From 25b398ea000b5529084d985bd14ed066a81578d3 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Sun, 16 Jun 2019 10:47:33 +0200
Subject: Make max channnel count controllable through the configure script to
 make it possible to exceed the default 16.

---
 configure.ac               | 8 ++++++++
 drumgizmo/output/oss.cc    | 3 ++-
 plugin/drumgizmo_plugin.cc | 6 ++++--
 src/drumgizmo.cc           | 2 +-
 src/drumgizmo.h            | 9 +++++----
 test/lv2.cc                | 6 ++++--
 6 files changed, 24 insertions(+), 10 deletions(-)

diff --git a/configure.ac b/configure.ac
index ff226d0..5d8652a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -203,6 +203,14 @@ AM_CONDITIONAL([ENABLE_PUGL_X11], [test "x$enable_gui" = "xpugl-x11"])
 AM_CONDITIONAL([ENABLE_PUGL_WIN32], [test "x$enable_gui" = "xpugl-win32"])
 AM_CONDITIONAL([ENABLE_PUGL_COCOA], [test "x$enable_gui" = "xpugl-cocoa"])
 
+dnl ===========================
+dnl Custom number of outputs?
+dnl ===========================
+AC_ARG_ENABLE([custom-channel-count],
+	AS_HELP_STRING([--enable-custom-channel-count[=count]], [Compile with specified number of output channels [default=16]]),,
+        [enable_custom_channel_count="16"])
+AC_DEFINE_UNQUOTED([NUM_CHANNELS], [$enable_custom_channel_count], [Number of output channels])
+
 dnl ======================
 dnl Compile unit tests
 dnl ======================
diff --git a/drumgizmo/output/oss.cc b/drumgizmo/output/oss.cc
index 80d8d2b..cb0b896 100644
--- a/drumgizmo/output/oss.cc
+++ b/drumgizmo/output/oss.cc
@@ -31,10 +31,11 @@
 #include <unistd.h>
 #include <iostream>
 
+#include <config.h>
 
 OSSOutputEngine::OSSOutputEngine()
 	: dev{"/dev/dsp"}
-	, num_channels{16}
+	, num_channels{NUM_CHANNELS}
 	, srate{44100}
 	, format{AFMT_S32_NE}
 	, data{}
diff --git a/plugin/drumgizmo_plugin.cc b/plugin/drumgizmo_plugin.cc
index 1d03fd2..e7bc29e 100644
--- a/plugin/drumgizmo_plugin.cc
+++ b/plugin/drumgizmo_plugin.cc
@@ -26,6 +26,8 @@
  */
 #include "drumgizmo_plugin.h"
 
+#include <config.h>
+
 #include <cstring>
 #include <algorithm>
 #include <string>
@@ -110,7 +112,7 @@ size_t DrumGizmoPlugin::getNumberOfAudioInputs()
 
 size_t DrumGizmoPlugin::getNumberOfAudioOutputs()
 {
-	return 16;
+	return NUM_CHANNELS;
 }
 
 std::string DrumGizmoPlugin::getId()
@@ -148,7 +150,7 @@ PluginCategory DrumGizmoPlugin::getPluginCategory()
 	return PluginCategory::Synth;
 }
 
-static float g_samples[16*  4096];
+static float g_samples[NUM_CHANNELS *  4096];
 
 void DrumGizmoPlugin::process(size_t pos,
                               const std::vector<MidiEvent>& input_events,
diff --git a/src/drumgizmo.cc b/src/drumgizmo.cc
index 1e1974f..dcbb7bd 100644
--- a/src/drumgizmo.cc
+++ b/src/drumgizmo.cc
@@ -446,7 +446,7 @@ void DrumGizmo::setSamplerate(float samplerate)
 		buf.reset(new sample_t[MAX_RESAMPLER_BUFFER_SIZE]);
 	}
 
-	for(int c = 0; c < MAX_NUM_CHANNELS; ++c)
+	for(int c = 0; c < NUM_CHANNELS; ++c)
 	{
 		zita[c].reset();
 		auto nchan = 1u; // mono
diff --git a/src/drumgizmo.h b/src/drumgizmo.h
index 4592143..9d2e661 100644
--- a/src/drumgizmo.h
+++ b/src/drumgizmo.h
@@ -26,6 +26,8 @@
  */
 #pragma once
 
+#include <config.h>
+
 #include <string>
 #include <list>
 #include <array>
@@ -74,7 +76,6 @@ public:
 	void setRandomSeed(unsigned int seed);
 
 private:
-	static constexpr int MAX_NUM_CHANNELS = 64;
 	static constexpr int MAX_RESAMPLER_BUFFER_SIZE = 4096 * 8;
 
 protected:
@@ -83,7 +84,7 @@ protected:
 	AudioOutputEngine& oe;
 	AudioInputEngine& ie;
 
-	std::list< Event* > activeevents[MAX_NUM_CHANNELS];
+	std::list< Event* > activeevents[NUM_CHANNELS];
 
 	bool enable_resampling{true};
 
@@ -101,8 +102,8 @@ protected:
 	SettingsGetter settings_getter;
 
 	Random rand;
-	std::array<Resampler, MAX_NUM_CHANNELS> zita;
-	std::array<std::unique_ptr<sample_t>, MAX_NUM_CHANNELS> resampler_input_buffer;
+	std::array<Resampler, NUM_CHANNELS> zita;
+	std::array<std::unique_ptr<sample_t>, NUM_CHANNELS> resampler_input_buffer;
 	double ratio = 1.0;
 
 };
diff --git a/test/lv2.cc b/test/lv2.cc
index 0f80dea..0c86ad2 100644
--- a/test/lv2.cc
+++ b/test/lv2.cc
@@ -26,6 +26,8 @@
  */
 #include "dgunit.h"
 
+#include <config.h>
+
 #include <thread>
 #include <chrono>
 #include <memory.h>
@@ -379,7 +381,7 @@ public:
 
 		// Port buffers:
 		char sequence_buffer[4096];
-		float pcm_buffer[16][10];
+		float pcm_buffer[NUM_CHANNELS][10];
 		bool freeWheel = true;
 
 		// Free wheel port
@@ -389,7 +391,7 @@ public:
 		res = h.connectPort((int)Ports::MidiPort, seq.data());
 		DGUNIT_ASSERT_EQUAL(0, res);
 
-		for(int i = 0; i < 16; ++i)
+		for(int i = 0; i < NUM_CHANNELS; ++i)
 		{
 			for(int j = 0; j < 10; ++j)
 			{
-- 
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