[FFmpeg-cvslog] avutil/timecode: add av_timecode_make_smpte_tc_string2
Marton Balint
git at videolan.org
Sun Sep 13 19:50:38 EEST 2020
ffmpeg | branch: master | Marton Balint <cus at passwd.hu> | Fri Jul 24 15:09:32 2020 +0200| [837b6eb90edb8b21b3547876bbf74fe6f45147d0] | committer: Marton Balint
avutil/timecode: add av_timecode_make_smpte_tc_string2
Signed-off-by: Marton Balint <cus at passwd.hu>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=837b6eb90edb8b21b3547876bbf74fe6f45147d0
---
doc/APIchanges | 3 +++
libavutil/timecode.c | 19 ++++++++++++++++++-
libavutil/timecode.h | 17 +++++++++++++++++
libavutil/version.h | 2 +-
4 files changed, 39 insertions(+), 2 deletions(-)
diff --git a/doc/APIchanges b/doc/APIchanges
index 0054908e1e..e2d7369c83 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -15,6 +15,9 @@ libavutil: 2017-10-21
API changes, most recent first:
+2020-09-xx - xxxxxxxxxx - lavu 56.59.100 - timecode.h
+ Add av_timecode_make_smpte_tc_string2.
+
2020-08-21 - xxxxxxxxxx - lavu 56.58.100 - avstring.h
Deprecate av_d2str(). Use av_asprintf() instead.
diff --git a/libavutil/timecode.c b/libavutil/timecode.c
index 806638ddfc..f2db21c52c 100644
--- a/libavutil/timecode.c
+++ b/libavutil/timecode.c
@@ -136,16 +136,33 @@ static unsigned bcd2uint(uint8_t bcd)
return low + 10*high;
}
-char *av_timecode_make_smpte_tc_string(char *buf, uint32_t tcsmpte, int prevent_df)
+char *av_timecode_make_smpte_tc_string2(char *buf, AVRational rate, uint32_t tcsmpte, int prevent_df, int skip_field)
{
unsigned hh = bcd2uint(tcsmpte & 0x3f); // 6-bit hours
unsigned mm = bcd2uint(tcsmpte>>8 & 0x7f); // 7-bit minutes
unsigned ss = bcd2uint(tcsmpte>>16 & 0x7f); // 7-bit seconds
unsigned ff = bcd2uint(tcsmpte>>24 & 0x3f); // 6-bit frames
unsigned drop = tcsmpte & 1<<30 && !prevent_df; // 1-bit drop if not arbitrary bit
+
+ if (av_cmp_q(rate, (AVRational) {30, 1}) == 1) {
+ ff <<= 1;
+ if (!skip_field) {
+ if (av_cmp_q(rate, (AVRational) {50, 1}) == 0)
+ ff += !!(tcsmpte & 1 << 7);
+ else
+ ff += !!(tcsmpte & 1 << 23);
+ }
+ }
+
snprintf(buf, AV_TIMECODE_STR_SIZE, "%02u:%02u:%02u%c%02u",
hh, mm, ss, drop ? ';' : ':', ff);
return buf;
+
+}
+
+char *av_timecode_make_smpte_tc_string(char *buf, uint32_t tcsmpte, int prevent_df)
+{
+ return av_timecode_make_smpte_tc_string2(buf, (AVRational){30, 1}, tcsmpte, prevent_df, 1);
}
char *av_timecode_make_mpeg_tc_string(char *buf, uint32_t tc25bit)
diff --git a/libavutil/timecode.h b/libavutil/timecode.h
index e54b116e93..f9471a6e38 100644
--- a/libavutil/timecode.h
+++ b/libavutil/timecode.h
@@ -109,6 +109,23 @@ uint32_t av_timecode_get_smpte(AVRational rate, int drop, int hh, int mm, int ss
*/
char *av_timecode_make_string(const AVTimecode *tc, char *buf, int framenum);
+/**
+ * Get the timecode string from the SMPTE timecode format.
+ *
+ * In contrast to av_timecode_make_smpte_tc_string this function supports 50/60
+ * fps timecodes by using the field bit.
+ *
+ * @param buf destination buffer, must be at least AV_TIMECODE_STR_SIZE long
+ * @param rate frame rate of the timecode
+ * @param tcsmpte the 32-bit SMPTE timecode
+ * @param prevent_df prevent the use of a drop flag when it is known the DF bit
+ * is arbitrary
+ * @param skip_field prevent the use of a field flag when it is known the field
+ * bit is arbitrary (e.g. because it is used as PC flag)
+ * @return the buf parameter
+ */
+char *av_timecode_make_smpte_tc_string2(char *buf, AVRational rate, uint32_t tcsmpte, int prevent_df, int skip_field);
+
/**
* Get the timecode string from the SMPTE timecode format.
*
diff --git a/libavutil/version.h b/libavutil/version.h
index 3f0a4a8402..7028bd2c88 100644
--- a/libavutil/version.h
+++ b/libavutil/version.h
@@ -79,7 +79,7 @@
*/
#define LIBAVUTIL_VERSION_MAJOR 56
-#define LIBAVUTIL_VERSION_MINOR 58
+#define LIBAVUTIL_VERSION_MINOR 59
#define LIBAVUTIL_VERSION_MICRO 100
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
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