1 files changed, 79 insertions, 0 deletions
diff --git a/lib/vgmstream/src/meta/ps2_exst.c b/lib/vgmstream/src/meta/ps2_exst.c
new file mode 100644
index 0000000000..5451262255
--- /dev/null
+++ b/lib/vgmstream/src/meta/ps2_exst.c
@@ -0,0 +1,79 @@
+#include "meta.h"
+#include "../util.h"
+
+/* EXST
+
+   PS2 INT format is an interleaved format found in Shadow of the Colossus                
+   The header start with a EXST id.
+   The headers and bgm datas was separated in the game, and joined in order
+   to add support for vgmstream
+
+   The interleave value is allways 0x400
+   known extensions : .STS
+
+   2008-05-13 - Fastelbja : First version ...
+*/
+
+VGMSTREAM * init_vgmstream_ps2_exst(STREAMFILE *streamFile) {
+    VGMSTREAM * vgmstream = NULL;
+    char filename[260];
+
+    int loop_flag=0;
+    int channel_count;
+    int i;
+
+    /* check extension, case insensitive */
+    streamFile->get_name(streamFile,filename,sizeof(filename));
+    if (strcasecmp("sts",filename_extension(filename))) goto fail;
+
+    /* check EXST Header */
+    if (read_32bitBE(0x00,streamFile) != 0x45585354)
+        goto fail;
+
+    /* check loop */
+    loop_flag = (read_32bitLE(0x0C,streamFile)==1);
+
+    channel_count=read_16bitLE(0x06,streamFile);
+
+    /* build the VGMSTREAM */
+    vgmstream = allocate_vgmstream(channel_count,loop_flag);
+    if (!vgmstream) goto fail;
+
+    /* fill in the vital statistics */
+    vgmstream->channels = read_16bitLE(0x06,streamFile);
+    vgmstream->sample_rate = read_32bitLE(0x08,streamFile);
+
+    /* Compression Scheme */
+    vgmstream->coding_type = coding_PSX;
+    vgmstream->num_samples = (read_32bitLE(0x14,streamFile)*0x400)/16*28;
+
+    /* Get loop point values */
+    if(vgmstream->loop_flag) {
+        vgmstream->loop_start_sample = (read_32bitLE(0x10,streamFile)*0x400)/16*28;
+        vgmstream->loop_end_sample = (read_32bitLE(0x14,streamFile)*0x400)/16*28;
+    }
+
+    vgmstream->interleave_block_size = 0x400;
+    vgmstream->layout_type = layout_interleave;
+    vgmstream->meta_type = meta_PS2_EXST;
+
+    /* open the file for reading by each channel */
+    {
+        for (i=0;i<channel_count;i++) {
+            vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,0x8000);
+
+            if (!vgmstream->ch[i].streamfile) goto fail;
+
+            vgmstream->ch[i].channel_start_offset=
+                vgmstream->ch[i].offset=
+                (off_t)(0x78+vgmstream->interleave_block_size*i);
+        }
+    }
+
+    return vgmstream;
+
+    /* clean up anything we may have opened */
+fail:
+    if (vgmstream) close_vgmstream(vgmstream);
+    return NULL;
+}