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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.     const UID *essence_container_ul;

  44. } MXFStreamContext;

  45. 

  46. typedef struct {

  47.     UID container_ul;

  48.     UID element_ul;

  49.     enum CodecID id;

  50. } MXFContainerEssencePair;

  51. 

  52. static const MXFContainerEssencePair mxf_essence_container_uls[] = {

  53.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },

  54.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 }, CODEC_ID_MPEG2VIDEO },

  55.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },

  56.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 }, CODEC_ID_PCM_S16LE },

  57.     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  58.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, CODEC_ID_NONE },

  59. };

  60. 

  61. typedef struct MXFContext {

  62.     int64_t header_byte_count;

  63.     int64_t header_byte_count_offset;

  64.     int64_t header_footer_partition_offset;

  65.     int essence_container_count;

  66.     uint8_t essence_containers_indices[sizeof(mxf_essence_container_uls)/

  67.                                        sizeof(*mxf_essence_container_uls)];

  68. } MXFContext;

  69. 

  70. typedef struct {

  71.     const UID key;

  72.     void (*write)();

  73.     enum CodecType type;

  74. } MXFDescriptorWriteTableEntry;

  75. 

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

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

  78. 

  79. /**

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

  81.  */

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

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

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

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

  86. 

  87. /**

  88.  * partial key for header metadata

  89.  */

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

  91. 

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

  93. 

  94. /**

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

  96.  */

  97. static const MXFLocalTagPair mxf_local_tag_batch[] = {

  98.     // preface set

  99.     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */

  100.     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */

  101.     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */

  102.     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */

  103.     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */

  104.     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */

  105.     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */

  106.     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */

  107.     // Identification

  108.     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */

  109.     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */

  110.     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */

  111.     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */

  112.     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */

  113.     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */

  114.     // Content Storage

  115.     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */

  116.     // Essence Container Data

  117.     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */

  118.     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */

  119.     // Package

  120.     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */

  121.     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */

  122.     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */

  123.     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */

  124.     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */

  125.     // Track

  126.     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */

  127.     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */

  128.     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */

  129.     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */

  130.     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */

  131.     // Sequence

  132.     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */

  133.     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */

  134.     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */

  135.     // Source Clip

  136.     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Start position */

  137.     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */

  138.     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */

  139.     // File Descriptor

  140.     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */

  141.     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */

  142.     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */

  143.     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */

  144.     // Generic Picture Essence Descriptor

  145.     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */

  146.     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */

  147.     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */

  148.     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */

  149.     // Generic Sound Essence Descriptor

  150.     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */

  151.     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */

  152.     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */

  153.     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */

  154. };

  155. 

  156. static void mxf_write_uuid(ByteIOContext *pb, enum CodecID type, int value)

  157. {

  158.     put_buffer(pb, uuid_base, 12);

  159.     put_be16(pb, type);

  160.     put_be16(pb, value);

  161. }

  162. 

  163. static void mxf_write_umid(ByteIOContext *pb, enum CodecID type, int value)

  164. {

  165.     put_buffer(pb, umid_base, 16);

  166.     mxf_write_uuid(pb, type, value);

  167. }

  168. 

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

  170. {

  171.     put_be32(pb, ref_count);

  172.     put_be32(pb, 16);

  173. }

  174. 

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

  176. {

  177.     // Determine the best BER size

  178.     int size;

  179.     if (len < 128) {

  180.         //short form

  181.         put_byte(pb, len);

  182.         return 1;

  183.     }

  184. 

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

  186. 

  187.     // long form

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

  189.     while(size) {

  190.         size --;

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

  192.     }

  193.     return 0;

  194. }

  195. 

  196. /*

  197.  * Get essence container ul and return its index position

  198.  */

  199. static const UID *mxf_get_essence_container_ul(enum CodecID type, int *index)

  200. {

  201.     const MXFContainerEssencePair *uls = mxf_essence_container_uls;

  202.     for (*index = 0; *index < sizeof(mxf_essence_container_uls)/

  203.                               sizeof(*mxf_essence_container_uls); (*index)++)

  204.         if (mxf_essence_container_uls[*index].id == type)

  205.             return &uls->container_ul;

  206.     *index = -1;

  207.     return NULL;

  208. }

  209. 

  210. static void mxf_write_primer_pack(AVFormatContext *s)

  211. {

  212.     ByteIOContext *pb = s->pb;

  213.     int local_tag_number, i = 0;

  214. 

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

  216. 

  217.     put_buffer(pb, primer_pack_key, 16);

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

  219. 

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

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

  222. 

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

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

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

  226.     }

  227. }

  228. 

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

  230. {

  231.     put_be16(pb, tag);

  232.     put_be16(pb, size);

  233. }

  234. 

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

  236. {

  237.     put_buffer(pb, header_metadata_key, 13);

  238.     put_be24(pb, value);

  239. }

  240. 

  241. static void mxf_free(AVFormatContext *s)

  242. {

  243.     int i;

  244. 

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

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

  247.         av_freep(&st->priv_data);

  248.     }

  249. }

  250. 

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

  252. {

  253.     const MXFDataDefinitionUL *uls = ff_mxf_data_definition_uls;

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

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

  256.             break;

  257.         uls++;

  258.     }

  259.     return uls;

  260. }

  261. 

  262. static void mxf_write_essence_container_refs(AVFormatContext *s)

  263. {

  264.     MXFContext *c = s->priv_data;

  265.     ByteIOContext *pb = s->pb;

  266.     int i;

  267. 

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

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

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

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

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

  273.     }

  274. }

  275. 

  276. static void mxf_write_preface(AVFormatContext *s)

  277. {

  278.     MXFContext *mxf = s->priv_data;

  279.     ByteIOContext *pb = s->pb;

  280. 

  281.     mxf_write_metadata_key(pb, 0x012f00);

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

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

  284. 

  285.     // write preface set uid

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

  287.     mxf_write_uuid(pb, Preface, 0);

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

  289. 

  290.     // write create date as unknown

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

  292.     put_be64(pb, 0);

  293. 

  294.     // write version

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

  296.     put_be16(pb, 1);

  297. 

  298.     // write identification_refs

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

  300.     mxf_write_refs_count(pb, 1);

  301.     mxf_write_uuid(pb, Identification, 0);

  302. 

  303.     // write content_storage_refs

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

  305.     mxf_write_uuid(pb, ContentStorage, 0);

  306. 

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

  308.     put_buffer(pb, op1a_ul, 16);

  309. 

  310.     // write essence_container_refs

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

  312.     mxf_write_essence_container_refs(s);

  313. 

  314.     // write dm_scheme_refs

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

  316.     put_be64(pb, 0);

  317. }

  318. 

  319. /*

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

  321.  */

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

  323. {

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

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

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

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

  328. }

  329. 

  330. static void mxf_write_identification(AVFormatContext *s)

  331. {

  332.     ByteIOContext *pb = s->pb;

  333.     const char *company = "FFmpeg";

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

  335.     const char *version;

  336.     int length;

  337. 

  338.     mxf_write_metadata_key(pb, 0x013000);

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

  340. 

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

  342.         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);

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

  344.     klv_encode_ber_length(pb, length);

  345. 

  346.     // write uid

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

  348.     mxf_write_uuid(pb, Identification, 0);

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

  350. 

  351.     // write generation uid

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

  353.     mxf_write_uuid(pb, Identification, 1);

  354. 

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

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

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

  358. 

  359.     // write product uid

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

  361.     mxf_write_uuid(pb, Identification, 2);

  362. 

  363.     // write modified date

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

  365.     put_be64(pb, 0);

  366. }

  367. 

  368. static void mxf_write_content_storage(AVFormatContext *s)

  369. {

  370.     ByteIOContext *pb = s->pb;

  371. 

  372.     mxf_write_metadata_key(pb, 0x011800);

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

  374.     klv_encode_ber_length(pb, 64);

  375. 

  376.     // write uid

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

  378.     mxf_write_uuid(pb, ContentStorage, 0);

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

  380. 

  381.     // write package reference

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

  383.     mxf_write_refs_count(pb, 2);

  384.     mxf_write_uuid(pb, MaterialPackage, 0);

  385.     mxf_write_uuid(pb, SourcePackage, 0);

  386. }

  387. 

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

  389. {

  390.     ByteIOContext *pb = s->pb;

  391.     int i;

  392. 

  393.     if (type == MaterialPackage) {

  394.         mxf_write_metadata_key(pb, 0x013600);

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

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

  397.     } else {

  398.         mxf_write_metadata_key(pb, 0x013700);

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

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

  401.     }

  402. 

  403.     // write uid

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

  405.     mxf_write_uuid(pb, type, 0);

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

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

  408. 

  409.     // write package umid

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

  411.     mxf_write_umid(pb, type, 0);

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

  413. 

  414.     // write create date

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

  416.     put_be64(pb, 0);

  417. 

  418.     // write modified date

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

  420.     put_be64(pb, 0);

  421. 

  422.     // write track refs

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

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

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

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

  427. 

  428.     // write multiple descriptor reference

  429.     if (type == SourcePackage) {

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

  431.         mxf_write_uuid(pb, MultipleDescriptor, 0);

  432.     }

  433. }

  434. 

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

  436. {

  437.     ByteIOContext *pb = s->pb;

  438.     MXFStreamContext *sc = st->priv_data;

  439. 

  440.     mxf_write_metadata_key(pb, 0x013b00);

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

  442.     klv_encode_ber_length(pb, 80);

  443. 

  444.     // write track uid

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

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

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

  448. 

  449.     // write track id

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

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

  452. 

  453.     // write track number

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

  455.     if (type == MaterialPackage)

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

  457.     else

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

  459. 

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

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

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

  463. 

  464.     // write origin

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

  466.     put_be64(pb, 0);

  467. 

  468.     // write sequence refs

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

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

  471. }

  472. 

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

  474. {

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

  476.     // find data define uls

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

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

  479. 

  480.     // write duration

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

  482.     put_be64(pb, st->duration);

  483. }

  484. 

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

  486. {

  487.     ByteIOContext *pb = s->pb;

  488. 

  489.     mxf_write_metadata_key(pb, 0x010f00);

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

  491.     klv_encode_ber_length(pb, 80);

  492. 

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

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

  495. 

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

  497.     mxf_write_common_fields(pb, st);

  498. 

  499.     // write structural component

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

  501.     mxf_write_refs_count(pb, 1);

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

  503. }

  504. 

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

  506. {

  507.     ByteIOContext *pb = s->pb;

  508.     int i;

  509. 

  510.     mxf_write_metadata_key(pb, 0x011100);

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

  512.     klv_encode_ber_length(pb, 108);

  513. 

  514.     // write uid

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

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

  517. 

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

  519.     mxf_write_common_fields(pb, st);

  520. 

  521.     // write start_position

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

  523.     put_be64(pb, 0);

  524. 

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

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

  527.     if (type == SourcePackage) {

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

  529.             put_be64(pb, 0);

  530.     } else

  531.         mxf_write_umid(pb, SourcePackage, 0);

  532. 

  533.     // write source track id

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

  535.     if (type == SourcePackage)

  536.         put_be32(pb, 0);

  537.     else

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

  539. }

  540. 

  541. static void mxf_write_multi_descriptor(AVFormatContext *s)

  542. {

  543.     ByteIOContext *pb = s->pb;

  544.     int i;

  545. 

  546.     mxf_write_metadata_key(pb, 0x014400);

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

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

  549. 

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

  551.     mxf_write_uuid(pb, MultipleDescriptor, 0);

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

  553. 

  554.     // write sample rate

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

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

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

  558. 

  559.     // write essence container ul

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

  561.     put_buffer(pb, multiple_desc_ul, 16);

  562. 

  563.     // write sub descriptor refs

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

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

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

  567.         mxf_write_uuid(pb, SubDescriptor, i);

  568. }

  569. 

  570. static void mxf_write_generic_desc(ByteIOContext *pb, const MXFDescriptorWriteTableEntry *desc_tbl, AVStream *st)

  571. {

  572.     MXFStreamContext *sc = st->priv_data;

  573. 

  574.     put_buffer(pb, desc_tbl->key, 16);

  575.     klv_encode_ber_length(pb, 108);

  576. 

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

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

  579. 

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

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

  582. 

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

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

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

  586. 

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

  588.     put_buffer(pb, *sc->essence_container_ul, 16);

  589. }

  590. 

  591. static void mxf_write_mpegvideo_desc(AVFormatContext *s, const MXFDescriptorWriteTableEntry *desc_tbl, AVStream *st)

  592. {

  593.     ByteIOContext *pb = s->pb;

  594. 

  595.     mxf_write_generic_desc(pb, desc_tbl, st);

  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, st->codec->height);

  602. 

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

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

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

  606. 

  607.     // tmp write, will modified later

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

  609.     put_buffer(pb, ff_mxf_codec_uls->uid, 16);

  610. }

  611. 

  612. static void mxf_write_wav_desc(AVFormatContext *s, const MXFDescriptorWriteTableEntry *desc_tbl, AVStream *st)

  613. {

  614.     ByteIOContext *pb = s->pb;

  615. 

  616.     mxf_write_generic_desc(pb, desc_tbl, st);

  617. 

  618.     // write audio sampling rate

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

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

  621.     put_be32(pb, 1);

  622. 

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

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

  625. 

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

  627.     put_be32(pb, st->codec->bits_per_sample);

  628. 

  629.     // tmp write, will modified later

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

  631.     put_buffer(pb, (ff_mxf_codec_uls + 8)->uid, 16);

  632. }

  633. 

  634. static const MXFDescriptorWriteTableEntry mxf_descriptor_write_table[] = {

  635.     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_write_mpegvideo_desc, CODEC_ID_MPEG2VIDEO},

  636.     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_write_wav_desc, CODEC_ID_PCM_S16LE},

  637.     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, CODEC_ID_NONE},

  638. };

  639. 

  640. static void mxf_build_structural_metadata(AVFormatContext *s, enum MXFMetadataSetType type)

  641. {

  642.     int i;

  643.     const MXFDescriptorWriteTableEntry *desc = NULL;

  644. 

  645.     mxf_write_package(s, type);

  646.     if (type == SourcePackage)

  647.         mxf_write_multi_descriptor(s);

  648. 

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

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

  651.         mxf_write_track(s, st, type);

  652.         mxf_write_sequence(s, st, type);

  653.         mxf_write_structural_component(s, st, type);

  654. 

  655.         if (type == SourcePackage) {

  656.             for (desc = mxf_descriptor_write_table; desc->write; desc++) {

  657.                 if (s->streams[i]->codec->codec_id == desc->type) {

  658.                     desc->write(s, desc, st);

  659.                     break;

  660.                 }

  661.             }

  662.         }

  663.     }

  664. }

  665. 

  666. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  667. {

  668.     mxf_write_preface(s);

  669.     mxf_write_identification(s);

  670.     mxf_write_content_storage(s);

  671.     mxf_build_structural_metadata(s, MaterialPackage);

  672.     mxf_build_structural_metadata(s, SourcePackage);

  673.     return 0;

  674. }

  675. 

  676. static void mxf_write_partition(AVFormatContext *s, int64_t byte_position, int bodysid, const uint8_t *key)

  677. {

  678.     MXFContext *mxf = s->priv_data;

  679.     ByteIOContext *pb = s->pb;

  680. 

  681.     // write klv

  682.     put_buffer(pb, key, 16);

  683. 

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

  685. 

  686.     // write partition value

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

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

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

  690. 

  691.     put_be64(pb, byte_position); // thisPartition

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

  693. 

  694.     // set offset

  695.     if (!byte_position)

  696.         mxf->header_footer_partition_offset = url_ftell(pb);

  697.     put_be64(pb, byte_position); // footerPartition,update later

  698. 

  699.     // set offset

  700.     if (!byte_position)

  701.         mxf->header_byte_count_offset = url_ftell(pb);

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

  703. 

  704.     // no indexTable

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

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

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

  708. 

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

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

  711. 

  712.     // essence container

  713.     mxf_write_essence_container_refs(s);

  714. }

  715. 

  716. static int mux_write_header(AVFormatContext *s)

  717. {

  718.     MXFContext *mxf = s->priv_data;

  719.     ByteIOContext *pb = s->pb;

  720.     int64_t header_metadata_start, offset_now;

  721.     int i, index;

  722.     uint8_t present[sizeof(mxf_essence_container_uls)/

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

  724. 

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

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

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

  728.         if (!sc)

  729.             return AVERROR(ENOMEM);

  730.         st->priv_data = sc;

  731.         // set pts information

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

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

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

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

  736.         sc->essence_container_ul = mxf_get_essence_container_ul(st->codec->codec_id, &index);

  737.         if (!sc->essence_container_ul) {

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

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

  740.             return -1;

  741.         }

  742.         if (!present[index]) {

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

  744.             present[index] = 1;

  745.         } else

  746.             present[index]++;

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

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

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

  750.     }

  751. 

  752.     mxf_write_partition(s, 0, 1, header_partition_key);

  753. 

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

  755.     header_metadata_start = url_ftell(s->pb);

  756.     mxf_write_primer_pack(s);

  757.     if (mxf_write_header_metadata_sets(s) < 0)

  758.         goto fail;

  759.     offset_now = url_ftell(s->pb);

  760.     mxf->header_byte_count = offset_now - header_metadata_start;

  761.     // update header_byte_count

  762.     url_fseek(pb, mxf->header_byte_count_offset, SEEK_SET);

  763.     put_be64(pb, mxf->header_byte_count);

  764.     url_fseek(pb, offset_now, SEEK_SET);

  765. 

  766.     put_flush_packet(pb);

  767.     return 0;

  768. fail:

  769.     mxf_free(s);

  770.     return -1;

  771. }

  772. 

  773. static int mux_write_packet(AVFormatContext *s, AVPacket *pkt)

  774. {

  775.     ByteIOContext *pb = s->pb;

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

  777.     MXFStreamContext *sc = st->priv_data;

  778. 

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

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

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

  782. 

  783.     put_flush_packet(pb);

  784.     return 0;

  785. }

  786. 

  787. static void mxf_update_header_partition(AVFormatContext *s, int64_t footer_partition_offset)

  788. {

  789.     MXFContext *mxf = s->priv_data;

  790.     ByteIOContext *pb = s->pb;

  791. 

  792.     url_fseek(pb, mxf->header_footer_partition_offset, SEEK_SET);

  793.     put_be64(pb, footer_partition_offset);

  794.     put_flush_packet(pb);

  795. }

  796. 

  797. 

  798. static int mux_write_footer(AVFormatContext *s)

  799. {

  800.     ByteIOContext *pb = s->pb;

  801.     int64_t byte_position= url_ftell(pb);

  802. 

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

  804.         mxf_write_partition(s, byte_position, 0, footer_partition_key);

  805.         put_flush_packet(pb);

  806.         mxf_update_header_partition(s, byte_position);

  807.     }

  808.     mxf_free(s);

  809.     return 0;

  810. }

  811. 

  812. AVOutputFormat mxf_muxer = {

  813.     "mxf",

  814.     NULL_IF_CONFIG_SMALL("Material eXchange Format"),

  815.     NULL,

  816.     "mxf",

  817.     sizeof(MXFContext),

  818.     CODEC_ID_PCM_S16LE,

  819.     CODEC_ID_MPEG2VIDEO,

  820.     mux_write_header,

  821.     mux_write_packet,

  822.     mux_write_footer,

  823. };

  824.