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/*
* Crossfire -- cooperative multi-player graphical RPG and adventure game
*
* Copyright (c) 1999-2014 Mark Wedel and the Crossfire Development Team
* Copyright (c) 1992 Frank Tore Johansen
*
* Crossfire is free software and comes with ABSOLUTELY NO WARRANTY. You are
* welcome to redistribute it under certain conditions. For details, please
* see COPYING and LICENSE.
*
* The authors can be reached via e-mail at <crossfire@metalforge.org>.
*/
/**
* \file
* Sound-related functions.
*
* \date 2003-12-02
*/
#include "global.h"
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include "sounds.h"
#include "sproto.h"
/**
* Maximum distance a player may hear a sound from.
* This is only used for new client/server sound. If the sound source
* on the map is farther away than this, we don't sent it to the client.
*/
#define MAX_SOUND_DISTANCE 10
/**
* Plays a sound for specified player only.
*
* @param pl
* player to play sound to.
* @param sound_type
* sound type, see @ref Soundtypes "the sound types".
* @param emitter
* object emitting a sound.
* @param dir
* direction the sound is moving into.
* @param action
* sound name to play.
*/
void play_sound_player_only(player *pl, int8_t sound_type, object *emitter, int dir, const char *action) {
SockList sl;
int volume = 50;
sstring name;
object *source;
if (pl->socket.sound&SND_MUTE || !(pl->socket.sound&SND_EFFECTS))
return;
if (pl->socket.sounds_this_tick >= MAX_SOUNDS_TICK)
return;
if (!emitter->map && !(emitter->env && emitter->env->map))
return;
source = emitter->map ? emitter : emitter->env;
// Approximate the distance to the emitter from the source
int dx = FABS(source->x-pl->ob->x),
dy = FABS(source->y-pl->ob->y);
int distance = (MIN(dx, dy) * 3 + FABS(dx-dy) * 2) / 2;
// Make the sound dissipation more gradual.
distance >>= 1;
// Downscale the volume by distance
volume = distance ? volume / distance : volume;
pl->socket.sounds_this_tick = 0;
name = emitter->type == PLAYER ? emitter->race : emitter->name;
if (!source)
source = emitter;
SockList_Init(&sl);
SockList_AddString(&sl, "sound2 ");
SockList_AddChar(&sl, (int8_t)(source->x-pl->ob->x));
SockList_AddChar(&sl, (int8_t)(source->y-pl->ob->y));
SockList_AddChar(&sl, dir);
SockList_AddChar(&sl, volume);
SockList_AddChar(&sl, sound_type);
SockList_AddLen8Data(&sl, action, strlen(action));
SockList_AddLen8Data(&sl, name, strlen(name));
Send_With_Handling(&pl->socket, &sl);
SockList_Term(&sl);
}
#define POW2(x) ((x)*(x))
/**
* Plays a sound on a map.
* @param sound_type
* sound type, see @ref Soundtypes "the sound types".
* @param emitter
* object emitting the sound. Must be on a map.
* @param dir
* direction the sound is moving.
* @param action
* sound name to play.
*/
void play_sound_map(int8_t sound_type, object *emitter, int dir, const char *action) {
player *pl;
object *source;
if (!emitter->map && !(emitter->env && emitter->env->map))
return;
source = emitter->map ? emitter : emitter->env;
for (pl = first_player; pl; pl = pl->next) {
if (pl->ob->map == emitter->map) {
int distance = isqrt(POW2(pl->ob->x-source->x)+POW2(pl->ob->y-source->y));
if (distance <= MAX_SOUND_DISTANCE) {
play_sound_player_only(pl, sound_type, emitter, dir, action);
}
}
}
}
/**
* Sends background music to client.
*
* @param pl
* player
* @param music
* background music name. Can be NULL.
*/
void send_background_music(player *pl, const char *music) {
SockList sl;
if (pl->socket.sound&SND_MUTE || !(pl->socket.sound&SND_MUSIC))
return;
SockList_Init(&sl);
SockList_AddString(&sl, "music ");
SockList_AddString(&sl, music == NULL ? "NONE" : music);
Send_With_Handling(&pl->socket, &sl);
SockList_Term(&sl);
}
static char const* pick_bg_music(mapstruct map[static 1]) {
if (map->background_music != NULL) {
return map->background_music;
}
return get_name_of_region_for_map(map);
}
void player_update_bg_music(object player[static 1]) {
assert(player->contr);
assert(player->type == PLAYER);
send_background_music(player->contr, pick_bg_music(player->map));
}
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