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mxfdec: calculate the index in display order

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This should fix seeking for open GOP files as well.

Reviewed-by: Tomas Härdin <tomas.hardin@codemill.se>
Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2015-07-11 18:10:12 +02:00
parent 6e127990fa
commit 53f2ef2c4a
2 changed files with 21 additions and 4 deletions
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23
libavformat/mxfdec.c
View File

@ -233,6 +233,7 @@ typedef struct MXFIndexTable {
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 {
@ -1334,6 +1335,7 @@ static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_ta
{
int i, j, x;
int8_t max_temporal_offset = -128;
uint8_t *flags;
/* first compute how many entries we have */
for (i = 0; i < index_table->nb_segments; i++) {
@ -1352,8 +1354,12 @@ static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_ta
return 0;
if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
!(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
!(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry))) ||
!(index_table->offsets = av_calloc(index_table->nb_ptses, sizeof(int8_t))) ||
!(flags = av_calloc(index_table->nb_ptses, sizeof(uint8_t)))) {
av_freep(&index_table->ptses);
av_freep(&index_table->fake_index);
av_freep(&index_table->offsets);
return AVERROR(ENOMEM);
}
@ -1411,8 +1417,7 @@ static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_ta
break;
}
index_table->fake_index[x].timestamp = x;
index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
flags[x] = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
if (index < 0 || index >= index_table->nb_ptses) {
av_log(mxf->fc, AV_LOG_ERROR,
@ -1421,11 +1426,20 @@ static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_ta
continue;
}
index_table->offsets[x] = offset;
index_table->ptses[index] = x;
max_temporal_offset = FFMAX(max_temporal_offset, offset);
}
}
/* calculate the fake index table in display order */
for (x = 0; x < index_table->nb_ptses; x++) {
index_table->fake_index[x].timestamp = x;
if (index_table->ptses[x] != AV_NOPTS_VALUE)
index_table->fake_index[index_table->ptses[x]].flags = flags[x];
}
av_freep(&flags);
index_table->first_dts = -max_temporal_offset;
return 0;
@ -3085,6 +3099,7 @@ static int mxf_read_close(AVFormatContext *s)
av_freep(&mxf->index_tables[i].segments);
av_freep(&mxf->index_tables[i].ptses);
av_freep(&mxf->index_tables[i].fake_index);
av_freep(&mxf->index_tables[i].offsets);
}
}
av_freep(&mxf->index_tables);
@ -3158,6 +3173,8 @@ static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_ti
/* behave as if we have a proper index */
if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
return sample_time;
/* get the stored order index from the display order index */
sample_time += t->offsets[sample_time];
} else {
/* no IndexEntryArray (one or more CBR segments)
* make sure we don't seek past the end */

2
tests/ref/seek/lavf-mxf
View File

@ -43,6 +43,6 @@ ret:-1 st: 1 flags:0 ts: 2.671667
ret: 0 st: 1 flags:1 ts: 1.565833
ret: 0 st: 0 flags:1 dts: 0.840000 pts: 0.960000 pos: 460800 size: 24711
ret: 0 st:-1 flags:0 ts: 0.460008
ret: 0 st: 0 flags:1 dts: 0.840000 pts: 0.960000 pos: 460800 size: 24711
ret: 0 st: 0 flags:1 dts: 0.360000 pts: 0.480000 pos: 211968 size: 24786
ret: 0 st:-1 flags:1 ts:-0.645825
ret: 0 st: 0 flags:1 dts:-0.040000 pts: 0.000000 pos: 6656 size: 24801