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Rearrange function definitions in VideoReceiver.cc

QGC4.4
Jacob Walser 8 years ago
parent
62a4ba7729
commit
7f1e858c93
2 changed files with 180 additions and 174 deletions
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  1. 352
      src/VideoStreaming/VideoReceiver.cc
  2. 2
      src/VideoStreaming/VideoReceiver.h

352
src/VideoStreaming/VideoReceiver.cc
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@ -23,178 +23,6 @@ @@ -23,178 +23,6 @@
QGC_LOGGING_CATEGORY(VideoReceiverLog, "VideoReceiverLog")
// -EOS has appeared on the bus of the temporary pipeline
// -At this point all of the recoring elements have been flushed, and the video file has been finalized
// -Now we can remove the temporary pipeline and its elements
#if defined(QGC_GST_STREAMING)
void VideoReceiver::_eosCB(GstMessage* message)
{
Q_UNUSED(message)
gst_bin_remove(GST_BIN(_pipelineStopRec), _sink->queue);
gst_bin_remove(GST_BIN(_pipelineStopRec), _sink->mux);
gst_bin_remove(GST_BIN(_pipelineStopRec), _sink->filesink);
gst_element_set_state(_pipelineStopRec, GST_STATE_NULL);
gst_object_unref(_pipelineStopRec);
gst_element_set_state(_sink->filesink, GST_STATE_NULL);
gst_element_set_state(_sink->mux, GST_STATE_NULL);
gst_element_set_state(_sink->queue, GST_STATE_NULL);
gst_object_unref(_sink->queue);
gst_object_unref(_sink->mux);
gst_object_unref(_sink->filesink);
delete _sink;
_sink = NULL;
_recording = false;
emit recordingChanged();
qCDebug(VideoReceiverLog) << "Recording Stopped";
}
#endif
// -Unlink the recording branch from the tee in the main pipeline
// -Create a second temporary pipeline, and place the recording branch elements into that pipeline
// -Setup watch and handler for EOS event on the temporary pipeline's bus
// -Send an EOS event at the beginning of that pipeline and set up a callback for
#if defined(QGC_GST_STREAMING)
void VideoReceiver::_unlinkCB(GstPadProbeInfo* info)
{
Q_UNUSED(info)
// Also unlinks and unrefs
gst_bin_remove_many(GST_BIN(_pipeline), _sink->queue, _sink->mux, _sink->filesink, NULL);
// Give tee its pad back
gst_element_release_request_pad(_tee, _sink->teepad);
gst_object_unref(_sink->teepad);
// Create temporary pipeline
_pipelineStopRec = gst_pipeline_new("pipeStopRec");
// Put our elements from the recording branch into the temporary pipeline
gst_bin_add_many(GST_BIN(_pipelineStopRec), _sink->queue, _sink->mux, _sink->filesink, NULL);
gst_element_link_many(_sink->queue, _sink->mux, _sink->filesink, NULL);
// Add watch for EOS event
GstBus* bus = gst_pipeline_get_bus(GST_PIPELINE(_pipelineStopRec));
gst_bus_add_signal_watch(bus);
g_signal_connect(bus, "message::eos", G_CALLBACK(_eosCallBack), this);
gst_object_unref(bus);
if(gst_element_set_state(_pipelineStopRec, GST_STATE_PLAYING) == GST_STATE_CHANGE_FAILURE) {
qCDebug(VideoReceiverLog) << "problem starting _pipelineStopRec";
}
// Send EOS at the beginning of the pipeline
GstPad* sinkpad = gst_element_get_static_pad(_sink->queue, "sink");
gst_pad_send_event(sinkpad, gst_event_new_eos());
gst_object_unref(sinkpad);
qCDebug(VideoReceiverLog) << "Recording branch unlinked";
}
#endif
#if defined(QGC_GST_STREAMING)
gboolean VideoReceiver::_eosCallBack(GstBus* bus, GstMessage* message, gpointer user_data)
{
Q_UNUSED(bus)
Q_ASSERT(message != NULL && user_data != NULL);
VideoReceiver* pThis = (VideoReceiver*)user_data;
pThis->_eosCB(message);
return FALSE;
}
#endif
#if defined(QGC_GST_STREAMING)
GstPadProbeReturn VideoReceiver::_unlinkCallBack(GstPad* pad, GstPadProbeInfo* info, gpointer user_data)
{
Q_UNUSED(pad);
Q_ASSERT(info != NULL && user_data != NULL);
VideoReceiver* pThis = (VideoReceiver*)user_data;
// We will only execute once
if(!g_atomic_int_compare_and_exchange(&pThis->_sink->removing, FALSE, TRUE))
return GST_PAD_PROBE_REMOVE;
pThis->_unlinkCB(info);
return GST_PAD_PROBE_REMOVE;
}
#endif
// When we finish our pipeline will look like this:
//
// +-->queue-->decoder-->_videosink
// |
// datasource-->demux-->parser-->tee
// |
// | +--------------_sink-------------------+
// | | |
// we are adding these elements-> +->teepad-->queue-->matroskamux-->_filesink |
// | |
// +--------------------------------------+
void VideoReceiver::startRecording(void)
{
#if defined(QGC_GST_STREAMING)
qCDebug(VideoReceiverLog) << "startRecording()";
// exit immediately if we are already recording
if(_pipeline == NULL || _recording) {
qCDebug(VideoReceiverLog) << "Already recording!";
return;
}
_sink = g_new0(Sink, 1);
_sink->teepad = gst_element_get_request_pad(_tee, "src_%u");
_sink->queue = gst_element_factory_make("queue", NULL);
_sink->mux = gst_element_factory_make("matroskamux", NULL);
_sink->filesink = gst_element_factory_make("filesink", NULL);
_sink->removing = false;
QString fileName;
if(QSysInfo::WindowsVersion != QSysInfo::WV_None) {
fileName = _path + "\\QGC-" + QDateTime::currentDateTime().toString("yyyy-MM-dd-hh:mm:ss") + ".mkv";
} else {
fileName = _path + "/QGC-" + QDateTime::currentDateTime().toString("yyyy-MM-dd-hh:mm:ss") + ".mkv";
}
g_object_set(G_OBJECT(_sink->filesink), "location", qPrintable(fileName), NULL);
qCDebug(VideoReceiverLog) << "New video file:" << fileName;
gst_object_ref(_sink->queue);
gst_object_ref(_sink->mux);
gst_object_ref(_sink->filesink);
gst_bin_add_many(GST_BIN(_pipeline), _sink->queue, _sink->mux, _sink->filesink, NULL);
gst_element_link_many(_sink->queue, _sink->mux, _sink->filesink, NULL);
gst_element_sync_state_with_parent(_sink->queue);
gst_element_sync_state_with_parent(_sink->mux);
gst_element_sync_state_with_parent(_sink->filesink);
GstPad* sinkpad = gst_element_get_static_pad(_sink->queue, "sink");
gst_pad_link(_sink->teepad, sinkpad);
gst_object_unref(sinkpad);
_recording = true;
emit recordingChanged();
qCDebug(VideoReceiverLog) << "Recording started";
#endif
}
void VideoReceiver::stopRecording(void)
{
#if defined(QGC_GST_STREAMING)
qCDebug(VideoReceiverLog) << "stopRecording()";
// exit immediately if we are not recording
if(_pipeline == NULL || !_recording) {
qCDebug(VideoReceiverLog) << "Not recording!";
return;
}
// Wait for data block before unlinking
gst_pad_add_probe(_sink->teepad, GST_PAD_PROBE_TYPE_IDLE, _unlinkCallBack, this, NULL);
#endif
}
VideoReceiver::VideoReceiver(QObject* parent)
: QObject(parent)
, _running(false)
@ -559,3 +387,183 @@ gboolean VideoReceiver::_onBusMessage(GstBus* bus, GstMessage* msg, gpointer dat @@ -559,3 +387,183 @@ gboolean VideoReceiver::_onBusMessage(GstBus* bus, GstMessage* msg, gpointer dat
return TRUE;
}
#endif
// When we finish our pipeline will look like this:
//
// +-->queue-->decoder-->_videosink
// |
// datasource-->demux-->parser-->tee
// |
// | +--------------_sink-------------------+
// | | |
// we are adding these elements-> +->teepad-->queue-->matroskamux-->_filesink |
// | |
// +--------------------------------------+
void VideoReceiver::startRecording(void)
{
#if defined(QGC_GST_STREAMING)
qCDebug(VideoReceiverLog) << "startRecording()";
// exit immediately if we are already recording
if(_pipeline == NULL || _recording) {
qCDebug(VideoReceiverLog) << "Already recording!";
return;
}
_sink = g_new0(Sink, 1);
_sink->teepad = gst_element_get_request_pad(_tee, "src_%u");
_sink->queue = gst_element_factory_make("queue", NULL);
_sink->mux = gst_element_factory_make("matroskamux", NULL);
_sink->filesink = gst_element_factory_make("filesink", NULL);
_sink->removing = false;
if(!_sink->teepad || !_sink->queue || !_sink->mux || !_sink->filesink) {
qCritical() << "VideoReceiver::startRecording() failed to make _sink elements";
return;
}
QString fileName;
if(QSysInfo::WindowsVersion != QSysInfo::WV_None) {
fileName = _path + "\\QGC-" + QDateTime::currentDateTime().toString("yyyy-MM-dd-hh:mm:ss") + ".mkv";
} else {
fileName = _path + "/QGC-" + QDateTime::currentDateTime().toString("yyyy-MM-dd-hh:mm:ss") + ".mkv";
}
g_object_set(G_OBJECT(_sink->filesink), "location", qPrintable(fileName), NULL);
qCDebug(VideoReceiverLog) << "New video file:" << fileName;
gst_object_ref(_sink->queue);
gst_object_ref(_sink->mux);
gst_object_ref(_sink->filesink);
gst_bin_add_many(GST_BIN(_pipeline), _sink->queue, _sink->mux, _sink->filesink, NULL);
gst_element_link_many(_sink->queue, _sink->mux, _sink->filesink, NULL);
gst_element_sync_state_with_parent(_sink->queue);
gst_element_sync_state_with_parent(_sink->mux);
gst_element_sync_state_with_parent(_sink->filesink);
GstPad* sinkpad = gst_element_get_static_pad(_sink->queue, "sink");
gst_pad_link(_sink->teepad, sinkpad);
gst_object_unref(sinkpad);
_recording = true;
emit recordingChanged();
qCDebug(VideoReceiverLog) << "Recording started";
#endif
}
void VideoReceiver::stopRecording(void)
{
#if defined(QGC_GST_STREAMING)
qCDebug(VideoReceiverLog) << "stopRecording()";
// exit immediately if we are not recording
if(_pipeline == NULL || !_recording) {
qCDebug(VideoReceiverLog) << "Not recording!";
return;
}
// Wait for data block before unlinking
gst_pad_add_probe(_sink->teepad, GST_PAD_PROBE_TYPE_IDLE, _unlinkCallBack, this, NULL);
#endif
}
// This is only installed on the transient _pipelineStopRec in order
// to finalize a video file. It is not used for the main _pipeline.
// -EOS has appeared on the bus of the temporary pipeline
// -At this point all of the recoring elements have been flushed, and the video file has been finalized
// -Now we can remove the temporary pipeline and its elements
#if defined(QGC_GST_STREAMING)
void VideoReceiver::_eosCB(GstMessage* message)
{
Q_UNUSED(message)
gst_bin_remove(GST_BIN(_pipelineStopRec), _sink->queue);
gst_bin_remove(GST_BIN(_pipelineStopRec), _sink->mux);
gst_bin_remove(GST_BIN(_pipelineStopRec), _sink->filesink);
gst_element_set_state(_pipelineStopRec, GST_STATE_NULL);
gst_object_unref(_pipelineStopRec);
gst_element_set_state(_sink->filesink, GST_STATE_NULL);
gst_element_set_state(_sink->mux, GST_STATE_NULL);
gst_element_set_state(_sink->queue, GST_STATE_NULL);
gst_object_unref(_sink->queue);
gst_object_unref(_sink->mux);
gst_object_unref(_sink->filesink);
delete _sink;
_sink = NULL;
_recording = false;
emit recordingChanged();
qCDebug(VideoReceiverLog) << "Recording Stopped";
}
#endif
// -Unlink the recording branch from the tee in the main _pipeline
// -Create a second temporary pipeline, and place the recording branch elements into that pipeline
// -Setup watch and handler for EOS event on the temporary pipeline's bus
// -Send an EOS event at the beginning of that pipeline
#if defined(QGC_GST_STREAMING)
void VideoReceiver::_unlinkCB(GstPadProbeInfo* info)
{
Q_UNUSED(info)
// Also unlinks and unrefs
gst_bin_remove_many(GST_BIN(_pipeline), _sink->queue, _sink->mux, _sink->filesink, NULL);
// Give tee its pad back
gst_element_release_request_pad(_tee, _sink->teepad);
gst_object_unref(_sink->teepad);
// Create temporary pipeline
_pipelineStopRec = gst_pipeline_new("pipeStopRec");
// Put our elements from the recording branch into the temporary pipeline
gst_bin_add_many(GST_BIN(_pipelineStopRec), _sink->queue, _sink->mux, _sink->filesink, NULL);
gst_element_link_many(_sink->queue, _sink->mux, _sink->filesink, NULL);
// Add watch for EOS event
GstBus* bus = gst_pipeline_get_bus(GST_PIPELINE(_pipelineStopRec));
gst_bus_add_signal_watch(bus);
g_signal_connect(bus, "message::eos", G_CALLBACK(_eosCallBack), this);
gst_object_unref(bus);
if(gst_element_set_state(_pipelineStopRec, GST_STATE_PLAYING) == GST_STATE_CHANGE_FAILURE) {
qCDebug(VideoReceiverLog) << "problem starting _pipelineStopRec";
}
// Send EOS at the beginning of the pipeline
GstPad* sinkpad = gst_element_get_static_pad(_sink->queue, "sink");
gst_pad_send_event(sinkpad, gst_event_new_eos());
gst_object_unref(sinkpad);
qCDebug(VideoReceiverLog) << "Recording branch unlinked";
}
#endif
// This is only installed on the transient _pipelineStopRec in order
// to finalize a video file. It is not used for the main _pipeline.
#if defined(QGC_GST_STREAMING)
gboolean VideoReceiver::_eosCallBack(GstBus* bus, GstMessage* message, gpointer user_data)
{
Q_UNUSED(bus)
Q_ASSERT(message != NULL && user_data != NULL);
VideoReceiver* pThis = (VideoReceiver*)user_data;
pThis->_eosCB(message);
return FALSE;
}
#endif
#if defined(QGC_GST_STREAMING)
GstPadProbeReturn VideoReceiver::_unlinkCallBack(GstPad* pad, GstPadProbeInfo* info, gpointer user_data)
{
Q_UNUSED(pad);
Q_ASSERT(info != NULL && user_data != NULL);
VideoReceiver* pThis = (VideoReceiver*)user_data;
// We will only execute once
if(!g_atomic_int_compare_and_exchange(&pThis->_sink->removing, FALSE, TRUE))
return GST_PAD_PROBE_REMOVE;
pThis->_unlinkCB(info);
return GST_PAD_PROBE_REMOVE;
}
#endif

2
src/VideoStreaming/VideoReceiver.h
Unescape View File

@ -69,7 +69,6 @@ private slots: @@ -69,7 +69,6 @@ private slots:
private:
#if defined(QGC_GST_STREAMING)
typedef struct
{
GstPad* teepad;
@ -93,7 +92,6 @@ private: @@ -93,7 +92,6 @@ private:
static gboolean _onBusMessage(GstBus* bus, GstMessage* message, gpointer user_data);
static gboolean _eosCallBack(GstBus* bus, GstMessage* message, gpointer user_data);
static GstPadProbeReturn _unlinkCallBack(GstPad* pad, GstPadProbeInfo* info, gpointer user_data);
#endif
QString _uri;

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