vgmstream/src/meta/nxa.c

#include "meta.h"
#include "../coding/coding.h"


/* Entergram NXA Opus [Higurashi no Naku Koro ni Hou (Switch)] */
VGMSTREAM * init_vgmstream_opus_nxa(STREAMFILE *streamFile) {
    VGMSTREAM * vgmstream = NULL;
    off_t start_offset;
    int loop_flag = 0, channel_count;
    size_t data_size, skip = 0;

    /* checks */
    if (!check_extensions(streamFile, "nxa"))
        goto fail;
    if (read_32bitBE(0x00, streamFile) != 0x4E584131) /* "NXA1" */
        goto fail;

    channel_count = read_16bitLE(0x10, streamFile);
    skip = read_16bitLE(0x16, streamFile);
    data_size = read_32bitLE(0x08, streamFile)-0x30;
    start_offset = 0x30;

    /* TODO: Determine if loop points are stored externally. No visible loop points in header */
    loop_flag = 0;


    /* build the VGMSTREAM */
    vgmstream = allocate_vgmstream(channel_count, loop_flag);
    if (!vgmstream) goto fail;

    vgmstream->meta_type = meta_NXA;
    vgmstream->num_samples = read_32bitLE(0x20, streamFile);
    vgmstream->sample_rate = read_32bitLE(0x0C, streamFile);

#ifdef VGM_USE_FFMPEG
    {
        vgmstream->codec_data = init_ffmpeg_switch_opus(streamFile, start_offset, data_size, vgmstream->channels, skip, vgmstream->sample_rate);
        if (!vgmstream->codec_data) goto fail;
        vgmstream->coding_type = coding_FFmpeg;
        vgmstream->layout_type = layout_none;

        if (vgmstream->num_samples == 0) {
            vgmstream->num_samples = switch_opus_get_samples(start_offset, data_size, streamFile) - skip;
        }
    }
#else
    goto fail;
#endif

    /* open the file for reading */
    if (!vgmstream_open_stream(vgmstream, streamFile, start_offset))
        goto fail;
    return vgmstream;

fail:
    close_vgmstream(vgmstream);
    return NULL;
}