From 24ef40bc07d212c56b11b266d683959932b5068d Mon Sep 17 00:00:00 2001
From: Chris <chris@ternar.tech>
Date: Fri, 20 Jun 2025 15:23:03 +0200
Subject: [PATCH] add constructor parameter controlling reservation of number
 of voices

---
 synth/midi_synth.h      | 6 +++++-
 synth/voice_allocator.h | 7 +++++--
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/synth/midi_synth.h b/synth/midi_synth.h
index cb38419..940752c 100644
--- a/synth/midi_synth.h
+++ b/synth/midi_synth.h
@@ -3,6 +3,7 @@
 #include "ivoice.h"
 #include "midi_event.h"
 #include "voice_allocator.h"
+#include <cstddef>
 #include <cstring>
 #include <vector>
 
@@ -13,9 +14,12 @@ namespace trnr {
 template <typename t_voice, typename t_sample>
 class midi_synth : public voice_allocator<t_voice, t_sample> {
 public:
-	midi_synth()
+	midi_synth(size_t voice_reserve = 1)
 		: m_voices_active {false}
 	{
+		// call base constructor with a reserve of 1 voice
+		voice_allocator<t_voice, t_sample>::set_voice_count(voice_reserve);
+
 		// checks whether template derives from ivoice
 		typedef t_voice assert_at_compile_time[is_convertible<t_voice, t_sample>::value ? 1 : -1];
 	}
diff --git a/synth/voice_allocator.h b/synth/voice_allocator.h
index bcbf9ea..1bb9786 100644
--- a/synth/voice_allocator.h
+++ b/synth/voice_allocator.h
@@ -3,6 +3,7 @@
 #include "ivoice.h"
 #include "midi_event.h"
 #include <algorithm>
+#include <cassert>
 #include <functional>
 #include <memory>
 #include <vector>
@@ -14,12 +15,14 @@ class voice_allocator {
 public:
 	std::vector<std::shared_ptr<t_voice>> voice_ptrs;
 
-	voice_allocator()
+	voice_allocator(size_t voice_reserve = 1)
 	{
 		// checks whether template derives from ivoice
 		typedef t_voice assert_at_compile_time[is_convertible<t_voice, t_sample>::value ? 1 : -1];
 
-		voice_ptrs.reserve(8);
+		assert(voice_reserve > 0 && "voice_reserve must be greater than 0");
+
+		voice_ptrs.reserve(voice_reserve);
 	}
 
 	void set_voice_count(const int& voice_count)