Hi,
I fixed the bugs and modified some structs according to the former reviews,
and test the code by valgrind and elminated the mem leaks.
here is new version attached below.
thanks.
--
Best wishes~
/*
* MXF muxer
* Copyright (c) 2008 GUCAS, Zhentan Feng<spyfeng at gmail dot com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* References
* SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
* SMPTE 377M MXF File Format Specifications
* SMPTE 379M MXF Generic Container
* SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
* SMPTE RP210: SMPTE Metadata Dictionary
* SMPTE RP224: Registry of SMPTE Universal Labels
*/
#define DEBUG
#include "libavutil/random.h"
#include "avformat.h"
#include "libavcodec/bytestream.h"
typedef uint8_t UID[16];
typedef uint8_t UMID[32];
enum MXFMetadataSetType {
MaterialPackage,
SourcePackage,
};
typedef struct {
UID key;
offset_t offset;
uint64_t length;
} KLVPacket;
typedef struct {
UID uid;
unsigned matching_len;
enum CodecID id;
} MXFCodecUL;
typedef struct {
int local_tag;
UID uid;
} MXFLocalTagPair;
typedef struct {
UID uid;
enum CodecType type;
} MXFDataDefinitionUL;
typedef struct {
UID uid;
enum CodecID type;
} MXFEssenceElementKey;
typedef struct {
UID *identification;
UID *content_storage;
UID **package;
UID **track;
UID *mul_desc;
UID **sub_desc;
} MXFReferenceContext;
typedef struct {
UID track_essence_element_key;
UID *sequence_refs;
UID *structural_component_refs;
} MXFStreamContext;
typedef struct MXFContext {
UMID top_src_package_uid;
int64_t header_byte_count;
int64_t header_byte_count_offset;
int64_t header_footer_partition_offset;
unsigned int random_state;
MXFReferenceContext reference;
int essence_container_count;
UID *essence_container_uls;
} MXFContext;
typedef struct {
const UID key;
int (*write)();
enum CodecType type;
} MXFDescriptorWriteTableEntry;
static const uint8_t umid_base[] = {
0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x0F,0x00,0x13,0x00,0x00,0x00
};
/**
* complete key for operation pattern, partitions, and primer pack
*/
static const uint8_t op1a_ul[] = {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x01,0x00
};
static const uint8_t header_partition_key[] = {
0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x02,0x04,0x00
}; // ClosedComplete
static const uint8_t footer_partition_key[] = {
0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x04,0x04,0x00
}; // ClosedComplete
static const uint8_t primer_pack_key[] = {
0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x05,0x01,0x00
};
/**
* partial key for header metadata
*/
static const uint8_t header_metadata_key[] = {
0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01 };
static const MXFEssenceElementKey mxf_essence_element_key[] = {
{ {
0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00
}, CODEC_ID_MPEG2VIDEO},
{ {
0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00
}, CODEC_ID_PCM_S16LE},
{ {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
}, CODEC_ID_NONE},
};
/**
* SMPTE RP224 http://www.smpte-ra.org/mdd/index.html
*/
static const MXFDataDefinitionUL mxf_data_definition_uls[] = {
{ {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x01,0x00,0x00,0x00
}, CODEC_TYPE_VIDEO },
{ {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x02,0x00,0x00,0x00
}, CODEC_TYPE_AUDIO },
{ {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x05,0x01,0x03,0x02,0x02,0x02,0x02,0x00,0x00
}, CODEC_TYPE_AUDIO },
{ {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
}, CODEC_TYPE_DATA },
};
static const MXFCodecUL mxf_codec_uls[] = {
/* PictureEssenceCoding */
{ {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00
}, 14, CODEC_ID_MPEG2VIDEO }, /* [EMAIL PROTECTED] Long GoP */
{ {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01
}, 14, CODEC_ID_MPEG2VIDEO }, /* D-10 50Mbps PAL */
{ {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00
}, 14, CODEC_ID_MPEG2VIDEO }, /* [EMAIL PROTECTED] Long GoP */
{ {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00
}, 14, CODEC_ID_MPEG2VIDEO }, /* [EMAIL PROTECTED] I-Frame */
{ {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x03
}, 14, CODEC_ID_MPEG4 }, /* XDCAM proxy_pal030926.mxf */
{ {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x01,0x02,0x00
}, 13, CODEC_ID_DVVIDEO }, /* DV25 IEC PAL */
{ {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00
}, 14, CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
{ {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x01,0x7F,0x00,0x00,0x00
}, 13, CODEC_ID_RAWVIDEO }, /* Uncompressed */
/* SoundEssenceCompression */
{ {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00
}, 13, CODEC_ID_PCM_S16LE }, /* Uncompressed */
{ {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x7F,0x00,0x00,0x00
}, 13, CODEC_ID_PCM_S16LE },
{ {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x02,0x02,0x01,0x7E,0x00,0x00,0x00
}, 13, CODEC_ID_PCM_S16BE }, /* From Omneon MXF file */
{ {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x04,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00
}, 15, CODEC_ID_PCM_ALAW }, /* XDCAM Proxy C0023S01.mxf */
{ {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x01,0x00
}, 15, CODEC_ID_AC3 },
{ {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x05,0x00
}, 15, CODEC_ID_MP2 }, /* MP2 or MP3 */
//{ {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x1C,0x00
}, 15, CODEC_ID_DOLBY_E }, /* Dolby-E */
{ {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
}, 0, CODEC_ID_NONE },
};
static const uint8_t multiple_desc_ul[] = {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x0D,0x01,0x03,0x01,0x02,0x7F,0x01,0x00
};
static const MXFCodecUL mxf_essence_container_uls[] = {
// picture essence container
{ {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01
}, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
// { {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01
}, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
// audio essence conatiner uls
{ {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00
}, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
// { {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01
}, 14, CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
// { {
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01
}, 14, CODEC_ID_PCM_S16LE }, /* D-10 Mapping 50Mbps PAL Extended Template */
{ {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
}, 0, CODEC_ID_NONE },
};
/**
* SMPTE RP210 http://www.smpte-ra.org/mdd/index.html
*/
static const MXFLocalTagPair mxf_local_tag_batch[] = {
// preface set
{ 0x3C0A,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}},
/* Instance UID */
{ 0x3B02,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}},
/* Last Modified Date */
{ 0x3B05,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}},
/* Version */
{ 0x3B06,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}},
/* Identifications reference */
{ 0x3B03,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}},
/* Content Storage reference */
{ 0x3B09,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}},
/* Operational Pattern UL */
{ 0x3B0A,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}},
/* Essence Containers UL batch */
{ 0x3B0B,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}},
/* DM Schemes UL batch */
// Identification
{ 0x3C09,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}},
/* This Generation UID */
{ 0x3C01,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}},
/* Company Name */
{ 0x3C02,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}},
/* Product Name */
{ 0x3C04,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x04,0x00,0x00,0x00}},
/* Version String */
{ 0x3C05,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}},
/* Product ID */
{ 0x3C06,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}},
/* Modification Date */
// Content Storage
{ 0x1901,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}},
/* Package strong reference batch */
// Essence Container Data
{ 0x2701,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}},
/* Linked Package UID */
{ 0x3F07,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}},
/* BodySID */
// Package
{ 0x4401,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}},
/* Package UID */
{ 0x4405,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}},
/* Package Creation Date */
{ 0x4404,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}},
/* Package Modified Date */
{ 0x4403,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}},
/* Tracks Strong reference array */
{ 0x4701,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}},
/* Descriptor */
// Track
{ 0x4801,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}},
/* Track ID */
{ 0x4804,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x03,0x00,0x00}},
/* Track Numberr */
{ 0x4B01,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}},
/* Edit Rate */
{ 0x4B02,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}},
/* Origin */
{ 0x4803,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}},
/* Sequence reference */
// Sequence
{ 0x0201,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}},
/* Data Definition UL */
{ 0x0202,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}},
/* Duration */
{ 0x1001,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}},
/* Structural Components reference array */
// Source Clip
{ 0x1201,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}},
/* Start position */
{ 0x1101,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}},
/* SourcePackageID */
{ 0x1102,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}},
/* SourceTrackID */
// file descriptor
{ 0x3F01,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}},
/* sub descriptor uid*/
{ 0x3006,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}},
/* Linked Track ID */
{ 0x3004,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}},
/* essence container ul */
// generic picture eseence descriptor
{ 0x3203,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}},
/* stored width */
{ 0x3202,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}},
/* stored heigth */
{ 0x320E,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}},
/* aspect ratio*/
{ 0x3201,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}},
/* picture essence coding*/
// generic picture sound essence descriptor
{ 0x3D03,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}},
/* audio sampling rate */
{ 0x3D07,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}},
/* channel count */
{ 0x3D01,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}},
/* quantization bits */
{ 0x3D06,
{0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}},
/* sound essence compression */
};
#define PRINT_KEY(pc, s, x) dprintf(pc, "%s %02X %02X %02X %02X %02X %02X %02X
%02X %02X %02X %02X %02X %02X %02X %02X %02X\n", s, \
(x)[0], (x)[1], (x)[2], (x)[3], (x)[4], (x)[5],
(x)[6], (x)[7], (x)[8], (x)[9], (x)[10], (x)[11], (x)[12], (x)[13], (x)[14],
(x)[15])
static void mxf_generate_uuid(AVFormatContext *s, UID uuid)
{
MXFContext *mxf = s->priv_data;
int i;
for (i = 0; i < 16; i++) {
mxf->random_state= mxf->random_state*1664525+10139042;
uuid[i]= mxf->random_state>>24;
}
// the 7th byte is version according to ISO 11578
uuid[6] &= 0x0f;
uuid[6] |= 0x40;
// the 8th byte is variant for current use according to ISO 11578
uuid[8] &= 0x3f;
uuid[8] |= 0x80;
}
static void mxf_generate_umid(AVFormatContext *s, UMID umid)
{
memcpy(umid, umid_base, 16);
mxf_generate_uuid(s, umid + 16);
}
static int mxf_generate_reference(AVFormatContext *s, UID **refs, int ref_count)
{
int i;
UID *p;
*refs = av_mallocz(ref_count * sizeof(UID));
if (!*refs)
return AVERROR(ENOMEM);
p = *refs;
for (i = 0; i < ref_count; i++) {
mxf_generate_uuid(s, *p);
p ++;
}
return 0;
}
static int klv_encode_ber_length(ByteIOContext *pb, uint64_t len)
{
// Determine the best BER size
int size = 0;
uint64_t tmp = len;
if (len < 128) {
//short form
put_byte(pb, len);
return 1;
}
while (tmp) {
tmp >>= 8;
size ++;
}
// long form
put_byte(pb, 0x80 + size);
while(size) {
size --;
put_byte(pb, len >> 8 * size & 0xff);
}
return 0;
}
static const MXFCodecUL *mxf_get_essence_container_ul(enum CodecID type)
{
const MXFCodecUL *uls = mxf_essence_container_uls;
while (uls->id != CODEC_ID_NONE) {
if (uls->id == type)
break;
uls++;
}
return uls;
}
static int mxf_write_primer_pack(AVFormatContext *s)
{
ByteIOContext *pb = s->pb;
const MXFLocalTagPair *local_tag_batch;
int local_tag_number, i = 0;
local_tag_number = sizeof(mxf_local_tag_batch) / sizeof(MXFLocalTagPair);
put_buffer(pb, primer_pack_key, 16);
klv_encode_ber_length(pb, local_tag_number * 18 + 8);
put_be32(pb, local_tag_number); // local_tag num
put_be32(pb, 18); // item size, always 18 according to the specs
for (local_tag_batch = mxf_local_tag_batch; i < local_tag_number;
local_tag_batch++, i++) {
put_be16(pb, local_tag_batch->local_tag);
put_buffer(pb, local_tag_batch->uid, 16);
}
return 0;
}
static void mxf_write_local_tag(ByteIOContext *pb, int value_size, int tag)
{
put_be16(pb, tag);
put_be16(pb, value_size);
}
static void mxf_write_reference(ByteIOContext *pb, int ref_count, UID value)
{
put_be32(pb, ref_count);
put_be32(pb, 16);
put_buffer(pb, value, sizeof(UID) * ref_count);
}
static void mxf_free(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
AVStream *st;
int i;
av_freep(&mxf->reference.identification);
av_freep(mxf->reference.package);
av_freep(&mxf->reference.package);
av_freep(&mxf->reference.content_storage);
for (i = 0; i < s->nb_streams; i++) {
st = s->streams[i];
av_freep(&st->priv_data);
}
av_freep(mxf->reference.sub_desc);
av_freep(&mxf->reference.sub_desc);
av_freep(&mxf->reference.mul_desc);
av_freep(&mxf->essence_container_uls);
}
static const MXFDataDefinitionUL *mxf_get_data_definition_ul(enum CodecType
type)
{
const MXFDataDefinitionUL *uls = mxf_data_definition_uls;
while (uls->type != CODEC_TYPE_DATA) {
if (type == uls->type)
break;
uls ++;
}
return uls;
}
static int mxf_write_preface(AVFormatContext *s, KLVPacket *klv)
{
MXFContext *mxf = s->priv_data;
MXFReferenceContext *refs = &mxf->reference;
UID uid;
ByteIOContext *pb = s->pb;
AV_WB24(klv->key + 13, 0x012f00);
put_buffer(pb, klv->key, 16);
klv_encode_ber_length(pb, 146);
// write preface set uid
mxf_generate_uuid(s, uid);
mxf_write_local_tag(pb, 16, 0x3C0A);
put_buffer(pb, uid, 16);
#ifdef DEBUG
PRINT_KEY(s, "preface key", klv->key);
PRINT_KEY(s, "preface uid", uid);
#endif
// write create date as unknown
mxf_write_local_tag(pb, 8, 0x3B02);
put_be64(pb, 0);
// write version
mxf_write_local_tag(pb, 2, 0x3B05);
put_be16(pb, 1);
// write identification_refs
if (mxf_generate_reference(s, &refs->identification, 1) < 0)
return -1;
mxf_write_local_tag(pb, 16 + 8, 0x3B06);
mxf_write_reference(pb, 1, *refs->identification);
// write content_storage_refs
if (mxf_generate_reference(s, &refs->content_storage, 1) < 0)
return -1;
mxf_write_local_tag(pb, 16, 0x3B03);
put_buffer(pb, *refs->content_storage, 16);
mxf_write_local_tag(pb, 16, 0x3B09);
put_buffer(pb, op1a_ul, 16);
// write essence_container_refs
mxf_write_local_tag(pb, 8 + 16 * mxf->essence_container_count, 0x3B0A);
mxf_write_reference(pb, mxf->essence_container_count,
*mxf->essence_container_uls);
// write dm_scheme_refs
mxf_write_local_tag(pb, 8, 0x3B0B);
put_be64(pb, 0);
return 0;
}
static int mxf_write_identification(AVFormatContext *s, KLVPacket *klv)
{
MXFContext *mxf = s->priv_data;
MXFReferenceContext *refs = &mxf->reference;
ByteIOContext *pb = s->pb;
UID uid;
int length, company_name_len, product_name_len, version_string_len;
AV_WB24(klv->key + 13, 0x013000);
put_buffer(pb, klv->key, 16);
company_name_len = sizeof("FFmpeg");
product_name_len = sizeof("OP1a Muxer");
length = 80 + company_name_len + product_name_len;
if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
version_string_len = sizeof(LIBAVFORMAT_IDENT);
length += 4 + version_string_len;
}
klv_encode_ber_length(pb, length);
// write uid
mxf_write_local_tag(pb, 16, 0x3C0A);
put_buffer(pb, *refs->identification, 16);
#ifdef DEBUG
PRINT_KEY(s, "identification key", klv->key);
PRINT_KEY(s, "identification uid", *refs->identification);
#endif
// write generation uid
mxf_generate_uuid(s, uid);
mxf_write_local_tag(pb, 16, 0x3C09);
put_buffer(pb, uid, 16);
mxf_write_local_tag(pb, company_name_len, 0x3C01);
put_buffer(pb, "FFmpeg", company_name_len);
mxf_write_local_tag(pb, product_name_len, 0x3C02);
put_buffer(pb, "OP1a Muxer", product_name_len);
if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
mxf_write_local_tag(pb, version_string_len, 0x3C04);
put_buffer(pb, LIBAVFORMAT_IDENT, version_string_len);
}
// write product uid
mxf_generate_uuid(s, uid);
mxf_write_local_tag(pb, 16, 0x3C05);
put_buffer(pb, uid, 16);
// write modified date
mxf_write_local_tag(pb, 8, 0x3C06);
put_be64(pb, 0);
return 0;
}
static int mxf_write_content_storage(AVFormatContext *s, KLVPacket *klv)
{
MXFContext *mxf = s->priv_data;
MXFReferenceContext *refs = &mxf->reference;
ByteIOContext *pb = s->pb;
AV_WB24(klv->key + 13, 0x011800);
put_buffer(pb, klv->key, 16);
klv_encode_ber_length(pb, 64);
// write uid
mxf_write_local_tag(pb, 16, 0x3C0A);
put_buffer(pb, *refs->content_storage, 16);
#ifdef DEBUG
PRINT_KEY(s, "content storage key", klv->key);
PRINT_KEY(s, "content storage uid", *refs->content_storage);
#endif
// write package reference
refs->package= av_mallocz(s->nb_streams * sizeof(*refs->package));
if (!refs->package)
return AVERROR(ENOMEM);
if (mxf_generate_reference(s, refs->package, 2) < 0)
return -1;
mxf_write_local_tag(pb, 16 * 2 + 8, 0x1901);
mxf_write_reference(pb, 2, **refs->package);
return 0;
}
static int mxf_write_package(AVFormatContext *s, KLVPacket *klv, enum
MXFMetadataSetType type)
{
MXFContext *mxf = s->priv_data;
MXFReferenceContext *refs = &mxf->reference;
ByteIOContext *pb = s->pb;
UMID umid;
int i;
klv->key[13] = 0x01;
klv->key[14] = type == MaterialPackage ? 0x36 : 0x37;
klv->key[15] = 0x00;
put_buffer(pb, klv->key, 16);
if (type == MaterialPackage)
klv_encode_ber_length(pb, 92 + 16 * s->nb_streams);
else
klv_encode_ber_length(pb, 112 + 16 * s->nb_streams); // 20 bytes length
for descriptor reference
// write uid
i = type == MaterialPackage ? 0 : 1;
mxf_write_local_tag(pb, 16, 0x3C0A);
put_buffer(pb, (*refs->package)[i], 16);
#ifdef DEBUG
av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);
PRINT_KEY(s, "package", klv->key);
PRINT_KEY(s, "package uid", (*refs->package)[i]);
PRINT_KEY(s, "package umid first part", umid);
PRINT_KEY(s, "package umid second part", umid + 16);
#endif
// write package umid
mxf_write_local_tag(pb, 32, 0x4401);
if (type == MaterialPackage) {
mxf_generate_umid(s, umid);
put_buffer(pb, umid, 32);
} else {
put_buffer(pb, mxf->top_src_package_uid, 32);
}
// write create date
mxf_write_local_tag(pb, 8, 0x4405);
put_be64(pb, 0);
// write modified date
mxf_write_local_tag(pb, 8, 0x4404);
put_be64(pb, 0);
// write track refs
refs->track = av_mallocz(s->nb_streams * sizeof(*refs->track));
if (!refs->track)
return AVERROR(ENOMEM);
if (mxf_generate_reference(s, refs->track, s->nb_streams) < 0)
return -1;
mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x4403);
mxf_write_reference(pb, s->nb_streams, **refs->track);
// malloc memory for track number sign
if (type == SourcePackage) {
// write multiple descriptor reference
if (mxf_generate_reference(s, &refs->mul_desc, 1) < 0)
return -1;
mxf_write_local_tag(pb, 16, 0x4701);
put_buffer(pb, *refs->mul_desc, 16);
}
return 0;
}
static int mxf_write_track(AVFormatContext *s, KLVPacket *klv, int
stream_index, enum MXFMetadataSetType type)
{
MXFContext *mxf = s->priv_data;
MXFReferenceContext *refs = &mxf->reference;
ByteIOContext *pb = s->pb;
AVStream *st;
MXFStreamContext *sc;
const MXFEssenceElementKey *element;
int i = 0;
int
track_number_sign[sizeof(mxf_essence_element_key)/sizeof(MXFEssenceElementKey)]
= { 0 };
AV_WB24(klv->key + 13, 0x013b00);
put_buffer(pb, klv->key, 16);
klv_encode_ber_length(pb, 80);
st = s->streams[stream_index];
sc = st->priv_data;
// write track uid
mxf_write_local_tag(pb, 16, 0x3C0A);
put_buffer(pb, (*refs->track)[stream_index], 16);
#ifdef DEBUG
PRINT_KEY(s, "track key", klv->key);
PRINT_KEY(s, "track uid", (*refs->track)[stream_index]);
#endif
// write track id
mxf_write_local_tag(pb, 4, 0x4801);
put_be32(pb, stream_index);
mxf_write_local_tag(pb, 4, 0x4804);
if (type != MaterialPackage) {
for (element = mxf_essence_element_key; element->type != CODEC_ID_NONE;
element++) {
if (st->codec->codec_id== element->type) {
// write track number
put_buffer(pb, element->uid + 12, 3);
put_byte(pb, element->uid[15] + track_number_sign[i]);
track_number_sign[i] ++;
// set essence_element key
memcpy(sc->track_essence_element_key, element->uid, 16);
break;
}
i++;
}
} else {
put_be32(pb, 0); // track number of material package is 0
}
mxf_write_local_tag(pb, 8, 0x4B01);
put_be32(pb, st->time_base.den);
put_be32(pb, st->time_base.num);
// write origin
mxf_write_local_tag(pb, 8, 0x4B02);
put_be64(pb, 0);
// write sequence refs
if (mxf_generate_reference(s, &sc->sequence_refs, 1) < 0)
return -1;
mxf_write_local_tag(pb, 16, 0x4803);
put_buffer(pb, *sc->sequence_refs, 16);
return 0;
}
static int mxf_write_sequence(AVFormatContext *s, KLVPacket *klv, int
stream_index)
{
MXFContext *mxf = s->priv_data;
ByteIOContext *pb = s->pb;
AVStream *st;
MXFStreamContext *sc;
const MXFDataDefinitionUL * data_def_ul;
AV_WB24(klv->key + 13, 0x010f00);
put_buffer(pb, klv->key, 16);
klv_encode_ber_length(pb, 80);
st = s->streams[stream_index];
sc = st->priv_data;
mxf_write_local_tag(pb, 16, 0x3C0A);
put_buffer(pb, *sc->sequence_refs, 16);
#ifdef DEBUG
PRINT_KEY(s, "sequence key", klv->key);
PRINT_KEY(s, "sequence uid", *sc->sequence_refs);
#endif
// find data define uls
data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);
mxf_write_local_tag(pb, 16, 0x0201);
put_buffer(pb, data_def_ul->uid, 16);
mxf_write_local_tag(pb, 8, 0x0202);
put_be64(pb, st->duration);
// write structural component
if (mxf_generate_reference(s, &sc->structural_component_refs, 1) < 0)
return -1;
mxf_write_local_tag(pb, 16 + 8, 0x1001);
mxf_write_reference(pb, 1, *sc->structural_component_refs);
return 0;
}
static int mxf_write_structural_component(AVFormatContext *s, KLVPacket *klv,
int stream_index, enum MXFMetadataSetType type)
{
MXFContext *mxf = s->priv_data;
ByteIOContext *pb = s->pb;
AVStream *st;
MXFStreamContext *sc;
const MXFDataDefinitionUL * data_def_ul;
int i;
AV_WB24(klv->key + 13, 0x011100);
put_buffer(pb, klv->key, 16);
klv_encode_ber_length(pb, 108);
st = s->streams[stream_index];
sc= st->priv_data;
// write uid
mxf_write_local_tag(pb, 16, 0x3C0A);
put_buffer(pb, *sc->structural_component_refs, 16);
#ifdef DEBUG
PRINT_KEY(s, "structural component key", klv->key);
PRINT_KEY(s, "structural component uid", *sc->structural_component_refs);
#endif
data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);
mxf_write_local_tag(pb, 16, 0x0201);
put_buffer(pb, data_def_ul->uid, 16);
// write start_position
mxf_write_local_tag(pb, 8, 0x1201);
put_be64(pb, 0);
// write duration
mxf_write_local_tag(pb, 8, 0x0202);
put_be64(pb, st->duration);
if (type == SourcePackage) {
// write source package uid, end of the reference
mxf_write_local_tag(pb, 32, 0x1101);
for (i = 0; i < 4; i++) {
put_be64(pb, 0);
}
// write source track id
mxf_write_local_tag(pb, 4, 0x1102);
put_be32(pb, 0);
} else {
mxf_write_local_tag(pb, 32, 0x1101);
put_buffer(pb, mxf->top_src_package_uid, 32);
mxf_write_local_tag(pb, 4, 0x1102);
put_be32(pb, stream_index);
}
return 0;
}
static int mxf_write_multi_descriptor(AVFormatContext *s, KLVPacket *klv)
{
MXFContext *mxf = s->priv_data;
MXFReferenceContext *refs = &mxf->reference;
ByteIOContext *pb = s->pb;
AV_WB24(klv->key + 13, 0x014400);
put_buffer(pb, klv->key, 16);
klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);
mxf_write_local_tag(pb, 16, 0x3C0A);
put_buffer(pb, *refs->mul_desc, 16);
#ifdef DEBUG
PRINT_KEY(s, "multi_desc uid", *refs->mul_desc);
#endif
// write sample rate
// SMPTE377M D.1 says this field is necessary,
// but mxf.c actually do not read the field,so we set 0 as default.
mxf_write_local_tag(pb, 8, 0x3001);
put_be64(pb, 0);
// write essence container ul
mxf_write_local_tag(pb, 16, 0x3004);
put_buffer(pb, multiple_desc_ul, 16);
// write sub descriptor refs
refs->sub_desc= av_mallocz(s->nb_streams * sizeof(*refs->sub_desc));
if (!refs->sub_desc)
return AVERROR(ENOMEM);
if (mxf_generate_reference(s, refs->sub_desc, s->nb_streams) < 0)
return -1;
mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x3F01);
mxf_write_reference(pb, s->nb_streams, **refs->sub_desc);
return 0;
}
static int mxf_write_mpeg_video_desc(AVFormatContext *s, const
MXFDescriptorWriteTableEntry *desc_tbl, int stream_index)
{
MXFContext *mxf = s->priv_data;
MXFReferenceContext *refs = &mxf->reference;
ByteIOContext *pb = s->pb;
AVStream *st;
const MXFCodecUL *codec_ul = NULL;
st = s->streams[stream_index];
put_buffer(pb, desc_tbl->key, 16);
klv_encode_ber_length(pb, 96);
mxf_write_local_tag(pb, 16, 0x3C0A);
put_buffer(pb, (*refs->sub_desc)[stream_index], 16);
mxf_write_local_tag(pb, 4, 0x3006);
put_be32(pb, stream_index);
#ifdef DEBUG
PRINT_KEY(s, "mpeg2video uid", (*refs->track)[stream_index]);
av_log(s, AV_LOG_DEBUG, "linked track ID:%d\n", stream_index);
#endif
codec_ul = mxf_get_essence_container_ul(st->codec->codec_id);
mxf_write_local_tag(pb, 16, 0x3004);
put_buffer(pb, codec_ul->uid, 16);
mxf_write_local_tag(pb, 4, 0x3203);
put_be32(pb, st->codec->width);
mxf_write_local_tag(pb, 4, 0x3202);
put_be32(pb, st->codec->height);
mxf_write_local_tag(pb, 8, 0x320E);
put_be32(pb, st->time_base.den);
put_be32(pb, st->time_base.num);
// tmp write, will modified later
mxf_write_local_tag(pb, 16, 0x3201);
put_buffer(pb, mxf_codec_uls->uid, 16);
return 0;
}
static int mxf_write_wav_desc(AVFormatContext *s, const
MXFDescriptorWriteTableEntry *desc_tbl, int stream_index)
{
MXFContext *mxf = s->priv_data;
MXFReferenceContext *refs = &mxf->reference;
ByteIOContext *pb = s->pb;
AVStream *st;
const MXFCodecUL *codec_ul = NULL;
st = s->streams[stream_index];
put_buffer(pb, desc_tbl->key, 16);
klv_encode_ber_length(pb, 96);
mxf_write_local_tag(pb, 16, 0x3C0A);
put_buffer(pb, (*refs->sub_desc)[stream_index], 16);
mxf_write_local_tag(pb, 4, 0x3006);
put_be32(pb, stream_index);
#ifdef DEBUG
PRINT_KEY(s, "wav desc uid", (*refs->track)[stream_index]);
#endif
codec_ul = mxf_get_essence_container_ul(st->codec->codec_id);
mxf_write_local_tag(pb, 16, 0x3004);
put_buffer(pb, codec_ul->uid, 16);
// write audio sampling rate
mxf_write_local_tag(pb, 8, 0x3D03);
put_be32(pb, st->codec->sample_rate);
put_be32(pb, 1);
mxf_write_local_tag(pb, 4, 0x3D07);
put_be32(pb, st->codec->channels);
mxf_write_local_tag(pb, 4, 0x3D01);
put_be32(pb, st->codec->bits_per_sample);
// tmp write, will modified later
mxf_write_local_tag(pb, 16, 0x3201);
put_buffer(pb, (mxf_codec_uls + 8) ->uid, 16);
return 0;
}
static const MXFDescriptorWriteTableEntry mxf_descriptor_read_table[] = {
{ {
0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00
}, mxf_write_mpeg_video_desc, CODEC_ID_MPEG2VIDEO},
{ {
0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00
}, mxf_write_wav_desc, CODEC_ID_PCM_S16LE},
{ {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
}, NULL, CODEC_ID_NONE},
};
static int mxf_build_structural_metadata(AVFormatContext *s, KLVPacket* klv,
enum MXFMetadataSetType type)
{
MXFContext *mxf = s->priv_data;
MXFReferenceContext *refs = &mxf->reference;
MXFStreamContext *sc;
int i, ret;
const MXFDescriptorWriteTableEntry *desc = NULL;
if (mxf_write_package(s, klv, type) < 0)
return -1;
if (type == SourcePackage) {
if (mxf_write_multi_descriptor(s, klv) < 0)
return -1;
}
for (i = 0;i < s->nb_streams; i++) {
ret = mxf_write_track(s, klv, i, type);
if ( ret < 0)
goto fail;
ret = mxf_write_sequence(s, klv, i);
if ( ret < 0)
goto fail;
ret = mxf_write_structural_component(s, klv, i, type);
if ( ret < 0)
goto fail;
if (type == SourcePackage) {
for (desc = mxf_descriptor_read_table; desc->write; desc++) {
if (s->streams[i]->codec->codec_id == desc->type) {
ret = desc->write(s, desc, i);
if ( ret < 0) {
av_log(s, AV_LOG_ERROR, "error writing descriptor\n");
goto fail;
}
break;
}
}
}
}
fail:
for (i = 0; i < s->nb_streams; i++) {
sc = s->streams[i]->priv_data;
av_freep(&sc->structural_component_refs);
av_freep(&sc->sequence_refs);
}
av_freep(refs->track);
av_freep(&refs->track);
return ret;
}
static int mxf_write_header_metadata_sets(AVFormatContext *s)
{
AVStream *st;
MXFStreamContext *sc = NULL;
KLVPacket klv;
int i;
memcpy(klv.key, header_metadata_key, 13);
if (mxf_write_preface(s, &klv) < 0)
return -1;
if (mxf_write_identification(s,&klv) < 0)
return -1;
if (mxf_write_content_storage(s, &klv) < 0)
return -1;
for (i = 0; i < s->nb_streams; i++) {
st = s->streams[i];
sc = av_mallocz(sizeof(MXFStreamContext));
if (!sc)
return AVERROR(ENOMEM);
st->priv_data = sc;
// set pts information
if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
av_set_pts_info(st, 64, 1, st->codec->time_base.den);
} else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
av_set_pts_info(st, 64, 1, st->codec->sample_rate);
}
}
if (mxf_build_structural_metadata(s, &klv, MaterialPackage) < 0)
return -1;
if (mxf_build_structural_metadata(s, &klv, SourcePackage) < 0)
return -1;
return 0;
}
static int mxf_add_essence_container_ul(MXFContext *mxf, const MXFCodecUL
*codec_ul)
{
mxf->essence_container_uls = av_realloc(mxf->essence_container_uls,
(mxf->essence_container_count + 1) * 16);
if (!mxf->essence_container_uls)
return AVERROR(ENOMEM);
memcpy(mxf->essence_container_uls[mxf->essence_container_count],
codec_ul->uid, 16);
mxf->essence_container_count++;
return mxf->essence_container_count;
}
static int mxf_build_essence_container_refs(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
AVStream *st;
int i;
const MXFCodecUL *codec_ul = NULL;
for (codec_ul = mxf_essence_container_uls; codec_ul->id; codec_ul++) {
for (i = 0; i < s->nb_streams; i++) {
st = s->streams[i];
if (st->codec->codec_id == codec_ul->id) {
if (mxf_add_essence_container_ul(mxf, codec_ul) < 0 )
return -1;
break;
}
}
}
return 0;
}
static void mxf_write_partition(AVFormatContext *s, int64_t this_partition, int
bodysid, const uint8_t *key)
{
MXFContext *mxf = s->priv_data;
ByteIOContext *pb = s->pb;
#ifdef DEBUG
int i;
#endif
// write klv
put_buffer(pb, key, 16);
klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);
// write partition value
put_be16(pb, 1); // majorVersion
put_be16(pb, 2); // minorVersion
put_be32(pb, 1); // kagSize
put_be64(pb, this_partition); // thisPartition
put_be64(pb, 0); // previousPartition
// set offset
if (!this_partition)
mxf->header_footer_partition_offset = url_ftell(pb);
put_be64(pb, this_partition); // footerPartition,update later
// set offset
if (!this_partition)
mxf->header_byte_count_offset = url_ftell(pb);
put_be64(pb, 0); // headerByteCount, update later
// no indexTable
put_be64(pb, 0); // indexByteCount
put_be32(pb, 0); // indexSID
put_be64(pb, 0); // bodyOffset
put_be32(pb, bodysid); // bodySID
put_buffer(pb, op1a_ul, 16); // operational pattern
// essence container
mxf_write_reference(pb, mxf->essence_container_count,
*mxf->essence_container_uls);
#ifdef DEBUG
av_log(s,AV_LOG_DEBUG, "essence container count:%d\n",
mxf->essence_container_count);
for (i = 0; i < mxf->essence_container_count; i++)
PRINT_KEY(s, "essence container ul:\n", mxf->essence_container_uls[i]);
#endif
}
static int mux_write_header(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
ByteIOContext *pb = s->pb;
int64_t header_metadata_start;
// calculate the numner of essence container type
mxf_build_essence_container_refs(s);
mxf_write_partition(s, 0, 0, header_partition_key);
// generate Source Package Set UMID for op1a
// will be used by
material_package->source_track->sequence->structual_component->source_package_id
mxf_generate_umid(s, mxf->top_src_package_uid);
// mark the start of the headermetadata and calculate metadata size
header_metadata_start = url_ftell(s->pb);
mxf_write_primer_pack(s);
if (mxf_write_header_metadata_sets(s) < 0)
goto fail;
mxf->header_byte_count = url_ftell(s->pb) - header_metadata_start;
put_flush_packet(pb);
return 0;
fail:
mxf_free(s);
return -1;
}
static int mux_write_packet(AVFormatContext *s, AVPacket *pkt)
{
ByteIOContext *pb = s->pb;
AVStream *st = s->streams[pkt->stream_index];
MXFStreamContext *sc = st->priv_data;
put_buffer(pb, sc->track_essence_element_key, 16); // write key
klv_encode_ber_length(pb, pkt->size); // write length
put_buffer(pb, pkt->data, pkt->size); // write value
put_flush_packet(pb);
return 0;
}
static int mxf_update_header_partition(AVFormatContext *s, int64_t
footer_partition_offset)
{
MXFContext *mxf = s->priv_data;
ByteIOContext *pb = s->pb;
url_fseek(pb, mxf->header_byte_count_offset, SEEK_SET);
put_be64(pb, mxf->header_byte_count);
put_flush_packet(pb);
url_fseek(pb, mxf->header_footer_partition_offset, SEEK_SET);
put_be64(pb, footer_partition_offset);
put_flush_packet(pb);
return 0;
}
static int mux_write_footer(AVFormatContext *s)
{
ByteIOContext *pb = s->pb;
int64_t this_partition = url_ftell(pb);
mxf_write_partition(s, this_partition, 1, footer_partition_key);
put_flush_packet(pb);
mxf_update_header_partition(s, this_partition);
mxf_free(s);
return 0;
}
AVOutputFormat mxf_muxer = {
"mxf",
NULL_IF_CONFIG_SMALL("Material eXchange Format"),
NULL,
"mxf",
sizeof(MXFContext),
CODEC_ID_PCM_S16LE,
CODEC_ID_MPEG2VIDEO,
mux_write_header,
mux_write_packet,
mux_write_footer,
};
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