Function encode_init

libavcodec/nellymoserenc.c:170–205

}

static av_cold int encode_init(AVCodecContext *avctx)
{
    static AVOnce init_static_once = AV_ONCE_INIT;
    NellyMoserEncodeContext *s = avctx->priv_data;
    float scale = 32768.0;
    int ret;

    if (avctx->sample_rate != 8000 && avctx->sample_rate != 16000 &&
        avctx->sample_rate != 11025 &&
        avctx->sample_rate != 22050 && avctx->sample_rate != 44100 &&
        avctx->strict_std_compliance >= FF_COMPLIANCE_NORMAL) {
        av_log(avctx, AV_LOG_ERROR, "Nellymoser works only with 8000, 16000, 11025, 22050 and 44100 sample rate\n");
        return AVERROR(EINVAL);
    }

    avctx->frame_size = NELLY_SAMPLES;
    avctx->initial_padding = NELLY_BUF_LEN;
    ff_af_queue_init(avctx, &s->afq);
    s->avctx = avctx;
    if ((ret = av_tx_init(&s->mdct_ctx, &s->mdct_fn, AV_TX_FLOAT_MDCT, 0, 128, &scale, 0)) < 0)
        return ret;
    s->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
    if (!s->fdsp)
        return AVERROR(ENOMEM);

    if (s->avctx->trellis) {
        s->opt  = av_malloc(NELLY_BANDS * OPT_SIZE * sizeof(float  ));
        s->path = av_malloc(NELLY_BANDS * OPT_SIZE * sizeof(uint8_t));
        if (!s->opt || !s->path)
            return AVERROR(ENOMEM);
    }

    ff_thread_once(&init_static_once, nellymoser_init_static);

    return 0;
}

#define find_best(val, table, LUT, LUT_add, LUT_size) \
    best_idx = \