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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/renderer/media/peer_connection_handler_base.h"
#include "base/logging.h"
#include "base/utf_string_conversions.h"
#include "content/renderer/media/media_stream_dependency_factory.h"
#include "content/renderer/media/media_stream_extra_data.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebMediaStreamComponent.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebMediaStreamDescriptor.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebMediaStreamSource.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebString.h"
namespace content {
// TODO(hta): Unify implementations of these functions from MediaStreamCenter
static webrtc::LocalMediaStreamInterface* GetLocalNativeMediaStream(
const WebKit::WebMediaStreamDescriptor& stream) {
MediaStreamExtraData* extra_data =
static_cast<MediaStreamExtraData*>(stream.extraData());
if (extra_data)
return extra_data->local_stream();
return NULL;
}
template <class TrackList>
static webrtc::MediaStreamTrackInterface* GetLocalTrack(
const std::string& source_id,
TrackList* tracks) {
// TODO(hta): Look at MediaStreamTrackInterface - lookup by ID belongs below.
for (size_t i = 0; i < tracks->count(); ++i) {
if (tracks->at(i)->label() == source_id)
return tracks->at(i);
}
return NULL;
}
PeerConnectionHandlerBase::PeerConnectionHandlerBase(
MediaStreamDependencyFactory* dependency_factory)
: dependency_factory_(dependency_factory),
message_loop_proxy_(base::MessageLoopProxy::current()) {
}
PeerConnectionHandlerBase::~PeerConnectionHandlerBase() {
}
bool PeerConnectionHandlerBase::AddStream(
const WebKit::WebMediaStreamDescriptor& stream,
const webrtc::MediaConstraintsInterface* constraints) {
webrtc::LocalMediaStreamInterface* native_stream =
GetLocalNativeMediaStream(stream);
if (!native_stream)
return false;
return native_peer_connection_->AddStream(native_stream, constraints);
}
void PeerConnectionHandlerBase::RemoveStream(
const WebKit::WebMediaStreamDescriptor& stream) {
webrtc::LocalMediaStreamInterface* native_stream =
GetLocalNativeMediaStream(stream);
if (native_stream)
native_peer_connection_->RemoveStream(native_stream);
DCHECK(native_stream);
}
WebKit::WebMediaStreamDescriptor
PeerConnectionHandlerBase::CreateWebKitStreamDescriptor(
webrtc::MediaStreamInterface* stream) {
webrtc::AudioTracks* audio_tracks = stream->audio_tracks();
webrtc::VideoTracks* video_tracks = stream->video_tracks();
WebKit::WebVector<WebKit::WebMediaStreamSource> audio_source_vector(
audio_tracks->count());
WebKit::WebVector<WebKit::WebMediaStreamSource> video_source_vector(
video_tracks->count());
// Add audio tracks.
size_t i = 0;
for (; i < audio_tracks->count(); ++i) {
webrtc::AudioTrackInterface* audio_track = audio_tracks->at(i);
DCHECK(audio_track);
audio_source_vector[i].initialize(
UTF8ToUTF16(audio_track->label()),
WebKit::WebMediaStreamSource::TypeAudio,
UTF8ToUTF16(audio_track->label()));
}
// Add video tracks.
for (i = 0; i < video_tracks->count(); ++i) {
webrtc::VideoTrackInterface* video_track = video_tracks->at(i);
DCHECK(video_track);
video_source_vector[i].initialize(
UTF8ToUTF16(video_track->label()),
WebKit::WebMediaStreamSource::TypeVideo,
UTF8ToUTF16(video_track->label()));
}
WebKit::WebMediaStreamDescriptor descriptor;
descriptor.initialize(UTF8ToUTF16(stream->label()),
audio_source_vector, video_source_vector);
descriptor.setExtraData(new MediaStreamExtraData(stream));
return descriptor;
}
webrtc::MediaStreamTrackInterface*
PeerConnectionHandlerBase::GetLocalNativeMediaStreamTrack(
const WebKit::WebMediaStreamDescriptor& stream,
const WebKit::WebMediaStreamComponent& component) {
std::string source_id = UTF16ToUTF8(component.source().id());
webrtc::MediaStreamInterface* native_stream
= GetLocalNativeMediaStream(stream);
if (!native_stream) {
return NULL;
}
if (component.source().type() == WebKit::WebMediaStreamSource::TypeAudio) {
return GetLocalTrack<webrtc::AudioTracks>(
source_id, native_stream->audio_tracks());
}
if (component.source().type() == WebKit::WebMediaStreamSource::TypeVideo) {
return GetLocalTrack<webrtc::VideoTracks>(
source_id, native_stream->video_tracks());
}
NOTIMPLEMENTED(); // We have an unknown type of media stream track.
return NULL;
}
} // namespace content
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