make an interface for working with demuxers

[nihav.git] / src / demuxers / mod.rs

diff --git a/src/demuxers/mod.rs b/src/demuxers/mod.rs
index fac5c8251d43bd15a51ee152263130e957abb066..707984bcfca085f8e8d0d3418bff39e09f9eaccb 100644 (file)
--- a/src/demuxers/mod.rs
+++ b/src/demuxers/mod.rs
@@ -1,9 +1,12 @@
+#[cfg(feature="demuxer_gdv")]
 pub mod gdv;
+#[cfg(feature="demuxer_avi")]
+pub mod avi;
 
 use std::fmt;
 use std::rc::Rc;
 use frame::*;
-//use std::collections::HashMap;
+use std::collections::HashMap;
 use io::byteio::*;
 
 #[derive(Debug,Clone,Copy)]
@@ -73,9 +76,16 @@ impl NAPacket {
     }
     pub fn get_stream(&self) -> Rc<NAStream> { self.stream.clone() }
     pub fn get_pts(&self) -> Option<u64> { self.pts }
+    pub fn get_dts(&self) -> Option<u64> { self.dts }
+    pub fn get_duration(&self) -> Option<u64> { self.duration }
+    pub fn is_keyframe(&self) -> bool { self.keyframe }
     pub fn get_buffer(&self) -> Rc<Vec<u8>> { self.buffer.clone() }
 }
 
+impl Drop for NAPacket {
+    fn drop(&mut self) {}
+}
+
 impl fmt::Display for NAPacket {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         let mut foo = format!("[pkt for {} size {}", self.stream, self.buffer.len());
@@ -103,6 +113,8 @@ type DemuxerResult<T> = Result<T, DemuxerError>;
 
 pub trait Demux<'a> {
     fn open(&mut self) -> DemuxerResult<()>;
+    fn get_num_streams(&self) -> usize;
+    fn get_stream(&self, idx: usize) -> Option<Rc<NAStream>>;
     fn get_frame(&mut self) -> DemuxerResult<NAPacket>;
     fn seek(&mut self, time: u64) -> DemuxerResult<()>;
 }
@@ -159,15 +171,46 @@ impl Demuxer {
         }
         None
     }
+    pub fn get_num_streams(&self) -> usize { self.streams.len() }
 }
 
 impl From<ByteIOError> for DemuxerError {
     fn from(_: ByteIOError) -> Self { DemuxerError::IOError }
 }
 
-//impl NADemuxerBuilder {
-//    #[allow(unused_variables)]
-//    pub fn create_demuxer(name: &str, url: &str) -> DemuxerResult<Box<NADemuxer<'static>>> {
-//        unimplemented!()
-//    }
-//}
+pub trait FrameFromPacket {
+    fn new_from_pkt(pkt: &NAPacket, info: Rc<NACodecInfo>) -> NAFrame;
+    fn fill_timestamps(&mut self, pkt: &NAPacket);
+}
+
+impl FrameFromPacket for NAFrame {
+    fn new_from_pkt(pkt: &NAPacket, info: Rc<NACodecInfo>) -> NAFrame {
+        NAFrame::new(pkt.pts, pkt.dts, pkt.duration, info, HashMap::new())
+    }
+    fn fill_timestamps(&mut self, pkt: &NAPacket) {
+        self.set_pts(pkt.pts);
+        self.set_dts(pkt.dts);
+        self.set_duration(pkt.duration);
+    }
+}
+
+pub trait DemuxerCreator {
+    fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<Demux<'a> + 'a>;
+    fn get_name(&self) -> &'static str;
+}
+
+const DEMUXERS: &[&'static DemuxerCreator] = &[
+#[cfg(feature="demuxer_avi")]
+    &avi::AVIDemuxerCreator {},
+#[cfg(feature="demuxer_gdv")]
+    &gdv::GDVDemuxerCreator {},
+];
+
+pub fn find_demuxer(name: &str) -> Option<&DemuxerCreator> {
+    for i in 0..DEMUXERS.len() {
+        if DEMUXERS[i].get_name() == name {
+            return Some(DEMUXERS[i]);
+        }
+    }
+    None
+}