From 19e2e076e9c3d99f6fc86cdd298006d058d3e27c Mon Sep 17 00:00:00 2001
From: Dmitry Sergeev <mrjitten@protonmail.com>
Date: Tue, 1 Sep 2026 00:43:57 +0300
Subject: [PATCH] playback composition object

---
 cmd/mxl-player/playback_runtime.go      | 127 ++++++++++++++++++++++++
 cmd/mxl-player/playback_runtime_test.go |  42 ++++++++
 imgui.ini                               |   2 +-
 3 files changed, 170 insertions(+), 1 deletion(-)
 create mode 100644 cmd/mxl-player/playback_runtime.go
 create mode 100644 cmd/mxl-player/playback_runtime_test.go

diff --git a/cmd/mxl-player/playback_runtime.go b/cmd/mxl-player/playback_runtime.go
new file mode 100644
index 0000000..8291fa1
--- /dev/null
+++ b/cmd/mxl-player/playback_runtime.go
@@ -0,0 +1,127 @@
+package main
+
+import (
+	"log"
+
+	mxladapter "mxl-player/internal/adapter/mxl"
+	"mxl-player/internal/output"
+	"mxl-player/internal/playback"
+)
+
+type playerPlayback struct {
+	Controller *playback.SessionController
+	Commands   chan playback.SessionCommand
+	Video      *playback.VideoBridge
+	Status     *playback.StatusStore
+	Audio      *output.SDLAudioSink
+}
+
+func newPlayerPlayback(
+	audioDevice uint32,
+	retry playback.RetryPolicy,
+) (*playerPlayback, error) {
+	videoBridge := playback.NewVideoBridge()
+	statusStore := playback.NewStatusStore()
+	audioSink := output.NewSDLAudioSink(audioDevice)
+
+	observe := func(status playback.Status) {
+		statusStore.Observe(status)
+
+		if status.Err != nil {
+			log.Printf(
+				"%s: state=%v attempt=%d failed=%d: %v",
+				status.Unit,
+				status.State,
+				status.Attempt,
+				status.FailedAttempts,
+				status.Err,
+			)
+			return
+		}
+
+		log.Printf(
+			"%s: state=%v attempt=%d failed=%d",
+			status.Unit,
+			status.State,
+			status.Attempt,
+			status.FailedAttempts,
+		)
+	}
+
+	videoWorker, err := playback.NewVideoWorker(
+		mxladapter.VideoFactory{},
+		videoBridge,
+		retry,
+		mxladapter.ShouldRetry,
+		observe,
+	)
+	if err != nil {
+		_ = audioSink.Close()
+		return nil, err
+	}
+	videoSlot, err := playback.NewVideoSlot(videoWorker)
+	if err != nil {
+		_ = audioSink.Close()
+		return nil, err
+	}
+
+	audioWorker, err := playback.NewAudioWorker(
+		mxladapter.AudioFactory{},
+		audioSink,
+		retry,
+		mxladapter.ShouldRetry,
+		observe,
+	)
+	if err != nil {
+		_ = audioSink.Close()
+		return nil, err
+	}
+	audioSlot, err := playback.NewAudioSlot(audioWorker)
+	if err != nil {
+		_ = audioSink.Close()
+		return nil, err
+	}
+
+	syncWorker, err := playback.NewSyncWorker(
+		mxladapter.SyncFactory{},
+		videoBridge,
+		audioSink,
+		retry,
+		mxladapter.ShouldRetry,
+		observe,
+	)
+	if err != nil {
+		_ = audioSink.Close()
+		return nil, err
+	}
+	syncSlot, err := playback.NewSyncSlot(syncWorker)
+	if err != nil {
+		_ = audioSink.Close()
+		return nil, err
+	}
+
+	controller, err := playback.NewSessionController(
+		videoSlot,
+		audioSlot,
+		syncSlot,
+		func(video, audio playback.FeedConfig) bool {
+			return video.Domain == audio.Domain
+		},
+	)
+	if err != nil {
+		_ = audioSink.Close()
+		return nil, err
+	}
+
+	return &playerPlayback{
+		Controller: controller,
+		Commands:   make(chan playback.SessionCommand, 32),
+		Video:      videoBridge,
+		Status:     statusStore,
+		Audio:      audioSink,
+	}, nil
+}
+
+func (p *playerPlayback) Close() error {
+	return p.Audio.Close()
+}
diff --git a/cmd/mxl-player/playback_runtime_test.go b/cmd/mxl-player/playback_runtime_test.go
new file mode 100644
index 0000000..4cc50dd
--- /dev/null
+++ b/cmd/mxl-player/playback_runtime_test.go
@@ -0,0 +1,42 @@
+package main
+
+import (
+	"testing"
+	"time"
+
+	"mxl-player/internal/playback"
+)
+
+func validRuntimeRetryPolicy() playback.RetryPolicy {
+	return playback.RetryPolicy{
+		MaxAttempts:  3,
+		InitialDelay: time.Millisecond,
+		MaxDelay:     time.Second,
+	}
+}
+
+func TestNewPlayerPlaybackBuildsCompleteRuntime(t *testing.T) {
+	runtime, err := newPlayerPlayback(123, validRuntimeRetryPolicy())
+	if err != nil {
+		t.Fatalf("newPlayerPlayback() error = %v", err)
+	}
+	if runtime.Controller == nil || runtime.Video == nil || runtime.Status == nil || runtime.Audio == nil {
+		t.Fatalf("newPlayerPlayback() = %#v", runtime)
+	}
+	if runtime.Commands == nil || cap(runtime.Commands) != 32 {
+		t.Fatalf("command channel = %#v, capacity = %d", runtime.Commands, cap(runtime.Commands))
+	}
+	if err := runtime.Close(); err != nil {
+		t.Fatalf("Close() error = %v", err)
+	}
+}
+
+func TestNewPlayerPlaybackRejectsInvalidRetryPolicy(t *testing.T) {
+	runtime, err := newPlayerPlayback(123, playback.RetryPolicy{})
+	if runtime != nil {
+		t.Fatalf("newPlayerPlayback() runtime = %#v, want nil", runtime)
+	}
+	if err == nil {
+		t.Fatal("newPlayerPlayback() error is nil")
+	}
+}
diff --git a/imgui.ini b/imgui.ini
index 6a67a49..e3ffc14 100644
--- a/imgui.ini
+++ b/imgui.ini
@@ -14,7 +14,7 @@ Size=200,200
 Collapsed=0
 
 [Window][Connection]
-Pos=628,539
+Pos=1322,937
 Size=613,164
 Collapsed=0