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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 Dave Chapman
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef __CODECLIB_H__
#define __CODECLIB_H__
#include "config.h"
#include "codecs.h"
#include <sys/types.h>
extern struct codec_api *ci;
extern size_t mem_ptr;
extern size_t bufsize;
extern unsigned char* mp3buf; /* The actual MP3 buffer from Rockbox */
extern unsigned char* mallocbuf; /* The free space after the codec in the codec buffer */
extern unsigned char* filebuf; /* The rest of the MP3 buffer */
/* Standard library functions that are used by the codecs follow here */
/* Get these functions 'out of the way' of the standard functions. Not doing
* so confuses the cygwin linker, and maybe others. These functions need to
* be implemented elsewhere */
#define malloc(x) codec_malloc(x)
#define calloc(x,y) codec_calloc(x,y)
#define realloc(x,y) codec_realloc(x,y)
#define free(x) codec_free(x)
#define alloca(x) __builtin_alloca(x)
void* codec_malloc(size_t size);
void* codec_calloc(size_t nmemb, size_t size);
void* codec_realloc(void* ptr, size_t size);
void codec_free(void* ptr);
void *memcpy(void *dest, const void *src, size_t n);
void *memset(void *s, int c, size_t n);
int memcmp(const void *s1, const void *s2, size_t n);
void *memmove(void *s1, const void *s2, size_t n);
size_t strlen(const char *s);
char *strcpy(char *dest, const char *src);
char *strcat(char *dest, const char *src);
int strcmp(const char *, const char *);
void qsort(void *base, size_t nmemb, size_t size, int(*compar)(const void *, const void *));
/*MDCT library functions*/
extern void mdct_backward(int n, int32_t *in, int32_t *out);
#if defined(CPU_ARM) && (ARM_ARCH == 4)
/* optimised unsigned integer division for ARMv4, in IRAM */
unsigned udiv32_arm(unsigned a, unsigned b);
#define UDIV32(a, b) udiv32_arm(a, b)
#else
/* default */
#define UDIV32(a, b) (a / b)
#endif
/* TODO figure out if we really need to care about calculating
av_log2(0) */
#ifdef CPU_ARM
#if ARM_ARCH > 5
static inline unsigned int av_log2(uint32_t v)
{
unsigned int r;
asm volatile("clz %[r], %[v]\n\t" /* count leading zeroes */
"rsb %[r], %[r], #31\n\t" /* r = 31 - leading zeroes */
"usat %[r], #5, %[r]\n\t" /* unsigned saturate r so -1 -> 0 */
:[r] "=r" (r) : [v] "r" (v));
return(r);
}
#elif ARM_ARCH > 4
static inline unsigned int av_log2(uint32_t v)
{
return v ? 31 - __builtin_clz(v) : 0;
}
#endif
#else /* CPU_ARM */
/* From libavutil/common.h */
extern const uint8_t ff_log2_tab[256] ICONST_ATTR;
static inline unsigned int av_log2(unsigned int v)
{
int n;
n = 0;
if (v & 0xffff0000) {
v >>= 16;
n += 16;
}
if (v & 0xff00) {
v >>= 8;
n += 8;
}
n += ff_log2_tab[v];
return n;
}
#endif
/* Various codec helper functions */
int codec_init(void);
void codec_set_replaygain(struct mp3entry* id3);
#ifdef RB_PROFILE
void __cyg_profile_func_enter(void *this_fn, void *call_site)
NO_PROF_ATTR ICODE_ATTR;
void __cyg_profile_func_exit(void *this_fn, void *call_site)
NO_PROF_ATTR ICODE_ATTR;
#endif
#endif /* __CODECLIB_H__ */
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