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1) Add MMX deinterlace code.

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2) "Fix" first and last line deinterlace.  I had second-thoughts that this might be some image filtering algorithm that someone cleverer than I created.
3) Add in-place deinterlace functions (only used when src == dst).
patch by (Fred <foohoo at shaw dot ca>)

Originally committed as revision 1113 to svn://svn.ffmpeg.org/ffmpeg/trunk
pull/126/head
Fred 22 years ago committed by Michael Niedermayer
parent 2727c35ed7
commit 5981f4e693
1 changed files with 181 additions and 51 deletions
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  1. 232
      libavcodec/imgconvert.c

232
libavcodec/imgconvert.c
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@ -22,6 +22,10 @@
#ifdef USE_FASTMEMCPY
#include "fastmemcpy.h"
#endif
#ifdef HAVE_MMX
#include "i386/mmx.h"
#endif
/* XXX: totally non optimized */
static void yuv422_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr,
@ -762,77 +766,182 @@ int img_convert(AVPicture *dst, int dst_pix_fmt,
return 0;
}
#ifdef HAVE_MMX
#define DEINT_INPLACE_LINE_LUM \
movd_m2r(lum_m4[0],mm0);\
movd_m2r(lum_m3[0],mm1);\
movd_m2r(lum_m2[0],mm2);\
movd_m2r(lum_m1[0],mm3);\
movd_m2r(lum[0],mm4);\
punpcklbw_r2r(mm7,mm0);\
movd_r2m(mm2,lum_m4[0]);\
punpcklbw_r2r(mm7,mm1);\
punpcklbw_r2r(mm7,mm2);\
punpcklbw_r2r(mm7,mm3);\
punpcklbw_r2r(mm7,mm4);\
paddw_r2r(mm3,mm1);\
psllw_i2r(1,mm2);\
paddw_r2r(mm4,mm0);\
psllw_i2r(2,mm1);\
paddw_r2r(mm6,mm2);\
paddw_r2r(mm2,mm1);\
psubusw_r2r(mm0,mm1);\
psrlw_i2r(3,mm1);\
packuswb_r2r(mm7,mm1);\
movd_r2m(mm1,lum_m2[0]);
#define DEINT_LINE_LUM \
movd_m2r(lum_m4[0],mm0);\
movd_m2r(lum_m3[0],mm1);\
movd_m2r(lum_m2[0],mm2);\
movd_m2r(lum_m1[0],mm3);\
movd_m2r(lum[0],mm4);\
punpcklbw_r2r(mm7,mm0);\
punpcklbw_r2r(mm7,mm1);\
punpcklbw_r2r(mm7,mm2);\
punpcklbw_r2r(mm7,mm3);\
punpcklbw_r2r(mm7,mm4);\
paddw_r2r(mm3,mm1);\
psllw_i2r(1,mm2);\
paddw_r2r(mm4,mm0);\
psllw_i2r(2,mm1);\
paddw_r2r(mm6,mm2);\
paddw_r2r(mm2,mm1);\
psubusw_r2r(mm0,mm1);\
psrlw_i2r(3,mm1);\
packuswb_r2r(mm7,mm1);\
movd_r2m(mm1,dst[0]);
#endif
/* filter parameters: [-1 4 2 4 -1] // 8 */
static void deinterlace_line(UINT8 *dst, UINT8 *src, int src_wrap,
int size)
static void deinterlace_line(UINT8 *dst, UINT8 *lum_m4, UINT8 *lum_m3, UINT8 *lum_m2, UINT8 *lum_m1, UINT8 *lum,
int size)
{
#ifndef HAVE_MMX
UINT8 *cm = cropTbl + MAX_NEG_CROP;
int sum;
UINT8 *s;
for(;size > 0;size--) {
s = src;
sum = -s[0];
s += src_wrap;
sum += s[0] << 2;
s += src_wrap;
sum += s[0] << 1;
s += src_wrap;
sum += s[0] << 2;
s += src_wrap;
sum += -s[0];
sum = -lum_m4[0];
sum += lum_m3[0] << 2;
sum += lum_m2[0] << 1;
sum += lum_m1[0] << 2;
sum += -lum[0];
dst[0] = cm[(sum + 4) >> 3];
lum_m4++;
lum_m3++;
lum_m2++;
lum_m1++;
lum++;
dst++;
src++;
}
#else
for (;size > 3; size-=4) {
DEINT_LINE_LUM
lum_m4+=4;
lum_m3+=4;
lum_m2+=4;
lum_m1+=4;
lum+=4;
dst+=4;
}
#endif
}
static void deinterlace_line_inplace(UINT8 *lum_m4, UINT8 *lum_m3, UINT8 *lum_m2, UINT8 *lum_m1, UINT8 *lum,
int size)
{
#ifndef HAVE_MMX
UINT8 *cm = cropTbl + MAX_NEG_CROP;
int sum;
for(;size > 0;size--) {
sum = -lum_m4[0];
sum += lum_m3[0] << 2;
sum += lum_m2[0] << 1;
lum_m4[0]=lum_m2[0];
sum += lum_m1[0] << 2;
sum += -lum[0];
lum_m2[0] = cm[(sum + 4) >> 3];
lum_m4++;
lum_m3++;
lum_m2++;
lum_m1++;
lum++;
}
#else
for (;size > 3; size-=4) {
DEINT_INPLACE_LINE_LUM
lum_m4+=4;
lum_m3+=4;
lum_m2+=4;
lum_m1+=4;
lum+=4;
}
#endif
}
/* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The
top field is copied as is, but the bottom field is deinterlaced
against the top field. */
static void deinterlace_bottom_field(UINT8 *dst, int dst_wrap,
UINT8 *src1, int src_wrap,
int width, int height)
UINT8 *src1, int src_wrap,
int width, int height)
{
UINT8 *src, *ptr;
int y, y1, i;
UINT8 *buf;
buf = (UINT8*)av_malloc(5 * width);
src = src1;
for(y=0;y<height;y+=2) {
/* copy top field line */
memcpy(dst, src, width);
UINT8 *src_m2, *src_m1, *src_0, *src_p1, *src_p2;
int y;
src_m2 = src1;
src_m1 = src1;
src_0=&src_m1[src_wrap];
src_p1=&src_0[src_wrap];
src_p2=&src_p1[src_wrap];
for(y=0;y<(height-2);y+=2) {
memcpy(dst,src_m1,width);
dst += dst_wrap;
src += (1 - 2) * src_wrap;
y1 = y - 2;
if (y1 >= 0 && (y1 + 4) < height) {
/* fast case : no edges */
deinterlace_line(dst, src, src_wrap, width);
} else {
/* in order to use the same function, we use an intermediate buffer */
ptr = buf;
for(i=0;i<5;i++) {
if (y1 < 0)
memcpy(ptr, src1, width);
else if (y1 >= height)
memcpy(ptr, src1 + (height - 1) * src_wrap, width);
else
memcpy(ptr, src1 + y1 * src_wrap, width);
y1++;
ptr += width;
}
deinterlace_line(dst, buf, width, width);
}
deinterlace_line(dst,src_m2,src_m1,src_0,src_p1,src_p2,width);
src_m2 = src_0;
src_m1 = src_p1;
src_0 = src_p2;
src_p1 += 2*src_wrap;
src_p2 += 2*src_wrap;
dst += dst_wrap;
src += (2 + 1) * src_wrap;
}
memcpy(dst,src_m1,width);
dst += dst_wrap;
/* do last line */
deinterlace_line(dst,src_m2,src_m1,src_0,src_0,src_0,width);
}
static void deinterlace_bottom_field_inplace(UINT8 *src1, int src_wrap,
int width, int height)
{
UINT8 *src_m1, *src_0, *src_p1, *src_p2;
int y;
UINT8 *buf;
buf = (UINT8*)av_malloc(width);
src_m1 = src1;
memcpy(buf,src_m1,width);
src_0=&src_m1[src_wrap];
src_p1=&src_0[src_wrap];
src_p2=&src_p1[src_wrap];
for(y=0;y<(height-2);y+=2) {
deinterlace_line_inplace(buf,src_m1,src_0,src_p1,src_p2,width);
src_m1 = src_p1;
src_0 = src_p2;
src_p1 += 2*src_wrap;
src_p2 += 2*src_wrap;
}
/* do last line */
deinterlace_line_inplace(buf,src_m1,src_0,src_0,src_0,width);
av_free(buf);
}
/* deinterlace, return -1 if format not handled */
/* deinterlace - if not supported return -1 */
int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
int pix_fmt, int width, int height)
{
@ -842,8 +951,21 @@ int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
pix_fmt != PIX_FMT_YUV422P &&
pix_fmt != PIX_FMT_YUV444P)
return -1;
if ((width & 1) != 0 || (height & 3) != 0)
if ((width & 3) != 0 || (height & 3) != 0)
return -1;
#ifdef HAVE_MMX
{
mmx_t rounder;
rounder.uw[0]=4;
rounder.uw[1]=4;
rounder.uw[2]=4;
rounder.uw[3]=4;
pxor_r2r(mm7,mm7);
movq_m2r(rounder,mm6);
}
#endif
for(i=0;i<3;i++) {
if (i == 1) {
@ -859,10 +981,18 @@ int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
break;
}
}
deinterlace_bottom_field(dst->data[i], dst->linesize[i],
src->data[i], src->linesize[i],
if (src == dst) {
deinterlace_bottom_field_inplace(src->data[i], src->linesize[i],
width, height);
} else {
deinterlace_bottom_field(dst->data[i],dst->linesize[i],
src->data[i], src->linesize[i],
width, height);
}
}
#ifdef HAVE_MMX
emms();
#endif
return 0;
}

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