src/sdlmixer/sound.c

   1 #include "glob.h"
   2 #include "sound.h"
   3 #include "music.h"
   4 #include "misc.h" // int2host
   5 #include "memory.h" // M_lock M_unlock
   6 #include "files.h" // F_findres
   7 #include "error.h"
   8
   9 #include "SDL.h"
  10 #include "SDL_mixer.h"
  11 #include <assert.h>
  12 #include <string.h>
  13
  14 #define TAG_MIX1 0x4d495831
  15
  16 #pragma pack(1)
  17 typedef struct dmi {
  18   Uint32 len;    // length [bytes]
  19   Uint32 rate;   // freq [Hz]
  20   Uint32 lstart; // loop start offset [bytes]
  21   Uint32 llen;   // loop length [bytes]
  22   Uint8 data[];  // sound data
  23 } dmi;
  24 #pragma pack()
  25
  26 typedef struct sdlmixer_snd {
  27   snd_t base;
  28   Mix_Chunk *c;
  29 } sdlmixer_snd;
  30
  31 static short snd_vol;
  32
  33 static int devfreq = MIX_DEFAULT_FREQUENCY;
  34 static Uint32 devformat = AUDIO_S16SYS; // MIX_DEFAULT_FORMAT
  35 static int devchannels = 1; // MIX_DEFAULT_CHANNELS;
  36 static int devchunksize = 1024;
  37 static int devchunkchannels = 8;
  38 static int devinit;
  39
  40 /* music */
  41
  42 const cfg_t *MUS_args (void) {
  43   return NULL;
  44 }
  45
  46 const cfg_t *MUS_conf (void) {
  47   return NULL;
  48 }
  49
  50 const menu_t *MUS_menu (void) {
  51   return NULL;
  52 }
  53
  54 void MUS_init (void) {
  55
  56 }
  57
  58 void MUS_done (void) {
  59
  60 }
  61
  62 void MUS_start (int time) {
  63
  64 }
  65
  66 void MUS_stop (void) {
  67
  68 }
  69
  70 void MUS_volume (int v) {
  71
  72 }
  73
  74 void MUS_load (char n[8]) {
  75
  76 }
  77
  78 void MUS_free (void) {
  79
  80 }
  81
  82 void MUS_update (void) {
  83
  84 }
  85
  86 /* Sound */
  87
  88 static int sound_menu_handler (menu_msg_t *msg, const menu_t *m, void *data, int i) {
  89   static int cur;
  90   enum { VOLUME, __NUM__ };
  91   static const simple_menu_t sm = {
  92     GM_BIG, "Sound", NULL,
  93     {
  94       { "Volume", NULL },
  95     }
  96   };
  97   if (i == VOLUME) {
  98     switch (msg->type) {
  99       case GM_GETENTRY: return GM_init_int0(msg, GM_SCROLLER, 0, 0, 0);
 100       case GM_GETINT: return GM_init_int(msg, snd_vol, 0, 128, 8);
 101       case GM_SETINT: S_volume(msg->integer.i); return 1;
 102     }
 103   }
 104   return simple_menu_handler(msg, i, __NUM__, &sm, &cur);
 105 }
 106
 107 const menu_t *S_menu (void) {
 108   static const menu_t m = { sound_menu_handler };
 109   return &m;
 110 }
 111
 112 const cfg_t *S_args (void) {
 113   static const cfg_t args[] = {
 114     { "sndvol", &snd_vol, Y_WORD },
 115     { NULL, NULL, 0 }
 116   };
 117   return args;
 118 }
 119
 120 const cfg_t *S_conf (void) {
 121   static const cfg_t conf[] = {
 122     { "sound_volume", &snd_vol, Y_WORD },
 123     { NULL, NULL, 0 }
 124   };
 125   return conf;
 126 }
 127
 128 void S_init (void) {
 129   assert(devinit == 0);
 130   logo("S_init: initialize sound\n");
 131   if (SDL_InitSubSystem(SDL_INIT_AUDIO) == 0) {
 132     if (Mix_OpenAudio(devfreq, devformat, devchannels, devchunksize) == 0) {
 133       Mix_AllocateChannels(devchunkchannels);
 134       devinit = 1;
 135     } else {
 136       logo("S_init: Mix_OpenAudio: %s\n", Mix_GetError());
 137       SDL_QuitSubSystem(SDL_INIT_AUDIO);
 138     }
 139   } else {
 140     logo("S_init: SDL_InitSubSytem: %s\n", SDL_GetError());
 141   }
 142 }
 143
 144 static Mix_Chunk *convert_this (int rate, int sign, const Uint8 *buf, int len) {
 145   SDL_AudioCVT cvt;
 146   Mix_Chunk *c = NULL;
 147   if (SDL_BuildAudioCVT(&cvt, sign ? AUDIO_S8 : AUDIO_U8, 1, rate, devformat, devchannels, devfreq) != -1) {
 148     int maxlen = len * cvt.len_mult;
 149     Uint8 *maxbuf = malloc(maxlen);
 150     if (maxbuf != NULL) {
 151       memcpy(maxbuf, buf, len);
 152       cvt.buf = maxbuf;
 153       cvt.len = len;
 154       if (SDL_ConvertAudio(&cvt) == 0) {
 155         c = malloc(sizeof(Mix_Chunk));
 156         if (c != NULL) {
 157           c->allocated = 0;
 158           c->abuf = maxbuf;
 159           c->alen = len * cvt.len_ratio;
 160           c->volume = MIX_MAX_VOLUME;
 161         } else {
 162           free(maxbuf);
 163         }
 164       } else {
 165         free(maxbuf);
 166       }
 167     }
 168   }
 169   return c;
 170 }
 171
 172 static sdlmixer_snd *new_sdlmixer_snd (const void *data, dword len, dword rate, dword lstart, dword llen, int sign) {
 173   Mix_Chunk *c = NULL;
 174   sdlmixer_snd *snd = NULL;
 175   c = convert_this(rate, sign, data, len);
 176   if (c != NULL) {
 177     snd = malloc(sizeof(sdlmixer_snd));
 178     if (snd != NULL) {
 179       snd->base.tag = TAG_MIX1;
 180       snd->c = c;
 181     } else {
 182       free(c->abuf);
 183       free(c);
 184     }
 185   }
 186   return snd;
 187 }
 188
 189 snd_t *S_get (int id) {
 190   void *handle;
 191   sdlmixer_snd *snd = NULL;
 192   if (devinit) {
 193     handle = M_lock(id);
 194     if (handle != NULL) {
 195       void *data = handle;
 196       dword len = F_getreslen(id);
 197       dword rate = 11025;
 198       dword lstart = 0;
 199       dword llen = 0;
 200       int sign = 0;
 201       if (len > 16) {
 202         dmi *hdr = handle;
 203         dword hdr_len = int2host(hdr->len);
 204         dword hdr_rate = int2host(hdr->rate);
 205         dword hdr_lstart = int2host(hdr->lstart);
 206         dword hdr_llen = int2host(hdr->llen);
 207         if (hdr_len <= len - 8 && hdr_lstart + hdr_llen <= len - 16) {
 208           data = hdr->data;
 209           len = hdr_len;
 210           rate = hdr_rate;
 211           lstart = hdr_lstart;
 212           llen = hdr_llen;
 213           sign = 1;
 214         }
 215       }
 216       snd = new_sdlmixer_snd(data, len, rate, lstart, llen, sign);
 217       M_unlock(handle);
 218     }
 219   }
 220   return (snd_t*)snd;
 221 }
 222
 223 snd_t *S_load (const char name[8]) {
 224   int id = F_findres(name);
 225   return S_get(id);
 226 }
 227
 228 void S_free (snd_t *s) {
 229   int i;
 230   sdlmixer_snd *snd = (sdlmixer_snd*)s;
 231   if (snd != NULL) {
 232     assert(snd->base.tag == TAG_MIX1);
 233     if (devinit) {
 234       for (i = 0; i < devchunkchannels; i++) {
 235         if (Mix_GetChunk(i) == snd->c) {
 236           Mix_HaltChannel(i);
 237         }
 238       }
 239     }
 240     free(snd->c->abuf);
 241     free(snd->c);
 242     free(snd);
 243   }
 244 }
 245
 246 short S_play (snd_t *s, short c, short v) {
 247   short channel = 0;
 248   sdlmixer_snd *snd = (sdlmixer_snd*)s;
 249   assert(c >= 0 && c <= 8);
 250   assert(v >= 0 && v <= 255);
 251   if (devinit && snd != NULL) {
 252     assert(snd->base.tag == TAG_MIX1);
 253     // TODO care about global volume level
 254     snd->c->volume = v * MIX_MAX_VOLUME / 255;
 255     channel = Mix_PlayChannel(c <= 0 ? -1 : c - 1, snd->c, 0);
 256     channel = channel == -1 ? 0 : channel + 1;
 257   }
 258   return channel;
 259 }
 260
 261 void S_stop (short c) {
 262   assert(c >= 0 && c <= 8);
 263   if (devinit && c > 0) {
 264     Mix_HaltChannel(c - 1);
 265   }
 266 }
 267
 268 void S_volume (int v) {
 269   snd_vol = min(max(v, 0), 128);
 270   if (devinit) {
 271     // TODO change relativelly for every channel
 272     Mix_Volume(-1, v * MIX_MAX_VOLUME / 128);
 273   }
 274 }
 275
 276 void S_wait (void) {
 277   if (devinit) {
 278     while (Mix_Playing(-1) > 0) {
 279       SDL_Delay(10);
 280     }
 281   }
 282 }
 283
 284 void S_done (void) {
 285   if (devinit) {
 286     // TODO free memory
 287     Mix_AllocateChannels(0);
 288     Mix_CloseAudio();
 289     SDL_QuitSubSystem(SDL_INIT_AUDIO);
 290   }
 291 }