/*
* WMV2 - DSP functions Loongson MMI-optimized
*
* Copyright (c) 2016 Zhou Xiaoyong <zhouxiaoyong@loongson.cn>
*
* 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 "libavutil/avassert.h"
#include "constants.h"
#include "wmv2dsp_mips.h"
#include "libavutil/mips/mmiutils.h"
#define W0 2048
#define W1 2841 /* 2048*sqrt (2)*cos (1*pi/16) */
#define W2 2676 /* 2048*sqrt (2)*cos (2*pi/16) */
#define W3 2408 /* 2048*sqrt (2)*cos (3*pi/16) */
#define W4 2048 /* 2048*sqrt (2)*cos (4*pi/16) */
#define W5 1609 /* 2048*sqrt (2)*cos (5*pi/16) */
#define W6 1108 /* 2048*sqrt (2)*cos (6*pi/16) */
#define W7 565 /* 2048*sqrt (2)*cos (7*pi/16) */
static void wmv2_idct_row_mmi(short * b)
{
int s1, s2;
int a0, a1, a2, a3, a4, a5, a6, a7;
/* step 1 */
a0 = W0 * b[0] + W0 * b[4];
a1 = W1 * b[1] + W7 * b[7];
a2 = W2 * b[2] + W6 * b[6];
a3 = W3 * b[5] - W5 * b[3];
a4 = W0 * b[0] - W0 * b[4];
a5 = W5 * b[5] + W3 * b[3];
a6 = W6 * b[2] - W2 * b[6];
a7 = W7 * b[1] - W1 * b[7];
/* step 2 */
s1 = (181 * (a1 - a5 + a7 - a3) + 128) >> 8; // 1, 3, 5, 7
s2 = (181 * (a1 - a5 - a7 + a3) + 128) >> 8;
/* step 3 */
b[0] = (a0 + a2 + a1 + a5 + 128) >> 8;
b[1] = (a4 + a6 + s1 + 128) >> 8;
b[2] = (a4 - a6 + s2 + 128) >> 8;
b[3] = (a0 - a2 + a7 + a3 + 128) >> 8;
b[4] = (a0 - a2 - a7 - a3 + 128) >> 8;
b[5] = (a4 - a6 - s2 + 128) >> 8;
b[6] = (a4 + a6 - s1 + 128) >> 8;
b[7] = (a0 + a2 - a1 - a5 + 128) >> 8;
}
static void wmv2_idct_col_mmi(short * b)
{
int s1, s2;
int a0, a1, a2, a3, a4, a5, a6, a7;
/* step 1, with extended precision */
a0 = (W0 * b[ 0] + W0 * b[32] ) >> 3;
a1 = (W1 * b[ 8] + W7 * b[56] + 4) >> 3;
a2 = (W2 * b[16] + W6 * b[48] + 4) >> 3;
a3 = (W3 * b[40] - W5 * b[24] + 4) >> 3;
a4 = (W0 * b[ 0] - W0 * b[32] ) >> 3;
a5 = (W5 * b[40] + W3 * b[24] + 4) >> 3;
a6 = (W6 * b[16] - W2 * b[48] + 4) >> 3;
a7 = (W7 * b[ 8] - W1 * b[56] + 4) >> 3;
/* step 2 */
s1 = (181 * (a1 - a5 + a7 - a3) + 128) >> 8;
s2 = (181 * (a1 - a5 - a7 + a3) + 128) >> 8;
/* step 3 */
b[ 0] = (a0 + a2 + a1 + a5 + 8192) >> 14;
b[ 8] = (a4 + a6 + s1 + 8192) >> 14;
b[16] = (a4 - a6 + s2 + 8192) >> 14;
b[24] = (a0 - a2 + a7 + a3 + 8192) >> 14;
b[32] = (a0 - a2 - a7 - a3 + 8192) >> 14;
b[40] = (a4 - a6 - s2 + 8192) >> 14;
b[48] = (a4 + a6 - s1 + 8192) >> 14;
b[56] = (a0 + a2 - a1 - a5 + 8192) >> 14;
}
void ff_wmv2_idct_add_mmi(uint8_t *dest, int line_size, int16_t *block)
{
int i;
double ftmp[11];
for (i = 0; i < 64; i += 8)
wmv2_idct_row_mmi(block + i);
for (i = 0; i < 8; i++)
wmv2_idct_col_mmi(block + i);
__asm__ volatile (
"xor %[ftmp0], %[ftmp0], %[ftmp0] \n\t"
// low 4 loop
MMI_LDC1(%[ftmp1], %[block], 0x00)
MMI_LDC1(%[ftmp2], %[block], 0x08)
MMI_LDC1(%[ftmp3], %[block], 0x10)
MMI_LDC1(%[ftmp4], %[block], 0x18)
MMI_LDC1(%[ftmp5], %[block], 0x20)
MMI_LDC1(%[ftmp6], %[block], 0x28)
MMI_LDC1(%[ftmp7], %[block], 0x30)
MMI_LDC1(%[ftmp8], %[block], 0x38)
MMI_LDC1(%[ftmp9], %[dest], 0x00)
"punpckhbh %[ftmp10], %[ftmp9], %[ftmp0] \n\t"
"punpcklbh %[ftmp9], %[ftmp9], %[ftmp0] \n\t"
"paddh %[ftmp1], %[ftmp1], %[ftmp9] \n\t"
"paddh %[ftmp2], %[ftmp2], %[ftmp10] \n\t"
"packushb %[ftmp1], %[ftmp1], %[ftmp2] \n\t"
MMI_SDC1(%[ftmp1], %[dest], 0x00)
PTR_ADDU "%[dest], %[dest], %[line_size] \n\t"
MMI_LDC1(%[ftmp9], %[dest], 0x00)
"punpckhbh %[ftmp10], %[ftmp9], %[ftmp0] \n\t"
"punpcklbh %[ftmp9], %[ftmp9], %[ftmp0] \n\t"
"paddh %[ftmp3], %[ftmp3], %[ftmp9] \n\t"
"paddh %[ftmp4], %[ftmp4], %[ftmp10] \n\t"
"packushb %[ftmp3], %[ftmp3], %[ftmp4] \n\t"
MMI_SDC1(%[ftmp3], %[dest], 0x00)
PTR_ADDU "%[dest], %[dest], %[line_size] \n\t"
MMI_LDC1(%[ftmp9], %[dest], 0x00)
"punpckhbh %[ftmp10], %[ftmp9], %[ftmp0] \n\t"
"punpcklbh %[ftmp9], %[ftmp9], %[ftmp0] \n\t"
"paddh %[ftmp5], %[ftmp5], %[ftmp9] \n\t"
"paddh %[ftmp6], %[ftmp6], %[ftmp10] \n\t"
"packushb %[ftmp5], %[ftmp5], %[ftmp6] \n\t"
MMI_SDC1(%[ftmp5], %[dest], 0x00)
PTR_ADDU "%[dest], %[dest], %[line_size] \n\t"
MMI_LDC1(%[ftmp9], %[dest], 0x00)
"punpckhbh %[ftmp10], %[ftmp9], %[ftmp0] \n\t"
"punpcklbh %[ftmp9], %[ftmp9], %[ftmp0] \n\t"
"paddh %[ftmp7], %[ftmp7], %[ftmp9] \n\t"
"paddh %[ftmp8], %[ftmp8], %[ftmp10] \n\t"
"packushb %[ftmp7], %[ftmp7], %[ftmp8] \n\t"
MMI_SDC1(%[ftmp7], %[dest], 0x00)
PTR_ADDIU "%[block], %[block], 0x40 \n\t"
PTR_ADDU "%[dest], %[dest], %[line_size] \n\t"
// high 4 loop
MMI_LDC1(%[ftmp1], %[block], 0x00)
MMI_LDC1(%[ftmp2], %[block], 0x08)
MMI_LDC1(%[ftmp3], %[block], 0x10)
MMI_LDC1(%[ftmp4], %[block], 0x18)
MMI_LDC1(%[ftmp5], %[block], 0x20)
MMI_LDC1(%[ftmp6], %[block], 0x28)
MMI_LDC1(%[ftmp7], %[block], 0x30)
MMI_LDC1(%[ftmp8], %[block], 0x38)
MMI_LDC1(%[ftmp9], %[dest], 0x00)
"punpckhbh %[ftmp10], %[ftmp9], %[ftmp0] \n\t"
"punpcklbh %[ftmp9], %[ftmp9], %[ftmp0] \n\t"
"paddh %[ftmp1], %[ftmp1], %[ftmp9] \n\t"
"paddh %[ftmp2], %[ftmp2], %[ftmp10] \n\t"
"packushb %[ftmp1], %[ftmp1], %[ftmp2] \n\t"
MMI_SDC1(%[ftmp1], %[dest], 0x00)
PTR_ADDU "%[dest], %[dest], %[line_size] \n\t"
MMI_LDC1(%[ftmp9], %[dest], 0x00)
"punpckhbh %[ftmp10], %[ftmp9], %[ftmp0] \n\t"
"punpcklbh %[ftmp9], %[ftmp9], %[ftmp0] \n\t"
"paddh %[ftmp3], %[ftmp3], %[ftmp9] \n\t"
"paddh %[ftmp4], %[ftmp4], %[ftmp10] \n\t"
"packushb %[ftmp3], %[ftmp3], %[ftmp4] \n\t"
MMI_SDC1(%[ftmp3], %[dest], 0x00)
PTR_ADDU "%[dest], %[dest], %[line_size] \n\t"
MMI_LDC1(%[ftmp9], %[dest], 0x00)
"punpckhbh %[ftmp10], %[ftmp9], %[ftmp0] \n\t"
"punpcklbh %[ftmp9], %[ftmp9], %[ftmp0] \n\t"
"paddh %[ftmp5], %[ftmp5], %[ftmp9] \n\t"
"paddh %[ftmp6], %[ftmp6], %[ftmp10] \n\t"
"packushb %[ftmp5], %[ftmp5], %[ftmp6] \n\t"
MMI_SDC1(%[ftmp5], %[dest], 0x00)
PTR_ADDU "%[dest], %[dest], %[line_size] \n\t"
MMI_LDC1(%[ftmp9], %[dest], 0x00)
"punpckhbh %[ftmp10], %[ftmp9], %[ftmp0] \n\t"
"punpcklbh %[ftmp9], %[ftmp9], %[ftmp0] \n\t"
"paddh %[ftmp7], %[ftmp7], %[ftmp9] \n\t"
"paddh %[ftmp8], %[ftmp8], %[ftmp10] \n\t"
"packushb %[ftmp7], %[ftmp7], %[ftmp8] \n\t"
MMI_SDC1(%[ftmp7], %[dest], 0x00)
: [ftmp0]"=&f"(ftmp[0]), [ftmp1]"=&f"(ftmp[1]),
[ftmp2]"=&f"(ftmp[2]), [ftmp3]"=&f"(ftmp[3]),
[ftmp4]"=&f"(ftmp[4]), [ftmp5]"=&f"(ftmp[5]),
[ftmp6]"=&f"(ftmp[6]), [ftmp7]"=&f"(ftmp[7]),
[ftmp8]"=&f"(ftmp[8]), [ftmp9]"=&f"(ftmp[9]),
[ftmp10]"=&f"(ftmp[10]),
[block]"+&r"(block), [dest]"+&r"(dest)
: [line_size]"r"((mips_reg)line_size)
: "memory"
);
}
void ff_wmv2_idct_put_mmi(uint8_t *dest, int line_size, int16_t *block)
{
int i;
double ftmp[8];
for (i = 0; i < 64; i += 8)
wmv2_idct_row_mmi(block + i);
for (i = 0; i < 8; i++)
wmv2_idct_col_mmi(block + i);
__asm__ volatile (
// low 4 loop
MMI_LDC1(%[ftmp0], %[block], 0x00)
MMI_LDC1(%[ftmp1], %[block], 0x08)
MMI_LDC1(%[ftmp2], %[block], 0x10)
MMI_LDC1(%[ftmp3], %[block], 0x18)
MMI_LDC1(%[ftmp4], %[block], 0x20)
MMI_LDC1(%[ftmp5], %[block], 0x28)
MMI_LDC1(%[ftmp6], %[block], 0x30)
MMI_LDC1(%[ftmp7], %[block], 0x38)
"packushb %[ftmp0], %[ftmp0], %[ftmp1] \n\t"
"packushb %[ftmp2], %[ftmp2], %[ftmp3] \n\t"
"packushb %[ftmp4], %[ftmp4], %[ftmp5] \n\t"
"packushb %[ftmp6], %[ftmp6], %[ftmp7] \n\t"
MMI_SDC1(%[ftmp0], %[dest], 0x00)
PTR_ADDU "%[dest], %[dest], %[line_size] \n\t"
MMI_SDC1(%[ftmp2], %[dest], 0x00)
PTR_ADDU "%[dest], %[dest], %[line_size] \n\t"
MMI_SDC1(%[ftmp4], %[dest], 0x00)
PTR_ADDU "%[dest], %[dest], %[line_size] \n\t"
MMI_SDC1(%[ftmp6], %[dest], 0x00)
PTR_ADDIU "%[block], %[block], 0x40 \n\t"
PTR_ADDU "%[dest], %[dest], %[line_size] \n\t"
// high 4 loop
MMI_LDC1(%[ftmp0], %[block], 0x00)
MMI_LDC1(%[ftmp1], %[block], 0x08)
MMI_LDC1(%[ftmp2], %[block], 0x10)
MMI_LDC1(%[ftmp3], %[block], 0x18)
MMI_LDC1(%[ftmp4], %[block], 0x20)
MMI_LDC1(%[ftmp5], %[block], 0x28)
MMI_LDC1(%[ftmp6], %[block], 0x30)
MMI_LDC1(%[ftmp7], %[block], 0x38)
"packushb %[ftmp0], %[ftmp0], %[ftmp1] \n\t"
"packushb %[ftmp2], %[ftmp2], %[ftmp3] \n\t"
"packushb %[ftmp4], %[ftmp4], %[ftmp5] \n\t"
"packushb %[ftmp6], %[ftmp6], %[ftmp7] \n\t"
MMI_SDC1(%[ftmp0], %[dest], 0x00)
PTR_ADDU "%[dest], %[dest], %[line_size] \n\t"
MMI_SDC1(%[ftmp2], %[dest], 0x00)
PTR_ADDU "%[dest], %[dest], %[line_size] \n\t"
MMI_SDC1(%[ftmp4], %[dest], 0x00)
PTR_ADDU "%[dest], %[dest], %[line_size] \n\t"
MMI_SDC1(%[ftmp6], %[dest], 0x00)
: [ftmp0]"=&f"(ftmp[0]), [ftmp1]"=&f"(ftmp[1]),
[ftmp2]"=&f"(ftmp[2]), [ftmp3]"=&f"(ftmp[3]),
[ftmp4]"=&f"(ftmp[4]), [ftmp5]"=&f"(ftmp[5]),
[ftmp6]"=&f"(ftmp[6]), [ftmp7]"=&f"(ftmp[7]),
[block]"+&r"(block), [dest]"+&r"(dest)
: [line_size]"r"((mips_reg)line_size)
: "memory"
);
}