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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_FORMATS_MP4_HEVC_H_
#define MEDIA_FORMATS_MP4_HEVC_H_
#include <vector>
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "media/base/media_export.h"
#include "media/formats/mp4/bitstream_converter.h"
#include "media/formats/mp4/box_definitions.h"
namespace media {
struct SubsampleEntry;
namespace mp4 {
struct MEDIA_EXPORT HEVCDecoderConfigurationRecord : Box {
DECLARE_BOX_METHODS(HEVCDecoderConfigurationRecord);
// Parses HEVCDecoderConfigurationRecord data encoded in |data|.
// Note: This method is intended to parse data outside the MP4StreamParser
// context and therefore the box header is not expected to be present
// in |data|.
// Returns true if |data| was successfully parsed.
bool Parse(const uint8* data, int data_size);
uint8 configurationVersion;
uint8 general_profile_space;
uint8 general_tier_flag;
uint8 general_profile_idc;
uint32 general_profile_compatibility_flags;
uint64 general_constraint_indicator_flags;
uint8 general_level_idc;
uint16 min_spatial_segmentation_idc;
uint8 parallelismType;
uint8 chromaFormat;
uint8 bitDepthLumaMinus8;
uint8 bitDepthChromaMinus8;
uint16 avgFrameRate;
uint8 constantFrameRate;
uint8 numTemporalLayers;
uint8 temporalIdNested;
uint8 lengthSizeMinusOne;
uint8 numOfArrays;
typedef std::vector<uint8> HVCCNALUnit;
struct HVCCNALArray {
HVCCNALArray();
~HVCCNALArray();
uint8 first_byte;
std::vector<HVCCNALUnit> units;
};
std::vector<HVCCNALArray> arrays;
private:
bool ParseInternal(BufferReader* reader,
const scoped_refptr<MediaLog>& media_log);
};
class MEDIA_EXPORT HEVC {
public:
static bool ConvertConfigToAnnexB(
const HEVCDecoderConfigurationRecord& hevc_config,
std::vector<uint8>* buffer);
static bool InsertParamSetsAnnexB(
const HEVCDecoderConfigurationRecord& hevc_config,
std::vector<uint8>* buffer,
std::vector<SubsampleEntry>* subsamples);
// Verifies that the contents of |buffer| conform to
// Section 7.4.2.4.4 of ISO/IEC 23008-2.
// |subsamples| contains the information about what parts of the buffer are
// encrypted and which parts are clear.
// Returns true if |buffer| contains conformant Annex B data
// TODO(servolk): Remove the std::vector version when we can use,
// C++11's std::vector<T>::data() method.
static bool IsValidAnnexB(const std::vector<uint8>& buffer,
const std::vector<SubsampleEntry>& subsamples);
static bool IsValidAnnexB(const uint8* buffer, size_t size,
const std::vector<SubsampleEntry>& subsamples);
};
class HEVCBitstreamConverter : public BitstreamConverter {
public:
explicit HEVCBitstreamConverter(
scoped_ptr<HEVCDecoderConfigurationRecord> hevc_config);
// BitstreamConverter interface
bool ConvertFrame(std::vector<uint8>* frame_buf,
bool is_keyframe,
std::vector<SubsampleEntry>* subsamples) const override;
private:
~HEVCBitstreamConverter() override;
scoped_ptr<HEVCDecoderConfigurationRecord> hevc_config_;
};
} // namespace mp4
} // namespace media
#endif // MEDIA_FORMATS_MP4_HEVC_H_
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