Queue repeat modes (#126)

This replaces the previous system of a separate track and queue repeat, with a RepeatMode type with the following options and behaviours:

- OFF: No repeat, queue or track. When the current queue finishes, shuffled or otherwise, playback will stop.
- REPEAT_TRACK: The current track will loop indefinitely, unless next is explicitly called through some user action (ie using the next button in the now playing screen)
- REPEAT_QUEUE: The entire queue will repeat indefinitely. When shuffled is enabled this will repeat the queue with new combinations each cycle.

The repeat mode is persisted in non-volatile storage, so the behaviour will be consistent throughout restarts and queue replacements, and so the "queue repeat by default" use case can be met in this way.

In addition, I've made it work a little nicer when the queue runs out in the now playing screen, keeping the previously played track shown and playback can be continued by using the play button or by going to a previous song in the queue.

Reviewed-on: https://codeberg.org/cool-tech-zone/tangara-fw/pulls/126
Co-authored-by: ailurux <ailuruxx@gmail.com>
Co-committed-by: ailurux <ailuruxx@gmail.com>

lua/images.lua

@@ -13,8 +13,9 @@ local img = {
   prev = lvgl.ImgData("//lua/img/prev.png"),
   shuffle = lvgl.ImgData("//lua/img/shuffle.png"),
   shuffle_off = lvgl.ImgData("//lua/img/shuffle_off.png"),
-  repeat_src = lvgl.ImgData("//lua/img/repeat.png"), -- repeat is a reserved word
+  repeat_track = lvgl.ImgData("//lua/img/repeat.png"),
   repeat_off = lvgl.ImgData("//lua/img/repeat_off.png"),
+  repeat_queue = lvgl.ImgData("//lua/img/repeat_queue.png"),
   queue = lvgl.ImgData("//lua/img/queue.png"),
   files = lvgl.ImgData("//lua/img/files.png"),
   settings = lvgl.ImgData("//lua/img/settings.png"),

lua/playing.lua

@@ -176,9 +176,9 @@ return screen:new {
 
     local repeat_btn = controls:Button {}
     repeat_btn:onClicked(function()
-      queue.repeat_track:set(not queue.repeat_track:get())
+      queue.repeat_mode:set((queue.repeat_mode:get() + 1) % 3)
     end)
-    local repeat_img = repeat_btn:Image { src = img.repeat_src }
+    local repeat_img = repeat_btn:Image { src = img.repeat_off }
     theme.set_subject(repeat_btn, icon_enabled_class)
     local repeat_desc = widgets.Description(repeat_btn)
 
@@ -197,6 +197,10 @@ return screen:new {
 
     local play_pause_btn = controls:Button {}
     play_pause_btn:onClicked(function()
+      if (not playback.track:get()) then
+        -- Restart the last played track
+        queue.position:set(queue.position:get())
+      end
       playback.playing:set(not playback.playing:get())
     end)
     play_pause_btn:focus()
@@ -238,7 +242,10 @@ return screen:new {
             text = format_time(pos)
           }
           local track = playback.track:get()
-          if not track then return end
+          if not track then 
+            scrubber:set{value = 0}
+            return
+          end
           if not track.duration then return end
           scrubber:set { value = pos / track.duration * 100 }
         end
@@ -247,13 +254,7 @@ return screen:new {
         if not track then
           if queue.loading:get() then
             title:set { text = "Loading..." }
-          else
-            title:set { text = "" }
           end
-          artist:set { text = "" }
-          cur_time:set { text = format_time(0) }
-          end_time:set { text = format_time(0) }
-          scrubber:set { value = 0 }
           return
         end
         if track.duration then
@@ -268,7 +269,7 @@ return screen:new {
         if not pos then return end
         playlist_pos:set { text = tostring(pos) }
 
-        local can_next = pos < queue.size:get() or queue.random:get()
+        local can_next = pos < queue.size:get() or queue.random:get() or queue.repeat_mode:get() == queue.RepeatMode.REPEAT_QUEUE
         theme.set_subject(
           next_btn, can_next and icon_enabled_class or icon_disabled_class
         )
@@ -283,14 +284,16 @@ return screen:new {
           shuffle_desc:set { text = "Enable shuffle" }
         end
       end),
-      queue.repeat_track:bind(function(en)
+      queue.repeat_mode:bind(function(mode)
-        theme.set_subject(repeat_btn, en and icon_enabled_class or icon_disabled_class)
+        if mode == queue.RepeatMode.OFF then
-        if en then
-          repeat_img:set_src(img.repeat_src)
-          repeat_desc:set { text = "Disable track repeat" }
-        else
           repeat_img:set_src(img.repeat_off)
-          repeat_desc:set { text = "Enable track repeat" }
+          repeat_desc:set { text = "Repeat off" }
+        elseif mode == queue.RepeatMode.REPEAT_TRACK then
+          repeat_img:set_src(img.repeat_track)
+          repeat_desc:set { text = "Repeat track" }
+        elseif mode == queue.RepeatMode.REPEAT_QUEUE then
+          repeat_img:set_src(img.repeat_queue)
+          repeat_desc:set { text = "Repeat queue" }
         end
       end),
       queue.size:bind(function(num)

luals-stubs/queue.lua

@@ -8,8 +8,7 @@
 --- @class queue
 --- @field position Property The index in the queue of the currently playing track. This may be zero if the queue is empty. Writeable.
 --- @field size Property The total number of tracks in the queue, including tracks which have already been played.
---- @field replay Property Whether or not the queue will be restarted after the final track is played. Writeable.
+--- @field repeat_mode Property The current repeat mode for the queue. Writeable.
---- @field repeat_track Property Whether or not the current track will repeat indefinitely. Writeable.
 --- @field random Property Determines whether, when progressing to the next track in the queue, the next track will be chosen randomly. The random selection algorithm used is a Miller Shuffle, which guarantees that no repeat selections will be made until every item in the queue has been played. Writeable.
 local queue = {}
 

src/drivers/include/drivers/nvs.hpp

@@ -138,6 +138,9 @@ class NvsStorage {
   auto PrimaryInput() -> InputModes;
   auto PrimaryInput(InputModes) -> void;
 
+  auto QueueRepeatMode() -> uint8_t;
+  auto QueueRepeatMode(uint8_t) -> void;
+
   auto DbAutoIndex() -> bool;
   auto DbAutoIndex(bool) -> void;
 
@@ -173,6 +176,8 @@ class NvsStorage {
 
   Setting<uint8_t> db_auto_index_;
 
+  Setting<uint8_t> queue_repeat_mode_;
+
   util::LruCache<10, bluetooth::mac_addr_t, uint8_t> bt_volumes_;
   bool bt_volumes_dirty_;
 

src/drivers/nvs.cpp

@@ -41,6 +41,7 @@ static constexpr char kKeyDisplayRows[] = "disprows";
 static constexpr char kKeyHapticMotorType[] = "hapticmtype";
 static constexpr char kKeyLraCalibration[] = "lra_cali";
 static constexpr char kKeyDbAutoIndex[] = "dbautoindex";
+static constexpr char kKeyQueueRepeatMode[] = "queue_rpt";
 static constexpr char kKeyFastCharge[] = "fastchg";
 
 static auto nvs_get_string(nvs_handle_t nvs, const char* key)
@@ -278,6 +279,7 @@ NvsStorage::NvsStorage(nvs_handle_t handle)
       bt_preferred_(kKeyBluetoothPreferred),
       bt_names_(kKeyBluetoothNames),
       db_auto_index_(kKeyDbAutoIndex),
+      queue_repeat_mode_(kKeyQueueRepeatMode),
       bt_volumes_(),
       bt_volumes_dirty_(false) {}
 
@@ -304,6 +306,7 @@ auto NvsStorage::Read() -> void {
   bt_preferred_.read(handle_);
   bt_names_.read(handle_);
   db_auto_index_.read(handle_);
+  queue_repeat_mode_.read(handle_);
   readBtVolumes();
 }
 
@@ -325,6 +328,7 @@ auto NvsStorage::Write() -> bool {
   bt_preferred_.write(handle_);
   bt_names_.write(handle_);
   db_auto_index_.write(handle_);
+  queue_repeat_mode_.write(handle_);
   writeBtVolumes();
   return nvs_commit(handle_) == ESP_OK;
 }
@@ -566,6 +570,16 @@ auto NvsStorage::PrimaryInput(InputModes mode) -> void {
   input_mode_.set(static_cast<uint8_t>(mode));
 }
 
+auto NvsStorage::QueueRepeatMode() -> uint8_t {
+  std::lock_guard<std::mutex> lock{mutex_};
+  return queue_repeat_mode_.get().value_or(0);
+}
+
+auto NvsStorage::QueueRepeatMode(uint8_t mode) -> void {
+  std::lock_guard<std::mutex> lock{mutex_};
+  queue_repeat_mode_.set(mode);
+}
+
 auto NvsStorage::DbAutoIndex() -> bool {
   std::lock_guard<std::mutex> lock{mutex_};
   return db_auto_index_.get().value_or(true);

src/tangara/audio/track_queue.cpp

@@ -38,25 +38,26 @@ namespace audio {
 using Reason = QueueUpdate::Reason;
 
 RandomIterator::RandomIterator()
-    : seed_(0), pos_(0), size_(0), replay_(false) {}
+    : seed_(0), pos_(0), size_(0) {}
 
 RandomIterator::RandomIterator(size_t size)
-    : seed_(), pos_(0), size_(size), replay_(false) {
+    : seed_(), pos_(0), size_(size) {
   esp_fill_random(&seed_, sizeof(seed_));
 }
 
 auto RandomIterator::current() const -> size_t {
-  if (pos_ < size_ || replay_) {
+  return MillerShuffle(pos_, seed_, size_);
-    return MillerShuffle(pos_, seed_, size_);
-  }
-  return size_;
 }
 
-auto RandomIterator::next() -> void {
+auto RandomIterator::next(bool repeat) -> bool {
   // MillerShuffle behaves well with pos > size, returning different
   // permutations each 'cycle'. We therefore don't need to worry about wrapping
   // this value.
-  pos_++;
+  if (pos_ < size_ - 1 || repeat) {
+    pos_++;
+    return true;
+  }
+  return false;
 }
 
 auto RandomIterator::prev() -> void {
@@ -72,10 +73,6 @@ auto RandomIterator::resize(size_t s) -> void {
   pos_ = 0;
 }
 
-auto RandomIterator::replay(bool r) -> void {
-  replay_ = r;
-}
-
 auto notifyChanged(bool current_changed, Reason reason) -> void {
   QueueUpdate ev{
       .current_changed = current_changed,
@@ -95,15 +92,15 @@ auto notifyPlayFrom(uint32_t start_from_position) -> void {
   events::Audio().Dispatch(ev);
 }
 
-TrackQueue::TrackQueue(tasks::WorkerPool& bg_worker, database::Handle db)
+TrackQueue::TrackQueue(tasks::WorkerPool& bg_worker, database::Handle db, drivers::NvsStorage& nvs)
     : mutex_(),
       bg_worker_(bg_worker),
       db_(db),
+      nvs_(nvs),
       playlist_(".queue.playlist"),
       position_(0),
       shuffle_(),
-      repeat_(false),
+      repeatMode_(static_cast<RepeatMode>(nvs.QueueRepeatMode())) {}
-      replay_(false) {}
 
 auto TrackQueue::current() const -> TrackItem {
   const std::shared_lock<std::shared_mutex> lock(mutex_);
@@ -293,26 +290,25 @@ auto TrackQueue::goTo(size_t position) -> void {
 }
 
 auto TrackQueue::next(Reason r) -> void {
-  bool changed = true;
+  bool changed = false;
 
   {
     const std::unique_lock<std::shared_mutex> lock(mutex_);
-    auto pos = position_;
 
     if (shuffle_) {
-      shuffle_->next();
+      changed = shuffle_->next(repeatMode_ == RepeatMode::REPEAT_QUEUE);
       position_ = shuffle_->current();
     } else {
       if (position_ + 1 < totalSize()) {
         position_++;  // Next track
-      }
+        changed = true;
-      else {
+      } else if (repeatMode_ == RepeatMode::REPEAT_QUEUE) {
         position_ = 0; // Go to beginning
+        changed = true;
       }
     }
 
     goTo(position_);
-    changed = pos != position_;
   }
 
   notifyChanged(changed, r);
@@ -329,9 +325,8 @@ auto TrackQueue::previous() -> void {
     } else {
       if (position_ > 0) {
         position_--;
-      }
+      } else if (repeatMode_ == RepeatMode::REPEAT_QUEUE) {
-      else {
+        position_ = totalSize()-1; // Go to the end of the queue
-        position_ = totalSize();
       }
     }
     goTo(position_);
@@ -341,7 +336,7 @@ auto TrackQueue::previous() -> void {
 }
 
 auto TrackQueue::finish() -> void {
-  if (repeat_) {
+  if (repeatMode_ == RepeatMode::REPEAT_TRACK) {
     notifyChanged(true, Reason::kRepeatingLastTrack);
   } else {
     next(Reason::kTrackFinished);
@@ -367,7 +362,6 @@ auto TrackQueue::random(bool en) -> void {
     const std::unique_lock<std::shared_mutex> lock(mutex_);
     if (en) {
       shuffle_.emplace(totalSize());
-      shuffle_->replay(replay_);
     } else {
       shuffle_.reset();
     }
@@ -382,34 +376,14 @@ auto TrackQueue::random() const -> bool {
   return shuffle_.has_value();
 }
 
-auto TrackQueue::repeat(bool en) -> void {
+auto TrackQueue::repeatMode(RepeatMode mode) -> void {
-  {
+  repeatMode_ = mode;
-    const std::unique_lock<std::shared_mutex> lock(mutex_);
+  nvs_.QueueRepeatMode(repeatMode_);
-    repeat_ = en;
-  }
-
   notifyChanged(false, Reason::kExplicitUpdate);
 }
 
-auto TrackQueue::repeat() const -> bool {
+auto TrackQueue::repeatMode() const -> RepeatMode {
-  const std::shared_lock<std::shared_mutex> lock(mutex_);
+  return repeatMode_;
-  return repeat_;
-}
-
-auto TrackQueue::replay(bool en) -> void {
-  {
-    const std::unique_lock<std::shared_mutex> lock(mutex_);
-    replay_ = en;
-    if (shuffle_) {
-      shuffle_->replay(en);
-    }
-  }
-  notifyChanged(false, Reason::kExplicitUpdate);
-}
-
-auto TrackQueue::replay() const -> bool {
-  const std::shared_lock<std::shared_mutex> lock(mutex_);
-  return replay_;
 }
 
 auto TrackQueue::serialise() -> std::string {
@@ -417,9 +391,8 @@ auto TrackQueue::serialise() -> std::string {
   cppbor::Map encoded;
 
   cppbor::Array metadata{
-      cppbor::Bool{repeat_},
-      cppbor::Bool{replay_},
       cppbor::Uint{position_},
+      cppbor::Uint{repeatMode_},
   };
 
   if (opened_playlist_) {
@@ -471,26 +444,24 @@ cppbor::ParseClient* TrackQueue::QueueParseClient::item(
       i_ = 0;
     } else if (item->type() == cppbor::UINT) {
       auto val = item->asUint()->unsignedValue();
-      // Save the position so we can apply it later when we have finished
+      if (i_ == 0) {
-      // serialising
+        // First value == position
-      position_to_set_ = val;
+        // Save the position so we can apply it later when we have finished
+        // serialising
+        position_to_set_ = val;
+      } else if (i_ == 1) {
+        // Second value == repeat mode
+        queue_.repeatMode_ = static_cast<RepeatMode>(val);
+      }
+      i_++;
     } else if (item->type() == cppbor::TSTR) {
       auto val = item->asTstr();
       queue_.openPlaylist(val->value(), false);
-    } else if (item->type() == cppbor::SIMPLE) {
-      bool val = item->asBool()->value();
-      if (i_ == 0) {
-        queue_.repeat_ = val;
-      } else if (i_ == 1) {
-        queue_.replay_ = val;
-      }
-      i_++;
     }
   } else if (state_ == State::kShuffle) {
     if (item->type() == cppbor::ARRAY) {
       i_ = 0;
       queue_.shuffle_.emplace();
-      queue_.shuffle_->replay(queue_.replay_);
     } else if (item->type() == cppbor::UINT) {
       auto val = item->asUint()->unsignedValue();
       switch (i_) {

src/tangara/audio/track_queue.hpp

@@ -32,12 +32,11 @@ class RandomIterator {
 
   auto current() const -> size_t;
 
-  auto next() -> void;
+  auto next(bool repeat) -> bool;
   auto prev() -> void;
 
   // Note resizing has the side-effect of restarting iteration.
   auto resize(size_t) -> void;
-  auto replay(bool) -> void;
 
   auto seed() -> size_t& { return seed_; }
   auto pos() -> size_t& { return pos_; }
@@ -47,7 +46,6 @@ class RandomIterator {
   size_t seed_;
   size_t pos_;
   size_t size_;
-  bool replay_;
 };
 
 /*
@@ -65,7 +63,7 @@ class RandomIterator {
  */
 class TrackQueue {
  public:
-  TrackQueue(tasks::WorkerPool& bg_worker, database::Handle db);
+  TrackQueue(tasks::WorkerPool& bg_worker, database::Handle db, drivers::NvsStorage& nvs);
 
   /* Returns the currently playing track. */
   using TrackItem =
@@ -107,11 +105,14 @@ class TrackQueue {
   auto random(bool) -> void;
   auto random() const -> bool;
 
-  auto repeat(bool) -> void;
+  enum RepeatMode {
-  auto repeat() const -> bool;
+    OFF = 0,
+    REPEAT_TRACK = 1,
+    REPEAT_QUEUE = 2,
+  };
 
-  auto replay(bool) -> void;
+  auto repeatMode(RepeatMode mode) -> void;
-  auto replay() const -> bool;
+  auto repeatMode() const -> RepeatMode;
 
   auto serialise() -> std::string;
   auto deserialise(const std::string&) -> void;
@@ -129,6 +130,7 @@ class TrackQueue {
 
   tasks::WorkerPool& bg_worker_;
   database::Handle db_;
+  drivers::NvsStorage& nvs_;
 
   MutablePlaylist playlist_;
   std::optional<Playlist> opened_playlist_;
@@ -136,8 +138,7 @@ class TrackQueue {
   size_t position_;
 
   std::optional<RandomIterator> shuffle_;
-  bool repeat_;
+  RepeatMode repeatMode_;
-  bool replay_;
 
   class QueueParseClient : public cppbor::ParseClient {
    public:

src/tangara/lua/lua_queue.cpp

@@ -101,6 +101,24 @@ static const struct luaL_Reg kQueueFuncs[] = {
 
 static auto lua_queue(lua_State* state) -> int {
   luaL_newlib(state, kQueueFuncs);
+
+  // Repeat Mode Enum
+  lua_pushliteral(state, "RepeatMode");
+  lua_newtable(state);
+
+  lua_pushliteral(state, "OFF");
+  lua_pushinteger(state, (int)audio::TrackQueue::RepeatMode::OFF);
+  lua_rawset(state, -3);
+
+  lua_pushliteral(state, "REPEAT_TRACK");
+  lua_pushinteger(state, (int)audio::TrackQueue::RepeatMode::REPEAT_TRACK);
+  lua_rawset(state, -3);
+
+  lua_pushliteral(state, "REPEAT_QUEUE");
+  lua_pushinteger(state, (int)audio::TrackQueue::RepeatMode::REPEAT_QUEUE);
+  lua_rawset(state, -3);
+
+  lua_rawset(state, -3);
   return 1;
 }
 

src/tangara/system_fsm/booting.cpp

@@ -97,7 +97,7 @@ auto Booting::entry() -> void {
       sServices->samd(), std::unique_ptr<drivers::AdcBattery>(adc)));
 
   sServices->track_queue(std::make_unique<audio::TrackQueue>(
-      sServices->bg_worker(), sServices->database()));
+      sServices->bg_worker(), sServices->database(), sServices->nvs()));
   sServices->tag_parser(std::make_unique<database::TagParserImpl>());
   sServices->collator(locale::CreateCollator());
   sServices->tts(std::make_unique<tts::Provider>());

src/tangara/ui/ui_fsm.cpp

@@ -210,20 +210,15 @@ lua::Property UiState::sQueuePosition{0, [](const lua::LuaValue& val){
                                       return sServices->track_queue().currentPosition(new_val-1);
                                     }};
 lua::Property UiState::sQueueSize{0};
-lua::Property UiState::sQueueRepeat{false, [](const lua::LuaValue& val) {
+lua::Property UiState::sQueueRepeatMode{0, [](const lua::LuaValue& val) {
-                                      if (!std::holds_alternative<bool>(val)) {
+                                      if (!std::holds_alternative<int>(val)) {
                                         return false;
                                       }
-                                      bool new_val = std::get<bool>(val);
+                                      int new_val = std::get<int>(val);
-                                      sServices->track_queue().repeat(new_val);
+                                      if (new_val < 0 || new_val >= 3) {
-                                      return true;
-                                    }};
-lua::Property UiState::sQueueReplay{false, [](const lua::LuaValue& val) {
-                                      if (!std::holds_alternative<bool>(val)) {
                                         return false;
                                       }
-                                      bool new_val = std::get<bool>(val);
+                                      sServices->track_queue().repeatMode(static_cast<audio::TrackQueue::RepeatMode>(new_val));
-                                      sServices->track_queue().replay(new_val);
                                       return true;
                                     }};
 lua::Property UiState::sQueueRandom{false, [](const lua::LuaValue& val) {
@@ -450,8 +445,7 @@ void UiState::react(const audio::QueueUpdate& update) {
   }
   sQueuePosition.setDirect(current_pos);
   sQueueRandom.setDirect(queue.random());
-  sQueueRepeat.setDirect(queue.repeat());
+  sQueueRepeatMode.setDirect(queue.repeatMode());
-  sQueueReplay.setDirect(queue.replay());
 
   if (update.reason == audio::QueueUpdate::Reason::kBulkLoadingUpdate) {
     sQueueLoading.setDirect(true);
@@ -654,8 +648,7 @@ void Lua::entry() {
             {"previous", [&](lua_State* s) { return QueuePrevious(s); }},
             {"position", &sQueuePosition},
             {"size", &sQueueSize},
-            {"replay", &sQueueReplay},
+            {"repeat_mode", &sQueueRepeatMode},
-            {"repeat_track", &sQueueRepeat},
             {"random", &sQueueRandom},
             {"loading", &sQueueLoading},
         });
@@ -850,23 +843,15 @@ auto Lua::SetRandom(const lua::LuaValue& val) -> bool {
   return true;
 }
 
-auto Lua::SetRepeat(const lua::LuaValue& val) -> bool {
+auto Lua::SetRepeatMode(const lua::LuaValue& val) -> bool {
-  if (!std::holds_alternative<bool>(val)) {
+  if (!std::holds_alternative<int>(val)) {
     return false;
   }
-  bool b = std::get<bool>(val);
+  int mode = std::get<int>(val);
-  sServices->track_queue().repeat(b);
+  sServices->track_queue().repeatMode(static_cast<audio::TrackQueue::RepeatMode>(mode));
   return true;
 }
 
-auto Lua::SetReplay(const lua::LuaValue& val) -> bool {
-  if (!std::holds_alternative<bool>(val)) {
-    return false;
-  }
-  bool b = std::get<bool>(val);
-  sServices->track_queue().replay(b);
-  return true;
-}
 
 void Lua::exit() {
   lv_group_set_default(NULL);

src/tangara/ui/ui_fsm.hpp

@@ -119,8 +119,7 @@ class UiState : public tinyfsm::Fsm<UiState> {
 
   static lua::Property sQueuePosition;
   static lua::Property sQueueSize;
-  static lua::Property sQueueReplay;
+  static lua::Property sQueueRepeatMode;
-  static lua::Property sQueueRepeat;
   static lua::Property sQueueRandom;
   static lua::Property sQueueLoading;
 
@@ -177,8 +176,7 @@ class Lua : public UiState {
 
   auto SetPlaying(const lua::LuaValue&) -> bool;
   auto SetRandom(const lua::LuaValue&) -> bool;
-  auto SetRepeat(const lua::LuaValue&) -> bool;
+  auto SetRepeatMode(const lua::LuaValue&) -> bool;
-  auto SetReplay(const lua::LuaValue&) -> bool;
 
   auto QueueNext(lua_State*) -> int;
   auto QueuePrevious(lua_State*) -> int;