Esempio n. 1
0
static av_cold int decode_init(AVCodecContext * avctx) {
    NellyMoserDecodeContext *s = avctx->priv_data;

    s->avctx = avctx;
    av_lfg_init(&s->random_state, 0);
    ff_mdct_init(&s->imdct_ctx, 8, 1, 1.0);

    dsputil_init(&s->dsp, avctx);

    if (avctx->request_sample_fmt == AV_SAMPLE_FMT_FLT) {
        s->scale_bias = 1.0/(32768*8);
        avctx->sample_fmt = AV_SAMPLE_FMT_FLT;
    } else {
        s->scale_bias = 1.0/(1*8);
        avctx->sample_fmt = AV_SAMPLE_FMT_S16;
        ff_fmt_convert_init(&s->fmt_conv, avctx);
        s->float_buf = av_mallocz(NELLY_SAMPLES * sizeof(*s->float_buf));
        if (!s->float_buf) {
            av_log(avctx, AV_LOG_ERROR, "error allocating float buffer\n");
            return AVERROR(ENOMEM);
        }
    }

    /* Generate overlap window */
    if (!ff_sine_128[127])
        ff_init_ff_sine_windows(7);

    avctx->channel_layout = AV_CH_LAYOUT_MONO;

    avcodec_get_frame_defaults(&s->frame);
    avctx->coded_frame = &s->frame;

    return 0;
}
Esempio n. 2
0
static av_cold int decode_init(AVCodecContext * avctx) {
    NellyMoserDecodeContext *s = avctx->priv_data;

    s->avctx = avctx;
    av_lfg_init(&s->random_state, 0);
    ff_mdct_init(&s->imdct_ctx, 8, 1, 1.0);

    dsputil_init(&s->dsp, avctx);
    ff_fmt_convert_init(&s->fmt_conv, avctx);

    s->scale_bias = 1.0/(1*8);

    /* Generate overlap window */
    if (!ff_sine_128[127])
        ff_init_ff_sine_windows(7);

    avctx->sample_fmt = AV_SAMPLE_FMT_S16;
    avctx->channel_layout = AV_CH_LAYOUT_MONO;
    return 0;
}