Choosing an Input Jack - Lurker's Guide - lurkertech.com
lurkertech.com Lurker's Guide Choosing an Input Jack

Support This SiteI created this site and made it available free to all readers. If you have found it helpful or amusing, please support the effort, and future updates, in one of these ways:
donate now   Donate Now
Use your credit card or PayPal to donate in support of the site.
get anything from amazon.com
Use this link to Amazon—you pay the same, I get 4%.
get my thai dictionary app
Learn Thai with my Talking Thai-English-Thai Dictionary app: iOS, Android, Windows.
get my thai phrasebook app
Experience Thailand richly with my Talking Thai-English-Thai Phrasebook app.
get my chinese phrasebook app
Visit China easily with my Talking Chinese-English-Chinese Phrasebook app.
get thailand fever
I co-authored this bilingual cultural guide to Thai-Western romantic relationships.
Support This Site

I created this site and made it available free to all readers. If you have found it helpful or amusing, please support the effort, and future updates, in one of these ways:
donate now   Donate Now
Use your credit card or PayPal to donate in support of the site.
get anything from amazon.com
Use this link to Amazon—you pay the same, I get 4%.
get my thai dictionary app
Learn Thai with my Talking Thai-English-Thai Dictionary app: iOS, Android, Windows.
get my thai phrasebook app
Experience Thailand richly with my Talking Thai-English-Thai Phrasebook app.
get my chinese phrasebook app
Visit China easily with my Talking Chinese-English-Chinese Phrasebook app.
get thailand fever
I co-authored this bilingual cultural guide to Thai-Western romantic relationships.

Submit This SiteLike what you see?
Help spread the word on social media:
Submit This Site

Like what you see?
Help spread the word on social media:

Note: Updated Lurker's Guide available (but not this page!)

This page belongs to the old 1990s SGI Lurker's Guide. As of 2008, several of the Lurker's Guide pages have been updated for HDTV and for modern OS platforms like Windows and Mac. This particular page is not one of those, but you can see what new stuff is available here. Thanks!

Choosing an Input Jack

By Chris Pirazzi and Micheal Portuesi.

This document tells you what you need to know to select a particular input jack for a VL_VIDEO source node. Unfortunately, the VL provides no simple device-independent scheme for doing this, but instead exposes hardware architectures directly.

We will tell you how to pick a single jack on a single device. Each piece of hardware offers totally different and unusual constraints on which jacks can be used by different VL_VIDEO source nodes simultaneously, and this lore is currently beyond the scope of this document. A hint: some of this complexity is directly exposed in the VL controls you use to choose jacks, and some of it is not. None of it is documented.

At first, we tried to organize this document by presenting the relevant VL controls, and then trying to come up with some sensible definition for each which make it obvious how to select any particular jack. This rapidly became futile.

Instead, we offer a more pragmatic approach:

To learn about input jack selection, first read the comments in ij.h, and then if you dare, check out the code in ij.c.

Warning: this version of the code has not been tested for all jacks for all devices. So far, we have verified that VL path setup succeeds for all jacks for all devices, but we haven't done a complete test with an input signal for all of those cases.

This version of ij does not support divo.

Support This SiteI created this site and made it available free to all readers. If you have found it helpful or amusing, please support the effort, and future updates, in one of these ways:
donate now   Donate Now
Use your credit card or PayPal to donate in support of the site.
get anything from amazon.com
Use this link to Amazon—you pay the same, I get 4%.
get my thai dictionary app
Learn Thai with my Talking Thai-English-Thai Dictionary app: iOS, Android, Windows.
get my thai phrasebook app
Experience Thailand richly with my Talking Thai-English-Thai Phrasebook app.
get my chinese phrasebook app
Visit China easily with my Talking Chinese-English-Chinese Phrasebook app.
get thailand fever
I co-authored this bilingual cultural guide to Thai-Western romantic relationships.
CopyrightAll text and images copyright 1999-2017 Chris Pirazzi unless otherwise indicated.
Support This Site

I created this site and made it available free to all readers. If you have found it helpful or amusing, please support the effort, and future updates, in one of these ways:
donate now   Donate Now
Use your credit card or PayPal to donate in support of the site.
get anything from amazon.com
Use this link to Amazon—you pay the same, I get 4%.
get my thai dictionary app
Learn Thai with my Talking Thai-English-Thai Dictionary app: iOS, Android, Windows.
get my thai phrasebook app
Experience Thailand richly with my Talking Thai-English-Thai Phrasebook app.
get my chinese phrasebook app
Visit China easily with my Talking Chinese-English-Chinese Phrasebook app.
get thailand fever
I co-authored this bilingual cultural guide to Thai-Western romantic relationships.
Copyright

All text and images copyright 1999-2017 Chris Pirazzi unless otherwise indicated.