Paul Davis
7e845c53ab
git-svn-id: svn://localhost/ardour2/trunk@1214 d708f5d6-7413-0410-9779-e7cbd77b26cf
415 lines
8.5 KiB
C++
415 lines
8.5 KiB
C++
/*
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Copyright (C) 2000-2006 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: diskstream.cc 567 2006-06-07 14:54:12Z trutkin $
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*/
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#include <fstream>
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#include <cassert>
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#include <cstdio>
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#include <unistd.h>
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#include <cmath>
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#include <cerrno>
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#include <string>
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#include <climits>
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#include <fcntl.h>
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#include <cstdlib>
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#include <ctime>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include <sigc++/bind.h>
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#include <pbd/error.h>
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#include <pbd/basename.h>
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#include <glibmm/thread.h>
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#include <pbd/xml++.h>
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#include <ardour/ardour.h>
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#include <ardour/audioengine.h>
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#include <ardour/diskstream.h>
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#include <ardour/utils.h>
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#include <ardour/configuration.h>
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#include <ardour/audiofilesource.h>
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#include <ardour/destructive_filesource.h>
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#include <ardour/send.h>
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#include <ardour/playlist.h>
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#include <ardour/cycle_timer.h>
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#include <ardour/region.h>
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#include "i18n.h"
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#include <locale.h>
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using namespace std;
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using namespace ARDOUR;
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using namespace PBD;
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/* XXX This goes uninitialized when there is no ~/.ardour2 directory.
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* I can't figure out why, so this will do for now (just stole the
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* default from configuration_vars.h). 0 is not a good value for
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* allocating buffer sizes..
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*/
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nframes_t Diskstream::disk_io_chunk_frames = 1024 * 256;
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sigc::signal<void> Diskstream::DiskOverrun;
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sigc::signal<void> Diskstream::DiskUnderrun;
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Diskstream::Diskstream (Session &sess, const string &name, Flag flag)
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: _name (name)
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, _session (sess)
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{
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init (flag);
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}
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Diskstream::Diskstream (Session& sess, const XMLNode& node)
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: _session (sess)
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{
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init (Recordable);
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}
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void
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Diskstream::init (Flag f)
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{
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_flags = f;
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_io = 0;
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_alignment_style = ExistingMaterial;
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_persistent_alignment_style = ExistingMaterial;
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first_input_change = true;
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i_am_the_modifier = 0;
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g_atomic_int_set (&_record_enabled, 0);
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was_recording = false;
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capture_start_frame = 0;
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capture_captured = 0;
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_visible_speed = 1.0f;
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_actual_speed = 1.0f;
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_buffer_reallocation_required = false;
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_seek_required = false;
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first_recordable_frame = max_frames;
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last_recordable_frame = max_frames;
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_roll_delay = 0;
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_capture_offset = 0;
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_processed = false;
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_slaved = false;
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adjust_capture_position = 0;
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last_possibly_recording = 0;
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loop_location = 0;
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wrap_buffer_size = 0;
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speed_buffer_size = 0;
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last_phase = 0;
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phi = (uint64_t) (0x1000000);
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file_frame = 0;
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playback_sample = 0;
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playback_distance = 0;
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_read_data_count = 0;
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_write_data_count = 0;
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pending_overwrite = false;
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overwrite_frame = 0;
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overwrite_queued = false;
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input_change_pending = NoChange;
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_n_channels = 0;
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}
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Diskstream::~Diskstream ()
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{
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// Taken by derived class destrctors.. should assure locked here somehow?
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//Glib::Mutex::Lock lm (state_lock);
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if (_playlist)
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_playlist->release ();
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}
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void
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Diskstream::set_io (IO& io)
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{
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_io = &io;
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set_align_style_from_io ();
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}
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void
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Diskstream::handle_input_change (IOChange change, void *src)
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{
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Glib::Mutex::Lock lm (state_lock);
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if (!(input_change_pending & change)) {
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input_change_pending = IOChange (input_change_pending|change);
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_session.request_input_change_handling ();
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}
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}
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void
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Diskstream::non_realtime_set_speed ()
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{
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if (_buffer_reallocation_required)
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{
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Glib::Mutex::Lock lm (state_lock);
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allocate_temporary_buffers ();
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_buffer_reallocation_required = false;
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}
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if (_seek_required) {
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if (speed() != 1.0f || speed() != -1.0f) {
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seek ((nframes_t) (_session.transport_frame() * (double) speed()), true);
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}
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else {
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seek (_session.transport_frame(), true);
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}
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_seek_required = false;
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}
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}
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bool
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Diskstream::realtime_set_speed (double sp, bool global)
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{
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bool changed = false;
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double new_speed = sp * _session.transport_speed();
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if (_visible_speed != sp) {
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_visible_speed = sp;
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changed = true;
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}
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if (new_speed != _actual_speed) {
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nframes_t required_wrap_size = (nframes_t) floor (_session.get_block_size() *
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fabs (new_speed)) + 1;
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if (required_wrap_size > wrap_buffer_size) {
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_buffer_reallocation_required = true;
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}
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_actual_speed = new_speed;
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phi = (uint64_t) (0x1000000 * fabs(_actual_speed));
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}
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if (changed) {
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if (!global) {
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_seek_required = true;
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}
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SpeedChanged (); /* EMIT SIGNAL */
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}
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return _buffer_reallocation_required || _seek_required;
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}
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void
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Diskstream::prepare ()
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{
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_processed = false;
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playback_distance = 0;
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}
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void
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Diskstream::recover ()
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{
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state_lock.unlock();
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_processed = false;
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}
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void
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Diskstream::set_capture_offset ()
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{
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if (_io == 0) {
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/* can't capture, so forget it */
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return;
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}
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_capture_offset = _io->input_latency();
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}
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void
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Diskstream::set_align_style (AlignStyle a)
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{
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if (record_enabled() && _session.actively_recording()) {
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return;
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}
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if (a != _alignment_style) {
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_alignment_style = a;
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AlignmentStyleChanged ();
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}
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}
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int
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Diskstream::set_loop (Location *location)
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{
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if (location) {
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if (location->start() >= location->end()) {
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error << string_compose(_("Location \"%1\" not valid for track loop (start >= end)"), location->name()) << endl;
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return -1;
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}
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}
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loop_location = location;
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LoopSet (location); /* EMIT SIGNAL */
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return 0;
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}
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nframes_t
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Diskstream::get_capture_start_frame (uint32_t n)
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{
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Glib::Mutex::Lock lm (capture_info_lock);
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if (capture_info.size() > n) {
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return capture_info[n]->start;
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}
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else {
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return capture_start_frame;
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}
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}
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nframes_t
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Diskstream::get_captured_frames (uint32_t n)
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{
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Glib::Mutex::Lock lm (capture_info_lock);
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if (capture_info.size() > n) {
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return capture_info[n]->frames;
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}
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else {
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return capture_captured;
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}
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}
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void
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Diskstream::set_roll_delay (nframes_t nframes)
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{
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_roll_delay = nframes;
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}
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void
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Diskstream::set_speed (double sp)
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{
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_session.request_diskstream_speed (*this, sp);
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/* to force a rebuffering at the right place */
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playlist_modified();
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}
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int
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Diskstream::use_playlist (boost::shared_ptr<Playlist> playlist)
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{
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{
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Glib::Mutex::Lock lm (state_lock);
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if (playlist == _playlist) {
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return 0;
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}
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plmod_connection.disconnect ();
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plgone_connection.disconnect ();
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if (_playlist) {
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_playlist->release();
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}
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_playlist = playlist;
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_playlist->use();
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if (!in_set_state && recordable()) {
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reset_write_sources (false);
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}
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plmod_connection = _playlist->Modified.connect (mem_fun (*this, &Diskstream::playlist_modified));
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plgone_connection = _playlist->GoingAway.connect (bind (mem_fun (*this, &Diskstream::playlist_deleted), boost::weak_ptr<Playlist>(_playlist)));
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}
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/* don't do this if we've already asked for it *or* if we are setting up
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the diskstream for the very first time - the input changed handling will
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take care of the buffer refill.
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*/
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if (!overwrite_queued && !(_session.state_of_the_state() & Session::CannotSave)) {
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_session.request_overwrite_buffer (this);
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overwrite_queued = true;
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}
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PlaylistChanged (); /* EMIT SIGNAL */
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_session.set_dirty ();
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return 0;
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}
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void
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Diskstream::playlist_changed (Change ignored)
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{
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playlist_modified ();
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}
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void
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Diskstream::playlist_modified ()
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{
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if (!i_am_the_modifier && !overwrite_queued) {
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_session.request_overwrite_buffer (this);
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overwrite_queued = true;
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}
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}
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void
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Diskstream::playlist_deleted (boost::weak_ptr<Playlist> wpl)
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{
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boost::shared_ptr<Playlist> pl (wpl.lock());
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if (pl == _playlist) {
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/* this catches an ordering issue with session destruction. playlists
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are destroyed before diskstreams. we have to invalidate any handles
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we have to the playlist.
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*/
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if (_playlist) {
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_playlist.reset ();
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}
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}
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}
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int
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Diskstream::set_name (string str)
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{
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if (str != _name) {
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assert(playlist());
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playlist()->set_name (str);
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_name = str;
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if (!in_set_state && recordable()) {
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/* rename existing capture files so that they have the correct name */
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return rename_write_sources ();
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} else {
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return -1;
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}
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}
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return 0;
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}
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void
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Diskstream::remove_region_from_last_capture (boost::weak_ptr<Region> wregion)
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{
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boost::shared_ptr<Region> region (wregion.lock());
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if (!region) {
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return;
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}
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_last_capture_regions.remove (region);
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}
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