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Could MP3 support be made optional?

https://love2d.org./forums/viewtopic.php?t=2523

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Could MP3 support be made optional?

Posted: Sun Feb 20, 2011 12:06 pm
by RedDwarf
Something like this:

Code: Select all

Index: configure.in
===================================================================
--- configure.in.orig
+++ configure.in
@@ -36,7 +35,7 @@ AC_SEARCH_LIBS([TIFFOpen], [tiff], [], A
 AC_SEARCH_LIBS([FT_Load_Glyph], [freetype], [], AC_MSG_ERROR([Can't LÖVE without FreeType]))
 AC_SEARCH_LIBS([PHYSFS_init], [physfs], [], AC_MSG_ERROR([Can't LÖVE without PhysicsFS]))
 AC_SEARCH_LIBS([ModPlug_Load], [modplug], [], AC_MSG_ERROR([Can't LÖVE without ModPlug]))
-AC_SEARCH_LIBS([mpg123_open_feed], [mpg123], [], AC_MSG_ERROR([Can't LÖVE without Mpg123]))
+AC_SEARCH_LIBS([mpg123_open_feed], [mpg123], [AC_DEFINE([WITH_MPG123], [], [Description for mpg123])], AC_MSG_WARN([Mpg123 is not available]))
 AC_SEARCH_LIBS([mpg123_seek_64], [mpg123], AC_SUBST([FILE_OFFSET],[-D_FILE_OFFSET_BITS=64]), AC_SUBST([FILE_OFFSET],[]))
 AC_SEARCH_LIBS([ov_open], [vorbisfile], [], AC_MSG_ERROR([Can't LÖVE without VorbisFile]))
 AC_CONFIG_FILES([
Index: src/modules/sound/lullaby/Mpg123Decoder.cpp
===================================================================
--- src/modules/sound/lullaby/Mpg123Decoder.cpp.orig
+++ src/modules/sound/lullaby/Mpg123Decoder.cpp
@@ -18,6 +18,10 @@
 * 3. This notice may not be removed or altered from any source distribution.
 **/
 
+#include "../config.h"
+
+#ifdef WITH_MPG123
+
 #include "Mpg123Decoder.h"
 
 #include <common/Exception.h>
@@ -227,3 +231,4 @@ namespace lullaby
 } // lullaby
 } // sound
 } // love
+#endif
Index: src/modules/sound/lullaby/Mpg123Decoder.h
===================================================================
--- src/modules/sound/lullaby/Mpg123Decoder.h.orig
+++ src/modules/sound/lullaby/Mpg123Decoder.h
@@ -17,7 +17,9 @@
 *    misrepresented as being the original software.
 * 3. This notice may not be removed or altered from any source distribution.
 **/
+#include "../config.h"
 
+#ifdef WITH_MPG123
 #ifndef LOVE_SOUND_LULLABY_LIBMPG123_DECODER_H
 #define LOVE_SOUND_LULLABY_LIBMPG123_DECODER_H
 
@@ -77,3 +79,4 @@ namespace lullaby
 } // love
 
 #endif // LOVE_SOUND_LULLABY_LIBMPG123_DECODER_H
+#endif
Index: src/modules/sound/lullaby/Sound.cpp
===================================================================
--- src/modules/sound/lullaby/Sound.cpp.orig
+++ src/modules/sound/lullaby/Sound.cpp
@@ -18,10 +18,14 @@
 * 3. This notice may not be removed or altered from any source distribution.
 **/
 
+#include "../config.h"
+
 #include "Sound.h"
 
 #include "ModPlugDecoder.h"
+#ifdef WITH_MPG123
 #include "Mpg123Decoder.h"
+#endif
 #include "VorbisDecoder.h"
 //#include "FLACDecoder.h"
 
@@ -37,7 +41,9 @@ namespace lullaby
 
 	Sound::~Sound()
 	{
+		#ifdef WITH_MPG123
 		Mpg123Decoder::quit();
+		#endif
 	}
 
 	const char * Sound::getName() const
@@ -55,8 +61,10 @@ namespace lullaby
 		// Find a suitable decoder here, and return it.
 		if(ModPlugDecoder::accepts(ext))
 			decoder = new ModPlugDecoder(data, ext, bufferSize);
+		#ifdef WITH_MPG123
 		else if(Mpg123Decoder::accepts(ext))
 			decoder = new Mpg123Decoder(data, ext, bufferSize);
+		#endif
 		else if(VorbisDecoder::accepts(ext))
 			decoder = new VorbisDecoder(data, ext, bufferSize);
 		/*else if (FLACDecoder::accepts(ext))
It would help package it in distributions that can't package MP3 support because of patents.

Re: Could MP3 support be made optional?

Posted: Sun Feb 20, 2011 12:16 pm
by thelinx
Sounds like a good idea.

You might want to submit it to the issue tracker.

Re: Could MP3 support be made optional?

Posted: Sun Feb 20, 2011 12:17 pm
by nevon
Wouldn't that impede with Löve's philosophy that a Löve game should run, completely unmodified, on any platform that Löve supports (unless the Lover has specifically introduced platform specific features)?

Re: Could MP3 support be made optional?

Posted: Sun Feb 20, 2011 12:39 pm
by Robin
Plus, it looks more like something for µLÖVE. I get a database error, hopefully it'll be fixed soon. EDIT: you can view the source, though, that works fine.

Re: Could MP3 support be made optional?

Posted: Tue Sep 09, 2014 10:31 am
by MrJones
What about offering a download of love for windows without mp3 support?

I don't care about more formats or anything, but mp3 still appears to be patent encumbered and Technicolor appears to be actively sueing people for distributing mp3 decoders without license (see http://en.wikipedia.org/wiki/MP3#Licens ... ent_issues). FWIW, I think that is also why LAME also doesn't provide any compiled binaries of their dll for that reason on their website. See here for mp3 fees, which I'm sure no indie dev is looking forward to pay: http://www.mp3licensing.com/royalty/

So if some indie devs want to sell a game and distribute love along with it, you'd do them a favor by providing a version without mp3 support.

Re: Could MP3 support be made optional?

Posted: Tue Sep 09, 2014 1:19 pm
by slime
You can compile LÖVE without mpg123 decoding support, it was made optional several years ago (and this thread is 3.5 years old.)

Maybe LÖVE's code could eventually dynamically load the library at runtime though, so you could just remove the mpg123 dll from your game rather than recompiling LÖVE.
MrJones wrote:Technicolor appears to be actively sueing people for distributing mp3 decoders without license (see http://en.wikipedia.org/wiki/MP3#Licens ... ent_issues).
The link in the Wikipedia page is dead (and that part was added to the wiki page 4 years ago.) Do you have some recent examples?

Re: Could MP3 support be made optional?

Posted: Fri Apr 29, 2016 6:05 pm
by Zvoc47
I'm not sure if I may bump this topic, but I need help. I try to remove mpg123.dll from the game's folder and the EXE file just won't work. Also, I'd like a totally GPL-/LGPL-less game engine because I really don't like that license as it could terminate rights of players who would reverse-engineer my game (I'd like them to reverse-engineer it, though). Reverse-engineered binaries cannot be shown in source code and cannot comply with GPL/LGPL.

Re: Could MP3 support be made optional?

Posted: Sat Apr 30, 2016 3:54 pm
by pgimeno
I don't know where you get that the GPL/LGPL don't allow reverse engineering. There's no such provision. The LGPL v2.x in particular includes this statement:
6. As an exception to the Sections above, you may also combine or link a "work that uses the Library" with the Library to produce a work containing portions of the Library, and distribute that work under terms of your choice, provided that the terms permit modification of the work for the customer's own use and reverse engineering for debugging such modifications.
and there's a similar one for the LGPL v3.0. It therefore encourages licenses that allow reverse engineering. It also doesn't explicitly prohibit reverse engineering, like many proprietary EULAs do, therefore it's in pretty much the same situation as the X11 or the ZLib or the WTFPL license.

Re: Could MP3 support be made optional?

Posted: Sat Apr 30, 2016 4:31 pm
by slime
As I mentioned in my previous post, you will have to recompile LÖVE if you don't want libmpg123. It and OpenAL Soft are the only two LGPL libraries LÖVE 0.10 uses.

None of LÖVE's code (including love.exe and love.dll) or any of the libraries aside from those two are LGPL anyway though. Your game (and LÖVE's code) won't inherit any of the LGPL.
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