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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <iconv.h>
#include "sidplay/sidplay2.h"
#include "sidplay/builders/resid.h"
extern "C" {
#include "codec.h"
#include "playlist.h"
#include "csid.h"
#include "md5.h"
#include "common.h"
#include "playback.h"
}
static inline void
le_int16 (int16_t in, char *out) {
char *pin = (char *)∈
#if !BIGENDIAN
out[0] = pin[0];
out[1] = pin[1];
#else
out[1] = pin[0];
out[0] = pin[1];
#endif
}
static sidplay2 *sidplay;
static ReSIDBuilder *resid;
static SidTune *tune;
static uint32_t csid_voicemask = 0;
// SLDB support costs ~1M!!!
// current hvsc sldb size is ~35k songs
#define SLDB_MAX_SONGS 40000
// ~50k subsongs in current sldb
#define SLDB_POOL_SIZE 55000
static uint8_t sldb_digests[SLDB_MAX_SONGS][16];
static int16_t sldb_pool[SLDB_POOL_SIZE];
static int sldb_poolmark;
static int16_t *sldb_lengths[SLDB_MAX_SONGS];
static int sldb_size;
static int sldb_loaded;
static const char *sldb_fname = "/home/waker/hvsc/C64Music/DOCUMENTS/Songlengths.txt";
static void sldb_load(const char *fname)
{
if (sldb_loaded) {
return;
}
sldb_loaded = 1;
FILE *fp = fopen (fname, "r");
if (!fp) {
return;
}
char str[1024];
int line = 1;
if (fgets (str, 1024, fp) != str) {
goto fail; // eof
}
if (strncmp (str, "[Database]", 10)) {
goto fail; // bad format
}
while (fgets (str, 1024, fp) == str) {
if (sldb_size >= SLDB_MAX_SONGS) {
printf ("sldb loader ran out of memory.\n");
break;
}
line++;
if (str[0] == ';') {
// printf ("reading songlength for %s", str);
continue; // comment
}
// read/validate md5
const char *p = str;
uint8_t digest[16];
int sz = 0;
char byte[3];
while (*p && sz < 16) {
byte[0] = tolower (*p);
if (!((byte[0] >= '0' && byte[0] <= '9') || (byte[0] >= 'a' && byte[0] <= 'f'))) {
printf ("invalid byte 0 in md5: %c\n", byte[0]);
break;
}
p++;
if (!(*p)) {
break;
}
byte[1] = tolower (*p);
if (!((byte[1] >= '0' && byte[1] <= '9') || (byte[1] >= 'a' && byte[1] <= 'f'))) {
printf ("invalid byte 1 in md5: %c\n", byte[1]);
break;
}
byte[2] = 0;
p++;
// convert from ascii hex to uint8_t
if (byte[1] < 'a') {
digest[sz] = byte[1] - '0';
}
else {
digest[sz] = byte[1] - 'a' + 10;
}
if (byte[0] < 'a') {
digest[sz] |= (byte[0] - '0') << 4;
}
else {
digest[sz] |= (byte[0] - 'a' + 10) << 4;
}
sz++;
}
if (sz < 16) {
printf ("bad md5 (sz=%d, line=%d)\n", sz, line);
continue; // bad song md5
}
// else {
// printf ("digest: ");
// for (int j = 0; j < 16; j++) {
// printf ("%02x", (int)digest[j]);
// }
// printf ("\n");
// exit (0);
// }
memcpy (sldb_digests[sldb_size], digest, 16);
sldb_lengths[sldb_size] = &sldb_pool[sldb_poolmark];
sldb_size++;
// check '=' sign
if (*p != '=') {
continue; // no '=' sign
}
p++;
if (!(*p)) {
continue; // unexpected eol
}
int subsong = 0;
while (*p >= ' ') {
// read subsong lengths until eol
char timestamp[7]; // up to MMM:SS
sz = 0;
while (*p > ' ' && *p != '(' && sz < 7) {
timestamp[sz++] = *p;
p++;
}
if (sz < 4 || sz == 6 && *p > ' ' && *p != '(') {
break; // bad timestamp
}
timestamp[sz] = 0;
// check for unknown time
int16_t time = -1;
if (!strcmp (timestamp, "-:--")) {
time = -1;
}
else {
// parse timestamp
const char *colon = strchr (timestamp, ':');
if (!colon) {
break; // bad timestamp
}
// minute
char minute[4];
strncpy (minute, timestamp, colon-timestamp);
minute[colon-timestamp] = 0;
// second
char second[3];
strncpy (second, colon+1, 3);
//printf ("subsong %d, time %s:%s\n", subsong, minute, second);
time = atoi (minute) * 60 + atoi (second);
}
if (sldb_poolmark >= SLDB_POOL_SIZE) {
printf ("sldb ran out of memory\n");
goto fail;
}
sldb_lengths[sldb_size-1][subsong] = time;
sldb_poolmark++;
subsong++;
// prepare for next timestamp
if (*p == '(') {
// skip until next whitespace
while (*p > ' ') {
p++;
}
}
if (*p < ' ') {
break; // eol
}
// skip white spaces
while (*p == ' ') {
p++;
}
if (*p < ' ') {
break; // eol
}
}
}
fail:
fclose (fp);
printf ("HVSC sldb loaded %d songs, %d subsongs total\n", sldb_size, sldb_poolmark);
}
static int
sldb_find (const uint8_t *digest) {
for (int i = 0; i < sldb_size; i++) {
if (!memcmp (digest, sldb_digests[i], 16)) {
return i;
}
}
return -1;
}
extern "C" int
csid_init (const char *fname, int track, float start, float end) {
sidplay = new sidplay2;
resid = new ReSIDBuilder ("wtf");
resid->create (sidplay->info ().maxsids);
// resid->create (1);
resid->filter (true);
resid->sampling (p_get_rate ());
tune = new SidTune (fname);
// calc md5
uint8_t sig[16];
md5_t md5;
md5_init (&md5);
md5_process (&md5, (const char *)tune->cache.get () + tune->fileOffset, tune->getInfo ().c64dataLen);
char tmp[2];
le_int16 (tune->getInfo ().initAddr, tmp);
md5_process (&md5, tmp, 2);
le_int16 (tune->getInfo ().playAddr, tmp);
md5_process (&md5, tmp, 2);
le_int16 (tune->getInfo ().songs, tmp);
md5_process (&md5, tmp, 2);
for (int s = 1; s <= tune->getInfo ().songs; s++)
{
tune->selectSong (s);
// songspeed is uint8_t, so no need for byteswap
md5_process (&md5, &tune->getInfo ().songSpeed, 1);
}
if (tune->getInfo ().clockSpeed == SIDTUNE_CLOCK_NTSC) {
md5_process (&md5, &tune->getInfo ().clockSpeed, sizeof (tune->getInfo ().clockSpeed));
}
md5_finish (&md5, sig);
tune->selectSong (track+1);
csid.info.channels = tune->isStereo () ? 2 : 1;
sid2_config_t conf;
conf = sidplay->config ();
conf.frequency = p_get_rate ();
conf.precision = 16;
conf.playback = csid.info.channels == 2 ? sid2_stereo : sid2_mono;
conf.sidEmulation = resid;
conf.optimisation = 0;
sidplay->config (conf);
sidplay->load (tune);
csid.info.bitsPerSample = 16;
csid.info.samplesPerSecond = p_get_rate ();
csid.info.position = 0;
float length = 120;
sldb_load(sldb_fname);
if (sldb_loaded) {
int song = sldb_find (sig);
if (song >= 0 && sldb_lengths[song][track] >= 0) {
length = sldb_lengths[song][track];
}
// if (song < 0) {
// printf ("song %s not found in db, md5: ", fname);
// for (int j = 0; j < 16; j++) {
// printf ("%02x", (int)sig[j]);
// }
// printf ("\n");
// }
}
csid.info.duration = length;
int maxsids = sidplay->info ().maxsids;
for (int k = 0; k < maxsids; k++) {
sidemu *emu = resid->getsidemu (k);
if (emu) {
for (int i = 0; i < 3; i++) {
bool mute = csid_voicemask & (1 << i) ? true : false;
emu->voice (i, mute ? 0x00 : 0xff, mute);
}
}
}
return 0;
}
extern "C" void
csid_free (void) {
delete sidplay;
sidplay = 0;
delete resid;
resid = 0;
delete tune;
tune = 0;
}
extern "C" int
csid_read (char *bytes, int size) {
if (csid.info.position > csid.info.duration) {
return 0;
}
int rd = sidplay->play (bytes, size/csid.info.channels);
csid.info.position += size/csid.info.channels/2 / (float)csid.info.samplesPerSecond;
return rd * csid.info.channels;
}
extern "C" int
csid_seek (float time) {
float t = time;
if (t < csid.info.position) {
// reinit
sidplay->load (tune);
}
else {
t -= csid.info.position;
}
resid->filter (false);
int samples = t * csid.info.samplesPerSecond;
samples *= 2 * csid.info.channels;
uint16_t buffer[4096 * csid.info.channels];
while (samples > 0) {
int n = min (samples, 4096) * csid.info.channels;
int done = sidplay->play (buffer, n);
if (done < n) {
printf ("sid seek failure\n");
return -1;
}
samples -= done;
}
resid->filter (true);
csid.info.position = time;
return 0;
}
static const char *
convstr (const char* str) {
int sz = strlen (str);
static char out[2048];
const char *enc = "iso8859-1";
iconv_t cd = iconv_open ("utf8", enc);
if (!cd) {
printf ("unknown encoding: %s\n", enc);
return NULL;
}
else {
size_t inbytesleft = sz;
size_t outbytesleft = 2047;
char *pin = (char*)str;
char *pout = out;
memset (out, 0, sizeof (out));
size_t res = iconv (cd, &pin, &inbytesleft, &pout, &outbytesleft);
iconv_close (cd);
}
return out;
}
extern "C" playItem_t *
csid_insert (playItem_t *after, const char *fname) {
sldb_load(sldb_fname);
SidTune *tune;
tune = new SidTune (fname);
int tunes = tune->getInfo ().songs;
for (int s = 0; s < tunes; s++) {
if (tune->selectSong (s+1)) {
unsigned length = 120;
playItem_t *it = (playItem_t*)malloc (sizeof (playItem_t));
memset (it, 0, sizeof (playItem_t));
it->codec = &csid;
it->fname = strdup (fname);
it->tracknum = s;
it->timestart = 0;
it->timeend = 0;
SidTuneInfo sidinfo;
tune->getInfo (sidinfo);
int i = sidinfo.numberOfInfoStrings;
int title_added = 0;
if (i >= 1 && sidinfo.infoString[0] && sidinfo.infoString[0][0]) {
const char *meta;
if (sidinfo.songs > 1) {
meta = "album";
}
else {
meta = "title";
title_added = 1;
}
ps_add_meta (it, meta, convstr (sidinfo.infoString[0]));
}
if (i >= 2 && sidinfo.infoString[1] && sidinfo.infoString[1][0]) {
ps_add_meta (it, "artist", convstr (sidinfo.infoString[1]));
}
if (i >= 3 && sidinfo.infoString[2] && sidinfo.infoString[2][0]) {
ps_add_meta (it, "copyright", convstr (sidinfo.infoString[2]));
}
for (int j = 3; j < i; j++)
{
if (sidinfo.infoString[j] && sidinfo.infoString[j][0]) {
ps_add_meta (it, "info", convstr (sidinfo.infoString[j]));
}
}
char trk[10];
snprintf (trk, 10, "%d", s+1);
ps_add_meta (it, "track", trk);
if (!title_added) {
ps_add_meta (it, "title", NULL);
}
after = ps_insert_item (after, it);
}
}
delete tune;
return after;
}
static const char *exts[]=
{
"sid",NULL
};
extern "C" const char **csid_getexts (void) {
return exts;
}
int
csid_numvoices (void) {
return 3;
}
void
csid_mutevoice (int voice, int mute) {
csid_voicemask &= ~ (1<<voice);
csid_voicemask |= ((mute ? 1 : 0) << voice);
if (resid) {
int maxsids = sidplay->info ().maxsids;
for (int k = 0; k < maxsids; k++) {
sidemu *emu = resid->getsidemu (k);
if (emu) {
for (int i = 0; i < 3; i++) {
bool mute = csid_voicemask & (1 << i) ? true : false;
emu->voice (i, mute ? 0x00 : 0xff, mute);
}
}
}
}
}
codec_t csid = {
csid_init,
csid_free,
csid_read,
csid_seek,
csid_insert,
csid_getexts,
csid_numvoices,
csid_mutevoice
};
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