[FFmpeg-devel] [PATCH] avfilter/tremolo: fix wavetable buffer size

[Paul B Mahol]

On 10/29/15, Kyle Swanson <k at ylo.ph> wrote:
> Signed-off-by: Kyle Swanson <k at ylo.ph>
> ---
>  libavfilter/af_tremolo.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/libavfilter/af_tremolo.c b/libavfilter/af_tremolo.c
> index 50df2e4..572e9e3 100644
> --- a/libavfilter/af_tremolo.c
> +++ b/libavfilter/af_tremolo.c
> @@ -72,7 +72,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
>          dst += channels;
>          src += channels;
>          s->index++;
> -        if (s->index >= inlink->sample_rate)
> +        if (s->index >= inlink->sample_rate / s->freq)
>              s->index = 0;
>      }
>
> @@ -125,11 +125,11 @@ static int config_input(AVFilterLink *inlink)
>      const double offset = 1. - s->depth / 2.;
>      int i;
>
> -    s->table = av_malloc_array(inlink->sample_rate, sizeof(*s->table));
> +    s->table = av_malloc_array(inlink->sample_rate / s->freq,
> sizeof(*s->table));
>      if (!s->table)
>          return AVERROR(ENOMEM);
>
> -    for (i = 0; i < inlink->sample_rate; i++) {
> +    for (i = 0; i < inlink->sample_rate / s->freq; i++) {
>          double env = s->freq * i / inlink->sample_rate;
>          env = sin(2 * M_PI * fmod(env + 0.25, 1.0));
>          s->table[i] = env * (1 - fabs(offset)) + offset;
> --
> 2.6.2
>
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>

probably ok