stream/stream_vcd.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include "config.h"
  20
  21 #if defined(__MINGW32__) || defined(__CYGWIN__)
  22 #include <windows.h>
  23 #endif
  24
  25 #include "osdep/osdep.h"
  26
  27 #include "mp_msg.h"
  28 #include "stream.h"
  29 #include "m_option.h"
  30 #include "m_struct.h"
  31
  32 #include <fcntl.h>
  33 #include <stdlib.h>
  34 #include <unistd.h>
  35 #if !defined(__MINGW32__) && !defined(__CYGWIN__)
  36 #include <sys/ioctl.h>
  37 #endif
  38 #include <errno.h>
  39
  40 #include "talloc.h"
  41
  42 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) || defined(__NetBSD__) || defined(__OpenBSD__)
  43 #include "vcd_read_fbsd.h"
  44 #elif defined(__APPLE__)
  45 #include "vcd_read_darwin.h"
  46 #elif defined(__MINGW32__) || defined(__CYGWIN__)
  47 #include "vcd_read_win32.h"
  48 #elif defined(__OS2__)
  49 #include "vcd_read_os2.h"
  50 #else
  51 #include "vcd_read.h"
  52 #endif
  53
  54 #include "libmpdemux/demuxer.h"
  55
  56 extern char *cdrom_device;
  57
  58 static struct stream_priv_s {
  59   int track;
  60   char* device;
  61 } stream_priv_dflts = {
  62   1,
  63   NULL
  64 };
  65
  66 #define ST_OFF(f) M_ST_OFF(struct stream_priv_s,f)
  67 /// URL definition
  68 static const m_option_t stream_opts_fields[] = {
  69   { "track", ST_OFF(track), CONF_TYPE_INT, M_OPT_MIN, 1, 0, NULL },
  70   { "device", ST_OFF(device), CONF_TYPE_STRING, 0, 0 ,0, NULL},
  71   /// For url parsing
  72   { "hostname", ST_OFF(track), CONF_TYPE_INT, M_OPT_MIN, 1, 0, NULL },
  73   { "filename", ST_OFF(device), CONF_TYPE_STRING, 0, 0 ,0, NULL},
  74   { NULL, NULL, 0, 0, 0, 0,  NULL }
  75 };
  76 static const struct m_struct_st stream_opts = {
  77   "vcd",
  78   sizeof(struct stream_priv_s),
  79   &stream_priv_dflts,
  80   stream_opts_fields
  81 };
  82
  83 static int fill_buffer(stream_t *s, char* buffer, int max_len){
  84   if(s->pos > s->end_pos) /// don't past end of current track
  85     return 0;
  86   return vcd_read(s->priv,buffer);
  87 }
  88
  89 static int seek(stream_t *s,off_t newpos) {
  90   s->pos = newpos;
  91   vcd_set_msf(s->priv,s->pos/VCD_SECTOR_DATA);
  92   return 1;
  93 }
  94
  95 static int control(stream_t *stream, int cmd, void *arg) {
  96   struct stream_priv_s *p = stream->priv;
  97   switch(cmd) {
  98     case STREAM_CTRL_GET_NUM_CHAPTERS:
  99     {
 100       mp_vcd_priv_t *vcd = vcd_read_toc(stream->fd);
 101       if (!vcd)
 102         break;
 103       *(unsigned int *)arg = vcd_end_track(vcd);
 104       return STREAM_OK;
 105     }
 106     case STREAM_CTRL_SEEK_TO_CHAPTER:
 107     {
 108       int r;
 109       unsigned int track = *(unsigned int *)arg + 1;
 110       mp_vcd_priv_t *vcd = vcd_read_toc(stream->fd);
 111       if (!vcd)
 112         break;
 113       r = vcd_seek_to_track(vcd, track);
 114       if (r >= 0) {
 115         p->track = track;
 116         return STREAM_OK;
 117       }
 118       break;
 119     }
 120     case STREAM_CTRL_GET_CURRENT_CHAPTER:
 121     {
 122       *(unsigned int *)arg = p->track - 1;
 123       return STREAM_OK;
 124     }
 125   }
 126   return STREAM_UNSUPPORTED;
 127 }
 128
 129 static void close_s(stream_t *stream) {
 130   free(stream->priv);
 131 }
 132
 133 static int open_s(stream_t *stream,int mode, void* opts, int* file_format) {
 134   struct stream_priv_s* p = opts;
 135   int ret,ret2,f,sect,tmp;
 136   mp_vcd_priv_t* vcd;
 137 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 138   int bsize = VCD_SECTOR_SIZE;
 139 #endif
 140 #if defined(__MINGW32__) || defined(__CYGWIN__)
 141   HANDLE hd;
 142   char device[] = "\\\\.\\?:";
 143 #endif
 144 #if defined(__OS2__)
 145   char device[] = "X:";
 146   HFILE hcd;
 147   ULONG ulAction;
 148   ULONG rc;
 149 #endif
 150
 151   if(mode != STREAM_READ
 152 #if defined(__MINGW32__) || defined(__CYGWIN__)
 153       || GetVersion() > 0x80000000 // Win9x
 154 #endif
 155       ) {
 156     m_struct_free(&stream_opts,opts);
 157     return STREAM_UNSUPPORTED;
 158   }
 159
 160   if (!p->device) {
 161     if(cdrom_device)
 162       p->device = talloc_strdup(NULL, cdrom_device);
 163     else
 164       p->device = talloc_strdup(NULL, DEFAULT_CDROM_DEVICE);
 165   }
 166
 167 #if defined(__MINGW32__) || defined(__CYGWIN__)
 168   device[4] = p->device[0];
 169   /* open() can't be used for devices so do it the complicated way */
 170   hd = CreateFile(device, GENERIC_READ, FILE_SHARE_READ, NULL,
 171           OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL);
 172   f = _open_osfhandle((long)hd, _O_RDONLY);
 173 #elif defined(__OS2__)
 174   device[0] = p->device[0];
 175   rc = DosOpen(device, &hcd, &ulAction, 0, FILE_NORMAL,
 176                OPEN_ACTION_OPEN_IF_EXISTS | OPEN_ACTION_FAIL_IF_NEW,
 177                OPEN_ACCESS_READONLY | OPEN_SHARE_DENYNONE | OPEN_FLAGS_DASD,
 178                NULL);
 179   f = rc ? -1 : hcd;
 180 #else
 181   f=open(p->device,O_RDONLY);
 182 #endif
 183   if(f<0){
 184     mp_tmsg(MSGT_OPEN,MSGL_ERR,"CD-ROM Device '%s' not found.\n",p->device);
 185     m_struct_free(&stream_opts,opts);
 186     return STREAM_ERROR;
 187   }
 188
 189   vcd = vcd_read_toc(f);
 190   if(!vcd) {
 191     mp_msg(MSGT_OPEN,MSGL_ERR,"Failed to get cd toc\n");
 192     close(f);
 193     m_struct_free(&stream_opts,opts);
 194     return STREAM_ERROR;
 195   }
 196   ret2=vcd_get_track_end(vcd,p->track);
 197   if(ret2<0){
 198       mp_msg(MSGT_OPEN, MSGL_ERR, "%s (get)\n",
 199              mp_gtext("Error selecting VCD track."));
 200     close(f);
 201     free(vcd);
 202     m_struct_free(&stream_opts,opts);
 203     return STREAM_ERROR;
 204   }
 205   ret=vcd_seek_to_track(vcd,p->track);
 206   if(ret<0){
 207       mp_msg(MSGT_OPEN, MSGL_ERR, "%s (seek)\n",
 208              mp_gtext("Error selecting VCD track."));
 209     close(f);
 210     free(vcd);
 211     m_struct_free(&stream_opts,opts);
 212     return STREAM_ERROR;
 213   }
 214   /* search forward up to at most 3 seconds to skip leading margin */
 215   sect = ret / VCD_SECTOR_DATA;
 216   for (tmp = sect; tmp < sect + 3 * 75; tmp++) {
 217     char mem[VCD_SECTOR_DATA];
 218     //since MPEG packs are block-aligned we stop discarding sectors if they are non-null
 219     if (vcd_read(vcd, mem) != VCD_SECTOR_DATA || mem[2] || mem[3])
 220       break;
 221   }
 222   mp_msg(MSGT_OPEN, MSGL_DBG2, "%d leading sectors skipped\n", tmp - sect);
 223   vcd_set_msf(vcd, tmp);
 224   ret = tmp * VCD_SECTOR_DATA;
 225
 226   mp_msg(MSGT_OPEN,MSGL_V,"VCD start byte position: 0x%X  end: 0x%X\n",ret,ret2);
 227
 228 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 229   if (ioctl (f, CDRIOCSETBLOCKSIZE, &bsize) == -1) {
 230     mp_msg(MSGT_OPEN,MSGL_WARN,"Error in CDRIOCSETBLOCKSIZE");
 231   }
 232 #endif
 233
 234   stream->fd = f;
 235   stream->type = STREAMTYPE_VCD;
 236   stream->sector_size = VCD_SECTOR_DATA;
 237   stream->start_pos=ret;
 238   stream->end_pos=ret2;
 239   stream->priv = vcd;
 240
 241   stream->fill_buffer = fill_buffer;
 242   stream->seek = seek;
 243   stream->control = control;
 244   stream->close = close_s;
 245   *file_format = DEMUXER_TYPE_MPEG_PS;
 246
 247   m_struct_free(&stream_opts,opts);
 248   return STREAM_OK;
 249 }
 250
 251 const stream_info_t stream_info_vcd = {
 252   "Video CD",
 253   "vcd",
 254   "Albeu",
 255   "based on the code from ???",
 256   open_s,
 257   { "vcd", NULL },
 258   &stream_opts,
 259   1 // Urls are an option string
 260 };