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/*
* Copyright (c) 2011 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/voice_engine/channel_manager.h"
#include "webrtc/common.h"
#include "webrtc/voice_engine/channel.h"
namespace webrtc {
namespace voe {
ChannelOwner::ChannelOwner(class Channel* channel)
: channel_ref_(new ChannelRef(channel)) {}
ChannelOwner::ChannelOwner(const ChannelOwner& channel_owner)
: channel_ref_(channel_owner.channel_ref_) {
++channel_ref_->ref_count;
}
ChannelOwner::~ChannelOwner() {
if (--channel_ref_->ref_count == 0)
delete channel_ref_;
}
ChannelOwner& ChannelOwner::operator=(const ChannelOwner& other) {
if (other.channel_ref_ == channel_ref_)
return *this;
if (--channel_ref_->ref_count == 0)
delete channel_ref_;
channel_ref_ = other.channel_ref_;
++channel_ref_->ref_count;
return *this;
}
ChannelOwner::ChannelRef::ChannelRef(class Channel* channel)
: channel(channel), ref_count(1) {}
ChannelManager::ChannelManager(uint32_t instance_id, const Config& config)
: instance_id_(instance_id),
last_channel_id_(-1),
lock_(CriticalSectionWrapper::CreateCriticalSection()),
config_(config),
event_log_(RtcEventLog::Create()) {}
ChannelOwner ChannelManager::CreateChannel() {
return CreateChannelInternal(config_);
}
ChannelOwner ChannelManager::CreateChannel(const Config& external_config) {
return CreateChannelInternal(external_config);
}
ChannelOwner ChannelManager::CreateChannelInternal(const Config& config) {
Channel* channel;
Channel::CreateChannel(channel, ++last_channel_id_, instance_id_,
event_log_.get(), config);
ChannelOwner channel_owner(channel);
CriticalSectionScoped crit(lock_.get());
channels_.push_back(channel_owner);
return channel_owner;
}
ChannelOwner ChannelManager::GetChannel(int32_t channel_id) {
CriticalSectionScoped crit(lock_.get());
for (size_t i = 0; i < channels_.size(); ++i) {
if (channels_[i].channel()->ChannelId() == channel_id)
return channels_[i];
}
return ChannelOwner(NULL);
}
void ChannelManager::GetAllChannels(std::vector<ChannelOwner>* channels) {
CriticalSectionScoped crit(lock_.get());
*channels = channels_;
}
void ChannelManager::DestroyChannel(int32_t channel_id) {
assert(channel_id >= 0);
// Holds a reference to a channel, this is used so that we never delete
// Channels while holding a lock, but rather when the method returns.
ChannelOwner reference(NULL);
{
CriticalSectionScoped crit(lock_.get());
std::vector<ChannelOwner>::iterator to_delete = channels_.end();
for (auto it = channels_.begin(); it != channels_.end(); ++it) {
Channel* channel = it->channel();
// For channels associated with the channel to be deleted, disassociate
// with that channel.
channel->DisassociateSendChannel(channel_id);
if (channel->ChannelId() == channel_id) {
to_delete = it;
}
}
if (to_delete != channels_.end()) {
reference = *to_delete;
channels_.erase(to_delete);
}
}
}
void ChannelManager::DestroyAllChannels() {
// Holds references so that Channels are not destroyed while holding this
// lock, but rather when the method returns.
std::vector<ChannelOwner> references;
{
CriticalSectionScoped crit(lock_.get());
references = channels_;
channels_.clear();
}
}
size_t ChannelManager::NumOfChannels() const {
CriticalSectionScoped crit(lock_.get());
return channels_.size();
}
RtcEventLog* ChannelManager::GetEventLog() const {
return event_log_.get();
}
ChannelManager::Iterator::Iterator(ChannelManager* channel_manager)
: iterator_pos_(0) {
channel_manager->GetAllChannels(&channels_);
}
Channel* ChannelManager::Iterator::GetChannel() {
if (iterator_pos_ < channels_.size())
return channels_[iterator_pos_].channel();
return NULL;
}
bool ChannelManager::Iterator::IsValid() {
return iterator_pos_ < channels_.size();
}
void ChannelManager::Iterator::Increment() {
++iterator_pos_;
}
} // namespace voe
} // namespace webrtc
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