forked from oneman/XMMS2-Gnome-Media-Keys-Listener
/
xmms2-gnome-mediakeys-listener.c
277 lines (210 loc) · 6.29 KB
/
xmms2-gnome-mediakeys-listener.c
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/*
xmms2-gnome-mediakeys-listener.c
this xmms2 client connects to the gnome settings daemon
which broadcast out a dbus signal when those prev, play/pause, next keys are hit on your keyboard
this listens for those signals and tells xmms2 to do something the client lib
now uses the xmms2 client lib
2010 rawdod / oneman / drr
to compile do it like this:
gcc -Wall -g -ldbus-1 -I/usr/include/dbus-1.0 -I/usr/lib/dbus-1.0/include -I/usr/local/include/xmms2 -L/usr/local/lib -lxmmsclient -o xmms2-gnome-mediakeys-listener xmms2-gnome-mediakeys-listener.c
*/
#include <dbus/dbus.h>
#include <stdbool.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <xmmsclient/xmmsclient.h>
void cmd_toggleplay (xmmsc_connection_t *conn);
void cmd_play (xmmsc_connection_t *conn);
void cmd_stop (xmmsc_connection_t *conn);
void cmd_pause (xmmsc_connection_t *conn);
void cmd_next (xmmsc_connection_t *conn);
void cmd_prev (xmmsc_connection_t *conn);
void cmd_jump (xmmsc_connection_t *conn);
xmmsc_connection_t *connection;
xmmsc_result_t *result;
xmmsv_t *return_value;
const char *err_buf;
static void
do_reljump (xmmsc_connection_t *conn, int where)
{
xmmsc_result_t *res;
xmmsv_t *val;
const char *errmsg;
res = xmmsc_playlist_set_next_rel (conn, where);
xmmsc_result_wait (res);
val = xmmsc_result_get_value (res);
if (xmmsv_get_error (val, &errmsg)) {
//print_error ("Couldn't advance in playlist: %s", errmsg);
}
xmmsc_result_unref (res);
res = xmmsc_playback_tickle (conn);
xmmsc_result_wait (res);
val = xmmsc_result_get_value (res);
if (xmmsv_get_error (val, &errmsg)) {
//print_error ("%s", errmsg);
}
xmmsc_result_unref (res);
}
void
cmd_toggleplay (xmmsc_connection_t *conn)
{
int32_t status;
xmmsc_result_t *res;
xmmsv_t *val;
const char *errmsg;
res = xmmsc_playback_status (conn);
xmmsc_result_wait (res);
val = xmmsc_result_get_value (res);
if (xmmsv_get_error (val, &errmsg)) {
//print_error ("Couldn't get playback status: %s", errmsg);
}
if (!xmmsv_get_int (val, &status)) {
//print_error ("Broken resultset");
}
if (status == XMMS_PLAYBACK_STATUS_PLAY) {
cmd_pause (conn);
} else {
cmd_play (conn);
}
xmmsc_result_unref (res);
}
void
cmd_play (xmmsc_connection_t *conn)
{
xmmsc_result_t *res;
xmmsv_t *val;
const char *errmsg;
res = xmmsc_playback_start (conn);
xmmsc_result_wait (res);
val = xmmsc_result_get_value (res);
if (xmmsv_get_error (val, &errmsg)) {
// print_error ("Couldn't start playback: %s", errmsg);
}
xmmsc_result_unref (res);
}
void
cmd_stop (xmmsc_connection_t *conn)
{
xmmsc_result_t *res;
xmmsv_t *val;
const char *errmsg;
res = xmmsc_playback_stop (conn);
xmmsc_result_wait (res);
val = xmmsc_result_get_value (res);
if (xmmsv_get_error (val, &errmsg)) {
//print_error ("Couldn't stop playback: %s", errmsg);
}
xmmsc_result_unref (res);
}
void
cmd_pause (xmmsc_connection_t *conn)
{
xmmsc_result_t *res;
xmmsv_t *val;
const char *errmsg;
res = xmmsc_playback_pause (conn);
xmmsc_result_wait (res);
val = xmmsc_result_get_value (res);
if (xmmsv_get_error (val, &errmsg)) {
//print_error ("Couldn't pause playback: %s", errmsg);
}
xmmsc_result_unref (res);
}
void handle_signal(char *command) {
/* printf("%s\n", command); */
if (strcmp("Next", command) == 0) {
do_reljump (connection, 1);
}
if (strcmp("Previous", command) == 0) {
do_reljump (connection, -1);
}
if (strcmp("Play", command) == 0) {
cmd_toggleplay(connection );
}
}
/**
* Listens for signals on the bus
*/
void receive()
{
DBusMessage* msg;
DBusMessageIter args;
DBusConnection* conn;
DBusError err;
int ret;
char* sigvalue;
printf("Listening for signals from gnome settings daemon :D \n");
// initialise the errors
dbus_error_init(&err);
// connect to the bus and check for errors
conn = dbus_bus_get(DBUS_BUS_SESSION, &err);
if (dbus_error_is_set(&err)) {
fprintf(stderr, "Connection Error (%s)\n", err.message);
dbus_error_free(&err);
}
if (NULL == conn) {
exit(1);
}
// request our name on the bus and check for errors
ret = dbus_bus_request_name(conn, "test.signal.sink", DBUS_NAME_FLAG_REPLACE_EXISTING , &err);
if (dbus_error_is_set(&err)) {
fprintf(stderr, "Name Error (%s)\n", err.message);
dbus_error_free(&err);
}
if (DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER != ret) {
exit(1);
}
// add a rule for which messages we want to see
dbus_bus_add_match(conn, "type='signal',interface='org.gnome.SettingsDaemon.MediaKeys'", &err); // see signals from the given interface
dbus_connection_flush(conn);
if (dbus_error_is_set(&err)) {
fprintf(stderr, "Match Error (%s)\n", err.message);
exit(1);
}
//printf("Match rule sent\n");
// loop listening for signals being emmitted
while (true) {
// non blocking read of the next available message
dbus_connection_read_write(conn, 0);
msg = dbus_connection_pop_message(conn);
// loop again if we haven't read a message
if (NULL == msg) {
usleep(250000);
continue;
}
// check if the message is a signal from the correct interface and with the correct name
if (dbus_message_is_signal(msg, "org.gnome.SettingsDaemon.MediaKeys", "MediaPlayerKeyPressed")) {
// read the parameters
if (!dbus_message_iter_init(msg, &args))
fprintf(stderr, "Message Has No Parameters\n");
else if (DBUS_TYPE_STRING != dbus_message_iter_get_arg_type(&args))
fprintf(stderr, "Argument is not string!\n");
else
/* gnome sends out two strings banshee-1 and then the command for whatever reason */
dbus_message_iter_get_basic(&args, &sigvalue);
handle_signal(sigvalue);
dbus_message_iter_next(&args);
dbus_message_iter_get_basic(&args, &sigvalue);
handle_signal(sigvalue);
}
// free the message
dbus_message_unref(msg);
}
}
int main()
{
connection = xmmsc_init ("gnome-media-keys");
if (!connection) {
fprintf (stderr, "OOM!\n");
exit (EXIT_FAILURE);
}
if (!xmmsc_connect (connection, getenv ("XMMS_PATH"))) {
fprintf (stderr, "Connection failed: %s\n",
xmmsc_get_last_error (connection));
exit (EXIT_FAILURE);
}
receive();
return 0;
}