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360 lines
14 KiB
360 lines
14 KiB
/* |
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* Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg 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 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg 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 FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "../swscale_internal.h" |
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#include "libavutil/x86/asm.h" |
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#include "libavutil/x86/cpu.h" |
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#include "libavutil/mem_internal.h" |
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#define RET 0xC3 // near return opcode for x86 |
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#define PREFETCH "prefetchnta" |
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#if HAVE_INLINE_ASM |
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av_cold int ff_init_hscaler_mmxext(int dstW, int xInc, uint8_t *filterCode, |
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int16_t *filter, int32_t *filterPos, |
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int numSplits) |
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{ |
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uint8_t *fragmentA; |
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x86_reg imm8OfPShufW1A; |
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x86_reg imm8OfPShufW2A; |
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x86_reg fragmentLengthA; |
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uint8_t *fragmentB; |
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x86_reg imm8OfPShufW1B; |
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x86_reg imm8OfPShufW2B; |
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x86_reg fragmentLengthB; |
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int fragmentPos; |
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int xpos, i; |
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// create an optimized horizontal scaling routine |
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/* This scaler is made of runtime-generated MMXEXT code using specially tuned |
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* pshufw instructions. For every four output pixels, if four input pixels |
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* are enough for the fast bilinear scaling, then a chunk of fragmentB is |
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* used. If five input pixels are needed, then a chunk of fragmentA is used. |
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*/ |
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// code fragment |
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__asm__ volatile ( |
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"jmp 9f \n\t" |
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// Begin |
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"0: \n\t" |
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"movq (%%"FF_REG_d", %%"FF_REG_a"), %%mm3 \n\t" |
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"movd (%%"FF_REG_c", %%"FF_REG_S"), %%mm0 \n\t" |
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"movd 1(%%"FF_REG_c", %%"FF_REG_S"), %%mm1 \n\t" |
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"punpcklbw %%mm7, %%mm1 \n\t" |
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"punpcklbw %%mm7, %%mm0 \n\t" |
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"pshufw $0xFF, %%mm1, %%mm1 \n\t" |
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"1: \n\t" |
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"pshufw $0xFF, %%mm0, %%mm0 \n\t" |
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"2: \n\t" |
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"psubw %%mm1, %%mm0 \n\t" |
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"movl 8(%%"FF_REG_b", %%"FF_REG_a"), %%esi \n\t" |
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"pmullw %%mm3, %%mm0 \n\t" |
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"psllw $7, %%mm1 \n\t" |
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"paddw %%mm1, %%mm0 \n\t" |
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"movq %%mm0, (%%"FF_REG_D", %%"FF_REG_a") \n\t" |
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"add $8, %%"FF_REG_a" \n\t" |
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// End |
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"9: \n\t" |
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"lea " LOCAL_MANGLE(0b) ", %0 \n\t" |
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"lea " LOCAL_MANGLE(1b) ", %1 \n\t" |
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"lea " LOCAL_MANGLE(2b) ", %2 \n\t" |
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"dec %1 \n\t" |
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"dec %2 \n\t" |
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"sub %0, %1 \n\t" |
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"sub %0, %2 \n\t" |
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"lea " LOCAL_MANGLE(9b) ", %3 \n\t" |
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"sub %0, %3 \n\t" |
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: "=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A), |
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"=r" (fragmentLengthA) |
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); |
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__asm__ volatile ( |
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"jmp 9f \n\t" |
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// Begin |
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"0: \n\t" |
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"movq (%%"FF_REG_d", %%"FF_REG_a"), %%mm3 \n\t" |
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"movd (%%"FF_REG_c", %%"FF_REG_S"), %%mm0 \n\t" |
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"punpcklbw %%mm7, %%mm0 \n\t" |
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"pshufw $0xFF, %%mm0, %%mm1 \n\t" |
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"1: \n\t" |
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"pshufw $0xFF, %%mm0, %%mm0 \n\t" |
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"2: \n\t" |
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"psubw %%mm1, %%mm0 \n\t" |
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"movl 8(%%"FF_REG_b", %%"FF_REG_a"), %%esi \n\t" |
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"pmullw %%mm3, %%mm0 \n\t" |
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"psllw $7, %%mm1 \n\t" |
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"paddw %%mm1, %%mm0 \n\t" |
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"movq %%mm0, (%%"FF_REG_D", %%"FF_REG_a") \n\t" |
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"add $8, %%"FF_REG_a" \n\t" |
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// End |
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"9: \n\t" |
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"lea " LOCAL_MANGLE(0b) ", %0 \n\t" |
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"lea " LOCAL_MANGLE(1b) ", %1 \n\t" |
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"lea " LOCAL_MANGLE(2b) ", %2 \n\t" |
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"dec %1 \n\t" |
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"dec %2 \n\t" |
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"sub %0, %1 \n\t" |
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"sub %0, %2 \n\t" |
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"lea " LOCAL_MANGLE(9b) ", %3 \n\t" |
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"sub %0, %3 \n\t" |
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: "=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B), |
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"=r" (fragmentLengthB) |
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); |
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xpos = 0; // lumXInc/2 - 0x8000; // difference between pixel centers |
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fragmentPos = 0; |
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for (i = 0; i < dstW / numSplits; i++) { |
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int xx = xpos >> 16; |
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if ((i & 3) == 0) { |
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int a = 0; |
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int b = ((xpos + xInc) >> 16) - xx; |
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int c = ((xpos + xInc * 2) >> 16) - xx; |
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int d = ((xpos + xInc * 3) >> 16) - xx; |
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int inc = (d + 1 < 4); |
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uint8_t *fragment = inc ? fragmentB : fragmentA; |
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x86_reg imm8OfPShufW1 = inc ? imm8OfPShufW1B : imm8OfPShufW1A; |
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x86_reg imm8OfPShufW2 = inc ? imm8OfPShufW2B : imm8OfPShufW2A; |
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x86_reg fragmentLength = inc ? fragmentLengthB : fragmentLengthA; |
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int maxShift = 3 - (d + inc); |
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int shift = 0; |
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if (filterCode) { |
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filter[i] = ((xpos & 0xFFFF) ^ 0xFFFF) >> 9; |
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filter[i + 1] = (((xpos + xInc) & 0xFFFF) ^ 0xFFFF) >> 9; |
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filter[i + 2] = (((xpos + xInc * 2) & 0xFFFF) ^ 0xFFFF) >> 9; |
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filter[i + 3] = (((xpos + xInc * 3) & 0xFFFF) ^ 0xFFFF) >> 9; |
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filterPos[i / 2] = xx; |
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memcpy(filterCode + fragmentPos, fragment, fragmentLength); |
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filterCode[fragmentPos + imm8OfPShufW1] = (a + inc) | |
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((b + inc) << 2) | |
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((c + inc) << 4) | |
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((d + inc) << 6); |
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filterCode[fragmentPos + imm8OfPShufW2] = a | (b << 2) | |
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(c << 4) | |
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(d << 6); |
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if (i + 4 - inc >= dstW) |
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shift = maxShift; // avoid overread |
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else if ((filterPos[i / 2] & 3) <= maxShift) |
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shift = filterPos[i / 2] & 3; // align |
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if (shift && i >= shift) { |
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filterCode[fragmentPos + imm8OfPShufW1] += 0x55 * shift; |
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filterCode[fragmentPos + imm8OfPShufW2] += 0x55 * shift; |
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filterPos[i / 2] -= shift; |
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} |
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} |
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fragmentPos += fragmentLength; |
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if (filterCode) |
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filterCode[fragmentPos] = RET; |
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} |
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xpos += xInc; |
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} |
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if (filterCode) |
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filterPos[((i / 2) + 1) & (~1)] = xpos >> 16; // needed to jump to the next part |
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return fragmentPos + 1; |
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} |
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void ff_hyscale_fast_mmxext(SwsContext *c, int16_t *dst, |
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int dstWidth, const uint8_t *src, |
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int srcW, int xInc) |
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{ |
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int32_t *filterPos = c->hLumFilterPos; |
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int16_t *filter = c->hLumFilter; |
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void *mmxextFilterCode = c->lumMmxextFilterCode; |
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int i; |
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#if ARCH_X86_64 |
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uint64_t retsave; |
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#else |
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#if !HAVE_EBX_AVAILABLE |
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uint64_t ebxsave; |
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#endif |
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#endif |
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__asm__ volatile( |
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#if ARCH_X86_64 |
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"mov -8(%%rsp), %%"FF_REG_a" \n\t" |
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"mov %%"FF_REG_a", %5 \n\t" // retsave |
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#else |
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#if !HAVE_EBX_AVAILABLE |
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"mov %%"FF_REG_b", %5 \n\t" // ebxsave |
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#endif |
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#endif |
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"pxor %%mm7, %%mm7 \n\t" |
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"mov %0, %%"FF_REG_c" \n\t" |
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"mov %1, %%"FF_REG_D" \n\t" |
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"mov %2, %%"FF_REG_d" \n\t" |
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"mov %3, %%"FF_REG_b" \n\t" |
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"xor %%"FF_REG_a", %%"FF_REG_a" \n\t" // i |
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PREFETCH" (%%"FF_REG_c") \n\t" |
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PREFETCH" 32(%%"FF_REG_c") \n\t" |
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PREFETCH" 64(%%"FF_REG_c") \n\t" |
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#if ARCH_X86_64 |
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#define CALL_MMXEXT_FILTER_CODE \ |
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"movl (%%"FF_REG_b"), %%esi \n\t"\ |
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"call *%4 \n\t"\ |
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"movl (%%"FF_REG_b", %%"FF_REG_a"), %%esi \n\t"\ |
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"add %%"FF_REG_S", %%"FF_REG_c" \n\t"\ |
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"add %%"FF_REG_a", %%"FF_REG_D" \n\t"\ |
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"xor %%"FF_REG_a", %%"FF_REG_a" \n\t"\ |
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#else |
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#define CALL_MMXEXT_FILTER_CODE \ |
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"movl (%%"FF_REG_b"), %%esi \n\t"\ |
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"call *%4 \n\t"\ |
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"addl (%%"FF_REG_b", %%"FF_REG_a"), %%"FF_REG_c" \n\t"\ |
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"add %%"FF_REG_a", %%"FF_REG_D" \n\t"\ |
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"xor %%"FF_REG_a", %%"FF_REG_a" \n\t"\ |
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#endif /* ARCH_X86_64 */ |
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CALL_MMXEXT_FILTER_CODE |
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CALL_MMXEXT_FILTER_CODE |
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CALL_MMXEXT_FILTER_CODE |
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CALL_MMXEXT_FILTER_CODE |
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CALL_MMXEXT_FILTER_CODE |
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CALL_MMXEXT_FILTER_CODE |
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CALL_MMXEXT_FILTER_CODE |
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CALL_MMXEXT_FILTER_CODE |
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#if ARCH_X86_64 |
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"mov %5, %%"FF_REG_a" \n\t" |
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"mov %%"FF_REG_a", -8(%%rsp) \n\t" |
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#else |
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#if !HAVE_EBX_AVAILABLE |
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"mov %5, %%"FF_REG_b" \n\t" |
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#endif |
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#endif |
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:: "m" (src), "m" (dst), "m" (filter), "m" (filterPos), |
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"m" (mmxextFilterCode) |
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#if ARCH_X86_64 |
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,"m"(retsave) |
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#else |
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#if !HAVE_EBX_AVAILABLE |
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,"m" (ebxsave) |
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#endif |
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#endif |
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: "%"FF_REG_a, "%"FF_REG_c, "%"FF_REG_d, "%"FF_REG_S, "%"FF_REG_D |
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#if ARCH_X86_64 || HAVE_EBX_AVAILABLE |
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,"%"FF_REG_b |
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#endif |
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); |
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for (i=dstWidth-1; (i*xInc)>>16 >=srcW-1; i--) |
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dst[i] = src[srcW-1]*128; |
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} |
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void ff_hcscale_fast_mmxext(SwsContext *c, int16_t *dst1, int16_t *dst2, |
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int dstWidth, const uint8_t *src1, |
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const uint8_t *src2, int srcW, int xInc) |
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{ |
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int32_t *filterPos = c->hChrFilterPos; |
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int16_t *filter = c->hChrFilter; |
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void *mmxextFilterCode = c->chrMmxextFilterCode; |
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int i; |
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#if ARCH_X86_64 |
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DECLARE_ALIGNED(8, uint64_t, retsave); |
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#else |
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#if !HAVE_EBX_AVAILABLE |
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DECLARE_ALIGNED(8, uint64_t, ebxsave); |
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#endif |
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#endif |
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__asm__ volatile( |
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#if ARCH_X86_64 |
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"mov -8(%%rsp), %%"FF_REG_a" \n\t" |
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"mov %%"FF_REG_a", %7 \n\t" // retsave |
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#else |
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#if !HAVE_EBX_AVAILABLE |
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"mov %%"FF_REG_b", %7 \n\t" // ebxsave |
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#endif |
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#endif |
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"pxor %%mm7, %%mm7 \n\t" |
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"mov %0, %%"FF_REG_c" \n\t" |
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"mov %1, %%"FF_REG_D" \n\t" |
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"mov %2, %%"FF_REG_d" \n\t" |
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"mov %3, %%"FF_REG_b" \n\t" |
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"xor %%"FF_REG_a", %%"FF_REG_a" \n\t" // i |
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PREFETCH" (%%"FF_REG_c") \n\t" |
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PREFETCH" 32(%%"FF_REG_c") \n\t" |
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PREFETCH" 64(%%"FF_REG_c") \n\t" |
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CALL_MMXEXT_FILTER_CODE |
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CALL_MMXEXT_FILTER_CODE |
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CALL_MMXEXT_FILTER_CODE |
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CALL_MMXEXT_FILTER_CODE |
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"xor %%"FF_REG_a", %%"FF_REG_a" \n\t" // i |
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"mov %5, %%"FF_REG_c" \n\t" // src2 |
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"mov %6, %%"FF_REG_D" \n\t" // dst2 |
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PREFETCH" (%%"FF_REG_c") \n\t" |
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PREFETCH" 32(%%"FF_REG_c") \n\t" |
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PREFETCH" 64(%%"FF_REG_c") \n\t" |
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CALL_MMXEXT_FILTER_CODE |
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CALL_MMXEXT_FILTER_CODE |
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CALL_MMXEXT_FILTER_CODE |
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CALL_MMXEXT_FILTER_CODE |
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#if ARCH_X86_64 |
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"mov %7, %%"FF_REG_a" \n\t" |
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"mov %%"FF_REG_a", -8(%%rsp) \n\t" |
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#else |
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#if !HAVE_EBX_AVAILABLE |
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"mov %7, %%"FF_REG_b" \n\t" |
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#endif |
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#endif |
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:: "m" (src1), "m" (dst1), "m" (filter), "m" (filterPos), |
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"m" (mmxextFilterCode), "m" (src2), "m"(dst2) |
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#if ARCH_X86_64 |
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,"m"(retsave) |
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#else |
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#if !HAVE_EBX_AVAILABLE |
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,"m" (ebxsave) |
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#endif |
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#endif |
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: "%"FF_REG_a, "%"FF_REG_c, "%"FF_REG_d, "%"FF_REG_S, "%"FF_REG_D |
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#if ARCH_X86_64 || HAVE_EBX_AVAILABLE |
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,"%"FF_REG_b |
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#endif |
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); |
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for (i=dstWidth-1; (i*xInc)>>16 >=srcW-1; i--) { |
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dst1[i] = src1[srcW-1]*128; |
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dst2[i] = src2[srcW-1]*128; |
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} |
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} |
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#endif //HAVE_INLINE_ASM
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