1 files changed, 260 insertions, 0 deletions
diff --git a/chromium/third_party/webrtc/modules/audio_coding/neteq/decoder_database.cc b/chromium/third_party/webrtc/modules/audio_coding/neteq/decoder_database.cc
new file mode 100644
index 00000000000..5049962b45b
--- /dev/null
+++ b/chromium/third_party/webrtc/modules/audio_coding/neteq/decoder_database.cc
@@ -0,0 +1,260 @@
+/*
+ *  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/modules/audio_coding/neteq/decoder_database.h"
+
+#include <assert.h>
+#include <utility>  // pair
+
+#include "webrtc/modules/audio_coding/neteq/interface/audio_decoder.h"
+
+namespace webrtc {
+
+DecoderDatabase::DecoderDatabase()
+    : active_decoder_(-1), active_cng_decoder_(-1) {}
+
+DecoderDatabase::~DecoderDatabase() {}
+
+DecoderDatabase::DecoderInfo::~DecoderInfo() {
+  if (!external) delete decoder;
+}
+
+bool DecoderDatabase::Empty() const { return decoders_.empty(); }
+
+int DecoderDatabase::Size() const { return static_cast<int>(decoders_.size()); }
+
+void DecoderDatabase::Reset() {
+  decoders_.clear();
+  active_decoder_ = -1;
+  active_cng_decoder_ = -1;
+}
+
+int DecoderDatabase::RegisterPayload(uint8_t rtp_payload_type,
+                                     NetEqDecoder codec_type) {
+  if (rtp_payload_type > kMaxRtpPayloadType) {
+    return kInvalidRtpPayloadType;
+  }
+  if (!AudioDecoder::CodecSupported(codec_type)) {
+    return kCodecNotSupported;
+  }
+  int fs_hz = AudioDecoder::CodecSampleRateHz(codec_type);
+  std::pair<DecoderMap::iterator, bool> ret;
+  DecoderInfo info(codec_type, fs_hz, NULL, false);
+  ret = decoders_.insert(std::make_pair(rtp_payload_type, info));
+  if (ret.second == false) {
+    // Database already contains a decoder with type |rtp_payload_type|.
+    return kDecoderExists;
+  }
+  return kOK;
+}
+
+int DecoderDatabase::InsertExternal(uint8_t rtp_payload_type,
+                                    NetEqDecoder codec_type,
+                                    int fs_hz,
+                                    AudioDecoder* decoder) {
+  if (rtp_payload_type > 0x7F) {
+    return kInvalidRtpPayloadType;
+  }
+  if (!AudioDecoder::CodecSupported(codec_type)) {
+    return kCodecNotSupported;
+  }
+  if (fs_hz != 8000 && fs_hz != 16000 && fs_hz != 32000 && fs_hz != 48000) {
+    return kInvalidSampleRate;
+  }
+  if (!decoder) {
+    return kInvalidPointer;
+  }
+  decoder->Init();
+  std::pair<DecoderMap::iterator, bool> ret;
+  DecoderInfo info(codec_type, fs_hz, decoder, true);
+  ret = decoders_.insert(
+      std::pair<uint8_t, DecoderInfo>(rtp_payload_type, info));
+  if (ret.second == false) {
+    // Database already contains a decoder with type |rtp_payload_type|.
+    return kDecoderExists;
+  }
+  return kOK;
+}
+
+int DecoderDatabase::Remove(uint8_t rtp_payload_type) {
+  if (decoders_.erase(rtp_payload_type) == 0) {
+    // No decoder with that |rtp_payload_type|.
+    return kDecoderNotFound;
+  }
+  if (active_decoder_ == rtp_payload_type) {
+    active_decoder_ = -1;  // No active decoder.
+  }
+  if (active_cng_decoder_ == rtp_payload_type) {
+    active_cng_decoder_ = -1;  // No active CNG decoder.
+  }
+  return kOK;
+}
+
+const DecoderDatabase::DecoderInfo* DecoderDatabase::GetDecoderInfo(
+    uint8_t rtp_payload_type) const {
+  DecoderMap::const_iterator it = decoders_.find(rtp_payload_type);
+  if (it == decoders_.end()) {
+    // Decoder not found.
+    return NULL;
+  }
+  return &(*it).second;
+}
+
+uint8_t DecoderDatabase::GetRtpPayloadType(
+    NetEqDecoder codec_type) const {
+  DecoderMap::const_iterator it;
+  for (it = decoders_.begin(); it != decoders_.end(); ++it) {
+    if ((*it).second.codec_type == codec_type) {
+      // Match found.
+      return (*it).first;
+    }
+  }
+  // No match.
+  return kRtpPayloadTypeError;
+}
+
+AudioDecoder* DecoderDatabase::GetDecoder(uint8_t rtp_payload_type) {
+  if (IsDtmf(rtp_payload_type) || IsRed(rtp_payload_type)) {
+    // These are not real decoders.
+    return NULL;
+  }
+  DecoderMap::iterator it = decoders_.find(rtp_payload_type);
+  if (it == decoders_.end()) {
+    // Decoder not found.
+    return NULL;
+  }
+  DecoderInfo* info = &(*it).second;
+  if (!info->decoder) {
+    // Create the decoder object.
+    AudioDecoder* decoder = AudioDecoder::CreateAudioDecoder(info->codec_type);
+    assert(decoder);  // Should not be able to have an unsupported codec here.
+    info->decoder = decoder;
+    info->decoder->Init();
+  }
+  return info->decoder;
+}
+
+bool DecoderDatabase::IsType(uint8_t rtp_payload_type,
+                             NetEqDecoder codec_type) const {
+  DecoderMap::const_iterator it = decoders_.find(rtp_payload_type);
+  if (it == decoders_.end()) {
+    // Decoder not found.
+    return false;
+  }
+  return ((*it).second.codec_type == codec_type);
+}
+
+bool DecoderDatabase::IsComfortNoise(uint8_t rtp_payload_type) const {
+  if (IsType(rtp_payload_type, kDecoderCNGnb) ||
+      IsType(rtp_payload_type, kDecoderCNGwb) ||
+      IsType(rtp_payload_type, kDecoderCNGswb32kHz) ||
+      IsType(rtp_payload_type, kDecoderCNGswb48kHz)) {
+    return true;
+  } else {
+    return false;
+  }
+}
+
+bool DecoderDatabase::IsDtmf(uint8_t rtp_payload_type) const {
+  return IsType(rtp_payload_type, kDecoderAVT);
+}
+
+bool DecoderDatabase::IsRed(uint8_t rtp_payload_type) const {
+  return IsType(rtp_payload_type, kDecoderRED);
+}
+
+int DecoderDatabase::SetActiveDecoder(uint8_t rtp_payload_type,
+                                      bool* new_decoder) {
+  // Check that |rtp_payload_type| exists in the database.
+  DecoderMap::const_iterator it = decoders_.find(rtp_payload_type);
+  if (it == decoders_.end()) {
+    // Decoder not found.
+    return kDecoderNotFound;
+  }
+  assert(new_decoder);
+  *new_decoder = false;
+  if (active_decoder_ < 0) {
+    // This is the first active decoder.
+    *new_decoder = true;
+  } else if (active_decoder_ != rtp_payload_type) {
+    // Moving from one active decoder to another. Delete the first one.
+    DecoderMap::iterator it = decoders_.find(active_decoder_);
+    if (it == decoders_.end()) {
+      // Decoder not found. This should not be possible.
+      assert(false);
+      return kDecoderNotFound;
+    }
+    if (!(*it).second.external) {
+      // Delete the AudioDecoder object, unless it is an externally created
+      // decoder.
+      delete (*it).second.decoder;
+      (*it).second.decoder = NULL;
+    }
+    *new_decoder = true;
+  }
+  active_decoder_ = rtp_payload_type;
+  return kOK;
+}
+
+AudioDecoder* DecoderDatabase::GetActiveDecoder() {
+  if (active_decoder_ < 0) {
+    // No active decoder.
+    return NULL;
+  }
+  return GetDecoder(active_decoder_);
+}
+
+int DecoderDatabase::SetActiveCngDecoder(uint8_t rtp_payload_type) {
+  // Check that |rtp_payload_type| exists in the database.
+  DecoderMap::const_iterator it = decoders_.find(rtp_payload_type);
+  if (it == decoders_.end()) {
+    // Decoder not found.
+    return kDecoderNotFound;
+  }
+  if (active_cng_decoder_ >= 0 && active_cng_decoder_ != rtp_payload_type) {
+    // Moving from one active CNG decoder to another. Delete the first one.
+    DecoderMap::iterator it = decoders_.find(active_cng_decoder_);
+    if (it == decoders_.end()) {
+      // Decoder not found. This should not be possible.
+      assert(false);
+      return kDecoderNotFound;
+    }
+    if (!(*it).second.external) {
+      // Delete the AudioDecoder object, unless it is an externally created
+      // decoder.
+      delete (*it).second.decoder;
+      (*it).second.decoder = NULL;
+    }
+  }
+  active_cng_decoder_ = rtp_payload_type;
+  return kOK;
+}
+
+AudioDecoder* DecoderDatabase::GetActiveCngDecoder() {
+  if (active_cng_decoder_ < 0) {
+    // No active CNG decoder.
+    return NULL;
+  }
+  return GetDecoder(active_cng_decoder_);
+}
+
+int DecoderDatabase::CheckPayloadTypes(const PacketList& packet_list) const {
+  PacketList::const_iterator it;
+  for (it = packet_list.begin(); it != packet_list.end(); ++it) {
+    if (decoders_.find((*it)->header.payloadType) == decoders_.end()) {
+      // Payload type is not found.
+      return kDecoderNotFound;
+    }
+  }
+  return kOK;
+}
+
+
+}  // namespace webrtc