From d97a417012d7e510b08c2e7d9a71997605c48e88 Mon Sep 17 00:00:00 2001
From: Chris Xiong <chirs241097@gmail.com>
Date: Wed, 1 Jun 2016 23:02:21 +0800
Subject: Initial event modifier and event filter stub.

---
 core/qmpmidiplay.cpp |  2 ++
 core/qmpmidiplay.hpp |  7 ++++++-
 core/qmpmidiread.cpp | 15 ++++++++++++++-
 3 files changed, 22 insertions(+), 2 deletions(-)

(limited to 'core')

diff --git a/core/qmpmidiplay.cpp b/core/qmpmidiplay.cpp
index 855ccb7..31784e3 100644
--- a/core/qmpmidiplay.cpp
+++ b/core/qmpmidiplay.cpp
@@ -574,3 +574,5 @@ int CMidiPlayer::setEventReaderCB(IMidiCallBack *cb,void *userdata)
 }
 void CMidiPlayer::unsetEventReaderCB(int id)
 {eventReaderCB[id]=NULL;eventReaderCBuserdata[id]=NULL;}
+void CMidiPlayer::discardLastEvent(){midiFile?midiFile->discardLastEvent():(void)0;}
+void CMidiPlayer::commitEventChange(SEventCallBackData d){midiFile?midiFile->commitEventChange(d):(void)0;}
diff --git a/core/qmpmidiplay.hpp b/core/qmpmidiplay.hpp
index f922940..6436192 100644
--- a/core/qmpmidiplay.hpp
+++ b/core/qmpmidiplay.hpp
@@ -29,7 +29,7 @@ class CMidiFile
 		uint32_t std;//standard 0=? 1=GM 2=GM2 3=GS 4=XG
 		uint32_t fmt,trk,divs;
 		FILE *f;
-		int byteread,valid;
+		int byteread,valid,eventdiscarded;
 		uint32_t notes,curt,curid;
 		IMidiCallBack* eventReaderCB[16];
 		void* eventReaderCBuserdata[16];
@@ -54,6 +54,8 @@ class CMidiFile
 		const char* getTitle();
 		const char* getCopyright();
 		bool isValid();
+		void discardLastEvent();
+		void commitEventChange(SEventCallBackData d);
 };
 class CMidiPlayer
 {
@@ -161,5 +163,8 @@ class CMidiPlayer
 		void unsetEventHandlerCB(int id);
 		int setEventReaderCB(IMidiCallBack *cb,void *userdata);
 		void unsetEventReaderCB(int id);
+
+		void discardLastEvent();
+		void commitEventChange(SEventCallBackData d);
 };
 #endif
diff --git a/core/qmpmidiread.cpp b/core/qmpmidiread.cpp
index 9b1d932..33a1bd4 100644
--- a/core/qmpmidiread.cpp
+++ b/core/qmpmidiread.cpp
@@ -50,7 +50,7 @@ int CMidiFile::eventReader()//returns 0 if End of Track encountered
 {
 	uint32_t delta=readVL();curt+=delta;
 	char type=fgetc(f);++byteread;uint32_t p1,p2;
-	static char lasttype;
+	static char lasttype;eventdiscarded=0;
 	if(!(type&0x80)){fseek(f,-1,SEEK_CUR);--byteread;type=lasttype;}
 	switch(type&0xF0)
 	{
@@ -257,3 +257,16 @@ uint32_t CMidiFile::getStandard(){return std;}
 bool CMidiFile::isValid(){return valid;}
 const char* CMidiFile::getTitle(){return title;}
 const char* CMidiFile::getCopyright(){return copyright;}
+
+void CMidiFile::discardLastEvent()
+{
+	if(eventdiscarded)return;eventdiscarded=1;
+	delete eventList[eventList.size()-1];eventList.pop_back();
+}
+void CMidiFile::commitEventChange(SEventCallBackData d)
+{
+	eventList[eventList.size()-1]->time=d.time;
+	eventList[eventList.size()-1]->type=d.type;
+	eventList[eventList.size()-1]->p1=d.p1;
+	eventList[eventList.size()-1]->p2=d.p2;
+}
-- 
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