1 #[cfg(feature="demuxer_gdv")]
3 #[cfg(feature="demuxer_avi")]
10 #[derive(Debug,Clone,Copy,PartialEq)]
12 pub enum DemuxerError {
21 type DemuxerResult<T> = Result<T, DemuxerError>;
23 pub trait DemuxCore<'a> {
24 fn open(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<()>;
25 fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket>;
26 fn seek(&mut self, time: u64) -> DemuxerResult<()>;
29 pub trait NAPacketReader {
30 fn read_packet(&mut self, str: Rc<NAStream>, ts: NATimeInfo, keyframe: bool, size: usize) -> DemuxerResult<NAPacket>;
31 fn fill_packet(&mut self, pkt: &mut NAPacket) -> DemuxerResult<()>;
34 impl<'a> NAPacketReader for ByteReader<'a> {
35 fn read_packet(&mut self, str: Rc<NAStream>, ts: NATimeInfo, kf: bool, size: usize) -> DemuxerResult<NAPacket> {
36 let mut buf: Vec<u8> = Vec::with_capacity(size);
37 if buf.capacity() < size { return Err(DemuxerError::MemoryError); }
39 let res = self.read_buf(buf.as_mut_slice());
40 if let Err(_) = res { return Err(DemuxerError::IOError); }
41 let pkt = NAPacket::new(str, ts, kf, buf);
44 fn fill_packet(&mut self, pkt: &mut NAPacket) -> DemuxerResult<()> {
45 let mut refbuf = pkt.get_buffer();
46 let mut buf = Rc::make_mut(&mut refbuf);
47 let res = self.read_buf(buf.as_mut_slice());
48 if let Err(_) = res { return Err(DemuxerError::IOError); }
53 pub struct StreamManager {
54 streams: Vec<Rc<NAStream>>,
60 pub fn new() -> Self {
67 pub fn iter(&self) -> StreamIter { StreamIter::new(&self.streams) }
69 pub fn add_stream(&mut self, stream: NAStream) -> Option<usize> {
70 let stream_num = self.streams.len();
71 let mut str = stream.clone();
72 str.set_num(stream_num);
73 self.streams.push(Rc::new(str));
74 self.ignored.push(false);
77 pub fn get_stream(&self, idx: usize) -> Option<Rc<NAStream>> {
78 if idx < self.streams.len() {
79 Some(self.streams[idx].clone())
84 pub fn get_stream_by_id(&self, id: u32) -> Option<Rc<NAStream>> {
85 for i in 0..self.streams.len() {
86 if self.streams[i].get_id() == id {
87 return Some(self.streams[i].clone());
92 pub fn get_num_streams(&self) -> usize { self.streams.len() }
93 pub fn is_ignored(&self, idx: usize) -> bool {
96 } else if idx < self.ignored.len() {
102 pub fn set_ignored(&mut self, idx: usize) {
103 if idx < self.ignored.len() {
104 self.ignored[idx] = true;
108 pub fn set_unignored(&mut self, idx: usize) {
109 if idx < self.ignored.len() {
110 self.ignored[idx] = false;
115 pub struct StreamIter<'a> {
116 streams: &'a Vec<Rc<NAStream>>,
120 impl<'a> StreamIter<'a> {
121 pub fn new(streams: &'a Vec<Rc<NAStream>>) -> Self {
122 StreamIter { streams: streams, pos: 0 }
126 impl<'a> Iterator for StreamIter<'a> {
127 type Item = Rc<NAStream>;
129 fn next(&mut self) -> Option<Self::Item> {
130 if self.pos >= self.streams.len() { return None; }
131 let ret = self.streams[self.pos].clone();
137 pub struct Demuxer<'a> {
138 dmx: Box<DemuxCore<'a> + 'a>,
139 streams: StreamManager,
142 impl<'a> Demuxer<'a> {
143 fn new(dmx: Box<DemuxCore<'a> + 'a>, str: StreamManager) -> Self {
149 pub fn get_stream(&self, idx: usize) -> Option<Rc<NAStream>> {
150 self.streams.get_stream(idx)
152 pub fn get_stream_by_id(&self, id: u32) -> Option<Rc<NAStream>> {
153 self.streams.get_stream_by_id(id)
155 pub fn get_num_streams(&self) -> usize {
156 self.streams.get_num_streams()
158 pub fn get_streams(&self) -> StreamIter {
161 pub fn is_ignored_stream(&self, idx: usize) -> bool {
162 self.streams.is_ignored(idx)
164 pub fn set_ignored_stream(&mut self, idx: usize) {
165 self.streams.set_ignored(idx)
167 pub fn set_unignored_stream(&mut self, idx: usize) {
168 self.streams.set_unignored(idx)
171 pub fn get_frame(&mut self) -> DemuxerResult<NAPacket> {
173 let res = self.dmx.get_frame(&mut self.streams);
174 if self.streams.no_ign || res.is_err() { return res; }
175 let res = res.unwrap();
176 let idx = res.get_stream().get_num();
177 if !self.is_ignored_stream(idx) {
182 pub fn seek(&mut self, time: u64) -> DemuxerResult<()> {
187 impl From<ByteIOError> for DemuxerError {
188 fn from(_: ByteIOError) -> Self { DemuxerError::IOError }
191 ///The structure used to create demuxers.
192 pub trait DemuxerCreator {
193 /// Create new demuxer instance that will use `ByteReader` source as an input.
194 fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<DemuxCore<'a> + 'a>;
195 /// Get the name of current demuxer creator.
196 fn get_name(&self) -> &'static str;
199 const DEMUXERS: &[&'static DemuxerCreator] = &[
200 #[cfg(feature="demuxer_avi")]
201 &avi::AVIDemuxerCreator {},
202 #[cfg(feature="demuxer_gdv")]
203 &gdv::GDVDemuxerCreator {},
206 pub fn find_demuxer(name: &str) -> Option<&DemuxerCreator> {
207 for &dmx in DEMUXERS {
208 if dmx.get_name() == name {
215 pub fn create_demuxer<'a>(dmxcr: &DemuxerCreator, br: &'a mut ByteReader<'a>) -> DemuxerResult<Demuxer<'a>> {
216 let mut dmx = dmxcr.new_demuxer(br);
217 let mut str = StreamManager::new();
219 Ok(Demuxer::new(dmx, str))