void
pad_added_cb (GstElement *src, GstPad *new_pad, MbMedia *media)
{
GstCaps *new_pad_caps = NULL;
GstStructure *new_pad_struct = NULL;
GstPad *peer = NULL;
const gchar *new_pad_type = NULL;
gboolean success = FALSE;
g_assert (media);
g_debug ("Received new pad '%s' from '%s'\n", GST_PAD_NAME(new_pad),
media->name);
new_pad_caps = gst_pad_query_caps (new_pad, NULL);
new_pad_struct = gst_caps_get_structure (new_pad_caps, 0);
new_pad_type = gst_structure_get_name (new_pad_struct);
g_debug ("New pad type: %s\n", new_pad_type);
g_mutex_lock(&(media->mutex));
media->valid_pads++;
if (g_str_has_prefix(new_pad_type, "video"))
{
success = set_video_bin (media->bin, media, new_pad);
if (success)
peer = gst_element_get_static_pad(_mb_global_data.video_mixer,
media->video_pad_name);
}
else if (g_str_has_prefix(new_pad_type, "audio"))
{
success = set_audio_bin (media->bin, media, new_pad);
if (success)
peer = gst_element_get_static_pad(_mb_global_data.audio_mixer,
media->audio_pad_name);
}
if (success)
{
gst_pad_set_offset (new_pad, media->start_offset);
if (peer != NULL)
{
gst_pad_add_probe (peer, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM,
eos_event_cb, media, NULL);
gst_object_unref(peer);
}
}
g_mutex_unlock(&(media->mutex));
if (new_pad_caps != NULL)
gst_caps_unref (new_pad_caps);
}
static void on_new_decoded_pad(GstElement *introdec,
GstPad *srcpad,
gpointer data)
{
GstPadLinkReturn result;
GstPad *sinkpad;
GstCaps *new_pad_caps;
CustomData *cdata=(CustomData*)data;
GstElement *introbin=cdata->introbin;
new_pad_caps=gst_pad_query_caps(srcpad,NULL);
g_print("Caps:%s\n",gst_caps_to_string(new_pad_caps));
/* Setup src pad offset, sync with pipeline. */
gint64 pos2;
pos2=gst_element_get_base_time(cdata->pipeline);
GstClock *clock;
clock=gst_pipeline_get_clock(GST_PIPELINE(cdata->pipeline));
GstClockTime clock_time;
clock_time=gst_clock_get_time(clock);
gst_object_unref(clock);
// g_print("Pipeline times: base_time=%lld\n clock_time=%lld\n",
// pos2,clock_time);
gst_pad_set_offset(srcpad,clock_time-pos2);
cdata->introbin_offset=clock_time-pos2;
if(strncmp(gst_caps_to_string(new_pad_caps),"video",5)==0) {
GstElement *vqueue;
vqueue=gst_bin_get_by_name(GST_BIN(introbin),"introscale");
sinkpad=gst_element_get_static_pad(vqueue,"sink");
result=gst_pad_link(srcpad,sinkpad);
if(result!=GST_PAD_LINK_OK) {
g_printerr("Couldn't link introbin decodebin video pad...\n");
}
gst_object_unref(vqueue);
}
if(strncmp(gst_caps_to_string(new_pad_caps),"audio",5)==0) {
GstElement *arate;
arate=gst_bin_get_by_name(GST_BIN(introbin),"introaudiorate");
sinkpad=gst_element_get_static_pad(arate,"sink");
result=gst_pad_link(srcpad,sinkpad);
if(result!=GST_PAD_LINK_OK) {
GstCaps *peer_caps;
peer_caps=gst_pad_query_caps(sinkpad,NULL);
g_print("SinkCaps:%s\n",gst_caps_to_string(peer_caps));
g_printerr("Couldn't link introbin decodebin audio pad...\n");
gst_caps_unref(peer_caps);
}
gst_object_unref(arate);
}
}
gboolean introbin_set_pad_offset(CustomData *data)
{
gint64 pos2;
pos2=gst_element_get_base_time(data->pipeline);
GstClock *clock;
clock=gst_pipeline_get_clock(GST_PIPELINE(data->pipeline));
GstClockTime clock_time;
clock_time=gst_clock_get_time(clock);
gst_object_unref(clock);
g_print("Pipeline times: base_time=%lld\n clock_time=%lld",
pos2,clock_time);
GstElement *dec=gst_bin_get_by_name(GST_BIN(data->introbin),"introdec");
GstPad *src_pad1,*src_pad2;
src_pad1=gst_element_get_static_pad(GST_ELEMENT(dec),"src_0");
gst_pad_set_offset(src_pad1,clock_time-pos2);
gst_object_unref(src_pad1);
src_pad2=gst_element_get_static_pad(GST_ELEMENT(dec),"src_1");
gst_pad_set_offset(src_pad2,clock_time-pos2);
gst_object_unref(src_pad2);
return TRUE;
}
GstPadProbeReturn GstEnginePipeline::DecodebinProbe(GstPad* pad,
GstPadProbeInfo* info,
gpointer data) {
GstEnginePipeline* instance = reinterpret_cast<GstEnginePipeline*>(data);
const GstPadProbeType info_type = GST_PAD_PROBE_INFO_TYPE(info);
if (info_type & GST_PAD_PROBE_TYPE_BUFFER) {
// The decodebin produced a buffer. Record its end time, so we can offset
// the buffers produced by the next decodebin when transitioning to the next
// song.
GstBuffer* buffer = GST_PAD_PROBE_INFO_BUFFER(info);
GstClockTime timestamp = GST_BUFFER_TIMESTAMP(buffer);
GstClockTime duration = GST_BUFFER_DURATION(buffer);
if (timestamp == GST_CLOCK_TIME_NONE) {
timestamp = instance->last_decodebin_segment_.position;
}
if (duration != GST_CLOCK_TIME_NONE) {
timestamp += duration;
}
instance->last_decodebin_segment_.position = timestamp;
} else if (info_type & GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM) {
GstEvent* event = GST_PAD_PROBE_INFO_EVENT(info);
GstEventType event_type = GST_EVENT_TYPE(event);
if (event_type == GST_EVENT_SEGMENT) {
// A new segment started, we need to save this to calculate running time
// offsets later.
gst_event_copy_segment(event, &instance->last_decodebin_segment_);
} else if (event_type == GST_EVENT_FLUSH_START) {
// A flushing seek resets the running time to 0, so remove any offset
// we set on this pad before.
gst_pad_set_offset(pad, 0);
}
}
return GST_PAD_PROBE_OK;
}
void GstEnginePipeline::NewPadCallback(GstElement*, GstPad* pad,
gpointer self) {
GstEnginePipeline* instance = reinterpret_cast<GstEnginePipeline*>(self);
GstPad* const audiopad =
gst_element_get_static_pad(instance->audiobin_, "sink");
// Link decodebin's sink pad to audiobin's src pad.
if (GST_PAD_IS_LINKED(audiopad)) {
qLog(Warning) << instance->id()
<< "audiopad is already linked, unlinking old pad";
gst_pad_unlink(audiopad, GST_PAD_PEER(audiopad));
}
gst_pad_link(pad, audiopad);
gst_object_unref(audiopad);
// Offset the timestamps on all the buffers coming out of the decodebin so
// they line up exactly with the end of the last buffer from the old
// decodebin.
// "Running time" is the time since the last flushing seek.
GstClockTime running_time = gst_segment_to_running_time(
&instance->last_decodebin_segment_, GST_FORMAT_TIME,
instance->last_decodebin_segment_.position);
gst_pad_set_offset(pad, running_time);
// Add a probe to the pad so we can update last_decodebin_segment_.
gst_pad_add_probe(
pad, static_cast<GstPadProbeType>(GST_PAD_PROBE_TYPE_BUFFER |
GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM |
GST_PAD_PROBE_TYPE_EVENT_FLUSH),
DecodebinProbe, instance, nullptr);
instance->pipeline_is_connected_ = true;
if (instance->pending_seek_nanosec_ != -1 &&
instance->pipeline_is_initialised_) {
QMetaObject::invokeMethod(instance, "Seek", Qt::QueuedConnection,
Q_ARG(qint64, instance->pending_seek_nanosec_));
}
}
