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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 422M Mapping JPEG 2000 Codestreams into the MXF Generic Container

  30.  * SMPTE RP210: SMPTE Metadata Dictionary

  31.  * SMPTE RP224: Registry of SMPTE Universal Labels

  32.  */

  33. 

  34. #include <inttypes.h>

  35. #include <math.h>

  36. #include <time.h>

  37. 

  38. #include "libavutil/opt.h"

  39. #include "libavutil/random_seed.h"

  40. #include "libavutil/timecode.h"

  41. #include "libavutil/avassert.h"

  42. #include "libavcodec/bytestream.h"

  43. #include "libavcodec/dnxhddata.h"

  44. #include "audiointerleave.h"

  45. #include "avformat.h"

  46. #include "avio_internal.h"

  47. #include "internal.h"

  48. #include "mxf.h"

  49. #include "config.h"

  50. 

  51. extern AVOutputFormat ff_mxf_d10_muxer;

  52. 

  53. #define EDIT_UNITS_PER_BODY 250

  54. #define KAG_SIZE 512

  55. 

  56. typedef struct {

  57.     int local_tag;

  58.     UID uid;

  59. } MXFLocalTagPair;

  60. 

  61. typedef struct {

  62.     uint8_t flags;

  63.     uint64_t offset;

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

  65.     uint16_t temporal_ref;

  66. } MXFIndexEntry;

  67. 

  68. typedef struct {

  69.     AudioInterleaveContext aic;

  70.     UID track_essence_element_key;

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

  72.     const UID *codec_ul;

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

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

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

  76.     int component_depth;

  77.     int temporal_reordering;

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

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

  80.     int video_bit_rate;

  81. } MXFStreamContext;

  82. 

  83. typedef struct {

  84.     UID container_ul;

  85.     UID element_ul;

  86.     UID codec_ul;

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

  88. } MXFContainerEssenceEntry;

  89. 

  90. static const struct {

  91.     enum AVCodecID id;

  92.     int index;

  93. } mxf_essence_mappings[] = {

  94.     { AV_CODEC_ID_MPEG2VIDEO, 0 },

  95.     { AV_CODEC_ID_PCM_S24LE,  1 },

  96.     { AV_CODEC_ID_PCM_S16LE,  1 },

  97.     { AV_CODEC_ID_DVVIDEO,   15 },

  98.     { AV_CODEC_ID_DNXHD,     24 },

  99.     { AV_CODEC_ID_JPEG2000,  34 },

  100.     { AV_CODEC_ID_NONE }

  101. };

  102. 

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

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

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

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

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

  108. 

  109. static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {

  110.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },

  111.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  112.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },

  113.       mxf_write_mpegvideo_desc },

  114.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },

  115.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },

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

  117.       mxf_write_aes3_desc },

  118.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },

  119.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },

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

  121.       mxf_write_wav_desc },

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

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

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

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

  126.       mxf_write_cdci_desc },

  127.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },

  128.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

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

  130.       mxf_write_generic_sound_desc },

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

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

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

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

  135.       mxf_write_cdci_desc },

  136.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },

  137.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

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

  139.       mxf_write_generic_sound_desc },

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

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

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

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

  144.       mxf_write_cdci_desc },

  145.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },

  146.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

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

  148.       mxf_write_generic_sound_desc },

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

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

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

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

  153.       mxf_write_cdci_desc },

  154.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },

  155.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

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

  157.       mxf_write_generic_sound_desc },

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

  159.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },

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

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

  162.       mxf_write_cdci_desc },

  163.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },

  164.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

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

  166.       mxf_write_generic_sound_desc },

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

  168.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },

  169.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  171.       mxf_write_cdci_desc },

  172.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },

  173.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  174.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  175.       mxf_write_generic_sound_desc },

  176.     // DV Unknown

  177.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x7F,0x01 },

  178.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  179.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x00,0x00,0x00 },

  180.       mxf_write_cdci_desc },

  181.     // DV25 525/60

  182.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x40,0x01 },

  183.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  184.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x01,0x00 },

  185.       mxf_write_cdci_desc },

  186.     // DV25 625/50

  187.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 },

  188.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  189.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x02,0x00 },

  190.       mxf_write_cdci_desc },

  191.     // DV50 525/60

  192.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x50,0x01 },

  193.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  194.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x03,0x00 },

  195.       mxf_write_cdci_desc },

  196.     // DV50 625/50

  197.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x51,0x01 },

  198.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  199.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x04,0x00 },

  200.       mxf_write_cdci_desc },

  201.     // DV100 1080/60

  202.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x60,0x01 },

  203.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  204.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x05,0x00 },

  205.       mxf_write_cdci_desc },

  206.     // DV100 1080/50

  207.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x61,0x01 },

  208.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  209.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x06,0x00 },

  210.       mxf_write_cdci_desc },

  211.     // DV100 720/60

  212.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x62,0x01 },

  213.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  214.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x07,0x00 },

  215.       mxf_write_cdci_desc },

  216.     // DV100 720/50

  217.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x63,0x01 },

  218.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  219.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x08,0x00 },

  220.       mxf_write_cdci_desc },

  221.     // DNxHD 1080p 10bit high

  222.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  223.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  224.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x01,0x00,0x00 },

  225.       mxf_write_cdci_desc },

  226.     // DNxHD 1080p 8bit medium

  227.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  228.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  229.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x03,0x00,0x00 },

  230.       mxf_write_cdci_desc },

  231.     // DNxHD 1080p 8bit high

  232.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  233.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  234.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x04,0x00,0x00 },

  235.       mxf_write_cdci_desc },

  236.     // DNxHD 1080i 10bit high

  237.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  238.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  239.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x07,0x00,0x00 },

  240.       mxf_write_cdci_desc },

  241.     // DNxHD 1080i 8bit medium

  242.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  243.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  244.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x08,0x00,0x00 },

  245.       mxf_write_cdci_desc },

  246.     // DNxHD 1080i 8bit high

  247.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  248.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  249.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x09,0x00,0x00 },

  250.       mxf_write_cdci_desc },

  251.     // DNxHD 720p 10bit

  252.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  253.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  254.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x10,0x00,0x00 },

  255.       mxf_write_cdci_desc },

  256.     // DNxHD 720p 8bit high

  257.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  258.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  259.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x11,0x00,0x00 },

  260.       mxf_write_cdci_desc },

  261.     // DNxHD 720p 8bit medium

  262.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  263.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  264.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x12,0x00,0x00 },

  265.       mxf_write_cdci_desc },

  266.     // DNxHD 720p 8bit low

  267.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  268.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  269.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x13,0x00,0x00 },

  270.       mxf_write_cdci_desc },

  271.     // JPEG2000

  272.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0c,0x01,0x00 },

  273.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x08,0x00 },

  274.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 },

  275.       mxf_write_cdci_desc },

  276.     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  277.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  278.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  279.       NULL },

  280. };

  281. 

  282. typedef struct MXFContext {

  283.     AVClass *av_class;

  284.     int64_t footer_partition_offset;

  285.     int essence_container_count;

  286.     AVRational time_base;

  287.     int header_written;

  288.     MXFIndexEntry *index_entries;

  289.     unsigned edit_units_count;

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

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

  292.     int last_indexed_edit_unit;

  293.     uint64_t *body_partition_offset;

  294.     unsigned body_partitions_count;

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

  296.     uint64_t duration;

  297.     AVTimecode tc;       ///< timecode context

  298.     AVStream *timecode_track;

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

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

  301.     uint64_t body_offset;

  302.     uint32_t instance_number;

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

  304.     int channel_count;

  305. } MXFContext;

  306. 

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

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

  309. 

  310. /**

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

  312.  */

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

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

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

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

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

  318. 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

  319. 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

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

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

  322. 

  323. /**

  324.  * partial key for header metadata

  325.  */

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

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

  328. 

  329. /**

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

  331.  */

  332. static const MXFLocalTagPair mxf_local_tag_batch[] = {

  333.     // preface set

  334.     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */

  335.     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */

  336.     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */

  337.     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */

  338.     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */

  339.     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */

  340.     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */

  341.     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */

  342.     // Identification

  343.     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */

  344.     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */

  345.     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */

  346.     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */

  347.     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */

  348.     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */

  349.     // Content Storage

  350.     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */

  351.     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */

  352.     // Essence Container Data

  353.     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */

  354.     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */

  355.     // Package

  356.     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */

  357.     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */

  358.     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */

  359.     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */

  360.     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */

  361.     // Track

  362.     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */

  363.     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */

  364.     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */

  365.     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */

  366.     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */

  367.     // Sequence

  368.     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */

  369.     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */

  370.     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */

  371.     // Source Clip

  372.     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */

  373.     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */

  374.     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */

  375.     // Timecode Component

  376.     { 0x1501, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x05,0x00,0x00}}, /* Start Time Code */

  377.     { 0x1502, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x04,0x01,0x01,0x02,0x06,0x00,0x00}}, /* Rounded Time Code Base */

  378.     { 0x1503, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x04,0x01,0x01,0x05,0x00,0x00,0x00}}, /* Drop Frame */

  379.     // File Descriptor

  380.     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */

  381.     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */

  382.     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */

  383.     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */

  384.     // Generic Picture Essence Descriptor

  385.     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */

  386.     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */

  387.     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */

  388.     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */

  389.     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */

  390.     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */

  391.     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */

  392.     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */

  393.     { 0x3212, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x01,0x06,0x00,0x00,0x00}}, /* Field Dominance (Opt) */

  394.     // CDCI Picture Essence Descriptor

  395.     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */

  396.     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */

  397.     // Generic Sound Essence Descriptor

  398.     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */

  399.     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */

  400.     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */

  401.     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */

  402.     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */

  403.     // Index Table Segment

  404.     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */

  405.     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */

  406.     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */

  407.     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */

  408.     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */

  409.     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */

  410.     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */

  411.     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */

  412.     // MPEG video Descriptor

  413.     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */

  414.     { 0x8007, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0A,0x00,0x00}}, /* ProfileAndLevel */

  415.     // Wave Audio Essence Descriptor

  416.     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */

  417.     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */

  418. };

  419. 

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

  421. {

  422.     avio_write(pb, uuid_base, 12);

  423.     avio_wb16(pb, type);

  424.     avio_wb16(pb, value);

  425. }

  426. 

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

  428. {

  429.     MXFContext *mxf = s->priv_data;

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

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

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

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

  434. }

  435. 

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

  437. {

  438.     avio_wb32(pb, ref_count);

  439.     avio_wb32(pb, 16);

  440. }

  441. 

  442. static int klv_ber_length(uint64_t len)

  443. {

  444.     if (len < 128)

  445.         return 1;

  446.     else

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

  448. }

  449. 

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

  451. {

  452.     // Determine the best BER size

  453.     int size;

  454.     if (len < 128) {

  455.         //short form

  456.         avio_w8(pb, len);

  457.         return 1;

  458.     }

  459. 

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

  461. 

  462.     // long form

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

  464.     while(size) {

  465.         size--;

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

  467.     }

  468.     return 0;

  469. }

  470. 

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

  472. {

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

  474.     avio_wb24(pb, len);

  475. }

  476. 

  477. /*

  478.  * Get essence container ul index

  479.  */

  480. static int mxf_get_essence_container_ul_index(enum AVCodecID id)

  481. {

  482.     int i;

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

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

  485.             return mxf_essence_mappings[i].index;

  486.     return -1;

  487. }

  488. 

  489. static void mxf_write_primer_pack(AVFormatContext *s)

  490. {

  491.     AVIOContext *pb = s->pb;

  492.     int local_tag_number, i = 0;

  493. 

  494.     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);

  495. 

  496.     avio_write(pb, primer_pack_key, 16);

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

  498. 

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

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

  501. 

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

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

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

  505.     }

  506. }

  507. 

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

  509. {

  510.     avio_wb16(pb, tag);

  511.     avio_wb16(pb, size);

  512. }

  513. 

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

  515. {

  516.     avio_write(pb, header_metadata_key, 13);

  517.     avio_wb24(pb, value);

  518. }

  519. 

  520. static void mxf_free(AVFormatContext *s)

  521. {

  522.     int i;

  523. 

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

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

  526.         av_freep(&st->priv_data);

  527.     }

  528. }

  529. 

  530. static const MXFCodecUL *mxf_get_data_definition_ul(int type)

  531. {

  532.     const MXFCodecUL *uls = ff_mxf_data_definition_uls;

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

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

  535.             break;

  536.         uls++;

  537.     }

  538.     return uls;

  539. }

  540. 

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

  542. #define DESCRIPTOR_COUNT(essence_container_count) \

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

  544. 

  545. static void mxf_write_essence_container_refs(AVFormatContext *s)

  546. {

  547.     MXFContext *c = s->priv_data;

  548.     AVIOContext *pb = s->pb;

  549.     int i;

  550. 

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

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

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

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

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

  556.     }

  557. 

  558.     if (c->essence_container_count > 1)

  559.         avio_write(pb, multiple_desc_ul, 16);

  560. }

  561. 

  562. static void mxf_write_preface(AVFormatContext *s)

  563. {

  564.     MXFContext *mxf = s->priv_data;

  565.     AVIOContext *pb = s->pb;

  566. 

  567.     mxf_write_metadata_key(pb, 0x012f00);

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

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

  570. 

  571.     // write preface set uid

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

  573.     mxf_write_uuid(pb, Preface, 0);

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

  575. 

  576.     // last modified date

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

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

  579. 

  580.     // write version

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

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

  583. 

  584.     // write identification_refs

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

  586.     mxf_write_refs_count(pb, 1);

  587.     mxf_write_uuid(pb, Identification, 0);

  588. 

  589.     // write content_storage_refs

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

  591.     mxf_write_uuid(pb, ContentStorage, 0);

  592. 

  593.     // operational pattern

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

  595.     avio_write(pb, op1a_ul, 16);

  596. 

  597.     // write essence_container_refs

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

  599.     mxf_write_essence_container_refs(s);

  600. 

  601.     // write dm_scheme_refs

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

  603.     avio_wb64(pb, 0);

  604. }

  605. 

  606. /*

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

  608.  */

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

  610. {

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

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

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

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

  615. }

  616. 

  617. static void mxf_write_identification(AVFormatContext *s)

  618. {

  619.     MXFContext *mxf = s->priv_data;

  620.     AVIOContext *pb = s->pb;

  621.     const char *company = "FFmpeg";

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

  623.     const char *version;

  624.     int length;

  625. 

  626.     mxf_write_metadata_key(pb, 0x013000);

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

  628. 

  629.     version = s->flags & AVFMT_FLAG_BITEXACT ?

  630.         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);

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

  632.     klv_encode_ber_length(pb, length);

  633. 

  634.     // write uid

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

  636.     mxf_write_uuid(pb, Identification, 0);

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

  638. 

  639.     // write generation uid

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

  641.     mxf_write_uuid(pb, Identification, 1);

  642. 

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

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

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

  646. 

  647.     // write product uid

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

  649.     mxf_write_uuid(pb, Identification, 2);

  650. 

  651.     // modification date

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

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

  654. }

  655. 

  656. static void mxf_write_content_storage(AVFormatContext *s)

  657. {

  658.     AVIOContext *pb = s->pb;

  659. 

  660.     mxf_write_metadata_key(pb, 0x011800);

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

  662.     klv_encode_ber_length(pb, 92);

  663. 

  664.     // write uid

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

  666.     mxf_write_uuid(pb, ContentStorage, 0);

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

  668. 

  669.     // write package reference

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

  671.     mxf_write_refs_count(pb, 2);

  672.     mxf_write_uuid(pb, MaterialPackage, 0);

  673.     mxf_write_uuid(pb, SourcePackage, 0);

  674. 

  675.     // write essence container data

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

  677.     mxf_write_refs_count(pb, 1);

  678.     mxf_write_uuid(pb, EssenceContainerData, 0);

  679. }

  680. 

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

  682. {

  683.     MXFContext *mxf = s->priv_data;

  684.     AVIOContext *pb = s->pb;

  685.     MXFStreamContext *sc = st->priv_data;

  686. 

  687.     mxf_write_metadata_key(pb, 0x013b00);

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

  689.     klv_encode_ber_length(pb, 80);

  690. 

  691.     // write track uid

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

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

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

  695. 

  696.     // write track id

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

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

  699. 

  700.     // write track number

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

  702.     if (type == MaterialPackage)

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

  704.     else

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

  706. 

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

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

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

  710. 

  711.     // write origin

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

  713.     avio_wb64(pb, 0);

  714. 

  715.     // write sequence refs

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

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

  718. }

  719. 

  720. 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 };

  721. 

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

  723. {

  724.     MXFContext *mxf = s->priv_data;

  725.     AVIOContext *pb = s->pb;

  726. 

  727.     // find data define uls

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

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

  730.         avio_write(pb, smpte_12m_timecode_track_data_ul, 16);

  731.     else {

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

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

  734.     }

  735. 

  736.     // write duration

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

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

  739. }

  740. 

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

  742. {

  743.     MXFContext *mxf = s->priv_data;

  744.     AVIOContext *pb = s->pb;

  745.     enum MXFMetadataSetType component;

  746. 

  747.     mxf_write_metadata_key(pb, 0x010f00);

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

  749.     klv_encode_ber_length(pb, 80);

  750. 

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

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

  753. 

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

  755.     mxf_write_common_fields(s, st);

  756. 

  757.     // write structural component

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

  759.     mxf_write_refs_count(pb, 1);

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

  761.         component = TimecodeComponent;

  762.     else

  763.         component = SourceClip;

  764.     if (type == SourcePackage)

  765.         component += TypeBottom;

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

  767. }

  768. 

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

  770. {

  771.     MXFContext *mxf = s->priv_data;

  772.     AVIOContext *pb = s->pb;

  773. 

  774.     mxf_write_metadata_key(pb, 0x011400);

  775.     klv_encode_ber_length(pb, 75);

  776. 

  777.     // UID

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

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

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

  781. 

  782.     mxf_write_common_fields(s, st);

  783. 

  784.     // Start Time Code

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

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

  787. 

  788.     // Rounded Time Code Base

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

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

  791. 

  792.     // Drop Frame

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

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

  795. }

  796. 

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

  798. {

  799.     AVIOContext *pb = s->pb;

  800.     int i;

  801. 

  802.     mxf_write_metadata_key(pb, 0x011100);

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

  804.     klv_encode_ber_length(pb, 108);

  805. 

  806.     // write uid

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

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

  809. 

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

  811.     mxf_write_common_fields(s, st);

  812. 

  813.     // write start_position

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

  815.     avio_wb64(pb, 0);

  816. 

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

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

  819.     if (type == SourcePackage) {

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

  821.             avio_wb64(pb, 0);

  822.     } else

  823.         mxf_write_umid(s, 1);

  824. 

  825.     // write source track id

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

  827.     if (type == SourcePackage)

  828.         avio_wb32(pb, 0);

  829.     else

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

  831. }

  832. 

  833. static void mxf_write_multi_descriptor(AVFormatContext *s)

  834. {

  835.     MXFContext *mxf = s->priv_data;

  836.     AVIOContext *pb = s->pb;

  837.     const uint8_t *ul;

  838.     int i;

  839. 

  840.     mxf_write_metadata_key(pb, 0x014400);

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

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

  843. 

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

  845.     mxf_write_uuid(pb, MultipleDescriptor, 0);

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

  847. 

  848.     // write sample rate

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

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

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

  852. 

  853.     // write essence container ul

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

  855.     if (mxf->essence_container_count > 1)

  856.         ul = multiple_desc_ul;

  857.     else {

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

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

  860.     }

  861.     avio_write(pb, ul, 16);

  862. 

  863.     // write sub descriptor refs

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

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

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

  867.         mxf_write_uuid(pb, SubDescriptor, i);

  868. }

  869. 

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

  871. {

  872.     MXFContext *mxf = s->priv_data;

  873.     MXFStreamContext *sc = st->priv_data;

  874.     AVIOContext *pb = s->pb;

  875. 

  876.     avio_write(pb, key, 16);

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

  878. 

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

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

  881. 

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

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

  884. 

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

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

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

  888. 

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

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

  891. }

  892. 

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

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

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

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

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

  898. 

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

  900. {

  901.     MXFStreamContext *sc = st->priv_data;

  902.     AVIOContext *pb = s->pb;

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

  904.     int display_height;

  905.     int f1, f2;

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

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

  908.         desc_size += 5;

  909. 

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

  911. 

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

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

  914. 

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

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

  917. 

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

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

  920. 

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

  922.         display_height = 576;

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

  924.         display_height = 486;

  925.     else

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

  927. 

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

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

  930. 

  931.     // component depth

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

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

  934. 

  935.     // horizontal subsampling

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

  937.     avio_wb32(pb, 2);

  938. 

  939.     // frame layout

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

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

  942. 

  943.     // video line map

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

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

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

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

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

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

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

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

  952.     }

  953. 

  954.     if (!sc->interlaced) {

  955.         f2  = 0;

  956.         f1 *= 2;

  957.     }

  958. 

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

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

  961.     avio_wb32(pb, 4);

  962.     avio_wb32(pb, f1);

  963.     if (sc->interlaced)

  964.         avio_wb32(pb, f2);

  965. 

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

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

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

  969. 

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

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

  972. 

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

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

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

  976.     }

  977. 

  978. }

  979. 

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

  981. {

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

  983. }

  984. 

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

  986. {

  987.     AVIOContext *pb = s->pb;

  988.     MXFStreamContext *sc = st->priv_data;

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

  990. 

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

  992. 

  993.     // bit rate

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

  995.     avio_wb32(pb, sc->video_bit_rate);

  996. 

  997.     // profile and level

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

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

  1000.         profile_and_level |= 0x80; // escape bit

  1001.     avio_w8(pb, profile_and_level);

  1002. }

  1003. 

  1004. static void mxf_write_generic_sound_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)

  1005. {

  1006.     AVIOContext *pb = s->pb;

  1007.     MXFContext *mxf = s->priv_data;

  1008.     int show_warnings = !mxf->footer_partition_offset;

  1009. 

  1010.     mxf_write_generic_desc(s, st, key, size+5+12+8+8);

  1011. 

  1012.     // audio locked

  1013.     mxf_write_local_tag(pb, 1, 0x3D02);

  1014.     avio_w8(pb, 1);

  1015. 

  1016.     // write audio sampling rate

  1017.     mxf_write_local_tag(pb, 8, 0x3D03);

  1018.     avio_wb32(pb, st->codec->sample_rate);

  1019.     avio_wb32(pb, 1);

  1020. 

  1021.     mxf_write_local_tag(pb, 4, 0x3D07);

  1022.     if (mxf->channel_count == -1) {

  1023.         if (show_warnings && (s->oformat == &ff_mxf_d10_muxer) && (st->codec->channels != 4) && (st->codec->channels != 8))

  1024.             av_log(s, AV_LOG_WARNING, "the number of audio channels shall be 4 or 8 : the output will not comply to MXF D-10 specs, use -d10_channelcount to fix this\n");

  1025.         avio_wb32(pb, st->codec->channels);

  1026.     } else if (s->oformat == &ff_mxf_d10_muxer) {

  1027.         if (show_warnings && (mxf->channel_count < st->codec->channels))

  1028.             av_log(s, AV_LOG_WARNING, "d10_channelcount < actual number of audio channels : some channels will be discarded\n");

  1029.         if (show_warnings && (mxf->channel_count != 4) && (mxf->channel_count != 8))

  1030.             av_log(s, AV_LOG_WARNING, "d10_channelcount shall be set to 4 or 8 : the output will not comply to MXF D-10 specs\n");

  1031.         avio_wb32(pb, mxf->channel_count);

  1032.     } else {

  1033.         if (show_warnings && mxf->channel_count != -1)

  1034.             av_log(s, AV_LOG_ERROR, "-d10_channelcount requires MXF D-10 and will be ignored\n");

  1035.         avio_wb32(pb, st->codec->channels);

  1036.     }

  1037. 

  1038.     mxf_write_local_tag(pb, 4, 0x3D01);

  1039.     avio_wb32(pb, av_get_bits_per_sample(st->codec->codec_id));

  1040. }

  1041. 

  1042. static void mxf_write_wav_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)

  1043. {

  1044.     AVIOContext *pb = s->pb;

  1045. 

  1046.     mxf_write_generic_sound_common(s, st, key, size+6+8);

  1047. 

  1048.     mxf_write_local_tag(pb, 2, 0x3D0A);

  1049.     avio_wb16(pb, st->codec->block_align);

  1050. 

  1051.     // avg bytes per sec

  1052.     mxf_write_local_tag(pb, 4, 0x3D09);

  1053.     avio_wb32(pb, st->codec->block_align*st->codec->sample_rate);

  1054. }

  1055. 

  1056. static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)

  1057. {

  1058.     mxf_write_wav_common(s, st, mxf_wav_descriptor_key, 0);

  1059. }

  1060. 

  1061. static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)

  1062. {

  1063.     mxf_write_wav_common(s, st, mxf_aes3_descriptor_key, 0);

  1064. }

  1065. 

  1066. static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st)

  1067. {

  1068.     mxf_write_generic_sound_common(s, st, mxf_generic_sound_descriptor_key, 0);

  1069. }

  1070. 

  1071. static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)

  1072. {

  1073.     MXFContext *mxf = s->priv_data;

  1074.     AVIOContext *pb = s->pb;

  1075.     int i, track_count = s->nb_streams+1;

  1076. 

  1077.     if (type == MaterialPackage) {

  1078.         mxf_write_metadata_key(pb, 0x013600);

  1079.         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);

  1080.         klv_encode_ber_length(pb, 92 + 16*track_count);

  1081.     } else {

  1082.         mxf_write_metadata_key(pb, 0x013700);

  1083.         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);

  1084.         klv_encode_ber_length(pb, 112 + 16*track_count); // 20 bytes length for descriptor reference

  1085.     }

  1086. 

  1087.     // write uid

  1088.     mxf_write_local_tag(pb, 16, 0x3C0A);

  1089.     mxf_write_uuid(pb, type, 0);

  1090.     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);

  1091.     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);

  1092. 

  1093.     // write package umid

  1094.     mxf_write_local_tag(pb, 32, 0x4401);

  1095.     mxf_write_umid(s, type == SourcePackage);

  1096.     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);

  1097. 

  1098.     // package creation date

  1099.     mxf_write_local_tag(pb, 8, 0x4405);

  1100.     avio_wb64(pb, mxf->timestamp);

  1101. 

  1102.     // package modified date

  1103.     mxf_write_local_tag(pb, 8, 0x4404);

  1104.     avio_wb64(pb, mxf->timestamp);

  1105. 

  1106.     // write track refs

  1107.     mxf_write_local_tag(pb, track_count*16 + 8, 0x4403);

  1108.     mxf_write_refs_count(pb, track_count);

  1109.     mxf_write_uuid(pb, type == MaterialPackage ? Track :

  1110.                    Track + TypeBottom, -1); // timecode track

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

  1112.         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);

  1113. 

  1114.     // write multiple descriptor reference

  1115.     if (type == SourcePackage) {

  1116.         mxf_write_local_tag(pb, 16, 0x4701);

  1117.         if (s->nb_streams > 1) {

  1118.             mxf_write_uuid(pb, MultipleDescriptor, 0);

  1119.             mxf_write_multi_descriptor(s);

  1120.         } else

  1121.             mxf_write_uuid(pb, SubDescriptor, 0);

  1122.     }

  1123. 

  1124.     // write timecode track

  1125.     mxf_write_track(s, mxf->timecode_track, type);

  1126.     mxf_write_sequence(s, mxf->timecode_track, type);

  1127.     mxf_write_timecode_component(s, mxf->timecode_track, type);

  1128. 

  1129.     for (i = 0; i < s->nb_streams; i++) {

  1130.         AVStream *st = s->streams[i];

  1131.         mxf_write_track(s, st, type);

  1132.         mxf_write_sequence(s, st, type);

  1133.         mxf_write_structural_component(s, st, type);

  1134. 

  1135.         if (type == SourcePackage) {

  1136.             MXFStreamContext *sc = st->priv_data;

  1137.             mxf_essence_container_uls[sc->index].write_desc(s, st);

  1138.         }

  1139.     }

  1140. }

  1141. 

  1142. static int mxf_write_essence_container_data(AVFormatContext *s)

  1143. {

  1144.     AVIOContext *pb = s->pb;

  1145. 

  1146.     mxf_write_metadata_key(pb, 0x012300);

  1147.     klv_encode_ber_length(pb, 72);

  1148. 

  1149.     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID

  1150.     mxf_write_uuid(pb, EssenceContainerData, 0);

  1151. 

  1152.     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID

  1153.     mxf_write_umid(s, 1);

  1154. 

  1155.     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID

  1156.     avio_wb32(pb, 1);

  1157. 

  1158.     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID

  1159.     avio_wb32(pb, 2);

  1160. 

  1161.     return 0;

  1162. }

  1163. 

  1164. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  1165. {

  1166.     mxf_write_preface(s);

  1167.     mxf_write_identification(s);

  1168.     mxf_write_content_storage(s);

  1169.     mxf_write_package(s, MaterialPackage);

  1170.     mxf_write_package(s, SourcePackage);

  1171.     mxf_write_essence_container_data(s);

  1172.     return 0;

  1173. }

  1174. 

  1175. static unsigned klv_fill_size(uint64_t size)

  1176. {

  1177.     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));

  1178.     if (pad < 20) // smallest fill item possible

  1179.         return pad + KAG_SIZE;

  1180.     else

  1181.         return pad & (KAG_SIZE-1);

  1182. }

  1183. 

  1184. static void mxf_write_index_table_segment(AVFormatContext *s)

  1185. {

  1186.     MXFContext *mxf = s->priv_data;

  1187.     AVIOContext *pb = s->pb;

  1188.     int i, j, temporal_reordering = 0;

  1189.     int key_index = mxf->last_key_index;

  1190. 

  1191.     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);

  1192. 

  1193.     if (!mxf->edit_units_count && !mxf->edit_unit_byte_count)

  1194.         return;

  1195. 

  1196.     avio_write(pb, index_table_segment_key, 16);

  1197. 

  1198.     if (mxf->edit_unit_byte_count) {

  1199.         klv_encode_ber_length(pb, 80);

  1200.     } else {

  1201.         klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1LL)*6 +

  1202.                               12+mxf->edit_units_count*(11+mxf->slice_count*4LL));

  1203.     }

  1204. 

  1205.     // instance id

  1206.     mxf_write_local_tag(pb, 16, 0x3C0A);

  1207.     mxf_write_uuid(pb, IndexTableSegment, 0);

  1208. 

  1209.     // index edit rate

  1210.     mxf_write_local_tag(pb, 8, 0x3F0B);

  1211.     avio_wb32(pb, mxf->time_base.den);

  1212.     avio_wb32(pb, mxf->time_base.num);

  1213. 

  1214.     // index start position

  1215.     mxf_write_local_tag(pb, 8, 0x3F0C);

  1216.     avio_wb64(pb, mxf->last_indexed_edit_unit);

  1217. 

  1218.     // index duration

  1219.     mxf_write_local_tag(pb, 8, 0x3F0D);

  1220.     if (mxf->edit_unit_byte_count)

  1221.         avio_wb64(pb, 0); // index table covers whole container

  1222.     else

  1223.         avio_wb64(pb, mxf->edit_units_count);

  1224. 

  1225.     // edit unit byte count

  1226.     mxf_write_local_tag(pb, 4, 0x3F05);

  1227.     avio_wb32(pb, mxf->edit_unit_byte_count);

  1228. 

  1229.     // index sid

  1230.     mxf_write_local_tag(pb, 4, 0x3F06);

  1231.     avio_wb32(pb, 2);

  1232. 

  1233.     // body sid

  1234.     mxf_write_local_tag(pb, 4, 0x3F07);

  1235.     avio_wb32(pb, 1);

  1236. 

  1237.     if (!mxf->edit_unit_byte_count) {

  1238.         // real slice count - 1

  1239.         mxf_write_local_tag(pb, 1, 0x3F08);

  1240.         avio_w8(pb, mxf->slice_count);

  1241. 

  1242.         // delta entry array

  1243.         mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);

  1244.         avio_wb32(pb, s->nb_streams+1); // num of entries

  1245.         avio_wb32(pb, 6);               // size of one entry

  1246.         // write system item delta entry

  1247.         avio_w8(pb, 0);

  1248.         avio_w8(pb, 0); // slice entry

  1249.         avio_wb32(pb, 0); // element delta

  1250.         for (i = 0; i < s->nb_streams; i++) {

  1251.             AVStream *st = s->streams[i];

  1252.             MXFStreamContext *sc = st->priv_data;

  1253.             avio_w8(pb, sc->temporal_reordering);

  1254.             if (sc->temporal_reordering)

  1255.                 temporal_reordering = 1;

  1256.             if (i == 0) { // video track

  1257.                 avio_w8(pb, 0); // slice number

  1258.                 avio_wb32(pb, KAG_SIZE); // system item size including klv fill

  1259.             } else { // audio track

  1260.                 unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;

  1261.                 audio_frame_size += klv_fill_size(audio_frame_size);

  1262.                 avio_w8(pb, 1);

  1263.                 avio_wb32(pb, (i-1)*audio_frame_size); // element delta

  1264.             }

  1265.         }

  1266. 

  1267.         mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);

  1268.         avio_wb32(pb, mxf->edit_units_count);  // num of entries

  1269.         avio_wb32(pb, 11+mxf->slice_count*4);  // size of one entry

  1270. 

  1271.         for (i = 0; i < mxf->edit_units_count; i++) {

  1272.             int temporal_offset = 0;

  1273. 

  1274.             if (!(mxf->index_entries[i].flags & 0x33)) { // I frame

  1275.                 mxf->last_key_index = key_index;

  1276.                 key_index = i;

  1277.             }

  1278. 

  1279.             if (temporal_reordering) {

  1280.                 int pic_num_in_gop = i - key_index;

  1281.                 if (pic_num_in_gop != mxf->index_entries[i].temporal_ref) {

  1282.                     for (j = key_index; j < mxf->edit_units_count; j++) {

  1283.                         if (pic_num_in_gop == mxf->index_entries[j].temporal_ref)

  1284.                             break;

  1285.                     }

  1286.                     if (j == mxf->edit_units_count)

  1287.                         av_log(s, AV_LOG_WARNING, "missing frames\n");

  1288.                     temporal_offset = j - key_index - pic_num_in_gop;

  1289.                 }

  1290.             }

  1291.             avio_w8(pb, temporal_offset);

  1292. 

  1293.             if ((mxf->index_entries[i].flags & 0x30) == 0x30) { // back and forward prediction

  1294.                 avio_w8(pb, mxf->last_key_index - i);

  1295.             } else {

  1296.                 avio_w8(pb, key_index - i); // key frame offset

  1297.                 if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward

  1298.                     mxf->last_key_index = key_index;

  1299.             }

  1300. 

  1301.             if (!(mxf->index_entries[i].flags & 0x33) && // I frame

  1302.                 mxf->index_entries[i].flags & 0x40 && !temporal_offset)

  1303.                 mxf->index_entries[i].flags |= 0x80; // random access

  1304.             avio_w8(pb, mxf->index_entries[i].flags);

  1305.             // stream offset

  1306.             avio_wb64(pb, mxf->index_entries[i].offset);

  1307.             if (s->nb_streams > 1)

  1308.                 avio_wb32(pb, mxf->index_entries[i].slice_offset);

  1309.         }

  1310. 

  1311.         mxf->last_key_index = key_index - mxf->edit_units_count;

  1312.         mxf->last_indexed_edit_unit += mxf->edit_units_count;

  1313.         mxf->edit_units_count = 0;

  1314.     }

  1315. }

  1316. 

  1317. static void mxf_write_klv_fill(AVFormatContext *s)

  1318. {

  1319.     unsigned pad = klv_fill_size(avio_tell(s->pb));

  1320.     if (pad) {

  1321.         avio_write(s->pb, klv_fill_key, 16);

  1322.         pad -= 16 + 4;

  1323.         klv_encode_ber4_length(s->pb, pad);

  1324.         ffio_fill(s->pb, 0, pad);

  1325.         av_assert1(!(avio_tell(s->pb) & (KAG_SIZE-1)));

  1326.     }

  1327. }

  1328. 

  1329. static int mxf_write_partition(AVFormatContext *s, int bodysid,

  1330.                                 int indexsid,

  1331.                                 const uint8_t *key, int write_metadata)

  1332. {

  1333.     MXFContext *mxf = s->priv_data;

  1334.     AVIOContext *pb = s->pb;

  1335.     int64_t header_byte_count_offset;

  1336.     unsigned index_byte_count = 0;

  1337.     uint64_t partition_offset = avio_tell(pb);

  1338.     int err;

  1339. 

  1340.     if (!mxf->edit_unit_byte_count && mxf->edit_units_count)

  1341.         index_byte_count = 85 + 12+(s->nb_streams+1)*6 +

  1342.             12+mxf->edit_units_count*(11+mxf->slice_count*4);

  1343.     else if (mxf->edit_unit_byte_count && indexsid)

  1344.         index_byte_count = 80;

  1345. 

  1346.     if (index_byte_count) {

  1347.         // add encoded ber length

  1348.         index_byte_count += 16 + klv_ber_length(index_byte_count);

  1349.         index_byte_count += klv_fill_size(index_byte_count);

  1350.     }

  1351. 

  1352.     if (!memcmp(key, body_partition_key, 16)) {

  1353.         if ((err = av_reallocp_array(&mxf->body_partition_offset, mxf->body_partitions_count + 1,

  1354.                                      sizeof(*mxf->body_partition_offset))) < 0) {

  1355.             mxf->body_partitions_count = 0;

  1356.             return err;

  1357.         }

  1358.         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;

  1359.     }

  1360. 

  1361.     // write klv

  1362.     avio_write(pb, key, 16);

  1363.     klv_encode_ber_length(pb, 88 + 16LL * DESCRIPTOR_COUNT(mxf->essence_container_count));

  1364. 

  1365.     // write partition value

  1366.     avio_wb16(pb, 1); // majorVersion

  1367.     avio_wb16(pb, 2); // minorVersion

  1368.     avio_wb32(pb, KAG_SIZE); // KAGSize

  1369. 

  1370.     avio_wb64(pb, partition_offset); // ThisPartition

  1371. 

  1372.     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)

  1373.         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition

  1374.     else if (!memcmp(key, footer_partition_key, 16) && mxf->body_partitions_count)

  1375.         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition

  1376.     else

  1377.         avio_wb64(pb, 0);

  1378. 

  1379.     avio_wb64(pb, mxf->footer_partition_offset); // footerPartition

  1380. 

  1381.     // set offset

  1382.     header_byte_count_offset = avio_tell(pb);

  1383.     avio_wb64(pb, 0); // headerByteCount, update later

  1384. 

  1385.     // indexTable

  1386.     avio_wb64(pb, index_byte_count); // indexByteCount

  1387.     avio_wb32(pb, index_byte_count ? indexsid : 0); // indexSID

  1388. 

  1389.     // BodyOffset

  1390.     if (bodysid && mxf->edit_units_count && mxf->body_partitions_count) {

  1391.         avio_wb64(pb, mxf->body_offset);

  1392.     } else

  1393.         avio_wb64(pb, 0);

  1394. 

  1395.     avio_wb32(pb, bodysid); // bodySID

  1396. 

  1397.     // operational pattern

  1398.     avio_write(pb, op1a_ul, 16);

  1399. 

  1400.     // essence container

  1401.     mxf_write_essence_container_refs(s);

  1402. 

  1403.     if (write_metadata) {

  1404.         // mark the start of the headermetadata and calculate metadata size

  1405.         int64_t pos, start;

  1406.         unsigned header_byte_count;

  1407. 

  1408.         mxf_write_klv_fill(s);

  1409.         start = avio_tell(s->pb);

  1410.         mxf_write_primer_pack(s);

  1411.         mxf_write_header_metadata_sets(s);

  1412.         pos = avio_tell(s->pb);

  1413.         header_byte_count = pos - start + klv_fill_size(pos);

  1414. 

  1415.         // update header_byte_count

  1416.         avio_seek(pb, header_byte_count_offset, SEEK_SET);

  1417.         avio_wb64(pb, header_byte_count);

  1418.         avio_seek(pb, pos, SEEK_SET);

  1419.     }

  1420. 

  1421.     avio_flush(pb);

  1422. 

  1423.     return 0;

  1424. }

  1425. 

  1426. static int mxf_parse_dnxhd_frame(AVFormatContext *s, AVStream *st,

  1427. AVPacket *pkt)

  1428. {

  1429.     MXFContext *mxf = s->priv_data;

  1430.     MXFStreamContext *sc = st->priv_data;

  1431.     int i, cid;

  1432.     uint8_t* header_cid;

  1433.     int frame_size = 0;

  1434. 

  1435.     if (mxf->header_written)

  1436.         return 1;

  1437. 

  1438.     if (pkt->size < 43)

  1439.         return -1;

  1440. 

  1441.     header_cid = pkt->data + 0x28;

  1442.     cid = header_cid[0] << 24 | header_cid[1] << 16 | header_cid[2] << 8 | header_cid[3];

  1443. 

  1444.     if ((frame_size = avpriv_dnxhd_get_frame_size(cid)) < 0)

  1445.         return -1;

  1446. 

  1447.     switch (cid) {

  1448.     case 1235:

  1449.         sc->index = 24;

  1450.         sc->component_depth = 10;

  1451.         break;

  1452.     case 1237:

  1453.         sc->index = 25;

  1454.         break;

  1455.     case 1238:

  1456.         sc->index = 26;

  1457.         break;

  1458.     case 1241:

  1459.         sc->index = 27;

  1460.         sc->component_depth = 10;

  1461.         break;

  1462.     case 1242:

  1463.         sc->index = 28;

  1464.         break;

  1465.     case 1243:

  1466.         sc->index = 29;

  1467.         break;

  1468.     case 1250:

  1469.         sc->index = 30;

  1470.         sc->component_depth = 10;

  1471.         break;

  1472.     case 1251:

  1473.         sc->index = 31;

  1474.         break;

  1475.     case 1252:

  1476.         sc->index = 32;

  1477.         break;

  1478.     case 1253:

  1479.         sc->index = 33;

  1480.         break;

  1481.     default:

  1482.         return -1;

  1483.     }

  1484. 

  1485.     sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;

  1486.     sc->aspect_ratio = (AVRational){ 16, 9 };

  1487. 

  1488.     mxf->edit_unit_byte_count = KAG_SIZE;

  1489.     for (i = 0; i < s->nb_streams; i++) {

  1490.         AVStream *st = s->streams[i];

  1491.         MXFStreamContext *sc = st->priv_data;

  1492.         if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

  1493.             mxf->edit_unit_byte_count += 16 + 4 + sc->aic.samples[0]*sc->aic.sample_size;

  1494.             mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1495.         } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  1496.             mxf->edit_unit_byte_count += 16 + 4 + frame_size;

  1497.             mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1498.         }

  1499.     }

  1500. 

  1501.     return 1;

  1502. }

  1503. 

  1504. static int mxf_parse_dv_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1505. {

  1506.     MXFContext *mxf = s->priv_data;

  1507.     MXFStreamContext *sc = st->priv_data;

  1508.     uint8_t *vs_pack, *vsc_pack;

  1509.     int i, ul_index, frame_size, stype, pal;

  1510. 

  1511.     if (mxf->header_written)

  1512.         return 1;

  1513. 

  1514.     // Check for minimal frame size

  1515.     if (pkt->size < 120000)

  1516.         return -1;

  1517. 

  1518.     vs_pack  = pkt->data + 80*5 + 48;

  1519.     vsc_pack = pkt->data + 80*5 + 53;

  1520.     stype    = vs_pack[3] & 0x1f;

  1521.     pal      = (vs_pack[3] >> 5) & 0x1;

  1522. 

  1523.     if ((vs_pack[2] & 0x07) == 0x02)

  1524.         sc->aspect_ratio = (AVRational){ 16, 9 };

  1525.     else

  1526.         sc->aspect_ratio = (AVRational){ 4, 3 };

  1527. 

  1528.     sc->interlaced = (vsc_pack[3] >> 4) & 0x01;

  1529.     // TODO: fix dv encoder to set proper FF/FS value in VSC pack

  1530.     // and set field dominance accordingly

  1531.     // av_log(s, AV_LOG_DEBUG, "DV vsc pack ff/ss = %x\n", vsc_pack[2] >> 6);

  1532. 

  1533.     switch (stype) {

  1534.     case 0x18: // DV100 720p

  1535.         ul_index = 6 + pal;

  1536.         frame_size = pal ? 288000 : 240000;

  1537.         if (sc->interlaced) {

  1538.             av_log(s, AV_LOG_ERROR, "source marked as interlaced but codec profile is progressive\n");

  1539.             sc->interlaced = 0;

  1540.         }

  1541.         break;

  1542.     case 0x14: // DV100 1080i

  1543.         ul_index = 4 + pal;

  1544.         frame_size = pal ? 576000 : 480000;

  1545.         break;

  1546.     case 0x04: // DV50

  1547.         ul_index = 2 + pal;

  1548.         frame_size = pal ? 288000 : 240000;

  1549.         break;

  1550.     default: // DV25

  1551.         ul_index = 0 + pal;

  1552.         frame_size = pal ? 144000 : 120000;

  1553.     }

  1554. 

  1555.     sc->index = ul_index + 16;

  1556.     sc->codec_ul =  &mxf_essence_container_uls[sc->index].codec_ul;

  1557. 

  1558.     mxf->edit_unit_byte_count = KAG_SIZE;

  1559.     for (i = 0; i < s->nb_streams; i++) {

  1560.         AVStream *st = s->streams[i];

  1561.         MXFStreamContext *sc = st->priv_data;

  1562.         if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

  1563.             mxf->edit_unit_byte_count += 16 + 4 + sc->aic.samples[0]*sc->aic.sample_size;

  1564.             mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1565.         } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  1566.             mxf->edit_unit_byte_count += 16 + 4 + frame_size;

  1567.             mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1568.         }

  1569.     }

  1570. 

  1571.     return 1;

  1572. }

  1573. 

  1574. static const UID mxf_mpeg2_codec_uls[] = {

  1575.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame

  1576.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP

  1577.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame

  1578.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP

  1579.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame

  1580.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP

  1581.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame

  1582.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP

  1583.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x05,0x02,0x00 }, // MP@H-14 I-Frame

  1584.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x05,0x03,0x00 }, // MP@H-14 Long GOP

  1585. };

  1586. 

  1587. static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)

  1588. {

  1589.     int long_gop = avctx->gop_size > 1 || avctx->has_b_frames;

  1590. 

  1591.     if (avctx->profile == 4) { // Main

  1592.         if (avctx->level == 8) // Main

  1593.             return &mxf_mpeg2_codec_uls[0+long_gop];

  1594.         else if (avctx->level == 4) // High

  1595.             return &mxf_mpeg2_codec_uls[4+long_gop];

  1596.         else if (avctx->level == 6) // High 14

  1597.             return &mxf_mpeg2_codec_uls[8+long_gop];

  1598.     } else if (avctx->profile == 0) { // 422

  1599.         if (avctx->level == 5) // Main

  1600.             return &mxf_mpeg2_codec_uls[2+long_gop];

  1601.         else if (avctx->level == 2) // High

  1602.             return &mxf_mpeg2_codec_uls[6+long_gop];

  1603.     }

  1604.     return NULL;

  1605. }

  1606. 

  1607. static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st,

  1608.                                  AVPacket *pkt, MXFIndexEntry *e)

  1609. {

  1610.     MXFStreamContext *sc = st->priv_data;

  1611.     uint32_t c = -1;

  1612.     int i;

  1613. 

  1614.     for(i = 0; i < pkt->size - 4; i++) {

  1615.         c = (c<<8) + pkt->data[i];

  1616.         if (c == 0x1b5) {

  1617.             if ((pkt->data[i+1] & 0xf0) == 0x10) { // seq ext

  1618.                 st->codec->profile = pkt->data[i+1] & 0x07;

  1619.                 st->codec->level   = pkt->data[i+2] >> 4;

  1620.             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext

  1621.                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame

  1622.                 if (sc->interlaced)

  1623.                     sc->field_dominance = 1 + !(pkt->data[i+4] & 0x80); // top field first

  1624.                 break;

  1625.             }

  1626.         } else if (c == 0x1b8) { // gop

  1627.             if (pkt->data[i+4]>>6 & 0x01) { // closed

  1628.                 sc->closed_gop = 1;

  1629.                 if (e->flags & 0x40) // sequence header present

  1630.                     e->flags |= 0x80; // random access

  1631.             }

  1632.         } else if (c == 0x1b3) { // seq

  1633.             e->flags |= 0x40;

  1634.             switch ((pkt->data[i+4]>>4) & 0xf) {

  1635.             case 2:  sc->aspect_ratio = (AVRational){  4,  3}; break;

  1636.             case 3:  sc->aspect_ratio = (AVRational){ 16,  9}; break;

  1637.             case 4:  sc->aspect_ratio = (AVRational){221,100}; break;

  1638.             default:

  1639.                 av_reduce(&sc->aspect_ratio.num, &sc->aspect_ratio.den,

  1640.                           st->codec->width, st->codec->height, 1024*1024);

  1641.             }

  1642.         } else if (c == 0x100) { // pic

  1643.             int pict_type = (pkt->data[i+2]>>3) & 0x07;

  1644.             e->temporal_ref = (pkt->data[i+1]<<2) | (pkt->data[i+2]>>6);

  1645.             if (pict_type == 2) { // P frame

  1646.                 e->flags |= 0x22;

  1647.                 sc->closed_gop = 0; // reset closed gop, don't matter anymore

  1648.             } else if (pict_type == 3) { // B frame

  1649.                 if (sc->closed_gop)

  1650.                     e->flags |= 0x13; // only backward prediction

  1651.                 else

  1652.                     e->flags |= 0x33;

  1653.                 sc->temporal_reordering = -1;

  1654.             } else if (!pict_type) {

  1655.                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");

  1656.                 return 0;

  1657.             }

  1658.         }

  1659.     }

  1660.     if (s->oformat != &ff_mxf_d10_muxer)

  1661.         sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);

  1662.     return !!sc->codec_ul;

  1663. }

  1664. 

  1665. static uint64_t mxf_parse_timestamp(time_t timestamp)

  1666. {

  1667.     struct tm *time = gmtime(&timestamp);

  1668.     if (!time)

  1669.         return 0;

  1670.     return (uint64_t)(time->tm_year+1900) << 48 |

  1671.            (uint64_t)(time->tm_mon+1)     << 40 |

  1672.            (uint64_t) time->tm_mday       << 32 |

  1673.                       time->tm_hour       << 24 |

  1674.                       time->tm_min        << 16 |

  1675.                       time->tm_sec        << 8;

  1676. }

  1677. 

  1678. static void mxf_gen_umid(AVFormatContext *s)

  1679. {

  1680.     MXFContext *mxf = s->priv_data;

  1681.     uint32_t seed = av_get_random_seed();

  1682.     uint64_t umid = seed + 0x5294713400000000LL;

  1683. 

  1684.     AV_WB64(mxf->umid  , umid);

  1685.     AV_WB64(mxf->umid+8, umid>>8);

  1686. 

  1687.     mxf->instance_number = seed & 0xFFFFFF;

  1688. }

  1689. 

  1690. static int mxf_write_header(AVFormatContext *s)

  1691. {

  1692.     MXFContext *mxf = s->priv_data;

  1693.     int i, ret;

  1694.     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};

  1695.     const MXFSamplesPerFrame *spf = NULL;

  1696.     AVDictionaryEntry *t;

  1697.     int64_t timestamp = 0;

  1698.     AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0);

  1699. 

  1700.     if (!s->nb_streams)

  1701.         return -1;

  1702. 

  1703.     for (i = 0; i < s->nb_streams; i++) {

  1704.         AVStream *st = s->streams[i];

  1705.         MXFStreamContext *sc = av_mallocz(sizeof(*sc));

  1706.         if (!sc)

  1707.             return AVERROR(ENOMEM);

  1708.         st->priv_data = sc;

  1709. 

  1710.         if ((i == 0) ^ (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)) {

  1711.             av_log(s, AV_LOG_ERROR, "there must be exactly one video stream and it must be the first one\n");

  1712.             return -1;

  1713.         }

  1714. 

  1715.         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  1716.             // TODO: should be avg_frame_rate

  1717.             AVRational rate, tbc = st->time_base;

  1718.             // Default component depth to 8

  1719.             sc->component_depth = 8;

  1720.             mxf->timecode_base = (tbc.den + tbc.num/2) / tbc.num;

  1721.             spf = ff_mxf_get_samples_per_frame(s, tbc);

  1722.             if (!spf) {

  1723.                 av_log(s, AV_LOG_ERROR, "Unsupported video frame rate %d/%d\n",

  1724.                        tbc.den, tbc.num);

  1725.                 return AVERROR(EINVAL);

  1726.             }

  1727.             mxf->time_base = spf->time_base;

  1728.             rate = av_inv_q(mxf->time_base);

  1729.             avpriv_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);

  1730.             if (!tcr)

  1731.                 tcr = av_dict_get(st->metadata, "timecode", NULL, 0);

  1732.             if (tcr)

  1733.                 ret = av_timecode_init_from_string(&mxf->tc, rate, tcr->value, s);

  1734.             else

  1735.                 ret = av_timecode_init(&mxf->tc, rate, 0, 0, s);

  1736.             if (ret < 0)

  1737.                 return ret;

  1738.             sc->video_bit_rate = st->codec->bit_rate ? st->codec->bit_rate : st->codec->rc_max_rate;

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

  1740.                 if (sc->video_bit_rate == 50000000) {

  1741.                     if (mxf->time_base.den == 25) sc->index = 3;

  1742.                     else                          sc->index = 5;

  1743.                 } else if (sc->video_bit_rate == 40000000) {

  1744.                     if (mxf->time_base.den == 25) sc->index = 7;

  1745.                     else                          sc->index = 9;

  1746.                 } else if (sc->video_bit_rate == 30000000) {

  1747.                     if (mxf->time_base.den == 25) sc->index = 11;

  1748.                     else                          sc->index = 13;

  1749.                 } else {

  1750.                     av_log(s, AV_LOG_ERROR, "error MXF D-10 only support 30/40/50 mbit/s\n");

  1751.                     return -1;

  1752.                 }

  1753. 

  1754.                 mxf->edit_unit_byte_count = KAG_SIZE; // system element

  1755.                 mxf->edit_unit_byte_count += 16 + 4 + (uint64_t)sc->video_bit_rate *

  1756.                     mxf->time_base.num / (8*mxf->time_base.den);

  1757.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1758.                 mxf->edit_unit_byte_count += 16 + 4 + 4 + spf->samples_per_frame[0]*8*4;

  1759.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1760.             }

  1761.         } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

  1762.             if (st->codec->sample_rate != 48000) {

  1763.                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");

  1764.                 return -1;

  1765.             }

  1766.             avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);

  1767.             if (s->oformat == &ff_mxf_d10_muxer) {

  1768.                 if (st->index != 1) {

  1769.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support one audio track\n");

  1770.                     return -1;

  1771.                 }

  1772.                 if (st->codec->codec_id != AV_CODEC_ID_PCM_S16LE &&

  1773.                     st->codec->codec_id != AV_CODEC_ID_PCM_S24LE) {

  1774.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support 16 or 24 bits le audio\n");

  1775.                 }

  1776.                 sc->index = ((MXFStreamContext*)s->streams[0]->priv_data)->index + 1;

  1777.             } else

  1778.             mxf->slice_count = 1;

  1779.         }

  1780. 

  1781.         if (!sc->index) {

  1782.             sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);

  1783.             if (sc->index == -1) {

  1784.                 av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "

  1785.                        "codec not currently supported in container\n", i);

  1786.                 return -1;

  1787.             }

  1788.         }

  1789. 

  1790.         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;

  1791. 

  1792.         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);

  1793.         sc->track_essence_element_key[15] = present[sc->index];

  1794.         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);

  1795. 

  1796.         if (!present[sc->index])

  1797.             mxf->essence_container_count++;

  1798.         present[sc->index]++;

  1799.     }

  1800. 

  1801.     if (s->oformat == &ff_mxf_d10_muxer) {

  1802.         mxf->essence_container_count = 1;

  1803.     }

  1804. 

  1805.     if (!(s->flags & AVFMT_FLAG_BITEXACT))

  1806.         mxf_gen_umid(s);

  1807. 

  1808.     for (i = 0; i < s->nb_streams; i++) {

  1809.         MXFStreamContext *sc = s->streams[i]->priv_data;

  1810.         // update element count

  1811.         sc->track_essence_element_key[13] = present[sc->index];

  1812.         if (!memcmp(sc->track_essence_element_key, mxf_essence_container_uls[15].element_ul, 13)) // DV

  1813.             sc->order = (0x15 << 24) | AV_RB32(sc->track_essence_element_key+13);

  1814.         else

  1815.             sc->order = AV_RB32(sc->track_essence_element_key+12);

  1816.     }

  1817. 

  1818.     if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))

  1819.         timestamp = ff_iso8601_to_unix_time(t->value);

  1820.     if (timestamp)

  1821.         mxf->timestamp = mxf_parse_timestamp(timestamp);

  1822.     mxf->duration = -1;

  1823. 

  1824.     mxf->timecode_track = av_mallocz(sizeof(*mxf->timecode_track));

  1825.     if (!mxf->timecode_track)

  1826.         return AVERROR(ENOMEM);

  1827.     mxf->timecode_track->priv_data = av_mallocz(sizeof(MXFStreamContext));

  1828.     if (!mxf->timecode_track->priv_data)

  1829.         return AVERROR(ENOMEM);

  1830.     mxf->timecode_track->index = -1;

  1831. 

  1832.     if (!spf)

  1833.         spf = ff_mxf_get_samples_per_frame(s, (AVRational){ 1, 25 });

  1834. 

  1835.     if (ff_audio_interleave_init(s, spf->samples_per_frame, mxf->time_base) < 0)

  1836.         return -1;

  1837. 

  1838.     return 0;

  1839. }

  1840. 

  1841. static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };

  1842. 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 };

  1843. 

  1844. static void mxf_write_system_item(AVFormatContext *s)

  1845. {

  1846.     MXFContext *mxf = s->priv_data;

  1847.     AVIOContext *pb = s->pb;

  1848.     unsigned frame;

  1849.     uint32_t time_code;

  1850. 

  1851.     frame = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  1852. 

  1853.     // write system metadata pack

  1854.     avio_write(pb, system_metadata_pack_key, 16);

  1855.     klv_encode_ber4_length(pb, 57);

  1856.     avio_w8(pb, 0x5c); // UL, user date/time stamp, picture and sound item present

  1857.     avio_w8(pb, 0x04); // content package rate

  1858.     avio_w8(pb, 0x00); // content package type

  1859.     avio_wb16(pb, 0x00); // channel handle

  1860.     avio_wb16(pb, (mxf->tc.start + frame) & 0xFFFF); // continuity count, supposed to overflow

  1861.     if (mxf->essence_container_count > 1)

  1862.         avio_write(pb, multiple_desc_ul, 16);

  1863.     else {

  1864.         MXFStreamContext *sc = s->streams[0]->priv_data;

  1865.         avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);

  1866.     }

  1867.     avio_w8(pb, 0);

  1868.     avio_wb64(pb, 0);

  1869.     avio_wb64(pb, 0); // creation date/time stamp

  1870. 

  1871.     avio_w8(pb, 0x81); // SMPTE 12M time code

  1872.     time_code = av_timecode_get_smpte_from_framenum(&mxf->tc, frame);

  1873.     avio_wb32(pb, time_code);

  1874.     avio_wb32(pb, 0); // binary group data

  1875.     avio_wb64(pb, 0);

  1876. 

  1877.     // write system metadata package set

  1878.     avio_write(pb, system_metadata_package_set_key, 16);

  1879.     klv_encode_ber4_length(pb, 35);

  1880.     avio_w8(pb, 0x83); // UMID

  1881.     avio_wb16(pb, 0x20);

  1882.     mxf_write_umid(s, 1);

  1883. }

  1884. 

  1885. static void mxf_write_d10_video_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1886. {

  1887.     MXFContext *mxf = s->priv_data;

  1888.     AVIOContext *pb = s->pb;

  1889.     MXFStreamContext *sc = st->priv_data;

  1890.     int packet_size = (uint64_t)sc->video_bit_rate*mxf->time_base.num /

  1891.         (8*mxf->time_base.den); // frame size

  1892.     int pad;

  1893. 

  1894.     packet_size += 16 + 4;

  1895.     packet_size += klv_fill_size(packet_size);

  1896. 

  1897.     klv_encode_ber4_length(pb, pkt->size);

  1898.     avio_write(pb, pkt->data, pkt->size);

  1899. 

  1900.     // ensure CBR muxing by padding to correct video frame size

  1901.     pad = packet_size - pkt->size - 16 - 4;

  1902.     if (pad > 20) {

  1903.         avio_write(s->pb, klv_fill_key, 16);

  1904.         pad -= 16 + 4;

  1905.         klv_encode_ber4_length(s->pb, pad);

  1906.         ffio_fill(s->pb, 0, pad);

  1907.         av_assert1(!(avio_tell(s->pb) & (KAG_SIZE-1)));

  1908.     } else {

  1909.         av_log(s, AV_LOG_WARNING, "cannot fill d-10 video packet\n");

  1910.         ffio_fill(s->pb, 0, pad);

  1911.     }

  1912. }

  1913. 

  1914. static void mxf_write_d10_audio_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1915. {

  1916.     MXFContext *mxf = s->priv_data;

  1917.     AVIOContext *pb = s->pb;

  1918.     int frame_size = pkt->size / st->codec->block_align;

  1919.     uint8_t *samples = pkt->data;

  1920.     uint8_t *end = pkt->data + pkt->size;

  1921.     int i;

  1922. 

  1923.     klv_encode_ber4_length(pb, 4 + frame_size*4*8);

  1924. 

  1925.     avio_w8(pb, (frame_size == 1920 ? 0 : (mxf->edit_units_count-1) % 5 + 1));

  1926.     avio_wl16(pb, frame_size);

  1927.     avio_w8(pb, (1<<st->codec->channels)-1);

  1928. 

  1929.     while (samples < end) {

  1930.         for (i = 0; i < st->codec->channels; i++) {

  1931.             uint32_t sample;

  1932.             if (st->codec->codec_id == AV_CODEC_ID_PCM_S24LE) {

  1933.                 sample = AV_RL24(samples)<< 4;

  1934.                 samples += 3;

  1935.             } else {

  1936.                 sample = AV_RL16(samples)<<12;

  1937.                 samples += 2;

  1938.             }

  1939.             avio_wl32(pb, sample | i);

  1940.         }

  1941.         for (; i < 8; i++)

  1942.             avio_wl32(pb, i);

  1943.     }

  1944. }

  1945. 

  1946. static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)

  1947. {

  1948.     MXFContext *mxf = s->priv_data;

  1949.     AVIOContext *pb = s->pb;

  1950.     AVStream *st = s->streams[pkt->stream_index];

  1951.     MXFStreamContext *sc = st->priv_data;

  1952.     MXFIndexEntry ie = {0};

  1953.     int err;

  1954. 

  1955.     if (!mxf->edit_unit_byte_count && !(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {

  1956.         if ((err = av_reallocp_array(&mxf->index_entries, mxf->edit_units_count

  1957.                                      + EDIT_UNITS_PER_BODY, sizeof(*mxf->index_entries))) < 0) {

  1958.             mxf->edit_units_count = 0;

  1959.             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");

  1960.             return err;

  1961.         }

  1962.     }

  1963. 

  1964.     if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO) {

  1965.         if (!mxf_parse_mpeg2_frame(s, st, pkt, &ie)) {

  1966.             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");

  1967.             return -1;

  1968.         }

  1969.     } else if (st->codec->codec_id == AV_CODEC_ID_DNXHD) {

  1970.         if (!mxf_parse_dnxhd_frame(s, st, pkt)) {

  1971.             av_log(s, AV_LOG_ERROR, "could not get dnxhd profile\n");

  1972.             return -1;

  1973.         }

  1974.     } else if (st->codec->codec_id == AV_CODEC_ID_DVVIDEO) {

  1975.         if (!mxf_parse_dv_frame(s, st, pkt)) {

  1976.             av_log(s, AV_LOG_ERROR, "could not get dv profile\n");

  1977.             return -1;

  1978.         }

  1979.     }

  1980. 

  1981.     if (!mxf->header_written) {

  1982.         if (mxf->edit_unit_byte_count) {

  1983.             if ((err = mxf_write_partition(s, 1, 2, header_open_partition_key, 1)) < 0)

  1984.                 return err;

  1985.             mxf_write_klv_fill(s);

  1986.             mxf_write_index_table_segment(s);

  1987.         } else {

  1988.             if ((err = mxf_write_partition(s, 0, 0, header_open_partition_key, 1)) < 0)

  1989.                 return err;

  1990.         }

  1991.         mxf->header_written = 1;

  1992.     }

  1993. 

  1994.     if (st->index == 0) {

  1995.         if (!mxf->edit_unit_byte_count &&

  1996.             (!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&

  1997.             !(ie.flags & 0x33)) { // I frame, Gop start

  1998.             mxf_write_klv_fill(s);

  1999.             if ((err = mxf_write_partition(s, 1, 2, body_partition_key, 0)) < 0)

  2000.                 return err;

  2001.             mxf_write_klv_fill(s);

  2002.             mxf_write_index_table_segment(s);

  2003.         }

  2004. 

  2005.         mxf_write_klv_fill(s);

  2006.         mxf_write_system_item(s);

  2007. 

  2008.         if (!mxf->edit_unit_byte_count) {

  2009.             mxf->index_entries[mxf->edit_units_count].offset = mxf->body_offset;

  2010.             mxf->index_entries[mxf->edit_units_count].flags = ie.flags;

  2011.             mxf->index_entries[mxf->edit_units_count].temporal_ref = ie.temporal_ref;

  2012.             mxf->body_offset += KAG_SIZE; // size of system element

  2013.         }

  2014.         mxf->edit_units_count++;

  2015.     } else if (!mxf->edit_unit_byte_count && st->index == 1) {

  2016.         mxf->index_entries[mxf->edit_units_count-1].slice_offset =

  2017.             mxf->body_offset - mxf->index_entries[mxf->edit_units_count-1].offset;

  2018.     }

  2019. 

  2020.     mxf_write_klv_fill(s);

  2021.     avio_write(pb, sc->track_essence_element_key, 16); // write key

  2022.     if (s->oformat == &ff_mxf_d10_muxer) {

  2023.         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)

  2024.             mxf_write_d10_video_packet(s, st, pkt);

  2025.         else

  2026.             mxf_write_d10_audio_packet(s, st, pkt);

  2027.     } else {

  2028.         klv_encode_ber4_length(pb, pkt->size); // write length

  2029.         avio_write(pb, pkt->data, pkt->size);

  2030.         mxf->body_offset += 16+4+pkt->size + klv_fill_size(16+4+pkt->size);

  2031.     }

  2032. 

  2033.     avio_flush(pb);

  2034. 

  2035.     return 0;

  2036. }

  2037. 

  2038. static void mxf_write_random_index_pack(AVFormatContext *s)

  2039. {

  2040.     MXFContext *mxf = s->priv_data;

  2041.     AVIOContext *pb = s->pb;

  2042.     uint64_t pos = avio_tell(pb);

  2043.     int i;

  2044. 

  2045.     avio_write(pb, random_index_pack_key, 16);

  2046.     klv_encode_ber_length(pb, 28 + 12LL*mxf->body_partitions_count);

  2047. 

  2048.     if (mxf->edit_unit_byte_count)

  2049.         avio_wb32(pb, 1); // BodySID of header partition

  2050.     else

  2051.         avio_wb32(pb, 0);

  2052.     avio_wb64(pb, 0); // offset of header partition

  2053. 

  2054.     for (i = 0; i < mxf->body_partitions_count; i++) {

  2055.         avio_wb32(pb, 1); // BodySID

  2056.         avio_wb64(pb, mxf->body_partition_offset[i]);

  2057.     }

  2058. 

  2059.     avio_wb32(pb, 0); // BodySID of footer partition

  2060.     avio_wb64(pb, mxf->footer_partition_offset);

  2061. 

  2062.     avio_wb32(pb, avio_tell(pb) - pos + 4);

  2063. }

  2064. 

  2065. static int mxf_write_footer(AVFormatContext *s)

  2066. {

  2067.     MXFContext *mxf = s->priv_data;

  2068.     AVIOContext *pb = s->pb;

  2069.     int err;

  2070. 

  2071.     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  2072. 

  2073.     mxf_write_klv_fill(s);

  2074.     mxf->footer_partition_offset = avio_tell(pb);

  2075.     if (mxf->edit_unit_byte_count) { // no need to repeat index

  2076.         if ((err = mxf_write_partition(s, 0, 0, footer_partition_key, 0)) < 0)

  2077.             return err;

  2078.     } else {

  2079.         if ((err = mxf_write_partition(s, 0, 2, footer_partition_key, 0)) < 0)

  2080.             return err;

  2081.         mxf_write_klv_fill(s);

  2082.         mxf_write_index_table_segment(s);

  2083.     }

  2084. 

  2085.     mxf_write_klv_fill(s);

  2086.     mxf_write_random_index_pack(s);

  2087. 

  2088.     if (s->pb->seekable) {

  2089.         avio_seek(pb, 0, SEEK_SET);

  2090.         if (mxf->edit_unit_byte_count) {

  2091.             if ((err = mxf_write_partition(s, 1, 2, header_closed_partition_key, 1)) < 0)

  2092.                 return err;

  2093.             mxf_write_klv_fill(s);

  2094.             mxf_write_index_table_segment(s);

  2095.         } else {

  2096.             if ((err = mxf_write_partition(s, 0, 0, header_closed_partition_key, 1)) < 0)

  2097.                 return err;

  2098.         }

  2099.     }

  2100. 

  2101.     ff_audio_interleave_close(s);

  2102. 

  2103.     av_freep(&mxf->index_entries);

  2104.     av_freep(&mxf->body_partition_offset);

  2105.     av_freep(&mxf->timecode_track->priv_data);

  2106.     av_freep(&mxf->timecode_track);

  2107. 

  2108.     mxf_free(s);

  2109. 

  2110.     return 0;

  2111. }

  2112. 

  2113. static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  2114. {

  2115.     int i, stream_count = 0;

  2116. 

  2117.     for (i = 0; i < s->nb_streams; i++)

  2118.         stream_count += !!s->streams[i]->last_in_packet_buffer;

  2119. 

  2120.     if (stream_count && (s->nb_streams == stream_count || flush)) {

  2121.         AVPacketList *pktl = s->packet_buffer;

  2122.         if (s->nb_streams != stream_count) {

  2123.             AVPacketList *last = NULL;

  2124.             // find last packet in edit unit

  2125.             while (pktl) {

  2126.                 if (!stream_count || pktl->pkt.stream_index == 0)

  2127.                     break;

  2128.                 last = pktl;

  2129.                 pktl = pktl->next;

  2130.                 stream_count--;

  2131.             }

  2132.             // purge packet queue

  2133.             while (pktl) {

  2134.                 AVPacketList *next = pktl->next;

  2135. 

  2136.                 if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)

  2137.                     s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;

  2138.                 av_free_packet(&pktl->pkt);

  2139.                 av_freep(&pktl);

  2140.                 pktl = next;

  2141.             }

  2142.             if (last)

  2143.                 last->next = NULL;

  2144.             else {

  2145.                 s->packet_buffer = NULL;

  2146.                 s->packet_buffer_end= NULL;

  2147.                 goto out;

  2148.             }

  2149.             pktl = s->packet_buffer;

  2150.         }

  2151. 

  2152.         *out = pktl->pkt;

  2153.         av_dlog(s, "out st:%d dts:%"PRId64"\n", (*out).stream_index, (*out).dts);

  2154.         s->packet_buffer = pktl->next;

  2155.         if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)

  2156.             s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;

  2157.         if(!s->packet_buffer)

  2158.             s->packet_buffer_end= NULL;

  2159.         av_freep(&pktl);

  2160.         return 1;

  2161.     } else {

  2162.     out:

  2163.         av_init_packet(out);

  2164.         return 0;

  2165.     }

  2166. }

  2167. 

  2168. static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)

  2169. {

  2170.     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;

  2171.     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;

  2172. 

  2173.     return next->dts > pkt->dts ||

  2174.         (next->dts == pkt->dts && sc->order < sc2->order);

  2175. }

  2176. 

  2177. static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  2178. {

  2179.     return ff_audio_rechunk_interleave(s, out, pkt, flush,

  2180.                                mxf_interleave_get_packet, mxf_compare_timestamps);

  2181. }

  2182. 

  2183. static const AVOption d10_options[] = {

  2184.     { "d10_channelcount", "Force/set channelcount in generic sound essence descriptor",

  2185.       offsetof(MXFContext, channel_count), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 8, AV_OPT_FLAG_ENCODING_PARAM},

  2186.     { NULL },

  2187. };

  2188. 

  2189. static const AVClass mxf_d10_muxer_class = {

  2190.     .class_name     = "MXF-D10 muxer",

  2191.     .item_name      = av_default_item_name,

  2192.     .option         = d10_options,

  2193.     .version        = LIBAVUTIL_VERSION_INT,

  2194. };

  2195. 

  2196. AVOutputFormat ff_mxf_muxer = {

  2197.     .name              = "mxf",

  2198.     .long_name         = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),

  2199.     .mime_type         = "application/mxf",

  2200.     .extensions        = "mxf",

  2201.     .priv_data_size    = sizeof(MXFContext),

  2202.     .audio_codec       = AV_CODEC_ID_PCM_S16LE,

  2203.     .video_codec       = AV_CODEC_ID_MPEG2VIDEO,

  2204.     .write_header      = mxf_write_header,

  2205.     .write_packet      = mxf_write_packet,

  2206.     .write_trailer     = mxf_write_footer,

  2207.     .flags             = AVFMT_NOTIMESTAMPS,

  2208.     .interleave_packet = mxf_interleave,

  2209. };

  2210. 

  2211. AVOutputFormat ff_mxf_d10_muxer = {

  2212.     .name              = "mxf_d10",

  2213.     .long_name         = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format) D-10 Mapping"),

  2214.     .mime_type         = "application/mxf",

  2215.     .priv_data_size    = sizeof(MXFContext),

  2216.     .audio_codec       = AV_CODEC_ID_PCM_S16LE,

  2217.     .video_codec       = AV_CODEC_ID_MPEG2VIDEO,

  2218.     .write_header      = mxf_write_header,

  2219.     .write_packet      = mxf_write_packet,

  2220.     .write_trailer     = mxf_write_footer,

  2221.     .flags             = AVFMT_NOTIMESTAMPS,

  2222.     .interleave_packet = mxf_interleave,

  2223.     .priv_class        = &mxf_d10_muxer_class,

  2224. };