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/*
* Copyright (C) 2008-2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_AUDIOPARAMETER_H_
#define ANDROID_AUDIOPARAMETER_H_
#include <utils/Errors.h>
#include <utils/KeyedVector.h>
#include <utils/String8.h>
namespace android {
class AudioParameter {
public:
AudioParameter() {}
AudioParameter(const String8& keyValuePairs);
virtual ~AudioParameter();
// reserved parameter keys for changing standard parameters with setParameters() function.
// Using these keys is mandatory for AudioFlinger to properly monitor audio output/input
// configuration changes and act accordingly.
// keyRouting: to change audio routing, value is an int in audio_devices_t
// keySamplingRate: to change sampling rate routing, value is an int
// keyFormat: to change audio format, value is an int in audio_format_t
// keyChannels: to change audio channel configuration, value is an int in audio_channels_t
// keyFrameCount: to change audio output frame count, value is an int
// keyInputSource: to change audio input source, value is an int in audio_source_t
// (defined in media/mediarecorder.h)
// keyScreenState: either "on" or "off"
static const char * const keyRouting;
static const char * const keySamplingRate;
static const char * const keyFormat;
static const char * const keyChannels;
static const char * const keyFrameCount;
static const char * const keyInputSource;
static const char * const keyScreenState;
String8 toString();
status_t add(const String8& key, const String8& value);
status_t addInt(const String8& key, const int value);
status_t addFloat(const String8& key, const float value);
status_t remove(const String8& key);
status_t get(const String8& key, String8& value);
status_t getInt(const String8& key, int& value);
status_t getFloat(const String8& key, float& value);
status_t getAt(size_t index, String8& key, String8& value);
size_t size() { return mParameters.size(); }
private:
String8 mKeyValuePairs;
KeyedVector <String8, String8> mParameters;
};
}; // namespace android
#endif /*ANDROID_AUDIOPARAMETER_H_*/
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