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

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

  68.     int temporal_reordering;

  69. } MXFStreamContext;

  70. 

  71. typedef struct {

  72.     UID container_ul;

  73.     UID element_ul;

  74.     UID codec_ul;

  75.     void (*write_desc)();

  76. } MXFContainerEssenceEntry;

  77. 

  78. static const struct {

  79.     enum CodecID id;

  80.     int index;

  81. } mxf_essence_mappings[] = {

  82.     { CODEC_ID_MPEG2VIDEO, 0 },

  83.     { CODEC_ID_PCM_S24LE,  1 },

  84.     { CODEC_ID_PCM_S16LE,  1 },

  85.     { 0 }

  86. };

  87. 

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

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

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

  91. 

  92. static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {

  93.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },

  94.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  95.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },

  96.       mxf_write_mpegvideo_desc },

  97.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },

  98.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },

  99.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  100.       mxf_write_aes3_desc },

  101.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },

  102.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },

  103.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  104.       mxf_write_wav_desc },

  105.     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  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.       NULL },

  109. };

  110. 

  111. typedef struct MXFContext {

  112.     int64_t footer_partition_offset;

  113.     int essence_container_count;

  114.     uint8_t essence_containers_indices[FF_ARRAY_ELEMS(mxf_essence_container_uls)];

  115.     AVRational time_base;

  116.     int header_written;

  117.     MXFIndexEntry *index_entries;

  118.     unsigned edit_units_count;

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

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

  121.     int last_indexed_edit_unit;

  122.     uint64_t first_edit_unit_offset;

  123.     uint64_t *body_partition_offset;

  124.     unsigned body_partitions_count;

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

  126.     uint64_t duration;

  127.     AVStream *timecode_track;

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

  129.     int timecode_start;      ///< frame number computed from mpeg-2 gop header timecode

  130.     int timecode_drop_frame; ///< time code use drop frame method frop mpeg-2 essence gop header

  131. } MXFContext;

  132. 

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

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

  135. 

  136. /**

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

  138.  */

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

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

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

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

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

  144. 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

  145. 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

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

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

  148. 

  149. /**

  150.  * partial key for header metadata

  151.  */

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

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

  154. 

  155. /**

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

  157.  */

  158. static const MXFLocalTagPair mxf_local_tag_batch[] = {

  159.     // preface set

  160.     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */

  161.     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */

  162.     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */

  163.     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */

  164.     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */

  165.     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */

  166.     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */

  167.     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */

  168.     // Identification

  169.     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */

  170.     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */

  171.     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */

  172.     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */

  173.     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */

  174.     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */

  175.     // Content Storage

  176.     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */

  177.     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */

  178.     // Essence Container Data

  179.     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */

  180.     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */

  181.     // Package

  182.     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */

  183.     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */

  184.     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */

  185.     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */

  186.     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */

  187.     // Track

  188.     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */

  189.     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */

  190.     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */

  191.     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */

  192.     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */

  193.     // Sequence

  194.     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */

  195.     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */

  196.     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */

  197.     // Source Clip

  198.     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */

  199.     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */

  200.     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */

  201.     // Timecode Component

  202.     { 0x1501, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x05,0x00,0x00}}, /* Start Time Code */

  203.     { 0x1502, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x04,0x01,0x01,0x02,0x06,0x00,0x00}}, /* Rounded Time Code Base */

  204.     { 0x1503, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x04,0x01,0x01,0x05,0x00,0x00,0x00}}, /* Drop Frame */

  205.     // File Descriptor

  206.     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */

  207.     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */

  208.     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */

  209.     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */

  210.     // Generic Picture Essence Descriptor

  211.     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */

  212.     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */

  213.     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */

  214.     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */

  215.     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */

  216.     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */

  217.     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */

  218.     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */

  219.     // CDCI Picture Essence Descriptor

  220.     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */

  221.     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */

  222.     // Generic Sound Essence Descriptor

  223.     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */

  224.     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */

  225.     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */

  226.     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */

  227.     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */

  228.     // Index Table Segment

  229.     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */

  230.     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */

  231.     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */

  232.     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */

  233.     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */

  234.     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */

  235.     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */

  236.     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */

  237.     // MPEG video Descriptor

  238.     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */

  239.     // Wave Audio Essence Descriptor

  240.     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */

  241.     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */

  242. };

  243. 

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

  245. {

  246.     put_buffer(pb, uuid_base, 12);

  247.     put_be16(pb, type);

  248.     put_be16(pb, value);

  249. }

  250. 

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

  252. {

  253.     put_buffer(pb, umid_base, 16);

  254.     mxf_write_uuid(pb, type, value);

  255. }

  256. 

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

  258. {

  259.     put_be32(pb, ref_count);

  260.     put_be32(pb, 16);

  261. }

  262. 

  263. static int klv_ber_length(uint64_t len)

  264. {

  265.     if (len < 128)

  266.         return 1;

  267.     else

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

  269. }

  270. 

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

  272. {

  273.     // Determine the best BER size

  274.     int size;

  275.     if (len < 128) {

  276.         //short form

  277.         put_byte(pb, len);

  278.         return 1;

  279.     }

  280. 

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

  282. 

  283.     // long form

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

  285.     while(size) {

  286.         size--;

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

  288.     }

  289.     return 0;

  290. }

  291. 

  292. /*

  293.  * Get essence container ul index

  294.  */

  295. static int mxf_get_essence_container_ul_index(enum CodecID id)

  296. {

  297.     int i;

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

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

  300.             return mxf_essence_mappings[i].index;

  301.     return -1;

  302. }

  303. 

  304. static void mxf_write_primer_pack(AVFormatContext *s)

  305. {

  306.     ByteIOContext *pb = s->pb;

  307.     int local_tag_number, i = 0;

  308. 

  309.     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);

  310. 

  311.     put_buffer(pb, primer_pack_key, 16);

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

  313. 

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

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

  316. 

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

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

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

  320.     }

  321. }

  322. 

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

  324. {

  325.     put_be16(pb, tag);

  326.     put_be16(pb, size);

  327. }

  328. 

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

  330. {

  331.     put_buffer(pb, header_metadata_key, 13);

  332.     put_be24(pb, value);

  333. }

  334. 

  335. static void mxf_free(AVFormatContext *s)

  336. {

  337.     int i;

  338. 

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

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

  341.         av_freep(&st->priv_data);

  342.     }

  343. }

  344. 

  345. static const MXFCodecUL *mxf_get_data_definition_ul(int type)

  346. {

  347.     const MXFCodecUL *uls = ff_mxf_data_definition_uls;

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

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

  350.             break;

  351.         uls++;

  352.     }

  353.     return uls;

  354. }

  355. 

  356. static void mxf_write_essence_container_refs(AVFormatContext *s)

  357. {

  358.     MXFContext *c = s->priv_data;

  359.     ByteIOContext *pb = s->pb;

  360.     int i;

  361. 

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

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

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

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

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

  367.     }

  368. }

  369. 

  370. static void mxf_write_preface(AVFormatContext *s)

  371. {

  372.     MXFContext *mxf = s->priv_data;

  373.     ByteIOContext *pb = s->pb;

  374. 

  375.     mxf_write_metadata_key(pb, 0x012f00);

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

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

  378. 

  379.     // write preface set uid

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

  381.     mxf_write_uuid(pb, Preface, 0);

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

  383. 

  384.     // last modified date

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

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

  387. 

  388.     // write version

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

  390.     put_be16(pb, 1);

  391. 

  392.     // write identification_refs

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

  394.     mxf_write_refs_count(pb, 1);

  395.     mxf_write_uuid(pb, Identification, 0);

  396. 

  397.     // write content_storage_refs

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

  399.     mxf_write_uuid(pb, ContentStorage, 0);

  400. 

  401.     // operational pattern

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

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

  404.         put_buffer(pb, op1a_ul, 14);

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

  406.     } else {

  407.         put_buffer(pb, op1a_ul, 16);

  408.     }

  409. 

  410.     // write essence_container_refs

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

  412.     mxf_write_essence_container_refs(s);

  413. 

  414.     // write dm_scheme_refs

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

  416.     put_be64(pb, 0);

  417. }

  418. 

  419. /*

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

  421.  */

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

  423. {

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

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

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

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

  428. }

  429. 

  430. static void mxf_write_identification(AVFormatContext *s)

  431. {

  432.     MXFContext *mxf = s->priv_data;

  433.     ByteIOContext *pb = s->pb;

  434.     const char *company = "FFmpeg";

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

  436.     const char *version;

  437.     int length;

  438. 

  439.     mxf_write_metadata_key(pb, 0x013000);

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

  441. 

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

  443.         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);

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

  445.     klv_encode_ber_length(pb, length);

  446. 

  447.     // write uid

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

  449.     mxf_write_uuid(pb, Identification, 0);

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

  451. 

  452.     // write generation uid

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

  454.     mxf_write_uuid(pb, Identification, 1);

  455. 

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

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

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

  459. 

  460.     // write product uid

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

  462.     mxf_write_uuid(pb, Identification, 2);

  463. 

  464.     // modification date

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

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

  467. }

  468. 

  469. static void mxf_write_content_storage(AVFormatContext *s)

  470. {

  471.     ByteIOContext *pb = s->pb;

  472. 

  473.     mxf_write_metadata_key(pb, 0x011800);

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

  475.     klv_encode_ber_length(pb, 92);

  476. 

  477.     // write uid

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

  479.     mxf_write_uuid(pb, ContentStorage, 0);

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

  481. 

  482.     // write package reference

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

  484.     mxf_write_refs_count(pb, 2);

  485.     mxf_write_uuid(pb, MaterialPackage, 0);

  486.     mxf_write_uuid(pb, SourcePackage, 0);

  487. 

  488.     // write essence container data

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

  490.     mxf_write_refs_count(pb, 1);

  491.     mxf_write_uuid(pb, EssenceContainerData, 0);

  492. }

  493. 

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

  495. {

  496.     MXFContext *mxf = s->priv_data;

  497.     ByteIOContext *pb = s->pb;

  498.     MXFStreamContext *sc = st->priv_data;

  499. 

  500.     mxf_write_metadata_key(pb, 0x013b00);

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

  502.     klv_encode_ber_length(pb, 80);

  503. 

  504.     // write track uid

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

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

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

  508. 

  509.     // write track id

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

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

  512. 

  513.     // write track number

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

  515.     if (type == MaterialPackage)

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

  517.     else

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

  519. 

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

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

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

  523. 

  524.     // write origin

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

  526.     put_be64(pb, 0);

  527. 

  528.     // write sequence refs

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

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

  531. }

  532. 

  533. 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 };

  534. 

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

  536. {

  537.     MXFContext *mxf = s->priv_data;

  538.     ByteIOContext *pb = s->pb;

  539. 

  540.     // find data define uls

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

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

  543.         put_buffer(pb, smpte_12m_timecode_track_data_ul, 16);

  544.     else {

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

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

  547.     }

  548. 

  549.     // write duration

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

  551.     put_be64(pb, mxf->duration);

  552. }

  553. 

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

  555. {

  556.     MXFContext *mxf = s->priv_data;

  557.     ByteIOContext *pb = s->pb;

  558.     enum MXFMetadataSetType component;

  559. 

  560.     mxf_write_metadata_key(pb, 0x010f00);

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

  562.     klv_encode_ber_length(pb, 80);

  563. 

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

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

  566. 

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

  568.     mxf_write_common_fields(s, st);

  569. 

  570.     // write structural component

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

  572.     mxf_write_refs_count(pb, 1);

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

  574.         component = TimecodeComponent;

  575.     else if (type == MaterialPackage)

  576.         component = SourceClip;

  577.     else

  578.         component = SourceClip+TypeBottom;

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

  580. }

  581. 

  582. static void mxf_write_timecode_component(AVFormatContext *s, AVStream *st)

  583. {

  584.     MXFContext *mxf = s->priv_data;

  585.     ByteIOContext *pb = s->pb;

  586. 

  587.     mxf_write_metadata_key(pb, 0x011400);

  588.     klv_encode_ber_length(pb, 75);

  589. 

  590.     // UID

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

  592.     mxf_write_uuid(pb, TimecodeComponent, st->index);

  593. 

  594.     mxf_write_common_fields(s, st);

  595. 

  596.     // Start Time Code

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

  598.     put_be64(pb, mxf->timecode_start);

  599. 

  600.     // Rounded Time Code Base

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

  602.     put_be16(pb, mxf->timecode_base);

  603. 

  604.     // Drop Frame

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

  606.     put_byte(pb, mxf->timecode_drop_frame);

  607. }

  608. 

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

  610. {

  611.     ByteIOContext *pb = s->pb;

  612.     int i;

  613. 

  614.     mxf_write_metadata_key(pb, 0x011100);

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

  616.     klv_encode_ber_length(pb, 108);

  617. 

  618.     // write uid

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

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

  621. 

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

  623.     mxf_write_common_fields(s, st);

  624. 

  625.     // write start_position

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

  627.     put_be64(pb, 0);

  628. 

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

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

  631.     if (type == SourcePackage) {

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

  633.             put_be64(pb, 0);

  634.     } else

  635.         mxf_write_umid(pb, SourcePackage, 0);

  636. 

  637.     // write source track id

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

  639.     if (type == SourcePackage)

  640.         put_be32(pb, 0);

  641.     else

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

  643. }

  644. 

  645. static void mxf_write_multi_descriptor(AVFormatContext *s)

  646. {

  647.     MXFContext *mxf = s->priv_data;

  648.     ByteIOContext *pb = s->pb;

  649.     int i;

  650. 

  651.     mxf_write_metadata_key(pb, 0x014400);

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

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

  654. 

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

  656.     mxf_write_uuid(pb, MultipleDescriptor, 0);

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

  658. 

  659.     // write sample rate

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

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

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

  663. 

  664.     // write essence container ul

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

  666.     put_buffer(pb, multiple_desc_ul, 16);

  667. 

  668.     // write sub descriptor refs

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

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

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

  672.         mxf_write_uuid(pb, SubDescriptor, i);

  673. }

  674. 

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

  676. {

  677.     MXFContext *mxf = s->priv_data;

  678.     MXFStreamContext *sc = st->priv_data;

  679.     ByteIOContext *pb = s->pb;

  680. 

  681.     put_buffer(pb, key, 16);

  682.     klv_encode_ber_length(pb, size);

  683. 

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

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

  686. 

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

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

  689. 

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

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

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

  693. 

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

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

  696. }

  697. 

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

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

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

  701. 

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

  703. {

  704.     MXFStreamContext *sc = st->priv_data;

  705.     ByteIOContext *pb = s->pb;

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

  707.     AVRational dar;

  708.     int f1, f2;

  709. 

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

  711. 

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

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

  714. 

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

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

  717. 

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

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

  720. 

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

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

  723. 

  724.     // component depth

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

  726.     put_be32(pb, 8);

  727. 

  728.     // horizontal subsampling

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

  730.     put_be32(pb, 2);

  731. 

  732.     // bit rate

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

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

  735. 

  736.     // frame layout

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

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

  739. 

  740.     // video line map

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

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

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

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

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

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

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

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

  749.     }

  750. 

  751.     if (!sc->interlaced) {

  752.         f2  = 0;

  753.         f1 *= 2;

  754.     }

  755. 

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

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

  758.     put_be32(pb, 4);

  759.     put_be32(pb, f1);

  760.     if (sc->interlaced)

  761.         put_be32(pb, f2);

  762. 

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

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

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

  766.               1024*1024);

  767. 

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

  769.     put_be32(pb, dar.num);

  770.     put_be32(pb, dar.den);

  771. 

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

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

  774. }

  775. 

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

  777. {

  778.     ByteIOContext *pb = s->pb;

  779. 

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

  781. 

  782.     // audio locked

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

  784.     put_byte(pb, 1);

  785. 

  786.     // write audio sampling rate

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

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

  789.     put_be32(pb, 1);

  790. 

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

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

  793. 

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

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

  796. }

  797. 

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

  799. {

  800.     ByteIOContext *pb = s->pb;

  801. 

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

  803. 

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

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

  806. 

  807.     // avg bytes per sec

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

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

  810. }

  811. 

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

  813. {

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

  815. }

  816. 

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

  818. {

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

  820. }

  821. 

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

  823. {

  824.     MXFContext *mxf = s->priv_data;

  825.     ByteIOContext *pb = s->pb;

  826.     int i, track_count;

  827. 

  828.     if (type == MaterialPackage) {

  829.         track_count = s->nb_streams + 1; // add timecode track

  830.         mxf_write_metadata_key(pb, 0x013600);

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

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

  833.     } else {

  834.         track_count = s->nb_streams;

  835.         mxf_write_metadata_key(pb, 0x013700);

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

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

  838.     }

  839. 

  840.     // write uid

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

  842.     mxf_write_uuid(pb, type, 0);

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

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

  845. 

  846.     // write package umid

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

  848.     mxf_write_umid(pb, type, 0);

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

  850. 

  851.     // package creation date

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

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

  854. 

  855.     // package modified date

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

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

  858. 

  859.     // write track refs

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

  861.     mxf_write_refs_count(pb, track_count);

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

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

  864.     if (type == MaterialPackage)

  865.         mxf_write_uuid(pb, Track, s->nb_streams); // timecode track

  866. 

  867.     // write multiple descriptor reference

  868.     if (type == SourcePackage) {

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

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

  871.             mxf_write_uuid(pb, MultipleDescriptor, 0);

  872.             mxf_write_multi_descriptor(s);

  873.         } else

  874.             mxf_write_uuid(pb, SubDescriptor, 0);

  875.     } else {

  876.         // write timecode track

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

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

  879.         mxf_write_timecode_component(s, mxf->timecode_track);

  880.     }

  881. 

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

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

  884.         mxf_write_track(s, st, type);

  885.         mxf_write_sequence(s, st, type);

  886.         mxf_write_structural_component(s, st, type);

  887. 

  888.         if (type == SourcePackage) {

  889.             MXFStreamContext *sc = st->priv_data;

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

  891.         }

  892.     }

  893. }

  894. 

  895. static int mxf_write_essence_container_data(AVFormatContext *s)

  896. {

  897.     ByteIOContext *pb = s->pb;

  898. 

  899.     mxf_write_metadata_key(pb, 0x012300);

  900.     klv_encode_ber_length(pb, 72);

  901. 

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

  903.     mxf_write_uuid(pb, EssenceContainerData, 0);

  904. 

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

  906.     mxf_write_umid(pb, SourcePackage, 0);

  907. 

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

  909.     put_be32(pb, 1);

  910. 

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

  912.     put_be32(pb, 2);

  913. 

  914.     return 0;

  915. }

  916. 

  917. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  918. {

  919.     mxf_write_preface(s);

  920.     mxf_write_identification(s);

  921.     mxf_write_content_storage(s);

  922.     mxf_write_package(s, MaterialPackage);

  923.     mxf_write_package(s, SourcePackage);

  924.     mxf_write_essence_container_data(s);

  925.     return 0;

  926. }

  927. 

  928. static unsigned klv_fill_size(uint64_t size)

  929. {

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

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

  932.         return pad + KAG_SIZE;

  933.     else

  934.         return pad & (KAG_SIZE-1);

  935. }

  936. 

  937. static void mxf_write_index_table_segment(AVFormatContext *s)

  938. {

  939.     MXFContext *mxf = s->priv_data;

  940.     ByteIOContext *pb = s->pb;

  941.     int i, j;

  942.     int temporal_reordering = 0;

  943.     int key_index = mxf->last_key_index;

  944. 

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

  946. 

  947.     if (!mxf->edit_units_count)

  948.         return;

  949. 

  950.     put_buffer(pb, index_table_segment_key, 16);

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

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

  953. 

  954.     // instance id

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

  956.     mxf_write_uuid(pb, IndexTableSegment, 0);

  957. 

  958.     // index edit rate

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

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

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

  962. 

  963.     // index start position

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

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

  966. 

  967.     // index duration

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

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

  970. 

  971.     // edit unit byte count

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

  973.     put_be32(pb, 0);

  974. 

  975.     // index sid

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

  977.     put_be32(pb, 2);

  978. 

  979.     // body sid

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

  981.     put_be32(pb, 1);

  982. 

  983.     // real slice count - 1

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

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

  986. 

  987.     // delta entry array

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

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

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

  991.     // write system item delta entry

  992.     put_byte(pb, 0);

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

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

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

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

  997.         MXFStreamContext *sc = st->priv_data;

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

  999.         if (sc->temporal_reordering)

  1000.             temporal_reordering = 1;

  1001.         // slice number

  1002.         if (i == 0) { // video track

  1003.             put_byte(pb, 0); // slice number

  1004.             put_be32(pb, KAG_SIZE); // system item size including klv fill

  1005.         } else { // audio track

  1006.             unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;

  1007.             audio_frame_size += klv_fill_size(audio_frame_size);

  1008.             put_byte(pb, 1);

  1009.             put_be32(pb, (i-1)*audio_frame_size); // element delta

  1010.         }

  1011.     }

  1012. 

  1013.     mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);

  1014.     put_be32(pb, mxf->edit_units_count);  // num of entries

  1015.     put_be32(pb, 11+mxf->slice_count*4);  // size of one entry

  1016.     for (i = 0; i < mxf->edit_units_count; i++) {

  1017.         if (temporal_reordering) {

  1018.             int temporal_offset = 0;

  1019.             for (j = i+1; j < mxf->edit_units_count; j++) {

  1020.                 temporal_offset++;

  1021.                 if (mxf->index_entries[j].flags & 0x10) { // backward prediction

  1022.                     // next is not b, so is reordered

  1023.                     if (!(mxf->index_entries[i+1].flags & 0x10)) {

  1024.                         if ((mxf->index_entries[i].flags & 0x11) == 0) // i frame

  1025.                             temporal_offset = 0;

  1026.                         else

  1027.                             temporal_offset = -temporal_offset;

  1028.                     }

  1029.                     break;

  1030.                 }

  1031.             }

  1032.             put_byte(pb, temporal_offset);

  1033.         } else

  1034.             put_byte(pb, 0);

  1035.         if (!(mxf->index_entries[i].flags & 0x33)) { // I frame

  1036.             mxf->last_key_index = key_index;

  1037.             key_index = i;

  1038.         }

  1039.         if (mxf->index_entries[i].flags & 0x10 && // backward prediction

  1040.             !(mxf->index_entries[key_index].flags & 0x80)) { // open gop

  1041.             put_byte(pb, mxf->last_key_index - i);

  1042.         } else {

  1043.             put_byte(pb, key_index - i); // key frame offset

  1044.             if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward

  1045.                 mxf->last_key_index = key_index;

  1046.         }

  1047.         put_byte(pb, mxf->index_entries[i].flags);

  1048.         // stream offset

  1049.         put_be64(pb, mxf->index_entries[i].offset - mxf->first_edit_unit_offset);

  1050.         if (s->nb_streams > 1)

  1051.             put_be32(pb, mxf->index_entries[i].slice_offset);

  1052.     }

  1053. 

  1054.     mxf->last_key_index = key_index - mxf->edit_units_count;

  1055.     mxf->last_indexed_edit_unit += mxf->edit_units_count;

  1056.     mxf->edit_units_count = 0;

  1057. }

  1058. 

  1059. static void mxf_write_klv_fill(AVFormatContext *s)

  1060. {

  1061.     unsigned pad = klv_fill_size(url_ftell(s->pb));

  1062.     if (pad) {

  1063.         put_buffer(s->pb, klv_fill_key, 16);

  1064.         pad -= 16;

  1065.         pad -= klv_ber_length(pad);

  1066.         klv_encode_ber_length(s->pb, pad);

  1067.         for (; pad > 7; pad -= 8)

  1068.             put_be64(s->pb, 0);

  1069.         for (; pad; pad--)

  1070.             put_byte(s->pb, 0);

  1071.         assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));

  1072.     }

  1073. }

  1074. 

  1075. static void mxf_write_partition(AVFormatContext *s, int bodysid,

  1076.                                 int indexsid,

  1077.                                 const uint8_t *key, int write_metadata)

  1078. {

  1079.     MXFContext *mxf = s->priv_data;

  1080.     ByteIOContext *pb = s->pb;

  1081.     int64_t header_byte_count_offset;

  1082.     unsigned index_byte_count = 0;

  1083.     uint64_t partition_offset = url_ftell(pb);

  1084. 

  1085.     if (mxf->edit_units_count) {

  1086.         index_byte_count = 109 + (s->nb_streams+1)*6 +

  1087.             mxf->edit_units_count*(11+mxf->slice_count*4);

  1088.         // add encoded ber length

  1089.         index_byte_count += 16 + klv_ber_length(index_byte_count);

  1090.         index_byte_count += klv_fill_size(index_byte_count);

  1091.     }

  1092. 

  1093.     if (!memcmp(key, body_partition_key, 16)) {

  1094.         mxf->body_partition_offset =

  1095.             av_realloc(mxf->body_partition_offset,

  1096.                        (mxf->body_partitions_count+1)*

  1097.                        sizeof(*mxf->body_partition_offset));

  1098.         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;

  1099.     }

  1100. 

  1101.     // write klv

  1102.     put_buffer(pb, key, 16);

  1103. 

  1104.     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);

  1105. 

  1106.     // write partition value

  1107.     put_be16(pb, 1); // majorVersion

  1108.     put_be16(pb, 2); // minorVersion

  1109.     put_be32(pb, KAG_SIZE); // KAGSize

  1110. 

  1111.     put_be64(pb, partition_offset); // ThisPartition

  1112. 

  1113.     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)

  1114.         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition

  1115.     else if (!memcmp(key, footer_partition_key, 16))

  1116.         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition

  1117.     else

  1118.         put_be64(pb, 0);

  1119. 

  1120.     put_be64(pb, mxf->footer_partition_offset); // footerPartition

  1121. 

  1122.     // set offset

  1123.     header_byte_count_offset = url_ftell(pb);

  1124.     put_be64(pb, 0); // headerByteCount, update later

  1125. 

  1126.     // indexTable

  1127.     put_be64(pb, index_byte_count); // indexByteCount

  1128.     put_be32(pb, index_byte_count ? indexsid : 0); // indexSID

  1129. 

  1130.     // BodyOffset

  1131.     if (bodysid && mxf->edit_units_count) {

  1132.         uint64_t partition_end = url_ftell(pb) + 8 + 4 + 16 + 8 +

  1133.             16*mxf->essence_container_count;

  1134.         put_be64(pb, partition_end + klv_fill_size(partition_end) +

  1135.                  index_byte_count - mxf->first_edit_unit_offset);

  1136.     } else

  1137.         put_be64(pb, 0);

  1138. 

  1139.     put_be32(pb, bodysid); // bodySID

  1140. 

  1141.     // operational pattern

  1142.     if (s->nb_streams > 1) {

  1143.         put_buffer(pb, op1a_ul, 14);

  1144.         put_be16(pb, 0x0900); // multi track

  1145.     } else {

  1146.         put_buffer(pb, op1a_ul, 16);

  1147.     }

  1148. 

  1149.     // essence container

  1150.     mxf_write_essence_container_refs(s);

  1151. 

  1152.     if (write_metadata) {

  1153.         // mark the start of the headermetadata and calculate metadata size

  1154.         int64_t pos, start;

  1155.         unsigned header_byte_count;

  1156. 

  1157.         mxf_write_klv_fill(s);

  1158.         start = url_ftell(s->pb);

  1159.         mxf_write_primer_pack(s);

  1160.         mxf_write_header_metadata_sets(s);

  1161.         pos = url_ftell(s->pb);

  1162.         header_byte_count = pos - start + klv_fill_size(pos);

  1163. 

  1164.         // update header_byte_count

  1165.         url_fseek(pb, header_byte_count_offset, SEEK_SET);

  1166.         put_be64(pb, header_byte_count);

  1167.         url_fseek(pb, pos, SEEK_SET);

  1168.     }

  1169. 

  1170.     put_flush_packet(pb);

  1171. }

  1172. 

  1173. static const UID mxf_mpeg2_codec_uls[] = {

  1174.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame

  1175.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP

  1176.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame

  1177.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP

  1178.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame

  1179.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP

  1180.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame

  1181.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP

  1182. };

  1183. 

  1184. static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)

  1185. {

  1186.     if (avctx->profile == 4) { // Main

  1187.         if (avctx->level == 8) // Main

  1188.             return avctx->gop_size ?

  1189.                 &mxf_mpeg2_codec_uls[1] :

  1190.                 &mxf_mpeg2_codec_uls[0];

  1191.         else if (avctx->level == 4) // High

  1192.             return avctx->gop_size ?

  1193.                 &mxf_mpeg2_codec_uls[5] :

  1194.                 &mxf_mpeg2_codec_uls[4];

  1195.     } else if (avctx->profile == 0) { // 422

  1196.         if (avctx->level == 5) // Main

  1197.             return avctx->gop_size ?

  1198.                 &mxf_mpeg2_codec_uls[3] :

  1199.                 &mxf_mpeg2_codec_uls[2];

  1200.         else if (avctx->level == 2) // High

  1201.             return avctx->gop_size ?

  1202.                 &mxf_mpeg2_codec_uls[7] :

  1203.                 &mxf_mpeg2_codec_uls[6];

  1204.     }

  1205.     return NULL;

  1206. }

  1207. 

  1208. static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt, int *flags)

  1209. {

  1210.     MXFStreamContext *sc = st->priv_data;

  1211.     MXFContext *mxf = s->priv_data;

  1212.     uint32_t c = -1;

  1213.     int i;

  1214. 

  1215.     *flags = 0;

  1216. 

  1217.     for(i = 0; i < pkt->size - 4; i++) {

  1218.         c = (c<<8) + pkt->data[i];

  1219.         if (c == 0x1B5) {

  1220.             if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext

  1221.                 st->codec->profile = pkt->data[i+1] & 0x07;

  1222.                 st->codec->level   = pkt->data[i+2] >> 4;

  1223.             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext

  1224.                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame

  1225.                 break;

  1226.             }

  1227.         } else if (c == 0x1b8) { // gop

  1228.             if (i + 4 < pkt->size) {

  1229.                 if (pkt->data[i+4]>>6 & 0x01) // closed

  1230.                     *flags |= 0x80; // random access

  1231.                 if (!mxf->header_written) {

  1232.                     unsigned hours   =  (pkt->data[i+1]>>2) & 0x1f;

  1233.                     unsigned minutes = ((pkt->data[i+1] & 0x03) << 4) | (pkt->data[i+2]>>4);

  1234.                     unsigned seconds = ((pkt->data[i+2] & 0x07) << 3) | (pkt->data[i+3]>>5);

  1235.                     unsigned frames  = ((pkt->data[i+3] & 0x1f) << 1) | (pkt->data[i+4]>>7);

  1236.                     mxf->timecode_drop_frame = !!(pkt->data[i+1] & 0x80);

  1237.                     mxf->timecode_start = (hours*3600 + minutes*60 + seconds) *

  1238.                         mxf->timecode_base + frames;

  1239.                     if (mxf->timecode_drop_frame) {

  1240.                         unsigned tminutes = 60 * hours + minutes;

  1241.                         mxf->timecode_start -= 2 * (tminutes - tminutes / 10);

  1242.                     }

  1243.                     av_log(s, AV_LOG_DEBUG, "frame %d %d:%d:%d%c%d\n", mxf->timecode_start,

  1244.                            hours, minutes, seconds, mxf->timecode_drop_frame ? ';':':', frames);

  1245.                 }

  1246.             }

  1247.         } else if (c == 0x1b3) { // seq

  1248.             *flags |= 0x40;

  1249.         } else if (c == 0x100) { // pic

  1250.             int pict_type = (pkt->data[i+2]>>3) & 0x07;

  1251.             if (pict_type == 2) { // P frame

  1252.                 *flags |= 0x22;

  1253.                 st->codec->gop_size = 1;

  1254.             } else if (pict_type == 3) { // B frame

  1255.                 *flags |= 0x33;

  1256.                 sc->temporal_reordering = -1;

  1257.             } else if (!pict_type) {

  1258.                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");

  1259.                 return 0;

  1260.             }

  1261.         }

  1262.     }

  1263.     sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);

  1264.     return !!sc->codec_ul;

  1265. }

  1266. 

  1267. static uint64_t mxf_parse_timestamp(time_t timestamp)

  1268. {

  1269.     struct tm *time = localtime(&timestamp);

  1270.     return (uint64_t)(time->tm_year+1900) << 48 |

  1271.            (uint64_t)(time->tm_mon+1)     << 40 |

  1272.            (uint64_t) time->tm_mday       << 32 |

  1273.                       time->tm_hour       << 24 |

  1274.                       time->tm_min        << 16 |

  1275.                       time->tm_sec        << 8;

  1276. }

  1277. 

  1278. static int mxf_write_header(AVFormatContext *s)

  1279. {

  1280.     MXFContext *mxf = s->priv_data;

  1281.     int i;

  1282.     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};

  1283.     const int *samples_per_frame = NULL;

  1284. 

  1285.     for (i = 0; i < s->nb_streams; i++) {

  1286.         AVStream *st = s->streams[i];

  1287.         MXFStreamContext *sc = av_mallocz(sizeof(*sc));

  1288.         if (!sc)

  1289.             return AVERROR(ENOMEM);

  1290.         st->priv_data = sc;

  1291. 

  1292.         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {

  1293.             if (i != 0) {

  1294.                 av_log(s, AV_LOG_ERROR, "video stream must be first track\n");

  1295.                 return -1;

  1296.             }

  1297.             if (fabs(av_q2d(st->codec->time_base) - 1/25.0) < 0.0001) {

  1298.                 samples_per_frame = PAL_samples_per_frame;

  1299.                 mxf->time_base = (AVRational){ 1, 25 };

  1300.                 mxf->timecode_base = 25;

  1301.             } else if (fabs(av_q2d(st->codec->time_base) - 1001/30000.0) < 0.0001) {

  1302.                 samples_per_frame = NTSC_samples_per_frame;

  1303.                 mxf->time_base = (AVRational){ 1001, 30000 };

  1304.                 mxf->timecode_base = 30;

  1305.             } else {

  1306.                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");

  1307.                 return -1;

  1308.             }

  1309.             av_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);

  1310.         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {

  1311.             if (st->codec->sample_rate != 48000) {

  1312.                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");

  1313.                 return -1;

  1314.             }

  1315.             av_set_pts_info(st, 64, 1, st->codec->sample_rate);

  1316.             mxf->slice_count = 1;

  1317.         }

  1318. 

  1319.         sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);

  1320.         if (sc->index == -1) {

  1321.             av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "

  1322.                    "codec not currently supported in container\n", i);

  1323.             return -1;

  1324.         }

  1325. 

  1326.         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;

  1327. 

  1328.         if (!present[sc->index]) {

  1329.             mxf->essence_containers_indices[mxf->essence_container_count++] = sc->index;

  1330.             present[sc->index] = 1;

  1331.         } else

  1332.             present[sc->index]++;

  1333.         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);

  1334.         sc->track_essence_element_key[15] = present[sc->index];

  1335.         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);

  1336.     }

  1337. 

  1338.     for (i = 0; i < s->nb_streams; i++) {

  1339.         MXFStreamContext *sc = s->streams[i]->priv_data;

  1340.         // update element count

  1341.         sc->track_essence_element_key[13] = present[sc->index];

  1342.         sc->order = AV_RB32(sc->track_essence_element_key+12);

  1343.     }

  1344. 

  1345.     mxf->timestamp = mxf_parse_timestamp(s->timestamp);

  1346.     mxf->duration = -1;

  1347. 

  1348.     mxf->timecode_track = av_mallocz(sizeof(*mxf->timecode_track));

  1349.     if (!mxf->timecode_track)

  1350.         return AVERROR(ENOMEM);

  1351.     mxf->timecode_track->priv_data = av_mallocz(sizeof(MXFStreamContext));

  1352.     if (!mxf->timecode_track->priv_data)

  1353.         return AVERROR(ENOMEM);

  1354.     mxf->timecode_track->index = s->nb_streams;

  1355. 

  1356.     if (!samples_per_frame)

  1357.         samples_per_frame = PAL_samples_per_frame;

  1358. 

  1359.     if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)

  1360.         return -1;

  1361. 

  1362.     return 0;

  1363. }

  1364. 

  1365. static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };

  1366. 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 };

  1367. 

  1368. static uint32_t ff_framenum_to_12m_time_code(unsigned frame, int drop, int fps)

  1369. {

  1370.     return (0                                    << 31) | // color frame flag

  1371.            (0                                    << 30) | // drop  frame flag

  1372.            ( ((frame % fps) / 10)                << 28) | // tens  of frames

  1373.            ( ((frame % fps) % 10)                << 24) | // units of frames

  1374.            (0                                    << 23) | // field phase (NTSC), b0 (PAL)

  1375.            ((((frame / fps) % 60) / 10)          << 20) | // tens  of seconds

  1376.            ((((frame / fps) % 60) % 10)          << 16) | // units of seconds

  1377.            (0                                    << 15) | // b0 (NTSC), b2 (PAL)

  1378.            ((((frame / (fps * 60)) % 60) / 10)   << 12) | // tens  of minutes

  1379.            ((((frame / (fps * 60)) % 60) % 10)   <<  8) | // units of minutes

  1380.            (0                                    <<  7) | // b1

  1381.            (0                                    <<  6) | // b2 (NSC), field phase (PAL)

  1382.            ((((frame / (fps * 3600) % 24)) / 10) <<  4) | // tens  of hours

  1383.            (  (frame / (fps * 3600) % 24)) % 10;          // units of hours

  1384. }

  1385. 

  1386. static void mxf_write_system_item(AVFormatContext *s)

  1387. {

  1388.     MXFContext *mxf = s->priv_data;

  1389.     ByteIOContext *pb = s->pb;

  1390.     unsigned frame;

  1391.     uint32_t time_code;

  1392. 

  1393.     frame = mxf->timecode_start + mxf->last_indexed_edit_unit + mxf->edit_units_count;

  1394. 

  1395.     // write system metadata pack

  1396.     put_buffer(pb, system_metadata_pack_key, 16);

  1397.     klv_encode_ber_length(pb, 57);

  1398.     put_byte(pb, 0x5c); // UL, user date/time stamp, picture and sound item present

  1399.     put_byte(pb, 0x04); // content package rate

  1400.     put_byte(pb, 0x00); // content package type

  1401.     put_be16(pb, 0x00); // channel handle

  1402.     put_be16(pb, frame); // continuity count

  1403.     if (mxf->essence_container_count > 1)

  1404.         put_buffer(pb, multiple_desc_ul, 16);

  1405.     else

  1406.         put_buffer(pb, mxf_essence_container_uls[mxf->essence_containers_indices[0]].container_ul, 16);

  1407.     put_byte(pb, 0);

  1408.     put_be64(pb, 0);

  1409.     put_be64(pb, 0); // creation date/time stamp

  1410. 

  1411.     put_byte(pb, 0x81); // SMPTE 12M time code

  1412.     time_code = ff_framenum_to_12m_time_code(frame, mxf->timecode_drop_frame, mxf->timecode_base);

  1413.     put_be32(pb, time_code);

  1414.     put_be32(pb, 0); // binary group data

  1415.     put_be64(pb, 0);

  1416. 

  1417.     // write system metadata package set

  1418.     put_buffer(pb, system_metadata_package_set_key, 16);

  1419.     klv_encode_ber_length(pb, 35);

  1420.     put_byte(pb, 0x83); // UMID

  1421.     put_be16(pb, 0x20);

  1422.     mxf_write_umid(pb, SourcePackage, 0);

  1423. }

  1424. 

  1425. static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)

  1426. {

  1427.     MXFContext *mxf = s->priv_data;

  1428.     ByteIOContext *pb = s->pb;

  1429.     AVStream *st = s->streams[pkt->stream_index];

  1430.     MXFStreamContext *sc = st->priv_data;

  1431.     int flags = 0;

  1432. 

  1433.     if (!(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {

  1434.         mxf->index_entries = av_realloc(mxf->index_entries,

  1435.             (mxf->edit_units_count + EDIT_UNITS_PER_BODY)*sizeof(*mxf->index_entries));

  1436.         if (!mxf->index_entries) {

  1437.             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");

  1438.             return -1;

  1439.         }

  1440.     }

  1441. 

  1442.     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {

  1443.         if (!mxf_parse_mpeg2_frame(s, st, pkt, &flags)) {

  1444.             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");

  1445.             return -1;

  1446.         }

  1447.     }

  1448. 

  1449.     if (!mxf->header_written) {

  1450.         mxf_write_partition(s, 0, 0, header_open_partition_key, 1);

  1451.         mxf->header_written = 1;

  1452.     }

  1453. 

  1454.     if (st->index == 0) {

  1455.         if ((!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&

  1456.             !(flags & 0x33)) { // I frame, Gop start

  1457.             mxf_write_klv_fill(s);

  1458.             mxf_write_partition(s, 1, 2, body_partition_key, 0);

  1459. 

  1460.             mxf_write_klv_fill(s);

  1461.             mxf_write_index_table_segment(s);

  1462.         }

  1463. 

  1464.         mxf_write_klv_fill(s);

  1465.         mxf->index_entries[mxf->edit_units_count].offset = url_ftell(pb);

  1466.         mxf->index_entries[mxf->edit_units_count].flags = flags;

  1467.         if (!mxf->first_edit_unit_offset)

  1468.             mxf->first_edit_unit_offset = mxf->index_entries[0].offset;

  1469.         mxf_write_system_item(s);

  1470. 

  1471.         mxf->edit_units_count++;

  1472.     } else if (st->index == 1) {

  1473.         mxf->index_entries[mxf->edit_units_count-1].slice_offset =

  1474.             url_ftell(pb) - mxf->index_entries[mxf->edit_units_count-1].offset;

  1475.     }

  1476. 

  1477.     mxf_write_klv_fill(s);

  1478.     put_buffer(pb, sc->track_essence_element_key, 16); // write key

  1479.     klv_encode_ber_length(pb, pkt->size); // write length

  1480.     put_buffer(pb, pkt->data, pkt->size); // write value

  1481. 

  1482.     put_flush_packet(pb);

  1483.     return 0;

  1484. }

  1485. 

  1486. static void mxf_write_random_index_pack(AVFormatContext *s)

  1487. {

  1488.     MXFContext *mxf = s->priv_data;

  1489.     ByteIOContext *pb = s->pb;

  1490.     uint64_t pos = url_ftell(pb);

  1491.     int i;

  1492. 

  1493.     put_buffer(pb, random_index_pack_key, 16);

  1494.     klv_encode_ber_length(pb, 28 + 12*mxf->body_partitions_count);

  1495. 

  1496.     put_be32(pb, 0); // BodySID of header partition

  1497.     put_be64(pb, 0); // offset of header partition

  1498. 

  1499.     for (i = 0; i < mxf->body_partitions_count; i++) {

  1500.         put_be32(pb, 1); // BodySID

  1501.         put_be64(pb, mxf->body_partition_offset[i]);

  1502.     }

  1503. 

  1504.     put_be32(pb, 0); // BodySID of footer partition

  1505.     put_be64(pb, mxf->footer_partition_offset);

  1506. 

  1507.     put_be32(pb, url_ftell(pb) - pos + 4);

  1508. }

  1509. 

  1510. static int mxf_write_footer(AVFormatContext *s)

  1511. {

  1512.     MXFContext *mxf = s->priv_data;

  1513.     ByteIOContext *pb = s->pb;

  1514. 

  1515.     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;

  1516. 

  1517.     mxf_write_klv_fill(s);

  1518.     mxf->footer_partition_offset = url_ftell(pb);

  1519.     mxf_write_partition(s, 0, 2, footer_partition_key, 0);

  1520. 

  1521.     mxf_write_klv_fill(s);

  1522.     mxf_write_index_table_segment(s);

  1523. 

  1524.     mxf_write_klv_fill(s);

  1525.     mxf_write_random_index_pack(s);

  1526. 

  1527.     if (!url_is_streamed(s->pb)) {

  1528.         url_fseek(pb, 0, SEEK_SET);

  1529.         mxf_write_partition(s, 0, 0, header_closed_partition_key, 1);

  1530.     }

  1531. 

  1532.     ff_audio_interleave_close(s);

  1533. 

  1534.     av_freep(&mxf->index_entries);

  1535.     av_freep(&mxf->body_partition_offset);

  1536.     av_freep(&mxf->timecode_track->priv_data);

  1537.     av_freep(&mxf->timecode_track);

  1538. 

  1539.     mxf_free(s);

  1540.     return 0;

  1541. }

  1542. 

  1543. static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  1544. {

  1545.     AVPacketList *pktl;

  1546.     int stream_count = 0;

  1547.     int streams[MAX_STREAMS];

  1548. 

  1549.     memset(streams, 0, sizeof(streams));

  1550.     pktl = s->packet_buffer;

  1551.     while (pktl) {

  1552.         //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);

  1553.         if (!streams[pktl->pkt.stream_index])

  1554.             stream_count++;

  1555.         streams[pktl->pkt.stream_index]++;

  1556.         pktl = pktl->next;

  1557.     }

  1558. 

  1559.     if (stream_count && (s->nb_streams == stream_count || flush)) {

  1560.         pktl = s->packet_buffer;

  1561.         if (s->nb_streams != stream_count) {

  1562.             AVPacketList *first = NULL;

  1563.             // find first packet in edit unit

  1564.             while (pktl) {

  1565.                 AVStream *st = s->streams[pktl->pkt.stream_index];

  1566.                 if (st->index == 0)

  1567.                     break;

  1568.                 else if (!first)

  1569.                     first = pktl;

  1570.                 pktl = pktl->next;

  1571.             }

  1572.             // purge packet queue

  1573.             while (pktl) {

  1574.                 AVPacketList *next = pktl->next;

  1575.                 av_free_packet(&pktl->pkt);

  1576.                 av_freep(&pktl);

  1577.                 pktl = next;

  1578.             }

  1579.             if (!first)

  1580.                 goto out;

  1581.             pktl = first;

  1582.         }

  1583. 

  1584.         *out = pktl->pkt;

  1585.         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);

  1586.         s->packet_buffer = pktl->next;

  1587.         av_freep(&pktl);

  1588.         return 1;

  1589.     } else {

  1590.     out:

  1591.         av_init_packet(out);

  1592.         return 0;

  1593.     }

  1594. }

  1595. 

  1596. static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)

  1597. {

  1598.     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;

  1599.     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;

  1600. 

  1601.     return next->dts > pkt->dts ||

  1602.         (next->dts == pkt->dts && sc->order < sc2->order);

  1603. }

  1604. 

  1605. static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  1606. {

  1607.     return ff_audio_rechunk_interleave(s, out, pkt, flush,

  1608.                                mxf_interleave_get_packet, mxf_compare_timestamps);

  1609. }

  1610. 

  1611. AVOutputFormat mxf_muxer = {

  1612.     "mxf",

  1613.     NULL_IF_CONFIG_SMALL("Material eXchange Format"),

  1614.     NULL,

  1615.     "mxf",

  1616.     sizeof(MXFContext),

  1617.     CODEC_ID_PCM_S16LE,

  1618.     CODEC_ID_MPEG2VIDEO,

  1619.     mxf_write_header,

  1620.     mxf_write_packet,

  1621.     mxf_write_footer,

  1622.     AVFMT_NOTIMESTAMPS,

  1623.     NULL,

  1624.     mxf_interleave,

  1625. };