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mpv/libmpdemux/vcd_read_bincue.h

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C
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//=================== VideoCD BinCue ==========================
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <libgen.h>
#define byte unsigned char
#define SIZERAW 2352
#define SIZEISO_MODE1 2048
#define SIZEISO_MODE2_RAW 2352
#define SIZEISO_MODE2_FORM1 2048
#define SIZEISO_MODE2_FORM2 2336
#define AUDIO 0
#define MODE1 1
#define MODE2 2
#define MODE1_2352 10
#define MODE2_2352 20
#define MODE1_2048 30
#define MODE2_2336 40
#define UNKNOWN -1
static FILE* fd_cue;
static int fd_bin = 0;
static char bin_filename[256];
static char cue_filename[256];
static char bincue_path[256];
typedef struct track
{
unsigned short mode;
unsigned short minute;
unsigned short second;
unsigned short frame;
/* (min*60 + sec) * 75 + fps */
unsigned long start_sector;
/* = the sizes in bytes off all tracks bevor this one */
/* its needed if there are mode1 tracks befor the mpeg tracks */
unsigned long start_offset;
/* unsigned char num[3]; */
} tTrack;
/* max 99 tracks on a cd */
static tTrack tracks[100];
static struct cue_track_pos {
int track;
unsigned short mode;
unsigned short minute;
unsigned short second;
unsigned short frame;
} cue_current_pos;
/* number of tracks on the cd */
static int nTracks = 0;
/* presumes Line is preloaded with the "current" line of the file */
int cue_getTrackinfo(char *Line, tTrack *track)
{
char inum[3];
char min;
char sec;
char fps;
int already_set = 0;
/* Get the 'mode' */
if (strncmp(&Line[2], "TRACK ", 6)==0)
{
/* strncpy(track->num, &Line[8], 2); track->num[2] = '\0'; */
track->mode = UNKNOWN;
if(strncmp(&Line[11], "AUDIO", 5)==0) track->mode = AUDIO;
if(strncmp(&Line[11], "MODE1/2352", 10)==0) track->mode = MODE1_2352;
if(strncmp(&Line[11], "MODE1/2048", 10)==0) track->mode = MODE1_2048;
if(strncmp(&Line[11], "MODE2/2352", 10)==0) track->mode = MODE2_2352;
if(strncmp(&Line[11], "MODE2/2336", 10)==0) track->mode = MODE2_2336;
}
else return(1);
/* Get the track indexes */
while(1) {
if(! fgets( Line, 256, fd_cue ) ) { break;}
if (strncmp(&Line[2], "TRACK ", 6)==0)
{
/* next track starting */
break;
}
/* Track 0 or 1, take the first an get fill the values*/
if (strncmp(&Line[4], "INDEX ", 6)==0)
{
/* check stuff here so if the answer is false the else stuff below won't be executed */
strncpy(inum, &Line[10], 2); inum[2] = '\0';
if ((already_set == 0) &&
((strcmp(inum, "00")==0) || (strcmp(inum, "01")==0)))
{
already_set = 1;
min = ((Line[13]-'0')<<4) | (Line[14]-'0');
sec = ((Line[16]-'0')<<4) | (Line[17]-'0');
fps = ((Line[19]-'0')<<4) | (Line[20]-'0');
track->minute = (((min>>4)*10) + (min&0xf));
track->second = (((sec>>4)*10) + (sec&0xf));
track->frame = (((fps>>4)*10) + (fps&0xf));
}
}
else if (strncmp(&Line[4], "PREGAP ", 7)==0) { ; /* ignore */ }
else if (strncmp(&Line[4], "FLAGS ", 6)==0) { ; /* ignore */ }
else mp_msg (MSGT_OPEN,MSGL_INFO,
"[bincue] Unexpected cuefile line: %s\n", Line);
}
return(0);
}
int cue_find_bin (char *firstline) {
int i,j;
char s[256];
char t[256];
/* get the filename out of that */
/* 12345 6 */
if (strncmp(firstline, "FILE \"",6)==0)
{
i = 0;
j = 0;
while ( firstline[6 + i] != '"')
{
bin_filename[j] = firstline[6 + i];
/* if I found a path info, than delete all bevor it */
switch (bin_filename[j])
{
case '\\':
j = 0;
break;
case '/':
j = 0;
break;
default:
j++;
}
i++;
}
bin_filename[j+1] = '\0';
}
/* now try to open that file, without path */
fd_bin = open (bin_filename, O_RDONLY);
if (fd_bin == -1)
{
mp_msg(MSGT_OPEN,MSGL_STATUS, "[bincue] bin filename tested: %s\n",
bin_filename);
/* now try to find it with the path of the cue file */
sprintf(s,"%s/%s",bincue_path, bin_filename);
fd_bin = open (s, O_RDONLY);
if (fd_bin == -1)
{
mp_msg(MSGT_OPEN,MSGL_STATUS,
"[bincue] bin filename tested: %s\n", s);
/* now I would say the whole filename is shit, build our own */
strncpy(s, cue_filename, strlen(cue_filename) - 3 );
s[strlen(cue_filename) - 3] = '\0';
strcat(s, "bin");
fd_bin = open (s, O_RDONLY);
if (fd_bin == -1)
{
mp_msg(MSGT_OPEN,MSGL_STATUS,
"[bincue] bin filename tested: %s\n", s);
/* ok try it with path */
sprintf(t,"%s/%s",bincue_path, s);
fd_bin = open (t, O_RDONLY);
if (fd_bin == -1)
{
mp_msg(MSGT_OPEN,MSGL_STATUS,
"[bincue] bin filename tested: %s\n",t);
/* now I would say the whole filename is shit, build our own */
strncpy(s, cue_filename, strlen(cue_filename) - 3 );
s[strlen(cue_filename) - 3] = '\0';
strcat(s, "img");
fd_bin = open (s, O_RDONLY);
if (fd_bin == -1)
{
mp_msg(MSGT_OPEN,MSGL_STATUS,
"[bincue] bin filename tested: %s \n", s);
/* ok try it with path */
sprintf(t,"%s/%s",bincue_path, s);
fd_bin = open (t, O_RDONLY);
if (fd_bin == -1)
{
mp_msg(MSGT_OPEN,MSGL_STATUS,
"[bincue] bin filename tested: %s\n", s);
/* I'll give up */
mp_msg(MSGT_OPEN,MSGL_ERR,
"[bincue] couldn't find the bin file - giving up\n");
return -1;
}
}
} else strcpy(bin_filename, t);
} else strcpy(bin_filename, s);
} else strcpy(bin_filename, s);
}
mp_msg(MSGT_OPEN,MSGL_INFO,
"[bincue] using bin file %s\n", bin_filename);
return 0;
}
static inline int cue_msf_2_sector(int minute, int second, int frame) {
return frame + (second + minute * 60 ) * 75;
}
static inline int cue_get_msf() {
return cue_msf_2_sector (cue_current_pos.minute,
cue_current_pos.second,
cue_current_pos.frame);
}
static inline void cue_set_msf(unsigned int sect){
cue_current_pos.frame=sect%75;
sect=sect/75;
cue_current_pos.second=sect%60;
sect=sect/60;
cue_current_pos.minute=sect;
}
static inline int cue_mode_2_sector_size(int mode)
{
switch (mode)
{
case AUDIO: return AUDIO;
case MODE1_2352: return SIZERAW;
case MODE1_2048: return SIZEISO_MODE1;
case MODE2_2352: return SIZEISO_MODE2_RAW;
case MODE2_2336: return SIZEISO_MODE2_FORM2;
default:
mp_msg(MSGT_OPEN,MSGL_FATAL,
"[bincue] unknown mode for binfile. should not happen. aborting\n");
abort();
}
}
int cue_read_cue (char *in_cue_filename)
{
struct stat filestat;
char sLine[256];
unsigned int sect;
char *s,*t;
int i;
/* we have no tracks at the beginning */
nTracks = 0;
fd_bin = 0;
/* split the filename into a path and filename part */
s = strdup(in_cue_filename);
t = dirname(s);
printf ("dirname: %s\n", t);
strcpy(bincue_path,t);
/* no path at all? */
if (strcmp(bincue_path, ".") == 0) {
printf ("bincue_path: %s\n", bincue_path);
strcpy(cue_filename,in_cue_filename);
} else {
strcpy(cue_filename,in_cue_filename + strlen(bincue_path) + 1);
}
/* open the cue file */
fd_cue = fopen (in_cue_filename, "r");
if (fd_cue == NULL)
{
mp_msg(MSGT_OPEN,MSGL_ERR,
"[bincue] cannot open %s\n", in_cue_filename);
return -1;
}
/* read the first line and hand it to find_bin, which will
test more than one possible name of the file */
if(! fgets( sLine, 256, fd_cue ) )
{
mp_msg(MSGT_OPEN,MSGL_ERR,
"[bincue] error reading from %s\n", in_cue_filename);
fclose (fd_cue);
return -1;
}
if (cue_find_bin(sLine)) {
fclose (fd_cue);
return -1;
}
/* now build the track list */
/* red the next line and call our track finder */
if(! fgets( sLine, 256, fd_cue ) )
{
mp_msg(MSGT_OPEN,MSGL_ERR,
"[bincue] error reading from %s\n", in_cue_filename);
fclose (fd_cue);
return -1;
}
while(!feof(fd_cue))
{
if (cue_getTrackinfo(sLine, &tracks[nTracks++]) != 0)
{
mp_msg(MSGT_OPEN,MSGL_ERR,
"[bincue] error reading from %s\n", in_cue_filename);
fclose (fd_cue);
return -1;
}
}
/* make a fake track with stands for the Lead out */
if (fstat (fd_bin, &filestat) == -1) {
mp_msg(MSGT_OPEN,MSGL_ERR,
"[bincue] error getting size of bin file\n");
fclose (fd_cue);
return -1;
}
sect = filestat.st_size / 2352;
tracks[nTracks].frame = sect%75;
sect=sect/75;
tracks[nTracks].second = sect%60;
sect=sect/60;
tracks[nTracks].minute = sect;
/* lets calculate the start sectors and offsets */
for(i = 0; i <= nTracks; i++)
{
tracks[i].start_sector = cue_msf_2_sector(tracks[i].minute,
tracks[nTracks].second,
tracks[nTracks].frame);
/* if we're the first track we don't need to offset of the one befor */
if (i == 0)
{
/* was always 0 on my svcds, but who knows */
tracks[0].start_offset = tracks[0].start_sector *
cue_mode_2_sector_size(tracks[0].mode);
} else
{
tracks[i].start_offset = tracks[i-1].start_offset +
(tracks[i].start_sector - tracks[i-1].start_sector) *
cue_mode_2_sector_size(tracks[i-1].mode);
}
}
fclose (fd_cue);
return fd_bin;
}
int cue_read_toc_entry() {
int track = cue_current_pos.track - 1;
/* check if its a valid track, if not return -1 */
if (track >= nTracks)
return -1;
switch (tracks[track].mode)
{
case AUDIO:
cue_current_pos.mode = AUDIO;
break;
case MODE1_2352:
cue_current_pos.mode = MODE1;
break;
case MODE1_2048:
cue_current_pos.mode = MODE1;
break;
default: /* MODE2_2352 and MODE2_2336 */
cue_current_pos.mode = MODE2;
}
cue_current_pos.minute = tracks[track].minute;
cue_current_pos.second = tracks[track].second;
cue_current_pos.frame = tracks[track].frame;
return 0;
}
int cue_read_raw(char *buf) {
int position;
int track = cue_current_pos.track - 1;
/* get the mode of the bin file part and calc the positon */
position = tracks[track].start_offset +
(cue_msf_2_sector(cue_current_pos.minute,
cue_current_pos.second,
cue_current_pos.frame) -
tracks[track].start_sector)
* cue_mode_2_sector_size(tracks[track].mode);
/* check if the track is at its end*/
if (position >= tracks[track+1].start_offset)
return -1;
if (lseek (fd_bin, position, SEEK_SET) == -1) {
mp_msg(MSGT_OPEN,MSGL_ERR,
"[bincue] unexpected end of bin file\n");
return -1;
}
if (!read (fd_bin, buf, VCD_SECTOR_SIZE))
return -1;
else
return VCD_SECTOR_DATA;
}
int cue_vcd_seek_to_track (int track){
cue_current_pos.track = track;
if (cue_read_toc_entry ())
return -1;
return VCD_SECTOR_DATA * cue_get_msf();
}
int cue_vcd_get_track_end (int track){
cue_current_pos.frame = tracks[track].frame;
cue_current_pos.second = tracks[track].second;
cue_current_pos.minute = tracks[track].minute;
return VCD_SECTOR_DATA * cue_get_msf();
}
void cue_vcd_read_toc(){
int i;
for (i = 0; i < nTracks; ++i) {
mp_msg(MSGT_OPEN,MSGL_INFO,
"track %02d: format=%d %02d:%02d:%02d\n",
i,
tracks[i].mode,
tracks[i].minute,
tracks[i].second,
tracks[i].frame
);
}
}
static char vcd_buf[VCD_SECTOR_SIZE];
static int cue_vcd_read(char *mem){
if (cue_read_raw(vcd_buf)==-1) return 0; // EOF?
memcpy(mem,&vcd_buf[VCD_SECTOR_OFFS],VCD_SECTOR_DATA);
cue_current_pos.frame++;
if (cue_current_pos.frame==75){
cue_current_pos.frame=0;
cue_current_pos.second++;
if (cue_current_pos.second==60){
cue_current_pos.second=0;
cue_current_pos.minute++;
}
}
return VCD_SECTOR_DATA;
}
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