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 "mp_msg.h"
  26 #include "stream.h"
  27 #include "help_mp.h"
  28 #include "m_option.h"
  29 #include "m_struct.h"
  30
  31 #include <fcntl.h>
  32 #include <stdlib.h>
  33 #include <unistd.h>
  34 #if !defined(__MINGW32__) && !defined(__CYGWIN__)
  35 #include <sys/ioctl.h>
  36 #endif
  37 #include <errno.h>
  38
  39 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) || defined(__NetBSD__) || defined(__OpenBSD__)
  40 #include "vcd_read_fbsd.h"
  41 #elif defined(__APPLE__)
  42 #include "vcd_read_darwin.h"
  43 #elif defined(__MINGW32__) || defined(__CYGWIN__)
  44 #include "vcd_read_win32.h"
  45 #else
  46 #include "vcd_read.h"
  47 #endif
  48
  49 #include "libmpdemux/demuxer.h"
  50
  51 extern char *cdrom_device;
  52
  53 static struct stream_priv_s {
  54   int track;
  55   char* device;
  56 } stream_priv_dflts = {
  57   1,
  58   NULL
  59 };
  60
  61 #define ST_OFF(f) M_ST_OFF(struct stream_priv_s,f)
  62 /// URL definition
  63 static const m_option_t stream_opts_fields[] = {
  64   { "track", ST_OFF(track), CONF_TYPE_INT, M_OPT_MIN, 1, 0, NULL },
  65   { "device", ST_OFF(device), CONF_TYPE_STRING, 0, 0 ,0, NULL},
  66   /// For url parsing
  67   { "hostname", ST_OFF(track), CONF_TYPE_INT, M_OPT_MIN, 1, 0, NULL },
  68   { "filename", ST_OFF(device), CONF_TYPE_STRING, 0, 0 ,0, NULL},
  69   { NULL, NULL, 0, 0, 0, 0,  NULL }
  70 };
  71 static const struct m_struct_st stream_opts = {
  72   "vcd",
  73   sizeof(struct stream_priv_s),
  74   &stream_priv_dflts,
  75   stream_opts_fields
  76 };
  77
  78 static int fill_buffer(stream_t *s, char* buffer, int max_len){
  79   if(s->pos > s->end_pos) /// don't past end of current track
  80     return 0;
  81   return vcd_read(s->priv,buffer);
  82 }
  83
  84 static int seek(stream_t *s,off_t newpos) {
  85   s->pos = newpos;
  86   vcd_set_msf(s->priv,s->pos/VCD_SECTOR_DATA);
  87   return 1;
  88 }
  89
  90 static void close_s(stream_t *stream) {
  91   free(stream->priv);
  92 }
  93
  94 static int open_s(stream_t *stream,int mode, void* opts, int* file_format) {
  95   struct stream_priv_s* p = (struct stream_priv_s*)opts;
  96   int ret,ret2,f,sect,tmp;
  97   mp_vcd_priv_t* vcd;
  98 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  99   int bsize = VCD_SECTOR_SIZE;
 100 #endif
 101 #if defined(__MINGW32__) || defined(__CYGWIN__)
 102   HANDLE hd;
 103   char device[] = "\\\\.\\?:";
 104 #endif
 105
 106   if(mode != STREAM_READ
 107 #if defined(__MINGW32__) || defined(__CYGWIN__)
 108       || GetVersion() > 0x80000000 // Win9x
 109 #endif
 110       ) {
 111     m_struct_free(&stream_opts,opts);
 112     return STREAM_UNSUPPORTED;
 113   }
 114
 115   if (!p->device) {
 116     if(cdrom_device)
 117       p->device = strdup(cdrom_device);
 118     else
 119       p->device = strdup(DEFAULT_CDROM_DEVICE);
 120   }
 121
 122 #if defined(__MINGW32__) || defined(__CYGWIN__)
 123   device[4] = p->device[0];
 124   /* open() can't be used for devices so do it the complicated way */
 125   hd = CreateFile(device, GENERIC_READ, FILE_SHARE_READ, NULL,
 126           OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL);
 127   f = _open_osfhandle((long)hd, _O_RDONLY);
 128 #else
 129   f=open(p->device,O_RDONLY);
 130 #endif
 131   if(f<0){
 132     mp_tmsg(MSGT_OPEN,MSGL_ERR,"CD-ROM Device '%s' not found.\n",p->device);
 133     m_struct_free(&stream_opts,opts);
 134     return STREAM_ERROR;
 135   }
 136
 137   vcd = vcd_read_toc(f);
 138   if(!vcd) {
 139     mp_msg(MSGT_OPEN,MSGL_ERR,"Failed to get cd toc\n");
 140     close(f);
 141     m_struct_free(&stream_opts,opts);
 142     return STREAM_ERROR;
 143   }
 144   ret2=vcd_get_track_end(vcd,p->track);
 145   if(ret2<0){
 146       mp_msg(MSGT_OPEN, MSGL_ERR, "%s (get)\n",
 147              mp_gtext("Error selecting VCD track."));
 148     close(f);
 149     free(vcd);
 150     m_struct_free(&stream_opts,opts);
 151     return STREAM_ERROR;
 152   }
 153   ret=vcd_seek_to_track(vcd,p->track);
 154   if(ret<0){
 155       mp_msg(MSGT_OPEN, MSGL_ERR, "%s (seek)\n",
 156              mp_gtext("Error selecting VCD track."));
 157     close(f);
 158     free(vcd);
 159     m_struct_free(&stream_opts,opts);
 160     return STREAM_ERROR;
 161   }
 162   /* search forward up to at most 3 seconds to skip leading margin */
 163   sect = ret / VCD_SECTOR_DATA;
 164   for (tmp = sect; tmp < sect + 3 * 75; tmp++) {
 165     char mem[VCD_SECTOR_DATA];
 166     //since MPEG packs are block-aligned we stop discarding sectors if they are non-null
 167     if (vcd_read(vcd, mem) != VCD_SECTOR_DATA || mem[2] || mem[3])
 168       break;
 169   }
 170   mp_msg(MSGT_OPEN, MSGL_DBG2, "%d leading sectors skipped\n", tmp - sect);
 171   vcd_set_msf(vcd, tmp);
 172   ret = tmp * VCD_SECTOR_DATA;
 173
 174   mp_msg(MSGT_OPEN,MSGL_V,"VCD start byte position: 0x%X  end: 0x%X\n",ret,ret2);
 175
 176 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 177   if (ioctl (f, CDRIOCSETBLOCKSIZE, &bsize) == -1) {
 178     mp_msg(MSGT_OPEN,MSGL_WARN,"Error in CDRIOCSETBLOCKSIZE");
 179   }
 180 #endif
 181
 182   stream->fd = f;
 183   stream->type = STREAMTYPE_VCD;
 184   stream->sector_size = VCD_SECTOR_DATA;
 185   stream->start_pos=ret;
 186   stream->end_pos=ret2;
 187   stream->priv = vcd;
 188
 189   stream->fill_buffer = fill_buffer;
 190   stream->seek = seek;
 191   stream->close = close_s;
 192   *file_format = DEMUXER_TYPE_MPEG_PS;
 193
 194   m_struct_free(&stream_opts,opts);
 195   return STREAM_OK;
 196 }
 197
 198 const stream_info_t stream_info_vcd = {
 199   "Video CD",
 200   "vcd",
 201   "Albeu",
 202   "based on the code from ???",
 203   open_s,
 204   { "vcd", NULL },
 205   &stream_opts,
 206   1 // Urls are an option string
 207 };