Add interface class for bitstream parser.
Bug: webrtc:10439
Change-Id: I0decbbf4aa21a96db50f340f200ccf8adc9e8b53
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/128760
Commit-Queue: Kári Helgason <kthelgason@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27237}diff --git a/api/video_codecs/bitstream_parser.h b/api/video_codecs/bitstream_parser.h
new file mode 100644
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--- /dev/null
+++ b/api/video_codecs/bitstream_parser.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2019 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 API_VIDEO_CODECS_BITSTREAM_PARSER_H_
+#define API_VIDEO_CODECS_BITSTREAM_PARSER_H_
+#include <stddef.h>
+#include <stdint.h>
+
+#include "api/array_view.h"
+
+namespace webrtc {
+
+// This class is an interface for bitstream parsers.
+class BitstreamParser {
+ public:
+ virtual ~BitstreamParser() = default;
+
+ // Parse an additional chunk of the bitstream.
+ virtual void ParseBitstream(rtc::ArrayView<const uint8_t> bitstream) = 0;
+
+ // Get the last extracted QP value from the parsed bitstream. If no QP
+ // value could be parsed, returns absl::nullopt.
+ virtual absl::optional<int> GetLastSliceQp() const = 0;
+};
+
+} // namespace webrtc
+
+#endif // API_VIDEO_CODECS_BITSTREAM_PARSER_H_