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1 // Copyright 2014 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 MEDIA_MOJO_SERVICES_DEMUXER_STREAM_PROVIDER_SHIM_H_ | |
6 #define MEDIA_MOJO_SERVICES_DEMUXER_STREAM_PROVIDER_SHIM_H_ | |
7 | |
8 #include <stddef.h> | |
9 | |
10 #include "base/callback.h" | |
11 #include "base/macros.h" | |
12 #include "base/memory/weak_ptr.h" | |
13 #include "media/base/demuxer_stream_provider.h" | |
14 #include "media/mojo/services/mojo_demuxer_stream_adapter.h" | |
15 | |
16 namespace media { | |
17 | |
18 // DemuxerStreamProvider shim for mojom::DemuxerStreams. | |
19 class DemuxerStreamProviderShim : public DemuxerStreamProvider { | |
20 public: | |
21 // Constructs the shim; at least a single audio or video stream must be | |
22 // provided. |demuxer_ready_cb| will be called once the streams have been | |
23 // initialized. Calling any method before then is an error. | |
24 DemuxerStreamProviderShim(std::vector<mojom::DemuxerStreamPtr> streams, | |
25 const base::Closure& demuxer_ready_cb); | |
26 ~DemuxerStreamProviderShim() override; | |
27 | |
28 // DemuxerStreamProvider interface. | |
29 DemuxerStream* GetStream(DemuxerStream::Type type) override; | |
30 | |
31 private: | |
32 // Called as each mojom::DemuxerStream becomes ready. Once all streams | |
33 // are ready it will fire the |demuxer_ready_cb_| provided during | |
34 // construction. | |
35 void OnStreamReady(); | |
36 | |
37 // Stored copy the ready callback provided during construction; cleared once | |
38 // all streams are ready. | |
39 base::Closure demuxer_ready_cb_; | |
40 | |
41 // Container for demuxer stream adapters which interface with the mojo level | |
42 // demuxer streams. |streams_ready_| tracks how many streams are ready and is | |
43 // used by OnStreamReady() to know when |demuxer_ready_cb_| should be fired. | |
44 std::vector<std::unique_ptr<MojoDemuxerStreamAdapter>> streams_; | |
45 size_t streams_ready_; | |
46 | |
47 // WeakPtrFactorys must always be the last member variable. | |
48 base::WeakPtrFactory<DemuxerStreamProviderShim> weak_factory_; | |
49 | |
50 DISALLOW_COPY_AND_ASSIGN(DemuxerStreamProviderShim); | |
51 }; | |
52 | |
53 } // namespace media | |
54 | |
55 #endif // MEDIA_MOJO_SERVICES_DEMUXER_STREAM_PROVIDER_SHIM_H_ | |
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