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Midi Kit: SoftSynth: Implement reverb (patch by Pete Goodeve)

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Applied patch by Pete Goodeve which implements reverb in the soft synthesizer.
This commit is contained in:
Stefano Ceccherini 2014-09-20 19:19:12 +02:00
parent 6cd948da2a
commit bd68cd0517
1 changed files with 23 additions and 2 deletions
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25
src/kits/midi/SoftSynth.cpp
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@ -1,5 +1,5 @@
/*
* Copyright 2006, Haiku.
* Copyright 2006-2014, Haiku.
*
* Copyright (c) 2004-2005 Matthijs Hollemans
* Copyright (c) 2003 Jerome Leveque
@ -9,6 +9,7 @@
* Jérôme Duval
* Jérôme Leveque
* Matthijs Hollemans
* Pete Goodeve
*/
#include <MidiRoster.h>
@ -26,6 +27,18 @@ using namespace BPrivate;
const static char* kSynthFileName = "synth.sf2";
struct ReverbSettings {
double room, damp, width, level;
} gReverbSettings[] = {
{0.0, 0.0, 0.0, 0.0}, // B_REVERB_NONE
{0.2, 0.0, 0.5, 0.9}, // B_REVERB_CLOSET
{0.5, 0.0, 0.9, 0.9}, // B_REVERB_GARAGE
{0.7, 0.25, 0.9, 0.95}, // B_REVERB_BALLROOM
{0.99, 0.3, 1.0, 1.0}, // B_REVERB_CAVERN
{1.03, 0.6, 1.0, 1.0} // B_REVERB_DUNGEON
};
BSoftSynth::BSoftSynth()
: fInitCheck(false),
fSynth(NULL),
@ -232,9 +245,15 @@ BSoftSynth::IsReverbEnabled() const
void
BSoftSynth::SetReverb(reverb_mode mode)
{
// TODO: this function could change depending on the synth back-end.
if (mode < B_REVERB_NONE || mode > B_REVERB_DUNGEON)
return;
fReverbMode = mode;
if (fSynth) {
// We access the table using "mode - 1" because B_REVERB_NONE == 1
ReverbSettings *rvb = &gReverbSettings[mode - 1];
fluid_synth_set_reverb(fSynth, rvb->room, rvb->damp, rvb->width, rvb->level);
}
}
@ -458,6 +477,8 @@ BSoftSynth::_Init()
return;
}
SetReverb(fReverbMode);
media_raw_audio_format format = media_raw_audio_format::wildcard;
format.channel_count = 2;
format.frame_rate = fSampleRate;