Reland of Add a flags field to video timing extension.

webrtc/modules/rtp_rtcp/source/rtp_packet_unittest.cc

Index: webrtc/modules/rtp_rtcp/source/rtp_packet_unittest.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtp_packet_unittest.cc b/webrtc/modules/rtp_rtcp/source/rtp_packet_unittest.cc
index 1075d9ea352bbdd487eb808f328f56865e2d4a1a..776db53385e30a04c49cbb1d03a35b5fed1d5ed3 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_packet_unittest.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtp_packet_unittest.cc
@@ -32,6 +32,7 @@ constexpr uint8_t kTransmissionOffsetExtensionId = 1;
 constexpr uint8_t kAudioLevelExtensionId = 9;
 constexpr uint8_t kRtpStreamIdExtensionId = 0xa;
 constexpr uint8_t kRtpMidExtensionId = 0xb;
+constexpr uint8_t kVideoTimingExtensionId = 0xc;
 constexpr int32_t kTimeOffset = 0x56ce;
 constexpr bool kVoiceActive = true;
 constexpr uint8_t kAudioLevel = 0x5a;
@@ -97,8 +98,19 @@ constexpr uint8_t kPacketWithInvalidExtension[] = {
     (kTransmissionOffsetExtensionId << 4) | 6,  // (6+1)-byte extension, but
            'e',  'x',  't',                     // Transmission Offset
      'd',  'a',  't',  'a',                     // expected to be 3-bytes.
-     'p',  'a',  'y',  'l',  'o',  'a',  'd'
-};
+     'p',  'a',  'y',  'l',  'o',  'a',  'd'};
+
+constexpr uint8_t kPacketWithLegacyTimingExtension[] = {
+    0x90, kPayloadType, kSeqNumFirstByte, kSeqNumSecondByte,
+    0x65, 0x43, 0x12, 0x78,  // kTimestamp.
+    0x12, 0x34, 0x56, 0x78,  // kSSrc.
+    0xbe, 0xde, 0x00, 0x04,    // Extension block of size 4 x 32bit words.
+    (kVideoTimingExtensionId << 4)
+      | VideoTimingExtension::kValueSizeBytes - 2,  // Old format without flags.
+          0x00, 0x01, 0x00,
+    0x02, 0x00, 0x03, 0x00,
+    0x04, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00};
 // clang-format on
 }  // namespace
 
@@ -498,4 +510,57 @@ TEST(RtpPacketTest, RawExtensionFunctionsAcceptZeroIdAndReturnFalse) {
   EXPECT_THAT(packet.AllocateRawExtension(kInvalidId, 3), IsEmpty());
 }
 
+TEST(RtpPacketTest, CreateAndParseTimingFrameExtension) {
+  // Create a packet with video frame timing extension populated.
+  RtpPacketToSend::ExtensionManager send_extensions;
+  send_extensions.Register(kRtpExtensionVideoTiming, kVideoTimingExtensionId);
+  RtpPacketToSend send_packet(&send_extensions);
+  send_packet.SetPayloadType(kPayloadType);
+  send_packet.SetSequenceNumber(kSeqNum);
+  send_packet.SetTimestamp(kTimestamp);
+  send_packet.SetSsrc(kSsrc);
+
+  VideoSendTiming timing;
+  timing.encode_start_delta_ms = 1;
+  timing.encode_finish_delta_ms = 2;
+  timing.packetization_finish_delta_ms = 3;
+  timing.pacer_exit_delta_ms = 4;
+  timing.flags =
+      TimingFrameFlags::kTriggeredByTimer + TimingFrameFlags::kTriggeredBySize;
+
+  send_packet.SetExtension<VideoTimingExtension>(timing);
+
+  // Serialize the packet and then parse it again.
+  RtpPacketReceived::ExtensionManager extensions;
+  extensions.Register<VideoTimingExtension>(kVideoTimingExtensionId);
+  RtpPacketReceived receive_packet(&extensions);
+  EXPECT_TRUE(receive_packet.Parse(send_packet.Buffer()));
+
+  VideoSendTiming receivied_timing;
+  EXPECT_TRUE(
+      receive_packet.GetExtension<VideoTimingExtension>(&receivied_timing));
+
+  // Only check first and last timestamp (covered by other tests) plus flags.
+  EXPECT_EQ(receivied_timing.encode_start_delta_ms,
+            timing.encode_start_delta_ms);
+  EXPECT_EQ(receivied_timing.pacer_exit_delta_ms, timing.pacer_exit_delta_ms);
+  EXPECT_EQ(receivied_timing.flags, timing.flags);
+}
+
+TEST(RtpPacketTest, ParseLegacyTimingFrameExtension) {
+  // Parse the modified packet.
+  RtpPacketReceived::ExtensionManager extensions;
+  extensions.Register<VideoTimingExtension>(kVideoTimingExtensionId);
+  RtpPacketReceived packet(&extensions);
+  EXPECT_TRUE(packet.Parse(kPacketWithLegacyTimingExtension,
+                           sizeof(kPacketWithLegacyTimingExtension)));
+  VideoSendTiming receivied_timing;
+  EXPECT_TRUE(packet.GetExtension<VideoTimingExtension>(&receivied_timing));
+
+  // Check first and last timestamp are still OK. Flags should now be 0.
+  EXPECT_EQ(receivied_timing.encode_start_delta_ms, 1);
+  EXPECT_EQ(receivied_timing.pacer_exit_delta_ms, 4);
+  EXPECT_EQ(receivied_timing.flags, 0);
+}
+
 }  // namespace webrtc