vgmstream/src/meta/pos.c

#include "meta.h"

/* .pos - loop points for .wav [Ys I Complete (PC); reused for manual looping] */
VGMSTREAM * init_vgmstream_pos(STREAMFILE *streamFile) {
    VGMSTREAM * vgmstream = NULL;
    STREAMFILE * streamData = NULL;
    int32_t loop_start, loop_end;


    /* checks */
    if (!check_extensions(streamFile, "pos"))
        goto fail;
    if (get_streamfile_size(streamFile) != 0x08)
        goto fail;

    streamData = open_streamfile_by_ext(streamFile, "wav");
    if (streamData) {
        vgmstream = init_vgmstream_riff(streamData);
        if (!vgmstream) goto fail;
        vgmstream->meta_type = meta_RIFF_WAVE_POS;
    }
    else {
#ifdef VGM_USE_VORBIS
        /* hack for Ogg with external loops */
        streamData = open_streamfile_by_ext(streamFile, "ogg");
        if (streamData) {
            vgmstream = init_vgmstream_ogg_vorbis(streamData);
            if (!vgmstream) goto fail;
        }
        else {
            goto fail;
        }
#else
        goto fail;
#endif
    }

    close_streamfile(streamData);
    streamData = NULL;

    /* install loops (wrong values are validated later) */
    loop_start = read_32bitLE(0x00, streamFile);
    loop_end = read_32bitLE(0x04, streamFile);
    if (loop_end <= 0 || (loop_end > vgmstream->num_samples)) {
        loop_end = vgmstream->num_samples;
    }
    vgmstream_force_loop(vgmstream, 1, loop_start, loop_end);

    return vgmstream;

fail:
    close_streamfile(streamData);
    close_vgmstream(vgmstream);
    return NULL;
}