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-rw-r--r--src/engine/RaulJackDriver.cpp248
-rw-r--r--src/engine/RaulJackDriver.hpp120
2 files changed, 368 insertions, 0 deletions
diff --git a/src/engine/RaulJackDriver.cpp b/src/engine/RaulJackDriver.cpp
new file mode 100644
index 0000000..b6bbd27
--- /dev/null
+++ b/src/engine/RaulJackDriver.cpp
@@ -0,0 +1,248 @@
+/* This file is part of Raul.
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ *
+ * Raul 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 (at your option) any later
+ * version.
+ *
+ * Raul 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 GNU General Public License for 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.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <cassert>
+#include <cstring>
+#include <string>
+#include <iostream>
+#include <jack/jack.h>
+#include <jack/statistics.h>
+#include <jack/thread.h>
+#include <raul/JackDriver.hpp>
+
+using std::cerr; using std::endl;
+using std::string;
+
+namespace Raul {
+
+
+JackDriver::JackDriver()
+: _client(NULL)
+, _is_activated(false)
+, _xruns(0)
+, _xrun_delay(0)
+{
+ _last_pos.frame = 0;
+ _last_pos.valid = (jack_position_bits_t)0;
+}
+
+
+JackDriver::~JackDriver()
+{
+ detach();
+}
+
+
+/** Connect to Jack.
+ */
+void
+JackDriver::attach(const string& client_name, string server_name)
+{
+ // Already connected
+ if (_client)
+ return;
+
+ jack_set_error_function(error_cb);
+
+ if (server_name.length() > 0)
+ _client = jack_client_open(client_name.c_str(), JackServerName, NULL,
+ server_name.c_str(), NULL);
+ else
+ _client = jack_client_open(client_name.c_str(), JackNullOption, NULL, NULL);
+
+ if (_client == NULL) {
+ //_app->status_message("[JACK] Unable to create client");
+ _is_activated = false;
+ } else {
+ jack_set_error_function(error_cb);
+ jack_on_shutdown(_client, jack_shutdown_cb, this);
+ jack_set_port_registration_callback(_client, jack_port_registration_cb, this);
+ jack_set_graph_order_callback(_client, jack_graph_order_cb, this);
+ jack_set_buffer_size_callback(_client, jack_buffer_size_cb, this);
+ jack_set_xrun_callback(_client, jack_xrun_cb, this);
+ jack_set_process_callback(_client, jack_process_cb, this);
+
+ //_is_dirty = true;
+ _buffer_size = jack_get_buffer_size(_client);
+ }
+}
+
+
+void
+JackDriver::detach()
+{
+ if (_client) {
+ deactivate();
+ jack_client_close(_client);
+ _client = NULL;
+ _is_activated = false;
+ //signal_detached.emit();
+ }
+}
+
+
+void
+JackDriver::activate()
+{
+ if (!jack_activate(_client)) {
+ _is_activated = true;
+ //signal_attached.emit();
+ //_app->status_message("[JACK] Attached");
+ } else {
+ //_app->status_message("[JACK] ERROR: Failed to attach");
+ _is_activated = false;
+ }
+}
+
+
+void
+JackDriver::deactivate()
+{
+ if (_client)
+ jack_deactivate(_client);
+
+ _is_activated = false;
+}
+
+
+void
+JackDriver::jack_port_registration_cb(jack_port_id_t /*port_id*/, int /*registered*/, void* /*jack_driver*/)
+{
+ /* whatever. */
+}
+
+
+int
+JackDriver::jack_graph_order_cb(void* jack_driver)
+{
+ JackDriver* me = reinterpret_cast<JackDriver*>(jack_driver);
+
+ assert(me);
+ me->on_graph_order_changed();
+
+ return 0;
+}
+
+
+int
+JackDriver::jack_xrun_cb(void* jack_driver)
+{
+ JackDriver* me = reinterpret_cast<JackDriver*>(jack_driver);
+
+ assert(me);
+
+ me->_xruns++;
+ me->_xrun_delay = jack_get_xrun_delayed_usecs(me->_client);
+ me->reset_delay();
+
+ me->on_xrun();
+
+ return 0;
+}
+
+
+int
+JackDriver::jack_buffer_size_cb(jack_nframes_t buffer_size, void* jack_driver)
+{
+ JackDriver* me = reinterpret_cast<JackDriver*>(jack_driver);
+
+ assert(me);
+ me->reset_xruns();
+ me->reset_delay();
+ me->on_buffer_size_changed(buffer_size);
+ me->_buffer_size = buffer_size;
+
+ return 0;
+}
+
+
+int
+JackDriver::jack_process_cb(jack_nframes_t nframes, void* jack_driver)
+{
+ JackDriver* me = reinterpret_cast<JackDriver*>(jack_driver);
+
+ assert(me);
+
+ me->on_process(nframes);
+
+ return 0;
+}
+
+
+void
+JackDriver::jack_shutdown_cb(void* jack_driver)
+{
+ JackDriver* me = reinterpret_cast<JackDriver*>(jack_driver);
+ assert(me);
+
+ me->reset_delay();
+ me->reset_xruns();
+
+ me->on_shutdown();
+
+ me->_client = NULL;
+}
+
+
+void
+JackDriver::error_cb(const char* msg)
+{
+ cerr << "JACK ERROR: " << msg << endl;
+}
+
+
+jack_nframes_t
+JackDriver::buffer_size()
+{
+ if (_is_activated)
+ return _buffer_size;
+ else
+ return jack_get_buffer_size(_client);
+}
+
+
+void
+JackDriver::reset_xruns()
+{
+ _xruns = 0;
+ _xrun_delay = 0;
+}
+
+
+bool
+JackDriver::set_buffer_size(jack_nframes_t size)
+{
+ if (buffer_size() == size) {
+ return true;
+ }
+
+ if (!_client) {
+ _buffer_size = size;
+ return true;
+ }
+
+ if (jack_set_buffer_size(_client, size)) {
+ //_app->status_message("[JACK] ERROR: Unable to set buffer size");
+ return false;
+ } else {
+ return true;
+ }
+}
+
+
+} // namespace Raul
+
diff --git a/src/engine/RaulJackDriver.hpp b/src/engine/RaulJackDriver.hpp
new file mode 100644
index 0000000..f1b92f1
--- /dev/null
+++ b/src/engine/RaulJackDriver.hpp
@@ -0,0 +1,120 @@
+/* This file is part of Raul.
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ *
+ * Raul 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 (at your option) any later
+ * version.
+ *
+ * Raul 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 GNU General Public License for 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.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef RAUL_JACK_DRIVER_HPP
+#define RAUL_JACK_DRIVER_HPP
+
+#include <iostream>
+#include <string>
+#include <jack/jack.h>
+#include <jack/statistics.h>
+
+namespace Raul {
+
+
+/** Jack based driver for an audio context.
+ *
+ * Apps can override the on_* methods of this class to implement reactions
+ * to Jack events (e.g. new port, process callback, etc).
+ */
+class JackDriver
+{
+public:
+ JackDriver();
+ virtual ~JackDriver();
+
+ void attach(const std::string& client_name, std::string server_name="");
+ void detach();
+
+ void activate();
+ void deactivate();
+
+ bool is_activated() const { return _is_activated; }
+ bool is_attached() const { return (_client != NULL); }
+ bool is_realtime() const { return _client && jack_is_realtime(_client); }
+
+ void start_transport() { jack_transport_start(_client); }
+ void stop_transport() { jack_transport_stop(_client); }
+
+ void rewind_transport() {
+ jack_position_t zero;
+ zero.frame = 0;
+ zero.valid = (jack_position_bits_t)0;
+ jack_transport_reposition(_client, &zero);
+ }
+
+ jack_nframes_t buffer_size();
+ bool set_buffer_size(jack_nframes_t size);
+
+ inline jack_nframes_t sample_rate() { return jack_get_sample_rate(_client); }
+
+ inline size_t xruns() { return _xruns; }
+ void reset_xruns();
+
+ inline float max_delay() { return jack_get_max_delayed_usecs(_client); }
+ inline void reset_delay() { jack_reset_max_delayed_usecs(_client); }
+
+ jack_client_t* jack_client() { return _client; }
+
+
+protected:
+ /** Process callback. Derived classes should do all audio processing here. */
+ virtual void on_process(jack_nframes_t /*nframes*/) {}
+
+ /** Graph order change callback. */
+ virtual void on_graph_order_changed() {}
+
+ /** Buffer size changed callback.
+ * At the time this is called, buffer_size() will still return the old
+ * size. Immediately afterwards, it will be set to the new value.
+ */
+ virtual void on_buffer_size_changed(jack_nframes_t /*size*/) {}
+
+ virtual void on_xrun() {}
+ virtual void on_shutdown() {}
+ virtual void on_error() {}
+
+protected:
+ jack_client_t* _client;
+
+private:
+
+ static void error_cb(const char* msg);
+
+ void destroy_all_ports();
+
+ void update_time();
+
+ static void jack_port_registration_cb(jack_port_id_t port_id, int registered, void* me);
+ static int jack_graph_order_cb(void* me);
+ static int jack_xrun_cb(void* me);
+ static int jack_buffer_size_cb(jack_nframes_t buffer_size, void* me);
+ static int jack_process_cb(jack_nframes_t nframes, void* me);
+
+ static void jack_shutdown_cb(void* me);
+
+ bool _is_activated;
+ jack_position_t _last_pos;
+ jack_nframes_t _buffer_size;
+ size_t _xruns;
+ float _xrun_delay;
+};
+
+
+} // namespace Raul
+
+#endif // RAUL_JACK_DRIVER_HPP
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