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<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:str="http://exslt.org/strings"
xmlns:map="mapping"
exclude-result-prefixes="str map">
<!-- Mapping from Youtube fmt parameter (key) to webvideo priority
score (value) -->
<map:associativearray>
<map:item key="17" value="40"/> <!-- 176x144 3GP -->
<map:item key="5" value="50"/> <!-- 320x240 FLV -->
<map:item key="34" value="52"/> <!-- 640x360 FLV -->
<map:item key="35" value="54"/> <!-- 854x480 FLV -->
<map:item key="18" value="60"/> <!-- 640x360 MP4 -->
<map:item key="43" value="65"/> <!-- 640x360 WebM -->
<map:item key="44" value="67"/> <!-- 854x480 WebM -->
<map:item key="22" value="70"/> <!-- 720p MP4 -->
<map:item key="45" value="75"/> <!-- 720p WebM -->
<map:item key="37" value="80"/> <!-- 1080p MP4 -->
</map:associativearray>
<xsl:template name="fmturl">
<xsl:variable name="fmt">
<xsl:for-each select="str:tokenize(., '&')">
<xsl:if test="starts-with(., 'itag=')">
<xsl:value-of select="substring-after(., 'itag=')"/>
</xsl:if>
</xsl:for-each>
</xsl:variable>
<xsl:variable name="url">
<xsl:for-each select="str:tokenize(., '&')">
<xsl:if test="starts-with(., 'url=')">
<xsl:value-of select="str:decode-uri(substring-after(., 'url='))"/>
</xsl:if>
</xsl:for-each>
</xsl:variable>
<xsl:variable name="signature">
<xsl:for-each select="str:tokenize(., '&')">
<xsl:if test="starts-with(., 'sig=')">
<xsl:value-of select="str:decode-uri(substring-after(., 'sig='))"/>
</xsl:if>
</xsl:for-each>
</xsl:variable>
<xsl:if test="$url">
<url>
<xsl:attribute name="priority">
<xsl:choose>
<xsl:when test="document('')/*/map:associativearray/map:item[@key=$fmt]">
<xsl:value-of select="document('')/*/map:associativearray/map:item[@key=$fmt]/@value"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="50"/>
</xsl:otherwise>
</xsl:choose>
</xsl:attribute>
<xsl:value-of select="concat($url, '&signature=', $signature)"/>
</url>
</xsl:if>
</xsl:template>
<xsl:template name="mediaurl">
<xsl:param name="videoinfo"/>
<mediaurl>
<title>
<xsl:variable name="titleparam">
<xsl:choose>
<xsl:when test="contains(substring-after($videoinfo, '&title='), '&')">
<xsl:value-of select="substring-before(substring-after($videoinfo, '&title='), '&')"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="substring-after($videoinfo, '&title=')"/>
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<xsl:value-of select="str:decode-uri(str:replace($titleparam, '+', ' '))"/>
</title>
<xsl:for-each select="str:split(str:decode-uri(substring-before(substring-after($videoinfo, '&url_encoded_fmt_stream_map='), '&')), ',')">
<xsl:call-template name="fmturl"/>
</xsl:for-each>
</mediaurl>
</xsl:template>
<xsl:template name="main">
<xsl:call-template name="mediaurl">
<xsl:with-param name="videoinfo" select="."/>
</xsl:call-template>
</xsl:template>
<xsl:template match="/">
<xsl:call-template name="main"/>
</xsl:template>
</xsl:stylesheet>
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