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/*
Copyright (C) 2002 Michael Niedermayer <michaelni@gmx.at>
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
*/
#undef SPREADW
#undef PMAXW
#ifdef HAVE_MMX2
#define SPREADW(a) "pshufw $0, " #a ", " #a " \n\t"
#define PMAXW(a,b) "pmaxsw " #a ", " #b " \n\t"
#else
#define SPREADW(a) \
"punpcklwd " #a ", " #a " \n\t"\
"punpcklwd " #a ", " #a " \n\t"
#define PMAXW(a,b) \
"psubusw " #a ", " #b " \n\t"\
"paddw " #a ", " #b " \n\t"
#endif
static int RENAME(dct_quantize)(MpegEncContext *s,
DCTELEM *block, int n,
int qscale)
{
int i, level, last_non_zero_p1, q;
const UINT16 *qmat;
static __align8 INT16 temp_block[64];
int minLevel, maxLevel;
if(s->avctx!=NULL && s->avctx->codec->id==CODEC_ID_MPEG4){
/* mpeg4 */
minLevel= -2048;
maxLevel= 2047;
}else if(s->out_format==FMT_MPEG1){
/* mpeg1 */
minLevel= -255;
maxLevel= 255;
}else{
/* h263 / msmpeg4 */
minLevel= -128;
maxLevel= 127;
}
av_fdct (block);
if (s->mb_intra) {
int dummy;
if (n < 4)
q = s->y_dc_scale;
else
q = s->c_dc_scale;
/* note: block[0] is assumed to be positive */
#if 1
asm volatile (
"xorl %%edx, %%edx \n\t"
"mul %%ebx \n\t"
: "=d" (temp_block[0]), "=a"(dummy)
: "a" (block[0] + (q >> 1)), "b" (inverse[q])
);
#else
asm volatile (
"xorl %%edx, %%edx \n\t"
"divw %%bx \n\t"
"movzwl %%ax, %%eax \n\t"
: "=a" (temp_block[0])
: "a" (block[0] + (q >> 1)), "b" (q)
: "%edx"
);
#endif
// temp_block[0] = (block[0] + (q >> 1)) / q;
i = 1;
last_non_zero_p1 = 1;
if (s->out_format == FMT_H263) {
qmat = s->q_non_intra_matrix16;
} else {
qmat = s->q_intra_matrix16;
}
for(i=1;i<4;i++) {
level = block[i] * qmat[i];
level = level / (1 << (QMAT_SHIFT_MMX - 3));
/* XXX: currently, this code is not optimal. the range should be:
mpeg1: -255..255
mpeg2: -2048..2047
h263: -128..127
mpeg4: -2048..2047
*/
if (level > maxLevel)
level = maxLevel;
else if (level < minLevel)
level = minLevel;
temp_block[i] = level;
if(level)
if(last_non_zero_p1 < inv_zigzag_direct16[i]) last_non_zero_p1= inv_zigzag_direct16[i];
block[i]=0;
}
} else {
i = 0;
last_non_zero_p1 = 0;
qmat = s->q_non_intra_matrix16;
}
asm volatile( /* XXX: small rounding bug, but it shouldnt matter */
"movd %3, %%mm3 \n\t"
SPREADW(%%mm3)
"movd %4, %%mm4 \n\t"
SPREADW(%%mm4)
"movd %5, %%mm5 \n\t"
SPREADW(%%mm5)
"pxor %%mm7, %%mm7 \n\t"
"movd %%eax, %%mm2 \n\t"
SPREADW(%%mm2)
"movl %6, %%eax \n\t"
".balign 16 \n\t"
"1: \n\t"
"movq (%1, %%eax), %%mm0 \n\t"
"movq (%2, %%eax), %%mm1 \n\t"
"movq %%mm0, %%mm6 \n\t"
"psraw $15, %%mm6 \n\t"
"pmulhw %%mm0, %%mm1 \n\t"
"psubsw %%mm6, %%mm1 \n\t"
#ifdef HAVE_MMX2
"pminsw %%mm3, %%mm1 \n\t"
"pmaxsw %%mm4, %%mm1 \n\t"
#else
"paddsw %%mm3, %%mm1 \n\t"
"psubusw %%mm4, %%mm1 \n\t"
"paddsw %%mm5, %%mm1 \n\t"
#endif
"movq %%mm1, (%8, %%eax) \n\t"
"pcmpeqw %%mm7, %%mm1 \n\t"
"movq (%7, %%eax), %%mm0 \n\t"
"movq %%mm7, (%1, %%eax) \n\t"
"pandn %%mm0, %%mm1 \n\t"
PMAXW(%%mm1, %%mm2)
"addl $8, %%eax \n\t"
" js 1b \n\t"
"movq %%mm2, %%mm0 \n\t"
"psrlq $32, %%mm2 \n\t"
PMAXW(%%mm0, %%mm2)
"movq %%mm2, %%mm0 \n\t"
"psrlq $16, %%mm2 \n\t"
PMAXW(%%mm0, %%mm2)
"movd %%mm2, %%eax \n\t"
"movzbl %%al, %%eax \n\t"
: "+a" (last_non_zero_p1)
: "r" (block+64), "r" (qmat+64),
#ifdef HAVE_MMX2
"m" (maxLevel), "m" (minLevel), "m" (0 /* dummy */), "g" (2*i - 128),
#else
"m" (0x7FFF - maxLevel), "m" (0x7FFF -maxLevel + minLevel), "m" (minLevel), "g" (2*i - 128),
#endif
"r" (inv_zigzag_direct16+64), "r" (temp_block+64)
);
// last_non_zero_p1=64;
/* permute for IDCT */
asm volatile(
"movl %0, %%eax \n\t"
"pushl %%ebp \n\t"
"movl %%esp, " MANGLE(esp_temp) "\n\t"
"1: \n\t"
"movzbl (%1, %%eax), %%ebx \n\t"
"movzbl 1(%1, %%eax), %%ebp \n\t"
"movw (%2, %%ebx, 2), %%cx \n\t"
"movw (%2, %%ebp, 2), %%sp \n\t"
"movzbl " MANGLE(permutation) "(%%ebx), %%ebx\n\t"
"movzbl " MANGLE(permutation) "(%%ebp), %%ebp\n\t"
"movw %%cx, (%3, %%ebx, 2) \n\t"
"movw %%sp, (%3, %%ebp, 2) \n\t"
"addl $2, %%eax \n\t"
" js 1b \n\t"
"movl " MANGLE(esp_temp) ", %%esp\n\t"
"popl %%ebp \n\t"
:
: "g" (-last_non_zero_p1), "d" (zigzag_direct_noperm+last_non_zero_p1), "S" (temp_block), "D" (block)
: "%eax", "%ebx", "%ecx"
);
/*
for(i=0; i<last_non_zero_p1; i++)
{
int j= zigzag_direct_noperm[i];
block[block_permute_op(j)]= temp_block[j];
}
*/
//block_permute(block);
return last_non_zero_p1 - 1;
}
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