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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.     AVRational aspect_ratio; ///< display aspect ratio

  72. } MXFStreamContext;

  73. 

  74. typedef struct {

  75.     UID container_ul;

  76.     UID element_ul;

  77.     UID codec_ul;

  78.     void (*write_desc)();

  79. } MXFContainerEssenceEntry;

  80. 

  81. static const struct {

  82.     enum CodecID id;

  83.     int index;

  84. } mxf_essence_mappings[] = {

  85.     { CODEC_ID_MPEG2VIDEO, 0 },

  86.     { CODEC_ID_PCM_S24LE,  1 },

  87.     { CODEC_ID_PCM_S16LE,  1 },

  88.     { 0 }

  89. };

  90. 

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

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

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

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

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

  96. 

  97. static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {

  98.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },

  99.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  100.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },

  101.       mxf_write_mpegvideo_desc },

  102.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },

  103.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },

  104.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  105.       mxf_write_aes3_desc },

  106.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },

  107.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },

  108.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  109.       mxf_write_wav_desc },

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

  111.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },

  112.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

  113.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 },

  114.       mxf_write_cdci_desc },

  115.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },

  116.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  117.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  118.       mxf_write_generic_sound_desc },

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

  120.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },

  121.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

  122.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x02 },

  123.       mxf_write_cdci_desc },

  124.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },

  125.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  126.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  127.       mxf_write_generic_sound_desc },

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

  129.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },

  130.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

  131.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x03 },

  132.       mxf_write_cdci_desc },

  133.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },

  134.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  135.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  136.       mxf_write_generic_sound_desc },

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

  138.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },

  139.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

  140.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x04 },

  141.       mxf_write_cdci_desc },

  142.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },

  143.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  144.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  145.       mxf_write_generic_sound_desc },

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

  147.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },

  148.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

  149.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 },

  150.       mxf_write_cdci_desc },

  151.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },

  152.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  153.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  154.       mxf_write_generic_sound_desc },

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

  156.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },

  157.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

  158.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x06 },

  159.       mxf_write_cdci_desc },

  160.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },

  161.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  162.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  163.       mxf_write_generic_sound_desc },

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

  167.       NULL },

  168. };

  169. 

  170. typedef struct MXFContext {

  171.     int64_t footer_partition_offset;

  172.     int essence_container_count;

  173.     AVRational time_base;

  174.     int header_written;

  175.     MXFIndexEntry *index_entries;

  176.     unsigned edit_units_count;

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

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

  179.     int last_indexed_edit_unit;

  180.     uint64_t *body_partition_offset;

  181.     unsigned body_partitions_count;

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

  183.     uint64_t duration;

  184.     AVStream *timecode_track;

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

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

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

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

  189.     uint64_t body_offset;

  190. } MXFContext;

  191. 

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

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

  194. 

  195. /**

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

  197.  */

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

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

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

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

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

  203. 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

  204. 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

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

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

  207. 

  208. /**

  209.  * partial key for header metadata

  210.  */

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

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

  213. 

  214. /**

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

  216.  */

  217. static const MXFLocalTagPair mxf_local_tag_batch[] = {

  218.     // preface set

  219.     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */

  220.     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */

  221.     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */

  222.     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */

  223.     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */

  224.     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */

  225.     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */

  226.     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */

  227.     // Identification

  228.     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */

  229.     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */

  230.     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */

  231.     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */

  232.     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */

  233.     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */

  234.     // Content Storage

  235.     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */

  236.     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */

  237.     // Essence Container Data

  238.     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */

  239.     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */

  240.     // Package

  241.     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */

  242.     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */

  243.     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */

  244.     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */

  245.     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */

  246.     // Track

  247.     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */

  248.     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */

  249.     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */

  250.     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */

  251.     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */

  252.     // Sequence

  253.     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */

  254.     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */

  255.     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */

  256.     // Source Clip

  257.     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */

  258.     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */

  259.     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */

  260.     // Timecode Component

  261.     { 0x1501, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x05,0x00,0x00}}, /* Start Time Code */

  262.     { 0x1502, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x04,0x01,0x01,0x02,0x06,0x00,0x00}}, /* Rounded Time Code Base */

  263.     { 0x1503, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x04,0x01,0x01,0x05,0x00,0x00,0x00}}, /* Drop Frame */

  264.     // File Descriptor

  265.     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */

  266.     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */

  267.     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */

  268.     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */

  269.     // Generic Picture Essence Descriptor

  270.     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */

  271.     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */

  272.     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */

  273.     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */

  274.     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */

  275.     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */

  276.     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */

  277.     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */

  278.     // CDCI Picture Essence Descriptor

  279.     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */

  280.     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */

  281.     // Generic Sound Essence Descriptor

  282.     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */

  283.     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */

  284.     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */

  285.     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */

  286.     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */

  287.     // Index Table Segment

  288.     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */

  289.     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */

  290.     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */

  291.     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */

  292.     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */

  293.     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */

  294.     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */

  295.     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */

  296.     // MPEG video Descriptor

  297.     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */

  298.     // Wave Audio Essence Descriptor

  299.     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */

  300.     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */

  301. };

  302. 

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

  304. {

  305.     put_buffer(pb, uuid_base, 12);

  306.     put_be16(pb, type);

  307.     put_be16(pb, value);

  308. }

  309. 

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

  311. {

  312.     put_buffer(pb, umid_base, 16);

  313.     mxf_write_uuid(pb, type, value);

  314. }

  315. 

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

  317. {

  318.     put_be32(pb, ref_count);

  319.     put_be32(pb, 16);

  320. }

  321. 

  322. static int klv_ber_length(uint64_t len)

  323. {

  324.     if (len < 128)

  325.         return 1;

  326.     else

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

  328. }

  329. 

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

  331. {

  332.     // Determine the best BER size

  333.     int size;

  334.     if (len < 128) {

  335.         //short form

  336.         put_byte(pb, len);

  337.         return 1;

  338.     }

  339. 

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

  341. 

  342.     // long form

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

  344.     while(size) {

  345.         size--;

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

  347.     }

  348.     return 0;

  349. }

  350. 

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

  352. {

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

  354.     put_be24(pb, len);

  355. }

  356. 

  357. /*

  358.  * Get essence container ul index

  359.  */

  360. static int mxf_get_essence_container_ul_index(enum CodecID id)

  361. {

  362.     int i;

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

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

  365.             return mxf_essence_mappings[i].index;

  366.     return -1;

  367. }

  368. 

  369. static void mxf_write_primer_pack(AVFormatContext *s)

  370. {

  371.     ByteIOContext *pb = s->pb;

  372.     int local_tag_number, i = 0;

  373. 

  374.     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);

  375. 

  376.     put_buffer(pb, primer_pack_key, 16);

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

  378. 

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

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

  381. 

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

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

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

  385.     }

  386. }

  387. 

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

  389. {

  390.     put_be16(pb, tag);

  391.     put_be16(pb, size);

  392. }

  393. 

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

  395. {

  396.     put_buffer(pb, header_metadata_key, 13);

  397.     put_be24(pb, value);

  398. }

  399. 

  400. static void mxf_free(AVFormatContext *s)

  401. {

  402.     int i;

  403. 

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

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

  406.         av_freep(&st->priv_data);

  407.     }

  408. }

  409. 

  410. static const MXFCodecUL *mxf_get_data_definition_ul(int type)

  411. {

  412.     const MXFCodecUL *uls = ff_mxf_data_definition_uls;

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

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

  415.             break;

  416.         uls++;

  417.     }

  418.     return uls;

  419. }

  420. 

  421. static void mxf_write_essence_container_refs(AVFormatContext *s)

  422. {

  423.     MXFContext *c = s->priv_data;

  424.     ByteIOContext *pb = s->pb;

  425.     int i;

  426. 

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

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

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

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

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

  432.     }

  433. }

  434. 

  435. static void mxf_write_preface(AVFormatContext *s)

  436. {

  437.     MXFContext *mxf = s->priv_data;

  438.     ByteIOContext *pb = s->pb;

  439. 

  440.     mxf_write_metadata_key(pb, 0x012f00);

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

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

  443. 

  444.     // write preface set uid

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

  446.     mxf_write_uuid(pb, Preface, 0);

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

  448. 

  449.     // last modified date

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

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

  452. 

  453.     // write version

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

  455.     put_be16(pb, 1);

  456. 

  457.     // write identification_refs

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

  459.     mxf_write_refs_count(pb, 1);

  460.     mxf_write_uuid(pb, Identification, 0);

  461. 

  462.     // write content_storage_refs

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

  464.     mxf_write_uuid(pb, ContentStorage, 0);

  465. 

  466.     // operational pattern

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

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

  469.         put_buffer(pb, op1a_ul, 14);

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

  471.     } else {

  472.         put_buffer(pb, op1a_ul, 16);

  473.     }

  474. 

  475.     // write essence_container_refs

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

  477.     mxf_write_essence_container_refs(s);

  478. 

  479.     // write dm_scheme_refs

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

  481.     put_be64(pb, 0);

  482. }

  483. 

  484. /*

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

  486.  */

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

  488. {

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

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

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

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

  493. }

  494. 

  495. static void mxf_write_identification(AVFormatContext *s)

  496. {

  497.     MXFContext *mxf = s->priv_data;

  498.     ByteIOContext *pb = s->pb;

  499.     const char *company = "FFmpeg";

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

  501.     const char *version;

  502.     int length;

  503. 

  504.     mxf_write_metadata_key(pb, 0x013000);

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

  506. 

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

  508.         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);

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

  510.     klv_encode_ber_length(pb, length);

  511. 

  512.     // write uid

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

  514.     mxf_write_uuid(pb, Identification, 0);

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

  516. 

  517.     // write generation uid

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

  519.     mxf_write_uuid(pb, Identification, 1);

  520. 

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

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

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

  524. 

  525.     // write product uid

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

  527.     mxf_write_uuid(pb, Identification, 2);

  528. 

  529.     // modification date

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

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

  532. }

  533. 

  534. static void mxf_write_content_storage(AVFormatContext *s)

  535. {

  536.     ByteIOContext *pb = s->pb;

  537. 

  538.     mxf_write_metadata_key(pb, 0x011800);

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

  540.     klv_encode_ber_length(pb, 92);

  541. 

  542.     // write uid

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

  544.     mxf_write_uuid(pb, ContentStorage, 0);

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

  546. 

  547.     // write package reference

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

  549.     mxf_write_refs_count(pb, 2);

  550.     mxf_write_uuid(pb, MaterialPackage, 0);

  551.     mxf_write_uuid(pb, SourcePackage, 0);

  552. 

  553.     // write essence container data

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

  555.     mxf_write_refs_count(pb, 1);

  556.     mxf_write_uuid(pb, EssenceContainerData, 0);

  557. }

  558. 

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

  560. {

  561.     MXFContext *mxf = s->priv_data;

  562.     ByteIOContext *pb = s->pb;

  563.     MXFStreamContext *sc = st->priv_data;

  564. 

  565.     mxf_write_metadata_key(pb, 0x013b00);

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

  567.     klv_encode_ber_length(pb, 80);

  568. 

  569.     // write track uid

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

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

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

  573. 

  574.     // write track id

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

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

  577. 

  578.     // write track number

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

  580.     if (type == MaterialPackage)

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

  582.     else

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

  584. 

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

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

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

  588. 

  589.     // write origin

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

  591.     put_be64(pb, 0);

  592. 

  593.     // write sequence refs

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

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

  596. }

  597. 

  598. 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 };

  599. 

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

  601. {

  602.     MXFContext *mxf = s->priv_data;

  603.     ByteIOContext *pb = s->pb;

  604. 

  605.     // find data define uls

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

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

  608.         put_buffer(pb, smpte_12m_timecode_track_data_ul, 16);

  609.     else {

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

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

  612.     }

  613. 

  614.     // write duration

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

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

  617. }

  618. 

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

  620. {

  621.     MXFContext *mxf = s->priv_data;

  622.     ByteIOContext *pb = s->pb;

  623.     enum MXFMetadataSetType component;

  624. 

  625.     mxf_write_metadata_key(pb, 0x010f00);

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

  627.     klv_encode_ber_length(pb, 80);

  628. 

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

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

  631. 

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

  633.     mxf_write_common_fields(s, st);

  634. 

  635.     // write structural component

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

  637.     mxf_write_refs_count(pb, 1);

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

  639.         component = TimecodeComponent;

  640.     else if (type == MaterialPackage)

  641.         component = SourceClip;

  642.     else

  643.         component = SourceClip+TypeBottom;

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

  645. }

  646. 

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

  648. {

  649.     MXFContext *mxf = s->priv_data;

  650.     ByteIOContext *pb = s->pb;

  651. 

  652.     mxf_write_metadata_key(pb, 0x011400);

  653.     klv_encode_ber_length(pb, 75);

  654. 

  655.     // UID

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

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

  658. 

  659.     mxf_write_common_fields(s, st);

  660. 

  661.     // Start Time Code

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

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

  664. 

  665.     // Rounded Time Code Base

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

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

  668. 

  669.     // Drop Frame

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

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

  672. }

  673. 

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

  675. {

  676.     ByteIOContext *pb = s->pb;

  677.     int i;

  678. 

  679.     mxf_write_metadata_key(pb, 0x011100);

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

  681.     klv_encode_ber_length(pb, 108);

  682. 

  683.     // write uid

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

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

  686. 

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

  688.     mxf_write_common_fields(s, st);

  689. 

  690.     // write start_position

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

  692.     put_be64(pb, 0);

  693. 

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

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

  696.     if (type == SourcePackage) {

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

  698.             put_be64(pb, 0);

  699.     } else

  700.         mxf_write_umid(pb, SourcePackage, 0);

  701. 

  702.     // write source track id

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

  704.     if (type == SourcePackage)

  705.         put_be32(pb, 0);

  706.     else

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

  708. }

  709. 

  710. static void mxf_write_multi_descriptor(AVFormatContext *s)

  711. {

  712.     MXFContext *mxf = s->priv_data;

  713.     ByteIOContext *pb = s->pb;

  714.     const uint8_t *ul;

  715.     int i;

  716. 

  717.     mxf_write_metadata_key(pb, 0x014400);

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

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

  720. 

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

  722.     mxf_write_uuid(pb, MultipleDescriptor, 0);

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

  724. 

  725.     // write sample rate

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

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

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

  729. 

  730.     // write essence container ul

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

  732.     if (mxf->essence_container_count > 1)

  733.         ul = multiple_desc_ul;

  734.     else {

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

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

  737.     }

  738.     put_buffer(pb, ul, 16);

  739. 

  740.     // write sub descriptor refs

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

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

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

  744.         mxf_write_uuid(pb, SubDescriptor, i);

  745. }

  746. 

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

  748. {

  749.     MXFContext *mxf = s->priv_data;

  750.     MXFStreamContext *sc = st->priv_data;

  751.     ByteIOContext *pb = s->pb;

  752. 

  753.     put_buffer(pb, key, 16);

  754.     klv_encode_ber_length(pb, size);

  755. 

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

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

  758. 

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

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

  761. 

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

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

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

  765. 

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

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

  768. }

  769. 

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

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

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

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

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

  775. 

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

  777. {

  778.     MXFStreamContext *sc = st->priv_data;

  779.     ByteIOContext *pb = s->pb;

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

  781.     int display_height;

  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.     mxf_write_local_tag(pb, 8, 0x320E);

  841.     put_be32(pb, sc->aspect_ratio.num);

  842.     put_be32(pb, sc->aspect_ratio.den);

  843. 

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

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

  846. }

  847. 

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

  849. {

  850.     MXFStreamContext *sc = st->priv_data;

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

  852. }

  853. 

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

  855. {

  856.     MXFStreamContext *sc = st->priv_data;

  857.     ByteIOContext *pb = s->pb;

  858. 

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

  860. 

  861.     // bit rate

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

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

  864. }

  865. 

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

  867. {

  868.     ByteIOContext *pb = s->pb;

  869. 

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

  871. 

  872.     // audio locked

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

  874.     put_byte(pb, 1);

  875. 

  876.     // write audio sampling rate

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

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

  879.     put_be32(pb, 1);

  880. 

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

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

  883. 

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

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

  886. }

  887. 

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

  889. {

  890.     ByteIOContext *pb = s->pb;

  891. 

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

  893. 

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

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

  896. 

  897.     // avg bytes per sec

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

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

  900. }

  901. 

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

  903. {

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

  905. }

  906. 

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

  908. {

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

  910. }

  911. 

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

  913. {

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

  915. }

  916. 

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

  918. {

  919.     MXFContext *mxf = s->priv_data;

  920.     ByteIOContext *pb = s->pb;

  921.     int i, track_count;

  922. 

  923.     if (type == MaterialPackage) {

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

  925.         mxf_write_metadata_key(pb, 0x013600);

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

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

  928.     } else {

  929.         track_count = s->nb_streams;

  930.         mxf_write_metadata_key(pb, 0x013700);

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

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

  933.     }

  934. 

  935.     // write uid

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

  937.     mxf_write_uuid(pb, type, 0);

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

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

  940. 

  941.     // write package umid

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

  943.     mxf_write_umid(pb, type, 0);

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

  945. 

  946.     // package creation date

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

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

  949. 

  950.     // package modified date

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

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

  953. 

  954.     // write track refs

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

  956.     mxf_write_refs_count(pb, track_count);

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

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

  959.     if (type == MaterialPackage)

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

  961. 

  962.     // write multiple descriptor reference

  963.     if (type == SourcePackage) {

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

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

  966.             mxf_write_uuid(pb, MultipleDescriptor, 0);

  967.             mxf_write_multi_descriptor(s);

  968.         } else

  969.             mxf_write_uuid(pb, SubDescriptor, 0);

  970.     } else {

  971.         // write timecode track

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

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

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

  975.     }

  976. 

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

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

  979.         mxf_write_track(s, st, type);

  980.         mxf_write_sequence(s, st, type);

  981.         mxf_write_structural_component(s, st, type);

  982. 

  983.         if (type == SourcePackage) {

  984.             MXFStreamContext *sc = st->priv_data;

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

  986.         }

  987.     }

  988. }

  989. 

  990. static int mxf_write_essence_container_data(AVFormatContext *s)

  991. {

  992.     ByteIOContext *pb = s->pb;

  993. 

  994.     mxf_write_metadata_key(pb, 0x012300);

  995.     klv_encode_ber_length(pb, 72);

  996. 

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

  998.     mxf_write_uuid(pb, EssenceContainerData, 0);

  999. 

  1000.     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID

  1001.     mxf_write_umid(pb, SourcePackage, 0);

  1002. 

  1003.     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID

  1004.     put_be32(pb, 1);

  1005. 

  1006.     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID

  1007.     put_be32(pb, 2);

  1008. 

  1009.     return 0;

  1010. }

  1011. 

  1012. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  1013. {

  1014.     mxf_write_preface(s);

  1015.     mxf_write_identification(s);

  1016.     mxf_write_content_storage(s);

  1017.     mxf_write_package(s, MaterialPackage);

  1018.     mxf_write_package(s, SourcePackage);

  1019.     mxf_write_essence_container_data(s);

  1020.     return 0;

  1021. }

  1022. 

  1023. static unsigned klv_fill_size(uint64_t size)

  1024. {

  1025.     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));

  1026.     if (pad < 20) // smallest fill item possible

  1027.         return pad + KAG_SIZE;

  1028.     else

  1029.         return pad & (KAG_SIZE-1);

  1030. }

  1031. 

  1032. static void mxf_write_index_table_segment(AVFormatContext *s)

  1033. {

  1034.     MXFContext *mxf = s->priv_data;

  1035.     ByteIOContext *pb = s->pb;

  1036.     int i, j;

  1037.     int temporal_reordering = 0;

  1038.     int key_index = mxf->last_key_index;

  1039. 

  1040.     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);

  1041. 

  1042.     if (!mxf->edit_units_count && !mxf->edit_unit_byte_count)

  1043.         return;

  1044. 

  1045.     put_buffer(pb, index_table_segment_key, 16);

  1046. 

  1047.     if (mxf->edit_unit_byte_count) {

  1048.         klv_encode_ber_length(pb, 85);

  1049.     } else {

  1050.         klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1)*6 +

  1051.                               12+mxf->edit_units_count*(11+mxf->slice_count*4));

  1052.     }

  1053. 

  1054.     // instance id

  1055.     mxf_write_local_tag(pb, 16, 0x3C0A);

  1056.     mxf_write_uuid(pb, IndexTableSegment, 0);

  1057. 

  1058.     // index edit rate

  1059.     mxf_write_local_tag(pb, 8, 0x3F0B);

  1060.     put_be32(pb, mxf->time_base.num);

  1061.     put_be32(pb, mxf->time_base.den);

  1062. 

  1063.     // index start position

  1064.     mxf_write_local_tag(pb, 8, 0x3F0C);

  1065.     put_be64(pb, mxf->last_indexed_edit_unit);

  1066. 

  1067.     // index duration

  1068.     mxf_write_local_tag(pb, 8, 0x3F0D);

  1069.     put_be64(pb, mxf->edit_units_count);

  1070. 

  1071.     // edit unit byte count

  1072.     mxf_write_local_tag(pb, 4, 0x3F05);

  1073.     put_be32(pb, mxf->edit_unit_byte_count);

  1074. 

  1075.     // index sid

  1076.     mxf_write_local_tag(pb, 4, 0x3F06);

  1077.     put_be32(pb, 2);

  1078. 

  1079.     // body sid

  1080.     mxf_write_local_tag(pb, 4, 0x3F07);

  1081.     put_be32(pb, 1);

  1082. 

  1083.     // real slice count - 1

  1084.     mxf_write_local_tag(pb, 1, 0x3F08);

  1085.     put_byte(pb, mxf->slice_count);

  1086. 

  1087.     if (!mxf->edit_unit_byte_count) {

  1088.         // delta entry array

  1089.         mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);

  1090.         put_be32(pb, s->nb_streams+1); // num of entries

  1091.         put_be32(pb, 6);               // size of one entry

  1092.         // write system item delta entry

  1093.         put_byte(pb, 0);

  1094.         put_byte(pb, 0); // slice entry

  1095.         put_be32(pb, 0); // element delta

  1096.         for (i = 0; i < s->nb_streams; i++) {

  1097.             AVStream *st = s->streams[i];

  1098.             MXFStreamContext *sc = st->priv_data;

  1099.             put_byte(pb, sc->temporal_reordering);

  1100.             if (sc->temporal_reordering)

  1101.                 temporal_reordering = 1;

  1102.             if (i == 0) { // video track

  1103.                 put_byte(pb, 0); // slice number

  1104.                 put_be32(pb, KAG_SIZE); // system item size including klv fill

  1105.             } else { // audio track

  1106.                 unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;

  1107.                 audio_frame_size += klv_fill_size(audio_frame_size);

  1108.                 put_byte(pb, 1);

  1109.                 put_be32(pb, (i-1)*audio_frame_size); // element delta

  1110.             }

  1111.         }

  1112. 

  1113.         mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);

  1114.         put_be32(pb, mxf->edit_units_count);  // num of entries

  1115.         put_be32(pb, 11+mxf->slice_count*4);  // size of one entry

  1116.         for (i = 0; i < mxf->edit_units_count; i++) {

  1117.             if (temporal_reordering) {

  1118.                 int temporal_offset = 0;

  1119.                 for (j = i+1; j < mxf->edit_units_count; j++) {

  1120.                     temporal_offset++;

  1121.                     if (mxf->index_entries[j].flags & 0x10) { // backward prediction

  1122.                         // next is not b, so is reordered

  1123.                         if (!(mxf->index_entries[i+1].flags & 0x10)) {

  1124.                             if ((mxf->index_entries[i].flags & 0x11) == 0) // i frame

  1125.                                 temporal_offset = 0;

  1126.                             else

  1127.                                 temporal_offset = -temporal_offset;

  1128.                         }

  1129.                         break;

  1130.                     }

  1131.                 }

  1132.                 put_byte(pb, temporal_offset);

  1133.             } else

  1134.                 put_byte(pb, 0);

  1135.             if (!(mxf->index_entries[i].flags & 0x33)) { // I frame

  1136.                 mxf->last_key_index = key_index;

  1137.                 key_index = i;

  1138.             }

  1139.             if (mxf->index_entries[i].flags & 0x10 && // backward prediction

  1140.                 !(mxf->index_entries[key_index].flags & 0x80)) { // open gop

  1141.                 put_byte(pb, mxf->last_key_index - i);

  1142.             } else {

  1143.                 put_byte(pb, key_index - i); // key frame offset

  1144.                 if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward

  1145.                     mxf->last_key_index = key_index;

  1146.             }

  1147.             put_byte(pb, mxf->index_entries[i].flags);

  1148.             // stream offset

  1149.             put_be64(pb, mxf->index_entries[i].offset);

  1150.             if (s->nb_streams > 1)

  1151.                 put_be32(pb, mxf->index_entries[i].slice_offset);

  1152.         }

  1153. 

  1154.         mxf->last_key_index = key_index - mxf->edit_units_count;

  1155.         mxf->last_indexed_edit_unit += mxf->edit_units_count;

  1156.         mxf->edit_units_count = 0;

  1157.     }

  1158. }

  1159. 

  1160. static void mxf_write_klv_fill(AVFormatContext *s)

  1161. {

  1162.     unsigned pad = klv_fill_size(url_ftell(s->pb));

  1163.     if (pad) {

  1164.         put_buffer(s->pb, klv_fill_key, 16);

  1165.         pad -= 16 + 4;

  1166.         klv_encode_ber4_length(s->pb, pad);

  1167.         for (; pad; pad--)

  1168.             put_byte(s->pb, 0);

  1169.         assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));

  1170.     }

  1171. }

  1172. 

  1173. static void mxf_write_partition(AVFormatContext *s, int bodysid,

  1174.                                 int indexsid,

  1175.                                 const uint8_t *key, int write_metadata)

  1176. {

  1177.     MXFContext *mxf = s->priv_data;

  1178.     ByteIOContext *pb = s->pb;

  1179.     int64_t header_byte_count_offset;

  1180.     unsigned index_byte_count = 0;

  1181.     uint64_t partition_offset = url_ftell(pb);

  1182. 

  1183.     if (!mxf->edit_unit_byte_count && mxf->edit_units_count)

  1184.         index_byte_count = 85 + 12+(s->nb_streams+1)*6 +

  1185.             12+mxf->edit_units_count*(11+mxf->slice_count*4);

  1186.     else if (mxf->edit_unit_byte_count && indexsid)

  1187.         index_byte_count = 85;

  1188. 

  1189.     if (index_byte_count) {

  1190.         // add encoded ber length

  1191.         index_byte_count += 16 + klv_ber_length(index_byte_count);

  1192.         index_byte_count += klv_fill_size(index_byte_count);

  1193.     }

  1194. 

  1195.     if (!memcmp(key, body_partition_key, 16)) {

  1196.         mxf->body_partition_offset =

  1197.             av_realloc(mxf->body_partition_offset,

  1198.                        (mxf->body_partitions_count+1)*

  1199.                        sizeof(*mxf->body_partition_offset));

  1200.         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;

  1201.     }

  1202. 

  1203.     // write klv

  1204.     put_buffer(pb, key, 16);

  1205.     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);

  1206. 

  1207.     // write partition value

  1208.     put_be16(pb, 1); // majorVersion

  1209.     put_be16(pb, 2); // minorVersion

  1210.     put_be32(pb, KAG_SIZE); // KAGSize

  1211. 

  1212.     put_be64(pb, partition_offset); // ThisPartition

  1213. 

  1214.     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)

  1215.         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition

  1216.     else if (!memcmp(key, footer_partition_key, 16) && mxf->body_partitions_count)

  1217.         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition

  1218.     else

  1219.         put_be64(pb, 0);

  1220. 

  1221.     put_be64(pb, mxf->footer_partition_offset); // footerPartition

  1222. 

  1223.     // set offset

  1224.     header_byte_count_offset = url_ftell(pb);

  1225.     put_be64(pb, 0); // headerByteCount, update later

  1226. 

  1227.     // indexTable

  1228.     put_be64(pb, index_byte_count); // indexByteCount

  1229.     put_be32(pb, index_byte_count ? indexsid : 0); // indexSID

  1230. 

  1231.     // BodyOffset

  1232.     if (bodysid && mxf->edit_units_count && mxf->body_partitions_count) {

  1233.         put_be64(pb, mxf->body_offset);

  1234.     } else

  1235.         put_be64(pb, 0);

  1236. 

  1237.     put_be32(pb, bodysid); // bodySID

  1238. 

  1239.     // operational pattern

  1240.     if (s->nb_streams > 1) {

  1241.         put_buffer(pb, op1a_ul, 14);

  1242.         put_be16(pb, 0x0900); // multi track

  1243.     } else {

  1244.         put_buffer(pb, op1a_ul, 16);

  1245.     }

  1246. 

  1247.     // essence container

  1248.     mxf_write_essence_container_refs(s);

  1249. 

  1250.     if (write_metadata) {

  1251.         // mark the start of the headermetadata and calculate metadata size

  1252.         int64_t pos, start;

  1253.         unsigned header_byte_count;

  1254. 

  1255.         mxf_write_klv_fill(s);

  1256.         start = url_ftell(s->pb);

  1257.         mxf_write_primer_pack(s);

  1258.         mxf_write_header_metadata_sets(s);

  1259.         pos = url_ftell(s->pb);

  1260.         header_byte_count = pos - start + klv_fill_size(pos);

  1261. 

  1262.         // update header_byte_count

  1263.         url_fseek(pb, header_byte_count_offset, SEEK_SET);

  1264.         put_be64(pb, header_byte_count);

  1265.         url_fseek(pb, pos, SEEK_SET);

  1266.     }

  1267. 

  1268.     put_flush_packet(pb);

  1269. }

  1270. 

  1271. static const UID mxf_mpeg2_codec_uls[] = {

  1272.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame

  1273.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP

  1274.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame

  1275.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP

  1276.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame

  1277.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP

  1278.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame

  1279.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP

  1280. };

  1281. 

  1282. static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)

  1283. {

  1284.     if (avctx->profile == 4) { // Main

  1285.         if (avctx->level == 8) // Main

  1286.             return avctx->gop_size ?

  1287.                 &mxf_mpeg2_codec_uls[1] :

  1288.                 &mxf_mpeg2_codec_uls[0];

  1289.         else if (avctx->level == 4) // High

  1290.             return avctx->gop_size ?

  1291.                 &mxf_mpeg2_codec_uls[5] :

  1292.                 &mxf_mpeg2_codec_uls[4];

  1293.     } else if (avctx->profile == 0) { // 422

  1294.         if (avctx->level == 5) // Main

  1295.             return avctx->gop_size ?

  1296.                 &mxf_mpeg2_codec_uls[3] :

  1297.                 &mxf_mpeg2_codec_uls[2];

  1298.         else if (avctx->level == 2) // High

  1299.             return avctx->gop_size ?

  1300.                 &mxf_mpeg2_codec_uls[7] :

  1301.                 &mxf_mpeg2_codec_uls[6];

  1302.     }

  1303.     return NULL;

  1304. }

  1305. 

  1306. static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt, int *flags)

  1307. {

  1308.     MXFStreamContext *sc = st->priv_data;

  1309.     MXFContext *mxf = s->priv_data;

  1310.     uint32_t c = -1;

  1311.     int i;

  1312. 

  1313.     *flags = 0;

  1314. 

  1315.     for(i = 0; i < pkt->size - 4; i++) {

  1316.         c = (c<<8) + pkt->data[i];

  1317.         if (c == 0x1B5) {

  1318.             if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext

  1319.                 st->codec->profile = pkt->data[i+1] & 0x07;

  1320.                 st->codec->level   = pkt->data[i+2] >> 4;

  1321.             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext

  1322.                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame

  1323.                 break;

  1324.             }

  1325.         } else if (c == 0x1b8) { // gop

  1326.             if (i + 4 < pkt->size) {

  1327.                 if (pkt->data[i+4]>>6 & 0x01) // closed

  1328.                     *flags |= 0x80; // random access

  1329.                 if (!mxf->header_written) {

  1330.                     unsigned hours   =  (pkt->data[i+1]>>2) & 0x1f;

  1331.                     unsigned minutes = ((pkt->data[i+1] & 0x03) << 4) | (pkt->data[i+2]>>4);

  1332.                     unsigned seconds = ((pkt->data[i+2] & 0x07) << 3) | (pkt->data[i+3]>>5);

  1333.                     unsigned frames  = ((pkt->data[i+3] & 0x1f) << 1) | (pkt->data[i+4]>>7);

  1334.                     mxf->timecode_drop_frame = !!(pkt->data[i+1] & 0x80);

  1335.                     mxf->timecode_start = (hours*3600 + minutes*60 + seconds) *

  1336.                         mxf->timecode_base + frames;

  1337.                     if (mxf->timecode_drop_frame) {

  1338.                         unsigned tminutes = 60 * hours + minutes;

  1339.                         mxf->timecode_start -= 2 * (tminutes - tminutes / 10);

  1340.                     }

  1341.                     av_log(s, AV_LOG_DEBUG, "frame %d %d:%d:%d%c%d\n", mxf->timecode_start,

  1342.                            hours, minutes, seconds, mxf->timecode_drop_frame ? ';':':', frames);

  1343.                 }

  1344.             }

  1345.         } else if (c == 0x1b3) { // seq

  1346.             *flags |= 0x40;

  1347.             if (i + 4 < pkt->size) {

  1348.                 switch ((pkt->data[i+4]>>4) & 0xf) {

  1349.                 case 2:  sc->aspect_ratio = (AVRational){  4,  3}; break;

  1350.                 case 3:  sc->aspect_ratio = (AVRational){ 16,  9}; break;

  1351.                 case 4:  sc->aspect_ratio = (AVRational){221,100}; break;

  1352.                 default:

  1353.                     av_reduce(&sc->aspect_ratio.num, &sc->aspect_ratio.den,

  1354.                               st->codec->width, st->codec->height, 1024*1024);

  1355.                 }

  1356.             }

  1357.         } else if (c == 0x100) { // pic

  1358.             int pict_type = (pkt->data[i+2]>>3) & 0x07;

  1359.             if (pict_type == 2) { // P frame

  1360.                 *flags |= 0x22;

  1361.                 st->codec->gop_size = 1;

  1362.             } else if (pict_type == 3) { // B frame

  1363.                 *flags |= 0x33;

  1364.                 sc->temporal_reordering = -1;

  1365.             } else if (!pict_type) {

  1366.                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");

  1367.                 return 0;

  1368.             }

  1369.         }

  1370.     }

  1371.     if (s->oformat != &mxf_d10_muxer)

  1372.         sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);

  1373.     return !!sc->codec_ul;

  1374. }

  1375. 

  1376. static uint64_t mxf_parse_timestamp(time_t timestamp)

  1377. {

  1378.     struct tm *time = localtime(&timestamp);

  1379.     return (uint64_t)(time->tm_year+1900) << 48 |

  1380.            (uint64_t)(time->tm_mon+1)     << 40 |

  1381.            (uint64_t) time->tm_mday       << 32 |

  1382.                       time->tm_hour       << 24 |

  1383.                       time->tm_min        << 16 |

  1384.                       time->tm_sec        << 8;

  1385. }

  1386. 

  1387. static int mxf_write_header(AVFormatContext *s)

  1388. {

  1389.     MXFContext *mxf = s->priv_data;

  1390.     int i;

  1391.     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};

  1392.     const int *samples_per_frame = NULL;

  1393. 

  1394.     for (i = 0; i < s->nb_streams; i++) {

  1395.         AVStream *st = s->streams[i];

  1396.         MXFStreamContext *sc = av_mallocz(sizeof(*sc));

  1397.         if (!sc)

  1398.             return AVERROR(ENOMEM);

  1399.         st->priv_data = sc;

  1400. 

  1401.         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {

  1402.             if (i != 0) {

  1403.                 av_log(s, AV_LOG_ERROR, "video stream must be first track\n");

  1404.                 return -1;

  1405.             }

  1406.             if (fabs(av_q2d(st->codec->time_base) - 1/25.0) < 0.0001) {

  1407.                 samples_per_frame = PAL_samples_per_frame;

  1408.                 mxf->time_base = (AVRational){ 1, 25 };

  1409.                 mxf->timecode_base = 25;

  1410.             } else if (fabs(av_q2d(st->codec->time_base) - 1001/30000.0) < 0.0001) {

  1411.                 samples_per_frame = NTSC_samples_per_frame;

  1412.                 mxf->time_base = (AVRational){ 1001, 30000 };

  1413.                 mxf->timecode_base = 30;

  1414.             } else {

  1415.                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");

  1416.                 return -1;

  1417.             }

  1418.             av_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);

  1419.             if (s->oformat == &mxf_d10_muxer) {

  1420.                 if (st->codec->bit_rate == 50000000)

  1421.                     if (mxf->time_base.den == 25) sc->index = 3;

  1422.                     else                          sc->index = 5;

  1423.                 else if (st->codec->bit_rate == 40000000)

  1424.                     if (mxf->time_base.den == 25) sc->index = 7;

  1425.                     else                          sc->index = 9;

  1426.                 else if (st->codec->bit_rate == 30000000)

  1427.                     if (mxf->time_base.den == 25) sc->index = 11;

  1428.                     else                          sc->index = 13;

  1429.                 else {

  1430.                     av_log(s, AV_LOG_ERROR, "error MXF D-10 only support 30/40/50 mbit/s\n");

  1431.                     return -1;

  1432.                 }

  1433. 

  1434.                 mxf->edit_unit_byte_count = KAG_SIZE; // system element

  1435.                 mxf->edit_unit_byte_count += 16 + 4 + (uint64_t)st->codec->bit_rate *

  1436.                     mxf->time_base.num / (8*mxf->time_base.den);

  1437.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1438.                 mxf->edit_unit_byte_count += 16 + 4 + 4 + samples_per_frame[0]*8*4;

  1439.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1440.             }

  1441.         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {

  1442.             if (st->codec->sample_rate != 48000) {

  1443.                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");

  1444.                 return -1;

  1445.             }

  1446.             av_set_pts_info(st, 64, 1, st->codec->sample_rate);

  1447.             if (s->oformat == &mxf_d10_muxer) {

  1448.                 if (st->index != 1) {

  1449.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support one audio track\n");

  1450.                     return -1;

  1451.                 }

  1452.                 if (st->codec->codec_id != CODEC_ID_PCM_S16LE &&

  1453.                     st->codec->codec_id != CODEC_ID_PCM_S24LE) {

  1454.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support 16 or 24 bits le audio\n");

  1455.                 }

  1456.                 sc->index = ((MXFStreamContext*)s->streams[0]->priv_data)->index + 1;

  1457.             } else

  1458.             mxf->slice_count = 1;

  1459.         }

  1460. 

  1461.         if (!sc->index) {

  1462.             sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);

  1463.             if (sc->index == -1) {

  1464.                 av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "

  1465.                        "codec not currently supported in container\n", i);

  1466.                 return -1;

  1467.             }

  1468.         }

  1469. 

  1470.         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;

  1471. 

  1472.         if (!present[sc->index]) {

  1473.             present[sc->index] = 1;

  1474.             mxf->essence_container_count++;

  1475.         } else

  1476.             present[sc->index]++;

  1477. 

  1478.         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);

  1479.         sc->track_essence_element_key[15] = present[sc->index];

  1480.         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);

  1481.     }

  1482. 

  1483.     if (s->oformat == &mxf_d10_muxer) {

  1484.         mxf->essence_container_count = 1;

  1485.     }

  1486. 

  1487.     for (i = 0; i < s->nb_streams; i++) {

  1488.         MXFStreamContext *sc = s->streams[i]->priv_data;

  1489.         // update element count

  1490.         sc->track_essence_element_key[13] = present[sc->index];

  1491.         sc->order = AV_RB32(sc->track_essence_element_key+12);

  1492.     }

  1493. 

  1494.     mxf->timestamp = mxf_parse_timestamp(s->timestamp);

  1495.     mxf->duration = -1;

  1496. 

  1497.     mxf->timecode_track = av_mallocz(sizeof(*mxf->timecode_track));

  1498.     if (!mxf->timecode_track)

  1499.         return AVERROR(ENOMEM);

  1500.     mxf->timecode_track->priv_data = av_mallocz(sizeof(MXFStreamContext));

  1501.     if (!mxf->timecode_track->priv_data)

  1502.         return AVERROR(ENOMEM);

  1503.     mxf->timecode_track->index = s->nb_streams;

  1504. 

  1505.     if (!samples_per_frame)

  1506.         samples_per_frame = PAL_samples_per_frame;

  1507. 

  1508.     if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)

  1509.         return -1;

  1510. 

  1511.     return 0;

  1512. }

  1513. 

  1514. static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };

  1515. 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 };

  1516. 

  1517. static uint32_t ff_framenum_to_12m_time_code(unsigned frame, int drop, int fps)

  1518. {

  1519.     return (0                                    << 31) | // color frame flag

  1520.            (0                                    << 30) | // drop  frame flag

  1521.            ( ((frame % fps) / 10)                << 28) | // tens  of frames

  1522.            ( ((frame % fps) % 10)                << 24) | // units of frames

  1523.            (0                                    << 23) | // field phase (NTSC), b0 (PAL)

  1524.            ((((frame / fps) % 60) / 10)          << 20) | // tens  of seconds

  1525.            ((((frame / fps) % 60) % 10)          << 16) | // units of seconds

  1526.            (0                                    << 15) | // b0 (NTSC), b2 (PAL)

  1527.            ((((frame / (fps * 60)) % 60) / 10)   << 12) | // tens  of minutes

  1528.            ((((frame / (fps * 60)) % 60) % 10)   <<  8) | // units of minutes

  1529.            (0                                    <<  7) | // b1

  1530.            (0                                    <<  6) | // b2 (NSC), field phase (PAL)

  1531.            ((((frame / (fps * 3600) % 24)) / 10) <<  4) | // tens  of hours

  1532.            (  (frame / (fps * 3600) % 24)) % 10;          // units of hours

  1533. }

  1534. 

  1535. static void mxf_write_system_item(AVFormatContext *s)

  1536. {

  1537.     MXFContext *mxf = s->priv_data;

  1538.     ByteIOContext *pb = s->pb;

  1539.     unsigned frame;

  1540.     uint32_t time_code;

  1541. 

  1542.     frame = mxf->timecode_start + mxf->last_indexed_edit_unit + mxf->edit_units_count;

  1543. 

  1544.     // write system metadata pack

  1545.     put_buffer(pb, system_metadata_pack_key, 16);

  1546.     klv_encode_ber4_length(pb, 57);

  1547.     put_byte(pb, 0x5c); // UL, user date/time stamp, picture and sound item present

  1548.     put_byte(pb, 0x04); // content package rate

  1549.     put_byte(pb, 0x00); // content package type

  1550.     put_be16(pb, 0x00); // channel handle

  1551.     put_be16(pb, frame); // continuity count

  1552.     if (mxf->essence_container_count > 1)

  1553.         put_buffer(pb, multiple_desc_ul, 16);

  1554.     else {

  1555.         MXFStreamContext *sc = s->streams[0]->priv_data;

  1556.         put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);

  1557.     }

  1558.     put_byte(pb, 0);

  1559.     put_be64(pb, 0);

  1560.     put_be64(pb, 0); // creation date/time stamp

  1561. 

  1562.     put_byte(pb, 0x81); // SMPTE 12M time code

  1563.     time_code = ff_framenum_to_12m_time_code(frame, mxf->timecode_drop_frame, mxf->timecode_base);

  1564.     put_be32(pb, time_code);

  1565.     put_be32(pb, 0); // binary group data

  1566.     put_be64(pb, 0);

  1567. 

  1568.     // write system metadata package set

  1569.     put_buffer(pb, system_metadata_package_set_key, 16);

  1570.     klv_encode_ber4_length(pb, 35);

  1571.     put_byte(pb, 0x83); // UMID

  1572.     put_be16(pb, 0x20);

  1573.     mxf_write_umid(pb, SourcePackage, 0);

  1574. }

  1575. 

  1576. static void mxf_write_d10_video_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1577. {

  1578.     MXFContext *mxf = s->priv_data;

  1579.     ByteIOContext *pb = s->pb;

  1580.     int packet_size = (uint64_t)st->codec->bit_rate*mxf->time_base.num /

  1581.         (8*mxf->time_base.den); // frame size

  1582.     int pad;

  1583. 

  1584.     packet_size += 16 + 4;

  1585.     packet_size += klv_fill_size(packet_size);

  1586. 

  1587.     klv_encode_ber4_length(pb, pkt->size);

  1588.     put_buffer(pb, pkt->data, pkt->size);

  1589. 

  1590.     // ensure CBR muxing by padding to correct video frame size

  1591.     pad = packet_size - pkt->size - 16 - 4;

  1592.     if (pad > 20) {

  1593.         put_buffer(s->pb, klv_fill_key, 16);

  1594.         pad -= 16 + 4;

  1595.         klv_encode_ber4_length(s->pb, pad);

  1596.         for (; pad; pad--)

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

  1598.         assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));

  1599.     } else {

  1600.         av_log(s, AV_LOG_WARNING, "cannot fill d-10 video packet\n");

  1601.         for (; pad > 0; pad--)

  1602.             put_byte(s->pb, 0);

  1603.     }

  1604. }

  1605. 

  1606. static void mxf_write_d10_audio_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1607. {

  1608.     MXFContext *mxf = s->priv_data;

  1609.     ByteIOContext *pb = s->pb;

  1610.     int frame_size = (pkt->size<<3) /

  1611.         (st->codec->channels*av_get_bits_per_sample(st->codec->codec_id));

  1612.     uint8_t *samples = pkt->data;

  1613.     uint8_t *end = pkt->data + pkt->size;

  1614.     int i;

  1615. 

  1616.     klv_encode_ber4_length(pb, 4 + frame_size*4*8);

  1617. 

  1618.     put_byte(pb, (frame_size == 1920 ? 0 : (mxf->edit_units_count-1) % 5 + 1));

  1619.     put_le16(pb, frame_size);

  1620.     put_byte(pb, (1<<st->codec->channels)-1);

  1621. 

  1622.     while (samples < end) {

  1623.         for (i = 0; i < st->codec->channels; i++) {

  1624.             uint32_t sample;

  1625.             if (st->codec->codec_id == CODEC_ID_PCM_S24LE) {

  1626.                 sample = (AV_RL24(samples)<< 4)|((samples==pkt->data)<<3) | i;

  1627.                 samples += 3;

  1628.             } else {

  1629.                 sample = (AV_RL16(samples)<<12)|((samples==pkt->data)<<3) | i;

  1630.                 samples += 2;

  1631.             }

  1632.             put_le32(pb, sample);

  1633.         }

  1634.         for (; i < 8; i++)

  1635.             put_le32(pb, 0);

  1636.     }

  1637. }

  1638. 

  1639. static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)

  1640. {

  1641.     MXFContext *mxf = s->priv_data;

  1642.     ByteIOContext *pb = s->pb;

  1643.     AVStream *st = s->streams[pkt->stream_index];

  1644.     MXFStreamContext *sc = st->priv_data;

  1645.     int flags = 0;

  1646. 

  1647.     if (!mxf->edit_unit_byte_count && !(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {

  1648.         mxf->index_entries = av_realloc(mxf->index_entries,

  1649.             (mxf->edit_units_count + EDIT_UNITS_PER_BODY)*sizeof(*mxf->index_entries));

  1650.         if (!mxf->index_entries) {

  1651.             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");

  1652.             return -1;

  1653.         }

  1654.     }

  1655. 

  1656.     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {

  1657.         if (!mxf_parse_mpeg2_frame(s, st, pkt, &flags)) {

  1658.             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");

  1659.             return -1;

  1660.         }

  1661.     }

  1662. 

  1663.     if (!mxf->header_written) {

  1664.         if (mxf->edit_unit_byte_count) {

  1665.             mxf_write_partition(s, 1, 2, header_open_partition_key, 1);

  1666.             mxf_write_klv_fill(s);

  1667.             mxf_write_index_table_segment(s);

  1668.         } else {

  1669.             mxf_write_partition(s, 0, 0, header_open_partition_key, 1);

  1670.         }

  1671.         mxf->header_written = 1;

  1672.     }

  1673. 

  1674.     if (st->index == 0) {

  1675.         if (!mxf->edit_unit_byte_count &&

  1676.             (!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&

  1677.             !(flags & 0x33)) { // I frame, Gop start

  1678.             mxf_write_klv_fill(s);

  1679.             mxf_write_partition(s, 1, 2, body_partition_key, 0);

  1680. 

  1681.             mxf_write_klv_fill(s);

  1682.             mxf_write_index_table_segment(s);

  1683.         }

  1684. 

  1685.         mxf_write_klv_fill(s);

  1686.         mxf_write_system_item(s);

  1687. 

  1688.         if (!mxf->edit_unit_byte_count) {

  1689.             mxf->index_entries[mxf->edit_units_count].offset = mxf->body_offset;

  1690.             mxf->index_entries[mxf->edit_units_count].flags = flags;

  1691.             mxf->body_offset += KAG_SIZE; // size of system element

  1692.         }

  1693.         mxf->edit_units_count++;

  1694.     } else if (!mxf->edit_unit_byte_count && st->index == 1) {

  1695.         mxf->index_entries[mxf->edit_units_count-1].slice_offset =

  1696.             mxf->body_offset - mxf->index_entries[mxf->edit_units_count-1].offset;

  1697.     }

  1698. 

  1699.     mxf_write_klv_fill(s);

  1700.     put_buffer(pb, sc->track_essence_element_key, 16); // write key

  1701.     if (s->oformat == &mxf_d10_muxer) {

  1702.         if (st->codec->codec_type == CODEC_TYPE_VIDEO)

  1703.             mxf_write_d10_video_packet(s, st, pkt);

  1704.         else

  1705.             mxf_write_d10_audio_packet(s, st, pkt);

  1706.     } else {

  1707.         klv_encode_ber4_length(pb, pkt->size); // write length

  1708.         put_buffer(pb, pkt->data, pkt->size);

  1709.         mxf->body_offset += 16+4+pkt->size + klv_fill_size(16+4+pkt->size);

  1710.     }

  1711. 

  1712.     put_flush_packet(pb);

  1713. 

  1714.     return 0;

  1715. }

  1716. 

  1717. static void mxf_write_random_index_pack(AVFormatContext *s)

  1718. {

  1719.     MXFContext *mxf = s->priv_data;

  1720.     ByteIOContext *pb = s->pb;

  1721.     uint64_t pos = url_ftell(pb);

  1722.     int i;

  1723. 

  1724.     put_buffer(pb, random_index_pack_key, 16);

  1725.     klv_encode_ber_length(pb, 28 + 12*mxf->body_partitions_count);

  1726. 

  1727.     put_be32(pb, 0); // BodySID of header partition

  1728.     put_be64(pb, 0); // offset of header partition

  1729. 

  1730.     for (i = 0; i < mxf->body_partitions_count; i++) {

  1731.         put_be32(pb, 1); // BodySID

  1732.         put_be64(pb, mxf->body_partition_offset[i]);

  1733.     }

  1734. 

  1735.     put_be32(pb, 0); // BodySID of footer partition

  1736.     put_be64(pb, mxf->footer_partition_offset);

  1737. 

  1738.     put_be32(pb, url_ftell(pb) - pos + 4);

  1739. }

  1740. 

  1741. static int mxf_write_footer(AVFormatContext *s)

  1742. {

  1743.     MXFContext *mxf = s->priv_data;

  1744.     ByteIOContext *pb = s->pb;

  1745. 

  1746.     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  1747. 

  1748.     mxf_write_klv_fill(s);

  1749.     mxf->footer_partition_offset = url_ftell(pb);

  1750.     if (mxf->edit_unit_byte_count) { // no need to repeat index

  1751.         mxf_write_partition(s, 0, 0, footer_partition_key, 0);

  1752.     } else {

  1753.         mxf_write_partition(s, 0, 2, footer_partition_key, 0);

  1754. 

  1755.         mxf_write_klv_fill(s);

  1756.         mxf_write_index_table_segment(s);

  1757.     }

  1758. 

  1759.     mxf_write_klv_fill(s);

  1760.     mxf_write_random_index_pack(s);

  1761. 

  1762.     if (!url_is_streamed(s->pb)) {

  1763.         url_fseek(pb, 0, SEEK_SET);

  1764.         if (mxf->edit_unit_byte_count) {

  1765.             mxf_write_partition(s, 1, 2, header_closed_partition_key, 1);

  1766.             mxf_write_klv_fill(s);

  1767.             mxf_write_index_table_segment(s);

  1768.         } else {

  1769.             mxf_write_partition(s, 0, 0, header_closed_partition_key, 1);

  1770.         }

  1771.     }

  1772. 

  1773.     ff_audio_interleave_close(s);

  1774. 

  1775.     av_freep(&mxf->index_entries);

  1776.     av_freep(&mxf->body_partition_offset);

  1777.     av_freep(&mxf->timecode_track->priv_data);

  1778.     av_freep(&mxf->timecode_track);

  1779. 

  1780.     mxf_free(s);

  1781. 

  1782.     return 0;

  1783. }

  1784. 

  1785. static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  1786. {

  1787.     AVPacketList *pktl;

  1788.     int stream_count = 0;

  1789.     int streams[MAX_STREAMS];

  1790. 

  1791.     memset(streams, 0, sizeof(streams));

  1792.     pktl = s->packet_buffer;

  1793.     while (pktl) {

  1794.         //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);

  1795.         if (!streams[pktl->pkt.stream_index])

  1796.             stream_count++;

  1797.         streams[pktl->pkt.stream_index]++;

  1798.         pktl = pktl->next;

  1799.     }

  1800. 

  1801.     if (stream_count && (s->nb_streams == stream_count || flush)) {

  1802.         pktl = s->packet_buffer;

  1803.         if (s->nb_streams != stream_count) {

  1804.             AVPacketList *last = NULL;

  1805.             // find last packet in edit unit

  1806.             while (pktl) {

  1807.                 if (!stream_count || pktl->pkt.stream_index == 0)

  1808.                     break;

  1809.                 last = pktl;

  1810.                 pktl = pktl->next;

  1811.                 stream_count--;

  1812.             }

  1813.             // purge packet queue

  1814.             while (pktl) {

  1815.                 AVPacketList *next = pktl->next;

  1816.                 av_free_packet(&pktl->pkt);

  1817.                 av_freep(&pktl);

  1818.                 pktl = next;

  1819.             }

  1820.             if (last)

  1821.                 last->next = NULL;

  1822.             else {

  1823.                 s->packet_buffer = NULL;

  1824.                 goto out;

  1825.             }

  1826.             pktl = s->packet_buffer;

  1827.         }

  1828. 

  1829.         *out = pktl->pkt;

  1830.         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);

  1831.         s->packet_buffer = pktl->next;

  1832.         av_freep(&pktl);

  1833.         return 1;

  1834.     } else {

  1835.     out:

  1836.         av_init_packet(out);

  1837.         return 0;

  1838.     }

  1839. }

  1840. 

  1841. static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)

  1842. {

  1843.     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;

  1844.     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;

  1845. 

  1846.     return next->dts > pkt->dts ||

  1847.         (next->dts == pkt->dts && sc->order < sc2->order);

  1848. }

  1849. 

  1850. static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  1851. {

  1852.     return ff_audio_rechunk_interleave(s, out, pkt, flush,

  1853.                                mxf_interleave_get_packet, mxf_compare_timestamps);

  1854. }

  1855. 

  1856. AVOutputFormat mxf_muxer = {

  1857.     "mxf",

  1858.     NULL_IF_CONFIG_SMALL("Material eXchange Format"),

  1859.     "application/mxf",

  1860.     "mxf",

  1861.     sizeof(MXFContext),

  1862.     CODEC_ID_PCM_S16LE,

  1863.     CODEC_ID_MPEG2VIDEO,

  1864.     mxf_write_header,

  1865.     mxf_write_packet,

  1866.     mxf_write_footer,

  1867.     AVFMT_NOTIMESTAMPS,

  1868.     NULL,

  1869.     mxf_interleave,

  1870. };

  1871. 

  1872. AVOutputFormat mxf_d10_muxer = {

  1873.     "mxf_d10",

  1874.     NULL_IF_CONFIG_SMALL("Material eXchange Format, D-10 Mapping"),

  1875.     "application/mxf",

  1876.     NULL,

  1877.     sizeof(MXFContext),

  1878.     CODEC_ID_PCM_S16LE,

  1879.     CODEC_ID_MPEG2VIDEO,

  1880.     mxf_write_header,

  1881.     mxf_write_packet,

  1882.     mxf_write_footer,

  1883.     AVFMT_NOTIMESTAMPS,

  1884.     NULL,

  1885.     mxf_interleave,

  1886. };