falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
19904 Commits
32 Branches
283MB
Tree: ecc1330a6d
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from 'ecc1330a6d'
${ noResults }
FFmpeg/libavformat/mxfenc.c

1896 lines
71KB
Raw Blame History 

  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/random_seed.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.     uint32_t instance_number;

  191.     uint8_t umid[16];        ///< unique material identifier

  192. } MXFContext;

  193. 

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

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

  196. 

  197. /**

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

  199.  */

  200. static const uint8_t op1a_ul[]                     = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x09,0x00 };

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

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

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

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

  205. 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

  206. 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

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

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

  209. 

  210. /**

  211.  * partial key for header metadata

  212.  */

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

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

  215. 

  216. /**

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

  218.  */

  219. static const MXFLocalTagPair mxf_local_tag_batch[] = {

  220.     // preface set

  221.     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */

  222.     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */

  223.     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */

  224.     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */

  225.     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */

  226.     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */

  227.     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */

  228.     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */

  229.     // Identification

  230.     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */

  231.     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */

  232.     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */

  233.     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */

  234.     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */

  235.     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */

  236.     // Content Storage

  237.     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */

  238.     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */

  239.     // Essence Container Data

  240.     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */

  241.     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */

  242.     // Package

  243.     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */

  244.     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */

  245.     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */

  246.     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */

  247.     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */

  248.     // Track

  249.     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */

  250.     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */

  251.     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */

  252.     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */

  253.     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */

  254.     // Sequence

  255.     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */

  256.     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */

  257.     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */

  258.     // Source Clip

  259.     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */

  260.     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */

  261.     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */

  262.     // Timecode Component

  263.     { 0x1501, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x05,0x00,0x00}}, /* Start Time Code */

  264.     { 0x1502, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x04,0x01,0x01,0x02,0x06,0x00,0x00}}, /* Rounded Time Code Base */

  265.     { 0x1503, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x04,0x01,0x01,0x05,0x00,0x00,0x00}}, /* Drop Frame */

  266.     // File Descriptor

  267.     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */

  268.     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */

  269.     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */

  270.     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */

  271.     // Generic Picture Essence Descriptor

  272.     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */

  273.     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */

  274.     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */

  275.     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */

  276.     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */

  277.     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */

  278.     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */

  279.     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */

  280.     // CDCI Picture Essence Descriptor

  281.     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */

  282.     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */

  283.     // Generic Sound Essence Descriptor

  284.     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */

  285.     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */

  286.     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */

  287.     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */

  288.     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */

  289.     // Index Table Segment

  290.     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */

  291.     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */

  292.     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */

  293.     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */

  294.     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */

  295.     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */

  296.     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */

  297.     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */

  298.     // MPEG video Descriptor

  299.     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */

  300.     // Wave Audio Essence Descriptor

  301.     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */

  302.     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */

  303. };

  304. 

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

  306. {

  307.     put_buffer(pb, uuid_base, 12);

  308.     put_be16(pb, type);

  309.     put_be16(pb, value);

  310. }

  311. 

  312. static void mxf_write_umid(AVFormatContext *s, int type)

  313. {

  314.     MXFContext *mxf = s->priv_data;

  315.     put_buffer(s->pb, umid_ul, 13);

  316.     put_be24(s->pb, mxf->instance_number);

  317.     put_buffer(s->pb, mxf->umid, 15);

  318.     put_byte(s->pb, type);

  319. }

  320. 

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

  322. {

  323.     put_be32(pb, ref_count);

  324.     put_be32(pb, 16);

  325. }

  326. 

  327. static int klv_ber_length(uint64_t len)

  328. {

  329.     if (len < 128)

  330.         return 1;

  331.     else

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

  333. }

  334. 

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

  336. {

  337.     // Determine the best BER size

  338.     int size;

  339.     if (len < 128) {

  340.         //short form

  341.         put_byte(pb, len);

  342.         return 1;

  343.     }

  344. 

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

  346. 

  347.     // long form

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

  349.     while(size) {

  350.         size--;

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

  352.     }

  353.     return 0;

  354. }

  355. 

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

  357. {

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

  359.     put_be24(pb, len);

  360. }

  361. 

  362. /*

  363.  * Get essence container ul index

  364.  */

  365. static int mxf_get_essence_container_ul_index(enum CodecID id)

  366. {

  367.     int i;

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

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

  370.             return mxf_essence_mappings[i].index;

  371.     return -1;

  372. }

  373. 

  374. static void mxf_write_primer_pack(AVFormatContext *s)

  375. {

  376.     ByteIOContext *pb = s->pb;

  377.     int local_tag_number, i = 0;

  378. 

  379.     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);

  380. 

  381.     put_buffer(pb, primer_pack_key, 16);

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

  383. 

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

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

  386. 

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

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

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

  390.     }

  391. }

  392. 

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

  394. {

  395.     put_be16(pb, tag);

  396.     put_be16(pb, size);

  397. }

  398. 

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

  400. {

  401.     put_buffer(pb, header_metadata_key, 13);

  402.     put_be24(pb, value);

  403. }

  404. 

  405. static void mxf_free(AVFormatContext *s)

  406. {

  407.     int i;

  408. 

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

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

  411.         av_freep(&st->priv_data);

  412.     }

  413. }

  414. 

  415. static const MXFCodecUL *mxf_get_data_definition_ul(int type)

  416. {

  417.     const MXFCodecUL *uls = ff_mxf_data_definition_uls;

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

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

  420.             break;

  421.         uls++;

  422.     }

  423.     return uls;

  424. }

  425. 

  426. static void mxf_write_essence_container_refs(AVFormatContext *s)

  427. {

  428.     MXFContext *c = s->priv_data;

  429.     ByteIOContext *pb = s->pb;

  430.     int i;

  431. 

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

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

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

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

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

  437.     }

  438. }

  439. 

  440. static void mxf_write_preface(AVFormatContext *s)

  441. {

  442.     MXFContext *mxf = s->priv_data;

  443.     ByteIOContext *pb = s->pb;

  444. 

  445.     mxf_write_metadata_key(pb, 0x012f00);

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

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

  448. 

  449.     // write preface set uid

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

  451.     mxf_write_uuid(pb, Preface, 0);

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

  453. 

  454.     // last modified date

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

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

  457. 

  458.     // write version

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

  460.     put_be16(pb, 258); // v1.2

  461. 

  462.     // write identification_refs

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

  464.     mxf_write_refs_count(pb, 1);

  465.     mxf_write_uuid(pb, Identification, 0);

  466. 

  467.     // write content_storage_refs

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

  469.     mxf_write_uuid(pb, ContentStorage, 0);

  470. 

  471.     // operational pattern

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

  473.     put_buffer(pb, op1a_ul, 16);

  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+2);

  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

  641.         component = SourceClip;

  642.     if (type == SourcePackage)

  643.         component += TypeBottom;

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

  645. }

  646. 

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

  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, type == MaterialPackage ? TimecodeComponent :

  658.                    TimecodeComponent + TypeBottom, st->index);

  659. 

  660.     mxf_write_common_fields(s, st);

  661. 

  662.     // Start Time Code

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

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

  665. 

  666.     // Rounded Time Code Base

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

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

  669. 

  670.     // Drop Frame

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

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

  673. }

  674. 

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

  676. {

  677.     ByteIOContext *pb = s->pb;

  678.     int i;

  679. 

  680.     mxf_write_metadata_key(pb, 0x011100);

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

  682.     klv_encode_ber_length(pb, 108);

  683. 

  684.     // write uid

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

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

  687. 

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

  689.     mxf_write_common_fields(s, st);

  690. 

  691.     // write start_position

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

  693.     put_be64(pb, 0);

  694. 

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

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

  697.     if (type == SourcePackage) {

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

  699.             put_be64(pb, 0);

  700.     } else

  701.         mxf_write_umid(s, 1);

  702. 

  703.     // write source track id

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

  705.     if (type == SourcePackage)

  706.         put_be32(pb, 0);

  707.     else

  708.         put_be32(pb, st->index+2);

  709. }

  710. 

  711. static void mxf_write_multi_descriptor(AVFormatContext *s)

  712. {

  713.     MXFContext *mxf = s->priv_data;

  714.     ByteIOContext *pb = s->pb;

  715.     const uint8_t *ul;

  716.     int i;

  717. 

  718.     mxf_write_metadata_key(pb, 0x014400);

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

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

  721. 

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

  723.     mxf_write_uuid(pb, MultipleDescriptor, 0);

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

  725. 

  726.     // write sample rate

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

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

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

  730. 

  731.     // write essence container ul

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

  733.     if (mxf->essence_container_count > 1)

  734.         ul = multiple_desc_ul;

  735.     else {

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

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

  738.     }

  739.     put_buffer(pb, ul, 16);

  740. 

  741.     // write sub descriptor refs

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

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

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

  745.         mxf_write_uuid(pb, SubDescriptor, i);

  746. }

  747. 

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

  749. {

  750.     MXFContext *mxf = s->priv_data;

  751.     MXFStreamContext *sc = st->priv_data;

  752.     ByteIOContext *pb = s->pb;

  753. 

  754.     put_buffer(pb, key, 16);

  755.     klv_encode_ber_length(pb, size+20+8+12+20);

  756. 

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

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

  759. 

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

  761.     put_be32(pb, st->index+2);

  762. 

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

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

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

  766. 

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

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

  769. }

  770. 

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

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

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

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

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

  776. 

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

  778. {

  779.     MXFStreamContext *sc = st->priv_data;

  780.     ByteIOContext *pb = s->pb;

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

  782.     int display_height;

  783.     int f1, f2;

  784. 

  785.     mxf_write_generic_desc(s, st, key, size+8+8+8+8+8+8+5+16+sc->interlaced*4+12+20);

  786. 

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

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

  789. 

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

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

  792. 

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

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

  795. 

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

  797.         display_height = 576;

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

  799.         display_height = 486;

  800.     else

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

  802. 

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

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

  805. 

  806.     // component depth

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

  808.     put_be32(pb, 8);

  809. 

  810.     // horizontal subsampling

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

  812.     put_be32(pb, 2);

  813. 

  814.     // frame layout

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

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

  817. 

  818.     // video line map

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

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

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

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

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

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

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

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

  827.     }

  828. 

  829.     if (!sc->interlaced) {

  830.         f2  = 0;

  831.         f1 *= 2;

  832.     }

  833. 

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

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

  836.     put_be32(pb, 4);

  837.     put_be32(pb, f1);

  838.     if (sc->interlaced)

  839.         put_be32(pb, f2);

  840. 

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

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

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

  844. 

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

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

  847. }

  848. 

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

  850. {

  851.     mxf_write_cdci_common(s, st, mxf_cdci_descriptor_key, 0);

  852. }

  853. 

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

  855. {

  856.     ByteIOContext *pb = s->pb;

  857. 

  858.     mxf_write_cdci_common(s, st, mxf_mpegvideo_descriptor_key, 8);

  859. 

  860.     // bit rate

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

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

  863. }

  864. 

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

  866. {

  867.     ByteIOContext *pb = s->pb;

  868. 

  869.     mxf_write_generic_desc(s, st, key, size+5+12+8+8);

  870. 

  871.     // audio locked

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

  873.     put_byte(pb, 1);

  874. 

  875.     // write audio sampling rate

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

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

  878.     put_be32(pb, 1);

  879. 

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

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

  882. 

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

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

  885. }

  886. 

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

  888. {

  889.     ByteIOContext *pb = s->pb;

  890. 

  891.     mxf_write_generic_sound_common(s, st, key, size+6+8);

  892. 

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

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

  895. 

  896.     // avg bytes per sec

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

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

  899. }

  900. 

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

  902. {

  903.     mxf_write_wav_common(s, st, mxf_wav_descriptor_key, 0);

  904. }

  905. 

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

  907. {

  908.     mxf_write_wav_common(s, st, mxf_aes3_descriptor_key, 0);

  909. }

  910. 

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

  912. {

  913.     mxf_write_generic_sound_common(s, st, mxf_generic_sound_descriptor_key, 0);

  914. }

  915. 

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

  917. {

  918.     MXFContext *mxf = s->priv_data;

  919.     ByteIOContext *pb = s->pb;

  920.     int i, track_count = s->nb_streams+1;

  921. 

  922.     if (type == MaterialPackage) {

  923.         mxf_write_metadata_key(pb, 0x013600);

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

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

  926.     } else {

  927.         mxf_write_metadata_key(pb, 0x013700);

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

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

  930.     }

  931. 

  932.     // write uid

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

  934.     mxf_write_uuid(pb, type, 0);

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

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

  937. 

  938.     // write package umid

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

  940.     mxf_write_umid(s, type == SourcePackage);

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

  942. 

  943.     // package creation date

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

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

  946. 

  947.     // package modified date

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

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

  950. 

  951.     // write track refs

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

  953.     mxf_write_refs_count(pb, track_count);

  954.     mxf_write_uuid(pb, type == MaterialPackage ? Track :

  955.                    Track + TypeBottom, -1); // timecode track

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

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

  958. 

  959.     // write multiple descriptor reference

  960.     if (type == SourcePackage) {

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

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

  963.             mxf_write_uuid(pb, MultipleDescriptor, 0);

  964.             mxf_write_multi_descriptor(s);

  965.         } else

  966.             mxf_write_uuid(pb, SubDescriptor, 0);

  967.     }

  968. 

  969.     // write timecode track

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

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

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

  973. 

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

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

  976.         mxf_write_track(s, st, type);

  977.         mxf_write_sequence(s, st, type);

  978.         mxf_write_structural_component(s, st, type);

  979. 

  980.         if (type == SourcePackage) {

  981.             MXFStreamContext *sc = st->priv_data;

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

  983.         }

  984.     }

  985. }

  986. 

  987. static int mxf_write_essence_container_data(AVFormatContext *s)

  988. {

  989.     ByteIOContext *pb = s->pb;

  990. 

  991.     mxf_write_metadata_key(pb, 0x012300);

  992.     klv_encode_ber_length(pb, 72);

  993. 

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

  995.     mxf_write_uuid(pb, EssenceContainerData, 0);

  996. 

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

  998.     mxf_write_umid(s, 1);

  999. 

  1000.     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID

  1001.     put_be32(pb, 1);

  1002. 

  1003.     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID

  1004.     put_be32(pb, 2);

  1005. 

  1006.     return 0;

  1007. }

  1008. 

  1009. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  1010. {

  1011.     mxf_write_preface(s);

  1012.     mxf_write_identification(s);

  1013.     mxf_write_content_storage(s);

  1014.     mxf_write_package(s, MaterialPackage);

  1015.     mxf_write_package(s, SourcePackage);

  1016.     mxf_write_essence_container_data(s);

  1017.     return 0;

  1018. }

  1019. 

  1020. static unsigned klv_fill_size(uint64_t size)

  1021. {

  1022.     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));

  1023.     if (pad < 20) // smallest fill item possible

  1024.         return pad + KAG_SIZE;

  1025.     else

  1026.         return pad & (KAG_SIZE-1);

  1027. }

  1028. 

  1029. static void mxf_write_index_table_segment(AVFormatContext *s)

  1030. {

  1031.     MXFContext *mxf = s->priv_data;

  1032.     ByteIOContext *pb = s->pb;

  1033.     int i, j;

  1034.     int temporal_reordering = 0;

  1035.     int key_index = mxf->last_key_index;

  1036. 

  1037.     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);

  1038. 

  1039.     if (!mxf->edit_units_count && !mxf->edit_unit_byte_count)

  1040.         return;

  1041. 

  1042.     put_buffer(pb, index_table_segment_key, 16);

  1043. 

  1044.     if (mxf->edit_unit_byte_count) {

  1045.         klv_encode_ber_length(pb, 80);

  1046.     } else {

  1047.         klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1)*6 +

  1048.                               12+mxf->edit_units_count*(11+mxf->slice_count*4));

  1049.     }

  1050. 

  1051.     // instance id

  1052.     mxf_write_local_tag(pb, 16, 0x3C0A);

  1053.     mxf_write_uuid(pb, IndexTableSegment, 0);

  1054. 

  1055.     // index edit rate

  1056.     mxf_write_local_tag(pb, 8, 0x3F0B);

  1057.     put_be32(pb, mxf->time_base.den);

  1058.     put_be32(pb, mxf->time_base.num);

  1059. 

  1060.     // index start position

  1061.     mxf_write_local_tag(pb, 8, 0x3F0C);

  1062.     put_be64(pb, mxf->last_indexed_edit_unit);

  1063. 

  1064.     // index duration

  1065.     mxf_write_local_tag(pb, 8, 0x3F0D);

  1066.     put_be64(pb, mxf->edit_units_count);

  1067. 

  1068.     // edit unit byte count

  1069.     mxf_write_local_tag(pb, 4, 0x3F05);

  1070.     put_be32(pb, mxf->edit_unit_byte_count);

  1071. 

  1072.     // index sid

  1073.     mxf_write_local_tag(pb, 4, 0x3F06);

  1074.     put_be32(pb, 2);

  1075. 

  1076.     // body sid

  1077.     mxf_write_local_tag(pb, 4, 0x3F07);

  1078.     put_be32(pb, 1);

  1079. 

  1080.     if (!mxf->edit_unit_byte_count) {

  1081.         // real slice count - 1

  1082.         mxf_write_local_tag(pb, 1, 0x3F08);

  1083.         put_byte(pb, mxf->slice_count);

  1084. 

  1085.         // delta entry array

  1086.         mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);

  1087.         put_be32(pb, s->nb_streams+1); // num of entries

  1088.         put_be32(pb, 6);               // size of one entry

  1089.         // write system item delta entry

  1090.         put_byte(pb, 0);

  1091.         put_byte(pb, 0); // slice entry

  1092.         put_be32(pb, 0); // element delta

  1093.         for (i = 0; i < s->nb_streams; i++) {

  1094.             AVStream *st = s->streams[i];

  1095.             MXFStreamContext *sc = st->priv_data;

  1096.             put_byte(pb, sc->temporal_reordering);

  1097.             if (sc->temporal_reordering)

  1098.                 temporal_reordering = 1;

  1099.             if (i == 0) { // video track

  1100.                 put_byte(pb, 0); // slice number

  1101.                 put_be32(pb, KAG_SIZE); // system item size including klv fill

  1102.             } else { // audio track

  1103.                 unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;

  1104.                 audio_frame_size += klv_fill_size(audio_frame_size);

  1105.                 put_byte(pb, 1);

  1106.                 put_be32(pb, (i-1)*audio_frame_size); // element delta

  1107.             }

  1108.         }

  1109. 

  1110.         mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);

  1111.         put_be32(pb, mxf->edit_units_count);  // num of entries

  1112.         put_be32(pb, 11+mxf->slice_count*4);  // size of one entry

  1113.         for (i = 0; i < mxf->edit_units_count; i++) {

  1114.             if (temporal_reordering) {

  1115.                 int temporal_offset = 0;

  1116.                 for (j = i+1; j < mxf->edit_units_count; j++) {

  1117.                     temporal_offset++;

  1118.                     if (mxf->index_entries[j].flags & 0x10) { // backward prediction

  1119.                         // next is not b, so is reordered

  1120.                         if (!(mxf->index_entries[i+1].flags & 0x10)) {

  1121.                             if ((mxf->index_entries[i].flags & 0x11) == 0) // i frame

  1122.                                 temporal_offset = 0;

  1123.                             else

  1124.                                 temporal_offset = -temporal_offset;

  1125.                         }

  1126.                         break;

  1127.                     }

  1128.                 }

  1129.                 put_byte(pb, temporal_offset);

  1130.             } else

  1131.                 put_byte(pb, 0);

  1132.             if (!(mxf->index_entries[i].flags & 0x33)) { // I frame

  1133.                 mxf->last_key_index = key_index;

  1134.                 key_index = i;

  1135.             }

  1136.             if (mxf->index_entries[i].flags & 0x10 && // backward prediction

  1137.                 !(mxf->index_entries[key_index].flags & 0x80)) { // open gop

  1138.                 put_byte(pb, mxf->last_key_index - i);

  1139.             } else {

  1140.                 put_byte(pb, key_index - i); // key frame offset

  1141.                 if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward

  1142.                     mxf->last_key_index = key_index;

  1143.             }

  1144.             put_byte(pb, mxf->index_entries[i].flags);

  1145.             // stream offset

  1146.             put_be64(pb, mxf->index_entries[i].offset);

  1147.             if (s->nb_streams > 1)

  1148.                 put_be32(pb, mxf->index_entries[i].slice_offset);

  1149.         }

  1150. 

  1151.         mxf->last_key_index = key_index - mxf->edit_units_count;

  1152.         mxf->last_indexed_edit_unit += mxf->edit_units_count;

  1153.         mxf->edit_units_count = 0;

  1154.     }

  1155. }

  1156. 

  1157. static void mxf_write_klv_fill(AVFormatContext *s)

  1158. {

  1159.     unsigned pad = klv_fill_size(url_ftell(s->pb));

  1160.     if (pad) {

  1161.         put_buffer(s->pb, klv_fill_key, 16);

  1162.         pad -= 16 + 4;

  1163.         klv_encode_ber4_length(s->pb, pad);

  1164.         for (; pad; pad--)

  1165.             put_byte(s->pb, 0);

  1166.         assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));

  1167.     }

  1168. }

  1169. 

  1170. static void mxf_write_partition(AVFormatContext *s, int bodysid,

  1171.                                 int indexsid,

  1172.                                 const uint8_t *key, int write_metadata)

  1173. {

  1174.     MXFContext *mxf = s->priv_data;

  1175.     ByteIOContext *pb = s->pb;

  1176.     int64_t header_byte_count_offset;

  1177.     unsigned index_byte_count = 0;

  1178.     uint64_t partition_offset = url_ftell(pb);

  1179. 

  1180.     if (!mxf->edit_unit_byte_count && mxf->edit_units_count)

  1181.         index_byte_count = 85 + 12+(s->nb_streams+1)*6 +

  1182.             12+mxf->edit_units_count*(11+mxf->slice_count*4);

  1183.     else if (mxf->edit_unit_byte_count && indexsid)

  1184.         index_byte_count = 80;

  1185. 

  1186.     if (index_byte_count) {

  1187.         // add encoded ber length

  1188.         index_byte_count += 16 + klv_ber_length(index_byte_count);

  1189.         index_byte_count += klv_fill_size(index_byte_count);

  1190.     }

  1191. 

  1192.     if (!memcmp(key, body_partition_key, 16)) {

  1193.         mxf->body_partition_offset =

  1194.             av_realloc(mxf->body_partition_offset,

  1195.                        (mxf->body_partitions_count+1)*

  1196.                        sizeof(*mxf->body_partition_offset));

  1197.         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;

  1198.     }

  1199. 

  1200.     // write klv

  1201.     put_buffer(pb, key, 16);

  1202.     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);

  1203. 

  1204.     // write partition value

  1205.     put_be16(pb, 1); // majorVersion

  1206.     put_be16(pb, 2); // minorVersion

  1207.     put_be32(pb, KAG_SIZE); // KAGSize

  1208. 

  1209.     put_be64(pb, partition_offset); // ThisPartition

  1210. 

  1211.     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)

  1212.         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition

  1213.     else if (!memcmp(key, footer_partition_key, 16) && mxf->body_partitions_count)

  1214.         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition

  1215.     else

  1216.         put_be64(pb, 0);

  1217. 

  1218.     put_be64(pb, mxf->footer_partition_offset); // footerPartition

  1219. 

  1220.     // set offset

  1221.     header_byte_count_offset = url_ftell(pb);

  1222.     put_be64(pb, 0); // headerByteCount, update later

  1223. 

  1224.     // indexTable

  1225.     put_be64(pb, index_byte_count); // indexByteCount

  1226.     put_be32(pb, index_byte_count ? indexsid : 0); // indexSID

  1227. 

  1228.     // BodyOffset

  1229.     if (bodysid && mxf->edit_units_count && mxf->body_partitions_count) {

  1230.         put_be64(pb, mxf->body_offset);

  1231.     } else

  1232.         put_be64(pb, 0);

  1233. 

  1234.     put_be32(pb, bodysid); // bodySID

  1235. 

  1236.     // operational pattern

  1237.     put_buffer(pb, op1a_ul, 16);

  1238. 

  1239.     // essence container

  1240.     mxf_write_essence_container_refs(s);

  1241. 

  1242.     if (write_metadata) {

  1243.         // mark the start of the headermetadata and calculate metadata size

  1244.         int64_t pos, start;

  1245.         unsigned header_byte_count;

  1246. 

  1247.         mxf_write_klv_fill(s);

  1248.         start = url_ftell(s->pb);

  1249.         mxf_write_primer_pack(s);

  1250.         mxf_write_header_metadata_sets(s);

  1251.         pos = url_ftell(s->pb);

  1252.         header_byte_count = pos - start + klv_fill_size(pos);

  1253. 

  1254.         // update header_byte_count

  1255.         url_fseek(pb, header_byte_count_offset, SEEK_SET);

  1256.         put_be64(pb, header_byte_count);

  1257.         url_fseek(pb, pos, SEEK_SET);

  1258.     }

  1259. 

  1260.     put_flush_packet(pb);

  1261. }

  1262. 

  1263. static const UID mxf_mpeg2_codec_uls[] = {

  1264.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame

  1265.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP

  1266.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame

  1267.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP

  1268.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame

  1269.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP

  1270.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame

  1271.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP

  1272. };

  1273. 

  1274. static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)

  1275. {

  1276.     if (avctx->profile == 4) { // Main

  1277.         if (avctx->level == 8) // Main

  1278.             return avctx->gop_size ?

  1279.                 &mxf_mpeg2_codec_uls[1] :

  1280.                 &mxf_mpeg2_codec_uls[0];

  1281.         else if (avctx->level == 4) // High

  1282.             return avctx->gop_size ?

  1283.                 &mxf_mpeg2_codec_uls[5] :

  1284.                 &mxf_mpeg2_codec_uls[4];

  1285.     } else if (avctx->profile == 0) { // 422

  1286.         if (avctx->level == 5) // Main

  1287.             return avctx->gop_size ?

  1288.                 &mxf_mpeg2_codec_uls[3] :

  1289.                 &mxf_mpeg2_codec_uls[2];

  1290.         else if (avctx->level == 2) // High

  1291.             return avctx->gop_size ?

  1292.                 &mxf_mpeg2_codec_uls[7] :

  1293.                 &mxf_mpeg2_codec_uls[6];

  1294.     }

  1295.     return NULL;

  1296. }

  1297. 

  1298. static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt, int *flags)

  1299. {

  1300.     MXFStreamContext *sc = st->priv_data;

  1301.     MXFContext *mxf = s->priv_data;

  1302.     uint32_t c = -1;

  1303.     int i;

  1304. 

  1305.     *flags = 0;

  1306. 

  1307.     for(i = 0; i < pkt->size - 4; i++) {

  1308.         c = (c<<8) + pkt->data[i];

  1309.         if (c == 0x1B5) {

  1310.             if ((pkt->data[i+1] & 0xf0) == 0x10) { // seq ext

  1311.                 st->codec->profile = pkt->data[i+1] & 0x07;

  1312.                 st->codec->level   = pkt->data[i+2] >> 4;

  1313.             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext

  1314.                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame

  1315.                 break;

  1316.             }

  1317.         } else if (c == 0x1b8) { // gop

  1318.             if (pkt->data[i+4]>>6 & 0x01) // closed

  1319.                 *flags |= 0x80; // random access

  1320.             if (!mxf->header_written) {

  1321.                 unsigned hours   =  (pkt->data[i+1]>>2) & 0x1f;

  1322.                 unsigned minutes = ((pkt->data[i+1] & 0x03) << 4) | (pkt->data[i+2]>>4);

  1323.                 unsigned seconds = ((pkt->data[i+2] & 0x07) << 3) | (pkt->data[i+3]>>5);

  1324.                 unsigned frames  = ((pkt->data[i+3] & 0x1f) << 1) | (pkt->data[i+4]>>7);

  1325.                 mxf->timecode_drop_frame = !!(pkt->data[i+1] & 0x80);

  1326.                 mxf->timecode_start = (hours*3600 + minutes*60 + seconds) *

  1327.                     mxf->timecode_base + frames;

  1328.                 if (mxf->timecode_drop_frame) {

  1329.                     unsigned tminutes = 60 * hours + minutes;

  1330.                     mxf->timecode_start -= 2 * (tminutes - tminutes / 10);

  1331.                 }

  1332.                 av_log(s, AV_LOG_DEBUG, "frame %d %d:%d:%d%c%d\n", mxf->timecode_start,

  1333.                        hours, minutes, seconds, mxf->timecode_drop_frame ? ';':':', frames);

  1334.             }

  1335.         } else if (c == 0x1b3) { // seq

  1336.             *flags |= 0x40;

  1337.             switch ((pkt->data[i+4]>>4) & 0xf) {

  1338.             case 2:  sc->aspect_ratio = (AVRational){  4,  3}; break;

  1339.             case 3:  sc->aspect_ratio = (AVRational){ 16,  9}; break;

  1340.             case 4:  sc->aspect_ratio = (AVRational){221,100}; break;

  1341.             default:

  1342.                 av_reduce(&sc->aspect_ratio.num, &sc->aspect_ratio.den,

  1343.                           st->codec->width, st->codec->height, 1024*1024);

  1344.             }

  1345.         } else if (c == 0x100) { // pic

  1346.             int pict_type = (pkt->data[i+2]>>3) & 0x07;

  1347.             if (pict_type == 2) { // P frame

  1348.                 *flags |= 0x22;

  1349.                 st->codec->gop_size = 1;

  1350.             } else if (pict_type == 3) { // B frame

  1351.                 *flags |= 0x33;

  1352.                 sc->temporal_reordering = -1;

  1353.             } else if (!pict_type) {

  1354.                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");

  1355.                 return 0;

  1356.             }

  1357.         }

  1358.     }

  1359.     if (s->oformat != &mxf_d10_muxer)

  1360.         sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);

  1361.     return !!sc->codec_ul;

  1362. }

  1363. 

  1364. static uint64_t mxf_parse_timestamp(time_t timestamp)

  1365. {

  1366.     struct tm *time = gmtime(&timestamp);

  1367.     return (uint64_t)(time->tm_year+1900) << 48 |

  1368.            (uint64_t)(time->tm_mon+1)     << 40 |

  1369.            (uint64_t) time->tm_mday       << 32 |

  1370.                       time->tm_hour       << 24 |

  1371.                       time->tm_min        << 16 |

  1372.                       time->tm_sec        << 8;

  1373. }

  1374. 

  1375. static void mxf_gen_umid(AVFormatContext *s)

  1376. {

  1377.     MXFContext *mxf = s->priv_data;

  1378.     uint32_t seed = ff_random_get_seed();

  1379.     uint64_t umid = seed + 0x5294713400000000LL;

  1380. 

  1381.     AV_WB64(mxf->umid  , umid);

  1382.     AV_WB64(mxf->umid+8, umid>>8);

  1383. 

  1384.     mxf->instance_number = seed;

  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.     if (!s->nb_streams)

  1395.         return -1;

  1396. 

  1397.     for (i = 0; i < s->nb_streams; i++) {

  1398.         AVStream *st = s->streams[i];

  1399.         MXFStreamContext *sc = av_mallocz(sizeof(*sc));

  1400.         if (!sc)

  1401.             return AVERROR(ENOMEM);

  1402.         st->priv_data = sc;

  1403. 

  1404.         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {

  1405.             if (i != 0) {

  1406.                 av_log(s, AV_LOG_ERROR, "video stream must be first track\n");

  1407.                 return -1;

  1408.             }

  1409.             if (fabs(av_q2d(st->codec->time_base) - 1/25.0) < 0.0001) {

  1410.                 samples_per_frame = PAL_samples_per_frame;

  1411.                 mxf->time_base = (AVRational){ 1, 25 };

  1412.                 mxf->timecode_base = 25;

  1413.             } else if (fabs(av_q2d(st->codec->time_base) - 1001/30000.0) < 0.0001) {

  1414.                 samples_per_frame = NTSC_samples_per_frame;

  1415.                 mxf->time_base = (AVRational){ 1001, 30000 };

  1416.                 mxf->timecode_base = 30;

  1417.             } else {

  1418.                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");

  1419.                 return -1;

  1420.             }

  1421.             av_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);

  1422.             if (s->oformat == &mxf_d10_muxer) {

  1423.                 if (st->codec->bit_rate == 50000000)

  1424.                     if (mxf->time_base.den == 25) sc->index = 3;

  1425.                     else                          sc->index = 5;

  1426.                 else if (st->codec->bit_rate == 40000000)

  1427.                     if (mxf->time_base.den == 25) sc->index = 7;

  1428.                     else                          sc->index = 9;

  1429.                 else if (st->codec->bit_rate == 30000000)

  1430.                     if (mxf->time_base.den == 25) sc->index = 11;

  1431.                     else                          sc->index = 13;

  1432.                 else {

  1433.                     av_log(s, AV_LOG_ERROR, "error MXF D-10 only support 30/40/50 mbit/s\n");

  1434.                     return -1;

  1435.                 }

  1436. 

  1437.                 mxf->edit_unit_byte_count = KAG_SIZE; // system element

  1438.                 mxf->edit_unit_byte_count += 16 + 4 + (uint64_t)st->codec->bit_rate *

  1439.                     mxf->time_base.num / (8*mxf->time_base.den);

  1440.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1441.                 mxf->edit_unit_byte_count += 16 + 4 + 4 + samples_per_frame[0]*8*4;

  1442.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1443.             }

  1444.         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {

  1445.             if (st->codec->sample_rate != 48000) {

  1446.                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");

  1447.                 return -1;

  1448.             }

  1449.             av_set_pts_info(st, 64, 1, st->codec->sample_rate);

  1450.             if (s->oformat == &mxf_d10_muxer) {

  1451.                 if (st->index != 1) {

  1452.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support one audio track\n");

  1453.                     return -1;

  1454.                 }

  1455.                 if (st->codec->codec_id != CODEC_ID_PCM_S16LE &&

  1456.                     st->codec->codec_id != CODEC_ID_PCM_S24LE) {

  1457.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support 16 or 24 bits le audio\n");

  1458.                 }

  1459.                 sc->index = ((MXFStreamContext*)s->streams[0]->priv_data)->index + 1;

  1460.             } else

  1461.             mxf->slice_count = 1;

  1462.         }

  1463. 

  1464.         if (!sc->index) {

  1465.             sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);

  1466.             if (sc->index == -1) {

  1467.                 av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "

  1468.                        "codec not currently supported in container\n", i);

  1469.                 return -1;

  1470.             }

  1471.         }

  1472. 

  1473.         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;

  1474. 

  1475.         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);

  1476.         sc->track_essence_element_key[15] = present[sc->index];

  1477.         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);

  1478. 

  1479.         if (!present[sc->index])

  1480.             mxf->essence_container_count++;

  1481.         present[sc->index]++;

  1482.     }

  1483. 

  1484.     if (s->oformat == &mxf_d10_muxer) {

  1485.         mxf->essence_container_count = 1;

  1486.     }

  1487. 

  1488.     if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))

  1489.         mxf_gen_umid(s);

  1490. 

  1491.     for (i = 0; i < s->nb_streams; i++) {

  1492.         MXFStreamContext *sc = s->streams[i]->priv_data;

  1493.         // update element count

  1494.         sc->track_essence_element_key[13] = present[sc->index];

  1495.         sc->order = AV_RB32(sc->track_essence_element_key+12);

  1496.     }

  1497. 

  1498.     if (s->timestamp)

  1499.         mxf->timestamp = mxf_parse_timestamp(s->timestamp);

  1500.     mxf->duration = -1;

  1501. 

  1502.     mxf->timecode_track = av_mallocz(sizeof(*mxf->timecode_track));

  1503.     if (!mxf->timecode_track)

  1504.         return AVERROR(ENOMEM);

  1505.     mxf->timecode_track->priv_data = av_mallocz(sizeof(MXFStreamContext));

  1506.     if (!mxf->timecode_track->priv_data)

  1507.         return AVERROR(ENOMEM);

  1508.     mxf->timecode_track->index = -1;

  1509. 

  1510.     if (!samples_per_frame)

  1511.         samples_per_frame = PAL_samples_per_frame;

  1512. 

  1513.     if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)

  1514.         return -1;

  1515. 

  1516.     return 0;

  1517. }

  1518. 

  1519. static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };

  1520. 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 };

  1521. 

  1522. static uint32_t ff_framenum_to_12m_time_code(unsigned frame, int drop, int fps)

  1523. {

  1524.     return (0                                    << 31) | // color frame flag

  1525.            (0                                    << 30) | // drop  frame flag

  1526.            ( ((frame % fps) / 10)                << 28) | // tens  of frames

  1527.            ( ((frame % fps) % 10)                << 24) | // units of frames

  1528.            (0                                    << 23) | // field phase (NTSC), b0 (PAL)

  1529.            ((((frame / fps) % 60) / 10)          << 20) | // tens  of seconds

  1530.            ((((frame / fps) % 60) % 10)          << 16) | // units of seconds

  1531.            (0                                    << 15) | // b0 (NTSC), b2 (PAL)

  1532.            ((((frame / (fps * 60)) % 60) / 10)   << 12) | // tens  of minutes

  1533.            ((((frame / (fps * 60)) % 60) % 10)   <<  8) | // units of minutes

  1534.            (0                                    <<  7) | // b1

  1535.            (0                                    <<  6) | // b2 (NSC), field phase (PAL)

  1536.            ((((frame / (fps * 3600) % 24)) / 10) <<  4) | // tens  of hours

  1537.            (  (frame / (fps * 3600) % 24)) % 10;          // units of hours

  1538. }

  1539. 

  1540. static void mxf_write_system_item(AVFormatContext *s)

  1541. {

  1542.     MXFContext *mxf = s->priv_data;

  1543.     ByteIOContext *pb = s->pb;

  1544.     unsigned frame;

  1545.     uint32_t time_code;

  1546. 

  1547.     frame = mxf->timecode_start + mxf->last_indexed_edit_unit + mxf->edit_units_count;

  1548. 

  1549.     // write system metadata pack

  1550.     put_buffer(pb, system_metadata_pack_key, 16);

  1551.     klv_encode_ber4_length(pb, 57);

  1552.     put_byte(pb, 0x5c); // UL, user date/time stamp, picture and sound item present

  1553.     put_byte(pb, 0x04); // content package rate

  1554.     put_byte(pb, 0x00); // content package type

  1555.     put_be16(pb, 0x00); // channel handle

  1556.     put_be16(pb, frame); // continuity count

  1557.     if (mxf->essence_container_count > 1)

  1558.         put_buffer(pb, multiple_desc_ul, 16);

  1559.     else {

  1560.         MXFStreamContext *sc = s->streams[0]->priv_data;

  1561.         put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);

  1562.     }

  1563.     put_byte(pb, 0);

  1564.     put_be64(pb, 0);

  1565.     put_be64(pb, 0); // creation date/time stamp

  1566. 

  1567.     put_byte(pb, 0x81); // SMPTE 12M time code

  1568.     time_code = ff_framenum_to_12m_time_code(frame, mxf->timecode_drop_frame, mxf->timecode_base);

  1569.     put_be32(pb, time_code);

  1570.     put_be32(pb, 0); // binary group data

  1571.     put_be64(pb, 0);

  1572. 

  1573.     // write system metadata package set

  1574.     put_buffer(pb, system_metadata_package_set_key, 16);

  1575.     klv_encode_ber4_length(pb, 35);

  1576.     put_byte(pb, 0x83); // UMID

  1577.     put_be16(pb, 0x20);

  1578.     mxf_write_umid(s, 1);

  1579. }

  1580. 

  1581. static void mxf_write_d10_video_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1582. {

  1583.     MXFContext *mxf = s->priv_data;

  1584.     ByteIOContext *pb = s->pb;

  1585.     int packet_size = (uint64_t)st->codec->bit_rate*mxf->time_base.num /

  1586.         (8*mxf->time_base.den); // frame size

  1587.     int pad;

  1588. 

  1589.     packet_size += 16 + 4;

  1590.     packet_size += klv_fill_size(packet_size);

  1591. 

  1592.     klv_encode_ber4_length(pb, pkt->size);

  1593.     put_buffer(pb, pkt->data, pkt->size);

  1594. 

  1595.     // ensure CBR muxing by padding to correct video frame size

  1596.     pad = packet_size - pkt->size - 16 - 4;

  1597.     if (pad > 20) {

  1598.         put_buffer(s->pb, klv_fill_key, 16);

  1599.         pad -= 16 + 4;

  1600.         klv_encode_ber4_length(s->pb, pad);

  1601.         for (; pad; pad--)

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

  1603.         assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));

  1604.     } else {

  1605.         av_log(s, AV_LOG_WARNING, "cannot fill d-10 video packet\n");

  1606.         for (; pad > 0; pad--)

  1607.             put_byte(s->pb, 0);

  1608.     }

  1609. }

  1610. 

  1611. static void mxf_write_d10_audio_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1612. {

  1613.     MXFContext *mxf = s->priv_data;

  1614.     ByteIOContext *pb = s->pb;

  1615.     int frame_size = pkt->size / st->codec->block_align;

  1616.     uint8_t *samples = pkt->data;

  1617.     uint8_t *end = pkt->data + pkt->size;

  1618.     int i;

  1619. 

  1620.     klv_encode_ber4_length(pb, 4 + frame_size*4*8);

  1621. 

  1622.     put_byte(pb, (frame_size == 1920 ? 0 : (mxf->edit_units_count-1) % 5 + 1));

  1623.     put_le16(pb, frame_size);

  1624.     put_byte(pb, (1<<st->codec->channels)-1);

  1625. 

  1626.     while (samples < end) {

  1627.         for (i = 0; i < st->codec->channels; i++) {

  1628.             uint32_t sample;

  1629.             if (st->codec->codec_id == CODEC_ID_PCM_S24LE) {

  1630.                 sample = AV_RL24(samples)<< 4;

  1631.                 samples += 3;

  1632.             } else {

  1633.                 sample = AV_RL16(samples)<<12;

  1634.                 samples += 2;

  1635.             }

  1636.             put_le32(pb, sample | i);

  1637.         }

  1638.         for (; i < 8; i++)

  1639.             put_le32(pb, i);

  1640.     }

  1641. }

  1642. 

  1643. static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)

  1644. {

  1645.     MXFContext *mxf = s->priv_data;

  1646.     ByteIOContext *pb = s->pb;

  1647.     AVStream *st = s->streams[pkt->stream_index];

  1648.     MXFStreamContext *sc = st->priv_data;

  1649.     int flags = 0;

  1650. 

  1651.     if (!mxf->edit_unit_byte_count && !(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {

  1652.         mxf->index_entries = av_realloc(mxf->index_entries,

  1653.             (mxf->edit_units_count + EDIT_UNITS_PER_BODY)*sizeof(*mxf->index_entries));

  1654.         if (!mxf->index_entries) {

  1655.             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");

  1656.             return -1;

  1657.         }

  1658.     }

  1659. 

  1660.     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {

  1661.         if (!mxf_parse_mpeg2_frame(s, st, pkt, &flags)) {

  1662.             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");

  1663.             return -1;

  1664.         }

  1665.     }

  1666. 

  1667.     if (!mxf->header_written) {

  1668.         if (mxf->edit_unit_byte_count) {

  1669.             mxf_write_partition(s, 1, 2, header_open_partition_key, 1);

  1670.             mxf_write_klv_fill(s);

  1671.             mxf_write_index_table_segment(s);

  1672.         } else {

  1673.             mxf_write_partition(s, 0, 0, header_open_partition_key, 1);

  1674.         }

  1675.         mxf->header_written = 1;

  1676.     }

  1677. 

  1678.     if (st->index == 0) {

  1679.         if (!mxf->edit_unit_byte_count &&

  1680.             (!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&

  1681.             !(flags & 0x33)) { // I frame, Gop start

  1682.             mxf_write_klv_fill(s);

  1683.             mxf_write_partition(s, 1, 2, body_partition_key, 0);

  1684. 

  1685.             mxf_write_klv_fill(s);

  1686.             mxf_write_index_table_segment(s);

  1687.         }

  1688. 

  1689.         mxf_write_klv_fill(s);

  1690.         mxf_write_system_item(s);

  1691. 

  1692.         if (!mxf->edit_unit_byte_count) {

  1693.             mxf->index_entries[mxf->edit_units_count].offset = mxf->body_offset;

  1694.             mxf->index_entries[mxf->edit_units_count].flags = flags;

  1695.             mxf->body_offset += KAG_SIZE; // size of system element

  1696.         }

  1697.         mxf->edit_units_count++;

  1698.     } else if (!mxf->edit_unit_byte_count && st->index == 1) {

  1699.         mxf->index_entries[mxf->edit_units_count-1].slice_offset =

  1700.             mxf->body_offset - mxf->index_entries[mxf->edit_units_count-1].offset;

  1701.     }

  1702. 

  1703.     mxf_write_klv_fill(s);

  1704.     put_buffer(pb, sc->track_essence_element_key, 16); // write key

  1705.     if (s->oformat == &mxf_d10_muxer) {

  1706.         if (st->codec->codec_type == CODEC_TYPE_VIDEO)

  1707.             mxf_write_d10_video_packet(s, st, pkt);

  1708.         else

  1709.             mxf_write_d10_audio_packet(s, st, pkt);

  1710.     } else {

  1711.         klv_encode_ber4_length(pb, pkt->size); // write length

  1712.         put_buffer(pb, pkt->data, pkt->size);

  1713.         mxf->body_offset += 16+4+pkt->size + klv_fill_size(16+4+pkt->size);

  1714.     }

  1715. 

  1716.     put_flush_packet(pb);

  1717. 

  1718.     return 0;

  1719. }

  1720. 

  1721. static void mxf_write_random_index_pack(AVFormatContext *s)

  1722. {

  1723.     MXFContext *mxf = s->priv_data;

  1724.     ByteIOContext *pb = s->pb;

  1725.     uint64_t pos = url_ftell(pb);

  1726.     int i;

  1727. 

  1728.     put_buffer(pb, random_index_pack_key, 16);

  1729.     klv_encode_ber_length(pb, 28 + 12*mxf->body_partitions_count);

  1730. 

  1731.     if (mxf->edit_unit_byte_count)

  1732.         put_be32(pb, 1); // BodySID of header partition

  1733.     else

  1734.         put_be32(pb, 0);

  1735.     put_be64(pb, 0); // offset of header partition

  1736. 

  1737.     for (i = 0; i < mxf->body_partitions_count; i++) {

  1738.         put_be32(pb, 1); // BodySID

  1739.         put_be64(pb, mxf->body_partition_offset[i]);

  1740.     }

  1741. 

  1742.     put_be32(pb, 0); // BodySID of footer partition

  1743.     put_be64(pb, mxf->footer_partition_offset);

  1744. 

  1745.     put_be32(pb, url_ftell(pb) - pos + 4);

  1746. }

  1747. 

  1748. static int mxf_write_footer(AVFormatContext *s)

  1749. {

  1750.     MXFContext *mxf = s->priv_data;

  1751.     ByteIOContext *pb = s->pb;

  1752. 

  1753.     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  1754. 

  1755.     mxf_write_klv_fill(s);

  1756.     mxf->footer_partition_offset = url_ftell(pb);

  1757.     if (mxf->edit_unit_byte_count) { // no need to repeat index

  1758.         mxf_write_partition(s, 0, 0, footer_partition_key, 0);

  1759.     } else {

  1760.         mxf_write_partition(s, 0, 2, footer_partition_key, 0);

  1761. 

  1762.         mxf_write_klv_fill(s);

  1763.         mxf_write_index_table_segment(s);

  1764.     }

  1765. 

  1766.     mxf_write_klv_fill(s);

  1767.     mxf_write_random_index_pack(s);

  1768. 

  1769.     if (!url_is_streamed(s->pb)) {

  1770.         url_fseek(pb, 0, SEEK_SET);

  1771.         if (mxf->edit_unit_byte_count) {

  1772.             mxf_write_partition(s, 1, 2, header_closed_partition_key, 1);

  1773.             mxf_write_klv_fill(s);

  1774.             mxf_write_index_table_segment(s);

  1775.         } else {

  1776.             mxf_write_partition(s, 0, 0, header_closed_partition_key, 1);

  1777.         }

  1778.     }

  1779. 

  1780.     put_flush_packet(pb);

  1781. 

  1782.     ff_audio_interleave_close(s);

  1783. 

  1784.     av_freep(&mxf->index_entries);

  1785.     av_freep(&mxf->body_partition_offset);

  1786.     av_freep(&mxf->timecode_track->priv_data);

  1787.     av_freep(&mxf->timecode_track);

  1788. 

  1789.     mxf_free(s);

  1790. 

  1791.     return 0;

  1792. }

  1793. 

  1794. static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  1795. {

  1796.     AVPacketList *pktl;

  1797.     int stream_count = 0;

  1798.     int streams[MAX_STREAMS];

  1799. 

  1800.     memset(streams, 0, sizeof(streams));

  1801.     pktl = s->packet_buffer;

  1802.     while (pktl) {

  1803.         //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);

  1804.         if (!streams[pktl->pkt.stream_index])

  1805.             stream_count++;

  1806.         streams[pktl->pkt.stream_index]++;

  1807.         pktl = pktl->next;

  1808.     }

  1809. 

  1810.     if (stream_count && (s->nb_streams == stream_count || flush)) {

  1811.         pktl = s->packet_buffer;

  1812.         if (s->nb_streams != stream_count) {

  1813.             AVPacketList *last = NULL;

  1814.             // find last packet in edit unit

  1815.             while (pktl) {

  1816.                 if (!stream_count || pktl->pkt.stream_index == 0)

  1817.                     break;

  1818.                 last = pktl;

  1819.                 pktl = pktl->next;

  1820.                 stream_count--;

  1821.             }

  1822.             // purge packet queue

  1823.             while (pktl) {

  1824.                 AVPacketList *next = pktl->next;

  1825.                 av_free_packet(&pktl->pkt);

  1826.                 av_freep(&pktl);

  1827.                 pktl = next;

  1828.             }

  1829.             if (last)

  1830.                 last->next = NULL;

  1831.             else {

  1832.                 s->packet_buffer = NULL;

  1833.                 goto out;

  1834.             }

  1835.             pktl = s->packet_buffer;

  1836.         }

  1837. 

  1838.         *out = pktl->pkt;

  1839.         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);

  1840.         s->packet_buffer = pktl->next;

  1841.         av_freep(&pktl);

  1842.         return 1;

  1843.     } else {

  1844.     out:

  1845.         av_init_packet(out);

  1846.         return 0;

  1847.     }

  1848. }

  1849. 

  1850. static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)

  1851. {

  1852.     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;

  1853.     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;

  1854. 

  1855.     return next->dts > pkt->dts ||

  1856.         (next->dts == pkt->dts && sc->order < sc2->order);

  1857. }

  1858. 

  1859. static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  1860. {

  1861.     return ff_audio_rechunk_interleave(s, out, pkt, flush,

  1862.                                mxf_interleave_get_packet, mxf_compare_timestamps);

  1863. }

  1864. 

  1865. AVOutputFormat mxf_muxer = {

  1866.     "mxf",

  1867.     NULL_IF_CONFIG_SMALL("Material eXchange Format"),

  1868.     "application/mxf",

  1869.     "mxf",

  1870.     sizeof(MXFContext),

  1871.     CODEC_ID_PCM_S16LE,

  1872.     CODEC_ID_MPEG2VIDEO,

  1873.     mxf_write_header,

  1874.     mxf_write_packet,

  1875.     mxf_write_footer,

  1876.     AVFMT_NOTIMESTAMPS,

  1877.     NULL,

  1878.     mxf_interleave,

  1879. };

  1880. 

  1881. AVOutputFormat mxf_d10_muxer = {

  1882.     "mxf_d10",

  1883.     NULL_IF_CONFIG_SMALL("Material eXchange Format, D-10 Mapping"),

  1884.     "application/mxf",

  1885.     NULL,

  1886.     sizeof(MXFContext),

  1887.     CODEC_ID_PCM_S16LE,

  1888.     CODEC_ID_MPEG2VIDEO,

  1889.     mxf_write_header,

  1890.     mxf_write_packet,

  1891.     mxf_write_footer,

  1892.     AVFMT_NOTIMESTAMPS,

  1893.     NULL,

  1894.     mxf_interleave,

  1895. };