From 8bbf38b20fdfb9633cdae7d80f9f92f1dc9c0576 Mon Sep 17 00:00:00 2001
From: bnnm <bananaman255@gmail.com>
Date: Tue, 24 Sep 2019 00:53:52 +0200
Subject: [PATCH] Add Edelweiss OPUSNX .opus/lopus [Astebreed (Switch)]

---
 src/meta/meta.h |  4 ++--
 src/meta/opus.c | 21 +++++++++++++++++++++
 src/vgmstream.c |  1 +
 3 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/src/meta/meta.h b/src/meta/meta.h
index ea962817..a8fc3886 100644
--- a/src/meta/meta.h
+++ b/src/meta/meta.h
@@ -643,6 +643,8 @@ VGMSTREAM * init_vgmstream_opus_nus3(STREAMFILE * streamFile);
 VGMSTREAM * init_vgmstream_opus_sps_n1(STREAMFILE * streamFile);
 VGMSTREAM * init_vgmstream_opus_nxa(STREAMFILE * streamFile);
 VGMSTREAM * init_vgmstream_opus_opusx(STREAMFILE * streamFile);
+VGMSTREAM * init_vgmstream_opus_prototype(STREAMFILE * streamFile);
+VGMSTREAM * init_vgmstream_opus_opusnx(STREAMFILE * streamFile);
 
 VGMSTREAM * init_vgmstream_pc_al2(STREAMFILE * streamFile);
 
@@ -832,8 +834,6 @@ VGMSTREAM * init_vgmstream_fsb5_fev_bank(STREAMFILE * streamFile);
 
 VGMSTREAM * init_vgmstream_bwav(STREAMFILE * streamFile);
 
-VGMSTREAM * init_vgmstream_opus_prototype(STREAMFILE * streamFile);
-
 VGMSTREAM * init_vgmstream_awb(STREAMFILE * streamFile);
 VGMSTREAM * init_vgmstream_awb_memory(STREAMFILE * streamFile, STREAMFILE *acbFile);
 
diff --git a/src/meta/opus.c b/src/meta/opus.c
index 7127f7ac..b9e593ae 100644
--- a/src/meta/opus.c
+++ b/src/meta/opus.c
@@ -390,3 +390,24 @@ VGMSTREAM * init_vgmstream_opus_prototype(STREAMFILE *streamFile) {
 fail:
     return NULL;
 }
+
+/* Edelweiss variation [Astebreed (Switch)] */
+VGMSTREAM * init_vgmstream_opus_opusnx(STREAMFILE *streamFile) {
+    off_t offset = 0;
+    int num_samples = 0, loop_start = 0, loop_end = 0;
+
+    /* checks */
+    if (!check_extensions(streamFile, "opus,lopus"))
+        goto fail;
+    if (read_64bitBE(0x00, streamFile) != 0x4F5055534E580000) /* "OPUSNX\0\0" */
+        goto fail;
+
+    offset = 0x10;
+    num_samples = 0; //read_32bitLE(0x08, streamFile); /* samples with encoder delay */
+    if (read_32bitLE(0x0c, streamFile) != 0)
+        goto fail;
+
+    return init_vgmstream_opus(streamFile, meta_OPUS, offset, num_samples, loop_start, loop_end);
+fail:
+    return NULL;
+}
diff --git a/src/vgmstream.c b/src/vgmstream.c
index 2327bd74..e1178cf3 100644
--- a/src/vgmstream.c
+++ b/src/vgmstream.c
@@ -479,6 +479,7 @@ VGMSTREAM * (*init_vgmstream_functions[])(STREAMFILE *streamFile) = {
     init_vgmstream_xmv_valve,
     init_vgmstream_ubi_hx,
     init_vgmstream_bmp_konami,
+    init_vgmstream_opus_opusnx,
 
     /* 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 */