[FFmpeg-devel] [PATCH 2/4] API: add AV_PKT_DATA_S12M_TIMECODE to AVPacketSideDataType

[Andreas Rheinhardt]

lance.lmwang at gmail.com:
> From: Limin Wang <lance.lmwang at gmail.com>
> 
> Signed-off-by: Limin Wang <lance.lmwang at gmail.com>
> ---
>  doc/APIchanges        |  3 +++
>  libavcodec/avpacket.c |  1 +
>  libavcodec/decode.c   |  1 +
>  libavcodec/packet.h   |  8 ++++++++
>  libavcodec/version.h  |  2 +-
>  libavformat/dump.c    | 22 ++++++++++++++++++++++
>  6 files changed, 36 insertions(+), 1 deletion(-)
> 
> diff --git a/doc/APIchanges b/doc/APIchanges
> index 1d6cc36..7cad7fa 100644
> --- a/doc/APIchanges
> +++ b/doc/APIchanges
> @@ -15,6 +15,9 @@ libavutil:     2017-10-21
>  
>  API changes, most recent first:
>  
> +2020-06-xx - xxxxxxxxxx - lavc 58.94.100 - packet.h
> +  Add AV_PKT_DATA_S12M_TIMECODE.
> +
>  2020-06-12 - b09fb030c1 - lavu 56.55.100 - pixdesc.h
>    Add AV_PIX_FMT_X2RGB10.
>  
> diff --git a/libavcodec/avpacket.c b/libavcodec/avpacket.c
> index dce26cb..a4316a7 100644
> --- a/libavcodec/avpacket.c
> +++ b/libavcodec/avpacket.c
> @@ -400,6 +400,7 @@ const char *av_packet_side_data_name(enum AVPacketSideDataType type)
>      case AV_PKT_DATA_PRFT:                       return "Producer Reference Time";
>      case AV_PKT_DATA_ICC_PROFILE:                return "ICC Profile";
>      case AV_PKT_DATA_DOVI_CONF:                  return "DOVI configuration record";
> +    case AV_PKT_DATA_S12M_TIMECODE:              return "SMPTE 12-1 timecode";
>      }
>      return NULL;
>  }
> diff --git a/libavcodec/decode.c b/libavcodec/decode.c
> index a4e50c0..a2bf0cc 100644
> --- a/libavcodec/decode.c
> +++ b/libavcodec/decode.c
> @@ -1699,6 +1699,7 @@ int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame)
>          { AV_PKT_DATA_CONTENT_LIGHT_LEVEL,        AV_FRAME_DATA_CONTENT_LIGHT_LEVEL },
>          { AV_PKT_DATA_A53_CC,                     AV_FRAME_DATA_A53_CC },
>          { AV_PKT_DATA_ICC_PROFILE,                AV_FRAME_DATA_ICC_PROFILE },
> +        { AV_PKT_DATA_S12M_TIMECODE,              AV_FRAME_DATA_S12M_TIMECODE },
>      };
>  
>      if (pkt) {
> diff --git a/libavcodec/packet.h b/libavcodec/packet.h
> index 41485f4..72cb4f7 100644
> --- a/libavcodec/packet.h
> +++ b/libavcodec/packet.h
> @@ -283,6 +283,14 @@ enum AVPacketSideDataType {
>      AV_PKT_DATA_DOVI_CONF,
>  
>      /**
> +     * Timecode which conforms to SMPTE ST 12-1. The data is an array of 4 uint32_t
> +     * where the first uint32_t describes how many (1-3) of the other timecodes are used.
> +     * The timecode format is described in the av_timecode_get_smpte_from_framenum()
> +     * function in libavutil/timecode.c.

The format is documented in a C source file, not a public header? Sure
about that?

> +     */
> +    AV_PKT_DATA_S12M_TIMECODE,
> +
> +    /**
>       * The number of side data types.
>       * This is not part of the public API/ABI in the sense that it may
>       * change when new side data types are added.
> diff --git a/libavcodec/version.h b/libavcodec/version.h
> index 0359302..482cc6d 100644
> --- a/libavcodec/version.h
> +++ b/libavcodec/version.h
> @@ -28,7 +28,7 @@
>  #include "libavutil/version.h"
>  
>  #define LIBAVCODEC_VERSION_MAJOR  58
> -#define LIBAVCODEC_VERSION_MINOR  93
> +#define LIBAVCODEC_VERSION_MINOR  94
>  #define LIBAVCODEC_VERSION_MICRO 100
>  
>  #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
> diff --git a/libavformat/dump.c b/libavformat/dump.c
> index 117c681..c5f0bd6 100644
> --- a/libavformat/dump.c
> +++ b/libavformat/dump.c
> @@ -34,6 +34,7 @@
>  #include "libavutil/replaygain.h"
>  #include "libavutil/spherical.h"
>  #include "libavutil/stereo3d.h"
> +#include "libavutil/timecode.h"
>  
>  #include "avformat.h"
>  
> @@ -402,6 +403,23 @@ static void dump_dovi_conf(void *ctx, AVPacketSideData* sd)
>             dovi->dv_bl_signal_compatibility_id);
>  }
>  
> +static void dump_s12m_timecode(void *ctx, AVPacketSideData* sd)
> +{
> +    uint32_t *tc = (uint32_t*)sd->data;
> +    int m = tc[0] & 3;
> +
> +    if (sd->size != sizeof(uint32_t) * 4) {
> +        av_log(ctx, AV_LOG_ERROR, "invalid data");
> +        return;
> +    }
> +
> +    for (int j = 1; j <= m; j++) {
> +        char tcbuf[AV_TIMECODE_STR_SIZE];
> +        av_timecode_make_smpte_tc_string(tcbuf, tc[j], 0);
> +        av_log(ctx, AV_LOG_INFO, "timecode - %s%s", tcbuf, j != m ? ", " : "");
> +    }
> +}
> +
>  static void dump_sidedata(void *ctx, AVStream *st, const char *indent)
>  {
>      int i;
> @@ -468,6 +486,10 @@ static void dump_sidedata(void *ctx, AVStream *st, const char *indent)
>              av_log(ctx, AV_LOG_INFO, "DOVI configuration record: ");
>              dump_dovi_conf(ctx, &sd);
>              break;
> +        case AV_PKT_DATA_S12M_TIMECODE:
> +            av_log(ctx, AV_LOG_INFO, "S12M timecode: ");
> +            dump_s12m_timecode(ctx, &sd);
> +            break;
>          default:
>              av_log(ctx, AV_LOG_INFO,
>                     "unknown side data type %d (%d bytes)", sd.type, sd.size);
>