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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef SERVICES_MEDIA_FRAMEWORK_MOJO_PUSH_PRODUCER_BASE_H_ | |
| 6 #define SERVICES_MEDIA_FRAMEWORK_MOJO_PUSH_PRODUCER_BASE_H_ | |
| 7 | |
| 8 #include "base/single_thread_task_runner.h" | |
| 9 #include "base/synchronization/lock.h" | |
| 10 #include "mojo/common/binding_set.h" | |
| 11 #include "mojo/services/media/common/interfaces/media_transport.mojom.h" | |
| 12 #include "services/media/framework/models/active_sink.h" | |
| 13 #include "services/media/framework_mojo/mojo_allocator.h" | |
| 14 | |
| 15 namespace mojo { | |
| 16 namespace media { | |
| 17 | |
| 18 // Implements MediaProducer to forward a stream across mojo. | |
| 19 class MojoProducer : public MediaProducer, public ActiveSink { | |
| 20 public: | |
| 21 using PrimeConnectionCallback = mojo::Callback<void()>; | |
| 22 using FlushConnectionCallback = mojo::Callback<void()>; | |
| 23 | |
| 24 static std::shared_ptr<MojoProducer> Create() { | |
| 25 return std::shared_ptr<MojoProducer>(new MojoProducer()); | |
| 26 } | |
| 27 | |
| 28 ~MojoProducer() override; | |
| 29 | |
| 30 // Adds a binding. | |
| 31 void AddBinding(InterfaceRequest<MediaProducer> producer); | |
| 32 | |
| 33 // Initiates demand to provide downstream parties with enough content to | |
| 34 // start without starving. | |
| 35 void PrimeConnection(const PrimeConnectionCallback& callback); | |
| 36 | |
| 37 // Unprimes and tells the connected consumer to flush. | |
| 38 void FlushConnection(const FlushConnectionCallback& callback); | |
| 39 | |
| 40 // ActiveSink implementation. | |
| 41 PayloadAllocator* allocator() override; | |
| 42 | |
| 43 void SetDemandCallback(const DemandCallback& demand_callback) override; | |
| 44 | |
| 45 Demand SupplyPacket(PacketPtr packet) override; | |
| 46 | |
| 47 // MediaProducer implementation. | |
| 48 void Connect(InterfaceHandle<MediaConsumer> consumer, | |
| 49 const ConnectCallback& callback) override; | |
| 50 | |
| 51 void Disconnect() override; | |
| 52 | |
| 53 private: | |
| 54 MojoProducer(); | |
| 55 | |
| 56 // Sends a packet to the consumer. | |
| 57 // TODO(dalesat): Don't use a raw pointer, if possible. | |
| 58 void SendPacket(Packet* packet_raw_ptr, MediaPacketPtr media_packet); | |
| 59 | |
| 60 // Creates a MediaPacket from a Packet. | |
| 61 MediaPacketPtr CreateMediaPacket(const PacketPtr& packet); | |
| 62 | |
| 63 // Allocates from the shared buffer. | |
| 64 MojoAllocator mojo_allocator_; | |
| 65 | |
| 66 BindingSet<MediaProducer> bindings_; | |
| 67 MediaConsumerPtr consumer_; | |
| 68 | |
| 69 mutable base::Lock lock_; | |
| 70 // THE FIELDS BELOW SHOULD ONLY BE ACCESSED WITH lock_ TAKEN. | |
| 71 DemandCallback demand_callback_; | |
| 72 scoped_refptr<base::SingleThreadTaskRunner> task_runner_; | |
| 73 // TODO(dalesat): Base this logic on presentation time or duration. | |
| 74 uint32_t max_pushes_outstanding_ = 0; | |
| 75 uint32_t current_pushes_outstanding_ = 0; | |
| 76 // THE FIELDS ABOVE SHOULD ONLY BE ACCESSED WITH lock_ TAKEN. | |
| 77 }; | |
| 78 | |
| 79 } // namespace media | |
| 80 } // namespace mojo | |
| 81 | |
| 82 #endif // SERVICES_MEDIA_FRAMEWORK_MOJO_PUSH_PRODUCER_BASE_H_ | |
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