JackMidiDriver.cpp
/*
Copyright (C) 2009 Grame.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
(at your option) any later version.
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "JackSystemDeps.h"
#include "JackMidiDriver.h"
#include "JackTime.h"
#include "JackError.h"
#include "JackEngineControl.h"
#include "JackPort.h"
#include "JackGraphManager.h"
#include "JackException.h"
#include <assert.h>
using namespace std;
namespace Jack
{
JackMidiDriver::JackMidiDriver(const char* name, const char* alias, JackLockedEngine* engine, JackSynchro* table)
: JackDriver(name, alias, engine, table)
{}
JackMidiDriver::~JackMidiDriver()
{}
int JackMidiDriver::Open(bool capturing,
bool playing,
int inchannels,
int outchannels,
bool monitor,
const char* capture_driver_name,
const char* playback_driver_name,
jack_nframes_t capture_latency,
jack_nframes_t playback_latency)
{
fCaptureChannels = inchannels;
fPlaybackChannels = outchannels;
return JackDriver::Open(0, 0, capturing, playing, inchannels, outchannels, monitor, capture_driver_name, playback_driver_name, capture_latency, playback_latency);
}
int JackMidiDriver::Attach()
{
JackPort* port;
jack_port_id_t port_index;
char name[REAL_JACK_PORT_NAME_SIZE+1];
char alias[REAL_JACK_PORT_NAME_SIZE+1];
int i;
jack_log("JackMidiDriver::Attach fBufferSize = %ld fSampleRate = %ld", fEngineControl->fBufferSize, fEngineControl->fSampleRate);
for (i = 0; i < fCaptureChannels; i++) {
snprintf(alias, sizeof(alias), "%s:%s:out%d", fAliasName, fCaptureDriverName, i + 1);
snprintf(name, sizeof(name), "%s:capture_%d", fClientControl.fName, i + 1);
if (fEngine->PortRegister(fClientControl.fRefNum, name, JACK_DEFAULT_MIDI_TYPE, CaptureDriverFlags, fEngineControl->fBufferSize, &port_index) < 0) {
jack_error("driver: cannot register port for %s", name);
return -1;
}
port = fGraphManager->GetPort(port_index);
port->SetAlias(alias);
fCapturePortList[i] = port_index;
jack_log("JackMidiDriver::Attach fCapturePortList[i] port_index = %ld", port_index);
}
for (i = 0; i < fPlaybackChannels; i++) {
snprintf(alias, sizeof(alias), "%s:%s:in%d", fAliasName, fPlaybackDriverName, i + 1);
snprintf(name, sizeof(name), "%s:playback_%d", fClientControl.fName, i + 1);
if (fEngine->PortRegister(fClientControl.fRefNum, name, JACK_DEFAULT_MIDI_TYPE, PlaybackDriverFlags, fEngineControl->fBufferSize, &port_index) < 0) {
jack_error("driver: cannot register port for %s", name);
return -1;
}
port = fGraphManager->GetPort(port_index);
port->SetAlias(alias);
fPlaybackPortList[i] = port_index;
jack_log("JackMidiDriver::Attach fPlaybackPortList[i] port_index = %ld", port_index);
}
UpdateLatencies();
return 0;
}
int JackMidiDriver::Detach()
{
int i;
jack_log("JackMidiDriver::Detach");
for (i = 0; i < fCaptureChannels; i++) {
fEngine->PortUnRegister(fClientControl.fRefNum, fCapturePortList[i]);
}
for (i = 0; i < fPlaybackChannels; i++) {
fEngine->PortUnRegister(fClientControl.fRefNum, fPlaybackPortList[i]);
}
return 0;
}
void JackMidiDriver::UpdateLatencies()
{
jack_latency_range_t range;
for (int i = 0; i < fCaptureChannels; i++) {
range.max = range.min = fEngineControl->fBufferSize;
fGraphManager->GetPort(fCapturePortList[i])->SetLatencyRange(JackCaptureLatency, &range);
}
for (int i = 0; i < fPlaybackChannels; i++) {
if (! fEngineControl->fSyncMode) {
range.max = range.min = fEngineControl->fBufferSize * 2;
}
fGraphManager->GetPort(fPlaybackPortList[i])->SetLatencyRange(JackPlaybackLatency, &range);
}
}
int JackMidiDriver::SetBufferSize(jack_nframes_t buffer_size)
{
UpdateLatencies();
return 0;
}
int JackMidiDriver::ProcessReadSync()
{
int res = 0;
// Read input buffers for the current cycle
if (Read() < 0) {
jack_error("JackMidiDriver::ProcessReadSync: read error");
res = -1;
}
if (ResumeRefNum() < 0) {
jack_error("JackMidiDriver::ProcessReadSync: ResumeRefNum error");
res = -1;
}
return res;
}
int JackMidiDriver::ProcessWriteSync()
{
int res = 0;
if (SuspendRefNum() < 0) {
jack_error("JackMidiDriver::ProcessWriteSync: SuspendRefNum error");
res = -1;
}
// Write output buffers from the current cycle
if (Write() < 0) {
jack_error("JackMidiDriver::ProcessWriteSync: write error");
res = -1;
}
return res;
}
int JackMidiDriver::ProcessReadAsync()
{
int res = 0;
// Read input buffers for the current cycle
if (Read() < 0) {
jack_error("JackMidiDriver::ProcessReadAsync: read error");
res = -1;
}
// Write output buffers from the previous cycle
if (Write() < 0) {
jack_error("JackMidiDriver::ProcessReadAsync: write error");
res = -1;
}
if (ResumeRefNum() < 0) {
jack_error("JackMidiDriver::ProcessReadAsync: ResumeRefNum error");
res = -1;
}
return res;
}
int JackMidiDriver::ProcessWriteAsync()
{
return 0;
}
JackMidiBuffer* JackMidiDriver::GetInputBuffer(int port_index)
{
assert(fCapturePortList[port_index]);
return (JackMidiBuffer*)fGraphManager->GetBuffer(fCapturePortList[port_index], fEngineControl->fBufferSize);
}
JackMidiBuffer* JackMidiDriver::GetOutputBuffer(int port_index)
{
assert(fPlaybackPortList[port_index]);
return (JackMidiBuffer*)fGraphManager->GetBuffer(fPlaybackPortList[port_index], fEngineControl->fBufferSize);
}
} // end of namespace
Jack
Definition: JackAC3Encoder.cpp:30
std
jack_error
SERVER_EXPORT void jack_error(const char *fmt,...)
Definition: JackError.cpp:92
_jack_latency_range::min
jack_nframes_t min
Definition: types.h:270
_jack_latency_range
Definition: types.h:265
_jack_latency_range::max
jack_nframes_t max
Definition: types.h:274
jack_log
SERVER_EXPORT void jack_log(const char *fmt,...)
Definition: JackError.cpp:108