1 /* 2 * Copyright (c) 2019 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef API_VIDEO_CODECS_BITSTREAM_PARSER_H_ 12 #define API_VIDEO_CODECS_BITSTREAM_PARSER_H_ 13 14 #include <stddef.h> 15 #include <stdint.h> 16 17 #include "absl/types/optional.h" 18 #include "api/array_view.h" 19 20 namespace webrtc { 21 22 // This class is an interface for bitstream parsers. 23 class BitstreamParser { 24 public: 25 virtual ~BitstreamParser() = default; 26 27 // Parse an additional chunk of the bitstream. 28 virtual void ParseBitstream(rtc::ArrayView<const uint8_t> bitstream) = 0; 29 30 // Get the last extracted QP value from the parsed bitstream. If no QP 31 // value could be parsed, returns absl::nullopt. 32 virtual absl::optional<int> GetLastSliceQp() const = 0; 33 }; 34 35 } // namespace webrtc 36 37 #endif // API_VIDEO_CODECS_BITSTREAM_PARSER_H_ 38