Create a new GstBase.Adapter

Parameters:

Object properties

Gets the maximum amount of bytes available, that is it returns the maximum value that can be supplied to gst_adapter_peek() without that function returning NULL.

Returns:

Number

Gets the maximum number of bytes that are immediately available without requiring any expensive operations (like copying the data into a temporary buffer). operations

Returns:

Number

Removes all buffers from adapter.

Returns:

none

Copies size bytes of data starting at offset out of the buffers contained in GstAdapter into an array dest provided by the caller. The array dest should be large enough to contain size bytes. The user should check that the adapter has (offset + size) bytes available before calling this function.

Parameters:

String dest Required (not null)

Number offset Required (not null)

Number size Required (not null)

Returns:

none

Flushes the first flush bytes in the adapter. The caller must ensure that at least this many bytes are available.

Parameters:

Number flush Required (not null)

Returns:

none

Scan for pattern pattern with applied mask mask in the adapter data, starting from offset offset. The bytes in pattern and mask are interpreted left-to-right, regardless of endianness. All four bytes of the pattern must be present in the adapter for it to match, even if the first or last bytes are masked out. It is an error to call this function without making sure that there is enough data (offset+size bytes) in the adapter. Example: // Assume the adapter contains 0x00 0x01 0x02 ... 0xfe 0xff gst_adapter_masked_scan_uint32 (adapter, 0xffffffff, 0x00010203, 0, 256); // -> returns 0 gst_adapter_masked_scan_uint32 (adapter, 0xffffffff, 0x00010203, 1, 255); // -> returns -1 gst_adapter_masked_scan_uint32 (adapter, 0xffffffff, 0x01020304, 1, 255); // -> returns 1 gst_adapter_masked_scan_uint32 (adapter, 0xffff, 0x0001, 0, 256); // -> returns -1 gst_adapter_masked_scan_uint32 (adapter, 0xffff, 0x0203, 0, 256); // -> returns 0 gst_adapter_masked_scan_uint32 (adapter, 0xffff0000, 0x02030000, 0, 256); // -> returns 2 gst_adapter_masked_scan_uint32 (adapter, 0xffff0000, 0x02030000, 0, 4); // -> returns -1

Parameters:

Number mask Required (not null)

Number pattern Required (not null)

Number offset Required (not null)

the last scanned position.

Number size Required (not null)

Returns:

Number

Gets the first size bytes stored in the adapter. The returned pointer is valid until the next function is called on the adapter. Note that setting the returned pointer as the data of a GstBuffer is incorrect for general-purpose plugins. The reason is that if a downstream element stores the buffer so that it has access to it outside of the bounds of its chain function, the buffer will have an invalid data pointer after your element flushes the bytes. In that case you should use gst_adapter_take(), which returns a freshly-allocated buffer that you can set as GstBuffer malloc_data or the potentially more performant gst_adapter_take_buffer(). Returns NULL if size bytes are not available.

Parameters:

Number size Required (not null)

Returns:

String

Get the timestamp that was before the current byte in the adapter. When position is returned. The timestamp is reset to GST_CLOCK_TIME_NONE when the adapter is first created or when it is cleared.

Parameters:

Object out_values

Number distance

Returns:

Number

Adds the data from buf to the data stored inside adapter and takes ownership of the buffer. Empty buffers will be automatically dereferenced and not stored in the

Parameters:

Gst.Buffer buf Required (not null)

Returns:

none

Returns a freshly allocated buffer containing the first nbytes bytes of the Caller owns returned value. g_free after usage.

Parameters:

Number nbytes Required (not null)

Returns:

String

Returns a GstBuffer containing the first nbytes bytes of the This function is potentially more performant than gst_adapter_take() since it can reuse the memory in pushed buffers by subbuffering or merging. Caller owns returned value. gst_buffer_unref() after usage. or NULL if nbytes bytes are not available

Parameters:

Number nbytes Required (not null)

Returns:

Gst.Buffer