[FFmpeg-devel] [PATCH] avfilter/vf_telecine: Add ts_mode option for using the first input timestamp

[Himangi Saraogi]

---
 libavfilter/vf_telecine.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/libavfilter/vf_telecine.c b/libavfilter/vf_telecine.c
index a0f28d4..aaad2b5 100644
--- a/libavfilter/vf_telecine.c
+++ b/libavfilter/vf_telecine.c
@@ -38,6 +38,8 @@ typedef struct {
     int first_field;
     char *pattern;
     unsigned int pattern_pos;
+    int ts_mode;
+    int64_t start_time;
 
     AVRational pts;
     double ts_unit;
@@ -62,6 +64,7 @@ static const AVOption telecine_options[] = {
         {"bottom", "select bottom field first",             0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "field"},
         {"b",      "select bottom field first",             0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "field"},
     {"pattern", "pattern that describe for how many fields a frame is to be displayed", OFFSET(pattern), AV_OPT_TYPE_STRING, {.str="23"}, 0, 0, FLAGS},
+    {"ts_mode", "set to choose timestamp handling as being with respect to the input", OFFSET(ts_mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
     {NULL}
 };
 
@@ -89,6 +92,10 @@ static av_cold int init(AVFilterContext *ctx)
         s->pts.den += *p - '0';
     }
 
+    s->start_time = 0;
+    if (s->ts_mode)
+         s->start_time = -1;
+
     s->out_cnt = (max + 1) / 2;
     av_log(ctx, AV_LOG_INFO, "Telecine pattern %s yields up to %d frames per frame, pts advance factor: %d/%d\n",
            s->pattern, s->out_cnt, s->pts.num, s->pts.den);
@@ -173,6 +180,9 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
     TelecineContext *s = ctx->priv;
     int i, len, ret = 0, nout = 0;
 
+    if (s->start_time < 0)
+        s->start_time = inpicref->pts;
+
     len = s->pattern[s->pattern_pos] - '0';
 
     s->pattern_pos++;
@@ -235,7 +245,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
             return AVERROR(ENOMEM);
         }
 
-        frame->pts = outlink->frame_count * s->ts_unit;
+        frame->pts = s->start_time + outlink->frame_count * s->ts_unit;
         ret = ff_filter_frame(outlink, frame);
     }
     av_frame_free(&inpicref);
-- 
1.9.1