+++ /dev/null
-/*
- powermate.cc
- Ben Loftis
- Created: 03/26/07 20:07:56
-*/
-
-
-#include <linux/input.h>
-#include <cstring>
-#include <cerrno>
-#include <cstdio>
-#include <unistd.h>
-#include <fcntl.h>
-
-#include <glibmm.h>
-
-#include "pbd/pthread_utils.h"
-#include "pbd/xml++.h"
-#include "pbd/error.h"
-
-#include "ardour/debug.h"
-
-#include "powermate.h"
-#include "i18n.h"
-
-using namespace ARDOUR;
-using namespace std;
-using namespace sigc;
-using namespace PBD;
-
-#define NUM_VALID_PREFIXES 2
-
-static const char *valid_prefix[NUM_VALID_PREFIXES] = {
- "Griffin PowerMate",
- "Griffin SoundKnob"
-};
-
-#define NUM_EVENT_DEVICES 16
-
-int open_powermate (const char *dev, int mode)
-{
- if (!Glib::file_test (dev, Glib::FILE_TEST_EXISTS)) {
- return -1;
- }
-
- int fd = open(dev, mode);
- int i;
- char name[255];
-
- if (fd < 0) {
- if (errno != EACCES) {
- error << string_compose ("Unable to open \"%1\": %2", dev, strerror(errno)) << endmsg;
- }
- return -1;
- }
-
- /* placate valgrind */
- name[0] = '\0';
-
- if (ioctl (fd, EVIOCGNAME (sizeof(name)), name) < 0) {
- error << string_compose ("\"%1\": EVIOCGNAME failed: %2", dev, strerror(errno)) << endmsg;
- close (fd);
- return -1;
- }
-
- // it's the correct device if the prefix matches what we expect it to be:
- for (i = 0; i < NUM_VALID_PREFIXES; ++i) {
- if (!strncasecmp (name, valid_prefix[i], strlen (valid_prefix[i]))) {
- return fd;
- }
- }
-
- close (fd);
- return -1;
-}
-
-int find_powermate(int mode)
-{
- char devname[256];
- int i, r;
-
- for (i = 0; i < NUM_EVENT_DEVICES; i++) {
- sprintf (devname, "/dev/input/event%d", i);
- r = open_powermate (devname, mode);
- if (r >= 0) {
- return r;
- }
- }
-
- return -1;
-}
-
-PowermateControlProtocol::PowermateControlProtocol (Session& s)
- : ControlProtocol (s, "powermate")
-{
-}
-
-PowermateControlProtocol::~PowermateControlProtocol ()
-{
- set_active (false);
-}
-
-bool
-PowermateControlProtocol::probe ()
-{
- int port = find_powermate( O_RDONLY );
-
- if (port < 0) {
- if (errno == ENOENT) {
- DEBUG_TRACE (DEBUG::ControlProtocols, "Powermate device not found; perhaps you have no powermate connected");
- } else {
- DEBUG_TRACE (DEBUG::ControlProtocols, string_compose ("powermate: Opening of powermate failed - %1\n", strerror(errno)));
- }
- return false;
- }
-
- close (port);
- return true;
-}
-
-int
-PowermateControlProtocol::set_active (bool inActivate)
-{
- if (inActivate != _active) {
-
- if (inActivate) {
-
- mPort = find_powermate(O_RDONLY);
-
- if ( mPort < 0 ) {
- return -1;
- }
-
- if (pthread_create_and_store ("Powermate", &mThread, SerialThreadEntry, this) == 0) {
- _active = true;
- } else {
- return -1;
- }
-
- printf("Powermate Control Protocol activated\n");
-
- } else {
- pthread_cancel (mThread);
- close (mPort);
- _active = false;
- printf("Powermate Control Protocol deactivated\n");
- }
- }
-
- return 0;
-}
-
-XMLNode&
-PowermateControlProtocol::get_state ()
-{
- XMLNode* node = new XMLNode (X_("Protocol"));
- node->add_property (X_("name"), _name);
- return *node;
-}
-
-int
-PowermateControlProtocol::set_state (const XMLNode& /*node*/, int /*version*/)
-{
- return 0;
-}
-
-
-void*
-PowermateControlProtocol::SerialThreadEntry (void* arg)
-{
- static_cast<PowermateControlProtocol*>(arg)->register_thread ("Powermate");
- return static_cast<PowermateControlProtocol*>(arg)->SerialThread ();
-}
-
-#define BUFFER_SIZE 32
-
-bool held = false;
-bool skippingMarkers = false;
-
-void
-PowermateControlProtocol::ProcessEvent(struct input_event *ev)
-{
-#ifdef VERBOSE
- fprintf(stderr, "type=0x%04x, code=0x%04x, value=%d\n",
- ev->type, ev->code, (int)ev->value);
-#endif
-
- switch(ev->type){
- case EV_MSC:
- printf("The LED pulse settings were changed; code=0x%04x, value=0x%08x\n", ev->code, ev->value);
- break;
- case EV_REL:
- if(ev->code != REL_DIAL)
- fprintf(stderr, "Warning: unexpected rotation event; ev->code = 0x%04x\n", ev->code);
- else{
- if (held) {
- //click and hold to skip forward and back by markers
- skippingMarkers = true;;
- if (ev->value > 0)
- next_marker();
- else
- prev_marker();
- } else {
- //scale the range so that we can go from +/-8x within 180 degrees, with less precision at the higher speeds
- float speed = get_transport_speed();
- speed += (float)ev->value * 0.05;
- if (speed > 1.5 || speed < -1.5 )
- speed += ev->value;
- set_transport_speed( speed );
- }
- }
- break;
- case EV_KEY:
- if(ev->code != BTN_0)
- fprintf(stderr, "Warning: unexpected key event; ev->code = 0x%04x\n", ev->code);
- else
- if (ev->value)
- held = true;
- else {
- held = false;
- if (skippingMarkers) {
- skippingMarkers = false;
- } else {
- if (get_transport_speed() == 0.0) {
- set_transport_speed(1.0);
- } else {
- set_transport_speed(0.0);
- }
- }
- }
- break;
- }
-
- fflush(stdout);
-}
-
-void*
-PowermateControlProtocol::SerialThread ()
-{
- struct input_event ibuffer[BUFFER_SIZE];
- int r, events, i;
-
- while(1){
- r = read(mPort, ibuffer, sizeof(struct input_event) * BUFFER_SIZE);
- if( r > 0 ){
- events = r / sizeof(struct input_event);
- for(i=0; i<events; i++)
- ProcessEvent(&ibuffer[i]);
- }else{
- fprintf(stderr, "read() failed: %s\n", strerror(errno));
- return (void*) 0;
- }
- }
-
- return (void*) 0;
-}
-
-
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