[Chromecast] Process streams with different post-processing.

chromecast/media/cma/backend/alsa/audio_decoder_alsa.cc

Index: chromecast/media/cma/backend/alsa/audio_decoder_alsa.cc
diff --git a/chromecast/media/cma/backend/alsa/audio_decoder_alsa.cc b/chromecast/media/cma/backend/alsa/audio_decoder_alsa.cc
index a83d6a45a13caf64f0f5db535da7c40304d055c0..aef716a767cfc474b300f3c70872be7fadec80d8 100644
--- a/chromecast/media/cma/backend/alsa/audio_decoder_alsa.cc
+++ b/chromecast/media/cma/backend/alsa/audio_decoder_alsa.cc
@@ -109,7 +109,7 @@ bool AudioDecoderAlsa::Start(int64_t start_pts) {
   current_pts_ = start_pts;
   DCHECK(IsValidConfig(config_));
   mixer_input_.reset(new StreamMixerAlsaInput(
-      this, config_.samples_per_second, backend_->Primary()));
+      this, config_.samples_per_second, backend_->Primary(), backend_->Name()));
   mixer_input_->SetVolumeMultiplier(volume_multiplier_);
   // Create decoder_ if necessary. This can happen if Stop() was called, and
   // SetConfig() was not called since then.
@@ -229,8 +229,9 @@ bool AudioDecoderAlsa::SetConfig(const AudioConfig& config) {
     // Destroy the old input first to ensure that the mixer output sample rate
     // is updated.
     mixer_input_.reset();
-    mixer_input_.reset(new StreamMixerAlsaInput(
-        this, config.samples_per_second, backend_->Primary()));
+    mixer_input_.reset(new StreamMixerAlsaInput(this, config.samples_per_second,
+                                                backend_->Primary(),
+                                                backend_->Name()));
     mixer_input_->SetVolumeMultiplier(volume_multiplier_);
     pending_output_frames_ = kNoPendingOutput;
   }