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libburn/libburn/read.c

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/* -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 8; -*- */
/* Copyright (c) 2004 - 2006 Derek Foreman, Ben Jansens
Copyright (c) 2006 - 2014 Thomas Schmitt <scdbackup@gmx.net>
Provided under GPL version 2 or later.
*/
#ifdef HAVE_CONFIG_H
#include "../config.h"
#endif
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
/* ts A61007 */
/* #include <a ssert.h> */
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <fcntl.h>
#include <errno.h>
/* ts B41126 : O_BINARY is needed for Cygwin but undefined elsewhere */
#ifndef O_BINARY
#define O_BINARY 0
#endif
#include "sector.h"
#include "libburn.h"
#include "drive.h"
#include "transport.h"
/* ts A60925 : obsoleted by libdax_msgs.h
#include "message.h"
*/
#include "crc.h"
#include "debug.h"
#include "init.h"
#include "toc.h"
#include "util.h"
#include "mmc.h"
#include "sg.h"
#include "read.h"
#include "options.h"
/* ts A70812 */
#include "error.h"
#include "libdax_msgs.h"
extern struct libdax_msgs *libdax_messenger;
void burn_disc_read(struct burn_drive *d, const struct burn_read_opts *o)
{
#if 0
int i, end, maxsects, finish;
int seclen;
int drive_lba;
unsigned short crc;
unsigned char fakesub[96];
struct buffer page; <- needs to become dynamic memory
int speed;
/* ts A61007 : if this function gets revived, then these
tests have to be done more graceful */
a ssert((o->version & 0xfffff000) == (OPTIONS_VERSION & 0xfffff000));
a ssert(!d->busy);
a ssert(d->toc->valid);
a ssert(o->datafd != -1);
/* moved up from spc_select_error_params alias d->send_parameters() */
a ssert(d->mdata->valid);
/* XXX not sure this is a good idea. copy it? */
/* XXX also, we have duplicated data now, do we remove the fds from struct
drive, or only store a subset of the _opts structs in drives */
/* set the speed on the drive */
speed = o->speed > 0 ? o->speed : d->mdata->max_read_speed;
d->set_speed(d, speed, 0);
d->params.retries = o->hardware_error_retries;
d->send_parameters(d, o);
d->cancel = 0;
d->busy = BURN_DRIVE_READING;
d->currsession = 0;
/* drive_lba = 232000;
d->currtrack = 18;
*/
d->currtrack = 0;
drive_lba = 0;
/* XXX removal of this line obviously breaks *
d->track_end = burn_track_end(d, d->currsession, d->currtrack);*/
printf("track ends at %d\n", d->track_end);
page.sectors = 0;
page.bytes = 0;
if (o->subfd != -1) {
memset(fakesub, 0xFF, 12);
memset(fakesub + 12, 0, 84);
fakesub[13] = 1;
fakesub[14] = 1;
fakesub[20] = 2;
fakesub[12] = (d->toc->toc_entry[0].control << 4) +
d->toc->toc_entry[0].adr;
#ifdef Libburn_no_crc_C
crc = 0; /* dummy */
#else
crc = crc_ccitt(fakesub + 12, 10);
#endif
fakesub[22] = crc >> 8;
fakesub[23] = crc & 0xFF;
write(o->subfd, fakesub, 96);
}
while (1) {
seclen = burn_sector_length_read(d, o);
for (i = 0; i < page.sectors; i++) {
burn_packet_process(d, page.data + seclen * i, o);
d->track_end--;
drive_lba++;
}
if ((d->cancel) || (drive_lba == LAST_SESSION_END(d))) {
d->busy = BURN_DRIVE_IDLE;
if (!d->cancel)
d->toc->complete = 1;
return;
}
/* XXX: removal of this line obviously breaks *
end = burn_track_end(d, d->currsession, d->currtrack); */
if (drive_lba == end) {
d->currtrack++;
if (d->currtrack >
d->toc->session[d->currsession].lasttrack) {
d->currsession++;
/* session switch to d->currsession */
/* skipping a lead out */
drive_lba = CURRENT_SESSION_START(d);
/* XXX more of the same
end = burn_track_end(d, d->currsession,
d->currtrack);
*/
}
}
page.sectors = 0;
page.bytes = 0;
maxsects = BUFFER_SIZE / seclen;
finish = end - drive_lba;
d->track_end = finish;
page.sectors = (finish < maxsects) ? finish : maxsects;
printf("reading %d sectors from %d\n", page.sectors,
drive_lba);
/* >>> ts A61009 : ensure page.sectors >= 0 before calling */
/* >>> ts B21123 : Would now be d->read_cd() with
with sectype = 0 , mainch = 0xf8 */
d->r ead_sectors(d, drive_lba, page.sectors, o, &page);
printf("Read %d\n", page.sectors);
}
#endif
}
int burn_sector_length_read(struct burn_drive *d,
const struct burn_read_opts *o)
{
int dlen = 2352;
int data;
/*XXX how do we handle this crap now?*/
/* data = d->toc->track[d->currtrack].toc_entry->control & 4;*/
data = 1;
if (o->report_recovered_errors)
dlen += 294;
if ((o->subcodes_data) && data)
dlen += 96;
if ((o->subcodes_audio) && !data)
dlen += 96;
return dlen;
}
static int bitcount(unsigned char *data, int n)
{
int i, j, count = 0;
unsigned char tem;
for (i = 0; i < n; i++) {
tem = data[i];
for (j = 0; j < 8; j++) {
count += tem & 1;
tem >>= 1;
}
}
return count;
}
void burn_packet_process(struct burn_drive *d, unsigned char *data,
const struct burn_read_opts *o)
{
unsigned char sub[96];
int ptr = 2352, i, j, code, fb;
int audio = 1;
#ifndef Libburn_no_crc_C
unsigned short crc;
#endif
if (o->c2errors) {
fb = bitcount(data + ptr, 294);
if (fb) {
/* bitcount(data + ptr, 294) damaged bits */;
}
ptr += 294;
}
/*
if (d->toc->track[d->currtrack].mode == BURN_MODE_UNINITIALIZED) {
if ((d->toc->track[d->currtrack].toc_entry->control & 4) == 0)
d->toc->track[d->currtrack].mode = BURN_MODE_AUDIO;
else
switch (data[15]) {
case 0:
d->toc->track[d->currtrack].mode = BURN_MODE0;
break;
case 1:
d->toc->track[d->currtrack].mode = BURN_MODE1;
break;
case 2:
d->toc->track[d->currtrack].mode =
BURN_MODE2_FORMLESS;
break;
}
}
*/
if ((audio && o->subcodes_audio)
|| (!audio && o->subcodes_data)) {
memset(sub, 0, sizeof(sub));
for (i = 0; i < 12; i++) {
for (j = 0; j < 8; j++) {
for (code = 0; code < 8; code++) {
sub[code * 12 + i] <<= 1;
if (data[ptr + j + i * 8] &
(1 << (7 - code)))
sub[code * 12 + i]++;
}
}
}
#ifndef Libburn_no_crc_C
crc = (*(sub + 22) << 8) + *(sub + 23);
if (crc != crc_ccitt(sub + 12, 10)) {
/*
burn_print(1, "sending error on %s %s\n",
d->idata->vendor, d->idata->product);
e = burn_error();
e->drive = d;
burn_print(1, "crc mismatch in Q\n");
*/;
}
#endif
/* else process_q(d, sub + 12); */
/*
if (o->subfd != -1) write(o->subfd, sub, 96); */
}
/*
if ((d->track_end <= 150)
&& (drive_lba + 150 < CURRENT_SESSION_END(d))
&& (TOC_ENTRY(d->toc, d->currtrack).control == 4)
&& (TOC_ENTRY(d->toc, d->currtrack + 1).control == 0)) {
burn_print(12, "pregap : %d\n", d->track_end);
write(o->binfd, zeros, 2352);
#warning XXX WHERE ARE MY SUBCODES
} else
*//* write(o->datafd, data, 2352); */
}
/* so yeah, when you uncomment these, make them write zeros insted of crap
static void write_empty_sector(int fd)
{
static char sec[2352], initialized = 0;
if (!initialized) {
memset(sec, 0, 2352);
initialized = 1;
}
burn_print(1, "writing an 'empty' sector\n");
write(fd, sec, 2352);
}
static void write_empty_subcode(int fd)
{
char sub[96];
write(fd, sub, 96);
}
static void flipq(unsigned char *sub)
{
*(sub + 12 + 10) = ~*(sub + 12 + 10);
*(sub + 12 + 11) = ~*(sub + 12 + 11);
}
*/
/** @param flag bit1= be silent on failure
bit5= report failure with severity DEBUG
*/
static int burn_stdio_seek(int fd, off_t byte_address, struct burn_drive *d,
int flag)
{
char msg[80];
if (lseek(fd, byte_address, SEEK_SET) != -1)
return 1;
if (!(flag & 2)) {
sprintf(msg, "Cannot address start byte %.f",
(double) byte_address);
libdax_msgs_submit(libdax_messenger,
d->global_index, 0x00020147,
(flag & 32) ?
LIBDAX_MSGS_SEV_DEBUG : LIBDAX_MSGS_SEV_SORRY,
LIBDAX_MSGS_PRIO_HIGH, msg, errno, 0);
}
return 0;
}
/* ts A70904 */
/** @param flag bit0= be silent on data shortage
bit5= report data shortage with severity DEBUG
*/
int burn_stdio_read(int fd, char *buf, int bufsize, struct burn_drive *d,
int flag)
{
int todo, count = 0;
for(todo = bufsize; todo > 0; ) {
count = read(fd, buf + (bufsize - todo), todo);
if(count <= 0)
break;
todo -= count;
}
if(todo > 0 && !(flag & 1)) {
libdax_msgs_submit(libdax_messenger, d->global_index,
0x0002014a,
(flag & 32) ?
LIBDAX_MSGS_SEV_DEBUG : LIBDAX_MSGS_SEV_SORRY,
LIBDAX_MSGS_PRIO_HIGH,
"Cannot read desired amount of data", errno, 0);
}
if (count < 0)
return -1;
return (bufsize - todo);
}
/* With DVD and BD media, the minimum ECC entity is read instead of single
blocks.
@param flag see burn_read_data() in libburn.h
*/
static int retry_mmc_read(struct burn_drive *d, int chunksize, int sose_mem,
int start, char **wpt, off_t *data_count,
int flag)
{
int i, err, todo;
int retry_at, retry_size;
retry_at = start;
retry_size = chunksize;
todo = chunksize;
retry_size = 16; /* DVD ECC block size */
if (d->current_is_cd_profile) {
retry_size = 1; /* CD block size */
} else if (d->current_profile >= 0x40 && d->current_profile <= 0x43) {
retry_size = 32; /* BD cluster size */
}
for (i = 0; todo > 0; i++) {
if (flag & 2)
d->silent_on_scsi_error = 1;
else if (flag & 32)
d->silent_on_scsi_error = 3;
retry_at = start + i * retry_size;
if (retry_size > todo)
retry_size = todo;
err = d->read_10(d, retry_at, retry_size, d->buffer);
if (flag & (2 | 32))
d->silent_on_scsi_error = sose_mem;
if (err == BE_CANCELLED)
return 0;
memcpy(*wpt, d->buffer->data, retry_size * 2048);
*wpt += retry_size * 2048;
*data_count += retry_size * 2048;
todo -= retry_size;
}
return 1;
}
/* @param flag see burn_read_data() in libburn.h
*/
static int retry_stdio_read(struct burn_drive *d, int fd, int chunksize,
int start, char **wpt, off_t *data_count,
int flag)
{
int i, ret, to_read, todo;
ret = burn_stdio_seek(fd, ((off_t) start) * 2048, d, flag & 2);
if (ret <= 0)
return ret;
todo = chunksize * 2048;
for (i = 0; todo > 0; i += 2048) {
to_read = todo;
if (to_read > 2048)
to_read = 2048;
ret = burn_stdio_read(fd, (char *) d->buffer->data, to_read,
d, 1);
if (ret <= 0)
return 0;
memcpy(*wpt, d->buffer->data, to_read);
*wpt += to_read;
*data_count += to_read;
todo -= to_read;
}
return 1;
}
/* ts A70812 : API function */
int burn_read_data(struct burn_drive *d, off_t byte_address,
char data[], off_t data_size, off_t *data_count, int flag)
{
int alignment = 2048, start, upto, chunksize = 1, err, cpy_size;
int sose_mem = 0, fd = -1, ret;
char msg[81], *wpt;
struct buffer *buf = NULL, *buffer_mem = d->buffer;
/*
#define Libburn_read_data_adr_logginG 1
*/
#ifdef Libburn_read_data_adr_logginG
static FILE *log_fp= NULL;
if(log_fp == NULL)
log_fp = fopen("/tmp/burn_read_data_log", "a");
if(log_fp!=NULL)
fprintf(log_fp, "%d\n", (int) (byte_address / 2048));
#endif /* Libburn_read_data_logginG */
BURN_ALLOC_MEM(buf, struct buffer, 1);
*data_count = 0;
sose_mem = d->silent_on_scsi_error;
if (d->released) {
libdax_msgs_submit(libdax_messenger,
d->global_index, 0x00020142,
LIBDAX_MSGS_SEV_FATAL, LIBDAX_MSGS_PRIO_HIGH,
"Drive is not grabbed on random access read", 0, 0);
{ret = 0; goto ex;}
}
if (d->drive_role == 0) {
libdax_msgs_submit(libdax_messenger, d->global_index,
0x00020146,
LIBDAX_MSGS_SEV_FATAL, LIBDAX_MSGS_PRIO_HIGH,
"Drive is a virtual placeholder (null-drive)", 0, 0);
{ret = 0; goto ex;}
} else if (d->drive_role == 3) {
libdax_msgs_submit(libdax_messenger, d->global_index,
0x00020151,
LIBDAX_MSGS_SEV_FAILURE, LIBDAX_MSGS_PRIO_HIGH,
"Read attempt on write-only drive", 0, 0);
{ret = 0; goto ex;}
}
if ((byte_address % alignment) != 0) {
sprintf(msg,
"Read start address not properly aligned (%d bytes)",
alignment);
libdax_msgs_submit(libdax_messenger, d->global_index,
0x00020143,
LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
msg, 0, 0);
{ret = 0; goto ex;}
}
if (d->media_read_capacity != 0x7fffffff && byte_address >=
((off_t) d->media_read_capacity + (off_t) 1) * (off_t) 2048) {
if (!(flag & 2)) {
sprintf(msg,
"Read start address %ds larger than number of readable blocks %d",
(int) (byte_address / 2048 + !!(byte_address % 2048)),
d->media_read_capacity + 1);
libdax_msgs_submit(libdax_messenger, d->global_index,
0x00020172, (flag & 32) ?
LIBDAX_MSGS_SEV_DEBUG : LIBDAX_MSGS_SEV_SORRY,
LIBDAX_MSGS_PRIO_HIGH, msg, 0, 0);
}
{ret = 0; goto ex;}
}
if (d->busy != BURN_DRIVE_IDLE) {
libdax_msgs_submit(libdax_messenger,
d->global_index, 0x00020145,
LIBDAX_MSGS_SEV_FATAL, LIBDAX_MSGS_PRIO_HIGH,
"Drive is busy on attempt to read data", 0, 0);
{ret = 0; goto ex;}
}
if (d->drive_role != 1) {
/* <<< We need _LARGEFILE64_SOURCE defined by the build system.
*/
#ifndef O_LARGEFILE
#define O_LARGEFILE 0
#endif
fd = d->stdio_fd;
if (fd < 0)
d->stdio_fd = fd =
open(d->devname,
O_RDONLY | O_LARGEFILE | O_BINARY);
if (fd == -1) {
if (errno == EACCES && (flag & 2)) {
if (!(flag & 8))
libdax_msgs_submit(libdax_messenger,
d->global_index, 0x00020183,
LIBDAX_MSGS_SEV_WARNING,
LIBDAX_MSGS_PRIO_HIGH,
"Failed to open device (a pseudo-drive) for reading",
errno, 0);
} else if (errno != ENOENT || !(flag & 2))
libdax_msgs_submit(libdax_messenger,
d->global_index, 0x00020005,
(flag & 32) && errno == ENOENT ?
LIBDAX_MSGS_SEV_DEBUG :
LIBDAX_MSGS_SEV_SORRY,
LIBDAX_MSGS_PRIO_HIGH,
"Failed to open device (a pseudo-drive) for reading",
errno, 0);
ret = 0;
if (errno == EACCES && (flag & 8))
ret= -2;
goto ex;
}
ret = burn_stdio_seek(fd, byte_address, d, flag & (2 | 32));
if (ret <= 0)
goto ex;
}
d->busy = BURN_DRIVE_READING_SYNC;
d->buffer = buf;
start = byte_address / 2048;
upto = start + data_size / 2048;
if (data_size % 2048)
upto++;
wpt = data;
for (; start < upto; start += chunksize) {
chunksize = upto - start;
if (chunksize > (BUFFER_SIZE / 2048)) {
chunksize = (BUFFER_SIZE / 2048);
cpy_size = BUFFER_SIZE;
} else
cpy_size = data_size - *data_count;
if (flag & 2)
d->silent_on_scsi_error = 1;
else if (flag & 32)
d->silent_on_scsi_error = 3;
if (flag & 16) {
d->had_particular_error &= ~1;
if (!d->silent_on_scsi_error)
d->silent_on_scsi_error = 2;
}
if (d->drive_role == 1) {
err = d->read_10(d, start, chunksize, d->buffer);
} else {
ret = burn_stdio_read(fd, (char *) d->buffer->data,
cpy_size, d,
(flag & 32) | !!(flag & 2));
err = 0;
if (ret <= 0)
err = BE_CANCELLED;
}
if (flag & (2 | 16 | 32))
d->silent_on_scsi_error = sose_mem;
if (err == BE_CANCELLED) {
if ((flag & 16) && (d->had_particular_error & 1))
{ret = -3; goto ex;}
/* Retry: with CD read by single blocks
with other media: retry in full chunks
*/
if(flag & 4)
goto bad_read;
if (d->drive_role == 1) {
ret = retry_mmc_read(d, chunksize, sose_mem,
start, &wpt, data_count, flag);
} else {
ret = retry_stdio_read(d, fd, chunksize,
start, &wpt, data_count, flag);
}
if (ret <= 0)
goto bad_read;
} else {
memcpy(wpt, d->buffer->data, cpy_size);
wpt += cpy_size;
*data_count += cpy_size;
}
}
ret = 1;
ex:;
BURN_FREE_MEM(buf);
d->buffer = buffer_mem;
d->busy = BURN_DRIVE_IDLE;
return ret;
bad_read:;
if (!(flag & 2))
libdax_msgs_submit(libdax_messenger, d->global_index,
0x00020000,
LIBDAX_MSGS_SEV_DEBUG, LIBDAX_MSGS_PRIO_HIGH,
"burn_read_data() returns 0", 0, 0);
ret = 0; goto ex;
}
/* ts B21119 : API function*/
int burn_read_audio(struct burn_drive *d, int sector_no,
char data[], off_t data_size, off_t *data_count, int flag)
{
int alignment = 2352, start, upto, chunksize = 1, err, cpy_size, i;
int sose_mem = 0, ret;
char msg[81], *wpt;
struct buffer *buf = NULL, *buffer_mem = d->buffer;
BURN_ALLOC_MEM(buf, struct buffer, 1);
*data_count = 0;
sose_mem = d->silent_on_scsi_error;
if (d->released) {
libdax_msgs_submit(libdax_messenger,
d->global_index, 0x00020142,
LIBDAX_MSGS_SEV_FATAL, LIBDAX_MSGS_PRIO_HIGH,
"Drive is not grabbed on random access read", 0, 0);
{ret = 0; goto ex;}
}
if (d->drive_role != 1) {
libdax_msgs_submit(libdax_messenger, d->global_index,
0x00020146,
LIBDAX_MSGS_SEV_FATAL, LIBDAX_MSGS_PRIO_HIGH,
"Drive is a virtual placeholder (stdio-drive or null-drive)",
0, 0);
{ret = 0; goto ex;}
}
if ((data_size % alignment) != 0) {
sprintf(msg,
"Audio read size not properly aligned (%d bytes)",
alignment);
libdax_msgs_submit(libdax_messenger, d->global_index,
0x0002019d,
LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
msg, 0, 0);
{ret = 0; goto ex;}
}
if (d->busy != BURN_DRIVE_IDLE) {
libdax_msgs_submit(libdax_messenger,
d->global_index, 0x00020145,
LIBDAX_MSGS_SEV_FATAL, LIBDAX_MSGS_PRIO_HIGH,
"Drive is busy on attempt to read audio", 0, 0);
{ret = 0; goto ex;}
}
d->busy = BURN_DRIVE_READING_SYNC;
d->buffer = buf;
start = sector_no;
upto = start + data_size / alignment;
wpt = data;
for (; start < upto; start += chunksize) {
chunksize = upto - start;
if (chunksize > (BUFFER_SIZE / alignment))
chunksize = (BUFFER_SIZE / alignment);
cpy_size = chunksize * alignment;
if (flag & 2)
d->silent_on_scsi_error = 1;
else if (flag & 32)
d->silent_on_scsi_error = 3;
if (flag & 16) {
d->had_particular_error &= ~1;
if (!d->silent_on_scsi_error)
d->silent_on_scsi_error = 2;
}
err = d->read_cd(d, start, chunksize, 1, 0x10, NULL, d->buffer,
(flag & 8) >> 3);
if (flag & (2 | 16 | 32))
d->silent_on_scsi_error = sose_mem;
if (err == BE_CANCELLED) {
if ((flag & 16) && (d->had_particular_error & 1))
{ret = -3; goto ex;}
if(!(flag & 4))
for (i = 0; i < chunksize - 1; i++) {
if (flag & 2)
d->silent_on_scsi_error = 1;
else if (flag & 32)
d->silent_on_scsi_error = 3;
err = d->read_cd(d, start + i, 1, 1, 0x10,
NULL, d->buffer, (flag & 8) >> 3);
if (flag & (2 | 32))
d->silent_on_scsi_error = sose_mem;
if (err == BE_CANCELLED)
break;
memcpy(wpt, d->buffer->data, alignment);
wpt += alignment;
*data_count += alignment;
}
ret = 0; goto ex;
}
memcpy(wpt, d->buffer->data, cpy_size);
wpt += cpy_size;
*data_count += cpy_size;
}
ret = 1;
ex:
BURN_FREE_MEM(buf);
d->buffer = buffer_mem;
d->busy = BURN_DRIVE_IDLE;
return ret;
}
#ifdef Libburn_develop_quality_scaN
/* B21108 ts */
int burn_nec_optiarc_rep_err_rate(struct burn_drive *d,
int start_lba, int rate_period, int flag)
{
int ret, lba = 0, error_rate1 = 0, error_rate2 = 0, enabled = 0, dret;
/* Sub Operation Code 1 : Enable Error Rate reporting function */
ret = mmc_nec_optiarc_f3(d, 1, start_lba, rate_period,
&lba, &error_rate1, &error_rate2);
if (ret <= 0)
goto ex;
enabled = 1;
/* >>> Sub Operation Code 2 : Seek to starting address
start_lba , rate_period
*/;
/* >>> Loop with Sub Operation Code 3 : Send Error Rate information
reply: 4-byte LBA , 2-byte C1/PIE , 2-byte C2/PIF
*/;
ret = 1;
ex:;
if (enabled) {
/* Code F : Disable Error Rate reporting function */
dret = mmc_nec_optiarc_f3(d, 0xf, 0, 0,
&lba, &error_rate1, &error_rate2);
if (dret < ret)
ret = dret;
}
return ret;
}
#endif /* Libburn_develop_quality_scaN */
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