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mgr.inz.Player
I post too much
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Joined: 07 Nov 2008
Posts: 4438
Location: W kraju nad Wisla. UTC+01:00
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 Posted: Fri Jan 30, 2015 2:57 pm Post subject: MemoryStream and write method [bug] |
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| Code: | myStream = createMemoryStream()
table = {1,2,3,4,5}
myStream.write(table)
print(myStream.Size) -- prints zero
myStream.write(table,4)
print(myStream.Size) -- prints 1
myStream.write(table,5)
print(myStream.Size) -- prints 2
myStream.write(dwordToByteTable(1))
print(myStream.Size) -- prints 2
myStream.write(dwordToByteTable(1),4)
print(myStream.Size) -- prints 3 |
Conclusion:
write(table) - doesn't work
write(table,n) - writes first byte
I wanted to write dwords and etc. I have to make workarounds:
| Code: | myStream = createMemoryStream()
myStream.fixedwrite = function (t)
for _,v in ipairs(t) do myStream.write({v},1) end
end
myStream.writeDword = function (v)
myStream.fixedwrite(dwordToByteTable(v))
end
myStream.writeDword(1)
print(myStream.Size) -- prints 4
myStream.fixedwrite({1,2,3,4,5})
print(myStream.Size) -- prints 9
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Dark Byte
Site Admin
 Reputation: 471
Joined: 09 May 2003
Posts: 25831
Location: The netherlands
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| Posted: Fri Jan 30, 2015 3:44 pm Post subject: |
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fixed in the svn
But just wondering, what do you need memorystream for ?
(Check the java lua files for another example of stream editing. Lua has no issue with 0-bytes in strings)
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mgr.inz.Player
I post too much
Reputation: 222
Joined: 07 Nov 2008
Posts: 4438
Location: W kraju nad Wisla. UTC+01:00
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| Posted: Fri Jan 30, 2015 5:05 pm Post subject: |
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| Quote: | | what do you need memorystream for ? |
Check test mp3.ct
| Code: | header = {
0x46464952,0x0000443B,0x45564157,0x20746D66,0x0000001E,0x00020055,
0x0000AC44,0x00001B58,0x00000001,0x0001000C,0x00000002,0x00010001,
0x61660571,0x00047463,0x2FF80000,0x61640014
} -- 44100Hz , Stereo
-- fix MemoryStream write, and add other useful methods
if oldcreateMemoryStream==nil then oldcreateMemoryStream = createMemoryStream end
function createMemoryStream()
local obj = oldcreateMemoryStream()
local oldwrite=obj.write
obj.write = function (t,n) -- override default write
local count=0
for _,v in ipairs(t) do
if count==n then break end
oldwrite({v},1)
count=count+1
end
end
obj.writeDword = function (v) obj.write(dwordToByteTable(v)) end
obj.writeWord = function (v) obj.write(wordToByteTable(v)) end
return obj
end
function convertMP3ToRIFFMP3(stream, stereo, rate)
local riffmp3 = createMemoryStream()
for i,v in ipairs(header) do repeat
if i==2 then riffmp3.writeDword(stream.Size+0x24) break end
riffmp3.writeDword(v)
until true end
riffmp3.writeWord(0x6174)
riffmp3.writeDword(stream.Size)
riffmp3.copyFrom(stream,stream.Size)
if stereo==false then riffmp3.Position = 0x16; riffmp3.writeWord(1) end
if tonumber(rate) then riffmp3.Position = 0x18; riffmp3.writeDword(rate) end
riffmp3.Position = riffmp3.Size - 1
return riffmp3
end
mp3stream = findTableFile([[shutdown.mp3]]).Stream
--convertMP3ToRIFFMP3(stream, stereo, rate)
--convertMP3ToRIFFMP3(stream) == convertMP3ToRIFFMP3(stream, true, 44100)
--convertMP3ToRIFFMP3(stream, false) == convertMP3ToRIFFMP3(stream, false, 44100)
if riffmp3stream==nil then riffmp3stream = convertMP3ToRIFFMP3(mp3stream) end
playSound(riffmp3stream, false)
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test mp3.ct (44100Hz, variable bitrate, 2 channels)= 23KB and test mp3.cetrainer = 18KB
test wav.ct (22050Hz, 2 channels)= 136KB
| Description: |
|
Download |
| Filename: |
test mp3.ct |
| Filesize: |
22.39 KB |
| Downloaded: |
542 Time(s) |
| Description: |
|
Download |
| Filename: |
test wav.ct |
| Filesize: |
135.94 KB |
| Downloaded: |
669 Time(s) |
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Dark Byte
Site Admin
Reputation: 471
Joined: 09 May 2003
Posts: 25831
Location: The netherlands
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| Posted: Fri Jan 30, 2015 5:47 pm Post subject: |
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ah nice
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Do not ask me about online cheats. I don't know any and wont help finding them.
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mgr.inz.Player
I post too much
Reputation: 222
Joined: 07 Nov 2008
Posts: 4438
Location: W kraju nad Wisla. UTC+01:00
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| Posted: Fri Jan 30, 2015 7:46 pm Post subject: |
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In previous CT it is:
| Code: | | convertMP3ToRIFFMP3(mp3stream) |
In this CT file, the same WAVE file was converted to MP3. This time with ffmpeg and
-ac 2 -ar 32000 -aq 9
Conversion to RIFFMP3:
| Code: | | convertMP3ToRIFFMP3(mp3stream,true,32000) |
Size: 12KB (CETRAINER: 9KB)
| Description: |
|
Download |
| Filename: |
test2 mp3.ct |
| Filesize: |
11.84 KB |
| Downloaded: |
661 Time(s) |
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