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| author | Takashi Iwai <tiwai@suse.de> | 2024-07-05 18:03:42 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2024-07-06 09:38:27 +0200 |
| commit | fefbbdfb59d3a20fd98734363e6dd9fa7cc65c70 (patch) | |
| tree | 061d4b19a5afb6974d1011e412edf6e0d0d39436 /sound/core/seq/seq_queue.c | |
| parent | ALSA: pcm: Fix id copying in snd_pcm_set_sync_per_card() (diff) | |
| download | linux-fefbbdfb59d3a20fd98734363e6dd9fa7cc65c70.tar.gz linux-fefbbdfb59d3a20fd98734363e6dd9fa7cc65c70.zip | |
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_queue.c')
| -rw-r--r-- | sound/core/seq/seq_queue.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/sound/core/seq/seq_queue.c b/sound/core/seq/seq_queue.c index 500ee6b19c71..5df26788dda4 100644 --- a/sound/core/seq/seq_queue.c +++ b/sound/core/seq/seq_queue.c @@ -460,7 +460,8 @@ int snd_seq_queue_timer_set_tempo(int queueid, int client, return -EPERM; } - result = snd_seq_timer_set_tempo_ppq(q->timer, info->tempo, info->ppq); + result = snd_seq_timer_set_tempo_ppq(q->timer, info->tempo, info->ppq, + info->tempo_base); if (result >= 0 && info->skew_base > 0) result = snd_seq_timer_set_skew(q->timer, info->skew_value, info->skew_base); @@ -724,7 +725,7 @@ void snd_seq_info_queues_read(struct snd_info_entry *entry, tmr = q->timer; if (tmr->tempo) - bpm = 60000000 / tmr->tempo; + bpm = (60000 * tmr->tempo_base) / tmr->tempo; else bpm = 0; @@ -741,6 +742,7 @@ void snd_seq_info_queues_read(struct snd_info_entry *entry, snd_iprintf(buffer, "timer state : %s\n", tmr->running ? "Running" : "Stopped"); snd_iprintf(buffer, "timer PPQ : %d\n", tmr->ppq); snd_iprintf(buffer, "current tempo : %d\n", tmr->tempo); + snd_iprintf(buffer, "tempo base : %d ns\n", tmr->tempo_base); snd_iprintf(buffer, "current BPM : %d\n", bpm); snd_iprintf(buffer, "current time : %d.%09d s\n", tmr->cur_time.tv_sec, tmr->cur_time.tv_nsec); snd_iprintf(buffer, "current tick : %d\n", tmr->tick.cur_tick); |