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rockbox/apps/codecs/libfaad/filtbank.c
Michael Giacomelli 93caf52db5 Use new MDCT library for libfaad. Speeds up AAC-LC by 2.5MHz. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24781 a1c6a512-1295-4272-9138-f99709370657
2010-02-20 00:29:31 +00:00

445 lines
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/*
** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
** Copyright (C) 2003-2004 M. Bakker, Ahead Software AG, http://www.nero.com
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program 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 General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
**
** Any non-GPL usage of this software or parts of this software is strictly
** forbidden.
**
** Commercial non-GPL licensing of this software is possible.
** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
**
** $Id$
**/
#include "common.h"
#include "structs.h"
#include <stdlib.h>
#include <string.h>
#ifdef _WIN32_WCE
#define assert(x)
#else
#include <assert.h>
#endif
#include "filtbank.h"
#include "decoder.h"
#include "syntax.h"
#include "kbd_win.h"
#include "sine_win.h"
/*Windowing functions borrowed from libwmai*/
#ifdef CPU_ARM
static inline
void vector_fmul_add_add(real_t *dst, const real_t *src0, const real_t *src1, const real_t *src2, int len)
{
/* Block sizes are always power of two */
asm volatile (
"0:"
"ldmia %[d]!, {r0, r1};"
"ldmia %[w]!, {r4, r5};"
/* consume the first data and window value so we can use those
* registers again */
"smull r8, r9, r0, r4;"
"ldmia %[src2]!, {r0, r4};"
"add r0, r0, r9, lsl #1;" /* *dst=*dst+(r9<<1)*/
"smull r8, r9, r1, r5;"
"add r1, r4, r9, lsl #1;"
"stmia %[dst]!, {r0, r1};"
"subs %[n], %[n], #2;"
"bne 0b;"
: [d] "+r" (src0), [w] "+r" (src1), [src2] "+r" (src2), [dst] "+r" (dst), [n] "+r" (len)
:
: "r0", "r1", "r4", "r5", "r8", "r9", "memory", "cc");
}
static inline
void vector_fmul_reverse(real_t *dst, const real_t *src0, const real_t *src1,
int len)
{
/* Block sizes are always power of two */
asm volatile (
"add %[s1], %[s1], %[n], lsl #2;"
"0:"
"ldmia %[s0]!, {r0, r1};"
"ldmdb %[s1]!, {r4, r5};"
"smull r8, r9, r0, r5;"
"mov r0, r9, lsl #1;"
"smull r8, r9, r1, r4;"
"mov r1, r9, lsl #1;"
"stmia %[dst]!, {r0, r1};"
"subs %[n], %[n], #2;"
"bne 0b;"
: [s0] "+r" (src0), [s1] "+r" (src1), [dst] "+r" (dst), [n] "+r" (len)
:
: "r0", "r1", "r4", "r5", "r8", "r9", "memory", "cc");
}
#elif defined(CPU_COLDFIRE)
static inline
void vector_fmul_add_add(real_t *dst, const real_t *src0, const real_t *src1, const real_t *src2, int len)
{
/* Block sizes are always power of two. Smallest block is always way bigger
* than four too.*/
asm volatile (
"0:"
"movem.l (%[src0]), %%d0-%%d3;"
"movem.l (%[src1]), %%d4-%%d5/%%a0-%%a1;"
"mac.l %%d0, %%d4, %%acc0;"
"mac.l %%d1, %%d5, %%acc1;"
"mac.l %%d2, %%a0, %%acc2;"
"mac.l %%d3, %%a1, %%acc3;"
"lea.l (16, %[src0]), %[src0];"
"lea.l (16, %[src1]), %[src1];"
"movclr.l %%acc0, %%d0;"
"movclr.l %%acc1, %%d1;"
"movclr.l %%acc2, %%d2;"
"movclr.l %%acc3, %%d3;"
"movem.l (%[src2]), %%d4-%%d5/%%a0-%%a1;"
"lea.l (16, %[src2]), %[src2];"
"add.l %%d4, %%d0;"
"add.l %%d5, %%d1;"
"add.l %%a0, %%d2;"
"add.l %%a1, %%d3;"
"movem.l %%d0-%%d3, (%[dst]);"
"lea.l (16, %[dst]), %[dst];"
"subq.l #4, %[n];"
"jne 0b;"
: [src0] "+a" (src0), [src1] "+a" (src1), [src2] "+a" (src2), [dst] "+a" (dst), [n] "+d" (len)
:
: "d0", "d1", "d2", "d3", "d4", "d5", "a0", "a1", "memory", "cc");
}
static inline
void vector_fmul_reverse(real_t *dst, const real_t *src0, const real_t *src1,
int len)
{
/* Block sizes are always power of two. Smallest block is always way bigger
* than four too.*/
asm volatile (
"lea.l (-16, %[s1], %[n]*4), %[s1];"
"0:"
"movem.l (%[s0]), %%d0-%%d3;"
"movem.l (%[s1]), %%d4-%%d5/%%a0-%%a1;"
"mac.l %%d0, %%a1, %%acc0;"
"mac.l %%d1, %%a0, %%acc1;"
"mac.l %%d2, %%d5, %%acc2;"
"mac.l %%d3, %%d4, %%acc3;"
"lea.l (16, %[s0]), %[s0];"
"lea.l (-16, %[s1]), %[s1];"
"movclr.l %%acc0, %%d0;"
"movclr.l %%acc1, %%d1;"
"movclr.l %%acc2, %%d2;"
"movclr.l %%acc3, %%d3;"
"movem.l %%d0-%%d3, (%[dst]);"
"lea.l (16, %[dst]), %[dst];"
"subq.l #4, %[n];"
"jne 0b;"
: [s0] "+a" (src0), [s1] "+a" (src1), [dst] "+a" (dst), [n] "+d" (len)
: : "d0", "d1", "d2", "d3", "d4", "d5", "a0", "a1", "memory", "cc");
}
#else
static inline void vector_fmul_add_add(real_t *dst, const real_t *src0, const real_t *src1, const real_t *src2, int len){
int i;
for(i=0; i<len; i++)
dst[i] = MUL_F(src0[i], src1[i]) + src2[i];
}
static inline void vector_fmul_reverse(real_t *dst, const real_t *src0, const real_t *src1, int len){
int i;
src1 += len-1;
for(i=0; i<len; i++)
dst[i] = MUL_F(src0[i], src1[-i]);
}
#endif
#ifdef LTP_DEC
static INLINE void mdct(fb_info *fb, real_t *in_data, real_t *out_data, uint16_t len)
{
mdct_info *mdct = NULL;
switch (len)
{
case 2048:
case 1920:
mdct = fb->mdct2048;
break;
case 256:
case 240:
mdct = fb->mdct256;
break;
#ifdef LD_DEC
case 1024:
case 960:
mdct = fb->mdct1024;
break;
#endif
}
faad_mdct(mdct, in_data, out_data);
}
#endif
ALIGN real_t transf_buf[2*1024] IBSS_ATTR;
void ifilter_bank(uint8_t window_sequence, uint8_t window_shape,
uint8_t window_shape_prev, real_t *freq_in,
real_t *time_out, real_t *overlap,
uint8_t object_type, uint16_t frame_len)
{
int16_t i;
const real_t *window_long = NULL;
const real_t *window_long_prev = NULL;
const real_t *window_short = NULL;
const real_t *window_short_prev = NULL;
uint16_t nlong = frame_len;
uint16_t nshort = frame_len/8;
uint16_t trans = nshort/2;
uint16_t nflat_ls = (nlong-nshort)/2;
#ifdef PROFILE
int64_t count = faad_get_ts();
#endif
memset(transf_buf,0,sizeof(transf_buf));
/* select windows of current frame and previous frame (Sine or KBD) */
#ifdef LD_DEC
if (object_type == LD)
{
window_long = fb->ld_window[window_shape];
window_long_prev = fb->ld_window[window_shape_prev];
} else {
#else
(void) object_type;
#endif
/*AAC uses two different window shapes depending on spectal features*/
if(window_shape == 0){
window_long = sine_long_1024;
window_short = sine_short_128;
} else {
window_long = kbd_long_1024;
window_short = kbd_short_128;
}
if(window_shape_prev == 0){
window_long_prev = sine_long_1024;
window_short_prev = sine_short_128;
} else {
window_long_prev = kbd_long_1024;
window_short_prev = kbd_short_128;
}
#ifdef LD_DEC
}
#endif
#if 0
for (i = 0; i < 1024; i++)
{
printf("%d\n", freq_in[i]);
}
#endif
#if 0
printf("%d %d\n", window_sequence, window_shape);
#endif
switch (window_sequence)
{
case ONLY_LONG_SEQUENCE:
/* perform iMDCT */
ff_imdct_calc(11, transf_buf, freq_in);
/* add second half output of previous frame to windowed output of current frame */
vector_fmul_add_add(time_out, transf_buf, window_long_prev, overlap, nlong);
/* window the second half and save as overlap for next frame */
vector_fmul_reverse(overlap, transf_buf+nlong, window_long, nlong);
break;
case LONG_START_SEQUENCE:
/* perform iMDCT */
ff_imdct_calc(11, transf_buf, freq_in);
/* add second half output of previous frame to windowed output of current frame */
vector_fmul_add_add(time_out, transf_buf, window_long_prev, overlap, nlong);
/* window the second half and save as overlap for next frame */
/* construct second half window using padding with 1's and 0's */
memcpy(overlap, transf_buf+nlong, nflat_ls*sizeof(real_t));
vector_fmul_reverse(overlap+nflat_ls, transf_buf+nlong+nflat_ls, window_short, nshort);
memset(overlap+nflat_ls+nshort, 0, nflat_ls*sizeof(real_t));
break;
case EIGHT_SHORT_SEQUENCE:
/*this could be assemblerized too, but this case is extremely uncommon*/
/* perform iMDCT for each short block */
ff_imdct_calc(8, transf_buf+2*nshort*0, freq_in+0*nshort);
ff_imdct_calc(8, transf_buf+2*nshort*1, freq_in+1*nshort);
ff_imdct_calc(8, transf_buf+2*nshort*2, freq_in+2*nshort);
ff_imdct_calc(8, transf_buf+2*nshort*3, freq_in+3*nshort);
ff_imdct_calc(8, transf_buf+2*nshort*4, freq_in+4*nshort);
ff_imdct_calc(8, transf_buf+2*nshort*5, freq_in+5*nshort);
ff_imdct_calc(8, transf_buf+2*nshort*6, freq_in+6*nshort);
ff_imdct_calc(8, transf_buf+2*nshort*7, freq_in+7*nshort);
/* add second half output of previous frame to windowed output of current frame */
for (i = 0; i < nflat_ls; i++)
time_out[i] = overlap[i];
for(i = 0; i < nshort; i++)
{
time_out[nflat_ls+ i] = overlap[nflat_ls+ i] + MUL_F(transf_buf[nshort*0+i],window_short_prev[i]);
time_out[nflat_ls+1*nshort+i] = overlap[nflat_ls+nshort*1+i] + MUL_F(transf_buf[nshort*1+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*2+i],window_short[i]);
time_out[nflat_ls+2*nshort+i] = overlap[nflat_ls+nshort*2+i] + MUL_F(transf_buf[nshort*3+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*4+i],window_short[i]);
time_out[nflat_ls+3*nshort+i] = overlap[nflat_ls+nshort*3+i] + MUL_F(transf_buf[nshort*5+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*6+i],window_short[i]);
if (i < trans)
time_out[nflat_ls+4*nshort+i] = overlap[nflat_ls+nshort*4+i] + MUL_F(transf_buf[nshort*7+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*8+i],window_short[i]);
}
/* window the second half and save as overlap for next frame */
for(i = 0; i < nshort; i++)
{
if (i >= trans)
overlap[nflat_ls+4*nshort+i-nlong] = MUL_F(transf_buf[nshort*7+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*8+i],window_short[i]);
overlap[nflat_ls+5*nshort+i-nlong] = MUL_F(transf_buf[nshort*9+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*10+i],window_short[i]);
overlap[nflat_ls+6*nshort+i-nlong] = MUL_F(transf_buf[nshort*11+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*12+i],window_short[i]);
overlap[nflat_ls+7*nshort+i-nlong] = MUL_F(transf_buf[nshort*13+i],window_short[nshort-1-i]) + MUL_F(transf_buf[nshort*14+i],window_short[i]);
overlap[nflat_ls+8*nshort+i-nlong] = MUL_F(transf_buf[nshort*15+i],window_short[nshort-1-i]);
}
memset(overlap+nflat_ls+nshort, 0, nflat_ls*sizeof(real_t));
break;
case LONG_STOP_SEQUENCE:
/* perform iMDCT */
ff_imdct_calc(11, transf_buf, freq_in);
/* add second half output of previous frame to windowed output of current frame */
/* construct first half window using padding with 1's and 0's */
memcpy(time_out, overlap, nflat_ls*sizeof(real_t));
vector_fmul_add_add(time_out+nflat_ls, transf_buf+nflat_ls, window_short_prev, overlap+nflat_ls, nshort);
for (i = 0; i < nflat_ls; i++)
time_out[nflat_ls+nshort+i] = overlap[nflat_ls+nshort+i] + transf_buf[nflat_ls+nshort+i];
/* window the second half and save as overlap for next frame */
vector_fmul_reverse(overlap, transf_buf+nlong, window_long, nlong);
break;
}
#if 0
for (i = 0; i < 1024; i++)
{
printf("%d\n", time_out[i]);
//printf("0x%.8X\n", time_out[i]);
}
#endif
#ifdef PROFILE
count = faad_get_ts() - count;
fb->cycles += count;
#endif
}
#ifdef LTP_DEC
ALIGN real_t windowed_buf[2*1024] = {0};
/* only works for LTP -> no overlapping, no short blocks */
void filter_bank_ltp(fb_info *fb, uint8_t window_sequence, uint8_t window_shape,
uint8_t window_shape_prev, real_t *in_data, real_t *out_mdct,
uint8_t object_type, uint16_t frame_len)
{
int16_t i;
const real_t *window_long = NULL;
const real_t *window_long_prev = NULL;
const real_t *window_short = NULL;
const real_t *window_short_prev = NULL;
uint16_t nlong = frame_len;
uint16_t nshort = frame_len/8;
uint16_t nflat_ls = (nlong-nshort)/2;
//assert(window_sequence != EIGHT_SHORT_SEQUENCE);
memset(windowed_buf,0,sizeof(windowed_buf));
#ifdef LD_DEC
if (object_type == LD)
{
window_long = fb->ld_window[window_shape];
window_long_prev = fb->ld_window[window_shape_prev];
} else {
#else
(void) object_type;
#endif
window_long = fb->long_window[window_shape];
window_long_prev = fb->long_window[window_shape_prev];
window_short = fb->short_window[window_shape];
window_short_prev = fb->short_window[window_shape_prev];
#ifdef LD_DEC
}
#endif
switch(window_sequence)
{
case ONLY_LONG_SEQUENCE:
for (i = nlong-1; i >= 0; i--)
{
windowed_buf[i] = MUL_F(in_data[i], window_long_prev[i]);
windowed_buf[i+nlong] = MUL_F(in_data[i+nlong], window_long[nlong-1-i]);
}
mdct(fb, windowed_buf, out_mdct, 2*nlong);
break;
case LONG_START_SEQUENCE:
for (i = 0; i < nlong; i++)
windowed_buf[i] = MUL_F(in_data[i], window_long_prev[i]);
for (i = 0; i < nflat_ls; i++)
windowed_buf[i+nlong] = in_data[i+nlong];
for (i = 0; i < nshort; i++)
windowed_buf[i+nlong+nflat_ls] = MUL_F(in_data[i+nlong+nflat_ls], window_short[nshort-1-i]);
for (i = 0; i < nflat_ls; i++)
windowed_buf[i+nlong+nflat_ls+nshort] = 0;
mdct(fb, windowed_buf, out_mdct, 2*nlong);
break;
case LONG_STOP_SEQUENCE:
for (i = 0; i < nflat_ls; i++)
windowed_buf[i] = 0;
for (i = 0; i < nshort; i++)
windowed_buf[i+nflat_ls] = MUL_F(in_data[i+nflat_ls], window_short_prev[i]);
for (i = 0; i < nflat_ls; i++)
windowed_buf[i+nflat_ls+nshort] = in_data[i+nflat_ls+nshort];
for (i = 0; i < nlong; i++)
windowed_buf[i+nlong] = MUL_F(in_data[i+nlong], window_long[nlong-1-i]);
mdct(fb, windowed_buf, out_mdct, 2*nlong);
break;
}
}
#endif
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