Files @ r5625:52b2115bd185
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Location: cpp/openttd-patchpack/source/src/sound.cpp

miham
(svn r8084) [Translations] Added nynorsk translation (pollux), renamed norwegian to norwegian bokmal, moved nynorsk to finished languages, and updated project files.
Strings pending to nynorsk will be preserved if they are differ from the current translation
/* $Id$ */

#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"
#include "newgrf_sound.h"
#include "helpers.hpp"

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)
{
	uint count;
	uint i;

	FioOpenFile(SOUND_SLOT, filename);
	count = FioReadDword() / 8;
	FileEntry *fe = CallocT<FileEntry>(count);

	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);
		}
	}
}

uint GetNumOriginalSounds(void)
{
	return _file_count;
}

static bool SetBankSource(MixerChannel *mc, uint bank)
{
	const FileEntry *fe;
	uint i;

	if (bank >= GetNumSounds()) return false;
	fe = GetSound(bank);

	if (fe->file_size == 0) return false;

	int8 *mem = MallocT<int8>(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,
};

void SndCopyToPool(void)
{
	uint i;

	for (i = 0; i < _file_count; i++) {
		FileEntry *orig = &_files[_sound_idx[i]];
		FileEntry *fe = AllocateFileEntry();

		*fe = *orig;
		fe->volume = _sound_base_vol[i];
		fe->priority = 0;
	}
}

static void SndPlayScreenCoordFx(SoundFx sound, int x, int y)
{
	Window* const *wz;

	if (msf.effect_vol == 0) return;

	FOR_ALL_WINDOWS(wz) {
		const ViewPort *vp = (*wz)->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,
				left / (vp->virtual_width / ((PANNING_LEVELS << 1) + 1)) - PANNING_LEVELS,
				(GetSound(sound)->volume * 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,
		0,
		(GetSound(sound)->volume * msf.effect_vol) >> 7
	);
}