vgmstream/src/meta/emff.c

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

/* EMFF - Eidos Music File Format (PS2),
Legacy of Kain - Defiance, possibly more... */
VGMSTREAM * init_vgmstream_emff_ps2(STREAMFILE *streamFile) {
    VGMSTREAM * vgmstream = NULL;
    char filename[PATH_LIMIT];
    off_t start_offset;
    int loop_flag = 0;
    int channel_count;
    int frequency;
    int i;

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

    /* do some checks on the file, cause we	have no magic words to check the header...
    it seems if 0x800 and 0x804 = 0 then the file has only audio, if 0x800 = 1
    it has a text section, if both are 1 it's video with a text section included... */
    if (read_32bitBE(0x800,streamFile) == 0x01000000	|| /* "0x01000000" */
        read_32bitBE(0x804,streamFile) == 0x01000000)	/* "0x01000000" */
    goto fail;

    frequency = read_32bitLE(0x0,streamFile);
    channel_count = read_32bitLE(0xC,streamFile);

    if (frequency > 48000 ||
        channel_count > 8) {
        goto fail;
    }

    loop_flag = (read_32bitLE(0x4,streamFile) != 0xFFFFFFFF);
    
    /* build the VGMSTREAM */
    vgmstream = allocate_vgmstream(channel_count,loop_flag);
    if (!vgmstream) goto fail;

    /* fill in the vital statistics */
    start_offset = 0x800;
    vgmstream->sample_rate = frequency;
    vgmstream->channels = channel_count;
    vgmstream->coding_type = coding_PSX;

    vgmstream->layout_type = layout_blocked_emff_ps2;
    vgmstream->interleave_block_size = 0x10;
    vgmstream->meta_type = meta_EMFF_PS2;

    /* open the file for reading */
    {
        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;
        }
    }

    /* Calc num_samples */
    block_update_emff_ps2(start_offset,vgmstream);
    vgmstream->num_samples = read_32bitLE(0x8,streamFile);
    if (loop_flag) {
        vgmstream->loop_start_sample = (read_32bitLE(0x28,streamFile)-start_offset)*28/16/channel_count;
        vgmstream->loop_end_sample = read_32bitLE(0x8,streamFile);
    }

    return vgmstream;

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


/* EMFF - Eidos Music File Format (NGC/WII),
found in Tomb Raider Legend/Anniversary/Underworld, possibly more... */
VGMSTREAM * init_vgmstream_emff_ngc(STREAMFILE *streamFile) {
    VGMSTREAM * vgmstream = NULL;
    char filename[PATH_LIMIT];
    off_t start_offset;
    int loop_flag = 0;
    int channel_count;
    int frequency;
    int i;
    int j;

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

    /* do some checks on the file, cause we	have no magic words to check the header...
    it seems if 0x800 and 0x804 = 0 then the file has only audio, if 0x800 = 1
    it has a text section, if both are 1 it's video with a text section included... */
    if (read_32bitBE(0x800,streamFile) == 0x00000001 ||	/* "0x00000001" */
        read_32bitBE(0x804,streamFile) == 0x00000001)	/* "0x00000001" */
    goto fail;

    frequency = read_32bitBE(0x0,streamFile);
    channel_count = read_32bitBE(0xC,streamFile);

    if (frequency > 48000 ||
        channel_count > 8) {
        goto fail;
    }

    loop_flag = (read_32bitBE(0x4,streamFile) != 0xFFFFFFFF);

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

    /* fill in the vital statistics */
    start_offset = 0x800;
    vgmstream->sample_rate = frequency;
    vgmstream->channels = channel_count;
    vgmstream->coding_type = coding_NGC_DSP;

    /* Retrieving coefs and loops, depending on the file layout... */
    /* Found in Tomb Raider - Legend for GameCube */
    if (read_32bitBE(0xC8,streamFile) > 0x0) {
        off_t coef_table[8] = {0xC8,0xF6,0x124,0x152,0x180,0x1AE,0x1DC,0x20A};
        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);
            }
        }
    /* Found in Tomb Raider - Anniversary for WII */
    } else if (read_32bitBE(0xCC,streamFile) > 0x0) {
        off_t coef_table[8] = {0xCC,0xFA,0x128,0x156,0x184,0x1B2,0x1E0,0x20E};
        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);
    }
}   
    /* Found in Tomb Raider - Underworld for WII */
    } else if (read_32bitBE(0x2D0,streamFile) > 0x0) {
        off_t coef_table[8] = {0x2D0,0x2FE,0x32C,0x35A,0x388,0x3B6,0x3E4,0x412};
        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);
    }
} 

    } else {
        goto fail;
    }

    vgmstream->layout_type = layout_blocked_emff_ngc;
    vgmstream->interleave_block_size = 0x10;
    vgmstream->meta_type = meta_EMFF_NGC;

    /* open the file for reading */
    {
        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;
        }
    }

    /* Calc num_samples */
    block_update_emff_ngc(start_offset,vgmstream);
    vgmstream->num_samples = read_32bitBE(0x8,streamFile);;
    if (loop_flag) {
        vgmstream->loop_start_sample = (read_32bitBE(0x28,streamFile))*14/8/channel_count;
        vgmstream->loop_end_sample = read_32bitBE(0x8,streamFile);
    }

    return vgmstream;

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