git.sesse.net Git - ffmpeg/blob - libavformat/mxfenc.c

   1 /*
   2  * MXF muxer
   3  * Copyright (c) 2008 GUCAS, Zhentan Feng <spyfeng at gmail dot com>
   4  * Copyright (c) 2008 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 /*
  24  * References
  25  * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
  26  * SMPTE 377M MXF File Format Specifications
  27  * SMPTE 379M MXF Generic Container
  28  * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
  29  * SMPTE RP210: SMPTE Metadata Dictionary
  30  * SMPTE RP224: Registry of SMPTE Universal Labels
  31  */
  32
  33 //#define DEBUG
  34
  35 #include <math.h>
  36
  37 #include "libavutil/fifo.h"
  38 #include "mxf.h"
  39
  40 static const int NTSC_samples_per_frame[] = { 1602, 1601, 1602, 1601, 1602, 0 };
  41 static const int PAL_samples_per_frame[]  = { 1920, 0 };
  42
  43 #define MXF_INDEX_CLUSTER_SIZE 4096
  44
  45 typedef struct {
  46     AVFifoBuffer fifo;
  47     unsigned fifo_size;           ///< current fifo size allocated
  48     uint64_t dts;                 ///< current dts
  49     int sample_size;              ///< size of one sample all channels included
  50     const int *samples_per_frame; ///< must be 0 terminated
  51     const int *samples;           ///< current samples per frame, pointer to samples_per_frame
  52 } AudioInterleaveContext;
  53
  54 typedef struct {
  55     int local_tag;
  56     UID uid;
  57 } MXFLocalTagPair;
  58
  59 typedef struct {
  60     uint8_t flags;
  61     uint64_t offset;
  62     unsigned slice_offset[17]; // one video, 16 audio
  63 } MXFIndexEntry;
  64
  65 typedef struct {
  66     AudioInterleaveContext aic;
  67     UID track_essence_element_key;
  68     int index;            ///< index in mxf_essence_container_uls table
  69     const UID *codec_ul;
  70     int64_t duration;
  71     int order;            ///< interleaving order if dts are equal
  72     int interlaced;       ///< wether picture is interlaced
  73     int temporal_reordering;
  74 } MXFStreamContext;
  75
  76 typedef struct {
  77     UID container_ul;
  78     UID element_ul;
  79     UID codec_ul;
  80     void (*write_desc)();
  81 } MXFContainerEssenceEntry;
  82
  83 static const struct {
  84     enum CodecID id;
  85     int index;
  86 } mxf_essence_mappings[] = {
  87     { CODEC_ID_MPEG2VIDEO, 0 },
  88     { CODEC_ID_PCM_S24LE,  1 },
  89     { CODEC_ID_PCM_S16LE,  1 },
  90     { 0 }
  91 };
  92
  93 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st);
  94 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st);
  95 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st);
  96
  97 static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {
  98     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },
  99       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },
 100       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },
 101       mxf_write_mpegvideo_desc },
 102     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },
 103       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },
 104       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 105       mxf_write_aes3_desc },
 106     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },
 107       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },
 108       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 109       mxf_write_wav_desc },
 110     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
 111       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
 112       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
 113       NULL },
 114 };
 115
 116 typedef struct MXFContext {
 117     int64_t footer_partition_offset;
 118     int essence_container_count;
 119     uint8_t essence_containers_indices[FF_ARRAY_ELEMS(mxf_essence_container_uls)];
 120     AVRational time_base;
 121     int header_written;
 122     MXFIndexEntry *index_entries;
 123     unsigned edit_units_count;
 124     int edit_unit_start;  ///< index of the stream starting edit unit
 125 } MXFContext;
 126
 127 static const uint8_t uuid_base[]            = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };
 128 static const uint8_t umid_base[]            = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x01,0x0D,0x00,0x13,0x00,0x00,0x00 };
 129
 130 /**
 131  * complete key for operation pattern, partitions, and primer pack
 132  */
 133 static const uint8_t op1a_ul[]                     = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x01,0x00 };
 134 static const uint8_t footer_partition_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }; // ClosedComplete
 135 static const uint8_t primer_pack_key[]             = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x05,0x01,0x00 };
 136 static const uint8_t index_table_segment_key[]     = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 };
 137 static const uint8_t random_index_pack_key[]       = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
 138 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
 139 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
 140
 141 /**
 142  * partial key for header metadata
 143  */
 144 static const uint8_t header_metadata_key[]  = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01 };
 145 static const uint8_t multiple_desc_ul[]     = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x0D,0x01,0x03,0x01,0x02,0x7F,0x01,0x00 };
 146
 147 /**
 148  * SMPTE RP210 http://www.smpte-ra.org/mdd/index.html
 149  */
 150 static const MXFLocalTagPair mxf_local_tag_batch[] = {
 151     // preface set
 152     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */
 153     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */
 154     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */
 155     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */
 156     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */
 157     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */
 158     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */
 159     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */
 160     // Identification
 161     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */
 162     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */
 163     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */
 164     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */
 165     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */
 166     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */
 167     // Content Storage
 168     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */
 169     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */
 170     // Essence Container Data
 171     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */
 172     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */
 173     // Package
 174     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */
 175     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */
 176     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */
 177     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */
 178     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */
 179     // Track
 180     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */
 181     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */
 182     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */
 183     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */
 184     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */
 185     // Sequence
 186     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */
 187     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */
 188     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */
 189     // Source Clip
 190     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */
 191     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */
 192     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */
 193     // File Descriptor
 194     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */
 195     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */
 196     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */
 197     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */
 198     // Generic Picture Essence Descriptor
 199     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */
 200     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */
 201     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */
 202     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */
 203     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */
 204     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */
 205     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */
 206     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */
 207     // Generic Sound Essence Descriptor
 208     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */
 209     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */
 210     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */
 211     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */
 212     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */
 213     // Index Table Segment
 214     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */
 215     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */
 216     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */
 217     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */
 218     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */
 219     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */
 220     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */
 221     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */
 222     // MPEG video Descriptor
 223     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */
 224     // Wave Audio Essence Descriptor
 225     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */
 226     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */
 227 };
 228
 229 static void mxf_write_uuid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
 230 {
 231     put_buffer(pb, uuid_base, 12);
 232     put_be16(pb, type);
 233     put_be16(pb, value);
 234 }
 235
 236 static void mxf_write_umid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
 237 {
 238     put_buffer(pb, umid_base, 16);
 239     mxf_write_uuid(pb, type, value);
 240 }
 241
 242 static void mxf_write_refs_count(ByteIOContext *pb, int ref_count)
 243 {
 244     put_be32(pb, ref_count);
 245     put_be32(pb, 16);
 246 }
 247
 248 static int klv_encode_ber_length(ByteIOContext *pb, uint64_t len)
 249 {
 250     // Determine the best BER size
 251     int size;
 252     if (len < 128) {
 253         //short form
 254         put_byte(pb, len);
 255         return 1;
 256     }
 257
 258     size = (av_log2(len) >> 3) + 1;
 259
 260     // long form
 261     put_byte(pb, 0x80 + size);
 262     while(size) {
 263         size--;
 264         put_byte(pb, len >> 8 * size & 0xff);
 265     }
 266     return 0;
 267 }
 268
 269 /*
 270  * Get essence container ul index
 271  */
 272 static int mxf_get_essence_container_ul_index(enum CodecID id)
 273 {
 274     int i;
 275     for (i = 0; mxf_essence_mappings[i].id; i++)
 276         if (mxf_essence_mappings[i].id == id)
 277             return mxf_essence_mappings[i].index;
 278     return -1;
 279 }
 280
 281 static void mxf_write_primer_pack(AVFormatContext *s)
 282 {
 283     ByteIOContext *pb = s->pb;
 284     int local_tag_number, i = 0;
 285
 286     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);
 287
 288     put_buffer(pb, primer_pack_key, 16);
 289     klv_encode_ber_length(pb, local_tag_number * 18 + 8);
 290
 291     put_be32(pb, local_tag_number); // local_tag num
 292     put_be32(pb, 18); // item size, always 18 according to the specs
 293
 294     for (i = 0; i < local_tag_number; i++) {
 295         put_be16(pb, mxf_local_tag_batch[i].local_tag);
 296         put_buffer(pb, mxf_local_tag_batch[i].uid, 16);
 297     }
 298 }
 299
 300 static void mxf_write_local_tag(ByteIOContext *pb, int size, int tag)
 301 {
 302     put_be16(pb, tag);
 303     put_be16(pb, size);
 304 }
 305
 306 static void mxf_write_metadata_key(ByteIOContext *pb, unsigned int value)
 307 {
 308     put_buffer(pb, header_metadata_key, 13);
 309     put_be24(pb, value);
 310 }
 311
 312 static void mxf_free(AVFormatContext *s)
 313 {
 314     int i;
 315
 316     for (i = 0; i < s->nb_streams; i++) {
 317         AVStream *st = s->streams[i];
 318         av_freep(&st->priv_data);
 319     }
 320 }
 321
 322 static const MXFDataDefinitionUL *mxf_get_data_definition_ul(enum CodecType type)
 323 {
 324     const MXFDataDefinitionUL *uls = ff_mxf_data_definition_uls;
 325     while (uls->type != CODEC_TYPE_DATA) {
 326         if (type == uls->type)
 327             break;
 328         uls++;
 329     }
 330     return uls;
 331 }
 332
 333 static void mxf_write_essence_container_refs(AVFormatContext *s)
 334 {
 335     MXFContext *c = s->priv_data;
 336     ByteIOContext *pb = s->pb;
 337     int i;
 338
 339     mxf_write_refs_count(pb, c->essence_container_count);
 340     av_log(s,AV_LOG_DEBUG, "essence container count:%d\n", c->essence_container_count);
 341     for (i = 0; i < c->essence_container_count; i++) {
 342         put_buffer(pb, mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul, 16);
 343         PRINT_KEY(s, "essence container ul:\n", mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul);
 344     }
 345 }
 346
 347 static void mxf_write_preface(AVFormatContext *s)
 348 {
 349     MXFContext *mxf = s->priv_data;
 350     ByteIOContext *pb = s->pb;
 351
 352     mxf_write_metadata_key(pb, 0x012f00);
 353     PRINT_KEY(s, "preface key", pb->buf_ptr - 16);
 354     klv_encode_ber_length(pb, 130 + 16 * mxf->essence_container_count);
 355
 356     // write preface set uid
 357     mxf_write_local_tag(pb, 16, 0x3C0A);
 358     mxf_write_uuid(pb, Preface, 0);
 359     PRINT_KEY(s, "preface uid", pb->buf_ptr - 16);
 360
 361     // write create date as unknown
 362     mxf_write_local_tag(pb, 8, 0x3B02);
 363     put_be64(pb, 0);
 364
 365     // write version
 366     mxf_write_local_tag(pb, 2, 0x3B05);
 367     put_be16(pb, 1);
 368
 369     // write identification_refs
 370     mxf_write_local_tag(pb, 16 + 8, 0x3B06);
 371     mxf_write_refs_count(pb, 1);
 372     mxf_write_uuid(pb, Identification, 0);
 373
 374     // write content_storage_refs
 375     mxf_write_local_tag(pb, 16, 0x3B03);
 376     mxf_write_uuid(pb, ContentStorage, 0);
 377
 378     mxf_write_local_tag(pb, 16, 0x3B09);
 379     put_buffer(pb, op1a_ul, 16);
 380
 381     // write essence_container_refs
 382     mxf_write_local_tag(pb, 8 + 16 * mxf->essence_container_count, 0x3B0A);
 383     mxf_write_essence_container_refs(s);
 384
 385     // write dm_scheme_refs
 386     mxf_write_local_tag(pb, 8, 0x3B0B);
 387     put_be64(pb, 0);
 388 }
 389
 390 /*
 391  * Write a local tag containing an ascii string as utf-16
 392  */
 393 static void mxf_write_local_tag_utf16(ByteIOContext *pb, int tag, const char *value)
 394 {
 395     int i, size = strlen(value);
 396     mxf_write_local_tag(pb, size*2, tag);
 397     for (i = 0; i < size; i++)
 398         put_be16(pb, value[i]);
 399 }
 400
 401 static void mxf_write_identification(AVFormatContext *s)
 402 {
 403     ByteIOContext *pb = s->pb;
 404     const char *company = "FFmpeg";
 405     const char *product = "OP1a Muxer";
 406     const char *version;
 407     int length;
 408
 409     mxf_write_metadata_key(pb, 0x013000);
 410     PRINT_KEY(s, "identification key", pb->buf_ptr - 16);
 411
 412     version = s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT ?
 413         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);
 414     length = 84 + (strlen(company)+strlen(product)+strlen(version))*2; // utf-16
 415     klv_encode_ber_length(pb, length);
 416
 417     // write uid
 418     mxf_write_local_tag(pb, 16, 0x3C0A);
 419     mxf_write_uuid(pb, Identification, 0);
 420     PRINT_KEY(s, "identification uid", pb->buf_ptr - 16);
 421
 422     // write generation uid
 423     mxf_write_local_tag(pb, 16, 0x3C09);
 424     mxf_write_uuid(pb, Identification, 1);
 425
 426     mxf_write_local_tag_utf16(pb, 0x3C01, company); // Company Name
 427     mxf_write_local_tag_utf16(pb, 0x3C02, product); // Product Name
 428     mxf_write_local_tag_utf16(pb, 0x3C04, version); // Version String
 429
 430     // write product uid
 431     mxf_write_local_tag(pb, 16, 0x3C05);
 432     mxf_write_uuid(pb, Identification, 2);
 433
 434     // write modified date
 435     mxf_write_local_tag(pb, 8, 0x3C06);
 436     put_be64(pb, 0);
 437 }
 438
 439 static void mxf_write_content_storage(AVFormatContext *s)
 440 {
 441     ByteIOContext *pb = s->pb;
 442
 443     mxf_write_metadata_key(pb, 0x011800);
 444     PRINT_KEY(s, "content storage key", pb->buf_ptr - 16);
 445     klv_encode_ber_length(pb, 92);
 446
 447     // write uid
 448     mxf_write_local_tag(pb, 16, 0x3C0A);
 449     mxf_write_uuid(pb, ContentStorage, 0);
 450     PRINT_KEY(s, "content storage uid", pb->buf_ptr - 16);
 451
 452     // write package reference
 453     mxf_write_local_tag(pb, 16 * 2 + 8, 0x1901);
 454     mxf_write_refs_count(pb, 2);
 455     mxf_write_uuid(pb, MaterialPackage, 0);
 456     mxf_write_uuid(pb, SourcePackage, 0);
 457
 458     // write essence container data
 459     mxf_write_local_tag(pb, 8 + 16, 0x1902);
 460     mxf_write_refs_count(pb, 1);
 461     mxf_write_uuid(pb, EssenceContainerData, 0);
 462 }
 463
 464 static void mxf_write_track(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 465 {
 466     ByteIOContext *pb = s->pb;
 467     MXFStreamContext *sc = st->priv_data;
 468
 469     mxf_write_metadata_key(pb, 0x013b00);
 470     PRINT_KEY(s, "track key", pb->buf_ptr - 16);
 471     klv_encode_ber_length(pb, 80);
 472
 473     // write track uid
 474     mxf_write_local_tag(pb, 16, 0x3C0A);
 475     mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, st->index);
 476     PRINT_KEY(s, "track uid", pb->buf_ptr - 16);
 477
 478     // write track id
 479     mxf_write_local_tag(pb, 4, 0x4801);
 480     put_be32(pb, st->index);
 481
 482     // write track number
 483     mxf_write_local_tag(pb, 4, 0x4804);
 484     if (type == MaterialPackage)
 485         put_be32(pb, 0); // track number of material package is 0
 486     else
 487         put_buffer(pb, sc->track_essence_element_key + 12, 4);
 488
 489     mxf_write_local_tag(pb, 8, 0x4B01);
 490     put_be32(pb, st->time_base.den);
 491     put_be32(pb, st->time_base.num);
 492
 493     // write origin
 494     mxf_write_local_tag(pb, 8, 0x4B02);
 495     put_be64(pb, 0);
 496
 497     // write sequence refs
 498     mxf_write_local_tag(pb, 16, 0x4803);
 499     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 500 }
 501
 502 static void mxf_write_common_fields(ByteIOContext *pb, AVStream *st)
 503 {
 504     const MXFDataDefinitionUL *data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);
 505     MXFStreamContext *sc = st->priv_data;
 506
 507     // find data define uls
 508     mxf_write_local_tag(pb, 16, 0x0201);
 509     put_buffer(pb, data_def_ul->uid, 16);
 510
 511     // write duration
 512     mxf_write_local_tag(pb, 8, 0x0202);
 513     put_be64(pb, sc->duration);
 514 }
 515
 516 static void mxf_write_sequence(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 517 {
 518     ByteIOContext *pb = s->pb;
 519
 520     mxf_write_metadata_key(pb, 0x010f00);
 521     PRINT_KEY(s, "sequence key", pb->buf_ptr - 16);
 522     klv_encode_ber_length(pb, 80);
 523
 524     mxf_write_local_tag(pb, 16, 0x3C0A);
 525     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 526
 527     PRINT_KEY(s, "sequence uid", pb->buf_ptr - 16);
 528     mxf_write_common_fields(pb, st);
 529
 530     // write structural component
 531     mxf_write_local_tag(pb, 16 + 8, 0x1001);
 532     mxf_write_refs_count(pb, 1);
 533     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
 534 }
 535
 536 static void mxf_write_structural_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 537 {
 538     ByteIOContext *pb = s->pb;
 539     int i;
 540
 541     mxf_write_metadata_key(pb, 0x011100);
 542     PRINT_KEY(s, "sturctural component key", pb->buf_ptr - 16);
 543     klv_encode_ber_length(pb, 108);
 544
 545     // write uid
 546     mxf_write_local_tag(pb, 16, 0x3C0A);
 547     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
 548
 549     PRINT_KEY(s, "structural component uid", pb->buf_ptr - 16);
 550     mxf_write_common_fields(pb, st);
 551
 552     // write start_position
 553     mxf_write_local_tag(pb, 8, 0x1201);
 554     put_be64(pb, 0);
 555
 556     // write source package uid, end of the reference
 557     mxf_write_local_tag(pb, 32, 0x1101);
 558     if (type == SourcePackage) {
 559         for (i = 0; i < 4; i++)
 560             put_be64(pb, 0);
 561     } else
 562         mxf_write_umid(pb, SourcePackage, 0);
 563
 564     // write source track id
 565     mxf_write_local_tag(pb, 4, 0x1102);
 566     if (type == SourcePackage)
 567         put_be32(pb, 0);
 568     else
 569         put_be32(pb, st->index);
 570 }
 571
 572 static void mxf_write_multi_descriptor(AVFormatContext *s)
 573 {
 574     ByteIOContext *pb = s->pb;
 575     int i;
 576
 577     mxf_write_metadata_key(pb, 0x014400);
 578     PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);
 579     klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);
 580
 581     mxf_write_local_tag(pb, 16, 0x3C0A);
 582     mxf_write_uuid(pb, MultipleDescriptor, 0);
 583     PRINT_KEY(s, "multi_desc uid", pb->buf_ptr - 16);
 584
 585     // write sample rate
 586     mxf_write_local_tag(pb, 8, 0x3001);
 587     put_be32(pb, s->streams[0]->time_base.den);
 588     put_be32(pb, s->streams[0]->time_base.num);
 589
 590     // write essence container ul
 591     mxf_write_local_tag(pb, 16, 0x3004);
 592     put_buffer(pb, multiple_desc_ul, 16);
 593
 594     // write sub descriptor refs
 595     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x3F01);
 596     mxf_write_refs_count(pb, s->nb_streams);
 597     for (i = 0; i < s->nb_streams; i++)
 598         mxf_write_uuid(pb, SubDescriptor, i);
 599 }
 600
 601 static void mxf_write_generic_desc(ByteIOContext *pb, AVStream *st, const UID key, unsigned size)
 602 {
 603     MXFStreamContext *sc = st->priv_data;
 604
 605     put_buffer(pb, key, 16);
 606     klv_encode_ber_length(pb, size);
 607
 608     mxf_write_local_tag(pb, 16, 0x3C0A);
 609     mxf_write_uuid(pb, SubDescriptor, st->index);
 610
 611     mxf_write_local_tag(pb, 4, 0x3006);
 612     put_be32(pb, st->index);
 613
 614     mxf_write_local_tag(pb, 8, 0x3001);
 615     put_be32(pb, st->time_base.den);
 616     put_be32(pb, st->time_base.num);
 617
 618     mxf_write_local_tag(pb, 16, 0x3004);
 619     put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
 620 }
 621
 622 static const UID mxf_mpegvideo_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 };
 623 static const UID mxf_wav_descriptor_key       = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 };
 624 static const UID mxf_aes3_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 };
 625
 626 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
 627 {
 628     MXFStreamContext *sc = st->priv_data;
 629     ByteIOContext *pb = s->pb;
 630     int stored_height = (st->codec->height+15)/16*16;
 631     AVRational dar;
 632     int f1, f2;
 633
 634     mxf_write_generic_desc(pb, st, mxf_mpegvideo_descriptor_key, 153+sc->interlaced*4);
 635
 636     mxf_write_local_tag(pb, 4, 0x3203);
 637     put_be32(pb, st->codec->width);
 638
 639     mxf_write_local_tag(pb, 4, 0x3202);
 640     put_be32(pb, stored_height>>sc->interlaced);
 641
 642     mxf_write_local_tag(pb, 4, 0x3209);
 643     put_be32(pb, st->codec->width);
 644
 645     mxf_write_local_tag(pb, 4, 0x3208);
 646     put_be32(pb, st->codec->height>>sc->interlaced);
 647
 648     // bit rate
 649     mxf_write_local_tag(pb, 4, 0x8000);
 650     put_be32(pb, st->codec->bit_rate);
 651
 652     // frame layout
 653     mxf_write_local_tag(pb, 1, 0x320C);
 654     put_byte(pb, sc->interlaced);
 655
 656     // video line map
 657     switch (st->codec->height) {
 658     case  576: f1 = 23; f2 = 336; break;
 659     case  608: f1 =  7; f2 = 320; break;
 660     case  480: f1 = 20; f2 = 283; break;
 661     case  512: f1 =  7; f2 = 270; break;
 662     case  720: f1 = 26; f2 =   0; break; // progressive
 663     case 1080: f1 = 21; f2 = 584; break;
 664     default:   f1 =  0; f2 =   0; break;
 665     }
 666
 667     if (!sc->interlaced) {
 668         f2  = 0;
 669         f1 *= 2;
 670     }
 671
 672     mxf_write_local_tag(pb, 12+sc->interlaced*4, 0x320D);
 673     put_be32(pb, sc->interlaced ? 2 : 1);
 674     put_be32(pb, 4);
 675     put_be32(pb, f1);
 676     if (sc->interlaced)
 677         put_be32(pb, f2);
 678
 679     av_reduce(&dar.num, &dar.den,
 680               st->codec->width*st->codec->sample_aspect_ratio.num,
 681               st->codec->height*st->codec->sample_aspect_ratio.den,
 682               1024*1024);
 683
 684     mxf_write_local_tag(pb, 8, 0x320E);
 685     put_be32(pb, dar.num);
 686     put_be32(pb, dar.den);
 687
 688     mxf_write_local_tag(pb, 16, 0x3201);
 689     put_buffer(pb, *sc->codec_ul, 16);
 690 }
 691
 692 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 693 {
 694     ByteIOContext *pb = s->pb;
 695
 696     mxf_write_generic_desc(pb, st, key, size);
 697
 698     // audio locked
 699     mxf_write_local_tag(pb, 1, 0x3D02);
 700     put_byte(pb, 1);
 701
 702     // write audio sampling rate
 703     mxf_write_local_tag(pb, 8, 0x3D03);
 704     put_be32(pb, st->codec->sample_rate);
 705     put_be32(pb, 1);
 706
 707     mxf_write_local_tag(pb, 4, 0x3D07);
 708     put_be32(pb, st->codec->channels);
 709
 710     mxf_write_local_tag(pb, 4, 0x3D01);
 711     put_be32(pb, av_get_bits_per_sample(st->codec->codec_id));
 712 }
 713
 714 static void mxf_write_wav_common_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 715 {
 716     ByteIOContext *pb = s->pb;
 717
 718     mxf_write_generic_sound_desc(s, st, key, size);
 719
 720     mxf_write_local_tag(pb, 2, 0x3D0A);
 721     put_be16(pb, st->codec->block_align);
 722
 723     // avg bytes per sec
 724     mxf_write_local_tag(pb, 4, 0x3D09);
 725     put_be32(pb, st->codec->block_align*st->codec->sample_rate);
 726 }
 727
 728 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)
 729 {
 730     mxf_write_wav_common_desc(s, st, mxf_wav_descriptor_key, 107);
 731 }
 732
 733 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)
 734 {
 735     mxf_write_wav_common_desc(s, st, mxf_aes3_descriptor_key, 107);
 736 }
 737
 738 static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)
 739 {
 740     ByteIOContext *pb = s->pb;
 741     int i;
 742
 743     if (type == MaterialPackage) {
 744         mxf_write_metadata_key(pb, 0x013600);
 745         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);
 746         klv_encode_ber_length(pb, 92 + 16 * s->nb_streams);
 747     } else {
 748         mxf_write_metadata_key(pb, 0x013700);
 749         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);
 750         klv_encode_ber_length(pb, 112 + 16 * s->nb_streams); // 20 bytes length for descriptor reference
 751     }
 752
 753     // write uid
 754     mxf_write_local_tag(pb, 16, 0x3C0A);
 755     mxf_write_uuid(pb, type, 0);
 756     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);
 757     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);
 758
 759     // write package umid
 760     mxf_write_local_tag(pb, 32, 0x4401);
 761     mxf_write_umid(pb, type, 0);
 762     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);
 763
 764     // write create date
 765     mxf_write_local_tag(pb, 8, 0x4405);
 766     put_be64(pb, 0);
 767
 768     // write modified date
 769     mxf_write_local_tag(pb, 8, 0x4404);
 770     put_be64(pb, 0);
 771
 772     // write track refs
 773     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x4403);
 774     mxf_write_refs_count(pb, s->nb_streams);
 775     for (i = 0; i < s->nb_streams; i++)
 776         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);
 777
 778     // write multiple descriptor reference
 779     if (type == SourcePackage) {
 780         mxf_write_local_tag(pb, 16, 0x4701);
 781         if (s->nb_streams > 1) {
 782             mxf_write_uuid(pb, MultipleDescriptor, 0);
 783             mxf_write_multi_descriptor(s);
 784         } else
 785             mxf_write_uuid(pb, SubDescriptor, 0);
 786     }
 787
 788     for (i = 0; i < s->nb_streams; i++) {
 789         AVStream *st = s->streams[i];
 790         mxf_write_track(s, st, type);
 791         mxf_write_sequence(s, st, type);
 792         mxf_write_structural_component(s, st, type);
 793
 794         if (type == SourcePackage) {
 795             MXFStreamContext *sc = st->priv_data;
 796             mxf_essence_container_uls[sc->index].write_desc(s, st);
 797         }
 798     }
 799 }
 800
 801 static int mxf_write_essence_container_data(AVFormatContext *s)
 802 {
 803     ByteIOContext *pb = s->pb;
 804
 805     mxf_write_metadata_key(pb, 0x012300);
 806     klv_encode_ber_length(pb, 72);
 807
 808     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID
 809     mxf_write_uuid(pb, EssenceContainerData, 0);
 810
 811     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID
 812     mxf_write_umid(pb, SourcePackage, 0);
 813
 814     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID
 815     put_be32(pb, 1);
 816
 817     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID
 818     put_be32(pb, 2);
 819
 820     return 0;
 821 }
 822
 823 static int mxf_write_header_metadata_sets(AVFormatContext *s)
 824 {
 825     mxf_write_preface(s);
 826     mxf_write_identification(s);
 827     mxf_write_content_storage(s);
 828     mxf_write_package(s, MaterialPackage);
 829     mxf_write_package(s, SourcePackage);
 830     mxf_write_essence_container_data(s);
 831     return 0;
 832 }
 833
 834 static int mxf_write_index_table_segment(AVFormatContext *s)
 835 {
 836     MXFContext *mxf = s->priv_data;
 837     ByteIOContext *pb = s->pb;
 838     int i, j, k, ret, key_offset = 0;
 839     int temporal_reordering = 0;
 840
 841     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);
 842
 843     put_buffer(pb, index_table_segment_key, 16);
 844     ret = klv_encode_ber_length(pb, 109 + s->nb_streams*6 +
 845                                 mxf->edit_units_count*(11+(s->nb_streams-1)*4));
 846
 847     // instance id
 848     mxf_write_local_tag(pb, 16, 0x3C0A);
 849     mxf_write_uuid(pb, IndexTableSegment, 0);
 850
 851     // index edit rate
 852     mxf_write_local_tag(pb, 8, 0x3F0B);
 853     put_be32(pb, mxf->time_base.num);
 854     put_be32(pb, mxf->time_base.den);
 855
 856     // index start position
 857     mxf_write_local_tag(pb, 8, 0x3F0C);
 858     put_be64(pb, 0);
 859
 860     // index duration
 861     mxf_write_local_tag(pb, 8, 0x3F0D);
 862     put_be64(pb, mxf->edit_units_count);
 863
 864     // edit unit byte count
 865     mxf_write_local_tag(pb, 4, 0x3F05);
 866     put_be32(pb, 0);
 867
 868     // index sid
 869     mxf_write_local_tag(pb, 4, 0x3F06);
 870     put_be32(pb, 2);
 871
 872     // body sid
 873     mxf_write_local_tag(pb, 4, 0x3F07);
 874     put_be32(pb, 1);
 875
 876     // slice count - 1
 877     mxf_write_local_tag(pb, 1, 0x3F08);
 878     put_byte(pb, s->nb_streams-1);
 879
 880     // delta entry array
 881     mxf_write_local_tag(pb, 8 + s->nb_streams*6, 0x3F09);
 882     put_be32(pb, s->nb_streams); // num of entries
 883     put_be32(pb, 6);             // size of one entry
 884     for (i = 0; i < s->nb_streams; i++) {
 885         AVStream *st = s->streams[i];
 886         MXFStreamContext *sc = st->priv_data;
 887         put_byte(pb, sc->temporal_reordering);
 888         if (sc->temporal_reordering)
 889             temporal_reordering = 1;
 890         put_byte(pb, i);
 891         put_be32(pb, 0); // element delta
 892     }
 893
 894     mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+(s->nb_streams-1)*4), 0x3F0A);
 895     put_be32(pb, mxf->edit_units_count);  // num of entries
 896     put_be32(pb, 11+(s->nb_streams-1)*4); // size of one entry
 897     for (i = 0; i < mxf->edit_units_count; i++) {
 898         if (mxf->index_entries[i].flags & 0x40)
 899             key_offset = 0;
 900         if (temporal_reordering) {
 901             int temporal_offset = 0;
 902             for (j = i+1; j < mxf->edit_units_count; j++) {
 903                 temporal_offset++;
 904                 if (mxf->index_entries[j].flags & 0x10) { // backward prediction
 905                     // next is not b, so is reordered
 906                     if (!(mxf->index_entries[i+1].flags & 0x10)) {
 907                         if ((mxf->index_entries[i].flags & 0x11) == 0) // i frame
 908                             temporal_offset = 0;
 909                         else
 910                             temporal_offset = -temporal_offset;
 911                     }
 912                     break;
 913                 }
 914             }
 915             put_byte(pb, temporal_offset);
 916         } else
 917             put_byte(pb, 0);
 918         put_byte(pb, key_offset);
 919         put_byte(pb, mxf->index_entries[i].flags);
 920         // stream offset
 921         put_be64(pb, mxf->index_entries[i].offset - mxf->index_entries[0].offset);
 922         for (k = 0; k < s->nb_streams; k++) {
 923             if (mxf->index_entries[i].slice_offset[k])
 924                 put_be32(pb, mxf->index_entries[i].slice_offset[k]);
 925         }
 926         key_offset--;
 927     }
 928
 929     return ret;
 930 }
 931
 932 static void mxf_write_partition(AVFormatContext *s, int bodysid, int indexsid,
 933                                 const uint8_t *key, int write_metadata)
 934 {
 935     MXFContext *mxf = s->priv_data;
 936     ByteIOContext *pb = s->pb;
 937     int64_t header_byte_count_offset;
 938
 939     // write klv
 940     put_buffer(pb, key, 16);
 941
 942     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);
 943
 944     // write partition value
 945     put_be16(pb, 1); // majorVersion
 946     put_be16(pb, 2); // minorVersion
 947     put_be32(pb, 1); // kagSize
 948
 949     put_be64(pb, url_ftell(pb) - 25); // thisPartition
 950     put_be64(pb, 0); // previousPartition
 951
 952     put_be64(pb, mxf->footer_partition_offset); // footerPartition
 953
 954     // set offset
 955     header_byte_count_offset = url_ftell(pb);
 956     put_be64(pb, 0); // headerByteCount, update later
 957
 958     // indexTable
 959     put_be64(pb, indexsid ? 19 + 109 + s->nb_streams*6 +
 960              mxf->edit_units_count*(11+(s->nb_streams-1)*4) : 0); // indexByteCount
 961     put_be32(pb, indexsid); // indexSID
 962     put_be64(pb, 0); // bodyOffset
 963
 964     put_be32(pb, bodysid); // bodySID
 965     put_buffer(pb, op1a_ul, 16); // operational pattern
 966
 967     // essence container
 968     mxf_write_essence_container_refs(s);
 969
 970     if (write_metadata) {
 971         // mark the start of the headermetadata and calculate metadata size
 972         int64_t pos, start = url_ftell(s->pb);
 973         mxf_write_primer_pack(s);
 974         mxf_write_header_metadata_sets(s);
 975         pos = url_ftell(s->pb);
 976         // update header_byte_count
 977         url_fseek(pb, header_byte_count_offset, SEEK_SET);
 978         put_be64(pb, pos - start);
 979         url_fseek(pb, pos, SEEK_SET);
 980     }
 981
 982     put_flush_packet(pb);
 983 }
 984
 985 static const UID mxf_mpeg2_codec_uls[] = {
 986     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame
 987     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP
 988     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame
 989     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP
 990     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame
 991     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP
 992     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame
 993     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP
 994 };
 995
 996 static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)
 997 {
 998     if (avctx->profile == 4) { // Main
 999         if (avctx->level == 8) // Main
1000             return avctx->gop_size ?
1001                 &mxf_mpeg2_codec_uls[1] :
1002                 &mxf_mpeg2_codec_uls[0];
1003         else if (avctx->level == 4) // High
1004             return avctx->gop_size ?
1005                 &mxf_mpeg2_codec_uls[5] :
1006                 &mxf_mpeg2_codec_uls[4];
1007     } else if (avctx->profile == 0) { // 422
1008         if (avctx->level == 5) // Main
1009             return avctx->gop_size ?
1010                 &mxf_mpeg2_codec_uls[3] :
1011                 &mxf_mpeg2_codec_uls[2];
1012         else if (avctx->level == 2) // High
1013             return avctx->gop_size ?
1014                 &mxf_mpeg2_codec_uls[7] :
1015                 &mxf_mpeg2_codec_uls[6];
1016     }
1017     return NULL;
1018 }
1019
1020 static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)
1021 {
1022     MXFContext *mxf = s->priv_data;
1023     MXFStreamContext *sc = st->priv_data;
1024     uint32_t c = -1;
1025     int i;
1026
1027     mxf->index_entries[mxf->edit_units_count].flags = 0;
1028
1029     for(i = 0; i < pkt->size - 4; i++) {
1030         c = (c<<8) + pkt->data[i];
1031         if (c == 0x1B5) {
1032             if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
1033                 st->codec->profile = pkt->data[i+1] & 0x07;
1034                 st->codec->level   = pkt->data[i+2] >> 4;
1035             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext
1036                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame
1037                 break;
1038             }
1039         } else if (c == 0x1b8) { // gop
1040             if (i + 4 < pkt->size && pkt->data[i+4]>>6 & 0x01) // closed
1041                 mxf->index_entries[mxf->edit_units_count].flags |= 0x80; // random access
1042         } else if (c == 0x1b3) { // seq
1043             mxf->index_entries[mxf->edit_units_count].flags |= 0x40;
1044         } else if (c == 0x100) { // pic
1045             int pict_type = (pkt->data[i+2]>>3) & 0x07;
1046             if (pict_type == 2) { // P frame
1047                 mxf->index_entries[mxf->edit_units_count].flags |= 0x22;
1048                 st->codec->gop_size = 1;
1049             } else if (pict_type == 3) { // B frame
1050                 mxf->index_entries[mxf->edit_units_count].flags |= 0x33;
1051                 sc->temporal_reordering = -1;
1052             } else if (!pict_type) {
1053                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");
1054                 return 0;
1055             }
1056         }
1057     }
1058     sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);
1059     return !!sc->codec_ul;
1060 }
1061
1062 static int ff_audio_interleave_init(AVFormatContext *s, const int *samples_per_frame)
1063 {
1064     int i;
1065
1066     if (!samples_per_frame)
1067         return -1;
1068
1069     for (i = 0; i < s->nb_streams; i++) {
1070         AVStream *st = s->streams[i];
1071         AudioInterleaveContext *aic = st->priv_data;
1072
1073         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1074             aic->sample_size = (st->codec->channels *
1075                                 av_get_bits_per_sample(st->codec->codec_id)) / 8;
1076             if (!aic->sample_size) {
1077                 av_log(s, AV_LOG_ERROR, "could not compute sample size\n");
1078                 return -1;
1079             }
1080             aic->samples_per_frame = samples_per_frame;
1081             aic->samples = aic->samples_per_frame;
1082
1083             av_fifo_init(&aic->fifo, 100 * *aic->samples);
1084         }
1085     }
1086
1087     return 0;
1088 }
1089
1090 static void ff_audio_interleave_close(AVFormatContext *s)
1091 {
1092     int i;
1093     for (i = 0; i < s->nb_streams; i++) {
1094         AVStream *st = s->streams[i];
1095         AudioInterleaveContext *aic = st->priv_data;
1096
1097         if (st->codec->codec_type == CODEC_TYPE_AUDIO)
1098             av_fifo_free(&aic->fifo);
1099     }
1100 }
1101
1102 static int mxf_write_header(AVFormatContext *s)
1103 {
1104     MXFContext *mxf = s->priv_data;
1105     int i;
1106     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};
1107     const int *samples_per_frame = NULL;
1108
1109     if (s->nb_streams > 17) {
1110         av_log(s, AV_LOG_ERROR, "error, mxf muxer supports 17 tracks maximum\n");
1111         return -1;
1112     }
1113
1114     for (i = 0; i < s->nb_streams; i++) {
1115         AVStream *st = s->streams[i];
1116         MXFStreamContext *sc = av_mallocz(sizeof(*sc));
1117         if (!sc)
1118             return AVERROR(ENOMEM);
1119         st->priv_data = sc;
1120
1121         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
1122             if (fabs(av_q2d(st->codec->time_base) - 1/25.0) < 0.0001) {
1123                 samples_per_frame = PAL_samples_per_frame;
1124                 mxf->time_base = (AVRational){ 1, 25 };
1125             } else if (fabs(av_q2d(st->codec->time_base) - 1001/30000.0) < 0.0001) {
1126                 samples_per_frame = NTSC_samples_per_frame;
1127                 mxf->time_base = (AVRational){ 1001, 30000 };
1128             } else {
1129                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");
1130                 return -1;
1131             }
1132             mxf->edit_unit_start = st->index;
1133         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1134             if (st->codec->sample_rate != 48000) {
1135                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");
1136                 return -1;
1137             }
1138         }
1139         sc->duration = -1;
1140
1141         sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);
1142         if (sc->index == -1) {
1143             av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "
1144                    "codec not currently supported in container\n", i);
1145             return -1;
1146         }
1147
1148         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;
1149
1150         if (!present[sc->index]) {
1151             mxf->essence_containers_indices[mxf->essence_container_count++] = sc->index;
1152             present[sc->index] = 1;
1153         } else
1154             present[sc->index]++;
1155         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);
1156         sc->track_essence_element_key[15] = present[sc->index];
1157         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);
1158     }
1159
1160     for (i = 0; i < s->nb_streams; i++) {
1161         MXFStreamContext *sc = s->streams[i]->priv_data;
1162         av_set_pts_info(s->streams[i], 64, mxf->time_base.num, mxf->time_base.den);
1163         // update element count
1164         sc->track_essence_element_key[13] = present[sc->index];
1165         sc->order = AV_RB32(sc->track_essence_element_key+12);
1166     }
1167
1168     if (!samples_per_frame)
1169         samples_per_frame = PAL_samples_per_frame;
1170
1171     if (ff_audio_interleave_init(s, samples_per_frame) < 0)
1172         return -1;
1173
1174     return 0;
1175 }
1176
1177 static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
1178 {
1179     MXFContext *mxf = s->priv_data;
1180     ByteIOContext *pb = s->pb;
1181     AVStream *st = s->streams[pkt->stream_index];
1182     MXFStreamContext *sc = st->priv_data;
1183
1184     if (!(mxf->edit_units_count % MXF_INDEX_CLUSTER_SIZE)) {
1185         mxf->index_entries = av_realloc(mxf->index_entries,
1186             (mxf->edit_units_count + MXF_INDEX_CLUSTER_SIZE)*
1187              sizeof(*mxf->index_entries));
1188         if (!mxf->index_entries) {
1189             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");
1190             return -1;
1191         }
1192     }
1193
1194     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
1195         if (!mxf_parse_mpeg2_frame(s, st, pkt)) {
1196             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
1197             return -1;
1198         }
1199     }
1200
1201     if (!mxf->header_written) {
1202         mxf_write_partition(s, 1, 0, header_open_partition_key, 1);
1203         mxf->header_written = 1;
1204     }
1205
1206     if (st->index == mxf->edit_unit_start) {
1207         mxf->index_entries[mxf->edit_units_count].offset = url_ftell(pb);
1208         mxf->index_entries[mxf->edit_units_count].slice_offset[st->index] = 0;
1209         mxf->edit_units_count++;
1210     } else {
1211         mxf->index_entries[mxf->edit_units_count-1].slice_offset[st->index] =
1212             url_ftell(pb) - mxf->index_entries[mxf->edit_units_count-1].offset;
1213     }
1214
1215     put_buffer(pb, sc->track_essence_element_key, 16); // write key
1216     klv_encode_ber_length(pb, pkt->size); // write length
1217     put_buffer(pb, pkt->data, pkt->size); // write value
1218
1219     sc->duration = FFMAX(pkt->pts + pkt->duration, sc->duration);
1220
1221     put_flush_packet(pb);
1222     return 0;
1223 }
1224
1225 static void mxf_write_random_index_pack(AVFormatContext *s)
1226 {
1227     MXFContext *mxf = s->priv_data;
1228     ByteIOContext *pb = s->pb;
1229     uint64_t pos = url_ftell(pb);
1230
1231     put_buffer(pb, random_index_pack_key, 16);
1232     klv_encode_ber_length(pb, 28);
1233
1234     put_be32(pb, 1); // BodySID of header partition
1235     put_be64(pb, 0); // offset of header partition
1236
1237     put_be32(pb, 0); // BodySID of footer partition
1238     put_be64(pb, mxf->footer_partition_offset);
1239
1240     put_be32(pb, url_ftell(pb) - pos + 4);
1241 }
1242
1243 static int mxf_write_footer(AVFormatContext *s)
1244 {
1245     MXFContext *mxf = s->priv_data;
1246     ByteIOContext *pb = s->pb;
1247
1248     mxf->footer_partition_offset = url_ftell(pb);
1249     mxf_write_partition(s, 0, 2, footer_partition_key, 0);
1250
1251     mxf_write_index_table_segment(s);
1252
1253     mxf_write_random_index_pack(s);
1254
1255     if (!url_is_streamed(s->pb)) {
1256         url_fseek(pb, 0, SEEK_SET);
1257         mxf_write_partition(s, 1, 0, header_closed_partition_key, 1);
1258     }
1259
1260     ff_audio_interleave_close(s);
1261
1262     mxf_free(s);
1263     return 0;
1264 }
1265
1266 static int mxf_interleave_new_audio_packet(AVFormatContext *s, AVPacket *pkt,
1267                                            int stream_index, int flush)
1268 {
1269     AVStream *st = s->streams[stream_index];
1270     AudioInterleaveContext *aic = st->priv_data;
1271
1272     int size = FFMIN(av_fifo_size(&aic->fifo), *aic->samples * aic->sample_size);
1273     if (!size || (!flush && size == av_fifo_size(&aic->fifo)))
1274         return 0;
1275
1276     av_new_packet(pkt, size);
1277     av_fifo_read(&aic->fifo, pkt->data, size);
1278
1279     pkt->dts = pkt->pts = aic->dts;
1280     pkt->duration = av_rescale_q(*aic->samples,
1281                                  (AVRational){ 1, st->codec->sample_rate },
1282                                  st->time_base);
1283     pkt->stream_index = stream_index;
1284     aic->dts += pkt->duration;
1285
1286     aic->samples++;
1287     if (!*aic->samples)
1288         aic->samples = aic->samples_per_frame;
1289
1290     return size;
1291 }
1292
1293 static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1294 {
1295     AVPacketList *pktl;
1296     int stream_count = 0;
1297     int streams[MAX_STREAMS];
1298
1299     memset(streams, 0, sizeof(streams));
1300     pktl = s->packet_buffer;
1301     while (pktl) {
1302         //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);
1303         if (!streams[pktl->pkt.stream_index])
1304             stream_count++;
1305         streams[pktl->pkt.stream_index]++;
1306         pktl = pktl->next;
1307     }
1308
1309     if (stream_count && (s->nb_streams == stream_count || flush)) {
1310         pktl = s->packet_buffer;
1311         if (s->nb_streams != stream_count) {
1312             MXFContext *mxf = s->priv_data;
1313             AVPacketList *first = NULL;
1314             // find first packet in edit unit
1315             while (pktl) {
1316                 AVStream *st = s->streams[pktl->pkt.stream_index];
1317                 if (st->index == mxf->edit_unit_start)
1318                     break;
1319                 else if (!first)
1320                     first = pktl;
1321                 pktl = pktl->next;
1322             }
1323             // purge packet queue
1324             while (pktl) {
1325                 AVPacketList *next = pktl->next;
1326                 av_free_packet(&pktl->pkt);
1327                 av_freep(&pktl);
1328                 pktl = next;
1329             }
1330             if (!first)
1331                 goto out;
1332             pktl = first;
1333         }
1334
1335         *out = pktl->pkt;
1336         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);
1337         s->packet_buffer = pktl->next;
1338         av_freep(&pktl);
1339         return 1;
1340     } else {
1341     out:
1342         av_init_packet(out);
1343         return 0;
1344     }
1345 }
1346
1347 static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
1348 {
1349     AVStream *st  = s->streams[pkt ->stream_index];
1350     AVStream *st2 = s->streams[next->stream_index];
1351     MXFStreamContext *sc  = st ->priv_data;
1352     MXFStreamContext *sc2 = st2->priv_data;
1353
1354     int64_t left  = st2->time_base.num * (int64_t)st ->time_base.den;
1355     int64_t right = st ->time_base.num * (int64_t)st2->time_base.den;
1356
1357     return next->dts * left > pkt->dts * right || // FIXME this can overflow
1358         (next->dts * left == pkt->dts * right && sc->order < sc2->order);
1359 }
1360
1361 static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1362 {
1363     int i;
1364
1365     if (pkt) {
1366         AVStream *st = s->streams[pkt->stream_index];
1367         AudioInterleaveContext *aic = st->priv_data;
1368         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1369             av_fifo_generic_write(&aic->fifo, pkt->data, pkt->size, NULL);
1370         } else {
1371             // rewrite pts and dts to be decoded time line position
1372             pkt->pts = pkt->dts = aic->dts;
1373             aic->dts += pkt->duration;
1374             ff_interleave_add_packet(s, pkt, mxf_compare_timestamps);
1375         }
1376         pkt = NULL;
1377     }
1378
1379     for (i = 0; i < s->nb_streams; i++) {
1380         AVStream *st = s->streams[i];
1381         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1382             AVPacket new_pkt;
1383             while (mxf_interleave_new_audio_packet(s, &new_pkt, i, flush))
1384                 ff_interleave_add_packet(s, &new_pkt, mxf_compare_timestamps);
1385         }
1386     }
1387
1388     return mxf_interleave_get_packet(s, out, pkt, flush);
1389 }
1390
1391 AVOutputFormat mxf_muxer = {
1392     "mxf",
1393     NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1394     NULL,
1395     "mxf",
1396     sizeof(MXFContext),
1397     CODEC_ID_PCM_S16LE,
1398     CODEC_ID_MPEG2VIDEO,
1399     mxf_write_header,
1400     mxf_write_packet,
1401     mxf_write_footer,
1402     AVFMT_NOTIMESTAMPS,
1403     NULL,
1404     mxf_interleave,
1405 };