Function twin_decode_init

libavcodec/twinvq.c:1058–1095

}

static av_cold int twin_decode_init(AVCodecContext *avctx)
{
    TwinContext *tctx = avctx->priv_data;
    int isampf = avctx->sample_rate/1000;
    int ibps = avctx->bit_rate/(1000 * avctx->channels);

    tctx->avctx       = avctx;
    avctx->sample_fmt = SAMPLE_FMT_FLT;

    if (avctx->channels > 2) {
        av_log(avctx, AV_LOG_ERROR, "Unsupported number of channels: %i\n",
               avctx->channels);
        return -1;
    }

    switch ((isampf << 8) +  ibps) {
    case (8 <<8) +  8: tctx->mtab = &mode_08_08; break;
    case (11<<8) +  8: tctx->mtab = &mode_11_08; break;
    case (11<<8) + 10: tctx->mtab = &mode_11_10; break;
    case (16<<8) + 16: tctx->mtab = &mode_16_16; break;
    case (22<<8) + 20: tctx->mtab = &mode_22_20; break;
    case (22<<8) + 24: tctx->mtab = &mode_22_24; break;
    case (22<<8) + 32: tctx->mtab = &mode_22_32; break;
    case (44<<8) + 40: tctx->mtab = &mode_44_40; break;
    case (44<<8) + 48: tctx->mtab = &mode_44_48; break;
    default:
        av_log(avctx, AV_LOG_ERROR, "This version does not support %d kHz - %d kbit/s/ch mode.\n", isampf, isampf);
        return -1;
    }

    dsputil_init(&tctx->dsp, avctx);
    init_mdct_win(tctx);
    init_bitstream_params(tctx);

    memset_float(tctx->bark_hist[0][0], 0.1, FF_ARRAY_ELEMS(tctx->bark_hist));

    return 0;
}

static av_cold int twin_decode_close(AVCodecContext *avctx)
{