vgmstream/src/meta/ngc_pdt.c

#include "meta.h"
#include "../util.h"

/* PDT - Custom Generated File (Mario Party) */
VGMSTREAM * init_vgmstream_ngc_pdt(STREAMFILE *streamFile) {
    VGMSTREAM * vgmstream = NULL;
    char filename[260];
    off_t start_offset;
    int loop_flag;
	int channel_count;

    /* check extension, case insensitive */
    streamFile->get_name(streamFile,filename,sizeof(filename));
    if (strcasecmp("pdt",filename_extension(filename))) goto fail;

#if 0
    /* check header */
    if (read_32bitBE(0x00,streamFile) != 0x00000000) /* 0x0 */
        goto fail;
#endif

    loop_flag = (read_32bitBE(0x0C,streamFile)!=2); /* not sure, but it seems unlooped = 2 */
    channel_count = 2;
    
	/* build the VGMSTREAM */
    vgmstream = allocate_vgmstream(channel_count,loop_flag);
    if (!vgmstream) goto fail;

	/* fill in the vital statistics */
    start_offset = 0x60;
	vgmstream->channels = channel_count;
    vgmstream->sample_rate = read_32bitBE(0x04,streamFile);
    vgmstream->coding_type = coding_NGC_DSP;
    vgmstream->num_samples = read_32bitBE(0x08,streamFile)*14/8/channel_count;
    if (loop_flag) {
        vgmstream->loop_start_sample = read_32bitBE(0x0C,streamFile)*14/8/channel_count;
        vgmstream->loop_end_sample = read_32bitBE(0x08,streamFile)*14/8/channel_count;
    }

	/* dealing with no interleave, 'cause the interleave
	for 2 channels is larger than the sample count/2 */
	vgmstream->layout_type = layout_none;
    vgmstream->meta_type = meta_NGC_PDT;


    if (vgmstream->coding_type == coding_NGC_DSP) {
        int i;
        for (i=0;i<16;i++) {
            vgmstream->ch[0].adpcm_coef[i] = read_16bitBE(0x20+i*2,streamFile);
        }
        if (vgmstream->channels == 2) {
            for (i=0;i<16;i++) {
                vgmstream->ch[1].adpcm_coef[i] = read_16bitBE(0x40+i*2,streamFile);
            }
        }
    }

    /* open the file for reading */
    {
        int i;
        STREAMFILE * file;
        file = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
        if (!file) goto fail;
        for (i=0;i<channel_count;i++) {
            vgmstream->ch[i].streamfile = file;

            vgmstream->ch[i].channel_start_offset=
                vgmstream->ch[i].offset=(get_streamfile_size(streamFile)+start_offset)/2*i;

        }
    }

    return vgmstream;

    /* clean up anything we may have opened */
fail:
    if (vgmstream) close_vgmstream(vgmstream);
    return NULL;
}