Function mlp_encode_init

libavcodec/mlpenc.c:481–661

}

static av_cold int mlp_encode_init(AVCodecContext *avctx)
{
    static AVOnce init_static_once = AV_ONCE_INIT;
    MLPEncodeContext *ctx = avctx->priv_data;
    uint64_t channels_present;
    int ret;

    ctx->avctx = avctx;

    switch (avctx->sample_rate) {
    case 44100 << 0:
        avctx->frame_size         = 40  << 0;
        ctx->coded_sample_rate[0] = 0x08 + 0;
        ctx->fs                   = 0x08 + 1;
        break;
    case 44100 << 1:
        avctx->frame_size         = 40  << 1;
        ctx->coded_sample_rate[0] = 0x08 + 1;
        ctx->fs                   = 0x0C + 1;
        break;
    case 44100 << 2:
        ctx->substream_info      |= SUBSTREAM_INFO_HIGH_RATE;
        avctx->frame_size         = 40  << 2;
        ctx->coded_sample_rate[0] = 0x08 + 2;
        ctx->fs                   = 0x10 + 1;
        break;
    case 48000 << 0:
        avctx->frame_size         = 40  << 0;
        ctx->coded_sample_rate[0] = 0x00 + 0;
        ctx->fs                   = 0x08 + 2;
        break;
    case 48000 << 1:
        avctx->frame_size         = 40  << 1;
        ctx->coded_sample_rate[0] = 0x00 + 1;
        ctx->fs                   = 0x0C + 2;
        break;
    case 48000 << 2:
        ctx->substream_info      |= SUBSTREAM_INFO_HIGH_RATE;
        avctx->frame_size         = 40  << 2;
        ctx->coded_sample_rate[0] = 0x00 + 2;
        ctx->fs                   = 0x10 + 2;
        break;
    default:
        av_unreachable("Checked via CODEC_SAMPLERATES");
    }
    ctx->coded_sample_rate[1] = -1 & 0xf;

    ctx->coded_peak_bitrate = mlp_peak_bitrate(9600000, avctx->sample_rate);

    ctx->substream_info |= SUBSTREAM_INFO_ALWAYS_SET;
    if (avctx->ch_layout.nb_channels <= 2)
        ctx->substream_info |= SUBSTREAM_INFO_MAX_2_CHAN;

    switch (avctx->sample_fmt) {
    case AV_SAMPLE_FMT_S16P:
        ctx->coded_sample_fmt[0] = BITS_16;
        ctx->wordlength = 16;
        avctx->bits_per_raw_sample = 16;