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 "help_mp.h"
  30 #include "m_option.h"
  31 #include "m_struct.h"
  32
  33 #include <fcntl.h>
  34 #include <stdlib.h>
  35 #include <unistd.h>
  36 #if !defined(__MINGW32__) && !defined(__CYGWIN__)
  37 #include <sys/ioctl.h>
  38 #endif
  39 #include <errno.h>
  40
  41 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) || defined(__NetBSD__) || defined(__OpenBSD__)
  42 #include "vcd_read_fbsd.h"
  43 #elif defined(__APPLE__)
  44 #include "vcd_read_darwin.h"
  45 #elif defined(__MINGW32__) || defined(__CYGWIN__)
  46 #include "vcd_read_win32.h"
  47 #elif defined(__OS2__)
  48 #include "vcd_read_os2.h"
  49 #else
  50 #include "vcd_read.h"
  51 #endif
  52
  53 #include "libmpdemux/demuxer.h"
  54
  55 extern char *cdrom_device;
  56
  57 static struct stream_priv_s {
  58   int track;
  59   char* device;
  60 } stream_priv_dflts = {
  61   1,
  62   NULL
  63 };
  64
  65 #define ST_OFF(f) M_ST_OFF(struct stream_priv_s,f)
  66 /// URL definition
  67 static const m_option_t stream_opts_fields[] = {
  68   { "track", ST_OFF(track), CONF_TYPE_INT, M_OPT_MIN, 1, 0, NULL },
  69   { "device", ST_OFF(device), CONF_TYPE_STRING, 0, 0 ,0, NULL},
  70   /// For url parsing
  71   { "hostname", ST_OFF(track), CONF_TYPE_INT, M_OPT_MIN, 1, 0, NULL },
  72   { "filename", ST_OFF(device), CONF_TYPE_STRING, 0, 0 ,0, NULL},
  73   { NULL, NULL, 0, 0, 0, 0,  NULL }
  74 };
  75 static const struct m_struct_st stream_opts = {
  76   "vcd",
  77   sizeof(struct stream_priv_s),
  78   &stream_priv_dflts,
  79   stream_opts_fields
  80 };
  81
  82 static int fill_buffer(stream_t *s, char* buffer, int max_len){
  83   if(s->pos > s->end_pos) /// don't past end of current track
  84     return 0;
  85   return vcd_read(s->priv,buffer);
  86 }
  87
  88 static int seek(stream_t *s,off_t newpos) {
  89   s->pos = newpos;
  90   vcd_set_msf(s->priv,s->pos/VCD_SECTOR_DATA);
  91   return 1;
  92 }
  93
  94 static void close_s(stream_t *stream) {
  95   free(stream->priv);
  96 }
  97
  98 static int open_s(stream_t *stream,int mode, void* opts, int* file_format) {
  99   struct stream_priv_s* p = opts;
 100   int ret,ret2,f,sect,tmp;
 101   mp_vcd_priv_t* vcd;
 102 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 103   int bsize = VCD_SECTOR_SIZE;
 104 #endif
 105 #if defined(__MINGW32__) || defined(__CYGWIN__)
 106   HANDLE hd;
 107   char device[] = "\\\\.\\?:";
 108 #endif
 109 #if defined(__OS2__)
 110   char device[] = "X:";
 111   HFILE hcd;
 112   ULONG ulAction;
 113   ULONG rc;
 114 #endif
 115
 116   if(mode != STREAM_READ
 117 #if defined(__MINGW32__) || defined(__CYGWIN__)
 118       || GetVersion() > 0x80000000 // Win9x
 119 #endif
 120       ) {
 121     m_struct_free(&stream_opts,opts);
 122     return STREAM_UNSUPPORTED;
 123   }
 124
 125   if (!p->device) {
 126     if(cdrom_device)
 127       p->device = strdup(cdrom_device);
 128     else
 129       p->device = strdup(DEFAULT_CDROM_DEVICE);
 130   }
 131
 132 #if defined(__MINGW32__) || defined(__CYGWIN__)
 133   device[4] = p->device[0];
 134   /* open() can't be used for devices so do it the complicated way */
 135   hd = CreateFile(device, GENERIC_READ, FILE_SHARE_READ, NULL,
 136           OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL);
 137   f = _open_osfhandle((long)hd, _O_RDONLY);
 138 #elif defined(__OS2__)
 139   device[0] = p->device[0];
 140   rc = DosOpen(device, &hcd, &ulAction, 0, FILE_NORMAL,
 141                OPEN_ACTION_OPEN_IF_EXISTS | OPEN_ACTION_FAIL_IF_NEW,
 142                OPEN_ACCESS_READONLY | OPEN_SHARE_DENYNONE | OPEN_FLAGS_DASD,
 143                NULL);
 144   f = rc ? -1 : hcd;
 145 #else
 146   f=open(p->device,O_RDONLY);
 147 #endif
 148   if(f<0){
 149     mp_msg(MSGT_OPEN,MSGL_ERR,MSGTR_CdDevNotfound,p->device);
 150     m_struct_free(&stream_opts,opts);
 151     return STREAM_ERROR;
 152   }
 153
 154   vcd = vcd_read_toc(f);
 155   if(!vcd) {
 156     mp_msg(MSGT_OPEN,MSGL_ERR,"Failed to get cd toc\n");
 157     close(f);
 158     m_struct_free(&stream_opts,opts);
 159     return STREAM_ERROR;
 160   }
 161   ret2=vcd_get_track_end(vcd,p->track);
 162   if(ret2<0){
 163     mp_msg(MSGT_OPEN,MSGL_ERR,MSGTR_ErrTrackSelect " (get)\n");
 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,MSGTR_ErrTrackSelect " (seek)\n");
 172     close(f);
 173     free(vcd);
 174     m_struct_free(&stream_opts,opts);
 175     return STREAM_ERROR;
 176   }
 177   /* search forward up to at most 3 seconds to skip leading margin */
 178   sect = ret / VCD_SECTOR_DATA;
 179   for (tmp = sect; tmp < sect + 3 * 75; tmp++) {
 180     char mem[VCD_SECTOR_DATA];
 181     //since MPEG packs are block-aligned we stop discarding sectors if they are non-null
 182     if (vcd_read(vcd, mem) != VCD_SECTOR_DATA || mem[2] || mem[3])
 183       break;
 184   }
 185   mp_msg(MSGT_OPEN, MSGL_DBG2, "%d leading sectors skipped\n", tmp - sect);
 186   vcd_set_msf(vcd, tmp);
 187   ret = tmp * VCD_SECTOR_DATA;
 188
 189   mp_msg(MSGT_OPEN,MSGL_V,"VCD start byte position: 0x%X  end: 0x%X\n",ret,ret2);
 190
 191 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 192   if (ioctl (f, CDRIOCSETBLOCKSIZE, &bsize) == -1) {
 193     mp_msg(MSGT_OPEN,MSGL_WARN,"Error in CDRIOCSETBLOCKSIZE");
 194   }
 195 #endif
 196
 197   stream->fd = f;
 198   stream->type = STREAMTYPE_VCD;
 199   stream->sector_size = VCD_SECTOR_DATA;
 200   stream->start_pos=ret;
 201   stream->end_pos=ret2;
 202   stream->priv = vcd;
 203
 204   stream->fill_buffer = fill_buffer;
 205   stream->seek = seek;
 206   stream->close = close_s;
 207   *file_format = DEMUXER_TYPE_MPEG_PS;
 208
 209   m_struct_free(&stream_opts,opts);
 210   return STREAM_OK;
 211 }
 212
 213 const stream_info_t stream_info_vcd = {
 214   "Video CD",
 215   "vcd",
 216   "Albeu",
 217   "based on the code from ???",
 218   open_s,
 219   { "vcd", NULL },
 220   &stream_opts,
 221   1 // Urls are an option string
 222 };