media/libmediametrics/include/MediaMetricsConstants.h

/*
 * Copyright (C) 2020 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_MEDIAMETRICSCONSTANTS_H
#define ANDROID_MEDIA_MEDIAMETRICSCONSTANTS_H

/*
 * MediaMetrics Keys and Properties.
 *
 * C/C++ friendly constants that ensure
 * 1) Compilation error on misspelling
 * 2) Consistent behavior and documentation.
 */

/*
 * Taxonomy of audio keys
 *
 * To build longer keys, we use compiler string concatenation of
 * adjacent string literals.  This is done in the translation phase
 * of compilation to make a single string token.
 */

// Key Prefixes are used for MediaMetrics Item Keys and ends with a ".".
// They must be appended with another value to make a key.
#define AMEDIAMETRICS_KEY_PREFIX_AUDIO "audio."

// The AudioRecord key appends the "trackId" to the prefix.
#define AMEDIAMETRICS_KEY_PREFIX_AUDIO_RECORD AMEDIAMETRICS_KEY_PREFIX_AUDIO "record."

// The AudioThread key appends the "threadId" to the prefix.
#define AMEDIAMETRICS_KEY_PREFIX_AUDIO_THREAD AMEDIAMETRICS_KEY_PREFIX_AUDIO "thread."

// The AudioTrack key appends the "trackId" to the prefix.
#define AMEDIAMETRICS_KEY_PREFIX_AUDIO_TRACK  AMEDIAMETRICS_KEY_PREFIX_AUDIO "track."

// Keys are strings used for MediaMetrics Item Keys
#define AMEDIAMETRICS_KEY_AUDIO_FLINGER       AMEDIAMETRICS_KEY_PREFIX_AUDIO "flinger"
#define AMEDIAMETRICS_KEY_AUDIO_POLICY        AMEDIAMETRICS_KEY_PREFIX_AUDIO "policy"

/*
 * MediaMetrics Properties are unified space for consistency and readability.
 */

// Property prefixes may be applied before a property name to indicate a specific
// category to which it is associated.
#define AMEDIAMETRICS_PROP_PREFIX_EFFECTIVE "effective."
#define AMEDIAMETRICS_PROP_PREFIX_HAL       "hal."
#define AMEDIAMETRICS_PROP_PREFIX_HAPTIC    "haptic."
#define AMEDIAMETRICS_PROP_PREFIX_SERVER    "server."

// Properties within mediametrics are string constants denoted by
// a macro name beginning with AMEDIAMETRICS_PROP_*
//
// For a property name like "auxEffectId" we write this as a single upper case word
// at the end of the macro name, such as AMEDIAMETRICS_PROP_AUXEFFECTID.
//
// Underscores after the AMEDIAMETRICS_PROP_* prefix indicate
// a "dot" in the property name. For example AMEDIAMETRICS_PROP_VOLUME_LEFT
// corresponds to "volume.left".
//
// The property names are camel case, typically a lowercase letter [a-z]
// followed by one or more characters in the range [a-zA-Z0-9_.].
// Special symbols such as !@#$%^&*()[]{}<>,:;'"\/?|+-=~ are reserved.
//
// Properties within this header should include special suffixes like '#'
// directly in the string for brevity.  Code outside of this header should
// use the macro constant for the special symbols for searchability.

// Any property that ends with a # will have duplicate values listed instead
// of suppressed in the Time Machine.
#define AMEDIAMETRICS_PROP_SUFFIX_CHAR_DUPLICATES_ALLOWED '#'

#define AMEDIAMETRICS_PROP_AUXEFFECTID    "auxEffectId"    // int32 (AudioTrack)
#define AMEDIAMETRICS_PROP_CHANNELCOUNT   "channelCount"   // int32
#define AMEDIAMETRICS_PROP_CHANNELMASK    "channelMask"    // int32
#define AMEDIAMETRICS_PROP_CONTENTTYPE    "contentType"    // string attributes (AudioTrack)
#define AMEDIAMETRICS_PROP_DURATIONNS     "durationNs"     // int64 duration time span
#define AMEDIAMETRICS_PROP_ENCODING       "encoding"       // string value of format
#define AMEDIAMETRICS_PROP_EVENT          "event#"         // string value (often func name)

// TODO: fix inconsistency in flags: AudioRecord / AudioTrack int32,  AudioThread string
#define AMEDIAMETRICS_PROP_FLAGS          "flags"

#define AMEDIAMETRICS_PROP_FRAMECOUNT     "frameCount"     // int32
#define AMEDIAMETRICS_PROP_INPUTDEVICES   "inputDevices"   // string value
#define AMEDIAMETRICS_PROP_LATENCYMS      "latencyMs"      // double value
#define AMEDIAMETRICS_PROP_ORIGINALFLAGS  "originalFlags"  // int32
#define AMEDIAMETRICS_PROP_OUTPUTDEVICES  "outputDevices"  // string value
#define AMEDIAMETRICS_PROP_PLAYBACK_PITCH "playback.pitch" // double value (AudioTrack)
#define AMEDIAMETRICS_PROP_PLAYBACK_SPEED "playback.speed" // double value (AudioTrack)
#define AMEDIAMETRICS_PROP_ROUTEDDEVICEID "routedDeviceId" // int32
#define AMEDIAMETRICS_PROP_SAMPLERATE     "sampleRate"     // int32
#define AMEDIAMETRICS_PROP_SELECTEDDEVICEID "selectedDeviceId" // int32
#define AMEDIAMETRICS_PROP_SELECTEDMICDIRECTION "selectedMicDirection" // int32
#define AMEDIAMETRICS_PROP_SELECTEDMICFIELDDIRECTION "selectedMicFieldDimension" // double
#define AMEDIAMETRICS_PROP_SESSIONID      "sessionId"      // int32
#define AMEDIAMETRICS_PROP_SOURCE         "source"         // string (AudioAttributes)
#define AMEDIAMETRICS_PROP_STARTUPMS      "startupMs"      // double value
// State is "ACTIVE" or "STOPPED" for AudioRecord
#define AMEDIAMETRICS_PROP_STATE          "state"          // string
#define AMEDIAMETRICS_PROP_STATUS         "status"         // int32 status_t
#define AMEDIAMETRICS_PROP_STREAMTYPE     "streamType"     // string (AudioTrack)
#define AMEDIAMETRICS_PROP_THREADID       "threadId"       // int32 value io handle
#define AMEDIAMETRICS_PROP_THROTTLEMS     "throttleMs"     // double
#define AMEDIAMETRICS_PROP_TRACKID        "trackId"        // int32 port id of track/record
#define AMEDIAMETRICS_PROP_TYPE           "type"           // string (thread type)
#define AMEDIAMETRICS_PROP_UNDERRUN       "underrun"       // int32
#define AMEDIAMETRICS_PROP_USAGE          "usage"          // string attributes (ATrack)
#define AMEDIAMETRICS_PROP_VOLUME_LEFT    "volume.left"    // double (AudioTrack)
#define AMEDIAMETRICS_PROP_VOLUME_RIGHT   "volume.right"   // double (AudioTrack)
#define AMEDIAMETRICS_PROP_WHERE          "where"          // string value

// Timing values: millisecond values are suffixed with MS and the type is double
// nanosecond values are suffixed with NS and the type is int64.

// Values are strings accepted for a given property.

// An event is a general description, which often is a function name.
#define AMEDIAMETRICS_PROP_EVENT_VALUE_CREATE     "create"
#define AMEDIAMETRICS_PROP_EVENT_VALUE_CREATEAUDIOPATCH "createAudioPatch"
#define AMEDIAMETRICS_PROP_EVENT_VALUE_CTOR       "ctor"
#define AMEDIAMETRICS_PROP_EVENT_VALUE_DTOR       "dtor"
#define AMEDIAMETRICS_PROP_EVENT_VALUE_FLUSH      "flush"  // AudioTrack
#define AMEDIAMETRICS_PROP_EVENT_VALUE_INVALIDATE "invalidate" // server track, record
#define AMEDIAMETRICS_PROP_EVENT_VALUE_PAUSE      "pause"  // AudioTrack
#define AMEDIAMETRICS_PROP_EVENT_VALUE_READPARAMETERS "readParameters" // Thread
#define AMEDIAMETRICS_PROP_EVENT_VALUE_RESTORE    "restore"
#define AMEDIAMETRICS_PROP_EVENT_VALUE_SETPLAYBACKPARAM "setPlaybackParam" // AudioTrack
#define AMEDIAMETRICS_PROP_EVENT_VALUE_SETVOLUME  "setVolume"  // AudioTrack
#define AMEDIAMETRICS_PROP_EVENT_VALUE_START      "start"  // AudioTrack, AudioRecord
#define AMEDIAMETRICS_PROP_EVENT_VALUE_STOP       "stop"   // AudioTrack, AudioRecord
#define AMEDIAMETRICS_PROP_EVENT_VALUE_UNDERRUN   "underrun" // from Thread

#endif // ANDROID_MEDIA_MEDIAMETRICSCONSTANTS_H