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rockbox/apps/codecs/libmad/synth.c
Michael Giacomelli 0e53651062 Force alignment of various data structures in libmad. Speeds up Gigabeat S decoding by about 1MHz. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28639 a1c6a512-1295-4272-9138-f99709370657
2010-11-22 02:51:13 +00:00

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/*
* libmad - MPEG audio decoder library
* Copyright (C) 2000-2004 Underbit Technologies, Inc.
*
* 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
*
* $Id$
*/
# ifdef HAVE_CONFIG_H
# include "config.h"
# endif
# include "global.h"
# include "fixed.h"
# include "frame.h"
# include "synth.h"
/*
* NAME: synth->init()
* DESCRIPTION: initialize synth struct
*/
void mad_synth_init(struct mad_synth *synth)
{
mad_synth_mute(synth);
synth->phase = 0;
synth->pcm.samplerate = 0;
synth->pcm.channels = 0;
synth->pcm.length = 0;
#if defined(CPU_COLDFIRE)
/* init the emac unit here, since this function should always be called
before using libmad */
coldfire_set_macsr(EMAC_FRACTIONAL | EMAC_SATURATE | EMAC_ROUND);
#endif
}
/*
* NAME: synth->mute()
* DESCRIPTION: zero all polyphase filterbank values, resetting synthesis
*/
void mad_synth_mute(struct mad_synth *synth)
{
memset(synth->filter, 0, sizeof(synth->filter));
}
#if 0 /* dct32 asm implementation is slower on current arm systems */
/* #ifdef FPM_ARM */
void dct32(mad_fixed_t const in[32], unsigned int slot,
mad_fixed_t lo[16][8], mad_fixed_t hi[16][8]);
#else
/*
* An optional optimization called here the Subband Synthesis Optimization
* (SSO) improves the performance of subband synthesis at the expense of
* accuracy.
*
* The idea is to simplify 32x32->64-bit multiplication to 32x32->32 such
* that extra scaling and rounding are not necessary. This often allows the
* compiler to use faster 32-bit multiply-accumulate instructions instead of
* explicit 64-bit multiply, shift, and add instructions.
*
* SSO works like this: a full 32x32->64-bit multiply of two mad_fixed_t
* values requires the result to be right-shifted 28 bits to be properly
* scaled to the same fixed-point format. Right shifts can be applied at any
* time to either operand or to the result, so the optimization involves
* careful placement of these shifts to minimize the loss of accuracy.
*
* First, a 14-bit shift is applied with rounding at compile-time to the D[]
* table of coefficients for the subband synthesis window. This only loses 2
* bits of accuracy because the lower 12 bits are always zero. A second
* 12-bit shift occurs after the DCT calculation. This loses 12 bits of
* accuracy. Finally, a third 2-bit shift occurs just before the sample is
* saved in the PCM buffer. 14 + 12 + 2 == 28 bits.
*/
/* FPM_DEFAULT without OPT_SSO will actually not work. */
# if defined(FPM_DEFAULT) && !defined(OPT_SSO)
# define OPT_SSO
# endif
/* second SSO shift, with rounding */
# if defined(OPT_SSO)
# define SHIFT(x) (((x) + (1L << 11)) >> 12)
# else
# define SHIFT(x) (x)
# endif
/* possible DCT speed optimization */
# if defined(FPM_COLDFIRE_EMAC)
/* This is a Coldfire version of the OPT_SPEED optimisation below, but in the
case of Coldfire it does not loose additional precision. */
# define MUL(x, y) \
({ \
mad_fixed64hi_t hi; \
asm volatile("mac.l %[a], %[b], %%acc0\n\t" \
"movclr.l %%acc0, %[hi]" \
: [hi] "=r" (hi) \
: [a] "r" ((x)), [b] "r" ((y))); \
hi; \
})
# elif defined(FPM_ARM)
/* This is an ARM version of the OPT_SPEED optimisation below. This
implementation will loose 1 bit of accuracy. */
# define MUL(x, y) \
({ \
mad_fixed64lo_t lo; \
mad_fixed64hi_t hi; \
asm volatile ( \
"smull %[lo], %[hi], %[a], %[b]\n\t" /* hi = result */ \
"mov %[hi], %[hi], lsl #1" /* hi <<= 1 */ \
: [lo]"=&r"(lo), [hi]"=&r"(hi) \
: [a]"r"(x), [b]"r"(y)); \
hi; \
})
# elif defined(OPT_SPEED) && defined(MAD_F_MLX)
# define MUL(x, y) \
({ mad_fixed64hi_t hi; \
mad_fixed64lo_t lo; \
MAD_F_MLX(hi, lo, (x), (y)); \
hi << (32 - MAD_F_SCALEBITS - 3); \
})
# else
# define MUL(x, y) mad_f_mul((x), (y>>3))
# endif
/*
* NAME: dct32()
* DESCRIPTION: perform fast in[32]->out[32] DCT
*/
static
void dct32(mad_fixed_t const in[32], unsigned int slot,
mad_fixed_t lo[16][8], mad_fixed_t hi[16][8])
{
mad_fixed_t t0, t1, t2, t3, t4, t5, t6, t7;
mad_fixed_t t8, t9, t10, t11, t12, t13, t14, t15;
mad_fixed_t t16, t17, t18, t19, t20, t21, t22, t23;
mad_fixed_t t24, t25, t26, t27, t28, t29, t30, t31;
mad_fixed_t t32, t33, t34, t35, t36, t37, t38, t39;
mad_fixed_t t40, t41, t42, t43, t44, t45, t46, t47;
mad_fixed_t t48, t49, t50, t51, t52, t53, t54, t55;
mad_fixed_t t56, t57, t58, t59, t60, t61, t62, t63;
mad_fixed_t t64, t65, t66, t67, t68, t69, t70, t71;
mad_fixed_t t72, t73, t74, t75, t76, t77, t78, t79;
mad_fixed_t t80, t81, t82, t83, t84, t85, t86, t87;
mad_fixed_t t88, t89, t90, t91, t92, t93, t94, t95;
mad_fixed_t t96, t97, t98, t99, t100, t101, t102, t103;
mad_fixed_t t104, t105, t106, t107, t108, t109, t110, t111;
mad_fixed_t t112, t113, t114, t115, t116, t117, t118, t119;
mad_fixed_t t120, t121, t122, t123, t124, t125, t126, t127;
mad_fixed_t t128, t129, t130, t131, t132, t133, t134, t135;
mad_fixed_t t136, t137, t138, t139, t140, t141, t142, t143;
mad_fixed_t t144, t145, t146, t147, t148, t149, t150, t151;
mad_fixed_t t152, t153, t154, t155, t156, t157, t158, t159;
mad_fixed_t t160, t161, t162, t163, t164, t165, t166, t167;
mad_fixed_t t168, t169, t170, t171, t172, t173, t174, t175;
mad_fixed_t t176;
/* costab[i] = cos(PI / (2 * 32) * i) */
#define costab1 MAD_F(0x7fd8878e) /* 0.998795456 */
#define costab2 MAD_F(0x7f62368f) /* 0.995184727 */
#define costab3 MAD_F(0x7e9d55fc) /* 0.989176510 */
#define costab4 MAD_F(0x7d8a5f40) /* 0.980785280 */
#define costab5 MAD_F(0x7c29fbee) /* 0.970031253 */
#define costab6 MAD_F(0x7a7d055b) /* 0.956940336 */
#define costab7 MAD_F(0x78848414) /* 0.941544065 */
#define costab8 MAD_F(0x7641af3d) /* 0.923879533 */
#define costab9 MAD_F(0x73b5ebd1) /* 0.903989293 */
#define costab10 MAD_F(0x70e2cbc6) /* 0.881921264 */
#define costab11 MAD_F(0x6dca0d14) /* 0.857728610 */
#define costab12 MAD_F(0x6a5d98a4) /* 0.831469612 */
#define costab13 MAD_F(0x66cf8120) /* 0.803207531 */
#define costab14 MAD_F(0x62f201ac) /* 0.773010453 */
#define costab15 MAD_F(0x5ed77c8a) /* 0.740951125 */
#define costab16 MAD_F(0x5a82799a) /* 0.707106781 */
#define costab17 MAD_F(0x55f5a4d2) /* 0.671558955 */
#define costab18 MAD_F(0x5133cc94) /* 0.634393284 */
#define costab19 MAD_F(0x4c3fdff4) /* 0.595699304 */
#define costab20 MAD_F(0x471cece7) /* 0.555570233 */
#define costab21 MAD_F(0x41ce1e65) /* 0.514102744 */
#define costab22 MAD_F(0x3c56ba70) /* 0.471396737 */
#define costab23 MAD_F(0x36ba2014) /* 0.427555093 */
#define costab24 MAD_F(0x30fbc54d) /* 0.382683432 */
#define costab25 MAD_F(0x2b1f34eb) /* 0.336889853 */
#define costab26 MAD_F(0x25280c5e) /* 0.290284677 */
#define costab27 MAD_F(0x1f19f97b) /* 0.242980180 */
#define costab28 MAD_F(0x18f8b83c) /* 0.195090322 */
#define costab29 MAD_F(0x12c8106f) /* 0.146730474 */
#define costab30 MAD_F(0x0c8bd35e) /* 0.098017140 */
#define costab31 MAD_F(0x0647d97c) /* 0.049067674 */
t0 = in[0] + in[31]; t16 = MUL(in[0] - in[31], costab1);
t1 = in[15] + in[16]; t17 = MUL(in[15] - in[16], costab31);
t41 = t16 + t17;
t59 = MUL(t16 - t17, costab2);
t33 = t0 + t1;
t50 = MUL(t0 - t1, costab2);
t2 = in[7] + in[24]; t18 = MUL(in[7] - in[24], costab15);
t3 = in[8] + in[23]; t19 = MUL(in[8] - in[23], costab17);
t42 = t18 + t19;
t60 = MUL(t18 - t19, costab30);
t34 = t2 + t3;
t51 = MUL(t2 - t3, costab30);
t4 = in[3] + in[28]; t20 = MUL(in[3] - in[28], costab7);
t5 = in[12] + in[19]; t21 = MUL(in[12] - in[19], costab25);
t43 = t20 + t21;
t61 = MUL(t20 - t21, costab14);
t35 = t4 + t5;
t52 = MUL(t4 - t5, costab14);
t6 = in[4] + in[27]; t22 = MUL(in[4] - in[27], costab9);
t7 = in[11] + in[20]; t23 = MUL(in[11] - in[20], costab23);
t44 = t22 + t23;
t62 = MUL(t22 - t23, costab18);
t36 = t6 + t7;
t53 = MUL(t6 - t7, costab18);
t8 = in[1] + in[30]; t24 = MUL(in[1] - in[30], costab3);
t9 = in[14] + in[17]; t25 = MUL(in[14] - in[17], costab29);
t45 = t24 + t25;
t63 = MUL(t24 - t25, costab6);
t37 = t8 + t9;
t54 = MUL(t8 - t9, costab6);
t10 = in[6] + in[25]; t26 = MUL(in[6] - in[25], costab13);
t11 = in[9] + in[22]; t27 = MUL(in[9] - in[22], costab19);
t46 = t26 + t27;
t64 = MUL(t26 - t27, costab26);
t38 = t10 + t11;
t55 = MUL(t10 - t11, costab26);
t12 = in[2] + in[29]; t28 = MUL(in[2] - in[29], costab5);
t13 = in[13] + in[18]; t29 = MUL(in[13] - in[18], costab27);
t47 = t28 + t29;
t65 = MUL(t28 - t29, costab10);
t39 = t12 + t13;
t56 = MUL(t12 - t13, costab10);
t14 = in[5] + in[26]; t30 = MUL(in[5] - in[26], costab11);
t15 = in[10] + in[21]; t31 = MUL(in[10] - in[21], costab21);
t48 = t30 + t31;
t66 = MUL(t30 - t31, costab22);
t40 = t14 + t15;
t57 = MUL(t14 - t15, costab22);
t69 = t33 + t34; t89 = MUL(t33 - t34, costab4);
t70 = t35 + t36; t90 = MUL(t35 - t36, costab28);
t71 = t37 + t38; t91 = MUL(t37 - t38, costab12);
t72 = t39 + t40; t92 = MUL(t39 - t40, costab20);
t73 = t41 + t42; t94 = MUL(t41 - t42, costab4);
t74 = t43 + t44; t95 = MUL(t43 - t44, costab28);
t75 = t45 + t46; t96 = MUL(t45 - t46, costab12);
t76 = t47 + t48; t97 = MUL(t47 - t48, costab20);
t78 = t50 + t51; t100 = MUL(t50 - t51, costab4);
t79 = t52 + t53; t101 = MUL(t52 - t53, costab28);
t80 = t54 + t55; t102 = MUL(t54 - t55, costab12);
t81 = t56 + t57; t103 = MUL(t56 - t57, costab20);
t83 = t59 + t60; t106 = MUL(t59 - t60, costab4);
t84 = t61 + t62; t107 = MUL(t61 - t62, costab28);
t85 = t63 + t64; t108 = MUL(t63 - t64, costab12);
t86 = t65 + t66; t109 = MUL(t65 - t66, costab20);
t113 = t69 + t70;
t114 = t71 + t72;
/* 0 */ hi[15][slot] = SHIFT(t113 + t114);
/* 16 */ lo[ 0][slot] = SHIFT(MUL(t113 - t114, costab16));
t115 = t73 + t74;
t116 = t75 + t76;
t32 = t115 + t116;
/* 1 */ hi[14][slot] = SHIFT(t32);
t118 = t78 + t79;
t119 = t80 + t81;
t58 = t118 + t119;
/* 2 */ hi[13][slot] = SHIFT(t58);
t121 = t83 + t84;
t122 = t85 + t86;
t67 = t121 + t122;
t49 = (t67 * 2) - t32;
/* 3 */ hi[12][slot] = SHIFT(t49);
t125 = t89 + t90;
t126 = t91 + t92;
t93 = t125 + t126;
/* 4 */ hi[11][slot] = SHIFT(t93);
t128 = t94 + t95;
t129 = t96 + t97;
t98 = t128 + t129;
t68 = (t98 * 2) - t49;
/* 5 */ hi[10][slot] = SHIFT(t68);
t132 = t100 + t101;
t133 = t102 + t103;
t104 = t132 + t133;
t82 = (t104 * 2) - t58;
/* 6 */ hi[ 9][slot] = SHIFT(t82);
t136 = t106 + t107;
t137 = t108 + t109;
t110 = t136 + t137;
t87 = (t110 * 2) - t67;
t77 = (t87 * 2) - t68;
/* 7 */ hi[ 8][slot] = SHIFT(t77);
t141 = MUL(t69 - t70, costab8);
t142 = MUL(t71 - t72, costab24);
t143 = t141 + t142;
/* 8 */ hi[ 7][slot] = SHIFT(t143);
/* 24 */ lo[ 8][slot] =
SHIFT((MUL(t141 - t142, costab16) * 2) - t143);
t144 = MUL(t73 - t74, costab8);
t145 = MUL(t75 - t76, costab24);
t146 = t144 + t145;
t88 = (t146 * 2) - t77;
/* 9 */ hi[ 6][slot] = SHIFT(t88);
t148 = MUL(t78 - t79, costab8);
t149 = MUL(t80 - t81, costab24);
t150 = t148 + t149;
t105 = (t150 * 2) - t82;
/* 10 */ hi[ 5][slot] = SHIFT(t105);
t152 = MUL(t83 - t84, costab8);
t153 = MUL(t85 - t86, costab24);
t154 = t152 + t153;
t111 = (t154 * 2) - t87;
t99 = (t111 * 2) - t88;
/* 11 */ hi[ 4][slot] = SHIFT(t99);
t157 = MUL(t89 - t90, costab8);
t158 = MUL(t91 - t92, costab24);
t159 = t157 + t158;
t127 = (t159 * 2) - t93;
/* 12 */ hi[ 3][slot] = SHIFT(t127);
t160 = (MUL(t125 - t126, costab16) * 2) - t127;
/* 20 */ lo[ 4][slot] = SHIFT(t160);
/* 28 */ lo[12][slot] =
SHIFT((((MUL(t157 - t158, costab16) * 2) - t159) * 2) - t160);
t161 = MUL(t94 - t95, costab8);
t162 = MUL(t96 - t97, costab24);
t163 = t161 + t162;
t130 = (t163 * 2) - t98;
t112 = (t130 * 2) - t99;
/* 13 */ hi[ 2][slot] = SHIFT(t112);
t164 = (MUL(t128 - t129, costab16) * 2) - t130;
t166 = MUL(t100 - t101, costab8);
t167 = MUL(t102 - t103, costab24);
t168 = t166 + t167;
t134 = (t168 * 2) - t104;
t120 = (t134 * 2) - t105;
/* 14 */ hi[ 1][slot] = SHIFT(t120);
t135 = (MUL(t118 - t119, costab16) * 2) - t120;
/* 18 */ lo[ 2][slot] = SHIFT(t135);
t169 = (MUL(t132 - t133, costab16) * 2) - t134;
t151 = (t169 * 2) - t135;
/* 22 */ lo[ 6][slot] = SHIFT(t151);
t170 = (((MUL(t148 - t149, costab16) * 2) - t150) * 2) - t151;
/* 26 */ lo[10][slot] = SHIFT(t170);
/* 30 */ lo[14][slot] =
SHIFT((((((MUL(t166 - t167, costab16) * 2) -
t168) * 2) - t169) * 2) - t170);
t171 = MUL(t106 - t107, costab8);
t172 = MUL(t108 - t109, costab24);
t173 = t171 + t172;
t138 = (t173 * 2) - t110;
t123 = (t138 * 2) - t111;
t139 = (MUL(t121 - t122, costab16) * 2) - t123;
t117 = (t123 * 2) - t112;
/* 15 */ hi[ 0][slot] = SHIFT(t117);
t124 = (MUL(t115 - t116, costab16) * 2) - t117;
/* 17 */ lo[ 1][slot] = SHIFT(t124);
t131 = (t139 * 2) - t124;
/* 19 */ lo[ 3][slot] = SHIFT(t131);
t140 = (t164 * 2) - t131;
/* 21 */ lo[ 5][slot] = SHIFT(t140);
t174 = (MUL(t136 - t137, costab16) * 2) - t138;
t155 = (t174 * 2) - t139;
t147 = (t155 * 2) - t140;
/* 23 */ lo[ 7][slot] = SHIFT(t147);
t156 = (((MUL(t144 - t145, costab16) * 2) - t146) * 2) - t147;
/* 25 */ lo[ 9][slot] = SHIFT(t156);
t175 = (((MUL(t152 - t153, costab16) * 2) - t154) * 2) - t155;
t165 = (t175 * 2) - t156;
/* 27 */ lo[11][slot] = SHIFT(t165);
t176 = (((((MUL(t161 - t162, costab16) * 2) -
t163) * 2) - t164) * 2) - t165;
/* 29 */ lo[13][slot] = SHIFT(t176);
/* 31 */ lo[15][slot] =
SHIFT((((((((MUL(t171 - t172, costab16) * 2) -
t173) * 2) - t174) * 2) - t175) * 2) - t176);
/*
* Totals:
* 80 multiplies
* 80 additions
* 119 subtractions
* 49 shifts (not counting SSO)
*/
}
# undef MUL
# undef SHIFT
#endif
/* third SSO shift and/or D[] optimization preshift */
# if defined(OPT_SSO)
# if MAD_F_FRACBITS != 28
# error "MAD_F_FRACBITS must be 28 to use OPT_SSO"
# endif
# define ML0(hi, lo, x, y) ((lo) = (x) * (y))
# define MLA(hi, lo, x, y) ((lo) += (x) * (y))
# define MLN(hi, lo) ((lo) = -(lo))
# define MLZ(hi, lo) ((void) (hi), (mad_fixed_t) (lo))
# define SHIFT(x) ((x) >> 2)
# define PRESHIFT(x) ((MAD_F(x) + (1L << 13)) >> 14)
# else
# define ML0(hi, lo, x, y) MAD_F_ML0((hi), (lo), (x), (y))
# define MLA(hi, lo, x, y) MAD_F_MLA((hi), (lo), (x), (y))
# define MLN(hi, lo) MAD_F_MLN((hi), (lo))
# define MLZ(hi, lo) MAD_F_MLZ((hi), (lo))
# define SHIFT(x) (x)
# if defined(MAD_F_SCALEBITS)
# undef MAD_F_SCALEBITS
# define MAD_F_SCALEBITS (MAD_F_FRACBITS - 12)
# define PRESHIFT(x) (MAD_F(x) >> 12)
# else
# define PRESHIFT(x) MAD_F(x)
# endif
# endif
static
mad_fixed_t const D[17][32] ICONST_ATTR MEM_ALIGN_ATTR = {
# include "D.dat"
};
/*
* NAME: synth->full()
* DESCRIPTION: perform full frequency PCM synthesis
*/
/* optimised version of synth_full */
# ifdef FPM_COLDFIRE_EMAC
#define SYNTH_EMAC1(res, f1, pD) \
asm volatile( \
"movem.l (%0), %%d0-%%d7 \n\t" \
"move.l (%1), %%a5 \n\t" \
"mac.l %%d0, %%a5, 56(%1), %%a5, %%acc0\n\t" \
"mac.l %%d1, %%a5, 48(%1), %%a5, %%acc0\n\t" \
"mac.l %%d2, %%a5, 40(%1), %%a5, %%acc0\n\t" \
"mac.l %%d3, %%a5, 32(%1), %%a5, %%acc0\n\t" \
"mac.l %%d4, %%a5, 24(%1), %%a5, %%acc0\n\t" \
"mac.l %%d5, %%a5, 16(%1), %%a5, %%acc0\n\t" \
"mac.l %%d6, %%a5, 8(%1), %%a5, %%acc0\n\t" \
"mac.l %%d7, %%a5, %%acc0\n\t" \
: \
: "a" (*f1), "a" (*pD) \
: "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", "a5"); \
asm volatile ( \
"movclr.l %%acc0, %0 \n\t" \
: "=d" (res));
#define SYNTH_EMAC2(res, f1, f2, pD) \
asm volatile( \
"movem.l (%0), %%d0-%%d7 \n\t" \
"move.l 4(%1), %%a5 \n\t" \
"msac.l %%d0, %%a5, 60(%1), %%a5, %%acc0\n\t" \
"msac.l %%d1, %%a5, 52(%1), %%a5, %%acc0\n\t" \
"msac.l %%d2, %%a5, 44(%1), %%a5, %%acc0\n\t" \
"msac.l %%d3, %%a5, 36(%1), %%a5, %%acc0\n\t" \
"msac.l %%d4, %%a5, 28(%1), %%a5, %%acc0\n\t" \
"msac.l %%d5, %%a5, 20(%1), %%a5, %%acc0\n\t" \
"msac.l %%d6, %%a5, 12(%1), %%a5, %%acc0\n\t" \
"msac.l %%d7, %%a5, (%1), %%a5, %%acc0\n\t" \
"movem.l (%2), %%d0-%%d7 \n\t" \
"mac.l %%d0, %%a5, 56(%1), %%a5, %%acc0\n\t" \
"mac.l %%d1, %%a5, 48(%1), %%a5, %%acc0\n\t" \
"mac.l %%d2, %%a5, 40(%1), %%a5, %%acc0\n\t" \
"mac.l %%d3, %%a5, 32(%1), %%a5, %%acc0\n\t" \
"mac.l %%d4, %%a5, 24(%1), %%a5, %%acc0\n\t" \
"mac.l %%d5, %%a5, 16(%1), %%a5, %%acc0\n\t" \
"mac.l %%d6, %%a5, 8(%1), %%a5, %%acc0\n\t" \
"mac.l %%d7, %%a5, %%acc0\n\t" \
: \
: "a" (*f1), "a" (*pD), "a" (*f2) \
: "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", "a5", "memory"); \
asm volatile ( \
"movclr.l %%acc0, %0 \n\t" \
: "=d" (res));
#define SYNTH_EMAC_ODD_SBSAMPLE(f1, f2, pD1, pD2, res1, res2) \
asm volatile ( \
"movem.l (%0), %%d0-%%d7 \n\t" \
"move.l 4(%2), %%a5 \n\t" \
"msac.l %%d0, %%a5, 60(%2), %%a5, %%acc0\n\t" \
"msac.l %%d1, %%a5, 52(%2), %%a5, %%acc0\n\t" \
"msac.l %%d2, %%a5, 44(%2), %%a5, %%acc0\n\t" \
"msac.l %%d3, %%a5, 36(%2), %%a5, %%acc0\n\t" \
"msac.l %%d4, %%a5, 28(%2), %%a5, %%acc0\n\t" \
"msac.l %%d5, %%a5, 20(%2), %%a5, %%acc0\n\t" \
"msac.l %%d6, %%a5, 12(%2), %%a5, %%acc0\n\t" \
"msac.l %%d7, %%a5, 112(%3), %%a5, %%acc0\n\t" \
"mac.l %%d7, %%a5, 104(%3), %%a5, %%acc1\n\t" \
"mac.l %%d6, %%a5, 96(%3), %%a5, %%acc1\n\t" \
"mac.l %%d5, %%a5, 88(%3), %%a5, %%acc1\n\t" \
"mac.l %%d4, %%a5, 80(%3), %%a5, %%acc1\n\t" \
"mac.l %%d3, %%a5, 72(%3), %%a5, %%acc1\n\t" \
"mac.l %%d2, %%a5, 64(%3), %%a5, %%acc1\n\t" \
"mac.l %%d1, %%a5, 120(%3), %%a5, %%acc1\n\t" \
"mac.l %%d0, %%a5, 8(%2), %%a5, %%acc1\n\t" \
"movem.l (%1), %%d0-%%d7 \n\t" \
"mac.l %%d7, %%a5, 16(%2), %%a5, %%acc0\n\t" \
"mac.l %%d6, %%a5, 24(%2), %%a5, %%acc0\n\t" \
"mac.l %%d5, %%a5, 32(%2), %%a5, %%acc0\n\t" \
"mac.l %%d4, %%a5, 40(%2), %%a5, %%acc0\n\t" \
"mac.l %%d3, %%a5, 48(%2), %%a5, %%acc0\n\t" \
"mac.l %%d2, %%a5, 56(%2), %%a5, %%acc0\n\t" \
"mac.l %%d1, %%a5, (%2), %%a5, %%acc0\n\t" \
"mac.l %%d0, %%a5, 60(%3), %%a5, %%acc0\n\t" \
"mac.l %%d0, %%a5, 68(%3), %%a5, %%acc1\n\t" \
"mac.l %%d1, %%a5, 76(%3), %%a5, %%acc1\n\t" \
"mac.l %%d2, %%a5, 84(%3), %%a5, %%acc1\n\t" \
"mac.l %%d3, %%a5, 92(%3), %%a5, %%acc1\n\t" \
"mac.l %%d4, %%a5, 100(%3), %%a5, %%acc1\n\t" \
"mac.l %%d5, %%a5, 108(%3), %%a5, %%acc1\n\t" \
"mac.l %%d6, %%a5, 116(%3), %%a5, %%acc1\n\t" \
"mac.l %%d7, %%a5, %%acc1\n\t" \
: \
: "a" (*f1), "a" (*f2), "a" (*pD1), "a" (*pD2) \
: "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", "a5", "memory"); \
asm volatile( \
"movclr.l %%acc0, %0\n\t" \
"movclr.l %%acc1, %1\n\t" \
: "=d" (res1), "=d" (res2) );
#define SYNTH_EMAC_EVEN_SBSAMPLE(f1, f2, pD1, pD2, res1, res2) \
asm volatile ( \
"movem.l (%0), %%d0-%%d7 \n\t" \
"move.l (%2), %%a5 \n\t" \
"msac.l %%d0, %%a5, 56(%2), %%a5, %%acc0\n\t" \
"msac.l %%d1, %%a5, 48(%2), %%a5, %%acc0\n\t" \
"msac.l %%d2, %%a5, 40(%2), %%a5, %%acc0\n\t" \
"msac.l %%d3, %%a5, 32(%2), %%a5, %%acc0\n\t" \
"msac.l %%d4, %%a5, 24(%2), %%a5, %%acc0\n\t" \
"msac.l %%d5, %%a5, 16(%2), %%a5, %%acc0\n\t" \
"msac.l %%d6, %%a5, 8(%2), %%a5, %%acc0\n\t" \
"msac.l %%d7, %%a5, 116(%3), %%a5, %%acc0\n\t" \
"mac.l %%d7, %%a5, 108(%3), %%a5, %%acc1\n\t" \
"mac.l %%d6, %%a5, 100(%3), %%a5, %%acc1\n\t" \
"mac.l %%d5, %%a5, 92(%3), %%a5, %%acc1\n\t" \
"mac.l %%d4, %%a5, 84(%3), %%a5, %%acc1\n\t" \
"mac.l %%d3, %%a5, 76(%3), %%a5, %%acc1\n\t" \
"mac.l %%d2, %%a5, 68(%3), %%a5, %%acc1\n\t" \
"mac.l %%d1, %%a5, 60(%3), %%a5, %%acc1\n\t" \
"mac.l %%d0, %%a5, 12(%2), %%a5, %%acc1\n\t" \
"movem.l (%1), %%d0-%%d7 \n\t" \
"mac.l %%d7, %%a5, 20(%2), %%a5, %%acc0\n\t" \
"mac.l %%d6, %%a5, 28(%2), %%a5, %%acc0\n\t" \
"mac.l %%d5, %%a5, 36(%2), %%a5, %%acc0\n\t" \
"mac.l %%d4, %%a5, 44(%2), %%a5, %%acc0\n\t" \
"mac.l %%d3, %%a5, 52(%2), %%a5, %%acc0\n\t" \
"mac.l %%d2, %%a5, 60(%2), %%a5, %%acc0\n\t" \
"mac.l %%d1, %%a5, 4(%2), %%a5, %%acc0\n\t" \
"mac.l %%d0, %%a5, 120(%3), %%a5, %%acc0\n\t" \
"mac.l %%d0, %%a5, 64(%3), %%a5, %%acc1\n\t" \
"mac.l %%d1, %%a5, 72(%3), %%a5, %%acc1\n\t" \
"mac.l %%d2, %%a5, 80(%3), %%a5, %%acc1\n\t" \
"mac.l %%d3, %%a5, 88(%3), %%a5, %%acc1\n\t" \
"mac.l %%d4, %%a5, 96(%3), %%a5, %%acc1\n\t" \
"mac.l %%d5, %%a5, 104(%3), %%a5, %%acc1\n\t" \
"mac.l %%d6, %%a5, 112(%3), %%a5, %%acc1\n\t" \
"mac.l %%d7, %%a5, %%acc1\n\t" \
: \
: "a" (*f1), "a" (*f2), "a" (*pD1), "a" (*pD2) \
: "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", "a5", "memory"); \
asm volatile( \
"movclr.l %%acc0, %0\n\t" \
"movclr.l %%acc1, %1\n\t" \
: "=d" (res1), "=d" (res2) );
static
void synth_full(struct mad_synth *synth, struct mad_frame const *frame,
unsigned int nch, unsigned int ns)
{
int sb;
unsigned int phase, ch, s, p;
mad_fixed_t *pcm, (*filter)[2][2][16][8];
mad_fixed_t (*sbsample)[36][32];
mad_fixed_t (*fe)[8], (*fx)[8], (*fo)[8];
mad_fixed_t const (*D0ptr)[32];
mad_fixed_t const (*D1ptr)[32];
mad_fixed64hi_t hi0, hi1;
for (ch = 0; ch < nch; ++ch) {
sbsample = &(*frame->sbsample_prev)[ch];
filter = &synth->filter[ch];
phase = synth->phase;
pcm = synth->pcm.samples[ch];
for (s = 0; s < ns; ++s) {
dct32((*sbsample)[s], phase >> 1,
(*filter)[0][phase & 1], (*filter)[1][phase & 1]);
p = (phase - 1) & 0xf;
/* calculate 32 samples */
fe = &(*filter)[0][ phase & 1][0];
fx = &(*filter)[0][~phase & 1][0];
fo = &(*filter)[1][~phase & 1][0];
D0ptr = (void*)&D[0][ p];
D1ptr = (void*)&D[0][-p];
if(s & 1)
{
SYNTH_EMAC2(hi0, fx, fe, D0ptr);
pcm[0] = hi0 << 3; /* shift result to libmad's fixed point format */
pcm += 16;
for (sb = 15; sb; sb--, fo++) {
++fe;
++D0ptr;
++D1ptr;
/* D[32 - sb][i] == -D[sb][31 - i] */
SYNTH_EMAC_ODD_SBSAMPLE(fo, fe, D0ptr, D1ptr, hi0, hi1);
pcm[-sb] = hi0 << 3;
pcm[ sb] = hi1 << 3;
}
++D0ptr;
SYNTH_EMAC1(hi0, fo, D0ptr+1);
pcm[0] = -(hi0 << 3);
}
else
{
SYNTH_EMAC2(hi0, fe, fx, D0ptr);
pcm[0] = -(hi0 << 3); /* shift result to libmad's fixed point format */
pcm += 16;
for (sb = 15; sb; sb--, fo++) {
++fe;
++D0ptr;
++D1ptr;
/* D[32 - sb][i] == -D[sb][31 - i] */
SYNTH_EMAC_EVEN_SBSAMPLE(fo, fe, D0ptr, D1ptr, hi0, hi1);
pcm[-sb] = hi0 << 3;
pcm[ sb] = hi1 << 3;
}
++D0ptr;
SYNTH_EMAC1(hi0, fo, D0ptr);
pcm[0] = -(hi0 << 3);
}
pcm += 16;
phase = (phase + 1) % 16;
}
}
}
#elif defined(FPM_ARM)
#define PROD_O(hi, lo, f, ptr) \
({ \
mad_fixed_t *__p = (f); \
asm("ldmia %2!, {r0, r1, r2, r3}\n\t" \
"ldr r4, [%3, #0]\n\t" \
"ldr r12, [%3, #56]\n\t" \
"smull %0, %1, r0, r4\n\t" \
"ldr r4, [%3, #48]\n\t" \
"smlal %0, %1, r1, r12\n\t" \
"ldr r12, [%3, #40]\n\t" \
"smlal %0, %1, r2, r4\n\t" \
"smlal %0, %1, r3, r12\n\t" \
"ldmia %2, {r0, r1, r2, r3}\n\t" \
"ldr r4, [%3, #32]\n\t" \
"ldr r12, [%3, #24]\n\t" \
"smlal %0, %1, r0, r4\n\t" \
"ldr r4, [%3, #16]\n\t" \
"smlal %0, %1, r1, r12\n\t" \
"ldr r12, [%3, #8]\n\t" \
"smlal %0, %1, r2, r4\n\t" \
"smlal %0, %1, r3, r12\n\t" \
: "=&r" (lo), "=&r" (hi), "+r" (__p) \
: "r" (ptr) \
: "r0", "r1", "r2", "r3", "r4", "r12"); \
})
#define PROD_A(hi, lo, f, ptr) \
({ \
mad_fixed_t *__p = (f); \
asm("ldmia %2!, {r0, r1, r2, r3}\n\t" \
"ldr r4, [%3, #0]\n\t" \
"ldr r12, [%3, #56]\n\t" \
"smlal %0, %1, r0, r4\n\t" \
"ldr r4, [%3, #48]\n\t" \
"smlal %0, %1, r1, r12\n\t" \
"ldr r12, [%3, #40]\n\t" \
"smlal %0, %1, r2, r4\n\t" \
"smlal %0, %1, r3, r12\n\t" \
"ldmia %2, {r0, r1, r2, r3}\n\t" \
"ldr r4, [%3, #32]\n\t" \
"ldr r12, [%3, #24]\n\t" \
"smlal %0, %1, r0, r4\n\t" \
"ldr r4, [%3, #16]\n\t" \
"smlal %0, %1, r1, r12\n\t" \
"ldr r12, [%3, #8]\n\t" \
"smlal %0, %1, r2, r4\n\t" \
"smlal %0, %1, r3, r12\n\t" \
: "+r" (lo), "+r" (hi), "+r" (__p) \
: "r" (ptr) \
: "r0", "r1", "r2", "r3", "r4", "r12"); \
})
void synth_full_odd_sbsample (mad_fixed_t *pcm,
mad_fixed_t (*fo)[8],
mad_fixed_t (*fe)[8],
mad_fixed_t const (*D0ptr)[32],
mad_fixed_t const (*D1ptr)[32]);
void synth_full_even_sbsample(mad_fixed_t *pcm,
mad_fixed_t (*fo)[8],
mad_fixed_t (*fe)[8],
mad_fixed_t const (*D0ptr)[32],
mad_fixed_t const (*D1ptr)[32]);
static
void synth_full(struct mad_synth *synth, struct mad_frame const *frame,
unsigned int nch, unsigned int ns) ICODE_ATTR_MPA_SYNTH;
static
void synth_full(struct mad_synth *synth, struct mad_frame const *frame,
unsigned int nch, unsigned int ns)
{
int p;
unsigned int phase, ch, s;
mad_fixed_t *pcm, (*filter)[2][2][16][8];
mad_fixed_t (*sbsample)[36][32];
mad_fixed_t (*fe)[8], (*fx)[8], (*fo)[8];
mad_fixed_t const (*D0ptr)[32], *ptr;
mad_fixed_t const (*D1ptr)[32];
mad_fixed64hi_t hi;
mad_fixed64lo_t lo;
for (ch = 0; ch < nch; ++ch) {
sbsample = &(*frame->sbsample_prev)[ch];
filter = &synth->filter[ch];
phase = synth->phase;
pcm = synth->pcm.samples[ch];
for (s = 0; s < ns; ++s) {
dct32((*sbsample)[s], phase >> 1,
(*filter)[0][phase & 1], (*filter)[1][phase & 1]);
p = (phase - 1) & 0xf;
/* calculate 32 samples */
fe = &(*filter)[0][ phase & 1][0];
fx = &(*filter)[0][~phase & 1][0];
fo = &(*filter)[1][~phase & 1][0];
D0ptr = (void*)&D[0][ p];
D1ptr = (void*)&D[0][-p];
if(s & 1)
{
ptr = *D0ptr;
PROD_O(hi, lo, *fx, ptr+1);
MLN(hi, lo);
PROD_A(hi, lo, *fe, ptr);
pcm[0] = SHIFT(MLZ(hi, lo));
pcm += 16;
synth_full_odd_sbsample(pcm, fo, fe, D0ptr, D1ptr);
D0ptr += 15;
D1ptr += 15;
fo += 15;
fe += 15;
ptr = *(D0ptr + 1);
PROD_O(hi, lo, *fo, ptr+1);
pcm[0] = SHIFT(-MLZ(hi, lo));
}
else
{
ptr = *D0ptr;
PROD_O(hi, lo, *fx, ptr);
MLN(hi, lo);
PROD_A(hi, lo, *fe, ptr+1);
pcm[0] = SHIFT(MLZ(hi, lo));
pcm += 16;
synth_full_even_sbsample(pcm, fo, fe, D0ptr, D1ptr);
D0ptr += 15;
D1ptr += 15;
fo += 15;
fe += 15;
ptr = *(D0ptr + 1);
PROD_O(hi, lo, *fo, ptr);
pcm[0] = SHIFT(-MLZ(hi, lo));
}
pcm += 16;
phase = (phase + 1) % 16;
}
}
}
# else /* not FPM_COLDFIRE_EMAC and not FPM_ARM */
#define PROD_O(hi, lo, f, ptr, offset) \
ML0(hi, lo, (*f)[0], ptr[ 0+offset]); \
MLA(hi, lo, (*f)[1], ptr[14+offset]); \
MLA(hi, lo, (*f)[2], ptr[12+offset]); \
MLA(hi, lo, (*f)[3], ptr[10+offset]); \
MLA(hi, lo, (*f)[4], ptr[ 8+offset]); \
MLA(hi, lo, (*f)[5], ptr[ 6+offset]); \
MLA(hi, lo, (*f)[6], ptr[ 4+offset]); \
MLA(hi, lo, (*f)[7], ptr[ 2+offset]);
#define PROD_A(hi, lo, f, ptr, offset) \
MLA(hi, lo, (*f)[0], ptr[ 0+offset]); \
MLA(hi, lo, (*f)[1], ptr[14+offset]); \
MLA(hi, lo, (*f)[2], ptr[12+offset]); \
MLA(hi, lo, (*f)[3], ptr[10+offset]); \
MLA(hi, lo, (*f)[4], ptr[ 8+offset]); \
MLA(hi, lo, (*f)[5], ptr[ 6+offset]); \
MLA(hi, lo, (*f)[6], ptr[ 4+offset]); \
MLA(hi, lo, (*f)[7], ptr[ 2+offset]);
#define PROD_SB(hi, lo, ptr, offset, first_idx, last_idx) \
ML0(hi, lo, (*fe)[0], ptr[first_idx]); \
MLA(hi, lo, (*fe)[1], ptr[16+offset]); \
MLA(hi, lo, (*fe)[2], ptr[18+offset]); \
MLA(hi, lo, (*fe)[3], ptr[20+offset]); \
MLA(hi, lo, (*fe)[4], ptr[22+offset]); \
MLA(hi, lo, (*fe)[5], ptr[24+offset]); \
MLA(hi, lo, (*fe)[6], ptr[26+offset]); \
MLA(hi, lo, (*fe)[7], ptr[28+offset]); \
MLA(hi, lo, (*fo)[7], ptr[29-offset]); \
MLA(hi, lo, (*fo)[6], ptr[27-offset]); \
MLA(hi, lo, (*fo)[5], ptr[25-offset]); \
MLA(hi, lo, (*fo)[4], ptr[23-offset]); \
MLA(hi, lo, (*fo)[3], ptr[21-offset]); \
MLA(hi, lo, (*fo)[2], ptr[19-offset]); \
MLA(hi, lo, (*fo)[1], ptr[17-offset]); \
MLA(hi, lo, (*fo)[0], ptr[last_idx ]);
static
void synth_full(struct mad_synth *synth, struct mad_frame const *frame,
unsigned int nch, unsigned int ns)
{
int p, sb;
unsigned int phase, ch, s;
mad_fixed_t *pcm, (*filter)[2][2][16][8];
mad_fixed_t (*sbsample)[36][32];
mad_fixed_t (*fe)[8], (*fx)[8], (*fo)[8];
mad_fixed_t const (*D0ptr)[32], *ptr;
mad_fixed_t const (*D1ptr)[32];
mad_fixed64hi_t hi;
mad_fixed64lo_t lo;
for (ch = 0; ch < nch; ++ch) {
sbsample = &(*frame->sbsample_prev)[ch];
filter = &synth->filter[ch];
phase = synth->phase;
pcm = synth->pcm.samples[ch];
for (s = 0; s < ns; ++s) {
dct32((*sbsample)[s], phase >> 1,
(*filter)[0][phase & 1], (*filter)[1][phase & 1]);
p = (phase - 1) & 0xf;
/* calculate 32 samples */
fe = &(*filter)[0][ phase & 1][0];
fx = &(*filter)[0][~phase & 1][0];
fo = &(*filter)[1][~phase & 1][0];
D0ptr = (void*)&D[0][ p];
D1ptr = (void*)&D[0][-p];
if(s & 1)
{
ptr = *D0ptr;
PROD_O(hi, lo, fx, ptr, 1)
MLN(hi, lo);
PROD_A(hi, lo, fe, ptr, 0)
pcm[0] = SHIFT(MLZ(hi, lo));
pcm += 16;
for (sb = 15; sb; sb--, fo++)
{
++fe;
++D0ptr;
++D1ptr;
/* D[32 - sb][i] == -D[sb][31 - i] */
ptr = *D0ptr;
PROD_O(hi, lo, fo, ptr, 1)
MLN(hi, lo);
PROD_A(hi, lo, fe, ptr, 0)
pcm[-sb] = SHIFT(MLZ(hi, lo));
ptr = *D1ptr;
PROD_SB(hi, lo, ptr, 1, 15, 30)
pcm[sb] = SHIFT(MLZ(hi, lo));
}
ptr = *(D0ptr + 1);
PROD_O(hi, lo, fo, ptr, 1)
pcm[0] = SHIFT(-MLZ(hi, lo));
}
else
{
ptr = *D0ptr;
PROD_O(hi, lo, fx, ptr, 0)
MLN(hi, lo);
PROD_A(hi, lo, fe, ptr, 1)
pcm[0] = SHIFT(MLZ(hi, lo));
pcm += 16;
for (sb = 15; sb; sb--, fo++)
{
++fe;
++D0ptr;
++D1ptr;
/* D[32 - sb][i] == -D[sb][31 - i] */
ptr = *D0ptr;
PROD_O(hi, lo, fo, ptr, 0)
MLN(hi, lo);
PROD_A(hi, lo, fe, ptr, 1)
pcm[-sb] = SHIFT(MLZ(hi, lo));
ptr = *D1ptr;
PROD_SB(hi, lo, ptr, 0, 30, 15)
pcm[sb] = SHIFT(MLZ(hi, lo));
}
ptr = *(D0ptr + 1);
PROD_O(hi, lo, fo, ptr, 0)
pcm[0] = SHIFT(-MLZ(hi, lo));
}
pcm += 16;
phase = (phase + 1) % 16;
}
}
}
# endif /* FPM_COLDFIRE_EMAC, FPM_ARM */
#if 0 /* rockbox: unused */
/*
* NAME: synth->half()
* DESCRIPTION: perform half frequency PCM synthesis
*/
static
void synth_half(struct mad_synth *synth, struct mad_frame const *frame,
unsigned int nch, unsigned int ns)
{
unsigned int phase, ch, s, sb, pe, po;
mad_fixed_t *pcm1, *pcm2, (*filter)[2][2][16][8];
mad_fixed_t (*sbsample)[36][32];
register mad_fixed_t (*fe)[8], (*fx)[8], (*fo)[8];
register mad_fixed_t const (*Dptr)[32], *ptr;
register mad_fixed64hi_t hi;
register mad_fixed64lo_t lo;
for (ch = 0; ch < nch; ++ch) {
sbsample = &(*frame->sbsample_prev)[ch];
filter = &synth->filter[ch];
phase = synth->phase;
pcm1 = synth->pcm.samples[ch];
for (s = 0; s < ns; ++s) {
dct32((*sbsample)[s], phase >> 1,
(*filter)[0][phase & 1], (*filter)[1][phase & 1]);
pe = phase & ~1;
po = ((phase - 1) & 0xf) | 1;
/* calculate 16 samples */
fe = &(*filter)[0][ phase & 1][0];
fx = &(*filter)[0][~phase & 1][0];
fo = &(*filter)[1][~phase & 1][0];
Dptr = &D[0];
ptr = *Dptr + po;
ML0(hi, lo, (*fx)[0], ptr[ 0]);
MLA(hi, lo, (*fx)[1], ptr[14]);
MLA(hi, lo, (*fx)[2], ptr[12]);
MLA(hi, lo, (*fx)[3], ptr[10]);
MLA(hi, lo, (*fx)[4], ptr[ 8]);
MLA(hi, lo, (*fx)[5], ptr[ 6]);
MLA(hi, lo, (*fx)[6], ptr[ 4]);
MLA(hi, lo, (*fx)[7], ptr[ 2]);
MLN(hi, lo);
ptr = *Dptr + pe;
MLA(hi, lo, (*fe)[0], ptr[ 0]);
MLA(hi, lo, (*fe)[1], ptr[14]);
MLA(hi, lo, (*fe)[2], ptr[12]);
MLA(hi, lo, (*fe)[3], ptr[10]);
MLA(hi, lo, (*fe)[4], ptr[ 8]);
MLA(hi, lo, (*fe)[5], ptr[ 6]);
MLA(hi, lo, (*fe)[6], ptr[ 4]);
MLA(hi, lo, (*fe)[7], ptr[ 2]);
*pcm1++ = SHIFT(MLZ(hi, lo));
pcm2 = pcm1 + 14;
for (sb = 1; sb < 16; ++sb) {
++fe;
++Dptr;
/* D[32 - sb][i] == -D[sb][31 - i] */
if (!(sb & 1)) {
ptr = *Dptr + po;
ML0(hi, lo, (*fo)[0], ptr[ 0]);
MLA(hi, lo, (*fo)[1], ptr[14]);
MLA(hi, lo, (*fo)[2], ptr[12]);
MLA(hi, lo, (*fo)[3], ptr[10]);
MLA(hi, lo, (*fo)[4], ptr[ 8]);
MLA(hi, lo, (*fo)[5], ptr[ 6]);
MLA(hi, lo, (*fo)[6], ptr[ 4]);
MLA(hi, lo, (*fo)[7], ptr[ 2]);
MLN(hi, lo);
ptr = *Dptr + pe;
MLA(hi, lo, (*fe)[7], ptr[ 2]);
MLA(hi, lo, (*fe)[6], ptr[ 4]);
MLA(hi, lo, (*fe)[5], ptr[ 6]);
MLA(hi, lo, (*fe)[4], ptr[ 8]);
MLA(hi, lo, (*fe)[3], ptr[10]);
MLA(hi, lo, (*fe)[2], ptr[12]);
MLA(hi, lo, (*fe)[1], ptr[14]);
MLA(hi, lo, (*fe)[0], ptr[ 0]);
*pcm1++ = SHIFT(MLZ(hi, lo));
ptr = *Dptr - po;
ML0(hi, lo, (*fo)[7], ptr[31 - 2]);
MLA(hi, lo, (*fo)[6], ptr[31 - 4]);
MLA(hi, lo, (*fo)[5], ptr[31 - 6]);
MLA(hi, lo, (*fo)[4], ptr[31 - 8]);
MLA(hi, lo, (*fo)[3], ptr[31 - 10]);
MLA(hi, lo, (*fo)[2], ptr[31 - 12]);
MLA(hi, lo, (*fo)[1], ptr[31 - 14]);
MLA(hi, lo, (*fo)[0], ptr[31 - 16]);
ptr = *Dptr - pe;
MLA(hi, lo, (*fe)[0], ptr[31 - 16]);
MLA(hi, lo, (*fe)[1], ptr[31 - 14]);
MLA(hi, lo, (*fe)[2], ptr[31 - 12]);
MLA(hi, lo, (*fe)[3], ptr[31 - 10]);
MLA(hi, lo, (*fe)[4], ptr[31 - 8]);
MLA(hi, lo, (*fe)[5], ptr[31 - 6]);
MLA(hi, lo, (*fe)[6], ptr[31 - 4]);
MLA(hi, lo, (*fe)[7], ptr[31 - 2]);
*pcm2-- = SHIFT(MLZ(hi, lo));
}
++fo;
}
++Dptr;
ptr = *Dptr + po;
ML0(hi, lo, (*fo)[0], ptr[ 0]);
MLA(hi, lo, (*fo)[1], ptr[14]);
MLA(hi, lo, (*fo)[2], ptr[12]);
MLA(hi, lo, (*fo)[3], ptr[10]);
MLA(hi, lo, (*fo)[4], ptr[ 8]);
MLA(hi, lo, (*fo)[5], ptr[ 6]);
MLA(hi, lo, (*fo)[6], ptr[ 4]);
MLA(hi, lo, (*fo)[7], ptr[ 2]);
*pcm1 = SHIFT(-MLZ(hi, lo));
pcm1 += 8;
phase = (phase + 1) % 16;
}
}
}
#endif /* unused */
/*
* NAME: synth->frame()
* DESCRIPTION: perform PCM synthesis of frame subband samples
*/
void mad_synth_frame(struct mad_synth *synth, struct mad_frame const *frame)
{
unsigned int nch, ns;
#if 0 /* rockbox: unused */
void (*synth_frame)(struct mad_synth *, struct mad_frame const *,
unsigned int, unsigned int);
#endif
nch = MAD_NCHANNELS(&frame->header);
ns = MAD_NSBSAMPLES(&frame->header);
synth->pcm.samplerate = frame->header.samplerate;
synth->pcm.channels = nch;
synth->pcm.length = 32 * ns;
#if 0 /* rockbox: unused */
synth_frame = synth_full;
if (frame->options & MAD_OPTION_HALFSAMPLERATE) {
synth->pcm.samplerate /= 2;
synth->pcm.length /= 2;
synth_frame = synth_half;
}
synth_frame(synth, frame, nch, ns);
#else
synth_full(synth, frame, nch, ns);
#endif
synth->phase = (synth->phase + ns) % 16;
}
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