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// Copyright 2014 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 CONTENT_PUBLIC_BROWSER_SPEECH_RECOGNITION_SESSION_PREAMBLE_H_
#define CONTENT_PUBLIC_BROWSER_SPEECH_RECOGNITION_SESSION_PREAMBLE_H_
#include <vector>
#include "base/memory/ref_counted.h"
#include "content/common/content_export.h"
namespace content {
// The preamble is the few seconds of audio before the speech recognition
// starts. This is used to contain trigger audio used to start a voice
// query, such as the 'Ok Google' hotword.
struct CONTENT_EXPORT SpeechRecognitionSessionPreamble
: public base::RefCounted<SpeechRecognitionSessionPreamble> {
SpeechRecognitionSessionPreamble();
// Sampling rate (hz) for the preamble data. i.e. 44100, 32000, etc
int sample_rate;
// Bytes per sample.
int sample_depth;
// Audio data, in little-endian samples.
std::vector<char> sample_data;
private:
friend class base::RefCounted<SpeechRecognitionSessionPreamble>;
~SpeechRecognitionSessionPreamble();
};
} // namespace content
#endif // CONTENT_PUBLIC_BROWSER_SPEECH_RECOGNITION_SESSION_PREAMBLE_H_
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