Paul Davis
4abbabdcf9
commit fdbae82077db53add90df7448a06869dac89acc6
Author: Paul Davis <paul@linuxaudiosystems.com>
Date: Wed Mar 27 21:45:28 2013 -0400
mammoth changes in basic signal flow, total redesign of MIDI channel filtering and more.
commit 59343a8283698e02bc0f622313b29e98f449e4c8
Author: Paul Davis <paul@linuxaudiosystems.com>
Date: Wed Mar 27 01:58:53 2013 -0400
initial working version after changes to MIDI channel filtering. may affect metering input too. testing not yet finished
this commit merges many deep changes in ardour's internal architecture,
combined with a total redesign of how MIDI channel filtering works.
data in a track used to flow from JACK port buffers to diskstream's ringbuffers
and was then copied from the ringbuffers into a BufferSet for use during
Route::process_output_buffers(). The butler thread would handle the movement of
data between the ringbuffers and disk.
with this commit, data now flows from JACK port buffers into the BufferSet used
for Route processing, and is copied from the BufferSet into the diskstream's
ringbuffers (the butler thread continues to handle interactions with disk as
usual).
this change allowed a dramatic consolidation of code and simplification of most
aspects of Track/Route::roll() and Track/Route::no_roll(). in particular, see
Route::fill_buffers_with_input() which now concisely describes how we move data
from JACK port buffers into the BufferSet for all Route types (including Tracks).
this work was initially motivated by changing MIDI channel filtering so that we
can process capture and playback independently. there is now a very clean
pathway for this - see MidiTrack::roll() (NOTE: This needs implementing in the
no-roll case too - a TODO item).
the channel selector for MIDI tracks has been moved out of the track header and
is now accessible via the context menu. more work is likely here, to make it
(more) obvious to the user when filtering is going on.
80 lines
1.7 KiB
C++
80 lines
1.7 KiB
C++
/*
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Copyright (C) 2006-2007 Paul Davis
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <errno.h>
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#include "ardour/audio_buffer.h"
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#include "pbd/error.h"
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#include "pbd/malign.h"
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#include "i18n.h"
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using namespace PBD;
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using namespace ARDOUR;
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AudioBuffer::AudioBuffer(size_t capacity)
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: Buffer(DataType::AUDIO, capacity)
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, _owns_data (false)
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, _data (0)
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{
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if (_capacity > 0) {
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_owns_data = true; // prevent resize() from gagging
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resize (_capacity);
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_silent = false; // force silence on the intial buffer state
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silence (_capacity);
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}
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}
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AudioBuffer::~AudioBuffer()
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{
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if (_owns_data)
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free(_data);
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}
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void
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AudioBuffer::resize (size_t size)
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{
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if (!_owns_data) {
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return;
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}
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if (size < _capacity) {
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_size = size;
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return;
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}
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free (_data);
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_capacity = size;
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_size = size;
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_silent = false;
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cache_aligned_malloc ((void**) &_data, sizeof (Sample) * _capacity);
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}
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bool
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AudioBuffer::check_silence (pframes_t nframes, pframes_t& n) const
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{
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for (n = 0; n < _size && n < nframes; ++n) {
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if (_data[n] != Sample (0)) {
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return false;
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}
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}
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return true;
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}
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