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gstreamer/gst-libs/gst/video/video-chroma.c
Wim Taymans 8ac3dbc4f3 video-chroma: don't crash on NULL resamplers 
Make dummy resamplers for all cases and only execute the horizontal
resampler instead of crashing.

See https://bugzilla.gnome.org/show_bug.cgi?id=722742
2014-01-23 10:45:00 +01:00

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/* 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-format.h"
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}
};
/**
* gst_video_chroma_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 description.
*/
GstVideoChromaSite
gst_video_chroma_from_string (const gchar * s)
{
gint i;
for (i = 0; i < G_N_ELEMENTS (chromasite); i++) {
if (g_str_equal (chromasite[i].name, s))
return chromasite[i].site;
}
return GST_VIDEO_CHROMA_SITE_UNKNOWN;
}
/**
* gst_video_chroma_to_string:
* @site: a #GstVideoChromaSite
*
* Converts @site to its string representation.
*
* 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;
}
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_1_1_1(a,b,c,d) ((a) + (b) + (c) + (d) + 2) >> 2
#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) >> 16
#define FILT_1_2_3_10(a,b,c,d) ((a) + 2*(b) + 3*(c) + 10*(d) + 8) >> 16
#define FILT_1_2_3_4_3_2_1(a,b,c,d,e,f,g) ((a) + 2*(b) + 3*(c) + 4*(d) + 3*(e) + 2*(f) + (g) + 8) >> 16
/* 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(type) \
static void \
video_chroma_up_h2_##type (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(type) \
static void \
video_chroma_up_v2_##type (GstVideoChromaResample *resample, \
gpointer lines[], gint width) \
{ \
gint i; \
type *l0 = lines[0]; \
type *l1 = lines[1]; \
type tr0, tr1; \
type tb0, tb1; \
\
if (resample->h_resample) { \
resample->h_resample (resample, l0, width); \
if (l0 != l1) \
resample->h_resample (resample, l1, width); \
} \
if (l0 != l1) { \
for (i = 0; i < width; i++) { \
tr0 = PR0(i), tr1 = PR1(i); \
tb0 = PB0(i), tb1 = PB1(i); \
\
PR0(i) = FILT_3_1 (tr0, tr1); \
PB0(i) = FILT_3_1 (tb0, tb1); \
PR1(i) = FILT_1_3 (tr0, tr1); \
PB1(i) = FILT_1_3 (tb0, tb1); \
} \
} \
}
/* 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(type) \
static void \
video_chroma_up_vi2_##type (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(type) \
static void \
video_chroma_down_h2_##type (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(type) \
static void \
video_chroma_down_v2_##type (GstVideoChromaResample *resample, \
gpointer lines[], gint width) \
{ \
gint i; \
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) { \
for (i = 0; i < width; i++) { \
type tr0 = PR0(i), tr1 = PR1(i); \
type tb0 = PB0(i), tb1 = PB1(i); \
\
PR0(i) = FILT_1_1 (tr0, tr1); \
PB0(i) = FILT_1_1 (tb0, tb1); \
} \
} \
}
/* 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(type) \
static void \
video_chroma_down_vi2_##type (GstVideoChromaResample *resample, \
gpointer lines[], gint width) \
{ \
/* FIXME */ \
if (resample->h_resample) \
resample->h_resample (resample, lines[0], width); \
}
MAKE_UPSAMPLE_H2 (guint16);
MAKE_UPSAMPLE_H2 (guint8);
MAKE_UPSAMPLE_V2 (guint16);
MAKE_UPSAMPLE_V2 (guint8);
MAKE_UPSAMPLE_VI2 (guint16);
MAKE_UPSAMPLE_VI2 (guint8);
MAKE_DOWNSAMPLE_H2 (guint16);
MAKE_DOWNSAMPLE_H2 (guint8);
MAKE_DOWNSAMPLE_V2 (guint16);
MAKE_DOWNSAMPLE_V2 (guint8);
MAKE_DOWNSAMPLE_VI2 (guint16);
MAKE_DOWNSAMPLE_VI2 (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(type) \
static void \
video_chroma_up_h4_##type (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(type) \
static void \
video_chroma_up_v4_##type (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(type) \
static void \
video_chroma_up_vi4_##type (GstVideoChromaResample *resample, \
gpointer lines[], gint width) \
{ \
/* FIXME */ \
if (resample->h_resample) { \
resample->h_resample (resample, lines[0], width); \
} \
}
/* 4x horizontal downsampling without cositing
*
* +------ (a + b + c + d + 2) >> 2
* |
* v
* ---O-------O---
* x x x x x x x x
* a b c d e f g h
*/
#define MAKE_DOWNSAMPLE_H4(type) \
static void \
video_chroma_down_h4_##type (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_1_1_1 (tr0, tr1, tr2, tr3); \
PB(i) = FILT_1_1_1_1 (tb0, tb1, tb2, tb3); \
} \
}
/* 4x vertical downsampling without cositing
*
* a x--x--x-
* b x--x--x-
* O O O <---- (a + b + c + d + 2) >> 2
* 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(type) \
static void \
video_chroma_down_v4_##type (GstVideoChromaResample *resample, \
gpointer lines[], gint width) \
{ \
gint i; \
type *l0 = lines[0]; \
type *l1 = lines[1]; \
type *l2 = lines[2]; \
type *l3 = lines[3]; \
\
if (resample->h_resample) { \
resample->h_resample (resample, l0, width); \
if (l0 != l1) \
resample->h_resample (resample, l1, width); \
if (l1 != l2) \
resample->h_resample (resample, l2, width); \
if (l2 != l3) \
resample->h_resample (resample, l3, width); \
} \
for (i = 0; i < width; i++) { \
type tr0 = PR0(i), tr1 = PR1(i); \
type tr2 = PR2(i), tr3 = PR3(i); \
type tb0 = PB0(i), tb1 = PB1(i); \
type tb2 = PB2(i), tb3 = PB3(i); \
\
PR0(i) = FILT_1_1_1_1 (tr0, tr1, tr2, tr3); \
PB0(i) = FILT_1_1_1_1 (tb0, tb1, tb2, tb3); \
} \
}
/* 4x vertical downsampling interlaced without cositing
*
*/
#define MAKE_DOWNSAMPLE_VI4(type) \
static void \
video_chroma_down_vi4_##type (GstVideoChromaResample *resample, \
gpointer lines[], gint width) \
{ \
/* FIXME */ \
if (resample->h_resample) { \
resample->h_resample (resample, lines[0], width); \
} \
}
MAKE_UPSAMPLE_H4 (guint16);
MAKE_UPSAMPLE_H4 (guint8);
MAKE_UPSAMPLE_V4 (guint16);
MAKE_UPSAMPLE_V4 (guint8);
MAKE_UPSAMPLE_VI4 (guint16);
MAKE_UPSAMPLE_VI4 (guint8);
MAKE_DOWNSAMPLE_H4 (guint16);
MAKE_DOWNSAMPLE_H4 (guint8);
MAKE_DOWNSAMPLE_V4 (guint16);
MAKE_DOWNSAMPLE_V4 (guint8);
MAKE_DOWNSAMPLE_VI4 (guint16);
MAKE_DOWNSAMPLE_VI4 (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(type) \
static void \
video_chroma_up_h2_cs_##type (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(type) \
static void \
video_chroma_up_v2_cs_##type (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(type) \
static void \
video_chroma_up_vi2_cs_##type (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(type) \
static void \
video_chroma_down_h2_cs_##type (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(type) \
static void \
video_chroma_down_v2_cs_##type (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(type) \
static void \
video_chroma_down_vi2_cs_##type (GstVideoChromaResample *resample, \
gpointer lines[], gint width) \
{ \
/* FIXME */ \
if (resample->h_resample) { \
resample->h_resample (resample, lines[0], width); \
} \
}
MAKE_UPSAMPLE_H2_CS (guint16);
MAKE_UPSAMPLE_H2_CS (guint8);
MAKE_UPSAMPLE_V2_CS (guint16);
MAKE_UPSAMPLE_V2_CS (guint8);
MAKE_UPSAMPLE_VI2_CS (guint16);
MAKE_UPSAMPLE_VI2_CS (guint8);
MAKE_DOWNSAMPLE_H2_CS (guint16);
MAKE_DOWNSAMPLE_H2_CS (guint8);
MAKE_DOWNSAMPLE_V2_CS (guint16);
MAKE_DOWNSAMPLE_V2_CS (guint8);
MAKE_DOWNSAMPLE_VI2_CS (guint16);
MAKE_DOWNSAMPLE_VI2_CS (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(type) \
static void \
video_chroma_up_h4_cs_##type (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(type) \
static void \
video_chroma_up_v4_cs_##type (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(type) \
static void \
video_chroma_up_vi4_cs_##type (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(type) \
static void \
video_chroma_down_h4_cs_##type (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(type) \
static void \
video_chroma_down_v4_cs_##type (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(type) \
static void \
video_chroma_down_vi4_cs_##type (GstVideoChromaResample *resample, \
gpointer lines[], gint width) \
{ \
/* FIXME */ \
if (resample->h_resample) { \
resample->h_resample (resample, lines[0], width); \
} \
}
MAKE_UPSAMPLE_H4_CS (guint16);
MAKE_UPSAMPLE_H4_CS (guint8);
MAKE_UPSAMPLE_V4_CS (guint16);
MAKE_UPSAMPLE_V4_CS (guint8);
MAKE_UPSAMPLE_VI4_CS (guint16);
MAKE_UPSAMPLE_VI4_CS (guint8);
MAKE_DOWNSAMPLE_H4_CS (guint16);
MAKE_DOWNSAMPLE_H4_CS (guint8);
MAKE_DOWNSAMPLE_V4_CS (guint16);
MAKE_DOWNSAMPLE_V4_CS (guint8);
MAKE_DOWNSAMPLE_VI4_CS (guint16);
MAKE_DOWNSAMPLE_VI4_CS (guint8);
typedef struct
{
void (*resample) (GstVideoChromaResample * resample, gpointer pixels,
gint width);
} HorizResampler;
static const HorizResampler h_resamplers[] = {
{NULL},
{video_chroma_up_h2_guint8},
{video_chroma_down_h2_guint8},
{video_chroma_up_h2_guint16},
{video_chroma_down_h2_guint16},
{video_chroma_up_h2_cs_guint8},
{video_chroma_down_h2_cs_guint8},
{video_chroma_up_h2_cs_guint16},
{video_chroma_down_h2_cs_guint16},
{video_chroma_up_h4_guint8},
{video_chroma_down_h4_guint8},
{video_chroma_up_h4_guint16},
{video_chroma_down_h4_guint16},
{video_chroma_up_h4_cs_guint8},
{video_chroma_down_h4_cs_guint8},
{video_chroma_up_h4_cs_guint16},
{video_chroma_down_h4_cs_guint16}
};
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_guint8, 2, -1},
{video_chroma_down_v2_guint8, 2, 0},
/* 16 bits */
{video_chroma_up_v2_guint16, 2, -1},
{video_chroma_down_v2_guint16, 2, 0},
/* cosited */
{video_chroma_up_v2_cs_guint8, 1, 0}, /* IMPLEMENT ME */
{video_chroma_down_v2_cs_guint8, 1, 0}, /* IMPLEMENT ME */
{video_chroma_up_v2_cs_guint16, 1, 0}, /* IMPLEMENT ME */
{video_chroma_down_v2_cs_guint16, 1, 0}, /* IMPLEMENT ME */
/* 4x */
{video_chroma_up_v4_guint8, 4, -2},
{video_chroma_down_v4_guint8, 4, 0},
{video_chroma_up_v4_guint16, 4, -2},
{video_chroma_down_v4_guint16, 4, 0},
{video_chroma_up_v4_cs_guint8, 1, 0}, /* IMPLEMENT ME */
{video_chroma_down_v4_cs_guint8, 1, 0}, /* IMPLEMENT ME */
{video_chroma_up_v4_cs_guint16, 1, 0}, /* IMPLEMENT ME */
{video_chroma_down_v4_cs_guint16, 1, 0}, /* IMPLEMENT ME */
/* interlaced */
{video_chroma_up_vi2_guint8, 4, -2},
{video_chroma_down_vi2_guint8, 1, 0}, /* IMPLEMENT ME */
{video_chroma_up_vi2_guint16, 4, -2},
{video_chroma_down_vi2_guint16, 1, 0}, /* IMPLEMENT ME */
{video_chroma_up_vi2_cs_guint8, 1, 0}, /* IMPLEMENT ME */
{video_chroma_down_vi2_cs_guint8, 1, 0}, /* IMPLEMENT ME */
{video_chroma_up_vi2_cs_guint16, 1, 0}, /* IMPLEMENT ME */
{video_chroma_down_vi2_cs_guint16, 1, 0}, /* IMPLEMENT ME */
{video_chroma_up_vi4_guint8, 1, 0}, /* IMPLEMENT ME */
{video_chroma_down_vi4_guint8, 1, 0}, /* IMPLEMENT ME */
{video_chroma_up_vi4_guint16, 1, 0}, /* IMPLEMENT ME */
{video_chroma_down_vi4_guint16, 1, 0}, /* IMPLEMENT ME */
{video_chroma_up_vi4_cs_guint8, 1, 0}, /* IMPLEMENT ME */
{video_chroma_down_vi4_cs_guint8, 1, 0}, /* IMPLEMENT ME */
{video_chroma_up_vi4_cs_guint16, 1, 0}, /* IMPLEMENT ME */
{video_chroma_down_vi4_cs_guint16, 1, 0}, /* IMPLEMENT ME */
};
/**
* gst_video_chroma_resample_new:
* @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_factoris > 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;
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;
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 ("select resample %p %d, factor %d, "
"cosite %d, bits %d", result, h_index, h_factor, cosite, bits);
return result;
}
/**
* gst_video_chroma_resample_get_info:
* @resample: a #GstVideoChromaResample
* @n_lines: the number of input lines
* @offset: 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);
}
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