mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-22 03:15:54 +01:00
83 lines
2.8 KiB
C
83 lines
2.8 KiB
C
#include "meta.h"
|
|
#include "../coding/coding.h"
|
|
|
|
/* XPCM - from Circus games [Eternal Fantasy (PC), D.C. White Season (PC)] */
|
|
VGMSTREAM * init_vgmstream_xpcm(STREAMFILE *streamFile) {
|
|
VGMSTREAM * vgmstream = NULL;
|
|
off_t start_offset;
|
|
size_t decompressed_size;
|
|
int loop_flag, channel_count, codec, flags, sample_rate;
|
|
|
|
|
|
/* checks */
|
|
if (!check_extensions(streamFile, "pcm"))
|
|
goto fail;
|
|
|
|
if (read_32bitBE(0x00,streamFile) != 0x5850434D) /* "XPCM" "*/
|
|
goto fail;
|
|
|
|
decompressed_size = read_32bitLE(0x04,streamFile); /* (data_size for PCM) */
|
|
codec = read_8bit(0x08, streamFile);
|
|
flags = read_8bit(0x09, streamFile);
|
|
/* 0x0a: always null */
|
|
/* 0x0c: always 0x01 (PCM codec) */
|
|
channel_count = read_16bitLE(0x0e,streamFile);
|
|
sample_rate = read_32bitLE(0x10,streamFile);
|
|
/* 0x14: average bitrate */
|
|
/* 0x18: block size */
|
|
/* 0x1a: output bits (16) */
|
|
start_offset = 0x1c; /* compressed size in codec 0x01/03 */
|
|
|
|
loop_flag = 0;
|
|
|
|
|
|
/* build the VGMSTREAM */
|
|
vgmstream = allocate_vgmstream(channel_count, loop_flag);
|
|
if (!vgmstream) goto fail;
|
|
|
|
vgmstream->meta_type = meta_XPCM;
|
|
vgmstream->sample_rate = sample_rate;
|
|
vgmstream->num_samples = decompressed_size / sizeof(int16_t) / channel_count;
|
|
|
|
switch(codec) {
|
|
case 0x00:
|
|
if (flags != 0) goto fail;
|
|
vgmstream->coding_type = coding_PCM16LE;
|
|
vgmstream->layout_type = layout_interleave;
|
|
vgmstream->interleave_block_size = 0x02;
|
|
break;
|
|
|
|
case 0x02:
|
|
if (flags != 0) goto fail;
|
|
vgmstream->coding_type = coding_CIRCUS_ADPCM;
|
|
vgmstream->layout_type = layout_interleave;
|
|
vgmstream->interleave_block_size = 0x01;
|
|
break;
|
|
|
|
case 0x01: /* VQ + LZ (usually music) */
|
|
case 0x03: /* VQ + deflate (usually sfx/voices) */
|
|
vgmstream->codec_data = init_circus_vq(streamFile, 0x20, codec, flags);
|
|
if (!vgmstream->codec_data) goto fail;
|
|
vgmstream->coding_type = coding_CIRCUS_VQ;
|
|
vgmstream->layout_type = layout_none;
|
|
|
|
/* not too sure about samples, since decompressed size isn't exact sometimes vs
|
|
* total decompression, though it's what the code uses to alloc bufs (plus + 0x2000 leeway) */
|
|
//vgmstream->num_samples = decompressed_size / 0x2000 * 4064 / channel_count;
|
|
//if (decompressed_size % 0x2000 != 0)
|
|
// vgmstream->num_samples += (decompressed_size % 0x2000) / channel_count;
|
|
break;
|
|
|
|
default:
|
|
goto fail;
|
|
}
|
|
|
|
if (!vgmstream_open_stream(vgmstream,streamFile,start_offset))
|
|
goto fail;
|
|
return vgmstream;
|
|
|
|
fail:
|
|
close_vgmstream(vgmstream);
|
|
return NULL;
|
|
}
|