audio: reduce code size #10036
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audio: reduce code size #10036
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This also helps set the stage for #9877: The data for managing the first/second buffer would be placed in the common structure, and the logic in the wrapper to get_buffer. Then, the individual sample implementations need no longer care about the single channel case. |
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there are some lines above that set it OFF if needed; the top level logic will set it ON if audiocore is enabled. Before this, some boards without any audio capability (e.g., pycamera with esp32s3, lacking both audioio and i2s) enabled mp3. This was not useful, and with other changes it will become a build error.
By placing certain fields in a fixed location in all sample types, code can be reduced & reused. For instance, the same property object can be used for every sample type's `sample_rate` property. The sample proto functions like `sample_rate` become superfluous since once an object is verified to support the audiosample protocol, direct access to the fields in the base object is possible.
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Oops, this should have been a draft because I hadn't tested it on any hw. I will do some basic testing when I'm back at home, hopefully any problems are minor |
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Feb 9, 2025
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By placing certain fields in a fixed location in all sample types code can be reduced & reused. For instance, the same property object can be used for every sample type's
sample_rateproperty.The sample proto functions like
sample_ratebecome superfluous since once an object is verified to support the audiosample protocol, direct access to the fields in the base object is possible.However, it's necessary to carefully initialize all the new fields. Some sample types, like Synthesizer & MidiTrack, are tested during CI. Others are not.
Saves 676 bytes flash on itsybitsy m0, 1872 bytes on metro rp2350. Net deletes a bit over 400 lines of code
Todo: