[PATCH] echo-cancel: add api support for webrtc echo suppression

[hng.jms@xxxxxxxxx (James Huang)]

---
 src/modules/echo-cancel/webrtc.cc | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/modules/echo-cancel/webrtc.cc b/src/modules/echo-cancel/webrtc.cc
index aadb1af2..107d2301 100644
--- a/src/modules/echo-cancel/webrtc.cc
+++ b/src/modules/echo-cancel/webrtc.cc
@@ -55,6 +55,7 @@ PA_C_DECL_END
 #define DEFAULT_AGC_START_VOLUME 85
 #define DEFAULT_BEAMFORMING false
 #define DEFAULT_TRACE false
+#define DEFAULT_ECHO_SUPPRESSION_LEVEL 0
 
 #define WEBRTC_AGC_MAX_VOLUME 255
 
@@ -76,6 +77,7 @@ static const char* const valid_modargs[] = {
     "mic_geometry", /* documented in parse_mic_geometry() */
     "target_direction", /* documented in parse_mic_geometry() */
     "trace",
+    "echo_suppression_level",
     NULL
 };
 
@@ -240,7 +242,7 @@ bool pa_webrtc_ec_init(pa_core *c, pa_echo_canceller *ec,
     webrtc::Config config;
     bool hpf, ns, agc, dgc, mobile, cn, vad, ext_filter, intelligibility, experimental_agc, beamforming;
     int rm = -1, i;
-    uint32_t agc_start_volume;
+    uint32_t agc_start_volume, echo_suppression_level;
     pa_modargs *ma;
     bool trace = false;
 
@@ -290,6 +292,12 @@ bool pa_webrtc_ec_init(pa_core *c, pa_echo_canceller *ec,
         goto fail;
     }
 
+    echo_suppression_level = DEFAULT_ECHO_SUPPRESSION_LEVEL;
+    if (pa_modargs_get_value_u32(ma, "echo_suppression_level", &echo_suppression_level) < 0) {
+        pa_log("Failed to parse echo_suppression_level value");
+        goto fail;
+    }
+
     if (mobile) {
         if (ec->params.drift_compensation) {
             pa_log("Can't use drift_compensation in mobile mode");
@@ -439,6 +447,7 @@ bool pa_webrtc_ec_init(pa_core *c, pa_echo_canceller *ec,
     if (hpf)
         apm->high_pass_filter()->Enable(true);
 
+    apm->echo_cancellation()->set_suppression_level((webrtc::EchoCancellation::SuppressionLevel) echo_suppression_level);
     if (!mobile) {
         apm->echo_cancellation()->enable_drift_compensation(ec->params.drift_compensation);
         apm->echo_cancellation()->Enable(true);
-- 
2.11.0 (Apple Git-81)