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| author | Max Kellermann <max@duempel.org> | 2013-12-22 17:37:36 +0100 |
|---|---|---|
| committer | Max Kellermann <max@duempel.org> | 2013-12-22 21:31:17 +0100 |
| commit | 316a25dead0698be5e5befb236e08146740aca77 (patch) | |
| tree | 84e2857b781ca27658cb41e77301233bfef21655 | |
| parent | bfe020e06c2ba0671cdd1dacd9999c986c3168d6 (diff) | |
| download | mpd-316a25dead0698be5e5befb236e08146740aca77.tar.gz mpd-316a25dead0698be5e5befb236e08146740aca77.tar.xz mpd-316a25dead0698be5e5befb236e08146740aca77.zip | |
pcm/Volume: add constant PCM_VOLUME_BITS
| -rw-r--r-- | src/pcm/PcmVolume.cxx | 2 | ||||
| -rw-r--r-- | src/pcm/PcmVolume.hxx | 5 |
2 files changed, 6 insertions, 1 deletions
diff --git a/src/pcm/PcmVolume.cxx b/src/pcm/PcmVolume.cxx index d2a3c51f3..5c0a1fbd3 100644 --- a/src/pcm/PcmVolume.cxx +++ b/src/pcm/PcmVolume.cxx @@ -37,7 +37,7 @@ pcm_volume_change(typename Traits::pointer_type buffer, sample = (sample * volume + pcm_volume_dither() + PCM_VOLUME_1S / 2) - / PCM_VOLUME_1S; + >> PCM_VOLUME_BITS; *buffer++ = PcmClamp<F, Traits>(sample); } diff --git a/src/pcm/PcmVolume.hxx b/src/pcm/PcmVolume.hxx index 502fca9ec..52102a294 100644 --- a/src/pcm/PcmVolume.hxx +++ b/src/pcm/PcmVolume.hxx @@ -27,6 +27,11 @@ #include <stddef.h> /** + * Number of fractional bits for a fixed-point volume value. + */ +static constexpr unsigned PCM_VOLUME_BITS = 10; + +/** * This value means "100% volume". */ static constexpr unsigned PCM_VOLUME_1 = 1024; |