From ff35f6c3cff35b0232a4d57c127849b090801da7 Mon Sep 17 00:00:00 2001
From: Christopher Snowhill <kode54@gmail.com>
Date: Sun, 7 Jul 2019 00:41:14 -0700
Subject: [PATCH] Updated VGMStream to r1050-2349-g5fe83c0c

---
 .../vgmstream/vgmstream/src/meta/meta.h       |  2 ++
 .../vgmstream/vgmstream/src/meta/opus.c       | 27 +++++++++++++++++++
 .../vgmstream/vgmstream/src/vgmstream.c       |  1 +
 3 files changed, 30 insertions(+)

diff --git a/Frameworks/vgmstream/vgmstream/src/meta/meta.h b/Frameworks/vgmstream/vgmstream/src/meta/meta.h
index 1eb4c1e89..db8804058 100644
--- a/Frameworks/vgmstream/vgmstream/src/meta/meta.h
+++ b/Frameworks/vgmstream/vgmstream/src/meta/meta.h
@@ -856,4 +856,6 @@ VGMSTREAM * init_vgmstream_fsb5_fev_bank(STREAMFILE * streamFile);
 
 VGMSTREAM * init_vgmstream_bwav(STREAMFILE * streamFile);
 
+VGMSTREAM * init_vgmstream_opus_prototype(STREAMFILE * streamFile);
+
 #endif /*_META_H*/
diff --git a/Frameworks/vgmstream/vgmstream/src/meta/opus.c b/Frameworks/vgmstream/vgmstream/src/meta/opus.c
index 1866532ce..24c1d8939 100644
--- a/Frameworks/vgmstream/vgmstream/src/meta/opus.c
+++ b/Frameworks/vgmstream/vgmstream/src/meta/opus.c
@@ -341,3 +341,30 @@ VGMSTREAM * init_vgmstream_opus_opusx(STREAMFILE *streamFile) {
 fail:
     return NULL;
 }
+
+/* Prototype variation [Clannad (Switch)] */
+VGMSTREAM * init_vgmstream_opus_prototype(STREAMFILE *streamFile) {
+    off_t offset = 0;
+    int num_samples = 0, loop_start = 0, loop_end = 0, loop_flag;
+
+    /* checks */
+    if (!check_extensions(streamFile, "opus,lopus"))
+        goto fail;
+    if (read_32bitBE(0x00, streamFile) != 0x4F505553 || /* "OPUS" */
+        read_32bitBE(0x18, streamFile) != 0x01000080)
+        goto fail;
+
+    offset = 0x18;
+    num_samples = read_32bitLE(0x08, streamFile);
+
+    /* Check if there's a loop end value to determine loop_flag*/
+    loop_flag = read_32bitLE(0x10, streamFile);
+    if (loop_flag) {
+        loop_start = read_32bitLE(0x0C, streamFile);
+        loop_end = read_32bitLE(0x10, streamFile);
+    }
+
+    return init_vgmstream_opus(streamFile, meta_OPUS, offset, num_samples, loop_start, loop_end);
+fail:
+    return NULL;
+}
diff --git a/Frameworks/vgmstream/vgmstream/src/vgmstream.c b/Frameworks/vgmstream/vgmstream/src/vgmstream.c
index c39385ef3..97fac729e 100644
--- a/Frameworks/vgmstream/vgmstream/src/vgmstream.c
+++ b/Frameworks/vgmstream/vgmstream/src/vgmstream.c
@@ -481,6 +481,7 @@ VGMSTREAM * (*init_vgmstream_functions[])(STREAMFILE *streamFile) = {
     init_vgmstream_9tav,
     init_vgmstream_fsb5_fev_bank,
     init_vgmstream_bwav,
+    init_vgmstream_opus_prototype,
 
     /* lowest priority metas (should go after all metas, and TXTH should go before raw formats) */
     init_vgmstream_txth,            /* proper parsers should supersede TXTH, once added */