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/*
* Copyright (C) 2011 Ericsson AB. All rights reserved.
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* 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. Neither the name of Ericsson nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* OWNER OR CONTRIBUTORS 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.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_MEDIASTREAM_MEDIA_STREAM_COMPONENT_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_MEDIASTREAM_MEDIA_STREAM_COMPONENT_H_
#include <memory>
#include "third_party/blink/public/platform/modules/mediastream/web_media_stream_track.h"
#include "third_party/blink/public/platform/web_vector.h"
#include "third_party/blink/renderer/platform/audio/audio_source_provider.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "third_party/blink/renderer/platform/mediastream/media_constraints.h"
#include "third_party/blink/renderer/platform/mediastream/media_stream_track_platform.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/threading_primitives.h"
namespace blink {
class MediaStreamSource;
class WebAudioSourceProvider;
// A MediaStreamComponent is a MediaStreamTrack.
// TODO(hta): Consider merging the two classes.
class PLATFORM_EXPORT MediaStreamComponent final
: public GarbageCollected<MediaStreamComponent> {
USING_PRE_FINALIZER(MediaStreamComponent, Dispose);
private:
static int GenerateUniqueId();
public:
MediaStreamComponent(MediaStreamSource*);
MediaStreamComponent(const String& id, MediaStreamSource*);
MediaStreamComponent* Clone() const;
// |m_trackData| may hold pointers to GC objects indirectly, and it may touch
// eagerly finalized objects in destruction.
// So this class runs pre-finalizer to finalize |m_trackData| promptly.
void Dispose();
MediaStreamSource* Source() const { return source_.Get(); }
// This is the same as the id of the |MediaStreamTrack|. It is unique in most
// contexts but collisions can occur e.g. if tracks are created by different
// |RTCPeerConnection|s or a remote track ID is signaled to be added, removed
// and then re-added resulting in a new track object the second time around.
String Id() const { return id_; }
// Uniquely identifies this component.
int UniqueId() const { return unique_id_; }
bool Enabled() const { return enabled_; }
void SetEnabled(bool enabled) { enabled_ = enabled; }
bool Muted() const { return muted_; }
void SetMuted(bool muted) { muted_ = muted; }
WebMediaStreamTrack::ContentHintType ContentHint() { return content_hint_; }
void SetContentHint(WebMediaStreamTrack::ContentHintType);
const MediaConstraints& Constraints() const { return constraints_; }
void SetConstraints(const MediaConstraints& constraints) {
constraints_ = constraints;
}
AudioSourceProvider* GetAudioSourceProvider() { return &source_provider_; }
void SetSourceProvider(WebAudioSourceProvider* provider) {
source_provider_.Wrap(provider);
}
MediaStreamTrackPlatform* GetPlatformTrack() const {
return platform_track_.get();
}
void SetPlatformTrack(
std::unique_ptr<MediaStreamTrackPlatform> platform_track) {
platform_track_ = std::move(platform_track);
}
void GetSettings(MediaStreamTrackPlatform::Settings&);
String ToString() const;
void Trace(Visitor*) const;
private:
// AudioSourceProviderImpl wraps a WebAudioSourceProvider::provideInput()
// calls into chromium to get a rendered audio stream.
class PLATFORM_EXPORT AudioSourceProviderImpl final
: public AudioSourceProvider {
public:
AudioSourceProviderImpl() : web_audio_source_provider_(nullptr) {}
~AudioSourceProviderImpl() override = default;
// Wraps the given blink::WebAudioSourceProvider to
// blink::AudioSourceProvider.
void Wrap(WebAudioSourceProvider*);
// blink::AudioSourceProvider
void ProvideInput(AudioBus*, uint32_t frames_to_process) override;
private:
WebAudioSourceProvider* web_audio_source_provider_;
Mutex provide_input_lock_;
// Used to wrap AudioBus to be passed into |web_audio_source_provider_|.
WebVector<float*> web_audio_data_;
};
AudioSourceProviderImpl source_provider_;
Member<MediaStreamSource> source_;
String id_;
int unique_id_;
bool enabled_ = true;
bool muted_ = false;
WebMediaStreamTrack::ContentHintType content_hint_ =
WebMediaStreamTrack::ContentHintType::kNone;
MediaConstraints constraints_;
std::unique_ptr<MediaStreamTrackPlatform> platform_track_;
};
typedef HeapVector<Member<MediaStreamComponent>> MediaStreamComponentVector;
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_MEDIASTREAM_MEDIA_STREAM_COMPONENT_H_
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