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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 "libavutil/fifo.h"

  36. #include "mxf.h"

  37. 

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

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

  40. 

  41. typedef struct {

  42.     AVFifoBuffer fifo;

  43.     unsigned fifo_size;           ///< current fifo size allocated

  44.     uint64_t dts;                 ///< current dts

  45.     int sample_size;              ///< size of one sample all channels included

  46.     const int *samples_per_frame; ///< must be 0 terminated

  47.     const int *samples;           ///< current samples per frame, pointer to samples_per_frame

  48. } AudioInterleaveContext;

  49. 

  50. typedef struct {

  51.     int local_tag;

  52.     UID uid;

  53. } MXFLocalTagPair;

  54. 

  55. typedef struct {

  56.     AudioInterleaveContext aic;

  57.     UID track_essence_element_key;

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

  59.     const UID *codec_ul;

  60.     int64_t duration;

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

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

  63. } MXFStreamContext;

  64. 

  65. typedef struct {

  66.     UID container_ul;

  67.     UID element_ul;

  68.     UID codec_ul;

  69.     enum CodecID id;

  70.     void (*write_desc)();

  71. } MXFContainerEssenceEntry;

  72. 

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

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

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

  76. 

  77. static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {

  78.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },

  79.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },

  80.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },

  81.       CODEC_ID_MPEG2VIDEO, mxf_write_mpegvideo_desc },

  82.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },

  83.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },

  84.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  85.       CODEC_ID_PCM_S16LE, mxf_write_aes3_desc },

  86.     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },

  87.       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },

  88.       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },

  89.       CODEC_ID_PCM_S16LE, mxf_write_wav_desc },

  90.     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  91.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  92.       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },

  93.       CODEC_ID_NONE, NULL },

  94. };

  95. 

  96. typedef struct MXFContext {

  97.     int64_t footer_partition_offset;

  98.     int essence_container_count;

  99.     uint8_t essence_containers_indices[FF_ARRAY_ELEMS(mxf_essence_container_uls)];

  100.     AVRational time_base;

  101.     int header_written;

  102. } MXFContext;

  103. 

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

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

  106. 

  107. /**

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

  109.  */

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

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

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

  113. 

  114. 

  115. 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

  116. 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

  117. 

  118. /**

  119.  * partial key for header metadata

  120.  */

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

  122. 

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

  124. 

  125. /**

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

  127.  */

  128. static const MXFLocalTagPair mxf_local_tag_batch[] = {

  129.     // preface set

  130.     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */

  131.     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */

  132.     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */

  133.     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */

  134.     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */

  135.     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */

  136.     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */

  137.     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */

  138.     // Identification

  139.     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */

  140.     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */

  141.     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */

  142.     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */

  143.     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */

  144.     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */

  145.     // Content Storage

  146.     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */

  147.     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */

  148.     // Essence Container Data

  149.     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */

  150.     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */

  151.     // Package

  152.     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */

  153.     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */

  154.     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */

  155.     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */

  156.     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */

  157.     // Track

  158.     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */

  159.     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */

  160.     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */

  161.     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */

  162.     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */

  163.     // Sequence

  164.     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */

  165.     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */

  166.     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */

  167.     // Source Clip

  168.     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */

  169.     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */

  170.     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */

  171.     // File Descriptor

  172.     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */

  173.     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */

  174.     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */

  175.     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */

  176.     // Generic Picture Essence Descriptor

  177.     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */

  178.     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */

  179.     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */

  180.     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */

  181.     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */

  182.     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */

  183.     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */

  184.     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */

  185.     // Generic Sound Essence Descriptor

  186.     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */

  187.     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */

  188.     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */

  189.     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */

  190.     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */

  191.     // MPEG video Descriptor

  192.     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */

  193.     // Wave Audio Essence Descriptor

  194.     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */

  195.     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */

  196. };

  197. 

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

  199. {

  200.     put_buffer(pb, uuid_base, 12);

  201.     put_be16(pb, type);

  202.     put_be16(pb, value);

  203. }

  204. 

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

  206. {

  207.     put_buffer(pb, umid_base, 16);

  208.     mxf_write_uuid(pb, type, value);

  209. }

  210. 

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

  212. {

  213.     put_be32(pb, ref_count);

  214.     put_be32(pb, 16);

  215. }

  216. 

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

  218. {

  219.     // Determine the best BER size

  220.     int size;

  221.     if (len < 128) {

  222.         //short form

  223.         put_byte(pb, len);

  224.         return 1;

  225.     }

  226. 

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

  228. 

  229.     // long form

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

  231.     while(size) {

  232.         size --;

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

  234.     }

  235.     return 0;

  236. }

  237. 

  238. /*

  239.  * Get essence container ul index

  240.  */

  241. static int mxf_get_essence_container_ul_index(enum CodecID id)

  242. {

  243.     int i;

  244.     for (i = 0; i < FF_ARRAY_ELEMS(mxf_essence_container_uls); i++)

  245.         if (mxf_essence_container_uls[i].id == id)

  246.             return i;

  247.     return -1;

  248. }

  249. 

  250. static void mxf_write_primer_pack(AVFormatContext *s)

  251. {

  252.     ByteIOContext *pb = s->pb;

  253.     int local_tag_number, i = 0;

  254. 

  255.     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);

  256. 

  257.     put_buffer(pb, primer_pack_key, 16);

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

  259. 

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

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

  262. 

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

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

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

  266.     }

  267. }

  268. 

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

  270. {

  271.     put_be16(pb, tag);

  272.     put_be16(pb, size);

  273. }

  274. 

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

  276. {

  277.     put_buffer(pb, header_metadata_key, 13);

  278.     put_be24(pb, value);

  279. }

  280. 

  281. static void mxf_free(AVFormatContext *s)

  282. {

  283.     int i;

  284. 

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

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

  287.         av_freep(&st->priv_data);

  288.     }

  289. }

  290. 

  291. static const MXFDataDefinitionUL *mxf_get_data_definition_ul(enum CodecType type)

  292. {

  293.     const MXFDataDefinitionUL *uls = ff_mxf_data_definition_uls;

  294.     while (uls->type != CODEC_TYPE_DATA) {

  295.         if (type == uls->type)

  296.             break;

  297.         uls++;

  298.     }

  299.     return uls;

  300. }

  301. 

  302. static void mxf_write_essence_container_refs(AVFormatContext *s)

  303. {

  304.     MXFContext *c = s->priv_data;

  305.     ByteIOContext *pb = s->pb;

  306.     int i;

  307. 

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

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

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

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

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

  313.     }

  314. }

  315. 

  316. static void mxf_write_preface(AVFormatContext *s)

  317. {

  318.     MXFContext *mxf = s->priv_data;

  319.     ByteIOContext *pb = s->pb;

  320. 

  321.     mxf_write_metadata_key(pb, 0x012f00);

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

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

  324. 

  325.     // write preface set uid

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

  327.     mxf_write_uuid(pb, Preface, 0);

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

  329. 

  330.     // write create date as unknown

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

  332.     put_be64(pb, 0);

  333. 

  334.     // write version

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

  336.     put_be16(pb, 1);

  337. 

  338.     // write identification_refs

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

  340.     mxf_write_refs_count(pb, 1);

  341.     mxf_write_uuid(pb, Identification, 0);

  342. 

  343.     // write content_storage_refs

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

  345.     mxf_write_uuid(pb, ContentStorage, 0);

  346. 

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

  348.     put_buffer(pb, op1a_ul, 16);

  349. 

  350.     // write essence_container_refs

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

  352.     mxf_write_essence_container_refs(s);

  353. 

  354.     // write dm_scheme_refs

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

  356.     put_be64(pb, 0);

  357. }

  358. 

  359. /*

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

  361.  */

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

  363. {

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

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

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

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

  368. }

  369. 

  370. static void mxf_write_identification(AVFormatContext *s)

  371. {

  372.     ByteIOContext *pb = s->pb;

  373.     const char *company = "FFmpeg";

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

  375.     const char *version;

  376.     int length;

  377. 

  378.     mxf_write_metadata_key(pb, 0x013000);

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

  380. 

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

  382.         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);

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

  384.     klv_encode_ber_length(pb, length);

  385. 

  386.     // write uid

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

  388.     mxf_write_uuid(pb, Identification, 0);

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

  390. 

  391.     // write generation uid

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

  393.     mxf_write_uuid(pb, Identification, 1);

  394. 

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

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

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

  398. 

  399.     // write product uid

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

  401.     mxf_write_uuid(pb, Identification, 2);

  402. 

  403.     // write modified date

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

  405.     put_be64(pb, 0);

  406. }

  407. 

  408. static void mxf_write_content_storage(AVFormatContext *s)

  409. {

  410.     ByteIOContext *pb = s->pb;

  411. 

  412.     mxf_write_metadata_key(pb, 0x011800);

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

  414.     klv_encode_ber_length(pb, 92);

  415. 

  416.     // write uid

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

  418.     mxf_write_uuid(pb, ContentStorage, 0);

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

  420. 

  421.     // write package reference

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

  423.     mxf_write_refs_count(pb, 2);

  424.     mxf_write_uuid(pb, MaterialPackage, 0);

  425.     mxf_write_uuid(pb, SourcePackage, 0);

  426. 

  427.     // write essence container data

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

  429.     mxf_write_refs_count(pb, 1);

  430.     mxf_write_uuid(pb, EssenceContainerData, 0);

  431. }

  432. 

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

  434. {

  435.     ByteIOContext *pb = s->pb;

  436.     MXFStreamContext *sc = st->priv_data;

  437. 

  438.     mxf_write_metadata_key(pb, 0x013b00);

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

  440.     klv_encode_ber_length(pb, 80);

  441. 

  442.     // write track uid

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

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

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

  446. 

  447.     // write track id

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

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

  450. 

  451.     // write track number

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

  453.     if (type == MaterialPackage)

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

  455.     else

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

  457. 

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

  459.     put_be32(pb, st->time_base.den);

  460.     put_be32(pb, st->time_base.num);

  461. 

  462.     // write origin

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

  464.     put_be64(pb, 0);

  465. 

  466.     // write sequence refs

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

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

  469. }

  470. 

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

  472. {

  473.     const MXFDataDefinitionUL *data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);

  474.     MXFStreamContext *sc = st->priv_data;

  475. 

  476.     // find data define uls

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

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

  479. 

  480.     // write duration

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

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

  483. }

  484. 

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

  486. {

  487.     ByteIOContext *pb = s->pb;

  488. 

  489.     mxf_write_metadata_key(pb, 0x010f00);

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

  491.     klv_encode_ber_length(pb, 80);

  492. 

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

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

  495. 

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

  497.     mxf_write_common_fields(pb, st);

  498. 

  499.     // write structural component

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

  501.     mxf_write_refs_count(pb, 1);

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

  503. }

  504. 

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

  506. {

  507.     ByteIOContext *pb = s->pb;

  508.     int i;

  509. 

  510.     mxf_write_metadata_key(pb, 0x011100);

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

  512.     klv_encode_ber_length(pb, 108);

  513. 

  514.     // write uid

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

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

  517. 

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

  519.     mxf_write_common_fields(pb, st);

  520. 

  521.     // write start_position

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

  523.     put_be64(pb, 0);

  524. 

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

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

  527.     if (type == SourcePackage) {

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

  529.             put_be64(pb, 0);

  530.     } else

  531.         mxf_write_umid(pb, SourcePackage, 0);

  532. 

  533.     // write source track id

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

  535.     if (type == SourcePackage)

  536.         put_be32(pb, 0);

  537.     else

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

  539. }

  540. 

  541. static void mxf_write_multi_descriptor(AVFormatContext *s)

  542. {

  543.     ByteIOContext *pb = s->pb;

  544.     int i;

  545. 

  546.     mxf_write_metadata_key(pb, 0x014400);

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

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

  549. 

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

  551.     mxf_write_uuid(pb, MultipleDescriptor, 0);

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

  553. 

  554.     // write sample rate

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

  556.     put_be32(pb, s->streams[0]->time_base.den);

  557.     put_be32(pb, s->streams[0]->time_base.num);

  558. 

  559.     // write essence container ul

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

  561.     put_buffer(pb, multiple_desc_ul, 16);

  562. 

  563.     // write sub descriptor refs

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

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

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

  567.         mxf_write_uuid(pb, SubDescriptor, i);

  568. }

  569. 

  570. static void mxf_write_generic_desc(ByteIOContext *pb, AVStream *st, const UID key, unsigned size)

  571. {

  572.     MXFStreamContext *sc = st->priv_data;

  573. 

  574.     put_buffer(pb, key, 16);

  575.     klv_encode_ber_length(pb, size);

  576. 

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

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

  579. 

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

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

  582. 

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

  584.     put_be32(pb, st->time_base.den);

  585.     put_be32(pb, st->time_base.num);

  586. 

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

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

  589. }

  590. 

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

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

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

  594. 

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

  596. {

  597.     MXFStreamContext *sc = st->priv_data;

  598.     ByteIOContext *pb = s->pb;

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

  600.     AVRational dar;

  601.     int f1, f2;

  602. 

  603.     mxf_write_generic_desc(pb, st, mxf_mpegvideo_descriptor_key, 153+sc->interlaced*4);

  604. 

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

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

  607. 

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

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

  610. 

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

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

  613. 

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

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

  616. 

  617.     // bit rate

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

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

  620. 

  621.     // frame layout

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

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

  624. 

  625.     // video line map

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

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

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

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

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

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

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

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

  634.     }

  635. 

  636.     if (!sc->interlaced) {

  637.         f2  = 0;

  638.         f1 *= 2;

  639.     }

  640. 

  641.     mxf_write_local_tag(pb, 16, 0x320D);

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

  643.     put_be32(pb, 4);

  644.     put_be32(pb, f1);

  645.     if (sc->interlaced)

  646.         put_be32(pb, f2);

  647. 

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

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

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

  651.               1024*1024);

  652. 

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

  654.     put_be32(pb, dar.num);

  655.     put_be32(pb, dar.den);

  656. 

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

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

  659. }

  660. 

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

  662. {

  663.     ByteIOContext *pb = s->pb;

  664. 

  665.     mxf_write_generic_desc(pb, st, key, size);

  666. 

  667.     // audio locked

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

  669.     put_byte(pb, 1);

  670. 

  671.     // write audio sampling rate

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

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

  674.     put_be32(pb, 1);

  675. 

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

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

  678. 

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

  680.     put_be32(pb, st->codec->bits_per_coded_sample);

  681. }

  682. 

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

  684. {

  685.     ByteIOContext *pb = s->pb;

  686. 

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

  688. 

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

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

  691. 

  692.     // avg bytes per sec

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

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

  695. }

  696. 

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

  698. {

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

  700. }

  701. 

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

  703. {

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

  705. }

  706. 

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

  708. {

  709.     ByteIOContext *pb = s->pb;

  710.     int i;

  711. 

  712.     if (type == MaterialPackage) {

  713.         mxf_write_metadata_key(pb, 0x013600);

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

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

  716.     } else {

  717.         mxf_write_metadata_key(pb, 0x013700);

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

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

  720.     }

  721. 

  722.     // write uid

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

  724.     mxf_write_uuid(pb, type, 0);

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

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

  727. 

  728.     // write package umid

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

  730.     mxf_write_umid(pb, type, 0);

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

  732. 

  733.     // write create date

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

  735.     put_be64(pb, 0);

  736. 

  737.     // write modified date

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

  739.     put_be64(pb, 0);

  740. 

  741.     // write track refs

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

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

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

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

  746. 

  747.     // write multiple descriptor reference

  748.     if (type == SourcePackage) {

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

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

  751.             mxf_write_uuid(pb, MultipleDescriptor, 0);

  752.             mxf_write_multi_descriptor(s);

  753.         } else

  754.             mxf_write_uuid(pb, SubDescriptor, 0);

  755.     }

  756. 

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

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

  759.         mxf_write_track(s, st, type);

  760.         mxf_write_sequence(s, st, type);

  761.         mxf_write_structural_component(s, st, type);

  762. 

  763.         if (type == SourcePackage) {

  764.             MXFStreamContext *sc = st->priv_data;

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

  766.         }

  767.     }

  768. }

  769. 

  770. static int mxf_write_essence_container_data(AVFormatContext *s)

  771. {

  772.     ByteIOContext *pb = s->pb;

  773. 

  774.     mxf_write_metadata_key(pb, 0x012300);

  775.     klv_encode_ber_length(pb, 64);

  776. 

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

  778.     mxf_write_uuid(pb, EssenceContainerData, 0);

  779. 

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

  781.     mxf_write_umid(pb, SourcePackage, 0);

  782. 

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

  784.     put_be32(pb, 1);

  785. 

  786.     return 0;

  787. }

  788. 

  789. static int mxf_write_header_metadata_sets(AVFormatContext *s)

  790. {

  791.     mxf_write_preface(s);

  792.     mxf_write_identification(s);

  793.     mxf_write_content_storage(s);

  794.     mxf_write_package(s, MaterialPackage);

  795.     mxf_write_package(s, SourcePackage);

  796.     mxf_write_essence_container_data(s);

  797.     return 0;

  798. }

  799. 

  800. static void mxf_write_partition(AVFormatContext *s, int bodysid, const uint8_t *key, int write_metadata)

  801. {

  802.     MXFContext *mxf = s->priv_data;

  803.     ByteIOContext *pb = s->pb;

  804.     int64_t header_byte_count_offset;

  805. 

  806.     // write klv

  807.     put_buffer(pb, key, 16);

  808. 

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

  810. 

  811.     // write partition value

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

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

  814.     put_be32(pb, 1); // kagSize

  815. 

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

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

  818. 

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

  820. 

  821.     // set offset

  822.     header_byte_count_offset = url_ftell(pb);

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

  824. 

  825.     // no indexTable

  826.     put_be64(pb, 0); // indexByteCount

  827.     put_be32(pb, 0); // indexSID

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

  829. 

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

  831.     put_buffer(pb, op1a_ul, 16); // operational pattern

  832. 

  833.     // essence container

  834.     mxf_write_essence_container_refs(s);

  835. 

  836.     if (write_metadata) {

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

  838.         int64_t pos, start = url_ftell(s->pb);

  839.         mxf_write_primer_pack(s);

  840.         mxf_write_header_metadata_sets(s);

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

  842.         // update header_byte_count

  843.         url_fseek(pb, header_byte_count_offset, SEEK_SET);

  844.         put_be64(pb, pos - start);

  845.         url_fseek(pb, pos, SEEK_SET);

  846.     }

  847. 

  848.     put_flush_packet(pb);

  849. }

  850. 

  851. static const UID mxf_mpeg2_codec_uls[] = {

  852.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame

  853.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP

  854.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame

  855.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP

  856.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame

  857.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP

  858.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame

  859.     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP

  860. };

  861. 

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

  863. {

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

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

  866.             return avctx->gop_size ?

  867.                 &mxf_mpeg2_codec_uls[1] :

  868.                 &mxf_mpeg2_codec_uls[0];

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

  870.             return avctx->gop_size ?

  871.                 &mxf_mpeg2_codec_uls[5] :

  872.                 &mxf_mpeg2_codec_uls[4];

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

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

  875.             return avctx->gop_size ?

  876.                 &mxf_mpeg2_codec_uls[3] :

  877.                 &mxf_mpeg2_codec_uls[2];

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

  879.             return avctx->gop_size ?

  880.                 &mxf_mpeg2_codec_uls[7] :

  881.                 &mxf_mpeg2_codec_uls[6];

  882.     }

  883.     return NULL;

  884. }

  885. 

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

  887. {

  888.     MXFStreamContext *sc = st->priv_data;

  889.     uint32_t c = -1;

  890.     int i;

  891. 

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

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

  894.         if (c == 0x1B5) {

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

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

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

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

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

  900.                 break;

  901.             }

  902.         }

  903.     }

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

  905.     return !!sc->codec_ul;

  906. }

  907. 

  908. static int ff_audio_interleave_init(AVFormatContext *s, const int *samples_per_frame)

  909. {

  910.     int i;

  911. 

  912.     if (!samples_per_frame)

  913.         return -1;

  914. 

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

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

  917.         AudioInterleaveContext *aic = st->priv_data;

  918. 

  919.         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {

  920.             aic->sample_size = (st->codec->channels *

  921.                                 av_get_bits_per_sample(st->codec->codec_id)) / 8;

  922.             if (!aic->sample_size) {

  923.                 av_log(s, AV_LOG_ERROR, "could not compute sample size\n");

  924.                 return -1;

  925.             }

  926.             aic->samples_per_frame = samples_per_frame;

  927.             aic->samples = aic->samples_per_frame;

  928. 

  929.             av_fifo_init(&aic->fifo, 100 * *aic->samples);

  930.         }

  931.     }

  932. 

  933.     return 0;

  934. }

  935. 

  936. static void ff_audio_interleave_close(AVFormatContext *s)

  937. {

  938.     int i;

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

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

  941.         AudioInterleaveContext *aic = st->priv_data;

  942. 

  943.         if (st->codec->codec_type == CODEC_TYPE_AUDIO)

  944.             av_fifo_free(&aic->fifo);

  945.     }

  946. }

  947. 

  948. static int mxf_write_header(AVFormatContext *s)

  949. {

  950.     MXFContext *mxf = s->priv_data;

  951.     int i;

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

  953.     const int *samples_per_frame = NULL;

  954. 

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

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

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

  958.         if (!sc)

  959.             return AVERROR(ENOMEM);

  960.         st->priv_data = sc;

  961. 

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

  963.             if (!av_cmp_q(st->codec->time_base, (AVRational){ 1, 25 })) {

  964.                 samples_per_frame = PAL_samples_per_frame;

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

  966.             } else if (!av_cmp_q(st->codec->time_base, (AVRational){ 1001, 30000 })) {

  967.                 samples_per_frame = NTSC_samples_per_frame;

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

  969.             } else {

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

  971.                 return -1;

  972.             }

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

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

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

  976.                 return -1;

  977.             }

  978.         }

  979.         sc->duration = -1;

  980. 

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

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

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

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

  985.             return -1;

  986.         }

  987. 

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

  989. 

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

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

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

  993.         } else

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

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

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

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

  998.     }

  999. 

  1000.     for (i = 0; i < s->nb_streams; i++) {

  1001.         MXFStreamContext *sc = s->streams[i]->priv_data;

  1002.         av_set_pts_info(s->streams[i], 64, mxf->time_base.num, mxf->time_base.den);

  1003.         // update element count

  1004.         sc->track_essence_element_key[13] = present[sc->index];

  1005.         sc->order = AV_RB32(sc->track_essence_element_key+12);

  1006.     }

  1007. 

  1008.     if (!samples_per_frame)

  1009.         samples_per_frame = PAL_samples_per_frame;

  1010. 

  1011.     if (ff_audio_interleave_init(s, samples_per_frame) < 0)

  1012.         return -1;

  1013. 

  1014.     return 0;

  1015. }

  1016. 

  1017. static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)

  1018. {

  1019.     MXFContext *mxf = s->priv_data;

  1020.     ByteIOContext *pb = s->pb;

  1021.     AVStream *st = s->streams[pkt->stream_index];

  1022.     MXFStreamContext *sc = st->priv_data;

  1023. 

  1024.     if (!mxf->header_written) {

  1025.         if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {

  1026.             if (!mxf_parse_mpeg2_frame(s, st, pkt)) {

  1027.                 av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");

  1028.                 return -1;

  1029.             }

  1030.         }

  1031.         mxf_write_partition(s, 1, header_open_partition_key, 1);

  1032.         mxf->header_written = 1;

  1033.     }

  1034. 

  1035.     put_buffer(pb, sc->track_essence_element_key, 16); // write key

  1036.     klv_encode_ber_length(pb, pkt->size); // write length

  1037.     put_buffer(pb, pkt->data, pkt->size); // write value

  1038. 

  1039.     sc->duration = FFMAX(pkt->pts + pkt->duration, sc->duration);

  1040. 

  1041.     put_flush_packet(pb);

  1042.     return 0;

  1043. }

  1044. 

  1045. static int mxf_write_footer(AVFormatContext *s)

  1046. {

  1047.     MXFContext *mxf = s->priv_data;

  1048.     ByteIOContext *pb = s->pb;

  1049. 

  1050.     mxf->footer_partition_offset = url_ftell(pb);

  1051.     mxf_write_partition(s, 0, footer_partition_key, 0);

  1052.     if (!url_is_streamed(s->pb)) {

  1053.         url_fseek(pb, 0, SEEK_SET);

  1054.         mxf_write_partition(s, 1, header_closed_partition_key, 1);

  1055.     }

  1056. 

  1057.     ff_audio_interleave_close(s);

  1058. 

  1059.     mxf_free(s);

  1060.     return 0;

  1061. }

  1062. 

  1063. static int mxf_interleave_new_audio_packet(AVFormatContext *s, AVPacket *pkt,

  1064.                                            int stream_index, int flush)

  1065. {

  1066.     AVStream *st = s->streams[stream_index];

  1067.     AudioInterleaveContext *aic = st->priv_data;

  1068. 

  1069.     int size = FFMIN(av_fifo_size(&aic->fifo), *aic->samples * aic->sample_size);

  1070.     if (!size || (!flush && size == av_fifo_size(&aic->fifo)))

  1071.         return 0;

  1072. 

  1073.     av_new_packet(pkt, size);

  1074.     av_fifo_read(&aic->fifo, pkt->data, size);

  1075. 

  1076.     pkt->dts = pkt->pts = aic->dts;

  1077.     pkt->duration = av_rescale_q(*aic->samples,

  1078.                                  (AVRational){ 1, st->codec->sample_rate },

  1079.                                  st->time_base);

  1080.     pkt->stream_index = stream_index;

  1081.     aic->dts += pkt->duration;

  1082. 

  1083.     aic->samples++;

  1084.     if (!*aic->samples)

  1085.         aic->samples = aic->samples_per_frame;

  1086. 

  1087.     return size;

  1088. }

  1089. 

  1090. static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  1091. {

  1092.     AVPacketList *pktl;

  1093.     int stream_count = 0;

  1094.     int streams[MAX_STREAMS];

  1095. 

  1096.     memset(streams, 0, sizeof(streams));

  1097.     pktl = s->packet_buffer;

  1098.     while (pktl) {

  1099.         //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);

  1100.         if (!streams[pktl->pkt.stream_index])

  1101.             stream_count++;

  1102.         streams[pktl->pkt.stream_index]++;

  1103.         pktl = pktl->next;

  1104.     }

  1105. 

  1106.     if (stream_count && (s->nb_streams == stream_count || flush)) {

  1107.         pktl = s->packet_buffer;

  1108.         *out = pktl->pkt;

  1109.         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);

  1110.         s->packet_buffer = pktl->next;

  1111.         av_freep(&pktl);

  1112. 

  1113.         if (flush && stream_count < s->nb_streams) {

  1114.             // purge packet queue

  1115.             pktl = s->packet_buffer;

  1116.             while (pktl) {

  1117.                 AVPacketList *next = pktl->next;

  1118.                 av_free_packet(&pktl->pkt);

  1119.                 av_freep(&pktl);

  1120.                 pktl = next;

  1121.             }

  1122.             s->packet_buffer = NULL;

  1123.         }

  1124. 

  1125.         return 1;

  1126.     } else {

  1127.         av_init_packet(out);

  1128.         return 0;

  1129.     }

  1130. }

  1131. 

  1132. static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)

  1133. {

  1134.     AVStream *st  = s->streams[pkt ->stream_index];

  1135.     AVStream *st2 = s->streams[next->stream_index];

  1136.     MXFStreamContext *sc  = st ->priv_data;

  1137.     MXFStreamContext *sc2 = st2->priv_data;

  1138. 

  1139.     int64_t left  = st2->time_base.num * (int64_t)st ->time_base.den;

  1140.     int64_t right = st ->time_base.num * (int64_t)st2->time_base.den;

  1141. 

  1142.     return next->dts * left > pkt->dts * right || // FIXME this can overflow

  1143.         (next->dts * left == pkt->dts * right && sc->order < sc2->order);

  1144. }

  1145. 

  1146. static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

  1147. {

  1148.     int i;

  1149. 

  1150.     if (pkt) {

  1151.         AVStream *st = s->streams[pkt->stream_index];

  1152.         AudioInterleaveContext *aic = st->priv_data;

  1153.         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {

  1154.             av_fifo_generic_write(&aic->fifo, pkt->data, pkt->size, NULL);

  1155.         } else {

  1156.             // rewrite pts and dts to be decoded time line position

  1157.             pkt->pts = pkt->dts = aic->dts;

  1158.             aic->dts += pkt->duration;

  1159.             ff_interleave_add_packet(s, pkt, mxf_compare_timestamps);

  1160.         }

  1161.         pkt = NULL;

  1162.     }

  1163. 

  1164.     for (i = 0; i < s->nb_streams; i++) {

  1165.         AVStream *st = s->streams[i];

  1166.         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {

  1167.             AVPacket new_pkt;

  1168.             while (mxf_interleave_new_audio_packet(s, &new_pkt, i, flush))

  1169.                 ff_interleave_add_packet(s, &new_pkt, mxf_compare_timestamps);

  1170.         }

  1171.     }

  1172. 

  1173.     return mxf_interleave_get_packet(s, out, pkt, flush);

  1174. }

  1175. 

  1176. AVOutputFormat mxf_muxer = {

  1177.     "mxf",

  1178.     NULL_IF_CONFIG_SMALL("Material eXchange Format"),

  1179.     NULL,

  1180.     "mxf",

  1181.     sizeof(MXFContext),

  1182.     CODEC_ID_PCM_S16LE,

  1183.     CODEC_ID_MPEG2VIDEO,

  1184.     mxf_write_header,

  1185.     mxf_write_packet,

  1186.     mxf_write_footer,

  1187.     0,

  1188.     NULL,

  1189.     mxf_interleave,

  1190. };