Trusted
21
edits
Changes
no edit summary
''Note that everything below may vary depending on the exact DSP firmware used and different variants have slightly different behaviours.''
''Note that everything below may vary depending on the exact DSP firmware used and different variants have slightly different behaviours.''
''Also note that some things about the AAC firmware still need to be properly tested and/or reverse engineered.''
=Summary=
=Summary=
|-
|-
| SaveState
| SaveState
| 4
|}
=Request/Response Data=
The 24-byte "request/response data" chunk can take on one of the formats listed below, depending on what sort of message it's found in.
'''AAC Decode command response'''
Size : 24 bytes
{| class="wikitable" border="1"
|-
! Offset in bytes
! Type
! Description
|-
| 0x0
| enum SampleRate
| Sample rate of the decoded AAC stream (Note: This is an enum, NOT a numerical value for the sample rate)
|-
| 0x4
| u32
| Channel count (?)
|-
| 0x8
| u32
| Size
|-
| 0xC
| u32
| Unknown?
|-
| 0x10
| u32
| Unknown?
|-
| 0x14
| u32
| Number of decoded samples (?)
|-
|}
=Sample rate enum=
'''enum SampleRate : u32'''
{| class="wikitable" border="1"
|-
! Enum
! Value
|-
| 48000Hz (48KHz)
| 0
|-
| 44100Hz (44.1KHz)
| 1
|-
| 32000Hz (32KHz)
| 2
|-
| 24000Hz (24KHz)
| 3
| 3
|-
| 22050Hz (22.05KHz)
| 4
|-
| 16000Hz (16KHz)
| 5
|-
| 12000Hz (12KHz)
| 6
|-
| 11025Hz (11.025KHz)
| 7
|-
| 8000Hz (8KHz)
| 8
|-
|}
|}