lib_src: Sample rate conversion

• Introduction
  • lib_src components
  • Using lib_src
• HiFi quality multi-rate SRC
  • Initialisation
  • Processing
  • Buffer formats
  • Performance and resource utilisation
    • Audio performance
    • SSRC resource utilisation
    • ASRC performance
    • ASRC latency / group delay
  • Implementation detail
    • SSRC structure
    • ASRC structure
    • SRC filter list
  • File structure and overview
  • SSRC API
  • ASRC API
• HiFi quality fixed factor of 3 SRC
  • Shared API items
  • HiFi quality DS3 API
  • HiFi quality OS3 API
• Voice quality fixed factor of 3 SRC
  • Voice quality DS3 API
  • Voice quality US3 API
• Voice quality fixed factor of 3 and 3/2 SRC optimised for XS3
  • Fixed factor of 3 VPU implementation
  • Voice quality DS3 VPU API
  • Voice quality US3 VPU API
  • Fixed factor of 3/2 VPU implementation
  • Voice quality DS3/2 API
  • Voice quality US3/2 API
• Asynchronous FIFO
  • Using the asynchronous FIFO
  • Design parameters
    • Practical FIFO sizing for ASRC usage
  • Controller settings
  • API
  • Implementation detail
    • Measurements for the PID
    • Implementation of asynchronicity
    • Communication and reset protocol summary
• ASRC Task
  • Operation
  • Latency characterisation
  • API & usage
• Performance characterisation
  • Pure Tone FFT SRC plots across sample rate combinations
    • Frequency error: 0.999900Hz
    • Frequency error: 1.000000Hz
    • Frequency error: 1.000100Hz
  • Summary table