80 lines
2.5 KiB
Markdown
80 lines
2.5 KiB
Markdown
# Audio player component for esp32
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[](https://github.com/chmorgan/esp-audio-player/actions/workflows/cppcheck.yml)
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## Capabilities
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* MP3 decoding (via libhelix-mp3)
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* Wav/wave file decoding
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## Who is this for?
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Decode only audio playback on esp32 series of chips, where the features and footprint of esp-adf are not
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necessary.
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## What about esp-adf?
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This component is not intended to compete with esp-adf, a much more fully developed
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audio framework.
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It does however have a number of advantages at the moment including:
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* Fully open source (esp-adf has a number of binary modules at the moment)
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* Minimal size (it's less capable, but also simpler, than esp-adf)
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## Getting started
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### Examples
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* [esp-box mp3_demo](https://github.com/espressif/esp-box/tree/master/examples/mp3_demo) uses esp-audio-player.
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* The [test example](https://github.com/chmorgan/esp-audio-player/tree/main/test) is a simpler example than mp3_demo that also uses the esp-box hardware.
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### How to use this?
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[esp-audio-player is a component](https://components.espressif.com/components/chmorgan/esp-audio-player) on the [Espressif component registry](https://components.espressif.com).
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In your project run:
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```
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idf.py add-dependency chmorgan/esp-audio-player
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```
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to add the component dependency to the project's manifest file.
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## Dependencies
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For MP3 support you'll need the [esp-libhelix-mp3](https://github.com/chmorgan/esp-libhelix-mp3) component.
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## Tests
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Unity tests are implemented in the [test/](../test) folder.
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## States
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```mermaid
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stateDiagram-v2
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[*] --> Idle : new(), cb(IDLE)
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Idle --> Playing : play(), cb(PLAYING)
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Playing --> Paused : pause(), cb(PAUSE)
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Paused --> Playing : resume(), cb(PLAYING)
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Playing --> Playing : play(), cb(COMPLETED_PLAYING_NEXT)
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Paused --> Idle : stop(), cb(IDLE)
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Playing --> Idle : song complete, cb(IDLE)
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[*] --> Shutdown : delete(), cb(SHUTDOWN)
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Shutdown --> Idle : new(), cb(IDLE)
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```
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Note: Diagram shortens callbacks from AUDIO_PLAYER_EVENT_xxx to xxx, and functions from audio_player_xxx() to xxx(), for clarity.
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## Release process - Pushing component to the IDF Component Registry
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The github workflow, .github/workflows/esp_upload_component.yml, pushes data to the espressif
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[IDF component registry](https://components.espressif.com).
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To push a new version:
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* Apply a git tag via 'git tag vA.B.C'
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* Push tags via 'git push --tags'
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The github workflow *should* run and automatically push to the IDF component registry.
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