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veejay/veejay-2005/libyuv/subsample.c
Niels Elburg c84f6ca821 moved veejay-current to veejay-2005 (branch closed) 
git-svn-id: svn://code.dyne.org/veejay/trunk@509 eb8d1916-c9e9-0310-b8de-cf0c9472ead5
2006-01-20 16:43:25 +00:00

720 lines
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/*
* subsample.c: Routines to do chroma subsampling. ("Work In Progress")
*
*
* Copyright (C) 2001 Matthew J. Marjanovic <maddog@mir.com>
* 2004 Niels Elburg <nelburg@looze.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#include <config.h>
#ifdef HAVE_ASM_MMX
#include "mmx.h"
#endif
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <utils/mjpeg_types.h>
#include <libvjmem/vjmem.h>
#include <libvjmsg/vj-common.h>
#include <libyuv/yuvconv.h>
const char *ssm_id[SSM_COUNT] = {
"unknown",
"420_jpeg",
"420_mpeg2",
#if 0
"420_dv_pal",
"411_dv_ntsc"
#endif
};
const char *ssm_description[SSM_COUNT] = {
"unknown/illegal",
"4:2:0, JPEG/MPEG-1, interstitial siting",
"4:2:0, MPEG-2, horizontal cositing",
#if 0
"4:2:0, DV-PAL, cosited, Cb/Cr line alternating",
"4:1:1, DV-NTSC"
"4:2:2",
#endif
};
// forward decl
void ss_420_to_422(uint8_t *buffer, int width, int height);
void ss_422_to_420(uint8_t *buffer, int width, int height);
typedef struct
{
uint8_t *buf;
} yuv_sampler_t;
static uint8_t *sample_buffer = NULL;
static int go = 0;
void *subsample_init(int len)
{
void *ret = NULL;
yuv_sampler_t *s = (yuv_sampler_t*) vj_malloc(sizeof(yuv_sampler_t) );
if(!s)
return ret;
s->buf = (uint8_t*) vj_malloc(sizeof(uint8_t) * len );
if(!s->buf)
return ret;
return (void*) s;
}
void subsample_free(void *data)
{
yuv_sampler_t *sampler = (yuv_sampler_t*) data;
if(sampler)
{
if(sampler->buf) free(sampler->buf);
free(sampler);
}
sampler = NULL;
}
/*************************************************************************
* Chroma Subsampling
*************************************************************************/
/* vertical/horizontal interstitial siting
*
* Y Y Y Y
* C C
* Y Y Y Y
*
* Y Y Y Y
* C C
* Y Y Y Y
*
*/
/*
static void ss_444_to_420jpeg(uint8_t *buffer, int width, int height)
{
uint8_t *in0, *in1, *out;
int x, y;
in0 = buffer;
in1 = buffer + width;
out = buffer;
for (y = 0; y < height; y += 2) {
for (x = 0; x < width; x += 2) {
*out = (in0[0] + in0[1] + in1[0] + in1[1]) >> 2;
in0 += 2;
in1 += 2;
out++;
}
in0 += width;
in1 += width;
}
}
*/
/*
using weighted averaging for subsampling 2x2 -> 1x1
here, 4 pixels are filled in each inner loop, (weighting
16 source pixels)
*/
static void ss_444_to_420jpeg(uint8_t *buffer, int width, int height)
{
const uint8_t *in0, *in1;
uint8_t *out;
int x, y = height;
in0 = buffer;
in1 = buffer + width;
out = buffer;
for (y = 0; y < height; y += 4) {
for (x = 0; x < width; x += 4) {
out[0] = (in0[0] + 3 * (in0[1] + in1[0]) + (9 * in1[1]) + 8) >> 4;
out[1] = (in0[2] + 3 * (in0[3] + in1[2]) + (9 * in1[3]) + 8) >> 4;
out[2] = (in0[4] + 3 * (in0[5] + in1[4]) + (9 * in1[5]) + 8) >> 4;
out[3] = (in0[6] + 3 * (in0[7] + in1[6]) + (9 * in1[7]) + 8) >> 4;
in0 += 8;
in1 += 8;
out += 4;
}
for ( ; x < width; x +=2 )
{
out[0] = (in0[0] + 3 * (in0[1] + in1[0]) + (9 * in1[1]) + 8) >> 4;
in0 += 2;
in1 += 2;
out++;
}
in0 += width*2;
in1 += width*2;
}
}
/* horizontal interstitial siting
*
* Y Y Y Y
* C C C C in0
* Y Y Y Y
* C C C C
*
* Y Y Y Y
* C C out0
* Y Y Y Y
* C C
*
*
*/
/* vertical/horizontal interstitial siting
*
* Y Y Y Y
* C C C inm
* Y Y Y Y
*
* Y Y Y - Y out0
* C | C | C in0
* Y Y Y - Y out1
*
*
* C C C inp
*
*
* Each iteration through the loop reconstitutes one 2x2 block of
* pixels from the "surrounding" 3x3 block of samples...
* Boundary conditions are handled by cheap reflection; i.e. the
* center sample is simply reused.
*
*/
#define BLANK_CRB in0[1]
#define BLANK_CRB_2 (in0[1] << 1)
static void tr_420jpeg_to_444(void *data, uint8_t *buffer, int width, int height)
{
uint8_t *inm, *in0, *inp, *out0, *out1;
uint8_t cmm, cm0, cmp, c0m, c00, c0p, cpm, cp0, cpp;
int x, y;
yuv_sampler_t *sampler = (yuv_sampler_t*) data;
uint8_t *saveme = sampler->buf;
veejay_memcpy(saveme, buffer, width);
in0 = buffer + ( width * height /4) - 2;
inm = in0 - width/2;
inp = in0 + width/2;
out1 = buffer + (width * height) - 1;
out0 = out1 - width;
for (y = height; y > 0; y -= 2) {
if (y == 2) {
in0 = saveme + width/2 - 2;
inp = in0 + width/2;
}
for (x = width; x > 0; x -= 2) {
#if 0
if ((x == 2) && (y == 2)) {
cmm = in0[1];
cm0 = in0[1];
cmp = in0[2];
c0m = in0[1];
c0p = in0[2];
cpm = inp[1];
cp0 = inp[1];
cpp = inp[2];
} else if ((x == 2) && (y == height)) {
cmm = inm[1];
cm0 = inm[1];
cmp = inm[2];
c0m = in0[1];
c0p = in0[2];
cpm = in0[1];
cp0 = in0[1];
cpp = in0[2];
} else if ((x == width) && (y == height)) {
cmm = inm[0];
cm0 = inm[1];
cmp = inm[1];
c0m = in0[0];
c0p = in0[1];
cpm = in0[0];
cp0 = in0[1];
cpp = in0[1];
} else if ((x == width) && (y == 2)) {
cmm = in0[0];
cm0 = (y == 2) ? BLANK_CRB : inm[1];
cmp = ((x == width) || (y == 2)) ? BLANK_CRB : inm[2];
c0m = (x == 2) ? BLANK_CRB : in0[0];
c0p = (x == width) ? BLANK_CRB : in0[2];
cpm = ((x == 2) || (y == height)) ? BLANK_CRB : inp[0];
cp0 = (y == height) ? BLANK_CRB : inp[1];
cpp = ((x == width) || (y == height)) ? BLANK_CRB : inp[2];
} else if (x == 2) {
cmm = ((x == 2) || (y == 2)) ? BLANK_CRB : inm[0];
cm0 = (y == 2) ? BLANK_CRB : inm[1];
cmp = ((x == width) || (y == 2)) ? BLANK_CRB : inm[2];
c0m = (x == 2) ? BLANK_CRB : in0[0];
c0p = (x == width) ? BLANK_CRB : in0[2];
cpm = ((x == 2) || (y == height)) ? BLANK_CRB : inp[0];
cp0 = (y == height) ? BLANK_CRB : inp[1];
cpp = ((x == width) || (y == height)) ? BLANK_CRB : inp[2];
} else if (y == 2) {
cmm = ((x == 2) || (y == 2)) ? BLANK_CRB : inm[0];
cm0 = (y == 2) ? BLANK_CRB : inm[1];
cmp = ((x == width) || (y == 2)) ? BLANK_CRB : inm[2];
c0m = (x == 2) ? BLANK_CRB : in0[0];
c0p = (x == width) ? BLANK_CRB : in0[2];
cpm = ((x == 2) || (y == height)) ? BLANK_CRB : inp[0];
cp0 = (y == height) ? BLANK_CRB : inp[1];
cpp = ((x == width) || (y == height)) ? BLANK_CRB : inp[2];
} else if (x == width) {
cmm = ((x == 2) || (y == 2)) ? BLANK_CRB : inm[0];
cm0 = (y == 2) ? BLANK_CRB : inm[1];
cmp = ((x == width) || (y == 2)) ? BLANK_CRB : inm[2];
c0m = (x == 2) ? BLANK_CRB : in0[0];
c0p = (x == width) ? BLANK_CRB : in0[2];
cpm = ((x == 2) || (y == height)) ? BLANK_CRB : inp[0];
cp0 = (y == height) ? BLANK_CRB : inp[1];
cpp = ((x == width) || (y == height)) ? BLANK_CRB : inp[2];
} else if (y == height) {
cmm = ((x == 2) || (y == 2)) ? BLANK_CRB : inm[0];
cm0 = (y == 2) ? BLANK_CRB : inm[1];
cmp = ((x == width) || (y == 2)) ? BLANK_CRB : inm[2];
c0m = (x == 2) ? BLANK_CRB : in0[0];
c0p = (x == width) ? BLANK_CRB : in0[2];
cpm = ((x == 2) || (y == height)) ? BLANK_CRB : inp[0];
cp0 = (y == height) ? BLANK_CRB : inp[1];
cpp = ((x == width) || (y == height)) ? BLANK_CRB : inp[2];
} else {
cmm = ((x == 2) || (y == 2)) ? BLANK_CRB : inm[0];
cm0 = (y == 2) ? BLANK_CRB : inm[1];
cmp = ((x == width) || (y == 2)) ? BLANK_CRB : inm[2];
c0m = (x == 2) ? BLANK_CRB : in0[0];
c0p = (x == width) ? BLANK_CRB : in0[2];
cpm = ((x == 2) || (y == height)) ? BLANK_CRB : inp[0];
cp0 = (y == height) ? BLANK_CRB : inp[1];
cpp = ((x == width) || (y == height)) ? BLANK_CRB : inp[2];
}
c00 = in0[1];
cmm = ((x == 2) || (y == 2)) ? BLANK_CRB : inm[0];
cm0 = (y == 2) ? BLANK_CRB : inm[1];
cmp = ((x == width) || (y == 2)) ? BLANK_CRB : inm[2];
c0m = (x == 2) ? BLANK_CRB : in0[0];
c0p = (x == width) ? BLANK_CRB : in0[2];
cpm = ((x == 2) || (y == height)) ? BLANK_CRB : inp[0];
cp0 = (y == height) ? BLANK_CRB : inp[1];
cpp = ((x == width) || (y == height)) ? BLANK_CRB : inp[2];
#else
cmm = ((x == 2) || (y == 2)) ? BLANK_CRB : inm[0];
cm0 = (y == 2) ? BLANK_CRB : inm[1];
cmp = ((x == width) || (y == 2)) ? BLANK_CRB : inm[2];
c0m = (x == 2) ? BLANK_CRB : in0[0];
c00 = in0[1];
c0p = (x == width) ? BLANK_CRB : in0[2];
cpm = ((x == 2) || (y == height)) ? BLANK_CRB : inp[0];
cp0 = (y == height) ? BLANK_CRB : inp[1];
cpp = ((x == width) || (y == height)) ? BLANK_CRB : inp[2];
#endif
inm--;
in0--;
inp--;
*(out1--) = (1*cpp + 3*(cp0+c0p) + 9*c00 + 8) >> 4;
*(out1--) = (1*cpm + 3*(cp0+c0m) + 9*c00 + 8) >> 4;
*(out0--) = (1*cmp + 3*(cm0+c0p) + 9*c00 + 8) >> 4;
*(out0--) = (1*cmm + 3*(cm0+c0m) + 9*c00 + 8) >> 4;
}
out1 -= width;
out0 -= width;
}
}
// lame box filter
// the dampening of high frequencies depend
// on the directions these frequencies occur in the
// image, resulting in clear edges between certain
// group of pixels.
static void ss_420jpeg_to_444(uint8_t *buffer, int width, int height)
{
#ifndef HAVE_ASM_MMX
uint8_t *in, *out0, *out1;
int x, y;
in = buffer + (width * height / 4) - 1;
out1 = buffer + (width * height) - 1;
out0 = out1 - width;
for (y = height - 1; y >= 0; y -= 2) {
for (x = width - 1; x >= 0; x -=2) {
uint8_t val = *(in--);
*(out1--) = val;
*(out1--) = val;
*(out0--) = val;
*(out0--) = val;
}
out0 -= width;
out1 -= width;
}
#else
int x,y;
const int mmx_stride = width/8;
uint8_t *src = buffer + (width * height/4)-1;
uint8_t *dst = buffer + (width * height) -1;
uint8_t *dst2 = dst - width;
for( y = height-1; y >= 0; y -= 2)
{
for( x = 0; x < mmx_stride; x ++ )
{
movq_m2r( *src,mm0 );
movq_m2r( *src,mm1 );
movq_r2m(mm0, *dst );
movq_r2m(mm1, *(dst+8) );
movq_r2m(mm0, *dst2 );
movq_r2m(mm1, *(dst2+8) );
dst += 16;
dst2 += 16;
src += 8;
}
dst -= width;
dst2 -= width;
}
#endif
}
void ss_420_to_422(uint8_t *buffer, int width, int height)
{
//todo, 1x2 super sampling (box)
}
void ss_422_to_420(uint8_t *buffer, int width, int height )
{
//todo 2x1 down sampling (box)
}
#ifndef HAVE_ASM_MMX
static void ss_444_to_422(void *data, uint8_t *buffer, int width, int height)
{
const int dst_stride = width/2;
int x,y;
yuv_sampler_t *sampler = (yuv_sampler_t*) data;
for(y = 0; y < height; y ++)
{
uint8_t *src = sampler->buf;
uint8_t *dst = buffer + (y*dst_stride);
veejay_memcpy( src, buffer + (y*width), width );
for(x=0; x < dst_stride; x++)
{
*(dst++) = ( src[0] + src[1] ) >> 1;
src += 2;
}
}
}
#else
/* mmx_average_2_u8 (function taken from mpeg2dec, a free MPEG-2 video
* stream decoder
*
* Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
* Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
*/
static mmx_t mask1 = {0xfefefefefefefefeLL};
static mmx_t round4 = {0x0002000200020002LL};
static inline void mmx_average_4_U8 (uint8_t * dest, const uint8_t * src1,
const uint8_t * src2,
const uint8_t * src3,
const uint8_t * src4)
{
/* *dest = (*src1 + *src2 + *src3 + *src4 + 2)/ 4; */
movq_m2r (*src1, mm1); /* load 8 src1 bytes */
movq_r2r (mm1, mm2); /* copy 8 src1 bytes */
punpcklbw_r2r (mm0, mm1); /* unpack low src1 bytes */
punpckhbw_r2r (mm0, mm2); /* unpack high src1 bytes */
movq_m2r (*src2, mm3); /* load 8 src2 bytes */
movq_r2r (mm3, mm4); /* copy 8 src2 bytes */
punpcklbw_r2r (mm0, mm3); /* unpack low src2 bytes */
punpckhbw_r2r (mm0, mm4); /* unpack high src2 bytes */
paddw_r2r (mm3, mm1); /* add lows */
paddw_r2r (mm4, mm2); /* add highs */
/* now have partials in mm1 and mm2 */
movq_m2r (*src3, mm3); /* load 8 src3 bytes */
movq_r2r (mm3, mm4); /* copy 8 src3 bytes */
punpcklbw_r2r (mm0, mm3); /* unpack low src3 bytes */
punpckhbw_r2r (mm0, mm4); /* unpack high src3 bytes */
paddw_r2r (mm3, mm1); /* add lows */
paddw_r2r (mm4, mm2); /* add highs */
movq_m2r (*src4, mm5); /* load 8 src4 bytes */
movq_r2r (mm5, mm6); /* copy 8 src4 bytes */
punpcklbw_r2r (mm0, mm5); /* unpack low src4 bytes */
punpckhbw_r2r (mm0, mm6); /* unpack high src4 bytes */
paddw_r2r (mm5, mm1); /* add lows */
paddw_r2r (mm6, mm2); /* add highs */
/* now have subtotal in mm1 and mm2 */
paddw_m2r (round4, mm1);
psraw_i2r (2, mm1); /* /4 */
paddw_m2r (round4, mm2);
psraw_i2r (2, mm2); /* /4 */
packuswb_r2r (mm2, mm1); /* pack (w/ saturation) */
movq_r2m (mm1, *dest); /* store result in dest */
}
static inline void mmx_average_2_U8 (uint8_t * dest, const uint8_t * src1,
const uint8_t * src2)
{
/* *dest = (*src1 + *src2 + 1)/ 2; */
movq_m2r (*src1, mm1); /* load 8 src1 bytes */
movq_r2r (mm1, mm2); /* copy 8 src1 bytes */
movq_m2r (*src2, mm3); /* load 8 src2 bytes */
movq_r2r (mm3, mm4); /* copy 8 src2 bytes */
pxor_r2r (mm1, mm3); /* xor src1 and src2 */
pand_m2r (mask1, mm3); /* mask lower bits */
psrlq_i2r (1, mm3); /* /2 */
por_r2r (mm2, mm4); /* or src1 and src2 */
psubb_r2r (mm3, mm4); /* subtract subresults */
movq_r2m (mm4, *dest); /* store result in dest */
}
static void ss_444_to_422(void *data,uint8_t *buffer, int width, int height)
{
const int dst_stride = width/2;
const int len = width * height;
const int mmx_stride = dst_stride / 8;
int x,y;
yuv_sampler_t *sampler = (yuv_sampler_t*) data;
for(y = 0; y < height; y ++)
{
uint8_t *src = sampler->buf;
uint8_t *dst = buffer + (y*dst_stride);
veejay_memcpy( src, buffer + (y*width), width );
for(x=0; x < mmx_stride; x++)
{
mmx_average_2_U8( dst,src, src+8 );
src += 16;
dst += 8;
}
}
}
#endif
static void tr_422_to_444(uint8_t *buffer, int width, int height)
{
/* YUV 4:2:2 Planar to 4:4:4 Planar */
const int stride = width/2;
const int len = stride * height;
#ifdef HAVE_ASM_MMX
const int mmx_stride = stride / 8;
#endif
int x,y;
for( y = height-1; y > 0 ; y -- )
{
uint8_t *dst = buffer + (y * width);
uint8_t *src = buffer + (y * stride);
#ifdef HAVE_ASM_MMX
for( x = 0; x < mmx_stride; x ++ )
{
movq_m2r( *src,mm0 );
movq_m2r( *src,mm1 );
movq_r2m(mm0, *dst );
movq_r2m(mm1, *(dst+8) );
dst += 16;
src += 8;
}
#else
for(x=0; x < stride; x++) // for 1 row
{
dst[0] = src[x]; //put to dst
dst[1] = src[x];
dst+=2; // increment dst
}
#endif
}
}
/* vertical intersitial siting; horizontal cositing
*
* Y Y Y Y
* C C
* Y Y Y Y
*
* Y Y Y Y
* C C
* Y Y Y Y
*
* [1,2,1] kernel for horizontal subsampling:
*
* inX[0] [1] [2]
* | | |
* C C C C
* \ | /
* \ | /
* C
*/
static void ss_444_to_420mpeg2(uint8_t *buffer, int width, int height)
{
uint8_t *in0, *in1, *out;
int x, y;
in0 = buffer; /* points to */
in1 = buffer + width; /* second of pair of lines */
out = buffer;
for (y = 0; y < height; y += 2) {
/* first column boundary condition -- just repeat it to right */
*out = (in0[0] + (2 * in0[0]) + in0[1] +
in1[0] + (2 * in1[0]) + in1[1]) >> 3;
out++;
in0++;
in1++;
/* rest of columns just loop */
for (x = 2; x < width; x += 2) {
*out = (in0[0] + (2 * in0[1]) + in0[2] +
in1[0] + (2 * in1[1]) + in1[2]) >> 3;
in0 += 2;
in1 += 2;
out++;
}
in0 += width + 1;
in1 += width + 1;
}
}
void chroma_subsample(subsample_mode_t mode, void *data, uint8_t *ycbcr[],
int width, int height)
{
switch (mode) {
case SSM_420_JPEG_BOX:
case SSM_420_JPEG_TR:
ss_444_to_420jpeg(ycbcr[1], width, height);
ss_444_to_420jpeg(ycbcr[2], width, height);
#ifdef HAVE_ASM_MMX
emms();
#endif
break;
case SSM_420_MPEG2:
ss_444_to_420mpeg2(ycbcr[1], width, height);
ss_444_to_420mpeg2(ycbcr[2], width, height);
break;
case SSM_422_444:
ss_444_to_422(data,ycbcr[1],width,height);
ss_444_to_422(data,ycbcr[2],width,height);
#ifdef HAVE_ASM_MMX
emms();
#endif
break;
case SSM_420_422:
ss_422_to_420(ycbcr[1],width,height);
ss_422_to_420(ycbcr[2],width,height);
break;
default:
break;
}
}
void chroma_supersample(subsample_mode_t mode,void *data, uint8_t *ycbcr[],
int width, int height)
{
switch (mode) {
case SSM_420_JPEG_BOX:
ss_420jpeg_to_444(ycbcr[1], width, height);
ss_420jpeg_to_444(ycbcr[2], width, height);
#ifdef HAVE_ASM_MMX
emms();
#endif
break;
case SSM_420_JPEG_TR:
tr_420jpeg_to_444(data,ycbcr[1], width, height);
tr_420jpeg_to_444(data,ycbcr[2], width, height);
break;
case SSM_422_444:
tr_422_to_444(ycbcr[2],width,height);
tr_422_to_444(ycbcr[1],width,height);
#ifdef HAVE_ASM_MMX
emms();
#endif
break;
case SSM_420_422:
ss_420_to_422( ycbcr[1], width, height );
ss_420_to_422( ycbcr[2], width, height );
break;
case SSM_420_MPEG2:
// ss_420mpeg2_to_444(ycbcr[1], width, height);
// ss_420mpeg2_to_444(ycbcr[2], width, height);
exit(4);
break;
default:
break;
}
}
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