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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/fifo.h"

  39. #include "libavcodec/bytestream.h"

  40. #include "audiointerleave.h"

  41. #include "avformat.h"

  42. #include "mxf.h"

  43. 

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

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

  46. 

  47. #define EDIT_UNITS_PER_BODY 250

  48. #define KAG_SIZE 512

  49. 

  50. typedef struct {

  51.     int local_tag;

  52.     UID uid;

  53. } MXFLocalTagPair;

  54. 

  55. typedef struct {

  56.     uint8_t flags;

  57.     uint64_t offset;

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

  59. } MXFIndexEntry;

  60. 

  61. typedef struct {

  62.     AudioInterleaveContext aic;

  63.     UID track_essence_element_key;

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

  65.     const UID *codec_ul;

  66.     int64_t duration;

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

  68.     int interlaced;       ///< wether picture is interlaced

  69.     int temporal_reordering;

  70. } MXFStreamContext;

  71. 

  72. typedef struct {

  73.     UID container_ul;

  74.     UID element_ul;

  75.     UID codec_ul;

  76.     void (*write_desc)();

  77. } MXFContainerEssenceEntry;

  78. 

  79. static const struct {

  80.     enum CodecID id;

  81.     int index;

  82. } mxf_essence_mappings[] = {

  83.     { CODEC_ID_MPEG2VIDEO, 0 },

  84.     { CODEC_ID_PCM_S24LE,  1 },

  85.     { CODEC_ID_PCM_S16LE,  1 },

  86.     { 0 }

  87. };

  88. 

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

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

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

  92. 

  93. static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {

  94.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },

  95.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  96.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },

  97.       mxf_write_mpegvideo_desc },

  98.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },

  99.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },

  100.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  101.       mxf_write_aes3_desc },

  102.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },

  103.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },

  104.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  105.       mxf_write_wav_desc },

  106.     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  107.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  108.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  109.       NULL },

  110. };

  111. 

  112. typedef struct MXFContext {

  113.     int64_t footer_partition_offset;

  114.     int essence_container_count;

  115.     uint8_t essence_containers_indices[FF_ARRAY_ELEMS(mxf_essence_container_uls)];

  116.     AVRational time_base;

  117.     int header_written;

  118.     MXFIndexEntry *index_entries;

  119.     unsigned edit_units_count;

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

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

  122.     int last_indexed_edit_unit;

  123.     uint64_t first_edit_unit_offset;

  124.     uint64_t *body_partition_offset;

  125.     unsigned body_partitions_count;

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

  127.     uint64_t body_offset;

  128. } MXFContext;

  129. 

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

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

  132. 

  133. /**

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

  135.  */

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

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

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

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

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

  141. 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

  142. 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

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

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

  145. 

  146. /**

  147.  * partial key for header metadata

  148.  */

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

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

  151. 

  152. /**

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

  154.  */

  155. static const MXFLocalTagPair mxf_local_tag_batch[] = {

  156.     // preface set

  157.     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */

  158.     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */

  159.     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */

  160.     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */

  161.     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */

  162.     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */

  163.     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */

  164.     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */

  165.     // Identification

  166.     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */

  167.     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */

  168.     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */

  169.     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */

  170.     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */

  171.     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */

  172.     // Content Storage

  173.     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */

  174.     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */

  175.     // Essence Container Data

  176.     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */

  177.     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */

  178.     // Package

  179.     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */

  180.     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */

  181.     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */

  182.     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */

  183.     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */

  184.     // Track

  185.     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */

  186.     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */

  187.     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */

  188.     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */

  189.     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */

  190.     // Sequence

  191.     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */

  192.     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */

  193.     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */

  194.     // Source Clip

  195.     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */

  196.     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */

  197.     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */

  198.     // File Descriptor

  199.     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */

  200.     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */

  201.     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */

  202.     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */

  203.     // Generic Picture Essence Descriptor

  204.     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */

  205.     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */

  206.     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */

  207.     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */

  208.     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */

  209.     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */

  210.     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */

  211.     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */

  212.     // CDCI Picture Essence Descriptor

  213.     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */

  214.     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */

  215.     // Generic Sound Essence Descriptor

  216.     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */

  217.     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */

  218.     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */

  219.     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */

  220.     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */

  221.     // Index Table Segment

  222.     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */

  223.     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */

  224.     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */

  225.     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */

  226.     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */

  227.     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */

  228.     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */

  229.     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */

  230.     // MPEG video Descriptor

  231.     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */

  232.     // Wave Audio Essence Descriptor

  233.     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */

  234.     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */

  235. };

  236. 

  237. static void mxf_write_uuid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)

  238. {

  239.     put_buffer(pb, uuid_base, 12);

  240.     put_be16(pb, type);

  241.     put_be16(pb, value);

  242. }

  243. 

  244. static void mxf_write_umid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)

  245. {

  246.     put_buffer(pb, umid_base, 16);

  247.     mxf_write_uuid(pb, type, value);

  248. }

  249. 

  250. static void mxf_write_refs_count(ByteIOContext *pb, int ref_count)

  251. {

  252.     put_be32(pb, ref_count);

  253.     put_be32(pb, 16);

  254. }

  255. 

  256. static int klv_ber_length(uint64_t len)

  257. {

  258.     if (len < 128)

  259.         return 1;

  260.     else

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

  262. }

  263. 

  264. static int klv_encode_ber_length(ByteIOContext *pb, uint64_t len)

  265. {

  266.     // Determine the best BER size

  267.     int size;

  268.     if (len < 128) {

  269.         //short form

  270.         put_byte(pb, len);

  271.         return 1;

  272.     }

  273. 

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

  275. 

  276.     // long form

  277.     put_byte(pb, 0x80 + size);

  278.     while(size) {

  279.         size--;

  280.         put_byte(pb, len >> 8 * size & 0xff);

  281.     }

  282.     return 0;

  283. }

  284. 

  285. /*

  286.  * Get essence container ul index

  287.  */

  288. static int mxf_get_essence_container_ul_index(enum CodecID id)

  289. {

  290.     int i;

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

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

  293.             return mxf_essence_mappings[i].index;

  294.     return -1;

  295. }

  296. 

  297. static void mxf_write_primer_pack(AVFormatContext *s)

  298. {

  299.     ByteIOContext *pb = s->pb;

  300.     int local_tag_number, i = 0;

  301. 

  302.     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);

  303. 

  304.     put_buffer(pb, primer_pack_key, 16);

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

  306. 

  307.     put_be32(pb, local_tag_number); // local_tag num

  308.     put_be32(pb, 18); // item size, always 18 according to the specs

  309. 

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

  311.         put_be16(pb, mxf_local_tag_batch[i].local_tag);

  312.         put_buffer(pb, mxf_local_tag_batch[i].uid, 16);

  313.     }

  314. }

  315. 

  316. static void mxf_write_local_tag(ByteIOContext *pb, int size, int tag)

  317. {

  318.     put_be16(pb, tag);

  319.     put_be16(pb, size);

  320. }

  321. 

  322. static void mxf_write_metadata_key(ByteIOContext *pb, unsigned int value)

  323. {

  324.     put_buffer(pb, header_metadata_key, 13);

  325.     put_be24(pb, value);

  326. }

  327. 

  328. static void mxf_free(AVFormatContext *s)

  329. {

  330.     int i;

  331. 

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

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

  334.         av_freep(&st->priv_data);

  335.     }

  336. }

  337. 

  338. static const MXFCodecUL *mxf_get_data_definition_ul(int type)

  339. {

  340.     const MXFCodecUL *uls = ff_mxf_data_definition_uls;

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

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

  343.             break;

  344.         uls++;

  345.     }

  346.     return uls;

  347. }

  348. 

  349. static void mxf_write_essence_container_refs(AVFormatContext *s)

  350. {

  351.     MXFContext *c = s->priv_data;

  352.     ByteIOContext *pb = s->pb;

  353.     int i;

  354. 

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

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

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

  358.         put_buffer(pb, mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul, 16);

  359.         PRINT_KEY(s, "essence container ul:\n", mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul);

  360.     }

  361. }

  362. 

  363. static void mxf_write_preface(AVFormatContext *s)

  364. {

  365.     MXFContext *mxf = s->priv_data;

  366.     ByteIOContext *pb = s->pb;

  367. 

  368.     mxf_write_metadata_key(pb, 0x012f00);

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

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

  371. 

  372.     // write preface set uid

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

  374.     mxf_write_uuid(pb, Preface, 0);

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

  376. 

  377.     // last modified date

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

  379.     put_be64(pb, mxf->timestamp);

  380. 

  381.     // write version

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

  383.     put_be16(pb, 1);

  384. 

  385.     // write identification_refs

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

  387.     mxf_write_refs_count(pb, 1);

  388.     mxf_write_uuid(pb, Identification, 0);

  389. 

  390.     // write content_storage_refs

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

  392.     mxf_write_uuid(pb, ContentStorage, 0);

  393. 

  394.     // operational pattern

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

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

  397.         put_buffer(pb, op1a_ul, 14);

  398.         put_be16(pb, 0x0900); // multi track

  399.     } else {

  400.         put_buffer(pb, op1a_ul, 16);

  401.     }

  402. 

  403.     // write essence_container_refs

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

  405.     mxf_write_essence_container_refs(s);

  406. 

  407.     // write dm_scheme_refs

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

  409.     put_be64(pb, 0);

  410. }

  411. 

  412. /*

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

  414.  */

  415. static void mxf_write_local_tag_utf16(ByteIOContext *pb, int tag, const char *value)

  416. {

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

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

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

  420.         put_be16(pb, value[i]);

  421. }

  422. 

  423. static void mxf_write_identification(AVFormatContext *s)

  424. {

  425.     MXFContext *mxf = s->priv_data;

  426.     ByteIOContext *pb = s->pb;

  427.     const char *company = "FFmpeg";

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

  429.     const char *version;

  430.     int length;

  431. 

  432.     mxf_write_metadata_key(pb, 0x013000);

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

  434. 

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

  436.         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);

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

  438.     klv_encode_ber_length(pb, length);

  439. 

  440.     // write uid

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

  442.     mxf_write_uuid(pb, Identification, 0);

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

  444. 

  445.     // write generation uid

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

  447.     mxf_write_uuid(pb, Identification, 1);

  448. 

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

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

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

  452. 

  453.     // write product uid

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

  455.     mxf_write_uuid(pb, Identification, 2);

  456. 

  457.     // modification date

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

  459.     put_be64(pb, mxf->timestamp);

  460. }

  461. 

  462. static void mxf_write_content_storage(AVFormatContext *s)

  463. {

  464.     ByteIOContext *pb = s->pb;

  465. 

  466.     mxf_write_metadata_key(pb, 0x011800);

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

  468.     klv_encode_ber_length(pb, 92);

  469. 

  470.     // write uid

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

  472.     mxf_write_uuid(pb, ContentStorage, 0);

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

  474. 

  475.     // write package reference

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

  477.     mxf_write_refs_count(pb, 2);

  478.     mxf_write_uuid(pb, MaterialPackage, 0);

  479.     mxf_write_uuid(pb, SourcePackage, 0);

  480. 

  481.     // write essence container data

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

  483.     mxf_write_refs_count(pb, 1);

  484.     mxf_write_uuid(pb, EssenceContainerData, 0);

  485. }

  486. 

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

  488. {

  489.     MXFContext *mxf = s->priv_data;

  490.     ByteIOContext *pb = s->pb;

  491.     MXFStreamContext *sc = st->priv_data;

  492. 

  493.     mxf_write_metadata_key(pb, 0x013b00);

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

  495.     klv_encode_ber_length(pb, 80);

  496. 

  497.     // write track uid

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

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

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

  501. 

  502.     // write track id

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

  504.     put_be32(pb, st->index);

  505. 

  506.     // write track number

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

  508.     if (type == MaterialPackage)

  509.         put_be32(pb, 0); // track number of material package is 0

  510.     else

  511.         put_buffer(pb, sc->track_essence_element_key + 12, 4);

  512. 

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

  514.     put_be32(pb, mxf->time_base.den);

  515.     put_be32(pb, mxf->time_base.num);

  516. 

  517.     // write origin

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

  519.     put_be64(pb, 0);

  520. 

  521.     // write sequence refs

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

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

  524. }

  525. 

  526. static void mxf_write_common_fields(ByteIOContext *pb, AVStream *st)

  527. {

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

  529.     MXFStreamContext *sc = st->priv_data;

  530. 

  531.     // find data define uls

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

  533.     put_buffer(pb, data_def_ul->uid, 16);

  534. 

  535.     // write duration

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

  537.     put_be64(pb, sc->duration);

  538. }

  539. 

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

  541. {

  542.     ByteIOContext *pb = s->pb;

  543. 

  544.     mxf_write_metadata_key(pb, 0x010f00);

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

  546.     klv_encode_ber_length(pb, 80);

  547. 

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

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

  550. 

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

  552.     mxf_write_common_fields(pb, st);

  553. 

  554.     // write structural component

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

  556.     mxf_write_refs_count(pb, 1);

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

  558. }

  559. 

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

  561. {

  562.     ByteIOContext *pb = s->pb;

  563.     int i;

  564. 

  565.     mxf_write_metadata_key(pb, 0x011100);

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

  567.     klv_encode_ber_length(pb, 108);

  568. 

  569.     // write uid

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

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

  572. 

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

  574.     mxf_write_common_fields(pb, st);

  575. 

  576.     // write start_position

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

  578.     put_be64(pb, 0);

  579. 

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

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

  582.     if (type == SourcePackage) {

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

  584.             put_be64(pb, 0);

  585.     } else

  586.         mxf_write_umid(pb, SourcePackage, 0);

  587. 

  588.     // write source track id

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

  590.     if (type == SourcePackage)

  591.         put_be32(pb, 0);

  592.     else

  593.         put_be32(pb, st->index);

  594. }

  595. 

  596. static void mxf_write_multi_descriptor(AVFormatContext *s)

  597. {

  598.     MXFContext *mxf = s->priv_data;

  599.     ByteIOContext *pb = s->pb;

  600.     int i;

  601. 

  602.     mxf_write_metadata_key(pb, 0x014400);

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

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

  605. 

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

  607.     mxf_write_uuid(pb, MultipleDescriptor, 0);

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

  609. 

  610.     // write sample rate

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

  612.     put_be32(pb, mxf->time_base.den);

  613.     put_be32(pb, mxf->time_base.num);

  614. 

  615.     // write essence container ul

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

  617.     put_buffer(pb, multiple_desc_ul, 16);

  618. 

  619.     // write sub descriptor refs

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

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

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

  623.         mxf_write_uuid(pb, SubDescriptor, i);

  624. }

  625. 

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

  627. {

  628.     MXFContext *mxf = s->priv_data;

  629.     MXFStreamContext *sc = st->priv_data;

  630.     ByteIOContext *pb = s->pb;

  631. 

  632.     put_buffer(pb, key, 16);

  633.     klv_encode_ber_length(pb, size);

  634. 

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

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

  637. 

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

  639.     put_be32(pb, st->index);

  640. 

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

  642.     put_be32(pb, mxf->time_base.den);

  643.     put_be32(pb, mxf->time_base.num);

  644. 

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

  646.     put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);

  647. }

  648. 

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

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

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

  652. 

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

  654. {

  655.     MXFStreamContext *sc = st->priv_data;

  656.     ByteIOContext *pb = s->pb;

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

  658.     AVRational dar;

  659.     int f1, f2;

  660. 

  661.     mxf_write_generic_desc(s, st, mxf_mpegvideo_descriptor_key, 169+sc->interlaced*4);

  662. 

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

  664.     put_be32(pb, st->codec->width);

  665. 

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

  667.     put_be32(pb, stored_height>>sc->interlaced);

  668. 

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

  670.     put_be32(pb, st->codec->width);

  671. 

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

  673.     put_be32(pb, st->codec->height>>sc->interlaced);

  674. 

  675.     // component depth

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

  677.     put_be32(pb, 8);

  678. 

  679.     // horizontal subsampling

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

  681.     put_be32(pb, 2);

  682. 

  683.     // bit rate

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

  685.     put_be32(pb, st->codec->bit_rate);

  686. 

  687.     // frame layout

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

  689.     put_byte(pb, sc->interlaced);

  690. 

  691.     // video line map

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

  693.     case  576: f1 = 23; f2 = 336; break;

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

  695.     case  480: f1 = 20; f2 = 283; break;

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

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

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

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

  700.     }

  701. 

  702.     if (!sc->interlaced) {

  703.         f2  = 0;

  704.         f1 *= 2;

  705.     }

  706. 

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

  708.     put_be32(pb, sc->interlaced ? 2 : 1);

  709.     put_be32(pb, 4);

  710.     put_be32(pb, f1);

  711.     if (sc->interlaced)

  712.         put_be32(pb, f2);

  713. 

  714.     av_reduce(&dar.num, &dar.den,

  715.               st->codec->width*st->codec->sample_aspect_ratio.num,

  716.               st->codec->height*st->codec->sample_aspect_ratio.den,

  717.               1024*1024);

  718. 

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

  720.     put_be32(pb, dar.num);

  721.     put_be32(pb, dar.den);

  722. 

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

  724.     put_buffer(pb, *sc->codec_ul, 16);

  725. }

  726. 

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

  728. {

  729.     ByteIOContext *pb = s->pb;

  730. 

  731.     mxf_write_generic_desc(s, st, key, size);

  732. 

  733.     // audio locked

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

  735.     put_byte(pb, 1);

  736. 

  737.     // write audio sampling rate

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

  739.     put_be32(pb, st->codec->sample_rate);

  740.     put_be32(pb, 1);

  741. 

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

  743.     put_be32(pb, st->codec->channels);

  744. 

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

  746.     put_be32(pb, av_get_bits_per_sample(st->codec->codec_id));

  747. }

  748. 

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

  750. {

  751.     ByteIOContext *pb = s->pb;

  752. 

  753.     mxf_write_generic_sound_desc(s, st, key, size);

  754. 

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

  756.     put_be16(pb, st->codec->block_align);

  757. 

  758.     // avg bytes per sec

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

  760.     put_be32(pb, st->codec->block_align*st->codec->sample_rate);

  761. }

  762. 

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

  764. {

  765.     mxf_write_wav_common_desc(s, st, mxf_wav_descriptor_key, 107);

  766. }

  767. 

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

  769. {

  770.     mxf_write_wav_common_desc(s, st, mxf_aes3_descriptor_key, 107);

  771. }

  772. 

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

  774. {

  775.     MXFContext *mxf = s->priv_data;

  776.     ByteIOContext *pb = s->pb;

  777.     int i;

  778. 

  779.     if (type == MaterialPackage) {

  780.         mxf_write_metadata_key(pb, 0x013600);

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

  782.         klv_encode_ber_length(pb, 92 + 16 * s->nb_streams);

  783.     } else {

  784.         mxf_write_metadata_key(pb, 0x013700);

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

  786.         klv_encode_ber_length(pb, 112 + 16 * s->nb_streams); // 20 bytes length for descriptor reference

  787.     }

  788. 

  789.     // write uid

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

  791.     mxf_write_uuid(pb, type, 0);

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

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

  794. 

  795.     // write package umid

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

  797.     mxf_write_umid(pb, type, 0);

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

  799. 

  800.     // package creation date

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

  802.     put_be64(pb, mxf->timestamp);

  803. 

  804.     // package modified date

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

  806.     put_be64(pb, mxf->timestamp);

  807. 

  808.     // write track refs

  809.     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x4403);

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

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

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

  813. 

  814.     // write multiple descriptor reference

  815.     if (type == SourcePackage) {

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

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

  818.             mxf_write_uuid(pb, MultipleDescriptor, 0);

  819.             mxf_write_multi_descriptor(s);

  820.         } else

  821.             mxf_write_uuid(pb, SubDescriptor, 0);

  822.     }

  823. 

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

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

  826.         mxf_write_track(s, st, type);

  827.         mxf_write_sequence(s, st, type);

  828.         mxf_write_structural_component(s, st, type);

  829. 

  830.         if (type == SourcePackage) {

  831.             MXFStreamContext *sc = st->priv_data;

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

  833.         }

  834.     }

  835. }

  836. 

  837. static int mxf_write_essence_container_data(AVFormatContext *s)

  838. {

  839.     ByteIOContext *pb = s->pb;

  840. 

  841.     mxf_write_metadata_key(pb, 0x012300);

  842.     klv_encode_ber_length(pb, 72);

  843. 

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

  845.     mxf_write_uuid(pb, EssenceContainerData, 0);

  846. 

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

  848.     mxf_write_umid(pb, SourcePackage, 0);

  849. 

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

  851.     put_be32(pb, 1);

  852. 

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

  854.     put_be32(pb, 2);

  855. 

  856.     return 0;

  857. }

  858. 

  859. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  860. {

  861.     mxf_write_preface(s);

  862.     mxf_write_identification(s);

  863.     mxf_write_content_storage(s);

  864.     mxf_write_package(s, MaterialPackage);

  865.     mxf_write_package(s, SourcePackage);

  866.     mxf_write_essence_container_data(s);

  867.     return 0;

  868. }

  869. 

  870. static unsigned klv_fill_size(uint64_t size)

  871. {

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

  873.     if (pad < 17) // smallest fill item possible

  874.         return pad + KAG_SIZE;

  875.     else

  876.         return pad & (KAG_SIZE-1);

  877. }

  878. 

  879. static void mxf_write_index_table_segment(AVFormatContext *s)

  880. {

  881.     MXFContext *mxf = s->priv_data;

  882.     ByteIOContext *pb = s->pb;

  883.     int i, j;

  884.     int temporal_reordering = 0;

  885.     int key_index = 0;

  886. 

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

  888. 

  889.     if (!mxf->edit_units_count)

  890.         return;

  891. 

  892.     put_buffer(pb, index_table_segment_key, 16);

  893.     klv_encode_ber_length(pb, 109 + (s->nb_streams+1)*6 +

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

  895. 

  896.     // instance id

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

  898.     mxf_write_uuid(pb, IndexTableSegment, 0);

  899. 

  900.     // index edit rate

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

  902.     put_be32(pb, mxf->time_base.num);

  903.     put_be32(pb, mxf->time_base.den);

  904. 

  905.     // index start position

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

  907.     put_be64(pb, mxf->last_indexed_edit_unit);

  908. 

  909.     // index duration

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

  911.     put_be64(pb, mxf->edit_units_count);

  912. 

  913.     // edit unit byte count

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

  915.     put_be32(pb, 0);

  916. 

  917.     // index sid

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

  919.     put_be32(pb, 2);

  920. 

  921.     // body sid

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

  923.     put_be32(pb, 1);

  924. 

  925.     // real slice count - 1

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

  927.     put_byte(pb, mxf->slice_count);

  928. 

  929.     // delta entry array

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

  931.     put_be32(pb, s->nb_streams+1); // num of entries

  932.     put_be32(pb, 6);             // size of one entry

  933.     // write system item delta entry

  934.     put_byte(pb, 0);

  935.     put_byte(pb, 0); // slice entry

  936.     put_be32(pb, 0); // element delta

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

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

  939.         MXFStreamContext *sc = st->priv_data;

  940.         put_byte(pb, sc->temporal_reordering);

  941.         if (sc->temporal_reordering)

  942.             temporal_reordering = 1;

  943.         // slice number

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

  945.             put_byte(pb, 0); // slice number

  946.             put_be32(pb, KAG_SIZE); // system item size including klv fill

  947.         } else { // audio track

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

  949.             audio_frame_size += klv_fill_size(audio_frame_size);

  950.             put_byte(pb, 1);

  951.             put_be32(pb, (i-1)*audio_frame_size); // element delta

  952.         }

  953.     }

  954. 

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

  956.     put_be32(pb, mxf->edit_units_count);  // num of entries

  957.     put_be32(pb, 11+mxf->slice_count*4);  // size of one entry

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

  959.         if (temporal_reordering) {

  960.             int temporal_offset = 0;

  961.             for (j = i+1; j < mxf->edit_units_count; j++) {

  962.                 temporal_offset++;

  963.                 if (mxf->index_entries[j].flags & 0x10) { // backward prediction

  964.                     // next is not b, so is reordered

  965.                     if (!(mxf->index_entries[i+1].flags & 0x10)) {

  966.                         if ((mxf->index_entries[i].flags & 0x11) == 0) // i frame

  967.                             temporal_offset = 0;

  968.                         else

  969.                             temporal_offset = -temporal_offset;

  970.                     }

  971.                     break;

  972.                 }

  973.             }

  974.             put_byte(pb, temporal_offset);

  975.         } else

  976.             put_byte(pb, 0);

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

  978.             mxf->last_key_index = key_index;

  979.             key_index = i;

  980.         }

  981.         if (mxf->index_entries[i].flags & 0x10 && // backward prediction

  982.             !(mxf->index_entries[key_index].flags & 0x80)) { // open gop

  983.             put_byte(pb, mxf->last_key_index - i);

  984.         } else {

  985.             put_byte(pb, key_index - i); // key frame offset

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

  987.                 mxf->last_key_index = key_index;

  988.         }

  989.         put_byte(pb, mxf->index_entries[i].flags);

  990.         // stream offset

  991.         put_be64(pb, mxf->index_entries[i].offset - mxf->first_edit_unit_offset);

  992.         if (s->nb_streams > 1)

  993.             put_be32(pb, mxf->index_entries[i].slice_offset);

  994.     }

  995. 

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

  997.     mxf->edit_units_count = 0;

  998. }

  999. 

  1000. static void mxf_write_klv_fill(AVFormatContext *s)

  1001. {

  1002.     unsigned pad = klv_fill_size(url_ftell(s->pb));

  1003.     if (pad) {

  1004.         put_buffer(s->pb, klv_fill_key, 16);

  1005.         pad -= 16;

  1006.         pad -= klv_ber_length(pad);

  1007.         klv_encode_ber_length(s->pb, pad);

  1008.         for (; pad > 7; pad -= 8)

  1009.             put_be64(s->pb, 0);

  1010.         for (; pad; pad--)

  1011.             put_byte(s->pb, 0);

  1012.         assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));

  1013.     }

  1014. }

  1015. 

  1016. static void mxf_write_partition(AVFormatContext *s, int bodysid,

  1017.                                 int indexsid,

  1018.                                 const uint8_t *key, int write_metadata)

  1019. {

  1020.     MXFContext *mxf = s->priv_data;

  1021.     ByteIOContext *pb = s->pb;

  1022.     int64_t header_byte_count_offset;

  1023.     unsigned index_byte_count = 0;

  1024.     uint64_t partition_offset = url_ftell(pb);

  1025. 

  1026.     if (mxf->edit_units_count) {

  1027.         index_byte_count = 109 + (s->nb_streams+1)*6 +

  1028.             mxf->edit_units_count*(11+mxf->slice_count*4);

  1029.         // add encoded ber length

  1030.         index_byte_count += 16 + klv_ber_length(index_byte_count);

  1031.         index_byte_count += klv_fill_size(index_byte_count);

  1032. 

  1033.         mxf->body_offset += url_ftell(pb) - mxf->index_entries[0].offset;

  1034.     }

  1035. 

  1036.     if (!memcmp(key, body_partition_key, 16)) {

  1037.         mxf->body_partition_offset =

  1038.             av_realloc(mxf->body_partition_offset,

  1039.                        (mxf->body_partitions_count+1)*

  1040.                        sizeof(*mxf->body_partition_offset));

  1041.         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;

  1042.     }

  1043. 

  1044.     // write klv

  1045.     put_buffer(pb, key, 16);

  1046. 

  1047.     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);

  1048. 

  1049.     // write partition value

  1050.     put_be16(pb, 1); // majorVersion

  1051.     put_be16(pb, 2); // minorVersion

  1052.     put_be32(pb, KAG_SIZE); // KAGSize

  1053. 

  1054.     put_be64(pb, partition_offset); // ThisPartition

  1055. 

  1056.     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)

  1057.         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition

  1058.     else if (!memcmp(key, footer_partition_key, 16))

  1059.         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition

  1060.     else

  1061.         put_be64(pb, 0);

  1062. 

  1063.     put_be64(pb, mxf->footer_partition_offset); // footerPartition

  1064. 

  1065.     // set offset

  1066.     header_byte_count_offset = url_ftell(pb);

  1067.     put_be64(pb, 0); // headerByteCount, update later

  1068. 

  1069.     // indexTable

  1070.     put_be64(pb, index_byte_count); // indexByteCount

  1071.     put_be32(pb, index_byte_count ? indexsid : 0); // indexSID

  1072. 

  1073.     // BodyOffset

  1074.     if (bodysid) put_be64(pb, mxf->body_offset);

  1075.     else         put_be64(pb, 0);

  1076. 

  1077.     put_be32(pb, bodysid); // bodySID

  1078. 

  1079.     // operational pattern

  1080.     if (s->nb_streams > 1) {

  1081.         put_buffer(pb, op1a_ul, 14);

  1082.         put_be16(pb, 0x0900); // multi track

  1083.     } else {

  1084.         put_buffer(pb, op1a_ul, 16);

  1085.     }

  1086. 

  1087.     // essence container

  1088.     mxf_write_essence_container_refs(s);

  1089. 

  1090.     if (write_metadata) {

  1091.         // mark the start of the headermetadata and calculate metadata size

  1092.         int64_t pos, start;

  1093.         unsigned header_byte_count;

  1094. 

  1095.         mxf_write_klv_fill(s);

  1096.         start = url_ftell(s->pb);

  1097.         mxf_write_primer_pack(s);

  1098.         mxf_write_header_metadata_sets(s);

  1099.         pos = url_ftell(s->pb);

  1100.         header_byte_count = pos - start + klv_fill_size(pos);

  1101. 

  1102.         // update header_byte_count

  1103.         url_fseek(pb, header_byte_count_offset, SEEK_SET);

  1104.         put_be64(pb, header_byte_count);

  1105.         url_fseek(pb, pos, SEEK_SET);

  1106.     }

  1107. 

  1108.     put_flush_packet(pb);

  1109. }

  1110. 

  1111. static const UID mxf_mpeg2_codec_uls[] = {

  1112.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame

  1113.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP

  1114.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame

  1115.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP

  1116.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame

  1117.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP

  1118.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame

  1119.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP

  1120. };

  1121. 

  1122. static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)

  1123. {

  1124.     if (avctx->profile == 4) { // Main

  1125.         if (avctx->level == 8) // Main

  1126.             return avctx->gop_size ?

  1127.                 &mxf_mpeg2_codec_uls[1] :

  1128.                 &mxf_mpeg2_codec_uls[0];

  1129.         else if (avctx->level == 4) // High

  1130.             return avctx->gop_size ?

  1131.                 &mxf_mpeg2_codec_uls[5] :

  1132.                 &mxf_mpeg2_codec_uls[4];

  1133.     } else if (avctx->profile == 0) { // 422

  1134.         if (avctx->level == 5) // Main

  1135.             return avctx->gop_size ?

  1136.                 &mxf_mpeg2_codec_uls[3] :

  1137.                 &mxf_mpeg2_codec_uls[2];

  1138.         else if (avctx->level == 2) // High

  1139.             return avctx->gop_size ?

  1140.                 &mxf_mpeg2_codec_uls[7] :

  1141.                 &mxf_mpeg2_codec_uls[6];

  1142.     }

  1143.     return NULL;

  1144. }

  1145. 

  1146. static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt, int *flags)

  1147. {

  1148.     MXFStreamContext *sc = st->priv_data;

  1149.     uint32_t c = -1;

  1150.     int i;

  1151. 

  1152.     *flags = 0;

  1153. 

  1154.     for(i = 0; i < pkt->size - 4; i++) {

  1155.         c = (c<<8) + pkt->data[i];

  1156.         if (c == 0x1B5) {

  1157.             if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext

  1158.                 st->codec->profile = pkt->data[i+1] & 0x07;

  1159.                 st->codec->level   = pkt->data[i+2] >> 4;

  1160.             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext

  1161.                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame

  1162.                 break;

  1163.             }

  1164.         } else if (c == 0x1b8) { // gop

  1165.             if (i + 4 < pkt->size && pkt->data[i+4]>>6 & 0x01) // closed

  1166.                 *flags |= 0x80; // random access

  1167.         } else if (c == 0x1b3) { // seq

  1168.             *flags |= 0x40;

  1169.         } else if (c == 0x100) { // pic

  1170.             int pict_type = (pkt->data[i+2]>>3) & 0x07;

  1171.             if (pict_type == 2) { // P frame

  1172.                 *flags |= 0x22;

  1173.                 st->codec->gop_size = 1;

  1174.             } else if (pict_type == 3) { // B frame

  1175.                 *flags |= 0x33;

  1176.                 sc->temporal_reordering = -1;

  1177.             } else if (!pict_type) {

  1178.                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");

  1179.                 return 0;

  1180.             }

  1181.         }

  1182.     }

  1183.     sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);

  1184.     return !!sc->codec_ul;

  1185. }

  1186. 

  1187. static uint64_t mxf_parse_timestamp(time_t timestamp)

  1188. {

  1189.     struct tm *time = localtime(&timestamp);

  1190.     return (uint64_t)(time->tm_year+1900) << 48 |

  1191.            (uint64_t)(time->tm_mon+1)     << 40 |

  1192.            (uint64_t) time->tm_mday       << 32 |

  1193.                       time->tm_hour       << 24 |

  1194.                       time->tm_min        << 16 |

  1195.                       time->tm_sec        << 8;

  1196. }

  1197. 

  1198. static int mxf_write_header(AVFormatContext *s)

  1199. {

  1200.     MXFContext *mxf = s->priv_data;

  1201.     int i;

  1202.     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};

  1203.     const int *samples_per_frame = NULL;

  1204. 

  1205.     for (i = 0; i < s->nb_streams; i++) {

  1206.         AVStream *st = s->streams[i];

  1207.         MXFStreamContext *sc = av_mallocz(sizeof(*sc));

  1208.         if (!sc)

  1209.             return AVERROR(ENOMEM);

  1210.         st->priv_data = sc;

  1211. 

  1212.         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {

  1213.             if (i != 0) {

  1214.                 av_log(s, AV_LOG_ERROR, "video stream must be first track\n");

  1215.                 return -1;

  1216.             }

  1217.             if (fabs(av_q2d(st->codec->time_base) - 1/25.0) < 0.0001) {

  1218.                 samples_per_frame = PAL_samples_per_frame;

  1219.                 mxf->time_base = (AVRational){ 1, 25 };

  1220.             } else if (fabs(av_q2d(st->codec->time_base) - 1001/30000.0) < 0.0001) {

  1221.                 samples_per_frame = NTSC_samples_per_frame;

  1222.                 mxf->time_base = (AVRational){ 1001, 30000 };

  1223.             } else {

  1224.                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");

  1225.                 return -1;

  1226.             }

  1227.             av_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);

  1228.         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {

  1229.             if (st->codec->sample_rate != 48000) {

  1230.                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");

  1231.                 return -1;

  1232.             }

  1233.             av_set_pts_info(st, 64, 1, st->codec->sample_rate);

  1234.             mxf->slice_count = 1;

  1235.         }

  1236.         sc->duration = -1;

  1237. 

  1238.         sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);

  1239.         if (sc->index == -1) {

  1240.             av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "

  1241.                    "codec not currently supported in container\n", i);

  1242.             return -1;

  1243.         }

  1244. 

  1245.         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;

  1246. 

  1247.         if (!present[sc->index]) {

  1248.             mxf->essence_containers_indices[mxf->essence_container_count++] = sc->index;

  1249.             present[sc->index] = 1;

  1250.         } else

  1251.             present[sc->index]++;

  1252.         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);

  1253.         sc->track_essence_element_key[15] = present[sc->index];

  1254.         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);

  1255.     }

  1256. 

  1257.     for (i = 0; i < s->nb_streams; i++) {

  1258.         MXFStreamContext *sc = s->streams[i]->priv_data;

  1259.         // update element count

  1260.         sc->track_essence_element_key[13] = present[sc->index];

  1261.         sc->order = AV_RB32(sc->track_essence_element_key+12);

  1262.     }

  1263. 

  1264.     mxf->timestamp = mxf_parse_timestamp(s->timestamp);

  1265. 

  1266.     if (!samples_per_frame)

  1267.         samples_per_frame = PAL_samples_per_frame;

  1268. 

  1269.     if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)

  1270.         return -1;

  1271. 

  1272.     return 0;

  1273. }

  1274. 

  1275. static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };

  1276. 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 };

  1277. 

  1278. static uint32_t ff_framenum_to_12m_time_code(unsigned frame, int drop, int fps)

  1279. {

  1280.     return (0                                    << 31) | // color frame flag

  1281.            (0                                    << 30) | // drop  frame flag

  1282.            ( ((frame % fps) / 10)                << 28) | // tens  of frames

  1283.            ( ((frame % fps) % 10)                << 24) | // units of frames

  1284.            (0                                    << 23) | // field phase (NTSC), b0 (PAL)

  1285.            ((((frame / fps) % 60) / 10)          << 20) | // tens  of seconds

  1286.            ((((frame / fps) % 60) % 10)          << 16) | // units of seconds

  1287.            (0                                    << 15) | // b0 (NTSC), b2 (PAL)

  1288.            ((((frame / (fps * 60)) % 60) / 10)   << 12) | // tens  of minutes

  1289.            ((((frame / (fps * 60)) % 60) % 10)   <<  8) | // units of minutes

  1290.            (0                                    <<  7) | // b1

  1291.            (0                                    <<  6) | // b2 (NSC), field phase (PAL)

  1292.            ((((frame / (fps * 3600) % 24)) / 10) <<  4) | // tens  of hours

  1293.            (  (frame / (fps * 3600) % 24)) % 10;          // units of hours

  1294. }

  1295. 

  1296. static void mxf_write_system_item(AVFormatContext *s)

  1297. {

  1298.     MXFContext *mxf = s->priv_data;

  1299.     ByteIOContext *pb = s->pb;

  1300.     unsigned fps, frame;

  1301.     uint32_t time_code;

  1302. 

  1303.     frame = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  1304. 

  1305.     // write system metadata pack

  1306.     put_buffer(pb, system_metadata_pack_key, 16);

  1307.     klv_encode_ber_length(pb, 57);

  1308.     put_byte(pb, 0x5c); // UL, user date/time stamp, picture and sound item present

  1309.     put_byte(pb, 0x04); // content package rate

  1310.     put_byte(pb, 0x00); // content package type

  1311.     put_be16(pb, 0x00); // channel handle

  1312.     put_be16(pb, frame); // continuity count

  1313.     if (mxf->essence_container_count > 1)

  1314.         put_buffer(pb, multiple_desc_ul, 16);

  1315.     else

  1316.         put_buffer(pb, mxf_essence_container_uls[mxf->essence_containers_indices[0]].container_ul, 16);

  1317.     put_byte(pb, 0);

  1318.     put_be64(pb, 0);

  1319.     put_be64(pb, 0); // creation date/time stamp

  1320. 

  1321.     // XXX drop frame

  1322.     if (mxf->time_base.den == 30000) fps = 30;

  1323.     else                             fps = 25;

  1324. 

  1325.     put_byte(pb, 0x81); // SMPTE 12M time code

  1326.     time_code = ff_framenum_to_12m_time_code(frame, 0, fps);

  1327.     put_be32(pb, time_code);

  1328.     put_be32(pb, 0); // binary group data

  1329.     put_be64(pb, 0);

  1330. 

  1331.     // write system metadata package set

  1332.     put_buffer(pb, system_metadata_package_set_key, 16);

  1333.     klv_encode_ber_length(pb, 35);

  1334.     put_byte(pb, 0x83); // UMID

  1335.     put_be16(pb, 0x20);

  1336.     mxf_write_umid(pb, SourcePackage, 0);

  1337. }

  1338. 

  1339. static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)

  1340. {

  1341.     MXFContext *mxf = s->priv_data;

  1342.     ByteIOContext *pb = s->pb;

  1343.     AVStream *st = s->streams[pkt->stream_index];

  1344.     MXFStreamContext *sc = st->priv_data;

  1345.     int flags = 0;

  1346. 

  1347.     if (!(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {

  1348.         mxf->index_entries = av_realloc(mxf->index_entries,

  1349.             (mxf->edit_units_count + EDIT_UNITS_PER_BODY)*sizeof(*mxf->index_entries));

  1350.         if (!mxf->index_entries) {

  1351.             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");

  1352.             return -1;

  1353.         }

  1354.     }

  1355. 

  1356.     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {

  1357.         if (!mxf_parse_mpeg2_frame(s, st, pkt, &flags)) {

  1358.             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");

  1359.             return -1;

  1360.         }

  1361.     }

  1362. 

  1363.     if (!mxf->header_written) {

  1364.         mxf_write_partition(s, 0, 0, header_open_partition_key, 1);

  1365.         mxf->header_written = 1;

  1366.     }

  1367. 

  1368.     if (st->index == 0) {

  1369.         if ((!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&

  1370.             !(flags & 0x33)) { // I frame, Gop start

  1371.             mxf_write_klv_fill(s);

  1372.             mxf_write_partition(s, 1, 2, body_partition_key, 0);

  1373. 

  1374.             mxf_write_klv_fill(s);

  1375.             mxf_write_index_table_segment(s);

  1376.         }

  1377. 

  1378.         mxf_write_klv_fill(s);

  1379.         mxf->index_entries[mxf->edit_units_count].offset = url_ftell(pb);

  1380.         mxf->index_entries[mxf->edit_units_count].flags = flags;

  1381.         if (!mxf->first_edit_unit_offset)

  1382.             mxf->first_edit_unit_offset = mxf->index_entries[0].offset;

  1383.         mxf_write_system_item(s);

  1384. 

  1385.         mxf->edit_units_count++;

  1386.     } else if (st->index == 1) {

  1387.         mxf->index_entries[mxf->edit_units_count-1].slice_offset =

  1388.             url_ftell(pb) - mxf->index_entries[mxf->edit_units_count-1].offset;

  1389.     }

  1390. 

  1391.     mxf_write_klv_fill(s);

  1392.     put_buffer(pb, sc->track_essence_element_key, 16); // write key

  1393.     klv_encode_ber_length(pb, pkt->size); // write length

  1394.     put_buffer(pb, pkt->data, pkt->size); // write value

  1395. 

  1396.     sc->duration = FFMAX(pkt->pts + pkt->duration, sc->duration);

  1397. 

  1398.     put_flush_packet(pb);

  1399.     return 0;

  1400. }

  1401. 

  1402. static void mxf_write_random_index_pack(AVFormatContext *s)

  1403. {

  1404.     MXFContext *mxf = s->priv_data;

  1405.     ByteIOContext *pb = s->pb;

  1406.     uint64_t pos = url_ftell(pb);

  1407.     int i;

  1408. 

  1409.     put_buffer(pb, random_index_pack_key, 16);

  1410.     klv_encode_ber_length(pb, 28 + 12*mxf->body_partitions_count);

  1411. 

  1412.     put_be32(pb, 0); // BodySID of header partition

  1413.     put_be64(pb, 0); // offset of header partition

  1414. 

  1415.     for (i = 0; i < mxf->body_partitions_count; i++) {

  1416.         put_be32(pb, 1); // BodySID

  1417.         put_be64(pb, mxf->body_partition_offset[i]);

  1418.     }

  1419. 

  1420.     put_be32(pb, 0); // BodySID of footer partition

  1421.     put_be64(pb, mxf->footer_partition_offset);

  1422. 

  1423.     put_be32(pb, url_ftell(pb) - pos + 4);

  1424. }

  1425. 

  1426. static int mxf_write_footer(AVFormatContext *s)

  1427. {

  1428.     MXFContext *mxf = s->priv_data;

  1429.     ByteIOContext *pb = s->pb;

  1430. 

  1431.     mxf_write_klv_fill(s);

  1432.     mxf->footer_partition_offset = url_ftell(pb);

  1433.     mxf_write_partition(s, 0, 2, footer_partition_key, 0);

  1434. 

  1435.     mxf_write_klv_fill(s);

  1436.     mxf_write_index_table_segment(s);

  1437. 

  1438.     mxf_write_klv_fill(s);

  1439.     mxf_write_random_index_pack(s);

  1440. 

  1441.     if (!url_is_streamed(s->pb)) {

  1442.         url_fseek(pb, 0, SEEK_SET);

  1443.         mxf_write_partition(s, 0, 0, header_closed_partition_key, 1);

  1444.     }

  1445. 

  1446.     ff_audio_interleave_close(s);

  1447. 

  1448.     av_freep(&mxf->index_entries);

  1449.     av_freep(&mxf->body_partition_offset);

  1450. 

  1451.     mxf_free(s);

  1452.     return 0;

  1453. }

  1454. 

  1455. static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  1456. {

  1457.     AVPacketList *pktl;

  1458.     int stream_count = 0;

  1459.     int streams[MAX_STREAMS];

  1460. 

  1461.     memset(streams, 0, sizeof(streams));

  1462.     pktl = s->packet_buffer;

  1463.     while (pktl) {

  1464.         //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);

  1465.         if (!streams[pktl->pkt.stream_index])

  1466.             stream_count++;

  1467.         streams[pktl->pkt.stream_index]++;

  1468.         pktl = pktl->next;

  1469.     }

  1470. 

  1471.     if (stream_count && (s->nb_streams == stream_count || flush)) {

  1472.         pktl = s->packet_buffer;

  1473.         if (s->nb_streams != stream_count) {

  1474.             AVPacketList *first = NULL;

  1475.             // find first packet in edit unit

  1476.             while (pktl) {

  1477.                 AVStream *st = s->streams[pktl->pkt.stream_index];

  1478.                 if (st->index == 0)

  1479.                     break;

  1480.                 else if (!first)

  1481.                     first = pktl;

  1482.                 pktl = pktl->next;

  1483.             }

  1484.             // purge packet queue

  1485.             while (pktl) {

  1486.                 AVPacketList *next = pktl->next;

  1487.                 av_free_packet(&pktl->pkt);

  1488.                 av_freep(&pktl);

  1489.                 pktl = next;

  1490.             }

  1491.             if (!first)

  1492.                 goto out;

  1493.             pktl = first;

  1494.         }

  1495. 

  1496.         *out = pktl->pkt;

  1497.         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);

  1498.         s->packet_buffer = pktl->next;

  1499.         av_freep(&pktl);

  1500.         return 1;

  1501.     } else {

  1502.     out:

  1503.         av_init_packet(out);

  1504.         return 0;

  1505.     }

  1506. }

  1507. 

  1508. static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)

  1509. {

  1510.     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;

  1511.     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;

  1512. 

  1513.     return next->dts > pkt->dts ||

  1514.         (next->dts == pkt->dts && sc->order < sc2->order);

  1515. }

  1516. 

  1517. static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  1518. {

  1519.     return ff_audio_rechunk_interleave(s, out, pkt, flush,

  1520.                                mxf_interleave_get_packet, mxf_compare_timestamps);

  1521. }

  1522. 

  1523. AVOutputFormat mxf_muxer = {

  1524.     "mxf",

  1525.     NULL_IF_CONFIG_SMALL("Material eXchange Format"),

  1526.     NULL,

  1527.     "mxf",

  1528.     sizeof(MXFContext),

  1529.     CODEC_ID_PCM_S16LE,

  1530.     CODEC_ID_MPEG2VIDEO,

  1531.     mxf_write_header,

  1532.     mxf_write_packet,

  1533.     mxf_write_footer,

  1534.     AVFMT_NOTIMESTAMPS,

  1535.     NULL,

  1536.     mxf_interleave,

  1537. };