diff options
Diffstat (limited to '')
-rw-r--r-- | third_party/libwebrtc/modules/video_coding/utility/vp8_header_parser.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/video_coding/utility/vp8_header_parser.h b/third_party/libwebrtc/modules/video_coding/utility/vp8_header_parser.h new file mode 100644 index 0000000000..dbad999dc8 --- /dev/null +++ b/third_party/libwebrtc/modules/video_coding/utility/vp8_header_parser.h @@ -0,0 +1,40 @@ +/* + * Copyright (c) 2015 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 MODULES_VIDEO_CODING_UTILITY_VP8_HEADER_PARSER_H_ +#define MODULES_VIDEO_CODING_UTILITY_VP8_HEADER_PARSER_H_ + +#include <stdint.h> +#include <stdio.h> + +namespace webrtc { + +namespace vp8 { + +typedef struct VP8BitReader VP8BitReader; +struct VP8BitReader { + // Boolean decoder. + uint32_t value_; // Current value (2 bytes). + uint32_t range_; // Current range (always in [128..255] interval). + int bits_; // Number of bits shifted out of value, at most 7. + // Read buffer. + const uint8_t* buf_; // Next byte to be read. + const uint8_t* buf_end_; // End of read buffer. +}; + +// Gets the QP, QP range: [0, 127]. +// Returns true on success, false otherwise. +bool GetQp(const uint8_t* buf, size_t length, int* qp); + +} // namespace vp8 + +} // namespace webrtc + +#endif // MODULES_VIDEO_CODING_UTILITY_VP8_HEADER_PARSER_H_ |