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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef MEDIA_BASE_FILTER_COLLECTION_H_ | 5 #ifndef MEDIA_BASE_FILTER_COLLECTION_H_ |
6 #define MEDIA_BASE_FILTER_COLLECTION_H_ | 6 #define MEDIA_BASE_FILTER_COLLECTION_H_ |
7 | 7 |
8 #include <list> | 8 #include <list> |
9 | 9 |
10 #include "base/ref_counted.h" | 10 #include "base/ref_counted.h" |
11 #include "media/base/filters.h" | 11 #include "media/base/filters.h" |
12 #include "media/base/filter_factories.h" | 12 #include "media/base/filter_factories.h" |
13 | 13 |
14 namespace media { | 14 namespace media { |
15 | 15 |
16 // This is a collection of Filter objects used to form a media playback | 16 // This is a collection of Filter objects used to form a media playback |
17 // pipeline. See src/media/base/pipeline.h for more information. | 17 // pipeline. See src/media/base/pipeline.h for more information. |
18 class FilterCollection { | 18 class FilterCollection { |
19 public: | 19 public: |
20 FilterCollection(); | 20 FilterCollection(); |
21 ~FilterCollection(); | 21 ~FilterCollection(); |
22 | 22 |
23 // DataSourceFactory accessor methods. | 23 // DemuxerFactory accessor methods. |
24 // FilterCollection takes ownership of the factory here. | 24 // FilterCollection takes ownership of the factory here. |
25 void SetDataSourceFactory(DataSourceFactory* factory); | 25 void SetDemuxerFactory(DemuxerFactory* factory); |
26 DataSourceFactory* GetDataSourceFactory(); | 26 DemuxerFactory* GetDemuxerFactory(); |
27 | 27 |
28 // Adds a filter to the collection. | 28 // Adds a filter to the collection. |
29 void AddDemuxer(Demuxer* filter); | |
30 void AddVideoDecoder(VideoDecoder* filter); | 29 void AddVideoDecoder(VideoDecoder* filter); |
31 void AddAudioDecoder(AudioDecoder* filter); | 30 void AddAudioDecoder(AudioDecoder* filter); |
32 void AddVideoRenderer(VideoRenderer* filter); | 31 void AddVideoRenderer(VideoRenderer* filter); |
33 void AddAudioRenderer(AudioRenderer* filter); | 32 void AddAudioRenderer(AudioRenderer* filter); |
34 | 33 |
35 // Is the collection empty? | 34 // Is the collection empty? |
36 bool IsEmpty() const; | 35 bool IsEmpty() const; |
37 | 36 |
38 // Remove remaining filters. | 37 // Remove remaining filters. |
39 void Clear(); | 38 void Clear(); |
40 | 39 |
41 // Selects a filter of the specified type from the collection. | 40 // Selects a filter of the specified type from the collection. |
42 // If the required filter cannot be found, NULL is returned. | 41 // If the required filter cannot be found, NULL is returned. |
43 // If a filter is returned it is removed from the collection. | 42 // If a filter is returned it is removed from the collection. |
44 void SelectDemuxer(scoped_refptr<Demuxer>* filter_out); | |
45 void SelectVideoDecoder(scoped_refptr<VideoDecoder>* filter_out); | 43 void SelectVideoDecoder(scoped_refptr<VideoDecoder>* filter_out); |
46 void SelectAudioDecoder(scoped_refptr<AudioDecoder>* filter_out); | 44 void SelectAudioDecoder(scoped_refptr<AudioDecoder>* filter_out); |
47 void SelectVideoRenderer(scoped_refptr<VideoRenderer>* filter_out); | 45 void SelectVideoRenderer(scoped_refptr<VideoRenderer>* filter_out); |
48 void SelectAudioRenderer(scoped_refptr<AudioRenderer>* filter_out); | 46 void SelectAudioRenderer(scoped_refptr<AudioRenderer>* filter_out); |
49 | 47 |
50 private: | 48 private: |
51 // Identifies the type of filter implementation. Each filter has to be one of | 49 // Identifies the type of filter implementation. Each filter has to be one of |
52 // the following types. This is used to mark, identify, and support | 50 // the following types. This is used to mark, identify, and support |
53 // downcasting of different filter types stored in the filters_ list. | 51 // downcasting of different filter types stored in the filters_ list. |
54 enum FilterType { | 52 enum FilterType { |
55 DEMUXER, | |
56 AUDIO_DECODER, | 53 AUDIO_DECODER, |
57 VIDEO_DECODER, | 54 VIDEO_DECODER, |
58 AUDIO_RENDERER, | 55 AUDIO_RENDERER, |
59 VIDEO_RENDERER, | 56 VIDEO_RENDERER, |
60 }; | 57 }; |
61 | 58 |
62 // List of filters managed by this collection. | 59 // List of filters managed by this collection. |
63 typedef std::pair<FilterType, scoped_refptr<Filter> > FilterListElement; | 60 typedef std::pair<FilterType, scoped_refptr<Filter> > FilterListElement; |
64 typedef std::list<FilterListElement> FilterList; | 61 typedef std::list<FilterListElement> FilterList; |
65 FilterList filters_; | 62 FilterList filters_; |
66 scoped_ptr<DataSourceFactory> data_source_factory_; | 63 scoped_ptr<DemuxerFactory> demuxer_factory_; |
67 | 64 |
68 // Helper function that adds a filter to the filter list. | 65 // Helper function that adds a filter to the filter list. |
69 void AddFilter(FilterType filter_type, Filter* filter); | 66 void AddFilter(FilterType filter_type, Filter* filter); |
70 | 67 |
71 // Helper function for SelectXXX() methods. It manages the | 68 // Helper function for SelectXXX() methods. It manages the |
72 // downcasting and mapping between FilterType and Filter class. | 69 // downcasting and mapping between FilterType and Filter class. |
73 template<FilterType filter_type, typename F> | 70 template<FilterType filter_type, typename F> |
74 void SelectFilter(scoped_refptr<F>* filter_out); | 71 void SelectFilter(scoped_refptr<F>* filter_out); |
75 | 72 |
76 // Helper function that searches the filters list for a specific filter type. | 73 // Helper function that searches the filters list for a specific filter type. |
77 void SelectFilter(FilterType filter_type, scoped_refptr<Filter>* filter_out); | 74 void SelectFilter(FilterType filter_type, scoped_refptr<Filter>* filter_out); |
78 | 75 |
79 DISALLOW_COPY_AND_ASSIGN(FilterCollection); | 76 DISALLOW_COPY_AND_ASSIGN(FilterCollection); |
80 }; | 77 }; |
81 | 78 |
82 } // namespace media | 79 } // namespace media |
83 | 80 |
84 #endif // MEDIA_BASE_FILTER_COLLECTION_H_ | 81 #endif // MEDIA_BASE_FILTER_COLLECTION_H_ |
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