apps/codecs/demac/libdemac/demac_config.h

   1 /*
   2
   3 libdemac - A Monkey's Audio decoder
   4
   5 $Id$
   6
   7 Copyright (C) Dave Chapman 2007
   8
   9 This program is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2 of the License, or
  12 (at your option) any later version.
  13
  14 This program is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with this program; if not, write to the Free Software
  21 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA
  22
  23 */
  24
  25 #ifndef _DEMAC_CONFIG_H
  26 #define _DEMAC_CONFIG_H
  27
  28 /* Build-time choices for libdemac.
  29  * Note that this file is included by both .c and .S files. */
  30
  31 #ifdef ROCKBOX
  32
  33 #include "config.h"
  34
  35 #ifndef __ASSEMBLER__
  36 #include "codeclib.h"
  37 #include <codecs.h>
  38 #endif
  39
  40 #define APE_OUTPUT_DEPTH 29
  41
  42 /* On ARMv4, using 32 bit ints for the filters is faster. */
  43 #if defined(CPU_ARM) && (ARM_ARCH == 4)
  44 #define FILTER_BITS 32
  45 #endif
  46
  47 #if !defined(CPU_PP) && !defined(CPU_S5L870X)
  48 #define FILTER256_IRAM
  49 #endif
  50
  51 #if CONFIG_CPU == PP5002 || defined(CPU_S5L870X)
  52 /* Code and data IRAM for speed (PP5002 has a broken cache), not enough IRAM
  53  * for the insane filter buffer. Reciprocal table for division in IRAM. */
  54 #define ICODE_SECTION_DEMAC_ARM   .icode
  55 #define ICODE_ATTR_DEMAC          ICODE_ATTR
  56 #define ICONST_ATTR_DEMAC         ICONST_ATTR
  57 #define IBSS_ATTR_DEMAC           IBSS_ATTR
  58 #define IBSS_ATTR_DEMAC_INSANEBUF
  59
  60 #elif CONFIG_CPU == PP5020
  61 /* Code and small data in DRAM for speed (PP5020 IRAM isn't completely single
  62  * cycle). Insane filter buffer not in IRAM in favour of reciprocal table for
  63  * divison. Decoded data buffers should be in IRAM (defined by the caller). */
  64 #define ICODE_SECTION_DEMAC_ARM   .text
  65 #define ICODE_ATTR_DEMAC
  66 #define ICONST_ATTR_DEMAC
  67 #define IBSS_ATTR_DEMAC
  68 #define IBSS_ATTR_DEMAC_INSANEBUF
  69
  70 #elif CONFIG_CPU == PP5022
  71 /* Code in DRAM, data in IRAM. Insane filter buffer not in IRAM in favour of
  72  * reciprocal table for divison */
  73 #define ICODE_SECTION_DEMAC_ARM   .text
  74 #define ICODE_ATTR_DEMAC
  75 #define ICONST_ATTR_DEMAC         ICONST_ATTR
  76 #define IBSS_ATTR_DEMAC           IBSS_ATTR
  77 #define IBSS_ATTR_DEMAC_INSANEBUF
  78
  79 #else
  80 /* Code in DRAM, data in IRAM, including insane filter buffer. */
  81 #define ICODE_SECTION_DEMAC_ARM   .text
  82 #define ICODE_ATTR_DEMAC
  83 #define ICONST_ATTR_DEMAC         ICONST_ATTR
  84 #define IBSS_ATTR_DEMAC           IBSS_ATTR
  85 #define IBSS_ATTR_DEMAC_INSANEBUF IBSS_ATTR
  86 #endif
  87
  88 #else /* !ROCKBOX */
  89
  90 #define APE_OUTPUT_DEPTH (ape_ctx->bps)
  91
  92 #define ICODE_ATTR_DEMAC
  93 #define ICONST_ATTR_DEMAC
  94 #define IBSS_ATTR_DEMAC
  95 #define IBSS_ATTR_DEMAC_INSANEBUF
  96
  97 /* Use to give gcc hints on which branch is most likely taken */
  98 #if defined(__GNUC__) && __GNUC__ >= 3
  99 #define LIKELY(x)   __builtin_expect(!!(x), 1)
 100 #define UNLIKELY(x) __builtin_expect(!!(x), 0)
 101 #else
 102 #define LIKELY(x)   (x)
 103 #define UNLIKELY(x) (x)
 104 #endif
 105
 106 #endif /* !ROCKBOX */
 107
 108 /* Defaults */
 109
 110 #ifndef FILTER_HISTORY_SIZE
 111 #define FILTER_HISTORY_SIZE 512
 112 #endif
 113
 114 #ifndef PREDICTOR_HISTORY_SIZE
 115 #define PREDICTOR_HISTORY_SIZE 512
 116 #endif
 117
 118 #ifndef FILTER_BITS
 119 #define FILTER_BITS 16
 120 #endif
 121
 122
 123 #ifndef __ASSEMBLER__
 124
 125 #if defined(CPU_ARM) && (ARM_ARCH < 5 || defined(USE_IRAM))
 126 /* optimised unsigned integer division for ARMv4, in IRAM */
 127 unsigned udiv32_arm(unsigned a, unsigned b);
 128 #define UDIV32(a, b) udiv32_arm(a, b)
 129 #else
 130 /* default */
 131 #define UDIV32(a, b) (a / b)
 132 #endif
 133
 134 #include <inttypes.h>
 135 #if FILTER_BITS == 32
 136 typedef int32_t filter_int;
 137 #elif FILTER_BITS == 16
 138 typedef int16_t filter_int;
 139 #endif
 140 #endif
 141
 142 #endif /* _DEMAC_CONFIG_H */