asfparser/AsfHeaderParser.h

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#ifndef ASF_HEADER_PARSER_H_
#define ASF_HEADER_PARSER_H_

#include "AsfParserDefs.h"
#include "AsfObjects.h"
#include "AsfGuids.h"

class AsfHeaderParser {
public:
    AsfHeaderParser(void);
    ~AsfHeaderParser(void);

public:
    // buffer must contain a complete header object
    int parse(uint8_t* buffer, uint32_t size);

    AsfAudioStreamInfo* getAudioInfo() const;
    AsfVideoStreamInfo* getVideoInfo() const;
    AsfFileMediaInfo* getFileInfo() const;
    // return duration in 100-nanosecond unit , readable when header object is parsed
    uint64_t getDuration();
    // return data packet size, readable when header object is parsed
    uint32_t getDataPacketSize();
    // return preroll in milliseconds
    uint32_t getPreroll();
    // return Time Offset in any stream properties in 100-nanosecond unit
    // Time Offset must be equal for all the stream properties object
    uint64_t getTimeOffset();
    bool hasVideo();
    bool hasAudio();
    bool isSeekable();

private:
    int onFilePropertiesObject(uint8_t *buffer, uint32_t size);
    int onStreamPropertiesObject(uint8_t *buffer, uint32_t size);
    int onVideoSpecificData(AsfStreamPropertiesObject *obj, uint8_t *data);
    int onAudioSpecificData(AsfStreamPropertiesObject *obj, uint8_t *data);
    int onExtendedStreamPropertiesObject(uint8_t *buffer, uint32_t size);
    int parseHeaderExtensionObject(uint8_t *buffer, uint32_t size);
    void resetStreamInfo();

private:
    AsfAudioStreamInfo *mAudioInfo;
    AsfVideoStreamInfo *mVideoInfo;
    AsfFileMediaInfo  *mFileInfo;
    uint32_t mNumObjectParsed;
    uint32_t mNumberofHeaderObjects;
};

#endif