Add .nus3audio [Super Smash Bros. Ultimate (Switch)]

src/formats.c

@@ -263,6 +263,7 @@ static const char* extension_list[] = {
     "nop",
     "nps",
     "npsf", //fake extension/header id for .nps (in bigfiles)
+    "nus3audio",
     "nus3bank",
     "nwa",
     "nwav",

src/libvgmstream.vcproj

@@ -846,6 +846,10 @@
                     RelativePath=".\meta\nub_xma.c"
                     >
                 </File>
+                <File
+                    RelativePath=".\meta\nus3audio.c"
+                    >
+                </File>
                 <File
                     RelativePath=".\meta\nus3bank.c"
                     >

src/libvgmstream.vcxproj

@@ -319,6 +319,7 @@
     <ClCompile Include="meta\ngc_ulw.c" />
     <ClCompile Include="meta\ngc_vid1.c" />
     <ClCompile Include="meta\nub_xma.c" />
+    <ClCompile Include="meta\nus3audio.c" />
     <ClCompile Include="meta\nus3bank.c" />
     <ClCompile Include="meta\nwa.c" />
     <ClCompile Include="meta\nwav.c" />

src/libvgmstream.vcxproj.filters

@@ -520,6 +520,9 @@
     <ClCompile Include="meta\nub_xma.c">
       <Filter>meta\Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="meta\nus3audio.c">
+      <Filter>meta\Source Files</Filter>
+    </ClCompile>
     <ClCompile Include="meta\nus3bank.c">
       <Filter>meta\Source Files</Filter>
     </ClCompile>

src/meta/meta.h

@@ -819,4 +819,6 @@ VGMSTREAM * init_vgmstream_zsnd(STREAMFILE * streamFile);
 
 VGMSTREAM * init_vgmstream_ogg_opus(STREAMFILE * streamFile);
 
+VGMSTREAM * init_vgmstream_nus3audio(STREAMFILE * streamFile);
+
 #endif /*_META_H*/

src/meta/nus3audio.c

@@ -0,0 +1,119 @@
+#include "meta.h"
+#include "../coding/coding.h"
+
+typedef enum { IDSP, OPUS, } nus3audio_codec;
+
+/* .nus3audio - Namco's newest newest audio container [Super Smash Bros. Ultimate (Switch)] */
+VGMSTREAM * init_vgmstream_nus3audio(STREAMFILE *streamFile) {
+    VGMSTREAM *vgmstream = NULL;
+    STREAMFILE *temp_streamFile = NULL;
+    off_t subfile_offset = 0, name_offset = 0;
+    size_t subfile_size = 0;
+    nus3audio_codec codec;
+    const char* fake_ext = NULL;
+    int total_subsongs, target_subsong = streamFile->stream_index;
+
+
+    /* checks */
+    if (!check_extensions(streamFile, "nus3audio"))
+        goto fail;
+    if (read_32bitBE(0x00,streamFile) != 0x4E555333) /* "NUS3" */
+        goto fail;
+    if (read_32bitLE(0x04,streamFile) + 0x08 != get_streamfile_size(streamFile))
+        goto fail;
+    if (read_32bitBE(0x08,streamFile) != 0x41554449) /* "AUDI" */
+        goto fail;
+
+
+    /* parse existing chunks */
+    {
+        off_t offset = 0x0c;
+        size_t file_size = get_streamfile_size(streamFile);
+        uint32_t codec_id = 0;
+
+        total_subsongs = 0;
+
+        while (offset < file_size) {
+            uint32_t chunk_id  = (uint32_t)read_32bitBE(offset+0x00, streamFile);
+            size_t chunk_size  =   (size_t)read_32bitLE(offset+0x04, streamFile);
+
+            switch(chunk_id) {
+                case 0x494E4458: /* "INDX": audio index */
+                    total_subsongs = read_32bitLE(offset+0x08 + 0x00,streamFile);
+                    if (target_subsong == 0) target_subsong = 1;
+                    if (target_subsong < 0 || target_subsong > total_subsongs || total_subsongs < 1) goto fail;
+                    break;
+
+                case 0x4E4D4F46: /* "NMOF": name offsets (absolute, inside TNNM) */
+                    name_offset = read_32bitLE(offset+0x08 + 0x04*(target_subsong-1),streamFile);
+                    break;
+
+                case 0x41444F46: /* "ADOF": audio offsets (absolute, inside PACK) */
+                    subfile_offset = read_32bitLE(offset+0x08 + 0x08*(target_subsong-1) + 0x00,streamFile);
+                    subfile_size   = read_32bitLE(offset+0x08 + 0x08*(target_subsong-1) + 0x04,streamFile);
+                    break;
+
+                case 0x544E4944: /* "TNID": tone ids? */
+                case 0x544E4E4D: /* "TNNM": tone names */
+                case 0x4A554E4B: /* "JUNK": padding */
+                case 0x5041434B: /* "PACK": main data */
+                default:
+                    break;
+            }
+
+            offset += 0x08 + chunk_size;
+        }
+
+        if (total_subsongs == 0 || subfile_offset == 0 || subfile_size == 0) {
+            VGM_LOG("NUS3AUDIO: subfile not found\n");
+            goto fail;
+        }
+
+        codec_id = read_32bitBE(subfile_offset, streamFile);
+        switch(codec_id) {
+            case 0x49445350: /* "IDSP" */
+                codec = IDSP;
+                fake_ext = "idsp";
+                break;
+            case 0x4F505553: /* "OPUS" */
+                codec = OPUS;
+                fake_ext = "opus";
+                break;
+            default:
+                VGM_LOG("NUS3AUDIO: unknown codec %x\n", codec_id);
+                goto fail;
+        }
+    }
+
+
+    temp_streamFile = setup_subfile_streamfile(streamFile, subfile_offset,subfile_size, fake_ext);
+    if (!temp_streamFile) goto fail;
+
+    /* init the VGMSTREAM */
+    switch(codec) {
+        case IDSP:
+            vgmstream = init_vgmstream_idsp_nus3(temp_streamFile);
+            if (!vgmstream) goto fail;
+            break;
+        case OPUS:
+            vgmstream = init_vgmstream_opus_nus3(temp_streamFile);
+            if (!vgmstream) goto fail;
+            break;
+        default:
+            goto fail;
+    }
+
+    vgmstream->num_streams = total_subsongs;
+    if (name_offset) /* null-terminated */
+        read_string(vgmstream->stream_name,STREAM_NAME_SIZE, name_offset,streamFile);
+
+    close_streamfile(temp_streamFile);
+    return vgmstream;
+
+fail:
+    close_streamfile(temp_streamFile);
+    close_vgmstream(vgmstream);
+    return NULL;
+}
+
+

src/vgmstream.c

@@ -456,6 +456,7 @@ VGMSTREAM * (*init_vgmstream_functions[])(STREAMFILE *streamFile) = {
     init_vgmstream_opus_opusx,
     init_vgmstream_dsp_adpcmx,
     init_vgmstream_ogg_opus,
+    init_vgmstream_nus3audio,
 
     /* 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 */