Add optional rich presence launch announcements

Makefile

@@ -73,7 +73,7 @@ endif
 
 FRONTEND_OBJS = pad.o xparam.o fntsys.o renderman.o menusys.o OSDHistory.o system.o lang.o lang_internal.o config.o hdd.o dialogs.o \
 		dia.o ioman.o texcache.o themes.o supportbase.o bdmsupport.o ethsupport.o hddsupport.o zso.o lz4.o \
-		appsupport.o gui.o guigame.o vmc_groups.o textures.o opl.o atlas.o nbns.o httpclient.o gsm.o cheatman.o sound.o ps2cnf.o
+		appsupport.o gui.o guigame.o vmc_groups.o textures.o opl.o atlas.o nbns.o httpclient.o gsm.o cheatman.o sound.o ps2cnf.o announce.o
 
 IOP_OBJS =	iomanx.o filexio.o ps2fs.o usbd.o bdmevent.o \
 		bdm.o bdmfs_fatfs.o usbmass_bd.o iLinkman.o IEEE1394_bd.o mx4sio_bd.o \

include/announce.h

@@ -0,0 +1,8 @@
+#ifndef __ANNOUNCE_H
+#define __ANNOUNCE_H
+
+// Broadcasts a PS2RichPresence LAUNCH packet over UDP so companion apps on the LAN can react to the game being started (e.g. Discord rich presence).
+// Packet spec: https://github.com/brkzlr/PS2RichPresence/blob/master/protocol/ps2rp_protocol.h
+void announceGameLaunch(const char *titleId, const char *displayName);
+
+#endif

include/config.h

@@ -111,6 +111,7 @@ enum CONFIG_INDEX {
 #define CONFIG_OPL_DEFAULT_BGM_PATH     "default_bgm_path"
 #define CONFIG_OPL_XSENSITIVITY         "x_sensitivity"
 #define CONFIG_OPL_YSENSITIVITY         "y_sensitivity"
+#define CONFIG_OPL_ANNOUNCE_GAMES       "announce_games"
 
 // Network config keys
 #define CONFIG_NET_ETH_LINKM          "eth_linkmode"

include/opl.h

@@ -197,6 +197,9 @@ extern char gETHPrefix[32];
 
 extern int gRememberLastPlayed;
 
+// Announce game launches over the network (PS2RichPresence protocol)
+extern int gEnableAnnounce;
+
 // Last Played Auto Start
 extern int KeyPressedOnce;
 extern int gAutoStartLastPlayed;

src/announce.c

@@ -0,0 +1,55 @@
+#include "include/opl.h"
+#include "include/announce.h"
+#include "include/ethsupport.h"
+
+// PS2RichPresence announce protocol, version 1.
+// The wire format is kept in sync with the spec at: https://github.com/brkzlr/PS2RichPresence/blob/master/protocol/ps2rp_protocol.h
+#define ANNOUNCE_PORT             50003
+#define ANNOUNCE_PROTOCOL_VERSION 1
+#define ANNOUNCE_HEADER_SIZE      20
+#define ANNOUNCE_TITLE_ID_SIZE    12
+#define ANNOUNCE_MAX_NAME_LENGTH  255
+#define ANNOUNCE_EVENT_LAUNCH     0
+#define ANNOUNCE_SOURCE_OPL       2
+
+void announceGameLaunch(const char *titleId, const char *displayName)
+{
+    u8 ip[4], netmask[4], gateway[4], broadcast[4];
+    u8 packet[ANNOUNCE_HEADER_SIZE + ANNOUNCE_MAX_NAME_LENGTH];
+    struct sockaddr_in addr;
+    int sock, nameLength, i;
+
+    if (!gEnableAnnounce)
+        return;
+
+    if (ethGetNetConfig(ip, netmask, gateway) < 0)
+        return;
+
+    memcpy(&packet[0], "PS2R", 4);
+    packet[4] = ANNOUNCE_PROTOCOL_VERSION;
+    packet[5] = ANNOUNCE_EVENT_LAUNCH;
+    packet[6] = ANNOUNCE_SOURCE_OPL;
+    nameLength = displayName ? strlen(displayName) : 0;
+    if (nameLength > ANNOUNCE_MAX_NAME_LENGTH)
+        nameLength = ANNOUNCE_MAX_NAME_LENGTH;
+    packet[7] = (u8)nameLength;
+    memset(&packet[8], 0, ANNOUNCE_TITLE_ID_SIZE);
+    if (titleId)
+        strncpy((char *)&packet[8], titleId, ANNOUNCE_TITLE_ID_SIZE - 1);
+    memcpy(&packet[ANNOUNCE_HEADER_SIZE], displayName, nameLength);
+
+    sock = socket(AF_INET, SOCK_DGRAM, 0);
+    if (sock < 0)
+        return;
+
+    for (i = 0; i < 4; i++)
+        broadcast[i] = ip[i] | ~netmask[i];
+
+    memset(&addr, 0, sizeof(addr));
+    addr.sin_family = AF_INET;
+    addr.sin_port = htons(ANNOUNCE_PORT);
+    addr.sin_addr.s_addr = broadcast[0] | (broadcast[1] << 8) | (broadcast[2] << 16) | ((u32)broadcast[3] << 24);
+
+    sendto(sock, packet, ANNOUNCE_HEADER_SIZE + nameLength, 0, (struct sockaddr *)&addr, sizeof(addr));
+    disconnect(sock);
+}

src/bdmsupport.c

@@ -10,6 +10,7 @@
 #include "include/system.h"
 #include "include/extern_irx.h"
 #include "include/cheatman.h"
+#include "include/announce.h"
 #include "include/sound.h"
 #include "modules/iopcore/common/cdvd_config.h"
 
@@ -540,6 +541,8 @@ void bdmLaunchGame(item_list_t *itemList, int id, config_set_t *configSet)
         settings->hddIsLBA48 = pDeviceData->bdmHddIsLBA48;
     }
 
+    announceGameLaunch(game->startup, game->name);
+
     if (gAutoLaunchBDMGame == NULL)
         deinit(NO_EXCEPTION, itemList->mode); // CAREFUL: deinit will call bdmCleanUp, so bdmGames/game will be freed
     else {

src/ethsupport.c

@@ -11,6 +11,7 @@
 #include "include/system.h"
 #include "include/extern_irx.h"
 #include "include/cheatman.h"
+#include "include/announce.h"
 #include "modules/iopcore/common/cdvd_config.h"
 
 #define NEWLIB_PORT_AWARE
@@ -703,6 +704,9 @@ static void ethLaunchGame(item_list_t *itemList, int id, config_set_t *configSet
 
     if (configGetStrCopy(configSet, CONFIG_ITEM_ALTSTARTUP, filename, sizeof(filename)) == 0)
         strcpy(filename, game->startup);
+
+    announceGameLaunch(game->startup, game->name);
+
     deinit(NO_EXCEPTION, ETH_MODE); // CAREFUL: deinit will call ethCleanUp, so ethGames/game will be freed
 
     settings->common.fakemodule_flags |= FAKE_MODULE_FLAG_DEV9;

src/hddsupport.c

@@ -11,6 +11,7 @@
 #include "include/system.h"
 #include "include/extern_irx.h"
 #include "include/cheatman.h"
+#include "include/announce.h"
 #include "modules/iopcore/common/cdvd_config.h"
 
 #define NEWLIB_PORT_AWARE
@@ -598,6 +599,8 @@ void hddLaunchGame(item_list_t *itemList, int id, config_set_t *configSet)
         }
     }
 
+    announceGameLaunch(game->startup, game->name);
+
     if (gAutoLaunchGame == NULL)
         deinit(NO_EXCEPTION, HDD_MODE); // CAREFUL: deinit will call hddCleanUp, so hddGames/game will be freed
     else {

src/opl.c

@@ -173,6 +173,7 @@ int gScrollSpeed;
 char gExitPath[256];
 int gEnableDebug;
 int gPS2Logo;
+int gEnableAnnounce;
 int gDefaultDevice;
 int gEnableWrite;
 char gBDMPrefix[32];
@@ -963,6 +964,7 @@ static void _loadConfig()
             configGetInt(configOPL, CONFIG_OPL_BOOT_SND_VOLUME, &gBootSndVolume);
             configGetInt(configOPL, CONFIG_OPL_BGM_VOLUME, &gBGMVolume);
             configGetStrCopy(configOPL, CONFIG_OPL_DEFAULT_BGM_PATH, gDefaultBGMPath, sizeof(gDefaultBGMPath));
+            configGetInt(configOPL, CONFIG_OPL_ANNOUNCE_GAMES, &gEnableAnnounce);
         }
     }
 
@@ -1135,6 +1137,7 @@ static void _saveConfig()
         configSetStr(configOPL, CONFIG_OPL_DEFAULT_BGM_PATH, gDefaultBGMPath);
         configSetInt(configOPL, CONFIG_OPL_XSENSITIVITY, gXSensitivity);
         configSetInt(configOPL, CONFIG_OPL_YSENSITIVITY, gYSensitivity);
+        configSetInt(configOPL, CONFIG_OPL_ANNOUNCE_GAMES, gEnableAnnounce);
 
         configSetInt(configOPL, CONFIG_OPL_SWAP_SEL_BUTTON, gSelectButton == KEY_CIRCLE ? 0 : 1);
     }
@@ -1740,6 +1743,7 @@ static void setDefaults(void)
     gAutoRefresh = 0;
     gEnableDebug = 0;
     gPS2Logo = 0;
+    gEnableAnnounce = 0;
     gHDDGameListCache = 0;
     gEnableWrite = 0;
     gRememberLastPlayed = 0;
@@ -1898,6 +1902,7 @@ static void miniInit(int mode)
             config_set_t *configOPL = configGetByType(CONFIG_OPL);
 
             configGetInt(configOPL, CONFIG_OPL_PS2LOGO, &gPS2Logo);
+            configGetInt(configOPL, CONFIG_OPL_ANNOUNCE_GAMES, &gEnableAnnounce);
             configGetStrCopy(configOPL, CONFIG_OPL_EXIT_PATH, gExitPath, sizeof(gExitPath));
             configGetInt(configOPL, CONFIG_OPL_HDD_SPINDOWN, &gHDDSpindown);
             if (mode == BDM_MODE) {