mdw@git.distorted.org.uk Git - dvdrip/blob - lib.c

   1 #include "lib.h"
   2
   3 const char *prog = "<unset>";
   4
   5 void set_prog(const char *p)
   6   { const char *q = strrchr(p, '/'); prog = q ? q + 1 : p; }
   7
   8 void vmoan(const char *fmt, va_list ap)
   9   { fprintf(stderr, "%s: ", prog); vfprintf(stderr, fmt, ap); }
  10
  11 __attribute__((format(printf, 1, 2)))
  12 void moan(const char *fmt, ...)
  13 {
  14   va_list ap;
  15
  16   va_start(ap, fmt); vmoan(fmt, ap); va_end(ap);
  17   fputc('\n', stderr);
  18 }
  19
  20 __attribute__((noreturn, format(printf, 1, 2)))
  21 void bail(const char *fmt, ...)
  22 {
  23   va_list ap;
  24
  25   va_start(ap, fmt); vmoan(fmt, ap); va_end(ap);
  26   fputc('\n', stderr);
  27   exit(2);
  28 }
  29
  30 __attribute__((noreturn, format(printf, 2, 3)))
  31 void bail_syserr(int err, const char *fmt, ...)
  32 {
  33   va_list ap;
  34
  35   va_start(ap, fmt); vmoan(fmt, ap); va_end(ap);
  36   if (err) fprintf(stderr, ": %s", strerror(errno));
  37   fputc('\n', stderr);
  38   exit(2);
  39 }
  40
  41 void sit(double t)
  42 {
  43   struct timeval tv;
  44   double whole = floor(t);
  45
  46   if (t) {
  47     tv.tv_sec = whole; tv.tv_usec = floor((t - whole)*1.0e6) + 1;
  48     if (select(0, 0, 0, 0, &tv) < 0) bail_syserr(errno, "failed to sleep");
  49   }
  50 }
  51
  52 void store_filename(char *buf, ident id)
  53 {
  54   switch (id_kind(id)) {
  55     case RAW:
  56       sprintf(buf, "#<raw device>");
  57       break;
  58     case IFO:
  59       if (!id_title(id)) sprintf(buf, "/VIDEO_TS/VIDEO_TS.IFO");
  60       else sprintf(buf, "/VIDEO_TS/VTS_%02u_0.IFO", id_title(id));
  61       break;
  62     case BUP:
  63       if (!id_title(id)) sprintf(buf, "/VIDEO_TS/VIDEO_TS.BUP");
  64       else sprintf(buf, "/VIDEO_TS/VTS_%02u_0.BUP", id_title(id));
  65       break;
  66     case VOB:
  67       if (!id_title(id)) sprintf(buf, "/VIDEO_TS/VIDEO_TS.VOB");
  68       else
  69         sprintf(buf, "/VIDEO_TS/VTS_%02u_%u.VOB", id_title(id), id_part(id));
  70       break;
  71     default:
  72       abort();
  73   }
  74 }
  75
  76 struct progress_state progress = PROGRESS_STATE_INIT;
  77 static struct banner_progress_item banner_progress;
  78
  79 static void render_banner_progress(struct progress_item *item,
  80                             struct progress_render_state *render)
  81 {
  82   struct banner_progress_item *bi = (struct banner_progress_item *)item;
  83
  84   progress_putleft(render, " %s", bi->msg);
  85   progress_shownotice(render, 4, 7);
  86 }
  87
  88 void show_banner(const char *msg)
  89 {
  90   banner_progress._base.render = render_banner_progress;
  91   progress_additem(&progress, &banner_progress._base);
  92   banner_progress.msg = msg;
  93   progress_update(&progress);
  94 }
  95
  96 void hide_banner(void)
  97 {
  98   if (!progress_removeitem(&progress, &banner_progress._base))
  99     progress_update(&progress);
 100 }
 101
 102 #ifdef notdef
 103 static void logfn(void *p, dvd_logger_level_t lev,
 104                   const char *fmt, va_list ap)
 105 {
 106   switch (lev) {
 107     case DVD_LOGGER_LEVEL_ERROR:
 108       fprintf("%s (libdvdread error): ", prog);
 109       break;
 110     case DVD_LOGGER_LEVEL_WARN:
 111       fprintf("%s (libdvdread warning): ", prog);
 112       break;
 113     default:
 114       return;
 115   }
 116   vfprintf(stderr, fmt, ap);
 117   fputc('\n', stderr);
 118 }
 119 static const dvd_logger_cb logger = { logfn };
 120 #endif
 121
 122 void open_dvd(const char *device, int *fd_out, dvd_reader_t **dvd_out)
 123 {
 124   int fd;
 125   dvd_reader_t *dvd;
 126   int bannerp = 0;
 127
 128   for (;;) {
 129     fd = open(device, O_RDONLY);
 130     if (fd >= 0 || errno != ENOMEDIUM) break;
 131     if (!bannerp) {
 132       show_banner("Waiting for disc to be inserted...");
 133       bannerp = 1;
 134     }
 135     sit(0.2);
 136   }
 137   if (bannerp) hide_banner();
 138   if (fd < 0) bail_syserr(errno, "failed to open device `%s'", device);
 139   if (dvd_out) {
 140 #ifdef notdef
 141     dvd = DVDOpen2(0, &logger, device);
 142 #else
 143     dvd = DVDOpen(device);
 144 #endif
 145     if (!dvd) bail("failed to open DVD on `%s'", device);
 146     *dvd_out = dvd;
 147   }
 148   if (fd_out) *fd_out = fd;
 149   else close(fd);
 150 }