vgmstream/src/meta/nds_strm.c
manakoAT a41c341a18 fsb updated (fsb4)
nds strm fixed
genh dsp interleave types added

git-svn-id: https://vgmstream.svn.sourceforge.net/svnroot/vgmstream@489 51a99a44-fe44-0410-b1ba-c3e57ba2b86b
2008-11-24 18:27:28 +00:00

172 lines
5.4 KiB
C

#include "meta.h"
#include "../util.h"
VGMSTREAM * init_vgmstream_nds_strm(STREAMFILE *streamFile) {
VGMSTREAM * vgmstream = NULL;
char filename[260];
coding_t coding_type;
int codec_number;
int channel_count;
int loop_flag;
off_t start_offset;
/* check extension, case insensitive */
streamFile->get_name(streamFile,filename,sizeof(filename));
if (strcasecmp("strm",filename_extension(filename))) goto fail;
/* check header */
if ((uint32_t)read_32bitBE(0x00,streamFile)!=0x5354524D) /* STRM */
goto fail;
if ((uint32_t)read_32bitBE(0x04,streamFile)!=0xFFFE0001 && /* Old Header Check */
((uint32_t)read_32bitBE(0x04,streamFile)!=0xFEFF0001)) /* Some newer games have a new flag */
goto fail;
/* check for HEAD section */
if ((uint32_t)read_32bitBE(0x10,streamFile)!=0x48454144 && /* "HEAD" */
(uint32_t)read_32bitLE(0x14,streamFile)!=0x50) /* 0x50-sized head is all I've seen */
goto fail;
/* check type details */
codec_number = read_8bit(0x18,streamFile);
loop_flag = read_8bit(0x19,streamFile);
channel_count = read_8bit(0x1a,streamFile);
switch (codec_number) {
case 0:
coding_type = coding_PCM8;
break;
case 1:
coding_type = coding_PCM16LE;
break;
case 2:
coding_type = coding_NDS_IMA;
break;
default:
goto fail;
}
/* TODO: only mono and stereo supported */
if (channel_count < 1 || channel_count > 2) goto fail;
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(channel_count,loop_flag);
if (!vgmstream) goto fail;
/* fill in the vital statistics */
vgmstream->num_samples = read_32bitLE(0x24,streamFile);
vgmstream->sample_rate = (uint16_t)read_16bitLE(0x1c,streamFile);
/* channels and loop flag are set by allocate_vgmstream */
vgmstream->loop_start_sample = read_32bitLE(0x20,streamFile);
vgmstream->loop_end_sample = vgmstream->num_samples;
vgmstream->coding_type = coding_type;
vgmstream->meta_type = meta_STRM;
vgmstream->interleave_block_size = read_32bitLE(0x30,streamFile);
vgmstream->interleave_smallblock_size = read_32bitLE(0x38,streamFile);
if (coding_type==coding_PCM8 || coding_type==coding_PCM16LE)
vgmstream->layout_type = layout_none;
else
vgmstream->layout_type = layout_interleave_shortblock;
start_offset = read_32bitLE(0x28,streamFile);
/* open the file for reading by each channel */
{
int i;
for (i=0;i<channel_count;i++) {
if (vgmstream->layout_type==layout_interleave_shortblock)
vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,
vgmstream->interleave_block_size);
else
vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,
0x1000);
if (!vgmstream->ch[i].streamfile) goto fail;
vgmstream->ch[i].channel_start_offset=
vgmstream->ch[i].offset=
start_offset + i*vgmstream->interleave_block_size;
}
}
return vgmstream;
/* clean up anything we may have opened */
fail:
if (vgmstream) close_vgmstream(vgmstream);
return NULL;
}
/* STRM (from Final Fantasy Tactics A2 - Fuuketsu no Grimoire) */
VGMSTREAM * init_vgmstream_nds_strm_ffta2(STREAMFILE *streamFile) {
VGMSTREAM * vgmstream = NULL;
char filename[260];
off_t start_offset;
int loop_flag;
int channel_count;
/* check extension, case insensitive */
streamFile->get_name(streamFile,filename,sizeof(filename));
if (strcasecmp("strm",filename_extension(filename))) goto fail;
/* check header */
if (read_32bitBE(0x00,streamFile) != 0x52494646 || /* RIFF */
read_32bitBE(0x08,streamFile) != 0x494D4120) /* "IMA " */
goto fail;
loop_flag = (read_32bitLE(0x20,streamFile) !=0);
channel_count = read_32bitLE(0x24,streamFile);
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(channel_count,loop_flag);
if (!vgmstream) goto fail;
/* fill in the vital statistics */
start_offset = 0x2C;
vgmstream->channels = channel_count;
vgmstream->sample_rate = read_32bitLE(0x0C,streamFile);
vgmstream->coding_type = coding_INT_IMA;
vgmstream->num_samples = (read_32bitLE(0x04,streamFile)-start_offset);
if (loop_flag) {
vgmstream->loop_start_sample = read_32bitLE(0x20,streamFile);
vgmstream->loop_end_sample = read_32bitLE(0x28,streamFile);
}
vgmstream->interleave_block_size = 0x80;
vgmstream->interleave_smallblock_size = (vgmstream->loop_end_sample)%((vgmstream->loop_end_sample)/vgmstream->interleave_block_size);
vgmstream->layout_type = layout_interleave_shortblock;
vgmstream->meta_type = meta_NDS_STRM_FFTA2;
/* 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;
}