libavformat/mxfenc.c

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