@@ -23,6 +23,7 @@ version <next>:

 - noise filter ported from libmpcodecs

 - Subtitles character encoding conversion

 - blend filter

+- stereo3d filter ported from libmpcodecs

 version 1.1:

@@ -39,6 +39,7 @@ Specifically, the GPL parts of FFmpeg are

     - vf_noise.c

     - vf_pp.c

     - vf_smartblur.c

+    - vf_stereo3d.c

     - vf_super2xsai.c

     - vf_tinterlace.c

     - vf_yadif.c

@@ -2081,6 +2081,7 @@ removelogo_filter_deps="avcodec avformat swscale"

 scale_filter_deps="swscale"

 smartblur_filter_deps="gpl swscale"

 showspectrum_filter_deps="avcodec rdft"

+stereo3d_filter_deps="gpl"

 subtitles_filter_deps="avformat avcodec libass"

 super2xsai_filter_deps="gpl"

 tinterlace_filter_deps="gpl"

@@ -4832,6 +4832,127 @@ a pixel should be blurred or not. A value of 0 will filter all the

 image, a value included in [0,30] will filter flat areas and a value

 included in [-30,0] will filter edges.

+@section stereo3d

+

+Convert between different stereoscopic image formats.

+

+This filter accepts the following named options, expressed as a

+sequence of @var{key}=@var{value} pairs, separated by ":".

+

+@table @option

+@item in

+Set stereoscopic image format of input.

+

+Available values for input image formats are:

+@table @samp

+@item sbsl

+side by side parallel (left eye left, right eye right)

+

+@item sbsr

+side by side crosseye (right eye left, left eye right)

+

+@item sbs2l

+side by side parallel with half width resolution

+(left eye left, right eye right)

+

+@item sbs2r

+side by side crosseye with half width resolution

+(right eye left, left eye right)

+

+@item abl

+above-below (left eye above, right eye below)

+

+@item abr

+above-below (right eye above, left eye below)

+

+@item ab2l

+above-below with half height resolution

+(left eye above, right eye below)

+

+@item ab2r

+above-below with half height resolution

+(right eye above, left eye below)

+

+Default value is @samp{sbsl}.

+@end table

+

+@item out

+Set stereoscopic image format of output.

+

+Available values for output image formats are all the input formats as well as:

+@table @samp

+@item arbg

+anaglyph red/blue gray

+(red filter on left eye, blue filter on right eye)

+

+@item argg

+anaglyph red/green gray

+(red filter on left eye, green filter on right eye)

+

+@item arcg

+anaglyph red/cyan gray

+(red filter on left eye, cyan filter on right eye)

+

+@item arch

+anaglyph red/cyan half colored

+(red filter on left eye, cyan filter on right eye)

+

+@item arcc

+anaglyph red/cyan color

+(red filter on left eye, cyan filter on right eye)

+

+@item arcd

+anaglyph red/cyan color optimized with the least squares projection of dubois

+(red filter on left eye, cyan filter on right eye)

+

+@item agmg

+anaglyph green/magenta gray

+(green filter on left eye, magenta filter on right eye)

+

+@item agmh

+anaglyph green/magenta half colored

+(green filter on left eye, magenta filter on right eye)

+

+@item agmc

+anaglyph green/magenta colored

+(green filter on left eye, magenta filter on right eye)

+

+@item agmd

+anaglyph green/magenta color optimized with the least squares projection of dubois

+(green filter on left eye, magenta filter on right eye)

+

+@item aybg

+anaglyph yellow/blue gray

+(yellow filter on left eye, blue filter on right eye)

+

+@item aybh

+anaglyph yellow/blue half colored

+(yellow filter on left eye, blue filter on right eye)

+

+@item aybc

+anaglyph yellow/blue colored

+(yellow filter on left eye, blue filter on right eye)

+

+@item aybd

+anaglyph yellow/blue color optimized with the least squares projection of dubois

+(yellow filter on left eye, blue filter on right eye)

+

+@item irl

+interleaved rows (left eye has top row, right eye starts on next row)

+

+@item irr

+interleaved rows (right eye has top row, left eye starts on next row)

+

+@item ml

+mono output (left eye only)

+

+@item mr

+mono output (right eye only)

+@end table

+

+Default value is @samp{arcd}.

+@end table

+

 @anchor{subtitles}

 @section subtitles

@@ -154,6 +154,7 @@ OBJS-$(CONFIG_SETTB_FILTER)                  += f_settb.o

 OBJS-$(CONFIG_SHOWINFO_FILTER)               += vf_showinfo.o

 OBJS-$(CONFIG_SMARTBLUR_FILTER)              += vf_smartblur.o

 OBJS-$(CONFIG_SPLIT_FILTER)                  += split.o

+OBJS-$(CONFIG_STEREO3D_FILTER)               += vf_stereo3d.o

 OBJS-$(CONFIG_SUBTITLES_FILTER)              += vf_subtitles.o

 OBJS-$(CONFIG_SUPER2XSAI_FILTER)             += vf_super2xsai.o

 OBJS-$(CONFIG_SWAPUV_FILTER)                 += vf_swapuv.o

@@ -148,6 +148,7 @@ void avfilter_register_all(void)

     REGISTER_FILTER(SHOWINFO,       showinfo,       vf);

     REGISTER_FILTER(SMARTBLUR,      smartblur,      vf);

     REGISTER_FILTER(SPLIT,          split,          vf);

+    REGISTER_FILTER(STEREO3D,       stereo3d,       vf);

     REGISTER_FILTER(SUBTITLES,      subtitles,      vf);

     REGISTER_FILTER(SUPER2XSAI,     super2xsai,     vf);

     REGISTER_FILTER(SWAPUV,         swapuv,         vf);

@@ -29,7 +29,7 @@

 #include "libavutil/avutil.h"

 #define LIBAVFILTER_VERSION_MAJOR  3

-#define LIBAVFILTER_VERSION_MINOR  41

+#define LIBAVFILTER_VERSION_MINOR  42

 #define LIBAVFILTER_VERSION_MICRO 100

 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \

new file mode 100644

@@ -0,0 +1,478 @@

+/*

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

+ * Copyright (c) 2013 Paul B Mahol

+ *

+ * This file is part of FFmpeg.

+ *

+ * FFmpeg is free software; you can redistribute it and/or

+ * modify it under the terms of the GNU General Public

+ * License as published by the Free Software Foundation; either

+ * version 2 of the License, or (at your option) any later version.

+ *

+ * FFmpeg is distributed in the hope that it will be useful,

+ * but WITHOUT ANY WARRANTY; without even the implied warranty of

+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

+ * GNU General Public License for more details.

+ *

+ * You should have received a copy of the GNU General Public License along

+ * with FFmpeg; if not, write to the Free Software

+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

+ */

+

+#include "libavutil/avassert.h"

+#include "libavutil/imgutils.h"

+#include "libavutil/opt.h"

+#include "libavutil/parseutils.h"

+#include "libavutil/pixdesc.h"

+#include "avfilter.h"

+#include "formats.h"

+#include "internal.h"

+#include "video.h"

+

+enum StereoCode {

+    ANAGLYPH_RC_GRAY,   // anaglyph red/cyan gray

+    ANAGLYPH_RC_HALF,   // anaglyph red/cyan half colored

+    ANAGLYPH_RC_COLOR,  // anaglyph red/cyan colored

+    ANAGLYPH_RC_DUBOIS, // anaglyph red/cyan dubois

+    ANAGLYPH_GM_GRAY,   // anaglyph green/magenta gray

+    ANAGLYPH_GM_HALF,   // anaglyph green/magenta half colored

+    ANAGLYPH_GM_COLOR,  // anaglyph green/magenta colored

+    ANAGLYPH_GM_DUBOIS, // anaglyph green/magenta dubois

+    ANAGLYPH_YB_GRAY,   // anaglyph yellow/blue gray

+    ANAGLYPH_YB_HALF,   // anaglyph yellow/blue half colored

+    ANAGLYPH_YB_COLOR,  // anaglyph yellow/blue colored

+    ANAGLYPH_YB_DUBOIS, // anaglyph yellow/blue dubois

+    ANAGLYPH_RB_GRAY,   // anaglyph red/blue gray

+    ANAGLYPH_RG_GRAY,   // anaglyph red/green gray

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

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

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

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

+    SIDE_BY_SIDE_LR,    // side by side parallel (left eye left, right eye right)

+    SIDE_BY_SIDE_RL,    // side by side crosseye (right eye left, left eye right)

+    SIDE_BY_SIDE_2_LR,  // side by side parallel with half width resolution

+    SIDE_BY_SIDE_2_RL,  // side by side crosseye with half width resolution

+    ABOVE_BELOW_LR,     // above-below (left eye above, right eye below)

+    ABOVE_BELOW_RL,     // above-below (right eye above, left eye below)

+    ABOVE_BELOW_2_LR,   // above-below with half height resolution

+    ABOVE_BELOW_2_RL,   // above-below with half height resolution

+    STEREO_CODE_COUNT   // TODO: needs autodetection

+};

+

+typedef struct StereoComponent {

+    enum StereoCode format;

+    int width, height;

+    int off_left, off_right;

+    int row_left, row_right;

+} StereoComponent;

+

+static const int ana_coeff[][3][6] = {

+  [ANAGLYPH_RB_GRAY]   =

+    {{19595, 38470,  7471,     0,     0,     0},

+     {    0,     0,     0,     0,     0,     0},

+     {    0,     0,     0, 19595, 38470,  7471}},

+  [ANAGLYPH_RG_GRAY]   =

+    {{19595, 38470,  7471,     0,     0,     0},

+     {    0,     0,     0, 19595, 38470,  7471},

+     {    0,     0,     0,     0,     0,     0}},

+  [ANAGLYPH_RC_GRAY]   =

+    {{19595, 38470,  7471,     0,     0,     0},

+     {    0,     0,     0, 19595, 38470,  7471},

+     {    0,     0,     0, 19595, 38470,  7471}},

+  [ANAGLYPH_RC_HALF]   =

+    {{19595, 38470,  7471,     0,     0,     0},

+     {    0,     0,     0,     0, 65536,     0},

+     {    0,     0,     0,     0,     0, 65536}},

+  [ANAGLYPH_RC_COLOR]  =

+    {{65536,     0,     0,     0,     0,     0},

+     {    0,     0,     0,     0, 65536,     0},

+     {    0,     0,     0,     0,     0, 65536}},

+  [ANAGLYPH_RC_DUBOIS] =

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

+     {-2627, -2479, -1033, 24804, 48080, -1209},

+     { -997, -1350,  -358, -4729, -7403, 80373}},

+  [ANAGLYPH_GM_GRAY]   =

+    {{    0,     0,     0, 19595, 38470,  7471},

+     {19595, 38470,  7471,     0,     0,     0},

+     {    0,     0,     0, 19595, 38470,  7471}},

+  [ANAGLYPH_GM_HALF]   =

+    {{    0,     0,     0, 65536,     0,     0},

+     {19595, 38470,  7471,     0,     0,     0},

+     {    0,     0,     0,     0,     0, 65536}},

+  [ANAGLYPH_GM_COLOR]  =

+    {{    0,     0,     0, 65536,     0,     0},

+     {    0, 65536,     0,     0,     0,     0},

+     {    0,     0,     0,     0,     0, 65536}},

+  [ANAGLYPH_GM_DUBOIS]  =

+    {{-4063,-10354, -2556, 34669, 46203,  1573},

+     {18612, 43778,  9372, -1049,  -983, -4260},

+     { -983, -1769,  1376,   590,  4915, 61407}},

+  [ANAGLYPH_YB_GRAY]   =

+    {{    0,     0,     0, 19595, 38470,  7471},

+     {    0,     0,     0, 19595, 38470,  7471},

+     {19595, 38470,  7471,     0,     0,     0}},

+  [ANAGLYPH_YB_HALF]   =

+    {{    0,     0,     0, 65536,     0,     0},

+     {    0,     0,     0,     0, 65536,     0},

+     {19595, 38470,  7471,     0,     0,     0}},

+  [ANAGLYPH_YB_COLOR]  =

+    {{    0,     0,     0, 65536,     0,     0},

+     {    0,     0,     0,     0, 65536,     0},

+     {    0,     0, 65536,     0,     0,     0}},

+  [ANAGLYPH_YB_DUBOIS] =

+    {{65535,-12650,18451,   -987, -7590, -1049},

+     {-1604, 56032, 4196,    370,  3826, -1049},

+     {-2345,-10676, 1358,   5801, 11416, 56217}},

+};

+

+typedef struct Stereo3DContext {

+    const AVClass *class;

+    StereoComponent in, out;

+    int width, height;

+    int row_step;

+    int ana_matrix[3][6];

+} Stereo3DContext;

+

+#define OFFSET(x) offsetof(Stereo3DContext, x)

+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

+

+static const AVOption stereo3d_options[] = {

+    { "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"},

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

+};

+

+AVFILTER_DEFINE_CLASS(stereo3d);

+

+static av_cold int init(AVFilterContext *ctx, const char *args)

+{

+    Stereo3DContext *s = ctx->priv;

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

+    int ret;

+

+    s->class = &stereo3d_class;

+    av_opt_set_defaults(s);

+

+    if ((ret = av_opt_set_from_string(s, args, shorthand, "=", ":")) < 0)

+        return ret;

+

+    return 0;

+}

+

+static int query_formats(AVFilterContext *ctx)

+{

+    static const enum AVPixelFormat pix_fmts[] = {

+        AV_PIX_FMT_RGB24, AV_PIX_FMT_NONE

+    };

+

+    ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));

+

+    return 0;

+}

+

+static int config_output(AVFilterLink *outlink)

+{

+    AVFilterContext *ctx = outlink->src;

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

+    Stereo3DContext *s = ctx->priv;

+    AVRational aspect = inlink->sample_aspect_ratio;

+

+    s->in.width     =

+    s->width        = inlink->w;

+    s->in.height    =

+    s->height       = inlink->h;

+    s->row_step     = 1;

+    s->in.off_left  =

+    s->in.off_right =

+    s->in.row_left  =

+    s->in.row_right = 0;

+

+    switch (s->in.format) {

+    case SIDE_BY_SIDE_2_LR:

+        aspect.num     *= 2;

+    case SIDE_BY_SIDE_LR:

+        s->width        = inlink->w / 2;

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

+        break;

+    case SIDE_BY_SIDE_2_RL:

+        aspect.num     *= 2;

+    case SIDE_BY_SIDE_RL:

+        s->width        = inlink->w / 2;

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

+        break;

+    case ABOVE_BELOW_2_LR:

+        aspect.den     *= 2;

+    case ABOVE_BELOW_LR:

+        s->in.row_right =

+        s->height       = inlink->h / 2;

+        break;

+    case ABOVE_BELOW_2_RL:

+        aspect.den     *= 2;

+    case ABOVE_BELOW_RL:

+        s->in.row_left  =

+        s->height       = inlink->h / 2;

+        break;

+    default:

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

+        return AVERROR(EINVAL);

+    }

+

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

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

+    s->out.off_left  =

+    s->out.off_right =

+    s->out.row_left  =

+    s->out.row_right = 0;

+

+    switch (s->out.format) {

+    case ANAGLYPH_RB_GRAY:

+    case ANAGLYPH_RG_GRAY:

+    case ANAGLYPH_RC_GRAY:

+    case ANAGLYPH_RC_HALF:

+    case ANAGLYPH_RC_COLOR:

+    case ANAGLYPH_RC_DUBOIS:

+    case ANAGLYPH_GM_GRAY:

+    case ANAGLYPH_GM_HALF:

+    case ANAGLYPH_GM_COLOR:

+    case ANAGLYPH_GM_DUBOIS:

+    case ANAGLYPH_YB_GRAY:

+    case ANAGLYPH_YB_HALF:

+    case ANAGLYPH_YB_COLOR:

+    case ANAGLYPH_YB_DUBOIS:

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

+        break;

+    case SIDE_BY_SIDE_2_LR:

+        aspect.num      /= 2;

+    case SIDE_BY_SIDE_LR:

+        s->out.width     =

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

+        break;

+    case SIDE_BY_SIDE_2_RL:

+        aspect.num      /= 2;

+    case SIDE_BY_SIDE_RL:

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

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

+        break;

+    case ABOVE_BELOW_2_LR:

+        aspect.den      /= 2;

+    case ABOVE_BELOW_LR:

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

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

+        break;

+    case ABOVE_BELOW_2_RL:

+        aspect.den      /= 2;

+    case ABOVE_BELOW_RL:

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

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

+        break;

+    case INTERLEAVE_ROWS_LR:

+        s->row_step      = 2;

+        s->height        = s->height / 2;

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

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

+        break;

+    case INTERLEAVE_ROWS_RL:

+        s->row_step      = 2;

+        s->height        = s->height / 2;

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

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

+        break;

+    case MONO_R:

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

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

+    case MONO_L:

+        break;

+    default:

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

+        return AVERROR(EINVAL);

+    }

+

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

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

+    outlink->sample_aspect_ratio = aspect;

+

+    return 0;

+}

+

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

+{

+    int sum;

+

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

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

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

+

+    return av_clip_uint8(sum >> 16);

+}

+

+static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref)

+{

+    AVFilterContext *ctx  = inlink->dst;

+    Stereo3DContext *s = ctx->priv;

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

+    AVFilterBufferRef *out;

+    int out_off_left, out_off_right;

+    int in_off_left, in_off_right;

+    int ret;

+

+    out = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);

+    if (!out) {

+        avfilter_unref_bufferp(&inpicref);

+        return AVERROR(ENOMEM);

+    }

+

+    out->pts = inpicref->pts;

+    out->pos = inpicref->pos;

+

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

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

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

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

+

+    switch (s->out.format) {

+    case SIDE_BY_SIDE_LR:

+    case SIDE_BY_SIDE_RL:

+    case SIDE_BY_SIDE_2_LR:

+    case SIDE_BY_SIDE_2_RL:

+    case ABOVE_BELOW_LR:

+    case ABOVE_BELOW_RL:

+    case ABOVE_BELOW_2_LR:

+    case ABOVE_BELOW_2_RL:

+    case INTERLEAVE_ROWS_LR:

+    case INTERLEAVE_ROWS_RL:

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

+                            out->linesize[0] * s->row_step,

+                            inpicref->data[0] + in_off_left,

+                            inpicref->linesize[0] * s->row_step,

+                            3 * s->width, s->height);

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

+                            out->linesize[0] * s->row_step,

+                            inpicref->data[0] + in_off_right,

+                            inpicref->linesize[0] * s->row_step,

+                            3 * s->width, s->height);

+        break;

+    case MONO_L:

+    case MONO_R:

+        av_image_copy_plane(out->data[0], out->linesize[0],

+                            inpicref->data[0] + in_off_left,

+                            inpicref->linesize[0],

+                            3 * s->width, s->height);

+        break;

+    case ANAGLYPH_RB_GRAY:

+    case ANAGLYPH_RG_GRAY:

+    case ANAGLYPH_RC_GRAY:

+    case ANAGLYPH_RC_HALF:

+    case ANAGLYPH_RC_COLOR:

+    case ANAGLYPH_RC_DUBOIS:

+    case ANAGLYPH_GM_GRAY:

+    case ANAGLYPH_GM_HALF:

+    case ANAGLYPH_GM_COLOR:

+    case ANAGLYPH_GM_DUBOIS:

+    case ANAGLYPH_YB_GRAY:

+    case ANAGLYPH_YB_HALF:

+    case ANAGLYPH_YB_COLOR:

+    case ANAGLYPH_YB_DUBOIS: {

+        int i, x, y, il, ir, o;

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

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

+        int out_width = s->out.width;

+        int *ana_matrix[3];

+

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

+            ana_matrix[i] = s->ana_matrix[i];

+

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

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

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

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

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

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

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

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

+            }

+        }

+        break;

+    }

+    default:

+        av_assert0(0);

+    }

+

+    ret = ff_filter_frame(outlink, out);

+    avfilter_unref_bufferp(&inpicref);

+    if (ret < 0)

+        return ret;

+    return 0;

+}

+

+static av_cold void uninit(AVFilterContext *ctx)

+{

+    Stereo3DContext *s = ctx->priv;

+

+    av_opt_free(s);

+}

+

+static const AVFilterPad stereo3d_inputs[] = {

+    {

+        .name             = "default",

+        .type             = AVMEDIA_TYPE_VIDEO,

+        .get_video_buffer = ff_null_get_video_buffer,

+        .filter_frame     = filter_frame,

+        .min_perms        = AV_PERM_READ,

+    },

+    { NULL }

+};

+

+static const AVFilterPad stereo3d_outputs[] = {

+    {

+        .name         = "default",

+        .type         = AVMEDIA_TYPE_VIDEO,

+        .config_props = config_output,

+        .min_perms    = AV_PERM_WRITE,

+    },

+    { NULL }

+};

+

+AVFilter avfilter_vf_stereo3d = {

+    .name          = "stereo3d",

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

+    .priv_size     = sizeof(Stereo3DContext),

+    .init          = init,

+    .uninit        = uninit,

+    .query_formats = query_formats,

+    .inputs        = stereo3d_inputs,

+    .outputs       = stereo3d_outputs,

+    .priv_class    = &stereo3d_class,

+};