Add audio and text narration

Makefile

@@ -17,7 +17,7 @@ ifeq ($(GRAPHICS),YES)
 	sources += $(addprefix src/platform/,sdl2-platform.c)
 	cflags += $(shell $(SDL_CONFIG) --cflags)
 	cppflags += -DBROGUE_SDL
-	libs += $(shell $(SDL_CONFIG) --libs) -lSDL2_image
+	libs += $(shell $(SDL_CONFIG) --libs) -lSDL2_image -lespeak-ng
 endif
 
 ifeq ($(WEBBROGUE),YES)

src/brogue/MainMenu.c

@@ -344,6 +344,8 @@ void titleMenu() {
     initializeMenuFlames(true, colors, colorStorage, colorSources, flames, mask);
     rogue.creaturesWillFlashThisTurn = false; // total unconscionable hack
 
+    playSpeech("Welcome to Brogue!");
+
     do {
         if (isApplicationActive()) {
             // Revert the display.

src/brogue/Rogue.h

@@ -2683,6 +2683,7 @@ extern "C" {
     void notifyEvent(short eventId, int data1, int data2, const char *str1, const char *str2);
     boolean takeScreenshot();
     boolean setGraphicsEnabled(boolean);
+    void playSpeech(char *text);
     boolean controlKeyIsDown();
     boolean shiftKeyIsDown();
     short getHighScoresList(rogueHighScoresEntry returnList[HIGH_SCORES_COUNT]);

src/platform/platform.h

@@ -83,6 +83,8 @@ struct brogueConsole {
     very start of the program, even before .gameLoop, to set the initial value.
     */
     boolean (*setGraphicsEnabled)(boolean);
+
+    void (*playSpeech)();
 };
 
 // defined in platform

src/platform/platformdependent.c

@@ -234,6 +234,12 @@ boolean setGraphicsEnabled(boolean state) {
     }
 }
 
+void playSpeech(char *text) {
+    if (currentConsole.playSpeech) {
+        currentConsole.playSpeech(text);
+    }
+}
+
 // creates an empty high scores file
 void initScores() {
     short i;

src/platform/sdl2-platform.c

@@ -7,6 +7,7 @@
 
 #include <SDL.h>
 #include <SDL_image.h>
+#include <espeak-ng/speak_lib.h>
 
 #include "platform.h"
 
@@ -230,6 +231,16 @@ static char applyRemaps(char c) {
 }
 
 
+static boolean audioInit() {
+    return espeak_Initialize(AUDIO_OUTPUT_PLAYBACK, 0, NULL, 0) != -1;
+}
+
+
+static void _playSpeech(char *text) {
+    espeak_Synth(text, strlen(text), 0, 0, 0, espeakCHARS_UTF8, NULL, NULL);
+}
+
+
 /*
 If an event is available, returns true and updates returnEvent. Otherwise
 it returns false and an error event. This function also processes
@@ -366,6 +377,8 @@ static void _gameLoop() {
 
     if (!(IMG_Init(IMG_INIT_PNG) & IMG_INIT_PNG)) imgfatal();
 
+    audioInit();
+
     lastEvent.eventType = EVENT_ERROR;
 
     if (brogueFontSize == 0) {
@@ -559,5 +572,6 @@ struct brogueConsole sdlConsole = {
     _modifierHeld,
     NULL,
     _takeScreenshot,
-    _setGraphicsEnabled
+    _setGraphicsEnabled,
+    .playSpeech = _playSpeech
 };