Clementine-audio-player-Mac.../src/devices/cddadevice.cpp

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/* This file is part of Clementine.
Copyright 2010, 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 <QMutexLocker>
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#include <gst/gst.h>
#include <gst/tag/tag.h>
#include <gst/audio/gstaudiocdsrc.h>
#include "core/logging.h"
#include "core/timeconstants.h"
#include "library/librarybackend.h"
#include "library/librarymodel.h"
#include "cddadevice.h"
CddaDevice::CddaDevice(const QUrl& url, DeviceLister* lister,
const QString& unique_id, DeviceManager* manager,
Application* app, int database_id, bool first_time)
: ConnectedDevice(url, lister, unique_id, manager, app, database_id,
first_time),
cdda_(nullptr),
cdio_(nullptr) {}
CddaDevice::~CddaDevice() {
if (cdio_) cdio_destroy(cdio_);
}
void CddaDevice::Init() {
QMutexLocker locker(&mutex_init_);
song_count_ = 0; // Reset song count, in case it was already set
cdio_ = cdio_open(url_.path().toLocal8Bit().constData(), DRIVER_DEVICE);
if (cdio_ == nullptr) {
return;
}
// Create gstreamer cdda element
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GError* error = nullptr;
cdda_ = gst_element_make_from_uri(GST_URI_SRC, "cdda://", nullptr, &error);
if (error) {
qLog(Error) << error->code << error->message;
}
if (cdda_ == nullptr) {
model_->Reset();
return;
}
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g_object_set(cdda_, "device", g_strdup(url_.path().toLocal8Bit().constData()),
nullptr);
if (g_object_class_find_property (G_OBJECT_GET_CLASS (cdda_), "paranoia-mode")) {
g_object_set (cdda_, "paranoia-mode", 0, NULL);
}
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// Change the element's state to ready and paused, to be able to query it
if (gst_element_set_state(cdda_, GST_STATE_READY) ==
GST_STATE_CHANGE_FAILURE ||
gst_element_set_state(cdda_, GST_STATE_PAUSED) ==
GST_STATE_CHANGE_FAILURE) {
model_->Reset();
gst_element_set_state(cdda_, GST_STATE_NULL);
gst_object_unref(GST_OBJECT(cdda_));
return;
}
// Get number of tracks
GstFormat fmt = gst_format_get_by_nick("track");
GstFormat out_fmt = fmt;
gint64 num_tracks = 0;
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if (!gst_element_query_duration(cdda_, out_fmt, &num_tracks) ||
out_fmt != fmt) {
qLog(Error) << "Error while querying cdda GstElement";
model_->Reset();
gst_object_unref(GST_OBJECT(cdda_));
return;
}
SongList songs;
for (int track_number = 1; track_number <= num_tracks; track_number++) {
// Init song
Song song;
song.set_id(track_number);
song.set_valid(true);
song.set_filetype(Song::Type_Cdda);
song.set_url(
QUrl(QString("cdda://%1/%2").arg(url_.path()).arg(track_number)));
song.set_title(QString("Track %1").arg(track_number));
song.set_track(track_number);
songs << song;
}
song_count_ = num_tracks;
connect(this, SIGNAL(SongsDiscovered(const SongList&)), model_,
SLOT(SongsDiscovered(const SongList&)));
// Reset the model before emitting the SongsDiscovered signal. This
// ensures that the model is updated properly even when a disc that
// doesn't exist in MusicBrainz is inserted.
model_->Reset();
emit SongsDiscovered(songs);
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gst_tag_register_musicbrainz_tags();
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GstElement* pipeline = gst_pipeline_new("pipeline");
GstElement* sink = gst_element_factory_make ("fakesink", NULL);
gst_bin_add_many (GST_BIN (pipeline), cdda_, sink, NULL);
gst_element_link (cdda_, sink);
gst_element_set_state(pipeline, GST_STATE_READY);
gst_element_set_state(pipeline, GST_STATE_PAUSED);
// Get TOC and TAG messages
GstMessage* msg = nullptr;
GstMessage* msg_toc = nullptr;
GstMessage* msg_tag = nullptr;
while ((msg = gst_bus_timed_pop_filtered(GST_ELEMENT_BUS(pipeline),
GST_SECOND, (GstMessageType)(GST_MESSAGE_TOC | GST_MESSAGE_TAG)))) {
if (GST_MESSAGE_TYPE(msg) == GST_MESSAGE_TOC) {
if (msg_toc) gst_message_unref(msg_toc); // Shouldn't happen, but just in case
msg_toc = msg;
} else if (GST_MESSAGE_TYPE(msg) == GST_MESSAGE_TAG) {
if (msg_tag) gst_message_unref(msg_tag);
msg_tag = msg;
}
}
// Handle TOC message: get tracks duration
if (msg_toc) {
GstToc* toc;
gst_message_parse_toc (msg_toc, &toc, nullptr);
if (toc) {
GList* entries = gst_toc_get_entries(toc);
if (entries && songs.size() <= g_list_length (entries)) {
int i = 0;
for (GList* node = entries; node != nullptr; node = node->next) {
GstTocEntry *entry = static_cast<GstTocEntry*>(node->data);
quint64 duration = 0;
gint64 start, stop;
if (gst_toc_entry_get_start_stop_times (entry, &start, &stop))
duration = stop - start;
songs[i++].set_length_nanosec(duration);
}
}
}
gst_message_unref(msg_toc);
}
// Update songs with duration
model_->Reset();
emit SongsDiscovered(songs);
song_count_ = songs.size();
// Handle TAG message: generate MusicBrainz DiscId
if (msg_tag) {
GstTagList* tags = nullptr;
gst_message_parse_tag(msg_tag, &tags);
char* string_mb = nullptr;
if (gst_tag_list_get_string(tags, GST_TAG_CDDA_MUSICBRAINZ_DISCID,
&string_mb)) {
QString musicbrainz_discid(string_mb);
qLog(Info) << "MusicBrainz discid: " << musicbrainz_discid;
MusicBrainzClient* musicbrainz_client = new MusicBrainzClient(this);
connect(musicbrainz_client, SIGNAL(Finished(const QString&, const QString&,
MusicBrainzClient::ResultList)),
SLOT(AudioCDTagsLoaded(const QString&, const QString&,
MusicBrainzClient::ResultList)));
musicbrainz_client->StartDiscIdRequest(musicbrainz_discid);
g_free(string_mb);
gst_message_unref(msg_tag);
gst_tag_list_free(tags);
}
}
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gst_element_set_state(pipeline, GST_STATE_NULL);
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// This will also cause cdda_ to be unref'd.
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gst_object_unref(pipeline);
}
void CddaDevice::AudioCDTagsLoaded(
const QString& artist, const QString& album,
const MusicBrainzClient::ResultList& results) {
MusicBrainzClient* musicbrainz_client =
qobject_cast<MusicBrainzClient*>(sender());
musicbrainz_client->deleteLater();
SongList songs;
int track_number = 1;
if (results.size() == 0) return;
model_->Reset();
for (const MusicBrainzClient::Result& ret : results) {
Song song;
song.set_artist(artist);
song.set_album(album);
song.set_title(ret.title_);
song.set_length_nanosec(ret.duration_msec_ * kNsecPerMsec);
song.set_track(track_number);
song.set_year(ret.year_);
song.set_id(track_number);
// We need to set url: that's how playlist will find the correct item to
// update
song.set_url(
QUrl(QString("cdda://%1/%2").arg(unique_id()).arg(track_number++)));
songs << song;
}
connect(this, SIGNAL(SongsDiscovered(const SongList&)), model_,
SLOT(SongsDiscovered(const SongList&)));
emit SongsDiscovered(songs);
song_count_ = songs.size();
}
void CddaDevice::Refresh() {
if ((cdio_ && cdda_) && /* already init... */
cdio_get_media_changed(cdio_) !=
1 /* ...and hasn't change since last time */) {
return;
}
// Check if mutex is already token (i.e. init is already taking place)
if (!mutex_init_.tryLock()) {
return;
}
mutex_init_.unlock();
Init();
}