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volume: Use a macro to check if a volume is valid

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This adds a PA_VOLUME_IS_VALID() macro for checking if a given
pa_volume_t is valid. This makes changes to the volume ranges simpler
(just change PA_VOLUME_MAX, for example, without needing to modify any
other code).
This commit is contained in:
Arun Raghavan 2010-10-09 22:30:20 +05:30
parent 4d84a00b49
commit 1d2ef7923d
9 changed files with 30 additions and 27 deletions
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3
src/pulse/volume.h
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@ -118,6 +118,9 @@ typedef uint32_t pa_volume_t;
/** Special 'invalid' volume. \since 0.9.16 */
#define PA_VOLUME_INVALID ((pa_volume_t) UINT32_MAX)
/** Check if volume is valid. \since 0.9.22 */
#define PA_VOLUME_IS_VALID(v) ((v) <= PA_VOLUME_MAX)
/** A structure encapsulating a per-channel volume */
typedef struct pa_cvolume {
uint8_t channels; /**< Number of channels */