443 lines
18 KiB
C
443 lines
18 KiB
C
/*
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* Copyright (c) 2012
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* MIPS Technologies, Inc., California.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the MIPS Technologies, Inc., nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Authors: Darko Laus (darko@mips.com)
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* Djordje Pesut (djordje@mips.com)
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* Mirjana Vulin (mvulin@mips.com)
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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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/**
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* @file
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* Reference: libavcodec/aacdec.c
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*/
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#include "libavcodec/aac.h"
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#include "aacdec_mips.h"
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#include "libavcodec/aactab.h"
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#include "libavcodec/sinewin.h"
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#include "libavutil/mips/asmdefs.h"
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#if HAVE_INLINE_ASM
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#if HAVE_MIPSFPU
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static av_always_inline void float_copy(float *dst, const float *src, int count)
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{
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// Copy 'count' floats from src to dst
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const float *loop_end = src + count;
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int temp[8];
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// count must be a multiple of 8
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av_assert2(count % 8 == 0);
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// loop unrolled 8 times
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__asm__ volatile (
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".set push \n\t"
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".set noreorder \n\t"
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"1: \n\t"
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"lw %[temp0], 0(%[src]) \n\t"
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"lw %[temp1], 4(%[src]) \n\t"
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"lw %[temp2], 8(%[src]) \n\t"
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"lw %[temp3], 12(%[src]) \n\t"
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"lw %[temp4], 16(%[src]) \n\t"
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"lw %[temp5], 20(%[src]) \n\t"
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"lw %[temp6], 24(%[src]) \n\t"
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"lw %[temp7], 28(%[src]) \n\t"
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PTR_ADDIU "%[src], %[src], 32 \n\t"
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"sw %[temp0], 0(%[dst]) \n\t"
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"sw %[temp1], 4(%[dst]) \n\t"
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"sw %[temp2], 8(%[dst]) \n\t"
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"sw %[temp3], 12(%[dst]) \n\t"
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"sw %[temp4], 16(%[dst]) \n\t"
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"sw %[temp5], 20(%[dst]) \n\t"
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"sw %[temp6], 24(%[dst]) \n\t"
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"sw %[temp7], 28(%[dst]) \n\t"
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"bne %[src], %[loop_end], 1b \n\t"
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PTR_ADDIU "%[dst], %[dst], 32 \n\t"
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".set pop \n\t"
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: [temp0]"=&r"(temp[0]), [temp1]"=&r"(temp[1]),
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[temp2]"=&r"(temp[2]), [temp3]"=&r"(temp[3]),
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[temp4]"=&r"(temp[4]), [temp5]"=&r"(temp[5]),
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[temp6]"=&r"(temp[6]), [temp7]"=&r"(temp[7]),
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[src]"+r"(src), [dst]"+r"(dst)
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: [loop_end]"r"(loop_end)
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: "memory"
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);
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}
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static av_always_inline int lcg_random(unsigned previous_val)
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{
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union { unsigned u; int s; } v = { previous_val * 1664525u + 1013904223 };
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return v.s;
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}
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static void imdct_and_windowing_mips(AACContext *ac, SingleChannelElement *sce)
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{
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IndividualChannelStream *ics = &sce->ics;
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float *in = sce->coeffs;
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float *out = sce->ret;
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float *saved = sce->saved;
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const float *swindow = ics->use_kb_window[0] ? ff_aac_kbd_short_128 : ff_sine_128;
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const float *lwindow_prev = ics->use_kb_window[1] ? ff_aac_kbd_long_1024 : ff_sine_1024;
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const float *swindow_prev = ics->use_kb_window[1] ? ff_aac_kbd_short_128 : ff_sine_128;
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float *buf = ac->buf_mdct;
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int i;
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if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
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for (i = 0; i < 1024; i += 128)
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ac->mdct_small.imdct_half(&ac->mdct_small, buf + i, in + i);
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} else
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ac->mdct.imdct_half(&ac->mdct, buf, in);
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/* window overlapping
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* NOTE: To simplify the overlapping code, all 'meaningless' short to long
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* and long to short transitions are considered to be short to short
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* transitions. This leaves just two cases (long to long and short to short)
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* with a little special sauce for EIGHT_SHORT_SEQUENCE.
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*/
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if ((ics->window_sequence[1] == ONLY_LONG_SEQUENCE || ics->window_sequence[1] == LONG_STOP_SEQUENCE) &&
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(ics->window_sequence[0] == ONLY_LONG_SEQUENCE || ics->window_sequence[0] == LONG_START_SEQUENCE)) {
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ac->fdsp->vector_fmul_window( out, saved, buf, lwindow_prev, 512);
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} else {
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float_copy(out, saved, 448);
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if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
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{
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float wi;
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float wj;
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int i;
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float temp0, temp1, temp2, temp3;
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float *dst0 = out + 448 + 0*128;
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float *dst1 = dst0 + 64 + 63;
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float *dst2 = saved + 63;
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float *win0 = (float*)swindow;
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float *win1 = win0 + 64 + 63;
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float *win0_prev = (float*)swindow_prev;
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float *win1_prev = win0_prev + 64 + 63;
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float *src0_prev = saved + 448;
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float *src1_prev = buf + 0*128 + 63;
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float *src0 = buf + 0*128 + 64;
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float *src1 = buf + 1*128 + 63;
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for(i = 0; i < 64; i++)
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{
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temp0 = src0_prev[0];
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temp1 = src1_prev[0];
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wi = *win0_prev;
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wj = *win1_prev;
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temp2 = src0[0];
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temp3 = src1[0];
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dst0[0] = temp0 * wj - temp1 * wi;
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dst1[0] = temp0 * wi + temp1 * wj;
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wi = *win0;
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wj = *win1;
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temp0 = src0[128];
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temp1 = src1[128];
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dst0[128] = temp2 * wj - temp3 * wi;
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dst1[128] = temp2 * wi + temp3 * wj;
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temp2 = src0[256];
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temp3 = src1[256];
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dst0[256] = temp0 * wj - temp1 * wi;
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dst1[256] = temp0 * wi + temp1 * wj;
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dst0[384] = temp2 * wj - temp3 * wi;
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dst1[384] = temp2 * wi + temp3 * wj;
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temp0 = src0[384];
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temp1 = src1[384];
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dst0[512] = temp0 * wj - temp1 * wi;
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dst2[0] = temp0 * wi + temp1 * wj;
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src0++;
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src1--;
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src0_prev++;
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src1_prev--;
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win0++;
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win1--;
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win0_prev++;
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win1_prev--;
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dst0++;
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dst1--;
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dst2--;
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}
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}
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} else {
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ac->fdsp->vector_fmul_window(out + 448, saved + 448, buf, swindow_prev, 64);
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float_copy(out + 576, buf + 64, 448);
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}
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}
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// buffer update
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if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
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ac->fdsp->vector_fmul_window(saved + 64, buf + 4*128 + 64, buf + 5*128, swindow, 64);
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ac->fdsp->vector_fmul_window(saved + 192, buf + 5*128 + 64, buf + 6*128, swindow, 64);
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ac->fdsp->vector_fmul_window(saved + 320, buf + 6*128 + 64, buf + 7*128, swindow, 64);
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float_copy(saved + 448, buf + 7*128 + 64, 64);
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} else if (ics->window_sequence[0] == LONG_START_SEQUENCE) {
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float_copy(saved, buf + 512, 448);
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float_copy(saved + 448, buf + 7*128 + 64, 64);
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} else { // LONG_STOP or ONLY_LONG
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float_copy(saved, buf + 512, 512);
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}
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}
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static void apply_ltp_mips(AACContext *ac, SingleChannelElement *sce)
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{
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const LongTermPrediction *ltp = &sce->ics.ltp;
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const uint16_t *offsets = sce->ics.swb_offset;
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int i, sfb;
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int j, k;
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if (sce->ics.window_sequence[0] != EIGHT_SHORT_SEQUENCE) {
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float *predTime = sce->ret;
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float *predFreq = ac->buf_mdct;
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float *p_predTime;
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int16_t num_samples = 2048;
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if (ltp->lag < 1024)
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num_samples = ltp->lag + 1024;
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j = (2048 - num_samples) >> 2;
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k = (2048 - num_samples) & 3;
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p_predTime = &predTime[num_samples];
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for (i = 0; i < num_samples; i++)
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predTime[i] = sce->ltp_state[i + 2048 - ltp->lag] * ltp->coef;
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for (i = 0; i < j; i++) {
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/* loop unrolled 4 times */
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__asm__ volatile (
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"sw $0, 0(%[p_predTime]) \n\t"
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"sw $0, 4(%[p_predTime]) \n\t"
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"sw $0, 8(%[p_predTime]) \n\t"
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"sw $0, 12(%[p_predTime]) \n\t"
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PTR_ADDIU "%[p_predTime], %[p_predTime], 16 \n\t"
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: [p_predTime]"+r"(p_predTime)
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:
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: "memory"
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);
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}
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for (i = 0; i < k; i++) {
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__asm__ volatile (
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"sw $0, 0(%[p_predTime]) \n\t"
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PTR_ADDIU "%[p_predTime], %[p_predTime], 4 \n\t"
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: [p_predTime]"+r"(p_predTime)
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:
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: "memory"
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);
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}
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ac->windowing_and_mdct_ltp(ac, predFreq, predTime, &sce->ics);
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if (sce->tns.present)
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ac->apply_tns(predFreq, &sce->tns, &sce->ics, 0);
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for (sfb = 0; sfb < FFMIN(sce->ics.max_sfb, MAX_LTP_LONG_SFB); sfb++)
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if (ltp->used[sfb])
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for (i = offsets[sfb]; i < offsets[sfb + 1]; i++)
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sce->coeffs[i] += predFreq[i];
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}
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}
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static av_always_inline void fmul_and_reverse(float *dst, const float *src0, const float *src1, int count)
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{
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/* Multiply 'count' floats in src0 by src1 and store the results in dst in reverse */
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/* This should be equivalent to a normal fmul, followed by reversing dst */
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// count must be a multiple of 4
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av_assert2(count % 4 == 0);
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// move src0 and src1 to the last element of their arrays
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src0 += count - 1;
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src1 += count - 1;
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for (; count > 0; count -= 4){
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float temp[12];
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/* loop unrolled 4 times */
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__asm__ volatile (
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"lwc1 %[temp0], 0(%[ptr2]) \n\t"
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"lwc1 %[temp1], -4(%[ptr2]) \n\t"
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"lwc1 %[temp2], -8(%[ptr2]) \n\t"
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"lwc1 %[temp3], -12(%[ptr2]) \n\t"
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"lwc1 %[temp4], 0(%[ptr3]) \n\t"
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"lwc1 %[temp5], -4(%[ptr3]) \n\t"
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"lwc1 %[temp6], -8(%[ptr3]) \n\t"
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"lwc1 %[temp7], -12(%[ptr3]) \n\t"
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"mul.s %[temp8], %[temp0], %[temp4] \n\t"
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"mul.s %[temp9], %[temp1], %[temp5] \n\t"
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"mul.s %[temp10], %[temp2], %[temp6] \n\t"
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"mul.s %[temp11], %[temp3], %[temp7] \n\t"
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"swc1 %[temp8], 0(%[ptr1]) \n\t"
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"swc1 %[temp9], 4(%[ptr1]) \n\t"
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"swc1 %[temp10], 8(%[ptr1]) \n\t"
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"swc1 %[temp11], 12(%[ptr1]) \n\t"
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PTR_ADDIU "%[ptr1], %[ptr1], 16 \n\t"
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PTR_ADDIU "%[ptr2], %[ptr2], -16 \n\t"
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PTR_ADDIU "%[ptr3], %[ptr3], -16 \n\t"
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: [temp0]"=&f"(temp[0]), [temp1]"=&f"(temp[1]),
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[temp2]"=&f"(temp[2]), [temp3]"=&f"(temp[3]),
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[temp4]"=&f"(temp[4]), [temp5]"=&f"(temp[5]),
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[temp6]"=&f"(temp[6]), [temp7]"=&f"(temp[7]),
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[temp8]"=&f"(temp[8]), [temp9]"=&f"(temp[9]),
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[temp10]"=&f"(temp[10]), [temp11]"=&f"(temp[11]),
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[ptr1]"+r"(dst), [ptr2]"+r"(src0), [ptr3]"+r"(src1)
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:
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: "memory"
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);
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}
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}
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static void update_ltp_mips(AACContext *ac, SingleChannelElement *sce)
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{
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IndividualChannelStream *ics = &sce->ics;
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float *saved = sce->saved;
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float *saved_ltp = sce->coeffs;
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const float *lwindow = ics->use_kb_window[0] ? ff_aac_kbd_long_1024 : ff_sine_1024;
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const float *swindow = ics->use_kb_window[0] ? ff_aac_kbd_short_128 : ff_sine_128;
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float temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7;
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if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
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float *p_saved_ltp = saved_ltp + 576;
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float *loop_end1 = p_saved_ltp + 448;
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float_copy(saved_ltp, saved, 512);
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/* loop unrolled 8 times */
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__asm__ volatile (
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"1: \n\t"
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"sw $0, 0(%[p_saved_ltp]) \n\t"
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"sw $0, 4(%[p_saved_ltp]) \n\t"
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"sw $0, 8(%[p_saved_ltp]) \n\t"
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"sw $0, 12(%[p_saved_ltp]) \n\t"
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"sw $0, 16(%[p_saved_ltp]) \n\t"
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"sw $0, 20(%[p_saved_ltp]) \n\t"
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"sw $0, 24(%[p_saved_ltp]) \n\t"
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"sw $0, 28(%[p_saved_ltp]) \n\t"
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PTR_ADDIU "%[p_saved_ltp],%[p_saved_ltp], 32 \n\t"
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"bne %[p_saved_ltp], %[loop_end1], 1b \n\t"
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: [p_saved_ltp]"+r"(p_saved_ltp)
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: [loop_end1]"r"(loop_end1)
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: "memory"
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);
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ac->fdsp->vector_fmul_reverse(saved_ltp + 448, ac->buf_mdct + 960, &swindow[64], 64);
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fmul_and_reverse(saved_ltp + 512, ac->buf_mdct + 960, swindow, 64);
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} else if (ics->window_sequence[0] == LONG_START_SEQUENCE) {
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float *buff0 = saved;
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float *buff1 = saved_ltp;
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float *loop_end = saved + 448;
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/* loop unrolled 8 times */
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__asm__ volatile (
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".set push \n\t"
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".set noreorder \n\t"
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"1: \n\t"
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"lw %[temp0], 0(%[src]) \n\t"
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"lw %[temp1], 4(%[src]) \n\t"
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"lw %[temp2], 8(%[src]) \n\t"
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"lw %[temp3], 12(%[src]) \n\t"
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"lw %[temp4], 16(%[src]) \n\t"
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"lw %[temp5], 20(%[src]) \n\t"
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"lw %[temp6], 24(%[src]) \n\t"
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"lw %[temp7], 28(%[src]) \n\t"
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PTR_ADDIU "%[src], %[src], 32 \n\t"
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"sw %[temp0], 0(%[dst]) \n\t"
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"sw %[temp1], 4(%[dst]) \n\t"
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"sw %[temp2], 8(%[dst]) \n\t"
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"sw %[temp3], 12(%[dst]) \n\t"
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"sw %[temp4], 16(%[dst]) \n\t"
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"sw %[temp5], 20(%[dst]) \n\t"
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"sw %[temp6], 24(%[dst]) \n\t"
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"sw %[temp7], 28(%[dst]) \n\t"
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"sw $0, 2304(%[dst]) \n\t"
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"sw $0, 2308(%[dst]) \n\t"
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"sw $0, 2312(%[dst]) \n\t"
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"sw $0, 2316(%[dst]) \n\t"
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"sw $0, 2320(%[dst]) \n\t"
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"sw $0, 2324(%[dst]) \n\t"
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"sw $0, 2328(%[dst]) \n\t"
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"sw $0, 2332(%[dst]) \n\t"
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"bne %[src], %[loop_end], 1b \n\t"
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PTR_ADDIU "%[dst], %[dst], 32 \n\t"
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".set pop \n\t"
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|
: [temp0]"=&r"(temp0), [temp1]"=&r"(temp1),
|
|
[temp2]"=&r"(temp2), [temp3]"=&r"(temp3),
|
|
[temp4]"=&r"(temp4), [temp5]"=&r"(temp5),
|
|
[temp6]"=&r"(temp6), [temp7]"=&r"(temp7),
|
|
[src]"+r"(buff0), [dst]"+r"(buff1)
|
|
: [loop_end]"r"(loop_end)
|
|
: "memory"
|
|
);
|
|
ac->fdsp->vector_fmul_reverse(saved_ltp + 448, ac->buf_mdct + 960, &swindow[64], 64);
|
|
fmul_and_reverse(saved_ltp + 512, ac->buf_mdct + 960, swindow, 64);
|
|
} else { // LONG_STOP or ONLY_LONG
|
|
ac->fdsp->vector_fmul_reverse(saved_ltp, ac->buf_mdct + 512, &lwindow[512], 512);
|
|
fmul_and_reverse(saved_ltp + 512, ac->buf_mdct + 512, lwindow, 512);
|
|
}
|
|
|
|
float_copy(sce->ltp_state, sce->ltp_state + 1024, 1024);
|
|
float_copy(sce->ltp_state + 1024, sce->ret, 1024);
|
|
float_copy(sce->ltp_state + 2048, saved_ltp, 1024);
|
|
}
|
|
#endif /* HAVE_MIPSFPU */
|
|
#endif /* HAVE_INLINE_ASM */
|
|
|
|
void ff_aacdec_init_mips(AACContext *c)
|
|
{
|
|
#if HAVE_INLINE_ASM
|
|
#if HAVE_MIPSFPU
|
|
c->imdct_and_windowing = imdct_and_windowing_mips;
|
|
c->apply_ltp = apply_ltp_mips;
|
|
c->update_ltp = update_ltp_mips;
|
|
#endif /* HAVE_MIPSFPU */
|
|
#endif /* HAVE_INLINE_ASM */
|
|
}
|