quakeforge/libs/audio/cd_sdl.c

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/*
cd_sdl.c
SDL CD audio routines
Copyright (C) 1996-1997 Id Software, Inc.
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.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <SDL.h>
#include "QF/cdaudio.h"
#include "QF/cmd.h"
#include "QF/cvar.h"
#include "QF/qargs.h"
#include "QF/sound.h"
#include "QF/sys.h"
#include "QF/plugin/general.h"
#include "QF/plugin/cd.h"
#include "compat.h"
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static plugin_t plugin_info;
static plugin_data_t plugin_info_data;
static plugin_funcs_t plugin_info_funcs;
static general_data_t plugin_info_general_data;
static general_funcs_t plugin_info_general_funcs;
static cd_funcs_t plugin_info_cd_funcs;
static bool cdValid = false;
static bool initialized = false;
static bool enabled = true;
static bool playLooping = false;
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static SDL_CD *cd_id;
static float cdvolume = 1.0;
static float bgmvolume;
static cvar_t bgmvolume_cvar = {
.name = "bgmvolume",
.description =
"Volume of CD music",
.default_value = "1",
.flags = CVAR_ARCHIVE,
.value = { .type = &cexpr_float, .value = &bgmvolume },
};
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static void
I_CDAudio_Eject (void)
{
if (!cd_id || !enabled)
return;
if (SDL_CDEject (cd_id))
Sys_MaskPrintf (SYS_snd, "Unable to eject CD-ROM tray.\n");
}
static void
I_CDAudio_Pause (void)
{
if (!cd_id || !enabled)
return;
if (SDL_CDStatus (cd_id) != CD_PLAYING)
return;
if (SDL_CDPause (cd_id))
Sys_MaskPrintf (SYS_snd, "CDAudio_Pause: Failed to pause track.\n");
}
static void
I_CDAudio_Stop (void)
{
int cdstate;
if (!cd_id || !enabled)
return;
cdstate = SDL_CDStatus (cd_id);
if ((cdstate != CD_PLAYING) && (cdstate != CD_PAUSED))
return;
if (SDL_CDStop (cd_id))
Sys_MaskPrintf (SYS_snd, "CDAudio_Stop: Failed to stop track.\n");
}
static void
I_CDAudio_Play (int track, bool looping)
{
/* Initialize cd_stat to avoid warning */
/* XXX - Does this default value make sense? */
CDstatus cd_stat = CD_ERROR;
if (!cd_id || !enabled)
return;
if (!cdValid) {
cd_stat = SDL_CDStatus (cd_id);
if (!CD_INDRIVE (cd_stat) || (!cd_id->numtracks))
return;
cdValid = true;
}
if ((track < 1) || (track >= cd_id->numtracks)) {
I_CDAudio_Stop ();
return;
}
track--; // Convert track from person to SDL value
if (cd_stat == CD_PLAYING) {
if (cd_id->cur_track == track)
return;
I_CDAudio_Stop ();
}
if (SDL_CDPlay (cd_id, cd_id->track[track].offset,
cd_id->track[track].length)) {
Sys_MaskPrintf (SYS_snd, "CDAudio_Play: Unable to play track: %d\n",
track + 1);
return;
}
playLooping = looping;
}
static void
I_CDAudio_Resume (void)
{
if (!cd_id || !enabled)
return;
if (SDL_CDStatus (cd_id) != CD_PAUSED)
return;
if (SDL_CDResume (cd_id))
Sys_MaskPrintf (SYS_snd, "CDAudio_Resume: Failed to resume track.\n");
}
static void
I_CDAudio_Shutdown (void)
{
if (!cd_id)
return;
I_CDAudio_Stop ();
SDL_CDClose (cd_id);
cd_id = NULL;
}
static void
I_CDAudio_Update (void)
{
if (!cd_id || !enabled)
return;
if (bgmvolume != cdvolume) {
if (cdvolume) {
bgmvolume = 0.0;
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I_CDAudio_Pause ();
} else {
bgmvolume = 1.0;
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I_CDAudio_Resume ();
}
cdvolume = bgmvolume;
return;
}
if (playLooping && (SDL_CDStatus (cd_id) != CD_PLAYING)
&& (SDL_CDStatus (cd_id) != CD_PAUSED))
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I_CDAudio_Play (cd_id->cur_track + 1, true);
}
#define CD_f_DEFINED
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static void
I_CD_f (void)
{
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const char *command;
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int cdstate;
if (Cmd_Argc () < 2)
return;
command = Cmd_Argv (1);
if (strequal (command, "on")) {
enabled = true;
}
if (strequal (command, "off")) {
if (!cd_id)
return;
cdstate = SDL_CDStatus (cd_id);
if ((cdstate == CD_PLAYING) || (cdstate == CD_PAUSED))
I_CDAudio_Stop ();
enabled = false;
return;
}
if (strequal (command, "play")) {
I_CDAudio_Play (atoi (Cmd_Argv (2)), false);
return;
}
if (strequal (command, "loop")) {
I_CDAudio_Play (atoi (Cmd_Argv (2)), true);
return;
}
if (strequal (command, "stop")) {
I_CDAudio_Stop ();
return;
}
if (strequal (command, "pause")) {
I_CDAudio_Pause ();
return;
}
if (strequal (command, "resume")) {
I_CDAudio_Resume ();
return;
}
if (strequal (command, "eject")) {
I_CDAudio_Eject ();
return;
}
if (strequal (command, "info")) {
if (!cd_id)
return;
cdstate = SDL_CDStatus (cd_id);
Sys_Printf ("%d tracks\n", cd_id->numtracks);
if (cdstate == CD_PLAYING)
Sys_Printf ("Currently %s track %d\n",
playLooping ? "looping" : "playing",
cd_id->cur_track + 1);
else if (cdstate == CD_PAUSED)
Sys_Printf ("Paused %s track %d\n",
playLooping ? "looping" : "playing",
cd_id->cur_track + 1);
return;
}
}
static void
I_CDAudio_Init (void)
{
if (SDL_Init (SDL_INIT_CDROM) < 0) {
Sys_Printf ("Couldn't initialize SDL CD-AUDIO: %s\n", SDL_GetError ());
return; // was -1
}
cd_id = SDL_CDOpen (0);
if (!cd_id) {
Sys_Printf ("CDAudio_Init: Unable to open default CD-ROM drive: %s\n",
SDL_GetError ());
return; // was -1
}
initialized = true;
enabled = true;
cdValid = true;
if (!CD_INDRIVE (SDL_CDStatus (cd_id))) {
Sys_Printf ("CDAudio_Init: No CD in drive.\n");
cdValid = false;
}
if (!cd_id->numtracks) {
Sys_Printf ("CDAudio_Init: CD contains no audio tracks.\n");
cdValid = false;
}
Cvar_Register (&bgmvolume_cvar, 0, 0);
Sys_Printf ("CD Audio Initialized.\n");
}
static general_funcs_t plugin_info_general_funcs = {
I_CDAudio_Init,
I_CDAudio_Shutdown,
};
static cd_funcs_t plugin_info_cd_funcs = {
0,
I_CD_f,
I_CDAudio_Pause,
I_CDAudio_Play,
I_CDAudio_Resume,
I_CDAudio_Update,
};
static plugin_funcs_t plugin_info_funcs = {
&plugin_info_general_funcs,
0,
&plugin_info_cd_funcs,
0,
0,
0,
};
static plugin_data_t plugin_info_data = {
&plugin_info_general_data,
0,
0,
0,
0,
0,
};
static plugin_t plugin_info = {
qfp_cd,
0,
QFPLUGIN_VERSION,
"0.1",
"SDL CD Audio output\n",
"Copyright (C) 2001 contributors of the QuakeForge project\n"
"Please see the file \"AUTHORS\" for a list of contributors\n",
&plugin_info_funcs,
&plugin_info_data,
};
PLUGIN_INFO (cd, sdl)
{
return &plugin_info;
}