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sdp: reject duplicate codecs with the same id but different name or clockrate

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since something like
  rtpmap:96 VP8/90000
  rtpmap:96 VP9/90000
or
  rtpmap:97 ISAC/32000
  rtpmap:97 ISAC/16000
is wrong. Note that fmtp or rtcp-fb are not taken into account.
Also note that sending invalid static payload types now throws an error.

Drive-by: replace "RtpMap" with "Rtpmap" for consistency.

BUG=None

Change-Id: I2574b82a6f1a0afe3edc866e514a5dbca0798e8c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/263641
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Philipp Hancke <philipp.hancke@googlemail.com>
Cr-Commit-Position: refs/heads/main@{#37028}
This commit is contained in:
Philipp Hancke
2022-05-30 08:45:41 +02:00
committed by WebRTC LUCI CQ
parent fc2c24ef44
commit ad6807805d
3 changed files with 59 additions and 10 deletions
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31
pc/webrtc_sdp_unittest.cc
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@ -2427,7 +2427,7 @@ TEST_F(WebRtcSdpTest, DeserializeSessionDescriptionWithoutRtpmap) {
// Codec that doesn't appear in the m= line will be ignored.
"a=rtpmap:104 ISAC/32000\r\n"
// The rtpmap line for static payload codec is optional.
"a=rtpmap:18 G729/16000\r\n"
"a=rtpmap:18 G729/8000\r\n"
"a=rtpmap:103 ISAC/16000\r\n";
JsepSessionDescription jdesc(kDummyType);
@ -2438,7 +2438,7 @@ TEST_F(WebRtcSdpTest, DeserializeSessionDescriptionWithoutRtpmap) {
// The codecs in the AudioContentDescription should be in the same order as
// the payload types (<fmt>s) on the m= line.
ref_codecs.push_back(AudioCodec(0, "PCMU", 8000, 0, 1));
ref_codecs.push_back(AudioCodec(18, "G729", 16000, 0, 1));
ref_codecs.push_back(AudioCodec(18, "G729", 8000, 0, 1));
ref_codecs.push_back(AudioCodec(103, "ISAC", 16000, 0, 1));
EXPECT_EQ(ref_codecs, audio->codecs());
}
@ -4658,6 +4658,33 @@ TEST_F(WebRtcSdpTest, MaxChannels) {
ExpectParseFailure(sdp, "a=rtpmap:108 ISAC/16000/512");
}
TEST_F(WebRtcSdpTest, DuplicateAudioRtpmapWithConflict) {
std::string sdp =
"v=0\r\n"
"o=- 11 22 IN IP4 127.0.0.1\r\n"
"s=-\r\n"
"t=0 0\r\n"
"m=audio 49232 RTP/AVP 108\r\n"
// Same name but different payload type.
"a=rtpmap:108 ISAC/16000\r\n"
"a=rtpmap:108 ISAC/32000\r\n";
ExpectParseFailure(sdp, "a=rtpmap:108 ISAC/32000");
}
TEST_F(WebRtcSdpTest, DuplicateVideoRtpmapWithConflict) {
std::string sdp =
"v=0\r\n"
"o=- 11 22 IN IP4 127.0.0.1\r\n"
"s=-\r\n"
"t=0 0\r\n"
"m=video 49232 RTP/AVP 108\r\n"
"a=rtpmap:108 VP8/90000\r\n"
"a=rtpmap:108 VP9/90000\r\n";
ExpectParseFailure(sdp, "a=rtpmap:108 VP9/90000");
}
// This tests parsing of SDP with unknown ssrc-specific attributes.
TEST_F(WebRtcSdpTest, ParseIgnoreUnknownSsrcSpecificAttribute) {
std::string sdp = kSdpString;