1 files changed, 401 insertions, 0 deletions
diff --git a/libs/ardour/diskstream.cc b/libs/ardour/diskstream.cc
new file mode 100644
index 0000000000..9312de5bf1
--- /dev/null
+++ b/libs/ardour/diskstream.cc
@@ -0,0 +1,401 @@
+/*
+    Copyright (C) 2000-2006 Paul Davis 
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+    $Id: diskstream.cc 567 2006-06-07 14:54:12Z trutkin $
+*/
+
+#include <fstream>
+#include <cstdio>
+#include <unistd.h>
+#include <cmath>
+#include <cerrno>
+#include <string>
+#include <climits>
+#include <fcntl.h>
+#include <cstdlib>
+#include <ctime>
+#include <sys/stat.h>
+#include <sys/mman.h>
+
+#include <pbd/error.h>
+#include <pbd/basename.h>
+#include <glibmm/thread.h>
+#include <pbd/xml++.h>
+
+#include <ardour/ardour.h>
+#include <ardour/audioengine.h>
+#include <ardour/diskstream.h>
+#include <ardour/utils.h>
+#include <ardour/configuration.h>
+#include <ardour/audiofilesource.h>
+#include <ardour/destructive_filesource.h>
+#include <ardour/send.h>
+#include <ardour/playlist.h>
+#include <ardour/cycle_timer.h>
+#include <ardour/region.h>
+
+#include "i18n.h"
+#include <locale.h>
+
+using namespace std;
+using namespace ARDOUR;
+using namespace PBD;
+
+jack_nframes_t Diskstream::disk_io_chunk_frames = 0;
+
+sigc::signal<void,Diskstream*>    Diskstream::DiskstreamCreated;
+sigc::signal<void,list<Source*>*> Diskstream::DeleteSources;
+sigc::signal<void>                Diskstream::DiskOverrun;
+sigc::signal<void>                Diskstream::DiskUnderrun;
+
+Diskstream::Diskstream (Session &sess, const string &name, Flag flag)
+	: _name (name)
+	, _session (sess)
+	, _playlist(NULL)
+{
+	init (flag);
+}
+	
+Diskstream::Diskstream (Session& sess, const XMLNode& node)
+	: _session (sess)
+	, _playlist(NULL)
+{
+	init (Recordable);
+}
+
+void
+Diskstream::init (Flag f)
+{
+	_refcnt = 0;
+	_flags = f;
+	_io = 0;
+	_alignment_style = ExistingMaterial;
+	_persistent_alignment_style = ExistingMaterial;
+	first_input_change = true;
+	i_am_the_modifier = 0;
+	g_atomic_int_set (&_record_enabled, 0);
+	was_recording = false;
+	capture_start_frame = 0;
+	capture_captured = 0;
+	_visible_speed = 1.0f;
+	_actual_speed = 1.0f;
+	_buffer_reallocation_required = false;
+	_seek_required = false;
+	first_recordable_frame = max_frames;
+	last_recordable_frame = max_frames;
+	_roll_delay = 0;
+	_capture_offset = 0;
+	_processed = false;
+	_slaved = false;
+	adjust_capture_position = 0;
+	last_possibly_recording = 0;
+	loop_location = 0;
+	wrap_buffer_size = 0;
+	speed_buffer_size = 0;
+	last_phase = 0;
+	phi = (uint64_t) (0x1000000);
+	file_frame = 0;
+	playback_sample = 0;
+	playback_distance = 0;
+	_read_data_count = 0;
+	_write_data_count = 0;
+
+	pending_overwrite = false;
+	overwrite_frame = 0;
+	overwrite_queued = false;
+	input_change_pending = NoChange;
+
+	_n_channels = 0;
+}
+
+Diskstream::~Diskstream ()
+{
+	// Taken by derived class destrctors.. should assure locked here somehow?
+	//Glib::Mutex::Lock lm (state_lock);
+
+	if (_playlist)
+		_playlist->unref ();
+}
+
+void
+Diskstream::set_io (IO& io)
+{
+	_io = &io;
+	set_align_style_from_io ();
+}
+
+void
+Diskstream::handle_input_change (IOChange change, void *src)
+{
+	Glib::Mutex::Lock lm (state_lock);
+
+	if (!(input_change_pending & change)) {
+		input_change_pending = IOChange (input_change_pending|change);
+		_session.request_input_change_handling ();
+	}
+}
+
+void
+Diskstream::non_realtime_set_speed ()
+{
+	if (_buffer_reallocation_required)
+	{
+		Glib::Mutex::Lock lm (state_lock);
+		allocate_temporary_buffers ();
+
+		_buffer_reallocation_required = false;
+	}
+
+	if (_seek_required) {
+		if (speed() != 1.0f || speed() != -1.0f) {
+			seek ((jack_nframes_t) (_session.transport_frame() * (double) speed()), true);
+		}
+		else {
+			seek (_session.transport_frame(), true);
+		}
+
+		_seek_required = false;
+	}
+}
+
+bool
+Diskstream::realtime_set_speed (double sp, bool global)
+{
+	bool changed = false;
+	double new_speed = sp * _session.transport_speed();
+	
+	if (_visible_speed != sp) {
+		_visible_speed = sp;
+		changed = true;
+	}
+	
+	if (new_speed != _actual_speed) {
+		
+		jack_nframes_t required_wrap_size = (jack_nframes_t) floor (_session.get_block_size() * 
+									    fabs (new_speed)) + 1;
+		
+		if (required_wrap_size > wrap_buffer_size) {
+			_buffer_reallocation_required = true;
+		}
+		
+		_actual_speed = new_speed;
+		phi = (uint64_t) (0x1000000 * fabs(_actual_speed));
+	}
+
+	if (changed) {
+		if (!global) {
+			_seek_required = true;
+		}
+		SpeedChanged (); /* EMIT SIGNAL */
+	}
+
+	return _buffer_reallocation_required || _seek_required;
+}
+
+void
+Diskstream::prepare ()
+{
+	_processed = false;
+	playback_distance = 0;
+}
+
+void
+Diskstream::recover ()
+{
+	state_lock.unlock();
+	_processed = false;
+}
+
+void
+Diskstream::set_capture_offset ()
+{
+	if (_io == 0) {
+		/* can't capture, so forget it */
+		return;
+	}
+
+	_capture_offset = _io->input_latency();
+}
+
+void
+Diskstream::set_align_style (AlignStyle a)
+{
+	if (record_enabled() && _session.actively_recording()) {
+		return;
+	}
+
+	if (a != _alignment_style) {
+		_alignment_style = a;
+		AlignmentStyleChanged ();
+	}
+}
+
+int
+Diskstream::set_loop (Location *location)
+{
+	if (location) {
+		if (location->start() >= location->end()) {
+			error << string_compose(_("Location \"%1\" not valid for track loop (start >= end)"), location->name()) << endl;
+			return -1;
+		}
+	}
+
+	loop_location = location;
+
+	 LoopSet (location); /* EMIT SIGNAL */
+	return 0;
+}
+
+jack_nframes_t
+Diskstream::get_capture_start_frame (uint32_t n)
+{
+	Glib::Mutex::Lock lm (capture_info_lock);
+
+	if (capture_info.size() > n) {
+		return capture_info[n]->start;
+	}
+	else {
+		return capture_start_frame;
+	}
+}
+
+jack_nframes_t
+Diskstream::get_captured_frames (uint32_t n)
+{
+	Glib::Mutex::Lock lm (capture_info_lock);
+
+	if (capture_info.size() > n) {
+		return capture_info[n]->frames;
+	}
+	else {
+		return capture_captured;
+	}
+}
+
+void
+Diskstream::set_roll_delay (jack_nframes_t nframes)
+{
+	_roll_delay = nframes;
+}
+
+void
+Diskstream::set_speed (double sp)
+{
+	_session.request_diskstream_speed (*this, sp);
+
+	/* to force a rebuffering at the right place */
+	playlist_modified();
+}
+
+int
+Diskstream::use_playlist (Playlist* playlist)
+{
+	{
+		Glib::Mutex::Lock lm (state_lock);
+
+		if (playlist == _playlist) {
+			return 0;
+		}
+
+		plstate_connection.disconnect();
+		plmod_connection.disconnect ();
+		plgone_connection.disconnect ();
+
+		if (_playlist) {
+			_playlist->unref();
+		}
+			
+		_playlist = playlist;
+		_playlist->ref();
+
+		if (!in_set_state && recordable()) {
+			reset_write_sources (false);
+		}
+		
+		plstate_connection = _playlist->StateChanged.connect (mem_fun (*this, &Diskstream::playlist_changed));
+		plmod_connection = _playlist->Modified.connect (mem_fun (*this, &Diskstream::playlist_modified));
+		plgone_connection = _playlist->GoingAway.connect (mem_fun (*this, &Diskstream::playlist_deleted));
+	}
+
+	if (!overwrite_queued) {
+		_session.request_overwrite_buffer (this);
+		overwrite_queued = true;
+	}
+	
+	PlaylistChanged (); /* EMIT SIGNAL */
+	_session.set_dirty ();
+
+	return 0;
+}
+
+void
+Diskstream::playlist_changed (Change ignored)
+{
+	playlist_modified ();
+}
+
+void
+Diskstream::playlist_modified ()
+{
+	if (!i_am_the_modifier && !overwrite_queued) {
+		_session.request_overwrite_buffer (this);
+		overwrite_queued = true;
+	} 
+}
+
+void
+Diskstream::playlist_deleted (Playlist* pl)
+{
+	/* this catches an ordering issue with session destruction. playlists 
+	   are destroyed before diskstreams. we have to invalidate any handles
+	   we have to the playlist.
+	*/
+
+	_playlist = 0;
+}
+
+int
+Diskstream::set_name (string str)
+{
+	if (str != _name) {
+		assert(playlist());
+		playlist()->set_name (str);
+		_name = str;
+		
+		if (!in_set_state && recordable()) {
+			/* rename existing capture files so that they have the correct name */
+			return rename_write_sources ();
+		} else {
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+void
+Diskstream::set_destructive (bool yn)
+{
+	if (yn != destructive()) {
+		reset_write_sources (true, true);
+		if (yn) {
+			_flags |= Destructive;
+		} else {
+			_flags &= ~Destructive;
+		}
+	}
+}