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FFmpeg/libavformat/mxfenc.c

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  1. /*

  2.  * MXF muxer

  3.  * Copyright (c) 2008 GUCAS, Zhentan Feng <spyfeng at gmail dot com>

  4.  * Copyright (c) 2008 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

  8.  * FFmpeg is free software; you can redistribute it and/or

  9.  * modify it under the terms of the GNU Lesser General Public

  10.  * License as published by the Free Software Foundation; either

  11.  * version 2.1 of the License, or (at your option) any later version.

  12.  *

  13.  * FFmpeg is distributed in the hope that it will be useful,

  14.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  16.  * Lesser General Public License for more details.

  17.  *

  18.  * You should have received a copy of the GNU Lesser General Public

  19.  * License along with FFmpeg; if not, write to the Free Software

  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  21.  */

  22. 

  23. /*

  24.  * References

  25.  * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value

  26.  * SMPTE 377M MXF File Format Specifications

  27.  * SMPTE 379M MXF Generic Container

  28.  * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container

  29.  * SMPTE RP210: SMPTE Metadata Dictionary

  30.  * SMPTE RP224: Registry of SMPTE Universal Labels

  31.  */

  32. 

  33. //#define DEBUG

  34. 

  35. #include <math.h>

  36. #include <time.h>

  37. 

  38. #include "libavutil/opt.h"

  39. #include "libavutil/random_seed.h"

  40. #include "libavutil/timecode.h"

  41. #include "libavutil/avassert.h"

  42. #include "libavcodec/bytestream.h"

  43. #include "libavcodec/dnxhddata.h"

  44. #include "audiointerleave.h"

  45. #include "avformat.h"

  46. #include "internal.h"

  47. #include "mxf.h"

  48. #include "config.h"

  49. 

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

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

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

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

  54. 

  55. extern AVOutputFormat ff_mxf_d10_muxer;

  56. 

  57. #define EDIT_UNITS_PER_BODY 250

  58. #define KAG_SIZE 512

  59. 

  60. typedef struct {

  61.     int local_tag;

  62.     UID uid;

  63. } MXFLocalTagPair;

  64. 

  65. typedef struct {

  66.     uint8_t flags;

  67.     uint64_t offset;

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

  69.     uint16_t temporal_ref;

  70. } MXFIndexEntry;

  71. 

  72. typedef struct {

  73.     AudioInterleaveContext aic;

  74.     UID track_essence_element_key;

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

  76.     const UID *codec_ul;

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

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

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

  80.     int component_depth;

  81.     int temporal_reordering;

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

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

  84. } MXFStreamContext;

  85. 

  86. typedef struct {

  87.     UID container_ul;

  88.     UID element_ul;

  89.     UID codec_ul;

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

  91. } MXFContainerEssenceEntry;

  92. 

  93. static const struct {

  94.     enum AVCodecID id;

  95.     int index;

  96. } mxf_essence_mappings[] = {

  97.     { AV_CODEC_ID_MPEG2VIDEO, 0 },

  98.     { AV_CODEC_ID_PCM_S24LE,  1 },

  99.     { AV_CODEC_ID_PCM_S16LE,  1 },

  100.     { AV_CODEC_ID_DVVIDEO,   15 },

  101.     { AV_CODEC_ID_DNXHD,     24 },

  102.     { AV_CODEC_ID_NONE }

  103. };

  104. 

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

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

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

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

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

  110. 

  111. static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {

  112.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },

  113.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  114.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },

  115.       mxf_write_mpegvideo_desc },

  116.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },

  117.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },

  118.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  119.       mxf_write_aes3_desc },

  120.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },

  121.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },

  122.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  123.       mxf_write_wav_desc },

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

  125.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },

  126.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  128.       mxf_write_cdci_desc },

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

  130.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  131.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  132.       mxf_write_generic_sound_desc },

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

  134.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },

  135.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  137.       mxf_write_cdci_desc },

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

  139.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  140.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  141.       mxf_write_generic_sound_desc },

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

  143.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },

  144.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  146.       mxf_write_cdci_desc },

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

  148.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  149.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  150.       mxf_write_generic_sound_desc },

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

  152.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },

  153.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  155.       mxf_write_cdci_desc },

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

  157.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  158.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  159.       mxf_write_generic_sound_desc },

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

  161.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },

  162.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

  163.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 },

  164.       mxf_write_cdci_desc },

  165.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },

  166.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  167.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  168.       mxf_write_generic_sound_desc },

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

  170.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },

  171.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

  172.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x06 },

  173.       mxf_write_cdci_desc },

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

  175.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

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

  177.       mxf_write_generic_sound_desc },

  178.     // DV Unknwon

  179.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x7F,0x01 },

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

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

  182.       mxf_write_cdci_desc },

  183.     // DV25 525/60

  184.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x40,0x01 },

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

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

  187.       mxf_write_cdci_desc },

  188.     // DV25 625/50

  189.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 },

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

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

  192.       mxf_write_cdci_desc },

  193.     // DV50 525/60

  194.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x50,0x01 },

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

  196.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x03,0x00 },

  197.       mxf_write_cdci_desc },

  198.     // DV50 625/50

  199.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x51,0x01 },

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

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

  202.       mxf_write_cdci_desc },

  203.     // DV100 1080/60

  204.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x60,0x01 },

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

  206.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x05,0x00 },

  207.       mxf_write_cdci_desc },

  208.     // DV100 1080/50

  209.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x61,0x01 },

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

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

  212.       mxf_write_cdci_desc },

  213.     // DV100 720/60

  214.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x62,0x01 },

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

  216.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x07,0x00 },

  217.       mxf_write_cdci_desc },

  218.     // DV100 720/50

  219.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x63,0x01 },

  220.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  221.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x08,0x00 },

  222.       mxf_write_cdci_desc },

  223.     // DNxHD 1080p 10bit high

  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,0x04,0x01,0x02,0x02,0x71,0x01,0x00,0x00 },

  227.       mxf_write_cdci_desc },

  228.     // DNxHD 1080p 8bit medium

  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,0x04,0x01,0x02,0x02,0x71,0x03,0x00,0x00 },

  232.       mxf_write_cdci_desc },

  233.     // DNxHD 1080p 8bit 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,0x04,0x01,0x02,0x02,0x71,0x04,0x00,0x00 },

  237.       mxf_write_cdci_desc },

  238.     // DNxHD 1080i 10bit high

  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,0x04,0x01,0x02,0x02,0x71,0x07,0x00,0x00 },

  242.       mxf_write_cdci_desc },

  243.     // DNxHD 1080i 8bit medium

  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,0x04,0x01,0x02,0x02,0x71,0x08,0x00,0x00 },

  247.       mxf_write_cdci_desc },

  248.     // DNxHD 1080i 8bit high

  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,0x04,0x01,0x02,0x02,0x71,0x09,0x00,0x00 },

  252.       mxf_write_cdci_desc },

  253.     // DNxHD 720p 10bit

  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,0x04,0x01,0x02,0x02,0x71,0x10,0x00,0x00 },

  257.       mxf_write_cdci_desc },

  258.     // DNxHD 720p 8bit high

  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,0x04,0x01,0x02,0x02,0x71,0x11,0x00,0x00 },

  262.       mxf_write_cdci_desc },

  263.     // DNxHD 720p 8bit medium

  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,0x04,0x01,0x02,0x02,0x71,0x12,0x00,0x00 },

  267.       mxf_write_cdci_desc },

  268.     // DNxHD 720p 8bit low

  269.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  270.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  271.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x13,0x00,0x00 },

  272.       mxf_write_cdci_desc },

  273.     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  274.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  275.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  276.       NULL },

  277. };

  278. 

  279. typedef struct MXFContext {

  280.     AVClass *av_class;

  281.     int64_t footer_partition_offset;

  282.     int essence_container_count;

  283.     AVRational time_base;

  284.     int header_written;

  285.     MXFIndexEntry *index_entries;

  286.     unsigned edit_units_count;

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

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

  289.     int last_indexed_edit_unit;

  290.     uint64_t *body_partition_offset;

  291.     unsigned body_partitions_count;

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

  293.     uint64_t duration;

  294.     AVTimecode tc;       ///< timecode context

  295.     AVStream *timecode_track;

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

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

  298.     uint64_t body_offset;

  299.     uint32_t instance_number;

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

  301. } MXFContext;

  302. 

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

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

  305. 

  306. /**

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

  308.  */

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

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

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

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

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

  314. 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

  315. 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

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

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

  318. 

  319. /**

  320.  * partial key for header metadata

  321.  */

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

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

  324. 

  325. /**

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

  327.  */

  328. static const MXFLocalTagPair mxf_local_tag_batch[] = {

  329.     // preface set

  330.     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */

  331.     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */

  332.     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */

  333.     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */

  334.     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */

  335.     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */

  336.     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */

  337.     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */

  338.     // Identification

  339.     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */

  340.     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */

  341.     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */

  342.     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */

  343.     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */

  344.     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */

  345.     // Content Storage

  346.     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */

  347.     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */

  348.     // Essence Container Data

  349.     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */

  350.     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */

  351.     // Package

  352.     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */

  353.     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */

  354.     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */

  355.     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */

  356.     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */

  357.     // Track

  358.     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */

  359.     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */

  360.     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */

  361.     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */

  362.     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */

  363.     // Sequence

  364.     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */

  365.     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */

  366.     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */

  367.     // Source Clip

  368.     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */

  369.     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */

  370.     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */

  371.     // Timecode Component

  372.     { 0x1501, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x05,0x00,0x00}}, /* Start Time Code */

  373.     { 0x1502, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x04,0x01,0x01,0x02,0x06,0x00,0x00}}, /* Rounded Time Code Base */

  374.     { 0x1503, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x04,0x01,0x01,0x05,0x00,0x00,0x00}}, /* Drop Frame */

  375.     // File Descriptor

  376.     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */

  377.     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */

  378.     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */

  379.     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */

  380.     // Generic Picture Essence Descriptor

  381.     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */

  382.     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */

  383.     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */

  384.     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */

  385.     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */

  386.     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */

  387.     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */

  388.     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */

  389.     { 0x3212, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x01,0x06,0x00,0x00,0x00}}, /* Field Dominance (Opt) */

  390.     // CDCI Picture Essence Descriptor

  391.     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */

  392.     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */

  393.     // Generic Sound Essence Descriptor

  394.     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */

  395.     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */

  396.     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */

  397.     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */

  398.     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */

  399.     // Index Table Segment

  400.     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */

  401.     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */

  402.     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */

  403.     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */

  404.     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */

  405.     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */

  406.     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */

  407.     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */

  408.     // MPEG video Descriptor

  409.     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */

  410.     { 0x8007, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0A,0x00,0x00}}, /* ProfileAndLevel */

  411.     // Wave Audio Essence Descriptor

  412.     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */

  413.     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */

  414. };

  415. 

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

  417. {

  418.     avio_write(pb, uuid_base, 12);

  419.     avio_wb16(pb, type);

  420.     avio_wb16(pb, value);

  421. }

  422. 

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

  424. {

  425.     MXFContext *mxf = s->priv_data;

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

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

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

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

  430. }

  431. 

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

  433. {

  434.     avio_wb32(pb, ref_count);

  435.     avio_wb32(pb, 16);

  436. }

  437. 

  438. static int klv_ber_length(uint64_t len)

  439. {

  440.     if (len < 128)

  441.         return 1;

  442.     else

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

  444. }

  445. 

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

  447. {

  448.     // Determine the best BER size

  449.     int size;

  450.     if (len < 128) {

  451.         //short form

  452.         avio_w8(pb, len);

  453.         return 1;

  454.     }

  455. 

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

  457. 

  458.     // long form

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

  460.     while(size) {

  461.         size--;

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

  463.     }

  464.     return 0;

  465. }

  466. 

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

  468. {

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

  470.     avio_wb24(pb, len);

  471. }

  472. 

  473. /*

  474.  * Get essence container ul index

  475.  */

  476. static int mxf_get_essence_container_ul_index(enum AVCodecID id)

  477. {

  478.     int i;

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

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

  481.             return mxf_essence_mappings[i].index;

  482.     return -1;

  483. }

  484. 

  485. static void mxf_write_primer_pack(AVFormatContext *s)

  486. {

  487.     AVIOContext *pb = s->pb;

  488.     int local_tag_number, i = 0;

  489. 

  490.     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);

  491. 

  492.     avio_write(pb, primer_pack_key, 16);

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

  494. 

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

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

  497. 

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

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

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

  501.     }

  502. }

  503. 

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

  505. {

  506.     avio_wb16(pb, tag);

  507.     avio_wb16(pb, size);

  508. }

  509. 

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

  511. {

  512.     avio_write(pb, header_metadata_key, 13);

  513.     avio_wb24(pb, value);

  514. }

  515. 

  516. static void mxf_free(AVFormatContext *s)

  517. {

  518.     int i;

  519. 

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

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

  522.         av_freep(&st->priv_data);

  523.     }

  524. }

  525. 

  526. static const MXFCodecUL *mxf_get_data_definition_ul(int type)

  527. {

  528.     const MXFCodecUL *uls = ff_mxf_data_definition_uls;

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

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

  531.             break;

  532.         uls++;

  533.     }

  534.     return uls;

  535. }

  536. 

  537. static void mxf_write_essence_container_refs(AVFormatContext *s)

  538. {

  539.     MXFContext *c = s->priv_data;

  540.     AVIOContext *pb = s->pb;

  541.     int i;

  542. 

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

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

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

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

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

  548.     }

  549. }

  550. 

  551. static void mxf_write_preface(AVFormatContext *s)

  552. {

  553.     MXFContext *mxf = s->priv_data;

  554.     AVIOContext *pb = s->pb;

  555. 

  556.     mxf_write_metadata_key(pb, 0x012f00);

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

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

  559. 

  560.     // write preface set uid

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

  562.     mxf_write_uuid(pb, Preface, 0);

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

  564. 

  565.     // last modified date

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

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

  568. 

  569.     // write version

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

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

  572. 

  573.     // write identification_refs

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

  575.     mxf_write_refs_count(pb, 1);

  576.     mxf_write_uuid(pb, Identification, 0);

  577. 

  578.     // write content_storage_refs

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

  580.     mxf_write_uuid(pb, ContentStorage, 0);

  581. 

  582.     // operational pattern

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

  584.     avio_write(pb, op1a_ul, 16);

  585. 

  586.     // write essence_container_refs

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

  588.     mxf_write_essence_container_refs(s);

  589. 

  590.     // write dm_scheme_refs

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

  592.     avio_wb64(pb, 0);

  593. }

  594. 

  595. /*

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

  597.  */

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

  599. {

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

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

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

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

  604. }

  605. 

  606. static void mxf_write_identification(AVFormatContext *s)

  607. {

  608.     MXFContext *mxf = s->priv_data;

  609.     AVIOContext *pb = s->pb;

  610.     const char *company = "FFmpeg";

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

  612.     const char *version;

  613.     int length;

  614. 

  615.     mxf_write_metadata_key(pb, 0x013000);

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

  617. 

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

  619.         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);

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

  621.     klv_encode_ber_length(pb, length);

  622. 

  623.     // write uid

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

  625.     mxf_write_uuid(pb, Identification, 0);

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

  627. 

  628.     // write generation uid

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

  630.     mxf_write_uuid(pb, Identification, 1);

  631. 

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

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

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

  635. 

  636.     // write product uid

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

  638.     mxf_write_uuid(pb, Identification, 2);

  639. 

  640.     // modification date

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

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

  643. }

  644. 

  645. static void mxf_write_content_storage(AVFormatContext *s)

  646. {

  647.     AVIOContext *pb = s->pb;

  648. 

  649.     mxf_write_metadata_key(pb, 0x011800);

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

  651.     klv_encode_ber_length(pb, 92);

  652. 

  653.     // write uid

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

  655.     mxf_write_uuid(pb, ContentStorage, 0);

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

  657. 

  658.     // write package reference

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

  660.     mxf_write_refs_count(pb, 2);

  661.     mxf_write_uuid(pb, MaterialPackage, 0);

  662.     mxf_write_uuid(pb, SourcePackage, 0);

  663. 

  664.     // write essence container data

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

  666.     mxf_write_refs_count(pb, 1);

  667.     mxf_write_uuid(pb, EssenceContainerData, 0);

  668. }

  669. 

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

  671. {

  672.     MXFContext *mxf = s->priv_data;

  673.     AVIOContext *pb = s->pb;

  674.     MXFStreamContext *sc = st->priv_data;

  675. 

  676.     mxf_write_metadata_key(pb, 0x013b00);

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

  678.     klv_encode_ber_length(pb, 80);

  679. 

  680.     // write track uid

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

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

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

  684. 

  685.     // write track id

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

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

  688. 

  689.     // write track number

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

  691.     if (type == MaterialPackage)

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

  693.     else

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

  695. 

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

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

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

  699. 

  700.     // write origin

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

  702.     avio_wb64(pb, 0);

  703. 

  704.     // write sequence refs

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

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

  707. }

  708. 

  709. 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 };

  710. 

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

  712. {

  713.     MXFContext *mxf = s->priv_data;

  714.     AVIOContext *pb = s->pb;

  715. 

  716.     // find data define uls

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

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

  719.         avio_write(pb, smpte_12m_timecode_track_data_ul, 16);

  720.     else {

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

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

  723.     }

  724. 

  725.     // write duration

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

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

  728. }

  729. 

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

  731. {

  732.     MXFContext *mxf = s->priv_data;

  733.     AVIOContext *pb = s->pb;

  734.     enum MXFMetadataSetType component;

  735. 

  736.     mxf_write_metadata_key(pb, 0x010f00);

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

  738.     klv_encode_ber_length(pb, 80);

  739. 

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

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

  742. 

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

  744.     mxf_write_common_fields(s, st);

  745. 

  746.     // write structural component

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

  748.     mxf_write_refs_count(pb, 1);

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

  750.         component = TimecodeComponent;

  751.     else

  752.         component = SourceClip;

  753.     if (type == SourcePackage)

  754.         component += TypeBottom;

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

  756. }

  757. 

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

  759. {

  760.     MXFContext *mxf = s->priv_data;

  761.     AVIOContext *pb = s->pb;

  762. 

  763.     mxf_write_metadata_key(pb, 0x011400);

  764.     klv_encode_ber_length(pb, 75);

  765. 

  766.     // UID

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

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

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

  770. 

  771.     mxf_write_common_fields(s, st);

  772. 

  773.     // Start Time Code

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

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

  776. 

  777.     // Rounded Time Code Base

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

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

  780. 

  781.     // Drop Frame

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

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

  784. }

  785. 

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

  787. {

  788.     AVIOContext *pb = s->pb;

  789.     int i;

  790. 

  791.     mxf_write_metadata_key(pb, 0x011100);

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

  793.     klv_encode_ber_length(pb, 108);

  794. 

  795.     // write uid

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

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

  798. 

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

  800.     mxf_write_common_fields(s, st);

  801. 

  802.     // write start_position

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

  804.     avio_wb64(pb, 0);

  805. 

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

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

  808.     if (type == SourcePackage) {

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

  810.             avio_wb64(pb, 0);

  811.     } else

  812.         mxf_write_umid(s, 1);

  813. 

  814.     // write source track id

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

  816.     if (type == SourcePackage)

  817.         avio_wb32(pb, 0);

  818.     else

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

  820. }

  821. 

  822. static void mxf_write_multi_descriptor(AVFormatContext *s)

  823. {

  824.     MXFContext *mxf = s->priv_data;

  825.     AVIOContext *pb = s->pb;

  826.     const uint8_t *ul;

  827.     int i;

  828. 

  829.     mxf_write_metadata_key(pb, 0x014400);

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

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

  832. 

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

  834.     mxf_write_uuid(pb, MultipleDescriptor, 0);

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

  836. 

  837.     // write sample rate

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

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

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

  841. 

  842.     // write essence container ul

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

  844.     if (mxf->essence_container_count > 1)

  845.         ul = multiple_desc_ul;

  846.     else {

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

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

  849.     }

  850.     avio_write(pb, ul, 16);

  851. 

  852.     // write sub descriptor refs

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

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

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

  856.         mxf_write_uuid(pb, SubDescriptor, i);

  857. }

  858. 

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

  860. {

  861.     MXFContext *mxf = s->priv_data;

  862.     MXFStreamContext *sc = st->priv_data;

  863.     AVIOContext *pb = s->pb;

  864. 

  865.     avio_write(pb, key, 16);

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

  867. 

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

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

  870. 

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

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

  873. 

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

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

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

  877. 

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

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

  880. }

  881. 

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

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

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

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

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

  887. 

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

  889. {

  890.     MXFStreamContext *sc = st->priv_data;

  891.     AVIOContext *pb = s->pb;

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

  893.     int display_height;

  894.     int f1, f2;

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

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

  897.         desc_size += 5;

  898. 

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

  900. 

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

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

  903. 

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

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

  906. 

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

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

  909. 

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

  911.         display_height = 576;

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

  913.         display_height = 486;

  914.     else

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

  916. 

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

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

  919. 

  920.     // component depth

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

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

  923. 

  924.     // horizontal subsampling

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

  926.     avio_wb32(pb, 2);

  927. 

  928.     // frame layout

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

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

  931. 

  932.     // video line map

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

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

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

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

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

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

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

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

  941.     }

  942. 

  943.     if (!sc->interlaced) {

  944.         f2  = 0;

  945.         f1 *= 2;

  946.     }

  947. 

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

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

  950.     avio_wb32(pb, 4);

  951.     avio_wb32(pb, f1);

  952.     if (sc->interlaced)

  953.         avio_wb32(pb, f2);

  954. 

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

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

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

  958. 

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

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

  961. 

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

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

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

  965.     }

  966. 

  967. }

  968. 

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

  970. {

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

  972. }

  973. 

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

  975. {

  976.     AVIOContext *pb = s->pb;

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

  978. 

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

  980. 

  981.     // bit rate

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

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

  984. 

  985.     // profile and level

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

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

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

  989.     avio_w8(pb, profile_and_level);

  990. }

  991. 

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

  993. {

  994.     AVIOContext *pb = s->pb;

  995. 

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

  997. 

  998.     // audio locked

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

  1000.     avio_w8(pb, 1);

  1001. 

  1002.     // write audio sampling rate

  1003.     mxf_write_local_tag(pb, 8, 0x3D03);

  1004.     avio_wb32(pb, st->codec->sample_rate);

  1005.     avio_wb32(pb, 1);

  1006. 

  1007.     mxf_write_local_tag(pb, 4, 0x3D07);

  1008.     avio_wb32(pb, st->codec->channels);

  1009. 

  1010.     mxf_write_local_tag(pb, 4, 0x3D01);

  1011.     avio_wb32(pb, av_get_bits_per_sample(st->codec->codec_id));

  1012. }

  1013. 

  1014. static void mxf_write_wav_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)

  1015. {

  1016.     AVIOContext *pb = s->pb;

  1017. 

  1018.     mxf_write_generic_sound_common(s, st, key, size+6+8);

  1019. 

  1020.     mxf_write_local_tag(pb, 2, 0x3D0A);

  1021.     avio_wb16(pb, st->codec->block_align);

  1022. 

  1023.     // avg bytes per sec

  1024.     mxf_write_local_tag(pb, 4, 0x3D09);

  1025.     avio_wb32(pb, st->codec->block_align*st->codec->sample_rate);

  1026. }

  1027. 

  1028. static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)

  1029. {

  1030.     mxf_write_wav_common(s, st, mxf_wav_descriptor_key, 0);

  1031. }

  1032. 

  1033. static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)

  1034. {

  1035.     mxf_write_wav_common(s, st, mxf_aes3_descriptor_key, 0);

  1036. }

  1037. 

  1038. static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st)

  1039. {

  1040.     mxf_write_generic_sound_common(s, st, mxf_generic_sound_descriptor_key, 0);

  1041. }

  1042. 

  1043. static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)

  1044. {

  1045.     MXFContext *mxf = s->priv_data;

  1046.     AVIOContext *pb = s->pb;

  1047.     int i, track_count = s->nb_streams+1;

  1048. 

  1049.     if (type == MaterialPackage) {

  1050.         mxf_write_metadata_key(pb, 0x013600);

  1051.         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);

  1052.         klv_encode_ber_length(pb, 92 + 16*track_count);

  1053.     } else {

  1054.         mxf_write_metadata_key(pb, 0x013700);

  1055.         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);

  1056.         klv_encode_ber_length(pb, 112 + 16*track_count); // 20 bytes length for descriptor reference

  1057.     }

  1058. 

  1059.     // write uid

  1060.     mxf_write_local_tag(pb, 16, 0x3C0A);

  1061.     mxf_write_uuid(pb, type, 0);

  1062.     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);

  1063.     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);

  1064. 

  1065.     // write package umid

  1066.     mxf_write_local_tag(pb, 32, 0x4401);

  1067.     mxf_write_umid(s, type == SourcePackage);

  1068.     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);

  1069. 

  1070.     // package creation date

  1071.     mxf_write_local_tag(pb, 8, 0x4405);

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

  1073. 

  1074.     // package modified date

  1075.     mxf_write_local_tag(pb, 8, 0x4404);

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

  1077. 

  1078.     // write track refs

  1079.     mxf_write_local_tag(pb, track_count*16 + 8, 0x4403);

  1080.     mxf_write_refs_count(pb, track_count);

  1081.     mxf_write_uuid(pb, type == MaterialPackage ? Track :

  1082.                    Track + TypeBottom, -1); // timecode track

  1083.     for (i = 0; i < s->nb_streams; i++)

  1084.         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);

  1085. 

  1086.     // write multiple descriptor reference

  1087.     if (type == SourcePackage) {

  1088.         mxf_write_local_tag(pb, 16, 0x4701);

  1089.         if (s->nb_streams > 1) {

  1090.             mxf_write_uuid(pb, MultipleDescriptor, 0);

  1091.             mxf_write_multi_descriptor(s);

  1092.         } else

  1093.             mxf_write_uuid(pb, SubDescriptor, 0);

  1094.     }

  1095. 

  1096.     // write timecode track

  1097.     mxf_write_track(s, mxf->timecode_track, type);

  1098.     mxf_write_sequence(s, mxf->timecode_track, type);

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

  1100. 

  1101.     for (i = 0; i < s->nb_streams; i++) {

  1102.         AVStream *st = s->streams[i];

  1103.         mxf_write_track(s, st, type);

  1104.         mxf_write_sequence(s, st, type);

  1105.         mxf_write_structural_component(s, st, type);

  1106. 

  1107.         if (type == SourcePackage) {

  1108.             MXFStreamContext *sc = st->priv_data;

  1109.             mxf_essence_container_uls[sc->index].write_desc(s, st);

  1110.         }

  1111.     }

  1112. }

  1113. 

  1114. static int mxf_write_essence_container_data(AVFormatContext *s)

  1115. {

  1116.     AVIOContext *pb = s->pb;

  1117. 

  1118.     mxf_write_metadata_key(pb, 0x012300);

  1119.     klv_encode_ber_length(pb, 72);

  1120. 

  1121.     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID

  1122.     mxf_write_uuid(pb, EssenceContainerData, 0);

  1123. 

  1124.     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID

  1125.     mxf_write_umid(s, 1);

  1126. 

  1127.     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID

  1128.     avio_wb32(pb, 1);

  1129. 

  1130.     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID

  1131.     avio_wb32(pb, 2);

  1132. 

  1133.     return 0;

  1134. }

  1135. 

  1136. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  1137. {

  1138.     mxf_write_preface(s);

  1139.     mxf_write_identification(s);

  1140.     mxf_write_content_storage(s);

  1141.     mxf_write_package(s, MaterialPackage);

  1142.     mxf_write_package(s, SourcePackage);

  1143.     mxf_write_essence_container_data(s);

  1144.     return 0;

  1145. }

  1146. 

  1147. static unsigned klv_fill_size(uint64_t size)

  1148. {

  1149.     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));

  1150.     if (pad < 20) // smallest fill item possible

  1151.         return pad + KAG_SIZE;

  1152.     else

  1153.         return pad & (KAG_SIZE-1);

  1154. }

  1155. 

  1156. static void mxf_write_index_table_segment(AVFormatContext *s)

  1157. {

  1158.     MXFContext *mxf = s->priv_data;

  1159.     AVIOContext *pb = s->pb;

  1160.     int i, j, temporal_reordering = 0;

  1161.     int key_index = mxf->last_key_index;

  1162. 

  1163.     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);

  1164. 

  1165.     if (!mxf->edit_units_count && !mxf->edit_unit_byte_count)

  1166.         return;

  1167. 

  1168.     avio_write(pb, index_table_segment_key, 16);

  1169. 

  1170.     if (mxf->edit_unit_byte_count) {

  1171.         klv_encode_ber_length(pb, 80);

  1172.     } else {

  1173.         klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1)*6 +

  1174.                               12+mxf->edit_units_count*(11+mxf->slice_count*4));

  1175.     }

  1176. 

  1177.     // instance id

  1178.     mxf_write_local_tag(pb, 16, 0x3C0A);

  1179.     mxf_write_uuid(pb, IndexTableSegment, 0);

  1180. 

  1181.     // index edit rate

  1182.     mxf_write_local_tag(pb, 8, 0x3F0B);

  1183.     avio_wb32(pb, mxf->time_base.den);

  1184.     avio_wb32(pb, mxf->time_base.num);

  1185. 

  1186.     // index start position

  1187.     mxf_write_local_tag(pb, 8, 0x3F0C);

  1188.     avio_wb64(pb, mxf->last_indexed_edit_unit);

  1189. 

  1190.     // index duration

  1191.     mxf_write_local_tag(pb, 8, 0x3F0D);

  1192.     if (mxf->edit_unit_byte_count)

  1193.         avio_wb64(pb, 0); // index table covers whole container

  1194.     else

  1195.         avio_wb64(pb, mxf->edit_units_count);

  1196. 

  1197.     // edit unit byte count

  1198.     mxf_write_local_tag(pb, 4, 0x3F05);

  1199.     avio_wb32(pb, mxf->edit_unit_byte_count);

  1200. 

  1201.     // index sid

  1202.     mxf_write_local_tag(pb, 4, 0x3F06);

  1203.     avio_wb32(pb, 2);

  1204. 

  1205.     // body sid

  1206.     mxf_write_local_tag(pb, 4, 0x3F07);

  1207.     avio_wb32(pb, 1);

  1208. 

  1209.     if (!mxf->edit_unit_byte_count) {

  1210.         // real slice count - 1

  1211.         mxf_write_local_tag(pb, 1, 0x3F08);

  1212.         avio_w8(pb, mxf->slice_count);

  1213. 

  1214.         // delta entry array

  1215.         mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);

  1216.         avio_wb32(pb, s->nb_streams+1); // num of entries

  1217.         avio_wb32(pb, 6);               // size of one entry

  1218.         // write system item delta entry

  1219.         avio_w8(pb, 0);

  1220.         avio_w8(pb, 0); // slice entry

  1221.         avio_wb32(pb, 0); // element delta

  1222.         for (i = 0; i < s->nb_streams; i++) {

  1223.             AVStream *st = s->streams[i];

  1224.             MXFStreamContext *sc = st->priv_data;

  1225.             avio_w8(pb, sc->temporal_reordering);

  1226.             if (sc->temporal_reordering)

  1227.                 temporal_reordering = 1;

  1228.             if (i == 0) { // video track

  1229.                 avio_w8(pb, 0); // slice number

  1230.                 avio_wb32(pb, KAG_SIZE); // system item size including klv fill

  1231.             } else { // audio track

  1232.                 unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;

  1233.                 audio_frame_size += klv_fill_size(audio_frame_size);

  1234.                 avio_w8(pb, 1);

  1235.                 avio_wb32(pb, (i-1)*audio_frame_size); // element delta

  1236.             }

  1237.         }

  1238. 

  1239.         mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);

  1240.         avio_wb32(pb, mxf->edit_units_count);  // num of entries

  1241.         avio_wb32(pb, 11+mxf->slice_count*4);  // size of one entry

  1242. 

  1243.         for (i = 0; i < mxf->edit_units_count; i++) {

  1244.             int temporal_offset = 0;

  1245. 

  1246.             if (!(mxf->index_entries[i].flags & 0x33)) { // I frame

  1247.                 mxf->last_key_index = key_index;

  1248.                 key_index = i;

  1249.             }

  1250. 

  1251.             if (temporal_reordering) {

  1252.                 int pic_num_in_gop = i - key_index;

  1253.                 if (pic_num_in_gop != mxf->index_entries[i].temporal_ref) {

  1254.                     for (j = key_index; j < mxf->edit_units_count; j++) {

  1255.                         if (pic_num_in_gop == mxf->index_entries[j].temporal_ref)

  1256.                             break;

  1257.                     }

  1258.                     if (j == mxf->edit_units_count)

  1259.                         av_log(s, AV_LOG_WARNING, "missing frames\n");

  1260.                     temporal_offset = j - key_index - pic_num_in_gop;

  1261.                 }

  1262.             }

  1263.             avio_w8(pb, temporal_offset);

  1264. 

  1265.             if ((mxf->index_entries[i].flags & 0x30) == 0x30) { // back and forward prediction

  1266.                 avio_w8(pb, mxf->last_key_index - i);

  1267.             } else {

  1268.                 avio_w8(pb, key_index - i); // key frame offset

  1269.                 if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward

  1270.                     mxf->last_key_index = key_index;

  1271.             }

  1272. 

  1273.             if (!(mxf->index_entries[i].flags & 0x33) && // I frame

  1274.                 mxf->index_entries[i].flags & 0x40 && !temporal_offset)

  1275.                 mxf->index_entries[i].flags |= 0x80; // random access

  1276.             avio_w8(pb, mxf->index_entries[i].flags);

  1277.             // stream offset

  1278.             avio_wb64(pb, mxf->index_entries[i].offset);

  1279.             if (s->nb_streams > 1)

  1280.                 avio_wb32(pb, mxf->index_entries[i].slice_offset);

  1281.         }

  1282. 

  1283.         mxf->last_key_index = key_index - mxf->edit_units_count;

  1284.         mxf->last_indexed_edit_unit += mxf->edit_units_count;

  1285.         mxf->edit_units_count = 0;

  1286.     }

  1287. }

  1288. 

  1289. static void mxf_write_klv_fill(AVFormatContext *s)

  1290. {

  1291.     unsigned pad = klv_fill_size(avio_tell(s->pb));

  1292.     if (pad) {

  1293.         avio_write(s->pb, klv_fill_key, 16);

  1294.         pad -= 16 + 4;

  1295.         klv_encode_ber4_length(s->pb, pad);

  1296.         for (; pad; pad--)

  1297.             avio_w8(s->pb, 0);

  1298.         av_assert1(!(avio_tell(s->pb) & (KAG_SIZE-1)));

  1299.     }

  1300. }

  1301. 

  1302. static void mxf_write_partition(AVFormatContext *s, int bodysid,

  1303.                                 int indexsid,

  1304.                                 const uint8_t *key, int write_metadata)

  1305. {

  1306.     MXFContext *mxf = s->priv_data;

  1307.     AVIOContext *pb = s->pb;

  1308.     int64_t header_byte_count_offset;

  1309.     unsigned index_byte_count = 0;

  1310.     uint64_t partition_offset = avio_tell(pb);

  1311. 

  1312.     if (!mxf->edit_unit_byte_count && mxf->edit_units_count)

  1313.         index_byte_count = 85 + 12+(s->nb_streams+1)*6 +

  1314.             12+mxf->edit_units_count*(11+mxf->slice_count*4);

  1315.     else if (mxf->edit_unit_byte_count && indexsid)

  1316.         index_byte_count = 80;

  1317. 

  1318.     if (index_byte_count) {

  1319.         // add encoded ber length

  1320.         index_byte_count += 16 + klv_ber_length(index_byte_count);

  1321.         index_byte_count += klv_fill_size(index_byte_count);

  1322.     }

  1323. 

  1324.     if (!memcmp(key, body_partition_key, 16)) {

  1325.         mxf->body_partition_offset =

  1326.             av_realloc(mxf->body_partition_offset,

  1327.                        (mxf->body_partitions_count+1)*

  1328.                        sizeof(*mxf->body_partition_offset));

  1329.         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;

  1330.     }

  1331. 

  1332.     // write klv

  1333.     avio_write(pb, key, 16);

  1334.     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);

  1335. 

  1336.     // write partition value

  1337.     avio_wb16(pb, 1); // majorVersion

  1338.     avio_wb16(pb, 2); // minorVersion

  1339.     avio_wb32(pb, KAG_SIZE); // KAGSize

  1340. 

  1341.     avio_wb64(pb, partition_offset); // ThisPartition

  1342. 

  1343.     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)

  1344.         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition

  1345.     else if (!memcmp(key, footer_partition_key, 16) && mxf->body_partitions_count)

  1346.         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition

  1347.     else

  1348.         avio_wb64(pb, 0);

  1349. 

  1350.     avio_wb64(pb, mxf->footer_partition_offset); // footerPartition

  1351. 

  1352.     // set offset

  1353.     header_byte_count_offset = avio_tell(pb);

  1354.     avio_wb64(pb, 0); // headerByteCount, update later

  1355. 

  1356.     // indexTable

  1357.     avio_wb64(pb, index_byte_count); // indexByteCount

  1358.     avio_wb32(pb, index_byte_count ? indexsid : 0); // indexSID

  1359. 

  1360.     // BodyOffset

  1361.     if (bodysid && mxf->edit_units_count && mxf->body_partitions_count) {

  1362.         avio_wb64(pb, mxf->body_offset);

  1363.     } else

  1364.         avio_wb64(pb, 0);

  1365. 

  1366.     avio_wb32(pb, bodysid); // bodySID

  1367. 

  1368.     // operational pattern

  1369.     avio_write(pb, op1a_ul, 16);

  1370. 

  1371.     // essence container

  1372.     mxf_write_essence_container_refs(s);

  1373. 

  1374.     if (write_metadata) {

  1375.         // mark the start of the headermetadata and calculate metadata size

  1376.         int64_t pos, start;

  1377.         unsigned header_byte_count;

  1378. 

  1379.         mxf_write_klv_fill(s);

  1380.         start = avio_tell(s->pb);

  1381.         mxf_write_primer_pack(s);

  1382.         mxf_write_header_metadata_sets(s);

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

  1384.         header_byte_count = pos - start + klv_fill_size(pos);

  1385. 

  1386.         // update header_byte_count

  1387.         avio_seek(pb, header_byte_count_offset, SEEK_SET);

  1388.         avio_wb64(pb, header_byte_count);

  1389.         avio_seek(pb, pos, SEEK_SET);

  1390.     }

  1391. 

  1392.     avio_flush(pb);

  1393. }

  1394. 

  1395. static int mxf_parse_dnxhd_frame(AVFormatContext *s, AVStream *st,

  1396. AVPacket *pkt)

  1397. {

  1398.     MXFContext *mxf = s->priv_data;

  1399.     MXFStreamContext *sc = st->priv_data;

  1400.     int i, cid;

  1401.     uint8_t* header_cid;

  1402.     unsigned int frame_size = 0;

  1403. 

  1404.     if (mxf->header_written)

  1405.         return 1;

  1406. 

  1407.     if (pkt->size < 43)

  1408.         return -1;

  1409. 

  1410.     header_cid = pkt->data + 0x28;

  1411.     cid = header_cid[0] << 24 | header_cid[1] << 16 | header_cid[2] << 8 | header_cid[3];

  1412. 

  1413.     if ((i = ff_dnxhd_get_cid_table(cid)) < 0)

  1414.         return -1;

  1415. 

  1416.     switch (cid) {

  1417.     case 1235:

  1418.         sc->index = 24;

  1419.         sc->component_depth = 10;

  1420.         break;

  1421.     case 1237:

  1422.         sc->index = 25;

  1423.         break;

  1424.     case 1238:

  1425.         sc->index = 26;

  1426.         break;

  1427.     case 1241:

  1428.         sc->index = 27;

  1429.         sc->component_depth = 10;

  1430.         break;

  1431.     case 1242:

  1432.         sc->index = 28;

  1433.         break;

  1434.     case 1243:

  1435.         sc->index = 29;

  1436.         break;

  1437.     case 1250:

  1438.         sc->index = 30;

  1439.         sc->component_depth = 10;

  1440.         break;

  1441.     case 1251:

  1442.         sc->index = 31;

  1443.         break;

  1444.     case 1252:

  1445.         sc->index = 32;

  1446.         break;

  1447.     case 1253:

  1448.         sc->index = 33;

  1449.         break;

  1450.     default:

  1451.         return -1;

  1452.     }

  1453. 

  1454.     frame_size = ff_dnxhd_cid_table[i].frame_size;

  1455.     sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;

  1456.     sc->aspect_ratio = (AVRational){ 16, 9 };

  1457. 

  1458.     mxf->edit_unit_byte_count = KAG_SIZE;

  1459.     for (i = 0; i < s->nb_streams; i++) {

  1460.         AVStream *st = s->streams[i];

  1461.         MXFStreamContext *sc = st->priv_data;

  1462.         if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

  1463.             mxf->edit_unit_byte_count += 16 + 4 + sc->aic.samples[0]*sc->aic.sample_size;

  1464.             mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1465.         } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  1466.             mxf->edit_unit_byte_count += 16 + 4 + frame_size;

  1467.             mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1468.         }

  1469.     }

  1470. 

  1471.     return 1;

  1472. }

  1473. 

  1474. static int mxf_parse_dv_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1475. {

  1476.     MXFContext *mxf = s->priv_data;

  1477.     MXFStreamContext *sc = st->priv_data;

  1478.     uint8_t *vs_pack, *vsc_pack;

  1479.     int i, ul_index, frame_size, stype, pal;

  1480. 

  1481.     if (mxf->header_written)

  1482.         return 1;

  1483. 

  1484.     // Check for minimal frame size

  1485.     if (pkt->size < 120000)

  1486.         return -1;

  1487. 

  1488.     vs_pack  = pkt->data + 80*5 + 48;

  1489.     vsc_pack = pkt->data + 80*5 + 53;

  1490.     stype    = vs_pack[3] & 0x1f;

  1491.     pal      = (vs_pack[3] >> 5) & 0x1;

  1492. 

  1493.     if ((vs_pack[2] & 0x07) == 0x02)

  1494.         sc->aspect_ratio = (AVRational){ 16, 9 };

  1495.     else

  1496.         sc->aspect_ratio = (AVRational){ 4, 3 };

  1497. 

  1498.     sc->interlaced = (vsc_pack[3] >> 4) & 0x01;

  1499.     // TODO: fix dv encoder to set proper FF/FS value in VSC pack

  1500.     // and set field dominance accordingly

  1501.     // av_log(s, AV_LOG_DEBUG, "DV vsc pack ff/ss = %x\n", vsc_pack[2] >> 6);

  1502. 

  1503.     switch (stype) {

  1504.     case 0x18: // DV100 720p

  1505.         ul_index = 6 + pal;

  1506.         frame_size = pal ? 288000 : 240000;

  1507.         if (sc->interlaced) {

  1508.             av_log(s, AV_LOG_ERROR, "source marked as interlaced but codec profile is progressive");

  1509.             sc->interlaced = 0;

  1510.         }

  1511.         break;

  1512.     case 0x14: // DV100 1080i

  1513.         ul_index = 4 + pal;

  1514.         frame_size = pal ? 576000 : 480000;

  1515.         break;

  1516.     case 0x04: // DV50

  1517.         ul_index = 2 + pal;

  1518.         frame_size = pal ? 288000 : 240000;

  1519.         break;

  1520.     default: // DV25

  1521.         ul_index = 0 + pal;

  1522.         frame_size = pal ? 144000 : 120000;

  1523.     }

  1524. 

  1525.     sc->index = ul_index + 16;

  1526.     sc->codec_ul =  &mxf_essence_container_uls[sc->index].codec_ul;

  1527. 

  1528.     mxf->edit_unit_byte_count = KAG_SIZE;

  1529.     for (i = 0; i < s->nb_streams; i++) {

  1530.         AVStream *st = s->streams[i];

  1531.         MXFStreamContext *sc = st->priv_data;

  1532.         if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

  1533.             mxf->edit_unit_byte_count += 16 + 4 + sc->aic.samples[0]*sc->aic.sample_size;

  1534.             mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1535.         } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  1536.             mxf->edit_unit_byte_count += 16 + 4 + frame_size;

  1537.             mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1538.         }

  1539.     }

  1540. 

  1541.     return 1;

  1542. }

  1543. 

  1544. static const UID mxf_mpeg2_codec_uls[] = {

  1545.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame

  1546.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP

  1547.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame

  1548.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP

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

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

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

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

  1553.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x05,0x02,0x00 }, // MP@H-14 I-Frame

  1554.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x05,0x03,0x00 }, // MP@H-14 Long GOP

  1555. };

  1556. 

  1557. static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)

  1558. {

  1559.     int long_gop = avctx->gop_size > 1 || avctx->has_b_frames;

  1560. 

  1561.     if (avctx->profile == 4) { // Main

  1562.         if (avctx->level == 8) // Main

  1563.             return &mxf_mpeg2_codec_uls[0+long_gop];

  1564.         else if (avctx->level == 4) // High

  1565.             return &mxf_mpeg2_codec_uls[4+long_gop];

  1566.         else if (avctx->level == 6) // High 14

  1567.             return &mxf_mpeg2_codec_uls[8+long_gop];

  1568.     } else if (avctx->profile == 0) { // 422

  1569.         if (avctx->level == 5) // Main

  1570.             return &mxf_mpeg2_codec_uls[2+long_gop];

  1571.         else if (avctx->level == 2) // High

  1572.             return &mxf_mpeg2_codec_uls[6+long_gop];

  1573.     }

  1574.     return NULL;

  1575. }

  1576. 

  1577. static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st,

  1578.                                  AVPacket *pkt, MXFIndexEntry *e)

  1579. {

  1580.     MXFStreamContext *sc = st->priv_data;

  1581.     uint32_t c = -1;

  1582.     int i;

  1583. 

  1584.     for(i = 0; i < pkt->size - 4; i++) {

  1585.         c = (c<<8) + pkt->data[i];

  1586.         if (c == 0x1b5) {

  1587.             if ((pkt->data[i+1] & 0xf0) == 0x10) { // seq ext

  1588.                 st->codec->profile = pkt->data[i+1] & 0x07;

  1589.                 st->codec->level   = pkt->data[i+2] >> 4;

  1590.             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext

  1591.                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame

  1592.                 if (sc->interlaced)

  1593.                     sc->field_dominance = 1 + !(pkt->data[i+4] & 0x80); // top field first

  1594.                 break;

  1595.             }

  1596.         } else if (c == 0x1b8) { // gop

  1597.             if (pkt->data[i+4]>>6 & 0x01) { // closed

  1598.                 sc->closed_gop = 1;

  1599.                 if (e->flags & 0x40) // sequence header present

  1600.                     e->flags |= 0x80; // random access

  1601.             }

  1602.         } else if (c == 0x1b3) { // seq

  1603.             e->flags |= 0x40;

  1604.             switch ((pkt->data[i+4]>>4) & 0xf) {

  1605.             case 2:  sc->aspect_ratio = (AVRational){  4,  3}; break;

  1606.             case 3:  sc->aspect_ratio = (AVRational){ 16,  9}; break;

  1607.             case 4:  sc->aspect_ratio = (AVRational){221,100}; break;

  1608.             default:

  1609.                 av_reduce(&sc->aspect_ratio.num, &sc->aspect_ratio.den,

  1610.                           st->codec->width, st->codec->height, 1024*1024);

  1611.             }

  1612.         } else if (c == 0x100) { // pic

  1613.             int pict_type = (pkt->data[i+2]>>3) & 0x07;

  1614.             e->temporal_ref = (pkt->data[i+1]<<2) | (pkt->data[i+2]>>6);

  1615.             if (pict_type == 2) { // P frame

  1616.                 e->flags |= 0x22;

  1617.                 sc->closed_gop = 0; // reset closed gop, don't matter anymore

  1618.             } else if (pict_type == 3) { // B frame

  1619.                 if (sc->closed_gop)

  1620.                     e->flags |= 0x13; // only backward prediction

  1621.                 else

  1622.                     e->flags |= 0x33;

  1623.                 sc->temporal_reordering = -1;

  1624.             } else if (!pict_type) {

  1625.                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");

  1626.                 return 0;

  1627.             }

  1628.         }

  1629.     }

  1630.     if (s->oformat != &ff_mxf_d10_muxer)

  1631.         sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);

  1632.     return !!sc->codec_ul;

  1633. }

  1634. 

  1635. static uint64_t mxf_parse_timestamp(time_t timestamp)

  1636. {

  1637.     struct tm *time = gmtime(&timestamp);

  1638.     if (!time)

  1639.         return 0;

  1640.     return (uint64_t)(time->tm_year+1900) << 48 |

  1641.            (uint64_t)(time->tm_mon+1)     << 40 |

  1642.            (uint64_t) time->tm_mday       << 32 |

  1643.                       time->tm_hour       << 24 |

  1644.                       time->tm_min        << 16 |

  1645.                       time->tm_sec        << 8;

  1646. }

  1647. 

  1648. static void mxf_gen_umid(AVFormatContext *s)

  1649. {

  1650.     MXFContext *mxf = s->priv_data;

  1651.     uint32_t seed = av_get_random_seed();

  1652.     uint64_t umid = seed + 0x5294713400000000LL;

  1653. 

  1654.     AV_WB64(mxf->umid  , umid);

  1655.     AV_WB64(mxf->umid+8, umid>>8);

  1656. 

  1657.     mxf->instance_number = seed;

  1658. }

  1659. 

  1660. static int mxf_write_header(AVFormatContext *s)

  1661. {

  1662.     MXFContext *mxf = s->priv_data;

  1663.     int i, ret;

  1664.     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};

  1665.     const int *samples_per_frame = NULL;

  1666.     AVDictionaryEntry *t;

  1667.     int64_t timestamp = 0;

  1668.     AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0);

  1669. 

  1670.     if (!s->nb_streams)

  1671.         return -1;

  1672. 

  1673.     for (i = 0; i < s->nb_streams; i++) {

  1674.         AVStream *st = s->streams[i];

  1675.         MXFStreamContext *sc = av_mallocz(sizeof(*sc));

  1676.         if (!sc)

  1677.             return AVERROR(ENOMEM);

  1678.         st->priv_data = sc;

  1679. 

  1680.         if ((i == 0) ^ (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)) {

  1681.             av_log(s, AV_LOG_ERROR, "there must be exactly one video stream and it must be the first one\n");

  1682.             return -1;

  1683.         }

  1684. 

  1685.         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  1686.             AVRational rate, tbc = st->codec->time_base;

  1687.             // Default component depth to 8

  1688.             sc->component_depth = 8;

  1689.             mxf->timecode_base = (tbc.den + tbc.num/2) / tbc.num;

  1690.             switch (mxf->timecode_base) {

  1691.             case 25:

  1692.                 samples_per_frame = PAL_samples_per_frame;

  1693.                 mxf->time_base = (AVRational){ 1, 25 };

  1694.                 break;

  1695.             case 50:

  1696.                 samples_per_frame = PAL_50_samples_per_frame;

  1697.                 mxf->time_base = (AVRational){ 1, 50 };

  1698.                 break;

  1699.             case 30:

  1700.                 samples_per_frame = NTSC_samples_per_frame;

  1701.                 mxf->time_base = (AVRational){ 1001, 30000 };

  1702.                 break;

  1703.             case 60:

  1704.                 samples_per_frame = NTSC_60_samples_per_frame;

  1705.                 mxf->time_base = (AVRational){ 1001, 60000 };

  1706.                 break;

  1707.             default:

  1708.                 av_log(s, AV_LOG_ERROR, "Unsupported video frame rate %d/%d\n",

  1709.                        tbc.den, tbc.num);

  1710.                 return AVERROR(EINVAL);

  1711.             }

  1712.             rate = av_inv_q(mxf->time_base);

  1713.             avpriv_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);

  1714.             if (!tcr)

  1715.                 tcr = av_dict_get(st->metadata, "timecode", NULL, 0);

  1716.             if (tcr)

  1717.                 ret = av_timecode_init_from_string(&mxf->tc, rate, tcr->value, s);

  1718.             else

  1719.                 ret = av_timecode_init(&mxf->tc, rate, 0, 0, s);

  1720.             if (ret < 0)

  1721.                 return ret;

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

  1723.                 if (st->codec->bit_rate == 50000000)

  1724.                     if (mxf->time_base.den == 25) sc->index = 3;

  1725.                     else                          sc->index = 5;

  1726.                 else if (st->codec->bit_rate == 40000000)

  1727.                     if (mxf->time_base.den == 25) sc->index = 7;

  1728.                     else                          sc->index = 9;

  1729.                 else if (st->codec->bit_rate == 30000000)

  1730.                     if (mxf->time_base.den == 25) sc->index = 11;

  1731.                     else                          sc->index = 13;

  1732.                 else {

  1733.                     av_log(s, AV_LOG_ERROR, "error MXF D-10 only support 30/40/50 mbit/s\n");

  1734.                     return -1;

  1735.                 }

  1736. 

  1737.                 mxf->edit_unit_byte_count = KAG_SIZE; // system element

  1738.                 mxf->edit_unit_byte_count += 16 + 4 + (uint64_t)st->codec->bit_rate *

  1739.                     mxf->time_base.num / (8*mxf->time_base.den);

  1740.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1741.                 mxf->edit_unit_byte_count += 16 + 4 + 4 + samples_per_frame[0]*8*4;

  1742.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1743.             }

  1744.         } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

  1745.             if (st->codec->sample_rate != 48000) {

  1746.                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");

  1747.                 return -1;

  1748.             }

  1749.             avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);

  1750.             if (s->oformat == &ff_mxf_d10_muxer) {

  1751.                 if (st->index != 1) {

  1752.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support one audio track\n");

  1753.                     return -1;

  1754.                 }

  1755.                 if (st->codec->codec_id != AV_CODEC_ID_PCM_S16LE &&

  1756.                     st->codec->codec_id != AV_CODEC_ID_PCM_S24LE) {

  1757.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support 16 or 24 bits le audio\n");

  1758.                 }

  1759.                 sc->index = ((MXFStreamContext*)s->streams[0]->priv_data)->index + 1;

  1760.             } else

  1761.             mxf->slice_count = 1;

  1762.         }

  1763. 

  1764.         if (!sc->index) {

  1765.             sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);

  1766.             if (sc->index == -1) {

  1767.                 av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "

  1768.                        "codec not currently supported in container\n", i);

  1769.                 return -1;

  1770.             }

  1771.         }

  1772. 

  1773.         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;

  1774. 

  1775.         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);

  1776.         sc->track_essence_element_key[15] = present[sc->index];

  1777.         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);

  1778. 

  1779.         if (!present[sc->index])

  1780.             mxf->essence_container_count++;

  1781.         present[sc->index]++;

  1782.     }

  1783. 

  1784.     if (s->oformat == &ff_mxf_d10_muxer) {

  1785.         mxf->essence_container_count = 1;

  1786.     }

  1787. 

  1788.     if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))

  1789.         mxf_gen_umid(s);

  1790. 

  1791.     for (i = 0; i < s->nb_streams; i++) {

  1792.         MXFStreamContext *sc = s->streams[i]->priv_data;

  1793.         // update element count

  1794.         sc->track_essence_element_key[13] = present[sc->index];

  1795.         if (!memcmp(sc->track_essence_element_key, mxf_essence_container_uls[15].element_ul, 13)) // DV

  1796.             sc->order = (0x15 << 24) | AV_RB32(sc->track_essence_element_key+13);

  1797.         else

  1798.             sc->order = AV_RB32(sc->track_essence_element_key+12);

  1799.     }

  1800. 

  1801.     if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))

  1802.         timestamp = ff_iso8601_to_unix_time(t->value);

  1803.     if (timestamp)

  1804.         mxf->timestamp = mxf_parse_timestamp(timestamp);

  1805.     mxf->duration = -1;

  1806. 

  1807.     mxf->timecode_track = av_mallocz(sizeof(*mxf->timecode_track));

  1808.     if (!mxf->timecode_track)

  1809.         return AVERROR(ENOMEM);

  1810.     mxf->timecode_track->priv_data = av_mallocz(sizeof(MXFStreamContext));

  1811.     if (!mxf->timecode_track->priv_data)

  1812.         return AVERROR(ENOMEM);

  1813.     mxf->timecode_track->index = -1;

  1814. 

  1815.     if (!samples_per_frame)

  1816.         samples_per_frame = PAL_samples_per_frame;

  1817. 

  1818.     if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)

  1819.         return -1;

  1820. 

  1821.     return 0;

  1822. }

  1823. 

  1824. static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };

  1825. 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 };

  1826. 

  1827. static void mxf_write_system_item(AVFormatContext *s)

  1828. {

  1829.     MXFContext *mxf = s->priv_data;

  1830.     AVIOContext *pb = s->pb;

  1831.     unsigned frame;

  1832.     uint32_t time_code;

  1833. 

  1834.     frame = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  1835. 

  1836.     // write system metadata pack

  1837.     avio_write(pb, system_metadata_pack_key, 16);

  1838.     klv_encode_ber4_length(pb, 57);

  1839.     avio_w8(pb, 0x5c); // UL, user date/time stamp, picture and sound item present

  1840.     avio_w8(pb, 0x04); // content package rate

  1841.     avio_w8(pb, 0x00); // content package type

  1842.     avio_wb16(pb, 0x00); // channel handle

  1843.     avio_wb16(pb, mxf->tc.start + frame); // continuity count

  1844.     if (mxf->essence_container_count > 1)

  1845.         avio_write(pb, multiple_desc_ul, 16);

  1846.     else {

  1847.         MXFStreamContext *sc = s->streams[0]->priv_data;

  1848.         avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);

  1849.     }

  1850.     avio_w8(pb, 0);

  1851.     avio_wb64(pb, 0);

  1852.     avio_wb64(pb, 0); // creation date/time stamp

  1853. 

  1854.     avio_w8(pb, 0x81); // SMPTE 12M time code

  1855.     time_code = av_timecode_get_smpte_from_framenum(&mxf->tc, frame);

  1856.     avio_wb32(pb, time_code);

  1857.     avio_wb32(pb, 0); // binary group data

  1858.     avio_wb64(pb, 0);

  1859. 

  1860.     // write system metadata package set

  1861.     avio_write(pb, system_metadata_package_set_key, 16);

  1862.     klv_encode_ber4_length(pb, 35);

  1863.     avio_w8(pb, 0x83); // UMID

  1864.     avio_wb16(pb, 0x20);

  1865.     mxf_write_umid(s, 1);

  1866. }

  1867. 

  1868. static void mxf_write_d10_video_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1869. {

  1870.     MXFContext *mxf = s->priv_data;

  1871.     AVIOContext *pb = s->pb;

  1872.     int packet_size = (uint64_t)st->codec->bit_rate*mxf->time_base.num /

  1873.         (8*mxf->time_base.den); // frame size

  1874.     int pad;

  1875. 

  1876.     packet_size += 16 + 4;

  1877.     packet_size += klv_fill_size(packet_size);

  1878. 

  1879.     klv_encode_ber4_length(pb, pkt->size);

  1880.     avio_write(pb, pkt->data, pkt->size);

  1881. 

  1882.     // ensure CBR muxing by padding to correct video frame size

  1883.     pad = packet_size - pkt->size - 16 - 4;

  1884.     if (pad > 20) {

  1885.         avio_write(s->pb, klv_fill_key, 16);

  1886.         pad -= 16 + 4;

  1887.         klv_encode_ber4_length(s->pb, pad);

  1888.         for (; pad; pad--)

  1889.             avio_w8(s->pb, 0);

  1890.         av_assert1(!(avio_tell(s->pb) & (KAG_SIZE-1)));

  1891.     } else {

  1892.         av_log(s, AV_LOG_WARNING, "cannot fill d-10 video packet\n");

  1893.         for (; pad > 0; pad--)

  1894.             avio_w8(s->pb, 0);

  1895.     }

  1896. }

  1897. 

  1898. static void mxf_write_d10_audio_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1899. {

  1900.     MXFContext *mxf = s->priv_data;

  1901.     AVIOContext *pb = s->pb;

  1902.     int frame_size = pkt->size / st->codec->block_align;

  1903.     uint8_t *samples = pkt->data;

  1904.     uint8_t *end = pkt->data + pkt->size;

  1905.     int i;

  1906. 

  1907.     klv_encode_ber4_length(pb, 4 + frame_size*4*8);

  1908. 

  1909.     avio_w8(pb, (frame_size == 1920 ? 0 : (mxf->edit_units_count-1) % 5 + 1));

  1910.     avio_wl16(pb, frame_size);

  1911.     avio_w8(pb, (1<<st->codec->channels)-1);

  1912. 

  1913.     while (samples < end) {

  1914.         for (i = 0; i < st->codec->channels; i++) {

  1915.             uint32_t sample;

  1916.             if (st->codec->codec_id == AV_CODEC_ID_PCM_S24LE) {

  1917.                 sample = AV_RL24(samples)<< 4;

  1918.                 samples += 3;

  1919.             } else {

  1920.                 sample = AV_RL16(samples)<<12;

  1921.                 samples += 2;

  1922.             }

  1923.             avio_wl32(pb, sample | i);

  1924.         }

  1925.         for (; i < 8; i++)

  1926.             avio_wl32(pb, i);

  1927.     }

  1928. }

  1929. 

  1930. static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)

  1931. {

  1932.     MXFContext *mxf = s->priv_data;

  1933.     AVIOContext *pb = s->pb;

  1934.     AVStream *st = s->streams[pkt->stream_index];

  1935.     MXFStreamContext *sc = st->priv_data;

  1936.     MXFIndexEntry ie = {0};

  1937. 

  1938.     if (!mxf->edit_unit_byte_count && !(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {

  1939.         mxf->index_entries = av_realloc(mxf->index_entries,

  1940.             (mxf->edit_units_count + EDIT_UNITS_PER_BODY)*sizeof(*mxf->index_entries));

  1941.         if (!mxf->index_entries) {

  1942.             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");

  1943.             return -1;

  1944.         }

  1945.     }

  1946. 

  1947.     if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO) {

  1948.         if (!mxf_parse_mpeg2_frame(s, st, pkt, &ie)) {

  1949.             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");

  1950.             return -1;

  1951.         }

  1952.     } else if (st->codec->codec_id == AV_CODEC_ID_DNXHD) {

  1953.         if (!mxf_parse_dnxhd_frame(s, st, pkt)) {

  1954.             av_log(s, AV_LOG_ERROR, "could not get dnxhd profile\n");

  1955.             return -1;

  1956.         }

  1957.     } else if (st->codec->codec_id == AV_CODEC_ID_DVVIDEO) {

  1958.         if (!mxf_parse_dv_frame(s, st, pkt)) {

  1959.             av_log(s, AV_LOG_ERROR, "could not get dv profile\n");

  1960.             return -1;

  1961.         }

  1962.     }

  1963. 

  1964.     if (!mxf->header_written) {

  1965.         if (mxf->edit_unit_byte_count) {

  1966.             mxf_write_partition(s, 1, 2, header_open_partition_key, 1);

  1967.             mxf_write_klv_fill(s);

  1968.             mxf_write_index_table_segment(s);

  1969.         } else {

  1970.             mxf_write_partition(s, 0, 0, header_open_partition_key, 1);

  1971.         }

  1972.         mxf->header_written = 1;

  1973.     }

  1974. 

  1975.     if (st->index == 0) {

  1976.         if (!mxf->edit_unit_byte_count &&

  1977.             (!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&

  1978.             !(ie.flags & 0x33)) { // I frame, Gop start

  1979.             mxf_write_klv_fill(s);

  1980.             mxf_write_partition(s, 1, 2, body_partition_key, 0);

  1981. 

  1982.             mxf_write_klv_fill(s);

  1983.             mxf_write_index_table_segment(s);

  1984.         }

  1985. 

  1986.         mxf_write_klv_fill(s);

  1987.         mxf_write_system_item(s);

  1988. 

  1989.         if (!mxf->edit_unit_byte_count) {

  1990.             mxf->index_entries[mxf->edit_units_count].offset = mxf->body_offset;

  1991.             mxf->index_entries[mxf->edit_units_count].flags = ie.flags;

  1992.             mxf->index_entries[mxf->edit_units_count].temporal_ref = ie.temporal_ref;

  1993.             mxf->body_offset += KAG_SIZE; // size of system element

  1994.         }

  1995.         mxf->edit_units_count++;

  1996.     } else if (!mxf->edit_unit_byte_count && st->index == 1) {

  1997.         mxf->index_entries[mxf->edit_units_count-1].slice_offset =

  1998.             mxf->body_offset - mxf->index_entries[mxf->edit_units_count-1].offset;

  1999.     }

  2000. 

  2001.     mxf_write_klv_fill(s);

  2002.     avio_write(pb, sc->track_essence_element_key, 16); // write key

  2003.     if (s->oformat == &ff_mxf_d10_muxer) {

  2004.         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)

  2005.             mxf_write_d10_video_packet(s, st, pkt);

  2006.         else

  2007.             mxf_write_d10_audio_packet(s, st, pkt);

  2008.     } else {

  2009.         klv_encode_ber4_length(pb, pkt->size); // write length

  2010.         avio_write(pb, pkt->data, pkt->size);

  2011.         mxf->body_offset += 16+4+pkt->size + klv_fill_size(16+4+pkt->size);

  2012.     }

  2013. 

  2014.     avio_flush(pb);

  2015. 

  2016.     return 0;

  2017. }

  2018. 

  2019. static void mxf_write_random_index_pack(AVFormatContext *s)

  2020. {

  2021.     MXFContext *mxf = s->priv_data;

  2022.     AVIOContext *pb = s->pb;

  2023.     uint64_t pos = avio_tell(pb);

  2024.     int i;

  2025. 

  2026.     avio_write(pb, random_index_pack_key, 16);

  2027.     klv_encode_ber_length(pb, 28 + 12*mxf->body_partitions_count);

  2028. 

  2029.     if (mxf->edit_unit_byte_count)

  2030.         avio_wb32(pb, 1); // BodySID of header partition

  2031.     else

  2032.         avio_wb32(pb, 0);

  2033.     avio_wb64(pb, 0); // offset of header partition

  2034. 

  2035.     for (i = 0; i < mxf->body_partitions_count; i++) {

  2036.         avio_wb32(pb, 1); // BodySID

  2037.         avio_wb64(pb, mxf->body_partition_offset[i]);

  2038.     }

  2039. 

  2040.     avio_wb32(pb, 0); // BodySID of footer partition

  2041.     avio_wb64(pb, mxf->footer_partition_offset);

  2042. 

  2043.     avio_wb32(pb, avio_tell(pb) - pos + 4);

  2044. }

  2045. 

  2046. static int mxf_write_footer(AVFormatContext *s)

  2047. {

  2048.     MXFContext *mxf = s->priv_data;

  2049.     AVIOContext *pb = s->pb;

  2050. 

  2051.     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  2052. 

  2053.     mxf_write_klv_fill(s);

  2054.     mxf->footer_partition_offset = avio_tell(pb);

  2055.     if (mxf->edit_unit_byte_count) { // no need to repeat index

  2056.         mxf_write_partition(s, 0, 0, footer_partition_key, 0);

  2057.     } else {

  2058.         mxf_write_partition(s, 0, 2, footer_partition_key, 0);

  2059. 

  2060.         mxf_write_klv_fill(s);

  2061.         mxf_write_index_table_segment(s);

  2062.     }

  2063. 

  2064.     mxf_write_klv_fill(s);

  2065.     mxf_write_random_index_pack(s);

  2066. 

  2067.     if (s->pb->seekable) {

  2068.         avio_seek(pb, 0, SEEK_SET);

  2069.         if (mxf->edit_unit_byte_count) {

  2070.             mxf_write_partition(s, 1, 2, header_closed_partition_key, 1);

  2071.             mxf_write_klv_fill(s);

  2072.             mxf_write_index_table_segment(s);

  2073.         } else {

  2074.             mxf_write_partition(s, 0, 0, header_closed_partition_key, 1);

  2075.         }

  2076.     }

  2077. 

  2078.     avio_flush(pb);

  2079. 

  2080.     ff_audio_interleave_close(s);

  2081. 

  2082.     av_freep(&mxf->index_entries);

  2083.     av_freep(&mxf->body_partition_offset);

  2084.     av_freep(&mxf->timecode_track->priv_data);

  2085.     av_freep(&mxf->timecode_track);

  2086. 

  2087.     mxf_free(s);

  2088. 

  2089.     return 0;

  2090. }

  2091. 

  2092. static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  2093. {

  2094.     int i, stream_count = 0;

  2095. 

  2096.     for (i = 0; i < s->nb_streams; i++)

  2097.         stream_count += !!s->streams[i]->last_in_packet_buffer;

  2098. 

  2099.     if (stream_count && (s->nb_streams == stream_count || flush)) {

  2100.         AVPacketList *pktl = s->packet_buffer;

  2101.         if (s->nb_streams != stream_count) {

  2102.             AVPacketList *last = NULL;

  2103.             // find last packet in edit unit

  2104.             while (pktl) {

  2105.                 if (!stream_count || pktl->pkt.stream_index == 0)

  2106.                     break;

  2107.                 last = pktl;

  2108.                 pktl = pktl->next;

  2109.                 stream_count--;

  2110.             }

  2111.             // purge packet queue

  2112.             while (pktl) {

  2113.                 AVPacketList *next = pktl->next;

  2114. 

  2115.                 if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)

  2116.                     s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;

  2117.                 av_free_packet(&pktl->pkt);

  2118.                 av_freep(&pktl);

  2119.                 pktl = next;

  2120.             }

  2121.             if (last)

  2122.                 last->next = NULL;

  2123.             else {

  2124.                 s->packet_buffer = NULL;

  2125.                 s->packet_buffer_end= NULL;

  2126.                 goto out;

  2127.             }

  2128.             pktl = s->packet_buffer;

  2129.         }

  2130. 

  2131.         *out = pktl->pkt;

  2132.         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);

  2133.         s->packet_buffer = pktl->next;

  2134.         if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)

  2135.             s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;

  2136.         if(!s->packet_buffer)

  2137.             s->packet_buffer_end= NULL;

  2138.         av_freep(&pktl);

  2139.         return 1;

  2140.     } else {

  2141.     out:

  2142.         av_init_packet(out);

  2143.         return 0;

  2144.     }

  2145. }

  2146. 

  2147. static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)

  2148. {

  2149.     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;

  2150.     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;

  2151. 

  2152.     return next->dts > pkt->dts ||

  2153.         (next->dts == pkt->dts && sc->order < sc2->order);

  2154. }

  2155. 

  2156. static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  2157. {

  2158.     return ff_audio_rechunk_interleave(s, out, pkt, flush,

  2159.                                mxf_interleave_get_packet, mxf_compare_timestamps);

  2160. }

  2161. 

  2162. AVOutputFormat ff_mxf_muxer = {

  2163.     .name              = "mxf",

  2164.     .long_name         = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),

  2165.     .mime_type         = "application/mxf",

  2166.     .extensions        = "mxf",

  2167.     .priv_data_size    = sizeof(MXFContext),

  2168.     .audio_codec       = AV_CODEC_ID_PCM_S16LE,

  2169.     .video_codec       = AV_CODEC_ID_MPEG2VIDEO,

  2170.     .write_header      = mxf_write_header,

  2171.     .write_packet      = mxf_write_packet,

  2172.     .write_trailer     = mxf_write_footer,

  2173.     .flags             = AVFMT_NOTIMESTAMPS,

  2174.     .interleave_packet = mxf_interleave,

  2175. };

  2176. 

  2177. AVOutputFormat ff_mxf_d10_muxer = {

  2178.     .name              = "mxf_d10",

  2179.     .long_name         = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format) D-10 Mapping"),

  2180.     .mime_type         = "application/mxf",

  2181.     .priv_data_size    = sizeof(MXFContext),

  2182.     .audio_codec       = AV_CODEC_ID_PCM_S16LE,

  2183.     .video_codec       = AV_CODEC_ID_MPEG2VIDEO,

  2184.     .write_header      = mxf_write_header,

  2185.     .write_packet      = mxf_write_packet,

  2186.     .write_trailer     = mxf_write_footer,

  2187.     .flags             = AVFMT_NOTIMESTAMPS,

  2188.     .interleave_packet = mxf_interleave,

  2189. };