ChangeLog

2023-03-22  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 6.1 released.

	* Stability: Fix crash after wakeup in paused Roon mode.

	* Audio sources: Fix deferred audio source selection.

	* User interface: The busy flag is more reliable now. Double display
	  updates while navigating a list are avoided, speeding up the UI and
	  thus improving the UX.

	* Misc: Maintenance work.

2023-03-14  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 6.0 released.

	* Airable: Stream links from Airable are passed straight to the
	  player. It makes more sense to resolve them there and removes quite
	  some complexity from drcpd.

	* Stability: Fix a few minor bugs.

2022-11-30  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.32 released.

	* Debugging: Avoid a few false error messages.

	* Misc: Maintenance work.

2022-11-17  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.31 released.

	* Playback: Don't mess with the player's queue on stream stop if we
	  are not the controlling instance.

2022-10-28  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.30 released.

	* Playback: When skipping any stream in pause mode, automatically
	  leave pause mode and play the next stream.

	* Stability: Replace assertion with bug message when trying to enter
	  root directory while jumping to context.

2022-10-21  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.29 released.

	* Playback: When skipping app streams in pause mode, automatically
	  leave pause mode and play the next stream.

2022-10-14  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.28 released.

	* Playback: Fix handling of play and pause state. This avoids
	  displaying pause state while the player is actually playing.

	* Stability: Fix crash during startup and on audio source selection.

2022-09-05  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.27 released.

	* dbus: Do not send stream information to dcpd if the information
	  haven't changed. This avoids wasting a good deal of CPU cycles.

	* Misc: Fix uninitialized memory access.

	* Logging: Do not write buffering information to the log.

2022-08-16  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.26 released.

	* Playback: Handle streams dropped by streamplayer directly from
	  queue.

	* Unit tests: Fix failing tests.

	* Misc: Fix several linter warnings.

2022-04-07  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.25 released.

	* Playback: Skip over list items which have no URL associated with
	  them. This may happen with items returned by Airable or UPnP, in
	  case the corresponding list brokers fail to mark these items as
	  locked.

	* Playback: Send reasons for start and pause commands to streamplayer
	  for debugging purposes.

2021-10-19  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.24 released.

	* Airable: Avoid a crash in case OAuth is active and is supposed to
	  be activated again. This happens while being logged out from TIDAL,
	  and then logging out again.

2021-10-15  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.23 released.

	* Airable: Keep OAuth going between audio source switches.

	* Stability: Fix severe bug in meta data handling (bad memory
	  accesses). This bug was introduced in v5.22, rendering that version
	  useless for all practical purpuses.

	* Stability: Fix infinite loop during traversal of directory
	  structures of certain shapes.

	* Stability: Fix memory leak.

2021-10-11  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.22 released.

	* Player: Push meta data to streamplayer so that preset meta data
	  pulled from Airable is reported to REST API client.

2021-10-04  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.21 released.

	* Stability: Fix two crashes.

2021-10-01  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.20 released.

	* User interface: Button presses on appliance and remote control are
	  not sent directly to the active player while there is a REST API
	  client in control. This allows the REST API client to control
	  whether or not the command should be turned into action.

	* DCP: Preset meta data set via registers 78 and 238 to dcpd are not
	  sent via StreamInfo signal anymore. These data are sent by dcpd
	  along with the stream URL to the player queue. We have code already
	  which recognizes them, so all code related to StreamInfo signal
	  handling was removed.

2021-09-14  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.19 released.

	* Playback: Do not stop playing on series of errors.

	* Playback: Fix synchronization of DRCPD playback queue and
	  streamplayer gapless queue.

	* Playback: Slightly improve performance of skipping of unplayable
	  streams.

2021-09-08  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.18 released.

	* Airable: Deactivate repeated OAuth notification screen when leaving
	  the TIDAL audio source.

	* User interface: Fix flickering index indication in lists.

	* Internationalization: Fix build with Meson.

2021-08-26  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.17 released.

	* Airable: Support OAuth2 authentication as soon will be required by
	  TIDAL.

	* Audio sources: Support the new strbo.rest audio source which allows
	  REST API clients to access the stream player and the appliance
	  display directly.

	* User interface: Allow processes in the system to send errors that
	  cannot be caught in other ways. A new D-Bus interface has been added
	  for this, which drcpd monitors. Currently, only the Airable list
	  broker sends errors to support the user with detecting problems in
	  his network, and troubleshooting them.

	* Misc: Better log messages for certain runtime failures.

2021-06-28  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.16 released.

	* Player: Fix playback for a series of short tracks.

2021-05-12  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.15 released.

	* Stability: Fix freeze during high frequency UPnP server root list
	  updates (and generally, any high frequency list updates).

2021-05-07  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.14 released.

	* Stability: Fix a crash which occurred during high frequency UPnP
	  server root list updates.

2021-04-27  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.13 released.

	* Player: Dump new buffer information D-Bus signal sent around by
	  streamplayer to the log. These information are going only to the log
	  for now, not to the display.

2021-04-23  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.12 released.

	* Playback: Distribute CPU consumption caused by prefetching to avoid
	  stuttering playback during track changes.

2021-02-23  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.11 released.

	* Stability: Abort messages sent by list brokers are recognized as
	  such and handled as such now.

	* Stability: Crash on music service login error fixed (context jump
	  handling was bad, combined with race conditions in list brokers and
	  the missed abort messages).

	* User interface: If logging into a music service fails due to bad
	  credentials, then emit a corresponding error message in the right
	  place and time.

2021-02-11  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.10 released.

	* Playback: Fix handling of unplayable files. They should be skipped
	  properly now.

	* Misc: Fix various internal shortcomings.

2021-01-25  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.9 released.

	* Playback: Avoid crash on playback failure due to stream error.

2020-12-14  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.8 released.

	* Playback: Avoid crash when skipping quickly while in pause state.

2020-11-25  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.7 released.

	* Playback: Avoid crash on source selection while playing.

2020-11-23  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.6 released.

	* Playback: Fix handling of pause/play state.

	* Playback: Selected track via app is actually played, not the next or
	  the one following the next.

	* Playback: Fix a bug while skipping back and forth which caused the
	  skipping mechanism to stop working.

	* Stability: Hitting the blue search button while a list operation was
	  active caused the system to enter an infinite loop, flooding the log
	  and leaving the UI unresponsive. This has been fixed.

	* Stability: Fix several crashes while playing and skipping through a
	  list.

2020-10-30  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.5 released.

	* Stability: Fix two crashes related to playing from the app.

	* Stability: Fix another (very rare) crash happening at startup.

2020-10-28  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.4 released.

	* Stability: The whole D-Bus list management has been rewritten to
	  cope with the new flexibility of RNF calls. The old code base relied
	  on certain assumptions such as single-call-at-a-time, completion of
	  calls in specific order, and other things that were true in the old
	  implementation. Emulating overall behaviour to match the old
	  implementation would have been very complicated and misguided, so
	  instead the list filling and caching code has been rewritten to make
	  use of the added flexibility.

	* Stability: Avoid crash on play caused by deferencing a dangling
	  pointer.

	* Playback: Handling of dropped streams, especially during skipping,
	  has been improved. Streamplayer v5.2 or later is required to make
	  this work.

	* Misc: Fixed compiler warnings.

2020-03-24  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.3 released.

	* Stability: Avoid crash on invalid stream ID in play view.

	* Stability: Avoid crash when starting a stream from USB.

	* Stability: Avoid crash when browsing long UPnP server lists.

	* Meson: Several improvements and simplifications.

	* Misc: Fixed compiler warnings.

2020-03-04  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.2 released.

	* Playback: Fix meta data management for streams pushed in via app.

	* Playback: Fix handling of play/pause commands.

	* User interface: Avoid annoying "No data available" placeholder while
	  loading lists. It was an artifact added by the increased precision
	  and control over D-Bus calls since v5.0.

2020-02-28  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.1 released.

	* Playback: System can be used from app again.

	* Playback: System can be used from Roon again.

	* User interface: Meta data from app is displayed.

	* User interface: Avoid endless display of busy symbol.

	* Stability: Fixed several crashes and one memory leak.

2020-02-19  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 5.0 released.

	* D-Bus: Rewritten list navigation code. All potentially long-running
	  sycnhronous D-Bus method invocations were replaced by a completely
	  asynchronously working mechanism. The new code cannot trigger D-Bus
	  timeouts anymore (unless there is a true communication error) and
	  makes many things explicit (object to represent state and
	  expectations) which were implicit before (semi-globals, state
	  scattered across processes and D-Bus method call states).

	  A lot of code had to be changed or entirely rewritten, so this
	  version is expected to contain quite some bugs.

	* D-Bus: Rewritten streamplayer synchronization code. There were many
	  situations in which our old code full of guesswork was unable to
	  synchronize with streamplayer queue states. It worked before because
	  of the way list navigation and thus list playback worked, but the
	  change of communication style rendered the previous synchronization
	  useless in many places.

	* Build system: Support Meson.

	* Licensing: Changed license from GPLv3+ to GPLv2+.

	* Misc: Fixed many compiler and cppcheck warnings/bugs.

2019-03-14  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 4.18 released.

	* Playback: Proper synchronization with TAPSwitch for clean switching
	  of audio sources.

2018-12-17  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 4.17 released.

	* Logging: Send stop reason to stream player so that it can be emitted
	  to the log.

2018-09-20  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 4.16 released.

	* Internationalization: Reword Deezer idle screen message.

2018-07-13  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 4.15 released.

	* Roon view: Send screen update when switching from idle source to
	  Roon source. The Roon view was active at that time (it had to
	  because of pending events coming from Roon), so the screen
	  serialization was suppressed on audio source switch. We now enforce
	  the update.

	* Airable views: Fixed updating of view titles when switching back and
	  forth between Airable audio sources.

2018-06-19  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 4.14 released.

	* Audio sources: Adapted to changed D-Bus interfaces required for
	  Roon certification.

2018-04-17  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 4.13 released.

	* Playback: Proper handling and observation of deferred audio path
	  activation. Requires TAPSwitch v1.3 or later.

2018-03-16  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 4.12 released.

	* Internationalization: Improved handling of missing translations. In
	  case a language is selected for which there is no translation
	  available, the software falls back to US English. It should have
	  done this before anyway, but it didn't quite work.

	* Internationalization: Fixed dynamic translation of placeholder
	  list item shown while loading a list ("Loading...").

2018-03-12  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 4.11 released.

	* Internationalization: Add French and Italian translations.

2018-03-06  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 4.10 released.

	* Maintenance: Fix compilation with gcc 7.3.0.

	* Misc: Do not error out if markdown is not installed.

2018-02-06  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 4.9 released.

	* Roon: Fixed handling of play/pause commands coming from our
	  appliance on the one hand, and from the Roon app on the other hand.
	  For instance, we tried to continue playing a stream when pause was
	  pushed on Roon side if that stream has been paused and resume on
	  appliance side before.

	* Roon: Jump to Roon's idle screen when the appliance switches from
	  play view with Roon playing to the inactive view. This masks frozen
	  Roon display with wrong contents (play state is shown while the Roon
	  app is in pause state).

	* Airable: Fixed switching back and forth between TIDAL/Qobuz and
	  Internet Radio audio sources (Airable's root directory became
	  visible and browsable in case external music service credentials
	  were wrong or missing).

	* UI: Ignore navigational commands while Roon or App audio source is
	  active.

	* UI: Roon idle screen says, "Roon Ready" (not "Roon Ready (beta)").

2018-01-30  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 4.8 released.

	* Stability: Fixed possible crash due to uninitialized pointer.

2017-12-08  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 4.7 released.

	* Internationalization: Revert translation for one string so that a
	  hack on the SPI slave can continue to function.

2017-12-07  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 4.6 released.

	* Airable: The navigational state is kept while jumping between
	  different Airable audio sources.

	* Internationalization: Add full German translation.

2017-11-30  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 4.5 released.

	* Playback: Resuming after switching between audio sources works now.

	* Playback: Bit rate limitation setting works reliably now.

	* Airable: Reload root listing of external service whose login status
	  have been changed. This change relies on D-Bus API changes as used
	  by listbrokers v3.3.

	* Airable: Fix list context information in XML serialization for old
	  navigation style (coming from the Airable root directory).

	* Deezer: Locked out. It is possible to activate the Deezer source,
	  but it will not work.

	* UI: Avoid funny lines in lists ("Project-Id-Version: ...").

2017-11-23  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 4.4 released.

	* DRCP: Support resume-playback command (0xb4). The current crawler
	  state is encoded as StrBo URL by asking the responsible list broker
	  and then stored on file. On next start, the configuration is read
	  back and used when the resume request is received. Resume data is
	  erased on explicit stop commands sent by the end user.

	* DRCP: Screen IDs are not sent anymore with browse, play, edit, or
	  msg views. There is a new screen ID "error" which uses screen IDs
	  for error reporting purposes.

	  The term "screen ID" will still be used even though the term "error
	  ID" would be more appropriate given the current implementation. This
	  is because it is possible to send screen IDs with non-error views,
	  too. This is also the reason why screen IDs will be global and
	  independent of context they appear in.

	* DRCP: A few errors with proper screen IDs are emitted for testing
	  purposes. They are emitted on problems when entering a directory or
	  jumping to a list context (aka activating an Airable audio source),
	  e.g., if permission is denied or on authentication failure.

	* DRCP: Audio source idle screens are sent as view ID "msg".

	* DRCP: Empty or other status screens are sent as view ID "msg"
	  containing multi-line messages.

	* Roon: Idle screen says, "Roon Ready (beta)".

	* Roon: Only send opaque lines (see d03067e7) to SPI slave as stream
	  meta data if the other tags are unavailable. This reduces the amount
	  of data sent to the SPI slave and causes less confusion.

	* Internationalization: The local language can be configured and
	  queried over D-Bus using the generic configuration interface.
	  Language settings are stored on configuration file so to avoid
	  "language flickering" at startup. Translated on-screen messages are
	  updated at runtime the instant the language settings are changed.

2017-10-16  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 4.3 released.

	* Audio sources: A new view for inactive state has been added. It does
	  not send any screen updates and does not react to any inputs.

	* Roon: Forward non-structured meta data to SPI slave as per
	  certification requirements. This is done in the play view using the
	  new tags "line0", "line1", and "line2". The tags for transmitting
	  structured information remain empty for Roon.

	* Misc: The program activates the view for inactive at startup. In
	  previous versions, the UPnP view was automatically activated (an
	  arbitrary choice made in the past because "just something" had to be
	  activated).

2017-09-26  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 4.2 released.

	* Playback: Lists are requested to remain in cache while playing their
	  contents. To make this work, listbrokers v3.1 or later is required.

	  The problem with non-cacheable lists is that they are destroyed and
	  reloaded once the user re-enters them by navigating back and forth.
	  The directory crawler cannot catch up with these changes, so it
	  stopped working in previous versions and drcpd even crashed in this
	  situation. Since it would have been impractical to extend the
	  crawler, the list brokers have been taught to temporarily override
	  list caching modes.

	* Roon: Forward button presses to Roon (skip, seek, shuffle, repeat)
	  if the Roon source is selected, report Roon state changes to SPI
	  slave via DRCP XML.

2017-09-05  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 4.1 released.

	* Summary: This is a merge of versions 3.9 and 4.0. It includes a
	  first beta integration of our Roon player and explicit audio source
	  handling.

	* Roon: Add view for Roon audio source handling and corresponding idle
	  screen.

	* TA Control: Add view for plain URL audio source handling and
	  corresponding idle screen.

	* Airable: Register multiple audio sources, one for each top-level
	  item in the root directory. The primary Airable audio source is
	  called "airable", meaning all of Airable. Each sub-source is
	  prefixed with string "airable." (as in "airable.tidal"). While an
	  audio sub-source is active, list navigation is restricted to the
	  subtree corresponding to that source (e.g., it is not possible to
	  leave the TIDAL directory while source "airable.tidal" is active).

	* Audio sources: Switching by audio source now also switches the view
	  the audio source belongs to. For Airable sub-sources, the
	  corresponding subtree is entered.

	* Audio sources: Changed naming scheme. We do not use view name for
	  audio source IDs anymore (primarily because the Airable view is
	  associated with multiple audio sources).

	* DRCP: Send dynamic view titles as passed in by list brokers.

	* Airable: Fix minor bug in root list handling which sometimes caused
	  the search forms to stop working.

	* Misc: Show helpful message in case USB device list, UPnP server
	  list, or Airable root list is empty.

2017-09-01  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 3.9 released.

	* Playback: Fix skipping over empty directories while playing a
	  directory structure.

2017-07-19  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 3.8 released.

	* Misc: Adapted to internal interfaces for changes made in list
	  brokers v2.4.

2017-06-08  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 3.7 released.

	* Misc: Better log messages in case of D-Bus method call failures.

	* Misc: Improvements of introspection while debugging locking
	  problems.

2017-06-02  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 3.6 released.

	* Misc: Migration to new D-Bus configuration management code.

	* Misc: Avoid bug warnings.

2017-04-20  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 3.5 released.

	* Playback: Play icon is shown after resuming from pause. Regression
	  was introduced in v3.4.

	* Playback: Attempting to skip before first playable item during
	  playback does not confuse the player anymore.

	* Stability: Fix crash during fast skipping.

2017-04-11  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 3.4 released.

	* Playback: Support fast forward, fast reverse and seeking. Fast
	  winding modes are reported to the SPI slave so that they can be
	  displayed.

	* Playback: The play view is also left now after playing a list whose
	  last file is not playable, or which contains no playable files at
	  all.

	* Playback: Handle list items with no associated URL correctly (by not
	  attempting to play them).

	* Skipping: A few minor fixes for fast sequences of skip requests.

	* Skipping: Fix skipping over text files in both directions.

2017-03-29  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 3.3 released.

	* Skipping: More fixes for fast sequences of skip requests.

	* Stability: Fix occasional hangs and crashes caused by internal
	  communication failures. Requires dcpd v3.2 for full effect as there
	  was also a bug on the other side.

	* Misc: Slightly faster startup.

2017-03-21  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 4.0 released.

	* Audio routing: Register with TAPSwitch as audio source(s).

	* Audio routing: The player selects the audio source before starting
	  to play. It won't play anything before source selection has
	  succeeded.

	* Audio routing: Audio source selection by external means switches to
	  the associated view, if any.

	* Roon: Connect to playback D-Bus interface exported by TARoon and
	  react to now-playing signals. This makes TARoon available as a
	  non-selectable audio source just like the Smartphone App source.

	* Roon: Forward playback commands to TARoon using the same mechanisms
	  as for the StrBo streamplayer. This enables controlling play, pause,
	  and stop for Roon.

	* TA Control/Roon: Player permissions apply. There are only static
	  permissions whereas Roon requires dynamic permissions, but it's a
	  start.

2017-03-06  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 3.2 released.

	* Stability: Fix spurious crash.

2017-02-28  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 3.1 released.

	* Playback: Fixed problem with toggling between play and pause modes.

	* Playback: Fixed skipping backwards over problematic streams.

	* Skipping: Fast sequences of skip requests work reliably and do not
	  kill the directory traversal.

	* Skipping: Rewind threshold has been increased from 2 to 5 seconds.
	  This is because skipping backwards can be slow, especially on UPnP
	  lists, so even if skipping was clearly intended by the user, the
	  skip back command may be processed only after more than 2 seconds
	  into the track. Five seconds still feel natural and practical, so
	  here we go.

	* Stability: Fixed crash due to dangling file item pointer while
	  skipping quickly over long stretches of a list.

2017-02-16  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 3.0 released: Changes of D-Bus interfaces were necessary
	  which break compatibility with older version, hence the change of
	  the major version.

	* Cover art: Integrate with TACAMan. This primarily means taking
	  stream keys from streamplayer and listbrokers, and passing them to
	  streamplayer when queuing a stream. All the heavy lifting is done by
	  TACAMan.

2017-01-19  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 2.9 released.

	* Qobuz: Support gapless playback.

	* Skipping: Jumping back and forth between tracks works reliably, also
	  across directory boundaries.

	* Playback: Bit rate of streams can be restricted. In case there are
	  alternative streams to play for the same track or radio station, the
	  best stream which fits the configured maximum bit rate is selected.

	* Playback: Pictures, text files, and other non-playable audio files
	  are ignored and do not interrupt the currently playing list.

	* Playback: Failing streams are retried a few times in case they stop
	  playing unintendedly.

	* Playback: The number of prefetched of streams depends on context
	  now. In case of Internet radio, no prefetching is done. In case of
	  TIDAL and Qobuz, only a single stream is prefetched. In other cases,
	  up to 5 streams are prefetched.

	* UI: Improved handling of stream meta data. There should be no more
	  empty entries.

	* UI: Fixed various problems that appeared if the user skipped through
	  streams quickly.

	* Configuration: There is a configuration file for drcpd now. It can
	  be read out and manipulated using some new D-Bus interfaces for
	  generic configuration management.

	* Debugging: Add some useful logs at higher verbosity levels.

	* Compatibility: Requires streamplayer 2.0 to work, older versions are
	  not supported.

	* Compatibility: Requires listbrokers 1.29 to work, older versions are
	  not supported.

2016-12-06  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 2.8 released.

	* Playback: Pushing play in the smartphone app to resume a paused
	  stream works again as expected.

2016-11-25  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 2.7 released.

	* Debugging: Allow setting verbosity level over D-Bus.

2016-11-17  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 2.6 released.

	* Misc: Send title and URL to dcpd so that it is always up-to-date
	  with correct and consistent meta data. This worked already in v2.1,
	  but stopped working in v2.2 as a result of major changes applied
	  between the two versions.

2016-11-03  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 2.5 released.

	* User interface: Jump back from play view to browse view after
	  playing the last track of a list.

	* User interface: Avoid meta data display troubles in conjunction with
	  the smartphone app.

	* User interface: Fixed crash when trying to work with an empty list.

	* User interface: Fixed hanging system on startup in case of network
	  problems.

2016-10-24  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 2.4 released.

	* User interface: Selecting a track while another one is playing works
	  again as expected.

	* User interface: Show fallback title for those Internet radios that
	  do not send any meta data.

2016-09-21  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 2.3 released.

	* User interface: Fix showing root list at startup. This version
	  should not end up showing empty root lists anymore after startup
	  when the lists shouldn't be empty.

	* User interface: Fix reloading of lists after loss of network
	  connection.

	* User interface: Busy state updates are more reliable. This avoids
	  endless display of busy symbol.

	* Playback: Skipping backwards through Airable radio and podcast lists
	  works. It didn't work before because we tried to rewind to start
	  before attempting to skip.

	* Stability: Fix several lock-ups and crashes of the user interface.

2016-07-29  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 2.2 released.

	* Playback: The player component has been completely redesigned. It is
	  follows an MVC-like architecture now. This version, however, is a
	  poorly tested one. Any kind of problems may still occur in this
	  version.

	* Stability: Fix rare race-condition in asynchronous list handling
	  code.

2016-07-21  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 2.1 released.

	* User interface: Meta data updates are functional again.

	* Stability: Avoid crash on various occasions.

	* Airable: Logout fixed.

	* Misc: Remove many now unneeded log messages to reduce overall CPU
	  consumption.

2016-07-12  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 2.0 released.

	* Groundwork: Many D-Bus methods are invoked asynchronously now,
	  leading to vast improvement on perceived system response. Due to
	  project time constraints, not all parts have been reworked yet and
	  remain synchronous, but the foundation for moving more code from
	  synchronous to asynchronous messaging has been set.

	  A lot of code had to be touched to get this done, so this version
	  may actually be less stable than previous versions.

	* D-Bus: Method and signal handlers are decoupled from the D-Bus
	  context by an event queue. The intended effects of the D-Bus
	  handlers, especially those parts that can block or are
	  time-consuming, are processed in a different context so that D-Bus
	  communication is never blocked for long or unpredictable times.

	* Misc: Better tracking of busy state.

	* Misc: Avoid some memory leaks.

2016-05-19  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.21 released.

	* Airable: Log out using new D-Bus method for logging out from
	  external services, react on login/logout communicated via new D-Bus
	  signals.

2016-05-04  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.20 released.

	* Airable: Handle logout buttons in Airable.

	* DCP: Increase dcpd timeout to avoid lost messages between dcpd and
	  drcpd in really busy situations.

	* Misc: Adapt to latest changes in Streamplayer D-Bus interfaces.
	  Requires streamplayer 1.8 because of incompatible changes.

2016-04-25  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.19 released.

	* Playback: Continuing a paused stream does not lose the stream
	  information anymore.

2016-04-21  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.18 released.

	* User interface: Searching in lists outside of Airable domain is
	  possible. As long as the lists are sorted, hitting the search button
	  in UPnP or USB view opens a search dialog. The entered string is
	  searched within the currently displayed list, and the selection
	  moves to the entry whose prefix matches best.

	* User interface: Search button within Airable directory jumps
	  directly to the search form of the currently browsed domain.

	* User interface: Moving quickly through long lists by holding the up
	  or down key is actually useful now. It was way too slow in previous
	  versions.

	* User interface: Lists wrap around, jumping to the end of a list is
	  easy and fast now.

	* Stability: Avoid hanging process in various occasions. Some more
	  deadlocks fixed.

2016-04-14  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.17 released.

	* User interface: Broken TIDAL lists are being worked around. The
	  lists do not disappear anymore, but instead the extra empty lines
	  sent by TIDAL are displayed as unplayable "----" lines.

	* User interface: Search box can be reopened as expected after it has
	  been closed due to timeout or stop command.

	* Stability: Avoid hanging process in various occasions. There were
	  several deadlocks in the audio player module.

	* DRCP: Send proper context ID with search forms.

2016-04-08  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.16 released.

	* Playback: Use stream meta data preloaded from external sources where
	  suspected to be available. Currently, this includes the TIDAL and
	  Deezer sections of the Airable directory.

	* Playback: Various other fixes concerning display of stream meta
	  data.

	* TA Control: Catch stream meta data for externally started streams
	  and use them to generate DRC screen updates. Such streams usually
	  originate from the smartphone app.

2016-03-30  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.15 released.

	* User interface: Fix management of busy state indicator.

2016-03-22  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.14 released.

	* User interface: Avoid jumping back to root menu in various
	  situations, especially after having left the device alone for a
	  while.

	* DRCP: Fix screen ID of play view.

	* Stability: Avoid hanging process at shutdown time. Fixes long system
	  shutdown time and system update process.

2016-03-15  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.13 released.

	* Playback: All streams from Airable are played in linear list mode,
	  not single track mode.

	* Playback: Fix long and blocking "Buffering..." messages. This
	  happened for slow sources and may have blocked the display for
	  seconds or even minutes even though a stream was already playing.

	* Playback: Fix start playing of new stream while another stream is
	  playing.

	* Playback: Fix stop playing of streams (meta data are cleared).

2016-03-07  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.12 released.

	* DRC protocol: XML objects sent to the controlling peer are queued
	  when necessary. This means that display updates that previously got
	  lost are sent reliably one after the other now.

2016-03-03  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.11 released.

	* User interface: Support for Airable search forms. This involves
	  requesting and receiving search queries from the user when the user
	  tries to enter a search form.

	  In addition, a mechanism for preloaded queries is implemented as
	  well so that the SPI slave may actively push new queries to us.

	* DRCP: Extended list item types for the viewing pleasure.

2016-02-25  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.10 released.

	* User interface: Avoid screen full of dashes on list failures.

	* User interface: UPnP servers, USB devices, and search forms are not
	  shown as plain directories anymore.

2016-02-12  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.9 released.

	* Bug fix: Avoid log disruption by very long messages.

2016-02-10  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.8 released.

	* Playback: Make skipping back and forth streams through list
	  hierarchies more intuitive.

	  Requires streamplayer 1.5 because of D-Bus interface changes.

	* Playback: Fix skipping in playing of large directory hierarchies.

	* User interface: Show stream bit rate in more cases.

	* Misc: Fixed a few bugs in user interface.

2016-01-29  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.7 released.

	* Streaming: Improve interoperability with streams started from other
	  programs (such as dcpd when fulfilling smartphone app requests to
	  play certain streams).

	* Streaming: Inform SPI slave about currently playing stream title and
	  URL. Necessary for smartphone app support.

2016-01-12  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.6 released.

	* User interface: Indicate busy state and show "buffering" message
	  while waiting for Streamplayer to send its start notification.

	* User interface: Update German translation.

	* DRC protocol: Fixed XML output for play view updates.

	* DRC protocol: Send display updates every time a view is activated by
	  slave, even if the view is already active.

2015-12-15  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.5 released.

	* Playback: Skipping back and forth streams through list hierarchies
	  works.

	  Requires streamplayer 1.4 because of D-Bus interface changes.

	* List views: Refresh lists when they change. In particular, the UPnP
	  server list gets refreshed when servers are discovered or lost,
	  TuneIn lists and UPnP lists get refreshed when network connectivity
	  changes, and the USB device list gets refreshed when plugging
	  devices.

	* DRC protocol: Generate more compact XML data for speed.

	* Misc: Lots of internal changes with regard to playback handling.

2015-11-16  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.4 released.

	* Browsing: Send alternative stream title to SPI slave. The
	  alternative title is sent in the alttrack tag and is limited to a
	  length of 20 UTF-8 characters.

	  The alternative title is made from the name as it appeared in the
	  list the user selected the stream from. In the very unlikely case
	  that this string was also empty, the plain URL is used instead.

	* Playback: Fix queuing into Streamplayer in linear playback mode.

2015-11-03  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.3 released.

	* TuneIn view: Default playback mode in single track mode, not linear
	  scan with directory traversals.

	* Playback: Pressing OK or Play on a stream immediately plays that
	  stream. Pressing Stop beforehand is not required anymore.

	  Requires streamplayer 1.3 because of D-Bus interface changes.

	* Playback: Playing a directory is not allowed in single track mode.

	* Playback: Fix playback of most streams from a list.

2015-08-25  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.2 released.

	* Requires listbrokers 1.2 because of D-Bus interface changes.

	* Improve error handling: Network failures are handled in a much
	  better way, without freezes or dead displays.

2015-07-13  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.1 released.

	* Show version information in log, add --version option.

	* Fix crash while browsing UPnP directories.

2015-06-29  Robert Tiemann  <r.tiemann@ta-hifi.de>

	* Version 1.0 released.

	* First release for testing.


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