libavformat/matroskaenc.c File Reference

#include "avformat.h"
#include "riff.h"
#include "isom.h"
#include "matroska.h"
#include "avc.h"
#include "flacenc.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/md5.h"
#include "libavcodec/xiph.h"
#include "libavcodec/mpeg4audio.h"

Go to the source code of this file.

Data Structures

struct  ebml_master
struct  mkv_seekhead_entry
struct  mkv_seekhead
struct  mkv_cuepoint
struct  mkv_cues
struct  mkv_track
struct  MatroskaMuxContext

Defines

#define MODE_MATROSKAv2   0x01
#define MODE_WEBM   0x02
#define MAX_SEEKENTRY_SIZE   21
 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit offset, 4 bytes for target EBML ID
#define MAX_CUETRACKPOS_SIZE   22
 per-cuepoint-track - 3 1-byte EBML IDs, 3 1-byte EBML sizes, 2 8-byte uint max
#define MAX_CUEPOINT_SIZE(num_tracks)   12 + MAX_CUETRACKPOS_SIZE*num_tracks
 per-cuepoint - 2 1-byte EBML IDs, 2 1-byte EBML sizes, 8-byte uint max

Functions

static int ebml_id_size (unsigned int id)
static void put_ebml_id (ByteIOContext *pb, unsigned int id)
static void put_ebml_size_unknown (ByteIOContext *pb, int bytes)
 Write an EBML size meaning "unknown size".
static int ebml_num_size (uint64_t num)
 Calculate how many bytes are needed to represent a given number in EBML.
static void put_ebml_num (ByteIOContext *pb, uint64_t num, int bytes)
 Write a number in EBML variable length format.
static void put_ebml_uint (ByteIOContext *pb, unsigned int elementid, uint64_t val)
static void put_ebml_float (ByteIOContext *pb, unsigned int elementid, double val)
static void put_ebml_binary (ByteIOContext *pb, unsigned int elementid, const uint8_t *buf, int size)
static void put_ebml_string (ByteIOContext *pb, unsigned int elementid, const char *str)
static void put_ebml_void (ByteIOContext *pb, uint64_t size)
 Writes a void element of a given size.
static ebml_master start_ebml_master (ByteIOContext *pb, unsigned int elementid, uint64_t expectedsize)
static void end_ebml_master (ByteIOContext *pb, ebml_master master)
static void put_xiph_size (ByteIOContext *pb, int size)
static mkv_seekhead * mkv_start_seekhead (ByteIOContext *pb, int64_t segment_offset, int numelements)
 Initialize a mkv_seekhead element to be ready to index level 1 Matroska elements.
static int mkv_add_seekhead_entry (mkv_seekhead *seekhead, unsigned int elementid, uint64_t filepos)
static int64_t mkv_write_seekhead (ByteIOContext *pb, mkv_seekhead *seekhead)
 Write the seek head to the file and free it.
static mkv_cues * mkv_start_cues (int64_t segment_offset)
static int mkv_add_cuepoint (mkv_cues *cues, int stream, int64_t ts, int64_t cluster_pos)
static int64_t mkv_write_cues (ByteIOContext *pb, mkv_cues *cues, int num_tracks)
static int put_xiph_codecpriv (AVFormatContext *s, ByteIOContext *pb, AVCodecContext *codec)
static void get_aac_sample_rates (AVFormatContext *s, AVCodecContext *codec, int *sample_rate, int *output_sample_rate)
static int mkv_write_codecprivate (AVFormatContext *s, ByteIOContext *pb, AVCodecContext *codec, int native_id, int qt_id)
static int mkv_write_tracks (AVFormatContext *s)
static int mkv_write_chapters (AVFormatContext *s)
static int mkv_write_header (AVFormatContext *s)
static int mkv_blockgroup_size (int pkt_size)
static int ass_get_duration (const uint8_t *p)
static int mkv_write_ass_blocks (AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt)
static void mkv_write_block (AVFormatContext *s, ByteIOContext *pb, unsigned int blockid, AVPacket *pkt, int flags)
static void mkv_flush_dynbuf (AVFormatContext *s)
static int mkv_write_packet (AVFormatContext *s, AVPacket *pkt)
static int mkv_write_trailer (AVFormatContext *s)

Define Documentation

#define MAX_CUEPOINT_SIZE ( num_tracks   )     12 + MAX_CUETRACKPOS_SIZE*num_tracks

per-cuepoint - 2 1-byte EBML IDs, 2 1-byte EBML sizes, 8-byte uint max

Definition at line 100 of file matroskaenc.c.

Referenced by mkv_write_cues().

#define MAX_CUETRACKPOS_SIZE   22

per-cuepoint-track - 3 1-byte EBML IDs, 3 1-byte EBML sizes, 2 8-byte uint max

Definition at line 97 of file matroskaenc.c.

Referenced by mkv_write_cues().

#define MAX_SEEKENTRY_SIZE   21

2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit offset, 4 bytes for target EBML ID

Definition at line 93 of file matroskaenc.c.

Referenced by mkv_start_seekhead(), and mkv_write_seekhead().

#define MODE_MATROSKAv2   0x01

Definition at line 68 of file matroskaenc.c.

Referenced by mkv_write_header().

#define MODE_WEBM   0x02

Definition at line 69 of file matroskaenc.c.

Referenced by mkv_write_header(), and mkv_write_tracks().

Function Documentation

static int ass_get_duration ( const uint8_t *  p  )  [static]

Definition at line 780 of file matroskaenc.c.

Referenced by mkv_write_ass_blocks().

static int ebml_id_size ( unsigned int  id  )  [static]

Definition at line 103 of file matroskaenc.c.

Referenced by mkv_write_seekhead(), and put_ebml_id().

static int ebml_num_size ( uint64_t  num  )  [static]

Calculate how many bytes are needed to represent a given number in EBML.

Definition at line 131 of file matroskaenc.c.

Referenced by mkv_blockgroup_size(), put_ebml_num(), and start_ebml_master().

static void end_ebml_master ( ByteIOContext *  pb,
ebml_master  master 
) [static]

Definition at line 227 of file matroskaenc.c.

Referenced by mkv_write_ass_blocks(), mkv_write_chapters(), mkv_write_cues(), mkv_write_header(), mkv_write_packet(), mkv_write_seekhead(), mkv_write_tracks(), and mkv_write_trailer().

static void get_aac_sample_rates ( AVFormatContext *  s,
AVCodecContext *  codec,
int *  sample_rate,
int *  output_sample_rate 
) [static]

Definition at line 436 of file matroskaenc.c.

Referenced by mkv_write_tracks().

static int mkv_add_cuepoint ( mkv_cues *  cues,
int  stream,
int64_t  ts,
int64_t  cluster_pos 
) [static]

Definition at line 354 of file matroskaenc.c.

Referenced by mkv_write_packet().

static int mkv_add_seekhead_entry ( mkv_seekhead *  seekhead,
unsigned int  elementid,
uint64_t  filepos 
) [static]

Definition at line 276 of file matroskaenc.c.

Referenced by mkv_write_chapters(), mkv_write_header(), mkv_write_packet(), mkv_write_tracks(), and mkv_write_trailer().

static int mkv_blockgroup_size ( int  pkt_size  )  [static]

Definition at line 769 of file matroskaenc.c.

Referenced by mkv_write_ass_blocks(), and mkv_write_packet().

static void mkv_flush_dynbuf ( AVFormatContext *  s  )  [static]

Definition at line 865 of file matroskaenc.c.

Referenced by mkv_write_packet(), and mkv_write_trailer().

static mkv_cues* mkv_start_cues ( int64_t  segment_offset  )  [static]

Definition at line 344 of file matroskaenc.c.

Referenced by mkv_write_header().

static mkv_seekhead* mkv_start_seekhead ( ByteIOContext *  pb,
int64_t  segment_offset,
int  numelements 
) [static]

Initialize a mkv_seekhead element to be ready to index level 1 Matroska elements.

If a maximum number of elements is specified, enough space will be reserved at the current file location to write a seek head of that size.

Parameters:
segment_offset The absolute offset to the position in the file where the segment begins.
numelements The maximum number of elements that will be indexed by this seek head, 0 if unlimited.

Definition at line 256 of file matroskaenc.c.

Referenced by mkv_write_header().

static int mkv_write_ass_blocks ( AVFormatContext *  s,
ByteIOContext *  pb,
AVPacket *  pkt 
) [static]

Definition at line 793 of file matroskaenc.c.

Referenced by mkv_write_packet().

static void mkv_write_block ( AVFormatContext *  s,
ByteIOContext *  pb,
unsigned int  blockid,
AVPacket *  pkt,
int  flags 
) [static]

Definition at line 838 of file matroskaenc.c.

Referenced by mkv_write_packet().

static int mkv_write_chapters ( AVFormatContext *  s  )  [static]

Definition at line 646 of file matroskaenc.c.

Referenced by mkv_write_header().

static int mkv_write_codecprivate ( AVFormatContext *  s,
ByteIOContext *  pb,
AVCodecContext *  codec,
int  native_id,
int  qt_id 
) [static]

Definition at line 463 of file matroskaenc.c.

Referenced by mkv_write_tracks().

static int64_t mkv_write_cues ( ByteIOContext *  pb,
mkv_cues *  cues,
int  num_tracks 
) [static]

Definition at line 373 of file matroskaenc.c.

Referenced by mkv_write_trailer().

static int mkv_write_header ( AVFormatContext *  s  )  [static]

Definition at line 690 of file matroskaenc.c.

static int mkv_write_packet ( AVFormatContext *  s,
AVPacket *  pkt 
) [static]

Definition at line 880 of file matroskaenc.c.

static int64_t mkv_write_seekhead ( ByteIOContext *  pb,
mkv_seekhead *  seekhead 
) [static]

Write the seek head to the file and free it.

If a maximum number of elements was specified to mkv_start_seekhead(), the seek head will be written at the location reserved for it. Otherwise, it is written at the current location in the file.

Returns:
The file offset where the seekhead was written, -1 if an error occurred.

Definition at line 304 of file matroskaenc.c.

Referenced by mkv_write_header(), and mkv_write_trailer().

static int mkv_write_tracks ( AVFormatContext *  s  )  [static]

Definition at line 519 of file matroskaenc.c.

Referenced by mkv_write_header().

static int mkv_write_trailer ( AVFormatContext *  s  )  [static]

Definition at line 944 of file matroskaenc.c.

static void put_ebml_binary ( ByteIOContext *  pb,
unsigned int  elementid,
const uint8_t *  buf,
int  size 
) [static]

Definition at line 182 of file matroskaenc.c.

Referenced by mkv_write_codecprivate(), mkv_write_trailer(), and put_ebml_string().

static void put_ebml_float ( ByteIOContext *  pb,
unsigned int  elementid,
double  val 
) [static]

Definition at line 175 of file matroskaenc.c.

Referenced by mkv_write_tracks(), and mkv_write_trailer().

static void put_ebml_id ( ByteIOContext *  pb,
unsigned int  id 
) [static]

Definition at line 108 of file matroskaenc.c.

Referenced by mkv_write_ass_blocks(), mkv_write_block(), mkv_write_seekhead(), put_ebml_binary(), put_ebml_float(), put_ebml_uint(), put_ebml_void(), and start_ebml_master().

static void put_ebml_num ( ByteIOContext *  pb,
uint64_t  num,
int  bytes 
) [static]

Write a number in EBML variable length format.

Parameters:
bytes The number of bytes that need to be used to write the number. If zero, any number of bytes can be used.

Definition at line 144 of file matroskaenc.c.

Referenced by end_ebml_master(), mkv_write_ass_blocks(), mkv_write_block(), mkv_write_seekhead(), put_ebml_binary(), put_ebml_float(), put_ebml_uint(), and put_ebml_void().

static void put_ebml_size_unknown ( ByteIOContext *  pb,
int  bytes 
) [static]

Write an EBML size meaning "unknown size".

Parameters:
bytes The number of bytes the size should occupy (maximum: 8).

Definition at line 120 of file matroskaenc.c.

Referenced by start_ebml_master().

static void put_ebml_string ( ByteIOContext *  pb,
unsigned int  elementid,
const char *  str 
) [static]

Definition at line 190 of file matroskaenc.c.

Referenced by mkv_write_chapters(), mkv_write_header(), and mkv_write_tracks().

static void put_ebml_uint ( ByteIOContext *  pb,
unsigned int  elementid,
uint64_t  val 
) [static]

Definition at line 163 of file matroskaenc.c.

Referenced by mkv_write_ass_blocks(), mkv_write_chapters(), mkv_write_cues(), mkv_write_header(), mkv_write_packet(), mkv_write_seekhead(), and mkv_write_tracks().

static void put_ebml_void ( ByteIOContext *  pb,
uint64_t  size 
) [static]

Writes a void element of a given size.

Useful for reserving space in the file to be written to later.

Parameters:
size The number of bytes to reserve, which must be at least 2.

Definition at line 201 of file matroskaenc.c.

Referenced by mkv_start_seekhead(), mkv_write_header(), and mkv_write_seekhead().

static int put_xiph_codecpriv ( AVFormatContext *  s,
ByteIOContext *  pb,
AVCodecContext *  codec 
) [static]

Definition at line 408 of file matroskaenc.c.

Referenced by mkv_write_codecprivate().

static void put_xiph_size ( ByteIOContext *  pb,
int  size 
) [static]

Definition at line 237 of file matroskaenc.c.

Referenced by put_xiph_codecpriv().

static ebml_master start_ebml_master ( ByteIOContext *  pb,
unsigned int  elementid,
uint64_t  expectedsize 
) [static]

Definition at line 219 of file matroskaenc.c.

Referenced by mkv_write_ass_blocks(), mkv_write_chapters(), mkv_write_cues(), mkv_write_header(), mkv_write_packet(), mkv_write_seekhead(), and mkv_write_tracks().

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