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pcm/SoxrResampler: round output buffer size up 

The old formula calculates the output buffer size with "regular"
rounding (to the nearest integer), however sometimes, that is
insufficient and the last sample cannot be resampled.  This causes
audible distortions.  By changing the formula to consider the worst
case (always round up), this problem is eliminated.
This commit is contained in:
Max Kellermann 2014-11-10 22:52:17 +01:00
parent 8ff0d99092
commit 8d036c4b7c
2 changed files with 3 additions and 1 deletions
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1
NEWS
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@ -9,6 +9,7 @@ ver 0.19.3 (not yet released)
- audiofile: fix crash while playing streams
- audiofile: fix bit rate calculation
- ffmpeg: support opus
* fix distorted audio with soxr resampler
ver 0.19.2 (2014/11/02)
* input

3
src/pcm/SoxrResampler.cxx
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@ -147,7 +147,8 @@ SoxrPcmResampler::Resample(ConstBuffer<void> src, Error &error)
const size_t n_frames = src.size / frame_size;
const size_t o_frames = size_t(n_frames * ratio + 0.5);
/* always round up: worst case output buffer size */
const size_t o_frames = size_t(n_frames * ratio) + 1;
float *output_buffer = (float *)buffer.Get(o_frames * frame_size);