WIP: Adding a centralized NetEq Clock

webrtc/modules/audio_coding/neteq/decision_logic_fax.cc

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #include "webrtc/modules/audio_coding/neteq/decision_logic_fax.h"
 
 #include <assert.h>
 
 #include <algorithm>
 
 #include "webrtc/modules/audio_coding/neteq/decoder_database.h"
 #include "webrtc/modules/audio_coding/neteq/sync_buffer.h"
 
 namespace webrtc {
 
 Operations DecisionLogicFax::GetDecisionSpecialized(
     const SyncBuffer& sync_buffer,
     const Expand& expand,
     size_t decoder_frame_length,
     const RTPHeader* packet_header,
     Modes prev_mode,
     bool play_dtmf,
-    bool* reset_decoder) {
+    bool* reset_decoder,
+    size_t noise_samples_played) {
   assert(playout_mode_ == kPlayoutFax || playout_mode_ == kPlayoutOff);
   uint32_t target_timestamp = sync_buffer.end_timestamp();
   uint32_t available_timestamp = 0;
   int is_cng_packet = 0;
   if (packet_header) {
     available_timestamp = packet_header->timestamp;
     is_cng_packet =
         decoder_database_->IsComfortNoise(packet_header->payloadType);
   }
   if (is_cng_packet) {
-    if (static_cast<int32_t>((generated_noise_samples_ + target_timestamp)
+    if (static_cast<int32_t>((noise_samples_played + target_timestamp)
         - available_timestamp) >= 0) {
       // Time to play this packet now.
       return kRfc3389Cng;
     } else {
       // Wait before playing this packet.
       return kRfc3389CngNoPacket;
     }
   }
   if (!packet_header) {
     // No packet. If in CNG mode, play as usual. Otherwise, use other method to
@@ skipping 12 matching lines @@
         case kPlayoutFax:
           return kAudioRepetition;
         default:
           assert(false);
           return kUndefined;
       }
     }
   } else if (target_timestamp == available_timestamp) {
     return kNormal;
   } else {
-    if (static_cast<int32_t>((generated_noise_samples_ + target_timestamp)
+    if (static_cast<int32_t>((noise_samples_played + target_timestamp)
         - available_timestamp) >= 0) {
       return kNormal;
     } else {
       // If currently playing comfort noise, continue with that. Do not
-      // increase the timestamp counter since generated_noise_samples_ will
-      // be increased.
+      // increase the timestamp counter since generated_noise_stopwatch_ in
+      // NetEqImpl will take care of the time-keeping.
       if (cng_state_ == kCngRfc3389On) {
         return kRfc3389CngNoPacket;
       } else if (cng_state_ == kCngInternalOn) {
         return kCodecInternalCng;
       } else {
         // Otherwise, do packet-loss concealment and increase the
         // timestamp while waiting for the time to play this packet.
         switch (playout_mode_) {
           case kPlayoutOff:
             return kAlternativePlcIncreaseTimestamp;
           case kPlayoutFax:
             return kAudioRepetitionIncreaseTimestamp;
           default:
             assert(0);
             return kUndefined;
         }
       }
     }
   }
 }
 
 
 }  // namespace webrtc