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avcodec/utils: factor the timecode fields out of ff_alloc_timecode_sei

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(cherry picked from commit a290dec0bf)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2026-07-26 23:06:23 +02:00
parent 2493e213ea
commit 00cc404767
1 changed files with 18 additions and 12 deletions
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30
libavcodec/utils.c
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@@ -986,6 +986,22 @@ AVCPBProperties *av_cpb_properties_alloc(size_t *size)
return props;
}
static void put_timecode_fields(PutBitContext *pb, AVRational rate, uint32_t tc)
{
unsigned hours, minutes, seconds, frames, drop;
ff_timecode_set_smpte(&drop, &hours, &minutes, &seconds, &frames, rate, tc, 0, 0);
put_bits(pb, 5, 0); // counting_type
put_bits(pb, 1, 1); // full_timestamp_flag
put_bits(pb, 1, 0); // discontinuity_flag
put_bits(pb, 1, drop); // cnt_dropped_flag
put_bits(pb, 9, frames);
put_bits(pb, 6, seconds);
put_bits(pb, 6, minutes);
put_bits(pb, 5, hours);
}
int ff_alloc_timecode_sei(const AVFrame *frame, AVRational rate, size_t prefix_len,
void **data, size_t *sei_size)
{
@@ -1015,20 +1031,10 @@ int ff_alloc_timecode_sei(const AVFrame *frame, AVRational rate, size_t prefix_l
put_bits(&pb, 2, m); // num_clock_ts
for (int j = 1; j <= m; j++) {
unsigned hh, mm, ss, ff, drop;
ff_timecode_set_smpte(&drop, &hh, &mm, &ss, &ff, rate, tc[j], 0, 0);
put_bits(&pb, 1, 1); // clock_timestamp_flag
put_bits(&pb, 1, 1); // units_field_based_flag
put_bits(&pb, 5, 0); // counting_type
put_bits(&pb, 1, 1); // full_timestamp_flag
put_bits(&pb, 1, 0); // discontinuity_flag
put_bits(&pb, 1, drop);
put_bits(&pb, 9, ff);
put_bits(&pb, 6, ss);
put_bits(&pb, 6, mm);
put_bits(&pb, 5, hh);
put_bits(&pb, 5, 0);
put_timecode_fields(&pb, rate, tc[j]);
put_bits(&pb, 5, 0); // time_offset_length
}
flush_put_bits(&pb);