*/
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <poll.h>
+#include "pbd/error.h"
+#include "pbd/pthread_utils.h"
#include "ardour/butler.h"
+#include "ardour/crossfade.h"
+#include "ardour/io.h"
+#include "ardour/midi_diskstream.h"
+#include "ardour/session.h"
+#include "ardour/track.h"
+#include "ardour/auditioner.h"
+
+#include "i18n.h"
+
+using namespace PBD;
+
+static float _read_data_rate;
+static float _write_data_rate;
namespace ARDOUR {
-Butler::Butler()
- : thread(0)
+Butler::Butler(Session& s)
+ : SessionHandleRef (s)
+ , thread(0)
+ , audio_dstream_capture_buffer_size(0)
+ , audio_dstream_playback_buffer_size(0)
+ , midi_dstream_buffer_size(0)
+ , pool_trash(16)
{
g_atomic_int_set(&should_do_transport_work, 0);
+ SessionEvent::pool->set_trash (&pool_trash);
+
+ Config->ParameterChanged.connect_same_thread (*this, boost::bind (&Butler::config_changed, this, _1));
}
Butler::~Butler()
{
+ terminate_thread ();
}
+void
+Butler::config_changed (std::string p)
+{
+ if (p == "playback-buffer-seconds") {
+ /* size is in Samples, not bytes */
+ audio_dstream_playback_buffer_size = (uint32_t) floor (Config->get_audio_playback_buffer_seconds() * _session.frame_rate());
+ _session.adjust_playback_buffering ();
+ } else if (p == "capture-buffer-seconds") {
+ audio_dstream_capture_buffer_size = (uint32_t) floor (Config->get_audio_capture_buffer_seconds() * _session.frame_rate());
+ _session.adjust_capture_buffering ();
+ }
+}
+
+int
+Butler::start_thread()
+{
+ const float rate = (float)_session.frame_rate();
+
+ /* size is in Samples, not bytes */
+ audio_dstream_capture_buffer_size = (uint32_t) floor (Config->get_audio_capture_buffer_seconds() * rate);
+ audio_dstream_playback_buffer_size = (uint32_t) floor (Config->get_audio_playback_buffer_seconds() * rate);
+
+ /* size is in bytes
+ * XXX: Jack needs to tell us the MIDI buffer size
+ * (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() * rate);
+
+ MidiDiskstream::set_readahead_frames ((nframes_t)(Config->get_midi_readahead() * rate));
+
+ Crossfade::set_buffer_size (audio_dstream_playback_buffer_size);
+
+ should_run = false;
+
+ if (pipe (request_pipe)) {
+ error << string_compose(_("Cannot create transport request signal pipe (%1)"),
+ strerror (errno)) << endmsg;
+ return -1;
+ }
+
+ if (fcntl (request_pipe[0], F_SETFL, O_NONBLOCK)) {
+ error << string_compose(_("UI: cannot set O_NONBLOCK on butler request pipe (%1)"),
+ strerror (errno)) << endmsg;
+ return -1;
+ }
+
+ if (fcntl (request_pipe[1], F_SETFL, O_NONBLOCK)) {
+ error << string_compose(_("UI: cannot set O_NONBLOCK on butler request pipe (%1)"),
+ strerror (errno)) << endmsg;
+ return -1;
+ }
+
+ if (pthread_create_and_store ("disk butler", &thread, _thread_work, this)) {
+ error << _("Session: could not create butler thread") << endmsg;
+ return -1;
+ }
+
+ //pthread_detach (thread);
+
+ return 0;
+}
+
+void
+Butler::terminate_thread ()
+{
+ if (thread) {
+ void* status;
+ const char c = Request::Quit;
+ (void) ::write (request_pipe[1], &c, 1);
+ pthread_join (thread, &status);
+ }
+}
+
+void *
+Butler::_thread_work (void* arg)
+{
+ SessionEvent::create_per_thread_pool ("butler events", 64);
+ pthread_set_name (X_("butler"));
+ return ((Butler *) arg)->thread_work ();
+}
+
+void *
+Butler::thread_work ()
+{
+ uint32_t err = 0;
+ int32_t bytes;
+ bool compute_io;
+ microseconds_t begin, end;
+
+ struct pollfd pfd[1];
+ bool disk_work_outstanding = false;
+ RouteList::iterator i;
+
+ while (true) {
+ pfd[0].fd = request_pipe[0];
+ pfd[0].events = POLLIN|POLLERR|POLLHUP;
+
+ if (poll (pfd, 1, (disk_work_outstanding ? 0 : -1)) < 0) {
+
+ if (errno == EINTR) {
+ continue;
+ }
+
+ error << string_compose (_("poll on butler request pipe failed (%1)"),
+ strerror (errno))
+ << endmsg;
+ break;
+ }
+
+ if (pfd[0].revents & ~POLLIN) {
+ error << string_compose (_("Error on butler thread request pipe: fd=%1 err=%2"), pfd[0].fd, pfd[0].revents) << endmsg;
+ break;
+ }
+
+ if (pfd[0].revents & POLLIN) {
+
+ char req;
+
+ /* empty the pipe of all current requests */
+
+ while (1) {
+ size_t nread = ::read (request_pipe[0], &req, sizeof (req));
+ if (nread == 1) {
+
+ switch ((Request::Type) req) {
+
+ case Request::Wake:
+ break;
+
+ case Request::Run:
+ should_run = true;
+ break;
+
+ case Request::Pause:
+ should_run = false;
+ break;
+
+ case Request::Quit:
+ pthread_exit_pbd (0);
+ /*NOTREACHED*/
+ break;
+
+ default:
+ break;
+ }
+
+ } else if (nread == 0) {
+ break;
+ } else if (errno == EAGAIN) {
+ break;
+ } else {
+ fatal << _("Error reading from butler request pipe") << endmsg;
+ /*NOTREACHED*/
+ }
+ }
+ }
+
+
+ bytes = 0;
+ compute_io = true;
+
+restart:
+ disk_work_outstanding = false;
+
+ if (transport_work_requested()) {
+ _session.butler_transport_work ();
+ }
+
+ begin = get_microseconds();
+
+ boost::shared_ptr<RouteList> rl = _session.get_routes();
+
+ RouteList rl_with_auditioner = *rl;
+ rl_with_auditioner.push_back (_session.the_auditioner());
+
+// for (i = dsl->begin(); i != dsl->end(); ++i) {
+// cerr << "BEFORE " << (*i)->name() << ": pb = " << (*i)->playback_buffer_load() << " cp = " << (*i)->capture_buffer_load() << endl;
+// }
+
+ for (i = rl_with_auditioner.begin(); !transport_work_requested() && should_run && i != rl_with_auditioner.end(); ++i) {
+
+ boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
+ if (!tr) {
+ continue;
+ }
+
+ /* don't read inactive tracks */
+
+ boost::shared_ptr<IO> io = tr->input ();
+
+ if (io && !io->active()) {
+ continue;
+ }
+
+ switch (tr->do_refill ()) {
+ case 0:
+ bytes += tr->read_data_count();
+ break;
+ case 1:
+ bytes += tr->read_data_count();
+ disk_work_outstanding = true;
+ break;
+
+ default:
+ compute_io = false;
+ error << string_compose(_("Butler read ahead failure on dstream %1"), (*i)->name()) << endmsg;
+ break;
+ }
+
+ }
+
+ if (i != rl_with_auditioner.begin() && i != rl_with_auditioner.end()) {
+ /* we didn't get to all the streams */
+ disk_work_outstanding = true;
+ }
+
+ if (!err && transport_work_requested()) {
+ goto restart;
+ }
+
+ if (compute_io) {
+ 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;
+ begin = get_microseconds();
+
+ for (i = rl->begin(); !transport_work_requested() && should_run && i != rl->end(); ++i) {
+ // cerr << "write behind for " << (*i)->name () << endl;
+
+ boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
+ if (!tr) {
+ continue;
+ }
+
+ /* note that we still try to flush diskstreams attached to inactive routes
+ */
+
+ switch (tr->do_flush (ButlerContext)) {
+ case 0:
+ bytes += tr->write_data_count();
+ break;
+ case 1:
+ bytes += tr->write_data_count();
+ disk_work_outstanding = true;
+ break;
+
+ default:
+ err++;
+ compute_io = false;
+ error << string_compose(_("Butler write-behind failure on dstream %1"), (*i)->name()) << endmsg;
+ /* don't break - try to flush all streams in case they
+ are split across disks.
+ */
+ }
+ }
+
+ if (err && _session.actively_recording()) {
+ /* stop the transport and try to catch as much possible
+ captured state as we can.
+ */
+ _session.request_stop ();
+ }
+
+ if (i != rl->begin() && i != rl->end()) {
+ /* we didn't get to all the streams */
+ disk_work_outstanding = true;
+ }
+
+ if (!err && transport_work_requested()) {
+ goto restart;
+ }
+
+ if (compute_io) {
+ // 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) {
+ _session.refresh_disk_space ();
+ }
+
+
+ {
+ Glib::Mutex::Lock lm (request_lock);
+
+ if (should_run && (disk_work_outstanding || transport_work_requested())) {
+// for (DiskstreamList::iterator i = dsl->begin(); i != dsl->end(); ++i) {
+// cerr << "AFTER " << (*i)->name() << ": pb = " << (*i)->playback_buffer_load() << " cp = " << (*i)->capture_buffer_load() << endl;
+// }
+
+ goto restart;
+ }
+
+ paused.signal();
+ }
+
+ empty_pool_trash ();
+ }
+
+ pthread_exit_pbd (0);
+ /*NOTREACHED*/
+ return (0);
+}
+
+void
+Butler::schedule_transport_work ()
+{
+ g_atomic_int_inc (&should_do_transport_work);
+ summon ();
+}
+
+void
+Butler::summon ()
+{
+ char c = Request::Run;
+ (void) ::write (request_pipe[1], &c, 1);
+}
+
+void
+Butler::stop ()
+{
+ Glib::Mutex::Lock lm (request_lock);
+ char c = Request::Pause;
+ (void) ::write (request_pipe[1], &c, 1);
+ paused.wait(request_lock);
+}
+
+void
+Butler::wait_until_finished ()
+{
+ Glib::Mutex::Lock lm (request_lock);
+ char c = Request::Wake;
+ (void) ::write (request_pipe[1], &c, 1);
+ paused.wait(request_lock);
+}
+
+bool
+Butler::transport_work_requested () const
+{
+ return g_atomic_int_get(&should_do_transport_work);
+}
+
+float
+Butler::read_data_rate () const
+{
+ /* disk i/o in excess of 10000MB/sec indicate the buffer cache
+ in action. ignore it.
+ */
+ return _read_data_rate > 10485.7600000f ? 0.0f : _read_data_rate;
+}
+
+float
+Butler::write_data_rate () const
+{
+ /* disk i/o in excess of 10000MB/sec indicate the buffer cache
+ in action. ignore it.
+ */
+ return _write_data_rate > 10485.7600000f ? 0.0f : _write_data_rate;
+}
+
+void
+Butler::empty_pool_trash ()
+{
+ /* look in the trash, deleting empty pools until we come to one that is not empty */
+
+ RingBuffer<CrossThreadPool*>::rw_vector vec;
+ pool_trash.get_read_vector (&vec);
+
+ guint deleted = 0;
+
+ for (int i = 0; i < 2; ++i) {
+ for (guint j = 0; j < vec.len[i]; ++j) {
+ if (vec.buf[i][j]->empty()) {
+ delete vec.buf[i][j];
+ ++deleted;
+ } else {
+ /* found a non-empty pool, so stop deleting */
+ if (deleted) {
+ pool_trash.increment_read_idx (deleted);
+ }
+ return;
+ }
+ }
+ }
+
+ if (deleted) {
+ pool_trash.increment_read_idx (deleted);
+ }
+}
+
+void
+Butler::drop_references ()
+{
+ SessionEvent::pool->set_trash (0);
+}
+
+
} // namespace ARDOUR
+
projects / ardour.git / blobdiff