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;/************************************************************************** |
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; * |
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; * XVID MPEG-4 VIDEO CODEC |
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; * mmx interlacing decision |
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; * |
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; * This program is an implementation of a part of one or more MPEG-4 |
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; * Video tools as specified in ISO/IEC 14496-2 standard. Those intending |
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; * to use this software module in hardware or software products are |
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; * advised that its use may infringe existing patents or copyrights, and |
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; * any such use would be at such party's own risk. The original |
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; * developer of this software module and his/her company, and subsequent |
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; * editors and their companies, will have no liability for use of this |
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; * software or modifications or derivatives thereof. |
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; * |
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; * This program is free software; you can redistribute it and/or modify |
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; * it under the terms of the GNU General Public License as published by |
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; * the Free Software Foundation; either version 2 of the License, or |
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; * (at your option) any later version. |
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; * |
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; * This program 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 |
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; * GNU General Public License for more details. |
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; * |
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; * You should have received a copy of the GNU General Public License |
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; * along with this program; if not, write to the Free Software |
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; * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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; * |
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; *************************************************************************/ |
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;/************************************************************************** |
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; * |
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; * History: |
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; * |
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; * 04.09.2002 initial version; (c)2002 daniel smith |
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; * |
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; *************************************************************************/ |
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bits 32 |
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%macro cglobal 1 |
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%ifdef PREFIX |
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global _%1 |
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%define %1 _%1 |
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%else |
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global %1 |
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%endif |
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%endmacro |
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section .text |
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cglobal MBFieldTest_mmx |
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; advances to next block on right |
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align 16 |
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nexts dd 0, 0, 8, 120, 8 |
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|
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; multiply word sums into dwords |
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align 16 |
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ones times 4 dw 1 |
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|
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; neater |
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%define line0 esi |
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%define line1 esi+16 |
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%define line2 esi+32 |
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%define line3 esi+48 |
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%define line4 esi+64 |
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%define line5 esi+80 |
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%define line6 esi+96 |
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%define line7 esi+112 |
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%define line8 edi |
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%define line9 edi+16 |
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%define line10 edi+32 |
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%define line11 edi+48 |
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%define line12 edi+64 |
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%define line13 edi+80 |
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%define line14 edi+96 |
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%define line15 edi+112 |
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|
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; keep from losing track which reg holds which line - these never overlap |
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%define m00 mm0 |
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%define m01 mm1 |
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%define m02 mm2 |
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%define m03 mm0 |
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%define m04 mm1 |
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%define m05 mm2 |
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%define m06 mm0 |
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%define m07 mm1 |
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%define m08 mm2 |
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%define m09 mm0 |
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%define m10 mm1 |
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%define m11 mm2 |
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%define m12 mm0 |
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%define m13 mm1 |
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%define m14 mm2 |
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%define m15 mm0 |
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; gets diff between three lines low(%2),mid(%3),hi(%4): frame = mid-low, field = hi-low |
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%macro ABS8 4 |
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movq %4, [%1] ; m02 = hi |
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movq mm3, %2 ; mm3 = low copy |
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pxor mm4, mm4 ; mm4 = 0 |
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pxor mm5, mm5 ; mm5 = 0 |
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psubw %2, %3 ; diff(med,low) for frame |
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psubw mm3, %4 ; diff(hi,low) for field |
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pcmpgtw mm4, %2 ; if (diff<0), mm4 will be all 1's, else all 0's |
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pcmpgtw mm5, mm3 |
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pxor %2, mm4 ; this will get abs(), but off by 1 if (diff<0) |
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pxor mm3, mm5 |
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psubw %2, mm4 ; correct abs being off by 1 when (diff<0) |
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psubw mm3, mm5 |
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paddw mm6, %2 ; add to totals |
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paddw mm7, mm3 |
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%endmacro |
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section .text |
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;=========================================================================== |
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; |
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; uint32_t MBFieldTest_mmx(int16_t * const data); |
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; |
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;=========================================================================== |
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align 16 |
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MBFieldTest_mmx: |
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push esi |
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push edi |
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mov esi, [esp+8+4] ; esi = top left block |
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mov edi, esi |
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add edi, 256 ; edi = bottom left block |
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pxor mm6, mm6 ; frame total |
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pxor mm7, mm7 ; field total |
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mov eax, 4 ; we do left 8 bytes of data[0*64], then right 8 bytes |
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; then left 8 bytes of data[1*64], then last 8 bytes |
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_loop: |
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movq m00, [line0] ; line0 |
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movq m01, [line1] ; line1 |
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ABS8 line2, m00, m01, m02 ; frame += (line2-line1), field += (line2-line0) |
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ABS8 line3, m01, m02, m03 |
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ABS8 line4, m02, m03, m04 |
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ABS8 line5, m03, m04, m05 |
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ABS8 line6, m04, m05, m06 |
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ABS8 line7, m05, m06, m07 |
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ABS8 line8, m06, m07, m08 |
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movq m09, [line9] ; line9-line7, no frame comp for line9-line8! |
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pxor mm4, mm4 |
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psubw m07, m09 |
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pcmpgtw mm4, mm1 |
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pxor m07, mm4 |
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psubw m07, mm4 |
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paddw mm7, m07 ; add to field total |
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ABS8 line10, m08, m09, m10 ; frame += (line10-line9), field += (line10-line8) |
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ABS8 line11, m09, m10, m11 |
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ABS8 line12, m10, m11, m12 |
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ABS8 line13, m11, m12, m13 |
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ABS8 line14, m12, m13, m14 |
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ABS8 line15, m13, m14, m15 |
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pxor mm4, mm4 ; line15-line14, we're done with field comps! |
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psubw m14, m15 |
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pcmpgtw mm4, m14 |
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pxor m14, mm4 |
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psubw m14, mm4 |
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paddw mm6, m14 ; add to frame total |
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mov ecx, [nexts+eax*4] ; move esi/edi 8 pixels to the right |
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add esi, ecx |
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add edi, ecx |
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dec eax |
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jnz near _loop |
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_decide: |
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movq mm0, [ones] ; add packed words into single dwords |
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pmaddwd mm6, mm0 |
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pmaddwd mm7, mm0 |
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movq mm0, mm6 ; ecx will be frame total, edx field |
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movq mm1, mm7 |
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psrlq mm0, 32 |
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psrlq mm1, 32 |
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paddd mm0, mm6 |
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paddd mm1, mm7 |
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movd ecx, mm0 |
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movd edx, mm1 |
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add edx, 350 ; add bias against field decision |
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cmp ecx, edx |
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jb _end ; if frame<field, don't use field dct |
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inc eax ; if frame>=field, use field dct (return 1) |
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_end: |
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pop edi |
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pop esi |
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ret |
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