HD Audio 1.1 Overview David Flenniken Software Design Engineer Windows Media Devices Group uaa @...

HD Audio 1.1 OverviewHD Audio 1.1 Overview

David FlennikenSoftware Design EngineerWindows Media Devices Groupuaa @ microsoft.comMicrosoft Corporation

Soccer LiuSoftware Design EngineerWindows Media Devices Groupuaa @ microsoft.comMicrosoft Corporation

Session OutlineSession Outline

HD Audio Codec Configurability

Role of the Topology Parser

How the Topology Parser works

Programming Pin Configuration Registers

Common Device Experience

Validating Pin Configuration

HD Audio Codec ConfigurabilityHD Audio Codec Configurability

High Definition Audio Codec

ConfigurationConfigurationDefault Setting 1Default Setting 1

ConfigurationConfigurationDefault Setting 2Default Setting 2

Role of Topology ParserRole of Topology Parser

HD Audio Codec

Provided by

IHV and ODM

Microsoft

HD Audio Class Driver 3rd

Party HD Audio Driver

Codec C specific Knowledge Topology Parser (static lib)

HD Audio Codec

HD Audio Codec

How HD Audio Class Driver Solve This ProblemHow HD Audio Class Driver Solve This Problem

Microsoft develops a HD Audio Topology Parser that handles HD audio codec’s topology parsing for all HD Audio specification compliant codecs

HD Audio Class Driver 1.1 statically links to Topology Parser lib to solve topology parsing issues

What Parser DoesWhat Parser Does

Topology Parser

Pin’s Configuration Default Settings

INPUTS

Outputs: Logical Devices

Wid 7 Wid 6 Wid 8

Headphone Device

Wid 7 Wid 6 Wid 8

MicIn Device

SPDIF Out

Wid 9 Wid 10

Wid 3 Wid 4 Wid 5

Wid 3 Wid 4 Wid 5

Wid 3 Wid 4 Wid 5

Multichannel Render

Wid 7 Wid 8

Spdif In

Parser DDI

Parser DDI

Codec Widget information (capability, connection list)

3rd Party IHVs Can Also Use Topology Parser3rd Party IHVs Can Also Use Topology Parser

3rd party driver can take advantage of Topology Parser by linking to this static library to replace their own parsing logics to simplify driver code

This Topology Parser will be released in the form of a static library. Its DDI is planned to be published when HD Audio Class Driver shipped in late 2005.

Role of Topology ParserRole of Topology Parser

HD Audio Codec

3rd

Party HD Audio Driver HD Audio Class Driver 3rd

Party HD Audio Driver

Codec C specific Knowledge Topology Parser (static lib) Topology Parser (static lib)

HD Audio Codec

HD Audio Codec

Provided by

IHV and ODM

Microsoft

How Topology Parser Works?How Topology Parser Works?

Enumerate all audio paths

Build Association list

Enumerate all Pin Path Combinations for each association

Prioritize combinations found

Pick the best Association Resource Mapping

Resource Widgets Pin Widgets

HD

Au

dio

Lin

k

Dac Widget 5

Dac Widget 6

Dac Widget 8

Adc Widget 9

Adc Widget B

Widget C

Widget A

Widget F

Line out Pin Widget 10



Mic In Widget 15

Line In Pin Widget 14

Vendor specfic widget type (16)

Widget E

Widget 17

Aux In Pin Widget 13 (No physical

connection)

Widget D

Dac Widget 7


Adc Widget 19

Sample HD Audio Codec

Enumerate All Audio PathsEnumerate All Audio Paths

Audio path: a path that audio data could flow through starting at a resource widget and ending at a pin widget

Not all the possible paths are valid. There are rules set by parser for what an invalid audio path is.

Invalid audio paths:Paths including loop

Paths including Vendor Defined Widget

Paths ending with a pin widget that has no physical connection

Output audio paths ending with input Pin

Input audio paths ending with output Pin

Paths contains widgets sitting between resource widget and HD Audio Link

Paths do not end with a pin widget


HD

Au

dio

Lin

k

Dac Widget 5

Dac Widget 6

Dac Widget 8

Adc Widget 9

Adc Widget B

Widget C

Widget A

Widget F




Mic In Widget 15



Widget E

Widget 17

Path including loop

Widget in wrong location

Path not ending with pin widget


connection)

Widget D

Input path ends with output pin

Dac Widget 7


Output path ends with input pin

Adc Widget 19

No Vendor Defined Widget Support

No physical connect on pin


Valid Audio Paths FoundValid Audio Paths Found

Dac Widget 5 Widget CLine out Pin Widget 10

Dac Widget 5 Widget CLine out Pin Widget 11

Dac Widget 5 Widget DLine out Pin Widget 10




Dac Widget 6 Widget D Line out Pin Widget 18

Widget E

Dac Widget 7 Line out Pin Widget 18

Widget E

Adc Widget 19


Adc Widget BLine In Pin Widget 14

Path 1

Path 2

Path 3

Path 4

Path 5

Path 6

Path 7

Path 8

Path 9

Path 10

Build Association ListBuild Association List

Zero is not a valid Association Default number (Pin 15)

00Mic In Pin Widget 15

04Line In Pin Widget 14

03Widget 13

02Line Out Pin Widget 12




Sequence Number

Association Default

Pin Widget

00In Pin Widget 15

04Line In Pin Widget 14

03Widget 13





Sequence Number

Association Pin Widget

Association List Generated

Line Out Pin Widget 10


Association 1



Association 2

Widget 13

Association 3


Association 4

Enumerate All Pin Path Combinations for Enumerate All Pin Path Combinations for Each AssociationEach Association

Association 1 Pin 10 Path 5 (6-D-10)Pin 11 Path 2 (5-C-11)Pin 18 Path 8 (7–E-18)

Association 4 Pin 14 Path 10 (19-14)

Association 1 Pin 10 Path 1 (5-C-10)Pin 11 Path 6 (6-D-11)Pin 18 Path 8 (7-E-18)

Association 4 Pin 14 Path 9 (B-14)

Association 1 Pin 10 Path 5 (6-D-10)Pin 11 Path 2 (5-C-11)Pin 18 Path 8 (7–E-18)



Association 4 Pin 14 Path 10 (19-14)

Prioritize Prioritize Combinations FCombinations Foundound

Base on a set of predefined rules to give each path the appropriate weight. Set the sum of weighted priority value to each Association Resource Mapping.

The rules are:The lower the association number, the higher its priority

Known device types have higher priority than unknown device types

A path with a wider volume control range has higher priority

1`

Pick the Best Association Pick the Best Association Resource Mapping

The highest sum of all weighted paths and associations will be chosen as the best Association Resource Mapping for final output.




HD

Au

dio

Lin

k

Dac Widget 5

Dac Widget 6

Dac Widget 8

Adc Widget 9

Adc Widget B

Widget C

Widget A

Widget F




Mic In Widget 15



Widget E

Widget 17


connection)

Widget D

Dac Widget 7


Adc Widget 19


Logical Device 1Resource Widgets

HD

Au

dio

Lin

k

Dac Widget 5

Dac Widget 6

Adc Widget B

Widget C

Widget E

Widget D

Dac Widget 7

Parser Output

Logical Device 4





Use of Parser OutputUse of Parser Output

The Class Driver uses the parser's output to program widget connections and settings

For each logical device, class driver builds a Windows Kernel Streaming filter to expose its audio functionality to system

Programming Pin Configuration RegistersProgramming Pin Configuration Registers

The Microsoft Topology Parser relies on spec compliant HD Audio codecs

Follows Microsoft UAA “Pin Configuration Guidelines for High Definition Audio Devices” to ensure proper Pin Configuration Default settings

Detailed Pin Configuration register fields Detailed Pin Configuration register fields

FieldsPort Connectivity

Location

Default Device

Connection Type

Color

Misc.

Default Association

Sequence

PortPort Connectivity Field Connectivity Field

Used to indicate existenceThe Pin Widget can be either an external Jack or a fixed function device (like internal speakers) or it can be unconnected

0x1 means no physical connection

The Class Driver ignores Pin Widgets with this value set to 0x1

Location FieldLocation Field

Denotes Physical location of the Pin WidgetSet as appropriate

The Class Driver uses this information to describe the jack location to the end user

Default Device FieldDefault Device Field

The Class Driver uses Default Device field to determine what Logical Device to create

The Class Driver recognizes the following:Line Out, Speaker, HP Out, S/P-DIF Out, Line In, Mic In, CD, Aux and S/P-DIF In

Other devices supported by the parserDigital Other Out and Digital Other In

Not currently supportedModem Line Side, Modem Headset Side, Telephony, and Other

Interpretations and ClarificationsInterpretations and Clarifications

Specific Widget typesLine out - No build-in amplifier on the codec

Speaker - No build-in amplifier on the codec, but there is an external amp connected.

HP Out – There is a programmable build-in amplifier on the codec that can drive headphones. If the amp is turned off, the Pin acts like a Line Out pin (above)

Connection Type FieldConnection Type Field

Set as appropriate

Largely ignored by the Class Driver

Color FieldColor Field

16 possibilities – use them

Colors should be unique to each location

Pin with internal location should be set to color unknown (0x0)

The Class Driver uses this in it’s description of the jacks to the end user

Misc. FieldMisc. Field

Jack Detect Override0 means enabled

System must provide “Audio Jack Detection Circuits” before setting to 0.

1 means override (disabled)

This field should be enabled to empower dynamic device functionality

Default Association FieldDefault Association Field

Labels the priority of the Pin WidgetLower numbers mean higher priority

Association 0 is invalid

0xF means the pin is not associated to any other pin

The Class Driver uses this field to:Indicate groupings for multi-pin logical devices

Resolve resource disputes (higher priority device wins)

Sequence FieldSequence Field

Orders pins in an association

All sequence numbers in an association must be unique

The Class Driver generally uses this field to determine how to map channels in a multi-channel device.

Sequence Number MeaningsSequence Number Meanings

Ordering in HD Audio Spec 1.0Location information is missing

The Class Driver assigns meanings for clarity0 means Front Left & Front Right

1 means Front Center & Low frequency

2 means Back Left & Back Right

3 means Front Left of Center & Front Right of Center

4 means Side Left & Side Right

Special meanings (examples)(0,2) or (0,4) means Quadraphonic

(0,1,2) means Surround Sound Speakers

(0,1,2,4) means Home Theater Speakers

See Pin Config Guidelines for more info

Common Device ExperienceCommon Device Experience

SupportedRender

Line out, Speaker, Headphone and S/P-DIF Out

CaptureMicrophone, LineIn, CDIn, AuxIn and S/P-DIF In

Not SupportedDigital Other Out, Modem Line Side, Modem Handset side, Telephony, Digital Other In or Other (or Reserved)

Render DeviceRender Device

Can’t mix Line Out widgets and Speaker widgets in the same association

Generally, there are 1 to 4 pins in a render logical device association

Sequence numbers determine channel mapping

Single pin render devicesHeadphone

Line out

Speaker

Single Pin DevicesSingle Pin Devices

S/P-DIF Out DeviceNo analog functionality on audio path

Line In Device

Aux In Device

CD Device

S/P-DIF In Device

Microphone Device

Multi Purpose DevicesMulti Purpose Devices

Muxed Capture DeviceA collection of mutually exclusive input devices that share the same ADC

Mixed Capture DeviceA collection of devices that share the same ADC that may work at the same time

Redirected Headphone Render DeviceCombination render + headphone device where when the headphone is plugged in the output is redirected from the speakers to the headphone

Validate Pin ConfigurationsValidate Pin Configurations

Parser relies on the Pin Configuration Default for successful parsing – getting them set right is very important

Use UAATest.exeIt validates Pin Configuration Default settings

It exercises the same parser logics to validate codecs and exposes audio paths

UAATest also checks HD Audio Spec compliance

Let Microsoft know about inconsistencies (or issues with the output)

Call to ActionCall to Action

Use Microsoft Topology Parser to simplify and unify yours HD Audio device driver support

Follow guidelines in “Pin Configuration Guidelines for High Definition Audio Devices” for HD Audio Codec Pin Configuration Default programming

Help your OEM/ODM customers expose parser supported device types through system BIOS programming of HD Audio Pin Configuration Default values

Build UAA class driver compatible HD Audio solutions

Additional ResourcesAdditional Resources

Email uaa @ microsoft.com forMicrosoft UAA Pin Configuration Guidelines for High Definition Audio Devices, Release date TBD

UAA Hardware Design Guideline White Paper

UAATest.exe

Microsoft UAA overview white paper onhttp://www.microsoft.com/whdc/device/audio/uaa.mspx

http://www.microsoft.com/whdc/device/audio/uaa.mspx

http://www.microsoft.com/whdc/device/audio/uaa.mspx

HD Audio 1.1 Overview David Flenniken Software Design Engineer Windows Media Devices Group uaa @...

Documents

Transcript of HD Audio 1.1 Overview David Flenniken Software Design Engineer Windows Media Devices Group uaa @...