104 lines
2.3 KiB
Go
104 lines
2.3 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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"time"
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"unsafe"
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"m1k1o/neko/internal/types"
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)
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// Pipeline is a wrapper for a GStreamer Pipeline
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type Pipeline struct {
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Pipeline *C.GstElement
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Sample chan types.Sample
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Src string
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id int
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}
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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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registry = C.gst_registry_get()
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}
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// CreatePipeline creates a GStreamer Pipeline
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func CreatePipeline(pipelineStr string) (*Pipeline, error) {
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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 err *C.GError
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gstPipeline := C.gstreamer_send_create_pipeline(pipelineStrUnsafe, &err)
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if err != nil {
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defer C.g_error_free(err)
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return nil, fmt.Errorf("%s", C.GoString(err.message))
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}
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p := &Pipeline{
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Pipeline: gstPipeline,
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Sample: make(chan types.Sample),
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Src: pipelineStr,
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id: len(pipelines),
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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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// Start starts the GStreamer Pipeline
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func (p *Pipeline) Start() {
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C.gstreamer_send_start_pipeline(p.Pipeline, C.int(p.id))
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}
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// Play starts the GStreamer Pipeline
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func (p *Pipeline) Play() {
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C.gstreamer_send_play_pipeline(p.Pipeline)
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}
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// Stop stops the GStreamer Pipeline
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func (p *Pipeline) Stop() {
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C.gstreamer_send_stop_pipeline(p.Pipeline)
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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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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{Data: C.GoBytes(buffer, bufferLen), Timestamp: time.Now(), Duration: time.Duration(duration)}
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} else {
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fmt.Printf("discarding buffer, no pipeline with id %d", int(pipelineID))
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}
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C.free(buffer)
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}
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