[FFmpeg-devel] [PATCH 1/3] decklink: add fourCC of display mode to list_format output

[Marton Balint]

On Thu, 16 Mar 2017, Matthias Hunstock wrote:

> ---
> libavdevice/decklink_common.cpp | 11 +++++++----
> 1 file changed, 7 insertions(+), 4 deletions(-)
>
> diff --git a/libavdevice/decklink_common.cpp b/libavdevice/decklink_common.cpp
> index 8b499c5..131d186 100644
> --- a/libavdevice/decklink_common.cpp
> +++ b/libavdevice/decklink_common.cpp
> @@ -276,6 +276,7 @@ int ff_decklink_list_formats(AVFormatContext *avctx, decklink_direction_t direct
>     struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
>     IDeckLinkDisplayModeIterator *itermode;
>     IDeckLinkDisplayMode *mode;
> +    char fourcc[32];
>     int i=0;
>     HRESULT res;
> 
> @@ -297,13 +298,15 @@ int ff_decklink_list_formats(AVFormatContext *avctx, decklink_direction_t direct
>             return AVERROR(EIO);
>     }
> 
> -    av_log(avctx, AV_LOG_INFO, "Supported formats for '%s':\n",
> +    av_log(avctx, AV_LOG_INFO, "Supported formats for '%s':\n\tmode\tfourCC\tdescription",
>                avctx->filename);
>     while (itermode->Next(&mode) == S_OK) {
>         BMDTimeValue tb_num, tb_den;
>         mode->GetFrameRate(&tb_num, &tb_den);
> -        av_log(avctx, AV_LOG_INFO, "\t%d\t%ldx%ld at %d/%d fps",
> -                ++i,mode->GetWidth(), mode->GetHeight(),
> +        av_get_codec_tag_string(fourcc, sizeof(fourcc), mode->GetDisplayMode());
> +        av_log(avctx, AV_LOG_INFO, "\n\t%d\t%c%c%c%c\t%ldx%ld at %d/%d fps",
> +                ++i, fourcc[3], fourcc[2], fourcc[1], fourcc[0],
> +                mode->GetWidth(), mode->GetHeight(),

fourcc is a string, is there a reason why you don't simply print it 
using "%s"?

>                 (int) tb_den, (int) tb_num);
>         switch (mode->GetFieldDominance()) {
>         case bmdLowerFieldFirst:
> @@ -311,9 +314,9 @@ int ff_decklink_list_formats(AVFormatContext *avctx, decklink_direction_t direct
>         case bmdUpperFieldFirst:
>         av_log(avctx, AV_LOG_INFO, " (interlaced, upper field first)"); break;
>         }
> -        av_log(avctx, AV_LOG_INFO, "\n");
>         mode->Release();
>     }
> +    av_log(avctx, AV_LOG_INFO, "\n");
>
>     itermode->Release();
>

Regards,
Marton