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Pick H265 payload type from lower dynamic PT range

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as the "upper range" is already filled and new codecs should prefer the
lower dynamic PT range.

drive-by: restore audio/red behavior too even though in practice it has
not changed.

BUG=chromium:391903235

Change-Id: Iefc78253bf0fe88567f9032059ead3c2557e36a1
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/376520
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Philipp Hancke <phancke@meta.com>
Cr-Commit-Position: refs/heads/main@{#43866}
This commit is contained in:
Philipp Hancke 2025-02-06 14:42:59 -08:00 committed by WebRTC LUCI CQ
parent 1ad51fe73c
commit 9bbd4d34e9
2 changed files with 21 additions and 5 deletions
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5
call/payload_type_picker.cc
View File

@ -54,10 +54,11 @@ struct MapTableEntry {
bool CodecPrefersLowerRange(const cricket::Codec& codec) {
// All audio codecs prefer upper range.
if (codec.type == cricket::Codec::Type::kAudio) {
return false;
return absl::EqualsIgnoreCase(codec.name, cricket::kRedCodecName);
}
if (absl::EqualsIgnoreCase(codec.name, cricket::kFlexfecCodecName) ||
absl::EqualsIgnoreCase(codec.name, cricket::kAv1CodecName)) {
absl::EqualsIgnoreCase(codec.name, cricket::kAv1CodecName) ||
absl::EqualsIgnoreCase(codec.name, cricket::kH265CodecName)) {
return true;
} else if (absl::EqualsIgnoreCase(codec.name, cricket::kH264CodecName)) {
std::string profile_level_id;

21
call/payload_type_picker_unittest.cc
View File

@ -21,6 +21,7 @@ namespace webrtc {
using testing::Eq;
using testing::Ge;
using testing::Le;
using testing::Lt;
using testing::Ne;
@ -189,6 +190,14 @@ TEST(PayloadTypePicker, AudioGetsHigherRange) {
EXPECT_THAT(result, Ge(96));
}
TEST(PayloadTypePicker, AudioRedGetsLowerRange) {
PayloadTypePicker picker;
cricket::Codec an_audio_codec =
cricket::CreateAudioCodec(-1, "red", 48000, 2);
auto result = picker.SuggestMapping(an_audio_codec, nullptr).value();
EXPECT_THAT(result, Le(63));
}
TEST(PayloadTypePicker, VideoGetsTreatedSpecially) {
PayloadTypePicker picker;
cricket::Codec h264_constrained = cricket::CreateVideoCodec(SdpVideoFormat(
@ -203,17 +212,23 @@ TEST(PayloadTypePicker, VideoGetsTreatedSpecially) {
{cricket::kVp9CodecName, {{cricket::kVP9ProfileId, "2"}}}));
cricket::Codec vp9_profile_3 = cricket::CreateVideoCodec(SdpVideoFormat(
{cricket::kVp9CodecName, {{cricket::kVP9ProfileId, "3"}}}));
cricket::Codec h265 = cricket::CreateVideoCodec(SdpVideoFormat(
cricket::kH265CodecName, {{cricket::kH265FmtpProfileId, "1"},
{cricket::kH265FmtpTierFlag, "0"},
{cricket::kH265FmtpLevelId, "93"},
{cricket::kH265FmtpTxMode, "SRST"}}));
// Valid for high range only.
EXPECT_THAT(picker.SuggestMapping(h264_constrained, nullptr).value(), Ge(96));
EXPECT_THAT(picker.SuggestMapping(vp9_profile_2, nullptr).value(), Ge(96));
// Valid for lower range.
EXPECT_THAT(picker.SuggestMapping(h264_yuv444, nullptr).value(), Lt(63));
EXPECT_THAT(picker.SuggestMapping(vp9_profile_3, nullptr).value(), Lt(63));
EXPECT_THAT(picker.SuggestMapping(h264_yuv444, nullptr).value(), Le(63));
EXPECT_THAT(picker.SuggestMapping(vp9_profile_3, nullptr).value(), Le(63));
EXPECT_THAT(picker.SuggestMapping(h265, nullptr).value(), Le(63));
// RTX with a primary codec in the lower range is valid for lower range.
cricket::Codec lower_range_rtx =
cricket::CreateVideoRtxCodec(cricket::Codec::kIdNotSet, 63);
EXPECT_THAT(picker.SuggestMapping(lower_range_rtx, nullptr).value(), Lt(63));
EXPECT_THAT(picker.SuggestMapping(lower_range_rtx, nullptr).value(), Le(63));
}
TEST(PayloadTypePicker, ChoosingH264Profiles) {