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spingle/source/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 the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <SDL.h>
#ifndef SDL_INIT_CDROM
/* SDL dropped support for
cd audio since v1.3.0 */
#pragma message("Warning: SDL CDAudio support disabled")
#include "cd_null.c"
#else /* SDL_INIT_CDROM */
#include "quakedef.h"
static qboolean cdValid = false;
static qboolean playing = false;
static qboolean wasPlaying = false;
static qboolean enabled = true;
static qboolean playLooping = false;
static byte remap[100];
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;
static void CDAudio_Eject(void)
{
if (!cd_handle || !enabled)
return;
#ifdef __linux__
SDL_CDStop(cd_handle); /* see CDAudio_Stop() */
#endif
if (SDL_CDEject(cd_handle) < 0)
Con_Printf ("Unable to eject CD-ROM: %s\n", SDL_GetError ());
}
static int CDAudio_GetAudioDiskInfo(void)
{
cdValid = false;
if (!cd_handle)
return -1;
if ( ! CD_INDRIVE(SDL_CDStatus(cd_handle)) )
return -1;
cdValid = true;
return 0;
}
int CDAudio_Play(byte track, qboolean looping)
{
int len_m, len_s, len_f;
if (!cd_handle || !enabled)
return -1;
if (!cdValid)
{
CDAudio_GetAudioDiskInfo();
if (!cdValid)
return -1;
}
track = remap[track];
if (track < 1 || track > cd_handle->numtracks)
{
Con_Printf ("CDAudio_Play: Bad track number %d.\n", track);
return -1;
}
if (cd_handle->track[track-1].type == SDL_DATA_TRACK)
{
Con_Printf ("CDAudio_Play: track %d is not audio\n", track);
return -1;
}
if (playing)
{
if (playTrack == track)
return 0;
CDAudio_Stop();
}
if (SDL_CDPlay(cd_handle, cd_handle->track[track-1].offset, cd_handle->track[track-1].length) < 0)
{
Con_Printf ("CDAudio_Play: Unable to play track %d: %s\n", track, SDL_GetError ());
return -1;
}
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 (bgmvolume.value == 0) /* don't bother advancing */
CDAudio_Pause ();
return 0;
}
void CDAudio_Stop(void)
{
if (!cd_handle || !enabled)
return;
if (!playing)
return;
#ifdef __linux__
/* Don't really stop, but just pause: On some devices, the CDROMSTOP
* ioctl causes any followup ioctls to fail for a considerable time.
* observed with a TSSTcorp CDW/DVD SH-M522C drive with TS05 and TS08
* firmware versions running under a 2.6.27.25 kernel, and with a
* Samsung DVD r/w drive running under 2.6.35.6 kernel.
* Therefore, avoid dead stops if playback may be resumed shortly. */
if (SDL_CDPause(cd_handle) < 0)
Con_Printf ("CDAudio_Stop: Unable to stop CD-ROM (%s)\n", SDL_GetError());
#else
if (SDL_CDStop(cd_handle) < 0)
Con_Printf ("CDAudio_Stop: Unable to stop CD-ROM (%s)\n", SDL_GetError());
#endif
wasPlaying = false;
playing = false;
pausetime = -1.0;
endOfTrack = -1.0;
}
void CDAudio_Pause(void)
{
if (!cd_handle || !enabled)
return;
if (!playing)
return;
if (SDL_CDPause(cd_handle) < 0)
Con_Printf ("Unable to pause CD-ROM: %s\n", SDL_GetError());
wasPlaying = playing;
playing = false;
pausetime = realtime;
}
void CDAudio_Resume(void)
{
if (!cd_handle || !enabled)
return;
if (!cdValid)
return;
if (!wasPlaying)
return;
if (SDL_CDResume(cd_handle) < 0)
Con_Printf ("Unable to resume CD-ROM: %s\n", SDL_GetError());
playing = true;
endOfTrack += realtime - pausetime;
pausetime = -1.0;
}
static int get_first_audiotrk (void)
{
int i;
for (i = 0; i < cd_handle->numtracks; ++i)
if (cd_handle->track[i].type != SDL_DATA_TRACK)
return ++i;
return 1;
}
static void CD_f (void)
{
const char *command;
int ret, n;
if (Cmd_Argc() < 2)
{
Con_Printf("commands:");
Con_Printf("on, off, reset, remap, \n");
Con_Printf("play, stop, loop, pause, resume\n");
Con_Printf("eject, info, next, prev\n");
return;
}
command = Cmd_Argv (1);
if (q_strcasecmp(command, "on") == 0)
{
enabled = true;
return;
}
if (q_strcasecmp(command, "off") == 0)
{
if (playing)
CDAudio_Stop();
enabled = false;
return;
}
if (q_strcasecmp(command, "reset") == 0)
{
enabled = true;
if (playing)
CDAudio_Stop();
for (n = 0; n < 100; n++)
remap[n] = n;
CDAudio_GetAudioDiskInfo();
return;
}
if (q_strcasecmp(command, "remap") == 0)
{
ret = Cmd_Argc() - 2;
if (ret <= 0)
{
for (n = 1; n < 100; n++)
if (remap[n] != n)
Con_Printf(" %u -> %u\n", n, remap[n]);
return;
}
for (n = 1; n <= ret; n++)
remap[n] = atoi(Cmd_Argv (n + 1));
return;
}
if (!cdValid)
{
CDAudio_GetAudioDiskInfo();
if (!cdValid)
{
Con_Printf("No CD in player.\n");
return;
}
}
if (q_strcasecmp(command, "play") == 0)
{
n = atoi(Cmd_Argv (2));
if (n == 0)
n = 1;
CDAudio_Play((byte)n, false);
return;
}
if (q_strcasecmp(command, "loop") == 0)
{
CDAudio_Play((byte)atoi(Cmd_Argv (2)), true);
return;
}
if (q_strcasecmp(command, "stop") == 0)
{
CDAudio_Stop();
return;
}
if (q_strcasecmp(command, "pause") == 0)
{
CDAudio_Pause();
return;
}
if (q_strcasecmp(command, "resume") == 0)
{
CDAudio_Resume();
return;
}
if (q_strcasecmp(command, "eject") == 0)
{
if (playing)
CDAudio_Stop();
CDAudio_Eject();
cdValid = false;
return;
}
if (q_strcasecmp(command, "info") == 0)
{
int current_min, current_sec, current_frame;
int length_min, length_sec, length_frame;
Con_Printf ("%u tracks\n", cd_handle->numtracks);
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);
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);
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);
}
Con_Printf("Volume is %f\n", bgmvolume.value);
return;
}
if (q_strcasecmp(command, "next") == 0)
{
if (playTrack == cd_handle->numtracks)
playTrack = get_first_audiotrk() - 1;
CDAudio_Play(playTrack + 1, playLooping);
return;
}
if (q_strcasecmp(command, "prev") == 0)
{
if (playTrack == get_first_audiotrk())
playTrack = cd_handle->numtracks + 1;
CDAudio_Play(playTrack - 1, playLooping);
return;
}
Con_Printf ("cd: unknown command \"%s\"\n", command);
}
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;
}
static qboolean CDAudio_SetVolume (float value)
{
if (!cd_handle || !enabled)
return false;
old_cdvolume = value;
if (value == 0.0f)
CDAudio_Pause ();
else
CDAudio_Resume();
if (!hw_vol_works)
{
return false;
}
else
{
/* FIXME: write proper code in here when SDL
supports cdrom volume control some day. */
return CD_SetVolume (NULL);
}
}
void CDAudio_Update(void)
{
CDstatus curstat;
/* static double lastchk;*/
if (!cd_handle || !enabled)
return;
if (old_cdvolume != bgmvolume.value)
CDAudio_SetVolume (bgmvolume.value);
/* if (playing && realtime > lastchk)*/
if (playing && realtime > endOfTrack)
{
/* lastchk = realtime + 2;*/ /* two seconds between chks */
curstat = SDL_CDStatus(cd_handle);
if (curstat != CD_PLAYING && curstat != CD_PAUSED)
{
playing = false;
endOfTrack = -1.0;
if (playLooping)
CDAudio_Play(playTrack, true);
}
}
}
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
}
int CDAudio_Init(void)
{
int i, sdl_num_drives;
if (safemode || COM_CheckParm("-nocdaudio"))
return -1;
export_cddev_arg();
if (SDL_InitSubSystem(SDL_INIT_CDROM) < 0)
{
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 ("CDAudio_Init: Unable to open CD-ROM drive %s (%s)\n",
SDL_CDName(cd_dev), SDL_GetError());
return -1;
}
for (i = 0; i < 100; i++)
remap[i] = i;
enabled = true;
old_cdvolume = bgmvolume.value;
Con_Printf("CDAudio initialized (SDL, using %s)\n", SDL_CDName(cd_dev));
if (CDAudio_GetAudioDiskInfo())
{
Con_Printf("CDAudio_Init: No CD in drive\n");
cdValid = false;
}
Cmd_AddCommand ("cd", CD_f);
hw_vol_works = CD_GetVolume (NULL); /* no SDL support at present. */
if (hw_vol_works)
hw_vol_works = CDAudio_SetVolume (bgmvolume.value);
return 0;
}
void CDAudio_Shutdown(void)
{
if (!cd_handle)
return;
CDAudio_Stop();
if (hw_vol_works)
CD_SetVolume (NULL); /* no SDL support at present. */
#ifdef __linux__
SDL_CDStop(cd_handle); /* see CDAudio_Stop() */
#endif
SDL_CDClose(cd_handle);
cd_handle = NULL;
cd_dev = -1;
SDL_QuitSubSystem(SDL_INIT_CDROM);
}
#endif /* SDL_INIT_CDROM */
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