NULL},

  177. };

  178. 

  179. AVFILTER_DEFINE_CLASS(stereo3d);

  180. 

  181. static int query_formats(AVFilterContext *ctx)

  182. {

  183.     static const enum AVPixelFormat pix_fmts[] = {

  184.         AV_PIX_FMT_RGB24, AV_PIX_FMT_NONE

  185.     };

  186. 

  187.     ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));

  188. 

  189.     return 0;

  190. }

  191. 

  192. static int config_output(AVFilterLink *outlink)

  193. {

  194.     AVFilterContext *ctx = outlink->src;

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

  196.     Stereo3DContext *s = ctx->priv;

  197.     AVRational aspect = inlink->sample_aspect_ratio;

  198. 

  199.     s->in.width     =

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

  201.     s->in.height    =

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

  203.     s->row_step     = 1;

  204.     s->in.off_left  =

  205.     s->in.off_right =

  206.     s->in.row_left  =

  207.     s->in.row_right = 0;

  208. 

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

  210.     case SIDE_BY_SIDE_2_LR:

  211.         aspect.num     *= 2;

  212.     case SIDE_BY_SIDE_LR:

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

  214.         s->in.off_right = s->width * 3;

  215.         break;

  216.     case SIDE_BY_SIDE_2_RL:

  217.         aspect.num     *= 2;

  218.     case SIDE_BY_SIDE_RL:

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

  220.         s->in.off_left  = s->width * 3;

  221.         break;

  222.     case ABOVE_BELOW_2_LR:

  223.         aspect.den     *= 2;

  224.     case ABOVE_BELOW_LR:

  225.         s->in.row_right =

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

  227.         break;

  228.     case ABOVE_BELOW_2_RL:

  229.         aspect.den     *= 2;

  230.     case ABOVE_BELOW_RL:

  231.         s->in.row_left  =

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

  233.         break;

  234.     default:

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

  236.         return AVERROR(EINVAL);

  237.     }

  238. 

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

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

  241.     s->out.off_left  =

  242.     s->out.off_right =

  243.     s->out.row_left  =

  244.     s->out.row_right = 0;

  245. 

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

  247.     case ANAGLYPH_RB_GRAY:

  248.     case ANAGLYPH_RG_GRAY:

  249.     case ANAGLYPH_RC_GRAY:

  250.     case ANAGLYPH_RC_HALF:

  251.     case ANAGLYPH_RC_COLOR:

  252.     case ANAGLYPH_RC_DUBOIS:

  253.     case ANAGLYPH_GM_GRAY:

  254.     case ANAGLYPH_GM_HALF:

  255.     case ANAGLYPH_GM_COLOR:

  256.     case ANAGLYPH_GM_DUBOIS:

  257.     case ANAGLYPH_YB_GRAY:

  258.     case ANAGLYPH_YB_HALF:

  259.     case ANAGLYPH_YB_COLOR:

  260.     case ANAGLYPH_YB_DUBOIS:

  261.         memcpy(s->ana_matrix, ana_coeff[s->out.format], sizeof(s->ana_matrix));

  262.         break;

  263.     case SIDE_BY_SIDE_2_LR:

  264.         aspect.num      /= 2;

  265.     case SIDE_BY_SIDE_LR:

  266.         s->out.width     =

  267.         s->out.off_right = s->width * 3;

  268.         break;

  269.     case SIDE_BY_SIDE_2_RL:

  270.         aspect.num      /= 2;

  271.     case SIDE_BY_SIDE_RL:

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

  273.         s->out.off_left  = s->width * 3;

  274.         break;

  275.     case ABOVE_BELOW_2_LR:

  276.         aspect.den      /= 2;

  277.     case ABOVE_BELOW_LR:

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

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

  280.         break;

  281.     case ABOVE_BELOW_2_RL:

  282.         aspect.den      /= 2;

  283.     case ABOVE_BELOW_RL:

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

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

  286.         break;

  287.     case INTERLEAVE_ROWS_LR:

  288.         s->row_step      = 2;

  289.         s->height        = s->height / 2;

  290.         s->out.off_right = s->width * 3;

  291.         s->in.off_right += s->in.width * 3;

  292.         break;

  293.     case INTERLEAVE_ROWS_RL:

  294.         s->row_step      = 2;

  295.         s->height        = s->height / 2;

  296.         s->out.off_left  = s->width * 3;

  297.         s->in.off_left  += s->in.width * 3;

  298.         break;

  299.     case MONO_R:

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

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

  302.     case MONO_L:

  303.         break;

  304.     default:

  305.         av_log(ctx, AV_LOG_ERROR, "output format is not supported\n");

  306.         return AVERROR(EINVAL);

  307.     }

  308. 

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

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

  311.     outlink->sample_aspect_ratio = aspect;

  312. 

  313.     return 0;

  314. }

  315. 

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

  317. {

  318.     int sum;

  319. 

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

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

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

  323. 

  324.     return av_clip_uint8(sum >> 16);

  325. }

  326. 

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

  328. {

  329.     AVFilterContext *ctx  = inlink->dst;

  330.     Stereo3DContext *s = ctx->priv;

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

  332.     AVFrame *out;

  333.     int out_off_left, out_off_right;

  334.     int in_off_left, in_off_right;

  335.     int ret;

  336. 

  337.     out = ff_get_video_buffer(outlink, outlink->w, outlink->h);

  338.     if (!out) {

  339.         av_frame_free(&inpicref);

  340.         return AVERROR(ENOMEM);

  341.     }

  342.     av_frame_copy_props(out, inpicref);

  343. 

  344.     in_off_left   = s->in.row_left  * inpicref->linesize[0] + s->in.off_left;

  345.     in_off_right  = s->in.row_right * inpicref->linesize[0] + s->in.off_right;

  346.     out_off_left  = s->out.row_left  * out->linesize[0] + s->out.off_left;

  347.     out_off_right = s->out.row_right * out->linesize[0] + s->out.off_right;

  348. 

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

  350.     case SIDE_BY_SIDE_LR:

  351.     case SIDE_BY_SIDE_RL:

  352.     case SIDE_BY_SIDE_2_LR:

  353.     case SIDE_BY_SIDE_2_RL:

  354.     case ABOVE_BELOW_LR:

  355.     case ABOVE_BELOW_RL:

  356.     case ABOVE_BELOW_2_LR:

  357.     case ABOVE_BELOW_2_RL:

  358.     case INTERLEAVE_ROWS_LR:

  359.     case INTERLEAVE_ROWS_RL:

  360.         av_image_copy_plane(out->data[0] + out_off_left,

  361.                             out->linesize[0] * s->row_step,

  362.                             inpicref->data[0] + in_off_left,

  363.                             inpicref->linesize[0] * s->row_step,

  364.                             3 * s->width, s->height);

  365.         av_image_copy_plane(out->data[0] + out_off_right,

  366.                             out->linesize[0] * s->row_step,

  367.                             inpicref->data[0] + in_off_right,

  368.                             inpicref->linesize[0] * s->row_step,

  369.                             3 * s->width, s->height);

  370.         break;

  371.     case MONO_L:

  372.     case MONO_R:

  373.         av_image_copy_plane(out->data[0], out->linesize[0],

  374.                             inpicref->data[0] + in_off_left,

  375.                             inpicref->linesize[0],

  376.                             3 * s->width, s->height);

  377.         break;

  378.     case ANAGLYPH_RB_GRAY:

  379.     case ANAGLYPH_RG_GRAY:

  380.     case ANAGLYPH_RC_GRAY:

  381.     case ANAGLYPH_RC_HALF:

  382.     case ANAGLYPH_RC_COLOR:

  383.     case ANAGLYPH_RC_DUBOIS:

  384.     case ANAGLYPH_GM_GRAY:

  385.     case ANAGLYPH_GM_HALF:

  386.     case ANAGLYPH_GM_COLOR:

  387.     case ANAGLYPH_GM_DUBOIS:

  388.     case ANAGLYPH_YB_GRAY:

  389.     case ANAGLYPH_YB_HALF:

  390.     case ANAGLYPH_YB_COLOR:

  391.     case ANAGLYPH_YB_DUBOIS: {

  392.         int i, x, y, il, ir, o;

  393.         uint8_t *src = inpicref->data[0];

  394.         uint8_t *dst = out->data[0];

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

  396.         int *ana_matrix[3];

  397. 

  398.         for (i = 0; i < 3; i++)

  399.             ana_matrix[i] = s->ana_matrix[i];

  400. 

  401.         for (y = 0; y < s->out.height; y++) {

  402.             o   = out->linesize[0] * y;

  403.             il  = in_off_left  + y * inpicref->linesize[0];

  404.             ir  = in_off_right + y * inpicref->linesize[0];

  405.             for (x = 0; x < out_width; x++, il += 3, ir += 3, o+= 3) {

  406.                 dst[o    ] = ana_convert(ana_matrix[0], src + il, src + ir);

  407.                 dst[o + 1] = ana_convert(ana_matrix[1], src + il, src + ir);

  408.                 dst[o + 2] = ana_convert(ana_matrix[2], src + il, src + ir);

  409.             }

  410.         }

  411.         break;

  412.     }

  413.     default:

  414.         av_assert0(0);

  415.     }

  416. 

  417.     ret = ff_filter_frame(outlink, out);

  418.     av_frame_free(&inpicref);

  419.     if (ret < 0)

  420.         return ret;

  421.     return 0;

  422. }

  423. 

  424. static const AVFilterPad stereo3d_inputs[] = {

  425.     {

  426.         .name             = "default",

  427.         .type             = AVMEDIA_TYPE_VIDEO,

  428.         .get_video_buffer = ff_null_get_video_buffer,

  429.         .filter_frame     = filter_frame,

  430.     },

  431.     { NULL }

  432. };

  433. 

  434. static const AVFilterPad stereo3d_outputs[] = {

  435.     {

  436.         .name         = "default",

  437.         .type         = AVMEDIA_TYPE_VIDEO,

  438.         .config_props = config_output,

  439.     },

  440.     { NULL }

  441. };

  442. 

  443. static const char *const shorthand[] = { "in", "out", NULL };

  444. 

  445. AVFilter avfilter_vf_stereo3d = {

  446.     .name          = "stereo3d",

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

  448.     .priv_size     = sizeof(Stereo3DContext),

  449.     .query_formats = query_formats,

  450.     .inputs        = stereo3d_inputs,

  451.     .outputs       = stereo3d_outputs,

  452.     .priv_class    = &stereo3d_class,

  453.     .shorthand     = shorthand,

  454. };