git-svn-id: svn://localhost/ardour2/branches/3.0@9654 d708f5d6-7413-0410-9779-e7cbd77b26cf
1011 lines
26 KiB
C++
1011 lines
26 KiB
C++
/*
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Copyright (C) 2000 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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*/
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#include <sys/stat.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <poll.h>
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#include <float.h>
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#include <utime.h>
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#include <cerrno>
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#include <ctime>
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#include <cmath>
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#include <iomanip>
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#include <fstream>
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#include <algorithm>
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#include <vector>
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#include <glibmm/fileutils.h>
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#include <glibmm/miscutils.h>
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#include "pbd/xml++.h"
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#include "pbd/pthread_utils.h"
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#include "ardour/audiosource.h"
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#include "ardour/audio_diskstream.h"
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#include "ardour/cycle_timer.h"
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#include "ardour/session.h"
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#include "ardour/transient_detector.h"
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#include "ardour/runtime_functions.h"
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#include "i18n.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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Glib::StaticMutex AudioSource::_level_buffer_lock = GLIBMM_STATIC_MUTEX_INIT;
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vector<boost::shared_ptr<Sample> > AudioSource::_mixdown_buffers;
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vector<boost::shared_ptr<gain_t> > AudioSource::_gain_buffers;
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size_t AudioSource::_working_buffers_size = 0;
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bool AudioSource::_build_missing_peakfiles = false;
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/** true if we want peakfiles (e.g. if we are displaying a GUI) */
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bool AudioSource::_build_peakfiles = false;
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#define _FPP 256
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AudioSource::AudioSource (Session& s, string name)
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: Source (s, DataType::AUDIO, name)
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, _length (0)
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{
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_peaks_built = false;
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_peak_byte_max = 0;
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_peakfile_descriptor = 0;
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_read_data_count = 0;
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_write_data_count = 0;
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peak_leftover_cnt = 0;
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peak_leftover_size = 0;
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peak_leftovers = 0;
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}
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AudioSource::AudioSource (Session& s, const XMLNode& node)
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: Source (s, node)
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, _length (0)
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{
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_peaks_built = false;
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_peak_byte_max = 0;
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_peakfile_descriptor = 0;
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_read_data_count = 0;
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_write_data_count = 0;
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peak_leftover_cnt = 0;
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peak_leftover_size = 0;
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peak_leftovers = 0;
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if (set_state (node, Stateful::loading_state_version)) {
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throw failed_constructor();
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}
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}
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AudioSource::~AudioSource ()
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{
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/* shouldn't happen but make sure we don't leak file descriptors anyway */
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if (peak_leftover_cnt) {
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cerr << "AudioSource destroyed with leftover peak data pending" << endl;
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}
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delete _peakfile_descriptor;
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delete [] peak_leftovers;
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}
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XMLNode&
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AudioSource::get_state ()
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{
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XMLNode& node (Source::get_state());
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if (_captured_for.length()) {
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node.add_property ("captured-for", _captured_for);
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}
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return node;
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}
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int
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AudioSource::set_state (const XMLNode& node, int /*version*/)
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{
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const XMLProperty* prop;
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if ((prop = node.property ("captured-for")) != 0) {
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_captured_for = prop->value();
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}
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return 0;
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}
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bool
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AudioSource::empty () const
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{
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return _length == 0;
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}
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framecnt_t
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AudioSource::length (framepos_t /*pos*/) const
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{
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return _length;
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}
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void
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AudioSource::update_length (framepos_t pos, framecnt_t cnt)
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{
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if (pos + cnt > _length) {
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_length = pos + cnt;
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}
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}
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/***********************************************************************
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PEAK FILE STUFF
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***********************************************************************/
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/** Checks to see if peaks are ready. If so, we return true. If not, we return false, and
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* things are set up so that doThisWhenReady is called when the peaks are ready.
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* A new PBD::ScopedConnection is created for the associated connection and written to
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* *connect_here_if_not.
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*
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* @param doThisWhenReady Function to call when peaks are ready (if they are not already).
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* @param connect_here_if_not Address to write new ScopedConnection to.
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* @param event_loop Event loop for doThisWhenReady to be called in.
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*/
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bool
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AudioSource::peaks_ready (boost::function<void()> doThisWhenReady, ScopedConnection** connect_here_if_not, EventLoop* event_loop) const
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{
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bool ret;
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Glib::Mutex::Lock lm (_peaks_ready_lock);
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if (!(ret = _peaks_built)) {
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*connect_here_if_not = new ScopedConnection;
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PeaksReady.connect (**connect_here_if_not, MISSING_INVALIDATOR, doThisWhenReady, event_loop);
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}
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return ret;
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}
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void
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AudioSource::touch_peakfile ()
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{
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struct stat statbuf;
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if (stat (peakpath.c_str(), &statbuf) != 0 || statbuf.st_size == 0) {
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return;
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}
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struct utimbuf tbuf;
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tbuf.actime = statbuf.st_atime;
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tbuf.modtime = time ((time_t) 0);
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utime (peakpath.c_str(), &tbuf);
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}
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int
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AudioSource::rename_peakfile (string newpath)
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{
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/* caller must hold _lock */
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string oldpath = peakpath;
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if (Glib::file_test (oldpath, Glib::FILE_TEST_EXISTS)) {
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if (rename (oldpath.c_str(), newpath.c_str()) != 0) {
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error << string_compose (_("cannot rename peakfile for %1 from %2 to %3 (%4)"), _name, oldpath, newpath, strerror (errno)) << endmsg;
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return -1;
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}
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}
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peakpath = newpath;
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return 0;
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}
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int
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AudioSource::initialize_peakfile (bool newfile, string audio_path)
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{
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struct stat statbuf;
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peakpath = peak_path (audio_path);
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/* if the peak file should be there, but isn't .... */
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if (!newfile && !Glib::file_test (peakpath.c_str(), Glib::FILE_TEST_EXISTS)) {
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peakpath = find_broken_peakfile (peakpath, audio_path);
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}
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if (stat (peakpath.c_str(), &statbuf)) {
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if (errno != ENOENT) {
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/* it exists in the peaks dir, but there is some kind of error */
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error << string_compose(_("AudioSource: cannot stat peakfile \"%1\""), peakpath) << endmsg;
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return -1;
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}
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/* peakfile does not exist */
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_peaks_built = false;
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} else {
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/* we found it in the peaks dir, so check it out */
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if (statbuf.st_size == 0 || (statbuf.st_size < (off_t) ((length(_timeline_position) / _FPP) * sizeof (PeakData)))) {
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// empty
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_peaks_built = false;
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} else {
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// Check if the audio file has changed since the peakfile was built.
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struct stat stat_file;
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int err = stat (audio_path.c_str(), &stat_file);
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if (err) {
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/* no audio path - nested source or we can't
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read it or ... whatever, use the peakfile as-is.
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*/
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_peaks_built = true;
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_peak_byte_max = statbuf.st_size;
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} else {
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/* allow 6 seconds slop on checking peak vs. file times because of various
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disk action "races"
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*/
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if (stat_file.st_mtime > statbuf.st_mtime && (stat_file.st_mtime - statbuf.st_mtime > 6)) {
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_peaks_built = false;
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_peak_byte_max = 0;
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} else {
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_peaks_built = true;
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_peak_byte_max = statbuf.st_size;
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}
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}
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}
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}
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if (!newfile && !_peaks_built && _build_missing_peakfiles && _build_peakfiles) {
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build_peaks_from_scratch ();
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}
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return 0;
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}
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framecnt_t
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AudioSource::read (Sample *dst, framepos_t start, framecnt_t cnt, int /*channel*/) const
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{
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Glib::Mutex::Lock lm (_lock);
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return read_unlocked (dst, start, cnt);
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}
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framecnt_t
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AudioSource::write (Sample *dst, framecnt_t cnt)
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{
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Glib::Mutex::Lock lm (_lock);
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/* any write makes the fill not removable */
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_flags = Flag (_flags & ~Removable);
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return write_unlocked (dst, cnt);
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}
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int
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AudioSource::read_peaks (PeakData *peaks, framecnt_t npeaks, framepos_t start, framecnt_t cnt, double samples_per_visual_peak) const
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{
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return read_peaks_with_fpp (peaks, npeaks, start, cnt, samples_per_visual_peak, _FPP);
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}
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/** @param peaks Buffer to write peak data.
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* @param npeaks Number of peaks to write.
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*/
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int
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AudioSource::read_peaks_with_fpp (PeakData *peaks, framecnt_t npeaks, framepos_t start, framecnt_t cnt,
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double samples_per_visual_peak, framecnt_t samples_per_file_peak) const
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{
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Glib::Mutex::Lock lm (_lock);
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double scale;
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double expected_peaks;
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PeakData::PeakDatum xmax;
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PeakData::PeakDatum xmin;
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int32_t to_read;
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uint32_t nread;
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framecnt_t zero_fill = 0;
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int ret = -1;
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PeakData* staging = 0;
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Sample* raw_staging = 0;
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FdFileDescriptor* peakfile_descriptor = new FdFileDescriptor (peakpath, false, 0664);
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int peakfile_fd = -1;
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expected_peaks = (cnt / (double) samples_per_file_peak);
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scale = npeaks/expected_peaks;
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#undef DEBUG_READ_PEAKS
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#ifdef DEBUG_READ_PEAKS
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cerr << "======>RP: npeaks = " << npeaks
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<< " start = " << start
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<< " cnt = " << cnt
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<< " len = " << _length
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<< " samples_per_visual_peak =" << samples_per_visual_peak
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<< " expected was " << expected_peaks << " ... scale = " << scale
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<< " PD ptr = " << peaks
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<<endl;
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#endif
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/* fix for near-end-of-file conditions */
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if (cnt > _length - start) {
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// cerr << "too close to end @ " << _length << " given " << start << " + " << cnt << endl;
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cnt = _length - start;
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framecnt_t old = npeaks;
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npeaks = min ((framecnt_t) floor (cnt / samples_per_visual_peak), npeaks);
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zero_fill = old - npeaks;
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}
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// cerr << "actual npeaks = " << npeaks << " zf = " << zero_fill << endl;
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if (npeaks == cnt) {
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#ifdef DEBUG_READ_PEAKS
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cerr << "RAW DATA\n";
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#endif
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/* no scaling at all, just get the sample data and duplicate it for
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both max and min peak values.
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*/
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Sample* raw_staging = new Sample[cnt];
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if (read_unlocked (raw_staging, start, cnt) != cnt) {
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error << _("cannot read sample data for unscaled peak computation") << endmsg;
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return -1;
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}
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for (framecnt_t i = 0; i < npeaks; ++i) {
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peaks[i].max = raw_staging[i];
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peaks[i].min = raw_staging[i];
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}
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delete peakfile_descriptor;
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delete [] raw_staging;
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return 0;
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}
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if (scale == 1.0) {
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off_t first_peak_byte = (start / samples_per_file_peak) * sizeof (PeakData);
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/* open, read, close */
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if ((peakfile_fd = peakfile_descriptor->allocate ()) < 0) {
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error << string_compose(_("AudioSource: cannot open peakpath (a) \"%1\" (%2)"), peakpath, strerror (errno)) << endmsg;
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delete peakfile_descriptor;
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return -1;
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}
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#ifdef DEBUG_READ_PEAKS
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cerr << "DIRECT PEAKS\n";
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#endif
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nread = ::pread (peakfile_fd, peaks, sizeof (PeakData)* npeaks, first_peak_byte);
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delete peakfile_descriptor;
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if (nread != sizeof (PeakData) * npeaks) {
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cerr << "AudioSource["
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<< _name
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<< "]: cannot read peaks from peakfile! (read only "
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<< nread
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<< " not "
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<< npeaks
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<< "at sample "
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<< start
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<< " = byte "
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<< first_peak_byte
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<< ')'
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<< endl;
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delete peakfile_descriptor;
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return -1;
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}
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if (zero_fill) {
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memset (&peaks[npeaks], 0, sizeof (PeakData) * zero_fill);
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}
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delete peakfile_descriptor;
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return 0;
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}
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framecnt_t tnp;
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if (scale < 1.0) {
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#ifdef DEBUG_READ_PEAKS
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cerr << "DOWNSAMPLE\n";
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#endif
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/* the caller wants:
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- more frames-per-peak (lower resolution) than the peakfile, or to put it another way,
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- less peaks than the peakfile holds for the same range
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So, read a block into a staging area, and then downsample from there.
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to avoid confusion, I'll refer to the requested peaks as visual_peaks and the peakfile peaks as stored_peaks
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*/
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const framecnt_t chunksize = (framecnt_t) min (expected_peaks, 65536.0);
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staging = new PeakData[chunksize];
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/* compute the rounded up frame position */
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framepos_t current_frame = start;
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framepos_t current_stored_peak = (framepos_t) ceil (current_frame / (double) samples_per_file_peak);
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framepos_t next_visual_peak = (framepos_t) ceil (current_frame / samples_per_visual_peak);
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double next_visual_peak_frame = next_visual_peak * samples_per_visual_peak;
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framepos_t stored_peak_before_next_visual_peak = (framepos_t) next_visual_peak_frame / samples_per_file_peak;
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framecnt_t nvisual_peaks = 0;
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framecnt_t stored_peaks_read = 0;
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framecnt_t i = 0;
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/* handle the case where the initial visual peak is on a pixel boundary */
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current_stored_peak = min (current_stored_peak, stored_peak_before_next_visual_peak);
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/* open ... close during out: handling */
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if ((peakfile_fd = peakfile_descriptor->allocate ()) < 0) {
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error << string_compose(_("AudioSource: cannot open peakpath (b) \"%1\" (%2)"), peakpath, strerror (errno)) << endmsg;
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delete peakfile_descriptor;
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delete [] staging;
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return 0;
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}
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while (nvisual_peaks < npeaks) {
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if (i == stored_peaks_read) {
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uint32_t start_byte = current_stored_peak * sizeof(PeakData);
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tnp = min ((framecnt_t)(_length/samples_per_file_peak - current_stored_peak), (framecnt_t) expected_peaks);
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to_read = min (chunksize, tnp);
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#ifdef DEBUG_READ_PEAKS
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cerr << "read " << sizeof (PeakData) * to_read << " from peakfile @ " << start_byte << endl;
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#endif
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if ((nread = ::pread (peakfile_fd, staging, sizeof (PeakData) * to_read, start_byte))
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!= sizeof (PeakData) * to_read) {
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off_t fend = lseek (peakfile_fd, 0, SEEK_END);
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cerr << "AudioSource["
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<< _name
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<< "]: cannot read peak data from peakfile ("
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<< (nread / sizeof(PeakData))
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<< " peaks instead of "
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<< to_read
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<< ") ("
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<< strerror (errno)
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<< ')'
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<< " at start_byte = " << start_byte
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<< " _length = " << _length << " versus len = " << fend
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<< " expected maxpeaks = " << (_length - current_frame)/samples_per_file_peak
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<< " npeaks was " << npeaks
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<< endl;
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goto out;
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}
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i = 0;
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stored_peaks_read = nread / sizeof(PeakData);
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}
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xmax = -1.0;
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xmin = 1.0;
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while ((i < stored_peaks_read) && (current_stored_peak <= stored_peak_before_next_visual_peak)) {
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xmax = max (xmax, staging[i].max);
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xmin = min (xmin, staging[i].min);
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++i;
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++current_stored_peak;
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--expected_peaks;
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}
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peaks[nvisual_peaks].max = xmax;
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peaks[nvisual_peaks].min = xmin;
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++nvisual_peaks;
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|
++next_visual_peak;
|
|
|
|
//next_visual_peak_frame = min ((next_visual_peak * samples_per_visual_peak), (next_visual_peak_frame+samples_per_visual_peak) );
|
|
next_visual_peak_frame = min ((double) start+cnt, (next_visual_peak_frame+samples_per_visual_peak) );
|
|
stored_peak_before_next_visual_peak = (uint32_t) next_visual_peak_frame / samples_per_file_peak;
|
|
}
|
|
|
|
if (zero_fill) {
|
|
memset (&peaks[npeaks], 0, sizeof (PeakData) * zero_fill);
|
|
}
|
|
|
|
ret = 0;
|
|
|
|
} else {
|
|
|
|
#ifdef DEBUG_READ_PEAKS
|
|
cerr << "UPSAMPLE\n";
|
|
#endif
|
|
/* the caller wants
|
|
|
|
- less frames-per-peak (more resolution)
|
|
- more peaks than stored in the Peakfile
|
|
|
|
So, fetch data from the raw source, and generate peak
|
|
data on the fly.
|
|
*/
|
|
|
|
framecnt_t frames_read = 0;
|
|
framepos_t current_frame = start;
|
|
framecnt_t i = 0;
|
|
framecnt_t nvisual_peaks = 0;
|
|
framecnt_t chunksize = (framecnt_t) min (cnt, (framecnt_t) 4096);
|
|
raw_staging = new Sample[chunksize];
|
|
|
|
framepos_t frame_pos = start;
|
|
double pixel_pos = floor (frame_pos / samples_per_visual_peak);
|
|
double next_pixel_pos = ceil (frame_pos / samples_per_visual_peak);
|
|
double pixels_per_frame = 1.0 / samples_per_visual_peak;
|
|
|
|
xmin = 1.0;
|
|
xmax = -1.0;
|
|
|
|
while (nvisual_peaks < npeaks) {
|
|
|
|
if (i == frames_read) {
|
|
|
|
to_read = min (chunksize, (framecnt_t)(_length - current_frame));
|
|
|
|
if (current_frame >= _length) {
|
|
|
|
/* hmm, error condition - we've reached the end of the file
|
|
without generating all the peak data. cook up a zero-filled
|
|
data buffer and then use it. this is simpler than
|
|
adjusting zero_fill and npeaks and then breaking out of
|
|
this loop early
|
|
*/
|
|
|
|
memset (raw_staging, 0, sizeof (Sample) * chunksize);
|
|
|
|
} else {
|
|
|
|
to_read = min (chunksize, (_length - current_frame));
|
|
|
|
|
|
if ((frames_read = read_unlocked (raw_staging, current_frame, to_read)) == 0) {
|
|
error << string_compose(_("AudioSource[%1]: peak read - cannot read %2 samples at offset %3 of %4 (%5)"),
|
|
_name, to_read, current_frame, _length, strerror (errno))
|
|
<< endmsg;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
i = 0;
|
|
}
|
|
|
|
xmax = max (xmax, raw_staging[i]);
|
|
xmin = min (xmin, raw_staging[i]);
|
|
++i;
|
|
++current_frame;
|
|
pixel_pos += pixels_per_frame;
|
|
|
|
if (pixel_pos >= next_pixel_pos) {
|
|
|
|
peaks[nvisual_peaks].max = xmax;
|
|
peaks[nvisual_peaks].min = xmin;
|
|
++nvisual_peaks;
|
|
xmin = 1.0;
|
|
xmax = -1.0;
|
|
|
|
next_pixel_pos = ceil (pixel_pos + 0.5);
|
|
}
|
|
}
|
|
|
|
if (zero_fill) {
|
|
memset (&peaks[npeaks], 0, sizeof (PeakData) * zero_fill);
|
|
}
|
|
|
|
ret = 0;
|
|
}
|
|
|
|
out:
|
|
delete peakfile_descriptor;
|
|
|
|
delete [] staging;
|
|
delete [] raw_staging;
|
|
|
|
#ifdef DEBUG_READ_PEAKS
|
|
cerr << "RP DONE\n";
|
|
#endif
|
|
|
|
return ret;
|
|
}
|
|
|
|
#undef DEBUG_PEAK_BUILD
|
|
|
|
int
|
|
AudioSource::build_peaks_from_scratch ()
|
|
{
|
|
Sample* buf = 0;
|
|
|
|
const framecnt_t bufsize = 65536; // 256kB per disk read for mono data is about ideal
|
|
|
|
int ret = -1;
|
|
|
|
{
|
|
/* hold lock while building peaks */
|
|
|
|
Glib::Mutex::Lock lp (_lock);
|
|
|
|
if (prepare_for_peakfile_writes ()) {
|
|
goto out;
|
|
}
|
|
|
|
framecnt_t current_frame = 0;
|
|
framecnt_t cnt = _length;
|
|
|
|
_peaks_built = false;
|
|
buf = new Sample[bufsize];
|
|
|
|
while (cnt) {
|
|
|
|
framecnt_t frames_to_read = min (bufsize, cnt);
|
|
framecnt_t frames_read;
|
|
|
|
|
|
if ((frames_read = read_unlocked (buf, current_frame, frames_to_read)) != frames_to_read) {
|
|
error << string_compose(_("%1: could not write read raw data for peak computation (%2)"), _name, strerror (errno)) << endmsg;
|
|
done_with_peakfile_writes (false);
|
|
goto out;
|
|
}
|
|
|
|
if (compute_and_write_peaks (buf, current_frame, frames_read, true, false, _FPP)) {
|
|
break;
|
|
}
|
|
|
|
current_frame += frames_read;
|
|
cnt -= frames_read;
|
|
}
|
|
|
|
if (cnt == 0) {
|
|
/* success */
|
|
truncate_peakfile();
|
|
}
|
|
|
|
done_with_peakfile_writes ((cnt == 0));
|
|
if (cnt == 0) {
|
|
ret = 0;
|
|
}
|
|
}
|
|
|
|
out:
|
|
if (ret) {
|
|
unlink (peakpath.c_str());
|
|
}
|
|
|
|
delete [] buf;
|
|
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
AudioSource::prepare_for_peakfile_writes ()
|
|
{
|
|
_peakfile_descriptor = new FdFileDescriptor (peakpath, true, 0664);
|
|
if ((_peakfile_fd = _peakfile_descriptor->allocate()) < 0) {
|
|
error << string_compose(_("AudioSource: cannot open peakpath (c) \"%1\" (%2)"), peakpath, strerror (errno)) << endmsg;
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
AudioSource::done_with_peakfile_writes (bool done)
|
|
{
|
|
if (peak_leftover_cnt) {
|
|
compute_and_write_peaks (0, 0, 0, true, false, _FPP);
|
|
}
|
|
|
|
if (done) {
|
|
Glib::Mutex::Lock lm (_peaks_ready_lock);
|
|
_peaks_built = true;
|
|
PeaksReady (); /* EMIT SIGNAL */
|
|
}
|
|
|
|
delete _peakfile_descriptor;
|
|
_peakfile_descriptor = 0;
|
|
}
|
|
|
|
/** @param first_frame Offset from the source start of the first frame to process */
|
|
int
|
|
AudioSource::compute_and_write_peaks (Sample* buf, framecnt_t first_frame, framecnt_t cnt,
|
|
bool force, bool intermediate_peaks_ready)
|
|
{
|
|
return compute_and_write_peaks (buf, first_frame, cnt, force, intermediate_peaks_ready, _FPP);
|
|
}
|
|
|
|
int
|
|
AudioSource::compute_and_write_peaks (Sample* buf, framecnt_t first_frame, framecnt_t cnt,
|
|
bool force, bool intermediate_peaks_ready, framecnt_t fpp)
|
|
{
|
|
Sample* buf2 = 0;
|
|
framecnt_t to_do;
|
|
uint32_t peaks_computed;
|
|
PeakData* peakbuf = 0;
|
|
int ret = -1;
|
|
framepos_t current_frame;
|
|
framecnt_t frames_done;
|
|
const size_t blocksize = (128 * 1024);
|
|
off_t first_peak_byte;
|
|
|
|
if (_peakfile_descriptor == 0) {
|
|
prepare_for_peakfile_writes ();
|
|
}
|
|
|
|
restart:
|
|
if (peak_leftover_cnt) {
|
|
|
|
if (first_frame != peak_leftover_frame + peak_leftover_cnt) {
|
|
|
|
/* uh-oh, ::seek() since the last ::compute_and_write_peaks(),
|
|
and we have leftovers. flush a single peak (since the leftovers
|
|
never represent more than that, and restart.
|
|
*/
|
|
|
|
PeakData x;
|
|
|
|
x.min = peak_leftovers[0];
|
|
x.max = peak_leftovers[0];
|
|
|
|
off_t byte = (peak_leftover_frame / fpp) * sizeof (PeakData);
|
|
|
|
if (::pwrite (_peakfile_fd, &x, sizeof (PeakData), byte) != sizeof (PeakData)) {
|
|
error << string_compose(_("%1: could not write peak file data (%2)"), _name, strerror (errno)) << endmsg;
|
|
goto out;
|
|
}
|
|
|
|
_peak_byte_max = max (_peak_byte_max, (off_t) (byte + sizeof(PeakData)));
|
|
|
|
{
|
|
Glib::Mutex::Lock lm (_peaks_ready_lock);
|
|
PeakRangeReady (peak_leftover_frame, peak_leftover_cnt); /* EMIT SIGNAL */
|
|
if (intermediate_peaks_ready) {
|
|
PeaksReady (); /* EMIT SIGNAL */
|
|
}
|
|
}
|
|
|
|
/* left overs are done */
|
|
|
|
peak_leftover_cnt = 0;
|
|
goto restart;
|
|
}
|
|
|
|
/* else ... had leftovers, but they immediately preceed the new data, so just
|
|
merge them and compute.
|
|
*/
|
|
|
|
/* make a new contiguous buffer containing leftovers and the new stuff */
|
|
|
|
to_do = cnt + peak_leftover_cnt;
|
|
buf2 = new Sample[to_do];
|
|
|
|
/* the remnants */
|
|
memcpy (buf2, peak_leftovers, peak_leftover_cnt * sizeof (Sample));
|
|
|
|
/* the new stuff */
|
|
memcpy (buf2+peak_leftover_cnt, buf, cnt * sizeof (Sample));
|
|
|
|
/* no more leftovers */
|
|
peak_leftover_cnt = 0;
|
|
|
|
/* use the temporary buffer */
|
|
buf = buf2;
|
|
|
|
/* make sure that when we write into the peakfile, we startup where we left off */
|
|
|
|
first_frame = peak_leftover_frame;
|
|
|
|
} else {
|
|
to_do = cnt;
|
|
}
|
|
|
|
peakbuf = new PeakData[(to_do/fpp)+1];
|
|
peaks_computed = 0;
|
|
current_frame = first_frame;
|
|
frames_done = 0;
|
|
|
|
while (to_do) {
|
|
|
|
/* if some frames were passed in (i.e. we're not flushing leftovers)
|
|
and there are less than fpp to do, save them till
|
|
next time
|
|
*/
|
|
|
|
if (force && (to_do < fpp)) {
|
|
/* keep the left overs around for next time */
|
|
|
|
if (peak_leftover_size < to_do) {
|
|
delete [] peak_leftovers;
|
|
peak_leftovers = new Sample[to_do];
|
|
peak_leftover_size = to_do;
|
|
}
|
|
memcpy (peak_leftovers, buf, to_do * sizeof (Sample));
|
|
peak_leftover_cnt = to_do;
|
|
peak_leftover_frame = current_frame;
|
|
|
|
/* done for now */
|
|
|
|
break;
|
|
}
|
|
|
|
framecnt_t this_time = min (fpp, to_do);
|
|
|
|
peakbuf[peaks_computed].max = buf[0];
|
|
peakbuf[peaks_computed].min = buf[0];
|
|
|
|
ARDOUR::find_peaks (buf+1, this_time-1, &peakbuf[peaks_computed].min, &peakbuf[peaks_computed].max);
|
|
|
|
peaks_computed++;
|
|
buf += this_time;
|
|
to_do -= this_time;
|
|
frames_done += this_time;
|
|
current_frame += this_time;
|
|
}
|
|
|
|
first_peak_byte = (first_frame / fpp) * sizeof (PeakData);
|
|
|
|
if (can_truncate_peaks()) {
|
|
|
|
/* on some filesystems (ext3, at least) this helps to reduce fragmentation of
|
|
the peakfiles. its not guaranteed to do so, and even on ext3 (as of december 2006)
|
|
it does not cause single-extent allocation even for peakfiles of
|
|
less than BLOCKSIZE bytes. only call ftruncate if we'll make the file larger.
|
|
*/
|
|
|
|
off_t endpos = lseek (_peakfile_fd, 0, SEEK_END);
|
|
off_t target_length = blocksize * ((first_peak_byte + blocksize + 1) / blocksize);
|
|
|
|
if (endpos < target_length) {
|
|
(void) ftruncate (_peakfile_fd, target_length);
|
|
/* error doesn't actually matter though, so continue on without testing */
|
|
}
|
|
}
|
|
|
|
if (::pwrite (_peakfile_fd, peakbuf, sizeof (PeakData) * peaks_computed, first_peak_byte) != (ssize_t) (sizeof (PeakData) * peaks_computed)) {
|
|
error << string_compose(_("%1: could not write peak file data (%2)"), _name, strerror (errno)) << endmsg;
|
|
goto out;
|
|
}
|
|
|
|
_peak_byte_max = max (_peak_byte_max, (off_t) (first_peak_byte + sizeof(PeakData)*peaks_computed));
|
|
|
|
if (frames_done) {
|
|
Glib::Mutex::Lock lm (_peaks_ready_lock);
|
|
PeakRangeReady (first_frame, frames_done); /* EMIT SIGNAL */
|
|
if (intermediate_peaks_ready) {
|
|
PeaksReady (); /* EMIT SIGNAL */
|
|
}
|
|
}
|
|
|
|
ret = 0;
|
|
|
|
out:
|
|
delete [] peakbuf;
|
|
delete [] buf2;
|
|
|
|
return ret;
|
|
}
|
|
|
|
void
|
|
AudioSource::truncate_peakfile ()
|
|
{
|
|
if (_peakfile_descriptor == 0) {
|
|
error << string_compose (_("programming error: %1"), "AudioSource::truncate_peakfile() called without open peakfile descriptor")
|
|
<< endmsg;
|
|
return;
|
|
}
|
|
|
|
/* truncate the peakfile down to its natural length if necessary */
|
|
|
|
off_t end = lseek (_peakfile_fd, 0, SEEK_END);
|
|
|
|
if (end > _peak_byte_max) {
|
|
(void) ftruncate (_peakfile_fd, _peak_byte_max);
|
|
}
|
|
}
|
|
|
|
framecnt_t
|
|
AudioSource::available_peaks (double zoom_factor) const
|
|
{
|
|
if (zoom_factor < _FPP) {
|
|
return length(_timeline_position); // peak data will come from the audio file
|
|
}
|
|
|
|
/* peak data comes from peakfile, but the filesize might not represent
|
|
the valid data due to ftruncate optimizations, so use _peak_byte_max state.
|
|
XXX - there might be some atomicity issues here, we should probably add a lock,
|
|
but _peak_byte_max only monotonically increases after initialization.
|
|
*/
|
|
|
|
off_t end = _peak_byte_max;
|
|
|
|
return (end/sizeof(PeakData)) * _FPP;
|
|
}
|
|
|
|
void
|
|
AudioSource::dec_read_data_count (framecnt_t cnt)
|
|
{
|
|
uint32_t val = cnt * sizeof (Sample);
|
|
|
|
if (val < _read_data_count) {
|
|
_read_data_count -= val;
|
|
} else {
|
|
_read_data_count = 0;
|
|
}
|
|
}
|
|
|
|
void
|
|
AudioSource::mark_streaming_write_completed ()
|
|
{
|
|
Glib::Mutex::Lock lm (_peaks_ready_lock);
|
|
|
|
if (_peaks_built) {
|
|
PeaksReady (); /* EMIT SIGNAL */
|
|
}
|
|
}
|
|
|
|
void
|
|
AudioSource::allocate_working_buffers (framecnt_t framerate)
|
|
{
|
|
Glib::Mutex::Lock lm (_level_buffer_lock);
|
|
|
|
|
|
/* Note: we don't need any buffers allocated until
|
|
a level 1 audiosource is created, at which
|
|
time we'll call ::ensure_buffers_for_level()
|
|
with the right value and do the right thing.
|
|
*/
|
|
|
|
if (!_mixdown_buffers.empty()) {
|
|
ensure_buffers_for_level_locked ( _mixdown_buffers.size(), framerate);
|
|
}
|
|
}
|
|
|
|
void
|
|
AudioSource::ensure_buffers_for_level (uint32_t level, framecnt_t frame_rate)
|
|
{
|
|
Glib::Mutex::Lock lm (_level_buffer_lock);
|
|
ensure_buffers_for_level_locked (level, frame_rate);
|
|
}
|
|
|
|
void
|
|
AudioSource::ensure_buffers_for_level_locked (uint32_t level, framecnt_t frame_rate)
|
|
{
|
|
framecnt_t nframes = (framecnt_t) floor (Config->get_audio_playback_buffer_seconds() * frame_rate);
|
|
|
|
_mixdown_buffers.clear ();
|
|
_gain_buffers.clear ();
|
|
|
|
while (_mixdown_buffers.size() < level) {
|
|
_mixdown_buffers.push_back (boost::shared_ptr<Sample> (new Sample[nframes]));
|
|
_gain_buffers.push_back (boost::shared_ptr<gain_t> (new gain_t[nframes]));
|
|
}
|
|
}
|