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/fifo.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 } MXFStreamContext;
  73
  74 typedef struct {
  75     UID container_ul;
  76     UID element_ul;
  77     UID codec_ul;
  78     void (*write_desc)();
  79 } MXFContainerEssenceEntry;
  80
  81 static const struct {
  82     enum CodecID id;
  83     int index;
  84 } mxf_essence_mappings[] = {
  85     { CODEC_ID_MPEG2VIDEO, 0 },
  86     { CODEC_ID_PCM_S24LE,  1 },
  87     { CODEC_ID_PCM_S16LE,  1 },
  88     { 0 }
  89 };
  90
  91 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st);
  92 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st);
  93 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st);
  94 static void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st);
  95 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st);
  96
  97 static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {
  98     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },
  99       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },
 100       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },
 101       mxf_write_mpegvideo_desc },
 102     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },
 103       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },
 104       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 105       mxf_write_aes3_desc },
 106     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },
 107       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },
 108       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 109       mxf_write_wav_desc },
 110     // D-10 625/50 PAL 50mb/s
 111     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },
 112       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 113       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 },
 114       mxf_write_cdci_desc },
 115     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },
 116       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 117       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 118       mxf_write_generic_sound_desc },
 119     // D-10 525/60 NTSC 50mb/s
 120     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },
 121       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 122       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x02 },
 123       mxf_write_cdci_desc },
 124     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },
 125       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 126       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 127       mxf_write_generic_sound_desc },
 128     // D-10 625/50 PAL 40mb/s
 129     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },
 130       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 131       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x03 },
 132       mxf_write_cdci_desc },
 133     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },
 134       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 135       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 136       mxf_write_generic_sound_desc },
 137     // D-10 525/60 NTSC 40mb/s
 138     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },
 139       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 140       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x04 },
 141       mxf_write_cdci_desc },
 142     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },
 143       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 144       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 145       mxf_write_generic_sound_desc },
 146     // D-10 625/50 PAL 30mb/s
 147     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },
 148       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 149       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 },
 150       mxf_write_cdci_desc },
 151     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },
 152       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 153       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 154       mxf_write_generic_sound_desc },
 155     // D-10 525/60 NTSC 30mb/s
 156     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },
 157       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 158       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x06 },
 159       mxf_write_cdci_desc },
 160     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },
 161       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 162       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 163       mxf_write_generic_sound_desc },
 164     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
 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       NULL },
 168 };
 169
 170 typedef struct MXFContext {
 171     int64_t footer_partition_offset;
 172     int essence_container_count;
 173     AVRational time_base;
 174     int header_written;
 175     MXFIndexEntry *index_entries;
 176     unsigned edit_units_count;
 177     uint64_t timestamp;   ///< timestamp, as year(16),month(8),day(8),hour(8),minutes(8),msec/4(8)
 178     uint8_t slice_count;  ///< index slice count minus 1 (1 if no audio, 0 otherwise)
 179     int last_indexed_edit_unit;
 180     uint64_t *body_partition_offset;
 181     unsigned body_partitions_count;
 182     int last_key_index;  ///< index of last key frame
 183     uint64_t duration;
 184     AVStream *timecode_track;
 185     int timecode_base;       ///< rounded time code base (25 or 30)
 186     int timecode_start;      ///< frame number computed from mpeg-2 gop header timecode
 187     int timecode_drop_frame; ///< time code use drop frame method frop mpeg-2 essence gop header
 188     int edit_unit_byte_count; ///< fixed edit unit byte count
 189     uint64_t body_offset;
 190 } MXFContext;
 191
 192 static const uint8_t uuid_base[]            = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };
 193 static const uint8_t umid_base[]            = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x01,0x0D,0x00,0x13,0x00,0x00,0x00 };
 194
 195 /**
 196  * complete key for operation pattern, partitions, and primer pack
 197  */
 198 static const uint8_t op1a_ul[]                     = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x09,0x00 };
 199 static const uint8_t footer_partition_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }; // ClosedComplete
 200 static const uint8_t primer_pack_key[]             = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x05,0x01,0x00 };
 201 static const uint8_t index_table_segment_key[]     = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 };
 202 static const uint8_t random_index_pack_key[]       = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
 203 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
 204 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
 205 static const uint8_t klv_fill_key[]                = { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x03,0x01,0x02,0x10,0x01,0x00,0x00,0x00 };
 206 static const uint8_t body_partition_key[]          = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }; // ClosedComplete
 207
 208 /**
 209  * partial key for header metadata
 210  */
 211 static const uint8_t header_metadata_key[]  = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01 };
 212 static const uint8_t multiple_desc_ul[]     = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x0D,0x01,0x03,0x01,0x02,0x7F,0x01,0x00 };
 213
 214 /**
 215  * SMPTE RP210 http://www.smpte-ra.org/mdd/index.html
 216  */
 217 static const MXFLocalTagPair mxf_local_tag_batch[] = {
 218     // preface set
 219     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */
 220     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */
 221     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */
 222     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */
 223     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */
 224     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */
 225     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */
 226     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */
 227     // Identification
 228     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */
 229     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */
 230     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */
 231     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */
 232     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */
 233     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */
 234     // Content Storage
 235     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */
 236     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */
 237     // Essence Container Data
 238     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */
 239     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */
 240     // Package
 241     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */
 242     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */
 243     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */
 244     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */
 245     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */
 246     // Track
 247     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */
 248     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */
 249     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */
 250     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */
 251     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */
 252     // Sequence
 253     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */
 254     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */
 255     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */
 256     // Source Clip
 257     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */
 258     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */
 259     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */
 260     // Timecode Component
 261     { 0x1501, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x05,0x00,0x00}}, /* Start Time Code */
 262     { 0x1502, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x04,0x01,0x01,0x02,0x06,0x00,0x00}}, /* Rounded Time Code Base */
 263     { 0x1503, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x04,0x01,0x01,0x05,0x00,0x00,0x00}}, /* Drop Frame */
 264     // File Descriptor
 265     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */
 266     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */
 267     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */
 268     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */
 269     // Generic Picture Essence Descriptor
 270     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */
 271     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */
 272     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */
 273     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */
 274     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */
 275     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */
 276     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */
 277     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */
 278     // CDCI Picture Essence Descriptor
 279     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */
 280     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */
 281     // Generic Sound Essence Descriptor
 282     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */
 283     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */
 284     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */
 285     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */
 286     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */
 287     // Index Table Segment
 288     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */
 289     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */
 290     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */
 291     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */
 292     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */
 293     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */
 294     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */
 295     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */
 296     // MPEG video Descriptor
 297     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */
 298     // Wave Audio Essence Descriptor
 299     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */
 300     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */
 301 };
 302
 303 static void mxf_write_uuid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
 304 {
 305     put_buffer(pb, uuid_base, 12);
 306     put_be16(pb, type);
 307     put_be16(pb, value);
 308 }
 309
 310 static void mxf_write_umid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
 311 {
 312     put_buffer(pb, umid_base, 16);
 313     mxf_write_uuid(pb, type, value);
 314 }
 315
 316 static void mxf_write_refs_count(ByteIOContext *pb, int ref_count)
 317 {
 318     put_be32(pb, ref_count);
 319     put_be32(pb, 16);
 320 }
 321
 322 static int klv_ber_length(uint64_t len)
 323 {
 324     if (len < 128)
 325         return 1;
 326     else
 327         return (av_log2(len) >> 3) + 2;
 328 }
 329
 330 static int klv_encode_ber_length(ByteIOContext *pb, uint64_t len)
 331 {
 332     // Determine the best BER size
 333     int size;
 334     if (len < 128) {
 335         //short form
 336         put_byte(pb, len);
 337         return 1;
 338     }
 339
 340     size = (av_log2(len) >> 3) + 1;
 341
 342     // long form
 343     put_byte(pb, 0x80 + size);
 344     while(size) {
 345         size--;
 346         put_byte(pb, len >> 8 * size & 0xff);
 347     }
 348     return 0;
 349 }
 350
 351 static void klv_encode_ber4_length(ByteIOContext *pb, int len)
 352 {
 353     put_byte(pb, 0x80 + 3);
 354     put_be24(pb, len);
 355 }
 356
 357 /*
 358  * Get essence container ul index
 359  */
 360 static int mxf_get_essence_container_ul_index(enum CodecID id)
 361 {
 362     int i;
 363     for (i = 0; mxf_essence_mappings[i].id; i++)
 364         if (mxf_essence_mappings[i].id == id)
 365             return mxf_essence_mappings[i].index;
 366     return -1;
 367 }
 368
 369 static void mxf_write_primer_pack(AVFormatContext *s)
 370 {
 371     ByteIOContext *pb = s->pb;
 372     int local_tag_number, i = 0;
 373
 374     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);
 375
 376     put_buffer(pb, primer_pack_key, 16);
 377     klv_encode_ber_length(pb, local_tag_number * 18 + 8);
 378
 379     put_be32(pb, local_tag_number); // local_tag num
 380     put_be32(pb, 18); // item size, always 18 according to the specs
 381
 382     for (i = 0; i < local_tag_number; i++) {
 383         put_be16(pb, mxf_local_tag_batch[i].local_tag);
 384         put_buffer(pb, mxf_local_tag_batch[i].uid, 16);
 385     }
 386 }
 387
 388 static void mxf_write_local_tag(ByteIOContext *pb, int size, int tag)
 389 {
 390     put_be16(pb, tag);
 391     put_be16(pb, size);
 392 }
 393
 394 static void mxf_write_metadata_key(ByteIOContext *pb, unsigned int value)
 395 {
 396     put_buffer(pb, header_metadata_key, 13);
 397     put_be24(pb, value);
 398 }
 399
 400 static void mxf_free(AVFormatContext *s)
 401 {
 402     int i;
 403
 404     for (i = 0; i < s->nb_streams; i++) {
 405         AVStream *st = s->streams[i];
 406         av_freep(&st->priv_data);
 407     }
 408 }
 409
 410 static const MXFCodecUL *mxf_get_data_definition_ul(int type)
 411 {
 412     const MXFCodecUL *uls = ff_mxf_data_definition_uls;
 413     while (uls->uid[0]) {
 414         if (type == uls->id)
 415             break;
 416         uls++;
 417     }
 418     return uls;
 419 }
 420
 421 static void mxf_write_essence_container_refs(AVFormatContext *s)
 422 {
 423     MXFContext *c = s->priv_data;
 424     ByteIOContext *pb = s->pb;
 425     int i;
 426
 427     mxf_write_refs_count(pb, c->essence_container_count);
 428     av_log(s,AV_LOG_DEBUG, "essence container count:%d\n", c->essence_container_count);
 429     for (i = 0; i < c->essence_container_count; i++) {
 430         MXFStreamContext *sc = s->streams[i]->priv_data;
 431         put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
 432     }
 433 }
 434
 435 static void mxf_write_preface(AVFormatContext *s)
 436 {
 437     MXFContext *mxf = s->priv_data;
 438     ByteIOContext *pb = s->pb;
 439
 440     mxf_write_metadata_key(pb, 0x012f00);
 441     PRINT_KEY(s, "preface key", pb->buf_ptr - 16);
 442     klv_encode_ber_length(pb, 130 + 16 * mxf->essence_container_count);
 443
 444     // write preface set uid
 445     mxf_write_local_tag(pb, 16, 0x3C0A);
 446     mxf_write_uuid(pb, Preface, 0);
 447     PRINT_KEY(s, "preface uid", pb->buf_ptr - 16);
 448
 449     // last modified date
 450     mxf_write_local_tag(pb, 8, 0x3B02);
 451     put_be64(pb, mxf->timestamp);
 452
 453     // write version
 454     mxf_write_local_tag(pb, 2, 0x3B05);
 455     put_be16(pb, 258); // v1.2
 456
 457     // write identification_refs
 458     mxf_write_local_tag(pb, 16 + 8, 0x3B06);
 459     mxf_write_refs_count(pb, 1);
 460     mxf_write_uuid(pb, Identification, 0);
 461
 462     // write content_storage_refs
 463     mxf_write_local_tag(pb, 16, 0x3B03);
 464     mxf_write_uuid(pb, ContentStorage, 0);
 465
 466     // operational pattern
 467     mxf_write_local_tag(pb, 16, 0x3B09);
 468     put_buffer(pb, op1a_ul, 16);
 469
 470     // write essence_container_refs
 471     mxf_write_local_tag(pb, 8 + 16 * mxf->essence_container_count, 0x3B0A);
 472     mxf_write_essence_container_refs(s);
 473
 474     // write dm_scheme_refs
 475     mxf_write_local_tag(pb, 8, 0x3B0B);
 476     put_be64(pb, 0);
 477 }
 478
 479 /*
 480  * Write a local tag containing an ascii string as utf-16
 481  */
 482 static void mxf_write_local_tag_utf16(ByteIOContext *pb, int tag, const char *value)
 483 {
 484     int i, size = strlen(value);
 485     mxf_write_local_tag(pb, size*2, tag);
 486     for (i = 0; i < size; i++)
 487         put_be16(pb, value[i]);
 488 }
 489
 490 static void mxf_write_identification(AVFormatContext *s)
 491 {
 492     MXFContext *mxf = s->priv_data;
 493     ByteIOContext *pb = s->pb;
 494     const char *company = "FFmpeg";
 495     const char *product = "OP1a Muxer";
 496     const char *version;
 497     int length;
 498
 499     mxf_write_metadata_key(pb, 0x013000);
 500     PRINT_KEY(s, "identification key", pb->buf_ptr - 16);
 501
 502     version = s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT ?
 503         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);
 504     length = 84 + (strlen(company)+strlen(product)+strlen(version))*2; // utf-16
 505     klv_encode_ber_length(pb, length);
 506
 507     // write uid
 508     mxf_write_local_tag(pb, 16, 0x3C0A);
 509     mxf_write_uuid(pb, Identification, 0);
 510     PRINT_KEY(s, "identification uid", pb->buf_ptr - 16);
 511
 512     // write generation uid
 513     mxf_write_local_tag(pb, 16, 0x3C09);
 514     mxf_write_uuid(pb, Identification, 1);
 515
 516     mxf_write_local_tag_utf16(pb, 0x3C01, company); // Company Name
 517     mxf_write_local_tag_utf16(pb, 0x3C02, product); // Product Name
 518     mxf_write_local_tag_utf16(pb, 0x3C04, version); // Version String
 519
 520     // write product uid
 521     mxf_write_local_tag(pb, 16, 0x3C05);
 522     mxf_write_uuid(pb, Identification, 2);
 523
 524     // modification date
 525     mxf_write_local_tag(pb, 8, 0x3C06);
 526     put_be64(pb, mxf->timestamp);
 527 }
 528
 529 static void mxf_write_content_storage(AVFormatContext *s)
 530 {
 531     ByteIOContext *pb = s->pb;
 532
 533     mxf_write_metadata_key(pb, 0x011800);
 534     PRINT_KEY(s, "content storage key", pb->buf_ptr - 16);
 535     klv_encode_ber_length(pb, 92);
 536
 537     // write uid
 538     mxf_write_local_tag(pb, 16, 0x3C0A);
 539     mxf_write_uuid(pb, ContentStorage, 0);
 540     PRINT_KEY(s, "content storage uid", pb->buf_ptr - 16);
 541
 542     // write package reference
 543     mxf_write_local_tag(pb, 16 * 2 + 8, 0x1901);
 544     mxf_write_refs_count(pb, 2);
 545     mxf_write_uuid(pb, MaterialPackage, 0);
 546     mxf_write_uuid(pb, SourcePackage, 0);
 547
 548     // write essence container data
 549     mxf_write_local_tag(pb, 8 + 16, 0x1902);
 550     mxf_write_refs_count(pb, 1);
 551     mxf_write_uuid(pb, EssenceContainerData, 0);
 552 }
 553
 554 static void mxf_write_track(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 555 {
 556     MXFContext *mxf = s->priv_data;
 557     ByteIOContext *pb = s->pb;
 558     MXFStreamContext *sc = st->priv_data;
 559
 560     mxf_write_metadata_key(pb, 0x013b00);
 561     PRINT_KEY(s, "track key", pb->buf_ptr - 16);
 562     klv_encode_ber_length(pb, 80);
 563
 564     // write track uid
 565     mxf_write_local_tag(pb, 16, 0x3C0A);
 566     mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, st->index);
 567     PRINT_KEY(s, "track uid", pb->buf_ptr - 16);
 568
 569     // write track id
 570     mxf_write_local_tag(pb, 4, 0x4801);
 571     put_be32(pb, st->index+2);
 572
 573     // write track number
 574     mxf_write_local_tag(pb, 4, 0x4804);
 575     if (type == MaterialPackage)
 576         put_be32(pb, 0); // track number of material package is 0
 577     else
 578         put_buffer(pb, sc->track_essence_element_key + 12, 4);
 579
 580     mxf_write_local_tag(pb, 8, 0x4B01);
 581     put_be32(pb, mxf->time_base.den);
 582     put_be32(pb, mxf->time_base.num);
 583
 584     // write origin
 585     mxf_write_local_tag(pb, 8, 0x4B02);
 586     put_be64(pb, 0);
 587
 588     // write sequence refs
 589     mxf_write_local_tag(pb, 16, 0x4803);
 590     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 591 }
 592
 593 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 };
 594
 595 static void mxf_write_common_fields(AVFormatContext *s, AVStream *st)
 596 {
 597     MXFContext *mxf = s->priv_data;
 598     ByteIOContext *pb = s->pb;
 599
 600     // find data define uls
 601     mxf_write_local_tag(pb, 16, 0x0201);
 602     if (st == mxf->timecode_track)
 603         put_buffer(pb, smpte_12m_timecode_track_data_ul, 16);
 604     else {
 605         const MXFCodecUL *data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);
 606         put_buffer(pb, data_def_ul->uid, 16);
 607     }
 608
 609     // write duration
 610     mxf_write_local_tag(pb, 8, 0x0202);
 611     put_be64(pb, mxf->duration);
 612 }
 613
 614 static void mxf_write_sequence(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 615 {
 616     MXFContext *mxf = s->priv_data;
 617     ByteIOContext *pb = s->pb;
 618     enum MXFMetadataSetType component;
 619
 620     mxf_write_metadata_key(pb, 0x010f00);
 621     PRINT_KEY(s, "sequence key", pb->buf_ptr - 16);
 622     klv_encode_ber_length(pb, 80);
 623
 624     mxf_write_local_tag(pb, 16, 0x3C0A);
 625     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 626
 627     PRINT_KEY(s, "sequence uid", pb->buf_ptr - 16);
 628     mxf_write_common_fields(s, st);
 629
 630     // write structural component
 631     mxf_write_local_tag(pb, 16 + 8, 0x1001);
 632     mxf_write_refs_count(pb, 1);
 633     if (st == mxf->timecode_track)
 634         component = TimecodeComponent;
 635     else
 636         component = SourceClip;
 637     if (type == SourcePackage)
 638         component += TypeBottom;
 639     mxf_write_uuid(pb, component, st->index);
 640 }
 641
 642 static void mxf_write_timecode_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 643 {
 644     MXFContext *mxf = s->priv_data;
 645     ByteIOContext *pb = s->pb;
 646
 647     mxf_write_metadata_key(pb, 0x011400);
 648     klv_encode_ber_length(pb, 75);
 649
 650     // UID
 651     mxf_write_local_tag(pb, 16, 0x3C0A);
 652     mxf_write_uuid(pb, type == MaterialPackage ? TimecodeComponent :
 653                    TimecodeComponent + TypeBottom, st->index);
 654
 655     mxf_write_common_fields(s, st);
 656
 657     // Start Time Code
 658     mxf_write_local_tag(pb, 8, 0x1501);
 659     put_be64(pb, mxf->timecode_start);
 660
 661     // Rounded Time Code Base
 662     mxf_write_local_tag(pb, 2, 0x1502);
 663     put_be16(pb, mxf->timecode_base);
 664
 665     // Drop Frame
 666     mxf_write_local_tag(pb, 1, 0x1503);
 667     put_byte(pb, mxf->timecode_drop_frame);
 668 }
 669
 670 static void mxf_write_structural_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 671 {
 672     ByteIOContext *pb = s->pb;
 673     int i;
 674
 675     mxf_write_metadata_key(pb, 0x011100);
 676     PRINT_KEY(s, "sturctural component key", pb->buf_ptr - 16);
 677     klv_encode_ber_length(pb, 108);
 678
 679     // write uid
 680     mxf_write_local_tag(pb, 16, 0x3C0A);
 681     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
 682
 683     PRINT_KEY(s, "structural component uid", pb->buf_ptr - 16);
 684     mxf_write_common_fields(s, st);
 685
 686     // write start_position
 687     mxf_write_local_tag(pb, 8, 0x1201);
 688     put_be64(pb, 0);
 689
 690     // write source package uid, end of the reference
 691     mxf_write_local_tag(pb, 32, 0x1101);
 692     if (type == SourcePackage) {
 693         for (i = 0; i < 4; i++)
 694             put_be64(pb, 0);
 695     } else
 696         mxf_write_umid(pb, SourcePackage, 0);
 697
 698     // write source track id
 699     mxf_write_local_tag(pb, 4, 0x1102);
 700     if (type == SourcePackage)
 701         put_be32(pb, 0);
 702     else
 703         put_be32(pb, st->index+2);
 704 }
 705
 706 static void mxf_write_multi_descriptor(AVFormatContext *s)
 707 {
 708     MXFContext *mxf = s->priv_data;
 709     ByteIOContext *pb = s->pb;
 710     const uint8_t *ul;
 711     int i;
 712
 713     mxf_write_metadata_key(pb, 0x014400);
 714     PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);
 715     klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);
 716
 717     mxf_write_local_tag(pb, 16, 0x3C0A);
 718     mxf_write_uuid(pb, MultipleDescriptor, 0);
 719     PRINT_KEY(s, "multi_desc uid", pb->buf_ptr - 16);
 720
 721     // write sample rate
 722     mxf_write_local_tag(pb, 8, 0x3001);
 723     put_be32(pb, mxf->time_base.den);
 724     put_be32(pb, mxf->time_base.num);
 725
 726     // write essence container ul
 727     mxf_write_local_tag(pb, 16, 0x3004);
 728     if (mxf->essence_container_count > 1)
 729         ul = multiple_desc_ul;
 730     else {
 731         MXFStreamContext *sc = s->streams[0]->priv_data;
 732         ul = mxf_essence_container_uls[sc->index].container_ul;
 733     }
 734     put_buffer(pb, ul, 16);
 735
 736     // write sub descriptor refs
 737     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x3F01);
 738     mxf_write_refs_count(pb, s->nb_streams);
 739     for (i = 0; i < s->nb_streams; i++)
 740         mxf_write_uuid(pb, SubDescriptor, i);
 741 }
 742
 743 static void mxf_write_generic_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 744 {
 745     MXFContext *mxf = s->priv_data;
 746     MXFStreamContext *sc = st->priv_data;
 747     ByteIOContext *pb = s->pb;
 748
 749     put_buffer(pb, key, 16);
 750     klv_encode_ber_length(pb, size+20+8+12+20);
 751
 752     mxf_write_local_tag(pb, 16, 0x3C0A);
 753     mxf_write_uuid(pb, SubDescriptor, st->index);
 754
 755     mxf_write_local_tag(pb, 4, 0x3006);
 756     put_be32(pb, st->index+2);
 757
 758     mxf_write_local_tag(pb, 8, 0x3001);
 759     put_be32(pb, mxf->time_base.den);
 760     put_be32(pb, mxf->time_base.num);
 761
 762     mxf_write_local_tag(pb, 16, 0x3004);
 763     put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
 764 }
 765
 766 static const UID mxf_mpegvideo_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 };
 767 static const UID mxf_wav_descriptor_key       = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 };
 768 static const UID mxf_aes3_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 };
 769 static const UID mxf_cdci_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x28,0x00 };
 770 static const UID mxf_generic_sound_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x42,0x00 };
 771
 772 static void mxf_write_cdci_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 773 {
 774     MXFStreamContext *sc = st->priv_data;
 775     ByteIOContext *pb = s->pb;
 776     int stored_height = (st->codec->height+15)/16*16;
 777     int display_height;
 778     int f1, f2;
 779
 780     mxf_write_generic_desc(s, st, key, size+8+8+8+8+8+8+5+16+sc->interlaced*4+12+20);
 781
 782     mxf_write_local_tag(pb, 4, 0x3203);
 783     put_be32(pb, st->codec->width);
 784
 785     mxf_write_local_tag(pb, 4, 0x3202);
 786     put_be32(pb, stored_height>>sc->interlaced);
 787
 788     mxf_write_local_tag(pb, 4, 0x3209);
 789     put_be32(pb, st->codec->width);
 790
 791     if (st->codec->height == 608) // PAL + VBI
 792         display_height = 576;
 793     else if (st->codec->height == 512)  // NTSC + VBI
 794         display_height = 486;
 795     else
 796         display_height = st->codec->height;
 797
 798     mxf_write_local_tag(pb, 4, 0x3208);
 799     put_be32(pb, display_height>>sc->interlaced);
 800
 801     // component depth
 802     mxf_write_local_tag(pb, 4, 0x3301);
 803     put_be32(pb, 8);
 804
 805     // horizontal subsampling
 806     mxf_write_local_tag(pb, 4, 0x3302);
 807     put_be32(pb, 2);
 808
 809     // frame layout
 810     mxf_write_local_tag(pb, 1, 0x320C);
 811     put_byte(pb, sc->interlaced);
 812
 813     // video line map
 814     switch (st->codec->height) {
 815     case  576: f1 = 23; f2 = 336; break;
 816     case  608: f1 =  7; f2 = 320; break;
 817     case  480: f1 = 20; f2 = 283; break;
 818     case  512: f1 =  7; f2 = 270; break;
 819     case  720: f1 = 26; f2 =   0; break; // progressive
 820     case 1080: f1 = 21; f2 = 584; break;
 821     default:   f1 =  0; f2 =   0; break;
 822     }
 823
 824     if (!sc->interlaced) {
 825         f2  = 0;
 826         f1 *= 2;
 827     }
 828
 829     mxf_write_local_tag(pb, 12+sc->interlaced*4, 0x320D);
 830     put_be32(pb, sc->interlaced ? 2 : 1);
 831     put_be32(pb, 4);
 832     put_be32(pb, f1);
 833     if (sc->interlaced)
 834         put_be32(pb, f2);
 835
 836     mxf_write_local_tag(pb, 8, 0x320E);
 837     put_be32(pb, sc->aspect_ratio.num);
 838     put_be32(pb, sc->aspect_ratio.den);
 839
 840     mxf_write_local_tag(pb, 16, 0x3201);
 841     put_buffer(pb, *sc->codec_ul, 16);
 842 }
 843
 844 static void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st)
 845 {
 846     mxf_write_cdci_common(s, st, mxf_cdci_descriptor_key, 0);
 847 }
 848
 849 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
 850 {
 851     ByteIOContext *pb = s->pb;
 852
 853     mxf_write_cdci_common(s, st, mxf_mpegvideo_descriptor_key, 8);
 854
 855     // bit rate
 856     mxf_write_local_tag(pb, 4, 0x8000);
 857     put_be32(pb, st->codec->bit_rate);
 858 }
 859
 860 static void mxf_write_generic_sound_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 861 {
 862     ByteIOContext *pb = s->pb;
 863
 864     mxf_write_generic_desc(s, st, key, size+5+12+8+8);
 865
 866     // audio locked
 867     mxf_write_local_tag(pb, 1, 0x3D02);
 868     put_byte(pb, 1);
 869
 870     // write audio sampling rate
 871     mxf_write_local_tag(pb, 8, 0x3D03);
 872     put_be32(pb, st->codec->sample_rate);
 873     put_be32(pb, 1);
 874
 875     mxf_write_local_tag(pb, 4, 0x3D07);
 876     put_be32(pb, st->codec->channels);
 877
 878     mxf_write_local_tag(pb, 4, 0x3D01);
 879     put_be32(pb, av_get_bits_per_sample(st->codec->codec_id));
 880 }
 881
 882 static void mxf_write_wav_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 883 {
 884     ByteIOContext *pb = s->pb;
 885
 886     mxf_write_generic_sound_common(s, st, key, size+6+8);
 887
 888     mxf_write_local_tag(pb, 2, 0x3D0A);
 889     put_be16(pb, st->codec->block_align);
 890
 891     // avg bytes per sec
 892     mxf_write_local_tag(pb, 4, 0x3D09);
 893     put_be32(pb, st->codec->block_align*st->codec->sample_rate);
 894 }
 895
 896 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)
 897 {
 898     mxf_write_wav_common(s, st, mxf_wav_descriptor_key, 0);
 899 }
 900
 901 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)
 902 {
 903     mxf_write_wav_common(s, st, mxf_aes3_descriptor_key, 0);
 904 }
 905
 906 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st)
 907 {
 908     mxf_write_generic_sound_common(s, st, mxf_generic_sound_descriptor_key, 0);
 909 }
 910
 911 static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)
 912 {
 913     MXFContext *mxf = s->priv_data;
 914     ByteIOContext *pb = s->pb;
 915     int i, track_count = s->nb_streams+1;
 916
 917     if (type == MaterialPackage) {
 918         mxf_write_metadata_key(pb, 0x013600);
 919         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);
 920         klv_encode_ber_length(pb, 92 + 16*track_count);
 921     } else {
 922         mxf_write_metadata_key(pb, 0x013700);
 923         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);
 924         klv_encode_ber_length(pb, 112 + 16*track_count); // 20 bytes length for descriptor reference
 925     }
 926
 927     // write uid
 928     mxf_write_local_tag(pb, 16, 0x3C0A);
 929     mxf_write_uuid(pb, type, 0);
 930     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);
 931     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);
 932
 933     // write package umid
 934     mxf_write_local_tag(pb, 32, 0x4401);
 935     mxf_write_umid(pb, type, 0);
 936     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);
 937
 938     // package creation date
 939     mxf_write_local_tag(pb, 8, 0x4405);
 940     put_be64(pb, mxf->timestamp);
 941
 942     // package modified date
 943     mxf_write_local_tag(pb, 8, 0x4404);
 944     put_be64(pb, mxf->timestamp);
 945
 946     // write track refs
 947     mxf_write_local_tag(pb, track_count*16 + 8, 0x4403);
 948     mxf_write_refs_count(pb, track_count);
 949     mxf_write_uuid(pb, type == MaterialPackage ? Track :
 950                    Track + TypeBottom, -1); // timecode track
 951     for (i = 0; i < s->nb_streams; i++)
 952         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);
 953
 954     // write multiple descriptor reference
 955     if (type == SourcePackage) {
 956         mxf_write_local_tag(pb, 16, 0x4701);
 957         if (s->nb_streams > 1) {
 958             mxf_write_uuid(pb, MultipleDescriptor, 0);
 959             mxf_write_multi_descriptor(s);
 960         } else
 961             mxf_write_uuid(pb, SubDescriptor, 0);
 962     }
 963
 964     // write timecode track
 965     mxf_write_track(s, mxf->timecode_track, type);
 966     mxf_write_sequence(s, mxf->timecode_track, type);
 967     mxf_write_timecode_component(s, mxf->timecode_track, type);
 968
 969     for (i = 0; i < s->nb_streams; i++) {
 970         AVStream *st = s->streams[i];
 971         mxf_write_track(s, st, type);
 972         mxf_write_sequence(s, st, type);
 973         mxf_write_structural_component(s, st, type);
 974
 975         if (type == SourcePackage) {
 976             MXFStreamContext *sc = st->priv_data;
 977             mxf_essence_container_uls[sc->index].write_desc(s, st);
 978         }
 979     }
 980 }
 981
 982 static int mxf_write_essence_container_data(AVFormatContext *s)
 983 {
 984     ByteIOContext *pb = s->pb;
 985
 986     mxf_write_metadata_key(pb, 0x012300);
 987     klv_encode_ber_length(pb, 72);
 988
 989     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID
 990     mxf_write_uuid(pb, EssenceContainerData, 0);
 991
 992     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID
 993     mxf_write_umid(pb, SourcePackage, 0);
 994
 995     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID
 996     put_be32(pb, 1);
 997
 998     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID
 999     put_be32(pb, 2);
1000
1001     return 0;
1002 }
1003
1004 static int mxf_write_header_metadata_sets(AVFormatContext *s)
1005 {
1006     mxf_write_preface(s);
1007     mxf_write_identification(s);
1008     mxf_write_content_storage(s);
1009     mxf_write_package(s, MaterialPackage);
1010     mxf_write_package(s, SourcePackage);
1011     mxf_write_essence_container_data(s);
1012     return 0;
1013 }
1014
1015 static unsigned klv_fill_size(uint64_t size)
1016 {
1017     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));
1018     if (pad < 20) // smallest fill item possible
1019         return pad + KAG_SIZE;
1020     else
1021         return pad & (KAG_SIZE-1);
1022 }
1023
1024 static void mxf_write_index_table_segment(AVFormatContext *s)
1025 {
1026     MXFContext *mxf = s->priv_data;
1027     ByteIOContext *pb = s->pb;
1028     int i, j;
1029     int temporal_reordering = 0;
1030     int key_index = mxf->last_key_index;
1031
1032     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);
1033
1034     if (!mxf->edit_units_count && !mxf->edit_unit_byte_count)
1035         return;
1036
1037     put_buffer(pb, index_table_segment_key, 16);
1038
1039     if (mxf->edit_unit_byte_count) {
1040         klv_encode_ber_length(pb, 80);
1041     } else {
1042         klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1)*6 +
1043                               12+mxf->edit_units_count*(11+mxf->slice_count*4));
1044     }
1045
1046     // instance id
1047     mxf_write_local_tag(pb, 16, 0x3C0A);
1048     mxf_write_uuid(pb, IndexTableSegment, 0);
1049
1050     // index edit rate
1051     mxf_write_local_tag(pb, 8, 0x3F0B);
1052     put_be32(pb, mxf->time_base.den);
1053     put_be32(pb, mxf->time_base.num);
1054
1055     // index start position
1056     mxf_write_local_tag(pb, 8, 0x3F0C);
1057     put_be64(pb, mxf->last_indexed_edit_unit);
1058
1059     // index duration
1060     mxf_write_local_tag(pb, 8, 0x3F0D);
1061     put_be64(pb, mxf->edit_units_count);
1062
1063     // edit unit byte count
1064     mxf_write_local_tag(pb, 4, 0x3F05);
1065     put_be32(pb, mxf->edit_unit_byte_count);
1066
1067     // index sid
1068     mxf_write_local_tag(pb, 4, 0x3F06);
1069     put_be32(pb, 2);
1070
1071     // body sid
1072     mxf_write_local_tag(pb, 4, 0x3F07);
1073     put_be32(pb, 1);
1074
1075     if (!mxf->edit_unit_byte_count) {
1076         // real slice count - 1
1077         mxf_write_local_tag(pb, 1, 0x3F08);
1078         put_byte(pb, mxf->slice_count);
1079
1080         // delta entry array
1081         mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);
1082         put_be32(pb, s->nb_streams+1); // num of entries
1083         put_be32(pb, 6);               // size of one entry
1084         // write system item delta entry
1085         put_byte(pb, 0);
1086         put_byte(pb, 0); // slice entry
1087         put_be32(pb, 0); // element delta
1088         for (i = 0; i < s->nb_streams; i++) {
1089             AVStream *st = s->streams[i];
1090             MXFStreamContext *sc = st->priv_data;
1091             put_byte(pb, sc->temporal_reordering);
1092             if (sc->temporal_reordering)
1093                 temporal_reordering = 1;
1094             if (i == 0) { // video track
1095                 put_byte(pb, 0); // slice number
1096                 put_be32(pb, KAG_SIZE); // system item size including klv fill
1097             } else { // audio track
1098                 unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;
1099                 audio_frame_size += klv_fill_size(audio_frame_size);
1100                 put_byte(pb, 1);
1101                 put_be32(pb, (i-1)*audio_frame_size); // element delta
1102             }
1103         }
1104
1105         mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);
1106         put_be32(pb, mxf->edit_units_count);  // num of entries
1107         put_be32(pb, 11+mxf->slice_count*4);  // size of one entry
1108         for (i = 0; i < mxf->edit_units_count; i++) {
1109             if (temporal_reordering) {
1110                 int temporal_offset = 0;
1111                 for (j = i+1; j < mxf->edit_units_count; j++) {
1112                     temporal_offset++;
1113                     if (mxf->index_entries[j].flags & 0x10) { // backward prediction
1114                         // next is not b, so is reordered
1115                         if (!(mxf->index_entries[i+1].flags & 0x10)) {
1116                             if ((mxf->index_entries[i].flags & 0x11) == 0) // i frame
1117                                 temporal_offset = 0;
1118                             else
1119                                 temporal_offset = -temporal_offset;
1120                         }
1121                         break;
1122                     }
1123                 }
1124                 put_byte(pb, temporal_offset);
1125             } else
1126                 put_byte(pb, 0);
1127             if (!(mxf->index_entries[i].flags & 0x33)) { // I frame
1128                 mxf->last_key_index = key_index;
1129                 key_index = i;
1130             }
1131             if (mxf->index_entries[i].flags & 0x10 && // backward prediction
1132                 !(mxf->index_entries[key_index].flags & 0x80)) { // open gop
1133                 put_byte(pb, mxf->last_key_index - i);
1134             } else {
1135                 put_byte(pb, key_index - i); // key frame offset
1136                 if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward
1137                     mxf->last_key_index = key_index;
1138             }
1139             put_byte(pb, mxf->index_entries[i].flags);
1140             // stream offset
1141             put_be64(pb, mxf->index_entries[i].offset);
1142             if (s->nb_streams > 1)
1143                 put_be32(pb, mxf->index_entries[i].slice_offset);
1144         }
1145
1146         mxf->last_key_index = key_index - mxf->edit_units_count;
1147         mxf->last_indexed_edit_unit += mxf->edit_units_count;
1148         mxf->edit_units_count = 0;
1149     }
1150 }
1151
1152 static void mxf_write_klv_fill(AVFormatContext *s)
1153 {
1154     unsigned pad = klv_fill_size(url_ftell(s->pb));
1155     if (pad) {
1156         put_buffer(s->pb, klv_fill_key, 16);
1157         pad -= 16 + 4;
1158         klv_encode_ber4_length(s->pb, pad);
1159         for (; pad; pad--)
1160             put_byte(s->pb, 0);
1161         assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));
1162     }
1163 }
1164
1165 static void mxf_write_partition(AVFormatContext *s, int bodysid,
1166                                 int indexsid,
1167                                 const uint8_t *key, int write_metadata)
1168 {
1169     MXFContext *mxf = s->priv_data;
1170     ByteIOContext *pb = s->pb;
1171     int64_t header_byte_count_offset;
1172     unsigned index_byte_count = 0;
1173     uint64_t partition_offset = url_ftell(pb);
1174
1175     if (!mxf->edit_unit_byte_count && mxf->edit_units_count)
1176         index_byte_count = 85 + 12+(s->nb_streams+1)*6 +
1177             12+mxf->edit_units_count*(11+mxf->slice_count*4);
1178     else if (mxf->edit_unit_byte_count && indexsid)
1179         index_byte_count = 80;
1180
1181     if (index_byte_count) {
1182         // add encoded ber length
1183         index_byte_count += 16 + klv_ber_length(index_byte_count);
1184         index_byte_count += klv_fill_size(index_byte_count);
1185     }
1186
1187     if (!memcmp(key, body_partition_key, 16)) {
1188         mxf->body_partition_offset =
1189             av_realloc(mxf->body_partition_offset,
1190                        (mxf->body_partitions_count+1)*
1191                        sizeof(*mxf->body_partition_offset));
1192         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;
1193     }
1194
1195     // write klv
1196     put_buffer(pb, key, 16);
1197     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);
1198
1199     // write partition value
1200     put_be16(pb, 1); // majorVersion
1201     put_be16(pb, 2); // minorVersion
1202     put_be32(pb, KAG_SIZE); // KAGSize
1203
1204     put_be64(pb, partition_offset); // ThisPartition
1205
1206     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)
1207         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition
1208     else if (!memcmp(key, footer_partition_key, 16) && mxf->body_partitions_count)
1209         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition
1210     else
1211         put_be64(pb, 0);
1212
1213     put_be64(pb, mxf->footer_partition_offset); // footerPartition
1214
1215     // set offset
1216     header_byte_count_offset = url_ftell(pb);
1217     put_be64(pb, 0); // headerByteCount, update later
1218
1219     // indexTable
1220     put_be64(pb, index_byte_count); // indexByteCount
1221     put_be32(pb, index_byte_count ? indexsid : 0); // indexSID
1222
1223     // BodyOffset
1224     if (bodysid && mxf->edit_units_count && mxf->body_partitions_count) {
1225         put_be64(pb, mxf->body_offset);
1226     } else
1227         put_be64(pb, 0);
1228
1229     put_be32(pb, bodysid); // bodySID
1230
1231     // operational pattern
1232     put_buffer(pb, op1a_ul, 16);
1233
1234     // essence container
1235     mxf_write_essence_container_refs(s);
1236
1237     if (write_metadata) {
1238         // mark the start of the headermetadata and calculate metadata size
1239         int64_t pos, start;
1240         unsigned header_byte_count;
1241
1242         mxf_write_klv_fill(s);
1243         start = url_ftell(s->pb);
1244         mxf_write_primer_pack(s);
1245         mxf_write_header_metadata_sets(s);
1246         pos = url_ftell(s->pb);
1247         header_byte_count = pos - start + klv_fill_size(pos);
1248
1249         // update header_byte_count
1250         url_fseek(pb, header_byte_count_offset, SEEK_SET);
1251         put_be64(pb, header_byte_count);
1252         url_fseek(pb, pos, SEEK_SET);
1253     }
1254
1255     put_flush_packet(pb);
1256 }
1257
1258 static const UID mxf_mpeg2_codec_uls[] = {
1259     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame
1260     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP
1261     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame
1262     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP
1263     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame
1264     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP
1265     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame
1266     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP
1267 };
1268
1269 static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)
1270 {
1271     if (avctx->profile == 4) { // Main
1272         if (avctx->level == 8) // Main
1273             return avctx->gop_size ?
1274                 &mxf_mpeg2_codec_uls[1] :
1275                 &mxf_mpeg2_codec_uls[0];
1276         else if (avctx->level == 4) // High
1277             return avctx->gop_size ?
1278                 &mxf_mpeg2_codec_uls[5] :
1279                 &mxf_mpeg2_codec_uls[4];
1280     } else if (avctx->profile == 0) { // 422
1281         if (avctx->level == 5) // Main
1282             return avctx->gop_size ?
1283                 &mxf_mpeg2_codec_uls[3] :
1284                 &mxf_mpeg2_codec_uls[2];
1285         else if (avctx->level == 2) // High
1286             return avctx->gop_size ?
1287                 &mxf_mpeg2_codec_uls[7] :
1288                 &mxf_mpeg2_codec_uls[6];
1289     }
1290     return NULL;
1291 }
1292
1293 static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt, int *flags)
1294 {
1295     MXFStreamContext *sc = st->priv_data;
1296     MXFContext *mxf = s->priv_data;
1297     uint32_t c = -1;
1298     int i;
1299
1300     *flags = 0;
1301
1302     for(i = 0; i < pkt->size - 4; i++) {
1303         c = (c<<8) + pkt->data[i];
1304         if (c == 0x1B5) {
1305             if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
1306                 st->codec->profile = pkt->data[i+1] & 0x07;
1307                 st->codec->level   = pkt->data[i+2] >> 4;
1308             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext
1309                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame
1310                 break;
1311             }
1312         } else if (c == 0x1b8) { // gop
1313             if (i + 4 < pkt->size) {
1314                 if (pkt->data[i+4]>>6 & 0x01) // closed
1315                     *flags |= 0x80; // random access
1316                 if (!mxf->header_written) {
1317                     unsigned hours   =  (pkt->data[i+1]>>2) & 0x1f;
1318                     unsigned minutes = ((pkt->data[i+1] & 0x03) << 4) | (pkt->data[i+2]>>4);
1319                     unsigned seconds = ((pkt->data[i+2] & 0x07) << 3) | (pkt->data[i+3]>>5);
1320                     unsigned frames  = ((pkt->data[i+3] & 0x1f) << 1) | (pkt->data[i+4]>>7);
1321                     mxf->timecode_drop_frame = !!(pkt->data[i+1] & 0x80);
1322                     mxf->timecode_start = (hours*3600 + minutes*60 + seconds) *
1323                         mxf->timecode_base + frames;
1324                     if (mxf->timecode_drop_frame) {
1325                         unsigned tminutes = 60 * hours + minutes;
1326                         mxf->timecode_start -= 2 * (tminutes - tminutes / 10);
1327                     }
1328                     av_log(s, AV_LOG_DEBUG, "frame %d %d:%d:%d%c%d\n", mxf->timecode_start,
1329                            hours, minutes, seconds, mxf->timecode_drop_frame ? ';':':', frames);
1330                 }
1331             }
1332         } else if (c == 0x1b3) { // seq
1333             *flags |= 0x40;
1334             if (i + 4 < pkt->size) {
1335                 switch ((pkt->data[i+4]>>4) & 0xf) {
1336                 case 2:  sc->aspect_ratio = (AVRational){  4,  3}; break;
1337                 case 3:  sc->aspect_ratio = (AVRational){ 16,  9}; break;
1338                 case 4:  sc->aspect_ratio = (AVRational){221,100}; break;
1339                 default:
1340                     av_reduce(&sc->aspect_ratio.num, &sc->aspect_ratio.den,
1341                               st->codec->width, st->codec->height, 1024*1024);
1342                 }
1343             }
1344         } else if (c == 0x100) { // pic
1345             int pict_type = (pkt->data[i+2]>>3) & 0x07;
1346             if (pict_type == 2) { // P frame
1347                 *flags |= 0x22;
1348                 st->codec->gop_size = 1;
1349             } else if (pict_type == 3) { // B frame
1350                 *flags |= 0x33;
1351                 sc->temporal_reordering = -1;
1352             } else if (!pict_type) {
1353                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");
1354                 return 0;
1355             }
1356         }
1357     }
1358     if (s->oformat != &mxf_d10_muxer)
1359         sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);
1360     return !!sc->codec_ul;
1361 }
1362
1363 static uint64_t mxf_parse_timestamp(time_t timestamp)
1364 {
1365     struct tm *time = localtime(&timestamp);
1366     return (uint64_t)(time->tm_year+1900) << 48 |
1367            (uint64_t)(time->tm_mon+1)     << 40 |
1368            (uint64_t) time->tm_mday       << 32 |
1369                       time->tm_hour       << 24 |
1370                       time->tm_min        << 16 |
1371                       time->tm_sec        << 8;
1372 }
1373
1374 static int mxf_write_header(AVFormatContext *s)
1375 {
1376     MXFContext *mxf = s->priv_data;
1377     int i;
1378     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};
1379     const int *samples_per_frame = NULL;
1380
1381     for (i = 0; i < s->nb_streams; i++) {
1382         AVStream *st = s->streams[i];
1383         MXFStreamContext *sc = av_mallocz(sizeof(*sc));
1384         if (!sc)
1385             return AVERROR(ENOMEM);
1386         st->priv_data = sc;
1387
1388         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
1389             if (i != 0) {
1390                 av_log(s, AV_LOG_ERROR, "video stream must be first track\n");
1391                 return -1;
1392             }
1393             if (fabs(av_q2d(st->codec->time_base) - 1/25.0) < 0.0001) {
1394                 samples_per_frame = PAL_samples_per_frame;
1395                 mxf->time_base = (AVRational){ 1, 25 };
1396                 mxf->timecode_base = 25;
1397             } else if (fabs(av_q2d(st->codec->time_base) - 1001/30000.0) < 0.0001) {
1398                 samples_per_frame = NTSC_samples_per_frame;
1399                 mxf->time_base = (AVRational){ 1001, 30000 };
1400                 mxf->timecode_base = 30;
1401             } else {
1402                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");
1403                 return -1;
1404             }
1405             av_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);
1406             if (s->oformat == &mxf_d10_muxer) {
1407                 if (st->codec->bit_rate == 50000000)
1408                     if (mxf->time_base.den == 25) sc->index = 3;
1409                     else                          sc->index = 5;
1410                 else if (st->codec->bit_rate == 40000000)
1411                     if (mxf->time_base.den == 25) sc->index = 7;
1412                     else                          sc->index = 9;
1413                 else if (st->codec->bit_rate == 30000000)
1414                     if (mxf->time_base.den == 25) sc->index = 11;
1415                     else                          sc->index = 13;
1416                 else {
1417                     av_log(s, AV_LOG_ERROR, "error MXF D-10 only support 30/40/50 mbit/s\n");
1418                     return -1;
1419                 }
1420
1421                 mxf->edit_unit_byte_count = KAG_SIZE; // system element
1422                 mxf->edit_unit_byte_count += 16 + 4 + (uint64_t)st->codec->bit_rate *
1423                     mxf->time_base.num / (8*mxf->time_base.den);
1424                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);
1425                 mxf->edit_unit_byte_count += 16 + 4 + 4 + samples_per_frame[0]*8*4;
1426                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);
1427             }
1428         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1429             if (st->codec->sample_rate != 48000) {
1430                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");
1431                 return -1;
1432             }
1433             av_set_pts_info(st, 64, 1, st->codec->sample_rate);
1434             if (s->oformat == &mxf_d10_muxer) {
1435                 if (st->index != 1) {
1436                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support one audio track\n");
1437                     return -1;
1438                 }
1439                 if (st->codec->codec_id != CODEC_ID_PCM_S16LE &&
1440                     st->codec->codec_id != CODEC_ID_PCM_S24LE) {
1441                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support 16 or 24 bits le audio\n");
1442                 }
1443                 sc->index = ((MXFStreamContext*)s->streams[0]->priv_data)->index + 1;
1444             } else
1445             mxf->slice_count = 1;
1446         }
1447
1448         if (!sc->index) {
1449             sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);
1450             if (sc->index == -1) {
1451                 av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "
1452                        "codec not currently supported in container\n", i);
1453                 return -1;
1454             }
1455         }
1456
1457         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;
1458
1459         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);
1460         sc->track_essence_element_key[15] = present[sc->index];
1461         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);
1462
1463         if (!present[sc->index])
1464             mxf->essence_container_count++;
1465         present[sc->index]++;
1466     }
1467
1468     if (s->oformat == &mxf_d10_muxer) {
1469         mxf->essence_container_count = 1;
1470     }
1471
1472     for (i = 0; i < s->nb_streams; i++) {
1473         MXFStreamContext *sc = s->streams[i]->priv_data;
1474         // update element count
1475         sc->track_essence_element_key[13] = present[sc->index];
1476         sc->order = AV_RB32(sc->track_essence_element_key+12);
1477     }
1478
1479     mxf->timestamp = mxf_parse_timestamp(s->timestamp);
1480     mxf->duration = -1;
1481
1482     mxf->timecode_track = av_mallocz(sizeof(*mxf->timecode_track));
1483     if (!mxf->timecode_track)
1484         return AVERROR(ENOMEM);
1485     mxf->timecode_track->priv_data = av_mallocz(sizeof(MXFStreamContext));
1486     if (!mxf->timecode_track->priv_data)
1487         return AVERROR(ENOMEM);
1488     mxf->timecode_track->index = -1;
1489
1490     if (!samples_per_frame)
1491         samples_per_frame = PAL_samples_per_frame;
1492
1493     if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)
1494         return -1;
1495
1496     return 0;
1497 }
1498
1499 static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };
1500 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 };
1501
1502 static uint32_t ff_framenum_to_12m_time_code(unsigned frame, int drop, int fps)
1503 {
1504     return (0                                    << 31) | // color frame flag
1505            (0                                    << 30) | // drop  frame flag
1506            ( ((frame % fps) / 10)                << 28) | // tens  of frames
1507            ( ((frame % fps) % 10)                << 24) | // units of frames
1508            (0                                    << 23) | // field phase (NTSC), b0 (PAL)
1509            ((((frame / fps) % 60) / 10)          << 20) | // tens  of seconds
1510            ((((frame / fps) % 60) % 10)          << 16) | // units of seconds
1511            (0                                    << 15) | // b0 (NTSC), b2 (PAL)
1512            ((((frame / (fps * 60)) % 60) / 10)   << 12) | // tens  of minutes
1513            ((((frame / (fps * 60)) % 60) % 10)   <<  8) | // units of minutes
1514            (0                                    <<  7) | // b1
1515            (0                                    <<  6) | // b2 (NSC), field phase (PAL)
1516            ((((frame / (fps * 3600) % 24)) / 10) <<  4) | // tens  of hours
1517            (  (frame / (fps * 3600) % 24)) % 10;          // units of hours
1518 }
1519
1520 static void mxf_write_system_item(AVFormatContext *s)
1521 {
1522     MXFContext *mxf = s->priv_data;
1523     ByteIOContext *pb = s->pb;
1524     unsigned frame;
1525     uint32_t time_code;
1526
1527     frame = mxf->timecode_start + mxf->last_indexed_edit_unit + mxf->edit_units_count;
1528
1529     // write system metadata pack
1530     put_buffer(pb, system_metadata_pack_key, 16);
1531     klv_encode_ber4_length(pb, 57);
1532     put_byte(pb, 0x5c); // UL, user date/time stamp, picture and sound item present
1533     put_byte(pb, 0x04); // content package rate
1534     put_byte(pb, 0x00); // content package type
1535     put_be16(pb, 0x00); // channel handle
1536     put_be16(pb, frame); // continuity count
1537     if (mxf->essence_container_count > 1)
1538         put_buffer(pb, multiple_desc_ul, 16);
1539     else {
1540         MXFStreamContext *sc = s->streams[0]->priv_data;
1541         put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
1542     }
1543     put_byte(pb, 0);
1544     put_be64(pb, 0);
1545     put_be64(pb, 0); // creation date/time stamp
1546
1547     put_byte(pb, 0x81); // SMPTE 12M time code
1548     time_code = ff_framenum_to_12m_time_code(frame, mxf->timecode_drop_frame, mxf->timecode_base);
1549     put_be32(pb, time_code);
1550     put_be32(pb, 0); // binary group data
1551     put_be64(pb, 0);
1552
1553     // write system metadata package set
1554     put_buffer(pb, system_metadata_package_set_key, 16);
1555     klv_encode_ber4_length(pb, 35);
1556     put_byte(pb, 0x83); // UMID
1557     put_be16(pb, 0x20);
1558     mxf_write_umid(pb, SourcePackage, 0);
1559 }
1560
1561 static void mxf_write_d10_video_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
1562 {
1563     MXFContext *mxf = s->priv_data;
1564     ByteIOContext *pb = s->pb;
1565     int packet_size = (uint64_t)st->codec->bit_rate*mxf->time_base.num /
1566         (8*mxf->time_base.den); // frame size
1567     int pad;
1568
1569     packet_size += 16 + 4;
1570     packet_size += klv_fill_size(packet_size);
1571
1572     klv_encode_ber4_length(pb, pkt->size);
1573     put_buffer(pb, pkt->data, pkt->size);
1574
1575     // ensure CBR muxing by padding to correct video frame size
1576     pad = packet_size - pkt->size - 16 - 4;
1577     if (pad > 20) {
1578         put_buffer(s->pb, klv_fill_key, 16);
1579         pad -= 16 + 4;
1580         klv_encode_ber4_length(s->pb, pad);
1581         for (; pad; pad--)
1582             put_byte(s->pb, 0);
1583         assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));
1584     } else {
1585         av_log(s, AV_LOG_WARNING, "cannot fill d-10 video packet\n");
1586         for (; pad > 0; pad--)
1587             put_byte(s->pb, 0);
1588     }
1589 }
1590
1591 static void mxf_write_d10_audio_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
1592 {
1593     MXFContext *mxf = s->priv_data;
1594     ByteIOContext *pb = s->pb;
1595     int frame_size = pkt->size / st->codec->block_align;
1596     uint8_t *samples = pkt->data;
1597     uint8_t *end = pkt->data + pkt->size;
1598     int i;
1599
1600     klv_encode_ber4_length(pb, 4 + frame_size*4*8);
1601
1602     put_byte(pb, (frame_size == 1920 ? 0 : (mxf->edit_units_count-1) % 5 + 1));
1603     put_le16(pb, frame_size);
1604     put_byte(pb, (1<<st->codec->channels)-1);
1605
1606     while (samples < end) {
1607         for (i = 0; i < st->codec->channels; i++) {
1608             uint32_t sample;
1609             if (st->codec->codec_id == CODEC_ID_PCM_S24LE) {
1610                 sample = AV_RL24(samples)<< 4;
1611                 samples += 3;
1612             } else {
1613                 sample = AV_RL16(samples)<<12;
1614                 samples += 2;
1615             }
1616             put_le32(pb, sample | i);
1617         }
1618         for (; i < 8; i++)
1619             put_le32(pb, i);
1620     }
1621 }
1622
1623 static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
1624 {
1625     MXFContext *mxf = s->priv_data;
1626     ByteIOContext *pb = s->pb;
1627     AVStream *st = s->streams[pkt->stream_index];
1628     MXFStreamContext *sc = st->priv_data;
1629     int flags = 0;
1630
1631     if (!mxf->edit_unit_byte_count && !(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {
1632         mxf->index_entries = av_realloc(mxf->index_entries,
1633             (mxf->edit_units_count + EDIT_UNITS_PER_BODY)*sizeof(*mxf->index_entries));
1634         if (!mxf->index_entries) {
1635             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");
1636             return -1;
1637         }
1638     }
1639
1640     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
1641         if (!mxf_parse_mpeg2_frame(s, st, pkt, &flags)) {
1642             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
1643             return -1;
1644         }
1645     }
1646
1647     if (!mxf->header_written) {
1648         if (mxf->edit_unit_byte_count) {
1649             mxf_write_partition(s, 1, 2, header_open_partition_key, 1);
1650             mxf_write_klv_fill(s);
1651             mxf_write_index_table_segment(s);
1652         } else {
1653             mxf_write_partition(s, 0, 0, header_open_partition_key, 1);
1654         }
1655         mxf->header_written = 1;
1656     }
1657
1658     if (st->index == 0) {
1659         if (!mxf->edit_unit_byte_count &&
1660             (!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&
1661             !(flags & 0x33)) { // I frame, Gop start
1662             mxf_write_klv_fill(s);
1663             mxf_write_partition(s, 1, 2, body_partition_key, 0);
1664
1665             mxf_write_klv_fill(s);
1666             mxf_write_index_table_segment(s);
1667         }
1668
1669         mxf_write_klv_fill(s);
1670         mxf_write_system_item(s);
1671
1672         if (!mxf->edit_unit_byte_count) {
1673             mxf->index_entries[mxf->edit_units_count].offset = mxf->body_offset;
1674             mxf->index_entries[mxf->edit_units_count].flags = flags;
1675             mxf->body_offset += KAG_SIZE; // size of system element
1676         }
1677         mxf->edit_units_count++;
1678     } else if (!mxf->edit_unit_byte_count && st->index == 1) {
1679         mxf->index_entries[mxf->edit_units_count-1].slice_offset =
1680             mxf->body_offset - mxf->index_entries[mxf->edit_units_count-1].offset;
1681     }
1682
1683     mxf_write_klv_fill(s);
1684     put_buffer(pb, sc->track_essence_element_key, 16); // write key
1685     if (s->oformat == &mxf_d10_muxer) {
1686         if (st->codec->codec_type == CODEC_TYPE_VIDEO)
1687             mxf_write_d10_video_packet(s, st, pkt);
1688         else
1689             mxf_write_d10_audio_packet(s, st, pkt);
1690     } else {
1691         klv_encode_ber4_length(pb, pkt->size); // write length
1692         put_buffer(pb, pkt->data, pkt->size);
1693         mxf->body_offset += 16+4+pkt->size + klv_fill_size(16+4+pkt->size);
1694     }
1695
1696     put_flush_packet(pb);
1697
1698     return 0;
1699 }
1700
1701 static void mxf_write_random_index_pack(AVFormatContext *s)
1702 {
1703     MXFContext *mxf = s->priv_data;
1704     ByteIOContext *pb = s->pb;
1705     uint64_t pos = url_ftell(pb);
1706     int i;
1707
1708     put_buffer(pb, random_index_pack_key, 16);
1709     klv_encode_ber_length(pb, 28 + 12*mxf->body_partitions_count);
1710
1711     if (mxf->edit_unit_byte_count)
1712         put_be32(pb, 1); // BodySID of header partition
1713     else
1714         put_be32(pb, 0);
1715     put_be64(pb, 0); // offset of header partition
1716
1717     for (i = 0; i < mxf->body_partitions_count; i++) {
1718         put_be32(pb, 1); // BodySID
1719         put_be64(pb, mxf->body_partition_offset[i]);
1720     }
1721
1722     put_be32(pb, 0); // BodySID of footer partition
1723     put_be64(pb, mxf->footer_partition_offset);
1724
1725     put_be32(pb, url_ftell(pb) - pos + 4);
1726 }
1727
1728 static int mxf_write_footer(AVFormatContext *s)
1729 {
1730     MXFContext *mxf = s->priv_data;
1731     ByteIOContext *pb = s->pb;
1732
1733     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;
1734
1735     mxf_write_klv_fill(s);
1736     mxf->footer_partition_offset = url_ftell(pb);
1737     if (mxf->edit_unit_byte_count) { // no need to repeat index
1738         mxf_write_partition(s, 0, 0, footer_partition_key, 0);
1739     } else {
1740         mxf_write_partition(s, 0, 2, footer_partition_key, 0);
1741
1742         mxf_write_klv_fill(s);
1743         mxf_write_index_table_segment(s);
1744     }
1745
1746     mxf_write_klv_fill(s);
1747     mxf_write_random_index_pack(s);
1748
1749     if (!url_is_streamed(s->pb)) {
1750         url_fseek(pb, 0, SEEK_SET);
1751         if (mxf->edit_unit_byte_count) {
1752             mxf_write_partition(s, 1, 2, header_closed_partition_key, 1);
1753             mxf_write_klv_fill(s);
1754             mxf_write_index_table_segment(s);
1755         } else {
1756             mxf_write_partition(s, 0, 0, header_closed_partition_key, 1);
1757         }
1758     }
1759
1760     put_flush_packet(pb);
1761
1762     ff_audio_interleave_close(s);
1763
1764     av_freep(&mxf->index_entries);
1765     av_freep(&mxf->body_partition_offset);
1766     av_freep(&mxf->timecode_track->priv_data);
1767     av_freep(&mxf->timecode_track);
1768
1769     mxf_free(s);
1770
1771     return 0;
1772 }
1773
1774 static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1775 {
1776     AVPacketList *pktl;
1777     int stream_count = 0;
1778     int streams[MAX_STREAMS];
1779
1780     memset(streams, 0, sizeof(streams));
1781     pktl = s->packet_buffer;
1782     while (pktl) {
1783         //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);
1784         if (!streams[pktl->pkt.stream_index])
1785             stream_count++;
1786         streams[pktl->pkt.stream_index]++;
1787         pktl = pktl->next;
1788     }
1789
1790     if (stream_count && (s->nb_streams == stream_count || flush)) {
1791         pktl = s->packet_buffer;
1792         if (s->nb_streams != stream_count) {
1793             AVPacketList *last = NULL;
1794             // find last packet in edit unit
1795             while (pktl) {
1796                 if (!stream_count || pktl->pkt.stream_index == 0)
1797                     break;
1798                 last = pktl;
1799                 pktl = pktl->next;
1800                 stream_count--;
1801             }
1802             // purge packet queue
1803             while (pktl) {
1804                 AVPacketList *next = pktl->next;
1805                 av_free_packet(&pktl->pkt);
1806                 av_freep(&pktl);
1807                 pktl = next;
1808             }
1809             if (last)
1810                 last->next = NULL;
1811             else {
1812                 s->packet_buffer = NULL;
1813                 goto out;
1814             }
1815             pktl = s->packet_buffer;
1816         }
1817
1818         *out = pktl->pkt;
1819         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);
1820         s->packet_buffer = pktl->next;
1821         av_freep(&pktl);
1822         return 1;
1823     } else {
1824     out:
1825         av_init_packet(out);
1826         return 0;
1827     }
1828 }
1829
1830 static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
1831 {
1832     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;
1833     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;
1834
1835     return next->dts > pkt->dts ||
1836         (next->dts == pkt->dts && sc->order < sc2->order);
1837 }
1838
1839 static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1840 {
1841     return ff_audio_rechunk_interleave(s, out, pkt, flush,
1842                                mxf_interleave_get_packet, mxf_compare_timestamps);
1843 }
1844
1845 AVOutputFormat mxf_muxer = {
1846     "mxf",
1847     NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1848     "application/mxf",
1849     "mxf",
1850     sizeof(MXFContext),
1851     CODEC_ID_PCM_S16LE,
1852     CODEC_ID_MPEG2VIDEO,
1853     mxf_write_header,
1854     mxf_write_packet,
1855     mxf_write_footer,
1856     AVFMT_NOTIMESTAMPS,
1857     NULL,
1858     mxf_interleave,
1859 };
1860
1861 AVOutputFormat mxf_d10_muxer = {
1862     "mxf_d10",
1863     NULL_IF_CONFIG_SMALL("Material eXchange Format, D-10 Mapping"),
1864     "application/mxf",
1865     NULL,
1866     sizeof(MXFContext),
1867     CODEC_ID_PCM_S16LE,
1868     CODEC_ID_MPEG2VIDEO,
1869     mxf_write_header,
1870     mxf_write_packet,
1871     mxf_write_footer,
1872     AVFMT_NOTIMESTAMPS,
1873     NULL,
1874     mxf_interleave,
1875 };