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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_common_fields(    ByteIOContext *pb, AVStream *st)

  356. {

  357.     const MXFDataDefinitionUL * data_def_ul;

  358. 

  359.     // find data define uls

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

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

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

  363. 

  364.     // write duration

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

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

  367. }

  368. 

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

  370. {

  371.     ByteIOContext *pb = s->pb;

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

  373.     MXFStreamContext *sc = st->priv_data;

  374. 

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

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

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

  378. 

  379.     put_flush_packet(pb);

  380.     return 0;

  381. }

  382. 

  383. static void mxf_write_multi_descriptor(AVFormatContext *s)

  384. {

  385.     ByteIOContext *pb = s->pb;

  386.     int i;

  387. 

  388.     mxf_write_metadata_key(pb, 0x014400);

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

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

  391. 

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

  393.     mxf_write_uuid(pb, MultipleDescriptor, 0);

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

  395. 

  396.     // write sample rate

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

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

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

  400. 

  401.     // write essence container ul

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

  403.     put_buffer(pb, multiple_desc_ul, 16);

  404. 

  405.     // write sub descriptor refs

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

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

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

  409.         mxf_write_uuid(pb, SubDescriptor, i);

  410.     }

  411. }

  412. 

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

  414. {

  415.     const MXFCodecUL *codec_ul;

  416. 

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

  418.     klv_encode_ber_length(pb, 108);

  419. 

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

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

  422. 

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

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

  425. 

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

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

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

  429. 

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

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

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

  433. }

  434. 

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

  436. {

  437.     ByteIOContext *pb = s->pb;

  438.     AVStream *st;

  439. 

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

  441.     mxf_write_header_desc(pb, desc_tbl, st);

  442. 

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

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

  445. 

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

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

  448. 

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

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

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

  452. 

  453.     // tmp write, will modified later

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

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

  456. }

  457. 

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

  459. {

  460.     ByteIOContext *pb = s->pb;

  461.     AVStream *st;

  462. 

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

  464.     mxf_write_header_desc(pb, desc_tbl, st);

  465. 

  466.     // write audio sampling rate

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

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

  469.     put_be32(pb, 1);

  470. 

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

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

  473. 

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

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

  476. 

  477.     // tmp write, will modified later

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

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

  480. }

  481. 

  482. static const MXFDescriptorWriteTableEntry mxf_descriptor_write_table[] = {

  483.     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_write_mpeg_video_desc, CODEC_ID_MPEG2VIDEO},

  484.     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_write_wav_desc, CODEC_ID_PCM_S16LE},

  485.     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, CODEC_ID_NONE},

  486. };

  487. 

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

  489. {

  490.     int i;

  491.     const MXFDescriptorWriteTableEntry *desc = NULL;

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

  493. 

  494.     mxf_write_package(s, type);

  495.     if (type == SourcePackage)

  496.         mxf_write_multi_descriptor(s);

  497. 

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

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

  500.         mxf_write_sequence(s, i, type);

  501.         mxf_write_structural_component(s, i, type);

  502. 

  503.         if (type == SourcePackage) {

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

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

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

  507.                     break;

  508.                 }

  509.             }

  510.         }

  511.     }

  512. }

  513. 

  514. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  515. {

  516.     AVStream *st;

  517.     MXFStreamContext *sc = NULL;

  518.     int i;

  519.     mxf_write_preface(s);

  520. 

  521.     mxf_write_identification(s);

  522. 

  523.     mxf_write_content_storage(s);

  524. 

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

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

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

  528.         if (!sc)

  529.             return AVERROR(ENOMEM);

  530.         st->priv_data = sc;

  531.         // set pts information

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

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

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

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

  536.         }

  537.     }

  538. 

  539.     mxf_build_structural_metadata(s, MaterialPackage);

  540.     mxf_build_structural_metadata(s, SourcePackage);

  541.     return 0;

  542. }

  543. 

  544. static int mux_write_header(AVFormatContext *s)

  545. {

  546.     MXFContext *mxf = s->priv_data;

  547.     ByteIOContext *pb = s->pb;

  548.     int64_t header_metadata_start, offset_now;

  549. 

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

  551. 

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

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

  554.     mxf_write_primer_pack(s);

  555.     if (mxf_write_header_metadata_sets(s) < 0)

  556.         goto fail;

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

  558.     mxf->header_byte_count = offset_now - header_metadata_start;

  559.     // update header_byte_count

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

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

  562.     url_fseek(pb, offset_now, SEEK_SET);

  563. 

  564.     put_flush_packet(pb);

  565.     return 0;

  566. fail:

  567.     mxf_free(s);

  568.     return -1;

  569. }

  570. 

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

  572. {

  573.     MXFContext *mxf = s->priv_data;

  574.     ByteIOContext *pb = s->pb;

  575. 

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

  577.     put_be64(pb, footer_partition_offset);

  578.     put_flush_packet(pb);

  579. }

  580. 

  581. 

  582. static int mux_write_footer(AVFormatContext *s)

  583. {

  584.     ByteIOContext *pb = s->pb;

  585. 

  586.     int64_t byte_position= url_ftell(pb);

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

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

  589. 

  590.         put_flush_packet(pb);

  591. 

  592.         mxf_update_header_partition(s, byte_position);

  593.     }

  594.     mxf_free(s);

  595.     return 0;

  596. }

  597. 

  598. AVOutputFormat mxf_muxer = {

  599.     "mxf",

  600.     NULL_IF_CONFIG_SMALL("Material eXchange Format"),

  601.     NULL,

  602.     "mxf",

  603.     sizeof(MXFContext),

  604.     CODEC_ID_PCM_S16LE,

  605.     CODEC_ID_MPEG2VIDEO,

  606.     mux_write_header,

  607.     mux_write_packet,

  608.     mux_write_footer,

  609. };

  610.