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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.  * Copyright (c) 2008 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

  8.  * FFmpeg is free software; you can redistribute it and/or

  9.  * modify it under the terms of the GNU Lesser General Public

  10.  * License as published by the Free Software Foundation; either

  11.  * version 2.1 of the License, or (at your option) any later version.

  12.  *

  13.  * FFmpeg is distributed in the hope that it will be useful,

  14.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  16.  * Lesser General Public License for more details.

  17.  *

  18.  * You should have received a copy of the GNU Lesser General Public

  19.  * License along with FFmpeg; if not, write to the Free Software

  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  21.  */

  22. 

  23. /*

  24.  * References

  25.  * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value

  26.  * SMPTE 377M MXF File Format Specifications

  27.  * SMPTE 379M MXF Generic Container

  28.  * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container

  29.  * SMPTE RP210: SMPTE Metadata Dictionary

  30.  * SMPTE RP224: Registry of SMPTE Universal Labels

  31.  */

  32. 

  33. //#define DEBUG

  34. 

  35. #include <math.h>

  36. #include <time.h>

  37. 

  38. #include "libavutil/fifo.h"

  39. #include "libavcodec/bytestream.h"

  40. #include "audiointerleave.h"

  41. #include "avformat.h"

  42. #include "mxf.h"

  43. 

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

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

  46. 

  47. AVOutputFormat mxf_d10_muxer;

  48. 

  49. #define EDIT_UNITS_PER_BODY 250

  50. #define KAG_SIZE 512

  51. 

  52. typedef struct {

  53.     int local_tag;

  54.     UID uid;

  55. } MXFLocalTagPair;

  56. 

  57. typedef struct {

  58.     uint8_t flags;

  59.     uint64_t offset;

  60.     unsigned slice_offset; ///< offset of audio slice

  61. } MXFIndexEntry;

  62. 

  63. typedef struct {

  64.     AudioInterleaveContext aic;

  65.     UID track_essence_element_key;

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

  67.     const UID *codec_ul;

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

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

  70.     int temporal_reordering;

  71. } MXFStreamContext;

  72. 

  73. typedef struct {

  74.     UID container_ul;

  75.     UID element_ul;

  76.     UID codec_ul;

  77.     void (*write_desc)();

  78. } MXFContainerEssenceEntry;

  79. 

  80. static const struct {

  81.     enum CodecID id;

  82.     int index;

  83. } mxf_essence_mappings[] = {

  84.     { CODEC_ID_MPEG2VIDEO, 0 },

  85.     { CODEC_ID_PCM_S24LE,  1 },

  86.     { CODEC_ID_PCM_S16LE,  1 },

  87.     { 0 }

  88. };

  89. 

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

  91. static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st);

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

  93. static void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st);

  94. static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st);

  95. 

  96. static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {

  97.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },

  98.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  99.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },

  100.       mxf_write_mpegvideo_desc },

  101.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },

  102.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },

  103.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  104.       mxf_write_aes3_desc },

  105.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },

  106.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },

  107.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  108.       mxf_write_wav_desc },

  109.     // D-10 625/50 PAL 50mb/s

  110.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },

  111.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

  112.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 },

  113.       mxf_write_cdci_desc },

  114.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },

  115.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  116.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  117.       mxf_write_generic_sound_desc },

  118.     // D-10 525/60 NTSC 50mb/s

  119.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },

  120.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

  121.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x02 },

  122.       mxf_write_cdci_desc },

  123.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },

  124.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  125.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  126.       mxf_write_generic_sound_desc },

  127.     // D-10 625/50 PAL 40mb/s

  128.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },

  129.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

  130.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x03 },

  131.       mxf_write_cdci_desc },

  132.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },

  133.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  134.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  135.       mxf_write_generic_sound_desc },

  136.     // D-10 525/60 NTSC 40mb/s

  137.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },

  138.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

  139.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x04 },

  140.       mxf_write_cdci_desc },

  141.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },

  142.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  143.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  144.       mxf_write_generic_sound_desc },

  145.     // D-10 625/50 PAL 30mb/s

  146.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },

  147.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

  148.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 },

  149.       mxf_write_cdci_desc },

  150.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },

  151.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  152.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  153.       mxf_write_generic_sound_desc },

  154.     // D-10 525/60 NTSC 30mb/s

  155.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },

  156.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

  157.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x06 },

  158.       mxf_write_cdci_desc },

  159.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },

  160.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  161.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  162.       mxf_write_generic_sound_desc },

  163.     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  164.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  165.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  166.       NULL },

  167. };

  168. 

  169. typedef struct MXFContext {

  170.     int64_t footer_partition_offset;

  171.     int essence_container_count;

  172.     AVRational time_base;

  173.     int header_written;

  174.     MXFIndexEntry *index_entries;

  175.     unsigned edit_units_count;

  176.     uint64_t timestamp;   ///< timestamp, as year(16),month(8),day(8),hour(8),minutes(8),msec/4(8)

  177.     uint8_t slice_count;  ///< index slice count minus 1 (1 if no audio, 0 otherwise)

  178.     int last_indexed_edit_unit;

  179.     uint64_t *body_partition_offset;

  180.     unsigned body_partitions_count;

  181.     int last_key_index;  ///< index of last key frame

  182.     uint64_t duration;

  183.     AVStream *timecode_track;

  184.     int timecode_base;       ///< rounded time code base (25 or 30)

  185.     int timecode_start;      ///< frame number computed from mpeg-2 gop header timecode

  186.     int timecode_drop_frame; ///< time code use drop frame method frop mpeg-2 essence gop header

  187.     int edit_unit_byte_count; ///< fixed edit unit byte count

  188.     uint64_t body_offset;

  189. } MXFContext;

  190. 

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

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

  193. 

  194. /**

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

  196.  */

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

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

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

  200. static const uint8_t index_table_segment_key[]     = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 };

  201. static const uint8_t random_index_pack_key[]       = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };

  202. 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

  203. 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

  204. static const uint8_t klv_fill_key[]                = { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x03,0x01,0x02,0x10,0x01,0x00,0x00,0x00 };

  205. static const uint8_t body_partition_key[]          = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }; // ClosedComplete

  206. 

  207. /**

  208.  * partial key for header metadata

  209.  */

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

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

  212. 

  213. /**

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

  215.  */

  216. static const MXFLocalTagPair mxf_local_tag_batch[] = {

  217.     // preface set

  218.     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */

  219.     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */

  220.     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */

  221.     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */

  222.     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */

  223.     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */

  224.     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */

  225.     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */

  226.     // Identification

  227.     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */

  228.     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */

  229.     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */

  230.     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */

  231.     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */

  232.     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */

  233.     // Content Storage

  234.     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */

  235.     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */

  236.     // Essence Container Data

  237.     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */

  238.     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */

  239.     // Package

  240.     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */

  241.     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */

  242.     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */

  243.     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */

  244.     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */

  245.     // Track

  246.     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */

  247.     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */

  248.     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */

  249.     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */

  250.     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */

  251.     // Sequence

  252.     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */

  253.     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */

  254.     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */

  255.     // Source Clip

  256.     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */

  257.     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */

  258.     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */

  259.     // Timecode Component

  260.     { 0x1501, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x05,0x00,0x00}}, /* Start Time Code */

  261.     { 0x1502, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x04,0x01,0x01,0x02,0x06,0x00,0x00}}, /* Rounded Time Code Base */

  262.     { 0x1503, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x04,0x01,0x01,0x05,0x00,0x00,0x00}}, /* Drop Frame */

  263.     // File Descriptor

  264.     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */

  265.     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */

  266.     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */

  267.     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */

  268.     // Generic Picture Essence Descriptor

  269.     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */

  270.     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */

  271.     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */

  272.     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */

  273.     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */

  274.     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */

  275.     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */

  276.     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */

  277.     // CDCI Picture Essence Descriptor

  278.     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */

  279.     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */

  280.     // Generic Sound Essence Descriptor

  281.     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */

  282.     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */

  283.     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */

  284.     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */

  285.     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */

  286.     // Index Table Segment

  287.     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */

  288.     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */

  289.     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */

  290.     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */

  291.     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */

  292.     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */

  293.     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */

  294.     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */

  295.     // MPEG video Descriptor

  296.     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */

  297.     // Wave Audio Essence Descriptor

  298.     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */

  299.     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */

  300. };

  301. 

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

  303. {

  304.     put_buffer(pb, uuid_base, 12);

  305.     put_be16(pb, type);

  306.     put_be16(pb, value);

  307. }

  308. 

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

  310. {

  311.     put_buffer(pb, umid_base, 16);

  312.     mxf_write_uuid(pb, type, value);

  313. }

  314. 

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

  316. {

  317.     put_be32(pb, ref_count);

  318.     put_be32(pb, 16);

  319. }

  320. 

  321. static int klv_ber_length(uint64_t len)

  322. {

  323.     if (len < 128)

  324.         return 1;

  325.     else

  326.         return (av_log2(len) >> 3) + 2;

  327. }

  328. 

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

  330. {

  331.     // Determine the best BER size

  332.     int size;

  333.     if (len < 128) {

  334.         //short form

  335.         put_byte(pb, len);

  336.         return 1;

  337.     }

  338. 

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

  340. 

  341.     // long form

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

  343.     while(size) {

  344.         size--;

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

  346.     }

  347.     return 0;

  348. }

  349. 

  350. static void klv_encode_ber4_length(ByteIOContext *pb, int len)

  351. {

  352.     put_byte(pb, 0x80 + 3);

  353.     put_be24(pb, len);

  354. }

  355. 

  356. /*

  357.  * Get essence container ul index

  358.  */

  359. static int mxf_get_essence_container_ul_index(enum CodecID id)

  360. {

  361.     int i;

  362.     for (i = 0; mxf_essence_mappings[i].id; i++)

  363.         if (mxf_essence_mappings[i].id == id)

  364.             return mxf_essence_mappings[i].index;

  365.     return -1;

  366. }

  367. 

  368. static void mxf_write_primer_pack(AVFormatContext *s)

  369. {

  370.     ByteIOContext *pb = s->pb;

  371.     int local_tag_number, i = 0;

  372. 

  373.     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);

  374. 

  375.     put_buffer(pb, primer_pack_key, 16);

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

  377. 

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

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

  380. 

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

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

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

  384.     }

  385. }

  386. 

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

  388. {

  389.     put_be16(pb, tag);

  390.     put_be16(pb, size);

  391. }

  392. 

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

  394. {

  395.     put_buffer(pb, header_metadata_key, 13);

  396.     put_be24(pb, value);

  397. }

  398. 

  399. static void mxf_free(AVFormatContext *s)

  400. {

  401.     int i;

  402. 

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

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

  405.         av_freep(&st->priv_data);

  406.     }

  407. }

  408. 

  409. static const MXFCodecUL *mxf_get_data_definition_ul(int type)

  410. {

  411.     const MXFCodecUL *uls = ff_mxf_data_definition_uls;

  412.     while (uls->uid[0]) {

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

  414.             break;

  415.         uls++;

  416.     }

  417.     return uls;

  418. }

  419. 

  420. static void mxf_write_essence_container_refs(AVFormatContext *s)

  421. {

  422.     MXFContext *c = s->priv_data;

  423.     ByteIOContext *pb = s->pb;

  424.     int i;

  425. 

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

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

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

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

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

  431.     }

  432. }

  433. 

  434. static void mxf_write_preface(AVFormatContext *s)

  435. {

  436.     MXFContext *mxf = s->priv_data;

  437.     ByteIOContext *pb = s->pb;

  438. 

  439.     mxf_write_metadata_key(pb, 0x012f00);

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

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

  442. 

  443.     // write preface set uid

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

  445.     mxf_write_uuid(pb, Preface, 0);

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

  447. 

  448.     // last modified date

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

  450.     put_be64(pb, mxf->timestamp);

  451. 

  452.     // write version

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

  454.     put_be16(pb, 1);

  455. 

  456.     // write identification_refs

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

  458.     mxf_write_refs_count(pb, 1);

  459.     mxf_write_uuid(pb, Identification, 0);

  460. 

  461.     // write content_storage_refs

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

  463.     mxf_write_uuid(pb, ContentStorage, 0);

  464. 

  465.     // operational pattern

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

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

  468.         put_buffer(pb, op1a_ul, 14);

  469.         put_be16(pb, 0x0900); // multi track

  470.     } else {

  471.         put_buffer(pb, op1a_ul, 16);

  472.     }

  473. 

  474.     // write essence_container_refs

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

  476.     mxf_write_essence_container_refs(s);

  477. 

  478.     // write dm_scheme_refs

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

  480.     put_be64(pb, 0);

  481. }

  482. 

  483. /*

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

  485.  */

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

  487. {

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

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

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

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

  492. }

  493. 

  494. static void mxf_write_identification(AVFormatContext *s)

  495. {

  496.     MXFContext *mxf = s->priv_data;

  497.     ByteIOContext *pb = s->pb;

  498.     const char *company = "FFmpeg";

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

  500.     const char *version;

  501.     int length;

  502. 

  503.     mxf_write_metadata_key(pb, 0x013000);

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

  505. 

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

  507.         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);

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

  509.     klv_encode_ber_length(pb, length);

  510. 

  511.     // write uid

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

  513.     mxf_write_uuid(pb, Identification, 0);

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

  515. 

  516.     // write generation uid

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

  518.     mxf_write_uuid(pb, Identification, 1);

  519. 

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

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

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

  523. 

  524.     // write product uid

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

  526.     mxf_write_uuid(pb, Identification, 2);

  527. 

  528.     // modification date

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

  530.     put_be64(pb, mxf->timestamp);

  531. }

  532. 

  533. static void mxf_write_content_storage(AVFormatContext *s)

  534. {

  535.     ByteIOContext *pb = s->pb;

  536. 

  537.     mxf_write_metadata_key(pb, 0x011800);

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

  539.     klv_encode_ber_length(pb, 92);

  540. 

  541.     // write uid

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

  543.     mxf_write_uuid(pb, ContentStorage, 0);

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

  545. 

  546.     // write package reference

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

  548.     mxf_write_refs_count(pb, 2);

  549.     mxf_write_uuid(pb, MaterialPackage, 0);

  550.     mxf_write_uuid(pb, SourcePackage, 0);

  551. 

  552.     // write essence container data

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

  554.     mxf_write_refs_count(pb, 1);

  555.     mxf_write_uuid(pb, EssenceContainerData, 0);

  556. }

  557. 

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

  559. {

  560.     MXFContext *mxf = s->priv_data;

  561.     ByteIOContext *pb = s->pb;

  562.     MXFStreamContext *sc = st->priv_data;

  563. 

  564.     mxf_write_metadata_key(pb, 0x013b00);

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

  566.     klv_encode_ber_length(pb, 80);

  567. 

  568.     // write track uid

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

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

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

  572. 

  573.     // write track id

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

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

  576. 

  577.     // write track number

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

  579.     if (type == MaterialPackage)

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

  581.     else

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

  583. 

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

  585.     put_be32(pb, mxf->time_base.den);

  586.     put_be32(pb, mxf->time_base.num);

  587. 

  588.     // write origin

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

  590.     put_be64(pb, 0);

  591. 

  592.     // write sequence refs

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

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

  595. }

  596. 

  597. static const uint8_t smpte_12m_timecode_track_data_ul[] = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x01,0x01,0x00,0x00,0x00 };

  598. 

  599. static void mxf_write_common_fields(AVFormatContext *s, AVStream *st)

  600. {

  601.     MXFContext *mxf = s->priv_data;

  602.     ByteIOContext *pb = s->pb;

  603. 

  604.     // find data define uls

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

  606.     if (st == mxf->timecode_track)

  607.         put_buffer(pb, smpte_12m_timecode_track_data_ul, 16);

  608.     else {

  609.         const MXFCodecUL *data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);

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

  611.     }

  612. 

  613.     // write duration

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

  615.     put_be64(pb, mxf->duration);

  616. }

  617. 

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

  619. {

  620.     MXFContext *mxf = s->priv_data;

  621.     ByteIOContext *pb = s->pb;

  622.     enum MXFMetadataSetType component;

  623. 

  624.     mxf_write_metadata_key(pb, 0x010f00);

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

  626.     klv_encode_ber_length(pb, 80);

  627. 

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

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

  630. 

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

  632.     mxf_write_common_fields(s, st);

  633. 

  634.     // write structural component

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

  636.     mxf_write_refs_count(pb, 1);

  637.     if (st == mxf->timecode_track)

  638.         component = TimecodeComponent;

  639.     else if (type == MaterialPackage)

  640.         component = SourceClip;

  641.     else

  642.         component = SourceClip+TypeBottom;

  643.     mxf_write_uuid(pb, component, st->index);

  644. }

  645. 

  646. static void mxf_write_timecode_component(AVFormatContext *s, AVStream *st)

  647. {

  648.     MXFContext *mxf = s->priv_data;

  649.     ByteIOContext *pb = s->pb;

  650. 

  651.     mxf_write_metadata_key(pb, 0x011400);

  652.     klv_encode_ber_length(pb, 75);

  653. 

  654.     // UID

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

  656.     mxf_write_uuid(pb, TimecodeComponent, st->index);

  657. 

  658.     mxf_write_common_fields(s, st);

  659. 

  660.     // Start Time Code

  661.     mxf_write_local_tag(pb, 8, 0x1501);

  662.     put_be64(pb, mxf->timecode_start);

  663. 

  664.     // Rounded Time Code Base

  665.     mxf_write_local_tag(pb, 2, 0x1502);

  666.     put_be16(pb, mxf->timecode_base);

  667. 

  668.     // Drop Frame

  669.     mxf_write_local_tag(pb, 1, 0x1503);

  670.     put_byte(pb, mxf->timecode_drop_frame);

  671. }

  672. 

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

  674. {

  675.     ByteIOContext *pb = s->pb;

  676.     int i;

  677. 

  678.     mxf_write_metadata_key(pb, 0x011100);

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

  680.     klv_encode_ber_length(pb, 108);

  681. 

  682.     // write uid

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

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

  685. 

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

  687.     mxf_write_common_fields(s, st);

  688. 

  689.     // write start_position

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

  691.     put_be64(pb, 0);

  692. 

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

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

  695.     if (type == SourcePackage) {

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

  697.             put_be64(pb, 0);

  698.     } else

  699.         mxf_write_umid(pb, SourcePackage, 0);

  700. 

  701.     // write source track id

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

  703.     if (type == SourcePackage)

  704.         put_be32(pb, 0);

  705.     else

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

  707. }

  708. 

  709. static void mxf_write_multi_descriptor(AVFormatContext *s)

  710. {

  711.     MXFContext *mxf = s->priv_data;

  712.     ByteIOContext *pb = s->pb;

  713.     const uint8_t *ul;

  714.     int i;

  715. 

  716.     mxf_write_metadata_key(pb, 0x014400);

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

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

  719. 

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

  721.     mxf_write_uuid(pb, MultipleDescriptor, 0);

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

  723. 

  724.     // write sample rate

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

  726.     put_be32(pb, mxf->time_base.den);

  727.     put_be32(pb, mxf->time_base.num);

  728. 

  729.     // write essence container ul

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

  731.     if (mxf->essence_container_count > 1)

  732.         ul = multiple_desc_ul;

  733.     else {

  734.         MXFStreamContext *sc = s->streams[0]->priv_data;

  735.         ul = mxf_essence_container_uls[sc->index].container_ul;

  736.     }

  737.     put_buffer(pb, ul, 16);

  738. 

  739.     // write sub descriptor refs

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

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

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

  743.         mxf_write_uuid(pb, SubDescriptor, i);

  744. }

  745. 

  746. static void mxf_write_generic_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)

  747. {

  748.     MXFContext *mxf = s->priv_data;

  749.     MXFStreamContext *sc = st->priv_data;

  750.     ByteIOContext *pb = s->pb;

  751. 

  752.     put_buffer(pb, key, 16);

  753.     klv_encode_ber_length(pb, size);

  754. 

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

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

  757. 

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

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

  760. 

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

  762.     put_be32(pb, mxf->time_base.den);

  763.     put_be32(pb, mxf->time_base.num);

  764. 

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

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

  767. }

  768. 

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

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

  771. static const UID mxf_aes3_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 };

  772. static const UID mxf_cdci_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x28,0x00 };

  773. static const UID mxf_generic_sound_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x42,0x00 };

  774. 

  775. static void mxf_write_cdci_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)

  776. {

  777.     MXFStreamContext *sc = st->priv_data;

  778.     ByteIOContext *pb = s->pb;

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

  780.     int display_height;

  781.     AVRational dar;

  782.     int f1, f2;

  783. 

  784.     mxf_write_generic_desc(s, st, key, size);

  785. 

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

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

  788. 

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

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

  791. 

  792.     mxf_write_local_tag(pb, 4, 0x3209);

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

  794. 

  795.     if (st->codec->height == 608) // PAL + VBI

  796.         display_height = 576;

  797.     else if (st->codec->height == 512)  // NTSC + VBI

  798.         display_height = 486;

  799.     else

  800.         display_height = st->codec->height;

  801. 

  802.     mxf_write_local_tag(pb, 4, 0x3208);

  803.     put_be32(pb, display_height>>sc->interlaced);

  804. 

  805.     // component depth

  806.     mxf_write_local_tag(pb, 4, 0x3301);

  807.     put_be32(pb, 8);

  808. 

  809.     // horizontal subsampling

  810.     mxf_write_local_tag(pb, 4, 0x3302);

  811.     put_be32(pb, 2);

  812. 

  813.     // frame layout

  814.     mxf_write_local_tag(pb, 1, 0x320C);

  815.     put_byte(pb, sc->interlaced);

  816. 

  817.     // video line map

  818.     switch (st->codec->height) {

  819.     case  576: f1 = 23; f2 = 336; break;

  820.     case  608: f1 =  7; f2 = 320; break;

  821.     case  480: f1 = 20; f2 = 283; break;

  822.     case  512: f1 =  7; f2 = 270; break;

  823.     case  720: f1 = 26; f2 =   0; break; // progressive

  824.     case 1080: f1 = 21; f2 = 584; break;

  825.     default:   f1 =  0; f2 =   0; break;

  826.     }

  827. 

  828.     if (!sc->interlaced) {

  829.         f2  = 0;

  830.         f1 *= 2;

  831.     }

  832. 

  833.     mxf_write_local_tag(pb, 12+sc->interlaced*4, 0x320D);

  834.     put_be32(pb, sc->interlaced ? 2 : 1);

  835.     put_be32(pb, 4);

  836.     put_be32(pb, f1);

  837.     if (sc->interlaced)

  838.         put_be32(pb, f2);

  839. 

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

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

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

  843.               1024*1024);

  844. 

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

  846.     put_be32(pb, dar.num);

  847.     put_be32(pb, dar.den);

  848. 

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

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

  851. }

  852. 

  853. static void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st)

  854. {

  855.     MXFStreamContext *sc = st->priv_data;

  856.     mxf_write_cdci_common(s, st, mxf_cdci_descriptor_key, 161+sc->interlaced*4);

  857. }

  858. 

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

  860. {

  861.     MXFStreamContext *sc = st->priv_data;

  862.     ByteIOContext *pb = s->pb;

  863. 

  864.     mxf_write_cdci_common(s, st, mxf_mpegvideo_descriptor_key, 169+sc->interlaced*4);

  865. 

  866.     // bit rate

  867.     mxf_write_local_tag(pb, 4, 0x8000);

  868.     put_be32(pb, st->codec->bit_rate);

  869. }

  870. 

  871. static void mxf_write_generic_sound_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)

  872. {

  873.     ByteIOContext *pb = s->pb;

  874. 

  875.     mxf_write_generic_desc(s, st, key, size);

  876. 

  877.     // audio locked

  878.     mxf_write_local_tag(pb, 1, 0x3D02);

  879.     put_byte(pb, 1);

  880. 

  881.     // write audio sampling rate

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

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

  884.     put_be32(pb, 1);

  885. 

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

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

  888. 

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

  890.     put_be32(pb, av_get_bits_per_sample(st->codec->codec_id));

  891. }

  892. 

  893. static void mxf_write_wav_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)

  894. {

  895.     ByteIOContext *pb = s->pb;

  896. 

  897.     mxf_write_generic_sound_common(s, st, key, size);

  898. 

  899.     mxf_write_local_tag(pb, 2, 0x3D0A);

  900.     put_be16(pb, st->codec->block_align);

  901. 

  902.     // avg bytes per sec

  903.     mxf_write_local_tag(pb, 4, 0x3D09);

  904.     put_be32(pb, st->codec->block_align*st->codec->sample_rate);

  905. }

  906. 

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

  908. {

  909.     mxf_write_wav_common(s, st, mxf_wav_descriptor_key, 107);

  910. }

  911. 

  912. static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)

  913. {

  914.     mxf_write_wav_common(s, st, mxf_aes3_descriptor_key, 107);

  915. }

  916. 

  917. static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st)

  918. {

  919.     mxf_write_generic_sound_common(s, st, mxf_generic_sound_descriptor_key, 93);

  920. }

  921. 

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

  923. {

  924.     MXFContext *mxf = s->priv_data;

  925.     ByteIOContext *pb = s->pb;

  926.     int i, track_count;

  927. 

  928.     if (type == MaterialPackage) {

  929.         track_count = s->nb_streams + 1; // add timecode track

  930.         mxf_write_metadata_key(pb, 0x013600);

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

  932.         klv_encode_ber_length(pb, 92 + 16*track_count);

  933.     } else {

  934.         track_count = s->nb_streams;

  935.         mxf_write_metadata_key(pb, 0x013700);

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

  937.         klv_encode_ber_length(pb, 112 + 16*track_count); // 20 bytes length for descriptor reference

  938.     }

  939. 

  940.     // write uid

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

  942.     mxf_write_uuid(pb, type, 0);

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

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

  945. 

  946.     // write package umid

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

  948.     mxf_write_umid(pb, type, 0);

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

  950. 

  951.     // package creation date

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

  953.     put_be64(pb, mxf->timestamp);

  954. 

  955.     // package modified date

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

  957.     put_be64(pb, mxf->timestamp);

  958. 

  959.     // write track refs

  960.     mxf_write_local_tag(pb, track_count*16 + 8, 0x4403);

  961.     mxf_write_refs_count(pb, track_count);

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

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

  964.     if (type == MaterialPackage)

  965.         mxf_write_uuid(pb, Track, s->nb_streams); // timecode track

  966. 

  967.     // write multiple descriptor reference

  968.     if (type == SourcePackage) {

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

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

  971.             mxf_write_uuid(pb, MultipleDescriptor, 0);

  972.             mxf_write_multi_descriptor(s);

  973.         } else

  974.             mxf_write_uuid(pb, SubDescriptor, 0);

  975.     } else {

  976.         // write timecode track

  977.         mxf_write_track(s, mxf->timecode_track, type);

  978.         mxf_write_sequence(s, mxf->timecode_track, type);

  979.         mxf_write_timecode_component(s, mxf->timecode_track);

  980.     }

  981. 

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

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

  984.         mxf_write_track(s, st, type);

  985.         mxf_write_sequence(s, st, type);

  986.         mxf_write_structural_component(s, st, type);

  987. 

  988.         if (type == SourcePackage) {

  989.             MXFStreamContext *sc = st->priv_data;

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

  991.         }

  992.     }

  993. }

  994. 

  995. static int mxf_write_essence_container_data(AVFormatContext *s)

  996. {

  997.     ByteIOContext *pb = s->pb;

  998. 

  999.     mxf_write_metadata_key(pb, 0x012300);

  1000.     klv_encode_ber_length(pb, 72);

  1001. 

  1002.     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID

  1003.     mxf_write_uuid(pb, EssenceContainerData, 0);

  1004. 

  1005.     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID

  1006.     mxf_write_umid(pb, SourcePackage, 0);

  1007. 

  1008.     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID

  1009.     put_be32(pb, 1);

  1010. 

  1011.     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID

  1012.     put_be32(pb, 2);

  1013. 

  1014.     return 0;

  1015. }

  1016. 

  1017. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  1018. {

  1019.     mxf_write_preface(s);

  1020.     mxf_write_identification(s);

  1021.     mxf_write_content_storage(s);

  1022.     mxf_write_package(s, MaterialPackage);

  1023.     mxf_write_package(s, SourcePackage);

  1024.     mxf_write_essence_container_data(s);

  1025.     return 0;

  1026. }

  1027. 

  1028. static unsigned klv_fill_size(uint64_t size)

  1029. {

  1030.     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));

  1031.     if (pad < 20) // smallest fill item possible

  1032.         return pad + KAG_SIZE;

  1033.     else

  1034.         return pad & (KAG_SIZE-1);

  1035. }

  1036. 

  1037. static void mxf_write_index_table_segment(AVFormatContext *s)

  1038. {

  1039.     MXFContext *mxf = s->priv_data;

  1040.     ByteIOContext *pb = s->pb;

  1041.     int i, j;

  1042.     int temporal_reordering = 0;

  1043.     int key_index = mxf->last_key_index;

  1044. 

  1045.     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);

  1046. 

  1047.     if (!mxf->edit_units_count && !mxf->edit_unit_byte_count)

  1048.         return;

  1049. 

  1050.     put_buffer(pb, index_table_segment_key, 16);

  1051. 

  1052.     if (mxf->edit_unit_byte_count) {

  1053.         klv_encode_ber_length(pb, 85);

  1054.     } else {

  1055.         klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1)*6 +

  1056.                               12+mxf->edit_units_count*(11+mxf->slice_count*4));

  1057.     }

  1058. 

  1059.     // instance id

  1060.     mxf_write_local_tag(pb, 16, 0x3C0A);

  1061.     mxf_write_uuid(pb, IndexTableSegment, 0);

  1062. 

  1063.     // index edit rate

  1064.     mxf_write_local_tag(pb, 8, 0x3F0B);

  1065.     put_be32(pb, mxf->time_base.num);

  1066.     put_be32(pb, mxf->time_base.den);

  1067. 

  1068.     // index start position

  1069.     mxf_write_local_tag(pb, 8, 0x3F0C);

  1070.     put_be64(pb, mxf->last_indexed_edit_unit);

  1071. 

  1072.     // index duration

  1073.     mxf_write_local_tag(pb, 8, 0x3F0D);

  1074.     put_be64(pb, mxf->edit_units_count);

  1075. 

  1076.     // edit unit byte count

  1077.     mxf_write_local_tag(pb, 4, 0x3F05);

  1078.     put_be32(pb, mxf->edit_unit_byte_count);

  1079. 

  1080.     // index sid

  1081.     mxf_write_local_tag(pb, 4, 0x3F06);

  1082.     put_be32(pb, 2);

  1083. 

  1084.     // body sid

  1085.     mxf_write_local_tag(pb, 4, 0x3F07);

  1086.     put_be32(pb, 1);

  1087. 

  1088.     // real slice count - 1

  1089.     mxf_write_local_tag(pb, 1, 0x3F08);

  1090.     put_byte(pb, mxf->slice_count);

  1091. 

  1092.     if (!mxf->edit_unit_byte_count) {

  1093.         // delta entry array

  1094.         mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);

  1095.         put_be32(pb, s->nb_streams+1); // num of entries

  1096.         put_be32(pb, 6);               // size of one entry

  1097.         // write system item delta entry

  1098.         put_byte(pb, 0);

  1099.         put_byte(pb, 0); // slice entry

  1100.         put_be32(pb, 0); // element delta

  1101.         for (i = 0; i < s->nb_streams; i++) {

  1102.             AVStream *st = s->streams[i];

  1103.             MXFStreamContext *sc = st->priv_data;

  1104.             put_byte(pb, sc->temporal_reordering);

  1105.             if (sc->temporal_reordering)

  1106.                 temporal_reordering = 1;

  1107.             if (i == 0) { // video track

  1108.                 put_byte(pb, 0); // slice number

  1109.                 put_be32(pb, KAG_SIZE); // system item size including klv fill

  1110.             } else { // audio track

  1111.                 unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;

  1112.                 audio_frame_size += klv_fill_size(audio_frame_size);

  1113.                 put_byte(pb, 1);

  1114.                 put_be32(pb, (i-1)*audio_frame_size); // element delta

  1115.             }

  1116.         }

  1117. 

  1118.         mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);

  1119.         put_be32(pb, mxf->edit_units_count);  // num of entries

  1120.         put_be32(pb, 11+mxf->slice_count*4);  // size of one entry

  1121.         for (i = 0; i < mxf->edit_units_count; i++) {

  1122.             if (temporal_reordering) {

  1123.                 int temporal_offset = 0;

  1124.                 for (j = i+1; j < mxf->edit_units_count; j++) {

  1125.                     temporal_offset++;

  1126.                     if (mxf->index_entries[j].flags & 0x10) { // backward prediction

  1127.                         // next is not b, so is reordered

  1128.                         if (!(mxf->index_entries[i+1].flags & 0x10)) {

  1129.                             if ((mxf->index_entries[i].flags & 0x11) == 0) // i frame

  1130.                                 temporal_offset = 0;

  1131.                             else

  1132.                                 temporal_offset = -temporal_offset;

  1133.                         }

  1134.                         break;

  1135.                     }

  1136.                 }

  1137.                 put_byte(pb, temporal_offset);

  1138.             } else

  1139.                 put_byte(pb, 0);

  1140.             if (!(mxf->index_entries[i].flags & 0x33)) { // I frame

  1141.                 mxf->last_key_index = key_index;

  1142.                 key_index = i;

  1143.             }

  1144.             if (mxf->index_entries[i].flags & 0x10 && // backward prediction

  1145.                 !(mxf->index_entries[key_index].flags & 0x80)) { // open gop

  1146.                 put_byte(pb, mxf->last_key_index - i);

  1147.             } else {

  1148.                 put_byte(pb, key_index - i); // key frame offset

  1149.                 if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward

  1150.                     mxf->last_key_index = key_index;

  1151.             }

  1152.             put_byte(pb, mxf->index_entries[i].flags);

  1153.             // stream offset

  1154.             put_be64(pb, mxf->index_entries[i].offset);

  1155.             if (s->nb_streams > 1)

  1156.                 put_be32(pb, mxf->index_entries[i].slice_offset);

  1157.         }

  1158. 

  1159.         mxf->last_key_index = key_index - mxf->edit_units_count;

  1160.         mxf->last_indexed_edit_unit += mxf->edit_units_count;

  1161.         mxf->edit_units_count = 0;

  1162.     }

  1163. }

  1164. 

  1165. static void mxf_write_klv_fill(AVFormatContext *s)

  1166. {

  1167.     unsigned pad = klv_fill_size(url_ftell(s->pb));

  1168.     if (pad) {

  1169.         put_buffer(s->pb, klv_fill_key, 16);

  1170.         pad -= 16 + 4;

  1171.         klv_encode_ber4_length(s->pb, pad);

  1172.         for (; pad; pad--)

  1173.             put_byte(s->pb, 0);

  1174.         assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));

  1175.     }

  1176. }

  1177. 

  1178. static void mxf_write_partition(AVFormatContext *s, int bodysid,

  1179.                                 int indexsid,

  1180.                                 const uint8_t *key, int write_metadata)

  1181. {

  1182.     MXFContext *mxf = s->priv_data;

  1183.     ByteIOContext *pb = s->pb;

  1184.     int64_t header_byte_count_offset;

  1185.     unsigned index_byte_count = 0;

  1186.     uint64_t partition_offset = url_ftell(pb);

  1187. 

  1188.     if (!mxf->edit_unit_byte_count && mxf->edit_units_count)

  1189.         index_byte_count = 85 + 12+(s->nb_streams+1)*6 +

  1190.             12+mxf->edit_units_count*(11+mxf->slice_count*4);

  1191.     else if (mxf->edit_unit_byte_count && indexsid)

  1192.         index_byte_count = 85;

  1193. 

  1194.     if (index_byte_count) {

  1195.         // add encoded ber length

  1196.         index_byte_count += 16 + klv_ber_length(index_byte_count);

  1197.         index_byte_count += klv_fill_size(index_byte_count);

  1198.     }

  1199. 

  1200.     if (!memcmp(key, body_partition_key, 16)) {

  1201.         mxf->body_partition_offset =

  1202.             av_realloc(mxf->body_partition_offset,

  1203.                        (mxf->body_partitions_count+1)*

  1204.                        sizeof(*mxf->body_partition_offset));

  1205.         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;

  1206.     }

  1207. 

  1208.     // write klv

  1209.     put_buffer(pb, key, 16);

  1210.     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);

  1211. 

  1212.     // write partition value

  1213.     put_be16(pb, 1); // majorVersion

  1214.     put_be16(pb, 2); // minorVersion

  1215.     put_be32(pb, KAG_SIZE); // KAGSize

  1216. 

  1217.     put_be64(pb, partition_offset); // ThisPartition

  1218. 

  1219.     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)

  1220.         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition

  1221.     else if (!memcmp(key, footer_partition_key, 16) && mxf->body_partitions_count)

  1222.         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition

  1223.     else

  1224.         put_be64(pb, 0);

  1225. 

  1226.     put_be64(pb, mxf->footer_partition_offset); // footerPartition

  1227. 

  1228.     // set offset

  1229.     header_byte_count_offset = url_ftell(pb);

  1230.     put_be64(pb, 0); // headerByteCount, update later

  1231. 

  1232.     // indexTable

  1233.     put_be64(pb, index_byte_count); // indexByteCount

  1234.     put_be32(pb, index_byte_count ? indexsid : 0); // indexSID

  1235. 

  1236.     // BodyOffset

  1237.     if (bodysid && mxf->edit_units_count && mxf->body_partitions_count) {

  1238.         put_be64(pb, mxf->body_offset);

  1239.     } else

  1240.         put_be64(pb, 0);

  1241. 

  1242.     put_be32(pb, bodysid); // bodySID

  1243. 

  1244.     // operational pattern

  1245.     if (s->nb_streams > 1) {

  1246.         put_buffer(pb, op1a_ul, 14);

  1247.         put_be16(pb, 0x0900); // multi track

  1248.     } else {

  1249.         put_buffer(pb, op1a_ul, 16);

  1250.     }

  1251. 

  1252.     // essence container

  1253.     mxf_write_essence_container_refs(s);

  1254. 

  1255.     if (write_metadata) {

  1256.         // mark the start of the headermetadata and calculate metadata size

  1257.         int64_t pos, start;

  1258.         unsigned header_byte_count;

  1259. 

  1260.         mxf_write_klv_fill(s);

  1261.         start = url_ftell(s->pb);

  1262.         mxf_write_primer_pack(s);

  1263.         mxf_write_header_metadata_sets(s);

  1264.         pos = url_ftell(s->pb);

  1265.         header_byte_count = pos - start + klv_fill_size(pos);

  1266. 

  1267.         // update header_byte_count

  1268.         url_fseek(pb, header_byte_count_offset, SEEK_SET);

  1269.         put_be64(pb, header_byte_count);

  1270.         url_fseek(pb, pos, SEEK_SET);

  1271.     }

  1272. 

  1273.     put_flush_packet(pb);

  1274. }

  1275. 

  1276. static const UID mxf_mpeg2_codec_uls[] = {

  1277.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame

  1278.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP

  1279.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame

  1280.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP

  1281.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame

  1282.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP

  1283.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame

  1284.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP

  1285. };

  1286. 

  1287. static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)

  1288. {

  1289.     if (avctx->profile == 4) { // Main

  1290.         if (avctx->level == 8) // Main

  1291.             return avctx->gop_size ?

  1292.                 &mxf_mpeg2_codec_uls[1] :

  1293.                 &mxf_mpeg2_codec_uls[0];

  1294.         else if (avctx->level == 4) // High

  1295.             return avctx->gop_size ?

  1296.                 &mxf_mpeg2_codec_uls[5] :

  1297.                 &mxf_mpeg2_codec_uls[4];

  1298.     } else if (avctx->profile == 0) { // 422

  1299.         if (avctx->level == 5) // Main

  1300.             return avctx->gop_size ?

  1301.                 &mxf_mpeg2_codec_uls[3] :

  1302.                 &mxf_mpeg2_codec_uls[2];

  1303.         else if (avctx->level == 2) // High

  1304.             return avctx->gop_size ?

  1305.                 &mxf_mpeg2_codec_uls[7] :

  1306.                 &mxf_mpeg2_codec_uls[6];

  1307.     }

  1308.     return NULL;

  1309. }

  1310. 

  1311. static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt, int *flags)

  1312. {

  1313.     MXFStreamContext *sc = st->priv_data;

  1314.     MXFContext *mxf = s->priv_data;

  1315.     uint32_t c = -1;

  1316.     int i;

  1317. 

  1318.     *flags = 0;

  1319. 

  1320.     for(i = 0; i < pkt->size - 4; i++) {

  1321.         c = (c<<8) + pkt->data[i];

  1322.         if (c == 0x1B5) {

  1323.             if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext

  1324.                 st->codec->profile = pkt->data[i+1] & 0x07;

  1325.                 st->codec->level   = pkt->data[i+2] >> 4;

  1326.             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext

  1327.                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame

  1328.                 break;

  1329.             }

  1330.         } else if (c == 0x1b8) { // gop

  1331.             if (i + 4 < pkt->size) {

  1332.                 if (pkt->data[i+4]>>6 & 0x01) // closed

  1333.                     *flags |= 0x80; // random access

  1334.                 if (!mxf->header_written) {

  1335.                     unsigned hours   =  (pkt->data[i+1]>>2) & 0x1f;

  1336.                     unsigned minutes = ((pkt->data[i+1] & 0x03) << 4) | (pkt->data[i+2]>>4);

  1337.                     unsigned seconds = ((pkt->data[i+2] & 0x07) << 3) | (pkt->data[i+3]>>5);

  1338.                     unsigned frames  = ((pkt->data[i+3] & 0x1f) << 1) | (pkt->data[i+4]>>7);

  1339.                     mxf->timecode_drop_frame = !!(pkt->data[i+1] & 0x80);

  1340.                     mxf->timecode_start = (hours*3600 + minutes*60 + seconds) *

  1341.                         mxf->timecode_base + frames;

  1342.                     if (mxf->timecode_drop_frame) {

  1343.                         unsigned tminutes = 60 * hours + minutes;

  1344.                         mxf->timecode_start -= 2 * (tminutes - tminutes / 10);

  1345.                     }

  1346.                     av_log(s, AV_LOG_DEBUG, "frame %d %d:%d:%d%c%d\n", mxf->timecode_start,

  1347.                            hours, minutes, seconds, mxf->timecode_drop_frame ? ';':':', frames);

  1348.                 }

  1349.             }

  1350.         } else if (c == 0x1b3) { // seq

  1351.             *flags |= 0x40;

  1352.         } else if (c == 0x100) { // pic

  1353.             int pict_type = (pkt->data[i+2]>>3) & 0x07;

  1354.             if (pict_type == 2) { // P frame

  1355.                 *flags |= 0x22;

  1356.                 st->codec->gop_size = 1;

  1357.             } else if (pict_type == 3) { // B frame

  1358.                 *flags |= 0x33;

  1359.                 sc->temporal_reordering = -1;

  1360.             } else if (!pict_type) {

  1361.                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");

  1362.                 return 0;

  1363.             }

  1364.         }

  1365.     }

  1366.     if (s->oformat != &mxf_d10_muxer)

  1367.         sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);

  1368.     return !!sc->codec_ul;

  1369. }

  1370. 

  1371. static uint64_t mxf_parse_timestamp(time_t timestamp)

  1372. {

  1373.     struct tm *time = localtime(&timestamp);

  1374.     return (uint64_t)(time->tm_year+1900) << 48 |

  1375.            (uint64_t)(time->tm_mon+1)     << 40 |

  1376.            (uint64_t) time->tm_mday       << 32 |

  1377.                       time->tm_hour       << 24 |

  1378.                       time->tm_min        << 16 |

  1379.                       time->tm_sec        << 8;

  1380. }

  1381. 

  1382. static int mxf_write_header(AVFormatContext *s)

  1383. {

  1384.     MXFContext *mxf = s->priv_data;

  1385.     int i;

  1386.     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};

  1387.     const int *samples_per_frame = NULL;

  1388. 

  1389.     for (i = 0; i < s->nb_streams; i++) {

  1390.         AVStream *st = s->streams[i];

  1391.         MXFStreamContext *sc = av_mallocz(sizeof(*sc));

  1392.         if (!sc)

  1393.             return AVERROR(ENOMEM);

  1394.         st->priv_data = sc;

  1395. 

  1396.         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {

  1397.             if (i != 0) {

  1398.                 av_log(s, AV_LOG_ERROR, "video stream must be first track\n");

  1399.                 return -1;

  1400.             }

  1401.             if (fabs(av_q2d(st->codec->time_base) - 1/25.0) < 0.0001) {

  1402.                 samples_per_frame = PAL_samples_per_frame;

  1403.                 mxf->time_base = (AVRational){ 1, 25 };

  1404.                 mxf->timecode_base = 25;

  1405.             } else if (fabs(av_q2d(st->codec->time_base) - 1001/30000.0) < 0.0001) {

  1406.                 samples_per_frame = NTSC_samples_per_frame;

  1407.                 mxf->time_base = (AVRational){ 1001, 30000 };

  1408.                 mxf->timecode_base = 30;

  1409.             } else {

  1410.                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");

  1411.                 return -1;

  1412.             }

  1413.             av_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);

  1414.             if (s->oformat == &mxf_d10_muxer) {

  1415.                 if (st->codec->bit_rate == 50000000)

  1416.                     if (mxf->time_base.den == 25) sc->index = 3;

  1417.                     else                          sc->index = 5;

  1418.                 else if (st->codec->bit_rate == 40000000)

  1419.                     if (mxf->time_base.den == 25) sc->index = 7;

  1420.                     else                          sc->index = 9;

  1421.                 else if (st->codec->bit_rate == 30000000)

  1422.                     if (mxf->time_base.den == 25) sc->index = 11;

  1423.                     else                          sc->index = 13;

  1424.                 else {

  1425.                     av_log(s, AV_LOG_ERROR, "error MXF D-10 only support 30/40/50 mbit/s\n");

  1426.                     return -1;

  1427.                 }

  1428. 

  1429.                 mxf->edit_unit_byte_count = KAG_SIZE; // system element

  1430.                 mxf->edit_unit_byte_count += 16 + 4 + (uint64_t)st->codec->bit_rate *

  1431.                     mxf->time_base.num / (8*mxf->time_base.den);

  1432.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1433.                 mxf->edit_unit_byte_count += 16 + 4 + 4 + samples_per_frame[0]*8*4;

  1434.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1435.             }

  1436.         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {

  1437.             if (st->codec->sample_rate != 48000) {

  1438.                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");

  1439.                 return -1;

  1440.             }

  1441.             av_set_pts_info(st, 64, 1, st->codec->sample_rate);

  1442.             if (s->oformat == &mxf_d10_muxer) {

  1443.                 if (st->index != 1) {

  1444.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support one audio track\n");

  1445.                     return -1;

  1446.                 }

  1447.                 if (st->codec->codec_id != CODEC_ID_PCM_S16LE &&

  1448.                     st->codec->codec_id != CODEC_ID_PCM_S24LE) {

  1449.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support 16 or 24 bits le audio\n");

  1450.                 }

  1451.                 sc->index = ((MXFStreamContext*)s->streams[0]->priv_data)->index + 1;

  1452.             } else

  1453.             mxf->slice_count = 1;

  1454.         }

  1455. 

  1456.         if (!sc->index) {

  1457.             sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);

  1458.             if (sc->index == -1) {

  1459.                 av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "

  1460.                        "codec not currently supported in container\n", i);

  1461.                 return -1;

  1462.             }

  1463.         }

  1464. 

  1465.         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;

  1466. 

  1467.         if (!present[sc->index]) {

  1468.             present[sc->index] = 1;

  1469.             mxf->essence_container_count++;

  1470.         } else

  1471.             present[sc->index]++;

  1472. 

  1473.         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);

  1474.         sc->track_essence_element_key[15] = present[sc->index];

  1475.         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);

  1476.     }

  1477. 

  1478.     if (s->oformat == &mxf_d10_muxer) {

  1479.         mxf->essence_container_count = 1;

  1480.     }

  1481. 

  1482.     for (i = 0; i < s->nb_streams; i++) {

  1483.         MXFStreamContext *sc = s->streams[i]->priv_data;

  1484.         // update element count

  1485.         sc->track_essence_element_key[13] = present[sc->index];

  1486.         sc->order = AV_RB32(sc->track_essence_element_key+12);

  1487.     }

  1488. 

  1489.     mxf->timestamp = mxf_parse_timestamp(s->timestamp);

  1490.     mxf->duration = -1;

  1491. 

  1492.     mxf->timecode_track = av_mallocz(sizeof(*mxf->timecode_track));

  1493.     if (!mxf->timecode_track)

  1494.         return AVERROR(ENOMEM);

  1495.     mxf->timecode_track->priv_data = av_mallocz(sizeof(MXFStreamContext));

  1496.     if (!mxf->timecode_track->priv_data)

  1497.         return AVERROR(ENOMEM);

  1498.     mxf->timecode_track->index = s->nb_streams;

  1499. 

  1500.     if (!samples_per_frame)

  1501.         samples_per_frame = PAL_samples_per_frame;

  1502. 

  1503.     if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)

  1504.         return -1;

  1505. 

  1506.     return 0;

  1507. }

  1508. 

  1509. static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };

  1510. static const uint8_t system_metadata_package_set_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x43,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x02,0x01 };

  1511. 

  1512. static uint32_t ff_framenum_to_12m_time_code(unsigned frame, int drop, int fps)

  1513. {

  1514.     return (0                                    << 31) | // color frame flag

  1515.            (0                                    << 30) | // drop  frame flag

  1516.            ( ((frame % fps) / 10)                << 28) | // tens  of frames

  1517.            ( ((frame % fps) % 10)                << 24) | // units of frames

  1518.            (0                                    << 23) | // field phase (NTSC), b0 (PAL)

  1519.            ((((frame / fps) % 60) / 10)          << 20) | // tens  of seconds

  1520.            ((((frame / fps) % 60) % 10)          << 16) | // units of seconds

  1521.            (0                                    << 15) | // b0 (NTSC), b2 (PAL)

  1522.            ((((frame / (fps * 60)) % 60) / 10)   << 12) | // tens  of minutes

  1523.            ((((frame / (fps * 60)) % 60) % 10)   <<  8) | // units of minutes

  1524.            (0                                    <<  7) | // b1

  1525.            (0                                    <<  6) | // b2 (NSC), field phase (PAL)

  1526.            ((((frame / (fps * 3600) % 24)) / 10) <<  4) | // tens  of hours

  1527.            (  (frame / (fps * 3600) % 24)) % 10;          // units of hours

  1528. }

  1529. 

  1530. static void mxf_write_system_item(AVFormatContext *s)

  1531. {

  1532.     MXFContext *mxf = s->priv_data;

  1533.     ByteIOContext *pb = s->pb;

  1534.     unsigned frame;

  1535.     uint32_t time_code;

  1536. 

  1537.     frame = mxf->timecode_start + mxf->last_indexed_edit_unit + mxf->edit_units_count;

  1538. 

  1539.     // write system metadata pack

  1540.     put_buffer(pb, system_metadata_pack_key, 16);

  1541.     klv_encode_ber4_length(pb, 57);

  1542.     put_byte(pb, 0x5c); // UL, user date/time stamp, picture and sound item present

  1543.     put_byte(pb, 0x04); // content package rate

  1544.     put_byte(pb, 0x00); // content package type

  1545.     put_be16(pb, 0x00); // channel handle

  1546.     put_be16(pb, frame); // continuity count

  1547.     if (mxf->essence_container_count > 1)

  1548.         put_buffer(pb, multiple_desc_ul, 16);

  1549.     else {

  1550.         MXFStreamContext *sc = s->streams[0]->priv_data;

  1551.         put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);

  1552.     }

  1553.     put_byte(pb, 0);

  1554.     put_be64(pb, 0);

  1555.     put_be64(pb, 0); // creation date/time stamp

  1556. 

  1557.     put_byte(pb, 0x81); // SMPTE 12M time code

  1558.     time_code = ff_framenum_to_12m_time_code(frame, mxf->timecode_drop_frame, mxf->timecode_base);

  1559.     put_be32(pb, time_code);

  1560.     put_be32(pb, 0); // binary group data

  1561.     put_be64(pb, 0);

  1562. 

  1563.     // write system metadata package set

  1564.     put_buffer(pb, system_metadata_package_set_key, 16);

  1565.     klv_encode_ber4_length(pb, 35);

  1566.     put_byte(pb, 0x83); // UMID

  1567.     put_be16(pb, 0x20);

  1568.     mxf_write_umid(pb, SourcePackage, 0);

  1569. }

  1570. 

  1571. static void mxf_write_d10_video_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1572. {

  1573.     MXFContext *mxf = s->priv_data;

  1574.     ByteIOContext *pb = s->pb;

  1575.     int packet_size = (uint64_t)st->codec->bit_rate*mxf->time_base.num /

  1576.         (8*mxf->time_base.den); // frame size

  1577.     int pad;

  1578. 

  1579.     packet_size += 16 + 4;

  1580.     packet_size += klv_fill_size(packet_size);

  1581. 

  1582.     klv_encode_ber4_length(pb, pkt->size);

  1583.     put_buffer(pb, pkt->data, pkt->size);

  1584. 

  1585.     // ensure CBR muxing by padding to correct video frame size

  1586.     pad = packet_size - pkt->size - 16 - 4;

  1587.     if (pad > 20) {

  1588.         put_buffer(s->pb, klv_fill_key, 16);

  1589.         pad -= 16 + 4;

  1590.         klv_encode_ber4_length(s->pb, pad);

  1591.         for (; pad; pad--)

  1592.             put_byte(s->pb, 0);

  1593.         assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));

  1594.     } else {

  1595.         av_log(s, AV_LOG_WARNING, "cannot fill d-10 video packet\n");

  1596.         for (; pad > 0; pad--)

  1597.             put_byte(s->pb, 0);

  1598.     }

  1599. }

  1600. 

  1601. static void mxf_write_d10_audio_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1602. {

  1603.     MXFContext *mxf = s->priv_data;

  1604.     ByteIOContext *pb = s->pb;

  1605.     int frame_size = (pkt->size<<3) /

  1606.         (st->codec->channels*av_get_bits_per_sample(st->codec->codec_id));

  1607.     uint8_t *samples = pkt->data;

  1608.     uint8_t *end = pkt->data + pkt->size;

  1609.     int i;

  1610. 

  1611.     klv_encode_ber4_length(pb, 4 + frame_size*4*8);

  1612. 

  1613.     put_byte(pb, (frame_size == 1920 ? 0 : (mxf->edit_units_count-1) % 5 + 1));

  1614.     put_le16(pb, frame_size);

  1615.     put_byte(pb, (1<<st->codec->channels)-1);

  1616. 

  1617.     while (samples < end) {

  1618.         for (i = 0; i < st->codec->channels; i++) {

  1619.             uint32_t sample;

  1620.             if (st->codec->codec_id == CODEC_ID_PCM_S24LE) {

  1621.                 sample = (AV_RL24(samples)<< 4)|((samples==pkt->data)<<3) | i;

  1622.                 samples += 3;

  1623.             } else {

  1624.                 sample = (AV_RL16(samples)<<12)|((samples==pkt->data)<<3) | i;

  1625.                 samples += 2;

  1626.             }

  1627.             put_le32(pb, sample);

  1628.         }

  1629.         for (; i < 8; i++)

  1630.             put_le32(pb, 0);

  1631.     }

  1632. }

  1633. 

  1634. static int mxf_write_d10_packet(AVFormatContext *s, AVPacket *pkt)

  1635. {

  1636.     MXFContext *mxf = s->priv_data;

  1637.     ByteIOContext *pb = s->pb;

  1638.     AVStream *st = s->streams[pkt->stream_index];

  1639.     MXFStreamContext *sc = st->priv_data;

  1640.     int flags = 0;

  1641. 

  1642.     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {

  1643.         if (!mxf_parse_mpeg2_frame(s, st, pkt, &flags)) {

  1644.             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");

  1645.             return -1;

  1646.         }

  1647.     }

  1648. 

  1649.     if (!mxf->header_written) {

  1650.         mxf_write_partition(s, 1, 2, header_open_partition_key, 1);

  1651.         mxf->header_written = 1;

  1652.         mxf_write_klv_fill(s);

  1653.         mxf_write_index_table_segment(s);

  1654.     }

  1655. 

  1656.     if (st->index == 0) {

  1657.         mxf_write_klv_fill(s);

  1658.         mxf_write_system_item(s);

  1659. 

  1660.         mxf->edit_units_count++;

  1661.     }

  1662. 

  1663.     mxf_write_klv_fill(s);

  1664.     put_buffer(pb, sc->track_essence_element_key, 16); // write key

  1665.     if (st->codec->codec_type == CODEC_TYPE_VIDEO)

  1666.         mxf_write_d10_video_packet(s, st, pkt);

  1667.     else

  1668.         mxf_write_d10_audio_packet(s, st, pkt);

  1669. 

  1670.     put_flush_packet(pb);

  1671. 

  1672.     return 0;

  1673. }

  1674. 

  1675. static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)

  1676. {

  1677.     MXFContext *mxf = s->priv_data;

  1678.     ByteIOContext *pb = s->pb;

  1679.     AVStream *st = s->streams[pkt->stream_index];

  1680.     MXFStreamContext *sc = st->priv_data;

  1681.     int flags = 0;

  1682. 

  1683.     if (!(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {

  1684.         mxf->index_entries = av_realloc(mxf->index_entries,

  1685.             (mxf->edit_units_count + EDIT_UNITS_PER_BODY)*sizeof(*mxf->index_entries));

  1686.         if (!mxf->index_entries) {

  1687.             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");

  1688.             return -1;

  1689.         }

  1690.     }

  1691. 

  1692.     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {

  1693.         if (!mxf_parse_mpeg2_frame(s, st, pkt, &flags)) {

  1694.             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");

  1695.             return -1;

  1696.         }

  1697.     }

  1698. 

  1699.     if (!mxf->header_written) {

  1700.         mxf_write_partition(s, 0, 0, header_open_partition_key, 1);

  1701.         mxf->header_written = 1;

  1702.     }

  1703. 

  1704.     if (st->index == 0) {

  1705.         if ((!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&

  1706.             !(flags & 0x33)) { // I frame, Gop start

  1707.             mxf_write_klv_fill(s);

  1708.             mxf_write_partition(s, 1, 2, body_partition_key, 0);

  1709. 

  1710.             mxf_write_klv_fill(s);

  1711.             mxf_write_index_table_segment(s);

  1712.         }

  1713. 

  1714.         mxf_write_klv_fill(s);

  1715.         mxf->index_entries[mxf->edit_units_count].offset = mxf->body_offset;

  1716.         mxf->index_entries[mxf->edit_units_count].flags = flags;

  1717.         mxf_write_system_item(s);

  1718. 

  1719.         mxf->body_offset += KAG_SIZE; // size of system element

  1720. 

  1721.         mxf->edit_units_count++;

  1722.     } else if (st->index == 1) {

  1723.         mxf->index_entries[mxf->edit_units_count-1].slice_offset =

  1724.             mxf->body_offset - mxf->index_entries[mxf->edit_units_count-1].offset;

  1725.     }

  1726. 

  1727.     mxf_write_klv_fill(s);

  1728.     put_buffer(pb, sc->track_essence_element_key, 16); // write key

  1729.     klv_encode_ber4_length(pb, pkt->size); // write length

  1730.     put_buffer(pb, pkt->data, pkt->size); // write value

  1731. 

  1732.     put_flush_packet(pb);

  1733. 

  1734.     mxf->body_offset += 16+4+pkt->size + klv_fill_size(16+4+pkt->size);

  1735. 

  1736.     return 0;

  1737. }

  1738. 

  1739. static void mxf_write_random_index_pack(AVFormatContext *s)

  1740. {

  1741.     MXFContext *mxf = s->priv_data;

  1742.     ByteIOContext *pb = s->pb;

  1743.     uint64_t pos = url_ftell(pb);

  1744.     int i;

  1745. 

  1746.     put_buffer(pb, random_index_pack_key, 16);

  1747.     klv_encode_ber_length(pb, 28 + 12*mxf->body_partitions_count);

  1748. 

  1749.     put_be32(pb, 0); // BodySID of header partition

  1750.     put_be64(pb, 0); // offset of header partition

  1751. 

  1752.     for (i = 0; i < mxf->body_partitions_count; i++) {

  1753.         put_be32(pb, 1); // BodySID

  1754.         put_be64(pb, mxf->body_partition_offset[i]);

  1755.     }

  1756. 

  1757.     put_be32(pb, 0); // BodySID of footer partition

  1758.     put_be64(pb, mxf->footer_partition_offset);

  1759. 

  1760.     put_be32(pb, url_ftell(pb) - pos + 4);

  1761. }

  1762. 

  1763. static int mxf_write_footer(AVFormatContext *s)

  1764. {

  1765.     MXFContext *mxf = s->priv_data;

  1766.     ByteIOContext *pb = s->pb;

  1767. 

  1768.     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  1769. 

  1770.     mxf_write_klv_fill(s);

  1771.     mxf->footer_partition_offset = url_ftell(pb);

  1772.     if (mxf->edit_unit_byte_count) { // no need to repeat index

  1773.         mxf_write_partition(s, 0, 0, footer_partition_key, 0);

  1774.     } else {

  1775.         mxf_write_partition(s, 0, 2, footer_partition_key, 0);

  1776. 

  1777.         mxf_write_klv_fill(s);

  1778.         mxf_write_index_table_segment(s);

  1779.     }

  1780. 

  1781.     mxf_write_klv_fill(s);

  1782.     mxf_write_random_index_pack(s);

  1783. 

  1784.     if (!url_is_streamed(s->pb)) {

  1785.         int index;

  1786.         url_fseek(pb, 0, SEEK_SET);

  1787.         if (s->oformat == &mxf_d10_muxer) {

  1788.             mxf_write_partition(s, 1, 2, header_closed_partition_key, 1);

  1789.             index = 1;

  1790.         } else if (mxf->edit_unit_byte_count) {

  1791.             mxf_write_partition(s, 0, 2, header_closed_partition_key, 1);

  1792.             index = 1;

  1793.         } else {

  1794.             mxf_write_partition(s, 0, 0, header_closed_partition_key, 1);

  1795.             index = 0;

  1796.         }

  1797.         if (index) {

  1798.             mxf_write_klv_fill(s);

  1799.             mxf_write_index_table_segment(s);

  1800.         }

  1801.     }

  1802. 

  1803.     ff_audio_interleave_close(s);

  1804. 

  1805.     av_freep(&mxf->index_entries);

  1806.     av_freep(&mxf->body_partition_offset);

  1807.     av_freep(&mxf->timecode_track->priv_data);

  1808.     av_freep(&mxf->timecode_track);

  1809. 

  1810.     mxf_free(s);

  1811. 

  1812.     return 0;

  1813. }

  1814. 

  1815. static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  1816. {

  1817.     AVPacketList *pktl;

  1818.     int stream_count = 0;

  1819.     int streams[MAX_STREAMS];

  1820. 

  1821.     memset(streams, 0, sizeof(streams));

  1822.     pktl = s->packet_buffer;

  1823.     while (pktl) {

  1824.         //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);

  1825.         if (!streams[pktl->pkt.stream_index])

  1826.             stream_count++;

  1827.         streams[pktl->pkt.stream_index]++;

  1828.         pktl = pktl->next;

  1829.     }

  1830. 

  1831.     if (stream_count && (s->nb_streams == stream_count || flush)) {

  1832.         pktl = s->packet_buffer;

  1833.         if (s->nb_streams != stream_count) {

  1834.             AVPacketList *first = NULL;

  1835.             AVPacketList *last = NULL;

  1836.             // find first packet in edit unit

  1837.             while (pktl) {

  1838.                 AVStream *st = s->streams[pktl->pkt.stream_index];

  1839.                 if (st->index == 0)

  1840.                     break;

  1841.                 else if (!first)

  1842.                     first = pktl;

  1843.                 last = pktl;

  1844.                 pktl = pktl->next;

  1845.             }

  1846.             if (last)

  1847.                 last->next = NULL;

  1848.             // purge packet queue

  1849.             while (pktl) {

  1850.                 AVPacketList *next = pktl->next;

  1851.                 av_free_packet(&pktl->pkt);

  1852.                 av_freep(&pktl);

  1853.                 pktl = next;

  1854.             }

  1855.             if (!first)

  1856.                 goto out;

  1857.             pktl = first;

  1858.         }

  1859. 

  1860.         *out = pktl->pkt;

  1861.         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);

  1862.         s->packet_buffer = pktl->next;

  1863.         av_freep(&pktl);

  1864.         return 1;

  1865.     } else {

  1866.     out:

  1867.         av_init_packet(out);

  1868.         return 0;

  1869.     }

  1870. }

  1871. 

  1872. static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)

  1873. {

  1874.     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;

  1875.     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;

  1876. 

  1877.     return next->dts > pkt->dts ||

  1878.         (next->dts == pkt->dts && sc->order < sc2->order);

  1879. }

  1880. 

  1881. static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  1882. {

  1883.     return ff_audio_rechunk_interleave(s, out, pkt, flush,

  1884.                                mxf_interleave_get_packet, mxf_compare_timestamps);

  1885. }

  1886. 

  1887. AVOutputFormat mxf_muxer = {

  1888.     "mxf",

  1889.     NULL_IF_CONFIG_SMALL("Material eXchange Format"),

  1890.     "application/mxf",

  1891.     "mxf",

  1892.     sizeof(MXFContext),

  1893.     CODEC_ID_PCM_S16LE,

  1894.     CODEC_ID_MPEG2VIDEO,

  1895.     mxf_write_header,

  1896.     mxf_write_packet,

  1897.     mxf_write_footer,

  1898.     AVFMT_NOTIMESTAMPS,

  1899.     NULL,

  1900.     mxf_interleave,

  1901. };

  1902. 

  1903. AVOutputFormat mxf_d10_muxer = {

  1904.     "mxf_d10",

  1905.     NULL_IF_CONFIG_SMALL("Material eXchange Format, D-10 Mapping"),

  1906.     "application/mxf",

  1907.     NULL,

  1908.     sizeof(MXFContext),

  1909.     CODEC_ID_PCM_S16LE,

  1910.     CODEC_ID_MPEG2VIDEO,

  1911.     mxf_write_header,

  1912.     mxf_write_d10_packet,

  1913.     mxf_write_footer,

  1914.     AVFMT_NOTIMESTAMPS,

  1915.     NULL,

  1916.     mxf_interleave,

  1917. };