Remove unnecessary 0 checks before delete; see http://www.parashift.com/c++-faq-lite...
[ardour.git] / libs / ardour / audiosource.cc
index ae9713bcd3b1c92de7485b0384fa4cc43f1ff955..b8366e0ac038a70e1d92e8fed326b57ed7a93cde 100644 (file)
 #include <ctime>
 #include <cmath>
 #include <iomanip>
+#include <fstream>
 #include <algorithm>
 #include <vector>
 
+#include <glibmm/fileutils.h>
+#include <glibmm/miscutils.h>
+
 #include <pbd/xml++.h>
 #include <pbd/pthread_utils.h>
 
 #include <ardour/audiosource.h>
 #include <ardour/cycle_timer.h>
+#include <ardour/session.h>
+#include <ardour/transient_detector.h>
 
 #include "i18n.h"
 
 using namespace std;
 using namespace ARDOUR;
 using namespace PBD;
+using Glib::ustring;
 
 bool AudioSource::_build_missing_peakfiles = false;
 bool AudioSource::_build_peakfiles = false;
 
-AudioSource::AudioSource (Session& s, string name)
-       : Source (s, name)
+#define _FPP 256
+
+AudioSource::AudioSource (Session& s, ustring name)
+       : Source (s, name, DataType::AUDIO)
 {
        _peaks_built = false;
        _peak_byte_max = 0;
@@ -61,6 +70,7 @@ AudioSource::AudioSource (Session& s, string name)
 AudioSource::AudioSource (Session& s, const XMLNode& node) 
        : Source (s, node)
 {
+       
        _peaks_built = false;
        _peak_byte_max = 0;
        peakfile = -1;
@@ -87,9 +97,7 @@ AudioSource::~AudioSource ()
                ::close (peakfile);
        }
 
-       if (peak_leftovers) {
-               delete [] peak_leftovers;
-       }
+       delete [] peak_leftovers;
 }
 
 XMLNode&
@@ -126,7 +134,7 @@ bool
 AudioSource::peaks_ready (sigc::slot<void> the_slot, sigc::connection& conn) const
 {
        bool ret;
-       Glib::Mutex::Lock lm (_lock);
+       Glib::Mutex::Lock lm (_peaks_ready_lock);
 
        /* check to see if the peak data is ready. if not
           connect the slot while still holding the lock.
@@ -157,11 +165,11 @@ AudioSource::touch_peakfile ()
 }
 
 int
-AudioSource::rename_peakfile (string newpath)
+AudioSource::rename_peakfile (ustring newpath)
 {
        /* caller must hold _lock */
 
-       string oldpath = peakpath;
+       ustring oldpath = peakpath;
 
        if (access (oldpath.c_str(), F_OK) == 0) {
                if (rename (oldpath.c_str(), newpath.c_str()) != 0) {
@@ -176,55 +184,52 @@ AudioSource::rename_peakfile (string newpath)
 }
 
 int
-AudioSource::initialize_peakfile (bool newfile, string audio_path)
+AudioSource::initialize_peakfile (bool newfile, ustring audio_path)
 {
        struct stat statbuf;
 
        peakpath = peak_path (audio_path);
 
-       /* Nasty band-aid for older sessions that were created before we
-          used libsndfile for all audio files.
-       */
+       /* if the peak file should be there, but isn't .... */
        
-       if (!newfile && access (peakpath.c_str(), R_OK) != 0) {
-               string str = old_peak_path (audio_path);
-               if (access (str.c_str(), R_OK) == 0) {
-                       peakpath = str;
-               }
+       if (!newfile && !Glib::file_test (peakpath.c_str(), Glib::FILE_TEST_EXISTS)) {
+               peakpath = find_broken_peakfile (peakpath, audio_path);
        }
 
-       if (newfile) {
-
-               if (!_build_peakfiles) {
-                       return 0;
+       if (stat (peakpath.c_str(), &statbuf)) {
+               if (errno != ENOENT) {
+                       /* it exists in the peaks dir, but there is some kind of error */
+                       
+                       error << string_compose(_("AudioSource: cannot stat peakfile \"%1\""), peakpath) << endmsg;
+                       return -1;
                }
 
+               /* peakfile does not exist */
+               
                _peaks_built = false;
-
+               
        } else {
-
-               if (stat (peakpath.c_str(), &statbuf)) {
-                       if (errno != ENOENT) {
-                               /* it exists in the peaks dir, but there is some kind of error */
-                               
-                               error << string_compose(_("AudioSource: cannot stat peakfile \"%1\""), peakpath) << endmsg;
-                               return -1;
-                       }
-                       
+               
+               /* we found it in the peaks dir, so check it out */
+               
+               if (statbuf.st_size == 0 || ((nframes_t) statbuf.st_size < ((length() / _FPP) * sizeof (PeakData)))) {
+                       // empty
                        _peaks_built = false;
-
                } else {
+                       // Check if the audio file has changed since the peakfile was built.
+                       struct stat stat_file;
+                       int err = stat (audio_path.c_str(), &stat_file);
                        
-                       /* we found it in the peaks dir, so check it out */
-
-                       if (statbuf.st_size == 0) {
+                       if (err) {
                                _peaks_built = false;
+                               _peak_byte_max = 0;
                        } else {
-                               // Check if the audio file has changed since the peakfile was built.
-                               struct stat stat_file;
-                               int err = stat (audio_path.c_str(), &stat_file);
-                               
-                               if (!err && stat_file.st_mtime > statbuf.st_mtime){
+
+                               /* allow 6 seconds slop on checking peak vs. file times because of various
+                                  disk action "races"
+                               */
+
+                               if (stat_file.st_mtime > statbuf.st_mtime && (stat_file.st_mtime - statbuf.st_mtime > 6)) {
                                        _peaks_built = false;
                                        _peak_byte_max = 0;
                                } else {
@@ -256,8 +261,15 @@ AudioSource::write (Sample *dst, nframes_t cnt)
        return write_unlocked (dst, cnt);
 }
 
-int 
+int
 AudioSource::read_peaks (PeakData *peaks, nframes_t npeaks, nframes_t start, nframes_t cnt, double samples_per_visual_peak) const
+{
+       return read_peaks_with_fpp (peaks, npeaks, start, cnt, samples_per_visual_peak, _FPP);
+}
+
+int 
+AudioSource::read_peaks_with_fpp (PeakData *peaks, nframes_t npeaks, nframes_t start, nframes_t cnt, 
+                                 double samples_per_visual_peak, nframes_t samples_per_file_peak) const
 {
        Glib::Mutex::Lock lm (_lock);
        double scale;
@@ -272,7 +284,7 @@ AudioSource::read_peaks (PeakData *peaks, nframes_t npeaks, nframes_t start, nfr
        Sample* raw_staging = 0;
        int _peakfile = -1;
 
-       expected_peaks = (cnt / (double) frames_per_peak);
+       expected_peaks = (cnt / (double) samples_per_file_peak);
        scale = npeaks/expected_peaks;
 
 #undef DEBUG_READ_PEAKS
@@ -327,12 +339,12 @@ AudioSource::read_peaks (PeakData *peaks, nframes_t npeaks, nframes_t start, nfr
 
        if (scale == 1.0) {
 
-               off_t first_peak_byte = (start / frames_per_peak) * sizeof (PeakData);
+               off_t first_peak_byte = (start / samples_per_file_peak) * sizeof (PeakData);
 
                /* open, read, close */
 
                if ((_peakfile = ::open (peakpath.c_str(), O_RDONLY, 0664)) < 0) {
-                       error << string_compose(_("AudioSource: cannot open peakpath \"%1\" (%2)"), peakpath, strerror (errno)) << endmsg;
+                       error << string_compose(_("AudioSource: cannot open peakpath (a) \"%1\" (%2)"), peakpath, strerror (errno)) << endmsg;
                        return -1;
                }
 
@@ -391,10 +403,10 @@ AudioSource::read_peaks (PeakData *peaks, nframes_t npeaks, nframes_t start, nfr
                /* compute the rounded up frame position  */
        
                nframes_t current_frame = start;
-               nframes_t current_stored_peak = (nframes_t) ceil (current_frame / (double) frames_per_peak);
+               nframes_t current_stored_peak = (nframes_t) ceil (current_frame / (double) samples_per_file_peak);
                uint32_t       next_visual_peak  = (uint32_t) ceil (current_frame / samples_per_visual_peak);
                double         next_visual_peak_frame = next_visual_peak * samples_per_visual_peak;
-               uint32_t       stored_peak_before_next_visual_peak = (nframes_t) next_visual_peak_frame / frames_per_peak;
+               uint32_t       stored_peak_before_next_visual_peak = (nframes_t) next_visual_peak_frame / samples_per_file_peak;
                uint32_t       nvisual_peaks = 0;
                uint32_t       stored_peaks_read = 0;
                uint32_t       i = 0;
@@ -406,7 +418,7 @@ AudioSource::read_peaks (PeakData *peaks, nframes_t npeaks, nframes_t start, nfr
                /* open ... close during out: handling */
 
                if ((_peakfile = ::open (peakpath.c_str(), O_RDONLY, 0664)) < 0) {
-                       error << string_compose(_("AudioSource: cannot open peakpath \"%1\" (%2)"), peakpath, strerror (errno)) << endmsg;
+                       error << string_compose(_("AudioSource: cannot open peakpath (b) \"%1\" (%2)"), peakpath, strerror (errno)) << endmsg;
                        return 0;
                }
 
@@ -415,7 +427,7 @@ AudioSource::read_peaks (PeakData *peaks, nframes_t npeaks, nframes_t start, nfr
                        if (i == stored_peaks_read) {
 
                                uint32_t       start_byte = current_stored_peak * sizeof(PeakData);
-                               tnp = min ((_length/frames_per_peak - current_stored_peak), (nframes_t) expected_peaks);
+                               tnp = min ((_length/samples_per_file_peak - current_stored_peak), (nframes_t) expected_peaks);
                                to_read = min (chunksize, tnp);
                                
 #ifdef DEBUG_READ_PEAKS
@@ -438,7 +450,7 @@ AudioSource::read_peaks (PeakData *peaks, nframes_t npeaks, nframes_t start, nfr
                                             << ')'
                                             << " at start_byte = " << start_byte 
                                             << " _length = " << _length << " versus len = " << fend
-                                            << " expected maxpeaks = " << (_length - current_frame)/frames_per_peak
+                                            << " expected maxpeaks = " << (_length - current_frame)/samples_per_file_peak
                                             << " npeaks was " << npeaks
                                             << endl;
                                        goto out;
@@ -467,7 +479,7 @@ AudioSource::read_peaks (PeakData *peaks, nframes_t npeaks, nframes_t start, nfr
 
                        //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 / frames_per_peak; 
+                       stored_peak_before_next_visual_peak = (uint32_t) next_visual_peak_frame / samples_per_file_peak; 
                }
 
                if (zero_fill) {
@@ -559,13 +571,8 @@ AudioSource::read_peaks (PeakData *peaks, nframes_t npeaks, nframes_t start, nfr
                close (_peakfile);
        }
 
-       if (staging) {
-               delete [] staging;
-       } 
-
-       if (raw_staging) {
-               delete [] raw_staging;
-       }
+       delete [] staging;
+       delete [] raw_staging;
 
 #ifdef DEBUG_READ_PEAKS
        cerr << "RP DONE\n";
@@ -581,9 +588,11 @@ AudioSource::build_peaks_from_scratch ()
 {
        nframes_t current_frame;
        nframes_t cnt;
-       Sample buf[frames_per_peak];
+       Sample* buf = 0;
        nframes_t frames_read;
        nframes_t frames_to_read;
+       const nframes_t bufsize = 65536; // 256kB per disk read for mono data is about ideal
+
        int ret = -1;
 
        {
@@ -592,45 +601,47 @@ AudioSource::build_peaks_from_scratch ()
                Glib::Mutex::Lock lp (_lock);
                
                if (prepare_for_peakfile_writes ()) {
-                       return -1;
+                       goto out;
                }
                
                current_frame = 0;
                cnt = _length;
                _peaks_built = false;
+               buf = new Sample[bufsize];
                
                while (cnt) {
                        
-                       frames_to_read = min (frames_per_peak, cnt);
+                       frames_to_read = min (bufsize, cnt);
 
                        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 ();
+                               done_with_peakfile_writes (false);
                                goto out;
                        }
 
-                       if (compute_and_write_peaks (buf, current_frame, frames_read, true)) {
+                       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();
-                       _peaks_built = true;
                } 
 
-               done_with_peakfile_writes ();
+               done_with_peakfile_writes ((cnt == 0));
        }
-
-       /* lock no longer held, safe to signal */
-
-       if (_peaks_built) {
-               PeaksReady (); /* EMIT SIGNAL */
-               ret = 0;
+       
+       {
+               Glib::Mutex::Lock lm (_peaks_ready_lock);
+               
+               if (_peaks_built) {
+                       PeaksReady (); /* EMIT SIGNAL */
+                       ret = 0;
+               }
        }
 
   out:
@@ -638,6 +649,8 @@ AudioSource::build_peaks_from_scratch ()
                unlink (peakpath.c_str());
        }
 
+       delete [] buf;
+
        return ret;
 }
 
@@ -645,17 +658,21 @@ int
 AudioSource::prepare_for_peakfile_writes ()
 {
        if ((peakfile = ::open (peakpath.c_str(), O_RDWR|O_CREAT, 0664)) < 0) {
-               error << string_compose(_("AudioSource: cannot open peakpath \"%1\" (%2)"), peakpath, strerror (errno)) << endmsg;
+               error << string_compose(_("AudioSource: cannot open peakpath (c) \"%1\" (%2)"), peakpath, strerror (errno)) << endmsg;
                return -1;
        }
        return 0;
 }
 
 void
-AudioSource::done_with_peakfile_writes ()
+AudioSource::done_with_peakfile_writes (bool done)
 {
        if (peak_leftover_cnt) {
-               compute_and_write_peaks (0, 0, 0, true);
+               compute_and_write_peaks (0, 0, 0, true, false, _FPP);
+       }
+       
+       if (done) {
+               _peaks_built = true;
        }
 
        if (peakfile >= 0) {
@@ -664,16 +681,20 @@ AudioSource::done_with_peakfile_writes ()
        }
 }
 
-static bool wrote_xmax = false;
+int
+AudioSource::compute_and_write_peaks (Sample* buf, nframes_t first_frame, nframes_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, nframes_t first_frame, nframes_t cnt, bool force)
+AudioSource::compute_and_write_peaks (Sample* buf, nframes_t first_frame, nframes_t cnt, bool force, 
+                                     bool intermediate_peaks_ready, nframes_t fpp)
 {
        Sample* buf2 = 0;
-       Sample xmin, xmax;
        nframes_t to_do;
        uint32_t  peaks_computed;
-       PeakData* peakbuf;
+       PeakData* peakbuf = 0;
        int ret = -1;
        nframes_t current_frame;
        nframes_t frames_done;
@@ -689,8 +710,6 @@ AudioSource::compute_and_write_peaks (Sample* buf, nframes_t first_frame, nframe
 
                if (first_frame != peak_leftover_frame + peak_leftover_cnt) {
 
-                       cerr << "seek, flush out " << peak_leftover_cnt << endl;
-
                        /* 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.
@@ -700,13 +719,8 @@ AudioSource::compute_and_write_peaks (Sample* buf, nframes_t first_frame, nframe
                        
                        x.min = peak_leftovers[0];
                        x.max = peak_leftovers[0];
-                       
-                       for (nframes_t n = 1; n < peak_leftover_cnt; ++n) {
-                               x.max = max (x.max, peak_leftovers[n]);
-                               x.min = min (x.min, peak_leftovers[n]);
-                       }
 
-                       off_t byte = (peak_leftover_frame / frames_per_peak) * sizeof (PeakData);
+                       off_t byte = (peak_leftover_frame / fpp) * sizeof (PeakData);
 
                        if (::pwrite (peakfile, &x, sizeof (PeakData), byte) != sizeof (PeakData)) {
                                error << string_compose(_("%1: could not write peak file data (%2)"), _name, strerror (errno)) << endmsg;
@@ -715,8 +729,13 @@ AudioSource::compute_and_write_peaks (Sample* buf, nframes_t first_frame, nframe
 
                        _peak_byte_max = max (_peak_byte_max, (off_t) (byte + sizeof(PeakData)));
 
-                       PeakRangeReady (peak_leftover_frame, peak_leftover_cnt); /* EMIT SIGNAL */
-                       PeaksReady (); /* EMIT SIGNAL */
+                       { 
+                               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 */
 
@@ -753,7 +772,7 @@ AudioSource::compute_and_write_peaks (Sample* buf, nframes_t first_frame, nframe
                to_do = cnt;
        }
 
-       peakbuf = new PeakData[(to_do/frames_per_peak)+1];
+       peakbuf = new PeakData[(to_do/fpp)+1];
        peaks_computed = 0;
        current_frame = first_frame;
        frames_done = 0;
@@ -761,15 +780,13 @@ AudioSource::compute_and_write_peaks (Sample* buf, nframes_t first_frame, nframe
        while (to_do) {
 
                /* if some frames were passed in (i.e. we're not flushing leftovers)
-                  and there are less than frames_per_peak to do, save them till
+                  and there are less than fpp to do, save them till
                   next time
                */
 
-               if (force && (to_do < frames_per_peak)) {
+               if (force && (to_do < fpp)) {
                        /* keep the left overs around for next time */
 
-                       cerr << "save " << to_do << " leftovers\n";
-
                        if (peak_leftover_size < to_do) {
                                delete [] peak_leftovers;
                                peak_leftovers = new Sample[to_do];
@@ -784,19 +801,12 @@ AudioSource::compute_and_write_peaks (Sample* buf, nframes_t first_frame, nframe
                        break;
                }
                        
-               nframes_t this_time = min (frames_per_peak, to_do);
-
-               xmin = buf[0];
-               xmax = buf[0];
+               nframes_t this_time = min (fpp, to_do);
 
-               for (nframes_t n = 1; n < this_time; ++n) {
-                       xmax = max (xmax, buf[n]);
-                       xmin = min (xmin, buf[n]);
-               }
-               
+               peakbuf[peaks_computed].max = buf[0];
+               peakbuf[peaks_computed].min = buf[0];
 
-               peakbuf[peaks_computed].max = xmax;
-               peakbuf[peaks_computed].min = xmin;
+               ARDOUR::find_peaks (buf+1, this_time-1, &peakbuf[peaks_computed].min, &peakbuf[peaks_computed].max);
 
                peaks_computed++;
                buf += this_time;
@@ -805,7 +815,7 @@ AudioSource::compute_and_write_peaks (Sample* buf, nframes_t first_frame, nframe
                current_frame += this_time;
        }
                
-       first_peak_byte = (first_frame / frames_per_peak) * sizeof (PeakData);
+       first_peak_byte = (first_frame / fpp) * sizeof (PeakData);
 
        if (can_truncate_peaks()) {
 
@@ -832,17 +842,19 @@ AudioSource::compute_and_write_peaks (Sample* buf, nframes_t first_frame, nframe
        _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 */
-               PeaksReady (); /* EMIT SIGNAL */
+               if (intermediate_peaks_ready) {
+                       PeaksReady (); /* EMIT SIGNAL */
+               }
        }
 
        ret = 0;
 
   out:
        delete [] peakbuf;
-       if (buf2) {
-               delete [] buf2;
-       }
+       delete [] buf2;
+
        return ret;
 }
 
@@ -865,7 +877,7 @@ AudioSource::truncate_peakfile ()
 }
 
 bool
-AudioSource::file_changed (string path)
+AudioSource::file_changed (ustring path)
 {
        struct stat stat_file;
        struct stat stat_peak;
@@ -885,7 +897,7 @@ AudioSource::available_peaks (double zoom_factor) const
 {
        off_t end;
 
-       if (zoom_factor < frames_per_peak) {
+       if (zoom_factor < _FPP) {
                return length(); // peak data will come from the audio file
        } 
        
@@ -897,7 +909,7 @@ AudioSource::available_peaks (double zoom_factor) const
 
        end = _peak_byte_max;
 
-       return (end/sizeof(PeakData)) * frames_per_peak;
+       return (end/sizeof(PeakData)) * _FPP;
 }
 
 void