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Android native AudioTrack vs amem performance

By admin | March 11, 2012

VLC for Android pre-alpha benchmarks (March 11, 2012) for two audio outputs. Specs and method are the same as in the audio benchmarks.

Sample
First 30 seconds of testfile.mp3

Results

amem
Mean: 13.24%
Median: 11.30%
Mode: 10.7%		 Native AudioTrack
Mean: 11.87%
Median: 10.40%
Mode: 10.7%

amem audio output vs Android AudioTrack

amem

PID  PPID USER     STAT   VSZ %MEM CPU %CPU COMMAND
Pass 1:
D/vlc     ( 3253): using audio output module "amem"
 3253   957 10076    S     163m 88.3   0 22.7 org.videolan.vlc
 3253   957 10076    S     161m 87.2   0 11.5 org.videolan.vlc
 3253   957 10076    S     161m 87.2   0 10.7 org.videolan.vlc
 3253   957 10076    S     161m 87.2   0 11.9 org.videolan.vlc
 3253   957 10076    S     161m 87.2   0 11.3 org.videolan.vlc
 3253   957 10076    S     161m 87.2   0 10.2 org.videolan.vlc
Pass 2:
D/vlc     ( 3366): using audio output module "amem"
 3366   957 10076    R     164m 88.7   0 23.7 org.videolan.vlc
 3366   957 10076    S     161m 87.5   0 11.7 org.videolan.vlc
 3366   957 10076    S     161m 87.5   0 11.7 org.videolan.vlc
 3366   957 10076    S     161m 87.5   0 10.5 org.videolan.vlc
 3366   957 10076    S     161m 87.5   0 11.1 org.videolan.vlc
 3366   957 10076    S     161m 87.5   0 10.9 org.videolan.vlc
Pass 3:
D/vlc     ( 3590): using audio output module "amem"
 3590   957 10076    S     164m 89.1   0 25.6 org.videolan.vlc
 3590   957 10076    S     164m 89.1   0 12.3 org.videolan.vlc
 3590   957 10076    S     164m 89.1   0 11.3 org.videolan.vlc
 3590   957 10076    S     164m 89.1   0 10.5 org.videolan.vlc
 3590   957 10076    S     164m 89.1   0 10.1 org.videolan.vlc
 3590   957 10076    S     164m 89.1   0 10.7 org.videolan.vlc

AudioTrack

PID  PPID USER     STAT   VSZ %MEM CPU %CPU COMMAND
Pass 1:
D/vlc     ( 2835): using audio output module "android_audiotrack"
 2835   957 10076    S     159m 86.0   0 10.1 org.videolan.vlc
 2835   957 10076    S     159m 86.0   0 10.4 org.videolan.vlc
 2835   957 10076    S     159m 86.0   0  9.5 org.videolan.vlc
 2835   957 10076    S     159m 86.0   0  9.4 org.videolan.vlc
 2835   957 10076    S     159m 86.0   0  9.8 org.videolan.vlc
 2835   957 10076    S     159m 86.0   0  9.2 org.videolan.vlc
Pass 2:
D/vlc     ( 2948): using audio output module "android_audiotrack"
 2948   957 10076    S     165m 89.5   0 23.5 org.videolan.vlc
 2948   957 10076    S     164m 88.7   0 11.1 org.videolan.vlc
 2948   957 10076    S     164m 88.7   0 10.4 org.videolan.vlc
 2948   957 10076    S     164m 88.7   0 10.7 org.videolan.vlc
 2948   957 10076    S     164m 88.7   0  9.6 org.videolan.vlc
 2948   957 10076    S     164m 88.7   0 10.7 org.videolan.vlc
Pass 3:
D/vlc     ( 3120): using audio output module "android_audiotrack"
 3120   957 10076    S     163m 88.4   0 25.8 org.videolan.vlc
 3120   957 10076    S     160m 86.8   0 10.7 org.videolan.vlc
 3120   957 10076    S     160m 86.8   0 10.3 org.videolan.vlc
 3120   957 10076    S     160m 86.8   0 10.7 org.videolan.vlc
 3120   957 10076    S     160m 86.8   0 10.2 org.videolan.vlc
 3120   957 10076    S     160m 86.8   0 11.5 org.videolan.vlc

Conclusion
Although there is not much of a significant gain in either audio output, the AudioTrack output feels a bit more stable to the end-user with less glitchiness or stuttering. In addition, AudioTrack supports some formats not supported by amem output (such as mono audio).

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Topics: Mobile | 7 Comments »

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