From 1d2e9793e5ad43874c1fe054853d4285cc3e97ef Mon Sep 17 00:00:00 2001
From: bxaimc <bxaimc@yahoo.com>
Date: Wed, 26 Jun 2019 02:26:44 -0400
Subject: [PATCH] Add preliminary BWAV support [Super Mario Maker 2 (Switch)]

---
 src/formats.c   |  2 ++
 src/meta/bwav.c | 62 +++++++++++++++++++++++++++++++++++++++++++++++++
 src/meta/meta.h |  2 ++
 src/vgmstream.c |  1 +
 src/vgmstream.h |  1 +
 5 files changed, 68 insertions(+)
 create mode 100644 src/meta/bwav.c

diff --git a/src/formats.c b/src/formats.c
index 6aec9876..bb47f437 100644
--- a/src/formats.c
+++ b/src/formats.c
@@ -101,6 +101,7 @@ static const char* extension_list[] = {
     "brstmspm",
     "btsnd",
     "bvg",
+    "bwav",
 
     "caf",
     "capdsp",
@@ -1189,6 +1190,7 @@ static const meta_info meta_info_list[] = {
         {meta_MSF_KONAMI,           "Konami MSF header"},
         {meta_XWMA_KONAMI,          "Konami XWMA header"},
         {meta_9TAV,                 "Konami 9TAV header"},
+        {meta_BWAV,                 "Nintendo BWAV header"},
 
 };
 
diff --git a/src/meta/bwav.c b/src/meta/bwav.c
new file mode 100644
index 00000000..2dbaa178
--- /dev/null
+++ b/src/meta/bwav.c
@@ -0,0 +1,62 @@
+#include "meta.h"
+#include "../coding/coding.h"
+
+/* BWAV - NintendoWare(?) [Super Mario Maker 2 (Switch)] */
+VGMSTREAM * init_vgmstream_bwav(STREAMFILE *streamFile) {
+    VGMSTREAM * vgmstream = NULL;
+    off_t start_offset;
+    int channel_count, loop_flag;
+    int big_endian;
+    size_t interleave = 0;
+    int32_t coef_start_offset, coef_spacing;
+    int32_t (*read_32bit)(off_t,STREAMFILE*) = NULL;
+    int16_t (*read_16bit)(off_t,STREAMFILE*) = NULL;
+
+    /* checks */
+    if (!check_extensions(streamFile, "bwav"))
+        goto fail;
+
+    /* BWAV header */
+    if (read_32bitBE(0x00, streamFile) != 0x42574156) /* "BWAV" */
+        goto fail;
+
+    if ((uint16_t)read_16bitBE(0x04, streamFile) == 0xFEFF) { /* BE BOM check */
+        read_32bit = read_32bitBE;
+        read_16bit = read_16bitBE;
+        big_endian = 1;
+    } else if ((uint16_t)read_16bitBE(0x04, streamFile) == 0xFFFE) { /* LE BOM check */
+        read_32bit = read_32bitLE;
+        read_16bit = read_16bitLE;
+        big_endian = 0;
+    } else {
+        goto fail;
+    }
+
+	channel_count = 1; //read_8bit(0x0E, streamFile); Needs to be checked
+    start_offset = read_32bit(0x40, streamFile);
+	loop_flag = 0;
+
+    /* build the VGMSTREAM */
+    vgmstream = allocate_vgmstream(channel_count, loop_flag);
+    if (!vgmstream) goto fail;
+
+    vgmstream->sample_rate = read_32bit(0x14, streamFile);
+    vgmstream->num_samples = read_32bit(0x18, streamFile);
+    vgmstream->meta_type = meta_BWAV;
+    vgmstream->layout_type = (channel_count == 1) ? layout_none : layout_interleave;
+    vgmstream->interleave_block_size = 0x08; //Maybe half-file? Needs to be checked
+    vgmstream->coding_type = coding_NGC_DSP;
+    
+    coef_start_offset = 0x20;
+    coef_spacing = 0x4C;
+    dsp_read_coefs_le(vgmstream, streamFile, coef_start_offset, coef_spacing);
+
+
+    if (!vgmstream_open_stream(vgmstream,streamFile,start_offset))
+        goto fail;
+    return vgmstream;
+
+fail:
+    close_vgmstream(vgmstream);
+    return NULL;
+}
diff --git a/src/meta/meta.h b/src/meta/meta.h
index a1111095..1eb4c1e8 100644
--- a/src/meta/meta.h
+++ b/src/meta/meta.h
@@ -854,4 +854,6 @@ VGMSTREAM * init_vgmstream_9tav(STREAMFILE* streamFile);
 
 VGMSTREAM * init_vgmstream_fsb5_fev_bank(STREAMFILE * streamFile);
 
+VGMSTREAM * init_vgmstream_bwav(STREAMFILE * streamFile);
+
 #endif /*_META_H*/
diff --git a/src/vgmstream.c b/src/vgmstream.c
index 1cd0be53..c39385ef 100644
--- a/src/vgmstream.c
+++ b/src/vgmstream.c
@@ -480,6 +480,7 @@ VGMSTREAM * (*init_vgmstream_functions[])(STREAMFILE *streamFile) = {
     init_vgmstream_xwma_konami,
     init_vgmstream_9tav,
     init_vgmstream_fsb5_fev_bank,
+    init_vgmstream_bwav,
 
     /* 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 */
diff --git a/src/vgmstream.h b/src/vgmstream.h
index 3ee515ad..f2c480cf 100644
--- a/src/vgmstream.h
+++ b/src/vgmstream.h
@@ -730,6 +730,7 @@ typedef enum {
     meta_MSF_KONAMI,
     meta_XWMA_KONAMI,
     meta_9TAV,
+    meta_BWAV,
 
 } meta_t;