[FFmpeg-devel] [PATCH 12/19] avfilter/af_afir: Avoid allocating AVFilterPad names

[Paul B Mahol]

On 8/25/20, Andreas Rheinhardt <andreas.rheinhardt at gmail.com> wrote:
> If the names are always the same, they need not be duplicated; doing so
> saves allocations, checks for the allocations as well as frees.
>
> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>
> ---
>  libavfilter/af_afir.c | 30 +++++++-----------------------
>  1 file changed, 7 insertions(+), 23 deletions(-)
>

LGTM

> diff --git a/libavfilter/af_afir.c b/libavfilter/af_afir.c
> index 4e76bda4a3..d128f4bce7 100644
> --- a/libavfilter/af_afir.c
> +++ b/libavfilter/af_afir.c
> @@ -800,11 +800,9 @@ static av_cold void uninit(AVFilterContext *ctx)
>          av_frame_free(&s->ir[i]);
>      }
>
> -    for (int i = 0; i < ctx->nb_inputs; i++)
> +    for (unsigned i = 1; i < ctx->nb_inputs; i++)
>          av_freep(&ctx->input_pads[i].name);
>
> -    for (int i = 0; i < ctx->nb_outputs; i++)
> -        av_freep(&ctx->output_pads[i].name);
>      av_frame_free(&s->video);
>  }
>
> @@ -842,18 +840,13 @@ static av_cold int init(AVFilterContext *ctx)
>      int ret;
>
>      pad = (AVFilterPad) {
> -        .name = av_strdup("main"),
> +        .name = "main",
>          .type = AVMEDIA_TYPE_AUDIO,
>      };
>
> -    if (!pad.name)
> -        return AVERROR(ENOMEM);
> -
>      ret = ff_insert_inpad(ctx, 0, &pad);
> -    if (ret < 0) {
> -        av_freep(&pad.name);
> +    if (ret < 0)
>          return ret;
> -    }
>
>      for (int n = 0; n < s->nb_irs; n++) {
>          pad = (AVFilterPad) {
> @@ -872,34 +865,25 @@ static av_cold int init(AVFilterContext *ctx)
>      }
>
>      pad = (AVFilterPad) {
> -        .name          = av_strdup("default"),
> +        .name          = "default",
>          .type          = AVMEDIA_TYPE_AUDIO,
>          .config_props  = config_output,
>      };
>
> -    if (!pad.name)
> -        return AVERROR(ENOMEM);
> -
>      ret = ff_insert_outpad(ctx, 0, &pad);
> -    if (ret < 0) {
> -        av_freep(&pad.name);
> +    if (ret < 0)
>          return ret;
> -    }
>
>      if (s->response) {
>          vpad = (AVFilterPad){
> -            .name         = av_strdup("filter_response"),
> +            .name         = "filter_response",
>              .type         = AVMEDIA_TYPE_VIDEO,
>              .config_props = config_video,
>          };
> -        if (!vpad.name)
> -            return AVERROR(ENOMEM);
>
>          ret = ff_insert_outpad(ctx, 1, &vpad);
> -        if (ret < 0) {
> -            av_freep(&vpad.name);
> +        if (ret < 0)
>              return ret;
> -        }
>      }
>
>      s->fdsp = avpriv_float_dsp_alloc(0);
> --
> 2.20.1
>
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