Always clean-build in Docker to avoid stale binary

The Docker build target now runs `make clean all` instead of bare
`make`, so it rebuilds regardless of an existing build/sdlamp2.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docker-arm64/Makefile

@@ -18,7 +18,7 @@ shell:
 endif
 
 build: .build
-	docker run --platform linux/arm64 --rm -v "$(PROJECT_DIR)":/workspace $(IMAGE_NAME) make
+	docker run --platform linux/arm64 --rm -v "$(PROJECT_DIR)":/workspace $(IMAGE_NAME) make clean all
 
 clean:
 	docker rmi $(IMAGE_NAME)

docs/sdlamp2-fsd.md

@@ -7,7 +7,7 @@
 | Version | 1.0        |
 | Status  | Draft      |
 | Created | 2026-02-10 |
-| Updated | 2026-02-10 |
+| Updated | 2026-02-13 |
 
 ## 1. Purpose
 
@@ -43,6 +43,18 @@ This document specifies the functional requirements for an SDL2 based media play
 
 ## 6. Changelog
 
+### 2026-02-13 — Combine Play/Stop, add Previous Cassette button
+
+- **Play/Stop combined**: The separate Stop and Play buttons are merged into a single toggle button that shows the play icon (▶) when paused and the stop icon (■) when playing.
+- **Previous Cassette**: A new "Previous Cassette" button is added at the left of the transport controls, mirroring "Next Cassette". Wraps from the first tape to the last.
+- **New layout**: `[Volume] [Prev] [Rewind] [Play/Stop] [FF] [Next]` — same 6 focusable elements, same positions.
+
+### 2026-02-13 — Start paused, fix next-tape autoplay, quiet joystick log
+
+- **Start paused**: The player no longer autoplays on startup; it opens the last file at the saved position but waits for the user to press Play.
+- **Next tape respects pause state**: `switch_file()` no longer forces playback. Pressing "next tape" while paused switches the file and stays paused; pressing it while playing switches and continues playing.
+- **Joystick log behind --debug**: The "Joystick: ..." message is now only printed when `--debug` is passed.
+
 ### 2026-02-13 — arm64 Docker build container
 
 - **New build container**: Replaced the broken Buildroot cross-compilation toolchain (`docker/`) with an arm64 Ubuntu 22.04 Docker container (`docker-arm64/`). Runs via QEMU user-mode emulation on x86 hosts and matches the target device exactly (same distro, same glibc, same library versions). The project's native `make` works as-is inside the container — no cross-compilation flags needed.

src/sdlamp2.c

@@ -57,15 +57,15 @@ static int current_file_index = 0;
 /* --- Focus / navigation --- */
 
 #define FOCUS_VOLUME 0
-#define FOCUS_REWIND 1
-#define FOCUS_STOP 2
-#define FOCUS_PLAY 3
+#define FOCUS_PREV 1
+#define FOCUS_REWIND 2
+#define FOCUS_PLAYSTOP 3
 #define FOCUS_FF 4
 #define FOCUS_NEXT 5
 #define FOCUS_COUNT 6
 
 static float volume = 0.5f;
-static int focus_index = FOCUS_PLAY;
+static int focus_index = FOCUS_PLAYSTOP;
 static SDL_GameController* controller = NULL;
 static SDL_Joystick* joystick = NULL;
 static int debug_mode = 0;
@@ -478,8 +478,7 @@ static void switch_file(int index) {
       snprintf(title, sizeof(title), "SDLamp2 - %s", current_file);
       SDL_SetWindowTitle(window, title);
 
-      paused = SDL_FALSE;
-      SDL_PauseAudioDevice(audio_device, 0);
+      SDL_PauseAudioDevice(audio_device, paused);
       return;
     }
 
@@ -495,13 +494,22 @@ static void switch_file(int index) {
 
 static void activate_focused_button(void) {
   switch (focus_index) {
+    case FOCUS_PREV:
+      if (num_audio_files > 0) {
+        int prev = (current_file_index - 1 + num_audio_files) % num_audio_files;
+        switch_file(prev);
+      }
+      break;
     case FOCUS_REWIND: {
       double pos = get_current_seconds() - SEEK_SECONDS;
       decoder_seek(pos < 0.0 ? 0.0 : pos);
       break;
     }
-    case FOCUS_STOP:
-      if (!paused) {
+    case FOCUS_PLAYSTOP:
+      if (paused && num_audio_files > 0) {
+        paused = SDL_FALSE;
+        SDL_PauseAudioDevice(audio_device, 0);
+      } else if (!paused) {
         paused = SDL_TRUE;
         SDL_PauseAudioDevice(audio_device, 1);
         if (current_file[0]) {
@@ -509,12 +517,6 @@ static void activate_focused_button(void) {
         }
       }
       break;
-    case FOCUS_PLAY:
-      if (paused && num_audio_files > 0) {
-        paused = SDL_FALSE;
-        SDL_PauseAudioDevice(audio_device, 0);
-      }
-      break;
     case FOCUS_FF: {
       double pos = get_current_seconds() + SEEK_SECONDS;
       double dur = get_duration_seconds();
@@ -554,21 +556,22 @@ int main(int argc, char** argv) {
   const SDL_Rect volume_bg = {25, 390, 30, 80};
 
   /* Button positions (bottom of window, centered) */
-  const SDL_Rect rewind_btn = {80, 390, 80, 80};
-  const SDL_Rect stop_btn = {180, 390, 80, 80};
-  const SDL_Rect play_btn = {280, 390, 80, 80};
+  const SDL_Rect prev_btn = {80, 390, 80, 80};
+  const SDL_Rect rewind_btn = {180, 390, 80, 80};
+  const SDL_Rect playstop_btn = {280, 390, 80, 80};
   const SDL_Rect ff_btn = {380, 390, 80, 80};
   const SDL_Rect next_btn = {480, 390, 80, 80};
 
   /* Array of focusable rects indexed by FOCUS_* constants */
-  const SDL_Rect* focus_rects[FOCUS_COUNT] = {&volume_bg, &rewind_btn, &stop_btn,
-                                               &play_btn,  &ff_btn,     &next_btn};
+  const SDL_Rect* focus_rects[FOCUS_COUNT] = {&volume_bg,    &prev_btn, &rewind_btn,
+                                               &playstop_btn, &ff_btn,   &next_btn};
 
   /* Sprite sheet source rects */
   const SDL_Rect rewind_sprite = {0, 0, 200, 200};
   const SDL_Rect play_sprite = {220, 0, 200, 200};
   const SDL_Rect ff_sprite = {440, 0, 200, 200};
   const SDL_Rect stop_sprite = {0, 220, 200, 200};
+  const SDL_Rect prev_sprite = {440, 220, 200, 200};  /* same circle as next */
   const SDL_Rect next_sprite = {440, 220, 200, 200};
 
   /* Progress bar area */
@@ -630,7 +633,7 @@ int main(int argc, char** argv) {
     for (int i = 0; i < num_joy; i++) {
       joystick = SDL_JoystickOpen(i);
       if (joystick) {
-        printf("Joystick: %s\n", SDL_JoystickName(joystick));
+        if (debug_mode) printf("Joystick: %s\n", SDL_JoystickName(joystick));
         break;
       }
     }
@@ -902,9 +905,10 @@ int main(int argc, char** argv) {
     }
 
     /* Buttons */
+    SDL_RenderCopy(renderer, controls_texture, &prev_sprite, &prev_btn);
     SDL_RenderCopy(renderer, controls_texture, &rewind_sprite, &rewind_btn);
-    SDL_RenderCopy(renderer, controls_texture, &stop_sprite, &stop_btn);
-    SDL_RenderCopy(renderer, controls_texture, &play_sprite, &play_btn);
+    SDL_RenderCopy(renderer, controls_texture, paused ? &play_sprite : &stop_sprite,
+                   &playstop_btn);
     SDL_RenderCopy(renderer, controls_texture, &ff_sprite, &ff_btn);
     SDL_RenderCopy(renderer, controls_texture, &next_sprite, &next_btn);