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FFmpeg/libavformat/mxfenc.c

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  1. /*

  2.  * MXF muxer

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

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

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

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

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

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

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

  12.  *

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

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

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

  16.  * Lesser General Public License for more details.

  17.  *

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

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

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

  21.  */

  22. 

  23. /*

  24.  * References

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

  26.  * SMPTE 377M MXF File Format Specifications

  27.  * SMPTE 379M MXF Generic Container

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

  29.  * SMPTE RP210: SMPTE Metadata Dictionary

  30.  * SMPTE RP224: Registry of SMPTE Universal Labels

  31.  */

  32. 

  33. //#define DEBUG

  34. 

  35. #include <math.h>

  36. #include <time.h>

  37. 

  38. #include "libavutil/opt.h"

  39. #include "libavutil/random_seed.h"

  40. #include "libavutil/timecode.h"

  41. #include "libavutil/avassert.h"

  42. #include "libavcodec/bytestream.h"

  43. #include "libavcodec/dnxhddata.h"

  44. #include "audiointerleave.h"

  45. #include "avformat.h"

  46. #include "internal.h"

  47. #include "mxf.h"

  48. #include "config.h"

  49. 

  50. typedef struct {

  51.     struct AVRational time_base;

  52.     int samples_per_frame[6];

  53. } MXFSamplesPerFrame;

  54. 

  55. static const MXFSamplesPerFrame mxf_samples_per_frames[] = {

  56.     { { 1001, 24000 }, { 2002, 0,    0,    0,    0,    0 } }, // FILM 23.976

  57.     { { 1, 24},        { 2000, 0,    0,    0,    0,    0 } }, // FILM 24

  58.     { { 1001, 30000 }, { 1602, 1601, 1602, 1601, 1602, 0 } }, // NTSC 29.97

  59.     { { 1001, 60000 }, { 801,  801,  801,  801,  800,  0 } }, // NTSC 59.94

  60.     { { 1, 25 },       { 1920, 0,    0,    0,    0,    0 } }, // PAL 25

  61.     { { 1, 50 },       { 960,  0,    0,    0,    0,    0 } }, // PAL 50

  62. };

  63. 

  64. static const MXFSamplesPerFrame* mxf_get_samples_per_frame(AVFormatContext *s, AVRational time_base)

  65. {

  66.     int i;

  67.     for (i = 0; i < FF_ARRAY_ELEMS(mxf_samples_per_frames); i++) {

  68.         if (!av_cmp_q(mxf_samples_per_frames[i].time_base, time_base))

  69.             return &mxf_samples_per_frames[i];

  70.     }

  71. 

  72.     // Find closest container time base for approximative codec time base like 1/29.97, 1/30, ...

  73.     for (i = 0; i < FF_ARRAY_ELEMS(mxf_samples_per_frames); i++) {

  74.         if (fabs(av_q2d(mxf_samples_per_frames[i].time_base) - av_q2d(time_base)) < 0.0001) {

  75.             av_log(s, AV_LOG_WARNING, "%d/%d input time base matched %d/%d container time base\n",

  76.                    time_base.num, time_base.den,

  77.                    mxf_samples_per_frames[i].time_base.num, mxf_samples_per_frames[i].time_base.den);

  78.             return &mxf_samples_per_frames[i];

  79.         }

  80.     }

  81.     return NULL;

  82. }

  83. 

  84. extern AVOutputFormat ff_mxf_d10_muxer;

  85. 

  86. #define EDIT_UNITS_PER_BODY 250

  87. #define KAG_SIZE 512

  88. 

  89. typedef struct {

  90.     int local_tag;

  91.     UID uid;

  92. } MXFLocalTagPair;

  93. 

  94. typedef struct {

  95.     uint8_t flags;

  96.     uint64_t offset;

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

  98.     uint16_t temporal_ref;

  99. } MXFIndexEntry;

  100. 

  101. typedef struct {

  102.     AudioInterleaveContext aic;

  103.     UID track_essence_element_key;

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

  105.     const UID *codec_ul;

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

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

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

  109.     int component_depth;

  110.     int temporal_reordering;

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

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

  113. } MXFStreamContext;

  114. 

  115. typedef struct {

  116.     UID container_ul;

  117.     UID element_ul;

  118.     UID codec_ul;

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

  120. } MXFContainerEssenceEntry;

  121. 

  122. static const struct {

  123.     enum AVCodecID id;

  124.     int index;

  125. } mxf_essence_mappings[] = {

  126.     { AV_CODEC_ID_MPEG2VIDEO, 0 },

  127.     { AV_CODEC_ID_PCM_S24LE,  1 },

  128.     { AV_CODEC_ID_PCM_S16LE,  1 },

  129.     { AV_CODEC_ID_DVVIDEO,   15 },

  130.     { AV_CODEC_ID_DNXHD,     24 },

  131.     { AV_CODEC_ID_NONE }

  132. };

  133. 

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

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

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

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

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

  139. 

  140. static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {

  141.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },

  142.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  143.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },

  144.       mxf_write_mpegvideo_desc },

  145.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },

  146.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },

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

  148.       mxf_write_aes3_desc },

  149.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },

  150.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },

  151.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  152.       mxf_write_wav_desc },

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

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

  155.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  157.       mxf_write_cdci_desc },

  158.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },

  159.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  160.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  161.       mxf_write_generic_sound_desc },

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

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

  164.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  166.       mxf_write_cdci_desc },

  167.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },

  168.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  169.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  170.       mxf_write_generic_sound_desc },

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

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

  173.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  175.       mxf_write_cdci_desc },

  176.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },

  177.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

  178.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  179.       mxf_write_generic_sound_desc },

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

  181.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },

  182.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  184.       mxf_write_cdci_desc },

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

  186.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

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

  188.       mxf_write_generic_sound_desc },

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

  190.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },

  191.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

  192.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 },

  193.       mxf_write_cdci_desc },

  194.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },

  195.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

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

  197.       mxf_write_generic_sound_desc },

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

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

  200.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },

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

  202.       mxf_write_cdci_desc },

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

  204.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },

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

  206.       mxf_write_generic_sound_desc },

  207.     // DV Unknwon

  208.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x7F,0x01 },

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

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

  211.       mxf_write_cdci_desc },

  212.     // DV25 525/60

  213.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x40,0x01 },

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

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

  216.       mxf_write_cdci_desc },

  217.     // DV25 625/50

  218.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 },

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

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

  221.       mxf_write_cdci_desc },

  222.     // DV50 525/60

  223.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x50,0x01 },

  224.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

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

  226.       mxf_write_cdci_desc },

  227.     // DV50 625/50

  228.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x51,0x01 },

  229.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

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

  231.       mxf_write_cdci_desc },

  232.     // DV100 1080/60

  233.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x60,0x01 },

  234.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  235.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x05,0x00 },

  236.       mxf_write_cdci_desc },

  237.     // DV100 1080/50

  238.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x61,0x01 },

  239.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

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

  241.       mxf_write_cdci_desc },

  242.     // DV100 720/60

  243.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x62,0x01 },

  244.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  245.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x07,0x00 },

  246.       mxf_write_cdci_desc },

  247.     // DV100 720/50

  248.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x63,0x01 },

  249.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x18,0x01,0x01,0x00 },

  250.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x08,0x00 },

  251.       mxf_write_cdci_desc },

  252.     // DNxHD 1080p 10bit high

  253.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  254.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  255.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x01,0x00,0x00 },

  256.       mxf_write_cdci_desc },

  257.     // DNxHD 1080p 8bit medium

  258.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  259.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  260.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x03,0x00,0x00 },

  261.       mxf_write_cdci_desc },

  262.     // DNxHD 1080p 8bit high

  263.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  264.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  265.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x04,0x00,0x00 },

  266.       mxf_write_cdci_desc },

  267.     // DNxHD 1080i 10bit high

  268.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  269.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  270.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x07,0x00,0x00 },

  271.       mxf_write_cdci_desc },

  272.     // DNxHD 1080i 8bit medium

  273.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  274.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  275.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x08,0x00,0x00 },

  276.       mxf_write_cdci_desc },

  277.     // DNxHD 1080i 8bit high

  278.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  279.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  280.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x09,0x00,0x00 },

  281.       mxf_write_cdci_desc },

  282.     // DNxHD 720p 10bit

  283.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  284.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  285.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x10,0x00,0x00 },

  286.       mxf_write_cdci_desc },

  287.     // DNxHD 720p 8bit high

  288.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  289.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  290.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x11,0x00,0x00 },

  291.       mxf_write_cdci_desc },

  292.     // DNxHD 720p 8bit medium

  293.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  294.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  295.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x12,0x00,0x00 },

  296.       mxf_write_cdci_desc },

  297.     // DNxHD 720p 8bit low

  298.     { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 },

  299.       { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  300.       { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x71,0x13,0x00,0x00 },

  301.       mxf_write_cdci_desc },

  302.     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  303.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  304.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  305.       NULL },

  306. };

  307. 

  308. typedef struct MXFContext {

  309.     AVClass *av_class;

  310.     int64_t footer_partition_offset;

  311.     int essence_container_count;

  312.     AVRational time_base;

  313.     int header_written;

  314.     MXFIndexEntry *index_entries;

  315.     unsigned edit_units_count;

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

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

  318.     int last_indexed_edit_unit;

  319.     uint64_t *body_partition_offset;

  320.     unsigned body_partitions_count;

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

  322.     uint64_t duration;

  323.     AVTimecode tc;       ///< timecode context

  324.     AVStream *timecode_track;

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

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

  327.     uint64_t body_offset;

  328.     uint32_t instance_number;

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

  330. } MXFContext;

  331. 

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

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

  334. 

  335. /**

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

  337.  */

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

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

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

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

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

  343. 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

  344. 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

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

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

  347. 

  348. /**

  349.  * partial key for header metadata

  350.  */

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

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

  353. 

  354. /**

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

  356.  */

  357. static const MXFLocalTagPair mxf_local_tag_batch[] = {

  358.     // preface set

  359.     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */

  360.     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */

  361.     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */

  362.     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */

  363.     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */

  364.     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */

  365.     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */

  366.     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */

  367.     // Identification

  368.     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */

  369.     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */

  370.     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */

  371.     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */

  372.     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */

  373.     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */

  374.     // Content Storage

  375.     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */

  376.     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */

  377.     // Essence Container Data

  378.     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */

  379.     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */

  380.     // Package

  381.     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */

  382.     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */

  383.     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */

  384.     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */

  385.     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */

  386.     // Track

  387.     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */

  388.     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */

  389.     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */

  390.     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */

  391.     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */

  392.     // Sequence

  393.     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */

  394.     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */

  395.     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */

  396.     // Source Clip

  397.     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */

  398.     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */

  399.     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */

  400.     // Timecode Component

  401.     { 0x1501, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x05,0x00,0x00}}, /* Start Time Code */

  402.     { 0x1502, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x04,0x01,0x01,0x02,0x06,0x00,0x00}}, /* Rounded Time Code Base */

  403.     { 0x1503, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x04,0x01,0x01,0x05,0x00,0x00,0x00}}, /* Drop Frame */

  404.     // File Descriptor

  405.     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */

  406.     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */

  407.     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */

  408.     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */

  409.     // Generic Picture Essence Descriptor

  410.     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */

  411.     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */

  412.     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */

  413.     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */

  414.     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */

  415.     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */

  416.     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */

  417.     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */

  418.     { 0x3212, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x01,0x06,0x00,0x00,0x00}}, /* Field Dominance (Opt) */

  419.     // CDCI Picture Essence Descriptor

  420.     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */

  421.     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */

  422.     // Generic Sound Essence Descriptor

  423.     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */

  424.     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */

  425.     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */

  426.     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */

  427.     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */

  428.     // Index Table Segment

  429.     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */

  430.     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */

  431.     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */

  432.     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */

  433.     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */

  434.     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */

  435.     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */

  436.     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */

  437.     // MPEG video Descriptor

  438.     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */

  439.     { 0x8007, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0A,0x00,0x00}}, /* ProfileAndLevel */

  440.     // Wave Audio Essence Descriptor

  441.     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */

  442.     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */

  443. };

  444. 

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

  446. {

  447.     avio_write(pb, uuid_base, 12);

  448.     avio_wb16(pb, type);

  449.     avio_wb16(pb, value);

  450. }

  451. 

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

  453. {

  454.     MXFContext *mxf = s->priv_data;

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

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

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

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

  459. }

  460. 

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

  462. {

  463.     avio_wb32(pb, ref_count);

  464.     avio_wb32(pb, 16);

  465. }

  466. 

  467. static int klv_ber_length(uint64_t len)

  468. {

  469.     if (len < 128)

  470.         return 1;

  471.     else

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

  473. }

  474. 

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

  476. {

  477.     // Determine the best BER size

  478.     int size;

  479.     if (len < 128) {

  480.         //short form

  481.         avio_w8(pb, len);

  482.         return 1;

  483.     }

  484. 

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

  486. 

  487.     // long form

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

  489.     while(size) {

  490.         size--;

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

  492.     }

  493.     return 0;

  494. }

  495. 

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

  497. {

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

  499.     avio_wb24(pb, len);

  500. }

  501. 

  502. /*

  503.  * Get essence container ul index

  504.  */

  505. static int mxf_get_essence_container_ul_index(enum AVCodecID id)

  506. {

  507.     int i;

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

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

  510.             return mxf_essence_mappings[i].index;

  511.     return -1;

  512. }

  513. 

  514. static void mxf_write_primer_pack(AVFormatContext *s)

  515. {

  516.     AVIOContext *pb = s->pb;

  517.     int local_tag_number, i = 0;

  518. 

  519.     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);

  520. 

  521.     avio_write(pb, primer_pack_key, 16);

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

  523. 

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

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

  526. 

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

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

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

  530.     }

  531. }

  532. 

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

  534. {

  535.     avio_wb16(pb, tag);

  536.     avio_wb16(pb, size);

  537. }

  538. 

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

  540. {

  541.     avio_write(pb, header_metadata_key, 13);

  542.     avio_wb24(pb, value);

  543. }

  544. 

  545. static void mxf_free(AVFormatContext *s)

  546. {

  547.     int i;

  548. 

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

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

  551.         av_freep(&st->priv_data);

  552.     }

  553. }

  554. 

  555. static const MXFCodecUL *mxf_get_data_definition_ul(int type)

  556. {

  557.     const MXFCodecUL *uls = ff_mxf_data_definition_uls;

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

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

  560.             break;

  561.         uls++;

  562.     }

  563.     return uls;

  564. }

  565. 

  566. static void mxf_write_essence_container_refs(AVFormatContext *s)

  567. {

  568.     MXFContext *c = s->priv_data;

  569.     AVIOContext *pb = s->pb;

  570.     int i;

  571. 

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

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

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

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

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

  577.     }

  578. }

  579. 

  580. static void mxf_write_preface(AVFormatContext *s)

  581. {

  582.     MXFContext *mxf = s->priv_data;

  583.     AVIOContext *pb = s->pb;

  584. 

  585.     mxf_write_metadata_key(pb, 0x012f00);

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

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

  588. 

  589.     // write preface set uid

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

  591.     mxf_write_uuid(pb, Preface, 0);

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

  593. 

  594.     // last modified date

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

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

  597. 

  598.     // write version

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

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

  601. 

  602.     // write identification_refs

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

  604.     mxf_write_refs_count(pb, 1);

  605.     mxf_write_uuid(pb, Identification, 0);

  606. 

  607.     // write content_storage_refs

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

  609.     mxf_write_uuid(pb, ContentStorage, 0);

  610. 

  611.     // operational pattern

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

  613.     avio_write(pb, op1a_ul, 16);

  614. 

  615.     // write essence_container_refs

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

  617.     mxf_write_essence_container_refs(s);

  618. 

  619.     // write dm_scheme_refs

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

  621.     avio_wb64(pb, 0);

  622. }

  623. 

  624. /*

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

  626.  */

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

  628. {

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

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

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

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

  633. }

  634. 

  635. static void mxf_write_identification(AVFormatContext *s)

  636. {

  637.     MXFContext *mxf = s->priv_data;

  638.     AVIOContext *pb = s->pb;

  639.     const char *company = "FFmpeg";

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

  641.     const char *version;

  642.     int length;

  643. 

  644.     mxf_write_metadata_key(pb, 0x013000);

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

  646. 

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

  648.         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);

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

  650.     klv_encode_ber_length(pb, length);

  651. 

  652.     // write uid

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

  654.     mxf_write_uuid(pb, Identification, 0);

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

  656. 

  657.     // write generation uid

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

  659.     mxf_write_uuid(pb, Identification, 1);

  660. 

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

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

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

  664. 

  665.     // write product uid

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

  667.     mxf_write_uuid(pb, Identification, 2);

  668. 

  669.     // modification date

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

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

  672. }

  673. 

  674. static void mxf_write_content_storage(AVFormatContext *s)

  675. {

  676.     AVIOContext *pb = s->pb;

  677. 

  678.     mxf_write_metadata_key(pb, 0x011800);

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

  680.     klv_encode_ber_length(pb, 92);

  681. 

  682.     // write uid

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

  684.     mxf_write_uuid(pb, ContentStorage, 0);

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

  686. 

  687.     // write package reference

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

  689.     mxf_write_refs_count(pb, 2);

  690.     mxf_write_uuid(pb, MaterialPackage, 0);

  691.     mxf_write_uuid(pb, SourcePackage, 0);

  692. 

  693.     // write essence container data

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

  695.     mxf_write_refs_count(pb, 1);

  696.     mxf_write_uuid(pb, EssenceContainerData, 0);

  697. }

  698. 

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

  700. {

  701.     MXFContext *mxf = s->priv_data;

  702.     AVIOContext *pb = s->pb;

  703.     MXFStreamContext *sc = st->priv_data;

  704. 

  705.     mxf_write_metadata_key(pb, 0x013b00);

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

  707.     klv_encode_ber_length(pb, 80);

  708. 

  709.     // write track uid

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

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

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

  713. 

  714.     // write track id

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

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

  717. 

  718.     // write track number

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

  720.     if (type == MaterialPackage)

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

  722.     else

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

  724. 

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

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

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

  728. 

  729.     // write origin

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

  731.     avio_wb64(pb, 0);

  732. 

  733.     // write sequence refs

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

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

  736. }

  737. 

  738. 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 };

  739. 

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

  741. {

  742.     MXFContext *mxf = s->priv_data;

  743.     AVIOContext *pb = s->pb;

  744. 

  745.     // find data define uls

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

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

  748.         avio_write(pb, smpte_12m_timecode_track_data_ul, 16);

  749.     else {

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

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

  752.     }

  753. 

  754.     // write duration

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

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

  757. }

  758. 

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

  760. {

  761.     MXFContext *mxf = s->priv_data;

  762.     AVIOContext *pb = s->pb;

  763.     enum MXFMetadataSetType component;

  764. 

  765.     mxf_write_metadata_key(pb, 0x010f00);

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

  767.     klv_encode_ber_length(pb, 80);

  768. 

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

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

  771. 

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

  773.     mxf_write_common_fields(s, st);

  774. 

  775.     // write structural component

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

  777.     mxf_write_refs_count(pb, 1);

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

  779.         component = TimecodeComponent;

  780.     else

  781.         component = SourceClip;

  782.     if (type == SourcePackage)

  783.         component += TypeBottom;

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

  785. }

  786. 

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

  788. {

  789.     MXFContext *mxf = s->priv_data;

  790.     AVIOContext *pb = s->pb;

  791. 

  792.     mxf_write_metadata_key(pb, 0x011400);

  793.     klv_encode_ber_length(pb, 75);

  794. 

  795.     // UID

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

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

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

  799. 

  800.     mxf_write_common_fields(s, st);

  801. 

  802.     // Start Time Code

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

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

  805. 

  806.     // Rounded Time Code Base

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

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

  809. 

  810.     // Drop Frame

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

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

  813. }

  814. 

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

  816. {

  817.     AVIOContext *pb = s->pb;

  818.     int i;

  819. 

  820.     mxf_write_metadata_key(pb, 0x011100);

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

  822.     klv_encode_ber_length(pb, 108);

  823. 

  824.     // write uid

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

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

  827. 

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

  829.     mxf_write_common_fields(s, st);

  830. 

  831.     // write start_position

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

  833.     avio_wb64(pb, 0);

  834. 

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

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

  837.     if (type == SourcePackage) {

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

  839.             avio_wb64(pb, 0);

  840.     } else

  841.         mxf_write_umid(s, 1);

  842. 

  843.     // write source track id

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

  845.     if (type == SourcePackage)

  846.         avio_wb32(pb, 0);

  847.     else

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

  849. }

  850. 

  851. static void mxf_write_multi_descriptor(AVFormatContext *s)

  852. {

  853.     MXFContext *mxf = s->priv_data;

  854.     AVIOContext *pb = s->pb;

  855.     const uint8_t *ul;

  856.     int i;

  857. 

  858.     mxf_write_metadata_key(pb, 0x014400);

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

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

  861. 

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

  863.     mxf_write_uuid(pb, MultipleDescriptor, 0);

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

  865. 

  866.     // write sample rate

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

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

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

  870. 

  871.     // write essence container ul

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

  873.     if (mxf->essence_container_count > 1)

  874.         ul = multiple_desc_ul;

  875.     else {

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

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

  878.     }

  879.     avio_write(pb, ul, 16);

  880. 

  881.     // write sub descriptor refs

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

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

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

  885.         mxf_write_uuid(pb, SubDescriptor, i);

  886. }

  887. 

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

  889. {

  890.     MXFContext *mxf = s->priv_data;

  891.     MXFStreamContext *sc = st->priv_data;

  892.     AVIOContext *pb = s->pb;

  893. 

  894.     avio_write(pb, key, 16);

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

  896. 

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

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

  899. 

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

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

  902. 

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

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

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

  906. 

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

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

  909. }

  910. 

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

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

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

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

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

  916. 

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

  918. {

  919.     MXFStreamContext *sc = st->priv_data;

  920.     AVIOContext *pb = s->pb;

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

  922.     int display_height;

  923.     int f1, f2;

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

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

  926.         desc_size += 5;

  927. 

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

  929. 

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

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

  932. 

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

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

  935. 

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

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

  938. 

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

  940.         display_height = 576;

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

  942.         display_height = 486;

  943.     else

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

  945. 

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

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

  948. 

  949.     // component depth

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

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

  952. 

  953.     // horizontal subsampling

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

  955.     avio_wb32(pb, 2);

  956. 

  957.     // frame layout

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

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

  960. 

  961.     // video line map

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

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

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

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

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

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

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

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

  970.     }

  971. 

  972.     if (!sc->interlaced) {

  973.         f2  = 0;

  974.         f1 *= 2;

  975.     }

  976. 

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

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

  979.     avio_wb32(pb, 4);

  980.     avio_wb32(pb, f1);

  981.     if (sc->interlaced)

  982.         avio_wb32(pb, f2);

  983. 

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

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

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

  987. 

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

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

  990. 

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

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

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

  994.     }

  995. 

  996. }

  997. 

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

  999. {

  1000.     mxf_write_cdci_common(s, st, mxf_cdci_descriptor_key, 0);

  1001. }

  1002. 

  1003. static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)

  1004. {

  1005.     AVIOContext *pb = s->pb;

  1006.     int profile_and_level = (st->codec->profile<<4) | st->codec->level;

  1007. 

  1008.     mxf_write_cdci_common(s, st, mxf_mpegvideo_descriptor_key, 8+5);

  1009. 

  1010.     // bit rate

  1011.     mxf_write_local_tag(pb, 4, 0x8000);

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

  1013. 

  1014.     // profile and level

  1015.     mxf_write_local_tag(pb, 1, 0x8007);

  1016.     if (!st->codec->profile)

  1017.         profile_and_level |= 0x80; // escape bit

  1018.     avio_w8(pb, profile_and_level);

  1019. }

  1020. 

  1021. static void mxf_write_generic_sound_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)

  1022. {

  1023.     AVIOContext *pb = s->pb;

  1024. 

  1025.     mxf_write_generic_desc(s, st, key, size+5+12+8+8);

  1026. 

  1027.     // audio locked

  1028.     mxf_write_local_tag(pb, 1, 0x3D02);

  1029.     avio_w8(pb, 1);

  1030. 

  1031.     // write audio sampling rate

  1032.     mxf_write_local_tag(pb, 8, 0x3D03);

  1033.     avio_wb32(pb, st->codec->sample_rate);

  1034.     avio_wb32(pb, 1);

  1035. 

  1036.     mxf_write_local_tag(pb, 4, 0x3D07);

  1037.     avio_wb32(pb, st->codec->channels);

  1038. 

  1039.     mxf_write_local_tag(pb, 4, 0x3D01);

  1040.     avio_wb32(pb, av_get_bits_per_sample(st->codec->codec_id));

  1041. }

  1042. 

  1043. static void mxf_write_wav_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)

  1044. {

  1045.     AVIOContext *pb = s->pb;

  1046. 

  1047.     mxf_write_generic_sound_common(s, st, key, size+6+8);

  1048. 

  1049.     mxf_write_local_tag(pb, 2, 0x3D0A);

  1050.     avio_wb16(pb, st->codec->block_align);

  1051. 

  1052.     // avg bytes per sec

  1053.     mxf_write_local_tag(pb, 4, 0x3D09);

  1054.     avio_wb32(pb, st->codec->block_align*st->codec->sample_rate);

  1055. }

  1056. 

  1057. static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)

  1058. {

  1059.     mxf_write_wav_common(s, st, mxf_wav_descriptor_key, 0);

  1060. }

  1061. 

  1062. static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)

  1063. {

  1064.     mxf_write_wav_common(s, st, mxf_aes3_descriptor_key, 0);

  1065. }

  1066. 

  1067. static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st)

  1068. {

  1069.     mxf_write_generic_sound_common(s, st, mxf_generic_sound_descriptor_key, 0);

  1070. }

  1071. 

  1072. static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)

  1073. {

  1074.     MXFContext *mxf = s->priv_data;

  1075.     AVIOContext *pb = s->pb;

  1076.     int i, track_count = s->nb_streams+1;

  1077. 

  1078.     if (type == MaterialPackage) {

  1079.         mxf_write_metadata_key(pb, 0x013600);

  1080.         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);

  1081.         klv_encode_ber_length(pb, 92 + 16*track_count);

  1082.     } else {

  1083.         mxf_write_metadata_key(pb, 0x013700);

  1084.         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);

  1085.         klv_encode_ber_length(pb, 112 + 16*track_count); // 20 bytes length for descriptor reference

  1086.     }

  1087. 

  1088.     // write uid

  1089.     mxf_write_local_tag(pb, 16, 0x3C0A);

  1090.     mxf_write_uuid(pb, type, 0);

  1091.     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);

  1092.     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);

  1093. 

  1094.     // write package umid

  1095.     mxf_write_local_tag(pb, 32, 0x4401);

  1096.     mxf_write_umid(s, type == SourcePackage);

  1097.     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);

  1098. 

  1099.     // package creation date

  1100.     mxf_write_local_tag(pb, 8, 0x4405);

  1101.     avio_wb64(pb, mxf->timestamp);

  1102. 

  1103.     // package modified date

  1104.     mxf_write_local_tag(pb, 8, 0x4404);

  1105.     avio_wb64(pb, mxf->timestamp);

  1106. 

  1107.     // write track refs

  1108.     mxf_write_local_tag(pb, track_count*16 + 8, 0x4403);

  1109.     mxf_write_refs_count(pb, track_count);

  1110.     mxf_write_uuid(pb, type == MaterialPackage ? Track :

  1111.                    Track + TypeBottom, -1); // timecode track

  1112.     for (i = 0; i < s->nb_streams; i++)

  1113.         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);

  1114. 

  1115.     // write multiple descriptor reference

  1116.     if (type == SourcePackage) {

  1117.         mxf_write_local_tag(pb, 16, 0x4701);

  1118.         if (s->nb_streams > 1) {

  1119.             mxf_write_uuid(pb, MultipleDescriptor, 0);

  1120.             mxf_write_multi_descriptor(s);

  1121.         } else

  1122.             mxf_write_uuid(pb, SubDescriptor, 0);

  1123.     }

  1124. 

  1125.     // write timecode track

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

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

  1128.     mxf_write_timecode_component(s, mxf->timecode_track, type);

  1129. 

  1130.     for (i = 0; i < s->nb_streams; i++) {

  1131.         AVStream *st = s->streams[i];

  1132.         mxf_write_track(s, st, type);

  1133.         mxf_write_sequence(s, st, type);

  1134.         mxf_write_structural_component(s, st, type);

  1135. 

  1136.         if (type == SourcePackage) {

  1137.             MXFStreamContext *sc = st->priv_data;

  1138.             mxf_essence_container_uls[sc->index].write_desc(s, st);

  1139.         }

  1140.     }

  1141. }

  1142. 

  1143. static int mxf_write_essence_container_data(AVFormatContext *s)

  1144. {

  1145.     AVIOContext *pb = s->pb;

  1146. 

  1147.     mxf_write_metadata_key(pb, 0x012300);

  1148.     klv_encode_ber_length(pb, 72);

  1149. 

  1150.     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID

  1151.     mxf_write_uuid(pb, EssenceContainerData, 0);

  1152. 

  1153.     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID

  1154.     mxf_write_umid(s, 1);

  1155. 

  1156.     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID

  1157.     avio_wb32(pb, 1);

  1158. 

  1159.     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID

  1160.     avio_wb32(pb, 2);

  1161. 

  1162.     return 0;

  1163. }

  1164. 

  1165. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  1166. {

  1167.     mxf_write_preface(s);

  1168.     mxf_write_identification(s);

  1169.     mxf_write_content_storage(s);

  1170.     mxf_write_package(s, MaterialPackage);

  1171.     mxf_write_package(s, SourcePackage);

  1172.     mxf_write_essence_container_data(s);

  1173.     return 0;

  1174. }

  1175. 

  1176. static unsigned klv_fill_size(uint64_t size)

  1177. {

  1178.     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));

  1179.     if (pad < 20) // smallest fill item possible

  1180.         return pad + KAG_SIZE;

  1181.     else

  1182.         return pad & (KAG_SIZE-1);

  1183. }

  1184. 

  1185. static void mxf_write_index_table_segment(AVFormatContext *s)

  1186. {

  1187.     MXFContext *mxf = s->priv_data;

  1188.     AVIOContext *pb = s->pb;

  1189.     int i, j, temporal_reordering = 0;

  1190.     int key_index = mxf->last_key_index;

  1191. 

  1192.     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);

  1193. 

  1194.     if (!mxf->edit_units_count && !mxf->edit_unit_byte_count)

  1195.         return;

  1196. 

  1197.     avio_write(pb, index_table_segment_key, 16);

  1198. 

  1199.     if (mxf->edit_unit_byte_count) {

  1200.         klv_encode_ber_length(pb, 80);

  1201.     } else {

  1202.         klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1)*6 +

  1203.                               12+mxf->edit_units_count*(11+mxf->slice_count*4));

  1204.     }

  1205. 

  1206.     // instance id

  1207.     mxf_write_local_tag(pb, 16, 0x3C0A);

  1208.     mxf_write_uuid(pb, IndexTableSegment, 0);

  1209. 

  1210.     // index edit rate

  1211.     mxf_write_local_tag(pb, 8, 0x3F0B);

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

  1213.     avio_wb32(pb, mxf->time_base.num);

  1214. 

  1215.     // index start position

  1216.     mxf_write_local_tag(pb, 8, 0x3F0C);

  1217.     avio_wb64(pb, mxf->last_indexed_edit_unit);

  1218. 

  1219.     // index duration

  1220.     mxf_write_local_tag(pb, 8, 0x3F0D);

  1221.     if (mxf->edit_unit_byte_count)

  1222.         avio_wb64(pb, 0); // index table covers whole container

  1223.     else

  1224.         avio_wb64(pb, mxf->edit_units_count);

  1225. 

  1226.     // edit unit byte count

  1227.     mxf_write_local_tag(pb, 4, 0x3F05);

  1228.     avio_wb32(pb, mxf->edit_unit_byte_count);

  1229. 

  1230.     // index sid

  1231.     mxf_write_local_tag(pb, 4, 0x3F06);

  1232.     avio_wb32(pb, 2);

  1233. 

  1234.     // body sid

  1235.     mxf_write_local_tag(pb, 4, 0x3F07);

  1236.     avio_wb32(pb, 1);

  1237. 

  1238.     if (!mxf->edit_unit_byte_count) {

  1239.         // real slice count - 1

  1240.         mxf_write_local_tag(pb, 1, 0x3F08);

  1241.         avio_w8(pb, mxf->slice_count);

  1242. 

  1243.         // delta entry array

  1244.         mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);

  1245.         avio_wb32(pb, s->nb_streams+1); // num of entries

  1246.         avio_wb32(pb, 6);               // size of one entry

  1247.         // write system item delta entry

  1248.         avio_w8(pb, 0);

  1249.         avio_w8(pb, 0); // slice entry

  1250.         avio_wb32(pb, 0); // element delta

  1251.         for (i = 0; i < s->nb_streams; i++) {

  1252.             AVStream *st = s->streams[i];

  1253.             MXFStreamContext *sc = st->priv_data;

  1254.             avio_w8(pb, sc->temporal_reordering);

  1255.             if (sc->temporal_reordering)

  1256.                 temporal_reordering = 1;

  1257.             if (i == 0) { // video track

  1258.                 avio_w8(pb, 0); // slice number

  1259.                 avio_wb32(pb, KAG_SIZE); // system item size including klv fill

  1260.             } else { // audio track

  1261.                 unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;

  1262.                 audio_frame_size += klv_fill_size(audio_frame_size);

  1263.                 avio_w8(pb, 1);

  1264.                 avio_wb32(pb, (i-1)*audio_frame_size); // element delta

  1265.             }

  1266.         }

  1267. 

  1268.         mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);

  1269.         avio_wb32(pb, mxf->edit_units_count);  // num of entries

  1270.         avio_wb32(pb, 11+mxf->slice_count*4);  // size of one entry

  1271. 

  1272.         for (i = 0; i < mxf->edit_units_count; i++) {

  1273.             int temporal_offset = 0;

  1274. 

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

  1276.                 mxf->last_key_index = key_index;

  1277.                 key_index = i;

  1278.             }

  1279. 

  1280.             if (temporal_reordering) {

  1281.                 int pic_num_in_gop = i - key_index;

  1282.                 if (pic_num_in_gop != mxf->index_entries[i].temporal_ref) {

  1283.                     for (j = key_index; j < mxf->edit_units_count; j++) {

  1284.                         if (pic_num_in_gop == mxf->index_entries[j].temporal_ref)

  1285.                             break;

  1286.                     }

  1287.                     if (j == mxf->edit_units_count)

  1288.                         av_log(s, AV_LOG_WARNING, "missing frames\n");

  1289.                     temporal_offset = j - key_index - pic_num_in_gop;

  1290.                 }

  1291.             }

  1292.             avio_w8(pb, temporal_offset);

  1293. 

  1294.             if ((mxf->index_entries[i].flags & 0x30) == 0x30) { // back and forward prediction

  1295.                 avio_w8(pb, mxf->last_key_index - i);

  1296.             } else {

  1297.                 avio_w8(pb, key_index - i); // key frame offset

  1298.                 if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward

  1299.                     mxf->last_key_index = key_index;

  1300.             }

  1301. 

  1302.             if (!(mxf->index_entries[i].flags & 0x33) && // I frame

  1303.                 mxf->index_entries[i].flags & 0x40 && !temporal_offset)

  1304.                 mxf->index_entries[i].flags |= 0x80; // random access

  1305.             avio_w8(pb, mxf->index_entries[i].flags);

  1306.             // stream offset

  1307.             avio_wb64(pb, mxf->index_entries[i].offset);

  1308.             if (s->nb_streams > 1)

  1309.                 avio_wb32(pb, mxf->index_entries[i].slice_offset);

  1310.         }

  1311. 

  1312.         mxf->last_key_index = key_index - mxf->edit_units_count;

  1313.         mxf->last_indexed_edit_unit += mxf->edit_units_count;

  1314.         mxf->edit_units_count = 0;

  1315.     }

  1316. }

  1317. 

  1318. static void mxf_write_klv_fill(AVFormatContext *s)

  1319. {

  1320.     unsigned pad = klv_fill_size(avio_tell(s->pb));

  1321.     if (pad) {

  1322.         avio_write(s->pb, klv_fill_key, 16);

  1323.         pad -= 16 + 4;

  1324.         klv_encode_ber4_length(s->pb, pad);

  1325.         for (; pad; pad--)

  1326.             avio_w8(s->pb, 0);

  1327.         av_assert1(!(avio_tell(s->pb) & (KAG_SIZE-1)));

  1328.     }

  1329. }

  1330. 

  1331. static void mxf_write_partition(AVFormatContext *s, int bodysid,

  1332.                                 int indexsid,

  1333.                                 const uint8_t *key, int write_metadata)

  1334. {

  1335.     MXFContext *mxf = s->priv_data;

  1336.     AVIOContext *pb = s->pb;

  1337.     int64_t header_byte_count_offset;

  1338.     unsigned index_byte_count = 0;

  1339.     uint64_t partition_offset = avio_tell(pb);

  1340. 

  1341.     if (!mxf->edit_unit_byte_count && mxf->edit_units_count)

  1342.         index_byte_count = 85 + 12+(s->nb_streams+1)*6 +

  1343.             12+mxf->edit_units_count*(11+mxf->slice_count*4);

  1344.     else if (mxf->edit_unit_byte_count && indexsid)

  1345.         index_byte_count = 80;

  1346. 

  1347.     if (index_byte_count) {

  1348.         // add encoded ber length

  1349.         index_byte_count += 16 + klv_ber_length(index_byte_count);

  1350.         index_byte_count += klv_fill_size(index_byte_count);

  1351.     }

  1352. 

  1353.     if (!memcmp(key, body_partition_key, 16)) {

  1354.         mxf->body_partition_offset =

  1355.             av_realloc(mxf->body_partition_offset,

  1356.                        (mxf->body_partitions_count+1)*

  1357.                        sizeof(*mxf->body_partition_offset));

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

  1359.     }

  1360. 

  1361.     // write klv

  1362.     avio_write(pb, key, 16);

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

  1364. 

  1365.     // write partition value

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

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

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

  1369. 

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

  1371. 

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

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

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

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

  1376.     else

  1377.         avio_wb64(pb, 0);

  1378. 

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

  1380. 

  1381.     // set offset

  1382.     header_byte_count_offset = avio_tell(pb);

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

  1384. 

  1385.     // indexTable

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

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

  1388. 

  1389.     // BodyOffset

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

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

  1392.     } else

  1393.         avio_wb64(pb, 0);

  1394. 

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

  1396. 

  1397.     // operational pattern

  1398.     avio_write(pb, op1a_ul, 16);

  1399. 

  1400.     // essence container

  1401.     mxf_write_essence_container_refs(s);

  1402. 

  1403.     if (write_metadata) {

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

  1405.         int64_t pos, start;

  1406.         unsigned header_byte_count;

  1407. 

  1408.         mxf_write_klv_fill(s);

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

  1410.         mxf_write_primer_pack(s);

  1411.         mxf_write_header_metadata_sets(s);

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

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

  1414. 

  1415.         // update header_byte_count

  1416.         avio_seek(pb, header_byte_count_offset, SEEK_SET);

  1417.         avio_wb64(pb, header_byte_count);

  1418.         avio_seek(pb, pos, SEEK_SET);

  1419.     }

  1420. 

  1421.     avio_flush(pb);

  1422. }

  1423. 

  1424. static int mxf_parse_dnxhd_frame(AVFormatContext *s, AVStream *st,

  1425. AVPacket *pkt)

  1426. {

  1427.     MXFContext *mxf = s->priv_data;

  1428.     MXFStreamContext *sc = st->priv_data;

  1429.     int i, cid;

  1430.     uint8_t* header_cid;

  1431.     unsigned int frame_size = 0;

  1432. 

  1433.     if (mxf->header_written)

  1434.         return 1;

  1435. 

  1436.     if (pkt->size < 43)

  1437.         return -1;

  1438. 

  1439.     header_cid = pkt->data + 0x28;

  1440.     cid = header_cid[0] << 24 | header_cid[1] << 16 | header_cid[2] << 8 | header_cid[3];

  1441. 

  1442.     if ((i = ff_dnxhd_get_cid_table(cid)) < 0)

  1443.         return -1;

  1444. 

  1445.     switch (cid) {

  1446.     case 1235:

  1447.         sc->index = 24;

  1448.         sc->component_depth = 10;

  1449.         break;

  1450.     case 1237:

  1451.         sc->index = 25;

  1452.         break;

  1453.     case 1238:

  1454.         sc->index = 26;

  1455.         break;

  1456.     case 1241:

  1457.         sc->index = 27;

  1458.         sc->component_depth = 10;

  1459.         break;

  1460.     case 1242:

  1461.         sc->index = 28;

  1462.         break;

  1463.     case 1243:

  1464.         sc->index = 29;

  1465.         break;

  1466.     case 1250:

  1467.         sc->index = 30;

  1468.         sc->component_depth = 10;

  1469.         break;

  1470.     case 1251:

  1471.         sc->index = 31;

  1472.         break;

  1473.     case 1252:

  1474.         sc->index = 32;

  1475.         break;

  1476.     case 1253:

  1477.         sc->index = 33;

  1478.         break;

  1479.     default:

  1480.         return -1;

  1481.     }

  1482. 

  1483.     frame_size = ff_dnxhd_cid_table[i].frame_size;

  1484.     sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;

  1485.     sc->aspect_ratio = (AVRational){ 16, 9 };

  1486. 

  1487.     mxf->edit_unit_byte_count = KAG_SIZE;

  1488.     for (i = 0; i < s->nb_streams; i++) {

  1489.         AVStream *st = s->streams[i];

  1490.         MXFStreamContext *sc = st->priv_data;

  1491.         if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

  1492.             mxf->edit_unit_byte_count += 16 + 4 + sc->aic.samples[0]*sc->aic.sample_size;

  1493.             mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1494.         } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  1495.             mxf->edit_unit_byte_count += 16 + 4 + frame_size;

  1496.             mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1497.         }

  1498.     }

  1499. 

  1500.     return 1;

  1501. }

  1502. 

  1503. static int mxf_parse_dv_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1504. {

  1505.     MXFContext *mxf = s->priv_data;

  1506.     MXFStreamContext *sc = st->priv_data;

  1507.     uint8_t *vs_pack, *vsc_pack;

  1508.     int i, ul_index, frame_size, stype, pal;

  1509. 

  1510.     if (mxf->header_written)

  1511.         return 1;

  1512. 

  1513.     // Check for minimal frame size

  1514.     if (pkt->size < 120000)

  1515.         return -1;

  1516. 

  1517.     vs_pack  = pkt->data + 80*5 + 48;

  1518.     vsc_pack = pkt->data + 80*5 + 53;

  1519.     stype    = vs_pack[3] & 0x1f;

  1520.     pal      = (vs_pack[3] >> 5) & 0x1;

  1521. 

  1522.     if ((vs_pack[2] & 0x07) == 0x02)

  1523.         sc->aspect_ratio = (AVRational){ 16, 9 };

  1524.     else

  1525.         sc->aspect_ratio = (AVRational){ 4, 3 };

  1526. 

  1527.     sc->interlaced = (vsc_pack[3] >> 4) & 0x01;

  1528.     // TODO: fix dv encoder to set proper FF/FS value in VSC pack

  1529.     // and set field dominance accordingly

  1530.     // av_log(s, AV_LOG_DEBUG, "DV vsc pack ff/ss = %x\n", vsc_pack[2] >> 6);

  1531. 

  1532.     switch (stype) {

  1533.     case 0x18: // DV100 720p

  1534.         ul_index = 6 + pal;

  1535.         frame_size = pal ? 288000 : 240000;

  1536.         if (sc->interlaced) {

  1537.             av_log(s, AV_LOG_ERROR, "source marked as interlaced but codec profile is progressive\n");

  1538.             sc->interlaced = 0;

  1539.         }

  1540.         break;

  1541.     case 0x14: // DV100 1080i

  1542.         ul_index = 4 + pal;

  1543.         frame_size = pal ? 576000 : 480000;

  1544.         break;

  1545.     case 0x04: // DV50

  1546.         ul_index = 2 + pal;

  1547.         frame_size = pal ? 288000 : 240000;

  1548.         break;

  1549.     default: // DV25

  1550.         ul_index = 0 + pal;

  1551.         frame_size = pal ? 144000 : 120000;

  1552.     }

  1553. 

  1554.     sc->index = ul_index + 16;

  1555.     sc->codec_ul =  &mxf_essence_container_uls[sc->index].codec_ul;

  1556. 

  1557.     mxf->edit_unit_byte_count = KAG_SIZE;

  1558.     for (i = 0; i < s->nb_streams; i++) {

  1559.         AVStream *st = s->streams[i];

  1560.         MXFStreamContext *sc = st->priv_data;

  1561.         if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

  1562.             mxf->edit_unit_byte_count += 16 + 4 + sc->aic.samples[0]*sc->aic.sample_size;

  1563.             mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1564.         } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  1565.             mxf->edit_unit_byte_count += 16 + 4 + frame_size;

  1566.             mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1567.         }

  1568.     }

  1569. 

  1570.     return 1;

  1571. }

  1572. 

  1573. static const UID mxf_mpeg2_codec_uls[] = {

  1574.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame

  1575.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP

  1576.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame

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

  1578.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame

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

  1580.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame

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

  1582.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x05,0x02,0x00 }, // MP@H-14 I-Frame

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

  1584. };

  1585. 

  1586. static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)

  1587. {

  1588.     int long_gop = avctx->gop_size > 1 || avctx->has_b_frames;

  1589. 

  1590.     if (avctx->profile == 4) { // Main

  1591.         if (avctx->level == 8) // Main

  1592.             return &mxf_mpeg2_codec_uls[0+long_gop];

  1593.         else if (avctx->level == 4) // High

  1594.             return &mxf_mpeg2_codec_uls[4+long_gop];

  1595.         else if (avctx->level == 6) // High 14

  1596.             return &mxf_mpeg2_codec_uls[8+long_gop];

  1597.     } else if (avctx->profile == 0) { // 422

  1598.         if (avctx->level == 5) // Main

  1599.             return &mxf_mpeg2_codec_uls[2+long_gop];

  1600.         else if (avctx->level == 2) // High

  1601.             return &mxf_mpeg2_codec_uls[6+long_gop];

  1602.     }

  1603.     return NULL;

  1604. }

  1605. 

  1606. static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st,

  1607.                                  AVPacket *pkt, MXFIndexEntry *e)

  1608. {

  1609.     MXFStreamContext *sc = st->priv_data;

  1610.     uint32_t c = -1;

  1611.     int i;

  1612. 

  1613.     for(i = 0; i < pkt->size - 4; i++) {

  1614.         c = (c<<8) + pkt->data[i];

  1615.         if (c == 0x1b5) {

  1616.             if ((pkt->data[i+1] & 0xf0) == 0x10) { // seq ext

  1617.                 st->codec->profile = pkt->data[i+1] & 0x07;

  1618.                 st->codec->level   = pkt->data[i+2] >> 4;

  1619.             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext

  1620.                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame

  1621.                 if (sc->interlaced)

  1622.                     sc->field_dominance = 1 + !(pkt->data[i+4] & 0x80); // top field first

  1623.                 break;

  1624.             }

  1625.         } else if (c == 0x1b8) { // gop

  1626.             if (pkt->data[i+4]>>6 & 0x01) { // closed

  1627.                 sc->closed_gop = 1;

  1628.                 if (e->flags & 0x40) // sequence header present

  1629.                     e->flags |= 0x80; // random access

  1630.             }

  1631.         } else if (c == 0x1b3) { // seq

  1632.             e->flags |= 0x40;

  1633.             switch ((pkt->data[i+4]>>4) & 0xf) {

  1634.             case 2:  sc->aspect_ratio = (AVRational){  4,  3}; break;

  1635.             case 3:  sc->aspect_ratio = (AVRational){ 16,  9}; break;

  1636.             case 4:  sc->aspect_ratio = (AVRational){221,100}; break;

  1637.             default:

  1638.                 av_reduce(&sc->aspect_ratio.num, &sc->aspect_ratio.den,

  1639.                           st->codec->width, st->codec->height, 1024*1024);

  1640.             }

  1641.         } else if (c == 0x100) { // pic

  1642.             int pict_type = (pkt->data[i+2]>>3) & 0x07;

  1643.             e->temporal_ref = (pkt->data[i+1]<<2) | (pkt->data[i+2]>>6);

  1644.             if (pict_type == 2) { // P frame

  1645.                 e->flags |= 0x22;

  1646.                 sc->closed_gop = 0; // reset closed gop, don't matter anymore

  1647.             } else if (pict_type == 3) { // B frame

  1648.                 if (sc->closed_gop)

  1649.                     e->flags |= 0x13; // only backward prediction

  1650.                 else

  1651.                     e->flags |= 0x33;

  1652.                 sc->temporal_reordering = -1;

  1653.             } else if (!pict_type) {

  1654.                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");

  1655.                 return 0;

  1656.             }

  1657.         }

  1658.     }

  1659.     if (s->oformat != &ff_mxf_d10_muxer)

  1660.         sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);

  1661.     return !!sc->codec_ul;

  1662. }

  1663. 

  1664. static uint64_t mxf_parse_timestamp(time_t timestamp)

  1665. {

  1666.     struct tm *time = gmtime(&timestamp);

  1667.     if (!time)

  1668.         return 0;

  1669.     return (uint64_t)(time->tm_year+1900) << 48 |

  1670.            (uint64_t)(time->tm_mon+1)     << 40 |

  1671.            (uint64_t) time->tm_mday       << 32 |

  1672.                       time->tm_hour       << 24 |

  1673.                       time->tm_min        << 16 |

  1674.                       time->tm_sec        << 8;

  1675. }

  1676. 

  1677. static void mxf_gen_umid(AVFormatContext *s)

  1678. {

  1679.     MXFContext *mxf = s->priv_data;

  1680.     uint32_t seed = av_get_random_seed();

  1681.     uint64_t umid = seed + 0x5294713400000000LL;

  1682. 

  1683.     AV_WB64(mxf->umid  , umid);

  1684.     AV_WB64(mxf->umid+8, umid>>8);

  1685. 

  1686.     mxf->instance_number = seed;

  1687. }

  1688. 

  1689. static int mxf_write_header(AVFormatContext *s)

  1690. {

  1691.     MXFContext *mxf = s->priv_data;

  1692.     int i, ret;

  1693.     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};

  1694.     const MXFSamplesPerFrame *spf = NULL;

  1695.     AVDictionaryEntry *t;

  1696.     int64_t timestamp = 0;

  1697.     AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0);

  1698. 

  1699.     if (!s->nb_streams)

  1700.         return -1;

  1701. 

  1702.     for (i = 0; i < s->nb_streams; i++) {

  1703.         AVStream *st = s->streams[i];

  1704.         MXFStreamContext *sc = av_mallocz(sizeof(*sc));

  1705.         if (!sc)

  1706.             return AVERROR(ENOMEM);

  1707.         st->priv_data = sc;

  1708. 

  1709.         if ((i == 0) ^ (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)) {

  1710.             av_log(s, AV_LOG_ERROR, "there must be exactly one video stream and it must be the first one\n");

  1711.             return -1;

  1712.         }

  1713. 

  1714.         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

  1715.             AVRational rate, tbc = st->codec->time_base;

  1716.             // Default component depth to 8

  1717.             sc->component_depth = 8;

  1718.             mxf->timecode_base = (tbc.den + tbc.num/2) / tbc.num;

  1719.             spf = mxf_get_samples_per_frame(s, tbc);

  1720.             if (!spf) {

  1721.                 av_log(s, AV_LOG_ERROR, "Unsupported video frame rate %d/%d\n",

  1722.                        tbc.den, tbc.num);

  1723.                 return AVERROR(EINVAL);

  1724.             }

  1725.             mxf->time_base = spf->time_base;

  1726.             rate = av_inv_q(mxf->time_base);

  1727.             avpriv_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);

  1728.             if (!tcr)

  1729.                 tcr = av_dict_get(st->metadata, "timecode", NULL, 0);

  1730.             if (tcr)

  1731.                 ret = av_timecode_init_from_string(&mxf->tc, rate, tcr->value, s);

  1732.             else

  1733.                 ret = av_timecode_init(&mxf->tc, rate, 0, 0, s);

  1734.             if (ret < 0)

  1735.                 return ret;

  1736.             if (s->oformat == &ff_mxf_d10_muxer) {

  1737.                 if (st->codec->bit_rate == 50000000)

  1738.                     if (mxf->time_base.den == 25) sc->index = 3;

  1739.                     else                          sc->index = 5;

  1740.                 else if (st->codec->bit_rate == 40000000)

  1741.                     if (mxf->time_base.den == 25) sc->index = 7;

  1742.                     else                          sc->index = 9;

  1743.                 else if (st->codec->bit_rate == 30000000)

  1744.                     if (mxf->time_base.den == 25) sc->index = 11;

  1745.                     else                          sc->index = 13;

  1746.                 else {

  1747.                     av_log(s, AV_LOG_ERROR, "error MXF D-10 only support 30/40/50 mbit/s\n");

  1748.                     return -1;

  1749.                 }

  1750. 

  1751.                 mxf->edit_unit_byte_count = KAG_SIZE; // system element

  1752.                 mxf->edit_unit_byte_count += 16 + 4 + (uint64_t)st->codec->bit_rate *

  1753.                     mxf->time_base.num / (8*mxf->time_base.den);

  1754.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1755.                 mxf->edit_unit_byte_count += 16 + 4 + 4 + spf->samples_per_frame[0]*8*4;

  1756.                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);

  1757.             }

  1758.         } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

  1759.             if (st->codec->sample_rate != 48000) {

  1760.                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");

  1761.                 return -1;

  1762.             }

  1763.             avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);

  1764.             if (s->oformat == &ff_mxf_d10_muxer) {

  1765.                 if (st->index != 1) {

  1766.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support one audio track\n");

  1767.                     return -1;

  1768.                 }

  1769.                 if (st->codec->codec_id != AV_CODEC_ID_PCM_S16LE &&

  1770.                     st->codec->codec_id != AV_CODEC_ID_PCM_S24LE) {

  1771.                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support 16 or 24 bits le audio\n");

  1772.                 }

  1773.                 sc->index = ((MXFStreamContext*)s->streams[0]->priv_data)->index + 1;

  1774.             } else

  1775.             mxf->slice_count = 1;

  1776.         }

  1777. 

  1778.         if (!sc->index) {

  1779.             sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);

  1780.             if (sc->index == -1) {

  1781.                 av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "

  1782.                        "codec not currently supported in container\n", i);

  1783.                 return -1;

  1784.             }

  1785.         }

  1786. 

  1787.         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;

  1788. 

  1789.         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);

  1790.         sc->track_essence_element_key[15] = present[sc->index];

  1791.         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);

  1792. 

  1793.         if (!present[sc->index])

  1794.             mxf->essence_container_count++;

  1795.         present[sc->index]++;

  1796.     }

  1797. 

  1798.     if (s->oformat == &ff_mxf_d10_muxer) {

  1799.         mxf->essence_container_count = 1;

  1800.     }

  1801. 

  1802.     if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))

  1803.         mxf_gen_umid(s);

  1804. 

  1805.     for (i = 0; i < s->nb_streams; i++) {

  1806.         MXFStreamContext *sc = s->streams[i]->priv_data;

  1807.         // update element count

  1808.         sc->track_essence_element_key[13] = present[sc->index];

  1809.         if (!memcmp(sc->track_essence_element_key, mxf_essence_container_uls[15].element_ul, 13)) // DV

  1810.             sc->order = (0x15 << 24) | AV_RB32(sc->track_essence_element_key+13);

  1811.         else

  1812.             sc->order = AV_RB32(sc->track_essence_element_key+12);

  1813.     }

  1814. 

  1815.     if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))

  1816.         timestamp = ff_iso8601_to_unix_time(t->value);

  1817.     if (timestamp)

  1818.         mxf->timestamp = mxf_parse_timestamp(timestamp);

  1819.     mxf->duration = -1;

  1820. 

  1821.     mxf->timecode_track = av_mallocz(sizeof(*mxf->timecode_track));

  1822.     if (!mxf->timecode_track)

  1823.         return AVERROR(ENOMEM);

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

  1825.     if (!mxf->timecode_track->priv_data)

  1826.         return AVERROR(ENOMEM);

  1827.     mxf->timecode_track->index = -1;

  1828. 

  1829.     if (!spf)

  1830.         spf = mxf_get_samples_per_frame(s, (AVRational){ 1, 25 });

  1831. 

  1832.     if (ff_audio_interleave_init(s, spf->samples_per_frame, mxf->time_base) < 0)

  1833.         return -1;

  1834. 

  1835.     return 0;

  1836. }

  1837. 

  1838. static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };

  1839. 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 };

  1840. 

  1841. static void mxf_write_system_item(AVFormatContext *s)

  1842. {

  1843.     MXFContext *mxf = s->priv_data;

  1844.     AVIOContext *pb = s->pb;

  1845.     unsigned frame;

  1846.     uint32_t time_code;

  1847. 

  1848.     frame = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  1849. 

  1850.     // write system metadata pack

  1851.     avio_write(pb, system_metadata_pack_key, 16);

  1852.     klv_encode_ber4_length(pb, 57);

  1853.     avio_w8(pb, 0x5c); // UL, user date/time stamp, picture and sound item present

  1854.     avio_w8(pb, 0x04); // content package rate

  1855.     avio_w8(pb, 0x00); // content package type

  1856.     avio_wb16(pb, 0x00); // channel handle

  1857.     avio_wb16(pb, mxf->tc.start + frame); // continuity count

  1858.     if (mxf->essence_container_count > 1)

  1859.         avio_write(pb, multiple_desc_ul, 16);

  1860.     else {

  1861.         MXFStreamContext *sc = s->streams[0]->priv_data;

  1862.         avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);

  1863.     }

  1864.     avio_w8(pb, 0);

  1865.     avio_wb64(pb, 0);

  1866.     avio_wb64(pb, 0); // creation date/time stamp

  1867. 

  1868.     avio_w8(pb, 0x81); // SMPTE 12M time code

  1869.     time_code = av_timecode_get_smpte_from_framenum(&mxf->tc, frame);

  1870.     avio_wb32(pb, time_code);

  1871.     avio_wb32(pb, 0); // binary group data

  1872.     avio_wb64(pb, 0);

  1873. 

  1874.     // write system metadata package set

  1875.     avio_write(pb, system_metadata_package_set_key, 16);

  1876.     klv_encode_ber4_length(pb, 35);

  1877.     avio_w8(pb, 0x83); // UMID

  1878.     avio_wb16(pb, 0x20);

  1879.     mxf_write_umid(s, 1);

  1880. }

  1881. 

  1882. static void mxf_write_d10_video_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1883. {

  1884.     MXFContext *mxf = s->priv_data;

  1885.     AVIOContext *pb = s->pb;

  1886.     int packet_size = (uint64_t)st->codec->bit_rate*mxf->time_base.num /

  1887.         (8*mxf->time_base.den); // frame size

  1888.     int pad;

  1889. 

  1890.     packet_size += 16 + 4;

  1891.     packet_size += klv_fill_size(packet_size);

  1892. 

  1893.     klv_encode_ber4_length(pb, pkt->size);

  1894.     avio_write(pb, pkt->data, pkt->size);

  1895. 

  1896.     // ensure CBR muxing by padding to correct video frame size

  1897.     pad = packet_size - pkt->size - 16 - 4;

  1898.     if (pad > 20) {

  1899.         avio_write(s->pb, klv_fill_key, 16);

  1900.         pad -= 16 + 4;

  1901.         klv_encode_ber4_length(s->pb, pad);

  1902.         for (; pad; pad--)

  1903.             avio_w8(s->pb, 0);

  1904.         av_assert1(!(avio_tell(s->pb) & (KAG_SIZE-1)));

  1905.     } else {

  1906.         av_log(s, AV_LOG_WARNING, "cannot fill d-10 video packet\n");

  1907.         for (; pad > 0; pad--)

  1908.             avio_w8(s->pb, 0);

  1909.     }

  1910. }

  1911. 

  1912. static void mxf_write_d10_audio_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1913. {

  1914.     MXFContext *mxf = s->priv_data;

  1915.     AVIOContext *pb = s->pb;

  1916.     int frame_size = pkt->size / st->codec->block_align;

  1917.     uint8_t *samples = pkt->data;

  1918.     uint8_t *end = pkt->data + pkt->size;

  1919.     int i;

  1920. 

  1921.     klv_encode_ber4_length(pb, 4 + frame_size*4*8);

  1922. 

  1923.     avio_w8(pb, (frame_size == 1920 ? 0 : (mxf->edit_units_count-1) % 5 + 1));

  1924.     avio_wl16(pb, frame_size);

  1925.     avio_w8(pb, (1<<st->codec->channels)-1);

  1926. 

  1927.     while (samples < end) {

  1928.         for (i = 0; i < st->codec->channels; i++) {

  1929.             uint32_t sample;

  1930.             if (st->codec->codec_id == AV_CODEC_ID_PCM_S24LE) {

  1931.                 sample = AV_RL24(samples)<< 4;

  1932.                 samples += 3;

  1933.             } else {

  1934.                 sample = AV_RL16(samples)<<12;

  1935.                 samples += 2;

  1936.             }

  1937.             avio_wl32(pb, sample | i);

  1938.         }

  1939.         for (; i < 8; i++)

  1940.             avio_wl32(pb, i);

  1941.     }

  1942. }

  1943. 

  1944. static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)

  1945. {

  1946.     MXFContext *mxf = s->priv_data;

  1947.     AVIOContext *pb = s->pb;

  1948.     AVStream *st = s->streams[pkt->stream_index];

  1949.     MXFStreamContext *sc = st->priv_data;

  1950.     MXFIndexEntry ie = {0};

  1951. 

  1952.     if (!mxf->edit_unit_byte_count && !(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {

  1953.         mxf->index_entries = av_realloc(mxf->index_entries,

  1954.             (mxf->edit_units_count + EDIT_UNITS_PER_BODY)*sizeof(*mxf->index_entries));

  1955.         if (!mxf->index_entries) {

  1956.             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");

  1957.             return -1;

  1958.         }

  1959.     }

  1960. 

  1961.     if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO) {

  1962.         if (!mxf_parse_mpeg2_frame(s, st, pkt, &ie)) {

  1963.             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");

  1964.             return -1;

  1965.         }

  1966.     } else if (st->codec->codec_id == AV_CODEC_ID_DNXHD) {

  1967.         if (!mxf_parse_dnxhd_frame(s, st, pkt)) {

  1968.             av_log(s, AV_LOG_ERROR, "could not get dnxhd profile\n");

  1969.             return -1;

  1970.         }

  1971.     } else if (st->codec->codec_id == AV_CODEC_ID_DVVIDEO) {

  1972.         if (!mxf_parse_dv_frame(s, st, pkt)) {

  1973.             av_log(s, AV_LOG_ERROR, "could not get dv profile\n");

  1974.             return -1;

  1975.         }

  1976.     }

  1977. 

  1978.     if (!mxf->header_written) {

  1979.         if (mxf->edit_unit_byte_count) {

  1980.             mxf_write_partition(s, 1, 2, header_open_partition_key, 1);

  1981.             mxf_write_klv_fill(s);

  1982.             mxf_write_index_table_segment(s);

  1983.         } else {

  1984.             mxf_write_partition(s, 0, 0, header_open_partition_key, 1);

  1985.         }

  1986.         mxf->header_written = 1;

  1987.     }

  1988. 

  1989.     if (st->index == 0) {

  1990.         if (!mxf->edit_unit_byte_count &&

  1991.             (!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&

  1992.             !(ie.flags & 0x33)) { // I frame, Gop start

  1993.             mxf_write_klv_fill(s);

  1994.             mxf_write_partition(s, 1, 2, body_partition_key, 0);

  1995. 

  1996.             mxf_write_klv_fill(s);

  1997.             mxf_write_index_table_segment(s);

  1998.         }

  1999. 

  2000.         mxf_write_klv_fill(s);

  2001.         mxf_write_system_item(s);

  2002. 

  2003.         if (!mxf->edit_unit_byte_count) {

  2004.             mxf->index_entries[mxf->edit_units_count].offset = mxf->body_offset;

  2005.             mxf->index_entries[mxf->edit_units_count].flags = ie.flags;

  2006.             mxf->index_entries[mxf->edit_units_count].temporal_ref = ie.temporal_ref;

  2007.             mxf->body_offset += KAG_SIZE; // size of system element

  2008.         }

  2009.         mxf->edit_units_count++;

  2010.     } else if (!mxf->edit_unit_byte_count && st->index == 1) {

  2011.         mxf->index_entries[mxf->edit_units_count-1].slice_offset =

  2012.             mxf->body_offset - mxf->index_entries[mxf->edit_units_count-1].offset;

  2013.     }

  2014. 

  2015.     mxf_write_klv_fill(s);

  2016.     avio_write(pb, sc->track_essence_element_key, 16); // write key

  2017.     if (s->oformat == &ff_mxf_d10_muxer) {

  2018.         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)

  2019.             mxf_write_d10_video_packet(s, st, pkt);

  2020.         else

  2021.             mxf_write_d10_audio_packet(s, st, pkt);

  2022.     } else {

  2023.         klv_encode_ber4_length(pb, pkt->size); // write length

  2024.         avio_write(pb, pkt->data, pkt->size);

  2025.         mxf->body_offset += 16+4+pkt->size + klv_fill_size(16+4+pkt->size);

  2026.     }

  2027. 

  2028.     avio_flush(pb);

  2029. 

  2030.     return 0;

  2031. }

  2032. 

  2033. static void mxf_write_random_index_pack(AVFormatContext *s)

  2034. {

  2035.     MXFContext *mxf = s->priv_data;

  2036.     AVIOContext *pb = s->pb;

  2037.     uint64_t pos = avio_tell(pb);

  2038.     int i;

  2039. 

  2040.     avio_write(pb, random_index_pack_key, 16);

  2041.     klv_encode_ber_length(pb, 28 + 12*mxf->body_partitions_count);

  2042. 

  2043.     if (mxf->edit_unit_byte_count)

  2044.         avio_wb32(pb, 1); // BodySID of header partition

  2045.     else

  2046.         avio_wb32(pb, 0);

  2047.     avio_wb64(pb, 0); // offset of header partition

  2048. 

  2049.     for (i = 0; i < mxf->body_partitions_count; i++) {

  2050.         avio_wb32(pb, 1); // BodySID

  2051.         avio_wb64(pb, mxf->body_partition_offset[i]);

  2052.     }

  2053. 

  2054.     avio_wb32(pb, 0); // BodySID of footer partition

  2055.     avio_wb64(pb, mxf->footer_partition_offset);

  2056. 

  2057.     avio_wb32(pb, avio_tell(pb) - pos + 4);

  2058. }

  2059. 

  2060. static int mxf_write_footer(AVFormatContext *s)

  2061. {

  2062.     MXFContext *mxf = s->priv_data;

  2063.     AVIOContext *pb = s->pb;

  2064. 

  2065.     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  2066. 

  2067.     mxf_write_klv_fill(s);

  2068.     mxf->footer_partition_offset = avio_tell(pb);

  2069.     if (mxf->edit_unit_byte_count) { // no need to repeat index

  2070.         mxf_write_partition(s, 0, 0, footer_partition_key, 0);

  2071.     } else {

  2072.         mxf_write_partition(s, 0, 2, footer_partition_key, 0);

  2073. 

  2074.         mxf_write_klv_fill(s);

  2075.         mxf_write_index_table_segment(s);

  2076.     }

  2077. 

  2078.     mxf_write_klv_fill(s);

  2079.     mxf_write_random_index_pack(s);

  2080. 

  2081.     if (s->pb->seekable) {

  2082.         avio_seek(pb, 0, SEEK_SET);

  2083.         if (mxf->edit_unit_byte_count) {

  2084.             mxf_write_partition(s, 1, 2, header_closed_partition_key, 1);

  2085.             mxf_write_klv_fill(s);

  2086.             mxf_write_index_table_segment(s);

  2087.         } else {

  2088.             mxf_write_partition(s, 0, 0, header_closed_partition_key, 1);

  2089.         }

  2090.     }

  2091. 

  2092.     ff_audio_interleave_close(s);

  2093. 

  2094.     av_freep(&mxf->index_entries);

  2095.     av_freep(&mxf->body_partition_offset);

  2096.     av_freep(&mxf->timecode_track->priv_data);

  2097.     av_freep(&mxf->timecode_track);

  2098. 

  2099.     mxf_free(s);

  2100. 

  2101.     return 0;

  2102. }

  2103. 

  2104. static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  2105. {

  2106.     int i, stream_count = 0;

  2107. 

  2108.     for (i = 0; i < s->nb_streams; i++)

  2109.         stream_count += !!s->streams[i]->last_in_packet_buffer;

  2110. 

  2111.     if (stream_count && (s->nb_streams == stream_count || flush)) {

  2112.         AVPacketList *pktl = s->packet_buffer;

  2113.         if (s->nb_streams != stream_count) {

  2114.             AVPacketList *last = NULL;

  2115.             // find last packet in edit unit

  2116.             while (pktl) {

  2117.                 if (!stream_count || pktl->pkt.stream_index == 0)

  2118.                     break;

  2119.                 last = pktl;

  2120.                 pktl = pktl->next;

  2121.                 stream_count--;

  2122.             }

  2123.             // purge packet queue

  2124.             while (pktl) {

  2125.                 AVPacketList *next = pktl->next;

  2126. 

  2127.                 if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)

  2128.                     s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;

  2129.                 av_free_packet(&pktl->pkt);

  2130.                 av_freep(&pktl);

  2131.                 pktl = next;

  2132.             }

  2133.             if (last)

  2134.                 last->next = NULL;

  2135.             else {

  2136.                 s->packet_buffer = NULL;

  2137.                 s->packet_buffer_end= NULL;

  2138.                 goto out;

  2139.             }

  2140.             pktl = s->packet_buffer;

  2141.         }

  2142. 

  2143.         *out = pktl->pkt;

  2144.         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);

  2145.         s->packet_buffer = pktl->next;

  2146.         if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)

  2147.             s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;

  2148.         if(!s->packet_buffer)

  2149.             s->packet_buffer_end= NULL;

  2150.         av_freep(&pktl);

  2151.         return 1;

  2152.     } else {

  2153.     out:

  2154.         av_init_packet(out);

  2155.         return 0;

  2156.     }

  2157. }

  2158. 

  2159. static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)

  2160. {

  2161.     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;

  2162.     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;

  2163. 

  2164.     return next->dts > pkt->dts ||

  2165.         (next->dts == pkt->dts && sc->order < sc2->order);

  2166. }

  2167. 

  2168. static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  2169. {

  2170.     return ff_audio_rechunk_interleave(s, out, pkt, flush,

  2171.                                mxf_interleave_get_packet, mxf_compare_timestamps);

  2172. }

  2173. 

  2174. AVOutputFormat ff_mxf_muxer = {

  2175.     .name              = "mxf",

  2176.     .long_name         = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),

  2177.     .mime_type         = "application/mxf",

  2178.     .extensions        = "mxf",

  2179.     .priv_data_size    = sizeof(MXFContext),

  2180.     .audio_codec       = AV_CODEC_ID_PCM_S16LE,

  2181.     .video_codec       = AV_CODEC_ID_MPEG2VIDEO,

  2182.     .write_header      = mxf_write_header,

  2183.     .write_packet      = mxf_write_packet,

  2184.     .write_trailer     = mxf_write_footer,

  2185.     .flags             = AVFMT_NOTIMESTAMPS,

  2186.     .interleave_packet = mxf_interleave,

  2187. };

  2188. 

  2189. AVOutputFormat ff_mxf_d10_muxer = {

  2190.     .name              = "mxf_d10",

  2191.     .long_name         = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format) D-10 Mapping"),

  2192.     .mime_type         = "application/mxf",

  2193.     .priv_data_size    = sizeof(MXFContext),

  2194.     .audio_codec       = AV_CODEC_ID_PCM_S16LE,

  2195.     .video_codec       = AV_CODEC_ID_MPEG2VIDEO,

  2196.     .write_header      = mxf_write_header,

  2197.     .write_packet      = mxf_write_packet,

  2198.     .write_trailer     = mxf_write_footer,

  2199.     .flags             = AVFMT_NOTIMESTAMPS,

  2200.     .interleave_packet = mxf_interleave,

  2201. };