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5c31eaa999
FFmpeg/libavformat/mxfenc.c
Anton Khirnov 9200514ad8 lavf: replace AVStream.codec with AVStream.codecpar 
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.

In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.

There are multiple important problems with this approach:
    - the fields in AVCodecContext are in general one of
        * stream parameters
        * codec options
        * codec state
      However, it's not clear which ones are which. It is consequently
      unclear which fields are a demuxer allowed to set or a muxer allowed to
      read. This leads to erratic behaviour depending on whether decoding or
      encoding is being performed or not (and whether it uses the AVStream
      embedded codec context).
    - various synchronization issues arising from the fact that the same
      context is used by several different APIs (muxers/demuxers,
      parsers, bitstream filters and encoders/decoders) simultaneously, with
      there being no clear rules for who can modify what and the different
      processes being typically delayed with respect to each other.
    - avformat_find_stream_info() making it necessary to support opening
      and closing a single codec context multiple times, thus
      complicating the semantics of freeing various allocated objects in the
      codec context.

Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2016-02-23 17:01:58 +01:00

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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 Libav.
*
* Libav 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.
*
* Libav 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 Libav; 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
*/
#include <inttypes.h>
#include <math.h>
#include <time.h>
#include "libavutil/random_seed.h"
#include "libavutil/time_internal.h"
#include "libavcodec/bytestream.h"
#include "audiointerleave.h"
#include "avformat.h"
#include "internal.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 };
extern AVOutputFormat ff_mxf_d10_muxer;
#define EDIT_UNITS_PER_BODY 250
#define KAG_SIZE 512
typedef struct MXFLocalTagPair {
int local_tag;
UID uid;
} MXFLocalTagPair;
typedef struct MXFIndexEntry {
uint8_t flags;
uint64_t offset;
unsigned slice_offset; ///< offset of audio slice
uint16_t temporal_ref;
} MXFIndexEntry;
typedef struct MXFStreamContext {
AudioInterleaveContext aic;
UID track_essence_element_key;
int index; ///< index in mxf_essence_container_uls table
const UID *codec_ul;
int order; ///< interleaving order if dts are equal
int interlaced; ///< whether picture is interlaced
int temporal_reordering;
AVRational aspect_ratio; ///< display aspect ratio
int closed_gop; ///< gop is closed, used in mpeg-2 frame parsing
} MXFStreamContext;
typedef struct MXFContainerEssenceEntry {
UID container_ul;
UID element_ul;
UID codec_ul;
void (*write_desc)(AVFormatContext *, AVStream *);
} MXFContainerEssenceEntry;
static const struct {
enum AVCodecID id;
int index;
} mxf_essence_mappings[] = {
{ AV_CODEC_ID_MPEG2VIDEO, 0 },
{ AV_CODEC_ID_PCM_S24LE, 1 },
{ AV_CODEC_ID_PCM_S16LE, 1 },
{ AV_CODEC_ID_NONE }
};
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 void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st);
static void mxf_write_generic_sound_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 },
// D-10 625/50 PAL 50mb/s
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },
{ 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 },
mxf_write_cdci_desc },
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },
{ 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
mxf_write_generic_sound_desc },
// D-10 525/60 NTSC 50mb/s
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },
{ 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x02 },
mxf_write_cdci_desc },
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },
{ 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
mxf_write_generic_sound_desc },
// D-10 625/50 PAL 40mb/s
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },
{ 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x03 },
mxf_write_cdci_desc },
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },
{ 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
mxf_write_generic_sound_desc },
// D-10 525/60 NTSC 40mb/s
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },
{ 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x04 },
mxf_write_cdci_desc },
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },
{ 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
mxf_write_generic_sound_desc },
// D-10 625/50 PAL 30mb/s
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },
{ 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 },
mxf_write_cdci_desc },
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },
{ 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
mxf_write_generic_sound_desc },
// D-10 525/60 NTSC 30mb/s
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },
{ 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x06 },
mxf_write_cdci_desc },
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },
{ 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
mxf_write_generic_sound_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;
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 *body_partition_offset;
unsigned body_partitions_count;
int last_key_index; ///< index of last key frame
uint64_t duration;
AVStream *timecode_track;
int timecode_base; ///< rounded time code base (25 or 30)
int timecode_start; ///< frame number computed from mpeg-2 gop header timecode
int timecode_drop_frame; ///< time code use drop frame method frop mpeg-2 essence gop header
int edit_unit_byte_count; ///< fixed edit unit byte count
uint64_t body_offset;
uint32_t instance_number;
uint8_t umid[16]; ///< unique material identifier
} MXFContext;
static const uint8_t uuid_base[] = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };
static const uint8_t umid_ul[] = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x01,0x0D,0x00,0x13 };
/**
* complete key for operation pattern, partitions, and primer pack
*/
static const uint8_t op1a_ul[] = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x09,0x00 };
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 */
// Timecode Component
{ 0x1501, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x05,0x00,0x00}}, /* Start Time Code */
{ 0x1502, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x04,0x01,0x01,0x02,0x06,0x00,0x00}}, /* Rounded Time Code Base */
{ 0x1503, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x04,0x01,0x01,0x05,0x00,0x00,0x00}}, /* Drop Frame */
// 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 */
{ 0x8007, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0A,0x00,0x00}}, /* ProfileAndLevel */
// 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(AVIOContext *pb, enum MXFMetadataSetType type, int value)
{
avio_write(pb, uuid_base, 12);
avio_wb16(pb, type);
avio_wb16(pb, value);
}
static void mxf_write_umid(AVFormatContext *s, int type)
{
MXFContext *mxf = s->priv_data;
avio_write(s->pb, umid_ul, 13);
avio_wb24(s->pb, mxf->instance_number);
avio_write(s->pb, mxf->umid, 15);
avio_w8(s->pb, type);
}
static void mxf_write_refs_count(AVIOContext *pb, int ref_count)
{
avio_wb32(pb, ref_count);
avio_wb32(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(AVIOContext *pb, uint64_t len)
{
// Determine the best BER size
int size;
if (len < 128) {
//short form
avio_w8(pb, len);
return 1;
}
size = (av_log2(len) >> 3) + 1;
// long form
avio_w8(pb, 0x80 + size);
while(size) {
size--;
avio_w8(pb, len >> 8 * size & 0xff);
}
return 0;
}
static void klv_encode_ber4_length(AVIOContext *pb, int len)
{
avio_w8(pb, 0x80 + 3);
avio_wb24(pb, len);
}
/*
* Get essence container ul index
*/
static int mxf_get_essence_container_ul_index(enum AVCodecID 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)
{
AVIOContext *pb = s->pb;
int local_tag_number, i = 0;
local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);
avio_write(pb, primer_pack_key, 16);
klv_encode_ber_length(pb, local_tag_number * 18 + 8);
avio_wb32(pb, local_tag_number); // local_tag num
avio_wb32(pb, 18); // item size, always 18 according to the specs
for (i = 0; i < local_tag_number; i++) {
avio_wb16(pb, mxf_local_tag_batch[i].local_tag);
avio_write(pb, mxf_local_tag_batch[i].uid, 16);
}
}
static void mxf_write_local_tag(AVIOContext *pb, int size, int tag)
{
avio_wb16(pb, tag);
avio_wb16(pb, size);
}
static void mxf_write_metadata_key(AVIOContext *pb, unsigned int value)
{
avio_write(pb, header_metadata_key, 13);
avio_wb24(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;
AVIOContext *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++) {
MXFStreamContext *sc = s->streams[i]->priv_data;
avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
}
}
static void mxf_write_preface(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
AVIOContext *pb = s->pb;
mxf_write_metadata_key(pb, 0x012f00);
PRINT_KEY(s, "preface key", pb->buf_ptr - 16);
klv_encode_ber_length(pb, 130 + 16LL * 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);
avio_wb64(pb, mxf->timestamp);
// write version
mxf_write_local_tag(pb, 2, 0x3B05);
avio_wb16(pb, 258); // v1.2
// 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);
avio_write(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);
avio_wb64(pb, 0);
}
/*
* Write a local tag containing an ascii string as utf-16
*/
static void mxf_write_local_tag_utf16(AVIOContext *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++)
avio_wb16(pb, value[i]);
}
static void mxf_write_identification(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
AVIOContext *pb = s->pb;
const char *company = "Libav";
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->flags & AVFMT_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);
avio_wb64(pb, mxf->timestamp);
}
static void mxf_write_content_storage(AVFormatContext *s)
{
AVIOContext *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;
AVIOContext *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);
avio_wb32(pb, st->index+2);
// write track number
mxf_write_local_tag(pb, 4, 0x4804);
if (type == MaterialPackage)
avio_wb32(pb, 0); // track number of material package is 0
else
avio_write(pb, sc->track_essence_element_key + 12, 4);
mxf_write_local_tag(pb, 8, 0x4B01);
avio_wb32(pb, mxf->time_base.den);
avio_wb32(pb, mxf->time_base.num);
// write origin
mxf_write_local_tag(pb, 8, 0x4B02);
avio_wb64(pb, 0);
// write sequence refs
mxf_write_local_tag(pb, 16, 0x4803);
mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
}
static const uint8_t smpte_12m_timecode_track_data_ul[] = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x01,0x01,0x00,0x00,0x00 };
static void mxf_write_common_fields(AVFormatContext *s, AVStream *st)
{
MXFContext *mxf = s->priv_data;
AVIOContext *pb = s->pb;
// find data define uls
mxf_write_local_tag(pb, 16, 0x0201);
if (st == mxf->timecode_track)
avio_write(pb, smpte_12m_timecode_track_data_ul, 16);
else {
const MXFCodecUL *data_def_ul = mxf_get_data_definition_ul(st->codecpar->codec_type);
avio_write(pb, data_def_ul->uid, 16);
}
// write duration
mxf_write_local_tag(pb, 8, 0x0202);
avio_wb64(pb, mxf->duration);
}
static void mxf_write_sequence(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
{
MXFContext *mxf = s->priv_data;
AVIOContext *pb = s->pb;
enum MXFMetadataSetType component;
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(s, st);
// write structural component
mxf_write_local_tag(pb, 16 + 8, 0x1001);
mxf_write_refs_count(pb, 1);
if (st == mxf->timecode_track)
component = TimecodeComponent;
else
component = SourceClip;
if (type == SourcePackage)
component += TypeBottom;
mxf_write_uuid(pb, component, st->index);
}
static void mxf_write_timecode_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
{
MXFContext *mxf = s->priv_data;
AVIOContext *pb = s->pb;
mxf_write_metadata_key(pb, 0x011400);
klv_encode_ber_length(pb, 75);
// UID
mxf_write_local_tag(pb, 16, 0x3C0A);
mxf_write_uuid(pb, type == MaterialPackage ? TimecodeComponent :
TimecodeComponent + TypeBottom, st->index);
mxf_write_common_fields(s, st);
// Start Time Code
mxf_write_local_tag(pb, 8, 0x1501);
avio_wb64(pb, mxf->timecode_start);
// Rounded Time Code Base
mxf_write_local_tag(pb, 2, 0x1502);
avio_wb16(pb, mxf->timecode_base);
// Drop Frame
mxf_write_local_tag(pb, 1, 0x1503);
avio_w8(pb, mxf->timecode_drop_frame);
}
static void mxf_write_structural_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
{
AVIOContext *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(s, st);
// write start_position
mxf_write_local_tag(pb, 8, 0x1201);
avio_wb64(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++)
avio_wb64(pb, 0);
} else
mxf_write_umid(s, 1);
// write source track id
mxf_write_local_tag(pb, 4, 0x1102);
if (type == SourcePackage)
avio_wb32(pb, 0);
else
avio_wb32(pb, st->index+2);
}
static void mxf_write_multi_descriptor(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
AVIOContext *pb = s->pb;
const uint8_t *ul;
int i;
mxf_write_metadata_key(pb, 0x014400);
PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);
klv_encode_ber_length(pb, 64 + 16LL * 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);
avio_wb32(pb, mxf->time_base.den);
avio_wb32(pb, mxf->time_base.num);
// write essence container ul
mxf_write_local_tag(pb, 16, 0x3004);
if (mxf->essence_container_count > 1)
ul = multiple_desc_ul;
else {
MXFStreamContext *sc = s->streams[0]->priv_data;
ul = mxf_essence_container_uls[sc->index].container_ul;
}
avio_write(pb, 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;
AVIOContext *pb = s->pb;
avio_write(pb, key, 16);
klv_encode_ber4_length(pb, size+20+8+12+20);
mxf_write_local_tag(pb, 16, 0x3C0A);
mxf_write_uuid(pb, SubDescriptor, st->index);
mxf_write_local_tag(pb, 4, 0x3006);
avio_wb32(pb, st->index+2);
mxf_write_local_tag(pb, 8, 0x3001);
avio_wb32(pb, mxf->time_base.den);
avio_wb32(pb, mxf->time_base.num);
mxf_write_local_tag(pb, 16, 0x3004);
avio_write(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 const UID mxf_cdci_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x28,0x00 };
static const UID mxf_generic_sound_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x42,0x00 };
static void mxf_write_cdci_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
{
MXFStreamContext *sc = st->priv_data;
AVIOContext *pb = s->pb;
int stored_height = (st->codecpar->height+15)/16*16;
int display_height;
int f1, f2;
mxf_write_generic_desc(s, st, key, size+8+8+8+8+8+8+5+16+sc->interlaced*4+12+20);
mxf_write_local_tag(pb, 4, 0x3203);
avio_wb32(pb, st->codecpar->width);
mxf_write_local_tag(pb, 4, 0x3202);
avio_wb32(pb, stored_height>>sc->interlaced);
mxf_write_local_tag(pb, 4, 0x3209);
avio_wb32(pb, st->codecpar->width);
if (st->codecpar->height == 608) // PAL + VBI
display_height = 576;
else if (st->codecpar->height == 512) // NTSC + VBI
display_height = 486;
else
display_height = st->codecpar->height;
mxf_write_local_tag(pb, 4, 0x3208);
avio_wb32(pb, display_height>>sc->interlaced);
// component depth
mxf_write_local_tag(pb, 4, 0x3301);
avio_wb32(pb, 8);
// horizontal subsampling
mxf_write_local_tag(pb, 4, 0x3302);
avio_wb32(pb, 2);
// frame layout
mxf_write_local_tag(pb, 1, 0x320C);
avio_w8(pb, sc->interlaced);
// video line map
switch (st->codecpar->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);
avio_wb32(pb, sc->interlaced ? 2 : 1);
avio_wb32(pb, 4);
avio_wb32(pb, f1);
if (sc->interlaced)
avio_wb32(pb, f2);
mxf_write_local_tag(pb, 8, 0x320E);
avio_wb32(pb, sc->aspect_ratio.num);
avio_wb32(pb, sc->aspect_ratio.den);
mxf_write_local_tag(pb, 16, 0x3201);
avio_write(pb, *sc->codec_ul, 16);
}
static void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st)
{
mxf_write_cdci_common(s, st, mxf_cdci_descriptor_key, 0);
}
static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
{
AVIOContext *pb = s->pb;
int profile_and_level = (st->codecpar->profile<<4) | st->codecpar->level;
mxf_write_cdci_common(s, st, mxf_mpegvideo_descriptor_key, 8+5);
// bit rate
mxf_write_local_tag(pb, 4, 0x8000);
avio_wb32(pb, st->codecpar->bit_rate);
// profile and level
mxf_write_local_tag(pb, 1, 0x8007);
if (!st->codecpar->profile)
profile_and_level |= 0x80; // escape bit
avio_w8(pb, profile_and_level);
}
static void mxf_write_generic_sound_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
{
AVIOContext *pb = s->pb;
mxf_write_generic_desc(s, st, key, size+5+12+8+8);
// audio locked
mxf_write_local_tag(pb, 1, 0x3D02);
avio_w8(pb, 1);
// write audio sampling rate
mxf_write_local_tag(pb, 8, 0x3D03);
avio_wb32(pb, st->codecpar->sample_rate);
avio_wb32(pb, 1);
mxf_write_local_tag(pb, 4, 0x3D07);
avio_wb32(pb, st->codecpar->channels);
mxf_write_local_tag(pb, 4, 0x3D01);
avio_wb32(pb, av_get_bits_per_sample(st->codecpar->codec_id));
}
static void mxf_write_wav_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
{
AVIOContext *pb = s->pb;
mxf_write_generic_sound_common(s, st, key, size+6+8);
mxf_write_local_tag(pb, 2, 0x3D0A);
avio_wb16(pb, st->codecpar->block_align);
// avg bytes per sec
mxf_write_local_tag(pb, 4, 0x3D09);
avio_wb32(pb, st->codecpar->block_align*st->codecpar->sample_rate);
}
static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)
{
mxf_write_wav_common(s, st, mxf_wav_descriptor_key, 0);
}
static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)
{
mxf_write_wav_common(s, st, mxf_aes3_descriptor_key, 0);
}
static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st)
{
mxf_write_generic_sound_common(s, st, mxf_generic_sound_descriptor_key, 0);
}
static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)
{
MXFContext *mxf = s->priv_data;
AVIOContext *pb = s->pb;
int i, track_count = s->nb_streams+1;
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*track_count);
} else {
mxf_write_metadata_key(pb, 0x013700);
PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);
klv_encode_ber_length(pb, 112 + 16*track_count); // 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(s, type == SourcePackage);
PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);
// package creation date
mxf_write_local_tag(pb, 8, 0x4405);
avio_wb64(pb, mxf->timestamp);
// package modified date
mxf_write_local_tag(pb, 8, 0x4404);
avio_wb64(pb, mxf->timestamp);
// write track refs
mxf_write_local_tag(pb, track_count*16 + 8, 0x4403);
mxf_write_refs_count(pb, track_count);
mxf_write_uuid(pb, type == MaterialPackage ? Track :
Track + TypeBottom, -1); // timecode track
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);
}
// write timecode track
mxf_write_track(s, mxf->timecode_track, type);
mxf_write_sequence(s, mxf->timecode_track, type);
mxf_write_timecode_component(s, mxf->timecode_track, type);
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)
{
AVIOContext *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(s, 1);
mxf_write_local_tag(pb, 4, 0x3F07); // BodySID
avio_wb32(pb, 1);
mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID
avio_wb32(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 < 20) // 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;
AVIOContext *pb = s->pb;
int i, j, temporal_reordering = 0;
int key_index = mxf->last_key_index;
av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);
if (!mxf->edit_units_count && !mxf->edit_unit_byte_count)
return;
avio_write(pb, index_table_segment_key, 16);
if (mxf->edit_unit_byte_count) {
klv_encode_ber_length(pb, 80);
} else {
klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1LL)*6 +
12+mxf->edit_units_count*(11+mxf->slice_count*4LL));
}
// 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);
avio_wb32(pb, mxf->time_base.den);
avio_wb32(pb, mxf->time_base.num);
// index start position
mxf_write_local_tag(pb, 8, 0x3F0C);
avio_wb64(pb, mxf->last_indexed_edit_unit);
// index duration
mxf_write_local_tag(pb, 8, 0x3F0D);
if (mxf->edit_unit_byte_count)
avio_wb64(pb, 0); // index table covers whole container
else
avio_wb64(pb, mxf->edit_units_count);
// edit unit byte count
mxf_write_local_tag(pb, 4, 0x3F05);
avio_wb32(pb, mxf->edit_unit_byte_count);
// index sid
mxf_write_local_tag(pb, 4, 0x3F06);
avio_wb32(pb, 2);
// body sid
mxf_write_local_tag(pb, 4, 0x3F07);
avio_wb32(pb, 1);
if (!mxf->edit_unit_byte_count) {
// real slice count - 1
mxf_write_local_tag(pb, 1, 0x3F08);
avio_w8(pb, mxf->slice_count);
// delta entry array
mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);
avio_wb32(pb, s->nb_streams+1); // num of entries
avio_wb32(pb, 6); // size of one entry
// write system item delta entry
avio_w8(pb, 0);
avio_w8(pb, 0); // slice entry
avio_wb32(pb, 0); // element delta
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
MXFStreamContext *sc = st->priv_data;
avio_w8(pb, sc->temporal_reordering);
if (sc->temporal_reordering)
temporal_reordering = 1;
if (i == 0) { // video track
avio_w8(pb, 0); // slice number
avio_wb32(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);
avio_w8(pb, 1);
avio_wb32(pb, (i-1)*audio_frame_size); // element delta
}
}
mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);
avio_wb32(pb, mxf->edit_units_count); // num of entries
avio_wb32(pb, 11+mxf->slice_count*4); // size of one entry
for (i = 0; i < mxf->edit_units_count; i++) {
int temporal_offset = 0;
if (!(mxf->index_entries[i].flags & 0x33)) { // I frame
mxf->last_key_index = key_index;
key_index = i;
}
if (temporal_reordering) {
int pic_num_in_gop = i - key_index;
if (pic_num_in_gop != mxf->index_entries[i].temporal_ref) {
for (j = key_index; j < mxf->edit_units_count; j++) {
if (pic_num_in_gop == mxf->index_entries[j].temporal_ref)
break;
}
if (j == mxf->edit_units_count)
av_log(s, AV_LOG_WARNING, "missing frames\n");
temporal_offset = j - key_index - pic_num_in_gop;
}
}
avio_w8(pb, temporal_offset);
if ((mxf->index_entries[i].flags & 0x30) == 0x30) { // back and forward prediction
avio_w8(pb, mxf->last_key_index - i);
} else {
avio_w8(pb, key_index - i); // key frame offset
if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward
mxf->last_key_index = key_index;
}
if (!(mxf->index_entries[i].flags & 0x33) && // I frame
mxf->index_entries[i].flags & 0x40 && !temporal_offset)
mxf->index_entries[i].flags |= 0x80; // random access
avio_w8(pb, mxf->index_entries[i].flags);
// stream offset
avio_wb64(pb, mxf->index_entries[i].offset);
if (s->nb_streams > 1)
avio_wb32(pb, mxf->index_entries[i].slice_offset);
}
mxf->last_key_index = key_index - mxf->edit_units_count;
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(avio_tell(s->pb));
if (pad) {
avio_write(s->pb, klv_fill_key, 16);
pad -= 16 + 4;
klv_encode_ber4_length(s->pb, pad);
for (; pad; pad--)
avio_w8(s->pb, 0);
assert(!(avio_tell(s->pb) & (KAG_SIZE-1)));
}
}
static int mxf_write_partition(AVFormatContext *s, int bodysid,
int indexsid,
const uint8_t *key, int write_metadata)
{
MXFContext *mxf = s->priv_data;
AVIOContext *pb = s->pb;
int64_t header_byte_count_offset;
unsigned index_byte_count = 0;
uint64_t partition_offset = avio_tell(pb);
int err;
if (!mxf->edit_unit_byte_count && mxf->edit_units_count)
index_byte_count = 85 + 12+(s->nb_streams+1)*6 +
12+mxf->edit_units_count*(11+mxf->slice_count*4);
else if (mxf->edit_unit_byte_count && indexsid)
index_byte_count = 80;
if (index_byte_count) {
// 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)) {
if ((err = av_reallocp_array(&mxf->body_partition_offset, mxf->body_partitions_count + 1,
sizeof(*mxf->body_partition_offset))) < 0) {
mxf->body_partitions_count = 0;
return err;
}
mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;
}
// write klv
avio_write(pb, key, 16);
klv_encode_ber_length(pb, 88 + 16LL * mxf->essence_container_count);
// write partition value
avio_wb16(pb, 1); // majorVersion
avio_wb16(pb, 2); // minorVersion
avio_wb32(pb, KAG_SIZE); // KAGSize
avio_wb64(pb, partition_offset); // ThisPartition
if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)
avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition
else if (!memcmp(key, footer_partition_key, 16) && mxf->body_partitions_count)
avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition
else
avio_wb64(pb, 0);
avio_wb64(pb, mxf->footer_partition_offset); // footerPartition
// set offset
header_byte_count_offset = avio_tell(pb);
avio_wb64(pb, 0); // headerByteCount, update later
// indexTable
avio_wb64(pb, index_byte_count); // indexByteCount
avio_wb32(pb, index_byte_count ? indexsid : 0); // indexSID
// BodyOffset
if (bodysid && mxf->edit_units_count && mxf->body_partitions_count) {
avio_wb64(pb, mxf->body_offset);
} else
avio_wb64(pb, 0);
avio_wb32(pb, bodysid); // bodySID
// operational pattern
avio_write(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 = avio_tell(s->pb);
mxf_write_primer_pack(s);
mxf_write_header_metadata_sets(s);
pos = avio_tell(s->pb);
header_byte_count = pos - start + klv_fill_size(pos);
// update header_byte_count
avio_seek(pb, header_byte_count_offset, SEEK_SET);
avio_wb64(pb, header_byte_count);
avio_seek(pb, pos, SEEK_SET);
}
avio_flush(pb);
return 0;
}
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
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x05,0x02,0x00 }, // MP@H-14 I-Frame
{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x05,0x03,0x00 }, // MP@H-14 Long GOP
};
static const UID *mxf_get_mpeg2_codec_ul(AVCodecParameters *par)
{
int long_gop = 1;
if (par->profile == 4) { // Main
if (par->level == 8) // Main
return &mxf_mpeg2_codec_uls[0+long_gop];
else if (par->level == 4) // High
return &mxf_mpeg2_codec_uls[4+long_gop];
else if (par->level == 6) // High 14
return &mxf_mpeg2_codec_uls[8+long_gop];
} else if (par->profile == 0) { // 422
if (par->level == 5) // Main
return &mxf_mpeg2_codec_uls[2+long_gop];
else if (par->level == 2) // High
return &mxf_mpeg2_codec_uls[6+long_gop];
}
return NULL;
}
static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st,
AVPacket *pkt, MXFIndexEntry *e)
{
MXFStreamContext *sc = st->priv_data;
MXFContext *mxf = s->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 ((pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
st->codecpar->profile = pkt->data[i+1] & 0x07;
st->codecpar->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 (pkt->data[i+4]>>6 & 0x01) { // closed
sc->closed_gop = 1;
if (e->flags & 0x40) // sequence header present
e->flags |= 0x80; // random access
}
if (!mxf->header_written) {
unsigned hours = (pkt->data[i+1]>>2) & 0x1f;
unsigned minutes = ((pkt->data[i+1] & 0x03) << 4) | (pkt->data[i+2]>>4);
unsigned seconds = ((pkt->data[i+2] & 0x07) << 3) | (pkt->data[i+3]>>5);
unsigned frames = ((pkt->data[i+3] & 0x1f) << 1) | (pkt->data[i+4]>>7);
mxf->timecode_drop_frame = !!(pkt->data[i+1] & 0x80);
mxf->timecode_start = (hours*3600 + minutes*60 + seconds) *
mxf->timecode_base + frames;
if (mxf->timecode_drop_frame) {
unsigned tminutes = 60 * hours + minutes;
mxf->timecode_start -= 2 * (tminutes - tminutes / 10);
}
av_log(s, AV_LOG_DEBUG, "frame %d %d:%d:%d%c%d\n", mxf->timecode_start,
hours, minutes, seconds, mxf->timecode_drop_frame ? ';':':', frames);
}
} else if (c == 0x1b3) { // seq
e->flags |= 0x40;
switch ((pkt->data[i+4]>>4) & 0xf) {
case 2: sc->aspect_ratio = (AVRational){ 4, 3}; break;
case 3: sc->aspect_ratio = (AVRational){ 16, 9}; break;
case 4: sc->aspect_ratio = (AVRational){221,100}; break;
default:
av_reduce(&sc->aspect_ratio.num, &sc->aspect_ratio.den,
st->codecpar->width, st->codecpar->height, 1024*1024);
}
} else if (c == 0x100) { // pic
int pict_type = (pkt->data[i+2]>>3) & 0x07;
e->temporal_ref = (pkt->data[i+1]<<2) | (pkt->data[i+2]>>6);
if (pict_type == 2) { // P frame
e->flags |= 0x22;
sc->closed_gop = 0; // reset closed gop, don't matter anymore
} else if (pict_type == 3) { // B frame
if (sc->closed_gop)
e->flags |= 0x13; // only backward prediction
else
e->flags |= 0x33;
sc->temporal_reordering = -1;
} else if (!pict_type) {
av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");
return 0;
}
}
}
if (s->oformat != &ff_mxf_d10_muxer)
sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codecpar);
return !!sc->codec_ul;
}
static uint64_t mxf_parse_timestamp(time_t timestamp)
{
struct tm tmbuf;
struct tm *time = gmtime_r(&timestamp, &tmbuf);
if (!time)
return 0;
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 void mxf_gen_umid(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
uint32_t seed = av_get_random_seed();
uint64_t umid = seed + 0x5294713400000000LL;
AV_WB64(mxf->umid , umid);
AV_WB64(mxf->umid+8, umid>>8);
mxf->instance_number = seed;
}
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;
AVDictionaryEntry *t;
int64_t timestamp = 0;
if (!s->nb_streams)
return -1;
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->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
if (i != 0) {
av_log(s, AV_LOG_ERROR, "video stream must be first track\n");
return -1;
}
// TODO: should be avg_frame_rate
if (fabs(av_q2d(st->time_base) - 1/25.0) < 0.0001) {
samples_per_frame = PAL_samples_per_frame;
mxf->time_base = (AVRational){ 1, 25 };
mxf->timecode_base = 25;
} else if (fabs(av_q2d(st->time_base) - 1001/30000.0) < 0.0001) {
samples_per_frame = NTSC_samples_per_frame;
mxf->time_base = (AVRational){ 1001, 30000 };
mxf->timecode_base = 30;
} else {
av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");
return -1;
}
avpriv_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);
if (s->oformat == &ff_mxf_d10_muxer) {
if (st->codecpar->bit_rate == 50000000)
if (mxf->time_base.den == 25) sc->index = 3;
else sc->index = 5;
else if (st->codecpar->bit_rate == 40000000)
if (mxf->time_base.den == 25) sc->index = 7;
else sc->index = 9;
else if (st->codecpar->bit_rate == 30000000)
if (mxf->time_base.den == 25) sc->index = 11;
else sc->index = 13;
else {
av_log(s, AV_LOG_ERROR, "error MXF D-10 only support 30/40/50 mbit/s\n");
return -1;
}
mxf->edit_unit_byte_count = KAG_SIZE; // system element
mxf->edit_unit_byte_count += 16 + 4 + (uint64_t)st->codecpar->bit_rate *
mxf->time_base.num / (8*mxf->time_base.den);
mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);
mxf->edit_unit_byte_count += 16 + 4 + 4 + samples_per_frame[0]*8*4;
mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);
}
} else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
if (st->codecpar->sample_rate != 48000) {
av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");
return -1;
}
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
if (s->oformat == &ff_mxf_d10_muxer) {
if (st->index != 1) {
av_log(s, AV_LOG_ERROR, "MXF D-10 only support one audio track\n");
return -1;
}
if (st->codecpar->codec_id != AV_CODEC_ID_PCM_S16LE &&
st->codecpar->codec_id != AV_CODEC_ID_PCM_S24LE) {
av_log(s, AV_LOG_ERROR, "MXF D-10 only support 16 or 24 bits le audio\n");
}
sc->index = ((MXFStreamContext*)s->streams[0]->priv_data)->index + 1;
} else
mxf->slice_count = 1;
}
if (!sc->index) {
sc->index = mxf_get_essence_container_ul_index(st->codecpar->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;
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);
if (!present[sc->index])
mxf->essence_container_count++;
present[sc->index]++;
}
if (s->oformat == &ff_mxf_d10_muxer) {
mxf->essence_container_count = 1;
}
if (!(s->flags & AVFMT_FLAG_BITEXACT))
mxf_gen_umid(s);
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);
}
if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))
timestamp = ff_iso8601_to_unix_time(t->value);
if (timestamp)
mxf->timestamp = mxf_parse_timestamp(timestamp);
mxf->duration = -1;
mxf->timecode_track = av_mallocz(sizeof(*mxf->timecode_track));
if (!mxf->timecode_track)
return AVERROR(ENOMEM);
mxf->timecode_track->priv_data = av_mallocz(sizeof(MXFStreamContext));
if (!mxf->timecode_track->priv_data)
return AVERROR(ENOMEM);
mxf->timecode_track->index = -1;
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 framenum_to_12m_time_code(unsigned frame, int drop, int fps)
{
return (0 << 31) | // color frame flag
(drop << 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 (NTSC), 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;
AVIOContext *pb = s->pb;
unsigned frame;
uint32_t time_code;
frame = mxf->timecode_start + mxf->last_indexed_edit_unit + mxf->edit_units_count;
// write system metadata pack
avio_write(pb, system_metadata_pack_key, 16);
klv_encode_ber4_length(pb, 57);
avio_w8(pb, 0x5c); // UL, user date/time stamp, picture and sound item present
avio_w8(pb, 0x04); // content package rate
avio_w8(pb, 0x00); // content package type
avio_wb16(pb, 0x00); // channel handle
avio_wb16(pb, frame); // continuity count
if (mxf->essence_container_count > 1)
avio_write(pb, multiple_desc_ul, 16);
else {
MXFStreamContext *sc = s->streams[0]->priv_data;
avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
}
avio_w8(pb, 0);
avio_wb64(pb, 0);
avio_wb64(pb, 0); // creation date/time stamp
avio_w8(pb, 0x81); // SMPTE 12M time code
time_code = framenum_to_12m_time_code(frame, mxf->timecode_drop_frame,
mxf->timecode_base);
avio_wb32(pb, time_code);
avio_wb32(pb, 0); // binary group data
avio_wb64(pb, 0);
// write system metadata package set
avio_write(pb, system_metadata_package_set_key, 16);
klv_encode_ber4_length(pb, 35);
avio_w8(pb, 0x83); // UMID
avio_wb16(pb, 0x20);
mxf_write_umid(s, 1);
}
static void mxf_write_d10_video_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
{
MXFContext *mxf = s->priv_data;
AVIOContext *pb = s->pb;
int packet_size = (uint64_t)st->codecpar->bit_rate*mxf->time_base.num /
(8*mxf->time_base.den); // frame size
int pad;
packet_size += 16 + 4;
packet_size += klv_fill_size(packet_size);
klv_encode_ber4_length(pb, pkt->size);
avio_write(pb, pkt->data, pkt->size);
// ensure CBR muxing by padding to correct video frame size
pad = packet_size - pkt->size - 16 - 4;
if (pad > 20) {
avio_write(s->pb, klv_fill_key, 16);
pad -= 16 + 4;
klv_encode_ber4_length(s->pb, pad);
for (; pad; pad--)
avio_w8(s->pb, 0);
assert(!(avio_tell(s->pb) & (KAG_SIZE-1)));
} else {
av_log(s, AV_LOG_WARNING, "cannot fill d-10 video packet\n");
for (; pad > 0; pad--)
avio_w8(s->pb, 0);
}
}
static void mxf_write_d10_audio_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
{
MXFContext *mxf = s->priv_data;
AVIOContext *pb = s->pb;
int frame_size = pkt->size / st->codecpar->block_align;
uint8_t *samples = pkt->data;
uint8_t *end = pkt->data + pkt->size;
int i;
klv_encode_ber4_length(pb, 4 + frame_size*4*8);
avio_w8(pb, (frame_size == 1920 ? 0 : (mxf->edit_units_count-1) % 5 + 1));
avio_wl16(pb, frame_size);
avio_w8(pb, (1<<st->codecpar->channels)-1);
while (samples < end) {
for (i = 0; i < st->codecpar->channels; i++) {
uint32_t sample;
if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S24LE) {
sample = AV_RL24(samples)<< 4;
samples += 3;
} else {
sample = AV_RL16(samples)<<12;
samples += 2;
}
avio_wl32(pb, sample | i);
}
for (; i < 8; i++)
avio_wl32(pb, i);
}
}
static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
{
MXFContext *mxf = s->priv_data;
AVIOContext *pb = s->pb;
AVStream *st = s->streams[pkt->stream_index];
MXFStreamContext *sc = st->priv_data;
MXFIndexEntry ie = {0};
int err;
if (!mxf->edit_unit_byte_count && !(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {
if ((err = av_reallocp_array(&mxf->index_entries, mxf->edit_units_count
+ EDIT_UNITS_PER_BODY, sizeof(*mxf->index_entries))) < 0) {
mxf->edit_units_count = 0;
av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");
return err;
}
}
if (st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
if (!mxf_parse_mpeg2_frame(s, st, pkt, &ie)) {
av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
return -1;
}
}
if (!mxf->header_written) {
if (mxf->edit_unit_byte_count) {
if ((err = mxf_write_partition(s, 1, 2, header_open_partition_key, 1)) < 0)
return err;
mxf_write_klv_fill(s);
mxf_write_index_table_segment(s);
} else {
if ((err = mxf_write_partition(s, 0, 0, header_open_partition_key, 1)) < 0)
return err;
}
mxf->header_written = 1;
}
if (st->index == 0) {
if (!mxf->edit_unit_byte_count &&
(!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&
!(ie.flags & 0x33)) { // I frame, Gop start
mxf_write_klv_fill(s);
if ((err = mxf_write_partition(s, 1, 2, body_partition_key, 0)) < 0)
return err;
mxf_write_klv_fill(s);
mxf_write_index_table_segment(s);
}
mxf_write_klv_fill(s);
mxf_write_system_item(s);
if (!mxf->edit_unit_byte_count) {
mxf->index_entries[mxf->edit_units_count].offset = mxf->body_offset;
mxf->index_entries[mxf->edit_units_count].flags = ie.flags;
mxf->index_entries[mxf->edit_units_count].temporal_ref = ie.temporal_ref;
mxf->body_offset += KAG_SIZE; // size of system element
}
mxf->edit_units_count++;
} else if (!mxf->edit_unit_byte_count && st->index == 1) {
mxf->index_entries[mxf->edit_units_count-1].slice_offset =
mxf->body_offset - mxf->index_entries[mxf->edit_units_count-1].offset;
}
mxf_write_klv_fill(s);
avio_write(pb, sc->track_essence_element_key, 16); // write key
if (s->oformat == &ff_mxf_d10_muxer) {
if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
mxf_write_d10_video_packet(s, st, pkt);
else
mxf_write_d10_audio_packet(s, st, pkt);
} else {
klv_encode_ber4_length(pb, pkt->size); // write length
avio_write(pb, pkt->data, pkt->size);
mxf->body_offset += 16+4+pkt->size + klv_fill_size(16+4+pkt->size);
}
avio_flush(pb);
return 0;
}
static void mxf_write_random_index_pack(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
AVIOContext *pb = s->pb;
uint64_t pos = avio_tell(pb);
int i;
avio_write(pb, random_index_pack_key, 16);
klv_encode_ber_length(pb, 28 + 12LL*mxf->body_partitions_count);
if (mxf->edit_unit_byte_count)
avio_wb32(pb, 1); // BodySID of header partition
else
avio_wb32(pb, 0);
avio_wb64(pb, 0); // offset of header partition
for (i = 0; i < mxf->body_partitions_count; i++) {
avio_wb32(pb, 1); // BodySID
avio_wb64(pb, mxf->body_partition_offset[i]);
}
avio_wb32(pb, 0); // BodySID of footer partition
avio_wb64(pb, mxf->footer_partition_offset);
avio_wb32(pb, avio_tell(pb) - pos + 4);
}
static int mxf_write_footer(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
AVIOContext *pb = s->pb;
int err;
mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;
mxf_write_klv_fill(s);
mxf->footer_partition_offset = avio_tell(pb);
if (mxf->edit_unit_byte_count) { // no need to repeat index
if ((err = mxf_write_partition(s, 0, 0, footer_partition_key, 0)) < 0)
return err;
} else {
if ((err = mxf_write_partition(s, 0, 2, footer_partition_key, 0)) < 0)
return err;
mxf_write_klv_fill(s);
mxf_write_index_table_segment(s);
}
mxf_write_klv_fill(s);
mxf_write_random_index_pack(s);
if (s->pb->seekable) {
avio_seek(pb, 0, SEEK_SET);
if (mxf->edit_unit_byte_count) {
if ((err = mxf_write_partition(s, 1, 2, header_closed_partition_key, 1)) < 0)
return err;
mxf_write_klv_fill(s);
mxf_write_index_table_segment(s);
} else {
if ((err = mxf_write_partition(s, 0, 0, header_closed_partition_key, 1)) < 0)
return err;
}
}
ff_audio_interleave_close(s);
av_freep(&mxf->index_entries);
av_freep(&mxf->body_partition_offset);
av_freep(&mxf->timecode_track->priv_data);
av_freep(&mxf->timecode_track);
mxf_free(s);
return 0;
}
static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
{
int i, stream_count = 0;
for (i = 0; i < s->nb_streams; i++)
stream_count += !!s->streams[i]->last_in_packet_buffer;
if (stream_count && (s->nb_streams == stream_count || flush)) {
AVPacketList *pktl = s->internal->packet_buffer;
if (s->nb_streams != stream_count) {
AVPacketList *last = NULL;
// find last packet in edit unit
while (pktl) {
if (!stream_count || pktl->pkt.stream_index == 0)
break;
last = pktl;
pktl = pktl->next;
stream_count--;
}
// purge packet queue
while (pktl) {
AVPacketList *next = pktl->next;
if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)
s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;
av_packet_unref(&pktl->pkt);
av_freep(&pktl);
pktl = next;
}
if (last)
last->next = NULL;
else {
s->internal->packet_buffer = NULL;
s->internal->packet_buffer_end= NULL;
goto out;
}
pktl = s->internal->packet_buffer;
}
*out = pktl->pkt;
av_log(s, AV_LOG_TRACE, "out st:%d dts:%"PRId64"\n", (*out).stream_index, (*out).dts);
s->internal->packet_buffer = pktl->next;
if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)
s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;
if(!s->internal->packet_buffer)
s->internal->packet_buffer_end= NULL;
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 ff_mxf_muxer = {
.name = "mxf",
.long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
.mime_type = "application/mxf",
.extensions = "mxf",
.priv_data_size = sizeof(MXFContext),
.audio_codec = AV_CODEC_ID_PCM_S16LE,
.video_codec = AV_CODEC_ID_MPEG2VIDEO,
.write_header = mxf_write_header,
.write_packet = mxf_write_packet,
.write_trailer = mxf_write_footer,
.flags = AVFMT_NOTIMESTAMPS,
.interleave_packet = mxf_interleave,
};
AVOutputFormat ff_mxf_d10_muxer = {
.name = "mxf_d10",
.long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format) D-10 Mapping"),
.mime_type = "application/mxf",
.priv_data_size = sizeof(MXFContext),
.audio_codec = AV_CODEC_ID_PCM_S16LE,
.video_codec = AV_CODEC_ID_MPEG2VIDEO,
.write_header = mxf_write_header,
.write_packet = mxf_write_packet,
.write_trailer = mxf_write_footer,
.flags = AVFMT_NOTIMESTAMPS,
.interleave_packet = mxf_interleave,
};
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