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--- media/audio/sndio/sndio_input.h.orig 2022-02-07 13:39:41 UTC
+++ media/audio/sndio/sndio_input.h
@@ -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 <stdint.h>
+#include <string>
+#include <sndio.h>
+
+#include "base/compiler_specific.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<AudioInputStream> {
+ 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(const SndioAudioInputStream&) = delete;
+ SndioAudioInputStream& operator=(const SndioAudioInputStream&) = delete;
+
+ ~SndioAudioInputStream() override;
+
+ // Implementation of AudioInputStream.
+ OpenOutcome 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<AudioBus> 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;
+};
+
+} // namespace media
+
+#endif // MEDIA_AUDIO_SNDIO_SNDIO_INPUT_H_
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