vgmstream/src/meta/ydsp.c

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

/* YDSP (from WWE Day of Reckoning) */
VGMSTREAM * init_vgmstream_ydsp(STREAMFILE *streamFile) {
    VGMSTREAM * vgmstream = NULL;
    char filename[PATH_LIMIT];
    int loop_flag;
    int channel_count;
    off_t start_offset;

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

    /* check header */
    if (read_32bitBE(0x00,streamFile) != 0x59445350) /* "YDSP" */
      goto fail;

    loop_flag = (read_32bitBE(0xB0,streamFile)!=0x0);
    channel_count = (uint16_t)read_16bitBE(0x10,streamFile);
    
    /* build the VGMSTREAM */
    vgmstream = allocate_vgmstream(channel_count,loop_flag);
    if (!vgmstream) goto fail;

    /* fill in the vital statistics */
    start_offset = 0x120;
	  vgmstream->channels = channel_count;
    vgmstream->sample_rate = read_32bitBE(0x0C,streamFile);
    vgmstream->coding_type = coding_NGC_DSP;
    vgmstream->meta_type = meta_YDSP;

    vgmstream->num_samples = (read_32bitBE(0x08,streamFile))*14/8/channel_count;

    if (loop_flag)
    {
      vgmstream->loop_start_sample = read_32bitBE(0xB0,streamFile);
      vgmstream->loop_end_sample = read_32bitBE(0xB4,streamFile);
    }

	  if (channel_count == 1)
    {
      vgmstream->layout_type = layout_none;
    }
    else if (channel_count == 2)
    {
      vgmstream->interleave_block_size = read_32bitBE(0x14,streamFile);
      vgmstream->layout_type = layout_interleave;
    }
    	


    /* open the file for reading */
    
	  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(0x44+i*2,streamFile);
          }
        }
    }

    {
        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;
}