Function alp_write_header

libavformat/alp.c:210–224

}

static int alp_write_header(AVFormatContext *s)
{
    ALPMuxContext *alp = s->priv_data;
    AVCodecParameters *par = s->streams[0]->codecpar;

    avio_wl32(s->pb,  ALP_TAG);
    avio_wl32(s->pb,  alp->type == ALP_TYPE_PCM ? 12 : 8);
    avio_write(s->pb, "ADPCM", 6);
    avio_w8(s->pb,    0);
    avio_w8(s->pb,    par->ch_layout.nb_channels);
    if (alp->type == ALP_TYPE_PCM)
        avio_wl32(s->pb, par->sample_rate);

    return 0;
}

enum { AE = AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM };