Update track progress in MusicService. Fix #127

src/components/ble/MusicService.cpp

@@ -152,12 +152,20 @@ int Pinetime::Controllers::MusicService::OnCommand(uint16_t conn_handle, uint16_
       albumName = s;
     } else if (ble_uuid_cmp(ctxt->chr->uuid, &msStatusCharUuid.u) == 0) {
       playing = s[0];
+      // These variables need to be updated, because the progress may not be updated immediately,
+      // leading to getProgress() returning an incorrect position.
+      if (playing) {
+        trackProgressUpdateTime = xTaskGetTickCount();
+      } else {
+        trackProgress += static_cast<int>((static_cast<float>(xTaskGetTickCount() - trackProgressUpdateTime) / 1024.0f) * getPlaybackSpeed());
+      }
     } else if (ble_uuid_cmp(ctxt->chr->uuid, &msRepeatCharUuid.u) == 0) {
       repeat = s[0];
     } else if (ble_uuid_cmp(ctxt->chr->uuid, &msShuffleCharUuid.u) == 0) {
       shuffle = s[0];
     } else if (ble_uuid_cmp(ctxt->chr->uuid, &msPositionCharUuid.u) == 0) {
       trackProgress = (s[0] << 24) | (s[1] << 16) | (s[2] << 8) | s[3];
+      trackProgressUpdateTime = xTaskGetTickCount();
     } else if (ble_uuid_cmp(ctxt->chr->uuid, &msTotalLengthCharUuid.u) == 0) {
       trackLength = (s[0] << 24) | (s[1] << 16) | (s[2] << 8) | s[3];
     } else if (ble_uuid_cmp(ctxt->chr->uuid, &msTrackNumberCharUuid.u) == 0) {
@@ -191,7 +199,10 @@ float Pinetime::Controllers::MusicService::getPlaybackSpeed() const {
   return playbackSpeed;
 }
 
-int Pinetime::Controllers::MusicService::getProgress() const {
+int Pinetime::Controllers::MusicService::getProgress() {
+  if (isPlaying()) {
+    return trackProgress + static_cast<int>((static_cast<float>(xTaskGetTickCount() - trackProgressUpdateTime) / 1024.0f) * getPlaybackSpeed());
+  }
   return trackProgress;
 }
 

src/components/ble/MusicService.h

@@ -47,7 +47,7 @@ namespace Pinetime {
 
       std::string getAlbum() const;
 
-      int getProgress() const;
+      int getProgress();
 
       int getTrackLength() const;
 
@@ -81,6 +81,7 @@ namespace Pinetime {
       int trackLength {0};
       int trackNumber {};
       int tracksTotal {};
+      TickType_t trackProgressUpdateTime {0};
 
       float playbackSpeed {1.0f};
 

src/displayapp/screens/Music.cpp

@@ -152,32 +152,27 @@ Music::~Music() {
 void Music::Refresh() {
   if (artist != musicService.getArtist()) {
     artist = musicService.getArtist();
-    currentLength = 0;
+    currentPosition = 0;
     lv_label_set_text(txtArtist, artist.data());
   }
 
   if (track != musicService.getTrack()) {
     track = musicService.getTrack();
-    currentLength = 0;
+    currentPosition = 0;
     lv_label_set_text(txtTrack, track.data());
   }
 
   if (album != musicService.getAlbum()) {
     album = musicService.getAlbum();
-    currentLength = 0;
+    currentPosition = 0;
   }
 
   if (playing != musicService.isPlaying()) {
     playing = musicService.isPlaying();
   }
 
-  // Because we increment this ourselves,
-  // we can't compare with the old data directly
-  // have to update it when there's actually new data
-  // just to avoid unnecessary draws that make UI choppy
-  if (lastLength != musicService.getProgress()) {
-    currentLength = musicService.getProgress();
-    lastLength = currentLength;
+  if (currentPosition != musicService.getProgress()) {
+    currentPosition = musicService.getProgress();
     UpdateLength();
   }
 
@@ -186,7 +181,7 @@ void Music::Refresh() {
     UpdateLength();
   }
 
-  if (playing == Pinetime::Controllers::MusicService::MusicStatus::Playing) {
+  if (playing) {
     lv_label_set_text_static(txtPlayPause, Symbols::pause);
     if (xTaskGetTickCount() - 1024 >= lastIncrement) {
 
@@ -197,18 +192,12 @@ void Music::Refresh() {
       }
       frameB = !frameB;
 
-      if (currentLength < totalLength) {
-        currentLength +=
-          static_cast<int>((static_cast<float>(xTaskGetTickCount() - lastIncrement) / 1024.0f) * musicService.getPlaybackSpeed());
-      } else {
+      if (currentPosition >= totalLength) {
         // Let's assume the getTrack finished, paused when the timer ends
         //  and there's no new getTrack being sent to us
-        // TODO: ideally this would be configurable
         playing = false;
       }
       lastIncrement = xTaskGetTickCount();
-
-      UpdateLength();
     }
   } else {
     lv_label_set_text_static(txtPlayPause, Symbols::play);
@@ -221,15 +210,15 @@ void Music::UpdateLength() {
   } else if (totalLength > (99 * 60)) {
     lv_label_set_text_fmt(txtTrackDuration,
                           "%02d:%02d/%02d:%02d",
-                          (currentLength / (60 * 60)) % 100,
-                          ((currentLength % (60 * 60)) / 60) % 100,
+                          (currentPosition / (60 * 60)) % 100,
+                          ((currentPosition % (60 * 60)) / 60) % 100,
                           (totalLength / (60 * 60)) % 100,
                           ((totalLength % (60 * 60)) / 60) % 100);
   } else {
     lv_label_set_text_fmt(txtTrackDuration,
                           "%02d:%02d/%02d:%02d",
-                          (currentLength / 60) % 100,
-                          (currentLength % 60) % 100,
+                          (currentPosition / 60) % 100,
+                          (currentPosition % 60) % 100,
                           (totalLength / 60) % 100,
                           (totalLength % 60) % 100);
   }

src/displayapp/screens/Music.h

@@ -70,10 +70,8 @@ namespace Pinetime {
 
         /** Total length in seconds */
         int totalLength = 0;
-        /** Current length in seconds */
-        int currentLength;
-        /** Last length */
-        int lastLength;
+        /** Current position in seconds */
+        int currentPosition;
         /** Last time an animation update or timer was incremented */
         TickType_t lastIncrement = 0;