C++ AudioProperties::channels方法代码示例

void getMp3Info(const WCHAR* fileName, MP3Info &info)
{
    TagLib::FileRef f(fileName);

    if (!f.isNull() && f.tag())
    {
        TagLib::Tag *tag = f.tag();

        info.tag[0] = tag->title().toWString();
        info.tag[1] = tag->artist().toWString();
        info.tag[2] = tag->album().toWString();
        info.tag[3] = tag->comment().toWString();
        info.tag[4] = tag->genre().toWString();
        info.year = tag->year();
        info.track = tag->track();

        TagLib::PropertyMap tags = f.file()->properties();

        if (!f.isNull() && f.audioProperties()) 
        {
            TagLib::AudioProperties *properties = f.audioProperties();

            int seconds = properties->length() % 60;
            int minutes = (properties->length() - seconds) / 60;

            info.bitrate = properties->bitrate();
            info.sample_rate = properties->sampleRate();
            info.channels = properties->channels();
            info.length_minutes = minutes;
            info.length_seconds = seconds;
        }
    }
}

int handle_file(const char* filepath, const char* filekey, AudioFileRecordStore& record_store)
{
    bool record_exists = record_store.find_record(filekey) != NULL;

    // Scanning a file for tags is expensive, so only do it if required.
    if(record_exists
            && !record_store.record_update_required(filekey))
    {
        // no update reqquired so has been handled.
        return 1;
    }

    TagLib::FileRef f(filepath);
    if (!f.isNull() && f.tag())
    {
        AudioFileRecord &record = record_store.get_record(filekey);
        record.update_start();

        if (verbose)
        {
            TagLib::Tag *tag = f.tag();
            std::cout << filepath << endl;
            std::cout << filekey << endl;
            std::cout << "-- TAG (basic) --" << endl;
            std::cout << "title   - \"" << tag->title()   << "\"" << endl;
            std::cout << "artist  - \"" << tag->artist()  << "\"" << endl;
            std::cout << "album   - \"" << tag->album()   << "\"" << endl;
            std::cout << "year    - \"" << tag->year()    << "\"" << endl;
            std::cout << "comment - \"" << tag->comment() << "\"" << endl;
            std::cout << "track   - \"" << tag->track()   << "\"" << endl;
            std::cout << "genre   - \"" << tag->genre()   << "\"" << endl;
        }

        TagLib::PropertyMap tags = f.file()->properties();

        for(TagLib::PropertyMap::ConstIterator i = tags.begin(); i != tags.end(); ++i)
        {
            for(TagLib::StringList::ConstIterator j = i->second.begin(); j != i->second.end(); ++j) 
            {
                record.update(i->first.toCString(true), j->toCString(true));
            }
        }

        if (f.audioProperties())
        {
            TagLib::AudioProperties *properties = f.audioProperties();
            record.update(audio_tags::BITRATE, properties->bitrate());
            record.update(audio_tags::LENGTH, properties->length());
            record.update(audio_tags::SAMPLERATE, properties->sampleRate());
            record.update(audio_tags::CHANNELS, properties->channels());
        }

        record.update_complete();
        return 1;
    }

    return 0;
}

int main(int argc, char *argv[])
{
  for(int i = 1; i < argc; i++) {

    cout << "******************** \"" << argv[i] << "\" ********************" << endl;

    TagLib::FileRef f(argv[i]);

    if(!f.isNull() && f.tag()) {

      TagLib::Tag *tag = f.tag();

      cout << "-- TAG (basic) --" << endl;
      cout << "title   - \"" << tag->title()   << "\"" << endl;
      cout << "artist  - \"" << tag->artist()  << "\"" << endl;
      cout << "album   - \"" << tag->album()   << "\"" << endl;
      cout << "year    - \"" << tag->year()    << "\"" << endl;
      cout << "comment - \"" << tag->comment() << "\"" << endl;
      cout << "track   - \"" << tag->track()   << "\"" << endl;
      cout << "genre   - \"" << tag->genre()   << "\"" << endl;

      TagLib::PropertyMap tags = f.file()->properties();

      unsigned int longest = 0;
      for(TagLib::PropertyMap::ConstIterator i = tags.begin(); i != tags.end(); ++i) {
        if (i->first.size() > longest) {
          longest = i->first.size();
        }
      }

      cout << "-- TAG (properties) --" << endl;
      for(TagLib::PropertyMap::ConstIterator i = tags.begin(); i != tags.end(); ++i) {
        for(TagLib::StringList::ConstIterator j = i->second.begin(); j != i->second.end(); ++j) {
          cout << left << std::setw(longest) << i->first << " - " << '"' << *j << '"' << endl;
        }
      }

    }

    if(!f.isNull() && f.audioProperties()) {

      TagLib::AudioProperties *properties = f.audioProperties();

      int seconds = properties->length() % 60;
      int minutes = (properties->length() - seconds) / 60;

      cout << "-- AUDIO --" << endl;
      cout << "bitrate     - " << properties->bitrate() << endl;
      cout << "sample rate - " << properties->sampleRate() << endl;
      cout << "channels    - " << properties->channels() << endl;
      cout << "length      - " << minutes << ":" << setfill('0') << setw(2) << seconds << endl;
    }
  }
  return 0;
}

int main(int argc, char *argv[])
{
    for(int i = 1; i < argc; i++) {

        cout << "******************** \"" << argv[i] << "\" ********************" << endl;

        TagLib::FileRef f(argv[i]);

        if(!f.isNull() && f.tag()) {

            TagLib::Tag *tag = f.tag();

            cout << "-- TAG --" << endl;
            cout << "title   - \"" << tag->title()   << "\"" << endl;
            cout << "artist  - \"" << tag->artist()  << "\"" << endl;
            cout << "album   - \"" << tag->album()   << "\"" << endl;
            cout << "year    - \"" << tag->year()    << "\"" << endl;
            cout << "comment - \"" << tag->comment() << "\"" << endl;
            cout << "track   - \"" << tag->track()   << "\"" << endl;
            cout << "genre   - \"" << tag->genre()   << "\"" << endl;
        }

        if(!f.isNull() && f.audioProperties()) {

            TagLib::AudioProperties *properties = f.audioProperties();

            int seconds = properties->length() % 60;
            int minutes = (properties->length() - seconds) / 60;

            cout << "-- AUDIO --" << endl;
            cout << "bitrate     - " << properties->bitrate() << endl;
            cout << "sample rate - " << properties->sampleRate() << endl;
            cout << "channels    - " << properties->channels() << endl;
            cout << "length      - " << minutes << ":" << formatSeconds(seconds) << endl;
        }
    }
    return 0;
}

bool mediaTag(Artwork *art, TagLib::File *f)
{
    Q_ASSERT(f != NULL);
    Q_ASSERT(f->tag());

    TagLib::Tag *tag = f->tag();
    art->filetype = FILETYPE_UNKNOWN;

    // The basic stuff!!!
    art->artist = TStringToQString(tag->artist()).trimmed();
    art->album = TStringToQString(tag->album()).trimmed();
    art->track = TStringToQString(tag->title()).trimmed();
    art->genre = TStringToQString(tag->genre()).trimmed();
    art->year = tag->year();
    art->trackNo = tag->track();

    // we need something to search on!
    if (art->artist == "" && art->album == "" && art->track == "") {
        return false;
    }

    // Any audio properties???
    if (f->audioProperties()) {
        TagLib::AudioProperties *properties = f->audioProperties();

        int seconds = properties->length() % 60;
        int minutes = (properties->length() - seconds) / 60;
        art->duration = minutes * 60 + seconds;

        art->bitRate = properties->bitrate();
        art->sampleRate = properties->sampleRate();
        art->channels = properties->channels();
    }

    art->makeSearchable();
    return true;
}

//.........这里部分代码省略.........
				if (seconds_total > 0) {
					int seconds = seconds_total % 60;
					int minutes = (seconds_total - seconds) / 60;
					int hours = minutes / 60;
					minutes = minutes % 60;
					if (hours > 0)
						duration.sprintf("%d:%02d:%02d", hours, minutes, seconds);
					else
						duration.sprintf("%d:%02d", minutes, seconds);
				} else {
					duration = "<Unknown duration>";
					*success = false;
				}
				res += duration;
			} else if (ch == 'D') {
				QString duration;
				if (seconds_total == 0) {
					duration = "<Unknown duration>";
					*success = false;
				} else {
					duration = QString::number(seconds_total);
				}
				res += duration;
			} else if (ch == 'B') {
				QString str = QString::number(ap->bitrate());
				if (str == "0") {
					str = "<Unknown bitrate>";
					*success = false;
				}
				res += str;
			} else if (ch == 's') {
				QString str = QString::number(ap->sampleRate() / (float)1000);
				if (str == "0") {
					str = "<Unknown sample rate>";
					*success = false;
				}
				res += str;
			} else if (ch == 'C') {
				QString str = QString::number(ap->channels());
				if (str == "0") {
					str = "<Unknown channels number>";
					*success = false;
				}
				res += str;
			} else if (ch == 'f') {
				res += QFileInfo(NTaglib::_filePath).baseName();
			} else if (ch == 'F') {
				res += QFileInfo(NTaglib::_filePath).fileName();
			} else if (ch == 'p') {
				res += QFileInfo(NTaglib::_filePath).absoluteFilePath();
			} else if (ch == 'e') {
				res += QFileInfo(NTaglib::_filePath).suffix();
			} else if (ch == 'E') {
				res += QFileInfo(NTaglib::_filePath).suffix().toUpper();
			} else if (ch == 'v') {
				res += QCoreApplication::applicationVersion();
			} else {
				res += ch;
			}
		} else if (format.at(i) == '{') {
			++i;
			int matchedAt = format.indexOf('}', i);
			if (matchedAt == -1) {
				res += "<condition error: unmatched '{'>";
				return res;
			}

			QString condition = format.mid(i, matchedAt - i);

			if (condition.indexOf('{') != -1) {
				res += "<condition error: extra '{'>";
				return res;
			}

			QStringList values = condition.split('|');
			if (values.count() < 2) {
				res += "<condition error: missing '|'>";
				return res;
			} else if (values.count() > 2) {
				res += "<condition error: extra '|'>";
				return res;
			}

			bool cond_res;
			QString cond_true = parse(values.at(0), &cond_res, true);
			if (cond_res) {
				res += cond_true;
			} else {
				res += parse(values.at(1), &cond_res);
			}
			i = matchedAt;
		} else {
			res += format.at(i);
		}
		if (!*success && stopOnFail)
			return "";
	}

	return res;
}

bool SoundSource::processTaglibFile(TagLib::File& f) {
    if (s_bDebugMetadata)
        qDebug() << "Parsing" << getFilename();

    if (f.isValid()) {
        TagLib::Tag *tag = f.tag();
        if (tag) {
            QString title = TStringToQString(tag->title());
            setTitle(title);

            QString artist = TStringToQString(tag->artist());
            setArtist(artist);

            QString album = TStringToQString(tag->album());
            setAlbum(album);

            QString comment = TStringToQString(tag->comment());
            setComment(comment);

            QString genre = TStringToQString(tag->genre());
            setGenre(genre);

            int iYear = tag->year();
            QString year = "";
            if (iYear > 0) {
                year = QString("%1").arg(iYear);
                setYear(year);
            }

            int iTrack = tag->track();
            QString trackNumber = "";
            if (iTrack > 0) {
                trackNumber = QString("%1").arg(iTrack);
                setTrackNumber(trackNumber);
            }

            if (s_bDebugMetadata)
                qDebug() << "TagLib" << "title" << title << "artist" << artist << "album" << album << "comment" << comment << "genre" << genre << "year" << year << "trackNumber" << trackNumber;
        }

        TagLib::AudioProperties *properties = f.audioProperties();
        if (properties) {
            int lengthSeconds = properties->length();
            int bitrate = properties->bitrate();
            int sampleRate = properties->sampleRate();
            int channels = properties->channels();

            if (s_bDebugMetadata)
                qDebug() << "TagLib" << "length" << lengthSeconds << "bitrate" << bitrate << "sampleRate" << sampleRate << "channels" << channels;

            setDuration(lengthSeconds);
            setBitrate(bitrate);
            setSampleRate(sampleRate);
            setChannels(channels);
        }

        // If we didn't get any audio properties, this was a failure.
        return (properties!=NULL);
    }
    return false;
}

int main(int argc, char *argv[])
{
  for(int i = 1; i < argc; i++) {

    cout << "******************** \"" << argv[i] << "\" ********************" << endl;

    TagLib::FileRef f(argv[i]);

    if(!f.isNull() && f.tag()) {

      TagLib::Tag *tag = f.tag();

      cout << "-- TAG --" << endl;
      cout << "title        - \"" << tag->title()   << "\"" << endl;
      cout << "artist       - \"" << tag->artist()  << "\"" << endl;
      cout << "album artist - \"" << tag->albumArtist()   << "\"" << endl;
      cout << "album        - \"" << tag->album()   << "\"" << endl;
      cout << "year         - \"" << tag->year()    << "\"" << endl;
      cout << "comment      - \"" << tag->comment() << "\"" << endl;
      cout << "track        - \"" << tag->track()   << "\"" << endl;
      cout << "genre        - \"" << tag->genre()   << "\"" << endl;
      cout << "grouping     - \"" << tag->grouping()   << "\"" << endl;
      TagLib::Ogg::XiphComment *comment = NULL;
      TagLib::FLAC::File *flac = dynamic_cast<TagLib::FLAC::File *>(f.file());
      if (flac) {
        cout << "flac:" << endl;
        cout << "id3v1   - \"" << flac->ID3v1Tag()   << "\"" << endl;
        cout << "id3v2   - \"" << flac->ID3v2Tag()   << "\"" << endl;
        cout << "xiph    - \"" << flac->xiphComment()   << "\"" << endl;
        comment = flac->xiphComment();
      }
      if (!comment) {
        comment = dynamic_cast<TagLib::Ogg::XiphComment *>(tag);
      }
      if (comment) {
        TagLib::Ogg::FieldListMap fields = comment->fieldListMap();
        for(TagLib::Ogg::FieldListMap::ConstIterator it = fields.begin(), end = fields.end(); it != end; it++) {
          if (!it->second.isEmpty())
            cout << "xiph:" << it->first << " \"" << it->second[0].substr(0,3) << "\"" << endl;
        }
      }
      cout << "pictures- \"" << f.file()->pictures().size()   << "\"" << endl;
      TagLib::File::PictureList l = f.file()->pictures();
      for (TagLib::File::_PictureList::ConstIterator i = l.begin(), end = l.end(); i != end; i++) {
        cout << "\t" << (*i)->typeName() << ' ' << (*i)->mimeType() << ' ' << (*i)->base64data().size() << endl;
      }
      
      cout << "pictures- \"" << tag->pictures().size()   << "\"" << endl;
    }

    if(!f.isNull() && f.audioProperties()) {

      TagLib::AudioProperties *properties = f.audioProperties();

      int seconds = properties->length() % 60;
      int minutes = (properties->length() - seconds) / 60;

      cout << "-- AUDIO --" << endl;
      cout << "bitrate     - " << properties->bitrate() << endl;
      cout << "sample rate - " << properties->sampleRate() << endl;
      cout << "channels    - " << properties->channels() << endl;
      cout << "length      - " << minutes << ":" << formatSeconds(seconds) << endl;
    }
  }
  return 0;
}

//.........这里部分代码省略.........

	if(!f.isNull() && f.audioProperties())
	{
		TagLib::AudioProperties *props = f.audioProperties();
		if(props->length())
		{
			int min = props->length()/60;
			int sec = props->length()%60;
			std::stringstream temp;
			temp << tr("Length") << ":\t";
			temp << min << ":";
			if(sec<=9)
				temp << "0";
			temp << sec << " " << tr("min");
			fileInfo.push_back(temp.str());
		}

		if(props->bitrate())
		{
			std::stringstream temp;
			temp << tr("Bitrate") << ":\t";
			temp << props->bitrate() << " kb/s";
			fileInfo.push_back(temp.str());
		}

		if(props->sampleRate())
		{
			std::stringstream temp;
			temp << tr("Samplerate") << ":\t";
			temp << props->sampleRate() << " Hz";
			fileInfo.push_back(temp.str());
		}

		if(props->channels())
		{
			std::stringstream temp;
			temp << tr("ID3$Channels") << ":\t";
			temp << props->channels();
			fileInfo.push_back(temp.str());
		}

		if(TagLib::MPEG::Properties* mpegProp = dynamic_cast<TagLib::MPEG::Properties*>(props))
		{
			#if 0
			std::stringstream temp;
			temp << tr("Original") << ":\t";
			temp << mpegProp->isOriginal();
			fileInfo.push_back(temp.str());
			#endif
			std::stringstream temp2;
			temp2 << tr("MPEG-Layer") << ":\t";
			temp2 << mpegProp->layer();
			fileInfo.push_back(temp2.str());
			#if 0
			std::stringstream temp3;
			temp3 << tr("Copyrighted") << ":\t";
			temp3 << mpegProp->isCopyrighted();
			fileInfo.push_back(temp3.str());

			std::stringstream temp4;
			temp4 << tr("Protected") << ":\t";
			temp4 << mpegProp->protectionEnabled();
			fileInfo.push_back(temp4.str());
			#endif
		}
	}