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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 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_PARAMETERS_H_ | 5 #ifndef MEDIA_AUDIO_AUDIO_PARAMETERS_H_ |
6 #define MEDIA_AUDIO_AUDIO_PARAMETERS_H_ | 6 #define MEDIA_AUDIO_AUDIO_PARAMETERS_H_ |
7 | 7 |
8 #include "base/basictypes.h" | 8 #include "base/basictypes.h" |
9 #include "base/time/time.h" | 9 #include "base/time/time.h" |
10 #include "media/base/channel_layout.h" | 10 #include "media/base/channel_layout.h" |
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51 ECHO_CANCELLER = 0x1, | 51 ECHO_CANCELLER = 0x1, |
52 DUCKING = 0x2, // Enables ducking if the OS supports it. | 52 DUCKING = 0x2, // Enables ducking if the OS supports it. |
53 KEYBOARD_MIC = 0x4, | 53 KEYBOARD_MIC = 0x4, |
54 }; | 54 }; |
55 | 55 |
56 AudioParameters(); | 56 AudioParameters(); |
57 AudioParameters(Format format, ChannelLayout channel_layout, | 57 AudioParameters(Format format, ChannelLayout channel_layout, |
58 int sample_rate, int bits_per_sample, | 58 int sample_rate, int bits_per_sample, |
59 int frames_per_buffer); | 59 int frames_per_buffer); |
60 AudioParameters(Format format, ChannelLayout channel_layout, | 60 AudioParameters(Format format, ChannelLayout channel_layout, |
61 int input_channels, | |
62 int sample_rate, int bits_per_sample, | 61 int sample_rate, int bits_per_sample, |
63 int frames_per_buffer, int effects); | 62 int frames_per_buffer, int effects); |
64 AudioParameters(Format format, ChannelLayout channel_layout, | 63 AudioParameters(Format format, ChannelLayout channel_layout, |
65 int channels, int input_channels, | 64 int channels, int sample_rate, int bits_per_sample, |
66 int sample_rate, int bits_per_sample, | |
67 int frames_per_buffer, int effects); | 65 int frames_per_buffer, int effects); |
68 | 66 |
69 void Reset(Format format, ChannelLayout channel_layout, | 67 void Reset(Format format, ChannelLayout channel_layout, |
70 int channels, int input_channels, | 68 int channels, int sample_rate, int bits_per_sample, |
71 int sample_rate, int bits_per_sample, | |
72 int frames_per_buffer); | 69 int frames_per_buffer); |
73 | 70 |
74 // Checks that all values are in the expected range. All limits are specified | 71 // Checks that all values are in the expected range. All limits are specified |
75 // in media::Limits. | 72 // in media::Limits. |
76 bool IsValid() const; | 73 bool IsValid() const; |
77 | 74 |
78 // Returns size of audio buffer in bytes. | 75 // Returns size of audio buffer in bytes. |
79 int GetBytesPerBuffer() const; | 76 int GetBytesPerBuffer() const; |
80 | 77 |
81 // Returns the number of bytes representing one second of audio. | 78 // Returns the number of bytes representing one second of audio. |
82 int GetBytesPerSecond() const; | 79 int GetBytesPerSecond() const; |
83 | 80 |
84 // Returns the number of bytes representing a frame of audio. | 81 // Returns the number of bytes representing a frame of audio. |
85 int GetBytesPerFrame() const; | 82 int GetBytesPerFrame() const; |
86 | 83 |
87 // Returns the duration of this buffer as calculated from frames_per_buffer() | 84 // Returns the duration of this buffer as calculated from frames_per_buffer() |
88 // and sample_rate(). | 85 // and sample_rate(). |
89 base::TimeDelta GetBufferDuration() const; | 86 base::TimeDelta GetBufferDuration() const; |
90 | 87 |
91 Format format() const { return format_; } | 88 Format format() const { return format_; } |
92 ChannelLayout channel_layout() const { return channel_layout_; } | 89 ChannelLayout channel_layout() const { return channel_layout_; } |
93 int sample_rate() const { return sample_rate_; } | 90 int sample_rate() const { return sample_rate_; } |
94 int bits_per_sample() const { return bits_per_sample_; } | 91 int bits_per_sample() const { return bits_per_sample_; } |
95 int frames_per_buffer() const { return frames_per_buffer_; } | 92 int frames_per_buffer() const { return frames_per_buffer_; } |
96 int channels() const { return channels_; } | 93 int channels() const { return channels_; } |
97 int input_channels() const { return input_channels_; } | |
98 int effects() const { return effects_; } | 94 int effects() const { return effects_; } |
99 | 95 |
100 // Comparison with other AudioParams. | 96 // Comparison with other AudioParams. |
101 bool operator==(const AudioParameters& other) const { | 97 bool operator==(const AudioParameters& other) const { |
102 return format_ == other.format() && | 98 return format_ == other.format() && |
103 sample_rate_ == other.sample_rate() && | 99 sample_rate_ == other.sample_rate() && |
104 channel_layout_ == other.channel_layout() && | 100 channel_layout_ == other.channel_layout() && |
105 channels_ == other.channels() && | 101 channels_ == other.channels() && |
106 input_channels_ == other.input_channels() && | |
107 bits_per_sample_ == other.bits_per_sample() && | 102 bits_per_sample_ == other.bits_per_sample() && |
108 frames_per_buffer_ == other.frames_per_buffer() && | 103 frames_per_buffer_ == other.frames_per_buffer() && |
109 effects_ == other.effects(); | 104 effects_ == other.effects(); |
110 } | 105 } |
111 | 106 |
112 private: | 107 private: |
113 // These members are mutable to support entire struct assignment. They should | 108 // These members are mutable to support entire struct assignment. They should |
114 // not be mutated individually. | 109 // not be mutated individually. |
115 Format format_; // Format of the stream. | 110 Format format_; // Format of the stream. |
116 ChannelLayout channel_layout_; // Order of surround sound channels. | 111 ChannelLayout channel_layout_; // Order of surround sound channels. |
117 int sample_rate_; // Sampling frequency/rate. | 112 int sample_rate_; // Sampling frequency/rate. |
118 int bits_per_sample_; // Number of bits per sample. | 113 int bits_per_sample_; // Number of bits per sample. |
119 int frames_per_buffer_; // Number of frames in a buffer. | 114 int frames_per_buffer_; // Number of frames in a buffer. |
120 | 115 |
121 int channels_; // Number of channels. Value set based on | 116 int channels_; // Number of channels. Value set based on |
122 // |channel_layout|. | 117 // |channel_layout|. |
123 int input_channels_; // Optional number of input channels. | |
124 // Normally 0, but can be set to specify | |
125 // synchronized I/O. | |
126 int effects_; // Bitmask using PlatformEffectsMask. | 118 int effects_; // Bitmask using PlatformEffectsMask. |
127 }; | 119 }; |
128 | 120 |
129 // Comparison is useful when AudioParameters is used with std structures. | 121 // Comparison is useful when AudioParameters is used with std structures. |
130 inline bool operator<(const AudioParameters& a, const AudioParameters& b) { | 122 inline bool operator<(const AudioParameters& a, const AudioParameters& b) { |
131 if (a.format() != b.format()) | 123 if (a.format() != b.format()) |
132 return a.format() < b.format(); | 124 return a.format() < b.format(); |
133 if (a.channels() != b.channels()) | 125 if (a.channels() != b.channels()) |
134 return a.channels() < b.channels(); | 126 return a.channels() < b.channels(); |
135 if (a.input_channels() != b.input_channels()) | |
136 return a.input_channels() < b.input_channels(); | |
137 if (a.sample_rate() != b.sample_rate()) | 127 if (a.sample_rate() != b.sample_rate()) |
138 return a.sample_rate() < b.sample_rate(); | 128 return a.sample_rate() < b.sample_rate(); |
139 if (a.bits_per_sample() != b.bits_per_sample()) | 129 if (a.bits_per_sample() != b.bits_per_sample()) |
140 return a.bits_per_sample() < b.bits_per_sample(); | 130 return a.bits_per_sample() < b.bits_per_sample(); |
141 return a.frames_per_buffer() < b.frames_per_buffer(); | 131 return a.frames_per_buffer() < b.frames_per_buffer(); |
142 } | 132 } |
143 | 133 |
144 } // namespace media | 134 } // namespace media |
145 | 135 |
146 #endif // MEDIA_AUDIO_AUDIO_PARAMETERS_H_ | 136 #endif // MEDIA_AUDIO_AUDIO_PARAMETERS_H_ |
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