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/*
* Copyright (C) 2015 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.
*/
#pragma once
#include "AudioPort.h"
#include <utils/Errors.h>
#include <system/audio.h>
#include <utils/SortedVector.h>
#include <utils/KeyedVector.h>
namespace android {
class IOProfile;
class AudioMix;
// descriptor for audio inputs. Used to maintain current configuration of each opened audio input
// and keep track of the usage of this input.
class AudioInputDescriptor: public AudioPortConfig
{
public:
AudioInputDescriptor(const sp<IOProfile>& profile);
void setIoHandle(audio_io_handle_t ioHandle);
audio_port_handle_t getId() const;
audio_module_handle_t getModuleHandle() const;
status_t dump(int fd);
audio_io_handle_t mIoHandle; // input handle
audio_devices_t mDevice; // current device this input is routed to
AudioMix *mPolicyMix; // non NULL when used by a dynamic policy
audio_patch_handle_t mPatchHandle;
uint32_t mRefCount; // number of AudioRecord clients using
// this input
uint32_t mOpenRefCount;
audio_source_t mInputSource; // input source selected by application
//(mediarecorder.h)
const sp<IOProfile> mProfile; // I/O profile this output derives from
SortedVector<audio_session_t> mSessions; // audio sessions attached to this input
bool mIsSoundTrigger; // used by a soundtrigger capture
virtual void toAudioPortConfig(struct audio_port_config *dstConfig,
const struct audio_port_config *srcConfig = NULL) const;
virtual sp<AudioPort> getAudioPort() const { return mProfile; }
void toAudioPort(struct audio_port *port) const;
void setPreemptedSessions(const SortedVector<audio_session_t>& sessions);
SortedVector<audio_session_t> getPreemptedSessions() const;
bool hasPreemptedSession(audio_session_t session) const;
void clearPreemptedSessions();
private:
audio_port_handle_t mId;
// Because a preemtible capture session can preempt another one, we end up in an endless loop
// situation were each session is allowed to restart after being preempted,
// thus preempting the other one which restarts and so on.
// To avoid this situation, we store which audio session was preempted when
// a particular input started and prevent preemption of this active input by this session.
// We also inherit sessions from the preempted input to avoid a 3 way preemption loop etc...
SortedVector<audio_session_t> mPreemptedSessions;
};
class AudioInputCollection :
public DefaultKeyedVector< audio_io_handle_t, sp<AudioInputDescriptor> >
{
public:
bool isSourceActive(audio_source_t source) const;
sp<AudioInputDescriptor> getInputFromId(audio_port_handle_t id) const;
uint32_t activeInputsCount() const;
/**
* return io handle of active input or 0 if no input is active
* Only considers inputs from physical devices (e.g. main mic, headset mic) when
* ignoreVirtualInputs is true.
*/
audio_io_handle_t getActiveInput(bool ignoreVirtualInputs = true);
audio_devices_t getSupportedDevices(audio_io_handle_t handle) const;
status_t dump(int fd) const;
};
}; // namespace android
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