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FFmpeg/libavcodec/mips/ac3dsp_mips.c

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/*
* Copyright (c) 2012
* MIPS Technologies, Inc., California.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the MIPS Technologies, Inc., nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Authors: Branimir Vasic (bvasic@mips.com)
* Nedeljko Babic (nbabic@mips.com)
*
* Various AC-3 DSP Utils optimized for MIPS
*
* 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
*/
/**
* @file
* Reference: libavcodec/ac3dsp.c
*/
#include "config.h"
#include "libavcodec/ac3dsp.h"
#include "libavcodec/ac3.h"
#include "libavcodec/ac3tab.h"
#include "libavutil/mips/asmdefs.h"
#if HAVE_INLINE_ASM
#if HAVE_MIPSDSP
static void ac3_bit_alloc_calc_bap_mips(int16_t *mask, int16_t *psd,
int start, int end,
int snr_offset, int floor,
const uint8_t *bap_tab, uint8_t *bap)
{
int band, band_end, cond;
int m, address1, address2;
int16_t *psd1, *psd_end;
uint8_t *bap1;
if (snr_offset == -960) {
memset(bap, 0, AC3_MAX_COEFS);
return;
}
psd1 = &psd[start];
bap1 = &bap[start];
band = ff_ac3_bin_to_band_tab[start];
do {
m = (FFMAX(mask[band] - snr_offset - floor, 0) & 0x1FE0) + floor;
band_end = ff_ac3_band_start_tab[++band];
band_end = FFMIN(band_end, end);
psd_end = psd + band_end - 1;
__asm__ volatile (
"slt %[cond], %[psd1], %[psd_end] \n\t"
"beqz %[cond], 1f \n\t"
"2: \n\t"
"lh %[address1], 0(%[psd1]) \n\t"
"lh %[address2], 2(%[psd1]) \n\t"
PTR_ADDIU " %[psd1], %[psd1], 4 \n\t"
"subu %[address1], %[address1], %[m] \n\t"
"sra %[address1], %[address1], 5 \n\t"
"addiu %[address1], %[address1], -32 \n\t"
"shll_s.w %[address1], %[address1], 26 \n\t"
"subu %[address2], %[address2], %[m] \n\t"
"sra %[address2], %[address2], 5 \n\t"
"sra %[address1], %[address1], 26 \n\t"
"addiu %[address1], %[address1], 32 \n\t"
"lbux %[address1], %[address1](%[bap_tab]) \n\t"
"addiu %[address2], %[address2], -32 \n\t"
"shll_s.w %[address2], %[address2], 26 \n\t"
"sb %[address1], 0(%[bap1]) \n\t"
"slt %[cond], %[psd1], %[psd_end] \n\t"
"sra %[address2], %[address2], 26 \n\t"
"addiu %[address2], %[address2], 32 \n\t"
"lbux %[address2], %[address2](%[bap_tab]) \n\t"
"sb %[address2], 1(%[bap1]) \n\t"
PTR_ADDIU " %[bap1], %[bap1], 2 \n\t"
"bnez %[cond], 2b \n\t"
PTR_ADDIU " %[psd_end], %[psd_end], 2 \n\t"
"slt %[cond], %[psd1], %[psd_end] \n\t"
"beqz %[cond], 3f \n\t"
"1: \n\t"
"lh %[address1], 0(%[psd1]) \n\t"
PTR_ADDIU " %[psd1], %[psd1], 2 \n\t"
"subu %[address1], %[address1], %[m] \n\t"
"sra %[address1], %[address1], 5 \n\t"
"addiu %[address1], %[address1], -32 \n\t"
"shll_s.w %[address1], %[address1], 26 \n\t"
"sra %[address1], %[address1], 26 \n\t"
"addiu %[address1], %[address1], 32 \n\t"
"lbux %[address1], %[address1](%[bap_tab]) \n\t"
"sb %[address1], 0(%[bap1]) \n\t"
PTR_ADDIU " %[bap1], %[bap1], 1 \n\t"
"3: \n\t"
: [address1]"=&r"(address1), [address2]"=&r"(address2),
[cond]"=&r"(cond), [bap1]"+r"(bap1),
[psd1]"+r"(psd1), [psd_end]"+r"(psd_end)
: [m]"r"(m), [bap_tab]"r"(bap_tab)
: "memory"
);
} while (end > band_end);
}
static void ac3_update_bap_counts_mips(uint16_t mant_cnt[16], uint8_t *bap,
int len)
{
void *temp0, *temp2, *temp4, *temp5, *temp6, *temp7;
int temp1, temp3;
__asm__ volatile (
"andi %[temp3], %[len], 3 \n\t"
PTR_ADDU "%[temp2], %[bap], %[len] \n\t"
PTR_ADDU "%[temp4], %[bap], %[temp3] \n\t"
"beq %[temp2], %[temp4], 4f \n\t"
"1: \n\t"
"lbu %[temp0], -1(%[temp2]) \n\t"
"lbu %[temp5], -2(%[temp2]) \n\t"
"lbu %[temp6], -3(%[temp2]) \n\t"
"sll %[temp0], %[temp0], 1 \n\t"
PTR_ADDU "%[temp0], %[mant_cnt], %[temp0] \n\t"
"sll %[temp5], %[temp5], 1 \n\t"
PTR_ADDU "%[temp5], %[mant_cnt], %[temp5] \n\t"
"lhu %[temp1], 0(%[temp0]) \n\t"
"sll %[temp6], %[temp6], 1 \n\t"
PTR_ADDU "%[temp6], %[mant_cnt], %[temp6] \n\t"
"addiu %[temp1], %[temp1], 1 \n\t"
"sh %[temp1], 0(%[temp0]) \n\t"
"lhu %[temp1], 0(%[temp5]) \n\t"
"lbu %[temp7], -4(%[temp2]) \n\t"
PTR_ADDIU "%[temp2],%[temp2], -4 \n\t"
"addiu %[temp1], %[temp1], 1 \n\t"
"sh %[temp1], 0(%[temp5]) \n\t"
"lhu %[temp1], 0(%[temp6]) \n\t"
"sll %[temp7], %[temp7], 1 \n\t"
PTR_ADDU "%[temp7], %[mant_cnt], %[temp7] \n\t"
"addiu %[temp1], %[temp1],1 \n\t"
"sh %[temp1], 0(%[temp6]) \n\t"
"lhu %[temp1], 0(%[temp7]) \n\t"
"addiu %[temp1], %[temp1], 1 \n\t"
"sh %[temp1], 0(%[temp7]) \n\t"
"bne %[temp2], %[temp4], 1b \n\t"
"4: \n\t"
"beqz %[temp3], 2f \n\t"
"3: \n\t"
"addiu %[temp3], %[temp3], -1 \n\t"
"lbu %[temp0], -1(%[temp2]) \n\t"
PTR_ADDIU "%[temp2],%[temp2], -1 \n\t"
"sll %[temp0], %[temp0], 1 \n\t"
PTR_ADDU "%[temp0], %[mant_cnt], %[temp0] \n\t"
"lhu %[temp1], 0(%[temp0]) \n\t"
"addiu %[temp1], %[temp1], 1 \n\t"
"sh %[temp1], 0(%[temp0]) \n\t"
"bgtz %[temp3], 3b \n\t"
"2: \n\t"
: [temp0] "=&r" (temp0), [temp1] "=&r" (temp1),
[temp2] "=&r" (temp2), [temp3] "=&r" (temp3),
[temp4] "=&r" (temp4), [temp5] "=&r" (temp5),
[temp6] "=&r" (temp6), [temp7] "=&r" (temp7)
: [len] "r" (len), [bap] "r" (bap),
[mant_cnt] "r" (mant_cnt)
: "memory"
);
}
#endif
#if HAVE_MIPSFPU
#if !HAVE_MIPS32R6 && !HAVE_MIPS64R6
static void float_to_fixed24_mips(int32_t *dst, const float *src, unsigned int len)
{
const float scale = 1 << 24;
float src0, src1, src2, src3, src4, src5, src6, src7;
int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7;
do {
__asm__ volatile (
"lwc1 %[src0], 0(%[src]) \n\t"
"lwc1 %[src1], 4(%[src]) \n\t"
"lwc1 %[src2], 8(%[src]) \n\t"
"lwc1 %[src3], 12(%[src]) \n\t"
"lwc1 %[src4], 16(%[src]) \n\t"
"lwc1 %[src5], 20(%[src]) \n\t"
"lwc1 %[src6], 24(%[src]) \n\t"
"lwc1 %[src7], 28(%[src]) \n\t"
"mul.s %[src0], %[src0], %[scale] \n\t"
"mul.s %[src1], %[src1], %[scale] \n\t"
"mul.s %[src2], %[src2], %[scale] \n\t"
"mul.s %[src3], %[src3], %[scale] \n\t"
"mul.s %[src4], %[src4], %[scale] \n\t"
"mul.s %[src5], %[src5], %[scale] \n\t"
"mul.s %[src6], %[src6], %[scale] \n\t"
"mul.s %[src7], %[src7], %[scale] \n\t"
"cvt.w.s %[src0], %[src0] \n\t"
"cvt.w.s %[src1], %[src1] \n\t"
"cvt.w.s %[src2], %[src2] \n\t"
"cvt.w.s %[src3], %[src3] \n\t"
"cvt.w.s %[src4], %[src4] \n\t"
"cvt.w.s %[src5], %[src5] \n\t"
"cvt.w.s %[src6], %[src6] \n\t"
"cvt.w.s %[src7], %[src7] \n\t"
"mfc1 %[temp0], %[src0] \n\t"
"mfc1 %[temp1], %[src1] \n\t"
"mfc1 %[temp2], %[src2] \n\t"
"mfc1 %[temp3], %[src3] \n\t"
"mfc1 %[temp4], %[src4] \n\t"
"mfc1 %[temp5], %[src5] \n\t"
"mfc1 %[temp6], %[src6] \n\t"
"mfc1 %[temp7], %[src7] \n\t"
"sw %[temp0], 0(%[dst]) \n\t"
"sw %[temp1], 4(%[dst]) \n\t"
"sw %[temp2], 8(%[dst]) \n\t"
"sw %[temp3], 12(%[dst]) \n\t"
"sw %[temp4], 16(%[dst]) \n\t"
"sw %[temp5], 20(%[dst]) \n\t"
"sw %[temp6], 24(%[dst]) \n\t"
"sw %[temp7], 28(%[dst]) \n\t"
: [dst] "+r" (dst), [src] "+r" (src),
[src0] "=&f" (src0), [src1] "=&f" (src1),
[src2] "=&f" (src2), [src3] "=&f" (src3),
[src4] "=&f" (src4), [src5] "=&f" (src5),
[src6] "=&f" (src6), [src7] "=&f" (src7),
[temp0] "=r" (temp0), [temp1] "=r" (temp1),
[temp2] "=r" (temp2), [temp3] "=r" (temp3),
[temp4] "=r" (temp4), [temp5] "=r" (temp5),
[temp6] "=r" (temp6), [temp7] "=r" (temp7)
: [scale] "f" (scale)
: "memory"
);
src = src + 8;
dst = dst + 8;
len -= 8;
} while (len > 0);
}
static void ac3_downmix_mips(float **samples, float (*matrix)[2],
int out_ch, int in_ch, int len)
{
int i, j, i1, i2, i3;
float v0, v1, v2, v3;
float v4, v5, v6, v7;
float samples0, samples1, samples2, samples3, matrix_j, matrix_j2;
float *samples_p, *samples_sw, *matrix_p, **samples_x, **samples_end;
__asm__ volatile(
".set push \n\t"
".set noreorder \n\t"
"li %[i1], 2 \n\t"
"sll %[len], 2 \n\t"
"move %[i], $zero \n\t"
"sll %[j], %[in_ch], " PTRLOG " \n\t"
"bne %[out_ch], %[i1], 3f \n\t" // if (out_ch == 2)
" li %[i2], 1 \n\t"
"2: \n\t" // start of the for loop (for (i = 0; i < len; i+=4))
"move %[matrix_p], %[matrix] \n\t"
"move %[samples_x], %[samples] \n\t"
"mtc1 $zero, %[v0] \n\t"
"mtc1 $zero, %[v1] \n\t"
"mtc1 $zero, %[v2] \n\t"
"mtc1 $zero, %[v3] \n\t"
"mtc1 $zero, %[v4] \n\t"
"mtc1 $zero, %[v5] \n\t"
"mtc1 $zero, %[v6] \n\t"
"mtc1 $zero, %[v7] \n\t"
"addiu %[i1], %[i], 4 \n\t"
"addiu %[i2], %[i], 8 \n\t"
PTR_L " %[samples_p], 0(%[samples_x]) \n\t"
"addiu %[i3], %[i], 12 \n\t"
PTR_ADDU "%[samples_end],%[samples_x], %[j] \n\t"
"move %[samples_sw], %[samples_p] \n\t"
"1: \n\t" // start of the inner for loop (for (j = 0; j < in_ch; j++))
"lwc1 %[matrix_j], 0(%[matrix_p]) \n\t"
"lwc1 %[matrix_j2], 4(%[matrix_p]) \n\t"
"lwxc1 %[samples0], %[i](%[samples_p]) \n\t"
"lwxc1 %[samples1], %[i1](%[samples_p]) \n\t"
"lwxc1 %[samples2], %[i2](%[samples_p]) \n\t"
"lwxc1 %[samples3], %[i3](%[samples_p]) \n\t"
PTR_ADDIU "%[matrix_p], 8 \n\t"
PTR_ADDIU "%[samples_x]," PTRSIZE " \n\t"
"madd.s %[v0], %[v0], %[samples0], %[matrix_j] \n\t"
"madd.s %[v1], %[v1], %[samples1], %[matrix_j] \n\t"
"madd.s %[v2], %[v2], %[samples2], %[matrix_j] \n\t"
"madd.s %[v3], %[v3], %[samples3], %[matrix_j] \n\t"
"madd.s %[v4], %[v4], %[samples0], %[matrix_j2]\n\t"
"madd.s %[v5], %[v5], %[samples1], %[matrix_j2]\n\t"
"madd.s %[v6], %[v6], %[samples2], %[matrix_j2]\n\t"
"madd.s %[v7], %[v7], %[samples3], %[matrix_j2]\n\t"
"bne %[samples_x], %[samples_end], 1b \n\t"
PTR_L " %[samples_p], 0(%[samples_x]) \n\t"
PTR_L " %[samples_p], " PTRSIZE "(%[samples]) \n\t"
"swxc1 %[v0], %[i](%[samples_sw]) \n\t"
"swxc1 %[v1], %[i1](%[samples_sw]) \n\t"
"swxc1 %[v2], %[i2](%[samples_sw]) \n\t"
"swxc1 %[v3], %[i3](%[samples_sw]) \n\t"
"swxc1 %[v4], %[i](%[samples_p]) \n\t"
"addiu %[i], 16 \n\t"
"swxc1 %[v5], %[i1](%[samples_p]) \n\t"
"swxc1 %[v6], %[i2](%[samples_p]) \n\t"
"bne %[i], %[len], 2b \n\t"
" swxc1 %[v7], %[i3](%[samples_p]) \n\t"
"3: \n\t"
"bne %[out_ch], %[i2], 6f \n\t" // if (out_ch == 1)
" nop \n\t"
"5: \n\t" // start of the outer for loop (for (i = 0; i < len; i+=4))
"move %[matrix_p], %[matrix] \n\t"
"move %[samples_x], %[samples] \n\t"
"mtc1 $zero, %[v0] \n\t"
"mtc1 $zero, %[v1] \n\t"
"mtc1 $zero, %[v2] \n\t"
"mtc1 $zero, %[v3] \n\t"
"addiu %[i1], %[i], 4 \n\t"
"addiu %[i2], %[i], 8 \n\t"
PTR_L " %[samples_p], 0(%[samples_x]) \n\t"
"addiu %[i3], %[i], 12 \n\t"
PTR_ADDU "%[samples_end],%[samples_x], %[j] \n\t"
"move %[samples_sw], %[samples_p] \n\t"
"4: \n\t" // start of the inner for loop (for (j = 0; j < in_ch; j++))
"lwc1 %[matrix_j], 0(%[matrix_p]) \n\t"
"lwxc1 %[samples0], %[i](%[samples_p]) \n\t"
"lwxc1 %[samples1], %[i1](%[samples_p]) \n\t"
"lwxc1 %[samples2], %[i2](%[samples_p]) \n\t"
"lwxc1 %[samples3], %[i3](%[samples_p]) \n\t"
PTR_ADDIU "%[matrix_p], 8 \n\t"
PTR_ADDIU "%[samples_x]," PTRSIZE " \n\t"
"madd.s %[v0], %[v0], %[samples0], %[matrix_j] \n\t"
"madd.s %[v1], %[v1], %[samples1], %[matrix_j] \n\t"
"madd.s %[v2], %[v2], %[samples2], %[matrix_j] \n\t"
"madd.s %[v3], %[v3], %[samples3], %[matrix_j] \n\t"
"bne %[samples_x], %[samples_end], 4b \n\t"
PTR_L " %[samples_p], 0(%[samples_x]) \n\t"
"swxc1 %[v0], %[i](%[samples_sw]) \n\t"
"addiu %[i], 16 \n\t"
"swxc1 %[v1], %[i1](%[samples_sw]) \n\t"
"swxc1 %[v2], %[i2](%[samples_sw]) \n\t"
"bne %[i], %[len], 5b \n\t"
" swxc1 %[v3], %[i3](%[samples_sw]) \n\t"
"6: \n\t"
".set pop"
:[samples_p]"=&r"(samples_p), [matrix_j]"=&f"(matrix_j), [matrix_j2]"=&f"(matrix_j2),
[samples0]"=&f"(samples0), [samples1]"=&f"(samples1),
[samples2]"=&f"(samples2), [samples3]"=&f"(samples3),
[v0]"=&f"(v0), [v1]"=&f"(v1), [v2]"=&f"(v2), [v3]"=&f"(v3),
[v4]"=&f"(v4), [v5]"=&f"(v5), [v6]"=&f"(v6), [v7]"=&f"(v7),
[samples_x]"=&r"(samples_x), [matrix_p]"=&r"(matrix_p),
[samples_end]"=&r"(samples_end), [samples_sw]"=&r"(samples_sw),
[i1]"=&r"(i1), [i2]"=&r"(i2), [i3]"=&r"(i3), [i]"=&r"(i),
[j]"=&r"(j), [len]"+r"(len)
:[samples]"r"(samples), [matrix]"r"(matrix),
[in_ch]"r"(in_ch), [out_ch]"r"(out_ch)
:"memory"
);
}
#endif /* !HAVE_MIPS32R6 && !HAVE_MIPS64R6 */
#endif /* HAVE_MIPSFPU */
#endif /* HAVE_INLINE_ASM */
void ff_ac3dsp_init_mips(AC3DSPContext *c, int bit_exact) {
#if HAVE_INLINE_ASM
#if HAVE_MIPSDSP
c->bit_alloc_calc_bap = ac3_bit_alloc_calc_bap_mips;
c->update_bap_counts = ac3_update_bap_counts_mips;
#endif
#if HAVE_MIPSFPU
#if !HAVE_MIPS32R6 && !HAVE_MIPS64R6
c->float_to_fixed24 = float_to_fixed24_mips;
//c->downmix = ac3_downmix_mips;
#endif
#endif
#endif
}