cpp/openttd-patchpack/source Files · sound.c

Files @ r2008:5e435ad4c8e4

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Location: cpp/openttd-patchpack/source/sound.c

r2008:5e435ad4c8e4 4.9 KiB text/x-c Show Annotation Show as Raw Download as Raw

hackykid

(svn r2516) - Feature: [pbs] Implement path-based-signalling. This allows multiple trains within the same signal block, provided their paths dont intersect. For this the block must have all exit and entry signals be pbs signals. Place these by ctrl-clicking 4 times on a normal signal.
- Feature: [pbs] Implement autoplacement of pbs blocks, when a block has an entry and an exit pbs signal, covert the entire block to pbs. Can be turned off in the patch settings.
- Feature: [pbs] Allow showing of reserved status by making the tracks darker, when the pbs debug level is at least 1.

#include "stdafx.h"
#include "openttd.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 31


static void OpenBankFile(const char *filename)
{
	uint count, i;
	uint32 size, tag;
	FileEntry *fe;

	FioOpenFile(SOUND_SLOT, filename);
	_file_count = count = FioReadDword() >> 3;
	fe = _files = calloc(sizeof(FileEntry), count);

	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 (;;) {
				tag = FioReadDword();
				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)
{
	FileEntry *fe = &_files[bank];
	int8 *mem;
	uint i;

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

	mem = malloc(fe->file_size); /* XXX unchecked malloc */
	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, uint panning, uint volume)
{
	if (volume != 0) {
		MixerChannel *mc = MxAllocateChannel(_mixer);
		if (mc == NULL)
			return;
		if (SetBankSource(mc, sound)) {
			MxSetChannelVolume(mc, volume << 8, volume << 8);
			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)
{
	Window *w;
	ViewPort *vp;
	int left;

	if (msf.effect_vol == 0)
		return;

	for (w = _windows; w != _last_window; w++) {
		if ((vp = w->viewport) != NULL &&
				IS_INSIDE_1D(x, vp->virtual_left, vp->virtual_width) &&
				IS_INSIDE_1D(y, vp->virtual_top, vp->virtual_height)) {

			left = ((x - vp->virtual_left) >> vp->zoom) + vp->left;
			StartSound(
				_sound_idx[sound],
				clamp(left / 71, 0, 8),
				(_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 (+ 8) of the tile */
	int x = TileX(tile) * 16 + 8;
	int y = TileY(tile) * 16 + 8;
	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],
		4,
		(_sound_base_vol[sound] * msf.effect_vol) >> 7
	);
}