diff options
Diffstat (limited to 'src/pcm_utils.h')
| -rw-r--r-- | src/pcm_utils.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/pcm_utils.h b/src/pcm_utils.h index 71398c015..44ea5aa16 100644 --- a/src/pcm_utils.h +++ b/src/pcm_utils.h @@ -22,6 +22,8 @@ #include "pcm_resample.h" #include "pcm_dither.h" +#include <glib.h> + #include <stdint.h> #include <stddef.h> @@ -42,6 +44,20 @@ struct pcm_convert_state { }; /** + * Check if the value is within the range of the provided bit size, + * and caps it if necessary. + */ +static inline int32_t +pcm_range(int32_t sample, unsigned bits) +{ + if (G_UNLIKELY(sample < (-1 << (bits - 1)))) + return -1 << (bits - 1); + if (G_UNLIKELY(sample >= (1 << (bits - 1)))) + return (1 << (bits - 1)) - 1; + return sample; +} + +/** * Converts a float value (0.0 = silence, 1.0 = 100% volume) to an * integer volume value (1000 = 100%). */ |