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 printf ("powermate: Opening of powermate failed - %s\n", strerror(errno));
113 PowermateControlProtocol::set_active (bool inActivate)
115 if (inActivate != _active) {
119 mPort = find_powermate(O_RDONLY);
125 if (pthread_create (&mThread, 0, SerialThreadEntry, this) == 0) {
131 printf("Powermate Control Protocol activated\n");
134 pthread_cancel (mThread);
137 printf("Powermate Control Protocol deactivated\n");
145 PowermateControlProtocol::get_state ()
147 XMLNode* node = new XMLNode (X_("Protocol"));
148 node->add_property (X_("name"), _name);
153 PowermateControlProtocol::set_state (const XMLNode& /*node*/)
160 PowermateControlProtocol::SerialThreadEntry (void* arg)
162 return static_cast<PowermateControlProtocol*>(arg)->SerialThread ();
165 #define BUFFER_SIZE 32
168 bool skippingMarkers = false;
171 PowermateControlProtocol::ProcessEvent(struct input_event *ev)
174 fprintf(stderr, "type=0x%04x, code=0x%04x, value=%d\n",
175 ev->type, ev->code, (int)ev->value);
180 printf("The LED pulse settings were changed; code=0x%04x, value=0x%08x\n", ev->code, ev->value);
183 if(ev->code != REL_DIAL)
184 fprintf(stderr, "Warning: unexpected rotation event; ev->code = 0x%04x\n", ev->code);
187 //click and hold to skip forward and back by markers
188 skippingMarkers = true;;
194 //scale the range so that we can go from +/-8x within 180 degrees, with less precision at the higher speeds
195 float speed = get_transport_speed();
196 speed += (float)ev->value * 0.05;
197 if (speed > 1.5 || speed < -1.5 )
199 set_transport_speed( speed );
204 if(ev->code != BTN_0)
205 fprintf(stderr, "Warning: unexpected key event; ev->code = 0x%04x\n", ev->code);
211 if (skippingMarkers) {
212 skippingMarkers = false;
214 if (get_transport_speed() == 0.0) {
215 set_transport_speed(1.0);
217 set_transport_speed(0.0);
228 PowermateControlProtocol::SerialThread ()
230 struct input_event ibuffer[BUFFER_SIZE];
234 r = read(mPort, ibuffer, sizeof(struct input_event) * BUFFER_SIZE);
236 events = r / sizeof(struct input_event);
237 for(i=0; i<events; i++)
238 ProcessEvent(&ibuffer[i]);
240 fprintf(stderr, "read() failed: %s\n", strerror(errno));