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| author | Clemens Ladisch <clemens@ladisch.de> | 2014-11-25 22:54:10 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2015-01-16 22:51:23 +0100 |
| commit | 25ca917c0fcdd1d2c4a701905e11751275186310 (patch) | |
| tree | fb080f775928a406611e1ae7b0053bdf79aee5f1 /sound/firewire/amdtp.h | |
| parent | ALSA: firewire-lib: remove rx_blocks_for_midi quirk (diff) | |
| download | linux-25ca917c0fcdd1d2c4a701905e11751275186310.tar.xz linux-25ca917c0fcdd1d2c4a701905e11751275186310.zip | |
ALSA: firewire-lib: limit the MIDI data rate
Do no send MIDI bytes at the full rate at which FireWire packets happen
to be sent, but restrict them to the actual rate of a real MIDI port.
This is required by the specification, and prevents data loss when the
device's buffer overruns.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Tested-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire/amdtp.h')
| -rw-r--r-- | sound/firewire/amdtp.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sound/firewire/amdtp.h b/sound/firewire/amdtp.h index cd4c4dfb3951..8a03a91e728b 100644 --- a/sound/firewire/amdtp.h +++ b/sound/firewire/amdtp.h @@ -148,6 +148,8 @@ struct amdtp_stream { bool double_pcm_frames; struct snd_rawmidi_substream *midi[AMDTP_MAX_CHANNELS_FOR_MIDI * 8]; + int midi_fifo_limit; + int midi_fifo_used[AMDTP_MAX_CHANNELS_FOR_MIDI * 8]; /* quirk: fixed interval of dbc between previos/current packets. */ unsigned int tx_dbc_interval; |