diff options
Diffstat (limited to 'src/pcm_utils.h')
| -rw-r--r-- | src/pcm_utils.h | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/src/pcm_utils.h b/src/pcm_utils.h index 15f9e1b10..4ad896570 100644 --- a/src/pcm_utils.h +++ b/src/pcm_utils.h @@ -1,5 +1,5 @@ /* - * Copyright (C) 2003-2010 The Music Player Daemon Project + * Copyright (C) 2003-2011 The Music Player Daemon Project * http://www.musicpd.org * * This program is free software; you can redistribute it and/or modify @@ -25,6 +25,17 @@ #include <stdint.h> /** + * Add a byte count to the specified pointer. This is a utility + * function to convert a source pointer and a byte count to an "end" + * pointer for use in loops. + */ +static inline const void * +pcm_end_pointer(const void *p, size_t size) +{ + return (const char *)p + size; +} + +/** * Check if the value is within the range of the provided bit size, * and caps it if necessary. */ @@ -52,4 +63,32 @@ pcm_range_64(int64_t sample, unsigned bits) return sample; } +G_GNUC_CONST +static inline int16_t +pcm_clamp_16(int x) +{ + static const int32_t MIN_VALUE = G_MININT16; + static const int32_t MAX_VALUE = G_MAXINT16; + + if (G_UNLIKELY(x < MIN_VALUE)) + return MIN_VALUE; + if (G_UNLIKELY(x > MAX_VALUE)) + return MAX_VALUE; + return x; +} + +G_GNUC_CONST +static inline int32_t +pcm_clamp_24(int x) +{ + static const int32_t MIN_VALUE = -(1 << 23); + static const int32_t MAX_VALUE = (1 << 23) - 1; + + if (G_UNLIKELY(x < MIN_VALUE)) + return MIN_VALUE; + if (G_UNLIKELY(x > MAX_VALUE)) + return MAX_VALUE; + return x; +} + #endif |