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dvbsuboverlay: remove unnecessary RGB -> YUV conversion by using YUV palettes

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the default CLUTs still use RGB -> YUV conversions since the standard defines
them as RGBA values.
This commit is contained in:
Janne Grunau 2011-01-03 20:05:52 +01:00 committed by Tim-Philipp Müller
parent f63a67ebfb
commit 994156c1b8
2 changed files with 75 additions and 137 deletions
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86
gst/dvbsuboverlay/dvb-sub.c
View file

@ -33,7 +33,6 @@
#include <string.h> /* memset */
#include <gst/gstutils.h> /* GST_READ_UINT16_BE */
#include <gst/base/gstbitreader.h> /* GstBitReader */
#include "ffmpeg-colorspace.h" /* YUV_TO_RGB1_CCIR */ /* FIXME: Just give YUV data to gstreamer then? */
#include "dvb-sub.h"
@ -55,13 +54,10 @@ static void dvb_sub_init (void);
*/
#define MAX_NEG_CROP 1024
static guint8 ff_cropTbl[256 + 2 * MAX_NEG_CROP] = { 0, };
#define cm (ff_cropTbl + MAX_NEG_CROP)
#define AYUV(y,u,v,a) (((a) << 24) | ((y) << 16) | ((u) << 8) | (v))
#define RGBA_TO_AYUV(r,g,b,a) (((a) << 24) | ((rgb_to_y(r,g,b)) << 16) | ((rgb_to_u(r,g,b)) << 8) | (rgb_to_v(r,g,b)))
/* FIXME: This is really ARGB... We might need this configurable for performant
* FIXME: use in GStreamer as well if that likes RGBA more (Qt prefers ARGB) */
#define RGBA(r,g,b,a) (((a) << 24) | ((r) << 16) | ((g) << 8) | (b))
typedef struct DVBSubCLUT
{
@ -156,6 +152,40 @@ typedef enum
BOTTOM_FIELD = 1
} DvbSubPixelDataSubBlockFieldType;
static inline gint
rgb_to_y (gint r, gint g, gint b)
{
gint ret;
ret = (gint) (((19595 * r) >> 16) + ((38470 * g) >> 16) + ((7471 * b) >> 16));
ret = CLAMP (ret, 0, 255);
return ret;
}
static inline gint
rgb_to_u (gint r, gint g, gint b)
{
gint ret;
ret =
(gint) (-((11059 * r) >> 16) - ((21709 * g) >> 16) + ((32768 * b) >> 16) +
128);
ret = CLAMP (ret, 0, 255);
return ret;
}
static inline gint
rgb_to_v (gint r, gint g, gint b)
{
gint ret;
ret =
(gint) (((32768 * r) >> 16) - ((27439 * g) >> 16) - ((5329 * b) >> 16) +
128);
ret = CLAMP (ret, 0, 255);
return ret;
}
static DVBSubObject *
get_object (DvbSub * dvb_sub, guint16 object_id)
{
@ -263,20 +293,6 @@ delete_state (DvbSub * dvb_sub)
g_warn_if_fail (dvb_sub->object_list == NULL);
}
/* init static data necessary for ffmpeg-colorspace conversion */
static void
dsputil_static_init (void)
{
int i;
for (i = 0; i < 256; i++)
ff_cropTbl[i + MAX_NEG_CROP] = i;
for (i = 0; i < MAX_NEG_CROP; i++) {
ff_cropTbl[i] = 0;
ff_cropTbl[i + MAX_NEG_CROP + 256] = 255;
}
}
static void
dvb_sub_init (void)
{
@ -284,19 +300,17 @@ dvb_sub_init (void)
GST_DEBUG_CATEGORY_INIT (dvbsub_debug, "dvbsub", 0, "dvbsuboverlay parser");
dsputil_static_init (); /* Initializes ff_cropTbl table, used in YUV_TO_RGB conversion */
/* Initialize the static default_clut structure, from which other clut
* structures are initialized from (to start off with default CLUTs
* as defined in the specification). */
default_clut.id = -1;
default_clut.clut4[0] = RGBA (0, 0, 0, 0);
default_clut.clut4[1] = RGBA (255, 255, 255, 255);
default_clut.clut4[2] = RGBA (0, 0, 0, 255);
default_clut.clut4[3] = RGBA (127, 127, 127, 255);
default_clut.clut4[0] = RGBA_TO_AYUV (0, 0, 0, 0);
default_clut.clut4[1] = RGBA_TO_AYUV (255, 255, 255, 255);
default_clut.clut4[2] = RGBA_TO_AYUV (0, 0, 0, 255);
default_clut.clut4[3] = RGBA_TO_AYUV (127, 127, 127, 255);
default_clut.clut16[0] = RGBA (0, 0, 0, 0);
default_clut.clut16[0] = RGBA_TO_AYUV (0, 0, 0, 0);
for (i = 1; i < 16; i++) {
if (i < 8) {
r = (i & 1) ? 255 : 0;
@ -307,10 +321,10 @@ dvb_sub_init (void)
g = (i & 2) ? 127 : 0;
b = (i & 4) ? 127 : 0;
}
default_clut.clut16[i] = RGBA (r, g, b, 255);
default_clut.clut16[i] = RGBA_TO_AYUV (r, g, b, 255);
}
default_clut.clut256[0] = RGBA (0, 0, 0, 0);
default_clut.clut256[0] = RGBA_TO_AYUV (0, 0, 0, 0);
for (i = 1; i < 256; i++) {
if (i < 8) {
r = (i & 1) ? 255 : 0;
@ -345,7 +359,7 @@ dvb_sub_init (void)
break;
}
}
default_clut.clut256[i] = RGBA (r, g, b, a);
default_clut.clut256[i] = RGBA_TO_AYUV (r, g, b, a);
}
}
@ -564,7 +578,6 @@ _dvb_sub_parse_clut_segment (DvbSub * dvb_sub, guint16 page_id, guint8 * buf,
DVBSubCLUT *clut;
int entry_id, depth, full_range;
int y, cr, cb, alpha;
int r, g, b, r_add, g_add, b_add;
GST_MEMDUMP ("DVB clut packet", buf, buf_size);
@ -613,18 +626,15 @@ _dvb_sub_parse_clut_segment (DvbSub * dvb_sub, guint16 page_id, guint8 * buf,
if (y == 0)
alpha = 0xff;
YUV_TO_RGB1_CCIR (cb, cr);
YUV_TO_RGB2_CCIR (r, g, b, y);
GST_DEBUG ("CLUT DEFINITION: clut %d := (%d,%d,%d,%d)", entry_id, r, g, b,
GST_DEBUG ("CLUT DEFINITION: clut %d := (%d,%d,%d,%d)", entry_id, y, cb, cr,
alpha);
if (depth & 0x80)
clut->clut4[entry_id] = RGBA (r, g, b, 255 - alpha);
clut->clut4[entry_id] = AYUV (y, cb, cr, 255 - alpha);
if (depth & 0x40)
clut->clut16[entry_id] = RGBA (r, g, b, 255 - alpha);
clut->clut16[entry_id] = AYUV (y, cb, cr, 255 - alpha);
if (depth & 0x20)
clut->clut256[entry_id] = RGBA (r, g, b, 255 - alpha);
clut->clut256[entry_id] = AYUV (y, cb, cr, 255 - alpha);
}
}

126
gst/dvbsuboverlay/gstdvbsuboverlay.c
View file

@ -423,47 +423,11 @@ gst_dvbsub_overlay_getcaps (GstPad * pad)
return caps;
}
static inline gint
rgb_to_y (gint r, gint g, gint b)
{
gint ret;
ret = (gint) (((19595 * r) >> 16) + ((38470 * g) >> 16) + ((7471 * b) >> 16));
ret = CLAMP (ret, 0, 255);
return ret;
}
static inline gint
rgb_to_u (gint r, gint g, gint b)
{
gint ret;
ret =
(gint) (-((11059 * r) >> 16) - ((21709 * g) >> 16) + ((32768 * b) >> 16) +
128);
ret = CLAMP (ret, 0, 255);
return ret;
}
static inline gint
rgb_to_v (gint r, gint g, gint b)
{
gint ret;
ret =
(gint) (((32768 * r) >> 16) - ((27439 * g) >> 16) - ((5329 * b) >> 16) +
128);
ret = CLAMP (ret, 0, 255);
return ret;
}
/* FIXME: DVB-SUB actually provides us AYUV from CLUT, but libdvbsub used to convert it to ARGB */
static void
blit_i420 (GstDVBSubOverlay * overlay, DVBSubtitles * subs, GstBuffer * buffer)
{
guint counter;
DVBSubtitleRect *sub_region;
gint r, g, b;
gint a1, a2, a3, a4;
gint y1, y2, y3, y4;
gint u1, u2, u3, u4;
@ -574,49 +538,33 @@ blit_i420 (GstDVBSubOverlay * overlay, DVBSubtitles * subs, GstBuffer * buffer)
color =
sub_region->pict.palette[src[(sy >> 16) * src_stride + (sx >> 16)]];
a1 = (color >> 24) & 0xff;
r = (color >> 16) & 0xff;
g = (color >> 8) & 0xff;
b = color & 0xff;
y1 = rgb_to_y (r, g, b);
u1 = rgb_to_u (r, g, b);
v1 = rgb_to_v (r, g, b);
y1 = (color >> 16) & 0xff;
u1 = (color >> 8) & 0xff;
v1 = color & 0xff;
color =
sub_region->pict.palette[src[(sy >> 16) * src_stride + ((sx +
xstep) >> 16)]];
a2 = (color >> 24) & 0xff;
r = (color >> 16) & 0xff;
g = (color >> 8) & 0xff;
b = color & 0xff;
y2 = rgb_to_y (r, g, b);
u2 = rgb_to_u (r, g, b);
v2 = rgb_to_v (r, g, b);
y2 = (color >> 16) & 0xff;
u2 = (color >> 8) & 0xff;
v2 = color & 0xff;
color =
sub_region->pict.palette[src[((sy + ystep) >> 16) * src_stride +
(sx >> 16)]];
a3 = (color >> 24) & 0xff;
r = (color >> 16) & 0xff;
g = (color >> 8) & 0xff;
b = color & 0xff;
y3 = rgb_to_y (r, g, b);
u3 = rgb_to_u (r, g, b);
v3 = rgb_to_v (r, g, b);
y3 = (color >> 16) & 0xff;
u3 = (color >> 8) & 0xff;
v3 = color & 0xff;
color =
sub_region->pict.palette[src[((sy + ystep) >> 16) * src_stride +
((sx + xstep) >> 16)]];
a4 = (color >> 24) & 0xff;
r = (color >> 16) & 0xff;
g = (color >> 8) & 0xff;
b = color & 0xff;
y4 = rgb_to_y (r, g, b);
u4 = rgb_to_u (r, g, b);
v4 = rgb_to_v (r, g, b);
y4 = (color >> 16) & 0xff;
u4 = (color >> 8) & 0xff;
v4 = color & 0xff;
dst_y[0] = (a1 * y1 + (255 - a1) * dst_y[0]) / 255;
dst_y[1] = (a2 * y2 + (255 - a2) * dst_y[1]) / 255;
@ -641,25 +589,17 @@ blit_i420 (GstDVBSubOverlay * overlay, DVBSubtitles * subs, GstBuffer * buffer)
color =
sub_region->pict.palette[src[(sy >> 16) * src_stride + (sx >> 16)]];
a1 = (color >> 24) & 0xff;
r = (color >> 16) & 0xff;
g = (color >> 8) & 0xff;
b = color & 0xff;
y1 = rgb_to_y (r, g, b);
u1 = rgb_to_u (r, g, b);
v1 = rgb_to_v (r, g, b);
y1 = (color >> 16) & 0xff;
u1 = (color >> 8) & 0xff;
v1 = color & 0xff;
color =
sub_region->pict.palette[src[((sy + ystep) >> 16) * src_stride +
(sx >> 16)]];
a3 = (color >> 24) & 0xff;
r = (color >> 16) & 0xff;
g = (color >> 8) & 0xff;
b = color & 0xff;
y3 = rgb_to_y (r, g, b);
u3 = rgb_to_u (r, g, b);
v3 = rgb_to_v (r, g, b);
y3 = (color >> 16) & 0xff;
u3 = (color >> 8) & 0xff;
v3 = color & 0xff;
dst_y[0] = (a1 * y1 + (255 - a1) * dst_y[0]) / 255;
dst_y2[0] = (a3 * y3 + (255 - a3) * dst_y2[0]) / 255;
@ -690,25 +630,17 @@ blit_i420 (GstDVBSubOverlay * overlay, DVBSubtitles * subs, GstBuffer * buffer)
color =
sub_region->pict.palette[src[(sy >> 16) * src_stride + (sx >> 16)]];
a1 = (color >> 24) & 0xff;
r = (color >> 16) & 0xff;
g = (color >> 8) & 0xff;
b = color & 0xff;
y1 = rgb_to_y (r, g, b);
u1 = rgb_to_u (r, g, b);
v1 = rgb_to_v (r, g, b);
y1 = (color >> 16) & 0xff;
u1 = (color >> 8) & 0xff;
v1 = color & 0xff;
color =
sub_region->pict.palette[src[(sy >> 16) * src_stride + ((sx +
xstep) >> 16)]];
a2 = (color >> 24) & 0xff;
r = (color >> 16) & 0xff;
g = (color >> 8) & 0xff;
b = color & 0xff;
y2 = rgb_to_y (r, g, b);
u2 = rgb_to_u (r, g, b);
v2 = rgb_to_v (r, g, b);
y2 = (color >> 16) & 0xff;
u2 = (color >> 8) & 0xff;
v2 = color & 0xff;
dst_y[0] = (a1 * y1 + (255 - a1) * dst_y[0]) / 255;
dst_y[1] = (a2 * y2 + (255 - a2) * dst_y[1]) / 255;
@ -728,13 +660,9 @@ blit_i420 (GstDVBSubOverlay * overlay, DVBSubtitles * subs, GstBuffer * buffer)
color =
sub_region->pict.palette[src[(sy >> 16) * src_stride + (sx >> 16)]];
a1 = (color >> 24) & 0xff;
r = (color >> 16) & 0xff;
g = (color >> 8) & 0xff;
b = color & 0xff;
y1 = rgb_to_y (r, g, b);
u1 = rgb_to_u (r, g, b);
v1 = rgb_to_v (r, g, b);
y1 = (color >> 16) & 0xff;
u1 = (color >> 8) & 0xff;
v1 = color & 0xff;
dst_y[0] = (a1 * y1 + (255 - a1) * dst_y[0]) / 255;