ref: 172dc0005aa16dea8451bf2bcef7f3eb04df2c04
dir: /sys/src/cmd/audio/zuke/mkplist.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include <tags.h>
#include <thread.h>
#include "plist.h"
#include "icy.h"
typedef struct Aux Aux;
enum
{
Maxname = 256+2, /* seems enough? */
Maxdepth = 16, /* max recursion depth */
};
#define MAX(a, b) (a > b ? a : b)
struct Aux {
Meta;
Biobuf *f;
int firstiscomposer;
int keepfirstartist;
};
static int simplesort;
static int moddec;
static Channel *cmeta;
static Channel *cpath;
static Meta **tracks;
static int ntracks;
static char *fmts[] =
{
[Fmp3] = "mp3",
[Fogg] = "ogg",
[Fflac] = "flac",
[Fm4a] = "m4a",
[Fopus] = "opus",
[Fwav] = "wav",
[Fit] = "mod",
[Fxm] = "mod",
[Fs3m] = "mod",
[Fmod] = "mod",
};
static int cmpmeta(void *, void *);
static void
metathread(void *cexit)
{
int max;
Meta *m;
max = 0;
for(;;){
if((m = recvp(cmeta)) == nil)
break;
if(ntracks+1 > max){
max = max ? max*2 : 1024;
tracks = realloc(tracks, sizeof(Meta*)*max);
}
tracks[ntracks++] = m;
}
qsort(tracks, ntracks, sizeof(Meta*), cmpmeta);
sendul(cexit, 0);
threadexits(nil);
}
static void
cb(Tagctx *ctx, int t, const char *k, const char *v, int offset, int size, Tagread f)
{
int i, iscomposer;
Aux *aux;
aux = ctx->aux;
switch(t){
case Tartist:
if(aux->numartist < Maxartist){
iscomposer = strcmp(k, "TCM") == 0 || strcmp(k, "TCOM") == 0;
/* prefer lead performer/soloist, helps when TP2/TPE2 is the first one and is set to "VA" */
/* always put composer first, if available */
if(iscomposer || (!aux->keepfirstartist && (strcmp(k, "TP1") == 0 || strcmp(k, "TPE1") == 0))){
if(aux->numartist > 0)
aux->artist[aux->numartist] = aux->artist[aux->numartist-1];
aux->artist[0] = strdup(v);
aux->numartist++;
aux->keepfirstartist = 1;
aux->firstiscomposer = iscomposer;
return;
}
for(i = 0; i < aux->numartist; i++){
if(cistrcmp(aux->artist[i], v) == 0)
return;
}
aux->artist[aux->numartist++] = strdup(v);
}
break;
case Talbum:
if(aux->album == nil)
aux->album = strdup(v);
break;
case Ttitle:
if(aux->title == nil)
aux->title = strdup(v);
break;
case Tdate:
if(aux->date == nil)
aux->date = strdup(v);
break;
case Ttrack:
if(aux->track == nil)
aux->track = strdup(v);
break;
case Timage:
if(aux->imagefmt == nil){
aux->imagefmt = strdup(v);
aux->imageoffset = offset;
aux->imagesize = size;
aux->imagereader = f != nil;
}
break;
case Ttrackgain:
aux->rgtrack = atof(v);
if(strncmp(k, "R128_", 5) == 0)
aux->rgtrack /= 256.0;
break;
case Talbumgain:
aux->rgalbum = atof(v);
if(strncmp(k, "R128_", 5) == 0)
aux->rgalbum /= 256.0;
break;
}
}
static int
ctxread(Tagctx *ctx, void *buf, int cnt)
{
return Bread(((Aux*)ctx->aux)->f, buf, cnt);
}
static int
ctxseek(Tagctx *ctx, int offset, int whence)
{
return Bseek(((Aux*)ctx->aux)->f, offset, whence);
}
static uvlong
modduration(char *path)
{
int f, pid, p[2], n;
char t[1024], *s;
if(!moddec)
return 0;
pipe(p);
if((pid = rfork(RFPROC|RFFDG|RFNOTEG|RFCENVG|RFNOWAIT)) == 0){
dup(f = open(path, OREAD), 0); close(f);
close(1);
dup(p[1], 2); close(p[1]);
close(p[0]);
execl("/bin/audio/moddec", "moddec", "-r", "0", nil);
sysfatal("execl: %r");
}
close(p[1]);
n = pid > 0 ? readn(p[0], t, sizeof(t)-1) : -1;
close(p[0]);
if(n > 0){
t[n] = 0;
for(s = t; s != nil; s = strchr(s+1, '\n')){
if(*s == '\n')
s++;
if(strncmp(s, "duration: ", 10) == 0)
return strtod(s+10, nil)*1000.0;
}
}
return 0;
}
static Meta *
scanfile(char *path)
{
char buf[4096], *s;
Aux aux = {0};
Tagctx ctx = {
.read = ctxread,
.seek = ctxseek,
.tag = cb,
.buf = buf,
.bufsz = sizeof(buf),
.aux = &aux,
};
int res;
Meta *m;
if((aux.f = Bopen(path, OREAD)) == nil){
fprint(2, "%s: %r\n", path);
return nil;
}
res = tagsget(&ctx);
Bterm(aux.f);
if(ctx.format == Funknown)
return nil;
if(ctx.format >= nelem(fmts))
sysfatal("mkplist needs a rebuild with updated libtags");
m = malloc(sizeof(*m));
memmove(m, &aux.Meta, sizeof(*m));
if(res != 0)
fprint(2, "%s: no tags\n", path);
if(ctx.duration == 0){
if(ctx.format == Fit || ctx.format == Fxm || ctx.format == Fs3m || ctx.format == Fmod)
ctx.duration = modduration(path);
if(ctx.duration == 0)
fprint(2, "%s: no duration\n", path);
}
m->duration = ctx.duration;
if(m->title == nil){
if((s = utfrrune(path, '/')) == nil)
s = path;
m->title = strdup(s+1);
}
m->path = strdup(path);
m->filefmt = fmts[ctx.format];
return m;
}
static void
tagreadproc(void *cexit)
{
char *path;
Meta *m;
for(;;){
if(recv(cpath, &path) != 1)
break;
if((m = scanfile(path)) != nil)
sendp(cmeta, m);
free(path);
}
sendul(cexit, 0);
threadexits(nil);
}
static int
scan(char **dir, int depth)
{
char *path;
Dir *buf, *d;
long n;
int dirfd, len;
if((dirfd = open(*dir, OREAD)) < 0){
fprint(2, "scan: %r\n");
return -1;
}
len = strlen(*dir);
if((*dir = realloc(*dir, len+1+Maxname)) == nil)
sysfatal("scan: no memory");
path = *dir;
path[len] = '/';
for(n = 0, buf = nil; n >= 0;){
if((n = dirread(dirfd, &buf)) < 0){
path[len] = 0;
sendp(cpath, strdup(path));
break;
}
if(n == 0){
free(buf);
break;
}
for(d = buf; n > 0; n--, d++){
if(strcmp(d->name, ".") == 0 || strcmp(d->name, "..") == 0)
continue;
path[len+1+Maxname-2] = 0;
strncpy(&path[len+1], d->name, Maxname);
if(path[len+1+Maxname-2] != 0)
sysfatal("Maxname=%d was a bad choice", Maxname);
if((d->mode & DMDIR) == 0){
sendp(cpath, strdup(path));
}else if(depth < Maxdepth){ /* recurse into the directory */
scan(dir, depth+1);
path = *dir;
}else{
fprint(2, "%s: too deep\n", path);
}
}
free(buf);
}
close(dirfd);
return 0;
}
static int
cmpmeta(void *a_, void *b_)
{
Meta *a, *b;
char *ae, *be;
int i, x;
a = *(Meta**)a_;
b = *(Meta**)b_;
if(simplesort)
return cistrcmp(a->path, b->path);
ae = utfrrune(a->path, '/');
be = utfrrune(b->path, '/');
if(ae != nil && be != nil && (x = cistrncmp(a->path, b->path, MAX(ae-a->path, be-b->path))) != 0) /* different path */
return x;
/* same path, must be the same album/cd, but first check */
for(i = 0; i < a->numartist && i < b->numartist; i++){
if((x = cistrcmp(a->artist[i], b->artist[i])) != 0){
if(a->album != nil && b->album != nil && cistrcmp(a->album, b->album) != 0)
return x;
}
}
if(a->date != nil || b->date != nil){
if(a->date == nil && b->date != nil) return -1;
if(a->date != nil && b->date == nil) return 1;
if((x = atoi(a->date) - atoi(b->date)) != 0) return x;
}else if(a->album != nil || b->album != nil){
if(a->album == nil && b->album != nil) return -1;
if(a->album != nil && b->album == nil) return 1;
if((x = cistrcmp(a->album, b->album)) != 0) return x;
}
if(a->track != nil || b->track != nil){
if(a->track == nil && b->track != nil) return -1;
if(a->track != nil && b->track == nil) return 1;
if((x = atoi(a->track) - atoi(b->track)) != 0) return x;
}
return cistrcmp(a->path, b->path);
}
static void
usage(void)
{
fprint(2, "usage: %s [-s] directory/file/URL [...] > noise.plist\n", argv0);
exits("usage");
}
void
threadmain(int argc, char **argv)
{
char *dir, *s, wd[4096];
Channel *cexit;
int i, nproc;
static Biobuf out;
Meta *m;
ARGBEGIN{
case 's':
simplesort++;
break;
default:
usage();
}ARGEND
if(argc < 1)
usage();
if(getwd(wd, sizeof(wd)) == nil)
sysfatal("%r");
moddec = access("/bin/audio/moddec", AEXEC) == 0;
cmeta = chancreate(sizeof(Meta*), 0);
cpath = chancreate(sizeof(char*), 32);
cexit = chancreate(sizeof(ulong), 0);
if((s = getenv("NPROC")) == nil)
s = strdup("1");
if((nproc = atoi(s)-1) < 1)
nproc = 1;
free(s);
for(i = 0; i < nproc; i++)
proccreate(tagreadproc, cexit, 8*1024);
/* give metathread a large stack for qsort() */
threadcreate(metathread, cexit, 64*1024);
Binit(&out, 1, OWRITE);
for(i = 0; i < argc; i++){
if(strncmp(argv[i], "http://", 7) == 0 || strncmp(argv[i], "https://", 8) == 0){
m = mallocz(sizeof(*m), 1);
m->path = argv[i];
m->filefmt = "";
if(icyget(m, -1, nil) != 0){
fprint(2, "%s: %r\n", argv[i]);
free(m);
}else{
if(m->numartist == 0)
m->artist[m->numartist++] = argv[i];
sendp(cmeta, m);
}
}else{
if(argv[i][0] == '/')
dir = strdup(argv[i]);
else
dir = smprint("%s/%s", wd, argv[i]);
cleanname(dir);
scan(&dir, 0);
free(dir);
}
}
chanclose(cpath);
for(i = 0; i < nproc; i++)
recvul(cexit);
chanclose(cmeta);
recvul(cexit);
for(i = 0; i < ntracks; i++){
if(tracks[i]->numartist < 1)
fprint(2, "no artists: %s\n", tracks[i]->path);
if(tracks[i]->title == nil)
fprint(2, "no title: %s\n", tracks[i]->path);
printmeta(&out, tracks[i]);
}
Bterm(&out);
fprint(2, "found %d tagged tracks\n", ntracks);
threadexitsall(nil);
}