X-Git-Url: https://code.octet-stream.net/m17rt/blobdiff_plain/8d1ce395337cf7d508500b13c574eaeb401f1e77..e307431f908eedae321aa86565fd5e213d758216:/m17core/src/decode.rs

diff --git a/m17core/src/decode.rs b/m17core/src/decode.rs
old mode 100755
new mode 100644
index 86567d9..4bc6288
--- a/m17core/src/decode.rs
+++ b/m17core/src/decode.rs
@@ -3,8 +3,8 @@ use crate::{
     fec::{self, p_1, p_2, p_3},
     interleave::interleave,
     protocol::{
-        LsfFrame, PacketFrame, PacketFrameCounter, StreamFrame, BERT_SYNC, LSF_SYNC, PACKET_SYNC,
-        STREAM_SYNC,
+        BERT_SYNC, END_OF_TRANSMISSION, LSF_SYNC, LsfFrame, PACKET_SYNC, PREAMBLE, PacketFrame,
+        PacketFrameCounter, STREAM_SYNC, StreamFrame,
     },
     random::random_xor,
 };
@@ -33,6 +33,8 @@ pub(crate) enum SyncBurst {
     Bert,
     Stream,
     Packet,
+    Preamble,
+    EndOfTransmission,
 }
 
 impl SyncBurst {
@@ -42,6 +44,8 @@ impl SyncBurst {
             Self::Bert => BERT_SYNC,
             Self::Stream => STREAM_SYNC,
             Self::Packet => PACKET_SYNC,
+            Self::Preamble => PREAMBLE,
+            Self::EndOfTransmission => END_OF_TRANSMISSION,
         }
     }
 }
@@ -110,10 +114,7 @@ pub(crate) fn parse_lsf(frame: &[f32] /* length 192 */) -> Option<LsfFrame> {
 pub(crate) fn parse_stream(frame: &[f32] /* length 192 */) -> Option<StreamFrame> {
     let deinterleaved = frame_initial_decode(frame);
     let stream_part = &deinterleaved[12..];
-    let stream = match fec::decode(stream_part, 144, p_2) {
-        Some(stream) => stream,
-        None => return None,
-    };
+    let stream = fec::decode(stream_part, 144, p_2)?;
     let frame_num = u16::from_be_bytes([stream[0], stream[1]]);
     let eos = (frame_num & 0x8000) > 0;
     let frame_num = frame_num & 0x7fff; // higher layer has to handle wraparound
@@ -138,12 +139,7 @@ pub(crate) fn parse_stream(frame: &[f32] /* length 192 */) -> Option<StreamFrame
 
 pub(crate) fn parse_packet(frame: &[f32] /* length 192 */) -> Option<PacketFrame> {
     let deinterleaved = frame_initial_decode(frame);
-    let packet = match fec::decode(&deinterleaved, 206, p_3) {
-        Some(packet) => packet,
-        None => return None,
-    };
-    // TODO: the spec is inconsistent about which bit in packet[25] is EOF
-    // https://github.com/M17-Project/M17_spec/issues/147
+    let packet = fec::decode(&deinterleaved, 206, p_3)?;
     let final_frame = (packet[25] & 0x80) > 0;
     let number = (packet[25] >> 2) & 0x1f;
     let counter = if final_frame {