git.sesse.net Git - ffmpeg/blob - libavformat/mxfenc.c

   1 /*
   2  * MXF muxer
   3  * Copyright (c) 2008 GUCAS, Zhentan Feng <spyfeng at gmail dot com>
   4  * Copyright (c) 2008 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 /*
  24  * References
  25  * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
  26  * SMPTE 377M MXF File Format Specifications
  27  * SMPTE 379M MXF Generic Container
  28  * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
  29  * SMPTE RP210: SMPTE Metadata Dictionary
  30  * SMPTE RP224: Registry of SMPTE Universal Labels
  31  */
  32
  33 //#define DEBUG
  34
  35 #include <math.h>
  36 #include <time.h>
  37
  38 #include "libavutil/opt.h"
  39 #include "libavutil/random_seed.h"
  40 #include "libavutil/timecode.h"
  41 #include "libavcodec/bytestream.h"
  42 #include "audiointerleave.h"
  43 #include "avformat.h"
  44 #include "internal.h"
  45 #include "mxf.h"
  46
  47 static const int NTSC_samples_per_frame[]    = { 1602, 1601, 1602, 1601, 1602, 0 };
  48 static const int NTSC_60_samples_per_frame[] = { 801, 801, 801, 801, 800, 0 };
  49 static const int PAL_samples_per_frame[]     = { 1920, 0 };
  50 static const int PAL_50_samples_per_frame[]  = { 960, 0 };
  51
  52 extern AVOutputFormat ff_mxf_d10_muxer;
  53
  54 #define EDIT_UNITS_PER_BODY 250
  55 #define KAG_SIZE 512
  56
  57 typedef struct {
  58     int local_tag;
  59     UID uid;
  60 } MXFLocalTagPair;
  61
  62 typedef struct {
  63     uint8_t flags;
  64     uint64_t offset;
  65     unsigned slice_offset; ///< offset of audio slice
  66     uint16_t temporal_ref;
  67 } MXFIndexEntry;
  68
  69 typedef struct {
  70     AudioInterleaveContext aic;
  71     UID track_essence_element_key;
  72     int index;               ///< index in mxf_essence_container_uls table
  73     const UID *codec_ul;
  74     int order;               ///< interleaving order if dts are equal
  75     int interlaced;          ///< whether picture is interlaced
  76     int temporal_reordering;
  77     AVRational aspect_ratio; ///< display aspect ratio
  78     int closed_gop;          ///< gop is closed, used in mpeg-2 frame parsing
  79 } MXFStreamContext;
  80
  81 typedef struct {
  82     UID container_ul;
  83     UID element_ul;
  84     UID codec_ul;
  85     void (*write_desc)(AVFormatContext *, AVStream *);
  86 } MXFContainerEssenceEntry;
  87
  88 static const struct {
  89     enum CodecID id;
  90     int index;
  91 } mxf_essence_mappings[] = {
  92     { CODEC_ID_MPEG2VIDEO, 0 },
  93     { CODEC_ID_PCM_S24LE,  1 },
  94     { CODEC_ID_PCM_S16LE,  1 },
  95     { CODEC_ID_NONE }
  96 };
  97
  98 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st);
  99 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st);
 100 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st);
 101 static void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st);
 102 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st);
 103
 104 static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {
 105     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },
 106       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },
 107       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },
 108       mxf_write_mpegvideo_desc },
 109     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },
 110       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },
 111       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 112       mxf_write_aes3_desc },
 113     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },
 114       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },
 115       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 116       mxf_write_wav_desc },
 117     // D-10 625/50 PAL 50mb/s
 118     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },
 119       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 120       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 },
 121       mxf_write_cdci_desc },
 122     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },
 123       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 124       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 125       mxf_write_generic_sound_desc },
 126     // D-10 525/60 NTSC 50mb/s
 127     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },
 128       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 129       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x02 },
 130       mxf_write_cdci_desc },
 131     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },
 132       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 133       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 134       mxf_write_generic_sound_desc },
 135     // D-10 625/50 PAL 40mb/s
 136     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },
 137       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 138       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x03 },
 139       mxf_write_cdci_desc },
 140     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },
 141       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 142       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 143       mxf_write_generic_sound_desc },
 144     // D-10 525/60 NTSC 40mb/s
 145     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },
 146       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 147       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x04 },
 148       mxf_write_cdci_desc },
 149     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },
 150       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 151       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 152       mxf_write_generic_sound_desc },
 153     // D-10 625/50 PAL 30mb/s
 154     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },
 155       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 156       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 },
 157       mxf_write_cdci_desc },
 158     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },
 159       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 160       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 161       mxf_write_generic_sound_desc },
 162     // D-10 525/60 NTSC 30mb/s
 163     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },
 164       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 165       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x06 },
 166       mxf_write_cdci_desc },
 167     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },
 168       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 169       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 170       mxf_write_generic_sound_desc },
 171     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
 172       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
 173       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
 174       NULL },
 175 };
 176
 177 typedef struct MXFContext {
 178     AVClass *av_class;
 179     int64_t footer_partition_offset;
 180     int essence_container_count;
 181     AVRational time_base;
 182     int header_written;
 183     MXFIndexEntry *index_entries;
 184     unsigned edit_units_count;
 185     uint64_t timestamp;   ///< timestamp, as year(16),month(8),day(8),hour(8),minutes(8),msec/4(8)
 186     uint8_t slice_count;  ///< index slice count minus 1 (1 if no audio, 0 otherwise)
 187     int last_indexed_edit_unit;
 188     uint64_t *body_partition_offset;
 189     unsigned body_partitions_count;
 190     int last_key_index;  ///< index of last key frame
 191     uint64_t duration;
 192     char *tc_opt_str;    ///< timecode option string
 193     AVTimecode tc;       ///< timecode context
 194     AVStream *timecode_track;
 195     int timecode_base;       ///< rounded time code base (25 or 30)
 196     int edit_unit_byte_count; ///< fixed edit unit byte count
 197     uint64_t body_offset;
 198     uint32_t instance_number;
 199     uint8_t umid[16];        ///< unique material identifier
 200 } MXFContext;
 201
 202 static const uint8_t uuid_base[]            = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };
 203 static const uint8_t umid_ul[]              = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x01,0x0D,0x00,0x13 };
 204
 205 /**
 206  * complete key for operation pattern, partitions, and primer pack
 207  */
 208 static const uint8_t op1a_ul[]                     = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x09,0x00 };
 209 static const uint8_t footer_partition_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }; // ClosedComplete
 210 static const uint8_t primer_pack_key[]             = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x05,0x01,0x00 };
 211 static const uint8_t index_table_segment_key[]     = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 };
 212 static const uint8_t random_index_pack_key[]       = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
 213 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
 214 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
 215 static const uint8_t klv_fill_key[]                = { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x03,0x01,0x02,0x10,0x01,0x00,0x00,0x00 };
 216 static const uint8_t body_partition_key[]          = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }; // ClosedComplete
 217
 218 /**
 219  * partial key for header metadata
 220  */
 221 static const uint8_t header_metadata_key[]  = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01 };
 222 static const uint8_t multiple_desc_ul[]     = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x0D,0x01,0x03,0x01,0x02,0x7F,0x01,0x00 };
 223
 224 /**
 225  * SMPTE RP210 http://www.smpte-ra.org/mdd/index.html
 226  */
 227 static const MXFLocalTagPair mxf_local_tag_batch[] = {
 228     // preface set
 229     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */
 230     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */
 231     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */
 232     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */
 233     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */
 234     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */
 235     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */
 236     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */
 237     // Identification
 238     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */
 239     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */
 240     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */
 241     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */
 242     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */
 243     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */
 244     // Content Storage
 245     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */
 246     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */
 247     // Essence Container Data
 248     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */
 249     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */
 250     // Package
 251     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */
 252     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */
 253     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */
 254     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */
 255     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */
 256     // Track
 257     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */
 258     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */
 259     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */
 260     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */
 261     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */
 262     // Sequence
 263     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */
 264     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */
 265     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */
 266     // Source Clip
 267     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */
 268     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */
 269     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */
 270     // Timecode Component
 271     { 0x1501, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x05,0x00,0x00}}, /* Start Time Code */
 272     { 0x1502, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x04,0x01,0x01,0x02,0x06,0x00,0x00}}, /* Rounded Time Code Base */
 273     { 0x1503, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x04,0x01,0x01,0x05,0x00,0x00,0x00}}, /* Drop Frame */
 274     // File Descriptor
 275     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */
 276     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */
 277     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */
 278     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */
 279     // Generic Picture Essence Descriptor
 280     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */
 281     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */
 282     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */
 283     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */
 284     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */
 285     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */
 286     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */
 287     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */
 288     // CDCI Picture Essence Descriptor
 289     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */
 290     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */
 291     // Generic Sound Essence Descriptor
 292     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */
 293     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */
 294     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */
 295     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */
 296     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */
 297     // Index Table Segment
 298     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */
 299     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */
 300     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */
 301     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */
 302     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */
 303     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */
 304     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */
 305     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */
 306     // MPEG video Descriptor
 307     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */
 308     { 0x8007, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0A,0x00,0x00}}, /* ProfileAndLevel */
 309     // Wave Audio Essence Descriptor
 310     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */
 311     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */
 312 };
 313
 314 static void mxf_write_uuid(AVIOContext *pb, enum MXFMetadataSetType type, int value)
 315 {
 316     avio_write(pb, uuid_base, 12);
 317     avio_wb16(pb, type);
 318     avio_wb16(pb, value);
 319 }
 320
 321 static void mxf_write_umid(AVFormatContext *s, int type)
 322 {
 323     MXFContext *mxf = s->priv_data;
 324     avio_write(s->pb, umid_ul, 13);
 325     avio_wb24(s->pb, mxf->instance_number);
 326     avio_write(s->pb, mxf->umid, 15);
 327     avio_w8(s->pb, type);
 328 }
 329
 330 static void mxf_write_refs_count(AVIOContext *pb, int ref_count)
 331 {
 332     avio_wb32(pb, ref_count);
 333     avio_wb32(pb, 16);
 334 }
 335
 336 static int klv_ber_length(uint64_t len)
 337 {
 338     if (len < 128)
 339         return 1;
 340     else
 341         return (av_log2(len) >> 3) + 2;
 342 }
 343
 344 static int klv_encode_ber_length(AVIOContext *pb, uint64_t len)
 345 {
 346     // Determine the best BER size
 347     int size;
 348     if (len < 128) {
 349         //short form
 350         avio_w8(pb, len);
 351         return 1;
 352     }
 353
 354     size = (av_log2(len) >> 3) + 1;
 355
 356     // long form
 357     avio_w8(pb, 0x80 + size);
 358     while(size) {
 359         size--;
 360         avio_w8(pb, len >> 8 * size & 0xff);
 361     }
 362     return 0;
 363 }
 364
 365 static void klv_encode_ber4_length(AVIOContext *pb, int len)
 366 {
 367     avio_w8(pb, 0x80 + 3);
 368     avio_wb24(pb, len);
 369 }
 370
 371 /*
 372  * Get essence container ul index
 373  */
 374 static int mxf_get_essence_container_ul_index(enum CodecID id)
 375 {
 376     int i;
 377     for (i = 0; mxf_essence_mappings[i].id; i++)
 378         if (mxf_essence_mappings[i].id == id)
 379             return mxf_essence_mappings[i].index;
 380     return -1;
 381 }
 382
 383 static void mxf_write_primer_pack(AVFormatContext *s)
 384 {
 385     AVIOContext *pb = s->pb;
 386     int local_tag_number, i = 0;
 387
 388     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);
 389
 390     avio_write(pb, primer_pack_key, 16);
 391     klv_encode_ber_length(pb, local_tag_number * 18 + 8);
 392
 393     avio_wb32(pb, local_tag_number); // local_tag num
 394     avio_wb32(pb, 18); // item size, always 18 according to the specs
 395
 396     for (i = 0; i < local_tag_number; i++) {
 397         avio_wb16(pb, mxf_local_tag_batch[i].local_tag);
 398         avio_write(pb, mxf_local_tag_batch[i].uid, 16);
 399     }
 400 }
 401
 402 static void mxf_write_local_tag(AVIOContext *pb, int size, int tag)
 403 {
 404     avio_wb16(pb, tag);
 405     avio_wb16(pb, size);
 406 }
 407
 408 static void mxf_write_metadata_key(AVIOContext *pb, unsigned int value)
 409 {
 410     avio_write(pb, header_metadata_key, 13);
 411     avio_wb24(pb, value);
 412 }
 413
 414 static void mxf_free(AVFormatContext *s)
 415 {
 416     int i;
 417
 418     for (i = 0; i < s->nb_streams; i++) {
 419         AVStream *st = s->streams[i];
 420         av_freep(&st->priv_data);
 421     }
 422 }
 423
 424 static const MXFCodecUL *mxf_get_data_definition_ul(int type)
 425 {
 426     const MXFCodecUL *uls = ff_mxf_data_definition_uls;
 427     while (uls->uid[0]) {
 428         if (type == uls->id)
 429             break;
 430         uls++;
 431     }
 432     return uls;
 433 }
 434
 435 static void mxf_write_essence_container_refs(AVFormatContext *s)
 436 {
 437     MXFContext *c = s->priv_data;
 438     AVIOContext *pb = s->pb;
 439     int i;
 440
 441     mxf_write_refs_count(pb, c->essence_container_count);
 442     av_log(s,AV_LOG_DEBUG, "essence container count:%d\n", c->essence_container_count);
 443     for (i = 0; i < c->essence_container_count; i++) {
 444         MXFStreamContext *sc = s->streams[i]->priv_data;
 445         avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
 446     }
 447 }
 448
 449 static void mxf_write_preface(AVFormatContext *s)
 450 {
 451     MXFContext *mxf = s->priv_data;
 452     AVIOContext *pb = s->pb;
 453
 454     mxf_write_metadata_key(pb, 0x012f00);
 455     PRINT_KEY(s, "preface key", pb->buf_ptr - 16);
 456     klv_encode_ber_length(pb, 130 + 16 * mxf->essence_container_count);
 457
 458     // write preface set uid
 459     mxf_write_local_tag(pb, 16, 0x3C0A);
 460     mxf_write_uuid(pb, Preface, 0);
 461     PRINT_KEY(s, "preface uid", pb->buf_ptr - 16);
 462
 463     // last modified date
 464     mxf_write_local_tag(pb, 8, 0x3B02);
 465     avio_wb64(pb, mxf->timestamp);
 466
 467     // write version
 468     mxf_write_local_tag(pb, 2, 0x3B05);
 469     avio_wb16(pb, 258); // v1.2
 470
 471     // write identification_refs
 472     mxf_write_local_tag(pb, 16 + 8, 0x3B06);
 473     mxf_write_refs_count(pb, 1);
 474     mxf_write_uuid(pb, Identification, 0);
 475
 476     // write content_storage_refs
 477     mxf_write_local_tag(pb, 16, 0x3B03);
 478     mxf_write_uuid(pb, ContentStorage, 0);
 479
 480     // operational pattern
 481     mxf_write_local_tag(pb, 16, 0x3B09);
 482     avio_write(pb, op1a_ul, 16);
 483
 484     // write essence_container_refs
 485     mxf_write_local_tag(pb, 8 + 16 * mxf->essence_container_count, 0x3B0A);
 486     mxf_write_essence_container_refs(s);
 487
 488     // write dm_scheme_refs
 489     mxf_write_local_tag(pb, 8, 0x3B0B);
 490     avio_wb64(pb, 0);
 491 }
 492
 493 /*
 494  * Write a local tag containing an ascii string as utf-16
 495  */
 496 static void mxf_write_local_tag_utf16(AVIOContext *pb, int tag, const char *value)
 497 {
 498     int i, size = strlen(value);
 499     mxf_write_local_tag(pb, size*2, tag);
 500     for (i = 0; i < size; i++)
 501         avio_wb16(pb, value[i]);
 502 }
 503
 504 static void mxf_write_identification(AVFormatContext *s)
 505 {
 506     MXFContext *mxf = s->priv_data;
 507     AVIOContext *pb = s->pb;
 508     const char *company = "FFmpeg";
 509     const char *product = "OP1a Muxer";
 510     const char *version;
 511     int length;
 512
 513     mxf_write_metadata_key(pb, 0x013000);
 514     PRINT_KEY(s, "identification key", pb->buf_ptr - 16);
 515
 516     version = s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT ?
 517         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);
 518     length = 84 + (strlen(company)+strlen(product)+strlen(version))*2; // utf-16
 519     klv_encode_ber_length(pb, length);
 520
 521     // write uid
 522     mxf_write_local_tag(pb, 16, 0x3C0A);
 523     mxf_write_uuid(pb, Identification, 0);
 524     PRINT_KEY(s, "identification uid", pb->buf_ptr - 16);
 525
 526     // write generation uid
 527     mxf_write_local_tag(pb, 16, 0x3C09);
 528     mxf_write_uuid(pb, Identification, 1);
 529
 530     mxf_write_local_tag_utf16(pb, 0x3C01, company); // Company Name
 531     mxf_write_local_tag_utf16(pb, 0x3C02, product); // Product Name
 532     mxf_write_local_tag_utf16(pb, 0x3C04, version); // Version String
 533
 534     // write product uid
 535     mxf_write_local_tag(pb, 16, 0x3C05);
 536     mxf_write_uuid(pb, Identification, 2);
 537
 538     // modification date
 539     mxf_write_local_tag(pb, 8, 0x3C06);
 540     avio_wb64(pb, mxf->timestamp);
 541 }
 542
 543 static void mxf_write_content_storage(AVFormatContext *s)
 544 {
 545     AVIOContext *pb = s->pb;
 546
 547     mxf_write_metadata_key(pb, 0x011800);
 548     PRINT_KEY(s, "content storage key", pb->buf_ptr - 16);
 549     klv_encode_ber_length(pb, 92);
 550
 551     // write uid
 552     mxf_write_local_tag(pb, 16, 0x3C0A);
 553     mxf_write_uuid(pb, ContentStorage, 0);
 554     PRINT_KEY(s, "content storage uid", pb->buf_ptr - 16);
 555
 556     // write package reference
 557     mxf_write_local_tag(pb, 16 * 2 + 8, 0x1901);
 558     mxf_write_refs_count(pb, 2);
 559     mxf_write_uuid(pb, MaterialPackage, 0);
 560     mxf_write_uuid(pb, SourcePackage, 0);
 561
 562     // write essence container data
 563     mxf_write_local_tag(pb, 8 + 16, 0x1902);
 564     mxf_write_refs_count(pb, 1);
 565     mxf_write_uuid(pb, EssenceContainerData, 0);
 566 }
 567
 568 static void mxf_write_track(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 569 {
 570     MXFContext *mxf = s->priv_data;
 571     AVIOContext *pb = s->pb;
 572     MXFStreamContext *sc = st->priv_data;
 573
 574     mxf_write_metadata_key(pb, 0x013b00);
 575     PRINT_KEY(s, "track key", pb->buf_ptr - 16);
 576     klv_encode_ber_length(pb, 80);
 577
 578     // write track uid
 579     mxf_write_local_tag(pb, 16, 0x3C0A);
 580     mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, st->index);
 581     PRINT_KEY(s, "track uid", pb->buf_ptr - 16);
 582
 583     // write track id
 584     mxf_write_local_tag(pb, 4, 0x4801);
 585     avio_wb32(pb, st->index+2);
 586
 587     // write track number
 588     mxf_write_local_tag(pb, 4, 0x4804);
 589     if (type == MaterialPackage)
 590         avio_wb32(pb, 0); // track number of material package is 0
 591     else
 592         avio_write(pb, sc->track_essence_element_key + 12, 4);
 593
 594     mxf_write_local_tag(pb, 8, 0x4B01);
 595     avio_wb32(pb, mxf->time_base.den);
 596     avio_wb32(pb, mxf->time_base.num);
 597
 598     // write origin
 599     mxf_write_local_tag(pb, 8, 0x4B02);
 600     avio_wb64(pb, 0);
 601
 602     // write sequence refs
 603     mxf_write_local_tag(pb, 16, 0x4803);
 604     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 605 }
 606
 607 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 };
 608
 609 static void mxf_write_common_fields(AVFormatContext *s, AVStream *st)
 610 {
 611     MXFContext *mxf = s->priv_data;
 612     AVIOContext *pb = s->pb;
 613
 614     // find data define uls
 615     mxf_write_local_tag(pb, 16, 0x0201);
 616     if (st == mxf->timecode_track)
 617         avio_write(pb, smpte_12m_timecode_track_data_ul, 16);
 618     else {
 619         const MXFCodecUL *data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);
 620         avio_write(pb, data_def_ul->uid, 16);
 621     }
 622
 623     // write duration
 624     mxf_write_local_tag(pb, 8, 0x0202);
 625     avio_wb64(pb, mxf->duration);
 626 }
 627
 628 static void mxf_write_sequence(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 629 {
 630     MXFContext *mxf = s->priv_data;
 631     AVIOContext *pb = s->pb;
 632     enum MXFMetadataSetType component;
 633
 634     mxf_write_metadata_key(pb, 0x010f00);
 635     PRINT_KEY(s, "sequence key", pb->buf_ptr - 16);
 636     klv_encode_ber_length(pb, 80);
 637
 638     mxf_write_local_tag(pb, 16, 0x3C0A);
 639     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 640
 641     PRINT_KEY(s, "sequence uid", pb->buf_ptr - 16);
 642     mxf_write_common_fields(s, st);
 643
 644     // write structural component
 645     mxf_write_local_tag(pb, 16 + 8, 0x1001);
 646     mxf_write_refs_count(pb, 1);
 647     if (st == mxf->timecode_track)
 648         component = TimecodeComponent;
 649     else
 650         component = SourceClip;
 651     if (type == SourcePackage)
 652         component += TypeBottom;
 653     mxf_write_uuid(pb, component, st->index);
 654 }
 655
 656 static void mxf_write_timecode_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 657 {
 658     MXFContext *mxf = s->priv_data;
 659     AVIOContext *pb = s->pb;
 660
 661     mxf_write_metadata_key(pb, 0x011400);
 662     klv_encode_ber_length(pb, 75);
 663
 664     // UID
 665     mxf_write_local_tag(pb, 16, 0x3C0A);
 666     mxf_write_uuid(pb, type == MaterialPackage ? TimecodeComponent :
 667                    TimecodeComponent + TypeBottom, st->index);
 668
 669     mxf_write_common_fields(s, st);
 670
 671     // Start Time Code
 672     mxf_write_local_tag(pb, 8, 0x1501);
 673     avio_wb64(pb, mxf->tc.start);
 674
 675     // Rounded Time Code Base
 676     mxf_write_local_tag(pb, 2, 0x1502);
 677     avio_wb16(pb, mxf->timecode_base);
 678
 679     // Drop Frame
 680     mxf_write_local_tag(pb, 1, 0x1503);
 681     avio_w8(pb, !!(mxf->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
 682 }
 683
 684 static void mxf_write_structural_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 685 {
 686     AVIOContext *pb = s->pb;
 687     int i;
 688
 689     mxf_write_metadata_key(pb, 0x011100);
 690     PRINT_KEY(s, "sturctural component key", pb->buf_ptr - 16);
 691     klv_encode_ber_length(pb, 108);
 692
 693     // write uid
 694     mxf_write_local_tag(pb, 16, 0x3C0A);
 695     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
 696
 697     PRINT_KEY(s, "structural component uid", pb->buf_ptr - 16);
 698     mxf_write_common_fields(s, st);
 699
 700     // write start_position
 701     mxf_write_local_tag(pb, 8, 0x1201);
 702     avio_wb64(pb, 0);
 703
 704     // write source package uid, end of the reference
 705     mxf_write_local_tag(pb, 32, 0x1101);
 706     if (type == SourcePackage) {
 707         for (i = 0; i < 4; i++)
 708             avio_wb64(pb, 0);
 709     } else
 710         mxf_write_umid(s, 1);
 711
 712     // write source track id
 713     mxf_write_local_tag(pb, 4, 0x1102);
 714     if (type == SourcePackage)
 715         avio_wb32(pb, 0);
 716     else
 717         avio_wb32(pb, st->index+2);
 718 }
 719
 720 static void mxf_write_multi_descriptor(AVFormatContext *s)
 721 {
 722     MXFContext *mxf = s->priv_data;
 723     AVIOContext *pb = s->pb;
 724     const uint8_t *ul;
 725     int i;
 726
 727     mxf_write_metadata_key(pb, 0x014400);
 728     PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);
 729     klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);
 730
 731     mxf_write_local_tag(pb, 16, 0x3C0A);
 732     mxf_write_uuid(pb, MultipleDescriptor, 0);
 733     PRINT_KEY(s, "multi_desc uid", pb->buf_ptr - 16);
 734
 735     // write sample rate
 736     mxf_write_local_tag(pb, 8, 0x3001);
 737     avio_wb32(pb, mxf->time_base.den);
 738     avio_wb32(pb, mxf->time_base.num);
 739
 740     // write essence container ul
 741     mxf_write_local_tag(pb, 16, 0x3004);
 742     if (mxf->essence_container_count > 1)
 743         ul = multiple_desc_ul;
 744     else {
 745         MXFStreamContext *sc = s->streams[0]->priv_data;
 746         ul = mxf_essence_container_uls[sc->index].container_ul;
 747     }
 748     avio_write(pb, ul, 16);
 749
 750     // write sub descriptor refs
 751     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x3F01);
 752     mxf_write_refs_count(pb, s->nb_streams);
 753     for (i = 0; i < s->nb_streams; i++)
 754         mxf_write_uuid(pb, SubDescriptor, i);
 755 }
 756
 757 static void mxf_write_generic_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 758 {
 759     MXFContext *mxf = s->priv_data;
 760     MXFStreamContext *sc = st->priv_data;
 761     AVIOContext *pb = s->pb;
 762
 763     avio_write(pb, key, 16);
 764     klv_encode_ber4_length(pb, size+20+8+12+20);
 765
 766     mxf_write_local_tag(pb, 16, 0x3C0A);
 767     mxf_write_uuid(pb, SubDescriptor, st->index);
 768
 769     mxf_write_local_tag(pb, 4, 0x3006);
 770     avio_wb32(pb, st->index+2);
 771
 772     mxf_write_local_tag(pb, 8, 0x3001);
 773     avio_wb32(pb, mxf->time_base.den);
 774     avio_wb32(pb, mxf->time_base.num);
 775
 776     mxf_write_local_tag(pb, 16, 0x3004);
 777     avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
 778 }
 779
 780 static const UID mxf_mpegvideo_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 };
 781 static const UID mxf_wav_descriptor_key       = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 };
 782 static const UID mxf_aes3_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 };
 783 static const UID mxf_cdci_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x28,0x00 };
 784 static const UID mxf_generic_sound_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x42,0x00 };
 785
 786 static void mxf_write_cdci_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 787 {
 788     MXFStreamContext *sc = st->priv_data;
 789     AVIOContext *pb = s->pb;
 790     int stored_height = (st->codec->height+15)/16*16;
 791     int display_height;
 792     int f1, f2;
 793
 794     mxf_write_generic_desc(s, st, key, size+8+8+8+8+8+8+5+16+sc->interlaced*4+12+20);
 795
 796     mxf_write_local_tag(pb, 4, 0x3203);
 797     avio_wb32(pb, st->codec->width);
 798
 799     mxf_write_local_tag(pb, 4, 0x3202);
 800     avio_wb32(pb, stored_height>>sc->interlaced);
 801
 802     mxf_write_local_tag(pb, 4, 0x3209);
 803     avio_wb32(pb, st->codec->width);
 804
 805     if (st->codec->height == 608) // PAL + VBI
 806         display_height = 576;
 807     else if (st->codec->height == 512)  // NTSC + VBI
 808         display_height = 486;
 809     else
 810         display_height = st->codec->height;
 811
 812     mxf_write_local_tag(pb, 4, 0x3208);
 813     avio_wb32(pb, display_height>>sc->interlaced);
 814
 815     // component depth
 816     mxf_write_local_tag(pb, 4, 0x3301);
 817     avio_wb32(pb, 8);
 818
 819     // horizontal subsampling
 820     mxf_write_local_tag(pb, 4, 0x3302);
 821     avio_wb32(pb, 2);
 822
 823     // frame layout
 824     mxf_write_local_tag(pb, 1, 0x320C);
 825     avio_w8(pb, sc->interlaced);
 826
 827     // video line map
 828     switch (st->codec->height) {
 829     case  576: f1 = 23; f2 = 336; break;
 830     case  608: f1 =  7; f2 = 320; break;
 831     case  480: f1 = 20; f2 = 283; break;
 832     case  512: f1 =  7; f2 = 270; break;
 833     case  720: f1 = 26; f2 =   0; break; // progressive
 834     case 1080: f1 = 21; f2 = 584; break;
 835     default:   f1 =  0; f2 =   0; break;
 836     }
 837
 838     if (!sc->interlaced) {
 839         f2  = 0;
 840         f1 *= 2;
 841     }
 842
 843     mxf_write_local_tag(pb, 12+sc->interlaced*4, 0x320D);
 844     avio_wb32(pb, sc->interlaced ? 2 : 1);
 845     avio_wb32(pb, 4);
 846     avio_wb32(pb, f1);
 847     if (sc->interlaced)
 848         avio_wb32(pb, f2);
 849
 850     mxf_write_local_tag(pb, 8, 0x320E);
 851     avio_wb32(pb, sc->aspect_ratio.num);
 852     avio_wb32(pb, sc->aspect_ratio.den);
 853
 854     mxf_write_local_tag(pb, 16, 0x3201);
 855     avio_write(pb, *sc->codec_ul, 16);
 856 }
 857
 858 static void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st)
 859 {
 860     mxf_write_cdci_common(s, st, mxf_cdci_descriptor_key, 0);
 861 }
 862
 863 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
 864 {
 865     AVIOContext *pb = s->pb;
 866     int profile_and_level = (st->codec->profile<<4) | st->codec->level;
 867
 868     mxf_write_cdci_common(s, st, mxf_mpegvideo_descriptor_key, 8+5);
 869
 870     // bit rate
 871     mxf_write_local_tag(pb, 4, 0x8000);
 872     avio_wb32(pb, st->codec->bit_rate);
 873
 874     // profile and level
 875     mxf_write_local_tag(pb, 1, 0x8007);
 876     if (!st->codec->profile)
 877         profile_and_level |= 0x80; // escape bit
 878     avio_w8(pb, profile_and_level);
 879 }
 880
 881 static void mxf_write_generic_sound_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 882 {
 883     AVIOContext *pb = s->pb;
 884
 885     mxf_write_generic_desc(s, st, key, size+5+12+8+8);
 886
 887     // audio locked
 888     mxf_write_local_tag(pb, 1, 0x3D02);
 889     avio_w8(pb, 1);
 890
 891     // write audio sampling rate
 892     mxf_write_local_tag(pb, 8, 0x3D03);
 893     avio_wb32(pb, st->codec->sample_rate);
 894     avio_wb32(pb, 1);
 895
 896     mxf_write_local_tag(pb, 4, 0x3D07);
 897     avio_wb32(pb, st->codec->channels);
 898
 899     mxf_write_local_tag(pb, 4, 0x3D01);
 900     avio_wb32(pb, av_get_bits_per_sample(st->codec->codec_id));
 901 }
 902
 903 static void mxf_write_wav_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 904 {
 905     AVIOContext *pb = s->pb;
 906
 907     mxf_write_generic_sound_common(s, st, key, size+6+8);
 908
 909     mxf_write_local_tag(pb, 2, 0x3D0A);
 910     avio_wb16(pb, st->codec->block_align);
 911
 912     // avg bytes per sec
 913     mxf_write_local_tag(pb, 4, 0x3D09);
 914     avio_wb32(pb, st->codec->block_align*st->codec->sample_rate);
 915 }
 916
 917 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)
 918 {
 919     mxf_write_wav_common(s, st, mxf_wav_descriptor_key, 0);
 920 }
 921
 922 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)
 923 {
 924     mxf_write_wav_common(s, st, mxf_aes3_descriptor_key, 0);
 925 }
 926
 927 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st)
 928 {
 929     mxf_write_generic_sound_common(s, st, mxf_generic_sound_descriptor_key, 0);
 930 }
 931
 932 static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)
 933 {
 934     MXFContext *mxf = s->priv_data;
 935     AVIOContext *pb = s->pb;
 936     int i, track_count = s->nb_streams+1;
 937
 938     if (type == MaterialPackage) {
 939         mxf_write_metadata_key(pb, 0x013600);
 940         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);
 941         klv_encode_ber_length(pb, 92 + 16*track_count);
 942     } else {
 943         mxf_write_metadata_key(pb, 0x013700);
 944         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);
 945         klv_encode_ber_length(pb, 112 + 16*track_count); // 20 bytes length for descriptor reference
 946     }
 947
 948     // write uid
 949     mxf_write_local_tag(pb, 16, 0x3C0A);
 950     mxf_write_uuid(pb, type, 0);
 951     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);
 952     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);
 953
 954     // write package umid
 955     mxf_write_local_tag(pb, 32, 0x4401);
 956     mxf_write_umid(s, type == SourcePackage);
 957     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);
 958
 959     // package creation date
 960     mxf_write_local_tag(pb, 8, 0x4405);
 961     avio_wb64(pb, mxf->timestamp);
 962
 963     // package modified date
 964     mxf_write_local_tag(pb, 8, 0x4404);
 965     avio_wb64(pb, mxf->timestamp);
 966
 967     // write track refs
 968     mxf_write_local_tag(pb, track_count*16 + 8, 0x4403);
 969     mxf_write_refs_count(pb, track_count);
 970     mxf_write_uuid(pb, type == MaterialPackage ? Track :
 971                    Track + TypeBottom, -1); // timecode track
 972     for (i = 0; i < s->nb_streams; i++)
 973         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);
 974
 975     // write multiple descriptor reference
 976     if (type == SourcePackage) {
 977         mxf_write_local_tag(pb, 16, 0x4701);
 978         if (s->nb_streams > 1) {
 979             mxf_write_uuid(pb, MultipleDescriptor, 0);
 980             mxf_write_multi_descriptor(s);
 981         } else
 982             mxf_write_uuid(pb, SubDescriptor, 0);
 983     }
 984
 985     // write timecode track
 986     mxf_write_track(s, mxf->timecode_track, type);
 987     mxf_write_sequence(s, mxf->timecode_track, type);
 988     mxf_write_timecode_component(s, mxf->timecode_track, type);
 989
 990     for (i = 0; i < s->nb_streams; i++) {
 991         AVStream *st = s->streams[i];
 992         mxf_write_track(s, st, type);
 993         mxf_write_sequence(s, st, type);
 994         mxf_write_structural_component(s, st, type);
 995
 996         if (type == SourcePackage) {
 997             MXFStreamContext *sc = st->priv_data;
 998             mxf_essence_container_uls[sc->index].write_desc(s, st);
 999         }
1000     }
1001 }
1002
1003 static int mxf_write_essence_container_data(AVFormatContext *s)
1004 {
1005     AVIOContext *pb = s->pb;
1006
1007     mxf_write_metadata_key(pb, 0x012300);
1008     klv_encode_ber_length(pb, 72);
1009
1010     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID
1011     mxf_write_uuid(pb, EssenceContainerData, 0);
1012
1013     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID
1014     mxf_write_umid(s, 1);
1015
1016     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID
1017     avio_wb32(pb, 1);
1018
1019     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID
1020     avio_wb32(pb, 2);
1021
1022     return 0;
1023 }
1024
1025 static int mxf_write_header_metadata_sets(AVFormatContext *s)
1026 {
1027     mxf_write_preface(s);
1028     mxf_write_identification(s);
1029     mxf_write_content_storage(s);
1030     mxf_write_package(s, MaterialPackage);
1031     mxf_write_package(s, SourcePackage);
1032     mxf_write_essence_container_data(s);
1033     return 0;
1034 }
1035
1036 static unsigned klv_fill_size(uint64_t size)
1037 {
1038     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));
1039     if (pad < 20) // smallest fill item possible
1040         return pad + KAG_SIZE;
1041     else
1042         return pad & (KAG_SIZE-1);
1043 }
1044
1045 static void mxf_write_index_table_segment(AVFormatContext *s)
1046 {
1047     MXFContext *mxf = s->priv_data;
1048     AVIOContext *pb = s->pb;
1049     int i, j, temporal_reordering = 0;
1050     int key_index = mxf->last_key_index;
1051
1052     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);
1053
1054     if (!mxf->edit_units_count && !mxf->edit_unit_byte_count)
1055         return;
1056
1057     avio_write(pb, index_table_segment_key, 16);
1058
1059     if (mxf->edit_unit_byte_count) {
1060         klv_encode_ber_length(pb, 80);
1061     } else {
1062         klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1)*6 +
1063                               12+mxf->edit_units_count*(11+mxf->slice_count*4));
1064     }
1065
1066     // instance id
1067     mxf_write_local_tag(pb, 16, 0x3C0A);
1068     mxf_write_uuid(pb, IndexTableSegment, 0);
1069
1070     // index edit rate
1071     mxf_write_local_tag(pb, 8, 0x3F0B);
1072     avio_wb32(pb, mxf->time_base.den);
1073     avio_wb32(pb, mxf->time_base.num);
1074
1075     // index start position
1076     mxf_write_local_tag(pb, 8, 0x3F0C);
1077     avio_wb64(pb, mxf->last_indexed_edit_unit);
1078
1079     // index duration
1080     mxf_write_local_tag(pb, 8, 0x3F0D);
1081     if (mxf->edit_unit_byte_count)
1082         avio_wb64(pb, 0); // index table covers whole container
1083     else
1084         avio_wb64(pb, mxf->edit_units_count);
1085
1086     // edit unit byte count
1087     mxf_write_local_tag(pb, 4, 0x3F05);
1088     avio_wb32(pb, mxf->edit_unit_byte_count);
1089
1090     // index sid
1091     mxf_write_local_tag(pb, 4, 0x3F06);
1092     avio_wb32(pb, 2);
1093
1094     // body sid
1095     mxf_write_local_tag(pb, 4, 0x3F07);
1096     avio_wb32(pb, 1);
1097
1098     if (!mxf->edit_unit_byte_count) {
1099         // real slice count - 1
1100         mxf_write_local_tag(pb, 1, 0x3F08);
1101         avio_w8(pb, mxf->slice_count);
1102
1103         // delta entry array
1104         mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);
1105         avio_wb32(pb, s->nb_streams+1); // num of entries
1106         avio_wb32(pb, 6);               // size of one entry
1107         // write system item delta entry
1108         avio_w8(pb, 0);
1109         avio_w8(pb, 0); // slice entry
1110         avio_wb32(pb, 0); // element delta
1111         for (i = 0; i < s->nb_streams; i++) {
1112             AVStream *st = s->streams[i];
1113             MXFStreamContext *sc = st->priv_data;
1114             avio_w8(pb, sc->temporal_reordering);
1115             if (sc->temporal_reordering)
1116                 temporal_reordering = 1;
1117             if (i == 0) { // video track
1118                 avio_w8(pb, 0); // slice number
1119                 avio_wb32(pb, KAG_SIZE); // system item size including klv fill
1120             } else { // audio track
1121                 unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;
1122                 audio_frame_size += klv_fill_size(audio_frame_size);
1123                 avio_w8(pb, 1);
1124                 avio_wb32(pb, (i-1)*audio_frame_size); // element delta
1125             }
1126         }
1127
1128         mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);
1129         avio_wb32(pb, mxf->edit_units_count);  // num of entries
1130         avio_wb32(pb, 11+mxf->slice_count*4);  // size of one entry
1131
1132         for (i = 0; i < mxf->edit_units_count; i++) {
1133             int temporal_offset = 0;
1134
1135             if (!(mxf->index_entries[i].flags & 0x33)) { // I frame
1136                 mxf->last_key_index = key_index;
1137                 key_index = i;
1138             }
1139
1140             if (temporal_reordering) {
1141                 int pic_num_in_gop = i - key_index;
1142                 if (pic_num_in_gop != mxf->index_entries[i].temporal_ref) {
1143                     for (j = key_index; j < mxf->edit_units_count; j++) {
1144                         if (pic_num_in_gop == mxf->index_entries[j].temporal_ref)
1145                             break;
1146                     }
1147                     if (j == mxf->edit_units_count)
1148                         av_log(s, AV_LOG_WARNING, "missing frames\n");
1149                     temporal_offset = j - key_index - pic_num_in_gop;
1150                 }
1151             }
1152             avio_w8(pb, temporal_offset);
1153
1154             if ((mxf->index_entries[i].flags & 0x30) == 0x30) { // back and forward prediction
1155                 avio_w8(pb, mxf->last_key_index - i);
1156             } else {
1157                 avio_w8(pb, key_index - i); // key frame offset
1158                 if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward
1159                     mxf->last_key_index = key_index;
1160             }
1161
1162             if (!(mxf->index_entries[i].flags & 0x33) && // I frame
1163                 mxf->index_entries[i].flags & 0x40 && !temporal_offset)
1164                 mxf->index_entries[i].flags |= 0x80; // random access
1165             avio_w8(pb, mxf->index_entries[i].flags);
1166             // stream offset
1167             avio_wb64(pb, mxf->index_entries[i].offset);
1168             if (s->nb_streams > 1)
1169                 avio_wb32(pb, mxf->index_entries[i].slice_offset);
1170         }
1171
1172         mxf->last_key_index = key_index - mxf->edit_units_count;
1173         mxf->last_indexed_edit_unit += mxf->edit_units_count;
1174         mxf->edit_units_count = 0;
1175     }
1176 }
1177
1178 static void mxf_write_klv_fill(AVFormatContext *s)
1179 {
1180     unsigned pad = klv_fill_size(avio_tell(s->pb));
1181     if (pad) {
1182         avio_write(s->pb, klv_fill_key, 16);
1183         pad -= 16 + 4;
1184         klv_encode_ber4_length(s->pb, pad);
1185         for (; pad; pad--)
1186             avio_w8(s->pb, 0);
1187         assert(!(avio_tell(s->pb) & (KAG_SIZE-1)));
1188     }
1189 }
1190
1191 static void mxf_write_partition(AVFormatContext *s, int bodysid,
1192                                 int indexsid,
1193                                 const uint8_t *key, int write_metadata)
1194 {
1195     MXFContext *mxf = s->priv_data;
1196     AVIOContext *pb = s->pb;
1197     int64_t header_byte_count_offset;
1198     unsigned index_byte_count = 0;
1199     uint64_t partition_offset = avio_tell(pb);
1200
1201     if (!mxf->edit_unit_byte_count && mxf->edit_units_count)
1202         index_byte_count = 85 + 12+(s->nb_streams+1)*6 +
1203             12+mxf->edit_units_count*(11+mxf->slice_count*4);
1204     else if (mxf->edit_unit_byte_count && indexsid)
1205         index_byte_count = 80;
1206
1207     if (index_byte_count) {
1208         // add encoded ber length
1209         index_byte_count += 16 + klv_ber_length(index_byte_count);
1210         index_byte_count += klv_fill_size(index_byte_count);
1211     }
1212
1213     if (!memcmp(key, body_partition_key, 16)) {
1214         mxf->body_partition_offset =
1215             av_realloc(mxf->body_partition_offset,
1216                        (mxf->body_partitions_count+1)*
1217                        sizeof(*mxf->body_partition_offset));
1218         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;
1219     }
1220
1221     // write klv
1222     avio_write(pb, key, 16);
1223     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);
1224
1225     // write partition value
1226     avio_wb16(pb, 1); // majorVersion
1227     avio_wb16(pb, 2); // minorVersion
1228     avio_wb32(pb, KAG_SIZE); // KAGSize
1229
1230     avio_wb64(pb, partition_offset); // ThisPartition
1231
1232     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)
1233         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition
1234     else if (!memcmp(key, footer_partition_key, 16) && mxf->body_partitions_count)
1235         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition
1236     else
1237         avio_wb64(pb, 0);
1238
1239     avio_wb64(pb, mxf->footer_partition_offset); // footerPartition
1240
1241     // set offset
1242     header_byte_count_offset = avio_tell(pb);
1243     avio_wb64(pb, 0); // headerByteCount, update later
1244
1245     // indexTable
1246     avio_wb64(pb, index_byte_count); // indexByteCount
1247     avio_wb32(pb, index_byte_count ? indexsid : 0); // indexSID
1248
1249     // BodyOffset
1250     if (bodysid && mxf->edit_units_count && mxf->body_partitions_count) {
1251         avio_wb64(pb, mxf->body_offset);
1252     } else
1253         avio_wb64(pb, 0);
1254
1255     avio_wb32(pb, bodysid); // bodySID
1256
1257     // operational pattern
1258     avio_write(pb, op1a_ul, 16);
1259
1260     // essence container
1261     mxf_write_essence_container_refs(s);
1262
1263     if (write_metadata) {
1264         // mark the start of the headermetadata and calculate metadata size
1265         int64_t pos, start;
1266         unsigned header_byte_count;
1267
1268         mxf_write_klv_fill(s);
1269         start = avio_tell(s->pb);
1270         mxf_write_primer_pack(s);
1271         mxf_write_header_metadata_sets(s);
1272         pos = avio_tell(s->pb);
1273         header_byte_count = pos - start + klv_fill_size(pos);
1274
1275         // update header_byte_count
1276         avio_seek(pb, header_byte_count_offset, SEEK_SET);
1277         avio_wb64(pb, header_byte_count);
1278         avio_seek(pb, pos, SEEK_SET);
1279     }
1280
1281     avio_flush(pb);
1282 }
1283
1284 static const UID mxf_mpeg2_codec_uls[] = {
1285     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame
1286     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP
1287     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame
1288     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP
1289     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame
1290     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP
1291     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame
1292     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP
1293     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x05,0x02,0x00 }, // MP@H-14 I-Frame
1294     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x05,0x03,0x00 }, // MP@H-14 Long GOP
1295 };
1296
1297 static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)
1298 {
1299     int long_gop = avctx->gop_size > 1 || avctx->has_b_frames;
1300
1301     if (avctx->profile == 4) { // Main
1302         if (avctx->level == 8) // Main
1303             return &mxf_mpeg2_codec_uls[0+long_gop];
1304         else if (avctx->level == 4) // High
1305             return &mxf_mpeg2_codec_uls[4+long_gop];
1306         else if (avctx->level == 6) // High 14
1307             return &mxf_mpeg2_codec_uls[8+long_gop];
1308     } else if (avctx->profile == 0) { // 422
1309         if (avctx->level == 5) // Main
1310             return &mxf_mpeg2_codec_uls[2+long_gop];
1311         else if (avctx->level == 2) // High
1312             return &mxf_mpeg2_codec_uls[6+long_gop];
1313     }
1314     return NULL;
1315 }
1316
1317 static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st,
1318                                  AVPacket *pkt, MXFIndexEntry *e)
1319 {
1320     MXFStreamContext *sc = st->priv_data;
1321     uint32_t c = -1;
1322     int i;
1323
1324     for(i = 0; i < pkt->size - 4; i++) {
1325         c = (c<<8) + pkt->data[i];
1326         if (c == 0x1b5) {
1327             if ((pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
1328                 st->codec->profile = pkt->data[i+1] & 0x07;
1329                 st->codec->level   = pkt->data[i+2] >> 4;
1330             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext
1331                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame
1332                 break;
1333             }
1334         } else if (c == 0x1b8) { // gop
1335             if (pkt->data[i+4]>>6 & 0x01) { // closed
1336                 sc->closed_gop = 1;
1337                 if (e->flags & 0x40) // sequence header present
1338                     e->flags |= 0x80; // random access
1339             }
1340         } else if (c == 0x1b3) { // seq
1341             e->flags |= 0x40;
1342             switch ((pkt->data[i+4]>>4) & 0xf) {
1343             case 2:  sc->aspect_ratio = (AVRational){  4,  3}; break;
1344             case 3:  sc->aspect_ratio = (AVRational){ 16,  9}; break;
1345             case 4:  sc->aspect_ratio = (AVRational){221,100}; break;
1346             default:
1347                 av_reduce(&sc->aspect_ratio.num, &sc->aspect_ratio.den,
1348                           st->codec->width, st->codec->height, 1024*1024);
1349             }
1350         } else if (c == 0x100) { // pic
1351             int pict_type = (pkt->data[i+2]>>3) & 0x07;
1352             e->temporal_ref = (pkt->data[i+1]<<2) | (pkt->data[i+2]>>6);
1353             if (pict_type == 2) { // P frame
1354                 e->flags |= 0x22;
1355                 sc->closed_gop = 0; // reset closed gop, don't matter anymore
1356             } else if (pict_type == 3) { // B frame
1357                 if (sc->closed_gop)
1358                     e->flags |= 0x13; // only backward prediction
1359                 else
1360                     e->flags |= 0x33;
1361                 sc->temporal_reordering = -1;
1362             } else if (!pict_type) {
1363                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");
1364                 return 0;
1365             }
1366         }
1367     }
1368     if (s->oformat != &ff_mxf_d10_muxer)
1369         sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);
1370     return !!sc->codec_ul;
1371 }
1372
1373 static uint64_t mxf_parse_timestamp(time_t timestamp)
1374 {
1375     struct tm *time = gmtime(&timestamp);
1376     if (!time)
1377         return 0;
1378     return (uint64_t)(time->tm_year+1900) << 48 |
1379            (uint64_t)(time->tm_mon+1)     << 40 |
1380            (uint64_t) time->tm_mday       << 32 |
1381                       time->tm_hour       << 24 |
1382                       time->tm_min        << 16 |
1383                       time->tm_sec        << 8;
1384 }
1385
1386 static void mxf_gen_umid(AVFormatContext *s)
1387 {
1388     MXFContext *mxf = s->priv_data;
1389     uint32_t seed = av_get_random_seed();
1390     uint64_t umid = seed + 0x5294713400000000LL;
1391
1392     AV_WB64(mxf->umid  , umid);
1393     AV_WB64(mxf->umid+8, umid>>8);
1394
1395     mxf->instance_number = seed;
1396 }
1397
1398 static int mxf_write_header(AVFormatContext *s)
1399 {
1400     MXFContext *mxf = s->priv_data;
1401     int i, ret;
1402     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};
1403     const int *samples_per_frame = NULL;
1404     AVDictionaryEntry *t;
1405     int64_t timestamp = 0;
1406
1407     if (!s->nb_streams)
1408         return -1;
1409
1410     for (i = 0; i < s->nb_streams; i++) {
1411         AVStream *st = s->streams[i];
1412         MXFStreamContext *sc = av_mallocz(sizeof(*sc));
1413         if (!sc)
1414             return AVERROR(ENOMEM);
1415         st->priv_data = sc;
1416
1417         if ((i == 0) ^ (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)) {
1418             av_log(s, AV_LOG_ERROR, "there must be exactly one video stream and it must be the first one\n");
1419             return -1;
1420         }
1421
1422         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1423             AVRational rate;
1424             if (fabs(av_q2d(st->codec->time_base) - 1/25.0) < 0.0001) {
1425                 samples_per_frame = PAL_samples_per_frame;
1426                 mxf->time_base = (AVRational){ 1, 25 };
1427                 mxf->timecode_base = 25;
1428             } else if (fabs(av_q2d(st->codec->time_base) - 1/50.0) < 0.0001) {
1429                 samples_per_frame = PAL_50_samples_per_frame;
1430                 mxf->time_base = (AVRational){ 1, 50 };
1431                 mxf->timecode_base = 50;
1432             } else if (fabs(av_q2d(st->codec->time_base) - 1001/30000.0) < 0.0001) {
1433                 samples_per_frame = NTSC_samples_per_frame;
1434                 mxf->time_base = (AVRational){ 1001, 30000 };
1435                 mxf->timecode_base = 30;
1436             } else if (fabs(av_q2d(st->codec->time_base) - 1001/60000.0) < 0.0001) {
1437                 samples_per_frame = NTSC_60_samples_per_frame;
1438                 mxf->time_base = (AVRational){ 1001, 60000 };
1439                 mxf->timecode_base = 60;
1440             } else {
1441                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");
1442                 return -1;
1443             }
1444             rate = (AVRational){mxf->time_base.den, mxf->time_base.num};
1445             avpriv_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);
1446             if (mxf->tc_opt_str)
1447                 ret = av_timecode_init_from_string(&mxf->tc, rate,
1448                                                    mxf->tc_opt_str, s);
1449             else
1450                 ret = av_timecode_init(&mxf->tc, rate, 0, 0, s);
1451             if (ret < 0)
1452                 return ret;
1453             if (s->oformat == &ff_mxf_d10_muxer) {
1454                 if (st->codec->bit_rate == 50000000)
1455                     if (mxf->time_base.den == 25) sc->index = 3;
1456                     else                          sc->index = 5;
1457                 else if (st->codec->bit_rate == 40000000)
1458                     if (mxf->time_base.den == 25) sc->index = 7;
1459                     else                          sc->index = 9;
1460                 else if (st->codec->bit_rate == 30000000)
1461                     if (mxf->time_base.den == 25) sc->index = 11;
1462                     else                          sc->index = 13;
1463                 else {
1464                     av_log(s, AV_LOG_ERROR, "error MXF D-10 only support 30/40/50 mbit/s\n");
1465                     return -1;
1466                 }
1467
1468                 mxf->edit_unit_byte_count = KAG_SIZE; // system element
1469                 mxf->edit_unit_byte_count += 16 + 4 + (uint64_t)st->codec->bit_rate *
1470                     mxf->time_base.num / (8*mxf->time_base.den);
1471                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);
1472                 mxf->edit_unit_byte_count += 16 + 4 + 4 + samples_per_frame[0]*8*4;
1473                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);
1474             }
1475         } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1476             if (st->codec->sample_rate != 48000) {
1477                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");
1478                 return -1;
1479             }
1480             avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
1481             if (s->oformat == &ff_mxf_d10_muxer) {
1482                 if (st->index != 1) {
1483                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support one audio track\n");
1484                     return -1;
1485                 }
1486                 if (st->codec->codec_id != CODEC_ID_PCM_S16LE &&
1487                     st->codec->codec_id != CODEC_ID_PCM_S24LE) {
1488                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support 16 or 24 bits le audio\n");
1489                 }
1490                 sc->index = ((MXFStreamContext*)s->streams[0]->priv_data)->index + 1;
1491             } else
1492             mxf->slice_count = 1;
1493         }
1494
1495         if (!sc->index) {
1496             sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);
1497             if (sc->index == -1) {
1498                 av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "
1499                        "codec not currently supported in container\n", i);
1500                 return -1;
1501             }
1502         }
1503
1504         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;
1505
1506         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);
1507         sc->track_essence_element_key[15] = present[sc->index];
1508         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);
1509
1510         if (!present[sc->index])
1511             mxf->essence_container_count++;
1512         present[sc->index]++;
1513     }
1514
1515     if (s->oformat == &ff_mxf_d10_muxer) {
1516         mxf->essence_container_count = 1;
1517     }
1518
1519     if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))
1520         mxf_gen_umid(s);
1521
1522     for (i = 0; i < s->nb_streams; i++) {
1523         MXFStreamContext *sc = s->streams[i]->priv_data;
1524         // update element count
1525         sc->track_essence_element_key[13] = present[sc->index];
1526         sc->order = AV_RB32(sc->track_essence_element_key+12);
1527     }
1528
1529     if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))
1530         timestamp = ff_iso8601_to_unix_time(t->value);
1531     if (timestamp)
1532         mxf->timestamp = mxf_parse_timestamp(timestamp);
1533     mxf->duration = -1;
1534
1535     mxf->timecode_track = av_mallocz(sizeof(*mxf->timecode_track));
1536     if (!mxf->timecode_track)
1537         return AVERROR(ENOMEM);
1538     mxf->timecode_track->priv_data = av_mallocz(sizeof(MXFStreamContext));
1539     if (!mxf->timecode_track->priv_data)
1540         return AVERROR(ENOMEM);
1541     mxf->timecode_track->index = -1;
1542
1543     if (!samples_per_frame)
1544         samples_per_frame = PAL_samples_per_frame;
1545
1546     if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)
1547         return -1;
1548
1549     return 0;
1550 }
1551
1552 static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };
1553 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 };
1554
1555 static void mxf_write_system_item(AVFormatContext *s)
1556 {
1557     MXFContext *mxf = s->priv_data;
1558     AVIOContext *pb = s->pb;
1559     unsigned frame;
1560     uint32_t time_code;
1561
1562     frame = mxf->last_indexed_edit_unit + mxf->edit_units_count;
1563
1564     // write system metadata pack
1565     avio_write(pb, system_metadata_pack_key, 16);
1566     klv_encode_ber4_length(pb, 57);
1567     avio_w8(pb, 0x5c); // UL, user date/time stamp, picture and sound item present
1568     avio_w8(pb, 0x04); // content package rate
1569     avio_w8(pb, 0x00); // content package type
1570     avio_wb16(pb, 0x00); // channel handle
1571     avio_wb16(pb, mxf->tc.start + frame); // continuity count
1572     if (mxf->essence_container_count > 1)
1573         avio_write(pb, multiple_desc_ul, 16);
1574     else {
1575         MXFStreamContext *sc = s->streams[0]->priv_data;
1576         avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
1577     }
1578     avio_w8(pb, 0);
1579     avio_wb64(pb, 0);
1580     avio_wb64(pb, 0); // creation date/time stamp
1581
1582     avio_w8(pb, 0x81); // SMPTE 12M time code
1583     time_code = av_timecode_get_smpte_from_framenum(&mxf->tc, frame);
1584     avio_wb32(pb, time_code);
1585     avio_wb32(pb, 0); // binary group data
1586     avio_wb64(pb, 0);
1587
1588     // write system metadata package set
1589     avio_write(pb, system_metadata_package_set_key, 16);
1590     klv_encode_ber4_length(pb, 35);
1591     avio_w8(pb, 0x83); // UMID
1592     avio_wb16(pb, 0x20);
1593     mxf_write_umid(s, 1);
1594 }
1595
1596 static void mxf_write_d10_video_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
1597 {
1598     MXFContext *mxf = s->priv_data;
1599     AVIOContext *pb = s->pb;
1600     int packet_size = (uint64_t)st->codec->bit_rate*mxf->time_base.num /
1601         (8*mxf->time_base.den); // frame size
1602     int pad;
1603
1604     packet_size += 16 + 4;
1605     packet_size += klv_fill_size(packet_size);
1606
1607     klv_encode_ber4_length(pb, pkt->size);
1608     avio_write(pb, pkt->data, pkt->size);
1609
1610     // ensure CBR muxing by padding to correct video frame size
1611     pad = packet_size - pkt->size - 16 - 4;
1612     if (pad > 20) {
1613         avio_write(s->pb, klv_fill_key, 16);
1614         pad -= 16 + 4;
1615         klv_encode_ber4_length(s->pb, pad);
1616         for (; pad; pad--)
1617             avio_w8(s->pb, 0);
1618         assert(!(avio_tell(s->pb) & (KAG_SIZE-1)));
1619     } else {
1620         av_log(s, AV_LOG_WARNING, "cannot fill d-10 video packet\n");
1621         for (; pad > 0; pad--)
1622             avio_w8(s->pb, 0);
1623     }
1624 }
1625
1626 static void mxf_write_d10_audio_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
1627 {
1628     MXFContext *mxf = s->priv_data;
1629     AVIOContext *pb = s->pb;
1630     int frame_size = pkt->size / st->codec->block_align;
1631     uint8_t *samples = pkt->data;
1632     uint8_t *end = pkt->data + pkt->size;
1633     int i;
1634
1635     klv_encode_ber4_length(pb, 4 + frame_size*4*8);
1636
1637     avio_w8(pb, (frame_size == 1920 ? 0 : (mxf->edit_units_count-1) % 5 + 1));
1638     avio_wl16(pb, frame_size);
1639     avio_w8(pb, (1<<st->codec->channels)-1);
1640
1641     while (samples < end) {
1642         for (i = 0; i < st->codec->channels; i++) {
1643             uint32_t sample;
1644             if (st->codec->codec_id == CODEC_ID_PCM_S24LE) {
1645                 sample = AV_RL24(samples)<< 4;
1646                 samples += 3;
1647             } else {
1648                 sample = AV_RL16(samples)<<12;
1649                 samples += 2;
1650             }
1651             avio_wl32(pb, sample | i);
1652         }
1653         for (; i < 8; i++)
1654             avio_wl32(pb, i);
1655     }
1656 }
1657
1658 static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
1659 {
1660     MXFContext *mxf = s->priv_data;
1661     AVIOContext *pb = s->pb;
1662     AVStream *st = s->streams[pkt->stream_index];
1663     MXFStreamContext *sc = st->priv_data;
1664     MXFIndexEntry ie = {0};
1665
1666     if (!mxf->edit_unit_byte_count && !(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {
1667         mxf->index_entries = av_realloc(mxf->index_entries,
1668             (mxf->edit_units_count + EDIT_UNITS_PER_BODY)*sizeof(*mxf->index_entries));
1669         if (!mxf->index_entries) {
1670             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");
1671             return -1;
1672         }
1673     }
1674
1675     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
1676         if (!mxf_parse_mpeg2_frame(s, st, pkt, &ie)) {
1677             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
1678             return -1;
1679         }
1680     }
1681
1682     if (!mxf->header_written) {
1683         if (mxf->edit_unit_byte_count) {
1684             mxf_write_partition(s, 1, 2, header_open_partition_key, 1);
1685             mxf_write_klv_fill(s);
1686             mxf_write_index_table_segment(s);
1687         } else {
1688             mxf_write_partition(s, 0, 0, header_open_partition_key, 1);
1689         }
1690         mxf->header_written = 1;
1691     }
1692
1693     if (st->index == 0) {
1694         if (!mxf->edit_unit_byte_count &&
1695             (!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&
1696             !(ie.flags & 0x33)) { // I frame, Gop start
1697             mxf_write_klv_fill(s);
1698             mxf_write_partition(s, 1, 2, body_partition_key, 0);
1699
1700             mxf_write_klv_fill(s);
1701             mxf_write_index_table_segment(s);
1702         }
1703
1704         mxf_write_klv_fill(s);
1705         mxf_write_system_item(s);
1706
1707         if (!mxf->edit_unit_byte_count) {
1708             mxf->index_entries[mxf->edit_units_count].offset = mxf->body_offset;
1709             mxf->index_entries[mxf->edit_units_count].flags = ie.flags;
1710             mxf->index_entries[mxf->edit_units_count].temporal_ref = ie.temporal_ref;
1711             mxf->body_offset += KAG_SIZE; // size of system element
1712         }
1713         mxf->edit_units_count++;
1714     } else if (!mxf->edit_unit_byte_count && st->index == 1) {
1715         mxf->index_entries[mxf->edit_units_count-1].slice_offset =
1716             mxf->body_offset - mxf->index_entries[mxf->edit_units_count-1].offset;
1717     }
1718
1719     mxf_write_klv_fill(s);
1720     avio_write(pb, sc->track_essence_element_key, 16); // write key
1721     if (s->oformat == &ff_mxf_d10_muxer) {
1722         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
1723             mxf_write_d10_video_packet(s, st, pkt);
1724         else
1725             mxf_write_d10_audio_packet(s, st, pkt);
1726     } else {
1727         klv_encode_ber4_length(pb, pkt->size); // write length
1728         avio_write(pb, pkt->data, pkt->size);
1729         mxf->body_offset += 16+4+pkt->size + klv_fill_size(16+4+pkt->size);
1730     }
1731
1732     avio_flush(pb);
1733
1734     return 0;
1735 }
1736
1737 static void mxf_write_random_index_pack(AVFormatContext *s)
1738 {
1739     MXFContext *mxf = s->priv_data;
1740     AVIOContext *pb = s->pb;
1741     uint64_t pos = avio_tell(pb);
1742     int i;
1743
1744     avio_write(pb, random_index_pack_key, 16);
1745     klv_encode_ber_length(pb, 28 + 12*mxf->body_partitions_count);
1746
1747     if (mxf->edit_unit_byte_count)
1748         avio_wb32(pb, 1); // BodySID of header partition
1749     else
1750         avio_wb32(pb, 0);
1751     avio_wb64(pb, 0); // offset of header partition
1752
1753     for (i = 0; i < mxf->body_partitions_count; i++) {
1754         avio_wb32(pb, 1); // BodySID
1755         avio_wb64(pb, mxf->body_partition_offset[i]);
1756     }
1757
1758     avio_wb32(pb, 0); // BodySID of footer partition
1759     avio_wb64(pb, mxf->footer_partition_offset);
1760
1761     avio_wb32(pb, avio_tell(pb) - pos + 4);
1762 }
1763
1764 static int mxf_write_footer(AVFormatContext *s)
1765 {
1766     MXFContext *mxf = s->priv_data;
1767     AVIOContext *pb = s->pb;
1768
1769     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;
1770
1771     mxf_write_klv_fill(s);
1772     mxf->footer_partition_offset = avio_tell(pb);
1773     if (mxf->edit_unit_byte_count) { // no need to repeat index
1774         mxf_write_partition(s, 0, 0, footer_partition_key, 0);
1775     } else {
1776         mxf_write_partition(s, 0, 2, footer_partition_key, 0);
1777
1778         mxf_write_klv_fill(s);
1779         mxf_write_index_table_segment(s);
1780     }
1781
1782     mxf_write_klv_fill(s);
1783     mxf_write_random_index_pack(s);
1784
1785     if (s->pb->seekable) {
1786         avio_seek(pb, 0, SEEK_SET);
1787         if (mxf->edit_unit_byte_count) {
1788             mxf_write_partition(s, 1, 2, header_closed_partition_key, 1);
1789             mxf_write_klv_fill(s);
1790             mxf_write_index_table_segment(s);
1791         } else {
1792             mxf_write_partition(s, 0, 0, header_closed_partition_key, 1);
1793         }
1794     }
1795
1796     avio_flush(pb);
1797
1798     ff_audio_interleave_close(s);
1799
1800     av_freep(&mxf->index_entries);
1801     av_freep(&mxf->body_partition_offset);
1802     av_freep(&mxf->timecode_track->priv_data);
1803     av_freep(&mxf->timecode_track);
1804
1805     mxf_free(s);
1806
1807     return 0;
1808 }
1809
1810 static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1811 {
1812     int i, stream_count = 0;
1813
1814     for (i = 0; i < s->nb_streams; i++)
1815         stream_count += !!s->streams[i]->last_in_packet_buffer;
1816
1817     if (stream_count && (s->nb_streams == stream_count || flush)) {
1818         AVPacketList *pktl = s->packet_buffer;
1819         if (s->nb_streams != stream_count) {
1820             AVPacketList *last = NULL;
1821             // find last packet in edit unit
1822             while (pktl) {
1823                 if (!stream_count || pktl->pkt.stream_index == 0)
1824                     break;
1825                 last = pktl;
1826                 pktl = pktl->next;
1827                 stream_count--;
1828             }
1829             // purge packet queue
1830             while (pktl) {
1831                 AVPacketList *next = pktl->next;
1832
1833                 if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)
1834                     s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;
1835                 av_free_packet(&pktl->pkt);
1836                 av_freep(&pktl);
1837                 pktl = next;
1838             }
1839             if (last)
1840                 last->next = NULL;
1841             else {
1842                 s->packet_buffer = NULL;
1843                 s->packet_buffer_end= NULL;
1844                 goto out;
1845             }
1846             pktl = s->packet_buffer;
1847         }
1848
1849         *out = pktl->pkt;
1850         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);
1851         s->packet_buffer = pktl->next;
1852         if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)
1853             s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;
1854         if(!s->packet_buffer)
1855             s->packet_buffer_end= NULL;
1856         av_freep(&pktl);
1857         return 1;
1858     } else {
1859     out:
1860         av_init_packet(out);
1861         return 0;
1862     }
1863 }
1864
1865 static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
1866 {
1867     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;
1868     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;
1869
1870     return next->dts > pkt->dts ||
1871         (next->dts == pkt->dts && sc->order < sc2->order);
1872 }
1873
1874 static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1875 {
1876     return ff_audio_rechunk_interleave(s, out, pkt, flush,
1877                                mxf_interleave_get_packet, mxf_compare_timestamps);
1878 }
1879
1880 static const AVClass mxf_class = {
1881     .class_name = "mxf",
1882     .item_name  = av_default_item_name,
1883     .version    = LIBAVUTIL_VERSION_INT,
1884     .option     = (const AVOption[]){
1885         {AV_TIMECODE_OPTION(MXFContext, tc_opt_str, AV_OPT_FLAG_ENCODING_PARAM)},
1886         {NULL}
1887     },
1888 };
1889
1890 static const AVClass mxf_d10_class = {
1891     .class_name = "mxf_d10",
1892     .item_name  = av_default_item_name,
1893     .version    = LIBAVUTIL_VERSION_INT,
1894     .option     = (const AVOption[]){
1895         {AV_TIMECODE_OPTION(MXFContext, tc_opt_str, AV_OPT_FLAG_ENCODING_PARAM)},
1896         {NULL}
1897     },
1898 };
1899
1900 AVOutputFormat ff_mxf_muxer = {
1901     .name              = "mxf",
1902     .long_name         = NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1903     .mime_type         = "application/mxf",
1904     .extensions        = "mxf",
1905     .priv_data_size    = sizeof(MXFContext),
1906     .audio_codec       = CODEC_ID_PCM_S16LE,
1907     .video_codec       = CODEC_ID_MPEG2VIDEO,
1908     .write_header      = mxf_write_header,
1909     .write_packet      = mxf_write_packet,
1910     .write_trailer     = mxf_write_footer,
1911     .flags             = AVFMT_NOTIMESTAMPS,
1912     .interleave_packet = mxf_interleave,
1913     .priv_class        = &mxf_class,
1914 };
1915
1916 AVOutputFormat ff_mxf_d10_muxer = {
1917     .name              = "mxf_d10",
1918     .long_name         = NULL_IF_CONFIG_SMALL("Material eXchange Format, D-10 Mapping"),
1919     .mime_type         = "application/mxf",
1920     .priv_data_size    = sizeof(MXFContext),
1921     .audio_codec       = CODEC_ID_PCM_S16LE,
1922     .video_codec       = CODEC_ID_MPEG2VIDEO,
1923     .write_header      = mxf_write_header,
1924     .write_packet      = mxf_write_packet,
1925     .write_trailer     = mxf_write_footer,
1926     .flags             = AVFMT_NOTIMESTAMPS,
1927     .interleave_packet = mxf_interleave,
1928     .priv_class        = &mxf_d10_class,
1929 };