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FFmpeg/libavformat/mxfenc.c

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  1. /*

  2.  * MXF muxer

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

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

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

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

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

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

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

  12.  *

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

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

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

  16.  * Lesser General Public License for more details.

  17.  *

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

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

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

  21.  */

  22. 

  23. /*

  24.  * References

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

  26.  * SMPTE 377M MXF File Format Specifications

  27.  * SMPTE 379M MXF Generic Container

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

  29.  * SMPTE RP210: SMPTE Metadata Dictionary

  30.  * SMPTE RP224: Registry of SMPTE Universal Labels

  31.  */

  32. 

  33. //#define DEBUG

  34. 

  35. #include <math.h>

  36. #include <time.h>

  37. 

  38. #include "libavutil/opt.h"

  39. #include "libavutil/random_seed.h"

  40. #include "libavutil/timecode.h"

  41. #include "libavcodec/bytestream.h"

  42. #include "libavcodec/dnxhddata.h"

  43. #include "audiointerleave.h"

  44. #include "avformat.h"

  45. #include "internal.h"

  46. #include "mxf.h"

  47. #include "config.h"

  48. 

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

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

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

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

  53. 

  54. extern AVOutputFormat ff_mxf_d10_muxer;

  55. 

  56. #define EDIT_UNITS_PER_BODY 250

  57. #define KAG_SIZE 512

  58. 

  59. typedef struct {

  60.     int local_tag;

  61.     UID uid;

  62. } MXFLocalTagPair;

  63. 

  64. typedef struct {

  65.     uint8_t flags;

  66.     uint64_t offset;

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

  68.     uint16_t temporal_ref;

  69. } MXFIndexEntry;

  70. 

  71. typedef struct {

  72.     AudioInterleaveContext aic;

  73.     UID track_essence_element_key;

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

  75.     const UID *codec_ul;

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

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

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

  79.     int component_depth;

  80.     int temporal_reordering;

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

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

  83. } MXFStreamContext;

  84. 

  85. typedef struct {

  86.     UID container_ul;

  87.     UID element_ul;

  88.     UID codec_ul;

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

  90. } MXFContainerEssenceEntry;

  91. 

  92. static const struct {

  93.     enum CodecID id;

  94.     int index;

  95. } mxf_essence_mappings[] = {

  96.     { CODEC_ID_MPEG2VIDEO, 0 },

  97.     { CODEC_ID_PCM_S24LE,  1 },

  98.     { CODEC_ID_PCM_S16LE,  1 },

  99.     { CODEC_ID_DVVIDEO,   15 },

  100.     { CODEC_ID_DNXHD,     24 },

  101.     { CODEC_ID_NONE }

  102. };

  103. 

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

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

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

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

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

  109. 

  110. static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {

  111.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },

  112.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

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

  114.       mxf_write_mpegvideo_desc },

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

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

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

  118.       mxf_write_aes3_desc },

  119.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },

  120.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },

  121.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  122.       mxf_write_wav_desc },

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

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

  125.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  127.       mxf_write_cdci_desc },

  128.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },

  129.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  130.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  131.       mxf_write_generic_sound_desc },

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

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

  134.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  136.       mxf_write_cdci_desc },

  137.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },

  138.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  139.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  140.       mxf_write_generic_sound_desc },

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

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

  143.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

  144.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x03 },

  145.       mxf_write_cdci_desc },

  146.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },

  147.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  148.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  149.       mxf_write_generic_sound_desc },

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

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

  152.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  154.       mxf_write_cdci_desc },

  155.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },

  156.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  157.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  158.       mxf_write_generic_sound_desc },

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

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

  161.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

  162.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 },

  163.       mxf_write_cdci_desc },

  164.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },

  165.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  166.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  167.       mxf_write_generic_sound_desc },

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

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

  170.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  172.       mxf_write_cdci_desc },

  173.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },

  174.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  175.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  176.       mxf_write_generic_sound_desc },

  177.     // DV Unknwon

  178.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x7F,0x01 },

  179.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  180.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x00,0x00,0x00 },

  181.       mxf_write_cdci_desc },

  182.     // DV25 525/60

  183.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x40,0x01 },

  184.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  185.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x01,0x00 },

  186.       mxf_write_cdci_desc },

  187.     // DV25 625/50

  188.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 },

  189.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  190.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x02,0x00 },

  191.       mxf_write_cdci_desc },

  192.     // DV50 525/60

  193.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x50,0x01 },

  194.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  195.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x03,0x00 },

  196.       mxf_write_cdci_desc },

  197.     // DV50 625/50

  198.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x51,0x01 },

  199.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  200.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x04,0x00 },

  201.       mxf_write_cdci_desc },

  202.     // DV100 1080/60

  203.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x60,0x01 },

  204.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  205.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x05,0x00 },

  206.       mxf_write_cdci_desc },

  207.     // DV100 1080/50

  208.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x61,0x01 },

  209.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  210.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x06,0x00 },

  211.       mxf_write_cdci_desc },

  212.     // DV100 720/60

  213.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x62,0x01 },

  214.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  215.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x07,0x00 },

  216.       mxf_write_cdci_desc },

  217.     // DV100 720/50

  218.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x63,0x01 },

  219.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  220.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x08,0x00 },

  221.       mxf_write_cdci_desc },

  222.     // DNxHD 1080p 10bit high

  223.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  224.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  225.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x71,0x01,0x00,0x00 },

  226.       mxf_write_cdci_desc },

  227.     // DNxHD 1080p 8bit medium

  228.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  229.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  230.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x71,0x03,0x00,0x00 },

  231.       mxf_write_cdci_desc },

  232.     // DNxHD 1080p 8bit high

  233.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  234.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  235.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x71,0x04,0x00,0x00 },

  236.       mxf_write_cdci_desc },

  237.     // DNxHD 1080i 10bit high

  238.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  239.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  240.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x71,0x07,0x00,0x00 },

  241.       mxf_write_cdci_desc },

  242.     // DNxHD 1080i 8bit medium

  243.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  244.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  245.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x71,0x08,0x00,0x00 },

  246.       mxf_write_cdci_desc },

  247.     // DNxHD 1080i 8bit high

  248.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  249.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  250.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x71,0x09,0x00,0x00 },

  251.       mxf_write_cdci_desc },

  252.     // DNxHD 720p 10bit

  253.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  254.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  255.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x71,0x10,0x00,0x00 },

  256.       mxf_write_cdci_desc },

  257.     // DNxHD 720p 8bit high

  258.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  259.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  260.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x71,0x11,0x00,0x00 },

  261.       mxf_write_cdci_desc },

  262.     // DNxHD 720p 8bit medium

  263.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  264.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  265.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x71,0x12,0x00,0x00 },

  266.       mxf_write_cdci_desc },

  267.     // DNxHD 720p 8bit low

  268.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  269.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  270.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x71,0x13,0x00,0x00 },

  271.       mxf_write_cdci_desc },

  272.     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  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.       NULL },

  276. };

  277. 

  278. typedef struct MXFContext {

  279.     AVClass *av_class;

  280.     int64_t footer_partition_offset;

  281.     int essence_container_count;

  282.     AVRational time_base;

  283.     int header_written;

  284.     MXFIndexEntry *index_entries;

  285.     unsigned edit_units_count;

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

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

  288.     int last_indexed_edit_unit;

  289.     uint64_t *body_partition_offset;

  290.     unsigned body_partitions_count;

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

  292.     uint64_t duration;

  293.     AVTimecode tc;       ///< timecode context

  294.     AVStream *timecode_track;

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

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

  297.     uint64_t body_offset;

  298.     uint32_t instance_number;

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

  300. } MXFContext;

  301. 

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

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

  304. 

  305. /**

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

  307.  */

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

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

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

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

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

  313. 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

  314. 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

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

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

  317. 

  318. /**

  319.  * partial key for header metadata

  320.  */

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

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

  323. 

  324. /**

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

  326.  */

  327. static const MXFLocalTagPair mxf_local_tag_batch[] = {

  328.     // preface set

  329.     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */

  330.     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */

  331.     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */

  332.     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */

  333.     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */

  334.     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */

  335.     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */

  336.     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */

  337.     // Identification

  338.     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */

  339.     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */

  340.     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */

  341.     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */

  342.     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */

  343.     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */

  344.     // Content Storage

  345.     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */

  346.     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */

  347.     // Essence Container Data

  348.     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */

  349.     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */

  350.     // Package

  351.     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */

  352.     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */

  353.     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */

  354.     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */

  355.     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */

  356.     // Track

  357.     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */

  358.     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */

  359.     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */

  360.     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */

  361.     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */

  362.     // Sequence

  363.     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */

  364.     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */

  365.     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */

  366.     // Source Clip

  367.     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */

  368.     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */

  369.     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */

  370.     // Timecode Component

  371.     { 0x1501, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x05,0x00,0x00}}, /* Start Time Code */

  372.     { 0x1502, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x04,0x01,0x01,0x02,0x06,0x00,0x00}}, /* Rounded Time Code Base */

  373.     { 0x1503, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x04,0x01,0x01,0x05,0x00,0x00,0x00}}, /* Drop Frame */

  374.     // File Descriptor

  375.     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */

  376.     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */

  377.     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */

  378.     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */

  379.     // Generic Picture Essence Descriptor

  380.     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */

  381.     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */

  382.     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */

  383.     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */

  384.     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */

  385.     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */

  386.     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */

  387.     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */

  388.     { 0x3212, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x01,0x06,0x00,0x00,0x00}}, /* Field Dominance (Opt) */

  389.     // CDCI Picture Essence Descriptor

  390.     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */

  391.     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */

  392.     // Generic Sound Essence Descriptor

  393.     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */

  394.     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */

  395.     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */

  396.     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */

  397.     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */

  398.     // Index Table Segment

  399.     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */

  400.     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */

  401.     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */

  402.     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */

  403.     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */

  404.     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */

  405.     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */

  406.     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */

  407.     // MPEG video Descriptor

  408.     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */

  409.     { 0x8007, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0A,0x00,0x00}}, /* ProfileAndLevel */

  410.     // Wave Audio Essence Descriptor

  411.     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */

  412.     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */

  413. };

  414. 

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

  416. {

  417.     avio_write(pb, uuid_base, 12);

  418.     avio_wb16(pb, type);

  419.     avio_wb16(pb, value);

  420. }

  421. 

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

  423. {

  424.     MXFContext *mxf = s->priv_data;

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

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

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

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

  429. }

  430. 

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

  432. {

  433.     avio_wb32(pb, ref_count);

  434.     avio_wb32(pb, 16);

  435. }

  436. 

  437. static int klv_ber_length(uint64_t len)

  438. {

  439.     if (len < 128)

  440.         return 1;

  441.     else

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

  443. }

  444. 

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

  446. {

  447.     // Determine the best BER size

  448.     int size;

  449.     if (len < 128) {

  450.         //short form

  451.         avio_w8(pb, len);

  452.         return 1;

  453.     }

  454. 

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

  456. 

  457.     // long form

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

  459.     while(size) {

  460.         size--;

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

  462.     }

  463.     return 0;

  464. }

  465. 

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

  467. {

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

  469.     avio_wb24(pb, len);

  470. }

  471. 

  472. /*

  473.  * Get essence container ul index

  474.  */

  475. static int mxf_get_essence_container_ul_index(enum CodecID id)

  476. {

  477.     int i;

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

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

  480.             return mxf_essence_mappings[i].index;

  481.     return -1;

  482. }

  483. 

  484. static void mxf_write_primer_pack(AVFormatContext *s)

  485. {

  486.     AVIOContext *pb = s->pb;

  487.     int local_tag_number, i = 0;

  488. 

  489.     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);

  490. 

  491.     avio_write(pb, primer_pack_key, 16);

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

  493. 

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

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

  496. 

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

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

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

  500.     }

  501. }

  502. 

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

  504. {

  505.     avio_wb16(pb, tag);

  506.     avio_wb16(pb, size);

  507. }

  508. 

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

  510. {

  511.     avio_write(pb, header_metadata_key, 13);

  512.     avio_wb24(pb, value);

  513. }

  514. 

  515. static void mxf_free(AVFormatContext *s)

  516. {

  517.     int i;

  518. 

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

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

  521.         av_freep(&st->priv_data);

  522.     }

  523. }

  524. 

  525. static const MXFCodecUL *mxf_get_data_definition_ul(int type)

  526. {

  527.     const MXFCodecUL *uls = ff_mxf_data_definition_uls;

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

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

  530.             break;

  531.         uls++;

  532.     }

  533.     return uls;

  534. }

  535. 

  536. static void mxf_write_essence_container_refs(AVFormatContext *s)

  537. {

  538.     MXFContext *c = s->priv_data;

  539.     AVIOContext *pb = s->pb;

  540.     int i;

  541. 

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

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

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

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

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

  547.     }

  548. }

  549. 

  550. static void mxf_write_preface(AVFormatContext *s)

  551. {

  552.     MXFContext *mxf = s->priv_data;

  553.     AVIOContext *pb = s->pb;

  554. 

  555.     mxf_write_metadata_key(pb, 0x012f00);

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

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

  558. 

  559.     // write preface set uid

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

  561.     mxf_write_uuid(pb, Preface, 0);

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

  563. 

  564.     // last modified date

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

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

  567. 

  568.     // write version

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

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

  571. 

  572.     // write identification_refs

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

  574.     mxf_write_refs_count(pb, 1);

  575.     mxf_write_uuid(pb, Identification, 0);

  576. 

  577.     // write content_storage_refs

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

  579.     mxf_write_uuid(pb, ContentStorage, 0);

  580. 

  581.     // operational pattern

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

  583.     avio_write(pb, op1a_ul, 16);

  584. 

  585.     // write essence_container_refs

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

  587.     mxf_write_essence_container_refs(s);

  588. 

  589.     // write dm_scheme_refs

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

  591.     avio_wb64(pb, 0);

  592. }

  593. 

  594. /*

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

  596.  */

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

  598. {

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

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

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

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

  603. }

  604. 

  605. static void mxf_write_identification(AVFormatContext *s)

  606. {

  607.     MXFContext *mxf = s->priv_data;

  608.     AVIOContext *pb = s->pb;

  609.     const char *company = "FFmpeg";

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

  611.     const char *version;

  612.     int length;

  613. 

  614.     mxf_write_metadata_key(pb, 0x013000);

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

  616. 

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

  618.         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);

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

  620.     klv_encode_ber_length(pb, length);

  621. 

  622.     // write uid

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

  624.     mxf_write_uuid(pb, Identification, 0);

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

  626. 

  627.     // write generation uid

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

  629.     mxf_write_uuid(pb, Identification, 1);

  630. 

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

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

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

  634. 

  635.     // write product uid

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

  637.     mxf_write_uuid(pb, Identification, 2);

  638. 

  639.     // modification date

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

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

  642. }

  643. 

  644. static void mxf_write_content_storage(AVFormatContext *s)

  645. {

  646.     AVIOContext *pb = s->pb;

  647. 

  648.     mxf_write_metadata_key(pb, 0x011800);

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

  650.     klv_encode_ber_length(pb, 92);

  651. 

  652.     // write uid

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

  654.     mxf_write_uuid(pb, ContentStorage, 0);

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

  656. 

  657.     // write package reference

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

  659.     mxf_write_refs_count(pb, 2);

  660.     mxf_write_uuid(pb, MaterialPackage, 0);

  661.     mxf_write_uuid(pb, SourcePackage, 0);

  662. 

  663.     // write essence container data

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

  665.     mxf_write_refs_count(pb, 1);

  666.     mxf_write_uuid(pb, EssenceContainerData, 0);

  667. }

  668. 

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

  670. {

  671.     MXFContext *mxf = s->priv_data;

  672.     AVIOContext *pb = s->pb;

  673.     MXFStreamContext *sc = st->priv_data;

  674. 

  675.     mxf_write_metadata_key(pb, 0x013b00);

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

  677.     klv_encode_ber_length(pb, 80);

  678. 

  679.     // write track uid

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

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

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

  683. 

  684.     // write track id

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

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

  687. 

  688.     // write track number

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

  690.     if (type == MaterialPackage)

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

  692.     else

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

  694. 

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

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

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

  698. 

  699.     // write origin

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

  701.     avio_wb64(pb, 0);

  702. 

  703.     // write sequence refs

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

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

  706. }

  707. 

  708. 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 };

  709. 

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

  711. {

  712.     MXFContext *mxf = s->priv_data;

  713.     AVIOContext *pb = s->pb;

  714. 

  715.     // find data define uls

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

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

  718.         avio_write(pb, smpte_12m_timecode_track_data_ul, 16);

  719.     else {

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

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

  722.     }

  723. 

  724.     // write duration

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

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

  727. }

  728. 

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

  730. {

  731.     MXFContext *mxf = s->priv_data;

  732.     AVIOContext *pb = s->pb;

  733.     enum MXFMetadataSetType component;

  734. 

  735.     mxf_write_metadata_key(pb, 0x010f00);

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

  737.     klv_encode_ber_length(pb, 80);

  738. 

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

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

  741. 

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

  743.     mxf_write_common_fields(s, st);

  744. 

  745.     // write structural component

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

  747.     mxf_write_refs_count(pb, 1);

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

  749.         component = TimecodeComponent;

  750.     else

  751.         component = SourceClip;

  752.     if (type == SourcePackage)

  753.         component += TypeBottom;

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

  755. }

  756. 

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

  758. {

  759.     MXFContext *mxf = s->priv_data;

  760.     AVIOContext *pb = s->pb;

  761. 

  762.     mxf_write_metadata_key(pb, 0x011400);

  763.     klv_encode_ber_length(pb, 75);

  764. 

  765.     // UID

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

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

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

  769. 

  770.     mxf_write_common_fields(s, st);

  771. 

  772.     // Start Time Code

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

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

  775. 

  776.     // Rounded Time Code Base

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

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

  779. 

  780.     // Drop Frame

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

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

  783. }

  784. 

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

  786. {

  787.     AVIOContext *pb = s->pb;

  788.     int i;

  789. 

  790.     mxf_write_metadata_key(pb, 0x011100);

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

  792.     klv_encode_ber_length(pb, 108);

  793. 

  794.     // write uid

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

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

  797. 

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

  799.     mxf_write_common_fields(s, st);

  800. 

  801.     // write start_position

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

  803.     avio_wb64(pb, 0);

  804. 

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

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

  807.     if (type == SourcePackage) {

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

  809.             avio_wb64(pb, 0);

  810.     } else

  811.         mxf_write_umid(s, 1);

  812. 

  813.     // write source track id

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

  815.     if (type == SourcePackage)

  816.         avio_wb32(pb, 0);

  817.     else

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

  819. }

  820. 

  821. static void mxf_write_multi_descriptor(AVFormatContext *s)

  822. {

  823.     MXFContext *mxf = s->priv_data;

  824.     AVIOContext *pb = s->pb;

  825.     const uint8_t *ul;

  826.     int i;

  827. 

  828.     mxf_write_metadata_key(pb, 0x014400);

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

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

  831. 

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

  833.     mxf_write_uuid(pb, MultipleDescriptor, 0);

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

  835. 

  836.     // write sample rate

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

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

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

  840. 

  841.     // write essence container ul

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

  843.     if (mxf->essence_container_count > 1)

  844.         ul = multiple_desc_ul;

  845.     else {

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

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

  848.     }

  849.     avio_write(pb, ul, 16);

  850. 

  851.     // write sub descriptor refs

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

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

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

  855.         mxf_write_uuid(pb, SubDescriptor, i);

  856. }

  857. 

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

  859. {

  860.     MXFContext *mxf = s->priv_data;

  861.     MXFStreamContext *sc = st->priv_data;

  862.     AVIOContext *pb = s->pb;

  863. 

  864.     avio_write(pb, key, 16);

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

  866. 

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

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

  869. 

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

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

  872. 

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

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

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

  876. 

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

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

  879. }

  880. 

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

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

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

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

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

  886. 

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

  888. {

  889.     MXFStreamContext *sc = st->priv_data;

  890.     AVIOContext *pb = s->pb;

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

  892.     int display_height;

  893.     int f1, f2;

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

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

  896.         desc_size += 5;

  897. 

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

  899. 

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

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

  902. 

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

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

  905. 

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

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

  908. 

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

  910.         display_height = 576;

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

  912.         display_height = 486;

  913.     else

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

  915. 

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

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

  918. 

  919.     // component depth

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

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

  922. 

  923.     // horizontal subsampling

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

  925.     avio_wb32(pb, 2);

  926. 

  927.     // frame layout

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

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

  930. 

  931.     // video line map

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

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

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

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

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

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

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

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

  940.     }

  941. 

  942.     if (!sc->interlaced) {

  943.         f2  = 0;

  944.         f1 *= 2;

  945.     }

  946. 

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

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

  949.     avio_wb32(pb, 4);

  950.     avio_wb32(pb, f1);

  951.     if (sc->interlaced)

  952.         avio_wb32(pb, f2);

  953. 

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

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

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

  957. 

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

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

  960. 

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

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

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

  964.     }

  965. 

  966. }

  967. 

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

  969. {

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

  971. }

  972. 

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

  974. {

  975.     AVIOContext *pb = s->pb;

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

  977. 

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

  979. 

  980.     // bit rate

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

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

  983. 

  984.     // profile and level

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

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

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

  988.     avio_w8(pb, profile_and_level);

  989. }

  990. 

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

  992. {

  993.     AVIOContext *pb = s->pb;

  994. 

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

  996. 

  997.     // audio locked

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

  999.     avio_w8(pb, 1);

  1000. 

  1001.     // write audio sampling rate

  1002.     mxf_write_local_tag(pb, 8, 0x3D03);

  1003.     avio_wb32(pb, st->codec->sample_rate);

  1004.     avio_wb32(pb, 1);

  1005. 

  1006.     mxf_write_local_tag(pb, 4, 0x3D07);

  1007.     avio_wb32(pb, st->codec->channels);

  1008. 

  1009.     mxf_write_local_tag(pb, 4, 0x3D01);

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

  1011. }

  1012. 

  1013. static void mxf_write_wav_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)

  1014. {

  1015.     AVIOContext *pb = s->pb;

  1016. 

  1017.     mxf_write_generic_sound_common(s, st, key, size+6+8);

  1018. 

  1019.     mxf_write_local_tag(pb, 2, 0x3D0A);

  1020.     avio_wb16(pb, st->codec->block_align);

  1021. 

  1022.     // avg bytes per sec

  1023.     mxf_write_local_tag(pb, 4, 0x3D09);

  1024.     avio_wb32(pb, st->codec->block_align*st->codec->sample_rate);

  1025. }

  1026. 

  1027. static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)

  1028. {

  1029.     mxf_write_wav_common(s, st, mxf_wav_descriptor_key, 0);

  1030. }

  1031. 

  1032. static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)

  1033. {

  1034.     mxf_write_wav_common(s, st, mxf_aes3_descriptor_key, 0);

  1035. }

  1036. 

  1037. static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st)

  1038. {

  1039.     mxf_write_generic_sound_common(s, st, mxf_generic_sound_descriptor_key, 0);

  1040. }

  1041. 

  1042. static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)

  1043. {

  1044.     MXFContext *mxf = s->priv_data;

  1045.     AVIOContext *pb = s->pb;

  1046.     int i, track_count = s->nb_streams+1;

  1047. 

  1048.     if (type == MaterialPackage) {

  1049.         mxf_write_metadata_key(pb, 0x013600);

  1050.         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);

  1051.         klv_encode_ber_length(pb, 92 + 16*track_count);

  1052.     } else {

  1053.         mxf_write_metadata_key(pb, 0x013700);

  1054.         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);

  1055.         klv_encode_ber_length(pb, 112 + 16*track_count); // 20 bytes length for descriptor reference

  1056.     }

  1057. 

  1058.     // write uid

  1059.     mxf_write_local_tag(pb, 16, 0x3C0A);

  1060.     mxf_write_uuid(pb, type, 0);

  1061.     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);

  1062.     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);

  1063. 

  1064.     // write package umid

  1065.     mxf_write_local_tag(pb, 32, 0x4401);

  1066.     mxf_write_umid(s, type == SourcePackage);

  1067.     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);

  1068. 

  1069.     // package creation date

  1070.     mxf_write_local_tag(pb, 8, 0x4405);

  1071.     avio_wb64(pb, mxf->timestamp);

  1072. 

  1073.     // package modified date

  1074.     mxf_write_local_tag(pb, 8, 0x4404);

  1075.     avio_wb64(pb, mxf->timestamp);

  1076. 

  1077.     // write track refs

  1078.     mxf_write_local_tag(pb, track_count*16 + 8, 0x4403);

  1079.     mxf_write_refs_count(pb, track_count);

  1080.     mxf_write_uuid(pb, type == MaterialPackage ? Track :

  1081.                    Track + TypeBottom, -1); // timecode track

  1082.     for (i = 0; i < s->nb_streams; i++)

  1083.         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);

  1084. 

  1085.     // write multiple descriptor reference

  1086.     if (type == SourcePackage) {

  1087.         mxf_write_local_tag(pb, 16, 0x4701);

  1088.         if (s->nb_streams > 1) {

  1089.             mxf_write_uuid(pb, MultipleDescriptor, 0);

  1090.             mxf_write_multi_descriptor(s);

  1091.         } else

  1092.             mxf_write_uuid(pb, SubDescriptor, 0);

  1093.     }

  1094. 

  1095.     // write timecode track

  1096.     mxf_write_track(s, mxf->timecode_track, type);

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

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

  1099. 

  1100.     for (i = 0; i < s->nb_streams; i++) {

  1101.         AVStream *st = s->streams[i];

  1102.         mxf_write_track(s, st, type);

  1103.         mxf_write_sequence(s, st, type);

  1104.         mxf_write_structural_component(s, st, type);

  1105. 

  1106.         if (type == SourcePackage) {

  1107.             MXFStreamContext *sc = st->priv_data;

  1108.             mxf_essence_container_uls[sc->index].write_desc(s, st);

  1109.         }

  1110.     }

  1111. }

  1112. 

  1113. static int mxf_write_essence_container_data(AVFormatContext *s)

  1114. {

  1115.     AVIOContext *pb = s->pb;

  1116. 

  1117.     mxf_write_metadata_key(pb, 0x012300);

  1118.     klv_encode_ber_length(pb, 72);

  1119. 

  1120.     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID

  1121.     mxf_write_uuid(pb, EssenceContainerData, 0);

  1122. 

  1123.     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID

  1124.     mxf_write_umid(s, 1);

  1125. 

  1126.     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID

  1127.     avio_wb32(pb, 1);

  1128. 

  1129.     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID

  1130.     avio_wb32(pb, 2);

  1131. 

  1132.     return 0;

  1133. }

  1134. 

  1135. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  1136. {

  1137.     mxf_write_preface(s);

  1138.     mxf_write_identification(s);

  1139.     mxf_write_content_storage(s);

  1140.     mxf_write_package(s, MaterialPackage);

  1141.     mxf_write_package(s, SourcePackage);

  1142.     mxf_write_essence_container_data(s);

  1143.     return 0;

  1144. }

  1145. 

  1146. static unsigned klv_fill_size(uint64_t size)

  1147. {

  1148.     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));

  1149.     if (pad < 20) // smallest fill item possible

  1150.         return pad + KAG_SIZE;

  1151.     else

  1152.         return pad & (KAG_SIZE-1);

  1153. }

  1154. 

  1155. static void mxf_write_index_table_segment(AVFormatContext *s)

  1156. {

  1157.     MXFContext *mxf = s->priv_data;

  1158.     AVIOContext *pb = s->pb;

  1159.     int i, j, temporal_reordering = 0;

  1160.     int key_index = mxf->last_key_index;

  1161. 

  1162.     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);

  1163. 

  1164.     if (!mxf->edit_units_count && !mxf->edit_unit_byte_count)

  1165.         return;

  1166. 

  1167.     avio_write(pb, index_table_segment_key, 16);

  1168. 

  1169.     if (mxf->edit_unit_byte_count) {

  1170.         klv_encode_ber_length(pb, 80);

  1171.     } else {

  1172.         klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1)*6 +

  1173.                               12+mxf->edit_units_count*(11+mxf->slice_count*4));

  1174.     }

  1175. 

  1176.     // instance id

  1177.     mxf_write_local_tag(pb, 16, 0x3C0A);

  1178.     mxf_write_uuid(pb, IndexTableSegment, 0);

  1179. 

  1180.     // index edit rate

  1181.     mxf_write_local_tag(pb, 8, 0x3F0B);

  1182.     avio_wb32(pb, mxf->time_base.den);

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

  1184. 

  1185.     // index start position

  1186.     mxf_write_local_tag(pb, 8, 0x3F0C);

  1187.     avio_wb64(pb, mxf->last_indexed_edit_unit);

  1188. 

  1189.     // index duration

  1190.     mxf_write_local_tag(pb, 8, 0x3F0D);

  1191.     if (mxf->edit_unit_byte_count)

  1192.         avio_wb64(pb, 0); // index table covers whole container

  1193.     else

  1194.         avio_wb64(pb, mxf->edit_units_count);

  1195. 

  1196.     // edit unit byte count

  1197.     mxf_write_local_tag(pb, 4, 0x3F05);

  1198.     avio_wb32(pb, mxf->edit_unit_byte_count);

  1199. 

  1200.     // index sid

  1201.     mxf_write_local_tag(pb, 4, 0x3F06);

  1202.     avio_wb32(pb, 2);

  1203. 

  1204.     // body sid

  1205.     mxf_write_local_tag(pb, 4, 0x3F07);

  1206.     avio_wb32(pb, 1);

  1207. 

  1208.     if (!mxf->edit_unit_byte_count) {

  1209.         // real slice count - 1

  1210.         mxf_write_local_tag(pb, 1, 0x3F08);

  1211.         avio_w8(pb, mxf->slice_count);

  1212. 

  1213.         // delta entry array

  1214.         mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);

  1215.         avio_wb32(pb, s->nb_streams+1); // num of entries

  1216.         avio_wb32(pb, 6);               // size of one entry

  1217.         // write system item delta entry

  1218.         avio_w8(pb, 0);

  1219.         avio_w8(pb, 0); // slice entry

  1220.         avio_wb32(pb, 0); // element delta

  1221.         for (i = 0; i < s->nb_streams; i++) {

  1222.             AVStream *st = s->streams[i];

  1223.             MXFStreamContext *sc = st->priv_data;

  1224.             avio_w8(pb, sc->temporal_reordering);

  1225.             if (sc->temporal_reordering)

  1226.                 temporal_reordering = 1;

  1227.             if (i == 0) { // video track

  1228.                 avio_w8(pb, 0); // slice number

  1229.                 avio_wb32(pb, KAG_SIZE); // system item size including klv fill

  1230.             } else { // audio track

  1231.                 unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;

  1232.                 audio_frame_size += klv_fill_size(audio_frame_size);

  1233.                 avio_w8(pb, 1);

  1234.                 avio_wb32(pb, (i-1)*audio_frame_size); // element delta

  1235.             }

  1236.         }

  1237. 

  1238.         mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);

  1239.         avio_wb32(pb, mxf->edit_units_count);  // num of entries

  1240.         avio_wb32(pb, 11+mxf->slice_count*4);  // size of one entry

  1241. 

  1242.         for (i = 0; i < mxf->edit_units_count; i++) {

  1243.             int temporal_offset = 0;

  1244. 

  1245.             if (!(mxf->index_entries[i].flags & 0x33)) { // I frame

  1246.                 mxf->last_key_index = key_index;

  1247.                 key_index = i;

  1248.             }

  1249. 

  1250.             if (temporal_reordering) {

  1251.                 int pic_num_in_gop = i - key_index;

  1252.                 if (pic_num_in_gop != mxf->index_entries[i].temporal_ref) {

  1253.                     for (j = key_index; j < mxf->edit_units_count; j++) {

  1254.                         if (pic_num_in_gop == mxf->index_entries[j].temporal_ref)

  1255.                             break;

  1256.                     }

  1257.                     if (j == mxf->edit_units_count)

  1258.                         av_log(s, AV_LOG_WARNING, "missing frames\n");

  1259.                     temporal_offset = j - key_index - pic_num_in_gop;

  1260.                 }

  1261.             }

  1262.             avio_w8(pb, temporal_offset);

  1263. 

  1264.             if ((mxf->index_entries[i].flags & 0x30) == 0x30) { // back and forward prediction

  1265.                 avio_w8(pb, mxf->last_key_index - i);

  1266.             } else {

  1267.                 avio_w8(pb, key_index - i); // key frame offset

  1268.                 if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward

  1269.                     mxf->last_key_index = key_index;

  1270.             }

  1271. 

  1272.             if (!(mxf->index_entries[i].flags & 0x33) && // I frame

  1273.                 mxf->index_entries[i].flags & 0x40 && !temporal_offset)

  1274.                 mxf->index_entries[i].flags |= 0x80; // random access

  1275.             avio_w8(pb, mxf->index_entries[i].flags);

  1276.             // stream offset

  1277.             avio_wb64(pb, mxf->index_entries[i].offset);

  1278.             if (s->nb_streams > 1)

  1279.                 avio_wb32(pb, mxf->index_entries[i].slice_offset);

  1280.         }

  1281. 

  1282.         mxf->last_key_index = key_index - mxf->edit_units_count;

  1283.         mxf->last_indexed_edit_unit += mxf->edit_units_count;

  1284.         mxf->edit_units_count = 0;

  1285.     }

  1286. }

  1287. 

  1288. static void mxf_write_klv_fill(AVFormatContext *s)

  1289. {

  1290.     unsigned pad = klv_fill_size(avio_tell(s->pb));

  1291.     if (pad) {

  1292.         avio_write(s->pb, klv_fill_key, 16);

  1293.         pad -= 16 + 4;

  1294.         klv_encode_ber4_length(s->pb, pad);

  1295.         for (; pad; pad--)

  1296.             avio_w8(s->pb, 0);

  1297.         assert(!(avio_tell(s->pb) & (KAG_SIZE-1)));

  1298.     }

  1299. }

  1300. 

  1301. static void mxf_write_partition(AVFormatContext *s, int bodysid,

  1302.                                 int indexsid,

  1303.                                 const uint8_t *key, int write_metadata)

  1304. {

  1305.     MXFContext *mxf = s->priv_data;

  1306.     AVIOContext *pb = s->pb;

  1307.     int64_t header_byte_count_offset;

  1308.     unsigned index_byte_count = 0;

  1309.     uint64_t partition_offset = avio_tell(pb);

  1310. 

  1311.     if (!mxf->edit_unit_byte_count && mxf->edit_units_count)

  1312.         index_byte_count = 85 + 12+(s->nb_streams+1)*6 +

  1313.             12+mxf->edit_units_count*(11+mxf->slice_count*4);

  1314.     else if (mxf->edit_unit_byte_count && indexsid)

  1315.         index_byte_count = 80;

  1316. 

  1317.     if (index_byte_count) {

  1318.         // add encoded ber length

  1319.         index_byte_count += 16 + klv_ber_length(index_byte_count);

  1320.         index_byte_count += klv_fill_size(index_byte_count);

  1321.     }

  1322. 

  1323.     if (!memcmp(key, body_partition_key, 16)) {

  1324.         mxf->body_partition_offset =

  1325.             av_realloc(mxf->body_partition_offset,

  1326.                        (mxf->body_partitions_count+1)*

  1327.                        sizeof(*mxf->body_partition_offset));

  1328.         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;

  1329.     }

  1330. 

  1331.     // write klv

  1332.     avio_write(pb, key, 16);

  1333.     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);

  1334. 

  1335.     // write partition value

  1336.     avio_wb16(pb, 1); // majorVersion

  1337.     avio_wb16(pb, 2); // minorVersion

  1338.     avio_wb32(pb, KAG_SIZE); // KAGSize

  1339. 

  1340.     avio_wb64(pb, partition_offset); // ThisPartition

  1341. 

  1342.     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)

  1343.         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition

  1344.     else if (!memcmp(key, footer_partition_key, 16) && mxf->body_partitions_count)

  1345.         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition

  1346.     else

  1347.         avio_wb64(pb, 0);

  1348. 

  1349.     avio_wb64(pb, mxf->footer_partition_offset); // footerPartition

  1350. 

  1351.     // set offset

  1352.     header_byte_count_offset = avio_tell(pb);

  1353.     avio_wb64(pb, 0); // headerByteCount, update later

  1354. 

  1355.     // indexTable

  1356.     avio_wb64(pb, index_byte_count); // indexByteCount

  1357.     avio_wb32(pb, index_byte_count ? indexsid : 0); // indexSID

  1358. 

  1359.     // BodyOffset

  1360.     if (bodysid && mxf->edit_units_count && mxf->body_partitions_count) {

  1361.         avio_wb64(pb, mxf->body_offset);

  1362.     } else

  1363.         avio_wb64(pb, 0);

  1364. 

  1365.     avio_wb32(pb, bodysid); // bodySID

  1366. 

  1367.     // operational pattern

  1368.     avio_write(pb, op1a_ul, 16);

  1369. 

  1370.     // essence container

  1371.     mxf_write_essence_container_refs(s);

  1372. 

  1373.     if (write_metadata) {

  1374.         // mark the start of the headermetadata and calculate metadata size

  1375.         int64_t pos, start;

  1376.         unsigned header_byte_count;

  1377. 

  1378.         mxf_write_klv_fill(s);

  1379.         start = avio_tell(s->pb);

  1380.         mxf_write_primer_pack(s);

  1381.         mxf_write_header_metadata_sets(s);

  1382.         pos = avio_tell(s->pb);

  1383.         header_byte_count = pos - start + klv_fill_size(pos);

  1384. 

  1385.         // update header_byte_count

  1386.         avio_seek(pb, header_byte_count_offset, SEEK_SET);

  1387.         avio_wb64(pb, header_byte_count);

  1388.         avio_seek(pb, pos, SEEK_SET);

  1389.     }

  1390. 

  1391.     avio_flush(pb);

  1392. }

  1393. 

  1394. static int mxf_parse_dnxhd_frame(AVFormatContext *s, AVStream *st,

  1395. AVPacket *pkt)

  1396. {

  1397.     MXFContext *mxf = s->priv_data;

  1398.     MXFStreamContext *sc = st->priv_data;

  1399.     int i, cid;

  1400.     uint8_t* header_cid;

  1401.     unsigned int frame_size = 0;

  1402. 

  1403.     if (mxf->header_written)

  1404.         return 1;

  1405. 

  1406.     if (pkt->size < 43)

  1407.         return -1;

  1408. 

  1409.     header_cid = pkt->data + 0x28;

  1410.     cid = header_cid[0] << 24 | header_cid[1] << 16 | header_cid[2] << 8 | header_cid[3];

  1411. 

  1412.     if ((i = ff_dnxhd_get_cid_table(cid)) < 0)

  1413.         return -1;

  1414. 

  1415.     switch (cid) {

  1416.     case 1235:

  1417.         sc->index = 24;

  1418.         sc->component_depth = 10;

  1419.         break;

  1420.     case 1237:

  1421.         sc->index = 25;

  1422.         break;

  1423.     case 1238:

  1424.         sc->index = 26;

  1425.         break;

  1426.     case 1241:

  1427.         sc->index = 27;

  1428.         sc->component_depth = 10;

  1429.         break;

  1430.     case 1242:

  1431.         sc->index = 28;

  1432.         break;

  1433.     case 1243:

  1434.         sc->index = 29;

  1435.         break;

  1436.     case 1250:

  1437.         sc->index = 30;

  1438.         sc->component_depth = 10;

  1439.         break;

  1440.     case 1251:

  1441.         sc->index = 31;

  1442.         break;

  1443.     case 1252:

  1444.         sc->index = 32;

  1445.         break;

  1446.     case 1253:

  1447.         sc->index = 33;

  1448.         break;

  1449.     default:

  1450.         return -1;

  1451.     }

  1452. 

  1453.     frame_size = ff_dnxhd_cid_table[i].frame_size;

  1454. 

  1455.     mxf->edit_unit_byte_count = KAG_SIZE;

  1456.     for (i = 0; i < s->nb_streams; i++) {

  1457.         AVStream *st = s->streams[i];

  1458.         MXFStreamContext *sc = st->priv_data;

  1459.         if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

  1460.             mxf->edit_unit_byte_count += 16 + 4 + sc->aic.samples[0]*sc->aic.sample_size;

  1461.             mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1462.         } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  1463.             mxf->edit_unit_byte_count += 16 + 4 + frame_size;

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

  1465.         }

  1466.     }

  1467. 

  1468.     return 1;

  1469. }

  1470. 

  1471. static int mxf_parse_dv_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1472. {

  1473.     MXFContext *mxf = s->priv_data;

  1474.     MXFStreamContext *sc = st->priv_data;

  1475.     uint8_t *vs_pack, *vsc_pack;

  1476.     int i, ul_index, frame_size, stype, pal;

  1477. 

  1478.     if (mxf->header_written)

  1479.         return 1;

  1480. 

  1481.     // Check for minimal frame size

  1482.     if (pkt->size < 120000)

  1483.         return -1;

  1484. 

  1485.     vs_pack  = pkt->data + 80*5 + 48;

  1486.     vsc_pack = pkt->data + 80*5 + 53;

  1487.     stype    = vs_pack[3] & 0x1f;

  1488.     pal      = (vs_pack[3] >> 5) & 0x1;

  1489. 

  1490.     if ((vs_pack[2] & 0x07) == 0x02)

  1491.         sc->aspect_ratio = (AVRational){ 16, 9 };

  1492.     else

  1493.         sc->aspect_ratio = (AVRational){ 4, 3 };

  1494. 

  1495.     sc->interlaced = (vsc_pack[3] >> 4) & 0x01;

  1496.     // TODO: fix dv encoder to set proper FF/FS value in VSC pack

  1497.     // and set field dominance accordingly

  1498.     // av_log(s, AV_LOG_DEBUG, "DV vsc pack ff/ss = %x\n", vsc_pack[2] >> 6);

  1499. 

  1500.     switch (stype) {

  1501.     case 0x18: // DV100 720p

  1502.         ul_index = 6 + pal;

  1503.         frame_size = pal ? 288000 : 240000;

  1504.         if (sc->interlaced) {

  1505.             av_log(s, AV_LOG_ERROR, "source marked as interlaced but codec profile is progressive");

  1506.             sc->interlaced = 0;

  1507.         }

  1508.         break;

  1509.     case 0x14: // DV100 1080i

  1510.         ul_index = 4 + pal;

  1511.         frame_size = pal ? 576000 : 480000;

  1512.         break;

  1513.     case 0x04: // DV50

  1514.         ul_index = 2 + pal;

  1515.         frame_size = pal ? 288000 : 240000;

  1516.         break;

  1517.     default: // DV25

  1518.         ul_index = 0 + pal;

  1519.         frame_size = pal ? 144000 : 120000;

  1520.     }

  1521. 

  1522.     sc->index = ul_index + 16;

  1523.     sc->codec_ul =  &mxf_essence_container_uls[sc->index].codec_ul;

  1524. 

  1525.     mxf->edit_unit_byte_count = KAG_SIZE;

  1526.     for (i = 0; i < s->nb_streams; i++) {

  1527.         AVStream *st = s->streams[i];

  1528.         MXFStreamContext *sc = st->priv_data;

  1529.         if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

  1530.             mxf->edit_unit_byte_count += 16 + 4 + sc->aic.samples[0]*sc->aic.sample_size;

  1531.             mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1532.         } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  1533.             mxf->edit_unit_byte_count += 16 + 4 + frame_size;

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

  1535.         }

  1536.     }

  1537. 

  1538.     return 1;

  1539. }

  1540. 

  1541. static const UID mxf_mpeg2_codec_uls[] = {

  1542.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame

  1543.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP

  1544.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame

  1545.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP

  1546.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame

  1547.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP

  1548.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame

  1549.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP

  1550.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x05,0x02,0x00 }, // MP@H-14 I-Frame

  1551.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x05,0x03,0x00 }, // MP@H-14 Long GOP

  1552. };

  1553. 

  1554. static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)

  1555. {

  1556.     int long_gop = avctx->gop_size > 1 || avctx->has_b_frames;

  1557. 

  1558.     if (avctx->profile == 4) { // Main

  1559.         if (avctx->level == 8) // Main

  1560.             return &mxf_mpeg2_codec_uls[0+long_gop];

  1561.         else if (avctx->level == 4) // High

  1562.             return &mxf_mpeg2_codec_uls[4+long_gop];

  1563.         else if (avctx->level == 6) // High 14

  1564.             return &mxf_mpeg2_codec_uls[8+long_gop];

  1565.     } else if (avctx->profile == 0) { // 422

  1566.         if (avctx->level == 5) // Main

  1567.             return &mxf_mpeg2_codec_uls[2+long_gop];

  1568.         else if (avctx->level == 2) // High

  1569.             return &mxf_mpeg2_codec_uls[6+long_gop];

  1570.     }

  1571.     return NULL;

  1572. }

  1573. 

  1574. static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st,

  1575.                                  AVPacket *pkt, MXFIndexEntry *e)

  1576. {

  1577.     MXFStreamContext *sc = st->priv_data;

  1578.     uint32_t c = -1;

  1579.     int i;

  1580. 

  1581.     for(i = 0; i < pkt->size - 4; i++) {

  1582.         c = (c<<8) + pkt->data[i];

  1583.         if (c == 0x1b5) {

  1584.             if ((pkt->data[i+1] & 0xf0) == 0x10) { // seq ext

  1585.                 st->codec->profile = pkt->data[i+1] & 0x07;

  1586.                 st->codec->level   = pkt->data[i+2] >> 4;

  1587.             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext

  1588.                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame

  1589.                 if (sc->interlaced)

  1590.                     sc->field_dominance = 1 + !(pkt->data[i+4] & 0x80); // top field first

  1591.                 break;

  1592.             }

  1593.         } else if (c == 0x1b8) { // gop

  1594.             if (pkt->data[i+4]>>6 & 0x01) { // closed

  1595.                 sc->closed_gop = 1;

  1596.                 if (e->flags & 0x40) // sequence header present

  1597.                     e->flags |= 0x80; // random access

  1598.             }

  1599.         } else if (c == 0x1b3) { // seq

  1600.             e->flags |= 0x40;

  1601.             switch ((pkt->data[i+4]>>4) & 0xf) {

  1602.             case 2:  sc->aspect_ratio = (AVRational){  4,  3}; break;

  1603.             case 3:  sc->aspect_ratio = (AVRational){ 16,  9}; break;

  1604.             case 4:  sc->aspect_ratio = (AVRational){221,100}; break;

  1605.             default:

  1606.                 av_reduce(&sc->aspect_ratio.num, &sc->aspect_ratio.den,

  1607.                           st->codec->width, st->codec->height, 1024*1024);

  1608.             }

  1609.         } else if (c == 0x100) { // pic

  1610.             int pict_type = (pkt->data[i+2]>>3) & 0x07;

  1611.             e->temporal_ref = (pkt->data[i+1]<<2) | (pkt->data[i+2]>>6);

  1612.             if (pict_type == 2) { // P frame

  1613.                 e->flags |= 0x22;

  1614.                 sc->closed_gop = 0; // reset closed gop, don't matter anymore

  1615.             } else if (pict_type == 3) { // B frame

  1616.                 if (sc->closed_gop)

  1617.                     e->flags |= 0x13; // only backward prediction

  1618.                 else

  1619.                     e->flags |= 0x33;

  1620.                 sc->temporal_reordering = -1;

  1621.             } else if (!pict_type) {

  1622.                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");

  1623.                 return 0;

  1624.             }

  1625.         }

  1626.     }

  1627.     if (s->oformat != &ff_mxf_d10_muxer)

  1628.         sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);

  1629.     return !!sc->codec_ul;

  1630. }

  1631. 

  1632. static uint64_t mxf_parse_timestamp(time_t timestamp)

  1633. {

  1634.     struct tm *time = gmtime(&timestamp);

  1635.     if (!time)

  1636.         return 0;

  1637.     return (uint64_t)(time->tm_year+1900) << 48 |

  1638.            (uint64_t)(time->tm_mon+1)     << 40 |

  1639.            (uint64_t) time->tm_mday       << 32 |

  1640.                       time->tm_hour       << 24 |

  1641.                       time->tm_min        << 16 |

  1642.                       time->tm_sec        << 8;

  1643. }

  1644. 

  1645. static void mxf_gen_umid(AVFormatContext *s)

  1646. {

  1647.     MXFContext *mxf = s->priv_data;

  1648.     uint32_t seed = av_get_random_seed();

  1649.     uint64_t umid = seed + 0x5294713400000000LL;

  1650. 

  1651.     AV_WB64(mxf->umid  , umid);

  1652.     AV_WB64(mxf->umid+8, umid>>8);

  1653. 

  1654.     mxf->instance_number = seed;

  1655. }

  1656. 

  1657. static int mxf_write_header(AVFormatContext *s)

  1658. {

  1659.     MXFContext *mxf = s->priv_data;

  1660.     int i, ret;

  1661.     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};

  1662.     const int *samples_per_frame = NULL;

  1663.     AVDictionaryEntry *t;

  1664.     int64_t timestamp = 0;

  1665.     AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0);

  1666. 

  1667.     if (!s->nb_streams)

  1668.         return -1;

  1669. 

  1670.     for (i = 0; i < s->nb_streams; i++) {

  1671.         AVStream *st = s->streams[i];

  1672.         MXFStreamContext *sc = av_mallocz(sizeof(*sc));

  1673.         if (!sc)

  1674.             return AVERROR(ENOMEM);

  1675.         st->priv_data = sc;

  1676. 

  1677.         if ((i == 0) ^ (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)) {

  1678.             av_log(s, AV_LOG_ERROR, "there must be exactly one video stream and it must be the first one\n");

  1679.             return -1;

  1680.         }

  1681. 

  1682.         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  1683.             AVRational rate;

  1684.             // Default component depth to 8

  1685.             sc->component_depth = 8;

  1686.             if (fabs(av_q2d(st->codec->time_base) - 1/25.0) < 0.0001) {

  1687.                 samples_per_frame = PAL_samples_per_frame;

  1688.                 mxf->time_base = (AVRational){ 1, 25 };

  1689.                 mxf->timecode_base = 25;

  1690.             } else if (fabs(av_q2d(st->codec->time_base) - 1/50.0) < 0.0001) {

  1691.                 samples_per_frame = PAL_50_samples_per_frame;

  1692.                 mxf->time_base = (AVRational){ 1, 50 };

  1693.                 mxf->timecode_base = 50;

  1694.             } else if (fabs(av_q2d(st->codec->time_base) - 1001/30000.0) < 0.0001) {

  1695.                 samples_per_frame = NTSC_samples_per_frame;

  1696.                 mxf->time_base = (AVRational){ 1001, 30000 };

  1697.                 mxf->timecode_base = 30;

  1698.             } else if (fabs(av_q2d(st->codec->time_base) - 1001/60000.0) < 0.0001) {

  1699.                 samples_per_frame = NTSC_60_samples_per_frame;

  1700.                 mxf->time_base = (AVRational){ 1001, 60000 };

  1701.                 mxf->timecode_base = 60;

  1702.             } else {

  1703.                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");

  1704.                 return -1;

  1705.             }

  1706.             rate = (AVRational){mxf->time_base.den, mxf->time_base.num};

  1707.             avpriv_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);

  1708.             if (!tcr)

  1709.                 tcr = av_dict_get(st->metadata, "timecode", NULL, 0);

  1710.             if (tcr)

  1711.                 ret = av_timecode_init_from_string(&mxf->tc, rate, tcr->value, s);

  1712.             else

  1713.                 ret = av_timecode_init(&mxf->tc, rate, 0, 0, s);

  1714.             if (ret < 0)

  1715.                 return ret;

  1716.             if (s->oformat == &ff_mxf_d10_muxer) {

  1717.                 if (st->codec->bit_rate == 50000000)

  1718.                     if (mxf->time_base.den == 25) sc->index = 3;

  1719.                     else                          sc->index = 5;

  1720.                 else if (st->codec->bit_rate == 40000000)

  1721.                     if (mxf->time_base.den == 25) sc->index = 7;

  1722.                     else                          sc->index = 9;

  1723.                 else if (st->codec->bit_rate == 30000000)

  1724.                     if (mxf->time_base.den == 25) sc->index = 11;

  1725.                     else                          sc->index = 13;

  1726.                 else {

  1727.                     av_log(s, AV_LOG_ERROR, "error MXF D-10 only support 30/40/50 mbit/s\n");

  1728.                     return -1;

  1729.                 }

  1730. 

  1731.                 mxf->edit_unit_byte_count = KAG_SIZE; // system element

  1732.                 mxf->edit_unit_byte_count += 16 + 4 + (uint64_t)st->codec->bit_rate *

  1733.                     mxf->time_base.num / (8*mxf->time_base.den);

  1734.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1735.                 mxf->edit_unit_byte_count += 16 + 4 + 4 + samples_per_frame[0]*8*4;

  1736.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1737.             }

  1738.         } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

  1739.             if (st->codec->sample_rate != 48000) {

  1740.                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");

  1741.                 return -1;

  1742.             }

  1743.             avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);

  1744.             if (s->oformat == &ff_mxf_d10_muxer) {

  1745.                 if (st->index != 1) {

  1746.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support one audio track\n");

  1747.                     return -1;

  1748.                 }

  1749.                 if (st->codec->codec_id != CODEC_ID_PCM_S16LE &&

  1750.                     st->codec->codec_id != CODEC_ID_PCM_S24LE) {

  1751.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support 16 or 24 bits le audio\n");

  1752.                 }

  1753.                 sc->index = ((MXFStreamContext*)s->streams[0]->priv_data)->index + 1;

  1754.             } else

  1755.             mxf->slice_count = 1;

  1756.         }

  1757. 

  1758.         if (!sc->index) {

  1759.             sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);

  1760.             if (sc->index == -1) {

  1761.                 av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "

  1762.                        "codec not currently supported in container\n", i);

  1763.                 return -1;

  1764.             }

  1765.         }

  1766. 

  1767.         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;

  1768. 

  1769.         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);

  1770.         sc->track_essence_element_key[15] = present[sc->index];

  1771.         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);

  1772. 

  1773.         if (!present[sc->index])

  1774.             mxf->essence_container_count++;

  1775.         present[sc->index]++;

  1776.     }

  1777. 

  1778.     if (s->oformat == &ff_mxf_d10_muxer) {

  1779.         mxf->essence_container_count = 1;

  1780.     }

  1781. 

  1782.     if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))

  1783.         mxf_gen_umid(s);

  1784. 

  1785.     for (i = 0; i < s->nb_streams; i++) {

  1786.         MXFStreamContext *sc = s->streams[i]->priv_data;

  1787.         // update element count

  1788.         sc->track_essence_element_key[13] = present[sc->index];

  1789.         if (!memcmp(sc->track_essence_element_key, mxf_essence_container_uls[15].element_ul, 13)) // DV

  1790.             sc->order = (0x15 << 24) | AV_RB32(sc->track_essence_element_key+13);

  1791.         else

  1792.             sc->order = AV_RB32(sc->track_essence_element_key+12);

  1793.     }

  1794. 

  1795.     if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))

  1796.         timestamp = ff_iso8601_to_unix_time(t->value);

  1797.     if (timestamp)

  1798.         mxf->timestamp = mxf_parse_timestamp(timestamp);

  1799.     mxf->duration = -1;

  1800. 

  1801.     mxf->timecode_track = av_mallocz(sizeof(*mxf->timecode_track));

  1802.     if (!mxf->timecode_track)

  1803.         return AVERROR(ENOMEM);

  1804.     mxf->timecode_track->priv_data = av_mallocz(sizeof(MXFStreamContext));

  1805.     if (!mxf->timecode_track->priv_data)

  1806.         return AVERROR(ENOMEM);

  1807.     mxf->timecode_track->index = -1;

  1808. 

  1809.     if (!samples_per_frame)

  1810.         samples_per_frame = PAL_samples_per_frame;

  1811. 

  1812.     if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)

  1813.         return -1;

  1814. 

  1815.     return 0;

  1816. }

  1817. 

  1818. static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };

  1819. 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 };

  1820. 

  1821. static void mxf_write_system_item(AVFormatContext *s)

  1822. {

  1823.     MXFContext *mxf = s->priv_data;

  1824.     AVIOContext *pb = s->pb;

  1825.     unsigned frame;

  1826.     uint32_t time_code;

  1827. 

  1828.     frame = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  1829. 

  1830.     // write system metadata pack

  1831.     avio_write(pb, system_metadata_pack_key, 16);

  1832.     klv_encode_ber4_length(pb, 57);

  1833.     avio_w8(pb, 0x5c); // UL, user date/time stamp, picture and sound item present

  1834.     avio_w8(pb, 0x04); // content package rate

  1835.     avio_w8(pb, 0x00); // content package type

  1836.     avio_wb16(pb, 0x00); // channel handle

  1837.     avio_wb16(pb, mxf->tc.start + frame); // continuity count

  1838.     if (mxf->essence_container_count > 1)

  1839.         avio_write(pb, multiple_desc_ul, 16);

  1840.     else {

  1841.         MXFStreamContext *sc = s->streams[0]->priv_data;

  1842.         avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);

  1843.     }

  1844.     avio_w8(pb, 0);

  1845.     avio_wb64(pb, 0);

  1846.     avio_wb64(pb, 0); // creation date/time stamp

  1847. 

  1848.     avio_w8(pb, 0x81); // SMPTE 12M time code

  1849.     time_code = av_timecode_get_smpte_from_framenum(&mxf->tc, frame);

  1850.     avio_wb32(pb, time_code);

  1851.     avio_wb32(pb, 0); // binary group data

  1852.     avio_wb64(pb, 0);

  1853. 

  1854.     // write system metadata package set

  1855.     avio_write(pb, system_metadata_package_set_key, 16);

  1856.     klv_encode_ber4_length(pb, 35);

  1857.     avio_w8(pb, 0x83); // UMID

  1858.     avio_wb16(pb, 0x20);

  1859.     mxf_write_umid(s, 1);

  1860. }

  1861. 

  1862. static void mxf_write_d10_video_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1863. {

  1864.     MXFContext *mxf = s->priv_data;

  1865.     AVIOContext *pb = s->pb;

  1866.     int packet_size = (uint64_t)st->codec->bit_rate*mxf->time_base.num /

  1867.         (8*mxf->time_base.den); // frame size

  1868.     int pad;

  1869. 

  1870.     packet_size += 16 + 4;

  1871.     packet_size += klv_fill_size(packet_size);

  1872. 

  1873.     klv_encode_ber4_length(pb, pkt->size);

  1874.     avio_write(pb, pkt->data, pkt->size);

  1875. 

  1876.     // ensure CBR muxing by padding to correct video frame size

  1877.     pad = packet_size - pkt->size - 16 - 4;

  1878.     if (pad > 20) {

  1879.         avio_write(s->pb, klv_fill_key, 16);

  1880.         pad -= 16 + 4;

  1881.         klv_encode_ber4_length(s->pb, pad);

  1882.         for (; pad; pad--)

  1883.             avio_w8(s->pb, 0);

  1884.         assert(!(avio_tell(s->pb) & (KAG_SIZE-1)));

  1885.     } else {

  1886.         av_log(s, AV_LOG_WARNING, "cannot fill d-10 video packet\n");

  1887.         for (; pad > 0; pad--)

  1888.             avio_w8(s->pb, 0);

  1889.     }

  1890. }

  1891. 

  1892. static void mxf_write_d10_audio_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1893. {

  1894.     MXFContext *mxf = s->priv_data;

  1895.     AVIOContext *pb = s->pb;

  1896.     int frame_size = pkt->size / st->codec->block_align;

  1897.     uint8_t *samples = pkt->data;

  1898.     uint8_t *end = pkt->data + pkt->size;

  1899.     int i;

  1900. 

  1901.     klv_encode_ber4_length(pb, 4 + frame_size*4*8);

  1902. 

  1903.     avio_w8(pb, (frame_size == 1920 ? 0 : (mxf->edit_units_count-1) % 5 + 1));

  1904.     avio_wl16(pb, frame_size);

  1905.     avio_w8(pb, (1<<st->codec->channels)-1);

  1906. 

  1907.     while (samples < end) {

  1908.         for (i = 0; i < st->codec->channels; i++) {

  1909.             uint32_t sample;

  1910.             if (st->codec->codec_id == CODEC_ID_PCM_S24LE) {

  1911.                 sample = AV_RL24(samples)<< 4;

  1912.                 samples += 3;

  1913.             } else {

  1914.                 sample = AV_RL16(samples)<<12;

  1915.                 samples += 2;

  1916.             }

  1917.             avio_wl32(pb, sample | i);

  1918.         }

  1919.         for (; i < 8; i++)

  1920.             avio_wl32(pb, i);

  1921.     }

  1922. }

  1923. 

  1924. static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)

  1925. {

  1926.     MXFContext *mxf = s->priv_data;

  1927.     AVIOContext *pb = s->pb;

  1928.     AVStream *st = s->streams[pkt->stream_index];

  1929.     MXFStreamContext *sc = st->priv_data;

  1930.     MXFIndexEntry ie = {0};

  1931. 

  1932.     if (!mxf->edit_unit_byte_count && !(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {

  1933.         mxf->index_entries = av_realloc(mxf->index_entries,

  1934.             (mxf->edit_units_count + EDIT_UNITS_PER_BODY)*sizeof(*mxf->index_entries));

  1935.         if (!mxf->index_entries) {

  1936.             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");

  1937.             return -1;

  1938.         }

  1939.     }

  1940. 

  1941.     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {

  1942.         if (!mxf_parse_mpeg2_frame(s, st, pkt, &ie)) {

  1943.             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");

  1944.             return -1;

  1945.         }

  1946.     } else if (st->codec->codec_id == CODEC_ID_DNXHD) {

  1947.         if (!mxf_parse_dnxhd_frame(s, st, pkt)) {

  1948.             av_log(s, AV_LOG_ERROR, "could not get dnxhd profile\n");

  1949.             return -1;

  1950.         }

  1951.     } else if (st->codec->codec_id == CODEC_ID_DVVIDEO) {

  1952.         if (!mxf_parse_dv_frame(s, st, pkt)) {

  1953.             av_log(s, AV_LOG_ERROR, "could not get dv profile\n");

  1954.             return -1;

  1955.         }

  1956.     }

  1957. 

  1958.     if (!mxf->header_written) {

  1959.         if (mxf->edit_unit_byte_count) {

  1960.             mxf_write_partition(s, 1, 2, header_open_partition_key, 1);

  1961.             mxf_write_klv_fill(s);

  1962.             mxf_write_index_table_segment(s);

  1963.         } else {

  1964.             mxf_write_partition(s, 0, 0, header_open_partition_key, 1);

  1965.         }

  1966.         mxf->header_written = 1;

  1967.     }

  1968. 

  1969.     if (st->index == 0) {

  1970.         if (!mxf->edit_unit_byte_count &&

  1971.             (!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&

  1972.             !(ie.flags & 0x33)) { // I frame, Gop start

  1973.             mxf_write_klv_fill(s);

  1974.             mxf_write_partition(s, 1, 2, body_partition_key, 0);

  1975. 

  1976.             mxf_write_klv_fill(s);

  1977.             mxf_write_index_table_segment(s);

  1978.         }

  1979. 

  1980.         mxf_write_klv_fill(s);

  1981.         mxf_write_system_item(s);

  1982. 

  1983.         if (!mxf->edit_unit_byte_count) {

  1984.             mxf->index_entries[mxf->edit_units_count].offset = mxf->body_offset;

  1985.             mxf->index_entries[mxf->edit_units_count].flags = ie.flags;

  1986.             mxf->index_entries[mxf->edit_units_count].temporal_ref = ie.temporal_ref;

  1987.             mxf->body_offset += KAG_SIZE; // size of system element

  1988.         }

  1989.         mxf->edit_units_count++;

  1990.     } else if (!mxf->edit_unit_byte_count && st->index == 1) {

  1991.         mxf->index_entries[mxf->edit_units_count-1].slice_offset =

  1992.             mxf->body_offset - mxf->index_entries[mxf->edit_units_count-1].offset;

  1993.     }

  1994. 

  1995.     mxf_write_klv_fill(s);

  1996.     avio_write(pb, sc->track_essence_element_key, 16); // write key

  1997.     if (s->oformat == &ff_mxf_d10_muxer) {

  1998.         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)

  1999.             mxf_write_d10_video_packet(s, st, pkt);

  2000.         else

  2001.             mxf_write_d10_audio_packet(s, st, pkt);

  2002.     } else {

  2003.         klv_encode_ber4_length(pb, pkt->size); // write length

  2004.         avio_write(pb, pkt->data, pkt->size);

  2005.         mxf->body_offset += 16+4+pkt->size + klv_fill_size(16+4+pkt->size);

  2006.     }

  2007. 

  2008.     avio_flush(pb);

  2009. 

  2010.     return 0;

  2011. }

  2012. 

  2013. static void mxf_write_random_index_pack(AVFormatContext *s)

  2014. {

  2015.     MXFContext *mxf = s->priv_data;

  2016.     AVIOContext *pb = s->pb;

  2017.     uint64_t pos = avio_tell(pb);

  2018.     int i;

  2019. 

  2020.     avio_write(pb, random_index_pack_key, 16);

  2021.     klv_encode_ber_length(pb, 28 + 12*mxf->body_partitions_count);

  2022. 

  2023.     if (mxf->edit_unit_byte_count)

  2024.         avio_wb32(pb, 1); // BodySID of header partition

  2025.     else

  2026.         avio_wb32(pb, 0);

  2027.     avio_wb64(pb, 0); // offset of header partition

  2028. 

  2029.     for (i = 0; i < mxf->body_partitions_count; i++) {

  2030.         avio_wb32(pb, 1); // BodySID

  2031.         avio_wb64(pb, mxf->body_partition_offset[i]);

  2032.     }

  2033. 

  2034.     avio_wb32(pb, 0); // BodySID of footer partition

  2035.     avio_wb64(pb, mxf->footer_partition_offset);

  2036. 

  2037.     avio_wb32(pb, avio_tell(pb) - pos + 4);

  2038. }

  2039. 

  2040. static int mxf_write_footer(AVFormatContext *s)

  2041. {

  2042.     MXFContext *mxf = s->priv_data;

  2043.     AVIOContext *pb = s->pb;

  2044. 

  2045.     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  2046. 

  2047.     mxf_write_klv_fill(s);

  2048.     mxf->footer_partition_offset = avio_tell(pb);

  2049.     if (mxf->edit_unit_byte_count) { // no need to repeat index

  2050.         mxf_write_partition(s, 0, 0, footer_partition_key, 0);

  2051.     } else {

  2052.         mxf_write_partition(s, 0, 2, footer_partition_key, 0);

  2053. 

  2054.         mxf_write_klv_fill(s);

  2055.         mxf_write_index_table_segment(s);

  2056.     }

  2057. 

  2058.     mxf_write_klv_fill(s);

  2059.     mxf_write_random_index_pack(s);

  2060. 

  2061.     if (s->pb->seekable) {

  2062.         avio_seek(pb, 0, SEEK_SET);

  2063.         if (mxf->edit_unit_byte_count) {

  2064.             mxf_write_partition(s, 1, 2, header_closed_partition_key, 1);

  2065.             mxf_write_klv_fill(s);

  2066.             mxf_write_index_table_segment(s);

  2067.         } else {

  2068.             mxf_write_partition(s, 0, 0, header_closed_partition_key, 1);

  2069.         }

  2070.     }

  2071. 

  2072.     avio_flush(pb);

  2073. 

  2074.     ff_audio_interleave_close(s);

  2075. 

  2076.     av_freep(&mxf->index_entries);

  2077.     av_freep(&mxf->body_partition_offset);

  2078.     av_freep(&mxf->timecode_track->priv_data);

  2079.     av_freep(&mxf->timecode_track);

  2080. 

  2081.     mxf_free(s);

  2082. 

  2083.     return 0;

  2084. }

  2085. 

  2086. static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  2087. {

  2088.     int i, stream_count = 0;

  2089. 

  2090.     for (i = 0; i < s->nb_streams; i++)

  2091.         stream_count += !!s->streams[i]->last_in_packet_buffer;

  2092. 

  2093.     if (stream_count && (s->nb_streams == stream_count || flush)) {

  2094.         AVPacketList *pktl = s->packet_buffer;

  2095.         if (s->nb_streams != stream_count) {

  2096.             AVPacketList *last = NULL;

  2097.             // find last packet in edit unit

  2098.             while (pktl) {

  2099.                 if (!stream_count || pktl->pkt.stream_index == 0)

  2100.                     break;

  2101.                 last = pktl;

  2102.                 pktl = pktl->next;

  2103.                 stream_count--;

  2104.             }

  2105.             // purge packet queue

  2106.             while (pktl) {

  2107.                 AVPacketList *next = pktl->next;

  2108. 

  2109.                 if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)

  2110.                     s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;

  2111.                 av_free_packet(&pktl->pkt);

  2112.                 av_freep(&pktl);

  2113.                 pktl = next;

  2114.             }

  2115.             if (last)

  2116.                 last->next = NULL;

  2117.             else {

  2118.                 s->packet_buffer = NULL;

  2119.                 s->packet_buffer_end= NULL;

  2120.                 goto out;

  2121.             }

  2122.             pktl = s->packet_buffer;

  2123.         }

  2124. 

  2125.         *out = pktl->pkt;

  2126.         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);

  2127.         s->packet_buffer = pktl->next;

  2128.         if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)

  2129.             s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;

  2130.         if(!s->packet_buffer)

  2131.             s->packet_buffer_end= NULL;

  2132.         av_freep(&pktl);

  2133.         return 1;

  2134.     } else {

  2135.     out:

  2136.         av_init_packet(out);

  2137.         return 0;

  2138.     }

  2139. }

  2140. 

  2141. static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)

  2142. {

  2143.     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;

  2144.     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;

  2145. 

  2146.     return next->dts > pkt->dts ||

  2147.         (next->dts == pkt->dts && sc->order < sc2->order);

  2148. }

  2149. 

  2150. static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  2151. {

  2152.     return ff_audio_rechunk_interleave(s, out, pkt, flush,

  2153.                                mxf_interleave_get_packet, mxf_compare_timestamps);

  2154. }

  2155. 

  2156. AVOutputFormat ff_mxf_muxer = {

  2157.     .name              = "mxf",

  2158.     .long_name         = NULL_IF_CONFIG_SMALL("Material eXchange Format"),

  2159.     .mime_type         = "application/mxf",

  2160.     .extensions        = "mxf",

  2161.     .priv_data_size    = sizeof(MXFContext),

  2162.     .audio_codec       = CODEC_ID_PCM_S16LE,

  2163.     .video_codec       = CODEC_ID_MPEG2VIDEO,

  2164.     .write_header      = mxf_write_header,

  2165.     .write_packet      = mxf_write_packet,

  2166.     .write_trailer     = mxf_write_footer,

  2167.     .flags             = AVFMT_NOTIMESTAMPS,

  2168.     .interleave_packet = mxf_interleave,

  2169. };

  2170. 

  2171. AVOutputFormat ff_mxf_d10_muxer = {

  2172.     .name              = "mxf_d10",

  2173.     .long_name         = NULL_IF_CONFIG_SMALL("Material eXchange Format, D-10 Mapping"),

  2174.     .mime_type         = "application/mxf",

  2175.     .priv_data_size    = sizeof(MXFContext),

  2176.     .audio_codec       = CODEC_ID_PCM_S16LE,

  2177.     .video_codec       = CODEC_ID_MPEG2VIDEO,

  2178.     .write_header      = mxf_write_header,

  2179.     .write_packet      = mxf_write_packet,

  2180.     .write_trailer     = mxf_write_footer,

  2181.     .flags             = AVFMT_NOTIMESTAMPS,

  2182.     .interleave_packet = mxf_interleave,

  2183. };