mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-27 04:01:08 +00:00
202c3bc4b1
4x downscaling of chroma with co-sited chroma has never worked it seems. Fixes incorrect videotestsrc output and videoconvert conversions to Y41B, YUV9, YVU9 and IYU9 with co-sited chroma. e.g. gst-launch-1.0 videotestsrc ! video/x-raw,format=Y41B,width=1280,height=720 ! \ videoconvert ! autovideosink Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2789>
1161 lines
47 KiB
C
1161 lines
47 KiB
C
/* GStreamer
|
|
* Copyright (C) 2013 Wim Taymans <wim.taymans@gmail.com>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
|
|
#include "video-orc.h"
|
|
#include "video-format.h"
|
|
#include <gst/video/video-enumtypes.h>
|
|
|
|
/**
|
|
* SECTION:gstvideochroma
|
|
* @title: GstVideoChromaResample
|
|
* @short_description: Functions and utility object for operating on chroma video planes
|
|
*
|
|
* The functions gst_video_chroma_from_string() and gst_video_chroma_to_string() convert
|
|
* between #GstVideoChromaSite and string descriptions.
|
|
*
|
|
* #GstVideoChromaResample is a utility object for resampling chroma planes
|
|
* and converting between different chroma sampling sitings.
|
|
*
|
|
*/
|
|
|
|
#ifndef GST_DISABLE_GST_DEBUG
|
|
#define GST_CAT_DEFAULT ensure_debug_category()
|
|
static GstDebugCategory *
|
|
ensure_debug_category (void)
|
|
{
|
|
static gsize cat_gonce = 0;
|
|
|
|
if (g_once_init_enter (&cat_gonce)) {
|
|
gsize cat_done;
|
|
|
|
cat_done = (gsize) _gst_debug_category_new ("video-chroma", 0,
|
|
"video-chroma object");
|
|
|
|
g_once_init_leave (&cat_gonce, cat_done);
|
|
}
|
|
|
|
return (GstDebugCategory *) cat_gonce;
|
|
}
|
|
#else
|
|
#define ensure_debug_category() /* NOOP */
|
|
#endif /* GST_DISABLE_GST_DEBUG */
|
|
|
|
typedef struct
|
|
{
|
|
const gchar *name;
|
|
GstVideoChromaSite site;
|
|
} ChromaSiteInfo;
|
|
|
|
static const ChromaSiteInfo chromasite[] = {
|
|
{"jpeg", GST_VIDEO_CHROMA_SITE_JPEG},
|
|
{"mpeg2", GST_VIDEO_CHROMA_SITE_MPEG2},
|
|
{"dv", GST_VIDEO_CHROMA_SITE_DV},
|
|
{"alt-line", GST_VIDEO_CHROMA_SITE_ALT_LINE},
|
|
{"cosited", GST_VIDEO_CHROMA_SITE_COSITED},
|
|
};
|
|
|
|
/**
|
|
* gst_video_chroma_from_string:
|
|
* @s: a chromasite string
|
|
*
|
|
* Convert @s to a #GstVideoChromaSite
|
|
*
|
|
* Deprecated: 1.20: Use gst_video_chroma_site_from_string() instead.
|
|
*
|
|
* Returns: a #GstVideoChromaSite or %GST_VIDEO_CHROMA_SITE_UNKNOWN when @s does
|
|
* not contain a valid chroma description.
|
|
*/
|
|
GstVideoChromaSite
|
|
gst_video_chroma_from_string (const gchar * s)
|
|
{
|
|
return gst_video_chroma_site_from_string (s);
|
|
}
|
|
|
|
/**
|
|
* gst_video_chroma_site_from_string:
|
|
* @s: a chromasite string
|
|
*
|
|
* Convert @s to a #GstVideoChromaSite
|
|
*
|
|
* Returns: a #GstVideoChromaSite or %GST_VIDEO_CHROMA_SITE_UNKNOWN when @s does
|
|
* not contain a valid chroma-site description.
|
|
*
|
|
* Since: 1.20
|
|
*/
|
|
GstVideoChromaSite
|
|
gst_video_chroma_site_from_string (const gchar * s)
|
|
{
|
|
gint i;
|
|
gchar **split;
|
|
gchar **iter;
|
|
GstVideoChromaSite ret = GST_VIDEO_CHROMA_SITE_UNKNOWN;
|
|
GFlagsClass *klass;
|
|
|
|
for (i = 0; i < G_N_ELEMENTS (chromasite); i++) {
|
|
if (g_str_equal (chromasite[i].name, s))
|
|
return chromasite[i].site;
|
|
}
|
|
|
|
klass = (GFlagsClass *) g_type_class_ref (GST_TYPE_VIDEO_CHROMA_SITE);
|
|
split = g_strsplit (s, "+", 0);
|
|
for (iter = split; *iter; iter++) {
|
|
GFlagsValue *value;
|
|
|
|
value = g_flags_get_value_by_nick (klass, *iter);
|
|
if (!value) {
|
|
ret = GST_VIDEO_CHROMA_SITE_UNKNOWN;
|
|
goto out;
|
|
}
|
|
|
|
ret |= value->value;
|
|
}
|
|
|
|
out:
|
|
g_type_class_unref (klass);
|
|
g_strfreev (split);
|
|
|
|
/* Doesn't make sense */
|
|
if ((ret & GST_VIDEO_CHROMA_SITE_NONE) != 0 &&
|
|
ret != GST_VIDEO_CHROMA_SITE_NONE)
|
|
return GST_VIDEO_CHROMA_SITE_UNKNOWN;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* gst_video_chroma_to_string:
|
|
* @site: a #GstVideoChromaSite
|
|
*
|
|
* Converts @site to its string representation.
|
|
*
|
|
* Deprecated: 1.20: Use gst_video_chroma_site_to_string() instead.
|
|
*
|
|
* Returns: a string describing @site.
|
|
*/
|
|
const gchar *
|
|
gst_video_chroma_to_string (GstVideoChromaSite site)
|
|
{
|
|
gint i;
|
|
for (i = 0; i < G_N_ELEMENTS (chromasite); i++) {
|
|
if (chromasite[i].site == site)
|
|
return chromasite[i].name;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* gst_video_chroma_site_to_string:
|
|
* @site: a #GstVideoChromaSite
|
|
*
|
|
* Converts @site to its string representation.
|
|
*
|
|
* Returns: (transfer full) (nullable): a string representation of @site
|
|
* or %NULL if @site contains undefined value or
|
|
* is equal to %GST_VIDEO_CHROMA_SITE_UNKNOWN
|
|
*
|
|
* Since: 1.20
|
|
*/
|
|
gchar *
|
|
gst_video_chroma_site_to_string (GstVideoChromaSite site)
|
|
{
|
|
gint i;
|
|
GString *str;
|
|
GFlagsValue *value;
|
|
GFlagsClass *klass;
|
|
|
|
/* return null string for GST_VIDEO_CHROMA_SITE_UNKNOWN */
|
|
if (site == 0)
|
|
return NULL;
|
|
|
|
for (i = 0; i < G_N_ELEMENTS (chromasite); i++) {
|
|
if (chromasite[i].site == site)
|
|
return g_strdup (chromasite[i].name);
|
|
}
|
|
|
|
/* Doesn't make sense */
|
|
if ((site & GST_VIDEO_CHROMA_SITE_NONE) != 0 &&
|
|
site != GST_VIDEO_CHROMA_SITE_NONE)
|
|
return NULL;
|
|
|
|
/* Construct new string */
|
|
klass = (GFlagsClass *) g_type_class_ref (GST_TYPE_VIDEO_CHROMA_SITE);
|
|
str = g_string_new (NULL);
|
|
while (site != GST_VIDEO_CHROMA_SITE_UNKNOWN &&
|
|
(value = g_flags_get_first_value (klass, site))) {
|
|
if (str->len > 0)
|
|
g_string_append (str, "+");
|
|
|
|
g_string_append (str, value->value_nick);
|
|
site &= ~value->value;
|
|
}
|
|
g_type_class_unref (klass);
|
|
|
|
/* This means given chroma-site has unknown value */
|
|
if (site != 0)
|
|
return g_string_free (str, TRUE);
|
|
|
|
return g_string_free (str, FALSE);
|
|
}
|
|
|
|
struct _GstVideoChromaResample
|
|
{
|
|
GstVideoChromaMethod method;
|
|
GstVideoChromaSite site;
|
|
GstVideoChromaFlags flags;
|
|
GstVideoFormat format;
|
|
gint h_factor, v_factor;
|
|
guint n_lines;
|
|
gint offset;
|
|
void (*h_resample) (GstVideoChromaResample * resample, gpointer pixels,
|
|
gint width);
|
|
void (*v_resample) (GstVideoChromaResample * resample, gpointer lines[],
|
|
gint width);
|
|
};
|
|
|
|
#define PR(i) (p[2 + 4 * (i)])
|
|
#define PB(i) (p[3 + 4 * (i)])
|
|
|
|
#define PR0(i) (l0[2 + 4 * (i)])
|
|
#define PR1(i) (l1[2 + 4 * (i)])
|
|
#define PR2(i) (l2[2 + 4 * (i)])
|
|
#define PR3(i) (l3[2 + 4 * (i)])
|
|
#define PB0(i) (l0[3 + 4 * (i)])
|
|
#define PB1(i) (l1[3 + 4 * (i)])
|
|
#define PB2(i) (l2[3 + 4 * (i)])
|
|
#define PB3(i) (l3[3 + 4 * (i)])
|
|
|
|
#define FILT_1_1(a,b) ((a) + (b) + 1) >> 1
|
|
#define FILT_1_3_3_1(a,b,c,d) ((a) + 3*((b)+(c)) + (d) + 4) >> 3
|
|
|
|
#define FILT_3_1(a,b) (3*(a) + (b) + 2) >> 2
|
|
#define FILT_1_3(a,b) ((a) + 3*(b) + 2) >> 2
|
|
#define FILT_1_2_1(a,b,c) ((a) + 2*(b) + (c) + 2) >> 2
|
|
|
|
#define FILT_7_1(a,b) (7*(a) + 1*(b) + 4) >> 3
|
|
#define FILT_1_7(a,b) (1*(a) + 7*(b) + 4) >> 3
|
|
|
|
#define FILT_5_3(a,b) (5*(a) + 3*(b) + 4) >> 3
|
|
#define FILT_3_5(a,b) (3*(a) + 5*(b) + 4) >> 3
|
|
|
|
#define FILT_10_3_2_1(a,b,c,d) (10*(a) + 3*(b) + 2*(c) + (d) + 8) >> 4
|
|
#define FILT_1_2_3_10(a,b,c,d) ((a) + 2*(b) + 3*(c) + 10*(d) + 8) >> 4
|
|
#define FILT_1_2_3_4_3_2_1(a,b,c,d,e,f,g) ((a) + 2*((b)+(f)) + 3*((c)+(e)) + 4*(d) + (g) + 8) >> 4
|
|
|
|
/* 2x horizontal upsampling without cositing
|
|
*
|
|
* +---------- a
|
|
* | +------ (3*a + b + 2) >> 2
|
|
* | | +---- ( a + 3*b + 2) >> 2
|
|
* v v v
|
|
* O-O-O-O-
|
|
* x x
|
|
* a b
|
|
*/
|
|
#define MAKE_UPSAMPLE_H2(name,type) \
|
|
static void \
|
|
video_chroma_up_h2_##name (GstVideoChromaResample *resample, \
|
|
gpointer pixels, gint width) \
|
|
{ \
|
|
type *p = pixels; \
|
|
gint i; \
|
|
type tr0, tr1; \
|
|
type tb0, tb1; \
|
|
\
|
|
tr1 = PR(0); \
|
|
tb1 = PB(0); \
|
|
for (i = 1; i < width - 1; i += 2) { \
|
|
tr0 = tr1, tr1 = PR(i+1); \
|
|
tb0 = tb1, tb1 = PB(i+1); \
|
|
\
|
|
PR(i) = FILT_3_1 (tr0, tr1); \
|
|
PB(i) = FILT_3_1 (tb0, tb1); \
|
|
PR(i+1) = FILT_1_3 (tr0, tr1); \
|
|
PB(i+1) = FILT_1_3 (tb0, tb1); \
|
|
} \
|
|
}
|
|
|
|
/* 2x vertical upsampling without cositing
|
|
*
|
|
* O--O--O- <---- a
|
|
* a x x x
|
|
* O--O--O- <---- (3*a + b + 2) >> 2
|
|
* O--O--O- <-----( a + 3*b + 2) >> 2
|
|
* b x x x
|
|
* O--O--O- <---- b
|
|
*/
|
|
#define MAKE_UPSAMPLE_V2(name,type) \
|
|
static void \
|
|
video_chroma_up_v2_##name (GstVideoChromaResample *resample, \
|
|
gpointer lines[], gint width) \
|
|
{ \
|
|
type *l0 = lines[0]; \
|
|
type *l1 = lines[1]; \
|
|
\
|
|
if (resample->h_resample) { \
|
|
resample->h_resample (resample, l0, width); \
|
|
if (l0 != l1) \
|
|
resample->h_resample (resample, l1, width); \
|
|
} \
|
|
if (l0 != l1) { \
|
|
type *d0 = l0; \
|
|
type *d1 = l1; \
|
|
video_orc_chroma_up_v2_##name (d0, d1, l0, l1, width); \
|
|
} \
|
|
}
|
|
/* 2x vertical upsampling interlaced without cositing
|
|
*
|
|
* even odd
|
|
*
|
|
* O--O--O--------------- <--- a
|
|
* a x x x
|
|
* --------------O--O--O- <--- c
|
|
* O--O--O--------------- <--- (5*a + 3*b + 4) >> 3
|
|
* c x x x
|
|
* --------------O--O--O- <--- (7*c + d + 4) >> 3
|
|
* O--O--O--------------- <--- ( a + 7*b + 4) >> 3
|
|
* b x x x
|
|
* --------------O--O--O- <--- (3*c + 5*d + 4) >> 3
|
|
* O--O--O---------------
|
|
* d x x x
|
|
* --------------O--O--O-
|
|
*/
|
|
#define MAKE_UPSAMPLE_VI2(name,type) \
|
|
static void \
|
|
video_chroma_up_vi2_##name (GstVideoChromaResample *resample, \
|
|
gpointer lines[], gint width) \
|
|
{ \
|
|
gint i; \
|
|
type *l0 = lines[0]; \
|
|
type *l1 = lines[1]; \
|
|
type *l2 = lines[2]; \
|
|
type *l3 = lines[3]; \
|
|
type tr0, tr1, tr2, tr3; \
|
|
type tb0, tb1, tb2, tb3; \
|
|
\
|
|
if (resample->h_resample) { \
|
|
if (l0 != l1) { \
|
|
resample->h_resample (resample, l0, width); \
|
|
resample->h_resample (resample, l1, width); \
|
|
} \
|
|
if (l2 != l3) { \
|
|
resample->h_resample (resample, l2, width); \
|
|
resample->h_resample (resample, l3, width); \
|
|
} \
|
|
} \
|
|
if (l0 != l1 && l2 != l3) { \
|
|
for (i = 0; i < width; i++) { \
|
|
tr0 = PR0(i), tr2 = PR2(i); \
|
|
tb0 = PB0(i), tb2 = PB2(i); \
|
|
tr1 = PR1(i), tr3 = PR3(i); \
|
|
tb1 = PB1(i), tb3 = PB3(i); \
|
|
\
|
|
PR0(i) = FILT_5_3 (tr0, tr2); \
|
|
PB0(i) = FILT_5_3 (tb0, tb2); \
|
|
PR1(i) = FILT_7_1 (tr1, tr3); \
|
|
PB1(i) = FILT_7_1 (tb1, tb3); \
|
|
PR2(i) = FILT_1_7 (tr0, tr2); \
|
|
PB2(i) = FILT_1_7 (tb0, tb2); \
|
|
PR3(i) = FILT_3_5 (tr1, tr3); \
|
|
PB3(i) = FILT_3_5 (tb1, tb3); \
|
|
} \
|
|
} \
|
|
}
|
|
|
|
/* 2x horizontal downsampling without cositing
|
|
*
|
|
* +------ (a + b+ 1) >> 1
|
|
* |
|
|
* v
|
|
* -O---O--
|
|
* x x x x
|
|
* a b c d
|
|
*/
|
|
#define MAKE_DOWNSAMPLE_H2_ORC(name,type) \
|
|
static void \
|
|
video_chroma_down_h2_##name (GstVideoChromaResample *resample, \
|
|
gpointer pixels, gint width) \
|
|
{ \
|
|
type *p = pixels; \
|
|
type *d = p; \
|
|
\
|
|
video_orc_chroma_down_h2_##name (d, p, width / 2); \
|
|
}
|
|
|
|
#define MAKE_DOWNSAMPLE_H2(name,type) \
|
|
static void \
|
|
video_chroma_down_h2_##name (GstVideoChromaResample *resample, \
|
|
gpointer pixels, gint width) \
|
|
{ \
|
|
type *p = pixels; \
|
|
gint i; \
|
|
\
|
|
for (i = 0; i < width - 1; i += 2) { \
|
|
type tr0 = PR(i), tr1 = PR(i+1); \
|
|
type tb0 = PB(i), tb1 = PB(i+1); \
|
|
\
|
|
PR(i) = FILT_1_1 (tr0, tr1); \
|
|
PB(i) = FILT_1_1 (tb0, tb1); \
|
|
} \
|
|
}
|
|
/* 2x vertical downsampling without cositing
|
|
*
|
|
* a x--x--x-
|
|
* O O O <---- (a + b + 1) >> 1
|
|
* b x--x--x-
|
|
* c x--x--x-
|
|
* O O O
|
|
* d x--x--x-
|
|
*/
|
|
#define MAKE_DOWNSAMPLE_V2(name,type) \
|
|
static void \
|
|
video_chroma_down_v2_##name (GstVideoChromaResample *resample, \
|
|
gpointer lines[], gint width) \
|
|
{ \
|
|
type *l0 = lines[0]; \
|
|
type *l1 = lines[1]; \
|
|
\
|
|
if (l0 != l1) { \
|
|
type *d0 = l0; \
|
|
video_orc_chroma_down_v2_##name (d0, l0, l1, width); \
|
|
} \
|
|
\
|
|
if (resample->h_resample) \
|
|
resample->h_resample (resample, l0, width); \
|
|
}
|
|
/* 2x vertical downsampling interlaced without cositing
|
|
*
|
|
* even odd
|
|
*
|
|
* a x--x--x---------------
|
|
* O O O <---
|
|
* b --------------x--x--x-
|
|
* c x--x--x---------------
|
|
* O O O <---
|
|
* d --------------x--x--x-
|
|
*/
|
|
#define MAKE_DOWNSAMPLE_VI2(name,type) \
|
|
static void \
|
|
video_chroma_down_vi2_##name (GstVideoChromaResample *resample, \
|
|
gpointer lines[], gint width) \
|
|
{ \
|
|
/* FIXME */ \
|
|
if (resample->h_resample) \
|
|
resample->h_resample (resample, lines[0], width); \
|
|
}
|
|
|
|
MAKE_UPSAMPLE_H2 (u16, guint16);
|
|
MAKE_UPSAMPLE_H2 (u8, guint8);
|
|
MAKE_UPSAMPLE_V2 (u16, guint16);
|
|
MAKE_UPSAMPLE_V2 (u8, guint8);
|
|
MAKE_UPSAMPLE_VI2 (u16, guint16);
|
|
MAKE_UPSAMPLE_VI2 (u8, guint8);
|
|
MAKE_DOWNSAMPLE_H2 (u16, guint16);
|
|
MAKE_DOWNSAMPLE_H2_ORC (u8, guint8);
|
|
MAKE_DOWNSAMPLE_V2 (u16, guint16);
|
|
MAKE_DOWNSAMPLE_V2 (u8, guint8);
|
|
MAKE_DOWNSAMPLE_VI2 (u16, guint16);
|
|
MAKE_DOWNSAMPLE_VI2 (u8, guint8);
|
|
|
|
/* 4x horizontal upsampling without cositing
|
|
*
|
|
* +---------- (7*a + b + 4) >> 3
|
|
* | +-------- (5*a + 3*b + 4) >> 3
|
|
* a a | | +------ (3*a + 5*b + 4) >> 3
|
|
* | | | | | +---- ( a + 7*b + 4) >> 3
|
|
* v v v v v v
|
|
* O-O-O-O-O-O-O-O-
|
|
* x x
|
|
* a b
|
|
*/
|
|
#define MAKE_UPSAMPLE_H4(name,type) \
|
|
static void \
|
|
video_chroma_up_h4_##name (GstVideoChromaResample *resample, \
|
|
gpointer pixels, gint width) \
|
|
{ \
|
|
type *p = pixels; \
|
|
gint i; \
|
|
type tr0, tr1; \
|
|
type tb0, tb1; \
|
|
\
|
|
tr1 = PR(0); \
|
|
tb1 = PB(0); \
|
|
for (i = 2; i < width - 3; i += 4) { \
|
|
tr0 = tr1, tr1 = PR(i+2); \
|
|
tb0 = tb1, tb1 = PB(i+2); \
|
|
\
|
|
PR(i) = FILT_7_1 (tr0, tr1); \
|
|
PB(i) = FILT_7_1 (tb0, tb1); \
|
|
PR(i+1) = FILT_5_3 (tr0, tr1); \
|
|
PB(i+1) = FILT_5_3 (tb0, tb1); \
|
|
PR(i+2) = FILT_3_5 (tr0, tr1); \
|
|
PB(i+2) = FILT_3_5 (tb0, tb1); \
|
|
PR(i+3) = FILT_1_7 (tr0, tr1); \
|
|
PB(i+3) = FILT_1_7 (tb0, tb1); \
|
|
} \
|
|
}
|
|
|
|
/* 4x vertical upsampling without cositing
|
|
*
|
|
* O--O--O- <---- a
|
|
* O--O--O- <---- a
|
|
* a x x x
|
|
* O--O--O- <---- (7*a + b + 4) >> 3
|
|
* O--O--O- <---- (5*a + 3*b + 4) >> 3
|
|
* O--O--O- <---- (3*a + 5*b + 4) >> 3
|
|
* O--O--O- <-----( a + 7*b + 4) >> 3
|
|
* b x x x
|
|
* O--O--O-
|
|
* O--O--O-
|
|
*/
|
|
#define MAKE_UPSAMPLE_V4(name,type) \
|
|
static void \
|
|
video_chroma_up_v4_##name (GstVideoChromaResample *resample, \
|
|
gpointer lines[], gint width) \
|
|
{ \
|
|
gint i; \
|
|
type *l0 = lines[0]; \
|
|
type *l1 = lines[1]; \
|
|
type *l2 = lines[2]; \
|
|
type *l3 = lines[3]; \
|
|
type tr0, tr1; \
|
|
type tb0, tb1; \
|
|
\
|
|
if (resample->h_resample) { \
|
|
if (l0 != l1) { \
|
|
resample->h_resample (resample, l0, width); \
|
|
resample->h_resample (resample, l1, width); \
|
|
} \
|
|
if (l2 != l3) { \
|
|
resample->h_resample (resample, l2, width); \
|
|
resample->h_resample (resample, l3, width); \
|
|
} \
|
|
} \
|
|
if (l0 != l1 && l2 != l3) { \
|
|
for (i = 0; i < width; i++) { \
|
|
tr0 = PR0(i), tr1 = PR2(i); \
|
|
tb0 = PB0(i), tb1 = PB2(i); \
|
|
\
|
|
PR0(i) = FILT_7_1 (tr0, tr1); \
|
|
PB0(i) = FILT_7_1 (tb0, tb1); \
|
|
PR1(i) = FILT_5_3 (tr0, tr1); \
|
|
PB1(i) = FILT_5_3 (tb0, tb1); \
|
|
PR2(i) = FILT_3_5 (tr0, tr1); \
|
|
PB2(i) = FILT_3_5 (tb0, tb1); \
|
|
PR3(i) = FILT_1_7 (tr0, tr1); \
|
|
PB3(i) = FILT_1_7 (tb0, tb1); \
|
|
} \
|
|
} \
|
|
}
|
|
/* 4x vertical upsampling interlaced without cositing
|
|
*
|
|
*/
|
|
#define MAKE_UPSAMPLE_VI4(name,type) \
|
|
static void \
|
|
video_chroma_up_vi4_##name (GstVideoChromaResample *resample, \
|
|
gpointer lines[], gint width) \
|
|
{ \
|
|
/* FIXME */ \
|
|
if (resample->h_resample) { \
|
|
resample->h_resample (resample, lines[0], width); \
|
|
} \
|
|
}
|
|
|
|
/* 4x horizontal downsampling without cositing
|
|
*
|
|
* +------ (a + 3*b + 3*c + d + 4) >> 3
|
|
* |
|
|
* v
|
|
* ---O-------O---
|
|
* x x x x x x x x
|
|
* a b c d e f g h
|
|
*/
|
|
#define MAKE_DOWNSAMPLE_H4(name,type) \
|
|
static void \
|
|
video_chroma_down_h4_##name (GstVideoChromaResample *resample, \
|
|
gpointer pixels, gint width) \
|
|
{ \
|
|
type *p = pixels; \
|
|
gint i; \
|
|
\
|
|
for (i = 0; i < width - 4; i += 4) { \
|
|
type tr0 = PR(i), tr1 = PR(i+1), tr2 = PR(i+2), tr3 = PR(i+3); \
|
|
type tb0 = PB(i), tb1 = PB(i+1), tb2 = PB(i+2), tb3 = PB(i+3); \
|
|
\
|
|
PR(i) = FILT_1_3_3_1 (tr0, tr1, tr2, tr3); \
|
|
PB(i) = FILT_1_3_3_1 (tb0, tb1, tb2, tb3); \
|
|
} \
|
|
}
|
|
|
|
/* 4x vertical downsampling without cositing
|
|
*
|
|
* a x--x--x-
|
|
* b x--x--x-
|
|
* O O O <---- (a + 3*b + 3*c + d + 4) >> 4
|
|
* c x--x--x-
|
|
* d x--x--x-
|
|
* e x--x--x-
|
|
* f x--x--x-
|
|
* O O O
|
|
* g x--x--x-
|
|
* h x--x--x-
|
|
*/
|
|
#define MAKE_DOWNSAMPLE_V4(name,type) \
|
|
static void \
|
|
video_chroma_down_v4_##name (GstVideoChromaResample *resample, \
|
|
gpointer lines[], gint width) \
|
|
{ \
|
|
type *l0 = lines[0]; \
|
|
type *l1 = lines[1]; \
|
|
type *l2 = lines[2]; \
|
|
type *l3 = lines[3]; \
|
|
type *d = l0; \
|
|
\
|
|
video_orc_chroma_down_v4_##name(d, l0, l1, l2, l3, width); \
|
|
\
|
|
if (resample->h_resample) \
|
|
resample->h_resample (resample, l0, width); \
|
|
}
|
|
/* 4x vertical downsampling interlaced without cositing
|
|
*
|
|
*/
|
|
#define MAKE_DOWNSAMPLE_VI4(name,type) \
|
|
static void \
|
|
video_chroma_down_vi4_##name (GstVideoChromaResample *resample, \
|
|
gpointer lines[], gint width) \
|
|
{ \
|
|
/* FIXME */ \
|
|
if (resample->h_resample) { \
|
|
resample->h_resample (resample, lines[0], width); \
|
|
} \
|
|
}
|
|
|
|
MAKE_UPSAMPLE_H4 (u16, guint16);
|
|
MAKE_UPSAMPLE_H4 (u8, guint8);
|
|
MAKE_UPSAMPLE_V4 (u16, guint16);
|
|
MAKE_UPSAMPLE_V4 (u8, guint8);
|
|
MAKE_UPSAMPLE_VI4 (u16, guint16);
|
|
MAKE_UPSAMPLE_VI4 (u8, guint8);
|
|
MAKE_DOWNSAMPLE_H4 (u16, guint16);
|
|
MAKE_DOWNSAMPLE_H4 (u8, guint8);
|
|
MAKE_DOWNSAMPLE_V4 (u16, guint16);
|
|
MAKE_DOWNSAMPLE_V4 (u8, guint8);
|
|
MAKE_DOWNSAMPLE_VI4 (u16, guint16);
|
|
MAKE_DOWNSAMPLE_VI4 (u8, guint8);
|
|
|
|
/* 2x horizontal upsampling with cositing
|
|
*
|
|
* a +------ (a + b + 1) >> 1
|
|
* | |
|
|
* v v
|
|
* O-O-O-O
|
|
* x x
|
|
* a b
|
|
*/
|
|
#define MAKE_UPSAMPLE_H2_CS_ORC(name,type) \
|
|
static void \
|
|
video_chroma_up_h2_cs_##name (GstVideoChromaResample *resample, \
|
|
gpointer pixels, gint width) \
|
|
{ \
|
|
type *p = pixels; \
|
|
/* ORC version is slower */ \
|
|
video_orc_chroma_up_h2_cs_##name (p, p, p, width-1); \
|
|
}
|
|
|
|
#define MAKE_UPSAMPLE_H2_CS(name,type) \
|
|
static void \
|
|
video_chroma_up_h2_cs_##name (GstVideoChromaResample *resample, \
|
|
gpointer pixels, gint width) \
|
|
{ \
|
|
type *p = pixels; \
|
|
gint i; \
|
|
\
|
|
for (i = 1; i < width - 1; i += 2) { \
|
|
PR(i) = FILT_1_1 (PR(i-1), PR(i+1)); \
|
|
PB(i) = FILT_1_1 (PB(i-1), PB(i+1)); \
|
|
} \
|
|
}
|
|
/* 2x vertical upsampling with cositing
|
|
*
|
|
* a x O--O--O- <---- a
|
|
* O--O--O- <---- (a + b + 1) >> 1
|
|
* b x O--O--O-
|
|
* O--O--O-
|
|
*/
|
|
#define MAKE_UPSAMPLE_V2_CS(name,type) \
|
|
static void \
|
|
video_chroma_up_v2_cs_##name (GstVideoChromaResample *resample, \
|
|
gpointer lines[], gint width) \
|
|
{ \
|
|
/* FIXME */ \
|
|
if (resample->h_resample) { \
|
|
resample->h_resample (resample, lines[0], width); \
|
|
} \
|
|
}
|
|
/* 2x vertical upsampling interlaced with cositing
|
|
*
|
|
*/
|
|
#define MAKE_UPSAMPLE_VI2_CS(name,type) \
|
|
static void \
|
|
video_chroma_up_vi2_cs_##name (GstVideoChromaResample *resample, \
|
|
gpointer lines[], gint width) \
|
|
{ \
|
|
/* FIXME */ \
|
|
if (resample->h_resample) { \
|
|
resample->h_resample (resample, lines[0], width); \
|
|
} \
|
|
}
|
|
|
|
/* 2x horizontal downsampling with cositing
|
|
*
|
|
* a
|
|
* | +------ (b + 2*c + d + 2) >> 2
|
|
* v v
|
|
* O---O---O---
|
|
* x x x x x x
|
|
* a b c d e f
|
|
*/
|
|
#define MAKE_DOWNSAMPLE_H2_CS(name,type) \
|
|
static void \
|
|
video_chroma_down_h2_cs_##name (GstVideoChromaResample *resample, \
|
|
gpointer pixels, gint width) \
|
|
{ \
|
|
type *p = pixels; \
|
|
gint i; \
|
|
\
|
|
if (width < 2) \
|
|
return; \
|
|
\
|
|
PR(0) = FILT_3_1 (PR(0), PR(1)); \
|
|
PB(0) = FILT_3_1 (PB(0), PB(1)); \
|
|
\
|
|
for (i = 2; i < width - 2; i += 2) { \
|
|
PR(i) = FILT_1_2_1 (PR(i-1), PR(i), PR(i+1)); \
|
|
PB(i) = FILT_1_2_1 (PB(i-1), PB(i), PB(i+1)); \
|
|
} \
|
|
if (i < width) { \
|
|
PR(i) = FILT_1_3 (PR(i-1), PR(i)); \
|
|
PB(i) = FILT_1_3 (PB(i-1), PB(i)); \
|
|
} \
|
|
}
|
|
/* 2x vertical downsampling with cositing
|
|
*
|
|
* a x O--O--O- <---- a
|
|
* b x --------
|
|
* c x O--O--O- <---- (b + 2*c + d + 2) >> 2
|
|
* d x --------
|
|
* e x O--O--O-
|
|
* f x --------
|
|
*/
|
|
#define MAKE_DOWNSAMPLE_V2_CS(name,type) \
|
|
static void \
|
|
video_chroma_down_v2_cs_##name (GstVideoChromaResample *resample, \
|
|
gpointer lines[], gint width) \
|
|
{ \
|
|
/* FIXME */ \
|
|
if (resample->h_resample) { \
|
|
resample->h_resample (resample, lines[0], width); \
|
|
} \
|
|
}
|
|
/* 2x vertical downsampling interlaced with cositing
|
|
*
|
|
*/
|
|
#define MAKE_DOWNSAMPLE_VI2_CS(name,type) \
|
|
static void \
|
|
video_chroma_down_vi2_cs_##name (GstVideoChromaResample *resample, \
|
|
gpointer lines[], gint width) \
|
|
{ \
|
|
/* FIXME */ \
|
|
if (resample->h_resample) { \
|
|
resample->h_resample (resample, lines[0], width); \
|
|
} \
|
|
}
|
|
|
|
MAKE_UPSAMPLE_H2_CS (u16, guint16);
|
|
MAKE_UPSAMPLE_H2_CS (u8, guint8);
|
|
MAKE_UPSAMPLE_V2_CS (u16, guint16);
|
|
MAKE_UPSAMPLE_V2_CS (u8, guint8);
|
|
MAKE_UPSAMPLE_VI2_CS (u16, guint16);
|
|
MAKE_UPSAMPLE_VI2_CS (u8, guint8);
|
|
MAKE_DOWNSAMPLE_H2_CS (u16, guint16);
|
|
MAKE_DOWNSAMPLE_H2_CS (u8, guint8);
|
|
MAKE_DOWNSAMPLE_V2_CS (u16, guint16);
|
|
MAKE_DOWNSAMPLE_V2_CS (u8, guint8);
|
|
MAKE_DOWNSAMPLE_VI2_CS (u16, guint16);
|
|
MAKE_DOWNSAMPLE_VI2_CS (u8, guint8);
|
|
|
|
/* 4x horizontal upsampling with cositing
|
|
*
|
|
* +---------- (3*a + b + 2) >> 2
|
|
* a | +-------- ( a + b + 1) >> 1
|
|
* | | | +------ ( a + 3*b + 2) >> 2
|
|
* v v v v
|
|
* O-O-O-O-O-O-O-O
|
|
* x x
|
|
* a b
|
|
*/
|
|
#define MAKE_UPSAMPLE_H4_CS(name,type) \
|
|
static void \
|
|
video_chroma_up_h4_cs_##name (GstVideoChromaResample *resample, \
|
|
gpointer pixels, gint width) \
|
|
{ \
|
|
type *p = pixels; \
|
|
gint i; \
|
|
\
|
|
for (i = 0; i < width - 4; i += 4) { \
|
|
type tr0 = PR(i), tr1 = PR(i+4); \
|
|
type tb0 = PB(i), tb1 = PB(i+4); \
|
|
\
|
|
PR(i+1) = FILT_3_1 (tr0, tr1); \
|
|
PB(i+1) = FILT_3_1 (tb0, tb1); \
|
|
PR(i+2) = FILT_1_1 (tr0, tr1); \
|
|
PB(i+2) = FILT_1_1 (tb0, tb1); \
|
|
PR(i+3) = FILT_1_3 (tr0, tr1); \
|
|
PB(i+3) = FILT_1_3 (tb0, tb1); \
|
|
} \
|
|
}
|
|
/* 4x vertical upsampling with cositing
|
|
*
|
|
* a x O--O--O- <---- a
|
|
* O--O--O- <---- (3*a + b + 2) >> 2
|
|
* O--O--O- <---- ( a + b + 1) >> 1
|
|
* O--O--O- <---- ( a + 3*b + 2) >> 2
|
|
* b x O--O--O-
|
|
* O--O--O-
|
|
*/
|
|
#define MAKE_UPSAMPLE_V4_CS(name,type) \
|
|
static void \
|
|
video_chroma_up_v4_cs_##name (GstVideoChromaResample *resample, \
|
|
gpointer lines[], gint width) \
|
|
{ \
|
|
/* FIXME */ \
|
|
if (resample->h_resample) { \
|
|
resample->h_resample (resample, lines[0], width); \
|
|
} \
|
|
}
|
|
/* 4x vertical upsampling interlaced with cositing
|
|
*
|
|
*/
|
|
#define MAKE_UPSAMPLE_VI4_CS(name,type) \
|
|
static void \
|
|
video_chroma_up_vi4_cs_##name (GstVideoChromaResample *resample, \
|
|
gpointer lines[], gint width) \
|
|
{ \
|
|
/* FIXME */ \
|
|
if (resample->h_resample) { \
|
|
resample->h_resample (resample, lines[0], width); \
|
|
} \
|
|
}
|
|
/* 4x horizontal downsampling with cositing
|
|
*
|
|
* a
|
|
* | +------ (b + 2*c + 3*d + 4*e + 3*f + 2*g + h + 8) >> 16
|
|
* v v
|
|
* O-------O-------
|
|
* x x x x x x x x
|
|
* a b c d e f g h
|
|
*/
|
|
#define MAKE_DOWNSAMPLE_H4_CS(name,type) \
|
|
static void \
|
|
video_chroma_down_h4_cs_##name (GstVideoChromaResample *resample, \
|
|
gpointer pixels, gint width) \
|
|
{ \
|
|
type *p = pixels; \
|
|
gint i; \
|
|
\
|
|
if (width < 4) \
|
|
return; \
|
|
\
|
|
PR(0) = FILT_10_3_2_1 (PR(0), PR(1), PR(2), PR(3)); \
|
|
PB(0) = FILT_10_3_2_1 (PB(0), PB(1), PB(2), PB(3)); \
|
|
\
|
|
for (i = 4; i < width - 4; i += 4) { \
|
|
PR(i) = FILT_1_2_3_4_3_2_1 (PR(i-3), PR(i-2), PR(i-1), PR(i), PR(i+1), PR(i+2), PR(i+3)); \
|
|
PB(i) = FILT_1_2_3_4_3_2_1 (PB(i-3), PB(i-2), PB(i-1), PB(i), PB(i+1), PB(i+2), PB(i+3)); \
|
|
} \
|
|
if (i < width) { \
|
|
PR(i) = FILT_1_2_3_10 (PR(i-3), PR(i-2), PR(i-1), PR(i)); \
|
|
PB(i) = FILT_1_2_3_10 (PB(i-3), PB(i-2), PB(i-1), PB(i)); \
|
|
} \
|
|
}
|
|
/* 4x vertical downsampling with cositing
|
|
*
|
|
* a x O--O--O- <---- a
|
|
* b x --------
|
|
* c x --------
|
|
* d x --------
|
|
* e x O--O--O- <---- (b + 2*c + 3*d + 4*e + 3*f + 2*g + h + 8) >> 16
|
|
* f x --------
|
|
* g x --------
|
|
* h x --------
|
|
* i x O--O--O-
|
|
* j x --------
|
|
*/
|
|
#define MAKE_DOWNSAMPLE_V4_CS(name,type) \
|
|
static void \
|
|
video_chroma_down_v4_cs_##name (GstVideoChromaResample *resample, \
|
|
gpointer lines[], gint width) \
|
|
{ \
|
|
/* FIXME */ \
|
|
if (resample->h_resample) { \
|
|
resample->h_resample (resample, lines[0], width); \
|
|
} \
|
|
}
|
|
/* 4x vertical downsampling interlaced with cositing
|
|
*
|
|
*/
|
|
#define MAKE_DOWNSAMPLE_VI4_CS(name,type) \
|
|
static void \
|
|
video_chroma_down_vi4_cs_##name (GstVideoChromaResample *resample, \
|
|
gpointer lines[], gint width) \
|
|
{ \
|
|
/* FIXME */ \
|
|
if (resample->h_resample) { \
|
|
resample->h_resample (resample, lines[0], width); \
|
|
} \
|
|
}
|
|
|
|
MAKE_UPSAMPLE_H4_CS (u16, guint16);
|
|
MAKE_UPSAMPLE_H4_CS (u8, guint8);
|
|
MAKE_UPSAMPLE_V4_CS (u16, guint16);
|
|
MAKE_UPSAMPLE_V4_CS (u8, guint8);
|
|
MAKE_UPSAMPLE_VI4_CS (u16, guint16);
|
|
MAKE_UPSAMPLE_VI4_CS (u8, guint8);
|
|
MAKE_DOWNSAMPLE_H4_CS (u16, guint16);
|
|
MAKE_DOWNSAMPLE_H4_CS (u8, guint8);
|
|
MAKE_DOWNSAMPLE_V4_CS (u16, guint16);
|
|
MAKE_DOWNSAMPLE_V4_CS (u8, guint8);
|
|
MAKE_DOWNSAMPLE_VI4_CS (u16, guint16);
|
|
MAKE_DOWNSAMPLE_VI4_CS (u8, guint8);
|
|
|
|
typedef struct
|
|
{
|
|
void (*resample) (GstVideoChromaResample * resample, gpointer pixels,
|
|
gint width);
|
|
} HorizResampler;
|
|
|
|
static const HorizResampler h_resamplers[] = {
|
|
{NULL},
|
|
{video_chroma_up_h2_u8},
|
|
{video_chroma_down_h2_u8},
|
|
{video_chroma_up_h2_u16},
|
|
{video_chroma_down_h2_u16},
|
|
{video_chroma_up_h2_cs_u8},
|
|
{video_chroma_down_h2_cs_u8},
|
|
{video_chroma_up_h2_cs_u16},
|
|
{video_chroma_down_h2_cs_u16},
|
|
{video_chroma_up_h4_u8},
|
|
{video_chroma_down_h4_u8},
|
|
{video_chroma_up_h4_u16},
|
|
{video_chroma_down_h4_u16},
|
|
{video_chroma_up_h4_cs_u8},
|
|
{video_chroma_down_h4_cs_u8},
|
|
{video_chroma_up_h4_cs_u16},
|
|
{video_chroma_down_h4_cs_u16}
|
|
};
|
|
|
|
typedef struct
|
|
{
|
|
void (*resample) (GstVideoChromaResample * resample, gpointer lines[],
|
|
gint width);
|
|
guint n_lines;
|
|
gint offset;
|
|
} VertResampler;
|
|
|
|
static void
|
|
video_chroma_none (GstVideoChromaResample * resample,
|
|
gpointer lines[], gint width)
|
|
{
|
|
if (resample->h_resample)
|
|
resample->h_resample (resample, lines[0], width);
|
|
}
|
|
|
|
static const VertResampler v_resamplers[] = {
|
|
{video_chroma_none, 1, 0},
|
|
{video_chroma_up_v2_u8, 2, -1},
|
|
{video_chroma_down_v2_u8, 2, 0},
|
|
/* 16 bits */
|
|
{video_chroma_up_v2_u16, 2, -1},
|
|
{video_chroma_down_v2_u16, 2, 0},
|
|
/* cosited */
|
|
{video_chroma_up_v2_cs_u8, 1, 0}, /* IMPLEMENT ME */
|
|
{video_chroma_down_v2_cs_u8, 1, 0}, /* IMPLEMENT ME */
|
|
{video_chroma_up_v2_cs_u16, 1, 0}, /* IMPLEMENT ME */
|
|
{video_chroma_down_v2_cs_u16, 1, 0}, /* IMPLEMENT ME */
|
|
/* 4x */
|
|
{video_chroma_up_v4_u8, 4, -2},
|
|
{video_chroma_down_v4_u8, 4, 0},
|
|
{video_chroma_up_v4_u16, 4, -2},
|
|
{video_chroma_down_v4_u16, 4, 0},
|
|
{video_chroma_up_v4_cs_u8, 1, 0}, /* IMPLEMENT ME */
|
|
{video_chroma_down_v4_cs_u8, 1, 0}, /* IMPLEMENT ME */
|
|
{video_chroma_up_v4_cs_u16, 1, 0}, /* IMPLEMENT ME */
|
|
{video_chroma_down_v4_cs_u16, 1, 0}, /* IMPLEMENT ME */
|
|
/* interlaced */
|
|
{video_chroma_up_vi2_u8, 4, -2},
|
|
{video_chroma_down_vi2_u8, 1, 0}, /* IMPLEMENT ME */
|
|
{video_chroma_up_vi2_u16, 4, -2},
|
|
{video_chroma_down_vi2_u16, 1, 0}, /* IMPLEMENT ME */
|
|
{video_chroma_up_vi2_cs_u8, 1, 0}, /* IMPLEMENT ME */
|
|
{video_chroma_down_vi2_cs_u8, 1, 0}, /* IMPLEMENT ME */
|
|
{video_chroma_up_vi2_cs_u16, 1, 0}, /* IMPLEMENT ME */
|
|
{video_chroma_down_vi2_cs_u16, 1, 0}, /* IMPLEMENT ME */
|
|
{video_chroma_up_vi4_u8, 1, 0}, /* IMPLEMENT ME */
|
|
{video_chroma_down_vi4_u8, 1, 0}, /* IMPLEMENT ME */
|
|
{video_chroma_up_vi4_u16, 1, 0}, /* IMPLEMENT ME */
|
|
{video_chroma_down_vi4_u16, 1, 0}, /* IMPLEMENT ME */
|
|
{video_chroma_up_vi4_cs_u8, 1, 0}, /* IMPLEMENT ME */
|
|
{video_chroma_down_vi4_cs_u8, 1, 0}, /* IMPLEMENT ME */
|
|
{video_chroma_up_vi4_cs_u16, 1, 0}, /* IMPLEMENT ME */
|
|
{video_chroma_down_vi4_cs_u16, 1, 0}, /* IMPLEMENT ME */
|
|
};
|
|
|
|
/**
|
|
* gst_video_chroma_resample_new: (skip)
|
|
* @method: a #GstVideoChromaMethod
|
|
* @site: a #GstVideoChromaSite
|
|
* @flags: #GstVideoChromaFlags
|
|
* @format: the #GstVideoFormat
|
|
* @h_factor: horizontal resampling factor
|
|
* @v_factor: vertical resampling factor
|
|
*
|
|
* Create a new resampler object for the given parameters. When @h_factor or
|
|
* @v_factor is > 0, upsampling will be used, otherwise subsampling is
|
|
* performed.
|
|
*
|
|
* Returns: a new #GstVideoChromaResample that should be freed with
|
|
* gst_video_chroma_resample_free() after usage.
|
|
*/
|
|
GstVideoChromaResample *
|
|
gst_video_chroma_resample_new (GstVideoChromaMethod method,
|
|
GstVideoChromaSite site, GstVideoChromaFlags flags,
|
|
GstVideoFormat format, gint h_factor, gint v_factor)
|
|
{
|
|
GstVideoChromaResample *result;
|
|
guint cosite, h_index, v_index, bits;
|
|
|
|
/* no resampling */
|
|
if (h_factor == 0 && v_factor == 0)
|
|
return NULL;
|
|
|
|
if (format == GST_VIDEO_FORMAT_AYUV)
|
|
bits = 8;
|
|
else if (format == GST_VIDEO_FORMAT_AYUV64)
|
|
bits = 16;
|
|
else
|
|
return NULL;
|
|
|
|
cosite = (site & GST_VIDEO_CHROMA_SITE_H_COSITED ? 1 : 0);
|
|
if (h_factor == 0)
|
|
h_index = 0;
|
|
else
|
|
h_index =
|
|
((ABS (h_factor) - 1) * 8) + (cosite ? 4 : 0) + (bits ==
|
|
16 ? 2 : 0) + (h_factor < 0 ? 1 : 0) + 1;
|
|
|
|
GST_DEBUG ("h_resample %d, factor %d, cosite %d", h_index, h_factor, cosite);
|
|
|
|
cosite = (site & GST_VIDEO_CHROMA_SITE_V_COSITED ? 1 : 0);
|
|
if (v_factor == 0)
|
|
v_index = 0;
|
|
else
|
|
v_index =
|
|
((ABS (v_factor) - 1) * 8) + (cosite ? 4 : 0) + (bits ==
|
|
16 ? 2 : 0) + (v_factor < 0 ? 1 : 0) + 1;
|
|
|
|
if (flags & GST_VIDEO_CHROMA_FLAG_INTERLACED)
|
|
v_index += 16;
|
|
|
|
GST_DEBUG ("v_resample %d, factor %d, cosite %d", v_index, v_factor, cosite);
|
|
|
|
result = g_slice_new (GstVideoChromaResample);
|
|
result->method = method;
|
|
result->site = site;
|
|
result->flags = flags;
|
|
result->format = format;
|
|
result->h_factor = h_factor;
|
|
result->v_factor = v_factor;
|
|
result->h_resample = h_resamplers[h_index].resample;
|
|
result->v_resample = v_resamplers[v_index].resample;
|
|
result->n_lines = v_resamplers[v_index].n_lines;
|
|
result->offset = v_resamplers[v_index].offset;
|
|
|
|
GST_DEBUG ("resample %p, bits %d, n_lines %u, offset %d", result, bits,
|
|
result->n_lines, result->offset);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_video_chroma_resample_get_info:
|
|
* @resample: a #GstVideoChromaResample
|
|
* @n_lines: (out) (optional): the number of input lines
|
|
* @offset: (out) (optional): the first line
|
|
*
|
|
* The resampler must be fed @n_lines at a time. The first line should be
|
|
* at @offset.
|
|
*/
|
|
void
|
|
gst_video_chroma_resample_get_info (GstVideoChromaResample * resample,
|
|
guint * n_lines, gint * offset)
|
|
{
|
|
g_return_if_fail (resample != NULL);
|
|
|
|
if (n_lines)
|
|
*n_lines = resample->n_lines;
|
|
if (offset)
|
|
*offset = resample->offset;
|
|
}
|
|
|
|
/**
|
|
* gst_video_chroma_resample_free:
|
|
* @resample: a #GstVideoChromaResample
|
|
*
|
|
* Free @resample
|
|
*/
|
|
void
|
|
gst_video_chroma_resample_free (GstVideoChromaResample * resample)
|
|
{
|
|
g_return_if_fail (resample != NULL);
|
|
|
|
g_slice_free (GstVideoChromaResample, resample);
|
|
}
|
|
|
|
/**
|
|
* gst_video_chroma_resample:
|
|
* @resample: a #GstVideoChromaResample
|
|
* @lines: pixel lines
|
|
* @width: the number of pixels on one line
|
|
*
|
|
* Perform resampling of @width chroma pixels in @lines.
|
|
*/
|
|
void
|
|
gst_video_chroma_resample (GstVideoChromaResample * resample,
|
|
gpointer lines[], gint width)
|
|
{
|
|
g_return_if_fail (resample != NULL);
|
|
|
|
resample->v_resample (resample, lines, width);
|
|
}
|