func PipelineWatchBus(pipeline *C.GstPipeline) chan *C.GstMessage {
bus := C.gst_pipeline_get_bus(pipeline)
defer C.gst_object_unref(asGPtr(bus))
messages := make(chan *C.GstMessage)
C.add_bus_watch(bus, unsafe.Pointer(&messages))
return messages
}
func oggplayer() {
pipeline := C.gst_pipeline_new(toGStr("audio-player"))
source, err := NewElement("filesrc", "file-source")
if err != nil {
log.Fatal(err)
}
demuxer, err := NewElement("oggdemux", "ogg-demuxer")
if err != nil {
log.Fatal(err)
}
decoder, err := NewElement("vorbisdec", "vorbis-decoder")
if err != nil {
log.Fatal(err)
}
conv, err := NewElement("audioconvert", "converter")
if err != nil {
log.Fatal(err)
}
sink, err := NewElement("autoaudiosink", "audio-output")
if err != nil {
log.Fatal(err)
}
ObjSet(asGObj(source), "location", os.Args[1])
messages := PipelineWatchBus(asGstPipeline(pipeline))
BinAdd(pipeline, source, demuxer, decoder, conv, sink)
ElementLink(source, demuxer)
ElementLink(decoder, conv, sink)
ObjConnect(asGObj(demuxer), "pad-added", func(elem *C.GstElement, pad *C.GstPad) {
sink := C.gst_element_get_static_pad(decoder, toGStr("sink"))
C.gst_pad_link(pad, sink)
C.gst_object_unref(asGPtr(sink))
})
C.gst_element_set_state(pipeline, C.GST_STATE_PLAYING)
go func() {
for msg := range messages {
MessageDump(msg)
}
}()
go func() {
var pos, length C.gint64
for _ = range time.NewTicker(time.Second * 1).C {
C.gst_element_query_position(pipeline, C.GST_FORMAT_TIME, &pos)
C.gst_element_query_duration(pipeline, C.GST_FORMAT_TIME, &length)
p("%v / %v\n", time.Duration(pos), time.Duration(length))
if time.Duration(pos) > time.Second*5 {
C.gst_element_seek(pipeline, 1.0, C.GST_FORMAT_TIME, C.GST_SEEK_FLAG_FLUSH,
C.GST_SEEK_TYPE_SET, 10,
C.GST_SEEK_TYPE_NONE, C.GST_CLOCK_TIME_NONE)
}
}
}()
loop := C.g_main_loop_new(nil, False())
C.g_main_loop_run(loop)
}
func NewElementFromUri(t C.GstURIType, uri, name string) (*C.GstElement, error) {
var err *C.GError
element := C.gst_element_make_from_uri(t, toGStr(uri), toGStr(name), &err)
if element == nil {
defer C.g_error_free(err)
return nil, errors.New(fmt.Sprintf("%s", err.message))
}
runtime.SetFinalizer(element, func(e *C.GstElement) {
C.gst_object_unref(asGPtr(element))
})
return element, nil
}
func NewElement(factory string, name string) (*C.GstElement, error) {
cFactory := toGStr(factory)
cName := toGStr(name)
element := C.gst_element_factory_make(cFactory, cName)
if element == nil {
return nil, errors.New(fmt.Sprintf("failed to create element %s:%s", factory, name))
}
runtime.SetFinalizer(element, func(e *C.GstElement) {
C.gst_object_unref(asGPtr(element))
})
return element, nil
}
// Unref is a wrapper around gst_object_unref(). This is for internal use.
func (v *Object) Unref() {
C.gst_object_unref(C.gpointer(v.toObject()))
}
// pad probe
func probe() {
pipeline := C.gst_pipeline_new(toGStr("pipeline"))
src, err := NewElement("videotestsrc", "src")
if err != nil {
log.Fatal(err)
}
filter, err := NewElement("capsfilter", "filter")
if err != nil {
log.Fatal(err)
}
csp, err := NewElement("videoconvert", "csp")
if err != nil {
log.Fatal(err)
}
sink, err := NewElement("xvimagesink", "sink")
if err != nil {
log.Fatal(err)
}
BinAdd(pipeline, src, filter, csp, sink)
ElementLink(src, filter, csp, sink)
C.gst_element_set_state(pipeline, C.GST_STATE_PLAYING)
messages := PipelineWatchBus(asGstPipeline(pipeline))
width, height := 640, 480
filtercaps := NewCapsSimple("video/x-raw",
"format", "RGB16",
"width", width,
"height", height,
"framerate", Fraction{25, 1})
ObjSet(asGObj(filter), "caps", filtercaps)
n := C.gst_caps_get_size(filtercaps)
structure := C.gst_caps_get_structure(filtercaps, n-1)
_ = structure
C.gst_caps_unref(filtercaps)
pad := C.gst_element_get_static_pad(src, toGStr("src"))
PadAddProbe(pad, C.GST_PAD_PROBE_TYPE_BUFFER, func(info *C.GstPadProbeInfo) C.GstPadProbeReturn {
buffer := (*C.GstBuffer)(unsafe.Pointer(info.data))
buffer = asGstBuffer(C.gst_mini_object_make_writable(asGstMiniObject(buffer)))
var mapInfo C.GstMapInfo
C.gst_buffer_map(buffer, &mapInfo, C.GST_MAP_WRITE)
var ptr []C.guint16
header := (*reflect.SliceHeader)(unsafe.Pointer(&ptr))
header.Len = int(mapInfo.size / 2)
header.Cap = header.Len
header.Data = uintptr(unsafe.Pointer(mapInfo.data))
for y := 0; y < height; y++ {
for x := 0; x < width/2; x++ {
ptr[x], ptr[width-1-x] = ptr[width-1-x], ptr[x]
}
ptr = ptr[width:]
}
C.gst_buffer_unmap(buffer, &mapInfo)
info.data = asGPtr(buffer)
return C.GST_PAD_PROBE_OK
})
C.gst_object_unref(asGPtr(pad))
go func() {
for msg := range messages {
MessageDump(msg)
}
}()
loop := C.g_main_loop_new(nil, False())
C.g_main_loop_run(loop)
}
func mp3_play_process(cs chan byte, loop *C.GMainLoop) {
wg := new(sync.WaitGroup)
sig_in := make(chan bool)
sig_out := make(chan bool)
defer close(sig_in)
defer close(sig_out)
defer g_wg.Done()
if g_isOutOfOrder {
outOfOrder(g_list)
debug.FreeOSMemory()
}
start := g_list.Front()
end := g_list.Back()
e := g_list.Front()
for {
fpath, ok := e.Value.(string)
if ok {
// fmt.Printf("filename[%s]\n", fpath)
var pipeline, source, decoder, sink *C.GstElement // 定义组件
var bus *C.GstBus
switch filepath.Ext(fpath) {
case ".mp3":
v3 := GString("mad")
v4 := GString("mad-decoder")
decoder = C.gst_element_factory_make(v3, v4)
GFree(C.gpointer(v4))
GFree(C.gpointer(v3))
case ".wav":
v3 := GString("wavparse")
v4 := GString("parser")
decoder = C.gst_element_factory_make(v3, v4)
GFree(C.gpointer(v3))
GFree(C.gpointer(v4))
case ".ogg":
// v3 := GString("oggparse")
// defer GFree(C.gpointer(v3))
// v4 := GString("ogg-parser")
// defer GFree(C.gpointer(v4))
// decoder = C.gst_element_factory_make(v3, v4)
fallthrough
default:
return
}
// fmt.Printf("FileName[%s]FileSize[%d]Dir[%v]\n", path, info.Size(), info.IsDir())
// 创建管道和组件
v0 := GString("audio-player")
pipeline = C.gst_pipeline_new(v0)
GFree(C.gpointer(v0))
v1 := GString("filesrc")
v2 := GString("file-source")
source = C.gst_element_factory_make(v1, v2)
GFree(C.gpointer(v1))
GFree(C.gpointer(v2))
// sink = gst_element_factory_make("autoaudiosink","audio-output");
v5 := GString("alsasink")
v6 := GString("alsa-output")
sink = C.gst_element_factory_make(v5, v6)
GFree(C.gpointer(v6))
GFree(C.gpointer(v5))
if pipeline == (*C.GstElement)(nil) ||
source == (*C.GstElement)(nil) ||
decoder == (*C.GstElement)(nil) ||
sink == (*C.GstElement)(nil) {
fmt.Println("One element could not be created.Exiting.")
}
// 设置 source的location 参数。即 文件地址.
v7 := GString("location")
cpath := GString(fpath)
C.obj_set(unsafe.Pointer(source),
unsafe.Pointer(v7), unsafe.Pointer(cpath))
GFree(C.gpointer(v7))
GFree(C.gpointer(cpath))
// 得到 管道的消息总线
bus = C.pipeline_get_bus(unsafe.Pointer(pipeline))
if bus == (*C.GstBus)(nil) {
fmt.Println("GstBus element could not be created.Exiting.")
return
}
// 添加消息监视器
C.bus_add_watch(unsafe.Pointer(bus), unsafe.Pointer(loop))
C.gst_object_unref(C.gpointer(bus))
// 把组件添加到管道中.管道是一个特殊的组件，可以更好的让数据流动
C.bin_add_many(unsafe.Pointer(pipeline),
unsafe.Pointer(source), unsafe.Pointer(decoder),
unsafe.Pointer(sink))
// 依次连接组件
C.element_link_many(unsafe.Pointer(source),
unsafe.Pointer(decoder), unsafe.Pointer(sink))
// 开始播放
C.mp3_ready(unsafe.Pointer(pipeline))
C.mp3_play(unsafe.Pointer(pipeline))
wg.Add(1)
go func(p *C.GstElement) {
defer wg.Done()
// 开始循环
C.g_main_loop_run(loop)
C.mp3_stop(unsafe.Pointer(p))
C.object_unref(unsafe.Pointer(p))
select {
case c := <-sig_in:
if c {
return
}
default:
e = e.Next()
if e == nil {
sig_out <- true
return
}
}
sig_out <- false
}(pipeline)
lb := true
for lb {
select {
case op := <-cs:
switch op {
case 's':
C.mp3_pause(unsafe.Pointer(pipeline))
case 'r':
C.mp3_play(unsafe.Pointer(pipeline))
case 'n':
if e != end {
e = e.Next()
}
C.g_main_loop_quit(loop)
sig_in <- false
case 'p':
if e != start {
e = e.Prev()
}
C.g_main_loop_quit(loop)
sig_in <- false
case 'q':
C.g_main_loop_quit(loop)
sig_in <- true
wg.Wait()
return
}
case c := <-sig_out:
if c {
return
} else {
lb = false
}
}
}
wg.Wait()
}
}
}
