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mxfdec.c
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/*
* MXF demuxer.
* Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* References
* SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
* SMPTE 377M MXF File Format Specifications
* SMPTE 378M Operational Pattern 1a
* SMPTE 379M MXF Generic Container
* SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
* SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
* SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
* SMPTE 2067-21 Interoperable Master Format — Application #2E
*
* Principle
* Search for Track numbers which will identify essence element KLV packets.
* Search for SourcePackage which define tracks which contains Track numbers.
* Material Package contains tracks with reference to SourcePackage tracks.
* Search for Descriptors (Picture, Sound) which contains codec info and parameters.
* Assign Descriptors to correct Tracks.
*
* Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
* Metadata parsing resolves Strong References to objects.
*
* Simple demuxer, only OP1A supported and some files might not work at all.
* Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
*/
#include <inttypes.h>
#include "libavutil/aes.h"
#include "libavutil/avstring.h"
#include "libavutil/mastering_display_metadata.h"
#include "libavutil/mathematics.h"
#include "libavcodec/bytestream.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/parseutils.h"
#include "libavutil/timecode.h"
#include "libavutil/opt.h"
#include "avformat.h"
#include "internal.h"
#include "mxf.h"
#define MXF_MAX_CHUNK_SIZE (32 << 20)
typedef enum {
Header,
BodyPartition,
Footer
} MXFPartitionType;
typedef enum {
OP1a = 1,
OP1b,
OP1c,
OP2a,
OP2b,
OP2c,
OP3a,
OP3b,
OP3c,
OPAtom,
OPSONYOpt, /* FATE sample, violates the spec in places */
} MXFOP;
typedef enum {
UnknownWrapped = 0,
FrameWrapped,
ClipWrapped,
} MXFWrappingScheme;
typedef struct MXFPartition {
int closed;
int complete;
MXFPartitionType type;
uint64_t previous_partition;
int index_sid;
int body_sid;
int64_t this_partition;
int64_t essence_offset; ///< absolute offset of essence
int64_t essence_length;
int32_t kag_size;
int64_t header_byte_count;
int64_t index_byte_count;
int pack_length;
int64_t pack_ofs; ///< absolute offset of pack in file, including run-in
int64_t body_offset;
KLVPacket first_essence_klv;
} MXFPartition;
typedef struct MXFMetadataSet {
UID uid;
uint64_t partition_score;
enum MXFMetadataSetType type;
} MXFMetadataSet;
typedef struct MXFCryptoContext {
MXFMetadataSet meta;
UID source_container_ul;
} MXFCryptoContext;
typedef struct MXFStructuralComponent {
MXFMetadataSet meta;
UID source_package_ul;
UID source_package_uid;
UID data_definition_ul;
int64_t duration;
int64_t start_position;
int source_track_id;
} MXFStructuralComponent;
typedef struct MXFSequence {
MXFMetadataSet meta;
UID data_definition_ul;
UID *structural_components_refs;
int structural_components_count;
int64_t duration;
uint8_t origin;
} MXFSequence;
typedef struct MXFTimecodeComponent {
MXFMetadataSet meta;
int drop_frame;
int start_frame;
struct AVRational rate;
AVTimecode tc;
} MXFTimecodeComponent;
typedef struct {
MXFMetadataSet meta;
UID input_segment_ref;
} MXFPulldownComponent;
typedef struct {
MXFMetadataSet meta;
UID *structural_components_refs;
int structural_components_count;
int64_t duration;
} MXFEssenceGroup;
typedef struct {
MXFMetadataSet meta;
char *name;
char *value;
} MXFTaggedValue;
typedef struct {
MXFMetadataSet meta;
MXFSequence *sequence; /* mandatory, and only one */
UID sequence_ref;
int track_id;
char *name;
uint8_t track_number[4];
AVRational edit_rate;
int intra_only;
uint64_t sample_count;
int64_t original_duration; /* st->duration in SampleRate/EditRate units */
int index_sid;
int body_sid;
MXFWrappingScheme wrapping;
int edit_units_per_packet; /* how many edit units to read at a time (PCM, ClipWrapped) */
} MXFTrack;
typedef struct MXFDescriptor {
MXFMetadataSet meta;
UID essence_container_ul;
UID essence_codec_ul;
UID codec_ul;
AVRational sample_rate;
AVRational aspect_ratio;
int width;
int height; /* Field height, not frame height */
int frame_layout; /* See MXFFrameLayout enum */
int video_line_map[2];
#define MXF_FIELD_DOMINANCE_DEFAULT 0
#define MXF_FIELD_DOMINANCE_FF 1 /* coded first, displayed first */
#define MXF_FIELD_DOMINANCE_FL 2 /* coded first, displayed last */
int field_dominance;
int channels;
int bits_per_sample;
int64_t duration; /* ContainerDuration optional property */
unsigned int component_depth;
unsigned int black_ref_level;
unsigned int white_ref_level;
unsigned int color_range;
unsigned int horiz_subsampling;
unsigned int vert_subsampling;
UID *file_descriptors_refs;
int file_descriptors_count;
int linked_track_id;
uint8_t *extradata;
int extradata_size;
enum AVPixelFormat pix_fmt;
UID color_primaries_ul;
UID color_trc_ul;
UID color_space_ul;
AVMasteringDisplayMetadata *mastering;
AVContentLightMetadata *coll;
size_t coll_size;
} MXFDescriptor;
typedef struct MXFIndexTableSegment {
MXFMetadataSet meta;
int edit_unit_byte_count;
int index_sid;
int body_sid;
AVRational index_edit_rate;
uint64_t index_start_position;
uint64_t index_duration;
int8_t *temporal_offset_entries;
int *flag_entries;
uint64_t *stream_offset_entries;
int nb_index_entries;
} MXFIndexTableSegment;
typedef struct MXFPackage {
MXFMetadataSet meta;
UID package_uid;
UID package_ul;
UID *tracks_refs;
int tracks_count;
MXFDescriptor *descriptor; /* only one */
UID descriptor_ref;
char *name;
UID *comment_refs;
int comment_count;
} MXFPackage;
typedef struct MXFEssenceContainerData {
MXFMetadataSet meta;
UID package_uid;
UID package_ul;
int index_sid;
int body_sid;
} MXFEssenceContainerData;
/* decoded index table */
typedef struct MXFIndexTable {
int index_sid;
int body_sid;
int nb_ptses; /* number of PTSes or total duration of index */
int64_t first_dts; /* DTS = EditUnit + first_dts */
int64_t *ptses; /* maps EditUnit -> PTS */
int nb_segments;
MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
int8_t *offsets; /* temporal offsets for display order to stored order conversion */
} MXFIndexTable;
typedef struct MXFContext {
const AVClass *class; /**< Class for private options. */
MXFPartition *partitions;
unsigned partitions_count;
MXFOP op;
UID *packages_refs;
int packages_count;
UID *essence_container_data_refs;
int essence_container_data_count;
MXFMetadataSet **metadata_sets;
int metadata_sets_count;
AVFormatContext *fc;
struct AVAES *aesc;
uint8_t *local_tags;
int local_tags_count;
uint64_t footer_partition;
KLVPacket current_klv_data;
int run_in;
MXFPartition *current_partition;
int parsing_backward;
int64_t last_forward_tell;
int last_forward_partition;
int nb_index_tables;
MXFIndexTable *index_tables;
int eia608_extract;
} MXFContext;
/* NOTE: klv_offset is not set (-1) for local keys */
typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
typedef struct MXFMetadataReadTableEntry {
const UID key;
MXFMetadataReadFunc *read;
int ctx_size;
enum MXFMetadataSetType type;
} MXFMetadataReadTableEntry;
/* partial keys to match */
static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
static const uint8_t mxf_canopus_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x0a,0x0e,0x0f,0x03,0x01 };
static const uint8_t mxf_system_item_key_cp[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x03,0x01,0x04 };
static const uint8_t mxf_system_item_key_gc[] = { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x03,0x01,0x14 };
static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
static const uint8_t mxf_apple_coll_prefix[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0e,0x0e,0x20,0x04,0x01,0x05,0x03,0x01 };
/* complete keys to match */
static const uint8_t mxf_crypto_source_container_ul[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x09,0x06,0x01,0x01,0x02,0x02,0x00,0x00,0x00 };
static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
static const uint8_t mxf_avid_project_name[] = { 0xa5,0xfb,0x7b,0x25,0xf6,0x15,0x94,0xb9,0x62,0xfc,0x37,0x17,0x49,0x2d,0x42,0xbf };
static const uint8_t mxf_jp2k_rsiz[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0a,0x04,0x01,0x06,0x03,0x01,0x00,0x00,0x00 };
static const uint8_t mxf_indirect_value_utf16le[] = { 0x4c,0x00,0x02,0x10,0x01,0x00,0x00,0x00,0x00,0x06,0x0e,0x2b,0x34,0x01,0x04,0x01,0x01 };
static const uint8_t mxf_indirect_value_utf16be[] = { 0x42,0x01,0x10,0x02,0x00,0x00,0x00,0x00,0x00,0x06,0x0e,0x2b,0x34,0x01,0x04,0x01,0x01 };
static const uint8_t mxf_apple_coll_max_cll[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0e,0x0e,0x20,0x04,0x01,0x05,0x03,0x01,0x01 };
static const uint8_t mxf_apple_coll_max_fall[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0e,0x0e,0x20,0x04,0x01,0x05,0x03,0x01,0x02 };
static const uint8_t mxf_mastering_display_prefix[13] = { FF_MXF_MasteringDisplay_PREFIX };
static const uint8_t mxf_mastering_display_uls[4][16] = {
FF_MXF_MasteringDisplayPrimaries,
FF_MXF_MasteringDisplayWhitePointChromaticity,
FF_MXF_MasteringDisplayMaximumLuminance,
FF_MXF_MasteringDisplayMinimumLuminance,
};
#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
static void mxf_free_metadataset(MXFMetadataSet **ctx, int freectx)
{
MXFIndexTableSegment *seg;
switch ((*ctx)->type) {
case Descriptor:
case MultipleDescriptor:
av_freep(&((MXFDescriptor *)*ctx)->extradata);
av_freep(&((MXFDescriptor *)*ctx)->mastering);
av_freep(&((MXFDescriptor *)*ctx)->coll);
av_freep(&((MXFDescriptor *)*ctx)->file_descriptors_refs);
break;
case Sequence:
av_freep(&((MXFSequence *)*ctx)->structural_components_refs);
break;
case EssenceGroup:
av_freep(&((MXFEssenceGroup *)*ctx)->structural_components_refs);
break;
case SourcePackage:
case MaterialPackage:
av_freep(&((MXFPackage *)*ctx)->tracks_refs);
av_freep(&((MXFPackage *)*ctx)->name);
av_freep(&((MXFPackage *)*ctx)->comment_refs);
break;
case TaggedValue:
av_freep(&((MXFTaggedValue *)*ctx)->name);
av_freep(&((MXFTaggedValue *)*ctx)->value);
break;
case Track:
av_freep(&((MXFTrack *)*ctx)->name);
break;
case IndexTableSegment:
seg = (MXFIndexTableSegment *)*ctx;
av_freep(&seg->temporal_offset_entries);
av_freep(&seg->flag_entries);
av_freep(&seg->stream_offset_entries);
default:
break;
}
if (freectx) {
av_freep(ctx);
}
}
static int64_t klv_decode_ber_length(AVIOContext *pb)
{
uint64_t size = avio_r8(pb);
if (size & 0x80) { /* long form */
int bytes_num = size & 0x7f;
/* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
if (bytes_num > 8)
return AVERROR_INVALIDDATA;
size = 0;
while (bytes_num--)
size = size << 8 | avio_r8(pb);
}
if (size > INT64_MAX)
return AVERROR_INVALIDDATA;
return size;
}
static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
{
int i, b;
for (i = 0; i < size && !avio_feof(pb); i++) {
b = avio_r8(pb);
if (b == key[0])
i = 0;
else if (b != key[i])
i = -1;
}
return i == size;
}
static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
{
int64_t length, pos;
if (!mxf_read_sync(pb, mxf_klv_key, 4))
return AVERROR_INVALIDDATA;
klv->offset = avio_tell(pb) - 4;
memcpy(klv->key, mxf_klv_key, 4);
avio_read(pb, klv->key + 4, 12);
length = klv_decode_ber_length(pb);
if (length < 0)
return length;
klv->length = length;
pos = avio_tell(pb);
if (pos > INT64_MAX - length)
return AVERROR_INVALIDDATA;
klv->next_klv = pos + length;
return 0;
}
static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv, int body_sid)
{
int i;
for (i = 0; i < s->nb_streams; i++) {
MXFTrack *track = s->streams[i]->priv_data;
/* SMPTE 379M 7.3 */
if (track && (!body_sid || !track->body_sid || track->body_sid == body_sid) && !memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
return i;
}
/* return 0 if only one stream, for OP Atom files with 0 as track number */
return s->nb_streams == 1 && s->streams[0]->priv_data ? 0 : -1;
}
static int find_body_sid_by_absolute_offset(MXFContext *mxf, int64_t offset)
{
// we look for partition where the offset is placed
int a, b, m;
int64_t pack_ofs;
a = -1;
b = mxf->partitions_count;
while (b - a > 1) {
m = (a + b) >> 1;
pack_ofs = mxf->partitions[m].pack_ofs;
if (pack_ofs <= offset)
a = m;
else
b = m;
}
if (a == -1)
return 0;
return mxf->partitions[a].body_sid;
}
static int mxf_get_eia608_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt, int64_t length)
{
int count = avio_rb16(s->pb);
int cdp_identifier, cdp_length, cdp_footer_id, ccdata_id, cc_count;
int line_num, sample_coding, sample_count;
int did, sdid, data_length;
int i, ret;
if (count != 1)
av_log(s, AV_LOG_WARNING, "unsupported multiple ANC packets (%d) per KLV packet\n", count);
for (i = 0; i < count; i++) {
if (length < 6) {
av_log(s, AV_LOG_ERROR, "error reading s436m packet %"PRId64"\n", length);
return AVERROR_INVALIDDATA;
}
line_num = avio_rb16(s->pb);
avio_r8(s->pb); // wrapping type
sample_coding = avio_r8(s->pb);
sample_count = avio_rb16(s->pb);
length -= 6 + 8 + sample_count;
if (line_num != 9 && line_num != 11)
continue;
if (sample_coding == 7 || sample_coding == 8 || sample_coding == 9) {
av_log(s, AV_LOG_WARNING, "unsupported s436m 10 bit sample coding\n");
continue;
}
if (length < 0)
return AVERROR_INVALIDDATA;
avio_rb32(s->pb); // array count
avio_rb32(s->pb); // array elem size
did = avio_r8(s->pb);
sdid = avio_r8(s->pb);
data_length = avio_r8(s->pb);
if (did != 0x61 || sdid != 1) {
av_log(s, AV_LOG_WARNING, "unsupported did or sdid: %x %x\n", did, sdid);
continue;
}
cdp_identifier = avio_rb16(s->pb); // cdp id
if (cdp_identifier != 0x9669) {
av_log(s, AV_LOG_ERROR, "wrong cdp identifier %x\n", cdp_identifier);
return AVERROR_INVALIDDATA;
}
cdp_length = avio_r8(s->pb);
avio_r8(s->pb); // cdp_frame_rate
avio_r8(s->pb); // cdp_flags
avio_rb16(s->pb); // cdp_hdr_sequence_cntr
ccdata_id = avio_r8(s->pb); // ccdata_id
if (ccdata_id != 0x72) {
av_log(s, AV_LOG_ERROR, "wrong cdp data section %x\n", ccdata_id);
return AVERROR_INVALIDDATA;
}
cc_count = avio_r8(s->pb) & 0x1f;
ret = av_get_packet(s->pb, pkt, cc_count * 3);
if (ret < 0)
return ret;
if (cdp_length - 9 - 4 < cc_count * 3) {
av_log(s, AV_LOG_ERROR, "wrong cdp size %d cc count %d\n", cdp_length, cc_count);
return AVERROR_INVALIDDATA;
}
avio_skip(s->pb, data_length - 9 - 4 - cc_count * 3);
cdp_footer_id = avio_r8(s->pb);
if (cdp_footer_id != 0x74) {
av_log(s, AV_LOG_ERROR, "wrong cdp footer section %x\n", cdp_footer_id);
return AVERROR_INVALIDDATA;
}
avio_rb16(s->pb); // cdp_ftr_sequence_cntr
avio_r8(s->pb); // packet_checksum
break;
}
return 0;
}
/* XXX: use AVBitStreamFilter */
static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
{
const uint8_t *buf_ptr, *end_ptr;
uint8_t *data_ptr;
int i;
if (length > 61444) /* worst case PAL 1920 samples 8 channels */
return AVERROR_INVALIDDATA;
length = av_get_packet(pb, pkt, length);
if (length < 0)
return length;
data_ptr = pkt->data;
end_ptr = pkt->data + length;
buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
if (st->codecpar->channels > 8)
return AVERROR_INVALIDDATA;
for (; end_ptr - buf_ptr >= st->codecpar->channels * 4; ) {
for (i = 0; i < st->codecpar->channels; i++) {
uint32_t sample = bytestream_get_le32(&buf_ptr);
if (st->codecpar->bits_per_coded_sample == 24)
bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
else
bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
}
buf_ptr += 32 - st->codecpar->channels*4; // always 8 channels stored SMPTE 331M
}
av_shrink_packet(pkt, data_ptr - pkt->data);
return 0;
}
static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
{
static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
MXFContext *mxf = s->priv_data;
AVIOContext *pb = s->pb;
int64_t end = avio_tell(pb) + klv->length;
int64_t size;
uint64_t orig_size;
uint64_t plaintext_size;
uint8_t ivec[16];
uint8_t tmpbuf[16];
int index;
int body_sid;
if (!mxf->aesc && s->key && s->keylen == 16) {
mxf->aesc = av_aes_alloc();
if (!mxf->aesc)
return AVERROR(ENOMEM);
av_aes_init(mxf->aesc, s->key, 128, 1);
}
// crypto context
size = klv_decode_ber_length(pb);
if (size < 0)
return size;
avio_skip(pb, size);
// plaintext offset
klv_decode_ber_length(pb);
plaintext_size = avio_rb64(pb);
// source klv key
klv_decode_ber_length(pb);
avio_read(pb, klv->key, 16);
if (!IS_KLV_KEY(klv, mxf_essence_element_key))
return AVERROR_INVALIDDATA;
body_sid = find_body_sid_by_absolute_offset(mxf, klv->offset);
index = mxf_get_stream_index(s, klv, body_sid);
if (index < 0)
return AVERROR_INVALIDDATA;
// source size
klv_decode_ber_length(pb);
orig_size = avio_rb64(pb);
if (orig_size < plaintext_size)
return AVERROR_INVALIDDATA;
// enc. code
size = klv_decode_ber_length(pb);
if (size < 32 || size - 32 < orig_size || (int)orig_size != orig_size)
return AVERROR_INVALIDDATA;
avio_read(pb, ivec, 16);
avio_read(pb, tmpbuf, 16);
if (mxf->aesc)
av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
if (memcmp(tmpbuf, checkv, 16))
av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
size -= 32;
size = av_get_packet(pb, pkt, size);
if (size < 0)
return size;
else if (size < plaintext_size)
return AVERROR_INVALIDDATA;
size -= plaintext_size;
if (mxf->aesc)
av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
&pkt->data[plaintext_size], size >> 4, ivec, 1);
av_shrink_packet(pkt, orig_size);
pkt->stream_index = index;
avio_skip(pb, end - avio_tell(pb));
return 0;
}
static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
{
MXFContext *mxf = arg;
int item_num = avio_rb32(pb);
int item_len = avio_rb32(pb);
if (item_len != 18) {
avpriv_request_sample(pb, "Primer pack item length %d", item_len);
return AVERROR_PATCHWELCOME;
}
if (item_num > 65536 || item_num < 0) {
av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
return AVERROR_INVALIDDATA;
}
if (mxf->local_tags)
av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple primer packs\n");
av_free(mxf->local_tags);
mxf->local_tags_count = 0;
mxf->local_tags = av_calloc(item_num, item_len);
if (!mxf->local_tags)
return AVERROR(ENOMEM);
mxf->local_tags_count = item_num;
avio_read(pb, mxf->local_tags, item_num*item_len);
return 0;
}
static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
{
MXFContext *mxf = arg;
AVFormatContext *s = mxf->fc;
MXFPartition *partition, *tmp_part;
UID op;
uint64_t footer_partition;
uint32_t nb_essence_containers;
if (mxf->partitions_count >= INT_MAX / 2)
return AVERROR_INVALIDDATA;
tmp_part = av_realloc_array(mxf->partitions, mxf->partitions_count + 1, sizeof(*mxf->partitions));
if (!tmp_part)
return AVERROR(ENOMEM);
mxf->partitions = tmp_part;
if (mxf->parsing_backward) {
/* insert the new partition pack in the middle
* this makes the entries in mxf->partitions sorted by offset */
memmove(&mxf->partitions[mxf->last_forward_partition+1],
&mxf->partitions[mxf->last_forward_partition],
(mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
} else {
mxf->last_forward_partition++;
partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
}
memset(partition, 0, sizeof(*partition));
mxf->partitions_count++;
partition->pack_length = avio_tell(pb) - klv_offset + size;
partition->pack_ofs = klv_offset;
switch(uid[13]) {
case 2:
partition->type = Header;
break;
case 3:
partition->type = BodyPartition;
break;
case 4:
partition->type = Footer;
break;
default:
av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
return AVERROR_INVALIDDATA;
}
/* consider both footers to be closed (there is only Footer and CompleteFooter) */
partition->closed = partition->type == Footer || !(uid[14] & 1);
partition->complete = uid[14] > 2;
avio_skip(pb, 4);
partition->kag_size = avio_rb32(pb);
partition->this_partition = avio_rb64(pb);
partition->previous_partition = avio_rb64(pb);
footer_partition = avio_rb64(pb);
partition->header_byte_count = avio_rb64(pb);
partition->index_byte_count = avio_rb64(pb);
partition->index_sid = avio_rb32(pb);
partition->body_offset = avio_rb64(pb);
partition->body_sid = avio_rb32(pb);
if (avio_read(pb, op, sizeof(UID)) != sizeof(UID)) {
av_log(mxf->fc, AV_LOG_ERROR, "Failed reading UID\n");
return AVERROR_INVALIDDATA;
}
nb_essence_containers = avio_rb32(pb);
if (partition->type == Header) {
char str[36];
snprintf(str, sizeof(str), "%08x.%08x.%08x.%08x", AV_RB32(&op[0]), AV_RB32(&op[4]), AV_RB32(&op[8]), AV_RB32(&op[12]));
av_dict_set(&s->metadata, "operational_pattern_ul", str, 0);
}
if (partition->this_partition &&
partition->previous_partition == partition->this_partition) {
av_log(mxf->fc, AV_LOG_ERROR,
"PreviousPartition equal to ThisPartition %"PRIx64"\n",
partition->previous_partition);
/* override with the actual previous partition offset */
if (!mxf->parsing_backward && mxf->last_forward_partition > 1) {
MXFPartition *prev =
mxf->partitions + mxf->last_forward_partition - 2;
partition->previous_partition = prev->this_partition;
}
/* if no previous body partition are found point to the header
* partition */
if (partition->previous_partition == partition->this_partition)
partition->previous_partition = 0;
av_log(mxf->fc, AV_LOG_ERROR,
"Overriding PreviousPartition with %"PRIx64"\n",
partition->previous_partition);
}
/* some files don't have FooterPartition set in every partition */
if (footer_partition) {
if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
av_log(mxf->fc, AV_LOG_ERROR,
"inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
mxf->footer_partition, footer_partition);
} else {
mxf->footer_partition = footer_partition;
}
}
av_log(mxf->fc, AV_LOG_TRACE,
"PartitionPack: ThisPartition = 0x%"PRIX64
", PreviousPartition = 0x%"PRIX64", "
"FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
partition->this_partition,
partition->previous_partition, footer_partition,
partition->index_sid, partition->body_sid);
/* sanity check PreviousPartition if set */
//NOTE: this isn't actually enough, see mxf_seek_to_previous_partition()
if (partition->previous_partition &&
mxf->run_in + partition->previous_partition >= klv_offset) {
av_log(mxf->fc, AV_LOG_ERROR,
"PreviousPartition points to this partition or forward\n");
return AVERROR_INVALIDDATA;
}
if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
else if (op[12] == 0x10) {
/* SMPTE 390m: "There shall be exactly one essence container"
* The following block deals with files that violate this, namely:
* 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
* abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
if (nb_essence_containers != 1) {
MXFOP op = nb_essence_containers ? OP1a : OPAtom;
/* only nag once */
if (!mxf->op)
av_log(mxf->fc, AV_LOG_WARNING,
"\"OPAtom\" with %"PRIu32" ECs - assuming %s\n",
nb_essence_containers,
op == OP1a ? "OP1a" : "OPAtom");
mxf->op = op;
} else
mxf->op = OPAtom;
} else {
av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
mxf->op = OP1a;
}
if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %"PRId32" - guessing ",
partition->kag_size);
if (mxf->op == OPSONYOpt)
partition->kag_size = 512;
else
partition->kag_size = 1;
av_log(mxf->fc, AV_LOG_WARNING, "%"PRId32"\n", partition->kag_size);
}
return 0;
}
static uint64_t partition_score(MXFPartition *p)
{
uint64_t score;
if (!p)
return 0;
if (p->type == Footer)
score = 5;
else if (p->complete)
score = 4;
else if (p->closed)
score = 3;
else
score = 1;
return (score << 60) | ((uint64_t)p->this_partition >> 4);
}
static int mxf_add_metadata_set(MXFContext *mxf, MXFMetadataSet **metadata_set)
{
MXFMetadataSet **tmp;
enum MXFMetadataSetType type = (*metadata_set)->type;
// Index Table is special because it might be added manually without
// partition and we iterate thorugh all instances of them. Also some files
// use the same Instance UID for different index tables...
if (type != IndexTableSegment) {
for (int i = 0; i < mxf->metadata_sets_count; i++) {
if (!memcmp((*metadata_set)->uid, mxf->metadata_sets[i]->uid, 16) && type == mxf->metadata_sets[i]->type) {
uint64_t old_s = mxf->metadata_sets[i]->partition_score;
uint64_t new_s = (*metadata_set)->partition_score;
if (old_s > new_s) {
mxf_free_metadataset(metadata_set, 1);
return 0;
}
}
}
}
tmp = av_realloc_array(mxf->metadata_sets, mxf->metadata_sets_count + 1, sizeof(*mxf->metadata_sets));
if (!tmp) {
mxf_free_metadataset(metadata_set, 1);
return AVERROR(ENOMEM);
}
mxf->metadata_sets = tmp;
mxf->metadata_sets[mxf->metadata_sets_count] = *metadata_set;
mxf->metadata_sets_count++;
return 0;
}
static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
{
MXFCryptoContext *cryptocontext = arg;
if (size != 16)
return AVERROR_INVALIDDATA;
if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
avio_read(pb, cryptocontext->source_container_ul, 16);
return 0;
}
static int mxf_read_strong_ref_array(AVIOContext *pb, UID **refs, int *count)
{
*count = avio_rb32(pb);
av_free(*refs);
*refs = av_calloc(*count, sizeof(UID));
if (!*refs) {
*count = 0;
return AVERROR(ENOMEM);
}
avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
avio_read(pb, (uint8_t *)*refs, *count * sizeof(UID));
return 0;
}
static inline int mxf_read_utf16_string(AVIOContext *pb, int size, char** str, int be)
{
int ret;
size_t buf_size;
if (size < 0 || size > INT_MAX/2)
return AVERROR(EINVAL);
buf_size = size + size / 2 + 1;
av_free(*str);
*str = av_malloc(buf_size);
if (!*str)
return AVERROR(ENOMEM);
if (be)
ret = avio_get_str16be(pb, size, *str, buf_size);
else
ret = avio_get_str16le(pb, size, *str, buf_size);
if (ret < 0) {
av_freep(str);
return ret;
}
return ret;
}
#define READ_STR16(type, big_endian) \
static int mxf_read_utf16 ## type ##_string(AVIOContext *pb, int size, char** str) \
{ \
return mxf_read_utf16_string(pb, size, str, big_endian); \
}
READ_STR16(be, 1)
READ_STR16(le, 0)
#undef READ_STR16
static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
{
MXFContext *mxf = arg;
switch (tag) {
case 0x1901:
if (mxf->packages_refs)
av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple packages_refs\n");
return mxf_read_strong_ref_array(pb, &mxf->packages_refs, &mxf->packages_count);
case 0x1902:
return mxf_read_strong_ref_array(pb, &mxf->essence_container_data_refs, &mxf->essence_container_data_count);
}
return 0;
}
static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
{
MXFStructuralComponent *source_clip = arg;
switch(tag) {
case 0x0202:
source_clip->duration = avio_rb64(pb);
break;
case 0x1201:
source_clip->start_position = avio_rb64(pb);
break;
case 0x1101:
/* UMID, only get last 16 bytes */
avio_read(pb, source_clip->source_package_ul, 16);
avio_read(pb, source_clip->source_package_uid, 16);
break;
case 0x1102:
source_clip->source_track_id = avio_rb32(pb);
break;
}
return 0;
}
static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
{
MXFTimecodeComponent *mxf_timecode = arg;
switch(tag) {
case 0x1501:
mxf_timecode->start_frame = avio_rb64(pb);
break;
case 0x1502:
mxf_timecode->rate = (AVRational){avio_rb16(pb), 1};
break;
case 0x1503:
mxf_timecode->drop_frame = avio_r8(pb);
break;
}
return 0;
}
static int mxf_read_pulldown_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
{
MXFPulldownComponent *mxf_pulldown = arg;