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/*
* Copyright (C) 2014 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 AUDIO_POLICY_HELPER_H_
#define AUDIO_POLICY_HELPER_H_
#include <system/audio.h>
static audio_stream_type_t audio_attributes_to_stream_type(const audio_attributes_t *attr)
{
// flags to stream type mapping
if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
return AUDIO_STREAM_ENFORCED_AUDIBLE;
}
if ((attr->flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
return AUDIO_STREAM_BLUETOOTH_SCO;
}
// usage to stream type mapping
switch (attr->usage) {
case AUDIO_USAGE_MEDIA:
case AUDIO_USAGE_GAME:
case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
return AUDIO_STREAM_MUSIC;
case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
return AUDIO_STREAM_SYSTEM;
case AUDIO_USAGE_VOICE_COMMUNICATION:
return AUDIO_STREAM_VOICE_CALL;
case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
return AUDIO_STREAM_DTMF;
case AUDIO_USAGE_ALARM:
return AUDIO_STREAM_ALARM;
case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
return AUDIO_STREAM_RING;
case AUDIO_USAGE_NOTIFICATION:
case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
case AUDIO_USAGE_NOTIFICATION_EVENT:
return AUDIO_STREAM_NOTIFICATION;
case AUDIO_USAGE_UNKNOWN:
default:
return AUDIO_STREAM_MUSIC;
}
}
static void stream_type_to_audio_attributes(audio_stream_type_t streamType,
audio_attributes_t *attr) {
memset(attr, 0, sizeof(audio_attributes_t));
switch (streamType) {
case AUDIO_STREAM_DEFAULT:
case AUDIO_STREAM_MUSIC:
attr->content_type = AUDIO_CONTENT_TYPE_MUSIC;
attr->usage = AUDIO_USAGE_MEDIA;
break;
case AUDIO_STREAM_VOICE_CALL:
attr->content_type = AUDIO_CONTENT_TYPE_SPEECH;
attr->usage = AUDIO_USAGE_VOICE_COMMUNICATION;
break;
case AUDIO_STREAM_ENFORCED_AUDIBLE:
attr->flags |= AUDIO_FLAG_AUDIBILITY_ENFORCED;
// intended fall through, attributes in common with STREAM_SYSTEM
case AUDIO_STREAM_SYSTEM:
attr->content_type = AUDIO_CONTENT_TYPE_SONIFICATION;
attr->usage = AUDIO_USAGE_ASSISTANCE_SONIFICATION;
break;
case AUDIO_STREAM_RING:
attr->content_type = AUDIO_CONTENT_TYPE_SONIFICATION;
attr->usage = AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE;
break;
case AUDIO_STREAM_ALARM:
attr->content_type = AUDIO_CONTENT_TYPE_SONIFICATION;
attr->usage = AUDIO_USAGE_ALARM;
break;
case AUDIO_STREAM_NOTIFICATION:
attr->content_type = AUDIO_CONTENT_TYPE_SONIFICATION;
attr->usage = AUDIO_USAGE_NOTIFICATION;
break;
case AUDIO_STREAM_BLUETOOTH_SCO:
attr->content_type = AUDIO_CONTENT_TYPE_SPEECH;
attr->usage = AUDIO_USAGE_VOICE_COMMUNICATION;
attr->flags |= AUDIO_FLAG_SCO;
break;
case AUDIO_STREAM_DTMF:
attr->content_type = AUDIO_CONTENT_TYPE_SONIFICATION;
attr->usage = AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING;
break;
case AUDIO_STREAM_TTS:
attr->content_type = AUDIO_CONTENT_TYPE_SPEECH;
attr->usage = AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY;
break;
default:
ALOGE("invalid stream type %d when converting to attributes", streamType);
}
}
#endif //AUDIO_POLICY_HELPER_H_
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