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 } MXFStreamContext;
  72
  73 typedef struct {
  74     UID container_ul;
  75     UID element_ul;
  76     UID codec_ul;
  77     void (*write_desc)();
  78 } MXFContainerEssenceEntry;
  79
  80 static const struct {
  81     enum CodecID id;
  82     int index;
  83 } mxf_essence_mappings[] = {
  84     { CODEC_ID_MPEG2VIDEO, 0 },
  85     { CODEC_ID_PCM_S24LE,  1 },
  86     { CODEC_ID_PCM_S16LE,  1 },
  87     { 0 }
  88 };
  89
  90 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st);
  91 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st);
  92 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st);
  93 static void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st);
  94 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st);
  95
  96 static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {
  97     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },
  98       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },
  99       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },
 100       mxf_write_mpegvideo_desc },
 101     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },
 102       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },
 103       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 104       mxf_write_aes3_desc },
 105     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },
 106       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },
 107       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 108       mxf_write_wav_desc },
 109     // D-10 625/50 PAL 50mb/s
 110     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },
 111       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 112       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 },
 113       mxf_write_cdci_desc },
 114     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },
 115       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 116       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 117       mxf_write_generic_sound_desc },
 118     // D-10 525/60 NTSC 50mb/s
 119     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },
 120       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 121       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x02 },
 122       mxf_write_cdci_desc },
 123     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },
 124       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 125       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 126       mxf_write_generic_sound_desc },
 127     // D-10 625/50 PAL 40mb/s
 128     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },
 129       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 130       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x03 },
 131       mxf_write_cdci_desc },
 132     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },
 133       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 134       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 135       mxf_write_generic_sound_desc },
 136     // D-10 525/60 NTSC 40mb/s
 137     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },
 138       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 139       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x04 },
 140       mxf_write_cdci_desc },
 141     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },
 142       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 143       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 144       mxf_write_generic_sound_desc },
 145     // D-10 625/50 PAL 30mb/s
 146     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },
 147       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 148       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 },
 149       mxf_write_cdci_desc },
 150     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },
 151       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 152       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 153       mxf_write_generic_sound_desc },
 154     // D-10 525/60 NTSC 30mb/s
 155     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },
 156       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
 157       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x06 },
 158       mxf_write_cdci_desc },
 159     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },
 160       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
 161       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 162       mxf_write_generic_sound_desc },
 163     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
 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       NULL },
 167 };
 168
 169 typedef struct MXFContext {
 170     int64_t footer_partition_offset;
 171     int essence_container_count;
 172     uint8_t essence_containers_indices[FF_ARRAY_ELEMS(mxf_essence_container_uls)];
 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 first_edit_unit_offset;
 181     uint64_t *body_partition_offset;
 182     unsigned body_partitions_count;
 183     int last_key_index;  ///< index of last key frame
 184     uint64_t duration;
 185     AVStream *timecode_track;
 186     int timecode_base;       ///< rounded time code base (25 or 30)
 187     int timecode_start;      ///< frame number computed from mpeg-2 gop header timecode
 188     int timecode_drop_frame; ///< time code use drop frame method frop mpeg-2 essence gop header
 189     int edit_unit_byte_count; ///< fixed edit unit byte count
 190 } 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         put_buffer(pb, mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul, 16);
 431         PRINT_KEY(s, "essence container ul:\n", mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul);
 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);
 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 if (type == MaterialPackage)
 641         component = SourceClip;
 642     else
 643         component = SourceClip+TypeBottom;
 644     mxf_write_uuid(pb, component, st->index);
 645 }
 646
 647 static void mxf_write_timecode_component(AVFormatContext *s, AVStream *st)
 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, TimecodeComponent, st->index);
 658
 659     mxf_write_common_fields(s, st);
 660
 661     // Start Time Code
 662     mxf_write_local_tag(pb, 8, 0x1501);
 663     put_be64(pb, mxf->timecode_start);
 664
 665     // Rounded Time Code Base
 666     mxf_write_local_tag(pb, 2, 0x1502);
 667     put_be16(pb, mxf->timecode_base);
 668
 669     // Drop Frame
 670     mxf_write_local_tag(pb, 1, 0x1503);
 671     put_byte(pb, mxf->timecode_drop_frame);
 672 }
 673
 674 static void mxf_write_structural_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 675 {
 676     ByteIOContext *pb = s->pb;
 677     int i;
 678
 679     mxf_write_metadata_key(pb, 0x011100);
 680     PRINT_KEY(s, "sturctural component key", pb->buf_ptr - 16);
 681     klv_encode_ber_length(pb, 108);
 682
 683     // write uid
 684     mxf_write_local_tag(pb, 16, 0x3C0A);
 685     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
 686
 687     PRINT_KEY(s, "structural component uid", pb->buf_ptr - 16);
 688     mxf_write_common_fields(s, st);
 689
 690     // write start_position
 691     mxf_write_local_tag(pb, 8, 0x1201);
 692     put_be64(pb, 0);
 693
 694     // write source package uid, end of the reference
 695     mxf_write_local_tag(pb, 32, 0x1101);
 696     if (type == SourcePackage) {
 697         for (i = 0; i < 4; i++)
 698             put_be64(pb, 0);
 699     } else
 700         mxf_write_umid(pb, SourcePackage, 0);
 701
 702     // write source track id
 703     mxf_write_local_tag(pb, 4, 0x1102);
 704     if (type == SourcePackage)
 705         put_be32(pb, 0);
 706     else
 707         put_be32(pb, st->index);
 708 }
 709
 710 static void mxf_write_multi_descriptor(AVFormatContext *s)
 711 {
 712     MXFContext *mxf = s->priv_data;
 713     ByteIOContext *pb = s->pb;
 714     const uint8_t *ul;
 715     int i;
 716
 717     mxf_write_metadata_key(pb, 0x014400);
 718     PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);
 719     klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);
 720
 721     mxf_write_local_tag(pb, 16, 0x3C0A);
 722     mxf_write_uuid(pb, MultipleDescriptor, 0);
 723     PRINT_KEY(s, "multi_desc uid", pb->buf_ptr - 16);
 724
 725     // write sample rate
 726     mxf_write_local_tag(pb, 8, 0x3001);
 727     put_be32(pb, mxf->time_base.den);
 728     put_be32(pb, mxf->time_base.num);
 729
 730     // write essence container ul
 731     mxf_write_local_tag(pb, 16, 0x3004);
 732     if (mxf->essence_container_count > 1)
 733         ul = multiple_desc_ul;
 734     else
 735         ul = mxf_essence_container_uls[mxf->essence_containers_indices[0]].container_ul;
 736     put_buffer(pb, ul, 16);
 737
 738     // write sub descriptor refs
 739     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x3F01);
 740     mxf_write_refs_count(pb, s->nb_streams);
 741     for (i = 0; i < s->nb_streams; i++)
 742         mxf_write_uuid(pb, SubDescriptor, i);
 743 }
 744
 745 static void mxf_write_generic_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 746 {
 747     MXFContext *mxf = s->priv_data;
 748     MXFStreamContext *sc = st->priv_data;
 749     ByteIOContext *pb = s->pb;
 750
 751     put_buffer(pb, key, 16);
 752     klv_encode_ber_length(pb, size);
 753
 754     mxf_write_local_tag(pb, 16, 0x3C0A);
 755     mxf_write_uuid(pb, SubDescriptor, st->index);
 756
 757     mxf_write_local_tag(pb, 4, 0x3006);
 758     put_be32(pb, st->index);
 759
 760     mxf_write_local_tag(pb, 8, 0x3001);
 761     put_be32(pb, mxf->time_base.den);
 762     put_be32(pb, mxf->time_base.num);
 763
 764     mxf_write_local_tag(pb, 16, 0x3004);
 765     put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
 766 }
 767
 768 static const UID mxf_mpegvideo_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 };
 769 static const UID mxf_wav_descriptor_key       = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 };
 770 static const UID mxf_aes3_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 };
 771 static const UID mxf_cdci_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x28,0x00 };
 772 static const UID mxf_generic_sound_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x42,0x00 };
 773
 774 static void mxf_write_cdci_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 775 {
 776     MXFStreamContext *sc = st->priv_data;
 777     ByteIOContext *pb = s->pb;
 778     int stored_height = (st->codec->height+15)/16*16;
 779     int display_height;
 780     AVRational dar;
 781     int f1, f2;
 782
 783     mxf_write_generic_desc(s, st, key, size);
 784
 785     mxf_write_local_tag(pb, 4, 0x3203);
 786     put_be32(pb, st->codec->width);
 787
 788     mxf_write_local_tag(pb, 4, 0x3202);
 789     put_be32(pb, stored_height>>sc->interlaced);
 790
 791     mxf_write_local_tag(pb, 4, 0x3209);
 792     put_be32(pb, st->codec->width);
 793
 794     if (st->codec->height == 608) // PAL + VBI
 795         display_height = 576;
 796     else if (st->codec->height == 512)  // NTSC + VBI
 797         display_height = 486;
 798     else
 799         display_height = st->codec->height;
 800
 801     mxf_write_local_tag(pb, 4, 0x3208);
 802     put_be32(pb, display_height>>sc->interlaced);
 803
 804     // component depth
 805     mxf_write_local_tag(pb, 4, 0x3301);
 806     put_be32(pb, 8);
 807
 808     // horizontal subsampling
 809     mxf_write_local_tag(pb, 4, 0x3302);
 810     put_be32(pb, 2);
 811
 812     // frame layout
 813     mxf_write_local_tag(pb, 1, 0x320C);
 814     put_byte(pb, sc->interlaced);
 815
 816     // video line map
 817     switch (st->codec->height) {
 818     case  576: f1 = 23; f2 = 336; break;
 819     case  608: f1 =  7; f2 = 320; break;
 820     case  480: f1 = 20; f2 = 283; break;
 821     case  512: f1 =  7; f2 = 270; break;
 822     case  720: f1 = 26; f2 =   0; break; // progressive
 823     case 1080: f1 = 21; f2 = 584; break;
 824     default:   f1 =  0; f2 =   0; break;
 825     }
 826
 827     if (!sc->interlaced) {
 828         f2  = 0;
 829         f1 *= 2;
 830     }
 831
 832     mxf_write_local_tag(pb, 12+sc->interlaced*4, 0x320D);
 833     put_be32(pb, sc->interlaced ? 2 : 1);
 834     put_be32(pb, 4);
 835     put_be32(pb, f1);
 836     if (sc->interlaced)
 837         put_be32(pb, f2);
 838
 839     av_reduce(&dar.num, &dar.den,
 840               st->codec->width*st->codec->sample_aspect_ratio.num,
 841               st->codec->height*st->codec->sample_aspect_ratio.den,
 842               1024*1024);
 843
 844     mxf_write_local_tag(pb, 8, 0x320E);
 845     put_be32(pb, dar.num);
 846     put_be32(pb, dar.den);
 847
 848     mxf_write_local_tag(pb, 16, 0x3201);
 849     put_buffer(pb, *sc->codec_ul, 16);
 850 }
 851
 852 static void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st)
 853 {
 854     MXFStreamContext *sc = st->priv_data;
 855     mxf_write_cdci_common(s, st, mxf_cdci_descriptor_key, 161+sc->interlaced*4);
 856 }
 857
 858 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
 859 {
 860     MXFStreamContext *sc = st->priv_data;
 861     ByteIOContext *pb = s->pb;
 862
 863     mxf_write_cdci_common(s, st, mxf_mpegvideo_descriptor_key, 169+sc->interlaced*4);
 864
 865     // bit rate
 866     mxf_write_local_tag(pb, 4, 0x8000);
 867     put_be32(pb, st->codec->bit_rate);
 868 }
 869
 870 static void mxf_write_generic_sound_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 871 {
 872     ByteIOContext *pb = s->pb;
 873
 874     mxf_write_generic_desc(s, st, key, size);
 875
 876     // audio locked
 877     mxf_write_local_tag(pb, 1, 0x3D02);
 878     put_byte(pb, 1);
 879
 880     // write audio sampling rate
 881     mxf_write_local_tag(pb, 8, 0x3D03);
 882     put_be32(pb, st->codec->sample_rate);
 883     put_be32(pb, 1);
 884
 885     mxf_write_local_tag(pb, 4, 0x3D07);
 886     put_be32(pb, st->codec->channels);
 887
 888     mxf_write_local_tag(pb, 4, 0x3D01);
 889     put_be32(pb, av_get_bits_per_sample(st->codec->codec_id));
 890 }
 891
 892 static void mxf_write_wav_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 893 {
 894     ByteIOContext *pb = s->pb;
 895
 896     mxf_write_generic_sound_common(s, st, key, size);
 897
 898     mxf_write_local_tag(pb, 2, 0x3D0A);
 899     put_be16(pb, st->codec->block_align);
 900
 901     // avg bytes per sec
 902     mxf_write_local_tag(pb, 4, 0x3D09);
 903     put_be32(pb, st->codec->block_align*st->codec->sample_rate);
 904 }
 905
 906 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)
 907 {
 908     mxf_write_wav_common(s, st, mxf_wav_descriptor_key, 107);
 909 }
 910
 911 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)
 912 {
 913     mxf_write_wav_common(s, st, mxf_aes3_descriptor_key, 107);
 914 }
 915
 916 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st)
 917 {
 918     mxf_write_generic_sound_common(s, st, mxf_generic_sound_descriptor_key, 93);
 919 }
 920
 921 static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)
 922 {
 923     MXFContext *mxf = s->priv_data;
 924     ByteIOContext *pb = s->pb;
 925     int i, track_count;
 926
 927     if (type == MaterialPackage) {
 928         track_count = s->nb_streams + 1; // add timecode track
 929         mxf_write_metadata_key(pb, 0x013600);
 930         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);
 931         klv_encode_ber_length(pb, 92 + 16*track_count);
 932     } else {
 933         track_count = s->nb_streams;
 934         mxf_write_metadata_key(pb, 0x013700);
 935         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);
 936         klv_encode_ber_length(pb, 112 + 16*track_count); // 20 bytes length for descriptor reference
 937     }
 938
 939     // write uid
 940     mxf_write_local_tag(pb, 16, 0x3C0A);
 941     mxf_write_uuid(pb, type, 0);
 942     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);
 943     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);
 944
 945     // write package umid
 946     mxf_write_local_tag(pb, 32, 0x4401);
 947     mxf_write_umid(pb, type, 0);
 948     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);
 949
 950     // package creation date
 951     mxf_write_local_tag(pb, 8, 0x4405);
 952     put_be64(pb, mxf->timestamp);
 953
 954     // package modified date
 955     mxf_write_local_tag(pb, 8, 0x4404);
 956     put_be64(pb, mxf->timestamp);
 957
 958     // write track refs
 959     mxf_write_local_tag(pb, track_count*16 + 8, 0x4403);
 960     mxf_write_refs_count(pb, track_count);
 961     for (i = 0; i < s->nb_streams; i++)
 962         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);
 963     if (type == MaterialPackage)
 964         mxf_write_uuid(pb, Track, s->nb_streams); // timecode track
 965
 966     // write multiple descriptor reference
 967     if (type == SourcePackage) {
 968         mxf_write_local_tag(pb, 16, 0x4701);
 969         if (s->nb_streams > 1) {
 970             mxf_write_uuid(pb, MultipleDescriptor, 0);
 971             mxf_write_multi_descriptor(s);
 972         } else
 973             mxf_write_uuid(pb, SubDescriptor, 0);
 974     } else {
 975         // write timecode track
 976         mxf_write_track(s, mxf->timecode_track, type);
 977         mxf_write_sequence(s, mxf->timecode_track, type);
 978         mxf_write_timecode_component(s, mxf->timecode_track);
 979     }
 980
 981     for (i = 0; i < s->nb_streams; i++) {
 982         AVStream *st = s->streams[i];
 983         mxf_write_track(s, st, type);
 984         mxf_write_sequence(s, st, type);
 985         mxf_write_structural_component(s, st, type);
 986
 987         if (type == SourcePackage) {
 988             MXFStreamContext *sc = st->priv_data;
 989             mxf_essence_container_uls[sc->index].write_desc(s, st);
 990         }
 991     }
 992 }
 993
 994 static int mxf_write_essence_container_data(AVFormatContext *s)
 995 {
 996     ByteIOContext *pb = s->pb;
 997
 998     mxf_write_metadata_key(pb, 0x012300);
 999     klv_encode_ber_length(pb, 72);
1000
1001     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID
1002     mxf_write_uuid(pb, EssenceContainerData, 0);
1003
1004     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID
1005     mxf_write_umid(pb, SourcePackage, 0);
1006
1007     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID
1008     put_be32(pb, 1);
1009
1010     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID
1011     put_be32(pb, 2);
1012
1013     return 0;
1014 }
1015
1016 static int mxf_write_header_metadata_sets(AVFormatContext *s)
1017 {
1018     mxf_write_preface(s);
1019     mxf_write_identification(s);
1020     mxf_write_content_storage(s);
1021     mxf_write_package(s, MaterialPackage);
1022     mxf_write_package(s, SourcePackage);
1023     mxf_write_essence_container_data(s);
1024     return 0;
1025 }
1026
1027 static unsigned klv_fill_size(uint64_t size)
1028 {
1029     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));
1030     if (pad < 20) // smallest fill item possible
1031         return pad + KAG_SIZE;
1032     else
1033         return pad & (KAG_SIZE-1);
1034 }
1035
1036 static void mxf_write_index_table_segment(AVFormatContext *s)
1037 {
1038     MXFContext *mxf = s->priv_data;
1039     ByteIOContext *pb = s->pb;
1040     int i, j;
1041     int temporal_reordering = 0;
1042     int key_index = mxf->last_key_index;
1043
1044     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);
1045
1046     if (!mxf->edit_units_count && !mxf->edit_unit_byte_count)
1047         return;
1048
1049     put_buffer(pb, index_table_segment_key, 16);
1050
1051     if (mxf->edit_unit_byte_count) {
1052         klv_encode_ber_length(pb, 85);
1053     } else {
1054         klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1)*6 +
1055                               12+mxf->edit_units_count*(11+mxf->slice_count*4));
1056     }
1057
1058     // instance id
1059     mxf_write_local_tag(pb, 16, 0x3C0A);
1060     mxf_write_uuid(pb, IndexTableSegment, 0);
1061
1062     // index edit rate
1063     mxf_write_local_tag(pb, 8, 0x3F0B);
1064     put_be32(pb, mxf->time_base.num);
1065     put_be32(pb, mxf->time_base.den);
1066
1067     // index start position
1068     mxf_write_local_tag(pb, 8, 0x3F0C);
1069     put_be64(pb, mxf->last_indexed_edit_unit);
1070
1071     // index duration
1072     mxf_write_local_tag(pb, 8, 0x3F0D);
1073     put_be64(pb, mxf->edit_units_count);
1074
1075     // edit unit byte count
1076     mxf_write_local_tag(pb, 4, 0x3F05);
1077     put_be32(pb, mxf->edit_unit_byte_count);
1078
1079     // index sid
1080     mxf_write_local_tag(pb, 4, 0x3F06);
1081     put_be32(pb, 2);
1082
1083     // body sid
1084     mxf_write_local_tag(pb, 4, 0x3F07);
1085     put_be32(pb, 1);
1086
1087     // real slice count - 1
1088     mxf_write_local_tag(pb, 1, 0x3F08);
1089     put_byte(pb, mxf->slice_count);
1090
1091     if (!mxf->edit_unit_byte_count) {
1092         // delta entry array
1093         mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);
1094         put_be32(pb, s->nb_streams+1); // num of entries
1095         put_be32(pb, 6);               // size of one entry
1096         // write system item delta entry
1097         put_byte(pb, 0);
1098         put_byte(pb, 0); // slice entry
1099         put_be32(pb, 0); // element delta
1100         for (i = 0; i < s->nb_streams; i++) {
1101             AVStream *st = s->streams[i];
1102             MXFStreamContext *sc = st->priv_data;
1103             put_byte(pb, sc->temporal_reordering);
1104             if (sc->temporal_reordering)
1105                 temporal_reordering = 1;
1106             if (i == 0) { // video track
1107                 put_byte(pb, 0); // slice number
1108                 put_be32(pb, KAG_SIZE); // system item size including klv fill
1109             } else { // audio track
1110                 unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;
1111                 audio_frame_size += klv_fill_size(audio_frame_size);
1112                 put_byte(pb, 1);
1113                 put_be32(pb, (i-1)*audio_frame_size); // element delta
1114             }
1115         }
1116
1117         mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);
1118         put_be32(pb, mxf->edit_units_count);  // num of entries
1119         put_be32(pb, 11+mxf->slice_count*4);  // size of one entry
1120         for (i = 0; i < mxf->edit_units_count; i++) {
1121             if (temporal_reordering) {
1122                 int temporal_offset = 0;
1123                 for (j = i+1; j < mxf->edit_units_count; j++) {
1124                     temporal_offset++;
1125                     if (mxf->index_entries[j].flags & 0x10) { // backward prediction
1126                         // next is not b, so is reordered
1127                         if (!(mxf->index_entries[i+1].flags & 0x10)) {
1128                             if ((mxf->index_entries[i].flags & 0x11) == 0) // i frame
1129                                 temporal_offset = 0;
1130                             else
1131                                 temporal_offset = -temporal_offset;
1132                         }
1133                         break;
1134                     }
1135                 }
1136                 put_byte(pb, temporal_offset);
1137             } else
1138                 put_byte(pb, 0);
1139             if (!(mxf->index_entries[i].flags & 0x33)) { // I frame
1140                 mxf->last_key_index = key_index;
1141                 key_index = i;
1142             }
1143             if (mxf->index_entries[i].flags & 0x10 && // backward prediction
1144                 !(mxf->index_entries[key_index].flags & 0x80)) { // open gop
1145                 put_byte(pb, mxf->last_key_index - i);
1146             } else {
1147                 put_byte(pb, key_index - i); // key frame offset
1148                 if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward
1149                     mxf->last_key_index = key_index;
1150             }
1151             put_byte(pb, mxf->index_entries[i].flags);
1152             // stream offset
1153             put_be64(pb, mxf->index_entries[i].offset - mxf->first_edit_unit_offset);
1154             if (s->nb_streams > 1)
1155                 put_be32(pb, mxf->index_entries[i].slice_offset);
1156         }
1157
1158         mxf->last_key_index = key_index - mxf->edit_units_count;
1159         mxf->last_indexed_edit_unit += mxf->edit_units_count;
1160         mxf->edit_units_count = 0;
1161     }
1162 }
1163
1164 static void mxf_write_klv_fill(AVFormatContext *s)
1165 {
1166     unsigned pad = klv_fill_size(url_ftell(s->pb));
1167     if (pad) {
1168         put_buffer(s->pb, klv_fill_key, 16);
1169         pad -= 16 + 4;
1170         klv_encode_ber4_length(s->pb, pad);
1171         for (; pad; pad--)
1172             put_byte(s->pb, 0);
1173         assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));
1174     }
1175 }
1176
1177 static void mxf_write_partition(AVFormatContext *s, int bodysid,
1178                                 int indexsid,
1179                                 const uint8_t *key, int write_metadata)
1180 {
1181     MXFContext *mxf = s->priv_data;
1182     ByteIOContext *pb = s->pb;
1183     int64_t header_byte_count_offset;
1184     unsigned index_byte_count = 0;
1185     uint64_t partition_offset = url_ftell(pb);
1186
1187     if (!mxf->edit_unit_byte_count && mxf->edit_units_count)
1188         index_byte_count = 85 + 12+(s->nb_streams+1)*6 +
1189             12+mxf->edit_units_count*(11+mxf->slice_count*4);
1190     else if (mxf->edit_unit_byte_count && indexsid)
1191         index_byte_count = 85;
1192
1193     if (index_byte_count) {
1194         // add encoded ber length
1195         index_byte_count += 16 + klv_ber_length(index_byte_count);
1196         index_byte_count += klv_fill_size(index_byte_count);
1197     }
1198
1199     if (!memcmp(key, body_partition_key, 16)) {
1200         mxf->body_partition_offset =
1201             av_realloc(mxf->body_partition_offset,
1202                        (mxf->body_partitions_count+1)*
1203                        sizeof(*mxf->body_partition_offset));
1204         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;
1205     }
1206
1207     // write klv
1208     put_buffer(pb, key, 16);
1209     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);
1210
1211     // write partition value
1212     put_be16(pb, 1); // majorVersion
1213     put_be16(pb, 2); // minorVersion
1214     put_be32(pb, KAG_SIZE); // KAGSize
1215
1216     put_be64(pb, partition_offset); // ThisPartition
1217
1218     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)
1219         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition
1220     else if (!memcmp(key, footer_partition_key, 16) && mxf->body_partitions_count)
1221         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition
1222     else
1223         put_be64(pb, 0);
1224
1225     put_be64(pb, mxf->footer_partition_offset); // footerPartition
1226
1227     // set offset
1228     header_byte_count_offset = url_ftell(pb);
1229     put_be64(pb, 0); // headerByteCount, update later
1230
1231     // indexTable
1232     put_be64(pb, index_byte_count); // indexByteCount
1233     put_be32(pb, index_byte_count ? indexsid : 0); // indexSID
1234
1235     // BodyOffset
1236     if (bodysid && mxf->edit_units_count && mxf->body_partitions_count) {
1237         uint64_t partition_end = url_ftell(pb) + 8 + 4 + 16 + 8 +
1238             16*mxf->essence_container_count;
1239         put_be64(pb, partition_end + klv_fill_size(partition_end) +
1240                  index_byte_count - mxf->first_edit_unit_offset);
1241     } else
1242         put_be64(pb, 0);
1243
1244     put_be32(pb, bodysid); // bodySID
1245
1246     // operational pattern
1247     if (s->nb_streams > 1) {
1248         put_buffer(pb, op1a_ul, 14);
1249         put_be16(pb, 0x0900); // multi track
1250     } else {
1251         put_buffer(pb, op1a_ul, 16);
1252     }
1253
1254     // essence container
1255     mxf_write_essence_container_refs(s);
1256
1257     if (write_metadata) {
1258         // mark the start of the headermetadata and calculate metadata size
1259         int64_t pos, start;
1260         unsigned header_byte_count;
1261
1262         mxf_write_klv_fill(s);
1263         start = url_ftell(s->pb);
1264         mxf_write_primer_pack(s);
1265         mxf_write_header_metadata_sets(s);
1266         pos = url_ftell(s->pb);
1267         header_byte_count = pos - start + klv_fill_size(pos);
1268
1269         // update header_byte_count
1270         url_fseek(pb, header_byte_count_offset, SEEK_SET);
1271         put_be64(pb, header_byte_count);
1272         url_fseek(pb, pos, SEEK_SET);
1273     }
1274
1275     put_flush_packet(pb);
1276 }
1277
1278 static const UID mxf_mpeg2_codec_uls[] = {
1279     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame
1280     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP
1281     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame
1282     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP
1283     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame
1284     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP
1285     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame
1286     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP
1287 };
1288
1289 static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)
1290 {
1291     if (avctx->profile == 4) { // Main
1292         if (avctx->level == 8) // Main
1293             return avctx->gop_size ?
1294                 &mxf_mpeg2_codec_uls[1] :
1295                 &mxf_mpeg2_codec_uls[0];
1296         else if (avctx->level == 4) // High
1297             return avctx->gop_size ?
1298                 &mxf_mpeg2_codec_uls[5] :
1299                 &mxf_mpeg2_codec_uls[4];
1300     } else if (avctx->profile == 0) { // 422
1301         if (avctx->level == 5) // Main
1302             return avctx->gop_size ?
1303                 &mxf_mpeg2_codec_uls[3] :
1304                 &mxf_mpeg2_codec_uls[2];
1305         else if (avctx->level == 2) // High
1306             return avctx->gop_size ?
1307                 &mxf_mpeg2_codec_uls[7] :
1308                 &mxf_mpeg2_codec_uls[6];
1309     }
1310     return NULL;
1311 }
1312
1313 static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt, int *flags)
1314 {
1315     MXFStreamContext *sc = st->priv_data;
1316     MXFContext *mxf = s->priv_data;
1317     uint32_t c = -1;
1318     int i;
1319
1320     *flags = 0;
1321
1322     for(i = 0; i < pkt->size - 4; i++) {
1323         c = (c<<8) + pkt->data[i];
1324         if (c == 0x1B5) {
1325             if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
1326                 st->codec->profile = pkt->data[i+1] & 0x07;
1327                 st->codec->level   = pkt->data[i+2] >> 4;
1328             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext
1329                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame
1330                 break;
1331             }
1332         } else if (c == 0x1b8) { // gop
1333             if (i + 4 < pkt->size) {
1334                 if (pkt->data[i+4]>>6 & 0x01) // closed
1335                     *flags |= 0x80; // random access
1336                 if (!mxf->header_written) {
1337                     unsigned hours   =  (pkt->data[i+1]>>2) & 0x1f;
1338                     unsigned minutes = ((pkt->data[i+1] & 0x03) << 4) | (pkt->data[i+2]>>4);
1339                     unsigned seconds = ((pkt->data[i+2] & 0x07) << 3) | (pkt->data[i+3]>>5);
1340                     unsigned frames  = ((pkt->data[i+3] & 0x1f) << 1) | (pkt->data[i+4]>>7);
1341                     mxf->timecode_drop_frame = !!(pkt->data[i+1] & 0x80);
1342                     mxf->timecode_start = (hours*3600 + minutes*60 + seconds) *
1343                         mxf->timecode_base + frames;
1344                     if (mxf->timecode_drop_frame) {
1345                         unsigned tminutes = 60 * hours + minutes;
1346                         mxf->timecode_start -= 2 * (tminutes - tminutes / 10);
1347                     }
1348                     av_log(s, AV_LOG_DEBUG, "frame %d %d:%d:%d%c%d\n", mxf->timecode_start,
1349                            hours, minutes, seconds, mxf->timecode_drop_frame ? ';':':', frames);
1350                 }
1351             }
1352         } else if (c == 0x1b3) { // seq
1353             *flags |= 0x40;
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             mxf->essence_containers_indices[mxf->essence_container_count++] = sc->index;
1471             present[sc->index] = 1;
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 = s->nb_streams;
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         put_buffer(pb, mxf_essence_container_uls[mxf->essence_containers_indices[0]].container_ul, 16);
1553     put_byte(pb, 0);
1554     put_be64(pb, 0);
1555     put_be64(pb, 0); // creation date/time stamp
1556
1557     put_byte(pb, 0x81); // SMPTE 12M time code
1558     time_code = ff_framenum_to_12m_time_code(frame, mxf->timecode_drop_frame, mxf->timecode_base);
1559     put_be32(pb, time_code);
1560     put_be32(pb, 0); // binary group data
1561     put_be64(pb, 0);
1562
1563     // write system metadata package set
1564     put_buffer(pb, system_metadata_package_set_key, 16);
1565     klv_encode_ber4_length(pb, 35);
1566     put_byte(pb, 0x83); // UMID
1567     put_be16(pb, 0x20);
1568     mxf_write_umid(pb, SourcePackage, 0);
1569 }
1570
1571 static void mxf_write_d10_video_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
1572 {
1573     MXFContext *mxf = s->priv_data;
1574     ByteIOContext *pb = s->pb;
1575     int packet_size = (uint64_t)st->codec->bit_rate*mxf->time_base.num /
1576         (8*mxf->time_base.den); // frame size
1577     int pad;
1578
1579     packet_size += 16 + 4;
1580     packet_size += klv_fill_size(packet_size);
1581
1582     klv_encode_ber4_length(pb, pkt->size);
1583     put_buffer(pb, pkt->data, pkt->size);
1584
1585     // ensure CBR muxing by padding to correct video frame size
1586     pad = packet_size - pkt->size - 16 - 4;
1587     if (pad > 20) {
1588         put_buffer(s->pb, klv_fill_key, 16);
1589         pad -= 16 + 4;
1590         klv_encode_ber4_length(s->pb, pad);
1591         for (; pad; pad--)
1592             put_byte(s->pb, 0);
1593         assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));
1594     } else {
1595         av_log(s, AV_LOG_WARNING, "cannot fill d-10 video packet\n");
1596         for (; pad > 0; pad--)
1597             put_byte(s->pb, 0);
1598     }
1599 }
1600
1601 static void mxf_write_d10_audio_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
1602 {
1603     MXFContext *mxf = s->priv_data;
1604     ByteIOContext *pb = s->pb;
1605     int frame_size = (pkt->size<<3) /
1606         (st->codec->channels*av_get_bits_per_sample(st->codec->codec_id));
1607     uint8_t *samples = pkt->data;
1608     uint8_t *end = pkt->data + pkt->size;
1609     int i;
1610
1611     klv_encode_ber4_length(pb, 4 + frame_size*4*8);
1612
1613     put_byte(pb, (frame_size == 1920 ? 0 : (mxf->edit_units_count-1) % 5 + 1));
1614     put_le16(pb, frame_size);
1615     put_byte(pb, (1<<st->codec->channels)-1);
1616
1617     while (samples < end) {
1618         for (i = 0; i < st->codec->channels; i++) {
1619             uint32_t sample;
1620             if (st->codec->codec_id == CODEC_ID_PCM_S24LE) {
1621                 sample = (AV_RL24(samples)<< 4)|((samples==pkt->data)<<3) | i;
1622                 samples += 3;
1623             } else {
1624                 sample = (AV_RL16(samples)<<12)|((samples==pkt->data)<<3) | i;
1625                 samples += 2;
1626             }
1627             put_le32(pb, sample);
1628         }
1629         for (; i < 8; i++)
1630             put_le32(pb, 0);
1631     }
1632 }
1633
1634 static int mxf_write_d10_packet(AVFormatContext *s, AVPacket *pkt)
1635 {
1636     MXFContext *mxf = s->priv_data;
1637     ByteIOContext *pb = s->pb;
1638     AVStream *st = s->streams[pkt->stream_index];
1639     MXFStreamContext *sc = st->priv_data;
1640     int flags = 0;
1641
1642     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
1643         if (!mxf_parse_mpeg2_frame(s, st, pkt, &flags)) {
1644             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
1645             return -1;
1646         }
1647     }
1648
1649     if (!mxf->header_written) {
1650         mxf_write_partition(s, 1, 2, header_open_partition_key, 1);
1651         mxf->header_written = 1;
1652         mxf_write_klv_fill(s);
1653         mxf_write_index_table_segment(s);
1654     }
1655
1656     if (st->index == 0) {
1657         mxf_write_klv_fill(s);
1658         mxf_write_system_item(s);
1659
1660         mxf->edit_units_count++;
1661     }
1662
1663     mxf_write_klv_fill(s);
1664     put_buffer(pb, sc->track_essence_element_key, 16); // write key
1665     if (st->codec->codec_type == CODEC_TYPE_VIDEO)
1666         mxf_write_d10_video_packet(s, st, pkt);
1667     else
1668         mxf_write_d10_audio_packet(s, st, pkt);
1669
1670     put_flush_packet(pb);
1671
1672     return 0;
1673 }
1674
1675 static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
1676 {
1677     MXFContext *mxf = s->priv_data;
1678     ByteIOContext *pb = s->pb;
1679     AVStream *st = s->streams[pkt->stream_index];
1680     MXFStreamContext *sc = st->priv_data;
1681     int flags = 0;
1682
1683     if (!(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {
1684         mxf->index_entries = av_realloc(mxf->index_entries,
1685             (mxf->edit_units_count + EDIT_UNITS_PER_BODY)*sizeof(*mxf->index_entries));
1686         if (!mxf->index_entries) {
1687             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");
1688             return -1;
1689         }
1690     }
1691
1692     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
1693         if (!mxf_parse_mpeg2_frame(s, st, pkt, &flags)) {
1694             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
1695             return -1;
1696         }
1697     }
1698
1699     if (!mxf->header_written) {
1700         mxf_write_partition(s, 0, 0, header_open_partition_key, 1);
1701         mxf->header_written = 1;
1702     }
1703
1704     if (st->index == 0) {
1705         if ((!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&
1706             !(flags & 0x33)) { // I frame, Gop start
1707             mxf_write_klv_fill(s);
1708             mxf_write_partition(s, 1, 2, body_partition_key, 0);
1709
1710             mxf_write_klv_fill(s);
1711             mxf_write_index_table_segment(s);
1712         }
1713
1714         mxf_write_klv_fill(s);
1715         mxf->index_entries[mxf->edit_units_count].offset = url_ftell(pb);
1716         mxf->index_entries[mxf->edit_units_count].flags = flags;
1717         if (!mxf->first_edit_unit_offset)
1718             mxf->first_edit_unit_offset = mxf->index_entries[0].offset;
1719         mxf_write_system_item(s);
1720
1721         mxf->edit_units_count++;
1722     } else if (st->index == 1) {
1723         mxf->index_entries[mxf->edit_units_count-1].slice_offset =
1724             url_ftell(pb) - mxf->index_entries[mxf->edit_units_count-1].offset;
1725     }
1726
1727     mxf_write_klv_fill(s);
1728     put_buffer(pb, sc->track_essence_element_key, 16); // write key
1729     klv_encode_ber4_length(pb, pkt->size); // write length
1730     put_buffer(pb, pkt->data, pkt->size); // write value
1731
1732     put_flush_packet(pb);
1733     return 0;
1734 }
1735
1736 static void mxf_write_random_index_pack(AVFormatContext *s)
1737 {
1738     MXFContext *mxf = s->priv_data;
1739     ByteIOContext *pb = s->pb;
1740     uint64_t pos = url_ftell(pb);
1741     int i;
1742
1743     put_buffer(pb, random_index_pack_key, 16);
1744     klv_encode_ber_length(pb, 28 + 12*mxf->body_partitions_count);
1745
1746     put_be32(pb, 0); // BodySID of header partition
1747     put_be64(pb, 0); // offset of header partition
1748
1749     for (i = 0; i < mxf->body_partitions_count; i++) {
1750         put_be32(pb, 1); // BodySID
1751         put_be64(pb, mxf->body_partition_offset[i]);
1752     }
1753
1754     put_be32(pb, 0); // BodySID of footer partition
1755     put_be64(pb, mxf->footer_partition_offset);
1756
1757     put_be32(pb, url_ftell(pb) - pos + 4);
1758 }
1759
1760 static int mxf_write_footer(AVFormatContext *s)
1761 {
1762     MXFContext *mxf = s->priv_data;
1763     ByteIOContext *pb = s->pb;
1764
1765     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;
1766
1767     mxf_write_klv_fill(s);
1768     mxf->footer_partition_offset = url_ftell(pb);
1769     if (mxf->edit_unit_byte_count) { // no need to repeat index
1770         mxf_write_partition(s, 0, 0, footer_partition_key, 0);
1771     } else {
1772         mxf_write_partition(s, 0, 2, footer_partition_key, 0);
1773
1774         mxf_write_klv_fill(s);
1775         mxf_write_index_table_segment(s);
1776     }
1777
1778     mxf_write_klv_fill(s);
1779     mxf_write_random_index_pack(s);
1780
1781     if (!url_is_streamed(s->pb)) {
1782         int index;
1783         url_fseek(pb, 0, SEEK_SET);
1784         if (s->oformat == &mxf_d10_muxer) {
1785             mxf_write_partition(s, 1, 2, header_closed_partition_key, 1);
1786             index = 1;
1787         } else if (mxf->edit_unit_byte_count) {
1788             mxf_write_partition(s, 0, 2, header_closed_partition_key, 1);
1789             index = 1;
1790         } else {
1791             mxf_write_partition(s, 0, 0, header_closed_partition_key, 1);
1792             index = 0;
1793         }
1794         if (index) {
1795             mxf_write_klv_fill(s);
1796             mxf_write_index_table_segment(s);
1797         }
1798     }
1799
1800     ff_audio_interleave_close(s);
1801
1802     av_freep(&mxf->index_entries);
1803     av_freep(&mxf->body_partition_offset);
1804     av_freep(&mxf->timecode_track->priv_data);
1805     av_freep(&mxf->timecode_track);
1806
1807     mxf_free(s);
1808
1809     return 0;
1810 }
1811
1812 static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1813 {
1814     AVPacketList *pktl;
1815     int stream_count = 0;
1816     int streams[MAX_STREAMS];
1817
1818     memset(streams, 0, sizeof(streams));
1819     pktl = s->packet_buffer;
1820     while (pktl) {
1821         //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);
1822         if (!streams[pktl->pkt.stream_index])
1823             stream_count++;
1824         streams[pktl->pkt.stream_index]++;
1825         pktl = pktl->next;
1826     }
1827
1828     if (stream_count && (s->nb_streams == stream_count || flush)) {
1829         pktl = s->packet_buffer;
1830         if (s->nb_streams != stream_count) {
1831             AVPacketList *first = NULL;
1832             AVPacketList *last = NULL;
1833             // find first packet in edit unit
1834             while (pktl) {
1835                 AVStream *st = s->streams[pktl->pkt.stream_index];
1836                 if (st->index == 0)
1837                     break;
1838                 else if (!first)
1839                     first = pktl;
1840                 last = pktl;
1841                 pktl = pktl->next;
1842             }
1843             if (last)
1844                 last->next = NULL;
1845             // purge packet queue
1846             while (pktl) {
1847                 AVPacketList *next = pktl->next;
1848                 av_free_packet(&pktl->pkt);
1849                 av_freep(&pktl);
1850                 pktl = next;
1851             }
1852             if (!first)
1853                 goto out;
1854             pktl = first;
1855         }
1856
1857         *out = pktl->pkt;
1858         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);
1859         s->packet_buffer = pktl->next;
1860         av_freep(&pktl);
1861         return 1;
1862     } else {
1863     out:
1864         av_init_packet(out);
1865         return 0;
1866     }
1867 }
1868
1869 static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
1870 {
1871     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;
1872     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;
1873
1874     return next->dts > pkt->dts ||
1875         (next->dts == pkt->dts && sc->order < sc2->order);
1876 }
1877
1878 static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1879 {
1880     return ff_audio_rechunk_interleave(s, out, pkt, flush,
1881                                mxf_interleave_get_packet, mxf_compare_timestamps);
1882 }
1883
1884 AVOutputFormat mxf_muxer = {
1885     "mxf",
1886     NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1887     NULL,
1888     "mxf",
1889     sizeof(MXFContext),
1890     CODEC_ID_PCM_S16LE,
1891     CODEC_ID_MPEG2VIDEO,
1892     mxf_write_header,
1893     mxf_write_packet,
1894     mxf_write_footer,
1895     AVFMT_NOTIMESTAMPS,
1896     NULL,
1897     mxf_interleave,
1898 };
1899
1900 AVOutputFormat mxf_d10_muxer = {
1901     "mxf_d10",
1902     NULL_IF_CONFIG_SMALL("Material eXchange Format, D-10 Mapping"),
1903     "application/mxf",
1904     NULL,
1905     sizeof(MXFContext),
1906     CODEC_ID_PCM_S16LE,
1907     CODEC_ID_MPEG2VIDEO,
1908     mxf_write_header,
1909     mxf_write_d10_packet,
1910     mxf_write_footer,
1911     AVFMT_NOTIMESTAMPS,
1912     NULL,
1913     mxf_interleave,
1914 };