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Altivec Patch (Mark III) by (Dieter Shirley <dieters at schemasoft dot com>)

Browse Source 
Originally committed as revision 1147 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2002-11-02 11:28:08 +00:00
parent 26b35efb3a
commit 05c4072b45
10 changed files with 993 additions and 13 deletions
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4
libavcodec/Makefile
View File

@ -75,7 +75,7 @@ CFLAGS += -fforce-addr -freduce-all-givs
endif
ifeq ($(TARGET_ARCH_POWERPC),yes)
OBJS += ppc/dsputil_ppc.o
OBJS += ppc/dsputil_ppc.o ppc/mpegvideo_ppc.o
endif
ifeq ($(TARGET_MMI),yes)
@ -84,7 +84,7 @@ endif
ifeq ($(TARGET_ALTIVEC),yes)
CFLAGS += -faltivec
OBJS += ppc/dsputil_altivec.o
OBJS += ppc/dsputil_altivec.o ppc/mpegvideo_altivec.o ppc/idct_altivec.o
endif
SRCS := $(OBJS:.o=.c) $(ASM_OBJS:.o=.S)

2
libavcodec/avcodec.h
View File

@ -650,6 +650,7 @@ typedef struct AVCodecContext {
#define FF_DCT_INT 2
#define FF_DCT_MMX 3
#define FF_DCT_MLIB 4
#define FF_DCT_ALTIVEC 5
/**
* presentation timestamp in micro seconds (time when frame should be shown to user)
@ -716,6 +717,7 @@ typedef struct AVCodecContext {
#define FF_IDCT_PS2 5
#define FF_IDCT_MLIB 6
#define FF_IDCT_ARM 7
#define FF_IDCT_ALTIVEC 8
/**
* slice count

8
libavcodec/mpegvideo.c
View File

@ -157,6 +157,9 @@ void ff_init_scantable(MpegEncContext *s, ScanTable *st, const UINT8 *src_scanta
int j;
j = src_scantable[i];
st->permutated[i] = s->idct_permutation[j];
#ifdef ARCH_POWERPC
st->inverse[j] = i;
#endif
}
end=-1;
@ -221,6 +224,9 @@ int DCT_common_init(MpegEncContext *s)
#ifdef ARCH_ARMV4L
MPV_common_init_armv4l();
#endif
#ifdef ARCH_POWERPC
MPV_common_init_ppc(s);
#endif
switch(s->idct_permutation_type){
case FF_NO_IDCT_PERM:
@ -3011,7 +3017,7 @@ static int dct_quantize_c(MpegEncContext *s,
int bias;
int max=0;
unsigned int threshold1, threshold2;
s->fdct (block);
if (s->mb_intra) {

13
libavcodec/mpegvideo.h
View File

@ -103,6 +103,10 @@ typedef struct ScanTable{
const UINT8 *scantable;
UINT8 permutated[64];
UINT8 raster_end[64];
#ifdef ARCH_POWERPC
/* Used by dct_quantise_alitvec to find last-non-zero */
UINT8 __align8 inverse[64];
#endif
} ScanTable;
typedef struct MpegEncContext {
@ -287,8 +291,8 @@ typedef struct MpegEncContext {
int min_qcoeff; /* minimum encodable coefficient */
int max_qcoeff; /* maximum encodable coefficient */
/* precomputed matrix (combine qscale and DCT renorm) */
int q_intra_matrix[32][64];
int q_inter_matrix[32][64];
int __align8 q_intra_matrix[32][64];
int __align8 q_inter_matrix[32][64];
/* identical to the above but for MMX & these are not permutated */
UINT16 __align8 q_intra_matrix16[32][64];
UINT16 __align8 q_inter_matrix16[32][64];
@ -296,7 +300,7 @@ typedef struct MpegEncContext {
UINT16 __align8 q_inter_matrix16_bias[32][64];
int block_last_index[6]; /* last non zero coefficient in block */
/* scantables */
ScanTable intra_scantable;
ScanTable __align8 intra_scantable;
ScanTable intra_h_scantable;
ScanTable intra_v_scantable;
ScanTable inter_scantable; // if inter == intra then intra should be used to reduce tha cache usage
@ -535,6 +539,9 @@ void MPV_common_init_mlib(MpegEncContext *s);
#ifdef HAVE_MMI
void MPV_common_init_mmi(MpegEncContext *s);
#endif
#ifdef ARCH_POWERPC
void MPV_common_init_ppc(MpegEncContext *s);
#endif
extern void (*draw_edges)(UINT8 *buf, int wrap, int width, int height, int w);
void ff_conceal_past_errors(MpegEncContext *s, int conceal_all);
void ff_copy_bits(PutBitContext *pb, UINT8 *src, int length);

126
libavcodec/ppc/dsputil_altivec.c
View File

@ -1,15 +1,29 @@
/*
* Copyright (c) 2002 Brian Foley
* Copyright (c) 2002 Dieter Shirley
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "../dsputil.h"
#include "dsputil_altivec.h"
#if CONFIG_DARWIN
#include <sys/sysctl.h>
#endif
int pix_abs16x16_altivec(uint8_t *pix1, uint8_t *pix2, int line_size);
int pix_abs8x8_altivec(uint8_t *pix1, uint8_t *pix2, int line_size);
int pix_sum_altivec(UINT8 * pix, int line_size);
int has_altivec(void);
int pix_abs16x16_altivec(uint8_t *pix1, uint8_t *pix2, int line_size)
{
int i, s;
@ -127,6 +141,105 @@ int pix_sum_altivec(UINT8 * pix, int line_size)
return s;
}
void get_pixels_altivec(DCTELEM *restrict block, const UINT8 *pixels, int line_size)
{
int i;
vector unsigned char perm, bytes, *pixv;
vector unsigned char zero = (vector unsigned char) (0);
vector signed short shorts;
for(i=0;i<8;i++)
{
// Read potentially unaligned pixels.
// We're reading 16 pixels, and actually only want 8,
// but we simply ignore the extras.
perm = vec_lvsl(0, pixels);
pixv = (vector unsigned char *) pixels;
bytes = vec_perm(pixv[0], pixv[1], perm);
// convert the bytes into shorts
shorts = (vector signed short)vec_mergeh(zero, bytes);
// save the data to the block, we assume the block is 16-byte aligned
vec_st(shorts, i*16, (vector signed short*)block);
pixels += line_size;
}
}
void diff_pixels_altivec(DCTELEM *restrict block, const UINT8 *s1,
const UINT8 *s2, int stride)
{
int i;
vector unsigned char perm, bytes, *pixv;
vector unsigned char zero = (vector unsigned char) (0);
vector signed short shorts1, shorts2;
for(i=0;i<4;i++)
{
// Read potentially unaligned pixels
// We're reading 16 pixels, and actually only want 8,
// but we simply ignore the extras.
perm = vec_lvsl(0, s1);
pixv = (vector unsigned char *) s1;
bytes = vec_perm(pixv[0], pixv[1], perm);
// convert the bytes into shorts
shorts1 = (vector signed short)vec_mergeh(zero, bytes);
// Do the same for the second block of pixels
perm = vec_lvsl(0, s2);
pixv = (vector unsigned char *) s2;
bytes = vec_perm(pixv[0], pixv[1], perm);
// convert the bytes into shorts
shorts2 = (vector signed short)vec_mergeh(zero, bytes);
// Do the subtraction
shorts1 = vec_sub(shorts1, shorts2);
// save the data to the block, we assume the block is 16-byte aligned
vec_st(shorts1, 0, (vector signed short*)block);
s1 += stride;
s2 += stride;
block += 8;
// The code below is a copy of the code above... This is a manual
// unroll.
// Read potentially unaligned pixels
// We're reading 16 pixels, and actually only want 8,
// but we simply ignore the extras.
perm = vec_lvsl(0, s1);
pixv = (vector unsigned char *) s1;
bytes = vec_perm(pixv[0], pixv[1], perm);
// convert the bytes into shorts
shorts1 = (vector signed short)vec_mergeh(zero, bytes);
// Do the same for the second block of pixels
perm = vec_lvsl(0, s2);
pixv = (vector unsigned char *) s2;
bytes = vec_perm(pixv[0], pixv[1], perm);
// convert the bytes into shorts
shorts2 = (vector signed short)vec_mergeh(zero, bytes);
// Do the subtraction
shorts1 = vec_sub(shorts1, shorts2);
// save the data to the block, we assume the block is 16-byte aligned
vec_st(shorts1, 0, (vector signed short*)block);
s1 += stride;
s2 += stride;
block += 8;
}
}
int has_altivec(void)
{
#if CONFIG_DARWIN
@ -141,3 +254,4 @@ int has_altivec(void)
#endif
return 0;
}

21
libavcodec/ppc/dsputil_altivec.h
View File

@ -1,5 +1,26 @@
/*
* Copyright (c) 2002 Brian Foley
* Copyright (c) 2002 Dieter Shirley
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
extern int pix_abs16x16_altivec(uint8_t *pix1, uint8_t *pix2, int line_size);
extern int pix_abs8x8_altivec(uint8_t *pix1, uint8_t *pix2, int line_size);
extern int pix_sum_altivec(UINT8 * pix, int line_size);
extern void diff_pixels_altivec(DCTELEM* block, const UINT8* s1, const UINT8* s2, int stride);
extern void get_pixels_altivec(DCTELEM* block, const UINT8 * pixels, int line_size);
extern int has_altivec(void);

30
libavcodec/ppc/dsputil_ppc.c
View File

@ -1,3 +1,22 @@
/*
* Copyright (c) 2002 Brian Foley
* Copyright (c) 2002 Dieter Shirley
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "../dsputil.h"
#ifdef HAVE_ALTIVEC
@ -6,14 +25,23 @@
void dsputil_init_ppc(void)
{
// Common optimisations whether Altivec or not
// ... pending ...
#if HAVE_ALTIVEC
if (has_altivec()) {
// Altivec specific optimisations
pix_abs16x16 = pix_abs16x16_altivec;
pix_abs8x8 = pix_abs8x8_altivec;
pix_sum = pix_sum_altivec;
diff_pixels = diff_pixels_altivec;
get_pixels = get_pixels_altivec;
} else
#endif
{
/* Non-AltiVec PPC optimisations here */
// Non-AltiVec PPC optimisations
// ... pending ...
}
}

216
libavcodec/ppc/idct_altivec.c Normal file
View File

@ -0,0 +1,216 @@
/*
* Copyright (c) 2001 Michel Lespinasse
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/*
* NOTE: This code is based on GPL code from the libmpeg2 project. The
* author, Michel Lespinasses, has given explicit permission to release
* under LGPL as part of ffmpeg.
*
*/
/*
* FFMpeg integration by Dieter Shirley
*
* This file is a direct copy of the altivec idct module from the libmpeg2
* project. I've deleted all of the libmpeg2 specific code, renamed the functions and
* re-ordered the function parameters. The only change to the IDCT function
* itself was to factor out the partial transposition, and to perform a full
* transpose at the end of the function.
*/
#include <stdlib.h> /* malloc(), free() */
#include <string.h>
#include "../dsputil.h"
#define vector_s16_t vector signed short
#define vector_u16_t vector unsigned short
#define vector_s8_t vector signed char
#define vector_u8_t vector unsigned char
#define vector_s32_t vector signed int
#define vector_u32_t vector unsigned int
#define IDCT_HALF \
/* 1st stage */ \
t1 = vec_mradds (a1, vx7, vx1 ); \
t8 = vec_mradds (a1, vx1, vec_subs (zero, vx7)); \
t7 = vec_mradds (a2, vx5, vx3); \
t3 = vec_mradds (ma2, vx3, vx5); \
\
/* 2nd stage */ \
t5 = vec_adds (vx0, vx4); \
t0 = vec_subs (vx0, vx4); \
t2 = vec_mradds (a0, vx6, vx2); \
t4 = vec_mradds (a0, vx2, vec_subs (zero, vx6)); \
t6 = vec_adds (t8, t3); \
t3 = vec_subs (t8, t3); \
t8 = vec_subs (t1, t7); \
t1 = vec_adds (t1, t7); \
\
/* 3rd stage */ \
t7 = vec_adds (t5, t2); \
t2 = vec_subs (t5, t2); \
t5 = vec_adds (t0, t4); \
t0 = vec_subs (t0, t4); \
t4 = vec_subs (t8, t3); \
t3 = vec_adds (t8, t3); \
\
/* 4th stage */ \
vy0 = vec_adds (t7, t1); \
vy7 = vec_subs (t7, t1); \
vy1 = vec_mradds (c4, t3, t5); \
vy6 = vec_mradds (mc4, t3, t5); \
vy2 = vec_mradds (c4, t4, t0); \
vy5 = vec_mradds (mc4, t4, t0); \
vy3 = vec_adds (t2, t6); \
vy4 = vec_subs (t2, t6);
#define IDCT \
vector_s16_t vx0, vx1, vx2, vx3, vx4, vx5, vx6, vx7; \
vector_s16_t vy0, vy1, vy2, vy3, vy4, vy5, vy6, vy7; \
vector_s16_t a0, a1, a2, ma2, c4, mc4, zero, bias; \
vector_s16_t t0, t1, t2, t3, t4, t5, t6, t7, t8; \
vector_u16_t shift; \
\
c4 = vec_splat (constants[0], 0); \
a0 = vec_splat (constants[0], 1); \
a1 = vec_splat (constants[0], 2); \
a2 = vec_splat (constants[0], 3); \
mc4 = vec_splat (constants[0], 4); \
ma2 = vec_splat (constants[0], 5); \
bias = (vector_s16_t)vec_splat ((vector_s32_t)constants[0], 3); \
\
zero = vec_splat_s16 (0); \
shift = vec_splat_u16 (4); \
\
vx0 = vec_mradds (vec_sl (block[0], shift), constants[1], zero); \
vx1 = vec_mradds (vec_sl (block[1], shift), constants[2], zero); \
vx2 = vec_mradds (vec_sl (block[2], shift), constants[3], zero); \
vx3 = vec_mradds (vec_sl (block[3], shift), constants[4], zero); \
vx4 = vec_mradds (vec_sl (block[4], shift), constants[1], zero); \
vx5 = vec_mradds (vec_sl (block[5], shift), constants[4], zero); \
vx6 = vec_mradds (vec_sl (block[6], shift), constants[3], zero); \
vx7 = vec_mradds (vec_sl (block[7], shift), constants[2], zero); \
\
IDCT_HALF \
\
vx0 = vec_mergeh (vy0, vy4); \
vx1 = vec_mergel (vy0, vy4); \
vx2 = vec_mergeh (vy1, vy5); \
vx3 = vec_mergel (vy1, vy5); \
vx4 = vec_mergeh (vy2, vy6); \
vx5 = vec_mergel (vy2, vy6); \
vx6 = vec_mergeh (vy3, vy7); \
vx7 = vec_mergel (vy3, vy7); \
\
vy0 = vec_mergeh (vx0, vx4); \
vy1 = vec_mergel (vx0, vx4); \
vy2 = vec_mergeh (vx1, vx5); \
vy3 = vec_mergel (vx1, vx5); \
vy4 = vec_mergeh (vx2, vx6); \
vy5 = vec_mergel (vx2, vx6); \
vy6 = vec_mergeh (vx3, vx7); \
vy7 = vec_mergel (vx3, vx7); \
\
vx0 = vec_adds (vec_mergeh (vy0, vy4), bias); \
vx1 = vec_mergel (vy0, vy4); \
vx2 = vec_mergeh (vy1, vy5); \
vx3 = vec_mergel (vy1, vy5); \
vx4 = vec_mergeh (vy2, vy6); \
vx5 = vec_mergel (vy2, vy6); \
vx6 = vec_mergeh (vy3, vy7); \
vx7 = vec_mergel (vy3, vy7); \
\
IDCT_HALF \
\
shift = vec_splat_u16 (6); \
vx0 = vec_sra (vy0, shift); \
vx1 = vec_sra (vy1, shift); \
vx2 = vec_sra (vy2, shift); \
vx3 = vec_sra (vy3, shift); \
vx4 = vec_sra (vy4, shift); \
vx5 = vec_sra (vy5, shift); \
vx6 = vec_sra (vy6, shift); \
vx7 = vec_sra (vy7, shift);
static const vector_s16_t constants[5] = {
(vector_s16_t)(23170, 13573, 6518, 21895, -23170, -21895, 32, 31),
(vector_s16_t)(16384, 22725, 21407, 19266, 16384, 19266, 21407, 22725),
(vector_s16_t)(22725, 31521, 29692, 26722, 22725, 26722, 29692, 31521),
(vector_s16_t)(21407, 29692, 27969, 25172, 21407, 25172, 27969, 29692),
(vector_s16_t)(19266, 26722, 25172, 22654, 19266, 22654, 25172, 26722)
};
void idct_put_altivec(uint8_t* dest, int stride, vector_s16_t* block)
{
vector_u8_t tmp;
IDCT
#define COPY(dest,src) \
tmp = vec_packsu (src, src); \
vec_ste ((vector_u32_t)tmp, 0, (unsigned int *)dest); \
vec_ste ((vector_u32_t)tmp, 4, (unsigned int *)dest);
COPY (dest, vx0) dest += stride;
COPY (dest, vx1) dest += stride;
COPY (dest, vx2) dest += stride;
COPY (dest, vx3) dest += stride;
COPY (dest, vx4) dest += stride;
COPY (dest, vx5) dest += stride;
COPY (dest, vx6) dest += stride;
COPY (dest, vx7)
}
void idct_add_altivec(uint8_t* dest, int stride, vector_s16_t* block)
{
vector_u8_t tmp;
vector_s16_t tmp2, tmp3;
vector_u8_t perm0;
vector_u8_t perm1;
vector_u8_t p0, p1, p;
IDCT
p0 = vec_lvsl (0, dest);
p1 = vec_lvsl (stride, dest);
p = vec_splat_u8 (-1);
perm0 = vec_mergeh (p, p0);
perm1 = vec_mergeh (p, p1);
#define ADD(dest,src,perm) \
/* *(uint64_t *)&tmp = *(uint64_t *)dest; */ \
tmp = vec_ld (0, dest); \
tmp2 = (vector_s16_t)vec_perm (tmp, (vector_u8_t)zero, perm); \
tmp3 = vec_adds (tmp2, src); \
tmp = vec_packsu (tmp3, tmp3); \
vec_ste ((vector_u32_t)tmp, 0, (unsigned int *)dest); \
vec_ste ((vector_u32_t)tmp, 4, (unsigned int *)dest);
ADD (dest, vx0, perm0) dest += stride;
ADD (dest, vx1, perm1) dest += stride;
ADD (dest, vx2, perm0) dest += stride;
ADD (dest, vx3, perm1) dest += stride;
ADD (dest, vx4, perm0) dest += stride;
ADD (dest, vx5, perm1) dest += stride;
ADD (dest, vx6, perm0) dest += stride;
ADD (dest, vx7, perm1)
}

509
libavcodec/ppc/mpegvideo_altivec.c Normal file
View File

@ -0,0 +1,509 @@
/*
* Copyright (c) 2002 Dieter Shirley
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <stdio.h>
#include "../dsputil.h"
#include "../mpegvideo.h"
// Used when initializing constant vectors
#define FOUR_INSTANCES(x) x,x,x,x
// Swaps two variables (used for altivec registers)
#define SWAP(a,b) \
do { \
__typeof__(a) swap_temp=a; \
a=b; \
b=swap_temp; \
} while (0)
// transposes a matrix consisting of four vectors with four elements each
#define TRANSPOSE4(a,b,c,d) \
do { \
__typeof__(a) _trans_ach = vec_mergeh(a, c); \
__typeof__(a) _trans_acl = vec_mergel(a, c); \
__typeof__(a) _trans_bdh = vec_mergeh(b, d); \
__typeof__(a) _trans_bdl = vec_mergel(b, d); \
\
a = vec_mergeh(_trans_ach, _trans_bdh); \
b = vec_mergel(_trans_ach, _trans_bdh); \
c = vec_mergeh(_trans_acl, _trans_bdl); \
d = vec_mergel(_trans_acl, _trans_bdl); \
} while (0)
#define TRANSPOSE8(a,b,c,d,e,f,g,h) \
do { \
__typeof__(a) _A1, _B1, _C1, _D1, _E1, _F1, _G1, _H1; \
__typeof__(a) _A2, _B2, _C2, _D2, _E2, _F2, _G2, _H2; \
\
_A1 = vec_mergeh (a, e); \
_B1 = vec_mergel (a, e); \
_C1 = vec_mergeh (b, f); \
_D1 = vec_mergel (b, f); \
_E1 = vec_mergeh (c, g); \
_F1 = vec_mergel (c, g); \
_G1 = vec_mergeh (d, h); \
_H1 = vec_mergel (d, h); \
\
_A2 = vec_mergeh (_A1, _E1); \
_B2 = vec_mergel (_A1, _E1); \
_C2 = vec_mergeh (_B1, _F1); \
_D2 = vec_mergel (_B1, _F1); \
_E2 = vec_mergeh (_C1, _G1); \
_F2 = vec_mergel (_C1, _G1); \
_G2 = vec_mergeh (_D1, _H1); \
_H2 = vec_mergel (_D1, _H1); \
\
a = vec_mergeh (_A2, _E2); \
b = vec_mergel (_A2, _E2); \
c = vec_mergeh (_B2, _F2); \
d = vec_mergel (_B2, _F2); \
e = vec_mergeh (_C2, _G2); \
f = vec_mergel (_C2, _G2); \
g = vec_mergeh (_D2, _H2); \
h = vec_mergel (_D2, _H2); \
} while (0)
// Loads a four-byte value (int or float) from the target address
// into every element in the target vector. Only works if the
// target address is four-byte aligned (which should be always).
#define LOAD4(vec, address) \
{ \
__typeof__(vec)* _load_addr = (__typeof__(vec)*)(address); \
vector unsigned char _perm_vec = vec_lvsl(0,(address)); \
vec = vec_ld(0, _load_addr); \
vec = vec_perm(vec, vec, _perm_vec); \
vec = vec_splat(vec, 0); \
}
int dct_quantize_altivec(MpegEncContext* s,
DCTELEM* data, int n,
int qscale, int* overflow)
{
int lastNonZero;
vector float row0, row1, row2, row3, row4, row5, row6, row7;
vector float alt0, alt1, alt2, alt3, alt4, alt5, alt6, alt7;
const vector float zero = {FOUR_INSTANCES(0.0f)};
// Load the data into the row/alt vectors
{
vector signed short data0, data1, data2, data3, data4, data5, data6, data7;
data0 = vec_ld(0, data);
data1 = vec_ld(16, data);
data2 = vec_ld(32, data);
data3 = vec_ld(48, data);
data4 = vec_ld(64, data);
data5 = vec_ld(80, data);
data6 = vec_ld(96, data);
data7 = vec_ld(112, data);
// Transpose the data before we start
TRANSPOSE8(data0, data1, data2, data3, data4, data5, data6, data7);
// load the data into floating point vectors. We load
// the high half of each row into the main row vectors
// and the low half into the alt vectors.
row0 = vec_ctf(vec_unpackh(data0), 0);
alt0 = vec_ctf(vec_unpackl(data0), 0);
row1 = vec_ctf(vec_unpackh(data1), 0);
alt1 = vec_ctf(vec_unpackl(data1), 0);
row2 = vec_ctf(vec_unpackh(data2), 0);
alt2 = vec_ctf(vec_unpackl(data2), 0);
row3 = vec_ctf(vec_unpackh(data3), 0);
alt3 = vec_ctf(vec_unpackl(data3), 0);
row4 = vec_ctf(vec_unpackh(data4), 0);
alt4 = vec_ctf(vec_unpackl(data4), 0);
row5 = vec_ctf(vec_unpackh(data5), 0);
alt5 = vec_ctf(vec_unpackl(data5), 0);
row6 = vec_ctf(vec_unpackh(data6), 0);
alt6 = vec_ctf(vec_unpackl(data6), 0);
row7 = vec_ctf(vec_unpackh(data7), 0);
alt7 = vec_ctf(vec_unpackl(data7), 0);
}
// The following block could exist as a separate an altivec dct
// function. However, if we put it inline, the DCT data can remain
// in the vector local variables, as floats, which we'll use during the
// quantize step...
{
const vector float vec_0_298631336 = {FOUR_INSTANCES(0.298631336f)};
const vector float vec_0_390180644 = {FOUR_INSTANCES(-0.390180644f)};
const vector float vec_0_541196100 = {FOUR_INSTANCES(0.541196100f)};
const vector float vec_0_765366865 = {FOUR_INSTANCES(0.765366865f)};
const vector float vec_0_899976223 = {FOUR_INSTANCES(-0.899976223f)};
const vector float vec_1_175875602 = {FOUR_INSTANCES(1.175875602f)};
const vector float vec_1_501321110 = {FOUR_INSTANCES(1.501321110f)};
const vector float vec_1_847759065 = {FOUR_INSTANCES(-1.847759065f)};
const vector float vec_1_961570560 = {FOUR_INSTANCES(-1.961570560f)};
const vector float vec_2_053119869 = {FOUR_INSTANCES(2.053119869f)};
const vector float vec_2_562915447 = {FOUR_INSTANCES(-2.562915447f)};
const vector float vec_3_072711026 = {FOUR_INSTANCES(3.072711026f)};
int whichPass, whichHalf;
for(whichPass = 1; whichPass<=2; whichPass++)
{
for(whichHalf = 1; whichHalf<=2; whichHalf++)
{
vector float tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
vector float tmp10, tmp11, tmp12, tmp13;
vector float z1, z2, z3, z4, z5;
tmp0 = vec_add(row0, row7); // tmp0 = dataptr[0] + dataptr[7];
tmp7 = vec_sub(row0, row7); // tmp7 = dataptr[0] - dataptr[7];
tmp3 = vec_add(row3, row4); // tmp3 = dataptr[3] + dataptr[4];
tmp4 = vec_sub(row3, row4); // tmp4 = dataptr[3] - dataptr[4];
tmp1 = vec_add(row1, row6); // tmp1 = dataptr[1] + dataptr[6];
tmp6 = vec_sub(row1, row6); // tmp6 = dataptr[1] - dataptr[6];
tmp2 = vec_add(row2, row5); // tmp2 = dataptr[2] + dataptr[5];
tmp5 = vec_sub(row2, row5); // tmp5 = dataptr[2] - dataptr[5];
tmp10 = vec_add(tmp0, tmp3); // tmp10 = tmp0 + tmp3;
tmp13 = vec_sub(tmp0, tmp3); // tmp13 = tmp0 - tmp3;
tmp11 = vec_add(tmp1, tmp2); // tmp11 = tmp1 + tmp2;
tmp12 = vec_sub(tmp1, tmp2); // tmp12 = tmp1 - tmp2;
// dataptr[0] = (DCTELEM) ((tmp10 + tmp11) << PASS1_BITS);
row0 = vec_add(tmp10, tmp11);
// dataptr[4] = (DCTELEM) ((tmp10 - tmp11) << PASS1_BITS);
row4 = vec_sub(tmp10, tmp11);
// z1 = MULTIPLY(tmp12 + tmp13, FIX_0_541196100);
z1 = vec_madd(vec_add(tmp12, tmp13), vec_0_541196100, (vector float)zero);
// dataptr[2] = (DCTELEM) DESCALE(z1 + MULTIPLY(tmp13, FIX_0_765366865),
// CONST_BITS-PASS1_BITS);
row2 = vec_madd(tmp13, vec_0_765366865, z1);
// dataptr[6] = (DCTELEM) DESCALE(z1 + MULTIPLY(tmp12, - FIX_1_847759065),
// CONST_BITS-PASS1_BITS);
row6 = vec_madd(tmp12, vec_1_847759065, z1);
z1 = vec_add(tmp4, tmp7); // z1 = tmp4 + tmp7;
z2 = vec_add(tmp5, tmp6); // z2 = tmp5 + tmp6;
z3 = vec_add(tmp4, tmp6); // z3 = tmp4 + tmp6;
z4 = vec_add(tmp5, tmp7); // z4 = tmp5 + tmp7;
// z5 = MULTIPLY(z3 + z4, FIX_1_175875602); /* sqrt(2) * c3 */
z5 = vec_madd(vec_add(z3, z4), vec_1_175875602, (vector float)zero);
// z3 = MULTIPLY(z3, - FIX_1_961570560); /* sqrt(2) * (-c3-c5) */
z3 = vec_madd(z3, vec_1_961570560, z5);
// z4 = MULTIPLY(z4, - FIX_0_390180644); /* sqrt(2) * (c5-c3) */
z4 = vec_madd(z4, vec_0_390180644, z5);
// The following adds are rolled into the multiplies above
// z3 = vec_add(z3, z5); // z3 += z5;
// z4 = vec_add(z4, z5); // z4 += z5;
// z2 = MULTIPLY(z2, - FIX_2_562915447); /* sqrt(2) * (-c1-c3) */
// Wow! It's actually more effecient to roll this multiply
// into the adds below, even thought the multiply gets done twice!
// z2 = vec_madd(z2, vec_2_562915447, (vector float)zero);
// z1 = MULTIPLY(z1, - FIX_0_899976223); /* sqrt(2) * (c7-c3) */
// Same with this one...
// z1 = vec_madd(z1, vec_0_899976223, (vector float)zero);
// tmp4 = MULTIPLY(tmp4, FIX_0_298631336); /* sqrt(2) * (-c1+c3+c5-c7) */
// dataptr[7] = (DCTELEM) DESCALE(tmp4 + z1 + z3, CONST_BITS-PASS1_BITS);
row7 = vec_madd(tmp4, vec_0_298631336, vec_madd(z1, vec_0_899976223, z3));
// tmp5 = MULTIPLY(tmp5, FIX_2_053119869); /* sqrt(2) * ( c1+c3-c5+c7) */
// dataptr[5] = (DCTELEM) DESCALE(tmp5 + z2 + z4, CONST_BITS-PASS1_BITS);
row5 = vec_madd(tmp5, vec_2_053119869, vec_madd(z2, vec_2_562915447, z4));
// tmp6 = MULTIPLY(tmp6, FIX_3_072711026); /* sqrt(2) * ( c1+c3+c5-c7) */
// dataptr[3] = (DCTELEM) DESCALE(tmp6 + z2 + z3, CONST_BITS-PASS1_BITS);
row3 = vec_madd(tmp6, vec_3_072711026, vec_madd(z2, vec_2_562915447, z3));
// tmp7 = MULTIPLY(tmp7, FIX_1_501321110); /* sqrt(2) * ( c1+c3-c5-c7) */
// dataptr[1] = (DCTELEM) DESCALE(tmp7 + z1 + z4, CONST_BITS-PASS1_BITS);
row1 = vec_madd(z1, vec_0_899976223, vec_madd(tmp7, vec_1_501321110, z4));
// Swap the row values with the alts. If this is the first half,
// this sets up the low values to be acted on in the second half.
// If this is the second half, it puts the high values back in
// the row values where they are expected to be when we're done.
SWAP(row0, alt0);
SWAP(row1, alt1);
SWAP(row2, alt2);
SWAP(row3, alt3);
SWAP(row4, alt4);
SWAP(row5, alt5);
SWAP(row6, alt6);
SWAP(row7, alt7);
}
if (whichPass == 1)
{
// transpose the data for the second pass
// First, block transpose the upper right with lower left.
SWAP(row4, alt0);
SWAP(row5, alt1);
SWAP(row6, alt2);
SWAP(row7, alt3);
// Now, transpose each block of four
TRANSPOSE4(row0, row1, row2, row3);
TRANSPOSE4(row4, row5, row6, row7);
TRANSPOSE4(alt0, alt1, alt2, alt3);
TRANSPOSE4(alt4, alt5, alt6, alt7);
}
}
}
// used after quantise step
int oldBaseValue = 0;
// perform the quantise step, using the floating point data
// still in the row/alt registers
{
const int* biasAddr;
const vector signed int* qmat;
vector float bias, negBias;
if (s->mb_intra)
{
vector signed int baseVector;
// We must cache element 0 in the intra case
// (it needs special handling).
baseVector = vec_cts(vec_splat(row0, 0), 0);
vec_ste(baseVector, 0, &oldBaseValue);
qmat = (vector signed int*)s->q_intra_matrix[qscale];
biasAddr = &(s->intra_quant_bias);
}
else
{
qmat = (vector signed int*)s->q_inter_matrix[qscale];
biasAddr = &(s->inter_quant_bias);
}
// Load the bias vector (We add 0.5 to the bias so that we're
// rounding when we convert to int, instead of flooring.)
{
vector signed int biasInt;
const vector float negOneFloat = (vector float)(FOUR_INSTANCES(-1.0f));
LOAD4(biasInt, biasAddr);
bias = vec_ctf(biasInt, QUANT_BIAS_SHIFT);
negBias = vec_madd(bias, negOneFloat, zero);
}
{
vector float q0, q1, q2, q3, q4, q5, q6, q7;
q0 = vec_ctf(qmat[0], QMAT_SHIFT);
q1 = vec_ctf(qmat[2], QMAT_SHIFT);
q2 = vec_ctf(qmat[4], QMAT_SHIFT);
q3 = vec_ctf(qmat[6], QMAT_SHIFT);
q4 = vec_ctf(qmat[8], QMAT_SHIFT);
q5 = vec_ctf(qmat[10], QMAT_SHIFT);
q6 = vec_ctf(qmat[12], QMAT_SHIFT);
q7 = vec_ctf(qmat[14], QMAT_SHIFT);
row0 = vec_sel(vec_madd(row0, q0, negBias), vec_madd(row0, q0, bias),
vec_cmpgt(row0, zero));
row1 = vec_sel(vec_madd(row1, q1, negBias), vec_madd(row1, q1, bias),
vec_cmpgt(row1, zero));
row2 = vec_sel(vec_madd(row2, q2, negBias), vec_madd(row2, q2, bias),
vec_cmpgt(row2, zero));
row3 = vec_sel(vec_madd(row3, q3, negBias), vec_madd(row3, q3, bias),
vec_cmpgt(row3, zero));
row4 = vec_sel(vec_madd(row4, q4, negBias), vec_madd(row4, q4, bias),
vec_cmpgt(row4, zero));
row5 = vec_sel(vec_madd(row5, q5, negBias), vec_madd(row5, q5, bias),
vec_cmpgt(row5, zero));
row6 = vec_sel(vec_madd(row6, q6, negBias), vec_madd(row6, q6, bias),
vec_cmpgt(row6, zero));
row7 = vec_sel(vec_madd(row7, q7, negBias), vec_madd(row7, q7, bias),
vec_cmpgt(row7, zero));
q0 = vec_ctf(qmat[1], QMAT_SHIFT);
q1 = vec_ctf(qmat[3], QMAT_SHIFT);
q2 = vec_ctf(qmat[5], QMAT_SHIFT);
q3 = vec_ctf(qmat[7], QMAT_SHIFT);
q4 = vec_ctf(qmat[9], QMAT_SHIFT);
q5 = vec_ctf(qmat[11], QMAT_SHIFT);
q6 = vec_ctf(qmat[13], QMAT_SHIFT);
q7 = vec_ctf(qmat[15], QMAT_SHIFT);
alt0 = vec_sel(vec_madd(alt0, q0, negBias), vec_madd(alt0, q0, bias),
vec_cmpgt(alt0, zero));
alt1 = vec_sel(vec_madd(alt1, q1, negBias), vec_madd(alt1, q1, bias),
vec_cmpgt(alt1, zero));
alt2 = vec_sel(vec_madd(alt2, q2, negBias), vec_madd(alt2, q2, bias),
vec_cmpgt(alt2, zero));
alt3 = vec_sel(vec_madd(alt3, q3, negBias), vec_madd(alt3, q3, bias),
vec_cmpgt(alt3, zero));
alt4 = vec_sel(vec_madd(alt4, q4, negBias), vec_madd(alt4, q4, bias),
vec_cmpgt(alt4, zero));
alt5 = vec_sel(vec_madd(alt5, q5, negBias), vec_madd(alt5, q5, bias),
vec_cmpgt(alt5, zero));
alt6 = vec_sel(vec_madd(alt6, q6, negBias), vec_madd(alt6, q6, bias),
vec_cmpgt(alt6, zero));
alt7 = vec_sel(vec_madd(alt7, q7, negBias), vec_madd(alt7, q7, bias),
vec_cmpgt(alt7, zero));
}
}
// Store the data back into the original block
{
vector signed short data0, data1, data2, data3, data4, data5, data6, data7;
data0 = vec_pack(vec_cts(row0, 0), vec_cts(alt0, 0));
data1 = vec_pack(vec_cts(row1, 0), vec_cts(alt1, 0));
data2 = vec_pack(vec_cts(row2, 0), vec_cts(alt2, 0));
data3 = vec_pack(vec_cts(row3, 0), vec_cts(alt3, 0));
data4 = vec_pack(vec_cts(row4, 0), vec_cts(alt4, 0));
data5 = vec_pack(vec_cts(row5, 0), vec_cts(alt5, 0));
data6 = vec_pack(vec_cts(row6, 0), vec_cts(alt6, 0));
data7 = vec_pack(vec_cts(row7, 0), vec_cts(alt7, 0));
{
// Clamp for overflow
vector signed int max_q_int, min_q_int;
vector signed short max_q, min_q;
LOAD4(max_q_int, &(s->max_qcoeff));
LOAD4(min_q_int, &(s->min_qcoeff));
max_q = vec_pack(max_q_int, max_q_int);
min_q = vec_pack(min_q_int, min_q_int);
data0 = vec_max(vec_min(data0, max_q), min_q);
data1 = vec_max(vec_min(data1, max_q), min_q);
data2 = vec_max(vec_min(data2, max_q), min_q);
data4 = vec_max(vec_min(data4, max_q), min_q);
data5 = vec_max(vec_min(data5, max_q), min_q);
data6 = vec_max(vec_min(data6, max_q), min_q);
data7 = vec_max(vec_min(data7, max_q), min_q);
}
vector bool char zero_01, zero_23, zero_45, zero_67;
vector signed char scanIndices_01, scanIndices_23, scanIndices_45, scanIndices_67;
vector signed char negOne = vec_splat_s8(-1);
vector signed char* scanPtr =
(vector signed char*)(s->intra_scantable.inverse);
// Determine the largest non-zero index.
zero_01 = vec_pack(vec_cmpeq(data0, (vector short)zero),
vec_cmpeq(data1, (vector short)zero));
zero_23 = vec_pack(vec_cmpeq(data2, (vector short)zero),
vec_cmpeq(data3, (vector short)zero));
zero_45 = vec_pack(vec_cmpeq(data4, (vector short)zero),
vec_cmpeq(data5, (vector short)zero));
zero_67 = vec_pack(vec_cmpeq(data6, (vector short)zero),
vec_cmpeq(data7, (vector short)zero));
// 64 biggest values
scanIndices_01 = vec_sel(scanPtr[0], negOne, zero_01);
scanIndices_23 = vec_sel(scanPtr[1], negOne, zero_23);
scanIndices_45 = vec_sel(scanPtr[2], negOne, zero_45);
scanIndices_67 = vec_sel(scanPtr[3], negOne, zero_67);
// 32 largest values
scanIndices_01 = vec_max(scanIndices_01, scanIndices_23);
scanIndices_45 = vec_max(scanIndices_45, scanIndices_67);
// 16 largest values
scanIndices_01 = vec_max(scanIndices_01, scanIndices_45);
// 8 largest values
scanIndices_01 = vec_max(vec_mergeh(scanIndices_01, negOne),
vec_mergel(scanIndices_01, negOne));
// 4 largest values
scanIndices_01 = vec_max(vec_mergeh(scanIndices_01, negOne),
vec_mergel(scanIndices_01, negOne));
// 2 largest values
scanIndices_01 = vec_max(vec_mergeh(scanIndices_01, negOne),
vec_mergel(scanIndices_01, negOne));
// largest value
scanIndices_01 = vec_max(vec_mergeh(scanIndices_01, negOne),
vec_mergel(scanIndices_01, negOne));
scanIndices_01 = vec_splat(scanIndices_01, 0);
signed char lastNonZeroChar;
vec_ste(scanIndices_01, 0, &lastNonZeroChar);
lastNonZero = lastNonZeroChar;
// While the data is still in vectors we check for the transpose IDCT permute
// and handle it using the vector unit if we can. This is the permute used
// by the altivec idct, so it is common when using the altivec dct.
if ((lastNonZero > 0) && (s->idct_permutation_type == FF_TRANSPOSE_IDCT_PERM))
{
TRANSPOSE8(data0, data1, data2, data3, data4, data5, data6, data7);
}
vec_st(data0, 0, data);
vec_st(data1, 16, data);
vec_st(data2, 32, data);
vec_st(data3, 48, data);
vec_st(data4, 64, data);
vec_st(data5, 80, data);
vec_st(data6, 96, data);
vec_st(data7, 112, data);
}
// special handling of block[0]
if (s->mb_intra)
{
if (!s->h263_aic)
{
if (n < 4)
oldBaseValue /= s->y_dc_scale;
else
oldBaseValue /= s->c_dc_scale;
}
// Divide by 8, rounding the result
data[0] = (oldBaseValue + 4) >> 3;
}
// We handled the tranpose permutation above and we don't
// need to permute the "no" permutation case.
if ((lastNonZero > 0) &&
(s->idct_permutation_type != FF_TRANSPOSE_IDCT_PERM) &&
(s->idct_permutation_type != FF_NO_IDCT_PERM))
{
ff_block_permute(data, s->idct_permutation,
s->intra_scantable.scantable, lastNonZero);
}
return lastNonZero;
}

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/*
* Copyright (c) 2002 Dieter Shirley
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <time.h>
#include "../../config.h"
#include "../dsputil.h"
#include "../mpegvideo.h"
#ifdef HAVE_ALTIVEC
#include "dsputil_altivec.h"
#endif
extern int dct_quantize_altivec(MpegEncContext *s,
DCTELEM *block, int n,
int qscale, int *overflow);
extern void idct_put_altivec(UINT8 *dest, int line_size, INT16 *block);
extern void idct_add_altivec(UINT8 *dest, int line_size, INT16 *block);
void MPV_common_init_ppc(MpegEncContext *s)
{
#if HAVE_ALTIVEC
if (has_altivec())
{
if ((s->avctx->idct_algo == FF_IDCT_AUTO) ||
(s->avctx->idct_algo == FF_IDCT_ALTIVEC))
{
s->idct_put = idct_put_altivec;
s->idct_add = idct_add_altivec;
s->idct_permutation_type = FF_TRANSPOSE_IDCT_PERM;
}
// Test to make sure that the dct required alignments are met.
if ((((long)(s->q_intra_matrix) & 0x0f) != 0) ||
(((long)(s->q_inter_matrix) & 0x0f) != 0))
{
fprintf(stderr, "Internal Error: q-matrix blocks must be 16-byte aligned "
"to use Altivec DCT. Reverting to non-altivec version.\n");
return;
}
if (((long)(s->intra_scantable.inverse) & 0x0f) != 0)
{
fprintf(stderr, "Internal Error: scan table blocks must be 16-byte aligned "
"to use Altivec DCT. Reverting to non-altivec version.\n");
return;
}
if ((s->avctx->dct_algo == FF_DCT_AUTO) ||
(s->avctx->dct_algo == FF_DCT_ALTIVEC))
{
s->dct_quantize = dct_quantize_altivec;
}
} else
#endif
{
/* Non-AltiVec PPC optimisations here */
}
}