H264 bitstream parser.

webrtc/modules/rtp_rtcp/source/h264_bitstream_parser_unittest.cc

+/*
+ *  Copyright (c) 2015 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 "webrtc/modules/rtp_rtcp/source/h264_bitstream_parser.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace webrtc {
+
+// SPS/PPS part of below chunk.
+uint8_t kH264SpsPps[] = {0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x20, 0xda,
+                         0x01, 0x40, 0x16, 0xe8, 0x06, 0xd0, 0xa1, 0x35, 0x00,
+                         0x00, 0x00, 0x01, 0x68, 0xce, 0x06, 0xe2};
+
+// Contains enough of the image slice to contain slice QP.
+uint8_t kH264BitstreamChunk[] = {
+    0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x20, 0xda, 0x01, 0x40, 0x16,
+    0xe8, 0x06, 0xd0, 0xa1, 0x35, 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x06,
+    0xe2, 0x00, 0x00, 0x00, 0x01, 0x65, 0xb8, 0x40, 0xf0, 0x8c, 0x03, 0xf2,
+    0x75, 0x67, 0xad, 0x41, 0x64, 0x24, 0x0e, 0xa0, 0xb2, 0x12, 0x1e, 0xf8,
+};
+
+// Contains enough of the image slice to contain slice QP.
+uint8_t kH264BitstreamNextImageSliceChunk[] = {
+    0x00, 0x00, 0x00, 0x01, 0x41, 0xe2, 0x01, 0x16, 0x0e, 0x3e, 0x2b, 0x86,
+};
+
+TEST(H264BitstreamParserTest, ReportsNoQpWithoutParsedSlices) {
+  H264BitstreamParser h264_parser;
+  int qp;
+  EXPECT_FALSE(h264_parser.GetLastSliceQp(&qp));
+}
+
+TEST(H264BitstreamParserTest, ReportsNoQpWithOnlyParsedPpsAndSpsSlices) {
+  H264BitstreamParser h264_parser;
+  h264_parser.ParseBitstream(kH264SpsPps, sizeof(kH264SpsPps));
+  int qp;
+  EXPECT_FALSE(h264_parser.GetLastSliceQp(&qp));
+}
+
+TEST(H264BitstreamParserTest, ReportsLastSliceQpForImageSlices) {
+  H264BitstreamParser h264_parser;
+  h264_parser.ParseBitstream(kH264BitstreamChunk, sizeof(kH264BitstreamChunk));
+  int qp;
+  ASSERT_TRUE(h264_parser.GetLastSliceQp(&qp));
+  EXPECT_EQ(35, qp);
+
+  // Parse an additional image slice.
+  h264_parser.ParseBitstream(kH264BitstreamNextImageSliceChunk,
+                             sizeof(kH264BitstreamNextImageSliceChunk));
+  ASSERT_TRUE(h264_parser.GetLastSliceQp(&qp));
+  EXPECT_EQ(37, qp);
+}
+
+}  // namespace webrtc