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FFmpeg/libavformat/mxfenc.c

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  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 "mxf.h"

  35. 

  36. typedef struct {

  37.     int local_tag;

  38.     UID uid;

  39. } MXFLocalTagPair;

  40. 

  41. typedef struct {

  42.     UID track_essence_element_key;

  43.     int index; //<<< index in mxf_essence_container_uls table

  44.     const UID *codec_ul;

  45.     int64_t duration;

  46. } MXFStreamContext;

  47. 

  48. typedef struct {

  49.     UID container_ul;

  50.     UID element_ul;

  51.     UID codec_ul;

  52.     enum CodecID id;

  53.     void (*write_desc)();

  54. } MXFContainerEssenceEntry;

  55. 

  56. static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st);

  57. static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st);

  58. 

  59. static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {

  60.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },

  61.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  62.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },

  63.       CODEC_ID_MPEG2VIDEO, mxf_write_mpegvideo_desc },

  64.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },

  65.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },

  66.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  67.       CODEC_ID_PCM_S16LE, mxf_write_wav_desc },

  68.     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  69.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  70.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  71.       CODEC_ID_NONE, NULL },

  72. };

  73. 

  74. typedef struct MXFContext {

  75.     int64_t footer_partition_offset;

  76.     int essence_container_count;

  77.     uint8_t essence_containers_indices[sizeof(mxf_essence_container_uls)/

  78.                                        sizeof(*mxf_essence_container_uls)];

  79. } MXFContext;

  80. 

  81. static const uint8_t uuid_base[]            = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };

  82. static const uint8_t umid_base[]            = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x0F,0x00,0x13,0x00,0x00,0x00 };

  83. 

  84. /**

  85.  * complete key for operation pattern, partitions, and primer pack

  86.  */

  87. static const uint8_t op1a_ul[]              = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x01,0x00 };

  88. static const uint8_t footer_partition_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }; // ClosedComplete

  89. static const uint8_t primer_pack_key[]      = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x05,0x01,0x00 };

  90. 

  91. 

  92. 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

  93. 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

  94. 

  95. /**

  96.  * partial key for header metadata

  97.  */

  98. static const uint8_t header_metadata_key[]  = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01 };

  99. 

  100. static const uint8_t multiple_desc_ul[] = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x0D,0x01,0x03,0x01,0x02,0x7F,0x01,0x00 };

  101. 

  102. /**

  103.  * SMPTE RP210 http://www.smpte-ra.org/mdd/index.html

  104.  */

  105. static const MXFLocalTagPair mxf_local_tag_batch[] = {

  106.     // preface set

  107.     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */

  108.     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */

  109.     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */

  110.     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */

  111.     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */

  112.     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */

  113.     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */

  114.     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */

  115.     // Identification

  116.     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */

  117.     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */

  118.     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */

  119.     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */

  120.     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */

  121.     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */

  122.     // Content Storage

  123.     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */

  124.     // Essence Container Data

  125.     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */

  126.     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */

  127.     // Package

  128.     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */

  129.     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */

  130.     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */

  131.     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */

  132.     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */

  133.     // Track

  134.     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */

  135.     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */

  136.     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */

  137.     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */

  138.     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */

  139.     // Sequence

  140.     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */

  141.     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */

  142.     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */

  143.     // Source Clip

  144.     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Start position */

  145.     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */

  146.     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */

  147.     // File Descriptor

  148.     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */

  149.     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */

  150.     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */

  151.     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */

  152.     // Generic Picture Essence Descriptor

  153.     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */

  154.     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */

  155.     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */

  156.     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */

  157.     // Generic Sound Essence Descriptor

  158.     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */

  159.     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */

  160.     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */

  161.     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */

  162. };

  163. 

  164. static void mxf_write_uuid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)

  165. {

  166.     put_buffer(pb, uuid_base, 12);

  167.     put_be16(pb, type);

  168.     put_be16(pb, value);

  169. }

  170. 

  171. static void mxf_write_umid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)

  172. {

  173.     put_buffer(pb, umid_base, 16);

  174.     mxf_write_uuid(pb, type, value);

  175. }

  176. 

  177. static void mxf_write_refs_count(ByteIOContext *pb, int ref_count)

  178. {

  179.     put_be32(pb, ref_count);

  180.     put_be32(pb, 16);

  181. }

  182. 

  183. static int klv_encode_ber_length(ByteIOContext *pb, uint64_t len)

  184. {

  185.     // Determine the best BER size

  186.     int size;

  187.     if (len < 128) {

  188.         //short form

  189.         put_byte(pb, len);

  190.         return 1;

  191.     }

  192. 

  193.     size = (av_log2(len) >> 3) + 1;

  194. 

  195.     // long form

  196.     put_byte(pb, 0x80 + size);

  197.     while(size) {

  198.         size --;

  199.         put_byte(pb, len >> 8 * size & 0xff);

  200.     }

  201.     return 0;

  202. }

  203. 

  204. /*

  205.  * Get essence container ul index

  206.  */

  207. static int mxf_get_essence_container_ul_index(enum CodecID id)

  208. {

  209.     int i;

  210.     for (i = 0; i < sizeof(mxf_essence_container_uls)/

  211.                     sizeof(*mxf_essence_container_uls); i++)

  212.         if (mxf_essence_container_uls[i].id == id)

  213.             return i;

  214.     return -1;

  215. }

  216. 

  217. static void mxf_write_primer_pack(AVFormatContext *s)

  218. {

  219.     ByteIOContext *pb = s->pb;

  220.     int local_tag_number, i = 0;

  221. 

  222.     local_tag_number = sizeof(mxf_local_tag_batch)/sizeof(*mxf_local_tag_batch);

  223. 

  224.     put_buffer(pb, primer_pack_key, 16);

  225.     klv_encode_ber_length(pb, local_tag_number * 18 + 8);

  226. 

  227.     put_be32(pb, local_tag_number); // local_tag num

  228.     put_be32(pb, 18); // item size, always 18 according to the specs

  229. 

  230.     for (i = 0; i < local_tag_number; i++) {

  231.         put_be16(pb, mxf_local_tag_batch[i].local_tag);

  232.         put_buffer(pb, mxf_local_tag_batch[i].uid, 16);

  233.     }

  234. }

  235. 

  236. static void mxf_write_local_tag(ByteIOContext *pb, int size, int tag)

  237. {

  238.     put_be16(pb, tag);

  239.     put_be16(pb, size);

  240. }

  241. 

  242. static void mxf_write_metadata_key(ByteIOContext *pb, unsigned int value)

  243. {

  244.     put_buffer(pb, header_metadata_key, 13);

  245.     put_be24(pb, value);

  246. }

  247. 

  248. static void mxf_free(AVFormatContext *s)

  249. {

  250.     int i;

  251. 

  252.     for (i = 0; i < s->nb_streams; i++) {

  253.         AVStream *st = s->streams[i];

  254.         av_freep(&st->priv_data);

  255.     }

  256. }

  257. 

  258. static const MXFDataDefinitionUL *mxf_get_data_definition_ul(enum CodecType type)

  259. {

  260.     const MXFDataDefinitionUL *uls = ff_mxf_data_definition_uls;

  261.     while (uls->type != CODEC_TYPE_DATA) {

  262.         if (type == uls->type)

  263.             break;

  264.         uls++;

  265.     }

  266.     return uls;

  267. }

  268. 

  269. static void mxf_write_essence_container_refs(AVFormatContext *s)

  270. {

  271.     MXFContext *c = s->priv_data;

  272.     ByteIOContext *pb = s->pb;

  273.     int i;

  274. 

  275.     mxf_write_refs_count(pb, c->essence_container_count);

  276.     av_log(s,AV_LOG_DEBUG, "essence container count:%d\n", c->essence_container_count);

  277.     for (i = 0; i < c->essence_container_count; i++) {

  278.         put_buffer(pb, mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul, 16);

  279.         PRINT_KEY(s, "essence container ul:\n", mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul);

  280.     }

  281. }

  282. 

  283. static void mxf_write_preface(AVFormatContext *s)

  284. {

  285.     MXFContext *mxf = s->priv_data;

  286.     ByteIOContext *pb = s->pb;

  287. 

  288.     mxf_write_metadata_key(pb, 0x012f00);

  289.     PRINT_KEY(s, "preface key", pb->buf_ptr - 16);

  290.     klv_encode_ber_length(pb, 130 + 16 * mxf->essence_container_count);

  291. 

  292.     // write preface set uid

  293.     mxf_write_local_tag(pb, 16, 0x3C0A);

  294.     mxf_write_uuid(pb, Preface, 0);

  295.     PRINT_KEY(s, "preface uid", pb->buf_ptr - 16);

  296. 

  297.     // write create date as unknown

  298.     mxf_write_local_tag(pb, 8, 0x3B02);

  299.     put_be64(pb, 0);

  300. 

  301.     // write version

  302.     mxf_write_local_tag(pb, 2, 0x3B05);

  303.     put_be16(pb, 1);

  304. 

  305.     // write identification_refs

  306.     mxf_write_local_tag(pb, 16 + 8, 0x3B06);

  307.     mxf_write_refs_count(pb, 1);

  308.     mxf_write_uuid(pb, Identification, 0);

  309. 

  310.     // write content_storage_refs

  311.     mxf_write_local_tag(pb, 16, 0x3B03);

  312.     mxf_write_uuid(pb, ContentStorage, 0);

  313. 

  314.     mxf_write_local_tag(pb, 16, 0x3B09);

  315.     put_buffer(pb, op1a_ul, 16);

  316. 

  317.     // write essence_container_refs

  318.     mxf_write_local_tag(pb, 8 + 16 * mxf->essence_container_count, 0x3B0A);

  319.     mxf_write_essence_container_refs(s);

  320. 

  321.     // write dm_scheme_refs

  322.     mxf_write_local_tag(pb, 8, 0x3B0B);

  323.     put_be64(pb, 0);

  324. }

  325. 

  326. /*

  327.  * Write a local tag containing an ascii string as utf-16

  328.  */

  329. static void mxf_write_local_tag_utf16(ByteIOContext *pb, int tag, const char *value)

  330. {

  331.     int i, size = strlen(value);

  332.     mxf_write_local_tag(pb, size*2, tag);

  333.     for (i = 0; i < size; i++)

  334.         put_be16(pb, value[i]);

  335. }

  336. 

  337. static void mxf_write_identification(AVFormatContext *s)

  338. {

  339.     ByteIOContext *pb = s->pb;

  340.     const char *company = "FFmpeg";

  341.     const char *product = "OP1a Muxer";

  342.     const char *version;

  343.     int length;

  344. 

  345.     mxf_write_metadata_key(pb, 0x013000);

  346.     PRINT_KEY(s, "identification key", pb->buf_ptr - 16);

  347. 

  348.     version = s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT ?

  349.         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);

  350.     length = 84 + (strlen(company)+strlen(product)+strlen(version))*2; // utf-16

  351.     klv_encode_ber_length(pb, length);

  352. 

  353.     // write uid

  354.     mxf_write_local_tag(pb, 16, 0x3C0A);

  355.     mxf_write_uuid(pb, Identification, 0);

  356.     PRINT_KEY(s, "identification uid", pb->buf_ptr - 16);

  357. 

  358.     // write generation uid

  359.     mxf_write_local_tag(pb, 16, 0x3C09);

  360.     mxf_write_uuid(pb, Identification, 1);

  361. 

  362.     mxf_write_local_tag_utf16(pb, 0x3C01, company); // Company Name

  363.     mxf_write_local_tag_utf16(pb, 0x3C02, product); // Product Name

  364.     mxf_write_local_tag_utf16(pb, 0x3C04, version); // Version String

  365. 

  366.     // write product uid

  367.     mxf_write_local_tag(pb, 16, 0x3C05);

  368.     mxf_write_uuid(pb, Identification, 2);

  369. 

  370.     // write modified date

  371.     mxf_write_local_tag(pb, 8, 0x3C06);

  372.     put_be64(pb, 0);

  373. }

  374. 

  375. static void mxf_write_content_storage(AVFormatContext *s)

  376. {

  377.     ByteIOContext *pb = s->pb;

  378. 

  379.     mxf_write_metadata_key(pb, 0x011800);

  380.     PRINT_KEY(s, "content storage key", pb->buf_ptr - 16);

  381.     klv_encode_ber_length(pb, 64);

  382. 

  383.     // write uid

  384.     mxf_write_local_tag(pb, 16, 0x3C0A);

  385.     mxf_write_uuid(pb, ContentStorage, 0);

  386.     PRINT_KEY(s, "content storage uid", pb->buf_ptr - 16);

  387. 

  388.     // write package reference

  389.     mxf_write_local_tag(pb, 16 * 2 + 8, 0x1901);

  390.     mxf_write_refs_count(pb, 2);

  391.     mxf_write_uuid(pb, MaterialPackage, 0);

  392.     mxf_write_uuid(pb, SourcePackage, 0);

  393. }

  394. 

  395. static void mxf_write_track(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)

  396. {

  397.     ByteIOContext *pb = s->pb;

  398.     MXFStreamContext *sc = st->priv_data;

  399. 

  400.     mxf_write_metadata_key(pb, 0x013b00);

  401.     PRINT_KEY(s, "track key", pb->buf_ptr - 16);

  402.     klv_encode_ber_length(pb, 80);

  403. 

  404.     // write track uid

  405.     mxf_write_local_tag(pb, 16, 0x3C0A);

  406.     mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, st->index);

  407.     PRINT_KEY(s, "track uid", pb->buf_ptr - 16);

  408. 

  409.     // write track id

  410.     mxf_write_local_tag(pb, 4, 0x4801);

  411.     put_be32(pb, st->index);

  412. 

  413.     // write track number

  414.     mxf_write_local_tag(pb, 4, 0x4804);

  415.     if (type == MaterialPackage)

  416.         put_be32(pb, 0); // track number of material package is 0

  417.     else

  418.         put_buffer(pb, sc->track_essence_element_key + 12, 4);

  419. 

  420.     mxf_write_local_tag(pb, 8, 0x4B01);

  421.     put_be32(pb, st->time_base.den);

  422.     put_be32(pb, st->time_base.num);

  423. 

  424.     // write origin

  425.     mxf_write_local_tag(pb, 8, 0x4B02);

  426.     put_be64(pb, 0);

  427. 

  428.     // write sequence refs

  429.     mxf_write_local_tag(pb, 16, 0x4803);

  430.     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);

  431. }

  432. 

  433. static void mxf_write_common_fields(ByteIOContext *pb, AVStream *st)

  434. {

  435.     const MXFDataDefinitionUL *data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);

  436.     MXFStreamContext *sc = st->priv_data;

  437. 

  438.     // find data define uls

  439.     mxf_write_local_tag(pb, 16, 0x0201);

  440.     put_buffer(pb, data_def_ul->uid, 16);

  441. 

  442.     // write duration

  443.     mxf_write_local_tag(pb, 8, 0x0202);

  444.     put_be64(pb, sc->duration);

  445. }

  446. 

  447. static void mxf_write_sequence(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)

  448. {

  449.     ByteIOContext *pb = s->pb;

  450. 

  451.     mxf_write_metadata_key(pb, 0x010f00);

  452.     PRINT_KEY(s, "sequence key", pb->buf_ptr - 16);

  453.     klv_encode_ber_length(pb, 80);

  454. 

  455.     mxf_write_local_tag(pb, 16, 0x3C0A);

  456.     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);

  457. 

  458.     PRINT_KEY(s, "sequence uid", pb->buf_ptr - 16);

  459.     mxf_write_common_fields(pb, st);

  460. 

  461.     // write structural component

  462.     mxf_write_local_tag(pb, 16 + 8, 0x1001);

  463.     mxf_write_refs_count(pb, 1);

  464.     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);

  465. }

  466. 

  467. static void mxf_write_structural_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)

  468. {

  469.     ByteIOContext *pb = s->pb;

  470.     int i;

  471. 

  472.     mxf_write_metadata_key(pb, 0x011100);

  473.     PRINT_KEY(s, "sturctural component key", pb->buf_ptr - 16);

  474.     klv_encode_ber_length(pb, 108);

  475. 

  476.     // write uid

  477.     mxf_write_local_tag(pb, 16, 0x3C0A);

  478.     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);

  479. 

  480.     PRINT_KEY(s, "structural component uid", pb->buf_ptr - 16);

  481.     mxf_write_common_fields(pb, st);

  482. 

  483.     // write start_position

  484.     mxf_write_local_tag(pb, 8, 0x1201);

  485.     put_be64(pb, 0);

  486. 

  487.     // write source package uid, end of the reference

  488.     mxf_write_local_tag(pb, 32, 0x1101);

  489.     if (type == SourcePackage) {

  490.         for (i = 0; i < 4; i++)

  491.             put_be64(pb, 0);

  492.     } else

  493.         mxf_write_umid(pb, SourcePackage, 0);

  494. 

  495.     // write source track id

  496.     mxf_write_local_tag(pb, 4, 0x1102);

  497.     if (type == SourcePackage)

  498.         put_be32(pb, 0);

  499.     else

  500.         put_be32(pb, st->index);

  501. }

  502. 

  503. static void mxf_write_multi_descriptor(AVFormatContext *s)

  504. {

  505.     ByteIOContext *pb = s->pb;

  506.     int i;

  507. 

  508.     mxf_write_metadata_key(pb, 0x014400);

  509.     PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);

  510.     klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);

  511. 

  512.     mxf_write_local_tag(pb, 16, 0x3C0A);

  513.     mxf_write_uuid(pb, MultipleDescriptor, 0);

  514.     PRINT_KEY(s, "multi_desc uid", pb->buf_ptr - 16);

  515. 

  516.     // write sample rate

  517.     mxf_write_local_tag(pb, 8, 0x3001);

  518.     put_be32(pb, s->streams[0]->time_base.den);

  519.     put_be32(pb, s->streams[0]->time_base.num);

  520. 

  521.     // write essence container ul

  522.     mxf_write_local_tag(pb, 16, 0x3004);

  523.     put_buffer(pb, multiple_desc_ul, 16);

  524. 

  525.     // write sub descriptor refs

  526.     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x3F01);

  527.     mxf_write_refs_count(pb, s->nb_streams);

  528.     for (i = 0; i < s->nb_streams; i++)

  529.         mxf_write_uuid(pb, SubDescriptor, i);

  530. }

  531. 

  532. static void mxf_write_generic_desc(ByteIOContext *pb, AVStream *st, const UID key)

  533. {

  534.     MXFStreamContext *sc = st->priv_data;

  535. 

  536.     put_buffer(pb, key, 16);

  537.     klv_encode_ber_length(pb, 108);

  538. 

  539.     mxf_write_local_tag(pb, 16, 0x3C0A);

  540.     mxf_write_uuid(pb, SubDescriptor, st->index);

  541. 

  542.     mxf_write_local_tag(pb, 4, 0x3006);

  543.     put_be32(pb, st->index);

  544. 

  545.     mxf_write_local_tag(pb, 8, 0x3001);

  546.     put_be32(pb, st->time_base.den);

  547.     put_be32(pb, st->time_base.num);

  548. 

  549.     mxf_write_local_tag(pb, 16, 0x3004);

  550.     put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);

  551. 

  552.     mxf_write_local_tag(pb, 16, 0x3201);

  553.     put_buffer(pb, *sc->codec_ul, 16);

  554. }

  555. 

  556. static const UID mxf_mpegvideo_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 };

  557. static const UID mxf_wav_descriptor_key       = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 };

  558. 

  559. static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)

  560. {

  561.     ByteIOContext *pb = s->pb;

  562. 

  563.     mxf_write_generic_desc(pb, st, mxf_mpegvideo_descriptor_key);

  564. 

  565.     mxf_write_local_tag(pb, 4, 0x3203);

  566.     put_be32(pb, st->codec->width);

  567. 

  568.     mxf_write_local_tag(pb, 4, 0x3202);

  569.     put_be32(pb, st->codec->height);

  570. 

  571.     mxf_write_local_tag(pb, 8, 0x320E);

  572.     put_be32(pb, st->codec->height * st->sample_aspect_ratio.den);

  573.     put_be32(pb, st->codec->width  * st->sample_aspect_ratio.num);

  574. }

  575. 

  576. static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)

  577. {

  578.     ByteIOContext *pb = s->pb;

  579. 

  580.     mxf_write_generic_desc(pb, st, mxf_wav_descriptor_key);

  581. 

  582.     // write audio sampling rate

  583.     mxf_write_local_tag(pb, 8, 0x3D03);

  584.     put_be32(pb, st->codec->sample_rate);

  585.     put_be32(pb, 1);

  586. 

  587.     mxf_write_local_tag(pb, 4, 0x3D07);

  588.     put_be32(pb, st->codec->channels);

  589. 

  590.     mxf_write_local_tag(pb, 4, 0x3D01);

  591.     put_be32(pb, st->codec->bits_per_coded_sample);

  592. }

  593. 

  594. static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)

  595. {

  596.     ByteIOContext *pb = s->pb;

  597.     int i;

  598. 

  599.     if (type == MaterialPackage) {

  600.         mxf_write_metadata_key(pb, 0x013600);

  601.         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);

  602.         klv_encode_ber_length(pb, 92 + 16 * s->nb_streams);

  603.     } else {

  604.         mxf_write_metadata_key(pb, 0x013700);

  605.         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);

  606.         klv_encode_ber_length(pb, 112 + 16 * s->nb_streams); // 20 bytes length for descriptor reference

  607.     }

  608. 

  609.     // write uid

  610.     mxf_write_local_tag(pb, 16, 0x3C0A);

  611.     mxf_write_uuid(pb, type, 0);

  612.     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);

  613.     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);

  614. 

  615.     // write package umid

  616.     mxf_write_local_tag(pb, 32, 0x4401);

  617.     mxf_write_umid(pb, type, 0);

  618.     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);

  619. 

  620.     // write create date

  621.     mxf_write_local_tag(pb, 8, 0x4405);

  622.     put_be64(pb, 0);

  623. 

  624.     // write modified date

  625.     mxf_write_local_tag(pb, 8, 0x4404);

  626.     put_be64(pb, 0);

  627. 

  628.     // write track refs

  629.     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x4403);

  630.     mxf_write_refs_count(pb, s->nb_streams);

  631.     for (i = 0; i < s->nb_streams; i++)

  632.         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);

  633. 

  634.     // write multiple descriptor reference

  635.     if (type == SourcePackage) {

  636.         mxf_write_local_tag(pb, 16, 0x4701);

  637.         if (s->nb_streams > 1) {

  638.             mxf_write_uuid(pb, MultipleDescriptor, 0);

  639.             mxf_write_multi_descriptor(s);

  640.         } else

  641.             mxf_write_uuid(pb, SubDescriptor, 0);

  642.     }

  643. 

  644.     for (i = 0; i < s->nb_streams; i++) {

  645.         AVStream *st = s->streams[i];

  646.         mxf_write_track(s, st, type);

  647.         mxf_write_sequence(s, st, type);

  648.         mxf_write_structural_component(s, st, type);

  649. 

  650.         if (type == SourcePackage) {

  651.             MXFStreamContext *sc = st->priv_data;

  652.             mxf_essence_container_uls[sc->index].write_desc(s, st);

  653.         }

  654.     }

  655. }

  656. 

  657. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  658. {

  659.     mxf_write_preface(s);

  660.     mxf_write_identification(s);

  661.     mxf_write_content_storage(s);

  662.     mxf_write_package(s, MaterialPackage);

  663.     mxf_write_package(s, SourcePackage);

  664.     return 0;

  665. }

  666. 

  667. static void mxf_write_partition(AVFormatContext *s, int bodysid, const uint8_t *key, int write_metadata)

  668. {

  669.     MXFContext *mxf = s->priv_data;

  670.     ByteIOContext *pb = s->pb;

  671.     int64_t header_byte_count_offset;

  672. 

  673.     // write klv

  674.     put_buffer(pb, key, 16);

  675. 

  676.     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);

  677. 

  678.     // write partition value

  679.     put_be16(pb, 1); // majorVersion

  680.     put_be16(pb, 2); // minorVersion

  681.     put_be32(pb, 1); // kagSize

  682. 

  683.     put_be64(pb, url_ftell(pb) - 25); // thisPartition

  684.     put_be64(pb, 0); // previousPartition

  685. 

  686.     put_be64(pb, mxf->footer_partition_offset); // footerPartition

  687. 

  688.     // set offset

  689.     header_byte_count_offset = url_ftell(pb);

  690.     put_be64(pb, 0); // headerByteCount, update later

  691. 

  692.     // no indexTable

  693.     put_be64(pb, 0); // indexByteCount

  694.     put_be32(pb, 0); // indexSID

  695.     put_be64(pb, 0); // bodyOffset

  696. 

  697.     put_be32(pb, bodysid); // bodySID

  698.     put_buffer(pb, op1a_ul, 16); // operational pattern

  699. 

  700.     // essence container

  701.     mxf_write_essence_container_refs(s);

  702. 

  703.     if (write_metadata) {

  704.         // mark the start of the headermetadata and calculate metadata size

  705.         int64_t pos, start = url_ftell(s->pb);

  706.         mxf_write_primer_pack(s);

  707.         mxf_write_header_metadata_sets(s);

  708.         pos = url_ftell(s->pb);

  709.         // update header_byte_count

  710.         url_fseek(pb, header_byte_count_offset, SEEK_SET);

  711.         put_be64(pb, pos - start);

  712.         url_fseek(pb, pos, SEEK_SET);

  713.     }

  714. 

  715.     put_flush_packet(pb);

  716. }

  717. 

  718. static const UID mxf_mpeg2_codec_uls[] = {

  719.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame

  720.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP

  721.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame

  722.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP

  723.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame

  724.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP

  725.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame

  726.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP

  727. };

  728. 

  729. static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)

  730. {

  731.     if (avctx->profile == 4) { // Main

  732.         if (avctx->level == 8) // Main

  733.             return avctx->gop_size ?

  734.                 &mxf_mpeg2_codec_uls[1] :

  735.                 &mxf_mpeg2_codec_uls[0];

  736.         else if (avctx->level == 4) // High

  737.             return avctx->gop_size ?

  738.                 &mxf_mpeg2_codec_uls[5] :

  739.                 &mxf_mpeg2_codec_uls[4];

  740.     } else if (avctx->profile == 0) { // 422

  741.         if (avctx->level == 5) // Main

  742.             return avctx->gop_size ?

  743.                 &mxf_mpeg2_codec_uls[3] :

  744.                 &mxf_mpeg2_codec_uls[2];

  745.         else if (avctx->level == 2) // High

  746.             return avctx->gop_size ?

  747.                 &mxf_mpeg2_codec_uls[7] :

  748.                 &mxf_mpeg2_codec_uls[6];

  749.     }

  750.     return NULL;

  751. }

  752. 

  753. static int mxf_write_header(AVFormatContext *s)

  754. {

  755.     MXFContext *mxf = s->priv_data;

  756.     int i;

  757.     uint8_t present[sizeof(mxf_essence_container_uls)/

  758.                     sizeof(*mxf_essence_container_uls)] = {0};

  759. 

  760.     for (i = 0; i < s->nb_streams; i++) {

  761.         AVStream *st = s->streams[i];

  762.         MXFStreamContext *sc = av_mallocz(sizeof(*sc));

  763.         if (!sc)

  764.             return AVERROR(ENOMEM);

  765.         st->priv_data = sc;

  766.         // set pts information

  767.         if (st->codec->codec_type == CODEC_TYPE_VIDEO)

  768.             av_set_pts_info(st, 64, 1, st->codec->time_base.den);

  769.         else if (st->codec->codec_type == CODEC_TYPE_AUDIO)

  770.             av_set_pts_info(st, 64, 1, st->codec->sample_rate);

  771.         sc->duration = -1;

  772. 

  773.         sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);

  774.         if (sc->index == -1) {

  775.             av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "

  776.                    "codec not currently supported in container\n", i);

  777.             return -1;

  778.         }

  779. 

  780.         if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {

  781.             if (st->codec->profile == FF_PROFILE_UNKNOWN ||

  782.                 st->codec->level == FF_LEVEL_UNKNOWN) {

  783.                 av_log(s, AV_LOG_ERROR, "track %d: profile and level must be set for mpeg-2\n", i);

  784.                 return -1;

  785.             }

  786.             sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);

  787.             if (!sc->codec_ul) {

  788.                 av_log(s, AV_LOG_ERROR, "track %d: could not find codec ul for mpeg-2, "

  789.                        "unsupported profile/level\n", i);

  790.                 return -1;

  791.             }

  792.         } else

  793.             sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;

  794. 

  795.         if (!present[sc->index]) {

  796.             mxf->essence_containers_indices[mxf->essence_container_count++] = sc->index;

  797.             present[sc->index] = 1;

  798.         } else

  799.             present[sc->index]++;

  800.         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);

  801.         sc->track_essence_element_key[15] = present[sc->index];

  802.         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);

  803.     }

  804. 

  805.     mxf_write_partition(s, 1, header_open_partition_key, 1);

  806. 

  807.     return 0;

  808. }

  809. 

  810. static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)

  811. {

  812.     ByteIOContext *pb = s->pb;

  813.     AVStream *st = s->streams[pkt->stream_index];

  814.     MXFStreamContext *sc = st->priv_data;

  815. 

  816.     put_buffer(pb, sc->track_essence_element_key, 16); // write key

  817.     klv_encode_ber_length(pb, pkt->size); // write length

  818.     put_buffer(pb, pkt->data, pkt->size); // write value

  819. 

  820.     sc->duration = FFMAX(pkt->pts + pkt->duration, sc->duration);

  821. 

  822.     put_flush_packet(pb);

  823.     return 0;

  824. }

  825. 

  826. static int mxf_write_footer(AVFormatContext *s)

  827. {

  828.     MXFContext *mxf = s->priv_data;

  829.     ByteIOContext *pb = s->pb;

  830. 

  831.     mxf->footer_partition_offset = url_ftell(pb);

  832.     mxf_write_partition(s, 0, footer_partition_key, 0);

  833.     if (!url_is_streamed(s->pb)) {

  834.         url_fseek(pb, 0, SEEK_SET);

  835.         mxf_write_partition(s, 1, header_closed_partition_key, 1);

  836.     }

  837.     mxf_free(s);

  838.     return 0;

  839. }

  840. 

  841. AVOutputFormat mxf_muxer = {

  842.     "mxf",

  843.     NULL_IF_CONFIG_SMALL("Material eXchange Format"),

  844.     NULL,

  845.     "mxf",

  846.     sizeof(MXFContext),

  847.     CODEC_ID_PCM_S16LE,

  848.     CODEC_ID_MPEG2VIDEO,

  849.     mxf_write_header,

  850.     mxf_write_packet,

  851.     mxf_write_footer,

  852. };

  853.