From: hackbard Date: Tue, 11 Feb 2003 04:31:01 +0000 (+0000) Subject: first tries - midiio api X-Git-Url: https://hackdaworld.org/gitweb/?a=commitdiff_plain;h=8a7200376cabda36b0d4de133316d73f135701e1;p=sound-tools%2Fossmidi.git first tries - midiio api --- 8a7200376cabda36b0d4de133316d73f135701e1 diff --git a/midiio.c b/midiio.c new file mode 100644 index 0000000..06f547c --- /dev/null +++ b/midiio.c @@ -0,0 +1,96 @@ +/* midiio.c + * + * author: hackbard + * + */ + +#include +#include +#include + +#include +#include +#include +#include + +#include + +#include "midiio.h" + +/* soem defines */ +#define MIDI_DEVICE /dev/midi +#define NOTE_ON 0x90 +#define NOTE_OFF 0x80 +#define NOTE_DATA 0x7F +#define CH_MASK 0x0F +#define VEL_MASK 0x7F + + +/* global, do we need sockets global? */ +int midi_fd; + +int all_stop(int fd) { + int i,j; + for(j=0;j<16;j++) + for(i=0;i<128;i++) + note_off(fd,j,i,(int)0x7F); + return 0; +} + +int midi_write_msg3(int fd,unsigned char status,unsigned char data1,unsigned char data2) { + unsigned char buf[3]; + buf[0]=status; + buf[1]=data1; + buf[2]=data2; + write(fd,buf,3); + return 0; +} + +int midi_write_msg2(int fd,unsigned char status,unsigned char data1) { + unsigned char buf[2]; + buf[0]=status; + buf[1]=data1; + write(fd,buf,2); + return 0; +} + +int note_on(int fd,int chan,int note,int vel) { + midi_write_msg3(fd,NOTE_ON|(CH_MASK&chan),note&NOTE_DATA,vel&VEL_MASK); + return 0; +} + +int note_off(int fd,int chan,int note,int vel) { + midi_write_msg3(fd,NOTE_OFF|(CH_MASK&chan),note&NOTE_DATA,vel&VEL_MASK); + return 0; +} + +#ifdef TEST_API +/* test the io api ... */ + +int main(int argc,char **argv) { + + int note,channel,i; + + if(argc>1) { + note=atoi(argv[2]); + channel=atoi(argv[1]); + } + + midi_fd=open("/dev/sound/midi",O_RDWR); + + all_stop(midi_fd); + sleep(2); + + for(i=0;i<4;i++) { + note_off(midi_fd,0,38,127); + note_on(midi_fd,0,38,127); + sleep(1); + note_off(midi_fd,0,42,127); + note_on(midi_fd,0,42,127); + sleep(1); + } + + close(midi_fd); +} +#endif TEST_API + diff --git a/midiio.h b/midiio.h new file mode 100644 index 0000000..1925eca --- /dev/null +++ b/midiio.h @@ -0,0 +1,9 @@ +/* function prototypes */ + +int all_stop(int fd); +int midi_write_msg3(int fd,unsigned char status,unsigned char data1,unsigned char data2); +int midi_write_msg2(int fd,unsigned char status,unsigned char data1); +int note_on(int fd,int chan,int note,int vel); +int note_off(int fd,int chan,int note,int vel); + +