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echo-cancel: Add the WebRTC echo canceller

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This adds the WebRTC echo canceller as another module-echo-cancel
backend. We're exposing both the full echo canceller as well as the
mobile echo control version as modargs.

Pending items:

1. The mobile canceller doesn't seem to work at the moment.

2. We still need to add bits to hook in drift compensation (to support
   sink and source from different devices).

The most controversial part of this patch would probably be the
mandatory build-time dependency on a C++ compiler. If the optional
--enable-webrtc-aec is set, then there's also a dependency on libstdc++.
This commit is contained in:
Arun Raghavan 2011-09-19 13:41:13 +05:30
parent dbe8f2e595
commit 6df6eb959e
5 changed files with 297 additions and 0 deletions
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15
src/modules/echo-cancel/module-echo-cancel.c
View file

@ -83,6 +83,9 @@ typedef enum {
PA_ECHO_CANCELLER_INVALID = -1,
PA_ECHO_CANCELLER_SPEEX = 0,
PA_ECHO_CANCELLER_ADRIAN,
#ifdef HAVE_WEBRTC
PA_ECHO_CANCELLER_WEBRTC,
#endif
} pa_echo_canceller_method_t;
#define DEFAULT_ECHO_CANCELLER "speex"
@ -100,6 +103,14 @@ static const pa_echo_canceller ec_table[] = {
.run = pa_adrian_ec_run,
.done = pa_adrian_ec_done,
},
#ifdef HAVE_WEBRTC
{
/* WebRTC's audio processing engine */
.init = pa_webrtc_ec_init,
.run = pa_webrtc_ec_run,
.done = pa_webrtc_ec_done,
},
#endif
};
#define DEFAULT_RATE 32000
@ -1340,6 +1351,10 @@ static pa_echo_canceller_method_t get_ec_method_from_string(const char *method)
return PA_ECHO_CANCELLER_SPEEX;
else if (pa_streq(method, "adrian"))
return PA_ECHO_CANCELLER_ADRIAN;
#ifdef HAVE_WEBRTC
else if (pa_streq(method, "webrtc"))
return PA_ECHO_CANCELLER_WEBRTC;
#endif
else
return PA_ECHO_CANCELLER_INVALID;
}