MXF D-10 muxer
[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 FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22
23 /*
24  * References
25  * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
26  * SMPTE 377M MXF File Format Specifications
27  * SMPTE 379M MXF Generic Container
28  * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
29  * SMPTE RP210: SMPTE Metadata Dictionary
30  * SMPTE RP224: Registry of SMPTE Universal Labels
31  */
32
33 //#define DEBUG
34
35 #include <math.h>
36 #include <time.h>
37
38 #include "libavutil/fifo.h"
39 #include "libavcodec/bytestream.h"
40 #include "audiointerleave.h"
41 #include "avformat.h"
42 #include "mxf.h"
43
44 static const int NTSC_samples_per_frame[] = { 1602, 1601, 1602, 1601, 1602, 0 };
45 static const int PAL_samples_per_frame[]  = { 1920, 0 };
46
47 AVOutputFormat 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 } MXFIndexEntry;
62
63 typedef struct {
64     AudioInterleaveContext aic;
65     UID track_essence_element_key;
66     int index;            ///< index in mxf_essence_container_uls table
67     const UID *codec_ul;
68     int order;            ///< interleaving order if dts are equal
69     int interlaced;       ///< wether picture is interlaced
70     int temporal_reordering;
71 } MXFStreamContext;
72
73 typedef struct {
74     UID container_ul;
75     UID element_ul;
76     UID codec_ul;
77     void (*write_desc)();
78 } MXFContainerEssenceEntry;
79
80 static const struct {
81     enum CodecID id;
82     int index;
83 } mxf_essence_mappings[] = {
84     { CODEC_ID_MPEG2VIDEO, 0 },
85     { CODEC_ID_PCM_S24LE,  1 },
86     { CODEC_ID_PCM_S16LE,  1 },
87     { 0 }
88 };
89
90 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st);
91 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st);
92 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st);
93 static void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st);
94 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st);
95
96 static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {
97     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },
98       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },
99       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },
100       mxf_write_mpegvideo_desc },
101     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },
102       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },
103       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
104       mxf_write_aes3_desc },
105     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },
106       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },
107       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
108       mxf_write_wav_desc },
109     // D-10 625/50 PAL 50mb/s
110     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },
111       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
112       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 },
113       mxf_write_cdci_desc },
114     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },
115       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
116       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
117       mxf_write_generic_sound_desc },
118     // D-10 525/60 NTSC 50mb/s
119     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },
120       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
121       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x02 },
122       mxf_write_cdci_desc },
123     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },
124       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
125       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
126       mxf_write_generic_sound_desc },
127     // D-10 625/50 PAL 40mb/s
128     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },
129       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
130       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x03 },
131       mxf_write_cdci_desc },
132     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },
133       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
134       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
135       mxf_write_generic_sound_desc },
136     // D-10 525/60 NTSC 40mb/s
137     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },
138       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
139       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x04 },
140       mxf_write_cdci_desc },
141     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },
142       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
143       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
144       mxf_write_generic_sound_desc },
145     // D-10 625/50 PAL 30mb/s
146     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },
147       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
148       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 },
149       mxf_write_cdci_desc },
150     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },
151       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
152       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
153       mxf_write_generic_sound_desc },
154     // D-10 525/60 NTSC 30mb/s
155     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },
156       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x05,0x01,0x01,0x00 },
157       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x06 },
158       mxf_write_cdci_desc },
159     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },
160       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x06,0x01,0x10,0x00 },
161       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
162       mxf_write_generic_sound_desc },
163     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
164       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
165       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
166       NULL },
167 };
168
169 typedef struct MXFContext {
170     int64_t footer_partition_offset;
171     int essence_container_count;
172     uint8_t essence_containers_indices[FF_ARRAY_ELEMS(mxf_essence_container_uls)];
173     AVRational time_base;
174     int header_written;
175     MXFIndexEntry *index_entries;
176     unsigned edit_units_count;
177     uint64_t timestamp;   ///< timestamp, as year(16),month(8),day(8),hour(8),minutes(8),msec/4(8)
178     uint8_t slice_count;  ///< index slice count minus 1 (1 if no audio, 0 otherwise)
179     int last_indexed_edit_unit;
180     uint64_t first_edit_unit_offset;
181     uint64_t *body_partition_offset;
182     unsigned body_partitions_count;
183     int last_key_index;  ///< index of last key frame
184     uint64_t duration;
185     AVStream *timecode_track;
186     int timecode_base;       ///< rounded time code base (25 or 30)
187     int timecode_start;      ///< frame number computed from mpeg-2 gop header timecode
188     int timecode_drop_frame; ///< time code use drop frame method frop mpeg-2 essence gop header
189     int edit_unit_byte_count; ///< fixed edit unit byte count
190 } MXFContext;
191
192 static const uint8_t uuid_base[]            = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };
193 static const uint8_t umid_base[]            = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x01,0x0D,0x00,0x13,0x00,0x00,0x00 };
194
195 /**
196  * complete key for operation pattern, partitions, and primer pack
197  */
198 static const uint8_t op1a_ul[]                     = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x01,0x00 };
199 static const uint8_t footer_partition_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }; // ClosedComplete
200 static const uint8_t primer_pack_key[]             = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x05,0x01,0x00 };
201 static const uint8_t index_table_segment_key[]     = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 };
202 static const uint8_t random_index_pack_key[]       = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
203 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
204 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
205 static const uint8_t klv_fill_key[]                = { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x03,0x01,0x02,0x10,0x01,0x00,0x00,0x00 };
206 static const uint8_t body_partition_key[]          = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }; // ClosedComplete
207
208 /**
209  * partial key for header metadata
210  */
211 static const uint8_t header_metadata_key[]  = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01 };
212 static const uint8_t multiple_desc_ul[]     = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x0D,0x01,0x03,0x01,0x02,0x7F,0x01,0x00 };
213
214 /**
215  * SMPTE RP210 http://www.smpte-ra.org/mdd/index.html
216  */
217 static const MXFLocalTagPair mxf_local_tag_batch[] = {
218     // preface set
219     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */
220     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */
221     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */
222     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */
223     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */
224     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */
225     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */
226     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */
227     // Identification
228     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */
229     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */
230     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */
231     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */
232     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */
233     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */
234     // Content Storage
235     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */
236     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */
237     // Essence Container Data
238     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */
239     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */
240     // Package
241     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */
242     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */
243     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */
244     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */
245     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */
246     // Track
247     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */
248     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */
249     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */
250     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */
251     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */
252     // Sequence
253     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */
254     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */
255     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */
256     // Source Clip
257     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */
258     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */
259     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */
260     // Timecode Component
261     { 0x1501, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x05,0x00,0x00}}, /* Start Time Code */
262     { 0x1502, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x04,0x01,0x01,0x02,0x06,0x00,0x00}}, /* Rounded Time Code Base */
263     { 0x1503, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x04,0x01,0x01,0x05,0x00,0x00,0x00}}, /* Drop Frame */
264     // File Descriptor
265     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */
266     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */
267     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */
268     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */
269     // Generic Picture Essence Descriptor
270     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */
271     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */
272     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */
273     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */
274     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */
275     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */
276     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */
277     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */
278     // CDCI Picture Essence Descriptor
279     { 0x3301, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x05,0x03,0x0A,0x00,0x00,0x00}}, /* Component Depth */
280     { 0x3302, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x05,0x00,0x00,0x00}}, /* Horizontal Subsampling */
281     // Generic Sound Essence Descriptor
282     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */
283     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */
284     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */
285     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */
286     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */
287     // Index Table Segment
288     { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */
289     { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */
290     { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */
291     { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */
292     { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */
293     { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */
294     { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */
295     { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */
296     // MPEG video Descriptor
297     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */
298     // Wave Audio Essence Descriptor
299     { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */
300     { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */
301 };
302
303 static void mxf_write_uuid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
304 {
305     put_buffer(pb, uuid_base, 12);
306     put_be16(pb, type);
307     put_be16(pb, value);
308 }
309
310 static void mxf_write_umid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
311 {
312     put_buffer(pb, umid_base, 16);
313     mxf_write_uuid(pb, type, value);
314 }
315
316 static void mxf_write_refs_count(ByteIOContext *pb, int ref_count)
317 {
318     put_be32(pb, ref_count);
319     put_be32(pb, 16);
320 }
321
322 static int klv_ber_length(uint64_t len)
323 {
324     if (len < 128)
325         return 1;
326     else
327         return (av_log2(len) >> 3) + 2;
328 }
329
330 static int klv_encode_ber_length(ByteIOContext *pb, uint64_t len)
331 {
332     // Determine the best BER size
333     int size;
334     if (len < 128) {
335         //short form
336         put_byte(pb, len);
337         return 1;
338     }
339
340     size = (av_log2(len) >> 3) + 1;
341
342     // long form
343     put_byte(pb, 0x80 + size);
344     while(size) {
345         size--;
346         put_byte(pb, len >> 8 * size & 0xff);
347     }
348     return 0;
349 }
350
351 static void klv_encode_ber4_length(ByteIOContext *pb, int len)
352 {
353     put_byte(pb, 0x80 + 3);
354     put_be24(pb, len);
355 }
356
357 /*
358  * Get essence container ul index
359  */
360 static int mxf_get_essence_container_ul_index(enum CodecID id)
361 {
362     int i;
363     for (i = 0; mxf_essence_mappings[i].id; i++)
364         if (mxf_essence_mappings[i].id == id)
365             return mxf_essence_mappings[i].index;
366     return -1;
367 }
368
369 static void mxf_write_primer_pack(AVFormatContext *s)
370 {
371     ByteIOContext *pb = s->pb;
372     int local_tag_number, i = 0;
373
374     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);
375
376     put_buffer(pb, primer_pack_key, 16);
377     klv_encode_ber_length(pb, local_tag_number * 18 + 8);
378
379     put_be32(pb, local_tag_number); // local_tag num
380     put_be32(pb, 18); // item size, always 18 according to the specs
381
382     for (i = 0; i < local_tag_number; i++) {
383         put_be16(pb, mxf_local_tag_batch[i].local_tag);
384         put_buffer(pb, mxf_local_tag_batch[i].uid, 16);
385     }
386 }
387
388 static void mxf_write_local_tag(ByteIOContext *pb, int size, int tag)
389 {
390     put_be16(pb, tag);
391     put_be16(pb, size);
392 }
393
394 static void mxf_write_metadata_key(ByteIOContext *pb, unsigned int value)
395 {
396     put_buffer(pb, header_metadata_key, 13);
397     put_be24(pb, value);
398 }
399
400 static void mxf_free(AVFormatContext *s)
401 {
402     int i;
403
404     for (i = 0; i < s->nb_streams; i++) {
405         AVStream *st = s->streams[i];
406         av_freep(&st->priv_data);
407     }
408 }
409
410 static const MXFCodecUL *mxf_get_data_definition_ul(int type)
411 {
412     const MXFCodecUL *uls = ff_mxf_data_definition_uls;
413     while (uls->uid[0]) {
414         if (type == uls->id)
415             break;
416         uls++;
417     }
418     return uls;
419 }
420
421 static void mxf_write_essence_container_refs(AVFormatContext *s)
422 {
423     MXFContext *c = s->priv_data;
424     ByteIOContext *pb = s->pb;
425     int i;
426
427     mxf_write_refs_count(pb, c->essence_container_count);
428     av_log(s,AV_LOG_DEBUG, "essence container count:%d\n", c->essence_container_count);
429     for (i = 0; i < c->essence_container_count; i++) {
430         put_buffer(pb, mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul, 16);
431         PRINT_KEY(s, "essence container ul:\n", mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul);
432     }
433 }
434
435 static void mxf_write_preface(AVFormatContext *s)
436 {
437     MXFContext *mxf = s->priv_data;
438     ByteIOContext *pb = s->pb;
439
440     mxf_write_metadata_key(pb, 0x012f00);
441     PRINT_KEY(s, "preface key", pb->buf_ptr - 16);
442     klv_encode_ber_length(pb, 130 + 16 * mxf->essence_container_count);
443
444     // write preface set uid
445     mxf_write_local_tag(pb, 16, 0x3C0A);
446     mxf_write_uuid(pb, Preface, 0);
447     PRINT_KEY(s, "preface uid", pb->buf_ptr - 16);
448
449     // last modified date
450     mxf_write_local_tag(pb, 8, 0x3B02);
451     put_be64(pb, mxf->timestamp);
452
453     // write version
454     mxf_write_local_tag(pb, 2, 0x3B05);
455     put_be16(pb, 1);
456
457     // write identification_refs
458     mxf_write_local_tag(pb, 16 + 8, 0x3B06);
459     mxf_write_refs_count(pb, 1);
460     mxf_write_uuid(pb, Identification, 0);
461
462     // write content_storage_refs
463     mxf_write_local_tag(pb, 16, 0x3B03);
464     mxf_write_uuid(pb, ContentStorage, 0);
465
466     // operational pattern
467     mxf_write_local_tag(pb, 16, 0x3B09);
468     if (s->nb_streams > 1) {
469         put_buffer(pb, op1a_ul, 14);
470         put_be16(pb, 0x0900); // multi track
471     } else {
472         put_buffer(pb, op1a_ul, 16);
473     }
474
475     // write essence_container_refs
476     mxf_write_local_tag(pb, 8 + 16 * mxf->essence_container_count, 0x3B0A);
477     mxf_write_essence_container_refs(s);
478
479     // write dm_scheme_refs
480     mxf_write_local_tag(pb, 8, 0x3B0B);
481     put_be64(pb, 0);
482 }
483
484 /*
485  * Write a local tag containing an ascii string as utf-16
486  */
487 static void mxf_write_local_tag_utf16(ByteIOContext *pb, int tag, const char *value)
488 {
489     int i, size = strlen(value);
490     mxf_write_local_tag(pb, size*2, tag);
491     for (i = 0; i < size; i++)
492         put_be16(pb, value[i]);
493 }
494
495 static void mxf_write_identification(AVFormatContext *s)
496 {
497     MXFContext *mxf = s->priv_data;
498     ByteIOContext *pb = s->pb;
499     const char *company = "FFmpeg";
500     const char *product = "OP1a Muxer";
501     const char *version;
502     int length;
503
504     mxf_write_metadata_key(pb, 0x013000);
505     PRINT_KEY(s, "identification key", pb->buf_ptr - 16);
506
507     version = s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT ?
508         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);
509     length = 84 + (strlen(company)+strlen(product)+strlen(version))*2; // utf-16
510     klv_encode_ber_length(pb, length);
511
512     // write uid
513     mxf_write_local_tag(pb, 16, 0x3C0A);
514     mxf_write_uuid(pb, Identification, 0);
515     PRINT_KEY(s, "identification uid", pb->buf_ptr - 16);
516
517     // write generation uid
518     mxf_write_local_tag(pb, 16, 0x3C09);
519     mxf_write_uuid(pb, Identification, 1);
520
521     mxf_write_local_tag_utf16(pb, 0x3C01, company); // Company Name
522     mxf_write_local_tag_utf16(pb, 0x3C02, product); // Product Name
523     mxf_write_local_tag_utf16(pb, 0x3C04, version); // Version String
524
525     // write product uid
526     mxf_write_local_tag(pb, 16, 0x3C05);
527     mxf_write_uuid(pb, Identification, 2);
528
529     // modification date
530     mxf_write_local_tag(pb, 8, 0x3C06);
531     put_be64(pb, mxf->timestamp);
532 }
533
534 static void mxf_write_content_storage(AVFormatContext *s)
535 {
536     ByteIOContext *pb = s->pb;
537
538     mxf_write_metadata_key(pb, 0x011800);
539     PRINT_KEY(s, "content storage key", pb->buf_ptr - 16);
540     klv_encode_ber_length(pb, 92);
541
542     // write uid
543     mxf_write_local_tag(pb, 16, 0x3C0A);
544     mxf_write_uuid(pb, ContentStorage, 0);
545     PRINT_KEY(s, "content storage uid", pb->buf_ptr - 16);
546
547     // write package reference
548     mxf_write_local_tag(pb, 16 * 2 + 8, 0x1901);
549     mxf_write_refs_count(pb, 2);
550     mxf_write_uuid(pb, MaterialPackage, 0);
551     mxf_write_uuid(pb, SourcePackage, 0);
552
553     // write essence container data
554     mxf_write_local_tag(pb, 8 + 16, 0x1902);
555     mxf_write_refs_count(pb, 1);
556     mxf_write_uuid(pb, EssenceContainerData, 0);
557 }
558
559 static void mxf_write_track(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
560 {
561     MXFContext *mxf = s->priv_data;
562     ByteIOContext *pb = s->pb;
563     MXFStreamContext *sc = st->priv_data;
564
565     mxf_write_metadata_key(pb, 0x013b00);
566     PRINT_KEY(s, "track key", pb->buf_ptr - 16);
567     klv_encode_ber_length(pb, 80);
568
569     // write track uid
570     mxf_write_local_tag(pb, 16, 0x3C0A);
571     mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, st->index);
572     PRINT_KEY(s, "track uid", pb->buf_ptr - 16);
573
574     // write track id
575     mxf_write_local_tag(pb, 4, 0x4801);
576     put_be32(pb, st->index);
577
578     // write track number
579     mxf_write_local_tag(pb, 4, 0x4804);
580     if (type == MaterialPackage)
581         put_be32(pb, 0); // track number of material package is 0
582     else
583         put_buffer(pb, sc->track_essence_element_key + 12, 4);
584
585     mxf_write_local_tag(pb, 8, 0x4B01);
586     put_be32(pb, mxf->time_base.den);
587     put_be32(pb, mxf->time_base.num);
588
589     // write origin
590     mxf_write_local_tag(pb, 8, 0x4B02);
591     put_be64(pb, 0);
592
593     // write sequence refs
594     mxf_write_local_tag(pb, 16, 0x4803);
595     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
596 }
597
598 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 };
599
600 static void mxf_write_common_fields(AVFormatContext *s, AVStream *st)
601 {
602     MXFContext *mxf = s->priv_data;
603     ByteIOContext *pb = s->pb;
604
605     // find data define uls
606     mxf_write_local_tag(pb, 16, 0x0201);
607     if (st == mxf->timecode_track)
608         put_buffer(pb, smpte_12m_timecode_track_data_ul, 16);
609     else {
610         const MXFCodecUL *data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);
611         put_buffer(pb, data_def_ul->uid, 16);
612     }
613
614     // write duration
615     mxf_write_local_tag(pb, 8, 0x0202);
616     put_be64(pb, mxf->duration);
617 }
618
619 static void mxf_write_sequence(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
620 {
621     MXFContext *mxf = s->priv_data;
622     ByteIOContext *pb = s->pb;
623     enum MXFMetadataSetType component;
624
625     mxf_write_metadata_key(pb, 0x010f00);
626     PRINT_KEY(s, "sequence key", pb->buf_ptr - 16);
627     klv_encode_ber_length(pb, 80);
628
629     mxf_write_local_tag(pb, 16, 0x3C0A);
630     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
631
632     PRINT_KEY(s, "sequence uid", pb->buf_ptr - 16);
633     mxf_write_common_fields(s, st);
634
635     // write structural component
636     mxf_write_local_tag(pb, 16 + 8, 0x1001);
637     mxf_write_refs_count(pb, 1);
638     if (st == mxf->timecode_track)
639         component = TimecodeComponent;
640     else if (type == MaterialPackage)
641         component = SourceClip;
642     else
643         component = SourceClip+TypeBottom;
644     mxf_write_uuid(pb, component, st->index);
645 }
646
647 static void mxf_write_timecode_component(AVFormatContext *s, AVStream *st)
648 {
649     MXFContext *mxf = s->priv_data;
650     ByteIOContext *pb = s->pb;
651
652     mxf_write_metadata_key(pb, 0x011400);
653     klv_encode_ber_length(pb, 75);
654
655     // UID
656     mxf_write_local_tag(pb, 16, 0x3C0A);
657     mxf_write_uuid(pb, TimecodeComponent, st->index);
658
659     mxf_write_common_fields(s, st);
660
661     // Start Time Code
662     mxf_write_local_tag(pb, 8, 0x1501);
663     put_be64(pb, mxf->timecode_start);
664
665     // Rounded Time Code Base
666     mxf_write_local_tag(pb, 2, 0x1502);
667     put_be16(pb, mxf->timecode_base);
668
669     // Drop Frame
670     mxf_write_local_tag(pb, 1, 0x1503);
671     put_byte(pb, mxf->timecode_drop_frame);
672 }
673
674 static void mxf_write_structural_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
675 {
676     ByteIOContext *pb = s->pb;
677     int i;
678
679     mxf_write_metadata_key(pb, 0x011100);
680     PRINT_KEY(s, "sturctural component key", pb->buf_ptr - 16);
681     klv_encode_ber_length(pb, 108);
682
683     // write uid
684     mxf_write_local_tag(pb, 16, 0x3C0A);
685     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
686
687     PRINT_KEY(s, "structural component uid", pb->buf_ptr - 16);
688     mxf_write_common_fields(s, st);
689
690     // write start_position
691     mxf_write_local_tag(pb, 8, 0x1201);
692     put_be64(pb, 0);
693
694     // write source package uid, end of the reference
695     mxf_write_local_tag(pb, 32, 0x1101);
696     if (type == SourcePackage) {
697         for (i = 0; i < 4; i++)
698             put_be64(pb, 0);
699     } else
700         mxf_write_umid(pb, SourcePackage, 0);
701
702     // write source track id
703     mxf_write_local_tag(pb, 4, 0x1102);
704     if (type == SourcePackage)
705         put_be32(pb, 0);
706     else
707         put_be32(pb, st->index);
708 }
709
710 static void mxf_write_multi_descriptor(AVFormatContext *s)
711 {
712     MXFContext *mxf = s->priv_data;
713     ByteIOContext *pb = s->pb;
714     const uint8_t *ul;
715     int i;
716
717     mxf_write_metadata_key(pb, 0x014400);
718     PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);
719     klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);
720
721     mxf_write_local_tag(pb, 16, 0x3C0A);
722     mxf_write_uuid(pb, MultipleDescriptor, 0);
723     PRINT_KEY(s, "multi_desc uid", pb->buf_ptr - 16);
724
725     // write sample rate
726     mxf_write_local_tag(pb, 8, 0x3001);
727     put_be32(pb, mxf->time_base.den);
728     put_be32(pb, mxf->time_base.num);
729
730     // write essence container ul
731     mxf_write_local_tag(pb, 16, 0x3004);
732     if (mxf->essence_container_count > 1)
733         ul = multiple_desc_ul;
734     else
735         ul = mxf_essence_container_uls[mxf->essence_containers_indices[0]].container_ul;
736     put_buffer(pb, ul, 16);
737
738     // write sub descriptor refs
739     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x3F01);
740     mxf_write_refs_count(pb, s->nb_streams);
741     for (i = 0; i < s->nb_streams; i++)
742         mxf_write_uuid(pb, SubDescriptor, i);
743 }
744
745 static void mxf_write_generic_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
746 {
747     MXFContext *mxf = s->priv_data;
748     MXFStreamContext *sc = st->priv_data;
749     ByteIOContext *pb = s->pb;
750
751     put_buffer(pb, key, 16);
752     klv_encode_ber_length(pb, size);
753
754     mxf_write_local_tag(pb, 16, 0x3C0A);
755     mxf_write_uuid(pb, SubDescriptor, st->index);
756
757     mxf_write_local_tag(pb, 4, 0x3006);
758     put_be32(pb, st->index);
759
760     mxf_write_local_tag(pb, 8, 0x3001);
761     put_be32(pb, mxf->time_base.den);
762     put_be32(pb, mxf->time_base.num);
763
764     mxf_write_local_tag(pb, 16, 0x3004);
765     put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
766 }
767
768 static const UID mxf_mpegvideo_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 };
769 static const UID mxf_wav_descriptor_key       = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 };
770 static const UID mxf_aes3_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 };
771 static const UID mxf_cdci_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x28,0x00 };
772 static const UID mxf_generic_sound_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x42,0x00 };
773
774 static void mxf_write_cdci_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
775 {
776     MXFStreamContext *sc = st->priv_data;
777     ByteIOContext *pb = s->pb;
778     int stored_height = (st->codec->height+15)/16*16;
779     int display_height;
780     AVRational dar;
781     int f1, f2;
782
783     mxf_write_generic_desc(s, st, key, size);
784
785     mxf_write_local_tag(pb, 4, 0x3203);
786     put_be32(pb, st->codec->width);
787
788     mxf_write_local_tag(pb, 4, 0x3202);
789     put_be32(pb, stored_height>>sc->interlaced);
790
791     mxf_write_local_tag(pb, 4, 0x3209);
792     put_be32(pb, st->codec->width);
793
794     if (st->codec->height == 608) // PAL + VBI
795         display_height = 576;
796     else if (st->codec->height == 512)  // NTSC + VBI
797         display_height = 486;
798     else
799         display_height = st->codec->height;
800
801     mxf_write_local_tag(pb, 4, 0x3208);
802     put_be32(pb, display_height>>sc->interlaced);
803
804     // component depth
805     mxf_write_local_tag(pb, 4, 0x3301);
806     put_be32(pb, 8);
807
808     // horizontal subsampling
809     mxf_write_local_tag(pb, 4, 0x3302);
810     put_be32(pb, 2);
811
812     // frame layout
813     mxf_write_local_tag(pb, 1, 0x320C);
814     put_byte(pb, sc->interlaced);
815
816     // video line map
817     switch (st->codec->height) {
818     case  576: f1 = 23; f2 = 336; break;
819     case  608: f1 =  7; f2 = 320; break;
820     case  480: f1 = 20; f2 = 283; break;
821     case  512: f1 =  7; f2 = 270; break;
822     case  720: f1 = 26; f2 =   0; break; // progressive
823     case 1080: f1 = 21; f2 = 584; break;
824     default:   f1 =  0; f2 =   0; break;
825     }
826
827     if (!sc->interlaced) {
828         f2  = 0;
829         f1 *= 2;
830     }
831
832     mxf_write_local_tag(pb, 12+sc->interlaced*4, 0x320D);
833     put_be32(pb, sc->interlaced ? 2 : 1);
834     put_be32(pb, 4);
835     put_be32(pb, f1);
836     if (sc->interlaced)
837         put_be32(pb, f2);
838
839     av_reduce(&dar.num, &dar.den,
840               st->codec->width*st->codec->sample_aspect_ratio.num,
841               st->codec->height*st->codec->sample_aspect_ratio.den,
842               1024*1024);
843
844     mxf_write_local_tag(pb, 8, 0x320E);
845     put_be32(pb, dar.num);
846     put_be32(pb, dar.den);
847
848     mxf_write_local_tag(pb, 16, 0x3201);
849     put_buffer(pb, *sc->codec_ul, 16);
850 }
851
852 static void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st)
853 {
854     MXFStreamContext *sc = st->priv_data;
855     mxf_write_cdci_common(s, st, mxf_cdci_descriptor_key, 161+sc->interlaced*4);
856 }
857
858 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
859 {
860     MXFStreamContext *sc = st->priv_data;
861     ByteIOContext *pb = s->pb;
862
863     mxf_write_cdci_common(s, st, mxf_mpegvideo_descriptor_key, 169+sc->interlaced*4);
864
865     // bit rate
866     mxf_write_local_tag(pb, 4, 0x8000);
867     put_be32(pb, st->codec->bit_rate);
868 }
869
870 static void mxf_write_generic_sound_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
871 {
872     ByteIOContext *pb = s->pb;
873
874     mxf_write_generic_desc(s, st, key, size);
875
876     // audio locked
877     mxf_write_local_tag(pb, 1, 0x3D02);
878     put_byte(pb, 1);
879
880     // write audio sampling rate
881     mxf_write_local_tag(pb, 8, 0x3D03);
882     put_be32(pb, st->codec->sample_rate);
883     put_be32(pb, 1);
884
885     mxf_write_local_tag(pb, 4, 0x3D07);
886     put_be32(pb, st->codec->channels);
887
888     mxf_write_local_tag(pb, 4, 0x3D01);
889     put_be32(pb, av_get_bits_per_sample(st->codec->codec_id));
890 }
891
892 static void mxf_write_wav_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
893 {
894     ByteIOContext *pb = s->pb;
895
896     mxf_write_generic_sound_common(s, st, key, size);
897
898     mxf_write_local_tag(pb, 2, 0x3D0A);
899     put_be16(pb, st->codec->block_align);
900
901     // avg bytes per sec
902     mxf_write_local_tag(pb, 4, 0x3D09);
903     put_be32(pb, st->codec->block_align*st->codec->sample_rate);
904 }
905
906 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)
907 {
908     mxf_write_wav_common(s, st, mxf_wav_descriptor_key, 107);
909 }
910
911 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)
912 {
913     mxf_write_wav_common(s, st, mxf_aes3_descriptor_key, 107);
914 }
915
916 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st)
917 {
918     mxf_write_generic_sound_common(s, st, mxf_generic_sound_descriptor_key, 93);
919 }
920
921 static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)
922 {
923     MXFContext *mxf = s->priv_data;
924     ByteIOContext *pb = s->pb;
925     int i, track_count;
926
927     if (type == MaterialPackage) {
928         track_count = s->nb_streams + 1; // add timecode track
929         mxf_write_metadata_key(pb, 0x013600);
930         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);
931         klv_encode_ber_length(pb, 92 + 16*track_count);
932     } else {
933         track_count = s->nb_streams;
934         mxf_write_metadata_key(pb, 0x013700);
935         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);
936         klv_encode_ber_length(pb, 112 + 16*track_count); // 20 bytes length for descriptor reference
937     }
938
939     // write uid
940     mxf_write_local_tag(pb, 16, 0x3C0A);
941     mxf_write_uuid(pb, type, 0);
942     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);
943     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);
944
945     // write package umid
946     mxf_write_local_tag(pb, 32, 0x4401);
947     mxf_write_umid(pb, type, 0);
948     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);
949
950     // package creation date
951     mxf_write_local_tag(pb, 8, 0x4405);
952     put_be64(pb, mxf->timestamp);
953
954     // package modified date
955     mxf_write_local_tag(pb, 8, 0x4404);
956     put_be64(pb, mxf->timestamp);
957
958     // write track refs
959     mxf_write_local_tag(pb, track_count*16 + 8, 0x4403);
960     mxf_write_refs_count(pb, track_count);
961     for (i = 0; i < s->nb_streams; i++)
962         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);
963     if (type == MaterialPackage)
964         mxf_write_uuid(pb, Track, s->nb_streams); // timecode track
965
966     // write multiple descriptor reference
967     if (type == SourcePackage) {
968         mxf_write_local_tag(pb, 16, 0x4701);
969         if (s->nb_streams > 1) {
970             mxf_write_uuid(pb, MultipleDescriptor, 0);
971             mxf_write_multi_descriptor(s);
972         } else
973             mxf_write_uuid(pb, SubDescriptor, 0);
974     } else {
975         // write timecode track
976         mxf_write_track(s, mxf->timecode_track, type);
977         mxf_write_sequence(s, mxf->timecode_track, type);
978         mxf_write_timecode_component(s, mxf->timecode_track);
979     }
980
981     for (i = 0; i < s->nb_streams; i++) {
982         AVStream *st = s->streams[i];
983         mxf_write_track(s, st, type);
984         mxf_write_sequence(s, st, type);
985         mxf_write_structural_component(s, st, type);
986
987         if (type == SourcePackage) {
988             MXFStreamContext *sc = st->priv_data;
989             mxf_essence_container_uls[sc->index].write_desc(s, st);
990         }
991     }
992 }
993
994 static int mxf_write_essence_container_data(AVFormatContext *s)
995 {
996     ByteIOContext *pb = s->pb;
997
998     mxf_write_metadata_key(pb, 0x012300);
999     klv_encode_ber_length(pb, 72);
1000
1001     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID
1002     mxf_write_uuid(pb, EssenceContainerData, 0);
1003
1004     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID
1005     mxf_write_umid(pb, SourcePackage, 0);
1006
1007     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID
1008     put_be32(pb, 1);
1009
1010     mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID
1011     put_be32(pb, 2);
1012
1013     return 0;
1014 }
1015
1016 static int mxf_write_header_metadata_sets(AVFormatContext *s)
1017 {
1018     mxf_write_preface(s);
1019     mxf_write_identification(s);
1020     mxf_write_content_storage(s);
1021     mxf_write_package(s, MaterialPackage);
1022     mxf_write_package(s, SourcePackage);
1023     mxf_write_essence_container_data(s);
1024     return 0;
1025 }
1026
1027 static unsigned klv_fill_size(uint64_t size)
1028 {
1029     unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));
1030     if (pad < 20) // smallest fill item possible
1031         return pad + KAG_SIZE;
1032     else
1033         return pad & (KAG_SIZE-1);
1034 }
1035
1036 static void mxf_write_index_table_segment(AVFormatContext *s)
1037 {
1038     MXFContext *mxf = s->priv_data;
1039     ByteIOContext *pb = s->pb;
1040     int i, j;
1041     int temporal_reordering = 0;
1042     int key_index = mxf->last_key_index;
1043
1044     av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);
1045
1046     if (!mxf->edit_units_count && !mxf->edit_unit_byte_count)
1047         return;
1048
1049     put_buffer(pb, index_table_segment_key, 16);
1050
1051     if (mxf->edit_unit_byte_count) {
1052         klv_encode_ber_length(pb, 85);
1053     } else {
1054         klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1)*6 +
1055                               12+mxf->edit_units_count*(11+mxf->slice_count*4));
1056     }
1057
1058     // instance id
1059     mxf_write_local_tag(pb, 16, 0x3C0A);
1060     mxf_write_uuid(pb, IndexTableSegment, 0);
1061
1062     // index edit rate
1063     mxf_write_local_tag(pb, 8, 0x3F0B);
1064     put_be32(pb, mxf->time_base.num);
1065     put_be32(pb, mxf->time_base.den);
1066
1067     // index start position
1068     mxf_write_local_tag(pb, 8, 0x3F0C);
1069     put_be64(pb, mxf->last_indexed_edit_unit);
1070
1071     // index duration
1072     mxf_write_local_tag(pb, 8, 0x3F0D);
1073     put_be64(pb, mxf->edit_units_count);
1074
1075     // edit unit byte count
1076     mxf_write_local_tag(pb, 4, 0x3F05);
1077     put_be32(pb, mxf->edit_unit_byte_count);
1078
1079     // index sid
1080     mxf_write_local_tag(pb, 4, 0x3F06);
1081     put_be32(pb, 2);
1082
1083     // body sid
1084     mxf_write_local_tag(pb, 4, 0x3F07);
1085     put_be32(pb, 1);
1086
1087     // real slice count - 1
1088     mxf_write_local_tag(pb, 1, 0x3F08);
1089     put_byte(pb, mxf->slice_count);
1090
1091     if (!mxf->edit_unit_byte_count) {
1092     // delta entry array
1093     mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);
1094     put_be32(pb, s->nb_streams+1); // num of entries
1095     put_be32(pb, 6);             // size of one entry
1096     // write system item delta entry
1097     put_byte(pb, 0);
1098     put_byte(pb, 0); // slice entry
1099     put_be32(pb, 0); // element delta
1100     for (i = 0; i < s->nb_streams; i++) {
1101         AVStream *st = s->streams[i];
1102         MXFStreamContext *sc = st->priv_data;
1103         put_byte(pb, sc->temporal_reordering);
1104         if (sc->temporal_reordering)
1105             temporal_reordering = 1;
1106         // slice number
1107         if (i == 0) { // video track
1108             put_byte(pb, 0); // slice number
1109             put_be32(pb, KAG_SIZE); // system item size including klv fill
1110         } else { // audio track
1111             unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;
1112             audio_frame_size += klv_fill_size(audio_frame_size);
1113             put_byte(pb, 1);
1114             put_be32(pb, (i-1)*audio_frame_size); // element delta
1115         }
1116     }
1117
1118     mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);
1119     put_be32(pb, mxf->edit_units_count);  // num of entries
1120     put_be32(pb, 11+mxf->slice_count*4);  // size of one entry
1121     for (i = 0; i < mxf->edit_units_count; i++) {
1122         if (temporal_reordering) {
1123             int temporal_offset = 0;
1124             for (j = i+1; j < mxf->edit_units_count; j++) {
1125                 temporal_offset++;
1126                 if (mxf->index_entries[j].flags & 0x10) { // backward prediction
1127                     // next is not b, so is reordered
1128                     if (!(mxf->index_entries[i+1].flags & 0x10)) {
1129                         if ((mxf->index_entries[i].flags & 0x11) == 0) // i frame
1130                             temporal_offset = 0;
1131                         else
1132                             temporal_offset = -temporal_offset;
1133                     }
1134                     break;
1135                 }
1136             }
1137             put_byte(pb, temporal_offset);
1138         } else
1139             put_byte(pb, 0);
1140         if (!(mxf->index_entries[i].flags & 0x33)) { // I frame
1141             mxf->last_key_index = key_index;
1142             key_index = i;
1143         }
1144         if (mxf->index_entries[i].flags & 0x10 && // backward prediction
1145             !(mxf->index_entries[key_index].flags & 0x80)) { // open gop
1146             put_byte(pb, mxf->last_key_index - i);
1147         } else {
1148             put_byte(pb, key_index - i); // key frame offset
1149             if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward
1150                 mxf->last_key_index = key_index;
1151         }
1152         put_byte(pb, mxf->index_entries[i].flags);
1153         // stream offset
1154         put_be64(pb, mxf->index_entries[i].offset - mxf->first_edit_unit_offset);
1155         if (s->nb_streams > 1)
1156             put_be32(pb, mxf->index_entries[i].slice_offset);
1157     }
1158
1159     mxf->last_key_index = key_index - mxf->edit_units_count;
1160     mxf->last_indexed_edit_unit += mxf->edit_units_count;
1161     mxf->edit_units_count = 0;
1162     }
1163 }
1164
1165 static void mxf_write_klv_fill(AVFormatContext *s)
1166 {
1167     unsigned pad = klv_fill_size(url_ftell(s->pb));
1168     if (pad) {
1169         put_buffer(s->pb, klv_fill_key, 16);
1170         pad -= 16 + 4;
1171         klv_encode_ber4_length(s->pb, pad);
1172         for (; pad; pad--)
1173             put_byte(s->pb, 0);
1174         assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));
1175     }
1176 }
1177
1178 static void mxf_write_partition(AVFormatContext *s, int bodysid,
1179                                 int indexsid,
1180                                 const uint8_t *key, int write_metadata)
1181 {
1182     MXFContext *mxf = s->priv_data;
1183     ByteIOContext *pb = s->pb;
1184     int64_t header_byte_count_offset;
1185     unsigned index_byte_count = 0;
1186     uint64_t partition_offset = url_ftell(pb);
1187
1188     if (!mxf->edit_unit_byte_count && mxf->edit_units_count)
1189         index_byte_count = 85 + 12+(s->nb_streams+1)*6 +
1190             12+mxf->edit_units_count*(11+mxf->slice_count*4);
1191     else if (mxf->edit_unit_byte_count && indexsid)
1192         index_byte_count = 85;
1193
1194     if (index_byte_count) {
1195         // add encoded ber length
1196         index_byte_count += 16 + klv_ber_length(index_byte_count);
1197         index_byte_count += klv_fill_size(index_byte_count);
1198     }
1199
1200     if (!memcmp(key, body_partition_key, 16)) {
1201         mxf->body_partition_offset =
1202             av_realloc(mxf->body_partition_offset,
1203                        (mxf->body_partitions_count+1)*
1204                        sizeof(*mxf->body_partition_offset));
1205         mxf->body_partition_offset[mxf->body_partitions_count++] = partition_offset;
1206     }
1207
1208     // write klv
1209     put_buffer(pb, key, 16);
1210
1211     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);
1212
1213     // write partition value
1214     put_be16(pb, 1); // majorVersion
1215     put_be16(pb, 2); // minorVersion
1216     put_be32(pb, KAG_SIZE); // KAGSize
1217
1218     put_be64(pb, partition_offset); // ThisPartition
1219
1220     if (!memcmp(key, body_partition_key, 16) && mxf->body_partitions_count > 1)
1221         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-2]); // PreviousPartition
1222     else if (!memcmp(key, footer_partition_key, 16) && mxf->body_partitions_count)
1223         put_be64(pb, mxf->body_partition_offset[mxf->body_partitions_count-1]); // PreviousPartition
1224     else
1225         put_be64(pb, 0);
1226
1227     put_be64(pb, mxf->footer_partition_offset); // footerPartition
1228
1229     // set offset
1230     header_byte_count_offset = url_ftell(pb);
1231     put_be64(pb, 0); // headerByteCount, update later
1232
1233     // indexTable
1234     put_be64(pb, index_byte_count); // indexByteCount
1235     put_be32(pb, index_byte_count ? indexsid : 0); // indexSID
1236
1237     // BodyOffset
1238     if (bodysid && mxf->edit_units_count && mxf->body_partitions_count) {
1239         uint64_t partition_end = url_ftell(pb) + 8 + 4 + 16 + 8 +
1240             16*mxf->essence_container_count;
1241         put_be64(pb, partition_end + klv_fill_size(partition_end) +
1242                  index_byte_count - mxf->first_edit_unit_offset);
1243     } else
1244         put_be64(pb, 0);
1245
1246     put_be32(pb, bodysid); // bodySID
1247
1248     // operational pattern
1249     if (s->nb_streams > 1) {
1250         put_buffer(pb, op1a_ul, 14);
1251         put_be16(pb, 0x0900); // multi track
1252     } else {
1253         put_buffer(pb, op1a_ul, 16);
1254     }
1255
1256     // essence container
1257     mxf_write_essence_container_refs(s);
1258
1259     if (write_metadata) {
1260         // mark the start of the headermetadata and calculate metadata size
1261         int64_t pos, start;
1262         unsigned header_byte_count;
1263
1264         mxf_write_klv_fill(s);
1265         start = url_ftell(s->pb);
1266         mxf_write_primer_pack(s);
1267         mxf_write_header_metadata_sets(s);
1268         pos = url_ftell(s->pb);
1269         header_byte_count = pos - start + klv_fill_size(pos);
1270
1271         // update header_byte_count
1272         url_fseek(pb, header_byte_count_offset, SEEK_SET);
1273         put_be64(pb, header_byte_count);
1274         url_fseek(pb, pos, SEEK_SET);
1275     }
1276
1277     put_flush_packet(pb);
1278 }
1279
1280 static const UID mxf_mpeg2_codec_uls[] = {
1281     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame
1282     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP
1283     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame
1284     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP
1285     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame
1286     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP
1287     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame
1288     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP
1289 };
1290
1291 static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)
1292 {
1293     if (avctx->profile == 4) { // Main
1294         if (avctx->level == 8) // Main
1295             return avctx->gop_size ?
1296                 &mxf_mpeg2_codec_uls[1] :
1297                 &mxf_mpeg2_codec_uls[0];
1298         else if (avctx->level == 4) // High
1299             return avctx->gop_size ?
1300                 &mxf_mpeg2_codec_uls[5] :
1301                 &mxf_mpeg2_codec_uls[4];
1302     } else if (avctx->profile == 0) { // 422
1303         if (avctx->level == 5) // Main
1304             return avctx->gop_size ?
1305                 &mxf_mpeg2_codec_uls[3] :
1306                 &mxf_mpeg2_codec_uls[2];
1307         else if (avctx->level == 2) // High
1308             return avctx->gop_size ?
1309                 &mxf_mpeg2_codec_uls[7] :
1310                 &mxf_mpeg2_codec_uls[6];
1311     }
1312     return NULL;
1313 }
1314
1315 static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt, int *flags)
1316 {
1317     MXFStreamContext *sc = st->priv_data;
1318     MXFContext *mxf = s->priv_data;
1319     uint32_t c = -1;
1320     int i;
1321
1322     *flags = 0;
1323
1324     for(i = 0; i < pkt->size - 4; i++) {
1325         c = (c<<8) + pkt->data[i];
1326         if (c == 0x1B5) {
1327             if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
1328                 st->codec->profile = pkt->data[i+1] & 0x07;
1329                 st->codec->level   = pkt->data[i+2] >> 4;
1330             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext
1331                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame
1332                 break;
1333             }
1334         } else if (c == 0x1b8) { // gop
1335             if (i + 4 < pkt->size) {
1336                 if (pkt->data[i+4]>>6 & 0x01) // closed
1337                     *flags |= 0x80; // random access
1338                 if (!mxf->header_written) {
1339                     unsigned hours   =  (pkt->data[i+1]>>2) & 0x1f;
1340                     unsigned minutes = ((pkt->data[i+1] & 0x03) << 4) | (pkt->data[i+2]>>4);
1341                     unsigned seconds = ((pkt->data[i+2] & 0x07) << 3) | (pkt->data[i+3]>>5);
1342                     unsigned frames  = ((pkt->data[i+3] & 0x1f) << 1) | (pkt->data[i+4]>>7);
1343                     mxf->timecode_drop_frame = !!(pkt->data[i+1] & 0x80);
1344                     mxf->timecode_start = (hours*3600 + minutes*60 + seconds) *
1345                         mxf->timecode_base + frames;
1346                     if (mxf->timecode_drop_frame) {
1347                         unsigned tminutes = 60 * hours + minutes;
1348                         mxf->timecode_start -= 2 * (tminutes - tminutes / 10);
1349                     }
1350                     av_log(s, AV_LOG_DEBUG, "frame %d %d:%d:%d%c%d\n", mxf->timecode_start,
1351                            hours, minutes, seconds, mxf->timecode_drop_frame ? ';':':', frames);
1352                 }
1353             }
1354         } else if (c == 0x1b3) { // seq
1355             *flags |= 0x40;
1356         } else if (c == 0x100) { // pic
1357             int pict_type = (pkt->data[i+2]>>3) & 0x07;
1358             if (pict_type == 2) { // P frame
1359                 *flags |= 0x22;
1360                 st->codec->gop_size = 1;
1361             } else if (pict_type == 3) { // B frame
1362                 *flags |= 0x33;
1363                 sc->temporal_reordering = -1;
1364             } else if (!pict_type) {
1365                 av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");
1366                 return 0;
1367             }
1368         }
1369     }
1370     if (s->oformat != &mxf_d10_muxer)
1371         sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);
1372     return !!sc->codec_ul;
1373 }
1374
1375 static uint64_t mxf_parse_timestamp(time_t timestamp)
1376 {
1377     struct tm *time = localtime(&timestamp);
1378     return (uint64_t)(time->tm_year+1900) << 48 |
1379            (uint64_t)(time->tm_mon+1)     << 40 |
1380            (uint64_t) time->tm_mday       << 32 |
1381                       time->tm_hour       << 24 |
1382                       time->tm_min        << 16 |
1383                       time->tm_sec        << 8;
1384 }
1385
1386 static int mxf_write_header(AVFormatContext *s)
1387 {
1388     MXFContext *mxf = s->priv_data;
1389     int i;
1390     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};
1391     const int *samples_per_frame = NULL;
1392
1393     for (i = 0; i < s->nb_streams; i++) {
1394         AVStream *st = s->streams[i];
1395         MXFStreamContext *sc = av_mallocz(sizeof(*sc));
1396         if (!sc)
1397             return AVERROR(ENOMEM);
1398         st->priv_data = sc;
1399
1400         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
1401             if (i != 0) {
1402                 av_log(s, AV_LOG_ERROR, "video stream must be first track\n");
1403                 return -1;
1404             }
1405             if (fabs(av_q2d(st->codec->time_base) - 1/25.0) < 0.0001) {
1406                 samples_per_frame = PAL_samples_per_frame;
1407                 mxf->time_base = (AVRational){ 1, 25 };
1408                 mxf->timecode_base = 25;
1409             } else if (fabs(av_q2d(st->codec->time_base) - 1001/30000.0) < 0.0001) {
1410                 samples_per_frame = NTSC_samples_per_frame;
1411                 mxf->time_base = (AVRational){ 1001, 30000 };
1412                 mxf->timecode_base = 30;
1413             } else {
1414                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");
1415                 return -1;
1416             }
1417             av_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);
1418             if (s->oformat == &mxf_d10_muxer) {
1419                 if (st->codec->bit_rate == 50000000)
1420                     if (mxf->time_base.den == 25) sc->index = 3;
1421                     else                          sc->index = 5;
1422                 else if (st->codec->bit_rate == 40000000)
1423                     if (mxf->time_base.den == 25) sc->index = 7;
1424                     else                          sc->index = 9;
1425                 else if (st->codec->bit_rate == 30000000)
1426                     if (mxf->time_base.den == 25) sc->index = 11;
1427                     else                          sc->index = 13;
1428                 else {
1429                     av_log(s, AV_LOG_ERROR, "error MXF D-10 only support 30/40/50 mbit/s\n");
1430                     return -1;
1431                 }
1432
1433                 mxf->edit_unit_byte_count = KAG_SIZE; // system element
1434                 mxf->edit_unit_byte_count += 16 + 4 + (uint64_t)st->codec->bit_rate *
1435                     mxf->time_base.num / (8*mxf->time_base.den);
1436                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);
1437                 mxf->edit_unit_byte_count += 16 + 4 + 4 + samples_per_frame[0]*8*4;
1438                 mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);
1439             }
1440         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1441             if (st->codec->sample_rate != 48000) {
1442                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");
1443                 return -1;
1444             }
1445             av_set_pts_info(st, 64, 1, st->codec->sample_rate);
1446             if (s->oformat == &mxf_d10_muxer) {
1447                 if (st->index != 1) {
1448                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support one audio track\n");
1449                     return -1;
1450                 }
1451                 if (st->codec->codec_id != CODEC_ID_PCM_S16LE &&
1452                     st->codec->codec_id != CODEC_ID_PCM_S24LE) {
1453                     av_log(s, AV_LOG_ERROR, "MXF D-10 only support 16 or 24 bits le audio\n");
1454                 }
1455                 sc->index = ((MXFStreamContext*)s->streams[0]->priv_data)->index + 1;
1456             } else
1457             mxf->slice_count = 1;
1458         }
1459
1460         if (!sc->index) {
1461         sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);
1462         if (sc->index == -1) {
1463             av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "
1464                    "codec not currently supported in container\n", i);
1465             return -1;
1466         }
1467         }
1468
1469         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;
1470
1471         if (!present[sc->index]) {
1472             mxf->essence_containers_indices[mxf->essence_container_count++] = sc->index;
1473             present[sc->index] = 1;
1474         } else
1475             present[sc->index]++;
1476         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);
1477         sc->track_essence_element_key[15] = present[sc->index];
1478         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);
1479     }
1480
1481     if (s->oformat == &mxf_d10_muxer) {
1482         mxf->essence_container_count = 1;
1483     }
1484
1485     for (i = 0; i < s->nb_streams; i++) {
1486         MXFStreamContext *sc = s->streams[i]->priv_data;
1487         // update element count
1488         sc->track_essence_element_key[13] = present[sc->index];
1489         sc->order = AV_RB32(sc->track_essence_element_key+12);
1490     }
1491
1492     mxf->timestamp = mxf_parse_timestamp(s->timestamp);
1493     mxf->duration = -1;
1494
1495     mxf->timecode_track = av_mallocz(sizeof(*mxf->timecode_track));
1496     if (!mxf->timecode_track)
1497         return AVERROR(ENOMEM);
1498     mxf->timecode_track->priv_data = av_mallocz(sizeof(MXFStreamContext));
1499     if (!mxf->timecode_track->priv_data)
1500         return AVERROR(ENOMEM);
1501     mxf->timecode_track->index = s->nb_streams;
1502
1503     if (!samples_per_frame)
1504         samples_per_frame = PAL_samples_per_frame;
1505
1506     if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)
1507         return -1;
1508
1509     return 0;
1510 }
1511
1512 static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };
1513 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 };
1514
1515 static uint32_t ff_framenum_to_12m_time_code(unsigned frame, int drop, int fps)
1516 {
1517     return (0                                    << 31) | // color frame flag
1518            (0                                    << 30) | // drop  frame flag
1519            ( ((frame % fps) / 10)                << 28) | // tens  of frames
1520            ( ((frame % fps) % 10)                << 24) | // units of frames
1521            (0                                    << 23) | // field phase (NTSC), b0 (PAL)
1522            ((((frame / fps) % 60) / 10)          << 20) | // tens  of seconds
1523            ((((frame / fps) % 60) % 10)          << 16) | // units of seconds
1524            (0                                    << 15) | // b0 (NTSC), b2 (PAL)
1525            ((((frame / (fps * 60)) % 60) / 10)   << 12) | // tens  of minutes
1526            ((((frame / (fps * 60)) % 60) % 10)   <<  8) | // units of minutes
1527            (0                                    <<  7) | // b1
1528            (0                                    <<  6) | // b2 (NSC), field phase (PAL)
1529            ((((frame / (fps * 3600) % 24)) / 10) <<  4) | // tens  of hours
1530            (  (frame / (fps * 3600) % 24)) % 10;          // units of hours
1531 }
1532
1533 static void mxf_write_system_item(AVFormatContext *s)
1534 {
1535     MXFContext *mxf = s->priv_data;
1536     ByteIOContext *pb = s->pb;
1537     unsigned frame;
1538     uint32_t time_code;
1539
1540     frame = mxf->timecode_start + mxf->last_indexed_edit_unit + mxf->edit_units_count;
1541
1542     // write system metadata pack
1543     put_buffer(pb, system_metadata_pack_key, 16);
1544     klv_encode_ber4_length(pb, 57);
1545     put_byte(pb, 0x5c); // UL, user date/time stamp, picture and sound item present
1546     put_byte(pb, 0x04); // content package rate
1547     put_byte(pb, 0x00); // content package type
1548     put_be16(pb, 0x00); // channel handle
1549     put_be16(pb, frame); // continuity count
1550     if (mxf->essence_container_count > 1)
1551         put_buffer(pb, multiple_desc_ul, 16);
1552     else
1553         put_buffer(pb, mxf_essence_container_uls[mxf->essence_containers_indices[0]].container_ul, 16);
1554     put_byte(pb, 0);
1555     put_be64(pb, 0);
1556     put_be64(pb, 0); // creation date/time stamp
1557
1558     put_byte(pb, 0x81); // SMPTE 12M time code
1559     time_code = ff_framenum_to_12m_time_code(frame, mxf->timecode_drop_frame, mxf->timecode_base);
1560     put_be32(pb, time_code);
1561     put_be32(pb, 0); // binary group data
1562     put_be64(pb, 0);
1563
1564     // write system metadata package set
1565     put_buffer(pb, system_metadata_package_set_key, 16);
1566     klv_encode_ber4_length(pb, 35);
1567     put_byte(pb, 0x83); // UMID
1568     put_be16(pb, 0x20);
1569     mxf_write_umid(pb, SourcePackage, 0);
1570 }
1571
1572 static void mxf_write_d10_video_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
1573 {
1574     MXFContext *mxf = s->priv_data;
1575     ByteIOContext *pb = s->pb;
1576     int packet_size = (uint64_t)st->codec->bit_rate*mxf->time_base.num /
1577         (8*mxf->time_base.den); // frame size
1578     int pad;
1579
1580     packet_size += 16 + 4;
1581     packet_size += klv_fill_size(packet_size);
1582
1583     klv_encode_ber4_length(pb, pkt->size);
1584     put_buffer(pb, pkt->data, pkt->size);
1585
1586     // ensure CBR muxing by padding to correct video frame size
1587     pad = packet_size - pkt->size - 16 - 4;
1588     if (pad > 20) {
1589         put_buffer(s->pb, klv_fill_key, 16);
1590         pad -= 16 + 4;
1591         klv_encode_ber4_length(s->pb, pad);
1592         for (; pad; pad--)
1593             put_byte(s->pb, 0);
1594         assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));
1595     } else {
1596         av_log(s, AV_LOG_WARNING, "cannot fill d-10 video packet\n");
1597         for (; pad > 0; pad--)
1598             put_byte(s->pb, 0);
1599     }
1600 }
1601
1602 static void mxf_write_d10_audio_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
1603 {
1604     MXFContext *mxf = s->priv_data;
1605     ByteIOContext *pb = s->pb;
1606     int frame_size = (pkt->size<<3) /
1607         (st->codec->channels*av_get_bits_per_sample(st->codec->codec_id));
1608     uint8_t *samples = pkt->data;
1609     uint8_t *end = pkt->data + pkt->size;
1610     int i;
1611
1612     klv_encode_ber4_length(pb, 4 + frame_size*4*8);
1613
1614     put_byte(pb, (frame_size == 1920 ? 0 : (mxf->edit_units_count-1) % 5 + 1));
1615     put_le16(pb, frame_size);
1616     put_byte(pb, (1<<st->codec->channels)-1);
1617
1618     while (samples < end) {
1619         for (i = 0; i < st->codec->channels; i++) {
1620             uint32_t sample;
1621             if (st->codec->codec_id == CODEC_ID_PCM_S24LE) {
1622                 sample = (AV_RL24(samples)<< 4)|((samples==pkt->data)<<3) | i;
1623                 samples += 3;
1624             } else {
1625                 sample = (AV_RL16(samples)<<12)|((samples==pkt->data)<<3) | i;
1626                 samples += 2;
1627             }
1628             put_le32(pb, sample);
1629         }
1630         for (; i < 8; i++)
1631             put_le32(pb, 0);
1632     }
1633 }
1634
1635 static int mxf_write_d10_packet(AVFormatContext *s, AVPacket *pkt)
1636 {
1637     MXFContext *mxf = s->priv_data;
1638     ByteIOContext *pb = s->pb;
1639     AVStream *st = s->streams[pkt->stream_index];
1640     MXFStreamContext *sc = st->priv_data;
1641     int flags = 0;
1642
1643     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
1644         if (!mxf_parse_mpeg2_frame(s, st, pkt, &flags)) {
1645             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
1646             return -1;
1647         }
1648     }
1649
1650     if (!mxf->header_written) {
1651         mxf_write_partition(s, 1, 2, header_open_partition_key, 1);
1652         mxf->header_written = 1;
1653         mxf_write_klv_fill(s);
1654         mxf_write_index_table_segment(s);
1655     }
1656
1657     if (st->index == 0) {
1658         mxf_write_klv_fill(s);
1659         mxf_write_system_item(s);
1660
1661         mxf->edit_units_count++;
1662     }
1663
1664     mxf_write_klv_fill(s);
1665     put_buffer(pb, sc->track_essence_element_key, 16); // write key
1666     if (st->codec->codec_type == CODEC_TYPE_VIDEO)
1667         mxf_write_d10_video_packet(s, st, pkt);
1668     else
1669         mxf_write_d10_audio_packet(s, st, pkt);
1670
1671     put_flush_packet(pb);
1672
1673     return 0;
1674 }
1675
1676 static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
1677 {
1678     MXFContext *mxf = s->priv_data;
1679     ByteIOContext *pb = s->pb;
1680     AVStream *st = s->streams[pkt->stream_index];
1681     MXFStreamContext *sc = st->priv_data;
1682     int flags = 0;
1683
1684     if (!(mxf->edit_units_count % EDIT_UNITS_PER_BODY)) {
1685         mxf->index_entries = av_realloc(mxf->index_entries,
1686             (mxf->edit_units_count + EDIT_UNITS_PER_BODY)*sizeof(*mxf->index_entries));
1687         if (!mxf->index_entries) {
1688             av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");
1689             return -1;
1690         }
1691     }
1692
1693     if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
1694         if (!mxf_parse_mpeg2_frame(s, st, pkt, &flags)) {
1695             av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
1696             return -1;
1697         }
1698     }
1699
1700     if (!mxf->header_written) {
1701         mxf_write_partition(s, 0, 0, header_open_partition_key, 1);
1702         mxf->header_written = 1;
1703     }
1704
1705     if (st->index == 0) {
1706         if ((!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&
1707             !(flags & 0x33)) { // I frame, Gop start
1708             mxf_write_klv_fill(s);
1709             mxf_write_partition(s, 1, 2, body_partition_key, 0);
1710
1711             mxf_write_klv_fill(s);
1712             mxf_write_index_table_segment(s);
1713         }
1714
1715         mxf_write_klv_fill(s);
1716         mxf->index_entries[mxf->edit_units_count].offset = url_ftell(pb);
1717         mxf->index_entries[mxf->edit_units_count].flags = flags;
1718         if (!mxf->first_edit_unit_offset)
1719             mxf->first_edit_unit_offset = mxf->index_entries[0].offset;
1720         mxf_write_system_item(s);
1721
1722         mxf->edit_units_count++;
1723     } else if (st->index == 1) {
1724         mxf->index_entries[mxf->edit_units_count-1].slice_offset =
1725             url_ftell(pb) - mxf->index_entries[mxf->edit_units_count-1].offset;
1726     }
1727
1728     mxf_write_klv_fill(s);
1729     put_buffer(pb, sc->track_essence_element_key, 16); // write key
1730     klv_encode_ber4_length(pb, pkt->size); // write length
1731     put_buffer(pb, pkt->data, pkt->size); // write value
1732
1733     put_flush_packet(pb);
1734     return 0;
1735 }
1736
1737 static void mxf_write_random_index_pack(AVFormatContext *s)
1738 {
1739     MXFContext *mxf = s->priv_data;
1740     ByteIOContext *pb = s->pb;
1741     uint64_t pos = url_ftell(pb);
1742     int i;
1743
1744     put_buffer(pb, random_index_pack_key, 16);
1745     klv_encode_ber_length(pb, 28 + 12*mxf->body_partitions_count);
1746
1747     put_be32(pb, 0); // BodySID of header partition
1748     put_be64(pb, 0); // offset of header partition
1749
1750     for (i = 0; i < mxf->body_partitions_count; i++) {
1751         put_be32(pb, 1); // BodySID
1752         put_be64(pb, mxf->body_partition_offset[i]);
1753     }
1754
1755     put_be32(pb, 0); // BodySID of footer partition
1756     put_be64(pb, mxf->footer_partition_offset);
1757
1758     put_be32(pb, url_ftell(pb) - pos + 4);
1759 }
1760
1761 static int mxf_write_footer(AVFormatContext *s)
1762 {
1763     MXFContext *mxf = s->priv_data;
1764     ByteIOContext *pb = s->pb;
1765
1766     mxf->duration = mxf->last_indexed_edit_unit + mxf->edit_units_count;
1767
1768     mxf_write_klv_fill(s);
1769     mxf->footer_partition_offset = url_ftell(pb);
1770     if (mxf->edit_unit_byte_count) { // no need to repeat index
1771         mxf_write_partition(s, 0, 0, footer_partition_key, 0);
1772     } else {
1773     mxf_write_partition(s, 0, 2, footer_partition_key, 0);
1774
1775     mxf_write_klv_fill(s);
1776     mxf_write_index_table_segment(s);
1777     }
1778
1779     mxf_write_klv_fill(s);
1780     mxf_write_random_index_pack(s);
1781
1782     if (!url_is_streamed(s->pb)) {
1783         int index;
1784         url_fseek(pb, 0, SEEK_SET);
1785         if (s->oformat == &mxf_d10_muxer) {
1786             mxf_write_partition(s, 1, 2, header_closed_partition_key, 1);
1787             index = 1;
1788         } else if (mxf->edit_unit_byte_count) {
1789             mxf_write_partition(s, 0, 2, header_closed_partition_key, 1);
1790             index = 1;
1791         } else {
1792             mxf_write_partition(s, 0, 0, header_closed_partition_key, 1);
1793             index = 0;
1794         }
1795         if (index) {
1796             mxf_write_klv_fill(s);
1797             mxf_write_index_table_segment(s);
1798         }
1799     }
1800
1801     ff_audio_interleave_close(s);
1802
1803     av_freep(&mxf->index_entries);
1804     av_freep(&mxf->body_partition_offset);
1805     av_freep(&mxf->timecode_track->priv_data);
1806     av_freep(&mxf->timecode_track);
1807
1808     mxf_free(s);
1809     return 0;
1810 }
1811
1812 static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1813 {
1814     AVPacketList *pktl;
1815     int stream_count = 0;
1816     int streams[MAX_STREAMS];
1817
1818     memset(streams, 0, sizeof(streams));
1819     pktl = s->packet_buffer;
1820     while (pktl) {
1821         //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);
1822         if (!streams[pktl->pkt.stream_index])
1823             stream_count++;
1824         streams[pktl->pkt.stream_index]++;
1825         pktl = pktl->next;
1826     }
1827
1828     if (stream_count && (s->nb_streams == stream_count || flush)) {
1829         pktl = s->packet_buffer;
1830         if (s->nb_streams != stream_count) {
1831             AVPacketList *first = NULL;
1832             AVPacketList *last = NULL;
1833             // find first packet in edit unit
1834             while (pktl) {
1835                 AVStream *st = s->streams[pktl->pkt.stream_index];
1836                 if (st->index == 0)
1837                     break;
1838                 else if (!first)
1839                     first = pktl;
1840                 last = pktl;
1841                 pktl = pktl->next;
1842             }
1843             if (last)
1844                 last->next = NULL;
1845             // purge packet queue
1846             while (pktl) {
1847                 AVPacketList *next = pktl->next;
1848                 av_free_packet(&pktl->pkt);
1849                 av_freep(&pktl);
1850                 pktl = next;
1851             }
1852             if (!first)
1853                 goto out;
1854             pktl = first;
1855         }
1856
1857         *out = pktl->pkt;
1858         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);
1859         s->packet_buffer = pktl->next;
1860         av_freep(&pktl);
1861         return 1;
1862     } else {
1863     out:
1864         av_init_packet(out);
1865         return 0;
1866     }
1867 }
1868
1869 static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
1870 {
1871     MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;
1872     MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;
1873
1874     return next->dts > pkt->dts ||
1875         (next->dts == pkt->dts && sc->order < sc2->order);
1876 }
1877
1878 static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1879 {
1880     return ff_audio_rechunk_interleave(s, out, pkt, flush,
1881                                mxf_interleave_get_packet, mxf_compare_timestamps);
1882 }
1883
1884 AVOutputFormat mxf_muxer = {
1885     "mxf",
1886     NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1887     NULL,
1888     "mxf",
1889     sizeof(MXFContext),
1890     CODEC_ID_PCM_S16LE,
1891     CODEC_ID_MPEG2VIDEO,
1892     mxf_write_header,
1893     mxf_write_packet,
1894     mxf_write_footer,
1895     AVFMT_NOTIMESTAMPS,
1896     NULL,
1897     mxf_interleave,
1898 };
1899
1900 AVOutputFormat mxf_d10_muxer = {
1901     "mxf_d10",
1902     NULL_IF_CONFIG_SMALL("Material eXchange Format, D-10 Mapping"),
1903     "application/mxf",
1904     NULL,
1905     sizeof(MXFContext),
1906     CODEC_ID_PCM_S16LE,
1907     CODEC_ID_MPEG2VIDEO,
1908     mxf_write_header,
1909     mxf_write_d10_packet,
1910     mxf_write_footer,
1911     AVFMT_NOTIMESTAMPS,
1912     NULL,
1913     mxf_interleave,
1914 };