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This is mainly a NO-OP, introducing a new PlaybackBuffer type
and preparing for its use.
At this point in time, the buffer is just a power-of-two sized
ringbuffer and the disk-reader's read-logic is still unchanged.
Eventually the read and write sample position that are currently
private to the disk-reader can be migrated to be owned by the buffer.
Also Diskreader::read() positions can be matched to read-position ..
+/- buffer reservation and de-click can read w/o committing the read.
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Editor::insert_time(), Editor::remove_time() handle automation
directly because time may be inserted to Routes without playlists
and combined undo-operation with marker, and tempo-changes.
However when the preference "automation_follows_regions" is enabled,
the playlist already moves the automation of region under any region
(possibly overriding future automation).
This resulted in possibly lossy, duplicate automation moves.
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This fixes a memory-leak (_midi_buf was allocated in DiskIOProc
but only delete in DiskReader). Also skip midi-refill early on
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::speed_and_position() implementation
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This is in preparation to replace the Ringbuffer and avoid over-using
"buf" as variable (it's already used for vectors, as parameter name and
Audiobuffers.
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This allows to use different types for write and read buffers, in
preparation for a dedicated reader-buffer.
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De-click will be per disk-reader, latency compensated and buffer-size
independent. Cue-monitoring should not be affected by de-click.
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The processors will becomes responsible to know about loop-positions
and map latency-compensated start_sample, end_sample into the loop-range
as needed.
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MIDI disk reading
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* Processor implement get_state(), classes derived from Processor
implement protected ::state() -- as documented in processor.h
* likewise for Route, Track: make ::state() a protected interface
* removal of "full_state", use explicit "template_save"
* use RAII/Unwind to skip saving automation-state
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gui_feed_buffer is used for DiskWriter -> GUI notifications.
It was wrongly migrated from MidiDiskstream to DiskReader in 7fb6807
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* use start/end frame
* differentiate nframes and disk_samples_to_consume
* add global Port::port_offset () when writing data.
* add a note about b0rked vari-speed ..
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Doing so may clear out-of-band data which is injected into the
data-stream.
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The general goal is to align transport-sample to be the audible frame
and use that as "anchor" for all processing.
transport_sample cannot become negative (00:00:00:00 is the first audible
frame).
Internally transport pre-rolls (read-ahead) before the transport starts
to move. This allows inputs and disk to prefill the pipeline.
When starting to roll, the session counts down a global "remaning preroll"
counter, which is the worst-latency from in-to-out.
Each route in turn will start processing at its own output-latency.
Route::process_output_buffers() - which does the actual processing
incl disk i/o - begins by offsetting the "current sample" by the
route's process-latency and decrements the offset for each latent
processor. At the end of the function the output will be aligned
and match transport-sample - downstream-playback-latency (if any).
PS. This commit is a first step only: transport looping & vari-speed have
not yet been implemented/updated.
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It was not working in sdio/6.0-pre anyway and with upcoming changes to
latency compensation the concept of per disk[stream/reader] will go away.
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"i18n.h" needs to be included last, after types have been defined or
clang bails out:
"call to function 'operator<<' is not visible in the template definition"
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_roll_delay to expire
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it matters)
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This reverts commit 92c2e06eb72950f91ca943a5219e2caeaeecda9f.
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Generated by tools/f2s. Some hand-editing will be required in a few places to fix up comments related to timecode
and video in order to keep the legible
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implementation of DiskIOPoint
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contexts
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is needed); split into by-type array to deal with different rate of audio & MIDI i/o
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with respect to all DiskReaders
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