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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 "libavutil/fifo.h"

  35. #include "mxf.h"

  36. 

  37. static const int NTSC_samples_per_frame[] = { 1602, 1601, 1602, 1601, 1602, 0 };

  38. static const int PAL_samples_per_frame[]  = { 1920, 0 };

  39. 

  40. typedef struct {

  41.     AVFifoBuffer fifo;

  42.     unsigned fifo_size; ///< current fifo size allocated

  43.     uint64_t dts; ///< current dts

  44.     int sample_size; ///< size of one sample all channels included

  45.     const int *samples_per_frame; ///< must be 0 terminated

  46.     const int *samples; ///< current samples per frame, pointer to samples_per_frame

  47. } AudioInterleaveContext;

  48. 

  49. typedef struct {

  50.     int local_tag;

  51.     UID uid;

  52. } MXFLocalTagPair;

  53. 

  54. typedef struct {

  55.     AudioInterleaveContext aic;

  56.     UID track_essence_element_key;

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

  58.     const UID *codec_ul;

  59.     int64_t duration;

  60.     int order; ///< interleaving order if dts are equal

  61.     int interlaced; ///< wether picture is interlaced

  62. } MXFStreamContext;

  63. 

  64. typedef struct {

  65.     UID container_ul;

  66.     UID element_ul;

  67.     UID codec_ul;

  68.     enum CodecID id;

  69.     void (*write_desc)();

  70. } MXFContainerEssenceEntry;

  71. 

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

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

  74. 

  75. static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {

  76.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },

  77.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  78.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },

  79.       CODEC_ID_MPEG2VIDEO, mxf_write_mpegvideo_desc },

  80.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },

  81.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },

  82.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  83.       CODEC_ID_PCM_S16LE, mxf_write_wav_desc },

  84.     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  85.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  86.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  87.       CODEC_ID_NONE, NULL },

  88. };

  89. 

  90. typedef struct MXFContext {

  91.     int64_t footer_partition_offset;

  92.     int essence_container_count;

  93.     uint8_t essence_containers_indices[FF_ARRAY_ELEMS(mxf_essence_container_uls)];

  94.     AVRational time_base;

  95.     int header_written;

  96. } MXFContext;

  97. 

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

  99. static const uint8_t umid_base[]            = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x01,0x0D,0x00,0x13,0x00,0x00,0x00 };

  100. 

  101. /**

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

  103.  */

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

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

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

  107. 

  108. 

  109. static const uint8_t header_open_partition_key[]   = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }; // OpenIncomplete

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

  111. 

  112. /**

  113.  * partial key for header metadata

  114.  */

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

  116. 

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

  118. 

  119. /**

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

  121.  */

  122. static const MXFLocalTagPair mxf_local_tag_batch[] = {

  123.     // preface set

  124.     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */

  125.     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */

  126.     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */

  127.     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */

  128.     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */

  129.     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */

  130.     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */

  131.     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */

  132.     // Identification

  133.     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */

  134.     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */

  135.     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */

  136.     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */

  137.     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */

  138.     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */

  139.     // Content Storage

  140.     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */

  141.     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */

  142.     // Essence Container Data

  143.     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */

  144.     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */

  145.     // Package

  146.     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */

  147.     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */

  148.     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */

  149.     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */

  150.     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */

  151.     // Track

  152.     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */

  153.     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */

  154.     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */

  155.     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */

  156.     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */

  157.     // Sequence

  158.     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */

  159.     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */

  160.     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */

  161.     // Source Clip

  162.     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */

  163.     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */

  164.     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */

  165.     // File Descriptor

  166.     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */

  167.     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */

  168.     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */

  169.     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */

  170.     // Generic Picture Essence Descriptor

  171.     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */

  172.     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */

  173.     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */

  174.     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */

  175.     // Generic Sound Essence Descriptor

  176.     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */

  177.     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */

  178.     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */

  179.     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */

  180. };

  181. 

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

  183. {

  184.     put_buffer(pb, uuid_base, 12);

  185.     put_be16(pb, type);

  186.     put_be16(pb, value);

  187. }

  188. 

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

  190. {

  191.     put_buffer(pb, umid_base, 16);

  192.     mxf_write_uuid(pb, type, value);

  193. }

  194. 

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

  196. {

  197.     put_be32(pb, ref_count);

  198.     put_be32(pb, 16);

  199. }

  200. 

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

  202. {

  203.     // Determine the best BER size

  204.     int size;

  205.     if (len < 128) {

  206.         //short form

  207.         put_byte(pb, len);

  208.         return 1;

  209.     }

  210. 

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

  212. 

  213.     // long form

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

  215.     while(size) {

  216.         size --;

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

  218.     }

  219.     return 0;

  220. }

  221. 

  222. /*

  223.  * Get essence container ul index

  224.  */

  225. static int mxf_get_essence_container_ul_index(enum CodecID id)

  226. {

  227.     int i;

  228.     for (i = 0; i < FF_ARRAY_ELEMS(mxf_essence_container_uls); i++)

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

  230.             return i;

  231.     return -1;

  232. }

  233. 

  234. static void mxf_write_primer_pack(AVFormatContext *s)

  235. {

  236.     ByteIOContext *pb = s->pb;

  237.     int local_tag_number, i = 0;

  238. 

  239.     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);

  240. 

  241.     put_buffer(pb, primer_pack_key, 16);

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

  243. 

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

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

  246. 

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

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

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

  250.     }

  251. }

  252. 

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

  254. {

  255.     put_be16(pb, tag);

  256.     put_be16(pb, size);

  257. }

  258. 

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

  260. {

  261.     put_buffer(pb, header_metadata_key, 13);

  262.     put_be24(pb, value);

  263. }

  264. 

  265. static void mxf_free(AVFormatContext *s)

  266. {

  267.     int i;

  268. 

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

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

  271.         av_freep(&st->priv_data);

  272.     }

  273. }

  274. 

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

  276. {

  277.     const MXFDataDefinitionUL *uls = ff_mxf_data_definition_uls;

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

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

  280.             break;

  281.         uls++;

  282.     }

  283.     return uls;

  284. }

  285. 

  286. static void mxf_write_essence_container_refs(AVFormatContext *s)

  287. {

  288.     MXFContext *c = s->priv_data;

  289.     ByteIOContext *pb = s->pb;

  290.     int i;

  291. 

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

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

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

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

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

  297.     }

  298. }

  299. 

  300. static void mxf_write_preface(AVFormatContext *s)

  301. {

  302.     MXFContext *mxf = s->priv_data;

  303.     ByteIOContext *pb = s->pb;

  304. 

  305.     mxf_write_metadata_key(pb, 0x012f00);

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

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

  308. 

  309.     // write preface set uid

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

  311.     mxf_write_uuid(pb, Preface, 0);

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

  313. 

  314.     // write create date as unknown

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

  316.     put_be64(pb, 0);

  317. 

  318.     // write version

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

  320.     put_be16(pb, 1);

  321. 

  322.     // write identification_refs

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

  324.     mxf_write_refs_count(pb, 1);

  325.     mxf_write_uuid(pb, Identification, 0);

  326. 

  327.     // write content_storage_refs

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

  329.     mxf_write_uuid(pb, ContentStorage, 0);

  330. 

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

  332.     put_buffer(pb, op1a_ul, 16);

  333. 

  334.     // write essence_container_refs

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

  336.     mxf_write_essence_container_refs(s);

  337. 

  338.     // write dm_scheme_refs

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

  340.     put_be64(pb, 0);

  341. }

  342. 

  343. /*

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

  345.  */

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

  347. {

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

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

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

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

  352. }

  353. 

  354. static void mxf_write_identification(AVFormatContext *s)

  355. {

  356.     ByteIOContext *pb = s->pb;

  357.     const char *company = "FFmpeg";

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

  359.     const char *version;

  360.     int length;

  361. 

  362.     mxf_write_metadata_key(pb, 0x013000);

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

  364. 

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

  366.         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);

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

  368.     klv_encode_ber_length(pb, length);

  369. 

  370.     // write uid

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

  372.     mxf_write_uuid(pb, Identification, 0);

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

  374. 

  375.     // write generation uid

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

  377.     mxf_write_uuid(pb, Identification, 1);

  378. 

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

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

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

  382. 

  383.     // write product uid

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

  385.     mxf_write_uuid(pb, Identification, 2);

  386. 

  387.     // write modified date

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

  389.     put_be64(pb, 0);

  390. }

  391. 

  392. static void mxf_write_content_storage(AVFormatContext *s)

  393. {

  394.     ByteIOContext *pb = s->pb;

  395. 

  396.     mxf_write_metadata_key(pb, 0x011800);

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

  398.     klv_encode_ber_length(pb, 92);

  399. 

  400.     // write uid

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

  402.     mxf_write_uuid(pb, ContentStorage, 0);

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

  404. 

  405.     // write package reference

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

  407.     mxf_write_refs_count(pb, 2);

  408.     mxf_write_uuid(pb, MaterialPackage, 0);

  409.     mxf_write_uuid(pb, SourcePackage, 0);

  410. 

  411.     // write essence container data

  412.     mxf_write_local_tag(pb, 8 + 16, 0x1902);

  413.     mxf_write_refs_count(pb, 1);

  414.     mxf_write_uuid(pb, EssenceContainerData, 0);

  415. }

  416. 

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

  418. {

  419.     ByteIOContext *pb = s->pb;

  420.     MXFStreamContext *sc = st->priv_data;

  421. 

  422.     mxf_write_metadata_key(pb, 0x013b00);

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

  424.     klv_encode_ber_length(pb, 80);

  425. 

  426.     // write track uid

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

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

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

  430. 

  431.     // write track id

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

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

  434. 

  435.     // write track number

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

  437.     if (type == MaterialPackage)

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

  439.     else

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

  441. 

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

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

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

  445. 

  446.     // write origin

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

  448.     put_be64(pb, 0);

  449. 

  450.     // write sequence refs

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

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

  453. }

  454. 

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

  456. {

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

  458.     MXFStreamContext *sc = st->priv_data;

  459. 

  460.     // find data define uls

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

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

  463. 

  464.     // write duration

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

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

  467. }

  468. 

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

  470. {

  471.     ByteIOContext *pb = s->pb;

  472. 

  473.     mxf_write_metadata_key(pb, 0x010f00);

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

  475.     klv_encode_ber_length(pb, 80);

  476. 

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

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

  479. 

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

  481.     mxf_write_common_fields(pb, st);

  482. 

  483.     // write structural component

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

  485.     mxf_write_refs_count(pb, 1);

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

  487. }

  488. 

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

  490. {

  491.     ByteIOContext *pb = s->pb;

  492.     int i;

  493. 

  494.     mxf_write_metadata_key(pb, 0x011100);

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

  496.     klv_encode_ber_length(pb, 108);

  497. 

  498.     // write uid

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

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

  501. 

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

  503.     mxf_write_common_fields(pb, st);

  504. 

  505.     // write start_position

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

  507.     put_be64(pb, 0);

  508. 

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

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

  511.     if (type == SourcePackage) {

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

  513.             put_be64(pb, 0);

  514.     } else

  515.         mxf_write_umid(pb, SourcePackage, 0);

  516. 

  517.     // write source track id

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

  519.     if (type == SourcePackage)

  520.         put_be32(pb, 0);

  521.     else

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

  523. }

  524. 

  525. static void mxf_write_multi_descriptor(AVFormatContext *s)

  526. {

  527.     ByteIOContext *pb = s->pb;

  528.     int i;

  529. 

  530.     mxf_write_metadata_key(pb, 0x014400);

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

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

  533. 

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

  535.     mxf_write_uuid(pb, MultipleDescriptor, 0);

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

  537. 

  538.     // write sample rate

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

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

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

  542. 

  543.     // write essence container ul

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

  545.     put_buffer(pb, multiple_desc_ul, 16);

  546. 

  547.     // write sub descriptor refs

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

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

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

  551.         mxf_write_uuid(pb, SubDescriptor, i);

  552. }

  553. 

  554. static void mxf_write_generic_desc(ByteIOContext *pb, AVStream *st, const UID key, unsigned size)

  555. {

  556.     MXFStreamContext *sc = st->priv_data;

  557. 

  558.     put_buffer(pb, key, 16);

  559.     klv_encode_ber_length(pb, size);

  560. 

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

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

  563. 

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

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

  566. 

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

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

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

  570. 

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

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

  573. }

  574. 

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

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

  577. 

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

  579. {

  580.     MXFStreamContext *sc = st->priv_data;

  581.     ByteIOContext *pb = s->pb;

  582.     int stored_height = (st->codec->height+15)/16*16;

  583.     AVRational dar;

  584. 

  585.     mxf_write_generic_desc(pb, st, mxf_mpegvideo_descriptor_key, 108);

  586. 

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

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

  589. 

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

  591.     put_be32(pb, stored_height>>sc->interlaced);

  592. 

  593.     av_reduce(&dar.num, &dar.den,

  594.               st->codec->width*st->codec->sample_aspect_ratio.num,

  595.               st->codec->height*st->codec->sample_aspect_ratio.den,

  596.               1024*1024);

  597. 

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

  599.     put_be32(pb, dar.num);

  600.     put_be32(pb, dar.den);

  601. 

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

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

  604. }

  605. 

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

  607. {

  608.     ByteIOContext *pb = s->pb;

  609. 

  610.     mxf_write_generic_desc(pb, st, mxf_wav_descriptor_key, 88);

  611. 

  612.     // write audio sampling rate

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

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

  615.     put_be32(pb, 1);

  616. 

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

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

  619. 

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

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

  622. }

  623. 

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

  625. {

  626.     ByteIOContext *pb = s->pb;

  627.     int i;

  628. 

  629.     if (type == MaterialPackage) {

  630.         mxf_write_metadata_key(pb, 0x013600);

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

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

  633.     } else {

  634.         mxf_write_metadata_key(pb, 0x013700);

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

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

  637.     }

  638. 

  639.     // write uid

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

  641.     mxf_write_uuid(pb, type, 0);

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

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

  644. 

  645.     // write package umid

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

  647.     mxf_write_umid(pb, type, 0);

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

  649. 

  650.     // write create date

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

  652.     put_be64(pb, 0);

  653. 

  654.     // write modified date

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

  656.     put_be64(pb, 0);

  657. 

  658.     // write track refs

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

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

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

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

  663. 

  664.     // write multiple descriptor reference

  665.     if (type == SourcePackage) {

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

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

  668.             mxf_write_uuid(pb, MultipleDescriptor, 0);

  669.             mxf_write_multi_descriptor(s);

  670.         } else

  671.             mxf_write_uuid(pb, SubDescriptor, 0);

  672.     }

  673. 

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

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

  676.         mxf_write_track(s, st, type);

  677.         mxf_write_sequence(s, st, type);

  678.         mxf_write_structural_component(s, st, type);

  679. 

  680.         if (type == SourcePackage) {

  681.             MXFStreamContext *sc = st->priv_data;

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

  683.         }

  684.     }

  685. }

  686. 

  687. static int mxf_write_essence_container_data(AVFormatContext *s)

  688. {

  689.     ByteIOContext *pb = s->pb;

  690. 

  691.     mxf_write_metadata_key(pb, 0x012300);

  692.     klv_encode_ber_length(pb, 64);

  693. 

  694.     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID

  695.     mxf_write_uuid(pb, EssenceContainerData, 0);

  696. 

  697.     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID

  698.     mxf_write_umid(pb, SourcePackage, 0);

  699. 

  700.     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID

  701.     put_be32(pb, 1);

  702. 

  703.     return 0;

  704. }

  705. 

  706. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  707. {

  708.     mxf_write_preface(s);

  709.     mxf_write_identification(s);

  710.     mxf_write_content_storage(s);

  711.     mxf_write_package(s, MaterialPackage);

  712.     mxf_write_package(s, SourcePackage);

  713.     mxf_write_essence_container_data(s);

  714.     return 0;

  715. }

  716. 

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

  718. {

  719.     MXFContext *mxf = s->priv_data;

  720.     ByteIOContext *pb = s->pb;

  721.     int64_t header_byte_count_offset;

  722. 

  723.     // write klv

  724.     put_buffer(pb, key, 16);

  725. 

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

  727. 

  728.     // write partition value

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

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

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

  732. 

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

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

  735. 

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

  737. 

  738.     // set offset

  739.     header_byte_count_offset = url_ftell(pb);

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

  741. 

  742.     // no indexTable

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

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

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

  746. 

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

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

  749. 

  750.     // essence container

  751.     mxf_write_essence_container_refs(s);

  752. 

  753.     if (write_metadata) {

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

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

  756.         mxf_write_primer_pack(s);

  757.         mxf_write_header_metadata_sets(s);

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

  759.         // update header_byte_count

  760.         url_fseek(pb, header_byte_count_offset, SEEK_SET);

  761.         put_be64(pb, pos - start);

  762.         url_fseek(pb, pos, SEEK_SET);

  763.     }

  764. 

  765.     put_flush_packet(pb);

  766. }

  767. 

  768. static const UID mxf_mpeg2_codec_uls[] = {

  769.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame

  770.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP

  771.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame

  772.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP

  773.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame

  774.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP

  775.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame

  776.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP

  777. };

  778. 

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

  780. {

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

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

  783.             return avctx->gop_size ?

  784.                 &mxf_mpeg2_codec_uls[1] :

  785.                 &mxf_mpeg2_codec_uls[0];

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

  787.             return avctx->gop_size ?

  788.                 &mxf_mpeg2_codec_uls[5] :

  789.                 &mxf_mpeg2_codec_uls[4];

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

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

  792.             return avctx->gop_size ?

  793.                 &mxf_mpeg2_codec_uls[3] :

  794.                 &mxf_mpeg2_codec_uls[2];

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

  796.             return avctx->gop_size ?

  797.                 &mxf_mpeg2_codec_uls[7] :

  798.                 &mxf_mpeg2_codec_uls[6];

  799.     }

  800.     return NULL;

  801. }

  802. 

  803. static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  804. {

  805.     MXFStreamContext *sc = st->priv_data;

  806.     uint32_t c = -1;

  807.     int i;

  808. 

  809.     for(i = 0; i < pkt->size - 4; i++) {

  810.         c = (c<<8) + pkt->data[i];

  811.         if (c == 0x1B5) {

  812.             if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext

  813.                 st->codec->profile = pkt->data[i+1] & 0x07;

  814.                 st->codec->level   = pkt->data[i+2] >> 4;

  815.             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext

  816.                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame

  817.                 break;

  818.             }

  819.         }

  820.     }

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

  822.     return !!sc->codec_ul;

  823. }

  824. 

  825. static int ff_audio_interleave_init(AVFormatContext *s, const int *samples_per_frame)

  826. {

  827.     int i;

  828. 

  829.     if (!samples_per_frame)

  830.         samples_per_frame = PAL_samples_per_frame;

  831. 

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

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

  834.         AudioInterleaveContext *aic = st->priv_data;

  835. 

  836.         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {

  837.             aic->sample_size = (st->codec->channels *

  838.                                 av_get_bits_per_sample(st->codec->codec_id)) / 8;

  839.             if (!aic->sample_size) {

  840.                 av_log(s, AV_LOG_ERROR, "could not compute sample size\n");

  841.                 return -1;

  842.             }

  843.             aic->samples_per_frame = samples_per_frame;

  844.             aic->samples = aic->samples_per_frame;

  845. 

  846.             av_fifo_init(&aic->fifo, 100 * *aic->samples);

  847.         }

  848.     }

  849. 

  850.     return 0;

  851. }

  852. 

  853. static int mxf_write_header(AVFormatContext *s)

  854. {

  855.     MXFContext *mxf = s->priv_data;

  856.     int i;

  857.     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};

  858.     const int *samples_per_frame = NULL;

  859. 

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

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

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

  863.         if (!sc)

  864.             return AVERROR(ENOMEM);

  865.         st->priv_data = sc;

  866. 

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

  868.             if (!av_cmp_q(st->codec->time_base, (AVRational){ 1, 25 })) {

  869.                 samples_per_frame = PAL_samples_per_frame;

  870.                 mxf->time_base = (AVRational){ 1, 25 };

  871.             } else if (!av_cmp_q(st->codec->time_base, (AVRational){ 1001, 30000 })) {

  872.                 samples_per_frame = NTSC_samples_per_frame;

  873.                 mxf->time_base = (AVRational){ 1001, 30000 };

  874.             } else {

  875.                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");

  876.                 return -1;

  877.             }

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

  879.             if (st->codec->sample_rate != 48000) {

  880.                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");

  881.                 return -1;

  882.             }

  883.         }

  884.         sc->duration = -1;

  885. 

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

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

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

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

  890.             return -1;

  891.         }

  892. 

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

  894. 

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

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

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

  898.         } else

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

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

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

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

  903.     }

  904. 

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

  906.         MXFStreamContext *sc = s->streams[i]->priv_data;

  907.         av_set_pts_info(s->streams[i], 64, mxf->time_base.num, mxf->time_base.den);

  908.         // update element count

  909.         sc->track_essence_element_key[13] = present[sc->index];

  910.         sc->order = AV_RB32(sc->track_essence_element_key+12);

  911.     }

  912. 

  913.     if (ff_audio_interleave_init(s, samples_per_frame) < 0)

  914.         return -1;

  915. 

  916.     return 0;

  917. }

  918. 

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

  920. {

  921.     MXFContext *mxf = s->priv_data;

  922.     ByteIOContext *pb = s->pb;

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

  924.     MXFStreamContext *sc = st->priv_data;

  925. 

  926.     if (!mxf->header_written) {

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

  928.             if (!mxf_parse_mpeg2_frame(s, st, pkt)) {

  929.                 av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");

  930.                 return -1;

  931.             }

  932.         }

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

  934.         mxf->header_written = 1;

  935.     }

  936. 

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

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

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

  940. 

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

  942. 

  943.     put_flush_packet(pb);

  944.     return 0;

  945. }

  946. 

  947. static int mxf_write_footer(AVFormatContext *s)

  948. {

  949.     MXFContext *mxf = s->priv_data;

  950.     ByteIOContext *pb = s->pb;

  951. 

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

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

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

  955.         url_fseek(pb, 0, SEEK_SET);

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

  957.     }

  958.     mxf_free(s);

  959.     return 0;

  960. }

  961. 

  962. static int mxf_interleave_new_audio_packet(AVFormatContext *s, AVPacket *pkt,

  963.                                            int stream_index, int flush)

  964. {

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

  966.     AudioInterleaveContext *aic = st->priv_data;

  967. 

  968.     int size = FFMIN(av_fifo_size(&aic->fifo), *aic->samples * aic->sample_size);

  969.     if (!size || (!flush && size == av_fifo_size(&aic->fifo)))

  970.         return 0;

  971. 

  972.     av_new_packet(pkt, size);

  973.     av_fifo_read(&aic->fifo, pkt->data, size);

  974. 

  975.     pkt->dts = pkt->pts = aic->dts;

  976.     pkt->duration = av_rescale_q(*aic->samples,

  977.                                  (AVRational){ 1, st->codec->sample_rate },

  978.                                  st->time_base);

  979.     pkt->stream_index = stream_index;

  980.     aic->dts += pkt->duration;

  981. 

  982.     aic->samples++;

  983.     if (!*aic->samples)

  984.         aic->samples = aic->samples_per_frame;

  985. 

  986.     return size;

  987. }

  988. 

  989. static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, int flush)

  990. {

  991.     AVPacketList *pktl;

  992.     int stream_count = 0;

  993.     int streams[MAX_STREAMS];

  994. 

  995.     memset(streams, 0, sizeof(streams));

  996.     pktl = s->packet_buffer;

  997.     while (pktl) {

  998.         //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);

  999.         if (!streams[pktl->pkt.stream_index])

  1000.             stream_count++;

  1001.         streams[pktl->pkt.stream_index]++;

  1002.         pktl = pktl->next;

  1003.     }

  1004. 

  1005.     if (stream_count && (s->nb_streams == stream_count || flush)) {

  1006.         pktl = s->packet_buffer;

  1007.         *out = pktl->pkt;

  1008.         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);

  1009.         s->packet_buffer = pktl->next;

  1010.         av_freep(&pktl);

  1011. 

  1012.         if (flush && stream_count < s->nb_streams) {

  1013.             // purge packet queue

  1014.             pktl = s->packet_buffer;

  1015.             while (pktl) {

  1016.                 AVPacketList *next = pktl->next;

  1017.                 av_free_packet(&pktl->pkt);

  1018.                 av_freep(&pktl);

  1019.                 pktl = next;

  1020.             }

  1021.             s->packet_buffer = NULL;

  1022.         }

  1023. 

  1024.         return 1;

  1025.     } else {

  1026.         av_init_packet(out);

  1027.         return 0;

  1028.     }

  1029. }

  1030. 

  1031. static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)

  1032. {

  1033.     AVStream *st  = s->streams[pkt ->stream_index];

  1034.     AVStream *st2 = s->streams[next->stream_index];

  1035.     MXFStreamContext *sc  = st ->priv_data;

  1036.     MXFStreamContext *sc2 = st2->priv_data;

  1037. 

  1038.     int64_t left  = st2->time_base.num * (int64_t)st ->time_base.den;

  1039.     int64_t right = st ->time_base.num * (int64_t)st2->time_base.den;

  1040. 

  1041.     return next->dts * left > pkt->dts * right || // FIXME this can overflow

  1042.         (next->dts * left == pkt->dts * right && sc->order < sc2->order);

  1043. }

  1044. 

  1045. static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  1046. {

  1047.     int i;

  1048. 

  1049.     if (pkt) {

  1050.         AVStream *st = s->streams[pkt->stream_index];

  1051.         AudioInterleaveContext *aic = st->priv_data;

  1052.         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {

  1053.             av_fifo_generic_write(&aic->fifo, pkt->data, pkt->size, NULL);

  1054.         } else {

  1055.             // rewrite pts and dts to be decoded time line position

  1056.             pkt->pts = pkt->dts = aic->dts;

  1057.             aic->dts += pkt->duration;

  1058.             ff_interleave_add_packet(s, pkt, mxf_compare_timestamps);

  1059.         }

  1060.     }

  1061. 

  1062.     for (i = 0; i < s->nb_streams; i++) {

  1063.         AVStream *st = s->streams[i];

  1064.         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {

  1065.             AVPacket new_pkt;

  1066.             while (mxf_interleave_new_audio_packet(s, &new_pkt, i, flush))

  1067.                 ff_interleave_add_packet(s, &new_pkt, mxf_compare_timestamps);

  1068.         }

  1069.     }

  1070. 

  1071.     return mxf_interleave_get_packet(s, out, flush);

  1072. }

  1073. 

  1074. AVOutputFormat mxf_muxer = {

  1075.     "mxf",

  1076.     NULL_IF_CONFIG_SMALL("Material eXchange Format"),

  1077.     NULL,

  1078.     "mxf",

  1079.     sizeof(MXFContext),

  1080.     CODEC_ID_PCM_S16LE,

  1081.     CODEC_ID_MPEG2VIDEO,

  1082.     mxf_write_header,

  1083.     mxf_write_packet,

  1084.     mxf_write_footer,

  1085.     0,

  1086.     NULL,

  1087.     mxf_interleave,

  1088. };

  1089.