Revert of - Clean up unused voice engine DTMF code.

webrtc/voice_engine/dtmf_inband_queue.cc

+/*
+ *  Copyright (c) 2012 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/system_wrappers/include/trace.h"
+#include "webrtc/voice_engine/dtmf_inband_queue.h"
+
+namespace webrtc {
+
+DtmfInbandQueue::DtmfInbandQueue(int32_t id):
+    _id(id),
+    _nextEmptyIndex(0)
+{
+    memset(_DtmfKey,0, sizeof(_DtmfKey));
+    memset(_DtmfLen,0, sizeof(_DtmfLen));
+    memset(_DtmfLevel,0, sizeof(_DtmfLevel));
+}
+
+DtmfInbandQueue::~DtmfInbandQueue()
+{
+}
+
+int
+DtmfInbandQueue::AddDtmf(uint8_t key, uint16_t len, uint8_t level)
+{
+    rtc::CritScope lock(&_DtmfCritsect);
+
+    if (_nextEmptyIndex >= kDtmfInbandMax)
+    {
+        WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_id,-1),
+                   "DtmfInbandQueue::AddDtmf() unable to add Dtmf tone");
+        return -1;
+    }
+    int32_t index = _nextEmptyIndex;
+    _DtmfKey[index] = key;
+    _DtmfLen[index] = len;
+    _DtmfLevel[index] = level;
+    _nextEmptyIndex++;
+    return 0;
+}
+
+int8_t
+DtmfInbandQueue::NextDtmf(uint16_t* len, uint8_t* level)
+{
+    rtc::CritScope lock(&_DtmfCritsect);
+
+    if(!PendingDtmf())
+    {
+        return -1;
+    }
+    int8_t nextDtmf = _DtmfKey[0];
+    *len=_DtmfLen[0];
+    *level=_DtmfLevel[0];
+
+    memmove(&(_DtmfKey[0]), &(_DtmfKey[1]),
+            _nextEmptyIndex*sizeof(uint8_t));
+    memmove(&(_DtmfLen[0]), &(_DtmfLen[1]),
+            _nextEmptyIndex*sizeof(uint16_t));
+    memmove(&(_DtmfLevel[0]), &(_DtmfLevel[1]),
+            _nextEmptyIndex*sizeof(uint8_t));
+
+    _nextEmptyIndex--;
+    return nextDtmf;
+}
+
+bool
+DtmfInbandQueue::PendingDtmf()
+{
+    rtc::CritScope lock(&_DtmfCritsect);
+    return _nextEmptyIndex > 0;
+}
+
+void
+DtmfInbandQueue::ResetDtmf()
+{
+    rtc::CritScope lock(&_DtmfCritsect);
+    _nextEmptyIndex = 0;
+}
+
+}  // namespace webrtc