mirror of
https://github.com/m1k1o/neko.git
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155 lines
3.2 KiB
Go
155 lines
3.2 KiB
Go
package gst
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/*
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#cgo pkg-config: gstreamer-1.0 gstreamer-app-1.0
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#include "gst.h"
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*/
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import "C"
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import (
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"fmt"
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"sync"
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"sync/atomic"
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"time"
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"unsafe"
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"demodesk/neko/internal/types"
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"github.com/rs/zerolog"
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"github.com/rs/zerolog/log"
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)
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type Pipeline struct {
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id int
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Src string
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Ctx *C.GstPipelineCtx
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Sample chan types.Sample
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}
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var pSerial int32
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var pipelines = make(map[int]*Pipeline)
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var pipelinesLock sync.Mutex
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var registry *C.GstRegistry
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func init() {
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C.gstreamer_init()
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go C.gstreamer_loop()
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registry = C.gst_registry_get()
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}
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func CreatePipeline(pipelineStr string) (*Pipeline, error) {
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id := atomic.AddInt32(&pSerial, 1)
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pipelineStrUnsafe := C.CString(pipelineStr)
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defer C.free(unsafe.Pointer(pipelineStrUnsafe))
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pipelinesLock.Lock()
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defer pipelinesLock.Unlock()
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var gstError *C.GError
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ctx := C.gstreamer_pipeline_create(pipelineStrUnsafe, C.int(id), &gstError)
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if gstError != nil {
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defer C.g_error_free(gstError)
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return nil, fmt.Errorf("(pipeline error) %s", C.GoString(gstError.message))
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}
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p := &Pipeline{
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id: int(id),
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Src: pipelineStr,
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Ctx: ctx,
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Sample: make(chan types.Sample),
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}
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pipelines[p.id] = p
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return p, nil
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}
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func (p *Pipeline) AttachAppsink(sinkName string) {
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sinkNameUnsafe := C.CString(sinkName)
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defer C.free(unsafe.Pointer(sinkNameUnsafe))
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C.gstreamer_pipeline_attach_appsink(p.Ctx, sinkNameUnsafe)
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}
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func (p *Pipeline) Play() {
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C.gstreamer_pipeline_play(p.Ctx)
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}
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func (p *Pipeline) Pause() {
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C.gstreamer_pipeline_pause(p.Ctx)
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}
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func (p *Pipeline) Destroy() {
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C.gstreamer_pipeline_destory(p.Ctx)
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pipelinesLock.Lock()
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delete(pipelines, p.id)
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pipelinesLock.Unlock()
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close(p.Sample)
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C.free(unsafe.Pointer(p.Ctx))
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p = nil
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}
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func (p *Pipeline) Push(srcName string, buffer []byte) {
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srcNameUnsafe := C.CString(srcName)
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defer C.free(unsafe.Pointer(srcNameUnsafe))
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bytes := C.CBytes(buffer)
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defer C.free(bytes)
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C.gstreamer_pipeline_push(p.Ctx, srcNameUnsafe, bytes, C.int(len(buffer)))
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}
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// gst-inspect-1.0
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func CheckPlugins(plugins []string) error {
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var plugin *C.GstPlugin
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for _, pluginstr := range plugins {
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plugincstr := C.CString(pluginstr)
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plugin = C.gst_registry_find_plugin(registry, plugincstr)
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C.free(unsafe.Pointer(plugincstr))
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if plugin == nil {
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return fmt.Errorf("required gstreamer plugin %s not found", pluginstr)
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}
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}
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return nil
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}
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//export goHandlePipelineBuffer
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func goHandlePipelineBuffer(buffer unsafe.Pointer, bufferLen C.int, duration C.int, pipelineID C.int) {
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defer C.free(buffer)
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pipelinesLock.Lock()
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pipeline, ok := pipelines[int(pipelineID)]
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pipelinesLock.Unlock()
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if ok {
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pipeline.Sample <- types.Sample{
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Data: C.GoBytes(buffer, bufferLen),
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Duration: time.Duration(duration),
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}
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} else {
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log.Warn().
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Str("module", "capture").
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Str("submodule", "gstreamer").
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Int("pipeline-id", int(pipelineID)).
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Msgf("discarding sample, pipeline not found")
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}
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}
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//export goPipelineLog
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func goPipelineLog(levelUnsafe *C.char, msgUnsafe *C.char, pipelineID C.int) {
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levelStr := C.GoString(levelUnsafe)
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msg := C.GoString(msgUnsafe)
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level, _ := zerolog.ParseLevel(levelStr)
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log.WithLevel(level).
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Str("module", "capture").
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Str("submodule", "gstreamer").
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Int("pipeline-id", int(pipelineID)).
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Msg(msg)
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}
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