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Fix Godot's cubic resampling algorithm

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(cherry picked from commit 2d450c6f61)
This commit is contained in:
Ellen Poe 2021-07-30 13:20:25 -07:00 committed by Rémi Verschelde
parent f26390769a
commit 994cafb9f1
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GPG Key ID: C3336907360768E1
1 changed files with 4 additions and 4 deletions
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8
servers/audio/audio_stream.cpp
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@ -66,12 +66,12 @@ void AudioStreamPlaybackResampled::mix(AudioFrame *p_buffer, float p_rate_scale,
AudioFrame y3 = internal_buffer[idx - 0]; AudioFrame y3 = internal_buffer[idx - 0];
float mu2 = mu * mu; float mu2 = mu * mu;
AudioFrame a0 = y3 - y2 - y0 + y1; AudioFrame a0 = 3 * y1 - 3 * y2 + y3 - y0;
AudioFrame a1 = y0 - y1 - a0; AudioFrame a1 = 2 * y0 - 5 * y1 + 4 * y2 - y3;
AudioFrame a2 = y2 - y0; AudioFrame a2 = y2 - y0;
AudioFrame a3 = y1; AudioFrame a3 = 2 * y1;
p_buffer[i] = (a0 * mu * mu2 + a1 * mu2 + a2 * mu + a3); p_buffer[i] = (a0 * mu * mu2 + a1 * mu2 + a2 * mu + a3) / 2;
mix_offset += mix_increment; mix_offset += mix_increment;