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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 #include "media/audio/audio_parameters.h" | 5 #include "media/audio/audio_parameters.h" |
6 | 6 |
7 #include "base/logging.h" | 7 #include "base/logging.h" |
8 #include "media/base/limits.h" | 8 #include "media/base/limits.h" |
9 | 9 |
10 namespace media { | 10 namespace media { |
11 | 11 |
12 AudioParameters::AudioParameters() | 12 AudioParameters::AudioParameters() |
13 : format_(AUDIO_PCM_LINEAR), | 13 : format_(AUDIO_PCM_LINEAR), |
14 channel_layout_(CHANNEL_LAYOUT_NONE), | 14 channel_layout_(CHANNEL_LAYOUT_NONE), |
15 sample_rate_(0), | 15 sample_rate_(0), |
16 bits_per_sample_(0), | 16 bits_per_sample_(0), |
17 frames_per_buffer_(0), | 17 frames_per_buffer_(0), |
18 channels_(0), | 18 channels_(0), |
| 19 input_channels_(0), |
19 effects_(NO_EFFECTS) { | 20 effects_(NO_EFFECTS) { |
20 } | 21 } |
21 | 22 |
22 AudioParameters::AudioParameters(Format format, ChannelLayout channel_layout, | 23 AudioParameters::AudioParameters(Format format, ChannelLayout channel_layout, |
23 int sample_rate, int bits_per_sample, | 24 int sample_rate, int bits_per_sample, |
24 int frames_per_buffer) | 25 int frames_per_buffer) |
25 : format_(format), | 26 : format_(format), |
26 channel_layout_(channel_layout), | 27 channel_layout_(channel_layout), |
27 sample_rate_(sample_rate), | 28 sample_rate_(sample_rate), |
28 bits_per_sample_(bits_per_sample), | 29 bits_per_sample_(bits_per_sample), |
29 frames_per_buffer_(frames_per_buffer), | 30 frames_per_buffer_(frames_per_buffer), |
30 channels_(ChannelLayoutToChannelCount(channel_layout)), | 31 channels_(ChannelLayoutToChannelCount(channel_layout)), |
| 32 input_channels_(0), |
31 effects_(NO_EFFECTS) { | 33 effects_(NO_EFFECTS) { |
32 } | 34 } |
33 | 35 |
34 AudioParameters::AudioParameters(Format format, ChannelLayout channel_layout, | 36 AudioParameters::AudioParameters(Format format, ChannelLayout channel_layout, |
| 37 int input_channels, |
35 int sample_rate, int bits_per_sample, | 38 int sample_rate, int bits_per_sample, |
36 int frames_per_buffer, int effects) | 39 int frames_per_buffer, int effects) |
37 : format_(format), | 40 : format_(format), |
38 channel_layout_(channel_layout), | 41 channel_layout_(channel_layout), |
39 sample_rate_(sample_rate), | 42 sample_rate_(sample_rate), |
40 bits_per_sample_(bits_per_sample), | 43 bits_per_sample_(bits_per_sample), |
41 frames_per_buffer_(frames_per_buffer), | 44 frames_per_buffer_(frames_per_buffer), |
42 channels_(ChannelLayoutToChannelCount(channel_layout)), | 45 channels_(ChannelLayoutToChannelCount(channel_layout)), |
| 46 input_channels_(input_channels), |
43 effects_(effects) { | 47 effects_(effects) { |
44 } | 48 } |
45 | 49 |
46 AudioParameters::AudioParameters(Format format, ChannelLayout channel_layout, | 50 AudioParameters::AudioParameters(Format format, ChannelLayout channel_layout, |
47 int channels, int sample_rate, | 51 int channels, int input_channels, |
48 int bits_per_sample, int frames_per_buffer, | 52 int sample_rate, int bits_per_sample, |
49 int effects) | 53 int frames_per_buffer, int effects) |
50 : format_(format), | 54 : format_(format), |
51 channel_layout_(channel_layout), | 55 channel_layout_(channel_layout), |
52 sample_rate_(sample_rate), | 56 sample_rate_(sample_rate), |
53 bits_per_sample_(bits_per_sample), | 57 bits_per_sample_(bits_per_sample), |
54 frames_per_buffer_(frames_per_buffer), | 58 frames_per_buffer_(frames_per_buffer), |
55 channels_(channels), | 59 channels_(channels), |
| 60 input_channels_(input_channels), |
56 effects_(effects) { | 61 effects_(effects) { |
57 if (channel_layout != CHANNEL_LAYOUT_DISCRETE) | 62 if (channel_layout != CHANNEL_LAYOUT_DISCRETE) |
58 DCHECK_EQ(channels, ChannelLayoutToChannelCount(channel_layout)); | 63 DCHECK_EQ(channels, ChannelLayoutToChannelCount(channel_layout)); |
59 } | 64 } |
60 | 65 |
61 void AudioParameters::Reset(Format format, ChannelLayout channel_layout, | 66 void AudioParameters::Reset(Format format, ChannelLayout channel_layout, |
62 int channels, int sample_rate, | 67 int channels, int input_channels, |
63 int bits_per_sample, int frames_per_buffer) { | 68 int sample_rate, int bits_per_sample, |
| 69 int frames_per_buffer) { |
64 if (channel_layout != CHANNEL_LAYOUT_DISCRETE) | 70 if (channel_layout != CHANNEL_LAYOUT_DISCRETE) |
65 DCHECK_EQ(channels, ChannelLayoutToChannelCount(channel_layout)); | 71 DCHECK_EQ(channels, ChannelLayoutToChannelCount(channel_layout)); |
66 | 72 |
67 format_ = format; | 73 format_ = format; |
68 channel_layout_ = channel_layout; | 74 channel_layout_ = channel_layout; |
69 channels_ = channels; | 75 channels_ = channels; |
| 76 input_channels_ = input_channels; |
70 sample_rate_ = sample_rate; | 77 sample_rate_ = sample_rate; |
71 bits_per_sample_ = bits_per_sample; | 78 bits_per_sample_ = bits_per_sample; |
72 frames_per_buffer_ = frames_per_buffer; | 79 frames_per_buffer_ = frames_per_buffer; |
73 } | 80 } |
74 | 81 |
75 bool AudioParameters::IsValid() const { | 82 bool AudioParameters::IsValid() const { |
76 return (format_ >= AUDIO_PCM_LINEAR) && | 83 return (format_ >= AUDIO_PCM_LINEAR) && |
77 (format_ < AUDIO_LAST_FORMAT) && | 84 (format_ < AUDIO_LAST_FORMAT) && |
78 (channels_ > 0) && | 85 (channels_ > 0) && |
79 (channels_ <= media::limits::kMaxChannels) && | 86 (channels_ <= media::limits::kMaxChannels) && |
80 (channel_layout_ > CHANNEL_LAYOUT_UNSUPPORTED) && | 87 (channel_layout_ > CHANNEL_LAYOUT_UNSUPPORTED) && |
81 (channel_layout_ <= CHANNEL_LAYOUT_MAX) && | 88 (channel_layout_ <= CHANNEL_LAYOUT_MAX) && |
| 89 (input_channels_ >= 0) && |
| 90 (input_channels_ <= media::limits::kMaxChannels) && |
82 (sample_rate_ >= media::limits::kMinSampleRate) && | 91 (sample_rate_ >= media::limits::kMinSampleRate) && |
83 (sample_rate_ <= media::limits::kMaxSampleRate) && | 92 (sample_rate_ <= media::limits::kMaxSampleRate) && |
84 (bits_per_sample_ > 0) && | 93 (bits_per_sample_ > 0) && |
85 (bits_per_sample_ <= media::limits::kMaxBitsPerSample) && | 94 (bits_per_sample_ <= media::limits::kMaxBitsPerSample) && |
86 (frames_per_buffer_ > 0) && | 95 (frames_per_buffer_ > 0) && |
87 (frames_per_buffer_ <= media::limits::kMaxSamplesPerPacket); | 96 (frames_per_buffer_ <= media::limits::kMaxSamplesPerPacket); |
88 } | 97 } |
89 | 98 |
90 int AudioParameters::GetBytesPerBuffer() const { | 99 int AudioParameters::GetBytesPerBuffer() const { |
91 return frames_per_buffer_ * GetBytesPerFrame(); | 100 return frames_per_buffer_ * GetBytesPerFrame(); |
92 } | 101 } |
93 | 102 |
94 int AudioParameters::GetBytesPerSecond() const { | 103 int AudioParameters::GetBytesPerSecond() const { |
95 return sample_rate_ * GetBytesPerFrame(); | 104 return sample_rate_ * GetBytesPerFrame(); |
96 } | 105 } |
97 | 106 |
98 int AudioParameters::GetBytesPerFrame() const { | 107 int AudioParameters::GetBytesPerFrame() const { |
99 return channels_ * bits_per_sample_ / 8; | 108 return channels_ * bits_per_sample_ / 8; |
100 } | 109 } |
101 | 110 |
102 base::TimeDelta AudioParameters::GetBufferDuration() const { | 111 base::TimeDelta AudioParameters::GetBufferDuration() const { |
103 return base::TimeDelta::FromMicroseconds( | 112 return base::TimeDelta::FromMicroseconds( |
104 frames_per_buffer_ * base::Time::kMicrosecondsPerSecond / | 113 frames_per_buffer_ * base::Time::kMicrosecondsPerSecond / |
105 static_cast<float>(sample_rate_)); | 114 static_cast<float>(sample_rate_)); |
106 } | 115 } |
107 | 116 |
108 } // namespace media | 117 } // namespace media |
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