apps/codecs/lib/codeclib.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2005 Dave Chapman
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #ifndef __CODECLIB_H__
  23 #define __CODECLIB_H__
  24
  25 #include "config.h"
  26 #include "codecs.h"
  27 #include <sys/types.h>
  28
  29 extern struct codec_api *ci;
  30 extern size_t mem_ptr;
  31 extern size_t bufsize;
  32 extern unsigned char* mp3buf;     /* The actual MP3 buffer from Rockbox                 */
  33 extern unsigned char* mallocbuf;  /* The free space after the codec in the codec buffer */
  34 extern unsigned char* filebuf;    /* The rest of the MP3 buffer                         */
  35
  36 /* Standard library functions that are used by the codecs follow here */
  37
  38 /* Get these functions 'out of the way' of the standard functions. Not doing
  39  * so confuses the cygwin linker, and maybe others. These functions need to
  40  * be implemented elsewhere */
  41 #define malloc(x) codec_malloc(x)
  42 #define calloc(x,y) codec_calloc(x,y)
  43 #define realloc(x,y) codec_realloc(x,y)
  44 #define free(x) codec_free(x)
  45 #define alloca(x) __builtin_alloca(x)
  46
  47 void* codec_malloc(size_t size);
  48 void* codec_calloc(size_t nmemb, size_t size);
  49 void* codec_realloc(void* ptr, size_t size);
  50 void codec_free(void* ptr);
  51
  52 void *memcpy(void *dest, const void *src, size_t n);
  53 void *memset(void *s, int c, size_t n);
  54 int memcmp(const void *s1, const void *s2, size_t n);
  55 void *memmove(void *s1, const void *s2, size_t n);
  56
  57 size_t strlen(const char *s);
  58 char *strcpy(char *dest, const char *src);
  59 char *strcat(char *dest, const char *src);
  60 int strcmp(const char *, const char *);
  61
  62 void qsort(void *base, size_t nmemb, size_t size, int(*compar)(const void *, const void *));
  63
  64 /*MDCT library functions*/
  65
  66 extern void mdct_backward(int n, int32_t *in, int32_t *out);
  67
  68 #if defined(CPU_ARM) && (ARM_ARCH == 4)
  69 /* optimised unsigned integer division for ARMv4, in IRAM */
  70 unsigned udiv32_arm(unsigned a, unsigned b);
  71 #define UDIV32(a, b) udiv32_arm(a, b)
  72 #else
  73 /* default */
  74 #define UDIV32(a, b) (a / b)
  75 #endif
  76
  77 /* TODO figure out if we really need to care about calculating
  78    av_log2(0) */
  79 #if (defined(CPU_ARM) && (ARM_ARCH > 4))
  80 static inline unsigned int av_log2(uint32_t v)
  81 {
  82     unsigned int lz = __builtin_clz(v);
  83     return 31 - lz + (lz >> 5); /* make sure av_log2(0) returns 0 */
  84 }
  85 #else
  86 /* From libavutil/common.h */
  87 extern const uint8_t ff_log2_tab[256] ICONST_ATTR;
  88
  89 static inline unsigned int av_log2(unsigned int v)
  90 {
  91     int n;
  92
  93     n = 0;
  94     if (v & 0xffff0000) {
  95         v >>= 16;
  96         n += 16;
  97     }
  98     if (v & 0xff00) {
  99         v >>= 8;
 100         n += 8;
 101     }
 102     n += ff_log2_tab[v];
 103
 104     return n;
 105 }
 106 #endif
 107
 108 /* Various codec helper functions */
 109
 110 int codec_init(void);
 111 void codec_set_replaygain(struct mp3entry* id3);
 112
 113 #ifdef RB_PROFILE
 114 void __cyg_profile_func_enter(void *this_fn, void *call_site)
 115     NO_PROF_ATTR ICODE_ATTR;
 116 void __cyg_profile_func_exit(void *this_fn, void *call_site)
 117     NO_PROF_ATTR ICODE_ATTR;
 118 #endif
 119
 120 #endif /* __CODECLIB_H__ */