ardour/livetrax
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Add API to query SMF note-count and pgm-changes

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This information is useful for trigger-clips, in particular
if the file can change synth-settings via patch-changes.
This commit is contained in:
Robin Gareus 2022-02-05 13:03:16 +01:00
parent 220b1386ab
commit 207ad2d369
Signed by: rgareus
GPG Key ID: A090BCE02CF57F04
2 changed files with 20 additions and 1 deletions
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15
libs/evoral/SMF.cc
View File

@ -125,7 +125,9 @@ SMF::open(const std::string& path, int track)
{
Glib::Threads::Mutex::Lock lm (_smf_lock);
_num_channels = 0;
_num_channels = 0;
_n_note_on_events = 0;
_has_pgm_change = false;
_used_channels.clear ();
assert(track >= 1);
@ -185,8 +187,19 @@ 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_channels.insert(chan);
switch (type) {
case MIDI_CMD_NOTE_ON:
++_n_note_on_events;
break;
case MIDI_CMD_PGM_CHANGE:
_has_pgm_change = true;
break;
default:
break;
}
}
}
_num_channels += _used_channels.size();

6
libs/evoral/evoral/SMF.h
View File

@ -87,8 +87,11 @@ public:
double round_to_file_precision (double val) const;
int smf_format () const;
int num_channels () const { return _num_channels; }
std::set<uint8_t> const& used_channels () const { return _used_channels; }
uint64_t n_note_on_events () const { return _n_note_on_events; }
bool has_pgm_change () const { return _has_pgm_change; }
void track_names (std::vector<std::string>&) const;
void instrument_names (std::vector<std::string>&) const;
@ -140,6 +143,9 @@ public:
int _num_channels;
std::set<uint8_t> _used_channels;
uint64_t _n_note_on_events;
bool _has_pgm_change;
mutable Markers _markers;
};