vgmstream/src/meta/idsp.c

#include "meta.h"

//todo cleanup

/* "idsp" - from Namco's Wii NUB archives [Soul Calibur Legends (Wii), Sky Crawlers: Innocent Aces (Wii)] */
VGMSTREAM * init_vgmstream_nub_idsp(STREAMFILE *streamFile) {
    VGMSTREAM * vgmstream = NULL;
    char filename[PATH_LIMIT];
    int loop_flag;
    int channel_count;
    int i, j;
    off_t start_offset;

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

    /* check header */
    if (read_32bitBE(0x00,streamFile) != 0x69647370 ||  /* "idsp" */
        read_32bitBE(0xBC,streamFile) != 0x49445350)    /* "IDSP" */
        goto fail;

    loop_flag = read_32bitBE(0x20,streamFile);
    channel_count = read_32bitBE(0xC4,streamFile);
    
    if (channel_count > 8)
        goto fail;


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

    start_offset = (channel_count * 0x60) + 0x100;
    vgmstream->sample_rate = read_32bitBE(0xC8,streamFile);
    vgmstream->coding_type = coding_NGC_DSP;
    vgmstream->num_samples = (read_32bitBE(0x14,streamFile))*14/8/channel_count;
    if (loop_flag) {
        vgmstream->loop_start_sample = (read_32bitBE(0xD0,streamFile));
        vgmstream->loop_end_sample = (read_32bitBE(0xD4,streamFile));
    }

    if (channel_count == 1) {
        vgmstream->layout_type = layout_none;
    }
    else if (channel_count > 1) {
        if (read_32bitBE(0xD8,streamFile) == 0) {
              vgmstream->layout_type = layout_none;
              vgmstream->interleave_block_size = (get_streamfile_size(streamFile)-start_offset)/2;
        }
        else if (read_32bitBE(0xD8,streamFile) > 0) {
              vgmstream->layout_type = layout_interleave;
              vgmstream->interleave_block_size = read_32bitBE(0xD8,streamFile);
        }
    }

    vgmstream->meta_type = meta_NUB_IDSP;

    {
        if (vgmstream->coding_type == coding_NGC_DSP) {
            off_t coef_table[8] = {0x118,0x178,0x1D8,0x238,0x298,0x2F8,0x358,0x3B8};
            for (j=0;j<vgmstream->channels;j++) {
                for (i=0;i<16;i++) {
                    vgmstream->ch[j].adpcm_coef[i] = read_16bitBE(coef_table[j]+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=start_offset+
                vgmstream->interleave_block_size*i;

        }
    }


    return vgmstream;

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

/* IDSP - from Inevitable Entertainment games [Defender (GC)] */
VGMSTREAM * init_vgmstream_idsp_ie(STREAMFILE *streamFile) {
    VGMSTREAM * vgmstream = NULL;
    char filename[PATH_LIMIT];
    int loop_flag = 0;
    int channel_count;
    off_t start_offset;

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

    /* check header */
    if (read_32bitBE(0x00,streamFile) != 0x49445350) /* "IDSP" */
        goto fail;

    channel_count = read_32bitBE(0x0C,streamFile);
    
    if (channel_count > 2) // Refuse everything else for now
        goto fail;

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

    start_offset = 0x70;
    vgmstream->sample_rate = read_32bitBE(0x08,streamFile);
    vgmstream->coding_type = coding_NGC_DSP;
    vgmstream->num_samples = read_32bitBE(0x04,streamFile)/channel_count/8*14;
    if (loop_flag) {
        vgmstream->loop_start_sample = 0;
        vgmstream->loop_end_sample = read_32bitBE(0x04,streamFile)/channel_count/8*14;
    }

    if (channel_count == 1) {
        vgmstream->layout_type = layout_none;
    }
    else {
        vgmstream->layout_type = layout_interleave;
        vgmstream->interleave_block_size = read_32bitBE(0x10,streamFile);
    }
    
    vgmstream->meta_type = meta_IDSP_IE;

    {
        int i;
        for (i=0;i<16;i++)
            vgmstream->ch[0].adpcm_coef[i] = read_16bitBE(0x14+i*2,streamFile);
        if (channel_count == 2) {
            for (i=0;i<16;i++)
                vgmstream->ch[1].adpcm_coef[i] = read_16bitBE(0x42+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=start_offset+
                vgmstream->interleave_block_size*i;

        }
    }

    return vgmstream;

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