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7790a61c08
This is the initial commit for esp_codec_dev, including follow features: 1: Add driver for common audio codec device (es8311, es7210 etc) 2: Add abstract interfaces for codec device 3: Add easy-to-use high-level API for playback and recording 4: Support customize driver for new codec device 5: Support volume curve, support built-in software volume control and customized volume control 6: Easy to port to other platform after re-implement of platform