49bbd33c83bdde7d360aeb98cde47f4ecc8b3b68
[ffmpeg.git] / libavformat / mxfenc.c
1 /*
2  * MXF muxer
3  * Copyright (c) 2008 GUCAS, Zhentan Feng <spyfeng at gmail dot com>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21
22 /*
23  * References
24  * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
25  * SMPTE 377M MXF File Format Specifications
26  * SMPTE 379M MXF Generic Container
27  * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
28  * SMPTE RP210: SMPTE Metadata Dictionary
29  * SMPTE RP224: Registry of SMPTE Universal Labels
30  */
31
32 //#define DEBUG
33
34 #include "libavutil/fifo.h"
35 #include "mxf.h"
36
37 static const int NTSC_samples_per_frame[] = { 1602, 1601, 1602, 1601, 1602, 0 };
38 static const int PAL_samples_per_frame[]  = { 1920, 0 };
39
40 typedef struct {
41     AVFifoBuffer fifo;
42     unsigned fifo_size; ///< current fifo size allocated
43     uint64_t dts; ///< current dts
44     int sample_size; ///< size of one sample all channels included
45     const int *samples_per_frame; ///< must be 0 terminated
46     const int *samples; ///< current samples per frame, pointer to samples_per_frame
47 } AudioInterleaveContext;
48
49 typedef struct {
50     int local_tag;
51     UID uid;
52 } MXFLocalTagPair;
53
54 typedef struct {
55     AudioInterleaveContext aic;
56     UID track_essence_element_key;
57     int index; //<<< index in mxf_essence_container_uls table
58     const UID *codec_ul;
59     int64_t duration;
60     int order; ///< interleaving order if dts are equal
61     int interlaced; ///< wether picture is interlaced
62 } MXFStreamContext;
63
64 typedef struct {
65     UID container_ul;
66     UID element_ul;
67     UID codec_ul;
68     enum CodecID id;
69     void (*write_desc)();
70 } MXFContainerEssenceEntry;
71
72 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st);
73 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st);
74 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st);
75
76 static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {
77     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },
78       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },
79       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },
80       CODEC_ID_MPEG2VIDEO, mxf_write_mpegvideo_desc },
81     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },
82       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },
83       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
84       CODEC_ID_PCM_S16LE, mxf_write_aes3_desc },
85     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },
86       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },
87       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
88       CODEC_ID_PCM_S16LE, mxf_write_wav_desc },
89     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
90       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
91       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
92       CODEC_ID_NONE, NULL },
93 };
94
95 typedef struct MXFContext {
96     int64_t footer_partition_offset;
97     int essence_container_count;
98     uint8_t essence_containers_indices[FF_ARRAY_ELEMS(mxf_essence_container_uls)];
99     AVRational time_base;
100     int header_written;
101 } MXFContext;
102
103 static const uint8_t uuid_base[]            = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };
104 static const uint8_t umid_base[]            = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x01,0x0D,0x00,0x13,0x00,0x00,0x00 };
105
106 /**
107  * complete key for operation pattern, partitions, and primer pack
108  */
109 static const uint8_t op1a_ul[]              = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x01,0x00 };
110 static const uint8_t footer_partition_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }; // ClosedComplete
111 static const uint8_t primer_pack_key[]      = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x05,0x01,0x00 };
112
113
114 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
115 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
116
117 /**
118  * partial key for header metadata
119  */
120 static const uint8_t header_metadata_key[]  = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01 };
121
122 static const uint8_t multiple_desc_ul[] = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x0D,0x01,0x03,0x01,0x02,0x7F,0x01,0x00 };
123
124 /**
125  * SMPTE RP210 http://www.smpte-ra.org/mdd/index.html
126  */
127 static const MXFLocalTagPair mxf_local_tag_batch[] = {
128     // preface set
129     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */
130     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */
131     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */
132     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */
133     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */
134     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */
135     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */
136     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */
137     // Identification
138     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */
139     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */
140     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */
141     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */
142     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */
143     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */
144     // Content Storage
145     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */
146     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */
147     // Essence Container Data
148     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */
149     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */
150     // Package
151     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */
152     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */
153     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */
154     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */
155     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */
156     // Track
157     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */
158     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */
159     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */
160     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */
161     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */
162     // Sequence
163     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */
164     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */
165     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */
166     // Source Clip
167     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */
168     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */
169     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */
170     // File Descriptor
171     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */
172     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */
173     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */
174     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */
175     // Generic Picture Essence Descriptor
176     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */
177     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */
178     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */
179     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */
180     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */
181     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */
182     // Generic Sound Essence Descriptor
183     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */
184     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */
185     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */
186     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */
187     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */
188 };
189
190 static void mxf_write_uuid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
191 {
192     put_buffer(pb, uuid_base, 12);
193     put_be16(pb, type);
194     put_be16(pb, value);
195 }
196
197 static void mxf_write_umid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
198 {
199     put_buffer(pb, umid_base, 16);
200     mxf_write_uuid(pb, type, value);
201 }
202
203 static void mxf_write_refs_count(ByteIOContext *pb, int ref_count)
204 {
205     put_be32(pb, ref_count);
206     put_be32(pb, 16);
207 }
208
209 static int klv_encode_ber_length(ByteIOContext *pb, uint64_t len)
210 {
211     // Determine the best BER size
212     int size;
213     if (len < 128) {
214         //short form
215         put_byte(pb, len);
216         return 1;
217     }
218
219     size = (av_log2(len) >> 3) + 1;
220
221     // long form
222     put_byte(pb, 0x80 + size);
223     while(size) {
224         size --;
225         put_byte(pb, len >> 8 * size & 0xff);
226     }
227     return 0;
228 }
229
230 /*
231  * Get essence container ul index
232  */
233 static int mxf_get_essence_container_ul_index(enum CodecID id)
234 {
235     int i;
236     for (i = 0; i < FF_ARRAY_ELEMS(mxf_essence_container_uls); i++)
237         if (mxf_essence_container_uls[i].id == id)
238             return i;
239     return -1;
240 }
241
242 static void mxf_write_primer_pack(AVFormatContext *s)
243 {
244     ByteIOContext *pb = s->pb;
245     int local_tag_number, i = 0;
246
247     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);
248
249     put_buffer(pb, primer_pack_key, 16);
250     klv_encode_ber_length(pb, local_tag_number * 18 + 8);
251
252     put_be32(pb, local_tag_number); // local_tag num
253     put_be32(pb, 18); // item size, always 18 according to the specs
254
255     for (i = 0; i < local_tag_number; i++) {
256         put_be16(pb, mxf_local_tag_batch[i].local_tag);
257         put_buffer(pb, mxf_local_tag_batch[i].uid, 16);
258     }
259 }
260
261 static void mxf_write_local_tag(ByteIOContext *pb, int size, int tag)
262 {
263     put_be16(pb, tag);
264     put_be16(pb, size);
265 }
266
267 static void mxf_write_metadata_key(ByteIOContext *pb, unsigned int value)
268 {
269     put_buffer(pb, header_metadata_key, 13);
270     put_be24(pb, value);
271 }
272
273 static void mxf_free(AVFormatContext *s)
274 {
275     int i;
276
277     for (i = 0; i < s->nb_streams; i++) {
278         AVStream *st = s->streams[i];
279         av_freep(&st->priv_data);
280     }
281 }
282
283 static const MXFDataDefinitionUL *mxf_get_data_definition_ul(enum CodecType type)
284 {
285     const MXFDataDefinitionUL *uls = ff_mxf_data_definition_uls;
286     while (uls->type != CODEC_TYPE_DATA) {
287         if (type == uls->type)
288             break;
289         uls++;
290     }
291     return uls;
292 }
293
294 static void mxf_write_essence_container_refs(AVFormatContext *s)
295 {
296     MXFContext *c = s->priv_data;
297     ByteIOContext *pb = s->pb;
298     int i;
299
300     mxf_write_refs_count(pb, c->essence_container_count);
301     av_log(s,AV_LOG_DEBUG, "essence container count:%d\n", c->essence_container_count);
302     for (i = 0; i < c->essence_container_count; i++) {
303         put_buffer(pb, mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul, 16);
304         PRINT_KEY(s, "essence container ul:\n", mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul);
305     }
306 }
307
308 static void mxf_write_preface(AVFormatContext *s)
309 {
310     MXFContext *mxf = s->priv_data;
311     ByteIOContext *pb = s->pb;
312
313     mxf_write_metadata_key(pb, 0x012f00);
314     PRINT_KEY(s, "preface key", pb->buf_ptr - 16);
315     klv_encode_ber_length(pb, 130 + 16 * mxf->essence_container_count);
316
317     // write preface set uid
318     mxf_write_local_tag(pb, 16, 0x3C0A);
319     mxf_write_uuid(pb, Preface, 0);
320     PRINT_KEY(s, "preface uid", pb->buf_ptr - 16);
321
322     // write create date as unknown
323     mxf_write_local_tag(pb, 8, 0x3B02);
324     put_be64(pb, 0);
325
326     // write version
327     mxf_write_local_tag(pb, 2, 0x3B05);
328     put_be16(pb, 1);
329
330     // write identification_refs
331     mxf_write_local_tag(pb, 16 + 8, 0x3B06);
332     mxf_write_refs_count(pb, 1);
333     mxf_write_uuid(pb, Identification, 0);
334
335     // write content_storage_refs
336     mxf_write_local_tag(pb, 16, 0x3B03);
337     mxf_write_uuid(pb, ContentStorage, 0);
338
339     mxf_write_local_tag(pb, 16, 0x3B09);
340     put_buffer(pb, op1a_ul, 16);
341
342     // write essence_container_refs
343     mxf_write_local_tag(pb, 8 + 16 * mxf->essence_container_count, 0x3B0A);
344     mxf_write_essence_container_refs(s);
345
346     // write dm_scheme_refs
347     mxf_write_local_tag(pb, 8, 0x3B0B);
348     put_be64(pb, 0);
349 }
350
351 /*
352  * Write a local tag containing an ascii string as utf-16
353  */
354 static void mxf_write_local_tag_utf16(ByteIOContext *pb, int tag, const char *value)
355 {
356     int i, size = strlen(value);
357     mxf_write_local_tag(pb, size*2, tag);
358     for (i = 0; i < size; i++)
359         put_be16(pb, value[i]);
360 }
361
362 static void mxf_write_identification(AVFormatContext *s)
363 {
364     ByteIOContext *pb = s->pb;
365     const char *company = "FFmpeg";
366     const char *product = "OP1a Muxer";
367     const char *version;
368     int length;
369
370     mxf_write_metadata_key(pb, 0x013000);
371     PRINT_KEY(s, "identification key", pb->buf_ptr - 16);
372
373     version = s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT ?
374         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);
375     length = 84 + (strlen(company)+strlen(product)+strlen(version))*2; // utf-16
376     klv_encode_ber_length(pb, length);
377
378     // write uid
379     mxf_write_local_tag(pb, 16, 0x3C0A);
380     mxf_write_uuid(pb, Identification, 0);
381     PRINT_KEY(s, "identification uid", pb->buf_ptr - 16);
382
383     // write generation uid
384     mxf_write_local_tag(pb, 16, 0x3C09);
385     mxf_write_uuid(pb, Identification, 1);
386
387     mxf_write_local_tag_utf16(pb, 0x3C01, company); // Company Name
388     mxf_write_local_tag_utf16(pb, 0x3C02, product); // Product Name
389     mxf_write_local_tag_utf16(pb, 0x3C04, version); // Version String
390
391     // write product uid
392     mxf_write_local_tag(pb, 16, 0x3C05);
393     mxf_write_uuid(pb, Identification, 2);
394
395     // write modified date
396     mxf_write_local_tag(pb, 8, 0x3C06);
397     put_be64(pb, 0);
398 }
399
400 static void mxf_write_content_storage(AVFormatContext *s)
401 {
402     ByteIOContext *pb = s->pb;
403
404     mxf_write_metadata_key(pb, 0x011800);
405     PRINT_KEY(s, "content storage key", pb->buf_ptr - 16);
406     klv_encode_ber_length(pb, 92);
407
408     // write uid
409     mxf_write_local_tag(pb, 16, 0x3C0A);
410     mxf_write_uuid(pb, ContentStorage, 0);
411     PRINT_KEY(s, "content storage uid", pb->buf_ptr - 16);
412
413     // write package reference
414     mxf_write_local_tag(pb, 16 * 2 + 8, 0x1901);
415     mxf_write_refs_count(pb, 2);
416     mxf_write_uuid(pb, MaterialPackage, 0);
417     mxf_write_uuid(pb, SourcePackage, 0);
418
419     // write essence container data
420     mxf_write_local_tag(pb, 8 + 16, 0x1902);
421     mxf_write_refs_count(pb, 1);
422     mxf_write_uuid(pb, EssenceContainerData, 0);
423 }
424
425 static void mxf_write_track(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
426 {
427     ByteIOContext *pb = s->pb;
428     MXFStreamContext *sc = st->priv_data;
429
430     mxf_write_metadata_key(pb, 0x013b00);
431     PRINT_KEY(s, "track key", pb->buf_ptr - 16);
432     klv_encode_ber_length(pb, 80);
433
434     // write track uid
435     mxf_write_local_tag(pb, 16, 0x3C0A);
436     mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, st->index);
437     PRINT_KEY(s, "track uid", pb->buf_ptr - 16);
438
439     // write track id
440     mxf_write_local_tag(pb, 4, 0x4801);
441     put_be32(pb, st->index);
442
443     // write track number
444     mxf_write_local_tag(pb, 4, 0x4804);
445     if (type == MaterialPackage)
446         put_be32(pb, 0); // track number of material package is 0
447     else
448         put_buffer(pb, sc->track_essence_element_key + 12, 4);
449
450     mxf_write_local_tag(pb, 8, 0x4B01);
451     put_be32(pb, st->time_base.den);
452     put_be32(pb, st->time_base.num);
453
454     // write origin
455     mxf_write_local_tag(pb, 8, 0x4B02);
456     put_be64(pb, 0);
457
458     // write sequence refs
459     mxf_write_local_tag(pb, 16, 0x4803);
460     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
461 }
462
463 static void mxf_write_common_fields(ByteIOContext *pb, AVStream *st)
464 {
465     const MXFDataDefinitionUL *data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);
466     MXFStreamContext *sc = st->priv_data;
467
468     // find data define uls
469     mxf_write_local_tag(pb, 16, 0x0201);
470     put_buffer(pb, data_def_ul->uid, 16);
471
472     // write duration
473     mxf_write_local_tag(pb, 8, 0x0202);
474     put_be64(pb, sc->duration);
475 }
476
477 static void mxf_write_sequence(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
478 {
479     ByteIOContext *pb = s->pb;
480
481     mxf_write_metadata_key(pb, 0x010f00);
482     PRINT_KEY(s, "sequence key", pb->buf_ptr - 16);
483     klv_encode_ber_length(pb, 80);
484
485     mxf_write_local_tag(pb, 16, 0x3C0A);
486     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
487
488     PRINT_KEY(s, "sequence uid", pb->buf_ptr - 16);
489     mxf_write_common_fields(pb, st);
490
491     // write structural component
492     mxf_write_local_tag(pb, 16 + 8, 0x1001);
493     mxf_write_refs_count(pb, 1);
494     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
495 }
496
497 static void mxf_write_structural_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
498 {
499     ByteIOContext *pb = s->pb;
500     int i;
501
502     mxf_write_metadata_key(pb, 0x011100);
503     PRINT_KEY(s, "sturctural component key", pb->buf_ptr - 16);
504     klv_encode_ber_length(pb, 108);
505
506     // write uid
507     mxf_write_local_tag(pb, 16, 0x3C0A);
508     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
509
510     PRINT_KEY(s, "structural component uid", pb->buf_ptr - 16);
511     mxf_write_common_fields(pb, st);
512
513     // write start_position
514     mxf_write_local_tag(pb, 8, 0x1201);
515     put_be64(pb, 0);
516
517     // write source package uid, end of the reference
518     mxf_write_local_tag(pb, 32, 0x1101);
519     if (type == SourcePackage) {
520         for (i = 0; i < 4; i++)
521             put_be64(pb, 0);
522     } else
523         mxf_write_umid(pb, SourcePackage, 0);
524
525     // write source track id
526     mxf_write_local_tag(pb, 4, 0x1102);
527     if (type == SourcePackage)
528         put_be32(pb, 0);
529     else
530         put_be32(pb, st->index);
531 }
532
533 static void mxf_write_multi_descriptor(AVFormatContext *s)
534 {
535     ByteIOContext *pb = s->pb;
536     int i;
537
538     mxf_write_metadata_key(pb, 0x014400);
539     PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);
540     klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);
541
542     mxf_write_local_tag(pb, 16, 0x3C0A);
543     mxf_write_uuid(pb, MultipleDescriptor, 0);
544     PRINT_KEY(s, "multi_desc uid", pb->buf_ptr - 16);
545
546     // write sample rate
547     mxf_write_local_tag(pb, 8, 0x3001);
548     put_be32(pb, s->streams[0]->time_base.den);
549     put_be32(pb, s->streams[0]->time_base.num);
550
551     // write essence container ul
552     mxf_write_local_tag(pb, 16, 0x3004);
553     put_buffer(pb, multiple_desc_ul, 16);
554
555     // write sub descriptor refs
556     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x3F01);
557     mxf_write_refs_count(pb, s->nb_streams);
558     for (i = 0; i < s->nb_streams; i++)
559         mxf_write_uuid(pb, SubDescriptor, i);
560 }
561
562 static void mxf_write_generic_desc(ByteIOContext *pb, AVStream *st, const UID key, unsigned size)
563 {
564     MXFStreamContext *sc = st->priv_data;
565
566     put_buffer(pb, key, 16);
567     klv_encode_ber_length(pb, size);
568
569     mxf_write_local_tag(pb, 16, 0x3C0A);
570     mxf_write_uuid(pb, SubDescriptor, st->index);
571
572     mxf_write_local_tag(pb, 4, 0x3006);
573     put_be32(pb, st->index);
574
575     mxf_write_local_tag(pb, 8, 0x3001);
576     put_be32(pb, st->time_base.den);
577     put_be32(pb, st->time_base.num);
578
579     mxf_write_local_tag(pb, 16, 0x3004);
580     put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
581 }
582
583 static const UID mxf_mpegvideo_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 };
584 static const UID mxf_wav_descriptor_key       = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 };
585 static const UID mxf_aes3_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 };
586
587 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
588 {
589     MXFStreamContext *sc = st->priv_data;
590     ByteIOContext *pb = s->pb;
591     int stored_height = (st->codec->height+15)/16*16;
592     AVRational dar;
593     int f1, f2;
594
595     mxf_write_generic_desc(pb, st, mxf_mpegvideo_descriptor_key, 133);
596
597     mxf_write_local_tag(pb, 4, 0x3203);
598     put_be32(pb, st->codec->width);
599
600     mxf_write_local_tag(pb, 4, 0x3202);
601     put_be32(pb, stored_height>>sc->interlaced);
602
603     // frame layout
604     mxf_write_local_tag(pb, 1, 0x320C);
605     put_byte(pb, sc->interlaced);
606
607     // video line map
608     mxf_write_local_tag(pb, 16, 0x320D);
609     put_be32(pb, 2);
610     put_be32(pb, 4);
611     switch (st->codec->height) {
612     case  576: f1 = 23; f2 = 336; break;
613     case  608: f1 =  7; f2 = 320; break;
614     case  480: f1 = 20; f2 = 283; break;
615     case  512: f1 =  7; f2 = 270; break;
616     case  720: f1 = 26; f2 =   0; break; // progressive
617     case 1080: f1 = 21; f2 = 584; break;
618     default:   f1 =  0; f2 =   0; break;
619     }
620
621     if (!sc->interlaced) {
622         f2  = 0;
623         f1 *= 2;
624     }
625
626     put_be32(pb, f1);
627     put_be32(pb, f2);
628
629     av_reduce(&dar.num, &dar.den,
630               st->codec->width*st->codec->sample_aspect_ratio.num,
631               st->codec->height*st->codec->sample_aspect_ratio.den,
632               1024*1024);
633
634     mxf_write_local_tag(pb, 8, 0x320E);
635     put_be32(pb, dar.num);
636     put_be32(pb, dar.den);
637
638     mxf_write_local_tag(pb, 16, 0x3201);
639     put_buffer(pb, *sc->codec_ul, 16);
640 }
641
642 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
643 {
644     ByteIOContext *pb = s->pb;
645
646     mxf_write_generic_desc(pb, st, key, size);
647
648     // audio locked
649     mxf_write_local_tag(pb, 1, 0x3D02);
650     put_byte(pb, 1);
651
652     // write audio sampling rate
653     mxf_write_local_tag(pb, 8, 0x3D03);
654     put_be32(pb, st->codec->sample_rate);
655     put_be32(pb, 1);
656
657     mxf_write_local_tag(pb, 4, 0x3D07);
658     put_be32(pb, st->codec->channels);
659
660     mxf_write_local_tag(pb, 4, 0x3D01);
661     put_be32(pb, st->codec->bits_per_coded_sample);
662 }
663
664 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)
665 {
666     mxf_write_generic_sound_desc(s, st, mxf_wav_descriptor_key, 93);
667 }
668
669 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)
670 {
671     mxf_write_generic_sound_desc(s, st, mxf_aes3_descriptor_key, 93);
672 }
673
674 static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)
675 {
676     ByteIOContext *pb = s->pb;
677     int i;
678
679     if (type == MaterialPackage) {
680         mxf_write_metadata_key(pb, 0x013600);
681         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);
682         klv_encode_ber_length(pb, 92 + 16 * s->nb_streams);
683     } else {
684         mxf_write_metadata_key(pb, 0x013700);
685         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);
686         klv_encode_ber_length(pb, 112 + 16 * s->nb_streams); // 20 bytes length for descriptor reference
687     }
688
689     // write uid
690     mxf_write_local_tag(pb, 16, 0x3C0A);
691     mxf_write_uuid(pb, type, 0);
692     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);
693     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);
694
695     // write package umid
696     mxf_write_local_tag(pb, 32, 0x4401);
697     mxf_write_umid(pb, type, 0);
698     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);
699
700     // write create date
701     mxf_write_local_tag(pb, 8, 0x4405);
702     put_be64(pb, 0);
703
704     // write modified date
705     mxf_write_local_tag(pb, 8, 0x4404);
706     put_be64(pb, 0);
707
708     // write track refs
709     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x4403);
710     mxf_write_refs_count(pb, s->nb_streams);
711     for (i = 0; i < s->nb_streams; i++)
712         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);
713
714     // write multiple descriptor reference
715     if (type == SourcePackage) {
716         mxf_write_local_tag(pb, 16, 0x4701);
717         if (s->nb_streams > 1) {
718             mxf_write_uuid(pb, MultipleDescriptor, 0);
719             mxf_write_multi_descriptor(s);
720         } else
721             mxf_write_uuid(pb, SubDescriptor, 0);
722     }
723
724     for (i = 0; i < s->nb_streams; i++) {
725         AVStream *st = s->streams[i];
726         mxf_write_track(s, st, type);
727         mxf_write_sequence(s, st, type);
728         mxf_write_structural_component(s, st, type);
729
730         if (type == SourcePackage) {
731             MXFStreamContext *sc = st->priv_data;
732             mxf_essence_container_uls[sc->index].write_desc(s, st);
733         }
734     }
735 }
736
737 static int mxf_write_essence_container_data(AVFormatContext *s)
738 {
739     ByteIOContext *pb = s->pb;
740
741     mxf_write_metadata_key(pb, 0x012300);
742     klv_encode_ber_length(pb, 64);
743
744     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID
745     mxf_write_uuid(pb, EssenceContainerData, 0);
746
747     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID
748     mxf_write_umid(pb, SourcePackage, 0);
749
750     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID
751     put_be32(pb, 1);
752
753     return 0;
754 }
755
756 static int mxf_write_header_metadata_sets(AVFormatContext *s)
757 {
758     mxf_write_preface(s);
759     mxf_write_identification(s);
760     mxf_write_content_storage(s);
761     mxf_write_package(s, MaterialPackage);
762     mxf_write_package(s, SourcePackage);
763     mxf_write_essence_container_data(s);
764     return 0;
765 }
766
767 static void mxf_write_partition(AVFormatContext *s, int bodysid, const uint8_t *key, int write_metadata)
768 {
769     MXFContext *mxf = s->priv_data;
770     ByteIOContext *pb = s->pb;
771     int64_t header_byte_count_offset;
772
773     // write klv
774     put_buffer(pb, key, 16);
775
776     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);
777
778     // write partition value
779     put_be16(pb, 1); // majorVersion
780     put_be16(pb, 2); // minorVersion
781     put_be32(pb, 1); // kagSize
782
783     put_be64(pb, url_ftell(pb) - 25); // thisPartition
784     put_be64(pb, 0); // previousPartition
785
786     put_be64(pb, mxf->footer_partition_offset); // footerPartition
787
788     // set offset
789     header_byte_count_offset = url_ftell(pb);
790     put_be64(pb, 0); // headerByteCount, update later
791
792     // no indexTable
793     put_be64(pb, 0); // indexByteCount
794     put_be32(pb, 0); // indexSID
795     put_be64(pb, 0); // bodyOffset
796
797     put_be32(pb, bodysid); // bodySID
798     put_buffer(pb, op1a_ul, 16); // operational pattern
799
800     // essence container
801     mxf_write_essence_container_refs(s);
802
803     if (write_metadata) {
804         // mark the start of the headermetadata and calculate metadata size
805         int64_t pos, start = url_ftell(s->pb);
806         mxf_write_primer_pack(s);
807         mxf_write_header_metadata_sets(s);
808         pos = url_ftell(s->pb);
809         // update header_byte_count
810         url_fseek(pb, header_byte_count_offset, SEEK_SET);
811         put_be64(pb, pos - start);
812         url_fseek(pb, pos, SEEK_SET);
813     }
814
815     put_flush_packet(pb);
816 }
817
818 static const UID mxf_mpeg2_codec_uls[] = {
819     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame
820     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP
821     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame
822     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP
823     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame
824     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP
825     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame
826     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP
827 };
828
829 static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)
830 {
831     if (avctx->profile == 4) { // Main
832         if (avctx->level == 8) // Main
833             return avctx->gop_size ?
834                 &mxf_mpeg2_codec_uls[1] :
835                 &mxf_mpeg2_codec_uls[0];
836         else if (avctx->level == 4) // High
837             return avctx->gop_size ?
838                 &mxf_mpeg2_codec_uls[5] :
839                 &mxf_mpeg2_codec_uls[4];
840     } else if (avctx->profile == 0) { // 422
841         if (avctx->level == 5) // Main
842             return avctx->gop_size ?
843                 &mxf_mpeg2_codec_uls[3] :
844                 &mxf_mpeg2_codec_uls[2];
845         else if (avctx->level == 2) // High
846             return avctx->gop_size ?
847                 &mxf_mpeg2_codec_uls[7] :
848                 &mxf_mpeg2_codec_uls[6];
849     }
850     return NULL;
851 }
852
853 static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)
854 {
855     MXFStreamContext *sc = st->priv_data;
856     uint32_t c = -1;
857     int i;
858
859     for(i = 0; i < pkt->size - 4; i++) {
860         c = (c<<8) + pkt->data[i];
861         if (c == 0x1B5) {
862             if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
863                 st->codec->profile = pkt->data[i+1] & 0x07;
864                 st->codec->level   = pkt->data[i+2] >> 4;
865             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext
866                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame
867                 break;
868             }
869         }
870     }
871     sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);
872     return !!sc->codec_ul;
873 }
874
875 static int ff_audio_interleave_init(AVFormatContext *s, const int *samples_per_frame)
876 {
877     int i;
878
879     if (!samples_per_frame)
880         samples_per_frame = PAL_samples_per_frame;
881
882     for (i = 0; i < s->nb_streams; i++) {
883         AVStream *st = s->streams[i];
884         AudioInterleaveContext *aic = st->priv_data;
885
886         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
887             aic->sample_size = (st->codec->channels *
888                                 av_get_bits_per_sample(st->codec->codec_id)) / 8;
889             if (!aic->sample_size) {
890                 av_log(s, AV_LOG_ERROR, "could not compute sample size\n");
891                 return -1;
892             }
893             aic->samples_per_frame = samples_per_frame;
894             aic->samples = aic->samples_per_frame;
895
896             av_fifo_init(&aic->fifo, 100 * *aic->samples);
897         }
898     }
899
900     return 0;
901 }
902
903 static int mxf_write_header(AVFormatContext *s)
904 {
905     MXFContext *mxf = s->priv_data;
906     int i;
907     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};
908     const int *samples_per_frame = NULL;
909
910     for (i = 0; i < s->nb_streams; i++) {
911         AVStream *st = s->streams[i];
912         MXFStreamContext *sc = av_mallocz(sizeof(*sc));
913         if (!sc)
914             return AVERROR(ENOMEM);
915         st->priv_data = sc;
916
917         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
918             if (!av_cmp_q(st->codec->time_base, (AVRational){ 1, 25 })) {
919                 samples_per_frame = PAL_samples_per_frame;
920                 mxf->time_base = (AVRational){ 1, 25 };
921             } else if (!av_cmp_q(st->codec->time_base, (AVRational){ 1001, 30000 })) {
922                 samples_per_frame = NTSC_samples_per_frame;
923                 mxf->time_base = (AVRational){ 1001, 30000 };
924             } else {
925                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");
926                 return -1;
927             }
928         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
929             if (st->codec->sample_rate != 48000) {
930                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");
931                 return -1;
932             }
933         }
934         sc->duration = -1;
935
936         sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);
937         if (sc->index == -1) {
938             av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "
939                    "codec not currently supported in container\n", i);
940             return -1;
941         }
942
943         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;
944
945         if (!present[sc->index]) {
946             mxf->essence_containers_indices[mxf->essence_container_count++] = sc->index;
947             present[sc->index] = 1;
948         } else
949             present[sc->index]++;
950         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);
951         sc->track_essence_element_key[15] = present[sc->index];
952         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);
953     }
954
955     for (i = 0; i < s->nb_streams; i++) {
956         MXFStreamContext *sc = s->streams[i]->priv_data;
957         av_set_pts_info(s->streams[i], 64, mxf->time_base.num, mxf->time_base.den);
958         // update element count
959         sc->track_essence_element_key[13] = present[sc->index];
960         sc->order = AV_RB32(sc->track_essence_element_key+12);
961     }
962
963     if (ff_audio_interleave_init(s, samples_per_frame) < 0)
964         return -1;
965
966     return 0;
967 }
968
969 static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
970 {
971     MXFContext *mxf = s->priv_data;
972     ByteIOContext *pb = s->pb;
973     AVStream *st = s->streams[pkt->stream_index];
974     MXFStreamContext *sc = st->priv_data;
975
976     if (!mxf->header_written) {
977         if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
978             if (!mxf_parse_mpeg2_frame(s, st, pkt)) {
979                 av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
980                 return -1;
981             }
982         }
983         mxf_write_partition(s, 1, header_open_partition_key, 1);
984         mxf->header_written = 1;
985     }
986
987     put_buffer(pb, sc->track_essence_element_key, 16); // write key
988     klv_encode_ber_length(pb, pkt->size); // write length
989     put_buffer(pb, pkt->data, pkt->size); // write value
990
991     sc->duration = FFMAX(pkt->pts + pkt->duration, sc->duration);
992
993     put_flush_packet(pb);
994     return 0;
995 }
996
997 static int mxf_write_footer(AVFormatContext *s)
998 {
999     MXFContext *mxf = s->priv_data;
1000     ByteIOContext *pb = s->pb;
1001
1002     mxf->footer_partition_offset = url_ftell(pb);
1003     mxf_write_partition(s, 0, footer_partition_key, 0);
1004     if (!url_is_streamed(s->pb)) {
1005         url_fseek(pb, 0, SEEK_SET);
1006         mxf_write_partition(s, 1, header_closed_partition_key, 1);
1007     }
1008     mxf_free(s);
1009     return 0;
1010 }
1011
1012 static int mxf_interleave_new_audio_packet(AVFormatContext *s, AVPacket *pkt,
1013                                            int stream_index, int flush)
1014 {
1015     AVStream *st = s->streams[stream_index];
1016     AudioInterleaveContext *aic = st->priv_data;
1017
1018     int size = FFMIN(av_fifo_size(&aic->fifo), *aic->samples * aic->sample_size);
1019     if (!size || (!flush && size == av_fifo_size(&aic->fifo)))
1020         return 0;
1021
1022     av_new_packet(pkt, size);
1023     av_fifo_read(&aic->fifo, pkt->data, size);
1024
1025     pkt->dts = pkt->pts = aic->dts;
1026     pkt->duration = av_rescale_q(*aic->samples,
1027                                  (AVRational){ 1, st->codec->sample_rate },
1028                                  st->time_base);
1029     pkt->stream_index = stream_index;
1030     aic->dts += pkt->duration;
1031
1032     aic->samples++;
1033     if (!*aic->samples)
1034         aic->samples = aic->samples_per_frame;
1035
1036     return size;
1037 }
1038
1039 static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, int flush)
1040 {
1041     AVPacketList *pktl;
1042     int stream_count = 0;
1043     int streams[MAX_STREAMS];
1044
1045     memset(streams, 0, sizeof(streams));
1046     pktl = s->packet_buffer;
1047     while (pktl) {
1048         //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);
1049         if (!streams[pktl->pkt.stream_index])
1050             stream_count++;
1051         streams[pktl->pkt.stream_index]++;
1052         pktl = pktl->next;
1053     }
1054
1055     if (stream_count && (s->nb_streams == stream_count || flush)) {
1056         pktl = s->packet_buffer;
1057         *out = pktl->pkt;
1058         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);
1059         s->packet_buffer = pktl->next;
1060         av_freep(&pktl);
1061
1062         if (flush && stream_count < s->nb_streams) {
1063             // purge packet queue
1064             pktl = s->packet_buffer;
1065             while (pktl) {
1066                 AVPacketList *next = pktl->next;
1067                 av_free_packet(&pktl->pkt);
1068                 av_freep(&pktl);
1069                 pktl = next;
1070             }
1071             s->packet_buffer = NULL;
1072         }
1073
1074         return 1;
1075     } else {
1076         av_init_packet(out);
1077         return 0;
1078     }
1079 }
1080
1081 static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
1082 {
1083     AVStream *st  = s->streams[pkt ->stream_index];
1084     AVStream *st2 = s->streams[next->stream_index];
1085     MXFStreamContext *sc  = st ->priv_data;
1086     MXFStreamContext *sc2 = st2->priv_data;
1087
1088     int64_t left  = st2->time_base.num * (int64_t)st ->time_base.den;
1089     int64_t right = st ->time_base.num * (int64_t)st2->time_base.den;
1090
1091     return next->dts * left > pkt->dts * right || // FIXME this can overflow
1092         (next->dts * left == pkt->dts * right && sc->order < sc2->order);
1093 }
1094
1095 static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1096 {
1097     int i;
1098
1099     if (pkt) {
1100         AVStream *st = s->streams[pkt->stream_index];
1101         AudioInterleaveContext *aic = st->priv_data;
1102         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1103             av_fifo_generic_write(&aic->fifo, pkt->data, pkt->size, NULL);
1104         } else {
1105             // rewrite pts and dts to be decoded time line position
1106             pkt->pts = pkt->dts = aic->dts;
1107             aic->dts += pkt->duration;
1108             ff_interleave_add_packet(s, pkt, mxf_compare_timestamps);
1109         }
1110     }
1111
1112     for (i = 0; i < s->nb_streams; i++) {
1113         AVStream *st = s->streams[i];
1114         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1115             AVPacket new_pkt;
1116             while (mxf_interleave_new_audio_packet(s, &new_pkt, i, flush))
1117                 ff_interleave_add_packet(s, &new_pkt, mxf_compare_timestamps);
1118         }
1119     }
1120
1121     return mxf_interleave_get_packet(s, out, flush);
1122 }
1123
1124 AVOutputFormat mxf_muxer = {
1125     "mxf",
1126     NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1127     NULL,
1128     "mxf",
1129     sizeof(MXFContext),
1130     CODEC_ID_PCM_S16LE,
1131     CODEC_ID_MPEG2VIDEO,
1132     mxf_write_header,
1133     mxf_write_packet,
1134     mxf_write_footer,
1135     0,
1136     NULL,
1137     mxf_interleave,
1138 };
1139
1140