// This file was generated by gir (https://github.com/gtk-rs/gir)
// from gir-files (https://github.com/gtk-rs/gir-files)
// DO NOT EDIT

use glib;
use glib::translate::*;
use glib::ObjectExt;
use gst;
use gst_base_sys;
use std::mem;

glib_wrapper! {
    /// This class is for elements that receive buffers in an undesired size.
    /// While for example raw video contains one image per buffer, the same is not
    /// true for a lot of other formats, especially those that come directly from
    /// a file. So if you have undefined buffer sizes and require a specific size,
    /// this object is for you.
    ///
    /// An adapter is created with `Adapter::new`. It can be freed again with
    /// `gobject::ObjectExt::unref`.
    ///
    /// The theory of operation is like this: All buffers received are put
    /// into the adapter using `Adapter::push` and the data is then read back
    /// in chunks of the desired size using `Adapter::map`/`Adapter::unmap`
    /// and/or `Adapter::copy`. After the data has been processed, it is freed
    /// using `Adapter::unmap`.
    ///
    /// Other methods such as `Adapter::take` and `Adapter::take_buffer`
    /// combine `Adapter::map` and `Adapter::unmap` in one method and are
    /// potentially more convenient for some use cases.
    ///
    /// For example, a sink pad's chain function that needs to pass data to a library
    /// in 512-byte chunks could be implemented like this:
    ///
    /// ```C
    /// static GstFlowReturn
    /// sink_pad_chain (GstPad *pad, GstObject *parent, GstBuffer *buffer)
    /// {
    ///   MyElement *this;
    ///   GstAdapter *adapter;
    ///   GstFlowReturn ret = GST_FLOW_OK;
    ///
    ///   this = MY_ELEMENT (parent);
    ///
    ///   adapter = this->adapter;
    ///
    ///   // put buffer into adapter
    ///   gst_adapter_push (adapter, buffer);
    ///
    ///   // while we can read out 512 bytes, process them
    ///   while (gst_adapter_available (adapter) >= 512 && ret == GST_FLOW_OK) {
    ///     const guint8 *data = gst_adapter_map (adapter, 512);
    ///     // use flowreturn as an error value
    ///     ret = my_library_foo (data);
    ///     gst_adapter_unmap (adapter);
    ///     gst_adapter_flush (adapter, 512);
    ///   }
    ///   return ret;
    /// }
    /// ```
    ///
    /// For another example, a simple element inside GStreamer that uses `Adapter`
    /// is the libvisual element.
    ///
    /// An element using `Adapter` in its sink pad chain function should ensure that
    /// when the FLUSH_STOP event is received, that any queued data is cleared using
    /// `Adapter::clear`. Data should also be cleared or processed on EOS and
    /// when changing state from `gst::State::Paused` to `gst::State::Ready`.
    ///
    /// Also check the GST_BUFFER_FLAG_DISCONT flag on the buffer. Some elements might
    /// need to clear the adapter after a discontinuity.
    ///
    /// The adapter will keep track of the timestamps of the buffers
    /// that were pushed. The last seen timestamp before the current position
    /// can be queried with `Adapter::prev_pts`. This function can
    /// optionally return the number of bytes between the start of the buffer that
    /// carried the timestamp and the current adapter position. The distance is
    /// useful when dealing with, for example, raw audio samples because it allows
    /// you to calculate the timestamp of the current adapter position by using the
    /// last seen timestamp and the amount of bytes since. Additionally, the
    /// `Adapter::prev_pts_at_offset` can be used to determine the last
    /// seen timestamp at a particular offset in the adapter.
    ///
    /// The adapter will also keep track of the offset of the buffers
    /// (`GST_BUFFER_OFFSET`) that were pushed. The last seen offset before the
    /// current position can be queried with `Adapter::prev_offset`. This function
    /// can optionally return the number of bytes between the start of the buffer
    /// that carried the offset and the current adapter position.
    ///
    /// Additionally the adapter also keeps track of the PTS, DTS and buffer offset
    /// at the last discontinuity, which can be retrieved with
    /// `Adapter::pts_at_discont`, `Adapter::dts_at_discont` and
    /// `Adapter::offset_at_discont`. The number of bytes that were consumed
    /// since then can be queried with `Adapter::distance_from_discont`.
    ///
    /// A last thing to note is that while `Adapter` is pretty optimized,
    /// merging buffers still might be an operation that requires a `malloc` and
    /// `memcpy` operation, and these operations are not the fastest. Because of
    /// this, some functions like `Adapter::available_fast` are provided to help
    /// speed up such cases should you want to. To avoid repeated memory allocations,
    /// `Adapter::copy` can be used to copy data into a (statically allocated)
    /// user provided buffer.
    ///
    /// `Adapter` is not MT safe. All operations on an adapter must be serialized by
    /// the caller. This is not normally a problem, however, as the normal use case
    /// of `Adapter` is inside one pad's chain function, in which case access is
    /// serialized via the pad's STREAM_LOCK.
    ///
    /// Note that `Adapter::push` takes ownership of the buffer passed. Use
    /// `gst_buffer_ref` before pushing it into the adapter if you still want to
    /// access the buffer later. The adapter will never modify the data in the
    /// buffer pushed in it.
    ///
    /// # Implements
    ///
    /// [`glib::object::ObjectExt`](../glib/object/trait.ObjectExt.html)
    pub struct Adapter(Object<gst_base_sys::GstAdapter, gst_base_sys::GstAdapterClass, AdapterClass>);

    match fn {
        get_type => || gst_base_sys::gst_adapter_get_type(),
    }
}

impl Adapter {
    /// Creates a new `Adapter`. Free with `gobject::ObjectExt::unref`.
    ///
    /// # Returns
    ///
    /// a new `Adapter`
    pub fn new() -> Adapter {
        assert_initialized_main_thread!();
        unsafe { from_glib_full(gst_base_sys::gst_adapter_new()) }
    }

    /// Gets the maximum amount of bytes available, that is it returns the maximum
    /// value that can be supplied to `Adapter::map` without that function
    /// returning `None`.
    ///
    /// # Returns
    ///
    /// number of bytes available in `self`
    pub fn available(&self) -> usize {
        unsafe { gst_base_sys::gst_adapter_available(self.to_glib_none().0) }
    }

    /// Gets the maximum number of bytes that are immediately available without
    /// requiring any expensive operations (like copying the data into a
    /// temporary buffer).
    ///
    /// # Returns
    ///
    /// number of bytes that are available in `self` without expensive
    /// operations
    pub fn available_fast(&self) -> usize {
        unsafe { gst_base_sys::gst_adapter_available_fast(self.to_glib_none().0) }
    }

    /// Removes all buffers from `self`.
    pub fn clear(&self) {
        unsafe {
            gst_base_sys::gst_adapter_clear(self.to_glib_none().0);
        }
    }

    /// Similar to gst_adapter_copy, but more suitable for language bindings. `size`
    /// bytes of data starting at `offset` will be copied out of the buffers contained
    /// in `self` and into a new `glib::Bytes` structure which is returned. Depending on
    /// the value of the `size` argument an empty `glib::Bytes` structure may be returned.
    /// ## `offset`
    /// the bytes offset in the adapter to start from
    /// ## `size`
    /// the number of bytes to copy
    ///
    /// # Returns
    ///
    /// A new `glib::Bytes` structure containing the copied data.
    pub fn copy_bytes(&self, offset: usize, size: usize) -> Result<glib::Bytes, glib::BoolError> {
        unsafe {
            Option::<_>::from_glib_full(gst_base_sys::gst_adapter_copy_bytes(
                self.to_glib_none().0,
                offset,
                size,
            ))
            .ok_or_else(|| glib_bool_error!("Failed to copy bytes"))
        }
    }

    pub fn distance_from_discont(&self) -> u64 {
        unsafe { gst_base_sys::gst_adapter_distance_from_discont(self.to_glib_none().0) }
    }

    /// Get the DTS that was on the last buffer with the GST_BUFFER_FLAG_DISCONT
    /// flag, or GST_CLOCK_TIME_NONE.
    ///
    /// Feature: `v1_10`
    ///
    ///
    /// # Returns
    ///
    /// The DTS at the last discont or GST_CLOCK_TIME_NONE.
    #[cfg(any(feature = "v1_10", feature = "dox"))]
    pub fn dts_at_discont(&self) -> gst::ClockTime {
        unsafe {
            from_glib(gst_base_sys::gst_adapter_dts_at_discont(
                self.to_glib_none().0,
            ))
        }
    }

    /// Flushes the first `flush` bytes in the `self`. The caller must ensure that
    /// at least this many bytes are available.
    ///
    /// See also: `Adapter::map`, `Adapter::unmap`
    /// ## `flush`
    /// the number of bytes to flush
    pub fn flush(&self, flush: usize) {
        unsafe {
            gst_base_sys::gst_adapter_flush(self.to_glib_none().0, flush);
        }
    }

    /// Returns a `gst::Buffer` containing the first `nbytes` of the `self`, but
    /// does not flush them from the adapter. See `Adapter::take_buffer`
    /// for details.
    ///
    /// Caller owns a reference to the returned buffer. `gst_buffer_unref` after
    /// usage.
    ///
    /// Free-function: gst_buffer_unref
    /// ## `nbytes`
    /// the number of bytes to get
    ///
    /// # Returns
    ///
    /// a `gst::Buffer` containing the first
    ///  `nbytes` of the adapter, or `None` if `nbytes` bytes are not available.
    ///  `gst_buffer_unref` when no longer needed.
    pub fn get_buffer(&self, nbytes: usize) -> Result<gst::Buffer, glib::BoolError> {
        unsafe {
            Option::<_>::from_glib_full(gst_base_sys::gst_adapter_get_buffer(
                self.to_glib_none().0,
                nbytes,
            ))
            .ok_or_else(|| glib_bool_error!("Failed to get buffer"))
        }
    }

    /// Returns a `gst::Buffer` containing the first `nbytes` of the `self`, but
    /// does not flush them from the adapter. See `Adapter::take_buffer_fast`
    /// for details.
    ///
    /// Caller owns a reference to the returned buffer. `gst_buffer_unref` after
    /// usage.
    ///
    /// Free-function: gst_buffer_unref
    /// ## `nbytes`
    /// the number of bytes to get
    ///
    /// # Returns
    ///
    /// a `gst::Buffer` containing the first
    ///  `nbytes` of the adapter, or `None` if `nbytes` bytes are not available.
    ///  `gst_buffer_unref` when no longer needed.
    pub fn get_buffer_fast(&self, nbytes: usize) -> Result<gst::Buffer, glib::BoolError> {
        unsafe {
            Option::<_>::from_glib_full(gst_base_sys::gst_adapter_get_buffer_fast(
                self.to_glib_none().0,
                nbytes,
            ))
            .ok_or_else(|| glib_bool_error!("Failed to get buffer"))
        }
    }

    /// Returns a `gst::BufferList` of buffers containing the first `nbytes` bytes of
    /// the `self` but does not flush them from the adapter. See
    /// `Adapter::take_buffer_list` for details.
    ///
    /// Caller owns the returned list. Call `gst_buffer_list_unref` to free
    /// the list after usage.
    /// ## `nbytes`
    /// the number of bytes to get
    ///
    /// # Returns
    ///
    /// a `gst::BufferList` of buffers containing
    ///  the first `nbytes` of the adapter, or `None` if `nbytes` bytes are not
    ///  available
    pub fn get_buffer_list(&self, nbytes: usize) -> Result<gst::BufferList, glib::BoolError> {
        unsafe {
            Option::<_>::from_glib_full(gst_base_sys::gst_adapter_get_buffer_list(
                self.to_glib_none().0,
                nbytes,
            ))
            .ok_or_else(|| glib_bool_error!("Failed to get buffer list"))
        }
    }

    /// Returns a `glib::List` of buffers containing the first `nbytes` bytes of the
    /// `self`, but does not flush them from the adapter. See
    /// `Adapter::take_list` for details.
    ///
    /// Caller owns returned list and contained buffers. `gst_buffer_unref` each
    /// buffer in the list before freeing the list after usage.
    /// ## `nbytes`
    /// the number of bytes to get
    ///
    /// # Returns
    ///
    /// a `glib::List` of
    ///  buffers containing the first `nbytes` of the adapter, or `None` if `nbytes`
    ///  bytes are not available
    pub fn get_list(&self, nbytes: usize) -> Vec<gst::Buffer> {
        unsafe {
            FromGlibPtrContainer::from_glib_full(gst_base_sys::gst_adapter_get_list(
                self.to_glib_none().0,
                nbytes,
            ))
        }
    }

    /// 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.
    ///
    /// This function calls `Adapter::masked_scan_uint32_peek` passing `None`
    /// for value.
    /// ## `mask`
    /// mask to apply to data before matching against `pattern`
    /// ## `pattern`
    /// pattern to match (after mask is applied)
    /// ## `offset`
    /// offset into the adapter data from which to start scanning, returns
    ///  the last scanned position.
    /// ## `size`
    /// number of bytes to scan from offset
    ///
    /// # Returns
    ///
    /// offset of the first match, or -1 if no match was found.
    ///
    /// Example:
    ///
    /// ```text
    /// // 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
    /// ```
    pub fn masked_scan_uint32(&self, mask: u32, pattern: u32, offset: usize, size: usize) -> isize {
        unsafe {
            gst_base_sys::gst_adapter_masked_scan_uint32(
                self.to_glib_none().0,
                mask,
                pattern,
                offset,
                size,
            )
        }
    }

    /// Scan for pattern `pattern` with applied mask `mask` in the adapter data,
    /// starting from offset `offset`. If a match is found, the value that matched
    /// is returned through `value`, otherwise `value` is left untouched.
    ///
    /// 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.
    /// ## `mask`
    /// mask to apply to data before matching against `pattern`
    /// ## `pattern`
    /// pattern to match (after mask is applied)
    /// ## `offset`
    /// offset into the adapter data from which to start scanning, returns
    ///  the last scanned position.
    /// ## `size`
    /// number of bytes to scan from offset
    /// ## `value`
    /// pointer to uint32 to return matching data
    ///
    /// # Returns
    ///
    /// offset of the first match, or -1 if no match was found.
    pub fn masked_scan_uint32_peek(
        &self,
        mask: u32,
        pattern: u32,
        offset: usize,
        size: usize,
    ) -> (isize, u32) {
        unsafe {
            let mut value = mem::MaybeUninit::uninit();
            let ret = gst_base_sys::gst_adapter_masked_scan_uint32_peek(
                self.to_glib_none().0,
                mask,
                pattern,
                offset,
                size,
                value.as_mut_ptr(),
            );
            let value = value.assume_init();
            (ret, value)
        }
    }

    /// Get the offset that was on the last buffer with the GST_BUFFER_FLAG_DISCONT
    /// flag, or GST_BUFFER_OFFSET_NONE.
    ///
    /// Feature: `v1_10`
    ///
    ///
    /// # Returns
    ///
    /// The offset at the last discont or GST_BUFFER_OFFSET_NONE.
    #[cfg(any(feature = "v1_10", feature = "dox"))]
    pub fn offset_at_discont(&self) -> u64 {
        unsafe { gst_base_sys::gst_adapter_offset_at_discont(self.to_glib_none().0) }
    }

    /// Get the dts that was before the current byte in the adapter. When
    /// `distance` is given, the amount of bytes between the dts and the current
    /// position is returned.
    ///
    /// The dts is reset to GST_CLOCK_TIME_NONE and the distance is set to 0 when
    /// the adapter is first created or when it is cleared. This also means that before
    /// the first byte with a dts is removed from the adapter, the dts
    /// and distance returned are GST_CLOCK_TIME_NONE and 0 respectively.
    /// ## `distance`
    /// pointer to location for distance, or `None`
    ///
    /// # Returns
    ///
    /// The previously seen dts.
    pub fn prev_dts(&self) -> (gst::ClockTime, u64) {
        unsafe {
            let mut distance = mem::MaybeUninit::uninit();
            let ret = from_glib(gst_base_sys::gst_adapter_prev_dts(
                self.to_glib_none().0,
                distance.as_mut_ptr(),
            ));
            let distance = distance.assume_init();
            (ret, distance)
        }
    }

    /// Get the dts that was before the byte at offset `offset` in the adapter. When
    /// `distance` is given, the amount of bytes between the dts and the current
    /// position is returned.
    ///
    /// The dts is reset to GST_CLOCK_TIME_NONE and the distance is set to 0 when
    /// the adapter is first created or when it is cleared. This also means that before
    /// the first byte with a dts is removed from the adapter, the dts
    /// and distance returned are GST_CLOCK_TIME_NONE and 0 respectively.
    /// ## `offset`
    /// the offset in the adapter at which to get timestamp
    /// ## `distance`
    /// pointer to location for distance, or `None`
    ///
    /// # Returns
    ///
    /// The previously seen dts at given offset.
    pub fn prev_dts_at_offset(&self, offset: usize) -> (gst::ClockTime, u64) {
        unsafe {
            let mut distance = mem::MaybeUninit::uninit();
            let ret = from_glib(gst_base_sys::gst_adapter_prev_dts_at_offset(
                self.to_glib_none().0,
                offset,
                distance.as_mut_ptr(),
            ));
            let distance = distance.assume_init();
            (ret, distance)
        }
    }

    /// Get the offset that was before the current byte in the adapter. When
    /// `distance` is given, the amount of bytes between the offset and the current
    /// position is returned.
    ///
    /// The offset is reset to GST_BUFFER_OFFSET_NONE and the distance is set to 0
    /// when the adapter is first created or when it is cleared. This also means that
    /// before the first byte with an offset is removed from the adapter, the offset
    /// and distance returned are GST_BUFFER_OFFSET_NONE and 0 respectively.
    ///
    /// Feature: `v1_10`
    ///
    /// ## `distance`
    /// pointer to a location for distance, or `None`
    ///
    /// # Returns
    ///
    /// The previous seen offset.
    #[cfg(any(feature = "v1_10", feature = "dox"))]
    pub fn prev_offset(&self) -> (u64, u64) {
        unsafe {
            let mut distance = mem::MaybeUninit::uninit();
            let ret =
                gst_base_sys::gst_adapter_prev_offset(self.to_glib_none().0, distance.as_mut_ptr());
            let distance = distance.assume_init();
            (ret, distance)
        }
    }

    /// Get the pts that was before the current byte in the adapter. When
    /// `distance` is given, the amount of bytes between the pts and the current
    /// position is returned.
    ///
    /// The pts is reset to GST_CLOCK_TIME_NONE and the distance is set to 0 when
    /// the adapter is first created or when it is cleared. This also means that before
    /// the first byte with a pts is removed from the adapter, the pts
    /// and distance returned are GST_CLOCK_TIME_NONE and 0 respectively.
    /// ## `distance`
    /// pointer to location for distance, or `None`
    ///
    /// # Returns
    ///
    /// The previously seen pts.
    pub fn prev_pts(&self) -> (gst::ClockTime, u64) {
        unsafe {
            let mut distance = mem::MaybeUninit::uninit();
            let ret = from_glib(gst_base_sys::gst_adapter_prev_pts(
                self.to_glib_none().0,
                distance.as_mut_ptr(),
            ));
            let distance = distance.assume_init();
            (ret, distance)
        }
    }

    /// Get the pts that was before the byte at offset `offset` in the adapter. When
    /// `distance` is given, the amount of bytes between the pts and the current
    /// position is returned.
    ///
    /// The pts is reset to GST_CLOCK_TIME_NONE and the distance is set to 0 when
    /// the adapter is first created or when it is cleared. This also means that before
    /// the first byte with a pts is removed from the adapter, the pts
    /// and distance returned are GST_CLOCK_TIME_NONE and 0 respectively.
    /// ## `offset`
    /// the offset in the adapter at which to get timestamp
    /// ## `distance`
    /// pointer to location for distance, or `None`
    ///
    /// # Returns
    ///
    /// The previously seen pts at given offset.
    pub fn prev_pts_at_offset(&self, offset: usize) -> (gst::ClockTime, u64) {
        unsafe {
            let mut distance = mem::MaybeUninit::uninit();
            let ret = from_glib(gst_base_sys::gst_adapter_prev_pts_at_offset(
                self.to_glib_none().0,
                offset,
                distance.as_mut_ptr(),
            ));
            let distance = distance.assume_init();
            (ret, distance)
        }
    }

    /// Get the PTS that was on the last buffer with the GST_BUFFER_FLAG_DISCONT
    /// flag, or GST_CLOCK_TIME_NONE.
    ///
    /// Feature: `v1_10`
    ///
    ///
    /// # Returns
    ///
    /// The PTS at the last discont or GST_CLOCK_TIME_NONE.
    #[cfg(any(feature = "v1_10", feature = "dox"))]
    pub fn pts_at_discont(&self) -> gst::ClockTime {
        unsafe {
            from_glib(gst_base_sys::gst_adapter_pts_at_discont(
                self.to_glib_none().0,
            ))
        }
    }

    /// Returns a `gst::Buffer` containing the first `nbytes` bytes of the
    /// `self`. The returned bytes will be flushed from the adapter.
    /// This function is potentially more performant than
    /// `Adapter::take` since it can reuse the memory in pushed buffers
    /// by subbuffering or merging. This function will always return a
    /// buffer with a single memory region.
    ///
    /// Note that no assumptions should be made as to whether certain buffer
    /// flags such as the DISCONT flag are set on the returned buffer, or not.
    /// The caller needs to explicitly set or unset flags that should be set or
    /// unset.
    ///
    /// Since 1.6 this will also copy over all GstMeta of the input buffers except
    /// for meta with the `gst::MetaFlags::Pooled` flag or with the "memory" tag.
    ///
    /// Caller owns a reference to the returned buffer. `gst_buffer_unref` after
    /// usage.
    ///
    /// Free-function: gst_buffer_unref
    /// ## `nbytes`
    /// the number of bytes to take
    ///
    /// # Returns
    ///
    /// a `gst::Buffer` containing the first
    ///  `nbytes` of the adapter, or `None` if `nbytes` bytes are not available.
    ///  `gst_buffer_unref` when no longer needed.
    pub fn take_buffer(&self, nbytes: usize) -> Result<gst::Buffer, glib::BoolError> {
        unsafe {
            Option::<_>::from_glib_full(gst_base_sys::gst_adapter_take_buffer(
                self.to_glib_none().0,
                nbytes,
            ))
            .ok_or_else(|| glib_bool_error!("Failed to take buffer"))
        }
    }

    /// Returns a `gst::Buffer` containing the first `nbytes` of the `self`.
    /// The returned bytes will be flushed from the adapter. This function
    /// is potentially more performant than `Adapter::take_buffer` since
    /// it can reuse the memory in pushed buffers by subbuffering or
    /// merging. Unlike `Adapter::take_buffer`, the returned buffer may
    /// be composed of multiple non-contiguous `gst::Memory` objects, no
    /// copies are made.
    ///
    /// Note that no assumptions should be made as to whether certain buffer
    /// flags such as the DISCONT flag are set on the returned buffer, or not.
    /// The caller needs to explicitly set or unset flags that should be set or
    /// unset.
    ///
    /// This will also copy over all GstMeta of the input buffers except
    /// for meta with the `gst::MetaFlags::Pooled` flag or with the "memory" tag.
    ///
    /// This function can return buffer up to the return value of
    /// `Adapter::available` without making copies if possible.
    ///
    /// Caller owns a reference to the returned buffer. `gst_buffer_unref` after
    /// usage.
    ///
    /// Free-function: gst_buffer_unref
    /// ## `nbytes`
    /// the number of bytes to take
    ///
    /// # Returns
    ///
    /// a `gst::Buffer` containing the first
    ///  `nbytes` of the adapter, or `None` if `nbytes` bytes are not available.
    ///  `gst_buffer_unref` when no longer needed.
    pub fn take_buffer_fast(&self, nbytes: usize) -> Result<gst::Buffer, glib::BoolError> {
        unsafe {
            Option::<_>::from_glib_full(gst_base_sys::gst_adapter_take_buffer_fast(
                self.to_glib_none().0,
                nbytes,
            ))
            .ok_or_else(|| glib_bool_error!("Failed to take buffer"))
        }
    }

    /// Returns a `gst::BufferList` of buffers containing the first `nbytes` bytes of
    /// the `self`. The returned bytes will be flushed from the adapter.
    /// When the caller can deal with individual buffers, this function is more
    /// performant because no memory should be copied.
    ///
    /// Caller owns the returned list. Call `gst_buffer_list_unref` to free
    /// the list after usage.
    /// ## `nbytes`
    /// the number of bytes to take
    ///
    /// # Returns
    ///
    /// a `gst::BufferList` of buffers containing
    ///  the first `nbytes` of the adapter, or `None` if `nbytes` bytes are not
    ///  available
    pub fn take_buffer_list(&self, nbytes: usize) -> Result<gst::BufferList, glib::BoolError> {
        unsafe {
            Option::<_>::from_glib_full(gst_base_sys::gst_adapter_take_buffer_list(
                self.to_glib_none().0,
                nbytes,
            ))
            .ok_or_else(|| glib_bool_error!("Failed to take buffer list"))
        }
    }

    /// Returns a `glib::List` of buffers containing the first `nbytes` bytes of the
    /// `self`. The returned bytes will be flushed from the adapter.
    /// When the caller can deal with individual buffers, this function is more
    /// performant because no memory should be copied.
    ///
    /// Caller owns returned list and contained buffers. `gst_buffer_unref` each
    /// buffer in the list before freeing the list after usage.
    /// ## `nbytes`
    /// the number of bytes to take
    ///
    /// # Returns
    ///
    /// a `glib::List` of
    ///  buffers containing the first `nbytes` of the adapter, or `None` if `nbytes`
    ///  bytes are not available
    pub fn take_list(&self, nbytes: usize) -> Vec<gst::Buffer> {
        unsafe {
            FromGlibPtrContainer::from_glib_full(gst_base_sys::gst_adapter_take_list(
                self.to_glib_none().0,
                nbytes,
            ))
        }
    }
}

impl Default for Adapter {
    fn default() -> Self {
        Self::new()
    }
}

unsafe impl glib::SendUnique for Adapter {
    fn is_unique(&self) -> bool {
        self.ref_count() == 1
    }
}