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Side by Side Diff: media/base/audio_block_fifo.h

Issue 510073002: Reland 501823002: Used native deinterleaved and float point format for the input streams (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: uint8 -> float Created 6 years, 3 months ago
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1 // Copyright 2014 The Chromium Authors. All rights reserved. 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 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_AUDIO_BLOCK_FIFO_H_ 5 #ifndef MEDIA_BASE_AUDIO_BLOCK_FIFO_H_
6 #define MEDIA_BASE_AUDIO_BLOCK_FIFO_H_ 6 #define MEDIA_BASE_AUDIO_BLOCK_FIFO_H_
7 7
8 #include "base/memory/scoped_vector.h" 8 #include "base/memory/scoped_vector.h"
9 #include "media/base/audio_bus.h" 9 #include "media/base/audio_bus.h"
10 #include "media/base/media_export.h" 10 #include "media/base/media_export.h"
(...skipping 10 matching lines...) Expand all
21 // Creates a new AudioBlockFifo and allocates |blocks| memory, each block 21 // Creates a new AudioBlockFifo and allocates |blocks| memory, each block
22 // of memory can store |channels| of length |frames| data. 22 // of memory can store |channels| of length |frames| data.
23 AudioBlockFifo(int channels, int frames, int blocks); 23 AudioBlockFifo(int channels, int frames, int blocks);
24 virtual ~AudioBlockFifo(); 24 virtual ~AudioBlockFifo();
25 25
26 // Pushes interleaved audio data from |source| to the FIFO. 26 // Pushes interleaved audio data from |source| to the FIFO.
27 // The method will deinterleave the data into a audio bus. 27 // The method will deinterleave the data into a audio bus.
28 // Push() will crash if the allocated space is insufficient. 28 // Push() will crash if the allocated space is insufficient.
29 void Push(const void* source, int frames, int bytes_per_sample); 29 void Push(const void* source, int frames, int bytes_per_sample);
30 30
31 // Pushes the audio data from |source| to the FIFO.
32 // Push() will crash if the allocated space is insufficient.
33 void Push(const AudioBus* source);
34
31 // Consumes a block of audio from the FIFO. Returns an AudioBus which 35 // Consumes a block of audio from the FIFO. Returns an AudioBus which
32 // contains the consumed audio data to avoid copying. 36 // contains the consumed audio data to avoid copying.
33 // Consume() will crash if the FIFO does not contain a block of data. 37 // Consume() will crash if the FIFO does not contain a block of data.
34 const AudioBus* Consume(); 38 const AudioBus* Consume();
35 39
36 // Empties the FIFO without deallocating any memory. 40 // Empties the FIFO without deallocating any memory.
37 void Clear(); 41 void Clear();
38 42
39 // Number of available block of memory ready to be consumed in the FIFO. 43 // Number of available block of memory ready to be consumed in the FIFO.
40 int available_blocks() const { return available_blocks_; } 44 int available_blocks() const { return available_blocks_; }
41 45
42 // Number of available frames of data in the FIFO. 46 // Number of available frames of data in the FIFO.
43 int GetAvailableFrames() const; 47 int GetAvailableFrames() const;
44 48
45 // Number of unfilled frames in the whole FIFO. 49 // Number of unfilled frames in the whole FIFO.
46 int GetUnfilledFrames() const; 50 int GetUnfilledFrames() const;
47 51
48 private: 52 private:
53 // Helper method to update the indexes in Push methods.
54 void UpdatePosition(int push_frames);
55
49 // The actual FIFO is a vector of audio buses. 56 // The actual FIFO is a vector of audio buses.
50 ScopedVector<AudioBus> audio_blocks_; 57 ScopedVector<AudioBus> audio_blocks_;
51 58
52 // Maximum number of frames of data one block of memory can contain. 59 // Maximum number of frames of data one block of memory can contain.
53 // This value is set by |frames| in the constructor. 60 // This value is set by |frames| in the constructor.
54 const int block_frames_; 61 const int block_frames_;
55 62
56 // Used to keep track which block of memory to be written. 63 // Used to keep track which block of memory to be written.
57 int write_block_; 64 int write_block_;
58 65
59 // Used to keep track which block of memory to be consumed. 66 // Used to keep track which block of memory to be consumed.
60 int read_block_; 67 int read_block_;
61 68
62 // Number of available blocks of memory to be consumed. 69 // Number of available blocks of memory to be consumed.
63 int available_blocks_; 70 int available_blocks_;
64 71
65 // Current write position in the current written block. 72 // Current write position in the current written block.
66 int write_pos_; 73 int write_pos_;
67 74
68 DISALLOW_COPY_AND_ASSIGN(AudioBlockFifo); 75 DISALLOW_COPY_AND_ASSIGN(AudioBlockFifo);
69 }; 76 };
70 77
71 } // namespace media 78 } // namespace media
72 79
73 #endif // MEDIA_BASE_AUDIO_BLOCK_FIFO_H_ 80 #endif // MEDIA_BASE_AUDIO_BLOCK_FIFO_H_
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