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| 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 | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "media/audio/audio_parameters.h" | |
| 6 | |
| 7 #include "base/logging.h" | |
| 8 #include "media/base/limits.h" | |
| 9 | |
| 10 namespace media { | |
| 11 | |
| 12 AudioParameters::AudioParameters() | |
| 13 : AudioParameters(AUDIO_PCM_LINEAR, CHANNEL_LAYOUT_NONE, 0, 0, 0) {} | |
| 14 | |
| 15 AudioParameters::AudioParameters(Format format, | |
| 16 ChannelLayout channel_layout, | |
| 17 int sample_rate, | |
| 18 int bits_per_sample, | |
| 19 int frames_per_buffer) { | |
| 20 Reset(format, channel_layout, sample_rate, bits_per_sample, | |
| 21 frames_per_buffer); | |
| 22 } | |
| 23 | |
| 24 AudioParameters::~AudioParameters() {} | |
| 25 | |
| 26 AudioParameters::AudioParameters(const AudioParameters&) = default; | |
| 27 AudioParameters& AudioParameters::operator=(const AudioParameters&) = default; | |
| 28 | |
| 29 void AudioParameters::Reset(Format format, | |
| 30 ChannelLayout channel_layout, | |
| 31 int sample_rate, | |
| 32 int bits_per_sample, | |
| 33 int frames_per_buffer) { | |
| 34 format_ = format; | |
| 35 channel_layout_ = channel_layout; | |
| 36 channels_ = ChannelLayoutToChannelCount(channel_layout); | |
| 37 sample_rate_ = sample_rate; | |
| 38 bits_per_sample_ = bits_per_sample; | |
| 39 frames_per_buffer_ = frames_per_buffer; | |
| 40 effects_ = NO_EFFECTS; | |
| 41 mic_positions_.clear(); | |
| 42 } | |
| 43 | |
| 44 bool AudioParameters::IsValid() const { | |
| 45 return (channels_ > 0) && (channels_ <= media::limits::kMaxChannels) && | |
| 46 (channel_layout_ > CHANNEL_LAYOUT_UNSUPPORTED) && | |
| 47 (sample_rate_ >= media::limits::kMinSampleRate) && | |
| 48 (sample_rate_ <= media::limits::kMaxSampleRate) && | |
| 49 (bits_per_sample_ > 0) && | |
| 50 (bits_per_sample_ <= media::limits::kMaxBitsPerSample) && | |
| 51 (frames_per_buffer_ > 0) && | |
| 52 (frames_per_buffer_ <= media::limits::kMaxSamplesPerPacket) && | |
| 53 (channel_layout_ == CHANNEL_LAYOUT_DISCRETE || | |
| 54 channels_ == ChannelLayoutToChannelCount(channel_layout_)); | |
| 55 } | |
| 56 | |
| 57 std::string AudioParameters::AsHumanReadableString() const { | |
| 58 std::ostringstream s; | |
| 59 s << "format: " << format() << " channel_layout: " << channel_layout() | |
| 60 << " channels: " << channels() << " sample_rate: " << sample_rate() | |
| 61 << " bits_per_sample: " << bits_per_sample() | |
| 62 << " frames_per_buffer: " << frames_per_buffer() | |
| 63 << " effects: " << effects() | |
| 64 << " mic_positions: " << PointsToString(mic_positions_); | |
| 65 return s.str(); | |
| 66 } | |
| 67 | |
| 68 int AudioParameters::GetBytesPerBuffer() const { | |
| 69 return frames_per_buffer_ * GetBytesPerFrame(); | |
| 70 } | |
| 71 | |
| 72 int AudioParameters::GetBytesPerSecond() const { | |
| 73 return sample_rate_ * GetBytesPerFrame(); | |
| 74 } | |
| 75 | |
| 76 int AudioParameters::GetBytesPerFrame() const { | |
| 77 return channels_ * bits_per_sample_ / 8; | |
| 78 } | |
| 79 | |
| 80 double AudioParameters::GetMicrosecondsPerFrame() const { | |
| 81 return static_cast<double>(base::Time::kMicrosecondsPerSecond) / sample_rate_; | |
| 82 } | |
| 83 | |
| 84 base::TimeDelta AudioParameters::GetBufferDuration() const { | |
| 85 return base::TimeDelta::FromMicroseconds(static_cast<int64_t>( | |
| 86 frames_per_buffer_ * base::Time::kMicrosecondsPerSecond / | |
| 87 static_cast<float>(sample_rate_))); | |
| 88 } | |
| 89 | |
| 90 bool AudioParameters::Equals(const AudioParameters& other) const { | |
| 91 return format_ == other.format() && sample_rate_ == other.sample_rate() && | |
| 92 channel_layout_ == other.channel_layout() && | |
| 93 channels_ == other.channels() && | |
| 94 bits_per_sample_ == other.bits_per_sample() && | |
| 95 frames_per_buffer_ == other.frames_per_buffer() && | |
| 96 effects_ == other.effects() && mic_positions_ == other.mic_positions_; | |
| 97 } | |
| 98 | |
| 99 // static | |
| 100 AudioParameters AudioParameters::UnavailableDeviceParams() { | |
| 101 return media::AudioParameters( | |
| 102 media::AudioParameters::AUDIO_FAKE, media::CHANNEL_LAYOUT_STEREO, | |
| 103 media::AudioParameters::kAudioCDSampleRate, 16, | |
| 104 media::AudioParameters::kAudioCDSampleRate / 10); | |
| 105 } | |
| 106 | |
| 107 } // namespace media | |
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Chromium Code Reviews
Issue 1907973003:
media: Move audio_parameters and audio_point to media/base/ (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master