bool midibus::init_out( )
{
/* temp return */
int ret;
/* create ports */
ret = snd_seq_create_simple_port(m_seq,
m_name.c_str(),
SND_SEQ_PORT_CAP_NO_EXPORT |
SND_SEQ_PORT_CAP_READ,
SND_SEQ_PORT_TYPE_MIDI_GENERIC |
SND_SEQ_PORT_TYPE_APPLICATION );
m_local_addr_port = ret;
if ( ret < 0 ){
printf( "snd_seq_create_simple_port(write) error\n");
return false;
}
/* connect to */
ret = snd_seq_connect_to( m_seq,
m_local_addr_port,
m_dest_addr_client,
m_dest_addr_port );
if ( ret < 0 ){
printf( "snd_seq_connect_to(%d:%d) error\n", m_dest_addr_client, m_dest_addr_port);
return false;
}
return true;
}
bool QMidi::initMidiOut(QString outDeviceId)
{
#if defined(Q_OS_WIN)
midiOutOpen(&midiOutPtr,outDeviceId.toInt(),0,0,CALLBACK_NULL);
#elif defined(Q_OS_LINUX)
int err = snd_seq_open(&midiOutPtr, "default", SND_SEQ_OPEN_OUTPUT, 0);
if(err < 0) { return false; }
snd_seq_set_client_name(midiOutPtr, "QtMidi");
snd_seq_create_simple_port(midiOutPtr, "Output Port",
SND_SEQ_PORT_CAP_READ, SND_SEQ_PORT_TYPE_MIDI_GENERIC);
QStringList l = outDeviceId.split(":");
int client = l.at(0).toInt();
int port = l.at(1).toInt();
snd_seq_connect_to(midiOutPtr, 0, client, port);
#elif defined(Q_OS_HAIKU)
midiOutConsumer = BMidiRoster::FindConsumer(outDeviceId.toInt());
if(midiOutConsumer == NULL) { return false; }
midiOutLocProd = new BMidiLocalProducer("QtMidi");
if(!midiOutLocProd->IsValid()) { midiOutLocProd->Release(); return false; } // some error ??
midiOutLocProd->Register();
if(midiOutLocProd->Connect(midiOutConsumer) != B_OK) { return false; }
#endif
myOutDeviceId = outDeviceId;
return true;
}
void JVlibForm::connect_port() {
if (seq && strlen(SEQ_dev)) {
// create_source_port
snd_seq_port_info_t *pinfo;
snd_seq_port_info_alloca(&pinfo);
// the first created port is 0 anyway, but let's make sure ...
snd_seq_port_info_set_port(pinfo, 0);
snd_seq_port_info_set_port_specified(pinfo, 1);
snd_seq_port_info_set_name(pinfo, "midi_player");
snd_seq_port_info_set_capability(pinfo, 0);
snd_seq_port_info_set_type(pinfo,
SND_SEQ_PORT_TYPE_MIDI_GENERIC |
SND_SEQ_PORT_TYPE_APPLICATION);
int err = snd_seq_create_port(seq, pinfo);
check_snd("create port", err);
ports = (snd_seq_addr_t *)realloc(ports, sizeof(snd_seq_addr_t));
err = snd_seq_parse_address(seq, &ports[0], SEQ_dev);
if (err < 0) {
QMessageBox::critical(this, "MIDI Player", QString("Invalid port%1\n%2") .arg(SEQ_dev) .arg(snd_strerror(err)));
return;
}
err = snd_seq_connect_to(seq, 0, ports[0].client, ports[0].port);
if (err < 0 && err!= -16)
QMessageBox::critical(this, "MIDI Player", QString("%4 Cannot connect to port %1:%2 - %3") .arg(ports[0].client) .arg(ports[0].port) .arg(strerror(errno)) .arg(err));
}
} // end connect_port
void stop_midireceiver (JackVST *jvst)
{
int err;
snd_seq_event_t event;
snd_seq_t *seq2 = create_sequencer ("jfstquit", true);
jvst->midiquit = 1;
snd_seq_connect_to (seq2, 0, snd_seq_client_id (jvst->seq),0);
snd_seq_ev_clear (&event);
snd_seq_ev_set_direct (&event);
snd_seq_ev_set_subs (&event);
snd_seq_ev_set_source (&event, 0);
snd_seq_ev_set_controller (&event,1,0x80,50);
if ((err = snd_seq_event_output (seq2, &event)) < 0) {
fst_error ("cannot send stop event to midi thread: %s\n",
snd_strerror (err));
}
snd_seq_drain_output (seq2);
snd_seq_close (seq2);
pthread_join (jvst->midi_thread,NULL);
snd_seq_close (jvst->seq);
}
int seq_open() {
unsigned int caps;
if (!seq_opened) {
/* sequencer opening */
if (snd_seq_open(&seq_handle, "hw", SND_SEQ_OPEN_OUTPUT, 0)) {
fprintf(stderr, "Error opening ALSA sequencer.\n");
return(-1);
}
/* our client id */
my_client = snd_seq_client_id(seq_handle);
/* set client info */
snd_seq_set_client_name(seq_handle, DEFAULT_NAME);
/* create port */
caps = SND_SEQ_PORT_CAP_READ;
if (seq_client == SND_SEQ_ADDRESS_SUBSCRIBERS)
caps |= SND_SEQ_PORT_CAP_SUBS_READ;
my_port = snd_seq_create_simple_port(seq_handle, DEFAULT_NAME, caps,SND_SEQ_PORT_TYPE_MIDI_GENERIC | SND_SEQ_PORT_TYPE_APPLICATION);
if (my_port < 0) {
fprintf(stderr, "can't create port\n");
snd_seq_close(seq_handle);
return 0;
}
/* subscribe to MIDI port */
if (seq_client != SND_SEQ_ADDRESS_SUBSCRIBERS) {
if (snd_seq_connect_to(seq_handle, my_port, seq_client, seq_port) < 0) {
fprintf(stderr, "can't subscribe to MIDI port (%d:%d)\n", seq_client, seq_port);
snd_seq_close(seq_handle);
return 0;
}
}
}
seq_opened = 1;
return 1;
}
int ALSAMidiDriver::open() {
std::string arg;
unsigned int caps;
if (isOpen)
return -1;
arg = getConfigSetting("alsa_port", ALSA_PORT);
if (parse_addr(arg, &seq_client, &seq_port) < 0) {
perr << "ALSAMidiDriver: Invalid port: " << arg << std::endl;
return -1;
}
if (my_snd_seq_open(&seq_handle)) {
perr << "ALSAMidiDriver: Can't open sequencer" << std::endl;
return -1;
}
isOpen = true;
my_client = snd_seq_client_id(seq_handle);
snd_seq_set_client_name(seq_handle, "PENTAGRAM");
snd_seq_set_client_group(seq_handle, "input");
caps = SND_SEQ_PORT_CAP_READ;
if (seq_client == SND_SEQ_ADDRESS_SUBSCRIBERS)
caps = ~SND_SEQ_PORT_CAP_SUBS_READ;
my_port =
snd_seq_create_simple_port(seq_handle, "PENTAGRAM", caps,
SND_SEQ_PORT_TYPE_MIDI_GENERIC | SND_SEQ_PORT_TYPE_APPLICATION);
if (my_port < 0) {
snd_seq_close(seq_handle);
isOpen = false;
perr << "ALSAMidiDriver: Can't create port" << std::endl;
return -1;
}
if (seq_client != SND_SEQ_ADDRESS_SUBSCRIBERS) {
/* subscribe to MIDI port */
if (snd_seq_connect_to(seq_handle, my_port, seq_client, seq_port) < 0) {
snd_seq_close(seq_handle);
isOpen = false;
perr << "ALSAMidiDriver: "
<< "Can't subscribe to MIDI port (" << seq_client
<< ":" << seq_port << ")" << std::endl;
return -1;
}
}
pout << "ALSA client initialised [" << seq_client << ":"
<< seq_port << "]" << std::endl;
return 0;
}
static PyObject *
alsaseq_connectto(PyObject *self, PyObject *args)
{
int myport, dest_client, dest_port;
if (!PyArg_ParseTuple(args, "iii", &myport, &dest_client, &dest_port ))
return NULL;
snd_seq_connect_to( seq_handle, myport, dest_client, dest_port);
Py_INCREF(Py_None);
return Py_None;
}
int bx_sound_linux_c::alsa_seq_open(const char *alsadev)
{
char *mididev, *ptr;
int client, port, ret = 0;
int length = strlen(alsadev) + 1;
mididev = new char[length];
if (mididev == NULL)
return BX_SOUNDLOW_ERR;
strcpy(mididev, alsadev);
ptr = strtok(mididev, ":");
if (ptr == NULL) {
BX_ERROR(("ALSA sequencer setup: missing client parameters"));
return BX_SOUNDLOW_ERR;
}
client = atoi(ptr);
ptr = strtok(NULL, ":");
if (ptr == NULL) {
BX_ERROR(("ALSA sequencer setup: missing port parameter"));
return BX_SOUNDLOW_ERR;
}
port = atoi(ptr);
delete(mididev);
if (snd_seq_open(&alsa_seq.handle, "default", SND_SEQ_OPEN_OUTPUT, 0) < 0) {
BX_ERROR(("Couldn't open ALSA sequencer for midi output"));
return BX_SOUNDLOW_ERR;
}
ret = snd_seq_create_simple_port(alsa_seq.handle, NULL,
SND_SEQ_PORT_CAP_WRITE |
SND_SEQ_PORT_CAP_SUBS_WRITE |
SND_SEQ_PORT_CAP_READ,
SND_SEQ_PORT_TYPE_MIDI_GENERIC);
if (ret < 0) {
BX_ERROR(("ALSA sequencer: error creating port %s", snd_strerror(errno)));
} else {
alsa_seq.source_port = ret;
ret = snd_seq_connect_to(alsa_seq.handle, alsa_seq.source_port, client, port);
if (ret < 0) {
BX_ERROR(("ALSA sequencer: could not connect to port %d:%d", client, port));
}
}
if (ret < 0) {
snd_seq_close(alsa_seq.handle);
return BX_SOUNDLOW_ERR;
} else {
return BX_SOUNDLOW_OK;
}
}
int ALSADrv_MIDI_Init(midifuncs *funcs)
{
int result;
ALSADrv_MIDI_Shutdown();
memset(funcs, 0, sizeof(midifuncs));
result = snd_seq_open(&seq, "default", SND_SEQ_OPEN_DUPLEX, 0);
if (result < 0) {
fprintf(stderr, "ALSA snd_seq_open err %d\n", result);
ErrorCode = ALSAErr_SeqOpen;
return ALSAErr_Error;
}
seq_port = snd_seq_create_simple_port(seq, "output",
SND_SEQ_PORT_CAP_READ | SND_SEQ_PORT_CAP_WRITE,
SND_SEQ_PORT_TYPE_APPLICATION);
if (seq_port < 0) {
ALSADrv_MIDI_Shutdown();
fprintf(stderr, "ALSA snd_seq_create_simple_port err %d\n", seq_port);
ErrorCode = ALSAErr_CreateSimplePort;
return ALSAErr_Error;
}
snd_seq_set_client_name(seq, "JFAudioLib application");
seq_queue = snd_seq_alloc_queue(seq);
if (seq_queue < 0) {
ALSADrv_MIDI_Shutdown();
fprintf(stderr, "ALSA snd_seq_alloc_queue err %d\n", seq_queue);
ErrorCode = ALSAErr_AllocQueue;
return ALSAErr_Error;
}
result = snd_seq_connect_to(seq, seq_port, 128, 0);
if (result < 0) {
ALSADrv_MIDI_Shutdown();
fprintf(stderr, "ALSA snd_seq_connect_to err %d\n", result);
ErrorCode = ALSAErr_ConnectTo;
return ALSAErr_Error;
}
funcs->NoteOff = Func_NoteOff;
funcs->NoteOn = Func_NoteOn;
funcs->PolyAftertouch = Func_PolyAftertouch;
funcs->ControlChange = Func_ControlChange;
funcs->ProgramChange = Func_ProgramChange;
funcs->ChannelAftertouch = Func_ChannelAftertouch;
funcs->PitchBend = Func_PitchBend;
return ALSAErr_Ok;
}
static void
midi_connect_sequencer() {
int err;
err = snd_seq_open(&midi_sequencer, "default", SND_SEQ_OPEN_OUTPUT, 0);
assert (err >= 0);
snd_seq_set_client_name(midi_sequencer, "midimatch");
snd_seq_create_simple_port(midi_sequencer, "matched midi data",
SND_SEQ_PORT_CAP_READ|SND_SEQ_PORT_CAP_SUBS_READ,
SND_SEQ_PORT_TYPE_MIDI_GENERIC);
snd_seq_connect_to(midi_sequencer, 0, 128, 0);
}
static PyObject *
alsaseq_connectto(PyObject *self, PyObject *args)
{
int myport, dest_client, dest_port;
if (!PyArg_ParseTuple(args, "iii", &myport, &dest_client, &dest_port ))
return NULL;
if (!seq_handle) {
PyErr_SetString(PyExc_RuntimeError, "Must initialize module with alsaseq.client() before using it");
return NULL;
}
snd_seq_connect_to( seq_handle, myport, dest_client, dest_port);
Py_INCREF(Py_None);
return Py_None;
}
rimshot_alsa_output_t *
rimshot_alsa_output_open (const char *name, int client, int port)
{
snd_seq_t *seq;
rimshot_alsa_output_t *alsa;
if (snd_seq_open (&seq, "default", SND_SEQ_OPEN_OUTPUT, 0) < 0) {
return NULL;
}
snd_seq_set_client_name (seq, "drumkit");
alsa = (rimshot_alsa_output_t *)calloc (1, sizeof (rimshot_alsa_output_t));
alsa->seq = seq;
alsa->port = snd_seq_create_simple_port (seq, "drumkit output",
SND_SEQ_PORT_CAP_READ | SND_SEQ_PORT_CAP_SUBS_READ,
SND_SEQ_PORT_TYPE_APPLICATION);
snd_seq_connect_to (seq, alsa->port, client, port);
return alsa;
}
int SeqContext::seq_connect_add( char *clientport )
{
int ret;
snd_seq_addr_t *addr;
addr = parseclientport( clientport );
if( verbose )
fprintf(stderr,"Adding clientport = %s; ", clientport);
destlist->append( addr );
ret = snd_seq_connect_to(handle, source.port, addr->client, addr->port);
if( ret < 0 )
fprintf(stderr,"Error connecting to client at %d:%d\n", addr->client, addr->port);
else
if( verbose )
fprintf(stderr,"connected to client %d:%d\n", addr->client, addr->port);
return ret;
}
static PyObject *setup(PyObject *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, "i", &dest_client_id))
return NULL;
// open client
err = snd_seq_open(&seq, "default", SND_SEQ_OPEN_DUPLEX, 0);
if (err < 0)
RAISE("couldnt open sequencer connection\n");
// get client id
my_client_id = snd_seq_client_id(seq);
// create readable port for sending events
readable_port = snd_seq_create_simple_port(
seq, "my readable port",
SND_SEQ_PORT_CAP_READ | SND_SEQ_PORT_CAP_SUBS_READ,
SND_SEQ_PORT_TYPE_MIDI_GENERIC);
// create writable port for receiving events
writable_port = snd_seq_create_simple_port(
seq, "my writable port",
SND_SEQ_PORT_CAP_WRITE | SND_SEQ_PORT_CAP_SUBS_WRITE,
SND_SEQ_PORT_TYPE_MIDI_GENERIC);
// make subscription for sending events to device
if (snd_seq_connect_to(seq, readable_port, dest_client_id, 0) < 0)
RAISE("Unable to subscribe to MIDI port for writing.\n");
// make subscription for capturing events from midi device
if (snd_seq_connect_from(seq, writable_port, dest_client_id, 0) < 0)
RAISE("Unable to subscribe to MIDI port for reading.\n");
Py_INCREF(Py_None);
return Py_None;
}
static void stop_midireceiver(struct Data *data){
int err;
snd_seq_event_t event;
snd_seq_t *seq2=create_alsa_seq("alsagakkquit",true);
data->toquit=true;
snd_seq_connect_to(seq2,0,snd_seq_client_id(data->seq),0);
snd_seq_ev_clear (&event);
snd_seq_ev_set_direct (&event);
snd_seq_ev_set_subs (&event);
snd_seq_ev_set_source (&event, 0);
snd_seq_ev_set_controller (&event,1,0x80,50);
err = snd_seq_event_output (seq2, &event);
if (err < 0){
fprintf (stderr, "jackvst: %s: error sending midi event: %s\n",
__FUNCTION__, snd_strerror (err));
}
snd_seq_drain_output (seq2);
snd_seq_close(seq2);
pthread_join(data->midithread,NULL);
snd_seq_close(data->seq);
}
// A lot easier:
void subscribe_output(snd_seq_t *seq, int client, int port)
{
snd_seq_connect_to(seq, 9, client, port);
}
static
port_t* port_create(alsa_seqmidi_t *self, int type, snd_seq_addr_t addr, const snd_seq_port_info_t *info)
{
snd_seq_client_info_t* client_info;
port_t *port;
char *c;
int err;
int jack_caps;
char name[128];
port = calloc(1, sizeof(port_t));
if (!port)
return NULL;
port->remote = addr;
snd_seq_client_info_alloca (&client_info);
snd_seq_get_any_client_info (self->seq, addr.client, client_info);
snprintf(port->name, sizeof(port->name), "alsa_pcm:%s/midi_%s_%d",
snd_seq_client_info_get_name(client_info), port_type[type].name, addr.port+1);
// replace all offending characters by -
for (c = port->name; *c; ++c)
if (!isalnum(*c) && *c != '/' && *c != '_' && *c != ':' && *c != '(' && *c != ')')
*c = '-';
jack_caps = port_type[type].jack_caps;
/* mark anything that looks like a hardware port as physical&terminal */
if (snd_seq_port_info_get_type (info) & (SND_SEQ_PORT_TYPE_HARDWARE|SND_SEQ_PORT_TYPE_PORT|SND_SEQ_PORT_TYPE_SPECIFIC)) {
jack_caps |= (JackPortIsPhysical | JackPortIsTerminal);
}
if (jack_caps & JackPortIsOutput)
snprintf(name, sizeof(name), "system:midi_capture_%d", ++self->midi_in_cnt);
else
snprintf(name, sizeof(name), "system:midi_playback_%d", ++self->midi_out_cnt);
port->jack_port = jack_port_register(self->jack,
name, JACK_DEFAULT_MIDI_TYPE, jack_caps, 0);
if (!port->jack_port)
goto failed;
jack_port_set_alias (port->jack_port, port->name);
/* generate an alias */
snprintf(port->name, sizeof(port->name), "%s:midi/%s_%d",
snd_seq_client_info_get_name (client_info), port_type[type].name, addr.port+1);
// replace all offending characters by -
for (c = port->name; *c; ++c)
if (!isalnum(*c) && *c != '/' && *c != '_' && *c != ':' && *c != '(' && *c != ')')
*c = '-';
jack_port_set_alias (port->jack_port, port->name);
if (type == PORT_INPUT)
err = alsa_connect_from(self, port->remote.client, port->remote.port);
else
err = snd_seq_connect_to(self->seq, self->port_id, port->remote.client, port->remote.port);
if (err)
goto failed;
port->early_events = jack_ringbuffer_create(MAX_EVENT_SIZE*16);
info_log("port created: %s", port->name);
return port;
failed:
port_free(self, port);
return NULL;
}
/** main
*
*/
int
main ( int argc, char **argv )
{
int keys = 0;
int mc_offset = 0;
snd_seq_event_t ev;
int patch = 0;
int bank = 0;
fprintf( stderr, "lsmi-keyhack" " v" VERSION "\n" );
get_args( argc, argv );
fprintf( stderr, "Registering MIDI port...\n" );
seq = open_client( CLIENT_NAME );
if ( NULL == seq )
{
fprintf( stderr, "Error opening alsa sequencer!\n" );
exit( 1 );
}
if ( ( port = open_output_port( seq ) ) < 0 )
{
fprintf( stderr, "Error opening MIDI output port!\n" );
exit( 1 );
}
if ( sub_name )
{
snd_seq_addr_t addr;
if ( snd_seq_parse_address( seq, &addr, sub_name ) < 0 )
fprintf( stderr, "Couldn't parse address '%s'", sub_name );
else if ( snd_seq_connect_to( seq, port, addr.client, addr.port ) <
0 )
{
fprintf( stderr, "Error creating subscription for port %i:%i",
addr.client, addr.port );
exit( 1 );
}
}
fprintf( stderr, "Initializing keyboard...\n" );
if ( -1 == ( fd = open( device, O_RDWR ) ) )
{
fprintf( stderr, "Error opening event interface! (%s)\n",
strerror( errno ) );
exit( 1 );
}
init_keyboard();
set_traps();
update_leds();
fprintf( stderr, "Opening database...\n" );
if ( database == defaultdatabase )
{
char *home = getenv( "HOME" );
database = malloc( strlen( home ) + strlen( defaultdatabase ) + 2 );
sprintf( database, "%s/%s", home, defaultdatabase );
}
if ( -1 == open_database( database ) )
{
fprintf( stderr, "******Key database missing or invalid******\n"
"Entering learning mode...\n"
"Make sure your \"keyboard\" device is connected!\n" );
learn_mode();
}
analyze_map( &keys, &mc_offset );
octave_min = ( mc_offset / 12 ) + 1;
octave_max = 9 - ( ( keys - mc_offset ) / 12 );
fprintf( stderr,
"%i keys, middle C is %ith from the left, lowest MIDI octave == %i, highest, %i\n",
keys, mc_offset + 1, octave_min, octave_max );
fprintf( stderr, "Waiting for events...\n" );
for ( ;; )
{
int keyi, newstate;
keyi = get_keypress( &newstate );
snd_seq_ev_clear( &ev );
if ( map[keyi].control )
{
snd_seq_event_t e;
if ( newstate == UP )
continue;
switch ( map[keyi].control )
{
/* All notes off */
snd_seq_ev_set_controller( &ev, channel, 123, 0 );
send_event( &ev );
snd_seq_ev_clear( &ev );
case CKEY_EXIT:
fprintf( stderr, "Exiting...\n" );
if ( close_database( database ) < 0 )
fprintf( stderr, "Error saving database!\n" );
clean_up();
exit( 0 );
case CKEY_MODE:
prog_mode =
prog_mode + 1 >
NUM_PROG_MODES - 1 ? 0 : prog_mode + 1;
fprintf( stderr, "Input mode change to %s\n",
mode_names[prog_mode] );
update_leds();
break;
case CKEY_OCTAVE_DOWN:
octave = min( octave - 1, octave_min );
break;
case CKEY_OCTAVE_UP:
octave = max( octave + 1, octave_max );
break;
case CKEY_CHANNEL_DOWN:
channel = min( channel - 1, 0 );
break;
case CKEY_CHANNEL_UP:
channel = max( channel + 1, 15 );
break;
case CKEY_PATCH_DOWN:
if ( patch == 0 && bank > 0 )
{
bank = min( bank - 1, 0 );
patch = 127;
snd_seq_ev_set_controller( &e, channel, 0, bank );
send_event( &e );
}
else
patch = min( patch - 1, 0 );
snd_seq_ev_set_pgmchange( &ev, channel, patch );
break;
case CKEY_PATCH_UP:
if ( patch == 127 && bank < 127 )
{
bank = max( bank + 1, 127 );
patch = 0;
snd_seq_ev_set_controller( &e, channel, 0, bank );
send_event( &e );
}
else
patch = max( patch + 1, 127 );
snd_seq_ev_set_pgmchange( &ev, channel, patch );
break;
case CKEY_NUMERIC:
{
struct timeval tv;
gettimeofday( &tv, NULL );
/* Timeout in 5 secs */
if ( tv.tv_sec - timeout.tv_sec >= 5 )
{
prog_index = 0;
}
timeout = tv;
if ( prog_index == 0 )
printf( "INPUT %s #: ", mode_names[prog_mode] );
}
prog_buf[prog_index++] = 48 + map[keyi].number;
printf( "%i", map[keyi].number );
fflush( stdout );
if ( prog_index == 2 && prog_mode == CHANNEL )
{
/* FIXME: all notes off->channel */
prog_buf[++prog_index] = '\0';
channel = atoi( prog_buf );
channel = max( channel, 15 );
prog_index = 0;
printf( " ENTER\n" );
}
else if ( prog_index == 3 )
{
prog_buf[++prog_index] = '\0';
switch ( prog_mode )
{
case PATCH:
patch = atoi( prog_buf );
patch = max( patch, 127 );
snd_seq_ev_set_pgmchange( &ev, channel,
patch );
break;
case BANK:
bank = atoi( prog_buf );
bank = max( bank, 127 );
snd_seq_ev_set_controller( &ev, channel, 0,
bank );
break;
default:
fprintf( stderr, "Internal error!\n" );
}
prog_index = 0;
printf( " ENTER\n" );
}
break;
default:
fprintf( stderr, "Internal error!\n" );
}
send_event( &ev );
continue;
}
else
switch ( map[keyi].ev_type )
{
case SND_SEQ_EVENT_CONTROLLER:
snd_seq_ev_set_controller( &ev, channel,
map[keyi].number,
newstate == DOWN ? 127 : 0 );
break;
case SND_SEQ_EVENT_NOTE:
if ( newstate == DOWN )
snd_seq_ev_set_noteon( &ev, channel,
map[keyi].number +
( 12 * octave ), 64 );
else
snd_seq_ev_set_noteoff( &ev, channel,
map[keyi].number +
( 12 * octave ), 64 );
break;
default:
fprintf( stderr, "Key has invalid mapping!\n" );
break;
}
send_event( &ev );
}
}
/**************************************************************************
* modOpen [internal]
*/
static DWORD modOpen(WORD wDevID, LPMIDIOPENDESC lpDesc, DWORD dwFlags)
{
TRACE("(%04X, %p, %08lX);\n", wDevID, lpDesc, dwFlags);
if (lpDesc == NULL) {
WARN("Invalid Parameter !\n");
return MMSYSERR_INVALPARAM;
}
if (wDevID >= MODM_NumDevs) {
TRACE("MAX_MIDIOUTDRV reached !\n");
return MMSYSERR_BADDEVICEID;
}
if (MidiOutDev[wDevID].midiDesc.hMidi != 0) {
WARN("device already open !\n");
return MMSYSERR_ALLOCATED;
}
if (!MidiOutDev[wDevID].bEnabled) {
WARN("device disabled !\n");
return MIDIERR_NODEVICE;
}
if ((dwFlags & ~CALLBACK_TYPEMASK) != 0) {
WARN("bad dwFlags\n");
return MMSYSERR_INVALFLAG;
}
if (!MidiOutDev[wDevID].bEnabled) {
TRACE("disabled wDevID\n");
return MMSYSERR_NOTENABLED;
}
MidiOutDev[wDevID].lpExtra = 0;
switch (MidiOutDev[wDevID].caps.wTechnology) {
case MOD_FMSYNTH:
case MOD_MIDIPORT:
case MOD_SYNTH:
if (midiOpenSeq(1) < 0) {
return MMSYSERR_ALLOCATED;
}
break;
default:
WARN("Technology not supported (yet) %d !\n",
MidiOutDev[wDevID].caps.wTechnology);
return MMSYSERR_NOTENABLED;
}
MidiOutDev[wDevID].wFlags = HIWORD(dwFlags & CALLBACK_TYPEMASK);
MidiOutDev[wDevID].lpQueueHdr = NULL;
MidiOutDev[wDevID].dwTotalPlayed = 0;
MidiOutDev[wDevID].bufsize = 0x3FFF;
MidiOutDev[wDevID].midiDesc = *lpDesc;
/* Connect our app port to the device port */
if (snd_seq_connect_to(midiSeq, port_out, MidiOutDev[wDevID].addr.client, MidiOutDev[wDevID].addr.port) < 0)
return MMSYSERR_NOTENABLED;
if (MIDI_NotifyClient(wDevID, MOM_OPEN, 0L, 0L) != MMSYSERR_NOERROR) {
WARN("can't notify client !\n");
return MMSYSERR_INVALPARAM;
}
TRACE("Successful !\n");
return MMSYSERR_NOERROR;
}
int main(int argc, char **argv)
{
int i;
int listen_port = -1;
char *client_name = "net2alsamidi";
char *connect_client = NULL;
int connect_port = -1;
for (i = 1; i < argc; i++)
{
if (strcmp(argv[i], "--port") == 0)
{
if (++i == argc) usage(argv[0]);
listen_port = atoi(argv[i]);
}
else if (strcmp(argv[i], "--name") == 0)
{
if (++i == argc) usage(argv[0]);
client_name = argv[i];
}
else if (strcmp(argv[i], "--connect") == 0)
{
if (++i == argc) usage(argv[0]);
connect_client = argv[i];
if (++i == argc) usage(argv[0]);
connect_port = atoi(argv[i]);
}
else
{
usage(argv[0]);
}
}
if (listen_port > 0)
{
snd_seq_t *seq;
int port;
if (snd_seq_open(&seq, "default", SND_SEQ_OPEN_OUTPUT, 0) < 0)
{
fprintf(stderr, "Cannot open the ALSA sequencer.\n");
exit(1);
}
snd_seq_set_client_name(seq, client_name);
port = snd_seq_create_simple_port(seq, "from NetMIDI client", SND_SEQ_PORT_CAP_READ | SND_SEQ_PORT_CAP_SUBS_READ, SND_SEQ_PORT_TYPE_MIDI_GENERIC | SND_SEQ_PORT_TYPE_APPLICATION);
if ((connect_client != NULL) && (connect_port >= 0))
{
int connect_client_id = -1;
{
snd_seq_client_info_t *client_info;
snd_seq_client_info_malloc(&client_info);
while (snd_seq_query_next_client(seq, client_info) == 0)
{
if (strcmp(snd_seq_client_info_get_name(client_info), connect_client) == 0)
{
connect_client_id = snd_seq_client_info_get_client(client_info);
break;
}
}
snd_seq_client_info_free(client_info);
}
if (connect_client_id < 0) connect_client_id = atoi(connect_client);
snd_seq_connect_to(seq, port, connect_client_id, connect_port);
}
{
int server_socket;
struct sockaddr_in server_address;
if ((server_socket = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
fprintf(stderr, "Cannot start a NetMIDI server on port %d.\n", listen_port);
exit(1);
}
server_address.sin_family = AF_INET;
server_address.sin_port = htons(listen_port);
server_address.sin_addr.s_addr = INADDR_ANY;
if (bind(server_socket, (struct sockaddr *)(&server_address), sizeof(server_address)) < 0)
{
fprintf(stderr, "Cannot start a NetMIDI server on port %d.\n", listen_port);
exit(1);
}
if (listen(server_socket, 1) < 0)
{
fprintf(stderr, "Cannot start a NetMIDI server on port %d.\n", listen_port);
exit(1);
}
while (1)
{
int socket_to_client;
if ((socket_to_client = accept(server_socket, NULL, NULL)) >= 0)
{
snd_midi_event_t *midi_event_parser;
snd_seq_event_t *event;
unsigned char buffer[BUFFER_SIZE];
int bytes_read;
{
char one = 1;
setsockopt(socket_to_client, IPPROTO_TCP, TCP_NODELAY, &one, sizeof(one));
}
snd_midi_event_new(BUFFER_SIZE, &midi_event_parser);
while ((bytes_read = recv(socket_to_client, buffer, BUFFER_SIZE, 0)) > 0)
{
for (i = 0; i < bytes_read; i++)
{
if (snd_midi_event_encode_byte(midi_event_parser, buffer[i], event) == 1)
{
snd_seq_event_output_direct(seq, event);
}
}
}
snd_midi_event_free(midi_event_parser);
close(socket_to_client);
}
}
close(server_socket);
}
snd_seq_delete_simple_port(seq, port);
snd_seq_close(seq);
}
else
{
usage(argv[0]);
}
return 0;
}
int MidiDriver_ALSA::open() {
if (_isOpen)
return MERR_ALREADY_OPEN;
_isOpen = true;
if (my_snd_seq_open(&seq_handle) < 0) {
error("Can't open sequencer");
return -1;
}
my_client = snd_seq_client_id(seq_handle);
if (snd_seq_set_client_name(seq_handle, "RESIDUALVM") < 0) {
error("Can't set sequencer client name");
}
snd_seq_set_client_group(seq_handle, "input");
// According to http://www.alsa-project.org/~tiwai/alsa-subs.html
// you can set read or write capabilities to allow other clients to
// read or write the port. I don't think we need that, unless maybe
// to be able to record the sound, but I can't get that to work even
// with those capabilities.
my_port = snd_seq_create_simple_port(seq_handle, "RESIDUALVM port 0", 0,
SND_SEQ_PORT_TYPE_MIDI_GENERIC | SND_SEQ_PORT_TYPE_APPLICATION);
if (my_port < 0) {
snd_seq_close(seq_handle);
error("Can't create port");
return -1;
}
if (seq_client != SND_SEQ_ADDRESS_SUBSCRIBERS) {
// Subscribe to MIDI port. Prefer one that doesn't already have
// any connections, unless we've forced a port number already.
if (seq_port == -1) {
snd_seq_client_info_t *cinfo;
snd_seq_port_info_t *pinfo;
snd_seq_client_info_alloca(&cinfo);
snd_seq_port_info_alloca(&pinfo);
snd_seq_get_any_client_info(seq_handle, seq_client, cinfo);
int first_port = -1;
int found_port = -1;
snd_seq_port_info_set_client(pinfo, seq_client);
snd_seq_port_info_set_port(pinfo, -1);
while (found_port == -1 && snd_seq_query_next_port(seq_handle, pinfo) >= 0) {
if (check_permission(pinfo)) {
if (first_port == -1)
first_port = snd_seq_port_info_get_port(pinfo);
if (found_port == -1 && snd_seq_port_info_get_write_use(pinfo) == 0)
found_port = snd_seq_port_info_get_port(pinfo);
}
}
if (found_port == -1) {
// Should we abort here? For now, use the first
// available port.
seq_port = first_port;
warning("MidiDriver_ALSA: All ports on client %d (%s) are already in use", seq_client, snd_seq_client_info_get_name(cinfo));
} else {
seq_port = found_port;
}
}
if (snd_seq_connect_to(seq_handle, my_port, seq_client, seq_port) < 0) {
error("Can't subscribe to MIDI port (%d:%d) see README for help", seq_client, seq_port);
}
}
printf("Connected to Alsa sequencer client [%d:%d]\n", seq_client, seq_port);
printf("ALSA client initialized [%d:0]\n", my_client);
return 0;
}
struct a2j_port *
a2j_port_create (alsa_midi_driver_t * driver, int dir, snd_seq_addr_t addr, const snd_seq_port_info_t * info)
{
struct a2j_port *port;
int err;
int client;
snd_seq_client_info_t * client_info_ptr;
int jack_caps;
struct a2j_stream * stream_ptr;
stream_ptr = &driver->stream[dir];
if ((err = snd_seq_client_info_malloc (&client_info_ptr)) != 0) {
a2j_error("Failed to allocate client info");
goto fail;
}
client = snd_seq_port_info_get_client (info);
err = snd_seq_get_any_client_info (driver->seq, client, client_info_ptr);
if (err != 0) {
a2j_error("Failed to get client info");
goto fail_free_client_info;
}
a2j_debug ("client name: '%s'", snd_seq_client_info_get_name(client_info_ptr));
a2j_debug ("port name: '%s'", snd_seq_port_info_get_name(info));
port = calloc (1, sizeof(struct a2j_port));
if (!port) {
goto fail_free_client_info;
}
port->driver_ptr = driver;
port->jack_port = JACK_INVALID_PORT;
port->remote = addr;
a2j_port_fill_name (port, dir, client_info_ptr, info, false);
/* Add port to list early, before registering to JACK, so map functionality is guaranteed to work during port registration */
list_add_tail (&port->siblings, &stream_ptr->list);
if (dir == A2J_PORT_CAPTURE) {
jack_caps = JackPortIsOutput;
} else {
jack_caps = JackPortIsInput;
}
/* mark anything that looks like a hardware port as physical&terminal */
if (snd_seq_port_info_get_type (info) & (SND_SEQ_PORT_TYPE_HARDWARE|SND_SEQ_PORT_TYPE_PORT|SND_SEQ_PORT_TYPE_SPECIFIC)) {
jack_caps |= JackPortIsPhysical|JackPortIsTerminal;
}
port->jack_port = jack_port_register (driver->jack_client, port->name, JACK_DEFAULT_MIDI_TYPE, jack_caps, 0);
if (port->jack_port == JACK_INVALID_PORT) {
a2j_error("jack_port_register() failed for '%s'", port->name);
goto fail_free_port;
}
if (dir == A2J_PORT_CAPTURE) {
err = a2j_alsa_connect_from (driver, port->remote.client, port->remote.port);
} else {
err = snd_seq_connect_to (driver->seq, driver->port_id, port->remote.client, port->remote.port);
}
if (err) {
a2j_debug("port skipped: %s", port->name);
goto fail_free_port;
}
port->inbound_events = jack_ringbuffer_create(MAX_EVENT_SIZE*16);
a2j_debug("port created: %s", port->name);
return port;
fail_free_port:
list_del (&port->siblings);
a2j_port_free (port);
fail_free_client_info:
snd_seq_client_info_free (client_info_ptr);
fail:
return NULL;
}
/** main
*
*/
int
main ( int argc, char **argv )
{
fprintf( stderr, "lsmi-joystick" " v" VERSION "\n" );
get_args( argc, argv );
fprintf( stderr, "Registering MIDI port...\n" );
seq = open_client( CLIENT_NAME );
if ( NULL == seq )
{
fprintf( stderr, "Error opening alsa sequencer!\n" );
exit( 1 );
}
if ( ( port = open_output_port( seq ) ) < 0 )
{
fprintf( stderr, "Error opening MIDI output port!\n" );
exit( 1 );
}
if ( sub_name )
{
snd_seq_addr_t addr;
if ( snd_seq_parse_address( seq, &addr, sub_name ) < 0 )
fprintf( stderr, "Couldn't parse address '%s'", sub_name );
else
if ( snd_seq_connect_to( seq, port, addr.client, addr.port ) < 0 )
{
fprintf( stderr, "Error creating subscription for port %i:%i", addr.client, addr.port );
exit( 1 );
}
}
if ( daemonize )
{
printf( "Running as daemon...\n" );
if ( fork() )
exit( 0 );
else
{
fclose( stdout );
fclose( stderr );
}
}
fprintf( stderr, "Initializing joystick...\n" );
if ( -1 == ( jfd = open( joydevice, O_RDONLY ) ) )
{
fprintf( stderr, "Error opening event interface! (%s)\n", strerror( errno ) );
clean_up();
exit(1);
}
set_traps();
fprintf( stderr, "Waiting for events...\n" );
for ( ;; )
{
struct js_event e;
snd_seq_event_t ev;
static int b1;
static int b2;
read (jfd, &e, sizeof(struct js_event));
snd_seq_ev_clear( &ev );
switch (e.type)
{
case JS_EVENT_BUTTON:
switch (e.number)
{
case 0:
if(e.value)
b1 = 1;
else
{
b1 = 0;
snd_seq_ev_set_pitchbend( &ev, channel, 0 );
send_event( &ev );
}
break;
case 1:
if (e.value)
b2 = 1;
else
{
b2 = 0;
snd_seq_ev_set_controller( &ev, channel, 1, 0 );
send_event( &ev );
snd_seq_ev_set_controller( &ev, channel, 33, 0 );
send_event( &ev );
}
break;
}
break;
case JS_EVENT_AXIS:
if ( e.number == 1 && ( b1 || nohold ) )
{
snd_seq_ev_set_pitchbend( &ev, channel, 0 - (int)((e.value) * ((float)8191/32767) ));
send_event( &ev );
}
else
if ( ( e.number == 1 && b2 ) ||
( e.number == 0 && ( ( b1 && b2 ) || nohold ) )
)
{
int fine = (int)((0 - e.value) + 32767) * ((float)16383/65534);
int course = fine >> 7;
fine &= 0x7F;
snd_seq_ev_set_controller( &ev, channel, 1, course );
send_event( &ev );
snd_seq_ev_set_controller( &ev, channel, 33, fine );
send_event( &ev );
}
break;
default:
break;
}
}
/** main
*
*/
int
main ( int argc, char **argv )
{
snd_seq_event_t ev;
struct input_event iev;
snd_seq_addr_t addr;
fprintf( stderr, "lsmi-mouse" " v" VERSION "\n" );
get_args( argc, argv );
fprintf( stderr, "Initializing mouse interface...\n" );
if ( -1 == ( fd = open( device, O_RDONLY ) ) )
{
fprintf( stderr, "Error opening event interface! (%s)\n", strerror( errno ) );
exit(1);
}
init_mouse();
fprintf( stderr, "Registering MIDI port...\n" );
seq = open_client( CLIENT_NAME );
port = open_output_port( seq );
if ( sub_name )
{
if ( snd_seq_parse_address( seq, &addr, sub_name ) < 0 )
fprintf( stderr, "Couldn't parse address '%s'", sub_name );
else
if ( snd_seq_connect_to( seq, port, addr.client, addr.port ) < 0 )
{
fprintf( stderr, "Error creating subscription for port %i:%i", addr.client, addr.port );
exit( 1 );
}
}
if ( daemonize )
{
printf( "Running as daemon...\n" );
if ( fork() )
exit( 0 );
else
{
fclose( stdout );
fclose( stderr );
}
}
set_traps();
fprintf( stderr, "Waiting for packets...\n" );
for ( ;; )
{
int i;
read( fd, &iev, sizeof( iev ) );
if ( iev.type != EV_KEY )
continue;
switch ( iev.code )
{
case BTN_LEFT: i = 0; break;
case BTN_MIDDLE: i = 1; break;
case BTN_RIGHT: i = 2; break;
break;
default:
continue;
break;
}
snd_seq_ev_clear( &ev );
switch ( ev.type = map[i].ev_type )
{
case SND_SEQ_EVENT_CONTROLLER:
snd_seq_ev_set_controller( &ev, map[i].channel,
map[i].number,
iev.value == DOWN ? 127 : 0 );
break;
case SND_SEQ_EVENT_NOTEON:
snd_seq_ev_set_noteon( &ev, map[i].channel,
map[i].number,
iev.value == DOWN ? 127 : 0 );
break;
default:
fprintf( stderr,
"Internal error: invalid mapping!\n" );
continue;
break;
}
send_event( &ev );
}
}
int main(int argc, char *argv[]) {
int getopt_return;
int option_index;
int valid;
snd_seq_t *seq_handle;
int out_port;
snd_seq_addr_t seq_addr;
snd_seq_event_t ev;
valid = 0;
while (((getopt_return = getopt_long(argc, argv, "ha:p:c:b:n:o:", options, &option_index)) >= 0) && (valid < 2)) {
switch(getopt_return) {
case 'a':
valid++;
if (snd_seq_open(&seq_handle, "hw", SND_SEQ_OPEN_DUPLEX, 0) < 0) {
fprintf(stderr, "Error opening ALSA sequencer.\n");
exit(1);
}
snd_seq_set_client_name(seq_handle, "MidiSend");
if ((out_port = snd_seq_create_simple_port(seq_handle, "MidiSend",
SND_SEQ_PORT_CAP_READ|SND_SEQ_PORT_CAP_SUBS_READ,
SND_SEQ_PORT_TYPE_APPLICATION)) < 0) {
fprintf(stderr, "Error creating sequencer port.\n");
exit(1);
}
snd_seq_parse_address(seq_handle, &seq_addr, optarg);
snd_seq_connect_to(seq_handle, out_port, seq_addr.client, seq_addr.port);
snd_seq_ev_clear(&ev);
snd_seq_ev_set_subs(&ev);
snd_seq_ev_set_direct(&ev);
snd_seq_ev_set_source(&ev, out_port);
break;
case 'p':
if (valid) {
valid++;
if (argc < 6) {
fprintf(stderr, "\nMissing parameter(s): midisend --program <ch> <prg>\n\n");
} else {
ev.data.control.channel = atoi(optarg);
ev.type = SND_SEQ_EVENT_PGMCHANGE;
ev.data.control.value = atoi(argv[optind]);
}
}
break;
case 'c':
if (valid) {
valid++;
if (argc < 7) {
fprintf(stderr, "\nMissing parameter(s): midisend --control <ch> <ctrl> <val>\n\n");
} else {
ev.data.control.channel = atoi(optarg);
ev.type = SND_SEQ_EVENT_CONTROLLER;
ev.data.control.param = atoi(argv[optind]);
ev.data.control.value = atoi(argv[optind + 1]);
}
}
break;
case 'b':
if (valid) {
valid++;
if (argc < 6) {
fprintf(stderr, "\nMissing parameter(s): midisend --bend <ch> <val>\n\n");
} else {
ev.data.control.channel = atoi(optarg);
ev.type = SND_SEQ_EVENT_PITCHBEND;
ev.data.control.value = atoi(argv[optind]) - 8192;
}
}
break;
case 'n':
if (valid) {
valid++;
if (argc < 8) {
fprintf(stderr, "\nMissing parameter(s): midisend --note <ch> <on> <num> <vel>\n\n");
} else {
ev.data.control.channel = atoi(optarg);
ev.type = (atoi(argv[optind])) ? SND_SEQ_EVENT_NOTEON : SND_SEQ_EVENT_NOTEOFF;
ev.data.note.note = atoi(argv[optind + 1]);
ev.data.note.velocity = atoi(argv[optind + 2]);
}
}
break;
case 'o':
if (valid) {
valid++;
if (argc < 5) {
fprintf(stderr, "\nMissing parameter(s): midisend --off <ch>\n\n");
} else {
ev.data.control.channel = atoi(optarg);
ev.type = SND_SEQ_EVENT_CONTROLLER;
ev.data.control.param = MIDI_CTL_ALL_NOTES_OFF;
ev.data.control.value = 0;
}
}
break;
case 'h':
valid = 3;
printf("\nMidiSend 0.0.1\nWritten by Matthias Nagorni\n");
printf("(c)2004 SUSE Linux AG Nuremberg\n");
printf("Licensed under GNU General Public License\n\n");
printf("--alsa <port> ALSA Sequencer Port (e.g. 64:0)\n");
printf("--program <ch> <prg> Program Change\n");
printf("--control <ch> <ctrl> <val> Control Change\n");
printf("--bend <ch> <val> Pitch Bend (0..16383, center = 8192)\n");
printf("--note <ch> <on> <num> <vel> Note On (on=1) Note Off (on=0)\n");
printf("--off <ch> All Notes Off\n\n");
exit(EXIT_SUCCESS);
}
}
if (valid < 2) {
fprintf(stderr, "\nUsage: midisend PORT COMMAND PARAMETERS\n\n");
fprintf(stderr, "Type \'midisend -h\' for a list of valid commands.\n\n");
} else if (valid == 2) {
snd_seq_event_output_direct(seq_handle, &ev);
}
}
static GstStateChangeReturn
gst_amidisrc_change_state (GstElement * element, GstStateChange transition )
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GstaMIDISrc *src = GST_AMIDISRC (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
// TODO: Open our listen alsa ports
// 1. Open sequencer
// 2. If we have a client and port, connect to them
printf("***Here: %s:%d\n",__FILE__,__LINE__);
if ((snd_seq_open(&src->a_seq, src->device, SND_SEQ_OPEN_INPUT, 0)) < 0)
return GST_STATE_CHANGE_FAILURE;
if( src->a_seq == NULL )
return GST_STATE_CHANGE_FAILURE;
snd_seq_set_client_name(src->a_seq, "gstreamer");
if ((src->a_port = snd_seq_create_simple_port(src->a_seq, "In",
SND_SEQ_PORT_CAP_WRITE |
SND_SEQ_PORT_CAP_SUBS_WRITE,
SND_SEQ_PORT_TYPE_MIDI_GENERIC)) < 0)
{
return GST_STATE_CHANGE_FAILURE;
}
src->a_queue = snd_seq_alloc_queue(src->a_seq);
if( src->a_queue < 0 )
return GST_STATE_CHANGE_FAILURE;
// Only connect if we have positive client/port
if( src->client >= 0 && src->port >= 0 )
{
if( snd_seq_connect_to(src->a_seq, src->a_port, src->client, src->port) < 0 )
return GST_STATE_CHANGE_FAILURE;
}
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
return GST_STATE_CHANGE_NO_PREROLL;
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
// TODO: close our listening alsa ports
// disconnect from midi port
printf("***Here: %s:%d\n",__FILE__,__LINE__);
if( src->a_queue >= 0 ){
if( snd_seq_free_queue( src->a_seq, src->a_queue ) < 0 )
return GST_STATE_CHANGE_FAILURE;
}
if( src->a_port >= 0 && src->a_seq != NULL){
if( snd_seq_delete_simple_port(src->a_seq,src->a_port) < 0 ){
return GST_STATE_CHANGE_FAILURE;
}
}
if( snd_seq_close( src->a_seq ) < 0 )
return GST_STATE_CHANGE_FAILURE;
break;
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
return GST_STATE_CHANGE_NO_PREROLL;
break;
default:
break;
}
return ret;
}