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 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) || defined(__NetBSD__) || defined(__OpenBSD__)
  41 #include "vcd_read_fbsd.h"
  42 #elif defined(__APPLE__)
  43 #include "vcd_read_darwin.h"
  44 #elif defined(__MINGW32__) || defined(__CYGWIN__)
  45 #include "vcd_read_win32.h"
  46 #elif defined(__OS2__)
  47 #include "vcd_read_os2.h"
  48 #else
  49 #include "vcd_read.h"
  50 #endif
  51
  52 #include "libmpdemux/demuxer.h"
  53
  54 extern char *cdrom_device;
  55
  56 static struct stream_priv_s {
  57   int track;
  58   char* device;
  59 } stream_priv_dflts = {
  60   1,
  61   NULL
  62 };
  63
  64 #define ST_OFF(f) M_ST_OFF(struct stream_priv_s,f)
  65 /// URL definition
  66 static const m_option_t stream_opts_fields[] = {
  67   { "track", ST_OFF(track), CONF_TYPE_INT, M_OPT_MIN, 1, 0, NULL },
  68   { "device", ST_OFF(device), CONF_TYPE_STRING, 0, 0 ,0, NULL},
  69   /// For url parsing
  70   { "hostname", ST_OFF(track), CONF_TYPE_INT, M_OPT_MIN, 1, 0, NULL },
  71   { "filename", ST_OFF(device), CONF_TYPE_STRING, 0, 0 ,0, NULL},
  72   { NULL, NULL, 0, 0, 0, 0,  NULL }
  73 };
  74 static const struct m_struct_st stream_opts = {
  75   "vcd",
  76   sizeof(struct stream_priv_s),
  77   &stream_priv_dflts,
  78   stream_opts_fields
  79 };
  80
  81 static int fill_buffer(stream_t *s, char* buffer, int max_len){
  82   if(s->pos > s->end_pos) /// don't past end of current track
  83     return 0;
  84   return vcd_read(s->priv,buffer);
  85 }
  86
  87 static int seek(stream_t *s,off_t newpos) {
  88   s->pos = newpos;
  89   vcd_set_msf(s->priv,s->pos/VCD_SECTOR_DATA);
  90   return 1;
  91 }
  92
  93 static int control(stream_t *stream, int cmd, void *arg) {
  94   struct stream_priv_s *p = stream->priv;
  95   switch(cmd) {
  96     case STREAM_CTRL_GET_NUM_CHAPTERS:
  97     {
  98       mp_vcd_priv_t *vcd = vcd_read_toc(stream->fd);
  99       if (!vcd)
 100         break;
 101       *(unsigned int *)arg = vcd_end_track(vcd);
 102       return STREAM_OK;
 103     }
 104     case STREAM_CTRL_SEEK_TO_CHAPTER:
 105     {
 106       int r;
 107       unsigned int track = *(unsigned int *)arg + 1;
 108       mp_vcd_priv_t *vcd = vcd_read_toc(stream->fd);
 109       if (!vcd)
 110         break;
 111       r = vcd_seek_to_track(vcd, track);
 112       if (r >= 0) {
 113         p->track = track;
 114         return STREAM_OK;
 115       }
 116       break;
 117     }
 118     case STREAM_CTRL_GET_CURRENT_CHAPTER:
 119     {
 120       *(unsigned int *)arg = p->track - 1;
 121       return STREAM_OK;
 122     }
 123   }
 124   return STREAM_UNSUPPORTED;
 125 }
 126
 127 static void close_s(stream_t *stream) {
 128   free(stream->priv);
 129 }
 130
 131 static int open_s(stream_t *stream,int mode, void* opts, int* file_format) {
 132   struct stream_priv_s* p = opts;
 133   int ret,ret2,f,sect,tmp;
 134   mp_vcd_priv_t* vcd;
 135 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 136   int bsize = VCD_SECTOR_SIZE;
 137 #endif
 138 #if defined(__MINGW32__) || defined(__CYGWIN__)
 139   HANDLE hd;
 140   char device[] = "\\\\.\\?:";
 141 #endif
 142 #if defined(__OS2__)
 143   char device[] = "X:";
 144   HFILE hcd;
 145   ULONG ulAction;
 146   ULONG rc;
 147 #endif
 148
 149   if(mode != STREAM_READ
 150 #if defined(__MINGW32__) || defined(__CYGWIN__)
 151       || GetVersion() > 0x80000000 // Win9x
 152 #endif
 153       ) {
 154     m_struct_free(&stream_opts,opts);
 155     return STREAM_UNSUPPORTED;
 156   }
 157
 158   if (!p->device) {
 159     if(cdrom_device)
 160       p->device = strdup(cdrom_device);
 161     else
 162       p->device = strdup(DEFAULT_CDROM_DEVICE);
 163   }
 164
 165 #if defined(__MINGW32__) || defined(__CYGWIN__)
 166   device[4] = p->device[0];
 167   /* open() can't be used for devices so do it the complicated way */
 168   hd = CreateFile(device, GENERIC_READ, FILE_SHARE_READ, NULL,
 169           OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL);
 170   f = _open_osfhandle((long)hd, _O_RDONLY);
 171 #elif defined(__OS2__)
 172   device[0] = p->device[0];
 173   rc = DosOpen(device, &hcd, &ulAction, 0, FILE_NORMAL,
 174                OPEN_ACTION_OPEN_IF_EXISTS | OPEN_ACTION_FAIL_IF_NEW,
 175                OPEN_ACCESS_READONLY | OPEN_SHARE_DENYNONE | OPEN_FLAGS_DASD,
 176                NULL);
 177   f = rc ? -1 : hcd;
 178 #else
 179   f=open(p->device,O_RDONLY);
 180 #endif
 181   if(f<0){
 182     mp_tmsg(MSGT_OPEN,MSGL_ERR,"CD-ROM Device '%s' not found.\n",p->device);
 183     m_struct_free(&stream_opts,opts);
 184     return STREAM_ERROR;
 185   }
 186
 187   vcd = vcd_read_toc(f);
 188   if(!vcd) {
 189     mp_msg(MSGT_OPEN,MSGL_ERR,"Failed to get cd toc\n");
 190     close(f);
 191     m_struct_free(&stream_opts,opts);
 192     return STREAM_ERROR;
 193   }
 194   ret2=vcd_get_track_end(vcd,p->track);
 195   if(ret2<0){
 196       mp_msg(MSGT_OPEN, MSGL_ERR, "%s (get)\n",
 197              mp_gtext("Error selecting VCD track."));
 198     close(f);
 199     free(vcd);
 200     m_struct_free(&stream_opts,opts);
 201     return STREAM_ERROR;
 202   }
 203   ret=vcd_seek_to_track(vcd,p->track);
 204   if(ret<0){
 205       mp_msg(MSGT_OPEN, MSGL_ERR, "%s (seek)\n",
 206              mp_gtext("Error selecting VCD track."));
 207     close(f);
 208     free(vcd);
 209     m_struct_free(&stream_opts,opts);
 210     return STREAM_ERROR;
 211   }
 212   /* search forward up to at most 3 seconds to skip leading margin */
 213   sect = ret / VCD_SECTOR_DATA;
 214   for (tmp = sect; tmp < sect + 3 * 75; tmp++) {
 215     char mem[VCD_SECTOR_DATA];
 216     //since MPEG packs are block-aligned we stop discarding sectors if they are non-null
 217     if (vcd_read(vcd, mem) != VCD_SECTOR_DATA || mem[2] || mem[3])
 218       break;
 219   }
 220   mp_msg(MSGT_OPEN, MSGL_DBG2, "%d leading sectors skipped\n", tmp - sect);
 221   vcd_set_msf(vcd, tmp);
 222   ret = tmp * VCD_SECTOR_DATA;
 223
 224   mp_msg(MSGT_OPEN,MSGL_V,"VCD start byte position: 0x%X  end: 0x%X\n",ret,ret2);
 225
 226 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 227   if (ioctl (f, CDRIOCSETBLOCKSIZE, &bsize) == -1) {
 228     mp_msg(MSGT_OPEN,MSGL_WARN,"Error in CDRIOCSETBLOCKSIZE");
 229   }
 230 #endif
 231
 232   stream->fd = f;
 233   stream->type = STREAMTYPE_VCD;
 234   stream->sector_size = VCD_SECTOR_DATA;
 235   stream->start_pos=ret;
 236   stream->end_pos=ret2;
 237   stream->priv = vcd;
 238
 239   stream->fill_buffer = fill_buffer;
 240   stream->seek = seek;
 241   stream->control = control;
 242   stream->close = close_s;
 243   *file_format = DEMUXER_TYPE_MPEG_PS;
 244
 245   m_struct_free(&stream_opts,opts);
 246   return STREAM_OK;
 247 }
 248
 249 const stream_info_t stream_info_vcd = {
 250   "Video CD",
 251   "vcd",
 252   "Albeu",
 253   "based on the code from ???",
 254   open_s,
 255   { "vcd", NULL },
 256   &stream_opts,
 257   1 // Urls are an option string
 258 };