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rtp_buffer: wrap more methods

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* extension data
* onebyte/twobytes extension
* ssrc
* csrc
* get_payload
This commit is contained in:
Thiago Sousa Santos 2020-06-06 07:03:29 +00:00 committed by Sebastian Dröge
parent 2c4de19067
commit 51024345f8
1 changed files with 331 additions and 8 deletions
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339
gstreamer-rtp/src/rtp_buffer.rs
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@ -1,7 +1,9 @@
use glib::translate::{from_glib, FromGlibPtrFull};
use glib::translate::{from_glib, from_glib_full, FromGlibPtrFull, ToGlib};
use std::fmt;
use std::marker::PhantomData;
use std::mem;
use std::ptr;
use std::slice;
use gst::MiniObject;
use gst_rtp_sys;
@ -89,24 +91,226 @@ impl<'a> RTPBuffer<'a, Writable> {
}
}
pub fn set_ssrc(&mut self, ssrc: u32) {
unsafe { gst_rtp_sys::gst_rtp_buffer_set_ssrc(&mut self.rtp_buffer, ssrc) }
}
pub fn set_csrc(&mut self, idx: u8, ssrc: u32) {
unsafe { gst_rtp_sys::gst_rtp_buffer_set_csrc(&mut self.rtp_buffer, idx, ssrc) }
}
pub fn set_timestamp(&mut self, rtptime: u32) {
unsafe {
gst_rtp_sys::gst_rtp_buffer_set_timestamp(&mut self.rtp_buffer, rtptime);
}
}
pub fn set_extension(&mut self, extension: bool) {
unsafe {
gst_rtp_sys::gst_rtp_buffer_set_extension(&mut self.rtp_buffer, extension.to_glib())
}
}
pub fn add_extension_onebyte_header(
&mut self,
id: u8,
data: &[u8],
) -> Result<(), glib::BoolError> {
assert!(
id >= 1 && id <= 14,
"id should be between 1 and 14 (inclusive)"
);
assert!(
!data.is_empty() && data.len() <= 16,
"data size should be between 1 and 16 (inclusive"
);
unsafe {
let result: bool = from_glib(gst_rtp_sys::gst_rtp_buffer_add_extension_onebyte_header(
&mut self.rtp_buffer,
id,
data.as_ptr() as glib_sys::gconstpointer,
data.len() as u32,
));
if result {
Ok(())
} else {
Err(glib_bool_error!("Failed to add onebyte header extension"))
}
}
}
pub fn add_extension_twobytes_header(
&mut self,
appbits: u8,
id: u8,
data: &[u8],
) -> Result<(), glib::BoolError> {
assert_eq!(
appbits & 0xF0,
0,
"appbits must use only 4 bits (max value is 15)"
);
assert!(data.len() < 256, "data size should be smaller than 256");
unsafe {
let result: bool =
from_glib(gst_rtp_sys::gst_rtp_buffer_add_extension_twobytes_header(
&mut self.rtp_buffer,
appbits,
id,
data.as_ptr() as glib_sys::gconstpointer,
data.len() as u32,
));
if result {
Ok(())
} else {
Err(glib_bool_error!("Failed to add twobytes header extension"))
}
}
}
}
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_seq(&self) -> u16 {
unsafe {
gst_rtp_sys::gst_rtp_buffer_get_seq(glib::translate::mut_override(&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_payload_type(&self) -> u8 {
unsafe {
gst_rtp_sys::gst_rtp_buffer_get_payload_type(glib::translate::mut_override(
&self.rtp_buffer,
))
}
}
pub fn get_timestamp(&mut self) -> u32 {
unsafe { gst_rtp_sys::gst_rtp_buffer_get_timestamp(&mut self.rtp_buffer) }
pub fn get_ssrc(&self) -> u32 {
unsafe {
gst_rtp_sys::gst_rtp_buffer_get_ssrc(glib::translate::mut_override(&self.rtp_buffer))
}
}
pub fn get_timestamp(&self) -> u32 {
unsafe {
gst_rtp_sys::gst_rtp_buffer_get_timestamp(glib::translate::mut_override(
&self.rtp_buffer,
))
}
}
pub fn get_csrc(&self, idx: u8) -> Option<u32> {
if idx < self.get_csrc_count() {
unsafe {
Some(gst_rtp_sys::gst_rtp_buffer_get_csrc(
glib::translate::mut_override(&self.rtp_buffer),
idx,
))
}
} else {
None
}
}
pub fn get_csrc_count(&self) -> u8 {
unsafe {
gst_rtp_sys::gst_rtp_buffer_get_csrc_count(glib::translate::mut_override(
&self.rtp_buffer,
))
}
}
pub fn get_payload_size(&self) -> u32 {
unsafe {
gst_rtp_sys::gst_rtp_buffer_get_payload_len(glib::translate::mut_override(
&self.rtp_buffer,
)) as u32
}
}
pub fn get_payload(&self) -> Result<&[u8], glib::error::BoolError> {
let size = self.get_payload_size();
if size == 0 {
return Ok(&[]);
}
unsafe {
let pointer = gst_rtp_sys::gst_rtp_buffer_get_payload(glib::translate::mut_override(
&self.rtp_buffer,
));
if pointer.is_null() {
Err(glib_bool_error!("Failed to get payload data"))
} else {
Ok(slice::from_raw_parts(pointer as *const u8, size as usize))
}
}
}
pub fn get_extension(&self) -> bool {
unsafe {
from_glib(gst_rtp_sys::gst_rtp_buffer_get_extension(
glib::translate::mut_override(&self.rtp_buffer),
))
}
}
pub fn get_extension_bytes(&self) -> Option<(u16, glib::Bytes)> {
unsafe {
let mut bits: u16 = 0;
match from_glib_full(gst_rtp_sys::gst_rtp_buffer_get_extension_bytes(
glib::translate::mut_override(&self.rtp_buffer),
&mut bits,
)) {
Some(bytes) => Some((bits, bytes)),
None => None,
}
}
}
pub fn get_extension_onebyte_header(&self, id: u8, nth: u32) -> Option<&[u8]> {
unsafe {
let mut data = ptr::null_mut();
// FIXME: Workaround for gstreamer-rtp-sys having the wrong type for this parameter
let data_ptr = &mut data as *mut *mut u8 as *mut u8;
let mut size: u32 = 0;
let result: bool = from_glib(gst_rtp_sys::gst_rtp_buffer_get_extension_onebyte_header(
glib::translate::mut_override(&self.rtp_buffer),
id,
nth,
data_ptr,
&mut size,
));
if result {
Some(slice::from_raw_parts(data as *const u8, size as usize))
} else {
None
}
}
}
pub fn get_extension_twobytes_header(&self, id: u8, nth: u32) -> Option<(u8, &[u8])> {
unsafe {
let mut data = ptr::null_mut();
// FIXME: Workaround for gstreamer-rtp-sys having the wrong type for this parameter
let data_ptr = &mut data as *mut *mut u8 as *mut u8;
let mut size: u32 = 0;
let mut appbits = 0;
let result: bool =
from_glib(gst_rtp_sys::gst_rtp_buffer_get_extension_twobytes_header(
glib::translate::mut_override(&self.rtp_buffer),
&mut appbits,
id,
nth,
data_ptr,
&mut size,
));
if result {
Some((
appbits,
slice::from_raw_parts(data as *const u8, size as usize),
))
} else {
None
}
}
}
}
@ -155,7 +359,9 @@ mod tests {
fn test_map() {
gst::init().unwrap();
let mut buffer = gst::Buffer::new_rtp_with_sizes(16, 4, 0).unwrap();
let csrc_count = 2;
let payload_size = 16;
let mut buffer = gst::Buffer::new_rtp_with_sizes(payload_size, 4, csrc_count).unwrap();
let mut rtp_buffer = RTPBuffer::from_buffer_writable(&mut buffer).unwrap();
rtp_buffer.set_seq(42);
@ -166,5 +372,122 @@ mod tests {
rtp_buffer.set_timestamp(44);
assert_eq!(rtp_buffer.get_timestamp(), 44);
rtp_buffer.set_ssrc(45);
assert_eq!(rtp_buffer.get_ssrc(), 45);
assert_eq!(rtp_buffer.get_payload_size(), payload_size);
let payload = rtp_buffer.get_payload();
assert!(payload.is_ok());
let payload = payload.unwrap();
assert_eq!(payload.len(), payload_size as usize);
assert_eq!(rtp_buffer.get_csrc_count(), csrc_count);
rtp_buffer.set_csrc(0, 12);
rtp_buffer.set_csrc(1, 15);
assert_eq!(rtp_buffer.get_csrc(0).unwrap(), 12);
assert_eq!(rtp_buffer.get_csrc(1).unwrap(), 15);
assert!(rtp_buffer.get_csrc(2).is_none());
rtp_buffer.set_extension(true);
assert_eq!(rtp_buffer.get_extension(), true);
assert_eq!(rtp_buffer.get_extension_bytes(), None);
}
#[test]
fn test_empty_payload() {
gst::init().unwrap();
let csrc_count = 0;
let payload_size = 0;
let buffer = gst::Buffer::new_rtp_with_sizes(payload_size, 4, csrc_count).unwrap();
let rtp_buffer = RTPBuffer::from_buffer_readable(&buffer).unwrap();
assert_eq!(rtp_buffer.get_payload_size(), payload_size);
let payload = rtp_buffer.get_payload();
assert!(payload.is_ok());
assert_eq!(payload.unwrap().len(), payload_size as usize);
}
#[test]
fn test_extension_header_onebyte() {
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();
assert_eq!(rtp_buffer.get_extension_bytes(), None);
let extension_data: [u8; 4] = [100, 101, 102, 103];
let result = rtp_buffer.add_extension_onebyte_header(1, &extension_data);
assert!(result.is_ok());
let bytes_option = rtp_buffer.get_extension_bytes();
assert!(bytes_option.is_some());
let (bits, bytes) = bytes_option.unwrap();
// 0xBEDE is the onebyte extension header marker: https://tools.ietf.org/html/rfc5285 (4.2)
assert_eq!(bits, 0xbede);
/*
* bytes is:
* * id (4 bits)
* * size-1 (4 bits)
* * data (with padded length to multiples of 4)
*/
assert_eq!(bytes[0] >> 4, 1);
assert_eq!(bytes[0] & 0xF, 3);
for i in 0..extension_data.len() {
assert_eq!(bytes[i + 1], extension_data[i]);
}
let result = rtp_buffer.get_extension_onebyte_header(2, 0);
assert!(result.is_none());
let result = rtp_buffer.get_extension_onebyte_header(1, 0);
assert!(result.is_some());
assert_eq!(result.unwrap(), &extension_data);
}
#[test]
fn test_extension_header_twobytes() {
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();
assert_eq!(rtp_buffer.get_extension_bytes(), None);
let extension_data: [u8; 4] = [100, 101, 102, 103];
let appbits = 5;
let id = 1;
let result = rtp_buffer.add_extension_twobytes_header(appbits, id, &extension_data);
assert!(result.is_ok());
let bytes_option = rtp_buffer.get_extension_bytes();
assert!(bytes_option.is_some());
let (bits, bytes) = bytes_option.unwrap();
// 0x100 + appbits is the twobyte extension header marker:
// https://tools.ietf.org/html/rfc5285 (4.3)
assert_eq!(bits, 0x1000 | appbits as u16);
/*
* bytes is:
* * id (1 byte)
* * size-2 (1 byte)
* * data (with padded length to multiples of 4)
*/
assert_eq!(bytes[0], id);
assert_eq!(bytes[1], extension_data.len() as u8);
for i in 0..extension_data.len() {
assert_eq!(bytes[i + 2], extension_data[i]);
}
let result = rtp_buffer.get_extension_twobytes_header(2, 0);
assert!(result.is_none());
let result = rtp_buffer.get_extension_twobytes_header(id, 0);
assert!(result.is_some());
let (extracted_appbits, data) = result.unwrap();
assert_eq!(appbits, extracted_appbits);
assert_eq!(data, &extension_data);
}
}