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Add API to query set of used MIDI channels in a SMF

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This commit is contained in:
Robin Gareus 2022-02-05 00:06:19 +01:00
parent fa29647246
commit 12e8235193
Signed by: rgareus
GPG Key ID: A090BCE02CF57F04
2 changed files with 6 additions and 2 deletions
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5
libs/evoral/SMF.cc
View File

@ -126,6 +126,7 @@ SMF::open(const std::string& path, int track)
Glib::Threads::Mutex::Lock lm (_smf_lock);
_num_channels = 0;
_used_channels.clear ();
assert(track >= 1);
if (_smf) {
@ -185,10 +186,10 @@ SMF::open(const std::string& path, int track)
uint8_t type = buf[0] & 0xf0;
uint8_t chan = buf[0] & 0x0f;
if (type >= 0x80 && type <= 0xE0) {
used.insert(chan);
_used_channels.insert(chan);
}
}
_num_channels += used.size();
_num_channels += _used_channels.size();
free (buf);
}

3
libs/evoral/evoral/SMF.h
View File

@ -88,6 +88,8 @@ public:
int smf_format () const;
int num_channels () const { return _num_channels; }
std::set<uint8_t> const& used_channels () const { return _used_channels; }
void track_names (std::vector<std::string>&) const;
void instrument_names (std::vector<std::string>&) const;
@ -136,6 +138,7 @@ public:
mutable Glib::Threads::Mutex _smf_lock;
int _num_channels;
std::set<uint8_t> _used_channels;
mutable Markers _markers;
};