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| author | Takashi Iwai <tiwai@suse.de> | 2024-07-05 19:03:42 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2024-07-06 10:38:27 +0300 |
| commit | fefbbdfb59d3a20fd98734363e6dd9fa7cc65c70 (patch) | |
| tree | 061d4b19a5afb6974d1011e412edf6e0d0d39436 /sound/core/seq/seq_clientmgr.c | |
| parent | a892b700e63bcb3679ebed1a0c3160e7b9225138 (diff) | |
| download | linux-fefbbdfb59d3a20fd98734363e6dd9fa7cc65c70.tar.xz | |
ALSA: seq: Add tempo base unit for MIDI2 Set Tempo messages
MIDI2 Set Tempo message defines the tempo in 10ns unit for finer
accuracy, while MIDI1 was defined in 1us unit. For adapting this
different unit, introduce "tempo_base" field to snd_seq_queue_tempo
struct so that user-space can pass the proper tempo base unit.
The accepted value is limited, it must be either 0, 10 or 1000.
The protocol version is bumped to 1.0.4 along with this.
The access with the older protocol version ignores the tempo-base
value in ioctls and always treats as 1000.
Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Link: https://patch.msgid.link/20240705160344.6481-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/seq/seq_clientmgr.c')
| -rw-r--r-- | sound/core/seq/seq_clientmgr.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c index 42a705141050..8c4ee5066afe 100644 --- a/sound/core/seq/seq_clientmgr.c +++ b/sound/core/seq/seq_clientmgr.c @@ -1718,6 +1718,8 @@ static int snd_seq_ioctl_get_queue_tempo(struct snd_seq_client *client, tempo->ppq = tmr->ppq; tempo->skew_value = tmr->skew; tempo->skew_base = tmr->skew_base; + if (client->user_pversion >= SNDRV_PROTOCOL_VERSION(1, 0, 4)) + tempo->tempo_base = tmr->tempo_base; queuefree(queue); return 0; @@ -1739,6 +1741,8 @@ static int snd_seq_ioctl_set_queue_tempo(struct snd_seq_client *client, struct snd_seq_queue_tempo *tempo = arg; int result; + if (client->user_pversion < SNDRV_PROTOCOL_VERSION(1, 0, 4)) + tempo->tempo_base = 0; result = snd_seq_set_queue_tempo(client->number, tempo); return result < 0 ? result : 0; } |