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use glib::translate::{from_glib, FromGlibPtrFull}; use std::fmt; use std::marker::PhantomData; use std::mem; use gst::MiniObject; use gst_rtp_sys; pub enum Readable {} pub enum Writable {} pub struct RTPBuffer<'a, T> { rtp_buffer: gst_rtp_sys::GstRTPBuffer, buffer: &'a gst::Buffer, phantom: PhantomData<T>, } unsafe impl<'a, T> Send for RTPBuffer<'a, T> {} unsafe impl<'a, T> Sync for RTPBuffer<'a, T> {} impl<'a, T> fmt::Debug for RTPBuffer<'a, T> { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { f.debug_struct("RTPBuffer") .field("rtp_buffer", &self.rtp_buffer) .field("buffer", &self.buffer) .field("phantom", &self.phantom) .finish() } } impl<'a> RTPBuffer<'a, Readable> { pub fn from_buffer_readable( buffer: &gst::Buffer, ) -> Result<RTPBuffer<Readable>, glib::BoolError> { unsafe { let mut rtp_buffer = mem::MaybeUninit::zeroed(); let res: bool = from_glib(gst_rtp_sys::gst_rtp_buffer_map( buffer.as_mut_ptr(), gst_sys::GST_MAP_READ, rtp_buffer.as_mut_ptr(), )); if res { Ok(RTPBuffer { rtp_buffer: rtp_buffer.assume_init(), buffer, phantom: PhantomData, }) } else { Err(glib_bool_error!("Failed to map RTP buffer readable")) } } } } impl<'a> RTPBuffer<'a, Writable> { pub fn from_buffer_writable( buffer: &mut gst::Buffer, ) -> Result<RTPBuffer<Writable>, glib::BoolError> { unsafe { let mut rtp_buffer = mem::MaybeUninit::zeroed(); let res: bool = from_glib(gst_rtp_sys::gst_rtp_buffer_map( buffer.as_mut_ptr(), gst_sys::GST_MAP_READWRITE, rtp_buffer.as_mut_ptr(), )); if res { Ok(RTPBuffer { rtp_buffer: rtp_buffer.assume_init(), buffer, phantom: PhantomData, }) } else { Err(glib_bool_error!("Failed to map RTP buffer writable")) } } } pub fn set_seq(&mut self, seq: u16) { unsafe { gst_rtp_sys::gst_rtp_buffer_set_seq(&mut self.rtp_buffer, seq); } } pub fn set_payload_type(&mut self, pt: u8) { unsafe { gst_rtp_sys::gst_rtp_buffer_set_payload_type(&mut self.rtp_buffer, pt); } } pub fn set_timestamp(&mut self, rtptime: u32) { unsafe { gst_rtp_sys::gst_rtp_buffer_set_timestamp(&mut self.rtp_buffer, rtptime); } } } impl<'a, T> RTPBuffer<'a, T> { pub fn get_seq(&mut self) -> u16 { unsafe { gst_rtp_sys::gst_rtp_buffer_get_seq(&mut self.rtp_buffer) } } pub fn get_payload_type(&mut self) -> u8 { unsafe { gst_rtp_sys::gst_rtp_buffer_get_payload_type(&mut self.rtp_buffer) } } pub fn get_timestamp(&mut self) -> u32 { unsafe { gst_rtp_sys::gst_rtp_buffer_get_timestamp(&mut self.rtp_buffer) } } } impl<'a, T> Drop for RTPBuffer<'a, T> { fn drop(&mut self) { unsafe { gst_rtp_sys::gst_rtp_buffer_unmap(&mut self.rtp_buffer); } } } pub trait RTPBufferExt { fn new_rtp_with_sizes( payload_len: u32, pad_len: u8, csrc_count: u8, ) -> Result<gst::Buffer, glib::BoolError>; } impl RTPBufferExt for gst::Buffer { fn new_rtp_with_sizes( payload_len: u32, pad_len: u8, csrc_count: u8, ) -> Result<gst::Buffer, glib::BoolError> { unsafe { Option::<_>::from_glib_full(gst_rtp_sys::gst_rtp_buffer_new_allocate( payload_len, pad_len, csrc_count, )) .ok_or_else(|| glib_bool_error!("Failed to allocate new RTP buffer")) } } } pub fn compare_seqnum(seqnum1: u16, seqnum2: u16) -> i32 { unsafe { gst_rtp_sys::gst_rtp_buffer_compare_seqnum(seqnum1, seqnum2) } } #[cfg(test)] mod tests { use super::*; #[test] fn test_map() { gst::init().unwrap(); let mut buffer = gst::Buffer::new_rtp_with_sizes(16, 4, 0).unwrap(); let mut rtp_buffer = RTPBuffer::from_buffer_writable(&mut buffer).unwrap(); rtp_buffer.set_seq(42); assert_eq!(rtp_buffer.get_seq(), 42); rtp_buffer.set_payload_type(43); assert_eq!(rtp_buffer.get_payload_type(), 43); rtp_buffer.set_timestamp(44); assert_eq!(rtp_buffer.get_timestamp(), 44); } }