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
39 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 Linux Hardware Reviews
  1. AMD's Open-Source Radeon Linux Driver: 2014 Was Incredible
  2. ASRock X99 Extreme3 Is An Affordable Choice For Linux Users
  3. A Walkthrough Of The New 32 System Open-Source Linux Benchmarking Test Farm
  4. Habey MITX-6771: Mini-ITX Board With Quad-Core J1900 Bay Trail
Latest Linux Articles
  1. 2014 Year-End NVIDIA Linux Benchmark Comparison
  2. 2014 Catalyst Linux Graphics Benchmarks Year-In-Review
  3. 17-Way Linux Graphics Card Comparison With Civilization Beyond Earth
  4. AMD Kaveri: Open-Source Radeon Gallium3D vs. Catalyst 14.12 Omega Driver
Latest Linux News
  1. The Most Exciting Fedora News Of 2014
  2. Portable C Compiler 1.1.0 Released (PCC 1.1)
  3. That Peculiar Linux 3.18 Kernel Bug Might Be Closed Soon
  4. The Most Viewed Compiler News & Milestones Of This Year
  5. The Most Significant Linux Gaming Milestones Of 2014
  6. Biggest Linux Kernel Features & Work Of 2014
  7. Valve Optimizations, D3D9 & GL4 Topped Mesa This Year
  8. Minetest 0.4.11 Released As Open-Source Alternative To Minecraft
  9. SPI Hasn't Yet Voted On X.Org As An Associated Project
  10. The Most Controversial Systemd Stories This Year
Latest Forum Discussions
  1. Why is it that Radeon cannot run good old (ancient) Doom 3 engine games?
  2. MONITORed values : possible to force the time interval between two measurements ?
  3. Debian init discussion in Phoenix Wright format
  4. Need some hand holding with upgrading xserver
  5. Aliens vs predator for Linux
  6. FPS capped on Linux (AMD fglrx drivers)
  7. Speeding up systemd networking service
  8. Storm Engine 2 (Doom 3 BFG GPL fork) got entry on IndieDb