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cdrom: increase retry time, use alternate method for reading sub-channel data (not all drives can read Q data from READ CD)

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This commit is contained in:
Brad Parker 2019-06-25 19:34:29 -04:00
parent 8af3078966
commit 93b81198c2
2 changed files with 42 additions and 25 deletions
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65
libretro-common/cdrom/cdrom.c
View File

@ -32,8 +32,10 @@
#include <retro_math.h>
#include <streams/file_stream.h>
#include <retro_endianness.h>
#include <retro_miscellaneous.h>
#include <math.h>
#include <unistd.h>
#ifdef __linux__
#include <stropts.h>
@ -83,7 +85,7 @@ static int cdrom_send_command(int fd, CDROM_CMD_Direction dir, void *buf, size_t
unsigned char sense[SG_MAX_SENSE] = {0};
unsigned char *xfer_buf;
int rv;
unsigned char retries_left = 5;
unsigned char retries_left = 10;
if (!cmd || cmd_len == 0)
return 1;
@ -122,6 +124,20 @@ static int cdrom_send_command(int fd, CDROM_CMD_Direction dir, void *buf, size_t
sgio.mx_sb_len = sizeof(sense);
sgio.timeout = 30000;
retry:
#ifdef CDROM_DEBUG
{
unsigned i;
printf("CDROM Send Command: ");
for (i = 0; i < cmd_len / sizeof(*cmd); i++)
{
printf("%02X ", cmd[i]);
}
printf("\n");
}
#endif
rv = ioctl(fd, SG_IO, &sgio);
if (sgio.info & SG_INFO_CHECK)
@ -129,22 +145,31 @@ retry:
unsigned i;
const char *sense_key_text = NULL;
if ((sense[2] & 0xF) == 3)
switch (sense[2] & 0xF)
{
if (retries_left)
{
case 0:
case 2:
case 3:
case 4:
if (retries_left)
{
#ifdef CDROM_DEBUG
printf("CDROM Read Retry...\n");
printf("CDROM Read Retry...\n");
#endif
retries_left--;
goto retry;
}
else
{
retries_left--;
usleep(1000 * 1000);
goto retry;
}
else
{
#ifdef CDROM_DEBUG
printf("CDROM Read Retries failed, giving up.\n");
printf("CDROM Read Retries failed, giving up.\n");
#endif
}
}
break;
default:
break;
}
#ifdef CDROM_DEBUG
@ -400,7 +425,7 @@ int cdrom_write_cue(int fd, char **out_buf, size_t *out_len, char cdrom_drive, u
{
/*unsigned char session_num = buf[4 + (i * 11) + 0];*/
unsigned char adr = (buf[4 + (i * 11) + 1] >> 4) & 0xF;
/*unsigned char control = buf[4 + (i * 11) + 1] & 0xF;*/
unsigned char control = buf[4 + (i * 11) + 1] & 0xF;
unsigned char tno = buf[4 + (i * 11) + 2];
unsigned char point = buf[4 + (i * 11) + 3];
unsigned char pmin = buf[4 + (i * 11) + 8];
@ -415,23 +440,15 @@ int cdrom_write_cue(int fd, char **out_buf, size_t *out_len, char cdrom_drive, u
unsigned char next_pmin = (pframe == 74) ? (psec < 59 ? pmin : pmin + 1) : pmin;
unsigned char next_psec = (pframe == 74) ? (psec < 59 ? (psec + 1) : 0) : psec;
unsigned char next_pframe = (pframe < 74) ? (pframe + 1) : 0;
/* MMC Command: READ CD MSF */
unsigned char q_cdb[] = {0xB9, 0, 0, pmin, psec, pframe, next_pmin, next_psec, next_pframe, 0, 0x2, 0};
unsigned char q_buf[3] = {0};
unsigned char mode = 1;
bool audio = false;
const char *track_type = "MODE1/2352";
rv = cdrom_send_command(fd, DIRECTION_IN, q_buf, sizeof(q_buf), q_cdb, sizeof(q_cdb), 0);
if (rv)
continue;
mode = q_buf[0] & 0xF;
audio = (q_buf[0] & 0x40) == 0;
mode = adr;
audio = (!(control & 0x4) && !(control & 0x5));
#ifdef CDROM_DEBUG
printf("Track %02d CONTROL %02X %02X %02X MODE %d AUDIO? %d\n", point, q_buf[0], q_buf[1], q_buf[2], mode, audio);
printf("Track %02d CONTROL %01X ADR %01X MODE %d AUDIO? %d\n", point, control, adr, mode, audio);
#endif
toc->track[point - 1].track_num = point;

2
libretro-common/vfs/vfs_implementation_cdrom.c
View File

@ -78,7 +78,7 @@ int64_t retro_vfs_file_seek_cdrom(libretro_vfs_implementation_file *stream, int6
unsigned char end_min = 0;
unsigned char end_sec = 0;
unsigned char end_frame = 0;
size_t end_lba = vfs_cdrom_toc.track[vfs_cdrom_toc.num_tracks - 1].lba_start + vfs_cdrom_toc.track[vfs_cdrom_toc.num_tracks - 1].track_size;
size_t end_lba = (vfs_cdrom_toc.track[vfs_cdrom_toc.num_tracks - 1].lba_start + vfs_cdrom_toc.track[vfs_cdrom_toc.num_tracks - 1].track_size) - 1;
lba_to_msf(end_lba, &min, &sec, &frame);