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avfilter/vf_stereo3d: add checkerboard output format

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2015-09-03 11:49:59 +00:00
parent b821aed706
commit 09812e1200
2 changed files with 70 additions and 1 deletions
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6
doc/filters.texi
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@ -9891,6 +9891,12 @@ mono output (left eye only)
@item mr
mono output (right eye only)
@item chl
checkerboard, left eye first
@item chr
checkerboard, right eye first
@end table
Default value is @samp{arcd}.

65
libavfilter/vf_stereo3d.c
View File

@ -1,6 +1,6 @@
/*
* Copyright (c) 2010 Gordon Schmidt <gordon.schmidt <at> s2000.tu-chemnitz.de>
* Copyright (c) 2013 Paul B Mahol
* Copyright (c) 2013-2015 Paul B Mahol
*
* This file is part of FFmpeg.
*
@ -21,6 +21,7 @@
#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
@ -59,6 +60,8 @@ enum StereoCode {
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)
STEREO_CODE_COUNT // TODO: needs autodetection
};
@ -189,6 +192,8 @@ static const AVOption stereo3d_options[] = {
{ "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" },
{ "chl", "checkerboard left first", 0, AV_OPT_TYPE_CONST, {.i64=CHECKERBOARD_LR}, 0, 0, FLAGS, "out" },
{ "chr", "checkerboard right first", 0, AV_OPT_TYPE_CONST, {.i64=CHECKERBOARD_RL}, 0, 0, FLAGS, "out" },
{ NULL }
};
@ -451,6 +456,10 @@ static int config_output(AVFilterLink *outlink)
fps.num *= 2;
tb.den *= 2;
break;
case CHECKERBOARD_LR:
case CHECKERBOARD_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);
@ -633,6 +642,60 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
FFMIN(s->out.height, ctx->graph->nb_threads));
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;
uint8_t *left = ileft->data[i] + ileft->linesize[i] * y + s->in_off_left[i];
uint8_t *right = iright->data[i] + iright->linesize[i] * y + s->in_off_right[i];
int p, b;
if (s->out.format == CHECKERBOARD_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++) {
dst[x ] = (b&1) == (y&1) ? left[p] : right[p];
dst[x+1] = (b&1) != (y&1) ? left[p] : right[p];
}
break;
case 2:
for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=4, p+=2, b++) {
AV_WN16(&dst[x ], (b&1) == (y&1) ? AV_RN16(&left[p]) : AV_RN16(&right[p]));
AV_WN16(&dst[x+2], (b&1) != (y&1) ? AV_RN16(&left[p]) : AV_RN16(&right[p]));
}
break;
case 3:
for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=6, p+=3, b++) {
AV_WB24(&dst[x ], (b&1) == (y&1) ? AV_RB24(&left[p]) : AV_RB24(&right[p]));
AV_WB24(&dst[x+3], (b&1) != (y&1) ? AV_RB24(&left[p]) : AV_RB24(&right[p]));
}
break;
case 4:
for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=8, p+=4, b++) {
AV_WN32(&dst[x ], (b&1) == (y&1) ? AV_RN32(&left[p]) : AV_RN32(&right[p]));
AV_WN32(&dst[x+4], (b&1) != (y&1) ? AV_RN32(&left[p]) : AV_RN32(&right[p]));
}
break;
case 6:
for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=12, p+=6, b++) {
AV_WB48(&dst[x ], (b&1) == (y&1) ? AV_RB48(&left[p]) : AV_RB48(&right[p]));
AV_WB48(&dst[x+6], (b&1) != (y&1) ? AV_RB48(&left[p]) : AV_RB48(&right[p]));
}
break;
case 8:
for (x = 0, b = 0, p = 0; x < s->linesize[i] * 2; x+=16, p+=8, b++) {
AV_WN64(&dst[x ], (b&1) == (y&1) ? AV_RN64(&left[p]) : AV_RN64(&right[p]));
AV_WN64(&dst[x+8], (b&1) != (y&1) ? AV_RN64(&left[p]) : AV_RN64(&right[p]));
}
break;
}
}
}
break;
default:
av_assert0(0);
}