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media / parsers / vp9_compressed_header_parser.h [blame]
// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_PARSERS_VP9_COMPRESSED_HEADER_PARSER_H_
#define MEDIA_PARSERS_VP9_COMPRESSED_HEADER_PARSER_H_
#include "media/parsers/vp9_bool_decoder.h"
#include "media/parsers/vp9_parser.h"
namespace media {
class Vp9CompressedHeaderParser {
public:
Vp9CompressedHeaderParser();
Vp9CompressedHeaderParser(const Vp9CompressedHeaderParser&) = delete;
Vp9CompressedHeaderParser& operator=(const Vp9CompressedHeaderParser&) =
delete;
// Parses VP9 compressed header in |stream| with |frame_size| into |fhdr|.
// Will store the deltaProb in the context instead of updating existing
// probabilities. (see 6.3.3 Diff update prob syntax).
// Returns true if no error.
bool ParseNoContext(const uint8_t* stream,
off_t frame_size,
Vp9FrameHeader* fhdr);
private:
bool ParseInternal(const uint8_t* stream,
off_t frame_size,
Vp9FrameHeader* fhdr);
void ReadTxMode(Vp9FrameHeader* fhdr);
uint8_t DecodeTermSubexp();
void DiffUpdateProb(Vp9Prob* prob);
template <int N>
void DiffUpdateProbArray(Vp9Prob (&prob_array)[N]);
void ReadTxModeProbs(Vp9FrameContext* frame_context);
void ReadCoefProbs(Vp9FrameHeader* fhdr);
void ReadSkipProb(Vp9FrameContext* frame_context);
void ReadInterModeProbs(Vp9FrameContext* frame_context);
void ReadInterpFilterProbs(Vp9FrameContext* frame_context);
void ReadIsInterProbs(Vp9FrameContext* frame_context);
void ReadFrameReferenceMode(Vp9FrameHeader* fhdr);
void ReadFrameReferenceModeProbs(Vp9FrameHeader* fhdr);
void ReadYModeProbs(Vp9FrameContext* frame_context);
void ReadPartitionProbs(Vp9FrameContext* frame_context);
void ReadMvProbs(bool allow_high_precision_mv,
Vp9FrameContext* frame_context);
void UpdateMvProb(Vp9Prob* prob);
template <int N>
void UpdateMvProbArray(Vp9Prob (&prob_array)[N]);
// Bool decoder for compressed frame header.
Vp9BoolDecoder reader_;
};
} // namespace media
#endif // MEDIA_PARSERS_VP9_COMPRESSED_HEADER_PARSER_H_