mirror of https://bitbucket.org/ausocean/av.git
47 lines
1.3 KiB
Go
47 lines
1.3 KiB
Go
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/*
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DESCRIPTION
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cavlc.go provides utilities for context-adaptive variable-length coding
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for the parsing of H.264 syntax structure fields.
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AUTHORS
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Saxon A. Nelson-Milton <saxon@ausocean.org>
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LICENSE
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Copyright (C) 2019 the Australian Ocean Lab (AusOcean).
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It is free software: you can redistribute it and/or modify them
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under the terms of the GNU General Public License as published by the
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Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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It is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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in gpl.txt. If not, see http://www.gnu.org/licenses.
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*/
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package h264dec
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import (
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"fmt"
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"bitbucket.org/ausocean/av/codec/h264/h264dec/bits"
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)
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// parseLevelPrefix parses the level_prefix variable as specified by the process
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// outlined in section 9.2.2.1 in the specifications.
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func parseLevelPrefix(br *bits.BitReader) (int, error) {
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zeros := -1
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for b := 0; b != 1; zeros++ {
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_b, err := br.ReadBits(1)
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if err != nil {
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return -1, fmt.Errorf("could not read bit, failed with error: %v", err)
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}
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b = int(_b)
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}
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return zeros, nil
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}
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