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ffmpeg/libavcodec/x86/mpegvideoenc_template.c
Ramiro Polla b6f7271fa9 avcodec/x86/mpegvideoenc: remove av_assert2() for variable alignment 
It's safe to assume that LOCAL_ALIGNED_16 does indeed align. Otherwise
we would have many more problems...

This assert was added in f8188626 all the way back in 2003.
2024-09-03 17:06:19 +02:00

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/*
* MPEG video MMX templates
*
* Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg 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 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include "libavutil/internal.h"
#include "libavutil/mem_internal.h"
#include "libavutil/x86/asm.h"
#include "libavcodec/mpegutils.h"
#include "libavcodec/mpegvideo.h"
#include "fdct.h"
#undef MMREG_WIDTH
#undef MM
#undef MOVQ
#undef SPREADW
#undef PMAXW
#undef PMAX
#undef SAVE_SIGN
#undef RESTORE_SIGN
#if COMPILE_TEMPLATE_SSE2
#define MMREG_WIDTH "16"
#define MM "%%xmm"
#define MOVQ "movdqa"
#define SPREADW(a) \
"pshuflw $0, "a", "a" \n\t"\
"punpcklwd "a", "a" \n\t"
#define PMAXW(a,b) "pmaxsw "a", "b" \n\t"
#define PMAX(a,b) \
"movhlps "a", "b" \n\t"\
PMAXW(b, a)\
"pshuflw $0x0E, "a", "b" \n\t"\
PMAXW(b, a)\
"pshuflw $0x01, "a", "b" \n\t"\
PMAXW(b, a)
#else
#define MMREG_WIDTH "8"
#define MM "%%mm"
#define MOVQ "movq"
#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"
#define PMAX(a,b) \
"movq "a", "b" \n\t"\
"psrlq $32, "a" \n\t"\
PMAXW(b, a)\
"movq "a", "b" \n\t"\
"psrlq $16, "a" \n\t"\
PMAXW(b, a)
#endif
#if COMPILE_TEMPLATE_SSSE3
#define SAVE_SIGN(a,b) \
"movdqa "b", "a" \n\t"\
"pabsw "b", "b" \n\t"
#define RESTORE_SIGN(a,b) \
"psignw "a", "b" \n\t"
#else
#define SAVE_SIGN(a,b) \
"pxor "a", "a" \n\t"\
"pcmpgtw "b", "a" \n\t" /* block[i] <= 0 ? 0xFF : 0x00 */\
"pxor "a", "b" \n\t"\
"psubw "a", "b" \n\t" /* ABS(block[i]) */
#define RESTORE_SIGN(a,b) \
"pxor "a", "b" \n\t"\
"psubw "a", "b" \n\t" // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])
#endif
static int RENAME(dct_quantize)(MpegEncContext *s,
int16_t *block, int n,
int qscale, int *overflow)
{
x86_reg last_non_zero_p1;
int level=0, q; //=0 is because gcc says uninitialized ...
const uint16_t *qmat, *bias;
LOCAL_ALIGNED_16(int16_t, temp_block, [64]);
//s->fdct (block);
RENAME_FDCT(ff_fdct)(block); // cannot be anything else ...
if(s->dct_error_sum)
s->denoise_dct(s, block);
if (s->mb_intra) {
int dummy;
if (n < 4){
q = s->y_dc_scale;
bias = s->q_intra_matrix16[qscale][1];
qmat = s->q_intra_matrix16[qscale][0];
}else{
q = s->c_dc_scale;
bias = s->q_chroma_intra_matrix16[qscale][1];
qmat = s->q_chroma_intra_matrix16[qscale][0];
}
/* note: block[0] is assumed to be positive */
if (!s->h263_aic) {
__asm__ volatile (
"mul %%ecx \n\t"
: "=d" (level), "=a"(dummy)
: "a" ((block[0]>>2) + q), "c" (ff_inverse[q<<1])
);
} else
/* For AIC we skip quant/dequant of INTRADC */
level = (block[0] + 4)>>3;
block[0]=0; //avoid fake overflow
// temp_block[0] = (block[0] + (q >> 1)) / q;
last_non_zero_p1 = 1;
} else {
last_non_zero_p1 = 0;
bias = s->q_inter_matrix16[qscale][1];
qmat = s->q_inter_matrix16[qscale][0];
}
if((s->out_format == FMT_H263 || s->out_format == FMT_H261) && s->mpeg_quant==0){
__asm__ volatile(
"movd %%"FF_REG_a", "MM"3 \n\t" // last_non_zero_p1
SPREADW(MM"3")
"pxor "MM"7, "MM"7 \n\t" // 0
"pxor "MM"4, "MM"4 \n\t" // 0
MOVQ" (%2), "MM"5 \n\t" // qmat[0]
"pxor "MM"6, "MM"6 \n\t"
"psubw (%3), "MM"6 \n\t" // -bias[0]
"mov $-128, %%"FF_REG_a" \n\t"
".p2align 4 \n\t"
"1: \n\t"
MOVQ" (%1, %%"FF_REG_a"), "MM"0 \n\t" // block[i]
SAVE_SIGN(MM"1", MM"0") // ABS(block[i])
"psubusw "MM"6, "MM"0 \n\t" // ABS(block[i]) + bias[0]
"pmulhw "MM"5, "MM"0 \n\t" // (ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16
"por "MM"0, "MM"4 \n\t"
RESTORE_SIGN(MM"1", MM"0") // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])
MOVQ" "MM"0, (%5, %%"FF_REG_a") \n\t"
"pcmpeqw "MM"7, "MM"0 \n\t" // out==0 ? 0xFF : 0x00
MOVQ" (%4, %%"FF_REG_a"), "MM"1 \n\t"
MOVQ" "MM"7, (%1, %%"FF_REG_a") \n\t" // 0
"pandn "MM"1, "MM"0 \n\t"
PMAXW(MM"0", MM"3")
"add $"MMREG_WIDTH", %%"FF_REG_a" \n\t"
" js 1b \n\t"
PMAX(MM"3", MM"0")
"movd "MM"3, %%"FF_REG_a" \n\t"
"movzbl %%al, %%eax \n\t" // last_non_zero_p1
: "+a" (last_non_zero_p1)
: "r" (block+64), "r" (qmat), "r" (bias),
"r" (inv_zigzag_direct16 + 64), "r" (temp_block + 64)
XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm2", "%xmm3",
"%xmm4", "%xmm5", "%xmm6", "%xmm7")
);
}else{ // FMT_H263
__asm__ volatile(
"movd %%"FF_REG_a", "MM"3 \n\t" // last_non_zero_p1
SPREADW(MM"3")
"pxor "MM"7, "MM"7 \n\t" // 0
"pxor "MM"4, "MM"4 \n\t" // 0
"mov $-128, %%"FF_REG_a" \n\t"
".p2align 4 \n\t"
"1: \n\t"
MOVQ" (%1, %%"FF_REG_a"), "MM"0 \n\t" // block[i]
SAVE_SIGN(MM"1", MM"0") // ABS(block[i])
MOVQ" (%3, %%"FF_REG_a"), "MM"6 \n\t" // bias[0]
"paddusw "MM"6, "MM"0 \n\t" // ABS(block[i]) + bias[0]
MOVQ" (%2, %%"FF_REG_a"), "MM"5 \n\t" // qmat[i]
"pmulhw "MM"5, "MM"0 \n\t" // (ABS(block[i])*qmat[0] + bias[0]*qmat[0])>>16
"por "MM"0, "MM"4 \n\t"
RESTORE_SIGN(MM"1", MM"0") // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])
MOVQ" "MM"0, (%5, %%"FF_REG_a") \n\t"
"pcmpeqw "MM"7, "MM"0 \n\t" // out==0 ? 0xFF : 0x00
MOVQ" (%4, %%"FF_REG_a"), "MM"1 \n\t"
MOVQ" "MM"7, (%1, %%"FF_REG_a") \n\t" // 0
"pandn "MM"1, "MM"0 \n\t"
PMAXW(MM"0", MM"3")
"add $"MMREG_WIDTH", %%"FF_REG_a" \n\t"
" js 1b \n\t"
PMAX(MM"3", MM"0")
"movd "MM"3, %%"FF_REG_a" \n\t"
"movzbl %%al, %%eax \n\t" // last_non_zero_p1
: "+a" (last_non_zero_p1)
: "r" (block+64), "r" (qmat+64), "r" (bias+64),
"r" (inv_zigzag_direct16 + 64), "r" (temp_block + 64)
XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm2", "%xmm3",
"%xmm4", "%xmm5", "%xmm6", "%xmm7")
);
}
__asm__ volatile(
"movd %1, "MM"1 \n\t" // max_qcoeff
SPREADW(MM"1")
"psubusw "MM"1, "MM"4 \n\t"
"packuswb "MM"4, "MM"4 \n\t"
#if COMPILE_TEMPLATE_SSE2
"packsswb "MM"4, "MM"4 \n\t"
#endif
"movd "MM"4, %0 \n\t" // *overflow
: "=g" (*overflow)
: "g" (s->max_qcoeff)
);
if(s->mb_intra) block[0]= level;
else block[0]= temp_block[0];
av_assert2(ARCH_X86_32 || s->idsp.perm_type != FF_IDCT_PERM_SIMPLE);
if (ARCH_X86_32 && s->idsp.perm_type == FF_IDCT_PERM_SIMPLE) {
if(last_non_zero_p1 <= 1) goto end;
block[0x08] = temp_block[0x01]; block[0x10] = temp_block[0x08];
block[0x20] = temp_block[0x10];
if(last_non_zero_p1 <= 4) goto end;
block[0x18] = temp_block[0x09]; block[0x04] = temp_block[0x02];
block[0x09] = temp_block[0x03];
if(last_non_zero_p1 <= 7) goto end;
block[0x14] = temp_block[0x0A]; block[0x28] = temp_block[0x11];
block[0x12] = temp_block[0x18]; block[0x02] = temp_block[0x20];
if(last_non_zero_p1 <= 11) goto end;
block[0x1A] = temp_block[0x19]; block[0x24] = temp_block[0x12];
block[0x19] = temp_block[0x0B]; block[0x01] = temp_block[0x04];
block[0x0C] = temp_block[0x05];
if(last_non_zero_p1 <= 16) goto end;
block[0x11] = temp_block[0x0C]; block[0x29] = temp_block[0x13];
block[0x16] = temp_block[0x1A]; block[0x0A] = temp_block[0x21];
block[0x30] = temp_block[0x28]; block[0x22] = temp_block[0x30];
block[0x38] = temp_block[0x29]; block[0x06] = temp_block[0x22];
if(last_non_zero_p1 <= 24) goto end;
block[0x1B] = temp_block[0x1B]; block[0x21] = temp_block[0x14];
block[0x1C] = temp_block[0x0D]; block[0x05] = temp_block[0x06];
block[0x0D] = temp_block[0x07]; block[0x15] = temp_block[0x0E];
block[0x2C] = temp_block[0x15]; block[0x13] = temp_block[0x1C];
if(last_non_zero_p1 <= 32) goto end;
block[0x0B] = temp_block[0x23]; block[0x34] = temp_block[0x2A];
block[0x2A] = temp_block[0x31]; block[0x32] = temp_block[0x38];
block[0x3A] = temp_block[0x39]; block[0x26] = temp_block[0x32];
block[0x39] = temp_block[0x2B]; block[0x03] = temp_block[0x24];
if(last_non_zero_p1 <= 40) goto end;
block[0x1E] = temp_block[0x1D]; block[0x25] = temp_block[0x16];
block[0x1D] = temp_block[0x0F]; block[0x2D] = temp_block[0x17];
block[0x17] = temp_block[0x1E]; block[0x0E] = temp_block[0x25];
block[0x31] = temp_block[0x2C]; block[0x2B] = temp_block[0x33];
if(last_non_zero_p1 <= 48) goto end;
block[0x36] = temp_block[0x3A]; block[0x3B] = temp_block[0x3B];
block[0x23] = temp_block[0x34]; block[0x3C] = temp_block[0x2D];
block[0x07] = temp_block[0x26]; block[0x1F] = temp_block[0x1F];
block[0x0F] = temp_block[0x27]; block[0x35] = temp_block[0x2E];
if(last_non_zero_p1 <= 56) goto end;
block[0x2E] = temp_block[0x35]; block[0x33] = temp_block[0x3C];
block[0x3E] = temp_block[0x3D]; block[0x27] = temp_block[0x36];
block[0x3D] = temp_block[0x2F]; block[0x2F] = temp_block[0x37];
block[0x37] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];
}else if(s->idsp.perm_type == FF_IDCT_PERM_LIBMPEG2){
if(last_non_zero_p1 <= 1) goto end;
block[0x04] = temp_block[0x01];
block[0x08] = temp_block[0x08]; block[0x10] = temp_block[0x10];
if(last_non_zero_p1 <= 4) goto end;
block[0x0C] = temp_block[0x09]; block[0x01] = temp_block[0x02];
block[0x05] = temp_block[0x03];
if(last_non_zero_p1 <= 7) goto end;
block[0x09] = temp_block[0x0A]; block[0x14] = temp_block[0x11];
block[0x18] = temp_block[0x18]; block[0x20] = temp_block[0x20];
if(last_non_zero_p1 <= 11) goto end;
block[0x1C] = temp_block[0x19];
block[0x11] = temp_block[0x12]; block[0x0D] = temp_block[0x0B];
block[0x02] = temp_block[0x04]; block[0x06] = temp_block[0x05];
if(last_non_zero_p1 <= 16) goto end;
block[0x0A] = temp_block[0x0C]; block[0x15] = temp_block[0x13];
block[0x19] = temp_block[0x1A]; block[0x24] = temp_block[0x21];
block[0x28] = temp_block[0x28]; block[0x30] = temp_block[0x30];
block[0x2C] = temp_block[0x29]; block[0x21] = temp_block[0x22];
if(last_non_zero_p1 <= 24) goto end;
block[0x1D] = temp_block[0x1B]; block[0x12] = temp_block[0x14];
block[0x0E] = temp_block[0x0D]; block[0x03] = temp_block[0x06];
block[0x07] = temp_block[0x07]; block[0x0B] = temp_block[0x0E];
block[0x16] = temp_block[0x15]; block[0x1A] = temp_block[0x1C];
if(last_non_zero_p1 <= 32) goto end;
block[0x25] = temp_block[0x23]; block[0x29] = temp_block[0x2A];
block[0x34] = temp_block[0x31]; block[0x38] = temp_block[0x38];
block[0x3C] = temp_block[0x39]; block[0x31] = temp_block[0x32];
block[0x2D] = temp_block[0x2B]; block[0x22] = temp_block[0x24];
if(last_non_zero_p1 <= 40) goto end;
block[0x1E] = temp_block[0x1D]; block[0x13] = temp_block[0x16];
block[0x0F] = temp_block[0x0F]; block[0x17] = temp_block[0x17];
block[0x1B] = temp_block[0x1E]; block[0x26] = temp_block[0x25];
block[0x2A] = temp_block[0x2C]; block[0x35] = temp_block[0x33];
if(last_non_zero_p1 <= 48) goto end;
block[0x39] = temp_block[0x3A]; block[0x3D] = temp_block[0x3B];
block[0x32] = temp_block[0x34]; block[0x2E] = temp_block[0x2D];
block[0x23] = temp_block[0x26]; block[0x1F] = temp_block[0x1F];
block[0x27] = temp_block[0x27]; block[0x2B] = temp_block[0x2E];
if(last_non_zero_p1 <= 56) goto end;
block[0x36] = temp_block[0x35]; block[0x3A] = temp_block[0x3C];
block[0x3E] = temp_block[0x3D]; block[0x33] = temp_block[0x36];
block[0x2F] = temp_block[0x2F]; block[0x37] = temp_block[0x37];
block[0x3B] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];
} else if (s->idsp.perm_type == FF_IDCT_PERM_NONE) {
if(last_non_zero_p1 <= 1) goto end;
block[0x01] = temp_block[0x01];
block[0x08] = temp_block[0x08]; block[0x10] = temp_block[0x10];
if(last_non_zero_p1 <= 4) goto end;
block[0x09] = temp_block[0x09]; block[0x02] = temp_block[0x02];
block[0x03] = temp_block[0x03];
if(last_non_zero_p1 <= 7) goto end;
block[0x0A] = temp_block[0x0A]; block[0x11] = temp_block[0x11];
block[0x18] = temp_block[0x18]; block[0x20] = temp_block[0x20];
if(last_non_zero_p1 <= 11) goto end;
block[0x19] = temp_block[0x19];
block[0x12] = temp_block[0x12]; block[0x0B] = temp_block[0x0B];
block[0x04] = temp_block[0x04]; block[0x05] = temp_block[0x05];
if(last_non_zero_p1 <= 16) goto end;
block[0x0C] = temp_block[0x0C]; block[0x13] = temp_block[0x13];
block[0x1A] = temp_block[0x1A]; block[0x21] = temp_block[0x21];
block[0x28] = temp_block[0x28]; block[0x30] = temp_block[0x30];
block[0x29] = temp_block[0x29]; block[0x22] = temp_block[0x22];
if(last_non_zero_p1 <= 24) goto end;
block[0x1B] = temp_block[0x1B]; block[0x14] = temp_block[0x14];
block[0x0D] = temp_block[0x0D]; block[0x06] = temp_block[0x06];
block[0x07] = temp_block[0x07]; block[0x0E] = temp_block[0x0E];
block[0x15] = temp_block[0x15]; block[0x1C] = temp_block[0x1C];
if(last_non_zero_p1 <= 32) goto end;
block[0x23] = temp_block[0x23]; block[0x2A] = temp_block[0x2A];
block[0x31] = temp_block[0x31]; block[0x38] = temp_block[0x38];
block[0x39] = temp_block[0x39]; block[0x32] = temp_block[0x32];
block[0x2B] = temp_block[0x2B]; block[0x24] = temp_block[0x24];
if(last_non_zero_p1 <= 40) goto end;
block[0x1D] = temp_block[0x1D]; block[0x16] = temp_block[0x16];
block[0x0F] = temp_block[0x0F]; block[0x17] = temp_block[0x17];
block[0x1E] = temp_block[0x1E]; block[0x25] = temp_block[0x25];
block[0x2C] = temp_block[0x2C]; block[0x33] = temp_block[0x33];
if(last_non_zero_p1 <= 48) goto end;
block[0x3A] = temp_block[0x3A]; block[0x3B] = temp_block[0x3B];
block[0x34] = temp_block[0x34]; block[0x2D] = temp_block[0x2D];
block[0x26] = temp_block[0x26]; block[0x1F] = temp_block[0x1F];
block[0x27] = temp_block[0x27]; block[0x2E] = temp_block[0x2E];
if(last_non_zero_p1 <= 56) goto end;
block[0x35] = temp_block[0x35]; block[0x3C] = temp_block[0x3C];
block[0x3D] = temp_block[0x3D]; block[0x36] = temp_block[0x36];
block[0x2F] = temp_block[0x2F]; block[0x37] = temp_block[0x37];
block[0x3E] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];
} else if (s->idsp.perm_type == FF_IDCT_PERM_TRANSPOSE) {
if(last_non_zero_p1 <= 1) goto end;
block[0x08] = temp_block[0x01];
block[0x01] = temp_block[0x08]; block[0x02] = temp_block[0x10];
if(last_non_zero_p1 <= 4) goto end;
block[0x09] = temp_block[0x09]; block[0x10] = temp_block[0x02];
block[0x18] = temp_block[0x03];
if(last_non_zero_p1 <= 7) goto end;
block[0x11] = temp_block[0x0A]; block[0x0A] = temp_block[0x11];
block[0x03] = temp_block[0x18]; block[0x04] = temp_block[0x20];
if(last_non_zero_p1 <= 11) goto end;
block[0x0B] = temp_block[0x19];
block[0x12] = temp_block[0x12]; block[0x19] = temp_block[0x0B];
block[0x20] = temp_block[0x04]; block[0x28] = temp_block[0x05];
if(last_non_zero_p1 <= 16) goto end;
block[0x21] = temp_block[0x0C]; block[0x1A] = temp_block[0x13];
block[0x13] = temp_block[0x1A]; block[0x0C] = temp_block[0x21];
block[0x05] = temp_block[0x28]; block[0x06] = temp_block[0x30];
block[0x0D] = temp_block[0x29]; block[0x14] = temp_block[0x22];
if(last_non_zero_p1 <= 24) goto end;
block[0x1B] = temp_block[0x1B]; block[0x22] = temp_block[0x14];
block[0x29] = temp_block[0x0D]; block[0x30] = temp_block[0x06];
block[0x38] = temp_block[0x07]; block[0x31] = temp_block[0x0E];
block[0x2A] = temp_block[0x15]; block[0x23] = temp_block[0x1C];
if(last_non_zero_p1 <= 32) goto end;
block[0x1C] = temp_block[0x23]; block[0x15] = temp_block[0x2A];
block[0x0E] = temp_block[0x31]; block[0x07] = temp_block[0x38];
block[0x0F] = temp_block[0x39]; block[0x16] = temp_block[0x32];
block[0x1D] = temp_block[0x2B]; block[0x24] = temp_block[0x24];
if(last_non_zero_p1 <= 40) goto end;
block[0x2B] = temp_block[0x1D]; block[0x32] = temp_block[0x16];
block[0x39] = temp_block[0x0F]; block[0x3A] = temp_block[0x17];
block[0x33] = temp_block[0x1E]; block[0x2C] = temp_block[0x25];
block[0x25] = temp_block[0x2C]; block[0x1E] = temp_block[0x33];
if(last_non_zero_p1 <= 48) goto end;
block[0x17] = temp_block[0x3A]; block[0x1F] = temp_block[0x3B];
block[0x26] = temp_block[0x34]; block[0x2D] = temp_block[0x2D];
block[0x34] = temp_block[0x26]; block[0x3B] = temp_block[0x1F];
block[0x3C] = temp_block[0x27]; block[0x35] = temp_block[0x2E];
if(last_non_zero_p1 <= 56) goto end;
block[0x2E] = temp_block[0x35]; block[0x27] = temp_block[0x3C];
block[0x2F] = temp_block[0x3D]; block[0x36] = temp_block[0x36];
block[0x3D] = temp_block[0x2F]; block[0x3E] = temp_block[0x37];
block[0x37] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];
} else {
av_log(s, AV_LOG_DEBUG, "s->idsp.perm_type: %d\n",
(int)s->idsp.perm_type);
av_assert0(s->idsp.perm_type == FF_IDCT_PERM_NONE ||
s->idsp.perm_type == FF_IDCT_PERM_LIBMPEG2 ||
s->idsp.perm_type == FF_IDCT_PERM_SIMPLE ||
s->idsp.perm_type == FF_IDCT_PERM_TRANSPOSE);
}
end:
return last_non_zero_p1 - 1;
}
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