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[readme] Add Readme for Kodi Steam Link port
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garbear authored and eigendude committed Mar 23, 2017
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[![Build Status](https://travis-ci.org/xbmc/xbmc.svg?branch=master)](https://travis-ci.org/xbmc/xbmc)
[![Documentation](https://codedocs.xyz/xbmc/xbmc.svg)](https://codedocs.xyz/xbmc/xbmc/)

![Kodi logo](https://raw.githubusercontent.com/xbmc/xbmc-forum/master/xbmc/images/logo-sbs-black.png)
# Kodi Home Theater Software

**Welcome to Kodi!**

Kodi is an award-winning free and open source (GPL) software media player and
entertainment hub for digital media. Kodi is available for multiple platforms.
Created in 2003 by a group of like minded programmers, Kodi is a non-profit
project run and developed by volunteers located around the world.
More than 450 software developers have contributed to Kodi to date, and 100-plus
translators have worked to expand its reach, making it available in more
than 65 languages.

While Kodi functions very well as a standard media player application for your
computer, it has been designed to be the perfect companion for your HTPC.
Supporting an almost endless range of remote controls, and combined with its
beautiful interface and powerful skinning engine, Kodi feels very natural to
use from the couch and is the ideal solution for your home theater.

Currently Kodi can be used to play almost all popular audio and video formats
around. It was designed for network playback, so you can stream your multimedia
from anywhere in the house or directly from the internet using practically any
protocol available.

Use your media as-is: Kodi can play CDs and DVDs directly
from the disk or image file, almost all popular archive formats from your hard
drive, and even files inside ZIP and RAR archives. It will even scan all of
your media and automatically create a personalized library complete with box
covers, descriptions, and fanart. There are playlist and slideshow functions, a
weather forecast feature and many audio visualizations. Once installed, your
computer will become a fully functional multimedia jukebox.
# Kodi on the Steam Link

This repo contains the Steam Link port of Kodi.

## Installation

See [docs/README.xxx] (https://github.com/xbmc/xbmc/tree/master/docs) for specific platform build information.
1. Download the latest release from https://github.com/garbear/kodi-steamlink/releases.
2. Copy archive to the folder `steamlink/apps/` on a USB drive (FAT32 or EXT4).
3. Insert the drive into the Steam Link and power-cycle. It will take approximately 2 minutes to install the 80MB archive.
4. When the Steam Link boots, Kodi should appear on the home screen.

## Quick Kodi development links
## Building Kodi

* [Contributing] (https://github.com/xbmc/xbmc/blob/master/CONTRIBUTING.md)
* [Submitting a patch] (http://kodi.wiki/view/HOW-TO_submit_a_patch)
* [Code guidelines] (https://codedocs.xyz/xbmc/xbmc/code_guidelines.html)
* [Kodi development] (http://kodi.wiki/view/Development)
To build Kodi, follow the steps at: https://github.com/ValveSoftware/steamlink-sdk/tree/master/examples/kodi

## Useful links
## Debugging

* [Kodi wiki] (http://kodi.wiki/)
* [Kodi bug tracker] (http://trac.kodi.tv)
* [Kodi community forums] (http://forum.kodi.tv/)
* [Kodi website] (http://kodi.tv)
Kodi may crash when launched from the Steam Link homescreen due to a PulseAudio conflict. Until this is fixed, Kodi must be run from the command line.

**Enjoy Kodi and help us improve it today. :)**
#### Enable SSH

1. Create a non-empty file on the USB drive at `steamlink/config/system/enable_ssh.txt`
2. Insert the drive and power on the Steam Link
3. SSH into the Steam Link as root using an SSH client, e.g. `ssh [email protected]`
4. The password is `steamlink`

#### Changing Steam Link builds

If you need to test Kodi on a build different from the latest public beta, follow these steps:

1. Place the build number (e.g. `600`) in a text file on a USB drive at `steamlink/config/system/update_branch.txt`
2. Insert the drive and power on the Steam Link

To revert back to the latest public beta build:

1. Place the word `beta` in a text file on a USB drive at `steamlink/config/system/update_branch.txt`
2. Insert the drive and power on the Steam Link

#### Kill the Steam Link launcher and launch Kodi

If you are on the **public build (566)**, enter the commands:

```bash
killall powermanager.sh powermanager app_run.sh shell

cd /home/apps/kodi && ./kodi.sh
```

If you are on the **beta build (597 or later)**, enter the commands:

```bash
killall powermanager.sh powermanager shell.sh shell

cd /home/apps/kodi && ./kodi.sh
```

#### Viewing the log

If you launched Kodi from the **Steam Link launcher**, use the command:

```bash
tail -F /home/apps/kodi/.home/.kodi/temp/kodi.log
```

If you launched Kodi from the **command line**, use the command:

```bash
tail -F /home/steam/.kodi/temp/kodi.log
```

#### Remote debugging via GDB

To get a stack trace, run `gdbserver` on the Steam Link and connect via local `gdb`. This is explained here: https://github.com/ValveSoftware/steamlink-sdk

`build_steamlink.sh` can be modified to make this easier. See [this commit](https://github.com/garbear/steamlink-sdk/commit/kodi-debug%5E) and [this commit](https://github.com/garbear/steamlink-sdk/commit/kodi-debug).

Before building Kodi, modify the startup script to run `gdbserver`. Find the line with the Kodi command and prefix it with `gdbserver :8080 ` like [this](https://github.com/garbear/kodi-steamlink/commit/steamlink-gdb).

#### Debugging locally using Valgrind

To track down a memory corruption bug, perform a "depends" build of Kodi. This will use the same libraries as the Steam Link instead of relying on system libraries.

First, create a writable folder `/opt/kodi-deps`. Then clone this repo and run:

```bash
cd tools/depends
./bootstrap
./configure --with-toolchain=/usr --prefix=/opt/kodi-deps --host=x86_64-linux-gnu
make
cd ../..
```

Before compiling Kodi, modify the startup script to launch Kodi under Valgrind. You should prefix the Kodi command with `valgrind --leak-check=yes ` like [this](https://github.com/garbear/kodi-steamlink/commit/steamlink-valgrind).

Next, compile Kodi via CMake:

```bash
mkdir build
cd build
/opt/kodi-deps/x86_64-linux-gnu-native/bin/cmake \
-DCMAKE_BUILD_TYPE=Debug \
-DCMAKE_TOOLCHAIN_FILE=/opt/kodi-deps/x86_64-linux-gnu/share/Toolchain.cmake \
-DCMAKE_INSTALL_PREFIX=$HOME/kodi-steamlink \
../project/cmake
make
make install
```

You can substitute the installation folder (`$HOME/kodi-steamlink`) for a prefix of your choice.

Finally, run the resulting startup script at `$HOME/kodi-steamlink/bin/kodi`.

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