// ParseStateChanged() is a wrapper around gst_message_parse_state_changed().
func (v *Message) ParseStateChanged() (oldState, newState, pending State) {
var o, n, p C.GstState
C.gst_message_parse_state_changed(v.native(), &o, &n, &p)
return State(o), State(n), State(p)
}
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 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 MessageDump(msg *C.GstMessage) {
srcName := fromGStr(C.gst_object_get_name(msg.src))
switch msg._type {
case C.GST_MESSAGE_UNKNOWN: // unknown
pMsg(srcName, "Unknown")
case C.GST_MESSAGE_EOS: // end of stream
pMsg(srcName, "Eos")
case C.GST_MESSAGE_ERROR: // error
var err *C.GError
var debug *C.gchar
C.gst_message_parse_error(msg, &err, &debug)
pMsg(srcName, "Error", "%s %s", fromGStr(err.message), fromGStr(debug))
C.g_error_free(err)
C.g_free(asGPtr(debug))
//case C.GST_MESSAGE_WARNING: // warning
//case C.GST_MESSAGE_INFO: // info
case C.GST_MESSAGE_TAG: // tag
var tagList *C.GstTagList
C.gst_message_parse_tag(msg, &tagList)
pMsg(srcName, "Tag")
TagForeach(tagList, func(tag *C.gchar) {
num := C.gst_tag_list_get_tag_size(tagList, tag)
for i := C.guint(0); i < num; i++ {
val := C.gst_tag_list_get_value_index(tagList, tag, i)
pMsg(srcName, "Tag", "%s = %v", fromGStr(tag), fromGValue(val))
}
})
C.gst_tag_list_unref(tagList)
//case C.GST_MESSAGE_BUFFERING: // buffering
case C.GST_MESSAGE_STATE_CHANGED: // state changed
var oldState, newState C.GstState
C.gst_message_parse_state_changed(msg, &oldState, &newState, nil)
pMsg(srcName, "State", "%s -> %s",
fromGStr(C.gst_element_state_get_name(oldState)),
fromGStr(C.gst_element_state_get_name(newState)))
//case C.GST_MESSAGE_STATE_DIRTY: // state dirty
//case C.GST_MESSAGE_STEP_DONE: // step done
//case C.GST_MESSAGE_CLOCK_PROVIDE: // clock provide
//case C.GST_MESSAGE_CLOCK_LOST: // clock lost
case C.GST_MESSAGE_NEW_CLOCK: // new clock
var clock *C.GstClock
C.gst_message_parse_new_clock(msg, &clock)
pMsg(srcName, "New clock")
//case C.GST_MESSAGE_STRUCTURE_CHANGE: // structure change
case C.GST_MESSAGE_STREAM_STATUS: // stream status
var t C.GstStreamStatusType
var owner *C.GstElement
C.gst_message_parse_stream_status(msg, &t, &owner)
pMsg(srcName, "Stream status", "%d", t)
//case C.GST_MESSAGE_APPLICATION: // application
case C.GST_MESSAGE_ELEMENT: // element
pMsg(srcName, "Element", "%v", msg)
//case C.GST_MESSAGE_SEGMENT_START: // segment start
//case C.GST_MESSAGE_SEGMENT_DONE: // segment done
case C.GST_MESSAGE_DURATION_CHANGED: // duration changed
pMsg(srcName, "Duration changed")
case C.GST_MESSAGE_LATENCY: // latency
pMsg(srcName, "Latency")
//case C.GST_MESSAGE_ASYNC_START: // async start
case C.GST_MESSAGE_ASYNC_DONE: // async done
C.gst_message_parse_async_done(msg, nil)
pMsg(srcName, "Async done")
//case C.GST_MESSAGE_REQUEST_STATE: // request state
//case C.GST_MESSAGE_STEP_START: // step start
//case C.GST_MESSAGE_QOS: // qos
//case C.GST_MESSAGE_PROGRESS: // progress
//case C.GST_MESSAGE_TOC: // toc
case C.GST_MESSAGE_RESET_TIME: // reset time
C.gst_message_parse_reset_time(msg, nil)
pMsg(srcName, "Reset time")
case C.GST_MESSAGE_STREAM_START: // stream start
pMsg(srcName, "Stream start")
//case C.GST_MESSAGE_NEED_CONTEXT: // need context
//case C.GST_MESSAGE_HAVE_CONTEXT: // have context
//case C.GST_MESSAGE_ANY: // any
default:
name := C.gst_message_type_get_name(msg._type)
p("message type %s\n", fromGStr(name))
panic("fixme")
}
C.gst_message_unref(msg)
}