neko/internal/capture/gst/gst.go
Miroslav Šedivý d068698836 update logging.
2022-02-12 18:55:56 +01:00

159 lines
3.3 KiB
Go

package gst
/*
#cgo pkg-config: gstreamer-1.0 gstreamer-app-1.0
#include "gst.h"
*/
import "C"
import (
"fmt"
"sync"
"sync/atomic"
"time"
"unsafe"
"demodesk/neko/internal/types"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
)
type Pipeline struct {
id int
Src string
Ctx *C.GstPipelineCtx
Sample chan types.Sample
}
var pSerial int32
var pipelines = make(map[int]*Pipeline)
var pipelinesLock sync.Mutex
var registry *C.GstRegistry
func init() {
C.gstreamer_init()
go C.gstreamer_loop()
registry = C.gst_registry_get()
}
func CreatePipeline(pipelineStr string) (*Pipeline, error) {
id := atomic.AddInt32(&pSerial, 1)
pipelineStrUnsafe := C.CString(pipelineStr)
defer C.free(unsafe.Pointer(pipelineStrUnsafe))
pipelinesLock.Lock()
defer pipelinesLock.Unlock()
var gstError *C.GError
ctx := C.gstreamer_pipeline_create(pipelineStrUnsafe, C.int(id), &gstError)
if gstError != nil {
defer C.g_error_free(gstError)
return nil, fmt.Errorf("(pipeline error) %s", C.GoString(gstError.message))
}
p := &Pipeline{
id: int(id),
Src: pipelineStr,
Ctx: ctx,
Sample: make(chan types.Sample),
}
pipelines[p.id] = p
return p, nil
}
func (p *Pipeline) AttachAppsink(sinkName string) {
sinkNameUnsafe := C.CString(sinkName)
defer C.free(unsafe.Pointer(sinkNameUnsafe))
C.gstreamer_pipeline_attach_appsink(p.Ctx, sinkNameUnsafe)
}
func (p *Pipeline) AttachAppsrc(srcName string) {
srcNameUnsafe := C.CString(srcName)
defer C.free(unsafe.Pointer(srcNameUnsafe))
C.gstreamer_pipeline_attach_appsrc(p.Ctx, srcNameUnsafe)
}
func (p *Pipeline) Play() {
C.gstreamer_pipeline_play(p.Ctx)
}
func (p *Pipeline) Pause() {
C.gstreamer_pipeline_pause(p.Ctx)
}
func (p *Pipeline) Destroy() {
C.gstreamer_pipeline_destory(p.Ctx)
pipelinesLock.Lock()
delete(pipelines, p.id)
pipelinesLock.Unlock()
close(p.Sample)
C.free(unsafe.Pointer(p.Ctx))
p = nil
}
func (p *Pipeline) Push(buffer []byte) {
bytes := C.CBytes(buffer)
defer C.free(bytes)
C.gstreamer_pipeline_push(p.Ctx, bytes, C.int(len(buffer)))
}
// gst-inspect-1.0
func CheckPlugins(plugins []string) error {
var plugin *C.GstPlugin
for _, pluginstr := range plugins {
plugincstr := C.CString(pluginstr)
plugin = C.gst_registry_find_plugin(registry, plugincstr)
C.free(unsafe.Pointer(plugincstr))
if plugin == nil {
return fmt.Errorf("required gstreamer plugin %s not found", pluginstr)
}
}
return nil
}
//export goHandlePipelineBuffer
func goHandlePipelineBuffer(buffer unsafe.Pointer, bufferLen C.int, duration C.int, pipelineID C.int) {
defer C.free(buffer)
pipelinesLock.Lock()
pipeline, ok := pipelines[int(pipelineID)]
pipelinesLock.Unlock()
if ok {
pipeline.Sample <- types.Sample{
Data: C.GoBytes(buffer, bufferLen),
Duration: time.Duration(duration),
}
} else {
log.Warn().
Str("module", "capture").
Str("submodule", "gstreamer").
Int("pipeline_id", int(pipelineID)).
Msgf("discarding sample, pipeline not found")
}
}
//export goPipelineLog
func goPipelineLog(levelUnsafe *C.char, msgUnsafe *C.char, pipelineID C.int) {
levelStr := C.GoString(levelUnsafe)
msg := C.GoString(msgUnsafe)
level, _ := zerolog.ParseLevel(levelStr)
log.WithLevel(level).
Str("module", "capture").
Str("submodule", "gstreamer").
Int("pipeline_id", int(pipelineID)).
Msg(msg)
}