[FFmpeg-devel] [PATCH v6 3/3] avdevice/decklink_dec: export timecode with s12m side data

[lance.lmwang at gmail.com]

On Wed, Jul 01, 2020 at 09:39:58PM +0800, 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 82106aa..0fc1489 100644
> --- a/libavdevice/decklink_dec.cpp
> +++ b/libavdevice/decklink_dec.cpp
> @@ -41,6 +41,7 @@ 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"
> @@ -778,6 +779,21 @@ HRESULT decklink_input_callback::VideoInputFrameArrived(
>                          AVDictionary* metadata_dict = NULL;
>                          int metadata_len;
>                          uint8_t* packed_metadata;
> +                        AVTimecode tcr;
> +                        uint32_t tc_data;
> +                        uint8_t *sd;
> +                        int size = sizeof(uint32_t) * 4;
> +
> +                        if (av_timecode_init_from_string(&tcr, ctx->video_st->r_frame_rate, tc, ctx) >= 0) {
> +                            if ((tc_data = av_timecode_get_smpte_from_framenum(&tcr, 0)) > 0) {
> +                                sd = av_packet_new_side_data(&pkt, AV_PKT_DATA_S12M_TIMECODE, size);
> +                                if (sd) {
> +                                    AV_WL32(sd, 1); // one TC ;
> +                                    AV_WL32(sd + 4, tc_data); // TC;
> +                                }
> +                            }
> +                        }
> +
>                          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
> 

Marton, please help to review and give comments. 

-- 
Thanks,
Limin Wang