--- media/audio/sndio/sndio_input.cc.orig 2022-02-28 16:54:41 UTC
+++ media/audio/sndio/sndio_input.cc
@@ -0,0 +1,201 @@
+// 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 "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<SndioAudioInputStream*>(arg);
+
+ self->hw_delay += delta;
+}
+
+void *SndioAudioInputStream::ThreadEntry(void *arg) {
+ SndioAudioInputStream* self = static_cast<SndioAudioInputStream*>(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();
+}
+
+AudioInputStream::OpenOutcome SndioAudioInputStream::Open() {
+ struct sio_par par;
+ int sig;
+
+ if (state != kClosed)
+ return OpenOutcome::kFailed;
+
+ if (params.format() != AudioParameters::AUDIO_PCM_LINEAR &&
+ params.format() != AudioParameters::AUDIO_PCM_LOW_LATENCY) {
+ LOG(WARNING) << "Unsupported audio format.";
+ return OpenOutcome::kFailed;
+ }
+
+ 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 OpenOutcome::kFailed;
+ }
+
+ 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 OpenOutcome::kSuccess;
+bad_close:
+ sio_close(hdl);
+ return OpenOutcome::kFailed;
+}
+
+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)
+ goto release;
+
+ if (state == kRunning)
+ Stop();
+
+ state = kClosed;
+ delete [] buffer;
+ sio_close(hdl);
+
+release:
+ 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<SignedInt16SampleTypeTraits>(reinterpret_cast<int16_t*>(buffer), nframes);
+
+
+ // invoke callback
+ callback->OnData(audio_bus.get(), base::TimeTicks::Now() - delay, 1.);
+ }
+}
+
+} // namespace media
