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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 Libav.

  7.  *

  8.  * Libav 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.  * Libav 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 Libav; 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. #include <inttypes.h>

  34. #include <math.h>

  35. #include <time.h>

  36. 

  37. #include "libavutil/random_seed.h"

  38. #include "libavutil/time_internal.h"

  39. #include "libavcodec/bytestream.h"

  40. #include "audiointerleave.h"

  41. #include "avformat.h"

  42. #include "internal.h"

  43. #include "mxf.h"

  44. 

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

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

  47. 

  48. extern AVOutputFormat ff_mxf_d10_muxer;

  49. 

  50. #define EDIT_UNITS_PER_BODY 250

  51. #define KAG_SIZE 512

  52. 

  53. typedef struct MXFLocalTagPair {

  54.     int local_tag;

  55.     UID uid;

  56. } MXFLocalTagPair;

  57. 

  58. typedef struct MXFIndexEntry {

  59.     uint8_t flags;

  60.     uint64_t offset;

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

  62.     uint16_t temporal_ref;

  63. } MXFIndexEntry;

  64. 

  65. typedef struct MXFStreamContext {

  66.     AudioInterleaveContext aic;

  67.     UID track_essence_element_key;

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

  69.     const UID *codec_ul;

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

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

  72.     int temporal_reordering;

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

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

  75. } MXFStreamContext;

  76. 

  77. typedef struct MXFContainerEssenceEntry {

  78.     UID container_ul;

  79.     UID element_ul;

  80.     UID codec_ul;

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

  82. } MXFContainerEssenceEntry;

  83. 

  84. static const struct {

  85.     enum AVCodecID id;

  86.     int index;

  87. } mxf_essence_mappings[] = {

  88.     { AV_CODEC_ID_MPEG2VIDEO, 0 },

  89.     { AV_CODEC_ID_PCM_S24LE,  1 },

  90.     { AV_CODEC_ID_PCM_S16LE,  1 },

  91.     { AV_CODEC_ID_NONE }

  92. };

  93. 

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

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

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

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

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

  99. 

  100. static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {

  101.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },

  102.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  103.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },

  104.       mxf_write_mpegvideo_desc },

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

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

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

  108.       mxf_write_aes3_desc },

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

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

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

  112.       mxf_write_wav_desc },

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

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

  115.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  117.       mxf_write_cdci_desc },

  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,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  120.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  121.       mxf_write_generic_sound_desc },

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

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

  124.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  126.       mxf_write_cdci_desc },

  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,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  129.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  130.       mxf_write_generic_sound_desc },

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

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

  133.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

  134.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x03 },

  135.       mxf_write_cdci_desc },

  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,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  138.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  139.       mxf_write_generic_sound_desc },

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

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

  142.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  144.       mxf_write_cdci_desc },

  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,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  147.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  148.       mxf_write_generic_sound_desc },

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

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

  151.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

  152.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 },

  153.       mxf_write_cdci_desc },

  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,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  156.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  157.       mxf_write_generic_sound_desc },

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

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

  160.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  162.       mxf_write_cdci_desc },

  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,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  165.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  166.       mxf_write_generic_sound_desc },

  167.     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  168.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  169.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  170.       NULL },

  171. };

  172. 

  173. typedef struct MXFContext {

  174.     int64_t footer_partition_offset;

  175.     int essence_container_count;

  176.     AVRational time_base;

  177.     int header_written;

  178.     MXFIndexEntry *index_entries;

  179.     unsigned edit_units_count;

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

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

  182.     int last_indexed_edit_unit;

  183.     uint64_t *body_partition_offset;

  184.     unsigned body_partitions_count;

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

  186.     uint64_t duration;

  187.     AVStream *timecode_track;

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

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

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

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

  192.     uint64_t body_offset;

  193.     uint32_t instance_number;

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

  195. } MXFContext;

  196. 

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

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

  199. 

  200. /**

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

  202.  */

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

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

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

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

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

  208. 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

  209. 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

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

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

  212. 

  213. /**

  214.  * partial key for header metadata

  215.  */

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

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

  218. 

  219. /**

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

  221.  */

  222. static const MXFLocalTagPair mxf_local_tag_batch[] = {

  223.     // preface set

  224.     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */

  225.     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */

  226.     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */

  227.     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */

  228.     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */

  229.     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */

  230.     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */

  231.     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */

  232.     // Identification

  233.     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */

  234.     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */

  235.     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */

  236.     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */

  237.     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */

  238.     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */

  239.     // Content Storage

  240.     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */

  241.     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */

  242.     // Essence Container Data

  243.     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */

  244.     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */

  245.     // Package

  246.     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */

  247.     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */

  248.     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */

  249.     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */

  250.     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */

  251.     // Track

  252.     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */

  253.     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */

  254.     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */

  255.     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */

  256.     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */

  257.     // Sequence

  258.     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */

  259.     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */

  260.     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */

  261.     // Source Clip

  262.     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */

  263.     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */

  264.     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */

  265.     // Timecode Component

  266.     { 0x1501, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x05,0x00,0x00}}, /* Start Time Code */

  267.     { 0x1502, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x04,0x01,0x01,0x02,0x06,0x00,0x00}}, /* Rounded Time Code Base */

  268.     { 0x1503, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x04,0x01,0x01,0x05,0x00,0x00,0x00}}, /* Drop Frame */

  269.     // File Descriptor

  270.     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */

  271.     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */

  272.     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */

  273.     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */

  274.     // Generic Picture Essence Descriptor

  275.     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */

  276.     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */

  277.     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */

  278.     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */

  279.     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */

  280.     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */

  281.     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */

  282.     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */

  283.     // CDCI Picture Essence Descriptor

  284.     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */

  285.     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */

  286.     // Generic Sound Essence Descriptor

  287.     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */

  288.     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */

  289.     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */

  290.     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */

  291.     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */

  292.     // Index Table Segment

  293.     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */

  294.     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */

  295.     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */

  296.     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */

  297.     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */

  298.     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */

  299.     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */

  300.     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */

  301.     // MPEG video Descriptor

  302.     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */

  303.     { 0x8007, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0A,0x00,0x00}}, /* ProfileAndLevel */

  304.     // Wave Audio Essence Descriptor

  305.     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */

  306.     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */

  307. };

  308. 

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

  310. {

  311.     avio_write(pb, uuid_base, 12);

  312.     avio_wb16(pb, type);

  313.     avio_wb16(pb, value);

  314. }

  315. 

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

  317. {

  318.     MXFContext *mxf = s->priv_data;

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

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

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

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

  323. }

  324. 

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

  326. {

  327.     avio_wb32(pb, ref_count);

  328.     avio_wb32(pb, 16);

  329. }

  330. 

  331. static int klv_ber_length(uint64_t len)

  332. {

  333.     if (len < 128)

  334.         return 1;

  335.     else

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

  337. }

  338. 

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

  340. {

  341.     // Determine the best BER size

  342.     int size;

  343.     if (len < 128) {

  344.         //short form

  345.         avio_w8(pb, len);

  346.         return 1;

  347.     }

  348. 

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

  350. 

  351.     // long form

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

  353.     while(size) {

  354.         size--;

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

  356.     }

  357.     return 0;

  358. }

  359. 

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

  361. {

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

  363.     avio_wb24(pb, len);

  364. }

  365. 

  366. /*

  367.  * Get essence container ul index

  368.  */

  369. static int mxf_get_essence_container_ul_index(enum AVCodecID id)

  370. {

  371.     int i;

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

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

  374.             return mxf_essence_mappings[i].index;

  375.     return -1;

  376. }

  377. 

  378. static void mxf_write_primer_pack(AVFormatContext *s)

  379. {

  380.     AVIOContext *pb = s->pb;

  381.     int local_tag_number, i = 0;

  382. 

  383.     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);

  384. 

  385.     avio_write(pb, primer_pack_key, 16);

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

  387. 

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

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

  390. 

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

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

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

  394.     }

  395. }

  396. 

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

  398. {

  399.     avio_wb16(pb, tag);

  400.     avio_wb16(pb, size);

  401. }

  402. 

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

  404. {

  405.     avio_write(pb, header_metadata_key, 13);

  406.     avio_wb24(pb, value);

  407. }

  408. 

  409. static void mxf_free(AVFormatContext *s)

  410. {

  411.     int i;

  412. 

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

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

  415.         av_freep(&st->priv_data);

  416.     }

  417. }

  418. 

  419. static const MXFCodecUL *mxf_get_data_definition_ul(int type)

  420. {

  421.     const MXFCodecUL *uls = ff_mxf_data_definition_uls;

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

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

  424.             break;

  425.         uls++;

  426.     }

  427.     return uls;

  428. }

  429. 

  430. static void mxf_write_essence_container_refs(AVFormatContext *s)

  431. {

  432.     MXFContext *c = s->priv_data;

  433.     AVIOContext *pb = s->pb;

  434.     int i;

  435. 

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

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

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

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

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

  441.     }

  442. }

  443. 

  444. static void mxf_write_preface(AVFormatContext *s)

  445. {

  446.     MXFContext *mxf = s->priv_data;

  447.     AVIOContext *pb = s->pb;

  448. 

  449.     mxf_write_metadata_key(pb, 0x012f00);

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

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

  452. 

  453.     // write preface set uid

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

  455.     mxf_write_uuid(pb, Preface, 0);

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

  457. 

  458.     // last modified date

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

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

  461. 

  462.     // write version

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

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

  465. 

  466.     // write identification_refs

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

  468.     mxf_write_refs_count(pb, 1);

  469.     mxf_write_uuid(pb, Identification, 0);

  470. 

  471.     // write content_storage_refs

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

  473.     mxf_write_uuid(pb, ContentStorage, 0);

  474. 

  475.     // operational pattern

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

  477.     avio_write(pb, op1a_ul, 16);

  478. 

  479.     // write essence_container_refs

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

  481.     mxf_write_essence_container_refs(s);

  482. 

  483.     // write dm_scheme_refs

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

  485.     avio_wb64(pb, 0);

  486. }

  487. 

  488. /*

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

  490.  */

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

  492. {

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

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

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

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

  497. }

  498. 

  499. static void mxf_write_identification(AVFormatContext *s)

  500. {

  501.     MXFContext *mxf = s->priv_data;

  502.     AVIOContext *pb = s->pb;

  503.     const char *company = "Libav";

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

  505.     const char *version;

  506.     int length;

  507. 

  508.     mxf_write_metadata_key(pb, 0x013000);

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

  510. 

  511.     version = s->flags & AVFMT_FLAG_BITEXACT ?

  512.         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);

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

  514.     klv_encode_ber_length(pb, length);

  515. 

  516.     // write uid

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

  518.     mxf_write_uuid(pb, Identification, 0);

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

  520. 

  521.     // write generation uid

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

  523.     mxf_write_uuid(pb, Identification, 1);

  524. 

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

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

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

  528. 

  529.     // write product uid

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

  531.     mxf_write_uuid(pb, Identification, 2);

  532. 

  533.     // modification date

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

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

  536. }

  537. 

  538. static void mxf_write_content_storage(AVFormatContext *s)

  539. {

  540.     AVIOContext *pb = s->pb;

  541. 

  542.     mxf_write_metadata_key(pb, 0x011800);

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

  544.     klv_encode_ber_length(pb, 92);

  545. 

  546.     // write uid

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

  548.     mxf_write_uuid(pb, ContentStorage, 0);

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

  550. 

  551.     // write package reference

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

  553.     mxf_write_refs_count(pb, 2);

  554.     mxf_write_uuid(pb, MaterialPackage, 0);

  555.     mxf_write_uuid(pb, SourcePackage, 0);

  556. 

  557.     // write essence container data

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

  559.     mxf_write_refs_count(pb, 1);

  560.     mxf_write_uuid(pb, EssenceContainerData, 0);

  561. }

  562. 

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

  564. {

  565.     MXFContext *mxf = s->priv_data;

  566.     AVIOContext *pb = s->pb;

  567.     MXFStreamContext *sc = st->priv_data;

  568. 

  569.     mxf_write_metadata_key(pb, 0x013b00);

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

  571.     klv_encode_ber_length(pb, 80);

  572. 

  573.     // write track uid

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

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

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

  577. 

  578.     // write track id

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

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

  581. 

  582.     // write track number

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

  584.     if (type == MaterialPackage)

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

  586.     else

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

  588. 

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

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

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

  592. 

  593.     // write origin

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

  595.     avio_wb64(pb, 0);

  596. 

  597.     // write sequence refs

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

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

  600. }

  601. 

  602. 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 };

  603. 

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

  605. {

  606.     MXFContext *mxf = s->priv_data;

  607.     AVIOContext *pb = s->pb;

  608. 

  609.     // find data define uls

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

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

  612.         avio_write(pb, smpte_12m_timecode_track_data_ul, 16);

  613.     else {

  614.         const MXFCodecUL *data_def_ul = mxf_get_data_definition_ul(st->codecpar->codec_type);

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

  616.     }

  617. 

  618.     // write duration

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

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

  621. }

  622. 

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

  624. {

  625.     MXFContext *mxf = s->priv_data;

  626.     AVIOContext *pb = s->pb;

  627.     enum MXFMetadataSetType component;

  628. 

  629.     mxf_write_metadata_key(pb, 0x010f00);

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

  631.     klv_encode_ber_length(pb, 80);

  632. 

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

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

  635. 

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

  637.     mxf_write_common_fields(s, st);

  638. 

  639.     // write structural component

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

  641.     mxf_write_refs_count(pb, 1);

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

  643.         component = TimecodeComponent;

  644.     else

  645.         component = SourceClip;

  646.     if (type == SourcePackage)

  647.         component += TypeBottom;

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

  649. }

  650. 

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

  652. {

  653.     MXFContext *mxf = s->priv_data;

  654.     AVIOContext *pb = s->pb;

  655. 

  656.     mxf_write_metadata_key(pb, 0x011400);

  657.     klv_encode_ber_length(pb, 75);

  658. 

  659.     // UID

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

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

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

  663. 

  664.     mxf_write_common_fields(s, st);

  665. 

  666.     // Start Time Code

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

  668.     avio_wb64(pb, mxf->timecode_start);

  669. 

  670.     // Rounded Time Code Base

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

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

  673. 

  674.     // Drop Frame

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

  676.     avio_w8(pb, mxf->timecode_drop_frame);

  677. }

  678. 

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

  680. {

  681.     AVIOContext *pb = s->pb;

  682.     int i;

  683. 

  684.     mxf_write_metadata_key(pb, 0x011100);

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

  686.     klv_encode_ber_length(pb, 108);

  687. 

  688.     // write uid

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

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

  691. 

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

  693.     mxf_write_common_fields(s, st);

  694. 

  695.     // write start_position

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

  697.     avio_wb64(pb, 0);

  698. 

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

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

  701.     if (type == SourcePackage) {

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

  703.             avio_wb64(pb, 0);

  704.     } else

  705.         mxf_write_umid(s, 1);

  706. 

  707.     // write source track id

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

  709.     if (type == SourcePackage)

  710.         avio_wb32(pb, 0);

  711.     else

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

  713. }

  714. 

  715. static void mxf_write_multi_descriptor(AVFormatContext *s)

  716. {

  717.     MXFContext *mxf = s->priv_data;

  718.     AVIOContext *pb = s->pb;

  719.     const uint8_t *ul;

  720.     int i;

  721. 

  722.     mxf_write_metadata_key(pb, 0x014400);

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

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

  725. 

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

  727.     mxf_write_uuid(pb, MultipleDescriptor, 0);

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

  729. 

  730.     // write sample rate

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

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

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

  734. 

  735.     // write essence container ul

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

  737.     if (mxf->essence_container_count > 1)

  738.         ul = multiple_desc_ul;

  739.     else {

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

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

  742.     }

  743.     avio_write(pb, ul, 16);

  744. 

  745.     // write sub descriptor refs

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

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

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

  749.         mxf_write_uuid(pb, SubDescriptor, i);

  750. }

  751. 

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

  753. {

  754.     MXFContext *mxf = s->priv_data;

  755.     MXFStreamContext *sc = st->priv_data;

  756.     AVIOContext *pb = s->pb;

  757. 

  758.     avio_write(pb, key, 16);

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

  760. 

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

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

  763. 

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

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

  766. 

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

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

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

  770. 

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

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

  773. }

  774. 

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

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

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

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

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

  780. 

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

  782. {

  783.     MXFStreamContext *sc = st->priv_data;

  784.     AVIOContext *pb = s->pb;

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

  786.     int display_height;

  787.     int f1, f2;

  788. 

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

  790. 

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

  792.     avio_wb32(pb, st->codecpar->width);

  793. 

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

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

  796. 

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

  798.     avio_wb32(pb, st->codecpar->width);

  799. 

  800.     if (st->codecpar->height == 608) // PAL + VBI

  801.         display_height = 576;

  802.     else if (st->codecpar->height == 512)  // NTSC + VBI

  803.         display_height = 486;

  804.     else

  805.         display_height = st->codecpar->height;

  806. 

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

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

  809. 

  810.     // component depth

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

  812.     avio_wb32(pb, 8);

  813. 

  814.     // horizontal subsampling

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

  816.     avio_wb32(pb, 2);

  817. 

  818.     // frame layout

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

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

  821. 

  822.     // video line map

  823.     switch (st->codecpar->height) {

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

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

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

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

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

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

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

  831.     }

  832. 

  833.     if (!sc->interlaced) {

  834.         f2  = 0;

  835.         f1 *= 2;

  836.     }

  837. 

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

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

  840.     avio_wb32(pb, 4);

  841.     avio_wb32(pb, f1);

  842.     if (sc->interlaced)

  843.         avio_wb32(pb, f2);

  844. 

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

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

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

  848. 

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

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

  851. }

  852. 

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

  854. {

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

  856. }

  857. 

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

  859. {

  860.     AVIOContext *pb = s->pb;

  861.     int profile_and_level = (st->codecpar->profile<<4) | st->codecpar->level;

  862. 

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

  864. 

  865.     // bit rate

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

  867.     avio_wb32(pb, st->codecpar->bit_rate);

  868. 

  869.     // profile and level

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

  871.     if (!st->codecpar->profile)

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

  873.     avio_w8(pb, profile_and_level);

  874. }

  875. 

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

  877. {

  878.     AVIOContext *pb = s->pb;

  879. 

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

  881. 

  882.     // audio locked

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

  884.     avio_w8(pb, 1);

  885. 

  886.     // write audio sampling rate

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

  888.     avio_wb32(pb, st->codecpar->sample_rate);

  889.     avio_wb32(pb, 1);

  890. 

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

  892.     avio_wb32(pb, st->codecpar->channels);

  893. 

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

  895.     avio_wb32(pb, av_get_bits_per_sample(st->codecpar->codec_id));

  896. }

  897. 

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

  899. {

  900.     AVIOContext *pb = s->pb;

  901. 

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

  903. 

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

  905.     avio_wb16(pb, st->codecpar->block_align);

  906. 

  907.     // avg bytes per sec

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

  909.     avio_wb32(pb, st->codecpar->block_align*st->codecpar->sample_rate);

  910. }

  911. 

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

  913. {

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

  915. }

  916. 

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

  918. {

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

  920. }

  921. 

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

  923. {

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

  925. }

  926. 

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

  928. {

  929.     MXFContext *mxf = s->priv_data;

  930.     AVIOContext *pb = s->pb;

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

  932. 

  933.     if (type == MaterialPackage) {

  934.         mxf_write_metadata_key(pb, 0x013600);

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

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

  937.     } else {

  938.         mxf_write_metadata_key(pb, 0x013700);

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

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

  941.     }

  942. 

  943.     // write uid

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

  945.     mxf_write_uuid(pb, type, 0);

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

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

  948. 

  949.     // write package umid

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

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

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

  953. 

  954.     // package creation date

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

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

  957. 

  958.     // package modified date

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

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

  961. 

  962.     // write track refs

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

  964.     mxf_write_refs_count(pb, track_count);

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

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

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

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

  969. 

  970.     // write multiple descriptor reference

  971.     if (type == SourcePackage) {

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

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

  974.             mxf_write_uuid(pb, MultipleDescriptor, 0);

  975.             mxf_write_multi_descriptor(s);

  976.         } else

  977.             mxf_write_uuid(pb, SubDescriptor, 0);

  978.     }

  979. 

  980.     // write timecode track

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

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

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

  984. 

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

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

  987.         mxf_write_track(s, st, type);

  988.         mxf_write_sequence(s, st, type);

  989.         mxf_write_structural_component(s, st, type);

  990. 

  991.         if (type == SourcePackage) {

  992.             MXFStreamContext *sc = st->priv_data;

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

  994.         }

  995.     }

  996. }

  997. 

  998. static int mxf_write_essence_container_data(AVFormatContext *s)

  999. {

  1000.     AVIOContext *pb = s->pb;

  1001. 

  1002.     mxf_write_metadata_key(pb, 0x012300);

  1003.     klv_encode_ber_length(pb, 72);

  1004. 

  1005.     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID

  1006.     mxf_write_uuid(pb, EssenceContainerData, 0);

  1007. 

  1008.     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID

  1009.     mxf_write_umid(s, 1);

  1010. 

  1011.     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID

  1012.     avio_wb32(pb, 1);

  1013. 

  1014.     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID

  1015.     avio_wb32(pb, 2);

  1016. 

  1017.     return 0;

  1018. }

  1019. 

  1020. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  1021. {

  1022.     mxf_write_preface(s);

  1023.     mxf_write_identification(s);

  1024.     mxf_write_content_storage(s);

  1025.     mxf_write_package(s, MaterialPackage);

  1026.     mxf_write_package(s, SourcePackage);

  1027.     mxf_write_essence_container_data(s);

  1028.     return 0;

  1029. }

  1030. 

  1031. static unsigned klv_fill_size(uint64_t size)

  1032. {

  1033.     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));

  1034.     if (pad < 20) // smallest fill item possible

  1035.         return pad + KAG_SIZE;

  1036.     else

  1037.         return pad & (KAG_SIZE-1);

  1038. }

  1039. 

  1040. static void mxf_write_index_table_segment(AVFormatContext *s)

  1041. {

  1042.     MXFContext *mxf = s->priv_data;

  1043.     AVIOContext *pb = s->pb;

  1044.     int i, j, temporal_reordering = 0;

  1045.     int key_index = mxf->last_key_index;

  1046. 

  1047.     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);

  1048. 

  1049.     if (!mxf->edit_units_count && !mxf->edit_unit_byte_count)

  1050.         return;

  1051. 

  1052.     avio_write(pb, index_table_segment_key, 16);

  1053. 

  1054.     if (mxf->edit_unit_byte_count) {

  1055.         klv_encode_ber_length(pb, 80);

  1056.     } else {

  1057.         klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1LL)*6 +

  1058.                               12+mxf->edit_units_count*(11+mxf->slice_count*4LL));

  1059.     }

  1060. 

  1061.     // instance id

  1062.     mxf_write_local_tag(pb, 16, 0x3C0A);

  1063.     mxf_write_uuid(pb, IndexTableSegment, 0);

  1064. 

  1065.     // index edit rate

  1066.     mxf_write_local_tag(pb, 8, 0x3F0B);

  1067.     avio_wb32(pb, mxf->time_base.den);

  1068.     avio_wb32(pb, mxf->time_base.num);

  1069. 

  1070.     // index start position

  1071.     mxf_write_local_tag(pb, 8, 0x3F0C);

  1072.     avio_wb64(pb, mxf->last_indexed_edit_unit);

  1073. 

  1074.     // index duration

  1075.     mxf_write_local_tag(pb, 8, 0x3F0D);

  1076.     if (mxf->edit_unit_byte_count)

  1077.         avio_wb64(pb, 0); // index table covers whole container

  1078.     else

  1079.         avio_wb64(pb, mxf->edit_units_count);

  1080. 

  1081.     // edit unit byte count

  1082.     mxf_write_local_tag(pb, 4, 0x3F05);

  1083.     avio_wb32(pb, mxf->edit_unit_byte_count);

  1084. 

  1085.     // index sid

  1086.     mxf_write_local_tag(pb, 4, 0x3F06);

  1087.     avio_wb32(pb, 2);

  1088. 

  1089.     // body sid

  1090.     mxf_write_local_tag(pb, 4, 0x3F07);

  1091.     avio_wb32(pb, 1);

  1092. 

  1093.     if (!mxf->edit_unit_byte_count) {

  1094.         // real slice count - 1

  1095.         mxf_write_local_tag(pb, 1, 0x3F08);

  1096.         avio_w8(pb, mxf->slice_count);

  1097. 

  1098.         // delta entry array

  1099.         mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);

  1100.         avio_wb32(pb, s->nb_streams+1); // num of entries

  1101.         avio_wb32(pb, 6);               // size of one entry

  1102.         // write system item delta entry

  1103.         avio_w8(pb, 0);

  1104.         avio_w8(pb, 0); // slice entry

  1105.         avio_wb32(pb, 0); // element delta

  1106.         for (i = 0; i < s->nb_streams; i++) {

  1107.             AVStream *st = s->streams[i];

  1108.             MXFStreamContext *sc = st->priv_data;

  1109.             avio_w8(pb, sc->temporal_reordering);

  1110.             if (sc->temporal_reordering)

  1111.                 temporal_reordering = 1;

  1112.             if (i == 0) { // video track

  1113.                 avio_w8(pb, 0); // slice number

  1114.                 avio_wb32(pb, KAG_SIZE); // system item size including klv fill

  1115.             } else { // audio track

  1116.                 unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;

  1117.                 audio_frame_size += klv_fill_size(audio_frame_size);

  1118.                 avio_w8(pb, 1);

  1119.                 avio_wb32(pb, (i-1)*audio_frame_size); // element delta

  1120.             }

  1121.         }

  1122. 

  1123.         mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);

  1124.         avio_wb32(pb, mxf->edit_units_count);  // num of entries

  1125.         avio_wb32(pb, 11+mxf->slice_count*4);  // size of one entry

  1126. 

  1127.         for (i = 0; i < mxf->edit_units_count; i++) {

  1128.             int temporal_offset = 0;

  1129. 

  1130.             if (!(mxf->index_entries[i].flags & 0x33)) { // I-frame

  1131.                 mxf->last_key_index = key_index;

  1132.                 key_index = i;

  1133.             }

  1134. 

  1135.             if (temporal_reordering) {

  1136.                 int pic_num_in_gop = i - key_index;

  1137.                 if (pic_num_in_gop != mxf->index_entries[i].temporal_ref) {

  1138.                     for (j = key_index; j < mxf->edit_units_count; j++) {

  1139.                         if (pic_num_in_gop == mxf->index_entries[j].temporal_ref)

  1140.                             break;

  1141.                     }

  1142.                     if (j == mxf->edit_units_count)

  1143.                         av_log(s, AV_LOG_WARNING, "missing frames\n");

  1144.                     temporal_offset = j - key_index - pic_num_in_gop;

  1145.                 }

  1146.             }

  1147.             avio_w8(pb, temporal_offset);

  1148. 

  1149.             if ((mxf->index_entries[i].flags & 0x30) == 0x30) { // back and forward prediction

  1150.                 avio_w8(pb, mxf->last_key_index - i);

  1151.             } else {

  1152.                 avio_w8(pb, key_index - i); // key frame offset

  1153.                 if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward

  1154.                     mxf->last_key_index = key_index;

  1155.             }

  1156. 

  1157.             if (!(mxf->index_entries[i].flags & 0x33) && // I-frame

  1158.                 mxf->index_entries[i].flags & 0x40 && !temporal_offset)

  1159.                 mxf->index_entries[i].flags |= 0x80; // random access

  1160.             avio_w8(pb, mxf->index_entries[i].flags);

  1161.             // stream offset

  1162.             avio_wb64(pb, mxf->index_entries[i].offset);

  1163.             if (s->nb_streams > 1)

  1164.                 avio_wb32(pb, mxf->index_entries[i].slice_offset);

  1165.         }

  1166. 

  1167.         mxf->last_key_index = key_index - mxf->edit_units_count;

  1168.         mxf->last_indexed_edit_unit += mxf->edit_units_count;

  1169.         mxf->edit_units_count = 0;

  1170.     }

  1171. }

  1172. 

  1173. static void mxf_write_klv_fill(AVFormatContext *s)

  1174. {

  1175.     unsigned pad = klv_fill_size(avio_tell(s->pb));

  1176.     if (pad) {

  1177.         avio_write(s->pb, klv_fill_key, 16);

  1178.         pad -= 16 + 4;

  1179.         klv_encode_ber4_length(s->pb, pad);

  1180.         for (; pad; pad--)

  1181.             avio_w8(s->pb, 0);

  1182.         assert(!(avio_tell(s->pb) & (KAG_SIZE-1)));

  1183.     }

  1184. }

  1185. 

  1186. static int mxf_write_partition(AVFormatContext *s, int bodysid,

  1187.                                 int indexsid,

  1188.                                 const uint8_t *key, int write_metadata)

  1189. {

  1190.     MXFContext *mxf = s->priv_data;

  1191.     AVIOContext *pb = s->pb;

  1192.     int64_t header_byte_count_offset;

  1193.     unsigned index_byte_count = 0;

  1194.     uint64_t partition_offset = avio_tell(pb);

  1195.     int err;

  1196. 

  1197.     if (!mxf->edit_unit_byte_count && mxf->edit_units_count)

  1198.         index_byte_count = 85 + 12+(s->nb_streams+1)*6 +

  1199.             12+mxf->edit_units_count*(11+mxf->slice_count*4);

  1200.     else if (mxf->edit_unit_byte_count && indexsid)

  1201.         index_byte_count = 80;

  1202. 

  1203.     if (index_byte_count) {

  1204.         // add encoded ber length

  1205.         index_byte_count += 16 + klv_ber_length(index_byte_count);

  1206.         index_byte_count += klv_fill_size(index_byte_count);

  1207.     }

  1208. 

  1209.     if (!memcmp(key, body_partition_key, 16)) {

  1210.         if ((err = av_reallocp_array(&mxf->body_partition_offset, mxf->body_partitions_count + 1,

  1211.                                      sizeof(*mxf->body_partition_offset))) < 0) {

  1212.             mxf->body_partitions_count = 0;

  1213.             return err;

  1214.         }

  1215.         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;

  1216.     }

  1217. 

  1218.     // write klv

  1219.     avio_write(pb, key, 16);

  1220.     klv_encode_ber_length(pb, 88 + 16LL * mxf->essence_container_count);

  1221. 

  1222.     // write partition value

  1223.     avio_wb16(pb, 1); // majorVersion

  1224.     avio_wb16(pb, 2); // minorVersion

  1225.     avio_wb32(pb, KAG_SIZE); // KAGSize

  1226. 

  1227.     avio_wb64(pb, partition_offset); // ThisPartition

  1228. 

  1229.     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)

  1230.         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition

  1231.     else if (!memcmp(key, footer_partition_key, 16) && mxf->body_partitions_count)

  1232.         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition

  1233.     else

  1234.         avio_wb64(pb, 0);

  1235. 

  1236.     avio_wb64(pb, mxf->footer_partition_offset); // footerPartition

  1237. 

  1238.     // set offset

  1239.     header_byte_count_offset = avio_tell(pb);

  1240.     avio_wb64(pb, 0); // headerByteCount, update later

  1241. 

  1242.     // indexTable

  1243.     avio_wb64(pb, index_byte_count); // indexByteCount

  1244.     avio_wb32(pb, index_byte_count ? indexsid : 0); // indexSID

  1245. 

  1246.     // BodyOffset

  1247.     if (bodysid && mxf->edit_units_count && mxf->body_partitions_count) {

  1248.         avio_wb64(pb, mxf->body_offset);

  1249.     } else

  1250.         avio_wb64(pb, 0);

  1251. 

  1252.     avio_wb32(pb, bodysid); // bodySID

  1253. 

  1254.     // operational pattern

  1255.     avio_write(pb, op1a_ul, 16);

  1256. 

  1257.     // essence container

  1258.     mxf_write_essence_container_refs(s);

  1259. 

  1260.     if (write_metadata) {

  1261.         // mark the start of the headermetadata and calculate metadata size

  1262.         int64_t pos, start;

  1263.         unsigned header_byte_count;

  1264. 

  1265.         mxf_write_klv_fill(s);

  1266.         start = avio_tell(s->pb);

  1267.         mxf_write_primer_pack(s);

  1268.         mxf_write_header_metadata_sets(s);

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

  1270.         header_byte_count = pos - start + klv_fill_size(pos);

  1271. 

  1272.         // update header_byte_count

  1273.         avio_seek(pb, header_byte_count_offset, SEEK_SET);

  1274.         avio_wb64(pb, header_byte_count);

  1275.         avio_seek(pb, pos, SEEK_SET);

  1276.     }

  1277. 

  1278.     avio_flush(pb);

  1279. 

  1280.     return 0;

  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(AVCodecParameters *par)

  1297. {

  1298.     int long_gop = 1;

  1299. 

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

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

  1302.             return &mxf_mpeg2_codec_uls[0+long_gop];

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

  1304.             return &mxf_mpeg2_codec_uls[4+long_gop];

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

  1306.             return &mxf_mpeg2_codec_uls[8+long_gop];

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

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

  1309.             return &mxf_mpeg2_codec_uls[2+long_gop];

  1310.         else if (par->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.     MXFContext *mxf = s->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->codecpar->profile = pkt->data[i+1] & 0x07;

  1329.                 st->codecpar->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.             if (!mxf->header_written) {

  1341.                 unsigned hours   =  (pkt->data[i+1]>>2) & 0x1f;

  1342.                 unsigned minutes = ((pkt->data[i+1] & 0x03) << 4) | (pkt->data[i+2]>>4);

  1343.                 unsigned seconds = ((pkt->data[i+2] & 0x07) << 3) | (pkt->data[i+3]>>5);

  1344.                 unsigned frames  = ((pkt->data[i+3] & 0x1f) << 1) | (pkt->data[i+4]>>7);

  1345.                 mxf->timecode_drop_frame = !!(pkt->data[i+1] & 0x80);

  1346.                 mxf->timecode_start = (hours*3600 + minutes*60 + seconds) *

  1347.                     mxf->timecode_base + frames;

  1348.                 if (mxf->timecode_drop_frame) {

  1349.                     unsigned tminutes = 60 * hours + minutes;

  1350.                     mxf->timecode_start -= 2 * (tminutes - tminutes / 10);

  1351.                 }

  1352.                 av_log(s, AV_LOG_DEBUG, "frame %d %d:%d:%d%c%d\n", mxf->timecode_start,

  1353.                        hours, minutes, seconds, mxf->timecode_drop_frame ? ';':':', frames);

  1354.             }

  1355.         } else if (c == 0x1b3) { // seq

  1356.             e->flags |= 0x40;

  1357.             switch ((pkt->data[i+4]>>4) & 0xf) {

  1358.             case 2:  sc->aspect_ratio = (AVRational){  4,  3}; break;

  1359.             case 3:  sc->aspect_ratio = (AVRational){ 16,  9}; break;

  1360.             case 4:  sc->aspect_ratio = (AVRational){221,100}; break;

  1361.             default:

  1362.                 av_reduce(&sc->aspect_ratio.num, &sc->aspect_ratio.den,

  1363.                           st->codecpar->width, st->codecpar->height, 1024*1024);

  1364.             }

  1365.         } else if (c == 0x100) { // pic

  1366.             int pict_type = (pkt->data[i+2]>>3) & 0x07;

  1367.             e->temporal_ref = (pkt->data[i+1]<<2) | (pkt->data[i+2]>>6);

  1368.             if (pict_type == 2) { // P-frame

  1369.                 e->flags |= 0x22;

  1370.                 sc->closed_gop = 0; // reset closed GOP, don't matter anymore

  1371.             } else if (pict_type == 3) { // B-frame

  1372.                 if (sc->closed_gop)

  1373.                     e->flags |= 0x13; // only backward prediction

  1374.                 else

  1375.                     e->flags |= 0x33;

  1376.                 sc->temporal_reordering = -1;

  1377.             } else if (!pict_type) {

  1378.                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");

  1379.                 return 0;

  1380.             }

  1381.         }

  1382.     }

  1383.     if (s->oformat != &ff_mxf_d10_muxer)

  1384.         sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codecpar);

  1385.     return !!sc->codec_ul;

  1386. }

  1387. 

  1388. static uint64_t mxf_parse_timestamp(time_t timestamp)

  1389. {

  1390.     struct tm tmbuf;

  1391.     struct tm *time = gmtime_r(&timestamp, &tmbuf);

  1392.     if (!time)

  1393.         return 0;

  1394.     return (uint64_t)(time->tm_year+1900) << 48 |

  1395.            (uint64_t)(time->tm_mon+1)     << 40 |

  1396.            (uint64_t) time->tm_mday       << 32 |

  1397.                       time->tm_hour       << 24 |

  1398.                       time->tm_min        << 16 |

  1399.                       time->tm_sec        << 8;

  1400. }

  1401. 

  1402. static void mxf_gen_umid(AVFormatContext *s)

  1403. {

  1404.     MXFContext *mxf = s->priv_data;

  1405.     uint32_t seed = av_get_random_seed();

  1406.     uint64_t umid = seed + 0x5294713400000000LL;

  1407. 

  1408.     AV_WB64(mxf->umid  , umid);

  1409.     AV_WB64(mxf->umid+8, umid>>8);

  1410. 

  1411.     mxf->instance_number = seed;

  1412. }

  1413. 

  1414. static int mxf_write_header(AVFormatContext *s)

  1415. {

  1416.     MXFContext *mxf = s->priv_data;

  1417.     int i;

  1418.     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};

  1419.     const int *samples_per_frame = NULL;

  1420.     AVDictionaryEntry *t;

  1421.     int64_t timestamp = 0;

  1422. 

  1423.     if (!s->nb_streams)

  1424.         return -1;

  1425. 

  1426.     for (i = 0; i < s->nb_streams; i++) {

  1427.         AVStream *st = s->streams[i];

  1428.         MXFStreamContext *sc = av_mallocz(sizeof(*sc));

  1429.         if (!sc)

  1430.             return AVERROR(ENOMEM);

  1431.         st->priv_data = sc;

  1432. 

  1433.         if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {

  1434.             if (i != 0) {

  1435.                 av_log(s, AV_LOG_ERROR, "video stream must be first track\n");

  1436.                 return -1;

  1437.             }

  1438.             // TODO: should be avg_frame_rate

  1439.             if (fabs(av_q2d(st->time_base) - 1/25.0) < 0.0001) {

  1440.                 samples_per_frame = PAL_samples_per_frame;

  1441.                 mxf->time_base = (AVRational){ 1, 25 };

  1442.                 mxf->timecode_base = 25;

  1443.             } else if (fabs(av_q2d(st->time_base) - 1001/30000.0) < 0.0001) {

  1444.                 samples_per_frame = NTSC_samples_per_frame;

  1445.                 mxf->time_base = (AVRational){ 1001, 30000 };

  1446.                 mxf->timecode_base = 30;

  1447.             } else {

  1448.                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");

  1449.                 return -1;

  1450.             }

  1451.             avpriv_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);

  1452.             if (s->oformat == &ff_mxf_d10_muxer) {

  1453.                 if (st->codecpar->bit_rate == 50000000)

  1454.                     if (mxf->time_base.den == 25) sc->index = 3;

  1455.                     else                          sc->index = 5;

  1456.                 else if (st->codecpar->bit_rate == 40000000)

  1457.                     if (mxf->time_base.den == 25) sc->index = 7;

  1458.                     else                          sc->index = 9;

  1459.                 else if (st->codecpar->bit_rate == 30000000)

  1460.                     if (mxf->time_base.den == 25) sc->index = 11;

  1461.                     else                          sc->index = 13;

  1462.                 else {

  1463.                     av_log(s, AV_LOG_ERROR, "error MXF D-10 only support 30/40/50 mbit/s\n");

  1464.                     return -1;

  1465.                 }

  1466. 

  1467.                 mxf->edit_unit_byte_count = KAG_SIZE; // system element

  1468.                 mxf->edit_unit_byte_count += 16 + 4 + (uint64_t)st->codecpar->bit_rate *

  1469.                     mxf->time_base.num / (8*mxf->time_base.den);

  1470.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1471.                 mxf->edit_unit_byte_count += 16 + 4 + 4 + samples_per_frame[0]*8*4;

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

  1473.             }

  1474.         } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {

  1475.             if (st->codecpar->sample_rate != 48000) {

  1476.                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");

  1477.                 return -1;

  1478.             }

  1479.             avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);

  1480.             if (s->oformat == &ff_mxf_d10_muxer) {

  1481.                 if (st->index != 1) {

  1482.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support one audio track\n");

  1483.                     return -1;

  1484.                 }

  1485.                 if (st->codecpar->codec_id != AV_CODEC_ID_PCM_S16LE &&

  1486.                     st->codecpar->codec_id != AV_CODEC_ID_PCM_S24LE) {

  1487.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support 16 or 24 bits le audio\n");

  1488.                 }

  1489.                 sc->index = ((MXFStreamContext*)s->streams[0]->priv_data)->index + 1;

  1490.             } else

  1491.             mxf->slice_count = 1;

  1492.         }

  1493. 

  1494.         if (!sc->index) {

  1495.             sc->index = mxf_get_essence_container_ul_index(st->codecpar->codec_id);

  1496.             if (sc->index == -1) {

  1497.                 av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "

  1498.                        "codec not currently supported in container\n", i);

  1499.                 return -1;

  1500.             }

  1501.         }

  1502. 

  1503.         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;

  1504. 

  1505.         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);

  1506.         sc->track_essence_element_key[15] = present[sc->index];

  1507.         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);

  1508. 

  1509.         if (!present[sc->index])

  1510.             mxf->essence_container_count++;

  1511.         present[sc->index]++;

  1512.     }

  1513. 

  1514.     if (s->oformat == &ff_mxf_d10_muxer) {

  1515.         mxf->essence_container_count = 1;

  1516.     }

  1517. 

  1518.     if (!(s->flags & AVFMT_FLAG_BITEXACT))

  1519.         mxf_gen_umid(s);

  1520. 

  1521.     for (i = 0; i < s->nb_streams; i++) {

  1522.         MXFStreamContext *sc = s->streams[i]->priv_data;

  1523.         // update element count

  1524.         sc->track_essence_element_key[13] = present[sc->index];

  1525.         sc->order = AV_RB32(sc->track_essence_element_key+12);

  1526.     }

  1527. 

  1528.     if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))

  1529.         timestamp = ff_iso8601_to_unix_time(t->value);

  1530.     if (timestamp)

  1531.         mxf->timestamp = mxf_parse_timestamp(timestamp);

  1532.     mxf->duration = -1;

  1533. 

  1534.     mxf->timecode_track = av_mallocz(sizeof(*mxf->timecode_track));

  1535.     if (!mxf->timecode_track)

  1536.         return AVERROR(ENOMEM);

  1537.     mxf->timecode_track->priv_data = av_mallocz(sizeof(MXFStreamContext));

  1538.     if (!mxf->timecode_track->priv_data)

  1539.         return AVERROR(ENOMEM);

  1540.     mxf->timecode_track->index = -1;

  1541. 

  1542.     if (!samples_per_frame)

  1543.         samples_per_frame = PAL_samples_per_frame;

  1544. 

  1545.     if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)

  1546.         return -1;

  1547. 

  1548.     return 0;

  1549. }

  1550. 

  1551. static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };

  1552. 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 };

  1553. 

  1554. static uint32_t framenum_to_12m_time_code(unsigned frame, int drop, int fps)

  1555. {

  1556.     return (0                                    << 31) | // color frame flag

  1557.            (drop                                 << 30) | // drop  frame flag

  1558.            ( ((frame % fps) / 10)                << 28) | // tens  of frames

  1559.            ( ((frame % fps) % 10)                << 24) | // units of frames

  1560.            (0                                    << 23) | // field phase (NTSC), b0 (PAL)

  1561.            ((((frame / fps) % 60) / 10)          << 20) | // tens  of seconds

  1562.            ((((frame / fps) % 60) % 10)          << 16) | // units of seconds

  1563.            (0                                    << 15) | // b0 (NTSC), b2 (PAL)

  1564.            ((((frame / (fps * 60)) % 60) / 10)   << 12) | // tens  of minutes

  1565.            ((((frame / (fps * 60)) % 60) % 10)   <<  8) | // units of minutes

  1566.            (0                                    <<  7) | // b1

  1567.            (0                                    <<  6) | // b2 (NTSC), field phase (PAL)

  1568.            ((((frame / (fps * 3600) % 24)) / 10) <<  4) | // tens  of hours

  1569.            (  (frame / (fps * 3600) % 24)) % 10;          // units of hours

  1570. }

  1571. 

  1572. static void mxf_write_system_item(AVFormatContext *s)

  1573. {

  1574.     MXFContext *mxf = s->priv_data;

  1575.     AVIOContext *pb = s->pb;

  1576.     unsigned frame;

  1577.     uint32_t time_code;

  1578. 

  1579.     frame = mxf->timecode_start + mxf->last_indexed_edit_unit + mxf->edit_units_count;

  1580. 

  1581.     // write system metadata pack

  1582.     avio_write(pb, system_metadata_pack_key, 16);

  1583.     klv_encode_ber4_length(pb, 57);

  1584.     avio_w8(pb, 0x5c); // UL, user date/time stamp, picture and sound item present

  1585.     avio_w8(pb, 0x04); // content package rate

  1586.     avio_w8(pb, 0x00); // content package type

  1587.     avio_wb16(pb, 0x00); // channel handle

  1588.     avio_wb16(pb, frame); // continuity count

  1589.     if (mxf->essence_container_count > 1)

  1590.         avio_write(pb, multiple_desc_ul, 16);

  1591.     else {

  1592.         MXFStreamContext *sc = s->streams[0]->priv_data;

  1593.         avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);

  1594.     }

  1595.     avio_w8(pb, 0);

  1596.     avio_wb64(pb, 0);

  1597.     avio_wb64(pb, 0); // creation date/time stamp

  1598. 

  1599.     avio_w8(pb, 0x81); // SMPTE 12M time code

  1600.     time_code = framenum_to_12m_time_code(frame, mxf->timecode_drop_frame,

  1601.                                           mxf->timecode_base);

  1602.     avio_wb32(pb, time_code);

  1603.     avio_wb32(pb, 0); // binary group data

  1604.     avio_wb64(pb, 0);

  1605. 

  1606.     // write system metadata package set

  1607.     avio_write(pb, system_metadata_package_set_key, 16);

  1608.     klv_encode_ber4_length(pb, 35);

  1609.     avio_w8(pb, 0x83); // UMID

  1610.     avio_wb16(pb, 0x20);

  1611.     mxf_write_umid(s, 1);

  1612. }

  1613. 

  1614. static void mxf_write_d10_video_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1615. {

  1616.     MXFContext *mxf = s->priv_data;

  1617.     AVIOContext *pb = s->pb;

  1618.     int packet_size = (uint64_t)st->codecpar->bit_rate*mxf->time_base.num /

  1619.         (8*mxf->time_base.den); // frame size

  1620.     int pad;

  1621. 

  1622.     packet_size += 16 + 4;

  1623.     packet_size += klv_fill_size(packet_size);

  1624. 

  1625.     klv_encode_ber4_length(pb, pkt->size);

  1626.     avio_write(pb, pkt->data, pkt->size);

  1627. 

  1628.     // ensure CBR muxing by padding to correct video frame size

  1629.     pad = packet_size - pkt->size - 16 - 4;

  1630.     if (pad > 20) {

  1631.         avio_write(s->pb, klv_fill_key, 16);

  1632.         pad -= 16 + 4;

  1633.         klv_encode_ber4_length(s->pb, pad);

  1634.         for (; pad; pad--)

  1635.             avio_w8(s->pb, 0);

  1636.         assert(!(avio_tell(s->pb) & (KAG_SIZE-1)));

  1637.     } else {

  1638.         av_log(s, AV_LOG_WARNING, "cannot fill d-10 video packet\n");

  1639.         for (; pad > 0; pad--)

  1640.             avio_w8(s->pb, 0);

  1641.     }

  1642. }

  1643. 

  1644. static void mxf_write_d10_audio_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1645. {

  1646.     MXFContext *mxf = s->priv_data;

  1647.     AVIOContext *pb = s->pb;

  1648.     int frame_size = pkt->size / st->codecpar->block_align;

  1649.     uint8_t *samples = pkt->data;

  1650.     uint8_t *end = pkt->data + pkt->size;

  1651.     int i;

  1652. 

  1653.     klv_encode_ber4_length(pb, 4 + frame_size*4*8);

  1654. 

  1655.     avio_w8(pb, (frame_size == 1920 ? 0 : (mxf->edit_units_count-1) % 5 + 1));

  1656.     avio_wl16(pb, frame_size);

  1657.     avio_w8(pb, (1<<st->codecpar->channels)-1);

  1658. 

  1659.     while (samples < end) {

  1660.         for (i = 0; i < st->codecpar->channels; i++) {

  1661.             uint32_t sample;

  1662.             if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S24LE) {

  1663.                 sample = AV_RL24(samples)<< 4;

  1664.                 samples += 3;

  1665.             } else {

  1666.                 sample = AV_RL16(samples)<<12;

  1667.                 samples += 2;

  1668.             }

  1669.             avio_wl32(pb, sample | i);

  1670.         }

  1671.         for (; i < 8; i++)

  1672.             avio_wl32(pb, i);

  1673.     }

  1674. }

  1675. 

  1676. static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)

  1677. {

  1678.     MXFContext *mxf = s->priv_data;

  1679.     AVIOContext *pb = s->pb;

  1680.     AVStream *st = s->streams[pkt->stream_index];

  1681.     MXFStreamContext *sc = st->priv_data;

  1682.     MXFIndexEntry ie = {0};

  1683.     int err;

  1684. 

  1685.     if (!mxf->edit_unit_byte_count && !(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {

  1686.         if ((err = av_reallocp_array(&mxf->index_entries, mxf->edit_units_count

  1687.                                      + EDIT_UNITS_PER_BODY, sizeof(*mxf->index_entries))) < 0) {

  1688.             mxf->edit_units_count = 0;

  1689.             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");

  1690.             return err;

  1691.         }

  1692.     }

  1693. 

  1694.     if (st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO) {

  1695.         if (!mxf_parse_mpeg2_frame(s, st, pkt, &ie)) {

  1696.             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");

  1697.             return -1;

  1698.         }

  1699.     }

  1700. 

  1701.     if (!mxf->header_written) {

  1702.         if (mxf->edit_unit_byte_count) {

  1703.             if ((err = mxf_write_partition(s, 1, 2, header_open_partition_key, 1)) < 0)

  1704.                 return err;

  1705.             mxf_write_klv_fill(s);

  1706.             mxf_write_index_table_segment(s);

  1707.         } else {

  1708.             if ((err = mxf_write_partition(s, 0, 0, header_open_partition_key, 1)) < 0)

  1709.                 return err;

  1710.         }

  1711.         mxf->header_written = 1;

  1712.     }

  1713. 

  1714.     if (st->index == 0) {

  1715.         if (!mxf->edit_unit_byte_count &&

  1716.             (!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&

  1717.             !(ie.flags & 0x33)) { // I-frame, GOP start

  1718.             mxf_write_klv_fill(s);

  1719.             if ((err = mxf_write_partition(s, 1, 2, body_partition_key, 0)) < 0)

  1720.                 return err;

  1721.             mxf_write_klv_fill(s);

  1722.             mxf_write_index_table_segment(s);

  1723.         }

  1724. 

  1725.         mxf_write_klv_fill(s);

  1726.         mxf_write_system_item(s);

  1727. 

  1728.         if (!mxf->edit_unit_byte_count) {

  1729.             mxf->index_entries[mxf->edit_units_count].offset = mxf->body_offset;

  1730.             mxf->index_entries[mxf->edit_units_count].flags = ie.flags;

  1731.             mxf->index_entries[mxf->edit_units_count].temporal_ref = ie.temporal_ref;

  1732.             mxf->body_offset += KAG_SIZE; // size of system element

  1733.         }

  1734.         mxf->edit_units_count++;

  1735.     } else if (!mxf->edit_unit_byte_count && st->index == 1) {

  1736.         mxf->index_entries[mxf->edit_units_count-1].slice_offset =

  1737.             mxf->body_offset - mxf->index_entries[mxf->edit_units_count-1].offset;

  1738.     }

  1739. 

  1740.     mxf_write_klv_fill(s);

  1741.     avio_write(pb, sc->track_essence_element_key, 16); // write key

  1742.     if (s->oformat == &ff_mxf_d10_muxer) {

  1743.         if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)

  1744.             mxf_write_d10_video_packet(s, st, pkt);

  1745.         else

  1746.             mxf_write_d10_audio_packet(s, st, pkt);

  1747.     } else {

  1748.         klv_encode_ber4_length(pb, pkt->size); // write length

  1749.         avio_write(pb, pkt->data, pkt->size);

  1750.         mxf->body_offset += 16+4+pkt->size + klv_fill_size(16+4+pkt->size);

  1751.     }

  1752. 

  1753.     avio_flush(pb);

  1754. 

  1755.     return 0;

  1756. }

  1757. 

  1758. static void mxf_write_random_index_pack(AVFormatContext *s)

  1759. {

  1760.     MXFContext *mxf = s->priv_data;

  1761.     AVIOContext *pb = s->pb;

  1762.     uint64_t pos = avio_tell(pb);

  1763.     int i;

  1764. 

  1765.     avio_write(pb, random_index_pack_key, 16);

  1766.     klv_encode_ber_length(pb, 28 + 12LL*mxf->body_partitions_count);

  1767. 

  1768.     if (mxf->edit_unit_byte_count)

  1769.         avio_wb32(pb, 1); // BodySID of header partition

  1770.     else

  1771.         avio_wb32(pb, 0);

  1772.     avio_wb64(pb, 0); // offset of header partition

  1773. 

  1774.     for (i = 0; i < mxf->body_partitions_count; i++) {

  1775.         avio_wb32(pb, 1); // BodySID

  1776.         avio_wb64(pb, mxf->body_partition_offset[i]);

  1777.     }

  1778. 

  1779.     avio_wb32(pb, 0); // BodySID of footer partition

  1780.     avio_wb64(pb, mxf->footer_partition_offset);

  1781. 

  1782.     avio_wb32(pb, avio_tell(pb) - pos + 4);

  1783. }

  1784. 

  1785. static int mxf_write_footer(AVFormatContext *s)

  1786. {

  1787.     MXFContext *mxf = s->priv_data;

  1788.     AVIOContext *pb = s->pb;

  1789.     int err;

  1790. 

  1791.     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  1792. 

  1793.     mxf_write_klv_fill(s);

  1794.     mxf->footer_partition_offset = avio_tell(pb);

  1795.     if (mxf->edit_unit_byte_count) { // no need to repeat index

  1796.         if ((err = mxf_write_partition(s, 0, 0, footer_partition_key, 0)) < 0)

  1797.             return err;

  1798.     } else {

  1799.         if ((err = mxf_write_partition(s, 0, 2, footer_partition_key, 0)) < 0)

  1800.             return err;

  1801.         mxf_write_klv_fill(s);

  1802.         mxf_write_index_table_segment(s);

  1803.     }

  1804. 

  1805.     mxf_write_klv_fill(s);

  1806.     mxf_write_random_index_pack(s);

  1807. 

  1808.     if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {

  1809.         avio_seek(pb, 0, SEEK_SET);

  1810.         if (mxf->edit_unit_byte_count) {

  1811.             if ((err = mxf_write_partition(s, 1, 2, header_closed_partition_key, 1)) < 0)

  1812.                 return err;

  1813.             mxf_write_klv_fill(s);

  1814.             mxf_write_index_table_segment(s);

  1815.         } else {

  1816.             if ((err = mxf_write_partition(s, 0, 0, header_closed_partition_key, 1)) < 0)

  1817.                 return err;

  1818.         }

  1819.     }

  1820. 

  1821.     ff_audio_interleave_close(s);

  1822. 

  1823.     av_freep(&mxf->index_entries);

  1824.     av_freep(&mxf->body_partition_offset);

  1825.     av_freep(&mxf->timecode_track->priv_data);

  1826.     av_freep(&mxf->timecode_track);

  1827. 

  1828.     mxf_free(s);

  1829. 

  1830.     return 0;

  1831. }

  1832. 

  1833. static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  1834. {

  1835.     int i, stream_count = 0;

  1836. 

  1837.     for (i = 0; i < s->nb_streams; i++)

  1838.         stream_count += !!s->streams[i]->last_in_packet_buffer;

  1839. 

  1840.     if (stream_count && (s->nb_streams == stream_count || flush)) {

  1841.         AVPacketList *pktl = s->internal->packet_buffer;

  1842.         if (s->nb_streams != stream_count) {

  1843.             AVPacketList *last = NULL;

  1844.             // find last packet in edit unit

  1845.             while (pktl) {

  1846.                 if (!stream_count || pktl->pkt.stream_index == 0)

  1847.                     break;

  1848.                 last = pktl;

  1849.                 pktl = pktl->next;

  1850.                 stream_count--;

  1851.             }

  1852.             // purge packet queue

  1853.             while (pktl) {

  1854.                 AVPacketList *next = pktl->next;

  1855. 

  1856.                 if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)

  1857.                     s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;

  1858.                 av_packet_unref(&pktl->pkt);

  1859.                 av_freep(&pktl);

  1860.                 pktl = next;

  1861.             }

  1862.             if (last)

  1863.                 last->next = NULL;

  1864.             else {

  1865.                 s->internal->packet_buffer = NULL;

  1866.                 s->internal->packet_buffer_end= NULL;

  1867.                 goto out;

  1868.             }

  1869.             pktl = s->internal->packet_buffer;

  1870.         }

  1871. 

  1872.         *out = pktl->pkt;

  1873.         av_log(s, AV_LOG_TRACE, "out st:%d dts:%"PRId64"\n", (*out).stream_index, (*out).dts);

  1874.         s->internal->packet_buffer = pktl->next;

  1875.         if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)

  1876.             s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;

  1877.         if(!s->internal->packet_buffer)

  1878.             s->internal->packet_buffer_end= NULL;

  1879.         av_freep(&pktl);

  1880.         return 1;

  1881.     } else {

  1882.     out:

  1883.         av_init_packet(out);

  1884.         return 0;

  1885.     }

  1886. }

  1887. 

  1888. static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)

  1889. {

  1890.     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;

  1891.     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;

  1892. 

  1893.     return next->dts > pkt->dts ||

  1894.         (next->dts == pkt->dts && sc->order < sc2->order);

  1895. }

  1896. 

  1897. static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  1898. {

  1899.     return ff_audio_rechunk_interleave(s, out, pkt, flush,

  1900.                                mxf_interleave_get_packet, mxf_compare_timestamps);

  1901. }

  1902. 

  1903. AVOutputFormat ff_mxf_muxer = {

  1904.     .name              = "mxf",

  1905.     .long_name         = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),

  1906.     .mime_type         = "application/mxf",

  1907.     .extensions        = "mxf",

  1908.     .priv_data_size    = sizeof(MXFContext),

  1909.     .audio_codec       = AV_CODEC_ID_PCM_S16LE,

  1910.     .video_codec       = AV_CODEC_ID_MPEG2VIDEO,

  1911.     .write_header      = mxf_write_header,

  1912.     .write_packet      = mxf_write_packet,

  1913.     .write_trailer     = mxf_write_footer,

  1914.     .flags             = AVFMT_NOTIMESTAMPS,

  1915.     .interleave_packet = mxf_interleave,

  1916. };

  1917. 

  1918. AVOutputFormat ff_mxf_d10_muxer = {

  1919.     .name              = "mxf_d10",

  1920.     .long_name         = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format) D-10 Mapping"),

  1921.     .mime_type         = "application/mxf",

  1922.     .priv_data_size    = sizeof(MXFContext),

  1923.     .audio_codec       = AV_CODEC_ID_PCM_S16LE,

  1924.     .video_codec       = AV_CODEC_ID_MPEG2VIDEO,

  1925.     .write_header      = mxf_write_header,

  1926.     .write_packet      = mxf_write_packet,

  1927.     .write_trailer     = mxf_write_footer,

  1928.     .flags             = AVFMT_NOTIMESTAMPS,

  1929.     .interleave_packet = mxf_interleave,

  1930. };