92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
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// Copyright 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef MEDIA_AUDIO_SNDIO_SNDIO_INPUT_H_
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#define MEDIA_AUDIO_SNDIO_SNDIO_INPUT_H_
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#include <stdint.h>
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#include <string>
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#include <sndio.h>
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#include "base/compiler_specific.h"
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#include "base/macros.h"
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#include "base/memory/weak_ptr.h"
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#include "base/time/time.h"
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#include "media/audio/agc_audio_stream.h"
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#include "media/audio/audio_io.h"
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#include "media/audio/audio_device_description.h"
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#include "media/base/audio_parameters.h"
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namespace media {
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class AudioManagerBase;
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// Implementation of AudioOutputStream using sndio(7)
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class SndioAudioInputStream : public AgcAudioStream<AudioInputStream> {
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public:
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// Pass this to the constructor if you want to attempt auto-selection
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// of the audio recording device.
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static const char kAutoSelectDevice[];
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// Create a PCM Output stream for the SNDIO device identified by
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// |device_name|. If unsure of what to use for |device_name|, use
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// |kAutoSelectDevice|.
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SndioAudioInputStream(AudioManagerBase* audio_manager,
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const std::string& device_name,
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const AudioParameters& params);
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~SndioAudioInputStream() override;
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// Implementation of AudioInputStream.
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bool Open() override;
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void Start(AudioInputCallback* callback) override;
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void Stop() override;
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void Close() override;
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double GetMaxVolume() override;
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void SetVolume(double volume) override;
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double GetVolume() override;
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bool IsMuted() override;
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void SetOutputDeviceForAec(const std::string& output_device_id) override;
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private:
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enum StreamState {
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kClosed, // Not opened yet
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kStopped, // Device opened, but not started yet
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kRunning, // Started, device playing
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kStopWait // Stopping, waiting for the real-time thread to exit
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};
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// C-style call-backs
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static void OnMoveCallback(void *arg, int delta);
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static void* ThreadEntry(void *arg);
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// Continuously moves data from the device to the consumer
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void ThreadLoop();
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// Our creator, the audio manager needs to be notified when we close.
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AudioManagerBase* manager;
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// Parameters of the source
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AudioParameters params;
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// We store data here for consumer
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std::unique_ptr<AudioBus> audio_bus;
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// Call-back that consumes recorded data
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AudioInputCallback* callback; // Valid during a recording session.
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// Handle of the audio device
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struct sio_hdl* hdl;
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// Current state of the stream
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enum StreamState state;
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// High priority thread running ThreadLoop()
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pthread_t thread;
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// Number of frames buffered in the hardware
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int hw_delay;
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// Temporary buffer where data is stored sndio-compatible format
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char* buffer;
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DISALLOW_COPY_AND_ASSIGN(SndioAudioInputStream);
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};
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} // namespace media
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#endif // MEDIA_AUDIO_SNDIO_SNDIO_INPUT_H_
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