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/*
* 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 <assert.h>
#include "webrtc/common_types.h"
#include "webrtc/modules/rtp_rtcp/source/rtp_header_extension.h"
namespace webrtc {
RtpHeaderExtensionMap::RtpHeaderExtensionMap() {
}
RtpHeaderExtensionMap::~RtpHeaderExtensionMap() {
Erase();
}
void RtpHeaderExtensionMap::Erase() {
while (!extensionMap_.empty()) {
std::map<uint8_t, HeaderExtension*>::iterator it =
extensionMap_.begin();
delete it->second;
extensionMap_.erase(it);
}
}
int32_t RtpHeaderExtensionMap::Register(const RTPExtensionType type,
const uint8_t id) {
if (id < 1 || id > 14) {
return -1;
}
std::map<uint8_t, HeaderExtension*>::iterator it =
extensionMap_.find(id);
if (it != extensionMap_.end()) {
if (it->second->type != type) {
// An extension is already registered with the same id
// but a different type, so return failure.
return -1;
}
// This extension type is already registered with this id,
// so return success.
return 0;
}
extensionMap_[id] = new HeaderExtension(type);
return 0;
}
int32_t RtpHeaderExtensionMap::Deregister(const RTPExtensionType type) {
uint8_t id;
if (GetId(type, &id) != 0) {
return 0;
}
std::map<uint8_t, HeaderExtension*>::iterator it =
extensionMap_.find(id);
assert(it != extensionMap_.end());
delete it->second;
extensionMap_.erase(it);
return 0;
}
bool RtpHeaderExtensionMap::IsRegistered(RTPExtensionType type) const {
std::map<uint8_t, HeaderExtension*>::const_iterator it =
extensionMap_.begin();
for (; it != extensionMap_.end(); ++it) {
if (it->second->type == type)
return true;
}
return false;
}
int32_t RtpHeaderExtensionMap::GetType(const uint8_t id,
RTPExtensionType* type) const {
assert(type);
std::map<uint8_t, HeaderExtension*>::const_iterator it =
extensionMap_.find(id);
if (it == extensionMap_.end()) {
return -1;
}
HeaderExtension* extension = it->second;
*type = extension->type;
return 0;
}
int32_t RtpHeaderExtensionMap::GetId(const RTPExtensionType type,
uint8_t* id) const {
assert(id);
std::map<uint8_t, HeaderExtension*>::const_iterator it =
extensionMap_.begin();
while (it != extensionMap_.end()) {
HeaderExtension* extension = it->second;
if (extension->type == type) {
*id = it->first;
return 0;
}
it++;
}
return -1;
}
size_t RtpHeaderExtensionMap::GetTotalLengthInBytes() const {
// Get length for each extension block.
size_t length = 0;
std::map<uint8_t, HeaderExtension*>::const_iterator it =
extensionMap_.begin();
while (it != extensionMap_.end()) {
HeaderExtension* extension = it->second;
length += extension->length;
it++;
}
// Add RTP extension header length.
if (length > 0) {
length += kRtpOneByteHeaderLength;
}
return length;
}
int32_t RtpHeaderExtensionMap::GetLengthUntilBlockStartInBytes(
const RTPExtensionType type) const {
uint8_t id;
if (GetId(type, &id) != 0) {
// Not registered.
return -1;
}
// Get length until start of extension block type.
uint16_t length = kRtpOneByteHeaderLength;
std::map<uint8_t, HeaderExtension*>::const_iterator it =
extensionMap_.begin();
while (it != extensionMap_.end()) {
HeaderExtension* extension = it->second;
if (extension->type == type) {
break;
} else {
length += extension->length;
}
it++;
}
return length;
}
int32_t RtpHeaderExtensionMap::Size() const {
return extensionMap_.size();
}
RTPExtensionType RtpHeaderExtensionMap::First() const {
std::map<uint8_t, HeaderExtension*>::const_iterator it =
extensionMap_.begin();
if (it == extensionMap_.end()) {
return kRtpExtensionNone;
}
HeaderExtension* extension = it->second;
return extension->type;
}
RTPExtensionType RtpHeaderExtensionMap::Next(RTPExtensionType type) const {
uint8_t id;
if (GetId(type, &id) != 0) {
return kRtpExtensionNone;
}
std::map<uint8_t, HeaderExtension*>::const_iterator it =
extensionMap_.find(id);
if (it == extensionMap_.end()) {
return kRtpExtensionNone;
}
it++;
if (it == extensionMap_.end()) {
return kRtpExtensionNone;
}
HeaderExtension* extension = it->second;
return extension->type;
}
void RtpHeaderExtensionMap::GetCopy(RtpHeaderExtensionMap* map) const {
assert(map);
std::map<uint8_t, HeaderExtension*>::const_iterator it =
extensionMap_.begin();
while (it != extensionMap_.end()) {
HeaderExtension* extension = it->second;
map->Register(extension->type, it->first);
it++;
}
}
} // namespace webrtc
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