Function hb_audio_resample_update

libhb/audio_resample.c:145–226

}

int hb_audio_resample_update(hb_audio_resample_t *resample)
{
    if (resample == NULL)
    {
        hb_error("hb_audio_resample_update: resample is NULL");
        return 1;
    }

    int ret, resample_changed;

    resample->resample_needed =
        (resample->out.sample_fmt != resample->in.sample_fmt ||
         resample->out.sample_rate != resample->in.sample_rate ||
         av_channel_layout_compare(&resample->out.ch_layout, &resample->in.ch_layout));

    resample_changed =
        (resample->resample_needed &&
         (resample->resample.sample_fmt != resample->in.sample_fmt ||
          resample->resample.sample_rate != resample->in.sample_rate ||
          av_channel_layout_compare(&resample->resample.ch_layout, &resample->in.ch_layout) ||
          resample->resample.lfe_mix_level != resample->in.lfe_mix_level ||
          resample->resample.center_mix_level != resample->in.center_mix_level ||
          resample->resample.surround_mix_level != resample->in.surround_mix_level));

    if (resample_changed || (resample->resample_needed &&
                             resample->swresample == NULL))
    {
        if (resample->swresample == NULL)
        {
            resample->swresample = swr_alloc();
            if (resample->swresample == NULL)
            {
                hb_error("hb_audio_resample_update: swr_alloc() failed");
                return 1;
            }

            av_opt_set_int(resample->swresample, "out_sample_fmt",
                           resample->out.sample_fmt, 0);
            av_opt_set_int(resample->swresample, "out_sample_rate",
                           resample->out.sample_rate, 0);
            av_opt_set_chlayout(resample->swresample, "out_chlayout",
                           &resample->out.ch_layout, 0);
            av_opt_set_int(resample->swresample, "matrix_encoding",
                           resample->out.matrix_encoding, 0);
            av_opt_set_double(resample->swresample, "rematrix_maxval",
                              resample->out.maxval, 0);
        }

        av_opt_set_int(resample->swresample, "in_sample_fmt",
                       resample->in.sample_fmt, 0);
        av_opt_set_int(resample->swresample, "in_sample_rate",
                       resample->in.sample_rate, 0);
        av_opt_set_chlayout(resample->swresample, "in_chlayout",
                       &resample->in.ch_layout, 0);
        av_opt_set_double(resample->swresample, "lfe_mix_level",
                          resample->in.lfe_mix_level, 0);
        av_opt_set_double(resample->swresample, "center_mix_level",
                          resample->in.center_mix_level, 0);