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Destroy gstreamer transcoding pipelines properly so the input and output files are closed, and can be read again on Windows.

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This commit is contained in:
David Sansome 2011-11-29 16:57:11 +00:00
parent a00d7e1738
commit 91b4cfcb68
3 changed files with 30 additions and 22 deletions
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42
src/transcoder/transcoder.cpp
View File

@ -401,17 +401,16 @@ bool Transcoder::StartJob(const Job &job) {
// Create the pipeline.
// This should be a scoped_ptr, but scoped_ptr doesn't support custom
// destructors.
state->pipeline_.reset(gst_pipeline_new("pipeline"),
boost::bind(gst_object_unref, _1));
state->pipeline_ = gst_pipeline_new("pipeline");
if (!state->pipeline_) return false;
// Create all the elements
GstElement* src = CreateElement("filesrc", state->pipeline_.get());
GstElement* decode = CreateElement("decodebin2", state->pipeline_.get());
GstElement* convert = CreateElement("audioconvert", state->pipeline_.get());
GstElement* codec = CreateElementForMimeType("Codec/Encoder/Audio", job.preset.codec_mimetype_, state->pipeline_.get());
GstElement* muxer = CreateElementForMimeType("Codec/Muxer", job.preset.muxer_mimetype_, state->pipeline_.get());
GstElement* sink = CreateElement("filesink", state->pipeline_.get());
GstElement* src = CreateElement("filesrc", state->pipeline_);
GstElement* decode = CreateElement("decodebin2", state->pipeline_);
GstElement* convert = CreateElement("audioconvert", state->pipeline_);
GstElement* codec = CreateElementForMimeType("Codec/Encoder/Audio", job.preset.codec_mimetype_, state->pipeline_);
GstElement* muxer = CreateElementForMimeType("Codec/Muxer", job.preset.muxer_mimetype_, state->pipeline_);
GstElement* sink = CreateElement("filesink", state->pipeline_);
if (!src || !decode || !convert || !sink)
return false;
@ -445,11 +444,11 @@ bool Transcoder::StartJob(const Job &job) {
state->convert_element_ = convert;
g_signal_connect(decode, "new-decoded-pad", G_CALLBACK(NewPadCallback), state.get());
gst_bus_set_sync_handler(gst_pipeline_get_bus(GST_PIPELINE(state->pipeline_.get())), BusCallbackSync, state.get());
state->bus_callback_id_ = gst_bus_add_watch(gst_pipeline_get_bus(GST_PIPELINE(state->pipeline_.get())), BusCallback, state.get());
gst_bus_set_sync_handler(gst_pipeline_get_bus(GST_PIPELINE(state->pipeline_)), BusCallbackSync, state.get());
state->bus_callback_id_ = gst_bus_add_watch(gst_pipeline_get_bus(GST_PIPELINE(state->pipeline_)), BusCallback, state.get());
// Start the pipeline
gst_element_set_state(state->pipeline_.get(), GST_STATE_PLAYING);
gst_element_set_state(state->pipeline_, GST_STATE_PLAYING);
// GStreamer now transcodes in another thread, so we can return now and do
// something else. Keep the JobState object around. It'll post an event
@ -459,6 +458,13 @@ bool Transcoder::StartJob(const Job &job) {
return true;
}
Transcoder::JobState::~JobState() {
if (pipeline_) {
gst_element_set_state(pipeline_, GST_STATE_NULL);
gst_object_unref(pipeline_);
}
}
bool Transcoder::event(QEvent* e) {
if (e->type() == JobFinishedEvent::sEventType) {
JobFinishedEvent* finished_event = static_cast<JobFinishedEvent*>(e);
@ -481,7 +487,7 @@ bool Transcoder::event(QEvent* e) {
// Remove event handlers from the gstreamer pipeline so they don't get
// called after the pipeline is shutting down
gst_bus_set_sync_handler(gst_pipeline_get_bus(GST_PIPELINE(
finished_event->state_->pipeline_.get())), NULL, NULL);
finished_event->state_->pipeline_)), NULL, NULL);
g_source_remove(finished_event->state_->bus_callback_id_);
// Remove it from the list - this will also destroy the GStreamer pipeline
@ -510,14 +516,14 @@ void Transcoder::Cancel() {
// Remove event handlers from the gstreamer pipeline so they don't get
// called after the pipeline is shutting down
gst_bus_set_sync_handler(gst_pipeline_get_bus(GST_PIPELINE(
state->pipeline_.get())), NULL, NULL);
gst_bus_set_sync_handler(gst_pipeline_get_bus(
GST_PIPELINE(state->pipeline_)), NULL, NULL);
g_source_remove(state->bus_callback_id_);
// Stop the pipeline
if (gst_element_set_state(state->pipeline_.get(), GST_STATE_NULL) == GST_STATE_CHANGE_ASYNC) {
if (gst_element_set_state(state->pipeline_, GST_STATE_NULL) == GST_STATE_CHANGE_ASYNC) {
// Wait for it to finish stopping...
gst_element_get_state(state->pipeline_.get(), NULL, NULL, GST_CLOCK_TIME_NONE);
gst_element_get_state(state->pipeline_, NULL, NULL, GST_CLOCK_TIME_NONE);
}
// Remove the job, this destroys the GStreamer pipeline too
@ -536,8 +542,8 @@ QMap<QString, float> Transcoder::GetProgress() const {
gint64 duration = 0;
GstFormat format = GST_FORMAT_TIME;
gst_element_query_position(state->pipeline_.get(), &format, &position);
gst_element_query_duration(state->pipeline_.get(), &format, &duration);
gst_element_query_position(state->pipeline_, &format, &position);
gst_element_query_duration(state->pipeline_, &format, &duration);
ret[state->job_.input] = float(position) / duration;
}

6
src/transcoder/transcoder.h
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@ -91,14 +91,16 @@ class Transcoder : public QObject {
// job's thread.
struct JobState {
JobState(const Job& job, Transcoder* parent)
: job_(job), parent_(parent), convert_element_(NULL), bus_callback_id_(0) {}
: job_(job), parent_(parent), pipeline_(NULL), convert_element_(NULL),
bus_callback_id_(0) {}
~JobState();
void PostFinished(bool success);
void ReportError(GstMessage* msg);
Job job_;
Transcoder* parent_;
boost::shared_ptr<GstElement> pipeline_;
GstElement* pipeline_;
GstElement* convert_element_;
int bus_callback_id_;
};

4
src/translations/translations.pot
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@ -1070,14 +1070,14 @@ msgid ""
"required GStreamer plugins installed"
msgstr ""
#: transcoder/transcoder.cpp:426
#: transcoder/transcoder.cpp:425
#, qt-format
msgid ""
"Couldn't find a muxer for %1, check you have the correct GStreamer plugins "
"installed"
msgstr ""
#: transcoder/transcoder.cpp:420
#: transcoder/transcoder.cpp:419
#, qt-format
msgid ""
"Couldn't find an encoder for %1, check you have the correct GStreamer "