Am So., 28. Juni 2020 um 16:43 Uhr schrieb <[email protected]>:
>
> From: Gautam Ramakrishnan <[email protected]>
>
> This patch adds support to demux pgx file
> format.
Has anything changed compared to earlier versions?
> ---
> libavformat/allformats.c | 1 +
> libavformat/img2dec.c | 10 ++++++++++
> libavformat/version.h | 2 +-
> 3 files changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/libavformat/allformats.c b/libavformat/allformats.c
> index 97fd06debb..f8527b1fd4 100644
> --- a/libavformat/allformats.c
> +++ b/libavformat/allformats.c
> @@ -488,6 +488,7 @@ extern AVInputFormat ff_image_pbm_pipe_demuxer;
> extern AVInputFormat ff_image_pcx_pipe_demuxer;
> extern AVInputFormat ff_image_pgmyuv_pipe_demuxer;
> extern AVInputFormat ff_image_pgm_pipe_demuxer;
> +extern AVInputFormat ff_image_pgx_pipe_demuxer;
> extern AVInputFormat ff_image_pictor_pipe_demuxer;
> extern AVInputFormat ff_image_png_pipe_demuxer;
> extern AVInputFormat ff_image_ppm_pipe_demuxer;
> diff --git a/libavformat/img2dec.c b/libavformat/img2dec.c
> index ee7ceed08f..ec27e04a30 100644
> --- a/libavformat/img2dec.c
> +++ b/libavformat/img2dec.c
> @@ -1000,6 +1000,15 @@ static int pgmyuv_probe(const AVProbeData *p) //
> custom FFmpeg format recognized
> return ret && av_match_ext(p->filename, "pgmyuv") ? ret : 0;
> }
>
> +static int pgx_probe(const AVProbeData *p)
> +{
> + const uint8_t *b = p->buf;
> + int ret = (AV_RB64(b) & 0xFFFFFFFFFFFF0000) == 0x5047204D4C200000;
> + if (ret)
> + return AVPROBE_SCORE_EXTENSION + 1;
> + return 0;
Why is the variable ret useful?
Carl Eugen
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