127 lines
4.3 KiB
C++
127 lines
4.3 KiB
C++
// Classes to wrap XML operations. XmlNode is a generic wrapper class for
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// XmlNode in libxml2. There are also MPD XML specific classes as well.
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#ifndef MPD_BASE_XML_XML_NODE_H_
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#define MPD_BASE_XML_XML_NODE_H_
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#include <list>
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#include "base/basictypes.h"
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#include "mpd/base/content_protection_element.h"
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#include "mpd/base/media_info.pb.h"
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#include "mpd/base/xml/scoped_xml_ptr.h"
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#include "third_party/libxml/src/include/libxml/tree.h"
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namespace dash_packager {
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namespace xml {
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// These classes are wrapper classes for XML elements for generating MPD.
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// None of the pointer parameters should be NULL. None of the methods are meant
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// to be overridden.
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class XmlNode {
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public:
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// Makes an XML element with |name|. |name| should not be NULL.
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explicit XmlNode(const char* name);
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virtual ~XmlNode();
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// The ownership transfers to this object. On failure, this method will
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// destruct |child|.
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bool AddChild(ScopedXmlPtr<xmlNode>::type child);
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void SetStringAttribute(const char* attribute_name,
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const std::string& attribute);
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void SetNumberAttribute(const char* attribute_name, uint64 number);
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void SetId(uint32 id);
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// This is like 'innerHTML' setter.
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// This function does not work well with AddChild(). Use either AddChild() or
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// SetContent() when setting the content of this node.
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void SetContent(const std::string& content);
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// Ownership transfer. After calling this method, calling any methods of
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// this object, except the destructor, is undefined.
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ScopedXmlPtr<xmlNode>::type PassScopedPtr();
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// Release the xmlNodePtr of this object. After calling this method, calling
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// any methods of this object, except the destructor, is undefined.
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xmlNodePtr Release();
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// TODO(rkuroiwa): This isn't elegant. The only place this is used is when
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// getting the duration of the MPD. Maybe make MpdXmlNode that does stuff
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// internally, for example get 'duration' from all Representation nodes?
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xmlNodePtr GetRawPtr();
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private:
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ScopedXmlPtr<xmlNode>::type node_;
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DISALLOW_COPY_AND_ASSIGN(XmlNode);
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};
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// This corresponds to RepresentationBaseType in MPD. RepresentationBaseType is
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// not a concrete element type so this should not get instantiated on its own.
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// AdaptationSet and Representation are subtypes of this.
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class RepresentationBaseXmlNode : public XmlNode {
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public:
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virtual ~RepresentationBaseXmlNode();
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bool AddContentProtectionElements(
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const std::list<ContentProtectionElement>& content_protection_elements);
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protected:
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explicit RepresentationBaseXmlNode(const char* name);
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private:
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bool AddContentProtectionElement(
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const ContentProtectionElement& content_protection_element);
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DISALLOW_COPY_AND_ASSIGN(RepresentationBaseXmlNode);
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};
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// AdaptationSetType in MPD.
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class AdaptationSetXmlNode : public RepresentationBaseXmlNode {
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public:
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AdaptationSetXmlNode();
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virtual ~AdaptationSetXmlNode();
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private:
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DISALLOW_COPY_AND_ASSIGN(AdaptationSetXmlNode);
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};
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// RepresentationType in MPD.
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// TODO(rkuroiwa): Maybe provide methods to add mimetype, codecs, and bandwidth?
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class RepresentationXmlNode : public RepresentationBaseXmlNode {
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public:
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typedef ::google::protobuf::RepeatedPtrField<MediaInfo_VideoInfo>
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RepeatedVideoInfo;
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typedef ::google::protobuf::RepeatedPtrField<MediaInfo_AudioInfo>
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RepeatedAudioInfo;
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RepresentationXmlNode();
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virtual ~RepresentationXmlNode();
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// Returns true if successfully set attributes and children elements (if
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// applicable). repeated info of size 0 is valid input.
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bool AddVideoInfo(const RepeatedVideoInfo& repeated_video_info);
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bool AddAudioInfo(const RepeatedAudioInfo& repeated_audio_info);
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// Check MediaInfo protobuf definition for which fields are specific to VOD.
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bool AddVODOnlyInfo(const MediaInfo& media_info);
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// TODO(rkuroiwa): Add Live info.
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private:
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// Add AudioChannelConfiguration elements. This will add multiple
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// AudioChannelConfiguration if |repeated_audio_info| contains multiple
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// distinct channel configs (e.g. 2 channels and 6 channels adds 2 elements).
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bool AddAudioChannelInfo(const RepeatedAudioInfo& repeated_audio_info);
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// Add audioSamplingRate attribute to this element.
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void AddAudioSamplingRateInfo(const RepeatedAudioInfo& repeated_audio_info);
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DISALLOW_COPY_AND_ASSIGN(RepresentationXmlNode);
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};
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} // namespace xml
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} // namespace dash_packager
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#endif // MPD_BASE_XML_XML_NODE_H_
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