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  *
   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_aes3_desc(AVFormatContext *s, AVStream *st);
  74 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st);
  75
  76 static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {
  77     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },
  78       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },
  79       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },
  80       CODEC_ID_MPEG2VIDEO, mxf_write_mpegvideo_desc },
  81     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },
  82       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },
  83       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
  84       CODEC_ID_PCM_S16LE, mxf_write_aes3_desc },
  85     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },
  86       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },
  87       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
  88       CODEC_ID_PCM_S16LE, mxf_write_wav_desc },
  89     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
  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       CODEC_ID_NONE, NULL },
  93 };
  94
  95 typedef struct MXFContext {
  96     int64_t footer_partition_offset;
  97     int essence_container_count;
  98     uint8_t essence_containers_indices[FF_ARRAY_ELEMS(mxf_essence_container_uls)];
  99     AVRational time_base;
 100     int header_written;
 101 } MXFContext;
 102
 103 static const uint8_t uuid_base[]            = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };
 104 static const uint8_t umid_base[]            = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x01,0x0D,0x00,0x13,0x00,0x00,0x00 };
 105
 106 /**
 107  * complete key for operation pattern, partitions, and primer pack
 108  */
 109 static const uint8_t op1a_ul[]              = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x01,0x00 };
 110 static const uint8_t footer_partition_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }; // ClosedComplete
 111 static const uint8_t primer_pack_key[]      = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x05,0x01,0x00 };
 112
 113
 114 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
 115 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
 116
 117 /**
 118  * partial key for header metadata
 119  */
 120 static const uint8_t header_metadata_key[]  = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01 };
 121
 122 static const uint8_t multiple_desc_ul[] = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x0D,0x01,0x03,0x01,0x02,0x7F,0x01,0x00 };
 123
 124 /**
 125  * SMPTE RP210 http://www.smpte-ra.org/mdd/index.html
 126  */
 127 static const MXFLocalTagPair mxf_local_tag_batch[] = {
 128     // preface set
 129     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */
 130     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */
 131     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */
 132     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */
 133     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */
 134     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */
 135     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */
 136     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */
 137     // Identification
 138     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */
 139     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */
 140     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */
 141     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */
 142     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */
 143     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */
 144     // Content Storage
 145     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */
 146     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */
 147     // Essence Container Data
 148     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */
 149     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */
 150     // Package
 151     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */
 152     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */
 153     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */
 154     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */
 155     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */
 156     // Track
 157     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */
 158     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */
 159     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */
 160     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */
 161     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */
 162     // Sequence
 163     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */
 164     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */
 165     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */
 166     // Source Clip
 167     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */
 168     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */
 169     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */
 170     // File Descriptor
 171     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */
 172     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */
 173     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */
 174     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */
 175     // Generic Picture Essence Descriptor
 176     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */
 177     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */
 178     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */
 179     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */
 180     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */
 181     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */
 182     // Generic Sound Essence Descriptor
 183     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */
 184     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */
 185     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */
 186     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */
 187     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */
 188 };
 189
 190 static void mxf_write_uuid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
 191 {
 192     put_buffer(pb, uuid_base, 12);
 193     put_be16(pb, type);
 194     put_be16(pb, value);
 195 }
 196
 197 static void mxf_write_umid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
 198 {
 199     put_buffer(pb, umid_base, 16);
 200     mxf_write_uuid(pb, type, value);
 201 }
 202
 203 static void mxf_write_refs_count(ByteIOContext *pb, int ref_count)
 204 {
 205     put_be32(pb, ref_count);
 206     put_be32(pb, 16);
 207 }
 208
 209 static int klv_encode_ber_length(ByteIOContext *pb, uint64_t len)
 210 {
 211     // Determine the best BER size
 212     int size;
 213     if (len < 128) {
 214         //short form
 215         put_byte(pb, len);
 216         return 1;
 217     }
 218
 219     size = (av_log2(len) >> 3) + 1;
 220
 221     // long form
 222     put_byte(pb, 0x80 + size);
 223     while(size) {
 224         size --;
 225         put_byte(pb, len >> 8 * size & 0xff);
 226     }
 227     return 0;
 228 }
 229
 230 /*
 231  * Get essence container ul index
 232  */
 233 static int mxf_get_essence_container_ul_index(enum CodecID id)
 234 {
 235     int i;
 236     for (i = 0; i < FF_ARRAY_ELEMS(mxf_essence_container_uls); i++)
 237         if (mxf_essence_container_uls[i].id == id)
 238             return i;
 239     return -1;
 240 }
 241
 242 static void mxf_write_primer_pack(AVFormatContext *s)
 243 {
 244     ByteIOContext *pb = s->pb;
 245     int local_tag_number, i = 0;
 246
 247     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);
 248
 249     put_buffer(pb, primer_pack_key, 16);
 250     klv_encode_ber_length(pb, local_tag_number * 18 + 8);
 251
 252     put_be32(pb, local_tag_number); // local_tag num
 253     put_be32(pb, 18); // item size, always 18 according to the specs
 254
 255     for (i = 0; i < local_tag_number; i++) {
 256         put_be16(pb, mxf_local_tag_batch[i].local_tag);
 257         put_buffer(pb, mxf_local_tag_batch[i].uid, 16);
 258     }
 259 }
 260
 261 static void mxf_write_local_tag(ByteIOContext *pb, int size, int tag)
 262 {
 263     put_be16(pb, tag);
 264     put_be16(pb, size);
 265 }
 266
 267 static void mxf_write_metadata_key(ByteIOContext *pb, unsigned int value)
 268 {
 269     put_buffer(pb, header_metadata_key, 13);
 270     put_be24(pb, value);
 271 }
 272
 273 static void mxf_free(AVFormatContext *s)
 274 {
 275     int i;
 276
 277     for (i = 0; i < s->nb_streams; i++) {
 278         AVStream *st = s->streams[i];
 279         av_freep(&st->priv_data);
 280     }
 281 }
 282
 283 static const MXFDataDefinitionUL *mxf_get_data_definition_ul(enum CodecType type)
 284 {
 285     const MXFDataDefinitionUL *uls = ff_mxf_data_definition_uls;
 286     while (uls->type != CODEC_TYPE_DATA) {
 287         if (type == uls->type)
 288             break;
 289         uls++;
 290     }
 291     return uls;
 292 }
 293
 294 static void mxf_write_essence_container_refs(AVFormatContext *s)
 295 {
 296     MXFContext *c = s->priv_data;
 297     ByteIOContext *pb = s->pb;
 298     int i;
 299
 300     mxf_write_refs_count(pb, c->essence_container_count);
 301     av_log(s,AV_LOG_DEBUG, "essence container count:%d\n", c->essence_container_count);
 302     for (i = 0; i < c->essence_container_count; i++) {
 303         put_buffer(pb, mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul, 16);
 304         PRINT_KEY(s, "essence container ul:\n", mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul);
 305     }
 306 }
 307
 308 static void mxf_write_preface(AVFormatContext *s)
 309 {
 310     MXFContext *mxf = s->priv_data;
 311     ByteIOContext *pb = s->pb;
 312
 313     mxf_write_metadata_key(pb, 0x012f00);
 314     PRINT_KEY(s, "preface key", pb->buf_ptr - 16);
 315     klv_encode_ber_length(pb, 130 + 16 * mxf->essence_container_count);
 316
 317     // write preface set uid
 318     mxf_write_local_tag(pb, 16, 0x3C0A);
 319     mxf_write_uuid(pb, Preface, 0);
 320     PRINT_KEY(s, "preface uid", pb->buf_ptr - 16);
 321
 322     // write create date as unknown
 323     mxf_write_local_tag(pb, 8, 0x3B02);
 324     put_be64(pb, 0);
 325
 326     // write version
 327     mxf_write_local_tag(pb, 2, 0x3B05);
 328     put_be16(pb, 1);
 329
 330     // write identification_refs
 331     mxf_write_local_tag(pb, 16 + 8, 0x3B06);
 332     mxf_write_refs_count(pb, 1);
 333     mxf_write_uuid(pb, Identification, 0);
 334
 335     // write content_storage_refs
 336     mxf_write_local_tag(pb, 16, 0x3B03);
 337     mxf_write_uuid(pb, ContentStorage, 0);
 338
 339     mxf_write_local_tag(pb, 16, 0x3B09);
 340     put_buffer(pb, op1a_ul, 16);
 341
 342     // write essence_container_refs
 343     mxf_write_local_tag(pb, 8 + 16 * mxf->essence_container_count, 0x3B0A);
 344     mxf_write_essence_container_refs(s);
 345
 346     // write dm_scheme_refs
 347     mxf_write_local_tag(pb, 8, 0x3B0B);
 348     put_be64(pb, 0);
 349 }
 350
 351 /*
 352  * Write a local tag containing an ascii string as utf-16
 353  */
 354 static void mxf_write_local_tag_utf16(ByteIOContext *pb, int tag, const char *value)
 355 {
 356     int i, size = strlen(value);
 357     mxf_write_local_tag(pb, size*2, tag);
 358     for (i = 0; i < size; i++)
 359         put_be16(pb, value[i]);
 360 }
 361
 362 static void mxf_write_identification(AVFormatContext *s)
 363 {
 364     ByteIOContext *pb = s->pb;
 365     const char *company = "FFmpeg";
 366     const char *product = "OP1a Muxer";
 367     const char *version;
 368     int length;
 369
 370     mxf_write_metadata_key(pb, 0x013000);
 371     PRINT_KEY(s, "identification key", pb->buf_ptr - 16);
 372
 373     version = s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT ?
 374         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);
 375     length = 84 + (strlen(company)+strlen(product)+strlen(version))*2; // utf-16
 376     klv_encode_ber_length(pb, length);
 377
 378     // write uid
 379     mxf_write_local_tag(pb, 16, 0x3C0A);
 380     mxf_write_uuid(pb, Identification, 0);
 381     PRINT_KEY(s, "identification uid", pb->buf_ptr - 16);
 382
 383     // write generation uid
 384     mxf_write_local_tag(pb, 16, 0x3C09);
 385     mxf_write_uuid(pb, Identification, 1);
 386
 387     mxf_write_local_tag_utf16(pb, 0x3C01, company); // Company Name
 388     mxf_write_local_tag_utf16(pb, 0x3C02, product); // Product Name
 389     mxf_write_local_tag_utf16(pb, 0x3C04, version); // Version String
 390
 391     // write product uid
 392     mxf_write_local_tag(pb, 16, 0x3C05);
 393     mxf_write_uuid(pb, Identification, 2);
 394
 395     // write modified date
 396     mxf_write_local_tag(pb, 8, 0x3C06);
 397     put_be64(pb, 0);
 398 }
 399
 400 static void mxf_write_content_storage(AVFormatContext *s)
 401 {
 402     ByteIOContext *pb = s->pb;
 403
 404     mxf_write_metadata_key(pb, 0x011800);
 405     PRINT_KEY(s, "content storage key", pb->buf_ptr - 16);
 406     klv_encode_ber_length(pb, 92);
 407
 408     // write uid
 409     mxf_write_local_tag(pb, 16, 0x3C0A);
 410     mxf_write_uuid(pb, ContentStorage, 0);
 411     PRINT_KEY(s, "content storage uid", pb->buf_ptr - 16);
 412
 413     // write package reference
 414     mxf_write_local_tag(pb, 16 * 2 + 8, 0x1901);
 415     mxf_write_refs_count(pb, 2);
 416     mxf_write_uuid(pb, MaterialPackage, 0);
 417     mxf_write_uuid(pb, SourcePackage, 0);
 418
 419     // write essence container data
 420     mxf_write_local_tag(pb, 8 + 16, 0x1902);
 421     mxf_write_refs_count(pb, 1);
 422     mxf_write_uuid(pb, EssenceContainerData, 0);
 423 }
 424
 425 static void mxf_write_track(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 426 {
 427     ByteIOContext *pb = s->pb;
 428     MXFStreamContext *sc = st->priv_data;
 429
 430     mxf_write_metadata_key(pb, 0x013b00);
 431     PRINT_KEY(s, "track key", pb->buf_ptr - 16);
 432     klv_encode_ber_length(pb, 80);
 433
 434     // write track uid
 435     mxf_write_local_tag(pb, 16, 0x3C0A);
 436     mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, st->index);
 437     PRINT_KEY(s, "track uid", pb->buf_ptr - 16);
 438
 439     // write track id
 440     mxf_write_local_tag(pb, 4, 0x4801);
 441     put_be32(pb, st->index);
 442
 443     // write track number
 444     mxf_write_local_tag(pb, 4, 0x4804);
 445     if (type == MaterialPackage)
 446         put_be32(pb, 0); // track number of material package is 0
 447     else
 448         put_buffer(pb, sc->track_essence_element_key + 12, 4);
 449
 450     mxf_write_local_tag(pb, 8, 0x4B01);
 451     put_be32(pb, st->time_base.den);
 452     put_be32(pb, st->time_base.num);
 453
 454     // write origin
 455     mxf_write_local_tag(pb, 8, 0x4B02);
 456     put_be64(pb, 0);
 457
 458     // write sequence refs
 459     mxf_write_local_tag(pb, 16, 0x4803);
 460     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 461 }
 462
 463 static void mxf_write_common_fields(ByteIOContext *pb, AVStream *st)
 464 {
 465     const MXFDataDefinitionUL *data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);
 466     MXFStreamContext *sc = st->priv_data;
 467
 468     // find data define uls
 469     mxf_write_local_tag(pb, 16, 0x0201);
 470     put_buffer(pb, data_def_ul->uid, 16);
 471
 472     // write duration
 473     mxf_write_local_tag(pb, 8, 0x0202);
 474     put_be64(pb, sc->duration);
 475 }
 476
 477 static void mxf_write_sequence(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 478 {
 479     ByteIOContext *pb = s->pb;
 480
 481     mxf_write_metadata_key(pb, 0x010f00);
 482     PRINT_KEY(s, "sequence key", pb->buf_ptr - 16);
 483     klv_encode_ber_length(pb, 80);
 484
 485     mxf_write_local_tag(pb, 16, 0x3C0A);
 486     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 487
 488     PRINT_KEY(s, "sequence uid", pb->buf_ptr - 16);
 489     mxf_write_common_fields(pb, st);
 490
 491     // write structural component
 492     mxf_write_local_tag(pb, 16 + 8, 0x1001);
 493     mxf_write_refs_count(pb, 1);
 494     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
 495 }
 496
 497 static void mxf_write_structural_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 498 {
 499     ByteIOContext *pb = s->pb;
 500     int i;
 501
 502     mxf_write_metadata_key(pb, 0x011100);
 503     PRINT_KEY(s, "sturctural component key", pb->buf_ptr - 16);
 504     klv_encode_ber_length(pb, 108);
 505
 506     // write uid
 507     mxf_write_local_tag(pb, 16, 0x3C0A);
 508     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
 509
 510     PRINT_KEY(s, "structural component uid", pb->buf_ptr - 16);
 511     mxf_write_common_fields(pb, st);
 512
 513     // write start_position
 514     mxf_write_local_tag(pb, 8, 0x1201);
 515     put_be64(pb, 0);
 516
 517     // write source package uid, end of the reference
 518     mxf_write_local_tag(pb, 32, 0x1101);
 519     if (type == SourcePackage) {
 520         for (i = 0; i < 4; i++)
 521             put_be64(pb, 0);
 522     } else
 523         mxf_write_umid(pb, SourcePackage, 0);
 524
 525     // write source track id
 526     mxf_write_local_tag(pb, 4, 0x1102);
 527     if (type == SourcePackage)
 528         put_be32(pb, 0);
 529     else
 530         put_be32(pb, st->index);
 531 }
 532
 533 static void mxf_write_multi_descriptor(AVFormatContext *s)
 534 {
 535     ByteIOContext *pb = s->pb;
 536     int i;
 537
 538     mxf_write_metadata_key(pb, 0x014400);
 539     PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);
 540     klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);
 541
 542     mxf_write_local_tag(pb, 16, 0x3C0A);
 543     mxf_write_uuid(pb, MultipleDescriptor, 0);
 544     PRINT_KEY(s, "multi_desc uid", pb->buf_ptr - 16);
 545
 546     // write sample rate
 547     mxf_write_local_tag(pb, 8, 0x3001);
 548     put_be32(pb, s->streams[0]->time_base.den);
 549     put_be32(pb, s->streams[0]->time_base.num);
 550
 551     // write essence container ul
 552     mxf_write_local_tag(pb, 16, 0x3004);
 553     put_buffer(pb, multiple_desc_ul, 16);
 554
 555     // write sub descriptor refs
 556     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x3F01);
 557     mxf_write_refs_count(pb, s->nb_streams);
 558     for (i = 0; i < s->nb_streams; i++)
 559         mxf_write_uuid(pb, SubDescriptor, i);
 560 }
 561
 562 static void mxf_write_generic_desc(ByteIOContext *pb, AVStream *st, const UID key, unsigned size)
 563 {
 564     MXFStreamContext *sc = st->priv_data;
 565
 566     put_buffer(pb, key, 16);
 567     klv_encode_ber_length(pb, size);
 568
 569     mxf_write_local_tag(pb, 16, 0x3C0A);
 570     mxf_write_uuid(pb, SubDescriptor, st->index);
 571
 572     mxf_write_local_tag(pb, 4, 0x3006);
 573     put_be32(pb, st->index);
 574
 575     mxf_write_local_tag(pb, 8, 0x3001);
 576     put_be32(pb, st->time_base.den);
 577     put_be32(pb, st->time_base.num);
 578
 579     mxf_write_local_tag(pb, 16, 0x3004);
 580     put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
 581 }
 582
 583 static const UID mxf_mpegvideo_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 };
 584 static const UID mxf_wav_descriptor_key       = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 };
 585 static const UID mxf_aes3_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 };
 586
 587 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
 588 {
 589     MXFStreamContext *sc = st->priv_data;
 590     ByteIOContext *pb = s->pb;
 591     int stored_height = (st->codec->height+15)/16*16;
 592     AVRational dar;
 593     int f1, f2;
 594
 595     mxf_write_generic_desc(pb, st, mxf_mpegvideo_descriptor_key, 133);
 596
 597     mxf_write_local_tag(pb, 4, 0x3203);
 598     put_be32(pb, st->codec->width);
 599
 600     mxf_write_local_tag(pb, 4, 0x3202);
 601     put_be32(pb, stored_height>>sc->interlaced);
 602
 603     // frame layout
 604     mxf_write_local_tag(pb, 1, 0x320C);
 605     put_byte(pb, sc->interlaced);
 606
 607     // video line map
 608     mxf_write_local_tag(pb, 16, 0x320D);
 609     put_be32(pb, 2);
 610     put_be32(pb, 4);
 611     switch (st->codec->height) {
 612     case  576: f1 = 23; f2 = 336; break;
 613     case  608: f1 =  7; f2 = 320; break;
 614     case  480: f1 = 20; f2 = 283; break;
 615     case  512: f1 =  7; f2 = 270; break;
 616     case  720: f1 = 26; f2 =   0; break; // progressive
 617     case 1080: f1 = 21; f2 = 584; break;
 618     default:   f1 =  0; f2 =   0; break;
 619     }
 620
 621     if (!sc->interlaced) {
 622         f2  = 0;
 623         f1 *= 2;
 624     }
 625
 626     put_be32(pb, f1);
 627     put_be32(pb, f2);
 628
 629     av_reduce(&dar.num, &dar.den,
 630               st->codec->width*st->codec->sample_aspect_ratio.num,
 631               st->codec->height*st->codec->sample_aspect_ratio.den,
 632               1024*1024);
 633
 634     mxf_write_local_tag(pb, 8, 0x320E);
 635     put_be32(pb, dar.num);
 636     put_be32(pb, dar.den);
 637
 638     mxf_write_local_tag(pb, 16, 0x3201);
 639     put_buffer(pb, *sc->codec_ul, 16);
 640 }
 641
 642 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 643 {
 644     ByteIOContext *pb = s->pb;
 645
 646     mxf_write_generic_desc(pb, st, key, size);
 647
 648     // audio locked
 649     mxf_write_local_tag(pb, 1, 0x3D02);
 650     put_byte(pb, 1);
 651
 652     // write audio sampling rate
 653     mxf_write_local_tag(pb, 8, 0x3D03);
 654     put_be32(pb, st->codec->sample_rate);
 655     put_be32(pb, 1);
 656
 657     mxf_write_local_tag(pb, 4, 0x3D07);
 658     put_be32(pb, st->codec->channels);
 659
 660     mxf_write_local_tag(pb, 4, 0x3D01);
 661     put_be32(pb, st->codec->bits_per_coded_sample);
 662 }
 663
 664 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)
 665 {
 666     mxf_write_generic_sound_desc(s, st, mxf_wav_descriptor_key, 93);
 667 }
 668
 669 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)
 670 {
 671     mxf_write_generic_sound_desc(s, st, mxf_aes3_descriptor_key, 93);
 672 }
 673
 674 static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)
 675 {
 676     ByteIOContext *pb = s->pb;
 677     int i;
 678
 679     if (type == MaterialPackage) {
 680         mxf_write_metadata_key(pb, 0x013600);
 681         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);
 682         klv_encode_ber_length(pb, 92 + 16 * s->nb_streams);
 683     } else {
 684         mxf_write_metadata_key(pb, 0x013700);
 685         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);
 686         klv_encode_ber_length(pb, 112 + 16 * s->nb_streams); // 20 bytes length for descriptor reference
 687     }
 688
 689     // write uid
 690     mxf_write_local_tag(pb, 16, 0x3C0A);
 691     mxf_write_uuid(pb, type, 0);
 692     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);
 693     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);
 694
 695     // write package umid
 696     mxf_write_local_tag(pb, 32, 0x4401);
 697     mxf_write_umid(pb, type, 0);
 698     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);
 699
 700     // write create date
 701     mxf_write_local_tag(pb, 8, 0x4405);
 702     put_be64(pb, 0);
 703
 704     // write modified date
 705     mxf_write_local_tag(pb, 8, 0x4404);
 706     put_be64(pb, 0);
 707
 708     // write track refs
 709     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x4403);
 710     mxf_write_refs_count(pb, s->nb_streams);
 711     for (i = 0; i < s->nb_streams; i++)
 712         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);
 713
 714     // write multiple descriptor reference
 715     if (type == SourcePackage) {
 716         mxf_write_local_tag(pb, 16, 0x4701);
 717         if (s->nb_streams > 1) {
 718             mxf_write_uuid(pb, MultipleDescriptor, 0);
 719             mxf_write_multi_descriptor(s);
 720         } else
 721             mxf_write_uuid(pb, SubDescriptor, 0);
 722     }
 723
 724     for (i = 0; i < s->nb_streams; i++) {
 725         AVStream *st = s->streams[i];
 726         mxf_write_track(s, st, type);
 727         mxf_write_sequence(s, st, type);
 728         mxf_write_structural_component(s, st, type);
 729
 730         if (type == SourcePackage) {
 731             MXFStreamContext *sc = st->priv_data;
 732             mxf_essence_container_uls[sc->index].write_desc(s, st);
 733         }
 734     }
 735 }
 736
 737 static int mxf_write_essence_container_data(AVFormatContext *s)
 738 {
 739     ByteIOContext *pb = s->pb;
 740
 741     mxf_write_metadata_key(pb, 0x012300);
 742     klv_encode_ber_length(pb, 64);
 743
 744     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID
 745     mxf_write_uuid(pb, EssenceContainerData, 0);
 746
 747     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID
 748     mxf_write_umid(pb, SourcePackage, 0);
 749
 750     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID
 751     put_be32(pb, 1);
 752
 753     return 0;
 754 }
 755
 756 static int mxf_write_header_metadata_sets(AVFormatContext *s)
 757 {
 758     mxf_write_preface(s);
 759     mxf_write_identification(s);
 760     mxf_write_content_storage(s);
 761     mxf_write_package(s, MaterialPackage);
 762     mxf_write_package(s, SourcePackage);
 763     mxf_write_essence_container_data(s);
 764     return 0;
 765 }
 766
 767 static void mxf_write_partition(AVFormatContext *s, int bodysid, const uint8_t *key, int write_metadata)
 768 {
 769     MXFContext *mxf = s->priv_data;
 770     ByteIOContext *pb = s->pb;
 771     int64_t header_byte_count_offset;
 772
 773     // write klv
 774     put_buffer(pb, key, 16);
 775
 776     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);
 777
 778     // write partition value
 779     put_be16(pb, 1); // majorVersion
 780     put_be16(pb, 2); // minorVersion
 781     put_be32(pb, 1); // kagSize
 782
 783     put_be64(pb, url_ftell(pb) - 25); // thisPartition
 784     put_be64(pb, 0); // previousPartition
 785
 786     put_be64(pb, mxf->footer_partition_offset); // footerPartition
 787
 788     // set offset
 789     header_byte_count_offset = url_ftell(pb);
 790     put_be64(pb, 0); // headerByteCount, update later
 791
 792     // no indexTable
 793     put_be64(pb, 0); // indexByteCount
 794     put_be32(pb, 0); // indexSID
 795     put_be64(pb, 0); // bodyOffset
 796
 797     put_be32(pb, bodysid); // bodySID
 798     put_buffer(pb, op1a_ul, 16); // operational pattern
 799
 800     // essence container
 801     mxf_write_essence_container_refs(s);
 802
 803     if (write_metadata) {
 804         // mark the start of the headermetadata and calculate metadata size
 805         int64_t pos, start = url_ftell(s->pb);
 806         mxf_write_primer_pack(s);
 807         mxf_write_header_metadata_sets(s);
 808         pos = url_ftell(s->pb);
 809         // update header_byte_count
 810         url_fseek(pb, header_byte_count_offset, SEEK_SET);
 811         put_be64(pb, pos - start);
 812         url_fseek(pb, pos, SEEK_SET);
 813     }
 814
 815     put_flush_packet(pb);
 816 }
 817
 818 static const UID mxf_mpeg2_codec_uls[] = {
 819     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame
 820     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP
 821     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame
 822     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP
 823     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame
 824     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP
 825     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame
 826     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP
 827 };
 828
 829 static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)
 830 {
 831     if (avctx->profile == 4) { // Main
 832         if (avctx->level == 8) // Main
 833             return avctx->gop_size ?
 834                 &mxf_mpeg2_codec_uls[1] :
 835                 &mxf_mpeg2_codec_uls[0];
 836         else if (avctx->level == 4) // High
 837             return avctx->gop_size ?
 838                 &mxf_mpeg2_codec_uls[5] :
 839                 &mxf_mpeg2_codec_uls[4];
 840     } else if (avctx->profile == 0) { // 422
 841         if (avctx->level == 5) // Main
 842             return avctx->gop_size ?
 843                 &mxf_mpeg2_codec_uls[3] :
 844                 &mxf_mpeg2_codec_uls[2];
 845         else if (avctx->level == 2) // High
 846             return avctx->gop_size ?
 847                 &mxf_mpeg2_codec_uls[7] :
 848                 &mxf_mpeg2_codec_uls[6];
 849     }
 850     return NULL;
 851 }
 852
 853 static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)
 854 {
 855     MXFStreamContext *sc = st->priv_data;
 856     uint32_t c = -1;
 857     int i;
 858
 859     for(i = 0; i < pkt->size - 4; i++) {
 860         c = (c<<8) + pkt->data[i];
 861         if (c == 0x1B5) {
 862             if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
 863                 st->codec->profile = pkt->data[i+1] & 0x07;
 864                 st->codec->level   = pkt->data[i+2] >> 4;
 865             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext
 866                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame
 867                 break;
 868             }
 869         }
 870     }
 871     sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);
 872     return !!sc->codec_ul;
 873 }
 874
 875 static int ff_audio_interleave_init(AVFormatContext *s, const int *samples_per_frame)
 876 {
 877     int i;
 878
 879     if (!samples_per_frame)
 880         samples_per_frame = PAL_samples_per_frame;
 881
 882     for (i = 0; i < s->nb_streams; i++) {
 883         AVStream *st = s->streams[i];
 884         AudioInterleaveContext *aic = st->priv_data;
 885
 886         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
 887             aic->sample_size = (st->codec->channels *
 888                                 av_get_bits_per_sample(st->codec->codec_id)) / 8;
 889             if (!aic->sample_size) {
 890                 av_log(s, AV_LOG_ERROR, "could not compute sample size\n");
 891                 return -1;
 892             }
 893             aic->samples_per_frame = samples_per_frame;
 894             aic->samples = aic->samples_per_frame;
 895
 896             av_fifo_init(&aic->fifo, 100 * *aic->samples);
 897         }
 898     }
 899
 900     return 0;
 901 }
 902
 903 static int mxf_write_header(AVFormatContext *s)
 904 {
 905     MXFContext *mxf = s->priv_data;
 906     int i;
 907     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};
 908     const int *samples_per_frame = NULL;
 909
 910     for (i = 0; i < s->nb_streams; i++) {
 911         AVStream *st = s->streams[i];
 912         MXFStreamContext *sc = av_mallocz(sizeof(*sc));
 913         if (!sc)
 914             return AVERROR(ENOMEM);
 915         st->priv_data = sc;
 916
 917         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
 918             if (!av_cmp_q(st->codec->time_base, (AVRational){ 1, 25 })) {
 919                 samples_per_frame = PAL_samples_per_frame;
 920                 mxf->time_base = (AVRational){ 1, 25 };
 921             } else if (!av_cmp_q(st->codec->time_base, (AVRational){ 1001, 30000 })) {
 922                 samples_per_frame = NTSC_samples_per_frame;
 923                 mxf->time_base = (AVRational){ 1001, 30000 };
 924             } else {
 925                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");
 926                 return -1;
 927             }
 928         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
 929             if (st->codec->sample_rate != 48000) {
 930                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");
 931                 return -1;
 932             }
 933         }
 934         sc->duration = -1;
 935
 936         sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);
 937         if (sc->index == -1) {
 938             av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "
 939                    "codec not currently supported in container\n", i);
 940             return -1;
 941         }
 942
 943         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;
 944
 945         if (!present[sc->index]) {
 946             mxf->essence_containers_indices[mxf->essence_container_count++] = sc->index;
 947             present[sc->index] = 1;
 948         } else
 949             present[sc->index]++;
 950         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);
 951         sc->track_essence_element_key[15] = present[sc->index];
 952         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);
 953     }
 954
 955     for (i = 0; i < s->nb_streams; i++) {
 956         MXFStreamContext *sc = s->streams[i]->priv_data;
 957         av_set_pts_info(s->streams[i], 64, mxf->time_base.num, mxf->time_base.den);
 958         // update element count
 959         sc->track_essence_element_key[13] = present[sc->index];
 960         sc->order = AV_RB32(sc->track_essence_element_key+12);
 961     }
 962
 963     if (ff_audio_interleave_init(s, samples_per_frame) < 0)
 964         return -1;
 965
 966     return 0;
 967 }
 968
 969 static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
 970 {
 971     MXFContext *mxf = s->priv_data;
 972     ByteIOContext *pb = s->pb;
 973     AVStream *st = s->streams[pkt->stream_index];
 974     MXFStreamContext *sc = st->priv_data;
 975
 976     if (!mxf->header_written) {
 977         if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
 978             if (!mxf_parse_mpeg2_frame(s, st, pkt)) {
 979                 av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
 980                 return -1;
 981             }
 982         }
 983         mxf_write_partition(s, 1, header_open_partition_key, 1);
 984         mxf->header_written = 1;
 985     }
 986
 987     put_buffer(pb, sc->track_essence_element_key, 16); // write key
 988     klv_encode_ber_length(pb, pkt->size); // write length
 989     put_buffer(pb, pkt->data, pkt->size); // write value
 990
 991     sc->duration = FFMAX(pkt->pts + pkt->duration, sc->duration);
 992
 993     put_flush_packet(pb);
 994     return 0;
 995 }
 996
 997 static int mxf_write_footer(AVFormatContext *s)
 998 {
 999     MXFContext *mxf = s->priv_data;
1000     ByteIOContext *pb = s->pb;
1001
1002     mxf->footer_partition_offset = url_ftell(pb);
1003     mxf_write_partition(s, 0, footer_partition_key, 0);
1004     if (!url_is_streamed(s->pb)) {
1005         url_fseek(pb, 0, SEEK_SET);
1006         mxf_write_partition(s, 1, header_closed_partition_key, 1);
1007     }
1008     mxf_free(s);
1009     return 0;
1010 }
1011
1012 static int mxf_interleave_new_audio_packet(AVFormatContext *s, AVPacket *pkt,
1013                                            int stream_index, int flush)
1014 {
1015     AVStream *st = s->streams[stream_index];
1016     AudioInterleaveContext *aic = st->priv_data;
1017
1018     int size = FFMIN(av_fifo_size(&aic->fifo), *aic->samples * aic->sample_size);
1019     if (!size || (!flush && size == av_fifo_size(&aic->fifo)))
1020         return 0;
1021
1022     av_new_packet(pkt, size);
1023     av_fifo_read(&aic->fifo, pkt->data, size);
1024
1025     pkt->dts = pkt->pts = aic->dts;
1026     pkt->duration = av_rescale_q(*aic->samples,
1027                                  (AVRational){ 1, st->codec->sample_rate },
1028                                  st->time_base);
1029     pkt->stream_index = stream_index;
1030     aic->dts += pkt->duration;
1031
1032     aic->samples++;
1033     if (!*aic->samples)
1034         aic->samples = aic->samples_per_frame;
1035
1036     return size;
1037 }
1038
1039 static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, int flush)
1040 {
1041     AVPacketList *pktl;
1042     int stream_count = 0;
1043     int streams[MAX_STREAMS];
1044
1045     memset(streams, 0, sizeof(streams));
1046     pktl = s->packet_buffer;
1047     while (pktl) {
1048         //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);
1049         if (!streams[pktl->pkt.stream_index])
1050             stream_count++;
1051         streams[pktl->pkt.stream_index]++;
1052         pktl = pktl->next;
1053     }
1054
1055     if (stream_count && (s->nb_streams == stream_count || flush)) {
1056         pktl = s->packet_buffer;
1057         *out = pktl->pkt;
1058         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);
1059         s->packet_buffer = pktl->next;
1060         av_freep(&pktl);
1061
1062         if (flush && stream_count < s->nb_streams) {
1063             // purge packet queue
1064             pktl = s->packet_buffer;
1065             while (pktl) {
1066                 AVPacketList *next = pktl->next;
1067                 av_free_packet(&pktl->pkt);
1068                 av_freep(&pktl);
1069                 pktl = next;
1070             }
1071             s->packet_buffer = NULL;
1072         }
1073
1074         return 1;
1075     } else {
1076         av_init_packet(out);
1077         return 0;
1078     }
1079 }
1080
1081 static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
1082 {
1083     AVStream *st  = s->streams[pkt ->stream_index];
1084     AVStream *st2 = s->streams[next->stream_index];
1085     MXFStreamContext *sc  = st ->priv_data;
1086     MXFStreamContext *sc2 = st2->priv_data;
1087
1088     int64_t left  = st2->time_base.num * (int64_t)st ->time_base.den;
1089     int64_t right = st ->time_base.num * (int64_t)st2->time_base.den;
1090
1091     return next->dts * left > pkt->dts * right || // FIXME this can overflow
1092         (next->dts * left == pkt->dts * right && sc->order < sc2->order);
1093 }
1094
1095 static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1096 {
1097     int i;
1098
1099     if (pkt) {
1100         AVStream *st = s->streams[pkt->stream_index];
1101         AudioInterleaveContext *aic = st->priv_data;
1102         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1103             av_fifo_generic_write(&aic->fifo, pkt->data, pkt->size, NULL);
1104         } else {
1105             // rewrite pts and dts to be decoded time line position
1106             pkt->pts = pkt->dts = aic->dts;
1107             aic->dts += pkt->duration;
1108             ff_interleave_add_packet(s, pkt, mxf_compare_timestamps);
1109         }
1110     }
1111
1112     for (i = 0; i < s->nb_streams; i++) {
1113         AVStream *st = s->streams[i];
1114         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1115             AVPacket new_pkt;
1116             while (mxf_interleave_new_audio_packet(s, &new_pkt, i, flush))
1117                 ff_interleave_add_packet(s, &new_pkt, mxf_compare_timestamps);
1118         }
1119     }
1120
1121     return mxf_interleave_get_packet(s, out, flush);
1122 }
1123
1124 AVOutputFormat mxf_muxer = {
1125     "mxf",
1126     NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1127     NULL,
1128     "mxf",
1129     sizeof(MXFContext),
1130     CODEC_ID_PCM_S16LE,
1131     CODEC_ID_MPEG2VIDEO,
1132     mxf_write_header,
1133     mxf_write_packet,
1134     mxf_write_footer,
1135     0,
1136     NULL,
1137     mxf_interleave,
1138 };
1139
1140