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/*
* This file is part of OpenTTD.
* 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.
* 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.
* 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/>.
*/
/** @file newgrf_sound.cpp Handling NewGRF provided sounds. */
#include "stdafx.h"
#include "engine_base.h"
#include "newgrf.h"
#include "newgrf_engine.h"
#include "newgrf_sound.h"
#include "vehicle_base.h"
#include "sound_func.h"
#include "random_access_file_type.h"
#include "debug.h"
#include "settings_type.h"
#include "safeguards.h"
static std::vector<SoundEntry> _sounds;
/**
* Allocate sound slots.
* @param num Number of slots to allocate.
* @return First allocated slot.
*/
SoundEntry *AllocateSound(uint num)
{
size_t pos = _sounds.size();
_sounds.insert(_sounds.end(), num, SoundEntry());
return &_sounds[pos];
}
void InitializeSoundPool()
{
_sounds.clear();
/* Copy original sound data to the pool */
SndCopyToPool();
}
SoundEntry *GetSound(SoundID index)
{
if (index >= _sounds.size()) return nullptr;
return &_sounds[index];
}
uint GetNumSounds()
{
return (uint)_sounds.size();
}
/**
* Extract meta data from a NewGRF sound.
* @param sound Sound to load.
* @return True if a valid sound was loaded.
*/
bool LoadNewGRFSound(SoundEntry *sound)
{
if (sound->file_offset == SIZE_MAX || sound->file == nullptr) return false;
RandomAccessFile &file = *sound->file;
file.SeekTo(sound->file_offset, SEEK_SET);
/* Skip ID for container version >= 2 as we only look at the first
* entry and ignore any further entries with the same ID. */
if (sound->grf_container_ver >= 2) file.ReadDword();
/* Format: <num> <FF> <FF> <name_len> <name> '\0' <data> */
uint32 num = sound->grf_container_ver >= 2 ? file.ReadDword() : file.ReadWord();
if (file.ReadByte() != 0xFF) return false;
if (file.ReadByte() != 0xFF) return false;
uint8 name_len = file.ReadByte();
char *name = AllocaM(char, name_len + 1);
file.ReadBlock(name, name_len + 1);
/* Test string termination */
if (name[name_len] != 0) {
DEBUG(grf, 2, "LoadNewGRFSound [%s]: Name not properly terminated", file.GetSimplifiedFilename().c_str());
return false;
}
DEBUG(grf, 2, "LoadNewGRFSound [%s]: Sound name '%s'...", file.GetSimplifiedFilename().c_str(), name);
if (file.ReadDword() != BSWAP32('RIFF')) {
DEBUG(grf, 1, "LoadNewGRFSound [%s]: Missing RIFF header", file.GetSimplifiedFilename().c_str());
return false;
}
uint32 total_size = file.ReadDword();
uint header_size = 11;
if (sound->grf_container_ver >= 2) header_size++; // The first FF in the sprite is only counted for container version >= 2.
if (total_size + name_len + header_size > num) {
DEBUG(grf, 1, "LoadNewGRFSound [%s]: RIFF was truncated", file.GetSimplifiedFilename().c_str());
return false;
}
if (file.ReadDword() != BSWAP32('WAVE')) {
DEBUG(grf, 1, "LoadNewGRFSound [%s]: Invalid RIFF type", file.GetSimplifiedFilename().c_str());
return false;
}
while (total_size >= 8) {
uint32 tag = file.ReadDword();
uint32 size = file.ReadDword();
total_size -= 8;
if (total_size < size) {
DEBUG(grf, 1, "LoadNewGRFSound [%s]: Invalid RIFF", file.GetSimplifiedFilename().c_str());
return false;
}
total_size -= size;
switch (tag) {
case ' tmf': // 'fmt '
/* Audio format, must be 1 (PCM) */
if (size < 16 || file.ReadWord() != 1) {
DEBUG(grf, 1, "LoadGRFSound [%s]: Invalid audio format", file.GetSimplifiedFilename().c_str());
return false;
}
sound->channels = file.ReadWord();
sound->rate = file.ReadDword();
file.ReadDword();
file.ReadWord();
sound->bits_per_sample = file.ReadWord();
/* The rest will be skipped */
size -= 16;
break;
case 'atad': // 'data'
sound->file_size = size;
sound->file_offset = file.GetPos();
DEBUG(grf, 2, "LoadNewGRFSound [%s]: channels %u, sample rate %u, bits per sample %u, length %u", file.GetSimplifiedFilename().c_str(), sound->channels, sound->rate, sound->bits_per_sample, size);
return true; // the fmt chunk has to appear before data, so we are finished
default:
/* Skip unknown chunks */
break;
}
/* Skip rest of chunk */
if (size > 0) file.SkipBytes(size);
}
DEBUG(grf, 1, "LoadNewGRFSound [%s]: RIFF does not contain any sound data", file.GetSimplifiedFilename().c_str());
/* Clear everything that was read */
MemSetT(sound, 0);
return false;
}
/**
* Resolve NewGRF sound ID.
* @param file NewGRF to get sound from.
* @param sound_id GRF-specific sound ID. (GRF-local for IDs above ORIGINAL_SAMPLE_COUNT)
* @return Translated (global) sound ID, or INVALID_SOUND.
*/
SoundID GetNewGRFSoundID(const GRFFile *file, SoundID sound_id)
{
/* Global sound? */
if (sound_id < ORIGINAL_SAMPLE_COUNT) return sound_id;
sound_id -= ORIGINAL_SAMPLE_COUNT;
if (file == nullptr || sound_id >= file->num_sounds) return INVALID_SOUND;
return file->sound_offset + sound_id;
}
/**
* 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)
{
if (!_settings_client.sound.vehicle) return true;
const GRFFile *file = v->GetGRF();
uint16 callback;
/* If the engine has no GRF ID associated it can't ever play any new sounds */
if (file == nullptr) return false;
/* Check that the vehicle type uses the sound effect callback */
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;
callback = GetNewGRFSoundID(file, callback);
/* Play no sound, if result is invalid */
if (callback == INVALID_SOUND) return true;
assert(callback < GetNumSounds());
SndPlayVehicleFx(callback, v);
return true;
}
/**
* Play a NewGRF sound effect at the location of a specific tile.
* @param file NewGRF triggering the sound effect.
* @param sound_id Sound effect the NewGRF wants to play.
* @param tile Location of the effect.
*/
void PlayTileSound(const GRFFile *file, SoundID sound_id, TileIndex tile)
{
sound_id = GetNewGRFSoundID(file, sound_id);
if (sound_id == INVALID_SOUND) return;
assert(sound_id < GetNumSounds());
SndPlayTileFx(sound_id, tile);
}
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