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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 MXF_INDEX_CLUSTER_SIZE 4096

  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. } MXFContext;

  123. 

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

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

  126. 

  127. /**

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

  129.  */

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

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

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

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

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

  135. 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

  136. 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

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

  138. 

  139. /**

  140.  * partial key for header metadata

  141.  */

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

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

  144. 

  145. /**

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

  147.  */

  148. static const MXFLocalTagPair mxf_local_tag_batch[] = {

  149.     // preface set

  150.     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */

  151.     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */

  152.     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */

  153.     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */

  154.     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */

  155.     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */

  156.     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */

  157.     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */

  158.     // Identification

  159.     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */

  160.     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */

  161.     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */

  162.     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */

  163.     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */

  164.     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */

  165.     // Content Storage

  166.     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */

  167.     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */

  168.     // Essence Container Data

  169.     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */

  170.     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */

  171.     // Package

  172.     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */

  173.     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */

  174.     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */

  175.     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */

  176.     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */

  177.     // Track

  178.     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */

  179.     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */

  180.     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */

  181.     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */

  182.     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */

  183.     // Sequence

  184.     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */

  185.     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */

  186.     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */

  187.     // Source Clip

  188.     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */

  189.     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */

  190.     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */

  191.     // File Descriptor

  192.     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */

  193.     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */

  194.     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */

  195.     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */

  196.     // Generic Picture Essence Descriptor

  197.     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */

  198.     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */

  199.     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */

  200.     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */

  201.     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */

  202.     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */

  203.     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */

  204.     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */

  205.     // CDCI Picture Essence Descriptor

  206.     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */

  207.     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */

  208.     // Generic Sound Essence Descriptor

  209.     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */

  210.     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */

  211.     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */

  212.     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */

  213.     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */

  214.     // Index Table Segment

  215.     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */

  216.     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */

  217.     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */

  218.     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */

  219.     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */

  220.     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */

  221.     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */

  222.     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */

  223.     // MPEG video Descriptor

  224.     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */

  225.     // Wave Audio Essence Descriptor

  226.     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */

  227.     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */

  228. };

  229. 

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

  231. {

  232.     put_buffer(pb, uuid_base, 12);

  233.     put_be16(pb, type);

  234.     put_be16(pb, value);

  235. }

  236. 

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

  238. {

  239.     put_buffer(pb, umid_base, 16);

  240.     mxf_write_uuid(pb, type, value);

  241. }

  242. 

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

  244. {

  245.     put_be32(pb, ref_count);

  246.     put_be32(pb, 16);

  247. }

  248. 

  249. static int klv_ber_length(uint64_t len)

  250. {

  251.     if (len < 128)

  252.         return 1;

  253.     else

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

  255. }

  256. 

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

  258. {

  259.     // Determine the best BER size

  260.     int size;

  261.     if (len < 128) {

  262.         //short form

  263.         put_byte(pb, len);

  264.         return 1;

  265.     }

  266. 

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

  268. 

  269.     // long form

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

  271.     while(size) {

  272.         size--;

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

  274.     }

  275.     return 0;

  276. }

  277. 

  278. /*

  279.  * Get essence container ul index

  280.  */

  281. static int mxf_get_essence_container_ul_index(enum CodecID id)

  282. {

  283.     int i;

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

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

  286.             return mxf_essence_mappings[i].index;

  287.     return -1;

  288. }

  289. 

  290. static void mxf_write_primer_pack(AVFormatContext *s)

  291. {

  292.     ByteIOContext *pb = s->pb;

  293.     int local_tag_number, i = 0;

  294. 

  295.     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);

  296. 

  297.     put_buffer(pb, primer_pack_key, 16);

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

  299. 

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

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

  302. 

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

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

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

  306.     }

  307. }

  308. 

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

  310. {

  311.     put_be16(pb, tag);

  312.     put_be16(pb, size);

  313. }

  314. 

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

  316. {

  317.     put_buffer(pb, header_metadata_key, 13);

  318.     put_be24(pb, value);

  319. }

  320. 

  321. static void mxf_free(AVFormatContext *s)

  322. {

  323.     int i;

  324. 

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

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

  327.         av_freep(&st->priv_data);

  328.     }

  329. }

  330. 

  331. static const MXFCodecUL *mxf_get_data_definition_ul(int type)

  332. {

  333.     const MXFCodecUL *uls = ff_mxf_data_definition_uls;

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

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

  336.             break;

  337.         uls++;

  338.     }

  339.     return uls;

  340. }

  341. 

  342. static void mxf_write_essence_container_refs(AVFormatContext *s)

  343. {

  344.     MXFContext *c = s->priv_data;

  345.     ByteIOContext *pb = s->pb;

  346.     int i;

  347. 

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

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

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

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

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

  353.     }

  354. }

  355. 

  356. static void mxf_write_preface(AVFormatContext *s)

  357. {

  358.     MXFContext *mxf = s->priv_data;

  359.     ByteIOContext *pb = s->pb;

  360. 

  361.     mxf_write_metadata_key(pb, 0x012f00);

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

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

  364. 

  365.     // write preface set uid

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

  367.     mxf_write_uuid(pb, Preface, 0);

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

  369. 

  370.     // last modified date

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

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

  373. 

  374.     // write version

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

  376.     put_be16(pb, 1);

  377. 

  378.     // write identification_refs

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

  380.     mxf_write_refs_count(pb, 1);

  381.     mxf_write_uuid(pb, Identification, 0);

  382. 

  383.     // write content_storage_refs

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

  385.     mxf_write_uuid(pb, ContentStorage, 0);

  386. 

  387.     // operational pattern

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

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

  390.         put_buffer(pb, op1a_ul, 14);

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

  392.     } else {

  393.         put_buffer(pb, op1a_ul, 16);

  394.     }

  395. 

  396.     // write essence_container_refs

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

  398.     mxf_write_essence_container_refs(s);

  399. 

  400.     // write dm_scheme_refs

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

  402.     put_be64(pb, 0);

  403. }

  404. 

  405. /*

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

  407.  */

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

  409. {

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

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

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

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

  414. }

  415. 

  416. static void mxf_write_identification(AVFormatContext *s)

  417. {

  418.     MXFContext *mxf = s->priv_data;

  419.     ByteIOContext *pb = s->pb;

  420.     const char *company = "FFmpeg";

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

  422.     const char *version;

  423.     int length;

  424. 

  425.     mxf_write_metadata_key(pb, 0x013000);

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

  427. 

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

  429.         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);

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

  431.     klv_encode_ber_length(pb, length);

  432. 

  433.     // write uid

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

  435.     mxf_write_uuid(pb, Identification, 0);

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

  437. 

  438.     // write generation uid

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

  440.     mxf_write_uuid(pb, Identification, 1);

  441. 

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

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

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

  445. 

  446.     // write product uid

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

  448.     mxf_write_uuid(pb, Identification, 2);

  449. 

  450.     // modification date

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

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

  453. }

  454. 

  455. static void mxf_write_content_storage(AVFormatContext *s)

  456. {

  457.     ByteIOContext *pb = s->pb;

  458. 

  459.     mxf_write_metadata_key(pb, 0x011800);

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

  461.     klv_encode_ber_length(pb, 92);

  462. 

  463.     // write uid

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

  465.     mxf_write_uuid(pb, ContentStorage, 0);

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

  467. 

  468.     // write package reference

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

  470.     mxf_write_refs_count(pb, 2);

  471.     mxf_write_uuid(pb, MaterialPackage, 0);

  472.     mxf_write_uuid(pb, SourcePackage, 0);

  473. 

  474.     // write essence container data

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

  476.     mxf_write_refs_count(pb, 1);

  477.     mxf_write_uuid(pb, EssenceContainerData, 0);

  478. }

  479. 

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

  481. {

  482.     MXFContext *mxf = s->priv_data;

  483.     ByteIOContext *pb = s->pb;

  484.     MXFStreamContext *sc = st->priv_data;

  485. 

  486.     mxf_write_metadata_key(pb, 0x013b00);

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

  488.     klv_encode_ber_length(pb, 80);

  489. 

  490.     // write track uid

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

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

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

  494. 

  495.     // write track id

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

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

  498. 

  499.     // write track number

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

  501.     if (type == MaterialPackage)

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

  503.     else

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

  505. 

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

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

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

  509. 

  510.     // write origin

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

  512.     put_be64(pb, 0);

  513. 

  514.     // write sequence refs

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

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

  517. }

  518. 

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

  520. {

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

  522.     MXFStreamContext *sc = st->priv_data;

  523. 

  524.     // find data define uls

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

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

  527. 

  528.     // write duration

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

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

  531. }

  532. 

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

  534. {

  535.     ByteIOContext *pb = s->pb;

  536. 

  537.     mxf_write_metadata_key(pb, 0x010f00);

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

  539.     klv_encode_ber_length(pb, 80);

  540. 

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

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

  543. 

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

  545.     mxf_write_common_fields(pb, st);

  546. 

  547.     // write structural component

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

  549.     mxf_write_refs_count(pb, 1);

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

  551. }

  552. 

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

  554. {

  555.     ByteIOContext *pb = s->pb;

  556.     int i;

  557. 

  558.     mxf_write_metadata_key(pb, 0x011100);

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

  560.     klv_encode_ber_length(pb, 108);

  561. 

  562.     // write uid

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

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

  565. 

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

  567.     mxf_write_common_fields(pb, st);

  568. 

  569.     // write start_position

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

  571.     put_be64(pb, 0);

  572. 

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

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

  575.     if (type == SourcePackage) {

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

  577.             put_be64(pb, 0);

  578.     } else

  579.         mxf_write_umid(pb, SourcePackage, 0);

  580. 

  581.     // write source track id

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

  583.     if (type == SourcePackage)

  584.         put_be32(pb, 0);

  585.     else

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

  587. }

  588. 

  589. static void mxf_write_multi_descriptor(AVFormatContext *s)

  590. {

  591.     MXFContext *mxf = s->priv_data;

  592.     ByteIOContext *pb = s->pb;

  593.     int i;

  594. 

  595.     mxf_write_metadata_key(pb, 0x014400);

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

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

  598. 

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

  600.     mxf_write_uuid(pb, MultipleDescriptor, 0);

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

  602. 

  603.     // write sample rate

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

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

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

  607. 

  608.     // write essence container ul

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

  610.     put_buffer(pb, multiple_desc_ul, 16);

  611. 

  612.     // write sub descriptor refs

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

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

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

  616.         mxf_write_uuid(pb, SubDescriptor, i);

  617. }

  618. 

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

  620. {

  621.     MXFContext *mxf = s->priv_data;

  622.     MXFStreamContext *sc = st->priv_data;

  623.     ByteIOContext *pb = s->pb;

  624. 

  625.     put_buffer(pb, key, 16);

  626.     klv_encode_ber_length(pb, size);

  627. 

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

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

  630. 

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

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

  633. 

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

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

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

  637. 

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

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

  640. }

  641. 

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

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

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

  645. 

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

  647. {

  648.     MXFStreamContext *sc = st->priv_data;

  649.     ByteIOContext *pb = s->pb;

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

  651.     AVRational dar;

  652.     int f1, f2;

  653. 

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

  655. 

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

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

  658. 

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

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

  661. 

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

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

  664. 

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

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

  667. 

  668.     // component depth

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

  670.     put_be32(pb, 8);

  671. 

  672.     // horizontal subsampling

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

  674.     put_be32(pb, 2);

  675. 

  676.     // bit rate

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

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

  679. 

  680.     // frame layout

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

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

  683. 

  684.     // video line map

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

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

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

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

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

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

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

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

  693.     }

  694. 

  695.     if (!sc->interlaced) {

  696.         f2  = 0;

  697.         f1 *= 2;

  698.     }

  699. 

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

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

  702.     put_be32(pb, 4);

  703.     put_be32(pb, f1);

  704.     if (sc->interlaced)

  705.         put_be32(pb, f2);

  706. 

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

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

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

  710.               1024*1024);

  711. 

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

  713.     put_be32(pb, dar.num);

  714.     put_be32(pb, dar.den);

  715. 

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

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

  718. }

  719. 

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

  721. {

  722.     ByteIOContext *pb = s->pb;

  723. 

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

  725. 

  726.     // audio locked

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

  728.     put_byte(pb, 1);

  729. 

  730.     // write audio sampling rate

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

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

  733.     put_be32(pb, 1);

  734. 

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

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

  737. 

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

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

  740. }

  741. 

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

  743. {

  744.     ByteIOContext *pb = s->pb;

  745. 

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

  747. 

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

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

  750. 

  751.     // avg bytes per sec

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

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

  754. }

  755. 

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

  757. {

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

  759. }

  760. 

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

  762. {

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

  764. }

  765. 

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

  767. {

  768.     MXFContext *mxf = s->priv_data;

  769.     ByteIOContext *pb = s->pb;

  770.     int i;

  771. 

  772.     if (type == MaterialPackage) {

  773.         mxf_write_metadata_key(pb, 0x013600);

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

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

  776.     } else {

  777.         mxf_write_metadata_key(pb, 0x013700);

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

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

  780.     }

  781. 

  782.     // write uid

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

  784.     mxf_write_uuid(pb, type, 0);

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

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

  787. 

  788.     // write package umid

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

  790.     mxf_write_umid(pb, type, 0);

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

  792. 

  793.     // package creation date

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

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

  796. 

  797.     // package modified date

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

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

  800. 

  801.     // write track refs

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

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

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

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

  806. 

  807.     // write multiple descriptor reference

  808.     if (type == SourcePackage) {

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

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

  811.             mxf_write_uuid(pb, MultipleDescriptor, 0);

  812.             mxf_write_multi_descriptor(s);

  813.         } else

  814.             mxf_write_uuid(pb, SubDescriptor, 0);

  815.     }

  816. 

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

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

  819.         mxf_write_track(s, st, type);

  820.         mxf_write_sequence(s, st, type);

  821.         mxf_write_structural_component(s, st, type);

  822. 

  823.         if (type == SourcePackage) {

  824.             MXFStreamContext *sc = st->priv_data;

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

  826.         }

  827.     }

  828. }

  829. 

  830. static int mxf_write_essence_container_data(AVFormatContext *s)

  831. {

  832.     ByteIOContext *pb = s->pb;

  833. 

  834.     mxf_write_metadata_key(pb, 0x012300);

  835.     klv_encode_ber_length(pb, 72);

  836. 

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

  838.     mxf_write_uuid(pb, EssenceContainerData, 0);

  839. 

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

  841.     mxf_write_umid(pb, SourcePackage, 0);

  842. 

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

  844.     put_be32(pb, 1);

  845. 

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

  847.     put_be32(pb, 2);

  848. 

  849.     return 0;

  850. }

  851. 

  852. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  853. {

  854.     mxf_write_preface(s);

  855.     mxf_write_identification(s);

  856.     mxf_write_content_storage(s);

  857.     mxf_write_package(s, MaterialPackage);

  858.     mxf_write_package(s, SourcePackage);

  859.     mxf_write_essence_container_data(s);

  860.     return 0;

  861. }

  862. 

  863. static unsigned klv_fill_size(uint64_t size)

  864. {

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

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

  867.         return pad + KAG_SIZE;

  868.     else

  869.         return pad & (KAG_SIZE-1);

  870. }

  871. 

  872. static void mxf_write_index_table_segment(AVFormatContext *s)

  873. {

  874.     MXFContext *mxf = s->priv_data;

  875.     ByteIOContext *pb = s->pb;

  876.     int i, j;

  877.     int temporal_reordering = 0;

  878.     int last_key_index = 0, key_index = 0;

  879. 

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

  881. 

  882.     put_buffer(pb, index_table_segment_key, 16);

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

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

  885. 

  886.     // instance id

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

  888.     mxf_write_uuid(pb, IndexTableSegment, 0);

  889. 

  890.     // index edit rate

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

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

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

  894. 

  895.     // index start position

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

  897.     put_be64(pb, 0);

  898. 

  899.     // index duration

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

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

  902. 

  903.     // edit unit byte count

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

  905.     put_be32(pb, 0);

  906. 

  907.     // index sid

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

  909.     put_be32(pb, 2);

  910. 

  911.     // body sid

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

  913.     put_be32(pb, 1);

  914. 

  915.     // real slice count - 1

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

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

  918. 

  919.     // delta entry array

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

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

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

  923.     // write system item delta entry

  924.     put_byte(pb, 0);

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

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

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

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

  929.         MXFStreamContext *sc = st->priv_data;

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

  931.         if (sc->temporal_reordering)

  932.             temporal_reordering = 1;

  933.         // slice number

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

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

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

  937.         } else { // audio track

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

  939.             audio_frame_size += klv_fill_size(audio_frame_size);

  940.             put_byte(pb, 1);

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

  942.         }

  943.     }

  944. 

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

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

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

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

  949.         if (temporal_reordering) {

  950.             int temporal_offset = 0;

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

  952.                 temporal_offset++;

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

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

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

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

  957.                             temporal_offset = 0;

  958.                         else

  959.                             temporal_offset = -temporal_offset;

  960.                     }

  961.                     break;

  962.                 }

  963.             }

  964.             put_byte(pb, temporal_offset);

  965.         } else

  966.             put_byte(pb, 0);

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

  968.             last_key_index = key_index;

  969.             key_index = i;

  970.         }

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

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

  973.             put_byte(pb, last_key_index - i);

  974.         } else {

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

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

  977.                 last_key_index = key_index;

  978.         }

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

  980.         // stream offset

  981.         put_be64(pb, mxf->index_entries[i].offset - mxf->index_entries[0].offset);

  982.         if (s->nb_streams > 1)

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

  984.     }

  985. }

  986. 

  987. static void mxf_write_klv_fill(AVFormatContext *s)

  988. {

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

  990.     if (pad) {

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

  992.         pad -= 16;

  993.         pad -= klv_ber_length(pad);

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

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

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

  997.         for (; pad; pad--)

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

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

  1000.     }

  1001. }

  1002. 

  1003. static void mxf_write_partition(AVFormatContext *s, int bodysid,

  1004.                                 int indexsid, unsigned index_byte_count,

  1005.                                 const uint8_t *key, int write_metadata)

  1006. {

  1007.     MXFContext *mxf = s->priv_data;

  1008.     ByteIOContext *pb = s->pb;

  1009.     int64_t header_byte_count_offset;

  1010. 

  1011.     // write klv

  1012.     put_buffer(pb, key, 16);

  1013. 

  1014.     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);

  1015. 

  1016.     // write partition value

  1017.     put_be16(pb, 1); // majorVersion

  1018.     put_be16(pb, 2); // minorVersion

  1019.     put_be32(pb, KAG_SIZE); // KAGSize

  1020. 

  1021.     put_be64(pb, url_ftell(pb) - 25); // thisPartition

  1022.     put_be64(pb, 0); // previousPartition

  1023. 

  1024.     put_be64(pb, mxf->footer_partition_offset); // footerPartition

  1025. 

  1026.     // set offset

  1027.     header_byte_count_offset = url_ftell(pb);

  1028.     put_be64(pb, 0); // headerByteCount, update later

  1029. 

  1030.     // indexTable

  1031.     put_be64(pb, index_byte_count); // indexByteCount

  1032.     put_be32(pb, indexsid); // indexSID

  1033.     put_be64(pb, 0); // bodyOffset

  1034. 

  1035.     put_be32(pb, bodysid); // bodySID

  1036. 

  1037.     // operational pattern

  1038.     if (s->nb_streams > 1) {

  1039.         put_buffer(pb, op1a_ul, 14);

  1040.         put_be16(pb, 0x0900); // multi track

  1041.     } else {

  1042.         put_buffer(pb, op1a_ul, 16);

  1043.     }

  1044. 

  1045.     // essence container

  1046.     mxf_write_essence_container_refs(s);

  1047. 

  1048.     if (write_metadata) {

  1049.         // mark the start of the headermetadata and calculate metadata size

  1050.         int64_t pos, start;

  1051.         unsigned header_byte_count;

  1052. 

  1053.         mxf_write_klv_fill(s);

  1054.         start = url_ftell(s->pb);

  1055.         mxf_write_primer_pack(s);

  1056.         mxf_write_header_metadata_sets(s);

  1057.         pos = url_ftell(s->pb);

  1058.         header_byte_count = pos - start + klv_fill_size(pos);

  1059. 

  1060.         // update header_byte_count

  1061.         url_fseek(pb, header_byte_count_offset, SEEK_SET);

  1062.         put_be64(pb, header_byte_count);

  1063.         url_fseek(pb, pos, SEEK_SET);

  1064.     }

  1065. 

  1066.     put_flush_packet(pb);

  1067. }

  1068. 

  1069. static const UID mxf_mpeg2_codec_uls[] = {

  1070.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame

  1071.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP

  1072.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame

  1073.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP

  1074.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame

  1075.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP

  1076.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame

  1077.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP

  1078. };

  1079. 

  1080. static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)

  1081. {

  1082.     if (avctx->profile == 4) { // Main

  1083.         if (avctx->level == 8) // Main

  1084.             return avctx->gop_size ?

  1085.                 &mxf_mpeg2_codec_uls[1] :

  1086.                 &mxf_mpeg2_codec_uls[0];

  1087.         else if (avctx->level == 4) // High

  1088.             return avctx->gop_size ?

  1089.                 &mxf_mpeg2_codec_uls[5] :

  1090.                 &mxf_mpeg2_codec_uls[4];

  1091.     } else if (avctx->profile == 0) { // 422

  1092.         if (avctx->level == 5) // Main

  1093.             return avctx->gop_size ?

  1094.                 &mxf_mpeg2_codec_uls[3] :

  1095.                 &mxf_mpeg2_codec_uls[2];

  1096.         else if (avctx->level == 2) // High

  1097.             return avctx->gop_size ?

  1098.                 &mxf_mpeg2_codec_uls[7] :

  1099.                 &mxf_mpeg2_codec_uls[6];

  1100.     }

  1101.     return NULL;

  1102. }

  1103. 

  1104. static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)

  1105. {

  1106.     MXFContext *mxf = s->priv_data;

  1107.     MXFStreamContext *sc = st->priv_data;

  1108.     uint32_t c = -1;

  1109.     int i;

  1110. 

  1111.     mxf->index_entries[mxf->edit_units_count].flags = 0;

  1112. 

  1113.     for(i = 0; i < pkt->size - 4; i++) {

  1114.         c = (c<<8) + pkt->data[i];

  1115.         if (c == 0x1B5) {

  1116.             if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext

  1117.                 st->codec->profile = pkt->data[i+1] & 0x07;

  1118.                 st->codec->level   = pkt->data[i+2] >> 4;

  1119.             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext

  1120.                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame

  1121.                 break;

  1122.             }

  1123.         } else if (c == 0x1b8) { // gop

  1124.             if (i + 4 < pkt->size && pkt->data[i+4]>>6 & 0x01) // closed

  1125.                 mxf->index_entries[mxf->edit_units_count].flags |= 0x80; // random access

  1126.         } else if (c == 0x1b3) { // seq

  1127.             mxf->index_entries[mxf->edit_units_count].flags |= 0x40;

  1128.         } else if (c == 0x100) { // pic

  1129.             int pict_type = (pkt->data[i+2]>>3) & 0x07;

  1130.             if (pict_type == 2) { // P frame

  1131.                 mxf->index_entries[mxf->edit_units_count].flags |= 0x22;

  1132.                 st->codec->gop_size = 1;

  1133.             } else if (pict_type == 3) { // B frame

  1134.                 mxf->index_entries[mxf->edit_units_count].flags |= 0x33;

  1135.                 sc->temporal_reordering = -1;

  1136.             } else if (!pict_type) {

  1137.                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");

  1138.                 return 0;

  1139.             }

  1140.         }

  1141.     }

  1142.     sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);

  1143.     return !!sc->codec_ul;

  1144. }

  1145. 

  1146. static uint64_t mxf_parse_timestamp(time_t timestamp)

  1147. {

  1148.     struct tm *time = localtime(&timestamp);

  1149.     return (uint64_t)(time->tm_year+1900) << 48 |

  1150.            (uint64_t)(time->tm_mon+1)     << 40 |

  1151.            (uint64_t) time->tm_mday       << 32 |

  1152.                       time->tm_hour       << 24 |

  1153.                       time->tm_min        << 16 |

  1154.                       time->tm_sec        << 8;

  1155. }

  1156. 

  1157. static int mxf_write_header(AVFormatContext *s)

  1158. {

  1159.     MXFContext *mxf = s->priv_data;

  1160.     int i;

  1161.     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};

  1162.     const int *samples_per_frame = NULL;

  1163. 

  1164.     if (s->nb_streams > 17) {

  1165.         av_log(s, AV_LOG_ERROR, "error, mxf muxer supports 17 tracks maximum\n");

  1166.         return -1;

  1167.     }

  1168. 

  1169.     for (i = 0; i < s->nb_streams; i++) {

  1170.         AVStream *st = s->streams[i];

  1171.         MXFStreamContext *sc = av_mallocz(sizeof(*sc));

  1172.         if (!sc)

  1173.             return AVERROR(ENOMEM);

  1174.         st->priv_data = sc;

  1175. 

  1176.         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {

  1177.             if (i != 0) {

  1178.                 av_log(s, AV_LOG_ERROR, "video stream must be first track\n");

  1179.                 return -1;

  1180.             }

  1181.             if (fabs(av_q2d(st->codec->time_base) - 1/25.0) < 0.0001) {

  1182.                 samples_per_frame = PAL_samples_per_frame;

  1183.                 mxf->time_base = (AVRational){ 1, 25 };

  1184.             } else if (fabs(av_q2d(st->codec->time_base) - 1001/30000.0) < 0.0001) {

  1185.                 samples_per_frame = NTSC_samples_per_frame;

  1186.                 mxf->time_base = (AVRational){ 1001, 30000 };

  1187.             } else {

  1188.                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");

  1189.                 return -1;

  1190.             }

  1191.             av_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);

  1192.         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {

  1193.             if (st->codec->sample_rate != 48000) {

  1194.                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");

  1195.                 return -1;

  1196.             }

  1197.             av_set_pts_info(st, 64, 1, st->codec->sample_rate);

  1198.             mxf->slice_count = 1;

  1199.         }

  1200.         sc->duration = -1;

  1201. 

  1202.         sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);

  1203.         if (sc->index == -1) {

  1204.             av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "

  1205.                    "codec not currently supported in container\n", i);

  1206.             return -1;

  1207.         }

  1208. 

  1209.         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;

  1210. 

  1211.         if (!present[sc->index]) {

  1212.             mxf->essence_containers_indices[mxf->essence_container_count++] = sc->index;

  1213.             present[sc->index] = 1;

  1214.         } else

  1215.             present[sc->index]++;

  1216.         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);

  1217.         sc->track_essence_element_key[15] = present[sc->index];

  1218.         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);

  1219.     }

  1220. 

  1221.     for (i = 0; i < s->nb_streams; i++) {

  1222.         MXFStreamContext *sc = s->streams[i]->priv_data;

  1223.         // update element count

  1224.         sc->track_essence_element_key[13] = present[sc->index];

  1225.         sc->order = AV_RB32(sc->track_essence_element_key+12);

  1226.     }

  1227. 

  1228.     mxf->timestamp = mxf_parse_timestamp(s->timestamp);

  1229. 

  1230.     if (!samples_per_frame)

  1231.         samples_per_frame = PAL_samples_per_frame;

  1232. 

  1233.     if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)

  1234.         return -1;

  1235. 

  1236.     return 0;

  1237. }

  1238. 

  1239. static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };

  1240. 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 };

  1241. 

  1242. static uint32_t ff_framenum_to_12m_time_code(unsigned frame, int drop, int fps)

  1243. {

  1244.     return (0                                    << 31) | // color frame flag

  1245.            (0                                    << 30) | // drop  frame flag

  1246.            ( ((frame % fps) / 10)                << 28) | // tens  of frames

  1247.            ( ((frame % fps) % 10)                << 24) | // units of frames

  1248.            (0                                    << 23) | // field phase (NTSC), b0 (PAL)

  1249.            ((((frame / fps) % 60) / 10)          << 20) | // tens  of seconds

  1250.            ((((frame / fps) % 60) % 10)          << 16) | // units of seconds

  1251.            (0                                    << 15) | // b0 (NTSC), b2 (PAL)

  1252.            ((((frame / (fps * 60)) % 60) / 10)   << 12) | // tens  of minutes

  1253.            ((((frame / (fps * 60)) % 60) % 10)   <<  8) | // units of minutes

  1254.            (0                                    <<  7) | // b1

  1255.            (0                                    <<  6) | // b2 (NSC), field phase (PAL)

  1256.            ((((frame / (fps * 3600) % 24)) / 10) <<  4) | // tens  of hours

  1257.            (  (frame / (fps * 3600) % 24)) % 10;          // units of hours

  1258. }

  1259. 

  1260. static void mxf_write_system_item(AVFormatContext *s)

  1261. {

  1262.     MXFContext *mxf = s->priv_data;

  1263.     ByteIOContext *pb = s->pb;

  1264.     unsigned fps, frame;

  1265.     uint32_t time_code;

  1266. 

  1267.     frame = mxf->edit_units_count;

  1268. 

  1269.     // write system metadata pack

  1270.     put_buffer(pb, system_metadata_pack_key, 16);

  1271.     klv_encode_ber_length(pb, 57);

  1272.     put_byte(pb, 0x5c); // UL, user date/time stamp, picture and sound item present

  1273.     put_byte(pb, 0x04); // content package rate

  1274.     put_byte(pb, 0x00); // content package type

  1275.     put_be16(pb, 0x00); // channel handle

  1276.     put_be16(pb, frame); // continuity count

  1277.     if (mxf->essence_container_count > 1)

  1278.         put_buffer(pb, multiple_desc_ul, 16);

  1279.     else

  1280.         put_buffer(pb, mxf_essence_container_uls[mxf->essence_containers_indices[0]].container_ul, 16);

  1281.     put_byte(pb, 0);

  1282.     put_be64(pb, 0);

  1283.     put_be64(pb, 0); // creation date/time stamp

  1284. 

  1285.     // XXX drop frame

  1286.     if (mxf->time_base.den == 30000) fps = 30;

  1287.     else                             fps = 25;

  1288. 

  1289.     put_byte(pb, 0x81); // SMPTE 12M time code

  1290.     time_code = ff_framenum_to_12m_time_code(frame, 0, fps);

  1291.     put_be32(pb, time_code);

  1292.     put_be32(pb, 0); // binary group data

  1293.     put_be64(pb, 0);

  1294. 

  1295.     // write system metadata package set

  1296.     put_buffer(pb, system_metadata_package_set_key, 16);

  1297.     klv_encode_ber_length(pb, 35);

  1298.     put_byte(pb, 0x83); // UMID

  1299.     put_be16(pb, 0x20);

  1300.     mxf_write_umid(pb, SourcePackage, 0);

  1301. }

  1302. 

  1303. static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)

  1304. {

  1305.     MXFContext *mxf = s->priv_data;

  1306.     ByteIOContext *pb = s->pb;

  1307.     AVStream *st = s->streams[pkt->stream_index];

  1308.     MXFStreamContext *sc = st->priv_data;

  1309. 

  1310.     if (!(mxf->edit_units_count % MXF_INDEX_CLUSTER_SIZE)) {

  1311.         mxf->index_entries = av_realloc(mxf->index_entries,

  1312.             (mxf->edit_units_count + MXF_INDEX_CLUSTER_SIZE)*

  1313.              sizeof(*mxf->index_entries));

  1314.         if (!mxf->index_entries) {

  1315.             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");

  1316.             return -1;

  1317.         }

  1318.     }

  1319. 

  1320.     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {

  1321.         if (!mxf_parse_mpeg2_frame(s, st, pkt)) {

  1322.             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");

  1323.             return -1;

  1324.         }

  1325.     }

  1326. 

  1327.     if (!mxf->header_written) {

  1328.         mxf_write_partition(s, 1, 0, 0, header_open_partition_key, 1);

  1329.         mxf->header_written = 1;

  1330.     }

  1331. 

  1332.     if (st->index == 0) {

  1333.         mxf_write_klv_fill(s);

  1334.         mxf->index_entries[mxf->edit_units_count].offset = url_ftell(pb);

  1335.         mxf_write_system_item(s);

  1336. 

  1337.         mxf->edit_units_count++;

  1338.     } else if (st->index == 1) {

  1339.         mxf->index_entries[mxf->edit_units_count-1].slice_offset =

  1340.             url_ftell(pb) - mxf->index_entries[mxf->edit_units_count-1].offset;

  1341.     }

  1342. 

  1343.     mxf_write_klv_fill(s);

  1344.     put_buffer(pb, sc->track_essence_element_key, 16); // write key

  1345.     klv_encode_ber_length(pb, pkt->size); // write length

  1346.     put_buffer(pb, pkt->data, pkt->size); // write value

  1347. 

  1348.     sc->duration = FFMAX(pkt->pts + pkt->duration, sc->duration);

  1349. 

  1350.     put_flush_packet(pb);

  1351.     return 0;

  1352. }

  1353. 

  1354. static void mxf_write_random_index_pack(AVFormatContext *s)

  1355. {

  1356.     MXFContext *mxf = s->priv_data;

  1357.     ByteIOContext *pb = s->pb;

  1358.     uint64_t pos = url_ftell(pb);

  1359. 

  1360.     put_buffer(pb, random_index_pack_key, 16);

  1361.     klv_encode_ber_length(pb, 28);

  1362. 

  1363.     put_be32(pb, 1); // BodySID of header partition

  1364.     put_be64(pb, 0); // offset of header partition

  1365. 

  1366.     put_be32(pb, 0); // BodySID of footer partition

  1367.     put_be64(pb, mxf->footer_partition_offset);

  1368. 

  1369.     put_be32(pb, url_ftell(pb) - pos + 4);

  1370. }

  1371. 

  1372. static int mxf_write_footer(AVFormatContext *s)

  1373. {

  1374.     MXFContext *mxf = s->priv_data;

  1375.     ByteIOContext *pb = s->pb;

  1376.     unsigned index_byte_count =

  1377.         109 + (s->nb_streams+1)*6 +

  1378.         mxf->edit_units_count*(11+mxf->slice_count*4);

  1379. 

  1380.     // add encoded ber length

  1381.     index_byte_count += 16 + klv_ber_length(index_byte_count);

  1382.     index_byte_count += klv_fill_size(index_byte_count);

  1383. 

  1384.     mxf_write_klv_fill(s);

  1385.     mxf->footer_partition_offset = url_ftell(pb);

  1386.     mxf_write_partition(s, 0, 2, index_byte_count, footer_partition_key, 0);

  1387. 

  1388.     mxf_write_klv_fill(s);

  1389.     mxf_write_index_table_segment(s);

  1390. 

  1391.     mxf_write_klv_fill(s);

  1392.     mxf_write_random_index_pack(s);

  1393. 

  1394.     if (!url_is_streamed(s->pb)) {

  1395.         url_fseek(pb, 0, SEEK_SET);

  1396.         mxf_write_partition(s, 1, 0, 0, header_closed_partition_key, 1);

  1397.     }

  1398. 

  1399.     ff_audio_interleave_close(s);

  1400. 

  1401.     av_freep(&mxf->index_entries);

  1402. 

  1403.     mxf_free(s);

  1404.     return 0;

  1405. }

  1406. 

  1407. static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  1408. {

  1409.     AVPacketList *pktl;

  1410.     int stream_count = 0;

  1411.     int streams[MAX_STREAMS];

  1412. 

  1413.     memset(streams, 0, sizeof(streams));

  1414.     pktl = s->packet_buffer;

  1415.     while (pktl) {

  1416.         //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);

  1417.         if (!streams[pktl->pkt.stream_index])

  1418.             stream_count++;

  1419.         streams[pktl->pkt.stream_index]++;

  1420.         pktl = pktl->next;

  1421.     }

  1422. 

  1423.     if (stream_count && (s->nb_streams == stream_count || flush)) {

  1424.         pktl = s->packet_buffer;

  1425.         if (s->nb_streams != stream_count) {

  1426.             AVPacketList *first = NULL;

  1427.             // find first packet in edit unit

  1428.             while (pktl) {

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

  1430.                 if (st->index == 0)

  1431.                     break;

  1432.                 else if (!first)

  1433.                     first = pktl;

  1434.                 pktl = pktl->next;

  1435.             }

  1436.             // purge packet queue

  1437.             while (pktl) {

  1438.                 AVPacketList *next = pktl->next;

  1439.                 av_free_packet(&pktl->pkt);

  1440.                 av_freep(&pktl);

  1441.                 pktl = next;

  1442.             }

  1443.             if (!first)

  1444.                 goto out;

  1445.             pktl = first;

  1446.         }

  1447. 

  1448.         *out = pktl->pkt;

  1449.         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);

  1450.         s->packet_buffer = pktl->next;

  1451.         av_freep(&pktl);

  1452.         return 1;

  1453.     } else {

  1454.     out:

  1455.         av_init_packet(out);

  1456.         return 0;

  1457.     }

  1458. }

  1459. 

  1460. static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)

  1461. {

  1462.     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;

  1463.     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;

  1464. 

  1465.     return next->dts > pkt->dts ||

  1466.         (next->dts == pkt->dts && sc->order < sc2->order);

  1467. }

  1468. 

  1469. static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  1470. {

  1471.     return ff_audio_rechunk_interleave(s, out, pkt, flush,

  1472.                                mxf_interleave_get_packet, mxf_compare_timestamps);

  1473. }

  1474. 

  1475. AVOutputFormat mxf_muxer = {

  1476.     "mxf",

  1477.     NULL_IF_CONFIG_SMALL("Material eXchange Format"),

  1478.     NULL,

  1479.     "mxf",

  1480.     sizeof(MXFContext),

  1481.     CODEC_ID_PCM_S16LE,

  1482.     CODEC_ID_MPEG2VIDEO,

  1483.     mxf_write_header,

  1484.     mxf_write_packet,

  1485.     mxf_write_footer,

  1486.     AVFMT_NOTIMESTAMPS,

  1487.     NULL,

  1488.     mxf_interleave,

  1489. };