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midiin_device: support loading sysex dumps (#11625)

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Devin Acker 2023-10-20 19:21:52 -04:00 committed by GitHub
parent 6f1abb6222
commit 64bc63a655
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 33 additions and 5 deletions
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35
src/devices/imagedev/midiin.cpp
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@ -470,10 +470,8 @@ std::error_condition midiin_device::midi_sequence::parse(util::random_read &stre
// catch errors to make parsing easier
try
{
// if not a RIFF-encoed MIDI, just parse as-is
if (buffer.dword_le() != fourcc_le("RIFF"))
parse_midi_data(buffer.reset());
else
const u32 type = buffer.dword_le();
if (type == fourcc_le("RIFF"))
{
// check the RIFF type and size
u32 riffsize = buffer.dword_le();
@ -495,6 +493,11 @@ std::error_condition midiin_device::midi_sequence::parse(util::random_read &stre
}
}
}
else if ((u8)type == 0xf0)
parse_sysex_data(buffer.reset());
else
parse_midi_data(buffer.reset());
m_iterator = m_list.begin();
return std::error_condition();
}
@ -639,3 +642,27 @@ u32 midiin_device::midi_sequence::parse_track_data(midi_parser &buffer, u32 star
}
return curtick;
}
//-------------------------------------------------
// parse_sysex_data - parse a sysex dump into a
// single MIDI event
//-------------------------------------------------
void midiin_device::midi_sequence::parse_sysex_data(midi_parser &buffer)
{
u32 msg = 0;
attotime curtime;
while (!buffer.eob())
{
midi_event &event = event_at(msg++);
event.set_time(curtime);
u8 data = 0;
while (!buffer.eob() && data != 0xf7)
event.append(data = buffer.byte());
// add 100 ms between the end of this sysex and the start of the next one, if there is one
curtime += attotime::from_ticks((u64)10 * event.data().size(), 31250)
+ attotime::from_msec(100);
}
}

3
src/devices/imagedev/midiin.h
View File

@ -45,7 +45,7 @@ public:
virtual bool is_writeable() const noexcept override { return false; }
virtual bool is_creatable() const noexcept override { return false; }
virtual bool is_reset_on_load() const noexcept override { return false; }
virtual const char *file_extensions() const noexcept override { return "mid"; }
virtual const char *file_extensions() const noexcept override { return "mid,syx"; }
virtual bool core_opens_image_file() const noexcept override { return false; }
virtual const char *image_type_name() const noexcept override { return "midiin"; }
virtual const char *image_brief_type_name() const noexcept override { return "min"; }
@ -173,6 +173,7 @@ private:
midi_event &event_at(u32 tick);
u32 parse_track_data(midi_parser &buffer, u32 start_tick);
void parse_midi_data(midi_parser &buffer);
void parse_sysex_data(midi_parser &buffer);
// internal state
std::list<midi_event> m_list;