28db7fce02
per context DCT selection Originally committed as revision 878 to svn://svn.ffmpeg.org/ffmpeg/trunk
228 lines
8.0 KiB
C
228 lines
8.0 KiB
C
/*
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* MPEG video MMX templates
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*
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* Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#undef SPREADW
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#undef PMAXW
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#ifdef HAVE_MMX2
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#define SPREADW(a) "pshufw $0, " #a ", " #a " \n\t"
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#define PMAXW(a,b) "pmaxsw " #a ", " #b " \n\t"
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#else
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#define SPREADW(a) \
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"punpcklwd " #a ", " #a " \n\t"\
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"punpcklwd " #a ", " #a " \n\t"
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#define PMAXW(a,b) \
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"psubusw " #a ", " #b " \n\t"\
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"paddw " #a ", " #b " \n\t"
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#endif
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static int RENAME(dct_quantize)(MpegEncContext *s,
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DCTELEM *block, int n,
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int qscale, int *overflow)
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{
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int level=0, last_non_zero_p1, q; //=0 is cuz gcc says uninitalized ...
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const UINT16 *qmat, *bias;
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static __align8 INT16 temp_block[64];
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//s->fdct (block);
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fdct_mmx (block); //cant be anything else ...
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if (s->mb_intra) {
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int dummy;
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if (n < 4)
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q = s->y_dc_scale;
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else
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q = s->c_dc_scale;
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/* note: block[0] is assumed to be positive */
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if (!s->h263_aic) {
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#if 1
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asm volatile (
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"xorl %%edx, %%edx \n\t"
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"mul %%ecx \n\t"
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: "=d" (level), "=a"(dummy)
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: "a" (block[0] + (q >> 1)), "c" (inverse[q])
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);
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#else
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asm volatile (
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"xorl %%edx, %%edx \n\t"
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"divw %%cx \n\t"
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"movzwl %%ax, %%eax \n\t"
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: "=a" (level)
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: "a" (block[0] + (q >> 1)), "c" (q)
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: "%edx"
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);
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#endif
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} else
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/* For AIC we skip quant/dequant of INTRADC */
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level = block[0];
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block[0]=0; //avoid fake overflow
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// temp_block[0] = (block[0] + (q >> 1)) / q;
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last_non_zero_p1 = 1;
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bias = s->q_intra_matrix16_bias[qscale];
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qmat = s->q_intra_matrix16[qscale];
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} else {
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last_non_zero_p1 = 0;
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bias = s->q_inter_matrix16_bias[qscale];
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qmat = s->q_inter_matrix16[qscale];
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}
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if(s->out_format == FMT_H263 && s->mpeg_quant==0){
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asm volatile(
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"movd %%eax, %%mm3 \n\t" // last_non_zero_p1
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SPREADW(%%mm3)
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"pxor %%mm7, %%mm7 \n\t" // 0
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"pxor %%mm4, %%mm4 \n\t" // 0
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"movq (%2), %%mm5 \n\t" // qmat[0]
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"pxor %%mm6, %%mm6 \n\t"
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"psubw (%3), %%mm6 \n\t" // -bias[0]
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"movl $-128, %%eax \n\t"
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".balign 16 \n\t"
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"1: \n\t"
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"pxor %%mm1, %%mm1 \n\t" // 0
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"movq (%1, %%eax), %%mm0 \n\t" // block[i]
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"pcmpgtw %%mm0, %%mm1 \n\t" // block[i] <= 0 ? 0xFF : 0x00
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"pxor %%mm1, %%mm0 \n\t"
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"psubw %%mm1, %%mm0 \n\t" // ABS(block[i])
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"psubusw %%mm6, %%mm0 \n\t" // ABS(block[i]) + bias[0]
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"pmulhw %%mm5, %%mm0 \n\t" // (ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16
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"por %%mm0, %%mm4 \n\t"
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"pxor %%mm1, %%mm0 \n\t"
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"psubw %%mm1, %%mm0 \n\t" // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])
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"movq %%mm0, (%5, %%eax) \n\t"
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"pcmpeqw %%mm7, %%mm0 \n\t" // out==0 ? 0xFF : 0x00
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"movq (%4, %%eax), %%mm1 \n\t"
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"movq %%mm7, (%1, %%eax) \n\t" // 0
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"pandn %%mm1, %%mm0 \n\t"
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PMAXW(%%mm0, %%mm3)
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"addl $8, %%eax \n\t"
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" js 1b \n\t"
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"movq %%mm3, %%mm0 \n\t"
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"psrlq $32, %%mm3 \n\t"
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PMAXW(%%mm0, %%mm3)
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"movq %%mm3, %%mm0 \n\t"
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"psrlq $16, %%mm3 \n\t"
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PMAXW(%%mm0, %%mm3)
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"movd %%mm3, %%eax \n\t"
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"movzbl %%al, %%eax \n\t" // last_non_zero_p1
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: "+a" (last_non_zero_p1)
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: "r" (block+64), "r" (qmat), "r" (bias),
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"r" (inv_zigzag_direct16+64), "r" (temp_block+64)
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);
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// note the asm is split cuz gcc doesnt like that many operands ...
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asm volatile(
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"movd %1, %%mm1 \n\t" // max_qcoeff
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SPREADW(%%mm1)
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"psubusw %%mm1, %%mm4 \n\t"
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"packuswb %%mm4, %%mm4 \n\t"
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"movd %%mm4, %0 \n\t" // *overflow
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: "=g" (*overflow)
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: "g" (s->max_qcoeff)
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);
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}else{ // FMT_H263
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asm volatile(
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"movd %%eax, %%mm3 \n\t" // last_non_zero_p1
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SPREADW(%%mm3)
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"pxor %%mm7, %%mm7 \n\t" // 0
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"pxor %%mm4, %%mm4 \n\t" // 0
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"movl $-128, %%eax \n\t"
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".balign 16 \n\t"
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"1: \n\t"
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"pxor %%mm1, %%mm1 \n\t" // 0
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"movq (%1, %%eax), %%mm0 \n\t" // block[i]
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"pcmpgtw %%mm0, %%mm1 \n\t" // block[i] <= 0 ? 0xFF : 0x00
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"pxor %%mm1, %%mm0 \n\t"
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"psubw %%mm1, %%mm0 \n\t" // ABS(block[i])
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"movq (%3, %%eax), %%mm6 \n\t" // bias[0]
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"paddusw %%mm6, %%mm0 \n\t" // ABS(block[i]) + bias[0]
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"movq (%2, %%eax), %%mm5 \n\t" // qmat[i]
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"pmulhw %%mm5, %%mm0 \n\t" // (ABS(block[i])*qmat[0] + bias[0]*qmat[0])>>16
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"por %%mm0, %%mm4 \n\t"
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"pxor %%mm1, %%mm0 \n\t"
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"psubw %%mm1, %%mm0 \n\t" // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])
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"movq %%mm0, (%5, %%eax) \n\t"
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"pcmpeqw %%mm7, %%mm0 \n\t" // out==0 ? 0xFF : 0x00
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"movq (%4, %%eax), %%mm1 \n\t"
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"movq %%mm7, (%1, %%eax) \n\t" // 0
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"pandn %%mm1, %%mm0 \n\t"
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PMAXW(%%mm0, %%mm3)
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"addl $8, %%eax \n\t"
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" js 1b \n\t"
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"movq %%mm3, %%mm0 \n\t"
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"psrlq $32, %%mm3 \n\t"
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PMAXW(%%mm0, %%mm3)
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"movq %%mm3, %%mm0 \n\t"
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"psrlq $16, %%mm3 \n\t"
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PMAXW(%%mm0, %%mm3)
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"movd %%mm3, %%eax \n\t"
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"movzbl %%al, %%eax \n\t" // last_non_zero_p1
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: "+a" (last_non_zero_p1)
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: "r" (block+64), "r" (qmat+64), "r" (bias+64),
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"r" (inv_zigzag_direct16+64), "r" (temp_block+64)
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);
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// note the asm is split cuz gcc doesnt like that many operands ...
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asm volatile(
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"movd %1, %%mm1 \n\t" // max_qcoeff
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SPREADW(%%mm1)
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"psubusw %%mm1, %%mm4 \n\t"
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"packuswb %%mm4, %%mm4 \n\t"
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"movd %%mm4, %0 \n\t" // *overflow
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: "=g" (*overflow)
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: "g" (s->max_qcoeff)
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);
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}
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if(s->mb_intra) temp_block[0]= level; //FIXME move afer permute
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// last_non_zero_p1=64;
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/* permute for IDCT */
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asm volatile(
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"movl %0, %%eax \n\t"
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"pushl %%ebp \n\t"
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"movl %%esp, " MANGLE(esp_temp) "\n\t"
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"1: \n\t"
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"movzbl (%1, %%eax), %%ebx \n\t"
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"movzbl 1(%1, %%eax), %%ebp \n\t"
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"movw (%2, %%ebx, 2), %%cx \n\t"
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"movw (%2, %%ebp, 2), %%sp \n\t"
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"movzbl " MANGLE(permutation) "(%%ebx), %%ebx\n\t"
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"movzbl " MANGLE(permutation) "(%%ebp), %%ebp\n\t"
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"movw %%cx, (%3, %%ebx, 2) \n\t"
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"movw %%sp, (%3, %%ebp, 2) \n\t"
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"addl $2, %%eax \n\t"
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" js 1b \n\t"
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"movl " MANGLE(esp_temp) ", %%esp\n\t"
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"popl %%ebp \n\t"
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:
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: "g" (-last_non_zero_p1), "d" (zigzag_direct_noperm+last_non_zero_p1), "S" (temp_block), "D" (block)
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: "%eax", "%ebx", "%ecx"
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);
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/*
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for(i=0; i<last_non_zero_p1; i++)
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{
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int j= zigzag_direct_noperm[i];
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block[block_permute_op(j)]= temp_block[j];
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}
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*/
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//block_permute(block);
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return last_non_zero_p1 - 1;
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}
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