gearmulator

commit 1664f0afadf7924d60273f98c5b3c400278b2d49
parent 9a80373293be6f1f5b0f7128f434ec3ac6ee73c9
Author: dsp56300 <dsp56300@users.noreply.github.com>
Date:   Tue, 17 May 2022 00:08:51 +0200

add midi packet parsing

Diffstat:
M
source/jucePluginLib/midipacket.cpp
 | 
66
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
M
source/jucePluginLib/midipacket.h
 | 
3
+++

2 files changed, 69 insertions(+), 0 deletions(-)
diff --git a/source/jucePluginLib/midipacket.cpp b/source/jucePluginLib/midipacket.cpp
@@ -1,5 +1,9 @@
 #include "midipacket.h"
 
+#include <cassert>
+
+#include "parameterdescriptions.h"
+
 #include "../dsp56300/source/dsp56kEmu/logging.h"
 
 namespace pluginLib
@@ -35,4 +39,66 @@ namespace pluginLib
 		}
 		return true;
 	}
+
+	bool MidiPacket::parse(std::map<MidiDataType, uint8_t>& _data, std::map<uint32_t, uint8_t>& _parameterValues, const ParameterDescriptions& _parameters, const std::vector<uint8_t>& _src) const
+	{
+		if(_src.size() != size())
+			return false;
+
+		for(size_t i=0; i<_src.size(); ++i)
+		{
+			const auto& b = m_bytes[i];
+			const auto s = _src[i];
+
+			switch (b.type)
+			{
+			case MidiDataType::Null: 
+				continue;
+			case MidiDataType::Byte:
+				if(b.byte != s)
+					return false;
+				break;
+			case MidiDataType::Checksum:
+				{
+					uint8_t checksum = 0;
+
+					for(uint32_t c = b.checksumFirstIndex; c <= b.checksumLastIndex; ++c)
+						checksum += _src[c];
+
+					checksum &= 0x7f;
+
+					if(checksum != s)
+					{
+						LOG("Packet checksum error, calculated " << std::hex << checksum << " but data contains " << s);
+						return false;
+					}
+				}
+				continue;
+			case MidiDataType::DeviceId:
+			case MidiDataType::Bank:
+			case MidiDataType::Program:
+			case MidiDataType::ParameterIndex:
+			case MidiDataType::ParameterValue:
+			case MidiDataType::Page:
+			case MidiDataType::Part:
+				_data.insert(std::make_pair(b.type, s));
+				break;
+			case MidiDataType::Parameter:
+				{
+					uint32_t idx;
+					if(!_parameters.getIndexByName(idx, b.name))
+					{
+						LOG("Failed to find named parameter " << b.name << " while parsing midi packet, midi byte " << i);
+						return false;
+					}
+					_parameterValues.insert(std::make_pair(idx, s));
+				}
+				break;
+			default:
+				assert(false && "unknown data type");
+				return false;
+			}
+		}
+		return true;
+	}
 }
diff --git a/source/jucePluginLib/midipacket.h b/source/jucePluginLib/midipacket.h
@@ -7,6 +7,8 @@
 
 namespace pluginLib
 {
+	class ParameterDescriptions;
+
 	enum class MidiDataType
 	{
 		Null,
@@ -42,6 +44,7 @@ namespace pluginLib
 		size_t size() const { return m_bytes.size(); }
 
 		bool create(std::vector<uint8_t>& _dst, const std::map<MidiDataType, uint8_t>& _data) const;
+		bool parse(std::map<MidiDataType, uint8_t>& _data, std::map<uint32_t, uint8_t>& _parameterValues, const ParameterDescriptions& _parameters, const std::vector<uint8_t>& _src) const;
 
 	private:
 		std::vector<MidiByte> m_bytes;