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FFmpeg/libavformat/mxfenc.c

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  1. /*

  2.  * MXF muxer

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

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

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

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

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

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

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

  12.  *

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

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

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

  16.  * Lesser General Public License for more details.

  17.  *

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

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

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

  21.  */

  22. 

  23. /*

  24.  * References

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

  26.  * SMPTE 377M MXF File Format Specifications

  27.  * SMPTE 379M MXF Generic Container

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

  29.  * SMPTE RP210: SMPTE Metadata Dictionary

  30.  * SMPTE RP224: Registry of SMPTE Universal Labels

  31.  */

  32. 

  33. #include <inttypes.h>

  34. #include <math.h>

  35. #include <time.h>

  36. 

  37. #include "libavutil/opt.h"

  38. #include "libavutil/random_seed.h"

  39. #include "libavutil/timecode.h"

  40. #include "libavutil/avassert.h"

  41. #include "libavcodec/bytestream.h"

  42. #include "libavcodec/dnxhddata.h"

  43. #include "audiointerleave.h"

  44. #include "avformat.h"

  45. #include "avio_internal.h"

  46. #include "internal.h"

  47. #include "mxf.h"

  48. #include "config.h"

  49. 

  50. extern AVOutputFormat ff_mxf_d10_muxer;

  51. 

  52. #define EDIT_UNITS_PER_BODY 250

  53. #define KAG_SIZE 512

  54. 

  55. typedef struct {

  56.     int local_tag;

  57.     UID uid;

  58. } MXFLocalTagPair;

  59. 

  60. typedef struct {

  61.     uint8_t flags;

  62.     uint64_t offset;

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

  64.     uint16_t temporal_ref;

  65. } MXFIndexEntry;

  66. 

  67. typedef struct {

  68.     AudioInterleaveContext aic;

  69.     UID track_essence_element_key;

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

  71.     const UID *codec_ul;

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

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

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

  75.     int component_depth;

  76.     int temporal_reordering;

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

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

  79.     int video_bit_rate;

  80. } MXFStreamContext;

  81. 

  82. typedef struct {

  83.     UID container_ul;

  84.     UID element_ul;

  85.     UID codec_ul;

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

  87. } MXFContainerEssenceEntry;

  88. 

  89. static const struct {

  90.     enum AVCodecID id;

  91.     int index;

  92. } mxf_essence_mappings[] = {

  93.     { AV_CODEC_ID_MPEG2VIDEO, 0 },

  94.     { AV_CODEC_ID_PCM_S24LE,  1 },

  95.     { AV_CODEC_ID_PCM_S16LE,  1 },

  96.     { AV_CODEC_ID_DVVIDEO,   15 },

  97.     { AV_CODEC_ID_DNXHD,     24 },

  98.     { AV_CODEC_ID_NONE }

  99. };

  100. 

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

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

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

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

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

  106. 

  107. static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {

  108.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },

  109.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  110.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },

  111.       mxf_write_mpegvideo_desc },

  112.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },

  113.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },

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

  115.       mxf_write_aes3_desc },

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

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

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

  119.       mxf_write_wav_desc },

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

  121.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },

  122.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  124.       mxf_write_cdci_desc },

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

  126.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  127.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  128.       mxf_write_generic_sound_desc },

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

  130.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },

  131.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  133.       mxf_write_cdci_desc },

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

  135.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  136.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  137.       mxf_write_generic_sound_desc },

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

  139.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },

  140.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  142.       mxf_write_cdci_desc },

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

  144.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  145.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  146.       mxf_write_generic_sound_desc },

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

  148.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },

  149.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  151.       mxf_write_cdci_desc },

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

  153.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  154.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  155.       mxf_write_generic_sound_desc },

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

  157.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },

  158.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  160.       mxf_write_cdci_desc },

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

  162.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  163.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  164.       mxf_write_generic_sound_desc },

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

  166.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },

  167.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  169.       mxf_write_cdci_desc },

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

  171.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  172.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  173.       mxf_write_generic_sound_desc },

  174.     // DV Unknown

  175.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x7F,0x01 },

  176.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  177.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x00,0x00,0x00 },

  178.       mxf_write_cdci_desc },

  179.     // DV25 525/60

  180.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x40,0x01 },

  181.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  182.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x01,0x00 },

  183.       mxf_write_cdci_desc },

  184.     // DV25 625/50

  185.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 },

  186.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  187.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x02,0x00 },

  188.       mxf_write_cdci_desc },

  189.     // DV50 525/60

  190.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x50,0x01 },

  191.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  192.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x03,0x00 },

  193.       mxf_write_cdci_desc },

  194.     // DV50 625/50

  195.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x51,0x01 },

  196.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  197.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x04,0x00 },

  198.       mxf_write_cdci_desc },

  199.     // DV100 1080/60

  200.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x60,0x01 },

  201.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  202.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x05,0x00 },

  203.       mxf_write_cdci_desc },

  204.     // DV100 1080/50

  205.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x61,0x01 },

  206.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  207.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x06,0x00 },

  208.       mxf_write_cdci_desc },

  209.     // DV100 720/60

  210.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x62,0x01 },

  211.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  212.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x07,0x00 },

  213.       mxf_write_cdci_desc },

  214.     // DV100 720/50

  215.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x63,0x01 },

  216.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  217.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x08,0x00 },

  218.       mxf_write_cdci_desc },

  219.     // DNxHD 1080p 10bit high

  220.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  221.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  222.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x01,0x00,0x00 },

  223.       mxf_write_cdci_desc },

  224.     // DNxHD 1080p 8bit medium

  225.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  226.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  227.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x03,0x00,0x00 },

  228.       mxf_write_cdci_desc },

  229.     // DNxHD 1080p 8bit high

  230.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  231.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  232.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x04,0x00,0x00 },

  233.       mxf_write_cdci_desc },

  234.     // DNxHD 1080i 10bit high

  235.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  236.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  237.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x07,0x00,0x00 },

  238.       mxf_write_cdci_desc },

  239.     // DNxHD 1080i 8bit medium

  240.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  241.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  242.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x08,0x00,0x00 },

  243.       mxf_write_cdci_desc },

  244.     // DNxHD 1080i 8bit high

  245.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  246.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  247.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x09,0x00,0x00 },

  248.       mxf_write_cdci_desc },

  249.     // DNxHD 720p 10bit

  250.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  251.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  252.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x10,0x00,0x00 },

  253.       mxf_write_cdci_desc },

  254.     // DNxHD 720p 8bit high

  255.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  256.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  257.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x11,0x00,0x00 },

  258.       mxf_write_cdci_desc },

  259.     // DNxHD 720p 8bit medium

  260.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  261.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  262.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x12,0x00,0x00 },

  263.       mxf_write_cdci_desc },

  264.     // DNxHD 720p 8bit low

  265.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  266.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  267.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x13,0x00,0x00 },

  268.       mxf_write_cdci_desc },

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

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

  271.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  272.       NULL },

  273. };

  274. 

  275. typedef struct MXFContext {

  276.     AVClass *av_class;

  277.     int64_t footer_partition_offset;

  278.     int essence_container_count;

  279.     AVRational time_base;

  280.     int header_written;

  281.     MXFIndexEntry *index_entries;

  282.     unsigned edit_units_count;

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

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

  285.     int last_indexed_edit_unit;

  286.     uint64_t *body_partition_offset;

  287.     unsigned body_partitions_count;

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

  289.     uint64_t duration;

  290.     AVTimecode tc;       ///< timecode context

  291.     AVStream *timecode_track;

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

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

  294.     uint64_t body_offset;

  295.     uint32_t instance_number;

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

  297. } MXFContext;

  298. 

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

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

  301. 

  302. /**

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

  304.  */

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

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

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

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

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

  310. 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

  311. 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

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

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

  314. 

  315. /**

  316.  * partial key for header metadata

  317.  */

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

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

  320. 

  321. /**

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

  323.  */

  324. static const MXFLocalTagPair mxf_local_tag_batch[] = {

  325.     // preface set

  326.     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */

  327.     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */

  328.     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */

  329.     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */

  330.     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */

  331.     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */

  332.     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */

  333.     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */

  334.     // Identification

  335.     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */

  336.     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */

  337.     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */

  338.     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */

  339.     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */

  340.     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */

  341.     // Content Storage

  342.     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */

  343.     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */

  344.     // Essence Container Data

  345.     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */

  346.     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */

  347.     // Package

  348.     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */

  349.     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */

  350.     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */

  351.     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */

  352.     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */

  353.     // Track

  354.     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */

  355.     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */

  356.     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */

  357.     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */

  358.     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */

  359.     // Sequence

  360.     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */

  361.     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */

  362.     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */

  363.     // Source Clip

  364.     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */

  365.     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */

  366.     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */

  367.     // Timecode Component

  368.     { 0x1501, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x05,0x00,0x00}}, /* Start Time Code */

  369.     { 0x1502, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x04,0x01,0x01,0x02,0x06,0x00,0x00}}, /* Rounded Time Code Base */

  370.     { 0x1503, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x04,0x01,0x01,0x05,0x00,0x00,0x00}}, /* Drop Frame */

  371.     // File Descriptor

  372.     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */

  373.     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */

  374.     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */

  375.     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */

  376.     // Generic Picture Essence Descriptor

  377.     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */

  378.     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */

  379.     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */

  380.     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */

  381.     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */

  382.     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */

  383.     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */

  384.     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */

  385.     { 0x3212, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x01,0x06,0x00,0x00,0x00}}, /* Field Dominance (Opt) */

  386.     // CDCI Picture Essence Descriptor

  387.     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */

  388.     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */

  389.     // Generic Sound Essence Descriptor

  390.     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */

  391.     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */

  392.     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */

  393.     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */

  394.     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */

  395.     // Index Table Segment

  396.     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */

  397.     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */

  398.     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */

  399.     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */

  400.     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */

  401.     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */

  402.     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */

  403.     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */

  404.     // MPEG video Descriptor

  405.     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */

  406.     { 0x8007, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0A,0x00,0x00}}, /* ProfileAndLevel */

  407.     // Wave Audio Essence Descriptor

  408.     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */

  409.     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */

  410. };

  411. 

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

  413. {

  414.     avio_write(pb, uuid_base, 12);

  415.     avio_wb16(pb, type);

  416.     avio_wb16(pb, value);

  417. }

  418. 

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

  420. {

  421.     MXFContext *mxf = s->priv_data;

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

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

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

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

  426. }

  427. 

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

  429. {

  430.     avio_wb32(pb, ref_count);

  431.     avio_wb32(pb, 16);

  432. }

  433. 

  434. static int klv_ber_length(uint64_t len)

  435. {

  436.     if (len < 128)

  437.         return 1;

  438.     else

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

  440. }

  441. 

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

  443. {

  444.     // Determine the best BER size

  445.     int size;

  446.     if (len < 128) {

  447.         //short form

  448.         avio_w8(pb, len);

  449.         return 1;

  450.     }

  451. 

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

  453. 

  454.     // long form

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

  456.     while(size) {

  457.         size--;

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

  459.     }

  460.     return 0;

  461. }

  462. 

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

  464. {

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

  466.     avio_wb24(pb, len);

  467. }

  468. 

  469. /*

  470.  * Get essence container ul index

  471.  */

  472. static int mxf_get_essence_container_ul_index(enum AVCodecID id)

  473. {

  474.     int i;

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

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

  477.             return mxf_essence_mappings[i].index;

  478.     return -1;

  479. }

  480. 

  481. static void mxf_write_primer_pack(AVFormatContext *s)

  482. {

  483.     AVIOContext *pb = s->pb;

  484.     int local_tag_number, i = 0;

  485. 

  486.     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);

  487. 

  488.     avio_write(pb, primer_pack_key, 16);

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

  490. 

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

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

  493. 

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

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

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

  497.     }

  498. }

  499. 

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

  501. {

  502.     avio_wb16(pb, tag);

  503.     avio_wb16(pb, size);

  504. }

  505. 

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

  507. {

  508.     avio_write(pb, header_metadata_key, 13);

  509.     avio_wb24(pb, value);

  510. }

  511. 

  512. static void mxf_free(AVFormatContext *s)

  513. {

  514.     int i;

  515. 

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

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

  518.         av_freep(&st->priv_data);

  519.     }

  520. }

  521. 

  522. static const MXFCodecUL *mxf_get_data_definition_ul(int type)

  523. {

  524.     const MXFCodecUL *uls = ff_mxf_data_definition_uls;

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

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

  527.             break;

  528.         uls++;

  529.     }

  530.     return uls;

  531. }

  532. 

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

  534. #define DESCRIPTOR_COUNT(essence_container_count) \

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

  536. 

  537. static void mxf_write_essence_container_refs(AVFormatContext *s)

  538. {

  539.     MXFContext *c = s->priv_data;

  540.     AVIOContext *pb = s->pb;

  541.     int i;

  542. 

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

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

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

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

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

  548.     }

  549. 

  550.     if (c->essence_container_count > 1)

  551.         avio_write(pb, multiple_desc_ul, 16);

  552. }

  553. 

  554. static void mxf_write_preface(AVFormatContext *s)

  555. {

  556.     MXFContext *mxf = s->priv_data;

  557.     AVIOContext *pb = s->pb;

  558. 

  559.     mxf_write_metadata_key(pb, 0x012f00);

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

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

  562. 

  563.     // write preface set uid

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

  565.     mxf_write_uuid(pb, Preface, 0);

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

  567. 

  568.     // last modified date

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

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

  571. 

  572.     // write version

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

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

  575. 

  576.     // write identification_refs

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

  578.     mxf_write_refs_count(pb, 1);

  579.     mxf_write_uuid(pb, Identification, 0);

  580. 

  581.     // write content_storage_refs

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

  583.     mxf_write_uuid(pb, ContentStorage, 0);

  584. 

  585.     // operational pattern

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

  587.     avio_write(pb, op1a_ul, 16);

  588. 

  589.     // write essence_container_refs

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

  591.     mxf_write_essence_container_refs(s);

  592. 

  593.     // write dm_scheme_refs

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

  595.     avio_wb64(pb, 0);

  596. }

  597. 

  598. /*

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

  600.  */

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

  602. {

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

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

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

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

  607. }

  608. 

  609. static void mxf_write_identification(AVFormatContext *s)

  610. {

  611.     MXFContext *mxf = s->priv_data;

  612.     AVIOContext *pb = s->pb;

  613.     const char *company = "FFmpeg";

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

  615.     const char *version;

  616.     int length;

  617. 

  618.     mxf_write_metadata_key(pb, 0x013000);

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

  620. 

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

  622.         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);

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

  624.     klv_encode_ber_length(pb, length);

  625. 

  626.     // write uid

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

  628.     mxf_write_uuid(pb, Identification, 0);

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

  630. 

  631.     // write generation uid

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

  633.     mxf_write_uuid(pb, Identification, 1);

  634. 

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

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

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

  638. 

  639.     // write product uid

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

  641.     mxf_write_uuid(pb, Identification, 2);

  642. 

  643.     // modification date

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

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

  646. }

  647. 

  648. static void mxf_write_content_storage(AVFormatContext *s)

  649. {

  650.     AVIOContext *pb = s->pb;

  651. 

  652.     mxf_write_metadata_key(pb, 0x011800);

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

  654.     klv_encode_ber_length(pb, 92);

  655. 

  656.     // write uid

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

  658.     mxf_write_uuid(pb, ContentStorage, 0);

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

  660. 

  661.     // write package reference

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

  663.     mxf_write_refs_count(pb, 2);

  664.     mxf_write_uuid(pb, MaterialPackage, 0);

  665.     mxf_write_uuid(pb, SourcePackage, 0);

  666. 

  667.     // write essence container data

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

  669.     mxf_write_refs_count(pb, 1);

  670.     mxf_write_uuid(pb, EssenceContainerData, 0);

  671. }

  672. 

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

  674. {

  675.     MXFContext *mxf = s->priv_data;

  676.     AVIOContext *pb = s->pb;

  677.     MXFStreamContext *sc = st->priv_data;

  678. 

  679.     mxf_write_metadata_key(pb, 0x013b00);

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

  681.     klv_encode_ber_length(pb, 80);

  682. 

  683.     // write track uid

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

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

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

  687. 

  688.     // write track id

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

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

  691. 

  692.     // write track number

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

  694.     if (type == MaterialPackage)

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

  696.     else

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

  698. 

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

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

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

  702. 

  703.     // write origin

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

  705.     avio_wb64(pb, 0);

  706. 

  707.     // write sequence refs

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

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

  710. }

  711. 

  712. 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 };

  713. 

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

  715. {

  716.     MXFContext *mxf = s->priv_data;

  717.     AVIOContext *pb = s->pb;

  718. 

  719.     // find data define uls

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

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

  722.         avio_write(pb, smpte_12m_timecode_track_data_ul, 16);

  723.     else {

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

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

  726.     }

  727. 

  728.     // write duration

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

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

  731. }

  732. 

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

  734. {

  735.     MXFContext *mxf = s->priv_data;

  736.     AVIOContext *pb = s->pb;

  737.     enum MXFMetadataSetType component;

  738. 

  739.     mxf_write_metadata_key(pb, 0x010f00);

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

  741.     klv_encode_ber_length(pb, 80);

  742. 

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

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

  745. 

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

  747.     mxf_write_common_fields(s, st);

  748. 

  749.     // write structural component

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

  751.     mxf_write_refs_count(pb, 1);

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

  753.         component = TimecodeComponent;

  754.     else

  755.         component = SourceClip;

  756.     if (type == SourcePackage)

  757.         component += TypeBottom;

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

  759. }

  760. 

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

  762. {

  763.     MXFContext *mxf = s->priv_data;

  764.     AVIOContext *pb = s->pb;

  765. 

  766.     mxf_write_metadata_key(pb, 0x011400);

  767.     klv_encode_ber_length(pb, 75);

  768. 

  769.     // UID

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

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

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

  773. 

  774.     mxf_write_common_fields(s, st);

  775. 

  776.     // Start Time Code

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

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

  779. 

  780.     // Rounded Time Code Base

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

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

  783. 

  784.     // Drop Frame

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

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

  787. }

  788. 

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

  790. {

  791.     AVIOContext *pb = s->pb;

  792.     int i;

  793. 

  794.     mxf_write_metadata_key(pb, 0x011100);

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

  796.     klv_encode_ber_length(pb, 108);

  797. 

  798.     // write uid

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

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

  801. 

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

  803.     mxf_write_common_fields(s, st);

  804. 

  805.     // write start_position

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

  807.     avio_wb64(pb, 0);

  808. 

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

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

  811.     if (type == SourcePackage) {

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

  813.             avio_wb64(pb, 0);

  814.     } else

  815.         mxf_write_umid(s, 1);

  816. 

  817.     // write source track id

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

  819.     if (type == SourcePackage)

  820.         avio_wb32(pb, 0);

  821.     else

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

  823. }

  824. 

  825. static void mxf_write_multi_descriptor(AVFormatContext *s)

  826. {

  827.     MXFContext *mxf = s->priv_data;

  828.     AVIOContext *pb = s->pb;

  829.     const uint8_t *ul;

  830.     int i;

  831. 

  832.     mxf_write_metadata_key(pb, 0x014400);

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

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

  835. 

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

  837.     mxf_write_uuid(pb, MultipleDescriptor, 0);

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

  839. 

  840.     // write sample rate

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

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

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

  844. 

  845.     // write essence container ul

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

  847.     if (mxf->essence_container_count > 1)

  848.         ul = multiple_desc_ul;

  849.     else {

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

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

  852.     }

  853.     avio_write(pb, ul, 16);

  854. 

  855.     // write sub descriptor refs

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

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

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

  859.         mxf_write_uuid(pb, SubDescriptor, i);

  860. }

  861. 

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

  863. {

  864.     MXFContext *mxf = s->priv_data;

  865.     MXFStreamContext *sc = st->priv_data;

  866.     AVIOContext *pb = s->pb;

  867. 

  868.     avio_write(pb, key, 16);

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

  870. 

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

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

  873. 

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

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

  876. 

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

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

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

  880. 

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

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

  883. }

  884. 

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

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

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

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

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

  890. 

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

  892. {

  893.     MXFStreamContext *sc = st->priv_data;

  894.     AVIOContext *pb = s->pb;

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

  896.     int display_height;

  897.     int f1, f2;

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

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

  900.         desc_size += 5;

  901. 

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

  903. 

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

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

  906. 

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

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

  909. 

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

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

  912. 

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

  914.         display_height = 576;

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

  916.         display_height = 486;

  917.     else

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

  919. 

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

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

  922. 

  923.     // component depth

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

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

  926. 

  927.     // horizontal subsampling

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

  929.     avio_wb32(pb, 2);

  930. 

  931.     // frame layout

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

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

  934. 

  935.     // video line map

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

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

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

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

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

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

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

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

  944.     }

  945. 

  946.     if (!sc->interlaced) {

  947.         f2  = 0;

  948.         f1 *= 2;

  949.     }

  950. 

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

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

  953.     avio_wb32(pb, 4);

  954.     avio_wb32(pb, f1);

  955.     if (sc->interlaced)

  956.         avio_wb32(pb, f2);

  957. 

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

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

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

  961. 

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

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

  964. 

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

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

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

  968.     }

  969. 

  970. }

  971. 

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

  973. {

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

  975. }

  976. 

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

  978. {

  979.     AVIOContext *pb = s->pb;

  980.     MXFStreamContext *sc = st->priv_data;

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

  982. 

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

  984. 

  985.     // bit rate

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

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

  988. 

  989.     // profile and level

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

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

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

  993.     avio_w8(pb, profile_and_level);

  994. }

  995. 

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

  997. {

  998.     AVIOContext *pb = s->pb;

  999. 

  1000.     mxf_write_generic_desc(s, st, key, size+5+12+8+8);

  1001. 

  1002.     // audio locked

  1003.     mxf_write_local_tag(pb, 1, 0x3D02);

  1004.     avio_w8(pb, 1);

  1005. 

  1006.     // write audio sampling rate

  1007.     mxf_write_local_tag(pb, 8, 0x3D03);

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

  1009.     avio_wb32(pb, 1);

  1010. 

  1011.     mxf_write_local_tag(pb, 4, 0x3D07);

  1012.     avio_wb32(pb, st->codec->channels);

  1013. 

  1014.     mxf_write_local_tag(pb, 4, 0x3D01);

  1015.     avio_wb32(pb, av_get_bits_per_sample(st->codec->codec_id));

  1016. }

  1017. 

  1018. static void mxf_write_wav_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)

  1019. {

  1020.     AVIOContext *pb = s->pb;

  1021. 

  1022.     mxf_write_generic_sound_common(s, st, key, size+6+8);

  1023. 

  1024.     mxf_write_local_tag(pb, 2, 0x3D0A);

  1025.     avio_wb16(pb, st->codec->block_align);

  1026. 

  1027.     // avg bytes per sec

  1028.     mxf_write_local_tag(pb, 4, 0x3D09);

  1029.     avio_wb32(pb, st->codec->block_align*st->codec->sample_rate);

  1030. }

  1031. 

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

  1033. {

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

  1035. }

  1036. 

  1037. static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)

  1038. {

  1039.     mxf_write_wav_common(s, st, mxf_aes3_descriptor_key, 0);

  1040. }

  1041. 

  1042. static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st)

  1043. {

  1044.     mxf_write_generic_sound_common(s, st, mxf_generic_sound_descriptor_key, 0);

  1045. }

  1046. 

  1047. static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)

  1048. {

  1049.     MXFContext *mxf = s->priv_data;

  1050.     AVIOContext *pb = s->pb;

  1051.     int i, track_count = s->nb_streams+1;

  1052. 

  1053.     if (type == MaterialPackage) {

  1054.         mxf_write_metadata_key(pb, 0x013600);

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

  1056.         klv_encode_ber_length(pb, 92 + 16*track_count);

  1057.     } else {

  1058.         mxf_write_metadata_key(pb, 0x013700);

  1059.         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);

  1060.         klv_encode_ber_length(pb, 112 + 16*track_count); // 20 bytes length for descriptor reference

  1061.     }

  1062. 

  1063.     // write uid

  1064.     mxf_write_local_tag(pb, 16, 0x3C0A);

  1065.     mxf_write_uuid(pb, type, 0);

  1066.     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);

  1067.     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);

  1068. 

  1069.     // write package umid

  1070.     mxf_write_local_tag(pb, 32, 0x4401);

  1071.     mxf_write_umid(s, type == SourcePackage);

  1072.     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);

  1073. 

  1074.     // package creation date

  1075.     mxf_write_local_tag(pb, 8, 0x4405);

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

  1077. 

  1078.     // package modified date

  1079.     mxf_write_local_tag(pb, 8, 0x4404);

  1080.     avio_wb64(pb, mxf->timestamp);

  1081. 

  1082.     // write track refs

  1083.     mxf_write_local_tag(pb, track_count*16 + 8, 0x4403);

  1084.     mxf_write_refs_count(pb, track_count);

  1085.     mxf_write_uuid(pb, type == MaterialPackage ? Track :

  1086.                    Track + TypeBottom, -1); // timecode track

  1087.     for (i = 0; i < s->nb_streams; i++)

  1088.         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);

  1089. 

  1090.     // write multiple descriptor reference

  1091.     if (type == SourcePackage) {

  1092.         mxf_write_local_tag(pb, 16, 0x4701);

  1093.         if (s->nb_streams > 1) {

  1094.             mxf_write_uuid(pb, MultipleDescriptor, 0);

  1095.             mxf_write_multi_descriptor(s);

  1096.         } else

  1097.             mxf_write_uuid(pb, SubDescriptor, 0);

  1098.     }

  1099. 

  1100.     // write timecode track

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

  1102.     mxf_write_sequence(s, mxf->timecode_track, type);

  1103.     mxf_write_timecode_component(s, mxf->timecode_track, type);

  1104. 

  1105.     for (i = 0; i < s->nb_streams; i++) {

  1106.         AVStream *st = s->streams[i];

  1107.         mxf_write_track(s, st, type);

  1108.         mxf_write_sequence(s, st, type);

  1109.         mxf_write_structural_component(s, st, type);

  1110. 

  1111.         if (type == SourcePackage) {

  1112.             MXFStreamContext *sc = st->priv_data;

  1113.             mxf_essence_container_uls[sc->index].write_desc(s, st);

  1114.         }

  1115.     }

  1116. }

  1117. 

  1118. static int mxf_write_essence_container_data(AVFormatContext *s)

  1119. {

  1120.     AVIOContext *pb = s->pb;

  1121. 

  1122.     mxf_write_metadata_key(pb, 0x012300);

  1123.     klv_encode_ber_length(pb, 72);

  1124. 

  1125.     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID

  1126.     mxf_write_uuid(pb, EssenceContainerData, 0);

  1127. 

  1128.     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID

  1129.     mxf_write_umid(s, 1);

  1130. 

  1131.     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID

  1132.     avio_wb32(pb, 1);

  1133. 

  1134.     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID

  1135.     avio_wb32(pb, 2);

  1136. 

  1137.     return 0;

  1138. }

  1139. 

  1140. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  1141. {

  1142.     mxf_write_preface(s);

  1143.     mxf_write_identification(s);

  1144.     mxf_write_content_storage(s);

  1145.     mxf_write_package(s, MaterialPackage);

  1146.     mxf_write_package(s, SourcePackage);

  1147.     mxf_write_essence_container_data(s);

  1148.     return 0;

  1149. }

  1150. 

  1151. static unsigned klv_fill_size(uint64_t size)

  1152. {

  1153.     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));

  1154.     if (pad < 20) // smallest fill item possible

  1155.         return pad + KAG_SIZE;

  1156.     else

  1157.         return pad & (KAG_SIZE-1);

  1158. }

  1159. 

  1160. static void mxf_write_index_table_segment(AVFormatContext *s)

  1161. {

  1162.     MXFContext *mxf = s->priv_data;

  1163.     AVIOContext *pb = s->pb;

  1164.     int i, j, temporal_reordering = 0;

  1165.     int key_index = mxf->last_key_index;

  1166. 

  1167.     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);

  1168. 

  1169.     if (!mxf->edit_units_count && !mxf->edit_unit_byte_count)

  1170.         return;

  1171. 

  1172.     avio_write(pb, index_table_segment_key, 16);

  1173. 

  1174.     if (mxf->edit_unit_byte_count) {

  1175.         klv_encode_ber_length(pb, 80);

  1176.     } else {

  1177.         klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1LL)*6 +

  1178.                               12+mxf->edit_units_count*(11+mxf->slice_count*4LL));

  1179.     }

  1180. 

  1181.     // instance id

  1182.     mxf_write_local_tag(pb, 16, 0x3C0A);

  1183.     mxf_write_uuid(pb, IndexTableSegment, 0);

  1184. 

  1185.     // index edit rate

  1186.     mxf_write_local_tag(pb, 8, 0x3F0B);

  1187.     avio_wb32(pb, mxf->time_base.den);

  1188.     avio_wb32(pb, mxf->time_base.num);

  1189. 

  1190.     // index start position

  1191.     mxf_write_local_tag(pb, 8, 0x3F0C);

  1192.     avio_wb64(pb, mxf->last_indexed_edit_unit);

  1193. 

  1194.     // index duration

  1195.     mxf_write_local_tag(pb, 8, 0x3F0D);

  1196.     if (mxf->edit_unit_byte_count)

  1197.         avio_wb64(pb, 0); // index table covers whole container

  1198.     else

  1199.         avio_wb64(pb, mxf->edit_units_count);

  1200. 

  1201.     // edit unit byte count

  1202.     mxf_write_local_tag(pb, 4, 0x3F05);

  1203.     avio_wb32(pb, mxf->edit_unit_byte_count);

  1204. 

  1205.     // index sid

  1206.     mxf_write_local_tag(pb, 4, 0x3F06);

  1207.     avio_wb32(pb, 2);

  1208. 

  1209.     // body sid

  1210.     mxf_write_local_tag(pb, 4, 0x3F07);

  1211.     avio_wb32(pb, 1);

  1212. 

  1213.     if (!mxf->edit_unit_byte_count) {

  1214.         // real slice count - 1

  1215.         mxf_write_local_tag(pb, 1, 0x3F08);

  1216.         avio_w8(pb, mxf->slice_count);

  1217. 

  1218.         // delta entry array

  1219.         mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);

  1220.         avio_wb32(pb, s->nb_streams+1); // num of entries

  1221.         avio_wb32(pb, 6);               // size of one entry

  1222.         // write system item delta entry

  1223.         avio_w8(pb, 0);

  1224.         avio_w8(pb, 0); // slice entry

  1225.         avio_wb32(pb, 0); // element delta

  1226.         for (i = 0; i < s->nb_streams; i++) {

  1227.             AVStream *st = s->streams[i];

  1228.             MXFStreamContext *sc = st->priv_data;

  1229.             avio_w8(pb, sc->temporal_reordering);

  1230.             if (sc->temporal_reordering)

  1231.                 temporal_reordering = 1;

  1232.             if (i == 0) { // video track

  1233.                 avio_w8(pb, 0); // slice number

  1234.                 avio_wb32(pb, KAG_SIZE); // system item size including klv fill

  1235.             } else { // audio track

  1236.                 unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;

  1237.                 audio_frame_size += klv_fill_size(audio_frame_size);

  1238.                 avio_w8(pb, 1);

  1239.                 avio_wb32(pb, (i-1)*audio_frame_size); // element delta

  1240.             }

  1241.         }

  1242. 

  1243.         mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);

  1244.         avio_wb32(pb, mxf->edit_units_count);  // num of entries

  1245.         avio_wb32(pb, 11+mxf->slice_count*4);  // size of one entry

  1246. 

  1247.         for (i = 0; i < mxf->edit_units_count; i++) {

  1248.             int temporal_offset = 0;

  1249. 

  1250.             if (!(mxf->index_entries[i].flags & 0x33)) { // I frame

  1251.                 mxf->last_key_index = key_index;

  1252.                 key_index = i;

  1253.             }

  1254. 

  1255.             if (temporal_reordering) {

  1256.                 int pic_num_in_gop = i - key_index;

  1257.                 if (pic_num_in_gop != mxf->index_entries[i].temporal_ref) {

  1258.                     for (j = key_index; j < mxf->edit_units_count; j++) {

  1259.                         if (pic_num_in_gop == mxf->index_entries[j].temporal_ref)

  1260.                             break;

  1261.                     }

  1262.                     if (j == mxf->edit_units_count)

  1263.                         av_log(s, AV_LOG_WARNING, "missing frames\n");

  1264.                     temporal_offset = j - key_index - pic_num_in_gop;

  1265.                 }

  1266.             }

  1267.             avio_w8(pb, temporal_offset);

  1268. 

  1269.             if ((mxf->index_entries[i].flags & 0x30) == 0x30) { // back and forward prediction

  1270.                 avio_w8(pb, mxf->last_key_index - i);

  1271.             } else {

  1272.                 avio_w8(pb, key_index - i); // key frame offset

  1273.                 if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward

  1274.                     mxf->last_key_index = key_index;

  1275.             }

  1276. 

  1277.             if (!(mxf->index_entries[i].flags & 0x33) && // I frame

  1278.                 mxf->index_entries[i].flags & 0x40 && !temporal_offset)

  1279.                 mxf->index_entries[i].flags |= 0x80; // random access

  1280.             avio_w8(pb, mxf->index_entries[i].flags);

  1281.             // stream offset

  1282.             avio_wb64(pb, mxf->index_entries[i].offset);

  1283.             if (s->nb_streams > 1)

  1284.                 avio_wb32(pb, mxf->index_entries[i].slice_offset);

  1285.         }

  1286. 

  1287.         mxf->last_key_index = key_index - mxf->edit_units_count;

  1288.         mxf->last_indexed_edit_unit += mxf->edit_units_count;

  1289.         mxf->edit_units_count = 0;

  1290.     }

  1291. }

  1292. 

  1293. static void mxf_write_klv_fill(AVFormatContext *s)

  1294. {

  1295.     unsigned pad = klv_fill_size(avio_tell(s->pb));

  1296.     if (pad) {

  1297.         avio_write(s->pb, klv_fill_key, 16);

  1298.         pad -= 16 + 4;

  1299.         klv_encode_ber4_length(s->pb, pad);

  1300.         ffio_fill(s->pb, 0, pad);

  1301.         av_assert1(!(avio_tell(s->pb) & (KAG_SIZE-1)));

  1302.     }

  1303. }

  1304. 

  1305. static int mxf_write_partition(AVFormatContext *s, int bodysid,

  1306.                                 int indexsid,

  1307.                                 const uint8_t *key, int write_metadata)

  1308. {

  1309.     MXFContext *mxf = s->priv_data;

  1310.     AVIOContext *pb = s->pb;

  1311.     int64_t header_byte_count_offset;

  1312.     unsigned index_byte_count = 0;

  1313.     uint64_t partition_offset = avio_tell(pb);

  1314.     int err;

  1315. 

  1316.     if (!mxf->edit_unit_byte_count && mxf->edit_units_count)

  1317.         index_byte_count = 85 + 12+(s->nb_streams+1)*6 +

  1318.             12+mxf->edit_units_count*(11+mxf->slice_count*4);

  1319.     else if (mxf->edit_unit_byte_count && indexsid)

  1320.         index_byte_count = 80;

  1321. 

  1322.     if (index_byte_count) {

  1323.         // add encoded ber length

  1324.         index_byte_count += 16 + klv_ber_length(index_byte_count);

  1325.         index_byte_count += klv_fill_size(index_byte_count);

  1326.     }

  1327. 

  1328.     if (!memcmp(key, body_partition_key, 16)) {

  1329.         if ((err = av_reallocp_array(&mxf->body_partition_offset, mxf->body_partitions_count + 1,

  1330.                                      sizeof(*mxf->body_partition_offset))) < 0) {

  1331.             mxf->body_partitions_count = 0;

  1332.             return err;

  1333.         }

  1334.         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;

  1335.     }

  1336. 

  1337.     // write klv

  1338.     avio_write(pb, key, 16);

  1339.     klv_encode_ber_length(pb, 88 + 16LL * DESCRIPTOR_COUNT(mxf->essence_container_count));

  1340. 

  1341.     // write partition value

  1342.     avio_wb16(pb, 1); // majorVersion

  1343.     avio_wb16(pb, 2); // minorVersion

  1344.     avio_wb32(pb, KAG_SIZE); // KAGSize

  1345. 

  1346.     avio_wb64(pb, partition_offset); // ThisPartition

  1347. 

  1348.     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)

  1349.         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition

  1350.     else if (!memcmp(key, footer_partition_key, 16) && mxf->body_partitions_count)

  1351.         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition

  1352.     else

  1353.         avio_wb64(pb, 0);

  1354. 

  1355.     avio_wb64(pb, mxf->footer_partition_offset); // footerPartition

  1356. 

  1357.     // set offset

  1358.     header_byte_count_offset = avio_tell(pb);

  1359.     avio_wb64(pb, 0); // headerByteCount, update later

  1360. 

  1361.     // indexTable

  1362.     avio_wb64(pb, index_byte_count); // indexByteCount

  1363.     avio_wb32(pb, index_byte_count ? indexsid : 0); // indexSID

  1364. 

  1365.     // BodyOffset

  1366.     if (bodysid && mxf->edit_units_count && mxf->body_partitions_count) {

  1367.         avio_wb64(pb, mxf->body_offset);

  1368.     } else

  1369.         avio_wb64(pb, 0);

  1370. 

  1371.     avio_wb32(pb, bodysid); // bodySID

  1372. 

  1373.     // operational pattern

  1374.     avio_write(pb, op1a_ul, 16);

  1375. 

  1376.     // essence container

  1377.     mxf_write_essence_container_refs(s);

  1378. 

  1379.     if (write_metadata) {

  1380.         // mark the start of the headermetadata and calculate metadata size

  1381.         int64_t pos, start;

  1382.         unsigned header_byte_count;

  1383. 

  1384.         mxf_write_klv_fill(s);

  1385.         start = avio_tell(s->pb);

  1386.         mxf_write_primer_pack(s);

  1387.         mxf_write_header_metadata_sets(s);

  1388.         pos = avio_tell(s->pb);

  1389.         header_byte_count = pos - start + klv_fill_size(pos);

  1390. 

  1391.         // update header_byte_count

  1392.         avio_seek(pb, header_byte_count_offset, SEEK_SET);

  1393.         avio_wb64(pb, header_byte_count);

  1394.         avio_seek(pb, pos, SEEK_SET);

  1395.     }

  1396. 

  1397.     avio_flush(pb);

  1398. 

  1399.     return 0;

  1400. }

  1401. 

  1402. static int mxf_parse_dnxhd_frame(AVFormatContext *s, AVStream *st,

  1403. AVPacket *pkt)

  1404. {

  1405.     MXFContext *mxf = s->priv_data;

  1406.     MXFStreamContext *sc = st->priv_data;

  1407.     int i, cid;

  1408.     uint8_t* header_cid;

  1409.     int frame_size = 0;

  1410. 

  1411.     if (mxf->header_written)

  1412.         return 1;

  1413. 

  1414.     if (pkt->size < 43)

  1415.         return -1;

  1416. 

  1417.     header_cid = pkt->data + 0x28;

  1418.     cid = header_cid[0] << 24 | header_cid[1] << 16 | header_cid[2] << 8 | header_cid[3];

  1419. 

  1420.     if ((frame_size = avpriv_dnxhd_get_frame_size(cid)) < 0)

  1421.         return -1;

  1422. 

  1423.     switch (cid) {

  1424.     case 1235:

  1425.         sc->index = 24;

  1426.         sc->component_depth = 10;

  1427.         break;

  1428.     case 1237:

  1429.         sc->index = 25;

  1430.         break;

  1431.     case 1238:

  1432.         sc->index = 26;

  1433.         break;

  1434.     case 1241:

  1435.         sc->index = 27;

  1436.         sc->component_depth = 10;

  1437.         break;

  1438.     case 1242:

  1439.         sc->index = 28;

  1440.         break;

  1441.     case 1243:

  1442.         sc->index = 29;

  1443.         break;

  1444.     case 1250:

  1445.         sc->index = 30;

  1446.         sc->component_depth = 10;

  1447.         break;

  1448.     case 1251:

  1449.         sc->index = 31;

  1450.         break;

  1451.     case 1252:

  1452.         sc->index = 32;

  1453.         break;

  1454.     case 1253:

  1455.         sc->index = 33;

  1456.         break;

  1457.     default:

  1458.         return -1;

  1459.     }

  1460. 

  1461.     sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;

  1462.     sc->aspect_ratio = (AVRational){ 16, 9 };

  1463. 

  1464.     mxf->edit_unit_byte_count = KAG_SIZE;

  1465.     for (i = 0; i < s->nb_streams; i++) {

  1466.         AVStream *st = s->streams[i];

  1467.         MXFStreamContext *sc = st->priv_data;

  1468.         if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

  1469.             mxf->edit_unit_byte_count += 16 + 4 + sc->aic.samples[0]*sc->aic.sample_size;

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

  1471.         } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  1472.             mxf->edit_unit_byte_count += 16 + 4 + frame_size;

  1473.             mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1474.         }

  1475.     }

  1476. 

  1477.     return 1;

  1478. }

  1479. 

  1480. static int mxf_parse_dv_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1481. {

  1482.     MXFContext *mxf = s->priv_data;

  1483.     MXFStreamContext *sc = st->priv_data;

  1484.     uint8_t *vs_pack, *vsc_pack;

  1485.     int i, ul_index, frame_size, stype, pal;

  1486. 

  1487.     if (mxf->header_written)

  1488.         return 1;

  1489. 

  1490.     // Check for minimal frame size

  1491.     if (pkt->size < 120000)

  1492.         return -1;

  1493. 

  1494.     vs_pack  = pkt->data + 80*5 + 48;

  1495.     vsc_pack = pkt->data + 80*5 + 53;

  1496.     stype    = vs_pack[3] & 0x1f;

  1497.     pal      = (vs_pack[3] >> 5) & 0x1;

  1498. 

  1499.     if ((vs_pack[2] & 0x07) == 0x02)

  1500.         sc->aspect_ratio = (AVRational){ 16, 9 };

  1501.     else

  1502.         sc->aspect_ratio = (AVRational){ 4, 3 };

  1503. 

  1504.     sc->interlaced = (vsc_pack[3] >> 4) & 0x01;

  1505.     // TODO: fix dv encoder to set proper FF/FS value in VSC pack

  1506.     // and set field dominance accordingly

  1507.     // av_log(s, AV_LOG_DEBUG, "DV vsc pack ff/ss = %x\n", vsc_pack[2] >> 6);

  1508. 

  1509.     switch (stype) {

  1510.     case 0x18: // DV100 720p

  1511.         ul_index = 6 + pal;

  1512.         frame_size = pal ? 288000 : 240000;

  1513.         if (sc->interlaced) {

  1514.             av_log(s, AV_LOG_ERROR, "source marked as interlaced but codec profile is progressive\n");

  1515.             sc->interlaced = 0;

  1516.         }

  1517.         break;

  1518.     case 0x14: // DV100 1080i

  1519.         ul_index = 4 + pal;

  1520.         frame_size = pal ? 576000 : 480000;

  1521.         break;

  1522.     case 0x04: // DV50

  1523.         ul_index = 2 + pal;

  1524.         frame_size = pal ? 288000 : 240000;

  1525.         break;

  1526.     default: // DV25

  1527.         ul_index = 0 + pal;

  1528.         frame_size = pal ? 144000 : 120000;

  1529.     }

  1530. 

  1531.     sc->index = ul_index + 16;

  1532.     sc->codec_ul =  &mxf_essence_container_uls[sc->index].codec_ul;

  1533. 

  1534.     mxf->edit_unit_byte_count = KAG_SIZE;

  1535.     for (i = 0; i < s->nb_streams; i++) {

  1536.         AVStream *st = s->streams[i];

  1537.         MXFStreamContext *sc = st->priv_data;

  1538.         if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

  1539.             mxf->edit_unit_byte_count += 16 + 4 + sc->aic.samples[0]*sc->aic.sample_size;

  1540.             mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1541.         } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  1542.             mxf->edit_unit_byte_count += 16 + 4 + frame_size;

  1543.             mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1544.         }

  1545.     }

  1546. 

  1547.     return 1;

  1548. }

  1549. 

  1550. static const UID mxf_mpeg2_codec_uls[] = {

  1551.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame

  1552.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP

  1553.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame

  1554.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP

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

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

  1557.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame

  1558.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP

  1559.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x05,0x02,0x00 }, // MP@H-14 I-Frame

  1560.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x05,0x03,0x00 }, // MP@H-14 Long GOP

  1561. };

  1562. 

  1563. static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)

  1564. {

  1565.     int long_gop = avctx->gop_size > 1 || avctx->has_b_frames;

  1566. 

  1567.     if (avctx->profile == 4) { // Main

  1568.         if (avctx->level == 8) // Main

  1569.             return &mxf_mpeg2_codec_uls[0+long_gop];

  1570.         else if (avctx->level == 4) // High

  1571.             return &mxf_mpeg2_codec_uls[4+long_gop];

  1572.         else if (avctx->level == 6) // High 14

  1573.             return &mxf_mpeg2_codec_uls[8+long_gop];

  1574.     } else if (avctx->profile == 0) { // 422

  1575.         if (avctx->level == 5) // Main

  1576.             return &mxf_mpeg2_codec_uls[2+long_gop];

  1577.         else if (avctx->level == 2) // High

  1578.             return &mxf_mpeg2_codec_uls[6+long_gop];

  1579.     }

  1580.     return NULL;

  1581. }

  1582. 

  1583. static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st,

  1584.                                  AVPacket *pkt, MXFIndexEntry *e)

  1585. {

  1586.     MXFStreamContext *sc = st->priv_data;

  1587.     uint32_t c = -1;

  1588.     int i;

  1589. 

  1590.     for(i = 0; i < pkt->size - 4; i++) {

  1591.         c = (c<<8) + pkt->data[i];

  1592.         if (c == 0x1b5) {

  1593.             if ((pkt->data[i+1] & 0xf0) == 0x10) { // seq ext

  1594.                 st->codec->profile = pkt->data[i+1] & 0x07;

  1595.                 st->codec->level   = pkt->data[i+2] >> 4;

  1596.             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext

  1597.                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame

  1598.                 if (sc->interlaced)

  1599.                     sc->field_dominance = 1 + !(pkt->data[i+4] & 0x80); // top field first

  1600.                 break;

  1601.             }

  1602.         } else if (c == 0x1b8) { // gop

  1603.             if (pkt->data[i+4]>>6 & 0x01) { // closed

  1604.                 sc->closed_gop = 1;

  1605.                 if (e->flags & 0x40) // sequence header present

  1606.                     e->flags |= 0x80; // random access

  1607.             }

  1608.         } else if (c == 0x1b3) { // seq

  1609.             e->flags |= 0x40;

  1610.             switch ((pkt->data[i+4]>>4) & 0xf) {

  1611.             case 2:  sc->aspect_ratio = (AVRational){  4,  3}; break;

  1612.             case 3:  sc->aspect_ratio = (AVRational){ 16,  9}; break;

  1613.             case 4:  sc->aspect_ratio = (AVRational){221,100}; break;

  1614.             default:

  1615.                 av_reduce(&sc->aspect_ratio.num, &sc->aspect_ratio.den,

  1616.                           st->codec->width, st->codec->height, 1024*1024);

  1617.             }

  1618.         } else if (c == 0x100) { // pic

  1619.             int pict_type = (pkt->data[i+2]>>3) & 0x07;

  1620.             e->temporal_ref = (pkt->data[i+1]<<2) | (pkt->data[i+2]>>6);

  1621.             if (pict_type == 2) { // P frame

  1622.                 e->flags |= 0x22;

  1623.                 sc->closed_gop = 0; // reset closed gop, don't matter anymore

  1624.             } else if (pict_type == 3) { // B frame

  1625.                 if (sc->closed_gop)

  1626.                     e->flags |= 0x13; // only backward prediction

  1627.                 else

  1628.                     e->flags |= 0x33;

  1629.                 sc->temporal_reordering = -1;

  1630.             } else if (!pict_type) {

  1631.                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");

  1632.                 return 0;

  1633.             }

  1634.         }

  1635.     }

  1636.     if (s->oformat != &ff_mxf_d10_muxer)

  1637.         sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);

  1638.     return !!sc->codec_ul;

  1639. }

  1640. 

  1641. static uint64_t mxf_parse_timestamp(time_t timestamp)

  1642. {

  1643.     struct tm *time = gmtime(&timestamp);

  1644.     if (!time)

  1645.         return 0;

  1646.     return (uint64_t)(time->tm_year+1900) << 48 |

  1647.            (uint64_t)(time->tm_mon+1)     << 40 |

  1648.            (uint64_t) time->tm_mday       << 32 |

  1649.                       time->tm_hour       << 24 |

  1650.                       time->tm_min        << 16 |

  1651.                       time->tm_sec        << 8;

  1652. }

  1653. 

  1654. static void mxf_gen_umid(AVFormatContext *s)

  1655. {

  1656.     MXFContext *mxf = s->priv_data;

  1657.     uint32_t seed = av_get_random_seed();

  1658.     uint64_t umid = seed + 0x5294713400000000LL;

  1659. 

  1660.     AV_WB64(mxf->umid  , umid);

  1661.     AV_WB64(mxf->umid+8, umid>>8);

  1662. 

  1663.     mxf->instance_number = seed & 0xFFFFFF;

  1664. }

  1665. 

  1666. static int mxf_write_header(AVFormatContext *s)

  1667. {

  1668.     MXFContext *mxf = s->priv_data;

  1669.     int i, ret;

  1670.     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};

  1671.     const MXFSamplesPerFrame *spf = NULL;

  1672.     AVDictionaryEntry *t;

  1673.     int64_t timestamp = 0;

  1674.     AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0);

  1675. 

  1676.     if (!s->nb_streams)

  1677.         return -1;

  1678. 

  1679.     for (i = 0; i < s->nb_streams; i++) {

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

  1681.         MXFStreamContext *sc = av_mallocz(sizeof(*sc));

  1682.         if (!sc)

  1683.             return AVERROR(ENOMEM);

  1684.         st->priv_data = sc;

  1685. 

  1686.         if ((i == 0) ^ (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)) {

  1687.             av_log(s, AV_LOG_ERROR, "there must be exactly one video stream and it must be the first one\n");

  1688.             return -1;

  1689.         }

  1690. 

  1691.         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  1692.             AVRational rate, tbc = st->codec->time_base;

  1693.             // Default component depth to 8

  1694.             sc->component_depth = 8;

  1695.             mxf->timecode_base = (tbc.den + tbc.num/2) / tbc.num;

  1696.             spf = ff_mxf_get_samples_per_frame(s, tbc);

  1697.             if (!spf) {

  1698.                 av_log(s, AV_LOG_ERROR, "Unsupported video frame rate %d/%d\n",

  1699.                        tbc.den, tbc.num);

  1700.                 return AVERROR(EINVAL);

  1701.             }

  1702.             mxf->time_base = spf->time_base;

  1703.             rate = av_inv_q(mxf->time_base);

  1704.             avpriv_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);

  1705.             if (!tcr)

  1706.                 tcr = av_dict_get(st->metadata, "timecode", NULL, 0);

  1707.             if (tcr)

  1708.                 ret = av_timecode_init_from_string(&mxf->tc, rate, tcr->value, s);

  1709.             else

  1710.                 ret = av_timecode_init(&mxf->tc, rate, 0, 0, s);

  1711.             if (ret < 0)

  1712.                 return ret;

  1713.             sc->video_bit_rate = st->codec->bit_rate ? st->codec->bit_rate : st->codec->rc_max_rate;

  1714.             if (s->oformat == &ff_mxf_d10_muxer) {

  1715.                 if (sc->video_bit_rate == 50000000) {

  1716.                     if (mxf->time_base.den == 25) sc->index = 3;

  1717.                     else                          sc->index = 5;

  1718.                 } else if (sc->video_bit_rate == 40000000) {

  1719.                     if (mxf->time_base.den == 25) sc->index = 7;

  1720.                     else                          sc->index = 9;

  1721.                 } else if (sc->video_bit_rate == 30000000) {

  1722.                     if (mxf->time_base.den == 25) sc->index = 11;

  1723.                     else                          sc->index = 13;

  1724.                 } else {

  1725.                     av_log(s, AV_LOG_ERROR, "error MXF D-10 only support 30/40/50 mbit/s\n");

  1726.                     return -1;

  1727.                 }

  1728. 

  1729.                 mxf->edit_unit_byte_count = KAG_SIZE; // system element

  1730.                 mxf->edit_unit_byte_count += 16 + 4 + (uint64_t)sc->video_bit_rate *

  1731.                     mxf->time_base.num / (8*mxf->time_base.den);

  1732.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1733.                 mxf->edit_unit_byte_count += 16 + 4 + 4 + spf->samples_per_frame[0]*8*4;

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

  1735.             }

  1736.         } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

  1737.             if (st->codec->sample_rate != 48000) {

  1738.                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");

  1739.                 return -1;

  1740.             }

  1741.             avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);

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

  1743.                 if (st->index != 1) {

  1744.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support one audio track\n");

  1745.                     return -1;

  1746.                 }

  1747.                 if (st->codec->codec_id != AV_CODEC_ID_PCM_S16LE &&

  1748.                     st->codec->codec_id != AV_CODEC_ID_PCM_S24LE) {

  1749.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support 16 or 24 bits le audio\n");

  1750.                 }

  1751.                 sc->index = ((MXFStreamContext*)s->streams[0]->priv_data)->index + 1;

  1752.             } else

  1753.             mxf->slice_count = 1;

  1754.         }

  1755. 

  1756.         if (!sc->index) {

  1757.             sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);

  1758.             if (sc->index == -1) {

  1759.                 av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "

  1760.                        "codec not currently supported in container\n", i);

  1761.                 return -1;

  1762.             }

  1763.         }

  1764. 

  1765.         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;

  1766. 

  1767.         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);

  1768.         sc->track_essence_element_key[15] = present[sc->index];

  1769.         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);

  1770. 

  1771.         if (!present[sc->index])

  1772.             mxf->essence_container_count++;

  1773.         present[sc->index]++;

  1774.     }

  1775. 

  1776.     if (s->oformat == &ff_mxf_d10_muxer) {

  1777.         mxf->essence_container_count = 1;

  1778.     }

  1779. 

  1780.     if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))

  1781.         mxf_gen_umid(s);

  1782. 

  1783.     for (i = 0; i < s->nb_streams; i++) {

  1784.         MXFStreamContext *sc = s->streams[i]->priv_data;

  1785.         // update element count

  1786.         sc->track_essence_element_key[13] = present[sc->index];

  1787.         if (!memcmp(sc->track_essence_element_key, mxf_essence_container_uls[15].element_ul, 13)) // DV

  1788.             sc->order = (0x15 << 24) | AV_RB32(sc->track_essence_element_key+13);

  1789.         else

  1790.             sc->order = AV_RB32(sc->track_essence_element_key+12);

  1791.     }

  1792. 

  1793.     if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))

  1794.         timestamp = ff_iso8601_to_unix_time(t->value);

  1795.     if (timestamp)

  1796.         mxf->timestamp = mxf_parse_timestamp(timestamp);

  1797.     mxf->duration = -1;

  1798. 

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

  1800.     if (!mxf->timecode_track)

  1801.         return AVERROR(ENOMEM);

  1802.     mxf->timecode_track->priv_data = av_mallocz(sizeof(MXFStreamContext));

  1803.     if (!mxf->timecode_track->priv_data)

  1804.         return AVERROR(ENOMEM);

  1805.     mxf->timecode_track->index = -1;

  1806. 

  1807.     if (!spf)

  1808.         spf = ff_mxf_get_samples_per_frame(s, (AVRational){ 1, 25 });

  1809. 

  1810.     if (ff_audio_interleave_init(s, spf->samples_per_frame, mxf->time_base) < 0)

  1811.         return -1;

  1812. 

  1813.     return 0;

  1814. }

  1815. 

  1816. static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };

  1817. 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 };

  1818. 

  1819. static void mxf_write_system_item(AVFormatContext *s)

  1820. {

  1821.     MXFContext *mxf = s->priv_data;

  1822.     AVIOContext *pb = s->pb;

  1823.     unsigned frame;

  1824.     uint32_t time_code;

  1825. 

  1826.     frame = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  1827. 

  1828.     // write system metadata pack

  1829.     avio_write(pb, system_metadata_pack_key, 16);

  1830.     klv_encode_ber4_length(pb, 57);

  1831.     avio_w8(pb, 0x5c); // UL, user date/time stamp, picture and sound item present

  1832.     avio_w8(pb, 0x04); // content package rate

  1833.     avio_w8(pb, 0x00); // content package type

  1834.     avio_wb16(pb, 0x00); // channel handle

  1835.     avio_wb16(pb, (mxf->tc.start + frame) & 0xFFFF); // continuity count, supposed to overflow

  1836.     if (mxf->essence_container_count > 1)

  1837.         avio_write(pb, multiple_desc_ul, 16);

  1838.     else {

  1839.         MXFStreamContext *sc = s->streams[0]->priv_data;

  1840.         avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);

  1841.     }

  1842.     avio_w8(pb, 0);

  1843.     avio_wb64(pb, 0);

  1844.     avio_wb64(pb, 0); // creation date/time stamp

  1845. 

  1846.     avio_w8(pb, 0x81); // SMPTE 12M time code

  1847.     time_code = av_timecode_get_smpte_from_framenum(&mxf->tc, frame);

  1848.     avio_wb32(pb, time_code);

  1849.     avio_wb32(pb, 0); // binary group data

  1850.     avio_wb64(pb, 0);

  1851. 

  1852.     // write system metadata package set

  1853.     avio_write(pb, system_metadata_package_set_key, 16);

  1854.     klv_encode_ber4_length(pb, 35);

  1855.     avio_w8(pb, 0x83); // UMID

  1856.     avio_wb16(pb, 0x20);

  1857.     mxf_write_umid(s, 1);

  1858. }

  1859. 

  1860. static void mxf_write_d10_video_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1861. {

  1862.     MXFContext *mxf = s->priv_data;

  1863.     AVIOContext *pb = s->pb;

  1864.     MXFStreamContext *sc = st->priv_data;

  1865.     int packet_size = (uint64_t)sc->video_bit_rate*mxf->time_base.num /

  1866.         (8*mxf->time_base.den); // frame size

  1867.     int pad;

  1868. 

  1869.     packet_size += 16 + 4;

  1870.     packet_size += klv_fill_size(packet_size);

  1871. 

  1872.     klv_encode_ber4_length(pb, pkt->size);

  1873.     avio_write(pb, pkt->data, pkt->size);

  1874. 

  1875.     // ensure CBR muxing by padding to correct video frame size

  1876.     pad = packet_size - pkt->size - 16 - 4;

  1877.     if (pad > 20) {

  1878.         avio_write(s->pb, klv_fill_key, 16);

  1879.         pad -= 16 + 4;

  1880.         klv_encode_ber4_length(s->pb, pad);

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

  1882.         av_assert1(!(avio_tell(s->pb) & (KAG_SIZE-1)));

  1883.     } else {

  1884.         av_log(s, AV_LOG_WARNING, "cannot fill d-10 video packet\n");

  1885.         ffio_fill(s->pb, 0, pad);

  1886.     }

  1887. }

  1888. 

  1889. static void mxf_write_d10_audio_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1890. {

  1891.     MXFContext *mxf = s->priv_data;

  1892.     AVIOContext *pb = s->pb;

  1893.     int frame_size = pkt->size / st->codec->block_align;

  1894.     uint8_t *samples = pkt->data;

  1895.     uint8_t *end = pkt->data + pkt->size;

  1896.     int i;

  1897. 

  1898.     klv_encode_ber4_length(pb, 4 + frame_size*4*8);

  1899. 

  1900.     avio_w8(pb, (frame_size == 1920 ? 0 : (mxf->edit_units_count-1) % 5 + 1));

  1901.     avio_wl16(pb, frame_size);

  1902.     avio_w8(pb, (1<<st->codec->channels)-1);

  1903. 

  1904.     while (samples < end) {

  1905.         for (i = 0; i < st->codec->channels; i++) {

  1906.             uint32_t sample;

  1907.             if (st->codec->codec_id == AV_CODEC_ID_PCM_S24LE) {

  1908.                 sample = AV_RL24(samples)<< 4;

  1909.                 samples += 3;

  1910.             } else {

  1911.                 sample = AV_RL16(samples)<<12;

  1912.                 samples += 2;

  1913.             }

  1914.             avio_wl32(pb, sample | i);

  1915.         }

  1916.         for (; i < 8; i++)

  1917.             avio_wl32(pb, i);

  1918.     }

  1919. }

  1920. 

  1921. static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)

  1922. {

  1923.     MXFContext *mxf = s->priv_data;

  1924.     AVIOContext *pb = s->pb;

  1925.     AVStream *st = s->streams[pkt->stream_index];

  1926.     MXFStreamContext *sc = st->priv_data;

  1927.     MXFIndexEntry ie = {0};

  1928.     int err;

  1929. 

  1930.     if (!mxf->edit_unit_byte_count && !(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {

  1931.         if ((err = av_reallocp_array(&mxf->index_entries, mxf->edit_units_count

  1932.                                      + EDIT_UNITS_PER_BODY, sizeof(*mxf->index_entries))) < 0) {

  1933.             mxf->edit_units_count = 0;

  1934.             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");

  1935.             return err;

  1936.         }

  1937.     }

  1938. 

  1939.     if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO) {

  1940.         if (!mxf_parse_mpeg2_frame(s, st, pkt, &ie)) {

  1941.             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");

  1942.             return -1;

  1943.         }

  1944.     } else if (st->codec->codec_id == AV_CODEC_ID_DNXHD) {

  1945.         if (!mxf_parse_dnxhd_frame(s, st, pkt)) {

  1946.             av_log(s, AV_LOG_ERROR, "could not get dnxhd profile\n");

  1947.             return -1;

  1948.         }

  1949.     } else if (st->codec->codec_id == AV_CODEC_ID_DVVIDEO) {

  1950.         if (!mxf_parse_dv_frame(s, st, pkt)) {

  1951.             av_log(s, AV_LOG_ERROR, "could not get dv profile\n");

  1952.             return -1;

  1953.         }

  1954.     }

  1955. 

  1956.     if (!mxf->header_written) {

  1957.         if (mxf->edit_unit_byte_count) {

  1958.             if ((err = mxf_write_partition(s, 1, 2, header_open_partition_key, 1)) < 0)

  1959.                 return err;

  1960.             mxf_write_klv_fill(s);

  1961.             mxf_write_index_table_segment(s);

  1962.         } else {

  1963.             if ((err = mxf_write_partition(s, 0, 0, header_open_partition_key, 1)) < 0)

  1964.                 return err;

  1965.         }

  1966.         mxf->header_written = 1;

  1967.     }

  1968. 

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

  1970.         if (!mxf->edit_unit_byte_count &&

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

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

  1973.             mxf_write_klv_fill(s);

  1974.             if ((err = mxf_write_partition(s, 1, 2, body_partition_key, 0)) < 0)

  1975.                 return err;

  1976.             mxf_write_klv_fill(s);

  1977.             mxf_write_index_table_segment(s);

  1978.         }

  1979. 

  1980.         mxf_write_klv_fill(s);

  1981.         mxf_write_system_item(s);

  1982. 

  1983.         if (!mxf->edit_unit_byte_count) {

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

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

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

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

  1988.         }

  1989.         mxf->edit_units_count++;

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

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

  1992.             mxf->body_offset - mxf->index_entries[mxf->edit_units_count-1].offset;

  1993.     }

  1994. 

  1995.     mxf_write_klv_fill(s);

  1996.     avio_write(pb, sc->track_essence_element_key, 16); // write key

  1997.     if (s->oformat == &ff_mxf_d10_muxer) {

  1998.         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)

  1999.             mxf_write_d10_video_packet(s, st, pkt);

  2000.         else

  2001.             mxf_write_d10_audio_packet(s, st, pkt);

  2002.     } else {

  2003.         klv_encode_ber4_length(pb, pkt->size); // write length

  2004.         avio_write(pb, pkt->data, pkt->size);

  2005.         mxf->body_offset += 16+4+pkt->size + klv_fill_size(16+4+pkt->size);

  2006.     }

  2007. 

  2008.     avio_flush(pb);

  2009. 

  2010.     return 0;

  2011. }

  2012. 

  2013. static void mxf_write_random_index_pack(AVFormatContext *s)

  2014. {

  2015.     MXFContext *mxf = s->priv_data;

  2016.     AVIOContext *pb = s->pb;

  2017.     uint64_t pos = avio_tell(pb);

  2018.     int i;

  2019. 

  2020.     avio_write(pb, random_index_pack_key, 16);

  2021.     klv_encode_ber_length(pb, 28 + 12LL*mxf->body_partitions_count);

  2022. 

  2023.     if (mxf->edit_unit_byte_count)

  2024.         avio_wb32(pb, 1); // BodySID of header partition

  2025.     else

  2026.         avio_wb32(pb, 0);

  2027.     avio_wb64(pb, 0); // offset of header partition

  2028. 

  2029.     for (i = 0; i < mxf->body_partitions_count; i++) {

  2030.         avio_wb32(pb, 1); // BodySID

  2031.         avio_wb64(pb, mxf->body_partition_offset[i]);

  2032.     }

  2033. 

  2034.     avio_wb32(pb, 0); // BodySID of footer partition

  2035.     avio_wb64(pb, mxf->footer_partition_offset);

  2036. 

  2037.     avio_wb32(pb, avio_tell(pb) - pos + 4);

  2038. }

  2039. 

  2040. static int mxf_write_footer(AVFormatContext *s)

  2041. {

  2042.     MXFContext *mxf = s->priv_data;

  2043.     AVIOContext *pb = s->pb;

  2044.     int err;

  2045. 

  2046.     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  2047. 

  2048.     mxf_write_klv_fill(s);

  2049.     mxf->footer_partition_offset = avio_tell(pb);

  2050.     if (mxf->edit_unit_byte_count) { // no need to repeat index

  2051.         if ((err = mxf_write_partition(s, 0, 0, footer_partition_key, 0)) < 0)

  2052.             return err;

  2053.     } else {

  2054.         if ((err = mxf_write_partition(s, 0, 2, footer_partition_key, 0)) < 0)

  2055.             return err;

  2056.         mxf_write_klv_fill(s);

  2057.         mxf_write_index_table_segment(s);

  2058.     }

  2059. 

  2060.     mxf_write_klv_fill(s);

  2061.     mxf_write_random_index_pack(s);

  2062. 

  2063.     if (s->pb->seekable) {

  2064.         avio_seek(pb, 0, SEEK_SET);

  2065.         if (mxf->edit_unit_byte_count) {

  2066.             if ((err = mxf_write_partition(s, 1, 2, header_closed_partition_key, 1)) < 0)

  2067.                 return err;

  2068.             mxf_write_klv_fill(s);

  2069.             mxf_write_index_table_segment(s);

  2070.         } else {

  2071.             if ((err = mxf_write_partition(s, 0, 0, header_closed_partition_key, 1)) < 0)

  2072.                 return err;

  2073.         }

  2074.     }

  2075. 

  2076.     ff_audio_interleave_close(s);

  2077. 

  2078.     av_freep(&mxf->index_entries);

  2079.     av_freep(&mxf->body_partition_offset);

  2080.     av_freep(&mxf->timecode_track->priv_data);

  2081.     av_freep(&mxf->timecode_track);

  2082. 

  2083.     mxf_free(s);

  2084. 

  2085.     return 0;

  2086. }

  2087. 

  2088. static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  2089. {

  2090.     int i, stream_count = 0;

  2091. 

  2092.     for (i = 0; i < s->nb_streams; i++)

  2093.         stream_count += !!s->streams[i]->last_in_packet_buffer;

  2094. 

  2095.     if (stream_count && (s->nb_streams == stream_count || flush)) {

  2096.         AVPacketList *pktl = s->packet_buffer;

  2097.         if (s->nb_streams != stream_count) {

  2098.             AVPacketList *last = NULL;

  2099.             // find last packet in edit unit

  2100.             while (pktl) {

  2101.                 if (!stream_count || pktl->pkt.stream_index == 0)

  2102.                     break;

  2103.                 last = pktl;

  2104.                 pktl = pktl->next;

  2105.                 stream_count--;

  2106.             }

  2107.             // purge packet queue

  2108.             while (pktl) {

  2109.                 AVPacketList *next = pktl->next;

  2110. 

  2111.                 if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)

  2112.                     s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;

  2113.                 av_free_packet(&pktl->pkt);

  2114.                 av_freep(&pktl);

  2115.                 pktl = next;

  2116.             }

  2117.             if (last)

  2118.                 last->next = NULL;

  2119.             else {

  2120.                 s->packet_buffer = NULL;

  2121.                 s->packet_buffer_end= NULL;

  2122.                 goto out;

  2123.             }

  2124.             pktl = s->packet_buffer;

  2125.         }

  2126. 

  2127.         *out = pktl->pkt;

  2128.         av_dlog(s, "out st:%d dts:%"PRId64"\n", (*out).stream_index, (*out).dts);

  2129.         s->packet_buffer = pktl->next;

  2130.         if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)

  2131.             s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;

  2132.         if(!s->packet_buffer)

  2133.             s->packet_buffer_end= NULL;

  2134.         av_freep(&pktl);

  2135.         return 1;

  2136.     } else {

  2137.     out:

  2138.         av_init_packet(out);

  2139.         return 0;

  2140.     }

  2141. }

  2142. 

  2143. static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)

  2144. {

  2145.     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;

  2146.     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;

  2147. 

  2148.     return next->dts > pkt->dts ||

  2149.         (next->dts == pkt->dts && sc->order < sc2->order);

  2150. }

  2151. 

  2152. static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  2153. {

  2154.     return ff_audio_rechunk_interleave(s, out, pkt, flush,

  2155.                                mxf_interleave_get_packet, mxf_compare_timestamps);

  2156. }

  2157. 

  2158. AVOutputFormat ff_mxf_muxer = {

  2159.     .name              = "mxf",

  2160.     .long_name         = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),

  2161.     .mime_type         = "application/mxf",

  2162.     .extensions        = "mxf",

  2163.     .priv_data_size    = sizeof(MXFContext),

  2164.     .audio_codec       = AV_CODEC_ID_PCM_S16LE,

  2165.     .video_codec       = AV_CODEC_ID_MPEG2VIDEO,

  2166.     .write_header      = mxf_write_header,

  2167.     .write_packet      = mxf_write_packet,

  2168.     .write_trailer     = mxf_write_footer,

  2169.     .flags             = AVFMT_NOTIMESTAMPS,

  2170.     .interleave_packet = mxf_interleave,

  2171. };

  2172. 

  2173. AVOutputFormat ff_mxf_d10_muxer = {

  2174.     .name              = "mxf_d10",

  2175.     .long_name         = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format) D-10 Mapping"),

  2176.     .mime_type         = "application/mxf",

  2177.     .priv_data_size    = sizeof(MXFContext),

  2178.     .audio_codec       = AV_CODEC_ID_PCM_S16LE,

  2179.     .video_codec       = AV_CODEC_ID_MPEG2VIDEO,

  2180.     .write_header      = mxf_write_header,

  2181.     .write_packet      = mxf_write_packet,

  2182.     .write_trailer     = mxf_write_footer,

  2183.     .flags             = AVFMT_NOTIMESTAMPS,

  2184.     .interleave_packet = mxf_interleave,

  2185. };