1 files changed, 55 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/video_coding/utility/qp_parser.cc b/third_party/libwebrtc/modules/video_coding/utility/qp_parser.cc
new file mode 100644
index 0000000000..3b9aaa377e
--- /dev/null
+++ b/third_party/libwebrtc/modules/video_coding/utility/qp_parser.cc
@@ -0,0 +1,55 @@
+/*
+ *  Copyright (c) 2021 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 "modules/video_coding/utility/qp_parser.h"
+
+#include "modules/video_coding/utility/vp8_header_parser.h"
+#include "modules/video_coding/utility/vp9_uncompressed_header_parser.h"
+
+namespace webrtc {
+
+absl::optional<uint32_t> QpParser::Parse(VideoCodecType codec_type,
+                                         size_t spatial_idx,
+                                         const uint8_t* frame_data,
+                                         size_t frame_size) {
+  if (frame_data == nullptr || frame_size == 0 ||
+      spatial_idx >= kMaxSimulcastStreams) {
+    return absl::nullopt;
+  }
+
+  if (codec_type == kVideoCodecVP8) {
+    int qp = -1;
+    if (vp8::GetQp(frame_data, frame_size, &qp)) {
+      return qp;
+    }
+  } else if (codec_type == kVideoCodecVP9) {
+    int qp = -1;
+    if (vp9::GetQp(frame_data, frame_size, &qp)) {
+      return qp;
+    }
+  } else if (codec_type == kVideoCodecH264) {
+    return h264_parsers_[spatial_idx].Parse(frame_data, frame_size);
+  } else if (codec_type == kVideoCodecH265) {
+    // TODO(bugs.webrtc.org/13485)
+  }
+
+  return absl::nullopt;
+}
+
+absl::optional<uint32_t> QpParser::H264QpParser::Parse(
+    const uint8_t* frame_data,
+    size_t frame_size) {
+  MutexLock lock(&mutex_);
+  bitstream_parser_.ParseBitstream(
+      rtc::ArrayView<const uint8_t>(frame_data, frame_size));
+  return bitstream_parser_.GetLastSliceQp();
+}
+
+}  // namespace webrtc