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WIP: Audio recording and playback#163

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Commits on Sep 18, 2024

• codal_port/modaudio: Extend AudioFrame constructor to take opt size.

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• codal_port/modaudio: Rework audio playing to play a long AudioFrame.

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• codal_port/modaudio: Remove buffer expansion.

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• codal_app: Add microphone recording interface.

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• codal_port/microbit_microphone: Add methods to record.

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• codal_port/modaudio: Add audio.sound_level() method.

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• src: Add test recording program.

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• codal_port/modaudio: Rename "size" field to "alloc_size".

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• codal_port/modaudio: Make AudioFrame constructor public.

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• codal_app/microbithal_microphone: Store the current recording length.

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• codal_port/modaudio: Add a "used_size" field to AudioFrame.

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• codal_port/modaudio: Add rate to AudioFrame.

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• codal_port/microbit_microphone: Use rate from AudioFrame, or update it.

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• codal_port/modaudio: Use AudioFrame rate as rate when playing it.

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• src: Update test_record.py.

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• codal_app/main: Set microphone gain to 0.2.

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• codal_port/modaudio: Take the sqrt of sound_level.

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• codal_port/modaudio: Mostly use "alloc_size" instead of "used_size".

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• codal_port/modaudio: Round up AudioFrame size to nearest 32.

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• codal_port/modaudio: Increas "used_size" when data is written.

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• src: Update test_record.py.

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• codal_port/modaudio: Update to build with latest micropython.

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• codal_app/microbithal_microphone: Make input streaming use pullInto.

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• codal_port/microbit_microphone: Implement wait argument to record_into.

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• codal_app/microbithal_microphone: Remove CODAL workaround.

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• codal_app/microbithal_microphone: Add func to set the sensitivity.

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• codal_port/microbit_microphone: Add set_sensitivity method and consts.

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• codal_port/modaudio: Ensure AudioFrame size is non-zero.

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• codal_port/microbit_microphone: Validate duration and rate args.

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• codal_port/modaudio: Allow AudioFrame to be arbitrary length.

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• codal_port/modaudio: Make None the default to AudioFrame().

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• codal_port/microbit_microphone: Require rate to be positive.

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• codal_port/modaudio: Fix typecode of AudioFrame buffer to be unsigned.

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• codal_port/modaudio: Use mp_sched_schedule_node for audio fetcher.

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• codal_port/modaudio: Separate default AudioFrame and output buffer size.

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• codal_port/modaudio: Allow output buffer to be larger than 32 bytes.

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• codal_port/modaudio: Stop streaming audio when data is exhausted.

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• codal_port: Implement AudioTrack and AudioRecording.

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• src: Update test_record.py.

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• codal_port/modaudio: Remove used_size entry from AudioFrame type.

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• codal_port/modaudio: Make AudioFrame add and mult helpers public.

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• codal_port/microbit_audiotrack: Implement +,+=,-,-=,*,*= on AudioTrack.

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• src: Update test_record.py to use mult for volume.

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• src: In test_record.py, make sure my_track is defined.

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• codal_port/microbit_audiorecording: Make track() args positional.

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• src: Use was_pressed in test_record.py.

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• codal_port/modaudio: Improve feeding of audio pipeline.

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• codal_app/microbithal_audio: Add microbit_hal_audio_is_playing() func.

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• codal_port/modaudio: Make audio waiting wait for audio to be silent.

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• codal_port/modaudio: Make sure final partial audio data is sent out.

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