Open backdoor in VoiceEngineImpl to get at the actual voe::Channel objects from an ID.

webrtc/voice_engine/voice_engine_impl.cc

Index: webrtc/voice_engine/voice_engine_impl.cc
diff --git a/webrtc/voice_engine/voice_engine_impl.cc b/webrtc/voice_engine/voice_engine_impl.cc
index 814d619589e755fd16b515b39519bbf34d29938e..d9c574457b0d21b9adda9b6f5dbf2fabe87d7bc9 100644
--- a/webrtc/voice_engine/voice_engine_impl.cc
+++ b/webrtc/voice_engine/voice_engine_impl.cc
@@ -15,8 +15,11 @@
 #include "webrtc/modules/utility/include/jvm_android.h"
 #endif
 
+#include "webrtc/base/checks.h"
 #include "webrtc/modules/audio_coding/main/include/audio_coding_module.h"
+#include "webrtc/system_wrappers/include/critical_section_wrapper.h"
 #include "webrtc/system_wrappers/include/trace.h"
+#include "webrtc/voice_engine/channel_proxy.h"
 #include "webrtc/voice_engine/voice_engine_impl.h"
 
 namespace webrtc {
@@ -77,6 +80,15 @@ int VoiceEngineImpl::Release() {
   return new_ref;
 }
 
+rtc::scoped_ptr<voe::ChannelProxy> VoiceEngineImpl::GetChannelProxy(
+    int channel_id) {
+  RTC_DCHECK(channel_id >= 0);
+  CriticalSectionScoped cs(crit_sec());
+  RTC_DCHECK(statistics().Initialized());
+  return rtc::scoped_ptr<voe::ChannelProxy>(
+      new voe::ChannelProxy(channel_manager().GetChannel(channel_id)));
+}
+
 VoiceEngine* VoiceEngine::Create() {
   Config* config = new Config();
   return GetVoiceEngine(config, true);