Mercurial > sdl-ios-xcode
view src/cdrom/SDL_cdrom.c @ 641:df178851293b
Date: 28 Jun 2003 22:42:52 +0100
From: Alan Swanson
Subject: Re: [SDL] New XFree 4.3 Video Mode Patch
I have a wee amendment that moves the qsort in set_best_resolution
to only occur after failing to find an exact match only. This would
make absolutely sure we get a user set mode.
While I've never had any problems for my normal resolutions (1280x1024,
1024x768, 800x600 & 640,480) while closely examining the output from
qsort I've noticed it doesn't seem to sort the modes fully. These is
one definite wrong at 1152x768 and a few that just look wrong to me.
From a program (attached) I made to examine this more easily. X has
sorted its mode list using the same method as ours (plus frequency),
and our user modes get inserted without any other movement.
On the patch I've made I've also changed cmpmodes to sort on vertical
resolution and then horizontal. Ie vertical is now most significant
bit.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sat, 28 Jun 2003 21:52:26 +0000 |
parents | f6ffac90895c |
children | b8d311d90021 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Sam Lantinga slouken@libsdl.org */ #ifdef SAVE_RCSID static char rcsid = "@(#) $Id$"; #endif /* This is the CD-audio control API for Simple DirectMedia Layer */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include "SDL_error.h" #include "SDL_cdrom.h" #include "SDL_syscdrom.h" #if !defined(macintosh) #define CLIP_FRAMES 10 /* Some CD-ROMs won't go all the way */ #endif static int SDL_cdinitted = 0; static SDL_CD *default_cdrom; /* The system level CD-ROM control functions */ struct CDcaps SDL_CDcaps = { NULL, /* Name */ NULL, /* Open */ NULL, /* GetTOC */ NULL, /* Status */ NULL, /* Play */ NULL, /* Pause */ NULL, /* Resume */ NULL, /* Stop */ NULL, /* Eject */ NULL, /* Close */ }; int SDL_numcds; int SDL_CDROMInit(void) { int retval; SDL_numcds = 0; retval = SDL_SYS_CDInit(); if ( retval == 0 ) { SDL_cdinitted = 1; } default_cdrom = NULL; return(retval); } /* Check to see if the CD-ROM subsystem has been initialized */ static int CheckInit(int check_cdrom, SDL_CD **cdrom) { int okay; okay = SDL_cdinitted; if ( check_cdrom && (*cdrom == NULL) ) { *cdrom = default_cdrom; if ( *cdrom == NULL ) { SDL_SetError("CD-ROM not opened"); okay = 0; } } if ( ! SDL_cdinitted ) { SDL_SetError("CD-ROM subsystem not initialized"); } return(okay); } int SDL_CDNumDrives(void) { if ( ! CheckInit(0, NULL) ) { return(-1); } return(SDL_numcds); } const char *SDL_CDName(int drive) { if ( ! CheckInit(0, NULL) ) { return(NULL); } if ( drive >= SDL_numcds ) { SDL_SetError("Invalid CD-ROM drive index"); return(NULL); } if ( SDL_CDcaps.Name ) { return(SDL_CDcaps.Name(drive)); } else { return(""); } } SDL_CD *SDL_CDOpen(int drive) { struct SDL_CD *cdrom; if ( ! CheckInit(0, NULL) ) { return(NULL); } if ( drive >= SDL_numcds ) { SDL_SetError("Invalid CD-ROM drive index"); return(NULL); } cdrom = (SDL_CD *)malloc(sizeof(*cdrom)); if ( cdrom == NULL ) { SDL_OutOfMemory(); return(NULL); } memset(cdrom, 0, sizeof(*cdrom)); cdrom->id = SDL_CDcaps.Open(drive); if ( cdrom->id < 0 ) { free(cdrom); return(NULL); } default_cdrom = cdrom; return(cdrom); } CDstatus SDL_CDStatus(SDL_CD *cdrom) { CDstatus status; int i; Uint32 position; /* Check if the CD-ROM subsystem has been initialized */ if ( ! CheckInit(1, &cdrom) ) { return(CD_ERROR); } /* Get the current status of the drive */ cdrom->numtracks = 0; cdrom->cur_track = 0; cdrom->cur_frame = 0; status = SDL_CDcaps.Status(cdrom, &i); position = (Uint32)i; cdrom->status = status; /* Get the table of contents, if there's a CD available */ if ( CD_INDRIVE(status) ) { if ( SDL_CDcaps.GetTOC(cdrom) < 0 ) { status = CD_ERROR; } /* If the drive is playing, get current play position */ if ( (status == CD_PLAYING) || (status == CD_PAUSED) ) { for ( i=1; cdrom->track[i].offset <= position; ++i ) { /* Keep looking */; } #ifdef DEBUG_CDROM fprintf(stderr, "Current position: %d, track = %d (offset is %d)\n", position, i-1, cdrom->track[i-1].offset); #endif cdrom->cur_track = i-1; position -= cdrom->track[cdrom->cur_track].offset; cdrom->cur_frame = position; } } return(status); } int SDL_CDPlayTracks(SDL_CD *cdrom, int strack, int sframe, int ntracks, int nframes) { int etrack, eframe; int start, length; /* Check if the CD-ROM subsystem has been initialized */ if ( ! CheckInit(1, &cdrom) ) { return(CD_ERROR); } /* Determine the starting and ending tracks */ if ( (strack < 0) || (strack >= cdrom->numtracks) ) { SDL_SetError("Invalid starting track"); return(CD_ERROR); } if ( ! ntracks && ! nframes ) { etrack = cdrom->numtracks; eframe = 0; } else { etrack = strack+ntracks; if ( etrack == strack ) { eframe = sframe + nframes; } else { eframe = nframes; } } if ( etrack > cdrom->numtracks ) { SDL_SetError("Invalid play length"); return(CD_ERROR); } /* Skip data tracks and verify frame offsets */ while ( (strack <= etrack) && (cdrom->track[strack].type == SDL_DATA_TRACK) ) { ++strack; } if ( sframe >= (int)cdrom->track[strack].length ) { SDL_SetError("Invalid starting frame for track %d", strack); return(CD_ERROR); } while ( (etrack > strack) && (cdrom->track[etrack-1].type == SDL_DATA_TRACK) ) { --etrack; } if ( eframe > (int)cdrom->track[etrack].length ) { SDL_SetError("Invalid ending frame for track %d", etrack); return(CD_ERROR); } /* Determine start frame and play length */ start = (cdrom->track[strack].offset+sframe); length = (cdrom->track[etrack].offset+eframe)-start; #ifdef CLIP_FRAMES /* I've never seen this necessary, but xmcd does it.. */ length -= CLIP_FRAMES; /* CLIP_FRAMES == 10 */ #endif if ( length < 0 ) { return(0); } /* Play! */ #ifdef DEBUG_CDROM fprintf(stderr, "Playing %d frames at offset %d\n", length, start); #endif return(SDL_CDcaps.Play(cdrom, start, length)); } int SDL_CDPlay(SDL_CD *cdrom, int sframe, int length) { /* Check if the CD-ROM subsystem has been initialized */ if ( ! CheckInit(1, &cdrom) ) { return(CD_ERROR); } return(SDL_CDcaps.Play(cdrom, sframe, length)); } int SDL_CDPause(SDL_CD *cdrom) { CDstatus status; int retval; /* Check if the CD-ROM subsystem has been initialized */ if ( ! CheckInit(1, &cdrom) ) { return(CD_ERROR); } status = SDL_CDcaps.Status(cdrom, NULL); switch (status) { case CD_PLAYING: retval = SDL_CDcaps.Pause(cdrom); break; default: retval = 0; break; } return(retval); } int SDL_CDResume(SDL_CD *cdrom) { CDstatus status; int retval; /* Check if the CD-ROM subsystem has been initialized */ if ( ! CheckInit(1, &cdrom) ) { return(CD_ERROR); } status = SDL_CDcaps.Status(cdrom, NULL); switch (status) { case CD_PAUSED: retval = SDL_CDcaps.Resume(cdrom); default: retval = 0; break; } return(retval); } int SDL_CDStop(SDL_CD *cdrom) { CDstatus status; int retval; /* Check if the CD-ROM subsystem has been initialized */ if ( ! CheckInit(1, &cdrom) ) { return(CD_ERROR); } status = SDL_CDcaps.Status(cdrom, NULL); switch (status) { case CD_PLAYING: case CD_PAUSED: retval = SDL_CDcaps.Stop(cdrom); default: retval = 0; break; } return(retval); } int SDL_CDEject(SDL_CD *cdrom) { /* Check if the CD-ROM subsystem has been initialized */ if ( ! CheckInit(1, &cdrom) ) { return(CD_ERROR); } return(SDL_CDcaps.Eject(cdrom)); } void SDL_CDClose(SDL_CD *cdrom) { /* Check if the CD-ROM subsystem has been initialized */ if ( ! CheckInit(1, &cdrom) ) { return; } SDL_CDcaps.Close(cdrom); free(cdrom); default_cdrom = NULL; } void SDL_CDROMQuit(void) { SDL_SYS_CDQuit(); SDL_cdinitted = 0; }