[Add] Basic audio framework and some sounds. Give me another 30 mins and it will work. :)

bin/Makefile

@@ -42,7 +42,7 @@ endif
 DATA_AI   = $(shell find ../scripts/ai/ -name '*.lua')
 DATA_GFX  = $(shell find ../gfx/ -name '*.png')
 DATA_XML  = $(shell find ../dat/ -name '*.xml' -o -name '*.ttf')
-DATA_SND  = $(shell find ../snd/ -name '*.ogg')
+DATA_SND  = $(shell find ../snd/ -name '*.ogg' -o -name '*.wav')
 DATA = data
 DATAFILES = $(VERSIONFILE) $(DATA_AI) $(DATA_GFX) $(DATA_XML) $(DATA_SND)
 

dat/outfit.xml

@@ -37,6 +37,7 @@
 		</general>
     <specific type="6">
       <gfx>missile</gfx>
+			<sound>missile</sound>
       <duration>5</duration>
       <thrust>1200</thrust>
       <turn>200</turn>

dat/ship.xml

@@ -3,6 +3,7 @@
 	<ship name="Merchant Ship">
 		<GFX>ship</GFX>
     <GUI>minimal</GUI>
+		<sound>engine</sound>
 		<class>1</class>
 		<movement>
 			<thrust>320</thrust>
@@ -30,6 +31,7 @@
   <ship name = "Leapard">
     <GFX>leapard</GFX>
     <GUI>minimal</GUI>
+		<sound>engine</sound>
     <class>1</class>
     <movement>
       <thrust>400</thrust>
@@ -57,6 +59,7 @@
 	<ship name="Lancer">
 		<GFX>ship1</GFX>
     <GUI>minimal</GUI>
+		<sound>engine</sound>
 		<class>2</class>
 		<movement>
 			<thrust>180</thrust>

src/land.c

@@ -2,6 +2,7 @@
 #include "pause.h"
 #include "player.h"
 #include "rng.h"
+#include "music.h"
 #include "land.h"
 
 // Global/main window.
@@ -22,6 +23,9 @@
 #define COMMODITY_WIDTH   400
 #define COMMODITY_HEIGHT  400
 
+#define MUSIC_TAKEOFF		"liftoff"
+#define MUSIC_LAND			"agriculture"
+
 int landed = 0;
 
 static int land_wid = 0; // Primary land window.
@@ -97,6 +101,11 @@ static void news_close(char* str) {
 // Land the player.
 void land(Planet* p) {
   if(landed) return;
+
+	// Change music.
+	music_load(MUSIC_LAND);
+	music_play();
+
   planet = p;
   land_wid = window_create(p->name, -1, -1, LAND_WIDTH, LAND_HEIGHT);
 
@@ -139,6 +148,9 @@ void land(Planet* p) {
 void takeoff(void) {
   if(!landed) return;
 
+	music_load(MUSIC_TAKEOFF);
+	music_play();
+
   int sw, sh;
   sw = planet->gfx_space->w;
   sh = planet->gfx_space->h;

src/main.c

@@ -23,6 +23,8 @@
 #include "pause.h"
 #include "toolkit.h"
 #include "pilot.h"
+#include "sound.h"
+#include "music.h"
 
 #define XML_START_ID    "Start"
 #define START_DATA      "../dat/start.xml"
@@ -99,6 +101,11 @@ int main(int argc, char** argv) {
 
   window_caption();
 
+	// OpenAL sound.
+	if(sound_init()) WARN("Problem setting up sound!");
+	music_load("Machina");
+	music_play();
+
   // Input.
   if((indjoystick >= 0) || (namjoystick != NULL)) {
     if(joystick_init())
@@ -193,6 +200,8 @@ int main(int argc, char** argv) {
   joystick_exit();  // Release joystick.
   input_exit();     // Clean up keybindings.
   gl_exit();        // Kills video output.
+	sound_exit();			// Kills the sound.
+	SDL_Quit();				// Quits SDL.
   
   // All is good.
   exit(EXIT_SUCCESS);

src/music.c

@@ -0,0 +1,250 @@
+#include <AL/al.h>
+#include <AL/alc.h>
+#include <vorbis/vorbisfile.h>
+#include "SDL.h"
+
+#include "main.h"
+#include "log.h"
+#include "pack.h"
+#include "music.h"
+
+#define MUSIC_PLAYING			(2<<0)
+#define MUSIC_KILL				(9<<0)
+#define music_is(f)				(music_state 	& f)
+#define music_set(f)			(music_state |= f)
+#define music_rm(f)				(music_state ^= f)
+
+#define MUSIC_PREFIX			"../snd/music/"
+#define MUSIC_SUFFIX			".ogg"
+
+#define BUFFER_SIZE				(4096 * 8)
+
+// Saves the music to ram in this structure.
+typedef struct {
+	char name[32];	// Name.
+	Packfile file;
+	OggVorbis_File stream;
+	vorbis_info* info;
+	ALenum format;
+} alMusic;
+
+// Song currently playing.
+static SDL_mutex* music_vorbis_lock;
+static alMusic music_vorbis;
+static ALuint music_buffer[2];	// Front and back buffer.
+static ALuint music_source = 0;
+
+// What is available?
+static char** music_selection = NULL;
+static int nmusic_selection = 0;
+
+// Vorbis suff.
+static size_t ovpack_read(void* ptr, size_t size, size_t nmemb, void* datasource) {
+	return (ssize_t) pack_read(datasource, ptr, size*nmemb);
+}
+
+ov_callbacks ovcall = {
+	.read_func 	= ovpack_read,
+	.seek_func 	= NULL,
+	.close_func	= NULL,
+	.tell_func	= NULL
+};
+
+static int stream_loadBuffer(ALuint buffer);
+static int music_find(void);
+static int music_loadOGG(const char* filename);
+static void music_free(void);
+
+// The thread.
+static unsigned int music_state = 0;
+int music_thread(void* unused) {
+	(void)unused;
+
+	int active; // Active buffer.
+	ALint stat;
+
+	// Main loop.
+	while(!music_is(MUSIC_KILL)) {
+		if(music_is(MUSIC_PLAYING)) {
+			SDL_mutexP(music_vorbis_lock); // Lock the mutex.
+
+			// Start playing current song.
+			active = 0; // Load first buffer.
+			if(stream_loadBuffer(music_buffer[active])) music_rm(MUSIC_PLAYING);
+			alSourceQueueBuffers(music_source, 1, &music_buffer[active]);
+
+			// Start playing with the buffer loaded.
+			alSourcePlay(music_source);
+
+			active = 1; // Load second buffer.
+			if(stream_loadBuffer(music_buffer[active])) music_rm(MUSIC_PLAYING);
+			alSourceQueueBuffers(music_source, 1, &music_buffer[active]);
+
+			active = 0; // dive into the loop.
+			while(music_is(MUSIC_PLAYING)) {
+				alGetSourcei(music_source, AL_BUFFERS_PROCESSED, &stat);
+				if(stat > 0) {
+					// Refill active buffer.
+					alSourceUnqueueBuffers(music_source, 1, &music_buffer[active]);
+					if(stream_loadBuffer(music_buffer[active])) music_rm(MUSIC_PLAYING);
+					alSourceQueueBuffers(music_source, 1, &music_buffer[active]);
+
+					active = 1 - active;
+				}
+				SDL_Delay(0);
+			}
+			alSourceStop(music_source);
+			alSourceUnqueueBuffers(music_source, 2, music_buffer);
+
+			SDL_mutexV(music_vorbis_lock);
+		}
+		SDL_Delay(0); // We must not kill resources.
+	}
+	return 0;
+}
+
+static int stream_loadBuffer(ALuint buffer) {
+	int size, section, result;
+	char data[BUFFER_SIZE]; // Buffer to hold the data.
+
+	size = 0;
+	while(size < BUFFER_SIZE) {
+		// Fill up the entire data buffer.
+		result = ov_read(
+					&music_vorbis.stream,		// Stream.
+					data + size,						// Data.
+					BUFFER_SIZE - size,			// Amount to read.
+					0,											// Big endian?.
+					2,											// 16 bit.
+					1,											// Signed.
+					&section);							// Current bitstream.
+		
+		if(result == 0) return 1;
+
+		size += result;
+		if(size == BUFFER_SIZE) break; // Buffer is full.
+	}
+	alBufferData(buffer, AL_FORMAT_STEREO16, data, size, music_vorbis.info->rate);
+
+	return 0;
+}
+
+// Init/Exit.
+int music_init(void) {
+	music_vorbis_lock = SDL_CreateMutex();
+	music_find();
+	music_vorbis.file.fd = 0; // Indication that it's not loaded..
+	alGenBuffers(2, music_buffer);
+	alGenSources(1, &music_source);
+	alSourcef(music_source, AL_ROLLOFF_FACTOR, 0.);
+	alSourcei(music_source, AL_SOURCE_RELATIVE, AL_TRUE);
+	return 0;
+}
+
+void music_exit(void) {
+	int i;
+
+	// Free the music.
+	alDeleteBuffers(2, music_buffer);
+	alDeleteSources(1, &music_source);
+	music_free();
+
+	// Free selection
+	for(i = 0; i < nmusic_selection; i++)
+		free(music_selection[i]);
+	free(music_selection);
+}
+
+// Internal music loading ruitines.
+static int music_loadOGG(const char* filename) {
+	// Free currently loaded ogg.
+	music_free();
+
+	SDL_mutexP(music_vorbis_lock);
+
+	// Load the new ogg.
+	pack_open(&music_vorbis.file, DATA, filename);
+	ov_open_callbacks(&music_vorbis.file, &music_vorbis.stream, NULL, 0, ovcall);
+	music_vorbis.info = ov_info(&music_vorbis.stream, -1);
+
+	if(music_vorbis.info->channels == 1) music_vorbis.format = AL_FORMAT_MONO16;
+	else music_vorbis.format = AL_FORMAT_STEREO16;
+
+	SDL_mutexV(music_vorbis_lock);
+	return 0;
+}
+
+static int music_find(void) {
+	char** files;
+	uint32_t nfiles, i;
+	char tmp[64];
+	int len;
+
+	// Get the file list.
+	files = pack_listfiles(data, &nfiles);
+
+	// Load the profiles.
+	for(i = 0; i < nfiles; i++)
+		if((strncmp(files[i], MUSIC_PREFIX, strlen(MUSIC_PREFIX))==0) &&
+					(strncmp(files[i] + strlen(files[i]) - strlen(MUSIC_SUFFIX),
+					MUSIC_SUFFIX, strlen(MUSIC_SUFFIX))==0)) {
+			
+			// Grow the selection size.
+			music_selection = realloc(music_selection, ++nmusic_selection*sizeof(char*));
+
+			// Remove the prefix and suffix.
+			len = strlen(files[i]) - strlen(MUSIC_SUFFIX MUSIC_PREFIX);
+			strncpy(tmp, files[i]  + strlen(MUSIC_PREFIX), len);
+			tmp[len] = '\0';
+
+			music_selection[nmusic_selection-1] = strdup(tmp);
+		}
+	// Free the char* allocated by pack.
+	for(i = 0; i < nfiles; i++)
+		free(files[i]);
+	free(files);
+
+	DEBUG("Loaded %d song%c", nmusic_selection, (nmusic_selection==1)?' ':'s');
+
+	return 0;
+}
+
+static void music_free(void) {
+	SDL_mutexP(music_vorbis_lock);
+
+	if(music_vorbis.file.fd != 0) {
+		ov_clear(&music_vorbis.stream);
+		pack_close(&music_vorbis.file);
+	}
+
+	SDL_mutexV(music_vorbis_lock);
+}
+
+// Music control functions.
+void music_load(const char* name) {
+	int i;
+	char tmp[64];
+
+	music_stop();
+
+	for(i = 0; i < nmusic_selection; i++)
+		if(strcmp(music_selection[i], name)==0) {
+			snprintf(tmp, 64, MUSIC_PREFIX"%s"MUSIC_SUFFIX, name);
+			music_loadOGG(tmp);
+			return;
+		}
+	WARN("Requested load song '%s' but it can't be found in the music stack", name);
+}
+
+void music_play(void) {
+	music_set(MUSIC_PLAYING);
+}
+
+void music_stop(void) {
+	music_rm(MUSIC_PLAYING);
+}
+
+void music_kill(void) {
+	music_set(MUSIC_KILL);
+}
+

src/music.h

@@ -0,0 +1,15 @@
+#pragma once
+
+// Thread.
+int music_thread(void* unused);
+void music_kill(void);
+
+// Init/Exit.
+int music_init(void);
+void music_exit(void);
+
+// Music control.
+void music_load(const char* name);
+void music_play(void);
+void music_stop(void);
+

src/opengl.c

@@ -532,8 +532,7 @@ int gl_init(void) {
 
 // Clean up our mess.
 void gl_exit(void) {
-  //SDL_ShowCursor(SDL_ENABLE);
-  SDL_Quit();
+
 }
 
 // Saves a png.

src/player.c

@@ -11,6 +11,7 @@
 #include "rng.h"
 #include "land.h"
 #include "toolkit.h"
+#include "sound.h"
 #include "player.h"
 
 #define XML_GUI_ID    "GUIs" // XML section identifier.

src/sound.c

@@ -0,0 +1,102 @@
+#include <sys/stat.h>
+#include <AL/alc.h>
+#include "SDL.h"
+#include "SDL_thread.h"
+
+#include "main.h"
+#include "log.h"
+#include "pack.h"
+#include "music.h"
+#include "sound.h"
+
+// This isn't always set?
+#ifndef AL_FORMAT_VORBIS_EXT
+#define AL_FORMAT_VORBIS_EXT 0x10003
+#endif
+
+typedef struct {
+	ALfloat x, y;
+} alVector;
+
+static ALCcontext* al_context = NULL;
+static ALCdevice* al_device = NULL;
+
+static SDL_Thread* music_player = NULL;
+
+int sound_init(void) {
+	// Open the default device.
+	al_device = alcOpenDevice(NULL);
+	if(al_device == NULL) {
+		WARN("Unable to open default sound device");
+		return -1;
+	}
+
+	// Create the OpenAL context.
+	al_context = alcCreateContext(al_device, NULL);
+	if(al_context == NULL) {
+		WARN("Unable to create OpenAL context");
+		return -2;
+	}
+
+	// We use the vorbis extension for AL to load it easily.
+	if(alIsExtensionPresent("AL_EXT_vorbis") == AL_FALSE) {
+		WARN("AL_EXT_vorbis not available in OpenAL context!");
+		return -3;
+	}
+
+	// Set active context.
+	if(alcMakeContextCurrent(al_context)==AL_FALSE) {
+		WARN("Failure to set default context");
+		return -4;
+	}
+
+	music_init();
+	music_player = SDL_CreateThread(music_thread, NULL);
+
+	return 0;
+}
+
+
+// Clean up after the sound system.
+void sound_exit(void) {
+	music_stop();
+	music_kill();
+	SDL_WaitThread(music_player, NULL);
+	music_exit();
+
+	if(al_context) {
+		alcMakeContextCurrent(NULL);
+		alcDestroyContext(al_context);
+	}
+	if(al_device) alcCloseDevice(al_device);
+}
+
+// Loads a vorbis file.
+ALuint sound_sndCreate(char* filename) {
+	void* ovdata;
+	unsigned int size;
+	ALenum err;
+	ALuint buf;
+
+	// Get the file data buffer from the packfile.
+	ovdata = pack_readfile(DATA, filename, &size);
+
+	// Bind to OpenAL buffer.
+	alGenBuffers(1, &buf);
+	alBufferData(buf, AL_FORMAT_VORBIS_EXT, ovdata, size, 44800);
+
+	// Errors?
+	if((err = alGetError()) != AL_NO_ERROR) {
+		WARN("OpenAL erro '%d' loading sound '%s'.", err, filename);
+		return 0;
+	}
+
+	// Finish up.
+	free(ovdata);
+	return buf;
+}
+
+void sound_sndFree(const ALuint snd) {
+	alDeleteBuffers(1, &snd);
+}
+

src/sound.h

@@ -0,0 +1,16 @@
+#pragma once
+#include <AL/al.h>
+#include "physics.h"
+
+// Sound subsystem.
+int sound_init(void);
+void sound_exit(void);
+
+// Sound manupulation functions.
+ALuint sound_sndCreate(char* filename);
+void sound_sndFree(const ALuint snd);
+
+// Source manipulation function.
+#define sound_initSource(s)		(alGenSources(1, &(s)))
+#define sound_delSource(s)		(alDeleteSources(1, &(s))
+