Move AudioDecoderPcm16B next to AudioEncoderPcm16B

webrtc/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.cc

Index: webrtc/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.cc
diff --git a/webrtc/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.cc b/webrtc/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e3074dfd6dfaa37a90bc5af0a343103ec5ec456a
--- /dev/null
+++ b/webrtc/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.cc
@@ -0,0 +1,54 @@
+/*
+ *  Copyright (c) 2015 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/codecs/pcm16b/include/audio_decoder_pcm16b.h"
+
+#include "webrtc/base/checks.h"
+#include "webrtc/modules/audio_coding/codecs/pcm16b/include/pcm16b.h"
+
+namespace webrtc {
+
+AudioDecoderPcm16B::AudioDecoderPcm16B() {}
+
+void AudioDecoderPcm16B::Reset() {}
+
+size_t AudioDecoderPcm16B::Channels() const {
+  return 1;
+}
+
+int AudioDecoderPcm16B::DecodeInternal(const uint8_t* encoded,
+                                       size_t encoded_len,
+                                       int sample_rate_hz,
+                                       int16_t* decoded,
+                                       SpeechType* speech_type) {
+  DCHECK(sample_rate_hz == 8000 || sample_rate_hz == 16000 ||
+         sample_rate_hz == 32000 || sample_rate_hz == 48000)
+      << "Unsupported sample rate " << sample_rate_hz;
+  size_t ret = WebRtcPcm16b_Decode(encoded, encoded_len, decoded);
+  *speech_type = ConvertSpeechType(1);
+  return static_cast<int>(ret);
+}
+
+int AudioDecoderPcm16B::PacketDuration(const uint8_t* encoded,
+                                       size_t encoded_len) const {
+  // Two encoded byte per sample per channel.
+  return static_cast<int>(encoded_len / (2 * Channels()));
+}
+
+AudioDecoderPcm16BMultiCh::AudioDecoderPcm16BMultiCh(size_t num_channels)
+    : channels_(num_channels) {
+  DCHECK(num_channels > 0);
+}
+
+size_t AudioDecoderPcm16BMultiCh::Channels() const {
+  return channels_;
+}
+
+}  // namespace webrtc