view test/testcdrom.c @ 2318:0c653886cce7

HandleEvent() returns done each time it is called. If done was set to 0 the program should quit, but because done is not checked until *all* events are handled a following event can reset done to 1 and prevent the program from terminating when told to. I fixed the while loop that handles events to check for the state of done after handling each event. That could leave some events unhandled when the program exits, but it ensures that the program will exit.
author Bob Pendleton <bob@pendleton.com>
date Wed, 20 Feb 2008 23:27:33 +0000
parents c121d94672cb
children
line wrap: on
line source


/* Test the SDL CD-ROM audio functions */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>

#include "SDL.h"

/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
static void
quit(int rc)
{
    SDL_Quit();
    exit(rc);
}

static void
PrintStatus(int driveindex, SDL_CD * cdrom)
{
    CDstatus status;
    char *status_str;

    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 %d status: %s\n", driveindex, 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);
    }
}

static void
ListTracks(SDL_CD * cdrom)
{
    int i;
    int m, s, f;
    char *trtype;

    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;
        switch (cdrom->track[i].type) {
        case SDL_AUDIO_TRACK:
            trtype = "audio";
            break;
        case SDL_DATA_TRACK:
            trtype = "data";
            break;
        default:
            trtype = "unknown";
            break;
        }
        printf("\tTrack (index %d) %d: %d:%2.2d / %d [%s track]\n", i,
               cdrom->track[i].id, m, s, cdrom->track[i].length, trtype);
    }
}

static void
PrintUsage(char *argv0)
{
    fprintf(stderr, "Usage: %s [drive#] [command] [command] ...\n", argv0);
    fprintf(stderr, "Where 'command' is one of:\n");
    fprintf(stderr, "	-status\n");
    fprintf(stderr, "	-list\n");
    fprintf(stderr,
            "	-play [first_track] [first_frame] [num_tracks] [num_frames]\n");
    fprintf(stderr, "	-pause\n");
    fprintf(stderr, "	-resume\n");
    fprintf(stderr, "	-stop\n");
    fprintf(stderr, "	-eject\n");
    fprintf(stderr, "	-sleep <milliseconds>\n");
}

int
main(int argc, char *argv[])
{
    int drive;
    int i;
    SDL_CD *cdrom;

    /* Initialize SDL first */
    if (SDL_Init(SDL_INIT_CDROM) < 0) {
        fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
        return (1);
    }

    /* Find out how many CD-ROM drives are connected to the system */
    if (SDL_CDNumDrives() == 0) {
        printf("No CD-ROM devices detected\n");
        quit(0);
    }
    printf("Drives available: %d\n", SDL_CDNumDrives());
    for (i = 0; i < SDL_CDNumDrives(); ++i) {
        printf("Drive %d:  \"%s\"\n", i, SDL_CDName(i));
    }

    /* Open the CD-ROM */
    drive = 0;
    i = 1;
    if (argv[i] && isdigit(argv[i][0])) {
        drive = atoi(argv[i++]);
    }
    cdrom = SDL_CDOpen(drive);
    if (cdrom == NULL) {
        fprintf(stderr, "Couldn't open drive %d: %s\n", drive,
                SDL_GetError());
        quit(2);
    }
#ifdef TEST_NULLCD
    cdrom = NULL;
#endif

    /* Find out which function to perform */
    for (; argv[i]; ++i) {
        if (strcmp(argv[i], "-status") == 0) {
            /* PrintStatus(drive, cdrom); */
        } else if (strcmp(argv[i], "-list") == 0) {
            ListTracks(cdrom);
        } else if (strcmp(argv[i], "-play") == 0) {
            int strack, sframe;
            int ntrack, nframe;

            strack = 0;
            if (argv[i + 1] && isdigit(argv[i + 1][0])) {
                strack = atoi(argv[++i]);
            }
            sframe = 0;
            if (argv[i + 1] && isdigit(argv[i + 1][0])) {
                sframe = atoi(argv[++i]);
            }
            ntrack = 0;
            if (argv[i + 1] && isdigit(argv[i + 1][0])) {
                ntrack = atoi(argv[++i]);
            }
            nframe = 0;
            if (argv[i + 1] && isdigit(argv[i + 1][0])) {
                nframe = atoi(argv[++i]);
            }
            if (CD_INDRIVE(SDL_CDStatus(cdrom))) {
                if (SDL_CDPlayTracks(cdrom, strack, sframe,
                                     ntrack, nframe) < 0) {
                    fprintf(stderr,
                            "Couldn't play tracks %d/%d for %d/%d: %s\n",
                            strack, sframe, ntrack, nframe, SDL_GetError());
                }
            } else {
                fprintf(stderr, "No CD in drive!\n");
            }
        } else if (strcmp(argv[i], "-pause") == 0) {
            if (SDL_CDPause(cdrom) < 0) {
                fprintf(stderr, "Couldn't pause CD: %s\n", SDL_GetError());
            }
        } else if (strcmp(argv[i], "-resume") == 0) {
            if (SDL_CDResume(cdrom) < 0) {
                fprintf(stderr, "Couldn't resume CD: %s\n", SDL_GetError());
            }
        } else if (strcmp(argv[i], "-stop") == 0) {
            if (SDL_CDStop(cdrom) < 0) {
                fprintf(stderr, "Couldn't eject CD: %s\n", SDL_GetError());
            }
        } else if (strcmp(argv[i], "-eject") == 0) {
            if (SDL_CDEject(cdrom) < 0) {
                fprintf(stderr, "Couldn't eject CD: %s\n", SDL_GetError());
            }
        } else if ((strcmp(argv[i], "-sleep") == 0) &&
                   (argv[i + 1] && isdigit(argv[i + 1][0]))) {
            SDL_Delay(atoi(argv[++i]));
            printf("Delayed %d milliseconds\n", atoi(argv[i]));
        } else {
            PrintUsage(argv[0]);
            SDL_CDClose(cdrom);
            quit(1);
        }
    }
    PrintStatus(drive, cdrom);
    SDL_CDClose(cdrom);
    SDL_Quit();

    return (0);
}