#include "meta.h" #include "../util.h" /* a simple PS2 ADPCM format seen in Langrisser 3 */ VGMSTREAM * init_vgmstream_ivb(STREAMFILE *streamFile) { VGMSTREAM * vgmstream = NULL; char filename[PATH_LIMIT]; off_t start_offset; off_t stream_length; int loop_flag = 0; int channel_count; /* check extension, case insensitive */ streamFile->get_name(streamFile,filename,sizeof(filename)); if (strcasecmp("ivb",filename_extension(filename))) goto fail; /* check header */ if (read_32bitBE(0x00,streamFile) != 0x42564949) /* "BVII", probably */ goto fail; /* supposed to be "IIVB"*/ loop_flag = 0; channel_count = 2; /* build the VGMSTREAM */ vgmstream = allocate_vgmstream(channel_count,loop_flag); if (!vgmstream) goto fail; /* fill in the vital statistics */ vgmstream->channels = channel_count; vgmstream->sample_rate = read_32bitBE(0x8,streamFile); /* big endian? */ vgmstream->coding_type = coding_PSX; stream_length = read_32bitLE(0x04,streamFile); start_offset = 0x10; vgmstream->num_samples = stream_length*28/16; vgmstream->layout_type = layout_none; vgmstream->meta_type = meta_PS2_IVB; /* open the file for reading */ { int i; for (i=0;i<channel_count;i++) { vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE); if (!vgmstream->ch[i].streamfile) goto fail; vgmstream->ch[i].channel_start_offset= vgmstream->ch[i].offset=start_offset+stream_length*i; } } return vgmstream; /* clean up anything we may have opened */ fail: if (vgmstream) close_vgmstream(vgmstream); return NULL; }