1 files changed, 68 insertions, 0 deletions
diff --git a/src/newgrf_sound.cpp b/src/newgrf_sound.cpp
new file mode 100644
index 000000000..e96934104
--- /dev/null
+++ b/src/newgrf_sound.cpp
@@ -0,0 +1,68 @@
+/* $Id$ */
+
+#include "stdafx.h"
+#include "openttd.h"
+#include "oldpool.h"
+#include "sound.h"
+#include "engine.h"
+#include "vehicle.h"
+#include "newgrf_callbacks.h"
+#include "newgrf_engine.h"
+#include "newgrf_sound.h"
+
+static uint _sound_count = 0;
+STATIC_OLD_POOL(SoundInternal, FileEntry, 3, 1000, NULL, NULL)
+
+
+/* Allocate a new FileEntry */
+FileEntry *AllocateFileEntry(void)
+{
+	if (_sound_count == GetSoundInternalPoolSize()) {
+		if (!AddBlockToPool(&_SoundInternal_pool)) return NULL;
+	}
+
+	return GetSoundInternal(_sound_count++);
+}
+
+
+void InitializeSoundPool(void)
+{
+	CleanPool(&_SoundInternal_pool);
+	_sound_count = 0;
+
+	/* Copy original sound data to the pool */
+	SndCopyToPool();
+}
+
+
+FileEntry *GetSound(uint index)
+{
+	if (index >= _sound_count) return NULL;
+	return GetSoundInternal(index);
+}
+
+
+uint GetNumSounds(void)
+{
+	return _sound_count;
+}
+
+
+bool PlayVehicleSound(const Vehicle *v, VehicleSoundEvent event)
+{
+	const GRFFile *file = GetEngineGRF(v->engine_type);
+	uint16 callback;
+
+	/* If the engine has no GRF ID associated it can't ever play any new sounds */
+	if (file == NULL) return false;
+
+	/* Check that the vehicle type uses the sound effect callback */
+	if (!HASBIT(EngInfo(v->engine_type)->callbackmask, CBM_SOUND_EFFECT)) return false;
+
+	callback = GetVehicleCallback(CBID_VEHICLE_SOUND_EFFECT, event, 0, v->engine_type, v);
+	if (callback == CALLBACK_FAILED) return false;
+	if (callback >= GetNumOriginalSounds()) callback += file->sound_offset - GetNumOriginalSounds();
+
+	if (callback < GetNumSounds()) SndPlayVehicleFx(callback, v);
+	return true;
+}