PeerStreamer

#define AVIO_SEEKABLE_NORMAL 0x0001 /**< Seeking works like for a local file */

/**

 * Bytestream IO Context.

 * New fields can be added to the end with minor version bumps.

 * Removal, reordering and changes to existing fields require a major

 * version bump.

 * sizeof(AVIOContext) must not be used outside libav*.

 */

typedef struct {

    unsigned char *buffer;

    int buffer_size;

    unsigned char *buf_ptr, *buf_end;

    void *opaque;

    int (*read_packet)(void *opaque, uint8_t *buf, int buf_size);

    int (*write_packet)(void *opaque, uint8_t *buf, int buf_size);

    int64_t (*seek)(void *opaque, int64_t offset, int whence);

    int64_t pos; /**< position in the file of the current buffer */

    int must_flush; /**< true if the next seek should flush */

    int eof_reached; /**< true if eof reached */

    int write_flag;  /**< true if open for writing */

#if FF_API_OLD_AVIO

    attribute_deprecated int is_streamed;

#endif

    int max_packet_size;

    unsigned long checksum;

    unsigned char *checksum_ptr;

    unsigned long (*update_checksum)(unsigned long checksum, const uint8_t *buf, unsigned int size);

    int error;         ///< contains the error code or 0 if no error happened

    int (*read_pause)(void *opaque, int pause);

    int64_t (*read_seek)(void *opaque, int stream_index,

                         int64_t timestamp, int flags);

    /**

     * A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.

     */

    int seekable;

} AVIOContext;