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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. } MXFStreamContext;

  44. 

  45. typedef struct MXFContext {

  46.     int64_t header_byte_count;

  47.     int64_t header_byte_count_offset;

  48.     int64_t header_footer_partition_offset;

  49.     int essence_container_count;

  50. } MXFContext;

  51. 

  52. typedef struct {

  53.     const UID key;

  54.     void (*write)();

  55.     enum CodecType type;

  56. } MXFDescriptorWriteTableEntry;

  57. 

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

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

  60. 

  61. /**

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

  63.  */

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

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

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

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

  68. 

  69. /**

  70.  * partial key for header metadata

  71.  */

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

  73. 

  74. static const MXFCodecUL mxf_essence_element_key[] = {

  75.     { { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 }, 14, CODEC_ID_MPEG2VIDEO},

  76.     { { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE},

  77.     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE},

  78. };

  79. 

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

  81. 

  82. /**

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

  84.  */

  85. static const MXFLocalTagPair mxf_local_tag_batch[] = {

  86.     // preface set

  87.     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */

  88.     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */

  89.     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */

  90.     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */

  91.     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */

  92.     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */

  93.     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */

  94.     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */

  95.     // Identification

  96.     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */

  97.     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */

  98.     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */

  99.     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x04,0x00,0x00,0x00}}, /* Version String */

  100.     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */

  101.     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */

  102.     // Content Storage

  103.     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */

  104.     // Essence Container Data

  105.     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */

  106.     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */

  107.     // Package

  108.     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */

  109.     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */

  110.     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */

  111.     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */

  112.     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */

  113.     // Track

  114.     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */

  115.     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x03,0x00,0x00}}, /* Track Numberr */

  116.     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */

  117.     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */

  118.     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */

  119.     // Sequence

  120.     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */

  121.     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */

  122.     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */

  123.     // Source Clip

  124.     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Start position */

  125.     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */

  126.     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */

  127.     // file descriptor

  128.     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* sub descriptor uid*/

  129.     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */

  130.     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */

  131.     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* essence container ul */

  132.     // generic picture eseence descriptor

  133.     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* stored width */

  134.     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* stored heigth */

  135.     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* aspect ratio*/

  136.     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* picture essence coding*/

  137.     // generic sound essence descriptor

  138.     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* audio sampling rate */

  139.     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* channel count */

  140.     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* quantization bits */

  141.     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* sound essence compression */

  142. };

  143. 

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

  145. {

  146.     put_buffer(pb, uuid_base, 12);

  147.     put_be16(pb, type);

  148.     put_be16(pb, value);

  149. }

  150. 

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

  152. {

  153.     put_buffer(pb, umid_base, 16);

  154.     mxf_write_uuid(pb, type, value);

  155. }

  156. 

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

  158. {

  159.     put_be32(pb, ref_count);

  160.     put_be32(pb, 16);

  161. }

  162. 

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

  164. {

  165.     // Determine the best BER size

  166.     int size;

  167.     if (len < 128) {

  168.         //short form

  169.         put_byte(pb, len);

  170.         return 1;

  171.     }

  172. 

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

  174. 

  175.     // long form

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

  177.     while(size) {

  178.         size --;

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

  180.     }

  181.     return 0;

  182. }

  183. 

  184. static const MXFCodecUL *mxf_get_essence_container_ul(enum CodecID type)

  185. {

  186.     const MXFCodecUL *uls = ff_mxf_essence_container_uls;

  187.     while (uls->id != CODEC_ID_NONE) {

  188.         if (uls->id == type)

  189.             break;

  190.         uls++;

  191.     }

  192.     return uls;

  193. }

  194. 

  195. static void mxf_write_primer_pack(AVFormatContext *s)

  196. {

  197.     ByteIOContext *pb = s->pb;

  198.     int local_tag_number, i = 0;

  199. 

  200.     local_tag_number = sizeof(mxf_local_tag_batch) / sizeof(MXFLocalTagPair);

  201. 

  202.     put_buffer(pb, primer_pack_key, 16);

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

  204. 

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

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

  207. 

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

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

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

  211.     }

  212. }

  213. 

  214. static void mxf_write_local_tag(ByteIOContext *pb, int value_size, int tag)

  215. {

  216.     put_be16(pb, tag);

  217.     put_be16(pb, value_size);

  218. }

  219. 

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

  221. {

  222.     put_buffer(pb, header_metadata_key, 13);

  223.     put_be24(pb, value);

  224. }

  225. 

  226. static void mxf_free(AVFormatContext *s)

  227. {

  228.     AVStream *st;

  229.     int i;

  230. 

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

  232.         st = s->streams[i];

  233.         av_freep(&st->priv_data);

  234.     }

  235. }

  236. 

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

  238. {

  239.     const MXFDataDefinitionUL *uls = ff_mxf_data_definition_uls;

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

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

  242.             break;

  243.         uls ++;

  244.     }

  245.     return uls;

  246. }

  247. 

  248. static void mxf_write_preface(AVFormatContext *s)

  249. {

  250.     MXFContext *mxf = s->priv_data;

  251.     ByteIOContext *pb = s->pb;

  252. 

  253.     mxf_write_metadata_key(pb, 0x012f00);

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

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

  256. 

  257.     // write preface set uid

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

  259.     mxf_write_uuid(pb, Preface, 0);

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

  261. 

  262.     // write create date as unknown

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

  264.     put_be64(pb, 0);

  265. 

  266.     // write version

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

  268.     put_be16(pb, 1);

  269. 

  270.     // write identification_refs

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

  272.     mxf_write_refs_count(pb, 1);

  273.     mxf_write_uuid(pb, Identification, 0);

  274. 

  275.     // write content_storage_refs

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

  277.     mxf_write_uuid(pb, ContentStorage, 0);

  278. 

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

  280.     put_buffer(pb, op1a_ul, 16);

  281. 

  282.     // write essence_container_refs

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

  284.     mxf_write_essence_container_refs(s, 1);

  285. 

  286.     // write dm_scheme_refs

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

  288.     put_be64(pb, 0);

  289. }

  290. 

  291. static void mxf_write_identification(AVFormatContext *s)

  292. {

  293.     ByteIOContext *pb = s->pb;

  294.     int length, company_name_len, product_name_len, version_string_len;

  295. 

  296.     mxf_write_metadata_key(pb, 0x013000);

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

  298.     company_name_len = sizeof("FFmpeg");

  299.     product_name_len = sizeof("OP1a Muxer");

  300. 

  301.     length = 80 + company_name_len + product_name_len;

  302.     if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {

  303.         version_string_len = sizeof(LIBAVFORMAT_IDENT);

  304.         length += 4 + version_string_len;

  305.     }

  306.     klv_encode_ber_length(pb, length);

  307. 

  308.     // write uid

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

  310.     mxf_write_uuid(pb, Identification, 0);

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

  312.     // write generation uid

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

  314.     mxf_write_uuid(pb, Identification, 1);

  315. 

  316.     mxf_write_local_tag(pb, company_name_len, 0x3C01);

  317.     put_buffer(pb, "FFmpeg", company_name_len);

  318. 

  319.     mxf_write_local_tag(pb, product_name_len, 0x3C02);

  320.     put_buffer(pb, "OP1a Muxer", product_name_len);

  321. 

  322.     if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {

  323.         mxf_write_local_tag(pb, version_string_len, 0x3C04);

  324.         put_buffer(pb, LIBAVFORMAT_IDENT, version_string_len);

  325.     }

  326. 

  327.     // write product uid

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

  329.     mxf_write_uuid(pb, Identification, 2);

  330. 

  331.     // write modified date

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

  333.     put_be64(pb, 0);

  334. }

  335. 

  336. static void mxf_write_content_storage(AVFormatContext *s)

  337. {

  338.     ByteIOContext *pb = s->pb;

  339. 

  340.     mxf_write_metadata_key(pb, 0x011800);

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

  342.     klv_encode_ber_length(pb, 64);

  343. 

  344.     // write uid

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

  346.     mxf_write_uuid(pb, ContentStorage, 0);

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

  348.     // write package reference

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

  350.     mxf_write_refs_count(pb, 2);

  351.     mxf_write_uuid(pb, MaterialPackage, 0);

  352.     mxf_write_uuid(pb, SourcePackage, 0);

  353. }

  354. 

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

  356. {

  357.     ByteIOContext *pb = s->pb;

  358.     int i;

  359. 

  360.     if (type == MaterialPackage) {

  361.         mxf_write_metadata_key(pb, 0x013600);

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

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

  364.     }

  365.     else {

  366.         mxf_write_metadata_key(pb, 0x013700);

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

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

  369.     }

  370. 

  371.     // write uid

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

  373.     mxf_write_uuid(pb, type, 0);

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

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

  376. 

  377.     // write package umid

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

  379.     mxf_write_umid(pb, type, 0);

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

  381.     // write create date

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

  383.     put_be64(pb, 0);

  384. 

  385.     // write modified date

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

  387.     put_be64(pb, 0);

  388. 

  389.     // write track refs

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

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

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

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

  394. 

  395.     if (type == SourcePackage) {

  396.         // write multiple descriptor reference

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

  398.         mxf_write_uuid(pb, MultipleDescriptor, 0);

  399.     }

  400. }

  401. 

  402. static void mxf_write_track(AVFormatContext *s, int stream_index, enum MXFMetadataSetType type, int *track_number_sign)

  403. {

  404.     ByteIOContext *pb = s->pb;

  405.     AVStream *st;

  406.     MXFStreamContext *sc;

  407.     const MXFCodecUL *element;

  408.     int i = 0;

  409. 

  410.     mxf_write_metadata_key(pb, 0x013b00);

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

  412.     klv_encode_ber_length(pb, 80);

  413. 

  414.     st = s->streams[stream_index];

  415.     sc = st->priv_data;

  416. 

  417.     // write track uid

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

  419.     mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, stream_index);

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

  421.     // write track id

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

  423.     put_be32(pb, stream_index);

  424. 

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

  426.     if (type != MaterialPackage) {

  427.         for (element = mxf_essence_element_key; element->id != CODEC_ID_NONE; element++) {

  428.             if (st->codec->codec_id== element->id) {

  429.                 // set essence_element key

  430.                 memcpy(sc->track_essence_element_key, element->uid, 16);

  431.                 sc->track_essence_element_key[15] += track_number_sign[i];

  432.                 // write track number

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

  434. 

  435.                 track_number_sign[i] ++;

  436.                 break;

  437.             }

  438.             i++;

  439.         }

  440.     } else {

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

  442.     }

  443. 

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

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

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

  447. 

  448.     // write origin

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

  450.     put_be64(pb, 0);

  451. 

  452.     // write sequence refs

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

  454.     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, stream_index);

  455. }

  456. 

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

  458. {

  459.     const MXFDataDefinitionUL * data_def_ul;

  460. 

  461.     // find data define uls

  462.     data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);

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

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

  465. 

  466.     // write duration

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

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

  469. }

  470. 

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

  472. {

  473.     ByteIOContext *pb = s->pb;

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

  475.     MXFStreamContext *sc = st->priv_data;

  476. 

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

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

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

  480. 

  481.     put_flush_packet(pb);

  482.     return 0;

  483. }

  484. 

  485. static void mxf_write_sequence(AVFormatContext *s, int stream_index, enum MXFMetadataSetType type)

  486. {

  487.     ByteIOContext *pb = s->pb;

  488.     AVStream *st;

  489. 

  490.     mxf_write_metadata_key(pb, 0x010f00);

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

  492.     klv_encode_ber_length(pb, 80);

  493. 

  494.     st = s->streams[stream_index];

  495. 

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

  497.     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, stream_index);

  498. 

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

  500.     mxf_write_common_fields(pb, st);

  501. 

  502.     // write structural component

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

  504.     mxf_write_refs_count(pb, 1);

  505.     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, stream_index);

  506. }

  507. 

  508. static void mxf_write_structural_component(AVFormatContext *s, int stream_index, enum MXFMetadataSetType type)

  509. {

  510.     ByteIOContext *pb = s->pb;

  511.     AVStream *st;

  512.     int i;

  513. 

  514.     mxf_write_metadata_key(pb, 0x011100);

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

  516.     klv_encode_ber_length(pb, 108);

  517. 

  518.     st = s->streams[stream_index];

  519. 

  520.     // write uid

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

  522.     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, stream_index);

  523. 

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

  525.     mxf_write_common_fields(pb, st);

  526. 

  527.     // write start_position

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

  529.     put_be64(pb, 0);

  530. 

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

  532.     if (type == SourcePackage) {

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

  534.         for (i = 0; i < 4; i++) {

  535.             put_be64(pb, 0);

  536.         }

  537.     } else

  538.         mxf_write_umid(pb, SourcePackage, 0);

  539. 

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

  541.     if (type == SourcePackage)

  542.         // write source track id

  543.         put_be32(pb, 0);

  544.     else

  545.         put_be32(pb, stream_index);

  546. }

  547. 

  548. static void mxf_write_multi_descriptor(AVFormatContext *s)

  549. {

  550.     ByteIOContext *pb = s->pb;

  551.     int i;

  552. 

  553.     mxf_write_metadata_key(pb, 0x014400);

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

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

  556. 

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

  558.     mxf_write_uuid(pb, MultipleDescriptor, 0);

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

  560. 

  561.     // write sample rate

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

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

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

  565. 

  566.     // write essence container ul

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

  568.     put_buffer(pb, multiple_desc_ul, 16);

  569. 

  570.     // write sub descriptor refs

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

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

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

  574.         mxf_write_uuid(pb, SubDescriptor, i);

  575.     }

  576. }

  577. 

  578. static void mxf_write_header_desc(ByteIOContext *pb, const MXFDescriptorWriteTableEntry *desc_tbl, AVStream *st)

  579. {

  580.     const MXFCodecUL *codec_ul;

  581. 

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

  583.     klv_encode_ber_length(pb, 108);

  584. 

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

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

  587. 

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

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

  590. 

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

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

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

  594. 

  595.     codec_ul = mxf_get_essence_container_ul(st->codec->codec_id);

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

  597.     put_buffer(pb, codec_ul->uid, 16);

  598. }

  599. 

  600. static void mxf_write_mpeg_video_desc(AVFormatContext *s, const MXFDescriptorWriteTableEntry *desc_tbl, int stream_index)

  601. {

  602.     ByteIOContext *pb = s->pb;

  603.     AVStream *st;

  604. 

  605.     st = s->streams[stream_index];

  606.     mxf_write_header_desc(pb, desc_tbl, st);

  607. 

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

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

  610. 

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

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

  613. 

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

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

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

  617. 

  618.     // tmp write, will modified later

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

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

  621. }

  622. 

  623. static void mxf_write_wav_desc(AVFormatContext *s, const MXFDescriptorWriteTableEntry *desc_tbl, int stream_index)

  624. {

  625.     ByteIOContext *pb = s->pb;

  626.     AVStream *st;

  627. 

  628.     st = s->streams[stream_index];

  629.     mxf_write_header_desc(pb, desc_tbl, st);

  630. 

  631.     // write audio sampling rate

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

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

  634.     put_be32(pb, 1);

  635. 

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

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

  638. 

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

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

  641. 

  642.     // tmp write, will modified later

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

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

  645. }

  646. 

  647. static const MXFDescriptorWriteTableEntry mxf_descriptor_write_table[] = {

  648.     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_write_mpeg_video_desc, CODEC_ID_MPEG2VIDEO},

  649.     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_write_wav_desc, CODEC_ID_PCM_S16LE},

  650.     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, CODEC_ID_NONE},

  651. };

  652. 

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

  654. {

  655.     int i;

  656.     const MXFDescriptorWriteTableEntry *desc = NULL;

  657.     int track_number_sign[sizeof(mxf_essence_element_key)/sizeof(MXFCodecUL)] = { 0 };

  658. 

  659.     mxf_write_package(s, type);

  660.     if (type == SourcePackage)

  661.         mxf_write_multi_descriptor(s);

  662. 

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

  664.         mxf_write_track(s, i, type, track_number_sign);

  665.         mxf_write_sequence(s, i, type);

  666.         mxf_write_structural_component(s, i, type);

  667. 

  668.         if (type == SourcePackage) {

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

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

  671.                     desc->write(s, desc, i);

  672.                     break;

  673.                 }

  674.             }

  675.         }

  676.     }

  677. }

  678. 

  679. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  680. {

  681.     AVStream *st;

  682.     MXFStreamContext *sc = NULL;

  683.     int i;

  684.     mxf_write_preface(s);

  685. 

  686.     mxf_write_identification(s);

  687. 

  688.     mxf_write_content_storage(s);

  689. 

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

  691.         st = s->streams[i];

  692.         sc = av_mallocz(sizeof(MXFStreamContext));

  693.         if (!sc)

  694.             return AVERROR(ENOMEM);

  695.         st->priv_data = sc;

  696.         // set pts information

  697.         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {

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

  699.         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {

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

  701.         }

  702.     }

  703. 

  704.     mxf_build_structural_metadata(s, MaterialPackage);

  705.     mxf_build_structural_metadata(s, SourcePackage);

  706.     return 0;

  707. }

  708. 

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

  710. {

  711.     MXFContext *mxf = s->priv_data;

  712.     ByteIOContext *pb = s->pb;

  713.     // write klv

  714.     put_buffer(pb, key, 16);

  715.     if (!mxf->essence_container_count)

  716.         mxf->essence_container_count = mxf_write_essence_container_refs(s, 0);

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

  718. 

  719.     // write partition value

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

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

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

  723. 

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

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

  726. 

  727.     // set offset

  728.     if (!byte_position)

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

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

  731. 

  732.     // set offset

  733.     if (!byte_position)

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

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

  736. 

  737.     // no indexTable

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

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

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

  741. 

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

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

  744. 

  745.     // essence container

  746.     mxf_write_essence_container_refs(s, 1);

  747. }

  748. 

  749. static int mux_write_header(AVFormatContext *s)

  750. {

  751.     MXFContext *mxf = s->priv_data;

  752.     ByteIOContext *pb = s->pb;

  753.     int64_t header_metadata_start, offset_now;

  754. 

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

  756. 

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

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

  759.     mxf_write_primer_pack(s);

  760.     if (mxf_write_header_metadata_sets(s) < 0)

  761.         goto fail;

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

  763.     mxf->header_byte_count = offset_now - header_metadata_start;

  764.     // update header_byte_count

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

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

  767.     url_fseek(pb, offset_now, SEEK_SET);

  768. 

  769.     put_flush_packet(pb);

  770.     return 0;

  771. fail:

  772.     mxf_free(s);

  773.     return -1;

  774. }

  775. 

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

  777. {

  778.     MXFContext *mxf = s->priv_data;

  779.     ByteIOContext *pb = s->pb;

  780. 

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

  782.     put_be64(pb, footer_partition_offset);

  783.     put_flush_packet(pb);

  784. }

  785. 

  786. 

  787. static int mux_write_footer(AVFormatContext *s)

  788. {

  789.     ByteIOContext *pb = s->pb;

  790. 

  791.     int64_t byte_position= url_ftell(pb);

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

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

  794. 

  795.         put_flush_packet(pb);

  796. 

  797.         mxf_update_header_partition(s, byte_position);

  798.     }

  799.     mxf_free(s);

  800.     return 0;

  801. }

  802. 

  803. AVOutputFormat mxf_muxer = {

  804.     "mxf",

  805.     NULL_IF_CONFIG_SMALL("Material eXchange Format"),

  806.     NULL,

  807.     "mxf",

  808.     sizeof(MXFContext),

  809.     CODEC_ID_PCM_S16LE,

  810.     CODEC_ID_MPEG2VIDEO,

  811.     mux_write_header,

  812.     mux_write_packet,

  813.     mux_write_footer,

  814. };

  815.