Repo created

TMessagesProj/jni/voip/webrtc/common_video/h265/h265_common.cc

@@ -0,0 +1,67 @@
+/*
+ *  Copyright (c) 2023 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 "common_video/h265/h265_common.h"
+
+#include "common_video/h264/h264_common.h"
+
+namespace webrtc {
+namespace H265 {
+
+constexpr uint8_t kNaluTypeMask = 0x7E;
+
+std::vector<NaluIndex> FindNaluIndices(const uint8_t* buffer,
+                                       size_t buffer_size) {
+  std::vector<H264::NaluIndex> indices =
+      H264::FindNaluIndices(buffer, buffer_size);
+  std::vector<NaluIndex> results;
+  for (auto& index : indices) {
+    results.push_back(
+        {index.start_offset, index.payload_start_offset, index.payload_size});
+  }
+  return results;
+}
+
+NaluType ParseNaluType(uint8_t data) {
+  return static_cast<NaluType>((data & kNaluTypeMask) >> 1);
+}
+
+std::vector<uint8_t> ParseRbsp(const uint8_t* data, size_t length) {
+  return H264::ParseRbsp(data, length);
+}
+
+void WriteRbsp(const uint8_t* bytes, size_t length, rtc::Buffer* destination) {
+  H264::WriteRbsp(bytes, length, destination);
+}
+
+uint32_t Log2Ceiling(uint32_t value) {
+  // When n == 0, we want the function to return -1.
+  // When n == 0, (n - 1) will underflow to 0xFFFFFFFF, which is
+  // why the statement below starts with (n ? 32 : -1).
+  return (value ? 32 : -1) - WebRtcVideo_CountLeadingZeros32(value - 1);
+}
+
+uint32_t Log2(uint32_t value) {
+  uint32_t result = 0;
+  // If value is not a power of two an additional bit is required
+  // to account for the ceil() of log2() below.
+  if ((value & (value - 1)) != 0) {
+    ++result;
+  }
+  while (value > 0) {
+    value >>= 1;
+    ++result;
+  }
+
+  return result;
+}
+
+}  // namespace H265
+}  // namespace webrtc