[FFmpeg-devel] [PATCH v7 3/3] avdevice/decklink_dec: export timecode with s12m side data

[lance.lmwang at gmail.com]

On Sat, Jul 11, 2020 at 07:13:31PM +0200, Marton Balint wrote:
> 
> 
> On Fri, 10 Jul 2020, lance.lmwang at gmail.com wrote:
> 
> > From: Limin Wang <lance.lmwang at gmail.com>
> > 
> > Signed-off-by: Limin Wang <lance.lmwang at gmail.com>
> > ---
> > libavdevice/decklink_dec.cpp | 16 ++++++++++++++++
> > 1 file changed, 16 insertions(+)
> > 
> > diff --git a/libavdevice/decklink_dec.cpp b/libavdevice/decklink_dec.cpp
> > index a499972..8adc00b 100644
> > --- a/libavdevice/decklink_dec.cpp
> > +++ b/libavdevice/decklink_dec.cpp
> > @@ -42,6 +42,7 @@ extern "C" {
> > #include "libavutil/imgutils.h"
> > #include "libavutil/intreadwrite.h"
> > #include "libavutil/time.h"
> > +#include "libavutil/timecode.h"
> > #include "libavutil/mathematics.h"
> > #include "libavutil/reverse.h"
> > #include "avdevice.h"
> > @@ -882,6 +883,21 @@ HRESULT decklink_input_callback::VideoInputFrameArrived(
> >                         AVDictionary* metadata_dict = NULL;
> >                         int metadata_len;
> >                         uint8_t* packed_metadata;
> > +                        AVTimecode tcr;
> > +
> > +                        if (av_timecode_init_from_string(&tcr, ctx->video_st->r_frame_rate, tc, ctx) >= 0) {
> > +                            uint32_t tc_data;
> > +                            uint8_t *sd;
> > +                            int size = sizeof(uint32_t) * 4;
> > +
> > +                            tc_data = av_timecode_get_smpte_from_framenum(&tcr, 0);
> > +                            sd = av_packet_new_side_data(&pkt, AV_PKT_DATA_S12M_TIMECODE, size);
> 
> You can put these two into the same line as the declaration if you
> initialize size first.

Sure, have updated the patch, please check it, thanks.

> 
> > +                            if (sd) {
> > +                                AV_WL32(sd, 1); // one TC ;
> > +                                AV_WL32(sd + 4, tc_data); // TC;
> > +                            }
> > +                        }
> > +
> 
> Regards,
> Marton
> 
> >                         if (av_dict_set(&metadata_dict, "timecode", tc, AV_DICT_DONT_STRDUP_VAL) >= 0) {
> >                             packed_metadata = av_packet_pack_dictionary(metadata_dict, &metadata_len);
> >                             av_dict_free(&metadata_dict);
> > -- 
> > 1.8.3.1
> > 
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-- 
Thanks,
Limin Wang