VorbisDecoder.h

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#pragma once
 
#include <vorbis/vorbisfile.h>
 
#include <string>
#include <vector>
 
#include <tdme/tdme.h>
#include <tdme/audio/decoder/fwd-tdme.h>
#include <tdme/audio/decoder/AudioDecoder.h>
#include <tdme/audio/decoder/AudioDecoderException.h>
#include <tdme/os/filesystem/fwd-tdme.h>
#include <tdme/os/filesystem/FileSystemException.h>
#include <tdme/utilities/fwd-tdme.h>
 
using std::string;
using std::vector;
 
using tdme::audio::decoder::AudioDecoder;
using tdme::audio::decoder::AudioDecoderException;
using tdme::os::filesystem::FileSystemException;
using tdme::utilities::ByteBuffer;
 
/**
 * OGG/Vorbis audio decoder
 * @author Andreas Drewke
 */
class tdme::audio::decoder::VorbisDecoder: public AudioDecoder
{
private:
    struct OGGFileData {
        vector<uint8_t> data;
        size_t position { 0 };
    };
 
public:
 
    /**
     * Open a local file
     * @param pathName path name
     * @param fileName file name
     * @throws tdme::os::filesystem::FileSystemException
     * @throws tdme::audio::decoder::AudioDecoderException
     */
    virtual void openFile(const string& pathName, const string& fileName);
 
    /**
     * Resets this audio decoder, if a stream was open it will be rewinded
     * @throws tdme::os::filesystem::FileSystemException
     * @throws tdme::audio::decoder::AudioDecoderException
     */
    virtual void reset();
 
    /**
     * Read raw PCM data from stream
     * @param data byte buffer
     * @throws tdme::os::filesystem::FileSystemException
     * @throws tdme::audio::decoder::AudioDecoderException
     * @return number of bytes read
     */
    virtual int32_t readFromStream(ByteBuffer* data);
 
    /**
     * Closes the audio file
     * @throws tdme::os::filesystem::FileSystemException
     * @throws tdme::audio::decoder::AudioDecoderException
     */
    virtual void close();
 
    /**
     * Constructor
     */
    VorbisDecoder();
 
    /**
     * Destructor
     */
    ~VorbisDecoder();
 
private:
    /**
     * Read from OGG file data
     * @param buffer buffer to read into
     * @param size chunk bytes to read
     * @param count chunk count to read
     * @param oggFileData pointer to OGG file data
     */
    static size_t oggfiledata_read(void* buffer, size_t size, size_t count, VorbisDecoder::OGGFileData* oggFileData);
 
    /**
     * Seek in OGG file data
     * @param oggFileData OGG file data pointer
     * @param offset offset (can be relative to position)
     * @param whence whence see (SEEK_*)
     */
    static int oggfiledata_seek(VorbisDecoder::OGGFileData* oggFileData, ogg_int64_t offset, int whence);
 
    /**
     * Close OGG file data
     * @param oggFileData pointer to OGG file data
     */
    static int oggfiledata_close(VorbisDecoder::OGGFileData* oggFileData);
 
    /**
     * Tell position of OGG file data
     * @param oggFileData pointer to OGG file data
     * @return current read position
     */
    static long oggfiledata_tell(VorbisDecoder::OGGFileData* oggFileData);
 
    OGGFileData* oggFileData { nullptr };
    string pathName;
    string fileName;
    OggVorbis_File vf;
    int section;
};