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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.     char *tc_opt_str;    ///< timecode option string

  193.     AVTimecode tc;       ///< timecode context

  194.     AVStream *timecode_track;

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

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

  197.     uint64_t body_offset;

  198.     uint32_t instance_number;

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

  200. } MXFContext;

  201. 

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

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

  204. 

  205. /**

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

  207.  */

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

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

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

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

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

  213. 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

  214. 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

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

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

  217. 

  218. /**

  219.  * partial key for header metadata

  220.  */

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

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

  223. 

  224. /**

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

  226.  */

  227. static const MXFLocalTagPair mxf_local_tag_batch[] = {

  228.     // preface set

  229.     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */

  230.     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */

  231.     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */

  232.     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */

  233.     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */

  234.     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */

  235.     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */

  236.     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */

  237.     // Identification

  238.     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */

  239.     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */

  240.     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */

  241.     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */

  242.     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */

  243.     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */

  244.     // Content Storage

  245.     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */

  246.     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */

  247.     // Essence Container Data

  248.     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */

  249.     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */

  250.     // Package

  251.     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */

  252.     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */

  253.     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */

  254.     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */

  255.     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */

  256.     // Track

  257.     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */

  258.     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */

  259.     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */

  260.     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */

  261.     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */

  262.     // Sequence

  263.     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */

  264.     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */

  265.     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */

  266.     // Source Clip

  267.     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */

  268.     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */

  269.     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */

  270.     // Timecode Component

  271.     { 0x1501, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x05,0x00,0x00}}, /* Start Time Code */

  272.     { 0x1502, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x04,0x01,0x01,0x02,0x06,0x00,0x00}}, /* Rounded Time Code Base */

  273.     { 0x1503, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x04,0x01,0x01,0x05,0x00,0x00,0x00}}, /* Drop Frame */

  274.     // File Descriptor

  275.     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */

  276.     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */

  277.     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */

  278.     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */

  279.     // Generic Picture Essence Descriptor

  280.     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */

  281.     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */

  282.     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */

  283.     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */

  284.     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */

  285.     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */

  286.     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */

  287.     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */

  288.     // CDCI Picture Essence Descriptor

  289.     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */

  290.     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */

  291.     // Generic Sound Essence Descriptor

  292.     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */

  293.     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */

  294.     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */

  295.     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */

  296.     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */

  297.     // Index Table Segment

  298.     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */

  299.     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */

  300.     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */

  301.     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */

  302.     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */

  303.     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */

  304.     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */

  305.     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */

  306.     // MPEG video Descriptor

  307.     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */

  308.     { 0x8007, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0A,0x00,0x00}}, /* ProfileAndLevel */

  309.     // Wave Audio Essence Descriptor

  310.     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */

  311.     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */

  312. };

  313. 

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

  315. {

  316.     avio_write(pb, uuid_base, 12);

  317.     avio_wb16(pb, type);

  318.     avio_wb16(pb, value);

  319. }

  320. 

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

  322. {

  323.     MXFContext *mxf = s->priv_data;

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

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

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

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

  328. }

  329. 

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

  331. {

  332.     avio_wb32(pb, ref_count);

  333.     avio_wb32(pb, 16);

  334. }

  335. 

  336. static int klv_ber_length(uint64_t len)

  337. {

  338.     if (len < 128)

  339.         return 1;

  340.     else

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

  342. }

  343. 

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

  345. {

  346.     // Determine the best BER size

  347.     int size;

  348.     if (len < 128) {

  349.         //short form

  350.         avio_w8(pb, len);

  351.         return 1;

  352.     }

  353. 

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

  355. 

  356.     // long form

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

  358.     while(size) {

  359.         size--;

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

  361.     }

  362.     return 0;

  363. }

  364. 

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

  366. {

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

  368.     avio_wb24(pb, len);

  369. }

  370. 

  371. /*

  372.  * Get essence container ul index

  373.  */

  374. static int mxf_get_essence_container_ul_index(enum CodecID id)

  375. {

  376.     int i;

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

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

  379.             return mxf_essence_mappings[i].index;

  380.     return -1;

  381. }

  382. 

  383. static void mxf_write_primer_pack(AVFormatContext *s)

  384. {

  385.     AVIOContext *pb = s->pb;

  386.     int local_tag_number, i = 0;

  387. 

  388.     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);

  389. 

  390.     avio_write(pb, primer_pack_key, 16);

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

  392. 

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

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

  395. 

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

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

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

  399.     }

  400. }

  401. 

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

  403. {

  404.     avio_wb16(pb, tag);

  405.     avio_wb16(pb, size);

  406. }

  407. 

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

  409. {

  410.     avio_write(pb, header_metadata_key, 13);

  411.     avio_wb24(pb, value);

  412. }

  413. 

  414. static void mxf_free(AVFormatContext *s)

  415. {

  416.     int i;

  417. 

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

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

  420.         av_freep(&st->priv_data);

  421.     }

  422. }

  423. 

  424. static const MXFCodecUL *mxf_get_data_definition_ul(int type)

  425. {

  426.     const MXFCodecUL *uls = ff_mxf_data_definition_uls;

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

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

  429.             break;

  430.         uls++;

  431.     }

  432.     return uls;

  433. }

  434. 

  435. static void mxf_write_essence_container_refs(AVFormatContext *s)

  436. {

  437.     MXFContext *c = s->priv_data;

  438.     AVIOContext *pb = s->pb;

  439.     int i;

  440. 

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

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

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

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

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

  446.     }

  447. }

  448. 

  449. static void mxf_write_preface(AVFormatContext *s)

  450. {

  451.     MXFContext *mxf = s->priv_data;

  452.     AVIOContext *pb = s->pb;

  453. 

  454.     mxf_write_metadata_key(pb, 0x012f00);

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

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

  457. 

  458.     // write preface set uid

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

  460.     mxf_write_uuid(pb, Preface, 0);

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

  462. 

  463.     // last modified date

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

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

  466. 

  467.     // write version

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

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

  470. 

  471.     // write identification_refs

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

  473.     mxf_write_refs_count(pb, 1);

  474.     mxf_write_uuid(pb, Identification, 0);

  475. 

  476.     // write content_storage_refs

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

  478.     mxf_write_uuid(pb, ContentStorage, 0);

  479. 

  480.     // operational pattern

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

  482.     avio_write(pb, op1a_ul, 16);

  483. 

  484.     // write essence_container_refs

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

  486.     mxf_write_essence_container_refs(s);

  487. 

  488.     // write dm_scheme_refs

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

  490.     avio_wb64(pb, 0);

  491. }

  492. 

  493. /*

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

  495.  */

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

  497. {

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

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

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

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

  502. }

  503. 

  504. static void mxf_write_identification(AVFormatContext *s)

  505. {

  506.     MXFContext *mxf = s->priv_data;

  507.     AVIOContext *pb = s->pb;

  508.     const char *company = "FFmpeg";

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

  510.     const char *version;

  511.     int length;

  512. 

  513.     mxf_write_metadata_key(pb, 0x013000);

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

  515. 

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

  517.         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);

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

  519.     klv_encode_ber_length(pb, length);

  520. 

  521.     // write uid

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

  523.     mxf_write_uuid(pb, Identification, 0);

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

  525. 

  526.     // write generation uid

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

  528.     mxf_write_uuid(pb, Identification, 1);

  529. 

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

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

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

  533. 

  534.     // write product uid

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

  536.     mxf_write_uuid(pb, Identification, 2);

  537. 

  538.     // modification date

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

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

  541. }

  542. 

  543. static void mxf_write_content_storage(AVFormatContext *s)

  544. {

  545.     AVIOContext *pb = s->pb;

  546. 

  547.     mxf_write_metadata_key(pb, 0x011800);

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

  549.     klv_encode_ber_length(pb, 92);

  550. 

  551.     // write uid

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

  553.     mxf_write_uuid(pb, ContentStorage, 0);

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

  555. 

  556.     // write package reference

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

  558.     mxf_write_refs_count(pb, 2);

  559.     mxf_write_uuid(pb, MaterialPackage, 0);

  560.     mxf_write_uuid(pb, SourcePackage, 0);

  561. 

  562.     // write essence container data

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

  564.     mxf_write_refs_count(pb, 1);

  565.     mxf_write_uuid(pb, EssenceContainerData, 0);

  566. }

  567. 

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

  569. {

  570.     MXFContext *mxf = s->priv_data;

  571.     AVIOContext *pb = s->pb;

  572.     MXFStreamContext *sc = st->priv_data;

  573. 

  574.     mxf_write_metadata_key(pb, 0x013b00);

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

  576.     klv_encode_ber_length(pb, 80);

  577. 

  578.     // write track uid

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

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

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

  582. 

  583.     // write track id

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

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

  586. 

  587.     // write track number

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

  589.     if (type == MaterialPackage)

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

  591.     else

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

  593. 

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

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

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

  597. 

  598.     // write origin

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

  600.     avio_wb64(pb, 0);

  601. 

  602.     // write sequence refs

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

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

  605. }

  606. 

  607. 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 };

  608. 

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

  610. {

  611.     MXFContext *mxf = s->priv_data;

  612.     AVIOContext *pb = s->pb;

  613. 

  614.     // find data define uls

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

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

  617.         avio_write(pb, smpte_12m_timecode_track_data_ul, 16);

  618.     else {

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

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

  621.     }

  622. 

  623.     // write duration

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

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

  626. }

  627. 

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

  629. {

  630.     MXFContext *mxf = s->priv_data;

  631.     AVIOContext *pb = s->pb;

  632.     enum MXFMetadataSetType component;

  633. 

  634.     mxf_write_metadata_key(pb, 0x010f00);

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

  636.     klv_encode_ber_length(pb, 80);

  637. 

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

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

  640. 

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

  642.     mxf_write_common_fields(s, st);

  643. 

  644.     // write structural component

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

  646.     mxf_write_refs_count(pb, 1);

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

  648.         component = TimecodeComponent;

  649.     else

  650.         component = SourceClip;

  651.     if (type == SourcePackage)

  652.         component += TypeBottom;

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

  654. }

  655. 

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

  657. {

  658.     MXFContext *mxf = s->priv_data;

  659.     AVIOContext *pb = s->pb;

  660. 

  661.     mxf_write_metadata_key(pb, 0x011400);

  662.     klv_encode_ber_length(pb, 75);

  663. 

  664.     // UID

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

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

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

  668. 

  669.     mxf_write_common_fields(s, st);

  670. 

  671.     // Start Time Code

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

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

  674. 

  675.     // Rounded Time Code Base

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

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

  678. 

  679.     // Drop Frame

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

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

  682. }

  683. 

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

  685. {

  686.     AVIOContext *pb = s->pb;

  687.     int i;

  688. 

  689.     mxf_write_metadata_key(pb, 0x011100);

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

  691.     klv_encode_ber_length(pb, 108);

  692. 

  693.     // write uid

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

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

  696. 

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

  698.     mxf_write_common_fields(s, st);

  699. 

  700.     // write start_position

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

  702.     avio_wb64(pb, 0);

  703. 

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

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

  706.     if (type == SourcePackage) {

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

  708.             avio_wb64(pb, 0);

  709.     } else

  710.         mxf_write_umid(s, 1);

  711. 

  712.     // write source track id

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

  714.     if (type == SourcePackage)

  715.         avio_wb32(pb, 0);

  716.     else

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

  718. }

  719. 

  720. static void mxf_write_multi_descriptor(AVFormatContext *s)

  721. {

  722.     MXFContext *mxf = s->priv_data;

  723.     AVIOContext *pb = s->pb;

  724.     const uint8_t *ul;

  725.     int i;

  726. 

  727.     mxf_write_metadata_key(pb, 0x014400);

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

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

  730. 

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

  732.     mxf_write_uuid(pb, MultipleDescriptor, 0);

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

  734. 

  735.     // write sample rate

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

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

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

  739. 

  740.     // write essence container ul

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

  742.     if (mxf->essence_container_count > 1)

  743.         ul = multiple_desc_ul;

  744.     else {

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

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

  747.     }

  748.     avio_write(pb, ul, 16);

  749. 

  750.     // write sub descriptor refs

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

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

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

  754.         mxf_write_uuid(pb, SubDescriptor, i);

  755. }

  756. 

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

  758. {

  759.     MXFContext *mxf = s->priv_data;

  760.     MXFStreamContext *sc = st->priv_data;

  761.     AVIOContext *pb = s->pb;

  762. 

  763.     avio_write(pb, key, 16);

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

  765. 

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

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

  768. 

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

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

  771. 

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

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

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

  775. 

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

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

  778. }

  779. 

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

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

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

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

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

  785. 

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

  787. {

  788.     MXFStreamContext *sc = st->priv_data;

  789.     AVIOContext *pb = s->pb;

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

  791.     int display_height;

  792.     int f1, f2;

  793. 

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

  795. 

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

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

  798. 

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

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

  801. 

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

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

  804. 

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

  806.         display_height = 576;

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

  808.         display_height = 486;

  809.     else

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

  811. 

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

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

  814. 

  815.     // component depth

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

  817.     avio_wb32(pb, 8);

  818. 

  819.     // horizontal subsampling

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

  821.     avio_wb32(pb, 2);

  822. 

  823.     // frame layout

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

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

  826. 

  827.     // video line map

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

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

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

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

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

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

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

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

  836.     }

  837. 

  838.     if (!sc->interlaced) {

  839.         f2  = 0;

  840.         f1 *= 2;

  841.     }

  842. 

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

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

  845.     avio_wb32(pb, 4);

  846.     avio_wb32(pb, f1);

  847.     if (sc->interlaced)

  848.         avio_wb32(pb, f2);

  849. 

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

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

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

  853. 

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

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

  856. }

  857. 

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

  859. {

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

  861. }

  862. 

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

  864. {

  865.     AVIOContext *pb = s->pb;

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

  867. 

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

  869. 

  870.     // bit rate

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

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

  873. 

  874.     // profile and level

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

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

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

  878.     avio_w8(pb, profile_and_level);

  879. }

  880. 

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

  882. {

  883.     AVIOContext *pb = s->pb;

  884. 

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

  886. 

  887.     // audio locked

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

  889.     avio_w8(pb, 1);

  890. 

  891.     // write audio sampling rate

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

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

  894.     avio_wb32(pb, 1);

  895. 

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

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

  898. 

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

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

  901. }

  902. 

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

  904. {

  905.     AVIOContext *pb = s->pb;

  906. 

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

  908. 

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

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

  911. 

  912.     // avg bytes per sec

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

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

  915. }

  916. 

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

  918. {

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

  920. }

  921. 

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

  923. {

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

  925. }

  926. 

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

  928. {

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

  930. }

  931. 

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

  933. {

  934.     MXFContext *mxf = s->priv_data;

  935.     AVIOContext *pb = s->pb;

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

  937. 

  938.     if (type == MaterialPackage) {

  939.         mxf_write_metadata_key(pb, 0x013600);

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

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

  942.     } else {

  943.         mxf_write_metadata_key(pb, 0x013700);

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

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

  946.     }

  947. 

  948.     // write uid

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

  950.     mxf_write_uuid(pb, type, 0);

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

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

  953. 

  954.     // write package umid

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

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

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

  958. 

  959.     // package creation date

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

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

  962. 

  963.     // package modified date

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

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

  966. 

  967.     // write track refs

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

  969.     mxf_write_refs_count(pb, track_count);

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

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

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

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

  974. 

  975.     // write multiple descriptor reference

  976.     if (type == SourcePackage) {

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

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

  979.             mxf_write_uuid(pb, MultipleDescriptor, 0);

  980.             mxf_write_multi_descriptor(s);

  981.         } else

  982.             mxf_write_uuid(pb, SubDescriptor, 0);

  983.     }

  984. 

  985.     // write timecode track

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

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

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

  989. 

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

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

  992.         mxf_write_track(s, st, type);

  993.         mxf_write_sequence(s, st, type);

  994.         mxf_write_structural_component(s, st, type);

  995. 

  996.         if (type == SourcePackage) {

  997.             MXFStreamContext *sc = st->priv_data;

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

  999.         }

  1000.     }

  1001. }

  1002. 

  1003. static int mxf_write_essence_container_data(AVFormatContext *s)

  1004. {

  1005.     AVIOContext *pb = s->pb;

  1006. 

  1007.     mxf_write_metadata_key(pb, 0x012300);

  1008.     klv_encode_ber_length(pb, 72);

  1009. 

  1010.     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID

  1011.     mxf_write_uuid(pb, EssenceContainerData, 0);

  1012. 

  1013.     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID

  1014.     mxf_write_umid(s, 1);

  1015. 

  1016.     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID

  1017.     avio_wb32(pb, 1);

  1018. 

  1019.     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID

  1020.     avio_wb32(pb, 2);

  1021. 

  1022.     return 0;

  1023. }

  1024. 

  1025. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  1026. {

  1027.     mxf_write_preface(s);

  1028.     mxf_write_identification(s);

  1029.     mxf_write_content_storage(s);

  1030.     mxf_write_package(s, MaterialPackage);

  1031.     mxf_write_package(s, SourcePackage);

  1032.     mxf_write_essence_container_data(s);

  1033.     return 0;

  1034. }

  1035. 

  1036. static unsigned klv_fill_size(uint64_t size)

  1037. {

  1038.     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));

  1039.     if (pad < 20) // smallest fill item possible

  1040.         return pad + KAG_SIZE;

  1041.     else

  1042.         return pad & (KAG_SIZE-1);

  1043. }

  1044. 

  1045. static void mxf_write_index_table_segment(AVFormatContext *s)

  1046. {

  1047.     MXFContext *mxf = s->priv_data;

  1048.     AVIOContext *pb = s->pb;

  1049.     int i, j, temporal_reordering = 0;

  1050.     int key_index = mxf->last_key_index;

  1051. 

  1052.     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);

  1053. 

  1054.     if (!mxf->edit_units_count && !mxf->edit_unit_byte_count)

  1055.         return;

  1056. 

  1057.     avio_write(pb, index_table_segment_key, 16);

  1058. 

  1059.     if (mxf->edit_unit_byte_count) {

  1060.         klv_encode_ber_length(pb, 80);

  1061.     } else {

  1062.         klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1)*6 +

  1063.                               12+mxf->edit_units_count*(11+mxf->slice_count*4));

  1064.     }

  1065. 

  1066.     // instance id

  1067.     mxf_write_local_tag(pb, 16, 0x3C0A);

  1068.     mxf_write_uuid(pb, IndexTableSegment, 0);

  1069. 

  1070.     // index edit rate

  1071.     mxf_write_local_tag(pb, 8, 0x3F0B);

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

  1073.     avio_wb32(pb, mxf->time_base.num);

  1074. 

  1075.     // index start position

  1076.     mxf_write_local_tag(pb, 8, 0x3F0C);

  1077.     avio_wb64(pb, mxf->last_indexed_edit_unit);

  1078. 

  1079.     // index duration

  1080.     mxf_write_local_tag(pb, 8, 0x3F0D);

  1081.     if (mxf->edit_unit_byte_count)

  1082.         avio_wb64(pb, 0); // index table covers whole container

  1083.     else

  1084.         avio_wb64(pb, mxf->edit_units_count);

  1085. 

  1086.     // edit unit byte count

  1087.     mxf_write_local_tag(pb, 4, 0x3F05);

  1088.     avio_wb32(pb, mxf->edit_unit_byte_count);

  1089. 

  1090.     // index sid

  1091.     mxf_write_local_tag(pb, 4, 0x3F06);

  1092.     avio_wb32(pb, 2);

  1093. 

  1094.     // body sid

  1095.     mxf_write_local_tag(pb, 4, 0x3F07);

  1096.     avio_wb32(pb, 1);

  1097. 

  1098.     if (!mxf->edit_unit_byte_count) {

  1099.         // real slice count - 1

  1100.         mxf_write_local_tag(pb, 1, 0x3F08);

  1101.         avio_w8(pb, mxf->slice_count);

  1102. 

  1103.         // delta entry array

  1104.         mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);

  1105.         avio_wb32(pb, s->nb_streams+1); // num of entries

  1106.         avio_wb32(pb, 6);               // size of one entry

  1107.         // write system item delta entry

  1108.         avio_w8(pb, 0);

  1109.         avio_w8(pb, 0); // slice entry

  1110.         avio_wb32(pb, 0); // element delta

  1111.         for (i = 0; i < s->nb_streams; i++) {

  1112.             AVStream *st = s->streams[i];

  1113.             MXFStreamContext *sc = st->priv_data;

  1114.             avio_w8(pb, sc->temporal_reordering);

  1115.             if (sc->temporal_reordering)

  1116.                 temporal_reordering = 1;

  1117.             if (i == 0) { // video track

  1118.                 avio_w8(pb, 0); // slice number

  1119.                 avio_wb32(pb, KAG_SIZE); // system item size including klv fill

  1120.             } else { // audio track

  1121.                 unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;

  1122.                 audio_frame_size += klv_fill_size(audio_frame_size);

  1123.                 avio_w8(pb, 1);

  1124.                 avio_wb32(pb, (i-1)*audio_frame_size); // element delta

  1125.             }

  1126.         }

  1127. 

  1128.         mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);

  1129.         avio_wb32(pb, mxf->edit_units_count);  // num of entries

  1130.         avio_wb32(pb, 11+mxf->slice_count*4);  // size of one entry

  1131. 

  1132.         for (i = 0; i < mxf->edit_units_count; i++) {

  1133.             int temporal_offset = 0;

  1134. 

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

  1136.                 mxf->last_key_index = key_index;

  1137.                 key_index = i;

  1138.             }

  1139. 

  1140.             if (temporal_reordering) {

  1141.                 int pic_num_in_gop = i - key_index;

  1142.                 if (pic_num_in_gop != mxf->index_entries[i].temporal_ref) {

  1143.                     for (j = key_index; j < mxf->edit_units_count; j++) {

  1144.                         if (pic_num_in_gop == mxf->index_entries[j].temporal_ref)

  1145.                             break;

  1146.                     }

  1147.                     if (j == mxf->edit_units_count)

  1148.                         av_log(s, AV_LOG_WARNING, "missing frames\n");

  1149.                     temporal_offset = j - key_index - pic_num_in_gop;

  1150.                 }

  1151.             }

  1152.             avio_w8(pb, temporal_offset);

  1153. 

  1154.             if ((mxf->index_entries[i].flags & 0x30) == 0x30) { // back and forward prediction

  1155.                 avio_w8(pb, mxf->last_key_index - i);

  1156.             } else {

  1157.                 avio_w8(pb, key_index - i); // key frame offset

  1158.                 if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward

  1159.                     mxf->last_key_index = key_index;

  1160.             }

  1161. 

  1162.             if (!(mxf->index_entries[i].flags & 0x33) && // I frame

  1163.                 mxf->index_entries[i].flags & 0x40 && !temporal_offset)

  1164.                 mxf->index_entries[i].flags |= 0x80; // random access

  1165.             avio_w8(pb, mxf->index_entries[i].flags);

  1166.             // stream offset

  1167.             avio_wb64(pb, mxf->index_entries[i].offset);

  1168.             if (s->nb_streams > 1)

  1169.                 avio_wb32(pb, mxf->index_entries[i].slice_offset);

  1170.         }

  1171. 

  1172.         mxf->last_key_index = key_index - mxf->edit_units_count;

  1173.         mxf->last_indexed_edit_unit += mxf->edit_units_count;

  1174.         mxf->edit_units_count = 0;

  1175.     }

  1176. }

  1177. 

  1178. static void mxf_write_klv_fill(AVFormatContext *s)

  1179. {

  1180.     unsigned pad = klv_fill_size(avio_tell(s->pb));

  1181.     if (pad) {

  1182.         avio_write(s->pb, klv_fill_key, 16);

  1183.         pad -= 16 + 4;

  1184.         klv_encode_ber4_length(s->pb, pad);

  1185.         for (; pad; pad--)

  1186.             avio_w8(s->pb, 0);

  1187.         assert(!(avio_tell(s->pb) & (KAG_SIZE-1)));

  1188.     }

  1189. }

  1190. 

  1191. static void mxf_write_partition(AVFormatContext *s, int bodysid,

  1192.                                 int indexsid,

  1193.                                 const uint8_t *key, int write_metadata)

  1194. {

  1195.     MXFContext *mxf = s->priv_data;

  1196.     AVIOContext *pb = s->pb;

  1197.     int64_t header_byte_count_offset;

  1198.     unsigned index_byte_count = 0;

  1199.     uint64_t partition_offset = avio_tell(pb);

  1200. 

  1201.     if (!mxf->edit_unit_byte_count && mxf->edit_units_count)

  1202.         index_byte_count = 85 + 12+(s->nb_streams+1)*6 +

  1203.             12+mxf->edit_units_count*(11+mxf->slice_count*4);

  1204.     else if (mxf->edit_unit_byte_count && indexsid)

  1205.         index_byte_count = 80;

  1206. 

  1207.     if (index_byte_count) {

  1208.         // add encoded ber length

  1209.         index_byte_count += 16 + klv_ber_length(index_byte_count);

  1210.         index_byte_count += klv_fill_size(index_byte_count);

  1211.     }

  1212. 

  1213.     if (!memcmp(key, body_partition_key, 16)) {

  1214.         mxf->body_partition_offset =

  1215.             av_realloc(mxf->body_partition_offset,

  1216.                        (mxf->body_partitions_count+1)*

  1217.                        sizeof(*mxf->body_partition_offset));

  1218.         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;

  1219.     }

  1220. 

  1221.     // write klv

  1222.     avio_write(pb, key, 16);

  1223.     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);

  1224. 

  1225.     // write partition value

  1226.     avio_wb16(pb, 1); // majorVersion

  1227.     avio_wb16(pb, 2); // minorVersion

  1228.     avio_wb32(pb, KAG_SIZE); // KAGSize

  1229. 

  1230.     avio_wb64(pb, partition_offset); // ThisPartition

  1231. 

  1232.     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)

  1233.         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition

  1234.     else if (!memcmp(key, footer_partition_key, 16) && mxf->body_partitions_count)

  1235.         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition

  1236.     else

  1237.         avio_wb64(pb, 0);

  1238. 

  1239.     avio_wb64(pb, mxf->footer_partition_offset); // footerPartition

  1240. 

  1241.     // set offset

  1242.     header_byte_count_offset = avio_tell(pb);

  1243.     avio_wb64(pb, 0); // headerByteCount, update later

  1244. 

  1245.     // indexTable

  1246.     avio_wb64(pb, index_byte_count); // indexByteCount

  1247.     avio_wb32(pb, index_byte_count ? indexsid : 0); // indexSID

  1248. 

  1249.     // BodyOffset

  1250.     if (bodysid && mxf->edit_units_count && mxf->body_partitions_count) {

  1251.         avio_wb64(pb, mxf->body_offset);

  1252.     } else

  1253.         avio_wb64(pb, 0);

  1254. 

  1255.     avio_wb32(pb, bodysid); // bodySID

  1256. 

  1257.     // operational pattern

  1258.     avio_write(pb, op1a_ul, 16);

  1259. 

  1260.     // essence container

  1261.     mxf_write_essence_container_refs(s);

  1262. 

  1263.     if (write_metadata) {

  1264.         // mark the start of the headermetadata and calculate metadata size

  1265.         int64_t pos, start;

  1266.         unsigned header_byte_count;

  1267. 

  1268.         mxf_write_klv_fill(s);

  1269.         start = avio_tell(s->pb);

  1270.         mxf_write_primer_pack(s);

  1271.         mxf_write_header_metadata_sets(s);

  1272.         pos = avio_tell(s->pb);

  1273.         header_byte_count = pos - start + klv_fill_size(pos);

  1274. 

  1275.         // update header_byte_count

  1276.         avio_seek(pb, header_byte_count_offset, SEEK_SET);

  1277.         avio_wb64(pb, header_byte_count);

  1278.         avio_seek(pb, pos, SEEK_SET);

  1279.     }

  1280. 

  1281.     avio_flush(pb);

  1282. }

  1283. 

  1284. static const UID mxf_mpeg2_codec_uls[] = {

  1285.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame

  1286.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP

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

  1288.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP

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

  1290.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP

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

  1292.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP

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

  1294.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x05,0x03,0x00 }, // MP@H-14 Long GOP

  1295. };

  1296. 

  1297. static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)

  1298. {

  1299.     int long_gop = avctx->gop_size > 1 || avctx->has_b_frames;

  1300. 

  1301.     if (avctx->profile == 4) { // Main

  1302.         if (avctx->level == 8) // Main

  1303.             return &mxf_mpeg2_codec_uls[0+long_gop];

  1304.         else if (avctx->level == 4) // High

  1305.             return &mxf_mpeg2_codec_uls[4+long_gop];

  1306.         else if (avctx->level == 6) // High 14

  1307.             return &mxf_mpeg2_codec_uls[8+long_gop];

  1308.     } else if (avctx->profile == 0) { // 422

  1309.         if (avctx->level == 5) // Main

  1310.             return &mxf_mpeg2_codec_uls[2+long_gop];

  1311.         else if (avctx->level == 2) // High

  1312.             return &mxf_mpeg2_codec_uls[6+long_gop];

  1313.     }

  1314.     return NULL;

  1315. }

  1316. 

  1317. static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st,

  1318.                                  AVPacket *pkt, MXFIndexEntry *e)

  1319. {

  1320.     MXFStreamContext *sc = st->priv_data;

  1321.     uint32_t c = -1;

  1322.     int i;

  1323. 

  1324.     for(i = 0; i < pkt->size - 4; i++) {

  1325.         c = (c<<8) + pkt->data[i];

  1326.         if (c == 0x1b5) {

  1327.             if ((pkt->data[i+1] & 0xf0) == 0x10) { // seq ext

  1328.                 st->codec->profile = pkt->data[i+1] & 0x07;

  1329.                 st->codec->level   = pkt->data[i+2] >> 4;

  1330.             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext

  1331.                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame

  1332.                 break;

  1333.             }

  1334.         } else if (c == 0x1b8) { // gop

  1335.             if (pkt->data[i+4]>>6 & 0x01) { // closed

  1336.                 sc->closed_gop = 1;

  1337.                 if (e->flags & 0x40) // sequence header present

  1338.                     e->flags |= 0x80; // random access

  1339.             }

  1340.         } else if (c == 0x1b3) { // seq

  1341.             e->flags |= 0x40;

  1342.             switch ((pkt->data[i+4]>>4) & 0xf) {

  1343.             case 2:  sc->aspect_ratio = (AVRational){  4,  3}; break;

  1344.             case 3:  sc->aspect_ratio = (AVRational){ 16,  9}; break;

  1345.             case 4:  sc->aspect_ratio = (AVRational){221,100}; break;

  1346.             default:

  1347.                 av_reduce(&sc->aspect_ratio.num, &sc->aspect_ratio.den,

  1348.                           st->codec->width, st->codec->height, 1024*1024);

  1349.             }

  1350.         } else if (c == 0x100) { // pic

  1351.             int pict_type = (pkt->data[i+2]>>3) & 0x07;

  1352.             e->temporal_ref = (pkt->data[i+1]<<2) | (pkt->data[i+2]>>6);

  1353.             if (pict_type == 2) { // P frame

  1354.                 e->flags |= 0x22;

  1355.                 sc->closed_gop = 0; // reset closed gop, don't matter anymore

  1356.             } else if (pict_type == 3) { // B frame

  1357.                 if (sc->closed_gop)

  1358.                     e->flags |= 0x13; // only backward prediction

  1359.                 else

  1360.                     e->flags |= 0x33;

  1361.                 sc->temporal_reordering = -1;

  1362.             } else if (!pict_type) {

  1363.                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");

  1364.                 return 0;

  1365.             }

  1366.         }

  1367.     }

  1368.     if (s->oformat != &ff_mxf_d10_muxer)

  1369.         sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);

  1370.     return !!sc->codec_ul;

  1371. }

  1372. 

  1373. static uint64_t mxf_parse_timestamp(time_t timestamp)

  1374. {

  1375.     struct tm *time = gmtime(&timestamp);

  1376.     if (!time)

  1377.         return 0;

  1378.     return (uint64_t)(time->tm_year+1900) << 48 |

  1379.            (uint64_t)(time->tm_mon+1)     << 40 |

  1380.            (uint64_t) time->tm_mday       << 32 |

  1381.                       time->tm_hour       << 24 |

  1382.                       time->tm_min        << 16 |

  1383.                       time->tm_sec        << 8;

  1384. }

  1385. 

  1386. static void mxf_gen_umid(AVFormatContext *s)

  1387. {

  1388.     MXFContext *mxf = s->priv_data;

  1389.     uint32_t seed = av_get_random_seed();

  1390.     uint64_t umid = seed + 0x5294713400000000LL;

  1391. 

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

  1393.     AV_WB64(mxf->umid+8, umid>>8);

  1394. 

  1395.     mxf->instance_number = seed;

  1396. }

  1397. 

  1398. static int mxf_write_header(AVFormatContext *s)

  1399. {

  1400.     MXFContext *mxf = s->priv_data;

  1401.     int i, ret;

  1402.     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};

  1403.     const int *samples_per_frame = NULL;

  1404.     AVDictionaryEntry *t;

  1405.     int64_t timestamp = 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 (mxf->tc_opt_str)

  1447.                 ret = av_timecode_init_from_string(&mxf->tc, rate,

  1448.                                                    mxf->tc_opt_str, s);

  1449.             else

  1450.                 ret = av_timecode_init(&mxf->tc, rate, 0, 0, s);

  1451.             if (ret < 0)

  1452.                 return ret;

  1453.             if (s->oformat == &ff_mxf_d10_muxer) {

  1454.                 if (st->codec->bit_rate == 50000000)

  1455.                     if (mxf->time_base.den == 25) sc->index = 3;

  1456.                     else                          sc->index = 5;

  1457.                 else if (st->codec->bit_rate == 40000000)

  1458.                     if (mxf->time_base.den == 25) sc->index = 7;

  1459.                     else                          sc->index = 9;

  1460.                 else if (st->codec->bit_rate == 30000000)

  1461.                     if (mxf->time_base.den == 25) sc->index = 11;

  1462.                     else                          sc->index = 13;

  1463.                 else {

  1464.                     av_log(s, AV_LOG_ERROR, "error MXF D-10 only support 30/40/50 mbit/s\n");

  1465.                     return -1;

  1466.                 }

  1467. 

  1468.                 mxf->edit_unit_byte_count = KAG_SIZE; // system element

  1469.                 mxf->edit_unit_byte_count += 16 + 4 + (uint64_t)st->codec->bit_rate *

  1470.                     mxf->time_base.num / (8*mxf->time_base.den);

  1471.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1472.                 mxf->edit_unit_byte_count += 16 + 4 + 4 + samples_per_frame[0]*8*4;

  1473.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1474.             }

  1475.         } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

  1476.             if (st->codec->sample_rate != 48000) {

  1477.                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");

  1478.                 return -1;

  1479.             }

  1480.             avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);

  1481.             if (s->oformat == &ff_mxf_d10_muxer) {

  1482.                 if (st->index != 1) {

  1483.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support one audio track\n");

  1484.                     return -1;

  1485.                 }

  1486.                 if (st->codec->codec_id != CODEC_ID_PCM_S16LE &&

  1487.                     st->codec->codec_id != CODEC_ID_PCM_S24LE) {

  1488.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support 16 or 24 bits le audio\n");

  1489.                 }

  1490.                 sc->index = ((MXFStreamContext*)s->streams[0]->priv_data)->index + 1;

  1491.             } else

  1492.             mxf->slice_count = 1;

  1493.         }

  1494. 

  1495.         if (!sc->index) {

  1496.             sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);

  1497.             if (sc->index == -1) {

  1498.                 av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "

  1499.                        "codec not currently supported in container\n", i);

  1500.                 return -1;

  1501.             }

  1502.         }

  1503. 

  1504.         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;

  1505. 

  1506.         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);

  1507.         sc->track_essence_element_key[15] = present[sc->index];

  1508.         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);

  1509. 

  1510.         if (!present[sc->index])

  1511.             mxf->essence_container_count++;

  1512.         present[sc->index]++;

  1513.     }

  1514. 

  1515.     if (s->oformat == &ff_mxf_d10_muxer) {

  1516.         mxf->essence_container_count = 1;

  1517.     }

  1518. 

  1519.     if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))

  1520.         mxf_gen_umid(s);

  1521. 

  1522.     for (i = 0; i < s->nb_streams; i++) {

  1523.         MXFStreamContext *sc = s->streams[i]->priv_data;

  1524.         // update element count

  1525.         sc->track_essence_element_key[13] = present[sc->index];

  1526.         sc->order = AV_RB32(sc->track_essence_element_key+12);

  1527.     }

  1528. 

  1529.     if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))

  1530.         timestamp = ff_iso8601_to_unix_time(t->value);

  1531.     if (timestamp)

  1532.         mxf->timestamp = mxf_parse_timestamp(timestamp);

  1533.     mxf->duration = -1;

  1534. 

  1535.     mxf->timecode_track = av_mallocz(sizeof(*mxf->timecode_track));

  1536.     if (!mxf->timecode_track)

  1537.         return AVERROR(ENOMEM);

  1538.     mxf->timecode_track->priv_data = av_mallocz(sizeof(MXFStreamContext));

  1539.     if (!mxf->timecode_track->priv_data)

  1540.         return AVERROR(ENOMEM);

  1541.     mxf->timecode_track->index = -1;

  1542. 

  1543.     if (!samples_per_frame)

  1544.         samples_per_frame = PAL_samples_per_frame;

  1545. 

  1546.     if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)

  1547.         return -1;

  1548. 

  1549.     return 0;

  1550. }

  1551. 

  1552. static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };

  1553. 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 };

  1554. 

  1555. static void mxf_write_system_item(AVFormatContext *s)

  1556. {

  1557.     MXFContext *mxf = s->priv_data;

  1558.     AVIOContext *pb = s->pb;

  1559.     unsigned frame;

  1560.     uint32_t time_code;

  1561. 

  1562.     frame = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  1563. 

  1564.     // write system metadata pack

  1565.     avio_write(pb, system_metadata_pack_key, 16);

  1566.     klv_encode_ber4_length(pb, 57);

  1567.     avio_w8(pb, 0x5c); // UL, user date/time stamp, picture and sound item present

  1568.     avio_w8(pb, 0x04); // content package rate

  1569.     avio_w8(pb, 0x00); // content package type

  1570.     avio_wb16(pb, 0x00); // channel handle

  1571.     avio_wb16(pb, mxf->tc.start + frame); // continuity count

  1572.     if (mxf->essence_container_count > 1)

  1573.         avio_write(pb, multiple_desc_ul, 16);

  1574.     else {

  1575.         MXFStreamContext *sc = s->streams[0]->priv_data;

  1576.         avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);

  1577.     }

  1578.     avio_w8(pb, 0);

  1579.     avio_wb64(pb, 0);

  1580.     avio_wb64(pb, 0); // creation date/time stamp

  1581. 

  1582.     avio_w8(pb, 0x81); // SMPTE 12M time code

  1583.     time_code = av_timecode_get_smpte_from_framenum(&mxf->tc, frame);

  1584.     avio_wb32(pb, time_code);

  1585.     avio_wb32(pb, 0); // binary group data

  1586.     avio_wb64(pb, 0);

  1587. 

  1588.     // write system metadata package set

  1589.     avio_write(pb, system_metadata_package_set_key, 16);

  1590.     klv_encode_ber4_length(pb, 35);

  1591.     avio_w8(pb, 0x83); // UMID

  1592.     avio_wb16(pb, 0x20);

  1593.     mxf_write_umid(s, 1);

  1594. }

  1595. 

  1596. static void mxf_write_d10_video_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1597. {

  1598.     MXFContext *mxf = s->priv_data;

  1599.     AVIOContext *pb = s->pb;

  1600.     int packet_size = (uint64_t)st->codec->bit_rate*mxf->time_base.num /

  1601.         (8*mxf->time_base.den); // frame size

  1602.     int pad;

  1603. 

  1604.     packet_size += 16 + 4;

  1605.     packet_size += klv_fill_size(packet_size);

  1606. 

  1607.     klv_encode_ber4_length(pb, pkt->size);

  1608.     avio_write(pb, pkt->data, pkt->size);

  1609. 

  1610.     // ensure CBR muxing by padding to correct video frame size

  1611.     pad = packet_size - pkt->size - 16 - 4;

  1612.     if (pad > 20) {

  1613.         avio_write(s->pb, klv_fill_key, 16);

  1614.         pad -= 16 + 4;

  1615.         klv_encode_ber4_length(s->pb, pad);

  1616.         for (; pad; pad--)

  1617.             avio_w8(s->pb, 0);

  1618.         assert(!(avio_tell(s->pb) & (KAG_SIZE-1)));

  1619.     } else {

  1620.         av_log(s, AV_LOG_WARNING, "cannot fill d-10 video packet\n");

  1621.         for (; pad > 0; pad--)

  1622.             avio_w8(s->pb, 0);

  1623.     }

  1624. }

  1625. 

  1626. static void mxf_write_d10_audio_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1627. {

  1628.     MXFContext *mxf = s->priv_data;

  1629.     AVIOContext *pb = s->pb;

  1630.     int frame_size = pkt->size / st->codec->block_align;

  1631.     uint8_t *samples = pkt->data;

  1632.     uint8_t *end = pkt->data + pkt->size;

  1633.     int i;

  1634. 

  1635.     klv_encode_ber4_length(pb, 4 + frame_size*4*8);

  1636. 

  1637.     avio_w8(pb, (frame_size == 1920 ? 0 : (mxf->edit_units_count-1) % 5 + 1));

  1638.     avio_wl16(pb, frame_size);

  1639.     avio_w8(pb, (1<<st->codec->channels)-1);

  1640. 

  1641.     while (samples < end) {

  1642.         for (i = 0; i < st->codec->channels; i++) {

  1643.             uint32_t sample;

  1644.             if (st->codec->codec_id == CODEC_ID_PCM_S24LE) {

  1645.                 sample = AV_RL24(samples)<< 4;

  1646.                 samples += 3;

  1647.             } else {

  1648.                 sample = AV_RL16(samples)<<12;

  1649.                 samples += 2;

  1650.             }

  1651.             avio_wl32(pb, sample | i);

  1652.         }

  1653.         for (; i < 8; i++)

  1654.             avio_wl32(pb, i);

  1655.     }

  1656. }

  1657. 

  1658. static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)

  1659. {

  1660.     MXFContext *mxf = s->priv_data;

  1661.     AVIOContext *pb = s->pb;

  1662.     AVStream *st = s->streams[pkt->stream_index];

  1663.     MXFStreamContext *sc = st->priv_data;

  1664.     MXFIndexEntry ie = {0};

  1665. 

  1666.     if (!mxf->edit_unit_byte_count && !(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {

  1667.         mxf->index_entries = av_realloc(mxf->index_entries,

  1668.             (mxf->edit_units_count + EDIT_UNITS_PER_BODY)*sizeof(*mxf->index_entries));

  1669.         if (!mxf->index_entries) {

  1670.             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");

  1671.             return -1;

  1672.         }

  1673.     }

  1674. 

  1675.     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {

  1676.         if (!mxf_parse_mpeg2_frame(s, st, pkt, &ie)) {

  1677.             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");

  1678.             return -1;

  1679.         }

  1680.     }

  1681. 

  1682.     if (!mxf->header_written) {

  1683.         if (mxf->edit_unit_byte_count) {

  1684.             mxf_write_partition(s, 1, 2, header_open_partition_key, 1);

  1685.             mxf_write_klv_fill(s);

  1686.             mxf_write_index_table_segment(s);

  1687.         } else {

  1688.             mxf_write_partition(s, 0, 0, header_open_partition_key, 1);

  1689.         }

  1690.         mxf->header_written = 1;

  1691.     }

  1692. 

  1693.     if (st->index == 0) {

  1694.         if (!mxf->edit_unit_byte_count &&

  1695.             (!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&

  1696.             !(ie.flags & 0x33)) { // I frame, Gop start

  1697.             mxf_write_klv_fill(s);

  1698.             mxf_write_partition(s, 1, 2, body_partition_key, 0);

  1699. 

  1700.             mxf_write_klv_fill(s);

  1701.             mxf_write_index_table_segment(s);

  1702.         }

  1703. 

  1704.         mxf_write_klv_fill(s);

  1705.         mxf_write_system_item(s);

  1706. 

  1707.         if (!mxf->edit_unit_byte_count) {

  1708.             mxf->index_entries[mxf->edit_units_count].offset = mxf->body_offset;

  1709.             mxf->index_entries[mxf->edit_units_count].flags = ie.flags;

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

  1711.             mxf->body_offset += KAG_SIZE; // size of system element

  1712.         }

  1713.         mxf->edit_units_count++;

  1714.     } else if (!mxf->edit_unit_byte_count && st->index == 1) {

  1715.         mxf->index_entries[mxf->edit_units_count-1].slice_offset =

  1716.             mxf->body_offset - mxf->index_entries[mxf->edit_units_count-1].offset;

  1717.     }

  1718. 

  1719.     mxf_write_klv_fill(s);

  1720.     avio_write(pb, sc->track_essence_element_key, 16); // write key

  1721.     if (s->oformat == &ff_mxf_d10_muxer) {

  1722.         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)

  1723.             mxf_write_d10_video_packet(s, st, pkt);

  1724.         else

  1725.             mxf_write_d10_audio_packet(s, st, pkt);

  1726.     } else {

  1727.         klv_encode_ber4_length(pb, pkt->size); // write length

  1728.         avio_write(pb, pkt->data, pkt->size);

  1729.         mxf->body_offset += 16+4+pkt->size + klv_fill_size(16+4+pkt->size);

  1730.     }

  1731. 

  1732.     avio_flush(pb);

  1733. 

  1734.     return 0;

  1735. }

  1736. 

  1737. static void mxf_write_random_index_pack(AVFormatContext *s)

  1738. {

  1739.     MXFContext *mxf = s->priv_data;

  1740.     AVIOContext *pb = s->pb;

  1741.     uint64_t pos = avio_tell(pb);

  1742.     int i;

  1743. 

  1744.     avio_write(pb, random_index_pack_key, 16);

  1745.     klv_encode_ber_length(pb, 28 + 12*mxf->body_partitions_count);

  1746. 

  1747.     if (mxf->edit_unit_byte_count)

  1748.         avio_wb32(pb, 1); // BodySID of header partition

  1749.     else

  1750.         avio_wb32(pb, 0);

  1751.     avio_wb64(pb, 0); // offset of header partition

  1752. 

  1753.     for (i = 0; i < mxf->body_partitions_count; i++) {

  1754.         avio_wb32(pb, 1); // BodySID

  1755.         avio_wb64(pb, mxf->body_partition_offset[i]);

  1756.     }

  1757. 

  1758.     avio_wb32(pb, 0); // BodySID of footer partition

  1759.     avio_wb64(pb, mxf->footer_partition_offset);

  1760. 

  1761.     avio_wb32(pb, avio_tell(pb) - pos + 4);

  1762. }

  1763. 

  1764. static int mxf_write_footer(AVFormatContext *s)

  1765. {

  1766.     MXFContext *mxf = s->priv_data;

  1767.     AVIOContext *pb = s->pb;

  1768. 

  1769.     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  1770. 

  1771.     mxf_write_klv_fill(s);

  1772.     mxf->footer_partition_offset = avio_tell(pb);

  1773.     if (mxf->edit_unit_byte_count) { // no need to repeat index

  1774.         mxf_write_partition(s, 0, 0, footer_partition_key, 0);

  1775.     } else {

  1776.         mxf_write_partition(s, 0, 2, footer_partition_key, 0);

  1777. 

  1778.         mxf_write_klv_fill(s);

  1779.         mxf_write_index_table_segment(s);

  1780.     }

  1781. 

  1782.     mxf_write_klv_fill(s);

  1783.     mxf_write_random_index_pack(s);

  1784. 

  1785.     if (s->pb->seekable) {

  1786.         avio_seek(pb, 0, SEEK_SET);

  1787.         if (mxf->edit_unit_byte_count) {

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

  1789.             mxf_write_klv_fill(s);

  1790.             mxf_write_index_table_segment(s);

  1791.         } else {

  1792.             mxf_write_partition(s, 0, 0, header_closed_partition_key, 1);

  1793.         }

  1794.     }

  1795. 

  1796.     avio_flush(pb);

  1797. 

  1798.     ff_audio_interleave_close(s);

  1799. 

  1800.     av_freep(&mxf->index_entries);

  1801.     av_freep(&mxf->body_partition_offset);

  1802.     av_freep(&mxf->timecode_track->priv_data);

  1803.     av_freep(&mxf->timecode_track);

  1804. 

  1805.     mxf_free(s);

  1806. 

  1807.     return 0;

  1808. }

  1809. 

  1810. static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  1811. {

  1812.     int i, stream_count = 0;

  1813. 

  1814.     for (i = 0; i < s->nb_streams; i++)

  1815.         stream_count += !!s->streams[i]->last_in_packet_buffer;

  1816. 

  1817.     if (stream_count && (s->nb_streams == stream_count || flush)) {

  1818.         AVPacketList *pktl = s->packet_buffer;

  1819.         if (s->nb_streams != stream_count) {

  1820.             AVPacketList *last = NULL;

  1821.             // find last packet in edit unit

  1822.             while (pktl) {

  1823.                 if (!stream_count || pktl->pkt.stream_index == 0)

  1824.                     break;

  1825.                 last = pktl;

  1826.                 pktl = pktl->next;

  1827.                 stream_count--;

  1828.             }

  1829.             // purge packet queue

  1830.             while (pktl) {

  1831.                 AVPacketList *next = pktl->next;

  1832. 

  1833.                 if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)

  1834.                     s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;

  1835.                 av_free_packet(&pktl->pkt);

  1836.                 av_freep(&pktl);

  1837.                 pktl = next;

  1838.             }

  1839.             if (last)

  1840.                 last->next = NULL;

  1841.             else {

  1842.                 s->packet_buffer = NULL;

  1843.                 s->packet_buffer_end= NULL;

  1844.                 goto out;

  1845.             }

  1846.             pktl = s->packet_buffer;

  1847.         }

  1848. 

  1849.         *out = pktl->pkt;

  1850.         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);

  1851.         s->packet_buffer = pktl->next;

  1852.         if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)

  1853.             s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;

  1854.         if(!s->packet_buffer)

  1855.             s->packet_buffer_end= NULL;

  1856.         av_freep(&pktl);

  1857.         return 1;

  1858.     } else {

  1859.     out:

  1860.         av_init_packet(out);

  1861.         return 0;

  1862.     }

  1863. }

  1864. 

  1865. static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)

  1866. {

  1867.     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;

  1868.     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;

  1869. 

  1870.     return next->dts > pkt->dts ||

  1871.         (next->dts == pkt->dts && sc->order < sc2->order);

  1872. }

  1873. 

  1874. static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  1875. {

  1876.     return ff_audio_rechunk_interleave(s, out, pkt, flush,

  1877.                                mxf_interleave_get_packet, mxf_compare_timestamps);

  1878. }

  1879. 

  1880. static const AVClass mxf_class = {

  1881.     .class_name = "mxf",

  1882.     .item_name  = av_default_item_name,

  1883.     .version    = LIBAVUTIL_VERSION_INT,

  1884.     .option     = (const AVOption[]){

  1885.         {AV_TIMECODE_OPTION(MXFContext, tc_opt_str, AV_OPT_FLAG_ENCODING_PARAM)},

  1886.         {NULL}

  1887.     },

  1888. };

  1889. 

  1890. static const AVClass mxf_d10_class = {

  1891.     .class_name = "mxf_d10",

  1892.     .item_name  = av_default_item_name,

  1893.     .version    = LIBAVUTIL_VERSION_INT,

  1894.     .option     = (const AVOption[]){

  1895.         {AV_TIMECODE_OPTION(MXFContext, tc_opt_str, AV_OPT_FLAG_ENCODING_PARAM)},

  1896.         {NULL}

  1897.     },

  1898. };

  1899. 

  1900. AVOutputFormat ff_mxf_muxer = {

  1901.     .name              = "mxf",

  1902.     .long_name         = NULL_IF_CONFIG_SMALL("Material eXchange Format"),

  1903.     .mime_type         = "application/mxf",

  1904.     .extensions        = "mxf",

  1905.     .priv_data_size    = sizeof(MXFContext),

  1906.     .audio_codec       = CODEC_ID_PCM_S16LE,

  1907.     .video_codec       = CODEC_ID_MPEG2VIDEO,

  1908.     .write_header      = mxf_write_header,

  1909.     .write_packet      = mxf_write_packet,

  1910.     .write_trailer     = mxf_write_footer,

  1911.     .flags             = AVFMT_NOTIMESTAMPS,

  1912.     .interleave_packet = mxf_interleave,

  1913.     .priv_class        = &mxf_class,

  1914. };

  1915. 

  1916. AVOutputFormat ff_mxf_d10_muxer = {

  1917.     .name              = "mxf_d10",

  1918.     .long_name         = NULL_IF_CONFIG_SMALL("Material eXchange Format, D-10 Mapping"),

  1919.     .mime_type         = "application/mxf",

  1920.     .priv_data_size    = sizeof(MXFContext),

  1921.     .audio_codec       = CODEC_ID_PCM_S16LE,

  1922.     .video_codec       = CODEC_ID_MPEG2VIDEO,

  1923.     .write_header      = mxf_write_header,

  1924.     .write_packet      = mxf_write_packet,

  1925.     .write_trailer     = mxf_write_footer,

  1926.     .flags             = AVFMT_NOTIMESTAMPS,

  1927.     .interleave_packet = mxf_interleave,

  1928.     .priv_class        = &mxf_d10_class,

  1929. };