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   { vmoan_syserr(0, fmt, ap); }
  10
  11 void vmoan_syserr(int err, const char *fmt, va_list ap)
  12 {
  13   fprintf(stderr, "%s: ", prog);
  14   vfprintf(stderr, fmt, ap);
  15   if (err) fprintf(stderr, ": %s", strerror(errno));
  16   fputc('\n', stderr);
  17 }
  18
  19 void moan(const char *fmt, ...)
  20   { va_list ap; va_start(ap, fmt); vmoan(fmt, ap); va_end(ap); }
  21
  22 void moan_syserr(int err, const char *fmt, ...)
  23   { va_list ap; va_start(ap, fmt); vmoan_syserr(err, fmt, ap); va_end(ap); }
  24
  25 void bail(const char *fmt, ...)
  26   { va_list ap; va_start(ap, fmt); vmoan(fmt, ap); va_end(ap); exit(2); }
  27
  28 void bail_syserr(int err, const char *fmt, ...)
  29 {
  30   va_list ap;
  31
  32   va_start(ap, fmt); vmoan_syserr(err, fmt, ap); va_end(ap);
  33   exit(2);
  34 }
  35
  36 void sit(double t)
  37 {
  38   struct timeval tv;
  39   double whole = floor(t);
  40
  41   if (t) {
  42     tv.tv_sec = whole; tv.tv_usec = floor((t - whole)*1.0e6) + 1;
  43     if (select(0, 0, 0, 0, &tv) < 0) bail_syserr(errno, "failed to sleep");
  44   }
  45 }
  46
  47 void carefully_write(int fd, const void *buf, size_t sz)
  48 {
  49   const unsigned char *p = buf;
  50   ssize_t n;
  51
  52   if (fd < 0) return;
  53   while (sz) {
  54     n = write(fd, p, sz);
  55     if (n < 0) {
  56       if (errno == EINTR) continue;
  57       bail_syserr(errno, "failed to write to output file");
  58     }
  59     if (!n) bail("unexpected short write to output file");
  60     p += n; sz -= n;
  61   }
  62 }
  63
  64 void open_file_on_demand(const char *file, FILE **fp_inout, const char *what)
  65 {
  66   FILE *fp;
  67
  68   if (!*fp_inout) {
  69     fp = fopen(file, "w");
  70     if (!fp) bail_syserr(errno, "failed to open %s file `%s'", what, file);
  71     fprintf(fp, "## %s\n\n", what);
  72     *fp_inout = fp;
  73   }
  74 }
  75
  76 void check_write(FILE *fp, const char *what)
  77 {
  78   fflush(fp);
  79   if (ferror(fp)) bail_syserr(errno, "error writing %s file", what);
  80 }
  81
  82 void carefully_fclose(FILE *fp, const char *what)
  83 {
  84   if (fp && (ferror(fp) || fclose(fp)))
  85     bail_syserr(errno, "error writing %s file", what);
  86 }
  87
  88 void store_filename(char *buf, ident id)
  89 {
  90   switch (id_kind(id)) {
  91     case RAW:
  92       sprintf(buf, "#<raw device>");
  93       break;
  94     case IFO:
  95       if (!id_title(id)) sprintf(buf, "/VIDEO_TS/VIDEO_TS.IFO");
  96       else sprintf(buf, "/VIDEO_TS/VTS_%02u_0.IFO", id_title(id));
  97       break;
  98     case BUP:
  99       if (!id_title(id)) sprintf(buf, "/VIDEO_TS/VIDEO_TS.BUP");
 100       else sprintf(buf, "/VIDEO_TS/VTS_%02u_0.BUP", id_title(id));
 101       break;
 102     case VOB:
 103       if (!id_title(id)) sprintf(buf, "/VIDEO_TS/VIDEO_TS.VOB");
 104       else
 105         sprintf(buf, "/VIDEO_TS/VTS_%02u_%u.VOB", id_title(id), id_part(id));
 106       break;
 107     default:
 108       abort();
 109   }
 110 }
 111
 112 static char *copy_string(char *p, const char *q)
 113 {
 114   while (*q) *p++ = *q++;
 115   *p = 0; return (p);
 116 }
 117
 118 static char *copy_hex(char *p, const unsigned char *q, size_t sz)
 119 {
 120   while (sz) {
 121     sprintf(p, "%02x", *q);
 122     p += 2; q++; sz--;
 123   }
 124   return (p);
 125 }
 126
 127 int dvd_id(char *p, dvd_reader_t *dvd, unsigned f, const char *file)
 128 {
 129   char volid[33];
 130   unsigned char volsetid[16], discid[16];
 131   int rc;
 132   size_t n;
 133
 134   rc = DVDUDFVolumeInfo(dvd,
 135                         volid, sizeof(volid),
 136                         volsetid, sizeof(volsetid));
 137   if (!rc) {
 138     p = copy_string(p, volid);
 139     *p++ = '-';
 140     for (n = sizeof(volsetid); n && !volsetid[n - 1]; n--);
 141     p = copy_hex(p, volsetid, n);
 142   } else if (f&DIF_MUSTVOLINF) {
 143     if (file) moan("failed to read volume info for `%s'", file);
 144     else moan("failed to read volume info");
 145     return (-1);
 146   } else
 147     p = copy_string(p, "<error reading volume info>");
 148
 149   *p++ = ':';
 150   rc = DVDDiscID(dvd, discid);
 151   if (!rc)
 152     p = copy_hex(p, discid, sizeof(discid));
 153   else if (f&DIF_MUSTIFOHASH) {
 154     if (file) moan("failed to determine disc id of `%s'", file);
 155     else moan("failed to determine disc id");
 156     return (-1);
 157   } else
 158     p = copy_string(p, "<error reading disc-id>");
 159
 160   return (0);
 161 }
 162
 163 struct progress_state progress = PROGRESS_STATE_INIT;
 164 static struct banner_progress_item banner_progress;
 165
 166 static void render_banner_progress(struct progress_item *item,
 167                             struct progress_render_state *render)
 168 {
 169   struct banner_progress_item *bi = (struct banner_progress_item *)item;
 170
 171   progress_putleft(render, " %s", bi->msg);
 172   progress_shownotice(render, 4, 7);
 173 }
 174
 175 void show_banner(const char *msg)
 176 {
 177   banner_progress._base.render = render_banner_progress;
 178   progress_additem(&progress, &banner_progress._base);
 179   banner_progress.msg = msg;
 180   progress_update(&progress);
 181 }
 182
 183 void hide_banner(void)
 184 {
 185   if (!progress_removeitem(&progress, &banner_progress._base))
 186     progress_update(&progress);
 187 }
 188
 189 #ifdef notdef
 190 static void logfn(void *p, dvd_logger_level_t lev,
 191                   const char *fmt, va_list ap)
 192 {
 193   switch (lev) {
 194     case DVD_LOGGER_LEVEL_ERROR:
 195       fprintf("%s (libdvdread error): ", prog);
 196       break;
 197     case DVD_LOGGER_LEVEL_WARN:
 198       fprintf("%s (libdvdread warning): ", prog);
 199       break;
 200     default:
 201       return;
 202   }
 203   vfprintf(stderr, fmt, ap);
 204   fputc('\n', stderr);
 205 }
 206 static const dvd_logger_cb logger = { logfn };
 207 #endif
 208
 209 void open_dvd(const char *device, int *fd_out, dvd_reader_t **dvd_out)
 210 {
 211   int fd;
 212   dvd_reader_t *dvd;
 213   int bannerp = 0;
 214
 215   for (;;) {
 216     fd = open(device, O_RDONLY);
 217     if (fd >= 0 || errno != ENOMEDIUM) break;
 218     if (!bannerp) {
 219       show_banner("Waiting for disc to be inserted...");
 220       bannerp = 1;
 221     }
 222     sit(0.2);
 223   }
 224   if (bannerp) hide_banner();
 225   if (fd < 0) bail_syserr(errno, "failed to open device `%s'", device);
 226   if (dvd_out) {
 227 #ifdef notdef
 228     dvd = DVDOpen2(0, &logger, device);
 229 #else
 230     dvd = DVDOpen(device);
 231 #endif
 232     if (!dvd) bail("failed to open DVD on `%s'", device);
 233     *dvd_out = dvd;
 234   }
 235   if (fd_out) *fd_out = fd;
 236   else close(fd);
 237 }