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Diffstat (limited to 'media/webrtc/trunk/webrtc/tools/e2e_quality/audio/README')
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diff --git a/media/webrtc/trunk/webrtc/tools/e2e_quality/audio/README b/media/webrtc/trunk/webrtc/tools/e2e_quality/audio/README new file mode 100644 index 000000000..aa8538558 --- /dev/null +++ b/media/webrtc/trunk/webrtc/tools/e2e_quality/audio/README @@ -0,0 +1,27 @@ +The tools here run an end-to-end audio quality test on Linux using PulseAudio. + +INSTALLATION +The test depends on PulseAudio virtual devices (null sinks). Without additional +arguments, run_audio_test.py expects a pair of sinks named "capture" and +"render". To create these devices at machine startup, place the provided +default.pa file in ~/.pulse. Alternately, the "pacmd" commands therein can be +run on the command-line to create the devices. + +Similarly, place the provided daemon.conf file in ~/.pulse to use high quality +resampling in PulseAudio. This will reduce the resampling impact on the outcome +of the test. + +Build all WebRTC targets as usual (or just the audio_e2e_harness target) to +generate the VoiceEngine harness. + +USAGE +Run run_audio_test.py to start. The script has reasonable defaults and will +use the expected location of audio_e2e_harness. Some settings will usually +be provided by the user, particularly the comparison tool command-line and +regular expression to extract the quality metric. + +An example command-line, run from trunk/ + +webrtc/tools/e2e_quality/audio/run_audio_test.py \ +--input=data/voice_engine/audio_short16.pcm --output=e2e_audio_out.pcm \ +--codec=L16 --compare="comparison-tool" --regexp="(\d\.\d{3})" |