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FFmpeg/libavformat/mxfenc.c

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/*
* 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/fifo.h"
#include "mxf.h"
static const int NTSC_samples_per_frame[] = { 1602, 1601, 1602, 1601, 1602, 0 };
static const int PAL_samples_per_frame[] = { 1920, 0 };
typedef struct {
AVFifoBuffer fifo;
unsigned fifo_size; ///< current fifo size allocated
uint64_t dts; ///< current dts
int sample_size; ///< size of one sample all channels included
const int *samples_per_frame; ///< must be 0 terminated
const int *samples; ///< current samples per frame, pointer to samples_per_frame
} AudioInterleaveContext;
typedef struct {
int local_tag;
UID uid;
} MXFLocalTagPair;
typedef struct {
AudioInterleaveContext aic;
UID track_essence_element_key;
int index; //<<< index in mxf_essence_container_uls table
const UID *codec_ul;
int64_t duration;
int order; ///< interleaving order if dts are equal
int interlaced; ///< wether picture is interlaced
} MXFStreamContext;
typedef struct {
UID container_ul;
UID element_ul;
UID codec_ul;
enum CodecID id;
void (*write_desc)();
} MXFContainerEssenceEntry;
static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st);
static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st);
static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },
{ 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },
CODEC_ID_MPEG2VIDEO, mxf_write_mpegvideo_desc },
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },
{ 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
CODEC_ID_PCM_S16LE, mxf_write_wav_desc },
{ { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
{ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
{ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
CODEC_ID_NONE, NULL },
};
typedef struct MXFContext {
int64_t footer_partition_offset;
int essence_container_count;
uint8_t essence_containers_indices[FF_ARRAY_ELEMS(mxf_essence_container_uls)];
AVRational time_base;
int header_written;
} MXFContext;
static const uint8_t uuid_base[] = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };
static const uint8_t umid_base[] = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x01,0x0D,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 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 };
static const uint8_t header_open_partition_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }; // OpenIncomplete
static const uint8_t header_closed_partition_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }; // ClosedComplete
/**
* 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 uint8_t multiple_desc_ul[] = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x0D,0x01,0x03,0x01,0x02,0x7F,0x01,0x00 };
/**
* 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,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* 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 */
{ 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* 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,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */
{ 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,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* 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 Descriptors reference array */
{ 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */
{ 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */
{ 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */
// Generic Picture Essence 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 Height */
{ 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 Sound Essence Descriptor
{ 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */
{ 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}}, /* ChannelCount */
{ 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */
{ 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */
};
static void mxf_write_uuid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
{
put_buffer(pb, uuid_base, 12);
put_be16(pb, type);
put_be16(pb, value);
}
static void mxf_write_umid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
{
put_buffer(pb, umid_base, 16);
mxf_write_uuid(pb, type, value);
}
static void mxf_write_refs_count(ByteIOContext *pb, int ref_count)
{
put_be32(pb, ref_count);
put_be32(pb, 16);
}
static int klv_encode_ber_length(ByteIOContext *pb, uint64_t len)
{
// Determine the best BER size
int size;
if (len < 128) {
//short form
put_byte(pb, len);
return 1;
}
size = (av_log2(len) >> 3) + 1;
// long form
put_byte(pb, 0x80 + size);
while(size) {
size --;
put_byte(pb, len >> 8 * size & 0xff);
}
return 0;
}
/*
* Get essence container ul index
*/
static int mxf_get_essence_container_ul_index(enum CodecID id)
{
int i;
for (i = 0; i < FF_ARRAY_ELEMS(mxf_essence_container_uls); i++)
if (mxf_essence_container_uls[i].id == id)
return i;
return -1;
}
static void mxf_write_primer_pack(AVFormatContext *s)
{
ByteIOContext *pb = s->pb;
int local_tag_number, i = 0;
local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);
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 (i = 0; i < local_tag_number; i++) {
put_be16(pb, mxf_local_tag_batch[i].local_tag);
put_buffer(pb, mxf_local_tag_batch[i].uid, 16);
}
}
static void mxf_write_local_tag(ByteIOContext *pb, int size, int tag)
{
put_be16(pb, tag);
put_be16(pb, size);
}
static void mxf_write_metadata_key(ByteIOContext *pb, unsigned int value)
{
put_buffer(pb, header_metadata_key, 13);
put_be24(pb, value);
}
static void mxf_free(AVFormatContext *s)
{
int i;
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
av_freep(&st->priv_data);
}
}
static const MXFDataDefinitionUL *mxf_get_data_definition_ul(enum CodecType type)
{
const MXFDataDefinitionUL *uls = ff_mxf_data_definition_uls;
while (uls->type != CODEC_TYPE_DATA) {
if (type == uls->type)
break;
uls++;
}
return uls;
}
static void mxf_write_essence_container_refs(AVFormatContext *s)
{
MXFContext *c = s->priv_data;
ByteIOContext *pb = s->pb;
int i;
mxf_write_refs_count(pb, c->essence_container_count);
av_log(s,AV_LOG_DEBUG, "essence container count:%d\n", c->essence_container_count);
for (i = 0; i < c->essence_container_count; i++) {
put_buffer(pb, mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul, 16);
PRINT_KEY(s, "essence container ul:\n", mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul);
}
}
static void mxf_write_preface(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
ByteIOContext *pb = s->pb;
mxf_write_metadata_key(pb, 0x012f00);
PRINT_KEY(s, "preface key", pb->buf_ptr - 16);
klv_encode_ber_length(pb, 130 + 16 * mxf->essence_container_count);
// write preface set uid
mxf_write_local_tag(pb, 16, 0x3C0A);
mxf_write_uuid(pb, Preface, 0);
PRINT_KEY(s, "preface uid", pb->buf_ptr - 16);
// 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
mxf_write_local_tag(pb, 16 + 8, 0x3B06);
mxf_write_refs_count(pb, 1);
mxf_write_uuid(pb, Identification, 0);
// write content_storage_refs
mxf_write_local_tag(pb, 16, 0x3B03);
mxf_write_uuid(pb, ContentStorage, 0);
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_essence_container_refs(s);
// write dm_scheme_refs
mxf_write_local_tag(pb, 8, 0x3B0B);
put_be64(pb, 0);
}
/*
* Write a local tag containing an ascii string as utf-16
*/
static void mxf_write_local_tag_utf16(ByteIOContext *pb, int tag, const char *value)
{
int i, size = strlen(value);
mxf_write_local_tag(pb, size*2, tag);
for (i = 0; i < size; i++)
put_be16(pb, value[i]);
}
static void mxf_write_identification(AVFormatContext *s)
{
ByteIOContext *pb = s->pb;
const char *company = "FFmpeg";
const char *product = "OP1a Muxer";
const char *version;
int length;
mxf_write_metadata_key(pb, 0x013000);
PRINT_KEY(s, "identification key", pb->buf_ptr - 16);
version = s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT ?
"0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);
length = 84 + (strlen(company)+strlen(product)+strlen(version))*2; // utf-16
klv_encode_ber_length(pb, length);
// write uid
mxf_write_local_tag(pb, 16, 0x3C0A);
mxf_write_uuid(pb, Identification, 0);
PRINT_KEY(s, "identification uid", pb->buf_ptr - 16);
// write generation uid
mxf_write_local_tag(pb, 16, 0x3C09);
mxf_write_uuid(pb, Identification, 1);
mxf_write_local_tag_utf16(pb, 0x3C01, company); // Company Name
mxf_write_local_tag_utf16(pb, 0x3C02, product); // Product Name
mxf_write_local_tag_utf16(pb, 0x3C04, version); // Version String
// write product uid
mxf_write_local_tag(pb, 16, 0x3C05);
mxf_write_uuid(pb, Identification, 2);
// write modified date
mxf_write_local_tag(pb, 8, 0x3C06);
put_be64(pb, 0);
}
static void mxf_write_content_storage(AVFormatContext *s)
{
ByteIOContext *pb = s->pb;
mxf_write_metadata_key(pb, 0x011800);
PRINT_KEY(s, "content storage key", pb->buf_ptr - 16);
klv_encode_ber_length(pb, 92);
// write uid
mxf_write_local_tag(pb, 16, 0x3C0A);
mxf_write_uuid(pb, ContentStorage, 0);
PRINT_KEY(s, "content storage uid", pb->buf_ptr - 16);
// write package reference
mxf_write_local_tag(pb, 16 * 2 + 8, 0x1901);
mxf_write_refs_count(pb, 2);
mxf_write_uuid(pb, MaterialPackage, 0);
mxf_write_uuid(pb, SourcePackage, 0);
// write essence container data
mxf_write_local_tag(pb, 8 + 16, 0x1902);
mxf_write_refs_count(pb, 1);
mxf_write_uuid(pb, EssenceContainerData, 0);
}
static void mxf_write_track(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
{
ByteIOContext *pb = s->pb;
MXFStreamContext *sc = st->priv_data;
mxf_write_metadata_key(pb, 0x013b00);
PRINT_KEY(s, "track key", pb->buf_ptr - 16);
klv_encode_ber_length(pb, 80);
// write track uid
mxf_write_local_tag(pb, 16, 0x3C0A);
mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, st->index);
PRINT_KEY(s, "track uid", pb->buf_ptr - 16);
// write track id
mxf_write_local_tag(pb, 4, 0x4801);
put_be32(pb, st->index);
// write track number
mxf_write_local_tag(pb, 4, 0x4804);
if (type == MaterialPackage)
put_be32(pb, 0); // track number of material package is 0
else
put_buffer(pb, sc->track_essence_element_key + 12, 4);
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
mxf_write_local_tag(pb, 16, 0x4803);
mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
}
static void mxf_write_common_fields(ByteIOContext *pb, AVStream *st)
{
const MXFDataDefinitionUL *data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);
MXFStreamContext *sc = st->priv_data;
// find data define uls
mxf_write_local_tag(pb, 16, 0x0201);
put_buffer(pb, data_def_ul->uid, 16);
// write duration
mxf_write_local_tag(pb, 8, 0x0202);
put_be64(pb, sc->duration);
}
static void mxf_write_sequence(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
{
ByteIOContext *pb = s->pb;
mxf_write_metadata_key(pb, 0x010f00);
PRINT_KEY(s, "sequence key", pb->buf_ptr - 16);
klv_encode_ber_length(pb, 80);
mxf_write_local_tag(pb, 16, 0x3C0A);
mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
PRINT_KEY(s, "sequence uid", pb->buf_ptr - 16);
mxf_write_common_fields(pb, st);
// write structural component
mxf_write_local_tag(pb, 16 + 8, 0x1001);
mxf_write_refs_count(pb, 1);
mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
}
static void mxf_write_structural_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
{
ByteIOContext *pb = s->pb;
int i;
mxf_write_metadata_key(pb, 0x011100);
PRINT_KEY(s, "sturctural component key", pb->buf_ptr - 16);
klv_encode_ber_length(pb, 108);
// write uid
mxf_write_local_tag(pb, 16, 0x3C0A);
mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
PRINT_KEY(s, "structural component uid", pb->buf_ptr - 16);
mxf_write_common_fields(pb, st);
// write start_position
mxf_write_local_tag(pb, 8, 0x1201);
put_be64(pb, 0);
// write source package uid, end of the reference
mxf_write_local_tag(pb, 32, 0x1101);
if (type == SourcePackage) {
for (i = 0; i < 4; i++)
put_be64(pb, 0);
} else
mxf_write_umid(pb, SourcePackage, 0);
// write source track id
mxf_write_local_tag(pb, 4, 0x1102);
if (type == SourcePackage)
put_be32(pb, 0);
else
put_be32(pb, st->index);
}
static void mxf_write_multi_descriptor(AVFormatContext *s)
{
ByteIOContext *pb = s->pb;
int i;
mxf_write_metadata_key(pb, 0x014400);
PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);
klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);
mxf_write_local_tag(pb, 16, 0x3C0A);
mxf_write_uuid(pb, MultipleDescriptor, 0);
PRINT_KEY(s, "multi_desc uid", pb->buf_ptr - 16);
// write sample rate
mxf_write_local_tag(pb, 8, 0x3001);
put_be32(pb, s->streams[0]->time_base.den);
put_be32(pb, s->streams[0]->time_base.num);
// write essence container ul
mxf_write_local_tag(pb, 16, 0x3004);
put_buffer(pb, multiple_desc_ul, 16);
// write sub descriptor refs
mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x3F01);
mxf_write_refs_count(pb, s->nb_streams);
for (i = 0; i < s->nb_streams; i++)
mxf_write_uuid(pb, SubDescriptor, i);
}
static void mxf_write_generic_desc(ByteIOContext *pb, AVStream *st, const UID key, unsigned size)
{
MXFStreamContext *sc = st->priv_data;
put_buffer(pb, key, 16);
klv_encode_ber_length(pb, size);
mxf_write_local_tag(pb, 16, 0x3C0A);
mxf_write_uuid(pb, SubDescriptor, st->index);
mxf_write_local_tag(pb, 4, 0x3006);
put_be32(pb, st->index);
mxf_write_local_tag(pb, 8, 0x3001);
put_be32(pb, st->time_base.den);
put_be32(pb, st->time_base.num);
mxf_write_local_tag(pb, 16, 0x3004);
put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
}
static const UID mxf_mpegvideo_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 };
static const UID mxf_wav_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 };
static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
{
MXFStreamContext *sc = st->priv_data;
ByteIOContext *pb = s->pb;
int stored_height = (st->codec->height+15)/16*16;
AVRational dar;
mxf_write_generic_desc(pb, st, mxf_mpegvideo_descriptor_key, 108);
mxf_write_local_tag(pb, 4, 0x3203);
put_be32(pb, st->codec->width);
mxf_write_local_tag(pb, 4, 0x3202);
put_be32(pb, stored_height>>sc->interlaced);
av_reduce(&dar.num, &dar.den,
st->codec->width*st->codec->sample_aspect_ratio.num,
st->codec->height*st->codec->sample_aspect_ratio.den,
1024*1024);
mxf_write_local_tag(pb, 8, 0x320E);
put_be32(pb, dar.num);
put_be32(pb, dar.den);
mxf_write_local_tag(pb, 16, 0x3201);
put_buffer(pb, *sc->codec_ul, 16);
}
static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
{
ByteIOContext *pb = s->pb;
mxf_write_generic_desc(pb, st, key, size);
// audio locked
mxf_write_local_tag(pb, 1, 0x3D02);
put_byte(pb, 1);
// 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_coded_sample);
}
static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)
{
mxf_write_generic_sound_desc(s, st, mxf_wav_descriptor_key, 93);
}
static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)
{
ByteIOContext *pb = s->pb;
int i;
if (type == MaterialPackage) {
mxf_write_metadata_key(pb, 0x013600);
PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);
klv_encode_ber_length(pb, 92 + 16 * s->nb_streams);
} else {
mxf_write_metadata_key(pb, 0x013700);
PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);
klv_encode_ber_length(pb, 112 + 16 * s->nb_streams); // 20 bytes length for descriptor reference
}
// write uid
mxf_write_local_tag(pb, 16, 0x3C0A);
mxf_write_uuid(pb, type, 0);
av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);
PRINT_KEY(s, "package uid", pb->buf_ptr - 16);
// write package umid
mxf_write_local_tag(pb, 32, 0x4401);
mxf_write_umid(pb, type, 0);
PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);
// 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
mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x4403);
mxf_write_refs_count(pb, s->nb_streams);
for (i = 0; i < s->nb_streams; i++)
mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);
// write multiple descriptor reference
if (type == SourcePackage) {
mxf_write_local_tag(pb, 16, 0x4701);
if (s->nb_streams > 1) {
mxf_write_uuid(pb, MultipleDescriptor, 0);
mxf_write_multi_descriptor(s);
} else
mxf_write_uuid(pb, SubDescriptor, 0);
}
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
mxf_write_track(s, st, type);
mxf_write_sequence(s, st, type);
mxf_write_structural_component(s, st, type);
if (type == SourcePackage) {
MXFStreamContext *sc = st->priv_data;
mxf_essence_container_uls[sc->index].write_desc(s, st);
}
}
}
static int mxf_write_essence_container_data(AVFormatContext *s)
{
ByteIOContext *pb = s->pb;
mxf_write_metadata_key(pb, 0x012300);
klv_encode_ber_length(pb, 64);
mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID
mxf_write_uuid(pb, EssenceContainerData, 0);
mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID
mxf_write_umid(pb, SourcePackage, 0);
mxf_write_local_tag(pb, 4, 0x3F07); // BodySID
put_be32(pb, 1);
return 0;
}
static int mxf_write_header_metadata_sets(AVFormatContext *s)
{
mxf_write_preface(s);
mxf_write_identification(s);
mxf_write_content_storage(s);
mxf_write_package(s, MaterialPackage);
mxf_write_package(s, SourcePackage);
mxf_write_essence_container_data(s);
return 0;
}
static void mxf_write_partition(AVFormatContext *s, int bodysid, const uint8_t *key, int write_metadata)
{
MXFContext *mxf = s->priv_data;
ByteIOContext *pb = s->pb;
int64_t header_byte_count_offset;
// 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, url_ftell(pb) - 25); // thisPartition
put_be64(pb, 0); // previousPartition
put_be64(pb, mxf->footer_partition_offset); // footerPartition
// set offset
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_essence_container_refs(s);
if (write_metadata) {
// mark the start of the headermetadata and calculate metadata size
int64_t pos, start = url_ftell(s->pb);
mxf_write_primer_pack(s);
mxf_write_header_metadata_sets(s);
pos = url_ftell(s->pb);
// update header_byte_count
url_fseek(pb, header_byte_count_offset, SEEK_SET);
put_be64(pb, pos - start);
url_fseek(pb, pos, SEEK_SET);
}
put_flush_packet(pb);
}
static const UID mxf_mpeg2_codec_uls[] = {
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP
};
static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)
{
if (avctx->profile == 4) { // Main
if (avctx->level == 8) // Main
return avctx->gop_size ?
&mxf_mpeg2_codec_uls[1] :
&mxf_mpeg2_codec_uls[0];
else if (avctx->level == 4) // High
return avctx->gop_size ?
&mxf_mpeg2_codec_uls[5] :
&mxf_mpeg2_codec_uls[4];
} else if (avctx->profile == 0) { // 422
if (avctx->level == 5) // Main
return avctx->gop_size ?
&mxf_mpeg2_codec_uls[3] :
&mxf_mpeg2_codec_uls[2];
else if (avctx->level == 2) // High
return avctx->gop_size ?
&mxf_mpeg2_codec_uls[7] :
&mxf_mpeg2_codec_uls[6];
}
return NULL;
}
static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)
{
MXFStreamContext *sc = st->priv_data;
uint32_t c = -1;
int i;
for(i = 0; i < pkt->size - 4; i++) {
c = (c<<8) + pkt->data[i];
if (c == 0x1B5) {
if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
st->codec->profile = pkt->data[i+1] & 0x07;
st->codec->level = pkt->data[i+2] >> 4;
} else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext
sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame
break;
}
}
}
sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);
return !!sc->codec_ul;
}
static int ff_audio_interleave_init(AVFormatContext *s, const int *samples_per_frame)
{
int i;
if (!samples_per_frame)
samples_per_frame = PAL_samples_per_frame;
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
AudioInterleaveContext *aic = st->priv_data;
if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
aic->sample_size = (st->codec->channels *
av_get_bits_per_sample(st->codec->codec_id)) / 8;
if (!aic->sample_size) {
av_log(s, AV_LOG_ERROR, "could not compute sample size\n");
return -1;
}
aic->samples_per_frame = samples_per_frame;
aic->samples = aic->samples_per_frame;
av_fifo_init(&aic->fifo, 100 * *aic->samples);
}
}
return 0;
}
static int mxf_write_header(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
int i;
uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};
const int *samples_per_frame = NULL;
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
MXFStreamContext *sc = av_mallocz(sizeof(*sc));
if (!sc)
return AVERROR(ENOMEM);
st->priv_data = sc;
if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
if (!av_cmp_q(st->codec->time_base, (AVRational){ 1, 25 })) {
samples_per_frame = PAL_samples_per_frame;
mxf->time_base = (AVRational){ 1, 25 };
} else if (!av_cmp_q(st->codec->time_base, (AVRational){ 1001, 30000 })) {
samples_per_frame = NTSC_samples_per_frame;
mxf->time_base = (AVRational){ 1001, 30000 };
} else {
av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");
return -1;
}
} else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
if (st->codec->sample_rate != 48000) {
av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");
return -1;
}
}
sc->duration = -1;
sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);
if (sc->index == -1) {
av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "
"codec not currently supported in container\n", i);
return -1;
}
sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;
if (!present[sc->index]) {
mxf->essence_containers_indices[mxf->essence_container_count++] = sc->index;
present[sc->index] = 1;
} else
present[sc->index]++;
memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);
sc->track_essence_element_key[15] = present[sc->index];
PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);
}
for (i = 0; i < s->nb_streams; i++) {
MXFStreamContext *sc = s->streams[i]->priv_data;
av_set_pts_info(s->streams[i], 64, mxf->time_base.num, mxf->time_base.den);
// update element count
sc->track_essence_element_key[13] = present[sc->index];
sc->order = AV_RB32(sc->track_essence_element_key+12);
}
if (ff_audio_interleave_init(s, samples_per_frame) < 0)
return -1;
return 0;
}
static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
{
MXFContext *mxf = s->priv_data;
ByteIOContext *pb = s->pb;
AVStream *st = s->streams[pkt->stream_index];
MXFStreamContext *sc = st->priv_data;
if (!mxf->header_written) {
if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
if (!mxf_parse_mpeg2_frame(s, st, pkt)) {
av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
return -1;
}
}
mxf_write_partition(s, 1, header_open_partition_key, 1);
mxf->header_written = 1;
}
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
sc->duration = FFMAX(pkt->pts + pkt->duration, sc->duration);
put_flush_packet(pb);
return 0;
}
static int mxf_write_footer(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
ByteIOContext *pb = s->pb;
mxf->footer_partition_offset = url_ftell(pb);
mxf_write_partition(s, 0, footer_partition_key, 0);
if (!url_is_streamed(s->pb)) {
url_fseek(pb, 0, SEEK_SET);
mxf_write_partition(s, 1, header_closed_partition_key, 1);
}
mxf_free(s);
return 0;
}
static int mxf_interleave_new_audio_packet(AVFormatContext *s, AVPacket *pkt,
int stream_index, int flush)
{
AVStream *st = s->streams[stream_index];
AudioInterleaveContext *aic = st->priv_data;
int size = FFMIN(av_fifo_size(&aic->fifo), *aic->samples * aic->sample_size);
if (!size || (!flush && size == av_fifo_size(&aic->fifo)))
return 0;
av_new_packet(pkt, size);
av_fifo_read(&aic->fifo, pkt->data, size);
pkt->dts = pkt->pts = aic->dts;
pkt->duration = av_rescale_q(*aic->samples,
(AVRational){ 1, st->codec->sample_rate },
st->time_base);
pkt->stream_index = stream_index;
aic->dts += pkt->duration;
aic->samples++;
if (!*aic->samples)
aic->samples = aic->samples_per_frame;
return size;
}
static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, int flush)
{
AVPacketList *pktl;
int stream_count = 0;
int streams[MAX_STREAMS];
memset(streams, 0, sizeof(streams));
pktl = s->packet_buffer;
while (pktl) {
//av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);
if (!streams[pktl->pkt.stream_index])
stream_count++;
streams[pktl->pkt.stream_index]++;
pktl = pktl->next;
}
if (stream_count && (s->nb_streams == stream_count || flush)) {
pktl = s->packet_buffer;
*out = pktl->pkt;
//av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);
s->packet_buffer = pktl->next;
av_freep(&pktl);
if (flush && stream_count < s->nb_streams) {
// purge packet queue
pktl = s->packet_buffer;
while (pktl) {
AVPacketList *next = pktl->next;
av_free_packet(&pktl->pkt);
av_freep(&pktl);
pktl = next;
}
s->packet_buffer = NULL;
}
return 1;
} else {
av_init_packet(out);
return 0;
}
}
static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
{
AVStream *st = s->streams[pkt ->stream_index];
AVStream *st2 = s->streams[next->stream_index];
MXFStreamContext *sc = st ->priv_data;
MXFStreamContext *sc2 = st2->priv_data;
int64_t left = st2->time_base.num * (int64_t)st ->time_base.den;
int64_t right = st ->time_base.num * (int64_t)st2->time_base.den;
return next->dts * left > pkt->dts * right || // FIXME this can overflow
(next->dts * left == pkt->dts * right && sc->order < sc2->order);
}
static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
{
int i;
if (pkt) {
AVStream *st = s->streams[pkt->stream_index];
AudioInterleaveContext *aic = st->priv_data;
if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
av_fifo_generic_write(&aic->fifo, pkt->data, pkt->size, NULL);
} else {
// rewrite pts and dts to be decoded time line position
pkt->pts = pkt->dts = aic->dts;
aic->dts += pkt->duration;
ff_interleave_add_packet(s, pkt, mxf_compare_timestamps);
}
}
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
AVPacket new_pkt;
while (mxf_interleave_new_audio_packet(s, &new_pkt, i, flush))
ff_interleave_add_packet(s, &new_pkt, mxf_compare_timestamps);
}
}
return mxf_interleave_get_packet(s, out, flush);
}
AVOutputFormat mxf_muxer = {
"mxf",
NULL_IF_CONFIG_SMALL("Material eXchange Format"),
NULL,
"mxf",
sizeof(MXFContext),
CODEC_ID_PCM_S16LE,
CODEC_ID_MPEG2VIDEO,
mxf_write_header,
mxf_write_packet,
mxf_write_footer,
0,
NULL,
mxf_interleave,
};