Replace FFmpeg with Libav in licence headers
[ffmpeg.git] / libavformat / mxfenc.c
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 Libav.
7  *
8  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22
23 /*
24  * References
25  * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
26  * SMPTE 377M MXF File Format Specifications
27  * SMPTE 379M MXF Generic Container
28  * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
29  * SMPTE RP210: SMPTE Metadata Dictionary
30  * SMPTE RP224: Registry of SMPTE Universal Labels
31  */
32
33 //#define DEBUG
34
35 #include <math.h>
36 #include <time.h>
37
38 #include "libavutil/random_seed.h"
39 #include "libavcodec/bytestream.h"
40 #include "audiointerleave.h"
41 #include "avformat.h"
42 #include "mxf.h"
43
44 static const int NTSC_samples_per_frame[] = { 1602, 1601, 1602, 1601, 1602, 0 };
45 static const int PAL_samples_per_frame[]  = { 1920, 0 };
46
47 extern AVOutputFormat ff_mxf_d10_muxer;
48
49 #define EDIT_UNITS_PER_BODY 250
50 #define KAG_SIZE 512
51
52 typedef struct {
53     int local_tag;
54     UID uid;
55 } MXFLocalTagPair;
56
57 typedef struct {
58     uint8_t flags;
59     uint64_t offset;
60     unsigned slice_offset; ///< offset of audio slice
61     uint16_t temporal_ref;
62 } MXFIndexEntry;
63
64 typedef struct {
65     AudioInterleaveContext aic;
66     UID track_essence_element_key;
67     int index;               ///< index in mxf_essence_container_uls table
68     const UID *codec_ul;
69     int order;               ///< interleaving order if dts are equal
70     int interlaced;          ///< wether picture is interlaced
71     int temporal_reordering;
72     AVRational aspect_ratio; ///< display aspect ratio
73     int closed_gop;          ///< gop is closed, used in mpeg-2 frame parsing
74 } MXFStreamContext;
75
76 typedef struct {
77     UID container_ul;
78     UID element_ul;
79     UID codec_ul;
80     void (*write_desc)(AVFormatContext *, AVStream *);
81 } MXFContainerEssenceEntry;
82
83 static const struct {
84     enum CodecID id;
85     int index;
86 } mxf_essence_mappings[] = {
87     { CODEC_ID_MPEG2VIDEO, 0 },
88     { CODEC_ID_PCM_S24LE,  1 },
89     { CODEC_ID_PCM_S16LE,  1 },
90     { CODEC_ID_NONE }
91 };
92
93 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st);
94 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st);
95 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st);
96 static void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st);
97 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st);
98
99 static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {
100     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },
101       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },
102       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },
103       mxf_write_mpegvideo_desc },
104     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },
105       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },
106       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
107       mxf_write_aes3_desc },
108     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },
109       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },
110       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
111       mxf_write_wav_desc },
112     // D-10 625/50 PAL 50mb/s
113     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },
114       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
115       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 },
116       mxf_write_cdci_desc },
117     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },
118       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
119       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
120       mxf_write_generic_sound_desc },
121     // D-10 525/60 NTSC 50mb/s
122     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },
123       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
124       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x02 },
125       mxf_write_cdci_desc },
126     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },
127       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
128       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
129       mxf_write_generic_sound_desc },
130     // D-10 625/50 PAL 40mb/s
131     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },
132       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
133       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x03 },
134       mxf_write_cdci_desc },
135     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },
136       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
137       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
138       mxf_write_generic_sound_desc },
139     // D-10 525/60 NTSC 40mb/s
140     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },
141       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
142       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x04 },
143       mxf_write_cdci_desc },
144     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },
145       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
146       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
147       mxf_write_generic_sound_desc },
148     // D-10 625/50 PAL 30mb/s
149     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },
150       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
151       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 },
152       mxf_write_cdci_desc },
153     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },
154       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
155       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
156       mxf_write_generic_sound_desc },
157     // D-10 525/60 NTSC 30mb/s
158     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },
159       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
160       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x06 },
161       mxf_write_cdci_desc },
162     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },
163       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
164       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
165       mxf_write_generic_sound_desc },
166     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
167       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
168       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
169       NULL },
170 };
171
172 typedef struct MXFContext {
173     int64_t footer_partition_offset;
174     int essence_container_count;
175     AVRational time_base;
176     int header_written;
177     MXFIndexEntry *index_entries;
178     unsigned edit_units_count;
179     uint64_t timestamp;   ///< timestamp, as year(16),month(8),day(8),hour(8),minutes(8),msec/4(8)
180     uint8_t slice_count;  ///< index slice count minus 1 (1 if no audio, 0 otherwise)
181     int last_indexed_edit_unit;
182     uint64_t *body_partition_offset;
183     unsigned body_partitions_count;
184     int last_key_index;  ///< index of last key frame
185     uint64_t duration;
186     AVStream *timecode_track;
187     int timecode_base;       ///< rounded time code base (25 or 30)
188     int timecode_start;      ///< frame number computed from mpeg-2 gop header timecode
189     int timecode_drop_frame; ///< time code use drop frame method frop mpeg-2 essence gop header
190     int edit_unit_byte_count; ///< fixed edit unit byte count
191     uint64_t body_offset;
192     uint32_t instance_number;
193     uint8_t umid[16];        ///< unique material identifier
194 } MXFContext;
195
196 static const uint8_t uuid_base[]            = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };
197 static const uint8_t umid_ul[]              = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x01,0x0D,0x00,0x13 };
198
199 /**
200  * complete key for operation pattern, partitions, and primer pack
201  */
202 static const uint8_t op1a_ul[]                     = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x09,0x00 };
203 static const uint8_t footer_partition_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }; // ClosedComplete
204 static const uint8_t primer_pack_key[]             = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x05,0x01,0x00 };
205 static const uint8_t index_table_segment_key[]     = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 };
206 static const uint8_t random_index_pack_key[]       = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
207 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
208 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
209 static const uint8_t klv_fill_key[]                = { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x03,0x01,0x02,0x10,0x01,0x00,0x00,0x00 };
210 static const uint8_t body_partition_key[]          = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }; // ClosedComplete
211
212 /**
213  * partial key for header metadata
214  */
215 static const uint8_t header_metadata_key[]  = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01 };
216 static const uint8_t multiple_desc_ul[]     = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x0D,0x01,0x03,0x01,0x02,0x7F,0x01,0x00 };
217
218 /**
219  * SMPTE RP210 http://www.smpte-ra.org/mdd/index.html
220  */
221 static const MXFLocalTagPair mxf_local_tag_batch[] = {
222     // preface set
223     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */
224     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */
225     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */
226     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */
227     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */
228     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */
229     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */
230     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */
231     // Identification
232     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */
233     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */
234     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */
235     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */
236     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */
237     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */
238     // Content Storage
239     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */
240     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */
241     // Essence Container Data
242     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */
243     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */
244     // Package
245     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */
246     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */
247     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */
248     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */
249     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */
250     // Track
251     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */
252     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */
253     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */
254     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */
255     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */
256     // Sequence
257     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */
258     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */
259     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */
260     // Source Clip
261     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */
262     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */
263     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */
264     // Timecode Component
265     { 0x1501, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x05,0x00,0x00}}, /* Start Time Code */
266     { 0x1502, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x04,0x01,0x01,0x02,0x06,0x00,0x00}}, /* Rounded Time Code Base */
267     { 0x1503, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x04,0x01,0x01,0x05,0x00,0x00,0x00}}, /* Drop Frame */
268     // File Descriptor
269     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */
270     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */
271     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */
272     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */
273     // Generic Picture Essence Descriptor
274     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */
275     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */
276     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */
277     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */
278     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */
279     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */
280     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */
281     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */
282     // CDCI Picture Essence Descriptor
283     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */
284     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */
285     // Generic Sound Essence Descriptor
286     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */
287     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */
288     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */
289     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */
290     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */
291     // Index Table Segment
292     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */
293     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */
294     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */
295     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */
296     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */
297     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */
298     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */
299     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */
300     // MPEG video Descriptor
301     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */
302     { 0x8007, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0A,0x00,0x00}}, /* ProfileAndLevel */
303     // Wave Audio Essence Descriptor
304     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */
305     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */
306 };
307
308 static void mxf_write_uuid(AVIOContext *pb, enum MXFMetadataSetType type, int value)
309 {
310     avio_write(pb, uuid_base, 12);
311     avio_wb16(pb, type);
312     avio_wb16(pb, value);
313 }
314
315 static void mxf_write_umid(AVFormatContext *s, int type)
316 {
317     MXFContext *mxf = s->priv_data;
318     avio_write(s->pb, umid_ul, 13);
319     avio_wb24(s->pb, mxf->instance_number);
320     avio_write(s->pb, mxf->umid, 15);
321     avio_w8(s->pb, type);
322 }
323
324 static void mxf_write_refs_count(AVIOContext *pb, int ref_count)
325 {
326     avio_wb32(pb, ref_count);
327     avio_wb32(pb, 16);
328 }
329
330 static int klv_ber_length(uint64_t len)
331 {
332     if (len < 128)
333         return 1;
334     else
335         return (av_log2(len) >> 3) + 2;
336 }
337
338 static int klv_encode_ber_length(AVIOContext *pb, uint64_t len)
339 {
340     // Determine the best BER size
341     int size;
342     if (len < 128) {
343         //short form
344         avio_w8(pb, len);
345         return 1;
346     }
347
348     size = (av_log2(len) >> 3) + 1;
349
350     // long form
351     avio_w8(pb, 0x80 + size);
352     while(size) {
353         size--;
354         avio_w8(pb, len >> 8 * size & 0xff);
355     }
356     return 0;
357 }
358
359 static void klv_encode_ber4_length(AVIOContext *pb, int len)
360 {
361     avio_w8(pb, 0x80 + 3);
362     avio_wb24(pb, len);
363 }
364
365 /*
366  * Get essence container ul index
367  */
368 static int mxf_get_essence_container_ul_index(enum CodecID id)
369 {
370     int i;
371     for (i = 0; mxf_essence_mappings[i].id; i++)
372         if (mxf_essence_mappings[i].id == id)
373             return mxf_essence_mappings[i].index;
374     return -1;
375 }
376
377 static void mxf_write_primer_pack(AVFormatContext *s)
378 {
379     AVIOContext *pb = s->pb;
380     int local_tag_number, i = 0;
381
382     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);
383
384     avio_write(pb, primer_pack_key, 16);
385     klv_encode_ber_length(pb, local_tag_number * 18 + 8);
386
387     avio_wb32(pb, local_tag_number); // local_tag num
388     avio_wb32(pb, 18); // item size, always 18 according to the specs
389
390     for (i = 0; i < local_tag_number; i++) {
391         avio_wb16(pb, mxf_local_tag_batch[i].local_tag);
392         avio_write(pb, mxf_local_tag_batch[i].uid, 16);
393     }
394 }
395
396 static void mxf_write_local_tag(AVIOContext *pb, int size, int tag)
397 {
398     avio_wb16(pb, tag);
399     avio_wb16(pb, size);
400 }
401
402 static void mxf_write_metadata_key(AVIOContext *pb, unsigned int value)
403 {
404     avio_write(pb, header_metadata_key, 13);
405     avio_wb24(pb, value);
406 }
407
408 static void mxf_free(AVFormatContext *s)
409 {
410     int i;
411
412     for (i = 0; i < s->nb_streams; i++) {
413         AVStream *st = s->streams[i];
414         av_freep(&st->priv_data);
415     }
416 }
417
418 static const MXFCodecUL *mxf_get_data_definition_ul(int type)
419 {
420     const MXFCodecUL *uls = ff_mxf_data_definition_uls;
421     while (uls->uid[0]) {
422         if (type == uls->id)
423             break;
424         uls++;
425     }
426     return uls;
427 }
428
429 static void mxf_write_essence_container_refs(AVFormatContext *s)
430 {
431     MXFContext *c = s->priv_data;
432     AVIOContext *pb = s->pb;
433     int i;
434
435     mxf_write_refs_count(pb, c->essence_container_count);
436     av_log(s,AV_LOG_DEBUG, "essence container count:%d\n", c->essence_container_count);
437     for (i = 0; i < c->essence_container_count; i++) {
438         MXFStreamContext *sc = s->streams[i]->priv_data;
439         avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
440     }
441 }
442
443 static void mxf_write_preface(AVFormatContext *s)
444 {
445     MXFContext *mxf = s->priv_data;
446     AVIOContext *pb = s->pb;
447
448     mxf_write_metadata_key(pb, 0x012f00);
449     PRINT_KEY(s, "preface key", pb->buf_ptr - 16);
450     klv_encode_ber_length(pb, 130 + 16 * mxf->essence_container_count);
451
452     // write preface set uid
453     mxf_write_local_tag(pb, 16, 0x3C0A);
454     mxf_write_uuid(pb, Preface, 0);
455     PRINT_KEY(s, "preface uid", pb->buf_ptr - 16);
456
457     // last modified date
458     mxf_write_local_tag(pb, 8, 0x3B02);
459     avio_wb64(pb, mxf->timestamp);
460
461     // write version
462     mxf_write_local_tag(pb, 2, 0x3B05);
463     avio_wb16(pb, 258); // v1.2
464
465     // write identification_refs
466     mxf_write_local_tag(pb, 16 + 8, 0x3B06);
467     mxf_write_refs_count(pb, 1);
468     mxf_write_uuid(pb, Identification, 0);
469
470     // write content_storage_refs
471     mxf_write_local_tag(pb, 16, 0x3B03);
472     mxf_write_uuid(pb, ContentStorage, 0);
473
474     // operational pattern
475     mxf_write_local_tag(pb, 16, 0x3B09);
476     avio_write(pb, op1a_ul, 16);
477
478     // write essence_container_refs
479     mxf_write_local_tag(pb, 8 + 16 * mxf->essence_container_count, 0x3B0A);
480     mxf_write_essence_container_refs(s);
481
482     // write dm_scheme_refs
483     mxf_write_local_tag(pb, 8, 0x3B0B);
484     avio_wb64(pb, 0);
485 }
486
487 /*
488  * Write a local tag containing an ascii string as utf-16
489  */
490 static void mxf_write_local_tag_utf16(AVIOContext *pb, int tag, const char *value)
491 {
492     int i, size = strlen(value);
493     mxf_write_local_tag(pb, size*2, tag);
494     for (i = 0; i < size; i++)
495         avio_wb16(pb, value[i]);
496 }
497
498 static void mxf_write_identification(AVFormatContext *s)
499 {
500     MXFContext *mxf = s->priv_data;
501     AVIOContext *pb = s->pb;
502     const char *company = "FFmpeg";
503     const char *product = "OP1a Muxer";
504     const char *version;
505     int length;
506
507     mxf_write_metadata_key(pb, 0x013000);
508     PRINT_KEY(s, "identification key", pb->buf_ptr - 16);
509
510     version = s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT ?
511         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);
512     length = 84 + (strlen(company)+strlen(product)+strlen(version))*2; // utf-16
513     klv_encode_ber_length(pb, length);
514
515     // write uid
516     mxf_write_local_tag(pb, 16, 0x3C0A);
517     mxf_write_uuid(pb, Identification, 0);
518     PRINT_KEY(s, "identification uid", pb->buf_ptr - 16);
519
520     // write generation uid
521     mxf_write_local_tag(pb, 16, 0x3C09);
522     mxf_write_uuid(pb, Identification, 1);
523
524     mxf_write_local_tag_utf16(pb, 0x3C01, company); // Company Name
525     mxf_write_local_tag_utf16(pb, 0x3C02, product); // Product Name
526     mxf_write_local_tag_utf16(pb, 0x3C04, version); // Version String
527
528     // write product uid
529     mxf_write_local_tag(pb, 16, 0x3C05);
530     mxf_write_uuid(pb, Identification, 2);
531
532     // modification date
533     mxf_write_local_tag(pb, 8, 0x3C06);
534     avio_wb64(pb, mxf->timestamp);
535 }
536
537 static void mxf_write_content_storage(AVFormatContext *s)
538 {
539     AVIOContext *pb = s->pb;
540
541     mxf_write_metadata_key(pb, 0x011800);
542     PRINT_KEY(s, "content storage key", pb->buf_ptr - 16);
543     klv_encode_ber_length(pb, 92);
544
545     // write uid
546     mxf_write_local_tag(pb, 16, 0x3C0A);
547     mxf_write_uuid(pb, ContentStorage, 0);
548     PRINT_KEY(s, "content storage uid", pb->buf_ptr - 16);
549
550     // write package reference
551     mxf_write_local_tag(pb, 16 * 2 + 8, 0x1901);
552     mxf_write_refs_count(pb, 2);
553     mxf_write_uuid(pb, MaterialPackage, 0);
554     mxf_write_uuid(pb, SourcePackage, 0);
555
556     // write essence container data
557     mxf_write_local_tag(pb, 8 + 16, 0x1902);
558     mxf_write_refs_count(pb, 1);
559     mxf_write_uuid(pb, EssenceContainerData, 0);
560 }
561
562 static void mxf_write_track(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
563 {
564     MXFContext *mxf = s->priv_data;
565     AVIOContext *pb = s->pb;
566     MXFStreamContext *sc = st->priv_data;
567
568     mxf_write_metadata_key(pb, 0x013b00);
569     PRINT_KEY(s, "track key", pb->buf_ptr - 16);
570     klv_encode_ber_length(pb, 80);
571
572     // write track uid
573     mxf_write_local_tag(pb, 16, 0x3C0A);
574     mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, st->index);
575     PRINT_KEY(s, "track uid", pb->buf_ptr - 16);
576
577     // write track id
578     mxf_write_local_tag(pb, 4, 0x4801);
579     avio_wb32(pb, st->index+2);
580
581     // write track number
582     mxf_write_local_tag(pb, 4, 0x4804);
583     if (type == MaterialPackage)
584         avio_wb32(pb, 0); // track number of material package is 0
585     else
586         avio_write(pb, sc->track_essence_element_key + 12, 4);
587
588     mxf_write_local_tag(pb, 8, 0x4B01);
589     avio_wb32(pb, mxf->time_base.den);
590     avio_wb32(pb, mxf->time_base.num);
591
592     // write origin
593     mxf_write_local_tag(pb, 8, 0x4B02);
594     avio_wb64(pb, 0);
595
596     // write sequence refs
597     mxf_write_local_tag(pb, 16, 0x4803);
598     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
599 }
600
601 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 };
602
603 static void mxf_write_common_fields(AVFormatContext *s, AVStream *st)
604 {
605     MXFContext *mxf = s->priv_data;
606     AVIOContext *pb = s->pb;
607
608     // find data define uls
609     mxf_write_local_tag(pb, 16, 0x0201);
610     if (st == mxf->timecode_track)
611         avio_write(pb, smpte_12m_timecode_track_data_ul, 16);
612     else {
613         const MXFCodecUL *data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);
614         avio_write(pb, data_def_ul->uid, 16);
615     }
616
617     // write duration
618     mxf_write_local_tag(pb, 8, 0x0202);
619     avio_wb64(pb, mxf->duration);
620 }
621
622 static void mxf_write_sequence(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
623 {
624     MXFContext *mxf = s->priv_data;
625     AVIOContext *pb = s->pb;
626     enum MXFMetadataSetType component;
627
628     mxf_write_metadata_key(pb, 0x010f00);
629     PRINT_KEY(s, "sequence key", pb->buf_ptr - 16);
630     klv_encode_ber_length(pb, 80);
631
632     mxf_write_local_tag(pb, 16, 0x3C0A);
633     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
634
635     PRINT_KEY(s, "sequence uid", pb->buf_ptr - 16);
636     mxf_write_common_fields(s, st);
637
638     // write structural component
639     mxf_write_local_tag(pb, 16 + 8, 0x1001);
640     mxf_write_refs_count(pb, 1);
641     if (st == mxf->timecode_track)
642         component = TimecodeComponent;
643     else
644         component = SourceClip;
645     if (type == SourcePackage)
646         component += TypeBottom;
647     mxf_write_uuid(pb, component, st->index);
648 }
649
650 static void mxf_write_timecode_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
651 {
652     MXFContext *mxf = s->priv_data;
653     AVIOContext *pb = s->pb;
654
655     mxf_write_metadata_key(pb, 0x011400);
656     klv_encode_ber_length(pb, 75);
657
658     // UID
659     mxf_write_local_tag(pb, 16, 0x3C0A);
660     mxf_write_uuid(pb, type == MaterialPackage ? TimecodeComponent :
661                    TimecodeComponent + TypeBottom, st->index);
662
663     mxf_write_common_fields(s, st);
664
665     // Start Time Code
666     mxf_write_local_tag(pb, 8, 0x1501);
667     avio_wb64(pb, mxf->timecode_start);
668
669     // Rounded Time Code Base
670     mxf_write_local_tag(pb, 2, 0x1502);
671     avio_wb16(pb, mxf->timecode_base);
672
673     // Drop Frame
674     mxf_write_local_tag(pb, 1, 0x1503);
675     avio_w8(pb, mxf->timecode_drop_frame);
676 }
677
678 static void mxf_write_structural_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
679 {
680     AVIOContext *pb = s->pb;
681     int i;
682
683     mxf_write_metadata_key(pb, 0x011100);
684     PRINT_KEY(s, "sturctural component key", pb->buf_ptr - 16);
685     klv_encode_ber_length(pb, 108);
686
687     // write uid
688     mxf_write_local_tag(pb, 16, 0x3C0A);
689     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
690
691     PRINT_KEY(s, "structural component uid", pb->buf_ptr - 16);
692     mxf_write_common_fields(s, st);
693
694     // write start_position
695     mxf_write_local_tag(pb, 8, 0x1201);
696     avio_wb64(pb, 0);
697
698     // write source package uid, end of the reference
699     mxf_write_local_tag(pb, 32, 0x1101);
700     if (type == SourcePackage) {
701         for (i = 0; i < 4; i++)
702             avio_wb64(pb, 0);
703     } else
704         mxf_write_umid(s, 1);
705
706     // write source track id
707     mxf_write_local_tag(pb, 4, 0x1102);
708     if (type == SourcePackage)
709         avio_wb32(pb, 0);
710     else
711         avio_wb32(pb, st->index+2);
712 }
713
714 static void mxf_write_multi_descriptor(AVFormatContext *s)
715 {
716     MXFContext *mxf = s->priv_data;
717     AVIOContext *pb = s->pb;
718     const uint8_t *ul;
719     int i;
720
721     mxf_write_metadata_key(pb, 0x014400);
722     PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);
723     klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);
724
725     mxf_write_local_tag(pb, 16, 0x3C0A);
726     mxf_write_uuid(pb, MultipleDescriptor, 0);
727     PRINT_KEY(s, "multi_desc uid", pb->buf_ptr - 16);
728
729     // write sample rate
730     mxf_write_local_tag(pb, 8, 0x3001);
731     avio_wb32(pb, mxf->time_base.den);
732     avio_wb32(pb, mxf->time_base.num);
733
734     // write essence container ul
735     mxf_write_local_tag(pb, 16, 0x3004);
736     if (mxf->essence_container_count > 1)
737         ul = multiple_desc_ul;
738     else {
739         MXFStreamContext *sc = s->streams[0]->priv_data;
740         ul = mxf_essence_container_uls[sc->index].container_ul;
741     }
742     avio_write(pb, ul, 16);
743
744     // write sub descriptor refs
745     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x3F01);
746     mxf_write_refs_count(pb, s->nb_streams);
747     for (i = 0; i < s->nb_streams; i++)
748         mxf_write_uuid(pb, SubDescriptor, i);
749 }
750
751 static void mxf_write_generic_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
752 {
753     MXFContext *mxf = s->priv_data;
754     MXFStreamContext *sc = st->priv_data;
755     AVIOContext *pb = s->pb;
756
757     avio_write(pb, key, 16);
758     klv_encode_ber4_length(pb, size+20+8+12+20);
759
760     mxf_write_local_tag(pb, 16, 0x3C0A);
761     mxf_write_uuid(pb, SubDescriptor, st->index);
762
763     mxf_write_local_tag(pb, 4, 0x3006);
764     avio_wb32(pb, st->index+2);
765
766     mxf_write_local_tag(pb, 8, 0x3001);
767     avio_wb32(pb, mxf->time_base.den);
768     avio_wb32(pb, mxf->time_base.num);
769
770     mxf_write_local_tag(pb, 16, 0x3004);
771     avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
772 }
773
774 static const UID mxf_mpegvideo_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 };
775 static const UID mxf_wav_descriptor_key       = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 };
776 static const UID mxf_aes3_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 };
777 static const UID mxf_cdci_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x28,0x00 };
778 static const UID mxf_generic_sound_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x42,0x00 };
779
780 static void mxf_write_cdci_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
781 {
782     MXFStreamContext *sc = st->priv_data;
783     AVIOContext *pb = s->pb;
784     int stored_height = (st->codec->height+15)/16*16;
785     int display_height;
786     int f1, f2;
787
788     mxf_write_generic_desc(s, st, key, size+8+8+8+8+8+8+5+16+sc->interlaced*4+12+20);
789
790     mxf_write_local_tag(pb, 4, 0x3203);
791     avio_wb32(pb, st->codec->width);
792
793     mxf_write_local_tag(pb, 4, 0x3202);
794     avio_wb32(pb, stored_height>>sc->interlaced);
795
796     mxf_write_local_tag(pb, 4, 0x3209);
797     avio_wb32(pb, st->codec->width);
798
799     if (st->codec->height == 608) // PAL + VBI
800         display_height = 576;
801     else if (st->codec->height == 512)  // NTSC + VBI
802         display_height = 486;
803     else
804         display_height = st->codec->height;
805
806     mxf_write_local_tag(pb, 4, 0x3208);
807     avio_wb32(pb, display_height>>sc->interlaced);
808
809     // component depth
810     mxf_write_local_tag(pb, 4, 0x3301);
811     avio_wb32(pb, 8);
812
813     // horizontal subsampling
814     mxf_write_local_tag(pb, 4, 0x3302);
815     avio_wb32(pb, 2);
816
817     // frame layout
818     mxf_write_local_tag(pb, 1, 0x320C);
819     avio_w8(pb, sc->interlaced);
820
821     // video line map
822     switch (st->codec->height) {
823     case  576: f1 = 23; f2 = 336; break;
824     case  608: f1 =  7; f2 = 320; break;
825     case  480: f1 = 20; f2 = 283; break;
826     case  512: f1 =  7; f2 = 270; break;
827     case  720: f1 = 26; f2 =   0; break; // progressive
828     case 1080: f1 = 21; f2 = 584; break;
829     default:   f1 =  0; f2 =   0; break;
830     }
831
832     if (!sc->interlaced) {
833         f2  = 0;
834         f1 *= 2;
835     }
836
837     mxf_write_local_tag(pb, 12+sc->interlaced*4, 0x320D);
838     avio_wb32(pb, sc->interlaced ? 2 : 1);
839     avio_wb32(pb, 4);
840     avio_wb32(pb, f1);
841     if (sc->interlaced)
842         avio_wb32(pb, f2);
843
844     mxf_write_local_tag(pb, 8, 0x320E);
845     avio_wb32(pb, sc->aspect_ratio.num);
846     avio_wb32(pb, sc->aspect_ratio.den);
847
848     mxf_write_local_tag(pb, 16, 0x3201);
849     avio_write(pb, *sc->codec_ul, 16);
850 }
851
852 static void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st)
853 {
854     mxf_write_cdci_common(s, st, mxf_cdci_descriptor_key, 0);
855 }
856
857 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
858 {
859     AVIOContext *pb = s->pb;
860     int profile_and_level = (st->codec->profile<<4) | st->codec->level;
861
862     mxf_write_cdci_common(s, st, mxf_mpegvideo_descriptor_key, 8+5);
863
864     // bit rate
865     mxf_write_local_tag(pb, 4, 0x8000);
866     avio_wb32(pb, st->codec->bit_rate);
867
868     // profile and level
869     mxf_write_local_tag(pb, 1, 0x8007);
870     if (!st->codec->profile)
871         profile_and_level |= 0x80; // escape bit
872     avio_w8(pb, profile_and_level);
873 }
874
875 static void mxf_write_generic_sound_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
876 {
877     AVIOContext *pb = s->pb;
878
879     mxf_write_generic_desc(s, st, key, size+5+12+8+8);
880
881     // audio locked
882     mxf_write_local_tag(pb, 1, 0x3D02);
883     avio_w8(pb, 1);
884
885     // write audio sampling rate
886     mxf_write_local_tag(pb, 8, 0x3D03);
887     avio_wb32(pb, st->codec->sample_rate);
888     avio_wb32(pb, 1);
889
890     mxf_write_local_tag(pb, 4, 0x3D07);
891     avio_wb32(pb, st->codec->channels);
892
893     mxf_write_local_tag(pb, 4, 0x3D01);
894     avio_wb32(pb, av_get_bits_per_sample(st->codec->codec_id));
895 }
896
897 static void mxf_write_wav_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
898 {
899     AVIOContext *pb = s->pb;
900
901     mxf_write_generic_sound_common(s, st, key, size+6+8);
902
903     mxf_write_local_tag(pb, 2, 0x3D0A);
904     avio_wb16(pb, st->codec->block_align);
905
906     // avg bytes per sec
907     mxf_write_local_tag(pb, 4, 0x3D09);
908     avio_wb32(pb, st->codec->block_align*st->codec->sample_rate);
909 }
910
911 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)
912 {
913     mxf_write_wav_common(s, st, mxf_wav_descriptor_key, 0);
914 }
915
916 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)
917 {
918     mxf_write_wav_common(s, st, mxf_aes3_descriptor_key, 0);
919 }
920
921 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st)
922 {
923     mxf_write_generic_sound_common(s, st, mxf_generic_sound_descriptor_key, 0);
924 }
925
926 static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)
927 {
928     MXFContext *mxf = s->priv_data;
929     AVIOContext *pb = s->pb;
930     int i, track_count = s->nb_streams+1;
931
932     if (type == MaterialPackage) {
933         mxf_write_metadata_key(pb, 0x013600);
934         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);
935         klv_encode_ber_length(pb, 92 + 16*track_count);
936     } else {
937         mxf_write_metadata_key(pb, 0x013700);
938         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);
939         klv_encode_ber_length(pb, 112 + 16*track_count); // 20 bytes length for descriptor reference
940     }
941
942     // write uid
943     mxf_write_local_tag(pb, 16, 0x3C0A);
944     mxf_write_uuid(pb, type, 0);
945     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);
946     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);
947
948     // write package umid
949     mxf_write_local_tag(pb, 32, 0x4401);
950     mxf_write_umid(s, type == SourcePackage);
951     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);
952
953     // package creation date
954     mxf_write_local_tag(pb, 8, 0x4405);
955     avio_wb64(pb, mxf->timestamp);
956
957     // package modified date
958     mxf_write_local_tag(pb, 8, 0x4404);
959     avio_wb64(pb, mxf->timestamp);
960
961     // write track refs
962     mxf_write_local_tag(pb, track_count*16 + 8, 0x4403);
963     mxf_write_refs_count(pb, track_count);
964     mxf_write_uuid(pb, type == MaterialPackage ? Track :
965                    Track + TypeBottom, -1); // timecode track
966     for (i = 0; i < s->nb_streams; i++)
967         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);
968
969     // write multiple descriptor reference
970     if (type == SourcePackage) {
971         mxf_write_local_tag(pb, 16, 0x4701);
972         if (s->nb_streams > 1) {
973             mxf_write_uuid(pb, MultipleDescriptor, 0);
974             mxf_write_multi_descriptor(s);
975         } else
976             mxf_write_uuid(pb, SubDescriptor, 0);
977     }
978
979     // write timecode track
980     mxf_write_track(s, mxf->timecode_track, type);
981     mxf_write_sequence(s, mxf->timecode_track, type);
982     mxf_write_timecode_component(s, mxf->timecode_track, type);
983
984     for (i = 0; i < s->nb_streams; i++) {
985         AVStream *st = s->streams[i];
986         mxf_write_track(s, st, type);
987         mxf_write_sequence(s, st, type);
988         mxf_write_structural_component(s, st, type);
989
990         if (type == SourcePackage) {
991             MXFStreamContext *sc = st->priv_data;
992             mxf_essence_container_uls[sc->index].write_desc(s, st);
993         }
994     }
995 }
996
997 static int mxf_write_essence_container_data(AVFormatContext *s)
998 {
999     AVIOContext *pb = s->pb;
1000
1001     mxf_write_metadata_key(pb, 0x012300);
1002     klv_encode_ber_length(pb, 72);
1003
1004     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID
1005     mxf_write_uuid(pb, EssenceContainerData, 0);
1006
1007     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID
1008     mxf_write_umid(s, 1);
1009
1010     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID
1011     avio_wb32(pb, 1);
1012
1013     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID
1014     avio_wb32(pb, 2);
1015
1016     return 0;
1017 }
1018
1019 static int mxf_write_header_metadata_sets(AVFormatContext *s)
1020 {
1021     mxf_write_preface(s);
1022     mxf_write_identification(s);
1023     mxf_write_content_storage(s);
1024     mxf_write_package(s, MaterialPackage);
1025     mxf_write_package(s, SourcePackage);
1026     mxf_write_essence_container_data(s);
1027     return 0;
1028 }
1029
1030 static unsigned klv_fill_size(uint64_t size)
1031 {
1032     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));
1033     if (pad < 20) // smallest fill item possible
1034         return pad + KAG_SIZE;
1035     else
1036         return pad & (KAG_SIZE-1);
1037 }
1038
1039 static void mxf_write_index_table_segment(AVFormatContext *s)
1040 {
1041     MXFContext *mxf = s->priv_data;
1042     AVIOContext *pb = s->pb;
1043     int i, j, temporal_reordering = 0;
1044     int key_index = mxf->last_key_index;
1045
1046     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);
1047
1048     if (!mxf->edit_units_count && !mxf->edit_unit_byte_count)
1049         return;
1050
1051     avio_write(pb, index_table_segment_key, 16);
1052
1053     if (mxf->edit_unit_byte_count) {
1054         klv_encode_ber_length(pb, 80);
1055     } else {
1056         klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1)*6 +
1057                               12+mxf->edit_units_count*(11+mxf->slice_count*4));
1058     }
1059
1060     // instance id
1061     mxf_write_local_tag(pb, 16, 0x3C0A);
1062     mxf_write_uuid(pb, IndexTableSegment, 0);
1063
1064     // index edit rate
1065     mxf_write_local_tag(pb, 8, 0x3F0B);
1066     avio_wb32(pb, mxf->time_base.den);
1067     avio_wb32(pb, mxf->time_base.num);
1068
1069     // index start position
1070     mxf_write_local_tag(pb, 8, 0x3F0C);
1071     avio_wb64(pb, mxf->last_indexed_edit_unit);
1072
1073     // index duration
1074     mxf_write_local_tag(pb, 8, 0x3F0D);
1075     if (mxf->edit_unit_byte_count)
1076         avio_wb64(pb, 0); // index table covers whole container
1077     else
1078         avio_wb64(pb, mxf->edit_units_count);
1079
1080     // edit unit byte count
1081     mxf_write_local_tag(pb, 4, 0x3F05);
1082     avio_wb32(pb, mxf->edit_unit_byte_count);
1083
1084     // index sid
1085     mxf_write_local_tag(pb, 4, 0x3F06);
1086     avio_wb32(pb, 2);
1087
1088     // body sid
1089     mxf_write_local_tag(pb, 4, 0x3F07);
1090     avio_wb32(pb, 1);
1091
1092     if (!mxf->edit_unit_byte_count) {
1093         // real slice count - 1
1094         mxf_write_local_tag(pb, 1, 0x3F08);
1095         avio_w8(pb, mxf->slice_count);
1096
1097         // delta entry array
1098         mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);
1099         avio_wb32(pb, s->nb_streams+1); // num of entries
1100         avio_wb32(pb, 6);               // size of one entry
1101         // write system item delta entry
1102         avio_w8(pb, 0);
1103         avio_w8(pb, 0); // slice entry
1104         avio_wb32(pb, 0); // element delta
1105         for (i = 0; i < s->nb_streams; i++) {
1106             AVStream *st = s->streams[i];
1107             MXFStreamContext *sc = st->priv_data;
1108             avio_w8(pb, sc->temporal_reordering);
1109             if (sc->temporal_reordering)
1110                 temporal_reordering = 1;
1111             if (i == 0) { // video track
1112                 avio_w8(pb, 0); // slice number
1113                 avio_wb32(pb, KAG_SIZE); // system item size including klv fill
1114             } else { // audio track
1115                 unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;
1116                 audio_frame_size += klv_fill_size(audio_frame_size);
1117                 avio_w8(pb, 1);
1118                 avio_wb32(pb, (i-1)*audio_frame_size); // element delta
1119             }
1120         }
1121
1122         mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);
1123         avio_wb32(pb, mxf->edit_units_count);  // num of entries
1124         avio_wb32(pb, 11+mxf->slice_count*4);  // size of one entry
1125
1126         for (i = 0; i < mxf->edit_units_count; i++) {
1127             int temporal_offset = 0;
1128
1129             if (!(mxf->index_entries[i].flags & 0x33)) { // I frame
1130                 mxf->last_key_index = key_index;
1131                 key_index = i;
1132             }
1133
1134             if (temporal_reordering) {
1135                 int pic_num_in_gop = i - key_index;
1136                 if (pic_num_in_gop != mxf->index_entries[i].temporal_ref) {
1137                     for (j = key_index; j < mxf->edit_units_count; j++) {
1138                         if (pic_num_in_gop == mxf->index_entries[j].temporal_ref)
1139                             break;
1140                     }
1141                     if (j == mxf->edit_units_count)
1142                         av_log(s, AV_LOG_WARNING, "missing frames\n");
1143                     temporal_offset = j - key_index - pic_num_in_gop;
1144                 }
1145             }
1146             avio_w8(pb, temporal_offset);
1147
1148             if ((mxf->index_entries[i].flags & 0x30) == 0x30) { // back and forward prediction
1149                 avio_w8(pb, mxf->last_key_index - i);
1150             } else {
1151                 avio_w8(pb, key_index - i); // key frame offset
1152                 if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward
1153                     mxf->last_key_index = key_index;
1154             }
1155
1156             if (!(mxf->index_entries[i].flags & 0x33) && // I frame
1157                 mxf->index_entries[i].flags & 0x40 && !temporal_offset)
1158                 mxf->index_entries[i].flags |= 0x80; // random access
1159             avio_w8(pb, mxf->index_entries[i].flags);
1160             // stream offset
1161             avio_wb64(pb, mxf->index_entries[i].offset);
1162             if (s->nb_streams > 1)
1163                 avio_wb32(pb, mxf->index_entries[i].slice_offset);
1164         }
1165
1166         mxf->last_key_index = key_index - mxf->edit_units_count;
1167         mxf->last_indexed_edit_unit += mxf->edit_units_count;
1168         mxf->edit_units_count = 0;
1169     }
1170 }
1171
1172 static void mxf_write_klv_fill(AVFormatContext *s)
1173 {
1174     unsigned pad = klv_fill_size(avio_tell(s->pb));
1175     if (pad) {
1176         avio_write(s->pb, klv_fill_key, 16);
1177         pad -= 16 + 4;
1178         klv_encode_ber4_length(s->pb, pad);
1179         for (; pad; pad--)
1180             avio_w8(s->pb, 0);
1181         assert(!(avio_tell(s->pb) & (KAG_SIZE-1)));
1182     }
1183 }
1184
1185 static void mxf_write_partition(AVFormatContext *s, int bodysid,
1186                                 int indexsid,
1187                                 const uint8_t *key, int write_metadata)
1188 {
1189     MXFContext *mxf = s->priv_data;
1190     AVIOContext *pb = s->pb;
1191     int64_t header_byte_count_offset;
1192     unsigned index_byte_count = 0;
1193     uint64_t partition_offset = avio_tell(pb);
1194
1195     if (!mxf->edit_unit_byte_count && mxf->edit_units_count)
1196         index_byte_count = 85 + 12+(s->nb_streams+1)*6 +
1197             12+mxf->edit_units_count*(11+mxf->slice_count*4);
1198     else if (mxf->edit_unit_byte_count && indexsid)
1199         index_byte_count = 80;
1200
1201     if (index_byte_count) {
1202         // add encoded ber length
1203         index_byte_count += 16 + klv_ber_length(index_byte_count);
1204         index_byte_count += klv_fill_size(index_byte_count);
1205     }
1206
1207     if (!memcmp(key, body_partition_key, 16)) {
1208         mxf->body_partition_offset =
1209             av_realloc(mxf->body_partition_offset,
1210                        (mxf->body_partitions_count+1)*
1211                        sizeof(*mxf->body_partition_offset));
1212         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;
1213     }
1214
1215     // write klv
1216     avio_write(pb, key, 16);
1217     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);
1218
1219     // write partition value
1220     avio_wb16(pb, 1); // majorVersion
1221     avio_wb16(pb, 2); // minorVersion
1222     avio_wb32(pb, KAG_SIZE); // KAGSize
1223
1224     avio_wb64(pb, partition_offset); // ThisPartition
1225
1226     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)
1227         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition
1228     else if (!memcmp(key, footer_partition_key, 16) && mxf->body_partitions_count)
1229         avio_wb64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition
1230     else
1231         avio_wb64(pb, 0);
1232
1233     avio_wb64(pb, mxf->footer_partition_offset); // footerPartition
1234
1235     // set offset
1236     header_byte_count_offset = avio_tell(pb);
1237     avio_wb64(pb, 0); // headerByteCount, update later
1238
1239     // indexTable
1240     avio_wb64(pb, index_byte_count); // indexByteCount
1241     avio_wb32(pb, index_byte_count ? indexsid : 0); // indexSID
1242
1243     // BodyOffset
1244     if (bodysid && mxf->edit_units_count && mxf->body_partitions_count) {
1245         avio_wb64(pb, mxf->body_offset);
1246     } else
1247         avio_wb64(pb, 0);
1248
1249     avio_wb32(pb, bodysid); // bodySID
1250
1251     // operational pattern
1252     avio_write(pb, op1a_ul, 16);
1253
1254     // essence container
1255     mxf_write_essence_container_refs(s);
1256
1257     if (write_metadata) {
1258         // mark the start of the headermetadata and calculate metadata size
1259         int64_t pos, start;
1260         unsigned header_byte_count;
1261
1262         mxf_write_klv_fill(s);
1263         start = avio_tell(s->pb);
1264         mxf_write_primer_pack(s);
1265         mxf_write_header_metadata_sets(s);
1266         pos = avio_tell(s->pb);
1267         header_byte_count = pos - start + klv_fill_size(pos);
1268
1269         // update header_byte_count
1270         avio_seek(pb, header_byte_count_offset, SEEK_SET);
1271         avio_wb64(pb, header_byte_count);
1272         avio_seek(pb, pos, SEEK_SET);
1273     }
1274
1275     avio_flush(pb);
1276 }
1277
1278 static const UID mxf_mpeg2_codec_uls[] = {
1279     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame
1280     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP
1281     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame
1282     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP
1283     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame
1284     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP
1285     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame
1286     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP
1287 };
1288
1289 static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)
1290 {
1291     int long_gop = avctx->gop_size > 1 || avctx->has_b_frames;
1292
1293     if (avctx->profile == 4) { // Main
1294         if (avctx->level == 8) // Main
1295             return &mxf_mpeg2_codec_uls[0+long_gop];
1296         else if (avctx->level == 4) // High
1297             return &mxf_mpeg2_codec_uls[4+long_gop];
1298     } else if (avctx->profile == 0) { // 422
1299         if (avctx->level == 5) // Main
1300             return &mxf_mpeg2_codec_uls[2+long_gop];
1301         else if (avctx->level == 2) // High
1302             return &mxf_mpeg2_codec_uls[6+long_gop];
1303     }
1304     return NULL;
1305 }
1306
1307 static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st,
1308                                  AVPacket *pkt, MXFIndexEntry *e)
1309 {
1310     MXFStreamContext *sc = st->priv_data;
1311     MXFContext *mxf = s->priv_data;
1312     uint32_t c = -1;
1313     int i;
1314
1315     for(i = 0; i < pkt->size - 4; i++) {
1316         c = (c<<8) + pkt->data[i];
1317         if (c == 0x1b5) {
1318             if ((pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
1319                 st->codec->profile = pkt->data[i+1] & 0x07;
1320                 st->codec->level   = pkt->data[i+2] >> 4;
1321             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext
1322                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame
1323                 break;
1324             }
1325         } else if (c == 0x1b8) { // gop
1326             if (pkt->data[i+4]>>6 & 0x01) { // closed
1327                 sc->closed_gop = 1;
1328                 if (e->flags & 0x40) // sequence header present
1329                     e->flags |= 0x80; // random access
1330             }
1331             if (!mxf->header_written) {
1332                 unsigned hours   =  (pkt->data[i+1]>>2) & 0x1f;
1333                 unsigned minutes = ((pkt->data[i+1] & 0x03) << 4) | (pkt->data[i+2]>>4);
1334                 unsigned seconds = ((pkt->data[i+2] & 0x07) << 3) | (pkt->data[i+3]>>5);
1335                 unsigned frames  = ((pkt->data[i+3] & 0x1f) << 1) | (pkt->data[i+4]>>7);
1336                 mxf->timecode_drop_frame = !!(pkt->data[i+1] & 0x80);
1337                 mxf->timecode_start = (hours*3600 + minutes*60 + seconds) *
1338                     mxf->timecode_base + frames;
1339                 if (mxf->timecode_drop_frame) {
1340                     unsigned tminutes = 60 * hours + minutes;
1341                     mxf->timecode_start -= 2 * (tminutes - tminutes / 10);
1342                 }
1343                 av_log(s, AV_LOG_DEBUG, "frame %d %d:%d:%d%c%d\n", mxf->timecode_start,
1344                        hours, minutes, seconds, mxf->timecode_drop_frame ? ';':':', frames);
1345             }
1346         } else if (c == 0x1b3) { // seq
1347             e->flags |= 0x40;
1348             switch ((pkt->data[i+4]>>4) & 0xf) {
1349             case 2:  sc->aspect_ratio = (AVRational){  4,  3}; break;
1350             case 3:  sc->aspect_ratio = (AVRational){ 16,  9}; break;
1351             case 4:  sc->aspect_ratio = (AVRational){221,100}; break;
1352             default:
1353                 av_reduce(&sc->aspect_ratio.num, &sc->aspect_ratio.den,
1354                           st->codec->width, st->codec->height, 1024*1024);
1355             }
1356         } else if (c == 0x100) { // pic
1357             int pict_type = (pkt->data[i+2]>>3) & 0x07;
1358             e->temporal_ref = (pkt->data[i+1]<<2) | (pkt->data[i+2]>>6);
1359             if (pict_type == 2) { // P frame
1360                 e->flags |= 0x22;
1361                 sc->closed_gop = 0; // reset closed gop, don't matter anymore
1362             } else if (pict_type == 3) { // B frame
1363                 if (sc->closed_gop)
1364                     e->flags |= 0x13; // only backward prediction
1365                 else
1366                     e->flags |= 0x33;
1367                 sc->temporal_reordering = -1;
1368             } else if (!pict_type) {
1369                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");
1370                 return 0;
1371             }
1372         }
1373     }
1374     if (s->oformat != &ff_mxf_d10_muxer)
1375         sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);
1376     return !!sc->codec_ul;
1377 }
1378
1379 static uint64_t mxf_parse_timestamp(time_t timestamp)
1380 {
1381     struct tm *time = gmtime(&timestamp);
1382     if (!time)
1383         return 0;
1384     return (uint64_t)(time->tm_year+1900) << 48 |
1385            (uint64_t)(time->tm_mon+1)     << 40 |
1386            (uint64_t) time->tm_mday       << 32 |
1387                       time->tm_hour       << 24 |
1388                       time->tm_min        << 16 |
1389                       time->tm_sec        << 8;
1390 }
1391
1392 static void mxf_gen_umid(AVFormatContext *s)
1393 {
1394     MXFContext *mxf = s->priv_data;
1395     uint32_t seed = av_get_random_seed();
1396     uint64_t umid = seed + 0x5294713400000000LL;
1397
1398     AV_WB64(mxf->umid  , umid);
1399     AV_WB64(mxf->umid+8, umid>>8);
1400
1401     mxf->instance_number = seed;
1402 }
1403
1404 static int mxf_write_header(AVFormatContext *s)
1405 {
1406     MXFContext *mxf = s->priv_data;
1407     int i;
1408     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};
1409     const int *samples_per_frame = NULL;
1410
1411     if (!s->nb_streams)
1412         return -1;
1413
1414     for (i = 0; i < s->nb_streams; i++) {
1415         AVStream *st = s->streams[i];
1416         MXFStreamContext *sc = av_mallocz(sizeof(*sc));
1417         if (!sc)
1418             return AVERROR(ENOMEM);
1419         st->priv_data = sc;
1420
1421         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1422             if (i != 0) {
1423                 av_log(s, AV_LOG_ERROR, "video stream must be first track\n");
1424                 return -1;
1425             }
1426             if (fabs(av_q2d(st->codec->time_base) - 1/25.0) < 0.0001) {
1427                 samples_per_frame = PAL_samples_per_frame;
1428                 mxf->time_base = (AVRational){ 1, 25 };
1429                 mxf->timecode_base = 25;
1430             } else if (fabs(av_q2d(st->codec->time_base) - 1001/30000.0) < 0.0001) {
1431                 samples_per_frame = NTSC_samples_per_frame;
1432                 mxf->time_base = (AVRational){ 1001, 30000 };
1433                 mxf->timecode_base = 30;
1434             } else {
1435                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");
1436                 return -1;
1437             }
1438             av_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);
1439             if (s->oformat == &ff_mxf_d10_muxer) {
1440                 if (st->codec->bit_rate == 50000000)
1441                     if (mxf->time_base.den == 25) sc->index = 3;
1442                     else                          sc->index = 5;
1443                 else if (st->codec->bit_rate == 40000000)
1444                     if (mxf->time_base.den == 25) sc->index = 7;
1445                     else                          sc->index = 9;
1446                 else if (st->codec->bit_rate == 30000000)
1447                     if (mxf->time_base.den == 25) sc->index = 11;
1448                     else                          sc->index = 13;
1449                 else {
1450                     av_log(s, AV_LOG_ERROR, "error MXF D-10 only support 30/40/50 mbit/s\n");
1451                     return -1;
1452                 }
1453
1454                 mxf->edit_unit_byte_count = KAG_SIZE; // system element
1455                 mxf->edit_unit_byte_count += 16 + 4 + (uint64_t)st->codec->bit_rate *
1456                     mxf->time_base.num / (8*mxf->time_base.den);
1457                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);
1458                 mxf->edit_unit_byte_count += 16 + 4 + 4 + samples_per_frame[0]*8*4;
1459                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);
1460             }
1461         } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1462             if (st->codec->sample_rate != 48000) {
1463                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");
1464                 return -1;
1465             }
1466             av_set_pts_info(st, 64, 1, st->codec->sample_rate);
1467             if (s->oformat == &ff_mxf_d10_muxer) {
1468                 if (st->index != 1) {
1469                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support one audio track\n");
1470                     return -1;
1471                 }
1472                 if (st->codec->codec_id != CODEC_ID_PCM_S16LE &&
1473                     st->codec->codec_id != CODEC_ID_PCM_S24LE) {
1474                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support 16 or 24 bits le audio\n");
1475                 }
1476                 sc->index = ((MXFStreamContext*)s->streams[0]->priv_data)->index + 1;
1477             } else
1478             mxf->slice_count = 1;
1479         }
1480
1481         if (!sc->index) {
1482             sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);
1483             if (sc->index == -1) {
1484                 av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "
1485                        "codec not currently supported in container\n", i);
1486                 return -1;
1487             }
1488         }
1489
1490         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;
1491
1492         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);
1493         sc->track_essence_element_key[15] = present[sc->index];
1494         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);
1495
1496         if (!present[sc->index])
1497             mxf->essence_container_count++;
1498         present[sc->index]++;
1499     }
1500
1501     if (s->oformat == &ff_mxf_d10_muxer) {
1502         mxf->essence_container_count = 1;
1503     }
1504
1505     if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))
1506         mxf_gen_umid(s);
1507
1508     for (i = 0; i < s->nb_streams; i++) {
1509         MXFStreamContext *sc = s->streams[i]->priv_data;
1510         // update element count
1511         sc->track_essence_element_key[13] = present[sc->index];
1512         sc->order = AV_RB32(sc->track_essence_element_key+12);
1513     }
1514
1515     if (s->timestamp)
1516         mxf->timestamp = mxf_parse_timestamp(s->timestamp);
1517     mxf->duration = -1;
1518
1519     mxf->timecode_track = av_mallocz(sizeof(*mxf->timecode_track));
1520     if (!mxf->timecode_track)
1521         return AVERROR(ENOMEM);
1522     mxf->timecode_track->priv_data = av_mallocz(sizeof(MXFStreamContext));
1523     if (!mxf->timecode_track->priv_data)
1524         return AVERROR(ENOMEM);
1525     mxf->timecode_track->index = -1;
1526
1527     if (!samples_per_frame)
1528         samples_per_frame = PAL_samples_per_frame;
1529
1530     if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)
1531         return -1;
1532
1533     return 0;
1534 }
1535
1536 static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };
1537 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 };
1538
1539 static uint32_t ff_framenum_to_12m_time_code(unsigned frame, int drop, int fps)
1540 {
1541     return (0                                    << 31) | // color frame flag
1542            (0                                    << 30) | // drop  frame flag
1543            ( ((frame % fps) / 10)                << 28) | // tens  of frames
1544            ( ((frame % fps) % 10)                << 24) | // units of frames
1545            (0                                    << 23) | // field phase (NTSC), b0 (PAL)
1546            ((((frame / fps) % 60) / 10)          << 20) | // tens  of seconds
1547            ((((frame / fps) % 60) % 10)          << 16) | // units of seconds
1548            (0                                    << 15) | // b0 (NTSC), b2 (PAL)
1549            ((((frame / (fps * 60)) % 60) / 10)   << 12) | // tens  of minutes
1550            ((((frame / (fps * 60)) % 60) % 10)   <<  8) | // units of minutes
1551            (0                                    <<  7) | // b1
1552            (0                                    <<  6) | // b2 (NSC), field phase (PAL)
1553            ((((frame / (fps * 3600) % 24)) / 10) <<  4) | // tens  of hours
1554            (  (frame / (fps * 3600) % 24)) % 10;          // units of hours
1555 }
1556
1557 static void mxf_write_system_item(AVFormatContext *s)
1558 {
1559     MXFContext *mxf = s->priv_data;
1560     AVIOContext *pb = s->pb;
1561     unsigned frame;
1562     uint32_t time_code;
1563
1564     frame = mxf->timecode_start + mxf->last_indexed_edit_unit + mxf->edit_units_count;
1565
1566     // write system metadata pack
1567     avio_write(pb, system_metadata_pack_key, 16);
1568     klv_encode_ber4_length(pb, 57);
1569     avio_w8(pb, 0x5c); // UL, user date/time stamp, picture and sound item present
1570     avio_w8(pb, 0x04); // content package rate
1571     avio_w8(pb, 0x00); // content package type
1572     avio_wb16(pb, 0x00); // channel handle
1573     avio_wb16(pb, frame); // continuity count
1574     if (mxf->essence_container_count > 1)
1575         avio_write(pb, multiple_desc_ul, 16);
1576     else {
1577         MXFStreamContext *sc = s->streams[0]->priv_data;
1578         avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
1579     }
1580     avio_w8(pb, 0);
1581     avio_wb64(pb, 0);
1582     avio_wb64(pb, 0); // creation date/time stamp
1583
1584     avio_w8(pb, 0x81); // SMPTE 12M time code
1585     time_code = ff_framenum_to_12m_time_code(frame, mxf->timecode_drop_frame, mxf->timecode_base);
1586     avio_wb32(pb, time_code);
1587     avio_wb32(pb, 0); // binary group data
1588     avio_wb64(pb, 0);
1589
1590     // write system metadata package set
1591     avio_write(pb, system_metadata_package_set_key, 16);
1592     klv_encode_ber4_length(pb, 35);
1593     avio_w8(pb, 0x83); // UMID
1594     avio_wb16(pb, 0x20);
1595     mxf_write_umid(s, 1);
1596 }
1597
1598 static void mxf_write_d10_video_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
1599 {
1600     MXFContext *mxf = s->priv_data;
1601     AVIOContext *pb = s->pb;
1602     int packet_size = (uint64_t)st->codec->bit_rate*mxf->time_base.num /
1603         (8*mxf->time_base.den); // frame size
1604     int pad;
1605
1606     packet_size += 16 + 4;
1607     packet_size += klv_fill_size(packet_size);
1608
1609     klv_encode_ber4_length(pb, pkt->size);
1610     avio_write(pb, pkt->data, pkt->size);
1611
1612     // ensure CBR muxing by padding to correct video frame size
1613     pad = packet_size - pkt->size - 16 - 4;
1614     if (pad > 20) {
1615         avio_write(s->pb, klv_fill_key, 16);
1616         pad -= 16 + 4;
1617         klv_encode_ber4_length(s->pb, pad);
1618         for (; pad; pad--)
1619             avio_w8(s->pb, 0);
1620         assert(!(avio_tell(s->pb) & (KAG_SIZE-1)));
1621     } else {
1622         av_log(s, AV_LOG_WARNING, "cannot fill d-10 video packet\n");
1623         for (; pad > 0; pad--)
1624             avio_w8(s->pb, 0);
1625     }
1626 }
1627
1628 static void mxf_write_d10_audio_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
1629 {
1630     MXFContext *mxf = s->priv_data;
1631     AVIOContext *pb = s->pb;
1632     int frame_size = pkt->size / st->codec->block_align;
1633     uint8_t *samples = pkt->data;
1634     uint8_t *end = pkt->data + pkt->size;
1635     int i;
1636
1637     klv_encode_ber4_length(pb, 4 + frame_size*4*8);
1638
1639     avio_w8(pb, (frame_size == 1920 ? 0 : (mxf->edit_units_count-1) % 5 + 1));
1640     avio_wl16(pb, frame_size);
1641     avio_w8(pb, (1<<st->codec->channels)-1);
1642
1643     while (samples < end) {
1644         for (i = 0; i < st->codec->channels; i++) {
1645             uint32_t sample;
1646             if (st->codec->codec_id == CODEC_ID_PCM_S24LE) {
1647                 sample = AV_RL24(samples)<< 4;
1648                 samples += 3;
1649             } else {
1650                 sample = AV_RL16(samples)<<12;
1651                 samples += 2;
1652             }
1653             avio_wl32(pb, sample | i);
1654         }
1655         for (; i < 8; i++)
1656             avio_wl32(pb, i);
1657     }
1658 }
1659
1660 static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
1661 {
1662     MXFContext *mxf = s->priv_data;
1663     AVIOContext *pb = s->pb;
1664     AVStream *st = s->streams[pkt->stream_index];
1665     MXFStreamContext *sc = st->priv_data;
1666     MXFIndexEntry ie = {0};
1667
1668     if (!mxf->edit_unit_byte_count && !(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {
1669         mxf->index_entries = av_realloc(mxf->index_entries,
1670             (mxf->edit_units_count + EDIT_UNITS_PER_BODY)*sizeof(*mxf->index_entries));
1671         if (!mxf->index_entries) {
1672             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");
1673             return -1;
1674         }
1675     }
1676
1677     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
1678         if (!mxf_parse_mpeg2_frame(s, st, pkt, &ie)) {
1679             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
1680             return -1;
1681         }
1682     }
1683
1684     if (!mxf->header_written) {
1685         if (mxf->edit_unit_byte_count) {
1686             mxf_write_partition(s, 1, 2, header_open_partition_key, 1);
1687             mxf_write_klv_fill(s);
1688             mxf_write_index_table_segment(s);
1689         } else {
1690             mxf_write_partition(s, 0, 0, header_open_partition_key, 1);
1691         }
1692         mxf->header_written = 1;
1693     }
1694
1695     if (st->index == 0) {
1696         if (!mxf->edit_unit_byte_count &&
1697             (!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&
1698             !(ie.flags & 0x33)) { // I frame, Gop start
1699             mxf_write_klv_fill(s);
1700             mxf_write_partition(s, 1, 2, body_partition_key, 0);
1701
1702             mxf_write_klv_fill(s);
1703             mxf_write_index_table_segment(s);
1704         }
1705
1706         mxf_write_klv_fill(s);
1707         mxf_write_system_item(s);
1708
1709         if (!mxf->edit_unit_byte_count) {
1710             mxf->index_entries[mxf->edit_units_count].offset = mxf->body_offset;
1711             mxf->index_entries[mxf->edit_units_count].flags = ie.flags;
1712             mxf->index_entries[mxf->edit_units_count].temporal_ref = ie.temporal_ref;
1713             mxf->body_offset += KAG_SIZE; // size of system element
1714         }
1715         mxf->edit_units_count++;
1716     } else if (!mxf->edit_unit_byte_count && st->index == 1) {
1717         mxf->index_entries[mxf->edit_units_count-1].slice_offset =
1718             mxf->body_offset - mxf->index_entries[mxf->edit_units_count-1].offset;
1719     }
1720
1721     mxf_write_klv_fill(s);
1722     avio_write(pb, sc->track_essence_element_key, 16); // write key
1723     if (s->oformat == &ff_mxf_d10_muxer) {
1724         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
1725             mxf_write_d10_video_packet(s, st, pkt);
1726         else
1727             mxf_write_d10_audio_packet(s, st, pkt);
1728     } else {
1729         klv_encode_ber4_length(pb, pkt->size); // write length
1730         avio_write(pb, pkt->data, pkt->size);
1731         mxf->body_offset += 16+4+pkt->size + klv_fill_size(16+4+pkt->size);
1732     }
1733
1734     avio_flush(pb);
1735
1736     return 0;
1737 }
1738
1739 static void mxf_write_random_index_pack(AVFormatContext *s)
1740 {
1741     MXFContext *mxf = s->priv_data;
1742     AVIOContext *pb = s->pb;
1743     uint64_t pos = avio_tell(pb);
1744     int i;
1745
1746     avio_write(pb, random_index_pack_key, 16);
1747     klv_encode_ber_length(pb, 28 + 12*mxf->body_partitions_count);
1748
1749     if (mxf->edit_unit_byte_count)
1750         avio_wb32(pb, 1); // BodySID of header partition
1751     else
1752         avio_wb32(pb, 0);
1753     avio_wb64(pb, 0); // offset of header partition
1754
1755     for (i = 0; i < mxf->body_partitions_count; i++) {
1756         avio_wb32(pb, 1); // BodySID
1757         avio_wb64(pb, mxf->body_partition_offset[i]);
1758     }
1759
1760     avio_wb32(pb, 0); // BodySID of footer partition
1761     avio_wb64(pb, mxf->footer_partition_offset);
1762
1763     avio_wb32(pb, avio_tell(pb) - pos + 4);
1764 }
1765
1766 static int mxf_write_footer(AVFormatContext *s)
1767 {
1768     MXFContext *mxf = s->priv_data;
1769     AVIOContext *pb = s->pb;
1770
1771     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;
1772
1773     mxf_write_klv_fill(s);
1774     mxf->footer_partition_offset = avio_tell(pb);
1775     if (mxf->edit_unit_byte_count) { // no need to repeat index
1776         mxf_write_partition(s, 0, 0, footer_partition_key, 0);
1777     } else {
1778         mxf_write_partition(s, 0, 2, footer_partition_key, 0);
1779
1780         mxf_write_klv_fill(s);
1781         mxf_write_index_table_segment(s);
1782     }
1783
1784     mxf_write_klv_fill(s);
1785     mxf_write_random_index_pack(s);
1786
1787     if (!url_is_streamed(s->pb)) {
1788         avio_seek(pb, 0, SEEK_SET);
1789         if (mxf->edit_unit_byte_count) {
1790             mxf_write_partition(s, 1, 2, header_closed_partition_key, 1);
1791             mxf_write_klv_fill(s);
1792             mxf_write_index_table_segment(s);
1793         } else {
1794             mxf_write_partition(s, 0, 0, header_closed_partition_key, 1);
1795         }
1796     }
1797
1798     avio_flush(pb);
1799
1800     ff_audio_interleave_close(s);
1801
1802     av_freep(&mxf->index_entries);
1803     av_freep(&mxf->body_partition_offset);
1804     av_freep(&mxf->timecode_track->priv_data);
1805     av_freep(&mxf->timecode_track);
1806
1807     mxf_free(s);
1808
1809     return 0;
1810 }
1811
1812 static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1813 {
1814     int i, stream_count = 0;
1815
1816     for (i = 0; i < s->nb_streams; i++)
1817         stream_count += !!s->streams[i]->last_in_packet_buffer;
1818
1819     if (stream_count && (s->nb_streams == stream_count || flush)) {
1820         AVPacketList *pktl = s->packet_buffer;
1821         if (s->nb_streams != stream_count) {
1822             AVPacketList *last = NULL;
1823             // find last packet in edit unit
1824             while (pktl) {
1825                 if (!stream_count || pktl->pkt.stream_index == 0)
1826                     break;
1827                 last = pktl;
1828                 pktl = pktl->next;
1829                 stream_count--;
1830             }
1831             // purge packet queue
1832             while (pktl) {
1833                 AVPacketList *next = pktl->next;
1834
1835                 if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)
1836                     s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;
1837                 av_free_packet(&pktl->pkt);
1838                 av_freep(&pktl);
1839                 pktl = next;
1840             }
1841             if (last)
1842                 last->next = NULL;
1843             else {
1844                 s->packet_buffer = NULL;
1845                 s->packet_buffer_end= NULL;
1846                 goto out;
1847             }
1848             pktl = s->packet_buffer;
1849         }
1850
1851         *out = pktl->pkt;
1852         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);
1853         s->packet_buffer = pktl->next;
1854         if(s->streams[pktl->pkt.stream_index]->last_in_packet_buffer == pktl)
1855             s->streams[pktl->pkt.stream_index]->last_in_packet_buffer= NULL;
1856         if(!s->packet_buffer)
1857             s->packet_buffer_end= NULL;
1858         av_freep(&pktl);
1859         return 1;
1860     } else {
1861     out:
1862         av_init_packet(out);
1863         return 0;
1864     }
1865 }
1866
1867 static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
1868 {
1869     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;
1870     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;
1871
1872     return next->dts > pkt->dts ||
1873         (next->dts == pkt->dts && sc->order < sc2->order);
1874 }
1875
1876 static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1877 {
1878     return ff_audio_rechunk_interleave(s, out, pkt, flush,
1879                                mxf_interleave_get_packet, mxf_compare_timestamps);
1880 }
1881
1882 AVOutputFormat ff_mxf_muxer = {
1883     "mxf",
1884     NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1885     "application/mxf",
1886     "mxf",
1887     sizeof(MXFContext),
1888     CODEC_ID_PCM_S16LE,
1889     CODEC_ID_MPEG2VIDEO,
1890     mxf_write_header,
1891     mxf_write_packet,
1892     mxf_write_footer,
1893     AVFMT_NOTIMESTAMPS,
1894     NULL,
1895     mxf_interleave,
1896 };
1897
1898 AVOutputFormat ff_mxf_d10_muxer = {
1899     "mxf_d10",
1900     NULL_IF_CONFIG_SMALL("Material eXchange Format, D-10 Mapping"),
1901     "application/mxf",
1902     NULL,
1903     sizeof(MXFContext),
1904     CODEC_ID_PCM_S16LE,
1905     CODEC_ID_MPEG2VIDEO,
1906     mxf_write_header,
1907     mxf_write_packet,
1908     mxf_write_footer,
1909     AVFMT_NOTIMESTAMPS,
1910     NULL,
1911     mxf_interleave,
1912 };