3dbrew

DSP Memory Region: Difference between revisions

← Older editNewer edit →
Merry (talk | contribs)
50 edits
mNo edit summary
Merry (talk | contribs)
50 edits
Added Channel Context
Line 84: Line 84:
| 0x2
| 0x2
| Frame Counter
| Frame Counter
|}
== Channel Config ==
A 192 byte long structure. There are 24 of them.
{| class="wikitable"
|-
| Offset
| Type
| Description
|-
| 0
| u32
| Dirty flags
|-
| 4
| 70 bytes
| TODO
|-
| 74
| u16
| Bitmap of which buffers in queue are valid
|-
| 76
| Buffer[4]
| Buffer queue
|-
| 156
| u32
| -
|-
| 160
| u16
| Is Active
|-
| 162
| u16
| Config Serial Number (Userland)
|-
| 164
| 8
| TODO
|-
| 172
| u32
| Physical address of current buffer
|-
| 176
| u32
| Number of samples in current buffer
|-
| 180
| u16
| bits[0:1]: 1 = mono, 2 = stereo; bits[2:3]: buffer format
|-
| 182
| u16
| ADPCM predictor
|-
| 184
| s16
| ADPCM yn1
|-
| 186
| s16
| ADPCM yn2
|-
| 188
| u16
| bit[0]: Has ADPCM data?; bit[1]: Is looping?
|-
| 190
| u16
| Buffer Id of this current buffer
|}
=== Buffer ===
{| class="wikitable"
|-
| Offset
| Type
| Description
|-
| 0
| u32
| Physical Address
|-
| 4
| u32
| Sample Count
|-
| 8
| u16
| ADPCM P/S
|-
| 10
| s16[2]
| ADPCM yn[1,2]
|-
| 14
| u8
| Has ADPCM?
|-
| 15
| u8
| Looping?
|-
| 16
| u16
| Buffer Id
|-
| 18
| u16
| -
|}
|}
Retrieved from "https://www.3dbrew.org/wiki/DSP_Memory_Region"