# rocDecode

rocDecode is a high performance video decode SDK for AMD GPUs. rocDecode API lets developers access the video decoding features available on the GPU.

## Supported Codecs

* H.265 (HEVC) - 8 bit, and 10 bit

## Prerequisites

* Linux distribution
  + Ubuntu - `20.04` / `22.04`
  + RHEL - `8` / `9`
  + SLES - `15-SP4`

* [ROCm supported hardware](https://rocm.docs.amd.com/en/latest/release/gpu_os_support.html)

### To install package

* [ROCm 6.1.0 or later](https://rocm.docs.amd.com/projects/install-on-linux/en/latest/how-to/native-install/index.html) - Follow below steps from the installation via native package manager on ROCm installation documentation
  * Registering repositories
  * Register kernel-mode driver
  * Register ROCm packages
  * Install kernel driver

### To build from source

* Install [ROCm 6.1.0 or later](https://rocmdocs.amd.com/en/latest/deploy/linux/installer/install.html) with `--usecase=multimediasdk,rocm --no-32`

* CMake `3.5` or later

**NOTE:** Ubuntu 22.04 - Install `libstdc++-12-dev`
```shell
sudo apt install libstdc++-12-dev
```

#### Prerequisites setup script for Linux
For the convenience of the developer, we provide the setup script [rocDecode-setup.py](rocDecode-setup.py) which will install all the dependencies required by this project.

**Usage:**
```shell
  python rocDecode-setup.py  --rocm_path [ ROCm Installation Path - optional (default:/opt/rocm)]
                             --developer [ Setup Developer Options - optional (default:ON) [options:ON/OFF]]
```
**NOTE:** This script only needs to be executed once.

## Build and Install instructions

### Package install
Install rocDecode runtime, development, and test packages. Runtime package - `rocdecode` only provides the rocdecode library `librocdecode.so`, development package `rocdecode-dev`/`rocdecode-devel` provides the library, header files, and samples. `rocdecode-test` package provides ctest to verify installation. Package install will auto install all dependencies.

* Install packages on `Ubuntu`
```shell
sudo apt install rocdecode rocdecode-dev rocdecode-test
```
    
* Install packages on `RHEL` / `SLES`
```shell
sudo yum install rocdecode rocdecode-devel rocdecode-test
```

### Source build and install

```shell
git clone https://github.com/ROCm/rocDecode.git
cd rocDecode
mkdir build && cd build
cmake ../
make -j8
sudo make install
```

* run tests - Requires `FFMPEG` dev install

  ```shell
  make test
  ```
  **NOTE:** run tests with verbose option `make test ARGS="-VV"`

* make package
  
  ```shell
  sudo make package
  ```

## Verify Installation

The installer will copy

* Libraries into `/opt/rocm/lib`
* Header files into `/opt/rocm/include/rocdecode`
* Samples folder into `/opt/rocm/share/rocdecode`
* Documents folder into `/opt/rocm/share/doc/rocdecode`

Build and run sample

```shell
mkdir rocdecode-sample && cd rocdecode-sample
cmake /opt/rocm/share/rocdecode/samples/videoDecode/
make -j8
./videodecode -i /opt/rocm/share/rocdecode/video/AMD_driving_virtual_20-H265.mp4
```
**NOTE:** FFMPEG dev install required to run samples

## Samples

The tool provides a few samples to decode videos [here](samples/). Please refer to the individual folders to build and run the samples.

### Sample Prerequisites

* [FFMPEG](https://ffmpeg.org/about.html) - required to run sample applications & make test

  * On `Ubuntu`
  ```shell
  sudo apt install ffmpeg libavcodec-dev libavformat-dev libavutil-dev
  ```
  * On `RHEL`/`SLES` - install ffmpeg development packages manually or use `rocDecode-setup.py` script

## Docker

Docker files to build rocDecode containers are available [here](docker/)

## Documentation

Run the steps below to build documentation locally.

* Sphinx
```shell
cd docs
pip3 install -r sphinx/requirements.txt
python3 -m sphinx -T -E -b html -d _build/doctrees -D language=en . _build/html
```

* Doxygen
```shell
doxygen .Doxyfile
```

## Tested configurations

* Linux distribution
  * Ubuntu - `20.04` / `22.04`
  * RHEL - `8` / `9`
  * SLES - `15-SP4`
* ROCm:
  * rocm-core - `5.6.1.50601-93`
  * amdgpu-core - `1:5.6.50601-1649308`
* FFMPEG - `4.2.7` / `4.4.2-0`
* rocDecode Setup Script - `V1.4`