1f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)// Copyright 2013 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#include "media/audio/alsa/alsa_input.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/basictypes.h" 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/bind.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/logging.h" 10ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch#include "base/message_loop/message_loop.h" 11eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#include "base/time/time.h" 12f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#include "media/audio/alsa/alsa_output.h" 13f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#include "media/audio/alsa/alsa_util.h" 14f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#include "media/audio/alsa/alsa_wrapper.h" 15f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#include "media/audio/alsa/audio_manager_alsa.h" 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "media/audio/audio_manager.h" 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace media { 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static const int kNumPacketsInRingBuffer = 3; 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static const char kDefaultDevice1[] = "default"; 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static const char kDefaultDevice2[] = "plug:default"; 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)const char AlsaPcmInputStream::kAutoSelectDevice[] = ""; 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 27f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)AlsaPcmInputStream::AlsaPcmInputStream(AudioManagerBase* audio_manager, 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const std::string& device_name, 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const AudioParameters& params, 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AlsaWrapper* wrapper) 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : audio_manager_(audio_manager), 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) device_name_(device_name), 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) params_(params), 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bytes_per_buffer_(params.frames_per_buffer() * 3523730a6e56a168d1879203e4b3819bb36e3d8f1fTorne (Richard Coles) (params.channels() * params.bits_per_sample()) / 3623730a6e56a168d1879203e4b3819bb36e3d8f1fTorne (Richard Coles) 8), 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wrapper_(wrapper), 382a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) buffer_duration_(base::TimeDelta::FromMicroseconds( 392a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) params.frames_per_buffer() * base::Time::kMicrosecondsPerSecond / 402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) static_cast<float>(params.sample_rate()))), 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) callback_(NULL), 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) device_handle_(NULL), 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mixer_handle_(NULL), 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mixer_element_handle_(NULL), 4523730a6e56a168d1879203e4b3819bb36e3d8f1fTorne (Richard Coles) read_callback_behind_schedule_(false), 466d86b77056ed63eb6871182f42a9fd5f07550f90Torne (Richard Coles) audio_bus_(AudioBus::Create(params)), 476d86b77056ed63eb6871182f42a9fd5f07550f90Torne (Richard Coles) weak_factory_(this) { 486d86b77056ed63eb6871182f42a9fd5f07550f90Torne (Richard Coles)} 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)AlsaPcmInputStream::~AlsaPcmInputStream() {} 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool AlsaPcmInputStream::Open() { 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (device_handle_) 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; // Already open. 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) snd_pcm_format_t pcm_format = alsa_util::BitsToFormat( 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) params_.bits_per_sample()); 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (pcm_format == SND_PCM_FORMAT_UNKNOWN) { 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(WARNING) << "Unsupported bits per sample: " 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << params_.bits_per_sample(); 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 642a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) uint32 latency_us = 652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) buffer_duration_.InMicroseconds() * kNumPacketsInRingBuffer; 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Use the same minimum required latency as output. 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) latency_us = std::max(latency_us, AlsaPcmOutputStream::kMinLatencyMicros); 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (device_name_ == kAutoSelectDevice) { 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const char* device_names[] = { kDefaultDevice1, kDefaultDevice2 }; 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (size_t i = 0; i < arraysize(device_names); ++i) { 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) device_handle_ = alsa_util::OpenCaptureDevice( 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wrapper_, device_names[i], params_.channels(), 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) params_.sample_rate(), pcm_format, latency_us); 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (device_handle_) { 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) device_name_ = device_names[i]; 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) device_handle_ = alsa_util::OpenCaptureDevice(wrapper_, 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) device_name_.c_str(), 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) params_.channels(), 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) params_.sample_rate(), 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pcm_format, latency_us); 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (device_handle_) { 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) audio_buffer_.reset(new uint8[bytes_per_buffer_]); 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Open the microphone mixer. 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mixer_handle_ = alsa_util::OpenMixer(wrapper_, device_name_); 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (mixer_handle_) { 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mixer_element_handle_ = alsa_util::LoadCaptureMixerElement( 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wrapper_, mixer_handle_); 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return device_handle_ != NULL; 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AlsaPcmInputStream::Start(AudioInputCallback* callback) { 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(!callback_ && callback); 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) callback_ = callback; 10790dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) StartAgc(); 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int error = wrapper_->PcmPrepare(device_handle_); 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (error < 0) { 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) HandleError("PcmPrepare", error); 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) error = wrapper_->PcmStart(device_handle_); 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (error < 0) 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) HandleError("PcmStart", error); 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (error < 0) { 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) callback_ = NULL; 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 1202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // We start reading data half |buffer_duration_| later than when the 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // buffer might have got filled, to accommodate some delays in the audio 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // driver. This could also give us a smooth read sequence going forward. 1232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) base::TimeDelta delay = buffer_duration_ + buffer_duration_ / 2; 1247d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) next_read_time_ = base::TimeTicks::Now() + delay; 125c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) base::MessageLoop::current()->PostDelayedTask( 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FROM_HERE, 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::Bind(&AlsaPcmInputStream::ReadAudio, weak_factory_.GetWeakPtr()), 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) delay); 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool AlsaPcmInputStream::Recover(int original_error) { 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int error = wrapper_->PcmRecover(device_handle_, original_error, 1); 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (error < 0) { 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Docs say snd_pcm_recover returns the original error if it is not one 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // of the recoverable ones, so this log message will probably contain the 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // same error twice. 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(WARNING) << "Unable to recover from \"" 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << wrapper_->StrError(original_error) << "\": " 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << wrapper_->StrError(error); 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (original_error == -EPIPE) { // Buffer underrun/overrun. 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // For capture streams we have to repeat the explicit start() to get 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // data flowing again. 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) error = wrapper_->PcmStart(device_handle_); 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (error < 0) { 1495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) HandleError("PcmStart", error); 1505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 1515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 1555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)snd_pcm_sframes_t AlsaPcmInputStream::GetCurrentDelay() { 1585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) snd_pcm_sframes_t delay = -1; 1595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int error = wrapper_->PcmDelay(device_handle_, &delay); 1615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (error < 0) 1625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Recover(error); 1635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // snd_pcm_delay() may not work in the beginning of the stream. In this case 1655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // return delay of data we know currently is in the ALSA's buffer. 1665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (delay < 0) 1675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) delay = wrapper_->PcmAvailUpdate(device_handle_); 1685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return delay; 1705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AlsaPcmInputStream::ReadAudio() { 1735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(callback_); 1745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) snd_pcm_sframes_t frames = wrapper_->PcmAvailUpdate(device_handle_); 1765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (frames < 0) { // Potentially recoverable error? 1775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(WARNING) << "PcmAvailUpdate(): " << wrapper_->StrError(frames); 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Recover(frames); 1795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (frames < params_.frames_per_buffer()) { 1825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Not enough data yet or error happened. In both cases wait for a very 1835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // small duration before checking again. 1845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Even Though read callback was behind schedule, there is no data, so 1855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // reset the next_read_time_. 1865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (read_callback_behind_schedule_) { 1877d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) next_read_time_ = base::TimeTicks::Now(); 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) read_callback_behind_schedule_ = false; 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1912a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) base::TimeDelta next_check_time = buffer_duration_ / 2; 192c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) base::MessageLoop::current()->PostDelayedTask( 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FROM_HERE, 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::Bind(&AlsaPcmInputStream::ReadAudio, weak_factory_.GetWeakPtr()), 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) next_check_time); 1965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int num_buffers = frames / params_.frames_per_buffer(); 2005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32 hardware_delay_bytes = 2015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static_cast<uint32>(GetCurrentDelay() * params_.GetBytesPerFrame()); 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) double normalized_volume = 0.0; 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Update the AGC volume level once every second. Note that, |volume| is 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // also updated each time SetVolume() is called through IPC by the 2065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // render-side AGC. 20790dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) GetAgcVolume(&normalized_volume); 2085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) while (num_buffers--) { 2105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int frames_read = wrapper_->PcmReadi(device_handle_, audio_buffer_.get(), 2115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) params_.frames_per_buffer()); 2125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (frames_read == params_.frames_per_buffer()) { 2136d86b77056ed63eb6871182f42a9fd5f07550f90Torne (Richard Coles) audio_bus_->FromInterleaved(audio_buffer_.get(), 2146d86b77056ed63eb6871182f42a9fd5f07550f90Torne (Richard Coles) audio_bus_->frames(), 2156d86b77056ed63eb6871182f42a9fd5f07550f90Torne (Richard Coles) params_.bits_per_sample() / 8); 2166d86b77056ed63eb6871182f42a9fd5f07550f90Torne (Richard Coles) callback_->OnData( 2176d86b77056ed63eb6871182f42a9fd5f07550f90Torne (Richard Coles) this, audio_bus_.get(), hardware_delay_bytes, normalized_volume); 2185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 2195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(WARNING) << "PcmReadi returning less than expected frames: " 2205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << frames_read << " vs. " << params_.frames_per_buffer() 2215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << ". Dropping this buffer."; 2225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) next_read_time_ += buffer_duration_; 2267d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) base::TimeDelta delay = next_read_time_ - base::TimeTicks::Now(); 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (delay < base::TimeDelta()) { 2282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DVLOG(1) << "Audio read callback behind schedule by " 2292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) << (buffer_duration_ - delay).InMicroseconds() 2302a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) << " (us)."; 2315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Read callback is behind schedule. Assuming there is data pending in 2325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the soundcard, invoke the read callback immediate in order to catch up. 2335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) read_callback_behind_schedule_ = true; 2345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) delay = base::TimeDelta(); 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 237c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) base::MessageLoop::current()->PostDelayedTask( 2385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FROM_HERE, 2395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::Bind(&AlsaPcmInputStream::ReadAudio, weak_factory_.GetWeakPtr()), 2405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) delay); 2415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AlsaPcmInputStream::Stop() { 2445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!device_handle_ || !callback_) 2455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 2465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 24790dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) StopAgc(); 24890dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) 2495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) weak_factory_.InvalidateWeakPtrs(); // Cancel the next scheduled read. 2505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int error = wrapper_->PcmDrop(device_handle_); 2515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (error < 0) 2525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) HandleError("PcmDrop", error); 2535d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 2545d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) callback_ = NULL; 2555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AlsaPcmInputStream::Close() { 2585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (device_handle_) { 2595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) weak_factory_.InvalidateWeakPtrs(); // Cancel the next scheduled read. 2605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int error = alsa_util::CloseDevice(wrapper_, device_handle_); 2615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (error < 0) 2625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) HandleError("PcmClose", error); 2635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (mixer_handle_) 2655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) alsa_util::CloseMixer(wrapper_, mixer_handle_, device_name_); 2665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) audio_buffer_.reset(); 2685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) device_handle_ = NULL; 2695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mixer_handle_ = NULL; 2705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mixer_element_handle_ = NULL; 2715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) audio_manager_->ReleaseInputStream(this); 2745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)double AlsaPcmInputStream::GetMaxVolume() { 2775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!mixer_handle_ || !mixer_element_handle_) { 2785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DLOG(WARNING) << "GetMaxVolume is not supported for " << device_name_; 2795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0.0; 2805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!wrapper_->MixerSelemHasCaptureVolume(mixer_element_handle_)) { 2835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DLOG(WARNING) << "Unsupported microphone volume for " << device_name_; 2845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0.0; 2855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) long min = 0; 2885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) long max = 0; 2895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (wrapper_->MixerSelemGetCaptureVolumeRange(mixer_element_handle_, 2905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) &min, 2915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) &max)) { 2925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DLOG(WARNING) << "Unsupported max microphone volume for " << device_name_; 2935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0.0; 2945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(min == 0); 2965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(max > 0); 2975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return static_cast<double>(max); 2995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AlsaPcmInputStream::SetVolume(double volume) { 3025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!mixer_handle_ || !mixer_element_handle_) { 3035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DLOG(WARNING) << "SetVolume is not supported for " << device_name_; 3045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 3055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int error = wrapper_->MixerSelemSetCaptureVolumeAll( 3085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mixer_element_handle_, static_cast<long>(volume)); 3095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (error < 0) { 3105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DLOG(WARNING) << "Unable to set volume for " << device_name_; 3115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Update the AGC volume level based on the last setting above. Note that, 3145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the volume-level resolution is not infinite and it is therefore not 3155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // possible to assume that the volume provided as input parameter can be 3165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // used directly. Instead, a new query to the audio hardware is required. 3175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // This method does nothing if AGC is disabled. 3185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) UpdateAgcVolume(); 3195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)double AlsaPcmInputStream::GetVolume() { 3225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!mixer_handle_ || !mixer_element_handle_) { 3235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DLOG(WARNING) << "GetVolume is not supported for " << device_name_; 3245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0.0; 3255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) long current_volume = 0; 3285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int error = wrapper_->MixerSelemGetCaptureVolume( 3295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mixer_element_handle_, static_cast<snd_mixer_selem_channel_id_t>(0), 3305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ¤t_volume); 3315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (error < 0) { 3325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DLOG(WARNING) << "Unable to get volume for " << device_name_; 3335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0.0; 3345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return static_cast<double>(current_volume); 3375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 339ab8f6f0bd665d3c1ff476eb06c58c42630e462d4Ben Murdochbool AlsaPcmInputStream::IsMuted() { 340ab8f6f0bd665d3c1ff476eb06c58c42630e462d4Ben Murdoch return false; 341ab8f6f0bd665d3c1ff476eb06c58c42630e462d4Ben Murdoch} 342ab8f6f0bd665d3c1ff476eb06c58c42630e462d4Ben Murdoch 3435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AlsaPcmInputStream::HandleError(const char* method, int error) { 3445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(WARNING) << method << ": " << wrapper_->StrError(error); 3452a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) callback_->OnError(this); 3465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace media 349