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Using ALSA audio drivers in Android
https://jichu4n.com/posts/using-alsa-audio-drivers-in-android/
Using ALSA audio drivers in Android. While working on a port of the Gingerbread (2.3.7) userland of Android for the N810, I had to figure out how to add support for an audio chip with a working ALSA driver in an Android build. The information was out there but it took me a while to figure everything out, so here’s a brief summary of the process.
android - About ALSA driver: How to handle Audio …
https://stackoverflow.com/questions/17194777/about-alsa-driver-how-to-handle-audio-devices-correctly
Actually ,I have studied part of source code of alsa-lib-1.0.27.1, and tinyalsa(for android devices). And I studied audio driver of Samsung Devices. User space application uses /dev/snd/pcmXXXXX to play/capture audio data. However, there is a problem.If there is only one audio devices,it is fine;
Audio | Android Open Source Project
https://source.android.com/devices/audio/
For more details, refer to the audio HAL interface and comments in the *.hal files of the corresponding HAL version directory. Kernel driver The audio driver interacts with your hardware and HAL implementation. You can use Advanced Linux Sound Architecture (ALSA), Open Sound System (OSS), or a custom driver (HAL is driver-agnostic).
IMX6 Implementing Dummy ALSA Driver in Android - NXP
https://community.nxp.com/t5/i-MX-Processors/IMX6-Implementing-Dummy-ALSA-Driver-in-Android/m-p/409973
BSP: android_kk4.4.2_1.0.0-ga CPU: imx6dl I have an Android device that doesn't have any audio codecs and Android doesn't seem to like that very much. I am using a Parallel LCD rather than HDMI so it seems I cannot just dead-end the sound through the HDMI driver. Boot Log: usbcore: registered ne...
Android’s audio Hardware Abstraction Layer (HAL) | by ...
https://medium.com/mobidroid/androids-audio-hardware-abstraction-layer-hal-1908a403a85b
Kernel driver The audio driver interacts with your hardware and HAL implementation. You can use Advanced Linux Sound Architecture (ALSA), Open Sound System (OSS), or a custom driver (HAL is driver ...
Android Audio's 10 Millisecond Problem: The Android …
https://superpowered.com/androidaudiopathlatency
Android runs "on top" of Linux, and most Android devices use the most popular Linux audio driver system, ALSA (Advanced Linux Sound Architecture). ALSA handles the ring buffer like this: Audio is consumed from the ring buffer in "period size" steps. The ring buffer's size is a multiple of the "period size". For example: Period size = 480 samples.
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