snd_main.h

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20
  21 #ifndef SND_MAIN_H
  22 #define SND_MAIN_H
  23
  24 #include "sound.h"
  25
  26
  27 typedef struct
  28 {
  29         size_t  length;
  30         size_t  offset;
  31         qbyte   data[4];        // variable sized
  32 } sfxbuffer_t;
  33
  34 typedef struct
  35 {
  36         unsigned int    speed;
  37         unsigned int    width;
  38         unsigned int    channels;
  39 } snd_format_t;
  40
  41 // sfx_t flags
  42 #define SFXFLAG_NONE                    0
  43 #define SFXFLAG_FILEMISSING             (1 << 0) // wasn't able to load the associated sound file
  44 #define SFXFLAG_SERVERSOUND             (1 << 1) // the sfx is part of the server precache list
  45 #define SFXFLAG_STREAMED                (1 << 2) // informative only. You shouldn't need to know that
  46
  47 typedef struct snd_fetcher_s snd_fetcher_t;
  48 struct sfx_s
  49 {
  50         char                            name[MAX_QPATH];
  51         sfx_t                           *next;
  52         mempool_t                       *mempool;
  53         unsigned int            locks;                  // A locked sfx_t must not be freed.
  54                                                                                 // Locks are added by S_PrecacheSound and S_ServerSounds.
  55                                                                                 // SFX can be freed by S_UnlockSfx or S_ServerSounds.
  56         unsigned int            flags;                  // cf SFXFLAG_* defines
  57         snd_format_t            format;
  58         int                                     loopstart;
  59         size_t                          total_length;
  60         const snd_fetcher_t     *fetcher;
  61         void                            *fetcher_data;  // Per-sfx data for the sound fetching functions
  62 };
  63
  64 typedef struct
  65 {
  66         snd_format_t    format;
  67         int                             samples;                // mono samples in buffer
  68         int                             samplepos;              // in mono samples
  69         unsigned char   *buffer;
  70         int                             bufferlength;   // used only by certain drivers
  71 } dma_t;
  72
  73 typedef struct
  74 {
  75         sfx_t                   *sfx;                   // sfx number
  76         unsigned int    flags;                  // cf CHANNELFLAG_* defines
  77         int                             master_vol;             // 0-255 master volume
  78         int                             leftvol;                // 0-255 volume
  79         int                             rightvol;               // 0-255 volume
  80         int                             end;                    // end time in global paintsamples
  81         int                             lastptime;              // last time this channel was painted
  82         int                             pos;                    // sample position in sfx
  83         int                             entnum;                 // to allow overriding a specific sound
  84         int                             entchannel;
  85         vec3_t                  origin;                 // origin of sound effect
  86         vec_t                   dist_mult;              // distance multiplier (attenuation/clipK)
  87         void                    *fetcher_data;  // Per-channel data for the sound fetching function
  88 } channel_t;
  89
  90 typedef const sfxbuffer_t* (*snd_fetcher_getsb_t) (channel_t* ch, unsigned int start, unsigned int nbsamples);
  91 typedef void (*snd_fetcher_end_t) (channel_t* ch);
  92 struct snd_fetcher_s
  93 {
  94         snd_fetcher_getsb_t             getsb;
  95         snd_fetcher_end_t               end;
  96 };
  97
  98 void S_PaintChannels(int endtime);
  99
 100 // initializes cycling through a DMA buffer and returns information on it
 101 qboolean SNDDMA_Init(void);
 102
 103 // gets the current DMA position
 104 int SNDDMA_GetDMAPos(void);
 105
 106 void SNDDMA_Submit(void);
 107
 108 // shutdown the DMA xfer.
 109 void SNDDMA_Shutdown(void);
 110
 111 qboolean S_LoadSound (sfx_t *s, qboolean complain);
 112 void S_UnloadSound(sfx_t *s);
 113
 114 void *S_LockBuffer(void);
 115 void S_UnlockBuffer(void);
 116
 117 extern size_t ResampleSfx (const qbyte *in_data, size_t in_length, const snd_format_t* in_format, qbyte *out_data, const char* sfxname);
 118
 119 // ====================================================================
 120 // User-setable variables
 121 // ====================================================================
 122
 123 // 0 to NUM_AMBIENTS - 1 = water, etc
 124 // NUM_AMBIENTS to NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS - 1 = normal entity sounds
 125 // NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS to total_channels = static sounds
 126 #define MAX_CHANNELS                    516
 127 #define MAX_DYNAMIC_CHANNELS    128
 128
 129 extern channel_t channels[MAX_CHANNELS];
 130
 131 extern unsigned int total_channels;
 132
 133 extern int paintedtime;
 134 extern int soundtime;
 135 extern volatile dma_t *shm;
 136
 137 extern cvar_t snd_swapstereo;
 138 extern cvar_t snd_streaming;
 139
 140 extern int snd_blocked;
 141
 142
 143 #endif