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| author | Max Kellermann <max@duempel.org> | 2008-09-23 23:59:54 +0200 |
|---|---|---|
| committer | Max Kellermann <max@duempel.org> | 2008-09-23 23:59:54 +0200 |
| commit | 128d8c7c15c0713cfccc42dfeea9b0cd9ed11d14 (patch) | |
| tree | 92bb882c28b4f2621e3cccfbf1e1aa740f76a55c /src/audio_format.h | |
| parent | e4f5d6bdf47c96dc9c0b5fe287598bc10b168a71 (diff) | |
| download | mpd-128d8c7c15c0713cfccc42dfeea9b0cd9ed11d14.tar.gz mpd-128d8c7c15c0713cfccc42dfeea9b0cd9ed11d14.tar.xz mpd-128d8c7c15c0713cfccc42dfeea9b0cd9ed11d14.zip | |
audio_format: added audio_format_sample_size()
The inline function audio_format_sample_size() calculates how many
bytes each sample consumes. This function already takes into account
that 24 bit samples are 4 bytes long, not 3.
Diffstat (limited to 'src/audio_format.h')
| -rw-r--r-- | src/audio_format.h | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/src/audio_format.h b/src/audio_format.h index d2461a338..e45d79cd5 100644 --- a/src/audio_format.h +++ b/src/audio_format.h @@ -47,14 +47,27 @@ static inline int audio_format_equals(const struct audio_format *a, a->channels == b->channels; } +/** + * Returns the size of each (mono) sample in bytes. + */ +static inline unsigned audio_format_sample_size(const struct audio_format *af) +{ + if (af->bits <= 8) + return 1; + else if (af->bits <= 16) + return 2; + else + return 4; +} + static inline double audio_format_time_to_size(const struct audio_format *af) { - return af->sampleRate * af->bits * af->channels / 8.0; + return af->sampleRate * af->channels * audio_format_sample_size(af); } static inline double audioFormatSizeToTime(const struct audio_format *af) { - return 8.0 / af->bits / af->channels / af->sampleRate; + return 1.0 / audio_format_time_to_size(af); } #endif |