qmsongitem.cpp

可以播放MP3,wma等文件格式的播放器

		QmMarkManager::instance()->insert(filePath());
	else
		QmMarkManager::instance()->remove(filePath());
	
	repaint();
}


/*!
  Sets the bitrate to \a bitrate.
*/

void
QmSongItem::setBitrate(
	int bitrate)
{
    m_Bitrate = bitrate;
}


/*!
  Sets the rating to \a rating.
 */

void
QmSongItem::setRating(
	int rating)
{
	m_Rating = rating;	
}


/*!
  Increases the rating by one and returns the new value.

  \sa decRating()
*/

int
QmSongItem::incRating()
{
	return ++m_Rating;
}


/*!
  Decreases the rating by one and returns the new value.

  \sa incRating()
*/

int
QmSongItem::decRating()
{
	return --m_Rating;
}


/*!
  \sa resetPlayed()
 */

int
QmSongItem::played() const
{
	return m_Played;
}


/*!
  \sa played()
 */

void
QmSongItem::resetPlayed()
{
	m_Played = 0;
}


/*!

 */

void
QmSongItem::setVariableBitrate(
	bool vbr)
{
	m_VariableBitrate = vbr;
}


/*!

*/

void
QmSongItem::setDisplayFormat(
	const QString &format,
	const QString &multiFormat)
{
	setDisplayFormat(format.latin1(), multiFormat.latin1());
}


/*!
  Sets the format of the name displayed in the playlist to \a format.

  Code licensed from Espen Skoglund <[e-mail]>, and H鍁ard Kv錶en
  <[e-mail]> of http://www.xmms.org.
*/

void
QmSongItem::setDisplayFormat(
	const char* singleFormat,
	const char* multiFormat)
{
	char c, *p, outbuf[256], convert[16], *string;
	int numdigits, numpr, val, size, i;
	int width, precision;
	bool f_left, f_space, f_zero, more_flags;
	bool did_output = false;
	char digits[] = "0123456789";
	QString tmp;

	const char *format = m_MultiArtistAlbum ? multiFormat : singleFormat;
	
#define PUTCH(ch) \
	do { \
		if ( size-- <= 0 ) \
			goto Done; \
		*p++ = (ch); \
	} while (0)

#define LEFTPAD(num) \
	do { \
    	int cnt = (num); \
		if ( ! f_left && cnt > 0 ) \
            while ( cnt-- > 0 ) \
                PUTCH(f_zero ? '0' : ' '); \
	} while (0)

#define RIGHTPAD(num) \
	do { \
		int cnt = (num); \
		if ( f_left && cnt > 0 ) \
			while ( cnt-- > 0 ) \
				PUTCH( ' ' ); \
	} while (0)

	size = sizeof (outbuf) - 1;
	p = outbuf;
	
	if ( format == 0 )
		return;
	
	while (size > 0)
	{
		/* Copy characters until we encounter '%'. */
		while ((c = *format++) != '%')
		{
			if (size-- <= 0 || c == '\0')
				goto Done;
			*p++ = c;
		}

		f_left = f_space = f_zero = false;
		more_flags = true;

		/* Parse flags. */
		while (more_flags)
		{
			switch (*format)
			{
				case '-':
					f_left = true;
					format++;
					break;
				case ' ':
					f_space = true;
					format++;
					break;
				case '0':
					f_zero = true;
					format++;
					break;
				default:
					more_flags = false;
					break;
			}
		}


		/* Parse field width. */
		if ((c = *format) >= '0' && c <= '9')
		{
			width = 0;
			while ((c = *format++) >= '0' && c <= '9')
			{
				width *= 10;
				width += c - '0';
			}
			format--;
		}
		else
			width = -1;


		/* Parse precision. */
		if (*format == '.')
		{
			if ((c = *++format) >= '0' && c <= '9')
			{
				precision = 0;
				while ((c = *format++) >= '0' && c <= '9')
				{
					precision *= 10;
					precision += c - '0';
				}
				format--;
			}
			else
				precision = -1;
		}
		else
			precision = -1;


		/* Parse format conversion. */
		switch (c = *format++)
		{
			case 'a':
				string = m_Album.isEmpty() ? 0 : const_cast<char *>(m_Album.latin1());
				goto Print_string;
			case 'c':
				string = m_Comment.isEmpty() ? 0 : const_cast<char *>(m_Comment.latin1());
				goto Print_string;
// 					case 'd':
// 						string = VS(date);
// 						goto Print_string;
			case 'e':
				tmp = m_File.extension(false);
				string = tmp.isEmpty() ? 0 : const_cast<char *>(tmp.latin1());
				goto Print_string;
			case 'f':
				tmp = m_File.fileName();
				string = tmp.isEmpty() ? 0 : const_cast<char *>(tmp.latin1());
				goto Print_string;
			case 'F':
				tmp = m_File.filePath();
				string = tmp.isEmpty() ? 0 : const_cast<char *>(tmp.latin1());
				goto Print_string;
// 					case 'g':
// 						string = VS(genre);
// 						goto Print_string;
			case 'n':
				bool ok;
				val = m_CdPosition.toInt(&ok);
				if (!ok)
					val = 0;
				goto Print_number;
			case 'b':
				val = m_Bitrate;
				goto Print_number;
			case 'p':
				string = m_Artist.isEmpty() ? 0 : const_cast<char *>(m_Artist.latin1());
				goto Print_string;
			case 't':
				string = m_Title.isEmpty() ? 0 : const_cast<char *>(m_Title.latin1());

		Print_string:
				if ( string == NULL )
					break;
				did_output = true;

				numpr = 0;
				if (width > 0)
				{
					/* Calculate printed size. */
					numpr = strlen(string);
					if (precision >= 0 && precision < numpr)
						numpr = precision;

					LEFTPAD(width - numpr);
				}

				/* Insert string. */
				if (precision >= 0)
				{
					while (precision-- > 0 &&
						   (c = *string++) != '\0')
						PUTCH(c);
				}
				else
				{
					while ((c = *string++) != '\0')
						PUTCH(c);
				}

				RIGHTPAD(width - numpr);
				break;

			case 'y':
				val = m_Year;

		Print_number:
				if ( val == 0 )
					break;
				if ( c != 'N' )
					did_output = true;

				/* Create reversed number string. */
				numdigits = 0;
				do
				{
					convert[numdigits++] = digits[val % 10];
					val /= 10;
				}
				while (val > 0);

				numpr = numdigits > precision ? numdigits : precision;

				/* Insert left padding. */
				if (!f_left && width > numpr)
				{
					if (f_zero)
						numpr = width;
					else
						for (i = width - numpr; i-- > 0;)
							PUTCH(' ');
				}

				/* Insert zero padding. */
				for (i = numpr - numdigits; i-- > 0;)
					PUTCH('0');

				/* Insert number. */
				while (numdigits > 0)
					PUTCH(convert[--numdigits]);

				RIGHTPAD(width - numpr);
				break;

			case '%':
				PUTCH('%');
				break;

			default:
				PUTCH('%');
				PUTCH(c);
				break;
		}
	}
	
 Done:
	*p = '\0';

	if (did_output)
		m_DisplayString = static_cast<const char *>(outbuf);
}


/*!
  Sets the display string to \a display.

  \sa displayString()
 */

void
QmSongItem::setDisplayString(
	const QString& display)
{
	m_DisplayString = display;
}


/*!
  \return The display string.
  \sa setDisplayString(const QString&)
 */

QString
QmSongItem::displayString() const
{
	return text(0);
}


/*!
  Sets the title of this song to \a title. This used instead of the filename if
  non-empty.
*/

void
QmSongItem::setSongTitle(
	const QString &title)
{
    m_Title = title;
}


/*!
  Creates and returns a songinfo object based on this song.

  \return The songinfo object. Will never be null.
  \warning The caller is responsible for deleting the returned object.
*/

QmSongInfo*
QmSongItem::info() const
{
	return QmSongInfo::create(m_File.filePath());
}


/*!
  \return True if this song is bad, false otherwise.
  \todo Cache flag?
*/

bool
QmSongItem::isBad() const
{
    return QmMarkManager::instance()->isBad(filePath());
}


/*!
  Saves the song to \a out as XML.
 */

void
QmSongItem::writeXml(
	QTextStream &out) const
{
    out << "<song>\n";
    out << "<path><![CDATA[" << m_File.filePath() << "]]></path>\n";
    if ( ! m_CdPosition.isEmpty()) 
        out << "<cd-position>" << m_CdPosition << "</cd-position>\n";
    if (m_LengthSeconds != 0) 
        out << "<length>" << m_LengthSeconds << "</length>\n";
    if ( ! m_Artist.isEmpty())
        out << "<artist><![CDATA[" << m_Artist << "]]></artist>\n";
    if ( ! m_Title.isEmpty())
        out << "<title><![CDATA[" << m_Title << "]]></title>\n";
    if ( ! m_Album.isEmpty()) 
        out << "<album><![CDATA[" << m_Album << "]]></album>\n";
    if (m_Bitrate > 0)
        out << "<bitrate>" << m_Bitrate << "</bitrate>\n";
    if (m_VariableBitrate)
        out << "<vbr>true</vbr>\n";
	if (m_MultiArtistAlbum)
		out << "<multi-artist>true</multi-artist>\n";
	if ( ! m_Comment.isEmpty())
		out << "<comment>" << m_Comment << "</comment>\n";
	if ( ! m_DisplayString.isEmpty())
		out << "<display-string><![CDATA[" << m_DisplayString << "]]></display-string>\n";
	if (m_Year > 0)
		out << "<year>" << m_Year << "</year>\n";
    out << "</song>\n"; 
}