Make VLC player support polarized 3D.让VLC播放器支持偏振3D效果。

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我是靠谱客的博主还单身往事，最近开发中收集的这篇文章主要介绍Make VLC player support polarized 3D.让VLC播放器支持偏振3D效果。，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

This is the initial patch for VLC player's polarized 3D support.

将这个patch应用到VLC播放器的源代码中，会多出一个--anaglyph-scheme polarized的3d模式，全屏幕播放视频时，可以支持偏振3D效果。

# use "./vlc
--anaglyph-scheme polarized" to start vlc then watch SBS 3d in fullscreen
# brought to you by Joyer(collger AT gmail.com)
diff --git a/modules/video_filter/anaglyph.c b/modules/video_filter/anaglyph.c
index 5e103d4..6968cda 100644
--- a/modules/video_filter/anaglyph.c
+++ b/modules/video_filter/anaglyph.c
@@ -24,7 +24,7 @@
#ifdef HAVE_CONFIG_H
#
include "config.h"
#endif
-
+#include <math.h>
#include <vlc_common.h>
#include <vlc_plugin.h>
@@ -35,6 +35,7 @@ static int Create(vlc_object_t *);
static void Destroy(vlc_object_t *);
static picture_t *Filter(filter_t *, picture_t *);
static void combine_side_by_side_yuv420(picture_t *, picture_t *, int, int);
+static void combine_side_by_side_yuv420_polarized(picture_t *, picture_t *);
#define SCHEME_TEXT N_("Color scheme")
#define SCHEME_LONGTEXT N_("Define the glasses' color scheme")
@@ -51,6 +52,7 @@ enum scheme_e
red_cyan,
trioscopic,
magenta_cyan,
+
polarized
};
static const char *const ppsz_scheme_values[] = {
@@ -59,6 +61,7 @@ static const char *const ppsz_scheme_values[] = {
"red-cyan",
"trioscopic",
"magenta-cyan",
+
"polarized"
};
static const char *const ppsz_scheme_descriptions[] = {
"pure red (left)
pure green (right)",
@@ -66,6 +69,7 @@ static const char *const ppsz_scheme_descriptions[] = {
"pure red (left)
pure cyan (right)",
"pure green (left)
pure magenta (right)",
"magenta (left)
cyan (right)",
+
"polarized lcd"
};
vlc_module_begin()
@@ -85,7 +89,7 @@ static const char *const ppsz_filter_options[] = {
struct filter_sys_t
{
-
int left, right;
+
int left, right, polarized;
};
@@ -116,6 +120,7 @@ static int Create(vlc_object_t *p_this)
char *psz_scheme = var_CreateGetStringCommand(p_filter,
FILTER_PREFIX "scheme");
+	p_sys->polarized = 0;
enum scheme_e scheme = red_cyan;
if (psz_scheme)
{
@@ -129,6 +134,8 @@ static int Create(vlc_object_t *p_this)
scheme = trioscopic;
else if (!strcmp(psz_scheme, "magenta-cyan"))
scheme = magenta_cyan;
+
else if (!strcmp(psz_scheme, "polarized"))
+
scheme = polarized;
else
msg_Err(p_filter, "Unknown anaglyph color scheme '%s'", psz_scheme);
}
@@ -156,6 +163,9 @@ static int Create(vlc_object_t *p_this)
p_sys->left = 0xff00ff;
p_sys->right = 0x00ffff;
break;
+
case polarized:
+
p_sys->polarized = 1;
+
break;
case unknown:
msg_Err(p_filter, "Oops");
break;
@@ -191,8 +201,12 @@ static picture_t *Filter(filter_t *p_filter, picture_t *p_pic)
case VLC_CODEC_I420:
case VLC_CODEC_J420:
case VLC_CODEC_YV12:
-
combine_side_by_side_yuv420(p_pic, p_outpic,
-
p_sys->left, p_sys->right);
+
if (p_sys->polarized) {
+
combine_side_by_side_yuv420_polarized(p_pic, p_outpic);
+
} else {
+
combine_side_by_side_yuv420(p_pic, p_outpic,
+
p_sys->left, p_sys->right);
+
}
break;
default:
@@ -205,6 +219,68 @@ static picture_t *Filter(filter_t *p_filter, picture_t *p_pic)
return CopyInfoAndRelease(p_outpic, p_pic);
}
+static int blend(int c1, int c2) {
+	return (int)sqrt((c1*c1 + c2*c2)/2);
+}
+
+static void combine_side_by_side_yuv420_polarized(picture_t *p_inpic,
+
picture_t *p_outpic)
+{
+
uint8_t *y1inl = p_inpic->p[Y_PLANE].p_pixels; /*input line left*/
+
uint8_t *uinl = p_inpic->p[U_PLANE].p_pixels;
+
uint8_t *vinl = p_inpic->p[V_PLANE].p_pixels;
+
+
uint8_t *y1out = p_outpic->p[Y_PLANE].p_pixels;
+
uint8_t *uout = p_outpic->p[U_PLANE].p_pixels;
+
uint8_t *vout = p_outpic->p[V_PLANE].p_pixels;
+
+
const int in_pitch = p_inpic->p[Y_PLANE].i_pitch;
+
const int out_pitch = p_outpic->p[Y_PLANE].i_pitch;
+
+
const int visible_pitch = p_inpic->p[Y_PLANE].i_visible_pitch;
+
const int visible_lines = p_inpic->p[Y_PLANE].i_visible_lines;
+
/*const int uv_visible_pitch = p_inpic->p[U_PLANE].i_visible_pitch;*/
+
+	int cnt,col;
+	int uinc = p_inpic->p[U_PLANE].i_pitch;
+	int vinc = p_inpic->p[V_PLANE].i_pitch;
+	int uoutc = p_outpic->p[U_PLANE].i_pitch;
+	int voutc = p_outpic->p[V_PLANE].i_pitch;
+	for (cnt=0;cnt<visible_lines / 2;cnt++) {
+
for(col=0; col<visible_pitch;col++) {
+
int halfw = visible_pitch / 2;
+
int left_idx = col/2;
+
int right_idx = left_idx + halfw;
+
y1out[col] = blend(y1inl[left_idx], y1inl[left_idx + in_pitch]);
+
y1out[col + out_pitch] = blend(y1inl[right_idx], y1inl[right_idx + in_pitch]);
+
}
+
y1inl += in_pitch * 2;
+
y1out += out_pitch * 2;
+	}
+
+	for (cnt=0;cnt<p_inpic->p[U_PLANE].i_visible_lines / 2;cnt++) {
+
for(col=0; col<uinc;col++) {
+
int halfw = uinc / 2;
+
int left_idx = col/2;
+
int right_idx = left_idx + halfw;
+
uout[col] = blend(uinl[left_idx], uinl[left_idx + uinc]);
+
uout[col + uoutc] = blend(uinl[right_idx], uinl[right_idx + uinc]);
+
}
+
+
for(col=0; col<vinc;col++) {
+
int halfw = vinc / 2;
+
int left_idx = col/2;
+
int right_idx = left_idx + halfw;
+
vout[col] = blend(vinl[left_idx], vinl[left_idx + vinc]);
+
vout[col + voutc] = blend(vinl[right_idx], vinl[right_idx + vinc]);
+
}
+
+
uinl += uinc * 2;
+
vinl += vinc * 2;
+
uout += uinc * 2;
+
vout += vinc * 2;
+	}
+}
static void combine_side_by_side_yuv420(picture_t *p_inpic, picture_t *p_outpic,
int left, int right)