From: Limin Wang <lance.lmw...@gmail.com>
Signed-off-by: Limin Wang <lance.lmw...@gmail.com>
---
libavutil/timecode.c | 26 ++++++++++++++++++++++++++
libavutil/timecode.h | 9 +++++++++
2 files changed, 35 insertions(+)
diff --git a/libavutil/timecode.c b/libavutil/timecode.c
index 60077ba..7a7ed1d 100644
--- a/libavutil/timecode.c
+++ b/libavutil/timecode.c
@@ -81,6 +81,32 @@ uint32_t av_timecode_get_smpte_from_framenum(const
AVTimecode *tc, int framenum)
(hh % 10); // units of hours
}
+uint32_t av_timecode_get_smpte_by_tc_string(const char *buf)
+{
+ char c;
+ int hh, mm, ss, ff, drop;
+
+ if (sscanf(buf, "%d:%d:%d%c%d", &hh, &mm, &ss, &c, &ff) != 5) {
+ return AVERROR_INVALIDDATA;
+ }
+ drop = c != ':' ? AV_TIMECODE_FLAG_DROPFRAME : 0; // drop if ';', '.', ...
+
+ return 0 << 31 | // color frame flag (0: unsync mode, 1: sync mode)
+ drop << 30 | // drop frame flag (0: non drop, 1: drop)
+ (ff / 10) << 28 | // tens of frames
+ (ff % 10) << 24 | // units of frames
+ 0 << 23 | // PC (NTSC) or BGF0 (PAL)
+ (ss / 10) << 20 | // tens of seconds
+ (ss % 10) << 16 | // units of seconds
+ 0 << 15 | // BGF0 (NTSC) or BGF2 (PAL)
+ (mm / 10) << 12 | // tens of minutes
+ (mm % 10) << 8 | // units of minutes
+ 0 << 7 | // BGF2 (NTSC) or PC (PAL)
+ 0 << 6 | // BGF1
+ (hh / 10) << 4 | // tens of hours
+ (hh % 10); // units of hours
+}
+
char *av_timecode_make_string(const AVTimecode *tc, char *buf, int framenum)
{
int fps = tc->fps;
diff --git a/libavutil/timecode.h b/libavutil/timecode.h
index 37c1361..7bb4b78 100644
--- a/libavutil/timecode.h
+++ b/libavutil/timecode.h
@@ -71,6 +71,15 @@ int av_timecode_adjust_ntsc_framenum2(int framenum, int fps);
uint32_t av_timecode_get_smpte_from_framenum(const AVTimecode *tc, int
framenum);
/**
+ * Convert TC string to SMPTE 12M binary representation.
+ *
+ * @param buf TC string
+ * @return the SMPTE binary representation, or AVERROR otherwise
+ *
+ */
+uint32_t av_timecode_get_smpte_by_tc_string(const char *buf);
+
+/**
* Load timecode string in buf.
*
* @param buf destination buffer, must be at least AV_TIMECODE_STR_SIZE
long
--
1.8.3.1
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