Few questions about LUA

masterMIND

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Few questions about LUA

« on: August 09, 2007, 02:44:52 AM »

Hi everyone,

I started programming in LUA (I'm programming in C++ too, but I have had many problems whit cygwin so I took LUA for PSP programming) and I have some questions:

1. Is C++ far more better than LUA (in PSP programming)
2. Can I create EBOOT in LUA (if I can, how)
3. Please can you tell me program wich converts most common music files to .xm
4. Can I load my mp3 files in LUA and build mp3 player (do I need for mp3 smth as libraries in C++)


« Last Edit: August 09, 2007, 02:51:25 AM by masterMIND »	Logged

michaelp

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Re: Few questions about LUA

« Reply #1 on: August 09, 2007, 07:39:40 AM »

1. Better in the way that C++ is more powerful, and can do more than LUA can. By powerful, I mean faster, and probably more image and sound formats.
2. Yes.
Download LUAPlayer for the PSP (whatever version you want)
Inside the "luaplayer" folder, delete everything in it expect the "System folder". (So delete applications folder, and whatever else is in there.)
Put the file that you want to be ran in the luaplayer folder, and rename "index.lua". (Assuming it isn't already named that.)
Now use it like normal homebrew.

3. I don't know.

4. Yes you can load Mp3 files in LUA using the version of luaplayer:

Lua Player mod 4

You will find the mp3 functions on the page, and the downloads at the bottom.


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masterMIND

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Re: Few questions about LUA

« Reply #2 on: August 09, 2007, 09:06:25 AM »

Thank you very much,you have helped me much. Very Happy


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Soulkiller

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Re: Few questions about LUA

« Reply #3 on: August 09, 2007, 09:16:56 AM »

1. Depends what you mean by powerful. C is more powerful in the fact that it executes a lot faster than Lua. Lua is more powerful in the fact that its more forgiving and lets you write a lot less then it would take to write a C equivalent.

2.yes
Step by Step instructions:
http://luaplayer.org/forums/index.php?topic=18.0

3. XM is a MOD type format of music, meaning that is comprised of playing smaller "samples" at different frequencies at certain times and with different effects. This is not how conventional music formats play like mp3, wav, ogg, etc. Therefore their is no converter to convert conventional music to MOD type music, but you can convert MOD type music to conventional. If you want you could mickey-mouse it and just have the MOD music play a long sample thats really just conventional music but I wouldn't recommend it if you like huge file sizes that would probably never load into Luaplayer anyway. If you would like to make your own MOD music then you need a tracker. I would recommend this one
Mod Plug Tracker

4.Their are custom versions of Luaplayer that added support for it like Cools mod 4, you can find it here
Lua Player cools mod 4
Their is no need to link different libs into Lua code like you have to in C


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masterMIND

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Re: Few questions about LUA

« Reply #4 on: August 09, 2007, 10:27:05 AM »

Tnx,very much by question is C++ more powerful than LUA I wanted to ask can I do more things and more complex code in C++ .

I have one more question:

Can you tell me why do i get error on this line:

Code:

ff7=Mp3.load("music/ff7.mp3")


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BoBo124

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Re: Few questions about LUA

« Reply #5 on: August 09, 2007, 10:46:05 AM »

Make sure the path to the file is correct. Also, if you have capitals in the folder/file names, include them (not sure if that will make a difference, but worth a shot). Also, you could be missing something like a ")" on the line before, in that case it would give the error on the next line. It would help if we knew the error.


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michaelp

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Re: Few questions about LUA

« Reply #6 on: August 09, 2007, 10:48:02 AM »

This one gave me a thought too when I first used it.
You don't actually assign a variable to the Mp3. You can only load one.
Use it like this:

Code:

Mp3.load("music/filename.mp3")
Mp3.play()

When you use Mp3.play(), it will just play the Mp3 that you loaded.


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masterMIND

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Re: Few questions about LUA

« Reply #7 on: August 09, 2007, 11:02:44 AM »

Tnx,problem solved Very Happy

Can I load more MP3 files and when I press X player will play first song, if I press O player will play second song..

I've tried whit this:

Code:

ff7=Mp3.load("music/ff7.mp3")
sw=Mp3.load("music/sw.mp3")
sw=Mp3.load("music/sw1.mp3")
while true do   
           
          screen:blit(0, 0, background, false)
          pad = Controls.read()
if pad:right() then
                    screen:blit(90, 65, right)
                    screen:print(160, 150,"ONE WINGED ANGEL",black)
                    screen.flip()
                    screen.waitVblankStart(240)
                    Mp3.play(ff7)
          end

          if pad:down() then
                    screen:blit(60, 80, down)
                    screen.flip()
          end

          if pad:left() then
                    screen:blit(30, 65, left)
                    screen.flip()
                    Mp3.stop()
          end

          if pad:l() then
                    screen:blit(4, 6, l)
                    screen.flip()
                    Mp3.play(sw)
          end

          if pad:r() then
                    screen:blit(403, 4, r)
                    screen.flip()
                    Mp3.play(swi)
          end
end

but this didn't work.


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BoBo124

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Re: Few questions about LUA

« Reply #8 on: August 09, 2007, 01:38:13 PM »

You can try this

Code:

while true do

   pad = Controls.read()

   if pad:right then
      Mp3.stop()
      Mp3.load("music/ff1.mp3")
      Mp3.play()
   end

   if pad:l() then
      Mp3.stop()
      Mp3.load("music/sw.mp3")
      Mp3.play()
   end

   if pad:r() then
      Mp3.stop()
      Mp3.load("music/swi")
      Mp3.play()
   end

   if pad:start() then
      break
   end

end

I haven't used the MP3 plugin, but by what I've read, you can only have one MP3 loaded at a time. And when you use Mp3.stop() it delets the MP3 from memory, so you have to load it again, or load another. Also, I don't know if this will work or not, it only took me about a minute.


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masterMIND

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Re: Few questions about LUA

« Reply #9 on: August 09, 2007, 02:57:24 PM »

Thanks it worked, thank you all for help, and sorry for bothering


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