Make VideoFrameType an enum class, and move to separate file and target

Bug: webrtc:5876, webrtc:6883
Change-Id: I1435cfa9e8e54c4ba2978261048ff3fbb993ce0e
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/126225
Commit-Queue: Niels Moller <nisse@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27239}
diff --git a/modules/video_coding/decoding_state_unittest.cc b/modules/video_coding/decoding_state_unittest.cc
index 6aeeb64..a578900 100644
--- a/modules/video_coding/decoding_state_unittest.cc
+++ b/modules/video_coding/decoding_state_unittest.cc
@@ -38,7 +38,7 @@
   packet.video_header.is_first_packet_in_frame = true;
   packet.timestamp = 1;
   packet.seqNum = 0xffff;
-  packet.frameType = kVideoFrameDelta;
+  packet.frameType = VideoFrameType::kVideoFrameDelta;
   packet.video_header.codec = kVideoCodecVP8;
   auto& vp8_header =
       packet.video_header.video_type_header.emplace<RTPVideoHeaderVP8>();
@@ -50,12 +50,12 @@
   // Always start with a key frame.
   dec_state.Reset();
   EXPECT_FALSE(dec_state.ContinuousFrame(&frame));
-  packet.frameType = kVideoFrameKey;
+  packet.frameType = VideoFrameType::kVideoFrameKey;
   EXPECT_LE(0, frame_key.InsertPacket(packet, 0, frame_data));
   EXPECT_TRUE(dec_state.ContinuousFrame(&frame_key));
   dec_state.SetState(&frame);
   frame.Reset();
-  packet.frameType = kVideoFrameDelta;
+  packet.frameType = VideoFrameType::kVideoFrameDelta;
   // Use pictureId
   packet.video_header.is_first_packet_in_frame = false;
   vp8_header.pictureId = 0x0002;
@@ -171,7 +171,7 @@
   VCMPacket packet;
   packet.timestamp = 1;
   packet.seqNum = 1;
-  packet.frameType = kVideoFrameDelta;
+  packet.frameType = VideoFrameType::kVideoFrameDelta;
   FrameData frame_data;
   frame_data.rtt_ms = 0;
   frame_data.rolling_average_packets_per_frame = -1;
@@ -186,14 +186,14 @@
   // Now insert empty packet belonging to the same frame.
   packet.timestamp = 1;
   packet.seqNum = 2;
-  packet.frameType = kEmptyFrame;
+  packet.frameType = VideoFrameType::kEmptyFrame;
   packet.sizeBytes = 0;
   dec_state.UpdateOldPacket(&packet);
   EXPECT_EQ(dec_state.sequence_num(), 2);
   // Now insert delta packet belonging to the same frame.
   packet.timestamp = 1;
   packet.seqNum = 3;
-  packet.frameType = kVideoFrameDelta;
+  packet.frameType = VideoFrameType::kVideoFrameDelta;
   packet.sizeBytes = 1400;
   dec_state.UpdateOldPacket(&packet);
   EXPECT_EQ(dec_state.sequence_num(), 3);
@@ -201,7 +201,7 @@
   // sequence number.
   packet.timestamp = 0;
   packet.seqNum = 4;
-  packet.frameType = kEmptyFrame;
+  packet.frameType = VideoFrameType::kEmptyFrame;
   packet.sizeBytes = 0;
   dec_state.UpdateOldPacket(&packet);
   EXPECT_EQ(dec_state.sequence_num(), 3);
@@ -215,7 +215,7 @@
   // tl0PicIdx 0, temporal id 0.
   VCMFrameBuffer frame;
   VCMPacket packet;
-  packet.frameType = kVideoFrameDelta;
+  packet.frameType = VideoFrameType::kVideoFrameDelta;
   packet.video_header.codec = kVideoCodecVP8;
   packet.timestamp = 0;
   packet.seqNum = 0;
@@ -266,7 +266,7 @@
   // Insert key frame - should update sync value.
   // A key frame is always a base layer.
   frame.Reset();
-  packet.frameType = kVideoFrameKey;
+  packet.frameType = VideoFrameType::kVideoFrameKey;
   packet.video_header.is_first_packet_in_frame = true;
   packet.timestamp = 5;
   packet.seqNum = 5;
@@ -280,7 +280,7 @@
   // After sync, a continuous PictureId is required
   // (continuous base layer is not enough )
   frame.Reset();
-  packet.frameType = kVideoFrameDelta;
+  packet.frameType = VideoFrameType::kVideoFrameDelta;
   packet.timestamp = 6;
   packet.seqNum = 6;
   vp8_header.tl0PicIdx = 3;
@@ -290,7 +290,7 @@
   EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
   EXPECT_TRUE(dec_state.full_sync());
   frame.Reset();
-  packet.frameType = kVideoFrameDelta;
+  packet.frameType = VideoFrameType::kVideoFrameDelta;
   packet.video_header.is_first_packet_in_frame = true;
   packet.timestamp = 8;
   packet.seqNum = 8;
@@ -305,7 +305,7 @@
 
   // Insert a non-ref frame - should update sync value.
   frame.Reset();
-  packet.frameType = kVideoFrameDelta;
+  packet.frameType = VideoFrameType::kVideoFrameDelta;
   packet.video_header.is_first_packet_in_frame = true;
   packet.timestamp = 9;
   packet.seqNum = 9;
@@ -325,7 +325,7 @@
   // Base layer.
   frame.Reset();
   dec_state.Reset();
-  packet.frameType = kVideoFrameDelta;
+  packet.frameType = VideoFrameType::kVideoFrameDelta;
   packet.video_header.is_first_packet_in_frame = true;
   packet.markerBit = 1;
   packet.timestamp = 0;
@@ -339,7 +339,7 @@
   EXPECT_TRUE(dec_state.full_sync());
   // Layer 2 - 2 packets (insert one, lose one).
   frame.Reset();
-  packet.frameType = kVideoFrameDelta;
+  packet.frameType = VideoFrameType::kVideoFrameDelta;
   packet.video_header.is_first_packet_in_frame = true;
   packet.markerBit = 0;
   packet.timestamp = 1;
@@ -352,7 +352,7 @@
   EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
   // Layer 1
   frame.Reset();
-  packet.frameType = kVideoFrameDelta;
+  packet.frameType = VideoFrameType::kVideoFrameDelta;
   packet.video_header.is_first_packet_in_frame = true;
   packet.markerBit = 1;
   packet.timestamp = 2;
@@ -371,7 +371,7 @@
   VCMFrameBuffer frame;
   VCMPacket packet;
   frame.Reset();
-  packet.frameType = kVideoFrameKey;
+  packet.frameType = VideoFrameType::kVideoFrameKey;
   packet.video_header.codec = kVideoCodecVP8;
   packet.timestamp = 0;
   packet.seqNum = 0;
@@ -390,7 +390,7 @@
   // Continuous sequence number but discontinuous picture id. This implies a
   // a loss and we have to fall back to only decoding the base layer.
   frame.Reset();
-  packet.frameType = kVideoFrameDelta;
+  packet.frameType = VideoFrameType::kVideoFrameDelta;
   packet.timestamp += 3000;
   ++packet.seqNum;
   vp8_header.temporalIdx = 1;
@@ -426,7 +426,7 @@
   VCMDecodingState dec_state;
   VCMFrameBuffer frame;
   VCMPacket packet;
-  packet.frameType = kVideoFrameDelta;
+  packet.frameType = VideoFrameType::kVideoFrameDelta;
   packet.video_header.codec = kVideoCodecVP8;
   packet.timestamp = 0;
   packet.seqNum = 0;
@@ -479,7 +479,7 @@
   frame_data.rolling_average_packets_per_frame = -1;
 
   // Key frame as first frame
-  packet.frameType = kVideoFrameKey;
+  packet.frameType = VideoFrameType::kVideoFrameKey;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, frame_data));
   EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
   dec_state.SetState(&frame);
@@ -493,7 +493,7 @@
 
   // Ref to 11, continuous
   frame.Reset();
-  packet.frameType = kVideoFrameDelta;
+  packet.frameType = VideoFrameType::kVideoFrameDelta;
   vp9_hdr.picture_id = 12;
   vp9_hdr.num_ref_pics = 1;
   vp9_hdr.pid_diff[0] = 1;
@@ -523,14 +523,14 @@
   frame_data.rolling_average_packets_per_frame = -1;
 
   // Key frame as first frame
-  packet.frameType = kVideoFrameKey;
+  packet.frameType = VideoFrameType::kVideoFrameKey;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, frame_data));
   EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
   dec_state.SetState(&frame);
 
   // Ref to 10, continuous
   frame.Reset();
-  packet.frameType = kVideoFrameDelta;
+  packet.frameType = VideoFrameType::kVideoFrameDelta;
   vp9_hdr.picture_id = 15;
   vp9_hdr.num_ref_pics = 1;
   vp9_hdr.pid_diff[0] = 5;
@@ -579,23 +579,23 @@
   frame_data.rolling_average_packets_per_frame = -1;
 
   // Key frame as first frame
-  packet.frameType = kVideoFrameKey;
+  packet.frameType = VideoFrameType::kVideoFrameKey;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, frame_data));
   EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
 
   // Delta frame as first frame
   frame.Reset();
-  packet.frameType = kVideoFrameDelta;
+  packet.frameType = VideoFrameType::kVideoFrameDelta;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, frame_data));
   EXPECT_FALSE(dec_state.ContinuousFrame(&frame));
 
   // Key frame then delta frame
   frame.Reset();
-  packet.frameType = kVideoFrameKey;
+  packet.frameType = VideoFrameType::kVideoFrameKey;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, frame_data));
   dec_state.SetState(&frame);
   frame.Reset();
-  packet.frameType = kVideoFrameDelta;
+  packet.frameType = VideoFrameType::kVideoFrameDelta;
   vp9_hdr.num_ref_pics = 1;
   vp9_hdr.picture_id = 15;
   vp9_hdr.pid_diff[0] = 5;
@@ -639,7 +639,7 @@
 
   // Key Frame, continuous
   frame.Reset();
-  packet.frameType = kVideoFrameKey;
+  packet.frameType = VideoFrameType::kVideoFrameKey;
   vp9_hdr.picture_id = VCMDecodingState::kFrameDecodedLength - 2;
   vp9_hdr.num_ref_pics = 0;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, frame_data));
@@ -648,7 +648,7 @@
 
   // Frame at last index, ref to KF, continuous
   frame.Reset();
-  packet.frameType = kVideoFrameDelta;
+  packet.frameType = VideoFrameType::kVideoFrameDelta;
   vp9_hdr.picture_id = VCMDecodingState::kFrameDecodedLength - 1;
   vp9_hdr.num_ref_pics = 1;
   vp9_hdr.pid_diff[0] = 1;
@@ -684,7 +684,7 @@
 
   // Key frame, continuous
   frame.Reset();
-  packet.frameType = kVideoFrameKey;
+  packet.frameType = VideoFrameType::kVideoFrameKey;
   vp9_hdr.picture_id = 25;
   vp9_hdr.num_ref_pics = 0;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, frame_data));
@@ -693,7 +693,7 @@
 
   // Ref to KF, continuous
   frame.Reset();
-  packet.frameType = kVideoFrameDelta;
+  packet.frameType = VideoFrameType::kVideoFrameDelta;
   vp9_hdr.picture_id = 26;
   vp9_hdr.num_ref_pics = 1;
   vp9_hdr.pid_diff[0] = 1;