MVD Services

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Revision as of 22:21, 11 December 2014 by ILOVEPIE (talk | contribs) (added h.264 profile and level compatability chart)
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This is for using the MVD hardware video decoder(unknown whether MVD can do more than decoding) + hardware color-format converter. The New_3DS Internet Browser uses mvd:STD for video decoding + YUV2RGB for decoded MJPEG frames.

See here for the supported hardware decoder video codecs.

A maximum of 4 sessions can be opened at a time, for all of these services combined.

MVD Service "mvd:STD"

Command Header Available since system version Description
0x00010082 Initialize
0x00020000 Shutdown
0x00030300 CalculateWorkBufSize
0x00050100 (u8 unk0, u8 unk1, u8 unk2, u8 unk3) SKATER uses value 0 for all of these params.
0x00070000
0x00080142 DecodeFrame
0x00090042 (u8 unkval, val0, kprocess handle) This writes some state beginning at cmdreply[2]. unkval is normally 0, when preparing to shutdown MVD unkval is 1.
0x000A0000
0x00180000
0x00190000
0x001A0000 Used when doing color-format conversion.
0x001B0040 (u8 unknown) SKATER uses value 1 for this.
0x001C0000
0x001D0042 GetConfig
0x001E0044 SetConfig

This one uses the I/O mapped @ 0x10207000.

This service is used by the New_3DS Internet Browser.

By default MVD does(?) various post-processing with the output image, this is controlled by the configuration. This post-processing isn't done at all in certain cases. By default MVD will align the output frame width to 512, by writing zero-value pixels.

Initialization procedures:

Shutdown procedures:

  • MJPEG: just use command 0x00190000, then MVDSTD:Shutdown.
  • H.264: Use command 0x00090042 in a loop, waiting for it to return a retval that isn't 0x00017002. Then use commands 0x001C0000, 0x00190000, and 0x00070000. Then use MVDSTD:Shutdown.

MVD Service "l2b:u"

This one uses the I/O mapped @ 0x10130000.

MVD Service "l2b2:u"

This uses the same command-handler as "l2b:u".

MVD Service "y2r2:u"

This one uses the I/O mapped @ 0x10102000.

MVD Result-codes

Result-code Internal MVD status-code Description
0xD961710F Invalid configuration, mainly when setting the config.

Supported H.264 Levels and Profiles

Level Baseline Main High High 10 (High10, High10p, Hi10p or 10-bit H.264) High 4:2:2 (High422p or High422) High 4:4:4 Predictive (Hi444PP)
1 Yes Yes Yes Yes Unk Unk
1b Yes Yes Yes Yes Unk Unk
1.1 Yes Yes Yes Yes Unk Unk
1.2 Yes Yes Yes Yes Unk Unk
1.3 Yes Yes Yes Yes Unk Unk
2 Yes Yes Yes Yes Unk Unk
2.1 Yes Yes Yes Yes Unk Unk
2.2 Yes Yes Yes Yes Unk Unk
3 Yes Yes Yes Yes Unk Unk
3.1 Yes Yes Yes Yes Unk Unk
3.2 Yes Yes Yes Yes Unk Unk
4 No No No No No No
4.1 No No No No No No
4.2 No No No No No No
5 No No No No No No
5.1 No No No No No No
5.2 No No No No No No

created using the New 3DS Internet Browser, New 3DS Internet Browser Specs and the following test pages:
Baseline Profile Test
Main Profile Test
High Profile Test
High10 Profile Test