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/*
* Copyright (c) 2024 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <cstdint>
#include <iterator>
#include <memory>
#include <optional>
#include <utility>
#include <vector>
#include "api/array_view.h"
#include "api/video/encoded_frame.h"
#include "api/video/rtp_video_frame_assembler.h"
#include "api/video/video_codec_type.h"
#include "api/video/video_frame_type.h"
#include "modules/rtp_rtcp/source/rtp_format.h"
#include "modules/rtp_rtcp/source/rtp_packet_received.h"
#include "modules/rtp_rtcp/source/rtp_packet_to_send.h"
#include "modules/rtp_rtcp/source/rtp_video_header.h"
#include "rtc_base/checks.h"
#include "test/gmock.h"
#include "test/gtest.h"
namespace webrtc {
namespace {
using ::testing::ElementsAreArray;
using ::testing::Eq;
using ::testing::IsEmpty;
using ::testing::SizeIs;
using ::testing::UnorderedElementsAre;
using PayloadFormat = RtpVideoFrameAssembler::PayloadFormat;
class PacketBuilder {
public:
explicit PacketBuilder(PayloadFormat format)
: format_(format), packet_to_send_(&extension_manager_) {}
PacketBuilder& WithSeqNum(uint16_t seq_num) {
seq_num_ = seq_num;
return *this;
}
PacketBuilder& WithPayload(ArrayView<const uint8_t> payload) {
payload_.assign(payload.begin(), payload.end());
return *this;
}
PacketBuilder& WithVideoHeader(const RTPVideoHeader& video_header) {
video_header_ = video_header;
return *this;
}
template <typename T, typename... Args>
PacketBuilder& WithExtension(int id, const Args&... args) {
extension_manager_.Register<T>(id);
packet_to_send_.IdentifyExtensions(extension_manager_);
packet_to_send_.SetExtension<T>(std::forward<const Args>(args)...);
return *this;
}
RtpPacketReceived Build() {
auto packetizer =
RtpPacketizer::Create(GetVideoCodecType(), payload_, {}, video_header_);
packetizer->NextPacket(&packet_to_send_);
packet_to_send_.SetSequenceNumber(seq_num_);
RtpPacketReceived received(&extension_manager_);
received.Parse(packet_to_send_.Buffer());
return received;
}
private:
std::optional<VideoCodecType> GetVideoCodecType() {
switch (format_) {
case PayloadFormat::kH265: {
return kVideoCodecH265;
}
default:
RTC_DCHECK_NOTREACHED();
return std::nullopt;
}
}
const RtpVideoFrameAssembler::PayloadFormat format_;
uint16_t seq_num_ = 0;
std::vector<uint8_t> payload_;
RTPVideoHeader video_header_;
RtpPacketReceived::ExtensionManager extension_manager_;
RtpPacketToSend packet_to_send_;
};
void AppendFrames(RtpVideoFrameAssembler::FrameVector&& from,
RtpVideoFrameAssembler::FrameVector& to) {
to.insert(to.end(), std::make_move_iterator(from.begin()),
std::make_move_iterator(from.end()));
}
ArrayView<int64_t> References(const std::unique_ptr<EncodedFrame>& frame) {
return MakeArrayView(frame->references, frame->num_references);
}
ArrayView<uint8_t> Payload(const std::unique_ptr<EncodedFrame>& frame) {
return ArrayView<uint8_t>(*frame->GetEncodedData());
}
TEST(RtpVideoFrameH265Assembler, H265Packetization) {
RtpVideoFrameAssembler assembler(RtpVideoFrameAssembler::kH265);
RtpVideoFrameAssembler::FrameVector frames;
// Key and delta frames generated on linux with ffmpeg command:
// `ffmpeg -i /dev/video0 -r 30 -c:v libx265 -s 1280x720 camera.h265`,
// truncated for test.
// IDR_N_LP(key) frame with start code included.
uint8_t kIdrPayload[] = {0x00, 0x00, 0x00, 0x01, 0x28, 0x01, 0xaf,
0x08, 0x4a, 0x31, 0x11, 0x15, 0xe5, 0xc0};
// TRAIL_R(delta) frame with start code included.
uint8_t kDeltaPayload[] = {0x00, 0x00, 0x00, 0x01, 0x02, 0x01, 0xd0,
0x09, 0x7e, 0x10, 0xc6, 0x1c, 0x8c, 0x17};
RTPVideoHeader video_header;
video_header.frame_type = VideoFrameType::kVideoFrameKey;
RtpVideoFrameAssembler::FrameVector idr_frames =
assembler.InsertPacket(PacketBuilder(PayloadFormat::kH265)
.WithPayload(kIdrPayload)
.WithVideoHeader(video_header)
.WithSeqNum(10)
.Build());
AppendFrames(std::move(idr_frames), frames);
RtpVideoFrameAssembler::FrameVector delta_frames =
assembler.InsertPacket(PacketBuilder(PayloadFormat::kH265)
.WithPayload(kDeltaPayload)
.WithSeqNum(11)
.Build());
AppendFrames(std::move(delta_frames), frames);
ASSERT_THAT(frames, SizeIs(2));
auto first_frame = frames[0].ExtractFrame();
EXPECT_THAT(first_frame->Id(), Eq(10));
EXPECT_THAT(Payload(first_frame), ElementsAreArray(kIdrPayload));
EXPECT_THAT(References(first_frame), IsEmpty());
auto second_frame = frames[1].ExtractFrame();
EXPECT_THAT(second_frame->Id(), Eq(11));
EXPECT_THAT(Payload(second_frame), ElementsAreArray(kDeltaPayload));
EXPECT_THAT(References(second_frame), UnorderedElementsAre(10));
}
} // namespace
} // namespace webrtc
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