mxfdec.c File Reference

#include <inttypes.h>
#include "libavutil/aes.h"
#include "libavutil/avassert.h"
#include "libavutil/mathematics.h"
#include "libavcodec/bytestream.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/timecode.h"
#include "avformat.h"
#include "internal.h"
#include "mxf.h"

Go to the source code of this file.

Data Structures
struct	MXFPartition
struct	MXFCryptoContext
struct	MXFStructuralComponent
struct	MXFSequence
struct	MXFTimecodeComponent
struct	MXFPulldownComponent
struct	MXFEssenceGroup
struct	MXFTrack
struct	MXFDescriptor
struct	MXFIndexTableSegment
struct	MXFPackage
struct	MXFMetadataSet
struct	MXFIndexTable
struct	MXFContext
struct	MXFMetadataReadTableEntry

Macros
#define	MXF_TFF   1
#define	MXF_BFF   2
#define	IS_KLV_KEY(x, y)   (!memcmp(x, y, sizeof(y)))
#define	SET_STR_METADATA(pb, name, str)
#define	SET_UID_METADATA(pb, name, var, str)
#define	SET_TS_METADATA(pb, name, var, str)

Typedefs
typedef int	MXFMetadataReadFunc (void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)

Enumerations
enum	MXFPartitionType { Header, BodyPartition, Footer }
enum	MXFOP {   OP1a = 1, OP1b, OP1c, OP2a,   OP2b, OP2c, OP3a, OP3b,   OP3c, OPAtom, OPSONYOpt }
enum	MXFWrappingScheme { Frame, Clip }

Functions
static int	mxf_read_close (AVFormatContext *s)
static int64_t	klv_decode_ber_length (AVIOContext *pb)
static int	mxf_read_sync (AVIOContext *pb, const uint8_t *key, unsigned size)
static int	klv_read_packet (KLVPacket *klv, AVIOContext *pb)
static int	mxf_get_stream_index (AVFormatContext *s, KLVPacket *klv)
static int	mxf_get_d10_aes3_packet (AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
static int	mxf_decrypt_triplet (AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
static int	mxf_read_primer_pack (void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
static int	mxf_read_partition_pack (void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
static int	mxf_add_metadata_set (MXFContext *mxf, void *metadata_set)
static int	mxf_read_cryptographic_context (void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
static int	mxf_read_content_storage (void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
static int	mxf_read_source_clip (void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
static int	mxf_read_timecode_component (void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
static int	mxf_read_pulldown_component (void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
static int	mxf_read_track (void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
static int	mxf_read_sequence (void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
static int	mxf_read_essence_group (void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
static int	mxf_read_utf16_string (AVIOContext *pb, int size, char **str)
static int	mxf_read_package (void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
static int	mxf_read_index_entry_array (AVIOContext *pb, MXFIndexTableSegment *segment)
static int	mxf_read_index_table_segment (void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
static void	mxf_read_pixel_layout (AVIOContext *pb, MXFDescriptor *descriptor)
static int	mxf_read_generic_descriptor (void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
static int	mxf_match_uid (const UID key, const UID uid, int len)
static const MXFCodecUL *	mxf_get_codec_ul (const MXFCodecUL *uls, UID *uid)
static void *	mxf_resolve_strong_ref (MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
static int	mxf_get_sorted_table_segments (MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
static int	mxf_absolute_bodysid_offset (MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
	Computes the absolute file offset of the given essence container offset.
static int64_t	mxf_essence_container_end (MXFContext *mxf, int body_sid)
	Returns the end position of the essence container with given BodySID, or zero if unknown.
static int	mxf_edit_unit_absolute_offset (MXFContext *mxf, MXFIndexTable *index_table, int64_t edit_unit, int64_t *edit_unit_out, int64_t *offset_out, int nag)
static int	mxf_compute_ptses_fake_index (MXFContext *mxf, MXFIndexTable *index_table)
static int	mxf_compute_index_tables (MXFContext *mxf)
	Sorts and collects index table segments into index tables.
static int	mxf_is_intra_only (MXFDescriptor *descriptor)
static int	mxf_uid_to_str (UID uid, char **str)
static int	mxf_add_uid_metadata (AVDictionary **pm, const char *key, UID uid)
static int	mxf_add_timecode_metadata (AVDictionary **pm, const char *key, AVTimecode *tc)
static MXFTimecodeComponent *	mxf_resolve_timecode_component (MXFContext *mxf, UID *strong_ref)
static MXFPackage *	mxf_resolve_source_package (MXFContext *mxf, UID package_uid)
static MXFStructuralComponent *	mxf_resolve_essence_group_choice (MXFContext *mxf, MXFEssenceGroup *essence_group)
static MXFStructuralComponent *	mxf_resolve_sourceclip (MXFContext *mxf, UID *strong_ref)
static int	mxf_parse_physical_source_package (MXFContext *mxf, MXFTrack *source_track, AVStream *st)
static int	mxf_parse_structural_metadata (MXFContext *mxf)
static int	mxf_timestamp_to_str (uint64_t timestamp, char **str)
static int	mxf_read_identification_metadata (void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
static int	mxf_metadataset_init (MXFMetadataSet *ctx, enum MXFMetadataSetType type)
static int	mxf_read_local_tags (MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
static int	mxf_is_partition_pack_key (UID key)
	Matches any partition pack key, in other words:
static int	mxf_parse_klv (MXFContext *mxf, KLVPacket klv, MXFMetadataReadFunc *read, int ctx_size, enum MXFMetadataSetType type)
	Parses a metadata KLV.
static int	mxf_seek_to_previous_partition (MXFContext *mxf)
	Seeks to the previous partition and parses it, if possible.
static int	mxf_parse_handle_essence (MXFContext *mxf)
	Called when essence is encountered.
static int	mxf_parse_handle_partition_or_eof (MXFContext *mxf)
	Called when the next partition or EOF is encountered.
static void	mxf_compute_essence_containers (MXFContext *mxf)
	Figures out the proper offset and length of the essence container in each partition.
static int64_t	round_to_kag (int64_t position, int kag_size)
static int	is_pcm (enum AVCodecID codec_id)
static void	mxf_handle_small_eubc (AVFormatContext *s)
	Deal with the case where for some audio atoms EditUnitByteCount is very small (2, 4..).
static void	mxf_read_random_index_pack (AVFormatContext *s)
static int	mxf_read_header (AVFormatContext *s)
static int64_t	mxf_set_current_edit_unit (MXFContext *mxf, int64_t current_offset)
	Sets mxf->current_edit_unit based on what offset we're currently at.
static int	mxf_compute_sample_count (MXFContext *mxf, int stream_index, uint64_t *sample_count)
static int	mxf_set_audio_pts (MXFContext *mxf, AVCodecContext *codec, AVPacket *pkt)
static int	mxf_read_packet_old (AVFormatContext *s, AVPacket *pkt)
static int	mxf_read_packet (AVFormatContext *s, AVPacket *pkt)
static int	mxf_probe (AVProbeData *p)
static int	mxf_read_seek (AVFormatContext *s, int stream_index, int64_t sample_time, int flags)

Variables
static const uint8_t	mxf_header_partition_pack_key [] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 }
static const uint8_t	mxf_essence_element_key [] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 }
static const uint8_t	mxf_avid_essence_element_key [] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 }
static const uint8_t	mxf_system_item_key [] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x03,0x01,0x04 }
static const uint8_t	mxf_klv_key [] = { 0x06,0x0e,0x2b,0x34 }
static const uint8_t	mxf_crypto_source_container_ul [] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x09,0x06,0x01,0x01,0x02,0x02,0x00,0x00,0x00 }
static const uint8_t	mxf_encrypted_triplet_key [] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 }
static const uint8_t	mxf_encrypted_essence_container [] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 }
static const uint8_t	mxf_random_index_pack_key [] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x11,0x01,0x00 }
static const uint8_t	mxf_sony_mpeg4_extradata [] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 }
static const MXFCodecUL	mxf_picture_essence_container_uls []
static const MXFCodecUL	mxf_intra_only_essence_container_uls []
static const MXFCodecUL	mxf_intra_only_picture_essence_coding_uls []
static const MXFCodecUL	mxf_sound_essence_container_uls []
static const MXFCodecUL	mxf_data_essence_container_uls []
static const char *const	mxf_data_essence_descriptor []
static const MXFMetadataReadTableEntry	mxf_metadata_read_table []
AVInputFormat	ff_mxf_demuxer

Macro Definition Documentation

#define MXF_TFF   1

Definition at line 167 of file mxfdec.c.

Referenced by mxf_parse_structural_metadata().

#define MXF_BFF   2

Definition at line 168 of file mxfdec.c.

Referenced by mxf_parse_structural_metadata().

#define IS_KLV_KEY	(		x,
			y
	)		(!memcmp(x, y, sizeof(y)))

Definition at line 283 of file mxfdec.c.

Referenced by mxf_decrypt_triplet(), mxf_parse_structural_metadata(), mxf_read_cryptographic_context(), mxf_read_generic_descriptor(), mxf_read_header(), mxf_read_packet_old(), and mxf_read_random_index_pack().

#define SET_STR_METADATA	(		pb,
			name,
			str
	)

Value:

do { \
    if ((ret = mxf_read_utf16_string(pb, size, &str)) < 0) \
        return ret; \
    av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
} while (0)

Definition at line 1984 of file mxfdec.c.

Referenced by mxf_read_identification_metadata().

#define SET_UID_METADATA	(		pb,
			name,
			var,
			str
	)

Value:

do { \
    avio_read(pb, var, 16); \
    if ((ret = mxf_uid_to_str(var, &str)) < 0) \
        return ret; \
    av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
} while (0)

Definition at line 1990 of file mxfdec.c.

Referenced by mxf_read_identification_metadata().

#define SET_TS_METADATA	(		pb,
			name,
			var,
			str
	)

Value:

do { \
    var = avio_rb64(pb); \
    if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
        return ret; \
    av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
} while (0)

Definition at line 1997 of file mxfdec.c.

Referenced by mxf_read_identification_metadata().

Typedef Documentation

typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)

Definition at line 259 of file mxfdec.c.

Enumeration Type Documentation

enum MXFPartitionType

Enumerator:

Header
BodyPartition
Footer

Definition at line 58 of file mxfdec.c.

enum MXFOP

Enumerator:

OP1a
OP1b
OP1c
OP2a
OP2b
OP2c
OP3a
OP3b
OP3c
OPAtom
OPSONYOpt

Definition at line 64 of file mxfdec.c.

enum MXFWrappingScheme

Enumerator:

Frame
Clip

Definition at line 253 of file mxfdec.c.

Function Documentation

static int mxf_read_close ( AVFormatContext *  s )

static

Definition at line 2817 of file mxfdec.c.

Referenced by mxf_read_header().

static int64_t klv_decode_ber_length ( AVIOContext *  pb )

static

Definition at line 285 of file mxfdec.c.

Referenced by klv_read_packet(), and mxf_decrypt_triplet().

static int mxf_read_sync ( AVIOContext *  pb, const uint8_t *  key, unsigned  size  )

static

Definition at line 300 of file mxfdec.c.

Referenced by klv_read_packet(), and mxf_read_header().

static int klv_read_packet ( KLVPacket *  klv, AVIOContext *  pb  )

static

Definition at line 313 of file mxfdec.c.

Referenced by mxf_read_header(), mxf_read_packet_old(), mxf_read_random_index_pack(), and mxf_seek_to_previous_partition().

static int mxf_get_stream_index ( AVFormatContext *  s, KLVPacket *  klv  )

static

Definition at line 324 of file mxfdec.c.

Referenced by mxf_decrypt_triplet(), and mxf_read_packet_old().

static int mxf_get_d10_aes3_packet ( AVIOContext *  pb, AVStream *  st, AVPacket *  pkt, int64_t  length  )

static

Definition at line 339 of file mxfdec.c.

Referenced by mxf_read_packet_old().

static int mxf_decrypt_triplet ( AVFormatContext *  s, AVPacket *  pkt, KLVPacket *  klv  )

static

Definition at line 367 of file mxfdec.c.

Referenced by mxf_read_packet_old().

static int mxf_read_primer_pack ( void *  arg, AVIOContext *  pb, int  tag, int  size, UID  uid, int64_t  klv_offset  )

static

Definition at line 430 of file mxfdec.c.

static int mxf_read_partition_pack ( void *  arg, AVIOContext *  pb, int  tag, int  size, UID  uid, int64_t  klv_offset  )

static

Definition at line 456 of file mxfdec.c.

Referenced by mxf_seek_to_previous_partition().

static int mxf_add_metadata_set ( MXFContext *  mxf, void *  metadata_set  )

static

Definition at line 616 of file mxfdec.c.

Referenced by mxf_read_local_tags().

static int mxf_read_cryptographic_context ( void *  arg, AVIOContext *  pb, int  tag, int  size, UID  uid, int64_t  klv_offset  )

static

Definition at line 629 of file mxfdec.c.

static int mxf_read_content_storage ( void *  arg, AVIOContext *  pb, int  tag, int  size, UID  uid, int64_t  klv_offset  )

static

Definition at line 639 of file mxfdec.c.

static int mxf_read_source_clip ( void *  arg, AVIOContext *  pb, int  tag, int  size, UID  uid, int64_t  klv_offset  )

static

Definition at line 658 of file mxfdec.c.

static int mxf_read_timecode_component ( void *  arg, AVIOContext *  pb, int  tag, int  size, UID  uid, int64_t  klv_offset  )

static

Definition at line 680 of file mxfdec.c.

static int mxf_read_pulldown_component ( void *  arg, AVIOContext *  pb, int  tag, int  size, UID  uid, int64_t  klv_offset  )

static

Definition at line 697 of file mxfdec.c.

static int mxf_read_track ( void *  arg, AVIOContext *  pb, int  tag, int  size, UID  uid, int64_t  klv_offset  )

static

Definition at line 708 of file mxfdec.c.

static int mxf_read_sequence ( void *  arg, AVIOContext *  pb, int  tag, int  size, UID  uid, int64_t  klv_offset  )

static

Definition at line 729 of file mxfdec.c.

static int mxf_read_essence_group ( void *  arg, AVIOContext *  pb, int  tag, int  size, UID  uid, int64_t  klv_offset  )

static

Definition at line 756 of file mxfdec.c.

static int mxf_read_utf16_string ( AVIOContext *  pb, int  size, char **  str  )

static

Definition at line 777 of file mxfdec.c.

Referenced by mxf_read_package().

static int mxf_read_package ( void *  arg, AVIOContext *  pb, int  tag, int  size, UID  uid, int64_t  klv_offset  )

static

Definition at line 798 of file mxfdec.c.

static int mxf_read_index_entry_array ( AVIOContext *  pb, MXFIndexTableSegment *  segment  )

static

Definition at line 824 of file mxfdec.c.

Referenced by mxf_read_index_table_segment().

static int mxf_read_index_table_segment ( void *  arg, AVIOContext *  pb, int  tag, int  size, UID  uid, int64_t  klv_offset  )

static

Definition at line 847 of file mxfdec.c.

static void mxf_read_pixel_layout ( AVIOContext *  pb, MXFDescriptor *  descriptor  )

static

Definition at line 884 of file mxfdec.c.

Referenced by mxf_read_generic_descriptor().

static int mxf_read_generic_descriptor ( void *  arg, AVIOContext *  pb, int  tag, int  size, UID  uid, int64_t  klv_offset  )

static

Definition at line 904 of file mxfdec.c.

static int mxf_match_uid ( const UID  key, const UID  uid, int  len  )

static

Definition at line 991 of file mxfdec.c.

Referenced by mxf_get_codec_ul().

static const MXFCodecUL* mxf_get_codec_ul ( const MXFCodecUL *  uls, UID *  uid  )

static

Definition at line 1001 of file mxfdec.c.

Referenced by mxf_is_intra_only(), and mxf_parse_structural_metadata().

static void* mxf_resolve_strong_ref ( MXFContext *  mxf, UID *  strong_ref, enum MXFMetadataSetType  type  )

static

Definition at line 1011 of file mxfdec.c.

Referenced by mxf_parse_physical_source_package(), mxf_parse_structural_metadata(), mxf_resolve_essence_group_choice(), mxf_resolve_sourceclip(), and mxf_resolve_timecode_component().

static int mxf_get_sorted_table_segments ( MXFContext *  mxf, int *  nb_sorted_segments, MXFIndexTableSegment ***  sorted_segments  )

static

Definition at line 1067 of file mxfdec.c.

Referenced by mxf_compute_index_tables().

static int mxf_absolute_bodysid_offset ( MXFContext *  mxf, int  body_sid, int64_t  offset, int64_t *  offset_out  )

static

Computes the absolute file offset of the given essence container offset.

Definition at line 1135 of file mxfdec.c.

Referenced by mxf_edit_unit_absolute_offset().

static int64_t mxf_essence_container_end ( MXFContext *  mxf, int  body_sid  )

static

Returns the end position of the essence container with given BodySID, or zero if unknown.

Definition at line 1164 of file mxfdec.c.

Referenced by mxf_read_packet().

static int mxf_edit_unit_absolute_offset ( MXFContext *  mxf, MXFIndexTable *  index_table, int64_t  edit_unit, int64_t *  edit_unit_out, int64_t *  offset_out, int  nag  )

static

Definition at line 1185 of file mxfdec.c.

Referenced by mxf_read_packet(), mxf_read_seek(), and mxf_set_current_edit_unit().

static int mxf_compute_ptses_fake_index ( MXFContext *  mxf, MXFIndexTable *  index_table  )

static

We have this:

x TemporalOffset 0: 0 1: 1 2: 1 3: -2 4: 1 5: 1 6: -2

We want to transform it into this:

x DTS PTS 0: -1 0 1: 0 3 2: 1 1 3: 2 2 4: 3 6 5: 4 4 6: 5 5

We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses, then settings mxf->first_dts = -max(TemporalOffset[x]). The latter makes DTS <= PTS.

Definition at line 1233 of file mxfdec.c.

Referenced by mxf_compute_index_tables().

static int mxf_compute_index_tables ( MXFContext *  mxf )

static

Sorts and collects index table segments into index tables.

Also computes PTSes if possible.

Definition at line 1338 of file mxfdec.c.

Referenced by mxf_read_header().

static int mxf_is_intra_only ( MXFDescriptor *  descriptor )

static

Definition at line 1430 of file mxfdec.c.

Referenced by mxf_parse_structural_metadata().

static int mxf_uid_to_str ( UID  uid, char **  str  )

static

Definition at line 1438 of file mxfdec.c.

Referenced by mxf_add_uid_metadata().

static int mxf_add_uid_metadata ( AVDictionary **  pm, const char *  key, UID  uid  )

static

Definition at line 1456 of file mxfdec.c.

Referenced by mxf_parse_physical_source_package(), and mxf_parse_structural_metadata().

static int mxf_add_timecode_metadata ( AVDictionary **  pm, const char *  key, AVTimecode *  tc  )

static

Definition at line 1466 of file mxfdec.c.

Referenced by mxf_parse_physical_source_package(), and mxf_parse_structural_metadata().

static MXFTimecodeComponent* mxf_resolve_timecode_component ( MXFContext *  mxf, UID *  strong_ref  )

static

Definition at line 1474 of file mxfdec.c.

Referenced by mxf_parse_physical_source_package().

static MXFPackage* mxf_resolve_source_package ( MXFContext *  mxf, UID  package_uid  )

static

Definition at line 1495 of file mxfdec.c.

Referenced by mxf_parse_physical_source_package(), mxf_parse_structural_metadata(), and mxf_resolve_essence_group_choice().

static MXFStructuralComponent* mxf_resolve_essence_group_choice ( MXFContext *  mxf, MXFEssenceGroup *  essence_group  )

static

Definition at line 1511 of file mxfdec.c.

Referenced by mxf_resolve_sourceclip().

static MXFStructuralComponent* mxf_resolve_sourceclip ( MXFContext *  mxf, UID *  strong_ref  )

static

Definition at line 1542 of file mxfdec.c.

Referenced by mxf_parse_structural_metadata().

static int mxf_parse_physical_source_package ( MXFContext *  mxf, MXFTrack *  source_track, AVStream *  st  )

static

Definition at line 1560 of file mxfdec.c.

Referenced by mxf_parse_structural_metadata().

static int mxf_parse_structural_metadata ( MXFContext *  mxf )

static

Definition at line 1620 of file mxfdec.c.

Referenced by mxf_read_header().

static int mxf_timestamp_to_str ( uint64_t  timestamp, char **  str  )

static

Definition at line 1956 of file mxfdec.c.

static int mxf_read_identification_metadata ( void *  arg, AVIOContext *  pb, int  tag, int  size, UID  _uid, int64_t  klv_offset  )

static

Definition at line 2004 of file mxfdec.c.

static int mxf_metadataset_init ( MXFMetadataSet *  ctx, enum MXFMetadataSetType  type  )

static

Definition at line 2079 of file mxfdec.c.

Referenced by mxf_read_local_tags().

static int mxf_read_local_tags ( MXFContext *  mxf, KLVPacket *  klv, MXFMetadataReadFunc *  read_child, int  ctx_size, enum MXFMetadataSetType  type  )

static

Definition at line 2093 of file mxfdec.c.

Referenced by mxf_parse_klv().

static int mxf_is_partition_pack_key ( UID  key )

static

Matches any partition pack key, in other words:

• HeaderPartition
• BodyPartition
• FooterPartition

  Returns

  non-zero if the key is a partition pack key, zero otherwise

Definition at line 2154 of file mxfdec.c.

Referenced by mxf_read_header(), and mxf_seek_to_previous_partition().

static int mxf_parse_klv ( MXFContext *  mxf, KLVPacket  klv, MXFMetadataReadFunc *  read, int  ctx_size, enum MXFMetadataSetType  type  )

static

Parses a metadata KLV.

Returns

<0 on error, 0 otherwise

Definition at line 2165 of file mxfdec.c.

Referenced by mxf_read_header(), and mxf_seek_to_previous_partition().

static int mxf_seek_to_previous_partition ( MXFContext *  mxf )

static

Seeks to the previous partition and parses it, if possible.

Returns

<= 0 if we should stop parsing, > 0 if we should keep going

Definition at line 2196 of file mxfdec.c.

Referenced by mxf_parse_handle_essence(), and mxf_parse_handle_partition_or_eof().

static int mxf_parse_handle_essence ( MXFContext *  mxf )

static

Called when essence is encountered.

Returns

<= 0 if we should stop parsing, > 0 if we should keep going

Definition at line 2247 of file mxfdec.c.

Referenced by mxf_read_header().

static int mxf_parse_handle_partition_or_eof ( MXFContext *  mxf )

static

Called when the next partition or EOF is encountered.

Returns

<= 0 if we should stop parsing, > 0 if we should keep going

Definition at line 2290 of file mxfdec.c.

Referenced by mxf_read_header().

static void mxf_compute_essence_containers ( MXFContext *  mxf )

static

Figures out the proper offset and length of the essence container in each partition.

Definition at line 2298 of file mxfdec.c.

Referenced by mxf_read_header().

static int64_t round_to_kag ( int64_t  position, int  kag_size  )

static

Definition at line 2328 of file mxfdec.c.

Referenced by mxf_read_header().

static int is_pcm ( enum AVCodecID  codec_id )

static

Definition at line 2336 of file mxfdec.c.

Referenced by mxf_handle_small_eubc().

static void mxf_handle_small_eubc ( AVFormatContext *  s )

static

Deal with the case where for some audio atoms EditUnitByteCount is very small (2, 4..).

In those cases we should read more than one sample per call to mxf_read_packet().

Definition at line 2347 of file mxfdec.c.

Referenced by mxf_read_header().

static void mxf_read_random_index_pack ( AVFormatContext *  s )

static

Definition at line 2372 of file mxfdec.c.

Referenced by mxf_read_header().

static int mxf_read_header ( AVFormatContext *  s )

static

Definition at line 2423 of file mxfdec.c.

static int64_t mxf_set_current_edit_unit ( MXFContext *  mxf, int64_t  current_offset  )

static

Sets mxf->current_edit_unit based on what offset we're currently at.

Returns

next_ofs if OK, <0 on error

Definition at line 2559 of file mxfdec.c.

Referenced by mxf_read_packet_old().

static int mxf_compute_sample_count ( MXFContext *  mxf, int  stream_index, uint64_t *  sample_count  )

static

Definition at line 2596 of file mxfdec.c.

Referenced by mxf_read_seek().

static int mxf_set_audio_pts ( MXFContext *  mxf, AVCodecContext *  codec, AVPacket *  pkt  )

static

Definition at line 2637 of file mxfdec.c.

Referenced by mxf_read_packet(), and mxf_read_packet_old().

static int mxf_read_packet_old ( AVFormatContext *  s, AVPacket *  pkt  )

static

Definition at line 2656 of file mxfdec.c.

Referenced by mxf_read_packet().

static int mxf_read_packet ( AVFormatContext *  s, AVPacket *  pkt  )

static

Definition at line 2756 of file mxfdec.c.

static int mxf_probe ( AVProbeData *  p )

static

Definition at line 2875 of file mxfdec.c.

static int mxf_read_seek ( AVFormatContext *  s, int  stream_index, int64_t  sample_time, int  flags  )

static

Definition at line 2902 of file mxfdec.c.

Variable Documentation

const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 }

static

Definition at line 271 of file mxfdec.c.

Referenced by mxf_is_partition_pack_key(), mxf_probe(), and mxf_read_header().

const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 }

static

Definition at line 272 of file mxfdec.c.

Referenced by mxf_decrypt_triplet(), mxf_get_stream_index(), mxf_read_header(), and mxf_read_packet_old().

const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 }

static

Definition at line 273 of file mxfdec.c.

Referenced by mxf_read_header(), and mxf_read_packet_old().

const uint8_t mxf_system_item_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x03,0x01,0x04 }

static

Definition at line 274 of file mxfdec.c.

Referenced by mxf_read_header().

const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 }

static

Definition at line 275 of file mxfdec.c.

Referenced by klv_read_packet().

const uint8_t mxf_crypto_source_container_ul[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x09,0x06,0x01,0x01,0x02,0x02,0x00,0x00,0x00 }

static

Definition at line 277 of file mxfdec.c.

Referenced by mxf_read_cryptographic_context().

const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 }

static

Definition at line 278 of file mxfdec.c.

Referenced by mxf_read_header(), and mxf_read_packet_old().

const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 }

static

Definition at line 279 of file mxfdec.c.

Referenced by mxf_parse_structural_metadata().

const uint8_t mxf_random_index_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x11,0x01,0x00 }

static

Definition at line 280 of file mxfdec.c.

Referenced by mxf_read_random_index_pack().

const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 }

static

Definition at line 281 of file mxfdec.c.

Referenced by mxf_read_generic_descriptor().

const MXFCodecUL mxf_picture_essence_container_uls[]

static

Initial value:

= {
    
    { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, AV_CODEC_ID_MPEG2VIDEO }, 
    { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14,    AV_CODEC_ID_DVVIDEO }, 
    { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14,   AV_CODEC_ID_RAWVIDEO }, 
    { { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0xff,0x4b,0x46,0x41,0x41,0x00,0x0d,0x4d,0x4f }, 14,   AV_CODEC_ID_RAWVIDEO }, 
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  0,      AV_CODEC_ID_NONE },
}

Definition at line 1026 of file mxfdec.c.

const MXFCodecUL mxf_intra_only_essence_container_uls[]

static

Initial value:

= {
    { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x01,0x00,0x00 }, 14, AV_CODEC_ID_MPEG2VIDEO }, 
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  0,       AV_CODEC_ID_NONE },
}

Definition at line 1036 of file mxfdec.c.

const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[]

static

Initial value:

= {
    { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x00,0x00 }, 14,       AV_CODEC_ID_H264 }, 
    { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14,   AV_CODEC_ID_JPEG2000 }, 
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  0,       AV_CODEC_ID_NONE },
}

Definition at line 1042 of file mxfdec.c.

const MXFCodecUL mxf_sound_essence_container_uls[]

static

Initial value:

= {
    
    { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, AV_CODEC_ID_PCM_S16LE }, 
    { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14,       AV_CODEC_ID_MP2 }, 
    { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, 14, AV_CODEC_ID_PCM_S16LE }, 
    { { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0xff,0x4b,0x46,0x41,0x41,0x00,0x0d,0x4d,0x4F }, 14, AV_CODEC_ID_PCM_S16LE }, 
    { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x03,0x04,0x02,0x02,0x02,0x03,0x03,0x01,0x00 }, 14,       AV_CODEC_ID_AAC }, 
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  0,      AV_CODEC_ID_NONE },
}

Definition at line 1048 of file mxfdec.c.

const MXFCodecUL mxf_data_essence_container_uls[]

static

Initial value:

= {
    { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x0e,0x00,0x00 }, 16, 0 },
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  0, AV_CODEC_ID_NONE },
}

Definition at line 1058 of file mxfdec.c.

const char* const mxf_data_essence_descriptor[]

static

Initial value:

= {
    "vbi_vanc_smpte_436M",
}

Definition at line 1063 of file mxfdec.c.

const MXFMetadataReadTableEntry mxf_metadata_read_table[]

static

Definition at line 2041 of file mxfdec.c.

AVInputFormat ff_mxf_demuxer

Initial value:

= {
    .name           = "mxf",
    .long_name      = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
    .priv_data_size = sizeof(MXFContext),
    .read_probe     = mxf_probe,
    .read_header    = mxf_read_header,
    .read_packet    = mxf_read_packet,
    .read_close     = mxf_read_close,
    .read_seek      = mxf_read_seek,
}

Definition at line 2971 of file mxfdec.c.