Android audio hardware abstraction layer (HAL) analysis
Audio plays an important role in the Android system, which enables us to enjoy rich music, video and game experiences. Android provides an audio hardware abstraction layer (HAL), which allows developers to interact with the underlying audio hardware. This article will analyze the Android audio HAL, and provide the corresponding source code and description.
The Android Audio HAL is an interface layer between the operating system and the audio hardware. It is responsible for managing audio hardware devices, processing audio data mixing, sampling rate conversion, audio effect processing and other functions. Through the HAL, the application can implement audio input and output through simple interface calls.
The following is a simple sample code showing how to use the Android Audio HAL to play local audio files:
import android.media.AudioFormat;
import android.media.AudioManager