FFmpeg: libavformat/mxfenc.c Source File

00001 /*
00002  * MXF muxer
00003  * Copyright (c) 2008 GUCAS, Zhentan Feng <spyfeng at gmail dot com>
00004  * Copyright (c) 2008 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
00005  *
00006  * This file is part of FFmpeg.
00007  *
00008  * FFmpeg is free software; you can redistribute it and/or
00009  * modify it under the terms of the GNU Lesser General Public
00010  * License as published by the Free Software Foundation; either
00011  * version 2.1 of the License, or (at your option) any later version.
00012  *
00013  * FFmpeg is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016  * Lesser General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU Lesser General Public
00019  * License along with FFmpeg; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00021  */
00022 
00023 /*
00024  * References
00025  * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
00026  * SMPTE 377M MXF File Format Specifications
00027  * SMPTE 379M MXF Generic Container
00028  * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
00029  * SMPTE RP210: SMPTE Metadata Dictionary
00030  * SMPTE RP224: Registry of SMPTE Universal Labels
00031  */
00032 
00033 //#define DEBUG
00034 
00035 #include <math.h>
00036 #include <time.h>
00037 
00038 #include "libavutil/random_seed.h"
00039 #include "libavcodec/bytestream.h"
00040 #include "audiointerleave.h"
00041 #include "avformat.h"
00042 #include "mxf.h"
00043 
00044 static const int NTSC_samples_per_frame[] = { 1602, 1601, 1602, 1601, 1602, 0 };
00045 static const int PAL_samples_per_frame[]  = { 1920, 0 };
00046 
00047 extern AVOutputFormat ff_mxf_d10_muxer;
00048 
00049 #define EDIT_UNITS_PER_BODY 250
00050 #define KAG_SIZE 512
00051 
00052 typedef struct {
00053     int local_tag;
00054     UID uid;
00055 } MXFLocalTagPair;
00056 
00057 typedef struct {
00058     uint8_t flags;
00059     uint64_t offset;
00060     unsigned slice_offset; 
00061     uint16_t temporal_ref;
00062 } MXFIndexEntry;
00063 
00064 typedef struct {
00065     AudioInterleaveContext aic;
00066     UID track_essence_element_key;
00067     int index;               
00068     const UID *codec_ul;
00069     int order;               
00070     int interlaced;          
00071     int temporal_reordering;
00072     AVRational aspect_ratio; 
00073     int closed_gop;          
00074 } MXFStreamContext;
00075 
00076 typedef struct {
00077     UID container_ul;
00078     UID element_ul;
00079     UID codec_ul;
00080     void (*write_desc)(AVFormatContext *, AVStream *);
00081 } MXFContainerEssenceEntry;
00082 
00083 static const struct {
00084     enum CodecID id;
00085     int index;
00086 } mxf_essence_mappings[] = {
00087     { CODEC_ID_MPEG2VIDEO, 0 },
00088     { CODEC_ID_PCM_S24LE,  1 },
00089     { CODEC_ID_PCM_S16LE,  1 },
00090     { CODEC_ID_NONE }
00091 };
00092 
00093 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st);
00094 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st);
00095 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st);
00096 static void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st);
00097 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st);
00098 
00099 static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {
00100     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },
00101       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },
00102       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },
00103       mxf_write_mpegvideo_desc },
00104     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },
00105       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },
00106       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
00107       mxf_write_aes3_desc },
00108     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },
00109       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },
00110       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
00111       mxf_write_wav_desc },
00112     // D-10 625/50 PAL 50mb/s
00113     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },
00114       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
00115       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 },
00116       mxf_write_cdci_desc },
00117     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },
00118       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
00119       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
00120       mxf_write_generic_sound_desc },
00121     // D-10 525/60 NTSC 50mb/s
00122     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },
00123       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
00124       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x02 },
00125       mxf_write_cdci_desc },
00126     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },
00127       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
00128       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
00129       mxf_write_generic_sound_desc },
00130     // D-10 625/50 PAL 40mb/s
00131     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },
00132       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
00133       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x03 },
00134       mxf_write_cdci_desc },
00135     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },
00136       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
00137       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
00138       mxf_write_generic_sound_desc },
00139     // D-10 525/60 NTSC 40mb/s
00140     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },
00141       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
00142       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x04 },
00143       mxf_write_cdci_desc },
00144     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },
00145       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
00146       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
00147       mxf_write_generic_sound_desc },
00148     // D-10 625/50 PAL 30mb/s
00149     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },
00150       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
00151       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 },
00152       mxf_write_cdci_desc },
00153     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },
00154       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
00155       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
00156       mxf_write_generic_sound_desc },
00157     // D-10 525/60 NTSC 30mb/s
00158     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },
00159       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
00160       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x06 },
00161       mxf_write_cdci_desc },
00162     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },
00163       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
00164       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
00165       mxf_write_generic_sound_desc },
00166     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
00167       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
00168       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
00169       NULL },
00170 };
00171 
00172 typedef struct MXFContext {
00173     int64_t footer_partition_offset;
00174     int essence_container_count;
00175     AVRational time_base;
00176     int header_written;
00177     MXFIndexEntry *index_entries;
00178     unsigned edit_units_count;
00179     uint64_t timestamp;   
00180     uint8_t slice_count;  
00181     int last_indexed_edit_unit;
00182     uint64_t *body_partition_offset;
00183     unsigned body_partitions_count;
00184     int last_key_index;  
00185     uint64_t duration;
00186     AVStream *timecode_track;
00187     int timecode_base;       
00188     int timecode_start;      
00189     int timecode_drop_frame; 
00190     int edit_unit_byte_count; 
00191     uint64_t body_offset;
00192     uint32_t instance_number;
00193     uint8_t umid[16];        
00194 } MXFContext;
00195 
00196 static const uint8_t uuid_base[]            = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };
00197 static const uint8_t umid_ul[]              = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x01,0x0D,0x00,0x13 };
00198 
00202 static const uint8_t op1a_ul[]                     = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x09,0x00 };
00203 static const uint8_t footer_partition_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }; // ClosedComplete
00204 static const uint8_t primer_pack_key[]             = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x05,0x01,0x00 };
00205 static const uint8_t index_table_segment_key[]     = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 };
00206 static const uint8_t random_index_pack_key[]       = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
00207 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
00208 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
00209 static const uint8_t klv_fill_key[]                = { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x03,0x01,0x02,0x10,0x01,0x00,0x00,0x00 };
00210 static const uint8_t body_partition_key[]          = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }; // ClosedComplete
00211 
00215 static const uint8_t header_metadata_key[]  = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01 };
00216 static const uint8_t multiple_desc_ul[]     = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x0D,0x01,0x03,0x01,0x02,0x7F,0x01,0x00 };
00217 
00221 static const MXFLocalTagPair mxf_local_tag_batch[] = {
00222     // preface set
00223     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */
00224     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */
00225     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */
00226     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */
00227     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */
00228     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */
00229     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */
00230     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */
00231     // Identification
00232     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */
00233     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */
00234     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */
00235     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */
00236     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */
00237     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */
00238     // Content Storage
00239     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */
00240     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */
00241     // Essence Container Data
00242     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */
00243     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */
00244     // Package
00245     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */
00246     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */
00247     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */
00248     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */
00249     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */
00250     // Track
00251     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */
00252     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */
00253     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */
00254     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */
00255     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */
00256     // Sequence
00257     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */
00258     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */
00259     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */
00260     // Source Clip
00261     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */
00262     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */
00263     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */
00264     // Timecode Component
00265     { 0x1501, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x05,0x00,0x00}}, /* Start Time Code */
00266     { 0x1502, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x04,0x01,0x01,0x02,0x06,0x00,0x00}}, /* Rounded Time Code Base */
00267     { 0x1503, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x04,0x01,0x01,0x05,0x00,0x00,0x00}}, /* Drop Frame */
00268     // File Descriptor
00269     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */
00270     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */
00271     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */
00272     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */
00273     // Generic Picture Essence Descriptor
00274     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */
00275     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */
00276     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */
00277     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */
00278     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */
00279     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */
00280     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */
00281     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */
00282     // CDCI Picture Essence Descriptor
00283     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */
00284     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */
00285     // Generic Sound Essence Descriptor
00286     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */
00287     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */
00288     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */
00289     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */
00290     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */
00291     // Index Table Segment
00292     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */
00293     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */
00294     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */
00295     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */
00296     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */
00297     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */
00298     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */
00299     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */
00300     // MPEG video Descriptor
00301     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */
00302     { 0x8007, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0A,0x00,0x00}}, /* ProfileAndLevel */
00303     // Wave Audio Essence Descriptor
00304     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */
00305     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */
00306 };
00307 
00308 static void mxf_write_uuid(AVIOContext *pb, enum MXFMetadataSetType type, int value)
00309 {
00310     avio_write(pb, uuid_base, 12);
00311     avio_wb16(pb, type);
00312     avio_wb16(pb, value);
00313 }
00314 
00315 static void mxf_write_umid(AVFormatContext *s, int type)
00316 {
00317     MXFContext *mxf = s->priv_data;
00318     avio_write(s->pb, umid_ul, 13);
00319     avio_wb24(s->pb, mxf->instance_number);
00320     avio_write(s->pb, mxf->umid, 15);
00321     avio_w8(s->pb, type);
00322 }
00323 
00324 static void mxf_write_refs_count(AVIOContext *pb, int ref_count)
00325 {
00326     avio_wb32(pb, ref_count);
00327     avio_wb32(pb, 16);
00328 }
00329 
00330 static int klv_ber_length(uint64_t len)
00331 {
00332     if (len < 128)
00333         return 1;
00334     else
00335         return (av_log2(len) >> 3) + 2;
00336 }
00337 
00338 static int klv_encode_ber_length(AVIOContext *pb, uint64_t len)
00339 {
00340     // Determine the best BER size
00341     int size;
00342     if (len < 128) {
00343         //short form
00344         avio_w8(pb, len);
00345         return 1;
00346     }
00347 
00348     size = (av_log2(len) >> 3) + 1;
00349 
00350     // long form
00351     avio_w8(pb, 0x80 + size);
00352     while(size) {
00353         size--;
00354         avio_w8(pb, len >> 8 * size & 0xff);
00355     }
00356     return 0;
00357 }
00358 
00359 static void klv_encode_ber4_length(AVIOContext *pb, int len)
00360 {
00361     avio_w8(pb, 0x80 + 3);
00362     avio_wb24(pb, len);
00363 }
00364 
00365 /*
00366  * Get essence container ul index
00367  */
00368 static int mxf_get_essence_container_ul_index(enum CodecID id)
00369 {
00370     int i;
00371     for (i = 0; mxf_essence_mappings[i].id; i++)
00372         if (mxf_essence_mappings[i].id == id)
00373             return mxf_essence_mappings[i].index;
00374     return -1;
00375 }
00376 
00377 static void mxf_write_primer_pack(AVFormatContext *s)
00378 {
00379     AVIOContext *pb = s->pb;
00380     int local_tag_number, i = 0;
00381 
00382     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);
00383 
00384     avio_write(pb, primer_pack_key, 16);
00385     klv_encode_ber_length(pb, local_tag_number * 18 + 8);
00386 
00387     avio_wb32(pb, local_tag_number); // local_tag num
00388     avio_wb32(pb, 18); // item size, always 18 according to the specs
00389 
00390     for (i = 0; i < local_tag_number; i++) {
00391         avio_wb16(pb, mxf_local_tag_batch[i].local_tag);
00392         avio_write(pb, mxf_local_tag_batch[i].uid, 16);
00393     }
00394 }
00395 
00396 static void mxf_write_local_tag(AVIOContext *pb, int size, int tag)
00397 {
00398     avio_wb16(pb, tag);
00399     avio_wb16(pb, size);
00400 }
00401 
00402 static void mxf_write_metadata_key(AVIOContext *pb, unsigned int value)
00403 {
00404     avio_write(pb, header_metadata_key, 13);
00405     avio_wb24(pb, value);
00406 }
00407 
00408 static void mxf_free(AVFormatContext *s)
00409 {
00410     int i;
00411 
00412     for (i = 0; i < s->nb_streams; i++) {
00413         AVStream *st = s->streams[i];
00414         av_freep(&st->priv_data);
00415     }
00416 }
00417 
00418 static const MXFCodecUL *mxf_get_data_definition_ul(int type)
00419 {
00420     const MXFCodecUL *uls = ff_mxf_data_definition_uls;
00421     while (uls->uid[0]) {
00422         if (type == uls->id)
00423             break;
00424         uls++;
00425     }
00426     return uls;
00427 }
00428 
00429 static void mxf_write_essence_container_refs(AVFormatContext *s)
00430 {
00431     MXFContext *c = s->priv_data;
00432     AVIOContext *pb = s->pb;
00433     int i;
00434 
00435     mxf_write_refs_count(pb, c->essence_container_count);
00436     av_log(s,AV_LOG_DEBUG, "essence container count:%d\n", c->essence_container_count);
00437     for (i = 0; i < c->essence_container_count; i++) {
00438         MXFStreamContext *sc = s->streams[i]->priv_data;
00439         avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
00440     }
00441 }
00442 
00443 static void mxf_write_preface(AVFormatContext *s)
00444 {
00445     MXFContext *mxf = s->priv_data;
00446     AVIOContext *pb = s->pb;
00447 
00448     mxf_write_metadata_key(pb, 0x012f00);
00449     PRINT_KEY(s, "preface key", pb->buf_ptr - 16);
00450     klv_encode_ber_length(pb, 130 + 16 * mxf->essence_container_count);
00451 
00452     // write preface set uid
00453     mxf_write_local_tag(pb, 16, 0x3C0A);
00454     mxf_write_uuid(pb, Preface, 0);
00455     PRINT_KEY(s, "preface uid", pb->buf_ptr - 16);
00456 
00457     // last modified date
00458     mxf_write_local_tag(pb, 8, 0x3B02);
00459     avio_wb64(pb, mxf->timestamp);
00460 
00461     // write version
00462     mxf_write_local_tag(pb, 2, 0x3B05);
00463     avio_wb16(pb, 258); // v1.2
00464 
00465     // write identification_refs
00466     mxf_write_local_tag(pb, 16 + 8, 0x3B06);
00467     mxf_write_refs_count(pb, 1);
00468     mxf_write_uuid(pb, Identification, 0);
00469 
00470     // write content_storage_refs
00471     mxf_write_local_tag(pb, 16, 0x3B03);
00472     mxf_write_uuid(pb, ContentStorage, 0);
00473 
00474     // operational pattern
00475     mxf_write_local_tag(pb, 16, 0x3B09);
00476     avio_write(pb, op1a_ul, 16);
00477 
00478     // write essence_container_refs
00479     mxf_write_local_tag(pb, 8 + 16 * mxf->essence_container_count, 0x3B0A);
00480     mxf_write_essence_container_refs(s);
00481 
00482     // write dm_scheme_refs
00483     mxf_write_local_tag(pb, 8, 0x3B0B);
00484     avio_wb64(pb, 0);
00485 }
00486 
00487 /*
00488  * Write a local tag containing an ascii string as utf-16
00489  */
00490 static void mxf_write_local_tag_utf16(AVIOContext *pb, int tag, const char *value)
00491 {
00492     int i, size = strlen(value);
00493     mxf_write_local_tag(pb, size*2, tag);
00494     for (i = 0; i < size; i++)
00495         avio_wb16(pb, value[i]);
00496 }
00497 
00498 static void mxf_write_identification(AVFormatContext *s)
00499 {
00500     MXFContext *mxf = s->priv_data;
00501     AVIOContext *pb = s->pb;
00502     const char *company = "FFmpeg";
00503     const char *product = "OP1a Muxer";
00504     const char *version;
00505     int length;
00506 
00507     mxf_write_metadata_key(pb, 0x013000);
00508     PRINT_KEY(s, "identification key", pb->buf_ptr - 16);
00509 
00510     version = s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT ?
00511         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);
00512     length = 84 + (strlen(company)+strlen(product)+strlen(version))*2; // utf-16
00513     klv_encode_ber_length(pb, length);
00514 
00515     // write uid
00516     mxf_write_local_tag(pb, 16, 0x3C0A);
00517     mxf_write_uuid(pb, Identification, 0);
00518     PRINT_KEY(s, "identification uid", pb->buf_ptr - 16);
00519 
00520     // write generation uid
00521     mxf_write_local_tag(pb, 16, 0x3C09);
00522     mxf_write_uuid(pb, Identification, 1);
00523 
00524     mxf_write_local_tag_utf16(pb, 0x3C01, company); // Company Name
00525     mxf_write_local_tag_utf16(pb, 0x3C02, product); // Product Name
00526     mxf_write_local_tag_utf16(pb, 0x3C04, version); // Version String
00527 
00528     // write product uid
00529     mxf_write_local_tag(pb, 16, 0x3C05);
00530     mxf_write_uuid(pb, Identification, 2);
00531 
00532     // modification date
00533     mxf_write_local_tag(pb, 8, 0x3C06);
00534     avio_wb64(pb, mxf->timestamp);
00535 }
00536 
00537 static void mxf_write_content_storage(AVFormatContext *s)
00538 {
00539     AVIOContext *pb = s->pb;
00540 
00541     mxf_write_metadata_key(pb, 0x011800);
00542     PRINT_KEY(s, "content storage key", pb->buf_ptr - 16);
00543     klv_encode_ber_length(pb, 92);
00544 
00545     // write uid
00546     mxf_write_local_tag(pb, 16, 0x3C0A);
00547     mxf_write_uuid(pb, ContentStorage, 0);
00548     PRINT_KEY(s, "content storage uid", pb->buf_ptr - 16);
00549 
00550     // write package reference
00551     mxf_write_local_tag(pb, 16 * 2 + 8, 0x1901);
00552     mxf_write_refs_count(pb, 2);
00553     mxf_write_uuid(pb, MaterialPackage, 0);
00554     mxf_write_uuid(pb, SourcePackage, 0);
00555 
00556     // write essence container data
00557     mxf_write_local_tag(pb, 8 + 16, 0x1902);
00558     mxf_write_refs_count(pb, 1);
00559     mxf_write_uuid(pb, EssenceContainerData, 0);
00560 }
00561 
00562 static void mxf_write_track(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
00563 {
00564     MXFContext *mxf = s->priv_data;
00565     AVIOContext *pb = s->pb;
00566     MXFStreamContext *sc = st->priv_data;
00567 
00568     mxf_write_metadata_key(pb, 0x013b00);
00569     PRINT_KEY(s, "track key", pb->buf_ptr - 16);
00570     klv_encode_ber_length(pb, 80);
00571 
00572     // write track uid
00573     mxf_write_local_tag(pb, 16, 0x3C0A);
00574     mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, st->index);
00575     PRINT_KEY(s, "track uid", pb->buf_ptr - 16);
00576 
00577     // write track id
00578     mxf_write_local_tag(pb, 4, 0x4801);
00579     avio_wb32(pb, st->index+2);
00580 
00581     // write track number
00582     mxf_write_local_tag(pb, 4, 0x4804);
00583     if (type == MaterialPackage)
00584         avio_wb32(pb, 0); // track number of material package is 0
00585     else
00586         avio_write(pb, sc->track_essence_element_key + 12, 4);
00587 
00588     mxf_write_local_tag(pb, 8, 0x4B01);
00589     avio_wb32(pb, mxf->time_base.den);
00590     avio_wb32(pb, mxf->time_base.num);
00591 
00592     // write origin
00593     mxf_write_local_tag(pb, 8, 0x4B02);
00594     avio_wb64(pb, 0);
00595 
00596     // write sequence refs
00597     mxf_write_local_tag(pb, 16, 0x4803);
00598     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
00599 }
00600 
00601 static const uint8_t smpte_12m_timecode_track_data_ul[] = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x01,0x01,0x00,0x00,0x00 };
00602 
00603 static void mxf_write_common_fields(AVFormatContext *s, AVStream *st)
00604 {
00605     MXFContext *mxf = s->priv_data;
00606     AVIOContext *pb = s->pb;
00607 
00608     // find data define uls
00609     mxf_write_local_tag(pb, 16, 0x0201);
00610     if (st == mxf->timecode_track)
00611         avio_write(pb, smpte_12m_timecode_track_data_ul, 16);
00612     else {
00613         const MXFCodecUL *data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);
00614         avio_write(pb, data_def_ul->uid, 16);
00615     }
00616 
00617     // write duration
00618     mxf_write_local_tag(pb, 8, 0x0202);
00619     avio_wb64(pb, mxf->duration);
00620 }
00621 
00622 static void mxf_write_sequence(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
00623 {
00624     MXFContext *mxf = s->priv_data;
00625     AVIOContext *pb = s->pb;
00626     enum MXFMetadataSetType component;
00627 
00628     mxf_write_metadata_key(pb, 0x010f00);
00629     PRINT_KEY(s, "sequence key", pb->buf_ptr - 16);
00630     klv_encode_ber_length(pb, 80);
00631 
00632     mxf_write_local_tag(pb, 16, 0x3C0A);
00633     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
00634 
00635     PRINT_KEY(s, "sequence uid", pb->buf_ptr - 16);
00636     mxf_write_common_fields(s, st);
00637 
00638     // write structural component
00639     mxf_write_local_tag(pb, 16 + 8, 0x1001);
00640     mxf_write_refs_count(pb, 1);
00641     if (st == mxf->timecode_track)
00642         component = TimecodeComponent;
00643     else
00644         component = SourceClip;
00645     if (type == SourcePackage)
00646         component += TypeBottom;
00647     mxf_write_uuid(pb, component, st->index);
00648 }
00649 
00650 static void mxf_write_timecode_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
00651 {
00652     MXFContext *mxf = s->priv_data;
00653     AVIOContext *pb = s->pb;
00654 
00655     mxf_write_metadata_key(pb, 0x011400);
00656     klv_encode_ber_length(pb, 75);
00657 
00658     // UID
00659     mxf_write_local_tag(pb, 16, 0x3C0A);
00660     mxf_write_uuid(pb, type == MaterialPackage ? TimecodeComponent :
00661                    TimecodeComponent + TypeBottom, st->index);
00662 
00663     mxf_write_common_fields(s, st);
00664 
00665     // Start Time Code
00666     mxf_write_local_tag(pb, 8, 0x1501);
00667     avio_wb64(pb, mxf->timecode_start);
00668 
00669     // Rounded Time Code Base
00670     mxf_write_local_tag(pb, 2, 0x1502);
00671     avio_wb16(pb, mxf->timecode_base);
00672 
00673     // Drop Frame
00674     mxf_write_local_tag(pb, 1, 0x1503);
00675     avio_w8(pb, mxf->timecode_drop_frame);
00676 }
00677 
00678 static void mxf_write_structural_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
00679 {
00680     AVIOContext *pb = s->pb;
00681     int i;
00682 
00683     mxf_write_metadata_key(pb, 0x011100);
00684     PRINT_KEY(s, "sturctural component key", pb->buf_ptr - 16);
00685     klv_encode_ber_length(pb, 108);
00686 
00687     // write uid
00688     mxf_write_local_tag(pb, 16, 0x3C0A);
00689     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
00690 
00691     PRINT_KEY(s, "structural component uid", pb->buf_ptr - 16);
00692     mxf_write_common_fields(s, st);
00693 
00694     // write start_position
00695     mxf_write_local_tag(pb, 8, 0x1201);
00696     avio_wb64(pb, 0);
00697 
00698     // write source package uid, end of the reference
00699     mxf_write_local_tag(pb, 32, 0x1101);
00700     if (type == SourcePackage) {
00701         for (i = 0; i < 4; i++)
00702             avio_wb64(pb, 0);
00703     } else
00704         mxf_write_umid(s, 1);
00705 
00706     // write source track id
00707     mxf_write_local_tag(pb, 4, 0x1102);
00708     if (type == SourcePackage)
00709         avio_wb32(pb, 0);
00710     else
00711         avio_wb32(pb, st->index+2);
00712 }
00713 
00714 static void mxf_write_multi_descriptor(AVFormatContext *s)
00715 {
00716     MXFContext *mxf = s->priv_data;
00717     AVIOContext *pb = s->pb;
00718     const uint8_t *ul;
00719     int i;
00720 
00721     mxf_write_metadata_key(pb, 0x014400);
00722     PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);
00723     klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);
00724 
00725     mxf_write_local_tag(pb, 16, 0x3C0A);
00726     mxf_write_uuid(pb, MultipleDescriptor, 0);
00727     PRINT_KEY(s, "multi_desc uid", pb->buf_ptr - 16);
00728 
00729     // write sample rate
00730     mxf_write_local_tag(pb, 8, 0x3001);
00731     avio_wb32(pb, mxf->time_base.den);
00732     avio_wb32(pb, mxf->time_base.num);
00733 
00734     // write essence container ul
00735     mxf_write_local_tag(pb, 16, 0x3004);
00736     if (mxf->essence_container_count > 1)
00737         ul = multiple_desc_ul;
00738     else {
00739         MXFStreamContext *sc = s->streams[0]->priv_data;
00740         ul = mxf_essence_container_uls[sc->index].container_ul;
00741     }
00742     avio_write(pb, ul, 16);
00743 
00744     // write sub descriptor refs
00745     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x3F01);
00746     mxf_write_refs_count(pb, s->nb_streams);
00747     for (i = 0; i < s->nb_streams; i++)
00748         mxf_write_uuid(pb, SubDescriptor, i);
00749 }
00750 
00751 static void mxf_write_generic_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
00752 {
00753     MXFContext *mxf = s->priv_data;
00754     MXFStreamContext *sc = st->priv_data;
00755     AVIOContext *pb = s->pb;
00756 
00757     avio_write(pb, key, 16);
00758     klv_encode_ber4_length(pb, size+20+8+12+20);
00759 
00760     mxf_write_local_tag(pb, 16, 0x3C0A);
00761     mxf_write_uuid(pb, SubDescriptor, st->index);
00762 
00763     mxf_write_local_tag(pb, 4, 0x3006);
00764     avio_wb32(pb, st->index+2);
00765 
00766     mxf_write_local_tag(pb, 8, 0x3001);
00767     avio_wb32(pb, mxf->time_base.den);
00768     avio_wb32(pb, mxf->time_base.num);
00769 
00770     mxf_write_local_tag(pb, 16, 0x3004);
00771     avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
00772 }
00773 
00774 static const UID mxf_mpegvideo_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 };
00775 static const UID mxf_wav_descriptor_key       = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 };
00776 static const UID mxf_aes3_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 };
00777 static const UID mxf_cdci_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x28,0x00 };
00778 static const UID mxf_generic_sound_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x42,0x00 };
00779 
00780 static void mxf_write_cdci_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
00781 {
00782     MXFStreamContext *sc = st->priv_data;
00783     AVIOContext *pb = s->pb;
00784     int stored_height = (st->codec->height+15)/16*16;
00785     int display_height;
00786     int f1, f2;
00787 
00788     mxf_write_generic_desc(s, st, key, size+8+8+8+8+8+8+5+16+sc->interlaced*4+12+20);
00789 
00790     mxf_write_local_tag(pb, 4, 0x3203);
00791     avio_wb32(pb, st->codec->width);
00792 
00793     mxf_write_local_tag(pb, 4, 0x3202);
00794     avio_wb32(pb, stored_height>>sc->interlaced);
00795 
00796     mxf_write_local_tag(pb, 4, 0x3209);
00797     avio_wb32(pb, st->codec->width);
00798 
00799     if (st->codec->height == 608) // PAL + VBI
00800         display_height = 576;
00801     else if (st->codec->height == 512)  // NTSC + VBI
00802         display_height = 486;
00803     else
00804         display_height = st->codec->height;
00805 
00806     mxf_write_local_tag(pb, 4, 0x3208);
00807     avio_wb32(pb, display_height>>sc->interlaced);
00808 
00809     // component depth
00810     mxf_write_local_tag(pb, 4, 0x3301);
00811     avio_wb32(pb, 8);
00812 
00813     // horizontal subsampling
00814     mxf_write_local_tag(pb, 4, 0x3302);
00815     avio_wb32(pb, 2);
00816 
00817     // frame layout
00818     mxf_write_local_tag(pb, 1, 0x320C);
00819     avio_w8(pb, sc->interlaced);
00820 
00821     // video line map
00822     switch (st->codec->height) {
00823     case  576: f1 = 23; f2 = 336; break;
00824     case  608: f1 =  7; f2 = 320; break;
00825     case  480: f1 = 20; f2 = 283; break;
00826     case  512: f1 =  7; f2 = 270; break;
00827     case  720: f1 = 26; f2 =   0; break; // progressive
00828     case 1080: f1 = 21; f2 = 584; break;
00829     default:   f1 =  0; f2 =   0; break;
00830     }
00831 
00832     if (!sc->interlaced) {
00833         f2  = 0;
00834         f1 *= 2;
00835     }
00836 
00837     mxf_write_local_tag(pb, 12+sc->interlaced*4, 0x320D);
00838     avio_wb32(pb, sc->interlaced ? 2 : 1);
00839     avio_wb32(pb, 4);
00840     avio_wb32(pb, f1);
00841     if (sc->interlaced)
00842         avio_wb32(pb, f2);
00843 
00844     mxf_write_local_tag(pb, 8, 0x320E);
00845     avio_wb32(pb, sc->aspect_ratio.num);
00846     avio_wb32(pb, sc->aspect_ratio.den);
00847 
00848     mxf_write_local_tag(pb, 16, 0x3201);
00849     avio_write(pb, *sc->codec_ul, 16);
00850 }
00851 
00852 static void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st)
00853 {
00854     mxf_write_cdci_common(s, st, mxf_cdci_descriptor_key, 0);
00855 }
00856 
00857 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
00858 {
00859     AVIOContext *pb = s->pb;
00860     int profile_and_level = (st->codec->profile<<4) | st->codec->level;
00861 
00862     mxf_write_cdci_common(s, st, mxf_mpegvideo_descriptor_key, 8+5);
00863 
00864     // bit rate
00865     mxf_write_local_tag(pb, 4, 0x8000);
00866     avio_wb32(pb, st->codec->bit_rate);
00867 
00868     // profile and level
00869     mxf_write_local_tag(pb, 1, 0x8007);
00870     if (!st->codec->profile)
00871         profile_and_level |= 0x80; // escape bit
00872     avio_w8(pb, profile_and_level);
00873 }
00874 
00875 static void mxf_write_generic_sound_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
00876 {
00877     AVIOContext *pb = s->pb;
00878 
00879     mxf_write_generic_desc(s, st, key, size+5+12+8+8);
00880 
00881     // audio locked
00882     mxf_write_local_tag(pb, 1, 0x3D02);
00883     avio_w8(pb, 1);
00884 
00885     // write audio sampling rate
00886     mxf_write_local_tag(pb, 8, 0x3D03);
00887     avio_wb32(pb, st->codec->sample_rate);
00888     avio_wb32(pb, 1);
00889 
00890     mxf_write_local_tag(pb, 4, 0x3D07);
00891     avio_wb32(pb, st->codec->channels);
00892 
00893     mxf_write_local_tag(pb, 4, 0x3D01);
00894     avio_wb32(pb, av_get_bits_per_sample(st->codec->codec_id));
00895 }
00896 
00897 static void mxf_write_wav_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
00898 {
00899     AVIOContext *pb = s->pb;
00900 
00901     mxf_write_generic_sound_common(s, st, key, size+6+8);
00902 
00903     mxf_write_local_tag(pb, 2, 0x3D0A);
00904     avio_wb16(pb, st->codec->block_align);
00905 
00906     // avg bytes per sec
00907     mxf_write_local_tag(pb, 4, 0x3D09);
00908     avio_wb32(pb, st->codec->block_align*st->codec->sample_rate);
00909 }
00910 
00911 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)
00912 {
00913     mxf_write_wav_common(s, st, mxf_wav_descriptor_key, 0);
00914 }
00915 
00916 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)
00917 {
00918     mxf_write_wav_common(s, st, mxf_aes3_descriptor_key, 0);
00919 }
00920 
00921 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st)
00922 {
00923     mxf_write_generic_sound_common(s, st, mxf_generic_sound_descriptor_key, 0);
00924 }
00925 
00926 static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)
00927 {
00928     MXFContext *mxf = s->priv_data;
00929     AVIOContext *pb = s->pb;
00930     int i, track_count = s->nb_streams+1;
00931 
00932     if (type == MaterialPackage) {
00933         mxf_write_metadata_key(pb, 0x013600);
00934         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);
00935         klv_encode_ber_length(pb, 92 + 16*track_count);
00936     } else {
00937         mxf_write_metadata_key(pb, 0x013700);
00938         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);
00939         klv_encode_ber_length(pb, 112 + 16*track_count); // 20 bytes length for descriptor reference
00940     }
00941 
00942     // write uid
00943     mxf_write_local_tag(pb, 16, 0x3C0A);
00944     mxf_write_uuid(pb, type, 0);
00945     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);
00946     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);
00947 
00948     // write package umid
00949     mxf_write_local_tag(pb, 32, 0x4401);
00950     mxf_write_umid(s, type == SourcePackage);
00951     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);
00952 
00953     // package creation date
00954     mxf_write_local_tag(pb, 8, 0x4405);
00955     avio_wb64(pb, mxf->timestamp);
00956 
00957     // package modified date
00958     mxf_write_local_tag(pb, 8, 0x4404);
00959     avio_wb64(pb, mxf->timestamp);
00960 
00961     // write track refs
00962     mxf_write_local_tag(pb, track_count*16 + 8, 0x4403);
00963     mxf_write_refs_count(pb, track_count);
00964     mxf_write_uuid(pb, type == MaterialPackage ? Track :
00965                    Track + TypeBottom, -1); // timecode track
00966     for (i = 0; i < s->nb_streams; i++)
00967         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);
00968 
00969     // write multiple descriptor reference
00970     if (type == SourcePackage) {
00971         mxf_write_local_tag(pb, 16, 0x4701);
00972         if (s->nb_streams > 1) {
00973             mxf_write_uuid(pb, MultipleDescriptor, 0);
00974             mxf_write_multi_descriptor(s);
00975         } else
00976             mxf_write_uuid(pb, SubDescriptor, 0);
00977     }
00978 
00979     // write timecode track
00980     mxf_write_track(s, mxf->timecode_track, type);
00981     mxf_write_sequence(s, mxf->timecode_track, type);
00982     mxf_write_timecode_component(s, mxf->timecode_track, type);
00983 
00984     for (i = 0; i < s->nb_streams; i++) {
00985         AVStream *st = s->streams[i];
00986         mxf_write_track(s, st, type);
00987         mxf_write_sequence(s, st, type);
00988         mxf_write_structural_component(s, st, type);
00989 
00990         if (type == SourcePackage) {
00991             MXFStreamContext *sc = st->priv_data;
00992             mxf_essence_container_uls[sc->index].write_desc(s, st);
00993         }
00994     }
00995 }
00996 
00997 static int mxf_write_essence_container_data(AVFormatContext *s)
00998 {
00999     AVIOContext *pb = s->pb;
01000 
01001     mxf_write_metadata_key(pb, 0x012300);
01002     klv_encode_ber_length(pb, 72);
01003 
01004     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID
01005     mxf_write_uuid(pb, EssenceContainerData, 0);
01006 
01007     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID
01008     mxf_write_umid(s, 1);
01009 
01010     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID
01011     avio_wb32(pb, 1);
01012 
01013     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID
01014     avio_wb32(pb, 2);
01015 
01016     return 0;
01017 }
01018 
01019 static int mxf_write_header_metadata_sets(AVFormatContext *s)
01020 {
01021     mxf_write_preface(s);
01022     mxf_write_identification(s);
01023     mxf_write_content_storage(s);
01024     mxf_write_package(s, MaterialPackage);
01025     mxf_write_package(s, SourcePackage);
01026     mxf_write_essence_container_data(s);
01027     return 0;
01028 }
01029 
01030 static unsigned klv_fill_size(uint64_t size)
01031 {
01032     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));
01033     if (pad < 20) // smallest fill item possible
01034         return pad + KAG_SIZE;
01035     else
01036         return pad & (KAG_SIZE-1);
01037 }
01038 
01039 static void mxf_write_index_table_segment(AVFormatContext *s)
01040 {
01041     MXFContext *mxf = s->priv_data;
01042     AVIOContext *pb = s->pb;
01043     int i, j, temporal_reordering = 0;
01044     int key_index = mxf->last_key_index;
01045 
01046     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);
01047 
01048     if (!mxf->edit_units_count && !mxf->edit_unit_byte_count)
01049         return;
01050 
01051     avio_write(pb, index_table_segment_key, 16);
01052 
01053     if (mxf->edit_unit_byte_count) {
01054         klv_encode_ber_length(pb, 80);
01055     } else {
01056         klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1)*6 +
01057                               12+mxf->edit_units_count*(11+mxf->slice_count*4));
01058     }
01059 
01060     // instance id
01061     mxf_write_local_tag(pb, 16, 0x3C0A);
01062     mxf_write_uuid(pb, IndexTableSegment, 0);
01063 
01064     // index edit rate
01065     mxf_write_local_tag(pb, 8, 0x3F0B);
01066     avio_wb32(pb, mxf->time_base.den);
01067     avio_wb32(pb, mxf->time_base.num);
01068 
01069     // index start position
01070     mxf_write_local_tag(pb, 8, 0x3F0C);
01071     avio_wb64(pb, mxf->last_indexed_edit_unit);
01072 
01073     // index duration
01074     mxf_write_local_tag(pb, 8, 0x3F0D);
01075     if (mxf->edit_unit_byte_count)
01076         avio_wb64(pb, 0); // index table covers whole container
01077     else
01078         avio_wb64(pb, mxf->edit_units_count);
01079 
01080     // edit unit byte count
01081     mxf_write_local_tag(pb, 4, 0x3F05);
01082     avio_wb32(pb, mxf->edit_unit_byte_count);
01083 
01084     // index sid
01085     mxf_write_local_tag(pb, 4, 0x3F06);
01086     avio_wb32(pb, 2);
01087 
01088     // body sid
01089     mxf_write_local_tag(pb, 4, 0x3F07);
01090     avio_wb32(pb, 1);
01091 
01092     if (!mxf->edit_unit_byte_count) {
01093         // real slice count - 1
01094         mxf_write_local_tag(pb, 1, 0x3F08);
01095         avio_w8(pb, mxf->slice_count);
01096 
01097         // delta entry array
01098         mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);
01099         avio_wb32(pb, s->nb_streams+1); // num of entries
01100         avio_wb32(pb, 6);               // size of one entry
01101         // write system item delta entry
01102         avio_w8(pb, 0);
01103         avio_w8(pb, 0); // slice entry
01104         avio_wb32(pb, 0); // element delta
01105         for (i = 0; i < s->nb_streams; i++) {
01106             AVStream *st = s->streams[i];
01107             MXFStreamContext *sc = st->priv_data;
01108             avio_w8(pb, sc->temporal_reordering);
01109             if (sc->temporal_reordering)
01110                 temporal_reordering = 1;
01111             if (i == 0) { // video track
01112                 avio_w8(pb, 0); // slice number
01113                 avio_wb32(pb, KAG_SIZE); // system item size including klv fill
01114             } else { // audio track
01115                 unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;
01116                 audio_frame_size += klv_fill_size(audio_frame_size);
01117                 avio_w8(pb, 1);
01118                 avio_wb32(pb, (i-1)*audio_frame_size); // element delta
01119             }
01120         }
01121 
01122         mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);
01123         avio_wb32(pb, mxf->edit_units_count);  // num of entries
01124         avio_wb32(pb, 11+mxf->slice_count*4);  // size of one entry
01125 
01126         for (i = 0; i < mxf->edit_units_count; i++) {
01127             int temporal_offset = 0;
01128 
01129             if (!(mxf->index_entries[i].flags & 0x33)) { // I frame
01130                 mxf->last_key_index = key_index;
01131                 key_index = i;
01132             }
01133 
01134             if (temporal_reordering) {
01135                 int pic_num_in_gop = i - key_index;
01136                 if (pic_num_in_gop != mxf->index_entries[i].temporal_ref) {
01137                     for (j = key_index; j < mxf->edit_units_count; j++) {
01138                         if (pic_num_in_gop == mxf->index_entries[j].temporal_ref)
01139                             break;
01140                     }
01141                     if (j == mxf->edit_units_count)
01142                         av_log(s, AV_LOG_WARNING, "missing frames\n");
01143                     temporal_offset = j - key_index - pic_num_in_gop;
01144                 }
01145             }
01146             avio_w8(pb, temporal_offset);
01147 
01148             if ((mxf->index_entries[i].flags & 0x30) == 0x30) { // back and forward prediction
01149                 avio_w8(pb, mxf->last_key_index - i);
01150             } else {
01151                 avio_w8(pb, key_index - i); // key frame offset
01152                 if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward
01153                     mxf->last_key_index = key_index;
01154             }
01155 
01156             if (!(mxf->index_entries[i].flags & 0x33) && // I frame
01157                 mxf->index_entries[i].flags & 0x40 && !temporal_offset)
01158                 mxf->index_entries[i].flags |= 0x80; // random access
01159             avio_w8(pb, mxf->index_entries[i].flags);
01160             // stream offset
01161             avio_wb64(pb, mxf->index_entries[i].offset);
01162             if (s->nb_streams > 1)
01163                 avio_wb32(pb, mxf->index_entries[i].slice_offset);
01164         }
01165 
01166         mxf->last_key_index = key_index - mxf->edit_units_count;
01167         mxf->last_indexed_edit_unit += mxf->edit_units_count;
01168         mxf->edit_units_count = 0;
01169     }
01170 }
01171 
01172 static void mxf_write_klv_fill(AVFormatContext *s)
01173 {
01174     unsigned pad = klv_fill_size(avio_tell(s->pb));
01175     if (pad) {
01176         avio_write(s->pb, klv_fill_key, 16);
01177         pad -= 16 + 4;
01178         klv_encode_ber4_length(s->pb, pad);
01179         for (; pad; pad--)
01180             avio_w8(s->pb, 0);
01181         assert(!(avio_tell(s->pb) & (KAG_SIZE-1)));
01182     }
01183 }
01184 
01185 static void mxf_write_partition(AVFormatContext *s, int bodysid,
01186                                 int indexsid,
01187                                 const uint8_t *key, int write_metadata)
01188 {
01189     MXFContext *mxf = s->priv_data;
01190     AVIOContext *pb = s->pb;
01191     int64_t header_byte_count_offset;
01192     unsigned index_byte_count = 0;
01193     uint64_t partition_offset = avio_tell(pb);
01194 
01195     if (!mxf->edit_unit_byte_count && mxf->edit_units_count)
01196         index_byte_count = 85 + 12+(s->nb_streams+1)*6 +
01197             12+mxf->edit_units_count*(11+mxf->slice_count*4);
01198     else if (mxf->edit_unit_byte_count && indexsid)
01199         index_byte_count = 80;
01200 
01201     if (index_byte_count) {
01202         // add encoded ber length
01203         index_byte_count += 16 + klv_ber_length(index_byte_count);
01204         index_byte_count += klv_fill_size(index_byte_count);
01205     }
01206 
01207     if (!memcmp(key, body_partition_key, 16)) {
01208         mxf->body_partition_offset =
01209             av_realloc(mxf->body_partition_offset,
01210                        (mxf->body_partitions_count+1)*
01211                        sizeof(*mxf->body_partition_offset));
01212         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;
01213     }
01214 
01215     // write klv
01216     avio_write(pb, key, 16);
01217     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);
01218 
01219     // write partition value
01220     avio_wb16(pb, 1); // majorVersion
01221     avio_wb16(pb, 2); // minorVersion
01222     avio_wb32(pb, KAG_SIZE); // KAGSize
01223 
01224     avio_wb64(pb, partition_offset); // ThisPartition
01225 
01226     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)
01227         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition
01228     else if (!memcmp(key, footer_partition_key, 16) && mxf->body_partitions_count)
01229         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition
01230     else
01231         avio_wb64(pb, 0);
01232 
01233     avio_wb64(pb, mxf->footer_partition_offset); // footerPartition
01234 
01235     // set offset
01236     header_byte_count_offset = avio_tell(pb);
01237     avio_wb64(pb, 0); // headerByteCount, update later
01238 
01239     // indexTable
01240     avio_wb64(pb, index_byte_count); // indexByteCount
01241     avio_wb32(pb, index_byte_count ? indexsid : 0); // indexSID
01242 
01243     // BodyOffset
01244     if (bodysid && mxf->edit_units_count && mxf->body_partitions_count) {
01245         avio_wb64(pb, mxf->body_offset);
01246     } else
01247         avio_wb64(pb, 0);
01248 
01249     avio_wb32(pb, bodysid); // bodySID
01250 
01251     // operational pattern
01252     avio_write(pb, op1a_ul, 16);
01253 
01254     // essence container
01255     mxf_write_essence_container_refs(s);
01256 
01257     if (write_metadata) {
01258         // mark the start of the headermetadata and calculate metadata size
01259         int64_t pos, start;
01260         unsigned header_byte_count;
01261 
01262         mxf_write_klv_fill(s);
01263         start = avio_tell(s->pb);
01264         mxf_write_primer_pack(s);
01265         mxf_write_header_metadata_sets(s);
01266         pos = avio_tell(s->pb);
01267         header_byte_count = pos - start + klv_fill_size(pos);
01268 
01269         // update header_byte_count
01270         avio_seek(pb, header_byte_count_offset, SEEK_SET);
01271         avio_wb64(pb, header_byte_count);
01272         avio_seek(pb, pos, SEEK_SET);
01273     }
01274 
01275     avio_flush(pb);
01276 }
01277 
01278 static const UID mxf_mpeg2_codec_uls[] = {
01279     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame
01280     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP
01281     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame
01282     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP
01283     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame
01284     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP
01285     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame
01286     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP
01287 };
01288 
01289 static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)
01290 {
01291     int long_gop = avctx->gop_size > 1 || avctx->has_b_frames;
01292 
01293     if (avctx->profile == 4) { // Main
01294         if (avctx->level == 8) // Main
01295             return &mxf_mpeg2_codec_uls[0+long_gop];
01296         else if (avctx->level == 4) // High
01297             return &mxf_mpeg2_codec_uls[4+long_gop];
01298     } else if (avctx->profile == 0) { // 422
01299         if (avctx->level == 5) // Main
01300             return &mxf_mpeg2_codec_uls[2+long_gop];
01301         else if (avctx->level == 2) // High
01302             return &mxf_mpeg2_codec_uls[6+long_gop];
01303     }
01304     return NULL;
01305 }
01306 
01307 static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st,
01308                                  AVPacket *pkt, MXFIndexEntry *e)
01309 {
01310     MXFStreamContext *sc = st->priv_data;
01311     MXFContext *mxf = s->priv_data;
01312     uint32_t c = -1;
01313     int i;
01314 
01315     for(i = 0; i < pkt->size - 4; i++) {
01316         c = (c<<8) + pkt->data[i];
01317         if (c == 0x1b5) {
01318             if ((pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
01319                 st->codec->profile = pkt->data[i+1] & 0x07;
01320                 st->codec->level   = pkt->data[i+2] >> 4;
01321             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext
01322                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame
01323                 break;
01324             }
01325         } else if (c == 0x1b8) { // gop
01326             if (pkt->data[i+4]>>6 & 0x01) { // closed
01327                 sc->closed_gop = 1;
01328                 if (e->flags & 0x40) // sequence header present
01329                     e->flags |= 0x80; // random access
01330             }
01331             if (!mxf->header_written) {
01332                 unsigned hours   =  (pkt->data[i+1]>>2) & 0x1f;
01333                 unsigned minutes = ((pkt->data[i+1] & 0x03) << 4) | (pkt->data[i+2]>>4);
01334                 unsigned seconds = ((pkt->data[i+2] & 0x07) << 3) | (pkt->data[i+3]>>5);
01335                 unsigned frames  = ((pkt->data[i+3] & 0x1f) << 1) | (pkt->data[i+4]>>7);
01336                 mxf->timecode_drop_frame = !!(pkt->data[i+1] & 0x80);
01337                 mxf->timecode_start = (hours*3600 + minutes*60 + seconds) *
01338                     mxf->timecode_base + frames;
01339                 if (mxf->timecode_drop_frame) {
01340                     unsigned tminutes = 60 * hours + minutes;
01341                     mxf->timecode_start -= 2 * (tminutes - tminutes / 10);
01342                 }
01343                 av_log(s, AV_LOG_DEBUG, "frame %d %d:%d:%d%c%d\n", mxf->timecode_start,
01344                        hours, minutes, seconds, mxf->timecode_drop_frame ? ';':':', frames);
01345             }
01346         } else if (c == 0x1b3) { // seq
01347             e->flags |= 0x40;
01348             switch ((pkt->data[i+4]>>4) & 0xf) {
01349             case 2:  sc->aspect_ratio = (AVRational){  4,  3}; break;
01350             case 3:  sc->aspect_ratio = (AVRational){ 16,  9}; break;
01351             case 4:  sc->aspect_ratio = (AVRational){221,100}; break;
01352             default:
01353                 av_reduce(&sc->aspect_ratio.num, &sc->aspect_ratio.den,
01354                           st->codec->width, st->codec->height, 1024*1024);
01355             }
01356         } else if (c == 0x100) { // pic
01357             int pict_type = (pkt->data[i+2]>>3) & 0x07;
01358             e->temporal_ref = (pkt->data[i+1]<<2) | (pkt->data[i+2]>>6);
01359             if (pict_type == 2) { // P frame
01360                 e->flags |= 0x22;
01361                 sc->closed_gop = 0; // reset closed gop, don't matter anymore
01362             } else if (pict_type == 3) { // B frame
01363                 if (sc->closed_gop)
01364                     e->flags |= 0x13; // only backward prediction
01365                 else
01366                     e->flags |= 0x33;
01367                 sc->temporal_reordering = -1;
01368             } else if (!pict_type) {
01369                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");
01370                 return 0;
01371             }
01372         }
01373     }
01374     if (s->oformat != &ff_mxf_d10_muxer)
01375         sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);
01376     return !!sc->codec_ul;
01377 }
01378 
01379 static uint64_t mxf_parse_timestamp(time_t timestamp)
01380 {
01381     struct tm *time = gmtime(&timestamp);
01382     if (!time)
01383         return 0;
01384     return (uint64_t)(time->tm_year+1900) << 48 |
01385            (uint64_t)(time->tm_mon+1)     << 40 |
01386            (uint64_t) time->tm_mday       << 32 |
01387                       time->tm_hour       << 24 |
01388                       time->tm_min        << 16 |
01389                       time->tm_sec        << 8;
01390 }
01391 
01392 static void mxf_gen_umid(AVFormatContext *s)
01393 {
01394     MXFContext *mxf = s->priv_data;
01395     uint32_t seed = av_get_random_seed();
01396     uint64_t umid = seed + 0x5294713400000000LL;
01397 
01398     AV_WB64(mxf->umid  , umid);
01399     AV_WB64(mxf->umid+8, umid>>8);
01400 
01401     mxf->instance_number = seed;
01402 }
01403 
01404 static int mxf_write_header(AVFormatContext *s)
01405 {
01406     MXFContext *mxf = s->priv_data;
01407     int i;
01408     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};
01409     const int *samples_per_frame = NULL;
01410 
01411     if (!s->nb_streams)
01412         return -1;
01413 
01414     for (i = 0; i < s->nb_streams; i++) {
01415         AVStream *st = s->streams[i];
01416         MXFStreamContext *sc = av_mallocz(sizeof(*sc));
01417         if (!sc)
01418             return AVERROR(ENOMEM);
01419         st->priv_data = sc;
01420 
01421         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
01422             if (i != 0) {
01423                 av_log(s, AV_LOG_ERROR, "video stream must be first track\n");
01424                 return -1;
01425             }
01426             if (fabs(av_q2d(st->codec->time_base) - 1/25.0) < 0.0001) {
01427                 samples_per_frame = PAL_samples_per_frame;
01428                 mxf->time_base = (AVRational){ 1, 25 };
01429                 mxf->timecode_base = 25;
01430             } else if (fabs(av_q2d(st->codec->time_base) - 1001/30000.0) < 0.0001) {
01431                 samples_per_frame = NTSC_samples_per_frame;
01432                 mxf->time_base = (AVRational){ 1001, 30000 };
01433                 mxf->timecode_base = 30;
01434             } else {
01435                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");
01436                 return -1;
01437             }
01438             av_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);
01439             if (s->oformat == &ff_mxf_d10_muxer) {
01440                 if (st->codec->bit_rate == 50000000)
01441                     if (mxf->time_base.den == 25) sc->index = 3;
01442                     else                          sc->index = 5;
01443                 else if (st->codec->bit_rate == 40000000)
01444                     if (mxf->time_base.den == 25) sc->index = 7;
01445                     else                          sc->index = 9;
01446                 else if (st->codec->bit_rate == 30000000)
01447                     if (mxf->time_base.den == 25) sc->index = 11;
01448                     else                          sc->index = 13;
01449                 else {
01450                     av_log(s, AV_LOG_ERROR, "error MXF D-10 only support 30/40/50 mbit/s\n");
01451                     return -1;
01452                 }
01453 
01454                 mxf->edit_unit_byte_count = KAG_SIZE; // system element
01455                 mxf->edit_unit_byte_count += 16 + 4 + (uint64_t)st->codec->bit_rate *
01456                     mxf->time_base.num / (8*mxf->time_base.den);
01457                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);
01458                 mxf->edit_unit_byte_count += 16 + 4 + 4 + samples_per_frame[0]*8*4;
01459                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);
01460             }
01461         } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
01462             if (st->codec->sample_rate != 48000) {
01463                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");
01464                 return -1;
01465             }
01466             av_set_pts_info(st, 64, 1, st->codec->sample_rate);
01467             if (s->oformat == &ff_mxf_d10_muxer) {
01468                 if (st->index != 1) {
01469                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support one audio track\n");
01470                     return -1;
01471                 }
01472                 if (st->codec->codec_id != CODEC_ID_PCM_S16LE &&
01473                     st->codec->codec_id != CODEC_ID_PCM_S24LE) {
01474                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support 16 or 24 bits le audio\n");
01475                 }
01476                 sc->index = ((MXFStreamContext*)s->streams[0]->priv_data)->index + 1;
01477             } else
01478             mxf->slice_count = 1;
01479         }
01480 
01481         if (!sc->index) {
01482             sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);
01483             if (sc->index == -1) {
01484                 av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "
01485                        "codec not currently supported in container\n", i);
01486                 return -1;
01487             }
01488         }
01489 
01490         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;
01491 
01492         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);
01493         sc->track_essence_element_key[15] = present[sc->index];
01494         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);
01495 
01496         if (!present[sc->index])
01497             mxf->essence_container_count++;
01498         present[sc->index]++;
01499     }
01500 
01501     if (s->oformat == &ff_mxf_d10_muxer) {
01502         mxf->essence_container_count = 1;
01503     }
01504 
01505     if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))
01506         mxf_gen_umid(s);
01507 
01508     for (i = 0; i < s->nb_streams; i++) {
01509         MXFStreamContext *sc = s->streams[i]->priv_data;
01510         // update element count
01511         sc->track_essence_element_key[13] = present[sc->index];
01512         sc->order = AV_RB32(sc->track_essence_element_key+12);
01513     }
01514 
01515     if (s->timestamp)
01516         mxf->timestamp = mxf_parse_timestamp(s->timestamp);
01517     mxf->duration = -1;
01518 
01519     mxf->timecode_track = av_mallocz(sizeof(*mxf->timecode_track));
01520     if (!mxf->timecode_track)
01521         return AVERROR(ENOMEM);
01522     mxf->timecode_track->priv_data = av_mallocz(sizeof(MXFStreamContext));
01523     if (!mxf->timecode_track->priv_data)
01524         return AVERROR(ENOMEM);
01525     mxf->timecode_track->index = -1;
01526 
01527     if (!samples_per_frame)
01528         samples_per_frame = PAL_samples_per_frame;
01529 
01530     if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)
01531         return -1;
01532 
01533     return 0;
01534 }
01535 
01536 static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };
01537 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 };
01538 
01539 static uint32_t ff_framenum_to_12m_time_code(unsigned frame, int drop, int fps)
01540 {
01541     return (0                                    << 31) | // color frame flag
01542            (drop                                 << 30) | // drop  frame flag
01543            ( ((frame % fps) / 10)                << 28) | // tens  of frames
01544            ( ((frame % fps) % 10)                << 24) | // units of frames
01545            (0                                    << 23) | // field phase (NTSC), b0 (PAL)
01546            ((((frame / fps) % 60) / 10)          << 20) | // tens  of seconds
01547            ((((frame / fps) % 60) % 10)          << 16) | // units of seconds
01548            (0                                    << 15) | // b0 (NTSC), b2 (PAL)
01549            ((((frame / (fps * 60)) % 60) / 10)   << 12) | // tens  of minutes
01550            ((((frame / (fps * 60)) % 60) % 10)   <<  8) | // units of minutes
01551            (0                                    <<  7) | // b1
01552            (0                                    <<  6) | // b2 (NSC), field phase (PAL)
01553            ((((frame / (fps * 3600) % 24)) / 10) <<  4) | // tens  of hours
01554            (  (frame / (fps * 3600) % 24)) % 10;          // units of hours
01555 }
01556 
01557 static void mxf_write_system_item(AVFormatContext *s)
01558 {
01559     MXFContext *mxf = s->priv_data;
01560     AVIOContext *pb = s->pb;
01561     unsigned frame;
01562     uint32_t time_code;
01563 
01564     frame = mxf->timecode_start + mxf->last_indexed_edit_unit + mxf->edit_units_count;
01565 
01566     // write system metadata pack
01567     avio_write(pb, system_metadata_pack_key, 16);
01568     klv_encode_ber4_length(pb, 57);
01569     avio_w8(pb, 0x5c); // UL, user date/time stamp, picture and sound item present
01570     avio_w8(pb, 0x04); // content package rate
01571     avio_w8(pb, 0x00); // content package type
01572     avio_wb16(pb, 0x00); // channel handle
01573     avio_wb16(pb, frame); // continuity count
01574     if (mxf->essence_container_count > 1)
01575         avio_write(pb, multiple_desc_ul, 16);
01576     else {
01577         MXFStreamContext *sc = s->streams[0]->priv_data;
01578         avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
01579     }
01580     avio_w8(pb, 0);
01581     avio_wb64(pb, 0);
01582     avio_wb64(pb, 0); // creation date/time stamp
01583 
01584     avio_w8(pb, 0x81); // SMPTE 12M time code
01585     time_code = ff_framenum_to_12m_time_code(frame, mxf->timecode_drop_frame, mxf->timecode_base);
01586     avio_wb32(pb, time_code);
01587     avio_wb32(pb, 0); // binary group data
01588     avio_wb64(pb, 0);
01589 
01590     // write system metadata package set
01591     avio_write(pb, system_metadata_package_set_key, 16);
01592     klv_encode_ber4_length(pb, 35);
01593     avio_w8(pb, 0x83); // UMID
01594     avio_wb16(pb, 0x20);
01595     mxf_write_umid(s, 1);
01596 }
01597 
01598 static void mxf_write_d10_video_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
01599 {
01600     MXFContext *mxf = s->priv_data;
01601     AVIOContext *pb = s->pb;
01602     int packet_size = (uint64_t)st->codec->bit_rate*mxf->time_base.num /
01603         (8*mxf->time_base.den); // frame size
01604     int pad;
01605 
01606     packet_size += 16 + 4;
01607     packet_size += klv_fill_size(packet_size);
01608 
01609     klv_encode_ber4_length(pb, pkt->size);
01610     avio_write(pb, pkt->data, pkt->size);
01611 
01612     // ensure CBR muxing by padding to correct video frame size
01613     pad = packet_size - pkt->size - 16 - 4;
01614     if (pad > 20) {
01615         avio_write(s->pb, klv_fill_key, 16);
01616         pad -= 16 + 4;
01617         klv_encode_ber4_length(s->pb, pad);
01618         for (; pad; pad--)
01619             avio_w8(s->pb, 0);
01620         assert(!(avio_tell(s->pb) & (KAG_SIZE-1)));
01621     } else {
01622         av_log(s, AV_LOG_WARNING, "cannot fill d-10 video packet\n");
01623         for (; pad > 0; pad--)
01624             avio_w8(s->pb, 0);
01625     }
01626 }
01627 
01628 static void mxf_write_d10_audio_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
01629 {
01630     MXFContext *mxf = s->priv_data;
01631     AVIOContext *pb = s->pb;
01632     int frame_size = pkt->size / st->codec->block_align;
01633     uint8_t *samples = pkt->data;
01634     uint8_t *end = pkt->data + pkt->size;
01635     int i;
01636 
01637     klv_encode_ber4_length(pb, 4 + frame_size*4*8);
01638 
01639     avio_w8(pb, (frame_size == 1920 ? 0 : (mxf->edit_units_count-1) % 5 + 1));
01640     avio_wl16(pb, frame_size);
01641     avio_w8(pb, (1<<st->codec->channels)-1);
01642 
01643     while (samples < end) {
01644         for (i = 0; i < st->codec->channels; i++) {
01645             uint32_t sample;
01646             if (st->codec->codec_id == CODEC_ID_PCM_S24LE) {
01647                 sample = AV_RL24(samples)<< 4;
01648                 samples += 3;
01649             } else {
01650                 sample = AV_RL16(samples)<<12;
01651                 samples += 2;
01652             }
01653             avio_wl32(pb, sample | i);
01654         }
01655         for (; i < 8; i++)
01656             avio_wl32(pb, i);
01657     }
01658 }
01659 
01660 static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
01661 {
01662     MXFContext *mxf = s->priv_data;
01663     AVIOContext *pb = s->pb;
01664     AVStream *st = s->streams[pkt->stream_index];
01665     MXFStreamContext *sc = st->priv_data;
01666     MXFIndexEntry ie = {0};
01667 
01668     if (!mxf->edit_unit_byte_count && !(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {
01669         mxf->index_entries = av_realloc(mxf->index_entries,
01670             (mxf->edit_units_count + EDIT_UNITS_PER_BODY)*sizeof(*mxf->index_entries));
01671         if (!mxf->index_entries) {
01672             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");
01673             return -1;
01674         }
01675     }
01676 
01677     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
01678         if (!mxf_parse_mpeg2_frame(s, st, pkt, &ie)) {
01679             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
01680             return -1;
01681         }
01682     }
01683 
01684     if (!mxf->header_written) {
01685         if (mxf->edit_unit_byte_count) {
01686             mxf_write_partition(s, 1, 2, header_open_partition_key, 1);
01687             mxf_write_klv_fill(s);
01688             mxf_write_index_table_segment(s);
01689         } else {
01690             mxf_write_partition(s, 0, 0, header_open_partition_key, 1);
01691         }
01692         mxf->header_written = 1;
01693     }
01694 
01695     if (st->index == 0) {
01696         if (!mxf->edit_unit_byte_count &&
01697             (!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&
01698             !(ie.flags & 0x33)) { // I frame, Gop start
01699             mxf_write_klv_fill(s);
01700             mxf_write_partition(s, 1, 2, body_partition_key, 0);
01701 
01702             mxf_write_klv_fill(s);
01703             mxf_write_index_table_segment(s);
01704         }
01705 
01706         mxf_write_klv_fill(s);
01707         mxf_write_system_item(s);
01708 
01709         if (!mxf->edit_unit_byte_count) {
01710             mxf->index_entries[mxf->edit_units_count].offset = mxf->body_offset;
01711             mxf->index_entries[mxf->edit_units_count].flags = ie.flags;
01712             mxf->index_entries[mxf->edit_units_count].temporal_ref = ie.temporal_ref;
01713             mxf->body_offset += KAG_SIZE; // size of system element
01714         }
01715         mxf->edit_units_count++;
01716     } else if (!mxf->edit_unit_byte_count && st->index == 1) {
01717         mxf->index_entries[mxf->edit_units_count-1].slice_offset =
01718             mxf->body_offset - mxf->index_entries[mxf->edit_units_count-1].offset;
01719     }
01720 
01721     mxf_write_klv_fill(s);
01722     avio_write(pb, sc->track_essence_element_key, 16); // write key
01723     if (s->oformat == &ff_mxf_d10_muxer) {
01724         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
01725             mxf_write_d10_video_packet(s, st, pkt);
01726         else
01727             mxf_write_d10_audio_packet(s, st, pkt);
01728     } else {
01729         klv_encode_ber4_length(pb, pkt->size); // write length
01730         avio_write(pb, pkt->data, pkt->size);
01731         mxf->body_offset += 16+4+pkt->size + klv_fill_size(16+4+pkt->size);
01732     }
01733 
01734     avio_flush(pb);
01735 
01736     return 0;
01737 }
01738 
01739 static void mxf_write_random_index_pack(AVFormatContext *s)
01740 {
01741     MXFContext *mxf = s->priv_data;
01742     AVIOContext *pb = s->pb;
01743     uint64_t pos = avio_tell(pb);
01744     int i;
01745 
01746     avio_write(pb, random_index_pack_key, 16);
01747     klv_encode_ber_length(pb, 28 + 12*mxf->body_partitions_count);
01748 
01749     if (mxf->edit_unit_byte_count)
01750         avio_wb32(pb, 1); // BodySID of header partition
01751     else
01752         avio_wb32(pb, 0);
01753     avio_wb64(pb, 0); // offset of header partition
01754 
01755     for (i = 0; i < mxf->body_partitions_count; i++) {
01756         avio_wb32(pb, 1); // BodySID
01757         avio_wb64(pb, mxf->body_partition_offset[i]);
01758     }
01759 
01760     avio_wb32(pb, 0); // BodySID of footer partition
01761     avio_wb64(pb, mxf->footer_partition_offset);
01762 
01763     avio_wb32(pb, avio_tell(pb) - pos + 4);
01764 }
01765 
01766 static int mxf_write_footer(AVFormatContext *s)
01767 {
01768     MXFContext *mxf = s->priv_data;
01769     AVIOContext *pb = s->pb;
01770 
01771     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;
01772 
01773     mxf_write_klv_fill(s);
01774     mxf->footer_partition_offset = avio_tell(pb);
01775     if (mxf->edit_unit_byte_count) { // no need to repeat index
01776         mxf_write_partition(s, 0, 0, footer_partition_key, 0);
01777     } else {
01778         mxf_write_partition(s, 0, 2, footer_partition_key, 0);
01779 
01780         mxf_write_klv_fill(s);
01781         mxf_write_index_table_segment(s);
01782     }
01783 
01784     mxf_write_klv_fill(s);
01785     mxf_write_random_index_pack(s);
01786 
01787     if (s->pb->seekable) {
01788         avio_seek(pb, 0, SEEK_SET);
01789         if (mxf->edit_unit_byte_count) {
01790             mxf_write_partition(s, 1, 2, header_closed_partition_key, 1);
01791             mxf_write_klv_fill(s);
01792             mxf_write_index_table_segment(s);
01793         } else {
01794             mxf_write_partition(s, 0, 0, header_closed_partition_key, 1);
01795         }
01796     }
01797 
01798     avio_flush(pb);
01799 
01800     ff_audio_interleave_close(s);
01801 
01802     av_freep(&mxf->index_entries);
01803     av_freep(&mxf->body_partition_offset);
01804     av_freep(&mxf->timecode_track->priv_data);
01805     av_freep(&mxf->timecode_track);
01806 
01807     mxf_free(s);
01808 
01809     return 0;
01810 }
01811 
01812 static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
01813 {
01814     int i, stream_count = 0;
01815 
01816     for (i = 0; i < s->nb_streams; i++)
01817         stream_count += !!s->streams[i]->last_in_packet_buffer;
01818 
01819     if (stream_count && (s->nb_streams == stream_count || flush)) {
01820         AVPacketList *pktl = s->packet_buffer;
01821         if (s->nb_streams != stream_count) {
01822             AVPacketList *last = NULL;
01823             // find last packet in edit unit
01824             while (pktl) {
01825                 if (!stream_count || pktl->pkt.stream_index == 0)
01826                     break;
01827                 last = pktl;
01828                 pktl = pktl->next;
01829                 stream_count--;
01830             }
01831             // purge packet queue
01832             while (pktl) {
01833                 AVPacketList *next = pktl->next;
01834 
01835                 if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)
01836                     s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;
01837                 av_free_packet(&pktl->pkt);
01838                 av_freep(&pktl);
01839                 pktl = next;
01840             }
01841             if (last)
01842                 last->next = NULL;
01843             else {
01844                 s->packet_buffer = NULL;
01845                 s->packet_buffer_end= NULL;
01846                 goto out;
01847             }
01848             pktl = s->packet_buffer;
01849         }
01850 
01851         *out = pktl->pkt;
01852         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);
01853         s->packet_buffer = pktl->next;
01854         if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)
01855             s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;
01856         if(!s->packet_buffer)
01857             s->packet_buffer_end= NULL;
01858         av_freep(&pktl);
01859         return 1;
01860     } else {
01861     out:
01862         av_init_packet(out);
01863         return 0;
01864     }
01865 }
01866 
01867 static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
01868 {
01869     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;
01870     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;
01871 
01872     return next->dts > pkt->dts ||
01873         (next->dts == pkt->dts && sc->order < sc2->order);
01874 }
01875 
01876 static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
01877 {
01878     return ff_audio_rechunk_interleave(s, out, pkt, flush,
01879                                mxf_interleave_get_packet, mxf_compare_timestamps);
01880 }
01881 
01882 AVOutputFormat ff_mxf_muxer = {
01883     "mxf",
01884     NULL_IF_CONFIG_SMALL("Material eXchange Format"),
01885     "application/mxf",
01886     "mxf",
01887     sizeof(MXFContext),
01888     CODEC_ID_PCM_S16LE,
01889     CODEC_ID_MPEG2VIDEO,
01890     mxf_write_header,
01891     mxf_write_packet,
01892     mxf_write_footer,
01893     AVFMT_NOTIMESTAMPS,
01894     NULL,
01895     mxf_interleave,
01896 };
01897 
01898 AVOutputFormat ff_mxf_d10_muxer = {
01899     "mxf_d10",
01900     NULL_IF_CONFIG_SMALL("Material eXchange Format, D-10 Mapping"),
01901     "application/mxf",
01902     NULL,
01903     sizeof(MXFContext),
01904     CODEC_ID_PCM_S16LE,
01905     CODEC_ID_MPEG2VIDEO,
01906     mxf_write_header,
01907     mxf_write_packet,
01908     mxf_write_footer,
01909     AVFMT_NOTIMESTAMPS,
01910     NULL,
01911     mxf_interleave,
01912 };