[outputs] new output: RCP/Roku/SoundBridge devices

Roku SoundBridge devices can be treated as dumb speakers; they offer a
texted based protocol, RCP, that allows the server to request the Roku
device to connect to the server's stream.mp3 and provides ability to
control volume

Roku devices appear as speakers automatically via mDNS announcements on
the server _roku-rcp._tcp

src/Makefile.am

@@ -125,7 +125,7 @@ owntone_SOURCES = main.c \
 	outputs/rtp_common.h outputs/rtp_common.c \
 	outputs/raop.c outputs/airplay.c $(PAIR_AP_SRC) \
 	outputs/airplay_events.c outputs/airplay_events.h \
-	outputs/streaming.c outputs/dummy.c outputs/fifo.c \
+	outputs/streaming.c outputs/dummy.c outputs/fifo.c outputs/rcp.c \
 	$(ALSA_SRC) $(PULSEAUDIO_SRC) $(CHROMECAST_SRC) \
 	evrtsp/rtsp.c evrtsp/evrtsp.h evrtsp/rtsp-internal.h evrtsp/log.h \
 	$(SPOTIFY_SRC) $(LIBRESPOTC_SRC) $(LIBSPOTIFY_SRC) \

src/conffile.c

@@ -186,6 +186,14 @@ static cfg_opt_t sec_fifo[] =
     CFG_END()
   };
 
+/* RCP/Soundbridge section structure */
+static cfg_opt_t sec_rcp[] =
+  {
+    CFG_BOOL("exclude", cfg_false, CFGF_NONE),
+    CFG_BOOL("clear_on_close", cfg_false, CFGF_NONE),
+    CFG_END()
+  };
+
 /* Spotify section structure */
 static cfg_opt_t sec_spotify[] =
   {
@@ -243,6 +251,7 @@ static cfg_opt_t toplvl_cfg[] =
     CFG_SEC("airplay", sec_airplay, CFGF_MULTI | CFGF_TITLE),
     CFG_SEC("chromecast", sec_chromecast, CFGF_MULTI | CFGF_TITLE),
     CFG_SEC("fifo", sec_fifo, CFGF_NONE),
+    CFG_SEC("rcp", sec_rcp, CFGF_MULTI | CFGF_TITLE),
     CFG_SEC("spotify", sec_spotify, CFGF_NONE),
     CFG_SEC("sqlite", sec_sqlite, CFGF_NONE),
     CFG_SEC("mpd", sec_mpd, CFGF_NONE),

src/logger.c

@@ -58,7 +58,7 @@ static uint32_t logger_repeat_counter;
 static uint32_t logger_last_hash;
 static char *logfilename;
 static FILE *logfile;
-static char *labels[] = { "config", "daap", "db", "httpd", "http", "main", "mdns", "misc", "rsp", "scan", "xcode", "event", "remote", "dacp", "ffmpeg", "artwork", "player", "raop", "laudio", "dmap", "dbperf", "spotify", "lastfm", "cache", "mpd", "stream", "cast", "fifo", "lib", "web", "airplay" };
+static char *labels[] = { "config", "daap", "db", "httpd", "http", "main", "mdns", "misc", "rsp", "scan", "xcode", "event", "remote", "dacp", "ffmpeg", "artwork", "player", "raop", "laudio", "dmap", "dbperf", "spotify", "lastfm", "cache", "mpd", "stream", "cast", "fifo", "lib", "web", "airplay", "rcp" };
 static char *severities[] = { "FATAL", "LOG", "WARN", "INFO", "DEBUG", "SPAM" };
 
 

src/logger.h

@@ -37,8 +37,9 @@
 #define L_LIB         28
 #define L_WEB         29
 #define L_AIRPLAY     30
+#define L_RCP         31
 
-#define N_LOGDOMAINS  31
+#define N_LOGDOMAINS  32
 
 /* Severities */
 #define E_FATAL   0

src/outputs.c

@@ -44,6 +44,7 @@ extern struct output_definition output_airplay;
 extern struct output_definition output_streaming;
 extern struct output_definition output_dummy;
 extern struct output_definition output_fifo;
+extern struct output_definition output_rcp;
 #ifdef HAVE_ALSA
 extern struct output_definition output_alsa;
 #endif
@@ -64,6 +65,7 @@ static struct output_definition *outputs[] = {
     &output_streaming,
     &output_dummy,
     &output_fifo,
+    &output_rcp,
 #ifdef HAVE_ALSA
     &output_alsa,
 #endif

src/outputs.h

@@ -63,6 +63,7 @@ enum output_types
   OUTPUT_TYPE_STREAMING,
   OUTPUT_TYPE_DUMMY,
   OUTPUT_TYPE_FIFO,
+  OUTPUT_TYPE_RCP,
 #ifdef HAVE_ALSA
   OUTPUT_TYPE_ALSA,
 #endif