13b125a0282d20adc364f581577f4352ce34d3c2
[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 "libavutil/fifo.h"
36 #include "mxf.h"
37
38 static const int NTSC_samples_per_frame[] = { 1602, 1601, 1602, 1601, 1602, 0 };
39 static const int PAL_samples_per_frame[]  = { 1920, 0 };
40
41 typedef struct {
42     AVFifoBuffer fifo;
43     unsigned fifo_size;           ///< current fifo size allocated
44     uint64_t dts;                 ///< current dts
45     int sample_size;              ///< size of one sample all channels included
46     const int *samples_per_frame; ///< must be 0 terminated
47     const int *samples;           ///< current samples per frame, pointer to samples_per_frame
48 } AudioInterleaveContext;
49
50 typedef struct {
51     int local_tag;
52     UID uid;
53 } MXFLocalTagPair;
54
55 typedef struct {
56     AudioInterleaveContext aic;
57     UID track_essence_element_key;
58     int index;            ///< index in mxf_essence_container_uls table
59     const UID *codec_ul;
60     int64_t duration;
61     int order;            ///< interleaving order if dts are equal
62     int interlaced;       ///< wether picture is interlaced
63 } MXFStreamContext;
64
65 typedef struct {
66     UID container_ul;
67     UID element_ul;
68     UID codec_ul;
69     enum CodecID id;
70     void (*write_desc)();
71 } MXFContainerEssenceEntry;
72
73 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st);
74 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st);
75 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st);
76
77 static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {
78     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },
79       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },
80       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },
81       CODEC_ID_MPEG2VIDEO, mxf_write_mpegvideo_desc },
82     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },
83       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },
84       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
85       CODEC_ID_PCM_S16LE, mxf_write_aes3_desc },
86     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },
87       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },
88       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
89       CODEC_ID_PCM_S16LE, mxf_write_wav_desc },
90     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
91       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
92       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
93       CODEC_ID_NONE, NULL },
94 };
95
96 typedef struct MXFContext {
97     int64_t footer_partition_offset;
98     int essence_container_count;
99     uint8_t essence_containers_indices[FF_ARRAY_ELEMS(mxf_essence_container_uls)];
100     AVRational time_base;
101     int header_written;
102 } MXFContext;
103
104 static const uint8_t uuid_base[]            = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };
105 static const uint8_t umid_base[]            = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x01,0x0D,0x00,0x13,0x00,0x00,0x00 };
106
107 /**
108  * complete key for operation pattern, partitions, and primer pack
109  */
110 static const uint8_t op1a_ul[]              = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x01,0x00 };
111 static const uint8_t footer_partition_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }; // ClosedComplete
112 static const uint8_t primer_pack_key[]      = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x05,0x01,0x00 };
113
114
115 static const uint8_t header_open_partition_key[]   = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }; // OpenIncomplete
116 static const uint8_t header_closed_partition_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }; // ClosedComplete
117
118 /**
119  * partial key for header metadata
120  */
121 static const uint8_t header_metadata_key[]  = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01 };
122
123 static const uint8_t multiple_desc_ul[] = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x0D,0x01,0x03,0x01,0x02,0x7F,0x01,0x00 };
124
125 /**
126  * SMPTE RP210 http://www.smpte-ra.org/mdd/index.html
127  */
128 static const MXFLocalTagPair mxf_local_tag_batch[] = {
129     // preface set
130     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */
131     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */
132     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */
133     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */
134     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */
135     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */
136     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */
137     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */
138     // Identification
139     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */
140     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */
141     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */
142     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */
143     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */
144     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */
145     // Content Storage
146     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */
147     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */
148     // Essence Container Data
149     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */
150     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */
151     // Package
152     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */
153     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */
154     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */
155     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */
156     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */
157     // Track
158     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */
159     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */
160     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */
161     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */
162     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */
163     // Sequence
164     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */
165     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */
166     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */
167     // Source Clip
168     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */
169     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */
170     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */
171     // File Descriptor
172     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */
173     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */
174     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */
175     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */
176     // Generic Picture Essence Descriptor
177     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */
178     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */
179     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */
180     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */
181     { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */
182     { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */
183     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */
184     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */
185     // Generic Sound Essence Descriptor
186     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */
187     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */
188     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */
189     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */
190     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */
191     // MPEG video Descriptor
192     { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */
193 };
194
195 static void mxf_write_uuid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
196 {
197     put_buffer(pb, uuid_base, 12);
198     put_be16(pb, type);
199     put_be16(pb, value);
200 }
201
202 static void mxf_write_umid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
203 {
204     put_buffer(pb, umid_base, 16);
205     mxf_write_uuid(pb, type, value);
206 }
207
208 static void mxf_write_refs_count(ByteIOContext *pb, int ref_count)
209 {
210     put_be32(pb, ref_count);
211     put_be32(pb, 16);
212 }
213
214 static int klv_encode_ber_length(ByteIOContext *pb, uint64_t len)
215 {
216     // Determine the best BER size
217     int size;
218     if (len < 128) {
219         //short form
220         put_byte(pb, len);
221         return 1;
222     }
223
224     size = (av_log2(len) >> 3) + 1;
225
226     // long form
227     put_byte(pb, 0x80 + size);
228     while(size) {
229         size --;
230         put_byte(pb, len >> 8 * size & 0xff);
231     }
232     return 0;
233 }
234
235 /*
236  * Get essence container ul index
237  */
238 static int mxf_get_essence_container_ul_index(enum CodecID id)
239 {
240     int i;
241     for (i = 0; i < FF_ARRAY_ELEMS(mxf_essence_container_uls); i++)
242         if (mxf_essence_container_uls[i].id == id)
243             return i;
244     return -1;
245 }
246
247 static void mxf_write_primer_pack(AVFormatContext *s)
248 {
249     ByteIOContext *pb = s->pb;
250     int local_tag_number, i = 0;
251
252     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);
253
254     put_buffer(pb, primer_pack_key, 16);
255     klv_encode_ber_length(pb, local_tag_number * 18 + 8);
256
257     put_be32(pb, local_tag_number); // local_tag num
258     put_be32(pb, 18); // item size, always 18 according to the specs
259
260     for (i = 0; i < local_tag_number; i++) {
261         put_be16(pb, mxf_local_tag_batch[i].local_tag);
262         put_buffer(pb, mxf_local_tag_batch[i].uid, 16);
263     }
264 }
265
266 static void mxf_write_local_tag(ByteIOContext *pb, int size, int tag)
267 {
268     put_be16(pb, tag);
269     put_be16(pb, size);
270 }
271
272 static void mxf_write_metadata_key(ByteIOContext *pb, unsigned int value)
273 {
274     put_buffer(pb, header_metadata_key, 13);
275     put_be24(pb, value);
276 }
277
278 static void mxf_free(AVFormatContext *s)
279 {
280     int i;
281
282     for (i = 0; i < s->nb_streams; i++) {
283         AVStream *st = s->streams[i];
284         av_freep(&st->priv_data);
285     }
286 }
287
288 static const MXFDataDefinitionUL *mxf_get_data_definition_ul(enum CodecType type)
289 {
290     const MXFDataDefinitionUL *uls = ff_mxf_data_definition_uls;
291     while (uls->type != CODEC_TYPE_DATA) {
292         if (type == uls->type)
293             break;
294         uls++;
295     }
296     return uls;
297 }
298
299 static void mxf_write_essence_container_refs(AVFormatContext *s)
300 {
301     MXFContext *c = s->priv_data;
302     ByteIOContext *pb = s->pb;
303     int i;
304
305     mxf_write_refs_count(pb, c->essence_container_count);
306     av_log(s,AV_LOG_DEBUG, "essence container count:%d\n", c->essence_container_count);
307     for (i = 0; i < c->essence_container_count; i++) {
308         put_buffer(pb, mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul, 16);
309         PRINT_KEY(s, "essence container ul:\n", mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul);
310     }
311 }
312
313 static void mxf_write_preface(AVFormatContext *s)
314 {
315     MXFContext *mxf = s->priv_data;
316     ByteIOContext *pb = s->pb;
317
318     mxf_write_metadata_key(pb, 0x012f00);
319     PRINT_KEY(s, "preface key", pb->buf_ptr - 16);
320     klv_encode_ber_length(pb, 130 + 16 * mxf->essence_container_count);
321
322     // write preface set uid
323     mxf_write_local_tag(pb, 16, 0x3C0A);
324     mxf_write_uuid(pb, Preface, 0);
325     PRINT_KEY(s, "preface uid", pb->buf_ptr - 16);
326
327     // write create date as unknown
328     mxf_write_local_tag(pb, 8, 0x3B02);
329     put_be64(pb, 0);
330
331     // write version
332     mxf_write_local_tag(pb, 2, 0x3B05);
333     put_be16(pb, 1);
334
335     // write identification_refs
336     mxf_write_local_tag(pb, 16 + 8, 0x3B06);
337     mxf_write_refs_count(pb, 1);
338     mxf_write_uuid(pb, Identification, 0);
339
340     // write content_storage_refs
341     mxf_write_local_tag(pb, 16, 0x3B03);
342     mxf_write_uuid(pb, ContentStorage, 0);
343
344     mxf_write_local_tag(pb, 16, 0x3B09);
345     put_buffer(pb, op1a_ul, 16);
346
347     // write essence_container_refs
348     mxf_write_local_tag(pb, 8 + 16 * mxf->essence_container_count, 0x3B0A);
349     mxf_write_essence_container_refs(s);
350
351     // write dm_scheme_refs
352     mxf_write_local_tag(pb, 8, 0x3B0B);
353     put_be64(pb, 0);
354 }
355
356 /*
357  * Write a local tag containing an ascii string as utf-16
358  */
359 static void mxf_write_local_tag_utf16(ByteIOContext *pb, int tag, const char *value)
360 {
361     int i, size = strlen(value);
362     mxf_write_local_tag(pb, size*2, tag);
363     for (i = 0; i < size; i++)
364         put_be16(pb, value[i]);
365 }
366
367 static void mxf_write_identification(AVFormatContext *s)
368 {
369     ByteIOContext *pb = s->pb;
370     const char *company = "FFmpeg";
371     const char *product = "OP1a Muxer";
372     const char *version;
373     int length;
374
375     mxf_write_metadata_key(pb, 0x013000);
376     PRINT_KEY(s, "identification key", pb->buf_ptr - 16);
377
378     version = s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT ?
379         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);
380     length = 84 + (strlen(company)+strlen(product)+strlen(version))*2; // utf-16
381     klv_encode_ber_length(pb, length);
382
383     // write uid
384     mxf_write_local_tag(pb, 16, 0x3C0A);
385     mxf_write_uuid(pb, Identification, 0);
386     PRINT_KEY(s, "identification uid", pb->buf_ptr - 16);
387
388     // write generation uid
389     mxf_write_local_tag(pb, 16, 0x3C09);
390     mxf_write_uuid(pb, Identification, 1);
391
392     mxf_write_local_tag_utf16(pb, 0x3C01, company); // Company Name
393     mxf_write_local_tag_utf16(pb, 0x3C02, product); // Product Name
394     mxf_write_local_tag_utf16(pb, 0x3C04, version); // Version String
395
396     // write product uid
397     mxf_write_local_tag(pb, 16, 0x3C05);
398     mxf_write_uuid(pb, Identification, 2);
399
400     // write modified date
401     mxf_write_local_tag(pb, 8, 0x3C06);
402     put_be64(pb, 0);
403 }
404
405 static void mxf_write_content_storage(AVFormatContext *s)
406 {
407     ByteIOContext *pb = s->pb;
408
409     mxf_write_metadata_key(pb, 0x011800);
410     PRINT_KEY(s, "content storage key", pb->buf_ptr - 16);
411     klv_encode_ber_length(pb, 92);
412
413     // write uid
414     mxf_write_local_tag(pb, 16, 0x3C0A);
415     mxf_write_uuid(pb, ContentStorage, 0);
416     PRINT_KEY(s, "content storage uid", pb->buf_ptr - 16);
417
418     // write package reference
419     mxf_write_local_tag(pb, 16 * 2 + 8, 0x1901);
420     mxf_write_refs_count(pb, 2);
421     mxf_write_uuid(pb, MaterialPackage, 0);
422     mxf_write_uuid(pb, SourcePackage, 0);
423
424     // write essence container data
425     mxf_write_local_tag(pb, 8 + 16, 0x1902);
426     mxf_write_refs_count(pb, 1);
427     mxf_write_uuid(pb, EssenceContainerData, 0);
428 }
429
430 static void mxf_write_track(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
431 {
432     ByteIOContext *pb = s->pb;
433     MXFStreamContext *sc = st->priv_data;
434
435     mxf_write_metadata_key(pb, 0x013b00);
436     PRINT_KEY(s, "track key", pb->buf_ptr - 16);
437     klv_encode_ber_length(pb, 80);
438
439     // write track uid
440     mxf_write_local_tag(pb, 16, 0x3C0A);
441     mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, st->index);
442     PRINT_KEY(s, "track uid", pb->buf_ptr - 16);
443
444     // write track id
445     mxf_write_local_tag(pb, 4, 0x4801);
446     put_be32(pb, st->index);
447
448     // write track number
449     mxf_write_local_tag(pb, 4, 0x4804);
450     if (type == MaterialPackage)
451         put_be32(pb, 0); // track number of material package is 0
452     else
453         put_buffer(pb, sc->track_essence_element_key + 12, 4);
454
455     mxf_write_local_tag(pb, 8, 0x4B01);
456     put_be32(pb, st->time_base.den);
457     put_be32(pb, st->time_base.num);
458
459     // write origin
460     mxf_write_local_tag(pb, 8, 0x4B02);
461     put_be64(pb, 0);
462
463     // write sequence refs
464     mxf_write_local_tag(pb, 16, 0x4803);
465     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
466 }
467
468 static void mxf_write_common_fields(ByteIOContext *pb, AVStream *st)
469 {
470     const MXFDataDefinitionUL *data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);
471     MXFStreamContext *sc = st->priv_data;
472
473     // find data define uls
474     mxf_write_local_tag(pb, 16, 0x0201);
475     put_buffer(pb, data_def_ul->uid, 16);
476
477     // write duration
478     mxf_write_local_tag(pb, 8, 0x0202);
479     put_be64(pb, sc->duration);
480 }
481
482 static void mxf_write_sequence(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
483 {
484     ByteIOContext *pb = s->pb;
485
486     mxf_write_metadata_key(pb, 0x010f00);
487     PRINT_KEY(s, "sequence key", pb->buf_ptr - 16);
488     klv_encode_ber_length(pb, 80);
489
490     mxf_write_local_tag(pb, 16, 0x3C0A);
491     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
492
493     PRINT_KEY(s, "sequence uid", pb->buf_ptr - 16);
494     mxf_write_common_fields(pb, st);
495
496     // write structural component
497     mxf_write_local_tag(pb, 16 + 8, 0x1001);
498     mxf_write_refs_count(pb, 1);
499     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
500 }
501
502 static void mxf_write_structural_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
503 {
504     ByteIOContext *pb = s->pb;
505     int i;
506
507     mxf_write_metadata_key(pb, 0x011100);
508     PRINT_KEY(s, "sturctural component key", pb->buf_ptr - 16);
509     klv_encode_ber_length(pb, 108);
510
511     // write uid
512     mxf_write_local_tag(pb, 16, 0x3C0A);
513     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
514
515     PRINT_KEY(s, "structural component uid", pb->buf_ptr - 16);
516     mxf_write_common_fields(pb, st);
517
518     // write start_position
519     mxf_write_local_tag(pb, 8, 0x1201);
520     put_be64(pb, 0);
521
522     // write source package uid, end of the reference
523     mxf_write_local_tag(pb, 32, 0x1101);
524     if (type == SourcePackage) {
525         for (i = 0; i < 4; i++)
526             put_be64(pb, 0);
527     } else
528         mxf_write_umid(pb, SourcePackage, 0);
529
530     // write source track id
531     mxf_write_local_tag(pb, 4, 0x1102);
532     if (type == SourcePackage)
533         put_be32(pb, 0);
534     else
535         put_be32(pb, st->index);
536 }
537
538 static void mxf_write_multi_descriptor(AVFormatContext *s)
539 {
540     ByteIOContext *pb = s->pb;
541     int i;
542
543     mxf_write_metadata_key(pb, 0x014400);
544     PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);
545     klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);
546
547     mxf_write_local_tag(pb, 16, 0x3C0A);
548     mxf_write_uuid(pb, MultipleDescriptor, 0);
549     PRINT_KEY(s, "multi_desc uid", pb->buf_ptr - 16);
550
551     // write sample rate
552     mxf_write_local_tag(pb, 8, 0x3001);
553     put_be32(pb, s->streams[0]->time_base.den);
554     put_be32(pb, s->streams[0]->time_base.num);
555
556     // write essence container ul
557     mxf_write_local_tag(pb, 16, 0x3004);
558     put_buffer(pb, multiple_desc_ul, 16);
559
560     // write sub descriptor refs
561     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x3F01);
562     mxf_write_refs_count(pb, s->nb_streams);
563     for (i = 0; i < s->nb_streams; i++)
564         mxf_write_uuid(pb, SubDescriptor, i);
565 }
566
567 static void mxf_write_generic_desc(ByteIOContext *pb, AVStream *st, const UID key, unsigned size)
568 {
569     MXFStreamContext *sc = st->priv_data;
570
571     put_buffer(pb, key, 16);
572     klv_encode_ber_length(pb, size);
573
574     mxf_write_local_tag(pb, 16, 0x3C0A);
575     mxf_write_uuid(pb, SubDescriptor, st->index);
576
577     mxf_write_local_tag(pb, 4, 0x3006);
578     put_be32(pb, st->index);
579
580     mxf_write_local_tag(pb, 8, 0x3001);
581     put_be32(pb, st->time_base.den);
582     put_be32(pb, st->time_base.num);
583
584     mxf_write_local_tag(pb, 16, 0x3004);
585     put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
586 }
587
588 static const UID mxf_mpegvideo_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 };
589 static const UID mxf_wav_descriptor_key       = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 };
590 static const UID mxf_aes3_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 };
591
592 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
593 {
594     MXFStreamContext *sc = st->priv_data;
595     ByteIOContext *pb = s->pb;
596     int stored_height = (st->codec->height+15)/16*16;
597     AVRational dar;
598     int f1, f2;
599
600     mxf_write_generic_desc(pb, st, mxf_mpegvideo_descriptor_key, 157);
601
602     mxf_write_local_tag(pb, 4, 0x3203);
603     put_be32(pb, st->codec->width);
604
605     mxf_write_local_tag(pb, 4, 0x3202);
606     put_be32(pb, stored_height>>sc->interlaced);
607
608     mxf_write_local_tag(pb, 4, 0x3209);
609     put_be32(pb, st->codec->width);
610
611     mxf_write_local_tag(pb, 4, 0x3208);
612     put_be32(pb, st->codec->height>>sc->interlaced);
613
614     // bit rate
615     mxf_write_local_tag(pb, 4, 0x8000);
616     put_be32(pb, st->codec->bit_rate);
617
618     // frame layout
619     mxf_write_local_tag(pb, 1, 0x320C);
620     put_byte(pb, sc->interlaced);
621
622     // video line map
623     mxf_write_local_tag(pb, 16, 0x320D);
624     put_be32(pb, 2);
625     put_be32(pb, 4);
626     switch (st->codec->height) {
627     case  576: f1 = 23; f2 = 336; break;
628     case  608: f1 =  7; f2 = 320; break;
629     case  480: f1 = 20; f2 = 283; break;
630     case  512: f1 =  7; f2 = 270; break;
631     case  720: f1 = 26; f2 =   0; break; // progressive
632     case 1080: f1 = 21; f2 = 584; break;
633     default:   f1 =  0; f2 =   0; break;
634     }
635
636     if (!sc->interlaced) {
637         f2  = 0;
638         f1 *= 2;
639     }
640
641     put_be32(pb, f1);
642     put_be32(pb, f2);
643
644     av_reduce(&dar.num, &dar.den,
645               st->codec->width*st->codec->sample_aspect_ratio.num,
646               st->codec->height*st->codec->sample_aspect_ratio.den,
647               1024*1024);
648
649     mxf_write_local_tag(pb, 8, 0x320E);
650     put_be32(pb, dar.num);
651     put_be32(pb, dar.den);
652
653     mxf_write_local_tag(pb, 16, 0x3201);
654     put_buffer(pb, *sc->codec_ul, 16);
655 }
656
657 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
658 {
659     ByteIOContext *pb = s->pb;
660
661     mxf_write_generic_desc(pb, st, key, size);
662
663     // audio locked
664     mxf_write_local_tag(pb, 1, 0x3D02);
665     put_byte(pb, 1);
666
667     // write audio sampling rate
668     mxf_write_local_tag(pb, 8, 0x3D03);
669     put_be32(pb, st->codec->sample_rate);
670     put_be32(pb, 1);
671
672     mxf_write_local_tag(pb, 4, 0x3D07);
673     put_be32(pb, st->codec->channels);
674
675     mxf_write_local_tag(pb, 4, 0x3D01);
676     put_be32(pb, st->codec->bits_per_coded_sample);
677 }
678
679 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)
680 {
681     mxf_write_generic_sound_desc(s, st, mxf_wav_descriptor_key, 93);
682 }
683
684 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)
685 {
686     mxf_write_generic_sound_desc(s, st, mxf_aes3_descriptor_key, 93);
687 }
688
689 static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)
690 {
691     ByteIOContext *pb = s->pb;
692     int i;
693
694     if (type == MaterialPackage) {
695         mxf_write_metadata_key(pb, 0x013600);
696         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);
697         klv_encode_ber_length(pb, 92 + 16 * s->nb_streams);
698     } else {
699         mxf_write_metadata_key(pb, 0x013700);
700         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);
701         klv_encode_ber_length(pb, 112 + 16 * s->nb_streams); // 20 bytes length for descriptor reference
702     }
703
704     // write uid
705     mxf_write_local_tag(pb, 16, 0x3C0A);
706     mxf_write_uuid(pb, type, 0);
707     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);
708     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);
709
710     // write package umid
711     mxf_write_local_tag(pb, 32, 0x4401);
712     mxf_write_umid(pb, type, 0);
713     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);
714
715     // write create date
716     mxf_write_local_tag(pb, 8, 0x4405);
717     put_be64(pb, 0);
718
719     // write modified date
720     mxf_write_local_tag(pb, 8, 0x4404);
721     put_be64(pb, 0);
722
723     // write track refs
724     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x4403);
725     mxf_write_refs_count(pb, s->nb_streams);
726     for (i = 0; i < s->nb_streams; i++)
727         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);
728
729     // write multiple descriptor reference
730     if (type == SourcePackage) {
731         mxf_write_local_tag(pb, 16, 0x4701);
732         if (s->nb_streams > 1) {
733             mxf_write_uuid(pb, MultipleDescriptor, 0);
734             mxf_write_multi_descriptor(s);
735         } else
736             mxf_write_uuid(pb, SubDescriptor, 0);
737     }
738
739     for (i = 0; i < s->nb_streams; i++) {
740         AVStream *st = s->streams[i];
741         mxf_write_track(s, st, type);
742         mxf_write_sequence(s, st, type);
743         mxf_write_structural_component(s, st, type);
744
745         if (type == SourcePackage) {
746             MXFStreamContext *sc = st->priv_data;
747             mxf_essence_container_uls[sc->index].write_desc(s, st);
748         }
749     }
750 }
751
752 static int mxf_write_essence_container_data(AVFormatContext *s)
753 {
754     ByteIOContext *pb = s->pb;
755
756     mxf_write_metadata_key(pb, 0x012300);
757     klv_encode_ber_length(pb, 64);
758
759     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID
760     mxf_write_uuid(pb, EssenceContainerData, 0);
761
762     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID
763     mxf_write_umid(pb, SourcePackage, 0);
764
765     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID
766     put_be32(pb, 1);
767
768     return 0;
769 }
770
771 static int mxf_write_header_metadata_sets(AVFormatContext *s)
772 {
773     mxf_write_preface(s);
774     mxf_write_identification(s);
775     mxf_write_content_storage(s);
776     mxf_write_package(s, MaterialPackage);
777     mxf_write_package(s, SourcePackage);
778     mxf_write_essence_container_data(s);
779     return 0;
780 }
781
782 static void mxf_write_partition(AVFormatContext *s, int bodysid, const uint8_t *key, int write_metadata)
783 {
784     MXFContext *mxf = s->priv_data;
785     ByteIOContext *pb = s->pb;
786     int64_t header_byte_count_offset;
787
788     // write klv
789     put_buffer(pb, key, 16);
790
791     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);
792
793     // write partition value
794     put_be16(pb, 1); // majorVersion
795     put_be16(pb, 2); // minorVersion
796     put_be32(pb, 1); // kagSize
797
798     put_be64(pb, url_ftell(pb) - 25); // thisPartition
799     put_be64(pb, 0); // previousPartition
800
801     put_be64(pb, mxf->footer_partition_offset); // footerPartition
802
803     // set offset
804     header_byte_count_offset = url_ftell(pb);
805     put_be64(pb, 0); // headerByteCount, update later
806
807     // no indexTable
808     put_be64(pb, 0); // indexByteCount
809     put_be32(pb, 0); // indexSID
810     put_be64(pb, 0); // bodyOffset
811
812     put_be32(pb, bodysid); // bodySID
813     put_buffer(pb, op1a_ul, 16); // operational pattern
814
815     // essence container
816     mxf_write_essence_container_refs(s);
817
818     if (write_metadata) {
819         // mark the start of the headermetadata and calculate metadata size
820         int64_t pos, start = url_ftell(s->pb);
821         mxf_write_primer_pack(s);
822         mxf_write_header_metadata_sets(s);
823         pos = url_ftell(s->pb);
824         // update header_byte_count
825         url_fseek(pb, header_byte_count_offset, SEEK_SET);
826         put_be64(pb, pos - start);
827         url_fseek(pb, pos, SEEK_SET);
828     }
829
830     put_flush_packet(pb);
831 }
832
833 static const UID mxf_mpeg2_codec_uls[] = {
834     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame
835     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP
836     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame
837     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP
838     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame
839     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP
840     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame
841     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP
842 };
843
844 static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)
845 {
846     if (avctx->profile == 4) { // Main
847         if (avctx->level == 8) // Main
848             return avctx->gop_size ?
849                 &mxf_mpeg2_codec_uls[1] :
850                 &mxf_mpeg2_codec_uls[0];
851         else if (avctx->level == 4) // High
852             return avctx->gop_size ?
853                 &mxf_mpeg2_codec_uls[5] :
854                 &mxf_mpeg2_codec_uls[4];
855     } else if (avctx->profile == 0) { // 422
856         if (avctx->level == 5) // Main
857             return avctx->gop_size ?
858                 &mxf_mpeg2_codec_uls[3] :
859                 &mxf_mpeg2_codec_uls[2];
860         else if (avctx->level == 2) // High
861             return avctx->gop_size ?
862                 &mxf_mpeg2_codec_uls[7] :
863                 &mxf_mpeg2_codec_uls[6];
864     }
865     return NULL;
866 }
867
868 static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)
869 {
870     MXFStreamContext *sc = st->priv_data;
871     uint32_t c = -1;
872     int i;
873
874     for(i = 0; i < pkt->size - 4; i++) {
875         c = (c<<8) + pkt->data[i];
876         if (c == 0x1B5) {
877             if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
878                 st->codec->profile = pkt->data[i+1] & 0x07;
879                 st->codec->level   = pkt->data[i+2] >> 4;
880             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext
881                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame
882                 break;
883             }
884         }
885     }
886     sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);
887     return !!sc->codec_ul;
888 }
889
890 static int ff_audio_interleave_init(AVFormatContext *s, const int *samples_per_frame)
891 {
892     int i;
893
894     if (!samples_per_frame)
895         return -1;
896
897     for (i = 0; i < s->nb_streams; i++) {
898         AVStream *st = s->streams[i];
899         AudioInterleaveContext *aic = st->priv_data;
900
901         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
902             aic->sample_size = (st->codec->channels *
903                                 av_get_bits_per_sample(st->codec->codec_id)) / 8;
904             if (!aic->sample_size) {
905                 av_log(s, AV_LOG_ERROR, "could not compute sample size\n");
906                 return -1;
907             }
908             aic->samples_per_frame = samples_per_frame;
909             aic->samples = aic->samples_per_frame;
910
911             av_fifo_init(&aic->fifo, 100 * *aic->samples);
912         }
913     }
914
915     return 0;
916 }
917
918 static void ff_audio_interleave_close(AVFormatContext *s)
919 {
920     int i;
921     for (i = 0; i < s->nb_streams; i++) {
922         AVStream *st = s->streams[i];
923         AudioInterleaveContext *aic = st->priv_data;
924
925         if (st->codec->codec_type == CODEC_TYPE_AUDIO)
926             av_fifo_free(&aic->fifo);
927     }
928 }
929
930 static int mxf_write_header(AVFormatContext *s)
931 {
932     MXFContext *mxf = s->priv_data;
933     int i;
934     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};
935     const int *samples_per_frame = NULL;
936
937     for (i = 0; i < s->nb_streams; i++) {
938         AVStream *st = s->streams[i];
939         MXFStreamContext *sc = av_mallocz(sizeof(*sc));
940         if (!sc)
941             return AVERROR(ENOMEM);
942         st->priv_data = sc;
943
944         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
945             if (!av_cmp_q(st->codec->time_base, (AVRational){ 1, 25 })) {
946                 samples_per_frame = PAL_samples_per_frame;
947                 mxf->time_base = (AVRational){ 1, 25 };
948             } else if (!av_cmp_q(st->codec->time_base, (AVRational){ 1001, 30000 })) {
949                 samples_per_frame = NTSC_samples_per_frame;
950                 mxf->time_base = (AVRational){ 1001, 30000 };
951             } else {
952                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");
953                 return -1;
954             }
955         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
956             if (st->codec->sample_rate != 48000) {
957                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");
958                 return -1;
959             }
960         }
961         sc->duration = -1;
962
963         sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);
964         if (sc->index == -1) {
965             av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "
966                    "codec not currently supported in container\n", i);
967             return -1;
968         }
969
970         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;
971
972         if (!present[sc->index]) {
973             mxf->essence_containers_indices[mxf->essence_container_count++] = sc->index;
974             present[sc->index] = 1;
975         } else
976             present[sc->index]++;
977         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);
978         sc->track_essence_element_key[15] = present[sc->index];
979         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);
980     }
981
982     for (i = 0; i < s->nb_streams; i++) {
983         MXFStreamContext *sc = s->streams[i]->priv_data;
984         av_set_pts_info(s->streams[i], 64, mxf->time_base.num, mxf->time_base.den);
985         // update element count
986         sc->track_essence_element_key[13] = present[sc->index];
987         sc->order = AV_RB32(sc->track_essence_element_key+12);
988     }
989
990     if (!samples_per_frame)
991         samples_per_frame = PAL_samples_per_frame;
992
993     if (ff_audio_interleave_init(s, samples_per_frame) < 0)
994         return -1;
995
996     return 0;
997 }
998
999 static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
1000 {
1001     MXFContext *mxf = s->priv_data;
1002     ByteIOContext *pb = s->pb;
1003     AVStream *st = s->streams[pkt->stream_index];
1004     MXFStreamContext *sc = st->priv_data;
1005
1006     if (!mxf->header_written) {
1007         if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
1008             if (!mxf_parse_mpeg2_frame(s, st, pkt)) {
1009                 av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
1010                 return -1;
1011             }
1012         }
1013         mxf_write_partition(s, 1, header_open_partition_key, 1);
1014         mxf->header_written = 1;
1015     }
1016
1017     put_buffer(pb, sc->track_essence_element_key, 16); // write key
1018     klv_encode_ber_length(pb, pkt->size); // write length
1019     put_buffer(pb, pkt->data, pkt->size); // write value
1020
1021     sc->duration = FFMAX(pkt->pts + pkt->duration, sc->duration);
1022
1023     put_flush_packet(pb);
1024     return 0;
1025 }
1026
1027 static int mxf_write_footer(AVFormatContext *s)
1028 {
1029     MXFContext *mxf = s->priv_data;
1030     ByteIOContext *pb = s->pb;
1031
1032     mxf->footer_partition_offset = url_ftell(pb);
1033     mxf_write_partition(s, 0, footer_partition_key, 0);
1034     if (!url_is_streamed(s->pb)) {
1035         url_fseek(pb, 0, SEEK_SET);
1036         mxf_write_partition(s, 1, header_closed_partition_key, 1);
1037     }
1038
1039     ff_audio_interleave_close(s);
1040
1041     mxf_free(s);
1042     return 0;
1043 }
1044
1045 static int mxf_interleave_new_audio_packet(AVFormatContext *s, AVPacket *pkt,
1046                                            int stream_index, int flush)
1047 {
1048     AVStream *st = s->streams[stream_index];
1049     AudioInterleaveContext *aic = st->priv_data;
1050
1051     int size = FFMIN(av_fifo_size(&aic->fifo), *aic->samples * aic->sample_size);
1052     if (!size || (!flush && size == av_fifo_size(&aic->fifo)))
1053         return 0;
1054
1055     av_new_packet(pkt, size);
1056     av_fifo_read(&aic->fifo, pkt->data, size);
1057
1058     pkt->dts = pkt->pts = aic->dts;
1059     pkt->duration = av_rescale_q(*aic->samples,
1060                                  (AVRational){ 1, st->codec->sample_rate },
1061                                  st->time_base);
1062     pkt->stream_index = stream_index;
1063     aic->dts += pkt->duration;
1064
1065     aic->samples++;
1066     if (!*aic->samples)
1067         aic->samples = aic->samples_per_frame;
1068
1069     return size;
1070 }
1071
1072 static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1073 {
1074     AVPacketList *pktl;
1075     int stream_count = 0;
1076     int streams[MAX_STREAMS];
1077
1078     memset(streams, 0, sizeof(streams));
1079     pktl = s->packet_buffer;
1080     while (pktl) {
1081         //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);
1082         if (!streams[pktl->pkt.stream_index])
1083             stream_count++;
1084         streams[pktl->pkt.stream_index]++;
1085         pktl = pktl->next;
1086     }
1087
1088     if (stream_count && (s->nb_streams == stream_count || flush)) {
1089         pktl = s->packet_buffer;
1090         *out = pktl->pkt;
1091         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);
1092         s->packet_buffer = pktl->next;
1093         av_freep(&pktl);
1094
1095         if (flush && stream_count < s->nb_streams) {
1096             // purge packet queue
1097             pktl = s->packet_buffer;
1098             while (pktl) {
1099                 AVPacketList *next = pktl->next;
1100                 av_free_packet(&pktl->pkt);
1101                 av_freep(&pktl);
1102                 pktl = next;
1103             }
1104             s->packet_buffer = NULL;
1105         }
1106
1107         return 1;
1108     } else {
1109         av_init_packet(out);
1110         return 0;
1111     }
1112 }
1113
1114 static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
1115 {
1116     AVStream *st  = s->streams[pkt ->stream_index];
1117     AVStream *st2 = s->streams[next->stream_index];
1118     MXFStreamContext *sc  = st ->priv_data;
1119     MXFStreamContext *sc2 = st2->priv_data;
1120
1121     int64_t left  = st2->time_base.num * (int64_t)st ->time_base.den;
1122     int64_t right = st ->time_base.num * (int64_t)st2->time_base.den;
1123
1124     return next->dts * left > pkt->dts * right || // FIXME this can overflow
1125         (next->dts * left == pkt->dts * right && sc->order < sc2->order);
1126 }
1127
1128 static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1129 {
1130     int i;
1131
1132     if (pkt) {
1133         AVStream *st = s->streams[pkt->stream_index];
1134         AudioInterleaveContext *aic = st->priv_data;
1135         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1136             av_fifo_generic_write(&aic->fifo, pkt->data, pkt->size, NULL);
1137         } else {
1138             // rewrite pts and dts to be decoded time line position
1139             pkt->pts = pkt->dts = aic->dts;
1140             aic->dts += pkt->duration;
1141             ff_interleave_add_packet(s, pkt, mxf_compare_timestamps);
1142         }
1143         pkt = NULL;
1144     }
1145
1146     for (i = 0; i < s->nb_streams; i++) {
1147         AVStream *st = s->streams[i];
1148         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1149             AVPacket new_pkt;
1150             while (mxf_interleave_new_audio_packet(s, &new_pkt, i, flush))
1151                 ff_interleave_add_packet(s, &new_pkt, mxf_compare_timestamps);
1152         }
1153     }
1154
1155     return mxf_interleave_get_packet(s, out, pkt, flush);
1156 }
1157
1158 AVOutputFormat mxf_muxer = {
1159     "mxf",
1160     NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1161     NULL,
1162     "mxf",
1163     sizeof(MXFContext),
1164     CODEC_ID_PCM_S16LE,
1165     CODEC_ID_MPEG2VIDEO,
1166     mxf_write_header,
1167     mxf_write_packet,
1168     mxf_write_footer,
1169     0,
1170     NULL,
1171     mxf_interleave,
1172 };