// Copyright 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Note: ported from Chromium commit head: e5a9a62
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#ifndef VP9_COMPRESSED_HEADER_PARSER_H_
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#define VP9_COMPRESSED_HEADER_PARSER_H_
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#include "vp9_bool_decoder.h"
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#include "vp9_parser.h"
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namespace media {
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class Vp9CompressedHeaderParser {
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public:
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Vp9CompressedHeaderParser();
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// Parses VP9 compressed header in |stream| with |frame_size| into |fhdr|.
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// Returns true if no error.
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bool Parse(const uint8_t* stream, off_t frame_size, Vp9FrameHeader* fhdr);
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private:
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void ReadTxMode(Vp9FrameHeader* fhdr);
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uint8_t DecodeTermSubexp();
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void DiffUpdateProb(Vp9Prob* prob);
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template <int N>
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void DiffUpdateProbArray(Vp9Prob (&prob_array)[N]);
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void ReadTxModeProbs(Vp9FrameContext* frame_context);
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void ReadCoefProbs(Vp9FrameHeader* fhdr);
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void ReadSkipProb(Vp9FrameContext* frame_context);
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void ReadInterModeProbs(Vp9FrameContext* frame_context);
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void ReadInterpFilterProbs(Vp9FrameContext* frame_context);
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void ReadIsInterProbs(Vp9FrameContext* frame_context);
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void ReadFrameReferenceMode(Vp9FrameHeader* fhdr);
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void ReadFrameReferenceModeProbs(Vp9FrameHeader* fhdr);
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void ReadYModeProbs(Vp9FrameContext* frame_context);
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void ReadPartitionProbs(Vp9FrameContext* frame_context);
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void ReadMvProbs(bool allow_high_precision_mv,
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Vp9FrameContext* frame_context);
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void UpdateMvProb(Vp9Prob* prob);
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template <int N>
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void UpdateMvProbArray(Vp9Prob (&prob_array)[N]);
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// Bool decoder for compressed frame header.
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Vp9BoolDecoder reader_;
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DISALLOW_COPY_AND_ASSIGN(Vp9CompressedHeaderParser);
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};
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} // namespace media
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#endif // VP9_COMPRESSED_HEADER_PARSER_H_
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