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Side by Side Diff: media/audio/audio_file_writer.h

Issue 2582703003: Audio output debug recording. (Closed)
Patch Set: Code review (pfeldman@/dalecurtis@) and a fix. Rebase. Created 3 years, 10 months ago
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1 // Copyright 2015 The Chromium Authors. All rights reserved. 1 // Copyright 2015 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_AUDIO_AUDIO_FILE_WRITER_H_ 5 #ifndef MEDIA_AUDIO_AUDIO_FILE_WRITER_H_
6 #define MEDIA_AUDIO_AUDIO_FILE_WRITER_H_ 6 #define MEDIA_AUDIO_AUDIO_FILE_WRITER_H_
7 7
8 #include <memory> 8 #include <memory>
9 9
10 namespace base { 10 #include "base/callback_forward.h"
11 class FilePath; 11 #include "base/files/file_path.h"
12 }
13 12
14 namespace media { 13 namespace media {
15 14
16 class AudioBus; 15 class AudioBus;
16 class AudioParameters;
17 17
18 // A writer interface used for writing audio data to file for debugging 18 // A writer interface used for writing audio data to file for debugging
19 // purposes. 19 // purposes.
20 class AudioFileWriter { 20 class AudioFileWriter {
21 public: 21 public:
22 // Used for creating an AudioFileWriter.
23 using CreateCallback =
24 base::RepeatingCallback<std::unique_ptr<AudioFileWriter>(
25 const AudioParameters&)>;
26
22 virtual ~AudioFileWriter() {} 27 virtual ~AudioFileWriter() {}
23 28
24 // Must be called before calling Write() for the first time after creation or 29 // Must be called before calling Write() for the first time after creation or
25 // Stop() call. Can be called on any sequence; Write() and Stop() must be 30 // Stop() call. Can be called on any sequence; Write() and Stop() must be
26 // called on the same sequence as Start(). 31 // called on the same sequence as Start().
27 virtual void Start(const base::FilePath& file) = 0; 32 virtual void Start(const base::FilePath& file) = 0;
28 33
29 // Must be called to finish recording. Each call to Start() requires a call to 34 // Must be called to finish recording. Each call to Start() requires a call to
30 // Stop(). Will be automatically called on destruction. 35 // Stop(). Will be automatically called on destruction.
31 virtual void Stop() = 0; 36 virtual void Stop() = 0;
32 37
33 // Write |data| to file. 38 // Write |data| to file.
34 virtual void Write(std::unique_ptr<AudioBus> data) = 0; 39 virtual void Write(std::unique_ptr<AudioBus> data) = 0;
35 40
36 // Returns true if Write() call scheduled at this point will most likely write 41 // Returns true if Write() call scheduled at this point will most likely write
37 // data to the file, and false if it most likely will be a no-op. The result 42 // data to the file, and false if it most likely will be a no-op. The result
38 // may be ambigulous if Start() or Stop() is executed at the moment. Can be 43 // may be ambigulous if Start() or Stop() is executed at the moment. Can be
39 // called from any sequence. 44 // called from any sequence.
40 virtual bool WillWrite() = 0; 45 virtual bool WillWrite() = 0;
46
47 // Gets the extension for the file type the as a string, for example "wav".
48 // Can be called before calling Start() to add the appropriate extension to
49 // the filename.
50 virtual const base::FilePath::CharType* GetFileNameExtension() = 0;
41 }; 51 };
42 52
43 } // namespace media 53 } // namspace media
44 54
45 #endif // MEDIA_AUDIO_AUDIO_FILE_WRITER_H_ 55 #endif // MEDIA_AUDIO_AUDIO_FILE_WRITER_H_
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