| 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})" |
