DSP Memory Region: Difference between revisions
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Added Channel Context |
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| 0x2 | | 0x2 | ||
| Frame Counter | | Frame Counter | ||
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== 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 | |||
| - | |||
|} | |} | ||