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 "libavutil/fifo.h"
  36 #include "mxf.h"
  37
  38 static const int NTSC_samples_per_frame[] = { 1602, 1601, 1602, 1601, 1602, 0 };
  39 static const int PAL_samples_per_frame[]  = { 1920, 0 };
  40
  41 #define MXF_INDEX_CLUSTER_SIZE 4096
  42
  43 typedef struct {
  44     AVFifoBuffer fifo;
  45     unsigned fifo_size;           ///< current fifo size allocated
  46     uint64_t dts;                 ///< current dts
  47     int sample_size;              ///< size of one sample all channels included
  48     const int *samples_per_frame; ///< must be 0 terminated
  49     const int *samples;           ///< current samples per frame, pointer to samples_per_frame
  50 } AudioInterleaveContext;
  51
  52 typedef struct {
  53     int local_tag;
  54     UID uid;
  55 } MXFLocalTagPair;
  56
  57 typedef struct {
  58     uint8_t flags;
  59     uint64_t offset;
  60     unsigned slice_offset[17]; // one video, 16 audio
  61 } MXFIndexEntry;
  62
  63 typedef struct {
  64     AudioInterleaveContext aic;
  65     UID track_essence_element_key;
  66     int index;            ///< index in mxf_essence_container_uls table
  67     const UID *codec_ul;
  68     int64_t duration;
  69     int order;            ///< interleaving order if dts are equal
  70     int interlaced;       ///< wether picture is interlaced
  71     int temporal_reordering;
  72 } MXFStreamContext;
  73
  74 typedef struct {
  75     UID container_ul;
  76     UID element_ul;
  77     UID codec_ul;
  78     void (*write_desc)();
  79 } MXFContainerEssenceEntry;
  80
  81 static const struct {
  82     enum CodecID id;
  83     int index;
  84 } mxf_essence_mappings[] = {
  85     { CODEC_ID_MPEG2VIDEO, 0 },
  86     { CODEC_ID_PCM_S24LE,  1 },
  87     { CODEC_ID_PCM_S16LE,  1 },
  88     { 0 }
  89 };
  90
  91 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st);
  92 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st);
  93 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st);
  94
  95 static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {
  96     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },
  97       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },
  98       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },
  99       mxf_write_mpegvideo_desc },
 100     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },
 101       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },
 102       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 103       mxf_write_aes3_desc },
 104     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },
 105       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },
 106       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
 107       mxf_write_wav_desc },
 108     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
 109       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
 110       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
 111       NULL },
 112 };
 113
 114 typedef struct MXFContext {
 115     int64_t footer_partition_offset;
 116     int essence_container_count;
 117     uint8_t essence_containers_indices[FF_ARRAY_ELEMS(mxf_essence_container_uls)];
 118     AVRational time_base;
 119     int header_written;
 120     MXFIndexEntry *index_entries;
 121     unsigned edit_units_count;
 122     int edit_unit_start;  ///< index of the stream starting edit unit
 123 } MXFContext;
 124
 125 static const uint8_t uuid_base[]            = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };
 126 static const uint8_t umid_base[]            = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x01,0x0D,0x00,0x13,0x00,0x00,0x00 };
 127
 128 /**
 129  * complete key for operation pattern, partitions, and primer pack
 130  */
 131 static const uint8_t op1a_ul[]              = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x01,0x00 };
 132 static const uint8_t footer_partition_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }; // ClosedComplete
 133 static const uint8_t primer_pack_key[]      = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x05,0x01,0x00 };
 134 static const uint8_t index_table_segment_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 };
 135 static const uint8_t random_index_pack_key[]   = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
 136
 137
 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
 146 static const uint8_t multiple_desc_ul[] = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x0D,0x01,0x03,0x01,0x02,0x7F,0x01,0x00 };
 147
 148 /**
 149  * SMPTE RP210 http://www.smpte-ra.org/mdd/index.html
 150  */
 151 static const MXFLocalTagPair mxf_local_tag_batch[] = {
 152     // preface set
 153     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */
 154     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */
 155     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */
 156     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */
 157     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */
 158     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */
 159     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */
 160     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */
 161     // Identification
 162     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */
 163     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */
 164     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */
 165     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */
 166     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */
 167     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */
 168     // Content Storage
 169     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */
 170     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */
 171     // Essence Container Data
 172     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */
 173     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */
 174     // Package
 175     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */
 176     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */
 177     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */
 178     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */
 179     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */
 180     // Track
 181     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */
 182     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */
 183     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */
 184     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */
 185     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */
 186     // Sequence
 187     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */
 188     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */
 189     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */
 190     // Source Clip
 191     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */
 192     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */
 193     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */
 194     // File Descriptor
 195     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */
 196     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */
 197     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */
 198     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */
 199     // Generic Picture Essence Descriptor
 200     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */
 201     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */
 202     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */
 203     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */
 204     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */
 205     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */
 206     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */
 207     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */
 208     // Generic Sound Essence Descriptor
 209     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */
 210     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */
 211     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */
 212     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */
 213     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */
 214     // Index Table Segment
 215     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */
 216     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */
 217     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */
 218     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */
 219     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */
 220     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */
 221     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */
 222     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */
 223     // MPEG video Descriptor
 224     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */
 225     // Wave Audio Essence Descriptor
 226     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */
 227     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */
 228 };
 229
 230 static void mxf_write_uuid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
 231 {
 232     put_buffer(pb, uuid_base, 12);
 233     put_be16(pb, type);
 234     put_be16(pb, value);
 235 }
 236
 237 static void mxf_write_umid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
 238 {
 239     put_buffer(pb, umid_base, 16);
 240     mxf_write_uuid(pb, type, value);
 241 }
 242
 243 static void mxf_write_refs_count(ByteIOContext *pb, int ref_count)
 244 {
 245     put_be32(pb, ref_count);
 246     put_be32(pb, 16);
 247 }
 248
 249 static int klv_encode_ber_length(ByteIOContext *pb, uint64_t len)
 250 {
 251     // Determine the best BER size
 252     int size;
 253     if (len < 128) {
 254         //short form
 255         put_byte(pb, len);
 256         return 1;
 257     }
 258
 259     size = (av_log2(len) >> 3) + 1;
 260
 261     // long form
 262     put_byte(pb, 0x80 + size);
 263     while(size) {
 264         size --;
 265         put_byte(pb, len >> 8 * size & 0xff);
 266     }
 267     return 0;
 268 }
 269
 270 /*
 271  * Get essence container ul index
 272  */
 273 static int mxf_get_essence_container_ul_index(enum CodecID id)
 274 {
 275     int i;
 276     for (i = 0; mxf_essence_mappings[i].id; i++)
 277         if (mxf_essence_mappings[i].id == id)
 278             return mxf_essence_mappings[i].index;
 279     return -1;
 280 }
 281
 282 static void mxf_write_primer_pack(AVFormatContext *s)
 283 {
 284     ByteIOContext *pb = s->pb;
 285     int local_tag_number, i = 0;
 286
 287     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);
 288
 289     put_buffer(pb, primer_pack_key, 16);
 290     klv_encode_ber_length(pb, local_tag_number * 18 + 8);
 291
 292     put_be32(pb, local_tag_number); // local_tag num
 293     put_be32(pb, 18); // item size, always 18 according to the specs
 294
 295     for (i = 0; i < local_tag_number; i++) {
 296         put_be16(pb, mxf_local_tag_batch[i].local_tag);
 297         put_buffer(pb, mxf_local_tag_batch[i].uid, 16);
 298     }
 299 }
 300
 301 static void mxf_write_local_tag(ByteIOContext *pb, int size, int tag)
 302 {
 303     put_be16(pb, tag);
 304     put_be16(pb, size);
 305 }
 306
 307 static void mxf_write_metadata_key(ByteIOContext *pb, unsigned int value)
 308 {
 309     put_buffer(pb, header_metadata_key, 13);
 310     put_be24(pb, value);
 311 }
 312
 313 static void mxf_free(AVFormatContext *s)
 314 {
 315     int i;
 316
 317     for (i = 0; i < s->nb_streams; i++) {
 318         AVStream *st = s->streams[i];
 319         av_freep(&st->priv_data);
 320     }
 321 }
 322
 323 static const MXFDataDefinitionUL *mxf_get_data_definition_ul(enum CodecType type)
 324 {
 325     const MXFDataDefinitionUL *uls = ff_mxf_data_definition_uls;
 326     while (uls->type != CODEC_TYPE_DATA) {
 327         if (type == uls->type)
 328             break;
 329         uls++;
 330     }
 331     return uls;
 332 }
 333
 334 static void mxf_write_essence_container_refs(AVFormatContext *s)
 335 {
 336     MXFContext *c = s->priv_data;
 337     ByteIOContext *pb = s->pb;
 338     int i;
 339
 340     mxf_write_refs_count(pb, c->essence_container_count);
 341     av_log(s,AV_LOG_DEBUG, "essence container count:%d\n", c->essence_container_count);
 342     for (i = 0; i < c->essence_container_count; i++) {
 343         put_buffer(pb, mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul, 16);
 344         PRINT_KEY(s, "essence container ul:\n", mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul);
 345     }
 346 }
 347
 348 static void mxf_write_preface(AVFormatContext *s)
 349 {
 350     MXFContext *mxf = s->priv_data;
 351     ByteIOContext *pb = s->pb;
 352
 353     mxf_write_metadata_key(pb, 0x012f00);
 354     PRINT_KEY(s, "preface key", pb->buf_ptr - 16);
 355     klv_encode_ber_length(pb, 130 + 16 * mxf->essence_container_count);
 356
 357     // write preface set uid
 358     mxf_write_local_tag(pb, 16, 0x3C0A);
 359     mxf_write_uuid(pb, Preface, 0);
 360     PRINT_KEY(s, "preface uid", pb->buf_ptr - 16);
 361
 362     // write create date as unknown
 363     mxf_write_local_tag(pb, 8, 0x3B02);
 364     put_be64(pb, 0);
 365
 366     // write version
 367     mxf_write_local_tag(pb, 2, 0x3B05);
 368     put_be16(pb, 1);
 369
 370     // write identification_refs
 371     mxf_write_local_tag(pb, 16 + 8, 0x3B06);
 372     mxf_write_refs_count(pb, 1);
 373     mxf_write_uuid(pb, Identification, 0);
 374
 375     // write content_storage_refs
 376     mxf_write_local_tag(pb, 16, 0x3B03);
 377     mxf_write_uuid(pb, ContentStorage, 0);
 378
 379     mxf_write_local_tag(pb, 16, 0x3B09);
 380     put_buffer(pb, op1a_ul, 16);
 381
 382     // write essence_container_refs
 383     mxf_write_local_tag(pb, 8 + 16 * mxf->essence_container_count, 0x3B0A);
 384     mxf_write_essence_container_refs(s);
 385
 386     // write dm_scheme_refs
 387     mxf_write_local_tag(pb, 8, 0x3B0B);
 388     put_be64(pb, 0);
 389 }
 390
 391 /*
 392  * Write a local tag containing an ascii string as utf-16
 393  */
 394 static void mxf_write_local_tag_utf16(ByteIOContext *pb, int tag, const char *value)
 395 {
 396     int i, size = strlen(value);
 397     mxf_write_local_tag(pb, size*2, tag);
 398     for (i = 0; i < size; i++)
 399         put_be16(pb, value[i]);
 400 }
 401
 402 static void mxf_write_identification(AVFormatContext *s)
 403 {
 404     ByteIOContext *pb = s->pb;
 405     const char *company = "FFmpeg";
 406     const char *product = "OP1a Muxer";
 407     const char *version;
 408     int length;
 409
 410     mxf_write_metadata_key(pb, 0x013000);
 411     PRINT_KEY(s, "identification key", pb->buf_ptr - 16);
 412
 413     version = s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT ?
 414         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);
 415     length = 84 + (strlen(company)+strlen(product)+strlen(version))*2; // utf-16
 416     klv_encode_ber_length(pb, length);
 417
 418     // write uid
 419     mxf_write_local_tag(pb, 16, 0x3C0A);
 420     mxf_write_uuid(pb, Identification, 0);
 421     PRINT_KEY(s, "identification uid", pb->buf_ptr - 16);
 422
 423     // write generation uid
 424     mxf_write_local_tag(pb, 16, 0x3C09);
 425     mxf_write_uuid(pb, Identification, 1);
 426
 427     mxf_write_local_tag_utf16(pb, 0x3C01, company); // Company Name
 428     mxf_write_local_tag_utf16(pb, 0x3C02, product); // Product Name
 429     mxf_write_local_tag_utf16(pb, 0x3C04, version); // Version String
 430
 431     // write product uid
 432     mxf_write_local_tag(pb, 16, 0x3C05);
 433     mxf_write_uuid(pb, Identification, 2);
 434
 435     // write modified date
 436     mxf_write_local_tag(pb, 8, 0x3C06);
 437     put_be64(pb, 0);
 438 }
 439
 440 static void mxf_write_content_storage(AVFormatContext *s)
 441 {
 442     ByteIOContext *pb = s->pb;
 443
 444     mxf_write_metadata_key(pb, 0x011800);
 445     PRINT_KEY(s, "content storage key", pb->buf_ptr - 16);
 446     klv_encode_ber_length(pb, 92);
 447
 448     // write uid
 449     mxf_write_local_tag(pb, 16, 0x3C0A);
 450     mxf_write_uuid(pb, ContentStorage, 0);
 451     PRINT_KEY(s, "content storage uid", pb->buf_ptr - 16);
 452
 453     // write package reference
 454     mxf_write_local_tag(pb, 16 * 2 + 8, 0x1901);
 455     mxf_write_refs_count(pb, 2);
 456     mxf_write_uuid(pb, MaterialPackage, 0);
 457     mxf_write_uuid(pb, SourcePackage, 0);
 458
 459     // write essence container data
 460     mxf_write_local_tag(pb, 8 + 16, 0x1902);
 461     mxf_write_refs_count(pb, 1);
 462     mxf_write_uuid(pb, EssenceContainerData, 0);
 463 }
 464
 465 static void mxf_write_track(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 466 {
 467     ByteIOContext *pb = s->pb;
 468     MXFStreamContext *sc = st->priv_data;
 469
 470     mxf_write_metadata_key(pb, 0x013b00);
 471     PRINT_KEY(s, "track key", pb->buf_ptr - 16);
 472     klv_encode_ber_length(pb, 80);
 473
 474     // write track uid
 475     mxf_write_local_tag(pb, 16, 0x3C0A);
 476     mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, st->index);
 477     PRINT_KEY(s, "track uid", pb->buf_ptr - 16);
 478
 479     // write track id
 480     mxf_write_local_tag(pb, 4, 0x4801);
 481     put_be32(pb, st->index);
 482
 483     // write track number
 484     mxf_write_local_tag(pb, 4, 0x4804);
 485     if (type == MaterialPackage)
 486         put_be32(pb, 0); // track number of material package is 0
 487     else
 488         put_buffer(pb, sc->track_essence_element_key + 12, 4);
 489
 490     mxf_write_local_tag(pb, 8, 0x4B01);
 491     put_be32(pb, st->time_base.den);
 492     put_be32(pb, st->time_base.num);
 493
 494     // write origin
 495     mxf_write_local_tag(pb, 8, 0x4B02);
 496     put_be64(pb, 0);
 497
 498     // write sequence refs
 499     mxf_write_local_tag(pb, 16, 0x4803);
 500     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 501 }
 502
 503 static void mxf_write_common_fields(ByteIOContext *pb, AVStream *st)
 504 {
 505     const MXFDataDefinitionUL *data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);
 506     MXFStreamContext *sc = st->priv_data;
 507
 508     // find data define uls
 509     mxf_write_local_tag(pb, 16, 0x0201);
 510     put_buffer(pb, data_def_ul->uid, 16);
 511
 512     // write duration
 513     mxf_write_local_tag(pb, 8, 0x0202);
 514     put_be64(pb, sc->duration);
 515 }
 516
 517 static void mxf_write_sequence(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 518 {
 519     ByteIOContext *pb = s->pb;
 520
 521     mxf_write_metadata_key(pb, 0x010f00);
 522     PRINT_KEY(s, "sequence key", pb->buf_ptr - 16);
 523     klv_encode_ber_length(pb, 80);
 524
 525     mxf_write_local_tag(pb, 16, 0x3C0A);
 526     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 527
 528     PRINT_KEY(s, "sequence uid", pb->buf_ptr - 16);
 529     mxf_write_common_fields(pb, st);
 530
 531     // write structural component
 532     mxf_write_local_tag(pb, 16 + 8, 0x1001);
 533     mxf_write_refs_count(pb, 1);
 534     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
 535 }
 536
 537 static void mxf_write_structural_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 538 {
 539     ByteIOContext *pb = s->pb;
 540     int i;
 541
 542     mxf_write_metadata_key(pb, 0x011100);
 543     PRINT_KEY(s, "sturctural component key", pb->buf_ptr - 16);
 544     klv_encode_ber_length(pb, 108);
 545
 546     // write uid
 547     mxf_write_local_tag(pb, 16, 0x3C0A);
 548     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
 549
 550     PRINT_KEY(s, "structural component uid", pb->buf_ptr - 16);
 551     mxf_write_common_fields(pb, st);
 552
 553     // write start_position
 554     mxf_write_local_tag(pb, 8, 0x1201);
 555     put_be64(pb, 0);
 556
 557     // write source package uid, end of the reference
 558     mxf_write_local_tag(pb, 32, 0x1101);
 559     if (type == SourcePackage) {
 560         for (i = 0; i < 4; i++)
 561             put_be64(pb, 0);
 562     } else
 563         mxf_write_umid(pb, SourcePackage, 0);
 564
 565     // write source track id
 566     mxf_write_local_tag(pb, 4, 0x1102);
 567     if (type == SourcePackage)
 568         put_be32(pb, 0);
 569     else
 570         put_be32(pb, st->index);
 571 }
 572
 573 static void mxf_write_multi_descriptor(AVFormatContext *s)
 574 {
 575     ByteIOContext *pb = s->pb;
 576     int i;
 577
 578     mxf_write_metadata_key(pb, 0x014400);
 579     PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);
 580     klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);
 581
 582     mxf_write_local_tag(pb, 16, 0x3C0A);
 583     mxf_write_uuid(pb, MultipleDescriptor, 0);
 584     PRINT_KEY(s, "multi_desc uid", pb->buf_ptr - 16);
 585
 586     // write sample rate
 587     mxf_write_local_tag(pb, 8, 0x3001);
 588     put_be32(pb, s->streams[0]->time_base.den);
 589     put_be32(pb, s->streams[0]->time_base.num);
 590
 591     // write essence container ul
 592     mxf_write_local_tag(pb, 16, 0x3004);
 593     put_buffer(pb, multiple_desc_ul, 16);
 594
 595     // write sub descriptor refs
 596     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x3F01);
 597     mxf_write_refs_count(pb, s->nb_streams);
 598     for (i = 0; i < s->nb_streams; i++)
 599         mxf_write_uuid(pb, SubDescriptor, i);
 600 }
 601
 602 static void mxf_write_generic_desc(ByteIOContext *pb, AVStream *st, const UID key, unsigned size)
 603 {
 604     MXFStreamContext *sc = st->priv_data;
 605
 606     put_buffer(pb, key, 16);
 607     klv_encode_ber_length(pb, size);
 608
 609     mxf_write_local_tag(pb, 16, 0x3C0A);
 610     mxf_write_uuid(pb, SubDescriptor, st->index);
 611
 612     mxf_write_local_tag(pb, 4, 0x3006);
 613     put_be32(pb, st->index);
 614
 615     mxf_write_local_tag(pb, 8, 0x3001);
 616     put_be32(pb, st->time_base.den);
 617     put_be32(pb, st->time_base.num);
 618
 619     mxf_write_local_tag(pb, 16, 0x3004);
 620     put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
 621 }
 622
 623 static const UID mxf_mpegvideo_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 };
 624 static const UID mxf_wav_descriptor_key       = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 };
 625 static const UID mxf_aes3_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 };
 626
 627 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
 628 {
 629     MXFStreamContext *sc = st->priv_data;
 630     ByteIOContext *pb = s->pb;
 631     int stored_height = (st->codec->height+15)/16*16;
 632     AVRational dar;
 633     int f1, f2;
 634
 635     mxf_write_generic_desc(pb, st, mxf_mpegvideo_descriptor_key, 153+sc->interlaced*4);
 636
 637     mxf_write_local_tag(pb, 4, 0x3203);
 638     put_be32(pb, st->codec->width);
 639
 640     mxf_write_local_tag(pb, 4, 0x3202);
 641     put_be32(pb, stored_height>>sc->interlaced);
 642
 643     mxf_write_local_tag(pb, 4, 0x3209);
 644     put_be32(pb, st->codec->width);
 645
 646     mxf_write_local_tag(pb, 4, 0x3208);
 647     put_be32(pb, st->codec->height>>sc->interlaced);
 648
 649     // bit rate
 650     mxf_write_local_tag(pb, 4, 0x8000);
 651     put_be32(pb, st->codec->bit_rate);
 652
 653     // frame layout
 654     mxf_write_local_tag(pb, 1, 0x320C);
 655     put_byte(pb, sc->interlaced);
 656
 657     // video line map
 658     switch (st->codec->height) {
 659     case  576: f1 = 23; f2 = 336; break;
 660     case  608: f1 =  7; f2 = 320; break;
 661     case  480: f1 = 20; f2 = 283; break;
 662     case  512: f1 =  7; f2 = 270; break;
 663     case  720: f1 = 26; f2 =   0; break; // progressive
 664     case 1080: f1 = 21; f2 = 584; break;
 665     default:   f1 =  0; f2 =   0; break;
 666     }
 667
 668     if (!sc->interlaced) {
 669         f2  = 0;
 670         f1 *= 2;
 671     }
 672
 673     mxf_write_local_tag(pb, 12+sc->interlaced*4, 0x320D);
 674     put_be32(pb, sc->interlaced ? 2 : 1);
 675     put_be32(pb, 4);
 676     put_be32(pb, f1);
 677     if (sc->interlaced)
 678         put_be32(pb, f2);
 679
 680     av_reduce(&dar.num, &dar.den,
 681               st->codec->width*st->codec->sample_aspect_ratio.num,
 682               st->codec->height*st->codec->sample_aspect_ratio.den,
 683               1024*1024);
 684
 685     mxf_write_local_tag(pb, 8, 0x320E);
 686     put_be32(pb, dar.num);
 687     put_be32(pb, dar.den);
 688
 689     mxf_write_local_tag(pb, 16, 0x3201);
 690     put_buffer(pb, *sc->codec_ul, 16);
 691 }
 692
 693 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 694 {
 695     ByteIOContext *pb = s->pb;
 696
 697     mxf_write_generic_desc(pb, st, key, size);
 698
 699     // audio locked
 700     mxf_write_local_tag(pb, 1, 0x3D02);
 701     put_byte(pb, 1);
 702
 703     // write audio sampling rate
 704     mxf_write_local_tag(pb, 8, 0x3D03);
 705     put_be32(pb, st->codec->sample_rate);
 706     put_be32(pb, 1);
 707
 708     mxf_write_local_tag(pb, 4, 0x3D07);
 709     put_be32(pb, st->codec->channels);
 710
 711     mxf_write_local_tag(pb, 4, 0x3D01);
 712     put_be32(pb, av_get_bits_per_sample(st->codec->codec_id));
 713 }
 714
 715 static void mxf_write_wav_common_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 716 {
 717     ByteIOContext *pb = s->pb;
 718
 719     mxf_write_generic_sound_desc(s, st, key, size);
 720
 721     mxf_write_local_tag(pb, 2, 0x3D0A);
 722     put_be16(pb, st->codec->block_align);
 723
 724     // avg bytes per sec
 725     mxf_write_local_tag(pb, 4, 0x3D09);
 726     put_be32(pb, st->codec->block_align*st->codec->sample_rate);
 727 }
 728
 729 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)
 730 {
 731     mxf_write_wav_common_desc(s, st, mxf_wav_descriptor_key, 107);
 732 }
 733
 734 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)
 735 {
 736     mxf_write_wav_common_desc(s, st, mxf_aes3_descriptor_key, 107);
 737 }
 738
 739 static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)
 740 {
 741     ByteIOContext *pb = s->pb;
 742     int i;
 743
 744     if (type == MaterialPackage) {
 745         mxf_write_metadata_key(pb, 0x013600);
 746         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);
 747         klv_encode_ber_length(pb, 92 + 16 * s->nb_streams);
 748     } else {
 749         mxf_write_metadata_key(pb, 0x013700);
 750         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);
 751         klv_encode_ber_length(pb, 112 + 16 * s->nb_streams); // 20 bytes length for descriptor reference
 752     }
 753
 754     // write uid
 755     mxf_write_local_tag(pb, 16, 0x3C0A);
 756     mxf_write_uuid(pb, type, 0);
 757     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);
 758     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);
 759
 760     // write package umid
 761     mxf_write_local_tag(pb, 32, 0x4401);
 762     mxf_write_umid(pb, type, 0);
 763     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);
 764
 765     // write create date
 766     mxf_write_local_tag(pb, 8, 0x4405);
 767     put_be64(pb, 0);
 768
 769     // write modified date
 770     mxf_write_local_tag(pb, 8, 0x4404);
 771     put_be64(pb, 0);
 772
 773     // write track refs
 774     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x4403);
 775     mxf_write_refs_count(pb, s->nb_streams);
 776     for (i = 0; i < s->nb_streams; i++)
 777         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);
 778
 779     // write multiple descriptor reference
 780     if (type == SourcePackage) {
 781         mxf_write_local_tag(pb, 16, 0x4701);
 782         if (s->nb_streams > 1) {
 783             mxf_write_uuid(pb, MultipleDescriptor, 0);
 784             mxf_write_multi_descriptor(s);
 785         } else
 786             mxf_write_uuid(pb, SubDescriptor, 0);
 787     }
 788
 789     for (i = 0; i < s->nb_streams; i++) {
 790         AVStream *st = s->streams[i];
 791         mxf_write_track(s, st, type);
 792         mxf_write_sequence(s, st, type);
 793         mxf_write_structural_component(s, st, type);
 794
 795         if (type == SourcePackage) {
 796             MXFStreamContext *sc = st->priv_data;
 797             mxf_essence_container_uls[sc->index].write_desc(s, st);
 798         }
 799     }
 800 }
 801
 802 static int mxf_write_essence_container_data(AVFormatContext *s)
 803 {
 804     ByteIOContext *pb = s->pb;
 805
 806     mxf_write_metadata_key(pb, 0x012300);
 807     klv_encode_ber_length(pb, 72);
 808
 809     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID
 810     mxf_write_uuid(pb, EssenceContainerData, 0);
 811
 812     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID
 813     mxf_write_umid(pb, SourcePackage, 0);
 814
 815     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID
 816     put_be32(pb, 1);
 817
 818     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID
 819     put_be32(pb, 2);
 820
 821     return 0;
 822 }
 823
 824 static int mxf_write_header_metadata_sets(AVFormatContext *s)
 825 {
 826     mxf_write_preface(s);
 827     mxf_write_identification(s);
 828     mxf_write_content_storage(s);
 829     mxf_write_package(s, MaterialPackage);
 830     mxf_write_package(s, SourcePackage);
 831     mxf_write_essence_container_data(s);
 832     return 0;
 833 }
 834
 835 static int mxf_write_index_table_segment(AVFormatContext *s)
 836 {
 837     MXFContext *mxf = s->priv_data;
 838     ByteIOContext *pb = s->pb;
 839     int i, j, k, ret, key_offset = 0;
 840     int temporal_reordering = 0;
 841
 842     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);
 843
 844     put_buffer(pb, index_table_segment_key, 16);
 845     ret = klv_encode_ber_length(pb, 109 + s->nb_streams*6 +
 846                                 mxf->edit_units_count*(11+(s->nb_streams-1)*4));
 847
 848     // instance id
 849     mxf_write_local_tag(pb, 16, 0x3C0A);
 850     mxf_write_uuid(pb, IndexTableSegment, 0);
 851
 852     // index edit rate
 853     mxf_write_local_tag(pb, 8, 0x3F0B);
 854     put_be32(pb, mxf->time_base.num);
 855     put_be32(pb, mxf->time_base.den);
 856
 857     // index start position
 858     mxf_write_local_tag(pb, 8, 0x3F0C);
 859     put_be64(pb, 0);
 860
 861     // index duration
 862     mxf_write_local_tag(pb, 8, 0x3F0D);
 863     put_be64(pb, mxf->edit_units_count);
 864
 865     // edit unit byte count
 866     mxf_write_local_tag(pb, 4, 0x3F05);
 867     put_be32(pb, 0);
 868
 869     // index sid
 870     mxf_write_local_tag(pb, 4, 0x3F06);
 871     put_be32(pb, 2);
 872
 873     // body sid
 874     mxf_write_local_tag(pb, 4, 0x3F07);
 875     put_be32(pb, 1);
 876
 877     // slice count - 1
 878     mxf_write_local_tag(pb, 1, 0x3F08);
 879     put_byte(pb, s->nb_streams-1);
 880
 881     // delta entry array
 882     mxf_write_local_tag(pb, 8 + s->nb_streams*6, 0x3F09);
 883     put_be32(pb, s->nb_streams); // num of entries
 884     put_be32(pb, 6);             // size of one entry
 885     for (i = 0; i < s->nb_streams; i++) {
 886         AVStream *st = s->streams[i];
 887         MXFStreamContext *sc = st->priv_data;
 888         put_byte(pb, sc->temporal_reordering);
 889         if (sc->temporal_reordering)
 890             temporal_reordering = 1;
 891         put_byte(pb, i);
 892         put_be32(pb, 0); // element delta
 893     }
 894
 895     mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+(s->nb_streams-1)*4), 0x3F0A);
 896     put_be32(pb, mxf->edit_units_count);  // num of entries
 897     put_be32(pb, 11+(s->nb_streams-1)*4); // size of one entry
 898     for (i = 0; i < mxf->edit_units_count; i++) {
 899         if (mxf->index_entries[i].flags & 0x40)
 900             key_offset = 0;
 901         if (temporal_reordering) {
 902             int temporal_offset = 0;
 903             for (j = i+1; j < mxf->edit_units_count; j++) {
 904                 temporal_offset++;
 905                 if (mxf->index_entries[j].flags & 0x10) { // backward prediction
 906                     // next is not b, so is reordered
 907                     if (!(mxf->index_entries[i+1].flags & 0x10)) {
 908                         if ((mxf->index_entries[i].flags & 0x11) == 0) // i frame
 909                             temporal_offset = 0;
 910                         else
 911                             temporal_offset = -temporal_offset;
 912                     }
 913                     break;
 914                 }
 915             }
 916             put_byte(pb, temporal_offset);
 917         } else
 918             put_byte(pb, 0);
 919         put_byte(pb, key_offset);
 920         put_byte(pb, mxf->index_entries[i].flags);
 921         // stream offset
 922         put_be64(pb, mxf->index_entries[i].offset - mxf->index_entries[0].offset);
 923         for (k = 0; k < s->nb_streams; k++) {
 924             if (mxf->index_entries[i].slice_offset[k])
 925                 put_be32(pb, mxf->index_entries[i].slice_offset[k]);
 926         }
 927         key_offset--;
 928     }
 929
 930     return ret;
 931 }
 932
 933 static void mxf_write_partition(AVFormatContext *s, int bodysid, int indexsid,
 934                                 const uint8_t *key, int write_metadata)
 935 {
 936     MXFContext *mxf = s->priv_data;
 937     ByteIOContext *pb = s->pb;
 938     int64_t header_byte_count_offset;
 939
 940     // write klv
 941     put_buffer(pb, key, 16);
 942
 943     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);
 944
 945     // write partition value
 946     put_be16(pb, 1); // majorVersion
 947     put_be16(pb, 2); // minorVersion
 948     put_be32(pb, 1); // kagSize
 949
 950     put_be64(pb, url_ftell(pb) - 25); // thisPartition
 951     put_be64(pb, 0); // previousPartition
 952
 953     put_be64(pb, mxf->footer_partition_offset); // footerPartition
 954
 955     // set offset
 956     header_byte_count_offset = url_ftell(pb);
 957     put_be64(pb, 0); // headerByteCount, update later
 958
 959     // indexTable
 960     put_be64(pb, indexsid ? 19 + 109 + s->nb_streams*6 +
 961              mxf->edit_units_count*(11+(s->nb_streams-1)*4) : 0); // indexByteCount
 962     put_be32(pb, indexsid); // indexSID
 963     put_be64(pb, 0); // bodyOffset
 964
 965     put_be32(pb, bodysid); // bodySID
 966     put_buffer(pb, op1a_ul, 16); // operational pattern
 967
 968     // essence container
 969     mxf_write_essence_container_refs(s);
 970
 971     if (write_metadata) {
 972         // mark the start of the headermetadata and calculate metadata size
 973         int64_t pos, start = url_ftell(s->pb);
 974         mxf_write_primer_pack(s);
 975         mxf_write_header_metadata_sets(s);
 976         pos = url_ftell(s->pb);
 977         // update header_byte_count
 978         url_fseek(pb, header_byte_count_offset, SEEK_SET);
 979         put_be64(pb, pos - start);
 980         url_fseek(pb, pos, SEEK_SET);
 981     }
 982
 983     put_flush_packet(pb);
 984 }
 985
 986 static const UID mxf_mpeg2_codec_uls[] = {
 987     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame
 988     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP
 989     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame
 990     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP
 991     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame
 992     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP
 993     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame
 994     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP
 995 };
 996
 997 static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)
 998 {
 999     if (avctx->profile == 4) { // Main
1000         if (avctx->level == 8) // Main
1001             return avctx->gop_size ?
1002                 &mxf_mpeg2_codec_uls[1] :
1003                 &mxf_mpeg2_codec_uls[0];
1004         else if (avctx->level == 4) // High
1005             return avctx->gop_size ?
1006                 &mxf_mpeg2_codec_uls[5] :
1007                 &mxf_mpeg2_codec_uls[4];
1008     } else if (avctx->profile == 0) { // 422
1009         if (avctx->level == 5) // Main
1010             return avctx->gop_size ?
1011                 &mxf_mpeg2_codec_uls[3] :
1012                 &mxf_mpeg2_codec_uls[2];
1013         else if (avctx->level == 2) // High
1014             return avctx->gop_size ?
1015                 &mxf_mpeg2_codec_uls[7] :
1016                 &mxf_mpeg2_codec_uls[6];
1017     }
1018     return NULL;
1019 }
1020
1021 static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)
1022 {
1023     MXFContext *mxf = s->priv_data;
1024     MXFStreamContext *sc = st->priv_data;
1025     uint32_t c = -1;
1026     int i;
1027
1028     mxf->index_entries[mxf->edit_units_count].flags = 0;
1029
1030     for(i = 0; i < pkt->size - 4; i++) {
1031         c = (c<<8) + pkt->data[i];
1032         if (c == 0x1B5) {
1033             if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
1034                 st->codec->profile = pkt->data[i+1] & 0x07;
1035                 st->codec->level   = pkt->data[i+2] >> 4;
1036             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext
1037                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame
1038                 break;
1039             }
1040         } else if (c == 0x1b8) { // gop
1041             if (i + 4 < pkt->size && pkt->data[i+4]>>6 & 0x01) // closed
1042                 mxf->index_entries[mxf->edit_units_count].flags |= 0x80; // random access
1043         } else if (c == 0x1b3) { // seq
1044             mxf->index_entries[mxf->edit_units_count].flags |= 0x40;
1045         } else if (c == 0x100) { // pic
1046             int pict_type = (pkt->data[i+2]>>3) & 0x07;
1047             if (pict_type == 2) { // P frame
1048                 mxf->index_entries[mxf->edit_units_count].flags |= 0x22;
1049                 st->codec->gop_size = 1;
1050             } else if (pict_type == 3) { // B frame
1051                 mxf->index_entries[mxf->edit_units_count].flags |= 0x33;
1052                 sc->temporal_reordering = -1;
1053             } else if (!pict_type) {
1054                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");
1055                 return 0;
1056             }
1057         }
1058     }
1059     sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);
1060     return !!sc->codec_ul;
1061 }
1062
1063 static int ff_audio_interleave_init(AVFormatContext *s, const int *samples_per_frame)
1064 {
1065     int i;
1066
1067     if (!samples_per_frame)
1068         return -1;
1069
1070     for (i = 0; i < s->nb_streams; i++) {
1071         AVStream *st = s->streams[i];
1072         AudioInterleaveContext *aic = st->priv_data;
1073
1074         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1075             aic->sample_size = (st->codec->channels *
1076                                 av_get_bits_per_sample(st->codec->codec_id)) / 8;
1077             if (!aic->sample_size) {
1078                 av_log(s, AV_LOG_ERROR, "could not compute sample size\n");
1079                 return -1;
1080             }
1081             aic->samples_per_frame = samples_per_frame;
1082             aic->samples = aic->samples_per_frame;
1083
1084             av_fifo_init(&aic->fifo, 100 * *aic->samples);
1085         }
1086     }
1087
1088     return 0;
1089 }
1090
1091 static void ff_audio_interleave_close(AVFormatContext *s)
1092 {
1093     int i;
1094     for (i = 0; i < s->nb_streams; i++) {
1095         AVStream *st = s->streams[i];
1096         AudioInterleaveContext *aic = st->priv_data;
1097
1098         if (st->codec->codec_type == CODEC_TYPE_AUDIO)
1099             av_fifo_free(&aic->fifo);
1100     }
1101 }
1102
1103 static int mxf_write_header(AVFormatContext *s)
1104 {
1105     MXFContext *mxf = s->priv_data;
1106     int i;
1107     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};
1108     const int *samples_per_frame = NULL;
1109
1110     if (s->nb_streams > 17) {
1111         av_log(s, AV_LOG_ERROR, "error, mxf muxer supports 17 tracks maximum\n");
1112         return -1;
1113     }
1114
1115     for (i = 0; i < s->nb_streams; i++) {
1116         AVStream *st = s->streams[i];
1117         MXFStreamContext *sc = av_mallocz(sizeof(*sc));
1118         if (!sc)
1119             return AVERROR(ENOMEM);
1120         st->priv_data = sc;
1121
1122         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
1123             if (!av_cmp_q(st->codec->time_base, (AVRational){ 1, 25 })) {
1124                 samples_per_frame = PAL_samples_per_frame;
1125                 mxf->time_base = (AVRational){ 1, 25 };
1126             } else if (!av_cmp_q(st->codec->time_base, (AVRational){ 1001, 30000 })) {
1127                 samples_per_frame = NTSC_samples_per_frame;
1128                 mxf->time_base = (AVRational){ 1001, 30000 };
1129             } else {
1130                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");
1131                 return -1;
1132             }
1133             mxf->edit_unit_start = st->index;
1134         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1135             if (st->codec->sample_rate != 48000) {
1136                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");
1137                 return -1;
1138             }
1139         }
1140         sc->duration = -1;
1141
1142         sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);
1143         if (sc->index == -1) {
1144             av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "
1145                    "codec not currently supported in container\n", i);
1146             return -1;
1147         }
1148
1149         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;
1150
1151         if (!present[sc->index]) {
1152             mxf->essence_containers_indices[mxf->essence_container_count++] = sc->index;
1153             present[sc->index] = 1;
1154         } else
1155             present[sc->index]++;
1156         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);
1157         sc->track_essence_element_key[15] = present[sc->index];
1158         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);
1159     }
1160
1161     for (i = 0; i < s->nb_streams; i++) {
1162         MXFStreamContext *sc = s->streams[i]->priv_data;
1163         av_set_pts_info(s->streams[i], 64, mxf->time_base.num, mxf->time_base.den);
1164         // update element count
1165         sc->track_essence_element_key[13] = present[sc->index];
1166         sc->order = AV_RB32(sc->track_essence_element_key+12);
1167     }
1168
1169     if (!samples_per_frame)
1170         samples_per_frame = PAL_samples_per_frame;
1171
1172     if (ff_audio_interleave_init(s, samples_per_frame) < 0)
1173         return -1;
1174
1175     return 0;
1176 }
1177
1178 static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
1179 {
1180     MXFContext *mxf = s->priv_data;
1181     ByteIOContext *pb = s->pb;
1182     AVStream *st = s->streams[pkt->stream_index];
1183     MXFStreamContext *sc = st->priv_data;
1184
1185     if (!(mxf->edit_units_count % MXF_INDEX_CLUSTER_SIZE)) {
1186         mxf->index_entries = av_realloc(mxf->index_entries,
1187             (mxf->edit_units_count + MXF_INDEX_CLUSTER_SIZE)*
1188              sizeof(*mxf->index_entries));
1189         if (!mxf->index_entries) {
1190             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");
1191             return -1;
1192         }
1193     }
1194
1195     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
1196         if (!mxf_parse_mpeg2_frame(s, st, pkt)) {
1197             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
1198             return -1;
1199         }
1200     }
1201
1202     if (!mxf->header_written) {
1203         mxf_write_partition(s, 1, 0, header_open_partition_key, 1);
1204         mxf->header_written = 1;
1205     }
1206
1207     if (st->index == mxf->edit_unit_start) {
1208         mxf->index_entries[mxf->edit_units_count].offset = url_ftell(pb);
1209         mxf->index_entries[mxf->edit_units_count].slice_offset[st->index] = 0;
1210         mxf->edit_units_count++;
1211     } else {
1212         mxf->index_entries[mxf->edit_units_count-1].slice_offset[st->index] =
1213             url_ftell(pb) - mxf->index_entries[mxf->edit_units_count-1].offset;
1214     }
1215
1216     put_buffer(pb, sc->track_essence_element_key, 16); // write key
1217     klv_encode_ber_length(pb, pkt->size); // write length
1218     put_buffer(pb, pkt->data, pkt->size); // write value
1219
1220     sc->duration = FFMAX(pkt->pts + pkt->duration, sc->duration);
1221
1222     put_flush_packet(pb);
1223     return 0;
1224 }
1225
1226 static void mxf_write_random_index_pack(AVFormatContext *s)
1227 {
1228     MXFContext *mxf = s->priv_data;
1229     ByteIOContext *pb = s->pb;
1230     uint64_t pos = url_ftell(pb);
1231
1232     put_buffer(pb, random_index_pack_key, 16);
1233     klv_encode_ber_length(pb, 28);
1234
1235     put_be32(pb, 1); // BodySID of header partition
1236     put_be64(pb, 0); // offset of header partition
1237
1238     put_be32(pb, 0); // BodySID of footer partition
1239     put_be64(pb, mxf->footer_partition_offset);
1240
1241     put_be32(pb, url_ftell(pb) - pos + 4);
1242 }
1243
1244 static int mxf_write_footer(AVFormatContext *s)
1245 {
1246     MXFContext *mxf = s->priv_data;
1247     ByteIOContext *pb = s->pb;
1248
1249     mxf->footer_partition_offset = url_ftell(pb);
1250     mxf_write_partition(s, 0, 2, footer_partition_key, 0);
1251
1252     mxf_write_index_table_segment(s);
1253
1254     mxf_write_random_index_pack(s);
1255
1256     if (!url_is_streamed(s->pb)) {
1257         url_fseek(pb, 0, SEEK_SET);
1258         mxf_write_partition(s, 1, 0, header_closed_partition_key, 1);
1259     }
1260
1261     ff_audio_interleave_close(s);
1262
1263     mxf_free(s);
1264     return 0;
1265 }
1266
1267 static int mxf_interleave_new_audio_packet(AVFormatContext *s, AVPacket *pkt,
1268                                            int stream_index, int flush)
1269 {
1270     AVStream *st = s->streams[stream_index];
1271     AudioInterleaveContext *aic = st->priv_data;
1272
1273     int size = FFMIN(av_fifo_size(&aic->fifo), *aic->samples * aic->sample_size);
1274     if (!size || (!flush && size == av_fifo_size(&aic->fifo)))
1275         return 0;
1276
1277     av_new_packet(pkt, size);
1278     av_fifo_read(&aic->fifo, pkt->data, size);
1279
1280     pkt->dts = pkt->pts = aic->dts;
1281     pkt->duration = av_rescale_q(*aic->samples,
1282                                  (AVRational){ 1, st->codec->sample_rate },
1283                                  st->time_base);
1284     pkt->stream_index = stream_index;
1285     aic->dts += pkt->duration;
1286
1287     aic->samples++;
1288     if (!*aic->samples)
1289         aic->samples = aic->samples_per_frame;
1290
1291     return size;
1292 }
1293
1294 static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1295 {
1296     AVPacketList *pktl;
1297     int stream_count = 0;
1298     int streams[MAX_STREAMS];
1299
1300     memset(streams, 0, sizeof(streams));
1301     pktl = s->packet_buffer;
1302     while (pktl) {
1303         //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);
1304         if (!streams[pktl->pkt.stream_index])
1305             stream_count++;
1306         streams[pktl->pkt.stream_index]++;
1307         pktl = pktl->next;
1308     }
1309
1310     if (stream_count && (s->nb_streams == stream_count || flush)) {
1311         pktl = s->packet_buffer;
1312         if (s->nb_streams != stream_count) {
1313             MXFContext *mxf = s->priv_data;
1314             AVPacketList *first = NULL;
1315             // find first packet in edit unit
1316             while (pktl) {
1317                 AVStream *st = s->streams[pktl->pkt.stream_index];
1318                 if (st->index == mxf->edit_unit_start)
1319                     break;
1320                 else if (!first)
1321                     first = pktl;
1322                 pktl = pktl->next;
1323             }
1324             // purge packet queue
1325             while (pktl) {
1326                 AVPacketList *next = pktl->next;
1327                 av_free_packet(&pktl->pkt);
1328                 av_freep(&pktl);
1329                 pktl = next;
1330             }
1331             if (!first)
1332                 goto out;
1333             pktl = first;
1334         }
1335
1336         *out = pktl->pkt;
1337         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);
1338         s->packet_buffer = pktl->next;
1339         av_freep(&pktl);
1340         return 1;
1341     } else {
1342     out:
1343         av_init_packet(out);
1344         return 0;
1345     }
1346 }
1347
1348 static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
1349 {
1350     AVStream *st  = s->streams[pkt ->stream_index];
1351     AVStream *st2 = s->streams[next->stream_index];
1352     MXFStreamContext *sc  = st ->priv_data;
1353     MXFStreamContext *sc2 = st2->priv_data;
1354
1355     int64_t left  = st2->time_base.num * (int64_t)st ->time_base.den;
1356     int64_t right = st ->time_base.num * (int64_t)st2->time_base.den;
1357
1358     return next->dts * left > pkt->dts * right || // FIXME this can overflow
1359         (next->dts * left == pkt->dts * right && sc->order < sc2->order);
1360 }
1361
1362 static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1363 {
1364     int i;
1365
1366     if (pkt) {
1367         AVStream *st = s->streams[pkt->stream_index];
1368         AudioInterleaveContext *aic = st->priv_data;
1369         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1370             av_fifo_generic_write(&aic->fifo, pkt->data, pkt->size, NULL);
1371         } else {
1372             // rewrite pts and dts to be decoded time line position
1373             pkt->pts = pkt->dts = aic->dts;
1374             aic->dts += pkt->duration;
1375             ff_interleave_add_packet(s, pkt, mxf_compare_timestamps);
1376         }
1377         pkt = NULL;
1378     }
1379
1380     for (i = 0; i < s->nb_streams; i++) {
1381         AVStream *st = s->streams[i];
1382         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1383             AVPacket new_pkt;
1384             while (mxf_interleave_new_audio_packet(s, &new_pkt, i, flush))
1385                 ff_interleave_add_packet(s, &new_pkt, mxf_compare_timestamps);
1386         }
1387     }
1388
1389     return mxf_interleave_get_packet(s, out, pkt, flush);
1390 }
1391
1392 AVOutputFormat mxf_muxer = {
1393     "mxf",
1394     NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1395     NULL,
1396     "mxf",
1397     sizeof(MXFContext),
1398     CODEC_ID_PCM_S16LE,
1399     CODEC_ID_MPEG2VIDEO,
1400     mxf_write_header,
1401     mxf_write_packet,
1402     mxf_write_footer,
1403     0,
1404     NULL,
1405     mxf_interleave,
1406 };