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/random_seed.h"
  39 #include "libavcodec/bytestream.h"
  40 #include "audiointerleave.h"
  41 #include "avformat.h"
  42 #include "mxf.h"
  43
  44 static const int NTSC_samples_per_frame[] = { 1602, 1601, 1602, 1601, 1602, 0 };
  45 static const int PAL_samples_per_frame[]  = { 1920, 0 };
  46
  47 AVOutputFormat mxf_d10_muxer;
  48
  49 #define EDIT_UNITS_PER_BODY 250
  50 #define KAG_SIZE 512
  51
  52 typedef struct {
  53     int local_tag;
  54     UID uid;
  55 } MXFLocalTagPair;
  56
  57 typedef struct {
  58     uint8_t flags;
  59     uint64_t offset;
  60     unsigned slice_offset; ///< offset of audio slice
  61 } MXFIndexEntry;
  62
  63 typedef struct {
  64     AudioInterleaveContext aic;
  65     UID track_essence_element_key;
  66     int index;               ///< index in mxf_essence_container_uls table
  67     const UID *codec_ul;
  68     int order;               ///< interleaving order if dts are equal
  69     int interlaced;          ///< wether picture is interlaced
  70     int temporal_reordering;
  71     AVRational aspect_ratio; ///< display aspect ratio
  72     int closed_gop;          ///< gop is closed, used in mpeg-2 frame parsing
  73 } MXFStreamContext;
  74
  75 typedef struct {
  76     UID container_ul;
  77     UID element_ul;
  78     UID codec_ul;
  79     void (*write_desc)();
  80 } MXFContainerEssenceEntry;
  81
  82 static const struct {
  83     enum CodecID id;
  84     int index;
  85 } mxf_essence_mappings[] = {
  86     { CODEC_ID_MPEG2VIDEO, 0 },
  87     { CODEC_ID_PCM_S24LE,  1 },
  88     { CODEC_ID_PCM_S16LE,  1 },
  89     { CODEC_ID_NONE }
  90 };
  91
  92 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st);
  93 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st);
  94 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st);
  95 static void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st);
  96 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st);
  97
  98 static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {
  99     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },
 100       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },
 101       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },
 102       mxf_write_mpegvideo_desc },
 103     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },
 104       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },
 105       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 106       mxf_write_aes3_desc },
 107     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },
 108       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },
 109       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 110       mxf_write_wav_desc },
 111     // D-10 625/50 PAL 50mb/s
 112     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },
 113       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 114       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 },
 115       mxf_write_cdci_desc },
 116     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },
 117       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 118       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 119       mxf_write_generic_sound_desc },
 120     // D-10 525/60 NTSC 50mb/s
 121     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },
 122       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 123       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x02 },
 124       mxf_write_cdci_desc },
 125     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },
 126       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 127       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 128       mxf_write_generic_sound_desc },
 129     // D-10 625/50 PAL 40mb/s
 130     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },
 131       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 132       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x03 },
 133       mxf_write_cdci_desc },
 134     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },
 135       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 136       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 137       mxf_write_generic_sound_desc },
 138     // D-10 525/60 NTSC 40mb/s
 139     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },
 140       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 141       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x04 },
 142       mxf_write_cdci_desc },
 143     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },
 144       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 145       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 146       mxf_write_generic_sound_desc },
 147     // D-10 625/50 PAL 30mb/s
 148     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },
 149       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 150       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 },
 151       mxf_write_cdci_desc },
 152     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },
 153       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 154       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 155       mxf_write_generic_sound_desc },
 156     // D-10 525/60 NTSC 30mb/s
 157     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },
 158       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 159       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x06 },
 160       mxf_write_cdci_desc },
 161     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },
 162       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 163       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 164       mxf_write_generic_sound_desc },
 165     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
 166       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
 167       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
 168       NULL },
 169 };
 170
 171 typedef struct MXFContext {
 172     int64_t footer_partition_offset;
 173     int essence_container_count;
 174     AVRational time_base;
 175     int header_written;
 176     MXFIndexEntry *index_entries;
 177     unsigned edit_units_count;
 178     uint64_t timestamp;   ///< timestamp, as year(16),month(8),day(8),hour(8),minutes(8),msec/4(8)
 179     uint8_t slice_count;  ///< index slice count minus 1 (1 if no audio, 0 otherwise)
 180     int last_indexed_edit_unit;
 181     uint64_t *body_partition_offset;
 182     unsigned body_partitions_count;
 183     int last_key_index;  ///< index of last key frame
 184     uint64_t duration;
 185     AVStream *timecode_track;
 186     int timecode_base;       ///< rounded time code base (25 or 30)
 187     int timecode_start;      ///< frame number computed from mpeg-2 gop header timecode
 188     int timecode_drop_frame; ///< time code use drop frame method frop mpeg-2 essence gop header
 189     int edit_unit_byte_count; ///< fixed edit unit byte count
 190     uint64_t body_offset;
 191     uint32_t instance_number;
 192     uint8_t umid[16];        ///< unique material identifier
 193 } MXFContext;
 194
 195 static const uint8_t uuid_base[]            = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };
 196 static const uint8_t umid_ul[]              = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x01,0x0D,0x00,0x13 };
 197
 198 /**
 199  * complete key for operation pattern, partitions, and primer pack
 200  */
 201 static const uint8_t op1a_ul[]                     = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x09,0x00 };
 202 static const uint8_t footer_partition_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }; // ClosedComplete
 203 static const uint8_t primer_pack_key[]             = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x05,0x01,0x00 };
 204 static const uint8_t index_table_segment_key[]     = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 };
 205 static const uint8_t random_index_pack_key[]       = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
 206 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
 207 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
 208 static const uint8_t klv_fill_key[]                = { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x03,0x01,0x02,0x10,0x01,0x00,0x00,0x00 };
 209 static const uint8_t body_partition_key[]          = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }; // ClosedComplete
 210
 211 /**
 212  * partial key for header metadata
 213  */
 214 static const uint8_t header_metadata_key[]  = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01 };
 215 static const uint8_t multiple_desc_ul[]     = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x0D,0x01,0x03,0x01,0x02,0x7F,0x01,0x00 };
 216
 217 /**
 218  * SMPTE RP210 http://www.smpte-ra.org/mdd/index.html
 219  */
 220 static const MXFLocalTagPair mxf_local_tag_batch[] = {
 221     // preface set
 222     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */
 223     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */
 224     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */
 225     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */
 226     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */
 227     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */
 228     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */
 229     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */
 230     // Identification
 231     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */
 232     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */
 233     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */
 234     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */
 235     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */
 236     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */
 237     // Content Storage
 238     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */
 239     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */
 240     // Essence Container Data
 241     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */
 242     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */
 243     // Package
 244     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */
 245     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */
 246     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */
 247     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */
 248     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */
 249     // Track
 250     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */
 251     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */
 252     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */
 253     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */
 254     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */
 255     // Sequence
 256     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */
 257     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */
 258     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */
 259     // Source Clip
 260     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */
 261     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */
 262     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */
 263     // Timecode Component
 264     { 0x1501, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x05,0x00,0x00}}, /* Start Time Code */
 265     { 0x1502, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x04,0x01,0x01,0x02,0x06,0x00,0x00}}, /* Rounded Time Code Base */
 266     { 0x1503, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x04,0x01,0x01,0x05,0x00,0x00,0x00}}, /* Drop Frame */
 267     // File Descriptor
 268     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */
 269     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */
 270     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */
 271     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */
 272     // Generic Picture Essence Descriptor
 273     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */
 274     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */
 275     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */
 276     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */
 277     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */
 278     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */
 279     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */
 280     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */
 281     // CDCI Picture Essence Descriptor
 282     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */
 283     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */
 284     // Generic Sound Essence Descriptor
 285     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */
 286     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */
 287     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */
 288     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */
 289     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */
 290     // Index Table Segment
 291     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */
 292     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */
 293     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */
 294     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */
 295     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */
 296     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */
 297     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */
 298     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */
 299     // MPEG video Descriptor
 300     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */
 301     { 0x8007, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0A,0x00,0x00}}, /* ProfileAndLevel */
 302     // Wave Audio Essence Descriptor
 303     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */
 304     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */
 305 };
 306
 307 static void mxf_write_uuid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
 308 {
 309     put_buffer(pb, uuid_base, 12);
 310     put_be16(pb, type);
 311     put_be16(pb, value);
 312 }
 313
 314 static void mxf_write_umid(AVFormatContext *s, int type)
 315 {
 316     MXFContext *mxf = s->priv_data;
 317     put_buffer(s->pb, umid_ul, 13);
 318     put_be24(s->pb, mxf->instance_number);
 319     put_buffer(s->pb, mxf->umid, 15);
 320     put_byte(s->pb, type);
 321 }
 322
 323 static void mxf_write_refs_count(ByteIOContext *pb, int ref_count)
 324 {
 325     put_be32(pb, ref_count);
 326     put_be32(pb, 16);
 327 }
 328
 329 static int klv_ber_length(uint64_t len)
 330 {
 331     if (len < 128)
 332         return 1;
 333     else
 334         return (av_log2(len) >> 3) + 2;
 335 }
 336
 337 static int klv_encode_ber_length(ByteIOContext *pb, uint64_t len)
 338 {
 339     // Determine the best BER size
 340     int size;
 341     if (len < 128) {
 342         //short form
 343         put_byte(pb, len);
 344         return 1;
 345     }
 346
 347     size = (av_log2(len) >> 3) + 1;
 348
 349     // long form
 350     put_byte(pb, 0x80 + size);
 351     while(size) {
 352         size--;
 353         put_byte(pb, len >> 8 * size & 0xff);
 354     }
 355     return 0;
 356 }
 357
 358 static void klv_encode_ber4_length(ByteIOContext *pb, int len)
 359 {
 360     put_byte(pb, 0x80 + 3);
 361     put_be24(pb, len);
 362 }
 363
 364 /*
 365  * Get essence container ul index
 366  */
 367 static int mxf_get_essence_container_ul_index(enum CodecID id)
 368 {
 369     int i;
 370     for (i = 0; mxf_essence_mappings[i].id; i++)
 371         if (mxf_essence_mappings[i].id == id)
 372             return mxf_essence_mappings[i].index;
 373     return -1;
 374 }
 375
 376 static void mxf_write_primer_pack(AVFormatContext *s)
 377 {
 378     ByteIOContext *pb = s->pb;
 379     int local_tag_number, i = 0;
 380
 381     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);
 382
 383     put_buffer(pb, primer_pack_key, 16);
 384     klv_encode_ber_length(pb, local_tag_number * 18 + 8);
 385
 386     put_be32(pb, local_tag_number); // local_tag num
 387     put_be32(pb, 18); // item size, always 18 according to the specs
 388
 389     for (i = 0; i < local_tag_number; i++) {
 390         put_be16(pb, mxf_local_tag_batch[i].local_tag);
 391         put_buffer(pb, mxf_local_tag_batch[i].uid, 16);
 392     }
 393 }
 394
 395 static void mxf_write_local_tag(ByteIOContext *pb, int size, int tag)
 396 {
 397     put_be16(pb, tag);
 398     put_be16(pb, size);
 399 }
 400
 401 static void mxf_write_metadata_key(ByteIOContext *pb, unsigned int value)
 402 {
 403     put_buffer(pb, header_metadata_key, 13);
 404     put_be24(pb, value);
 405 }
 406
 407 static void mxf_free(AVFormatContext *s)
 408 {
 409     int i;
 410
 411     for (i = 0; i < s->nb_streams; i++) {
 412         AVStream *st = s->streams[i];
 413         av_freep(&st->priv_data);
 414     }
 415 }
 416
 417 static const MXFCodecUL *mxf_get_data_definition_ul(int type)
 418 {
 419     const MXFCodecUL *uls = ff_mxf_data_definition_uls;
 420     while (uls->uid[0]) {
 421         if (type == uls->id)
 422             break;
 423         uls++;
 424     }
 425     return uls;
 426 }
 427
 428 static void mxf_write_essence_container_refs(AVFormatContext *s)
 429 {
 430     MXFContext *c = s->priv_data;
 431     ByteIOContext *pb = s->pb;
 432     int i;
 433
 434     mxf_write_refs_count(pb, c->essence_container_count);
 435     av_log(s,AV_LOG_DEBUG, "essence container count:%d\n", c->essence_container_count);
 436     for (i = 0; i < c->essence_container_count; i++) {
 437         MXFStreamContext *sc = s->streams[i]->priv_data;
 438         put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
 439     }
 440 }
 441
 442 static void mxf_write_preface(AVFormatContext *s)
 443 {
 444     MXFContext *mxf = s->priv_data;
 445     ByteIOContext *pb = s->pb;
 446
 447     mxf_write_metadata_key(pb, 0x012f00);
 448     PRINT_KEY(s, "preface key", pb->buf_ptr - 16);
 449     klv_encode_ber_length(pb, 130 + 16 * mxf->essence_container_count);
 450
 451     // write preface set uid
 452     mxf_write_local_tag(pb, 16, 0x3C0A);
 453     mxf_write_uuid(pb, Preface, 0);
 454     PRINT_KEY(s, "preface uid", pb->buf_ptr - 16);
 455
 456     // last modified date
 457     mxf_write_local_tag(pb, 8, 0x3B02);
 458     put_be64(pb, mxf->timestamp);
 459
 460     // write version
 461     mxf_write_local_tag(pb, 2, 0x3B05);
 462     put_be16(pb, 258); // v1.2
 463
 464     // write identification_refs
 465     mxf_write_local_tag(pb, 16 + 8, 0x3B06);
 466     mxf_write_refs_count(pb, 1);
 467     mxf_write_uuid(pb, Identification, 0);
 468
 469     // write content_storage_refs
 470     mxf_write_local_tag(pb, 16, 0x3B03);
 471     mxf_write_uuid(pb, ContentStorage, 0);
 472
 473     // operational pattern
 474     mxf_write_local_tag(pb, 16, 0x3B09);
 475     put_buffer(pb, op1a_ul, 16);
 476
 477     // write essence_container_refs
 478     mxf_write_local_tag(pb, 8 + 16 * mxf->essence_container_count, 0x3B0A);
 479     mxf_write_essence_container_refs(s);
 480
 481     // write dm_scheme_refs
 482     mxf_write_local_tag(pb, 8, 0x3B0B);
 483     put_be64(pb, 0);
 484 }
 485
 486 /*
 487  * Write a local tag containing an ascii string as utf-16
 488  */
 489 static void mxf_write_local_tag_utf16(ByteIOContext *pb, int tag, const char *value)
 490 {
 491     int i, size = strlen(value);
 492     mxf_write_local_tag(pb, size*2, tag);
 493     for (i = 0; i < size; i++)
 494         put_be16(pb, value[i]);
 495 }
 496
 497 static void mxf_write_identification(AVFormatContext *s)
 498 {
 499     MXFContext *mxf = s->priv_data;
 500     ByteIOContext *pb = s->pb;
 501     const char *company = "FFmpeg";
 502     const char *product = "OP1a Muxer";
 503     const char *version;
 504     int length;
 505
 506     mxf_write_metadata_key(pb, 0x013000);
 507     PRINT_KEY(s, "identification key", pb->buf_ptr - 16);
 508
 509     version = s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT ?
 510         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);
 511     length = 84 + (strlen(company)+strlen(product)+strlen(version))*2; // utf-16
 512     klv_encode_ber_length(pb, length);
 513
 514     // write uid
 515     mxf_write_local_tag(pb, 16, 0x3C0A);
 516     mxf_write_uuid(pb, Identification, 0);
 517     PRINT_KEY(s, "identification uid", pb->buf_ptr - 16);
 518
 519     // write generation uid
 520     mxf_write_local_tag(pb, 16, 0x3C09);
 521     mxf_write_uuid(pb, Identification, 1);
 522
 523     mxf_write_local_tag_utf16(pb, 0x3C01, company); // Company Name
 524     mxf_write_local_tag_utf16(pb, 0x3C02, product); // Product Name
 525     mxf_write_local_tag_utf16(pb, 0x3C04, version); // Version String
 526
 527     // write product uid
 528     mxf_write_local_tag(pb, 16, 0x3C05);
 529     mxf_write_uuid(pb, Identification, 2);
 530
 531     // modification date
 532     mxf_write_local_tag(pb, 8, 0x3C06);
 533     put_be64(pb, mxf->timestamp);
 534 }
 535
 536 static void mxf_write_content_storage(AVFormatContext *s)
 537 {
 538     ByteIOContext *pb = s->pb;
 539
 540     mxf_write_metadata_key(pb, 0x011800);
 541     PRINT_KEY(s, "content storage key", pb->buf_ptr - 16);
 542     klv_encode_ber_length(pb, 92);
 543
 544     // write uid
 545     mxf_write_local_tag(pb, 16, 0x3C0A);
 546     mxf_write_uuid(pb, ContentStorage, 0);
 547     PRINT_KEY(s, "content storage uid", pb->buf_ptr - 16);
 548
 549     // write package reference
 550     mxf_write_local_tag(pb, 16 * 2 + 8, 0x1901);
 551     mxf_write_refs_count(pb, 2);
 552     mxf_write_uuid(pb, MaterialPackage, 0);
 553     mxf_write_uuid(pb, SourcePackage, 0);
 554
 555     // write essence container data
 556     mxf_write_local_tag(pb, 8 + 16, 0x1902);
 557     mxf_write_refs_count(pb, 1);
 558     mxf_write_uuid(pb, EssenceContainerData, 0);
 559 }
 560
 561 static void mxf_write_track(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 562 {
 563     MXFContext *mxf = s->priv_data;
 564     ByteIOContext *pb = s->pb;
 565     MXFStreamContext *sc = st->priv_data;
 566
 567     mxf_write_metadata_key(pb, 0x013b00);
 568     PRINT_KEY(s, "track key", pb->buf_ptr - 16);
 569     klv_encode_ber_length(pb, 80);
 570
 571     // write track uid
 572     mxf_write_local_tag(pb, 16, 0x3C0A);
 573     mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, st->index);
 574     PRINT_KEY(s, "track uid", pb->buf_ptr - 16);
 575
 576     // write track id
 577     mxf_write_local_tag(pb, 4, 0x4801);
 578     put_be32(pb, st->index+2);
 579
 580     // write track number
 581     mxf_write_local_tag(pb, 4, 0x4804);
 582     if (type == MaterialPackage)
 583         put_be32(pb, 0); // track number of material package is 0
 584     else
 585         put_buffer(pb, sc->track_essence_element_key + 12, 4);
 586
 587     mxf_write_local_tag(pb, 8, 0x4B01);
 588     put_be32(pb, mxf->time_base.den);
 589     put_be32(pb, mxf->time_base.num);
 590
 591     // write origin
 592     mxf_write_local_tag(pb, 8, 0x4B02);
 593     put_be64(pb, 0);
 594
 595     // write sequence refs
 596     mxf_write_local_tag(pb, 16, 0x4803);
 597     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 598 }
 599
 600 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 };
 601
 602 static void mxf_write_common_fields(AVFormatContext *s, AVStream *st)
 603 {
 604     MXFContext *mxf = s->priv_data;
 605     ByteIOContext *pb = s->pb;
 606
 607     // find data define uls
 608     mxf_write_local_tag(pb, 16, 0x0201);
 609     if (st == mxf->timecode_track)
 610         put_buffer(pb, smpte_12m_timecode_track_data_ul, 16);
 611     else {
 612         const MXFCodecUL *data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);
 613         put_buffer(pb, data_def_ul->uid, 16);
 614     }
 615
 616     // write duration
 617     mxf_write_local_tag(pb, 8, 0x0202);
 618     put_be64(pb, mxf->duration);
 619 }
 620
 621 static void mxf_write_sequence(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 622 {
 623     MXFContext *mxf = s->priv_data;
 624     ByteIOContext *pb = s->pb;
 625     enum MXFMetadataSetType component;
 626
 627     mxf_write_metadata_key(pb, 0x010f00);
 628     PRINT_KEY(s, "sequence key", pb->buf_ptr - 16);
 629     klv_encode_ber_length(pb, 80);
 630
 631     mxf_write_local_tag(pb, 16, 0x3C0A);
 632     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 633
 634     PRINT_KEY(s, "sequence uid", pb->buf_ptr - 16);
 635     mxf_write_common_fields(s, st);
 636
 637     // write structural component
 638     mxf_write_local_tag(pb, 16 + 8, 0x1001);
 639     mxf_write_refs_count(pb, 1);
 640     if (st == mxf->timecode_track)
 641         component = TimecodeComponent;
 642     else
 643         component = SourceClip;
 644     if (type == SourcePackage)
 645         component += TypeBottom;
 646     mxf_write_uuid(pb, component, st->index);
 647 }
 648
 649 static void mxf_write_timecode_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 650 {
 651     MXFContext *mxf = s->priv_data;
 652     ByteIOContext *pb = s->pb;
 653
 654     mxf_write_metadata_key(pb, 0x011400);
 655     klv_encode_ber_length(pb, 75);
 656
 657     // UID
 658     mxf_write_local_tag(pb, 16, 0x3C0A);
 659     mxf_write_uuid(pb, type == MaterialPackage ? TimecodeComponent :
 660                    TimecodeComponent + TypeBottom, st->index);
 661
 662     mxf_write_common_fields(s, st);
 663
 664     // Start Time Code
 665     mxf_write_local_tag(pb, 8, 0x1501);
 666     put_be64(pb, mxf->timecode_start);
 667
 668     // Rounded Time Code Base
 669     mxf_write_local_tag(pb, 2, 0x1502);
 670     put_be16(pb, mxf->timecode_base);
 671
 672     // Drop Frame
 673     mxf_write_local_tag(pb, 1, 0x1503);
 674     put_byte(pb, mxf->timecode_drop_frame);
 675 }
 676
 677 static void mxf_write_structural_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 678 {
 679     ByteIOContext *pb = s->pb;
 680     int i;
 681
 682     mxf_write_metadata_key(pb, 0x011100);
 683     PRINT_KEY(s, "sturctural component key", pb->buf_ptr - 16);
 684     klv_encode_ber_length(pb, 108);
 685
 686     // write uid
 687     mxf_write_local_tag(pb, 16, 0x3C0A);
 688     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
 689
 690     PRINT_KEY(s, "structural component uid", pb->buf_ptr - 16);
 691     mxf_write_common_fields(s, st);
 692
 693     // write start_position
 694     mxf_write_local_tag(pb, 8, 0x1201);
 695     put_be64(pb, 0);
 696
 697     // write source package uid, end of the reference
 698     mxf_write_local_tag(pb, 32, 0x1101);
 699     if (type == SourcePackage) {
 700         for (i = 0; i < 4; i++)
 701             put_be64(pb, 0);
 702     } else
 703         mxf_write_umid(s, 1);
 704
 705     // write source track id
 706     mxf_write_local_tag(pb, 4, 0x1102);
 707     if (type == SourcePackage)
 708         put_be32(pb, 0);
 709     else
 710         put_be32(pb, st->index+2);
 711 }
 712
 713 static void mxf_write_multi_descriptor(AVFormatContext *s)
 714 {
 715     MXFContext *mxf = s->priv_data;
 716     ByteIOContext *pb = s->pb;
 717     const uint8_t *ul;
 718     int i;
 719
 720     mxf_write_metadata_key(pb, 0x014400);
 721     PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);
 722     klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);
 723
 724     mxf_write_local_tag(pb, 16, 0x3C0A);
 725     mxf_write_uuid(pb, MultipleDescriptor, 0);
 726     PRINT_KEY(s, "multi_desc uid", pb->buf_ptr - 16);
 727
 728     // write sample rate
 729     mxf_write_local_tag(pb, 8, 0x3001);
 730     put_be32(pb, mxf->time_base.den);
 731     put_be32(pb, mxf->time_base.num);
 732
 733     // write essence container ul
 734     mxf_write_local_tag(pb, 16, 0x3004);
 735     if (mxf->essence_container_count > 1)
 736         ul = multiple_desc_ul;
 737     else {
 738         MXFStreamContext *sc = s->streams[0]->priv_data;
 739         ul = mxf_essence_container_uls[sc->index].container_ul;
 740     }
 741     put_buffer(pb, ul, 16);
 742
 743     // write sub descriptor refs
 744     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x3F01);
 745     mxf_write_refs_count(pb, s->nb_streams);
 746     for (i = 0; i < s->nb_streams; i++)
 747         mxf_write_uuid(pb, SubDescriptor, i);
 748 }
 749
 750 static void mxf_write_generic_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 751 {
 752     MXFContext *mxf = s->priv_data;
 753     MXFStreamContext *sc = st->priv_data;
 754     ByteIOContext *pb = s->pb;
 755
 756     put_buffer(pb, key, 16);
 757     klv_encode_ber4_length(pb, size+20+8+12+20);
 758
 759     mxf_write_local_tag(pb, 16, 0x3C0A);
 760     mxf_write_uuid(pb, SubDescriptor, st->index);
 761
 762     mxf_write_local_tag(pb, 4, 0x3006);
 763     put_be32(pb, st->index+2);
 764
 765     mxf_write_local_tag(pb, 8, 0x3001);
 766     put_be32(pb, mxf->time_base.den);
 767     put_be32(pb, mxf->time_base.num);
 768
 769     mxf_write_local_tag(pb, 16, 0x3004);
 770     put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
 771 }
 772
 773 static const UID mxf_mpegvideo_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 };
 774 static const UID mxf_wav_descriptor_key       = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 };
 775 static const UID mxf_aes3_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 };
 776 static const UID mxf_cdci_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x28,0x00 };
 777 static const UID mxf_generic_sound_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x42,0x00 };
 778
 779 static void mxf_write_cdci_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 780 {
 781     MXFStreamContext *sc = st->priv_data;
 782     ByteIOContext *pb = s->pb;
 783     int stored_height = (st->codec->height+15)/16*16;
 784     int display_height;
 785     int f1, f2;
 786
 787     mxf_write_generic_desc(s, st, key, size+8+8+8+8+8+8+5+16+sc->interlaced*4+12+20);
 788
 789     mxf_write_local_tag(pb, 4, 0x3203);
 790     put_be32(pb, st->codec->width);
 791
 792     mxf_write_local_tag(pb, 4, 0x3202);
 793     put_be32(pb, stored_height>>sc->interlaced);
 794
 795     mxf_write_local_tag(pb, 4, 0x3209);
 796     put_be32(pb, st->codec->width);
 797
 798     if (st->codec->height == 608) // PAL + VBI
 799         display_height = 576;
 800     else if (st->codec->height == 512)  // NTSC + VBI
 801         display_height = 486;
 802     else
 803         display_height = st->codec->height;
 804
 805     mxf_write_local_tag(pb, 4, 0x3208);
 806     put_be32(pb, display_height>>sc->interlaced);
 807
 808     // component depth
 809     mxf_write_local_tag(pb, 4, 0x3301);
 810     put_be32(pb, 8);
 811
 812     // horizontal subsampling
 813     mxf_write_local_tag(pb, 4, 0x3302);
 814     put_be32(pb, 2);
 815
 816     // frame layout
 817     mxf_write_local_tag(pb, 1, 0x320C);
 818     put_byte(pb, sc->interlaced);
 819
 820     // video line map
 821     switch (st->codec->height) {
 822     case  576: f1 = 23; f2 = 336; break;
 823     case  608: f1 =  7; f2 = 320; break;
 824     case  480: f1 = 20; f2 = 283; break;
 825     case  512: f1 =  7; f2 = 270; break;
 826     case  720: f1 = 26; f2 =   0; break; // progressive
 827     case 1080: f1 = 21; f2 = 584; break;
 828     default:   f1 =  0; f2 =   0; break;
 829     }
 830
 831     if (!sc->interlaced) {
 832         f2  = 0;
 833         f1 *= 2;
 834     }
 835
 836     mxf_write_local_tag(pb, 12+sc->interlaced*4, 0x320D);
 837     put_be32(pb, sc->interlaced ? 2 : 1);
 838     put_be32(pb, 4);
 839     put_be32(pb, f1);
 840     if (sc->interlaced)
 841         put_be32(pb, f2);
 842
 843     mxf_write_local_tag(pb, 8, 0x320E);
 844     put_be32(pb, sc->aspect_ratio.num);
 845     put_be32(pb, sc->aspect_ratio.den);
 846
 847     mxf_write_local_tag(pb, 16, 0x3201);
 848     put_buffer(pb, *sc->codec_ul, 16);
 849 }
 850
 851 static void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st)
 852 {
 853     mxf_write_cdci_common(s, st, mxf_cdci_descriptor_key, 0);
 854 }
 855
 856 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
 857 {
 858     ByteIOContext *pb = s->pb;
 859     int profile_and_level = (st->codec->profile<<4) | st->codec->level;
 860
 861     mxf_write_cdci_common(s, st, mxf_mpegvideo_descriptor_key, 8+5);
 862
 863     // bit rate
 864     mxf_write_local_tag(pb, 4, 0x8000);
 865     put_be32(pb, st->codec->bit_rate);
 866
 867     // profile and level
 868     mxf_write_local_tag(pb, 1, 0x8007);
 869     if (!st->codec->profile)
 870         profile_and_level |= 0x80; // escape bit
 871     put_byte(pb, profile_and_level);
 872 }
 873
 874 static void mxf_write_generic_sound_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 875 {
 876     ByteIOContext *pb = s->pb;
 877
 878     mxf_write_generic_desc(s, st, key, size+5+12+8+8);
 879
 880     // audio locked
 881     mxf_write_local_tag(pb, 1, 0x3D02);
 882     put_byte(pb, 1);
 883
 884     // write audio sampling rate
 885     mxf_write_local_tag(pb, 8, 0x3D03);
 886     put_be32(pb, st->codec->sample_rate);
 887     put_be32(pb, 1);
 888
 889     mxf_write_local_tag(pb, 4, 0x3D07);
 890     put_be32(pb, st->codec->channels);
 891
 892     mxf_write_local_tag(pb, 4, 0x3D01);
 893     put_be32(pb, av_get_bits_per_sample(st->codec->codec_id));
 894 }
 895
 896 static void mxf_write_wav_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 897 {
 898     ByteIOContext *pb = s->pb;
 899
 900     mxf_write_generic_sound_common(s, st, key, size+6+8);
 901
 902     mxf_write_local_tag(pb, 2, 0x3D0A);
 903     put_be16(pb, st->codec->block_align);
 904
 905     // avg bytes per sec
 906     mxf_write_local_tag(pb, 4, 0x3D09);
 907     put_be32(pb, st->codec->block_align*st->codec->sample_rate);
 908 }
 909
 910 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)
 911 {
 912     mxf_write_wav_common(s, st, mxf_wav_descriptor_key, 0);
 913 }
 914
 915 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)
 916 {
 917     mxf_write_wav_common(s, st, mxf_aes3_descriptor_key, 0);
 918 }
 919
 920 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st)
 921 {
 922     mxf_write_generic_sound_common(s, st, mxf_generic_sound_descriptor_key, 0);
 923 }
 924
 925 static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)
 926 {
 927     MXFContext *mxf = s->priv_data;
 928     ByteIOContext *pb = s->pb;
 929     int i, track_count = s->nb_streams+1;
 930
 931     if (type == MaterialPackage) {
 932         mxf_write_metadata_key(pb, 0x013600);
 933         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);
 934         klv_encode_ber_length(pb, 92 + 16*track_count);
 935     } else {
 936         mxf_write_metadata_key(pb, 0x013700);
 937         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);
 938         klv_encode_ber_length(pb, 112 + 16*track_count); // 20 bytes length for descriptor reference
 939     }
 940
 941     // write uid
 942     mxf_write_local_tag(pb, 16, 0x3C0A);
 943     mxf_write_uuid(pb, type, 0);
 944     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);
 945     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);
 946
 947     // write package umid
 948     mxf_write_local_tag(pb, 32, 0x4401);
 949     mxf_write_umid(s, type == SourcePackage);
 950     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);
 951
 952     // package creation date
 953     mxf_write_local_tag(pb, 8, 0x4405);
 954     put_be64(pb, mxf->timestamp);
 955
 956     // package modified date
 957     mxf_write_local_tag(pb, 8, 0x4404);
 958     put_be64(pb, mxf->timestamp);
 959
 960     // write track refs
 961     mxf_write_local_tag(pb, track_count*16 + 8, 0x4403);
 962     mxf_write_refs_count(pb, track_count);
 963     mxf_write_uuid(pb, type == MaterialPackage ? Track :
 964                    Track + TypeBottom, -1); // timecode track
 965     for (i = 0; i < s->nb_streams; i++)
 966         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);
 967
 968     // write multiple descriptor reference
 969     if (type == SourcePackage) {
 970         mxf_write_local_tag(pb, 16, 0x4701);
 971         if (s->nb_streams > 1) {
 972             mxf_write_uuid(pb, MultipleDescriptor, 0);
 973             mxf_write_multi_descriptor(s);
 974         } else
 975             mxf_write_uuid(pb, SubDescriptor, 0);
 976     }
 977
 978     // write timecode track
 979     mxf_write_track(s, mxf->timecode_track, type);
 980     mxf_write_sequence(s, mxf->timecode_track, type);
 981     mxf_write_timecode_component(s, mxf->timecode_track, type);
 982
 983     for (i = 0; i < s->nb_streams; i++) {
 984         AVStream *st = s->streams[i];
 985         mxf_write_track(s, st, type);
 986         mxf_write_sequence(s, st, type);
 987         mxf_write_structural_component(s, st, type);
 988
 989         if (type == SourcePackage) {
 990             MXFStreamContext *sc = st->priv_data;
 991             mxf_essence_container_uls[sc->index].write_desc(s, st);
 992         }
 993     }
 994 }
 995
 996 static int mxf_write_essence_container_data(AVFormatContext *s)
 997 {
 998     ByteIOContext *pb = s->pb;
 999
1000     mxf_write_metadata_key(pb, 0x012300);
1001     klv_encode_ber_length(pb, 72);
1002
1003     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID
1004     mxf_write_uuid(pb, EssenceContainerData, 0);
1005
1006     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID
1007     mxf_write_umid(s, 1);
1008
1009     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID
1010     put_be32(pb, 1);
1011
1012     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID
1013     put_be32(pb, 2);
1014
1015     return 0;
1016 }
1017
1018 static int mxf_write_header_metadata_sets(AVFormatContext *s)
1019 {
1020     mxf_write_preface(s);
1021     mxf_write_identification(s);
1022     mxf_write_content_storage(s);
1023     mxf_write_package(s, MaterialPackage);
1024     mxf_write_package(s, SourcePackage);
1025     mxf_write_essence_container_data(s);
1026     return 0;
1027 }
1028
1029 static unsigned klv_fill_size(uint64_t size)
1030 {
1031     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));
1032     if (pad < 20) // smallest fill item possible
1033         return pad + KAG_SIZE;
1034     else
1035         return pad & (KAG_SIZE-1);
1036 }
1037
1038 static void mxf_write_index_table_segment(AVFormatContext *s)
1039 {
1040     MXFContext *mxf = s->priv_data;
1041     ByteIOContext *pb = s->pb;
1042     int i, j;
1043     int temporal_reordering = 0;
1044     int key_index = mxf->last_key_index;
1045
1046     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);
1047
1048     if (!mxf->edit_units_count && !mxf->edit_unit_byte_count)
1049         return;
1050
1051     put_buffer(pb, index_table_segment_key, 16);
1052
1053     if (mxf->edit_unit_byte_count) {
1054         klv_encode_ber_length(pb, 80);
1055     } else {
1056         klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1)*6 +
1057                               12+mxf->edit_units_count*(11+mxf->slice_count*4));
1058     }
1059
1060     // instance id
1061     mxf_write_local_tag(pb, 16, 0x3C0A);
1062     mxf_write_uuid(pb, IndexTableSegment, 0);
1063
1064     // index edit rate
1065     mxf_write_local_tag(pb, 8, 0x3F0B);
1066     put_be32(pb, mxf->time_base.den);
1067     put_be32(pb, mxf->time_base.num);
1068
1069     // index start position
1070     mxf_write_local_tag(pb, 8, 0x3F0C);
1071     put_be64(pb, mxf->last_indexed_edit_unit);
1072
1073     // index duration
1074     mxf_write_local_tag(pb, 8, 0x3F0D);
1075     if (mxf->edit_unit_byte_count)
1076         put_be64(pb, 0); // index table covers whole container
1077     else
1078         put_be64(pb, mxf->edit_units_count);
1079
1080     // edit unit byte count
1081     mxf_write_local_tag(pb, 4, 0x3F05);
1082     put_be32(pb, mxf->edit_unit_byte_count);
1083
1084     // index sid
1085     mxf_write_local_tag(pb, 4, 0x3F06);
1086     put_be32(pb, 2);
1087
1088     // body sid
1089     mxf_write_local_tag(pb, 4, 0x3F07);
1090     put_be32(pb, 1);
1091
1092     if (!mxf->edit_unit_byte_count) {
1093         // real slice count - 1
1094         mxf_write_local_tag(pb, 1, 0x3F08);
1095         put_byte(pb, mxf->slice_count);
1096
1097         // delta entry array
1098         mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);
1099         put_be32(pb, s->nb_streams+1); // num of entries
1100         put_be32(pb, 6);               // size of one entry
1101         // write system item delta entry
1102         put_byte(pb, 0);
1103         put_byte(pb, 0); // slice entry
1104         put_be32(pb, 0); // element delta
1105         for (i = 0; i < s->nb_streams; i++) {
1106             AVStream *st = s->streams[i];
1107             MXFStreamContext *sc = st->priv_data;
1108             put_byte(pb, sc->temporal_reordering);
1109             if (sc->temporal_reordering)
1110                 temporal_reordering = 1;
1111             if (i == 0) { // video track
1112                 put_byte(pb, 0); // slice number
1113                 put_be32(pb, KAG_SIZE); // system item size including klv fill
1114             } else { // audio track
1115                 unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;
1116                 audio_frame_size += klv_fill_size(audio_frame_size);
1117                 put_byte(pb, 1);
1118                 put_be32(pb, (i-1)*audio_frame_size); // element delta
1119             }
1120         }
1121
1122         mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);
1123         put_be32(pb, mxf->edit_units_count);  // num of entries
1124         put_be32(pb, 11+mxf->slice_count*4);  // size of one entry
1125         for (i = 0; i < mxf->edit_units_count; i++) {
1126             int temporal_offset = 0;
1127             if (temporal_reordering) {
1128                 for (j = i+1; j < mxf->edit_units_count; j++) {
1129                     temporal_offset++;
1130                     if (mxf->index_entries[j].flags & 0x10) { // backward prediction
1131                         // next is not b, so is reordered
1132                         if (!(mxf->index_entries[i+1].flags & 0x10)) {
1133                             if ((mxf->index_entries[i].flags & 0x11) == 0) // I frame
1134                                 temporal_offset = 0;
1135                             else
1136                                 temporal_offset = -temporal_offset;
1137                         }
1138                         break;
1139                     }
1140                 }
1141             }
1142             put_byte(pb, temporal_offset);
1143
1144             if (!(mxf->index_entries[i].flags & 0x33)) { // I frame
1145                 if (mxf->index_entries[i].flags & 0x40 && // seq header
1146                     (!temporal_reordering || !temporal_offset))
1147                     mxf->index_entries[i].flags |= 0x80; // random access
1148                 mxf->last_key_index = key_index;
1149                 key_index = i;
1150             }
1151             if ((mxf->index_entries[i].flags & 0x30) == 0x30) { // back and forward prediction
1152                 put_byte(pb, mxf->last_key_index - i);
1153             } else {
1154                 put_byte(pb, key_index - i); // key frame offset
1155                 if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward
1156                     mxf->last_key_index = key_index;
1157             }
1158             put_byte(pb, mxf->index_entries[i].flags);
1159             // stream offset
1160             put_be64(pb, mxf->index_entries[i].offset);
1161             if (s->nb_streams > 1)
1162                 put_be32(pb, mxf->index_entries[i].slice_offset);
1163         }
1164
1165         mxf->last_key_index = key_index - mxf->edit_units_count;
1166         mxf->last_indexed_edit_unit += mxf->edit_units_count;
1167         mxf->edit_units_count = 0;
1168     }
1169 }
1170
1171 static void mxf_write_klv_fill(AVFormatContext *s)
1172 {
1173     unsigned pad = klv_fill_size(url_ftell(s->pb));
1174     if (pad) {
1175         put_buffer(s->pb, klv_fill_key, 16);
1176         pad -= 16 + 4;
1177         klv_encode_ber4_length(s->pb, pad);
1178         for (; pad; pad--)
1179             put_byte(s->pb, 0);
1180         assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));
1181     }
1182 }
1183
1184 static void mxf_write_partition(AVFormatContext *s, int bodysid,
1185                                 int indexsid,
1186                                 const uint8_t *key, int write_metadata)
1187 {
1188     MXFContext *mxf = s->priv_data;
1189     ByteIOContext *pb = s->pb;
1190     int64_t header_byte_count_offset;
1191     unsigned index_byte_count = 0;
1192     uint64_t partition_offset = url_ftell(pb);
1193
1194     if (!mxf->edit_unit_byte_count && mxf->edit_units_count)
1195         index_byte_count = 85 + 12+(s->nb_streams+1)*6 +
1196             12+mxf->edit_units_count*(11+mxf->slice_count*4);
1197     else if (mxf->edit_unit_byte_count && indexsid)
1198         index_byte_count = 80;
1199
1200     if (index_byte_count) {
1201         // add encoded ber length
1202         index_byte_count += 16 + klv_ber_length(index_byte_count);
1203         index_byte_count += klv_fill_size(index_byte_count);
1204     }
1205
1206     if (!memcmp(key, body_partition_key, 16)) {
1207         mxf->body_partition_offset =
1208             av_realloc(mxf->body_partition_offset,
1209                        (mxf->body_partitions_count+1)*
1210                        sizeof(*mxf->body_partition_offset));
1211         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;
1212     }
1213
1214     // write klv
1215     put_buffer(pb, key, 16);
1216     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);
1217
1218     // write partition value
1219     put_be16(pb, 1); // majorVersion
1220     put_be16(pb, 2); // minorVersion
1221     put_be32(pb, KAG_SIZE); // KAGSize
1222
1223     put_be64(pb, partition_offset); // ThisPartition
1224
1225     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)
1226         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition
1227     else if (!memcmp(key, footer_partition_key, 16) && mxf->body_partitions_count)
1228         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition
1229     else
1230         put_be64(pb, 0);
1231
1232     put_be64(pb, mxf->footer_partition_offset); // footerPartition
1233
1234     // set offset
1235     header_byte_count_offset = url_ftell(pb);
1236     put_be64(pb, 0); // headerByteCount, update later
1237
1238     // indexTable
1239     put_be64(pb, index_byte_count); // indexByteCount
1240     put_be32(pb, index_byte_count ? indexsid : 0); // indexSID
1241
1242     // BodyOffset
1243     if (bodysid && mxf->edit_units_count && mxf->body_partitions_count) {
1244         put_be64(pb, mxf->body_offset);
1245     } else
1246         put_be64(pb, 0);
1247
1248     put_be32(pb, bodysid); // bodySID
1249
1250     // operational pattern
1251     put_buffer(pb, op1a_ul, 16);
1252
1253     // essence container
1254     mxf_write_essence_container_refs(s);
1255
1256     if (write_metadata) {
1257         // mark the start of the headermetadata and calculate metadata size
1258         int64_t pos, start;
1259         unsigned header_byte_count;
1260
1261         mxf_write_klv_fill(s);
1262         start = url_ftell(s->pb);
1263         mxf_write_primer_pack(s);
1264         mxf_write_header_metadata_sets(s);
1265         pos = url_ftell(s->pb);
1266         header_byte_count = pos - start + klv_fill_size(pos);
1267
1268         // update header_byte_count
1269         url_fseek(pb, header_byte_count_offset, SEEK_SET);
1270         put_be64(pb, header_byte_count);
1271         url_fseek(pb, pos, SEEK_SET);
1272     }
1273
1274     put_flush_packet(pb);
1275 }
1276
1277 static const UID mxf_mpeg2_codec_uls[] = {
1278     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame
1279     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP
1280     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame
1281     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP
1282     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame
1283     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP
1284     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame
1285     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP
1286 };
1287
1288 static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)
1289 {
1290     int long_gop = avctx->gop_size > 1 || avctx->has_b_frames;
1291
1292     if (avctx->profile == 4) { // Main
1293         if (avctx->level == 8) // Main
1294             return &mxf_mpeg2_codec_uls[0+long_gop];
1295         else if (avctx->level == 4) // High
1296             return &mxf_mpeg2_codec_uls[4+long_gop];
1297     } else if (avctx->profile == 0) { // 422
1298         if (avctx->level == 5) // Main
1299             return &mxf_mpeg2_codec_uls[2+long_gop];
1300         else if (avctx->level == 2) // High
1301             return &mxf_mpeg2_codec_uls[6+long_gop];
1302     }
1303     return NULL;
1304 }
1305
1306 static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt, int *flags)
1307 {
1308     MXFStreamContext *sc = st->priv_data;
1309     MXFContext *mxf = s->priv_data;
1310     uint32_t c = -1;
1311     int i;
1312
1313     *flags = 0;
1314
1315     for(i = 0; i < pkt->size - 4; i++) {
1316         c = (c<<8) + pkt->data[i];
1317         if (c == 0x1b5) {
1318             if ((pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
1319                 st->codec->profile = pkt->data[i+1] & 0x07;
1320                 st->codec->level   = pkt->data[i+2] >> 4;
1321             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext
1322                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame
1323                 break;
1324             }
1325         } else if (c == 0x1b8) { // gop
1326             if (pkt->data[i+4]>>6 & 0x01) { // closed
1327                 sc->closed_gop = 1;
1328                 if (*flags & 0x40) // sequence header present
1329                     *flags |= 0x80; // random access
1330             }
1331             if (!mxf->header_written) {
1332                 unsigned hours   =  (pkt->data[i+1]>>2) & 0x1f;
1333                 unsigned minutes = ((pkt->data[i+1] & 0x03) << 4) | (pkt->data[i+2]>>4);
1334                 unsigned seconds = ((pkt->data[i+2] & 0x07) << 3) | (pkt->data[i+3]>>5);
1335                 unsigned frames  = ((pkt->data[i+3] & 0x1f) << 1) | (pkt->data[i+4]>>7);
1336                 mxf->timecode_drop_frame = !!(pkt->data[i+1] & 0x80);
1337                 mxf->timecode_start = (hours*3600 + minutes*60 + seconds) *
1338                     mxf->timecode_base + frames;
1339                 if (mxf->timecode_drop_frame) {
1340                     unsigned tminutes = 60 * hours + minutes;
1341                     mxf->timecode_start -= 2 * (tminutes - tminutes / 10);
1342                 }
1343                 av_log(s, AV_LOG_DEBUG, "frame %d %d:%d:%d%c%d\n", mxf->timecode_start,
1344                        hours, minutes, seconds, mxf->timecode_drop_frame ? ';':':', frames);
1345             }
1346         } else if (c == 0x1b3) { // seq
1347             *flags |= 0x40;
1348             switch ((pkt->data[i+4]>>4) & 0xf) {
1349             case 2:  sc->aspect_ratio = (AVRational){  4,  3}; break;
1350             case 3:  sc->aspect_ratio = (AVRational){ 16,  9}; break;
1351             case 4:  sc->aspect_ratio = (AVRational){221,100}; break;
1352             default:
1353                 av_reduce(&sc->aspect_ratio.num, &sc->aspect_ratio.den,
1354                           st->codec->width, st->codec->height, 1024*1024);
1355             }
1356         } else if (c == 0x100) { // pic
1357             int pict_type = (pkt->data[i+2]>>3) & 0x07;
1358             if (pict_type == 2) { // P frame
1359                 *flags |= 0x22;
1360                 sc->closed_gop = 0; // reset closed gop, don't matter anymore
1361             } else if (pict_type == 3) { // B frame
1362                 if (sc->closed_gop)
1363                     *flags |= 0x13; // only backward prediction
1364                 else
1365                     *flags |= 0x33;
1366                 sc->temporal_reordering = -1;
1367             } else if (!pict_type) {
1368                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");
1369                 return 0;
1370             }
1371         }
1372     }
1373     if (s->oformat != &mxf_d10_muxer)
1374         sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);
1375     return !!sc->codec_ul;
1376 }
1377
1378 static uint64_t mxf_parse_timestamp(time_t timestamp)
1379 {
1380     struct tm *time = gmtime(&timestamp);
1381     return (uint64_t)(time->tm_year+1900) << 48 |
1382            (uint64_t)(time->tm_mon+1)     << 40 |
1383            (uint64_t) time->tm_mday       << 32 |
1384                       time->tm_hour       << 24 |
1385                       time->tm_min        << 16 |
1386                       time->tm_sec        << 8;
1387 }
1388
1389 static void mxf_gen_umid(AVFormatContext *s)
1390 {
1391     MXFContext *mxf = s->priv_data;
1392     uint32_t seed = ff_random_get_seed();
1393     uint64_t umid = seed + 0x5294713400000000LL;
1394
1395     AV_WB64(mxf->umid  , umid);
1396     AV_WB64(mxf->umid+8, umid>>8);
1397
1398     mxf->instance_number = seed;
1399 }
1400
1401 static int mxf_write_header(AVFormatContext *s)
1402 {
1403     MXFContext *mxf = s->priv_data;
1404     int i;
1405     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};
1406     const int *samples_per_frame = NULL;
1407
1408     if (!s->nb_streams)
1409         return -1;
1410
1411     for (i = 0; i < s->nb_streams; i++) {
1412         AVStream *st = s->streams[i];
1413         MXFStreamContext *sc = av_mallocz(sizeof(*sc));
1414         if (!sc)
1415             return AVERROR(ENOMEM);
1416         st->priv_data = sc;
1417
1418         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
1419             if (i != 0) {
1420                 av_log(s, AV_LOG_ERROR, "video stream must be first track\n");
1421                 return -1;
1422             }
1423             if (fabs(av_q2d(st->codec->time_base) - 1/25.0) < 0.0001) {
1424                 samples_per_frame = PAL_samples_per_frame;
1425                 mxf->time_base = (AVRational){ 1, 25 };
1426                 mxf->timecode_base = 25;
1427             } else if (fabs(av_q2d(st->codec->time_base) - 1001/30000.0) < 0.0001) {
1428                 samples_per_frame = NTSC_samples_per_frame;
1429                 mxf->time_base = (AVRational){ 1001, 30000 };
1430                 mxf->timecode_base = 30;
1431             } else {
1432                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");
1433                 return -1;
1434             }
1435             av_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);
1436             if (s->oformat == &mxf_d10_muxer) {
1437                 if (st->codec->bit_rate == 50000000)
1438                     if (mxf->time_base.den == 25) sc->index = 3;
1439                     else                          sc->index = 5;
1440                 else if (st->codec->bit_rate == 40000000)
1441                     if (mxf->time_base.den == 25) sc->index = 7;
1442                     else                          sc->index = 9;
1443                 else if (st->codec->bit_rate == 30000000)
1444                     if (mxf->time_base.den == 25) sc->index = 11;
1445                     else                          sc->index = 13;
1446                 else {
1447                     av_log(s, AV_LOG_ERROR, "error MXF D-10 only support 30/40/50 mbit/s\n");
1448                     return -1;
1449                 }
1450
1451                 mxf->edit_unit_byte_count = KAG_SIZE; // system element
1452                 mxf->edit_unit_byte_count += 16 + 4 + (uint64_t)st->codec->bit_rate *
1453                     mxf->time_base.num / (8*mxf->time_base.den);
1454                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);
1455                 mxf->edit_unit_byte_count += 16 + 4 + 4 + samples_per_frame[0]*8*4;
1456                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);
1457             }
1458         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1459             if (st->codec->sample_rate != 48000) {
1460                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");
1461                 return -1;
1462             }
1463             av_set_pts_info(st, 64, 1, st->codec->sample_rate);
1464             if (s->oformat == &mxf_d10_muxer) {
1465                 if (st->index != 1) {
1466                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support one audio track\n");
1467                     return -1;
1468                 }
1469                 if (st->codec->codec_id != CODEC_ID_PCM_S16LE &&
1470                     st->codec->codec_id != CODEC_ID_PCM_S24LE) {
1471                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support 16 or 24 bits le audio\n");
1472                 }
1473                 sc->index = ((MXFStreamContext*)s->streams[0]->priv_data)->index + 1;
1474             } else
1475             mxf->slice_count = 1;
1476         }
1477
1478         if (!sc->index) {
1479             sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);
1480             if (sc->index == -1) {
1481                 av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "
1482                        "codec not currently supported in container\n", i);
1483                 return -1;
1484             }
1485         }
1486
1487         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;
1488
1489         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);
1490         sc->track_essence_element_key[15] = present[sc->index];
1491         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);
1492
1493         if (!present[sc->index])
1494             mxf->essence_container_count++;
1495         present[sc->index]++;
1496     }
1497
1498     if (s->oformat == &mxf_d10_muxer) {
1499         mxf->essence_container_count = 1;
1500     }
1501
1502     if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))
1503         mxf_gen_umid(s);
1504
1505     for (i = 0; i < s->nb_streams; i++) {
1506         MXFStreamContext *sc = s->streams[i]->priv_data;
1507         // update element count
1508         sc->track_essence_element_key[13] = present[sc->index];
1509         sc->order = AV_RB32(sc->track_essence_element_key+12);
1510     }
1511
1512     if (s->timestamp)
1513         mxf->timestamp = mxf_parse_timestamp(s->timestamp);
1514     mxf->duration = -1;
1515
1516     mxf->timecode_track = av_mallocz(sizeof(*mxf->timecode_track));
1517     if (!mxf->timecode_track)
1518         return AVERROR(ENOMEM);
1519     mxf->timecode_track->priv_data = av_mallocz(sizeof(MXFStreamContext));
1520     if (!mxf->timecode_track->priv_data)
1521         return AVERROR(ENOMEM);
1522     mxf->timecode_track->index = -1;
1523
1524     if (!samples_per_frame)
1525         samples_per_frame = PAL_samples_per_frame;
1526
1527     if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)
1528         return -1;
1529
1530     return 0;
1531 }
1532
1533 static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };
1534 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 };
1535
1536 static uint32_t ff_framenum_to_12m_time_code(unsigned frame, int drop, int fps)
1537 {
1538     return (0                                    << 31) | // color frame flag
1539            (0                                    << 30) | // drop  frame flag
1540            ( ((frame % fps) / 10)                << 28) | // tens  of frames
1541            ( ((frame % fps) % 10)                << 24) | // units of frames
1542            (0                                    << 23) | // field phase (NTSC), b0 (PAL)
1543            ((((frame / fps) % 60) / 10)          << 20) | // tens  of seconds
1544            ((((frame / fps) % 60) % 10)          << 16) | // units of seconds
1545            (0                                    << 15) | // b0 (NTSC), b2 (PAL)
1546            ((((frame / (fps * 60)) % 60) / 10)   << 12) | // tens  of minutes
1547            ((((frame / (fps * 60)) % 60) % 10)   <<  8) | // units of minutes
1548            (0                                    <<  7) | // b1
1549            (0                                    <<  6) | // b2 (NSC), field phase (PAL)
1550            ((((frame / (fps * 3600) % 24)) / 10) <<  4) | // tens  of hours
1551            (  (frame / (fps * 3600) % 24)) % 10;          // units of hours
1552 }
1553
1554 static void mxf_write_system_item(AVFormatContext *s)
1555 {
1556     MXFContext *mxf = s->priv_data;
1557     ByteIOContext *pb = s->pb;
1558     unsigned frame;
1559     uint32_t time_code;
1560
1561     frame = mxf->timecode_start + mxf->last_indexed_edit_unit + mxf->edit_units_count;
1562
1563     // write system metadata pack
1564     put_buffer(pb, system_metadata_pack_key, 16);
1565     klv_encode_ber4_length(pb, 57);
1566     put_byte(pb, 0x5c); // UL, user date/time stamp, picture and sound item present
1567     put_byte(pb, 0x04); // content package rate
1568     put_byte(pb, 0x00); // content package type
1569     put_be16(pb, 0x00); // channel handle
1570     put_be16(pb, frame); // continuity count
1571     if (mxf->essence_container_count > 1)
1572         put_buffer(pb, multiple_desc_ul, 16);
1573     else {
1574         MXFStreamContext *sc = s->streams[0]->priv_data;
1575         put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
1576     }
1577     put_byte(pb, 0);
1578     put_be64(pb, 0);
1579     put_be64(pb, 0); // creation date/time stamp
1580
1581     put_byte(pb, 0x81); // SMPTE 12M time code
1582     time_code = ff_framenum_to_12m_time_code(frame, mxf->timecode_drop_frame, mxf->timecode_base);
1583     put_be32(pb, time_code);
1584     put_be32(pb, 0); // binary group data
1585     put_be64(pb, 0);
1586
1587     // write system metadata package set
1588     put_buffer(pb, system_metadata_package_set_key, 16);
1589     klv_encode_ber4_length(pb, 35);
1590     put_byte(pb, 0x83); // UMID
1591     put_be16(pb, 0x20);
1592     mxf_write_umid(s, 1);
1593 }
1594
1595 static void mxf_write_d10_video_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
1596 {
1597     MXFContext *mxf = s->priv_data;
1598     ByteIOContext *pb = s->pb;
1599     int packet_size = (uint64_t)st->codec->bit_rate*mxf->time_base.num /
1600         (8*mxf->time_base.den); // frame size
1601     int pad;
1602
1603     packet_size += 16 + 4;
1604     packet_size += klv_fill_size(packet_size);
1605
1606     klv_encode_ber4_length(pb, pkt->size);
1607     put_buffer(pb, pkt->data, pkt->size);
1608
1609     // ensure CBR muxing by padding to correct video frame size
1610     pad = packet_size - pkt->size - 16 - 4;
1611     if (pad > 20) {
1612         put_buffer(s->pb, klv_fill_key, 16);
1613         pad -= 16 + 4;
1614         klv_encode_ber4_length(s->pb, pad);
1615         for (; pad; pad--)
1616             put_byte(s->pb, 0);
1617         assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));
1618     } else {
1619         av_log(s, AV_LOG_WARNING, "cannot fill d-10 video packet\n");
1620         for (; pad > 0; pad--)
1621             put_byte(s->pb, 0);
1622     }
1623 }
1624
1625 static void mxf_write_d10_audio_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
1626 {
1627     MXFContext *mxf = s->priv_data;
1628     ByteIOContext *pb = s->pb;
1629     int frame_size = pkt->size / st->codec->block_align;
1630     uint8_t *samples = pkt->data;
1631     uint8_t *end = pkt->data + pkt->size;
1632     int i;
1633
1634     klv_encode_ber4_length(pb, 4 + frame_size*4*8);
1635
1636     put_byte(pb, (frame_size == 1920 ? 0 : (mxf->edit_units_count-1) % 5 + 1));
1637     put_le16(pb, frame_size);
1638     put_byte(pb, (1<<st->codec->channels)-1);
1639
1640     while (samples < end) {
1641         for (i = 0; i < st->codec->channels; i++) {
1642             uint32_t sample;
1643             if (st->codec->codec_id == CODEC_ID_PCM_S24LE) {
1644                 sample = AV_RL24(samples)<< 4;
1645                 samples += 3;
1646             } else {
1647                 sample = AV_RL16(samples)<<12;
1648                 samples += 2;
1649             }
1650             put_le32(pb, sample | i);
1651         }
1652         for (; i < 8; i++)
1653             put_le32(pb, i);
1654     }
1655 }
1656
1657 static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
1658 {
1659     MXFContext *mxf = s->priv_data;
1660     ByteIOContext *pb = s->pb;
1661     AVStream *st = s->streams[pkt->stream_index];
1662     MXFStreamContext *sc = st->priv_data;
1663     int flags = 0;
1664
1665     if (!mxf->edit_unit_byte_count && !(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {
1666         mxf->index_entries = av_realloc(mxf->index_entries,
1667             (mxf->edit_units_count + EDIT_UNITS_PER_BODY)*sizeof(*mxf->index_entries));
1668         if (!mxf->index_entries) {
1669             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");
1670             return -1;
1671         }
1672     }
1673
1674     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
1675         if (!mxf_parse_mpeg2_frame(s, st, pkt, &flags)) {
1676             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
1677             return -1;
1678         }
1679     }
1680
1681     if (!mxf->header_written) {
1682         if (mxf->edit_unit_byte_count) {
1683             mxf_write_partition(s, 1, 2, header_open_partition_key, 1);
1684             mxf_write_klv_fill(s);
1685             mxf_write_index_table_segment(s);
1686         } else {
1687             mxf_write_partition(s, 0, 0, header_open_partition_key, 1);
1688         }
1689         mxf->header_written = 1;
1690     }
1691
1692     if (st->index == 0) {
1693         if (!mxf->edit_unit_byte_count &&
1694             (!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&
1695             !(flags & 0x33)) { // I frame, Gop start
1696             mxf_write_klv_fill(s);
1697             mxf_write_partition(s, 1, 2, body_partition_key, 0);
1698
1699             mxf_write_klv_fill(s);
1700             mxf_write_index_table_segment(s);
1701         }
1702
1703         mxf_write_klv_fill(s);
1704         mxf_write_system_item(s);
1705
1706         if (!mxf->edit_unit_byte_count) {
1707             mxf->index_entries[mxf->edit_units_count].offset = mxf->body_offset;
1708             mxf->index_entries[mxf->edit_units_count].flags = flags;
1709             mxf->body_offset += KAG_SIZE; // size of system element
1710         }
1711         mxf->edit_units_count++;
1712     } else if (!mxf->edit_unit_byte_count && st->index == 1) {
1713         mxf->index_entries[mxf->edit_units_count-1].slice_offset =
1714             mxf->body_offset - mxf->index_entries[mxf->edit_units_count-1].offset;
1715     }
1716
1717     mxf_write_klv_fill(s);
1718     put_buffer(pb, sc->track_essence_element_key, 16); // write key
1719     if (s->oformat == &mxf_d10_muxer) {
1720         if (st->codec->codec_type == CODEC_TYPE_VIDEO)
1721             mxf_write_d10_video_packet(s, st, pkt);
1722         else
1723             mxf_write_d10_audio_packet(s, st, pkt);
1724     } else {
1725         klv_encode_ber4_length(pb, pkt->size); // write length
1726         put_buffer(pb, pkt->data, pkt->size);
1727         mxf->body_offset += 16+4+pkt->size + klv_fill_size(16+4+pkt->size);
1728     }
1729
1730     put_flush_packet(pb);
1731
1732     return 0;
1733 }
1734
1735 static void mxf_write_random_index_pack(AVFormatContext *s)
1736 {
1737     MXFContext *mxf = s->priv_data;
1738     ByteIOContext *pb = s->pb;
1739     uint64_t pos = url_ftell(pb);
1740     int i;
1741
1742     put_buffer(pb, random_index_pack_key, 16);
1743     klv_encode_ber_length(pb, 28 + 12*mxf->body_partitions_count);
1744
1745     if (mxf->edit_unit_byte_count)
1746         put_be32(pb, 1); // BodySID of header partition
1747     else
1748         put_be32(pb, 0);
1749     put_be64(pb, 0); // offset of header partition
1750
1751     for (i = 0; i < mxf->body_partitions_count; i++) {
1752         put_be32(pb, 1); // BodySID
1753         put_be64(pb, mxf->body_partition_offset[i]);
1754     }
1755
1756     put_be32(pb, 0); // BodySID of footer partition
1757     put_be64(pb, mxf->footer_partition_offset);
1758
1759     put_be32(pb, url_ftell(pb) - pos + 4);
1760 }
1761
1762 static int mxf_write_footer(AVFormatContext *s)
1763 {
1764     MXFContext *mxf = s->priv_data;
1765     ByteIOContext *pb = s->pb;
1766
1767     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;
1768
1769     mxf_write_klv_fill(s);
1770     mxf->footer_partition_offset = url_ftell(pb);
1771     if (mxf->edit_unit_byte_count) { // no need to repeat index
1772         mxf_write_partition(s, 0, 0, footer_partition_key, 0);
1773     } else {
1774         mxf_write_partition(s, 0, 2, footer_partition_key, 0);
1775
1776         mxf_write_klv_fill(s);
1777         mxf_write_index_table_segment(s);
1778     }
1779
1780     mxf_write_klv_fill(s);
1781     mxf_write_random_index_pack(s);
1782
1783     if (!url_is_streamed(s->pb)) {
1784         url_fseek(pb, 0, SEEK_SET);
1785         if (mxf->edit_unit_byte_count) {
1786             mxf_write_partition(s, 1, 2, header_closed_partition_key, 1);
1787             mxf_write_klv_fill(s);
1788             mxf_write_index_table_segment(s);
1789         } else {
1790             mxf_write_partition(s, 0, 0, header_closed_partition_key, 1);
1791         }
1792     }
1793
1794     put_flush_packet(pb);
1795
1796     ff_audio_interleave_close(s);
1797
1798     av_freep(&mxf->index_entries);
1799     av_freep(&mxf->body_partition_offset);
1800     av_freep(&mxf->timecode_track->priv_data);
1801     av_freep(&mxf->timecode_track);
1802
1803     mxf_free(s);
1804
1805     return 0;
1806 }
1807
1808 static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1809 {
1810     int i, stream_count = 0;
1811
1812     for (i = 0; i < s->nb_streams; i++)
1813         stream_count += !!s->streams[i]->last_in_packet_buffer;
1814
1815     if (stream_count && (s->nb_streams == stream_count || flush)) {
1816         AVPacketList *pktl = s->packet_buffer;
1817         if (s->nb_streams != stream_count) {
1818             AVPacketList *last = NULL;
1819             // find last packet in edit unit
1820             while (pktl) {
1821                 if (!stream_count || pktl->pkt.stream_index == 0)
1822                     break;
1823                 last = pktl;
1824                 pktl = pktl->next;
1825                 stream_count--;
1826             }
1827             // purge packet queue
1828             while (pktl) {
1829                 AVPacketList *next = pktl->next;
1830
1831                 if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)
1832                     s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;
1833                 av_free_packet(&pktl->pkt);
1834                 av_freep(&pktl);
1835                 pktl = next;
1836             }
1837             if (last)
1838                 last->next = NULL;
1839             else {
1840                 s->packet_buffer = NULL;
1841                 s->packet_buffer_end= NULL;
1842                 goto out;
1843             }
1844             pktl = s->packet_buffer;
1845         }
1846
1847         *out = pktl->pkt;
1848         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);
1849         s->packet_buffer = pktl->next;
1850         if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)
1851             s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;
1852         if(!s->packet_buffer)
1853             s->packet_buffer_end= NULL;
1854         av_freep(&pktl);
1855         return 1;
1856     } else {
1857     out:
1858         av_init_packet(out);
1859         return 0;
1860     }
1861 }
1862
1863 static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
1864 {
1865     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;
1866     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;
1867
1868     return next->dts > pkt->dts ||
1869         (next->dts == pkt->dts && sc->order < sc2->order);
1870 }
1871
1872 static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1873 {
1874     return ff_audio_rechunk_interleave(s, out, pkt, flush,
1875                                mxf_interleave_get_packet, mxf_compare_timestamps);
1876 }
1877
1878 AVOutputFormat mxf_muxer = {
1879     "mxf",
1880     NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1881     "application/mxf",
1882     "mxf",
1883     sizeof(MXFContext),
1884     CODEC_ID_PCM_S16LE,
1885     CODEC_ID_MPEG2VIDEO,
1886     mxf_write_header,
1887     mxf_write_packet,
1888     mxf_write_footer,
1889     AVFMT_NOTIMESTAMPS,
1890     NULL,
1891     mxf_interleave,
1892 };
1893
1894 AVOutputFormat mxf_d10_muxer = {
1895     "mxf_d10",
1896     NULL_IF_CONFIG_SMALL("Material eXchange Format, D-10 Mapping"),
1897     "application/mxf",
1898     NULL,
1899     sizeof(MXFContext),
1900     CODEC_ID_PCM_S16LE,
1901     CODEC_ID_MPEG2VIDEO,
1902     mxf_write_header,
1903     mxf_write_packet,
1904     mxf_write_footer,
1905     AVFMT_NOTIMESTAMPS,
1906     NULL,
1907     mxf_interleave,
1908 };