[Chromecast] Correct libcast_governor behavior.

chromecast/media/cma/backend/alsa/slew_volume.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Scale volume with slew rate limiting
 
 #ifndef CHROMECAST_MEDIA_CMA_BACKEND_ALSA_SLEW_VOLUME_H_
 #define CHROMECAST_MEDIA_CMA_BACKEND_ALSA_SLEW_VOLUME_H_
 
 #include <stdint.h>
@@ skipping 19 matching lines @@
 
   // Assumes 1 channel float data that is 16-byte aligned. Smoothly calculates
   // dest[i] += src[i] * volume_scaling
   // ProcessFMAC will be called once for each channel of audio present and
   // |repeat_transition| will be true for channels 2 through n.
   void ProcessFMAC(bool repeat_transition,
                    const float* src,
                    int frames,
                    float* dest);
 
+  // Processes a single channel of float data
+  // dest[i] = src[i] * volume_scaling.
+  // ProcessFMUL will be called once for each channel of audio present.
+  // |repeat_transition| should be true for channels 2 through n.
   // Assumes 2 channels.
-  bool ProcessInterleaved(int32_t* data, int frames);
+  void ProcessFMUL(bool repeat_transition,
+                   const float* src,
+                   int frames,
+                   float* dest);
 
  private:
+  template <typename Traits>
+  void ProcessData(bool repeat_transition,
+                   const float* src,
+                   int frames,
+                   float* dest);
+
   double sample_rate_;
   double volume_scale_ = 1.0;
   double current_volume_ = 1.0;
   double last_starting_volume_ = 1.0;
   double max_slew_time_ms_;
   double max_slew_per_sample_;
   bool interrupted_ = true;
 
   DISALLOW_COPY_AND_ASSIGN(SlewVolume);
 };
 
 }  // namespace media
 }  // namespace chromecast
 
 #endif  // CHROMECAST_MEDIA_CMA_BACKEND_ALSA_SLEW_VOLUME_H_