mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
120 lines
5.5 KiB
120 lines
5.5 KiB
6 years ago
|
/*
|
||
|
|
* Loongson SIMD optimized h264chroma
|
||
|
|
*
|
||
|
|
* Copyright (c) 2018 Loongson Technology Corporation Limited
|
||
|
|
* Copyright (c) 2018 Shiyou Yin <yinshiyou-hf@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
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef AVCODEC_MIPS_CABAC_H
|
||
|
|
#define AVCODEC_MIPS_CABAC_H
|
||
|
|
|
||
|
|
#include "libavcodec/cabac.h"
|
||
|
|
#include "libavutil/mips/mmiutils.h"
|
||
|
|
#include "config.h"
|
||
|
|
|
||
|
|
#define get_cabac_inline get_cabac_inline_mips
|
||
|
|
static av_always_inline int get_cabac_inline(CABACContext *c,
|
||
|
|
uint8_t * const state){
|
||
|
|
mips_reg tmp0, tmp1, tmp2, bit;
|
||
|
|
|
||
|
|
__asm__ volatile (
|
||
|
|
"lbu %[bit], 0(%[state]) \n\t"
|
||
|
|
"and %[tmp0], %[c_range], 0xC0 \n\t"
|
||
|
|
PTR_ADDU "%[tmp0], %[tmp0], %[tmp0] \n\t"
|
||
|
|
PTR_ADDU "%[tmp0], %[tmp0], %[tables] \n\t"
|
||
|
|
PTR_ADDU "%[tmp0], %[tmp0], %[bit] \n\t"
|
||
|
|
/* tmp1: RangeLPS */
|
||
|
|
"lbu %[tmp1], %[lps_off](%[tmp0]) \n\t"
|
||
|
|
|
||
|
|
PTR_SUBU "%[c_range], %[c_range], %[tmp1] \n\t"
|
||
|
|
PTR_SLL "%[tmp0], %[c_range], 0x11 \n\t"
|
||
|
|
PTR_SUBU "%[tmp0], %[tmp0], %[c_low] \n\t"
|
||
|
|
|
||
|
|
/* tmp2: lps_mask */
|
||
|
|
PTR_SRA "%[tmp2], %[tmp0], 0x1F \n\t"
|
||
|
|
/* If tmp0 < 0, lps_mask == 0xffffffff*/
|
||
|
|
/* If tmp0 >= 0, lps_mask == 0x00000000*/
|
||
|
|
"beqz %[tmp2], 1f \n\t"
|
||
|
|
PTR_SLL "%[tmp0], %[c_range], 0x11 \n\t"
|
||
|
|
PTR_SUBU "%[c_low], %[c_low], %[tmp0] \n\t"
|
||
|
|
PTR_SUBU "%[tmp0], %[tmp1], %[c_range] \n\t"
|
||
|
|
PTR_ADDU "%[c_range], %[c_range], %[tmp0] \n\t"
|
||
|
|
"xor %[bit], %[bit], %[tmp2] \n\t"
|
||
|
|
|
||
|
|
"1: \n\t"
|
||
|
|
/* tmp1: *state */
|
||
|
|
PTR_ADDU "%[tmp0], %[tables], %[bit] \n\t"
|
||
|
|
"lbu %[tmp1], %[mlps_off](%[tmp0]) \n\t"
|
||
|
|
/* tmp2: lps_mask */
|
||
|
|
PTR_ADDU "%[tmp0], %[tables], %[c_range] \n\t"
|
||
|
|
"lbu %[tmp2], %[norm_off](%[tmp0]) \n\t"
|
||
|
|
|
||
|
|
"sb %[tmp1], 0(%[state]) \n\t"
|
||
|
|
"and %[bit], %[bit], 0x01 \n\t"
|
||
|
|
PTR_SLL "%[c_range], %[c_range], %[tmp2] \n\t"
|
||
|
|
PTR_SLL "%[c_low], %[c_low], %[tmp2] \n\t"
|
||
|
|
|
||
|
|
"and %[tmp0], %[c_low], %[cabac_mask] \n\t"
|
||
|
|
"bnez %[tmp0], 1f \n\t"
|
||
|
|
PTR_ADDI "%[tmp0], %[c_low], -0X01 \n\t"
|
||
|
|
"xor %[tmp0], %[c_low], %[tmp0] \n\t"
|
||
|
|
PTR_SRA "%[tmp0], %[tmp0], 0x0f \n\t"
|
||
|
|
PTR_ADDU "%[tmp0], %[tmp0], %[tables] \n\t"
|
||
|
|
"lbu %[tmp2], %[norm_off](%[tmp0]) \n\t"
|
||
|
|
#if CABAC_BITS == 16
|
||
|
|
"lbu %[tmp0], 0(%[c_bytestream]) \n\t"
|
||
|
|
"lbu %[tmp1], 1(%[c_bytestream]) \n\t"
|
||
|
|
PTR_SLL "%[tmp0], %[tmp0], 0x09 \n\t"
|
||
|
|
PTR_SLL "%[tmp1], %[tmp1], 0x01 \n\t"
|
||
|
|
PTR_ADDU "%[tmp0], %[tmp0], %[tmp1] \n\t"
|
||
|
|
#else
|
||
|
|
"lbu %[tmp0], 0(%[c_bytestream]) \n\t"
|
||
|
|
PTR_SLL "%[tmp0], %[tmp0], 0x01 \n\t"
|
||
|
|
#endif
|
||
|
|
PTR_SUBU "%[tmp0], %[tmp0], %[cabac_mask] \n\t"
|
||
|
|
|
||
|
|
"li %[tmp1], 0x07 \n\t"
|
||
|
|
PTR_SUBU "%[tmp1], %[tmp1], %[tmp2] \n\t"
|
||
|
|
PTR_SLL "%[tmp0], %[tmp0], %[tmp1] \n\t"
|
||
|
|
PTR_ADDU "%[c_low], %[c_low], %[tmp0] \n\t"
|
||
|
|
|
||
|
|
#if !UNCHECKED_BITSTREAM_READER
|
||
|
|
"bge %[c_bytestream], %[c_bytestream_end], 1f \n\t"
|
||
|
|
#endif
|
||
|
|
PTR_ADDIU "%[c_bytestream], %[c_bytestream], 0X02 \n\t"
|
||
|
|
"1: \n\t"
|
||
|
|
: [bit]"=&r"(bit), [tmp0]"=&r"(tmp0), [tmp1]"=&r"(tmp1), [tmp2]"=&r"(tmp2),
|
||
|
|
[c_range]"+&r"(c->range), [c_low]"+&r"(c->low),
|
||
|
|
[c_bytestream]"+&r"(c->bytestream)
|
||
|
|
: [state]"r"(state), [tables]"r"(ff_h264_cabac_tables),
|
||
|
|
#if !UNCHECKED_BITSTREAM_READER
|
||
|
|
[c_bytestream_end]"r"(c->bytestream_end),
|
||
|
|
#endif
|
||
|
|
[lps_off]"i"(H264_LPS_RANGE_OFFSET),
|
||
|
|
[mlps_off]"i"(H264_MLPS_STATE_OFFSET + 128),
|
||
|
|
[norm_off]"i"(H264_NORM_SHIFT_OFFSET),
|
||
|
|
[cabac_mask]"i"(CABAC_MASK)
|
||
|
|
: "memory"
|
||
|
|
);
|
||
|
|
|
||
|
|
return bit;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* AVCODEC_MIPS_CABAC_H */
|