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 MXF_INDEX_CLUSTER_SIZE 4096
  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 } MXFContext;
 123
 124 static const uint8_t uuid_base[]            = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };
 125 static const uint8_t umid_base[]            = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x01,0x0D,0x00,0x13,0x00,0x00,0x00 };
 126
 127 /**
 128  * complete key for operation pattern, partitions, and primer pack
 129  */
 130 static const uint8_t op1a_ul[]                     = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x01,0x00 };
 131 static const uint8_t footer_partition_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }; // ClosedComplete
 132 static const uint8_t primer_pack_key[]             = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x05,0x01,0x00 };
 133 static const uint8_t index_table_segment_key[]     = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 };
 134 static const uint8_t random_index_pack_key[]       = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
 135 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
 136 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
 137 static const uint8_t klv_fill_key[]                = { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x03,0x01,0x02,0x10,0x01,0x00,0x00,0x00 };
 138
 139 /**
 140  * partial key for header metadata
 141  */
 142 static const uint8_t header_metadata_key[]  = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01 };
 143 static const uint8_t multiple_desc_ul[]     = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x0D,0x01,0x03,0x01,0x02,0x7F,0x01,0x00 };
 144
 145 /**
 146  * SMPTE RP210 http://www.smpte-ra.org/mdd/index.html
 147  */
 148 static const MXFLocalTagPair mxf_local_tag_batch[] = {
 149     // preface set
 150     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */
 151     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */
 152     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */
 153     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */
 154     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */
 155     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */
 156     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */
 157     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */
 158     // Identification
 159     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */
 160     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */
 161     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */
 162     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */
 163     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */
 164     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */
 165     // Content Storage
 166     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */
 167     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */
 168     // Essence Container Data
 169     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */
 170     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */
 171     // Package
 172     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */
 173     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */
 174     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */
 175     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */
 176     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */
 177     // Track
 178     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */
 179     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */
 180     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */
 181     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */
 182     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */
 183     // Sequence
 184     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */
 185     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */
 186     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */
 187     // Source Clip
 188     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */
 189     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */
 190     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */
 191     // File Descriptor
 192     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */
 193     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */
 194     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */
 195     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */
 196     // Generic Picture Essence Descriptor
 197     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */
 198     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */
 199     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */
 200     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */
 201     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */
 202     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */
 203     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */
 204     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */
 205     // Generic Sound Essence Descriptor
 206     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */
 207     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */
 208     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */
 209     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */
 210     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */
 211     // Index Table Segment
 212     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */
 213     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */
 214     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */
 215     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */
 216     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */
 217     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */
 218     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */
 219     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */
 220     // MPEG video Descriptor
 221     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */
 222     // Wave Audio Essence Descriptor
 223     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */
 224     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */
 225 };
 226
 227 static void mxf_write_uuid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
 228 {
 229     put_buffer(pb, uuid_base, 12);
 230     put_be16(pb, type);
 231     put_be16(pb, value);
 232 }
 233
 234 static void mxf_write_umid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
 235 {
 236     put_buffer(pb, umid_base, 16);
 237     mxf_write_uuid(pb, type, value);
 238 }
 239
 240 static void mxf_write_refs_count(ByteIOContext *pb, int ref_count)
 241 {
 242     put_be32(pb, ref_count);
 243     put_be32(pb, 16);
 244 }
 245
 246 static int klv_ber_length(uint64_t len)
 247 {
 248     if (len < 128)
 249         return 1;
 250     else
 251         return (av_log2(len) >> 3) + 2;
 252 }
 253
 254 static int klv_encode_ber_length(ByteIOContext *pb, uint64_t len)
 255 {
 256     // Determine the best BER size
 257     int size;
 258     if (len < 128) {
 259         //short form
 260         put_byte(pb, len);
 261         return 1;
 262     }
 263
 264     size = (av_log2(len) >> 3) + 1;
 265
 266     // long form
 267     put_byte(pb, 0x80 + size);
 268     while(size) {
 269         size--;
 270         put_byte(pb, len >> 8 * size & 0xff);
 271     }
 272     return 0;
 273 }
 274
 275 /*
 276  * Get essence container ul index
 277  */
 278 static int mxf_get_essence_container_ul_index(enum CodecID id)
 279 {
 280     int i;
 281     for (i = 0; mxf_essence_mappings[i].id; i++)
 282         if (mxf_essence_mappings[i].id == id)
 283             return mxf_essence_mappings[i].index;
 284     return -1;
 285 }
 286
 287 static void mxf_write_primer_pack(AVFormatContext *s)
 288 {
 289     ByteIOContext *pb = s->pb;
 290     int local_tag_number, i = 0;
 291
 292     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);
 293
 294     put_buffer(pb, primer_pack_key, 16);
 295     klv_encode_ber_length(pb, local_tag_number * 18 + 8);
 296
 297     put_be32(pb, local_tag_number); // local_tag num
 298     put_be32(pb, 18); // item size, always 18 according to the specs
 299
 300     for (i = 0; i < local_tag_number; i++) {
 301         put_be16(pb, mxf_local_tag_batch[i].local_tag);
 302         put_buffer(pb, mxf_local_tag_batch[i].uid, 16);
 303     }
 304 }
 305
 306 static void mxf_write_local_tag(ByteIOContext *pb, int size, int tag)
 307 {
 308     put_be16(pb, tag);
 309     put_be16(pb, size);
 310 }
 311
 312 static void mxf_write_metadata_key(ByteIOContext *pb, unsigned int value)
 313 {
 314     put_buffer(pb, header_metadata_key, 13);
 315     put_be24(pb, value);
 316 }
 317
 318 static void mxf_free(AVFormatContext *s)
 319 {
 320     int i;
 321
 322     for (i = 0; i < s->nb_streams; i++) {
 323         AVStream *st = s->streams[i];
 324         av_freep(&st->priv_data);
 325     }
 326 }
 327
 328 static const MXFCodecUL *mxf_get_data_definition_ul(int type)
 329 {
 330     const MXFCodecUL *uls = ff_mxf_data_definition_uls;
 331     while (uls->uid[0]) {
 332         if (type == uls->id)
 333             break;
 334         uls++;
 335     }
 336     return uls;
 337 }
 338
 339 static void mxf_write_essence_container_refs(AVFormatContext *s)
 340 {
 341     MXFContext *c = s->priv_data;
 342     ByteIOContext *pb = s->pb;
 343     int i;
 344
 345     mxf_write_refs_count(pb, c->essence_container_count);
 346     av_log(s,AV_LOG_DEBUG, "essence container count:%d\n", c->essence_container_count);
 347     for (i = 0; i < c->essence_container_count; i++) {
 348         put_buffer(pb, mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul, 16);
 349         PRINT_KEY(s, "essence container ul:\n", mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul);
 350     }
 351 }
 352
 353 static void mxf_write_preface(AVFormatContext *s)
 354 {
 355     MXFContext *mxf = s->priv_data;
 356     ByteIOContext *pb = s->pb;
 357
 358     mxf_write_metadata_key(pb, 0x012f00);
 359     PRINT_KEY(s, "preface key", pb->buf_ptr - 16);
 360     klv_encode_ber_length(pb, 130 + 16 * mxf->essence_container_count);
 361
 362     // write preface set uid
 363     mxf_write_local_tag(pb, 16, 0x3C0A);
 364     mxf_write_uuid(pb, Preface, 0);
 365     PRINT_KEY(s, "preface uid", pb->buf_ptr - 16);
 366
 367     // last modified date
 368     mxf_write_local_tag(pb, 8, 0x3B02);
 369     put_be64(pb, mxf->timestamp);
 370
 371     // write version
 372     mxf_write_local_tag(pb, 2, 0x3B05);
 373     put_be16(pb, 1);
 374
 375     // write identification_refs
 376     mxf_write_local_tag(pb, 16 + 8, 0x3B06);
 377     mxf_write_refs_count(pb, 1);
 378     mxf_write_uuid(pb, Identification, 0);
 379
 380     // write content_storage_refs
 381     mxf_write_local_tag(pb, 16, 0x3B03);
 382     mxf_write_uuid(pb, ContentStorage, 0);
 383
 384     // operational pattern
 385     mxf_write_local_tag(pb, 16, 0x3B09);
 386     if (s->nb_streams > 1) {
 387         put_buffer(pb, op1a_ul, 14);
 388         put_be16(pb, 0x0900); // multi track
 389     } else {
 390         put_buffer(pb, op1a_ul, 16);
 391     }
 392
 393     // write essence_container_refs
 394     mxf_write_local_tag(pb, 8 + 16 * mxf->essence_container_count, 0x3B0A);
 395     mxf_write_essence_container_refs(s);
 396
 397     // write dm_scheme_refs
 398     mxf_write_local_tag(pb, 8, 0x3B0B);
 399     put_be64(pb, 0);
 400 }
 401
 402 /*
 403  * Write a local tag containing an ascii string as utf-16
 404  */
 405 static void mxf_write_local_tag_utf16(ByteIOContext *pb, int tag, const char *value)
 406 {
 407     int i, size = strlen(value);
 408     mxf_write_local_tag(pb, size*2, tag);
 409     for (i = 0; i < size; i++)
 410         put_be16(pb, value[i]);
 411 }
 412
 413 static void mxf_write_identification(AVFormatContext *s)
 414 {
 415     MXFContext *mxf = s->priv_data;
 416     ByteIOContext *pb = s->pb;
 417     const char *company = "FFmpeg";
 418     const char *product = "OP1a Muxer";
 419     const char *version;
 420     int length;
 421
 422     mxf_write_metadata_key(pb, 0x013000);
 423     PRINT_KEY(s, "identification key", pb->buf_ptr - 16);
 424
 425     version = s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT ?
 426         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);
 427     length = 84 + (strlen(company)+strlen(product)+strlen(version))*2; // utf-16
 428     klv_encode_ber_length(pb, length);
 429
 430     // write uid
 431     mxf_write_local_tag(pb, 16, 0x3C0A);
 432     mxf_write_uuid(pb, Identification, 0);
 433     PRINT_KEY(s, "identification uid", pb->buf_ptr - 16);
 434
 435     // write generation uid
 436     mxf_write_local_tag(pb, 16, 0x3C09);
 437     mxf_write_uuid(pb, Identification, 1);
 438
 439     mxf_write_local_tag_utf16(pb, 0x3C01, company); // Company Name
 440     mxf_write_local_tag_utf16(pb, 0x3C02, product); // Product Name
 441     mxf_write_local_tag_utf16(pb, 0x3C04, version); // Version String
 442
 443     // write product uid
 444     mxf_write_local_tag(pb, 16, 0x3C05);
 445     mxf_write_uuid(pb, Identification, 2);
 446
 447     // modification date
 448     mxf_write_local_tag(pb, 8, 0x3C06);
 449     put_be64(pb, mxf->timestamp);
 450 }
 451
 452 static void mxf_write_content_storage(AVFormatContext *s)
 453 {
 454     ByteIOContext *pb = s->pb;
 455
 456     mxf_write_metadata_key(pb, 0x011800);
 457     PRINT_KEY(s, "content storage key", pb->buf_ptr - 16);
 458     klv_encode_ber_length(pb, 92);
 459
 460     // write uid
 461     mxf_write_local_tag(pb, 16, 0x3C0A);
 462     mxf_write_uuid(pb, ContentStorage, 0);
 463     PRINT_KEY(s, "content storage uid", pb->buf_ptr - 16);
 464
 465     // write package reference
 466     mxf_write_local_tag(pb, 16 * 2 + 8, 0x1901);
 467     mxf_write_refs_count(pb, 2);
 468     mxf_write_uuid(pb, MaterialPackage, 0);
 469     mxf_write_uuid(pb, SourcePackage, 0);
 470
 471     // write essence container data
 472     mxf_write_local_tag(pb, 8 + 16, 0x1902);
 473     mxf_write_refs_count(pb, 1);
 474     mxf_write_uuid(pb, EssenceContainerData, 0);
 475 }
 476
 477 static void mxf_write_track(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 478 {
 479     MXFContext *mxf = s->priv_data;
 480     ByteIOContext *pb = s->pb;
 481     MXFStreamContext *sc = st->priv_data;
 482
 483     mxf_write_metadata_key(pb, 0x013b00);
 484     PRINT_KEY(s, "track key", pb->buf_ptr - 16);
 485     klv_encode_ber_length(pb, 80);
 486
 487     // write track uid
 488     mxf_write_local_tag(pb, 16, 0x3C0A);
 489     mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, st->index);
 490     PRINT_KEY(s, "track uid", pb->buf_ptr - 16);
 491
 492     // write track id
 493     mxf_write_local_tag(pb, 4, 0x4801);
 494     put_be32(pb, st->index);
 495
 496     // write track number
 497     mxf_write_local_tag(pb, 4, 0x4804);
 498     if (type == MaterialPackage)
 499         put_be32(pb, 0); // track number of material package is 0
 500     else
 501         put_buffer(pb, sc->track_essence_element_key + 12, 4);
 502
 503     mxf_write_local_tag(pb, 8, 0x4B01);
 504     put_be32(pb, mxf->time_base.den);
 505     put_be32(pb, mxf->time_base.num);
 506
 507     // write origin
 508     mxf_write_local_tag(pb, 8, 0x4B02);
 509     put_be64(pb, 0);
 510
 511     // write sequence refs
 512     mxf_write_local_tag(pb, 16, 0x4803);
 513     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 514 }
 515
 516 static void mxf_write_common_fields(ByteIOContext *pb, AVStream *st)
 517 {
 518     const MXFCodecUL *data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);
 519     MXFStreamContext *sc = st->priv_data;
 520
 521     // find data define uls
 522     mxf_write_local_tag(pb, 16, 0x0201);
 523     put_buffer(pb, data_def_ul->uid, 16);
 524
 525     // write duration
 526     mxf_write_local_tag(pb, 8, 0x0202);
 527     put_be64(pb, sc->duration);
 528 }
 529
 530 static void mxf_write_sequence(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 531 {
 532     ByteIOContext *pb = s->pb;
 533
 534     mxf_write_metadata_key(pb, 0x010f00);
 535     PRINT_KEY(s, "sequence key", pb->buf_ptr - 16);
 536     klv_encode_ber_length(pb, 80);
 537
 538     mxf_write_local_tag(pb, 16, 0x3C0A);
 539     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 540
 541     PRINT_KEY(s, "sequence uid", pb->buf_ptr - 16);
 542     mxf_write_common_fields(pb, st);
 543
 544     // write structural component
 545     mxf_write_local_tag(pb, 16 + 8, 0x1001);
 546     mxf_write_refs_count(pb, 1);
 547     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
 548 }
 549
 550 static void mxf_write_structural_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 551 {
 552     ByteIOContext *pb = s->pb;
 553     int i;
 554
 555     mxf_write_metadata_key(pb, 0x011100);
 556     PRINT_KEY(s, "sturctural component key", pb->buf_ptr - 16);
 557     klv_encode_ber_length(pb, 108);
 558
 559     // write uid
 560     mxf_write_local_tag(pb, 16, 0x3C0A);
 561     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
 562
 563     PRINT_KEY(s, "structural component uid", pb->buf_ptr - 16);
 564     mxf_write_common_fields(pb, st);
 565
 566     // write start_position
 567     mxf_write_local_tag(pb, 8, 0x1201);
 568     put_be64(pb, 0);
 569
 570     // write source package uid, end of the reference
 571     mxf_write_local_tag(pb, 32, 0x1101);
 572     if (type == SourcePackage) {
 573         for (i = 0; i < 4; i++)
 574             put_be64(pb, 0);
 575     } else
 576         mxf_write_umid(pb, SourcePackage, 0);
 577
 578     // write source track id
 579     mxf_write_local_tag(pb, 4, 0x1102);
 580     if (type == SourcePackage)
 581         put_be32(pb, 0);
 582     else
 583         put_be32(pb, st->index);
 584 }
 585
 586 static void mxf_write_multi_descriptor(AVFormatContext *s)
 587 {
 588     MXFContext *mxf = s->priv_data;
 589     ByteIOContext *pb = s->pb;
 590     int i;
 591
 592     mxf_write_metadata_key(pb, 0x014400);
 593     PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);
 594     klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);
 595
 596     mxf_write_local_tag(pb, 16, 0x3C0A);
 597     mxf_write_uuid(pb, MultipleDescriptor, 0);
 598     PRINT_KEY(s, "multi_desc uid", pb->buf_ptr - 16);
 599
 600     // write sample rate
 601     mxf_write_local_tag(pb, 8, 0x3001);
 602     put_be32(pb, mxf->time_base.den);
 603     put_be32(pb, mxf->time_base.num);
 604
 605     // write essence container ul
 606     mxf_write_local_tag(pb, 16, 0x3004);
 607     put_buffer(pb, multiple_desc_ul, 16);
 608
 609     // write sub descriptor refs
 610     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x3F01);
 611     mxf_write_refs_count(pb, s->nb_streams);
 612     for (i = 0; i < s->nb_streams; i++)
 613         mxf_write_uuid(pb, SubDescriptor, i);
 614 }
 615
 616 static void mxf_write_generic_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 617 {
 618     MXFContext *mxf = s->priv_data;
 619     MXFStreamContext *sc = st->priv_data;
 620     ByteIOContext *pb = s->pb;
 621
 622     put_buffer(pb, key, 16);
 623     klv_encode_ber_length(pb, size);
 624
 625     mxf_write_local_tag(pb, 16, 0x3C0A);
 626     mxf_write_uuid(pb, SubDescriptor, st->index);
 627
 628     mxf_write_local_tag(pb, 4, 0x3006);
 629     put_be32(pb, st->index);
 630
 631     mxf_write_local_tag(pb, 8, 0x3001);
 632     put_be32(pb, mxf->time_base.den);
 633     put_be32(pb, mxf->time_base.num);
 634
 635     mxf_write_local_tag(pb, 16, 0x3004);
 636     put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
 637 }
 638
 639 static const UID mxf_mpegvideo_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 };
 640 static const UID mxf_wav_descriptor_key       = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 };
 641 static const UID mxf_aes3_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 };
 642
 643 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
 644 {
 645     MXFStreamContext *sc = st->priv_data;
 646     ByteIOContext *pb = s->pb;
 647     int stored_height = (st->codec->height+15)/16*16;
 648     AVRational dar;
 649     int f1, f2;
 650
 651     mxf_write_generic_desc(s, st, mxf_mpegvideo_descriptor_key, 153+sc->interlaced*4);
 652
 653     mxf_write_local_tag(pb, 4, 0x3203);
 654     put_be32(pb, st->codec->width);
 655
 656     mxf_write_local_tag(pb, 4, 0x3202);
 657     put_be32(pb, stored_height>>sc->interlaced);
 658
 659     mxf_write_local_tag(pb, 4, 0x3209);
 660     put_be32(pb, st->codec->width);
 661
 662     mxf_write_local_tag(pb, 4, 0x3208);
 663     put_be32(pb, st->codec->height>>sc->interlaced);
 664
 665     // bit rate
 666     mxf_write_local_tag(pb, 4, 0x8000);
 667     put_be32(pb, st->codec->bit_rate);
 668
 669     // frame layout
 670     mxf_write_local_tag(pb, 1, 0x320C);
 671     put_byte(pb, sc->interlaced);
 672
 673     // video line map
 674     switch (st->codec->height) {
 675     case  576: f1 = 23; f2 = 336; break;
 676     case  608: f1 =  7; f2 = 320; break;
 677     case  480: f1 = 20; f2 = 283; break;
 678     case  512: f1 =  7; f2 = 270; break;
 679     case  720: f1 = 26; f2 =   0; break; // progressive
 680     case 1080: f1 = 21; f2 = 584; break;
 681     default:   f1 =  0; f2 =   0; break;
 682     }
 683
 684     if (!sc->interlaced) {
 685         f2  = 0;
 686         f1 *= 2;
 687     }
 688
 689     mxf_write_local_tag(pb, 12+sc->interlaced*4, 0x320D);
 690     put_be32(pb, sc->interlaced ? 2 : 1);
 691     put_be32(pb, 4);
 692     put_be32(pb, f1);
 693     if (sc->interlaced)
 694         put_be32(pb, f2);
 695
 696     av_reduce(&dar.num, &dar.den,
 697               st->codec->width*st->codec->sample_aspect_ratio.num,
 698               st->codec->height*st->codec->sample_aspect_ratio.den,
 699               1024*1024);
 700
 701     mxf_write_local_tag(pb, 8, 0x320E);
 702     put_be32(pb, dar.num);
 703     put_be32(pb, dar.den);
 704
 705     mxf_write_local_tag(pb, 16, 0x3201);
 706     put_buffer(pb, *sc->codec_ul, 16);
 707 }
 708
 709 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 710 {
 711     ByteIOContext *pb = s->pb;
 712
 713     mxf_write_generic_desc(s, st, key, size);
 714
 715     // audio locked
 716     mxf_write_local_tag(pb, 1, 0x3D02);
 717     put_byte(pb, 1);
 718
 719     // write audio sampling rate
 720     mxf_write_local_tag(pb, 8, 0x3D03);
 721     put_be32(pb, st->codec->sample_rate);
 722     put_be32(pb, 1);
 723
 724     mxf_write_local_tag(pb, 4, 0x3D07);
 725     put_be32(pb, st->codec->channels);
 726
 727     mxf_write_local_tag(pb, 4, 0x3D01);
 728     put_be32(pb, av_get_bits_per_sample(st->codec->codec_id));
 729 }
 730
 731 static void mxf_write_wav_common_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 732 {
 733     ByteIOContext *pb = s->pb;
 734
 735     mxf_write_generic_sound_desc(s, st, key, size);
 736
 737     mxf_write_local_tag(pb, 2, 0x3D0A);
 738     put_be16(pb, st->codec->block_align);
 739
 740     // avg bytes per sec
 741     mxf_write_local_tag(pb, 4, 0x3D09);
 742     put_be32(pb, st->codec->block_align*st->codec->sample_rate);
 743 }
 744
 745 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)
 746 {
 747     mxf_write_wav_common_desc(s, st, mxf_wav_descriptor_key, 107);
 748 }
 749
 750 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)
 751 {
 752     mxf_write_wav_common_desc(s, st, mxf_aes3_descriptor_key, 107);
 753 }
 754
 755 static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)
 756 {
 757     MXFContext *mxf = s->priv_data;
 758     ByteIOContext *pb = s->pb;
 759     int i;
 760
 761     if (type == MaterialPackage) {
 762         mxf_write_metadata_key(pb, 0x013600);
 763         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);
 764         klv_encode_ber_length(pb, 92 + 16 * s->nb_streams);
 765     } else {
 766         mxf_write_metadata_key(pb, 0x013700);
 767         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);
 768         klv_encode_ber_length(pb, 112 + 16 * s->nb_streams); // 20 bytes length for descriptor reference
 769     }
 770
 771     // write uid
 772     mxf_write_local_tag(pb, 16, 0x3C0A);
 773     mxf_write_uuid(pb, type, 0);
 774     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);
 775     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);
 776
 777     // write package umid
 778     mxf_write_local_tag(pb, 32, 0x4401);
 779     mxf_write_umid(pb, type, 0);
 780     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);
 781
 782     // package creation date
 783     mxf_write_local_tag(pb, 8, 0x4405);
 784     put_be64(pb, mxf->timestamp);
 785
 786     // package modified date
 787     mxf_write_local_tag(pb, 8, 0x4404);
 788     put_be64(pb, mxf->timestamp);
 789
 790     // write track refs
 791     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x4403);
 792     mxf_write_refs_count(pb, s->nb_streams);
 793     for (i = 0; i < s->nb_streams; i++)
 794         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);
 795
 796     // write multiple descriptor reference
 797     if (type == SourcePackage) {
 798         mxf_write_local_tag(pb, 16, 0x4701);
 799         if (s->nb_streams > 1) {
 800             mxf_write_uuid(pb, MultipleDescriptor, 0);
 801             mxf_write_multi_descriptor(s);
 802         } else
 803             mxf_write_uuid(pb, SubDescriptor, 0);
 804     }
 805
 806     for (i = 0; i < s->nb_streams; i++) {
 807         AVStream *st = s->streams[i];
 808         mxf_write_track(s, st, type);
 809         mxf_write_sequence(s, st, type);
 810         mxf_write_structural_component(s, st, type);
 811
 812         if (type == SourcePackage) {
 813             MXFStreamContext *sc = st->priv_data;
 814             mxf_essence_container_uls[sc->index].write_desc(s, st);
 815         }
 816     }
 817 }
 818
 819 static int mxf_write_essence_container_data(AVFormatContext *s)
 820 {
 821     ByteIOContext *pb = s->pb;
 822
 823     mxf_write_metadata_key(pb, 0x012300);
 824     klv_encode_ber_length(pb, 72);
 825
 826     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID
 827     mxf_write_uuid(pb, EssenceContainerData, 0);
 828
 829     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID
 830     mxf_write_umid(pb, SourcePackage, 0);
 831
 832     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID
 833     put_be32(pb, 1);
 834
 835     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID
 836     put_be32(pb, 2);
 837
 838     return 0;
 839 }
 840
 841 static int mxf_write_header_metadata_sets(AVFormatContext *s)
 842 {
 843     mxf_write_preface(s);
 844     mxf_write_identification(s);
 845     mxf_write_content_storage(s);
 846     mxf_write_package(s, MaterialPackage);
 847     mxf_write_package(s, SourcePackage);
 848     mxf_write_essence_container_data(s);
 849     return 0;
 850 }
 851
 852 static unsigned klv_fill_size(uint64_t size)
 853 {
 854     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));
 855     if (pad < 17) // smallest fill item possible
 856         return pad + KAG_SIZE;
 857     else
 858         return pad & (KAG_SIZE-1);
 859 }
 860
 861 static void mxf_write_index_table_segment(AVFormatContext *s)
 862 {
 863     MXFContext *mxf = s->priv_data;
 864     ByteIOContext *pb = s->pb;
 865     int i, j;
 866     int temporal_reordering = 0;
 867     int last_key_index = 0, key_index = 0;
 868
 869     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);
 870
 871     put_buffer(pb, index_table_segment_key, 16);
 872     klv_encode_ber_length(pb, 109 + (s->nb_streams+1)*6 +
 873                           mxf->edit_units_count*(11+mxf->slice_count*4));
 874
 875     // instance id
 876     mxf_write_local_tag(pb, 16, 0x3C0A);
 877     mxf_write_uuid(pb, IndexTableSegment, 0);
 878
 879     // index edit rate
 880     mxf_write_local_tag(pb, 8, 0x3F0B);
 881     put_be32(pb, mxf->time_base.num);
 882     put_be32(pb, mxf->time_base.den);
 883
 884     // index start position
 885     mxf_write_local_tag(pb, 8, 0x3F0C);
 886     put_be64(pb, 0);
 887
 888     // index duration
 889     mxf_write_local_tag(pb, 8, 0x3F0D);
 890     put_be64(pb, mxf->edit_units_count);
 891
 892     // edit unit byte count
 893     mxf_write_local_tag(pb, 4, 0x3F05);
 894     put_be32(pb, 0);
 895
 896     // index sid
 897     mxf_write_local_tag(pb, 4, 0x3F06);
 898     put_be32(pb, 2);
 899
 900     // body sid
 901     mxf_write_local_tag(pb, 4, 0x3F07);
 902     put_be32(pb, 1);
 903
 904     // real slice count - 1
 905     mxf_write_local_tag(pb, 1, 0x3F08);
 906     put_byte(pb, mxf->slice_count);
 907
 908     // delta entry array
 909     mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);
 910     put_be32(pb, s->nb_streams+1); // num of entries
 911     put_be32(pb, 6);             // size of one entry
 912     // write system item delta entry
 913     put_byte(pb, 0);
 914     put_byte(pb, 0); // slice entry
 915     put_be32(pb, 0); // element delta
 916     for (i = 0; i < s->nb_streams; i++) {
 917         AVStream *st = s->streams[i];
 918         MXFStreamContext *sc = st->priv_data;
 919         put_byte(pb, sc->temporal_reordering);
 920         if (sc->temporal_reordering)
 921             temporal_reordering = 1;
 922         // slice number
 923         if (i == 0) { // video track
 924             put_byte(pb, 0); // slice number
 925             put_be32(pb, KAG_SIZE); // system item size including klv fill
 926         } else { // audio track
 927             unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;
 928             audio_frame_size += klv_fill_size(audio_frame_size);
 929             put_byte(pb, 1);
 930             put_be32(pb, (i-1)*audio_frame_size); // element delta
 931         }
 932     }
 933
 934     mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);
 935     put_be32(pb, mxf->edit_units_count);  // num of entries
 936     put_be32(pb, 11+mxf->slice_count*4);  // size of one entry
 937     for (i = 0; i < mxf->edit_units_count; i++) {
 938         if (temporal_reordering) {
 939             int temporal_offset = 0;
 940             for (j = i+1; j < mxf->edit_units_count; j++) {
 941                 temporal_offset++;
 942                 if (mxf->index_entries[j].flags & 0x10) { // backward prediction
 943                     // next is not b, so is reordered
 944                     if (!(mxf->index_entries[i+1].flags & 0x10)) {
 945                         if ((mxf->index_entries[i].flags & 0x11) == 0) // i frame
 946                             temporal_offset = 0;
 947                         else
 948                             temporal_offset = -temporal_offset;
 949                     }
 950                     break;
 951                 }
 952             }
 953             put_byte(pb, temporal_offset);
 954         } else
 955             put_byte(pb, 0);
 956         if (!(mxf->index_entries[i].flags & 0x33)) { // I frame
 957             last_key_index = key_index;
 958             key_index = i;
 959         }
 960         if (mxf->index_entries[i].flags & 0x10 && // backward prediction
 961             !(mxf->index_entries[key_index].flags & 0x80)) { // open gop
 962             put_byte(pb, last_key_index - i);
 963         } else {
 964             put_byte(pb, key_index - i); // key frame offset
 965             if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward
 966                 last_key_index = key_index;
 967         }
 968         put_byte(pb, mxf->index_entries[i].flags);
 969         // stream offset
 970         put_be64(pb, mxf->index_entries[i].offset - mxf->index_entries[0].offset);
 971         if (s->nb_streams > 1)
 972             put_be32(pb, mxf->index_entries[i].slice_offset);
 973     }
 974 }
 975
 976 static void mxf_write_klv_fill(AVFormatContext *s)
 977 {
 978     unsigned pad = klv_fill_size(url_ftell(s->pb));
 979     if (pad) {
 980         put_buffer(s->pb, klv_fill_key, 16);
 981         pad -= 16;
 982         pad -= klv_ber_length(pad);
 983         klv_encode_ber_length(s->pb, pad);
 984         for (; pad > 7; pad -= 8)
 985             put_be64(s->pb, 0);
 986         for (; pad; pad--)
 987             put_byte(s->pb, 0);
 988         assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));
 989     }
 990 }
 991
 992 static void mxf_write_partition(AVFormatContext *s, int bodysid,
 993                                 int indexsid, unsigned index_byte_count,
 994                                 const uint8_t *key, int write_metadata)
 995 {
 996     MXFContext *mxf = s->priv_data;
 997     ByteIOContext *pb = s->pb;
 998     int64_t header_byte_count_offset;
 999
1000     // write klv
1001     put_buffer(pb, key, 16);
1002
1003     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);
1004
1005     // write partition value
1006     put_be16(pb, 1); // majorVersion
1007     put_be16(pb, 2); // minorVersion
1008     put_be32(pb, KAG_SIZE); // KAGSize
1009
1010     put_be64(pb, url_ftell(pb) - 25); // thisPartition
1011     put_be64(pb, 0); // previousPartition
1012
1013     put_be64(pb, mxf->footer_partition_offset); // footerPartition
1014
1015     // set offset
1016     header_byte_count_offset = url_ftell(pb);
1017     put_be64(pb, 0); // headerByteCount, update later
1018
1019     // indexTable
1020     put_be64(pb, index_byte_count); // indexByteCount
1021     put_be32(pb, indexsid); // indexSID
1022     put_be64(pb, 0); // bodyOffset
1023
1024     put_be32(pb, bodysid); // bodySID
1025
1026     // operational pattern
1027     if (s->nb_streams > 1) {
1028         put_buffer(pb, op1a_ul, 14);
1029         put_be16(pb, 0x0900); // multi track
1030     } else {
1031         put_buffer(pb, op1a_ul, 16);
1032     }
1033
1034     // essence container
1035     mxf_write_essence_container_refs(s);
1036
1037     if (write_metadata) {
1038         // mark the start of the headermetadata and calculate metadata size
1039         int64_t pos, start = url_ftell(s->pb);
1040         unsigned header_byte_count;
1041
1042         mxf_write_klv_fill(s);
1043
1044         mxf_write_primer_pack(s);
1045         mxf_write_header_metadata_sets(s);
1046         pos = url_ftell(s->pb);
1047         header_byte_count = pos - start + klv_fill_size(pos);
1048
1049         // update header_byte_count
1050         url_fseek(pb, header_byte_count_offset, SEEK_SET);
1051         put_be64(pb, header_byte_count);
1052         url_fseek(pb, pos, SEEK_SET);
1053     }
1054
1055     put_flush_packet(pb);
1056 }
1057
1058 static const UID mxf_mpeg2_codec_uls[] = {
1059     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame
1060     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP
1061     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame
1062     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP
1063     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame
1064     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP
1065     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame
1066     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP
1067 };
1068
1069 static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)
1070 {
1071     if (avctx->profile == 4) { // Main
1072         if (avctx->level == 8) // Main
1073             return avctx->gop_size ?
1074                 &mxf_mpeg2_codec_uls[1] :
1075                 &mxf_mpeg2_codec_uls[0];
1076         else if (avctx->level == 4) // High
1077             return avctx->gop_size ?
1078                 &mxf_mpeg2_codec_uls[5] :
1079                 &mxf_mpeg2_codec_uls[4];
1080     } else if (avctx->profile == 0) { // 422
1081         if (avctx->level == 5) // Main
1082             return avctx->gop_size ?
1083                 &mxf_mpeg2_codec_uls[3] :
1084                 &mxf_mpeg2_codec_uls[2];
1085         else if (avctx->level == 2) // High
1086             return avctx->gop_size ?
1087                 &mxf_mpeg2_codec_uls[7] :
1088                 &mxf_mpeg2_codec_uls[6];
1089     }
1090     return NULL;
1091 }
1092
1093 static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)
1094 {
1095     MXFContext *mxf = s->priv_data;
1096     MXFStreamContext *sc = st->priv_data;
1097     uint32_t c = -1;
1098     int i;
1099
1100     mxf->index_entries[mxf->edit_units_count].flags = 0;
1101
1102     for(i = 0; i < pkt->size - 4; i++) {
1103         c = (c<<8) + pkt->data[i];
1104         if (c == 0x1B5) {
1105             if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
1106                 st->codec->profile = pkt->data[i+1] & 0x07;
1107                 st->codec->level   = pkt->data[i+2] >> 4;
1108             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext
1109                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame
1110                 break;
1111             }
1112         } else if (c == 0x1b8) { // gop
1113             if (i + 4 < pkt->size && pkt->data[i+4]>>6 & 0x01) // closed
1114                 mxf->index_entries[mxf->edit_units_count].flags |= 0x80; // random access
1115         } else if (c == 0x1b3) { // seq
1116             mxf->index_entries[mxf->edit_units_count].flags |= 0x40;
1117         } else if (c == 0x100) { // pic
1118             int pict_type = (pkt->data[i+2]>>3) & 0x07;
1119             if (pict_type == 2) { // P frame
1120                 mxf->index_entries[mxf->edit_units_count].flags |= 0x22;
1121                 st->codec->gop_size = 1;
1122             } else if (pict_type == 3) { // B frame
1123                 mxf->index_entries[mxf->edit_units_count].flags |= 0x33;
1124                 sc->temporal_reordering = -1;
1125             } else if (!pict_type) {
1126                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");
1127                 return 0;
1128             }
1129         }
1130     }
1131     sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);
1132     return !!sc->codec_ul;
1133 }
1134
1135 static uint64_t mxf_parse_timestamp(time_t timestamp)
1136 {
1137     struct tm *time = localtime(&timestamp);
1138     return (uint64_t)(time->tm_year+1900) << 48 |
1139            (uint64_t)(time->tm_mon+1)     << 40 |
1140            (uint64_t) time->tm_mday       << 32 |
1141                       time->tm_hour       << 24 |
1142                       time->tm_min        << 16 |
1143                       time->tm_sec        << 8;
1144 }
1145
1146 static int mxf_write_header(AVFormatContext *s)
1147 {
1148     MXFContext *mxf = s->priv_data;
1149     int i;
1150     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};
1151     const int *samples_per_frame = NULL;
1152
1153     if (s->nb_streams > 17) {
1154         av_log(s, AV_LOG_ERROR, "error, mxf muxer supports 17 tracks maximum\n");
1155         return -1;
1156     }
1157
1158     for (i = 0; i < s->nb_streams; i++) {
1159         AVStream *st = s->streams[i];
1160         MXFStreamContext *sc = av_mallocz(sizeof(*sc));
1161         if (!sc)
1162             return AVERROR(ENOMEM);
1163         st->priv_data = sc;
1164
1165         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
1166             if (i != 0) {
1167                 av_log(s, AV_LOG_ERROR, "video stream must be first track\n");
1168                 return -1;
1169             }
1170             if (fabs(av_q2d(st->codec->time_base) - 1/25.0) < 0.0001) {
1171                 samples_per_frame = PAL_samples_per_frame;
1172                 mxf->time_base = (AVRational){ 1, 25 };
1173             } else if (fabs(av_q2d(st->codec->time_base) - 1001/30000.0) < 0.0001) {
1174                 samples_per_frame = NTSC_samples_per_frame;
1175                 mxf->time_base = (AVRational){ 1001, 30000 };
1176             } else {
1177                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");
1178                 return -1;
1179             }
1180             av_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);
1181         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1182             if (st->codec->sample_rate != 48000) {
1183                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");
1184                 return -1;
1185             }
1186             av_set_pts_info(st, 64, 1, st->codec->sample_rate);
1187             mxf->slice_count = 1;
1188         }
1189         sc->duration = -1;
1190
1191         sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);
1192         if (sc->index == -1) {
1193             av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "
1194                    "codec not currently supported in container\n", i);
1195             return -1;
1196         }
1197
1198         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;
1199
1200         if (!present[sc->index]) {
1201             mxf->essence_containers_indices[mxf->essence_container_count++] = sc->index;
1202             present[sc->index] = 1;
1203         } else
1204             present[sc->index]++;
1205         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);
1206         sc->track_essence_element_key[15] = present[sc->index];
1207         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);
1208     }
1209
1210     for (i = 0; i < s->nb_streams; i++) {
1211         MXFStreamContext *sc = s->streams[i]->priv_data;
1212         // update element count
1213         sc->track_essence_element_key[13] = present[sc->index];
1214         sc->order = AV_RB32(sc->track_essence_element_key+12);
1215     }
1216
1217     mxf->timestamp = mxf_parse_timestamp(s->timestamp);
1218
1219     if (!samples_per_frame)
1220         samples_per_frame = PAL_samples_per_frame;
1221
1222     if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)
1223         return -1;
1224
1225     return 0;
1226 }
1227
1228 static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };
1229 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 };
1230
1231 static uint32_t ff_framenum_to_12m_time_code(unsigned frame, int drop, int fps)
1232 {
1233     return (0                                    << 31) | // color frame flag
1234            (0                                    << 30) | // drop  frame flag
1235            ( ((frame % fps) / 10)                << 28) | // tens  of frames
1236            ( ((frame % fps) % 10)                << 24) | // units of frames
1237            (0                                    << 23) | // field phase (NTSC), b0 (PAL)
1238            ((((frame / fps) % 60) / 10)          << 20) | // tens  of seconds
1239            ((((frame / fps) % 60) % 10)          << 16) | // units of seconds
1240            (0                                    << 15) | // b0 (NTSC), b2 (PAL)
1241            ((((frame / (fps * 60)) % 60) / 10)   << 12) | // tens  of minutes
1242            ((((frame / (fps * 60)) % 60) % 10)   <<  8) | // units of minutes
1243            (0                                    <<  7) | // b1
1244            (0                                    <<  6) | // b2 (NSC), field phase (PAL)
1245            ((((frame / (fps * 3600) % 24)) / 10) <<  4) | // tens  of hours
1246            (  (frame / (fps * 3600) % 24)) % 10;          // units of hours
1247 }
1248
1249 static void mxf_write_system_item(AVFormatContext *s)
1250 {
1251     MXFContext *mxf = s->priv_data;
1252     ByteIOContext *pb = s->pb;
1253     unsigned fps, frame;
1254     uint32_t time_code;
1255
1256     frame = mxf->edit_units_count;
1257
1258     // write system metadata pack
1259     put_buffer(pb, system_metadata_pack_key, 16);
1260     klv_encode_ber_length(pb, 57);
1261     put_byte(pb, 0x5c); // UL, user date/time stamp, picture and sound item present
1262     put_byte(pb, 0x04); // content package rate
1263     put_byte(pb, 0x00); // content package type
1264     put_be16(pb, 0x00); // channel handle
1265     put_be16(pb, frame); // continuity count
1266     if (mxf->essence_container_count > 1)
1267         put_buffer(pb, multiple_desc_ul, 16);
1268     else
1269         put_buffer(pb, mxf_essence_container_uls[mxf->essence_containers_indices[0]].container_ul, 16);
1270     put_byte(pb, 0);
1271     put_be64(pb, 0);
1272     put_be64(pb, 0); // creation date/time stamp
1273
1274     // XXX drop frame
1275     if (mxf->time_base.den == 30000) fps = 30;
1276     else                             fps = 25;
1277
1278     put_byte(pb, 0x81); // SMPTE 12M time code
1279     time_code = ff_framenum_to_12m_time_code(frame, 0, fps);
1280     put_be32(pb, time_code);
1281     put_be32(pb, 0); // binary group data
1282     put_be64(pb, 0);
1283
1284     // write system metadata package set
1285     put_buffer(pb, system_metadata_package_set_key, 16);
1286     klv_encode_ber_length(pb, 35);
1287     put_byte(pb, 0x83); // UMID
1288     put_be16(pb, 0x20);
1289     mxf_write_umid(pb, SourcePackage, 0);
1290 }
1291
1292 static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
1293 {
1294     MXFContext *mxf = s->priv_data;
1295     ByteIOContext *pb = s->pb;
1296     AVStream *st = s->streams[pkt->stream_index];
1297     MXFStreamContext *sc = st->priv_data;
1298
1299     if (!(mxf->edit_units_count % MXF_INDEX_CLUSTER_SIZE)) {
1300         mxf->index_entries = av_realloc(mxf->index_entries,
1301             (mxf->edit_units_count + MXF_INDEX_CLUSTER_SIZE)*
1302              sizeof(*mxf->index_entries));
1303         if (!mxf->index_entries) {
1304             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");
1305             return -1;
1306         }
1307     }
1308
1309     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
1310         if (!mxf_parse_mpeg2_frame(s, st, pkt)) {
1311             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
1312             return -1;
1313         }
1314     }
1315
1316     if (!mxf->header_written) {
1317         mxf_write_partition(s, 1, 0, 0, header_open_partition_key, 1);
1318         mxf->header_written = 1;
1319     }
1320
1321     mxf_write_klv_fill(s);
1322
1323     if (st->index == 0) {
1324         mxf->index_entries[mxf->edit_units_count].offset = url_ftell(pb);
1325
1326         mxf_write_system_item(s);
1327         mxf_write_klv_fill(s);
1328
1329         mxf->edit_units_count++;
1330     } else if (st->index == 1) {
1331         mxf->index_entries[mxf->edit_units_count-1].slice_offset =
1332             url_ftell(pb) - mxf->index_entries[mxf->edit_units_count-1].offset;
1333     }
1334
1335     put_buffer(pb, sc->track_essence_element_key, 16); // write key
1336     klv_encode_ber_length(pb, pkt->size); // write length
1337     put_buffer(pb, pkt->data, pkt->size); // write value
1338
1339     sc->duration = FFMAX(pkt->pts + pkt->duration, sc->duration);
1340
1341     put_flush_packet(pb);
1342     return 0;
1343 }
1344
1345 static void mxf_write_random_index_pack(AVFormatContext *s)
1346 {
1347     MXFContext *mxf = s->priv_data;
1348     ByteIOContext *pb = s->pb;
1349     uint64_t pos = url_ftell(pb);
1350
1351     put_buffer(pb, random_index_pack_key, 16);
1352     klv_encode_ber_length(pb, 28);
1353
1354     put_be32(pb, 1); // BodySID of header partition
1355     put_be64(pb, 0); // offset of header partition
1356
1357     put_be32(pb, 0); // BodySID of footer partition
1358     put_be64(pb, mxf->footer_partition_offset);
1359
1360     put_be32(pb, url_ftell(pb) - pos + 4);
1361 }
1362
1363 static int mxf_write_footer(AVFormatContext *s)
1364 {
1365     MXFContext *mxf = s->priv_data;
1366     ByteIOContext *pb = s->pb;
1367     unsigned index_byte_count =
1368         109 + (s->nb_streams+1)*6 +
1369         mxf->edit_units_count*(11+mxf->slice_count*4);
1370
1371     // add encoded ber length
1372     index_byte_count += 16 + klv_ber_length(index_byte_count);
1373     index_byte_count += klv_fill_size(index_byte_count);
1374
1375     mxf_write_klv_fill(s);
1376
1377     mxf->footer_partition_offset = url_ftell(pb);
1378     mxf_write_partition(s, 0, 2, index_byte_count, footer_partition_key, 0);
1379
1380     mxf_write_klv_fill(s);
1381
1382     mxf_write_index_table_segment(s);
1383
1384     mxf_write_klv_fill(s);
1385
1386     mxf_write_random_index_pack(s);
1387
1388     if (!url_is_streamed(s->pb)) {
1389         url_fseek(pb, 0, SEEK_SET);
1390         mxf_write_partition(s, 1, 0, 0, header_closed_partition_key, 1);
1391     }
1392
1393     ff_audio_interleave_close(s);
1394
1395     av_freep(&mxf->index_entries);
1396
1397     mxf_free(s);
1398     return 0;
1399 }
1400
1401 static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1402 {
1403     AVPacketList *pktl;
1404     int stream_count = 0;
1405     int streams[MAX_STREAMS];
1406
1407     memset(streams, 0, sizeof(streams));
1408     pktl = s->packet_buffer;
1409     while (pktl) {
1410         //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);
1411         if (!streams[pktl->pkt.stream_index])
1412             stream_count++;
1413         streams[pktl->pkt.stream_index]++;
1414         pktl = pktl->next;
1415     }
1416
1417     if (stream_count && (s->nb_streams == stream_count || flush)) {
1418         pktl = s->packet_buffer;
1419         if (s->nb_streams != stream_count) {
1420             AVPacketList *first = NULL;
1421             // find first packet in edit unit
1422             while (pktl) {
1423                 AVStream *st = s->streams[pktl->pkt.stream_index];
1424                 if (st->index == 0)
1425                     break;
1426                 else if (!first)
1427                     first = pktl;
1428                 pktl = pktl->next;
1429             }
1430             // purge packet queue
1431             while (pktl) {
1432                 AVPacketList *next = pktl->next;
1433                 av_free_packet(&pktl->pkt);
1434                 av_freep(&pktl);
1435                 pktl = next;
1436             }
1437             if (!first)
1438                 goto out;
1439             pktl = first;
1440         }
1441
1442         *out = pktl->pkt;
1443         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);
1444         s->packet_buffer = pktl->next;
1445         av_freep(&pktl);
1446         return 1;
1447     } else {
1448     out:
1449         av_init_packet(out);
1450         return 0;
1451     }
1452 }
1453
1454 static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
1455 {
1456     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;
1457     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;
1458
1459     return next->dts > pkt->dts ||
1460         (next->dts == pkt->dts && sc->order < sc2->order);
1461 }
1462
1463 static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1464 {
1465     return ff_audio_rechunk_interleave(s, out, pkt, flush,
1466                                mxf_interleave_get_packet, mxf_compare_timestamps);
1467 }
1468
1469 AVOutputFormat mxf_muxer = {
1470     "mxf",
1471     NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1472     NULL,
1473     "mxf",
1474     sizeof(MXFContext),
1475     CODEC_ID_PCM_S16LE,
1476     CODEC_ID_MPEG2VIDEO,
1477     mxf_write_header,
1478     mxf_write_packet,
1479     mxf_write_footer,
1480     AVFMT_NOTIMESTAMPS,
1481     NULL,
1482     mxf_interleave,
1483 };