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For capturing/playbacking MIDI messages, this commit adds one MIDI conformant data channel. This data channel has multiplexed 8 MIDI data streams. So this data channel can transfer messages from/to 8 MIDI ports. And this commit allows to set PCM format even if AMDTP streams already start. I suppose the case that PCM substreams are going to be joined into AMDTP streams when AMDTP streams are already started for MIDI substreams. Each driver must count how many PCM/MIDI substreams use AMDTP streams to stop AMDTP streams. There are differences between specifications about MIDI conformant data. About the multiplexing, IEC 61883-6:2002, itself, has no information. It describes labels and bytes for MIDI messages and refers to MMA/AMEI RP-027 for 'successfull implementation'. MMA/AMEI RP-027 describes 8 MPX-MIDI data streams for one MIDI conformant data channel. IEC 61883-6:2005 adds 'sequence multiplexing' and apply this way and describe incompatibility between 2002 and 2005. So this commit applies IEC 61883-6:2005. When we find some devices compliant to IEC 61883-6:2002, then this difference should be handles as device quirk in additional work. About the number of bytes in an MIDI conformant data, IEC 61883-6:2002 describe 0,1,2,3 bytes. MMA/AMEI RP-027 describes 'MIDI1.0-1x-SPEED', 'MIDI1.0-2x-SPEED', 'MIDI1.0-3x-SPEED' modes and the maximum bytes for each mode corresponds to 1, 2, 3 bytes. The 'MIDI1.0-2x/3x-SPEED' modes are accompanied with 'negotiation procedure' and 'encapsulation details' but there is no specifications for them. So this commit implements 'MIDI1.0-1x-SPEED' mode for playback, but allows to pick up 1-3 bytes for capturing. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de> |
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| .. | ||
| amdtp.c | ||
| amdtp.h | ||
| cmp.c | ||
| cmp.h | ||
| dice-interface.h | ||
| dice.c | ||
| fcp.c | ||
| fcp.h | ||
| isight.c | ||
| iso-resources.c | ||
| iso-resources.h | ||
| Kconfig | ||
| lib.c | ||
| lib.h | ||
| Makefile | ||
| packets-buffer.c | ||
| packets-buffer.h | ||
| scs1x.c | ||
| speakers.c | ||