RepoMirrors/ffmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2024-12-27 01:42:20 +00:00
Code Issues Projects Releases Wiki Activity

avformat/mxfdec: use both body_sid and track_number to find the track of a packet

Browse Source 
In order to do that we have to parse the EssenceContainerData and assign the
proper body_sid and index_sid to the tracks from the corresponding source
packages.

This fixes packets returned in the wrong stream for some OP1-b files.

Based on a patch by Alex Mogurenko from https://github.com/da8eat/FFmpeg

Reference: http://mogurenko.com/2018/01/02/mxf-op1b-ffmpeg-part1/

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2018-02-06 22:41:16 +01:00
parent 9ec3e61fc3
commit 9492bb58ee
1 changed files with 83 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

87
libavformat/mxfdec.c
View File

@ -162,6 +162,8 @@ typedef struct {
int intra_only;
uint64_t sample_count;
int64_t original_duration; /* st->duration in SampleRate/EditRate units */
int index_sid;
int body_sid;
} MXFTrack;
typedef struct MXFDescriptor {
@ -223,6 +225,15 @@ typedef struct MXFPackage {
int comment_count;
} MXFPackage;
typedef struct MXFEssenceContainerData {
UID uid;
enum MXFMetadataSetType type;
UID package_uid;
UID package_ul;
int index_sid;
int body_sid;
} MXFEssenceContainerData;
typedef struct MXFMetadataSet {
UID uid;
enum MXFMetadataSetType type;
@ -247,6 +258,8 @@ typedef struct MXFContext {
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;
@ -385,20 +398,43 @@ static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
return klv->length == -1 ? -1 : 0;
}
static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
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 && !memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
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 ? 0 : -1;
}
static int find_body_sid_by_offset(MXFContext *mxf, int64_t offset)
{
// we look for partition where the offset is placed
int a, b, m;
int64_t this_partition;
a = -1;
b = mxf->partitions_count;
while (b - a > 1) {
m = (a + b) >> 1;
this_partition = mxf->partitions[m].this_partition;
if (this_partition <= offset)
a = m;
else
b = m;
}
if (a == -1)
return 0;
return mxf->partitions[a].body_sid;
}
/* XXX: use AVBitStreamFilter */
static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
{
@ -440,6 +476,7 @@ static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv
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();
@ -457,7 +494,9 @@ static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv
avio_read(pb, klv->key, 16);
if (!IS_KLV_KEY(klv, mxf_essence_element_key))
return AVERROR_INVALIDDATA;
index = mxf_get_stream_index(s, klv);
body_sid = find_body_sid_by_offset(mxf, klv->offset);
index = mxf_get_stream_index(s, klv, body_sid);
if (index < 0)
return AVERROR_INVALIDDATA;
// source size
@ -757,6 +796,9 @@ static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int siz
av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple packages_refs\n");
av_free(mxf->packages_refs);
return mxf_read_strong_ref_array(pb, &mxf->packages_refs, &mxf->packages_count);
case 0x1902:
av_free(mxf->essence_container_data_refs);
return mxf_read_strong_ref_array(pb, &mxf->essence_container_data_refs, &mxf->essence_container_data_count);
}
return 0;
}
@ -893,6 +935,25 @@ static int mxf_read_package(void *arg, AVIOContext *pb, int tag, int size, UID u
return 0;
}
static int mxf_read_essence_container_data(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
{
MXFEssenceContainerData *essence_data = arg;
switch(tag) {
case 0x2701:
/* linked package umid UMID */
avio_read(pb, essence_data->package_ul, 16);
avio_read(pb, essence_data->package_uid, 16);
break;
case 0x3f06:
essence_data->index_sid = avio_rb32(pb);
break;
case 0x3f07:
essence_data->body_sid = avio_rb32(pb);
break;
}
return 0;
}
static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
{
int i, length;
@ -1996,6 +2057,21 @@ static int mxf_parse_structural_metadata(MXFContext *mxf)
av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
break;
}
for (k = 0; k < mxf->essence_container_data_count; k++) {
MXFEssenceContainerData *essence_data;
if (!(essence_data = mxf_resolve_strong_ref(mxf, &mxf->essence_container_data_refs[k], EssenceContainerData))) {
av_log(mxf, AV_LOG_TRACE, "could not resolve essence container data strong ref\n");
continue;
}
if (!memcmp(component->source_package_ul, essence_data->package_ul, sizeof(UID)) && !memcmp(component->source_package_uid, essence_data->package_uid, sizeof(UID))) {
source_track->body_sid = essence_data->body_sid;
source_track->index_sid = essence_data->index_sid;
break;
}
}
if(source_track && component)
break;
}
@ -2402,6 +2478,7 @@ static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
{ { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0c,0x00 }, mxf_read_pulldown_component, sizeof(MXFPulldownComponent), PulldownComponent },
{ { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
{ { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
{ { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x23,0x00 }, mxf_read_essence_container_data, sizeof(MXFEssenceContainerData), EssenceContainerData },
{ { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
};
@ -3111,7 +3188,8 @@ static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
IS_KLV_KEY(klv.key, mxf_canopus_essence_element_key) ||
IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
int index = mxf_get_stream_index(s, &klv);
int body_sid = find_body_sid_by_offset(mxf, klv.offset);
int index = mxf_get_stream_index(s, &klv, body_sid);
int64_t next_ofs, next_klv;
AVStream *st;
@ -3237,6 +3315,7 @@ static int mxf_read_close(AVFormatContext *s)
int i;
av_freep(&mxf->packages_refs);
av_freep(&mxf->essence_container_data_refs);
for (i = 0; i < s->nb_streams; i++)
s->streams[i]->priv_data = NULL;