OBD:SNDD/aif: Difference between revisions
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m (todo: double-check the sample frame and bps) |
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In the Mac version Oni uses the AIFC sound format. The header of this format is detailed below. Note the [[wikipedia:Big_Endian|Big Endian]] order. | |||
| Line 10: | Line 10: | ||
{{Table}} | {{Table}} | ||
{{OBDth}} | {{OBDth}} | ||
{{OBDtrBK| | {{OBDtrBK|AIFC format header (black outline)}} | ||
{{OBDtr| 0x10 | int32 |FFC8C8| 00 00 00 16 | 22 | size of the following complete header part in bytes }} | {{OBDtr| 0x10 | int32 |FFC8C8| 00 00 00 16 | 22 | size of the following complete header part in bytes }} | ||
{{OBDtr| 0x14 | int16 |FFFFC8| 00 01 | 1 | number of channels (1 <nowiki>=</nowiki> mono) }} | {{OBDtr| 0x14 | int16 |FFFFC8| 00 01 | 1 | number of channels (1 <nowiki>=</nowiki> mono) }} | ||
{{OBDtr| 0x16 | int32 |C8FFC8| 00 00 01 3F | 319 | [[image:sndd_hm1.gif]] }} | {{OBDtr| 0x16 | int32 |C8FFC8| 00 00 01 3F | 319 | [[image:sndd_hm1.gif]] }} | ||
{{OBDtr| 0x1A | int16 |C8FFFF| 00 10 | 16 | bits per sample }} | {{OBDtr| 0x1A | int16 |C8FFFF| 00 10 | 16 | bits per sample }} | ||
{{OBDtr| 0x1C | float80 |FFC8FF| 40 0D AC... | 22050 | samples per second | {{OBDtr| 0x1C | float80 |FFC8FF| 40 0D AC... | 22050 | samples per second (a.k.a. "frequency" or "sample rate") | ||
(it's an 80 bit "IEEE Standard 754" floating point number) }} | |||
{{OBDtr| 0x26 | char[4] |FFC800| 69 6D 61 34 | ima4 | compression type }} | {{OBDtr| 0x26 | char[4] |FFC800| 69 6D 61 34 | ima4 | compression type }} | ||
|} | |} | ||
;Note | |||
:The Mac versions use only one sample rate: 22.05 kHz. | |||
:The number of channels is specified in the .dat part. | |||
:Not sure for the "bits per sample" and "sample frame". | |||
<center>[[OBD:SNDD#PC_demo_and_Mac|Back to Mac SNDD (.dat part)]]</center> | |||
<center>[[OBD: | |||
Revision as of 21:12, 18 November 2007
In the Mac version Oni uses the AIFC sound format. The header of this format is detailed below. Note the Big Endian order.
| Offset | Type | Raw Hex | Value | Description |
|---|---|---|---|---|
| AIFC format header (black outline) | ||||
| 0x10 | int32 | 00 00 00 16 | 22 | size of the following complete header part in bytes |
| 0x14 | int16 | 00 01 | 1 | number of channels (1 = mono) |
| 0x16 | int32 | 00 00 01 3F | 319 | File:Sndd hm1.gif |
| 0x1A | int16 | 00 10 | 16 | bits per sample |
| 0x1C | float80 | 40 0D AC... | 22050 | samples per second (a.k.a. "frequency" or "sample rate")
(it's an 80 bit "IEEE Standard 754" floating point number) |
| 0x26 | char[4] | 69 6D 61 34 | ima4 | compression type |
- Note
- The Mac versions use only one sample rate: 22.05 kHz.
- The number of channels is specified in the .dat part.
- Not sure for the "bits per sample" and "sample frame".