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(svn r22614) -Fix [FS#4656]: If callback 33 returns a value out of range, no sound effect shall be played.

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frosch
2011-07-02 11:24:39 +00:00
parent 22378a2164
commit ff52f85b9e
1 changed files with 12 additions and 1 deletions
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13
src/newgrf_sound.cpp
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@@ -51,6 +51,12 @@ uint GetNumSounds()
}
/**
* Checks whether a NewGRF wants to play a different vehicle sound effect.
* @param v Vehicle to play sound effect for.
* @param event Trigger for the sound effect.
* @return false if the default sound effect shall be played instead.
*/
bool PlayVehicleSound(const Vehicle *v, VehicleSoundEvent event)
{
const GRFFile *file = GetEngineGRF(v->engine_type);
@@ -63,10 +69,15 @@ bool PlayVehicleSound(const Vehicle *v, VehicleSoundEvent event)
if (!HasBit(EngInfo(v->engine_type)->callback_mask, CBM_VEHICLE_SOUND_EFFECT)) return false;
callback = GetVehicleCallback(CBID_VEHICLE_SOUND_EFFECT, event, 0, v->engine_type, v);
/* Play default sound if callback fails */
if (callback == CALLBACK_FAILED) return false;
if (callback >= ORIGINAL_SAMPLE_COUNT) {
callback -= ORIGINAL_SAMPLE_COUNT;
if (callback > file->num_sounds) return false;
/* Play no sound if result is out of range */
if (callback > file->num_sounds) return true;
callback += file->sound_offset;
}