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mxfdec: Merge last_partition and footer_partition

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FooterPartition offset specified in RIP takes precedence over any value written
in PartitionPacks. This fixes the same issue f06f6da tries to fix without
introducing an extra variable.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Tomas Härdin 2014-10-28 14:27:06 +01:00 committed by Michael Niedermayer
parent 1b17b64ee4
commit b83affdc94
1 changed files with 10 additions and 14 deletions
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24
libavformat/mxfdec.c
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@ -227,7 +227,6 @@ typedef struct {
struct AVAES *aesc;
uint8_t *local_tags;
int local_tags_count;
uint64_t last_partition;
uint64_t footer_partition;
KLVPacket current_klv_data;
int current_klv_index;
@ -2141,30 +2140,27 @@ static int mxf_parse_handle_essence(MXFContext *mxf)
if (mxf->parsing_backward) {
return mxf_seek_to_previous_partition(mxf);
} else {
uint64_t offset = mxf->footer_partition ? mxf->footer_partition
: mxf->last_partition;
if (!offset) {
av_dlog(mxf->fc, "no last partition\n");
if (!mxf->footer_partition) {
av_dlog(mxf->fc, "no FooterPartition\n");
return 0;
}
av_dlog(mxf->fc, "seeking to last partition\n");
av_dlog(mxf->fc, "seeking to FooterPartition\n");
/* remember where we were so we don't end up seeking further back than this */
mxf->last_forward_tell = avio_tell(pb);
if (!pb->seekable) {
av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing last partition\n");
av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing FooterPartition\n");
return -1;
}
/* seek to last partition and parse backward */
if ((ret = avio_seek(pb, mxf->run_in + offset, SEEK_SET)) < 0) {
/* seek to FooterPartition and parse backward */
if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
av_log(mxf->fc, AV_LOG_ERROR,
"failed to seek to last partition @ 0x%" PRIx64
"failed to seek to FooterPartition @ 0x%" PRIx64
" (%"PRId64") - partial file?\n",
mxf->run_in + offset, ret);
mxf->run_in + mxf->footer_partition, ret);
return ret;
}
@ -2202,7 +2198,7 @@ static void mxf_compute_essence_containers(MXFContext *mxf)
continue; /* BodySID == 0 -> no essence */
if (x >= mxf->partitions_count - 1)
break; /* last partition - can't compute length (and we don't need to) */
break; /* FooterPartition - can't compute length (and we don't need to) */
/* essence container spans to the next partition */
p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
@ -2283,7 +2279,7 @@ static void mxf_read_random_index_pack(AVFormatContext *s)
goto end;
avio_skip(s->pb, klv.length - 12);
mxf->last_partition = avio_rb64(s->pb);
mxf->footer_partition = avio_rb64(s->pb);
end:
avio_seek(s->pb, mxf->run_in, SEEK_SET);