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Clementine/src/moodbar/moodbarpipeline.cpp
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| /* This file is part of Clementine. | |
| Copyright 2012, David Sansome <me@davidsansome.com> | |
| Clementine is free software: you can redistribute it and/or modify | |
| it under the terms of the GNU General Public License as published by | |
| the Free Software Foundation, either version 3 of the License, or | |
| (at your option) any later version. | |
| Clementine is distributed in the hope that it will be useful, | |
| but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| GNU General Public License for more details. | |
| You should have received a copy of the GNU General Public License | |
| along with Clementine. If not, see <http://www.gnu.org/licenses/>. | |
| */ | |
| #include "moodbarpipeline.h" | |
| #include <QCoreApplication> | |
| #include <QThread> | |
| #include <QUrl> | |
| #include "core/logging.h" | |
| #include "core/signalchecker.h" | |
| #include "core/timeconstants.h" | |
| #include "core/utilities.h" | |
| #include "moodbar/moodbarbuilder.h" | |
| #include "gst/moodbar/gstfastspectrum.h" | |
| bool MoodbarPipeline::sIsAvailable = false; | |
| const int MoodbarPipeline::kBands = 128; | |
| MoodbarPipeline::MoodbarPipeline(const QUrl& local_filename) | |
| : QObject(nullptr), | |
| local_filename_(local_filename), | |
| pipeline_(nullptr), | |
| convert_element_(nullptr), | |
| success_(false) {} | |
| MoodbarPipeline::~MoodbarPipeline() { Cleanup(); } | |
| bool MoodbarPipeline::IsAvailable() { | |
| if (!sIsAvailable) { | |
| GstElementFactory* factory = gst_element_factory_find("fftwspectrum"); | |
| if (!factory) { | |
| return false; | |
| } | |
| gst_object_unref(factory); | |
| sIsAvailable = true; | |
| } | |
| return sIsAvailable; | |
| } | |
| GstElement* MoodbarPipeline::CreateElement(const QString& factory_name) { | |
| GstElement* ret = | |
| gst_element_factory_make(factory_name.toAscii().constData(), nullptr); | |
| if (ret) { | |
| gst_bin_add(GST_BIN(pipeline_), ret); | |
| } else { | |
| qLog(Warning) << "Unable to create gstreamer element" << factory_name; | |
| } | |
| return ret; | |
| } | |
| void MoodbarPipeline::Start() { | |
| Q_ASSERT(QThread::currentThread() != qApp->thread()); | |
| Utilities::SetThreadIOPriority(Utilities::IOPRIO_CLASS_IDLE); | |
| if (pipeline_) { | |
| return; | |
| } | |
| pipeline_ = gst_pipeline_new("moodbar-pipeline"); | |
| GstElement* decodebin = CreateElement("uridecodebin"); | |
| convert_element_ = CreateElement("audioconvert"); | |
| GstElement* spectrum = CreateElement("fastspectrum"); | |
| GstElement* fakesink = CreateElement("fakesink"); | |
| if (!decodebin || !convert_element_ || !spectrum || !fakesink) { | |
| pipeline_ = nullptr; | |
| emit Finished(false); | |
| return; | |
| } | |
| // Join them together | |
| if (!gst_element_link(convert_element_, spectrum) || | |
| !gst_element_link(spectrum, fakesink)) { | |
| qLog(Error) << "Failed to link elements"; | |
| pipeline_ = nullptr; | |
| emit Finished(false); | |
| return; | |
| } | |
| builder_.reset(new MoodbarBuilder); | |
| // Set properties | |
| g_object_set(decodebin, "uri", local_filename_.toEncoded().constData(), | |
| nullptr); | |
| g_object_set(spectrum, "bands", kBands, nullptr); | |
| GstFastSpectrum* fast_spectrum = GST_FASTSPECTRUM(spectrum); | |
| fast_spectrum->output_callback = [this]( | |
| double* magnitudes, int size) { builder_->AddFrame(magnitudes, size); }; | |
| // Connect signals | |
| CHECKED_GCONNECT(decodebin, "pad-added", &NewPadCallback, this); | |
| GstBus* bus = gst_pipeline_get_bus(GST_PIPELINE(pipeline_)); | |
| gst_bus_set_sync_handler(bus, BusCallbackSync, this, nullptr); | |
| gst_object_unref(bus); | |
| // Start playing | |
| gst_element_set_state(pipeline_, GST_STATE_PLAYING); | |
| } | |
| void MoodbarPipeline::ReportError(GstMessage* msg) { | |
| GError* error; | |
| gchar* debugs; | |
| gst_message_parse_error(msg, &error, &debugs); | |
| QString message = QString::fromLocal8Bit(error->message); | |
| g_error_free(error); | |
| free(debugs); | |
| qLog(Error) << "Error processing" << local_filename_ << ":" << message; | |
| } | |
| void MoodbarPipeline::NewPadCallback(GstElement*, GstPad* pad, gpointer data) { | |
| MoodbarPipeline* self = reinterpret_cast<MoodbarPipeline*>(data); | |
| GstPad* const audiopad = | |
| gst_element_get_static_pad(self->convert_element_, "sink"); | |
| if (GST_PAD_IS_LINKED(audiopad)) { | |
| qLog(Warning) << "audiopad is already linked, unlinking old pad"; | |
| gst_pad_unlink(audiopad, GST_PAD_PEER(audiopad)); | |
| } | |
| gst_pad_link(pad, audiopad); | |
| gst_object_unref(audiopad); | |
| int rate = 0; | |
| GstCaps* caps = gst_pad_get_current_caps(pad); | |
| GstStructure* structure = gst_caps_get_structure(caps, 0); | |
| gst_structure_get_int(structure, "rate", &rate); | |
| gst_caps_unref(caps); | |
| self->builder_->Init(kBands, rate); | |
| } | |
| GstBusSyncReply MoodbarPipeline::BusCallbackSync(GstBus*, GstMessage* msg, | |
| gpointer data) { | |
| MoodbarPipeline* self = reinterpret_cast<MoodbarPipeline*>(data); | |
| switch (GST_MESSAGE_TYPE(msg)) { | |
| case GST_MESSAGE_EOS: | |
| self->Stop(true); | |
| break; | |
| case GST_MESSAGE_ERROR: | |
| self->ReportError(msg); | |
| self->Stop(false); | |
| break; | |
| default: | |
| break; | |
| } | |
| return GST_BUS_PASS; | |
| } | |
| void MoodbarPipeline::Stop(bool success) { | |
| success_ = success; | |
| if (builder_ != nullptr) { | |
| data_ = builder_->Finish(1000); | |
| builder_.reset(); | |
| } | |
| emit Finished(success); | |
| } | |
| void MoodbarPipeline::Cleanup() { | |
| Q_ASSERT(QThread::currentThread() == thread()); | |
| Q_ASSERT(QThread::currentThread() != qApp->thread()); | |
| if (pipeline_) { | |
| GstBus* bus = gst_pipeline_get_bus(GST_PIPELINE(pipeline_)); | |
| gst_bus_set_sync_handler(bus, nullptr, nullptr, nullptr); | |
| gst_object_unref(bus); | |
| gst_element_set_state(pipeline_, GST_STATE_NULL); | |
| gst_object_unref(pipeline_); | |
| pipeline_ = nullptr; | |
| } | |
| } |