ref: cf2166483908b35d607e2431549cc31410283a8d
dir: /src/i_sound.c/
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 2005-2014 Simon Howard
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// DESCRIPTION: none
//
#include <stdio.h>
#include <stdlib.h>
#include "SDL_mixer.h"
#include "config.h"
#include "doomtype.h"
#include "gusconf.h"
#include "i_sound.h"
#include "i_video.h"
#include "m_argv.h"
#include "m_config.h"
// Sound sample rate to use for digital output (Hz)
int snd_samplerate = 44100;
// Maximum number of bytes to dedicate to allocated sound effects.
// (Default: 64MB)
int snd_cachesize = 64 * 1024 * 1024;
// Config variable that controls the sound buffer size.
// We default to 28ms (1000 / 35fps = 1 buffer per tic).
int snd_maxslicetime_ms = 28;
// External command to invoke to play back music.
char *snd_musiccmd = "";
// Whether to vary the pitch of sound effects
// Each game will set the default differently
int snd_pitchshift = -1;
int snd_musicdevice = SNDDEVICE_SB;
int snd_sfxdevice = SNDDEVICE_SB;
// Low-level sound and music modules we are using
static sound_module_t *sound_module;
static music_module_t *music_module;
// If true, the music pack module was successfully initialized.
static boolean music_packs_active = false;
// This is either equal to music_module or &music_pack_module,
// depending on whether the current track is substituted.
static music_module_t *active_music_module;
// Sound modules
extern void I_InitTimidityConfig(void);
extern sound_module_t sound_sdl_module;
extern sound_module_t sound_pcsound_module;
extern music_module_t music_sdl_module;
extern music_module_t music_opl_module;
extern music_module_t music_pack_module;
// For OPL module:
extern opl_driver_ver_t opl_drv_ver;
extern int opl_io_port;
// For native music module:
extern char *music_pack_path;
extern char *timidity_cfg_path;
// DOS-specific options: These are unused but should be maintained
// so that the config file can be shared between chocolate
// doom and doom.exe
static int snd_sbport = 0;
static int snd_sbirq = 0;
static int snd_sbdma = 0;
static int snd_mport = 0;
// Compiled-in sound modules:
static sound_module_t *sound_modules[] =
{
&sound_sdl_module,
&sound_pcsound_module,
NULL,
};
// Compiled-in music modules:
static music_module_t *music_modules[] =
{
&music_sdl_module,
&music_opl_module,
NULL,
};
// Check if a sound device is in the given list of devices
static boolean SndDeviceInList(snddevice_t device, snddevice_t *list,
int len)
{
int i;
for (i=0; i<len; ++i)
{
if (device == list[i])
{
return true;
}
}
return false;
}
// Find and initialize a sound_module_t appropriate for the setting
// in snd_sfxdevice.
static void InitSfxModule(boolean use_sfx_prefix)
{
int i;
sound_module = NULL;
for (i=0; sound_modules[i] != NULL; ++i)
{
// Is the sfx device in the list of devices supported by
// this module?
if (SndDeviceInList(snd_sfxdevice,
sound_modules[i]->sound_devices,
sound_modules[i]->num_sound_devices))
{
// Initialize the module
if (sound_modules[i]->Init(use_sfx_prefix))
{
sound_module = sound_modules[i];
return;
}
}
}
}
// Initialize music according to snd_musicdevice.
static void InitMusicModule(void)
{
int i;
music_module = NULL;
for (i=0; music_modules[i] != NULL; ++i)
{
// Is the music device in the list of devices supported
// by this module?
if (SndDeviceInList(snd_musicdevice,
music_modules[i]->sound_devices,
music_modules[i]->num_sound_devices))
{
// Initialize the module
if (music_modules[i]->Init())
{
music_module = music_modules[i];
return;
}
}
}
}
//
// Initializes sound stuff, including volume
// Sets channels, SFX and music volume,
// allocates channel buffer, sets S_sfx lookup.
//
void I_InitSound(boolean use_sfx_prefix)
{
boolean nosound, nosfx, nomusic, nomusicpacks;
//!
// @vanilla
//
// Disable all sound output.
//
nosound = M_CheckParm("-nosound") > 0;
//!
// @vanilla
//
// Disable sound effects.
//
nosfx = M_CheckParm("-nosfx") > 0;
//!
// @vanilla
//
// Disable music.
//
nomusic = M_CheckParm("-nomusic") > 0;
//!
//
// Disable substitution music packs.
//
nomusicpacks = M_ParmExists("-nomusicpacks");
// Auto configure the music pack directory.
M_SetMusicPackDir();
// Initialize the sound and music subsystems.
if (!nosound && !screensaver_mode)
{
// This is kind of a hack. If native MIDI is enabled, set up
// the TIMIDITY_CFG environment variable here before SDL_mixer
// is opened.
if (!nomusic
&& (snd_musicdevice == SNDDEVICE_GENMIDI
|| snd_musicdevice == SNDDEVICE_GUS))
{
I_InitTimidityConfig();
}
if (!nosfx)
{
InitSfxModule(use_sfx_prefix);
}
if (!nomusic)
{
InitMusicModule();
active_music_module = music_module;
}
// We may also have substitute MIDIs we can load.
if (!nomusicpacks && music_module != NULL)
{
music_packs_active = music_pack_module.Init();
}
}
}
void I_ShutdownSound(void)
{
if (sound_module != NULL)
{
sound_module->Shutdown();
}
if (music_packs_active)
{
music_pack_module.Shutdown();
}
if (music_module != NULL)
{
music_module->Shutdown();
}
}
int I_GetSfxLumpNum(sfxinfo_t *sfxinfo)
{
if (sound_module != NULL)
{
return sound_module->GetSfxLumpNum(sfxinfo);
}
else
{
return 0;
}
}
void I_UpdateSound(void)
{
if (sound_module != NULL)
{
sound_module->Update();
}
if (active_music_module != NULL && active_music_module->Poll != NULL)
{
active_music_module->Poll();
}
}
static void CheckVolumeSeparation(int *vol, int *sep)
{
if (*sep < 0)
{
*sep = 0;
}
else if (*sep > 254)
{
*sep = 254;
}
if (*vol < 0)
{
*vol = 0;
}
else if (*vol > 127)
{
*vol = 127;
}
}
void I_UpdateSoundParams(int channel, int vol, int sep)
{
if (sound_module != NULL)
{
CheckVolumeSeparation(&vol, &sep);
sound_module->UpdateSoundParams(channel, vol, sep);
}
}
int I_StartSound(sfxinfo_t *sfxinfo, int channel, int vol, int sep, int pitch)
{
if (sound_module != NULL)
{
CheckVolumeSeparation(&vol, &sep);
return sound_module->StartSound(sfxinfo, channel, vol, sep, pitch);
}
else
{
return 0;
}
}
void I_StopSound(int channel)
{
if (sound_module != NULL)
{
sound_module->StopSound(channel);
}
}
boolean I_SoundIsPlaying(int channel)
{
if (sound_module != NULL)
{
return sound_module->SoundIsPlaying(channel);
}
else
{
return false;
}
}
void I_PrecacheSounds(sfxinfo_t *sounds, int num_sounds)
{
if (sound_module != NULL && sound_module->CacheSounds != NULL)
{
sound_module->CacheSounds(sounds, num_sounds);
}
}
void I_InitMusic(void)
{
}
void I_ShutdownMusic(void)
{
}
void I_SetMusicVolume(int volume)
{
if (active_music_module != NULL)
{
active_music_module->SetMusicVolume(volume);
}
}
void I_PauseSong(void)
{
if (active_music_module != NULL)
{
active_music_module->PauseMusic();
}
}
void I_ResumeSong(void)
{
if (active_music_module != NULL)
{
active_music_module->ResumeMusic();
}
}
void *I_RegisterSong(void *data, int len)
{
// If the music pack module is active, check to see if there is a
// valid substitution for this track. If there is, we set the
// active_music_module pointer to the music pack module for the
// duration of this particular track.
if (music_packs_active)
{
void *handle;
handle = music_pack_module.RegisterSong(data, len);
if (handle != NULL)
{
active_music_module = &music_pack_module;
return handle;
}
}
// No substitution for this track, so use the main module.
active_music_module = music_module;
if (active_music_module != NULL)
{
return active_music_module->RegisterSong(data, len);
}
else
{
return NULL;
}
}
void I_UnRegisterSong(void *handle)
{
if (active_music_module != NULL)
{
active_music_module->UnRegisterSong(handle);
}
}
void I_PlaySong(void *handle, boolean looping)
{
if (active_music_module != NULL)
{
active_music_module->PlaySong(handle, looping);
}
}
void I_StopSong(void)
{
if (active_music_module != NULL)
{
active_music_module->StopSong();
}
}
boolean I_MusicIsPlaying(void)
{
if (active_music_module != NULL)
{
return active_music_module->MusicIsPlaying();
}
else
{
return false;
}
}
void I_BindSoundVariables(void)
{
extern char *snd_dmxoption;
extern int use_libsamplerate;
extern float libsamplerate_scale;
M_BindIntVariable("snd_musicdevice", &snd_musicdevice);
M_BindIntVariable("snd_sfxdevice", &snd_sfxdevice);
M_BindIntVariable("snd_sbport", &snd_sbport);
M_BindIntVariable("snd_sbirq", &snd_sbirq);
M_BindIntVariable("snd_sbdma", &snd_sbdma);
M_BindIntVariable("snd_mport", &snd_mport);
M_BindIntVariable("snd_maxslicetime_ms", &snd_maxslicetime_ms);
M_BindStringVariable("snd_musiccmd", &snd_musiccmd);
M_BindStringVariable("snd_dmxoption", &snd_dmxoption);
M_BindIntVariable("snd_samplerate", &snd_samplerate);
M_BindIntVariable("snd_cachesize", &snd_cachesize);
M_BindIntVariable("opl_io_port", &opl_io_port);
M_BindIntVariable("snd_pitchshift", &snd_pitchshift);
M_BindStringVariable("music_pack_path", &music_pack_path);
M_BindStringVariable("timidity_cfg_path", &timidity_cfg_path);
M_BindStringVariable("gus_patch_path", &gus_patch_path);
M_BindIntVariable("gus_ram_kb", &gus_ram_kb);
M_BindIntVariable("use_libsamplerate", &use_libsamplerate);
M_BindFloatVariable("libsamplerate_scale", &libsamplerate_scale);
}