1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

PulseAudio Ported To Android, Compared To AudioFlinger

Google

Published on 16 January 2012 10:18 AM EST
Written by Michael Larabel in Google
40 Comments

A developer at Collabora has brought PulseAudio to Google's Android operating system. In the process of this port he has closely compared the performance and features of the once-notorious PulseAudio stack to that of Google's AudioFlinger.

AudioFlinger is Google's audio stack equivalent to PulseAudio. AudioFlinger provides a single output path for PCM, a software mixer for various playback stream types, playback stream resampling, and a single input capture path. Collabora decided it would be interesting -- and of potential interest to their customers -- to bring the PulseAudio stack over to Android. Among the desired PulseAudio features mentioned to have on Android was its modular framework, power saving features, and flexible routing, among other traits.

Assigned to this work at Collabora was Arun Raghavan. A Galaxy Nexus running Android 4.0 "Ice Cream Sandwich" was used in the PulseAudio porting process. The Nexus has an OMAP4 processor with a chip that has "pretty good support for running stock Linux", making it a good candidate for the PulseAudio work.

Raghavan integrated PulseAudio into the base Android system (rather than an Android NDK), brought the various PulseAudio dependencies over to Android, and other various work was needed.

On his blog, Raghavan extensively details the PulseAudio porting process. He also shares some of his findings. This includes PulseAudio's CPU usage is generally more favorable than AudioFlinger, the memory consumption between the two audio stacks is comparable but slightly more favorable to AudioFlinger, and the power consumption was definitely in favor of PulseAudio. The PulseAudio power savings features were working much better than Google's audio implementation for Android. In his blog post he also compares the features of the two Linux audio stacks.

Arun Raghavan will be upstreaming the work he did for PulseAudio on Android. He also plans to write a wrapper on top of PulseAudio that would expose AudioFlinger APIs for audio and policy so that PulseAudio could serve as a drop-in replacement to the default Android audio stack. There's also talk of further performance improvements for PulseAudio by taking advantage of some Android-specific features like Binder and ashmem.

What's next to come to Android? Perhaps systemd?

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Articles & Reviews
  1. OS X 10.10 vs. Ubuntu 15.04 vs. Fedora 21 Tests: Linux Sweeps The Board
  2. The New Place Where Linux Code Is Constantly Being Benchmarked
  3. 18-GPU NVIDIA/AMD Linux Comparison Of BioShock: Infinite
  4. Phoronix Test Suite 5.6 Adds New Phoromatic Enterprise Benchmarking Features
  5. OpenGL Threaded Optimizations Responsible For NVIDIA's Faster Performance?
  6. Big Graphics Card Comparison Of Metro Redux Games On Linux
Latest Linux News
  1. Git 2.4.0-rc0 Does A Ton Of Polishing
  2. The Most Common, Annoying Issue When Benchmarking Ubuntu On Many Systems
  3. Mesa Is At Nearly 1,500 Commits This Year
  4. Gestures & Other GTK3 Features For LibreOffice
  5. It's Now Easier To Try PHP 7 On Fedora & RHEL
  6. BQ Is Cleaning Up Their Aquaris E4.5 Ubuntu Kernel
  7. Allwinner Continues Jerking Around The Open-Source Community
  8. NVIDIA Linux 349.12 Beta Has Improved G-SYNC & VDPAU Features
  9. Canonical Just Made It Even Easier To Benchmark Ubuntu Linux In The Cloud
  10. NVIDIA GeForce GTX TITAN X Linux Testing Time
Most Viewed News This Week
  1. Introducing The Library Operating System For Linux
  2. AMD Is Hiring Two More Open-Source Linux GPU Driver Developers
  3. New SecureBoot Concerns Arise With Windows 10
  4. GNOME Shell & Mutter 3.16.0 Released
  5. GNU Nano 2.4.0 Brings Complete Undo System, Linter Support & More
  6. Systemd Change Allows For Stateless Systems With Tmpfs
  7. GCC 5 Compiler Is Getting Close To Being Released
  8. Red Hat Is Rolling Out A VirtIO DRM/KMS GPU Driver
%%CLICK_URL_UNESC%%