Index: webrtc/modules/video_coding/utility/vp9_uncompressed_header_parser.h |
diff --git a/webrtc/modules/video_coding/utility/vp9_uncompressed_header_parser.h b/webrtc/modules/video_coding/utility/vp9_uncompressed_header_parser.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..ef6f268e51c487db28511cee277349ecb9b5d9e5 |
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+++ b/webrtc/modules/video_coding/utility/vp9_uncompressed_header_parser.h |
@@ -0,0 +1,61 @@ |
+/* |
+ * Copyright (c) 2017 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 WEBRTC_MODULES_VIDEO_CODING_UTILITY_VP9_UNCOMPRESSED_HEADER_PARSER_H_ |
+#define WEBRTC_MODULES_VIDEO_CODING_UTILITY_VP9_UNCOMPRESSED_HEADER_PARSER_H_ |
+ |
+#include <stddef.h> |
+#include <stdint.h> |
+ |
+#include "webrtc/base/bitbuffer.h" |
+#include "webrtc/base/logging.h" |
+ |
+namespace webrtc { |
+ |
+namespace vp9 { |
+ |
+class VP9BitReader : public ::rtc::BitBuffer { |
+ public: |
+ VP9BitReader(const uint8_t* buffer, size_t length_) |
+ : BitBuffer(buffer, length_) {} |
+ |
+ uint32_t GetBit() { |
+ uint32_t bit = 0; |
+ if (ReadBits(&bit, 1)) |
+ return bit; |
+ |
+ LOG(LS_WARNING) << "Failed to get bit. Reached EOF."; |
+ return 0; |
+ } |
+ |
+ uint32_t GetValue(int bits) { |
+ uint32_t value = 0; |
+ if (ReadBits(&value, bits)) |
+ return value; |
+ |
+ LOG(LS_WARNING) << "Failed to get bit. Reached EOF."; |
+ return 0; |
+ } |
+ |
+ int32_t GetSignedValue(int bits) { |
+ const int32_t value = static_cast<int>(GetValue(bits)); |
+ return GetBit() ? -value : value; |
+ } |
+}; |
+ |
+// Gets the QP, QP range: [0, 255]. |
+// Returns true on success, false otherwise. |
+bool GetQp(const uint8_t* buf, size_t length, int* qp); |
+ |
+} // namespace vp9 |
+ |
+} // namespace webrtc |
+ |
+#endif // WEBRTC_MODULES_VIDEO_CODING_UTILITY_VP9_UNCOMPRESSED_HEADER_PARSER_H_ |