H264POC: Allow gaps in frame_num.

media/video/h264_poc_unittest.cc

Index: media/video/h264_poc_unittest.cc
diff --git a/media/video/h264_poc_unittest.cc b/media/video/h264_poc_unittest.cc
index 79177db24a91db2b32be5a27381c2fb7b1e20587..9df67429fd9338213a9c8f084af2393c3a07fd65 100644
--- a/media/video/h264_poc_unittest.cc
+++ b/media/video/h264_poc_unittest.cc
@@ -52,11 +52,13 @@ TEST_F(H264POCTest, PicOrderCntType0) {
 
   // Initial IDR with POC 0.
   slice_hdr_.idr_pic_flag = true;
+  slice_hdr_.frame_num = 0;
   ASSERT_TRUE(ComputePOC());
   ASSERT_EQ(0, poc_);
 
   // Ref frame with POC lsb 8.
   slice_hdr_.idr_pic_flag = false;
+  slice_hdr_.frame_num = 1;
   slice_hdr_.pic_order_cnt_lsb = 8;
   ASSERT_TRUE(ComputePOC());
   ASSERT_EQ(8, poc_);
@@ -64,12 +66,14 @@ TEST_F(H264POCTest, PicOrderCntType0) {
   // Ref frame with POC lsb 0. This should be detected as wrapping, as the
   // (negative) gap is at least half the maximum.
   slice_hdr_.pic_order_cnt_lsb = 0;
+  slice_hdr_.frame_num = 2;
   ASSERT_TRUE(ComputePOC());
   ASSERT_EQ(16, poc_);
 
   // Ref frame with POC lsb 9. This should be detected as negative wrapping,
   // as the (positive) gap is more than half the maximum.
   slice_hdr_.pic_order_cnt_lsb = 9;
+  slice_hdr_.frame_num = 3;
   ASSERT_TRUE(ComputePOC());
   ASSERT_EQ(9, poc_);
 }
@@ -80,30 +84,36 @@ TEST_F(H264POCTest, PicOrderCntType0_WithMMCO5) {
 
   // Initial IDR with POC 0.
   slice_hdr_.idr_pic_flag = true;
+  slice_hdr_.frame_num = 0;
   ASSERT_TRUE(ComputePOC());
   ASSERT_EQ(0, poc_);
 
   // Skip ahead.
   slice_hdr_.idr_pic_flag = false;
+  slice_hdr_.frame_num = 1;
   slice_hdr_.pic_order_cnt_lsb = 8;
   ASSERT_TRUE(ComputePOC());
   ASSERT_EQ(8, poc_);
 
+  slice_hdr_.frame_num = 2;
   slice_hdr_.pic_order_cnt_lsb = 0;
   ASSERT_TRUE(ComputePOC());
   ASSERT_EQ(16, poc_);
 
+  slice_hdr_.frame_num = 3;
   slice_hdr_.pic_order_cnt_lsb = 8;
   ASSERT_TRUE(ComputePOC());
   ASSERT_EQ(24, poc_);
 
-  SetMMCO5();
+  slice_hdr_.frame_num = 4;
   slice_hdr_.pic_order_cnt_lsb = 0;
+  SetMMCO5();
   ASSERT_TRUE(ComputePOC());
   ASSERT_EQ(32, poc_);
 
   // Due to the MMCO5 above, this is relative to 0, but also detected as
   // positive wrapping.
+  slice_hdr_.frame_num = 5;
   slice_hdr_.pic_order_cnt_lsb = 8;
   ASSERT_TRUE(ComputePOC());
   ASSERT_EQ(24, poc_);