Adds trunk/talk folder of revision 359 from libjingles google code to

trunk/talk


git-svn-id: http://webrtc.googlecode.com/svn/trunk@4318 4adac7df-926f-26a2-2b94-8c16560cd09d

1 files changed, 193 insertions, 0 deletions

diff --git a/talk/app/webrtc/jsepsessiondescription.cc b/talk/app/webrtc/jsepsessiondescription.cc
new file mode 100644
index 0000000000..bc65ca5a1c
--- /dev/null
+++ b/talk/app/webrtc/jsepsessiondescription.cc
@@ -0,0 +1,193 @@
+/* libjingle
+ * Copyright 2012, Google Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  1. Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *  2. Redistributions in binary form must reproduce the above copyright notice,
+ *     this list of conditions and the following disclaimer in the documentation
+ *     and/or other materials provided with the distribution.
+ *  3. The name of the author may not be used to endorse or promote products
+ *     derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "talk/app/webrtc/jsepsessiondescription.h"
+
+#include "talk/app/webrtc/webrtcsdp.h"
+#include "talk/base/stringencode.h"
+#include "talk/session/media/mediasession.h"
+
+using talk_base::scoped_ptr;
+using cricket::SessionDescription;
+
+namespace webrtc {
+
+static const char* kSupportedTypes[] = {
+    JsepSessionDescription::kOffer,
+    JsepSessionDescription::kPrAnswer,
+    JsepSessionDescription::kAnswer
+};
+
+static bool IsTypeSupported(const std::string& type) {
+  bool type_supported = false;
+  for (size_t i = 0; i < ARRAY_SIZE(kSupportedTypes); ++i) {
+    if (kSupportedTypes[i] == type) {
+      type_supported = true;
+      break;
+    }
+  }
+  return type_supported;
+}
+
+const char SessionDescriptionInterface::kOffer[] = "offer";
+const char SessionDescriptionInterface::kPrAnswer[] = "pranswer";
+const char SessionDescriptionInterface::kAnswer[] = "answer";
+
+const int JsepSessionDescription::kDefaultVideoCodecId = 100;
+const int JsepSessionDescription::kDefaultVideoCodecFramerate = 30;
+const char JsepSessionDescription::kDefaultVideoCodecName[] = "VP8";
+const int JsepSessionDescription::kMaxVideoCodecWidth = 1280;
+const int JsepSessionDescription::kMaxVideoCodecHeight = 720;
+const int JsepSessionDescription::kDefaultVideoCodecPreference = 1;
+
+SessionDescriptionInterface* CreateSessionDescription(const std::string& type,
+                                                      const std::string& sdp) {
+  return CreateSessionDescription(type, sdp, NULL);
+}
+
+SessionDescriptionInterface* CreateSessionDescription(const std::string& type,
+                                                      const std::string& sdp,
+                                                      SdpParseError* error) {
+  if (!IsTypeSupported(type)) {
+    return NULL;
+  }
+
+  JsepSessionDescription* jsep_desc = new JsepSessionDescription(type);
+  if (!jsep_desc->Initialize(sdp, error)) {
+    delete jsep_desc;
+    return NULL;
+  }
+  return jsep_desc;
+}
+
+JsepSessionDescription::JsepSessionDescription(const std::string& type)
+    : type_(type) {
+}
+
+JsepSessionDescription::~JsepSessionDescription() {}
+
+bool JsepSessionDescription::Initialize(
+    cricket::SessionDescription* description,
+    const std::string& session_id,
+    const std::string& session_version) {
+  if (!description)
+    return false;
+
+  session_id_ = session_id;
+  session_version_ = session_version;
+  description_.reset(description);
+  candidate_collection_.resize(number_of_mediasections());
+  return true;
+}
+
+bool JsepSessionDescription::Initialize(const std::string& sdp,
+                                        SdpParseError* error) {
+  return SdpDeserialize(sdp, this, error);
+}
+
+bool JsepSessionDescription::AddCandidate(
+    const IceCandidateInterface* candidate) {
+  if (!candidate || candidate->sdp_mline_index() < 0)
+    return false;
+  size_t mediasection_index = 0;
+  if (!GetMediasectionIndex(candidate, &mediasection_index)) {
+    return false;
+  }
+  if (mediasection_index >= number_of_mediasections())
+    return false;
+  if (candidate_collection_[mediasection_index].HasCandidate(candidate)) {
+    return true;  // Silently ignore this candidate if we already have it.
+  }
+  const std::string content_name =
+      description_->contents()[mediasection_index].name;
+  const cricket::TransportInfo* transport_info =
+      description_->GetTransportInfoByName(content_name);
+  if (!transport_info) {
+    return false;
+  }
+
+  cricket::Candidate updated_candidate = candidate->candidate();
+  if (updated_candidate.username().empty()) {
+    updated_candidate.set_username(transport_info->description.ice_ufrag);
+  }
+  if (updated_candidate.password().empty()) {
+    updated_candidate.set_password(transport_info->description.ice_pwd);
+  }
+
+  candidate_collection_[mediasection_index].add(
+       new JsepIceCandidate(candidate->sdp_mid(),
+                            mediasection_index,
+                            updated_candidate));
+  return true;
+}
+
+size_t JsepSessionDescription::number_of_mediasections() const {
+  if (!description_)
+    return 0;
+  return description_->contents().size();
+}
+
+const IceCandidateCollection* JsepSessionDescription::candidates(
+    size_t mediasection_index) const {
+  if (mediasection_index >= candidate_collection_.size())
+    return NULL;
+  return &candidate_collection_[mediasection_index];
+}
+
+bool JsepSessionDescription::ToString(std::string* out) const {
+  if (!description_ || !out)
+    return false;
+  *out = SdpSerialize(*this);
+  return !out->empty();
+}
+
+bool JsepSessionDescription::GetMediasectionIndex(
+    const IceCandidateInterface* candidate,
+    size_t* index) {
+  if (!candidate || !index) {
+    return false;
+  }
+  *index = static_cast<size_t>(candidate->sdp_mline_index());
+  if (description_ && !candidate->sdp_mid().empty()) {
+    bool found = false;
+    // Try to match the sdp_mid with content name.
+    for (size_t i = 0; i < description_->contents().size(); ++i) {
+      if (candidate->sdp_mid() == description_->contents().at(i).name) {
+        *index = i;
+        found = true;
+        break;
+      }
+    }
+    if (!found) {
+      // If the sdp_mid is presented but we can't find a match, we consider
+      // this as an error.
+      return false;
+    }
+  }
+  return true;
+}
+
+}  // namespace webrtc