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1 // Copyright (c) 2012 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_FILTERS_AUDIO_DECODER_SELECTOR_H_ | |
6 #define MEDIA_FILTERS_AUDIO_DECODER_SELECTOR_H_ | |
7 | |
8 #include <list> | |
9 | |
10 #include "base/callback.h" | |
11 #include "base/memory/ref_counted.h" | |
12 #include "base/memory/weak_ptr.h" | |
13 #include "media/base/audio_decoder.h" | |
14 #include "media/base/decryptor.h" | |
15 #include "media/base/demuxer_stream.h" | |
16 | |
17 namespace base { | |
18 class MessageLoopProxy; | |
19 } | |
20 | |
21 namespace media { | |
22 | |
23 class DecoderBuffer; | |
24 class DecryptingDemuxerStream; | |
25 class Decryptor; | |
26 | |
27 // AudioDecoderSelector (creates if necessary and) initializes the proper | |
28 // AudioDecoder for a given DemuxerStream. If the given DemuxerStream is | |
29 // encrypted, a DecryptingDemuxerStream may also be created. | |
30 class MEDIA_EXPORT AudioDecoderSelector { | |
31 public: | |
32 typedef std::list<scoped_refptr<AudioDecoder> > AudioDecoderList; | |
33 | |
34 // Indicates completion of AudioDecoder selection. | |
35 // - First parameter: The initialized AudioDecoder. If it's set to NULL, then | |
36 // AudioDecoder initialization failed. | |
37 // - Second parameter: The initialized DecryptingDemuxerStream. If it's not | |
38 // NULL, then a DecryptingDemuxerStream is created and initialized to do | |
39 // decryption for the initialized AudioDecoder. | |
ddorwin
2012/12/13 05:08:25
What should a caller do with the DDS?
xhwang
2012/12/13 11:24:36
Done.
| |
40 typedef base::Callback< | |
41 void(const scoped_refptr<AudioDecoder>&, | |
42 const scoped_refptr<DecryptingDemuxerStream>&)> SelectDecoderCB; | |
43 | |
44 // If |set_decryptor_ready_cb| is null, no decryptor will be available | |
45 // to perform decryption. This could happen if --enable-encrypted-media | |
46 // is not set. | |
47 AudioDecoderSelector( | |
48 const scoped_refptr<base::MessageLoopProxy>& message_loop, | |
49 const AudioDecoderList& clear_decoders, | |
50 const SetDecryptorReadyCB& set_decryptor_ready_cb); | |
51 ~AudioDecoderSelector(); | |
52 | |
53 void SelectAudioDecoder(const scoped_refptr<DemuxerStream>& stream, | |
54 const StatisticsCB& statistics_cb, | |
55 const SelectDecoderCB& select_decoder_cb); | |
56 | |
57 private: | |
58 void DecryptingAudioDecoderInitDone(PipelineStatus status); | |
59 void DecryptingDemuxerStreamInitDone(PipelineStatus status); | |
60 void InitializeNextClearDecoder(); | |
61 void ClearDecoderInitDone(PipelineStatus status); | |
62 | |
63 scoped_refptr<base::MessageLoopProxy> message_loop_; | |
64 AudioDecoderList clear_decoders_; | |
65 SetDecryptorReadyCB set_decryptor_ready_cb_; | |
66 | |
67 scoped_refptr<DemuxerStream> input_stream_; | |
68 StatisticsCB statistics_cb_; | |
69 SelectDecoderCB select_decoder_cb_; | |
70 | |
71 scoped_refptr<AudioDecoder> audio_decoder_; | |
72 scoped_refptr<DecryptingDemuxerStream> decrypted_stream_; | |
73 | |
74 base::WeakPtrFactory<AudioDecoderSelector> weak_ptr_factory_; | |
75 base::WeakPtr<AudioDecoderSelector> weak_this_; | |
76 | |
77 DISALLOW_COPY_AND_ASSIGN(AudioDecoderSelector); | |
78 }; | |
79 | |
80 } // namespace media | |
81 | |
82 #endif // MEDIA_FILTERS_AUDIO_DECODER_SELECTOR_H_ | |
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