MIDI2 Set Tempo message uses 10ns-based values, and we need to update
the API to change the base time unit.
This patch adds a few new API functions:
- snd_seq_has_queue_tempo_base() returns 1 if the client supports a
new tempo-base value; if 0, it's an old system and application has
to use the tempo in the fixed 1us unit
- the tempo base can be changed with
snd_seq_queue_tempo_set_tempo_base(), provided in nsec unit;
the value has to be either 10 or 1000 (or 0 as default, equivalent
with 1000)
The protocol version is checked and fallback to the fixed 1us base for
the old clients.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Add a helper function to return the number of words of a given UMP
packet type. Used for parsing MIDI Clip File stream, for example.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Configure script allows for the disabling of the pcm module. When
disabled, the pcm symbols will not be available. Add guards to remove
symbols from version map when not present.
Closes: https://github.com/alsa-project/alsa-lib/pull/376
Signed-off-by: Nicholas Vinson <nvinson234@gmail.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
