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Revert "h264: fix first_packet_in_frame logic for multislice in a single rtp packet"

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This reverts commit 3753c8190e3f0aca6758a5521e33f8b5d4f09ab4.

Reason for revert: Break assembling of hardware encoded h264 P frame on
weak network condition.

Original change's description:
> h264: fix first_packet_in_frame logic for multislice in a single rtp packet
>
> a frame must be (or should be) first when it contains either SPS (but not just PPS),
> is an IDR or is a slice with first_mb_in_slice == 0.
>
> Fixes an edge case where a STAP-A with SPS, PPS and multiple slices of an IDR fit
> into a single RTP packet which can happen with small 320x196 frames
>
> BUG=webrtc:352379280,webrtc:346608838
>
> Change-Id: Ic6dea6c81db759d0d7ddd4054407103fd791f6c5
> No-Try: true
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/357121
> Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
> Commit-Queue: Sergey Silkin <ssilkin@webrtc.org>
> Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
> Cr-Commit-Position: refs/heads/main@{#42652}

Bug: webrtc:368335257
Change-Id: I07725c78be628bff71b79b8b9369677e39f5f5ac
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/363080
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Philipp Hancke <phancke@meta.com>
Cr-Commit-Position: refs/heads/main@{#43062}
This commit is contained in:
Gao Chun 2024-09-20 08:20:30 +00:00 committed by WebRTC LUCI CQ
parent b6ee51b7a5
commit bdc669347c
3 changed files with 6 additions and 70 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
AUTHORS
View File

@ -53,6 +53,7 @@ Eike Rathke <erathke@redhat.com>
Eric Rescorla, RTFM Inc. <ekr@rtfm.com>
Filip Hlasek <filip@orcamobility.ai>
Frederik Riedel, Frogg GmbH <frederik.riedel@frogg.io>
Gao Chun <gaochun.dev@gmail.com>
Giji Gangadharan <giji.g@samsung.com>
Graham Yoakum <gyoakum@skobalt.com>
Gustavo Garcia <gustavogb@gmail.com>

11
modules/rtp_rtcp/source/video_rtp_depacketizer_h264.cc
View File

@ -70,7 +70,7 @@ std::optional<VideoRtpDepacketizer::ParsedRtpPayload> ProcessStapAOrSingleNalu(
parsed_payload->video_header.height = 0;
parsed_payload->video_header.codec = kVideoCodecH264;
parsed_payload->video_header.simulcastIdx = 0;
parsed_payload->video_header.is_first_packet_in_frame = false;
parsed_payload->video_header.is_first_packet_in_frame = true;
auto& h264_header = parsed_payload->video_header.video_type_header
.emplace<RTPVideoHeaderH264>();
@ -121,7 +121,8 @@ std::optional<VideoRtpDepacketizer::ParsedRtpPayload> ProcessStapAOrSingleNalu(
switch (nalu.type) {
case H264::NaluType::kSps: {
// Check if VUI is present in SPS and if it needs to be modified to
// avoid excessive decoder latency.
// avoid
// excessive decoder latency.
// Copy any previous data first (likely just the first header).
rtc::Buffer output_buffer;
@ -174,7 +175,6 @@ std::optional<VideoRtpDepacketizer::ParsedRtpPayload> ProcessStapAOrSingleNalu(
VideoFrameType::kVideoFrameKey;
break;
}
parsed_payload->video_header.is_first_packet_in_frame = true;
break;
}
case H264::NaluType::kPps: {
@ -199,9 +199,8 @@ std::optional<VideoRtpDepacketizer::ParsedRtpPayload> ProcessStapAOrSingleNalu(
PpsParser::ParseSliceHeader(nalu_data);
if (slice_header) {
nalu.pps_id = slice_header->pic_parameter_set_id;
if (slice_header->first_mb_in_slice == 0) {
parsed_payload->video_header.is_first_packet_in_frame = true;
}
parsed_payload->video_header.is_first_packet_in_frame &=
slice_header->first_mb_in_slice == 0;
} else {
RTC_LOG(LS_WARNING) << "Failed to parse PPS id from slice of type: "
<< static_cast<int>(nalu.type);

64
modules/rtp_rtcp/source/video_rtp_depacketizer_h264_unittest.cc
View File

@ -439,69 +439,5 @@ TEST(VideoRtpDepacketizerH264Test, BadSlice) {
EXPECT_FALSE(depacketizer.Parse(rtc::CopyOnWriteBuffer(kPayload)));
}
TEST(VideoRtpDepacketizerH264Test, StapASpsPpsMultiSlice) {
// A STAP-A containing a black 320x192 key frame with multiple slices.
const uint8_t kPayload[] = {
// clang-format off
0x67, 0x42, 0xc0, 0x15, 0x8c, 0x68, 0x14, 0x19, // SPS.
0x79, 0xe0, 0x1e, 0x11, 0x08, 0xd4, 0x00, 0x04, 0x68, 0xce, 0x3c, 0x80,
0x00, 0x2e, // PPS.
// Slices.
0x65, 0xb8, 0x00, 0x04, 0x08, 0x79, 0x31, 0x40, 0x00, 0x42, 0xae, 0x4d,
0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9,
0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xd6, 0xeb, 0xae, 0xba, 0xeb, 0xae,
0xba, 0xeb, 0xae, 0xba, 0xeb, 0xae, 0xba, 0xeb, 0xae, 0xbc, 0x00, 0x2f,
0x65, 0x05, 0x2e, 0x00, 0x01, 0x02, 0x1e, 0x4c, 0x50, 0x00, 0x10, 0xab,
0x93, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72,
0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x75, 0xba, 0xeb, 0xae, 0xba,
0xeb, 0xae, 0xba, 0xeb, 0xae, 0xba, 0xeb, 0xae, 0xba, 0xeb, 0xaf, 0x00,
0x30, 0x65, 0x02, 0x8b, 0x80, 0x00, 0x40, 0x87, 0x93, 0x14, 0x00, 0x04,
0x2a, 0xe4, 0xdc, 0x9c, 0x9c, 0x9c, 0x9c, 0x9c, 0x9c, 0x9c, 0x9c, 0x9c,
0x9c, 0x9c, 0x9c, 0x9c, 0x9c, 0x9c, 0x9c, 0x9c, 0x9d, 0x6e, 0xba, 0xeb,
0xae, 0xba, 0xeb, 0xae, 0xba, 0xeb, 0xae, 0xba, 0xeb, 0xae, 0xba, 0xeb,
0xc0, 0x00, 0x30, 0x65, 0x03, 0xcb, 0x80, 0x00, 0x40, 0x87, 0x93, 0x14,
0x00, 0x04, 0x2a, 0xe4, 0xdc, 0x9c, 0x9c, 0x9c, 0x9c, 0x9c, 0x9c, 0x9c,
0x9c, 0x9c, 0x9c, 0x9c, 0x9c, 0x9c, 0x9c, 0x9c, 0x9c, 0x9c, 0x9d, 0x6e,
0xba, 0xeb, 0xae, 0xba, 0xeb, 0xae, 0xba, 0xeb, 0xae, 0xba, 0xeb, 0xae,
0xba, 0xeb, 0xc0, 0x00, 0x30, 0x65, 0x01, 0x42, 0xe0, 0x00, 0x10, 0x21,
0xe4, 0xc5, 0x00, 0x01, 0x0a, 0xb9, 0x37, 0x27, 0x27, 0x27, 0x27, 0x27,
0x27, 0x27, 0x27, 0x27, 0x27, 0x27, 0x27, 0x27, 0x27, 0x27, 0x27, 0x27,
0x27, 0x5b, 0xae, 0xba, 0xeb, 0xae, 0xba, 0xeb, 0xae, 0xba, 0xeb, 0xae,
0xba, 0xeb, 0xae, 0xba, 0xf0, 0x00, 0x30, 0x65, 0x01, 0x92, 0xe0, 0x00,
0x10, 0x21, 0xe4, 0xc5, 0x00, 0x01, 0x0a, 0xb9, 0x37, 0x27, 0x27, 0x27,
0x27, 0x27, 0x27, 0x27, 0x27, 0x27, 0x27, 0x27, 0x27, 0x27, 0x27, 0x27,
0x27, 0x27, 0x27, 0x5b, 0xae, 0xba, 0xeb, 0xae, 0xba, 0xeb, 0xae, 0xba,
0xeb, 0xae, 0xba, 0xeb, 0xae, 0xba, 0xf0
// clang-format on
};
VideoRtpDepacketizerH264 depacketizer;
std::optional<VideoRtpDepacketizer::ParsedRtpPayload> parsed =
depacketizer.Parse(rtc::CopyOnWriteBuffer(kPayload));
ASSERT_TRUE(parsed);
EXPECT_TRUE(parsed->video_header.is_first_packet_in_frame);
}
TEST(VideoRtpDepacketizerH264Test, SecondSliceIdrNalu) {
// First few bytes of a second slice of an IDR nalu with
// first_mb_in_slice = 480.
const uint8_t kPayload[] = {
// clang-format off
0x65, 0x00, 0xf0, 0x88, 0x82, 0x01, 0x3b, 0xff, 0xdf, 0xfe, 0x0b, 0xbb,
0xfc, 0xb4, 0x30, 0xd1, 0x00, 0xef, 0xfd, 0xef, 0x0e, 0x79, 0x8b, 0x74,
0x9b, 0x44, 0xf3, 0xb8, 0x65, 0x8f, 0xa1, 0x92, 0x30, 0xf9, 0x40, 0x06,
0xb0, 0x00, 0x00, 0x03, 0x00, 0x00, 0x03, 0x00, 0x00, 0x03, 0x00, 0x00,
0x03, 0x00, 0x18, 0x87, 0x4f, 0x6a, 0xfe, 0x60, 0x03, 0x9f, 0xfe, 0xd8,
0x8b, 0xa6, 0x67, 0x31
// clang-format on
};
VideoRtpDepacketizerH264 depacketizer;
std::optional<VideoRtpDepacketizer::ParsedRtpPayload> parsed =
depacketizer.Parse(rtc::CopyOnWriteBuffer(kPayload));
ASSERT_TRUE(parsed);
EXPECT_FALSE(parsed->video_header.is_first_packet_in_frame);
}
} // namespace
} // namespace webrtc