703 lines
17 KiB
C++
703 lines
17 KiB
C++
// Copyright (c) 2010 The WebM 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 MKVPARSER_HPP
|
|
#define MKVPARSER_HPP
|
|
|
|
#include <cstdlib>
|
|
#include <cstdio>
|
|
|
|
namespace mkvparser
|
|
{
|
|
|
|
const int E_FILE_FORMAT_INVALID = -2;
|
|
const int E_BUFFER_NOT_FULL = -3;
|
|
|
|
class IMkvReader
|
|
{
|
|
public:
|
|
virtual int Read(long long pos, long len, unsigned char* buf) = 0;
|
|
virtual int Length(long long* total, long long* available) = 0;
|
|
protected:
|
|
virtual ~IMkvReader();
|
|
};
|
|
|
|
long long GetUIntLength(IMkvReader*, long long, long&);
|
|
long long ReadUInt(IMkvReader*, long long, long&);
|
|
long long SyncReadUInt(IMkvReader*, long long pos, long long stop, long&);
|
|
long long UnserializeUInt(IMkvReader*, long long pos, long long size);
|
|
float Unserialize4Float(IMkvReader*, long long);
|
|
double Unserialize8Double(IMkvReader*, long long);
|
|
short Unserialize2SInt(IMkvReader*, long long);
|
|
signed char Unserialize1SInt(IMkvReader*, long long);
|
|
bool Match(IMkvReader*, long long&, unsigned long, long long&);
|
|
bool Match(IMkvReader*, long long&, unsigned long, char*&);
|
|
bool Match(IMkvReader*, long long&, unsigned long, unsigned char*&, size_t&);
|
|
bool Match(IMkvReader*, long long&, unsigned long, double&);
|
|
bool Match(IMkvReader*, long long&, unsigned long, short&);
|
|
|
|
void GetVersion(int& major, int& minor, int& build, int& revision);
|
|
|
|
struct EBMLHeader
|
|
{
|
|
EBMLHeader();
|
|
~EBMLHeader();
|
|
long long m_version;
|
|
long long m_readVersion;
|
|
long long m_maxIdLength;
|
|
long long m_maxSizeLength;
|
|
char* m_docType;
|
|
long long m_docTypeVersion;
|
|
long long m_docTypeReadVersion;
|
|
|
|
long long Parse(IMkvReader*, long long&);
|
|
void Init();
|
|
};
|
|
|
|
|
|
class Segment;
|
|
class Track;
|
|
class Cluster;
|
|
|
|
class Block
|
|
{
|
|
Block(const Block&);
|
|
Block& operator=(const Block&);
|
|
|
|
public:
|
|
const long long m_start;
|
|
const long long m_size;
|
|
|
|
Block(long long start, long long size, IMkvReader*);
|
|
~Block();
|
|
|
|
long long GetTrackNumber() const;
|
|
long long GetTimeCode(const Cluster*) const; //absolute, but not scaled
|
|
long long GetTime(const Cluster*) const; //absolute, and scaled (ns)
|
|
bool IsKey() const;
|
|
void SetKey(bool);
|
|
bool IsInvisible() const;
|
|
|
|
int GetFrameCount() const; //to index frames: [0, count)
|
|
|
|
struct Frame
|
|
{
|
|
long long pos; //absolute offset
|
|
long len;
|
|
|
|
long Read(IMkvReader*, unsigned char*) const;
|
|
};
|
|
|
|
const Frame& GetFrame(int frame_index) const;
|
|
|
|
private:
|
|
long long m_track; //Track::Number()
|
|
short m_timecode; //relative to cluster
|
|
unsigned char m_flags;
|
|
|
|
Frame* m_frames;
|
|
int m_frame_count;
|
|
|
|
};
|
|
|
|
|
|
class BlockEntry
|
|
{
|
|
BlockEntry(const BlockEntry&);
|
|
BlockEntry& operator=(const BlockEntry&);
|
|
|
|
public:
|
|
virtual ~BlockEntry();
|
|
virtual bool EOS() const = 0;
|
|
virtual const Cluster* GetCluster() const = 0;
|
|
virtual size_t GetIndex() const = 0;
|
|
virtual const Block* GetBlock() const = 0;
|
|
//virtual bool IsBFrame() const = 0;
|
|
|
|
protected:
|
|
BlockEntry();
|
|
|
|
};
|
|
|
|
|
|
class SimpleBlock : public BlockEntry
|
|
{
|
|
SimpleBlock(const SimpleBlock&);
|
|
SimpleBlock& operator=(const SimpleBlock&);
|
|
|
|
public:
|
|
SimpleBlock(Cluster*, size_t, long long start, long long size);
|
|
|
|
bool EOS() const;
|
|
const Cluster* GetCluster() const;
|
|
size_t GetIndex() const;
|
|
const Block* GetBlock() const;
|
|
//bool IsBFrame() const;
|
|
|
|
protected:
|
|
Cluster* const m_pCluster;
|
|
const size_t m_index;
|
|
Block m_block;
|
|
|
|
};
|
|
|
|
|
|
class BlockGroup : public BlockEntry
|
|
{
|
|
BlockGroup(const BlockGroup&);
|
|
BlockGroup& operator=(const BlockGroup&);
|
|
|
|
public:
|
|
BlockGroup(Cluster*, size_t, long long, long long);
|
|
~BlockGroup();
|
|
|
|
bool EOS() const;
|
|
const Cluster* GetCluster() const;
|
|
size_t GetIndex() const;
|
|
const Block* GetBlock() const;
|
|
//bool IsBFrame() const;
|
|
|
|
short GetPrevTimeCode() const; //relative to block's time
|
|
short GetNextTimeCode() const; //as above
|
|
|
|
protected:
|
|
Cluster* const m_pCluster;
|
|
const size_t m_index;
|
|
|
|
private:
|
|
BlockGroup(Cluster*, size_t, unsigned long);
|
|
void ParseBlock(long long start, long long size);
|
|
|
|
short m_prevTimeCode;
|
|
short m_nextTimeCode;
|
|
|
|
//TODO: the Matroska spec says you can have multiple blocks within the
|
|
//same block group, with blocks ranked by priority (the flag bits).
|
|
//For now we just cache a single block.
|
|
#if 0
|
|
typedef std::deque<Block*> blocks_t;
|
|
blocks_t m_blocks; //In practice should contain only a single element.
|
|
#else
|
|
Block* m_pBlock;
|
|
#endif
|
|
|
|
};
|
|
|
|
|
|
class Track
|
|
{
|
|
Track(const Track&);
|
|
Track& operator=(const Track&);
|
|
|
|
public:
|
|
Segment* const m_pSegment;
|
|
const long long m_element_start;
|
|
const long long m_element_size;
|
|
virtual ~Track();
|
|
|
|
long long GetType() const;
|
|
long long GetNumber() const;
|
|
unsigned long long GetUid() const;
|
|
const char* GetNameAsUTF8() const;
|
|
const char* GetCodecNameAsUTF8() const;
|
|
const char* GetCodecId() const;
|
|
const unsigned char* GetCodecPrivate(size_t&) const;
|
|
bool GetLacing() const;
|
|
|
|
const BlockEntry* GetEOS() const;
|
|
|
|
struct Settings
|
|
{
|
|
long long start;
|
|
long long size;
|
|
};
|
|
|
|
struct Info
|
|
{
|
|
long long type;
|
|
long long number;
|
|
unsigned long long uid;
|
|
char* nameAsUTF8;
|
|
char* codecId;
|
|
unsigned char* codecPrivate;
|
|
size_t codecPrivateSize;
|
|
char* codecNameAsUTF8;
|
|
bool lacing;
|
|
Settings settings;
|
|
|
|
Info();
|
|
void Clear();
|
|
};
|
|
|
|
long GetFirst(const BlockEntry*&) const;
|
|
long GetNext(const BlockEntry* pCurr, const BlockEntry*& pNext) const;
|
|
virtual bool VetEntry(const BlockEntry*) const = 0;
|
|
virtual long Seek(long long time_ns, const BlockEntry*&) const = 0;
|
|
|
|
protected:
|
|
Track(
|
|
Segment*,
|
|
const Info&,
|
|
long long element_start,
|
|
long long element_size);
|
|
const Info m_info;
|
|
|
|
class EOSBlock : public BlockEntry
|
|
{
|
|
public:
|
|
EOSBlock();
|
|
|
|
bool EOS() const;
|
|
const Cluster* GetCluster() const;
|
|
size_t GetIndex() const;
|
|
const Block* GetBlock() const;
|
|
bool IsBFrame() const;
|
|
};
|
|
|
|
EOSBlock m_eos;
|
|
|
|
};
|
|
|
|
|
|
class VideoTrack : public Track
|
|
{
|
|
VideoTrack(const VideoTrack&);
|
|
VideoTrack& operator=(const VideoTrack&);
|
|
|
|
public:
|
|
VideoTrack(
|
|
Segment*,
|
|
const Info&,
|
|
long long element_start,
|
|
long long element_size);
|
|
long long GetWidth() const;
|
|
long long GetHeight() const;
|
|
double GetFrameRate() const;
|
|
|
|
bool VetEntry(const BlockEntry*) const;
|
|
long Seek(long long time_ns, const BlockEntry*&) const;
|
|
|
|
private:
|
|
long long m_width;
|
|
long long m_height;
|
|
double m_rate;
|
|
|
|
};
|
|
|
|
|
|
class AudioTrack : public Track
|
|
{
|
|
AudioTrack(const AudioTrack&);
|
|
AudioTrack& operator=(const AudioTrack&);
|
|
|
|
public:
|
|
AudioTrack(
|
|
Segment*,
|
|
const Info&,
|
|
long long element_start,
|
|
long long element_size);
|
|
double GetSamplingRate() const;
|
|
long long GetChannels() const;
|
|
long long GetBitDepth() const;
|
|
bool VetEntry(const BlockEntry*) const;
|
|
long Seek(long long time_ns, const BlockEntry*&) const;
|
|
|
|
private:
|
|
double m_rate;
|
|
long long m_channels;
|
|
long long m_bitDepth;
|
|
};
|
|
|
|
|
|
class Tracks
|
|
{
|
|
Tracks(const Tracks&);
|
|
Tracks& operator=(const Tracks&);
|
|
|
|
public:
|
|
Segment* const m_pSegment;
|
|
const long long m_start;
|
|
const long long m_size;
|
|
const long long m_element_start;
|
|
const long long m_element_size;
|
|
|
|
Tracks(
|
|
Segment*,
|
|
long long start,
|
|
long long size,
|
|
long long element_start,
|
|
long long element_size);
|
|
virtual ~Tracks();
|
|
|
|
const Track* GetTrackByNumber(unsigned long tn) const;
|
|
const Track* GetTrackByIndex(unsigned long idx) const;
|
|
|
|
private:
|
|
Track** m_trackEntries;
|
|
Track** m_trackEntriesEnd;
|
|
|
|
void ParseTrackEntry(
|
|
long long,
|
|
long long,
|
|
Track*&,
|
|
long long element_start,
|
|
long long element_size);
|
|
|
|
public:
|
|
unsigned long GetTracksCount() const;
|
|
};
|
|
|
|
|
|
class SegmentInfo
|
|
{
|
|
SegmentInfo(const SegmentInfo&);
|
|
SegmentInfo& operator=(const SegmentInfo&);
|
|
|
|
public:
|
|
Segment* const m_pSegment;
|
|
const long long m_start;
|
|
const long long m_size;
|
|
const long long m_element_start;
|
|
const long long m_element_size;
|
|
|
|
SegmentInfo(
|
|
Segment*,
|
|
long long start,
|
|
long long size,
|
|
long long element_start,
|
|
long long element_size);
|
|
|
|
~SegmentInfo();
|
|
|
|
long long GetTimeCodeScale() const;
|
|
long long GetDuration() const; //scaled
|
|
const char* GetMuxingAppAsUTF8() const;
|
|
const char* GetWritingAppAsUTF8() const;
|
|
const char* GetTitleAsUTF8() const;
|
|
|
|
private:
|
|
long long m_timecodeScale;
|
|
double m_duration;
|
|
char* m_pMuxingAppAsUTF8;
|
|
char* m_pWritingAppAsUTF8;
|
|
char* m_pTitleAsUTF8;
|
|
};
|
|
|
|
|
|
class SeekHead
|
|
{
|
|
SeekHead(const SeekHead&);
|
|
SeekHead& operator=(const SeekHead&);
|
|
|
|
public:
|
|
Segment* const m_pSegment;
|
|
const long long m_start;
|
|
const long long m_size;
|
|
const long long m_element_start;
|
|
const long long m_element_size;
|
|
|
|
SeekHead(
|
|
Segment*,
|
|
long long start,
|
|
long long size,
|
|
long long element_start,
|
|
long long element_size);
|
|
|
|
~SeekHead();
|
|
|
|
struct Entry
|
|
{
|
|
long long id;
|
|
long long pos;
|
|
};
|
|
|
|
int GetCount() const;
|
|
const Entry* GetEntry(int idx) const;
|
|
|
|
private:
|
|
Entry* m_entries;
|
|
int m_count;
|
|
|
|
static void ParseEntry(
|
|
IMkvReader*,
|
|
long long pos,
|
|
long long size,
|
|
Entry*);
|
|
|
|
};
|
|
|
|
class Cues;
|
|
class CuePoint
|
|
{
|
|
friend class Cues;
|
|
|
|
CuePoint(size_t, long long);
|
|
~CuePoint();
|
|
|
|
CuePoint(const CuePoint&);
|
|
CuePoint& operator=(const CuePoint&);
|
|
|
|
public:
|
|
long long m_element_start;
|
|
long long m_element_size;
|
|
|
|
void Load(IMkvReader*);
|
|
|
|
long long GetTimeCode() const; //absolute but unscaled
|
|
long long GetTime(Segment*) const; //absolute and scaled (ns units)
|
|
|
|
struct TrackPosition
|
|
{
|
|
long long m_track;
|
|
long long m_pos; //of cluster
|
|
long long m_block;
|
|
//codec_state //defaults to 0
|
|
//reference = clusters containing req'd referenced blocks
|
|
// reftime = timecode of the referenced block
|
|
|
|
void Parse(IMkvReader*, long long, long long);
|
|
};
|
|
|
|
const TrackPosition* Find(const Track*) const;
|
|
|
|
private:
|
|
const size_t m_index;
|
|
long long m_timecode;
|
|
TrackPosition* m_track_positions;
|
|
size_t m_track_positions_count;
|
|
|
|
};
|
|
|
|
|
|
class Cues
|
|
{
|
|
friend class Segment;
|
|
|
|
Cues(
|
|
Segment*,
|
|
long long start,
|
|
long long size,
|
|
long long element_start,
|
|
long long element_size);
|
|
~Cues();
|
|
|
|
Cues(const Cues&);
|
|
Cues& operator=(const Cues&);
|
|
|
|
public:
|
|
Segment* const m_pSegment;
|
|
const long long m_start;
|
|
const long long m_size;
|
|
const long long m_element_start;
|
|
const long long m_element_size;
|
|
|
|
bool Find( //lower bound of time_ns
|
|
long long time_ns,
|
|
const Track*,
|
|
const CuePoint*&,
|
|
const CuePoint::TrackPosition*&) const;
|
|
|
|
#if 0
|
|
bool FindNext( //upper_bound of time_ns
|
|
long long time_ns,
|
|
const Track*,
|
|
const CuePoint*&,
|
|
const CuePoint::TrackPosition*&) const;
|
|
#endif
|
|
|
|
const CuePoint* GetFirst() const;
|
|
const CuePoint* GetLast() const;
|
|
const CuePoint* GetNext(const CuePoint*) const;
|
|
|
|
const BlockEntry* GetBlock(
|
|
const CuePoint*,
|
|
const CuePoint::TrackPosition*) const;
|
|
|
|
bool LoadCuePoint() const;
|
|
|
|
private:
|
|
void Init() const;
|
|
void PreloadCuePoint(size_t&, long long) const;
|
|
|
|
mutable CuePoint** m_cue_points;
|
|
mutable size_t m_count;
|
|
mutable size_t m_preload_count;
|
|
mutable long long m_pos;
|
|
|
|
};
|
|
|
|
|
|
class Cluster
|
|
{
|
|
Cluster(const Cluster&);
|
|
Cluster& operator=(const Cluster&);
|
|
|
|
public:
|
|
Segment* const m_pSegment;
|
|
|
|
public:
|
|
static Cluster* Parse(
|
|
Segment*,
|
|
long,
|
|
long long off,
|
|
long long element_start,
|
|
long long element_size);
|
|
|
|
Cluster(); //EndOfStream
|
|
~Cluster();
|
|
|
|
bool EOS() const;
|
|
|
|
long long GetTimeCode() const; //absolute, but not scaled
|
|
long long GetTime() const; //absolute, and scaled (nanosecond units)
|
|
long long GetFirstTime() const; //time (ns) of first (earliest) block
|
|
long long GetLastTime() const; //time (ns) of last (latest) block
|
|
|
|
const BlockEntry* GetFirst() const;
|
|
const BlockEntry* GetLast() const;
|
|
const BlockEntry* GetNext(const BlockEntry*) const;
|
|
const BlockEntry* GetEntry(const Track*, long long ns = -1) const;
|
|
const BlockEntry* GetEntry(
|
|
const CuePoint&,
|
|
const CuePoint::TrackPosition&) const;
|
|
const BlockEntry* GetMaxKey(const VideoTrack*) const;
|
|
|
|
static bool HasBlockEntries(const Segment*, long long);
|
|
|
|
void Load() const;
|
|
long Load(long long& pos, long& size) const;
|
|
|
|
protected:
|
|
Cluster(
|
|
Segment*,
|
|
long,
|
|
long long off,
|
|
long long element_start,
|
|
long long element_size);
|
|
|
|
public:
|
|
//TODO: these should all be private, with public selector functions
|
|
long m_index;
|
|
mutable long long m_pos;
|
|
mutable long long m_size;
|
|
const long long m_element_start;
|
|
const long long m_element_size;
|
|
|
|
private:
|
|
mutable long long m_timecode;
|
|
mutable BlockEntry** m_entries;
|
|
mutable long m_entries_count;
|
|
|
|
void LoadBlockEntries() const;
|
|
void ParseBlockGroup(long long, long long, size_t) const;
|
|
void ParseSimpleBlock(long long, long long, size_t) const;
|
|
|
|
};
|
|
|
|
|
|
class Segment
|
|
{
|
|
friend class Cues;
|
|
friend class VideoTrack;
|
|
friend class AudioTrack;
|
|
|
|
Segment(const Segment&);
|
|
Segment& operator=(const Segment&);
|
|
|
|
private:
|
|
Segment(IMkvReader*, long long pos, long long size);
|
|
|
|
public:
|
|
IMkvReader* const m_pReader;
|
|
const long long m_start; //posn of segment payload
|
|
const long long m_size; //size of segment payload
|
|
Cluster m_eos; //TODO: make private?
|
|
|
|
static long long CreateInstance(IMkvReader*, long long, Segment*&);
|
|
~Segment();
|
|
|
|
long Load(); //loads headers and all clusters
|
|
|
|
//for incremental loading
|
|
long long Unparsed() const;
|
|
long long ParseHeaders(); //stops when first cluster is found
|
|
//long FindNextCluster(long long& pos, long& size) const;
|
|
long LoadCluster(long long& pos, long& size); //load one cluster
|
|
long LoadCluster();
|
|
|
|
long ParseNext(
|
|
const Cluster* pCurr,
|
|
const Cluster*& pNext,
|
|
long long& pos,
|
|
long& size);
|
|
|
|
//This pair parses one cluster, but only changes the state of the
|
|
//segment object when the cluster is actually added to the index.
|
|
long ParseCluster(long long& cluster_pos, long long& new_pos) const;
|
|
bool AddCluster(long long cluster_pos, long long new_pos);
|
|
|
|
const SeekHead* GetSeekHead() const;
|
|
const Tracks* GetTracks() const;
|
|
const SegmentInfo* GetInfo() const;
|
|
const Cues* GetCues() const;
|
|
|
|
long long GetDuration() const;
|
|
|
|
unsigned long GetCount() const;
|
|
const Cluster* GetFirst() const;
|
|
const Cluster* GetLast() const;
|
|
const Cluster* GetNext(const Cluster*);
|
|
|
|
const Cluster* FindCluster(long long time_nanoseconds) const;
|
|
//const BlockEntry* Seek(long long time_nanoseconds, const Track*) const;
|
|
|
|
const Cluster* FindOrPreloadCluster(long long pos);
|
|
|
|
long ParseCues(
|
|
long long cues_off, //offset relative to start of segment
|
|
long long& parse_pos,
|
|
long& parse_len);
|
|
|
|
private:
|
|
|
|
long long m_pos; //absolute file posn; what has been consumed so far
|
|
|
|
SeekHead* m_pSeekHead;
|
|
SegmentInfo* m_pInfo;
|
|
Tracks* m_pTracks;
|
|
Cues* m_pCues;
|
|
Cluster** m_clusters;
|
|
long m_clusterCount; //number of entries for which m_index >= 0
|
|
long m_clusterPreloadCount; //number of entries for which m_index < 0
|
|
long m_clusterSize; //array size
|
|
|
|
void AppendCluster(Cluster*);
|
|
void PreloadCluster(Cluster*, ptrdiff_t);
|
|
|
|
//void ParseSeekHead(long long pos, long long size);
|
|
//void ParseSeekEntry(long long pos, long long size);
|
|
//void ParseCues(long long);
|
|
|
|
const BlockEntry* GetBlock(
|
|
const CuePoint&,
|
|
const CuePoint::TrackPosition&);
|
|
|
|
};
|
|
|
|
} //end namespace mkvparser
|
|
|
|
inline long mkvparser::Segment::LoadCluster()
|
|
{
|
|
long long pos;
|
|
long size;
|
|
|
|
return LoadCluster(pos, size);
|
|
}
|
|
|
|
#endif //MKVPARSER_HPP
|