MidiBuffer: allow for partial processing with offset
AudioBuffer::read_from() only replaces data within the given range (offset .. n_samples + offset) leaving the rest of the buffer untouched. With in-place processing, where the same MIDI buffer is used for input and output, each sub-cycle must only clear the processed range, while leaving the rest of the buffer untouched.
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@ -43,6 +43,7 @@ public:
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MidiBuffer(size_t capacity);
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~MidiBuffer();
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void clear();
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void silence (samplecnt_t nframes, samplecnt_t offset = 0);
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void read_from (const Buffer& src, samplecnt_t nframes, sampleoffset_t dst_offset = 0, sampleoffset_t src_offset = 0);
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void merge_from (const Buffer& src, samplecnt_t nframes, sampleoffset_t dst_offset = 0, sampleoffset_t src_offset = 0);
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@ -152,8 +153,9 @@ public:
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size_t total_data_deleted = align32 (sizeof(TimeType) + sizeof (Evoral::EventType) + event_size);
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if (i.offset + total_data_deleted > _size) {
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if (i.offset + total_data_deleted >= _size) {
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_size = 0;
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_silent = true;
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return end();
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}
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@ -167,6 +169,8 @@ public:
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_size -= total_data_deleted;
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assert (_size > 0);
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/* all subsequent iterators are now invalid, and the one we
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* return should refer to the event we copied, which was after
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* the one we just erased.
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@ -96,7 +96,6 @@ MidiBuffer::copy(MidiBuffer const * const copy)
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memcpy(_data, copy->_data, _size);
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}
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void
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MidiBuffer::read_from (const Buffer& src, samplecnt_t nframes, sampleoffset_t dst_offset, sampleoffset_t src_offset)
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{
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@ -107,21 +106,13 @@ MidiBuffer::read_from (const Buffer& src, samplecnt_t nframes, sampleoffset_t ds
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assert (_capacity >= msrc.size());
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clear ();
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assert (_size == 0);
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MidiBuffer::silence (nframes, dst_offset);
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for (MidiBuffer::const_iterator i = msrc.begin(); i != msrc.end(); ++i) {
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const Evoral::Event<TimeType> ev(*i, false);
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if (ev.time() >= src_offset && ev.time() < nframes + src_offset) {
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push_back (ev.time() + dst_offset - src_offset, ev.event_type (), ev.size(), ev.buffer());
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} else {
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cerr << "\t!!!! MIDI event @ " << ev.time()
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<< " skipped, not within range. nframes: " << nframes
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<< " src_offset: " << src_offset
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<< " dst_offset: " << dst_offset
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<< "\n";
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PBD::stacktrace (cerr, 30);
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}
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}
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@ -299,18 +290,34 @@ MidiBuffer::reserve(TimeType time, Evoral::EventType event_type, size_t size)
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return write_loc;
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}
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void
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MidiBuffer::silence (samplecnt_t /*nframes*/, samplecnt_t /*offset*/)
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MidiBuffer::clear ()
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{
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/* XXX iterate over existing events, find all in range given by offset & nframes,
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and delete them.
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*/
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_size = 0;
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_silent = true;
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}
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void
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MidiBuffer::silence (samplecnt_t nframes, samplecnt_t offset)
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{
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/* iterate over existing events, find all in range given by offset & nframes,
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* and delete them.
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*/
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if (nframes == _capacity && offset == 0) {
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MidiBuffer::clear ();
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return;
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}
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for (MidiBuffer::iterator i = begin(); i != end();) {
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const Evoral::Event<TimeType> ev(*i, false);
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if (ev.time() >= offset && ev.time() < nframes + offset) {
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i = erase (i);
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} else {
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++i;
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}
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}
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}
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bool
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MidiBuffer::second_simultaneous_midi_byte_is_first (uint8_t a, uint8_t b)
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{
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