summaryrefslogtreecommitdiffstats
path: root/stream/stream_vcd.c
blob: 2993b4c68c31ce1774bd256e0956a0710852a742 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188

#include "config.h"

#ifdef WIN32
#include <windows.h>
#endif

#include "mp_msg.h"
#include "stream.h"
#include "help_mp.h"
#include "m_option.h"
#include "m_struct.h"

#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#ifndef WIN32
#include <sys/ioctl.h>
#endif
#include <errno.h>

#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) || defined(__NetBSD__) || defined(__OpenBSD__)
#include "vcd_read_fbsd.h" 
#elif defined(SYS_DARWIN)
#include "vcd_read_darwin.h" 
#elif defined(WIN32)
#include "vcd_read_win32.h"
#else
#include "vcd_read.h"
#endif

#include "libmpdemux/demuxer.h"

extern char *cdrom_device;

static struct stream_priv_s {
  int track;
  char* device;
} stream_priv_dflts = {
  1,
  NULL
};

#define ST_OFF(f) M_ST_OFF(struct stream_priv_s,f)
/// URL definition
static m_option_t stream_opts_fields[] = {
  { "track", ST_OFF(track), CONF_TYPE_INT, M_OPT_MIN, 1, 0, NULL },
  { "device", ST_OFF(device), CONF_TYPE_STRING, 0, 0 ,0, NULL},
  /// For url parsing
  { "hostname", ST_OFF(track), CONF_TYPE_INT, M_OPT_MIN, 1, 0, NULL },
  { "filename", ST_OFF(device), CONF_TYPE_STRING, 0, 0 ,0, NULL},
  { NULL, NULL, 0, 0, 0, 0,  NULL }
};
static struct m_struct_st stream_opts = {
  "vcd",
  sizeof(struct stream_priv_s),
  &stream_priv_dflts,
  stream_opts_fields
};

static int fill_buffer(stream_t *s, char* buffer, int max_len){
  if(s->pos > s->end_pos) /// don't past end of current track
    return 0;
  return vcd_read(s->priv,buffer);
}

static int seek(stream_t *s,off_t newpos) {
  s->pos = newpos;
  vcd_set_msf(s->priv,s->pos/VCD_SECTOR_DATA);
  return 1;
}

static void close_s(stream_t *stream) {
  free(stream->priv);
}

static int open_s(stream_t *stream,int mode, void* opts, int* file_format) {
  struct stream_priv_s* p = (struct stream_priv_s*)opts;
  int ret,ret2,f,sect,tmp;
  mp_vcd_priv_t* vcd;
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  int bsize = VCD_SECTOR_SIZE;
#endif
#ifdef WIN32
  HANDLE hd;
  char device[] = "\\\\.\\?:";
#endif

  if(mode != STREAM_READ
#ifdef WIN32
      || GetVersion() > 0x80000000 // Win9x
#endif
      ) {
    m_struct_free(&stream_opts,opts);
    return STREAM_UNSUPORTED;
  }

  if (!p->device) {
    if(cdrom_device)
      p->device = strdup(cdrom_device);
    else
      p->device = strdup(DEFAULT_CDROM_DEVICE);
  }

#ifdef WIN32
  device[4] = p->device[0];
  /* open() can't be used for devices so do it the complicated way */
  hd = CreateFile(device, GENERIC_READ, FILE_SHARE_READ, NULL,
	  OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL);
  f = _open_osfhandle((long)hd, _O_RDONLY);
#else
  f=open(p->device,O_RDONLY);
#endif
  if(f<0){ 
    mp_msg(MSGT_OPEN,MSGL_ERR,MSGTR_CdDevNotfound,p->device);
    m_struct_free(&stream_opts,opts);
    return STREAM_ERROR;
  }

  vcd = vcd_read_toc(f);
  if(!vcd) {
    mp_msg(MSGT_OPEN,MSGL_ERR,"Failed to get cd toc\n");
    close(f);
    m_struct_free(&stream_opts,opts);
    return STREAM_ERROR;
  }
  ret2=vcd_get_track_end(vcd,p->track);
  if(ret2<0){
    mp_msg(MSGT_OPEN,MSGL_ERR,MSGTR_ErrTrackSelect " (get)\n");
    close(f);
    free(vcd);
    m_struct_free(&stream_opts,opts);
    return STREAM_ERROR;
  }
  ret=vcd_seek_to_track(vcd,p->track);
  if(ret<0){
    mp_msg(MSGT_OPEN,MSGL_ERR,MSGTR_ErrTrackSelect " (seek)\n");
    close(f);
    free(vcd);
    m_struct_free(&stream_opts,opts);
    return STREAM_ERROR;
  }
  /* search forward up to at most 3 seconds to skip leading margin */
  sect = ret / VCD_SECTOR_DATA;
  for (tmp = sect; tmp < sect + 3 * 75; tmp++) {
    char mem[VCD_SECTOR_DATA];
    //since MPEG packs are block-aligned we stop discarding sectors if they are non-null
    if (vcd_read(vcd, mem) != VCD_SECTOR_DATA || mem[2] || mem[3])
      break;
  }
  mp_msg(MSGT_OPEN, MSGL_DBG2, "%d leading sectors skipped\n", tmp - sect);
  vcd_set_msf(vcd, tmp);
  ret = tmp * VCD_SECTOR_DATA;

  mp_msg(MSGT_OPEN,MSGL_V,"VCD start byte position: 0x%X  end: 0x%X\n",ret,ret2);

#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  if (ioctl (f, CDRIOCSETBLOCKSIZE, &bsize) == -1) {
    mp_msg(MSGT_OPEN,MSGL_WARN,"Error in CDRIOCSETBLOCKSIZE");
  }
#endif

  stream->fd = f;
  stream->type = STREAMTYPE_VCD;
  stream->sector_size = VCD_SECTOR_DATA;
  stream->start_pos=ret;
  stream->end_pos=ret2;
  stream->priv = vcd;

  stream->fill_buffer = fill_buffer;
  stream->seek = seek;
  stream->close = close_s;
  *file_format = DEMUXER_TYPE_MPEG_PS;

  m_struct_free(&stream_opts,opts);
  return STREAM_OK;
}

stream_info_t stream_info_vcd = {
  "Video CD",
  "vcd",
  "Albeu",
  "based on the code from ???",
  open_s,
  { "vcd", NULL },
  &stream_opts,
  1 // Urls are an option string
};