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genh: fix psx stereo, add gc adp/dtk, generally rewrite the format-specific bits

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git-svn-id: https://vgmstream.svn.sourceforge.net/svnroot/vgmstream@221 51a99a44-fe44-0410-b1ba-c3e57ba2b86b
This commit is contained in:
halleyscometsw 2008-06-12 23:33:07 +00:00
parent 7be33399d8
commit 268f485fa7
1 changed files with 58 additions and 8 deletions
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66
src/meta/genh.c
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@ -13,6 +13,8 @@ VGMSTREAM * init_vgmstream_genh(STREAMFILE *streamFile) {
int32_t sample_rate;
int32_t loop_start;
int32_t loop_end;
int32_t start_offset;
int32_t header_size;
char filename[260];
int coding;
@ -25,7 +27,8 @@ VGMSTREAM * init_vgmstream_genh(STREAMFILE *streamFile) {
/* check format */
/* 0 = PSX ADPCM */
/* 1 = XBOX IMA ADPCM (36 byte blocks) */
/* 1 = XBOX IMA ADPCM */
/* 2 = NGC ADP/DTK ADPCM */
/* ... others to come */
switch (read_32bitLE(0x18,streamFile)) {
case 0:
@ -34,10 +37,26 @@ VGMSTREAM * init_vgmstream_genh(STREAMFILE *streamFile) {
case 1:
coding = coding_XBOX;
break;
case 2:
coding = coding_NGC_DTK;
if (channel_count != 2) goto fail;
break;
default:
goto fail;
}
start_offset = read_32bitBE(0x1c,streamFile);
header_size = read_32bitBE(0x20,streamFile);
/* HACK to support old genh */
if (header_size == 0) {
start_offset = 0x800;
header_size = 0x800;
}
/* check for audio data start past header end */
if (header_size > start_offset) goto fail;
channel_count = read_32bitLE(0x4,streamFile);
interleave = read_32bitLE(0x8,streamFile);
sample_rate = read_32bitLE(0xc,streamFile);
@ -74,6 +93,9 @@ VGMSTREAM * init_vgmstream_genh(STREAMFILE *streamFile) {
vgmstream->layout_type = layout_interleave;
vgmstream->interleave_block_size = 36;
break;
case coding_NGC_DTK:
vgmstream->layout_type = layout_dtk_interleave;
break;
}
@ -82,16 +104,44 @@ VGMSTREAM * init_vgmstream_genh(STREAMFILE *streamFile) {
/* open the file for reading by each channel */
{
int i;
for (i=0;i<channel_count;i++) {
if (channel_count > 1 && vgmstream->layout_type == layout_interleave)
vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,interleave);
else
vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
STREAMFILE * chstreamfile = NULL;
if (!vgmstream->ch[i].streamfile) goto fail;
for (i=0;i<channel_count;i++) {
off_t chstart_offset = start_offset;
switch (coding) {
case coding_PSX:
if (vgmstream->layout_type == layout_interleave) {
chstreamfile =
streamFile->open(streamFile,filename,interleave);
chstart_offset =
start_offset+vgmstream->interleave_block_size*i;
} else {
chstreamfile =
streamFile->open(streamFile,filename,
STREAMFILE_DEFAULT_BUFFER_SIZE);
}
break;
case coding_XBOX:
/* xbox's "interleave" is a lie, all channels start at same
* offset */
chstreamfile =
streamFile->open(streamFile,filename,
STREAMFILE_DEFAULT_BUFFER_SIZE);
break;
case coding_NGC_DTK:
if (!chstreamfile)
chstreamfile =
streamFile->open(streamFile,filename,32*0x400);
break;
}
if (!chstreamfile) goto fail;
vgmstream->ch[i].streamfile = chstreamfile;
vgmstream->ch[i].channel_start_offset=
vgmstream->ch[i].offset=0x800;
vgmstream->ch[i].offset=start_offset;
}
}