src/sound.cpp

   1 /* $Id$ */
   2
   3 /*
   4  * This file is part of OpenTTD.
   5  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
   6  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   7  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
   8  */
   9
  10 /** @file sound.cpp Handling of playing sounds. */
  11
  12 #include "stdafx.h"
  13 #include "landscape.h"
  14 #include "mixer.h"
  15 #include "newgrf_sound.h"
  16 #include "fios.h"
  17 #include "window_gui.h"
  18 #include "vehicle_base.h"
  19 #include "base_media_func.h"
  20
  21 /* The type of set we're replacing */
  22 const char SoundsSet::set_type[] = "sounds";
  23
  24 const char SoundsSet::extension[] = ".obs"; // OpenTTD Base Sounds
  25
  26 static SoundEntry _original_sounds[ORIGINAL_SAMPLE_COUNT];
  27
  28 static void OpenBankFile(const char *filename)
  29 {
  30         memset(_original_sounds, 0, sizeof(_original_sounds));
  31
  32         /* If there is no sound file (nosound set), don't load anything */
  33         if (filename == NULL) return;
  34
  35         FioOpenFile(SOUND_SLOT, filename, BASESET_DIR);
  36         size_t pos = FioGetPos();
  37         uint count = FioReadDword();
  38
  39         /* The new format has the highest bit always set */
  40         bool new_format = HasBit(count, 31);
  41         ClrBit(count, 31);
  42         count /= 8;
  43
  44         /* Simple check for the correct number of original sounds. */
  45         if (count != ORIGINAL_SAMPLE_COUNT) {
  46                 /* Corrupt sample data? Just leave the allocated memory as those tell
  47                  * there is no sound to play (size = 0 due to calloc). Not allocating
  48                  * the memory disables valid NewGRFs that replace sounds. */
  49                 DEBUG(misc, 6, "Incorrect number of sounds in '%s', ignoring.", filename);
  50                 return;
  51         }
  52
  53         FioSeekTo(pos, SEEK_SET);
  54
  55         for (uint i = 0; i != ORIGINAL_SAMPLE_COUNT; i++) {
  56                 _original_sounds[i].file_slot = SOUND_SLOT;
  57                 _original_sounds[i].file_offset = GB(FioReadDword(), 0, 31) + pos;
  58                 _original_sounds[i].file_size = FioReadDword();
  59         }
  60
  61         for (uint i = 0; i != ORIGINAL_SAMPLE_COUNT; i++) {
  62                 SoundEntry *sound = &_original_sounds[i];
  63                 char name[255];
  64
  65                 FioSeekTo(sound->file_offset, SEEK_SET);
  66
  67                 /* Check for special case, see else case */
  68                 FioReadBlock(name, FioReadByte()); // Read the name of the sound
  69                 if (new_format || strcmp(name, "Corrupt sound") != 0) {
  70                         FioSeekTo(12, SEEK_CUR); // Skip past RIFF header
  71
  72                         /* Read riff tags */
  73                         for (;;) {
  74                                 uint32 tag = FioReadDword();
  75                                 uint32 size = FioReadDword();
  76
  77                                 if (tag == ' tmf') {
  78                                         FioReadWord(); // wFormatTag
  79                                         sound->channels = FioReadWord();        // wChannels
  80                                         sound->rate     = FioReadDword();       // samples per second
  81                                         if (!new_format) sound->rate = 11025;   // seems like all old samples should be played at this rate.
  82                                         FioReadDword();                         // avg bytes per second
  83                                         FioReadWord();                          // alignment
  84                                         sound->bits_per_sample = FioReadByte(); // bits per sample
  85                                         FioSeekTo(size - (2 + 2 + 4 + 4 + 2 + 1), SEEK_CUR);
  86                                 } else if (tag == 'atad') {
  87                                         sound->file_size = size;
  88                                         sound->file_slot = SOUND_SLOT;
  89                                         sound->file_offset = FioGetPos();
  90                                         break;
  91                                 } else {
  92                                         sound->file_size = 0;
  93                                         break;
  94                                 }
  95                         }
  96                 } else {
  97                         /*
  98                          * Special case for the jackhammer sound
  99                          * (name in sample.cat is "Corrupt sound")
 100                          * It's no RIFF file, but raw PCM data
 101                          */
 102                         sound->channels = 1;
 103                         sound->rate = 11025;
 104                         sound->bits_per_sample = 8;
 105                         sound->file_slot = SOUND_SLOT;
 106                         sound->file_offset = FioGetPos();
 107                 }
 108         }
 109 }
 110
 111 static bool SetBankSource(MixerChannel *mc, const SoundEntry *sound)
 112 {
 113         assert(sound != NULL);
 114
 115         /* Check for valid sound size. */
 116         if (sound->file_size == 0 || sound->file_size > ((size_t)-1) - 2) return false;
 117
 118         int8 *mem = xmalloct<int8>(sound->file_size + 2);
 119         /* Add two extra bytes so rate conversion can read these
 120          * without reading out of its input buffer. */
 121         mem[sound->file_size    ] = 0;
 122         mem[sound->file_size + 1] = 0;
 123
 124         FioSeekToFile(sound->file_slot, sound->file_offset);
 125         FioReadBlock(mem, sound->file_size);
 126
 127         /* 16-bit PCM WAV files should be signed by default */
 128         if (sound->bits_per_sample == 8) {
 129                 for (uint i = 0; i != sound->file_size; i++) {
 130                         mem[i] += -128; // Convert unsigned sound data to signed
 131                 }
 132         }
 133
 134 #if TTD_ENDIAN == TTD_BIG_ENDIAN
 135         if (sound->bits_per_sample == 16) {
 136                 uint num_samples = sound->file_size / 2;
 137                 int16 *samples = (int16 *)mem;
 138                 for (uint i = 0; i < num_samples; i++) {
 139                         samples[i] = BSWAP16(samples[i]);
 140                 }
 141         }
 142 #endif
 143
 144         assert(sound->bits_per_sample == 8 || sound->bits_per_sample == 16);
 145         assert(sound->channels == 1);
 146         assert(sound->file_size != 0 && sound->rate != 0);
 147
 148         MxSetChannelRawSrc(mc, mem, sound->file_size, sound->rate, sound->bits_per_sample == 16);
 149
 150         return true;
 151 }
 152
 153 void InitializeSound()
 154 {
 155         DEBUG(misc, 1, "Loading sound effects...");
 156         OpenBankFile(BaseSounds::GetUsedSet()->files->filename);
 157 }
 158
 159 /* Low level sound player */
 160 static void StartSound(SoundID sound_id, float pan, uint volume)
 161 {
 162         if (volume == 0) return;
 163
 164         SoundEntry *sound = GetSound(sound_id);
 165         if (sound == NULL) return;
 166
 167         /* NewGRF sound that wasn't loaded yet? */
 168         if (sound->rate == 0 && sound->file_slot != 0) {
 169                 if (!LoadNewGRFSound(sound)) {
 170                         /* Mark as invalid. */
 171                         sound->file_slot = 0;
 172                         return;
 173                 }
 174         }
 175
 176         /* Empty sound? */
 177         if (sound->rate == 0) return;
 178
 179         MixerChannel *mc = MxAllocateChannel();
 180         if (mc == NULL) return;
 181
 182         if (!SetBankSource(mc, sound)) return;
 183
 184         /* Apply the sound effect's own volume. */
 185         volume = sound->volume * volume;
 186
 187         MxSetChannelVolume(mc, volume, pan);
 188         MxActivateChannel(mc);
 189 }
 190
 191
 192 static const byte _vol_factor_by_zoom[] = {255, 255, 255, 190, 134, 87};
 193 assert_compile(lengthof(_vol_factor_by_zoom) == ZOOM_LVL_COUNT);
 194
 195 static const byte _sound_base_vol[] = {
 196         128,  90, 128, 128, 128, 128, 128, 128,
 197         128,  90,  90, 128, 128, 128, 128, 128,
 198         128, 128, 128,  80, 128, 128, 128, 128,
 199         128, 128, 128, 128, 128, 128, 128, 128,
 200         128, 128,  90,  90,  90, 128,  90, 128,
 201         128,  90, 128, 128, 128,  90, 128, 128,
 202         128, 128, 128, 128,  90, 128, 128, 128,
 203         128,  90, 128, 128, 128, 128, 128, 128,
 204         128, 128,  90,  90,  90, 128, 128, 128,
 205          90,
 206 };
 207
 208 static const byte _sound_idx[] = {
 209          2,  3,  4,  5,  6,  7,  8,  9,
 210         10, 11, 12, 13, 14, 15, 16, 17,
 211         18, 19, 20, 21, 22, 23, 24, 25,
 212         26, 27, 28, 29, 30, 31, 32, 33,
 213         34, 35, 36, 37, 38, 39, 40,  0,
 214          1, 41, 42, 43, 44, 45, 46, 47,
 215         48, 49, 50, 51, 52, 53, 54, 55,
 216         56, 57, 58, 59, 60, 61, 62, 63,
 217         64, 65, 66, 67, 68, 69, 70, 71,
 218         72,
 219 };
 220
 221 void SndCopyToPool()
 222 {
 223         SoundEntry *sound = AllocateSound(ORIGINAL_SAMPLE_COUNT);
 224         for (uint i = 0; i < ORIGINAL_SAMPLE_COUNT; i++) {
 225                 sound[i] = _original_sounds[_sound_idx[i]];
 226                 sound[i].volume = _sound_base_vol[i];
 227                 sound[i].priority = 0;
 228         }
 229 }
 230
 231 /**
 232  * Decide 'where' (between left and right speaker) to play the sound effect.
 233  * @param sound Sound effect to play
 234  * @param left   Left edge of virtual coordinates where the sound is produced
 235  * @param right  Right edge of virtual coordinates where the sound is produced
 236  * @param top    Top edge of virtual coordinates where the sound is produced
 237  * @param bottom Bottom edge of virtual coordinates where the sound is produced
 238  */
 239 static void SndPlayScreenCoordFx(SoundID sound, int left, int right, int top, int bottom)
 240 {
 241         if (_settings_client.music.effect_vol == 0) return;
 242
 243         const Window *w;
 244         FOR_ALL_WINDOWS_FROM_BACK(w) {
 245                 const ViewPort *vp = w->viewport;
 246
 247                 if (vp != NULL &&
 248                                 left < vp->virtual_left + vp->virtual_width && right > vp->virtual_left &&
 249                                 top < vp->virtual_top + vp->virtual_height && bottom > vp->virtual_top) {
 250                         int screen_x = (left + right) / 2 - vp->virtual_left;
 251                         int width = (vp->virtual_width == 0 ? 1 : vp->virtual_width);
 252                         float panning = (float)screen_x / width;
 253
 254                         StartSound(
 255                                 sound,
 256                                 panning,
 257                                 (_settings_client.music.effect_vol * _vol_factor_by_zoom[vp->zoom - ZOOM_LVL_BEGIN]) / 256
 258                         );
 259                         return;
 260                 }
 261         }
 262 }
 263
 264 void SndPlayTileFx(SoundID sound, TileIndex tile)
 265 {
 266         /* emits sound from center of the tile */
 267         int x = min(MapMaxX() - 1, TileX(tile)) * TILE_SIZE + TILE_SIZE / 2;
 268         int y = min(MapMaxY() - 1, TileY(tile)) * TILE_SIZE - TILE_SIZE / 2;
 269         int z = (y < 0 ? 0 : GetSlopePixelZ(x, y));
 270         Point pt = RemapCoords(x, y, z);
 271         y += 2 * TILE_SIZE;
 272         Point pt2 = RemapCoords(x, y, GetSlopePixelZ(x, y));
 273         SndPlayScreenCoordFx(sound, pt.x, pt2.x, pt.y, pt2.y);
 274 }
 275
 276 void SndPlayVehicleFx(SoundID sound, const Vehicle *v)
 277 {
 278         SndPlayScreenCoordFx(sound,
 279                 v->coord.left, v->coord.right,
 280                 v->coord.top, v->coord.bottom
 281         );
 282 }
 283
 284 void SndPlayFx(SoundID sound)
 285 {
 286         StartSound(sound, 0.5, _settings_client.music.effect_vol);
 287 }
 288
 289 INSTANTIATE_BASE_MEDIA_METHODS(BaseMedia<SoundsSet>, SoundsSet)
 290
 291 /** Names corresponding to the sound set's files */
 292 const char * const SoundsSet::file_names [1] = { "samples" };