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libcm/linux/cmMidiAlsa.c

884 行
26 KiB
C
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#include "cmPrefix.h"
#include "cmGlobal.h"
#include "cmRpt.h"
#include "cmErr.h"
#include "cmCtx.h"
#include "cmMem.h"
#include "cmMallocDebug.h"
#include "cmLinkedHeap.h"
#include "cmThread.h"
#include "cmTime.h"
#include "cmMidi.h"
#include "cmMidiPort.h"
#include <alsa/asoundlib.h>
typedef struct
{
bool inputFl; // true if this an input port
char* nameStr; // string label of this device
unsigned alsa_type; // ALSA type flags from snd_seq_port_info_get_type()
unsigned alsa_cap; // ALSA capability flags from snd_seq_port_info_get_capability()
snd_seq_addr_t alsa_addr; // ALSA client/port address for this port
cmMpParserH_t parserH; // interface to the client callback function for this port
} cmMpPort_t;
// MIDI devices
typedef struct
{
char* nameStr; // string label for this device
unsigned iPortCnt; // input ports on this device
cmMpPort_t* iPortArray;
unsigned oPortCnt; // output ports on this device
cmMpPort_t* oPortArray;
unsigned char clientId; // ALSA client id (all ports on this device use use this client id in their address)
} cmMpDev_t;
typedef struct
{
cmErr_t err; // error object
cmLHeapH_t lH; // linked heap used for all internal memory
unsigned devCnt; // MIDI devices attached to this computer
cmMpDev_t* devArray;
cmMpCallback_t cbFunc; // MIDI input application callback
void* cbDataPtr;
snd_seq_t* h; // ALSA system sequencer handle
snd_seq_addr_t alsa_addr; // ALSA client/port address representing the application
int alsa_queue; // ALSA device queue
cmThreadH_t thH; // MIDI input listening thread
int alsa_fdCnt; // MIDI input driver file descriptor array
struct pollfd* alsa_fd;
cmMpDev_t* prvRcvDev; // the last device and port to rcv MIDI
cmMpPort_t* prvRcvPort;
unsigned prvTimeMicroSecs; // time of last recognized event in microseconds
unsigned eventCnt; // count of recognized events
cmTimeSpec_t baseTimeStamp;
} cmMpRoot_t;
cmMpRoot_t* _cmMpRoot = NULL;
cmMpRC_t _cmMpErrMsgV(cmErr_t* err, cmMpRC_t rc, int alsaRc, const cmChar_t* fmt, va_list vl )
{
if( alsaRc < 0 )
cmErrMsg(err,kSysErrMpRC,"ALSA Error:%i %s",alsaRc,snd_strerror(alsaRc));
return cmErrVMsg(err,rc,fmt,vl);
}
cmMpRC_t _cmMpErrMsg(cmErr_t* err, cmMpRC_t rc, int alsaRc, const cmChar_t* fmt, ... )
{
va_list vl;
va_start(vl,fmt);
rc = _cmMpErrMsgV(err,rc,alsaRc,fmt,vl);
va_end(vl);
return rc;
}
unsigned _cmMpGetPortCnt( snd_seq_t* h, snd_seq_port_info_t* pip, bool inputFl )
{
unsigned i = 0;
snd_seq_port_info_set_port(pip,-1);
while( snd_seq_query_next_port(h,pip) == 0)
if( cmIsFlag(snd_seq_port_info_get_capability(pip),inputFl?SND_SEQ_PORT_CAP_READ:SND_SEQ_PORT_CAP_WRITE) )
++i;
return i;
}
cmMpDev_t* _cmMpClientIdToDev( int clientId )
{
cmMpRoot_t* p = _cmMpRoot;
unsigned i;
for(i=0; i<p->devCnt; ++i)
if( p->devArray[i].clientId == clientId )
return p->devArray + i;
return NULL;
}
cmMpPort_t* _cmMpInPortIdToPort( cmMpDev_t* dev, int portId )
{
unsigned i;
for(i=0; i<dev->iPortCnt; ++i)
if( dev->iPortArray[i].alsa_addr.port == portId )
return dev->iPortArray + i;
return NULL;
}
void _cmMpSplit14Bits( unsigned v, cmMidiByte_t* d0, cmMidiByte_t* d1 )
{
*d0 = (v & 0x3f80) >> 7;
*d1 = v & 0x7f;
}
cmMpRC_t cmMpPoll()
{
cmMpRC_t rc = kOkMpRC;
cmMpRoot_t* p = _cmMpRoot;
int timeOutMs = 50;
snd_seq_event_t *ev;
if (poll(p->alsa_fd, p->alsa_fdCnt, timeOutMs) > 0)
{
int rc = 1;
do
{
rc = snd_seq_event_input(p->h,&ev);
// if no input
if( rc == -EAGAIN )
break;
// if input buffer overrun
if( rc == -ENOSPC )
break;
// get the device this event arrived from
if( p->prvRcvDev==NULL || p->prvRcvDev->clientId != ev->source.client )
p->prvRcvDev = _cmMpClientIdToDev(ev->source.client);
// get the port this event arrived from
if( p->prvRcvDev != NULL && (p->prvRcvPort==NULL || p->prvRcvPort->alsa_addr.port != ev->source.port) )
p->prvRcvPort = _cmMpInPortIdToPort(p->prvRcvDev,ev->source.port);
if( p->prvRcvDev == NULL || p->prvRcvPort == NULL )
continue;
//printf("%i %x\n",ev->type,ev->type);
//printf("dev:%i port:%i ch:%i %i\n",ev->source.client,ev->source.port,ev->data.note.channel,ev->data.note.note);
unsigned microSecs1 = (ev->time.time.tv_sec * 1000000) + (ev->time.time.tv_nsec/1000);
//unsigned deltaMicroSecs = p->prvTimeMicroSecs==0 ? 0 : microSecs1 - p->prvTimeMicroSecs;
cmMidiByte_t d0 = 0xff;
cmMidiByte_t d1 = 0xff;
cmMidiByte_t status = 0;
switch(ev->type)
{
//
// MIDI Channel Messages
//
case SND_SEQ_EVENT_NOTEON:
status = kNoteOnMdId;
d0 = ev->data.note.note;
d1 = ev->data.note.velocity;
//printf("%s (%i : %i) (%i)\n", snd_seq_ev_is_abstime(ev)?"abs":"rel",ev->time.time.tv_sec,ev->time.time.tv_nsec, deltaMicroSecs/1000);
break;
case SND_SEQ_EVENT_NOTEOFF:
status = kNoteOffMdId;
d0 = ev->data.note.note;
d1 = ev->data.note.velocity;
break;
case SND_SEQ_EVENT_KEYPRESS:
status = kPolyPresMdId;
d0 = ev->data.note.note;
d1 = ev->data.note.velocity;
break;
case SND_SEQ_EVENT_PGMCHANGE:
status = kPgmMdId;
d0 = ev->data.control.param;
d1 = 0xff;
break;
case SND_SEQ_EVENT_CHANPRESS:
status = kChPresMdId;
d0 = ev->data.control.param;
d1 = 0xff;
break;
case SND_SEQ_EVENT_CONTROLLER:
status = kCtlMdId;
d0 = ev->data.control.param;
d1 = ev->data.control.value;
break;
case SND_SEQ_EVENT_PITCHBEND:
_cmMpSplit14Bits(ev->data.control.value + 8192, &d0, &d1 );
status = kPbendMdId;
break;
//
// MIDI System Common Messages
//
case SND_SEQ_EVENT_QFRAME:
status = kSysComMtcMdId;
d0 = ev->data.control.value;
break;
case SND_SEQ_EVENT_SONGPOS:
_cmMpSplit14Bits(ev->data.control.value, &d0, &d1 );
status = kSysComSppMdId;
break;
case SND_SEQ_EVENT_SONGSEL:
status = kSysComSelMdId;
d0 = ev->data.control.value;
break;
case SND_SEQ_EVENT_TUNE_REQUEST:
status = kSysComTuneMdId;
break;
//
// MIDI System Real-time Messages
//
case SND_SEQ_EVENT_CLOCK: status = kSysRtClockMdId; break;
case SND_SEQ_EVENT_START: status = kSysRtStartMdId; break;
case SND_SEQ_EVENT_CONTINUE: status = kSysRtContMdId; break;
case SND_SEQ_EVENT_STOP: status = kSysRtStopMdId; break;
case SND_SEQ_EVENT_SENSING: status = kSysRtSenseMdId; break;
case SND_SEQ_EVENT_RESET: status = kSysRtResetMdId; break;
}
if( status != 0 )
{
cmMidiByte_t ch = ev->data.note.channel;
cmTimeSpec_t ts;
ts.tv_sec = p->baseTimeStamp.tv_sec + ev->time.time.tv_sec;
ts.tv_nsec = p->baseTimeStamp.tv_nsec + ev->time.time.tv_nsec;
if( ts.tv_nsec > 1000000000 )
{
ts.tv_nsec -= 1000000000;
ts.tv_sec += 1;
}
//printf("MIDI: %ld %ld : 0x%x %i %i\n",ts.tv_sec,ts.tv_nsec,status,d0,d1);
cmMpParserMidiTriple(p->prvRcvPort->parserH, &ts, status | ch, d0, d1 );
p->prvTimeMicroSecs = microSecs1;
p->eventCnt += 1;
}
}while( snd_seq_event_input_pending(p->h,0));
cmMpParserTransmit(p->prvRcvPort->parserH);
}
return rc;
}
bool _cmMpThreadFunc(void* param)
{
cmMpPoll();
return true;
}
cmMpRC_t _cmMpAllocStruct( cmMpRoot_t* p, const cmChar_t* appNameStr, cmMpCallback_t cbFunc, void* cbDataPtr, unsigned parserBufByteCnt, cmRpt_t* rpt )
{
cmMpRC_t rc = kOkMpRC;
snd_seq_client_info_t* cip = NULL;
snd_seq_port_info_t* pip = NULL;
snd_seq_port_subscribe_t *subs = NULL;
unsigned i,j,k,arc;
// alloc the subscription recd on the stack
snd_seq_port_subscribe_alloca(&subs);
// alloc the client recd
if((arc = snd_seq_client_info_malloc(&cip)) < 0 )
{
rc = _cmMpErrMsg(&p->err,kSysErrMpRC,arc,"ALSA seq client info allocation failed.");
goto errLabel;
}
// alloc the port recd
if((arc = snd_seq_port_info_malloc(&pip)) < 0 )
{
rc = _cmMpErrMsg(&p->err,kSysErrMpRC,arc,"ALSA seq port info allocation failed.");
goto errLabel;
}
if((p->alsa_queue = snd_seq_alloc_queue(p->h)) < 0 )
{
rc = _cmMpErrMsg(&p->err,kSysErrMpRC,p->alsa_queue,"ALSA queue allocation failed.");
goto errLabel;
}
// Set arbitrary tempo (mm=100) and resolution (240) (FROM RtMidi.cpp)
/*
snd_seq_queue_tempo_t *qtempo;
snd_seq_queue_tempo_alloca(&qtempo);
snd_seq_queue_tempo_set_tempo(qtempo, 600000);
snd_seq_queue_tempo_set_ppq(qtempo, 240);
snd_seq_set_queue_tempo(p->h, p->alsa_queue, qtempo);
snd_seq_drain_output(p->h);
*/
// setup the client port
snd_seq_set_client_name(p->h,appNameStr);
snd_seq_port_info_set_client(pip, p->alsa_addr.client = snd_seq_client_id(p->h) );
snd_seq_port_info_set_name(pip,cmStringNullGuard(appNameStr));
snd_seq_port_info_set_capability(pip,SND_SEQ_PORT_CAP_READ | SND_SEQ_PORT_CAP_WRITE | SND_SEQ_PORT_CAP_DUPLEX | SND_SEQ_PORT_CAP_SUBS_READ | SND_SEQ_PORT_CAP_SUBS_WRITE );
snd_seq_port_info_set_type(pip, SND_SEQ_PORT_TYPE_SOFTWARE | SND_SEQ_PORT_TYPE_APPLICATION | SND_SEQ_PORT_TYPE_MIDI_GENERIC );
snd_seq_port_info_set_midi_channels(pip, 16);
// cfg for real-time time stamping
snd_seq_port_info_set_timestamping(pip, 1);
snd_seq_port_info_set_timestamp_real(pip, 1);
snd_seq_port_info_set_timestamp_queue(pip, p->alsa_queue);
// create the client port
if((p->alsa_addr.port = snd_seq_create_port(p->h,pip)) < 0 )
{
rc = _cmMpErrMsg(&p->err,kSysErrMpRC,p->alsa_addr.port,"ALSA client port creation failed.");
goto errLabel;
}
p->devCnt = 0;
// determine the count of devices
snd_seq_client_info_set_client(cip, -1);
while( snd_seq_query_next_client(p->h,cip) == 0)
p->devCnt += 1;
// allocate the device array
p->devArray = cmLhAllocZ(p->lH,cmMpDev_t,p->devCnt);
// fill in each device record
snd_seq_client_info_set_client(cip, -1);
for(i=0; snd_seq_query_next_client(p->h,cip)==0; ++i)
{
assert(i<p->devCnt);
int client = snd_seq_client_info_get_client(cip);
const char* name = snd_seq_client_info_get_name(cip);
// initalize the device record
p->devArray[i].nameStr = cmLhAllocStr(p->lH,cmStringNullGuard(name));
p->devArray[i].iPortCnt = 0;
p->devArray[i].oPortCnt = 0;
p->devArray[i].iPortArray = NULL;
p->devArray[i].oPortArray = NULL;
p->devArray[i].clientId = client;
snd_seq_port_info_set_client(pip,client);
snd_seq_port_info_set_port(pip,-1);
// determine the count of in/out ports on this device
while( snd_seq_query_next_port(p->h,pip) == 0 )
{
unsigned caps = snd_seq_port_info_get_capability(pip);
if( cmIsFlag(caps,SND_SEQ_PORT_CAP_READ) )
p->devArray[i].iPortCnt += 1;
if( cmIsFlag(caps,SND_SEQ_PORT_CAP_WRITE) )
p->devArray[i].oPortCnt += 1;
}
// allocate the device port arrays
if( p->devArray[i].iPortCnt > 0 )
p->devArray[i].iPortArray = cmLhAllocZ(p->lH,cmMpPort_t,p->devArray[i].iPortCnt);
if( p->devArray[i].oPortCnt > 0 )
p->devArray[i].oPortArray = cmLhAllocZ(p->lH,cmMpPort_t,p->devArray[i].oPortCnt);
snd_seq_port_info_set_client(pip,client); // set the ports client id
snd_seq_port_info_set_port(pip,-1);
// fill in the port information
for(j=0,k=0; snd_seq_query_next_port(p->h,pip) == 0; )
{
const char* port = snd_seq_port_info_get_name(pip);
unsigned type = snd_seq_port_info_get_type(pip);
unsigned caps = snd_seq_port_info_get_capability(pip);
snd_seq_addr_t addr = *snd_seq_port_info_get_addr(pip);
if( cmIsFlag(caps,SND_SEQ_PORT_CAP_READ) )
{
assert(j<p->devArray[i].iPortCnt);
p->devArray[i].iPortArray[j].inputFl = true;
p->devArray[i].iPortArray[j].nameStr = cmLhAllocStr(p->lH,cmStringNullGuard(port));
p->devArray[i].iPortArray[j].alsa_type = type;
p->devArray[i].iPortArray[j].alsa_cap = caps;
p->devArray[i].iPortArray[j].alsa_addr = addr;
p->devArray[i].iPortArray[j].parserH = cmMpParserCreate(i, j, cbFunc, cbDataPtr, parserBufByteCnt, rpt );
// port->app
snd_seq_port_subscribe_set_sender(subs, &addr);
snd_seq_port_subscribe_set_dest(subs, &p->alsa_addr);
snd_seq_port_subscribe_set_queue(subs, 1);
snd_seq_port_subscribe_set_time_update(subs, 1);
snd_seq_port_subscribe_set_time_real(subs, 1);
if((arc = snd_seq_subscribe_port(p->h, subs)) < 0)
rc = _cmMpErrMsg(&p->err,kSysErrMpRC,arc,"Input port to app. subscription failed on port '%s'.",cmStringNullGuard(port));
++j;
}
if( cmIsFlag(caps,SND_SEQ_PORT_CAP_WRITE) )
{
assert(k<p->devArray[i].oPortCnt);
p->devArray[i].oPortArray[k].inputFl = false;
p->devArray[i].oPortArray[k].nameStr = cmLhAllocStr(p->lH,cmStringNullGuard(port));
p->devArray[i].oPortArray[k].alsa_type = type;
p->devArray[i].oPortArray[k].alsa_cap = caps;
p->devArray[i].oPortArray[k].alsa_addr = addr;
// app->port connection
snd_seq_port_subscribe_set_sender(subs, &p->alsa_addr);
snd_seq_port_subscribe_set_dest( subs, &addr);
if((arc = snd_seq_subscribe_port(p->h, subs)) < 0 )
rc = _cmMpErrMsg(&p->err,kSysErrMpRC,arc,"App to output port subscription failed on port '%s'.",cmStringNullGuard(port));
++k;
}
}
}
errLabel:
if( pip != NULL)
snd_seq_port_info_free(pip);
if( cip != NULL )
snd_seq_client_info_free(cip);
return rc;
}
cmMpRC_t cmMpInitialize( cmCtx_t* ctx, cmMpCallback_t cbFunc, void* cbArg, unsigned parserBufByteCnt, const char* appNameStr )
{
cmMpRC_t rc = kOkMpRC;
int arc = 0;
cmMpRoot_t* p = NULL;
if((rc = cmMpFinalize()) != kOkMpRC )
return rc;
// allocate the global root object
_cmMpRoot = p = cmMemAllocZ(cmMpRoot_t,1);
p->h = NULL;
p->alsa_queue = -1;
cmErrSetup(&p->err,&ctx->rpt,"MIDI Port");
// setup the local linked heap manager
if(cmLHeapIsValid(p->lH = cmLHeapCreate(2048,ctx)) == false )
{
rc = _cmMpErrMsg(&p->err,kLHeapErrMpRC,0,"Linked heap initialization failed.");
goto errLabel;
}
// create the listening thread
if( cmThreadCreate( &p->thH, _cmMpThreadFunc, NULL, &ctx->rpt) != kOkThRC )
{
rc = _cmMpErrMsg(&p->err,kThreadErrMpRC,0,"Thread initialization failed.");
goto errLabel;
}
// initialize the ALSA sequencer
if((arc = snd_seq_open(&p->h, "default", SND_SEQ_OPEN_DUPLEX, SND_SEQ_NONBLOCK )) < 0 )
{
rc = _cmMpErrMsg(&p->err,kSysErrMpRC,arc,"ALSA Sequencer open failed.");
goto errLabel;
}
// setup the device and port structures
if((rc = _cmMpAllocStruct(p,appNameStr,cbFunc,cbArg,parserBufByteCnt,&ctx->rpt)) != kOkMpRC )
goto errLabel;
// allocate the file descriptors used for polling
p->alsa_fdCnt = snd_seq_poll_descriptors_count(p->h, POLLIN);
p->alsa_fd = cmMemAllocZ(struct pollfd,p->alsa_fdCnt);
snd_seq_poll_descriptors(p->h, p->alsa_fd, p->alsa_fdCnt, POLLIN);
p->cbFunc = cbFunc;
p->cbDataPtr = cbArg;
// start the sequencer queue
if((arc = snd_seq_start_queue(p->h, p->alsa_queue, NULL)) < 0 )
{
rc = _cmMpErrMsg(&p->err,kSysErrMpRC,arc,"ALSA queue start failed.");
goto errLabel;
}
// send any pending commands to the driver
snd_seq_drain_output(p->h);
// all time stamps will be an offset from this time stamp
clock_gettime(CLOCK_MONOTONIC,&p->baseTimeStamp);
if( cmThreadPause(p->thH,0) != kOkThRC )
rc = _cmMpErrMsg(&p->err,kThreadErrMpRC,0,"Thread start failed.");
errLabel:
if( rc != kOkMpRC )
cmMpFinalize();
return rc;
}
cmMpRC_t cmMpFinalize()
{
cmMpRC_t rc = kOkMpRC;
cmMpRoot_t* p = _cmMpRoot;
if( _cmMpRoot != NULL )
{
int arc;
// stop the thread first
if( cmThreadDestroy(&p->thH) != kOkThRC )
{
rc = _cmMpErrMsg(&p->err,kThreadErrMpRC,0,"Thread destroy failed.");
goto errLabel;
}
// stop the queue
if( p->h != NULL )
if((arc = snd_seq_stop_queue(p->h,p->alsa_queue, NULL)) < 0 )
{
rc = _cmMpErrMsg(&p->err,kSysErrMpRC,arc,"ALSA queue stop failed.");
goto errLabel;
}
// release the alsa queue
if( p->alsa_queue != -1 )
{
if((arc = snd_seq_free_queue(p->h,p->alsa_queue)) < 0 )
rc = _cmMpErrMsg(&p->err,kSysErrMpRC,arc,"ALSA queue release failed.");
else
p->alsa_queue = -1;
}
// release the alsa system handle
if( p->h != NULL )
{
if( (arc = snd_seq_close(p->h)) < 0 )
rc = _cmMpErrMsg(&p->err,kSysErrMpRC,arc,"ALSA sequencer close failed.");
else
p->h = NULL;
}
// release each parser
unsigned i,j;
for(i=0; i<p->devCnt; ++i)
for(j=0; j<p->devArray[i].iPortCnt; ++j)
cmMpParserDestroy(&p->devArray[i].iPortArray[j].parserH);
cmLHeapDestroy(&p->lH);
cmMemFree(p->alsa_fd);
cmMemPtrFree(&_cmMpRoot);
}
errLabel:
return rc;
}
bool cmMpIsInitialized()
{ return _cmMpRoot!=NULL; }
unsigned cmMpDeviceCount()
{ return _cmMpRoot==NULL ? 0 : _cmMpRoot->devCnt; }
const char* cmMpDeviceName( unsigned devIdx )
{
if( _cmMpRoot==NULL || devIdx>=_cmMpRoot->devCnt)
return NULL;
return _cmMpRoot->devArray[devIdx].nameStr;
}
unsigned cmMpDevicePortCount( unsigned devIdx, unsigned flags )
{
if( _cmMpRoot==NULL || devIdx>=_cmMpRoot->devCnt)
return 0;
if( cmIsFlag(flags,kInMpFl) )
return _cmMpRoot->devArray[devIdx].iPortCnt;
return _cmMpRoot->devArray[devIdx].oPortCnt;
}
const char* cmMpDevicePortName( unsigned devIdx, unsigned flags, unsigned portIdx )
{
if( _cmMpRoot==NULL || devIdx>=_cmMpRoot->devCnt)
return 0;
if( cmIsFlag(flags,kInMpFl) )
{
if( portIdx >= _cmMpRoot->devArray[devIdx].iPortCnt )
return 0;
return _cmMpRoot->devArray[devIdx].iPortArray[portIdx].nameStr;
}
if( portIdx >= _cmMpRoot->devArray[devIdx].oPortCnt )
return 0;
return _cmMpRoot->devArray[devIdx].oPortArray[portIdx].nameStr;
}
cmMpRC_t cmMpDeviceSend( unsigned devIdx, unsigned portIdx, cmMidiByte_t status, cmMidiByte_t d0, cmMidiByte_t d1 )
{
cmMpRC_t rc = kOkMpRC;
snd_seq_event_t ev;
int arc;
cmMpRoot_t* p = _cmMpRoot;
assert( p!=NULL && devIdx < p->devCnt && portIdx < p->devArray[devIdx].oPortCnt );
cmMpPort_t* port = p->devArray[devIdx].oPortArray + portIdx;
snd_seq_ev_clear(&ev);
snd_seq_ev_set_source(&ev, p->alsa_addr.port);
//snd_seq_ev_set_subs(&ev);
snd_seq_ev_set_dest(&ev, port->alsa_addr.client, port->alsa_addr.port);
snd_seq_ev_set_direct(&ev);
snd_seq_ev_set_fixed(&ev);
switch( status & 0xf0 )
{
case kNoteOffMdId:
ev.type = SND_SEQ_EVENT_NOTEOFF;
ev.data.note.note = d0;
ev.data.note.velocity = d1;
break;
case kNoteOnMdId:
ev.type = SND_SEQ_EVENT_NOTEON;
ev.data.note.note = d0;
ev.data.note.velocity = d1;
break;
case kPolyPresMdId:
ev.type = SND_SEQ_EVENT_KEYPRESS ;
ev.data.note.note = d0;
ev.data.note.velocity = d1;
break;
case kCtlMdId:
ev.type = SND_SEQ_EVENT_CONTROLLER;
ev.data.control.param = d0;
ev.data.control.value = d1;
break;
case kPgmMdId:
ev.type = SND_SEQ_EVENT_PGMCHANGE;
ev.data.control.param = d0;
ev.data.control.value = d1;
break;
case kChPresMdId:
ev.type = SND_SEQ_EVENT_CHANPRESS;
ev.data.control.param = d0;
ev.data.control.value = d1;
break;
case kPbendMdId:
{
int val = d0;
val <<= 7;
val += d1;
val -= 8192;
ev.type = SND_SEQ_EVENT_PITCHBEND;
ev.data.control.param = 0;
ev.data.control.value = val;
}
break;
default:
rc = _cmMpErrMsg(&p->err,kInvalidArgMpRC,0,"Cannot send an invalid MIDI status byte:0x%x.",status & 0xf0);
goto errLabel;
}
ev.data.note.channel = status & 0x0f;
if((arc = snd_seq_event_output(p->h, &ev)) < 0 )
rc = _cmMpErrMsg(&p->err,kSysErrMpRC,arc,"MIDI event output failed.");
if((arc = snd_seq_drain_output(p->h)) < 0 )
rc = _cmMpErrMsg(&p->err,kSysErrMpRC,arc,"MIDI event output drain failed.");
errLabel:
return rc;
}
cmMpRC_t cmMpDeviceSendData( unsigned devIdx, unsigned portIdx, const cmMidiByte_t* dataPtr, unsigned byteCnt )
{
cmMpRoot_t* p = _cmMpRoot;
return cmErrMsg(&p->err,kNotImplMpRC,"cmMpDeviceSendData() has not yet been implemented for ALSA.");
}
cmMpRC_t cmMpInstallCallback( unsigned devIdx, unsigned portIdx, cmMpCallback_t cbFunc, void* cbDataPtr )
{
cmMpRC_t rc = kOkMpRC;
unsigned di;
unsigned dn = cmMpDeviceCount();
cmMpRoot_t* p = _cmMpRoot;
for(di=0; di<dn; ++di)
if( di==devIdx || devIdx == -1 )
{
unsigned pi;
unsigned pn = cmMpDevicePortCount(di,kInMpFl);
for(pi=0; pi<pn; ++pi)
if( pi==portIdx || portIdx == -1 )
if( cmMpParserInstallCallback( p->devArray[di].iPortArray[pi].parserH, cbFunc, cbDataPtr ) != kOkMpRC )
goto errLabel;
}
errLabel:
return rc;
}
cmMpRC_t cmMpRemoveCallback( unsigned devIdx, unsigned portIdx, cmMpCallback_t cbFunc, void* cbDataPtr )
{
cmMpRC_t rc = kOkMpRC;
unsigned di;
unsigned dn = cmMpDeviceCount();
unsigned remCnt = 0;
cmMpRoot_t* p = _cmMpRoot;
for(di=0; di<dn; ++di)
if( di==devIdx || devIdx == -1 )
{
unsigned pi;
unsigned pn = cmMpDevicePortCount(di,kInMpFl);
for(pi=0; pi<pn; ++pi)
if( pi==portIdx || portIdx == -1 )
if( cmMpParserHasCallback( p->devArray[di].iPortArray[pi].parserH, cbFunc, cbDataPtr ) )
{
if( cmMpParserRemoveCallback( p->devArray[di].iPortArray[pi].parserH, cbFunc, cbDataPtr ) != kOkMpRC )
goto errLabel;
else
++remCnt;
}
}
if( remCnt == 0 && dn > 0 )
rc = _cmMpErrMsg(&p->err,kCbNotFoundMpRC,0,"The callback was not found on any of the specified devices or ports.");
errLabel:
return rc;
}
bool cmMpUsesCallback( unsigned devIdx, unsigned portIdx, cmMpCallback_t cbFunc, void* cbDataPtr )
{
unsigned di;
unsigned dn = cmMpDeviceCount();
cmMpRoot_t* p = _cmMpRoot;
for(di=0; di<dn; ++di)
if( di==devIdx || devIdx == -1 )
{
unsigned pi;
unsigned pn = cmMpDevicePortCount(di,kInMpFl);
for(pi=0; pi<pn; ++pi)
if( pi==portIdx || portIdx == -1 )
if( cmMpParserHasCallback( p->devArray[di].iPortArray[pi].parserH, cbFunc, cbDataPtr ) )
return true;
}
return false;
}
void _cmMpReportPort( cmRpt_t* rpt, const cmMpPort_t* port )
{
cmRptPrintf(rpt," client:%i port:%i %s caps:(",port->alsa_addr.client,port->alsa_addr.port,port->nameStr);
if( port->alsa_cap & SND_SEQ_PORT_CAP_READ ) cmRptPrintf(rpt,"Read " );
if( port->alsa_cap & SND_SEQ_PORT_CAP_WRITE ) cmRptPrintf(rpt,"Writ " );
if( port->alsa_cap & SND_SEQ_PORT_CAP_SYNC_READ ) cmRptPrintf(rpt,"Syrd " );
if( port->alsa_cap & SND_SEQ_PORT_CAP_SYNC_WRITE ) cmRptPrintf(rpt,"Sywr " );
if( port->alsa_cap & SND_SEQ_PORT_CAP_DUPLEX ) cmRptPrintf(rpt,"Dupl " );
if( port->alsa_cap & SND_SEQ_PORT_CAP_SUBS_READ ) cmRptPrintf(rpt,"Subr " );
if( port->alsa_cap & SND_SEQ_PORT_CAP_SUBS_WRITE ) cmRptPrintf(rpt,"Subw " );
if( port->alsa_cap & SND_SEQ_PORT_CAP_NO_EXPORT ) cmRptPrintf(rpt,"Nexp " );
cmRptPrintf(rpt,") type:(");
if( port->alsa_type & SND_SEQ_PORT_TYPE_SPECIFIC ) cmRptPrintf(rpt,"Spec ");
if( port->alsa_type & SND_SEQ_PORT_TYPE_MIDI_GENERIC) cmRptPrintf(rpt,"Gnrc ");
if( port->alsa_type & SND_SEQ_PORT_TYPE_MIDI_GM ) cmRptPrintf(rpt,"GM ");
if( port->alsa_type & SND_SEQ_PORT_TYPE_MIDI_GS ) cmRptPrintf(rpt,"GS ");
if( port->alsa_type & SND_SEQ_PORT_TYPE_MIDI_XG ) cmRptPrintf(rpt,"XG ");
if( port->alsa_type & SND_SEQ_PORT_TYPE_MIDI_MT32 ) cmRptPrintf(rpt,"MT32 ");
if( port->alsa_type & SND_SEQ_PORT_TYPE_MIDI_GM2 ) cmRptPrintf(rpt,"GM2 ");
if( port->alsa_type & SND_SEQ_PORT_TYPE_SYNTH ) cmRptPrintf(rpt,"Syn ");
if( port->alsa_type & SND_SEQ_PORT_TYPE_DIRECT_SAMPLE) cmRptPrintf(rpt,"Dsmp ");
if( port->alsa_type & SND_SEQ_PORT_TYPE_SAMPLE ) cmRptPrintf(rpt,"Samp ");
if( port->alsa_type & SND_SEQ_PORT_TYPE_HARDWARE ) cmRptPrintf(rpt,"Hwar ");
if( port->alsa_type & SND_SEQ_PORT_TYPE_SOFTWARE ) cmRptPrintf(rpt,"Soft ");
if( port->alsa_type & SND_SEQ_PORT_TYPE_SYNTHESIZER ) cmRptPrintf(rpt,"Sizr ");
if( port->alsa_type & SND_SEQ_PORT_TYPE_PORT ) cmRptPrintf(rpt,"Port ");
if( port->alsa_type & SND_SEQ_PORT_TYPE_APPLICATION ) cmRptPrintf(rpt,"Appl ");
cmRptPrintf(rpt,")\n");
}
void cmMpReport( cmRpt_t* rpt )
{
cmMpRoot_t* p = _cmMpRoot;
unsigned i,j;
cmRptPrintf(rpt,"Buffer size bytes in:%i out:%i\n",snd_seq_get_input_buffer_size(p->h),snd_seq_get_output_buffer_size(p->h));
for(i=0; i<p->devCnt; ++i)
{
const cmMpDev_t* d = p->devArray + i;
cmRptPrintf(rpt,"%i : Device: %s \n",i,cmStringNullGuard(d->nameStr));
if(d->iPortCnt > 0 )
cmRptPrintf(rpt," Input:\n");
for(j=0; j<d->iPortCnt; ++j)
_cmMpReportPort(rpt,d->iPortArray+j);
if(d->oPortCnt > 0 )
cmRptPrintf(rpt," Output:\n");
for(j=0; j<d->oPortCnt; ++j)
_cmMpReportPort(rpt,d->oPortArray+j);
}
}
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