Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 67 insertions, 0 deletions

diff --git a/third_party/libwebrtc/common_video/h265/h265_pps_parser.h b/third_party/libwebrtc/common_video/h265/h265_pps_parser.h
new file mode 100644
index 0000000000..625869d8d5
--- /dev/null
+++ b/third_party/libwebrtc/common_video/h265/h265_pps_parser.h
@@ -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.
+ */
+
+#ifndef COMMON_VIDEO_H265_H265_PPS_PARSER_H_
+#define COMMON_VIDEO_H265_H265_PPS_PARSER_H_
+
+#include "absl/types/optional.h"
+#include "api/array_view.h"
+#include "common_video/h265/h265_sps_parser.h"
+#include "rtc_base/bitstream_reader.h"
+
+namespace webrtc {
+
+// A class for parsing out picture parameter set (PPS) data from a H265 NALU.
+class H265PpsParser {
+ public:
+  // The parsed state of the PPS. Only some select values are stored.
+  // Add more as they are actually needed.
+  struct PpsState {
+    PpsState() = default;
+
+    bool dependent_slice_segments_enabled_flag = false;
+    bool cabac_init_present_flag = false;
+    bool output_flag_present_flag = false;
+    uint32_t num_extra_slice_header_bits = 0;
+    uint32_t num_ref_idx_l0_default_active_minus1 = 0;
+    uint32_t num_ref_idx_l1_default_active_minus1 = 0;
+    int init_qp_minus26 = 0;
+    bool weighted_pred_flag = false;
+    bool weighted_bipred_flag = false;
+    bool lists_modification_present_flag = false;
+    uint32_t pps_id = 0;
+    uint32_t sps_id = 0;
+    int qp_bd_offset_y = 0;
+  };
+
+  // Unpack RBSP and parse PPS state from the supplied buffer.
+  static absl::optional<PpsState> ParsePps(const uint8_t* data,
+                                           size_t length,
+                                           const H265SpsParser::SpsState* sps);
+
+  static bool ParsePpsIds(const uint8_t* data,
+                          size_t length,
+                          uint32_t* pps_id,
+                          uint32_t* sps_id);
+
+ protected:
+  // Parse the PPS state, for a bit buffer where RBSP decoding has already been
+  // performed.
+  static absl::optional<PpsState> ParseInternal(
+      rtc::ArrayView<const uint8_t> buffer,
+      const H265SpsParser::SpsState* sps);
+  static bool ParsePpsIdsInternal(BitstreamReader& reader,
+                                  uint32_t& pps_id,
+                                  uint32_t& sps_id);
+};
+
+}  // namespace webrtc
+
+#endif  // COMMON_VIDEO_H265_H265_PPS_PARSER_H_