Crossfire Server, Trunk  R213250
sounds.c
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1 /*
2  * Crossfire -- cooperative multi-player graphical RPG and adventure game
3  *
4  * Copyright (c) 1999-2014 Mark Wedel and the Crossfire Development Team
5  * Copyright (c) 1992 Frank Tore Johansen
6  *
7  * Crossfire is free software and comes with ABSOLUTELY NO WARRANTY. You are
8  * welcome to redistribute it under certain conditions. For details, please
9  * see COPYING and LICENSE.
10  *
11  * The authors can be reached via e-mail at <crossfire@metalforge.org>.
12  */
13 
21 #include "global.h"
22 
23 #include <assert.h>
24 #include <stdlib.h>
25 #include <string.h>
26 
27 #include "sounds.h"
28 #include "sproto.h"
29 
35 #define MAX_SOUND_DISTANCE 10
36 
51 void play_sound_player_only(player *pl, int8_t sound_type, object *emitter, int dir, const char *action) {
52  SockList sl;
53  int volume = 50;
54  sstring name;
55  object *source;
56 
57  if (pl->socket.sound&SND_MUTE || !(pl->socket.sound&SND_EFFECTS))
58  return;
60  return;
61  if (!emitter->map && !(emitter->env && emitter->env->map))
62  return;
63 
64  source = emitter->map ? emitter : emitter->env;
65 
66  // Approximate the distance to the emitter from the source
67  int dx = FABS(source->x-pl->ob->x),
68  dy = FABS(source->y-pl->ob->y);
69  int distance = (MIN(dx, dy) * 3 + FABS(dx-dy) * 2) / 2;
70  // Make the sound dissipation more gradual.
71  distance >>= 1;
72  // Downscale the volume by distance
73  volume = distance ? volume / distance : volume;
74 
75  pl->socket.sounds_this_tick = 0;
76 
77  name = emitter->type == PLAYER ? emitter->race : emitter->name;
78  if (!source)
79  source = emitter;
80 
81  SockList_Init(&sl);
82  SockList_AddString(&sl, "sound2 ");
83  SockList_AddChar(&sl, (int8_t)(source->x-pl->ob->x));
84  SockList_AddChar(&sl, (int8_t)(source->y-pl->ob->y));
85  SockList_AddChar(&sl, dir);
86  SockList_AddChar(&sl, volume);
87  SockList_AddChar(&sl, sound_type);
88  SockList_AddLen8Data(&sl, action, strlen(action));
89  SockList_AddLen8Data(&sl, name, strlen(name));
90  Send_With_Handling(&pl->socket, &sl);
91  SockList_Term(&sl);
92 }
93 
94 #define POW2(x) ((x)*(x))
95 
107 void play_sound_map(int8_t sound_type, object *emitter, int dir, const char *action) {
108  player *pl;
109  object *source;
110 
111  if (!emitter->map && !(emitter->env && emitter->env->map))
112  return;
113 
114  source = emitter->map ? emitter : emitter->env;
115 
116  for (pl = first_player; pl; pl = pl->next) {
117  if (pl->ob->map == emitter->map) {
118  int distance = isqrt(POW2(pl->ob->x-source->x)+POW2(pl->ob->y-source->y));
119 
120  if (distance <= MAX_SOUND_DISTANCE) {
121  play_sound_player_only(pl, sound_type, emitter, dir, action);
122  }
123  }
124  }
125 }
126 
135 void send_background_music(player *pl, const char *music) {
136  SockList sl;
137 
138  if (pl->socket.sound&SND_MUTE || !(pl->socket.sound&SND_MUSIC))
139  return;
140 
141  SockList_Init(&sl);
142  SockList_AddString(&sl, "music ");
143  SockList_AddString(&sl, music == NULL ? "NONE" : music);
144  Send_With_Handling(&pl->socket, &sl);
145  SockList_Term(&sl);
146 }
147 
148 static char const* pick_bg_music(mapstruct map[static 1]) {
149  if (map->background_music != NULL) {
150  return map->background_music;
151  }
152  return get_name_of_region_for_map(map);
153 }
154 
155 void player_update_bg_music(object player[static 1]) {
156  assert(player->contr);
157  assert(player->type == PLAYER);
158  send_background_music(player->contr, pick_bg_music(player->map));
159 }
160 
Definition: player.h:92
const char * race
Definition: object.h:318
void SockList_Init(SockList *sl)
Definition: lowlevel.c:48
#define FABS(x)
Definition: define.h:22
void play_sound_player_only(player *pl, int8_t sound_type, object *emitter, int dir, const char *action)
Definition: sounds.c:51
#define SND_EFFECTS
Definition: sounds.h:12
#define SND_MUTE
Definition: sounds.h:14
void send_background_music(player *pl, const char *music)
Definition: sounds.c:135
socket_struct socket
Definition: player.h:94
int isqrt(int n)
Definition: utils.c:586
int8_t sounds_this_tick
Definition: newserver.h:121
#define MAX_SOUND_DISTANCE
Definition: sounds.c:35
#define MIN(x, y)
Definition: compat.h:17
static char const * pick_bg_music(mapstruct map[static 1])
Definition: sounds.c:148
int16_t y
Definition: object.h:326
void play_sound_map(int8_t sound_type, object *emitter, int dir, const char *action)
Definition: sounds.c:107
uint32_t sound
Definition: newserver.h:111
struct mapdef * map
Definition: object.h:297
void SockList_Term(SockList *sl)
Definition: lowlevel.c:58
void player_update_bg_music(object player[static 1])
Definition: sounds.c:155
const char * name
Definition: object.h:311
struct obj * env
Definition: object.h:293
void SockList_AddString(SockList *sl, const char *data)
Definition: lowlevel.c:149
struct pl * contr
Definition: object.h:276
int16_t x
Definition: object.h:326
void SockList_AddChar(SockList *sl, unsigned char c)
Definition: lowlevel.c:98
object * ob
Definition: player.h:158
const char * sstring
Definition: global.h:40
Definition: object.h:107
signed char int8_t
Definition: win32.h:158
#define POW2(x)
Definition: sounds.c:94
uint8_t type
Definition: object.h:339
void SockList_AddLen8Data(SockList *sl, const void *data, size_t len)
Definition: lowlevel.c:171
const char * get_name_of_region_for_map(const mapstruct *m)
Definition: region.c:92
EXTERN player * first_player
Definition: global.h:117
struct pl * next
Definition: player.h:93
#define MAX_SOUNDS_TICK
Definition: sounds.h:16
#define SND_MUSIC
Definition: sounds.h:13
Definition: map.h:325
char * background_music
Definition: map.h:367
void Send_With_Handling(socket_struct *ns, SockList *sl)
Definition: lowlevel.c:435