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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>
* Copyright (c) 2008 Baptiste Coudurier <baptiste dot coudurier 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 <math.h>
#include <time.h>
#include "libavutil/fifo.h"
#include "libavcodec/bytestream.h"
#include "audiointerleave.h"
#include "avformat.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 };
#define EDIT_UNITS_PER_BODY 250
#define KAG_SIZE 512
typedef struct {
int local_tag;
UID uid;
} MXFLocalTagPair;
typedef struct {
uint8_t flags;
uint64_t offset;
unsigned slice_offset; ///< offset of audio slice
} MXFIndexEntry;
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
int temporal_reordering;
} MXFStreamContext;
typedef struct {
UID container_ul;
UID element_ul;
UID codec_ul;
void (*write_desc)();
} MXFContainerEssenceEntry;
static const struct {
enum CodecID id;
int index;
} mxf_essence_mappings[] = {
{ CODEC_ID_MPEG2VIDEO, 0 },
{ CODEC_ID_PCM_S24LE, 1 },
{ CODEC_ID_PCM_S16LE, 1 },
{ 0 }
};
static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st);
static void mxf_write_aes3_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 },
mxf_write_mpegvideo_desc },
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },
{ 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
mxf_write_aes3_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 },
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 },
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;
MXFIndexEntry *index_entries;
unsigned edit_units_count;
uint64_t timestamp; ///< timestamp, as year(16),month(8),day(8),hour(8),minutes(8),msec/4(8)
uint8_t slice_count; ///< index slice count minus 1 (1 if no audio, 0 otherwise)
int last_indexed_edit_unit;
uint64_t first_edit_unit_offset;
uint64_t *body_partition_offset;
unsigned body_partitions_count;
int last_key_index; ///< index of last key frame
} 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 index_table_segment_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 };
static const uint8_t random_index_pack_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
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
static const uint8_t klv_fill_key[] = { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x03,0x01,0x02,0x10,0x01,0x00,0x00,0x00 };
static const uint8_t body_partition_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }; // 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,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* 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
{ 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */
{ 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */
{ 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 */
{ 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */
{ 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display 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 */
// CDCI Picture Essence Descriptor
{ 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */
{ 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */
// Generic Sound Essence Descriptor
{ 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* 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 */
// Index Table Segment
{ 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */
{ 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */
{ 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */
{ 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */
{ 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */
{ 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */
{ 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */
{ 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */
// MPEG video Descriptor
{ 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */
// Wave Audio Essence Descriptor
{ 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */
{ 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */
};
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_ber_length(uint64_t len)
{
if (len < 128)
return 1;
else
return (av_log2(len) >> 3) + 2;
}
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; mxf_essence_mappings[i].id; i++)
if (mxf_essence_mappings[i].id == id)
return mxf_essence_mappings[i].index;
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 MXFCodecUL *mxf_get_data_definition_ul(int type)
{
const MXFCodecUL *uls = ff_mxf_data_definition_uls;
while (uls->uid[0]) {
if (type == uls->id)
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);
// last modified date
mxf_write_local_tag(pb, 8, 0x3B02);
put_be64(pb, mxf->timestamp);
// 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);
// operational pattern
mxf_write_local_tag(pb, 16, 0x3B09);
if (s->nb_streams > 1) {
put_buffer(pb, op1a_ul, 14);
put_be16(pb, 0x0900); // multi track
} else {
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)
{
MXFContext *mxf = s->priv_data;
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);
// modification date
mxf_write_local_tag(pb, 8, 0x3C06);
put_be64(pb, mxf->timestamp);
}
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)
{
MXFContext *mxf = s->priv_data;
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, mxf->time_base.den);
put_be32(pb, mxf->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 MXFCodecUL *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)
{
MXFContext *mxf = s->priv_data;
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, mxf->time_base.den);
put_be32(pb, mxf->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(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
{
MXFContext *mxf = s->priv_data;
MXFStreamContext *sc = st->priv_data;
ByteIOContext *pb = s->pb;
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, mxf->time_base.den);
put_be32(pb, mxf->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 const UID mxf_aes3_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 };
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;
int f1, f2;
mxf_write_generic_desc(s, st, mxf_mpegvideo_descriptor_key, 169+sc->interlaced*4);
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);
mxf_write_local_tag(pb, 4, 0x3209);
put_be32(pb, st->codec->width);
mxf_write_local_tag(pb, 4, 0x3208);
put_be32(pb, st->codec->height>>sc->interlaced);
// component depth
mxf_write_local_tag(pb, 4, 0x3301);
put_be32(pb, 8);
// horizontal subsampling
mxf_write_local_tag(pb, 4, 0x3302);
put_be32(pb, 2);
// bit rate
mxf_write_local_tag(pb, 4, 0x8000);
put_be32(pb, st->codec->bit_rate);
// frame layout
mxf_write_local_tag(pb, 1, 0x320C);
put_byte(pb, sc->interlaced);
// video line map
switch (st->codec->height) {
case 576: f1 = 23; f2 = 336; break;
case 608: f1 = 7; f2 = 320; break;
case 480: f1 = 20; f2 = 283; break;
case 512: f1 = 7; f2 = 270; break;
case 720: f1 = 26; f2 = 0; break; // progressive
case 1080: f1 = 21; f2 = 584; break;
default: f1 = 0; f2 = 0; break;
}
if (!sc->interlaced) {
f2 = 0;
f1 *= 2;
}
mxf_write_local_tag(pb, 12+sc->interlaced*4, 0x320D);
put_be32(pb, sc->interlaced ? 2 : 1);
put_be32(pb, 4);
put_be32(pb, f1);
if (sc->interlaced)
put_be32(pb, f2);
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(s, 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, av_get_bits_per_sample(st->codec->codec_id));
}
static void mxf_write_wav_common_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
{
ByteIOContext *pb = s->pb;
mxf_write_generic_sound_desc(s, st, key, size);
mxf_write_local_tag(pb, 2, 0x3D0A);
put_be16(pb, st->codec->block_align);
// avg bytes per sec
mxf_write_local_tag(pb, 4, 0x3D09);
put_be32(pb, st->codec->block_align*st->codec->sample_rate);
}
static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)
{
mxf_write_wav_common_desc(s, st, mxf_wav_descriptor_key, 107);
}
static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)
{
mxf_write_wav_common_desc(s, st, mxf_aes3_descriptor_key, 107);
}
static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)
{
MXFContext *mxf = s->priv_data;
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);
// package creation date
mxf_write_local_tag(pb, 8, 0x4405);
put_be64(pb, mxf->timestamp);
// package modified date
mxf_write_local_tag(pb, 8, 0x4404);
put_be64(pb, mxf->timestamp);
// 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, 72);
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);
mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID
put_be32(pb, 2);
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 unsigned klv_fill_size(uint64_t size)
{
unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));
if (pad < 17) // smallest fill item possible
return pad + KAG_SIZE;
else
return pad & (KAG_SIZE-1);
}
static void mxf_write_index_table_segment(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
ByteIOContext *pb = s->pb;
int i, j;
int temporal_reordering = 0;
int key_index = 0;
av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);
if (!mxf->edit_units_count)
return;
put_buffer(pb, index_table_segment_key, 16);
klv_encode_ber_length(pb, 109 + (s->nb_streams+1)*6 +
mxf->edit_units_count*(11+mxf->slice_count*4));
// instance id
mxf_write_local_tag(pb, 16, 0x3C0A);
mxf_write_uuid(pb, IndexTableSegment, 0);
// index edit rate
mxf_write_local_tag(pb, 8, 0x3F0B);
put_be32(pb, mxf->time_base.num);
put_be32(pb, mxf->time_base.den);
// index start position
mxf_write_local_tag(pb, 8, 0x3F0C);
put_be64(pb, mxf->last_indexed_edit_unit);
// index duration
mxf_write_local_tag(pb, 8, 0x3F0D);
put_be64(pb, mxf->edit_units_count);
// edit unit byte count
mxf_write_local_tag(pb, 4, 0x3F05);
put_be32(pb, 0);
// index sid
mxf_write_local_tag(pb, 4, 0x3F06);
put_be32(pb, 2);
// body sid
mxf_write_local_tag(pb, 4, 0x3F07);
put_be32(pb, 1);
// real slice count - 1
mxf_write_local_tag(pb, 1, 0x3F08);
put_byte(pb, mxf->slice_count);
// delta entry array
mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);
put_be32(pb, s->nb_streams+1); // num of entries
put_be32(pb, 6); // size of one entry
// write system item delta entry
put_byte(pb, 0);
put_byte(pb, 0); // slice entry
put_be32(pb, 0); // element delta
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
MXFStreamContext *sc = st->priv_data;
put_byte(pb, sc->temporal_reordering);
if (sc->temporal_reordering)
temporal_reordering = 1;
// slice number
if (i == 0) { // video track
put_byte(pb, 0); // slice number
put_be32(pb, KAG_SIZE); // system item size including klv fill
} else { // audio track
unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;
audio_frame_size += klv_fill_size(audio_frame_size);
put_byte(pb, 1);
put_be32(pb, (i-1)*audio_frame_size); // element delta
}
}
mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);
put_be32(pb, mxf->edit_units_count); // num of entries
put_be32(pb, 11+mxf->slice_count*4); // size of one entry
for (i = 0; i < mxf->edit_units_count; i++) {
if (temporal_reordering) {
int temporal_offset = 0;
for (j = i+1; j < mxf->edit_units_count; j++) {
temporal_offset++;
if (mxf->index_entries[j].flags & 0x10) { // backward prediction
// next is not b, so is reordered
if (!(mxf->index_entries[i+1].flags & 0x10)) {
if ((mxf->index_entries[i].flags & 0x11) == 0) // i frame
temporal_offset = 0;
else
temporal_offset = -temporal_offset;
}
break;
}
}
put_byte(pb, temporal_offset);
} else
put_byte(pb, 0);
if (!(mxf->index_entries[i].flags & 0x33)) { // I frame
mxf->last_key_index = key_index;
key_index = i;
}
if (mxf->index_entries[i].flags & 0x10 && // backward prediction
!(mxf->index_entries[key_index].flags & 0x80)) { // open gop
put_byte(pb, mxf->last_key_index - i);
} else {
put_byte(pb, key_index - i); // key frame offset
if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward
mxf->last_key_index = key_index;
}
put_byte(pb, mxf->index_entries[i].flags);
// stream offset
put_be64(pb, mxf->index_entries[i].offset - mxf->first_edit_unit_offset);
if (s->nb_streams > 1)
put_be32(pb, mxf->index_entries[i].slice_offset);
}
mxf->last_indexed_edit_unit += mxf->edit_units_count;
mxf->edit_units_count = 0;
}
static void mxf_write_klv_fill(AVFormatContext *s)
{
unsigned pad = klv_fill_size(url_ftell(s->pb));
if (pad) {
put_buffer(s->pb, klv_fill_key, 16);
pad -= 16;
pad -= klv_ber_length(pad);
klv_encode_ber_length(s->pb, pad);
for (; pad > 7; pad -= 8)
put_be64(s->pb, 0);
for (; pad; pad--)
put_byte(s->pb, 0);
assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));
}
}
static void mxf_write_partition(AVFormatContext *s, int bodysid,
int indexsid,
const uint8_t *key, int write_metadata)
{
MXFContext *mxf = s->priv_data;
ByteIOContext *pb = s->pb;
int64_t header_byte_count_offset;
unsigned index_byte_count = 0;
uint64_t partition_offset = url_ftell(pb);
if (mxf->edit_units_count) {
index_byte_count = 109 + (s->nb_streams+1)*6 +
mxf->edit_units_count*(11+mxf->slice_count*4);
// add encoded ber length
index_byte_count += 16 + klv_ber_length(index_byte_count);
index_byte_count += klv_fill_size(index_byte_count);
}
if (!memcmp(key, body_partition_key, 16)) {
mxf->body_partition_offset =
av_realloc(mxf->body_partition_offset,
(mxf->body_partitions_count+1)*
sizeof(*mxf->body_partition_offset));
mxf->body_partition_offset[mxf->body_partitions_count++] = partition_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, KAG_SIZE); // KAGSize
put_be64(pb, partition_offset); // ThisPartition
if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)
put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition
else if (!memcmp(key, footer_partition_key, 16))
put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition
else
put_be64(pb, 0);
put_be64(pb, mxf->footer_partition_offset); // footerPartition
// set offset
header_byte_count_offset = url_ftell(pb);
put_be64(pb, 0); // headerByteCount, update later
// indexTable
put_be64(pb, index_byte_count); // indexByteCount
put_be32(pb, index_byte_count ? indexsid : 0); // indexSID
// BodyOffset
if (bodysid && mxf->edit_units_count) {
uint64_t partition_end = url_ftell(pb) + 8 + 4 + 16 + 8 +
16*mxf->essence_container_count;
put_be64(pb, partition_end + klv_fill_size(partition_end) +
index_byte_count - mxf->first_edit_unit_offset);
} else
put_be64(pb, 0);
put_be32(pb, bodysid); // bodySID
// operational pattern
if (s->nb_streams > 1) {
put_buffer(pb, op1a_ul, 14);
put_be16(pb, 0x0900); // multi track
} else {
put_buffer(pb, op1a_ul, 16);
}
// 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;
unsigned header_byte_count;
mxf_write_klv_fill(s);
start = url_ftell(s->pb);
mxf_write_primer_pack(s);
mxf_write_header_metadata_sets(s);
pos = url_ftell(s->pb);
header_byte_count = pos - start + klv_fill_size(pos);
// update header_byte_count
url_fseek(pb, header_byte_count_offset, SEEK_SET);
put_be64(pb, header_byte_count);
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, int *flags)
{
MXFStreamContext *sc = st->priv_data;
uint32_t c = -1;
int i;
*flags = 0;
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;
}
} else if (c == 0x1b8) { // gop
if (i + 4 < pkt->size && pkt->data[i+4]>>6 & 0x01) // closed
*flags |= 0x80; // random access
} else if (c == 0x1b3) { // seq
*flags |= 0x40;
} else if (c == 0x100) { // pic
int pict_type = (pkt->data[i+2]>>3) & 0x07;
if (pict_type == 2) { // P frame
*flags |= 0x22;
st->codec->gop_size = 1;
} else if (pict_type == 3) { // B frame
*flags |= 0x33;
sc->temporal_reordering = -1;
} else if (!pict_type) {
av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");
return 0;
}
}
}
sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);
return !!sc->codec_ul;
}
static uint64_t mxf_parse_timestamp(time_t timestamp)
{
struct tm *time = localtime(&timestamp);
return (uint64_t)(time->tm_year+1900) << 48 |
(uint64_t)(time->tm_mon+1) << 40 |
(uint64_t) time->tm_mday << 32 |
time->tm_hour << 24 |
time->tm_min << 16 |
time->tm_sec << 8;
}
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 (i != 0) {
av_log(s, AV_LOG_ERROR, "video stream must be first track\n");
return -1;
}
if (fabs(av_q2d(st->codec->time_base) - 1/25.0) < 0.0001) {
samples_per_frame = PAL_samples_per_frame;
mxf->time_base = (AVRational){ 1, 25 };
} else if (fabs(av_q2d(st->codec->time_base) - 1001/30000.0) < 0.0001) {
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;
}
av_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);
} 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;
}
av_set_pts_info(st, 64, 1, st->codec->sample_rate);
mxf->slice_count = 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;
// update element count
sc->track_essence_element_key[13] = present[sc->index];
sc->order = AV_RB32(sc->track_essence_element_key+12);
}
mxf->timestamp = mxf_parse_timestamp(s->timestamp);
if (!samples_per_frame)
samples_per_frame = PAL_samples_per_frame;
if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)
return -1;
return 0;
}
static const uint8_t system_metadata_pack_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };
static const uint8_t system_metadata_package_set_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x43,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x02,0x01 };
static uint32_t ff_framenum_to_12m_time_code(unsigned frame, int drop, int fps)
{
return (0 << 31) | // color frame flag
(0 << 30) | // drop frame flag
( ((frame % fps) / 10) << 28) | // tens of frames
( ((frame % fps) % 10) << 24) | // units of frames
(0 << 23) | // field phase (NTSC), b0 (PAL)
((((frame / fps) % 60) / 10) << 20) | // tens of seconds
((((frame / fps) % 60) % 10) << 16) | // units of seconds
(0 << 15) | // b0 (NTSC), b2 (PAL)
((((frame / (fps * 60)) % 60) / 10) << 12) | // tens of minutes
((((frame / (fps * 60)) % 60) % 10) << 8) | // units of minutes
(0 << 7) | // b1
(0 << 6) | // b2 (NSC), field phase (PAL)
((((frame / (fps * 3600) % 24)) / 10) << 4) | // tens of hours
( (frame / (fps * 3600) % 24)) % 10; // units of hours
}
static void mxf_write_system_item(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
ByteIOContext *pb = s->pb;
unsigned fps, frame;
uint32_t time_code;
frame = mxf->last_indexed_edit_unit + mxf->edit_units_count;
// write system metadata pack
put_buffer(pb, system_metadata_pack_key, 16);
klv_encode_ber_length(pb, 57);
put_byte(pb, 0x5c); // UL, user date/time stamp, picture and sound item present
put_byte(pb, 0x04); // content package rate
put_byte(pb, 0x00); // content package type
put_be16(pb, 0x00); // channel handle
put_be16(pb, frame); // continuity count
if (mxf->essence_container_count > 1)
put_buffer(pb, multiple_desc_ul, 16);
else
put_buffer(pb, mxf_essence_container_uls[mxf->essence_containers_indices[0]].container_ul, 16);
put_byte(pb, 0);
put_be64(pb, 0);
put_be64(pb, 0); // creation date/time stamp
// XXX drop frame
if (mxf->time_base.den == 30000) fps = 30;
else fps = 25;
put_byte(pb, 0x81); // SMPTE 12M time code
time_code = ff_framenum_to_12m_time_code(frame, 0, fps);
put_be32(pb, time_code);
put_be32(pb, 0); // binary group data
put_be64(pb, 0);
// write system metadata package set
put_buffer(pb, system_metadata_package_set_key, 16);
klv_encode_ber_length(pb, 35);
put_byte(pb, 0x83); // UMID
put_be16(pb, 0x20);
mxf_write_umid(pb, SourcePackage, 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;
int flags = 0;
if (!(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {
mxf->index_entries = av_realloc(mxf->index_entries,
(mxf->edit_units_count + EDIT_UNITS_PER_BODY)*sizeof(*mxf->index_entries));
if (!mxf->index_entries) {
av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");
return -1;
}
}
if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
if (!mxf_parse_mpeg2_frame(s, st, pkt, &flags)) {
av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
return -1;
}
}
if (!mxf->header_written) {
mxf_write_partition(s, 0, 0, header_open_partition_key, 1);
mxf->header_written = 1;
}
if (st->index == 0) {
if ((!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&
!(flags & 0x33)) { // I frame, Gop start
mxf_write_klv_fill(s);
mxf_write_partition(s, 1, 2, body_partition_key, 0);
mxf_write_klv_fill(s);
mxf_write_index_table_segment(s);
}
mxf_write_klv_fill(s);
mxf->index_entries[mxf->edit_units_count].offset = url_ftell(pb);
mxf->index_entries[mxf->edit_units_count].flags = flags;
if (!mxf->first_edit_unit_offset)
mxf->first_edit_unit_offset = mxf->index_entries[0].offset;
mxf_write_system_item(s);
mxf->edit_units_count++;
} else if (st->index == 1) {
mxf->index_entries[mxf->edit_units_count-1].slice_offset =
url_ftell(pb) - mxf->index_entries[mxf->edit_units_count-1].offset;
}
mxf_write_klv_fill(s);
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 void mxf_write_random_index_pack(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
ByteIOContext *pb = s->pb;
uint64_t pos = url_ftell(pb);
int i;
put_buffer(pb, random_index_pack_key, 16);
klv_encode_ber_length(pb, 28 + 12*mxf->body_partitions_count);
put_be32(pb, 0); // BodySID of header partition
put_be64(pb, 0); // offset of header partition
for (i = 0; i < mxf->body_partitions_count; i++) {
put_be32(pb, 1); // BodySID
put_be64(pb, mxf->body_partition_offset[i]);
}
put_be32(pb, 0); // BodySID of footer partition
put_be64(pb, mxf->footer_partition_offset);
put_be32(pb, url_ftell(pb) - pos + 4);
}
static int mxf_write_footer(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
ByteIOContext *pb = s->pb;
mxf_write_klv_fill(s);
mxf->footer_partition_offset = url_ftell(pb);
mxf_write_partition(s, 0, 2, footer_partition_key, 0);
mxf_write_klv_fill(s);
mxf_write_index_table_segment(s);
mxf_write_klv_fill(s);
mxf_write_random_index_pack(s);
if (!url_is_streamed(s->pb)) {
url_fseek(pb, 0, SEEK_SET);
mxf_write_partition(s, 0, 0, header_closed_partition_key, 1);
}
ff_audio_interleave_close(s);
av_freep(&mxf->index_entries);
av_freep(&mxf->body_partition_offset);
mxf_free(s);
return 0;
}
static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, 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;
if (s->nb_streams != stream_count) {
AVPacketList *first = NULL;
// find first packet in edit unit
while (pktl) {
AVStream *st = s->streams[pktl->pkt.stream_index];
if (st->index == 0)
break;
else if (!first)
first = pktl;
pktl = pktl->next;
}
// purge packet queue
while (pktl) {
AVPacketList *next = pktl->next;
av_free_packet(&pktl->pkt);
av_freep(&pktl);
pktl = next;
}
if (!first)
goto out;
pktl = first;
}
*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);
return 1;
} else {
out:
av_init_packet(out);
return 0;
}
}
static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
{
MXFStreamContext *sc = s->streams[pkt ->stream_index]->priv_data;
MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;
return next->dts > pkt->dts ||
(next->dts == pkt->dts && sc->order < sc2->order);
}
static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
{
return ff_audio_rechunk_interleave(s, out, pkt, flush,
mxf_interleave_get_packet, mxf_compare_timestamps);
}
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,
AVFMT_NOTIMESTAMPS,
NULL,
mxf_interleave,
};
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