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Unify RTP payload type validity checking

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making the UsedId generator the source of truth.
BUG=webrtc:12197

Change-Id: I4318a1366f8b2e20ea5ae264232437a9006c5103
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/321120
Commit-Queue: Philipp Hancke <phancke@microsoft.com>
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#40802}
This commit is contained in:
Philipp Hancke 2023-09-25 14:42:51 +02:00 committed by WebRTC LUCI CQ
parent 6bf2d31e71
commit 7d1aff6eed
3 changed files with 16 additions and 14 deletions
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1
pc/BUILD.gn
View file

@ -1108,6 +1108,7 @@ rtc_source_set("sdp_offer_answer") {
":stream_collection",
":transceiver_list",
":usage_pattern",
":used_ids",
":webrtc_session_description_factory",
"../api:array_view",
"../api:audio_options_api",

19
pc/sdp_offer_answer.cc
View file

@ -53,6 +53,7 @@
#include "pc/rtp_sender_proxy.h"
#include "pc/simulcast_description.h"
#include "pc/usage_pattern.h"
#include "pc/used_ids.h"
#include "pc/webrtc_session_description_factory.h"
#include "rtc_base/helpers.h"
#include "rtc_base/logging.h"
@ -120,12 +121,6 @@ const char kDefaultStreamId[] = "default";
static const char kDefaultAudioSenderId[] = "defaulta0";
static const char kDefaultVideoSenderId[] = "defaultv0";
// NOTE: Duplicated from pc/used_ids.h
static const int kLastDynamicPayloadTypeLowerRange = 63;
static const int kFirstDynamicPayloadTypeUpperRange = 96;
static const int kLastDynamicPayloadTypeUpperRange = 127;
void NoteAddIceCandidateResult(int result) {
RTC_HISTOGRAM_ENUMERATION("WebRTC.PeerConnection.AddIceCandidate", result,
kAddIceCandidateMax);
@ -574,10 +569,8 @@ RTCError ValidatePayloadTypes(const cricket::SessionDescription& description) {
if (type == cricket::MEDIA_TYPE_AUDIO) {
RTC_DCHECK(media_description->as_audio());
for (const auto& codec : media_description->as_audio()->codecs()) {
if (codec.id < 0 || codec.id > kLastDynamicPayloadTypeUpperRange ||
(media_description->rtcp_mux() &&
(codec.id > kLastDynamicPayloadTypeLowerRange &&
codec.id < kFirstDynamicPayloadTypeUpperRange))) {
if (!cricket::UsedPayloadTypes::IsIdValid(
codec, media_description->rtcp_mux())) {
LOG_AND_RETURN_ERROR(
RTCErrorType::INVALID_PARAMETER,
"The media section with MID='" + content.mid() +
@ -589,10 +582,8 @@ RTCError ValidatePayloadTypes(const cricket::SessionDescription& description) {
} else if (type == cricket::MEDIA_TYPE_VIDEO) {
RTC_DCHECK(media_description->as_video());
for (const auto& codec : media_description->as_video()->codecs()) {
if (codec.id < 0 || codec.id > kLastDynamicPayloadTypeUpperRange ||
(media_description->rtcp_mux() &&
(codec.id > kLastDynamicPayloadTypeLowerRange &&
codec.id < kFirstDynamicPayloadTypeUpperRange))) {
if (!cricket::UsedPayloadTypes::IsIdValid(
codec, media_description->rtcp_mux())) {
LOG_AND_RETURN_ERROR(
RTCErrorType::INVALID_PARAMETER,
"The media section with MID='" + content.mid() +

10
pc/used_ids.h
View file

@ -96,6 +96,16 @@ class UsedPayloadTypes : public UsedIds<Codec> {
: UsedIds<Codec>(kFirstDynamicPayloadTypeLowerRange,
kLastDynamicPayloadTypeUpperRange) {}
// Check if a payload type is valid. The range [64-95] is forbidden
// when rtcp-mux is used.
static bool IsIdValid(Codec codec, bool rtcp_mux) {
if (rtcp_mux && (codec.id > kLastDynamicPayloadTypeLowerRange &&
codec.id < kFirstDynamicPayloadTypeUpperRange)) {
return false;
}
return codec.id >= 0 && codec.id <= kLastDynamicPayloadTypeUpperRange;
}
protected:
bool IsIdUsed(int new_id) override {
// Range marked for RTCP avoidance is "used".