ignore unparseable SDP media

https://github.com/scottlamb/moonfire-nvr/issues/238

CHANGELOG.md

@@ -1,3 +1,8 @@
+## `v0.4.2` (2022-09-28)
+
+*   ignore unparseable SDP media, improving compatibility with TP-Link cameras,
+    as described in [scottlamb/moonfire-nvr#238](https://github.com/scottlamb/moonfire-nvr/issues/238).
+
 ## `v0.4.1` (2022-08-09)
 
 *   Send keepalives at every half-session-timeout rather than a fixed 30-second

Cargo.lock

@@ -1780,7 +1780,7 @@ checksum = "a3f87b73ce11b1619a3c6332f45341e0047173771e8b8b73f87bfeefb7b56244"
 
 [[package]]
 name = "retina"
-version = "0.4.1"
+version = "0.4.2"
 dependencies = [
  "base64",
  "bitreader",

Cargo.toml

@@ -4,7 +4,7 @@ default-members = ["."]
 
 [package]
 name = "retina"
-version = "0.4.1"
+version = "0.4.2"
 authors = ["Scott Lamb <slamb@slamb.org>"]
 license = "MIT/Apache-2.0"
 edition = "2021"

src/client/parse.rs

@@ -452,19 +452,30 @@ pub(crate) fn parse_describe(
     }
     let control = control.unwrap_or(request_url);
 
-    let streams = sdp
+    let streams: Box<[Stream]> = sdp
         .medias
         .iter()
         .enumerate()
-        .map(|(i, m)| {
-            parse_media(&base_url, m).map_err(|e| {
-                format!(
-                    "Unable to parse stream {}: {}\nraw SDP: {:#?}",
+        .filter_map(|(i, m)| {
+            parse_media(&base_url, m).map_or_else(
+                |e| {
+                    warn!(
+                        "Ignoring unparseable stream {}: {}\nraw SDP: {:#?}",
                         i, &e, raw_sdp
+                    );
+                    None
+                },
+                Some,
             )
         })
-        })
-        .collect::<Result<_, String>>()?;
+        .collect();
+
+    if streams.is_empty() {
+        return Err(format!(
+            "No parseable streams (and {} unparseable streams)",
+            sdp.medias.len()
+        ));
+    }
 
     Ok(Presentation {
         streams,
@@ -757,6 +768,23 @@ mod tests {
         super::parse_describe(url, &response).unwrap();
     }
 
+    /// Parses SDP taken from a TP-LINK TL-IPC44AW-COLOR 4.0 camera running firmware
+    /// FW: 1.0.10 Build 220330 Rel.35741n, which has a stream with a string where an RTP
+    /// payload description is expected.
+    /// https://github.com/scottlamb/moonfire-nvr/issues/238
+    #[test]
+    fn tplink_sdp() {
+        let url = Url::parse("rtsp://127.0.0.1/").unwrap();
+        let response =
+            rtsp_types::Response::builder(rtsp_types::Version::V1_0, rtsp_types::StatusCode::Ok)
+                .header(rtsp_types::headers::CONTENT_TYPE, "application/sdp")
+                .build(Bytes::from_static(include_bytes!(
+                    "testdata/tplink_sdp.txt"
+                )));
+        let p = super::parse_describe(url, &response).unwrap();
+        assert_eq!(p.streams.len(), 2);
+    }
+
     #[test]
     fn dahua_h264_aac_onvif() {
         // DESCRIBE.

src/client/testdata/tplink_sdp.txt

@@ -0,0 +1,17 @@
+v=0
+o=- 14665860 31787219 1 IN IP4 192.168.2.29
+s=Session streamed by "TP-LINK RTSP Server"
+t=0 0
+m=video 0 RTP/AVP 96
+c=IN IP4 0.0.0.0
+b=AS:4096
+a=range:npt=0-
+a=control:track1
+a=rtpmap:96 H265/90000
+a=fmtp:96 profile-space=0;profile-id=1;tier-flag=0;level-id=150;interop-constraints=000000000000;sprop-vps=QAEMAf//AWAAAAMAAAMAAAMAAAMAlqwJ;sprop-sps=QgEBAWAAAAMAAAMAAAMAAAMAlqABQCAFof4qtO6JLuaAgA27oADN/mAE;sprop-pps=RAHAcvAbJA==
+m=audio 0 RTP/AVP 8
+a=rtpmap:8 PCMA/8000
+a=control:track2
+m=application/TP-LINK 0 RTP/AVP smart/1/90000
+a=rtpmap:95 TP-LINK/90000
+a=control:track3