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 void close_s(stream_t *stream) {
  94   free(stream->priv);
  95 }
  96
  97 static int open_s(stream_t *stream,int mode, void* opts, int* file_format) {
  98   struct stream_priv_s* p = opts;
  99   int ret,ret2,f,sect,tmp;
 100   mp_vcd_priv_t* vcd;
 101 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 102   int bsize = VCD_SECTOR_SIZE;
 103 #endif
 104 #if defined(__MINGW32__) || defined(__CYGWIN__)
 105   HANDLE hd;
 106   char device[] = "\\\\.\\?:";
 107 #endif
 108 #if defined(__OS2__)
 109   char device[] = "X:";
 110   HFILE hcd;
 111   ULONG ulAction;
 112   ULONG rc;
 113 #endif
 114
 115   if(mode != STREAM_READ
 116 #if defined(__MINGW32__) || defined(__CYGWIN__)
 117       || GetVersion() > 0x80000000 // Win9x
 118 #endif
 119       ) {
 120     m_struct_free(&stream_opts,opts);
 121     return STREAM_UNSUPPORTED;
 122   }
 123
 124   if (!p->device) {
 125     if(cdrom_device)
 126       p->device = strdup(cdrom_device);
 127     else
 128       p->device = strdup(DEFAULT_CDROM_DEVICE);
 129   }
 130
 131 #if defined(__MINGW32__) || defined(__CYGWIN__)
 132   device[4] = p->device[0];
 133   /* open() can't be used for devices so do it the complicated way */
 134   hd = CreateFile(device, GENERIC_READ, FILE_SHARE_READ, NULL,
 135           OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL);
 136   f = _open_osfhandle((long)hd, _O_RDONLY);
 137 #elif defined(__OS2__)
 138   device[0] = p->device[0];
 139   rc = DosOpen(device, &hcd, &ulAction, 0, FILE_NORMAL,
 140                OPEN_ACTION_OPEN_IF_EXISTS | OPEN_ACTION_FAIL_IF_NEW,
 141                OPEN_ACCESS_READONLY | OPEN_SHARE_DENYNONE | OPEN_FLAGS_DASD,
 142                NULL);
 143   f = rc ? -1 : hcd;
 144 #else
 145   f=open(p->device,O_RDONLY);
 146 #endif
 147   if(f<0){
 148     mp_tmsg(MSGT_OPEN,MSGL_ERR,"CD-ROM Device '%s' not found.\n",p->device);
 149     m_struct_free(&stream_opts,opts);
 150     return STREAM_ERROR;
 151   }
 152
 153   vcd = vcd_read_toc(f);
 154   if(!vcd) {
 155     mp_msg(MSGT_OPEN,MSGL_ERR,"Failed to get cd toc\n");
 156     close(f);
 157     m_struct_free(&stream_opts,opts);
 158     return STREAM_ERROR;
 159   }
 160   ret2=vcd_get_track_end(vcd,p->track);
 161   if(ret2<0){
 162       mp_msg(MSGT_OPEN, MSGL_ERR, "%s (get)\n",
 163              mp_gtext("Error selecting VCD track."));
 164     close(f);
 165     free(vcd);
 166     m_struct_free(&stream_opts,opts);
 167     return STREAM_ERROR;
 168   }
 169   ret=vcd_seek_to_track(vcd,p->track);
 170   if(ret<0){
 171       mp_msg(MSGT_OPEN, MSGL_ERR, "%s (seek)\n",
 172              mp_gtext("Error selecting VCD track."));
 173     close(f);
 174     free(vcd);
 175     m_struct_free(&stream_opts,opts);
 176     return STREAM_ERROR;
 177   }
 178   /* search forward up to at most 3 seconds to skip leading margin */
 179   sect = ret / VCD_SECTOR_DATA;
 180   for (tmp = sect; tmp < sect + 3 * 75; tmp++) {
 181     char mem[VCD_SECTOR_DATA];
 182     //since MPEG packs are block-aligned we stop discarding sectors if they are non-null
 183     if (vcd_read(vcd, mem) != VCD_SECTOR_DATA || mem[2] || mem[3])
 184       break;
 185   }
 186   mp_msg(MSGT_OPEN, MSGL_DBG2, "%d leading sectors skipped\n", tmp - sect);
 187   vcd_set_msf(vcd, tmp);
 188   ret = tmp * VCD_SECTOR_DATA;
 189
 190   mp_msg(MSGT_OPEN,MSGL_V,"VCD start byte position: 0x%X  end: 0x%X\n",ret,ret2);
 191
 192 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 193   if (ioctl (f, CDRIOCSETBLOCKSIZE, &bsize) == -1) {
 194     mp_msg(MSGT_OPEN,MSGL_WARN,"Error in CDRIOCSETBLOCKSIZE");
 195   }
 196 #endif
 197
 198   stream->fd = f;
 199   stream->type = STREAMTYPE_VCD;
 200   stream->sector_size = VCD_SECTOR_DATA;
 201   stream->start_pos=ret;
 202   stream->end_pos=ret2;
 203   stream->priv = vcd;
 204
 205   stream->fill_buffer = fill_buffer;
 206   stream->seek = seek;
 207   stream->close = close_s;
 208   *file_format = DEMUXER_TYPE_MPEG_PS;
 209
 210   m_struct_free(&stream_opts,opts);
 211   return STREAM_OK;
 212 }
 213
 214 const stream_info_t stream_info_vcd = {
 215   "Video CD",
 216   "vcd",
 217   "Albeu",
 218   "based on the code from ???",
 219   open_s,
 220   { "vcd", NULL },
 221   &stream_opts,
 222   1 // Urls are an option string
 223 };