/* * util.h - utility functions */ #include "streamtypes.h" #ifndef _UTIL_H #define _UTIL_H /* host endian independent multi-byte integer reading */ static inline int16_t get_16bitBE(uint8_t * p) { return (p[0]<<8) | (p[1]); } static inline int16_t get_16bitLE(uint8_t * p) { return (p[0]) | (p[1]<<8); } static inline int32_t get_32bitBE(uint8_t * p) { return (p[0]<<24) | (p[1]<<16) | (p[2]<<8) | (p[3]); } static inline int32_t get_32bitLE(uint8_t * p) { return (p[0]) | (p[1]<<8) | (p[2]<<16) | (p[3]<<24); } void put_8bit(uint8_t * buf, int8_t i); void put_16bitLE(uint8_t * buf, int16_t i); void put_32bitLE(uint8_t * buf, int32_t i); void put_16bitBE(uint8_t * buf, int16_t i); void put_32bitBE(uint8_t * buf, int32_t i); /* signed nibbles come up a lot */ static int nibble_to_int[16] = {0,1,2,3,4,5,6,7,-8,-7,-6,-5,-4,-3,-2,-1}; static inline int get_high_nibble_signed(uint8_t n) { /*return ((n&0x70)-(n&0x80))>>4;*/ return nibble_to_int[n>>4]; } static inline int get_low_nibble_signed(uint8_t n) { /*return (n&7)-(n&8);*/ return nibble_to_int[n&0xf]; } /* return true for a good sample rate */ int check_sample_rate(int32_t sr); /* return a file's extension (a pointer to the first character of the * extension in the original filename or the ending null byte if no extension */ const char * filename_extension(const char * filename); static inline int clamp16(int32_t val) { if (val>32767) return 32767; if (val<-32768) return -32768; return val; } void swap_samples_le(sample *buf, int count); void concatn(int length, char * dst, const char * src); /* Simple stdout logging for debugging and regression testing purposes. * Needs C99 variadic macros. */ #ifdef VGM_DEBUG_OUTPUT /* equivalent to printf when condition is true */ #define VGM_ASSERT(condition, ...) \ do { if (condition) printf(__VA_ARGS__); } while (0) /* equivalent to printf */ #define VGM_LOG(...) \ do { printf(__VA_ARGS__); } while (0) /* prints file/line/func */ #define VGM_LOGF() \ do { printf("%s:%i '%s'\n", __FILE__, __LINE__, __func__); } while (0) /* prints a buffer/array */ #define VGM_LOGB(buf, buf_size, bytes_per_line) \ do { \ int i; \ for (i=0; i < buf_size; i++) { \ printf("%02x",buf[i]); \ if (bytes_per_line && (i+1) % bytes_per_line == 0) printf("\n"); \ } \ printf("\n"); \ } while (0) #else #define VGM_ASSERT(condition, ...) /* nothing */ #define VGM_LOG(...) /* nothing */ #define VGM_LOGF() /* nothing */ #define VGM_LOGB(buf, buf_size, bytes_per_line) /* nothing */ #endif #endif