mirror of
https://github.com/hrydgard/ppsspp.git
synced 2026-10-15 15:30:29 +02:00
Henrik Rydgård
5402579a44
The reverb presets came from nocash's PS1 table. Six of the nine are identical on the PSP, but three are not. Also correct our linear interpolation expression: we were close but our formula can produce an off by 1 at times.
56 lines
1.7 KiB
C++
56 lines
1.7 KiB
C++
// Copyright (c) 2015- PPSSPP Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#pragma once
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struct SasReverbData;
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class SasReverb {
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public:
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SasReverb();
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~SasReverb();
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void SetPreset(int preset);
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// sceSasRevParam's delay and feedback, both 0..127. Only the Echo and Delay presets use
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// them; the hardware recomputes most of their parameters from these.
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void SetParams(int delay, int feedback);
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int GetPreset() { return preset_; }
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static const char *GetPresetName(int preset);
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// Input should be a mixdown of all the channels that have reverb enabled, at 22khz.
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// Output is written back at 44khz.
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void ProcessReverb(int16_t *output, const int16_t *input, size_t inputSize, int volLeft, int volRight);
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private:
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enum {
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BUFSIZE = 0x20000,
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};
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// Copies the current preset into data_, then patches it for Echo/Delay. Called whenever the
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// preset or the parameters change.
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void ApplyParams();
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int16_t *workspace_;
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// The preset in effect, as a mutable copy: Echo and Delay are partly computed at runtime.
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SasReverbData *data_;
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int preset_;
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int pos_;
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int delay_ = 0;
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int feedback_ = 0;
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};
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