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