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/* $Id$ */
#include "stdafx.h"
#include "openttd.h"
#include "functions.h"
#include "map.h"
#include "mixer.h"
#include "sound.h"
#include "vehicle.h"
#include "window.h"
#include "viewport.h"
#include "fileio.h"
typedef struct FileEntry {
uint32 file_offset;
uint32 file_size;
uint16 rate;
uint8 bits_per_sample;
uint8 channels;
} FileEntry;
static uint _file_count;
static FileEntry *_files;
#define SOUND_SLOT 63
// Number of levels of panning per side
#define PANNING_LEVELS 16
static void OpenBankFile(const char *filename)
{
FileEntry *fe;
uint count;
uint i;
FioOpenFile(SOUND_SLOT, filename);
count = FioReadDword() / 8;
fe = calloc(count, sizeof(*fe));
if (fe == NULL) {
_file_count = 0;
_files = NULL;
return;
}
_file_count = count;
_files = fe;
FioSeekTo(0, SEEK_SET);
for (i = 0; i != count; i++) {
fe[i].file_offset = FioReadDword();
fe[i].file_size = FioReadDword();
}
for (i = 0; i != count; i++, fe++) {
char name[255];
FioSeekTo(fe->file_offset, SEEK_SET);
// Check for special case, see else case
FioReadBlock(name, FioReadByte()); // Read the name of the sound
if (strcmp(name, "Corrupt sound") != 0) {
FioSeekTo(12, SEEK_CUR); // Skip past RIFF header
// Read riff tags
for (;;) {
uint32 tag = FioReadDword();
uint32 size = FioReadDword();
if (tag == ' tmf') {
FioReadWord(); // wFormatTag
fe->channels = FioReadWord(); // wChannels
FioReadDword(); // samples per second
fe->rate = 11025; // seems like all samples should be played at this rate.
FioReadDword(); // avg bytes per second
FioReadWord(); // alignment
fe->bits_per_sample = FioReadByte(); // bits per sample
FioSeekTo(size - (2 + 2 + 4 + 4 + 2 + 1), SEEK_CUR);
} else if (tag == 'atad') {
fe->file_size = size;
fe->file_offset = FioGetPos() | (SOUND_SLOT << 24);
break;
} else {
fe->file_size = 0;
break;
}
}
} else {
/*
* Special case for the jackhammer sound
* (name in sample.cat is "Corrupt sound")
* It's no RIFF file, but raw PCM data
*/
fe->channels = 1;
fe->rate = 11025;
fe->bits_per_sample = 8;
fe->file_offset = FioGetPos() | (SOUND_SLOT << 24);
}
}
}
static bool SetBankSource(MixerChannel *mc, uint bank)
{
const FileEntry *fe;
int8 *mem;
uint i;
if (bank >= _file_count) return false;
fe = &_files[bank];
if (fe->file_size == 0) return false;
mem = malloc(fe->file_size);
if (mem == NULL) return false;
FioSeekToFile(fe->file_offset);
FioReadBlock(mem, fe->file_size);
for (i = 0; i != fe->file_size; i++)
mem[i] += -128; // Convert unsigned sound data to signed
assert(fe->bits_per_sample == 8 && fe->channels == 1 && fe->file_size != 0 && fe->rate != 0);
MxSetChannelRawSrc(mc, mem, fe->file_size, fe->rate, MX_AUTOFREE);
return true;
}
bool SoundInitialize(const char *filename)
{
OpenBankFile(filename);
return true;
}
// Low level sound player
static void StartSound(uint sound, int panning, uint volume)
{
MixerChannel *mc;
uint left_vol, right_vol;
if (volume == 0) return;
mc = MxAllocateChannel();
if (mc == NULL) return;
if (!SetBankSource(mc, sound)) return;
panning = clamp(panning, -PANNING_LEVELS, PANNING_LEVELS);
left_vol = (volume * PANNING_LEVELS) - (volume * panning);
right_vol = (volume * PANNING_LEVELS) + (volume * panning);
MxSetChannelVolume(mc, left_vol * 128 / PANNING_LEVELS, right_vol * 128 / PANNING_LEVELS);
MxActivateChannel(mc);
}
static const byte _vol_factor_by_zoom[] = {255, 190, 134};
static const byte _sound_base_vol[] = {
128, 90, 128, 128, 128, 128, 128, 128,
128, 90, 90, 128, 128, 128, 128, 128,
128, 128, 128, 80, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 90, 90, 90, 128, 90, 128,
128, 90, 128, 128, 128, 90, 128, 128,
128, 128, 128, 128, 90, 128, 128, 128,
128, 90, 128, 128, 128, 128, 128, 128,
128, 128, 90, 90, 90, 128, 128, 128,
90,
};
static const byte _sound_idx[] = {
2, 3, 4, 5, 6, 7, 8, 9,
10, 11, 12, 13, 14, 15, 16, 17,
18, 19, 20, 21, 22, 23, 24, 25,
26, 27, 28, 29, 30, 31, 32, 33,
34, 35, 36, 37, 38, 39, 40, 0,
1, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55,
56, 57, 58, 59, 60, 61, 62, 63,
64, 65, 66, 67, 68, 69, 70, 71,
72,
};
static void SndPlayScreenCoordFx(SoundFx sound, int x, int y)
{
const Window *w;
if (msf.effect_vol == 0) return;
for (w = _windows; w != _last_window; w++) {
const ViewPort* vp = w->viewport;
if (vp != NULL &&
IS_INSIDE_1D(x, vp->virtual_left, vp->virtual_width) &&
IS_INSIDE_1D(y, vp->virtual_top, vp->virtual_height)) {
int left = (x - vp->virtual_left);
StartSound(
_sound_idx[sound],
left / (vp->virtual_width / ((PANNING_LEVELS << 1) + 1)) - PANNING_LEVELS,
(_sound_base_vol[sound] * msf.effect_vol * _vol_factor_by_zoom[vp->zoom]) >> 15
);
return;
}
}
}
void SndPlayTileFx(SoundFx sound, TileIndex tile)
{
/* emits sound from center of the tile */
int x = TileX(tile) * TILE_SIZE + TILE_SIZE / 2;
int y = TileY(tile) * TILE_SIZE + TILE_SIZE / 2;
Point pt = RemapCoords(x, y, GetSlopeZ(x, y));
SndPlayScreenCoordFx(sound, pt.x, pt.y);
}
void SndPlayVehicleFx(SoundFx sound, const Vehicle *v)
{
SndPlayScreenCoordFx(sound,
(v->left_coord + v->right_coord) / 2,
(v->top_coord + v->bottom_coord) / 2
);
}
void SndPlayFx(SoundFx sound)
{
StartSound(
_sound_idx[sound],
0,
(_sound_base_vol[sound] * msf.effect_vol) >> 7
);
}
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