testing playing .wav files. lol sounds

src/interface.c

@@ -3866,7 +3866,7 @@ char *console_ui(pixel *vid_buf,char error[255]) { //TODO: error messages, show
 		clearrect(vid_buf, 0, 0, XRES+BARSIZE, 220);//anyway to make it transparent?
 		draw_line(vid_buf, 1, 219, XRES, 219, 228, 228, 228, XRES+BARSIZE);
 		drawtext(vid_buf, 100, 15, "Welcome to The Powder Toy console v.2 (by cracker64)\n"
-					  "Current commands are quit, set, reset, load, create, file, kill\n"
+					  "Current commands are quit, set, reset, load, create, file, kill, sound\n"
 					  "You can set type, temp, ctype, life, x, y, vx, vy using this format ('set life particle# 9001')\n"
 					  "You can also use 'all' instead of a particle number to do it to everything.\n"
 					  "You can now use particle names (ex. set type all deut)\n"
@@ -3875,6 +3875,7 @@ char *console_ui(pixel *vid_buf,char error[255]) { //TODO: error messages, show
 					  "Create particles with 'create deut x,y' where x and y are the coords\n"
 					  "Run scripts from file 'file filename'\n"
 					  "You can delete/kill a particle with 'kill x,y'"
+					  "Play a sound with (sound blah.wav)"
 					  ,255, 187, 187, 255);
 		
 		cc = 0;

src/main.c

@@ -28,6 +28,7 @@
 #include <string.h>
 #include <math.h>
 #include <SDL/SDL.h>
+#include <SDL/SDL_audio.h>
 #include <bzlib.h>
 #include <time.h>
 
@@ -51,6 +52,69 @@
 #include <air.h>
 #include <icon.h>
 
+#define NUM_SOUNDS 2
+struct sample {
+    Uint8 *data;
+    Uint32 dpos;
+    Uint32 dlen;
+} sounds[NUM_SOUNDS];
+
+void mixaudio(void *unused, Uint8 *stream, int len)
+{
+    int i;
+    Uint32 amount;
+
+    for ( i=0; i<NUM_SOUNDS; ++i ) {
+        amount = (sounds[i].dlen-sounds[i].dpos);
+        if ( amount > len ) {
+            amount = len;
+        }
+        SDL_MixAudio(stream, &sounds[i].data[sounds[i].dpos], amount, SDL_MIX_MAXVOLUME);
+        sounds[i].dpos += amount;
+    }
+}
+
+void PlaySound(char *file)
+{
+    int index;
+    SDL_AudioSpec wave;
+    Uint8 *data;
+    Uint32 dlen;
+    SDL_AudioCVT cvt;
+
+    /* Look for an empty (or finished) sound slot */
+    for ( index=0; index<NUM_SOUNDS; ++index ) {
+        if ( sounds[index].dpos == sounds[index].dlen ) {
+            break;
+        }
+    }
+    if ( index == NUM_SOUNDS )
+        return;
+
+    /* Load the sound file and convert it to 16-bit stereo at 22kHz */
+    if ( SDL_LoadWAV(file, &wave, &data, &dlen) == NULL ) {
+        fprintf(stderr, "Couldn't load %s: %s\n", file, SDL_GetError());
+        return;
+    }
+    SDL_BuildAudioCVT(&cvt, wave.format, wave.channels, wave.freq,
+                            AUDIO_S16,   2,             22050);
+    cvt.buf = malloc(dlen*cvt.len_mult);
+    memcpy(cvt.buf, data, dlen);
+    cvt.len = dlen;
+    SDL_ConvertAudio(&cvt);
+    SDL_FreeWAV(data);
+
+    /* Put the sound data in the slot (it starts playing immediately) */
+    if ( sounds[index].data ) {
+        free(sounds[index].data);
+    }
+    SDL_LockAudio();
+    sounds[index].data = cvt.buf;
+    sounds[index].dlen = cvt.len_cvt;
+    sounds[index].dpos = 0;
+    SDL_UnlockAudio();
+}
+
 static const char *it_msg =
     "\brThe Powder Toy - http://powdertoy.co.uk/\n"
     "\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\n"
@@ -1136,6 +1200,21 @@ int main(int argc, char *argv[])
 	int save_mode=0, save_x=0, save_y=0, save_w=0, save_h=0, copy_mode=0;
 	GSPEED = 1;
 	
+	SDL_AudioSpec fmt;
+	/* Set 16-bit stereo audio at 22Khz */
+	fmt.freq = 22050;
+	fmt.format = AUDIO_S16;
+	fmt.channels = 2;
+	fmt.samples = 512;
+	fmt.callback = mixaudio;
+	fmt.userdata = NULL;
+	/* Open the audio device and start playing sound! */
+	if ( SDL_OpenAudio(&fmt, NULL) < 0 )
+	{
+		fprintf(stderr, "Unable to open audio: %s\n", SDL_GetError());
+		exit(1);
+	}
+	SDL_PauseAudio(0);
 #ifdef MT
 	numCores = core_count();
 #endif
@@ -2303,7 +2382,6 @@ int main(int argc, char *argv[])
 								cb_bmap[cby][cbx] = bmap[cby][cbx];
 								cb_emap[cby][cbx] = emap[cby][cbx];
 							}
-
 						create_parts(x, y, bsx, bsy, c);
 						lx = x;
 						ly = y;
@@ -2547,7 +2625,7 @@ int main(int argc, char *argv[])
 		}
 
 	}
-
+	SDL_CloseAudio();
 	http_done();
 	return 0;
 }
@@ -2595,6 +2673,10 @@ char *console5;
 			else
 				sprintf(console_error, "%s does not exist", console3);
 		}
+		else if(strcmp(console2, "sound")==0 && console3)
+		{
+			PlaySound(console3);
+		}
 		else if(strcmp(console2, "load")==0 && console3)
 		{
 			j = atoi(console3);