run audio-only playback through audio slot

cmd/mxl-player/main.go

@@ -8,6 +8,7 @@ import (
 	"log"
 	mxladapter "mxl-player/internal/adapter/mxl"
 	"mxl-player/internal/imgui"
+	"mxl-player/internal/output"
 	"mxl-player/internal/playback"
 	"mxl-player/internal/renderer"
 	"mxl-player/internal/sdl"
@@ -149,6 +150,7 @@ func main() {
 	}
 	// path selection
 	useVideoSlot := args.AudioFlowId == ""
+	useAudioSlot := args.AudioFlowId != "" && args.VideoFlowId == ""
 
 	runtime.LockOSThread()
 	if err := sdl.Load(); err != nil {
@@ -303,25 +305,7 @@ func main() {
 	case args.VideoFlowId != "":
 		// VideoSlot owns opening and closing the video reader.
 	case args.AudioFlowId != "":
-		audioSrc, err = source.OpenAudio(args.Domain, args.AudioFlowId)
-		if err != nil {
-			log.Fatalf("audio source: %v", err)
-		}
-		aChans = audioSrc.Channels()
-		audioBatch = uint64(audioSrc.Rate().Num) / (100 * uint64(audioSrc.Rate().Den))
-		if audioBatch == 0 {
-			audioBatch = 1
-		}
-		audioStream = sdl.OpenAudioDeviceStream(sdlAudioDevice, sdl.AudioSpec{
-			Format:   sdl.AudioF32,
-			Channels: int32(aChans),
-			Freq:     int32(audioSrc.Rate().Num / audioSrc.Rate().Den),
-		})
-		if audioStream == 0 {
-			log.Fatalf("audio: %s", sdl.GetError())
-		}
-		sdl.ResumeAudioStreamDevice(audioStream)
-		fmt.Printf("audio: %dch %d/%d Hz\n", aChans, audioSrc.Rate().Num, audioSrc.Rate().Den)
+		// AudioSlot owns opening and closing the audio reader.
 	default:
 		// No configured feeds. Renderer and GUI use the placeholder.
 	}
@@ -390,6 +374,7 @@ func main() {
 		showStats bool   = true
 	)
 	videoActive := args.VideoFlowId != ""
+	audioActive := useAudioSlot
 
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
@@ -437,6 +422,44 @@ func main() {
 	}
 	videoCommands := make(chan playback.FeedConfig, 1)
 
+	audioOutput := output.NewSDLAudioSink(sdlAudioDevice)
+	defer audioOutput.Close()
+	audioWorker, err := playback.NewAudioWorker(
+		mxladapter.AudioFactory{},
+		audioOutput,
+		retryPolicy,
+		mxladapter.ShouldRetry,
+		func(status playback.Status) {
+			statusStore.Observe(status)
+
+			if status.Err != nil {
+				log.Printf(
+					"audio: state=%v attempt=%d failed=%d: %v",
+					status.State,
+					status.Attempt,
+					status.FailedAttempts,
+					status.Err,
+				)
+				return
+			}
+
+			log.Printf(
+				"audio: state=%v attempt=%d failed=%d",
+				status.State,
+				status.Attempt,
+				status.FailedAttempts,
+			)
+		},
+	)
+	if err != nil {
+		panic(err)
+	}
+	audioSlot, err := playback.NewAudioSlot(audioWorker)
+	if err != nil {
+		panic(err)
+	}
+	audioCommands := make(chan playback.FeedConfig, 1)
+
 	reopen := func(params reconnectParams) error {
 		// Close current sources
 		if syncSrc != nil {
@@ -499,6 +522,17 @@ func main() {
 		default:
 		}
 	}
+	enqueueAudioConfig := func(config playback.FeedConfig) {
+		select {
+		case <-audioCommands:
+		default:
+		}
+
+		select {
+		case audioCommands <- config:
+		default:
+		}
+	}
 
 	doReconnect := func() {
 		if useVideoSlot {
@@ -516,6 +550,22 @@ func main() {
 			enqueueVideoConfig(config)
 			return
 		}
+		if useAudioSlot {
+			audioActive = audioStr != ""
+
+			config := playback.FeedConfig{}
+			if audioStr != "" {
+				config = playback.FeedConfig{
+					Domain: domainStr,
+					UUID:   audioStr,
+					Active: true,
+				}
+			}
+
+			enqueueAudioConfig(config)
+			return
+		}
+		// legacy
 		select {
 		case <-control:
 		default:
@@ -542,6 +592,21 @@ func main() {
 			}
 			return
 		}
+		if useAudioSlot {
+			err := audioSlot.Run(
+				ctx,
+				playback.FeedConfig{
+					Domain: args.Domain,
+					UUID:   args.AudioFlowId,
+					Active: args.AudioFlowId != "",
+				},
+				audioCommands,
+			)
+			if err != nil && !errors.Is(err, context.Canceled) {
+				log.Printf("audio slot: %v", err)
+			}
+			return
+		}
 
 		// Audio-only mode: independent loop.
 		if audioSrc != nil && syncSrc == nil && videoSrc == nil {
@@ -929,6 +994,71 @@ func main() {
 					cimgui.Text("Video actual: not started")
 				}
 			}
+			if useAudioSlot && audioActive {
+				if cimgui.Button("Stop audio") {
+					audioActive = false
+					enqueueAudioConfig(playback.FeedConfig{
+						Domain: domainStr,
+						UUID:   audioStr,
+						Active: false,
+					})
+				}
+			}
+
+			if useAudioSlot && !audioActive && audioStr != "" {
+				if cimgui.Button("Resume audio") {
+					audioActive = true
+					enqueueAudioConfig(playback.FeedConfig{
+						Domain: domainStr,
+						UUID:   audioStr,
+						Active: true,
+					})
+				}
+			}
+
+			if useAudioSlot && audioStr != "" {
+				if cimgui.Button("Remove audio") {
+					audioActive = false
+					audioStr = ""
+					enqueueAudioConfig(playback.FeedConfig{})
+				}
+			}
+
+			if useAudioSlot {
+				if audioActive {
+					cimgui.Text("Audio desired: active")
+				} else if audioStr != "" {
+					cimgui.Text("Audio desired: stopped")
+				} else {
+					cimgui.Text("Audio desired: not configured")
+				}
+
+				if status, ok := statusStore.Snapshot(playback.UnitAudio); ok {
+					cimgui.Text(fmt.Sprintf(
+						"Audio actual: %s",
+						status.State,
+					))
+					cimgui.Text(fmt.Sprintf(
+						"Attempt: %d, failed: %d",
+						status.Attempt,
+						status.FailedAttempts,
+					))
+
+					if status.RetryIn > 0 {
+						cimgui.Text(fmt.Sprintf(
+							"Retry in: %s",
+							status.RetryIn.Round(time.Millisecond),
+						))
+					}
+
+					if status.Err != nil {
+						cimgui.TextWrapped(status.Err.Error())
+					}
+				} else {
+					cimgui.Text("Audio actual: not started")
+				}
+			}
+
 			cimgui.End()
 			gui.EndFrame()
 			lastFrame = time.Now()

imgui.ini

@@ -14,7 +14,7 @@ Size=200,200
 Collapsed=0
 
 [Window][Connection]
-Pos=979,700
-Size=695,233
+Pos=174,363
+Size=986,237
 Collapsed=0