ByteReader

#GstByteReader provides a byte reader that can read different integer and floating point types from a memory buffer. It provides functions for reading signed/unsigned, little/big endian integers of 8, 16, 24, 32 and 64 bits and functions for reading little/big endian floating points numbers of 32 and 64 bits. It also provides functions to read NUL-terminated strings in various character encodings.

class ByteReader {

GstByteReader cInstance;

bool dupStringUtf16(ushort[] str);

bool dupStringUtf32(uint[] str);

bool dupStringUtf8(string str);

bool getFloat32Be(float val);

bool getFloat32Le(float val);

bool getFloat64Be(double val);

bool getFloat64Le(double val);

bool getInt16Be(short val);

bool getInt16Le(short val);

bool getInt24Be(int val);

bool getInt24Le(int val);

bool getInt32Be(int val);

bool getInt32Le(int val);

bool getInt64Be(long val);

bool getInt64Le(long val);

bool getInt8(byte val);

uint getPos();

uint getRemaining();

uint getSize();

bool getStringUtf8(string str);

bool getUint16Be(ushort val);

bool getUint16Le(ushort val);

bool getUint24Be(uint val);

bool getUint24Le(uint val);

bool getUint32Be(uint val);

bool getUint32Le(uint val);

bool getUint64Be(ulong val);

bool getUint64Le(ulong val);

bool getUint8(ubyte val);

void init_(ubyte[] data);

uint maskedScanUint32(uint mask, uint pattern, uint offset, uint size);

uint maskedScanUint32Peek(uint mask, uint pattern, uint offset, uint size, uint value);

bool peekFloat32Be(float val);

bool peekFloat32Le(float val);

bool peekFloat64Be(double val);

bool peekFloat64Le(double val);

bool peekInt16Be(short val);

bool peekInt16Le(short val);

bool peekInt24Be(int val);

bool peekInt24Le(int val);

bool peekInt32Be(int val);

bool peekInt32Le(int val);

bool peekInt64Be(long val);

bool peekInt64Le(long val);

bool peekInt8(byte val);

bool peekStringUtf8(string str);

bool peekUint16Be(ushort val);

bool peekUint16Le(ushort val);

bool peekUint24Be(uint val);

bool peekUint24Le(uint val);

bool peekUint32Be(uint val);

bool peekUint32Le(uint val);

bool peekUint64Be(ulong val);

bool peekUint64Le(ulong val);

bool peekUint8(ubyte val);

bool setPos(uint pos);

bool skip(uint nbytes);

bool skipStringUtf16();

bool skipStringUtf32();

bool skipStringUtf8();

}

Members

Functions

dupStringUtf16 bool dupStringUtf16(ushort[] str): Free-function: g_free
dupStringUtf32 bool dupStringUtf32(uint[] str): Free-function: g_free
dupStringUtf8 bool dupStringUtf8(string str): Free-function: g_free
getFloat32Be bool getFloat32Be(float val): Read a 32 bit big endian floating point value into val and update the current position.
getFloat32Le bool getFloat32Le(float val): Read a 32 bit little endian floating point value into val and update the current position.
getFloat64Be bool getFloat64Be(double val): Read a 64 bit big endian floating point value into val and update the current position.
getFloat64Le bool getFloat64Le(double val): Read a 64 bit little endian floating point value into val and update the current position.
getInt16Be bool getInt16Be(short val): Read a signed 16 bit big endian integer into val and update the current position.
getInt16Le bool getInt16Le(short val): Read a signed 16 bit little endian integer into val and update the current position.
getInt24Be bool getInt24Be(int val): Read a signed 24 bit big endian integer into val and update the current position.
getInt24Le bool getInt24Le(int val): Read a signed 24 bit little endian integer into val and update the current position.
getInt32Be bool getInt32Be(int val): Read a signed 32 bit big endian integer into val and update the current position.
getInt32Le bool getInt32Le(int val): Read a signed 32 bit little endian integer into val and update the current position.
getInt64Be bool getInt64Be(long val): Read a signed 64 bit big endian integer into val and update the current position.
getInt64Le bool getInt64Le(long val): Read a signed 64 bit little endian integer into val and update the current position.
getInt8 bool getInt8(byte val): Read a signed 8 bit integer into val and update the current position.
getPos uint getPos(): Returns the current position of a #GstByteReader instance in bytes.
getRemaining uint getRemaining(): Returns the remaining number of bytes of a #GstByteReader instance.
getSize uint getSize(): Returns the total number of bytes of a #GstByteReader instance.
getStringUtf8 bool getStringUtf8(string str): Returns a constant pointer to the current data position if there is a NUL-terminated string in the data (this could be just a NUL terminator), advancing the current position to the byte after the string. This will work for any NUL-terminated string with a character width of 8 bits, so ASCII, UTF-8, ISO-8859-N etc.
getUint16Be bool getUint16Be(ushort val): Read an unsigned 16 bit big endian integer into val and update the current position.
getUint16Le bool getUint16Le(ushort val): Read an unsigned 16 bit little endian integer into val and update the current position.
getUint24Be bool getUint24Be(uint val): Read an unsigned 24 bit big endian integer into val and update the current position.
getUint24Le bool getUint24Le(uint val): Read an unsigned 24 bit little endian integer into val and update the current position.
getUint32Be bool getUint32Be(uint val): Read an unsigned 32 bit big endian integer into val and update the current position.
getUint32Le bool getUint32Le(uint val): Read an unsigned 32 bit little endian integer into val and update the current position.
getUint64Be bool getUint64Be(ulong val): Read an unsigned 64 bit big endian integer into val and update the current position.
getUint64Le bool getUint64Le(ulong val): Read an unsigned 64 bit little endian integer into val and update the current position.
getUint8 bool getUint8(ubyte val): Read an unsigned 8 bit integer into val and update the current position.
init_ void init_(ubyte[] data): Initializes a #GstByteReader instance to read from data. This function can be called on already initialized instances.
maskedScanUint32 uint maskedScanUint32(uint mask, uint pattern, uint offset, uint size): Scan for pattern pattern with applied mask mask in the byte reader data, starting from offset offset relative to the current position.
maskedScanUint32Peek uint maskedScanUint32Peek(uint mask, uint pattern, uint offset, uint size, uint value): Scan for pattern pattern with applied mask mask in the byte reader data, starting from offset offset relative to the current position.
peekFloat32Be bool peekFloat32Be(float val): Read a 32 bit big endian floating point value into val but keep the current position.
peekFloat32Le bool peekFloat32Le(float val): Read a 32 bit little endian floating point value into val but keep the current position.
peekFloat64Be bool peekFloat64Be(double val): Read a 64 bit big endian floating point value into val but keep the current position.
peekFloat64Le bool peekFloat64Le(double val): Read a 64 bit little endian floating point value into val but keep the current position.
peekInt16Be bool peekInt16Be(short val): Read a signed 16 bit big endian integer into val but keep the current position.
peekInt16Le bool peekInt16Le(short val): Read a signed 16 bit little endian integer into val but keep the current position.
peekInt24Be bool peekInt24Be(int val): Read a signed 24 bit big endian integer into val but keep the current position.
peekInt24Le bool peekInt24Le(int val): Read a signed 24 bit little endian integer into val but keep the current position.
peekInt32Be bool peekInt32Be(int val): Read a signed 32 bit big endian integer into val but keep the current position.
peekInt32Le bool peekInt32Le(int val): Read a signed 32 bit little endian integer into val but keep the current position.
peekInt64Be bool peekInt64Be(long val): Read a signed 64 bit big endian integer into val but keep the current position.
peekInt64Le bool peekInt64Le(long val): Read a signed 64 bit little endian integer into val but keep the current position.
peekInt8 bool peekInt8(byte val): Read a signed 8 bit integer into val but keep the current position.
peekStringUtf8 bool peekStringUtf8(string str): Returns a constant pointer to the current data position if there is a NUL-terminated string in the data (this could be just a NUL terminator). The current position will be maintained. This will work for any NUL-terminated string with a character width of 8 bits, so ASCII, UTF-8, ISO-8859-N etc.
peekUint16Be bool peekUint16Be(ushort val): Read an unsigned 16 bit big endian integer into val but keep the current position.
peekUint16Le bool peekUint16Le(ushort val): Read an unsigned 16 bit little endian integer into val but keep the current position.
peekUint24Be bool peekUint24Be(uint val): Read an unsigned 24 bit big endian integer into val but keep the current position.
peekUint24Le bool peekUint24Le(uint val): Read an unsigned 24 bit little endian integer into val but keep the current position.
peekUint32Be bool peekUint32Be(uint val): Read an unsigned 32 bit big endian integer into val but keep the current position.
peekUint32Le bool peekUint32Le(uint val): Read an unsigned 32 bit little endian integer into val but keep the current position.
peekUint64Be bool peekUint64Be(ulong val): Read an unsigned 64 bit big endian integer into val but keep the current position.
peekUint64Le bool peekUint64Le(ulong val): Read an unsigned 64 bit little endian integer into val but keep the current position.
peekUint8 bool peekUint8(ubyte val): Read an unsigned 8 bit integer into val but keep the current position.
setPos bool setPos(uint pos): Sets the new position of a #GstByteReader instance to pos in bytes.
skip bool skip(uint nbytes): Skips nbytes bytes of the #GstByteReader instance.
skipStringUtf16 bool skipStringUtf16(): Skips a NUL-terminated UTF-16 string in the #GstByteReader instance, advancing the current position to the byte after the string.
skipStringUtf32 bool skipStringUtf32(): Skips a NUL-terminated UTF-32 string in the #GstByteReader instance, advancing the current position to the byte after the string.
skipStringUtf8 bool skipStringUtf8(): Skips a NUL-terminated string in the #GstByteReader instance, advancing the current position to the byte after the string. This will work for any NUL-terminated string with a character width of 8 bits, so ASCII, UTF-8, ISO-8859-N etc. No input checking for valid UTF-8 is done.

gstbase byte_reader classes

ByteReader