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ffmpeg / libavformat / mxfenc.c @ bd5c94b5

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/*
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 * MXF muxer
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 * Copyright (c) 2008 GUCAS, Zhentan Feng <spyfeng at gmail dot com>
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 * Copyright (c) 2008 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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/*
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 * References
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 * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
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 * SMPTE 377M MXF File Format Specifications
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 * SMPTE 379M MXF Generic Container
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 * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
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 * SMPTE RP210: SMPTE Metadata Dictionary
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 * SMPTE RP224: Registry of SMPTE Universal Labels
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 */
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//#define DEBUG
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#include <math.h>
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#include <time.h>
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#include "libavutil/fifo.h"
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#include "libavcodec/bytestream.h"
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#include "audiointerleave.h"
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#include "avformat.h"
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#include "mxf.h"
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static const int NTSC_samples_per_frame[] = { 1602, 1601, 1602, 1601, 1602, 0 };
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static const int PAL_samples_per_frame[]  = { 1920, 0 };
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#define MXF_INDEX_CLUSTER_SIZE 4096
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#define KAG_SIZE 512
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typedef struct {
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    int local_tag;
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    UID uid;
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} MXFLocalTagPair;
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typedef struct {
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    uint8_t flags;
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    uint64_t offset;
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    unsigned slice_offset; ///< offset of audio slice
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} MXFIndexEntry;
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typedef struct {
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    AudioInterleaveContext aic;
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    UID track_essence_element_key;
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    int index;            ///< index in mxf_essence_container_uls table
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    const UID *codec_ul;
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    int64_t duration;
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    int order;            ///< interleaving order if dts are equal
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    int interlaced;       ///< wether picture is interlaced
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    int temporal_reordering;
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} MXFStreamContext;
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typedef struct {
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    UID container_ul;
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    UID element_ul;
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    UID codec_ul;
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    void (*write_desc)();
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} MXFContainerEssenceEntry;
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static const struct {
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    enum CodecID id;
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    int index;
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} mxf_essence_mappings[] = {
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    { CODEC_ID_MPEG2VIDEO, 0 },
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    { CODEC_ID_PCM_S24LE,  1 },
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    { CODEC_ID_PCM_S16LE,  1 },
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    { 0 }
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};
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static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st);
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static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st);
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static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st);
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static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {
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    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },
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      { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },
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      { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },
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      mxf_write_mpegvideo_desc },
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    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },
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      { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },
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      { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
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      mxf_write_aes3_desc },
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    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },
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      { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },
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      { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
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      mxf_write_wav_desc },
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    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
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      { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
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      { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
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      NULL },
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};
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typedef struct MXFContext {
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    int64_t footer_partition_offset;
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    int essence_container_count;
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    uint8_t essence_containers_indices[FF_ARRAY_ELEMS(mxf_essence_container_uls)];
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    AVRational time_base;
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    int header_written;
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    MXFIndexEntry *index_entries;
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    unsigned edit_units_count;
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    uint64_t timestamp;   ///< timestamp, as year(16),month(8),day(8),hour(8),minutes(8),msec/4(8)
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    uint8_t slice_count;  ///< index slice count minus 1 (1 if no audio, 0 otherwise)
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} MXFContext;
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static const uint8_t uuid_base[]            = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };
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static const uint8_t umid_base[]            = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x01,0x0D,0x00,0x13,0x00,0x00,0x00 };
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/**
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 * complete key for operation pattern, partitions, and primer pack
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 */
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static const uint8_t op1a_ul[]                     = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x01,0x00 };
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static const uint8_t footer_partition_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }; // ClosedComplete
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static const uint8_t primer_pack_key[]             = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x05,0x01,0x00 };
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static const uint8_t index_table_segment_key[]     = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 };
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static const uint8_t random_index_pack_key[]       = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
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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
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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
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static const uint8_t klv_fill_key[]                = { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x03,0x01,0x02,0x10,0x01,0x00,0x00,0x00 };
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/**
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 * partial key for header metadata
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 */
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static const uint8_t header_metadata_key[]  = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01 };
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static const uint8_t multiple_desc_ul[]     = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x0D,0x01,0x03,0x01,0x02,0x7F,0x01,0x00 };
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/**
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 * SMPTE RP210 http://www.smpte-ra.org/mdd/index.html
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 */
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static const MXFLocalTagPair mxf_local_tag_batch[] = {
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    // preface set
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    { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */
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    { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */
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    { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */
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    { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */
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    { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */
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    { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */
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    { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */
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    { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */
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    // Identification
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    { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */
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    { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */
161
    { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */
162
    { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */
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    { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */
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    { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */
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    // Content Storage
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    { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */
167
    { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */
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    // Essence Container Data
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    { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */
170
    { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */
171
    // Package
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    { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */
173
    { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */
174
    { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */
175
    { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */
176
    { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */
177
    // Track
178
    { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */
179
    { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */
180
    { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */
181
    { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */
182
    { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */
183
    // Sequence
184
    { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */
185
    { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */
186
    { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */
187
    // Source Clip
188
    { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */
189
    { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */
190
    { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */
191
    // File Descriptor
192
    { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */
193
    { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */
194
    { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */
195
    { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */
196
    // Generic Picture Essence Descriptor
197
    { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */
198
    { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */
199
    { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */
200
    { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */
201
    { 0x3209, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0C,0x00,0x00,0x00}}, /* Display Width */
202
    { 0x3208, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x01,0x0B,0x00,0x00,0x00}}, /* Display Height */
203
    { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */
204
    { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */
205
    // Generic Sound Essence Descriptor
206
    { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */
207
    { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */
208
    { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */
209
    { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */
210
    { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */
211
    // Index Table Segment
212
    { 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */
213
    { 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */
214
    { 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */
215
    { 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */
216
    { 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */
217
    { 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */
218
    { 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */
219
    { 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */
220
    // MPEG video Descriptor
221
    { 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */
222
    // Wave Audio Essence Descriptor
223
    { 0x3D09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x03,0x05,0x00,0x00,0x00}}, /* Average Bytes Per Second */
224
    { 0x3D0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x02,0x01,0x00,0x00,0x00}}, /* Block Align */
225
};
226

    
227
static void mxf_write_uuid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
228
{
229
    put_buffer(pb, uuid_base, 12);
230
    put_be16(pb, type);
231
    put_be16(pb, value);
232
}
233

    
234
static void mxf_write_umid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
235
{
236
    put_buffer(pb, umid_base, 16);
237
    mxf_write_uuid(pb, type, value);
238
}
239

    
240
static void mxf_write_refs_count(ByteIOContext *pb, int ref_count)
241
{
242
    put_be32(pb, ref_count);
243
    put_be32(pb, 16);
244
}
245

    
246
static int klv_ber_length(uint64_t len)
247
{
248
    if (len < 128)
249
        return 1;
250
    else
251
        return (av_log2(len) >> 3) + 2;
252
}
253

    
254
static int klv_encode_ber_length(ByteIOContext *pb, uint64_t len)
255
{
256
    // Determine the best BER size
257
    int size;
258
    if (len < 128) {
259
        //short form
260
        put_byte(pb, len);
261
        return 1;
262
    }
263

    
264
    size = (av_log2(len) >> 3) + 1;
265

    
266
    // long form
267
    put_byte(pb, 0x80 + size);
268
    while(size) {
269
        size--;
270
        put_byte(pb, len >> 8 * size & 0xff);
271
    }
272
    return 0;
273
}
274

    
275
/*
276
 * Get essence container ul index
277
 */
278
static int mxf_get_essence_container_ul_index(enum CodecID id)
279
{
280
    int i;
281
    for (i = 0; mxf_essence_mappings[i].id; i++)
282
        if (mxf_essence_mappings[i].id == id)
283
            return mxf_essence_mappings[i].index;
284
    return -1;
285
}
286

    
287
static void mxf_write_primer_pack(AVFormatContext *s)
288
{
289
    ByteIOContext *pb = s->pb;
290
    int local_tag_number, i = 0;
291

    
292
    local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);
293

    
294
    put_buffer(pb, primer_pack_key, 16);
295
    klv_encode_ber_length(pb, local_tag_number * 18 + 8);
296

    
297
    put_be32(pb, local_tag_number); // local_tag num
298
    put_be32(pb, 18); // item size, always 18 according to the specs
299

    
300
    for (i = 0; i < local_tag_number; i++) {
301
        put_be16(pb, mxf_local_tag_batch[i].local_tag);
302
        put_buffer(pb, mxf_local_tag_batch[i].uid, 16);
303
    }
304
}
305

    
306
static void mxf_write_local_tag(ByteIOContext *pb, int size, int tag)
307
{
308
    put_be16(pb, tag);
309
    put_be16(pb, size);
310
}
311

    
312
static void mxf_write_metadata_key(ByteIOContext *pb, unsigned int value)
313
{
314
    put_buffer(pb, header_metadata_key, 13);
315
    put_be24(pb, value);
316
}
317

    
318
static void mxf_free(AVFormatContext *s)
319
{
320
    int i;
321

    
322
    for (i = 0; i < s->nb_streams; i++) {
323
        AVStream *st = s->streams[i];
324
        av_freep(&st->priv_data);
325
    }
326
}
327

    
328
static const MXFCodecUL *mxf_get_data_definition_ul(int type)
329
{
330
    const MXFCodecUL *uls = ff_mxf_data_definition_uls;
331
    while (uls->uid[0]) {
332
        if (type == uls->id)
333
            break;
334
        uls++;
335
    }
336
    return uls;
337
}
338

    
339
static void mxf_write_essence_container_refs(AVFormatContext *s)
340
{
341
    MXFContext *c = s->priv_data;
342
    ByteIOContext *pb = s->pb;
343
    int i;
344

    
345
    mxf_write_refs_count(pb, c->essence_container_count);
346
    av_log(s,AV_LOG_DEBUG, "essence container count:%d\n", c->essence_container_count);
347
    for (i = 0; i < c->essence_container_count; i++) {
348
        put_buffer(pb, mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul, 16);
349
        PRINT_KEY(s, "essence container ul:\n", mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul);
350
    }
351
}
352

    
353
static void mxf_write_preface(AVFormatContext *s)
354
{
355
    MXFContext *mxf = s->priv_data;
356
    ByteIOContext *pb = s->pb;
357

    
358
    mxf_write_metadata_key(pb, 0x012f00);
359
    PRINT_KEY(s, "preface key", pb->buf_ptr - 16);
360
    klv_encode_ber_length(pb, 130 + 16 * mxf->essence_container_count);
361

    
362
    // write preface set uid
363
    mxf_write_local_tag(pb, 16, 0x3C0A);
364
    mxf_write_uuid(pb, Preface, 0);
365
    PRINT_KEY(s, "preface uid", pb->buf_ptr - 16);
366

    
367
    // last modified date
368
    mxf_write_local_tag(pb, 8, 0x3B02);
369
    put_be64(pb, mxf->timestamp);
370

    
371
    // write version
372
    mxf_write_local_tag(pb, 2, 0x3B05);
373
    put_be16(pb, 1);
374

    
375
    // write identification_refs
376
    mxf_write_local_tag(pb, 16 + 8, 0x3B06);
377
    mxf_write_refs_count(pb, 1);
378
    mxf_write_uuid(pb, Identification, 0);
379

    
380
    // write content_storage_refs
381
    mxf_write_local_tag(pb, 16, 0x3B03);
382
    mxf_write_uuid(pb, ContentStorage, 0);
383

    
384
    // operational pattern
385
    mxf_write_local_tag(pb, 16, 0x3B09);
386
    if (s->nb_streams > 1) {
387
        put_buffer(pb, op1a_ul, 14);
388
        put_be16(pb, 0x0900); // multi track
389
    } else {
390
        put_buffer(pb, op1a_ul, 16);
391
    }
392

    
393
    // write essence_container_refs
394
    mxf_write_local_tag(pb, 8 + 16 * mxf->essence_container_count, 0x3B0A);
395
    mxf_write_essence_container_refs(s);
396

    
397
    // write dm_scheme_refs
398
    mxf_write_local_tag(pb, 8, 0x3B0B);
399
    put_be64(pb, 0);
400
}
401

    
402
/*
403
 * Write a local tag containing an ascii string as utf-16
404
 */
405
static void mxf_write_local_tag_utf16(ByteIOContext *pb, int tag, const char *value)
406
{
407
    int i, size = strlen(value);
408
    mxf_write_local_tag(pb, size*2, tag);
409
    for (i = 0; i < size; i++)
410
        put_be16(pb, value[i]);
411
}
412

    
413
static void mxf_write_identification(AVFormatContext *s)
414
{
415
    MXFContext *mxf = s->priv_data;
416
    ByteIOContext *pb = s->pb;
417
    const char *company = "FFmpeg";
418
    const char *product = "OP1a Muxer";
419
    const char *version;
420
    int length;
421

    
422
    mxf_write_metadata_key(pb, 0x013000);
423
    PRINT_KEY(s, "identification key", pb->buf_ptr - 16);
424

    
425
    version = s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT ?
426
        "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);
427
    length = 84 + (strlen(company)+strlen(product)+strlen(version))*2; // utf-16
428
    klv_encode_ber_length(pb, length);
429

    
430
    // write uid
431
    mxf_write_local_tag(pb, 16, 0x3C0A);
432
    mxf_write_uuid(pb, Identification, 0);
433
    PRINT_KEY(s, "identification uid", pb->buf_ptr - 16);
434

    
435
    // write generation uid
436
    mxf_write_local_tag(pb, 16, 0x3C09);
437
    mxf_write_uuid(pb, Identification, 1);
438

    
439
    mxf_write_local_tag_utf16(pb, 0x3C01, company); // Company Name
440
    mxf_write_local_tag_utf16(pb, 0x3C02, product); // Product Name
441
    mxf_write_local_tag_utf16(pb, 0x3C04, version); // Version String
442

    
443
    // write product uid
444
    mxf_write_local_tag(pb, 16, 0x3C05);
445
    mxf_write_uuid(pb, Identification, 2);
446

    
447
    // modification date
448
    mxf_write_local_tag(pb, 8, 0x3C06);
449
    put_be64(pb, mxf->timestamp);
450
}
451

    
452
static void mxf_write_content_storage(AVFormatContext *s)
453
{
454
    ByteIOContext *pb = s->pb;
455

    
456
    mxf_write_metadata_key(pb, 0x011800);
457
    PRINT_KEY(s, "content storage key", pb->buf_ptr - 16);
458
    klv_encode_ber_length(pb, 92);
459

    
460
    // write uid
461
    mxf_write_local_tag(pb, 16, 0x3C0A);
462
    mxf_write_uuid(pb, ContentStorage, 0);
463
    PRINT_KEY(s, "content storage uid", pb->buf_ptr - 16);
464

    
465
    // write package reference
466
    mxf_write_local_tag(pb, 16 * 2 + 8, 0x1901);
467
    mxf_write_refs_count(pb, 2);
468
    mxf_write_uuid(pb, MaterialPackage, 0);
469
    mxf_write_uuid(pb, SourcePackage, 0);
470

    
471
    // write essence container data
472
    mxf_write_local_tag(pb, 8 + 16, 0x1902);
473
    mxf_write_refs_count(pb, 1);
474
    mxf_write_uuid(pb, EssenceContainerData, 0);
475
}
476

    
477
static void mxf_write_track(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
478
{
479
    MXFContext *mxf = s->priv_data;
480
    ByteIOContext *pb = s->pb;
481
    MXFStreamContext *sc = st->priv_data;
482

    
483
    mxf_write_metadata_key(pb, 0x013b00);
484
    PRINT_KEY(s, "track key", pb->buf_ptr - 16);
485
    klv_encode_ber_length(pb, 80);
486

    
487
    // write track uid
488
    mxf_write_local_tag(pb, 16, 0x3C0A);
489
    mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, st->index);
490
    PRINT_KEY(s, "track uid", pb->buf_ptr - 16);
491

    
492
    // write track id
493
    mxf_write_local_tag(pb, 4, 0x4801);
494
    put_be32(pb, st->index);
495

    
496
    // write track number
497
    mxf_write_local_tag(pb, 4, 0x4804);
498
    if (type == MaterialPackage)
499
        put_be32(pb, 0); // track number of material package is 0
500
    else
501
        put_buffer(pb, sc->track_essence_element_key + 12, 4);
502

    
503
    mxf_write_local_tag(pb, 8, 0x4B01);
504
    put_be32(pb, mxf->time_base.den);
505
    put_be32(pb, mxf->time_base.num);
506

    
507
    // write origin
508
    mxf_write_local_tag(pb, 8, 0x4B02);
509
    put_be64(pb, 0);
510

    
511
    // write sequence refs
512
    mxf_write_local_tag(pb, 16, 0x4803);
513
    mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
514
}
515

    
516
static void mxf_write_common_fields(ByteIOContext *pb, AVStream *st)
517
{
518
    const MXFCodecUL *data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);
519
    MXFStreamContext *sc = st->priv_data;
520

    
521
    // find data define uls
522
    mxf_write_local_tag(pb, 16, 0x0201);
523
    put_buffer(pb, data_def_ul->uid, 16);
524

    
525
    // write duration
526
    mxf_write_local_tag(pb, 8, 0x0202);
527
    put_be64(pb, sc->duration);
528
}
529

    
530
static void mxf_write_sequence(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
531
{
532
    ByteIOContext *pb = s->pb;
533

    
534
    mxf_write_metadata_key(pb, 0x010f00);
535
    PRINT_KEY(s, "sequence key", pb->buf_ptr - 16);
536
    klv_encode_ber_length(pb, 80);
537

    
538
    mxf_write_local_tag(pb, 16, 0x3C0A);
539
    mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
540

    
541
    PRINT_KEY(s, "sequence uid", pb->buf_ptr - 16);
542
    mxf_write_common_fields(pb, st);
543

    
544
    // write structural component
545
    mxf_write_local_tag(pb, 16 + 8, 0x1001);
546
    mxf_write_refs_count(pb, 1);
547
    mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
548
}
549

    
550
static void mxf_write_structural_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
551
{
552
    ByteIOContext *pb = s->pb;
553
    int i;
554

    
555
    mxf_write_metadata_key(pb, 0x011100);
556
    PRINT_KEY(s, "sturctural component key", pb->buf_ptr - 16);
557
    klv_encode_ber_length(pb, 108);
558

    
559
    // write uid
560
    mxf_write_local_tag(pb, 16, 0x3C0A);
561
    mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
562

    
563
    PRINT_KEY(s, "structural component uid", pb->buf_ptr - 16);
564
    mxf_write_common_fields(pb, st);
565

    
566
    // write start_position
567
    mxf_write_local_tag(pb, 8, 0x1201);
568
    put_be64(pb, 0);
569

    
570
    // write source package uid, end of the reference
571
    mxf_write_local_tag(pb, 32, 0x1101);
572
    if (type == SourcePackage) {
573
        for (i = 0; i < 4; i++)
574
            put_be64(pb, 0);
575
    } else
576
        mxf_write_umid(pb, SourcePackage, 0);
577

    
578
    // write source track id
579
    mxf_write_local_tag(pb, 4, 0x1102);
580
    if (type == SourcePackage)
581
        put_be32(pb, 0);
582
    else
583
        put_be32(pb, st->index);
584
}
585

    
586
static void mxf_write_multi_descriptor(AVFormatContext *s)
587
{
588
    MXFContext *mxf = s->priv_data;
589
    ByteIOContext *pb = s->pb;
590
    int i;
591

    
592
    mxf_write_metadata_key(pb, 0x014400);
593
    PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);
594
    klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);
595

    
596
    mxf_write_local_tag(pb, 16, 0x3C0A);
597
    mxf_write_uuid(pb, MultipleDescriptor, 0);
598
    PRINT_KEY(s, "multi_desc uid", pb->buf_ptr - 16);
599

    
600
    // write sample rate
601
    mxf_write_local_tag(pb, 8, 0x3001);
602
    put_be32(pb, mxf->time_base.den);
603
    put_be32(pb, mxf->time_base.num);
604

    
605
    // write essence container ul
606
    mxf_write_local_tag(pb, 16, 0x3004);
607
    put_buffer(pb, multiple_desc_ul, 16);
608

    
609
    // write sub descriptor refs
610
    mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x3F01);
611
    mxf_write_refs_count(pb, s->nb_streams);
612
    for (i = 0; i < s->nb_streams; i++)
613
        mxf_write_uuid(pb, SubDescriptor, i);
614
}
615

    
616
static void mxf_write_generic_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
617
{
618
    MXFContext *mxf = s->priv_data;
619
    MXFStreamContext *sc = st->priv_data;
620
    ByteIOContext *pb = s->pb;
621

    
622
    put_buffer(pb, key, 16);
623
    klv_encode_ber_length(pb, size);
624

    
625
    mxf_write_local_tag(pb, 16, 0x3C0A);
626
    mxf_write_uuid(pb, SubDescriptor, st->index);
627

    
628
    mxf_write_local_tag(pb, 4, 0x3006);
629
    put_be32(pb, st->index);
630

    
631
    mxf_write_local_tag(pb, 8, 0x3001);
632
    put_be32(pb, mxf->time_base.den);
633
    put_be32(pb, mxf->time_base.num);
634

    
635
    mxf_write_local_tag(pb, 16, 0x3004);
636
    put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
637
}
638

    
639
static const UID mxf_mpegvideo_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 };
640
static const UID mxf_wav_descriptor_key       = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 };
641
static const UID mxf_aes3_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 };
642

    
643
static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
644
{
645
    MXFStreamContext *sc = st->priv_data;
646
    ByteIOContext *pb = s->pb;
647
    int stored_height = (st->codec->height+15)/16*16;
648
    AVRational dar;
649
    int f1, f2;
650

    
651
    mxf_write_generic_desc(s, st, mxf_mpegvideo_descriptor_key, 153+sc->interlaced*4);
652

    
653
    mxf_write_local_tag(pb, 4, 0x3203);
654
    put_be32(pb, st->codec->width);
655

    
656
    mxf_write_local_tag(pb, 4, 0x3202);
657
    put_be32(pb, stored_height>>sc->interlaced);
658

    
659
    mxf_write_local_tag(pb, 4, 0x3209);
660
    put_be32(pb, st->codec->width);
661

    
662
    mxf_write_local_tag(pb, 4, 0x3208);
663
    put_be32(pb, st->codec->height>>sc->interlaced);
664

    
665
    // bit rate
666
    mxf_write_local_tag(pb, 4, 0x8000);
667
    put_be32(pb, st->codec->bit_rate);
668

    
669
    // frame layout
670
    mxf_write_local_tag(pb, 1, 0x320C);
671
    put_byte(pb, sc->interlaced);
672

    
673
    // video line map
674
    switch (st->codec->height) {
675
    case  576: f1 = 23; f2 = 336; break;
676
    case  608: f1 =  7; f2 = 320; break;
677
    case  480: f1 = 20; f2 = 283; break;
678
    case  512: f1 =  7; f2 = 270; break;
679
    case  720: f1 = 26; f2 =   0; break; // progressive
680
    case 1080: f1 = 21; f2 = 584; break;
681
    default:   f1 =  0; f2 =   0; break;
682
    }
683

    
684
    if (!sc->interlaced) {
685
        f2  = 0;
686
        f1 *= 2;
687
    }
688

    
689
    mxf_write_local_tag(pb, 12+sc->interlaced*4, 0x320D);
690
    put_be32(pb, sc->interlaced ? 2 : 1);
691
    put_be32(pb, 4);
692
    put_be32(pb, f1);
693
    if (sc->interlaced)
694
        put_be32(pb, f2);
695

    
696
    av_reduce(&dar.num, &dar.den,
697
              st->codec->width*st->codec->sample_aspect_ratio.num,
698
              st->codec->height*st->codec->sample_aspect_ratio.den,
699
              1024*1024);
700

    
701
    mxf_write_local_tag(pb, 8, 0x320E);
702
    put_be32(pb, dar.num);
703
    put_be32(pb, dar.den);
704

    
705
    mxf_write_local_tag(pb, 16, 0x3201);
706
    put_buffer(pb, *sc->codec_ul, 16);
707
}
708

    
709
static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
710
{
711
    ByteIOContext *pb = s->pb;
712

    
713
    mxf_write_generic_desc(s, st, key, size);
714

    
715
    // audio locked
716
    mxf_write_local_tag(pb, 1, 0x3D02);
717
    put_byte(pb, 1);
718

    
719
    // write audio sampling rate
720
    mxf_write_local_tag(pb, 8, 0x3D03);
721
    put_be32(pb, st->codec->sample_rate);
722
    put_be32(pb, 1);
723

    
724
    mxf_write_local_tag(pb, 4, 0x3D07);
725
    put_be32(pb, st->codec->channels);
726

    
727
    mxf_write_local_tag(pb, 4, 0x3D01);
728
    put_be32(pb, av_get_bits_per_sample(st->codec->codec_id));
729
}
730

    
731
static void mxf_write_wav_common_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
732
{
733
    ByteIOContext *pb = s->pb;
734

    
735
    mxf_write_generic_sound_desc(s, st, key, size);
736

    
737
    mxf_write_local_tag(pb, 2, 0x3D0A);
738
    put_be16(pb, st->codec->block_align);
739

    
740
    // avg bytes per sec
741
    mxf_write_local_tag(pb, 4, 0x3D09);
742
    put_be32(pb, st->codec->block_align*st->codec->sample_rate);
743
}
744

    
745
static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)
746
{
747
    mxf_write_wav_common_desc(s, st, mxf_wav_descriptor_key, 107);
748
}
749

    
750
static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)
751
{
752
    mxf_write_wav_common_desc(s, st, mxf_aes3_descriptor_key, 107);
753
}
754

    
755
static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)
756
{
757
    MXFContext *mxf = s->priv_data;
758
    ByteIOContext *pb = s->pb;
759
    int i;
760

    
761
    if (type == MaterialPackage) {
762
        mxf_write_metadata_key(pb, 0x013600);
763
        PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);
764
        klv_encode_ber_length(pb, 92 + 16 * s->nb_streams);
765
    } else {
766
        mxf_write_metadata_key(pb, 0x013700);
767
        PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);
768
        klv_encode_ber_length(pb, 112 + 16 * s->nb_streams); // 20 bytes length for descriptor reference
769
    }
770

    
771
    // write uid
772
    mxf_write_local_tag(pb, 16, 0x3C0A);
773
    mxf_write_uuid(pb, type, 0);
774
    av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);
775
    PRINT_KEY(s, "package uid", pb->buf_ptr - 16);
776

    
777
    // write package umid
778
    mxf_write_local_tag(pb, 32, 0x4401);
779
    mxf_write_umid(pb, type, 0);
780
    PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);
781

    
782
    // package creation date
783
    mxf_write_local_tag(pb, 8, 0x4405);
784
    put_be64(pb, mxf->timestamp);
785

    
786
    // package modified date
787
    mxf_write_local_tag(pb, 8, 0x4404);
788
    put_be64(pb, mxf->timestamp);
789

    
790
    // write track refs
791
    mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x4403);
792
    mxf_write_refs_count(pb, s->nb_streams);
793
    for (i = 0; i < s->nb_streams; i++)
794
        mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);
795

    
796
    // write multiple descriptor reference
797
    if (type == SourcePackage) {
798
        mxf_write_local_tag(pb, 16, 0x4701);
799
        if (s->nb_streams > 1) {
800
            mxf_write_uuid(pb, MultipleDescriptor, 0);
801
            mxf_write_multi_descriptor(s);
802
        } else
803
            mxf_write_uuid(pb, SubDescriptor, 0);
804
    }
805

    
806
    for (i = 0; i < s->nb_streams; i++) {
807
        AVStream *st = s->streams[i];
808
        mxf_write_track(s, st, type);
809
        mxf_write_sequence(s, st, type);
810
        mxf_write_structural_component(s, st, type);
811

    
812
        if (type == SourcePackage) {
813
            MXFStreamContext *sc = st->priv_data;
814
            mxf_essence_container_uls[sc->index].write_desc(s, st);
815
        }
816
    }
817
}
818

    
819
static int mxf_write_essence_container_data(AVFormatContext *s)
820
{
821
    ByteIOContext *pb = s->pb;
822

    
823
    mxf_write_metadata_key(pb, 0x012300);
824
    klv_encode_ber_length(pb, 72);
825

    
826
    mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID
827
    mxf_write_uuid(pb, EssenceContainerData, 0);
828

    
829
    mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID
830
    mxf_write_umid(pb, SourcePackage, 0);
831

    
832
    mxf_write_local_tag(pb, 4, 0x3F07); // BodySID
833
    put_be32(pb, 1);
834

    
835
    mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID
836
    put_be32(pb, 2);
837

    
838
    return 0;
839
}
840

    
841
static int mxf_write_header_metadata_sets(AVFormatContext *s)
842
{
843
    mxf_write_preface(s);
844
    mxf_write_identification(s);
845
    mxf_write_content_storage(s);
846
    mxf_write_package(s, MaterialPackage);
847
    mxf_write_package(s, SourcePackage);
848
    mxf_write_essence_container_data(s);
849
    return 0;
850
}
851

    
852
static unsigned klv_fill_size(uint64_t size)
853
{
854
    unsigned pad = KAG_SIZE - (size & (KAG_SIZE-1));
855
    if (pad < 17) // smallest fill item possible
856
        return pad + KAG_SIZE;
857
    else
858
        return pad & (KAG_SIZE-1);
859
}
860

    
861
static void mxf_write_index_table_segment(AVFormatContext *s)
862
{
863
    MXFContext *mxf = s->priv_data;
864
    ByteIOContext *pb = s->pb;
865
    int i, j;
866
    int temporal_reordering = 0;
867
    int last_key_index = 0, key_index = 0;
868

    
869
    av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);
870

    
871
    put_buffer(pb, index_table_segment_key, 16);
872
    klv_encode_ber_length(pb, 109 + (s->nb_streams+1)*6 +
873
                          mxf->edit_units_count*(11+mxf->slice_count*4));
874

    
875
    // instance id
876
    mxf_write_local_tag(pb, 16, 0x3C0A);
877
    mxf_write_uuid(pb, IndexTableSegment, 0);
878

    
879
    // index edit rate
880
    mxf_write_local_tag(pb, 8, 0x3F0B);
881
    put_be32(pb, mxf->time_base.num);
882
    put_be32(pb, mxf->time_base.den);
883

    
884
    // index start position
885
    mxf_write_local_tag(pb, 8, 0x3F0C);
886
    put_be64(pb, 0);
887

    
888
    // index duration
889
    mxf_write_local_tag(pb, 8, 0x3F0D);
890
    put_be64(pb, mxf->edit_units_count);
891

    
892
    // edit unit byte count
893
    mxf_write_local_tag(pb, 4, 0x3F05);
894
    put_be32(pb, 0);
895

    
896
    // index sid
897
    mxf_write_local_tag(pb, 4, 0x3F06);
898
    put_be32(pb, 2);
899

    
900
    // body sid
901
    mxf_write_local_tag(pb, 4, 0x3F07);
902
    put_be32(pb, 1);
903

    
904
    // real slice count - 1
905
    mxf_write_local_tag(pb, 1, 0x3F08);
906
    put_byte(pb, mxf->slice_count);
907

    
908
    // delta entry array
909
    mxf_write_local_tag(pb, 8 + (s->nb_streams+1)*6, 0x3F09);
910
    put_be32(pb, s->nb_streams+1); // num of entries
911
    put_be32(pb, 6);             // size of one entry
912
    // write system item delta entry
913
    put_byte(pb, 0);
914
    put_byte(pb, 0); // slice entry
915
    put_be32(pb, 0); // element delta
916
    for (i = 0; i < s->nb_streams; i++) {
917
        AVStream *st = s->streams[i];
918
        MXFStreamContext *sc = st->priv_data;
919
        put_byte(pb, sc->temporal_reordering);
920
        if (sc->temporal_reordering)
921
            temporal_reordering = 1;
922
        // slice number
923
        if (i == 0) { // video track
924
            put_byte(pb, 0); // slice number
925
            put_be32(pb, KAG_SIZE); // system item size including klv fill
926
        } else { // audio track
927
            unsigned audio_frame_size = sc->aic.samples[0]*sc->aic.sample_size;
928
            audio_frame_size += klv_fill_size(audio_frame_size);
929
            put_byte(pb, 1);
930
            put_be32(pb, (i-1)*audio_frame_size); // element delta
931
        }
932
    }
933

    
934
    mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+mxf->slice_count*4), 0x3F0A);
935
    put_be32(pb, mxf->edit_units_count);  // num of entries
936
    put_be32(pb, 11+mxf->slice_count*4);  // size of one entry
937
    for (i = 0; i < mxf->edit_units_count; i++) {
938
        if (temporal_reordering) {
939
            int temporal_offset = 0;
940
            for (j = i+1; j < mxf->edit_units_count; j++) {
941
                temporal_offset++;
942
                if (mxf->index_entries[j].flags & 0x10) { // backward prediction
943
                    // next is not b, so is reordered
944
                    if (!(mxf->index_entries[i+1].flags & 0x10)) {
945
                        if ((mxf->index_entries[i].flags & 0x11) == 0) // i frame
946
                            temporal_offset = 0;
947
                        else
948
                            temporal_offset = -temporal_offset;
949
                    }
950
                    break;
951
                }
952
            }
953
            put_byte(pb, temporal_offset);
954
        } else
955
            put_byte(pb, 0);
956
        if (!(mxf->index_entries[i].flags & 0x33)) { // I frame
957
            last_key_index = key_index;
958
            key_index = i;
959
        }
960
        if (mxf->index_entries[i].flags & 0x10 && // backward prediction
961
            !(mxf->index_entries[key_index].flags & 0x80)) { // open gop
962
            put_byte(pb, last_key_index - i);
963
        } else {
964
            put_byte(pb, key_index - i); // key frame offset
965
            if ((mxf->index_entries[i].flags & 0x20) == 0x20) // only forward
966
                last_key_index = key_index;
967
        }
968
        put_byte(pb, mxf->index_entries[i].flags);
969
        // stream offset
970
        put_be64(pb, mxf->index_entries[i].offset - mxf->index_entries[0].offset);
971
        if (s->nb_streams > 1)
972
            put_be32(pb, mxf->index_entries[i].slice_offset);
973
    }
974
}
975

    
976
static void mxf_write_partition(AVFormatContext *s, int bodysid,
977
                                int indexsid, unsigned index_byte_count,
978
                                const uint8_t *key, int write_metadata)
979
{
980
    MXFContext *mxf = s->priv_data;
981
    ByteIOContext *pb = s->pb;
982
    int64_t header_byte_count_offset;
983

    
984
    // write klv
985
    put_buffer(pb, key, 16);
986

    
987
    klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);
988

    
989
    // write partition value
990
    put_be16(pb, 1); // majorVersion
991
    put_be16(pb, 2); // minorVersion
992
    put_be32(pb, KAG_SIZE); // KAGSize
993

    
994
    put_be64(pb, url_ftell(pb) - 25); // thisPartition
995
    put_be64(pb, 0); // previousPartition
996

    
997
    put_be64(pb, mxf->footer_partition_offset); // footerPartition
998

    
999
    // set offset
1000
    header_byte_count_offset = url_ftell(pb);
1001
    put_be64(pb, 0); // headerByteCount, update later
1002

    
1003
    // indexTable
1004
    put_be64(pb, index_byte_count); // indexByteCount
1005
    put_be32(pb, indexsid); // indexSID
1006
    put_be64(pb, 0); // bodyOffset
1007

    
1008
    put_be32(pb, bodysid); // bodySID
1009

    
1010
    // operational pattern
1011
    if (s->nb_streams > 1) {
1012
        put_buffer(pb, op1a_ul, 14);
1013
        put_be16(pb, 0x0900); // multi track
1014
    } else {
1015
        put_buffer(pb, op1a_ul, 16);
1016
    }
1017

    
1018
    // essence container
1019
    mxf_write_essence_container_refs(s);
1020

    
1021
    if (write_metadata) {
1022
        // mark the start of the headermetadata and calculate metadata size
1023
        int64_t pos, start = url_ftell(s->pb);
1024
        unsigned header_byte_count;
1025

    
1026
        mxf_write_primer_pack(s);
1027
        mxf_write_header_metadata_sets(s);
1028
        pos = url_ftell(s->pb);
1029
        header_byte_count = pos - start + klv_fill_size(pos);
1030

    
1031
        // update header_byte_count
1032
        url_fseek(pb, header_byte_count_offset, SEEK_SET);
1033
        put_be64(pb, header_byte_count);
1034
        url_fseek(pb, pos, SEEK_SET);
1035
    }
1036

    
1037
    put_flush_packet(pb);
1038
}
1039

    
1040
static const UID mxf_mpeg2_codec_uls[] = {
1041
    { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame
1042
    { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP
1043
    { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame
1044
    { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP
1045
    { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame
1046
    { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP
1047
    { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame
1048
    { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP
1049
};
1050

    
1051
static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)
1052
{
1053
    if (avctx->profile == 4) { // Main
1054
        if (avctx->level == 8) // Main
1055
            return avctx->gop_size ?
1056
                &mxf_mpeg2_codec_uls[1] :
1057
                &mxf_mpeg2_codec_uls[0];
1058
        else if (avctx->level == 4) // High
1059
            return avctx->gop_size ?
1060
                &mxf_mpeg2_codec_uls[5] :
1061
                &mxf_mpeg2_codec_uls[4];
1062
    } else if (avctx->profile == 0) { // 422
1063
        if (avctx->level == 5) // Main
1064
            return avctx->gop_size ?
1065
                &mxf_mpeg2_codec_uls[3] :
1066
                &mxf_mpeg2_codec_uls[2];
1067
        else if (avctx->level == 2) // High
1068
            return avctx->gop_size ?
1069
                &mxf_mpeg2_codec_uls[7] :
1070
                &mxf_mpeg2_codec_uls[6];
1071
    }
1072
    return NULL;
1073
}
1074

    
1075
static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)
1076
{
1077
    MXFContext *mxf = s->priv_data;
1078
    MXFStreamContext *sc = st->priv_data;
1079
    uint32_t c = -1;
1080
    int i;
1081

    
1082
    mxf->index_entries[mxf->edit_units_count].flags = 0;
1083

    
1084
    for(i = 0; i < pkt->size - 4; i++) {
1085
        c = (c<<8) + pkt->data[i];
1086
        if (c == 0x1B5) {
1087
            if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
1088
                st->codec->profile = pkt->data[i+1] & 0x07;
1089
                st->codec->level   = pkt->data[i+2] >> 4;
1090
            } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext
1091
                sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame
1092
                break;
1093
            }
1094
        } else if (c == 0x1b8) { // gop
1095
            if (i + 4 < pkt->size && pkt->data[i+4]>>6 & 0x01) // closed
1096
                mxf->index_entries[mxf->edit_units_count].flags |= 0x80; // random access
1097
        } else if (c == 0x1b3) { // seq
1098
            mxf->index_entries[mxf->edit_units_count].flags |= 0x40;
1099
        } else if (c == 0x100) { // pic
1100
            int pict_type = (pkt->data[i+2]>>3) & 0x07;
1101
            if (pict_type == 2) { // P frame
1102
                mxf->index_entries[mxf->edit_units_count].flags |= 0x22;
1103
                st->codec->gop_size = 1;
1104
            } else if (pict_type == 3) { // B frame
1105
                mxf->index_entries[mxf->edit_units_count].flags |= 0x33;
1106
                sc->temporal_reordering = -1;
1107
            } else if (!pict_type) {
1108
                av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");
1109
                return 0;
1110
            }
1111
        }
1112
    }
1113
    sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);
1114
    return !!sc->codec_ul;
1115
}
1116

    
1117
static uint64_t mxf_parse_timestamp(time_t timestamp)
1118
{
1119
    struct tm *time = localtime(&timestamp);
1120
    return (uint64_t)(time->tm_year+1900) << 48 |
1121
           (uint64_t)(time->tm_mon+1)     << 40 |
1122
           (uint64_t) time->tm_mday       << 32 |
1123
                      time->tm_hour       << 24 |
1124
                      time->tm_min        << 16 |
1125
                      time->tm_sec        << 8;
1126
}
1127

    
1128
static int mxf_write_header(AVFormatContext *s)
1129
{
1130
    MXFContext *mxf = s->priv_data;
1131
    int i;
1132
    uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};
1133
    const int *samples_per_frame = NULL;
1134

    
1135
    if (s->nb_streams > 17) {
1136
        av_log(s, AV_LOG_ERROR, "error, mxf muxer supports 17 tracks maximum\n");
1137
        return -1;
1138
    }
1139

    
1140
    for (i = 0; i < s->nb_streams; i++) {
1141
        AVStream *st = s->streams[i];
1142
        MXFStreamContext *sc = av_mallocz(sizeof(*sc));
1143
        if (!sc)
1144
            return AVERROR(ENOMEM);
1145
        st->priv_data = sc;
1146

    
1147
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
1148
            if (i != 0) {
1149
                av_log(s, AV_LOG_ERROR, "video stream must be first track\n");
1150
                return -1;
1151
            }
1152
            if (fabs(av_q2d(st->codec->time_base) - 1/25.0) < 0.0001) {
1153
                samples_per_frame = PAL_samples_per_frame;
1154
                mxf->time_base = (AVRational){ 1, 25 };
1155
            } else if (fabs(av_q2d(st->codec->time_base) - 1001/30000.0) < 0.0001) {
1156
                samples_per_frame = NTSC_samples_per_frame;
1157
                mxf->time_base = (AVRational){ 1001, 30000 };
1158
            } else {
1159
                av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");
1160
                return -1;
1161
            }
1162
            av_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);
1163
        } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1164
            if (st->codec->sample_rate != 48000) {
1165
                av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");
1166
                return -1;
1167
            }
1168
            av_set_pts_info(st, 64, 1, st->codec->sample_rate);
1169
            mxf->slice_count = 1;
1170
        }
1171
        sc->duration = -1;
1172

    
1173
        sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);
1174
        if (sc->index == -1) {
1175
            av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "
1176
                   "codec not currently supported in container\n", i);
1177
            return -1;
1178
        }
1179

    
1180
        sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;
1181

    
1182
        if (!present[sc->index]) {
1183
            mxf->essence_containers_indices[mxf->essence_container_count++] = sc->index;
1184
            present[sc->index] = 1;
1185
        } else
1186
            present[sc->index]++;
1187
        memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);
1188
        sc->track_essence_element_key[15] = present[sc->index];
1189
        PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);
1190
    }
1191

    
1192
    for (i = 0; i < s->nb_streams; i++) {
1193
        MXFStreamContext *sc = s->streams[i]->priv_data;
1194
        // update element count
1195
        sc->track_essence_element_key[13] = present[sc->index];
1196
        sc->order = AV_RB32(sc->track_essence_element_key+12);
1197
    }
1198

    
1199
    mxf->timestamp = mxf_parse_timestamp(s->timestamp);
1200

    
1201
    if (!samples_per_frame)
1202
        samples_per_frame = PAL_samples_per_frame;
1203

    
1204
    if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)
1205
        return -1;
1206

    
1207
    return 0;
1208
}
1209

    
1210
static void mxf_write_klv_fill(AVFormatContext *s)
1211
{
1212
    unsigned pad = klv_fill_size(url_ftell(s->pb));
1213
    if (pad) {
1214
        put_buffer(s->pb, klv_fill_key, 16);
1215
        pad -= 16;
1216
        pad -= klv_ber_length(pad);
1217
        klv_encode_ber_length(s->pb, pad);
1218
        for (; pad > 7; pad -= 8)
1219
            put_be64(s->pb, 0);
1220
        for (; pad; pad--)
1221
            put_byte(s->pb, 0);
1222
        assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));
1223
    }
1224
}
1225

    
1226
static const uint8_t system_metadata_pack_key[]        = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x01,0x00 };
1227
static const uint8_t system_metadata_package_set_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x43,0x01,0x01,0x0D,0x01,0x03,0x01,0x04,0x01,0x02,0x01 };
1228

    
1229
static uint32_t ff_framenum_to_12m_time_code(unsigned frame, int drop, int fps)
1230
{
1231
    return (0                                    << 31) | // color frame flag
1232
           (0                                    << 30) | // drop  frame flag
1233
           ( ((frame % fps) / 10)                << 28) | // tens  of frames
1234
           ( ((frame % fps) % 10)                << 24) | // units of frames
1235
           (0                                    << 23) | // field phase (NTSC), b0 (PAL)
1236
           ((((frame / fps) % 60) / 10)          << 20) | // tens  of seconds
1237
           ((((frame / fps) % 60) % 10)          << 16) | // units of seconds
1238
           (0                                    << 15) | // b0 (NTSC), b2 (PAL)
1239
           ((((frame / (fps * 60)) % 60) / 10)   << 12) | // tens  of minutes
1240
           ((((frame / (fps * 60)) % 60) % 10)   <<  8) | // units of minutes
1241
           (0                                    <<  7) | // b1
1242
           (0                                    <<  6) | // b2 (NSC), field phase (PAL)
1243
           ((((frame / (fps * 3600) % 24)) / 10) <<  4) | // tens  of hours
1244
           (  (frame / (fps * 3600) % 24)) % 10;          // units of hours
1245
}
1246

    
1247
static void mxf_write_system_item(AVFormatContext *s)
1248
{
1249
    MXFContext *mxf = s->priv_data;
1250
    ByteIOContext *pb = s->pb;
1251
    unsigned fps, frame;
1252
    uint32_t time_code;
1253

    
1254
    frame = mxf->edit_units_count;
1255

    
1256
    // write system metadata pack
1257
    put_buffer(pb, system_metadata_pack_key, 16);
1258
    klv_encode_ber_length(pb, 57);
1259
    put_byte(pb, 0x5c); // UL, user date/time stamp, picture and sound item present
1260
    put_byte(pb, 0x04); // content package rate
1261
    put_byte(pb, 0x00); // content package type
1262
    put_be16(pb, 0x00); // channel handle
1263
    put_be16(pb, frame); // continuity count
1264
    if (mxf->essence_container_count > 1)
1265
        put_buffer(pb, multiple_desc_ul, 16);
1266
    else
1267
        put_buffer(pb, mxf_essence_container_uls[mxf->essence_containers_indices[0]].container_ul, 16);
1268
    put_byte(pb, 0);
1269
    put_be64(pb, 0);
1270
    put_be64(pb, 0); // creation date/time stamp
1271

    
1272
    // XXX drop frame
1273
    if (mxf->time_base.den == 30000) fps = 30;
1274
    else                             fps = 25;
1275

    
1276
    put_byte(pb, 0x81); // SMPTE 12M time code
1277
    time_code = ff_framenum_to_12m_time_code(frame, 0, fps);
1278
    put_be32(pb, time_code);
1279
    put_be32(pb, 0); // binary group data
1280
    put_be64(pb, 0);
1281

    
1282
    // write system metadata package set
1283
    put_buffer(pb, system_metadata_package_set_key, 16);
1284
    klv_encode_ber_length(pb, 35);
1285
    put_byte(pb, 0x83); // UMID
1286
    put_be16(pb, 0x20);
1287
    mxf_write_umid(pb, SourcePackage, 0);
1288
}
1289

    
1290
static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
1291
{
1292
    MXFContext *mxf = s->priv_data;
1293
    ByteIOContext *pb = s->pb;
1294
    AVStream *st = s->streams[pkt->stream_index];
1295
    MXFStreamContext *sc = st->priv_data;
1296

    
1297
    if (!(mxf->edit_units_count % MXF_INDEX_CLUSTER_SIZE)) {
1298
        mxf->index_entries = av_realloc(mxf->index_entries,
1299
            (mxf->edit_units_count + MXF_INDEX_CLUSTER_SIZE)*
1300
             sizeof(*mxf->index_entries));
1301
        if (!mxf->index_entries) {
1302
            av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");
1303
            return -1;
1304
        }
1305
    }
1306

    
1307
    if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
1308
        if (!mxf_parse_mpeg2_frame(s, st, pkt)) {
1309
            av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
1310
            return -1;
1311
        }
1312
    }
1313

    
1314
    if (!mxf->header_written) {
1315
        mxf_write_partition(s, 1, 0, 0, header_open_partition_key, 1);
1316
        mxf->header_written = 1;
1317
    }
1318

    
1319
    mxf_write_klv_fill(s);
1320

    
1321
    if (st->index == 0) {
1322
        mxf->index_entries[mxf->edit_units_count].offset = url_ftell(pb);
1323

    
1324
        mxf_write_system_item(s);
1325
        mxf_write_klv_fill(s);
1326

    
1327
        mxf->edit_units_count++;
1328
    } else if (st->index == 1) {
1329
        mxf->index_entries[mxf->edit_units_count-1].slice_offset =
1330
            url_ftell(pb) - mxf->index_entries[mxf->edit_units_count-1].offset;
1331
    }
1332

    
1333
    put_buffer(pb, sc->track_essence_element_key, 16); // write key
1334
    klv_encode_ber_length(pb, pkt->size); // write length
1335
    put_buffer(pb, pkt->data, pkt->size); // write value
1336

    
1337
    sc->duration = FFMAX(pkt->pts + pkt->duration, sc->duration);
1338

    
1339
    put_flush_packet(pb);
1340
    return 0;
1341
}
1342

    
1343
static void mxf_write_random_index_pack(AVFormatContext *s)
1344
{
1345
    MXFContext *mxf = s->priv_data;
1346
    ByteIOContext *pb = s->pb;
1347
    uint64_t pos = url_ftell(pb);
1348

    
1349
    put_buffer(pb, random_index_pack_key, 16);
1350
    klv_encode_ber_length(pb, 28);
1351

    
1352
    put_be32(pb, 1); // BodySID of header partition
1353
    put_be64(pb, 0); // offset of header partition
1354

    
1355
    put_be32(pb, 0); // BodySID of footer partition
1356
    put_be64(pb, mxf->footer_partition_offset);
1357

    
1358
    put_be32(pb, url_ftell(pb) - pos + 4);
1359
}
1360

    
1361
static int mxf_write_footer(AVFormatContext *s)
1362
{
1363
    MXFContext *mxf = s->priv_data;
1364
    ByteIOContext *pb = s->pb;
1365
    unsigned index_byte_count =
1366
        109 + (s->nb_streams+1)*6 +
1367
        mxf->edit_units_count*(11+mxf->slice_count*4);
1368

    
1369
    // add encoded ber length
1370
    index_byte_count += 16 + klv_ber_length(index_byte_count);
1371

    
1372
    mxf_write_klv_fill(s);
1373

    
1374
    mxf->footer_partition_offset = url_ftell(pb);
1375
    mxf_write_partition(s, 0, 2, index_byte_count, footer_partition_key, 0);
1376

    
1377
    mxf_write_index_table_segment(s);
1378

    
1379
    mxf_write_random_index_pack(s);
1380

    
1381
    if (!url_is_streamed(s->pb)) {
1382
        url_fseek(pb, 0, SEEK_SET);
1383
        mxf_write_partition(s, 1, 0, 0, header_closed_partition_key, 1);
1384
    }
1385

    
1386
    ff_audio_interleave_close(s);
1387

    
1388
    av_freep(&mxf->index_entries);
1389

    
1390
    mxf_free(s);
1391
    return 0;
1392
}
1393

    
1394
static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1395
{
1396
    AVPacketList *pktl;
1397
    int stream_count = 0;
1398
    int streams[MAX_STREAMS];
1399

    
1400
    memset(streams, 0, sizeof(streams));
1401
    pktl = s->packet_buffer;
1402
    while (pktl) {
1403
        //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);
1404
        if (!streams[pktl->pkt.stream_index])
1405
            stream_count++;
1406
        streams[pktl->pkt.stream_index]++;
1407
        pktl = pktl->next;
1408
    }
1409

    
1410
    if (stream_count && (s->nb_streams == stream_count || flush)) {
1411
        pktl = s->packet_buffer;
1412
        if (s->nb_streams != stream_count) {
1413
            AVPacketList *first = NULL;
1414
            // find first packet in edit unit
1415
            while (pktl) {
1416
                AVStream *st = s->streams[pktl->pkt.stream_index];
1417
                if (st->index == 0)
1418
                    break;
1419
                else if (!first)
1420
                    first = pktl;
1421
                pktl = pktl->next;
1422
            }
1423
            // purge packet queue
1424
            while (pktl) {
1425
                AVPacketList *next = pktl->next;
1426
                av_free_packet(&pktl->pkt);
1427
                av_freep(&pktl);
1428
                pktl = next;
1429
            }
1430
            if (!first)
1431
                goto out;
1432
            pktl = first;
1433
        }
1434

    
1435
        *out = pktl->pkt;
1436
        //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);
1437
        s->packet_buffer = pktl->next;
1438
        av_freep(&pktl);
1439
        return 1;
1440
    } else {
1441
    out:
1442
        av_init_packet(out);
1443
        return 0;
1444
    }
1445
}
1446

    
1447
static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
1448
{
1449
    MXFStreamContext *sc  = s->streams[pkt ->stream_index]->priv_data;
1450
    MXFStreamContext *sc2 = s->streams[next->stream_index]->priv_data;
1451

    
1452
    return next->dts > pkt->dts ||
1453
        (next->dts == pkt->dts && sc->order < sc2->order);
1454
}
1455

    
1456
static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1457
{
1458
    return ff_audio_rechunk_interleave(s, out, pkt, flush,
1459
                               mxf_interleave_get_packet, mxf_compare_timestamps);
1460
}
1461

    
1462
AVOutputFormat mxf_muxer = {
1463
    "mxf",
1464
    NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1465
    NULL,
1466
    "mxf",
1467
    sizeof(MXFContext),
1468
    CODEC_ID_PCM_S16LE,
1469
    CODEC_ID_MPEG2VIDEO,
1470
    mxf_write_header,
1471
    mxf_write_packet,
1472
    mxf_write_footer,
1473
    AVFMT_NOTIMESTAMPS,
1474
    NULL,
1475
    mxf_interleave,
1476
};