4 Created: 03/26/07 20:07:56
8 #include <linux/input.h>
17 #include "pbd/pthread_utils.h"
18 #include "pbd/xml++.h"
19 #include "pbd/error.h"
21 #include "powermate.h"
24 using namespace ARDOUR;
29 #define NUM_VALID_PREFIXES 2
31 static const char *valid_prefix[NUM_VALID_PREFIXES] = {
36 #define NUM_EVENT_DEVICES 16
38 int open_powermate (const char *dev, int mode)
40 if (!Glib::file_test (dev, Glib::FILE_TEST_EXISTS)) {
44 int fd = open(dev, mode);
49 if (errno != EACCES) {
50 error << string_compose ("Unable to open \"%1\": %2", dev, strerror(errno)) << endmsg;
55 /* placate valgrind */
58 if (ioctl (fd, EVIOCGNAME (sizeof(name)), name) < 0) {
59 error << string_compose ("\"%1\": EVIOCGNAME failed: %2", dev, strerror(errno)) << endmsg;
64 // it's the correct device if the prefix matches what we expect it to be:
65 for (i = 0; i < NUM_VALID_PREFIXES; ++i) {
66 if (!strncasecmp (name, valid_prefix[i], strlen (valid_prefix[i]))) {
75 int find_powermate(int mode)
80 for (i = 0; i < NUM_EVENT_DEVICES; i++) {
81 sprintf (devname, "/dev/input/event%d", i);
82 r = open_powermate (devname, mode);
91 PowermateControlProtocol::PowermateControlProtocol (Session& s)
92 : ControlProtocol (s, "powermate")
96 PowermateControlProtocol::~PowermateControlProtocol ()
102 PowermateControlProtocol::probe ()
104 int port = find_powermate( O_RDONLY );
107 if (errno == ENOENT) {
108 info << "Powermate device not found; perhaps you have no powermate connected" << endmsg;
110 printf ("powermate: Opening of powermate failed - %s\n", strerror(errno));
120 PowermateControlProtocol::set_active (bool inActivate)
122 if (inActivate != _active) {
126 mPort = find_powermate(O_RDONLY);
132 if (pthread_create_and_store ("Powermate", &mThread, SerialThreadEntry, this) == 0) {
138 printf("Powermate Control Protocol activated\n");
141 pthread_cancel (mThread);
144 printf("Powermate Control Protocol deactivated\n");
152 PowermateControlProtocol::get_state ()
154 XMLNode* node = new XMLNode (X_("Protocol"));
155 node->add_property (X_("name"), _name);
160 PowermateControlProtocol::set_state (const XMLNode& /*node*/, int /*version*/)
167 PowermateControlProtocol::SerialThreadEntry (void* arg)
169 static_cast<PowermateControlProtocol*>(arg)->register_thread ("Powermate");
170 return static_cast<PowermateControlProtocol*>(arg)->SerialThread ();
173 #define BUFFER_SIZE 32
176 bool skippingMarkers = false;
179 PowermateControlProtocol::ProcessEvent(struct input_event *ev)
182 fprintf(stderr, "type=0x%04x, code=0x%04x, value=%d\n",
183 ev->type, ev->code, (int)ev->value);
188 printf("The LED pulse settings were changed; code=0x%04x, value=0x%08x\n", ev->code, ev->value);
191 if(ev->code != REL_DIAL)
192 fprintf(stderr, "Warning: unexpected rotation event; ev->code = 0x%04x\n", ev->code);
195 //click and hold to skip forward and back by markers
196 skippingMarkers = true;;
202 //scale the range so that we can go from +/-8x within 180 degrees, with less precision at the higher speeds
203 float speed = get_transport_speed();
204 speed += (float)ev->value * 0.05;
205 if (speed > 1.5 || speed < -1.5 )
207 set_transport_speed( speed );
212 if(ev->code != BTN_0)
213 fprintf(stderr, "Warning: unexpected key event; ev->code = 0x%04x\n", ev->code);
219 if (skippingMarkers) {
220 skippingMarkers = false;
222 if (get_transport_speed() == 0.0) {
223 set_transport_speed(1.0);
225 set_transport_speed(0.0);
236 PowermateControlProtocol::SerialThread ()
238 struct input_event ibuffer[BUFFER_SIZE];
242 r = read(mPort, ibuffer, sizeof(struct input_event) * BUFFER_SIZE);
244 events = r / sizeof(struct input_event);
245 for(i=0; i<events; i++)
246 ProcessEvent(&ibuffer[i]);
248 fprintf(stderr, "read() failed: %s\n", strerror(errno));