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/******************************************************************
* CopyPolicy: GNU Lessger General Public License 2.1 applies
* Copyright (C) Monty xiphmont@mit.edu
*
* Fake interface backend for testing paranoia layer
*
******************************************************************/
#ifdef CDDA_TEST
#include "low_interface.h"
#include "utils.h"
/* Build which test model? */
#define CDDA_TEST_OK
#undef CDDA_TEST_JITTER_SMALL
#undef CDDA_TEST_JITTER_LARGE
#undef CDDA_TEST_JITTER_MASSIVE
#undef CDDA_TEST_FRAG_SMALL
#undef CDDA_TEST_FRAG_LARGE
#undef CDDA_TEST_FRAG_MASSIVE
#undef CDDA_TEST_BOGUS_BYTES
#undef CDDA_TEST_DROPDUPE_BYTES
#undef CDDA_TEST_SCRATCH
#undef CDDA_TEST_UNDERRUN
#undef CDDA_TEST_ALLJITTER
#undef CDDA_TEST_SOMEJITTER
#undef CDDA_TEST_SEEKJITTER
static int test_readtoc (cdrom_drive *d){
int tracks=0;
long bytes;
long sectors;
/* only one track, as many sectors as the file */
bytes=lseek(d->cdda_fd,0,SEEK_END);
lseek(d->cdda_fd,0,SEEK_SET);
sectors=bytes/CD_FRAMESIZE_RAW;
d->disc_toc[0].bFlags = 0;
d->disc_toc[0].bTrack = 1;
d->disc_toc[0].dwStartSector = 37;
d->disc_toc[1].bFlags = 0x4;
d->disc_toc[1].bTrack = CDROM_LEADOUT;
d->disc_toc[1].dwStartSector = sectors+37;
tracks=2;
d->cd_extra=0;
return(--tracks); /* without lead-out */
}
/* we emulate jitter, scratches, atomic jitter and bogus bytes on
boundaries, etc */
static long test_read(cdrom_drive *d, void *p, long begin, long sectors){
int jitter_flag=0;
int los_flag=0;
static int jitter=0;
int bytes_so_far=0;
long bytestotal;
static FILE *fd=NULL;
static long lastread=0;
if(!fd)fd=fdopen(d->cdda_fd,"r");
if(begin<lastread)
d->private_data->last_milliseconds=20;
else
d->private_data->last_milliseconds=sectors;
#ifdef CDDA_TEST_UNDERRUN
sectors-=1;
#endif
#ifdef CDDA_TEST_SEEKJITTER
if(lastread!=begin)jitter_flag=1;
#else
#ifdef CDDA_TEST_ALLJITTER
jitter_flag=1;
#else
#ifdef CDDA_TEST_SOMEJITTER
jitter_flag=(drand48()>.9?1:0);
los_flag=(drand48()>.9?1:0);
#else
los_flag=1;
#endif
#endif
#endif
lastread=begin+sectors;
bytestotal=sectors*CD_FRAMESIZE_RAW;
begin*=CD_FRAMESIZE_RAW;
while(bytes_so_far<bytestotal){
int inner_bytes=bytestotal-bytes_so_far;
char *inner_buf=(p ? p+bytes_so_far : NULL);
long seeki;
long rbytes;
long this_bytes=inner_bytes;
#ifdef CDDA_TEST_OK
#else
#ifdef CDDA_TEST_JITTER_SMALL
if(jitter_flag)jitter=4*(int)((drand48()-.5)*CD_FRAMESIZE_RAW/8);
#else
#ifdef CDDA_TEST_JITTER_LARGE
if(jitter_flag)jitter=32*(int)((drand48()-.5)*CD_FRAMESIZE_RAW/8);
#else
#ifdef CDDA_TEST_JITTER_MASSIVE
if(jitter_flag)jitter=128*(int)((drand48()-.5)*CD_FRAMESIZE_RAW/8);
#else
#ifdef CDDA_TEST_FRAG_SMALL
if(los_flag)this_bytes=256*(int)(drand48()*CD_FRAMESIZE_RAW/8);
if(jitter_flag)jitter=4*(int)((drand48()-.5)*CD_FRAMESIZE_RAW/8);
#else
#ifdef CDDA_TEST_FRAG_LARGE
if(los_flag)this_bytes=16*(int)(drand48()*CD_FRAMESIZE_RAW/8);
if(jitter_flag)jitter=4*(int)((drand48()-.5)*CD_FRAMESIZE_RAW/8);
#else
#ifdef CDDA_TEST_FRAG_MASSIVE
if(los_flag)this_bytes=8*(int)(drand48()*CD_FRAMESIZE_RAW/8);
if(jitter_flag)jitter=32*(int)((drand48()-.5)*CD_FRAMESIZE_RAW/8);
#else
#ifdef CDDA_TEST_DROPDUPE_BYTES
if(los_flag)this_bytes=CD_FRAMESIZE_RAW;
if(jitter_flag)
if (drand48()>.8)
this_jitter=32;
else
this_jitter=0;
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
if(this_bytes>inner_bytes)this_bytes=inner_bytes;
if(begin+jitter+bytes_so_far<0)jitter=0;
seeki=begin+bytes_so_far+jitter;
if(fseek(fd,seeki,SEEK_SET)<0){
return(0);
}
if(!inner_buf){
char *temp = malloc(this_bytes);
rbytes=fread(temp,1,this_bytes,fd);
free(temp);
}else
rbytes=fread(inner_buf,1,this_bytes,fd);
bytes_so_far+=rbytes;
if(rbytes==0)break;
#ifdef CDDA_TEST_SEEKJITTER
jitter_flag=0;
los_flag=0;
#else
#ifdef CDDA_TEST_ALLJITTER
jitter_flag=1;
los_flag=0;
#else
#ifdef CDDA_TEST_SOMEJITTER
jitter_flag=(drand48()>.9?1:0);
los_flag=(drand48()>.9?1:0);
#else
los_flag=1;
#endif
#endif
#endif
}
#ifdef CDDA_TEST_SCRATCH
{
long location=300*CD_FRAMESIZE_RAW+(drand48()*56)+512;
if(begin<=location && begin+bytestotal>location){
if(p)memset(p+location-begin,(int)(drand48()*256),1100);
}
}
#endif
return(sectors);
}
/* hook */
static int Dummy (cdrom_drive *d,int Switch){
return(0);
}
/* set function pointers to use the ioctl routines */
int test_init_drive (cdrom_drive *d){
d->nsectors=13;
d->enable_cdda = Dummy;
d->read_audio = test_read;
d->read_toc = test_readtoc;
d->set_speed = Dummy;
d->tracks=d->read_toc(d);
if(d->tracks==-1)
return(d->tracks);
d->opened=1;
srand48(0);
return(0);
}
#endif
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