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