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

[Marton Balint]

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.

> +                            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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