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| ><H1 |
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| ><A |
| NAME="GUIDECDROMEXAMPLES" |
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| >CDROM Examples</H1 |
| ><P |
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| ><DIV |
| CLASS="SECT2" |
| ><H2 |
| CLASS="SECT2" |
| ><A |
| NAME="AEN393" |
| ></A |
| >Listing CD-ROM drives</H2 |
| ><P |
| ><PRE |
| CLASS="PROGRAMLISTING" |
| > #include "SDL.h" |
| |
| /* Initialize SDL first */ |
| if ( SDL_Init(SDL_INIT_CDROM) < 0 ) { |
| fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); |
| exit(1); |
| } |
| atexit(SDL_Quit); |
| |
| /* Find out how many CD-ROM drives are connected to the system */ |
| printf("Drives available: %d\n", SDL_CDNumDrives()); |
| for ( i=0; i<SDL_CDNumDrives(); ++i ) { |
| printf("Drive %d: \"%s\"\n", i, SDL_CDName(i)); |
| }</PRE |
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| NAME="AEN397" |
| ></A |
| >Opening the default drive</H2 |
| ><P |
| ><PRE |
| CLASS="PROGRAMLISTING" |
| > SDL_CD *cdrom; |
| CDstatus status; |
| char *status_str; |
| |
| cdrom = SDL_CDOpen(0); |
| if ( cdrom == NULL ) { |
| fprintf(stderr, "Couldn't open default CD-ROM drive: %s\n", |
| SDL_GetError()); |
| exit(2); |
| } |
| |
| status = SDL_CDStatus(cdrom); |
| switch (status) { |
| case CD_TRAYEMPTY: |
| status_str = "tray empty"; |
| break; |
| case CD_STOPPED: |
| status_str = "stopped"; |
| break; |
| case CD_PLAYING: |
| status_str = "playing"; |
| break; |
| case CD_PAUSED: |
| status_str = "paused"; |
| break; |
| case CD_ERROR: |
| status_str = "error state"; |
| break; |
| } |
| printf("Drive status: %s\n", status_str); |
| if ( status >= CD_PLAYING ) { |
| int m, s, f; |
| FRAMES_TO_MSF(cdrom->cur_frame, &m, &s, &f); |
| printf("Currently playing track %d, %d:%2.2d\n", |
| cdrom->track[cdrom->cur_track].id, m, s); |
| }</PRE |
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| ><A |
| NAME="AEN401" |
| ></A |
| >Listing the tracks on a CD</H2 |
| ><P |
| ><PRE |
| CLASS="PROGRAMLISTING" |
| > SDL_CD *cdrom; /* Assuming this has already been set.. */ |
| int i; |
| int m, s, f; |
| |
| SDL_CDStatus(cdrom); |
| printf("Drive tracks: %d\n", cdrom->numtracks); |
| for ( i=0; i<cdrom->numtracks; ++i ) { |
| FRAMES_TO_MSF(cdrom->track[i].length, &m, &s, &f); |
| if ( f > 0 ) |
| ++s; |
| printf("\tTrack (index %d) %d: %d:%2.2d\n", i, |
| cdrom->track[i].id, m, s); |
| }</PRE |
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| ><A |
| NAME="AEN405" |
| ></A |
| >Play an entire CD</H2 |
| ><P |
| ><PRE |
| CLASS="PROGRAMLISTING" |
| > SDL_CD *cdrom; /* Assuming this has already been set.. */ |
| |
| // Play entire CD: |
| if ( CD_INDRIVE(SDL_CDStatus(cdrom)) ) |
| SDL_CDPlayTracks(cdrom, 0, 0, 0, 0); |
| |
| // Play last track: |
| if ( CD_INDRIVE(SDL_CDStatus(cdrom)) ) { |
| SDL_CDPlayTracks(cdrom, cdrom->numtracks-1, 0, 0, 0); |
| } |
| |
| // Play first and second track and 10 seconds of third track: |
| if ( CD_INDRIVE(SDL_CDStatus(cdrom)) ) |
| SDL_CDPlayTracks(cdrom, 0, 0, 2, CD_FPS * 10);</PRE |
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