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 typedef struct {
  42     AVFifoBuffer fifo;
  43     unsigned fifo_size;           ///< current fifo size allocated
  44     uint64_t dts;                 ///< current dts
  45     int sample_size;              ///< size of one sample all channels included
  46     const int *samples_per_frame; ///< must be 0 terminated
  47     const int *samples;           ///< current samples per frame, pointer to samples_per_frame
  48 } AudioInterleaveContext;
  49
  50 typedef struct {
  51     int local_tag;
  52     UID uid;
  53 } MXFLocalTagPair;
  54
  55 typedef struct {
  56     AudioInterleaveContext aic;
  57     UID track_essence_element_key;
  58     int index;            ///< index in mxf_essence_container_uls table
  59     const UID *codec_ul;
  60     int64_t duration;
  61     int order;            ///< interleaving order if dts are equal
  62     int interlaced;       ///< wether picture is interlaced
  63 } MXFStreamContext;
  64
  65 typedef struct {
  66     UID container_ul;
  67     UID element_ul;
  68     UID codec_ul;
  69     enum CodecID id;
  70     void (*write_desc)();
  71 } MXFContainerEssenceEntry;
  72
  73 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st);
  74 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st);
  75 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st);
  76
  77 static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {
  78     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },
  79       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },
  80       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },
  81       CODEC_ID_MPEG2VIDEO, mxf_write_mpegvideo_desc },
  82     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },
  83       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },
  84       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
  85       CODEC_ID_PCM_S16LE, mxf_write_aes3_desc },
  86     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },
  87       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },
  88       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
  89       CODEC_ID_PCM_S16LE, mxf_write_wav_desc },
  90     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
  91       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
  92       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
  93       CODEC_ID_NONE, NULL },
  94 };
  95
  96 typedef struct MXFContext {
  97     int64_t footer_partition_offset;
  98     int essence_container_count;
  99     uint8_t essence_containers_indices[FF_ARRAY_ELEMS(mxf_essence_container_uls)];
 100     AVRational time_base;
 101     int header_written;
 102 } MXFContext;
 103
 104 static const uint8_t uuid_base[]            = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };
 105 static const uint8_t umid_base[]            = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x01,0x0D,0x00,0x13,0x00,0x00,0x00 };
 106
 107 /**
 108  * complete key for operation pattern, partitions, and primer pack
 109  */
 110 static const uint8_t op1a_ul[]              = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x01,0x00 };
 111 static const uint8_t footer_partition_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }; // ClosedComplete
 112 static const uint8_t primer_pack_key[]      = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x05,0x01,0x00 };
 113
 114
 115 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
 116 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
 117
 118 /**
 119  * partial key for header metadata
 120  */
 121 static const uint8_t header_metadata_key[]  = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01 };
 122
 123 static const uint8_t multiple_desc_ul[] = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x0D,0x01,0x03,0x01,0x02,0x7F,0x01,0x00 };
 124
 125 /**
 126  * SMPTE RP210 http://www.smpte-ra.org/mdd/index.html
 127  */
 128 static const MXFLocalTagPair mxf_local_tag_batch[] = {
 129     // preface set
 130     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */
 131     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */
 132     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */
 133     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */
 134     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */
 135     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */
 136     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */
 137     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */
 138     // Identification
 139     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */
 140     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */
 141     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */
 142     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */
 143     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */
 144     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */
 145     // Content Storage
 146     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */
 147     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */
 148     // Essence Container Data
 149     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */
 150     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */
 151     // Package
 152     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */
 153     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */
 154     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */
 155     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */
 156     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */
 157     // Track
 158     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */
 159     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */
 160     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */
 161     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */
 162     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */
 163     // Sequence
 164     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */
 165     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */
 166     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */
 167     // Source Clip
 168     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */
 169     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */
 170     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */
 171     // File Descriptor
 172     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */
 173     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */
 174     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */
 175     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */
 176     // Generic Picture Essence Descriptor
 177     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */
 178     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */
 179     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */
 180     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */
 181     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */
 182     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */
 183     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */
 184     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */
 185     // Generic Sound Essence Descriptor
 186     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */
 187     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */
 188     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */
 189     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */
 190     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */
 191 };
 192
 193 static void mxf_write_uuid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
 194 {
 195     put_buffer(pb, uuid_base, 12);
 196     put_be16(pb, type);
 197     put_be16(pb, value);
 198 }
 199
 200 static void mxf_write_umid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
 201 {
 202     put_buffer(pb, umid_base, 16);
 203     mxf_write_uuid(pb, type, value);
 204 }
 205
 206 static void mxf_write_refs_count(ByteIOContext *pb, int ref_count)
 207 {
 208     put_be32(pb, ref_count);
 209     put_be32(pb, 16);
 210 }
 211
 212 static int klv_encode_ber_length(ByteIOContext *pb, uint64_t len)
 213 {
 214     // Determine the best BER size
 215     int size;
 216     if (len < 128) {
 217         //short form
 218         put_byte(pb, len);
 219         return 1;
 220     }
 221
 222     size = (av_log2(len) >> 3) + 1;
 223
 224     // long form
 225     put_byte(pb, 0x80 + size);
 226     while(size) {
 227         size --;
 228         put_byte(pb, len >> 8 * size & 0xff);
 229     }
 230     return 0;
 231 }
 232
 233 /*
 234  * Get essence container ul index
 235  */
 236 static int mxf_get_essence_container_ul_index(enum CodecID id)
 237 {
 238     int i;
 239     for (i = 0; i < FF_ARRAY_ELEMS(mxf_essence_container_uls); i++)
 240         if (mxf_essence_container_uls[i].id == id)
 241             return i;
 242     return -1;
 243 }
 244
 245 static void mxf_write_primer_pack(AVFormatContext *s)
 246 {
 247     ByteIOContext *pb = s->pb;
 248     int local_tag_number, i = 0;
 249
 250     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);
 251
 252     put_buffer(pb, primer_pack_key, 16);
 253     klv_encode_ber_length(pb, local_tag_number * 18 + 8);
 254
 255     put_be32(pb, local_tag_number); // local_tag num
 256     put_be32(pb, 18); // item size, always 18 according to the specs
 257
 258     for (i = 0; i < local_tag_number; i++) {
 259         put_be16(pb, mxf_local_tag_batch[i].local_tag);
 260         put_buffer(pb, mxf_local_tag_batch[i].uid, 16);
 261     }
 262 }
 263
 264 static void mxf_write_local_tag(ByteIOContext *pb, int size, int tag)
 265 {
 266     put_be16(pb, tag);
 267     put_be16(pb, size);
 268 }
 269
 270 static void mxf_write_metadata_key(ByteIOContext *pb, unsigned int value)
 271 {
 272     put_buffer(pb, header_metadata_key, 13);
 273     put_be24(pb, value);
 274 }
 275
 276 static void mxf_free(AVFormatContext *s)
 277 {
 278     int i;
 279
 280     for (i = 0; i < s->nb_streams; i++) {
 281         AVStream *st = s->streams[i];
 282         av_freep(&st->priv_data);
 283     }
 284 }
 285
 286 static const MXFDataDefinitionUL *mxf_get_data_definition_ul(enum CodecType type)
 287 {
 288     const MXFDataDefinitionUL *uls = ff_mxf_data_definition_uls;
 289     while (uls->type != CODEC_TYPE_DATA) {
 290         if (type == uls->type)
 291             break;
 292         uls++;
 293     }
 294     return uls;
 295 }
 296
 297 static void mxf_write_essence_container_refs(AVFormatContext *s)
 298 {
 299     MXFContext *c = s->priv_data;
 300     ByteIOContext *pb = s->pb;
 301     int i;
 302
 303     mxf_write_refs_count(pb, c->essence_container_count);
 304     av_log(s,AV_LOG_DEBUG, "essence container count:%d\n", c->essence_container_count);
 305     for (i = 0; i < c->essence_container_count; i++) {
 306         put_buffer(pb, mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul, 16);
 307         PRINT_KEY(s, "essence container ul:\n", mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul);
 308     }
 309 }
 310
 311 static void mxf_write_preface(AVFormatContext *s)
 312 {
 313     MXFContext *mxf = s->priv_data;
 314     ByteIOContext *pb = s->pb;
 315
 316     mxf_write_metadata_key(pb, 0x012f00);
 317     PRINT_KEY(s, "preface key", pb->buf_ptr - 16);
 318     klv_encode_ber_length(pb, 130 + 16 * mxf->essence_container_count);
 319
 320     // write preface set uid
 321     mxf_write_local_tag(pb, 16, 0x3C0A);
 322     mxf_write_uuid(pb, Preface, 0);
 323     PRINT_KEY(s, "preface uid", pb->buf_ptr - 16);
 324
 325     // write create date as unknown
 326     mxf_write_local_tag(pb, 8, 0x3B02);
 327     put_be64(pb, 0);
 328
 329     // write version
 330     mxf_write_local_tag(pb, 2, 0x3B05);
 331     put_be16(pb, 1);
 332
 333     // write identification_refs
 334     mxf_write_local_tag(pb, 16 + 8, 0x3B06);
 335     mxf_write_refs_count(pb, 1);
 336     mxf_write_uuid(pb, Identification, 0);
 337
 338     // write content_storage_refs
 339     mxf_write_local_tag(pb, 16, 0x3B03);
 340     mxf_write_uuid(pb, ContentStorage, 0);
 341
 342     mxf_write_local_tag(pb, 16, 0x3B09);
 343     put_buffer(pb, op1a_ul, 16);
 344
 345     // write essence_container_refs
 346     mxf_write_local_tag(pb, 8 + 16 * mxf->essence_container_count, 0x3B0A);
 347     mxf_write_essence_container_refs(s);
 348
 349     // write dm_scheme_refs
 350     mxf_write_local_tag(pb, 8, 0x3B0B);
 351     put_be64(pb, 0);
 352 }
 353
 354 /*
 355  * Write a local tag containing an ascii string as utf-16
 356  */
 357 static void mxf_write_local_tag_utf16(ByteIOContext *pb, int tag, const char *value)
 358 {
 359     int i, size = strlen(value);
 360     mxf_write_local_tag(pb, size*2, tag);
 361     for (i = 0; i < size; i++)
 362         put_be16(pb, value[i]);
 363 }
 364
 365 static void mxf_write_identification(AVFormatContext *s)
 366 {
 367     ByteIOContext *pb = s->pb;
 368     const char *company = "FFmpeg";
 369     const char *product = "OP1a Muxer";
 370     const char *version;
 371     int length;
 372
 373     mxf_write_metadata_key(pb, 0x013000);
 374     PRINT_KEY(s, "identification key", pb->buf_ptr - 16);
 375
 376     version = s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT ?
 377         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);
 378     length = 84 + (strlen(company)+strlen(product)+strlen(version))*2; // utf-16
 379     klv_encode_ber_length(pb, length);
 380
 381     // write uid
 382     mxf_write_local_tag(pb, 16, 0x3C0A);
 383     mxf_write_uuid(pb, Identification, 0);
 384     PRINT_KEY(s, "identification uid", pb->buf_ptr - 16);
 385
 386     // write generation uid
 387     mxf_write_local_tag(pb, 16, 0x3C09);
 388     mxf_write_uuid(pb, Identification, 1);
 389
 390     mxf_write_local_tag_utf16(pb, 0x3C01, company); // Company Name
 391     mxf_write_local_tag_utf16(pb, 0x3C02, product); // Product Name
 392     mxf_write_local_tag_utf16(pb, 0x3C04, version); // Version String
 393
 394     // write product uid
 395     mxf_write_local_tag(pb, 16, 0x3C05);
 396     mxf_write_uuid(pb, Identification, 2);
 397
 398     // write modified date
 399     mxf_write_local_tag(pb, 8, 0x3C06);
 400     put_be64(pb, 0);
 401 }
 402
 403 static void mxf_write_content_storage(AVFormatContext *s)
 404 {
 405     ByteIOContext *pb = s->pb;
 406
 407     mxf_write_metadata_key(pb, 0x011800);
 408     PRINT_KEY(s, "content storage key", pb->buf_ptr - 16);
 409     klv_encode_ber_length(pb, 92);
 410
 411     // write uid
 412     mxf_write_local_tag(pb, 16, 0x3C0A);
 413     mxf_write_uuid(pb, ContentStorage, 0);
 414     PRINT_KEY(s, "content storage uid", pb->buf_ptr - 16);
 415
 416     // write package reference
 417     mxf_write_local_tag(pb, 16 * 2 + 8, 0x1901);
 418     mxf_write_refs_count(pb, 2);
 419     mxf_write_uuid(pb, MaterialPackage, 0);
 420     mxf_write_uuid(pb, SourcePackage, 0);
 421
 422     // write essence container data
 423     mxf_write_local_tag(pb, 8 + 16, 0x1902);
 424     mxf_write_refs_count(pb, 1);
 425     mxf_write_uuid(pb, EssenceContainerData, 0);
 426 }
 427
 428 static void mxf_write_track(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 429 {
 430     ByteIOContext *pb = s->pb;
 431     MXFStreamContext *sc = st->priv_data;
 432
 433     mxf_write_metadata_key(pb, 0x013b00);
 434     PRINT_KEY(s, "track key", pb->buf_ptr - 16);
 435     klv_encode_ber_length(pb, 80);
 436
 437     // write track uid
 438     mxf_write_local_tag(pb, 16, 0x3C0A);
 439     mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, st->index);
 440     PRINT_KEY(s, "track uid", pb->buf_ptr - 16);
 441
 442     // write track id
 443     mxf_write_local_tag(pb, 4, 0x4801);
 444     put_be32(pb, st->index);
 445
 446     // write track number
 447     mxf_write_local_tag(pb, 4, 0x4804);
 448     if (type == MaterialPackage)
 449         put_be32(pb, 0); // track number of material package is 0
 450     else
 451         put_buffer(pb, sc->track_essence_element_key + 12, 4);
 452
 453     mxf_write_local_tag(pb, 8, 0x4B01);
 454     put_be32(pb, st->time_base.den);
 455     put_be32(pb, st->time_base.num);
 456
 457     // write origin
 458     mxf_write_local_tag(pb, 8, 0x4B02);
 459     put_be64(pb, 0);
 460
 461     // write sequence refs
 462     mxf_write_local_tag(pb, 16, 0x4803);
 463     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 464 }
 465
 466 static void mxf_write_common_fields(ByteIOContext *pb, AVStream *st)
 467 {
 468     const MXFDataDefinitionUL *data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);
 469     MXFStreamContext *sc = st->priv_data;
 470
 471     // find data define uls
 472     mxf_write_local_tag(pb, 16, 0x0201);
 473     put_buffer(pb, data_def_ul->uid, 16);
 474
 475     // write duration
 476     mxf_write_local_tag(pb, 8, 0x0202);
 477     put_be64(pb, sc->duration);
 478 }
 479
 480 static void mxf_write_sequence(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 481 {
 482     ByteIOContext *pb = s->pb;
 483
 484     mxf_write_metadata_key(pb, 0x010f00);
 485     PRINT_KEY(s, "sequence key", pb->buf_ptr - 16);
 486     klv_encode_ber_length(pb, 80);
 487
 488     mxf_write_local_tag(pb, 16, 0x3C0A);
 489     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 490
 491     PRINT_KEY(s, "sequence uid", pb->buf_ptr - 16);
 492     mxf_write_common_fields(pb, st);
 493
 494     // write structural component
 495     mxf_write_local_tag(pb, 16 + 8, 0x1001);
 496     mxf_write_refs_count(pb, 1);
 497     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
 498 }
 499
 500 static void mxf_write_structural_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 501 {
 502     ByteIOContext *pb = s->pb;
 503     int i;
 504
 505     mxf_write_metadata_key(pb, 0x011100);
 506     PRINT_KEY(s, "sturctural component key", pb->buf_ptr - 16);
 507     klv_encode_ber_length(pb, 108);
 508
 509     // write uid
 510     mxf_write_local_tag(pb, 16, 0x3C0A);
 511     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
 512
 513     PRINT_KEY(s, "structural component uid", pb->buf_ptr - 16);
 514     mxf_write_common_fields(pb, st);
 515
 516     // write start_position
 517     mxf_write_local_tag(pb, 8, 0x1201);
 518     put_be64(pb, 0);
 519
 520     // write source package uid, end of the reference
 521     mxf_write_local_tag(pb, 32, 0x1101);
 522     if (type == SourcePackage) {
 523         for (i = 0; i < 4; i++)
 524             put_be64(pb, 0);
 525     } else
 526         mxf_write_umid(pb, SourcePackage, 0);
 527
 528     // write source track id
 529     mxf_write_local_tag(pb, 4, 0x1102);
 530     if (type == SourcePackage)
 531         put_be32(pb, 0);
 532     else
 533         put_be32(pb, st->index);
 534 }
 535
 536 static void mxf_write_multi_descriptor(AVFormatContext *s)
 537 {
 538     ByteIOContext *pb = s->pb;
 539     int i;
 540
 541     mxf_write_metadata_key(pb, 0x014400);
 542     PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);
 543     klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);
 544
 545     mxf_write_local_tag(pb, 16, 0x3C0A);
 546     mxf_write_uuid(pb, MultipleDescriptor, 0);
 547     PRINT_KEY(s, "multi_desc uid", pb->buf_ptr - 16);
 548
 549     // write sample rate
 550     mxf_write_local_tag(pb, 8, 0x3001);
 551     put_be32(pb, s->streams[0]->time_base.den);
 552     put_be32(pb, s->streams[0]->time_base.num);
 553
 554     // write essence container ul
 555     mxf_write_local_tag(pb, 16, 0x3004);
 556     put_buffer(pb, multiple_desc_ul, 16);
 557
 558     // write sub descriptor refs
 559     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x3F01);
 560     mxf_write_refs_count(pb, s->nb_streams);
 561     for (i = 0; i < s->nb_streams; i++)
 562         mxf_write_uuid(pb, SubDescriptor, i);
 563 }
 564
 565 static void mxf_write_generic_desc(ByteIOContext *pb, AVStream *st, const UID key, unsigned size)
 566 {
 567     MXFStreamContext *sc = st->priv_data;
 568
 569     put_buffer(pb, key, 16);
 570     klv_encode_ber_length(pb, size);
 571
 572     mxf_write_local_tag(pb, 16, 0x3C0A);
 573     mxf_write_uuid(pb, SubDescriptor, st->index);
 574
 575     mxf_write_local_tag(pb, 4, 0x3006);
 576     put_be32(pb, st->index);
 577
 578     mxf_write_local_tag(pb, 8, 0x3001);
 579     put_be32(pb, st->time_base.den);
 580     put_be32(pb, st->time_base.num);
 581
 582     mxf_write_local_tag(pb, 16, 0x3004);
 583     put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
 584 }
 585
 586 static const UID mxf_mpegvideo_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 };
 587 static const UID mxf_wav_descriptor_key       = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 };
 588 static const UID mxf_aes3_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 };
 589
 590 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
 591 {
 592     MXFStreamContext *sc = st->priv_data;
 593     ByteIOContext *pb = s->pb;
 594     int stored_height = (st->codec->height+15)/16*16;
 595     AVRational dar;
 596     int f1, f2;
 597
 598     mxf_write_generic_desc(pb, st, mxf_mpegvideo_descriptor_key, 149);
 599
 600     mxf_write_local_tag(pb, 4, 0x3203);
 601     put_be32(pb, st->codec->width);
 602
 603     mxf_write_local_tag(pb, 4, 0x3202);
 604     put_be32(pb, stored_height>>sc->interlaced);
 605
 606     mxf_write_local_tag(pb, 4, 0x3209);
 607     put_be32(pb, st->codec->width);
 608
 609     mxf_write_local_tag(pb, 4, 0x3208);
 610     put_be32(pb, st->codec->height>>sc->interlaced);
 611
 612     // frame layout
 613     mxf_write_local_tag(pb, 1, 0x320C);
 614     put_byte(pb, sc->interlaced);
 615
 616     // video line map
 617     mxf_write_local_tag(pb, 16, 0x320D);
 618     put_be32(pb, 2);
 619     put_be32(pb, 4);
 620     switch (st->codec->height) {
 621     case  576: f1 = 23; f2 = 336; break;
 622     case  608: f1 =  7; f2 = 320; break;
 623     case  480: f1 = 20; f2 = 283; break;
 624     case  512: f1 =  7; f2 = 270; break;
 625     case  720: f1 = 26; f2 =   0; break; // progressive
 626     case 1080: f1 = 21; f2 = 584; break;
 627     default:   f1 =  0; f2 =   0; break;
 628     }
 629
 630     if (!sc->interlaced) {
 631         f2  = 0;
 632         f1 *= 2;
 633     }
 634
 635     put_be32(pb, f1);
 636     put_be32(pb, f2);
 637
 638     av_reduce(&dar.num, &dar.den,
 639               st->codec->width*st->codec->sample_aspect_ratio.num,
 640               st->codec->height*st->codec->sample_aspect_ratio.den,
 641               1024*1024);
 642
 643     mxf_write_local_tag(pb, 8, 0x320E);
 644     put_be32(pb, dar.num);
 645     put_be32(pb, dar.den);
 646
 647     mxf_write_local_tag(pb, 16, 0x3201);
 648     put_buffer(pb, *sc->codec_ul, 16);
 649 }
 650
 651 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 652 {
 653     ByteIOContext *pb = s->pb;
 654
 655     mxf_write_generic_desc(pb, st, key, size);
 656
 657     // audio locked
 658     mxf_write_local_tag(pb, 1, 0x3D02);
 659     put_byte(pb, 1);
 660
 661     // write audio sampling rate
 662     mxf_write_local_tag(pb, 8, 0x3D03);
 663     put_be32(pb, st->codec->sample_rate);
 664     put_be32(pb, 1);
 665
 666     mxf_write_local_tag(pb, 4, 0x3D07);
 667     put_be32(pb, st->codec->channels);
 668
 669     mxf_write_local_tag(pb, 4, 0x3D01);
 670     put_be32(pb, st->codec->bits_per_coded_sample);
 671 }
 672
 673 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)
 674 {
 675     mxf_write_generic_sound_desc(s, st, mxf_wav_descriptor_key, 93);
 676 }
 677
 678 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)
 679 {
 680     mxf_write_generic_sound_desc(s, st, mxf_aes3_descriptor_key, 93);
 681 }
 682
 683 static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)
 684 {
 685     ByteIOContext *pb = s->pb;
 686     int i;
 687
 688     if (type == MaterialPackage) {
 689         mxf_write_metadata_key(pb, 0x013600);
 690         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);
 691         klv_encode_ber_length(pb, 92 + 16 * s->nb_streams);
 692     } else {
 693         mxf_write_metadata_key(pb, 0x013700);
 694         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);
 695         klv_encode_ber_length(pb, 112 + 16 * s->nb_streams); // 20 bytes length for descriptor reference
 696     }
 697
 698     // write uid
 699     mxf_write_local_tag(pb, 16, 0x3C0A);
 700     mxf_write_uuid(pb, type, 0);
 701     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);
 702     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);
 703
 704     // write package umid
 705     mxf_write_local_tag(pb, 32, 0x4401);
 706     mxf_write_umid(pb, type, 0);
 707     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);
 708
 709     // write create date
 710     mxf_write_local_tag(pb, 8, 0x4405);
 711     put_be64(pb, 0);
 712
 713     // write modified date
 714     mxf_write_local_tag(pb, 8, 0x4404);
 715     put_be64(pb, 0);
 716
 717     // write track refs
 718     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x4403);
 719     mxf_write_refs_count(pb, s->nb_streams);
 720     for (i = 0; i < s->nb_streams; i++)
 721         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);
 722
 723     // write multiple descriptor reference
 724     if (type == SourcePackage) {
 725         mxf_write_local_tag(pb, 16, 0x4701);
 726         if (s->nb_streams > 1) {
 727             mxf_write_uuid(pb, MultipleDescriptor, 0);
 728             mxf_write_multi_descriptor(s);
 729         } else
 730             mxf_write_uuid(pb, SubDescriptor, 0);
 731     }
 732
 733     for (i = 0; i < s->nb_streams; i++) {
 734         AVStream *st = s->streams[i];
 735         mxf_write_track(s, st, type);
 736         mxf_write_sequence(s, st, type);
 737         mxf_write_structural_component(s, st, type);
 738
 739         if (type == SourcePackage) {
 740             MXFStreamContext *sc = st->priv_data;
 741             mxf_essence_container_uls[sc->index].write_desc(s, st);
 742         }
 743     }
 744 }
 745
 746 static int mxf_write_essence_container_data(AVFormatContext *s)
 747 {
 748     ByteIOContext *pb = s->pb;
 749
 750     mxf_write_metadata_key(pb, 0x012300);
 751     klv_encode_ber_length(pb, 64);
 752
 753     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID
 754     mxf_write_uuid(pb, EssenceContainerData, 0);
 755
 756     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID
 757     mxf_write_umid(pb, SourcePackage, 0);
 758
 759     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID
 760     put_be32(pb, 1);
 761
 762     return 0;
 763 }
 764
 765 static int mxf_write_header_metadata_sets(AVFormatContext *s)
 766 {
 767     mxf_write_preface(s);
 768     mxf_write_identification(s);
 769     mxf_write_content_storage(s);
 770     mxf_write_package(s, MaterialPackage);
 771     mxf_write_package(s, SourcePackage);
 772     mxf_write_essence_container_data(s);
 773     return 0;
 774 }
 775
 776 static void mxf_write_partition(AVFormatContext *s, int bodysid, const uint8_t *key, int write_metadata)
 777 {
 778     MXFContext *mxf = s->priv_data;
 779     ByteIOContext *pb = s->pb;
 780     int64_t header_byte_count_offset;
 781
 782     // write klv
 783     put_buffer(pb, key, 16);
 784
 785     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);
 786
 787     // write partition value
 788     put_be16(pb, 1); // majorVersion
 789     put_be16(pb, 2); // minorVersion
 790     put_be32(pb, 1); // kagSize
 791
 792     put_be64(pb, url_ftell(pb) - 25); // thisPartition
 793     put_be64(pb, 0); // previousPartition
 794
 795     put_be64(pb, mxf->footer_partition_offset); // footerPartition
 796
 797     // set offset
 798     header_byte_count_offset = url_ftell(pb);
 799     put_be64(pb, 0); // headerByteCount, update later
 800
 801     // no indexTable
 802     put_be64(pb, 0); // indexByteCount
 803     put_be32(pb, 0); // indexSID
 804     put_be64(pb, 0); // bodyOffset
 805
 806     put_be32(pb, bodysid); // bodySID
 807     put_buffer(pb, op1a_ul, 16); // operational pattern
 808
 809     // essence container
 810     mxf_write_essence_container_refs(s);
 811
 812     if (write_metadata) {
 813         // mark the start of the headermetadata and calculate metadata size
 814         int64_t pos, start = url_ftell(s->pb);
 815         mxf_write_primer_pack(s);
 816         mxf_write_header_metadata_sets(s);
 817         pos = url_ftell(s->pb);
 818         // update header_byte_count
 819         url_fseek(pb, header_byte_count_offset, SEEK_SET);
 820         put_be64(pb, pos - start);
 821         url_fseek(pb, pos, SEEK_SET);
 822     }
 823
 824     put_flush_packet(pb);
 825 }
 826
 827 static const UID mxf_mpeg2_codec_uls[] = {
 828     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame
 829     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP
 830     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame
 831     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP
 832     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame
 833     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP
 834     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame
 835     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP
 836 };
 837
 838 static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)
 839 {
 840     if (avctx->profile == 4) { // Main
 841         if (avctx->level == 8) // Main
 842             return avctx->gop_size ?
 843                 &mxf_mpeg2_codec_uls[1] :
 844                 &mxf_mpeg2_codec_uls[0];
 845         else if (avctx->level == 4) // High
 846             return avctx->gop_size ?
 847                 &mxf_mpeg2_codec_uls[5] :
 848                 &mxf_mpeg2_codec_uls[4];
 849     } else if (avctx->profile == 0) { // 422
 850         if (avctx->level == 5) // Main
 851             return avctx->gop_size ?
 852                 &mxf_mpeg2_codec_uls[3] :
 853                 &mxf_mpeg2_codec_uls[2];
 854         else if (avctx->level == 2) // High
 855             return avctx->gop_size ?
 856                 &mxf_mpeg2_codec_uls[7] :
 857                 &mxf_mpeg2_codec_uls[6];
 858     }
 859     return NULL;
 860 }
 861
 862 static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)
 863 {
 864     MXFStreamContext *sc = st->priv_data;
 865     uint32_t c = -1;
 866     int i;
 867
 868     for(i = 0; i < pkt->size - 4; i++) {
 869         c = (c<<8) + pkt->data[i];
 870         if (c == 0x1B5) {
 871             if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
 872                 st->codec->profile = pkt->data[i+1] & 0x07;
 873                 st->codec->level   = pkt->data[i+2] >> 4;
 874             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext
 875                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame
 876                 break;
 877             }
 878         }
 879     }
 880     sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);
 881     return !!sc->codec_ul;
 882 }
 883
 884 static int ff_audio_interleave_init(AVFormatContext *s, const int *samples_per_frame)
 885 {
 886     int i;
 887
 888     if (!samples_per_frame)
 889         return -1;
 890
 891     for (i = 0; i < s->nb_streams; i++) {
 892         AVStream *st = s->streams[i];
 893         AudioInterleaveContext *aic = st->priv_data;
 894
 895         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
 896             aic->sample_size = (st->codec->channels *
 897                                 av_get_bits_per_sample(st->codec->codec_id)) / 8;
 898             if (!aic->sample_size) {
 899                 av_log(s, AV_LOG_ERROR, "could not compute sample size\n");
 900                 return -1;
 901             }
 902             aic->samples_per_frame = samples_per_frame;
 903             aic->samples = aic->samples_per_frame;
 904
 905             av_fifo_init(&aic->fifo, 100 * *aic->samples);
 906         }
 907     }
 908
 909     return 0;
 910 }
 911
 912 static void ff_audio_interleave_close(AVFormatContext *s)
 913 {
 914     int i;
 915     for (i = 0; i < s->nb_streams; i++) {
 916         AVStream *st = s->streams[i];
 917         AudioInterleaveContext *aic = st->priv_data;
 918
 919         if (st->codec->codec_type == CODEC_TYPE_AUDIO)
 920             av_fifo_free(&aic->fifo);
 921     }
 922 }
 923
 924 static int mxf_write_header(AVFormatContext *s)
 925 {
 926     MXFContext *mxf = s->priv_data;
 927     int i;
 928     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};
 929     const int *samples_per_frame = NULL;
 930
 931     for (i = 0; i < s->nb_streams; i++) {
 932         AVStream *st = s->streams[i];
 933         MXFStreamContext *sc = av_mallocz(sizeof(*sc));
 934         if (!sc)
 935             return AVERROR(ENOMEM);
 936         st->priv_data = sc;
 937
 938         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
 939             if (!av_cmp_q(st->codec->time_base, (AVRational){ 1, 25 })) {
 940                 samples_per_frame = PAL_samples_per_frame;
 941                 mxf->time_base = (AVRational){ 1, 25 };
 942             } else if (!av_cmp_q(st->codec->time_base, (AVRational){ 1001, 30000 })) {
 943                 samples_per_frame = NTSC_samples_per_frame;
 944                 mxf->time_base = (AVRational){ 1001, 30000 };
 945             } else {
 946                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");
 947                 return -1;
 948             }
 949         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
 950             if (st->codec->sample_rate != 48000) {
 951                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");
 952                 return -1;
 953             }
 954         }
 955         sc->duration = -1;
 956
 957         sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);
 958         if (sc->index == -1) {
 959             av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "
 960                    "codec not currently supported in container\n", i);
 961             return -1;
 962         }
 963
 964         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;
 965
 966         if (!present[sc->index]) {
 967             mxf->essence_containers_indices[mxf->essence_container_count++] = sc->index;
 968             present[sc->index] = 1;
 969         } else
 970             present[sc->index]++;
 971         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);
 972         sc->track_essence_element_key[15] = present[sc->index];
 973         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);
 974     }
 975
 976     for (i = 0; i < s->nb_streams; i++) {
 977         MXFStreamContext *sc = s->streams[i]->priv_data;
 978         av_set_pts_info(s->streams[i], 64, mxf->time_base.num, mxf->time_base.den);
 979         // update element count
 980         sc->track_essence_element_key[13] = present[sc->index];
 981         sc->order = AV_RB32(sc->track_essence_element_key+12);
 982     }
 983
 984     if (!samples_per_frame)
 985         samples_per_frame = PAL_samples_per_frame;
 986
 987     if (ff_audio_interleave_init(s, samples_per_frame) < 0)
 988         return -1;
 989
 990     return 0;
 991 }
 992
 993 static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
 994 {
 995     MXFContext *mxf = s->priv_data;
 996     ByteIOContext *pb = s->pb;
 997     AVStream *st = s->streams[pkt->stream_index];
 998     MXFStreamContext *sc = st->priv_data;
 999
1000     if (!mxf->header_written) {
1001         if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
1002             if (!mxf_parse_mpeg2_frame(s, st, pkt)) {
1003                 av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
1004                 return -1;
1005             }
1006         }
1007         mxf_write_partition(s, 1, header_open_partition_key, 1);
1008         mxf->header_written = 1;
1009     }
1010
1011     put_buffer(pb, sc->track_essence_element_key, 16); // write key
1012     klv_encode_ber_length(pb, pkt->size); // write length
1013     put_buffer(pb, pkt->data, pkt->size); // write value
1014
1015     sc->duration = FFMAX(pkt->pts + pkt->duration, sc->duration);
1016
1017     put_flush_packet(pb);
1018     return 0;
1019 }
1020
1021 static int mxf_write_footer(AVFormatContext *s)
1022 {
1023     MXFContext *mxf = s->priv_data;
1024     ByteIOContext *pb = s->pb;
1025
1026     mxf->footer_partition_offset = url_ftell(pb);
1027     mxf_write_partition(s, 0, footer_partition_key, 0);
1028     if (!url_is_streamed(s->pb)) {
1029         url_fseek(pb, 0, SEEK_SET);
1030         mxf_write_partition(s, 1, header_closed_partition_key, 1);
1031     }
1032
1033     ff_audio_interleave_close(s);
1034
1035     mxf_free(s);
1036     return 0;
1037 }
1038
1039 static int mxf_interleave_new_audio_packet(AVFormatContext *s, AVPacket *pkt,
1040                                            int stream_index, int flush)
1041 {
1042     AVStream *st = s->streams[stream_index];
1043     AudioInterleaveContext *aic = st->priv_data;
1044
1045     int size = FFMIN(av_fifo_size(&aic->fifo), *aic->samples * aic->sample_size);
1046     if (!size || (!flush && size == av_fifo_size(&aic->fifo)))
1047         return 0;
1048
1049     av_new_packet(pkt, size);
1050     av_fifo_read(&aic->fifo, pkt->data, size);
1051
1052     pkt->dts = pkt->pts = aic->dts;
1053     pkt->duration = av_rescale_q(*aic->samples,
1054                                  (AVRational){ 1, st->codec->sample_rate },
1055                                  st->time_base);
1056     pkt->stream_index = stream_index;
1057     aic->dts += pkt->duration;
1058
1059     aic->samples++;
1060     if (!*aic->samples)
1061         aic->samples = aic->samples_per_frame;
1062
1063     return size;
1064 }
1065
1066 static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1067 {
1068     AVPacketList *pktl;
1069     int stream_count = 0;
1070     int streams[MAX_STREAMS];
1071
1072     memset(streams, 0, sizeof(streams));
1073     pktl = s->packet_buffer;
1074     while (pktl) {
1075         //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);
1076         if (!streams[pktl->pkt.stream_index])
1077             stream_count++;
1078         streams[pktl->pkt.stream_index]++;
1079         pktl = pktl->next;
1080     }
1081
1082     if (stream_count && (s->nb_streams == stream_count || flush)) {
1083         pktl = s->packet_buffer;
1084         *out = pktl->pkt;
1085         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);
1086         s->packet_buffer = pktl->next;
1087         av_freep(&pktl);
1088
1089         if (flush && stream_count < s->nb_streams) {
1090             // purge packet queue
1091             pktl = s->packet_buffer;
1092             while (pktl) {
1093                 AVPacketList *next = pktl->next;
1094                 av_free_packet(&pktl->pkt);
1095                 av_freep(&pktl);
1096                 pktl = next;
1097             }
1098             s->packet_buffer = NULL;
1099         }
1100
1101         return 1;
1102     } else {
1103         av_init_packet(out);
1104         return 0;
1105     }
1106 }
1107
1108 static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
1109 {
1110     AVStream *st  = s->streams[pkt ->stream_index];
1111     AVStream *st2 = s->streams[next->stream_index];
1112     MXFStreamContext *sc  = st ->priv_data;
1113     MXFStreamContext *sc2 = st2->priv_data;
1114
1115     int64_t left  = st2->time_base.num * (int64_t)st ->time_base.den;
1116     int64_t right = st ->time_base.num * (int64_t)st2->time_base.den;
1117
1118     return next->dts * left > pkt->dts * right || // FIXME this can overflow
1119         (next->dts * left == pkt->dts * right && sc->order < sc2->order);
1120 }
1121
1122 static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1123 {
1124     int i;
1125
1126     if (pkt) {
1127         AVStream *st = s->streams[pkt->stream_index];
1128         AudioInterleaveContext *aic = st->priv_data;
1129         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1130             av_fifo_generic_write(&aic->fifo, pkt->data, pkt->size, NULL);
1131         } else {
1132             // rewrite pts and dts to be decoded time line position
1133             pkt->pts = pkt->dts = aic->dts;
1134             aic->dts += pkt->duration;
1135             ff_interleave_add_packet(s, pkt, mxf_compare_timestamps);
1136         }
1137         pkt = NULL;
1138     }
1139
1140     for (i = 0; i < s->nb_streams; i++) {
1141         AVStream *st = s->streams[i];
1142         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1143             AVPacket new_pkt;
1144             while (mxf_interleave_new_audio_packet(s, &new_pkt, i, flush))
1145                 ff_interleave_add_packet(s, &new_pkt, mxf_compare_timestamps);
1146         }
1147     }
1148
1149     return mxf_interleave_get_packet(s, out, pkt, flush);
1150 }
1151
1152 AVOutputFormat mxf_muxer = {
1153     "mxf",
1154     NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1155     NULL,
1156     "mxf",
1157     sizeof(MXFContext),
1158     CODEC_ID_PCM_S16LE,
1159     CODEC_ID_MPEG2VIDEO,
1160     mxf_write_header,
1161     mxf_write_packet,
1162     mxf_write_footer,
1163     0,
1164     NULL,
1165     mxf_interleave,
1166 };