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blkdev_cdimage.cpp
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blkdev_cdimage.cpp
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/*
* UAE
*
* CD image file support
*
* - iso (2048/2352 block size)
* - cue/bin, cue/bin/wav, cue/bin/mp3
* - ccd/img and ccd/img/sub
*
* Copyright 2010 Toni Wilen
*
*/
#include "sysconfig.h"
#include "sysdeps.h"
#include <sys/timeb.h>
#include "options.h"
#include "blkdev.h"
#include "zfile.h"
#include "gui.h"
#include "fsdb.h"
#include "threaddep/thread.h"
#include "scsidev.h"
#include "mp3decoder.h"
#include "cda_play.h"
#include "memory.h"
#ifdef RETROPLATFORM
#include "rp.h"
#endif
#define FLAC__NO_DLL
#include "FLAC/stream_decoder.h"
#define scsi_log write_log
#define CDDA_BUFFERS 6
enum audenc { AUDENC_NONE, AUDENC_PCM, AUDENC_MP3, AUDENC_FLAC };
struct cdtoc
{
struct zfile *handle;
int offset;
uae_u8 *data;
struct zfile *subhandle;
int suboffset;
uae_u8 *subdata;
int filesize;
TCHAR *fname;
int address;
uae_u8 adr, ctrl;
int track;
int size;
int skipsize; // bytes to skip after each block
audenc enctype;
int writeoffset;
int subcode;
};
struct cdunit {
bool enabled;
bool open;
uae_u8 buffer[2352];
struct cdtoc toc[102];
int tracks;
uae_u64 cdsize;
int blocksize;
int cdda_play_state;
int cdda_play;
int cdda_paused;
int cdda_volume[2];
int cdda_scan;
int cd_last_pos;
int cdda_start, cdda_end;
play_subchannel_callback cdda_subfunc;
play_status_callback cdda_statusfunc;
int cdda_delay, cdda_delay_frames;
int imagechange;
TCHAR newfile[MAX_DPATH];
uae_sem_t sub_sem;
struct device_info di;
};
static struct cdunit cdunits[MAX_TOTAL_SCSI_DEVICES];
static int bus_open;
static volatile int cdimage_unpack_thread, cdimage_unpack_active;
static smp_comm_pipe unpack_pipe;
static struct cdunit *unitisopen (int unitnum)
{
struct cdunit *cdu = &cdunits[unitnum];
if (cdu->open)
return cdu;
return NULL;
}
static struct cdtoc *findtoc (struct cdunit *cdu, int *sectorp)
{
int i;
int sector;
if (*sectorp < 0)
return NULL;
sector = *sectorp;
for (i = 0; i <= cdu->tracks; i++) {
struct cdtoc *t = &cdu->toc[i];
if (t->address > sector) {
if (i == 0) {
*sectorp = 0;
return t;
}
t--;
sector -= t->address;
*sectorp = sector;
return t;
}
}
return NULL;
}
// WOHOO, library that supports virtual file access functions. Perfect!
static void flac_metadata_callback (const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
{
struct cdtoc *t = (struct cdtoc*)client_data;
if (t->data)
return;
if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO) {
t->filesize = metadata->data.stream_info.total_samples * (metadata->data.stream_info.bits_per_sample / 8) * metadata->data.stream_info.channels;
}
}
static void flac_error_callback (const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
{
return;
}
static FLAC__StreamDecoderWriteStatus flac_write_callback (const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
{
struct cdtoc *t = (struct cdtoc*)client_data;
uae_u16 *p = (uae_u16*)(t->data + t->writeoffset);
int size = 4;
for (int i = 0; i < frame->header.blocksize && t->writeoffset < t->filesize - size; i++, t->writeoffset += size) {
*p++ = (FLAC__int16)buffer[0][i];
*p++ = (FLAC__int16)buffer[1][i];
}
return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
}
static FLAC__StreamDecoderReadStatus file_read_callback (const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
{
struct cdtoc *t = (struct cdtoc*)client_data;
if (zfile_ftell (t->handle) >= zfile_size (t->handle))
return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
return zfile_fread (buffer, *bytes, 1, t->handle) ? FLAC__STREAM_DECODER_READ_STATUS_CONTINUE : FLAC__STREAM_DECODER_READ_STATUS_ABORT;
}
static FLAC__StreamDecoderSeekStatus file_seek_callback (const FLAC__StreamDecoder *decoder, FLAC__uint64 absolute_byte_offset, void *client_data)
{
struct cdtoc *t = (struct cdtoc*)client_data;
zfile_fseek (t->handle, absolute_byte_offset, SEEK_SET);
return FLAC__STREAM_DECODER_SEEK_STATUS_OK;
}
static FLAC__StreamDecoderTellStatus file_tell_callback (const FLAC__StreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data)
{
struct cdtoc *t = (struct cdtoc*)client_data;
*absolute_byte_offset = zfile_ftell (t->handle);
return FLAC__STREAM_DECODER_TELL_STATUS_OK;
}
static FLAC__StreamDecoderLengthStatus file_len_callback (const FLAC__StreamDecoder *decoder, FLAC__uint64 *stream_length, void *client_data)
{
struct cdtoc *t = (struct cdtoc*)client_data;
*stream_length = zfile_size (t->handle);
return FLAC__STREAM_DECODER_LENGTH_STATUS_OK;
}
static FLAC__bool file_eof_callback (const FLAC__StreamDecoder *decoder, void *client_data)
{
struct cdtoc *t = (struct cdtoc*)client_data;
return zfile_ftell (t->handle) >= zfile_size (t->handle);
}
static void flac_get_size (struct cdtoc *t)
{
FLAC__StreamDecoder *decoder = FLAC__stream_decoder_new ();
if (decoder) {
FLAC__stream_decoder_set_md5_checking (decoder, false);
int init_status = FLAC__stream_decoder_init_stream (decoder,
&file_read_callback, &file_seek_callback, &file_tell_callback,
&file_len_callback, &file_eof_callback,
&flac_write_callback, &flac_metadata_callback, &flac_error_callback, t);
FLAC__stream_decoder_process_until_end_of_metadata (decoder);
FLAC__stream_decoder_delete (decoder);
}
}
static uae_u8 *flac_get_data (struct cdtoc *t)
{
write_log (L"FLAC: unpacking '%s'..\n", zfile_getname (t->handle));
t->writeoffset = 0;
FLAC__StreamDecoder *decoder = FLAC__stream_decoder_new ();
if (decoder) {
FLAC__stream_decoder_set_md5_checking (decoder, false);
int init_status = FLAC__stream_decoder_init_stream (decoder,
&file_read_callback, &file_seek_callback, &file_tell_callback,
&file_len_callback, &file_eof_callback,
&flac_write_callback, &flac_metadata_callback, &flac_error_callback, t);
FLAC__stream_decoder_process_until_end_of_stream (decoder);
FLAC__stream_decoder_delete (decoder);
write_log (L"FLAC: %s unpacked\n", zfile_getname (t->handle));
}
return t->data;
}
static void sub_to_interleaved (const uae_u8 *s, uae_u8 *d)
{
for (int i = 0; i < 8 * 12; i ++) {
int dmask = 0x80;
int smask = 1 << (7 - (i & 7));
(*d) = 0;
for (int j = 0; j < 8; j++) {
(*d) |= (s[(i / 8) + j * 12] & smask) ? dmask : 0;
dmask >>= 1;
}
d++;
}
}
static void sub_to_deinterleaved (const uae_u8 *s, uae_u8 *d)
{
for (int i = 0; i < 8 * 12; i ++) {
int dmask = 0x80;
int smask = 1 << (7 - (i / 12));
(*d) = 0;
for (int j = 0; j < 8; j++) {
(*d) |= (s[(i % 12) * 8 + j] & smask) ? dmask : 0;
dmask >>= 1;
}
d++;
}
}
static int getsub_deinterleaved (uae_u8 *dst, struct cdunit *cdu, struct cdtoc *t, int sector)
{
int ret = 0;
uae_sem_wait (&cdu->sub_sem);
if (t->subcode) {
if (t->subhandle) {
int offset = 0;
int totalsize = SUB_CHANNEL_SIZE;
if (t->skipsize) {
totalsize += t->size;
offset = t->size;
}
zfile_fseek (t->subhandle, sector * totalsize + t->suboffset + offset, SEEK_SET);
if (zfile_fread (dst, SUB_CHANNEL_SIZE, 1, t->subhandle) > 0)
ret = t->subcode;
} else {
memcpy (dst, t->subdata + sector * SUB_CHANNEL_SIZE + t->suboffset, SUB_CHANNEL_SIZE);
ret = t->subcode;
}
}
if (!ret) {
memset (dst, 0, SUB_CHANNEL_SIZE);
// regenerate Q-subchannel
uae_u8 *s = dst + 12;
s[0] = (t->ctrl << 4) | (t->adr << 0);
s[1] = tobcd (t - &cdu->toc[0] + 1);
s[2] = tobcd (1);
int msf = lsn2msf (sector);
tolongbcd (s + 7, msf);
msf = lsn2msf (sector - t->address - 150);
tolongbcd (s + 3, msf);
ret = 2;
}
if (ret == 1) {
uae_u8 tmp[SUB_CHANNEL_SIZE];
memcpy (tmp, dst, SUB_CHANNEL_SIZE);
sub_to_deinterleaved (tmp, dst);
ret = 2;
}
uae_sem_post (&cdu->sub_sem);
return ret;
}
static void dosub (struct cdunit *cdu, uae_u8 *subbuf)
{
uae_u8 subbuf2[SUB_CHANNEL_SIZE];
if (!cdu->cdda_subfunc)
return;
if (!subbuf) {
memset (subbuf2, 0, sizeof subbuf2);
cdu->cdda_subfunc (subbuf2, 1);
return;
}
sub_to_interleaved (subbuf, subbuf2);
cdu->cdda_subfunc (subbuf2, 1);
}
static int setstate (struct cdunit *cdu, int state)
{
cdu->cdda_play_state = state;
if (cdu->cdda_statusfunc)
return cdu->cdda_statusfunc (cdu->cdda_play_state);
return 0;
}
static void *cdda_unpack_func (void *v)
{
cdimage_unpack_thread = 1;
mp3decoder *mp3dec = NULL;
for (;;) {
uae_u32 cduidx = read_comm_pipe_u32_blocking (&unpack_pipe);
if (cdimage_unpack_thread == 0)
break;
uae_u32 tocidx = read_comm_pipe_u32_blocking (&unpack_pipe);
struct cdunit *cdu = &cdunits[cduidx];
struct cdtoc *t = &cdu->toc[tocidx];
if (t->handle) {
// force unpack if handle points to delayed zipped file
uae_s64 pos = zfile_ftell (t->handle);
zfile_fseek (t->handle, -1, SEEK_END);
uae_u8 b;
zfile_fread (&b, 1, 1, t->handle);
zfile_fseek (t->handle, pos, SEEK_SET);
if (!t->data && (t->enctype == AUDENC_MP3 || t->enctype == AUDENC_FLAC)) {
t->data = xcalloc (uae_u8, t->filesize + 2352);
cdimage_unpack_active = 1;
if (t->data) {
if (t->enctype == AUDENC_MP3) {
if (!mp3dec) {
try {
mp3dec = new mp3decoder();
} catch (exception) { };
}
if (mp3dec)
t->data = mp3dec->get (t->handle, t->data, t->filesize);
} else if (t->enctype == AUDENC_FLAC) {
flac_get_data (t);
}
}
}
}
cdimage_unpack_active = 2;
}
delete mp3dec;
cdimage_unpack_thread = -1;
return 0;
}
static void *cdda_play_func (void *v)
{
int cdda_pos;
int num_sectors = CDDA_BUFFERS;
int quit = 0;
int bufnum;
int bufon[2];
int oldplay;
int idleframes;
bool foundsub;
struct cdunit *cdu = (struct cdunit*)v;
while (cdu->cdda_play == 0)
Sleep (10);
oldplay = -1;
bufon[0] = bufon[1] = 0;
bufnum = 0;
cda_audio *cda = new cda_audio (num_sectors);
while (cdu->cdda_play > 0) {
if (oldplay != cdu->cdda_play) {
struct cdtoc *t;
int sector, diff;
struct _timeb tb1, tb2;
idleframes = 0;
foundsub = false;
_ftime (&tb1);
cdda_pos = cdu->cdda_start;
oldplay = cdu->cdda_play;
sector = cdu->cd_last_pos = cdda_pos;
t = findtoc (cdu, §or);
if (!t) {
write_log (L"IMAGE CDDA: illegal sector number %d\n", cdu->cdda_start);
setstate (cdu, AUDIO_STATUS_PLAY_ERROR);
} else {
write_log (L"IMAGE CDDA: playing from %d to %d, track %d ('%s', offset %d, secoffset %d)\n",
cdu->cdda_start, cdu->cdda_end, t->track, t->fname, t->offset, sector);
// do this even if audio is not compressed, t->handle also could be
// compressed and we want to unpack it in background too
while (cdimage_unpack_active == 1)
Sleep (10);
cdimage_unpack_active = 0;
write_comm_pipe_u32 (&unpack_pipe, cdu - &cdunits[0], 0);
write_comm_pipe_u32 (&unpack_pipe, t - &cdu->toc[0], 1);
while (cdimage_unpack_active == 0)
Sleep (10);
}
idleframes = cdu->cdda_delay_frames;
while (cdu->cdda_paused && cdu->cdda_play > 0) {
Sleep (10);
idleframes = -1;
}
if (cdu->cdda_scan == 0) {
// find possible P-subchannel=1 and fudge starting point so that
// buggy CD32/CDTV software CD+G handling does not miss any frames
bool seenindex = false;
for (sector = cdda_pos - 200; sector < cdda_pos; sector++) {
int sec = sector;
t = findtoc (cdu, &sec);
if (t) {
uae_u8 subbuf[SUB_CHANNEL_SIZE];
getsub_deinterleaved (subbuf, cdu, t, sector);
if (seenindex) {
for (int i = 2 * SUB_ENTRY_SIZE; i < SUB_CHANNEL_SIZE; i++) {
if (subbuf[i]) { // non-zero R-W subchannels
int diff = cdda_pos - sector + 2;
write_log (L"-> CD+G start pos fudge -> %d (%d)\n", sector, -diff);
idleframes -= diff;
cdda_pos = sector;
break;
}
}
} else if (subbuf[0] == 0xff) { // P == 1?
seenindex = true;
}
}
}
}
cdda_pos -= idleframes;
_ftime (&tb2);
diff = (tb2.time * (uae_s64)1000 + tb2.millitm) - (tb1.time * (uae_s64)1000 + tb1.millitm);
diff -= cdu->cdda_delay;
if (idleframes >= 0 && diff < 0 && cdu->cdda_play > 0)
Sleep (-diff);
setstate (cdu, AUDIO_STATUS_IN_PROGRESS);
}
cda->wait(bufnum);
bufon[bufnum] = 0;
if (!cdu->cdda_play)
goto end;
if (idleframes <= 0 && !isaudiotrack (&cdu->di.toc, cdda_pos)) {
setstate (cdu, AUDIO_STATUS_PLAY_ERROR);
goto end; // data track?
}
if ((cdda_pos < cdu->cdda_end || cdu->cdda_end == 0xffffffff) && !cdu->cdda_paused && cdu->cdda_play > 0) {
struct cdtoc *t;
int sector, cnt;
int dofinish = 0;
gui_flicker_led (LED_CD, cdu->di.unitnum - 1, LED_CD_AUDIO);
memset (cda->buffers[bufnum], 0, num_sectors * 2352);
for (cnt = 0; cnt < num_sectors; cnt++) {
uae_u8 *dst = cda->buffers[bufnum] + cnt * 2352;
uae_u8 subbuf[SUB_CHANNEL_SIZE];
sector = cdda_pos;
memset (subbuf, 0, SUB_CHANNEL_SIZE);
t = findtoc (cdu, §or);
if (t) {
if (t->handle && !(t->ctrl & 4)) {
int totalsize = t->size + t->skipsize;
if ((t->enctype == AUDENC_MP3 || t->enctype == AUDENC_FLAC) && t->data) {
if (t->filesize >= sector * totalsize + t->offset + t->size)
memcpy (dst, t->data + sector * totalsize + t->offset, t->size);
} else if (t->enctype == AUDENC_PCM) {
if (sector * totalsize + t->offset + totalsize < t->filesize) {
zfile_fseek (t->handle, sector * totalsize + t->offset, SEEK_SET);
zfile_fread (dst, t->size, 1, t->handle);
}
}
}
getsub_deinterleaved (subbuf, cdu, t, cdda_pos);
}
if (idleframes > 0) {
idleframes--;
memset (dst, 0, 2352);
memset (subbuf, 0, SUB_CHANNEL_SIZE);
}
if (cdda_pos < cdu->cdda_start && cdu->cdda_scan == 0)
memset (dst, 0, 2352);
dosub (cdu, subbuf);
if (cdu->cdda_scan) {
cdda_pos += cdu->cdda_scan;
if (cdda_pos < 0)
cdda_pos = 0;
} else {
cdda_pos++;
}
if (cdda_pos - num_sectors < cdu->cdda_end && cdda_pos >= cdu->cdda_end)
dofinish = 1;
}
if (idleframes <= 0)
cdu->cd_last_pos = cdda_pos;
bufon[bufnum] = 1;
cda->setvolume (currprefs.sound_volume, cdu->cdda_volume[0], cdu->cdda_volume[1]);
if (!cda->play (bufnum)) {
setstate (cdu, AUDIO_STATUS_PLAY_ERROR);
goto end;
}
if (dofinish) {
setstate (cdu, AUDIO_STATUS_PLAY_COMPLETE);
cdu->cdda_play = -1;
cdda_pos = cdu->cdda_end + 1;
}
}
if (bufon[0] == 0 && bufon[1] == 0) {
while (cdu->cdda_paused && cdu->cdda_play > 0)
Sleep (10);
}
bufnum = 1 - bufnum;
}
end:
cda->wait (0);
cda->wait (1);
while (cdimage_unpack_active == 1)
Sleep (10);
delete cda;
cdu->cdda_play = 0;
write_log (L"IMAGE CDDA: thread killed\n");
return NULL;
}
static void cdda_stop (struct cdunit *cdu)
{
if (cdu->cdda_play != 0) {
cdu->cdda_play = -1;
while (cdu->cdda_play) {
Sleep (10);
}
}
cdu->cdda_paused = 0;
cdu->cdda_play_state = 0;
}
static int command_pause (int unitnum, int paused)
{
struct cdunit *cdu = unitisopen (unitnum);
if (!cdu)
return -1;
int old = cdu->cdda_paused;
cdu->cdda_paused = paused;
return old;
}
static int command_stop (int unitnum)
{
struct cdunit *cdu = unitisopen (unitnum);
if (!cdu)
return 0;
cdda_stop (cdu);
return 1;
}
static int command_play (int unitnum, int startlsn, int endlsn, int scan, play_status_callback statusfunc, play_subchannel_callback subfunc)
{
struct cdunit *cdu = unitisopen (unitnum);
if (!cdu)
return 0;
cdu->cd_last_pos = startlsn;
cdu->cdda_start = startlsn;
cdu->cdda_end = endlsn;
cdu->cdda_subfunc = subfunc;
cdu->cdda_statusfunc = statusfunc;
cdu->cdda_scan = scan > 0 ? 10 : (scan < 0 ? 10 : 0);
cdu->cdda_delay = setstate (cdu, -1);
cdu->cdda_delay_frames = setstate (cdu, -2);
setstate (cdu, AUDIO_STATUS_NOT_SUPPORTED);
if (!isaudiotrack (&cdu->di.toc, startlsn)) {
setstate (cdu, AUDIO_STATUS_PLAY_ERROR);
return 0;
}
if (!cdu->cdda_play)
uae_start_thread (L"cdimage_cdda_play", cdda_play_func, cdu, NULL);
cdu->cdda_play++;
return 1;
}
static int command_qcode (int unitnum, uae_u8 *buf, int sector)
{
struct cdunit *cdu = unitisopen (unitnum);
if (!cdu)
return 0;
uae_u8 subbuf[SUB_CHANNEL_SIZE];
uae_u8 *p;
int trk;
int pos;
int status;
memset (buf, 0, SUBQ_SIZE);
p = buf;
status = cdu->cdda_play_state;
if (cdu->cdda_play > 0 && cdu->cdda_paused)
status = AUDIO_STATUS_PAUSED;
if (sector < 0)
pos = cdu->cd_last_pos;
else
pos = sector;
p[1] = status;
p[3] = 12;
p = buf + 4;
struct cdtoc *td = NULL;
for (trk = 0; trk <= cdu->tracks; trk++) {
td = &cdu->toc[trk];
if (pos < td->address) {
if (trk > 0)
td--;
break;
}
if (pos >= td->address && pos < td[1].address)
break;
}
if (!td)
return 0;
getsub_deinterleaved (subbuf, cdu, td, pos);
memcpy (p, subbuf + 12, 12);
// write_log (L"%6d %02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x\n",
// pos, p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8], p[9], p[10], p[11]);
return 1;
}
static uae_u32 command_volume (int unitnum, uae_u16 volume_left, uae_u16 volume_right)
{
struct cdunit *cdu = unitisopen (unitnum);
if (!cdu)
return -1;
uae_u32 old = (cdu->cdda_volume[1] << 16) | (cdu->cdda_volume[0] << 0);
cdu->cdda_volume[0] = volume_left;
cdu->cdda_volume[1] = volume_right;
return old;
}
extern void encode_l2 (uae_u8 *p, int address);
static int command_rawread (int unitnum, uae_u8 *data, int sector, int size, int sectorsize, uae_u32 extra)
{
int ret = 0;
struct cdunit *cdu = unitisopen (unitnum);
if (!cdu)
return 0;
struct cdtoc *t = findtoc (cdu, §or);
if (!t || t->handle == NULL)
goto end;
cdda_stop (cdu);
if (sectorsize > 0) {
if (sectorsize == 2352 && t->size == 2048) {
// 2048 -> 2352
while (size-- > 0) {
memset (data, 0, 16);
zfile_fseek (t->handle, t->offset + sector * t->size, SEEK_SET);
zfile_fread (data + 16, t->size, 1, t->handle);
encode_l2 (data, sector + 150);
sector++;
data += sectorsize;
}
} else if (sectorsize == 2048 && t->size == 2352) {
// 2352 -> 2048
while (size-- > 0) {
uae_u8 b = 0;
zfile_fseek (t->handle, t->offset + sector * t->size + 15, SEEK_SET);
zfile_fread (&b, 1, 1, t->handle);
if (b == 2) // MODE2?
zfile_fseek (t->handle, t->offset + sector * t->size + 24, SEEK_SET);
zfile_fread (data, sectorsize, 1, t->handle);
sector++;
data += sectorsize;
}
} else if (sectorsize == 2336 && t->size == 2352) {
// 2352 -> 2336
while (size-- > 0) {
uae_u8 b = 0;
zfile_fseek (t->handle, t->offset + sector * t->size + 15, SEEK_SET);
zfile_fread (&b, 1, 1, t->handle);
if (b != 2 && b != 0) // MODE0 or MODE2 only allowed
return 0;
zfile_fread (data, sectorsize, 1, t->handle);
sector++;
data += sectorsize;
}
} else if (sectorsize == t->size) {
// no change
zfile_fseek (t->handle, t->offset + sector * t->size, SEEK_SET);
zfile_fread (data, sectorsize, size, t->handle);
sector += size;
}
cdu->cd_last_pos = sector;
ret = sectorsize * size;
} else {
uae_u8 sectortype = extra >> 16;
uae_u8 cmd9 = extra >> 8;
int sync = (cmd9 >> 7) & 1;
int headercodes = (cmd9 >> 5) & 3;
int userdata = (cmd9 >> 4) & 1;
int edcecc = (cmd9 >> 3) & 1;
int errorfield = (cmd9 >> 1) & 3;
uae_u8 subs = extra & 7;
if (subs != 0 && subs != 1 && subs != 2 && subs != 4) {
ret = -1;
goto end;
}
if (isaudiotrack (&cdu->di.toc, sector)) {
if (sectortype != 0 && sectortype != 1) {
ret = -2;
goto end;
}
if (t->size != 2352) {
ret = -1;
goto end;
}
for (int i = 0; i < size; i++) {
zfile_fseek (t->handle, t->offset + sector * t->size, SEEK_SET);
zfile_fread (data, t->size, 1, t->handle);
uae_u8 *p = data + t->size;
if (subs) {
uae_u8 subdata[SUB_CHANNEL_SIZE];
getsub_deinterleaved (subdata, cdu, t, sector);
if (subs == 4) { // all, de-interleaved
memcpy (p, subdata, SUB_CHANNEL_SIZE);
p += SUB_CHANNEL_SIZE;
} else if (subs == 2) { // q-only
memcpy (p, subdata + SUB_ENTRY_SIZE, SUB_ENTRY_SIZE);
p += SUB_ENTRY_SIZE;
} else if (subs == 1) { // all, interleaved
sub_to_interleaved (subdata, p);
p += SUB_CHANNEL_SIZE;
}
}
ret += p - data;
data = p;
sector++;
}
}
}
end:
return ret;
}
// this only supports 2048 byte sectors
static int command_read (int unitnum, uae_u8 *data, int sector, int size)
{
struct cdunit *cdu = unitisopen (unitnum);
if (!cdu)
return 0;
struct cdtoc *t = findtoc (cdu, §or);
if (!t || t->handle == NULL)
return 0;
cdda_stop (cdu);
if (t->size == 2048) {
zfile_fseek (t->handle, t->offset + sector * t->size, SEEK_SET);
zfile_fread (data, size, 2048, t->handle);
sector += size;
} else {
while (size-- > 0) {
if (t->size == 2352) {
uae_u8 b = 0;
zfile_fseek (t->handle, t->offset + sector * t->size + 15, SEEK_SET);
zfile_fread (&b, 1, 1, t->handle);
if (b == 2) // MODE2?
zfile_fseek (t->handle, t->offset + sector * t->size + 24, SEEK_SET);
} else {
zfile_fseek (t->handle, t->offset + sector * t->size + 16, SEEK_SET);
}
zfile_fread (data, 1, 2048, t->handle);
data += 2048;
sector++;
}
}
cdu->cd_last_pos = sector;
return 1;
}
static int command_toc (int unitnum, struct cd_toc_head *th)
{
struct cdunit *cdu = unitisopen (unitnum);
if (!cdu)
return 0;
int i;
memset (&cdu->di.toc, 0, sizeof (struct cd_toc_head));
if (!cdu->tracks)
return 0;
memset (th, 0, sizeof (struct cd_toc_head));
struct cd_toc *toc = &th->toc[0];
th->first_track = 1;
th->last_track = cdu->tracks;
th->points = cdu->tracks + 3;
th->tracks = cdu->tracks;
th->lastaddress = cdu->toc[cdu->tracks].address;
toc->adr = 1;
toc->point = 0xa0;
toc->track = th->first_track;
toc++;
th->first_track_offset = 1;
for (i = 0; i < cdu->tracks; i++) {
toc->adr = cdu->toc[i].adr;
toc->control = cdu->toc[i].ctrl;
toc->track = i + 1;
toc->point = i + 1;
toc->paddress = cdu->toc[i].address;
toc++;
}
th->last_track_offset = cdu->tracks;
toc->adr = 1;
toc->point = 0xa1;
toc->track = th->last_track;
toc++;
toc->adr = 1;
toc->point = 0xa2;
toc->paddress = th->lastaddress;
toc++;
memcpy (&cdu->di.toc, th, sizeof (struct cd_toc_head));
return 1;
}
static void skipspace (TCHAR **s)
{
while (_istspace (**s))
(*s)++;
}
static void skipnspace (TCHAR **s)
{
while (!_istspace (**s))
(*s)++;
}
static TCHAR *nextstring (TCHAR **sp)
{
TCHAR *s;
TCHAR *out = NULL;
skipspace (sp);
s = *sp;
if (*s == '\"') {
s++;
out = s;
while (*s && *s != '\"')
s++;
*s++ = 0;
} else if (*s) {
out = s;
skipnspace (&s);
*s++ = 0;
}
*sp = s;
return out;
}
static int readval (const TCHAR *s)
{
int base = 10;
TCHAR *endptr;
if (s[0] == '0' && _totupper (s[1]) == 'X')
s += 2, base = 16;
return _tcstol (s, &endptr, base);
}
#define MEDIA_DESCRIPTOR "MEDIA DESCRIPTOR"
/* MDS spec structures from cdemu */
#define MDS_MEDIUM_CD 0x00 /* CD-ROM */
#define MDS_MEDIUM_CD_R 0x01 /* CD-R */
#define MDS_MEDIUM_CD_RW 0x02 /* CD-RW */
#define MDS_MEDIUM_DVD 0x10 /* DVD-ROM */
#define MDS_MEDIUM_DVD_MINUS_R 0x12 /* DVD-R */
#define MDS_TRACKMODE_UNKNOWN 0x00
#define MDS_TRACKMODE_AUDIO 0xA9 /* sector size = 2352 */
#define MDS_TRACKMODE_MODE1 0xAA /* sector size = 2048 */
#define MDS_TRACKMODE_MODE2 0xAB /* sector size = 2336 */
#define MDS_TRACKMODE_MODE2_FORM1 0xAC /* sector size = 2048 */
#define MDS_TRACKMODE_MODE2_FORM2 0xAD /* sector size = 2324 (+4) */
#define MDS_SUBCHAN_NONE 0x00 /* no subchannel */
#define MDS_SUBCHAN_PW_INTERLEAVED 0x08 /* 96-byte PW subchannel, interleaved */
#define MDS_POINT_TRACK_FIRST 0xA0 /* info about first track */
#define MDS_POINT_TRACK_LAST 0xA1 /* info about last track */
#define MDS_POINT_TRACK_LEADOUT 0xA2 /* info about lead-out */
#pragma pack(1)
typedef struct {
uae_u8 signature[16]; /* "MEDIA DESCRIPTOR" */
uae_u8 version[2]; /* Version ? */
uae_u16 medium_type; /* Medium type */
uae_u16 num_sessions; /* Number of sessions */
uae_u16 __dummy1__[2]; /* Wish I knew... */
uae_u16 bca_len; /* Length of BCA data (DVD-ROM) */
uae_u32 __dummy2__[2];
uae_u32 bca_data_offset; /* Offset to BCA data (DVD-ROM) */
uae_u32 __dummy3__[6]; /* Probably more offsets */
uae_u32 disc_structures_offset; /* Offset to disc structures */
uae_u32 __dummy4__[3]; /* Probably more offsets */
uae_u32 sessions_blocks_offset; /* Offset to session blocks */
uae_u32 dpm_blocks_offset; /* offset to DPM data blocks */
} MDS_Header; /* length: 88 bytes */
typedef struct {
uae_s32 session_start; /* Session's start address */
uae_s32 session_end; /* Session's end address */
uae_u16 session_number; /* (Unknown) */
uae_u8 num_all_blocks; /* Number of all data blocks. */
uae_u8 num_nontrack_blocks; /* Number of lead-in data blocks */
uae_u16 first_track; /* Total number of sessions in image? */
uae_u16 last_track; /* Number of regular track data blocks. */
uae_u32 __dummy2__; /* (unknown) */
uae_u32 tracks_blocks_offset; /* Offset of lead-in+regular track data blocks. */
} MDS_SessionBlock; /* length: 24 bytes */
typedef struct {
uae_u8 mode; /* Track mode */
uae_u8 subchannel; /* Subchannel mode */
uae_u8 adr_ctl; /* Adr/Ctl */
uae_u8 __dummy2__; /* Track flags? */
uae_u8 point; /* Track number. (>0x99 is lead-in track) */
uae_u32 __dummy3__;
uae_u8 min; /* Min */
uae_u8 sec; /* Sec */
uae_u8 frame; /* Frame */
uae_u32 extra_offset; /* Start offset of this track's extra block. */
uae_u16 sector_size; /* Sector size. */
uae_u8 __dummy4__[18];
uae_u32 start_sector; /* Track start sector (PLBA). */
uae_u64 start_offset; /* Track start offset. */
uae_u8 session; /* Session or index? */
uae_u8 __dummy5__[3];
uae_u32 footer_offset; /* Start offset of footer. */
uae_u8 __dummy6__[24];
} MDS_TrackBlock; /* length: 80 bytes */
typedef struct {
uae_u32 pregap; /* Number of sectors in pregap. */
uae_u32 length; /* Number of sectors in track. */
} MDS_TrackExtraBlock; /* length: 8 bytes */
typedef struct {
uae_u32 filename_offset; /* Start offset of image filename. */
uae_u32 widechar_filename; /* Seems to be set to 1 if widechar filename is used */
uae_u32 __dummy1__;
uae_u32 __dummy2__;
} MDS_Footer; /* length: 16 bytes */
#pragma pack()
static int parsemds (struct cdunit *cdu, struct zfile *zmds, const TCHAR *img)
{
MDS_Header *head;