diff --git a/internal_filesystem/apps/com.micropythonos.soundrecorder/assets/sound_recorder.py b/internal_filesystem/apps/com.micropythonos.soundrecorder/assets/sound_recorder.py index d6fe4ba1..294e7eb7 100644 --- a/internal_filesystem/apps/com.micropythonos.soundrecorder/assets/sound_recorder.py +++ b/internal_filesystem/apps/com.micropythonos.soundrecorder/assets/sound_recorder.py @@ -35,8 +35,13 @@ class SoundRecorder(Activity): """ # Constants - MAX_DURATION_MS = 60000 # 60 seconds max recording RECORDINGS_DIR = "data/recordings" + SAMPLE_RATE = 16000 # 16kHz + BYTES_PER_SAMPLE = 2 # 16-bit audio + BYTES_PER_SECOND = SAMPLE_RATE * BYTES_PER_SAMPLE # 32000 bytes/sec + MIN_DURATION_MS = 5000 # Minimum 5 seconds + MAX_DURATION_MS = 3600000 # Maximum 1 hour (absolute cap) + SAFETY_MARGIN = 0.80 # Use only 80% of available space # UI Widgets _status_label = None @@ -57,6 +62,9 @@ class SoundRecorder(Activity): def onCreate(self): screen = lv.obj() + # Calculate max duration based on available storage + self._current_max_duration_ms = self._calculate_max_duration() + # Title title = lv.label(screen) title.set_text("Sound Recorder") @@ -69,7 +77,7 @@ class SoundRecorder(Activity): # Timer display self._timer_label = lv.label(screen) - self._timer_label.set_text("00:00 / 01:00") + self._timer_label.set_text(self._format_timer_text(0)) self._timer_label.align(lv.ALIGN.CENTER, 0, -30) self._timer_label.set_style_text_font(lv.font_montserrat_24, 0) @@ -123,6 +131,9 @@ class SoundRecorder(Activity): def onResume(self, screen): super().onResume(screen) + # Recalculate max duration (storage may have changed) + self._current_max_duration_ms = self._calculate_max_duration() + self._timer_label.set_text(self._format_timer_text(0)) self._update_status() self._find_last_recording() @@ -170,6 +181,57 @@ class SoundRecorder(Activity): print(f"SoundRecorder: Error finding recordings: {e}") self._last_recording = None + def _calculate_max_duration(self): + """ + Calculate maximum recording duration based on available storage. + Returns duration in milliseconds. + """ + try: + # Ensure recordings directory exists + _makedirs(self.RECORDINGS_DIR) + + # Get filesystem stats for the recordings directory + stat = os.statvfs(self.RECORDINGS_DIR) + + # Calculate free space in bytes + # f_bavail = free blocks available to non-superuser + # f_frsize = fragment size (fundamental block size) + free_bytes = stat[0] * stat[4] # f_frsize * f_bavail + + # Apply safety margin (use only 80% of available space) + usable_bytes = int(free_bytes * self.SAFETY_MARGIN) + + # Calculate max duration in seconds + max_seconds = usable_bytes // self.BYTES_PER_SECOND + + # Convert to milliseconds + max_ms = max_seconds * 1000 + + # Clamp to min/max bounds + max_ms = max(self.MIN_DURATION_MS, min(max_ms, self.MAX_DURATION_MS)) + + print(f"SoundRecorder: Free space: {free_bytes} bytes, " + f"usable: {usable_bytes} bytes, max duration: {max_ms // 1000}s") + + return max_ms + + except Exception as e: + print(f"SoundRecorder: Error calculating max duration: {e}") + # Fall back to a conservative 60 seconds + return 60000 + + def _format_timer_text(self, elapsed_ms): + """Format timer display text showing elapsed / max time.""" + elapsed_sec = elapsed_ms // 1000 + max_sec = self._current_max_duration_ms // 1000 + + elapsed_min = elapsed_sec // 60 + elapsed_sec_display = elapsed_sec % 60 + max_min = max_sec // 60 + max_sec_display = max_sec % 60 + + return f"{elapsed_min:02d}:{elapsed_sec_display:02d} / {max_min:02d}:{max_sec_display:02d}" + def _generate_filename(self): """Generate a timestamped filename for the recording.""" # Get current time @@ -200,17 +262,26 @@ class SoundRecorder(Activity): file_path = self._generate_filename() print(f"SoundRecorder: Generated filename: {file_path}") + # Recalculate max duration before starting (storage may have changed) + self._current_max_duration_ms = self._calculate_max_duration() + + if self._current_max_duration_ms < self.MIN_DURATION_MS: + print("SoundRecorder: Not enough storage space") + self._status_label.set_text("Not enough storage space") + self._status_label.set_style_text_color(lv.color_hex(0xAA0000), 0) + return + # Start recording print(f"SoundRecorder: Calling AudioFlinger.record_wav()") print(f" file_path: {file_path}") - print(f" duration_ms: {self.MAX_DURATION_MS}") - print(f" sample_rate: 16000") + print(f" duration_ms: {self._current_max_duration_ms}") + print(f" sample_rate: {self.SAMPLE_RATE}") success = AudioFlinger.record_wav( file_path=file_path, - duration_ms=self.MAX_DURATION_MS, + duration_ms=self._current_max_duration_ms, on_complete=self._on_recording_complete, - sample_rate=16000 + sample_rate=self.SAMPLE_RATE ) print(f"SoundRecorder: record_wav returned: {success}") @@ -281,7 +352,7 @@ class SoundRecorder(Activity): if self._timer_task: self._timer_task.delete() self._timer_task = None - self._timer_label.set_text("00:00 / 01:00") + self._timer_label.set_text(self._format_timer_text(0)) def _update_timer(self, timer): """Update timer display (called periodically).""" @@ -289,17 +360,7 @@ class SoundRecorder(Activity): return elapsed_ms = time.ticks_diff(time.ticks_ms(), self._record_start_time) - elapsed_sec = elapsed_ms // 1000 - max_sec = self.MAX_DURATION_MS // 1000 - - elapsed_min = elapsed_sec // 60 - elapsed_sec = elapsed_sec % 60 - max_min = max_sec // 60 - max_sec_display = max_sec % 60 - - self._timer_label.set_text( - f"{elapsed_min:02d}:{elapsed_sec:02d} / {max_min:02d}:{max_sec_display:02d}" - ) + self._timer_label.set_text(self._format_timer_text(elapsed_ms)) def _on_play_clicked(self, event): """Handle play button click."""