newgrf_sound.cpp

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00001 /* $Id: newgrf_sound.cpp 15299 2009-01-31 20:16:06Z smatz $ */
00002 
00005 #include "stdafx.h"
00006 #include "engine_base.h"
00007 #include "newgrf_engine.h"
00008 #include "newgrf_sound.h"
00009 #include "vehicle_base.h"
00010 #include "sound_func.h"
00011 
00012 static uint _sound_count = 0;
00013 STATIC_OLD_POOL(SoundInternal, FileEntry, 3, 1000, NULL, NULL)
00014 
00015 
00016 /* Allocate a new FileEntry */
00017 FileEntry *AllocateFileEntry()
00018 {
00019   if (_sound_count == GetSoundInternalPoolSize()) {
00020     if (!_SoundInternal_pool.AddBlockToPool()) return NULL;
00021   }
00022 
00023   return GetSoundInternal(_sound_count++);
00024 }
00025 
00026 
00027 void InitializeSoundPool()
00028 {
00029   _SoundInternal_pool.CleanPool();
00030   _sound_count = 0;
00031 
00032   /* Copy original sound data to the pool */
00033   SndCopyToPool();
00034 }
00035 
00036 
00037 FileEntry *GetSound(uint index)
00038 {
00039   if (index >= GetNumSounds()) return NULL;
00040   return GetSoundInternal(index);
00041 }
00042 
00043 
00044 uint GetNumSounds()
00045 {
00046   return _sound_count;
00047 }
00048 
00049 
00050 bool PlayVehicleSound(const Vehicle *v, VehicleSoundEvent event)
00051 {
00052   const GRFFile *file = GetEngineGRF(v->engine_type);
00053   uint16 callback;
00054 
00055   /* If the engine has no GRF ID associated it can't ever play any new sounds */
00056   if (file == NULL) return false;
00057 
00058   /* Check that the vehicle type uses the sound effect callback */
00059   if (!HasBit(EngInfo(v->engine_type)->callbackmask, CBM_VEHICLE_SOUND_EFFECT)) return false;
00060 
00061   callback = GetVehicleCallback(CBID_VEHICLE_SOUND_EFFECT, event, 0, v->engine_type, v);
00062   if (callback == CALLBACK_FAILED) return false;
00063   if (callback >= GetNumOriginalSounds()) callback += file->sound_offset - GetNumOriginalSounds();
00064 
00065   if (callback < GetNumSounds()) SndPlayVehicleFx((SoundFx)callback, v);
00066   return true;
00067 }
00068 
00069 bool PlayTileSound(const GRFFile *file, uint16 sound_id, TileIndex tile)
00070 {
00071   if (sound_id >= GetNumOriginalSounds()) sound_id += file->sound_offset - GetNumOriginalSounds();
00072 
00073   if (sound_id < GetNumSounds()) {
00074     SndPlayTileFx((SoundFx)sound_id, tile);
00075     return true;
00076   }
00077   return false;
00078 }

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