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|
pub use crate::frame::*;
pub use crate::io::byteio::*;
#[derive(Debug,Clone,Copy,PartialEq)]
#[allow(dead_code)]
pub enum DemuxerError {
EOF,
NoSuchInput,
InvalidData,
IOError,
NotImplemented,
MemoryError,
TryAgain,
}
pub type DemuxerResult<T> = Result<T, DemuxerError>;
pub trait DemuxCore<'a> {
fn open(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<()>;
fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket>;
fn seek(&mut self, time: u64) -> DemuxerResult<()>;
}
pub trait NAPacketReader {
fn read_packet(&mut self, str: NAStreamRef, ts: NATimeInfo, keyframe: bool, size: usize) -> DemuxerResult<NAPacket>;
fn fill_packet(&mut self, pkt: &mut NAPacket) -> DemuxerResult<()>;
}
impl<'a> NAPacketReader for ByteReader<'a> {
fn read_packet(&mut self, str: NAStreamRef, ts: NATimeInfo, kf: bool, size: usize) -> DemuxerResult<NAPacket> {
let mut buf: Vec<u8> = Vec::with_capacity(size);
if buf.capacity() < size { return Err(DemuxerError::MemoryError); }
buf.resize(size, 0);
self.read_buf(buf.as_mut_slice())?;
let pkt = NAPacket::new(str, ts, kf, buf);
Ok(pkt)
}
fn fill_packet(&mut self, pkt: &mut NAPacket) -> DemuxerResult<()> {
let mut refbuf = pkt.get_buffer();
let buf = refbuf.as_mut().unwrap();
self.read_buf(buf.as_mut_slice())?;
Ok(())
}
}
#[derive(Default)]
pub struct StreamManager {
streams: Vec<NAStreamRef>,
ignored: Vec<bool>,
no_ign: bool,
}
impl StreamManager {
pub fn new() -> Self {
StreamManager {
streams: Vec::new(),
ignored: Vec::new(),
no_ign: true,
}
}
pub fn iter(&self) -> StreamIter { StreamIter::new(&self.streams) }
pub fn add_stream(&mut self, stream: NAStream) -> Option<usize> {
let stream_num = self.streams.len();
let mut str = stream.clone();
str.set_num(stream_num);
self.streams.push(str.into_ref());
self.ignored.push(false);
Some(stream_num)
}
pub fn get_stream(&self, idx: usize) -> Option<NAStreamRef> {
if idx < self.streams.len() {
Some(self.streams[idx].clone())
} else {
None
}
}
pub fn get_stream_by_id(&self, id: u32) -> Option<NAStreamRef> {
for i in 0..self.streams.len() {
if self.streams[i].get_id() == id {
return Some(self.streams[i].clone());
}
}
None
}
pub fn get_num_streams(&self) -> usize { self.streams.len() }
pub fn is_ignored(&self, idx: usize) -> bool {
if self.no_ign {
true
} else if idx < self.ignored.len() {
self.ignored[idx]
} else {
false
}
}
pub fn is_ignored_id(&self, id: u32) -> bool {
for i in 0..self.streams.len() {
if self.streams[i].get_id() == id {
return self.ignored[i];
}
}
false
}
pub fn set_ignored(&mut self, idx: usize) {
if idx < self.ignored.len() {
self.ignored[idx] = true;
self.no_ign = false;
}
}
pub fn set_unignored(&mut self, idx: usize) {
if idx < self.ignored.len() {
self.ignored[idx] = false;
}
}
}
pub struct StreamIter<'a> {
streams: &'a [NAStreamRef],
pos: usize,
}
impl<'a> StreamIter<'a> {
pub fn new(streams: &'a [NAStreamRef]) -> Self {
StreamIter { streams, pos: 0 }
}
}
impl<'a> Iterator for StreamIter<'a> {
type Item = NAStreamRef;
fn next(&mut self) -> Option<Self::Item> {
if self.pos >= self.streams.len() { return None; }
let ret = self.streams[self.pos].clone();
self.pos += 1;
Some(ret)
}
}
pub struct Demuxer<'a> {
dmx: Box<dyn DemuxCore<'a> + 'a>,
streams: StreamManager,
}
impl<'a> Demuxer<'a> {
fn new(dmx: Box<dyn DemuxCore<'a> + 'a>, str: StreamManager) -> Self {
Demuxer {
dmx,
streams: str,
}
}
pub fn get_stream(&self, idx: usize) -> Option<NAStreamRef> {
self.streams.get_stream(idx)
}
pub fn get_stream_by_id(&self, id: u32) -> Option<NAStreamRef> {
self.streams.get_stream_by_id(id)
}
pub fn get_num_streams(&self) -> usize {
self.streams.get_num_streams()
}
pub fn get_streams(&self) -> StreamIter {
self.streams.iter()
}
pub fn is_ignored_stream(&self, idx: usize) -> bool {
self.streams.is_ignored(idx)
}
pub fn set_ignored_stream(&mut self, idx: usize) {
self.streams.set_ignored(idx)
}
pub fn set_unignored_stream(&mut self, idx: usize) {
self.streams.set_unignored(idx)
}
pub fn get_frame(&mut self) -> DemuxerResult<NAPacket> {
loop {
let res = self.dmx.get_frame(&mut self.streams);
if self.streams.no_ign || res.is_err() { return res; }
let res = res.unwrap();
let idx = res.get_stream().get_num();
if !self.is_ignored_stream(idx) {
return Ok(res);
}
}
}
pub fn seek(&mut self, time: u64) -> DemuxerResult<()> {
self.dmx.seek(time)
}
}
impl From<ByteIOError> for DemuxerError {
fn from(_: ByteIOError) -> Self { DemuxerError::IOError }
}
///The structure used to create demuxers.
pub trait DemuxerCreator {
/// Create new demuxer instance that will use `ByteReader` source as an input.
fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a>;
/// Get the name of current demuxer creator.
fn get_name(&self) -> &'static str;
}
pub fn create_demuxer<'a>(dmxcr: &DemuxerCreator, br: &'a mut ByteReader<'a>) -> DemuxerResult<Demuxer<'a>> {
let mut dmx = dmxcr.new_demuxer(br);
let mut str = StreamManager::new();
dmx.open(&mut str)?;
Ok(Demuxer::new(dmx, str))
}
#[derive(Default)]
pub struct RegisteredDemuxers {
dmxs: Vec<&'static DemuxerCreator>,
}
impl RegisteredDemuxers {
pub fn new() -> Self {
Self { dmxs: Vec::new() }
}
pub fn add_demuxer(&mut self, dmx: &'static DemuxerCreator) {
self.dmxs.push(dmx);
}
pub fn find_demuxer(&self, name: &str) -> Option<&DemuxerCreator> {
for &dmx in self.dmxs.iter() {
if dmx.get_name() == name {
return Some(dmx);
}
}
None
}
}
|
