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,0x01,0x02,0x01,0x01,0x01,0x01,0x00 };
 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, 1);
 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     if (s->nb_streams > 1) {
 469         put_buffer(pb, op1a_ul, 14);
 470         put_be16(pb, 0x0900); // multi track
 471     } else {
 472         put_buffer(pb, op1a_ul, 16);
 473     }
 474
 475     // write essence_container_refs
 476     mxf_write_local_tag(pb, 8 + 16 * mxf->essence_container_count, 0x3B0A);
 477     mxf_write_essence_container_refs(s);
 478
 479     // write dm_scheme_refs
 480     mxf_write_local_tag(pb, 8, 0x3B0B);
 481     put_be64(pb, 0);
 482 }
 483
 484 /*
 485  * Write a local tag containing an ascii string as utf-16
 486  */
 487 static void mxf_write_local_tag_utf16(ByteIOContext *pb, int tag, const char *value)
 488 {
 489     int i, size = strlen(value);
 490     mxf_write_local_tag(pb, size*2, tag);
 491     for (i = 0; i < size; i++)
 492         put_be16(pb, value[i]);
 493 }
 494
 495 static void mxf_write_identification(AVFormatContext *s)
 496 {
 497     MXFContext *mxf = s->priv_data;
 498     ByteIOContext *pb = s->pb;
 499     const char *company = "FFmpeg";
 500     const char *product = "OP1a Muxer";
 501     const char *version;
 502     int length;
 503
 504     mxf_write_metadata_key(pb, 0x013000);
 505     PRINT_KEY(s, "identification key", pb->buf_ptr - 16);
 506
 507     version = s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT ?
 508         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);
 509     length = 84 + (strlen(company)+strlen(product)+strlen(version))*2; // utf-16
 510     klv_encode_ber_length(pb, length);
 511
 512     // write uid
 513     mxf_write_local_tag(pb, 16, 0x3C0A);
 514     mxf_write_uuid(pb, Identification, 0);
 515     PRINT_KEY(s, "identification uid", pb->buf_ptr - 16);
 516
 517     // write generation uid
 518     mxf_write_local_tag(pb, 16, 0x3C09);
 519     mxf_write_uuid(pb, Identification, 1);
 520
 521     mxf_write_local_tag_utf16(pb, 0x3C01, company); // Company Name
 522     mxf_write_local_tag_utf16(pb, 0x3C02, product); // Product Name
 523     mxf_write_local_tag_utf16(pb, 0x3C04, version); // Version String
 524
 525     // write product uid
 526     mxf_write_local_tag(pb, 16, 0x3C05);
 527     mxf_write_uuid(pb, Identification, 2);
 528
 529     // modification date
 530     mxf_write_local_tag(pb, 8, 0x3C06);
 531     put_be64(pb, mxf->timestamp);
 532 }
 533
 534 static void mxf_write_content_storage(AVFormatContext *s)
 535 {
 536     ByteIOContext *pb = s->pb;
 537
 538     mxf_write_metadata_key(pb, 0x011800);
 539     PRINT_KEY(s, "content storage key", pb->buf_ptr - 16);
 540     klv_encode_ber_length(pb, 92);
 541
 542     // write uid
 543     mxf_write_local_tag(pb, 16, 0x3C0A);
 544     mxf_write_uuid(pb, ContentStorage, 0);
 545     PRINT_KEY(s, "content storage uid", pb->buf_ptr - 16);
 546
 547     // write package reference
 548     mxf_write_local_tag(pb, 16 * 2 + 8, 0x1901);
 549     mxf_write_refs_count(pb, 2);
 550     mxf_write_uuid(pb, MaterialPackage, 0);
 551     mxf_write_uuid(pb, SourcePackage, 0);
 552
 553     // write essence container data
 554     mxf_write_local_tag(pb, 8 + 16, 0x1902);
 555     mxf_write_refs_count(pb, 1);
 556     mxf_write_uuid(pb, EssenceContainerData, 0);
 557 }
 558
 559 static void mxf_write_track(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 560 {
 561     MXFContext *mxf = s->priv_data;
 562     ByteIOContext *pb = s->pb;
 563     MXFStreamContext *sc = st->priv_data;
 564
 565     mxf_write_metadata_key(pb, 0x013b00);
 566     PRINT_KEY(s, "track key", pb->buf_ptr - 16);
 567     klv_encode_ber_length(pb, 80);
 568
 569     // write track uid
 570     mxf_write_local_tag(pb, 16, 0x3C0A);
 571     mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, st->index);
 572     PRINT_KEY(s, "track uid", pb->buf_ptr - 16);
 573
 574     // write track id
 575     mxf_write_local_tag(pb, 4, 0x4801);
 576     put_be32(pb, st->index+1);
 577
 578     // write track number
 579     mxf_write_local_tag(pb, 4, 0x4804);
 580     if (type == MaterialPackage)
 581         put_be32(pb, 0); // track number of material package is 0
 582     else
 583         put_buffer(pb, sc->track_essence_element_key + 12, 4);
 584
 585     mxf_write_local_tag(pb, 8, 0x4B01);
 586     put_be32(pb, mxf->time_base.den);
 587     put_be32(pb, mxf->time_base.num);
 588
 589     // write origin
 590     mxf_write_local_tag(pb, 8, 0x4B02);
 591     put_be64(pb, 0);
 592
 593     // write sequence refs
 594     mxf_write_local_tag(pb, 16, 0x4803);
 595     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 596 }
 597
 598 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 };
 599
 600 static void mxf_write_common_fields(AVFormatContext *s, AVStream *st)
 601 {
 602     MXFContext *mxf = s->priv_data;
 603     ByteIOContext *pb = s->pb;
 604
 605     // find data define uls
 606     mxf_write_local_tag(pb, 16, 0x0201);
 607     if (st == mxf->timecode_track)
 608         put_buffer(pb, smpte_12m_timecode_track_data_ul, 16);
 609     else {
 610         const MXFCodecUL *data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);
 611         put_buffer(pb, data_def_ul->uid, 16);
 612     }
 613
 614     // write duration
 615     mxf_write_local_tag(pb, 8, 0x0202);
 616     put_be64(pb, mxf->duration);
 617 }
 618
 619 static void mxf_write_sequence(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 620 {
 621     MXFContext *mxf = s->priv_data;
 622     ByteIOContext *pb = s->pb;
 623     enum MXFMetadataSetType component;
 624
 625     mxf_write_metadata_key(pb, 0x010f00);
 626     PRINT_KEY(s, "sequence key", pb->buf_ptr - 16);
 627     klv_encode_ber_length(pb, 80);
 628
 629     mxf_write_local_tag(pb, 16, 0x3C0A);
 630     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 631
 632     PRINT_KEY(s, "sequence uid", pb->buf_ptr - 16);
 633     mxf_write_common_fields(s, st);
 634
 635     // write structural component
 636     mxf_write_local_tag(pb, 16 + 8, 0x1001);
 637     mxf_write_refs_count(pb, 1);
 638     if (st == mxf->timecode_track)
 639         component = TimecodeComponent;
 640     else
 641         component = SourceClip;
 642     if (type == SourcePackage)
 643         component += TypeBottom;
 644     mxf_write_uuid(pb, component, st->index);
 645 }
 646
 647 static void mxf_write_timecode_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 648 {
 649     MXFContext *mxf = s->priv_data;
 650     ByteIOContext *pb = s->pb;
 651
 652     mxf_write_metadata_key(pb, 0x011400);
 653     klv_encode_ber_length(pb, 75);
 654
 655     // UID
 656     mxf_write_local_tag(pb, 16, 0x3C0A);
 657     mxf_write_uuid(pb, type == MaterialPackage ? TimecodeComponent :
 658                    TimecodeComponent + TypeBottom, st->index);
 659
 660     mxf_write_common_fields(s, st);
 661
 662     // Start Time Code
 663     mxf_write_local_tag(pb, 8, 0x1501);
 664     put_be64(pb, mxf->timecode_start);
 665
 666     // Rounded Time Code Base
 667     mxf_write_local_tag(pb, 2, 0x1502);
 668     put_be16(pb, mxf->timecode_base);
 669
 670     // Drop Frame
 671     mxf_write_local_tag(pb, 1, 0x1503);
 672     put_byte(pb, mxf->timecode_drop_frame);
 673 }
 674
 675 static void mxf_write_structural_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 676 {
 677     ByteIOContext *pb = s->pb;
 678     int i;
 679
 680     mxf_write_metadata_key(pb, 0x011100);
 681     PRINT_KEY(s, "sturctural component key", pb->buf_ptr - 16);
 682     klv_encode_ber_length(pb, 108);
 683
 684     // write uid
 685     mxf_write_local_tag(pb, 16, 0x3C0A);
 686     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
 687
 688     PRINT_KEY(s, "structural component uid", pb->buf_ptr - 16);
 689     mxf_write_common_fields(s, st);
 690
 691     // write start_position
 692     mxf_write_local_tag(pb, 8, 0x1201);
 693     put_be64(pb, 0);
 694
 695     // write source package uid, end of the reference
 696     mxf_write_local_tag(pb, 32, 0x1101);
 697     if (type == SourcePackage) {
 698         for (i = 0; i < 4; i++)
 699             put_be64(pb, 0);
 700     } else
 701         mxf_write_umid(pb, SourcePackage, 0);
 702
 703     // write source track id
 704     mxf_write_local_tag(pb, 4, 0x1102);
 705     if (type == SourcePackage)
 706         put_be32(pb, 0);
 707     else
 708         put_be32(pb, st->index+1);
 709 }
 710
 711 static void mxf_write_multi_descriptor(AVFormatContext *s)
 712 {
 713     MXFContext *mxf = s->priv_data;
 714     ByteIOContext *pb = s->pb;
 715     const uint8_t *ul;
 716     int i;
 717
 718     mxf_write_metadata_key(pb, 0x014400);
 719     PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);
 720     klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);
 721
 722     mxf_write_local_tag(pb, 16, 0x3C0A);
 723     mxf_write_uuid(pb, MultipleDescriptor, 0);
 724     PRINT_KEY(s, "multi_desc uid", pb->buf_ptr - 16);
 725
 726     // write sample rate
 727     mxf_write_local_tag(pb, 8, 0x3001);
 728     put_be32(pb, mxf->time_base.den);
 729     put_be32(pb, mxf->time_base.num);
 730
 731     // write essence container ul
 732     mxf_write_local_tag(pb, 16, 0x3004);
 733     if (mxf->essence_container_count > 1)
 734         ul = multiple_desc_ul;
 735     else {
 736         MXFStreamContext *sc = s->streams[0]->priv_data;
 737         ul = mxf_essence_container_uls[sc->index].container_ul;
 738     }
 739     put_buffer(pb, ul, 16);
 740
 741     // write sub descriptor refs
 742     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x3F01);
 743     mxf_write_refs_count(pb, s->nb_streams);
 744     for (i = 0; i < s->nb_streams; i++)
 745         mxf_write_uuid(pb, SubDescriptor, i);
 746 }
 747
 748 static void mxf_write_generic_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 749 {
 750     MXFContext *mxf = s->priv_data;
 751     MXFStreamContext *sc = st->priv_data;
 752     ByteIOContext *pb = s->pb;
 753
 754     put_buffer(pb, key, 16);
 755     klv_encode_ber_length(pb, size+20+8+12+20);
 756
 757     mxf_write_local_tag(pb, 16, 0x3C0A);
 758     mxf_write_uuid(pb, SubDescriptor, st->index);
 759
 760     mxf_write_local_tag(pb, 4, 0x3006);
 761     put_be32(pb, st->index+1);
 762
 763     mxf_write_local_tag(pb, 8, 0x3001);
 764     put_be32(pb, mxf->time_base.den);
 765     put_be32(pb, mxf->time_base.num);
 766
 767     mxf_write_local_tag(pb, 16, 0x3004);
 768     put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
 769 }
 770
 771 static const UID mxf_mpegvideo_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 };
 772 static const UID mxf_wav_descriptor_key       = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 };
 773 static const UID mxf_aes3_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 };
 774 static const UID mxf_cdci_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x28,0x00 };
 775 static const UID mxf_generic_sound_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x42,0x00 };
 776
 777 static void mxf_write_cdci_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 778 {
 779     MXFStreamContext *sc = st->priv_data;
 780     ByteIOContext *pb = s->pb;
 781     int stored_height = (st->codec->height+15)/16*16;
 782     int display_height;
 783     int f1, f2;
 784
 785     mxf_write_generic_desc(s, st, key, size+8+8+8+8+8+8+5+16+sc->interlaced*4+12+20);
 786
 787     mxf_write_local_tag(pb, 4, 0x3203);
 788     put_be32(pb, st->codec->width);
 789
 790     mxf_write_local_tag(pb, 4, 0x3202);
 791     put_be32(pb, stored_height>>sc->interlaced);
 792
 793     mxf_write_local_tag(pb, 4, 0x3209);
 794     put_be32(pb, st->codec->width);
 795
 796     if (st->codec->height == 608) // PAL + VBI
 797         display_height = 576;
 798     else if (st->codec->height == 512)  // NTSC + VBI
 799         display_height = 486;
 800     else
 801         display_height = st->codec->height;
 802
 803     mxf_write_local_tag(pb, 4, 0x3208);
 804     put_be32(pb, display_height>>sc->interlaced);
 805
 806     // component depth
 807     mxf_write_local_tag(pb, 4, 0x3301);
 808     put_be32(pb, 8);
 809
 810     // horizontal subsampling
 811     mxf_write_local_tag(pb, 4, 0x3302);
 812     put_be32(pb, 2);
 813
 814     // frame layout
 815     mxf_write_local_tag(pb, 1, 0x320C);
 816     put_byte(pb, sc->interlaced);
 817
 818     // video line map
 819     switch (st->codec->height) {
 820     case  576: f1 = 23; f2 = 336; break;
 821     case  608: f1 =  7; f2 = 320; break;
 822     case  480: f1 = 20; f2 = 283; break;
 823     case  512: f1 =  7; f2 = 270; break;
 824     case  720: f1 = 26; f2 =   0; break; // progressive
 825     case 1080: f1 = 21; f2 = 584; break;
 826     default:   f1 =  0; f2 =   0; break;
 827     }
 828
 829     if (!sc->interlaced) {
 830         f2  = 0;
 831         f1 *= 2;
 832     }
 833
 834     mxf_write_local_tag(pb, 12+sc->interlaced*4, 0x320D);
 835     put_be32(pb, sc->interlaced ? 2 : 1);
 836     put_be32(pb, 4);
 837     put_be32(pb, f1);
 838     if (sc->interlaced)
 839         put_be32(pb, f2);
 840
 841     mxf_write_local_tag(pb, 8, 0x320E);
 842     put_be32(pb, sc->aspect_ratio.num);
 843     put_be32(pb, sc->aspect_ratio.den);
 844
 845     mxf_write_local_tag(pb, 16, 0x3201);
 846     put_buffer(pb, *sc->codec_ul, 16);
 847 }
 848
 849 static void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st)
 850 {
 851     mxf_write_cdci_common(s, st, mxf_cdci_descriptor_key, 0);
 852 }
 853
 854 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
 855 {
 856     ByteIOContext *pb = s->pb;
 857
 858     mxf_write_cdci_common(s, st, mxf_mpegvideo_descriptor_key, 8);
 859
 860     // bit rate
 861     mxf_write_local_tag(pb, 4, 0x8000);
 862     put_be32(pb, st->codec->bit_rate);
 863 }
 864
 865 static void mxf_write_generic_sound_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 866 {
 867     ByteIOContext *pb = s->pb;
 868
 869     mxf_write_generic_desc(s, st, key, size+5+12+8+8);
 870
 871     // audio locked
 872     mxf_write_local_tag(pb, 1, 0x3D02);
 873     put_byte(pb, 1);
 874
 875     // write audio sampling rate
 876     mxf_write_local_tag(pb, 8, 0x3D03);
 877     put_be32(pb, st->codec->sample_rate);
 878     put_be32(pb, 1);
 879
 880     mxf_write_local_tag(pb, 4, 0x3D07);
 881     put_be32(pb, st->codec->channels);
 882
 883     mxf_write_local_tag(pb, 4, 0x3D01);
 884     put_be32(pb, av_get_bits_per_sample(st->codec->codec_id));
 885 }
 886
 887 static void mxf_write_wav_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 888 {
 889     ByteIOContext *pb = s->pb;
 890
 891     mxf_write_generic_sound_common(s, st, key, size+6+8);
 892
 893     mxf_write_local_tag(pb, 2, 0x3D0A);
 894     put_be16(pb, st->codec->block_align);
 895
 896     // avg bytes per sec
 897     mxf_write_local_tag(pb, 4, 0x3D09);
 898     put_be32(pb, st->codec->block_align*st->codec->sample_rate);
 899 }
 900
 901 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)
 902 {
 903     mxf_write_wav_common(s, st, mxf_wav_descriptor_key, 0);
 904 }
 905
 906 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)
 907 {
 908     mxf_write_wav_common(s, st, mxf_aes3_descriptor_key, 0);
 909 }
 910
 911 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st)
 912 {
 913     mxf_write_generic_sound_common(s, st, mxf_generic_sound_descriptor_key, 0);
 914 }
 915
 916 static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)
 917 {
 918     MXFContext *mxf = s->priv_data;
 919     ByteIOContext *pb = s->pb;
 920     int i, track_count = s->nb_streams+1;
 921
 922     if (type == MaterialPackage) {
 923         mxf_write_metadata_key(pb, 0x013600);
 924         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);
 925         klv_encode_ber_length(pb, 92 + 16*track_count);
 926     } else {
 927         mxf_write_metadata_key(pb, 0x013700);
 928         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);
 929         klv_encode_ber_length(pb, 112 + 16*track_count); // 20 bytes length for descriptor reference
 930     }
 931
 932     // write uid
 933     mxf_write_local_tag(pb, 16, 0x3C0A);
 934     mxf_write_uuid(pb, type, 0);
 935     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);
 936     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);
 937
 938     // write package umid
 939     mxf_write_local_tag(pb, 32, 0x4401);
 940     mxf_write_umid(pb, type, 0);
 941     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);
 942
 943     // package creation date
 944     mxf_write_local_tag(pb, 8, 0x4405);
 945     put_be64(pb, mxf->timestamp);
 946
 947     // package modified date
 948     mxf_write_local_tag(pb, 8, 0x4404);
 949     put_be64(pb, mxf->timestamp);
 950
 951     // write track refs
 952     mxf_write_local_tag(pb, track_count*16 + 8, 0x4403);
 953     mxf_write_refs_count(pb, track_count);
 954     mxf_write_uuid(pb, type == MaterialPackage ? Track :
 955                    Track + TypeBottom, -1); // timecode track
 956     for (i = 0; i < s->nb_streams; i++)
 957         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);
 958
 959     // write multiple descriptor reference
 960     if (type == SourcePackage) {
 961         mxf_write_local_tag(pb, 16, 0x4701);
 962         if (s->nb_streams > 1) {
 963             mxf_write_uuid(pb, MultipleDescriptor, 0);
 964             mxf_write_multi_descriptor(s);
 965         } else
 966             mxf_write_uuid(pb, SubDescriptor, 0);
 967     }
 968
 969     // write timecode track
 970     mxf_write_track(s, mxf->timecode_track, type);
 971     mxf_write_sequence(s, mxf->timecode_track, type);
 972     mxf_write_timecode_component(s, mxf->timecode_track, type);
 973
 974     for (i = 0; i < s->nb_streams; i++) {
 975         AVStream *st = s->streams[i];
 976         mxf_write_track(s, st, type);
 977         mxf_write_sequence(s, st, type);
 978         mxf_write_structural_component(s, st, type);
 979
 980         if (type == SourcePackage) {
 981             MXFStreamContext *sc = st->priv_data;
 982             mxf_essence_container_uls[sc->index].write_desc(s, st);
 983         }
 984     }
 985 }
 986
 987 static int mxf_write_essence_container_data(AVFormatContext *s)
 988 {
 989     ByteIOContext *pb = s->pb;
 990
 991     mxf_write_metadata_key(pb, 0x012300);
 992     klv_encode_ber_length(pb, 72);
 993
 994     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID
 995     mxf_write_uuid(pb, EssenceContainerData, 0);
 996
 997     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID
 998     mxf_write_umid(pb, SourcePackage, 0);
 999
1000     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID
1001     put_be32(pb, 1);
1002
1003     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID
1004     put_be32(pb, 2);
1005
1006     return 0;
1007 }
1008
1009 static int mxf_write_header_metadata_sets(AVFormatContext *s)
1010 {
1011     mxf_write_preface(s);
1012     mxf_write_identification(s);
1013     mxf_write_content_storage(s);
1014     mxf_write_package(s, MaterialPackage);
1015     mxf_write_package(s, SourcePackage);
1016     mxf_write_essence_container_data(s);
1017     return 0;
1018 }
1019
1020 static unsigned klv_fill_size(uint64_t size)
1021 {
1022     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));
1023     if (pad < 20) // smallest fill item possible
1024         return pad + KAG_SIZE;
1025     else
1026         return pad & (KAG_SIZE-1);
1027 }
1028
1029 static void mxf_write_index_table_segment(AVFormatContext *s)
1030 {
1031     MXFContext *mxf = s->priv_data;
1032     ByteIOContext *pb = s->pb;
1033     int i, j;
1034     int temporal_reordering = 0;
1035     int key_index = mxf->last_key_index;
1036
1037     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);
1038
1039     if (!mxf->edit_units_count && !mxf->edit_unit_byte_count)
1040         return;
1041
1042     put_buffer(pb, index_table_segment_key, 16);
1043
1044     if (mxf->edit_unit_byte_count) {
1045         klv_encode_ber_length(pb, 85);
1046     } else {
1047         klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1)*6 +
1048                               12+mxf->edit_units_count*(11+mxf->slice_count*4));
1049     }
1050
1051     // instance id
1052     mxf_write_local_tag(pb, 16, 0x3C0A);
1053     mxf_write_uuid(pb, IndexTableSegment, 0);
1054
1055     // index edit rate
1056     mxf_write_local_tag(pb, 8, 0x3F0B);
1057     put_be32(pb, mxf->time_base.num);
1058     put_be32(pb, mxf->time_base.den);
1059
1060     // index start position
1061     mxf_write_local_tag(pb, 8, 0x3F0C);
1062     put_be64(pb, mxf->last_indexed_edit_unit);
1063
1064     // index duration
1065     mxf_write_local_tag(pb, 8, 0x3F0D);
1066     put_be64(pb, mxf->edit_units_count);
1067
1068     // edit unit byte count
1069     mxf_write_local_tag(pb, 4, 0x3F05);
1070     put_be32(pb, mxf->edit_unit_byte_count);
1071
1072     // index sid
1073     mxf_write_local_tag(pb, 4, 0x3F06);
1074     put_be32(pb, 2);
1075
1076     // body sid
1077     mxf_write_local_tag(pb, 4, 0x3F07);
1078     put_be32(pb, 1);
1079
1080     // real slice count - 1
1081     mxf_write_local_tag(pb, 1, 0x3F08);
1082     put_byte(pb, mxf->slice_count);
1083
1084     if (!mxf->edit_unit_byte_count) {
1085         // delta entry array
1086         mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);
1087         put_be32(pb, s->nb_streams+1); // num of entries
1088         put_be32(pb, 6);               // size of one entry
1089         // write system item delta entry
1090         put_byte(pb, 0);
1091         put_byte(pb, 0); // slice entry
1092         put_be32(pb, 0); // element delta
1093         for (i = 0; i < s->nb_streams; i++) {
1094             AVStream *st = s->streams[i];
1095             MXFStreamContext *sc = st->priv_data;
1096             put_byte(pb, sc->temporal_reordering);
1097             if (sc->temporal_reordering)
1098                 temporal_reordering = 1;
1099             if (i == 0) { // video track
1100                 put_byte(pb, 0); // slice number
1101                 put_be32(pb, KAG_SIZE); // system item size including klv fill
1102             } else { // audio track
1103                 unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;
1104                 audio_frame_size += klv_fill_size(audio_frame_size);
1105                 put_byte(pb, 1);
1106                 put_be32(pb, (i-1)*audio_frame_size); // element delta
1107             }
1108         }
1109
1110         mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);
1111         put_be32(pb, mxf->edit_units_count);  // num of entries
1112         put_be32(pb, 11+mxf->slice_count*4);  // size of one entry
1113         for (i = 0; i < mxf->edit_units_count; i++) {
1114             if (temporal_reordering) {
1115                 int temporal_offset = 0;
1116                 for (j = i+1; j < mxf->edit_units_count; j++) {
1117                     temporal_offset++;
1118                     if (mxf->index_entries[j].flags & 0x10) { // backward prediction
1119                         // next is not b, so is reordered
1120                         if (!(mxf->index_entries[i+1].flags & 0x10)) {
1121                             if ((mxf->index_entries[i].flags & 0x11) == 0) // i frame
1122                                 temporal_offset = 0;
1123                             else
1124                                 temporal_offset = -temporal_offset;
1125                         }
1126                         break;
1127                     }
1128                 }
1129                 put_byte(pb, temporal_offset);
1130             } else
1131                 put_byte(pb, 0);
1132             if (!(mxf->index_entries[i].flags & 0x33)) { // I frame
1133                 mxf->last_key_index = key_index;
1134                 key_index = i;
1135             }
1136             if (mxf->index_entries[i].flags & 0x10 && // backward prediction
1137                 !(mxf->index_entries[key_index].flags & 0x80)) { // open gop
1138                 put_byte(pb, mxf->last_key_index - i);
1139             } else {
1140                 put_byte(pb, key_index - i); // key frame offset
1141                 if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward
1142                     mxf->last_key_index = key_index;
1143             }
1144             put_byte(pb, mxf->index_entries[i].flags);
1145             // stream offset
1146             put_be64(pb, mxf->index_entries[i].offset);
1147             if (s->nb_streams > 1)
1148                 put_be32(pb, mxf->index_entries[i].slice_offset);
1149         }
1150
1151         mxf->last_key_index = key_index - mxf->edit_units_count;
1152         mxf->last_indexed_edit_unit += mxf->edit_units_count;
1153         mxf->edit_units_count = 0;
1154     }
1155 }
1156
1157 static void mxf_write_klv_fill(AVFormatContext *s)
1158 {
1159     unsigned pad = klv_fill_size(url_ftell(s->pb));
1160     if (pad) {
1161         put_buffer(s->pb, klv_fill_key, 16);
1162         pad -= 16 + 4;
1163         klv_encode_ber4_length(s->pb, pad);
1164         for (; pad; pad--)
1165             put_byte(s->pb, 0);
1166         assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));
1167     }
1168 }
1169
1170 static void mxf_write_partition(AVFormatContext *s, int bodysid,
1171                                 int indexsid,
1172                                 const uint8_t *key, int write_metadata)
1173 {
1174     MXFContext *mxf = s->priv_data;
1175     ByteIOContext *pb = s->pb;
1176     int64_t header_byte_count_offset;
1177     unsigned index_byte_count = 0;
1178     uint64_t partition_offset = url_ftell(pb);
1179
1180     if (!mxf->edit_unit_byte_count && mxf->edit_units_count)
1181         index_byte_count = 85 + 12+(s->nb_streams+1)*6 +
1182             12+mxf->edit_units_count*(11+mxf->slice_count*4);
1183     else if (mxf->edit_unit_byte_count && indexsid)
1184         index_byte_count = 85;
1185
1186     if (index_byte_count) {
1187         // add encoded ber length
1188         index_byte_count += 16 + klv_ber_length(index_byte_count);
1189         index_byte_count += klv_fill_size(index_byte_count);
1190     }
1191
1192     if (!memcmp(key, body_partition_key, 16)) {
1193         mxf->body_partition_offset =
1194             av_realloc(mxf->body_partition_offset,
1195                        (mxf->body_partitions_count+1)*
1196                        sizeof(*mxf->body_partition_offset));
1197         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;
1198     }
1199
1200     // write klv
1201     put_buffer(pb, key, 16);
1202     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);
1203
1204     // write partition value
1205     put_be16(pb, 1); // majorVersion
1206     put_be16(pb, 2); // minorVersion
1207     put_be32(pb, KAG_SIZE); // KAGSize
1208
1209     put_be64(pb, partition_offset); // ThisPartition
1210
1211     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)
1212         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition
1213     else if (!memcmp(key, footer_partition_key, 16) && mxf->body_partitions_count)
1214         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition
1215     else
1216         put_be64(pb, 0);
1217
1218     put_be64(pb, mxf->footer_partition_offset); // footerPartition
1219
1220     // set offset
1221     header_byte_count_offset = url_ftell(pb);
1222     put_be64(pb, 0); // headerByteCount, update later
1223
1224     // indexTable
1225     put_be64(pb, index_byte_count); // indexByteCount
1226     put_be32(pb, index_byte_count ? indexsid : 0); // indexSID
1227
1228     // BodyOffset
1229     if (bodysid && mxf->edit_units_count && mxf->body_partitions_count) {
1230         put_be64(pb, mxf->body_offset);
1231     } else
1232         put_be64(pb, 0);
1233
1234     put_be32(pb, bodysid); // bodySID
1235
1236     // operational pattern
1237     if (s->nb_streams > 1) {
1238         put_buffer(pb, op1a_ul, 14);
1239         put_be16(pb, 0x0900); // multi track
1240     } else {
1241         put_buffer(pb, op1a_ul, 16);
1242     }
1243
1244     // essence container
1245     mxf_write_essence_container_refs(s);
1246
1247     if (write_metadata) {
1248         // mark the start of the headermetadata and calculate metadata size
1249         int64_t pos, start;
1250         unsigned header_byte_count;
1251
1252         mxf_write_klv_fill(s);
1253         start = url_ftell(s->pb);
1254         mxf_write_primer_pack(s);
1255         mxf_write_header_metadata_sets(s);
1256         pos = url_ftell(s->pb);
1257         header_byte_count = pos - start + klv_fill_size(pos);
1258
1259         // update header_byte_count
1260         url_fseek(pb, header_byte_count_offset, SEEK_SET);
1261         put_be64(pb, header_byte_count);
1262         url_fseek(pb, pos, SEEK_SET);
1263     }
1264
1265     put_flush_packet(pb);
1266 }
1267
1268 static const UID mxf_mpeg2_codec_uls[] = {
1269     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame
1270     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP
1271     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame
1272     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP
1273     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame
1274     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP
1275     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame
1276     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP
1277 };
1278
1279 static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)
1280 {
1281     if (avctx->profile == 4) { // Main
1282         if (avctx->level == 8) // Main
1283             return avctx->gop_size ?
1284                 &mxf_mpeg2_codec_uls[1] :
1285                 &mxf_mpeg2_codec_uls[0];
1286         else if (avctx->level == 4) // High
1287             return avctx->gop_size ?
1288                 &mxf_mpeg2_codec_uls[5] :
1289                 &mxf_mpeg2_codec_uls[4];
1290     } else if (avctx->profile == 0) { // 422
1291         if (avctx->level == 5) // Main
1292             return avctx->gop_size ?
1293                 &mxf_mpeg2_codec_uls[3] :
1294                 &mxf_mpeg2_codec_uls[2];
1295         else if (avctx->level == 2) // High
1296             return avctx->gop_size ?
1297                 &mxf_mpeg2_codec_uls[7] :
1298                 &mxf_mpeg2_codec_uls[6];
1299     }
1300     return NULL;
1301 }
1302
1303 static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt, int *flags)
1304 {
1305     MXFStreamContext *sc = st->priv_data;
1306     MXFContext *mxf = s->priv_data;
1307     uint32_t c = -1;
1308     int i;
1309
1310     *flags = 0;
1311
1312     for(i = 0; i < pkt->size - 4; i++) {
1313         c = (c<<8) + pkt->data[i];
1314         if (c == 0x1B5) {
1315             if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
1316                 st->codec->profile = pkt->data[i+1] & 0x07;
1317                 st->codec->level   = pkt->data[i+2] >> 4;
1318             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext
1319                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame
1320                 break;
1321             }
1322         } else if (c == 0x1b8) { // gop
1323             if (i + 4 < pkt->size) {
1324                 if (pkt->data[i+4]>>6 & 0x01) // closed
1325                     *flags |= 0x80; // random access
1326                 if (!mxf->header_written) {
1327                     unsigned hours   =  (pkt->data[i+1]>>2) & 0x1f;
1328                     unsigned minutes = ((pkt->data[i+1] & 0x03) << 4) | (pkt->data[i+2]>>4);
1329                     unsigned seconds = ((pkt->data[i+2] & 0x07) << 3) | (pkt->data[i+3]>>5);
1330                     unsigned frames  = ((pkt->data[i+3] & 0x1f) << 1) | (pkt->data[i+4]>>7);
1331                     mxf->timecode_drop_frame = !!(pkt->data[i+1] & 0x80);
1332                     mxf->timecode_start = (hours*3600 + minutes*60 + seconds) *
1333                         mxf->timecode_base + frames;
1334                     if (mxf->timecode_drop_frame) {
1335                         unsigned tminutes = 60 * hours + minutes;
1336                         mxf->timecode_start -= 2 * (tminutes - tminutes / 10);
1337                     }
1338                     av_log(s, AV_LOG_DEBUG, "frame %d %d:%d:%d%c%d\n", mxf->timecode_start,
1339                            hours, minutes, seconds, mxf->timecode_drop_frame ? ';':':', frames);
1340                 }
1341             }
1342         } else if (c == 0x1b3) { // seq
1343             *flags |= 0x40;
1344             if (i + 4 < pkt->size) {
1345                 switch ((pkt->data[i+4]>>4) & 0xf) {
1346                 case 2:  sc->aspect_ratio = (AVRational){  4,  3}; break;
1347                 case 3:  sc->aspect_ratio = (AVRational){ 16,  9}; break;
1348                 case 4:  sc->aspect_ratio = (AVRational){221,100}; break;
1349                 default:
1350                     av_reduce(&sc->aspect_ratio.num, &sc->aspect_ratio.den,
1351                               st->codec->width, st->codec->height, 1024*1024);
1352                 }
1353             }
1354         } else if (c == 0x100) { // pic
1355             int pict_type = (pkt->data[i+2]>>3) & 0x07;
1356             if (pict_type == 2) { // P frame
1357                 *flags |= 0x22;
1358                 st->codec->gop_size = 1;
1359             } else if (pict_type == 3) { // B frame
1360                 *flags |= 0x33;
1361                 sc->temporal_reordering = -1;
1362             } else if (!pict_type) {
1363                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");
1364                 return 0;
1365             }
1366         }
1367     }
1368     if (s->oformat != &mxf_d10_muxer)
1369         sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);
1370     return !!sc->codec_ul;
1371 }
1372
1373 static uint64_t mxf_parse_timestamp(time_t timestamp)
1374 {
1375     struct tm *time = localtime(&timestamp);
1376     return (uint64_t)(time->tm_year+1900) << 48 |
1377            (uint64_t)(time->tm_mon+1)     << 40 |
1378            (uint64_t) time->tm_mday       << 32 |
1379                       time->tm_hour       << 24 |
1380                       time->tm_min        << 16 |
1381                       time->tm_sec        << 8;
1382 }
1383
1384 static int mxf_write_header(AVFormatContext *s)
1385 {
1386     MXFContext *mxf = s->priv_data;
1387     int i;
1388     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};
1389     const int *samples_per_frame = NULL;
1390
1391     for (i = 0; i < s->nb_streams; i++) {
1392         AVStream *st = s->streams[i];
1393         MXFStreamContext *sc = av_mallocz(sizeof(*sc));
1394         if (!sc)
1395             return AVERROR(ENOMEM);
1396         st->priv_data = sc;
1397
1398         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
1399             if (i != 0) {
1400                 av_log(s, AV_LOG_ERROR, "video stream must be first track\n");
1401                 return -1;
1402             }
1403             if (fabs(av_q2d(st->codec->time_base) - 1/25.0) < 0.0001) {
1404                 samples_per_frame = PAL_samples_per_frame;
1405                 mxf->time_base = (AVRational){ 1, 25 };
1406                 mxf->timecode_base = 25;
1407             } else if (fabs(av_q2d(st->codec->time_base) - 1001/30000.0) < 0.0001) {
1408                 samples_per_frame = NTSC_samples_per_frame;
1409                 mxf->time_base = (AVRational){ 1001, 30000 };
1410                 mxf->timecode_base = 30;
1411             } else {
1412                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");
1413                 return -1;
1414             }
1415             av_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);
1416             if (s->oformat == &mxf_d10_muxer) {
1417                 if (st->codec->bit_rate == 50000000)
1418                     if (mxf->time_base.den == 25) sc->index = 3;
1419                     else                          sc->index = 5;
1420                 else if (st->codec->bit_rate == 40000000)
1421                     if (mxf->time_base.den == 25) sc->index = 7;
1422                     else                          sc->index = 9;
1423                 else if (st->codec->bit_rate == 30000000)
1424                     if (mxf->time_base.den == 25) sc->index = 11;
1425                     else                          sc->index = 13;
1426                 else {
1427                     av_log(s, AV_LOG_ERROR, "error MXF D-10 only support 30/40/50 mbit/s\n");
1428                     return -1;
1429                 }
1430
1431                 mxf->edit_unit_byte_count = KAG_SIZE; // system element
1432                 mxf->edit_unit_byte_count += 16 + 4 + (uint64_t)st->codec->bit_rate *
1433                     mxf->time_base.num / (8*mxf->time_base.den);
1434                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);
1435                 mxf->edit_unit_byte_count += 16 + 4 + 4 + samples_per_frame[0]*8*4;
1436                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);
1437             }
1438         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1439             if (st->codec->sample_rate != 48000) {
1440                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");
1441                 return -1;
1442             }
1443             av_set_pts_info(st, 64, 1, st->codec->sample_rate);
1444             if (s->oformat == &mxf_d10_muxer) {
1445                 if (st->index != 1) {
1446                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support one audio track\n");
1447                     return -1;
1448                 }
1449                 if (st->codec->codec_id != CODEC_ID_PCM_S16LE &&
1450                     st->codec->codec_id != CODEC_ID_PCM_S24LE) {
1451                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support 16 or 24 bits le audio\n");
1452                 }
1453                 sc->index = ((MXFStreamContext*)s->streams[0]->priv_data)->index + 1;
1454             } else
1455             mxf->slice_count = 1;
1456         }
1457
1458         if (!sc->index) {
1459             sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);
1460             if (sc->index == -1) {
1461                 av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "
1462                        "codec not currently supported in container\n", i);
1463                 return -1;
1464             }
1465         }
1466
1467         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;
1468
1469         if (!present[sc->index]) {
1470             present[sc->index] = 1;
1471             mxf->essence_container_count++;
1472         } else
1473             present[sc->index]++;
1474
1475         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);
1476         sc->track_essence_element_key[15] = present[sc->index];
1477         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);
1478     }
1479
1480     if (s->oformat == &mxf_d10_muxer) {
1481         mxf->essence_container_count = 1;
1482     }
1483
1484     for (i = 0; i < s->nb_streams; i++) {
1485         MXFStreamContext *sc = s->streams[i]->priv_data;
1486         // update element count
1487         sc->track_essence_element_key[13] = present[sc->index];
1488         sc->order = AV_RB32(sc->track_essence_element_key+12);
1489     }
1490
1491     mxf->timestamp = mxf_parse_timestamp(s->timestamp);
1492     mxf->duration = -1;
1493
1494     mxf->timecode_track = av_mallocz(sizeof(*mxf->timecode_track));
1495     if (!mxf->timecode_track)
1496         return AVERROR(ENOMEM);
1497     mxf->timecode_track->priv_data = av_mallocz(sizeof(MXFStreamContext));
1498     if (!mxf->timecode_track->priv_data)
1499         return AVERROR(ENOMEM);
1500     mxf->timecode_track->index = -1;
1501
1502     if (!samples_per_frame)
1503         samples_per_frame = PAL_samples_per_frame;
1504
1505     if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)
1506         return -1;
1507
1508     return 0;
1509 }
1510
1511 static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };
1512 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 };
1513
1514 static uint32_t ff_framenum_to_12m_time_code(unsigned frame, int drop, int fps)
1515 {
1516     return (0                                    << 31) | // color frame flag
1517            (0                                    << 30) | // drop  frame flag
1518            ( ((frame % fps) / 10)                << 28) | // tens  of frames
1519            ( ((frame % fps) % 10)                << 24) | // units of frames
1520            (0                                    << 23) | // field phase (NTSC), b0 (PAL)
1521            ((((frame / fps) % 60) / 10)          << 20) | // tens  of seconds
1522            ((((frame / fps) % 60) % 10)          << 16) | // units of seconds
1523            (0                                    << 15) | // b0 (NTSC), b2 (PAL)
1524            ((((frame / (fps * 60)) % 60) / 10)   << 12) | // tens  of minutes
1525            ((((frame / (fps * 60)) % 60) % 10)   <<  8) | // units of minutes
1526            (0                                    <<  7) | // b1
1527            (0                                    <<  6) | // b2 (NSC), field phase (PAL)
1528            ((((frame / (fps * 3600) % 24)) / 10) <<  4) | // tens  of hours
1529            (  (frame / (fps * 3600) % 24)) % 10;          // units of hours
1530 }
1531
1532 static void mxf_write_system_item(AVFormatContext *s)
1533 {
1534     MXFContext *mxf = s->priv_data;
1535     ByteIOContext *pb = s->pb;
1536     unsigned frame;
1537     uint32_t time_code;
1538
1539     frame = mxf->timecode_start + mxf->last_indexed_edit_unit + mxf->edit_units_count;
1540
1541     // write system metadata pack
1542     put_buffer(pb, system_metadata_pack_key, 16);
1543     klv_encode_ber4_length(pb, 57);
1544     put_byte(pb, 0x5c); // UL, user date/time stamp, picture and sound item present
1545     put_byte(pb, 0x04); // content package rate
1546     put_byte(pb, 0x00); // content package type
1547     put_be16(pb, 0x00); // channel handle
1548     put_be16(pb, frame); // continuity count
1549     if (mxf->essence_container_count > 1)
1550         put_buffer(pb, multiple_desc_ul, 16);
1551     else {
1552         MXFStreamContext *sc = s->streams[0]->priv_data;
1553         put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
1554     }
1555     put_byte(pb, 0);
1556     put_be64(pb, 0);
1557     put_be64(pb, 0); // creation date/time stamp
1558
1559     put_byte(pb, 0x81); // SMPTE 12M time code
1560     time_code = ff_framenum_to_12m_time_code(frame, mxf->timecode_drop_frame, mxf->timecode_base);
1561     put_be32(pb, time_code);
1562     put_be32(pb, 0); // binary group data
1563     put_be64(pb, 0);
1564
1565     // write system metadata package set
1566     put_buffer(pb, system_metadata_package_set_key, 16);
1567     klv_encode_ber4_length(pb, 35);
1568     put_byte(pb, 0x83); // UMID
1569     put_be16(pb, 0x20);
1570     mxf_write_umid(pb, SourcePackage, 0);
1571 }
1572
1573 static void mxf_write_d10_video_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
1574 {
1575     MXFContext *mxf = s->priv_data;
1576     ByteIOContext *pb = s->pb;
1577     int packet_size = (uint64_t)st->codec->bit_rate*mxf->time_base.num /
1578         (8*mxf->time_base.den); // frame size
1579     int pad;
1580
1581     packet_size += 16 + 4;
1582     packet_size += klv_fill_size(packet_size);
1583
1584     klv_encode_ber4_length(pb, pkt->size);
1585     put_buffer(pb, pkt->data, pkt->size);
1586
1587     // ensure CBR muxing by padding to correct video frame size
1588     pad = packet_size - pkt->size - 16 - 4;
1589     if (pad > 20) {
1590         put_buffer(s->pb, klv_fill_key, 16);
1591         pad -= 16 + 4;
1592         klv_encode_ber4_length(s->pb, pad);
1593         for (; pad; pad--)
1594             put_byte(s->pb, 0);
1595         assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));
1596     } else {
1597         av_log(s, AV_LOG_WARNING, "cannot fill d-10 video packet\n");
1598         for (; pad > 0; pad--)
1599             put_byte(s->pb, 0);
1600     }
1601 }
1602
1603 static void mxf_write_d10_audio_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
1604 {
1605     MXFContext *mxf = s->priv_data;
1606     ByteIOContext *pb = s->pb;
1607     int frame_size = (pkt->size<<3) /
1608         (st->codec->channels*av_get_bits_per_sample(st->codec->codec_id));
1609     uint8_t *samples = pkt->data;
1610     uint8_t *end = pkt->data + pkt->size;
1611     int i;
1612
1613     klv_encode_ber4_length(pb, 4 + frame_size*4*8);
1614
1615     put_byte(pb, (frame_size == 1920 ? 0 : (mxf->edit_units_count-1) % 5 + 1));
1616     put_le16(pb, frame_size);
1617     put_byte(pb, (1<<st->codec->channels)-1);
1618
1619     while (samples < end) {
1620         for (i = 0; i < st->codec->channels; i++) {
1621             uint32_t sample;
1622             if (st->codec->codec_id == CODEC_ID_PCM_S24LE) {
1623                 sample = (AV_RL24(samples)<< 4)|((samples==pkt->data)<<3) | i;
1624                 samples += 3;
1625             } else {
1626                 sample = (AV_RL16(samples)<<12)|((samples==pkt->data)<<3) | i;
1627                 samples += 2;
1628             }
1629             put_le32(pb, sample);
1630         }
1631         for (; i < 8; i++)
1632             put_le32(pb, 0);
1633     }
1634 }
1635
1636 static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
1637 {
1638     MXFContext *mxf = s->priv_data;
1639     ByteIOContext *pb = s->pb;
1640     AVStream *st = s->streams[pkt->stream_index];
1641     MXFStreamContext *sc = st->priv_data;
1642     int flags = 0;
1643
1644     if (!mxf->edit_unit_byte_count && !(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {
1645         mxf->index_entries = av_realloc(mxf->index_entries,
1646             (mxf->edit_units_count + EDIT_UNITS_PER_BODY)*sizeof(*mxf->index_entries));
1647         if (!mxf->index_entries) {
1648             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");
1649             return -1;
1650         }
1651     }
1652
1653     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
1654         if (!mxf_parse_mpeg2_frame(s, st, pkt, &flags)) {
1655             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
1656             return -1;
1657         }
1658     }
1659
1660     if (!mxf->header_written) {
1661         if (mxf->edit_unit_byte_count) {
1662             mxf_write_partition(s, 1, 2, header_open_partition_key, 1);
1663             mxf_write_klv_fill(s);
1664             mxf_write_index_table_segment(s);
1665         } else {
1666             mxf_write_partition(s, 0, 0, header_open_partition_key, 1);
1667         }
1668         mxf->header_written = 1;
1669     }
1670
1671     if (st->index == 0) {
1672         if (!mxf->edit_unit_byte_count &&
1673             (!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&
1674             !(flags & 0x33)) { // I frame, Gop start
1675             mxf_write_klv_fill(s);
1676             mxf_write_partition(s, 1, 2, body_partition_key, 0);
1677
1678             mxf_write_klv_fill(s);
1679             mxf_write_index_table_segment(s);
1680         }
1681
1682         mxf_write_klv_fill(s);
1683         mxf_write_system_item(s);
1684
1685         if (!mxf->edit_unit_byte_count) {
1686             mxf->index_entries[mxf->edit_units_count].offset = mxf->body_offset;
1687             mxf->index_entries[mxf->edit_units_count].flags = flags;
1688             mxf->body_offset += KAG_SIZE; // size of system element
1689         }
1690         mxf->edit_units_count++;
1691     } else if (!mxf->edit_unit_byte_count && st->index == 1) {
1692         mxf->index_entries[mxf->edit_units_count-1].slice_offset =
1693             mxf->body_offset - mxf->index_entries[mxf->edit_units_count-1].offset;
1694     }
1695
1696     mxf_write_klv_fill(s);
1697     put_buffer(pb, sc->track_essence_element_key, 16); // write key
1698     if (s->oformat == &mxf_d10_muxer) {
1699         if (st->codec->codec_type == CODEC_TYPE_VIDEO)
1700             mxf_write_d10_video_packet(s, st, pkt);
1701         else
1702             mxf_write_d10_audio_packet(s, st, pkt);
1703     } else {
1704         klv_encode_ber4_length(pb, pkt->size); // write length
1705         put_buffer(pb, pkt->data, pkt->size);
1706         mxf->body_offset += 16+4+pkt->size + klv_fill_size(16+4+pkt->size);
1707     }
1708
1709     put_flush_packet(pb);
1710
1711     return 0;
1712 }
1713
1714 static void mxf_write_random_index_pack(AVFormatContext *s)
1715 {
1716     MXFContext *mxf = s->priv_data;
1717     ByteIOContext *pb = s->pb;
1718     uint64_t pos = url_ftell(pb);
1719     int i;
1720
1721     put_buffer(pb, random_index_pack_key, 16);
1722     klv_encode_ber_length(pb, 28 + 12*mxf->body_partitions_count);
1723
1724     if (mxf->edit_unit_byte_count)
1725         put_be32(pb, 1); // BodySID of header partition
1726     else
1727         put_be32(pb, 0); // BodySID of header partition
1728     put_be64(pb, 0); // offset of header partition
1729
1730     for (i = 0; i < mxf->body_partitions_count; i++) {
1731         put_be32(pb, 1); // BodySID
1732         put_be64(pb, mxf->body_partition_offset[i]);
1733     }
1734
1735     put_be32(pb, 0); // BodySID of footer partition
1736     put_be64(pb, mxf->footer_partition_offset);
1737
1738     put_be32(pb, url_ftell(pb) - pos + 4);
1739 }
1740
1741 static int mxf_write_footer(AVFormatContext *s)
1742 {
1743     MXFContext *mxf = s->priv_data;
1744     ByteIOContext *pb = s->pb;
1745
1746     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;
1747
1748     mxf_write_klv_fill(s);
1749     mxf->footer_partition_offset = url_ftell(pb);
1750     if (mxf->edit_unit_byte_count) { // no need to repeat index
1751         mxf_write_partition(s, 0, 0, footer_partition_key, 0);
1752     } else {
1753         mxf_write_partition(s, 0, 2, footer_partition_key, 0);
1754
1755         mxf_write_klv_fill(s);
1756         mxf_write_index_table_segment(s);
1757     }
1758
1759     mxf_write_klv_fill(s);
1760     mxf_write_random_index_pack(s);
1761
1762     if (!url_is_streamed(s->pb)) {
1763         url_fseek(pb, 0, SEEK_SET);
1764         if (mxf->edit_unit_byte_count) {
1765             mxf_write_partition(s, 1, 2, header_closed_partition_key, 1);
1766             mxf_write_klv_fill(s);
1767             mxf_write_index_table_segment(s);
1768         } else {
1769             mxf_write_partition(s, 0, 0, header_closed_partition_key, 1);
1770         }
1771     }
1772
1773     ff_audio_interleave_close(s);
1774
1775     av_freep(&mxf->index_entries);
1776     av_freep(&mxf->body_partition_offset);
1777     av_freep(&mxf->timecode_track->priv_data);
1778     av_freep(&mxf->timecode_track);
1779
1780     mxf_free(s);
1781
1782     return 0;
1783 }
1784
1785 static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1786 {
1787     AVPacketList *pktl;
1788     int stream_count = 0;
1789     int streams[MAX_STREAMS];
1790
1791     memset(streams, 0, sizeof(streams));
1792     pktl = s->packet_buffer;
1793     while (pktl) {
1794         //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);
1795         if (!streams[pktl->pkt.stream_index])
1796             stream_count++;
1797         streams[pktl->pkt.stream_index]++;
1798         pktl = pktl->next;
1799     }
1800
1801     if (stream_count && (s->nb_streams == stream_count || flush)) {
1802         pktl = s->packet_buffer;
1803         if (s->nb_streams != stream_count) {
1804             AVPacketList *last = NULL;
1805             // find last packet in edit unit
1806             while (pktl) {
1807                 if (!stream_count || pktl->pkt.stream_index == 0)
1808                     break;
1809                 last = pktl;
1810                 pktl = pktl->next;
1811                 stream_count--;
1812             }
1813             // purge packet queue
1814             while (pktl) {
1815                 AVPacketList *next = pktl->next;
1816                 av_free_packet(&pktl->pkt);
1817                 av_freep(&pktl);
1818                 pktl = next;
1819             }
1820             if (last)
1821                 last->next = NULL;
1822             else {
1823                 s->packet_buffer = NULL;
1824                 goto out;
1825             }
1826             pktl = s->packet_buffer;
1827         }
1828
1829         *out = pktl->pkt;
1830         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);
1831         s->packet_buffer = pktl->next;
1832         av_freep(&pktl);
1833         return 1;
1834     } else {
1835     out:
1836         av_init_packet(out);
1837         return 0;
1838     }
1839 }
1840
1841 static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
1842 {
1843     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;
1844     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;
1845
1846     return next->dts > pkt->dts ||
1847         (next->dts == pkt->dts && sc->order < sc2->order);
1848 }
1849
1850 static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1851 {
1852     return ff_audio_rechunk_interleave(s, out, pkt, flush,
1853                                mxf_interleave_get_packet, mxf_compare_timestamps);
1854 }
1855
1856 AVOutputFormat mxf_muxer = {
1857     "mxf",
1858     NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1859     "application/mxf",
1860     "mxf",
1861     sizeof(MXFContext),
1862     CODEC_ID_PCM_S16LE,
1863     CODEC_ID_MPEG2VIDEO,
1864     mxf_write_header,
1865     mxf_write_packet,
1866     mxf_write_footer,
1867     AVFMT_NOTIMESTAMPS,
1868     NULL,
1869     mxf_interleave,
1870 };
1871
1872 AVOutputFormat mxf_d10_muxer = {
1873     "mxf_d10",
1874     NULL_IF_CONFIG_SMALL("Material eXchange Format, D-10 Mapping"),
1875     "application/mxf",
1876     NULL,
1877     sizeof(MXFContext),
1878     CODEC_ID_PCM_S16LE,
1879     CODEC_ID_MPEG2VIDEO,
1880     mxf_write_header,
1881     mxf_write_packet,
1882     mxf_write_footer,
1883     AVFMT_NOTIMESTAMPS,
1884     NULL,
1885     mxf_interleave,
1886 };