vgmstream/src/meta/ps2_xau.c

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

/* XAU (Spectral Force Chronicle [SLPM-65967]) */
VGMSTREAM * init_vgmstream_ps2_xau(STREAMFILE *streamFile) 
{
    VGMSTREAM * vgmstream = NULL;
    char filename[PATH_LIMIT];
    off_t start_offset;
    
	int loop_flag = 0;
	int channel_count;


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

    /* check header */
    if (read_32bitBE(0x00,streamFile) != 0x58415500)
        goto fail;

	loop_flag = 0;
	channel_count = read_8bit(0x18,streamFile);
    
	/* build the VGMSTREAM */
    vgmstream = allocate_vgmstream(channel_count, loop_flag);
    if (!vgmstream) goto fail;

	/* fill in the vital statistics */
	start_offset = 0x800;
		
	vgmstream->channels = channel_count;
    vgmstream->sample_rate = read_32bitBE(0x50, streamFile);
    vgmstream->coding_type = coding_PSX;
	vgmstream->num_samples = ((read_32bitBE(0x4C, streamFile) * channel_count)/ 16 / channel_count * 28);

    vgmstream->layout_type = layout_interleave;
    vgmstream->interleave_block_size = 0x8000;
	vgmstream->meta_type = meta_PS2_XAU;

    /* 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;
}