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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,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* 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 Number */

  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 Descriptors reference array */

  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 */

  132.     // Generic Picture Essence 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 Height */

  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}}, /* ChannelCount */

  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 int mxf_write_essence_container_refs(AVFormatContext *s, int write)

  249. {

  250.     ByteIOContext *pb = s->pb;

  251.     AVStream *st;

  252.     int i, count = 0, j = 0;

  253.     const MXFCodecUL *codec_ul;

  254.     int essence_container_ul_sign[sizeof(ff_mxf_essence_container_uls) / sizeof(MXFCodecUL)] = { 0 };

  255. 

  256.     for (codec_ul = ff_mxf_essence_container_uls; codec_ul->id; codec_ul++) {

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

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

  259.             if (st->codec->codec_id == codec_ul->id) {

  260.                 essence_container_ul_sign[count] = j;

  261.                 count++;

  262.                 break;

  263.             }

  264.         }

  265.         j++;

  266.         // considering WAV/AES3 frame wrapped, when get the first CODEC_ID_PCM_S16LE, break;

  267.         // this is a temporary method, when we can get  more information, modofy this.

  268.         if (codec_ul->id == CODEC_ID_PCM_S16LE)

  269.             break;

  270.     }

  271. 

  272.     if (write) {

  273.         mxf_write_refs_count(pb, count);

  274.         for (i = 0; i < count; i++) {

  275.             put_buffer(pb, ff_mxf_essence_container_uls[essence_container_ul_sign[i]].uid, 16);

  276.         }

  277.         av_log(s,AV_LOG_DEBUG, "essence container count:%d\n", count);

  278.         for (i = 0; i < count; i++)

  279.             PRINT_KEY(s, "essence container ul:\n", ff_mxf_essence_container_uls[essence_container_ul_sign[i]].uid);

  280.     }

  281.     return count;

  282. }

  283. 

  284. static void mxf_write_preface(AVFormatContext *s)

  285. {

  286.     MXFContext *mxf = s->priv_data;

  287.     ByteIOContext *pb = s->pb;

  288. 

  289.     mxf_write_metadata_key(pb, 0x012f00);

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

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

  292. 

  293.     // write preface set uid

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

  295.     mxf_write_uuid(pb, Preface, 0);

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

  297. 

  298.     // write create date as unknown

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

  300.     put_be64(pb, 0);

  301. 

  302.     // write version

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

  304.     put_be16(pb, 1);

  305. 

  306.     // write identification_refs

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

  308.     mxf_write_refs_count(pb, 1);

  309.     mxf_write_uuid(pb, Identification, 0);

  310. 

  311.     // write content_storage_refs

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

  313.     mxf_write_uuid(pb, ContentStorage, 0);

  314. 

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

  316.     put_buffer(pb, op1a_ul, 16);

  317. 

  318.     // write essence_container_refs

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

  320.     mxf_write_essence_container_refs(s, 1);

  321. 

  322.     // write dm_scheme_refs

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

  324.     put_be64(pb, 0);

  325. }

  326. 

  327. /*

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

  329.  */

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

  331. {

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

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

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

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

  336. }

  337. 

  338. static void mxf_write_identification(AVFormatContext *s)

  339. {

  340.     ByteIOContext *pb = s->pb;

  341.     const char *version;

  342.     int length, company_name_len, product_name_len, version_string_len;

  343. 

  344.     mxf_write_metadata_key(pb, 0x013000);

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

  346.     company_name_len = strlen("FFmpeg") * 2;

  347.     product_name_len = strlen("OP1a Muxer") * 2;

  348. 

  349.     length = 80 + company_name_len + product_name_len;

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

  351.         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);

  352.     length += 4 + strlen(version)*2;

  353.     klv_encode_ber_length(pb, length);

  354. 

  355.     // write uid

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

  357.     mxf_write_uuid(pb, Identification, 0);

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

  359.     // write generation uid

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

  361.     mxf_write_uuid(pb, Identification, 1);

  362. 

  363.     mxf_write_local_tag_utf16(pb, 0x3C01, "FFmpeg");     // Company Name

  364.     mxf_write_local_tag_utf16(pb, 0x3C02, "OP1a Muxer"); // Product Name

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

  366. 

  367.     // write product uid

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

  369.     mxf_write_uuid(pb, Identification, 2);

  370. 

  371.     // write modified date

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

  373.     put_be64(pb, 0);

  374. }

  375. 

  376. static void mxf_write_content_storage(AVFormatContext *s)

  377. {

  378.     ByteIOContext *pb = s->pb;

  379. 

  380.     mxf_write_metadata_key(pb, 0x011800);

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

  382.     klv_encode_ber_length(pb, 64);

  383. 

  384.     // write uid

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

  386.     mxf_write_uuid(pb, ContentStorage, 0);

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

  388.     // write package reference

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

  390.     mxf_write_refs_count(pb, 2);

  391.     mxf_write_uuid(pb, MaterialPackage, 0);

  392.     mxf_write_uuid(pb, SourcePackage, 0);

  393. }

  394. 

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

  396. {

  397.     ByteIOContext *pb = s->pb;

  398.     int i;

  399. 

  400.     if (type == MaterialPackage) {

  401.         mxf_write_metadata_key(pb, 0x013600);

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

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

  404.     }

  405.     else {

  406.         mxf_write_metadata_key(pb, 0x013700);

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

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

  409.     }

  410. 

  411.     // write uid

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

  413.     mxf_write_uuid(pb, type, 0);

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

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

  416. 

  417.     // write package umid

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

  419.     mxf_write_umid(pb, type, 0);

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

  421.     // write create date

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

  423.     put_be64(pb, 0);

  424. 

  425.     // write modified date

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

  427.     put_be64(pb, 0);

  428. 

  429.     // write track refs

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

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

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

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

  434. 

  435.     if (type == SourcePackage) {

  436.         // write multiple descriptor reference

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

  438.         mxf_write_uuid(pb, MultipleDescriptor, 0);

  439.     }

  440. }

  441. 

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

  443. {

  444.     ByteIOContext *pb = s->pb;

  445.     AVStream *st;

  446.     MXFStreamContext *sc;

  447.     const MXFCodecUL *element;

  448.     int i = 0;

  449. 

  450.     mxf_write_metadata_key(pb, 0x013b00);

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

  452.     klv_encode_ber_length(pb, 80);

  453. 

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

  455.     sc = st->priv_data;

  456. 

  457.     // write track uid

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

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

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

  461.     // write track id

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

  463.     put_be32(pb, stream_index);

  464. 

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

  466.     if (type != MaterialPackage) {

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

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

  469.                 // set essence_element key

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

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

  472.                 // write track number

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

  474. 

  475.                 track_number_sign[i] ++;

  476.                 break;

  477.             }

  478.             i++;

  479.         }

  480.     } else {

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

  482.     }

  483. 

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

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

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

  487. 

  488.     // write origin

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

  490.     put_be64(pb, 0);

  491. 

  492.     // write sequence refs

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

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

  495. }

  496. 

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

  498. {

  499.     const MXFDataDefinitionUL * data_def_ul;

  500. 

  501.     // find data define uls

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

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

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

  505. 

  506.     // write duration

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

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

  509. }

  510. 

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

  512. {

  513.     ByteIOContext *pb = s->pb;

  514.     AVStream *st;

  515. 

  516.     mxf_write_metadata_key(pb, 0x010f00);

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

  518.     klv_encode_ber_length(pb, 80);

  519. 

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

  521. 

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

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

  524. 

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

  526.     mxf_write_common_fields(pb, st);

  527. 

  528.     // write structural component

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

  530.     mxf_write_refs_count(pb, 1);

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

  532. }

  533. 

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

  535. {

  536.     ByteIOContext *pb = s->pb;

  537.     AVStream *st;

  538.     int i;

  539. 

  540.     mxf_write_metadata_key(pb, 0x011100);

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

  542.     klv_encode_ber_length(pb, 108);

  543. 

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

  545. 

  546.     // write uid

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

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

  549. 

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

  551.     mxf_write_common_fields(pb, st);

  552. 

  553.     // write start_position

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

  555.     put_be64(pb, 0);

  556. 

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

  558.     if (type == SourcePackage) {

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

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

  561.             put_be64(pb, 0);

  562.         }

  563.     } else

  564.         mxf_write_umid(pb, SourcePackage, 0);

  565. 

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

  567.     if (type == SourcePackage)

  568.         // write source track id

  569.         put_be32(pb, 0);

  570.     else

  571.         put_be32(pb, stream_index);

  572. }

  573. 

  574. static void mxf_write_multi_descriptor(AVFormatContext *s)

  575. {

  576.     ByteIOContext *pb = s->pb;

  577.     int i;

  578. 

  579.     mxf_write_metadata_key(pb, 0x014400);

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

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

  582. 

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

  584.     mxf_write_uuid(pb, MultipleDescriptor, 0);

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

  586. 

  587.     // write sample rate

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

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

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

  591. 

  592.     // write essence container ul

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

  594.     put_buffer(pb, multiple_desc_ul, 16);

  595. 

  596.     // write sub descriptor refs

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

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

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

  600.         mxf_write_uuid(pb, SubDescriptor, i);

  601.     }

  602. }

  603. 

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

  605. {

  606.     const MXFCodecUL *codec_ul;

  607. 

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

  609.     klv_encode_ber_length(pb, 108);

  610. 

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

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

  613. 

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

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

  616. 

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

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

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

  620. 

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

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

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

  624. }

  625. 

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

  627. {

  628.     ByteIOContext *pb = s->pb;

  629.     AVStream *st;

  630. 

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

  632.     mxf_write_header_desc(pb, desc_tbl, st);

  633. 

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

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

  636. 

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

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

  639. 

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

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

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

  643. 

  644.     // tmp write, will modified later

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

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

  647. }

  648. 

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

  650. {

  651.     ByteIOContext *pb = s->pb;

  652.     AVStream *st;

  653. 

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

  655.     mxf_write_header_desc(pb, desc_tbl, st);

  656. 

  657.     // write audio sampling rate

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

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

  660.     put_be32(pb, 1);

  661. 

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

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

  664. 

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

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

  667. 

  668.     // tmp write, will modified later

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

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

  671. }

  672. 

  673. static const MXFDescriptorWriteTableEntry mxf_descriptor_write_table[] = {

  674.     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_write_mpeg_video_desc, CODEC_ID_MPEG2VIDEO},

  675.     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_write_wav_desc, CODEC_ID_PCM_S16LE},

  676.     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, CODEC_ID_NONE},

  677. };

  678. 

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

  680. {

  681.     int i;

  682.     const MXFDescriptorWriteTableEntry *desc = NULL;

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

  684. 

  685.     mxf_write_package(s, type);

  686.     if (type == SourcePackage)

  687.         mxf_write_multi_descriptor(s);

  688. 

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

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

  691.         mxf_write_sequence(s, i, type);

  692.         mxf_write_structural_component(s, i, type);

  693. 

  694.         if (type == SourcePackage) {

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

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

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

  698.                     break;

  699.                 }

  700.             }

  701.         }

  702.     }

  703. }

  704. 

  705. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  706. {

  707.     AVStream *st;

  708.     MXFStreamContext *sc = NULL;

  709.     int i;

  710.     mxf_write_preface(s);

  711. 

  712.     mxf_write_identification(s);

  713. 

  714.     mxf_write_content_storage(s);

  715. 

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

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

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

  719.         if (!sc)

  720.             return AVERROR(ENOMEM);

  721.         st->priv_data = sc;

  722.         // set pts information

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

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

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

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

  727.         }

  728.     }

  729. 

  730.     mxf_build_structural_metadata(s, MaterialPackage);

  731.     mxf_build_structural_metadata(s, SourcePackage);

  732.     return 0;

  733. }

  734. 

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

  736. {

  737.     MXFContext *mxf = s->priv_data;

  738.     ByteIOContext *pb = s->pb;

  739.     // write klv

  740.     put_buffer(pb, key, 16);

  741.     if (!mxf->essence_container_count)

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

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

  744. 

  745.     // write partition value

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

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

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

  749. 

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

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

  752. 

  753.     // set offset

  754.     if (!byte_position)

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

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

  757. 

  758.     // set offset

  759.     if (!byte_position)

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

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

  762. 

  763.     // no indexTable

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

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

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

  767. 

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

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

  770. 

  771.     // essence container

  772.     mxf_write_essence_container_refs(s, 1);

  773. }

  774. 

  775. static int mux_write_header(AVFormatContext *s)

  776. {

  777.     MXFContext *mxf = s->priv_data;

  778.     ByteIOContext *pb = s->pb;

  779.     int64_t header_metadata_start, offset_now;

  780. 

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

  782. 

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

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

  785.     mxf_write_primer_pack(s);

  786.     if (mxf_write_header_metadata_sets(s) < 0)

  787.         goto fail;

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

  789.     mxf->header_byte_count = offset_now - header_metadata_start;

  790.     // update header_byte_count

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

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

  793.     url_fseek(pb, offset_now, SEEK_SET);

  794. 

  795.     put_flush_packet(pb);

  796.     return 0;

  797. fail:

  798.     mxf_free(s);

  799.     return -1;

  800. }

  801. 

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

  803. {

  804.     ByteIOContext *pb = s->pb;

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

  806.     MXFStreamContext *sc = st->priv_data;

  807. 

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

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

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

  811. 

  812.     put_flush_packet(pb);

  813.     return 0;

  814. }

  815. 

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

  817. {

  818.     MXFContext *mxf = s->priv_data;

  819.     ByteIOContext *pb = s->pb;

  820. 

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

  822.     put_be64(pb, footer_partition_offset);

  823.     put_flush_packet(pb);

  824. }

  825. 

  826. 

  827. static int mux_write_footer(AVFormatContext *s)

  828. {

  829.     ByteIOContext *pb = s->pb;

  830. 

  831.     int64_t byte_position= url_ftell(pb);

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

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

  834. 

  835.         put_flush_packet(pb);

  836. 

  837.         mxf_update_header_partition(s, byte_position);

  838.     }

  839.     mxf_free(s);

  840.     return 0;

  841. }

  842. 

  843. AVOutputFormat mxf_muxer = {

  844.     "mxf",

  845.     NULL_IF_CONFIG_SMALL("Material eXchange Format"),

  846.     NULL,

  847.     "mxf",

  848.     sizeof(MXFContext),

  849.     CODEC_ID_PCM_S16LE,

  850.     CODEC_ID_MPEG2VIDEO,

  851.     mux_write_header,

  852.     mux_write_packet,

  853.     mux_write_footer,

  854. };

  855.