code: plan9front

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libtags, zuke: add *.mod support (thanks kemal)

--- a/sys/src/cmd/audio/libtags/mkfile

+++ b/sys/src/cmd/audio/libtags/mkfile

@@ -9,6 +9,7 @@

 	id3v2.$O\

 	it.$O\

 	m4a.$O\

+	mod.$O\

 	opus.$O\

 	s3m.$O\

 	tags.$O\

--- /dev/null

+++ b/sys/src/cmd/audio/libtags/mod.c

@@ -1,0 +1,46 @@

+#include "tagspriv.h"

+

+/* insane. */

+static char* variants[] =

+{

+	"M.K.",

+	"M!K!",

+	"M&K!",

+	"N.T.",

+	"NSMS",

+	"FLT4",

+	"M\0\0\0",

+	"8\0\0\0",

+	"FEST",

+	"FLT8",

+	"CD81",

+	"OCTA",

+	"OKTA",

+	"16CN",

+	"32CN",

+	nil,

+};

+

+int

+tagmod(Tagctx *ctx)

+{

+	char d[20+1];

+	int i;

+

+	if (ctx->seek(ctx, 1080, 0) != 1080)

+		return -1;

+	if (ctx->read(ctx, d, 4) != 4)

+		return -1;

+	for (i = 0; ; i++)

+		if (variants[i] == nil)

+			return -1;

+		else if (memcmp(d, variants[i], 4) == 0)

+			break;

+	memset(d, 0, sizeof d);

+	if (ctx->seek(ctx, 0, 0) != 0)

+		return -1;

+	if (ctx->read(ctx, d, 20) != 20)

+		return -1;

+	txtcb(ctx, Ttitle, "", d);

+	return 0;

+}

--- a/sys/src/cmd/audio/libtags/tags.c

+++ b/sys/src/cmd/audio/libtags/tags.c

@@ -18,6 +18,7 @@

 extern int tagvorbis(Tagctx *ctx);

 extern int tagwav(Tagctx *ctx);

 extern int tagxm(Tagctx *ctx);

+extern int tagmod(Tagctx *ctx);

 static const Getter g[] =

 {

@@ -31,6 +32,7 @@

 	{tagit, Fit},

 	{tagxm, Fxm},

 	{tags3m, Fs3m},

+	{tagmod, Fmod},

 };

 void

--- a/sys/src/cmd/audio/libtags/tags.h

+++ b/sys/src/cmd/audio/libtags/tags.h

@@ -33,6 +33,7 @@

 	Fit,

 	Fxm,

 	Fs3m,

+	Fmod,

 	Fmax,

 };

--- a/sys/src/cmd/audio/zuke/mkplist.c

+++ b/sys/src/cmd/audio/zuke/mkplist.c

@@ -31,6 +31,7 @@

 	[Fit] = "mod",

 	[Fxm] = "mod",

 	[Fs3m] = "mod",

+	[Fmod] = "mod",

 };

 static Meta *

@@ -196,7 +197,10 @@

 	}

 	if(ctx.duration == 0){

-		if(ctx.format == Fit || ctx.format == Fxm || ctx.format == Fs3m)

+		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);