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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/opt.h"

  39. #include "libavutil/random_seed.h"

  40. #include "libavutil/timecode.h"

  41. #include "libavcodec/bytestream.h"

  42. #include "audiointerleave.h"

  43. #include "avformat.h"

  44. #include "internal.h"

  45. #include "mxf.h"

  46. 

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

  48. static const int NTSC_60_samples_per_frame[] = { 801, 801, 801, 801, 800, 0 };

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

  50. static const int PAL_50_samples_per_frame[]  = { 960, 0 };

  51. 

  52. extern AVOutputFormat ff_mxf_d10_muxer;

  53. 

  54. #define EDIT_UNITS_PER_BODY 250

  55. #define KAG_SIZE 512

  56. 

  57. typedef struct {

  58.     int local_tag;

  59.     UID uid;

  60. } MXFLocalTagPair;

  61. 

  62. typedef struct {

  63.     uint8_t flags;

  64.     uint64_t offset;

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

  66.     uint16_t temporal_ref;

  67. } MXFIndexEntry;

  68. 

  69. typedef struct {

  70.     AudioInterleaveContext aic;

  71.     UID track_essence_element_key;

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

  73.     const UID *codec_ul;

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

  75.     int interlaced;          ///< whether picture is interlaced

  76.     int temporal_reordering;

  77.     AVRational aspect_ratio; ///< display aspect ratio

  78.     int closed_gop;          ///< gop is closed, used in mpeg-2 frame parsing

  79. } MXFStreamContext;

  80. 

  81. typedef struct {

  82.     UID container_ul;

  83.     UID element_ul;

  84.     UID codec_ul;

  85.     void (*write_desc)(AVFormatContext *, AVStream *);

  86. } MXFContainerEssenceEntry;

  87. 

  88. static const struct {

  89.     enum CodecID id;

  90.     int index;

  91. } mxf_essence_mappings[] = {

  92.     { CODEC_ID_MPEG2VIDEO, 0 },

  93.     { CODEC_ID_PCM_S24LE,  1 },

  94.     { CODEC_ID_PCM_S16LE,  1 },

  95.     { CODEC_ID_NONE }

  96. };

  97. 

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

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

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

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

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

  103. 

  104. static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {

  105.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },

  106.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  107.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },

  108.       mxf_write_mpegvideo_desc },

  109.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },

  110.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },

  111.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  112.       mxf_write_aes3_desc },

  113.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },

  114.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },

  115.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  116.       mxf_write_wav_desc },

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

  118.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },

  119.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  121.       mxf_write_cdci_desc },

  122.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },

  123.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  124.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  125.       mxf_write_generic_sound_desc },

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

  127.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },

  128.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  130.       mxf_write_cdci_desc },

  131.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },

  132.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  133.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  134.       mxf_write_generic_sound_desc },

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

  136.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },

  137.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  139.       mxf_write_cdci_desc },

  140.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },

  141.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  142.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  143.       mxf_write_generic_sound_desc },

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

  145.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },

  146.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  148.       mxf_write_cdci_desc },

  149.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },

  150.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  151.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  152.       mxf_write_generic_sound_desc },

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

  154.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },

  155.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

  156.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 },

  157.       mxf_write_cdci_desc },

  158.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },

  159.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  160.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  161.       mxf_write_generic_sound_desc },

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

  163.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },

  164.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

  165.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x06 },

  166.       mxf_write_cdci_desc },

  167.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },

  168.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  169.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  170.       mxf_write_generic_sound_desc },

  171.     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  172.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  173.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  174.       NULL },

  175. };

  176. 

  177. typedef struct MXFContext {

  178.     AVClass *av_class;

  179.     int64_t footer_partition_offset;

  180.     int essence_container_count;

  181.     AVRational time_base;

  182.     int header_written;

  183.     MXFIndexEntry *index_entries;

  184.     unsigned edit_units_count;

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

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

  187.     int last_indexed_edit_unit;

  188.     uint64_t *body_partition_offset;

  189.     unsigned body_partitions_count;

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

  191.     uint64_t duration;

  192.     AVTimecode tc;       ///< timecode context

  193.     AVStream *timecode_track;

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

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

  196.     uint64_t body_offset;

  197.     uint32_t instance_number;

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

  199. } MXFContext;

  200. 

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

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

  203. 

  204. /**

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

  206.  */

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

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

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

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

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

  212. 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

  213. 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

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

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

  216. 

  217. /**

  218.  * partial key for header metadata

  219.  */

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

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

  222. 

  223. /**

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

  225.  */

  226. static const MXFLocalTagPair mxf_local_tag_batch[] = {

  227.     // preface set

  228.     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */

  229.     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */

  230.     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */

  231.     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */

  232.     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */

  233.     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */

  234.     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */

  235.     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */

  236.     // Identification

  237.     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */

  238.     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */

  239.     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */

  240.     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */

  241.     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */

  242.     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */

  243.     // Content Storage

  244.     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */

  245.     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */

  246.     // Essence Container Data

  247.     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */

  248.     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */

  249.     // Package

  250.     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */

  251.     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */

  252.     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */

  253.     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */

  254.     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */

  255.     // Track

  256.     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */

  257.     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */

  258.     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */

  259.     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */

  260.     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */

  261.     // Sequence

  262.     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */

  263.     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */

  264.     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */

  265.     // Source Clip

  266.     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */

  267.     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */

  268.     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */

  269.     // Timecode Component

  270.     { 0x1501, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x05,0x00,0x00}}, /* Start Time Code */

  271.     { 0x1502, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x04,0x01,0x01,0x02,0x06,0x00,0x00}}, /* Rounded Time Code Base */

  272.     { 0x1503, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x04,0x01,0x01,0x05,0x00,0x00,0x00}}, /* Drop Frame */

  273.     // File Descriptor

  274.     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */

  275.     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */

  276.     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */

  277.     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */

  278.     // Generic Picture Essence Descriptor

  279.     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */

  280.     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */

  281.     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */

  282.     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */

  283.     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */

  284.     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */

  285.     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */

  286.     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */

  287.     // CDCI Picture Essence Descriptor

  288.     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */

  289.     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */

  290.     // Generic Sound Essence Descriptor

  291.     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */

  292.     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */

  293.     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */

  294.     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */

  295.     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */

  296.     // Index Table Segment

  297.     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */

  298.     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */

  299.     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */

  300.     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */

  301.     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */

  302.     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */

  303.     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */

  304.     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */

  305.     // MPEG video Descriptor

  306.     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */

  307.     { 0x8007, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0A,0x00,0x00}}, /* ProfileAndLevel */

  308.     // Wave Audio Essence Descriptor

  309.     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */

  310.     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */

  311. };

  312. 

  313. static void mxf_write_uuid(AVIOContext *pb, enum MXFMetadataSetType type, int value)

  314. {

  315.     avio_write(pb, uuid_base, 12);

  316.     avio_wb16(pb, type);

  317.     avio_wb16(pb, value);

  318. }

  319. 

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

  321. {

  322.     MXFContext *mxf = s->priv_data;

  323.     avio_write(s->pb, umid_ul, 13);

  324.     avio_wb24(s->pb, mxf->instance_number);

  325.     avio_write(s->pb, mxf->umid, 15);

  326.     avio_w8(s->pb, type);

  327. }

  328. 

  329. static void mxf_write_refs_count(AVIOContext *pb, int ref_count)

  330. {

  331.     avio_wb32(pb, ref_count);

  332.     avio_wb32(pb, 16);

  333. }

  334. 

  335. static int klv_ber_length(uint64_t len)

  336. {

  337.     if (len < 128)

  338.         return 1;

  339.     else

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

  341. }

  342. 

  343. static int klv_encode_ber_length(AVIOContext *pb, uint64_t len)

  344. {

  345.     // Determine the best BER size

  346.     int size;

  347.     if (len < 128) {

  348.         //short form

  349.         avio_w8(pb, len);

  350.         return 1;

  351.     }

  352. 

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

  354. 

  355.     // long form

  356.     avio_w8(pb, 0x80 + size);

  357.     while(size) {

  358.         size--;

  359.         avio_w8(pb, len >> 8 * size & 0xff);

  360.     }

  361.     return 0;

  362. }

  363. 

  364. static void klv_encode_ber4_length(AVIOContext *pb, int len)

  365. {

  366.     avio_w8(pb, 0x80 + 3);

  367.     avio_wb24(pb, len);

  368. }

  369. 

  370. /*

  371.  * Get essence container ul index

  372.  */

  373. static int mxf_get_essence_container_ul_index(enum CodecID id)

  374. {

  375.     int i;

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

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

  378.             return mxf_essence_mappings[i].index;

  379.     return -1;

  380. }

  381. 

  382. static void mxf_write_primer_pack(AVFormatContext *s)

  383. {

  384.     AVIOContext *pb = s->pb;

  385.     int local_tag_number, i = 0;

  386. 

  387.     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);

  388. 

  389.     avio_write(pb, primer_pack_key, 16);

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

  391. 

  392.     avio_wb32(pb, local_tag_number); // local_tag num

  393.     avio_wb32(pb, 18); // item size, always 18 according to the specs

  394. 

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

  396.         avio_wb16(pb, mxf_local_tag_batch[i].local_tag);

  397.         avio_write(pb, mxf_local_tag_batch[i].uid, 16);

  398.     }

  399. }

  400. 

  401. static void mxf_write_local_tag(AVIOContext *pb, int size, int tag)

  402. {

  403.     avio_wb16(pb, tag);

  404.     avio_wb16(pb, size);

  405. }

  406. 

  407. static void mxf_write_metadata_key(AVIOContext *pb, unsigned int value)

  408. {

  409.     avio_write(pb, header_metadata_key, 13);

  410.     avio_wb24(pb, value);

  411. }

  412. 

  413. static void mxf_free(AVFormatContext *s)

  414. {

  415.     int i;

  416. 

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

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

  419.         av_freep(&st->priv_data);

  420.     }

  421. }

  422. 

  423. static const MXFCodecUL *mxf_get_data_definition_ul(int type)

  424. {

  425.     const MXFCodecUL *uls = ff_mxf_data_definition_uls;

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

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

  428.             break;

  429.         uls++;

  430.     }

  431.     return uls;

  432. }

  433. 

  434. static void mxf_write_essence_container_refs(AVFormatContext *s)

  435. {

  436.     MXFContext *c = s->priv_data;

  437.     AVIOContext *pb = s->pb;

  438.     int i;

  439. 

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

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

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

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

  444.         avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);

  445.     }

  446. }

  447. 

  448. static void mxf_write_preface(AVFormatContext *s)

  449. {

  450.     MXFContext *mxf = s->priv_data;

  451.     AVIOContext *pb = s->pb;

  452. 

  453.     mxf_write_metadata_key(pb, 0x012f00);

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

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

  456. 

  457.     // write preface set uid

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

  459.     mxf_write_uuid(pb, Preface, 0);

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

  461. 

  462.     // last modified date

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

  464.     avio_wb64(pb, mxf->timestamp);

  465. 

  466.     // write version

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

  468.     avio_wb16(pb, 258); // v1.2

  469. 

  470.     // write identification_refs

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

  472.     mxf_write_refs_count(pb, 1);

  473.     mxf_write_uuid(pb, Identification, 0);

  474. 

  475.     // write content_storage_refs

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

  477.     mxf_write_uuid(pb, ContentStorage, 0);

  478. 

  479.     // operational pattern

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

  481.     avio_write(pb, op1a_ul, 16);

  482. 

  483.     // write essence_container_refs

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

  485.     mxf_write_essence_container_refs(s);

  486. 

  487.     // write dm_scheme_refs

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

  489.     avio_wb64(pb, 0);

  490. }

  491. 

  492. /*

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

  494.  */

  495. static void mxf_write_local_tag_utf16(AVIOContext *pb, int tag, const char *value)

  496. {

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

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

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

  500.         avio_wb16(pb, value[i]);

  501. }

  502. 

  503. static void mxf_write_identification(AVFormatContext *s)

  504. {

  505.     MXFContext *mxf = s->priv_data;

  506.     AVIOContext *pb = s->pb;

  507.     const char *company = "FFmpeg";

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

  509.     const char *version;

  510.     int length;

  511. 

  512.     mxf_write_metadata_key(pb, 0x013000);

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

  514. 

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

  516.         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);

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

  518.     klv_encode_ber_length(pb, length);

  519. 

  520.     // write uid

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

  522.     mxf_write_uuid(pb, Identification, 0);

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

  524. 

  525.     // write generation uid

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

  527.     mxf_write_uuid(pb, Identification, 1);

  528. 

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

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

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

  532. 

  533.     // write product uid

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

  535.     mxf_write_uuid(pb, Identification, 2);

  536. 

  537.     // modification date

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

  539.     avio_wb64(pb, mxf->timestamp);

  540. }

  541. 

  542. static void mxf_write_content_storage(AVFormatContext *s)

  543. {

  544.     AVIOContext *pb = s->pb;

  545. 

  546.     mxf_write_metadata_key(pb, 0x011800);

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

  548.     klv_encode_ber_length(pb, 92);

  549. 

  550.     // write uid

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

  552.     mxf_write_uuid(pb, ContentStorage, 0);

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

  554. 

  555.     // write package reference

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

  557.     mxf_write_refs_count(pb, 2);

  558.     mxf_write_uuid(pb, MaterialPackage, 0);

  559.     mxf_write_uuid(pb, SourcePackage, 0);

  560. 

  561.     // write essence container data

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

  563.     mxf_write_refs_count(pb, 1);

  564.     mxf_write_uuid(pb, EssenceContainerData, 0);

  565. }

  566. 

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

  568. {

  569.     MXFContext *mxf = s->priv_data;

  570.     AVIOContext *pb = s->pb;

  571.     MXFStreamContext *sc = st->priv_data;

  572. 

  573.     mxf_write_metadata_key(pb, 0x013b00);

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

  575.     klv_encode_ber_length(pb, 80);

  576. 

  577.     // write track uid

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

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

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

  581. 

  582.     // write track id

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

  584.     avio_wb32(pb, st->index+2);

  585. 

  586.     // write track number

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

  588.     if (type == MaterialPackage)

  589.         avio_wb32(pb, 0); // track number of material package is 0

  590.     else

  591.         avio_write(pb, sc->track_essence_element_key + 12, 4);

  592. 

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

  594.     avio_wb32(pb, mxf->time_base.den);

  595.     avio_wb32(pb, mxf->time_base.num);

  596. 

  597.     // write origin

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

  599.     avio_wb64(pb, 0);

  600. 

  601.     // write sequence refs

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

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

  604. }

  605. 

  606. 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 };

  607. 

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

  609. {

  610.     MXFContext *mxf = s->priv_data;

  611.     AVIOContext *pb = s->pb;

  612. 

  613.     // find data define uls

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

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

  616.         avio_write(pb, smpte_12m_timecode_track_data_ul, 16);

  617.     else {

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

  619.         avio_write(pb, data_def_ul->uid, 16);

  620.     }

  621. 

  622.     // write duration

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

  624.     avio_wb64(pb, mxf->duration);

  625. }

  626. 

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

  628. {

  629.     MXFContext *mxf = s->priv_data;

  630.     AVIOContext *pb = s->pb;

  631.     enum MXFMetadataSetType component;

  632. 

  633.     mxf_write_metadata_key(pb, 0x010f00);

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

  635.     klv_encode_ber_length(pb, 80);

  636. 

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

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

  639. 

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

  641.     mxf_write_common_fields(s, st);

  642. 

  643.     // write structural component

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

  645.     mxf_write_refs_count(pb, 1);

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

  647.         component = TimecodeComponent;

  648.     else

  649.         component = SourceClip;

  650.     if (type == SourcePackage)

  651.         component += TypeBottom;

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

  653. }

  654. 

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

  656. {

  657.     MXFContext *mxf = s->priv_data;

  658.     AVIOContext *pb = s->pb;

  659. 

  660.     mxf_write_metadata_key(pb, 0x011400);

  661.     klv_encode_ber_length(pb, 75);

  662. 

  663.     // UID

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

  665.     mxf_write_uuid(pb, type == MaterialPackage ? TimecodeComponent :

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

  667. 

  668.     mxf_write_common_fields(s, st);

  669. 

  670.     // Start Time Code

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

  672.     avio_wb64(pb, mxf->tc.start);

  673. 

  674.     // Rounded Time Code Base

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

  676.     avio_wb16(pb, mxf->timecode_base);

  677. 

  678.     // Drop Frame

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

  680.     avio_w8(pb, !!(mxf->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));

  681. }

  682. 

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

  684. {

  685.     AVIOContext *pb = s->pb;

  686.     int i;

  687. 

  688.     mxf_write_metadata_key(pb, 0x011100);

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

  690.     klv_encode_ber_length(pb, 108);

  691. 

  692.     // write uid

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

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

  695. 

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

  697.     mxf_write_common_fields(s, st);

  698. 

  699.     // write start_position

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

  701.     avio_wb64(pb, 0);

  702. 

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

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

  705.     if (type == SourcePackage) {

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

  707.             avio_wb64(pb, 0);

  708.     } else

  709.         mxf_write_umid(s, 1);

  710. 

  711.     // write source track id

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

  713.     if (type == SourcePackage)

  714.         avio_wb32(pb, 0);

  715.     else

  716.         avio_wb32(pb, st->index+2);

  717. }

  718. 

  719. static void mxf_write_multi_descriptor(AVFormatContext *s)

  720. {

  721.     MXFContext *mxf = s->priv_data;

  722.     AVIOContext *pb = s->pb;

  723.     const uint8_t *ul;

  724.     int i;

  725. 

  726.     mxf_write_metadata_key(pb, 0x014400);

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

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

  729. 

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

  731.     mxf_write_uuid(pb, MultipleDescriptor, 0);

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

  733. 

  734.     // write sample rate

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

  736.     avio_wb32(pb, mxf->time_base.den);

  737.     avio_wb32(pb, mxf->time_base.num);

  738. 

  739.     // write essence container ul

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

  741.     if (mxf->essence_container_count > 1)

  742.         ul = multiple_desc_ul;

  743.     else {

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

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

  746.     }

  747.     avio_write(pb, ul, 16);

  748. 

  749.     // write sub descriptor refs

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

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

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

  753.         mxf_write_uuid(pb, SubDescriptor, i);

  754. }

  755. 

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

  757. {

  758.     MXFContext *mxf = s->priv_data;

  759.     MXFStreamContext *sc = st->priv_data;

  760.     AVIOContext *pb = s->pb;

  761. 

  762.     avio_write(pb, key, 16);

  763.     klv_encode_ber4_length(pb, size+20+8+12+20);

  764. 

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

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

  767. 

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

  769.     avio_wb32(pb, st->index+2);

  770. 

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

  772.     avio_wb32(pb, mxf->time_base.den);

  773.     avio_wb32(pb, mxf->time_base.num);

  774. 

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

  776.     avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);

  777. }

  778. 

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

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

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

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

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

  784. 

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

  786. {

  787.     MXFStreamContext *sc = st->priv_data;

  788.     AVIOContext *pb = s->pb;

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

  790.     int display_height;

  791.     int f1, f2;

  792. 

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

  794. 

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

  796.     avio_wb32(pb, st->codec->width);

  797. 

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

  799.     avio_wb32(pb, stored_height>>sc->interlaced);

  800. 

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

  802.     avio_wb32(pb, st->codec->width);

  803. 

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

  805.         display_height = 576;

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

  807.         display_height = 486;

  808.     else

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

  810. 

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

  812.     avio_wb32(pb, display_height>>sc->interlaced);

  813. 

  814.     // component depth

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

  816.     avio_wb32(pb, 8);

  817. 

  818.     // horizontal subsampling

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

  820.     avio_wb32(pb, 2);

  821. 

  822.     // frame layout

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

  824.     avio_w8(pb, sc->interlaced);

  825. 

  826.     // video line map

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

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

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

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

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

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

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

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

  835.     }

  836. 

  837.     if (!sc->interlaced) {

  838.         f2  = 0;

  839.         f1 *= 2;

  840.     }

  841. 

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

  843.     avio_wb32(pb, sc->interlaced ? 2 : 1);

  844.     avio_wb32(pb, 4);

  845.     avio_wb32(pb, f1);

  846.     if (sc->interlaced)

  847.         avio_wb32(pb, f2);

  848. 

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

  850.     avio_wb32(pb, sc->aspect_ratio.num);

  851.     avio_wb32(pb, sc->aspect_ratio.den);

  852. 

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

  854.     avio_write(pb, *sc->codec_ul, 16);

  855. }

  856. 

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

  858. {

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

  860. }

  861. 

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

  863. {

  864.     AVIOContext *pb = s->pb;

  865.     int profile_and_level = (st->codec->profile<<4) | st->codec->level;

  866. 

  867.     mxf_write_cdci_common(s, st, mxf_mpegvideo_descriptor_key, 8+5);

  868. 

  869.     // bit rate

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

  871.     avio_wb32(pb, st->codec->bit_rate);

  872. 

  873.     // profile and level

  874.     mxf_write_local_tag(pb, 1, 0x8007);

  875.     if (!st->codec->profile)

  876.         profile_and_level |= 0x80; // escape bit

  877.     avio_w8(pb, profile_and_level);

  878. }

  879. 

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

  881. {

  882.     AVIOContext *pb = s->pb;

  883. 

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

  885. 

  886.     // audio locked

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

  888.     avio_w8(pb, 1);

  889. 

  890.     // write audio sampling rate

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

  892.     avio_wb32(pb, st->codec->sample_rate);

  893.     avio_wb32(pb, 1);

  894. 

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

  896.     avio_wb32(pb, st->codec->channels);

  897. 

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

  899.     avio_wb32(pb, av_get_bits_per_sample(st->codec->codec_id));

  900. }

  901. 

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

  903. {

  904.     AVIOContext *pb = s->pb;

  905. 

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

  907. 

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

  909.     avio_wb16(pb, st->codec->block_align);

  910. 

  911.     // avg bytes per sec

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

  913.     avio_wb32(pb, st->codec->block_align*st->codec->sample_rate);

  914. }

  915. 

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

  917. {

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

  919. }

  920. 

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

  922. {

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

  924. }

  925. 

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

  927. {

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

  929. }

  930. 

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

  932. {

  933.     MXFContext *mxf = s->priv_data;

  934.     AVIOContext *pb = s->pb;

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

  936. 

  937.     if (type == MaterialPackage) {

  938.         mxf_write_metadata_key(pb, 0x013600);

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

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

  941.     } else {

  942.         mxf_write_metadata_key(pb, 0x013700);

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

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

  945.     }

  946. 

  947.     // write uid

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

  949.     mxf_write_uuid(pb, type, 0);

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

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

  952. 

  953.     // write package umid

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

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

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

  957. 

  958.     // package creation date

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

  960.     avio_wb64(pb, mxf->timestamp);

  961. 

  962.     // package modified date

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

  964.     avio_wb64(pb, mxf->timestamp);

  965. 

  966.     // write track refs

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

  968.     mxf_write_refs_count(pb, track_count);

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

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

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

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

  973. 

  974.     // write multiple descriptor reference

  975.     if (type == SourcePackage) {

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

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

  978.             mxf_write_uuid(pb, MultipleDescriptor, 0);

  979.             mxf_write_multi_descriptor(s);

  980.         } else

  981.             mxf_write_uuid(pb, SubDescriptor, 0);

  982.     }

  983. 

  984.     // write timecode track

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

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

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

  988. 

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

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

  991.         mxf_write_track(s, st, type);

  992.         mxf_write_sequence(s, st, type);

  993.         mxf_write_structural_component(s, st, type);

  994. 

  995.         if (type == SourcePackage) {

  996.             MXFStreamContext *sc = st->priv_data;

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

  998.         }

  999.     }

  1000. }

  1001. 

  1002. static int mxf_write_essence_container_data(AVFormatContext *s)

  1003. {

  1004.     AVIOContext *pb = s->pb;

  1005. 

  1006.     mxf_write_metadata_key(pb, 0x012300);

  1007.     klv_encode_ber_length(pb, 72);

  1008. 

  1009.     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID

  1010.     mxf_write_uuid(pb, EssenceContainerData, 0);

  1011. 

  1012.     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID

  1013.     mxf_write_umid(s, 1);

  1014. 

  1015.     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID

  1016.     avio_wb32(pb, 1);

  1017. 

  1018.     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID

  1019.     avio_wb32(pb, 2);

  1020. 

  1021.     return 0;

  1022. }

  1023. 

  1024. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  1025. {

  1026.     mxf_write_preface(s);

  1027.     mxf_write_identification(s);

  1028.     mxf_write_content_storage(s);

  1029.     mxf_write_package(s, MaterialPackage);

  1030.     mxf_write_package(s, SourcePackage);

  1031.     mxf_write_essence_container_data(s);

  1032.     return 0;

  1033. }

  1034. 

  1035. static unsigned klv_fill_size(uint64_t size)

  1036. {

  1037.     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));

  1038.     if (pad < 20) // smallest fill item possible

  1039.         return pad + KAG_SIZE;

  1040.     else

  1041.         return pad & (KAG_SIZE-1);

  1042. }

  1043. 

  1044. static void mxf_write_index_table_segment(AVFormatContext *s)

  1045. {

  1046.     MXFContext *mxf = s->priv_data;

  1047.     AVIOContext *pb = s->pb;

  1048.     int i, j, temporal_reordering = 0;

  1049.     int key_index = mxf->last_key_index;

  1050. 

  1051.     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);

  1052. 

  1053.     if (!mxf->edit_units_count && !mxf->edit_unit_byte_count)

  1054.         return;

  1055. 

  1056.     avio_write(pb, index_table_segment_key, 16);

  1057. 

  1058.     if (mxf->edit_unit_byte_count) {

  1059.         klv_encode_ber_length(pb, 80);

  1060.     } else {

  1061.         klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1)*6 +

  1062.                               12+mxf->edit_units_count*(11+mxf->slice_count*4));

  1063.     }

  1064. 

  1065.     // instance id

  1066.     mxf_write_local_tag(pb, 16, 0x3C0A);

  1067.     mxf_write_uuid(pb, IndexTableSegment, 0);

  1068. 

  1069.     // index edit rate

  1070.     mxf_write_local_tag(pb, 8, 0x3F0B);

  1071.     avio_wb32(pb, mxf->time_base.den);

  1072.     avio_wb32(pb, mxf->time_base.num);

  1073. 

  1074.     // index start position

  1075.     mxf_write_local_tag(pb, 8, 0x3F0C);

  1076.     avio_wb64(pb, mxf->last_indexed_edit_unit);

  1077. 

  1078.     // index duration

  1079.     mxf_write_local_tag(pb, 8, 0x3F0D);

  1080.     if (mxf->edit_unit_byte_count)

  1081.         avio_wb64(pb, 0); // index table covers whole container

  1082.     else

  1083.         avio_wb64(pb, mxf->edit_units_count);

  1084. 

  1085.     // edit unit byte count

  1086.     mxf_write_local_tag(pb, 4, 0x3F05);

  1087.     avio_wb32(pb, mxf->edit_unit_byte_count);

  1088. 

  1089.     // index sid

  1090.     mxf_write_local_tag(pb, 4, 0x3F06);

  1091.     avio_wb32(pb, 2);

  1092. 

  1093.     // body sid

  1094.     mxf_write_local_tag(pb, 4, 0x3F07);

  1095.     avio_wb32(pb, 1);

  1096. 

  1097.     if (!mxf->edit_unit_byte_count) {

  1098.         // real slice count - 1

  1099.         mxf_write_local_tag(pb, 1, 0x3F08);

  1100.         avio_w8(pb, mxf->slice_count);

  1101. 

  1102.         // delta entry array

  1103.         mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);

  1104.         avio_wb32(pb, s->nb_streams+1); // num of entries

  1105.         avio_wb32(pb, 6);               // size of one entry

  1106.         // write system item delta entry

  1107.         avio_w8(pb, 0);

  1108.         avio_w8(pb, 0); // slice entry

  1109.         avio_wb32(pb, 0); // element delta

  1110.         for (i = 0; i < s->nb_streams; i++) {

  1111.             AVStream *st = s->streams[i];

  1112.             MXFStreamContext *sc = st->priv_data;

  1113.             avio_w8(pb, sc->temporal_reordering);

  1114.             if (sc->temporal_reordering)

  1115.                 temporal_reordering = 1;

  1116.             if (i == 0) { // video track

  1117.                 avio_w8(pb, 0); // slice number

  1118.                 avio_wb32(pb, KAG_SIZE); // system item size including klv fill

  1119.             } else { // audio track

  1120.                 unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;

  1121.                 audio_frame_size += klv_fill_size(audio_frame_size);

  1122.                 avio_w8(pb, 1);

  1123.                 avio_wb32(pb, (i-1)*audio_frame_size); // element delta

  1124.             }

  1125.         }

  1126. 

  1127.         mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);

  1128.         avio_wb32(pb, mxf->edit_units_count);  // num of entries

  1129.         avio_wb32(pb, 11+mxf->slice_count*4);  // size of one entry

  1130. 

  1131.         for (i = 0; i < mxf->edit_units_count; i++) {

  1132.             int temporal_offset = 0;

  1133. 

  1134.             if (!(mxf->index_entries[i].flags & 0x33)) { // I frame

  1135.                 mxf->last_key_index = key_index;

  1136.                 key_index = i;

  1137.             }

  1138. 

  1139.             if (temporal_reordering) {

  1140.                 int pic_num_in_gop = i - key_index;

  1141.                 if (pic_num_in_gop != mxf->index_entries[i].temporal_ref) {

  1142.                     for (j = key_index; j < mxf->edit_units_count; j++) {

  1143.                         if (pic_num_in_gop == mxf->index_entries[j].temporal_ref)

  1144.                             break;

  1145.                     }

  1146.                     if (j == mxf->edit_units_count)

  1147.                         av_log(s, AV_LOG_WARNING, "missing frames\n");

  1148.                     temporal_offset = j - key_index - pic_num_in_gop;

  1149.                 }

  1150.             }

  1151.             avio_w8(pb, temporal_offset);

  1152. 

  1153.             if ((mxf->index_entries[i].flags & 0x30) == 0x30) { // back and forward prediction

  1154.                 avio_w8(pb, mxf->last_key_index - i);

  1155.             } else {

  1156.                 avio_w8(pb, key_index - i); // key frame offset

  1157.                 if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward

  1158.                     mxf->last_key_index = key_index;

  1159.             }

  1160. 

  1161.             if (!(mxf->index_entries[i].flags & 0x33) && // I frame

  1162.                 mxf->index_entries[i].flags & 0x40 && !temporal_offset)

  1163.                 mxf->index_entries[i].flags |= 0x80; // random access

  1164.             avio_w8(pb, mxf->index_entries[i].flags);

  1165.             // stream offset

  1166.             avio_wb64(pb, mxf->index_entries[i].offset);

  1167.             if (s->nb_streams > 1)

  1168.                 avio_wb32(pb, mxf->index_entries[i].slice_offset);

  1169.         }

  1170. 

  1171.         mxf->last_key_index = key_index - mxf->edit_units_count;

  1172.         mxf->last_indexed_edit_unit += mxf->edit_units_count;

  1173.         mxf->edit_units_count = 0;

  1174.     }

  1175. }

  1176. 

  1177. static void mxf_write_klv_fill(AVFormatContext *s)

  1178. {

  1179.     unsigned pad = klv_fill_size(avio_tell(s->pb));

  1180.     if (pad) {

  1181.         avio_write(s->pb, klv_fill_key, 16);

  1182.         pad -= 16 + 4;

  1183.         klv_encode_ber4_length(s->pb, pad);

  1184.         for (; pad; pad--)

  1185.             avio_w8(s->pb, 0);

  1186.         assert(!(avio_tell(s->pb) & (KAG_SIZE-1)));

  1187.     }

  1188. }

  1189. 

  1190. static void mxf_write_partition(AVFormatContext *s, int bodysid,

  1191.                                 int indexsid,

  1192.                                 const uint8_t *key, int write_metadata)

  1193. {

  1194.     MXFContext *mxf = s->priv_data;

  1195.     AVIOContext *pb = s->pb;

  1196.     int64_t header_byte_count_offset;

  1197.     unsigned index_byte_count = 0;

  1198.     uint64_t partition_offset = avio_tell(pb);

  1199. 

  1200.     if (!mxf->edit_unit_byte_count && mxf->edit_units_count)

  1201.         index_byte_count = 85 + 12+(s->nb_streams+1)*6 +

  1202.             12+mxf->edit_units_count*(11+mxf->slice_count*4);

  1203.     else if (mxf->edit_unit_byte_count && indexsid)

  1204.         index_byte_count = 80;

  1205. 

  1206.     if (index_byte_count) {

  1207.         // add encoded ber length

  1208.         index_byte_count += 16 + klv_ber_length(index_byte_count);

  1209.         index_byte_count += klv_fill_size(index_byte_count);

  1210.     }

  1211. 

  1212.     if (!memcmp(key, body_partition_key, 16)) {

  1213.         mxf->body_partition_offset =

  1214.             av_realloc(mxf->body_partition_offset,

  1215.                        (mxf->body_partitions_count+1)*

  1216.                        sizeof(*mxf->body_partition_offset));

  1217.         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;

  1218.     }

  1219. 

  1220.     // write klv

  1221.     avio_write(pb, key, 16);

  1222.     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);

  1223. 

  1224.     // write partition value

  1225.     avio_wb16(pb, 1); // majorVersion

  1226.     avio_wb16(pb, 2); // minorVersion

  1227.     avio_wb32(pb, KAG_SIZE); // KAGSize

  1228. 

  1229.     avio_wb64(pb, partition_offset); // ThisPartition

  1230. 

  1231.     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)

  1232.         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition

  1233.     else if (!memcmp(key, footer_partition_key, 16) && mxf->body_partitions_count)

  1234.         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition

  1235.     else

  1236.         avio_wb64(pb, 0);

  1237. 

  1238.     avio_wb64(pb, mxf->footer_partition_offset); // footerPartition

  1239. 

  1240.     // set offset

  1241.     header_byte_count_offset = avio_tell(pb);

  1242.     avio_wb64(pb, 0); // headerByteCount, update later

  1243. 

  1244.     // indexTable

  1245.     avio_wb64(pb, index_byte_count); // indexByteCount

  1246.     avio_wb32(pb, index_byte_count ? indexsid : 0); // indexSID

  1247. 

  1248.     // BodyOffset

  1249.     if (bodysid && mxf->edit_units_count && mxf->body_partitions_count) {

  1250.         avio_wb64(pb, mxf->body_offset);

  1251.     } else

  1252.         avio_wb64(pb, 0);

  1253. 

  1254.     avio_wb32(pb, bodysid); // bodySID

  1255. 

  1256.     // operational pattern

  1257.     avio_write(pb, op1a_ul, 16);

  1258. 

  1259.     // essence container

  1260.     mxf_write_essence_container_refs(s);

  1261. 

  1262.     if (write_metadata) {

  1263.         // mark the start of the headermetadata and calculate metadata size

  1264.         int64_t pos, start;

  1265.         unsigned header_byte_count;

  1266. 

  1267.         mxf_write_klv_fill(s);

  1268.         start = avio_tell(s->pb);

  1269.         mxf_write_primer_pack(s);

  1270.         mxf_write_header_metadata_sets(s);

  1271.         pos = avio_tell(s->pb);

  1272.         header_byte_count = pos - start + klv_fill_size(pos);

  1273. 

  1274.         // update header_byte_count

  1275.         avio_seek(pb, header_byte_count_offset, SEEK_SET);

  1276.         avio_wb64(pb, header_byte_count);

  1277.         avio_seek(pb, pos, SEEK_SET);

  1278.     }

  1279. 

  1280.     avio_flush(pb);

  1281. }

  1282. 

  1283. static const UID mxf_mpeg2_codec_uls[] = {

  1284.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame

  1285.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP

  1286.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame

  1287.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP

  1288.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame

  1289.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP

  1290.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame

  1291.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP

  1292.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x05,0x02,0x00 }, // MP@H-14 I-Frame

  1293.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x05,0x03,0x00 }, // MP@H-14 Long GOP

  1294. };

  1295. 

  1296. static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)

  1297. {

  1298.     int long_gop = avctx->gop_size > 1 || avctx->has_b_frames;

  1299. 

  1300.     if (avctx->profile == 4) { // Main

  1301.         if (avctx->level == 8) // Main

  1302.             return &mxf_mpeg2_codec_uls[0+long_gop];

  1303.         else if (avctx->level == 4) // High

  1304.             return &mxf_mpeg2_codec_uls[4+long_gop];

  1305.         else if (avctx->level == 6) // High 14

  1306.             return &mxf_mpeg2_codec_uls[8+long_gop];

  1307.     } else if (avctx->profile == 0) { // 422

  1308.         if (avctx->level == 5) // Main

  1309.             return &mxf_mpeg2_codec_uls[2+long_gop];

  1310.         else if (avctx->level == 2) // High

  1311.             return &mxf_mpeg2_codec_uls[6+long_gop];

  1312.     }

  1313.     return NULL;

  1314. }

  1315. 

  1316. static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st,

  1317.                                  AVPacket *pkt, MXFIndexEntry *e)

  1318. {

  1319.     MXFStreamContext *sc = st->priv_data;

  1320.     uint32_t c = -1;

  1321.     int i;

  1322. 

  1323.     for(i = 0; i < pkt->size - 4; i++) {

  1324.         c = (c<<8) + pkt->data[i];

  1325.         if (c == 0x1b5) {

  1326.             if ((pkt->data[i+1] & 0xf0) == 0x10) { // seq ext

  1327.                 st->codec->profile = pkt->data[i+1] & 0x07;

  1328.                 st->codec->level   = pkt->data[i+2] >> 4;

  1329.             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext

  1330.                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame

  1331.                 break;

  1332.             }

  1333.         } else if (c == 0x1b8) { // gop

  1334.             if (pkt->data[i+4]>>6 & 0x01) { // closed

  1335.                 sc->closed_gop = 1;

  1336.                 if (e->flags & 0x40) // sequence header present

  1337.                     e->flags |= 0x80; // random access

  1338.             }

  1339.         } else if (c == 0x1b3) { // seq

  1340.             e->flags |= 0x40;

  1341.             switch ((pkt->data[i+4]>>4) & 0xf) {

  1342.             case 2:  sc->aspect_ratio = (AVRational){  4,  3}; break;

  1343.             case 3:  sc->aspect_ratio = (AVRational){ 16,  9}; break;

  1344.             case 4:  sc->aspect_ratio = (AVRational){221,100}; break;

  1345.             default:

  1346.                 av_reduce(&sc->aspect_ratio.num, &sc->aspect_ratio.den,

  1347.                           st->codec->width, st->codec->height, 1024*1024);

  1348.             }

  1349.         } else if (c == 0x100) { // pic

  1350.             int pict_type = (pkt->data[i+2]>>3) & 0x07;

  1351.             e->temporal_ref = (pkt->data[i+1]<<2) | (pkt->data[i+2]>>6);

  1352.             if (pict_type == 2) { // P frame

  1353.                 e->flags |= 0x22;

  1354.                 sc->closed_gop = 0; // reset closed gop, don't matter anymore

  1355.             } else if (pict_type == 3) { // B frame

  1356.                 if (sc->closed_gop)

  1357.                     e->flags |= 0x13; // only backward prediction

  1358.                 else

  1359.                     e->flags |= 0x33;

  1360.                 sc->temporal_reordering = -1;

  1361.             } else if (!pict_type) {

  1362.                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");

  1363.                 return 0;

  1364.             }

  1365.         }

  1366.     }

  1367.     if (s->oformat != &ff_mxf_d10_muxer)

  1368.         sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);

  1369.     return !!sc->codec_ul;

  1370. }

  1371. 

  1372. static uint64_t mxf_parse_timestamp(time_t timestamp)

  1373. {

  1374.     struct tm *time = gmtime(&timestamp);

  1375.     if (!time)

  1376.         return 0;

  1377.     return (uint64_t)(time->tm_year+1900) << 48 |

  1378.            (uint64_t)(time->tm_mon+1)     << 40 |

  1379.            (uint64_t) time->tm_mday       << 32 |

  1380.                       time->tm_hour       << 24 |

  1381.                       time->tm_min        << 16 |

  1382.                       time->tm_sec        << 8;

  1383. }

  1384. 

  1385. static void mxf_gen_umid(AVFormatContext *s)

  1386. {

  1387.     MXFContext *mxf = s->priv_data;

  1388.     uint32_t seed = av_get_random_seed();

  1389.     uint64_t umid = seed + 0x5294713400000000LL;

  1390. 

  1391.     AV_WB64(mxf->umid  , umid);

  1392.     AV_WB64(mxf->umid+8, umid>>8);

  1393. 

  1394.     mxf->instance_number = seed;

  1395. }

  1396. 

  1397. static int mxf_write_header(AVFormatContext *s)

  1398. {

  1399.     MXFContext *mxf = s->priv_data;

  1400.     int i, ret;

  1401.     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};

  1402.     const int *samples_per_frame = NULL;

  1403.     AVDictionaryEntry *t;

  1404.     int64_t timestamp = 0;

  1405.     AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0);

  1406. 

  1407.     if (!s->nb_streams)

  1408.         return -1;

  1409. 

  1410.     for (i = 0; i < s->nb_streams; i++) {

  1411.         AVStream *st = s->streams[i];

  1412.         MXFStreamContext *sc = av_mallocz(sizeof(*sc));

  1413.         if (!sc)

  1414.             return AVERROR(ENOMEM);

  1415.         st->priv_data = sc;

  1416. 

  1417.         if ((i == 0) ^ (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)) {

  1418.             av_log(s, AV_LOG_ERROR, "there must be exactly one video stream and it must be the first one\n");

  1419.             return -1;

  1420.         }

  1421. 

  1422.         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  1423.             AVRational rate;

  1424.             if (fabs(av_q2d(st->codec->time_base) - 1/25.0) < 0.0001) {

  1425.                 samples_per_frame = PAL_samples_per_frame;

  1426.                 mxf->time_base = (AVRational){ 1, 25 };

  1427.                 mxf->timecode_base = 25;

  1428.             } else if (fabs(av_q2d(st->codec->time_base) - 1/50.0) < 0.0001) {

  1429.                 samples_per_frame = PAL_50_samples_per_frame;

  1430.                 mxf->time_base = (AVRational){ 1, 50 };

  1431.                 mxf->timecode_base = 50;

  1432.             } else if (fabs(av_q2d(st->codec->time_base) - 1001/30000.0) < 0.0001) {

  1433.                 samples_per_frame = NTSC_samples_per_frame;

  1434.                 mxf->time_base = (AVRational){ 1001, 30000 };

  1435.                 mxf->timecode_base = 30;

  1436.             } else if (fabs(av_q2d(st->codec->time_base) - 1001/60000.0) < 0.0001) {

  1437.                 samples_per_frame = NTSC_60_samples_per_frame;

  1438.                 mxf->time_base = (AVRational){ 1001, 60000 };

  1439.                 mxf->timecode_base = 60;

  1440.             } else {

  1441.                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");

  1442.                 return -1;

  1443.             }

  1444.             rate = (AVRational){mxf->time_base.den, mxf->time_base.num};

  1445.             avpriv_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);

  1446.             if (!tcr)

  1447.                 tcr = av_dict_get(st->metadata, "timecode", NULL, 0);

  1448.             if (tcr)

  1449.                 ret = av_timecode_init_from_string(&mxf->tc, rate, tcr->value, s);

  1450.             else

  1451.                 ret = av_timecode_init(&mxf->tc, rate, 0, 0, s);

  1452.             if (ret < 0)

  1453.                 return ret;

  1454.             if (s->oformat == &ff_mxf_d10_muxer) {

  1455.                 if (st->codec->bit_rate == 50000000)

  1456.                     if (mxf->time_base.den == 25) sc->index = 3;

  1457.                     else                          sc->index = 5;

  1458.                 else if (st->codec->bit_rate == 40000000)

  1459.                     if (mxf->time_base.den == 25) sc->index = 7;

  1460.                     else                          sc->index = 9;

  1461.                 else if (st->codec->bit_rate == 30000000)

  1462.                     if (mxf->time_base.den == 25) sc->index = 11;

  1463.                     else                          sc->index = 13;

  1464.                 else {

  1465.                     av_log(s, AV_LOG_ERROR, "error MXF D-10 only support 30/40/50 mbit/s\n");

  1466.                     return -1;

  1467.                 }

  1468. 

  1469.                 mxf->edit_unit_byte_count = KAG_SIZE; // system element

  1470.                 mxf->edit_unit_byte_count += 16 + 4 + (uint64_t)st->codec->bit_rate *

  1471.                     mxf->time_base.num / (8*mxf->time_base.den);

  1472.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1473.                 mxf->edit_unit_byte_count += 16 + 4 + 4 + samples_per_frame[0]*8*4;

  1474.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1475.             }

  1476.         } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

  1477.             if (st->codec->sample_rate != 48000) {

  1478.                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");

  1479.                 return -1;

  1480.             }

  1481.             avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);

  1482.             if (s->oformat == &ff_mxf_d10_muxer) {

  1483.                 if (st->index != 1) {

  1484.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support one audio track\n");

  1485.                     return -1;

  1486.                 }

  1487.                 if (st->codec->codec_id != CODEC_ID_PCM_S16LE &&

  1488.                     st->codec->codec_id != CODEC_ID_PCM_S24LE) {

  1489.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support 16 or 24 bits le audio\n");

  1490.                 }

  1491.                 sc->index = ((MXFStreamContext*)s->streams[0]->priv_data)->index + 1;

  1492.             } else

  1493.             mxf->slice_count = 1;

  1494.         }

  1495. 

  1496.         if (!sc->index) {

  1497.             sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);

  1498.             if (sc->index == -1) {

  1499.                 av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "

  1500.                        "codec not currently supported in container\n", i);

  1501.                 return -1;

  1502.             }

  1503.         }

  1504. 

  1505.         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;

  1506. 

  1507.         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);

  1508.         sc->track_essence_element_key[15] = present[sc->index];

  1509.         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);

  1510. 

  1511.         if (!present[sc->index])

  1512.             mxf->essence_container_count++;

  1513.         present[sc->index]++;

  1514.     }

  1515. 

  1516.     if (s->oformat == &ff_mxf_d10_muxer) {

  1517.         mxf->essence_container_count = 1;

  1518.     }

  1519. 

  1520.     if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))

  1521.         mxf_gen_umid(s);

  1522. 

  1523.     for (i = 0; i < s->nb_streams; i++) {

  1524.         MXFStreamContext *sc = s->streams[i]->priv_data;

  1525.         // update element count

  1526.         sc->track_essence_element_key[13] = present[sc->index];

  1527.         sc->order = AV_RB32(sc->track_essence_element_key+12);

  1528.     }

  1529. 

  1530.     if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))

  1531.         timestamp = ff_iso8601_to_unix_time(t->value);

  1532.     if (timestamp)

  1533.         mxf->timestamp = mxf_parse_timestamp(timestamp);

  1534.     mxf->duration = -1;

  1535. 

  1536.     mxf->timecode_track = av_mallocz(sizeof(*mxf->timecode_track));

  1537.     if (!mxf->timecode_track)

  1538.         return AVERROR(ENOMEM);

  1539.     mxf->timecode_track->priv_data = av_mallocz(sizeof(MXFStreamContext));

  1540.     if (!mxf->timecode_track->priv_data)

  1541.         return AVERROR(ENOMEM);

  1542.     mxf->timecode_track->index = -1;

  1543. 

  1544.     if (!samples_per_frame)

  1545.         samples_per_frame = PAL_samples_per_frame;

  1546. 

  1547.     if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)

  1548.         return -1;

  1549. 

  1550.     return 0;

  1551. }

  1552. 

  1553. static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };

  1554. 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 };

  1555. 

  1556. static void mxf_write_system_item(AVFormatContext *s)

  1557. {

  1558.     MXFContext *mxf = s->priv_data;

  1559.     AVIOContext *pb = s->pb;

  1560.     unsigned frame;

  1561.     uint32_t time_code;

  1562. 

  1563.     frame = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  1564. 

  1565.     // write system metadata pack

  1566.     avio_write(pb, system_metadata_pack_key, 16);

  1567.     klv_encode_ber4_length(pb, 57);

  1568.     avio_w8(pb, 0x5c); // UL, user date/time stamp, picture and sound item present

  1569.     avio_w8(pb, 0x04); // content package rate

  1570.     avio_w8(pb, 0x00); // content package type

  1571.     avio_wb16(pb, 0x00); // channel handle

  1572.     avio_wb16(pb, mxf->tc.start + frame); // continuity count

  1573.     if (mxf->essence_container_count > 1)

  1574.         avio_write(pb, multiple_desc_ul, 16);

  1575.     else {

  1576.         MXFStreamContext *sc = s->streams[0]->priv_data;

  1577.         avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);

  1578.     }

  1579.     avio_w8(pb, 0);

  1580.     avio_wb64(pb, 0);

  1581.     avio_wb64(pb, 0); // creation date/time stamp

  1582. 

  1583.     avio_w8(pb, 0x81); // SMPTE 12M time code

  1584.     time_code = av_timecode_get_smpte_from_framenum(&mxf->tc, frame);

  1585.     avio_wb32(pb, time_code);

  1586.     avio_wb32(pb, 0); // binary group data

  1587.     avio_wb64(pb, 0);

  1588. 

  1589.     // write system metadata package set

  1590.     avio_write(pb, system_metadata_package_set_key, 16);

  1591.     klv_encode_ber4_length(pb, 35);

  1592.     avio_w8(pb, 0x83); // UMID

  1593.     avio_wb16(pb, 0x20);

  1594.     mxf_write_umid(s, 1);

  1595. }

  1596. 

  1597. static void mxf_write_d10_video_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1598. {

  1599.     MXFContext *mxf = s->priv_data;

  1600.     AVIOContext *pb = s->pb;

  1601.     int packet_size = (uint64_t)st->codec->bit_rate*mxf->time_base.num /

  1602.         (8*mxf->time_base.den); // frame size

  1603.     int pad;

  1604. 

  1605.     packet_size += 16 + 4;

  1606.     packet_size += klv_fill_size(packet_size);

  1607. 

  1608.     klv_encode_ber4_length(pb, pkt->size);

  1609.     avio_write(pb, pkt->data, pkt->size);

  1610. 

  1611.     // ensure CBR muxing by padding to correct video frame size

  1612.     pad = packet_size - pkt->size - 16 - 4;

  1613.     if (pad > 20) {

  1614.         avio_write(s->pb, klv_fill_key, 16);

  1615.         pad -= 16 + 4;

  1616.         klv_encode_ber4_length(s->pb, pad);

  1617.         for (; pad; pad--)

  1618.             avio_w8(s->pb, 0);

  1619.         assert(!(avio_tell(s->pb) & (KAG_SIZE-1)));

  1620.     } else {

  1621.         av_log(s, AV_LOG_WARNING, "cannot fill d-10 video packet\n");

  1622.         for (; pad > 0; pad--)

  1623.             avio_w8(s->pb, 0);

  1624.     }

  1625. }

  1626. 

  1627. static void mxf_write_d10_audio_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1628. {

  1629.     MXFContext *mxf = s->priv_data;

  1630.     AVIOContext *pb = s->pb;

  1631.     int frame_size = pkt->size / st->codec->block_align;

  1632.     uint8_t *samples = pkt->data;

  1633.     uint8_t *end = pkt->data + pkt->size;

  1634.     int i;

  1635. 

  1636.     klv_encode_ber4_length(pb, 4 + frame_size*4*8);

  1637. 

  1638.     avio_w8(pb, (frame_size == 1920 ? 0 : (mxf->edit_units_count-1) % 5 + 1));

  1639.     avio_wl16(pb, frame_size);

  1640.     avio_w8(pb, (1<<st->codec->channels)-1);

  1641. 

  1642.     while (samples < end) {

  1643.         for (i = 0; i < st->codec->channels; i++) {

  1644.             uint32_t sample;

  1645.             if (st->codec->codec_id == CODEC_ID_PCM_S24LE) {

  1646.                 sample = AV_RL24(samples)<< 4;

  1647.                 samples += 3;

  1648.             } else {

  1649.                 sample = AV_RL16(samples)<<12;

  1650.                 samples += 2;

  1651.             }

  1652.             avio_wl32(pb, sample | i);

  1653.         }

  1654.         for (; i < 8; i++)

  1655.             avio_wl32(pb, i);

  1656.     }

  1657. }

  1658. 

  1659. static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)

  1660. {

  1661.     MXFContext *mxf = s->priv_data;

  1662.     AVIOContext *pb = s->pb;

  1663.     AVStream *st = s->streams[pkt->stream_index];

  1664.     MXFStreamContext *sc = st->priv_data;

  1665.     MXFIndexEntry ie = {0};

  1666. 

  1667.     if (!mxf->edit_unit_byte_count && !(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {

  1668.         mxf->index_entries = av_realloc(mxf->index_entries,

  1669.             (mxf->edit_units_count + EDIT_UNITS_PER_BODY)*sizeof(*mxf->index_entries));

  1670.         if (!mxf->index_entries) {

  1671.             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");

  1672.             return -1;

  1673.         }

  1674.     }

  1675. 

  1676.     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {

  1677.         if (!mxf_parse_mpeg2_frame(s, st, pkt, &ie)) {

  1678.             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");

  1679.             return -1;

  1680.         }

  1681.     }

  1682. 

  1683.     if (!mxf->header_written) {

  1684.         if (mxf->edit_unit_byte_count) {

  1685.             mxf_write_partition(s, 1, 2, header_open_partition_key, 1);

  1686.             mxf_write_klv_fill(s);

  1687.             mxf_write_index_table_segment(s);

  1688.         } else {

  1689.             mxf_write_partition(s, 0, 0, header_open_partition_key, 1);

  1690.         }

  1691.         mxf->header_written = 1;

  1692.     }

  1693. 

  1694.     if (st->index == 0) {

  1695.         if (!mxf->edit_unit_byte_count &&

  1696.             (!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&

  1697.             !(ie.flags & 0x33)) { // I frame, Gop start

  1698.             mxf_write_klv_fill(s);

  1699.             mxf_write_partition(s, 1, 2, body_partition_key, 0);

  1700. 

  1701.             mxf_write_klv_fill(s);

  1702.             mxf_write_index_table_segment(s);

  1703.         }

  1704. 

  1705.         mxf_write_klv_fill(s);

  1706.         mxf_write_system_item(s);

  1707. 

  1708.         if (!mxf->edit_unit_byte_count) {

  1709.             mxf->index_entries[mxf->edit_units_count].offset = mxf->body_offset;

  1710.             mxf->index_entries[mxf->edit_units_count].flags = ie.flags;

  1711.             mxf->index_entries[mxf->edit_units_count].temporal_ref = ie.temporal_ref;

  1712.             mxf->body_offset += KAG_SIZE; // size of system element

  1713.         }

  1714.         mxf->edit_units_count++;

  1715.     } else if (!mxf->edit_unit_byte_count && st->index == 1) {

  1716.         mxf->index_entries[mxf->edit_units_count-1].slice_offset =

  1717.             mxf->body_offset - mxf->index_entries[mxf->edit_units_count-1].offset;

  1718.     }

  1719. 

  1720.     mxf_write_klv_fill(s);

  1721.     avio_write(pb, sc->track_essence_element_key, 16); // write key

  1722.     if (s->oformat == &ff_mxf_d10_muxer) {

  1723.         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)

  1724.             mxf_write_d10_video_packet(s, st, pkt);

  1725.         else

  1726.             mxf_write_d10_audio_packet(s, st, pkt);

  1727.     } else {

  1728.         klv_encode_ber4_length(pb, pkt->size); // write length

  1729.         avio_write(pb, pkt->data, pkt->size);

  1730.         mxf->body_offset += 16+4+pkt->size + klv_fill_size(16+4+pkt->size);

  1731.     }

  1732. 

  1733.     avio_flush(pb);

  1734. 

  1735.     return 0;

  1736. }

  1737. 

  1738. static void mxf_write_random_index_pack(AVFormatContext *s)

  1739. {

  1740.     MXFContext *mxf = s->priv_data;

  1741.     AVIOContext *pb = s->pb;

  1742.     uint64_t pos = avio_tell(pb);

  1743.     int i;

  1744. 

  1745.     avio_write(pb, random_index_pack_key, 16);

  1746.     klv_encode_ber_length(pb, 28 + 12*mxf->body_partitions_count);

  1747. 

  1748.     if (mxf->edit_unit_byte_count)

  1749.         avio_wb32(pb, 1); // BodySID of header partition

  1750.     else

  1751.         avio_wb32(pb, 0);

  1752.     avio_wb64(pb, 0); // offset of header partition

  1753. 

  1754.     for (i = 0; i < mxf->body_partitions_count; i++) {

  1755.         avio_wb32(pb, 1); // BodySID

  1756.         avio_wb64(pb, mxf->body_partition_offset[i]);

  1757.     }

  1758. 

  1759.     avio_wb32(pb, 0); // BodySID of footer partition

  1760.     avio_wb64(pb, mxf->footer_partition_offset);

  1761. 

  1762.     avio_wb32(pb, avio_tell(pb) - pos + 4);

  1763. }

  1764. 

  1765. static int mxf_write_footer(AVFormatContext *s)

  1766. {

  1767.     MXFContext *mxf = s->priv_data;

  1768.     AVIOContext *pb = s->pb;

  1769. 

  1770.     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  1771. 

  1772.     mxf_write_klv_fill(s);

  1773.     mxf->footer_partition_offset = avio_tell(pb);

  1774.     if (mxf->edit_unit_byte_count) { // no need to repeat index

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

  1776.     } else {

  1777.         mxf_write_partition(s, 0, 2, footer_partition_key, 0);

  1778. 

  1779.         mxf_write_klv_fill(s);

  1780.         mxf_write_index_table_segment(s);

  1781.     }

  1782. 

  1783.     mxf_write_klv_fill(s);

  1784.     mxf_write_random_index_pack(s);

  1785. 

  1786.     if (s->pb->seekable) {

  1787.         avio_seek(pb, 0, SEEK_SET);

  1788.         if (mxf->edit_unit_byte_count) {

  1789.             mxf_write_partition(s, 1, 2, header_closed_partition_key, 1);

  1790.             mxf_write_klv_fill(s);

  1791.             mxf_write_index_table_segment(s);

  1792.         } else {

  1793.             mxf_write_partition(s, 0, 0, header_closed_partition_key, 1);

  1794.         }

  1795.     }

  1796. 

  1797.     avio_flush(pb);

  1798. 

  1799.     ff_audio_interleave_close(s);

  1800. 

  1801.     av_freep(&mxf->index_entries);

  1802.     av_freep(&mxf->body_partition_offset);

  1803.     av_freep(&mxf->timecode_track->priv_data);

  1804.     av_freep(&mxf->timecode_track);

  1805. 

  1806.     mxf_free(s);

  1807. 

  1808.     return 0;

  1809. }

  1810. 

  1811. static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  1812. {

  1813.     int i, stream_count = 0;

  1814. 

  1815.     for (i = 0; i < s->nb_streams; i++)

  1816.         stream_count += !!s->streams[i]->last_in_packet_buffer;

  1817. 

  1818.     if (stream_count && (s->nb_streams == stream_count || flush)) {

  1819.         AVPacketList *pktl = s->packet_buffer;

  1820.         if (s->nb_streams != stream_count) {

  1821.             AVPacketList *last = NULL;

  1822.             // find last packet in edit unit

  1823.             while (pktl) {

  1824.                 if (!stream_count || pktl->pkt.stream_index == 0)

  1825.                     break;

  1826.                 last = pktl;

  1827.                 pktl = pktl->next;

  1828.                 stream_count--;

  1829.             }

  1830.             // purge packet queue

  1831.             while (pktl) {

  1832.                 AVPacketList *next = pktl->next;

  1833. 

  1834.                 if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)

  1835.                     s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;

  1836.                 av_free_packet(&pktl->pkt);

  1837.                 av_freep(&pktl);

  1838.                 pktl = next;

  1839.             }

  1840.             if (last)

  1841.                 last->next = NULL;

  1842.             else {

  1843.                 s->packet_buffer = NULL;

  1844.                 s->packet_buffer_end= NULL;

  1845.                 goto out;

  1846.             }

  1847.             pktl = s->packet_buffer;

  1848.         }

  1849. 

  1850.         *out = pktl->pkt;

  1851.         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);

  1852.         s->packet_buffer = pktl->next;

  1853.         if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)

  1854.             s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;

  1855.         if(!s->packet_buffer)

  1856.             s->packet_buffer_end= NULL;

  1857.         av_freep(&pktl);

  1858.         return 1;

  1859.     } else {

  1860.     out:

  1861.         av_init_packet(out);

  1862.         return 0;

  1863.     }

  1864. }

  1865. 

  1866. static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)

  1867. {

  1868.     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;

  1869.     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;

  1870. 

  1871.     return next->dts > pkt->dts ||

  1872.         (next->dts == pkt->dts && sc->order < sc2->order);

  1873. }

  1874. 

  1875. static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  1876. {

  1877.     return ff_audio_rechunk_interleave(s, out, pkt, flush,

  1878.                                mxf_interleave_get_packet, mxf_compare_timestamps);

  1879. }

  1880. 

  1881. AVOutputFormat ff_mxf_muxer = {

  1882.     .name              = "mxf",

  1883.     .long_name         = NULL_IF_CONFIG_SMALL("Material eXchange Format"),

  1884.     .mime_type         = "application/mxf",

  1885.     .extensions        = "mxf",

  1886.     .priv_data_size    = sizeof(MXFContext),

  1887.     .audio_codec       = CODEC_ID_PCM_S16LE,

  1888.     .video_codec       = CODEC_ID_MPEG2VIDEO,

  1889.     .write_header      = mxf_write_header,

  1890.     .write_packet      = mxf_write_packet,

  1891.     .write_trailer     = mxf_write_footer,

  1892.     .flags             = AVFMT_NOTIMESTAMPS,

  1893.     .interleave_packet = mxf_interleave,

  1894. };

  1895. 

  1896. AVOutputFormat ff_mxf_d10_muxer = {

  1897.     .name              = "mxf_d10",

  1898.     .long_name         = NULL_IF_CONFIG_SMALL("Material eXchange Format, D-10 Mapping"),

  1899.     .mime_type         = "application/mxf",

  1900.     .priv_data_size    = sizeof(MXFContext),

  1901.     .audio_codec       = CODEC_ID_PCM_S16LE,

  1902.     .video_codec       = CODEC_ID_MPEG2VIDEO,

  1903.     .write_header      = mxf_write_header,

  1904.     .write_packet      = mxf_write_packet,

  1905.     .write_trailer     = mxf_write_footer,

  1906.     .flags             = AVFMT_NOTIMESTAMPS,

  1907.     .interleave_packet = mxf_interleave,

  1908. };