[FFmpeg-cvslog] avformat/mxfdec: add support for returning the partition for mxf_edit_unit_absolute_offset and mxf_absolute_bodysid_offset
Marton Balint
git at videolan.org
Sun Jun 24 21:44:20 EEST 2018
ffmpeg | branch: master | Marton Balint <cus at passwd.hu> | Sat May 26 12:24:01 2018 +0200| [e7b1a8371878a2e7bd318b81a7e2706d636efb58] | committer: Marton Balint
avformat/mxfdec: add support for returning the partition for mxf_edit_unit_absolute_offset and mxf_absolute_bodysid_offset
Signed-off-by: Marton Balint <cus at passwd.hu>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e7b1a8371878a2e7bd318b81a7e2706d636efb58
---
libavformat/mxfdec.c | 18 ++++++++++--------
1 file changed, 10 insertions(+), 8 deletions(-)
diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index 867d349291..acd79989df 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -1401,7 +1401,7 @@ static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segment
/**
* Computes the absolute file offset of the given essence container offset
*/
-static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
+static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out, MXFPartition **partition_out)
{
MXFPartition *last_p = NULL;
int a, b, m, m0;
@@ -1429,6 +1429,8 @@ static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t of
if (last_p && (!last_p->essence_length || last_p->essence_length > (offset - last_p->body_offset))) {
*offset_out = last_p->essence_offset + (offset - last_p->body_offset);
+ if (partition_out)
+ *partition_out = last_p;
return 0;
}
@@ -1463,7 +1465,7 @@ static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
}
/* EditUnit -> absolute offset */
-static int mxf_edit_unit_absolute_offset(MXFContext *mxf, MXFIndexTable *index_table, int64_t edit_unit, int64_t *edit_unit_out, int64_t *offset_out, int nag)
+static int mxf_edit_unit_absolute_offset(MXFContext *mxf, MXFIndexTable *index_table, int64_t edit_unit, int64_t *edit_unit_out, int64_t *offset_out, MXFPartition **partition_out, int nag)
{
int i;
int64_t offset_temp = 0;
@@ -1498,7 +1500,7 @@ static int mxf_edit_unit_absolute_offset(MXFContext *mxf, MXFIndexTable *index_t
if (edit_unit_out)
*edit_unit_out = edit_unit;
- return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
+ return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out, partition_out);
} else {
/* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
offset_temp += s->edit_unit_byte_count * s->index_duration;
@@ -3145,7 +3147,7 @@ static int mxf_get_next_track_edit_unit(MXFContext *mxf, MXFTrack *track, int64_
while (b - a > 1) {
m = (a + b) >> 1;
- if (mxf_edit_unit_absolute_offset(mxf, t, m, NULL, &offset, 0) < 0)
+ if (mxf_edit_unit_absolute_offset(mxf, t, m, NULL, &offset, NULL, 0) < 0)
return -1;
if (offset < current_offset)
a = m;
@@ -3174,7 +3176,7 @@ static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset
/* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
while (mxf->current_edit_unit >= 0) {
- if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
+ if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, NULL, 0) < 0)
return -2;
if (next_ofs <= last_ofs) {
@@ -3394,12 +3396,12 @@ static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
edit_units = FFMIN(track->edit_units_per_packet, track->original_duration - mxf->current_edit_unit);
- if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
+ if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, NULL, 1)) < 0)
return ret;
/* compute size by finding the next edit unit or the end of the essence container
* not pretty, but it works */
- if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
+ if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, NULL, 0)) < 0 &&
(next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
return AVERROR_INVALIDDATA;
@@ -3560,7 +3562,7 @@ static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_ti
sample_time = FFMIN(sample_time, source_track->original_duration - 1);
}
- if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) < 0)
+ if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, NULL, 1)) < 0)
return ret;
ff_update_cur_dts(s, st, sample_time);
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