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/*
* Copyright (C) 2018 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_MEDIA_MEDIAMETRICS_H
#define ANDROID_MEDIA_MEDIAMETRICS_H
//
// define a C interface to the media metrics functionality
//
// All functions that return a char * or const char * also give responsibility
// for that string to the caller. The caller is responsible for calling free()
// on that pointer when done using the value.
__BEGIN_DECLS
// internally re-cast to the behind-the-scenes C++ class instance
typedef int64_t mediametrics_handle_t;
typedef const char *mediametricskey_t;
typedef const char *attr_t;
mediametrics_handle_t mediametrics_create(mediametricskey_t key);
void mediametrics_delete(mediametrics_handle_t handle);
mediametricskey_t mediametrics_getKey(mediametrics_handle_t handle);
// set
void mediametrics_setInt32(mediametrics_handle_t handle, attr_t attr,
int32_t value);
void mediametrics_setInt64(mediametrics_handle_t handle, attr_t attr,
int64_t value);
void mediametrics_setDouble(mediametrics_handle_t handle, attr_t attr,
double value);
void mediametrics_setRate(mediametrics_handle_t handle, attr_t attr,
int64_t count, int64_t duration);
void mediametrics_setCString(mediametrics_handle_t handle, attr_t attr,
const char * value);
// fused get/add/set; if attr wasn't there, it's a simple set.
// these do not provide atomicity or mutual exclusion, only simpler code sequences.
void mediametrics_addInt32(mediametrics_handle_t handle, attr_t attr,
int32_t value);
void mediametrics_addInt64(mediametrics_handle_t handle, attr_t attr,
int64_t value);
void mediametrics_addDouble(mediametrics_handle_t handle, attr_t attr,
double value);
void mediametrics_addRate(mediametrics_handle_t handle, attr_t attr,
int64_t count, int64_t duration);
// find & extract values
// return indicates whether attr exists (and thus whether value filled in)
// NULL parameter value suppresses storage of value.
bool mediametrics_getInt32(mediametrics_handle_t handle, attr_t attr,
int32_t * value);
bool mediametrics_getInt64(mediametrics_handle_t handle, attr_t attr,
int64_t * value);
bool mediametrics_getDouble(mediametrics_handle_t handle, attr_t attr,
double *value);
bool mediametrics_getRate(mediametrics_handle_t handle, attr_t attr,
int64_t * count, int64_t * duration, double *rate);
bool mediametrics_getCString(mediametrics_handle_t handle, attr_t attr,
char **value);
// to release strings returned via getCString()
void mediametrics_freeCString(char *value);
// # of attributes set within this record.
int32_t mediametrics_count(mediametrics_handle_t handle);
bool mediametrics_selfRecord(mediametrics_handle_t handle);
const char *mediametrics_readable(mediametrics_handle_t handle);
void mediametrics_setUid(mediametrics_handle_t handle, uid_t uid);
bool mediametrics_isEnabled();
// serialized copy of the attributes/values, mostly for upstream getMetrics() calls
// caller owns the buffer allocated as part of this call.
bool mediametrics_getAttributes(mediametrics_handle_t handle, char **buffer, size_t *length);
__END_DECLS
#endif