quakespasm/Quake/cd_sdl.c

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/*
cd_sdl.c
Copyright (C) 1996-1997 Id Software, Inc.
Taken from the Twilight project with modifications
to make it work with Hexen II: Hammer of Thyrion.
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.
51 Franklin St, Fifth Floor,
Boston, MA 02110-1301 USA
*/
#include "SDL.h"
#ifndef SDL_INIT_CDROM
/* SDL dropped support for
cd audio since v1.3.0 */
#warning SDL CDAudio support disabled
#include "cd_null.c"
#else /* SDL_INIT_CDROM */
#include "quakedef.h"
static qboolean enabled = false;
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static qboolean cdValid = false;
static qboolean playing = false;
static qboolean wasPlaying = false;
static qboolean playLooping = false;
static byte playTrack;
static double endOfTrack = -1.0, pausetime = -1.0;
static SDL_CD *cd_handle;
static int cd_dev = -1;
static float old_cdvolume;
static qboolean hw_vol_works = true;
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void CDAudioBackend_Eject(void)
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{
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if (!cd_handle)
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return;
if (SDL_CDEject(cd_handle) == -1)
Con_Printf ("Unable to eject CD-ROM: %s\n", SDL_GetError ());
}
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static int CDAudioBackend_GetAudioDiskInfo(void)
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{
cdValid = false;
if (!cd_handle)
return -1;
if ( ! CD_INDRIVE(SDL_CDStatus(cd_handle)) )
return -1;
cdValid = true;
return 0;
}
qboolean CDAudioBackend_IsPlaying()
{
return playing;
}
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void CDAudioBackend_Play(byte track, qboolean looping)
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{
int len_m, len_s, len_f;
if (!cd_handle || !enabled)
return;
if (!cdValid)
{
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CDAudioBackend_GetAudioDiskInfo();
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if (!cdValid)
return;
}
if (track < 1 || track > cd_handle->numtracks)
{
Con_Printf ("CDAudioBackend_Play: Bad track number %d.\n", track);
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return;
}
if (cd_handle->track[track-1].type == SDL_DATA_TRACK)
{
Con_Printf ("CDAudioBackend_Play: track %d is not audio\n", track);
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return;
}
if (playing)
{
if (playTrack == track)
return;
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CDAudioBackend_Stop ();
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}
if (SDL_CDPlay(cd_handle, cd_handle->track[track-1].offset, cd_handle->track[track-1].length) == -1)
{
// ok, check for status now
int cd_status = SDL_CDStatus(cd_handle);
if (cd_status > 0)
Con_Printf ("CDAudioBackend_Play: Unable to play %d: %s\n", track, SDL_GetError ());
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return;
}
playLooping = looping;
playTrack = track;
playing = true;
FRAMES_TO_MSF(cd_handle->track[track-1].length, &len_m, &len_s, &len_f);
endOfTrack = realtime + ((double)len_m * 60.0) + (double)len_s + (double)len_f / (double)CD_FPS;
/*
* Add the pregap for the next track. This means that disc-at-once CDs
* won't loop smoothly, but they wouldn't anyway so it doesn't really
* matter. SDL doesn't give us pregap information anyway, so you'll
* just have to live with it.
*/
endOfTrack += 2.0;
pausetime = -1.0;
if (!hw_vol_works && bgmvolume.value == 0.0)
CDAudioBackend_Pause ();
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}
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void CDAudioBackend_Stop(void)
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{
if (!cd_handle || !enabled)
return;
if (!playing)
return;
if (SDL_CDStop(cd_handle) == -1)
Con_Printf ("CDAudioBackend_Stop: Unable to stop CD-ROM (%s)\n", SDL_GetError());
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wasPlaying = false;
playing = false;
pausetime = -1.0;
endOfTrack = -1.0;
}
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void CDAudioBackend_Next(void)
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{
byte track;
if (!cd_handle || !enabled)
return;
if (!playing)
return;
track = playTrack + 1; /* cd_handle->track[cd_handle->cur_track].id + 1; */
if (track > cd_handle->numtracks)
track = 1;
CDAudioBackend_Play (track, playLooping);
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}
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void CDAudioBackend_Prev(void)
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{
byte track;
if (!cd_handle || !enabled)
return;
if (!playing)
return;
track = playTrack - 1;
if (track < 1)
track = cd_handle->numtracks;
CDAudioBackend_Play (track, playLooping);
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}
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void CDAudioBackend_Pause(void)
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{
if (!cd_handle || !enabled)
return;
if (!playing)
return;
if (SDL_CDPause(cd_handle) == -1)
Con_Printf ("Unable to pause CD-ROM: %s\n", SDL_GetError());
wasPlaying = playing;
playing = false;
pausetime = realtime;
}
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void CDAudioBackend_Resume(void)
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{
if (!cd_handle || !enabled)
return;
if (!cdValid)
return;
if (!wasPlaying)
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return;
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if (SDL_CDResume(cd_handle) == -1)
Con_Printf ("Unable to resume CD-ROM: %s\n", SDL_GetError());
playing = true;
endOfTrack += realtime - pausetime;
pausetime = -1.0;
}
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void CDAudioBackend_Info()
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{
int current_min, current_sec, current_frame;
int length_min, length_sec, length_frame;
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Con_Printf ("%u tracks\n", cd_handle->numtracks);
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if (playing)
Con_Printf ("Currently %s track %u\n", playLooping ? "looping" : "playing", playTrack);
else if (wasPlaying)
Con_Printf ("Paused %s track %u\n", playLooping ? "looping" : "playing", playTrack);
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if (playing || wasPlaying)
{
SDL_CDStatus(cd_handle);
FRAMES_TO_MSF(cd_handle->cur_frame, &current_min, &current_sec, &current_frame);
FRAMES_TO_MSF(cd_handle->track[playTrack-1].length, &length_min, &length_sec, &length_frame);
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Con_Printf ("Current position: %d:%02d.%02d (of %d:%02d.%02d)\n",
current_min, current_sec, current_frame * 60 / CD_FPS,
length_min, length_sec, length_frame * 60 / CD_FPS);
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}
Con_Printf ("Volume is %f\n", bgmvolume.value);
return;
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}
static qboolean CD_GetVolume (void *unused)
{
/* FIXME: write proper code in here when SDL
supports cdrom volume control some day. */
return false;
}
static qboolean CD_SetVolume (void *unused)
{
/* FIXME: write proper code in here when SDL
supports cdrom volume control some day. */
return false;
}
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static qboolean CDAudioBackend_SetVolume (cvar_t *var)
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{
if (!cd_handle || !enabled)
return false;
if (var->value < 0.0)
Cvar_SetValue (var->name, 0.0);
else if (var->value > 1.0)
Cvar_SetValue (var->name, 1.0);
old_cdvolume = var->value;
if (hw_vol_works)
{
/* FIXME: write proper code in here when SDL
supports cdrom volume control some day. */
return CD_SetVolume (NULL);
}
else
{
if (old_cdvolume == 0.0)
CDAudioBackend_Pause ();
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else
CDAudioBackend_Resume();
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return false;
}
}
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void CDAudioBackend_Update(void)
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{
CDstatus curstat;
if (!cd_handle || !enabled)
return;
if (old_cdvolume != bgmvolume.value)
CDAudioBackend_SetVolume (&bgmvolume);
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if (playing && realtime > endOfTrack)
{
// curstat = cd_handle->status;
curstat = SDL_CDStatus(cd_handle);
if (curstat != CD_PLAYING && curstat != CD_PAUSED)
{
endOfTrack = -1.0;
if (playLooping) {
playing = false;
CDAudioBackend_Play(playTrack, true);
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}
else
CDAudioBackend_Next();
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}
}
}
static const char *get_cddev_arg (const char *arg)
{
#if defined(_WIN32)
/* arg should be like "D:\", make sure it is so,
* but tolerate args like "D" or "D:", as well. */
static char drive[4];
if (!arg || ! *arg)
return NULL;
if (arg[1] != '\0')
{
if (arg[1] != ':')
return NULL;
if (arg[2] != '\0')
{
if (arg[2] != '\\' &&
arg[2] != '/')
return NULL;
if (arg[3] != '\0')
return NULL;
}
}
if (*arg >= 'A' && *arg <= 'Z')
{
drive[0] = *arg;
drive[1] = ':';
drive[2] = '\\';
drive[3] = '\0';
return drive;
}
else if (*arg >= 'a' && *arg <= 'z')
{
/* make it uppercase for SDL */
drive[0] = *arg - ('a' - 'A');
drive[1] = ':';
drive[2] = '\\';
drive[3] = '\0';
return drive;
}
return NULL;
#else
if (!arg || ! *arg)
return NULL;
return arg;
#endif
}
static void export_cddev_arg (void)
{
/* Bad ugly hack to workaround SDL's cdrom device detection.
* not needed for windows due to the way SDL_cdrom works. */
#if !defined(_WIN32)
int i = COM_CheckParm("-cddev");
if (i != 0 && i < com_argc - 1 && com_argv[i+1][0] != '\0')
{
static char arg[64];
q_snprintf(arg, sizeof(arg), "SDL_CDROM=%s", com_argv[i+1]);
putenv(arg);
}
#endif
}
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int CDAudioBackend_Init(void)
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{
int i, sdl_num_drives;
if (safemode || COM_CheckParm("-nocdaudio"))
return -1;
export_cddev_arg();
if (SDL_InitSubSystem(SDL_INIT_CDROM) == -1)
{
Con_Printf("Couldn't init SDL cdrom: %s\n", SDL_GetError());
return -1;
}
sdl_num_drives = SDL_CDNumDrives ();
Con_Printf ("SDL detected %d CD-ROM drive%c\n", sdl_num_drives,
sdl_num_drives == 1 ? ' ' : 's');
if (sdl_num_drives < 1)
return -1;
if ((i = COM_CheckParm("-cddev")) != 0 && i < com_argc - 1)
{
const char *userdev = get_cddev_arg(com_argv[i+1]);
if (!userdev)
{
Con_Printf("Invalid argument to -cddev\n");
return -1;
}
for (i = 0; i < sdl_num_drives; i++)
{
if (!Q_strcasecmp(SDL_CDName(i), userdev))
{
cd_dev = i;
break;
}
}
if (cd_dev == -1)
{
Con_Printf("SDL couldn't find cdrom device %s\n", userdev);
return -1;
}
}
if (cd_dev == -1)
cd_dev = 0; // default drive
cd_handle = SDL_CDOpen(cd_dev);
if (!cd_handle)
{
Con_Printf ("CDAudioBackend_Init: Unable to open CD-ROM drive %s (%s)\n",
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SDL_CDName(cd_dev), SDL_GetError());
return -1;
}
enabled = true;
old_cdvolume = bgmvolume.value;
Con_Printf("CDAudio initialized (SDL, using %s)\n", SDL_CDName(cd_dev));
if (CDAudioBackend_GetAudioDiskInfo())
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{
Con_Printf("CDAudioBackend_Init: No CD in drive\n");
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cdValid = false;
}
// cd hardware volume: no SDL support at present.
hw_vol_works = CD_GetVolume (NULL);
if (hw_vol_works)
hw_vol_works = CDAudioBackend_SetVolume (&bgmvolume);
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return 0;
}
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void CDAudioBackend_Shutdown(void)
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{
if (!cd_handle)
return;
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CDAudioBackend_Stop();
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// cd hardware volume: no SDL support at present.
// if (hw_vol_works)
// CD_SetVolume (NULL);
SDL_CDClose(cd_handle);
cd_handle = NULL;
cd_dev = -1;
SDL_QuitSubSystem(SDL_INIT_CDROM);
}
#endif /* SDL_INIT_CDROM */