// playbin
func playbin() {
pipeline, err := NewElement("playbin", "playbin")
if err != nil {
log.Fatal(err)
}
uri := os.Args[1]
if !strings.Contains(uri, "://") {
uri, err = filepath.Abs(uri)
if err != nil {
log.Fatal(err)
}
uri = "file://" + uri
}
ObjSet(asGObj(pipeline), "uri", uri)
messages := PipelineWatchBus(asGstPipeline(pipeline))
go func() {
for msg := range messages {
MessageDump(msg)
}
}()
C.gst_element_set_state(pipeline, C.GST_STATE_PLAYING)
loop := C.g_main_loop_new(nil, False())
C.g_main_loop_run(loop)
}
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)
}
// ranged playing
func ranged() {
pipeline := C.gst_pipeline_new(toGStr("pipeline"))
src, err := NewElement("uridecodebin", "src")
if err != nil {
log.Fatal(err)
}
csp, err := NewElement("videoconvert", "csp")
if err != nil {
log.Fatal(err)
}
vs, err := NewElement("videoscale", "vs")
if err != nil {
log.Fatal(err)
}
sink, err := NewElement("autovideosink", "sink")
if err != nil {
log.Fatal(err)
}
ObjSet(asGObj(src), "uri", os.Args[1])
BinAdd(pipeline, src, csp, vs, sink)
ElementLink(csp, vs, sink)
//TODO sinkpad :=
ObjConnect(asGObj(src), "pad-added", func(e *C.GstElement, pad *C.GstPad) {
p("====\n")
PadAddProbe(pad, C.GST_PAD_PROBE_TYPE_BLOCK_DOWNSTREAM, func(info *C.GstPadProbeInfo) C.GstPadProbeReturn {
p("blocked\n")
return C.GST_PAD_PROBE_OK
})
//C.gst_pad_link(pad, sinkpad)
})
ObjConnect(asGObj(src), "no-more-pads", func(e *C.GstElement) {
})
C.gst_element_set_state(pipeline, C.GST_STATE_PAUSED)
messages := PipelineWatchBus(asGstPipeline(pipeline))
go func() {
for msg := range messages {
MessageDump(msg)
}
}()
loop := C.g_main_loop_new(nil, False())
C.g_main_loop_run(loop)
}
// SetState() is a wrapper around gst_element_set_state().
func (v *Element) SetState(state State) StateChangeReturn {
c := C.gst_element_set_state(v.native(), C.GstState(state))
return StateChangeReturn(c)
}
func play() {
// element
e, err := NewElement("fakesrc", "source")
if err != nil {
log.Fatal(err)
}
p("%v\n", e)
name := C.gst_object_get_name(asGstObj(e))
p("%s\n", fromGStr(name))
// factory
factory, err := NewFactory("fakesrc")
if err != nil {
log.Fatal(err)
}
p("%s\n", fromGStr(C.gst_object_get_name(asGstObj(factory))))
p("%s\n", fromGStr(C.gst_element_factory_get_metadata(factory, asGStr(C.CString(C.GST_ELEMENT_METADATA_KLASS)))))
p("%s\n", fromGStr(C.gst_element_factory_get_metadata(factory, asGStr(C.CString(C.GST_ELEMENT_METADATA_DESCRIPTION)))))
// id pipeline
pipeline := C.gst_pipeline_new(toGStr("pipeline"))
source, _ := NewElement("fakesrc", "source")
filter, _ := NewElement("identity", "filter")
sink, _ := NewElement("fakesink", "sink")
BinAdd(pipeline, source, filter, sink)
ElementLink(source, filter, sink)
C.gst_element_set_state(pipeline, C.GST_STATE_PLAYING)
C.gst_element_sync_state_with_parent(filter)
/*
// bin
bin := C.gst_bin_new(toGStr("bin"))
source, _ = NewElement("fakesrc", "source")
sink, _ = NewElement("fakesink", "sink")
BinAdd(bin, source, sink)
//C.gst_bin_remove(asGstBin(bin), source)
ElementLink(source, sink)
BinAdd(pipeline, bin)
source = C.gst_bin_get_by_name(asGstBin(bin), toGStr("source"))
*/
// bus
messages := PipelineWatchBus(asGstPipeline(pipeline))
loop := C.g_main_loop_new(nil, 0)
go func() {
C.g_main_loop_run(loop)
}()
// message
loop:
for msg := range messages {
runtime.GC()
p("=> %s from %s\n", fromGStr(C.gst_message_type_get_name(msg._type)),
fromGStr(C.gst_object_get_name(asGstObj(msg.src))))
switch msg._type {
case C.GST_MESSAGE_ERROR:
var err *C.GError
var debug *C.gchar
C.gst_message_parse_error(msg, &err, &debug)
p("Error: %s\n%s\n", fromGStr(err.message), fromGStr(debug))
C.g_error_free(err)
C.g_free(asGPtr(debug))
C.g_main_loop_quit(loop)
break loop
case C.GST_MESSAGE_WARNING:
case C.GST_MESSAGE_INFO:
case C.GST_MESSAGE_EOS:
C.g_main_loop_quit(loop)
break loop
case C.GST_MESSAGE_TAG:
var tags *C.GstTagList
C.gst_message_parse_tag(msg, &tags)
//TagListForeach(tags, ) TODO
C.gst_tag_list_unref(tags)
case C.GST_MESSAGE_STATE_CHANGED:
var newState, oldState C.GstState
C.gst_message_parse_state_changed(msg, &oldState, &newState, nil)
p("%s -> %s\n", fromGStr(C.gst_element_state_get_name(oldState)),
fromGStr(C.gst_element_state_get_name(newState)))
}
}
}
func play2() {
pipeline := C.gst_pipeline_new(toGStr("pipeline"))
source, err := NewElement("filesrc", "source")
if err != nil {
log.Fatal(err)
}
ObjSet(asGObj(source), "location", os.Args[1])
demux, err := NewElement("oggdemux", "demuxer")
if err != nil {
log.Fatal(err)
}
BinAdd(pipeline, source, demux)
C.gst_element_link_pads(source, toGStr("src"), demux, toGStr("sink"))
ObjConnect(asGObj(demux), "pad-added", func(demuxer *C.GstElement, pad *C.GstPad) {
p("pad added %T %v\n", pad, pad)
})
// bus
messages := PipelineWatchBus(asGstPipeline(pipeline))
C.gst_element_set_state(pipeline, C.GST_STATE_PLAYING)
loop := C.g_main_loop_new(nil, 0)
go func() {
loop:
for msg := range messages {
runtime.GC()
p("=> %s: %s\n", fromGStr(C.gst_object_get_name(asGstObj(msg.src))),
fromGStr(C.gst_message_type_get_name(msg._type)))
switch msg._type {
case C.GST_MESSAGE_ERROR:
var err *C.GError
var debug *C.gchar
C.gst_message_parse_error(msg, &err, &debug)
p("Error: %s\n%s\n", fromGStr(err.message), fromGStr(debug))
C.g_error_free(err)
C.g_free(asGPtr(debug))
C.g_main_loop_quit(loop)
break loop
case C.GST_MESSAGE_WARNING:
case C.GST_MESSAGE_INFO:
case C.GST_MESSAGE_EOS:
C.g_main_loop_quit(loop)
break loop
case C.GST_MESSAGE_TAG:
var tags *C.GstTagList
C.gst_message_parse_tag(msg, &tags)
//TagListForeach(tags, ) TODO
C.gst_tag_list_unref(tags)
case C.GST_MESSAGE_STATE_CHANGED:
var newState, oldState C.GstState
C.gst_message_parse_state_changed(msg, &oldState, &newState, nil)
p("%s -> %s\n", fromGStr(C.gst_element_state_get_name(oldState)),
fromGStr(C.gst_element_state_get_name(newState)))
}
C.gst_message_unref(msg)
}
p("loop break.\n")
}()
runtime.LockOSThread()
C.g_main_loop_run(loop)
p("quit.\n")
}
func (e *Element) SetState(state State) StateChangeReturn {
return StateChangeReturn(C.gst_element_set_state(e.g(), C.GstState(state)))
}
// 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)
}