1 files changed, 124 insertions, 0 deletions
diff --git a/lib/vgmstream/src/meta/wii_mus.c b/lib/vgmstream/src/meta/wii_mus.c
new file mode 100644
index 0000000000..a6cdd979e5
--- /dev/null
+++ b/lib/vgmstream/src/meta/wii_mus.c
@@ -0,0 +1,124 @@
+#include "meta.h"
+#include "../layout/layout.h"
+#include "../coding/coding.h"
+#include "../util.h"
+
+/* .mus, as seen in Star Wars The Force Unleashed for Wii */
+/* Doesn't seem to be working quite right yet, coef table looks odd */
+VGMSTREAM * init_vgmstream_wii_mus(STREAMFILE *streamFile) {
+    VGMSTREAM * vgmstream = NULL;
+    char filename[260];
+
+    off_t start_offset;
+    off_t interleave;
+
+    int i;
+    struct {
+        uint16_t gain;
+        uint16_t initial_ps;
+        uint16_t initial_hist1;
+        uint16_t initial_hist2;
+        uint16_t loop_ps;
+        /*
+        uint16_t loop_hist1;
+        uint16_t loop_hist2;
+        */
+    } channel[2];
+
+    /* check extension, case insensitive */
+    streamFile->get_name(streamFile,filename,sizeof(filename));
+    if (strcasecmp("mus",filename_extension(filename))) goto fail;
+
+    start_offset = read_32bitBE(0x08,streamFile);
+    interleave = read_32bitBE(0x04,streamFile);
+
+    for (i=0;i<2;i++)
+    {
+        channel[i].gain = read_16bitBE(0x30+i*0x2e,streamFile);
+        channel[i].initial_ps = read_16bitBE(0x32+i*0x2e,streamFile);
+        channel[i].initial_hist1 = read_16bitBE(0x34+i*0x2e,streamFile);
+        channel[i].initial_hist2 = read_16bitBE(0x36+i*0x2e,streamFile);
+        channel[i].loop_ps = read_16bitBE(0x38+i*0x2e,streamFile);
+    }
+
+    /* check initial predictor/scale */
+    if (channel[0].initial_ps != (uint8_t)read_8bit(start_offset,streamFile))
+        goto fail;
+    if (channel[1].initial_ps != (uint8_t)read_8bit(start_offset+interleave,streamFile))
+        goto fail;
+
+    /* check type==0 and gain==0 */
+    if (channel[0].gain ||
+        channel[1].gain)
+        goto fail;
+
+#if 0
+    if (ch0_header.loop_flag) {
+        off_t loop_off;
+        /* check loop predictor/scale */
+        loop_off = ch0_header.loop_start_offset/16*8;
+        loop_off = (loop_off/interleave*interleave*2) + (loop_off%interleave);
+        if (ch0_header.loop_ps != (uint8_t)read_8bit(start_offset+loop_off,streamFile))
+            goto fail;
+        if (ch1_header.loop_ps != (uint8_t)read_8bit(start_offset+loop_off+interleave,streamFile))
+            goto fail;
+    }
+#endif
+
+    /* build the VGMSTREAM */
+
+    vgmstream = allocate_vgmstream(2,0);
+    if (!vgmstream) goto fail;
+
+    /* fill in the vital statistics */
+    vgmstream->num_samples = read_32bitBE(0x0,streamFile);
+    vgmstream->sample_rate = (uint16_t)read_16bitBE(0x6c,streamFile);
+
+    /* TODO: adjust for interleave? */
+#if 0
+    vgmstream->loop_start_sample = dsp_nibbles_to_samples(
+            ch0_header.loop_start_offset);
+    vgmstream->loop_end_sample =  dsp_nibbles_to_samples(
+            ch0_header.loop_end_offset)+1;
+#endif
+
+    vgmstream->coding_type = coding_NGC_DSP;
+    vgmstream->layout_type = layout_interleave;
+    vgmstream->interleave_block_size = interleave;
+    vgmstream->meta_type = meta_DSP_WII_MUS;
+
+    /* coeffs */
+    for (i=0;i<16;i++) {
+        vgmstream->ch[0].adpcm_coef[i] = read_16bitBE(0x10 + i*2,streamFile);
+        vgmstream->ch[1].adpcm_coef[i] = read_16bitBE(0x3e + i*2,streamFile);
+    }
+    
+    /* initial history */
+    /* always 0 that I've ever seen, but for completeness... */
+    vgmstream->ch[0].adpcm_history1_16 = channel[0].initial_hist1;
+    vgmstream->ch[0].adpcm_history2_16 = channel[0].initial_hist2;
+    vgmstream->ch[1].adpcm_history1_16 = channel[1].initial_hist1;
+    vgmstream->ch[1].adpcm_history2_16 = channel[1].initial_hist2;
+
+    vgmstream->ch[0].streamfile = streamFile->open(streamFile,filename,interleave);
+    if (!vgmstream->ch[0].streamfile) goto fail;
+    vgmstream->ch[1].streamfile = streamFile->open(streamFile,filename,interleave);
+    if (!vgmstream->ch[1].streamfile) goto fail;
+
+    /* open the file for reading */
+    for (i=0;i<2;i++) {
+        vgmstream->ch[i].channel_start_offset=
+            vgmstream->ch[i].offset=start_offset+i*interleave;
+    }
+
+    return vgmstream;
+
+fail:
+    /* clean up anything we may have opened */
+    if (vgmstream) {
+        if (vgmstream->ch[0].streamfile) close_streamfile(vgmstream->ch[0].streamfile);
+        close_vgmstream(vgmstream);
+    }
+    return NULL;
+}
+