<?xml version="1.0" encoding="utf-8"?>
<xs:schema targetNamespace="http://schemas.flvmeta.org/FLV/1.0/"
    elementFormDefault="qualified"
    xmlns="http://schemas.flvmeta.org/FLV/1.0/"
    xmlns:amf="http://schemas.flvmeta.org/AMF0/1.0/"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
>
  <xs:import namespace="http://schemas.flvmeta.org/AMF0/1.0/" schemaLocation="Amf0.xsd"/>

  <xs:element name="flv">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="tag" type="tFlvTag" minOccurs="0" maxOccurs="unbounded"/>
      </xs:sequence>
      <xs:attribute name="version" use="optional" fixed="1" />
      <xs:attribute name="hasVideo" use="optional" type="xs:boolean" default="1"/>
      <xs:attribute name="hasAudio" use="optional" type="xs:boolean" default="1"/>
    </xs:complexType>
  </xs:element>

  <xs:complexType name="tFlvTag">
    <xs:choice>
      <xs:element name="videoData" type="tVideoData"/>
      <xs:element name="audioData" type="tAudioData"/>
      <xs:element name="scriptDataObject" type="tScriptDataObject"/>
    </xs:choice>
    <xs:attribute name="type" type="tTagType" use="required"/>
    <xs:attribute name="dataSize" type="xs:nonNegativeInteger" use="optional"/>
    <xs:attribute name="timestamp" type="xs:nonNegativeInteger" use="required"/>
    <xs:attribute name="streamID" type="xs:nonNegativeInteger" use="optional" fixed="0"/>
    <xs:attribute name="offset" type="xs:nonNegativeInteger" use="required"/>
  </xs:complexType>

  <xs:simpleType name="tTagType">
    <xs:restriction base="xs:string">
      <xs:enumeration value="audio"/>
      <xs:enumeration value="video"/>
      <xs:enumeration value="scriptData"/>
    </xs:restriction>
  </xs:simpleType>
  
  <xs:complexType name="tAudioData">
    <xs:attribute name="format" use="required" type="tAudioFormat"/>
    <xs:attribute name="rate" use="required" type="tAudioRate"/>
    <xs:attribute name="size" use="required" type="tAudioSize"/>
    <xs:attribute name="type" use="required" type="tAudioType"/>
  </xs:complexType>

  <xs:simpleType name="tAudioFormat">
    <xs:restriction base="xs:string">
      <xs:enumeration value="Linear PCM, platform endian"/>
      <xs:enumeration value="ADPCM"/>
      <xs:enumeration value="MP3"/>
      <xs:enumeration value="Linear PCM, little endian"/>
      <xs:enumeration value="Nellymoser 16-kHz mono"/>
      <xs:enumeration value="Nellymoser 8-kHz mono"/>
      <xs:enumeration value="Nellymoser"/>
      <xs:enumeration value="G.711 A-law logarithmic PCM"/>
      <xs:enumeration value="G.711 mu-law logarithmic PCM"/>
      <xs:enumeration value="reserved"/>
      <xs:enumeration value="AAC"/>
      <xs:enumeration value="Speex"/>
      <xs:enumeration value="MP3 8-Khz"/>
      <xs:enumeration value="Device-specific sound"/>
    </xs:restriction>
  </xs:simpleType>

  <xs:simpleType name="tAudioRate">
    <xs:restriction base="xs:float">
      <xs:enumeration value="5.5"/>
      <xs:enumeration value="11"/>
      <xs:enumeration value="22"/>
      <xs:enumeration value="44"/>
    </xs:restriction>
  </xs:simpleType>

  <xs:simpleType name="tAudioSize">
    <xs:restriction base="xs:integer">
      <xs:enumeration value="8"/>
      <xs:enumeration value="16"/>
    </xs:restriction>
  </xs:simpleType>

  <xs:simpleType name="tAudioType">
    <xs:restriction base="xs:string">
      <xs:enumeration value="mono"/>
      <xs:enumeration value="stereo"/>
    </xs:restriction>
  </xs:simpleType>

  <xs:complexType name="tVideoData">
    <xs:attribute name="frameType" use="required" type="tFrameType"/>
    <xs:attribute name="codecID" use="required" type="tVideoCodec"/>
  </xs:complexType>

  <xs:simpleType name="tFrameType">
    <xs:restriction base="xs:string">
      <xs:enumeration value="keyframe"/>
      <xs:enumeration value="inter frame"/>
      <xs:enumeration value="disposable inter frame"/>
      <xs:enumeration value="generated keyframe"/>
      <xs:enumeration value="video info/command frame"/>
    </xs:restriction>
  </xs:simpleType>

  <xs:simpleType name="tVideoCodec">
    <xs:restriction base="xs:string">
      <xs:enumeration value="JPEG"/>
      <xs:enumeration value="Sorenson H.263"/>
      <xs:enumeration value="Screen video"/>
      <xs:enumeration value="On2 VP6"/>
      <xs:enumeration value="On2 VP6 with alpha channel"/>
      <xs:enumeration value="Screen video version 2"/>
      <xs:enumeration value="AVC"/>
    </xs:restriction>
  </xs:simpleType>

  <xs:complexType name="tScriptDataObject">
    <xs:group ref="amf:tData" />
    <xs:attribute name="name" use="required" type="xs:string" />
  </xs:complexType>

</xs:schema>