midi plugin: make local functions static where possible

Change-Id: I702755529f98015586b5b9592ced75cf7591880c

apps/plugins/midi/guspat.c

@@ -37,12 +37,12 @@ const uint32_t gustable[]=
   4186073, 4434930, 4698645, 4978041, 5274051, 5587663, 5919922, 6271939, 6644889, 7040015, 7458636, 7902150
 };
 
-unsigned int readWord(int file)
+static unsigned int readWord(int file)
 {
     return (readChar(file)<<0) | (readChar(file)<<8); // | (readChar(file)<<8) | (readChar(file)<<0);
 }
 
-unsigned int readDWord(int file)
+static unsigned int readDWord(int file)
 {
     return (readChar(file)<<0) | (readChar(file)<<8) | (readChar(file)<<16) | (readChar(file)<<24);
 }
@@ -50,7 +50,7 @@ unsigned int readDWord(int file)
 int curr_waveform;
 struct GWaveform waveforms[256] IBSS_ATTR;
 
-struct GWaveform * loadWaveform(int file)
+static struct GWaveform * loadWaveform(int file)
 {
     struct GWaveform * wav = &waveforms[curr_waveform++];
     rb->memset(wav, 0, sizeof(struct GWaveform));
@@ -137,7 +137,7 @@ struct GWaveform * loadWaveform(int file)
     return wav;
 }
 
-int selectWaveform(struct GPatch * pat, int midiNote)
+static int selectWaveform(struct GPatch * pat, int midiNote)
 {
     /* We divide by 100 here because everyone's freq formula is slightly different */
     unsigned int tabFreq = gustable[midiNote]/100; /* Comparison */

apps/plugins/midi/midifile.c

@@ -20,6 +20,7 @@
  ****************************************************************************/
 #include "plugin.h"
 #include "midiutil.h"
+#include "midifile.h"
 
 struct Track * readTrack(int file);
 int readID(int file);
@@ -125,7 +126,7 @@ struct MIDIfile * loadFile(const char * filename)
 
 int rStatus = 0;
 /* Returns 0 if done, 1 if keep going */
-int readEvent(int file, void * dest)
+static int readEvent(int file, void * dest)
 {
     struct Event dummy;
     struct Event * ev = (struct Event *) dest;

apps/plugins/midi/midiplay.c

@@ -319,7 +319,7 @@ static inline void synthbuf(void)
     samples_in_buf = BUF_SIZE-i;
 }
 
-void get_more(unsigned char** start, size_t* size)
+static void get_more(unsigned char** start, size_t* size)
 {
 #ifndef SYNC
     if(lastswap != swap)

apps/plugins/midi/midiutil.c

@@ -37,7 +37,7 @@ struct GPatch * drumSet[128];
 
 struct SynthObject voices[MAX_VOICES] IBSS_ATTR;
 
-void *alloc(int size)
+static void *alloc(int size)
 {
     static char *offset = NULL;
     static size_t totalSize = 0;

apps/plugins/midi/sequencer.c

@@ -22,6 +22,7 @@
 #include "midiutil.h"
 #include "guspat.h"
 #include "synth.h"
+#include "sequencer.h"
 
 long tempo = 375000;
 

apps/plugins/midi/sequencer.h

@@ -22,7 +22,6 @@
 int tick(void);
 
 /* used by beatbox */
-void pressNote(int ch, int note, int vol);
 void rewindFile(void);
 
 void seekForward(int nSec);

apps/plugins/midi/synth.c

@@ -23,7 +23,7 @@
 #include "midiutil.h"
 #include "synth.h"
 
-void readTextBlock(int file, char * buf)
+static void readTextBlock(int file, char * buf)
 {
     char c = 0;
     do