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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. #include <inttypes.h>

  34. #include <math.h>

  35. #include <time.h>

  36. 

  37. #include "libavutil/opt.h"

  38. #include "libavutil/random_seed.h"

  39. #include "libavutil/timecode.h"

  40. #include "libavutil/avassert.h"

  41. #include "libavcodec/bytestream.h"

  42. #include "libavcodec/dnxhddata.h"

  43. #include "audiointerleave.h"

  44. #include "avformat.h"

  45. #include "avio_internal.h"

  46. #include "internal.h"

  47. #include "mxf.h"

  48. #include "config.h"

  49. 

  50. extern AVOutputFormat ff_mxf_d10_muxer;

  51. 

  52. #define EDIT_UNITS_PER_BODY 250

  53. #define KAG_SIZE 512

  54. 

  55. typedef struct {

  56.     int local_tag;

  57.     UID uid;

  58. } MXFLocalTagPair;

  59. 

  60. typedef struct {

  61.     uint8_t flags;

  62.     uint64_t offset;

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

  64.     uint16_t temporal_ref;

  65. } MXFIndexEntry;

  66. 

  67. typedef struct {

  68.     AudioInterleaveContext aic;

  69.     UID track_essence_element_key;

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

  71.     const UID *codec_ul;

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

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

  74.     int field_dominance;     ///< tff=1, bff=2

  75.     int component_depth;

  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 AVCodecID id;

  90.     int index;

  91. } mxf_essence_mappings[] = {

  92.     { AV_CODEC_ID_MPEG2VIDEO, 0 },

  93.     { AV_CODEC_ID_PCM_S24LE,  1 },

  94.     { AV_CODEC_ID_PCM_S16LE,  1 },

  95.     { AV_CODEC_ID_DVVIDEO,   15 },

  96.     { AV_CODEC_ID_DNXHD,     24 },

  97.     { AV_CODEC_ID_NONE }

  98. };

  99. 

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

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

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

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

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

  105. 

  106. static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {

  107.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },

  108.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

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

  110.       mxf_write_mpegvideo_desc },

  111.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },

  112.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },

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

  114.       mxf_write_aes3_desc },

  115.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },

  116.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },

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

  118.       mxf_write_wav_desc },

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

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

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

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

  123.       mxf_write_cdci_desc },

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

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

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

  127.       mxf_write_generic_sound_desc },

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

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

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

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

  132.       mxf_write_cdci_desc },

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

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

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

  136.       mxf_write_generic_sound_desc },

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

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

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

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

  141.       mxf_write_cdci_desc },

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

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

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

  145.       mxf_write_generic_sound_desc },

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

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

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

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

  150.       mxf_write_cdci_desc },

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

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

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

  154.       mxf_write_generic_sound_desc },

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

  156.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },

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

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

  159.       mxf_write_cdci_desc },

  160.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },

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

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

  163.       mxf_write_generic_sound_desc },

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

  165.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },

  166.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  168.       mxf_write_cdci_desc },

  169.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },

  170.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  171.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  172.       mxf_write_generic_sound_desc },

  173.     // DV Unknown

  174.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x7F,0x01 },

  175.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  176.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x00,0x00,0x00 },

  177.       mxf_write_cdci_desc },

  178.     // DV25 525/60

  179.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x40,0x01 },

  180.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  181.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x01,0x00 },

  182.       mxf_write_cdci_desc },

  183.     // DV25 625/50

  184.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 },

  185.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  186.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x02,0x00 },

  187.       mxf_write_cdci_desc },

  188.     // DV50 525/60

  189.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x50,0x01 },

  190.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  191.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x03,0x00 },

  192.       mxf_write_cdci_desc },

  193.     // DV50 625/50

  194.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x51,0x01 },

  195.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  196.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x04,0x00 },

  197.       mxf_write_cdci_desc },

  198.     // DV100 1080/60

  199.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x60,0x01 },

  200.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  201.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x05,0x00 },

  202.       mxf_write_cdci_desc },

  203.     // DV100 1080/50

  204.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x61,0x01 },

  205.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  206.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x06,0x00 },

  207.       mxf_write_cdci_desc },

  208.     // DV100 720/60

  209.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x62,0x01 },

  210.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  211.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x07,0x00 },

  212.       mxf_write_cdci_desc },

  213.     // DV100 720/50

  214.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x63,0x01 },

  215.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  216.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x08,0x00 },

  217.       mxf_write_cdci_desc },

  218.     // DNxHD 1080p 10bit high

  219.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  220.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  221.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x01,0x00,0x00 },

  222.       mxf_write_cdci_desc },

  223.     // DNxHD 1080p 8bit medium

  224.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  225.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  226.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x03,0x00,0x00 },

  227.       mxf_write_cdci_desc },

  228.     // DNxHD 1080p 8bit high

  229.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  230.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  231.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x04,0x00,0x00 },

  232.       mxf_write_cdci_desc },

  233.     // DNxHD 1080i 10bit high

  234.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  235.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  236.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x07,0x00,0x00 },

  237.       mxf_write_cdci_desc },

  238.     // DNxHD 1080i 8bit medium

  239.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  240.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  241.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x08,0x00,0x00 },

  242.       mxf_write_cdci_desc },

  243.     // DNxHD 1080i 8bit high

  244.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  245.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  246.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x09,0x00,0x00 },

  247.       mxf_write_cdci_desc },

  248.     // DNxHD 720p 10bit

  249.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  250.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  251.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x10,0x00,0x00 },

  252.       mxf_write_cdci_desc },

  253.     // DNxHD 720p 8bit high

  254.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  255.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  256.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x11,0x00,0x00 },

  257.       mxf_write_cdci_desc },

  258.     // DNxHD 720p 8bit medium

  259.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  260.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  261.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x12,0x00,0x00 },

  262.       mxf_write_cdci_desc },

  263.     // DNxHD 720p 8bit low

  264.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  265.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  266.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x13,0x00,0x00 },

  267.       mxf_write_cdci_desc },

  268.     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  269.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  270.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  271.       NULL },

  272. };

  273. 

  274. typedef struct MXFContext {

  275.     AVClass *av_class;

  276.     int64_t footer_partition_offset;

  277.     int essence_container_count;

  278.     AVRational time_base;

  279.     int header_written;

  280.     MXFIndexEntry *index_entries;

  281.     unsigned edit_units_count;

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

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

  284.     int last_indexed_edit_unit;

  285.     uint64_t *body_partition_offset;

  286.     unsigned body_partitions_count;

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

  288.     uint64_t duration;

  289.     AVTimecode tc;       ///< timecode context

  290.     AVStream *timecode_track;

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

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

  293.     uint64_t body_offset;

  294.     uint32_t instance_number;

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

  296. } MXFContext;

  297. 

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

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

  300. 

  301. /**

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

  303.  */

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

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

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

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

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

  309. 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

  310. 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

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

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

  313. 

  314. /**

  315.  * partial key for header metadata

  316.  */

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

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

  319. 

  320. /**

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

  322.  */

  323. static const MXFLocalTagPair mxf_local_tag_batch[] = {

  324.     // preface set

  325.     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */

  326.     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */

  327.     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */

  328.     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */

  329.     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */

  330.     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */

  331.     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */

  332.     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */

  333.     // Identification

  334.     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */

  335.     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */

  336.     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */

  337.     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */

  338.     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */

  339.     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */

  340.     // Content Storage

  341.     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */

  342.     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */

  343.     // Essence Container Data

  344.     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */

  345.     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */

  346.     // Package

  347.     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */

  348.     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */

  349.     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */

  350.     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */

  351.     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */

  352.     // Track

  353.     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */

  354.     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */

  355.     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */

  356.     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */

  357.     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */

  358.     // Sequence

  359.     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */

  360.     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */

  361.     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */

  362.     // Source Clip

  363.     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */

  364.     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */

  365.     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */

  366.     // Timecode Component

  367.     { 0x1501, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x05,0x00,0x00}}, /* Start Time Code */

  368.     { 0x1502, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x04,0x01,0x01,0x02,0x06,0x00,0x00}}, /* Rounded Time Code Base */

  369.     { 0x1503, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x04,0x01,0x01,0x05,0x00,0x00,0x00}}, /* Drop Frame */

  370.     // File Descriptor

  371.     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */

  372.     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */

  373.     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */

  374.     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */

  375.     // Generic Picture Essence Descriptor

  376.     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */

  377.     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */

  378.     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */

  379.     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */

  380.     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */

  381.     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */

  382.     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */

  383.     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */

  384.     { 0x3212, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x01,0x06,0x00,0x00,0x00}}, /* Field Dominance (Opt) */

  385.     // CDCI Picture Essence Descriptor

  386.     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */

  387.     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */

  388.     // Generic Sound Essence Descriptor

  389.     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */

  390.     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */

  391.     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */

  392.     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */

  393.     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */

  394.     // Index Table Segment

  395.     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */

  396.     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */

  397.     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */

  398.     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */

  399.     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */

  400.     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */

  401.     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */

  402.     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */

  403.     // MPEG video Descriptor

  404.     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */

  405.     { 0x8007, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0A,0x00,0x00}}, /* ProfileAndLevel */

  406.     // Wave Audio Essence Descriptor

  407.     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */

  408.     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */

  409. };

  410. 

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

  412. {

  413.     avio_write(pb, uuid_base, 12);

  414.     avio_wb16(pb, type);

  415.     avio_wb16(pb, value);

  416. }

  417. 

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

  419. {

  420.     MXFContext *mxf = s->priv_data;

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

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

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

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

  425. }

  426. 

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

  428. {

  429.     avio_wb32(pb, ref_count);

  430.     avio_wb32(pb, 16);

  431. }

  432. 

  433. static int klv_ber_length(uint64_t len)

  434. {

  435.     if (len < 128)

  436.         return 1;

  437.     else

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

  439. }

  440. 

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

  442. {

  443.     // Determine the best BER size

  444.     int size;

  445.     if (len < 128) {

  446.         //short form

  447.         avio_w8(pb, len);

  448.         return 1;

  449.     }

  450. 

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

  452. 

  453.     // long form

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

  455.     while(size) {

  456.         size--;

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

  458.     }

  459.     return 0;

  460. }

  461. 

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

  463. {

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

  465.     avio_wb24(pb, len);

  466. }

  467. 

  468. /*

  469.  * Get essence container ul index

  470.  */

  471. static int mxf_get_essence_container_ul_index(enum AVCodecID id)

  472. {

  473.     int i;

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

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

  476.             return mxf_essence_mappings[i].index;

  477.     return -1;

  478. }

  479. 

  480. static void mxf_write_primer_pack(AVFormatContext *s)

  481. {

  482.     AVIOContext *pb = s->pb;

  483.     int local_tag_number, i = 0;

  484. 

  485.     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);

  486. 

  487.     avio_write(pb, primer_pack_key, 16);

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

  489. 

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

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

  492. 

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

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

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

  496.     }

  497. }

  498. 

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

  500. {

  501.     avio_wb16(pb, tag);

  502.     avio_wb16(pb, size);

  503. }

  504. 

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

  506. {

  507.     avio_write(pb, header_metadata_key, 13);

  508.     avio_wb24(pb, value);

  509. }

  510. 

  511. static void mxf_free(AVFormatContext *s)

  512. {

  513.     int i;

  514. 

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

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

  517.         av_freep(&st->priv_data);

  518.     }

  519. }

  520. 

  521. static const MXFCodecUL *mxf_get_data_definition_ul(int type)

  522. {

  523.     const MXFCodecUL *uls = ff_mxf_data_definition_uls;

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

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

  526.             break;

  527.         uls++;

  528.     }

  529.     return uls;

  530. }

  531. 

  532. //one EC -> one descriptor. N ECs -> MultipleDescriptor + N descriptors

  533. #define DESCRIPTOR_COUNT(essence_container_count) \

  534.     (essence_container_count > 1 ? essence_container_count + 1 : essence_container_count)

  535. 

  536. static void mxf_write_essence_container_refs(AVFormatContext *s)

  537. {

  538.     MXFContext *c = s->priv_data;

  539.     AVIOContext *pb = s->pb;

  540.     int i;

  541. 

  542.     mxf_write_refs_count(pb, DESCRIPTOR_COUNT(c->essence_container_count));

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

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

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

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

  547.     }

  548. 

  549.     if (c->essence_container_count > 1)

  550.         avio_write(pb, multiple_desc_ul, 16);

  551. }

  552. 

  553. static void mxf_write_preface(AVFormatContext *s)

  554. {

  555.     MXFContext *mxf = s->priv_data;

  556.     AVIOContext *pb = s->pb;

  557. 

  558.     mxf_write_metadata_key(pb, 0x012f00);

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

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

  561. 

  562.     // write preface set uid

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

  564.     mxf_write_uuid(pb, Preface, 0);

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

  566. 

  567.     // last modified date

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

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

  570. 

  571.     // write version

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

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

  574. 

  575.     // write identification_refs

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

  577.     mxf_write_refs_count(pb, 1);

  578.     mxf_write_uuid(pb, Identification, 0);

  579. 

  580.     // write content_storage_refs

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

  582.     mxf_write_uuid(pb, ContentStorage, 0);

  583. 

  584.     // operational pattern

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

  586.     avio_write(pb, op1a_ul, 16);

  587. 

  588.     // write essence_container_refs

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

  590.     mxf_write_essence_container_refs(s);

  591. 

  592.     // write dm_scheme_refs

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

  594.     avio_wb64(pb, 0);

  595. }

  596. 

  597. /*

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

  599.  */

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

  601. {

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

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

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

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

  606. }

  607. 

  608. static void mxf_write_identification(AVFormatContext *s)

  609. {

  610.     MXFContext *mxf = s->priv_data;

  611.     AVIOContext *pb = s->pb;

  612.     const char *company = "FFmpeg";

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

  614.     const char *version;

  615.     int length;

  616. 

  617.     mxf_write_metadata_key(pb, 0x013000);

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

  619. 

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

  621.         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);

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

  623.     klv_encode_ber_length(pb, length);

  624. 

  625.     // write uid

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

  627.     mxf_write_uuid(pb, Identification, 0);

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

  629. 

  630.     // write generation uid

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

  632.     mxf_write_uuid(pb, Identification, 1);

  633. 

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

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

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

  637. 

  638.     // write product uid

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

  640.     mxf_write_uuid(pb, Identification, 2);

  641. 

  642.     // modification date

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

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

  645. }

  646. 

  647. static void mxf_write_content_storage(AVFormatContext *s)

  648. {

  649.     AVIOContext *pb = s->pb;

  650. 

  651.     mxf_write_metadata_key(pb, 0x011800);

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

  653.     klv_encode_ber_length(pb, 92);

  654. 

  655.     // write uid

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

  657.     mxf_write_uuid(pb, ContentStorage, 0);

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

  659. 

  660.     // write package reference

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

  662.     mxf_write_refs_count(pb, 2);

  663.     mxf_write_uuid(pb, MaterialPackage, 0);

  664.     mxf_write_uuid(pb, SourcePackage, 0);

  665. 

  666.     // write essence container data

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

  668.     mxf_write_refs_count(pb, 1);

  669.     mxf_write_uuid(pb, EssenceContainerData, 0);

  670. }

  671. 

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

  673. {

  674.     MXFContext *mxf = s->priv_data;

  675.     AVIOContext *pb = s->pb;

  676.     MXFStreamContext *sc = st->priv_data;

  677. 

  678.     mxf_write_metadata_key(pb, 0x013b00);

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

  680.     klv_encode_ber_length(pb, 80);

  681. 

  682.     // write track uid

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

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

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

  686. 

  687.     // write track id

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

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

  690. 

  691.     // write track number

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

  693.     if (type == MaterialPackage)

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

  695.     else

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

  697. 

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

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

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

  701. 

  702.     // write origin

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

  704.     avio_wb64(pb, 0);

  705. 

  706.     // write sequence refs

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

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

  709. }

  710. 

  711. 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 };

  712. 

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

  714. {

  715.     MXFContext *mxf = s->priv_data;

  716.     AVIOContext *pb = s->pb;

  717. 

  718.     // find data define uls

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

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

  721.         avio_write(pb, smpte_12m_timecode_track_data_ul, 16);

  722.     else {

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

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

  725.     }

  726. 

  727.     // write duration

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

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

  730. }

  731. 

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

  733. {

  734.     MXFContext *mxf = s->priv_data;

  735.     AVIOContext *pb = s->pb;

  736.     enum MXFMetadataSetType component;

  737. 

  738.     mxf_write_metadata_key(pb, 0x010f00);

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

  740.     klv_encode_ber_length(pb, 80);

  741. 

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

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

  744. 

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

  746.     mxf_write_common_fields(s, st);

  747. 

  748.     // write structural component

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

  750.     mxf_write_refs_count(pb, 1);

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

  752.         component = TimecodeComponent;

  753.     else

  754.         component = SourceClip;

  755.     if (type == SourcePackage)

  756.         component += TypeBottom;

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

  758. }

  759. 

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

  761. {

  762.     MXFContext *mxf = s->priv_data;

  763.     AVIOContext *pb = s->pb;

  764. 

  765.     mxf_write_metadata_key(pb, 0x011400);

  766.     klv_encode_ber_length(pb, 75);

  767. 

  768.     // UID

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

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

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

  772. 

  773.     mxf_write_common_fields(s, st);

  774. 

  775.     // Start Time Code

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

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

  778. 

  779.     // Rounded Time Code Base

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

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

  782. 

  783.     // Drop Frame

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

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

  786. }

  787. 

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

  789. {

  790.     AVIOContext *pb = s->pb;

  791.     int i;

  792. 

  793.     mxf_write_metadata_key(pb, 0x011100);

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

  795.     klv_encode_ber_length(pb, 108);

  796. 

  797.     // write uid

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

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

  800. 

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

  802.     mxf_write_common_fields(s, st);

  803. 

  804.     // write start_position

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

  806.     avio_wb64(pb, 0);

  807. 

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

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

  810.     if (type == SourcePackage) {

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

  812.             avio_wb64(pb, 0);

  813.     } else

  814.         mxf_write_umid(s, 1);

  815. 

  816.     // write source track id

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

  818.     if (type == SourcePackage)

  819.         avio_wb32(pb, 0);

  820.     else

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

  822. }

  823. 

  824. static void mxf_write_multi_descriptor(AVFormatContext *s)

  825. {

  826.     MXFContext *mxf = s->priv_data;

  827.     AVIOContext *pb = s->pb;

  828.     const uint8_t *ul;

  829.     int i;

  830. 

  831.     mxf_write_metadata_key(pb, 0x014400);

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

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

  834. 

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

  836.     mxf_write_uuid(pb, MultipleDescriptor, 0);

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

  838. 

  839.     // write sample rate

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

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

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

  843. 

  844.     // write essence container ul

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

  846.     if (mxf->essence_container_count > 1)

  847.         ul = multiple_desc_ul;

  848.     else {

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

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

  851.     }

  852.     avio_write(pb, ul, 16);

  853. 

  854.     // write sub descriptor refs

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

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

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

  858.         mxf_write_uuid(pb, SubDescriptor, i);

  859. }

  860. 

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

  862. {

  863.     MXFContext *mxf = s->priv_data;

  864.     MXFStreamContext *sc = st->priv_data;

  865.     AVIOContext *pb = s->pb;

  866. 

  867.     avio_write(pb, key, 16);

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

  869. 

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

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

  872. 

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

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

  875. 

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

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

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

  879. 

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

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

  882. }

  883. 

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

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

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

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

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

  889. 

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

  891. {

  892.     MXFStreamContext *sc = st->priv_data;

  893.     AVIOContext *pb = s->pb;

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

  895.     int display_height;

  896.     int f1, f2;

  897.     unsigned desc_size = size+8+8+8+8+8+8+5+16+sc->interlaced*4+12+20;

  898.     if (sc->interlaced && sc->field_dominance)

  899.         desc_size += 5;

  900. 

  901.     mxf_write_generic_desc(s, st, key, desc_size);

  902. 

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

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

  905. 

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

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

  908. 

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

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

  911. 

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

  913.         display_height = 576;

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

  915.         display_height = 486;

  916.     else

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

  918. 

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

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

  921. 

  922.     // component depth

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

  924.     avio_wb32(pb, sc->component_depth);

  925. 

  926.     // horizontal subsampling

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

  928.     avio_wb32(pb, 2);

  929. 

  930.     // frame layout

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

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

  933. 

  934.     // video line map

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

  936.     case  576: f1 = 23; f2 = st->codec->codec_id == AV_CODEC_ID_DVVIDEO ? 335 : 336; break;

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

  938.     case  480: f1 = 20; f2 = st->codec->codec_id == AV_CODEC_ID_DVVIDEO ? 285 : 283; break;

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

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

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

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

  943.     }

  944. 

  945.     if (!sc->interlaced) {

  946.         f2  = 0;

  947.         f1 *= 2;

  948.     }

  949. 

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

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

  952.     avio_wb32(pb, 4);

  953.     avio_wb32(pb, f1);

  954.     if (sc->interlaced)

  955.         avio_wb32(pb, f2);

  956. 

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

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

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

  960. 

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

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

  963. 

  964.     if (sc->interlaced && sc->field_dominance) {

  965.         mxf_write_local_tag(pb, 1, 0x3212);

  966.         avio_w8(pb, sc->field_dominance);

  967.     }

  968. 

  969. }

  970. 

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

  972. {

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

  974. }

  975. 

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

  977. {

  978.     AVIOContext *pb = s->pb;

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

  980. 

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

  982. 

  983.     // bit rate

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

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

  986. 

  987.     // profile and level

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

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

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

  991.     avio_w8(pb, profile_and_level);

  992. }

  993. 

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

  995. {

  996.     AVIOContext *pb = s->pb;

  997. 

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

  999. 

  1000.     // audio locked

  1001.     mxf_write_local_tag(pb, 1, 0x3D02);

  1002.     avio_w8(pb, 1);

  1003. 

  1004.     // write audio sampling rate

  1005.     mxf_write_local_tag(pb, 8, 0x3D03);

  1006.     avio_wb32(pb, st->codec->sample_rate);

  1007.     avio_wb32(pb, 1);

  1008. 

  1009.     mxf_write_local_tag(pb, 4, 0x3D07);

  1010.     avio_wb32(pb, st->codec->channels);

  1011. 

  1012.     mxf_write_local_tag(pb, 4, 0x3D01);

  1013.     avio_wb32(pb, av_get_bits_per_sample(st->codec->codec_id));

  1014. }

  1015. 

  1016. static void mxf_write_wav_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)

  1017. {

  1018.     AVIOContext *pb = s->pb;

  1019. 

  1020.     mxf_write_generic_sound_common(s, st, key, size+6+8);

  1021. 

  1022.     mxf_write_local_tag(pb, 2, 0x3D0A);

  1023.     avio_wb16(pb, st->codec->block_align);

  1024. 

  1025.     // avg bytes per sec

  1026.     mxf_write_local_tag(pb, 4, 0x3D09);

  1027.     avio_wb32(pb, st->codec->block_align*st->codec->sample_rate);

  1028. }

  1029. 

  1030. static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)

  1031. {

  1032.     mxf_write_wav_common(s, st, mxf_wav_descriptor_key, 0);

  1033. }

  1034. 

  1035. static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)

  1036. {

  1037.     mxf_write_wav_common(s, st, mxf_aes3_descriptor_key, 0);

  1038. }

  1039. 

  1040. static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st)

  1041. {

  1042.     mxf_write_generic_sound_common(s, st, mxf_generic_sound_descriptor_key, 0);

  1043. }

  1044. 

  1045. static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)

  1046. {

  1047.     MXFContext *mxf = s->priv_data;

  1048.     AVIOContext *pb = s->pb;

  1049.     int i, track_count = s->nb_streams+1;

  1050. 

  1051.     if (type == MaterialPackage) {

  1052.         mxf_write_metadata_key(pb, 0x013600);

  1053.         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);

  1054.         klv_encode_ber_length(pb, 92 + 16*track_count);

  1055.     } else {

  1056.         mxf_write_metadata_key(pb, 0x013700);

  1057.         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);

  1058.         klv_encode_ber_length(pb, 112 + 16*track_count); // 20 bytes length for descriptor reference

  1059.     }

  1060. 

  1061.     // write uid

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

  1063.     mxf_write_uuid(pb, type, 0);

  1064.     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);

  1065.     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);

  1066. 

  1067.     // write package umid

  1068.     mxf_write_local_tag(pb, 32, 0x4401);

  1069.     mxf_write_umid(s, type == SourcePackage);

  1070.     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);

  1071. 

  1072.     // package creation date

  1073.     mxf_write_local_tag(pb, 8, 0x4405);

  1074.     avio_wb64(pb, mxf->timestamp);

  1075. 

  1076.     // package modified date

  1077.     mxf_write_local_tag(pb, 8, 0x4404);

  1078.     avio_wb64(pb, mxf->timestamp);

  1079. 

  1080.     // write track refs

  1081.     mxf_write_local_tag(pb, track_count*16 + 8, 0x4403);

  1082.     mxf_write_refs_count(pb, track_count);

  1083.     mxf_write_uuid(pb, type == MaterialPackage ? Track :

  1084.                    Track + TypeBottom, -1); // timecode track

  1085.     for (i = 0; i < s->nb_streams; i++)

  1086.         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);

  1087. 

  1088.     // write multiple descriptor reference

  1089.     if (type == SourcePackage) {

  1090.         mxf_write_local_tag(pb, 16, 0x4701);

  1091.         if (s->nb_streams > 1) {

  1092.             mxf_write_uuid(pb, MultipleDescriptor, 0);

  1093.             mxf_write_multi_descriptor(s);

  1094.         } else

  1095.             mxf_write_uuid(pb, SubDescriptor, 0);

  1096.     }

  1097. 

  1098.     // write timecode track

  1099.     mxf_write_track(s, mxf->timecode_track, type);

  1100.     mxf_write_sequence(s, mxf->timecode_track, type);

  1101.     mxf_write_timecode_component(s, mxf->timecode_track, type);

  1102. 

  1103.     for (i = 0; i < s->nb_streams; i++) {

  1104.         AVStream *st = s->streams[i];

  1105.         mxf_write_track(s, st, type);

  1106.         mxf_write_sequence(s, st, type);

  1107.         mxf_write_structural_component(s, st, type);

  1108. 

  1109.         if (type == SourcePackage) {

  1110.             MXFStreamContext *sc = st->priv_data;

  1111.             mxf_essence_container_uls[sc->index].write_desc(s, st);

  1112.         }

  1113.     }

  1114. }

  1115. 

  1116. static int mxf_write_essence_container_data(AVFormatContext *s)

  1117. {

  1118.     AVIOContext *pb = s->pb;

  1119. 

  1120.     mxf_write_metadata_key(pb, 0x012300);

  1121.     klv_encode_ber_length(pb, 72);

  1122. 

  1123.     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID

  1124.     mxf_write_uuid(pb, EssenceContainerData, 0);

  1125. 

  1126.     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID

  1127.     mxf_write_umid(s, 1);

  1128. 

  1129.     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID

  1130.     avio_wb32(pb, 1);

  1131. 

  1132.     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID

  1133.     avio_wb32(pb, 2);

  1134. 

  1135.     return 0;

  1136. }

  1137. 

  1138. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  1139. {

  1140.     mxf_write_preface(s);

  1141.     mxf_write_identification(s);

  1142.     mxf_write_content_storage(s);

  1143.     mxf_write_package(s, MaterialPackage);

  1144.     mxf_write_package(s, SourcePackage);

  1145.     mxf_write_essence_container_data(s);

  1146.     return 0;

  1147. }

  1148. 

  1149. static unsigned klv_fill_size(uint64_t size)

  1150. {

  1151.     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));

  1152.     if (pad < 20) // smallest fill item possible

  1153.         return pad + KAG_SIZE;

  1154.     else

  1155.         return pad & (KAG_SIZE-1);

  1156. }

  1157. 

  1158. static void mxf_write_index_table_segment(AVFormatContext *s)

  1159. {

  1160.     MXFContext *mxf = s->priv_data;

  1161.     AVIOContext *pb = s->pb;

  1162.     int i, j, temporal_reordering = 0;

  1163.     int key_index = mxf->last_key_index;

  1164. 

  1165.     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);

  1166. 

  1167.     if (!mxf->edit_units_count && !mxf->edit_unit_byte_count)

  1168.         return;

  1169. 

  1170.     avio_write(pb, index_table_segment_key, 16);

  1171. 

  1172.     if (mxf->edit_unit_byte_count) {

  1173.         klv_encode_ber_length(pb, 80);

  1174.     } else {

  1175.         klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1LL)*6 +

  1176.                               12+mxf->edit_units_count*(11+mxf->slice_count*4LL));

  1177.     }

  1178. 

  1179.     // instance id

  1180.     mxf_write_local_tag(pb, 16, 0x3C0A);

  1181.     mxf_write_uuid(pb, IndexTableSegment, 0);

  1182. 

  1183.     // index edit rate

  1184.     mxf_write_local_tag(pb, 8, 0x3F0B);

  1185.     avio_wb32(pb, mxf->time_base.den);

  1186.     avio_wb32(pb, mxf->time_base.num);

  1187. 

  1188.     // index start position

  1189.     mxf_write_local_tag(pb, 8, 0x3F0C);

  1190.     avio_wb64(pb, mxf->last_indexed_edit_unit);

  1191. 

  1192.     // index duration

  1193.     mxf_write_local_tag(pb, 8, 0x3F0D);

  1194.     if (mxf->edit_unit_byte_count)

  1195.         avio_wb64(pb, 0); // index table covers whole container

  1196.     else

  1197.         avio_wb64(pb, mxf->edit_units_count);

  1198. 

  1199.     // edit unit byte count

  1200.     mxf_write_local_tag(pb, 4, 0x3F05);

  1201.     avio_wb32(pb, mxf->edit_unit_byte_count);

  1202. 

  1203.     // index sid

  1204.     mxf_write_local_tag(pb, 4, 0x3F06);

  1205.     avio_wb32(pb, 2);

  1206. 

  1207.     // body sid

  1208.     mxf_write_local_tag(pb, 4, 0x3F07);

  1209.     avio_wb32(pb, 1);

  1210. 

  1211.     if (!mxf->edit_unit_byte_count) {

  1212.         // real slice count - 1

  1213.         mxf_write_local_tag(pb, 1, 0x3F08);

  1214.         avio_w8(pb, mxf->slice_count);

  1215. 

  1216.         // delta entry array

  1217.         mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);

  1218.         avio_wb32(pb, s->nb_streams+1); // num of entries

  1219.         avio_wb32(pb, 6);               // size of one entry

  1220.         // write system item delta entry

  1221.         avio_w8(pb, 0);

  1222.         avio_w8(pb, 0); // slice entry

  1223.         avio_wb32(pb, 0); // element delta

  1224.         for (i = 0; i < s->nb_streams; i++) {

  1225.             AVStream *st = s->streams[i];

  1226.             MXFStreamContext *sc = st->priv_data;

  1227.             avio_w8(pb, sc->temporal_reordering);

  1228.             if (sc->temporal_reordering)

  1229.                 temporal_reordering = 1;

  1230.             if (i == 0) { // video track

  1231.                 avio_w8(pb, 0); // slice number

  1232.                 avio_wb32(pb, KAG_SIZE); // system item size including klv fill

  1233.             } else { // audio track

  1234.                 unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;

  1235.                 audio_frame_size += klv_fill_size(audio_frame_size);

  1236.                 avio_w8(pb, 1);

  1237.                 avio_wb32(pb, (i-1)*audio_frame_size); // element delta

  1238.             }

  1239.         }

  1240. 

  1241.         mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);

  1242.         avio_wb32(pb, mxf->edit_units_count);  // num of entries

  1243.         avio_wb32(pb, 11+mxf->slice_count*4);  // size of one entry

  1244. 

  1245.         for (i = 0; i < mxf->edit_units_count; i++) {

  1246.             int temporal_offset = 0;

  1247. 

  1248.             if (!(mxf->index_entries[i].flags & 0x33)) { // I frame

  1249.                 mxf->last_key_index = key_index;

  1250.                 key_index = i;

  1251.             }

  1252. 

  1253.             if (temporal_reordering) {

  1254.                 int pic_num_in_gop = i - key_index;

  1255.                 if (pic_num_in_gop != mxf->index_entries[i].temporal_ref) {

  1256.                     for (j = key_index; j < mxf->edit_units_count; j++) {

  1257.                         if (pic_num_in_gop == mxf->index_entries[j].temporal_ref)

  1258.                             break;

  1259.                     }

  1260.                     if (j == mxf->edit_units_count)

  1261.                         av_log(s, AV_LOG_WARNING, "missing frames\n");

  1262.                     temporal_offset = j - key_index - pic_num_in_gop;

  1263.                 }

  1264.             }

  1265.             avio_w8(pb, temporal_offset);

  1266. 

  1267.             if ((mxf->index_entries[i].flags & 0x30) == 0x30) { // back and forward prediction

  1268.                 avio_w8(pb, mxf->last_key_index - i);

  1269.             } else {

  1270.                 avio_w8(pb, key_index - i); // key frame offset

  1271.                 if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward

  1272.                     mxf->last_key_index = key_index;

  1273.             }

  1274. 

  1275.             if (!(mxf->index_entries[i].flags & 0x33) && // I frame

  1276.                 mxf->index_entries[i].flags & 0x40 && !temporal_offset)

  1277.                 mxf->index_entries[i].flags |= 0x80; // random access

  1278.             avio_w8(pb, mxf->index_entries[i].flags);

  1279.             // stream offset

  1280.             avio_wb64(pb, mxf->index_entries[i].offset);

  1281.             if (s->nb_streams > 1)

  1282.                 avio_wb32(pb, mxf->index_entries[i].slice_offset);

  1283.         }

  1284. 

  1285.         mxf->last_key_index = key_index - mxf->edit_units_count;

  1286.         mxf->last_indexed_edit_unit += mxf->edit_units_count;

  1287.         mxf->edit_units_count = 0;

  1288.     }

  1289. }

  1290. 

  1291. static void mxf_write_klv_fill(AVFormatContext *s)

  1292. {

  1293.     unsigned pad = klv_fill_size(avio_tell(s->pb));

  1294.     if (pad) {

  1295.         avio_write(s->pb, klv_fill_key, 16);

  1296.         pad -= 16 + 4;

  1297.         klv_encode_ber4_length(s->pb, pad);

  1298.         ffio_fill(s->pb, 0, pad);

  1299.         av_assert1(!(avio_tell(s->pb) & (KAG_SIZE-1)));

  1300.     }

  1301. }

  1302. 

  1303. static int mxf_write_partition(AVFormatContext *s, int bodysid,

  1304.                                 int indexsid,

  1305.                                 const uint8_t *key, int write_metadata)

  1306. {

  1307.     MXFContext *mxf = s->priv_data;

  1308.     AVIOContext *pb = s->pb;

  1309.     int64_t header_byte_count_offset;

  1310.     unsigned index_byte_count = 0;

  1311.     uint64_t partition_offset = avio_tell(pb);

  1312.     int err;

  1313. 

  1314.     if (!mxf->edit_unit_byte_count && mxf->edit_units_count)

  1315.         index_byte_count = 85 + 12+(s->nb_streams+1)*6 +

  1316.             12+mxf->edit_units_count*(11+mxf->slice_count*4);

  1317.     else if (mxf->edit_unit_byte_count && indexsid)

  1318.         index_byte_count = 80;

  1319. 

  1320.     if (index_byte_count) {

  1321.         // add encoded ber length

  1322.         index_byte_count += 16 + klv_ber_length(index_byte_count);

  1323.         index_byte_count += klv_fill_size(index_byte_count);

  1324.     }

  1325. 

  1326.     if (!memcmp(key, body_partition_key, 16)) {

  1327.         if ((err = av_reallocp_array(&mxf->body_partition_offset, mxf->body_partitions_count + 1,

  1328.                                      sizeof(*mxf->body_partition_offset))) < 0) {

  1329.             mxf->body_partitions_count = 0;

  1330.             return err;

  1331.         }

  1332.         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;

  1333.     }

  1334. 

  1335.     // write klv

  1336.     avio_write(pb, key, 16);

  1337.     klv_encode_ber_length(pb, 88 + 16LL * DESCRIPTOR_COUNT(mxf->essence_container_count));

  1338. 

  1339.     // write partition value

  1340.     avio_wb16(pb, 1); // majorVersion

  1341.     avio_wb16(pb, 2); // minorVersion

  1342.     avio_wb32(pb, KAG_SIZE); // KAGSize

  1343. 

  1344.     avio_wb64(pb, partition_offset); // ThisPartition

  1345. 

  1346.     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)

  1347.         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition

  1348.     else if (!memcmp(key, footer_partition_key, 16) && mxf->body_partitions_count)

  1349.         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition

  1350.     else

  1351.         avio_wb64(pb, 0);

  1352. 

  1353.     avio_wb64(pb, mxf->footer_partition_offset); // footerPartition

  1354. 

  1355.     // set offset

  1356.     header_byte_count_offset = avio_tell(pb);

  1357.     avio_wb64(pb, 0); // headerByteCount, update later

  1358. 

  1359.     // indexTable

  1360.     avio_wb64(pb, index_byte_count); // indexByteCount

  1361.     avio_wb32(pb, index_byte_count ? indexsid : 0); // indexSID

  1362. 

  1363.     // BodyOffset

  1364.     if (bodysid && mxf->edit_units_count && mxf->body_partitions_count) {

  1365.         avio_wb64(pb, mxf->body_offset);

  1366.     } else

  1367.         avio_wb64(pb, 0);

  1368. 

  1369.     avio_wb32(pb, bodysid); // bodySID

  1370. 

  1371.     // operational pattern

  1372.     avio_write(pb, op1a_ul, 16);

  1373. 

  1374.     // essence container

  1375.     mxf_write_essence_container_refs(s);

  1376. 

  1377.     if (write_metadata) {

  1378.         // mark the start of the headermetadata and calculate metadata size

  1379.         int64_t pos, start;

  1380.         unsigned header_byte_count;

  1381. 

  1382.         mxf_write_klv_fill(s);

  1383.         start = avio_tell(s->pb);

  1384.         mxf_write_primer_pack(s);

  1385.         mxf_write_header_metadata_sets(s);

  1386.         pos = avio_tell(s->pb);

  1387.         header_byte_count = pos - start + klv_fill_size(pos);

  1388. 

  1389.         // update header_byte_count

  1390.         avio_seek(pb, header_byte_count_offset, SEEK_SET);

  1391.         avio_wb64(pb, header_byte_count);

  1392.         avio_seek(pb, pos, SEEK_SET);

  1393.     }

  1394. 

  1395.     avio_flush(pb);

  1396. 

  1397.     return 0;

  1398. }

  1399. 

  1400. static int mxf_parse_dnxhd_frame(AVFormatContext *s, AVStream *st,

  1401. AVPacket *pkt)

  1402. {

  1403.     MXFContext *mxf = s->priv_data;

  1404.     MXFStreamContext *sc = st->priv_data;

  1405.     int i, cid;

  1406.     uint8_t* header_cid;

  1407.     int frame_size = 0;

  1408. 

  1409.     if (mxf->header_written)

  1410.         return 1;

  1411. 

  1412.     if (pkt->size < 43)

  1413.         return -1;

  1414. 

  1415.     header_cid = pkt->data + 0x28;

  1416.     cid = header_cid[0] << 24 | header_cid[1] << 16 | header_cid[2] << 8 | header_cid[3];

  1417. 

  1418.     if ((frame_size = avpriv_dnxhd_get_frame_size(cid)) < 0)

  1419.         return -1;

  1420. 

  1421.     switch (cid) {

  1422.     case 1235:

  1423.         sc->index = 24;

  1424.         sc->component_depth = 10;

  1425.         break;

  1426.     case 1237:

  1427.         sc->index = 25;

  1428.         break;

  1429.     case 1238:

  1430.         sc->index = 26;

  1431.         break;

  1432.     case 1241:

  1433.         sc->index = 27;

  1434.         sc->component_depth = 10;

  1435.         break;

  1436.     case 1242:

  1437.         sc->index = 28;

  1438.         break;

  1439.     case 1243:

  1440.         sc->index = 29;

  1441.         break;

  1442.     case 1250:

  1443.         sc->index = 30;

  1444.         sc->component_depth = 10;

  1445.         break;

  1446.     case 1251:

  1447.         sc->index = 31;

  1448.         break;

  1449.     case 1252:

  1450.         sc->index = 32;

  1451.         break;

  1452.     case 1253:

  1453.         sc->index = 33;

  1454.         break;

  1455.     default:

  1456.         return -1;

  1457.     }

  1458. 

  1459.     sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;

  1460.     sc->aspect_ratio = (AVRational){ 16, 9 };

  1461. 

  1462.     mxf->edit_unit_byte_count = KAG_SIZE;

  1463.     for (i = 0; i < s->nb_streams; i++) {

  1464.         AVStream *st = s->streams[i];

  1465.         MXFStreamContext *sc = st->priv_data;

  1466.         if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

  1467.             mxf->edit_unit_byte_count += 16 + 4 + sc->aic.samples[0]*sc->aic.sample_size;

  1468.             mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1469.         } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  1470.             mxf->edit_unit_byte_count += 16 + 4 + frame_size;

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

  1472.         }

  1473.     }

  1474. 

  1475.     return 1;

  1476. }

  1477. 

  1478. static int mxf_parse_dv_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1479. {

  1480.     MXFContext *mxf = s->priv_data;

  1481.     MXFStreamContext *sc = st->priv_data;

  1482.     uint8_t *vs_pack, *vsc_pack;

  1483.     int i, ul_index, frame_size, stype, pal;

  1484. 

  1485.     if (mxf->header_written)

  1486.         return 1;

  1487. 

  1488.     // Check for minimal frame size

  1489.     if (pkt->size < 120000)

  1490.         return -1;

  1491. 

  1492.     vs_pack  = pkt->data + 80*5 + 48;

  1493.     vsc_pack = pkt->data + 80*5 + 53;

  1494.     stype    = vs_pack[3] & 0x1f;

  1495.     pal      = (vs_pack[3] >> 5) & 0x1;

  1496. 

  1497.     if ((vs_pack[2] & 0x07) == 0x02)

  1498.         sc->aspect_ratio = (AVRational){ 16, 9 };

  1499.     else

  1500.         sc->aspect_ratio = (AVRational){ 4, 3 };

  1501. 

  1502.     sc->interlaced = (vsc_pack[3] >> 4) & 0x01;

  1503.     // TODO: fix dv encoder to set proper FF/FS value in VSC pack

  1504.     // and set field dominance accordingly

  1505.     // av_log(s, AV_LOG_DEBUG, "DV vsc pack ff/ss = %x\n", vsc_pack[2] >> 6);

  1506. 

  1507.     switch (stype) {

  1508.     case 0x18: // DV100 720p

  1509.         ul_index = 6 + pal;

  1510.         frame_size = pal ? 288000 : 240000;

  1511.         if (sc->interlaced) {

  1512.             av_log(s, AV_LOG_ERROR, "source marked as interlaced but codec profile is progressive\n");

  1513.             sc->interlaced = 0;

  1514.         }

  1515.         break;

  1516.     case 0x14: // DV100 1080i

  1517.         ul_index = 4 + pal;

  1518.         frame_size = pal ? 576000 : 480000;

  1519.         break;

  1520.     case 0x04: // DV50

  1521.         ul_index = 2 + pal;

  1522.         frame_size = pal ? 288000 : 240000;

  1523.         break;

  1524.     default: // DV25

  1525.         ul_index = 0 + pal;

  1526.         frame_size = pal ? 144000 : 120000;

  1527.     }

  1528. 

  1529.     sc->index = ul_index + 16;

  1530.     sc->codec_ul =  &mxf_essence_container_uls[sc->index].codec_ul;

  1531. 

  1532.     mxf->edit_unit_byte_count = KAG_SIZE;

  1533.     for (i = 0; i < s->nb_streams; i++) {

  1534.         AVStream *st = s->streams[i];

  1535.         MXFStreamContext *sc = st->priv_data;

  1536.         if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

  1537.             mxf->edit_unit_byte_count += 16 + 4 + sc->aic.samples[0]*sc->aic.sample_size;

  1538.             mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1539.         } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  1540.             mxf->edit_unit_byte_count += 16 + 4 + frame_size;

  1541.             mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1542.         }

  1543.     }

  1544. 

  1545.     return 1;

  1546. }

  1547. 

  1548. static const UID mxf_mpeg2_codec_uls[] = {

  1549.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame

  1550.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP

  1551.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame

  1552.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP

  1553.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame

  1554.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP

  1555.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame

  1556.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP

  1557.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x05,0x02,0x00 }, // MP@H-14 I-Frame

  1558.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x05,0x03,0x00 }, // MP@H-14 Long GOP

  1559. };

  1560. 

  1561. static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)

  1562. {

  1563.     int long_gop = avctx->gop_size > 1 || avctx->has_b_frames;

  1564. 

  1565.     if (avctx->profile == 4) { // Main

  1566.         if (avctx->level == 8) // Main

  1567.             return &mxf_mpeg2_codec_uls[0+long_gop];

  1568.         else if (avctx->level == 4) // High

  1569.             return &mxf_mpeg2_codec_uls[4+long_gop];

  1570.         else if (avctx->level == 6) // High 14

  1571.             return &mxf_mpeg2_codec_uls[8+long_gop];

  1572.     } else if (avctx->profile == 0) { // 422

  1573.         if (avctx->level == 5) // Main

  1574.             return &mxf_mpeg2_codec_uls[2+long_gop];

  1575.         else if (avctx->level == 2) // High

  1576.             return &mxf_mpeg2_codec_uls[6+long_gop];

  1577.     }

  1578.     return NULL;

  1579. }

  1580. 

  1581. static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st,

  1582.                                  AVPacket *pkt, MXFIndexEntry *e)

  1583. {

  1584.     MXFStreamContext *sc = st->priv_data;

  1585.     uint32_t c = -1;

  1586.     int i;

  1587. 

  1588.     for(i = 0; i < pkt->size - 4; i++) {

  1589.         c = (c<<8) + pkt->data[i];

  1590.         if (c == 0x1b5) {

  1591.             if ((pkt->data[i+1] & 0xf0) == 0x10) { // seq ext

  1592.                 st->codec->profile = pkt->data[i+1] & 0x07;

  1593.                 st->codec->level   = pkt->data[i+2] >> 4;

  1594.             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext

  1595.                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame

  1596.                 if (sc->interlaced)

  1597.                     sc->field_dominance = 1 + !(pkt->data[i+4] & 0x80); // top field first

  1598.                 break;

  1599.             }

  1600.         } else if (c == 0x1b8) { // gop

  1601.             if (pkt->data[i+4]>>6 & 0x01) { // closed

  1602.                 sc->closed_gop = 1;

  1603.                 if (e->flags & 0x40) // sequence header present

  1604.                     e->flags |= 0x80; // random access

  1605.             }

  1606.         } else if (c == 0x1b3) { // seq

  1607.             e->flags |= 0x40;

  1608.             switch ((pkt->data[i+4]>>4) & 0xf) {

  1609.             case 2:  sc->aspect_ratio = (AVRational){  4,  3}; break;

  1610.             case 3:  sc->aspect_ratio = (AVRational){ 16,  9}; break;

  1611.             case 4:  sc->aspect_ratio = (AVRational){221,100}; break;

  1612.             default:

  1613.                 av_reduce(&sc->aspect_ratio.num, &sc->aspect_ratio.den,

  1614.                           st->codec->width, st->codec->height, 1024*1024);

  1615.             }

  1616.         } else if (c == 0x100) { // pic

  1617.             int pict_type = (pkt->data[i+2]>>3) & 0x07;

  1618.             e->temporal_ref = (pkt->data[i+1]<<2) | (pkt->data[i+2]>>6);

  1619.             if (pict_type == 2) { // P frame

  1620.                 e->flags |= 0x22;

  1621.                 sc->closed_gop = 0; // reset closed gop, don't matter anymore

  1622.             } else if (pict_type == 3) { // B frame

  1623.                 if (sc->closed_gop)

  1624.                     e->flags |= 0x13; // only backward prediction

  1625.                 else

  1626.                     e->flags |= 0x33;

  1627.                 sc->temporal_reordering = -1;

  1628.             } else if (!pict_type) {

  1629.                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");

  1630.                 return 0;

  1631.             }

  1632.         }

  1633.     }

  1634.     if (s->oformat != &ff_mxf_d10_muxer)

  1635.         sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);

  1636.     return !!sc->codec_ul;

  1637. }

  1638. 

  1639. static uint64_t mxf_parse_timestamp(time_t timestamp)

  1640. {

  1641.     struct tm *time = gmtime(&timestamp);

  1642.     if (!time)

  1643.         return 0;

  1644.     return (uint64_t)(time->tm_year+1900) << 48 |

  1645.            (uint64_t)(time->tm_mon+1)     << 40 |

  1646.            (uint64_t) time->tm_mday       << 32 |

  1647.                       time->tm_hour       << 24 |

  1648.                       time->tm_min        << 16 |

  1649.                       time->tm_sec        << 8;

  1650. }

  1651. 

  1652. static void mxf_gen_umid(AVFormatContext *s)

  1653. {

  1654.     MXFContext *mxf = s->priv_data;

  1655.     uint32_t seed = av_get_random_seed();

  1656.     uint64_t umid = seed + 0x5294713400000000LL;

  1657. 

  1658.     AV_WB64(mxf->umid  , umid);

  1659.     AV_WB64(mxf->umid+8, umid>>8);

  1660. 

  1661.     mxf->instance_number = seed;

  1662. }

  1663. 

  1664. static int mxf_write_header(AVFormatContext *s)

  1665. {

  1666.     MXFContext *mxf = s->priv_data;

  1667.     int i, ret;

  1668.     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};

  1669.     const MXFSamplesPerFrame *spf = NULL;

  1670.     AVDictionaryEntry *t;

  1671.     int64_t timestamp = 0;

  1672.     AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0);

  1673. 

  1674.     if (!s->nb_streams)

  1675.         return -1;

  1676. 

  1677.     for (i = 0; i < s->nb_streams; i++) {

  1678.         AVStream *st = s->streams[i];

  1679.         MXFStreamContext *sc = av_mallocz(sizeof(*sc));

  1680.         if (!sc)

  1681.             return AVERROR(ENOMEM);

  1682.         st->priv_data = sc;

  1683. 

  1684.         if ((i == 0) ^ (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)) {

  1685.             av_log(s, AV_LOG_ERROR, "there must be exactly one video stream and it must be the first one\n");

  1686.             return -1;

  1687.         }

  1688. 

  1689.         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  1690.             AVRational rate, tbc = st->codec->time_base;

  1691.             // Default component depth to 8

  1692.             sc->component_depth = 8;

  1693.             mxf->timecode_base = (tbc.den + tbc.num/2) / tbc.num;

  1694.             spf = ff_mxf_get_samples_per_frame(s, tbc);

  1695.             if (!spf) {

  1696.                 av_log(s, AV_LOG_ERROR, "Unsupported video frame rate %d/%d\n",

  1697.                        tbc.den, tbc.num);

  1698.                 return AVERROR(EINVAL);

  1699.             }

  1700.             mxf->time_base = spf->time_base;

  1701.             rate = av_inv_q(mxf->time_base);

  1702.             avpriv_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);

  1703.             if (!tcr)

  1704.                 tcr = av_dict_get(st->metadata, "timecode", NULL, 0);

  1705.             if (tcr)

  1706.                 ret = av_timecode_init_from_string(&mxf->tc, rate, tcr->value, s);

  1707.             else

  1708.                 ret = av_timecode_init(&mxf->tc, rate, 0, 0, s);

  1709.             if (ret < 0)

  1710.                 return ret;

  1711.             if (s->oformat == &ff_mxf_d10_muxer) {

  1712.                 if (st->codec->bit_rate == 50000000) {

  1713.                     if (mxf->time_base.den == 25) sc->index = 3;

  1714.                     else                          sc->index = 5;

  1715.                 } else if (st->codec->bit_rate == 40000000) {

  1716.                     if (mxf->time_base.den == 25) sc->index = 7;

  1717.                     else                          sc->index = 9;

  1718.                 } else if (st->codec->bit_rate == 30000000) {

  1719.                     if (mxf->time_base.den == 25) sc->index = 11;

  1720.                     else                          sc->index = 13;

  1721.                 } else {

  1722.                     av_log(s, AV_LOG_ERROR, "error MXF D-10 only support 30/40/50 mbit/s\n");

  1723.                     return -1;

  1724.                 }

  1725. 

  1726.                 mxf->edit_unit_byte_count = KAG_SIZE; // system element

  1727.                 mxf->edit_unit_byte_count += 16 + 4 + (uint64_t)st->codec->bit_rate *

  1728.                     mxf->time_base.num / (8*mxf->time_base.den);

  1729.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1730.                 mxf->edit_unit_byte_count += 16 + 4 + 4 + spf->samples_per_frame[0]*8*4;

  1731.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1732.             }

  1733.         } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

  1734.             if (st->codec->sample_rate != 48000) {

  1735.                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");

  1736.                 return -1;

  1737.             }

  1738.             avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);

  1739.             if (s->oformat == &ff_mxf_d10_muxer) {

  1740.                 if (st->index != 1) {

  1741.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support one audio track\n");

  1742.                     return -1;

  1743.                 }

  1744.                 if (st->codec->codec_id != AV_CODEC_ID_PCM_S16LE &&

  1745.                     st->codec->codec_id != AV_CODEC_ID_PCM_S24LE) {

  1746.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support 16 or 24 bits le audio\n");

  1747.                 }

  1748.                 sc->index = ((MXFStreamContext*)s->streams[0]->priv_data)->index + 1;

  1749.             } else

  1750.             mxf->slice_count = 1;

  1751.         }

  1752. 

  1753.         if (!sc->index) {

  1754.             sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);

  1755.             if (sc->index == -1) {

  1756.                 av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "

  1757.                        "codec not currently supported in container\n", i);

  1758.                 return -1;

  1759.             }

  1760.         }

  1761. 

  1762.         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;

  1763. 

  1764.         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);

  1765.         sc->track_essence_element_key[15] = present[sc->index];

  1766.         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);

  1767. 

  1768.         if (!present[sc->index])

  1769.             mxf->essence_container_count++;

  1770.         present[sc->index]++;

  1771.     }

  1772. 

  1773.     if (s->oformat == &ff_mxf_d10_muxer) {

  1774.         mxf->essence_container_count = 1;

  1775.     }

  1776. 

  1777.     if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))

  1778.         mxf_gen_umid(s);

  1779. 

  1780.     for (i = 0; i < s->nb_streams; i++) {

  1781.         MXFStreamContext *sc = s->streams[i]->priv_data;

  1782.         // update element count

  1783.         sc->track_essence_element_key[13] = present[sc->index];

  1784.         if (!memcmp(sc->track_essence_element_key, mxf_essence_container_uls[15].element_ul, 13)) // DV

  1785.             sc->order = (0x15 << 24) | AV_RB32(sc->track_essence_element_key+13);

  1786.         else

  1787.             sc->order = AV_RB32(sc->track_essence_element_key+12);

  1788.     }

  1789. 

  1790.     if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))

  1791.         timestamp = ff_iso8601_to_unix_time(t->value);

  1792.     if (timestamp)

  1793.         mxf->timestamp = mxf_parse_timestamp(timestamp);

  1794.     mxf->duration = -1;

  1795. 

  1796.     mxf->timecode_track = av_mallocz(sizeof(*mxf->timecode_track));

  1797.     if (!mxf->timecode_track)

  1798.         return AVERROR(ENOMEM);

  1799.     mxf->timecode_track->priv_data = av_mallocz(sizeof(MXFStreamContext));

  1800.     if (!mxf->timecode_track->priv_data)

  1801.         return AVERROR(ENOMEM);

  1802.     mxf->timecode_track->index = -1;

  1803. 

  1804.     if (!spf)

  1805.         spf = ff_mxf_get_samples_per_frame(s, (AVRational){ 1, 25 });

  1806. 

  1807.     if (ff_audio_interleave_init(s, spf->samples_per_frame, mxf->time_base) < 0)

  1808.         return -1;

  1809. 

  1810.     return 0;

  1811. }

  1812. 

  1813. static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };

  1814. 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 };

  1815. 

  1816. static void mxf_write_system_item(AVFormatContext *s)

  1817. {

  1818.     MXFContext *mxf = s->priv_data;

  1819.     AVIOContext *pb = s->pb;

  1820.     unsigned frame;

  1821.     uint32_t time_code;

  1822. 

  1823.     frame = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  1824. 

  1825.     // write system metadata pack

  1826.     avio_write(pb, system_metadata_pack_key, 16);

  1827.     klv_encode_ber4_length(pb, 57);

  1828.     avio_w8(pb, 0x5c); // UL, user date/time stamp, picture and sound item present

  1829.     avio_w8(pb, 0x04); // content package rate

  1830.     avio_w8(pb, 0x00); // content package type

  1831.     avio_wb16(pb, 0x00); // channel handle

  1832.     avio_wb16(pb, (mxf->tc.start + frame) & 0xFFFF); // continuity count, supposed to overflow

  1833.     if (mxf->essence_container_count > 1)

  1834.         avio_write(pb, multiple_desc_ul, 16);

  1835.     else {

  1836.         MXFStreamContext *sc = s->streams[0]->priv_data;

  1837.         avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);

  1838.     }

  1839.     avio_w8(pb, 0);

  1840.     avio_wb64(pb, 0);

  1841.     avio_wb64(pb, 0); // creation date/time stamp

  1842. 

  1843.     avio_w8(pb, 0x81); // SMPTE 12M time code

  1844.     time_code = av_timecode_get_smpte_from_framenum(&mxf->tc, frame);

  1845.     avio_wb32(pb, time_code);

  1846.     avio_wb32(pb, 0); // binary group data

  1847.     avio_wb64(pb, 0);

  1848. 

  1849.     // write system metadata package set

  1850.     avio_write(pb, system_metadata_package_set_key, 16);

  1851.     klv_encode_ber4_length(pb, 35);

  1852.     avio_w8(pb, 0x83); // UMID

  1853.     avio_wb16(pb, 0x20);

  1854.     mxf_write_umid(s, 1);

  1855. }

  1856. 

  1857. static void mxf_write_d10_video_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1858. {

  1859.     MXFContext *mxf = s->priv_data;

  1860.     AVIOContext *pb = s->pb;

  1861.     int packet_size = (uint64_t)st->codec->bit_rate*mxf->time_base.num /

  1862.         (8*mxf->time_base.den); // frame size

  1863.     int pad;

  1864. 

  1865.     packet_size += 16 + 4;

  1866.     packet_size += klv_fill_size(packet_size);

  1867. 

  1868.     klv_encode_ber4_length(pb, pkt->size);

  1869.     avio_write(pb, pkt->data, pkt->size);

  1870. 

  1871.     // ensure CBR muxing by padding to correct video frame size

  1872.     pad = packet_size - pkt->size - 16 - 4;

  1873.     if (pad > 20) {

  1874.         avio_write(s->pb, klv_fill_key, 16);

  1875.         pad -= 16 + 4;

  1876.         klv_encode_ber4_length(s->pb, pad);

  1877.         ffio_fill(s->pb, 0, pad);

  1878.         av_assert1(!(avio_tell(s->pb) & (KAG_SIZE-1)));

  1879.     } else {

  1880.         av_log(s, AV_LOG_WARNING, "cannot fill d-10 video packet\n");

  1881.         ffio_fill(s->pb, 0, pad);

  1882.     }

  1883. }

  1884. 

  1885. static void mxf_write_d10_audio_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1886. {

  1887.     MXFContext *mxf = s->priv_data;

  1888.     AVIOContext *pb = s->pb;

  1889.     int frame_size = pkt->size / st->codec->block_align;

  1890.     uint8_t *samples = pkt->data;

  1891.     uint8_t *end = pkt->data + pkt->size;

  1892.     int i;

  1893. 

  1894.     klv_encode_ber4_length(pb, 4 + frame_size*4*8);

  1895. 

  1896.     avio_w8(pb, (frame_size == 1920 ? 0 : (mxf->edit_units_count-1) % 5 + 1));

  1897.     avio_wl16(pb, frame_size);

  1898.     avio_w8(pb, (1<<st->codec->channels)-1);

  1899. 

  1900.     while (samples < end) {

  1901.         for (i = 0; i < st->codec->channels; i++) {

  1902.             uint32_t sample;

  1903.             if (st->codec->codec_id == AV_CODEC_ID_PCM_S24LE) {

  1904.                 sample = AV_RL24(samples)<< 4;

  1905.                 samples += 3;

  1906.             } else {

  1907.                 sample = AV_RL16(samples)<<12;

  1908.                 samples += 2;

  1909.             }

  1910.             avio_wl32(pb, sample | i);

  1911.         }

  1912.         for (; i < 8; i++)

  1913.             avio_wl32(pb, i);

  1914.     }

  1915. }

  1916. 

  1917. static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)

  1918. {

  1919.     MXFContext *mxf = s->priv_data;

  1920.     AVIOContext *pb = s->pb;

  1921.     AVStream *st = s->streams[pkt->stream_index];

  1922.     MXFStreamContext *sc = st->priv_data;

  1923.     MXFIndexEntry ie = {0};

  1924.     int err;

  1925. 

  1926.     if (!mxf->edit_unit_byte_count && !(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {

  1927.         if ((err = av_reallocp_array(&mxf->index_entries, mxf->edit_units_count

  1928.                                      + EDIT_UNITS_PER_BODY, sizeof(*mxf->index_entries))) < 0) {

  1929.             mxf->edit_units_count = 0;

  1930.             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");

  1931.             return err;

  1932.         }

  1933.     }

  1934. 

  1935.     if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO) {

  1936.         if (!mxf_parse_mpeg2_frame(s, st, pkt, &ie)) {

  1937.             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");

  1938.             return -1;

  1939.         }

  1940.     } else if (st->codec->codec_id == AV_CODEC_ID_DNXHD) {

  1941.         if (!mxf_parse_dnxhd_frame(s, st, pkt)) {

  1942.             av_log(s, AV_LOG_ERROR, "could not get dnxhd profile\n");

  1943.             return -1;

  1944.         }

  1945.     } else if (st->codec->codec_id == AV_CODEC_ID_DVVIDEO) {

  1946.         if (!mxf_parse_dv_frame(s, st, pkt)) {

  1947.             av_log(s, AV_LOG_ERROR, "could not get dv profile\n");

  1948.             return -1;

  1949.         }

  1950.     }

  1951. 

  1952.     if (!mxf->header_written) {

  1953.         if (mxf->edit_unit_byte_count) {

  1954.             if ((err = mxf_write_partition(s, 1, 2, header_open_partition_key, 1)) < 0)

  1955.                 return err;

  1956.             mxf_write_klv_fill(s);

  1957.             mxf_write_index_table_segment(s);

  1958.         } else {

  1959.             if ((err = mxf_write_partition(s, 0, 0, header_open_partition_key, 1)) < 0)

  1960.                 return err;

  1961.         }

  1962.         mxf->header_written = 1;

  1963.     }

  1964. 

  1965.     if (st->index == 0) {

  1966.         if (!mxf->edit_unit_byte_count &&

  1967.             (!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&

  1968.             !(ie.flags & 0x33)) { // I frame, Gop start

  1969.             mxf_write_klv_fill(s);

  1970.             if ((err = mxf_write_partition(s, 1, 2, body_partition_key, 0)) < 0)

  1971.                 return err;

  1972.             mxf_write_klv_fill(s);

  1973.             mxf_write_index_table_segment(s);

  1974.         }

  1975. 

  1976.         mxf_write_klv_fill(s);

  1977.         mxf_write_system_item(s);

  1978. 

  1979.         if (!mxf->edit_unit_byte_count) {

  1980.             mxf->index_entries[mxf->edit_units_count].offset = mxf->body_offset;

  1981.             mxf->index_entries[mxf->edit_units_count].flags = ie.flags;

  1982.             mxf->index_entries[mxf->edit_units_count].temporal_ref = ie.temporal_ref;

  1983.             mxf->body_offset += KAG_SIZE; // size of system element

  1984.         }

  1985.         mxf->edit_units_count++;

  1986.     } else if (!mxf->edit_unit_byte_count && st->index == 1) {

  1987.         mxf->index_entries[mxf->edit_units_count-1].slice_offset =

  1988.             mxf->body_offset - mxf->index_entries[mxf->edit_units_count-1].offset;

  1989.     }

  1990. 

  1991.     mxf_write_klv_fill(s);

  1992.     avio_write(pb, sc->track_essence_element_key, 16); // write key

  1993.     if (s->oformat == &ff_mxf_d10_muxer) {

  1994.         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)

  1995.             mxf_write_d10_video_packet(s, st, pkt);

  1996.         else

  1997.             mxf_write_d10_audio_packet(s, st, pkt);

  1998.     } else {

  1999.         klv_encode_ber4_length(pb, pkt->size); // write length

  2000.         avio_write(pb, pkt->data, pkt->size);

  2001.         mxf->body_offset += 16+4+pkt->size + klv_fill_size(16+4+pkt->size);

  2002.     }

  2003. 

  2004.     avio_flush(pb);

  2005. 

  2006.     return 0;

  2007. }

  2008. 

  2009. static void mxf_write_random_index_pack(AVFormatContext *s)

  2010. {

  2011.     MXFContext *mxf = s->priv_data;

  2012.     AVIOContext *pb = s->pb;

  2013.     uint64_t pos = avio_tell(pb);

  2014.     int i;

  2015. 

  2016.     avio_write(pb, random_index_pack_key, 16);

  2017.     klv_encode_ber_length(pb, 28 + 12LL*mxf->body_partitions_count);

  2018. 

  2019.     if (mxf->edit_unit_byte_count)

  2020.         avio_wb32(pb, 1); // BodySID of header partition

  2021.     else

  2022.         avio_wb32(pb, 0);

  2023.     avio_wb64(pb, 0); // offset of header partition

  2024. 

  2025.     for (i = 0; i < mxf->body_partitions_count; i++) {

  2026.         avio_wb32(pb, 1); // BodySID

  2027.         avio_wb64(pb, mxf->body_partition_offset[i]);

  2028.     }

  2029. 

  2030.     avio_wb32(pb, 0); // BodySID of footer partition

  2031.     avio_wb64(pb, mxf->footer_partition_offset);

  2032. 

  2033.     avio_wb32(pb, avio_tell(pb) - pos + 4);

  2034. }

  2035. 

  2036. static int mxf_write_footer(AVFormatContext *s)

  2037. {

  2038.     MXFContext *mxf = s->priv_data;

  2039.     AVIOContext *pb = s->pb;

  2040.     int err;

  2041. 

  2042.     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  2043. 

  2044.     mxf_write_klv_fill(s);

  2045.     mxf->footer_partition_offset = avio_tell(pb);

  2046.     if (mxf->edit_unit_byte_count) { // no need to repeat index

  2047.         if ((err = mxf_write_partition(s, 0, 0, footer_partition_key, 0)) < 0)

  2048.             return err;

  2049.     } else {

  2050.         if ((err = mxf_write_partition(s, 0, 2, footer_partition_key, 0)) < 0)

  2051.             return err;

  2052.         mxf_write_klv_fill(s);

  2053.         mxf_write_index_table_segment(s);

  2054.     }

  2055. 

  2056.     mxf_write_klv_fill(s);

  2057.     mxf_write_random_index_pack(s);

  2058. 

  2059.     if (s->pb->seekable) {

  2060.         avio_seek(pb, 0, SEEK_SET);

  2061.         if (mxf->edit_unit_byte_count) {

  2062.             if ((err = mxf_write_partition(s, 1, 2, header_closed_partition_key, 1)) < 0)

  2063.                 return err;

  2064.             mxf_write_klv_fill(s);

  2065.             mxf_write_index_table_segment(s);

  2066.         } else {

  2067.             if ((err = mxf_write_partition(s, 0, 0, header_closed_partition_key, 1)) < 0)

  2068.                 return err;

  2069.         }

  2070.     }

  2071. 

  2072.     ff_audio_interleave_close(s);

  2073. 

  2074.     av_freep(&mxf->index_entries);

  2075.     av_freep(&mxf->body_partition_offset);

  2076.     av_freep(&mxf->timecode_track->priv_data);

  2077.     av_freep(&mxf->timecode_track);

  2078. 

  2079.     mxf_free(s);

  2080. 

  2081.     return 0;

  2082. }

  2083. 

  2084. static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  2085. {

  2086.     int i, stream_count = 0;

  2087. 

  2088.     for (i = 0; i < s->nb_streams; i++)

  2089.         stream_count += !!s->streams[i]->last_in_packet_buffer;

  2090. 

  2091.     if (stream_count && (s->nb_streams == stream_count || flush)) {

  2092.         AVPacketList *pktl = s->packet_buffer;

  2093.         if (s->nb_streams != stream_count) {

  2094.             AVPacketList *last = NULL;

  2095.             // find last packet in edit unit

  2096.             while (pktl) {

  2097.                 if (!stream_count || pktl->pkt.stream_index == 0)

  2098.                     break;

  2099.                 last = pktl;

  2100.                 pktl = pktl->next;

  2101.                 stream_count--;

  2102.             }

  2103.             // purge packet queue

  2104.             while (pktl) {

  2105.                 AVPacketList *next = pktl->next;

  2106. 

  2107.                 if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)

  2108.                     s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;

  2109.                 av_free_packet(&pktl->pkt);

  2110.                 av_freep(&pktl);

  2111.                 pktl = next;

  2112.             }

  2113.             if (last)

  2114.                 last->next = NULL;

  2115.             else {

  2116.                 s->packet_buffer = NULL;

  2117.                 s->packet_buffer_end= NULL;

  2118.                 goto out;

  2119.             }

  2120.             pktl = s->packet_buffer;

  2121.         }

  2122. 

  2123.         *out = pktl->pkt;

  2124.         av_dlog(s, "out st:%d dts:%"PRId64"\n", (*out).stream_index, (*out).dts);

  2125.         s->packet_buffer = pktl->next;

  2126.         if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)

  2127.             s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;

  2128.         if(!s->packet_buffer)

  2129.             s->packet_buffer_end= NULL;

  2130.         av_freep(&pktl);

  2131.         return 1;

  2132.     } else {

  2133.     out:

  2134.         av_init_packet(out);

  2135.         return 0;

  2136.     }

  2137. }

  2138. 

  2139. static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)

  2140. {

  2141.     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;

  2142.     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;

  2143. 

  2144.     return next->dts > pkt->dts ||

  2145.         (next->dts == pkt->dts && sc->order < sc2->order);

  2146. }

  2147. 

  2148. static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  2149. {

  2150.     return ff_audio_rechunk_interleave(s, out, pkt, flush,

  2151.                                mxf_interleave_get_packet, mxf_compare_timestamps);

  2152. }

  2153. 

  2154. AVOutputFormat ff_mxf_muxer = {

  2155.     .name              = "mxf",

  2156.     .long_name         = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),

  2157.     .mime_type         = "application/mxf",

  2158.     .extensions        = "mxf",

  2159.     .priv_data_size    = sizeof(MXFContext),

  2160.     .audio_codec       = AV_CODEC_ID_PCM_S16LE,

  2161.     .video_codec       = AV_CODEC_ID_MPEG2VIDEO,

  2162.     .write_header      = mxf_write_header,

  2163.     .write_packet      = mxf_write_packet,

  2164.     .write_trailer     = mxf_write_footer,

  2165.     .flags             = AVFMT_NOTIMESTAMPS,

  2166.     .interleave_packet = mxf_interleave,

  2167. };

  2168. 

  2169. AVOutputFormat ff_mxf_d10_muxer = {

  2170.     .name              = "mxf_d10",

  2171.     .long_name         = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format) D-10 Mapping"),

  2172.     .mime_type         = "application/mxf",

  2173.     .priv_data_size    = sizeof(MXFContext),

  2174.     .audio_codec       = AV_CODEC_ID_PCM_S16LE,

  2175.     .video_codec       = AV_CODEC_ID_MPEG2VIDEO,

  2176.     .write_header      = mxf_write_header,

  2177.     .write_packet      = mxf_write_packet,

  2178.     .write_trailer     = mxf_write_footer,

  2179.     .flags             = AVFMT_NOTIMESTAMPS,

  2180.     .interleave_packet = mxf_interleave,

  2181. };