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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 #include <limits> | 5 #include <limits> |
| 6 #include <set> | 6 #include <set> |
| 7 | 7 |
| 8 #include "mojo/services/media/common/cpp/local_time.h" | 8 #include "mojo/services/media/common/cpp/local_time.h" |
| 9 #include "services/media/audio/platform/linux/alsa_output.h" | 9 #include "services/media/audio/platform/linux/alsa_output.h" |
| 10 | 10 |
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| 44 // output's configuration, and disabling resampling at the ALSA level. | 44 // output's configuration, and disabling resampling at the ALSA level. |
| 45 // | 45 // |
| 46 // If we could own the output entirely and bypass the mixer to achieve lower | 46 // If we could own the output entirely and bypass the mixer to achieve lower |
| 47 // latency, that would be even better. | 47 // latency, that would be even better. |
| 48 AudioOutputPtr audio_out(audio::AlsaOutput::New(manager)); | 48 AudioOutputPtr audio_out(audio::AlsaOutput::New(manager)); |
| 49 if (!audio_out) { return nullptr; } | 49 if (!audio_out) { return nullptr; } |
| 50 | 50 |
| 51 AlsaOutput* alsa_out = static_cast<AlsaOutput*>(audio_out.get()); | 51 AlsaOutput* alsa_out = static_cast<AlsaOutput*>(audio_out.get()); |
| 52 DCHECK(alsa_out); | 52 DCHECK(alsa_out); |
| 53 | 53 |
| 54 LpcmMediaTypeDetailsPtr config(LpcmMediaTypeDetails::New()); | 54 AudioMediaTypeDetailsPtr config(AudioMediaTypeDetails::New()); |
| 55 config->frames_per_second = 48000; | 55 config->frames_per_second = 48000; |
| 56 config->channels = 2; | 56 config->channels = 2; |
| 57 config->sample_format = LpcmSampleFormat::SIGNED_16; | 57 config->sample_format = AudioSampleFormat::SIGNED_16; |
| 58 | 58 |
| 59 if (alsa_out->Configure(config.Pass()) != MediaResult::OK) { | 59 if (alsa_out->Configure(config.Pass()) != MediaResult::OK) { |
| 60 return nullptr; | 60 return nullptr; |
| 61 } | 61 } |
| 62 | 62 |
| 63 return audio_out; | 63 return audio_out; |
| 64 } | 64 } |
| 65 | 65 |
| 66 AlsaOutput::AlsaOutput(AudioOutputManager* manager) | 66 AlsaOutput::AlsaOutput(AudioOutputManager* manager) |
| 67 : StandardOutputBase(manager) {} | 67 : StandardOutputBase(manager) {} |
| 68 | 68 |
| 69 AlsaOutput::~AlsaOutput() { | 69 AlsaOutput::~AlsaOutput() { |
| 70 // We should have been cleaned up already, but in release builds, call cleanup | 70 // We should have been cleaned up already, but in release builds, call cleanup |
| 71 // anyway, just in case something got missed. | 71 // anyway, just in case something got missed. |
| 72 DCHECK(!alsa_device_); | 72 DCHECK(!alsa_device_); |
| 73 Cleanup(); | 73 Cleanup(); |
| 74 } | 74 } |
| 75 | 75 |
| 76 AudioOutputPtr AlsaOutput::New(AudioOutputManager* manager) { | 76 AudioOutputPtr AlsaOutput::New(AudioOutputManager* manager) { |
| 77 return AudioOutputPtr(new AlsaOutput(manager)); | 77 return AudioOutputPtr(new AlsaOutput(manager)); |
| 78 } | 78 } |
| 79 | 79 |
| 80 MediaResult AlsaOutput::Configure(LpcmMediaTypeDetailsPtr config) { | 80 MediaResult AlsaOutput::Configure(AudioMediaTypeDetailsPtr config) { |
| 81 if (!config) { return MediaResult::INVALID_ARGUMENT; } | 81 if (!config) { return MediaResult::INVALID_ARGUMENT; } |
| 82 if (output_formatter_) { return MediaResult::BAD_STATE; } | 82 if (output_formatter_) { return MediaResult::BAD_STATE; } |
| 83 | 83 |
| 84 output_formatter_ = OutputFormatter::Select(config); | 84 output_formatter_ = OutputFormatter::Select(config); |
| 85 if (!output_formatter_) { return MediaResult::UNSUPPORTED_CONFIG; } | 85 if (!output_formatter_) { return MediaResult::UNSUPPORTED_CONFIG; } |
| 86 | 86 |
| 87 MediaResult res = AlsaSelectFormat(config); | 87 MediaResult res = AlsaSelectFormat(config); |
| 88 if (res != MediaResult::OK) { return res; } | 88 if (res != MediaResult::OK) { return res; } |
| 89 DCHECK_GE(alsa_format_, 0); | 89 DCHECK_GE(alsa_format_, 0); |
| 90 | 90 |
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| 339 if (code == -EPIPE) { | 339 if (code == -EPIPE) { |
| 340 HandleAsUnderflow(); | 340 HandleAsUnderflow(); |
| 341 } else { | 341 } else { |
| 342 HandleAsError(code); | 342 HandleAsError(code); |
| 343 } | 343 } |
| 344 } | 344 } |
| 345 | 345 |
| 346 } // namespace audio | 346 } // namespace audio |
| 347 } // namespace media | 347 } // namespace media |
| 348 } // namespace mojo | 348 } // namespace mojo |
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