diff -Naur chromium-83.0.4103.97.orig/media/BUILD.gn chromium-83.0.4103.97/media/BUILD.gn --- a/media/BUILD.gn 2020-06-03 20:40:26.000000000 +0200 +++ b/media/BUILD.gn 2020-06-13 17:32:28.510395975 +0200 @@ -65,6 +65,9 @@ defines += [ "DLOPEN_PULSEAUDIO" ] } } + if (use_sndio) { + defines += [ "USE_SNDIO" ] + } if (use_cras) { defines += [ "USE_CRAS" ] } diff -Naur chromium-83.0.4103.97.orig/media/audio/BUILD.gn chromium-83.0.4103.97/media/audio/BUILD.gn --- a/media/audio/BUILD.gn 2020-06-03 20:39:37.000000000 +0200 +++ b/media/audio/BUILD.gn 2020-06-13 17:32:28.511395969 +0200 @@ -236,6 +236,17 @@ sources += [ "linux/audio_manager_linux.cc" ] } + if (use_sndio) { + libs += [ "sndio" ] + sources += [ + "sndio/audio_manager_sndio.cc", + "sndio/sndio_input.cc", + "sndio/sndio_input.h", + "sndio/sndio_output.cc", + "sndio/sndio_output.h" + ] + } + if (use_alsa) { libs += [ "asound" ] sources += [ diff -Naur chromium-83.0.4103.97.orig/media/audio/linux/audio_manager_linux.cc chromium-83.0.4103.97/media/audio/linux/audio_manager_linux.cc --- a/media/audio/linux/audio_manager_linux.cc 2020-06-03 20:39:37.000000000 +0200 +++ b/media/audio/linux/audio_manager_linux.cc 2020-06-13 18:09:43.623333167 +0200 @@ -19,6 +19,11 @@ #include "media/audio/pulse/audio_manager_pulse.h" #include "media/audio/pulse/pulse_util.h" #endif +#if defined(USE_SNDIO) +#include "media/audio/sndio/audio_manager_sndio.h" +#include "media/audio/sndio/sndio_input.h" +#include "media/audio/sndio/sndio_output.h" +#endif namespace media { std::unique_ptr CreateAudioManager( @@ -39,6 +45,16 @@ audio_log_factory); } +#if defined(USE_SNDIO) + struct sio_hdl *hdl = sio_open(SIO_DEVANY, SIO_PLAY, 0); + if (hdl != NULL) { + sio_close(hdl); + UMA_HISTOGRAM_ENUMERATION("Media.LinuxAudioIO", kSndio, kAudioIOMax + 1); + return std::make_unique(std::move(audio_thread), + audio_log_factory); + } +#endif + #if defined(USE_CRAS) if (base::CommandLine::ForCurrentProcess()->HasSwitch(switches::kUseCras)) { UMA_HISTOGRAM_ENUMERATION("Media.LinuxAudioIO", kCras, kAudioIOMax + 1); diff -Naur chromium-83.0.4103.97.orig/media/audio/sndio/audio_manager_sndio.cc chromium-83.0.4103.97/media/audio/sndio/audio_manager_sndio.cc --- a/media/audio/sndio/audio_manager_sndio.cc 1970-01-01 01:00:00.000000000 +0100 +++ b/media/audio/sndio/audio_manager_sndio.cc 2020-06-13 17:32:28.511395969 +0200 @@ -0,0 +1,148 @@ +// Copyright (c) 2012 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#include "media/audio/sndio/audio_manager_sndio.h" + +#include "base/metrics/histogram_macros.h" +#include "base/memory/ptr_util.h" +#include "media/audio/audio_device_description.h" +#include "media/audio/audio_output_dispatcher.h" +#include "media/audio/sndio/sndio_input.h" +#include "media/audio/sndio/sndio_output.h" +#include "media/base/limits.h" +#include "media/base/media_switches.h" + +namespace media { + + +// Maximum number of output streams that can be open simultaneously. +static const int kMaxOutputStreams = 4; + +// Default sample rate for input and output streams. +static const int kDefaultSampleRate = 48000; + +void AddDefaultDevice(AudioDeviceNames* device_names) { + DCHECK(device_names->empty()); + device_names->push_front(AudioDeviceName::CreateDefault()); +} + +bool AudioManagerSndio::HasAudioOutputDevices() { + return true; +} + +bool AudioManagerSndio::HasAudioInputDevices() { + return true; +} + +void AudioManagerSndio::GetAudioInputDeviceNames( + AudioDeviceNames* device_names) { + DCHECK(device_names->empty()); + AddDefaultDevice(device_names); +} + +void AudioManagerSndio::GetAudioOutputDeviceNames( + AudioDeviceNames* device_names) { + AddDefaultDevice(device_names); +} + +const char* AudioManagerSndio::GetName() { + return "SNDIO"; +} + +AudioParameters AudioManagerSndio::GetInputStreamParameters( + const std::string& device_id) { + static const int kDefaultInputBufferSize = 1024; + + int user_buffer_size = GetUserBufferSize(); + int buffer_size = user_buffer_size ? + user_buffer_size : kDefaultInputBufferSize; + + return AudioParameters( + AudioParameters::AUDIO_PCM_LOW_LATENCY, CHANNEL_LAYOUT_STEREO, + kDefaultSampleRate, buffer_size); +} + +AudioManagerSndio::AudioManagerSndio(std::unique_ptr audio_thread, + AudioLogFactory* audio_log_factory) + : AudioManagerBase(std::move(audio_thread), + audio_log_factory) { + DLOG(WARNING) << "AudioManagerSndio"; + SetMaxOutputStreamsAllowed(kMaxOutputStreams); +} + +AudioManagerSndio::~AudioManagerSndio() { + Shutdown(); +} + +AudioOutputStream* AudioManagerSndio::MakeLinearOutputStream( + const AudioParameters& params, + const LogCallback& log_callback) { + DCHECK_EQ(AudioParameters::AUDIO_PCM_LINEAR, params.format()); + return MakeOutputStream(params); +} + +AudioOutputStream* AudioManagerSndio::MakeLowLatencyOutputStream( + const AudioParameters& params, + const std::string& device_id, + const LogCallback& log_callback) { + DLOG_IF(ERROR, !device_id.empty()) << "Not implemented!"; + DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format()); + return MakeOutputStream(params); +} + +AudioInputStream* AudioManagerSndio::MakeLinearInputStream( + const AudioParameters& params, + const std::string& device_id, + const LogCallback& log_callback) { + DCHECK_EQ(AudioParameters::AUDIO_PCM_LINEAR, params.format()); + return MakeInputStream(params); +} + +AudioInputStream* AudioManagerSndio::MakeLowLatencyInputStream( + const AudioParameters& params, + const std::string& device_id, + const LogCallback& log_callback) { + DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format()); + return MakeInputStream(params); +} + +AudioParameters AudioManagerSndio::GetPreferredOutputStreamParameters( + const std::string& output_device_id, + const AudioParameters& input_params) { + // TODO(tommi): Support |output_device_id|. + DLOG_IF(ERROR, !output_device_id.empty()) << "Not implemented!"; + static const int kDefaultOutputBufferSize = 2048; + + ChannelLayout channel_layout = CHANNEL_LAYOUT_STEREO; + int sample_rate = kDefaultSampleRate; + int buffer_size = kDefaultOutputBufferSize; + if (input_params.IsValid()) { + sample_rate = input_params.sample_rate(); + channel_layout = input_params.channel_layout(); + buffer_size = std::min(buffer_size, input_params.frames_per_buffer()); + } + + int user_buffer_size = GetUserBufferSize(); + if (user_buffer_size) + buffer_size = user_buffer_size; + + return AudioParameters( + AudioParameters::AUDIO_PCM_LOW_LATENCY, channel_layout, + sample_rate, buffer_size); +} + +AudioInputStream* AudioManagerSndio::MakeInputStream( + const AudioParameters& params) { + DLOG(WARNING) << "MakeInputStream"; + return new SndioAudioInputStream(this, + AudioDeviceDescription::kDefaultDeviceId, params); +} + +AudioOutputStream* AudioManagerSndio::MakeOutputStream( + const AudioParameters& params) { + DLOG(WARNING) << "MakeOutputStream"; + return new SndioAudioOutputStream(params, this); +} + +} // namespace media diff -Naur chromium-83.0.4103.97.orig/media/audio/sndio/audio_manager_sndio.h chromium-83.0.4103.97/media/audio/sndio/audio_manager_sndio.h --- a/media/audio/sndio/audio_manager_sndio.h 1970-01-01 01:00:00.000000000 +0100 +++ b/media/audio/sndio/audio_manager_sndio.h 2020-06-13 17:32:28.511395969 +0200 @@ -0,0 +1,65 @@ +// Copyright (c) 2012 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#ifndef MEDIA_AUDIO_SNDIO_AUDIO_MANAGER_SNDIO_H_ +#define MEDIA_AUDIO_SNDIO_AUDIO_MANAGER_SNDIO_H_ + +#include + +#include "base/compiler_specific.h" +#include "base/macros.h" +#include "base/memory/ref_counted.h" +#include "base/threading/thread.h" +#include "media/audio/audio_manager_base.h" + +namespace media { + +class MEDIA_EXPORT AudioManagerSndio : public AudioManagerBase { + public: + AudioManagerSndio(std::unique_ptr audio_thread, + AudioLogFactory* audio_log_factory); + ~AudioManagerSndio() override; + + // Implementation of AudioManager. + bool HasAudioOutputDevices() override; + bool HasAudioInputDevices() override; + void GetAudioInputDeviceNames(AudioDeviceNames* device_names) override; + void GetAudioOutputDeviceNames(AudioDeviceNames* device_names) override; + AudioParameters GetInputStreamParameters( + const std::string& device_id) override; + const char* GetName() override; + + // Implementation of AudioManagerBase. + AudioOutputStream* MakeLinearOutputStream( + const AudioParameters& params, + const LogCallback& log_callback) override; + AudioOutputStream* MakeLowLatencyOutputStream( + const AudioParameters& params, + const std::string& device_id, + const LogCallback& log_callback) override; + AudioInputStream* MakeLinearInputStream( + const AudioParameters& params, + const std::string& device_id, + const LogCallback& log_callback) override; + AudioInputStream* MakeLowLatencyInputStream( + const AudioParameters& params, + const std::string& device_id, + const LogCallback& log_callback) override; + + protected: + AudioParameters GetPreferredOutputStreamParameters( + const std::string& output_device_id, + const AudioParameters& input_params) override; + + private: + // Called by MakeLinearOutputStream and MakeLowLatencyOutputStream. + AudioOutputStream* MakeOutputStream(const AudioParameters& params); + AudioInputStream* MakeInputStream(const AudioParameters& params); + + DISALLOW_COPY_AND_ASSIGN(AudioManagerSndio); +}; + +} // namespace media + +#endif // MEDIA_AUDIO_SNDIO_AUDIO_MANAGER_SNDIO_H_ diff -Naur chromium-83.0.4103.97.orig/media/audio/sndio/sndio_input.cc chromium-83.0.4103.97/media/audio/sndio/sndio_input.cc --- a/media/audio/sndio/sndio_input.cc 1970-01-01 01:00:00.000000000 +0100 +++ b/media/audio/sndio/sndio_input.cc 2020-06-13 17:32:28.511395969 +0200 @@ -0,0 +1,200 @@ +// Copyright 2013 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#include "base/bind.h" +#include "base/logging.h" +#include "base/macros.h" +#include "media/base/audio_timestamp_helper.h" +#include "media/audio/sndio/audio_manager_sndio.h" +#include "media/audio/audio_manager.h" +#include "media/audio/sndio/sndio_input.h" + +namespace media { + +static const SampleFormat kSampleFormat = kSampleFormatS16; + +void SndioAudioInputStream::OnMoveCallback(void *arg, int delta) +{ + SndioAudioInputStream* self = static_cast(arg); + + self->hw_delay += delta; +} + +void *SndioAudioInputStream::ThreadEntry(void *arg) { + SndioAudioInputStream* self = static_cast(arg); + + self->ThreadLoop(); + return NULL; +} + +SndioAudioInputStream::SndioAudioInputStream(AudioManagerBase* manager, + const std::string& device_name, + const AudioParameters& params) + : manager(manager), + params(params), + audio_bus(AudioBus::Create(params)), + state(kClosed) { +} + +SndioAudioInputStream::~SndioAudioInputStream() { + if (state != kClosed) + Close(); +} + +bool SndioAudioInputStream::Open() { + struct sio_par par; + int sig; + + if (state != kClosed) + return false; + + if (params.format() != AudioParameters::AUDIO_PCM_LINEAR && + params.format() != AudioParameters::AUDIO_PCM_LOW_LATENCY) { + LOG(WARNING) << "Unsupported audio format."; + return false; + } + + sio_initpar(&par); + par.rate = params.sample_rate(); + par.rchan = params.channels(); + par.bits = SampleFormatToBitsPerChannel(kSampleFormat); + par.bps = par.bits / 8; + par.sig = sig = par.bits != 8 ? 1 : 0; + par.le = SIO_LE_NATIVE; + par.appbufsz = params.frames_per_buffer(); + + hdl = sio_open(SIO_DEVANY, SIO_REC, 0); + + if (hdl == NULL) { + LOG(ERROR) << "Couldn't open audio device."; + return false; + } + + if (!sio_setpar(hdl, &par) || !sio_getpar(hdl, &par)) { + LOG(ERROR) << "Couldn't set audio parameters."; + goto bad_close; + } + + if (par.rate != (unsigned int)params.sample_rate() || + par.rchan != (unsigned int)params.channels() || + par.bits != (unsigned int)SampleFormatToBitsPerChannel(kSampleFormat) || + par.sig != (unsigned int)sig || + (par.bps > 1 && par.le != SIO_LE_NATIVE) || + (par.bits != par.bps * 8)) { + LOG(ERROR) << "Unsupported audio parameters."; + goto bad_close; + } + state = kStopped; + buffer = new char[audio_bus->frames() * params.GetBytesPerFrame(kSampleFormat)]; + sio_onmove(hdl, &OnMoveCallback, this); + return true; +bad_close: + sio_close(hdl); + return false; +} + +void SndioAudioInputStream::Start(AudioInputCallback* cb) { + + StartAgc(); + + state = kRunning; + hw_delay = 0; + callback = cb; + sio_start(hdl); + if (pthread_create(&thread, NULL, &ThreadEntry, this) != 0) { + LOG(ERROR) << "Failed to create real-time thread for recording."; + sio_stop(hdl); + state = kStopped; + } +} + +void SndioAudioInputStream::Stop() { + + if (state == kStopped) + return; + + state = kStopWait; + pthread_join(thread, NULL); + sio_stop(hdl); + state = kStopped; + + StopAgc(); +} + +void SndioAudioInputStream::Close() { + + if (state == kClosed) + return; + + if (state == kRunning) + Stop(); + + state = kClosed; + delete [] buffer; + sio_close(hdl); + + manager->ReleaseInputStream(this); +} + +double SndioAudioInputStream::GetMaxVolume() { + // Not supported + return 0.0; +} + +void SndioAudioInputStream::SetVolume(double volume) { + // Not supported. Do nothing. +} + +double SndioAudioInputStream::GetVolume() { + // Not supported. + return 0.0; +} + +bool SndioAudioInputStream::IsMuted() { + // Not supported. + return false; +} + +void SndioAudioInputStream::SetOutputDeviceForAec( + const std::string& output_device_id) { + // Not supported. +} + +void SndioAudioInputStream::ThreadLoop(void) { + size_t todo, n; + char *data; + unsigned int nframes; + double normalized_volume = 0.0; + + nframes = audio_bus->frames(); + + while (state == kRunning && !sio_eof(hdl)) { + + GetAgcVolume(&normalized_volume); + + // read one block + todo = nframes * params.GetBytesPerFrame(kSampleFormat); + data = buffer; + while (todo > 0) { + n = sio_read(hdl, data, todo); + if (n == 0) + return; // unrecoverable I/O error + todo -= n; + data += n; + } + hw_delay -= nframes; + + // convert frames count to TimeDelta + const base::TimeDelta delay = AudioTimestampHelper::FramesToTime(hw_delay, + params.sample_rate()); + + // push into bus + audio_bus->FromInterleaved(reinterpret_cast(buffer), nframes); + + // invoke callback + callback->OnData(audio_bus.get(), base::TimeTicks::Now() - delay, 1.); + } +} + +} // namespace media diff -Naur chromium-83.0.4103.97.orig/media/audio/sndio/sndio_input.h chromium-83.0.4103.97/media/audio/sndio/sndio_input.h --- a/media/audio/sndio/sndio_input.h 1970-01-01 01:00:00.000000000 +0100 +++ b/media/audio/sndio/sndio_input.h 2020-06-13 17:32:28.511395969 +0200 @@ -0,0 +1,91 @@ +// Copyright 2013 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#ifndef MEDIA_AUDIO_SNDIO_SNDIO_INPUT_H_ +#define MEDIA_AUDIO_SNDIO_SNDIO_INPUT_H_ + +#include +#include +#include + +#include "base/compiler_specific.h" +#include "base/macros.h" +#include "base/memory/weak_ptr.h" +#include "base/time/time.h" +#include "media/audio/agc_audio_stream.h" +#include "media/audio/audio_io.h" +#include "media/audio/audio_device_description.h" +#include "media/base/audio_parameters.h" + +namespace media { + +class AudioManagerBase; + +// Implementation of AudioOutputStream using sndio(7) +class SndioAudioInputStream : public AgcAudioStream { + public: + // Pass this to the constructor if you want to attempt auto-selection + // of the audio recording device. + static const char kAutoSelectDevice[]; + + // Create a PCM Output stream for the SNDIO device identified by + // |device_name|. If unsure of what to use for |device_name|, use + // |kAutoSelectDevice|. + SndioAudioInputStream(AudioManagerBase* audio_manager, + const std::string& device_name, + const AudioParameters& params); + + ~SndioAudioInputStream() override; + + // Implementation of AudioInputStream. + bool Open() override; + void Start(AudioInputCallback* callback) override; + void Stop() override; + void Close() override; + double GetMaxVolume() override; + void SetVolume(double volume) override; + double GetVolume() override; + bool IsMuted() override; + void SetOutputDeviceForAec(const std::string& output_device_id) override; + + private: + + enum StreamState { + kClosed, // Not opened yet + kStopped, // Device opened, but not started yet + kRunning, // Started, device playing + kStopWait // Stopping, waiting for the real-time thread to exit + }; + + // C-style call-backs + static void OnMoveCallback(void *arg, int delta); + static void* ThreadEntry(void *arg); + + // Continuously moves data from the device to the consumer + void ThreadLoop(); + // Our creator, the audio manager needs to be notified when we close. + AudioManagerBase* manager; + // Parameters of the source + AudioParameters params; + // We store data here for consumer + std::unique_ptr audio_bus; + // Call-back that consumes recorded data + AudioInputCallback* callback; // Valid during a recording session. + // Handle of the audio device + struct sio_hdl* hdl; + // Current state of the stream + enum StreamState state; + // High priority thread running ThreadLoop() + pthread_t thread; + // Number of frames buffered in the hardware + int hw_delay; + // Temporary buffer where data is stored sndio-compatible format + char* buffer; + + DISALLOW_COPY_AND_ASSIGN(SndioAudioInputStream); +}; + +} // namespace media + +#endif // MEDIA_AUDIO_SNDIO_SNDIO_INPUT_H_ diff -Naur chromium-83.0.4103.97.orig/media/audio/sndio/sndio_output.cc chromium-83.0.4103.97/media/audio/sndio/sndio_output.cc --- a/media/audio/sndio/sndio_output.cc 1970-01-01 01:00:00.000000000 +0100 +++ b/media/audio/sndio/sndio_output.cc 2020-06-13 17:32:28.511395969 +0200 @@ -0,0 +1,183 @@ +// Copyright (c) 2012 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#include "base/logging.h" +#include "base/time/time.h" +#include "base/time/default_tick_clock.h" +#include "media/audio/audio_manager_base.h" +#include "media/base/audio_timestamp_helper.h" +#include "media/audio/sndio/sndio_output.h" + +namespace media { + +static const SampleFormat kSampleFormat = kSampleFormatS16; + +void SndioAudioOutputStream::OnMoveCallback(void *arg, int delta) { + SndioAudioOutputStream* self = static_cast(arg); + + self->hw_delay -= delta; +} + +void SndioAudioOutputStream::OnVolCallback(void *arg, unsigned int vol) { + SndioAudioOutputStream* self = static_cast(arg); + + self->vol = vol; +} + +void *SndioAudioOutputStream::ThreadEntry(void *arg) { + SndioAudioOutputStream* self = static_cast(arg); + + self->ThreadLoop(); + return NULL; +} + +SndioAudioOutputStream::SndioAudioOutputStream(const AudioParameters& params, + AudioManagerBase* manager) + : manager(manager), + params(params), + audio_bus(AudioBus::Create(params)), + state(kClosed), + mutex(PTHREAD_MUTEX_INITIALIZER) { +} + +SndioAudioOutputStream::~SndioAudioOutputStream() { + if (state != kClosed) + Close(); +} + +bool SndioAudioOutputStream::Open() { + struct sio_par par; + int sig; + + if (params.format() != AudioParameters::AUDIO_PCM_LINEAR && + params.format() != AudioParameters::AUDIO_PCM_LOW_LATENCY) { + LOG(WARNING) << "Unsupported audio format."; + return false; + } + sio_initpar(&par); + par.rate = params.sample_rate(); + par.pchan = params.channels(); + par.bits = SampleFormatToBitsPerChannel(kSampleFormat); + par.bps = par.bits / 8; + par.sig = sig = par.bits != 8 ? 1 : 0; + par.le = SIO_LE_NATIVE; + par.appbufsz = params.frames_per_buffer(); + + hdl = sio_open(SIO_DEVANY, SIO_PLAY, 0); + if (hdl == NULL) { + LOG(ERROR) << "Couldn't open audio device."; + return false; + } + if (!sio_setpar(hdl, &par) || !sio_getpar(hdl, &par)) { + LOG(ERROR) << "Couldn't set audio parameters."; + goto bad_close; + } + if (par.rate != (unsigned int)params.sample_rate() || + par.pchan != (unsigned int)params.channels() || + par.bits != (unsigned int)SampleFormatToBitsPerChannel(kSampleFormat) || + par.sig != (unsigned int)sig || + (par.bps > 1 && par.le != SIO_LE_NATIVE) || + (par.bits != par.bps * 8)) { + LOG(ERROR) << "Unsupported audio parameters."; + goto bad_close; + } + state = kStopped; + volpending = 0; + vol = 0; + buffer = new char[audio_bus->frames() * params.GetBytesPerFrame(kSampleFormat)]; + sio_onmove(hdl, &OnMoveCallback, this); + sio_onvol(hdl, &OnVolCallback, this); + return true; + bad_close: + sio_close(hdl); + return false; +} + +void SndioAudioOutputStream::Close() { + if (state == kClosed) + return; + if (state == kRunning) + Stop(); + state = kClosed; + delete [] buffer; + sio_close(hdl); + manager->ReleaseOutputStream(this); // Calls the destructor +} + +void SndioAudioOutputStream::Start(AudioSourceCallback* callback) { + state = kRunning; + hw_delay = 0; + source = callback; + sio_start(hdl); + if (pthread_create(&thread, NULL, &ThreadEntry, this) != 0) { + LOG(ERROR) << "Failed to create real-time thread."; + sio_stop(hdl); + state = kStopped; + } +} + +void SndioAudioOutputStream::Stop() { + if (state == kStopped) + return; + state = kStopWait; + pthread_join(thread, NULL); + sio_stop(hdl); + state = kStopped; +} + +void SndioAudioOutputStream::SetVolume(double v) { + pthread_mutex_lock(&mutex); + vol = v * SIO_MAXVOL; + volpending = 1; + pthread_mutex_unlock(&mutex); +} + +void SndioAudioOutputStream::GetVolume(double* v) { + pthread_mutex_lock(&mutex); + *v = vol * (1. / SIO_MAXVOL); + pthread_mutex_unlock(&mutex); +} + +// This stream is always used with sub second buffer sizes, where it's +// sufficient to simply always flush upon Start(). +void SndioAudioOutputStream::Flush() {} + +void SndioAudioOutputStream::ThreadLoop(void) { + int avail, count, result; + + while (state == kRunning) { + // Update volume if needed + pthread_mutex_lock(&mutex); + if (volpending) { + volpending = 0; + sio_setvol(hdl, vol); + } + pthread_mutex_unlock(&mutex); + + // Get data to play + const base::TimeDelta delay = AudioTimestampHelper::FramesToTime(hw_delay, + params.sample_rate()); + count = source->OnMoreData(delay, base::TimeTicks::Now(), 0, audio_bus.get()); + audio_bus->ToInterleaved(count, reinterpret_cast(buffer)); + if (count == 0) { + // We have to submit something to the device + count = audio_bus->frames(); + memset(buffer, 0, count * params.GetBytesPerFrame(kSampleFormat)); + LOG(WARNING) << "No data to play, running empty cycle."; + } + + // Submit data to the device + avail = count * params.GetBytesPerFrame(kSampleFormat); + result = sio_write(hdl, buffer, avail); + if (result == 0) { + LOG(WARNING) << "Audio device disconnected."; + break; + } + + // Update hardware pointer + hw_delay += count; + } +} + +} // namespace media diff -Naur chromium-83.0.4103.97.orig/media/audio/sndio/sndio_output.h chromium-83.0.4103.97/media/audio/sndio/sndio_output.h --- a/media/audio/sndio/sndio_output.h 1970-01-01 01:00:00.000000000 +0100 +++ b/media/audio/sndio/sndio_output.h 2020-06-13 17:32:28.511395969 +0200 @@ -0,0 +1,86 @@ +// Copyright (c) 2012 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#ifndef MEDIA_AUDIO_SNDIO_SNDIO_OUTPUT_H_ +#define MEDIA_AUDIO_SNDIO_SNDIO_OUTPUT_H_ + +#include +#include + +#include "base/time/tick_clock.h" +#include "base/time/time.h" +#include "media/audio/audio_io.h" + +namespace media { + +class AudioManagerBase; + +// Implementation of AudioOutputStream using sndio(7) +class SndioAudioOutputStream : public AudioOutputStream { + public: + // The manager is creating this object + SndioAudioOutputStream(const AudioParameters& params, + AudioManagerBase* manager); + virtual ~SndioAudioOutputStream(); + + // Implementation of AudioOutputStream. + bool Open() override; + void Close() override; + void Start(AudioSourceCallback* callback) override; + void Stop() override; + void SetVolume(double volume) override; + void GetVolume(double* volume) override; + void Flush() override; + + friend void sndio_onmove(void *arg, int delta); + friend void sndio_onvol(void *arg, unsigned int vol); + friend void *sndio_threadstart(void *arg); + + private: + enum StreamState { + kClosed, // Not opened yet + kStopped, // Device opened, but not started yet + kRunning, // Started, device playing + kStopWait // Stopping, waiting for the real-time thread to exit + }; + + // C-style call-backs + static void OnMoveCallback(void *arg, int delta); + static void OnVolCallback(void *arg, unsigned int vol); + static void* ThreadEntry(void *arg); + + // Continuously moves data from the producer to the device + void ThreadLoop(void); + + // Our creator, the audio manager needs to be notified when we close. + AudioManagerBase* manager; + // Parameters of the source + AudioParameters params; + // Source stores data here + std::unique_ptr audio_bus; + // Call-back that produces data to play + AudioSourceCallback* source; + // Handle of the audio device + struct sio_hdl* hdl; + // Current state of the stream + enum StreamState state; + // High priority thread running ThreadLoop() + pthread_t thread; + // Protects vol, volpending and hw_delay + pthread_mutex_t mutex; + // Current volume in the 0..SIO_MAXVOL range + int vol; + // Set to 1 if volumes must be refreshed in the realtime thread + int volpending; + // Number of frames buffered in the hardware + int hw_delay; + // Temporary buffer where data is stored sndio-compatible format + char* buffer; + + DISALLOW_COPY_AND_ASSIGN(SndioAudioOutputStream); +}; + +} // namespace media + +#endif // MEDIA_AUDIO_SNDIO_SNDIO_OUTPUT_H_ diff -Naur chromium-83.0.4103.97.orig/media/media_options.gni chromium-83.0.4103.97/media/media_options.gni --- a/media/media_options.gni 2020-06-03 20:40:26.000000000 +0200 +++ b/media/media_options.gni 2020-06-13 17:32:28.512395963 +0200 @@ -125,6 +125,9 @@ # Enables runtime selection of ALSA library for audio. use_alsa = false + # Enable runtime selection of sndio(7) + use_sndio = false + # Alsa should be used on non-Android, non-Mac POSIX systems (excluding CastOS # video builds). if (is_posix && !is_android && !is_mac &&