reorganized

svn path=/trunk/; revision=9400

1 files changed, 209 insertions, 0 deletions

diff --git a/desiredata/src/s_midi_alsa.c b/desiredata/src/s_midi_alsa.c
new file mode 100644
index 00000000..894d7200
--- /dev/null
+++ b/desiredata/src/s_midi_alsa.c
@@ -0,0 +1,209 @@
+/* Copyright (c) 1997-1999 Guenter Geiger, Miller Puckette, Larry Troxler,
+* Winfried Ritsch, Karl MacMillan, and others.
+* For information on usage and redistribution, and for a DISCLAIMER OF ALL
+* WARRANTIES, see the file, "LICENSE.txt," in this distribution.  */
+
+/* MIDI I/O for Linux using ALSA */
+
+#include <stdio.h>
+#ifdef UNISTD
+#include <unistd.h>
+#endif
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <alsa/asoundlib.h>
+#include "desire.h"
+//#include "s_stuff.h"
+
+#define MAX_EVENT_SIZE 256
+
+static int alsa_nmidiin;
+static int alsa_midiinfd[MAXMIDIINDEV];
+static int alsa_nmidiout;
+static int alsa_midioutfd[MAXMIDIOUTDEV];
+static snd_seq_t *midi_handle;
+static snd_midi_event_t *midiev;
+
+static unsigned short CombineBytes(unsigned char First, unsigned char Second) {
+    return ((unsigned short)Second << 7) | (unsigned short)First;
+}
+
+void sys_alsa_do_open_midi(int nmidiin, int *midiinvec, int nmidiout, int *midioutvec) {
+    char portname[50];
+    int err = 0;
+    snd_seq_client_info_t *alsainfo;
+    /* do we want to connect pd automatically with other devices ?; see below! */
+    /* LATER: think about a flag to enable/disable automatic connection (sometimes it could be a pain) */
+    int autoconnect = 1;
+    alsa_nmidiin = 0;
+    alsa_nmidiout = 0;
+    if (nmidiout == 0 && nmidiin == 0) return;
+    if (nmidiin>MAXMIDIINDEV)   {post( "midi input ports reduced to maximum %d", MAXMIDIINDEV);  nmidiin =MAXMIDIINDEV;}
+    if (nmidiout>MAXMIDIOUTDEV) {post("midi output ports reduced to maximum %d", MAXMIDIOUTDEV); nmidiout=MAXMIDIOUTDEV;}
+    if (nmidiin>0 && nmidiout>0) err = snd_seq_open(&midi_handle,"default",SND_SEQ_OPEN_DUPLEX,0);
+    else if (nmidiin > 0)        err = snd_seq_open(&midi_handle,"default",SND_SEQ_OPEN_INPUT,0);
+    else if (nmidiout > 0)       err = snd_seq_open(&midi_handle,"default",SND_SEQ_OPEN_OUTPUT,0);
+    if (err!=0) {
+	    sys_setalarm(1000000);
+	    post("couldn't open alsa sequencer");
+	    return;
+    }
+    int client;
+    for (int i=0; i<nmidiin; i++) {
+        sprintf(portname,"Pure Data Midi-In %d",i+1);
+        int port = snd_seq_create_simple_port(midi_handle,portname,
+		SND_SEQ_PORT_CAP_WRITE |SND_SEQ_PORT_CAP_SUBS_WRITE, SND_SEQ_PORT_TYPE_APPLICATION);
+        if (port < 0) goto error;
+	alsa_midiinfd[i] = port;
+    }
+    for (int i=0; i<nmidiout; i++) {
+        sprintf(portname,"Pure Data Midi-Out %d",i+1);
+        int port = snd_seq_create_simple_port(midi_handle,portname,
+		SND_SEQ_PORT_CAP_READ | SND_SEQ_PORT_CAP_SUBS_READ, SND_SEQ_PORT_TYPE_APPLICATION);
+        if (port < 0) goto error;
+	alsa_midioutfd[i] = port;
+    }
+    snd_seq_client_info_malloc(&alsainfo);
+    snd_seq_get_client_info(midi_handle,alsainfo);
+    snd_seq_client_info_set_name(alsainfo,"Pure Data");
+    client = snd_seq_client_info_get_client(alsainfo);
+    snd_seq_set_client_info(midi_handle,alsainfo);
+    snd_seq_client_info_free(alsainfo);
+    post("Opened Alsa Client %d in:%d out:%d",client,nmidiin,nmidiout);
+    sys_setalarm(0);
+    snd_midi_event_new(MAX_EVENT_SIZE,&midiev);
+    alsa_nmidiout = nmidiout;
+    alsa_nmidiin = nmidiin;
+    /* JMZ: connect all available devices to pd */
+    if (autoconnect) {
+        snd_seq_client_info_t *cinfo;
+        snd_seq_port_info_t *pinfo;
+        snd_seq_port_subscribe_t *subs;
+        snd_seq_addr_t other, topd, frompd;
+        /* since i don't know how to connect multiple ports (connect everything to each port, modulo,...),
+         * i only fully connect where we have only one single port */
+        if(alsa_nmidiin ) {  topd.client = client;   topd.port   = alsa_midiinfd [0];}
+        if(alsa_nmidiout) {frompd.client = client; frompd.port   = alsa_midioutfd[0];}
+        snd_seq_port_subscribe_alloca(&subs);
+        snd_seq_client_info_alloca(&cinfo);
+        snd_seq_port_info_alloca(&pinfo);
+        snd_seq_client_info_set_client(cinfo, -1);
+        while (snd_seq_query_next_client(midi_handle, cinfo) >= 0) {
+            /* reset query info */
+            int client_id=snd_seq_client_info_get_client(cinfo);
+            if((SND_SEQ_CLIENT_SYSTEM != client_id)&&(client != client_id)) { /* skipping port 0 and ourself */
+                snd_seq_port_info_set_client(pinfo, client_id);
+                snd_seq_port_info_set_port(pinfo, -1);
+                while (snd_seq_query_next_port(midi_handle, pinfo) >= 0) {
+                    other.client=client_id;
+                    other.port  =snd_seq_port_info_get_port(pinfo);
+                    if(1==alsa_nmidiin) /* only autoconnect 1st port */ {
+                        snd_seq_port_subscribe_set_sender(subs, &other);
+                        snd_seq_port_subscribe_set_dest(subs, &topd);
+                        snd_seq_subscribe_port(midi_handle, subs);
+                    }
+                    if(1==alsa_nmidiout) /* only autoconnect 1st port */ {
+                        snd_seq_port_subscribe_set_sender(subs, &frompd);
+                        snd_seq_port_subscribe_set_dest(subs, &other);
+                        snd_seq_subscribe_port(midi_handle, subs);
+                    }
+                }
+            }
+        }
+    }
+    return;
+ error:
+    sys_setalarm(1000000);
+    post("couldn't open alsa MIDI output device");
+    return;
+}
+
+#define md_msglen(x) (((x)<0xC0)?2:((x)<0xE0)?1:((x)<0xF0)?2:\
+    ((x)==0xF2)?2:((x)<0xF4)?1:0)
+
+void sys_alsa_putmidimess(int portno, int a, int b, int c) {
+    int channel = a&15;
+    snd_seq_event_t ev;
+    snd_seq_ev_clear(&ev);
+    if (portno >= 0 && portno < alsa_nmidiout) {
+        if (a >= 224) { // pitchbend
+    	    snd_seq_ev_set_pitchbend(&ev,channel,CombineBytes(b,c));
+        } else if (a >= 208) { // touch
+	    snd_seq_ev_set_chanpress(&ev,channel,b);
+        } else if (a >= 192) { // program
+	    snd_seq_ev_set_pgmchange(&ev,channel,b);
+        } else if (a >= 176) { // controller
+    	    snd_seq_ev_set_controller(&ev,channel,b,c);
+        } else if (a >= 160) { // polytouch
+	    snd_seq_ev_set_keypress(&ev,channel,b,c);
+        } else if (a >= 144) { // note
+            channel = a-144;
+            if (c) snd_seq_ev_set_noteon(&ev,channel,b,c);
+            else   snd_seq_ev_set_noteoff(&ev,channel,b,c);
+        }
+        snd_seq_ev_set_direct(&ev);
+        snd_seq_ev_set_subs(&ev);
+        snd_seq_ev_set_source(&ev,alsa_midioutfd[portno]);
+        snd_seq_event_output_direct(midi_handle,&ev);
+    }
+}
+
+void sys_alsa_putmidibyte(int portno, int byte) {
+    snd_seq_event_t ev;
+    snd_seq_ev_clear(&ev);
+    if (portno >= 0 && portno < alsa_nmidiout) {
+        // repack into 1 byte char and put somewhere to point at
+        unsigned char data = (unsigned char)byte;
+        snd_seq_ev_set_sysex(&ev,1,&data); //...set_variable *should* have worked but didn't
+        snd_seq_ev_set_direct(&ev);
+        snd_seq_ev_set_subs(&ev);
+        snd_seq_ev_set_source(&ev,alsa_midioutfd[portno]);
+        snd_seq_event_output_direct(midi_handle,&ev);
+    }
+}
+
+/* this version uses the asynchronous "read()" ... */
+void sys_alsa_poll_midi() {
+   unsigned char buf[MAX_EVENT_SIZE];
+   int count, alsa_source;
+   snd_seq_event_t *midievent = NULL;
+   if (alsa_nmidiout == 0 && alsa_nmidiin == 0) return;
+   snd_midi_event_init(midiev);
+   if (!alsa_nmidiout && !alsa_nmidiin) return;
+   count = snd_seq_event_input_pending(midi_handle,1);
+   if (count != 0) count = snd_seq_event_input(midi_handle,&midievent);
+   if (midievent != NULL) {
+       count = snd_midi_event_decode(midiev,buf,sizeof(buf),midievent);
+       alsa_source = midievent->dest.port;
+       for(int i=0; i<count; i++) sys_midibytein(alsa_source, (buf[i] & 0xff));
+       //post("received %d midi bytes",count);
+   }
+}
+
+void sys_alsa_close_midi() {
+    alsa_nmidiin = alsa_nmidiout = 0;
+    if(midi_handle) {
+        snd_seq_close(midi_handle);
+        if(midiev) snd_midi_event_free(midiev);
+    }
+}
+
+#define NSEARCH 10
+static int alsa_nmidiindevs, alsa_nmidioutdevs, alsa_initted;
+
+void midi_alsa_init() {
+    if (alsa_initted) return;
+    alsa_initted = 1;
+}
+
+void midi_alsa_getdevs(char *indevlist, int *nindevs, char *outdevlist, int *noutdevs, int maxndev, int devdescsize) {
+    int ndev = min(maxndev,alsa_nmidiindevs);
+    for (int i=0; i<ndev; i++) sprintf(indevlist + i * devdescsize, "ALSA MIDI device #%d", i+1);
+    *nindevs = ndev;
+    ndev    = min(maxndev,alsa_nmidioutdevs);
+    for (int i=0; i<ndev; i++) sprintf(outdevlist + i * devdescsize, "ALSA MIDI device #%d", i+1);
+    *noutdevs = ndev;
+}