104
edits
Changes
→Sound data section
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+I have yet to figure out the sound decoding...--[[User:Pbsds|pbsds]] 17:38, 6 June 2010 (UTC)+
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/private/ds/app/4B475556/001 - European location
/private/ds/app/4B475556/001 - European location
+/private/ds/app/4B475545/001 - North American location
You can save your images in a user folder as long as it's on the same level as the 001 folder. Clicking on the Choose Folder icon on the top of the View Flipnote / SD Card option gives you a list of normal folders, and you can swap to user folders by selecting the normal button again. This could possibly be to overcome a limitation in one of the files (possibly the dirmemo2.lst file).
You can save your images in a user folder as long as it's on the same level as the 001 folder. Clicking on the Choose Folder icon on the top of the View Flipnote / SD Card option gives you a list of normal folders, and you can swap to user folders by selecting the normal button again. This could possibly be to overcome a limitation in one of the files (possibly the dirmemo2.lst file).
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|-
|-
| 0000
| 0000
−| 4
+| 2
| Size of the offset table
| Size of the offset table
+|-
+| 0002
+| 2
+| Padding
|-
|-
| 0004
| 0004
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if( useByte == 0 ) // Set the full line to the current paper colour
if( useByte == 0 ) // Set the full line to the current paper colour
+ {
memset( outB, paper, 256 );
memset( outB, paper, 256 );
+ }
else // Bytes in this line, read and deal with them
else // Bytes in this line, read and deal with them
{
{
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{
{
if( ( data & 0x01 ) == 0x01 )
if( ( data & 0x01 ) == 0x01 )
+ {
outB[ x ] = invflag == 0 ? pen : paper;
outB[ x ] = invflag == 0 ? pen : paper;
+ }
else
else
+ {
outB[ x ] = invflag == 0 ? paper : pen;
outB[ x ] = invflag == 0 ? paper : pen;
− }
x ++;
x ++;
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if( x < 256 )
if( x < 256 )
+ {
memset( &outB[ x ], paper, 256 - x );
memset( &outB[ x ], paper, 256 - x );
+ }
}
}
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|- style="background-color: #ddd;"
|- style="background-color: #ddd;"
! Length
! Length
+! Function
! Description
! Description
|-
|-
−| Frame count
+| Framecount
−| Sound effect usage. Each byte represents a frame, and bit #1 represents Sound effect 1, bit #2 represents Sound effect 2 and bit #3 represents Sound effect 3.
+| Sound effect usage.
+| Each byte represents a frame. bit #1(from Right to Left) represents Sound effect 1, bit #2 represents Sound effect 2 and bit #3 represents Sound effect 3. the last 5 bits is padding.
|-
|-
| 0 - 3
| 0 - 3
−| Padding - Makes the offset to the next four bytes dividable by 4
+| Padding
+| 0x00 * (0 to 3). Makes the offset to the next value dividable by 4.
|-
|-
| 4
| 4
−| Size of Background music(0x0000000 if not used)
+| Size of the background music.
+| The size of the background music in bytes in the audio data below. 0x0 if not used/empty.
|-
|-
| 4
| 4
−| Size of Sound effect 1(0x0000000 if not used)
+| Size of sound effect #1
+| The size of the sound effect #1 in bytes in the audio data below, max size is 0x2000. 0x0 if not used/empty.
|-
|-
| 4
| 4
−| Size of Sound effect 2(0x0000000 if not used)
+| Size of sound effect #2
+| The size of the sound effect #3 in bytes in the audio data below, max size is 0x2000. 0x0 if not used/empty.
|-
|-
| 4
| 4
−| Size of Sound effect 3(0x000000 if not used)
+| Size of sound effect #3
+| The size of the sound effect #3 in bytes in the audio data below, max size is 0x2000. 0x0 if not used/empty.
+|-
+| 1
+| Current Framespeed.
+| This is the speed of the flipnote. It's in the range of 1-8. To get the correct value, you must take 8, and subtract the decimal value of this byte.
|-
|-
| 1
| 1
−| Framerate. To get the correct value, you must take 8, and subtract the decimal value of this byte.
+| Given Framespeed when BGM was recorded.
+| This is the speed of the flipnote when the BGM was recorded/modified. It's in the range of 1-8. This is used to resample the sound to the new speed. To get the correct value, you must take 8, and subtract the decimal value of this byte.
|-
|-
−| 15
+| 14
−| Unknown - Used for sound decoding? (samplerate, compression, etc)
+| Padding
+| 0x00 * 14
|}
|}
−Then comes the audio data.
+*First comes the BGM(if used)
+*Then comes sound effect #1(if used)
+*Then comes sound effect #2(if used)
+*Then comes sound effect #3(if used)
+The sound data is 4bit ADPCM with reversed nibbles @ 8kHz.
+You can decode the sound yourself with "sox -t ima -N [input] [output]"
+==Signature==
+The last 0x10-bytes in a PPM are all-zero. The 0x80 bytes before that is a RSA-1024 SHA-1 signature over the whole PPM, excluding the last 0x90 bytes with the signature.