4 Created: 03/26/07 20:07:56
8 #include <linux/input.h>
16 #include <pbd/xml++.h>
17 #include <pbd/error.h>
20 #include "powermate.h"
22 using namespace ARDOUR;
27 #define NUM_VALID_PREFIXES 2
29 static const char *valid_prefix[NUM_VALID_PREFIXES] = {
34 #define NUM_EVENT_DEVICES 16
36 int open_powermate (const char *dev, int mode)
38 if (!Glib::file_test (dev, Glib::FILE_TEST_EXISTS)) {
42 int fd = open(dev, mode);
47 if (errno != EACCES) {
48 error << string_compose ("Unable to open \"%1\": %2", dev, strerror(errno)) << endmsg;
53 /* placate valgrind */
56 if (ioctl (fd, EVIOCGNAME (sizeof(name)), name) < 0) {
57 error << string_compose ("\"%1\": EVIOCGNAME failed: %2", dev, strerror(errno)) << endmsg;
62 // it's the correct device if the prefix matches what we expect it to be:
63 for (i = 0; i < NUM_VALID_PREFIXES; ++i) {
64 if (!strncasecmp (name, valid_prefix[i], strlen (valid_prefix[i]))) {
73 int find_powermate(int mode)
78 for(i=0; i<NUM_EVENT_DEVICES; i++){
79 sprintf(devname, "/dev/input/event%d", i);
80 r = open_powermate(devname, mode);
88 PowermateControlProtocol::PowermateControlProtocol (Session& s)
89 : ControlProtocol (s, "powermate")
93 PowermateControlProtocol::~PowermateControlProtocol ()
99 PowermateControlProtocol::probe ()
101 int port = find_powermate( O_RDONLY );
104 if (errno == ENOENT) {
105 printf ("ardour: [INFO]: Powermate device not found; perhaps you have no powermate connected.\n");
107 printf ("powermate: Opening of powermate failed - %s\n", strerror(errno));
117 PowermateControlProtocol::set_active (bool inActivate)
119 if (inActivate != _active) {
123 mPort = find_powermate(O_RDONLY);
129 if (pthread_create (&mThread, 0, SerialThreadEntry, this) == 0) {
135 printf("Powermate Control Protocol activated\n");
138 pthread_cancel (mThread);
141 printf("Powermate Control Protocol deactivated\n");
149 PowermateControlProtocol::get_state ()
151 XMLNode* node = new XMLNode (X_("Protocol"));
152 node->add_property (X_("name"), _name);
157 PowermateControlProtocol::set_state (const XMLNode& /*node*/)
164 PowermateControlProtocol::SerialThreadEntry (void* arg)
166 return static_cast<PowermateControlProtocol*>(arg)->SerialThread ();
169 #define BUFFER_SIZE 32
172 bool skippingMarkers = false;
175 PowermateControlProtocol::ProcessEvent(struct input_event *ev)
178 fprintf(stderr, "type=0x%04x, code=0x%04x, value=%d\n",
179 ev->type, ev->code, (int)ev->value);
184 printf("The LED pulse settings were changed; code=0x%04x, value=0x%08x\n", ev->code, ev->value);
187 if(ev->code != REL_DIAL)
188 fprintf(stderr, "Warning: unexpected rotation event; ev->code = 0x%04x\n", ev->code);
191 //click and hold to skip forward and back by markers
192 skippingMarkers = true;;
198 //scale the range so that we can go from +/-8x within 180 degrees, with less precision at the higher speeds
199 float speed = get_transport_speed();
200 speed += (float)ev->value * 0.05;
201 if (speed > 1.5 || speed < -1.5 )
203 set_transport_speed( speed );
208 if(ev->code != BTN_0)
209 fprintf(stderr, "Warning: unexpected key event; ev->code = 0x%04x\n", ev->code);
215 if (skippingMarkers) {
216 skippingMarkers = false;
218 if (get_transport_speed() == 0.0) {
219 set_transport_speed(1.0);
221 set_transport_speed(0.0);
232 PowermateControlProtocol::SerialThread ()
234 struct input_event ibuffer[BUFFER_SIZE];
238 r = read(mPort, ibuffer, sizeof(struct input_event) * BUFFER_SIZE);
240 events = r / sizeof(struct input_event);
241 for(i=0; i<events; i++)
242 ProcessEvent(&ibuffer[i]);
244 fprintf(stderr, "read() failed: %s\n", strerror(errno));