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 #define EDIT_UNITS_PER_BODY 250
  48 #define KAG_SIZE 512
  49
  50 typedef struct {
  51     int local_tag;
  52     UID uid;
  53 } MXFLocalTagPair;
  54
  55 typedef struct {
  56     uint8_t flags;
  57     uint64_t offset;
  58     unsigned slice_offset; ///< offset of audio slice
  59 } MXFIndexEntry;
  60
  61 typedef struct {
  62     AudioInterleaveContext aic;
  63     UID track_essence_element_key;
  64     int index;            ///< index in mxf_essence_container_uls table
  65     const UID *codec_ul;
  66     int64_t duration;
  67     int order;            ///< interleaving order if dts are equal
  68     int interlaced;       ///< wether picture is interlaced
  69     int temporal_reordering;
  70 } MXFStreamContext;
  71
  72 typedef struct {
  73     UID container_ul;
  74     UID element_ul;
  75     UID codec_ul;
  76     void (*write_desc)();
  77 } MXFContainerEssenceEntry;
  78
  79 static const struct {
  80     enum CodecID id;
  81     int index;
  82 } mxf_essence_mappings[] = {
  83     { CODEC_ID_MPEG2VIDEO, 0 },
  84     { CODEC_ID_PCM_S24LE,  1 },
  85     { CODEC_ID_PCM_S16LE,  1 },
  86     { 0 }
  87 };
  88
  89 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st);
  90 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st);
  91 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st);
  92
  93 static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {
  94     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },
  95       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },
  96       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },
  97       mxf_write_mpegvideo_desc },
  98     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },
  99       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },
 100       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 101       mxf_write_aes3_desc },
 102     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },
 103       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },
 104       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 105       mxf_write_wav_desc },
 106     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
 107       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
 108       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
 109       NULL },
 110 };
 111
 112 typedef struct MXFContext {
 113     int64_t footer_partition_offset;
 114     int essence_container_count;
 115     uint8_t essence_containers_indices[FF_ARRAY_ELEMS(mxf_essence_container_uls)];
 116     AVRational time_base;
 117     int header_written;
 118     MXFIndexEntry *index_entries;
 119     unsigned edit_units_count;
 120     uint64_t timestamp;   ///< timestamp, as year(16),month(8),day(8),hour(8),minutes(8),msec/4(8)
 121     uint8_t slice_count;  ///< index slice count minus 1 (1 if no audio, 0 otherwise)
 122     int last_indexed_edit_unit;
 123     uint64_t first_edit_unit_offset;
 124     uint64_t *body_partition_offset;
 125     unsigned body_partitions_count;
 126     int last_key_index;  ///< index of last key frame
 127     uint64_t body_offset;
 128 } MXFContext;
 129
 130 static const uint8_t uuid_base[]            = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };
 131 static const uint8_t umid_base[]            = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x01,0x0D,0x00,0x13,0x00,0x00,0x00 };
 132
 133 /**
 134  * complete key for operation pattern, partitions, and primer pack
 135  */
 136 static const uint8_t op1a_ul[]                     = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x01,0x00 };
 137 static const uint8_t footer_partition_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }; // ClosedComplete
 138 static const uint8_t primer_pack_key[]             = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x05,0x01,0x00 };
 139 static const uint8_t index_table_segment_key[]     = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 };
 140 static const uint8_t random_index_pack_key[]       = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
 141 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
 142 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
 143 static const uint8_t klv_fill_key[]                = { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x03,0x01,0x02,0x10,0x01,0x00,0x00,0x00 };
 144 static const uint8_t body_partition_key[]          = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }; // ClosedComplete
 145
 146 /**
 147  * partial key for header metadata
 148  */
 149 static const uint8_t header_metadata_key[]  = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01 };
 150 static const uint8_t multiple_desc_ul[]     = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x0D,0x01,0x03,0x01,0x02,0x7F,0x01,0x00 };
 151
 152 /**
 153  * SMPTE RP210 http://www.smpte-ra.org/mdd/index.html
 154  */
 155 static const MXFLocalTagPair mxf_local_tag_batch[] = {
 156     // preface set
 157     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */
 158     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */
 159     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */
 160     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */
 161     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */
 162     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */
 163     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */
 164     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */
 165     // Identification
 166     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */
 167     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */
 168     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */
 169     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */
 170     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */
 171     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */
 172     // Content Storage
 173     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */
 174     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */
 175     // Essence Container Data
 176     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */
 177     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */
 178     // Package
 179     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */
 180     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */
 181     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */
 182     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */
 183     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */
 184     // Track
 185     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */
 186     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */
 187     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */
 188     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */
 189     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */
 190     // Sequence
 191     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */
 192     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */
 193     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */
 194     // Source Clip
 195     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */
 196     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */
 197     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */
 198     // File Descriptor
 199     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */
 200     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */
 201     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */
 202     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */
 203     // Generic Picture Essence Descriptor
 204     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */
 205     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */
 206     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */
 207     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */
 208     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */
 209     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */
 210     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */
 211     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */
 212     // CDCI Picture Essence Descriptor
 213     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */
 214     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */
 215     // Generic Sound Essence Descriptor
 216     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */
 217     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */
 218     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */
 219     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */
 220     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */
 221     // Index Table Segment
 222     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */
 223     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */
 224     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */
 225     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */
 226     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */
 227     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */
 228     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */
 229     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */
 230     // MPEG video Descriptor
 231     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */
 232     // Wave Audio Essence Descriptor
 233     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */
 234     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */
 235 };
 236
 237 static void mxf_write_uuid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
 238 {
 239     put_buffer(pb, uuid_base, 12);
 240     put_be16(pb, type);
 241     put_be16(pb, value);
 242 }
 243
 244 static void mxf_write_umid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
 245 {
 246     put_buffer(pb, umid_base, 16);
 247     mxf_write_uuid(pb, type, value);
 248 }
 249
 250 static void mxf_write_refs_count(ByteIOContext *pb, int ref_count)
 251 {
 252     put_be32(pb, ref_count);
 253     put_be32(pb, 16);
 254 }
 255
 256 static int klv_ber_length(uint64_t len)
 257 {
 258     if (len < 128)
 259         return 1;
 260     else
 261         return (av_log2(len) >> 3) + 2;
 262 }
 263
 264 static int klv_encode_ber_length(ByteIOContext *pb, uint64_t len)
 265 {
 266     // Determine the best BER size
 267     int size;
 268     if (len < 128) {
 269         //short form
 270         put_byte(pb, len);
 271         return 1;
 272     }
 273
 274     size = (av_log2(len) >> 3) + 1;
 275
 276     // long form
 277     put_byte(pb, 0x80 + size);
 278     while(size) {
 279         size--;
 280         put_byte(pb, len >> 8 * size & 0xff);
 281     }
 282     return 0;
 283 }
 284
 285 /*
 286  * Get essence container ul index
 287  */
 288 static int mxf_get_essence_container_ul_index(enum CodecID id)
 289 {
 290     int i;
 291     for (i = 0; mxf_essence_mappings[i].id; i++)
 292         if (mxf_essence_mappings[i].id == id)
 293             return mxf_essence_mappings[i].index;
 294     return -1;
 295 }
 296
 297 static void mxf_write_primer_pack(AVFormatContext *s)
 298 {
 299     ByteIOContext *pb = s->pb;
 300     int local_tag_number, i = 0;
 301
 302     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);
 303
 304     put_buffer(pb, primer_pack_key, 16);
 305     klv_encode_ber_length(pb, local_tag_number * 18 + 8);
 306
 307     put_be32(pb, local_tag_number); // local_tag num
 308     put_be32(pb, 18); // item size, always 18 according to the specs
 309
 310     for (i = 0; i < local_tag_number; i++) {
 311         put_be16(pb, mxf_local_tag_batch[i].local_tag);
 312         put_buffer(pb, mxf_local_tag_batch[i].uid, 16);
 313     }
 314 }
 315
 316 static void mxf_write_local_tag(ByteIOContext *pb, int size, int tag)
 317 {
 318     put_be16(pb, tag);
 319     put_be16(pb, size);
 320 }
 321
 322 static void mxf_write_metadata_key(ByteIOContext *pb, unsigned int value)
 323 {
 324     put_buffer(pb, header_metadata_key, 13);
 325     put_be24(pb, value);
 326 }
 327
 328 static void mxf_free(AVFormatContext *s)
 329 {
 330     int i;
 331
 332     for (i = 0; i < s->nb_streams; i++) {
 333         AVStream *st = s->streams[i];
 334         av_freep(&st->priv_data);
 335     }
 336 }
 337
 338 static const MXFCodecUL *mxf_get_data_definition_ul(int type)
 339 {
 340     const MXFCodecUL *uls = ff_mxf_data_definition_uls;
 341     while (uls->uid[0]) {
 342         if (type == uls->id)
 343             break;
 344         uls++;
 345     }
 346     return uls;
 347 }
 348
 349 static void mxf_write_essence_container_refs(AVFormatContext *s)
 350 {
 351     MXFContext *c = s->priv_data;
 352     ByteIOContext *pb = s->pb;
 353     int i;
 354
 355     mxf_write_refs_count(pb, c->essence_container_count);
 356     av_log(s,AV_LOG_DEBUG, "essence container count:%d\n", c->essence_container_count);
 357     for (i = 0; i < c->essence_container_count; i++) {
 358         put_buffer(pb, mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul, 16);
 359         PRINT_KEY(s, "essence container ul:\n", mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul);
 360     }
 361 }
 362
 363 static void mxf_write_preface(AVFormatContext *s)
 364 {
 365     MXFContext *mxf = s->priv_data;
 366     ByteIOContext *pb = s->pb;
 367
 368     mxf_write_metadata_key(pb, 0x012f00);
 369     PRINT_KEY(s, "preface key", pb->buf_ptr - 16);
 370     klv_encode_ber_length(pb, 130 + 16 * mxf->essence_container_count);
 371
 372     // write preface set uid
 373     mxf_write_local_tag(pb, 16, 0x3C0A);
 374     mxf_write_uuid(pb, Preface, 0);
 375     PRINT_KEY(s, "preface uid", pb->buf_ptr - 16);
 376
 377     // last modified date
 378     mxf_write_local_tag(pb, 8, 0x3B02);
 379     put_be64(pb, mxf->timestamp);
 380
 381     // write version
 382     mxf_write_local_tag(pb, 2, 0x3B05);
 383     put_be16(pb, 1);
 384
 385     // write identification_refs
 386     mxf_write_local_tag(pb, 16 + 8, 0x3B06);
 387     mxf_write_refs_count(pb, 1);
 388     mxf_write_uuid(pb, Identification, 0);
 389
 390     // write content_storage_refs
 391     mxf_write_local_tag(pb, 16, 0x3B03);
 392     mxf_write_uuid(pb, ContentStorage, 0);
 393
 394     // operational pattern
 395     mxf_write_local_tag(pb, 16, 0x3B09);
 396     if (s->nb_streams > 1) {
 397         put_buffer(pb, op1a_ul, 14);
 398         put_be16(pb, 0x0900); // multi track
 399     } else {
 400         put_buffer(pb, op1a_ul, 16);
 401     }
 402
 403     // write essence_container_refs
 404     mxf_write_local_tag(pb, 8 + 16 * mxf->essence_container_count, 0x3B0A);
 405     mxf_write_essence_container_refs(s);
 406
 407     // write dm_scheme_refs
 408     mxf_write_local_tag(pb, 8, 0x3B0B);
 409     put_be64(pb, 0);
 410 }
 411
 412 /*
 413  * Write a local tag containing an ascii string as utf-16
 414  */
 415 static void mxf_write_local_tag_utf16(ByteIOContext *pb, int tag, const char *value)
 416 {
 417     int i, size = strlen(value);
 418     mxf_write_local_tag(pb, size*2, tag);
 419     for (i = 0; i < size; i++)
 420         put_be16(pb, value[i]);
 421 }
 422
 423 static void mxf_write_identification(AVFormatContext *s)
 424 {
 425     MXFContext *mxf = s->priv_data;
 426     ByteIOContext *pb = s->pb;
 427     const char *company = "FFmpeg";
 428     const char *product = "OP1a Muxer";
 429     const char *version;
 430     int length;
 431
 432     mxf_write_metadata_key(pb, 0x013000);
 433     PRINT_KEY(s, "identification key", pb->buf_ptr - 16);
 434
 435     version = s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT ?
 436         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);
 437     length = 84 + (strlen(company)+strlen(product)+strlen(version))*2; // utf-16
 438     klv_encode_ber_length(pb, length);
 439
 440     // write uid
 441     mxf_write_local_tag(pb, 16, 0x3C0A);
 442     mxf_write_uuid(pb, Identification, 0);
 443     PRINT_KEY(s, "identification uid", pb->buf_ptr - 16);
 444
 445     // write generation uid
 446     mxf_write_local_tag(pb, 16, 0x3C09);
 447     mxf_write_uuid(pb, Identification, 1);
 448
 449     mxf_write_local_tag_utf16(pb, 0x3C01, company); // Company Name
 450     mxf_write_local_tag_utf16(pb, 0x3C02, product); // Product Name
 451     mxf_write_local_tag_utf16(pb, 0x3C04, version); // Version String
 452
 453     // write product uid
 454     mxf_write_local_tag(pb, 16, 0x3C05);
 455     mxf_write_uuid(pb, Identification, 2);
 456
 457     // modification date
 458     mxf_write_local_tag(pb, 8, 0x3C06);
 459     put_be64(pb, mxf->timestamp);
 460 }
 461
 462 static void mxf_write_content_storage(AVFormatContext *s)
 463 {
 464     ByteIOContext *pb = s->pb;
 465
 466     mxf_write_metadata_key(pb, 0x011800);
 467     PRINT_KEY(s, "content storage key", pb->buf_ptr - 16);
 468     klv_encode_ber_length(pb, 92);
 469
 470     // write uid
 471     mxf_write_local_tag(pb, 16, 0x3C0A);
 472     mxf_write_uuid(pb, ContentStorage, 0);
 473     PRINT_KEY(s, "content storage uid", pb->buf_ptr - 16);
 474
 475     // write package reference
 476     mxf_write_local_tag(pb, 16 * 2 + 8, 0x1901);
 477     mxf_write_refs_count(pb, 2);
 478     mxf_write_uuid(pb, MaterialPackage, 0);
 479     mxf_write_uuid(pb, SourcePackage, 0);
 480
 481     // write essence container data
 482     mxf_write_local_tag(pb, 8 + 16, 0x1902);
 483     mxf_write_refs_count(pb, 1);
 484     mxf_write_uuid(pb, EssenceContainerData, 0);
 485 }
 486
 487 static void mxf_write_track(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 488 {
 489     MXFContext *mxf = s->priv_data;
 490     ByteIOContext *pb = s->pb;
 491     MXFStreamContext *sc = st->priv_data;
 492
 493     mxf_write_metadata_key(pb, 0x013b00);
 494     PRINT_KEY(s, "track key", pb->buf_ptr - 16);
 495     klv_encode_ber_length(pb, 80);
 496
 497     // write track uid
 498     mxf_write_local_tag(pb, 16, 0x3C0A);
 499     mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, st->index);
 500     PRINT_KEY(s, "track uid", pb->buf_ptr - 16);
 501
 502     // write track id
 503     mxf_write_local_tag(pb, 4, 0x4801);
 504     put_be32(pb, st->index);
 505
 506     // write track number
 507     mxf_write_local_tag(pb, 4, 0x4804);
 508     if (type == MaterialPackage)
 509         put_be32(pb, 0); // track number of material package is 0
 510     else
 511         put_buffer(pb, sc->track_essence_element_key + 12, 4);
 512
 513     mxf_write_local_tag(pb, 8, 0x4B01);
 514     put_be32(pb, mxf->time_base.den);
 515     put_be32(pb, mxf->time_base.num);
 516
 517     // write origin
 518     mxf_write_local_tag(pb, 8, 0x4B02);
 519     put_be64(pb, 0);
 520
 521     // write sequence refs
 522     mxf_write_local_tag(pb, 16, 0x4803);
 523     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 524 }
 525
 526 static void mxf_write_common_fields(ByteIOContext *pb, AVStream *st)
 527 {
 528     const MXFCodecUL *data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);
 529     MXFStreamContext *sc = st->priv_data;
 530
 531     // find data define uls
 532     mxf_write_local_tag(pb, 16, 0x0201);
 533     put_buffer(pb, data_def_ul->uid, 16);
 534
 535     // write duration
 536     mxf_write_local_tag(pb, 8, 0x0202);
 537     put_be64(pb, sc->duration);
 538 }
 539
 540 static void mxf_write_sequence(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 541 {
 542     ByteIOContext *pb = s->pb;
 543
 544     mxf_write_metadata_key(pb, 0x010f00);
 545     PRINT_KEY(s, "sequence key", pb->buf_ptr - 16);
 546     klv_encode_ber_length(pb, 80);
 547
 548     mxf_write_local_tag(pb, 16, 0x3C0A);
 549     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 550
 551     PRINT_KEY(s, "sequence uid", pb->buf_ptr - 16);
 552     mxf_write_common_fields(pb, st);
 553
 554     // write structural component
 555     mxf_write_local_tag(pb, 16 + 8, 0x1001);
 556     mxf_write_refs_count(pb, 1);
 557     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
 558 }
 559
 560 static void mxf_write_structural_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 561 {
 562     ByteIOContext *pb = s->pb;
 563     int i;
 564
 565     mxf_write_metadata_key(pb, 0x011100);
 566     PRINT_KEY(s, "sturctural component key", pb->buf_ptr - 16);
 567     klv_encode_ber_length(pb, 108);
 568
 569     // write uid
 570     mxf_write_local_tag(pb, 16, 0x3C0A);
 571     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
 572
 573     PRINT_KEY(s, "structural component uid", pb->buf_ptr - 16);
 574     mxf_write_common_fields(pb, st);
 575
 576     // write start_position
 577     mxf_write_local_tag(pb, 8, 0x1201);
 578     put_be64(pb, 0);
 579
 580     // write source package uid, end of the reference
 581     mxf_write_local_tag(pb, 32, 0x1101);
 582     if (type == SourcePackage) {
 583         for (i = 0; i < 4; i++)
 584             put_be64(pb, 0);
 585     } else
 586         mxf_write_umid(pb, SourcePackage, 0);
 587
 588     // write source track id
 589     mxf_write_local_tag(pb, 4, 0x1102);
 590     if (type == SourcePackage)
 591         put_be32(pb, 0);
 592     else
 593         put_be32(pb, st->index);
 594 }
 595
 596 static void mxf_write_multi_descriptor(AVFormatContext *s)
 597 {
 598     MXFContext *mxf = s->priv_data;
 599     ByteIOContext *pb = s->pb;
 600     int i;
 601
 602     mxf_write_metadata_key(pb, 0x014400);
 603     PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);
 604     klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);
 605
 606     mxf_write_local_tag(pb, 16, 0x3C0A);
 607     mxf_write_uuid(pb, MultipleDescriptor, 0);
 608     PRINT_KEY(s, "multi_desc uid", pb->buf_ptr - 16);
 609
 610     // write sample rate
 611     mxf_write_local_tag(pb, 8, 0x3001);
 612     put_be32(pb, mxf->time_base.den);
 613     put_be32(pb, mxf->time_base.num);
 614
 615     // write essence container ul
 616     mxf_write_local_tag(pb, 16, 0x3004);
 617     put_buffer(pb, multiple_desc_ul, 16);
 618
 619     // write sub descriptor refs
 620     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x3F01);
 621     mxf_write_refs_count(pb, s->nb_streams);
 622     for (i = 0; i < s->nb_streams; i++)
 623         mxf_write_uuid(pb, SubDescriptor, i);
 624 }
 625
 626 static void mxf_write_generic_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 627 {
 628     MXFContext *mxf = s->priv_data;
 629     MXFStreamContext *sc = st->priv_data;
 630     ByteIOContext *pb = s->pb;
 631
 632     put_buffer(pb, key, 16);
 633     klv_encode_ber_length(pb, size);
 634
 635     mxf_write_local_tag(pb, 16, 0x3C0A);
 636     mxf_write_uuid(pb, SubDescriptor, st->index);
 637
 638     mxf_write_local_tag(pb, 4, 0x3006);
 639     put_be32(pb, st->index);
 640
 641     mxf_write_local_tag(pb, 8, 0x3001);
 642     put_be32(pb, mxf->time_base.den);
 643     put_be32(pb, mxf->time_base.num);
 644
 645     mxf_write_local_tag(pb, 16, 0x3004);
 646     put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
 647 }
 648
 649 static const UID mxf_mpegvideo_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 };
 650 static const UID mxf_wav_descriptor_key       = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 };
 651 static const UID mxf_aes3_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 };
 652
 653 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
 654 {
 655     MXFStreamContext *sc = st->priv_data;
 656     ByteIOContext *pb = s->pb;
 657     int stored_height = (st->codec->height+15)/16*16;
 658     AVRational dar;
 659     int f1, f2;
 660
 661     mxf_write_generic_desc(s, st, mxf_mpegvideo_descriptor_key, 169+sc->interlaced*4);
 662
 663     mxf_write_local_tag(pb, 4, 0x3203);
 664     put_be32(pb, st->codec->width);
 665
 666     mxf_write_local_tag(pb, 4, 0x3202);
 667     put_be32(pb, stored_height>>sc->interlaced);
 668
 669     mxf_write_local_tag(pb, 4, 0x3209);
 670     put_be32(pb, st->codec->width);
 671
 672     mxf_write_local_tag(pb, 4, 0x3208);
 673     put_be32(pb, st->codec->height>>sc->interlaced);
 674
 675     // component depth
 676     mxf_write_local_tag(pb, 4, 0x3301);
 677     put_be32(pb, 8);
 678
 679     // horizontal subsampling
 680     mxf_write_local_tag(pb, 4, 0x3302);
 681     put_be32(pb, 2);
 682
 683     // bit rate
 684     mxf_write_local_tag(pb, 4, 0x8000);
 685     put_be32(pb, st->codec->bit_rate);
 686
 687     // frame layout
 688     mxf_write_local_tag(pb, 1, 0x320C);
 689     put_byte(pb, sc->interlaced);
 690
 691     // video line map
 692     switch (st->codec->height) {
 693     case  576: f1 = 23; f2 = 336; break;
 694     case  608: f1 =  7; f2 = 320; break;
 695     case  480: f1 = 20; f2 = 283; break;
 696     case  512: f1 =  7; f2 = 270; break;
 697     case  720: f1 = 26; f2 =   0; break; // progressive
 698     case 1080: f1 = 21; f2 = 584; break;
 699     default:   f1 =  0; f2 =   0; break;
 700     }
 701
 702     if (!sc->interlaced) {
 703         f2  = 0;
 704         f1 *= 2;
 705     }
 706
 707     mxf_write_local_tag(pb, 12+sc->interlaced*4, 0x320D);
 708     put_be32(pb, sc->interlaced ? 2 : 1);
 709     put_be32(pb, 4);
 710     put_be32(pb, f1);
 711     if (sc->interlaced)
 712         put_be32(pb, f2);
 713
 714     av_reduce(&dar.num, &dar.den,
 715               st->codec->width*st->codec->sample_aspect_ratio.num,
 716               st->codec->height*st->codec->sample_aspect_ratio.den,
 717               1024*1024);
 718
 719     mxf_write_local_tag(pb, 8, 0x320E);
 720     put_be32(pb, dar.num);
 721     put_be32(pb, dar.den);
 722
 723     mxf_write_local_tag(pb, 16, 0x3201);
 724     put_buffer(pb, *sc->codec_ul, 16);
 725 }
 726
 727 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 728 {
 729     ByteIOContext *pb = s->pb;
 730
 731     mxf_write_generic_desc(s, st, key, size);
 732
 733     // audio locked
 734     mxf_write_local_tag(pb, 1, 0x3D02);
 735     put_byte(pb, 1);
 736
 737     // write audio sampling rate
 738     mxf_write_local_tag(pb, 8, 0x3D03);
 739     put_be32(pb, st->codec->sample_rate);
 740     put_be32(pb, 1);
 741
 742     mxf_write_local_tag(pb, 4, 0x3D07);
 743     put_be32(pb, st->codec->channels);
 744
 745     mxf_write_local_tag(pb, 4, 0x3D01);
 746     put_be32(pb, av_get_bits_per_sample(st->codec->codec_id));
 747 }
 748
 749 static void mxf_write_wav_common_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 750 {
 751     ByteIOContext *pb = s->pb;
 752
 753     mxf_write_generic_sound_desc(s, st, key, size);
 754
 755     mxf_write_local_tag(pb, 2, 0x3D0A);
 756     put_be16(pb, st->codec->block_align);
 757
 758     // avg bytes per sec
 759     mxf_write_local_tag(pb, 4, 0x3D09);
 760     put_be32(pb, st->codec->block_align*st->codec->sample_rate);
 761 }
 762
 763 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)
 764 {
 765     mxf_write_wav_common_desc(s, st, mxf_wav_descriptor_key, 107);
 766 }
 767
 768 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)
 769 {
 770     mxf_write_wav_common_desc(s, st, mxf_aes3_descriptor_key, 107);
 771 }
 772
 773 static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)
 774 {
 775     MXFContext *mxf = s->priv_data;
 776     ByteIOContext *pb = s->pb;
 777     int i;
 778
 779     if (type == MaterialPackage) {
 780         mxf_write_metadata_key(pb, 0x013600);
 781         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);
 782         klv_encode_ber_length(pb, 92 + 16 * s->nb_streams);
 783     } else {
 784         mxf_write_metadata_key(pb, 0x013700);
 785         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);
 786         klv_encode_ber_length(pb, 112 + 16 * s->nb_streams); // 20 bytes length for descriptor reference
 787     }
 788
 789     // write uid
 790     mxf_write_local_tag(pb, 16, 0x3C0A);
 791     mxf_write_uuid(pb, type, 0);
 792     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);
 793     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);
 794
 795     // write package umid
 796     mxf_write_local_tag(pb, 32, 0x4401);
 797     mxf_write_umid(pb, type, 0);
 798     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);
 799
 800     // package creation date
 801     mxf_write_local_tag(pb, 8, 0x4405);
 802     put_be64(pb, mxf->timestamp);
 803
 804     // package modified date
 805     mxf_write_local_tag(pb, 8, 0x4404);
 806     put_be64(pb, mxf->timestamp);
 807
 808     // write track refs
 809     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x4403);
 810     mxf_write_refs_count(pb, s->nb_streams);
 811     for (i = 0; i < s->nb_streams; i++)
 812         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);
 813
 814     // write multiple descriptor reference
 815     if (type == SourcePackage) {
 816         mxf_write_local_tag(pb, 16, 0x4701);
 817         if (s->nb_streams > 1) {
 818             mxf_write_uuid(pb, MultipleDescriptor, 0);
 819             mxf_write_multi_descriptor(s);
 820         } else
 821             mxf_write_uuid(pb, SubDescriptor, 0);
 822     }
 823
 824     for (i = 0; i < s->nb_streams; i++) {
 825         AVStream *st = s->streams[i];
 826         mxf_write_track(s, st, type);
 827         mxf_write_sequence(s, st, type);
 828         mxf_write_structural_component(s, st, type);
 829
 830         if (type == SourcePackage) {
 831             MXFStreamContext *sc = st->priv_data;
 832             mxf_essence_container_uls[sc->index].write_desc(s, st);
 833         }
 834     }
 835 }
 836
 837 static int mxf_write_essence_container_data(AVFormatContext *s)
 838 {
 839     ByteIOContext *pb = s->pb;
 840
 841     mxf_write_metadata_key(pb, 0x012300);
 842     klv_encode_ber_length(pb, 72);
 843
 844     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID
 845     mxf_write_uuid(pb, EssenceContainerData, 0);
 846
 847     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID
 848     mxf_write_umid(pb, SourcePackage, 0);
 849
 850     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID
 851     put_be32(pb, 1);
 852
 853     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID
 854     put_be32(pb, 2);
 855
 856     return 0;
 857 }
 858
 859 static int mxf_write_header_metadata_sets(AVFormatContext *s)
 860 {
 861     mxf_write_preface(s);
 862     mxf_write_identification(s);
 863     mxf_write_content_storage(s);
 864     mxf_write_package(s, MaterialPackage);
 865     mxf_write_package(s, SourcePackage);
 866     mxf_write_essence_container_data(s);
 867     return 0;
 868 }
 869
 870 static unsigned klv_fill_size(uint64_t size)
 871 {
 872     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));
 873     if (pad < 17) // smallest fill item possible
 874         return pad + KAG_SIZE;
 875     else
 876         return pad & (KAG_SIZE-1);
 877 }
 878
 879 static void mxf_write_index_table_segment(AVFormatContext *s)
 880 {
 881     MXFContext *mxf = s->priv_data;
 882     ByteIOContext *pb = s->pb;
 883     int i, j;
 884     int temporal_reordering = 0;
 885     int key_index = 0;
 886
 887     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);
 888
 889     if (!mxf->edit_units_count)
 890         return;
 891
 892     put_buffer(pb, index_table_segment_key, 16);
 893     klv_encode_ber_length(pb, 109 + (s->nb_streams+1)*6 +
 894                           mxf->edit_units_count*(11+mxf->slice_count*4));
 895
 896     // instance id
 897     mxf_write_local_tag(pb, 16, 0x3C0A);
 898     mxf_write_uuid(pb, IndexTableSegment, 0);
 899
 900     // index edit rate
 901     mxf_write_local_tag(pb, 8, 0x3F0B);
 902     put_be32(pb, mxf->time_base.num);
 903     put_be32(pb, mxf->time_base.den);
 904
 905     // index start position
 906     mxf_write_local_tag(pb, 8, 0x3F0C);
 907     put_be64(pb, mxf->last_indexed_edit_unit);
 908
 909     // index duration
 910     mxf_write_local_tag(pb, 8, 0x3F0D);
 911     put_be64(pb, mxf->edit_units_count);
 912
 913     // edit unit byte count
 914     mxf_write_local_tag(pb, 4, 0x3F05);
 915     put_be32(pb, 0);
 916
 917     // index sid
 918     mxf_write_local_tag(pb, 4, 0x3F06);
 919     put_be32(pb, 2);
 920
 921     // body sid
 922     mxf_write_local_tag(pb, 4, 0x3F07);
 923     put_be32(pb, 1);
 924
 925     // real slice count - 1
 926     mxf_write_local_tag(pb, 1, 0x3F08);
 927     put_byte(pb, mxf->slice_count);
 928
 929     // delta entry array
 930     mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);
 931     put_be32(pb, s->nb_streams+1); // num of entries
 932     put_be32(pb, 6);             // size of one entry
 933     // write system item delta entry
 934     put_byte(pb, 0);
 935     put_byte(pb, 0); // slice entry
 936     put_be32(pb, 0); // element delta
 937     for (i = 0; i < s->nb_streams; i++) {
 938         AVStream *st = s->streams[i];
 939         MXFStreamContext *sc = st->priv_data;
 940         put_byte(pb, sc->temporal_reordering);
 941         if (sc->temporal_reordering)
 942             temporal_reordering = 1;
 943         // slice number
 944         if (i == 0) { // video track
 945             put_byte(pb, 0); // slice number
 946             put_be32(pb, KAG_SIZE); // system item size including klv fill
 947         } else { // audio track
 948             unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;
 949             audio_frame_size += klv_fill_size(audio_frame_size);
 950             put_byte(pb, 1);
 951             put_be32(pb, (i-1)*audio_frame_size); // element delta
 952         }
 953     }
 954
 955     mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);
 956     put_be32(pb, mxf->edit_units_count);  // num of entries
 957     put_be32(pb, 11+mxf->slice_count*4);  // size of one entry
 958     for (i = 0; i < mxf->edit_units_count; i++) {
 959         if (temporal_reordering) {
 960             int temporal_offset = 0;
 961             for (j = i+1; j < mxf->edit_units_count; j++) {
 962                 temporal_offset++;
 963                 if (mxf->index_entries[j].flags & 0x10) { // backward prediction
 964                     // next is not b, so is reordered
 965                     if (!(mxf->index_entries[i+1].flags & 0x10)) {
 966                         if ((mxf->index_entries[i].flags & 0x11) == 0) // i frame
 967                             temporal_offset = 0;
 968                         else
 969                             temporal_offset = -temporal_offset;
 970                     }
 971                     break;
 972                 }
 973             }
 974             put_byte(pb, temporal_offset);
 975         } else
 976             put_byte(pb, 0);
 977         if (!(mxf->index_entries[i].flags & 0x33)) { // I frame
 978             mxf->last_key_index = key_index;
 979             key_index = i;
 980         }
 981         if (mxf->index_entries[i].flags & 0x10 && // backward prediction
 982             !(mxf->index_entries[key_index].flags & 0x80)) { // open gop
 983             put_byte(pb, mxf->last_key_index - i);
 984         } else {
 985             put_byte(pb, key_index - i); // key frame offset
 986             if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward
 987                 mxf->last_key_index = key_index;
 988         }
 989         put_byte(pb, mxf->index_entries[i].flags);
 990         // stream offset
 991         put_be64(pb, mxf->index_entries[i].offset - mxf->first_edit_unit_offset);
 992         if (s->nb_streams > 1)
 993             put_be32(pb, mxf->index_entries[i].slice_offset);
 994     }
 995
 996     mxf->last_indexed_edit_unit += mxf->edit_units_count;
 997     mxf->edit_units_count = 0;
 998 }
 999
1000 static void mxf_write_klv_fill(AVFormatContext *s)
1001 {
1002     unsigned pad = klv_fill_size(url_ftell(s->pb));
1003     if (pad) {
1004         put_buffer(s->pb, klv_fill_key, 16);
1005         pad -= 16;
1006         pad -= klv_ber_length(pad);
1007         klv_encode_ber_length(s->pb, pad);
1008         for (; pad > 7; pad -= 8)
1009             put_be64(s->pb, 0);
1010         for (; pad; pad--)
1011             put_byte(s->pb, 0);
1012         assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));
1013     }
1014 }
1015
1016 static void mxf_write_partition(AVFormatContext *s, int bodysid,
1017                                 int indexsid,
1018                                 const uint8_t *key, int write_metadata)
1019 {
1020     MXFContext *mxf = s->priv_data;
1021     ByteIOContext *pb = s->pb;
1022     int64_t header_byte_count_offset;
1023     unsigned index_byte_count = 0;
1024
1025     if (mxf->edit_units_count) {
1026         index_byte_count = 109 + (s->nb_streams+1)*6 +
1027             mxf->edit_units_count*(11+mxf->slice_count*4);
1028         // add encoded ber length
1029         index_byte_count += 16 + klv_ber_length(index_byte_count);
1030         index_byte_count += klv_fill_size(index_byte_count);
1031
1032         mxf->body_offset += url_ftell(pb) - mxf->index_entries[0].offset;
1033     }
1034
1035     if (!memcmp(key, body_partition_key, 16)) {
1036         mxf->body_partition_offset =
1037             av_realloc(mxf->body_partition_offset,
1038                        (mxf->body_partitions_count+1)*
1039                        sizeof(*mxf->body_partition_offset));
1040         mxf->body_partition_offset[mxf->body_partitions_count++] = url_ftell(pb);
1041     }
1042
1043     // write klv
1044     put_buffer(pb, key, 16);
1045
1046     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);
1047
1048     // write partition value
1049     put_be16(pb, 1); // majorVersion
1050     put_be16(pb, 2); // minorVersion
1051     put_be32(pb, KAG_SIZE); // KAGSize
1052
1053     put_be64(pb, url_ftell(pb) - 25); // thisPartition
1054
1055     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)
1056         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition
1057     else if (!memcmp(key, footer_partition_key, 16))
1058         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition
1059     else
1060         put_be64(pb, 0);
1061
1062     put_be64(pb, mxf->footer_partition_offset); // footerPartition
1063
1064     // set offset
1065     header_byte_count_offset = url_ftell(pb);
1066     put_be64(pb, 0); // headerByteCount, update later
1067
1068     // indexTable
1069     put_be64(pb, index_byte_count); // indexByteCount
1070     put_be32(pb, index_byte_count ? indexsid : 0); // indexSID
1071
1072     // BodyOffset
1073     if (bodysid) put_be64(pb, mxf->body_offset);
1074     else         put_be64(pb, 0);
1075
1076     put_be32(pb, bodysid); // bodySID
1077
1078     // operational pattern
1079     if (s->nb_streams > 1) {
1080         put_buffer(pb, op1a_ul, 14);
1081         put_be16(pb, 0x0900); // multi track
1082     } else {
1083         put_buffer(pb, op1a_ul, 16);
1084     }
1085
1086     // essence container
1087     mxf_write_essence_container_refs(s);
1088
1089     if (write_metadata) {
1090         // mark the start of the headermetadata and calculate metadata size
1091         int64_t pos, start;
1092         unsigned header_byte_count;
1093
1094         mxf_write_klv_fill(s);
1095         start = url_ftell(s->pb);
1096         mxf_write_primer_pack(s);
1097         mxf_write_header_metadata_sets(s);
1098         pos = url_ftell(s->pb);
1099         header_byte_count = pos - start + klv_fill_size(pos);
1100
1101         // update header_byte_count
1102         url_fseek(pb, header_byte_count_offset, SEEK_SET);
1103         put_be64(pb, header_byte_count);
1104         url_fseek(pb, pos, SEEK_SET);
1105     }
1106
1107     put_flush_packet(pb);
1108 }
1109
1110 static const UID mxf_mpeg2_codec_uls[] = {
1111     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame
1112     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP
1113     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame
1114     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP
1115     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame
1116     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP
1117     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame
1118     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP
1119 };
1120
1121 static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)
1122 {
1123     if (avctx->profile == 4) { // Main
1124         if (avctx->level == 8) // Main
1125             return avctx->gop_size ?
1126                 &mxf_mpeg2_codec_uls[1] :
1127                 &mxf_mpeg2_codec_uls[0];
1128         else if (avctx->level == 4) // High
1129             return avctx->gop_size ?
1130                 &mxf_mpeg2_codec_uls[5] :
1131                 &mxf_mpeg2_codec_uls[4];
1132     } else if (avctx->profile == 0) { // 422
1133         if (avctx->level == 5) // Main
1134             return avctx->gop_size ?
1135                 &mxf_mpeg2_codec_uls[3] :
1136                 &mxf_mpeg2_codec_uls[2];
1137         else if (avctx->level == 2) // High
1138             return avctx->gop_size ?
1139                 &mxf_mpeg2_codec_uls[7] :
1140                 &mxf_mpeg2_codec_uls[6];
1141     }
1142     return NULL;
1143 }
1144
1145 static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt, int *flags)
1146 {
1147     MXFStreamContext *sc = st->priv_data;
1148     uint32_t c = -1;
1149     int i;
1150
1151     *flags = 0;
1152
1153     for(i = 0; i < pkt->size - 4; i++) {
1154         c = (c<<8) + pkt->data[i];
1155         if (c == 0x1B5) {
1156             if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
1157                 st->codec->profile = pkt->data[i+1] & 0x07;
1158                 st->codec->level   = pkt->data[i+2] >> 4;
1159             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext
1160                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame
1161                 break;
1162             }
1163         } else if (c == 0x1b8) { // gop
1164             if (i + 4 < pkt->size && pkt->data[i+4]>>6 & 0x01) // closed
1165                 *flags |= 0x80; // random access
1166         } else if (c == 0x1b3) { // seq
1167             *flags |= 0x40;
1168         } else if (c == 0x100) { // pic
1169             int pict_type = (pkt->data[i+2]>>3) & 0x07;
1170             if (pict_type == 2) { // P frame
1171                 *flags |= 0x22;
1172                 st->codec->gop_size = 1;
1173             } else if (pict_type == 3) { // B frame
1174                 *flags |= 0x33;
1175                 sc->temporal_reordering = -1;
1176             } else if (!pict_type) {
1177                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");
1178                 return 0;
1179             }
1180         }
1181     }
1182     sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);
1183     return !!sc->codec_ul;
1184 }
1185
1186 static uint64_t mxf_parse_timestamp(time_t timestamp)
1187 {
1188     struct tm *time = localtime(&timestamp);
1189     return (uint64_t)(time->tm_year+1900) << 48 |
1190            (uint64_t)(time->tm_mon+1)     << 40 |
1191            (uint64_t) time->tm_mday       << 32 |
1192                       time->tm_hour       << 24 |
1193                       time->tm_min        << 16 |
1194                       time->tm_sec        << 8;
1195 }
1196
1197 static int mxf_write_header(AVFormatContext *s)
1198 {
1199     MXFContext *mxf = s->priv_data;
1200     int i;
1201     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};
1202     const int *samples_per_frame = NULL;
1203
1204     for (i = 0; i < s->nb_streams; i++) {
1205         AVStream *st = s->streams[i];
1206         MXFStreamContext *sc = av_mallocz(sizeof(*sc));
1207         if (!sc)
1208             return AVERROR(ENOMEM);
1209         st->priv_data = sc;
1210
1211         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
1212             if (i != 0) {
1213                 av_log(s, AV_LOG_ERROR, "video stream must be first track\n");
1214                 return -1;
1215             }
1216             if (fabs(av_q2d(st->codec->time_base) - 1/25.0) < 0.0001) {
1217                 samples_per_frame = PAL_samples_per_frame;
1218                 mxf->time_base = (AVRational){ 1, 25 };
1219             } else if (fabs(av_q2d(st->codec->time_base) - 1001/30000.0) < 0.0001) {
1220                 samples_per_frame = NTSC_samples_per_frame;
1221                 mxf->time_base = (AVRational){ 1001, 30000 };
1222             } else {
1223                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");
1224                 return -1;
1225             }
1226             av_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);
1227         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1228             if (st->codec->sample_rate != 48000) {
1229                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");
1230                 return -1;
1231             }
1232             av_set_pts_info(st, 64, 1, st->codec->sample_rate);
1233             mxf->slice_count = 1;
1234         }
1235         sc->duration = -1;
1236
1237         sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);
1238         if (sc->index == -1) {
1239             av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "
1240                    "codec not currently supported in container\n", i);
1241             return -1;
1242         }
1243
1244         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;
1245
1246         if (!present[sc->index]) {
1247             mxf->essence_containers_indices[mxf->essence_container_count++] = sc->index;
1248             present[sc->index] = 1;
1249         } else
1250             present[sc->index]++;
1251         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);
1252         sc->track_essence_element_key[15] = present[sc->index];
1253         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);
1254     }
1255
1256     for (i = 0; i < s->nb_streams; i++) {
1257         MXFStreamContext *sc = s->streams[i]->priv_data;
1258         // update element count
1259         sc->track_essence_element_key[13] = present[sc->index];
1260         sc->order = AV_RB32(sc->track_essence_element_key+12);
1261     }
1262
1263     mxf->timestamp = mxf_parse_timestamp(s->timestamp);
1264
1265     if (!samples_per_frame)
1266         samples_per_frame = PAL_samples_per_frame;
1267
1268     if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)
1269         return -1;
1270
1271     return 0;
1272 }
1273
1274 static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };
1275 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 };
1276
1277 static uint32_t ff_framenum_to_12m_time_code(unsigned frame, int drop, int fps)
1278 {
1279     return (0                                    << 31) | // color frame flag
1280            (0                                    << 30) | // drop  frame flag
1281            ( ((frame % fps) / 10)                << 28) | // tens  of frames
1282            ( ((frame % fps) % 10)                << 24) | // units of frames
1283            (0                                    << 23) | // field phase (NTSC), b0 (PAL)
1284            ((((frame / fps) % 60) / 10)          << 20) | // tens  of seconds
1285            ((((frame / fps) % 60) % 10)          << 16) | // units of seconds
1286            (0                                    << 15) | // b0 (NTSC), b2 (PAL)
1287            ((((frame / (fps * 60)) % 60) / 10)   << 12) | // tens  of minutes
1288            ((((frame / (fps * 60)) % 60) % 10)   <<  8) | // units of minutes
1289            (0                                    <<  7) | // b1
1290            (0                                    <<  6) | // b2 (NSC), field phase (PAL)
1291            ((((frame / (fps * 3600) % 24)) / 10) <<  4) | // tens  of hours
1292            (  (frame / (fps * 3600) % 24)) % 10;          // units of hours
1293 }
1294
1295 static void mxf_write_system_item(AVFormatContext *s)
1296 {
1297     MXFContext *mxf = s->priv_data;
1298     ByteIOContext *pb = s->pb;
1299     unsigned fps, frame;
1300     uint32_t time_code;
1301
1302     frame = mxf->edit_units_count;
1303
1304     // write system metadata pack
1305     put_buffer(pb, system_metadata_pack_key, 16);
1306     klv_encode_ber_length(pb, 57);
1307     put_byte(pb, 0x5c); // UL, user date/time stamp, picture and sound item present
1308     put_byte(pb, 0x04); // content package rate
1309     put_byte(pb, 0x00); // content package type
1310     put_be16(pb, 0x00); // channel handle
1311     put_be16(pb, frame); // continuity count
1312     if (mxf->essence_container_count > 1)
1313         put_buffer(pb, multiple_desc_ul, 16);
1314     else
1315         put_buffer(pb, mxf_essence_container_uls[mxf->essence_containers_indices[0]].container_ul, 16);
1316     put_byte(pb, 0);
1317     put_be64(pb, 0);
1318     put_be64(pb, 0); // creation date/time stamp
1319
1320     // XXX drop frame
1321     if (mxf->time_base.den == 30000) fps = 30;
1322     else                             fps = 25;
1323
1324     put_byte(pb, 0x81); // SMPTE 12M time code
1325     time_code = ff_framenum_to_12m_time_code(frame, 0, fps);
1326     put_be32(pb, time_code);
1327     put_be32(pb, 0); // binary group data
1328     put_be64(pb, 0);
1329
1330     // write system metadata package set
1331     put_buffer(pb, system_metadata_package_set_key, 16);
1332     klv_encode_ber_length(pb, 35);
1333     put_byte(pb, 0x83); // UMID
1334     put_be16(pb, 0x20);
1335     mxf_write_umid(pb, SourcePackage, 0);
1336 }
1337
1338 static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
1339 {
1340     MXFContext *mxf = s->priv_data;
1341     ByteIOContext *pb = s->pb;
1342     AVStream *st = s->streams[pkt->stream_index];
1343     MXFStreamContext *sc = st->priv_data;
1344     int flags = 0;
1345
1346     if (!(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {
1347         mxf->index_entries = av_realloc(mxf->index_entries,
1348             (mxf->edit_units_count + EDIT_UNITS_PER_BODY)*sizeof(*mxf->index_entries));
1349         if (!mxf->index_entries) {
1350             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");
1351             return -1;
1352         }
1353     }
1354
1355     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
1356         if (!mxf_parse_mpeg2_frame(s, st, pkt, &flags)) {
1357             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
1358             return -1;
1359         }
1360     }
1361
1362     if (!mxf->header_written) {
1363         mxf_write_partition(s, 0, 0, header_open_partition_key, 1);
1364         mxf->header_written = 1;
1365     }
1366
1367     if (st->index == 0) {
1368         if ((!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&
1369             !(flags & 0x33)) { // I frame, Gop start
1370             mxf_write_klv_fill(s);
1371             mxf_write_partition(s, 1, 2, body_partition_key, 0);
1372
1373             mxf_write_klv_fill(s);
1374             mxf_write_index_table_segment(s);
1375         }
1376
1377         mxf_write_klv_fill(s);
1378         mxf->index_entries[mxf->edit_units_count].offset = url_ftell(pb);
1379         mxf->index_entries[mxf->edit_units_count].flags = flags;
1380         if (!mxf->first_edit_unit_offset)
1381             mxf->first_edit_unit_offset = mxf->index_entries[0].offset;
1382         mxf_write_system_item(s);
1383
1384         mxf->edit_units_count++;
1385     } else if (st->index == 1) {
1386         mxf->index_entries[mxf->edit_units_count-1].slice_offset =
1387             url_ftell(pb) - mxf->index_entries[mxf->edit_units_count-1].offset;
1388     }
1389
1390     mxf_write_klv_fill(s);
1391     put_buffer(pb, sc->track_essence_element_key, 16); // write key
1392     klv_encode_ber_length(pb, pkt->size); // write length
1393     put_buffer(pb, pkt->data, pkt->size); // write value
1394
1395     sc->duration = FFMAX(pkt->pts + pkt->duration, sc->duration);
1396
1397     put_flush_packet(pb);
1398     return 0;
1399 }
1400
1401 static void mxf_write_random_index_pack(AVFormatContext *s)
1402 {
1403     MXFContext *mxf = s->priv_data;
1404     ByteIOContext *pb = s->pb;
1405     uint64_t pos = url_ftell(pb);
1406     int i;
1407
1408     put_buffer(pb, random_index_pack_key, 16);
1409     klv_encode_ber_length(pb, 28 + 12*mxf->body_partitions_count);
1410
1411     put_be32(pb, 0); // BodySID of header partition
1412     put_be64(pb, 0); // offset of header partition
1413
1414     for (i = 0; i < mxf->body_partitions_count; i++) {
1415         put_be32(pb, 1); // BodySID
1416         put_be64(pb, mxf->body_partition_offset[i]);
1417     }
1418
1419     put_be32(pb, 0); // BodySID of footer partition
1420     put_be64(pb, mxf->footer_partition_offset);
1421
1422     put_be32(pb, url_ftell(pb) - pos + 4);
1423 }
1424
1425 static int mxf_write_footer(AVFormatContext *s)
1426 {
1427     MXFContext *mxf = s->priv_data;
1428     ByteIOContext *pb = s->pb;
1429
1430     mxf_write_klv_fill(s);
1431     mxf->footer_partition_offset = url_ftell(pb);
1432     mxf_write_partition(s, 0, 2, footer_partition_key, 0);
1433
1434     mxf_write_klv_fill(s);
1435     mxf_write_index_table_segment(s);
1436
1437     mxf_write_klv_fill(s);
1438     mxf_write_random_index_pack(s);
1439
1440     if (!url_is_streamed(s->pb)) {
1441         url_fseek(pb, 0, SEEK_SET);
1442         mxf_write_partition(s, 0, 0, header_closed_partition_key, 1);
1443     }
1444
1445     ff_audio_interleave_close(s);
1446
1447     av_freep(&mxf->index_entries);
1448     av_freep(&mxf->body_partition_offset);
1449
1450     mxf_free(s);
1451     return 0;
1452 }
1453
1454 static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1455 {
1456     AVPacketList *pktl;
1457     int stream_count = 0;
1458     int streams[MAX_STREAMS];
1459
1460     memset(streams, 0, sizeof(streams));
1461     pktl = s->packet_buffer;
1462     while (pktl) {
1463         //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);
1464         if (!streams[pktl->pkt.stream_index])
1465             stream_count++;
1466         streams[pktl->pkt.stream_index]++;
1467         pktl = pktl->next;
1468     }
1469
1470     if (stream_count && (s->nb_streams == stream_count || flush)) {
1471         pktl = s->packet_buffer;
1472         if (s->nb_streams != stream_count) {
1473             AVPacketList *first = NULL;
1474             // find first packet in edit unit
1475             while (pktl) {
1476                 AVStream *st = s->streams[pktl->pkt.stream_index];
1477                 if (st->index == 0)
1478                     break;
1479                 else if (!first)
1480                     first = pktl;
1481                 pktl = pktl->next;
1482             }
1483             // purge packet queue
1484             while (pktl) {
1485                 AVPacketList *next = pktl->next;
1486                 av_free_packet(&pktl->pkt);
1487                 av_freep(&pktl);
1488                 pktl = next;
1489             }
1490             if (!first)
1491                 goto out;
1492             pktl = first;
1493         }
1494
1495         *out = pktl->pkt;
1496         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);
1497         s->packet_buffer = pktl->next;
1498         av_freep(&pktl);
1499         return 1;
1500     } else {
1501     out:
1502         av_init_packet(out);
1503         return 0;
1504     }
1505 }
1506
1507 static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
1508 {
1509     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;
1510     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;
1511
1512     return next->dts > pkt->dts ||
1513         (next->dts == pkt->dts && sc->order < sc2->order);
1514 }
1515
1516 static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1517 {
1518     return ff_audio_rechunk_interleave(s, out, pkt, flush,
1519                                mxf_interleave_get_packet, mxf_compare_timestamps);
1520 }
1521
1522 AVOutputFormat mxf_muxer = {
1523     "mxf",
1524     NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1525     NULL,
1526     "mxf",
1527     sizeof(MXFContext),
1528     CODEC_ID_PCM_S16LE,
1529     CODEC_ID_MPEG2VIDEO,
1530     mxf_write_header,
1531     mxf_write_packet,
1532     mxf_write_footer,
1533     AVFMT_NOTIMESTAMPS,
1534     NULL,
1535     mxf_interleave,
1536 };