fix (no)use of offset in AudioEngine::get_sync_offset()

[ardour.git] / libs / ardour / session_butler.cc

diff --git a/libs/ardour/session_butler.cc b/libs/ardour/session_butler.cc
index ec5de23caffbc537f74fb58719a0b15e614a6a92..59fe9e29a8b1f8c06cfee8d1f292e6d72e606deb 100644 (file)
--- a/libs/ardour/session_butler.cc
+++ b/libs/ardour/session_butler.cc
@@ -27,16 +27,18 @@
 
 #include <glibmm/thread.h>
 
-#include <pbd/error.h>
-#include <pbd/pthread_utils.h>
-#include <pbd/stacktrace.h>
-
-#include <ardour/configuration.h>
-#include <ardour/audioengine.h>
-#include <ardour/session.h>
-#include <ardour/audio_diskstream.h>
-#include <ardour/crossfade.h>
-#include <ardour/timestamps.h>
+#include "pbd/error.h"
+#include "pbd/pthread_utils.h"
+#include "pbd/stacktrace.h"
+
+#include "ardour/audio_diskstream.h"
+#include "ardour/audioengine.h"
+#include "ardour/configuration.h"
+#include "ardour/crossfade.h"
+#include "ardour/io.h"
+#include "ardour/midi_diskstream.h"
+#include "ardour/session.h"
+#include "ardour/timestamps.h"
 
 #include "i18n.h"
 
@@ -76,6 +78,7 @@ Session::start_butler_thread ()
         * (i.e. how many MIDI bytes we might see in a cycle)
         */
        midi_dstream_buffer_size = (uint32_t) floor (Config->get_midi_track_buffer_seconds() * (float)frame_rate());
+       MidiDiskstream::set_readahead_frames ((nframes_t) (Config->get_midi_readahead() * (float) frame_rate()));
        
        Crossfade::set_buffer_size (audio_dstream_buffer_size);
 
@@ -160,7 +163,7 @@ Session::wait_till_butler_finished ()
 void *
 Session::_butler_thread_work (void* arg)
 {
-       PBD::ThreadCreated (pthread_self(), X_("Butler"));
+       PBD::notify_gui_about_thread_creation (pthread_self(), X_("Butler"));
        return ((Session *) arg)->butler_thread_work ();
        return 0;
 }
@@ -171,7 +174,8 @@ Session::butler_thread_work ()
        uint32_t err = 0;
        int32_t bytes;
        bool compute_io;
-       struct timeval begin, end;
+       microseconds_t begin, end;
+
        struct pollfd pfd[1];
        bool disk_work_outstanding = false;
        DiskstreamList::iterator i;
@@ -248,7 +252,7 @@ Session::butler_thread_work ()
                bytes = 0;
                compute_io = true;
 
-               gettimeofday (&begin, 0);
+               begin = get_microseconds();
 
                boost::shared_ptr<DiskstreamList> dsl = diskstreams.reader ();
 
@@ -262,7 +266,7 @@ Session::butler_thread_work ()
 
                        /* don't read inactive tracks */
 
-                       IO* io = ds->io();
+                       boost::shared_ptr<IO> io = ds->io();
                        
                        if (io && !io->active()) {
                                continue;
@@ -295,17 +299,16 @@ Session::butler_thread_work ()
                }
 
                if (compute_io) {
-                       gettimeofday (&end, 0);
-                       
-                       double b = begin.tv_sec  + (begin.tv_usec/1000000.0);
-                       double e = end.tv_sec + (end.tv_usec / 1000000.0);
-                       
-                       _read_data_rate = bytes / (e - b);
+                       end = get_microseconds(); 
+                       if(end-begin > 0) {
+                       _read_data_rate = (float) bytes / (float) (end - begin);
+                       } else { _read_data_rate = 0; // infinity better
+                        }
                }
 
                bytes = 0;
                compute_io = true;
-               gettimeofday (&begin, 0);
+               begin = get_microseconds();
 
                for (i = dsl->begin(); !transport_work_requested() && butler_should_run && i != dsl->end(); ++i) {
                        // cerr << "write behind for " << (*i)->name () << endl;
@@ -313,7 +316,7 @@ Session::butler_thread_work ()
                        /* note that we still try to flush diskstreams attached to inactive routes
                         */
                        
-                       switch ((*i)->do_flush (Session::ButlerContext)) {
+                       switch ((*i)->do_flush (ButlerContext)) {
                        case 0:
                                bytes += (*i)->write_data_count();
                                break;
@@ -349,12 +352,13 @@ Session::butler_thread_work ()
                }
 
                if (compute_io) {
-                       gettimeofday (&end, 0);
-                       
-                       double b = begin.tv_sec  + (begin.tv_usec/1000000.0);
-                       double e = end.tv_sec + (end.tv_usec / 1000000.0);
-                       
-                       _write_data_rate = bytes / (e - b);
+                       // there are no apparent users for this calculation?
+                       end = get_microseconds();
+                       if(end-begin > 0) {
+                       _write_data_rate = (float) bytes / (float) (end - begin);
+                       } else {
+                       _write_data_rate = 0; // Well, infinity would be better
+                       }
                }
                
                if (!disk_work_outstanding) {
@@ -421,7 +425,7 @@ Session::read_data_rate () const
        /* disk i/o in excess of 10000MB/sec indicate the buffer cache
           in action. ignore it.
        */
-       return _read_data_rate > 10485760000.0f ? 0.0f : _read_data_rate;
+       return _read_data_rate > 10485.7600000f ? 0.0f : _read_data_rate;
 }
 
 float
@@ -430,7 +434,7 @@ Session::write_data_rate () const
        /* disk i/o in excess of 10000MB/sec indicate the buffer cache
           in action. ignore it.
        */
-       return _write_data_rate > 10485760000.0f ? 0.0f : _write_data_rate;
+       return _write_data_rate > 10485.7600000f ? 0.0f : _write_data_rate;
 }
 
 uint32_t