[FFmpeg-devel] [PATCH 1/2] avformat/mxf: start to add mxf_inspect_mode and skip RIP if needed sponsored by nxtedition

[Marton Balint]

On Wed, 14 Aug 2024, Marc-Antoine Arnaud wrote:

> ---
> libavformat/mxfdec.c | 14 +++++++++++++-
> 1 file changed, 13 insertions(+), 1 deletion(-)

Why would you want to tune this?

Thanks,
Marton

>
> diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
> index a5863445ab5..df958819300 100644
> --- a/libavformat/mxfdec.c
> +++ b/libavformat/mxfdec.c
> @@ -321,6 +321,7 @@ typedef struct MXFContext {
>     int nb_index_tables;
>     MXFIndexTable *index_tables;
>     int eia608_extract;
> +    int mxf_inspect_mode;
> } MXFContext;
>
> /* NOTE: klv_offset is not set (-1) for local keys */
> @@ -3713,7 +3714,9 @@ static int mxf_read_header(AVFormatContext *s)
>         return AVERROR_INVALIDDATA;
>     mxf->run_in = run_in;
>
> -    mxf_read_random_index_pack(s);
> +    if (mxf->mxf_inspect_mode == 0) {
> +        mxf_read_random_index_pack(s);
> +    }
>
>     while (!avio_feof(s->pb)) {
>         const MXFMetadataReadTableEntry *metadata;
> @@ -4261,6 +4264,15 @@ static const AVOption options[] = {
>     { "eia608_extract", "extract eia 608 captions from s436m track",
>       offsetof(MXFContext, eia608_extract), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1,
>       AV_OPT_FLAG_DECODING_PARAM },
> +    { "mxf_inspect_mode", "the way to inspect MXF file",
> +      offsetof(MXFContext, mxf_inspect_mode), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1,
> +      AV_OPT_FLAG_DECODING_PARAM, .unit = "mxf_inspect_mode" },
> +    { "rip", "Parse RIP, then every body partition",
> +      0, AV_OPT_TYPE_CONST, {.i64 = 0}, INT_MIN, INT_MAX,
> +      AV_OPT_FLAG_DECODING_PARAM, .unit = "mxf_inspect_mode" },
> +    { "header", "Parse Header, first partition and next partitions if needed",
> +      0, AV_OPT_TYPE_CONST, {.i64 = 1}, INT_MIN, INT_MAX,
> +      AV_OPT_FLAG_DECODING_PARAM, .unit = "mxf_inspect_mode" },
>     { NULL },
> };
>
> -- 
> 2.39.3 (Apple Git-146)
>
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