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/* $Id$ */

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#include "stdafx.h"

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#include "openttd.h"

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#include "pool.h"

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#include "sound.h"

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#include "engine.h"

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#include "vehicle.h"

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#include "newgrf_callbacks.h"

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#include "newgrf_engine.h"

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#include "newgrf_sound.h"

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enum {

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	SOUND_POOL_BLOCK_SIZE_BITS = 3, /* (1 << 3) == 8 items */

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	SOUND_POOL_MAX_BLOCKS      = 1000,

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};

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static uint _sound_count = 0;

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static MemoryPool _sound_pool = { "Sound", SOUND_POOL_MAX_BLOCKS, SOUND_POOL_BLOCK_SIZE_BITS, sizeof(FileEntry), NULL, NULL, 0, 0, NULL };

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/* Allocate a new FileEntry */

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FileEntry *AllocateFileEntry(void)

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{

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	if (_sound_count == _sound_pool.total_items) {

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		if (!AddBlockToPool(&_sound_pool)) return NULL;

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	}

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	return (FileEntry*)GetItemFromPool(&_sound_pool, _sound_count++);

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}

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void InitializeSoundPool(void)

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{

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	CleanPool(&_sound_pool);

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	_sound_count = 0;

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	/* Copy original sound data to the pool */

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	SndCopyToPool();

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}

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FileEntry *GetSound(uint index)

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{

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	if (index >= _sound_count) return NULL;

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	return (FileEntry*)GetItemFromPool(&_sound_pool, index);

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}

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uint GetNumSounds(void)

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{

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	return _sound_count;

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}

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bool PlayVehicleSound(const Vehicle *v, VehicleSoundEvent event)

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{

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	const GRFFile *file = GetEngineGRF(v->engine_type);

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	uint16 callback;

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	/* If the engine has no GRF ID associated it can't ever play any new sounds */

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	if (file == NULL) return false;

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	/* Check that the vehicle type uses the sound effect callback */

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	if (!HASBIT(EngInfo(v->engine_type)->callbackmask, CBM_SOUND_EFFECT)) return false;

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	callback = GetVehicleCallback(CBID_VEHICLE_SOUND_EFFECT, event, 0, v->engine_type, v);

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	if (callback == CALLBACK_FAILED) return false;

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	if (callback >= GetNumOriginalSounds()) callback += file->sound_offset - GetNumOriginalSounds();

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	SndPlayVehicleFx(callback, v);

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	return true;

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}