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Side by Side Diff: media/filters/bitstream_converter.h

Issue 7572040: Enable media.dll / libmedia.so. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/
Patch Set: '' Created 9 years, 4 months ago
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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2011 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 // Interface and some concrete classes for applying various transforms 5 // Interface and some concrete classes for applying various transforms
6 // to AVPackets. FFmpegBitstreamConverter, in particular, can be used 6 // to AVPackets. FFmpegBitstreamConverter, in particular, can be used
7 // to apply FFmpeg bitstream filters to the incoming AVPacket to transcode 7 // to apply FFmpeg bitstream filters to the incoming AVPacket to transcode
8 // the packet format. 8 // the packet format.
9 9
10 #ifndef MEDIA_FILTERS_BITSTREAM_CONVERTER_H_ 10 #ifndef MEDIA_FILTERS_BITSTREAM_CONVERTER_H_
11 #define MEDIA_FILTERS_BITSTREAM_CONVERTER_H_ 11 #define MEDIA_FILTERS_BITSTREAM_CONVERTER_H_
12 12
13 #include <string> 13 #include <string>
14 14
15 #include "base/basictypes.h" 15 #include "base/basictypes.h"
16 #include "base/gtest_prod_util.h" 16 #include "base/gtest_prod_util.h"
17 #include "media/base/media_export.h"
17 18
18 // FFmpeg types. 19 // FFmpeg types.
19 struct AVBitStreamFilterContext; 20 struct AVBitStreamFilterContext;
20 struct AVCodecContext; 21 struct AVCodecContext;
21 struct AVPacket; 22 struct AVPacket;
22 23
23 namespace media { 24 namespace media {
24 25
25 class BitstreamConverter { 26 class MEDIA_EXPORT BitstreamConverter {
26 public: 27 public:
27 BitstreamConverter() {} 28 BitstreamConverter() {}
28 virtual ~BitstreamConverter() {} 29 virtual ~BitstreamConverter() {}
29 30
30 // Initialize does any preparations needed before doing the actual 31 // Initialize does any preparations needed before doing the actual
31 // conversion. 32 // conversion.
32 virtual bool Initialize() = 0; 33 virtual bool Initialize() = 0;
33 34
34 // Attemps to convert the AVPacket from one format to another, based on the 35 // Attemps to convert the AVPacket from one format to another, based on the
35 // specific type of BitstreamConverter that was instantiated. Output will be 36 // specific type of BitstreamConverter that was instantiated. Output will be
(...skipping 10 matching lines...) Expand all
46 IdentityBitstreamConverter() {} 47 IdentityBitstreamConverter() {}
47 virtual ~IdentityBitstreamConverter() {} 48 virtual ~IdentityBitstreamConverter() {}
48 49
49 virtual bool Initialize(); 50 virtual bool Initialize();
50 virtual bool ConvertPacket(AVPacket* packet); 51 virtual bool ConvertPacket(AVPacket* packet);
51 52
52 private: 53 private:
53 DISALLOW_COPY_AND_ASSIGN(IdentityBitstreamConverter); 54 DISALLOW_COPY_AND_ASSIGN(IdentityBitstreamConverter);
54 }; 55 };
55 56
56 class FFmpegBitstreamConverter : public BitstreamConverter { 57 class MEDIA_EXPORT FFmpegBitstreamConverter : public BitstreamConverter {
57 public: 58 public:
58 // Creates FFmpegBitstreamConverter based on the FFmpeg bistream filter 59 // Creates FFmpegBitstreamConverter based on the FFmpeg bistream filter
59 // corresponding to |filter_name|. 60 // corresponding to |filter_name|.
60 // 61 //
61 // The |stream_context| will be used during conversion and should be the 62 // The |stream_context| will be used during conversion and should be the
62 // AVCodecContext for the stream sourcing these packets. A reference to 63 // AVCodecContext for the stream sourcing these packets. A reference to
63 // |stream_context| is retained, so it must outlive this class. 64 // |stream_context| is retained, so it must outlive this class.
64 FFmpegBitstreamConverter(const std::string& filter_name, 65 FFmpegBitstreamConverter(const std::string& filter_name,
65 AVCodecContext* stream_context); 66 AVCodecContext* stream_context);
66 virtual ~FFmpegBitstreamConverter(); 67 virtual ~FFmpegBitstreamConverter();
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77 std::string filter_name_; 78 std::string filter_name_;
78 AVBitStreamFilterContext* stream_filter_; 79 AVBitStreamFilterContext* stream_filter_;
79 AVCodecContext* stream_context_; 80 AVCodecContext* stream_context_;
80 81
81 DISALLOW_COPY_AND_ASSIGN(FFmpegBitstreamConverter); 82 DISALLOW_COPY_AND_ASSIGN(FFmpegBitstreamConverter);
82 }; 83 };
83 84
84 } // namespace media 85 } // namespace media
85 86
86 #endif // MEDIA_FILTERS_BITSTREAM_CONVERTER_H_ 87 #endif // MEDIA_FILTERS_BITSTREAM_CONVERTER_H_
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