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Garionion 2022-02-06 00:34:05 +01:00
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1
.envrc Normal file
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use flake

92
.gitignore vendored Normal file
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assets
### JetBrains template
# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
# User-specific stuff
.idea/**/workspace.xml
.idea/**/tasks.xml
.idea/**/usage.statistics.xml
.idea/**/dictionaries
.idea/**/shelf
# Generated files
.idea/**/contentModel.xml
# Sensitive or high-churn files
.idea/**/dataSources/
.idea/**/dataSources.ids
.idea/**/dataSources.local.xml
.idea/**/sqlDataSources.xml
.idea/**/dynamic.xml
.idea/**/uiDesigner.xml
.idea/**/dbnavigator.xml
# Gradle
.idea/**/gradle.xml
.idea/**/libraries
# Gradle and Maven with auto-import
# When using Gradle or Maven with auto-import, you should exclude module files,
# since they will be recreated, and may cause churn. Uncomment if using
# auto-import.
# .idea/artifacts
# .idea/compiler.xml
# .idea/jarRepositories.xml
# .idea/modules.xml
# .idea/*.iml
# .idea/modules
# *.iml
# *.ipr
# CMake
cmake-build-*/
# Mongo Explorer plugin
.idea/**/mongoSettings.xml
# File-based project format
*.iws
# IntelliJ
out/
# mpeltonen/sbt-idea plugin
.idea_modules/
# JIRA plugin
atlassian-ide-plugin.xml
# Cursive Clojure plugin
.idea/replstate.xml
# Crashlytics plugin (for Android Studio and IntelliJ)
com_crashlytics_export_strings.xml
crashlytics.properties
crashlytics-build.properties
fabric.properties
# Editor-based Rest Client
.idea/httpRequests
# Android studio 3.1+ serialized cache file
.idea/caches/build_file_checksums.ser
### Go template
# Binaries for programs and plugins
*.exe
*.exe~
*.dll
*.so
*.dylib
# Test binary, built with `go test -c`
*.test
# Output of the go coverage tool, specifically when used with LiteIDE
*.out
# Dependency directories (remove the comment below to include it)
# vendor/

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package api
import (
"context"
"fmt"
"git.entr0py.de/garionion/gstreamer-graphix/gstreamer"
"github.com/google/uuid"
"github.com/rs/zerolog/log"
"sync"
"time"
)
type PipelineService struct {
pipelineSlots map[string][]string
pipelineslotmapping map[string]string
UnimplementedPipelineServiceServer
*gstreamer.Gstreamer
Font, FontWeight string //default font
FontSize int // Fontsize 0 does not make sense
Context context.Context
sync.RWMutex
}
func (s *PipelineService) UpdatePipeline(ctx context.Context, updates *PipelineUpdates) (*PipelineUpdateResponse, error) {
pipeline, err := s.Gstreamer.GetPipeline(updates.Id.GetId())
if err != nil {
log.Error().Str("ID", updates.Id.GetId()).Err(err)
} else {
overlays := s.convertRPCOverlayToGstreamerOverlay(updates.GetOverlays())
s.Lock()
pipeline.PipelineUpdates <- gstreamer.PipelineUpdates{Overlays: overlays}
s.Unlock()
}
return &PipelineUpdateResponse{PipelineId: &PipelineID{Id: updates.Id.GetId()}}, nil
}
func (s *PipelineService) StopPipeline(ctx context.Context, id *PipelineID) (*PipelineStopResponse, error) {
pipeline, err := s.Gstreamer.GetPipeline(id.GetId())
if err != nil {
log.Error().Str("ID", id.GetId()).Err(err)
} else {
pipeline.Lock()
err = pipeline.Stop()
pipeline.Unlock()
}
return &PipelineStopResponse{PipelineId: &PipelineID{Id: id.GetId()}}, err
}
func (s *PipelineService) StartPipeline(ctx context.Context, id *PipelineID) (*PipelineStartResponse, error) {
pipeline, err := s.Gstreamer.GetPipeline(id.GetId())
if err != nil {
log.Error().Str("ID", id.GetId()).Err(err)
} else {
pipeline.Lock()
err = pipeline.Start()
pipeline.Unlock()
}
return &PipelineStartResponse{PipelineId: &PipelineID{Id: id.GetId()}}, err
}
func (s *PipelineService) DeletePipeline(ctx context.Context, id *PipelineID) (*PipelineDeleteResponse, error) {
go s.Gstreamer.DeletePipeline(id.GetId())
if slot, ok := s.pipelineslotmapping[id.GetId()]; ok {
s.Lock()
delete(s.pipelineslotmapping, id.GetId())
var i int
for i := range s.pipelineSlots[slot] {
if s.pipelineSlots[slot][i] == id.GetId() {
break
}
}
s.pipelineSlots[slot] = append(s.pipelineSlots[slot][:i], s.pipelineSlots[slot][i+1:]...)
s.Unlock()
}
return &PipelineDeleteResponse{PipelineId: &PipelineID{Id: id.GetId()}}, nil
}
func (s *PipelineService) CreatePipeline(ctx context.Context, pipeline *Pipeline) (*PipelineCreationResponse, error) {
uid, _ := uuid.NewRandom()
id := uid.String()
gstreamerPipeline := &gstreamer.Pipeline{
Name: pipeline.GetName(),
ID: id,
InputElement: gstreamer.InputElement{
Name: fmt.Sprintf("%s-input", pipeline.GetName()),
Type: "filesrc",
Properties: map[string]string{
"location": pipeline.GetClip(),
},
},
OutputElement: gstreamer.OutputElement{
Name: fmt.Sprintf("%s-output", pipeline.GetName()),
Type: pipeline.GetOutput(),
},
}
gstreamerPipeline.Overlays = s.convertRPCOverlayToGstreamerOverlay(pipeline.Overlay)
gstreamerPipeline.Create()
s.Lock()
if _, ok := s.pipelineSlots[pipeline.GetName()]; ok {
s.pipelineSlots[pipeline.GetName()] = append(s.pipelineSlots[pipeline.GetName()], id)
} else {
s.pipelineSlots[pipeline.GetName()] = []string{id}
}
s.pipelineslotmapping[id] = pipeline.GetName()
s.Unlock()
return &PipelineCreationResponse{
PipelineId: &PipelineID{Id: id},
}, nil
}
func (s *PipelineService) convertRPCOverlayToGstreamerOverlay(apiOverlays []*Overlay) map[string]gstreamer.Overlay {
gstreamerOverlays := map[string]gstreamer.Overlay{}
for _, overlay := range apiOverlays {
switch overlay.GetOverlayData().(type) {
case *Overlay_Extra:
log.Error().Msgf("Extra Element not implemented, used by overlay %s", overlay.GetName())
case *Overlay_ImageOverlay:
o := overlay.GetImageOverlay()
imageOverlay := &gstreamer.ImageOverlay{
Name: overlay.GetName(),
Path: o.GetPath(),
X: int(overlay.GetX()),
Y: int(overlay.GetY()),
Display: overlay.GetDisplay(),
BlendIn: time.Duration(overlay.GetBlendIn()),
BlendOut: time.Duration(overlay.GetBlendOut()),
}
gstreamerOverlays[overlay.GetName()] = imageOverlay
case *Overlay_TextOverlay:
o := overlay.GetTextOverlay()
if o.GetText() == "" {
continue
}
font := s.Font
if o.GetFontName() != "" {
font = o.GetFontName()
}
fontsize := s.FontSize
if o.GetFontSize() != 0 {
fontsize = int(o.GetFontSize())
}
fontweight := s.FontWeight
if o.GetFontWeight() != "" {
font = o.GetFontWeight()
}
textOverlay := &gstreamer.TextOverlay{
Name: overlay.GetName(),
X: int(overlay.GetX()),
Y: int(overlay.GetY()),
Font: font,
FontSize: fontsize,
FontWeight: fontweight,
Color: o.GetFontColor(),
Value: o.GetText(),
Display: overlay.GetDisplay(),
MaxWidth: uint(o.GetMaxWidth()),
BlendIn: time.Duration(overlay.GetBlendIn()),
BlendOut: time.Duration(overlay.GetBlendOut()),
}
gstreamerOverlays[overlay.GetName()] = textOverlay
}
}
return gstreamerOverlays
}

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syntax = "proto3";
option go_package = "./api";
package api;
message Pipeline {
string name = 1;
string clip = 2;
string output = 3;
repeated Overlay overlay = 4;
}
message Overlay {
string name = 1;
int64 x = 2;
int64 y = 3;
bool display = 4;
int64 blend_in = 5;
int64 blend_out = 6;
oneof overlay_data {
ExtraOverlay extra = 7;
TextOverlay text_overlay = 8;
ImageOverlay image_overlay = 9;
}
}
message ExtraOverlay {
map<string, string> properties = 1;
}
message ImageOverlay {
int64 x = 2;
int32 y = 3;
string path = 7;
}
message TextOverlay {
string name = 1;
int64 x = 2;
int64 y = 3;
string text = 4;
uint64 font_size = 5;
string font_name = 6;
string font_weight = 7;
uint32 font_color = 8;
uint64 max_width = 9;
}
message PipelineCreationResponse {
PipelineID pipeline_id = 1;
}
message PipelineUpdates {
PipelineID id = 1;
repeated Overlay overlays = 2;
}
message PipelineID {
string id = 1;
}
message PipelineUpdateResponse {
PipelineID pipeline_id = 1;
}
message PipelineStartResponse {
PipelineID pipeline_id = 1;
}
message PipelineStopResponse {
PipelineID pipeline_id = 1;
}
message PipelineDeleteResponse {
PipelineID pipeline_id = 1;
}
service PipelineService {
rpc CreatePipeline(Pipeline) returns (PipelineCreationResponse);
rpc UpdatePipeline(PipelineUpdates) returns (PipelineUpdateResponse);
rpc StartPipeline(PipelineID) returns (PipelineStartResponse);
rpc StopPipeline(PipelineID) returns (PipelineStopResponse);
rpc DeletePipeline(PipelineID) returns (PipelineDeleteResponse);
}

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// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
package api
import (
context "context"
grpc "google.golang.org/grpc"
codes "google.golang.org/grpc/codes"
status "google.golang.org/grpc/status"
)
// This is a compile-time assertion to ensure that this generated file
// is compatible with the grpc package it is being compiled against.
// Requires gRPC-Go v1.32.0 or later.
const _ = grpc.SupportPackageIsVersion7
// PipelineServiceClient is the client API for PipelineService service.
//
// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
type PipelineServiceClient interface {
CreatePipeline(ctx context.Context, in *Pipeline, opts ...grpc.CallOption) (*PipelineCreationResponse, error)
UpdatePipeline(ctx context.Context, in *PipelineUpdates, opts ...grpc.CallOption) (*PipelineUpdateResponse, error)
StartPipeline(ctx context.Context, in *PipelineID, opts ...grpc.CallOption) (*PipelineStartResponse, error)
StopPipeline(ctx context.Context, in *PipelineID, opts ...grpc.CallOption) (*PipelineStopResponse, error)
DeletePipeline(ctx context.Context, in *PipelineID, opts ...grpc.CallOption) (*PipelineDeleteResponse, error)
}
type pipelineServiceClient struct {
cc grpc.ClientConnInterface
}
func NewPipelineServiceClient(cc grpc.ClientConnInterface) PipelineServiceClient {
return &pipelineServiceClient{cc}
}
func (c *pipelineServiceClient) CreatePipeline(ctx context.Context, in *Pipeline, opts ...grpc.CallOption) (*PipelineCreationResponse, error) {
out := new(PipelineCreationResponse)
err := c.cc.Invoke(ctx, "/api.PipelineService/CreatePipeline", in, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *pipelineServiceClient) UpdatePipeline(ctx context.Context, in *PipelineUpdates, opts ...grpc.CallOption) (*PipelineUpdateResponse, error) {
out := new(PipelineUpdateResponse)
err := c.cc.Invoke(ctx, "/api.PipelineService/UpdatePipeline", in, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *pipelineServiceClient) StartPipeline(ctx context.Context, in *PipelineID, opts ...grpc.CallOption) (*PipelineStartResponse, error) {
out := new(PipelineStartResponse)
err := c.cc.Invoke(ctx, "/api.PipelineService/StartPipeline", in, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *pipelineServiceClient) StopPipeline(ctx context.Context, in *PipelineID, opts ...grpc.CallOption) (*PipelineStopResponse, error) {
out := new(PipelineStopResponse)
err := c.cc.Invoke(ctx, "/api.PipelineService/StopPipeline", in, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *pipelineServiceClient) DeletePipeline(ctx context.Context, in *PipelineID, opts ...grpc.CallOption) (*PipelineDeleteResponse, error) {
out := new(PipelineDeleteResponse)
err := c.cc.Invoke(ctx, "/api.PipelineService/DeletePipeline", in, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
// PipelineServiceServer is the server API for PipelineService service.
// All implementations must embed UnimplementedPipelineServiceServer
// for forward compatibility
type PipelineServiceServer interface {
CreatePipeline(context.Context, *Pipeline) (*PipelineCreationResponse, error)
UpdatePipeline(context.Context, *PipelineUpdates) (*PipelineUpdateResponse, error)
StartPipeline(context.Context, *PipelineID) (*PipelineStartResponse, error)
StopPipeline(context.Context, *PipelineID) (*PipelineStopResponse, error)
DeletePipeline(context.Context, *PipelineID) (*PipelineDeleteResponse, error)
mustEmbedUnimplementedPipelineServiceServer()
}
// UnimplementedPipelineServiceServer must be embedded to have forward compatible implementations.
type UnimplementedPipelineServiceServer struct {
}
func (UnimplementedPipelineServiceServer) CreatePipeline(context.Context, *Pipeline) (*PipelineCreationResponse, error) {
return nil, status.Errorf(codes.Unimplemented, "method CreatePipeline not implemented")
}
func (UnimplementedPipelineServiceServer) UpdatePipeline(context.Context, *PipelineUpdates) (*PipelineUpdateResponse, error) {
return nil, status.Errorf(codes.Unimplemented, "method UpdatePipeline not implemented")
}
func (UnimplementedPipelineServiceServer) StartPipeline(context.Context, *PipelineID) (*PipelineStartResponse, error) {
return nil, status.Errorf(codes.Unimplemented, "method StartPipeline not implemented")
}
func (UnimplementedPipelineServiceServer) StopPipeline(context.Context, *PipelineID) (*PipelineStopResponse, error) {
return nil, status.Errorf(codes.Unimplemented, "method StopPipeline not implemented")
}
func (UnimplementedPipelineServiceServer) DeletePipeline(context.Context, *PipelineID) (*PipelineDeleteResponse, error) {
return nil, status.Errorf(codes.Unimplemented, "method DeletePipeline not implemented")
}
func (UnimplementedPipelineServiceServer) mustEmbedUnimplementedPipelineServiceServer() {}
// UnsafePipelineServiceServer may be embedded to opt out of forward compatibility for this service.
// Use of this interface is not recommended, as added methods to PipelineServiceServer will
// result in compilation errors.
type UnsafePipelineServiceServer interface {
mustEmbedUnimplementedPipelineServiceServer()
}
func RegisterPipelineServiceServer(s grpc.ServiceRegistrar, srv PipelineServiceServer) {
s.RegisterService(&PipelineService_ServiceDesc, srv)
}
func _PipelineService_CreatePipeline_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(Pipeline)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(PipelineServiceServer).CreatePipeline(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/api.PipelineService/CreatePipeline",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(PipelineServiceServer).CreatePipeline(ctx, req.(*Pipeline))
}
return interceptor(ctx, in, info, handler)
}
func _PipelineService_UpdatePipeline_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(PipelineUpdates)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(PipelineServiceServer).UpdatePipeline(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/api.PipelineService/UpdatePipeline",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(PipelineServiceServer).UpdatePipeline(ctx, req.(*PipelineUpdates))
}
return interceptor(ctx, in, info, handler)
}
func _PipelineService_StartPipeline_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(PipelineID)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(PipelineServiceServer).StartPipeline(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/api.PipelineService/StartPipeline",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(PipelineServiceServer).StartPipeline(ctx, req.(*PipelineID))
}
return interceptor(ctx, in, info, handler)
}
func _PipelineService_StopPipeline_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(PipelineID)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(PipelineServiceServer).StopPipeline(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/api.PipelineService/StopPipeline",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(PipelineServiceServer).StopPipeline(ctx, req.(*PipelineID))
}
return interceptor(ctx, in, info, handler)
}
func _PipelineService_DeletePipeline_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(PipelineID)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(PipelineServiceServer).DeletePipeline(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/api.PipelineService/DeletePipeline",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(PipelineServiceServer).DeletePipeline(ctx, req.(*PipelineID))
}
return interceptor(ctx, in, info, handler)
}
// PipelineService_ServiceDesc is the grpc.ServiceDesc for PipelineService service.
// It's only intended for direct use with grpc.RegisterService,
// and not to be introspected or modified (even as a copy)
var PipelineService_ServiceDesc = grpc.ServiceDesc{
ServiceName: "api.PipelineService",
HandlerType: (*PipelineServiceServer)(nil),
Methods: []grpc.MethodDesc{
{
MethodName: "CreatePipeline",
Handler: _PipelineService_CreatePipeline_Handler,
},
{
MethodName: "UpdatePipeline",
Handler: _PipelineService_UpdatePipeline_Handler,
},
{
MethodName: "StartPipeline",
Handler: _PipelineService_StartPipeline_Handler,
},
{
MethodName: "StopPipeline",
Handler: _PipelineService_StopPipeline_Handler,
},
{
MethodName: "DeletePipeline",
Handler: _PipelineService_DeletePipeline_Handler,
},
},
Streams: []grpc.StreamDesc{},
Metadata: "api/api.proto",
}

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{ pkgs ? import <nixpkgs> { } }:
with pkgs;
mkShell {
nativeBuildInputs = [
go_1_17
gcc
gst_all_1.gstreamer
gst_all_1.gstreamer.dev
gst_all_1.gst-plugins-base
gst_all_1.gst-plugins-good
gst_all_1.gst-plugins-bad
gst_all_1.gst-plugins-ugly
pkg-config
protoc-gen-go
protoc-gen-go-grpc
protobuf
go-tools
];
}

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{
"nodes": {
"flake-utils": {
"locked": {
"lastModified": 1638122382,
"narHash": "sha256-sQzZzAbvKEqN9s0bzWuYmRaA03v40gaJ4+iL1LXjaeI=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "74f7e4319258e287b0f9cb95426c9853b282730b",
"type": "github"
},
"original": {
"owner": "numtide",
"repo": "flake-utils",
"type": "github"
}
},
"nixpkgs": {
"locked": {
"lastModified": 1642104392,
"narHash": "sha256-m71b7MgMh9FDv4MnI5sg9MiBVW6DhE1zq+d/KlLWSC8=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "5aaed40d22f0d9376330b6fa413223435ad6fee5",
"type": "github"
},
"original": {
"owner": "NixOS",
"ref": "nixos-unstable",
"repo": "nixpkgs",
"type": "github"
}
},
"root": {
"inputs": {
"flake-utils": "flake-utils",
"nixpkgs": "nixpkgs"
}
}
},
"root": "root",
"version": 7
}

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{
description = "gstreamer grafik server";
inputs = {
nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
flake-utils.url = "github:numtide/flake-utils";
};
outputs = { self, nixpkgs, flake-utils }:
flake-utils.lib.eachDefaultSystem
(system:
let pkgs = nixpkgs.legacyPackages.${system}; in
{
devShell = import ./default.nix { inherit pkgs; };
defaultPackage = import ./package.nix { inherit pkgs; inherit self; };
}
);
}

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module git.entr0py.de/garionion/gstreamer-graphix
go 1.17
require (
github.com/google/uuid v1.3.0
github.com/ilyakaznacheev/cleanenv v1.2.6
github.com/rs/zerolog v1.26.1
github.com/tinyzimmer/go-glib v0.0.24
github.com/tinyzimmer/go-gst v0.2.32
google.golang.org/grpc v1.44.0
google.golang.org/protobuf v1.27.1
)
require (
github.com/BurntSushi/toml v1.0.0 // indirect
github.com/golang/protobuf v1.5.2 // indirect
github.com/joho/godotenv v1.4.0 // indirect
github.com/mattn/go-pointer v0.0.1 // indirect
github.com/pkg/errors v0.9.1 // indirect
golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd // indirect
golang.org/x/sys v0.0.0-20220204135822-1c1b9b1eba6a // indirect
golang.org/x/text v0.3.7 // indirect
google.golang.org/genproto v0.0.0-20220204002441-d6cc3cc0770e // indirect
gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
olympos.io/encoding/edn v0.0.0-20201019073823-d3554ca0b0a3 // indirect
)

184
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cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/BurntSushi/toml v1.0.0 h1:dtDWrepsVPfW9H/4y7dDgFc2MBUSeJhlaDtK13CxFlU=
github.com/BurntSushi/toml v1.0.0/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
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github.com/rs/zerolog v1.26.1 h1:/ihwxqH+4z8UxyI70wM1z9yCvkWcfz/a3mj48k/Zngc=
github.com/rs/zerolog v1.26.1/go.mod h1:/wSSJWX7lVrsOwlbyTRSOJvqRlc+WjWlfes+CiJ+tmc=
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github.com/yuin/goldmark v1.4.0/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
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golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
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golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
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golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.1.7/go.mod h1:LGqMHiF4EqQNHR1JncWGqT5BVaXmza+X+BDGol+dOxo=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
google.golang.org/genproto v0.0.0-20200513103714-09dca8ec2884/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
google.golang.org/genproto v0.0.0-20220204002441-d6cc3cc0770e h1:hXl9hnyOkeznztYpYxVPAVZfPzcbO6Q0C+nLXodza8k=
google.golang.org/genproto v0.0.0-20220204002441-d6cc3cc0770e/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
google.golang.org/grpc v1.40.0/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
google.golang.org/grpc v1.44.0 h1:weqSxi/TMs1SqFRMHCtBgXRs8k3X39QIDEZ0pRcttUg=
google.golang.org/grpc v1.44.0/go.mod h1:k+4IHHFw41K8+bbowsex27ge2rCb65oeWqe4jJ590SU=
google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
olympos.io/encoding/edn v0.0.0-20201019073823-d3554ca0b0a3 h1:slmdOY3vp8a7KQbHkL+FLbvbkgMqmXojpFUO/jENuqQ=
olympos.io/encoding/edn v0.0.0-20201019073823-d3554ca0b0a3/go.mod h1:oVgVk4OWVDi43qWBEyGhXgYxt7+ED4iYNpTngSLX2Iw=

15
gstreamer/Decklink.go Normal file
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@ -0,0 +1,15 @@
package gstreamer
import "errors"
func (g *Gstreamer) getDecklinkOutput(name string) (string, error) {
g.Decklink.Lock()
for slot, pipelineName := range g.Decklink.Slots {
if pipelineName == "" {
g.Decklink.Slots[slot] = name
g.Decklink.Unlock()
return slot, nil
}
}
return "", errors.New("No free Decklink slot")
}

72
gstreamer/ImageOverlay.go Normal file
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package gstreamer
import (
"fmt"
"github.com/rs/zerolog"
"github.com/tinyzimmer/go-gst/gst"
"time"
)
func (o *ImageOverlay) create(log zerolog.Logger) (*gst.Element, error) {
element, err := gst.NewElementWithName("gdkpixbufoverlay", o.Name)
if err != nil {
log.Error().Msgf("could not create image overlay %s: %v\n", o.Name, err)
return nil, fmt.Errorf("could not create image overlay %s", o.Name)
}
setPropertyWrapper(element, "positioning-mode", 1) // pixels-absolute
setPropertyWrapper(element, "location", o.Path)
o.update(log)
o.element = element
return element, err
}
func (o *ImageOverlay) update(_ zerolog.Logger) {
setPropertyWrapper(o.element, "offset-x", o.X)
setPropertyWrapper(o.element, "offset-y", o.Y)
if o.Display {
o.show()
} else {
o.hide()
}
}
func (o *ImageOverlay) show() gst.ClockCallback {
return func(clock *gst.Clock, clockTime time.Duration) bool {
setPropertyWrapper(o.element, "alpha", 1)
return true
}
}
func (o *ImageOverlay) hide() gst.ClockCallback {
return func(clock *gst.Clock, clockTime time.Duration) bool {
setPropertyWrapper(o.element, "alpha", 0)
return true
}
}
func (o *ImageOverlay) getName() string {
return o.Name
}
func (o *ImageOverlay) getBlendInTime() time.Duration {
return o.BlendIn
}
func (o *ImageOverlay) getBlendOutTime() time.Duration {
return o.BlendOut
}
func (o *ImageOverlay) getElement() *gst.Element {
return o.element
}
func (o *ImageOverlay) setElement(element *gst.Element) {
o.element = element
}
func (o *ImageOverlay) getType() string {
return "imageoverlay"
}

109
gstreamer/TextOverlay.go Normal file
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@ -0,0 +1,109 @@
package gstreamer
import (
"fmt"
"github.com/rs/zerolog"
"github.com/tinyzimmer/go-gst/gst"
"strconv"
"strings"
"time"
)
func (o *TextOverlay) create(log zerolog.Logger) (*gst.Element, error) {
e, err := gst.NewElementWithName("textoverlay", o.Name)
if err != nil {
log.Error().Msgf("could not create element %s: %v\n", o.Name, err)
return nil, fmt.Errorf("could not create element %s", o.Name)
}
setPropertyWrapper(e, "draw-outline", false)
setPropertyWrapper(e, "draw-shadow", false)
setPropertyWrapper(e, "halignment", "0") //left
setPropertyWrapper(e, "valignment", "2") //top
setPropertyWrapper(e, "deltax", o.X)
setPropertyWrapper(e, "deltay", o.Y)
setPropertyWrapper(e, "color", o.Color)
setPropertyWrapper(e, "font-desc", fmt.Sprintf("%s, %s %v", o.Font, o.FontWeight, o.FontSize))
setPropertyWrapper(e, "text", o.Value)
if o.Display {
o.show()
} else {
o.hide()
}
o.element = e
return e, nil
}
func (o *TextOverlay) update(log zerolog.Logger) {
text, _ := o.element.GetProperty("text")
if text != o.Value {
setPropertyWrapper(o.element, "text", o.Value)
setPropertyWrapper(o.element, "font-desc", fmt.Sprintf("Fira Sans, %s %v", o.FontWeight, o.FontSize))
}
setPropertyWrapper(o.element, "deltax", o.X)
setPropertyWrapper(o.element, "deltay", o.Y)
if o.Display {
o.show()
} else {
o.hide()
}
o.resizeTextOverlay(log)
}
func (o *TextOverlay) show() gst.ClockCallback {
return func(clock *gst.Clock, clockTime time.Duration) bool {
setPropertyWrapper(o.element, "silent", 0)
return true
}
}
func (o *TextOverlay) hide() gst.ClockCallback {
return func(clock *gst.Clock, clockTime time.Duration) bool {
setPropertyWrapper(o.element, "silent", 1)
return true
}
}
func (o *TextOverlay) getName() string {
return o.Name
}
func (o *TextOverlay) resizeTextOverlay(log zerolog.Logger) {
if o.MaxWidth == 0 {
return
}
width, _ := o.element.GetProperty("text-width")
for width.(uint) >= o.MaxWidth {
log.Debug().Str("name", o.Name).Uint("width", width.(uint)).Uint("max-width", o.MaxWidth).Msg("Shrinking Textoverlay")
fontdesc, _ := o.element.GetProperty("font-desc")
fd := strings.Fields(fontdesc.(string))
fontsize, _ := strconv.Atoi(fd[len(fd)-1])
setPropertyWrapper(o.element, "font-desc", fmt.Sprintf("%s, %s %v", o.Font, o.FontWeight, fontsize-1))
time.Sleep(time.Millisecond * 60)
width, _ = o.element.GetProperty("text-width")
}
}
func (o TextOverlay) getBlendInTime() time.Duration {
return o.BlendIn
}
func (o TextOverlay) getBlendOutTime() time.Duration {
return o.BlendOut
}
func (o *TextOverlay) getElement() *gst.Element {
return o.element
}
func (o *TextOverlay) setElement(element *gst.Element) {
o.element = element
}
func (o *TextOverlay) getType() string {
return "textoverlay"
}

33
gstreamer/gstreamer.go Normal file
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@ -0,0 +1,33 @@
package gstreamer
import (
"errors"
"github.com/tinyzimmer/go-glib/glib"
"github.com/tinyzimmer/go-gst/gst"
)
var gstreamer *Gstreamer
func Init() *Gstreamer {
gst.Init(nil)
glib.NewMainLoop(glib.MainContextDefault(), true)
gstreamer = &Gstreamer{}
return gstreamer
}
func (g *Gstreamer) DeletePipeline(id string) {
g.Lock()
if pipeline, err := g.GetPipeline(id); err == nil {
delete(g.Pipelines, id)
pipeline.ctxCancel()
}
g.Unlock()
}
func (g *Gstreamer) GetPipeline(id string) (*Pipeline, error) {
g.RLock()
if pipeline, ok := g.Pipelines[id]; ok {
return pipeline, nil
}
return nil, errors.New("Pipeline not found")
}

119
gstreamer/input.go Normal file
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@ -0,0 +1,119 @@
package gstreamer
import (
"fmt"
"github.com/rs/zerolog"
"github.com/tinyzimmer/go-gst/gst"
)
func (i *InputElement) create(pipeline *gst.Pipeline, log zerolog.Logger) error {
elements := map[string]element{}
e, err := gst.NewElementWithName(i.Type, i.Name)
if err != nil {
log.Error().Msgf("could not create element %s: %v\n", i.Name, err)
return fmt.Errorf("could not create element %s", i.Name)
}
for prop, value := range i.Properties {
setPropertyWrapper(e, prop, value)
}
err = pipeline.Add(e)
if err != nil {
log.Error().Msgf("could not add element %s to pipeline: %v\n", i.Name, err)
return fmt.Errorf("could not add element %s to pipeline", i.Name)
}
input := element{element: e, name: i.Name, next: fmt.Sprintf("%s-decodebin", i.Name)}
elements[i.Name] = input
// ====================
//====================
// DECODEBIN
e, err = gst.NewElementWithName("decodebin", fmt.Sprintf("%s-decodebin", i.Name))
if err != nil {
log.Error().Msgf("could not create decodebin for %s: %v\n", i.Name, err)
return fmt.Errorf("could not create decodebin for %s", i.Name)
}
err = pipeline.Add(e)
if err != nil {
log.Error().Msgf("could not add decodebin for %s to pipeline: %v\n", i.Name, err)
return fmt.Errorf("could not add decodebin for %s to pipeline", i.Name)
}
decodebin := element{element: e, name: fmt.Sprintf("%s-decodebin", i.Name), prev: i.Name, next: fmt.Sprintf("%s-videoconvert", i.Name)}
elements[fmt.Sprintf("%s-decodebin", i.Name)] = decodebin
err = input.linkElementWrapper(&decodebin, log)
if err != nil {
log.Error().Msgf("could not link %s to %s: %v\n", i.Name, fmt.Sprintf("%s-decodebin", i.Name), err)
return fmt.Errorf("could not link %s to %s", i.Name, fmt.Sprintf("%s-decodebin", i.Name))
}
//====================
// ====================
// VIDEOCONVERT
e, err = gst.NewElementWithName("videoconvert", fmt.Sprintf("%s-videoconvert", i.Name))
if err != nil {
log.Error().Msgf("could not create videoconvert for %s: %v\n", i.Name, err)
return fmt.Errorf("could not create videoconvert for %s", i.Name)
}
err = pipeline.Add(e)
if err != nil {
log.Error().Msgf("could not add videoconvert for %s to pipeline: %v\n", i.Name, err)
return fmt.Errorf("could not add videoconvert for %s to pipeline", i.Name)
}
videoconvert := element{element: e, name: fmt.Sprintf("%s-videoconvert", i.Name), prev: fmt.Sprintf("%s-decodebin", i.Name), next: fmt.Sprintf("%s-videoscale", i.Name)}
elements[fmt.Sprintf("%s-videoconvert", i.Name)] = videoconvert
err = input.linkElementWrapper(&videoconvert, log)
if err != nil {
log.Error().Msgf("could not link %s to %s: %v\n", i.Name, fmt.Sprintf("%s-videoconvert", i.Name), err)
return fmt.Errorf("could not link %s to %s", i.Name, fmt.Sprintf("%s-videoconvert", i.Name))
}
//=====================
//=====================
// VIDEOSCALE
e, err = gst.NewElementWithName("videoscale", fmt.Sprintf("%s-videoscale", i.Name))
if err != nil {
log.Error().Msgf("could not create videoscale for %s: %v\n", i.Name, err)
return fmt.Errorf("could not create videoscale for %s", i.Name)
}
err = pipeline.Add(e)
if err != nil {
log.Error().Msgf("could not add videoscale for %s to pipeline: %v\n", i.Name, err)
return fmt.Errorf("could not add videoscale for %s to pipeline", i.Name)
}
videoscale := element{element: e, name: fmt.Sprintf("%s-videoscale", i.Name), prev: fmt.Sprintf("%s-videoconvert", i.Name), next: fmt.Sprintf("%s-videorate", i.Name)}
elements[fmt.Sprintf("%s-videoscale", i.Name)] = videoscale
err = videoconvert.linkElementWrapper(&videoscale, log)
if err != nil {
log.Error().Msgf("could not link %s to %s: %v\n", fmt.Sprintf("%s-videoconvert", i.Name), fmt.Sprintf("%s-videoscale", i.Name), err)
return fmt.Errorf("could not link %s to %s", fmt.Sprintf("%s-videoconvert", i.Name), fmt.Sprintf("%s-videoscale", i.Name))
}
//=====================
//=====================
// VIDEORATE
e, err = gst.NewElementWithName("videorate", fmt.Sprintf("%s-videorate", i.Name))
if err != nil {
log.Error().Msgf("could not create videorate for %s: %v\n", i.Name, err)
return fmt.Errorf("could not create videorate for %s", i.Name)
}
err = pipeline.Add(e)
if err != nil {
log.Error().Msgf("could not add videorate for %s to pipeline: %v\n", i.Name, err)
return fmt.Errorf("could not add videorate for %s to pipeline", i.Name)
}
videorate := element{element: e, name: fmt.Sprintf("%s-videorate", i.Name), prev: fmt.Sprintf("%s-videoscale", i.Name), outputCaps: i.Caps}
elements[fmt.Sprintf("%s-videorate", i.Name)] = videorate
err = videoscale.linkElementWrapper(&videorate, log)
if err != nil {
log.Error().Msgf("could not link %s to %s: %v\n", fmt.Sprintf("%s-videoscale", i.Name), fmt.Sprintf("%s-videorate", i.Name), err)
return fmt.Errorf("could not link %s to %s", fmt.Sprintf("%s-videoscale", i.Name), fmt.Sprintf("%s-videorate", i.Name))
}
i.elements = elements
return nil
}
func (i *InputElement) getLastElement() *element {
e := i.elements[fmt.Sprintf("%s-videorate", i.Name)]
return &e
}

85
gstreamer/output.go Normal file
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@ -0,0 +1,85 @@
package gstreamer
import (
"fmt"
"github.com/rs/zerolog"
"github.com/tinyzimmer/go-gst/gst"
)
func (o *OutputElement) create(pipeline *gst.Pipeline, lastElement *element, log zerolog.Logger) error {
elements := map[string]element{}
e, err := gst.NewElementWithName("videoconvert", fmt.Sprintf("%s-videoconvert", o.Name))
if err != nil {
log.Error().Msgf("could not create videoconvert for %s: %v\n", o.Name, err)
return fmt.Errorf("could not create videoconvert for %s", o.Name)
}
err = pipeline.Add(e)
if err != nil {
log.Error().Msgf("could not add videoconvert for %s to pipeline: %v\n", o.Name, err)
return fmt.Errorf("could not add videoconvert for %s to pipeline", o.Name)
}
videoconvert := element{element: e, name: fmt.Sprintf("%s-videoconvert", o.Name), prev: lastElement.name, next: fmt.Sprintf("%s-videoscale", o.Name), inputCaps: o.Caps}
elements[fmt.Sprintf("%s-videoconvert", o.Name)] = videoconvert
err = lastElement.linkElementWrapper(&videoconvert, log)
if err != nil {
log.Error().Msgf("could not link %s to %s: %v\n", o.Name, fmt.Sprintf("%s-videoconvert", o.Name), err)
return fmt.Errorf("could not link %s to %s", o.Name, fmt.Sprintf("%s-videoconvert", o.Name))
}
e, err = gst.NewElementWithName("videoscale", fmt.Sprintf("%s-videoscale", o.Name))
if err != nil {
log.Error().Msgf("could not create videoscale for %s: %v\n", o.Name, err)
return fmt.Errorf("could not create videoscale for %s", o.Name)
}
err = pipeline.Add(e)
if err != nil {
log.Error().Msgf("could not add videoscale for %s to pipeline: %v\n", o.Name, err)
return fmt.Errorf("could not add videoscale for %s to pipeline", o.Name)
}
videoscale := element{element: e, name: fmt.Sprintf("%s-videoscale", o.Name), prev: fmt.Sprintf("%s-videoconvert", o.Name), next: fmt.Sprintf("%s-videorate", o.Name)}
elements[fmt.Sprintf("%s-videoscale", o.Name)] = videoscale
err = videoconvert.linkElementWrapper(&videoscale, log)
if err != nil {
log.Error().Msgf("could not link %s to %s: %v\n", fmt.Sprintf("%s-videoconvert", o.Name), fmt.Sprintf("%s-videoscale", o.Name), err)
return fmt.Errorf("could not link %s to %s", fmt.Sprintf("%s-videoconvert", o.Name), fmt.Sprintf("%s-videoscale", o.Name))
}
e, err = gst.NewElementWithName("videorate", fmt.Sprintf("%s-videorate", o.Name))
if err != nil {
log.Error().Msgf("could not create videorate for %s: %v\n", o.Name, err)
return fmt.Errorf("could not create videorate for %s", o.Name)
}
err = pipeline.Add(e)
if err != nil {
log.Error().Msgf("could not add videorate for %s to pipeline: %v\n", o.Name, err)
return fmt.Errorf("could not add videorate for %s to pipeline", o.Name)
}
videorate := element{element: e, name: fmt.Sprintf("%s-videorate", o.Name), prev: fmt.Sprintf("%s-videoscale", o.Name), next: o.Name}
elements[fmt.Sprintf("%s-videorate", o.Name)] = videorate
err = videoscale.linkElementWrapper(&videorate, log)
if err != nil {
log.Error().Msgf("could not link %s to %s: %v\n", fmt.Sprintf("%s-videoscale", o.Name), fmt.Sprintf("%s-videorate", o.Name), err)
return fmt.Errorf("could not link %s to %s", fmt.Sprintf("%s-videoscale", o.Name), fmt.Sprintf("%s-videorate", o.Name))
}
e, err = gst.NewElementWithName(o.Type, o.Name)
if err != nil {
log.Error().Msgf("could not create element %s: %v\n", o.Name, err)
return fmt.Errorf("could not create element %s", o.Name)
}
for prop, value := range o.Properties {
setPropertyWrapper(e, prop, value)
}
err = pipeline.Add(e)
if err != nil {
log.Error().Msgf("could not add element %s to pipeline: %v\n", o.Name, err)
return fmt.Errorf("could not add element %s to pipeline", o.Name)
}
output := element{element: e, name: o.Name, prev: fmt.Sprintf("%s-videoscale", o.Name)}
elements[o.Name] = output
o.elements = elements
return nil
}

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package gstreamer
import (
"context"
"fmt"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
"github.com/tinyzimmer/go-gst/gst"
"sync"
)
func (p *Pipeline) Create() (chan PipelineUpdates, error) {
gstreamerLogger := log.With().Str("Component", "gstreamer").Str("Pipeline", p.Name).Logger()
p.logger = gstreamerLogger
pipeline, err := gst.NewPipeline(p.Name)
if err != nil {
return nil, err
}
elements := map[string]element{}
err = p.InputElement.create(pipeline, gstreamerLogger)
if err != nil {
return nil, err
}
for name, e := range p.InputElement.elements {
elements[name] = e
}
lastElement := p.InputElement.getLastElement()
for _, overlay := range p.Overlays {
gstreamerLogger.Debug().Str("Overlay", overlay.getName()).Msg("Adding overlay")
overlayElement, _ := overlay.create(gstreamerLogger)
e := &element{
element: overlayElement,
name: overlay.getName(),
}
lastElement.linkElementWrapper(e, gstreamerLogger)
lastElement = e
elements[overlay.getName()] = *lastElement
}
err = p.OutputElement.create(pipeline, lastElement, gstreamerLogger)
if err != nil {
return nil, err
}
for name, e := range p.OutputElement.elements {
elements[name] = e
}
pipeline.GetPipelineBus().AddWatch(func(msg *gst.Message) bool {
switch msg.Type() {
case gst.MessageEOS: // When end-of-stream is received flush the pipeline and stop the main loop
pipeline.BlockSetState(gst.StateNull)
case gst.MessageError: // Error messages are always fatal
err := msg.ParseError()
gstreamerLogger.Error().Msg(err.Error())
if debug := err.DebugString(); debug != "" {
gstreamerLogger.Debug().Msg(debug)
}
case gst.MessageStreamStart:
gstreamerLogger.Info().Msgf("STARTING Playout of %s", p.Name)
clock := pipeline.GetPipelineClock()
now := clock.GetTime()
for _, overlay := range p.Overlays {
if overlay.getBlendInTime() != -1 {
clock.NewSingleShotID(now + overlay.getBlendInTime()).WaitAsync(overlay.show())
}
if overlay.getBlendOutTime() != -1 {
clock.NewSingleShotID(now + overlay.getBlendOutTime()).WaitAsync(overlay.hide())
}
}
case gst.MessageStateChanged:
_, newState := msg.ParseStateChanged()
if newState == gst.StatePlaying && msg.Source() == p.Name {
gstreamerLogger.Debug().Msgf("Pipeline %s started", p.Name)
p.resizeAllTextOverlays(gstreamerLogger)
}
default:
// All messages implement a Stringer. However, this is
// typically an expensive thing to do and should be avoided.
gstreamerLogger.Debug().Msgf(msg.String())
}
return true
})
p.ctx, p.ctxCancel = context.WithCancel(gstreamer.ctx)
updateChannel := make(chan PipelineUpdates)
go p.overlayUpdater(updateChannel, gstreamerLogger)
p.PipelineUpdates = updateChannel
gstreamer.Lock()
gstreamer.Pipelines[p.ID] = p
gstreamer.Unlock()
return updateChannel, nil
}
//TODO check if output is decklink
func (p *Pipeline) Start() error {
output, err := gstreamer.getDecklinkOutput(p.Name)
setPropertyWrapper(p.elements[p.OutputElement.Name].element, "device-number", output)
err = p.pipeline.SetState(gst.StatePlaying)
if err != nil {
p.logger.Error().Msgf("Failed to set pipeline %s to playing: %v", p.Name, err)
return fmt.Errorf("Failed to set pipeline %s to playing: %v", p.Name, err)
}
return nil
}
func (p *Pipeline) Stop() error {
err := p.pipeline.SetState(gst.StateNull)
if err != nil {
p.logger.Error().Msgf("Failed to set pipeline %s to null: %v", p.Name, err)
return fmt.Errorf("Failed to set pipeline %s to null: %v", p.Name, err)
}
return nil
}
func (p *Pipeline) resizeAllTextOverlays(log zerolog.Logger) {
for _, overlay := range p.Overlays {
if x, ok := overlay.(*TextOverlay); ok {
go x.resizeTextOverlay(log)
}
}
}
func (p *Pipeline) overlayUpdater(updateChannel chan PipelineUpdates, log zerolog.Logger) {
for {
select {
case <-p.ctx.Done():
return
case updates := <-updateChannel:
log.Info().Msgf("Updating overlays with %d text overlays", len(updates.Overlays))
var wg sync.WaitGroup
for _, overlay := range updates.Overlays {
wg.Add(1)
go func(overlay Overlay) {
defer wg.Done()
o, ok := p.Overlays[overlay.getName()]
if !ok {
log.Error().Msgf("Could not find overlay %s", overlay.getName())
return
}
overlay.setElement(o.getElement())
overlay.update(log)
}(overlay)
}
wg.Wait()
log.Debug().Msg("Overlays updated")
//TODO channel done
}
}
}

101
gstreamer/types.go Normal file
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package gstreamer
import (
"context"
"github.com/rs/zerolog"
"github.com/tinyzimmer/go-gst/gst"
"sync"
"time"
)
type Gstreamer struct {
Pipelines map[string]*Pipeline
*Decklink
ctx context.Context
}
type Pipeline struct {
Name string
ID string
InputElement InputElement
OutputElement OutputElement
Overlays map[string]Overlay
PipelineUpdates chan PipelineUpdates
pipeline *gst.Pipeline
logger zerolog.Logger
elements map[string]element
ctx context.Context
ctxCancel context.CancelFunc
sync.RWMutex
}
type Decklink struct {
Slots map[string]string
sync.RWMutex
}
type PipelineUpdates struct {
Overlays map[string]Overlay
}
type element struct {
prev, next string
element *gst.Element
name string
inputCaps []string
outputCaps []string
}
type Overlay interface {
getName() string
create(log zerolog.Logger) (*gst.Element, error)
getBlendInTime() time.Duration
getBlendOutTime() time.Duration
show() gst.ClockCallback
hide() gst.ClockCallback
update(log zerolog.Logger)
getElement() *gst.Element
setElement(element *gst.Element)
getType() string
}
type ImageOverlay struct {
element *gst.Element
Name string
Path string
X, Y int
Display bool
BlendIn time.Duration
BlendOut time.Duration
}
type TextOverlay struct {
element *gst.Element
Name string
X, Y int
Font string
FontSize int
FontWeight string
Color uint32
Value string
Display bool
MaxWidth uint
BlendIn time.Duration
BlendOut time.Duration
}
type InputElement struct {
Name string
Type string
Properties map[string]string
Caps []string
elements map[string]element
}
type OutputElement struct {
Name string
Type string
Properties map[string]string
Caps []string
elements map[string]element
}

47
gstreamer/utils.go Normal file
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package gstreamer
import (
"fmt"
"github.com/rs/zerolog"
"github.com/tinyzimmer/go-gst/gst"
"strings"
)
func setPropertyWrapper(element *gst.Element, name string, value interface{}) {
element.SetArg(name, fmt.Sprintf("%v", value))
}
func (element1 *element) linkElementWrapper(element2 *element, log zerolog.Logger, capabilities ...string) error {
var err error
var caps string
if len(capabilities) > 0 {
caps = strings.Join(capabilities, ", ")
}
if len(element1.outputCaps) > 0 {
if caps != "" {
log.Error().Str("action", "linking").Str("element1", element1.name).Str("element2", element2.name).Msg("element1 has output caps but you specified already caps so i'm only using them")
} else {
caps = strings.Join(element1.outputCaps, ",")
}
}
if len(element2.inputCaps) > 0 {
if caps != "" {
log.Error().Str("action", "linking").Str("element1", element1.name).Str("element2", element2.name).Msg("element2 has input caps but you specified already caps so i'm only using them")
} else {
caps = strings.Join(element2.inputCaps, ",")
}
}
if len(caps) > 0 {
capabilities := gst.NewCapsFromString(caps)
err = element1.element.LinkFiltered(element2.element, capabilities)
} else {
err = element1.element.Link(element2.element)
}
if err != nil {
log.Error().Msgf("could not link %s to %s: %v\n", element2.name, element1.name, err)
return fmt.Errorf("could not link %s to %s", element2.name, element1.name)
}
element1.next, element2.prev = element2.name, element1.name
return nil
}

57
main.go Normal file
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package main
import (
"flag"
"git.entr0py.de/garionion/gstreamer-graphix/api"
"git.entr0py.de/garionion/gstreamer-graphix/gstreamer"
"github.com/ilyakaznacheev/cleanenv"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
"github.com/rs/zerolog/pkgerrors"
"google.golang.org/grpc"
"net"
"os"
"time"
)
type Config struct {
Outputs []string `yaml:"outputs"`
Address string `yaml:"address" env:"ADDRESS" env-default:":3000"`
LogFile string `yaml:"logfile" env:"LOGFILE" env-default:"./gstreamer-graphix.log"`
}
var cfg Config
func main() {
zerolog.TimeFieldFormat = time.RFC1123Z
consoleWriter := zerolog.ConsoleWriter{Out: os.Stdout, TimeFormat: time.RFC1123Z}
log.Logger = log.Output(consoleWriter).With().Timestamp().Caller().Logger()
if err := cleanenv.ReadConfig("config.toml", &cfg); err != nil {
log.Fatal().Msgf("No configfile: ", err)
}
fset := flag.NewFlagSet("config", flag.ContinueOnError)
fset.Usage = cleanenv.FUsage(fset.Output(), &cfg, nil, fset.Usage)
fset.Parse(os.Args[1:])
l, err := os.OpenFile(cfg.LogFile, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0664)
multi := zerolog.MultiLevelWriter(consoleWriter, l)
log.Logger = zerolog.New(multi).With().Timestamp().Caller().Logger()
zerolog.ErrorStackMarshaler = pkgerrors.MarshalStack
ln, err := net.Listen("tcp", cfg.Address)
if err != nil {
log.Fatal().Err(err)
}
gst := gstreamer.Init()
pipelineService := &api.PipelineService{Gstreamer: gst}
g := grpc.NewServer()
api.RegisterPipelineServiceServer(g, pipelineService)
log.Fatal().Msgf("Failed to serve: %v", g.Serve(ln))
}

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package.nix Normal file
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{ pkgs ? import <nixpkgs> { }, self }:
with pkgs;
assert lib.versionAtLeast go.version "1.16";
let
version = "0.0.1";
deps = [
gst_all_1.gstreamer
gst_all_1.gstreamer.dev
gst_all_1.gst-plugins-base
gst_all_1.gst-plugins-good
gst_all_1.gst-plugins-bad
gst_all_1.gst-plugins-ugly
protoc-gen-go
];
nativeDeps = [
gcc
pkg-config
];
in
pkgs.buildGo117Module {
pname = "gstreamer-grafix";
inherit version;
src = self;
buildInputs = [
] ++deps;
nativeBuildInputs = [
] ++nativeDeps;
tags = [ ];
allowGoReference = true;
#vendorSha256 = lib.fakeSha256;
vendorSha256 = "sha256-Hhrhi/TBTo9pS6A5F4Q3LeJnW0z/ajN6jg5EAdo8dgA=";
#meta = {
# description = "An MVC framework in Go, inspired by Ruby on Rails";
# homepage = "https://gobuffalo.io";
#};
}