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vf_stereo3d.c
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/*
* Copyright (c) 2010 Gordon Schmidt <gordon.schmidt <at> s2000.tu-chemnitz.de>
* Copyright (c) 2013-2015 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/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "drawutils.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
#include "stereo3d.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
ALTERNATING_LR, // alternating frames (left eye first, right eye second)
ALTERNATING_RL, // alternating frames (right eye first, left eye second)
CHECKERBOARD_LR, // checkerboard pattern (left eye first, right eye second)
CHECKERBOARD_RL, // checkerboard pattern (right eye first, left eye second)
INTERLEAVE_COLS_LR, // column-interleave (left eye first, right eye second)
INTERLEAVE_COLS_RL, // column-interleave (right eye first, left eye second)
HDMI, // HDMI frame pack (left eye first, right eye second)
STEREO_CODE_COUNT // TODO: needs autodetection
};
typedef struct StereoComponent {
int format; ///< StereoCode
int width, height;
int off_left, off_right;
int off_lstep, off_rstep;
int row_left, row_right;
int row_step;
} 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] =
{{29884, 32768, 11534, -2818, -5767, -131},
{-2621, -2490, -1049, 24773, 48103, -1180},
{ -983, -1376, -328, -4719, -7406, 80347}},
[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] =
{{69599,-13435,19595, -1048, -8061, -1114},
{-1704, 59507, 4456, 393, 4063, -1114},
{-2490,-11338, 1442, 6160, 12124, 59703}},
};
typedef struct Stereo3DContext {
const AVClass *class;
StereoComponent in, out;
int width, height;
const int *ana_matrix[3];
int nb_planes;
int linesize[4];
int pheight[4];
int hsub, vsub;
int pixstep[4];
AVFrame *prev;
int blanks;
int in_off_left[4], in_off_right[4];
AVRational aspect;
Stereo3DDSPContext dsp;
} 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}, INTERLEAVE_ROWS_LR, STEREO_CODE_COUNT-1, FLAGS, .unit = "in"},
{ "ab2l", "above below half height left first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_2_LR}, 0, 0, FLAGS, .unit = "in" },
{ "tb2l", "above below half height left first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_2_LR}, 0, 0, FLAGS, .unit = "in" },
{ "ab2r", "above below half height right first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_2_RL}, 0, 0, FLAGS, .unit = "in" },
{ "tb2r", "above below half height right first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_2_RL}, 0, 0, FLAGS, .unit = "in" },
{ "abl", "above below left first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_LR}, 0, 0, FLAGS, .unit = "in" },
{ "tbl", "above below left first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_LR}, 0, 0, FLAGS, .unit = "in" },
{ "abr", "above below right first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_RL}, 0, 0, FLAGS, .unit = "in" },
{ "tbr", "above below right first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_RL}, 0, 0, FLAGS, .unit = "in" },
{ "al", "alternating frames left first", 0, AV_OPT_TYPE_CONST, {.i64=ALTERNATING_LR}, 0, 0, FLAGS, .unit = "in" },
{ "ar", "alternating frames right first", 0, AV_OPT_TYPE_CONST, {.i64=ALTERNATING_RL}, 0, 0, FLAGS, .unit = "in" },
{ "sbs2l", "side by side half width left first", 0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_2_LR}, 0, 0, FLAGS, .unit = "in" },
{ "sbs2r", "side by side half width right first", 0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_2_RL}, 0, 0, FLAGS, .unit = "in" },
{ "sbsl", "side by side left first", 0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_LR}, 0, 0, FLAGS, .unit = "in" },
{ "sbsr", "side by side right first", 0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_RL}, 0, 0, FLAGS, .unit = "in" },
{ "irl", "interleave rows left first", 0, AV_OPT_TYPE_CONST, {.i64=INTERLEAVE_ROWS_LR}, 0, 0, FLAGS, .unit = "in" },
{ "irr", "interleave rows right first", 0, AV_OPT_TYPE_CONST, {.i64=INTERLEAVE_ROWS_RL}, 0, 0, FLAGS, .unit = "in" },
{ "icl", "interleave columns left first", 0, AV_OPT_TYPE_CONST, {.i64=INTERLEAVE_COLS_LR}, 0, 0, FLAGS, .unit = "in" },
{ "icr", "interleave columns right first", 0, AV_OPT_TYPE_CONST, {.i64=INTERLEAVE_COLS_RL}, 0, 0, FLAGS, .unit = "in" },
{ "out", "set output format", OFFSET(out.format), AV_OPT_TYPE_INT, {.i64=ANAGLYPH_RC_DUBOIS}, 0, STEREO_CODE_COUNT-1, FLAGS, .unit = "out"},
{ "ab2l", "above below half height left first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_2_LR}, 0, 0, FLAGS, .unit = "out" },
{ "tb2l", "above below half height left first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_2_LR}, 0, 0, FLAGS, .unit = "out" },
{ "ab2r", "above below half height right first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_2_RL}, 0, 0, FLAGS, .unit = "out" },
{ "tb2r", "above below half height right first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_2_RL}, 0, 0, FLAGS, .unit = "out" },
{ "abl", "above below left first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_LR}, 0, 0, FLAGS, .unit = "out" },
{ "tbl", "above below left first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_LR}, 0, 0, FLAGS, .unit = "out" },
{ "abr", "above below right first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_RL}, 0, 0, FLAGS, .unit = "out" },
{ "tbr", "above below right first", 0, AV_OPT_TYPE_CONST, {.i64=ABOVE_BELOW_RL}, 0, 0, FLAGS, .unit = "out" },
{ "agmc", "anaglyph green magenta color", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_GM_COLOR}, 0, 0, FLAGS, .unit = "out" },
{ "agmd", "anaglyph green magenta dubois", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_GM_DUBOIS}, 0, 0, FLAGS, .unit = "out" },
{ "agmg", "anaglyph green magenta gray", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_GM_GRAY}, 0, 0, FLAGS, .unit = "out" },
{ "agmh", "anaglyph green magenta half color", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_GM_HALF}, 0, 0, FLAGS, .unit = "out" },
{ "al", "alternating frames left first", 0, AV_OPT_TYPE_CONST, {.i64=ALTERNATING_LR}, 0, 0, FLAGS, .unit = "out" },
{ "ar", "alternating frames right first", 0, AV_OPT_TYPE_CONST, {.i64=ALTERNATING_RL}, 0, 0, FLAGS, .unit = "out" },
{ "arbg", "anaglyph red blue gray", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_RB_GRAY}, 0, 0, FLAGS, .unit = "out" },
{ "arcc", "anaglyph red cyan color", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_RC_COLOR}, 0, 0, FLAGS, .unit = "out" },
{ "arcd", "anaglyph red cyan dubois", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_RC_DUBOIS}, 0, 0, FLAGS, .unit = "out" },
{ "arcg", "anaglyph red cyan gray", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_RC_GRAY}, 0, 0, FLAGS, .unit = "out" },
{ "arch", "anaglyph red cyan half color", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_RC_HALF}, 0, 0, FLAGS, .unit = "out" },
{ "argg", "anaglyph red green gray", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_RG_GRAY}, 0, 0, FLAGS, .unit = "out" },
{ "aybc", "anaglyph yellow blue color", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_YB_COLOR}, 0, 0, FLAGS, .unit = "out" },
{ "aybd", "anaglyph yellow blue dubois", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_YB_DUBOIS}, 0, 0, FLAGS, .unit = "out" },
{ "aybg", "anaglyph yellow blue gray", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_YB_GRAY}, 0, 0, FLAGS, .unit = "out" },
{ "aybh", "anaglyph yellow blue half color", 0, AV_OPT_TYPE_CONST, {.i64=ANAGLYPH_YB_HALF}, 0, 0, FLAGS, .unit = "out" },
{ "irl", "interleave rows left first", 0, AV_OPT_TYPE_CONST, {.i64=INTERLEAVE_ROWS_LR}, 0, 0, FLAGS, .unit = "out" },
{ "irr", "interleave rows right first", 0, AV_OPT_TYPE_CONST, {.i64=INTERLEAVE_ROWS_RL}, 0, 0, FLAGS, .unit = "out" },
{ "ml", "mono left", 0, AV_OPT_TYPE_CONST, {.i64=MONO_L}, 0, 0, FLAGS, .unit = "out" },
{ "mr", "mono right", 0, AV_OPT_TYPE_CONST, {.i64=MONO_R}, 0, 0, FLAGS, .unit = "out" },
{ "sbs2l", "side by side half width left first", 0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_2_LR}, 0, 0, FLAGS, .unit = "out" },
{ "sbs2r", "side by side half width right first", 0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_2_RL}, 0, 0, FLAGS, .unit = "out" },
{ "sbsl", "side by side left first", 0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_LR}, 0, 0, FLAGS, .unit = "out" },
{ "sbsr", "side by side right first", 0, AV_OPT_TYPE_CONST, {.i64=SIDE_BY_SIDE_RL}, 0, 0, FLAGS, .unit = "out" },
{ "chl", "checkerboard left first", 0, AV_OPT_TYPE_CONST, {.i64=CHECKERBOARD_LR}, 0, 0, FLAGS, .unit = "out" },
{ "chr", "checkerboard right first", 0, AV_OPT_TYPE_CONST, {.i64=CHECKERBOARD_RL}, 0, 0, FLAGS, .unit = "out" },
{ "icl", "interleave columns left first", 0, AV_OPT_TYPE_CONST, {.i64=INTERLEAVE_COLS_LR}, 0, 0, FLAGS, .unit = "out" },
{ "icr", "interleave columns right first", 0, AV_OPT_TYPE_CONST, {.i64=INTERLEAVE_COLS_RL}, 0, 0, FLAGS, .unit = "out" },
{ "hdmi", "HDMI frame pack", 0, AV_OPT_TYPE_CONST, {.i64=HDMI}, 0, 0, FLAGS, .unit = "out" },
{ NULL }
};
AVFILTER_DEFINE_CLASS(stereo3d);
static const enum AVPixelFormat anaglyph_pix_fmts[] = {
AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat other_pix_fmts[] = {
AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
AV_PIX_FMT_RGB48BE, AV_PIX_FMT_BGR48BE,
AV_PIX_FMT_RGB48LE, AV_PIX_FMT_BGR48LE,
AV_PIX_FMT_RGBA64BE, AV_PIX_FMT_BGRA64BE,
AV_PIX_FMT_RGBA64LE, AV_PIX_FMT_BGRA64LE,
AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0,
AV_PIX_FMT_0RGB, AV_PIX_FMT_0BGR,
AV_PIX_FMT_GBRP,
AV_PIX_FMT_GBRP9BE, AV_PIX_FMT_GBRP9LE,
AV_PIX_FMT_GBRP10BE, AV_PIX_FMT_GBRP10LE,
AV_PIX_FMT_GBRP12BE, AV_PIX_FMT_GBRP12LE,
AV_PIX_FMT_GBRP14BE, AV_PIX_FMT_GBRP14LE,
AV_PIX_FMT_GBRP16BE, AV_PIX_FMT_GBRP16LE,
AV_PIX_FMT_YUV410P,
AV_PIX_FMT_YUV411P,
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVA420P,
AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA422P,
AV_PIX_FMT_YUV440P,
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P,
AV_PIX_FMT_YUVJ411P,
AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUVJ422P,
AV_PIX_FMT_YUVJ440P,
AV_PIX_FMT_YUVJ444P,
AV_PIX_FMT_YUV420P9LE, AV_PIX_FMT_YUVA420P9LE,
AV_PIX_FMT_YUV420P9BE, AV_PIX_FMT_YUVA420P9BE,
AV_PIX_FMT_YUV422P9LE, AV_PIX_FMT_YUVA422P9LE,
AV_PIX_FMT_YUV422P9BE, AV_PIX_FMT_YUVA422P9BE,
AV_PIX_FMT_YUV444P9LE, AV_PIX_FMT_YUVA444P9LE,
AV_PIX_FMT_YUV444P9BE, AV_PIX_FMT_YUVA444P9BE,
AV_PIX_FMT_YUV420P10LE, AV_PIX_FMT_YUVA420P10LE,
AV_PIX_FMT_YUV420P10BE, AV_PIX_FMT_YUVA420P10BE,
AV_PIX_FMT_YUV422P10LE, AV_PIX_FMT_YUVA422P10LE,
AV_PIX_FMT_YUV422P10BE, AV_PIX_FMT_YUVA422P10BE,
AV_PIX_FMT_YUV444P10LE, AV_PIX_FMT_YUVA444P10LE,
AV_PIX_FMT_YUV444P10BE, AV_PIX_FMT_YUVA444P10BE,
AV_PIX_FMT_YUV420P12BE, AV_PIX_FMT_YUV420P12LE,
AV_PIX_FMT_YUV422P12BE, AV_PIX_FMT_YUV422P12LE,
AV_PIX_FMT_YUV444P12BE, AV_PIX_FMT_YUV444P12LE,
AV_PIX_FMT_YUV420P14BE, AV_PIX_FMT_YUV420P14LE,
AV_PIX_FMT_YUV422P14BE, AV_PIX_FMT_YUV422P14LE,
AV_PIX_FMT_YUV444P14BE, AV_PIX_FMT_YUV444P14LE,
AV_PIX_FMT_YUV420P16LE, AV_PIX_FMT_YUVA420P16LE,
AV_PIX_FMT_YUV420P16BE, AV_PIX_FMT_YUVA420P16BE,
AV_PIX_FMT_YUV422P16LE, AV_PIX_FMT_YUVA422P16LE,
AV_PIX_FMT_YUV422P16BE, AV_PIX_FMT_YUVA422P16BE,
AV_PIX_FMT_YUV444P16LE, AV_PIX_FMT_YUVA444P16LE,
AV_PIX_FMT_YUV444P16BE, AV_PIX_FMT_YUVA444P16BE,
AV_PIX_FMT_NONE
};
static int query_formats(AVFilterContext *ctx)
{
Stereo3DContext *s = ctx->priv;
const enum AVPixelFormat *pix_fmts;
switch (s->out.format) {
case ANAGLYPH_GM_COLOR:
case ANAGLYPH_GM_DUBOIS:
case ANAGLYPH_GM_GRAY:
case ANAGLYPH_GM_HALF:
case ANAGLYPH_RB_GRAY:
case ANAGLYPH_RC_COLOR:
case ANAGLYPH_RC_DUBOIS:
case ANAGLYPH_RC_GRAY:
case ANAGLYPH_RC_HALF:
case ANAGLYPH_RG_GRAY:
case ANAGLYPH_YB_COLOR:
case ANAGLYPH_YB_DUBOIS:
case ANAGLYPH_YB_GRAY:
case ANAGLYPH_YB_HALF:
pix_fmts = anaglyph_pix_fmts;
break;
default:
pix_fmts = other_pix_fmts;
}
return ff_set_common_formats_from_list(ctx, pix_fmts);
}
static inline uint8_t ana_convert(const int *coeff, const uint8_t *left, const 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 void anaglyph_ic(uint8_t *dst, uint8_t *lsrc, uint8_t *rsrc,
ptrdiff_t dst_linesize, ptrdiff_t l_linesize, ptrdiff_t r_linesize,
int width, int height,
const int *ana_matrix_r, const int *ana_matrix_g, const int *ana_matrix_b)
{
int x, y, o;
for (y = 0; y < height; y++) {
for (o = 0, x = 0; x < width; x++, o+= 3) {
dst[o ] = ana_convert(ana_matrix_r, lsrc + o * 2, rsrc + o * 2);
dst[o + 1] = ana_convert(ana_matrix_g, lsrc + o * 2, rsrc + o * 2);
dst[o + 2] = ana_convert(ana_matrix_b, lsrc + o * 2, rsrc + o * 2);
}
dst += dst_linesize;
lsrc += l_linesize;
rsrc += r_linesize;
}
}
static void anaglyph(uint8_t *dst, uint8_t *lsrc, uint8_t *rsrc,
ptrdiff_t dst_linesize, ptrdiff_t l_linesize, ptrdiff_t r_linesize,
int width, int height,
const int *ana_matrix_r, const int *ana_matrix_g, const int *ana_matrix_b)
{
int x, y, o;
for (y = 0; y < height; y++) {
for (o = 0, x = 0; x < width; x++, o+= 3) {
dst[o ] = ana_convert(ana_matrix_r, lsrc + o, rsrc + o);
dst[o + 1] = ana_convert(ana_matrix_g, lsrc + o, rsrc + o);
dst[o + 2] = ana_convert(ana_matrix_b, lsrc + o, rsrc + o);
}
dst += dst_linesize;
lsrc += l_linesize;
rsrc += r_linesize;
}
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink = ctx->inputs[0];
Stereo3DContext *s = ctx->priv;
AVRational fps = inlink->frame_rate;
AVRational tb = inlink->time_base;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format);
int ret;
s->aspect = inlink->sample_aspect_ratio;
switch (s->in.format) {
case INTERLEAVE_COLS_LR:
case INTERLEAVE_COLS_RL:
case SIDE_BY_SIDE_2_LR:
case SIDE_BY_SIDE_LR:
case SIDE_BY_SIDE_2_RL:
case SIDE_BY_SIDE_RL:
if (inlink->w & 1) {
av_log(ctx, AV_LOG_ERROR, "width must be even\n");
return AVERROR_INVALIDDATA;
}
break;
case INTERLEAVE_ROWS_LR:
case INTERLEAVE_ROWS_RL:
case ABOVE_BELOW_2_LR:
case ABOVE_BELOW_LR:
case ABOVE_BELOW_2_RL:
case ABOVE_BELOW_RL:
if (inlink->h & 1) {
av_log(ctx, AV_LOG_ERROR, "height must be even\n");
return AVERROR_INVALIDDATA;
}
break;
}
s->in.width =
s->width = inlink->w;
s->in.height =
s->height = inlink->h;
s->in.off_lstep =
s->in.off_rstep =
s->in.off_left =
s->in.off_right =
s->in.row_left =
s->in.row_right = 0;
s->in.row_step = 1;
switch (s->in.format) {
case SIDE_BY_SIDE_2_LR:
s->aspect.num *= 2;
case SIDE_BY_SIDE_LR:
s->width = inlink->w / 2;
s->in.off_right = s->width;
break;
case SIDE_BY_SIDE_2_RL:
s->aspect.num *= 2;
case SIDE_BY_SIDE_RL:
s->width = inlink->w / 2;
s->in.off_left = s->width;
break;
case ABOVE_BELOW_2_LR:
s->aspect.den *= 2;
case ABOVE_BELOW_LR:
s->in.row_right =
s->height = inlink->h / 2;
break;
case ABOVE_BELOW_2_RL:
s->aspect.den *= 2;
case ABOVE_BELOW_RL:
s->in.row_left =
s->height = inlink->h / 2;
break;
case ALTERNATING_RL:
case ALTERNATING_LR:
fps.den *= 2;
tb.num *= 2;
break;
case INTERLEAVE_COLS_RL:
case INTERLEAVE_COLS_LR:
s->width = inlink->w / 2;
break;
case INTERLEAVE_ROWS_LR:
case INTERLEAVE_ROWS_RL:
s->in.row_step = 2;
if (s->in.format == INTERLEAVE_ROWS_RL)
s->in.off_lstep = 1;
else
s->in.off_rstep = 1;
if (s->out.format != CHECKERBOARD_LR &&
s->out.format != CHECKERBOARD_RL)
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_lstep =
s->out.off_rstep =
s->out.off_left =
s->out.off_right =
s->out.row_left =
s->out.row_right = 0;
s->out.row_step = 1;
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: {
uint8_t rgba_map[4];
ff_fill_rgba_map(rgba_map, outlink->format);
s->ana_matrix[rgba_map[0]] = &ana_coeff[s->out.format][0][0];
s->ana_matrix[rgba_map[1]] = &ana_coeff[s->out.format][1][0];
s->ana_matrix[rgba_map[2]] = &ana_coeff[s->out.format][2][0];
break;
}
case SIDE_BY_SIDE_2_LR:
s->aspect.den *= 2;
case SIDE_BY_SIDE_LR:
s->out.width = s->width * 2;
s->out.off_right = s->width;
break;
case SIDE_BY_SIDE_2_RL:
s->aspect.den *= 2;
case SIDE_BY_SIDE_RL:
s->out.width = s->width * 2;
s->out.off_left = s->width;
break;
case ABOVE_BELOW_2_LR:
s->aspect.num *= 2;
case ABOVE_BELOW_LR:
s->out.height = s->height * 2;
s->out.row_right = s->height;
break;
case HDMI:
if (s->height != 720 && s->height != 1080) {
av_log(ctx, AV_LOG_ERROR, "Only 720 and 1080 height supported\n");
return AVERROR(EINVAL);
}
s->blanks = s->height / 24;
s->out.height = s->height * 2 + s->blanks;
s->out.row_right = s->height + s->blanks;
break;
case ABOVE_BELOW_2_RL:
s->aspect.num *= 2;
case ABOVE_BELOW_RL:
s->out.height = s->height * 2;
s->out.row_left = s->height;
break;
case INTERLEAVE_ROWS_LR:
s->in.row_step = 1 + (s->in.format == INTERLEAVE_ROWS_RL);
s->out.row_step = 2;
s->out.height = s->height * 2;
s->out.off_rstep = 1;
break;
case INTERLEAVE_ROWS_RL:
s->in.row_step = 1 + (s->in.format == INTERLEAVE_ROWS_LR);
s->out.row_step = 2;
s->out.height = s->height * 2;
s->out.off_lstep = 1;
break;
case MONO_R:
if (s->in.format != INTERLEAVE_COLS_LR) {
s->in.off_left = s->in.off_right;
s->in.row_left = s->in.row_right;
}
if (s->in.format == INTERLEAVE_ROWS_LR)
FFSWAP(int, s->in.off_lstep, s->in.off_rstep);
break;
case MONO_L:
if (s->in.format == INTERLEAVE_ROWS_RL)
FFSWAP(int, s->in.off_lstep, s->in.off_rstep);
break;
case ALTERNATING_RL:
case ALTERNATING_LR:
fps.num *= 2;
tb.den *= 2;
break;
case CHECKERBOARD_LR:
case CHECKERBOARD_RL:
case INTERLEAVE_COLS_LR:
case INTERLEAVE_COLS_RL:
s->out.width = s->width * 2;
break;
default:
av_log(ctx, AV_LOG_ERROR, "output format %d is not supported\n", s->out.format);
return AVERROR(EINVAL);
}
if (s->in.format == INTERLEAVE_COLS_LR || s->in.format == INTERLEAVE_COLS_RL) {
if ((s->in.format & 1) != (s->out.format & 1)) {
FFSWAP(int, s->in.row_left, s->in.row_right);
FFSWAP(int, s->in.off_lstep, s->in.off_rstep);
FFSWAP(int, s->in.off_left, s->in.off_right);
FFSWAP(int, s->out.row_left, s->out.row_right);
FFSWAP(int, s->out.off_lstep, s->out.off_rstep);
FFSWAP(int, s->out.off_left, s->out.off_right);
}
}
outlink->w = s->out.width;
outlink->h = s->out.height;
outlink->frame_rate = fps;
outlink->time_base = tb;
outlink->sample_aspect_ratio = s->aspect;
if ((ret = av_image_fill_linesizes(s->linesize, outlink->format, s->width)) < 0)
return ret;
s->nb_planes = av_pix_fmt_count_planes(outlink->format);
av_image_fill_max_pixsteps(s->pixstep, NULL, desc);
s->pheight[1] = s->pheight[2] = AV_CEIL_RSHIFT(s->height, desc->log2_chroma_h);
s->pheight[0] = s->pheight[3] = s->height;
s->hsub = desc->log2_chroma_w;
s->vsub = desc->log2_chroma_h;
s->dsp.anaglyph = anaglyph;
#if ARCH_X86
ff_stereo3d_init_x86(&s->dsp);
#endif
return 0;
}
typedef struct ThreadData {
AVFrame *ileft, *iright;
AVFrame *out;
} ThreadData;
static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
Stereo3DContext *s = ctx->priv;
ThreadData *td = arg;
AVFrame *ileft = td->ileft;
AVFrame *iright = td->iright;
AVFrame *out = td->out;
int height = s->out.height;
int start = (height * jobnr ) / nb_jobs;
int end = (height * (jobnr+1)) / nb_jobs;
const int **ana_matrix = s->ana_matrix;
s->dsp.anaglyph(out->data[0] + out->linesize[0] * start,
ileft ->data[0] + s->in_off_left [0] + ileft->linesize[0] * start * s->in.row_step,
iright->data[0] + s->in_off_right[0] + iright->linesize[0] * start * s->in.row_step,
out->linesize[0],
ileft->linesize[0] * s->in.row_step,
iright->linesize[0] * s->in.row_step,
s->out.width, end - start,
ana_matrix[0], ana_matrix[1], ana_matrix[2]);
return 0;
}
static void interleave_cols_to_any(Stereo3DContext *s, int *out_off, int p, AVFrame *in, AVFrame *out, int d)
{
int y, x;
for (y = 0; y < s->pheight[p]; y++) {
const uint8_t *src = (const uint8_t*)in->data[p] + y * in->linesize[p] + d * s->pixstep[p];
uint8_t *dst = out->data[p] + out_off[p] + y * out->linesize[p] * s->out.row_step;
switch (s->pixstep[p]) {
case 1:
for (x = 0; x < s->linesize[p]; x++)
dst[x] = src[x * 2];
break;
case 2:
for (x = 0; x < s->linesize[p]; x+=2)
AV_WN16(&dst[x], AV_RN16(&src[x * 2]));
break;
case 3:
for (x = 0; x < s->linesize[p]; x+=3)
AV_WB24(&dst[x], AV_RB24(&src[x * 2]));
break;
case 4:
for (x = 0; x < s->linesize[p]; x+=4)
AV_WN32(&dst[x], AV_RN32(&src[x * 2]));
break;
case 6:
for (x = 0; x < s->linesize[p]; x+=6)
AV_WB48(&dst[x], AV_RB48(&src[x * 2]));
break;
case 8:
for (x = 0; x < s->linesize[p]; x+=8)
AV_WN64(&dst[x], AV_RN64(&src[x * 2]));
break;
}
}
}
static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
{
AVFilterContext *ctx = inlink->dst;
Stereo3DContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out = NULL, *oleft, *oright, *ileft, *iright;
int out_off_left[4], out_off_right[4];
int i, ret;
if (s->in.format == s->out.format)
return ff_filter_frame(outlink, inpicref);
switch (s->out.format) {
case ALTERNATING_LR:
case ALTERNATING_RL:
if (!s->prev) {
s->prev = inpicref;
return 0;
}
break;
};
switch (s->in.format) {
case ALTERNATING_LR:
case ALTERNATING_RL:
if (!s->prev) {
s->prev = inpicref;
return 0;
}
ileft = s->prev;
iright = inpicref;
if (s->in.format == ALTERNATING_RL)
FFSWAP(AVFrame *, ileft, iright);
break;
default:
ileft = iright = inpicref;
};
if ((s->out.format == ALTERNATING_LR ||
s->out.format == ALTERNATING_RL) &&
(s->in.format == SIDE_BY_SIDE_LR ||
s->in.format == SIDE_BY_SIDE_RL ||
s->in.format == SIDE_BY_SIDE_2_LR ||
s->in.format == SIDE_BY_SIDE_2_RL ||
s->in.format == ABOVE_BELOW_LR ||
s->in.format == ABOVE_BELOW_RL ||
s->in.format == ABOVE_BELOW_2_LR ||
s->in.format == ABOVE_BELOW_2_RL ||
s->in.format == INTERLEAVE_ROWS_LR ||
s->in.format == INTERLEAVE_ROWS_RL)) {
oright = av_frame_clone(s->prev);
oleft = av_frame_clone(s->prev);
if (!oright || !oleft) {
av_frame_free(&oright);
av_frame_free(&oleft);
av_frame_free(&s->prev);
av_frame_free(&inpicref);
return AVERROR(ENOMEM);
}
} else if ((s->out.format == MONO_L ||
s->out.format == MONO_R) &&
(s->in.format == SIDE_BY_SIDE_LR ||
s->in.format == SIDE_BY_SIDE_RL ||
s->in.format == SIDE_BY_SIDE_2_LR ||
s->in.format == SIDE_BY_SIDE_2_RL ||
s->in.format == ABOVE_BELOW_LR ||
s->in.format == ABOVE_BELOW_RL ||
s->in.format == ABOVE_BELOW_2_LR ||
s->in.format == ABOVE_BELOW_2_RL ||
s->in.format == INTERLEAVE_ROWS_LR ||
s->in.format == INTERLEAVE_ROWS_RL)) {
out = oleft = oright = av_frame_clone(inpicref);
if (!out) {
av_frame_free(&s->prev);
av_frame_free(&inpicref);
return AVERROR(ENOMEM);
}
} else if ((s->out.format == MONO_L && s->in.format == ALTERNATING_LR) ||
(s->out.format == MONO_R && s->in.format == ALTERNATING_RL)) {
s->prev->pts /= 2;
ret = ff_filter_frame(outlink, s->prev);
av_frame_free(&inpicref);
s->prev = NULL;
return ret;
} else if ((s->out.format == MONO_L && s->in.format == ALTERNATING_RL) ||
(s->out.format == MONO_R && s->in.format == ALTERNATING_LR)) {
av_frame_free(&s->prev);
inpicref->pts /= 2;
return ff_filter_frame(outlink, inpicref);
} else if ((s->out.format == ALTERNATING_LR && s->in.format == ALTERNATING_RL) ||
(s->out.format == ALTERNATING_RL && s->in.format == ALTERNATING_LR)) {
FFSWAP(int64_t, s->prev->pts, inpicref->pts);
ff_filter_frame(outlink, inpicref);
ret = ff_filter_frame(outlink, s->prev);
s->prev = NULL;
return ret;
} else {
out = oleft = oright = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
av_frame_free(&s->prev);
av_frame_free(&inpicref);
return AVERROR(ENOMEM);
}
av_frame_copy_props(out, inpicref);
if (s->out.format == ALTERNATING_LR ||
s->out.format == ALTERNATING_RL) {
oright = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!oright) {
av_frame_free(&oleft);
av_frame_free(&s->prev);
av_frame_free(&inpicref);
return AVERROR(ENOMEM);
}
av_frame_copy_props(oright, s->prev);
}
}
for (i = 0; i < 4; i++) {
int hsub = i == 1 || i == 2 ? s->hsub : 0;
int vsub = i == 1 || i == 2 ? s->vsub : 0;
s->in_off_left[i] = (AV_CEIL_RSHIFT(s->in.row_left, vsub) + s->in.off_lstep) * ileft->linesize[i] + AV_CEIL_RSHIFT(s->in.off_left * s->pixstep[i], hsub);
s->in_off_right[i] = (AV_CEIL_RSHIFT(s->in.row_right, vsub) + s->in.off_rstep) * iright->linesize[i] + AV_CEIL_RSHIFT(s->in.off_right * s->pixstep[i], hsub);
out_off_left[i] = (AV_CEIL_RSHIFT(s->out.row_left, vsub) + s->out.off_lstep) * oleft->linesize[i] + AV_CEIL_RSHIFT(s->out.off_left * s->pixstep[i], hsub);
out_off_right[i] = (AV_CEIL_RSHIFT(s->out.row_right, vsub) + s->out.off_rstep) * oright->linesize[i] + AV_CEIL_RSHIFT(s->out.off_right * s->pixstep[i], hsub);
}
switch (s->out.format) {
case ALTERNATING_LR:
case ALTERNATING_RL:
switch (s->in.format) {
case INTERLEAVE_ROWS_LR:
case INTERLEAVE_ROWS_RL:
for (i = 0; i < s->nb_planes; i++) {
oleft->linesize[i] *= 2;
oright->linesize[i] *= 2;
}
case ABOVE_BELOW_LR:
case ABOVE_BELOW_RL:
case ABOVE_BELOW_2_LR:
case ABOVE_BELOW_2_RL:
case SIDE_BY_SIDE_LR:
case SIDE_BY_SIDE_RL:
case SIDE_BY_SIDE_2_LR:
case SIDE_BY_SIDE_2_RL:
oleft->width = outlink->w;
oright->width = outlink->w;
oleft->height = outlink->h;
oright->height = outlink->h;
for (i = 0; i < s->nb_planes; i++) {
oleft->data[i] += s->in_off_left[i];
oright->data[i] += s->in_off_right[i];
}
break;
default:
goto copy;
break;
}
break;
case HDMI:
for (i = 0; i < s->nb_planes; i++) {
int j, h = s->height >> ((i == 1 || i == 2) ? s->vsub : 0);
int b = (s->blanks) >> ((i == 1 || i == 2) ? s->vsub : 0);
for (j = h; j < h + b; j++)
memset(oleft->data[i] + j * s->linesize[i], 0, s->linesize[i]);
}
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:
copy:
if (s->in.format == INTERLEAVE_COLS_LR ||
s->in.format == INTERLEAVE_COLS_RL) {
for (i = 0; i < s->nb_planes; i++) {
int d = (s->in.format & 1) != (s->out.format & 1);
interleave_cols_to_any(s, out_off_left, i, ileft, oleft, d);
interleave_cols_to_any(s, out_off_right, i, iright, oright, !d);
}
} else {
for (i = 0; i < s->nb_planes; i++) {
av_image_copy_plane(oleft->data[i] + out_off_left[i],
oleft->linesize[i] * s->out.row_step,
ileft->data[i] + s->in_off_left[i],
ileft->linesize[i] * s->in.row_step,
s->linesize[i], s->pheight[i]);
av_image_copy_plane(oright->data[i] + out_off_right[i],
oright->linesize[i] * s->out.row_step,
iright->data[i] + s->in_off_right[i],
iright->linesize[i] * s->in.row_step,
s->linesize[i], s->pheight[i]);
}
}
break;
case MONO_L:
iright = ileft;
case MONO_R:
switch (s->in.format) {
case INTERLEAVE_ROWS_LR:
case INTERLEAVE_ROWS_RL:
for (i = 0; i < s->nb_planes; i++) {
out->linesize[i] *= 2;
}
case ABOVE_BELOW_LR:
case ABOVE_BELOW_RL:
case ABOVE_BELOW_2_LR:
case ABOVE_BELOW_2_RL:
case SIDE_BY_SIDE_LR:
case SIDE_BY_SIDE_RL:
case SIDE_BY_SIDE_2_LR:
case SIDE_BY_SIDE_2_RL:
out->width = outlink->w;
out->height = outlink->h;
for (i = 0; i < s->nb_planes; i++) {
out->data[i] += s->in_off_left[i];
}
break;
case INTERLEAVE_COLS_LR:
case INTERLEAVE_COLS_RL:
for (i = 0; i < s->nb_planes; i++) {
const int d = (s->in.format & 1) != (s->out.format & 1);
interleave_cols_to_any(s, out_off_right, i, iright, out, d);
}
break;
default:
for (i = 0; i < s->nb_planes; i++) {
av_image_copy_plane(out->data[i], out->linesize[i],
iright->data[i] + s->in_off_left[i],
iright->linesize[i] * s->in.row_step,
s->linesize[i], s->pheight[i]);
}
break;
}
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: {
if (s->in.format == INTERLEAVE_COLS_LR ||
s->in.format == INTERLEAVE_COLS_RL) {
const int d = (s->in.format & 1);
anaglyph_ic(out->data[0],
ileft ->data[0] + s->in_off_left [0] + d * 3,
iright->data[0] + s->in_off_right[0] + (!d) * 3,
out->linesize[0],
ileft->linesize[0] * s->in.row_step,
iright->linesize[0] * s->in.row_step,
s->out.width, s->out.height,
s->ana_matrix[0], s->ana_matrix[1], s->ana_matrix[2]);
} else {
ThreadData td;
td.ileft = ileft; td.iright = iright; td.out = out;
ff_filter_execute(ctx, filter_slice, &td, NULL,
FFMIN(s->out.height, ff_filter_get_nb_threads(ctx)));
}
break;
}
case CHECKERBOARD_RL:
case CHECKERBOARD_LR:
for (i = 0; i < s->nb_planes; i++) {
int x, y;
for (y = 0; y < s->pheight[i]; y++) {
uint8_t *dst = out->data[i] + out->linesize[i] * y;
const int d1 = (s->in.format == INTERLEAVE_COLS_LR || s->in.format == INTERLEAVE_COLS_RL) && (s->in.format & 1) != (s->out.format & 1);
const int d2 = (s->in.format == INTERLEAVE_COLS_LR || s->in.format == INTERLEAVE_COLS_RL) ? !d1 : 0;
const int m = 1 + (s->in.format == INTERLEAVE_COLS_LR || s->in.format == INTERLEAVE_COLS_RL);
uint8_t *left = ileft->data[i] + ileft->linesize[i] * y + s->in_off_left[i] + d1 * s->pixstep[i];
uint8_t *right = iright->data[i] + iright->linesize[i] * y + s->in_off_right[i] + d2 * s->pixstep[i];
int p, b;
if (s->out.format == CHECKERBOARD_RL && s->in.format != INTERLEAVE_COLS_LR && s->in.format != INTERLEAVE_COLS_RL)
FFSWAP(uint8_t*, left, right);
switch (s->pixstep[i]) {
case 1:
for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=2, p++, b+=2) {
dst[x ] = (b&1) == (y&1) ? left[p*m] : right[p*m];
dst[x+1] = (b&1) != (y&1) ? left[p*m] : right[p*m];
}
break;
case 2:
for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=4, p+=2, b+=2) {
AV_WN16(&dst[x ], (b&1) == (y&1) ? AV_RN16(&left[p*m]) : AV_RN16(&right[p*m]));
AV_WN16(&dst[x+2], (b&1) != (y&1) ? AV_RN16(&left[p*m]) : AV_RN16(&right[p*m]));
}
break;
case 3:
for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=6, p+=3, b+=2) {
AV_WB24(&dst[x ], (b&1) == (y&1) ? AV_RB24(&left[p*m]) : AV_RB24(&right[p*m]));
AV_WB24(&dst[x+3], (b&1) != (y&1) ? AV_RB24(&left[p*m]) : AV_RB24(&right[p*m]));
}
break;
case 4:
for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=8, p+=4, b+=2) {
AV_WN32(&dst[x ], (b&1) == (y&1) ? AV_RN32(&left[p*m]) : AV_RN32(&right[p*m]));
AV_WN32(&dst[x+4], (b&1) != (y&1) ? AV_RN32(&left[p*m]) : AV_RN32(&right[p*m]));
}
break;
case 6:
for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=12, p+=6, b+=2) {
AV_WB48(&dst[x ], (b&1) == (y&1) ? AV_RB48(&left[p*m]) : AV_RB48(&right[p*m]));
AV_WB48(&dst[x+6], (b&1) != (y&1) ? AV_RB48(&left[p*m]) : AV_RB48(&right[p*m]));
}
break;
case 8:
for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=16, p+=8, b+=2) {
AV_WN64(&dst[x ], (b&1) == (y&1) ? AV_RN64(&left[p*m]) : AV_RN64(&right[p*m]));
AV_WN64(&dst[x+8], (b&1) != (y&1) ? AV_RN64(&left[p*m]) : AV_RN64(&right[p*m]));
}
break;
}
}